Merge tag 'please-pull-ia64_for_5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux

Pull ia64 updates from Tony Luck: "The big change here is removal of support for SGI Altix" * tag 'please-pull-ia64_for_5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux: (33 commits) genirq: remove the is_affinity_mask_valid hook ia64: remove CONFIG_SWIOTLB ifdefs ia64: remove support for machvecs ia64: move the screen_info setup to common code ia64: move the ROOT_DEV setup to common code ia64: rework iommu probing ia64: remove the unused sn_coherency_id symbol ia64: remove the SGI UV simulator support ia64: remove the zx1 swiotlb machvec ia64: remove CONFIG_ACPI ifdefs ia64: remove CONFIG_PCI ifdefs ia64: remove the hpsim platform ia64: remove now unused machvec indirections ia64: remove support for the SGI SN2 platform drivers: remove the SGI SN2 IOC4 base support drivers: remove the SGI SN2 IOC3 base support qla2xxx: remove SGI SN2 support qla1280: remove SGI SN2 support misc/sgi-xp: remove SGI SN2 support char/mspec: remove SGI SN2 support ...
author: Linus Torvalds 2019-09-16 15:32:01 -0700
committer: Linus Torvalds 2019-09-16 15:32:01 -0700
commit: 76f0f227cffb570bc5ce343b1750f14907371d80 (patch)
tree: 7bbbf7174a7c7cc834936a18a73fc95161b4228e /drivers
parent: 58d4fafd0b4c36838077a5d7b17df537b7226f1c (diff)
parent: 0d3d343560bad8e1b7879fe94251cfe731a2dd13 (diff)
47 files changed, 40 insertions, 14813 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 61cf4ea2c229..477d63d0364d 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -30,8 +30,6 @@ source "drivers/block/Kconfig"
 
 source "drivers/nvme/Kconfig"
 
-# misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
-
 source "drivers/misc/Kconfig"
 
 source "drivers/ide/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 6d37564e783c..05be8c798c51 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -132,7 +132,6 @@ obj-y				+= mmc/
 obj-$(CONFIG_MEMSTICK)		+= memstick/
 obj-$(CONFIG_NEW_LEDS)		+= leds/
 obj-$(CONFIG_INFINIBAND)	+= infiniband/
-obj-$(CONFIG_SGI_SN)		+= sn/
 obj-y				+= firmware/
 obj-$(CONFIG_CRYPTO)		+= crypto/
 obj-$(CONFIG_SUPERH)		+= sh/
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 5f6158973289..ebe1e9e5fd81 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -323,7 +323,7 @@ config ACPI_NUMA
 	bool "NUMA support"
 	depends on NUMA
 	depends on (X86 || IA64 || ARM64)
-	default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64
+	default y if IA64 || ARM64
 
 config ACPI_CUSTOM_DSDT_FILE
 	string "Custom DSDT Table file to include"
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 2794f4b3f62d..df0fc997dc3e 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -26,28 +26,6 @@ config DEVKMEM
 	  kind of kernel debugging operations.
 	  When in doubt, say "N".
 
-config SGI_SNSC
-	bool "SGI Altix system controller communication support"
-	depends on (IA64_SGI_SN2 || IA64_GENERIC)
-	help
-	  If you have an SGI Altix and you want to enable system
-	  controller communication from user space (you want this!),
-	  say Y.  Otherwise, say N.
-
-config SGI_TIOCX
-       bool "SGI TIO CX driver support"
-       depends on (IA64_SGI_SN2 || IA64_GENERIC)
-       help
-         If you have an SGI Altix and you have fpga devices attached
-         to your TIO, say Y here, otherwise say N.
-
-config SGI_MBCS
-       tristate "SGI FPGA Core Services driver support"
-       depends on SGI_TIOCX
-       help
-         If you have an SGI Altix with an attached SABrick
-         say Y or M here, otherwise say N.
-
 source "drivers/tty/serial/Kconfig"
 source "drivers/tty/serdev/Kconfig"
 
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index fbea7dd12932..7c5ea6f9df14 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -9,11 +9,9 @@ obj-y				+= misc.o
 obj-$(CONFIG_ATARI_DSP56K)	+= dsp56k.o
 obj-$(CONFIG_VIRTIO_CONSOLE)	+= virtio_console.o
 obj-$(CONFIG_RAW_DRIVER)	+= raw.o
-obj-$(CONFIG_SGI_SNSC)		+= snsc.o snsc_event.o
 obj-$(CONFIG_MSPEC)		+= mspec.o
 obj-$(CONFIG_UV_MMTIMER)	+= uv_mmtimer.o
 obj-$(CONFIG_IBM_BSR)		+= bsr.o
-obj-$(CONFIG_SGI_MBCS)		+= mbcs.o
 
 obj-$(CONFIG_PRINTER)		+= lp.o
 
diff --git a/drivers/char/agp/Kconfig b/drivers/char/agp/Kconfig
index 6231714ef3c8..812d6aa6e013 100644
--- a/drivers/char/agp/Kconfig
+++ b/drivers/char/agp/Kconfig
@@ -111,14 +111,14 @@ config AGP_VIA
 
 config AGP_I460
 	tristate "Intel 460GX chipset support"
-	depends on AGP && (IA64_DIG || IA64_GENERIC)
+	depends on AGP && IA64
 	help
 	  This option gives you AGP GART support for the Intel 460GX chipset
 	  for IA64 processors.
 
 config AGP_HP_ZX1
 	tristate "HP ZX1 chipset AGP support"
-	depends on AGP && (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC)
+	depends on AGP && IA64
 	help
 	  This option gives you AGP GART support for the HP ZX1 chipset
 	  for IA64 processors.
@@ -150,13 +150,6 @@ config AGP_EFFICEON
 	  This option gives you AGP support for the Transmeta Efficeon
 	  series processors with integrated northbridges.
 
-config AGP_SGI_TIOCA
-        tristate "SGI TIO chipset AGP support"
-        depends on AGP && (IA64_SGI_SN2 || IA64_GENERIC)
-        help
-          This option gives you AGP GART support for the SGI TIO chipset
-          for IA64 processors.
-
 config INTEL_GTT
 	tristate
 	depends on X86 && PCI
diff --git a/drivers/char/agp/Makefile b/drivers/char/agp/Makefile
index 4a786ffd9dee..cb2497d157f6 100644
--- a/drivers/char/agp/Makefile
+++ b/drivers/char/agp/Makefile
@@ -16,7 +16,6 @@ obj-$(CONFIG_AGP_I460)		+= i460-agp.o
 obj-$(CONFIG_AGP_INTEL)		+= intel-agp.o
 obj-$(CONFIG_INTEL_GTT)		+= intel-gtt.o
 obj-$(CONFIG_AGP_NVIDIA)	+= nvidia-agp.o
-obj-$(CONFIG_AGP_SGI_TIOCA)	+= sgi-agp.o
 obj-$(CONFIG_AGP_SIS)		+= sis-agp.o
 obj-$(CONFIG_AGP_SWORKS)	+= sworks-agp.o
 obj-$(CONFIG_AGP_UNINORTH)	+= uninorth-agp.o
diff --git a/drivers/char/agp/sgi-agp.c b/drivers/char/agp/sgi-agp.c
deleted file mode 100644
index e7d5bdc02d93..000000000000
--- a/drivers/char/agp/sgi-agp.c
+++ /dev/null
@@ -1,338 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2003-2005 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-/*
- * SGI TIOCA AGPGART routines.
- *
- */
-
-#include <linux/acpi.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-#include <linux/agp_backend.h>
-#include <asm/sn/addrs.h>
-#include <asm/sn/io.h>
-#include <asm/sn/pcidev.h>
-#include <asm/sn/pcibus_provider_defs.h>
-#include <asm/sn/tioca_provider.h>
-#include "agp.h"
-
-extern int agp_memory_reserved;
-extern uint32_t tioca_gart_found;
-extern struct list_head tioca_list;
-static struct agp_bridge_data **sgi_tioca_agp_bridges;
-
-/*
- * The aperature size and related information is set up at TIOCA init time.
- * Values for this table will be extracted and filled in at
- * sgi_tioca_fetch_size() time.
- */
-
-static struct aper_size_info_fixed sgi_tioca_sizes[] = {
-	{0, 0, 0},
-};
-
-static struct page *sgi_tioca_alloc_page(struct agp_bridge_data *bridge)
-{
-	struct page *page;
-	int nid;
-	struct tioca_kernel *info =
-	    (struct tioca_kernel *)bridge->dev_private_data;
-
-	nid = info->ca_closest_node;
-	page = alloc_pages_node(nid, GFP_KERNEL, 0);
-	if (!page)
-		return NULL;
-
-	get_page(page);
-	atomic_inc(&agp_bridge->current_memory_agp);
-	return page;
-}
-
-/*
- * Flush GART tlb's.  Cannot selectively flush based on memory so the mem
- * arg is ignored.
- */
-
-static void sgi_tioca_tlbflush(struct agp_memory *mem)
-{
-	tioca_tlbflush(mem->bridge->dev_private_data);
-}
-
-/*
- * Given an address of a host physical page, turn it into a valid gart
- * entry.
- */
-static unsigned long
-sgi_tioca_mask_memory(struct agp_bridge_data *bridge, dma_addr_t addr,
-		      int type)
-{
-	return tioca_physpage_to_gart(addr);
-}
-
-static void sgi_tioca_agp_enable(struct agp_bridge_data *bridge, u32 mode)
-{
-	tioca_fastwrite_enable(bridge->dev_private_data);
-}
-
-/*
- * sgi_tioca_configure() doesn't have anything to do since the base CA driver
- * has alreay set up the GART.
- */
-
-static int sgi_tioca_configure(void)
-{
-	return 0;
-}
-
-/*
- * Determine gfx aperature size.  This has already been determined by the
- * CA driver init, so just need to set agp_bridge values accordingly.
- */
-
-static int sgi_tioca_fetch_size(void)
-{
-	struct tioca_kernel *info =
-	    (struct tioca_kernel *)agp_bridge->dev_private_data;
-
-	sgi_tioca_sizes[0].size = info->ca_gfxap_size / MB(1);
-	sgi_tioca_sizes[0].num_entries = info->ca_gfxgart_entries;
-
-	return sgi_tioca_sizes[0].size;
-}
-
-static int sgi_tioca_create_gatt_table(struct agp_bridge_data *bridge)
-{
-	struct tioca_kernel *info =
-	    (struct tioca_kernel *)bridge->dev_private_data;
-
-	bridge->gatt_table_real = (u32 *) info->ca_gfxgart;
-	bridge->gatt_table = bridge->gatt_table_real;
-	bridge->gatt_bus_addr = info->ca_gfxgart_base;
-
-	return 0;
-}
-
-static int sgi_tioca_free_gatt_table(struct agp_bridge_data *bridge)
-{
-	return 0;
-}
-
-static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
-				   int type)
-{
-	int num_entries;
-	size_t i;
-	off_t j;
-	void *temp;
-	struct agp_bridge_data *bridge;
-	u64 *table;
-
-	bridge = mem->bridge;
-	if (!bridge)
-		return -EINVAL;
-
-	table = (u64 *)bridge->gatt_table;
-
-	temp = bridge->current_size;
-
-	switch (bridge->driver->size_type) {
-	case U8_APER_SIZE:
-		num_entries = A_SIZE_8(temp)->num_entries;
-		break;
-	case U16_APER_SIZE:
-		num_entries = A_SIZE_16(temp)->num_entries;
-		break;
-	case U32_APER_SIZE:
-		num_entries = A_SIZE_32(temp)->num_entries;
-		break;
-	case FIXED_APER_SIZE:
-		num_entries = A_SIZE_FIX(temp)->num_entries;
-		break;
-	case LVL2_APER_SIZE:
-		return -EINVAL;
-	default:
-		num_entries = 0;
-		break;
-	}
-
-	num_entries -= agp_memory_reserved / PAGE_SIZE;
-	if (num_entries < 0)
-		num_entries = 0;
-
-	if (type != 0 || mem->type != 0) {
-		return -EINVAL;
-	}
-
-	if ((pg_start + mem->page_count) > num_entries)
-		return -EINVAL;
-
-	j = pg_start;
-
-	while (j < (pg_start + mem->page_count)) {
-		if (table[j])
-			return -EBUSY;
-		j++;
-	}
-
-	if (!mem->is_flushed) {
-		bridge->driver->cache_flush();
-		mem->is_flushed = true;
-	}
-
-	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
-		table[j] =
-		    bridge->driver->mask_memory(bridge,
-						page_to_phys(mem->pages[i]),
-						mem->type);
-	}
-
-	bridge->driver->tlb_flush(mem);
-	return 0;
-}
-
-static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start,
-				   int type)
-{
-	size_t i;
-	struct agp_bridge_data *bridge;
-	u64 *table;
-
-	bridge = mem->bridge;
-	if (!bridge)
-		return -EINVAL;
-
-	if (type != 0 || mem->type != 0) {
-		return -EINVAL;
-	}
-
-	table = (u64 *)bridge->gatt_table;
-
-	for (i = pg_start; i < (mem->page_count + pg_start); i++) {
-		table[i] = 0;
-	}
-
-	bridge->driver->tlb_flush(mem);
-	return 0;
-}
-
-static void sgi_tioca_cache_flush(void)
-{
-}
-
-/*
- * Cleanup.  Nothing to do as the CA driver owns the GART.
- */
-
-static void sgi_tioca_cleanup(void)
-{
-}
-
-static struct agp_bridge_data *sgi_tioca_find_bridge(struct pci_dev *pdev)
-{
-	struct agp_bridge_data *bridge;
-
-	list_for_each_entry(bridge, &agp_bridges, list) {
-		if (bridge->dev->bus == pdev->bus)
-			break;
-	}
-	return bridge;
-}
-
-const struct agp_bridge_driver sgi_tioca_driver = {
-	.owner = THIS_MODULE,
-	.size_type = U16_APER_SIZE,
-	.configure = sgi_tioca_configure,
-	.fetch_size = sgi_tioca_fetch_size,
-	.cleanup = sgi_tioca_cleanup,
-	.tlb_flush = sgi_tioca_tlbflush,
-	.mask_memory = sgi_tioca_mask_memory,
-	.agp_enable = sgi_tioca_agp_enable,
-	.cache_flush = sgi_tioca_cache_flush,
-	.create_gatt_table = sgi_tioca_create_gatt_table,
-	.free_gatt_table = sgi_tioca_free_gatt_table,
-	.insert_memory = sgi_tioca_insert_memory,
-	.remove_memory = sgi_tioca_remove_memory,
-	.alloc_by_type = agp_generic_alloc_by_type,
-	.free_by_type = agp_generic_free_by_type,
-	.agp_alloc_page = sgi_tioca_alloc_page,
-	.agp_destroy_page = agp_generic_destroy_page,
-	.agp_type_to_mask_type  = agp_generic_type_to_mask_type,
-	.cant_use_aperture = true,
-	.needs_scratch_page = false,
-	.num_aperture_sizes = 1,
-};
-
-static int agp_sgi_init(void)
-{
-	unsigned int j;
-	struct tioca_kernel *info;
-	struct pci_dev *pdev = NULL;
-
-	if (tioca_gart_found)
-		printk(KERN_INFO PFX "SGI TIO CA GART driver initialized.\n");
-	else
-		return 0;
-
-	sgi_tioca_agp_bridges = kmalloc_array(tioca_gart_found,
-					      sizeof(struct agp_bridge_data *),
-					      GFP_KERNEL);
-	if (!sgi_tioca_agp_bridges)
-		return -ENOMEM;
-
-	j = 0;
-	list_for_each_entry(info, &tioca_list, ca_list) {
-		if (list_empty(info->ca_devices))
-			continue;
-		list_for_each_entry(pdev, info->ca_devices, bus_list) {
-			u8 cap_ptr;
-
-			if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8))
-				continue;
-			cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
-			if (!cap_ptr)
-				continue;
-		}
-		sgi_tioca_agp_bridges[j] = agp_alloc_bridge();
-		printk(KERN_INFO PFX "bridge %d = 0x%p\n", j,
-		       sgi_tioca_agp_bridges[j]);
-		if (sgi_tioca_agp_bridges[j]) {
-			sgi_tioca_agp_bridges[j]->dev = pdev;
-			sgi_tioca_agp_bridges[j]->dev_private_data = info;
-			sgi_tioca_agp_bridges[j]->driver = &sgi_tioca_driver;
-			sgi_tioca_agp_bridges[j]->gart_bus_addr =
-			    info->ca_gfxap_base;
-			sgi_tioca_agp_bridges[j]->mode = (0x7D << 24) |	/* 126 requests */
-			    (0x1 << 9) |	/* SBA supported */
-			    (0x1 << 5) |	/* 64-bit addresses supported */
-			    (0x1 << 4) |	/* FW supported */
-			    (0x1 << 3) |	/* AGP 3.0 mode */
-			    0x2;	/* 8x transfer only */
-			sgi_tioca_agp_bridges[j]->current_size =
-			    sgi_tioca_agp_bridges[j]->previous_size =
-			    (void *)&sgi_tioca_sizes[0];
-			agp_add_bridge(sgi_tioca_agp_bridges[j]);
-		}
-		j++;
-	}
-
-	agp_find_bridge = &sgi_tioca_find_bridge;
-	return 0;
-}
-
-static void agp_sgi_cleanup(void)
-{
-	kfree(sgi_tioca_agp_bridges);
-	sgi_tioca_agp_bridges = NULL;
-}
-
-module_init(agp_sgi_init);
-module_exit(agp_sgi_cleanup);
-
-MODULE_LICENSE("GPL and additional rights");
diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c
deleted file mode 100644
index 0a31b60bee7b..000000000000
--- a/drivers/char/mbcs.c
+++ /dev/null
@@ -1,831 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2005 Silicon Graphics, Inc.  All rights reserved.
- */
-
-/*
- *	MOATB Core Services driver.
- */
-
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/ioport.h>
-#include <linux/kernel.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/mm.h>
-#include <linux/uio.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <asm/io.h>
-#include <linux/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/sn/addrs.h>
-#include <asm/sn/intr.h>
-#include <asm/sn/tiocx.h>
-#include "mbcs.h"
-
-#define MBCS_DEBUG 0
-#if MBCS_DEBUG
-#define DBG(fmt...)    printk(KERN_ALERT fmt)
-#else
-#define DBG(fmt...)
-#endif
-static DEFINE_MUTEX(mbcs_mutex);
-static int mbcs_major;
-
-static LIST_HEAD(soft_list);
-
-/*
- * file operations
- */
-static const struct file_operations mbcs_ops = {
-	.owner = THIS_MODULE,
-	.open = mbcs_open,
-	.llseek = mbcs_sram_llseek,
-	.read = mbcs_sram_read,
-	.write = mbcs_sram_write,
-	.mmap = mbcs_gscr_mmap,
-};
-
-struct mbcs_callback_arg {
-	int minor;
-	struct cx_dev *cx_dev;
-};
-
-static inline void mbcs_getdma_init(struct getdma *gdma)
-{
-	memset(gdma, 0, sizeof(struct getdma));
-	gdma->DoneIntEnable = 1;
-}
-
-static inline void mbcs_putdma_init(struct putdma *pdma)
-{
-	memset(pdma, 0, sizeof(struct putdma));
-	pdma->DoneIntEnable = 1;
-}
-
-static inline void mbcs_algo_init(struct algoblock *algo_soft)
-{
-	memset(algo_soft, 0, sizeof(struct algoblock));
-}
-
-static inline void mbcs_getdma_set(void *mmr,
-		       uint64_t hostAddr,
-		       uint64_t localAddr,
-		       uint64_t localRamSel,
-		       uint64_t numPkts,
-		       uint64_t amoEnable,
-		       uint64_t intrEnable,
-		       uint64_t peerIO,
-		       uint64_t amoHostDest,
-		       uint64_t amoModType, uint64_t intrHostDest,
-		       uint64_t intrVector)
-{
-	union dma_control rdma_control;
-	union dma_amo_dest amo_dest;
-	union intr_dest intr_dest;
-	union dma_localaddr local_addr;
-	union dma_hostaddr host_addr;
-
-	rdma_control.dma_control_reg = 0;
-	amo_dest.dma_amo_dest_reg = 0;
-	intr_dest.intr_dest_reg = 0;
-	local_addr.dma_localaddr_reg = 0;
-	host_addr.dma_hostaddr_reg = 0;
-
-	host_addr.dma_sys_addr = hostAddr;
-	MBCS_MMR_SET(mmr, MBCS_RD_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg);
-
-	local_addr.dma_ram_addr = localAddr;
-	local_addr.dma_ram_sel = localRamSel;
-	MBCS_MMR_SET(mmr, MBCS_RD_DMA_LOC_ADDR, local_addr.dma_localaddr_reg);
-
-	rdma_control.dma_op_length = numPkts;
-	rdma_control.done_amo_en = amoEnable;
-	rdma_control.done_int_en = intrEnable;
-	rdma_control.pio_mem_n = peerIO;
-	MBCS_MMR_SET(mmr, MBCS_RD_DMA_CTRL, rdma_control.dma_control_reg);
-
-	amo_dest.dma_amo_sys_addr = amoHostDest;
-	amo_dest.dma_amo_mod_type = amoModType;
-	MBCS_MMR_SET(mmr, MBCS_RD_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg);
-
-	intr_dest.address = intrHostDest;
-	intr_dest.int_vector = intrVector;
-	MBCS_MMR_SET(mmr, MBCS_RD_DMA_INT_DEST, intr_dest.intr_dest_reg);
-
-}
-
-static inline void mbcs_putdma_set(void *mmr,
-		       uint64_t hostAddr,
-		       uint64_t localAddr,
-		       uint64_t localRamSel,
-		       uint64_t numPkts,
-		       uint64_t amoEnable,
-		       uint64_t intrEnable,
-		       uint64_t peerIO,
-		       uint64_t amoHostDest,
-		       uint64_t amoModType,
-		       uint64_t intrHostDest, uint64_t intrVector)
-{
-	union dma_control wdma_control;
-	union dma_amo_dest amo_dest;
-	union intr_dest intr_dest;
-	union dma_localaddr local_addr;
-	union dma_hostaddr host_addr;
-
-	wdma_control.dma_control_reg = 0;
-	amo_dest.dma_amo_dest_reg = 0;
-	intr_dest.intr_dest_reg = 0;
-	local_addr.dma_localaddr_reg = 0;
-	host_addr.dma_hostaddr_reg = 0;
-
-	host_addr.dma_sys_addr = hostAddr;
-	MBCS_MMR_SET(mmr, MBCS_WR_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg);
-
-	local_addr.dma_ram_addr = localAddr;
-	local_addr.dma_ram_sel = localRamSel;
-	MBCS_MMR_SET(mmr, MBCS_WR_DMA_LOC_ADDR, local_addr.dma_localaddr_reg);
-
-	wdma_control.dma_op_length = numPkts;
-	wdma_control.done_amo_en = amoEnable;
-	wdma_control.done_int_en = intrEnable;
-	wdma_control.pio_mem_n = peerIO;
-	MBCS_MMR_SET(mmr, MBCS_WR_DMA_CTRL, wdma_control.dma_control_reg);
-
-	amo_dest.dma_amo_sys_addr = amoHostDest;
-	amo_dest.dma_amo_mod_type = amoModType;
-	MBCS_MMR_SET(mmr, MBCS_WR_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg);
-
-	intr_dest.address = intrHostDest;
-	intr_dest.int_vector = intrVector;
-	MBCS_MMR_SET(mmr, MBCS_WR_DMA_INT_DEST, intr_dest.intr_dest_reg);
-
-}
-
-static inline void mbcs_algo_set(void *mmr,
-		     uint64_t amoHostDest,
-		     uint64_t amoModType,
-		     uint64_t intrHostDest,
-		     uint64_t intrVector, uint64_t algoStepCount)
-{
-	union dma_amo_dest amo_dest;
-	union intr_dest intr_dest;
-	union algo_step step;
-
-	step.algo_step_reg = 0;
-	intr_dest.intr_dest_reg = 0;
-	amo_dest.dma_amo_dest_reg = 0;
-
-	amo_dest.dma_amo_sys_addr = amoHostDest;
-	amo_dest.dma_amo_mod_type = amoModType;
-	MBCS_MMR_SET(mmr, MBCS_ALG_AMO_DEST, amo_dest.dma_amo_dest_reg);
-
-	intr_dest.address = intrHostDest;
-	intr_dest.int_vector = intrVector;
-	MBCS_MMR_SET(mmr, MBCS_ALG_INT_DEST, intr_dest.intr_dest_reg);
-
-	step.alg_step_cnt = algoStepCount;
-	MBCS_MMR_SET(mmr, MBCS_ALG_STEP, step.algo_step_reg);
-}
-
-static inline int mbcs_getdma_start(struct mbcs_soft *soft)
-{
-	void *mmr_base;
-	struct getdma *gdma;
-	uint64_t numPkts;
-	union cm_control cm_control;
-
-	mmr_base = soft->mmr_base;
-	gdma = &soft->getdma;
-
-	/* check that host address got setup */
-	if (!gdma->hostAddr)
-		return -1;
-
-	numPkts =
-	    (gdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE;
-
-	/* program engine */
-	mbcs_getdma_set(mmr_base, tiocx_dma_addr(gdma->hostAddr),
-		   gdma->localAddr,
-		   (gdma->localAddr < MB2) ? 0 :
-		   (gdma->localAddr < MB4) ? 1 :
-		   (gdma->localAddr < MB6) ? 2 : 3,
-		   numPkts,
-		   gdma->DoneAmoEnable,
-		   gdma->DoneIntEnable,
-		   gdma->peerIO,
-		   gdma->amoHostDest,
-		   gdma->amoModType,
-		   gdma->intrHostDest, gdma->intrVector);
-
-	/* start engine */
-	cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
-	cm_control.rd_dma_go = 1;
-	MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
-
-	return 0;
-
-}
-
-static inline int mbcs_putdma_start(struct mbcs_soft *soft)
-{
-	void *mmr_base;
-	struct putdma *pdma;
-	uint64_t numPkts;
-	union cm_control cm_control;
-
-	mmr_base = soft->mmr_base;
-	pdma = &soft->putdma;
-
-	/* check that host address got setup */
-	if (!pdma->hostAddr)
-		return -1;
-
-	numPkts =
-	    (pdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE;
-
-	/* program engine */
-	mbcs_putdma_set(mmr_base, tiocx_dma_addr(pdma->hostAddr),
-		   pdma->localAddr,
-		   (pdma->localAddr < MB2) ? 0 :
-		   (pdma->localAddr < MB4) ? 1 :
-		   (pdma->localAddr < MB6) ? 2 : 3,
-		   numPkts,
-		   pdma->DoneAmoEnable,
-		   pdma->DoneIntEnable,
-		   pdma->peerIO,
-		   pdma->amoHostDest,
-		   pdma->amoModType,
-		   pdma->intrHostDest, pdma->intrVector);
-
-	/* start engine */
-	cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
-	cm_control.wr_dma_go = 1;
-	MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
-
-	return 0;
-
-}
-
-static inline int mbcs_algo_start(struct mbcs_soft *soft)
-{
-	struct algoblock *algo_soft = &soft->algo;
-	void *mmr_base = soft->mmr_base;
-	union cm_control cm_control;
-
-	if (mutex_lock_interruptible(&soft->algolock))
-		return -ERESTARTSYS;
-
-	atomic_set(&soft->algo_done, 0);
-
-	mbcs_algo_set(mmr_base,
-		 algo_soft->amoHostDest,
-		 algo_soft->amoModType,
-		 algo_soft->intrHostDest,
-		 algo_soft->intrVector, algo_soft->algoStepCount);
-
-	/* start algorithm */
-	cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
-	cm_control.alg_done_int_en = 1;
-	cm_control.alg_go = 1;
-	MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
-
-	mutex_unlock(&soft->algolock);
-
-	return 0;
-}
-
-static inline ssize_t
-do_mbcs_sram_dmawrite(struct mbcs_soft *soft, uint64_t hostAddr,
-		      size_t len, loff_t * off)
-{
-	int rv = 0;
-
-	if (mutex_lock_interruptible(&soft->dmawritelock))
-		return -ERESTARTSYS;
-
-	atomic_set(&soft->dmawrite_done, 0);
-
-	soft->putdma.hostAddr = hostAddr;
-	soft->putdma.localAddr = *off;
-	soft->putdma.bytes = len;
-
-	if (mbcs_putdma_start(soft) < 0) {
-		DBG(KERN_ALERT "do_mbcs_sram_dmawrite: "
-					"mbcs_putdma_start failed\n");
-		rv = -EAGAIN;
-		goto dmawrite_exit;
-	}
-
-	if (wait_event_interruptible(soft->dmawrite_queue,
-					atomic_read(&soft->dmawrite_done))) {
-		rv = -ERESTARTSYS;
-		goto dmawrite_exit;
-	}
-
-	rv = len;
-	*off += len;
-
-dmawrite_exit:
-	mutex_unlock(&soft->dmawritelock);
-
-	return rv;
-}
-
-static inline ssize_t
-do_mbcs_sram_dmaread(struct mbcs_soft *soft, uint64_t hostAddr,
-		     size_t len, loff_t * off)
-{
-	int rv = 0;
-
-	if (mutex_lock_interruptible(&soft->dmareadlock))
-		return -ERESTARTSYS;
-
-	atomic_set(&soft->dmawrite_done, 0);
-
-	soft->getdma.hostAddr = hostAddr;
-	soft->getdma.localAddr = *off;
-	soft->getdma.bytes = len;
-
-	if (mbcs_getdma_start(soft) < 0) {
-		DBG(KERN_ALERT "mbcs_strategy: mbcs_getdma_start failed\n");
-		rv = -EAGAIN;
-		goto dmaread_exit;
-	}
-
-	if (wait_event_interruptible(soft->dmaread_queue,
-					atomic_read(&soft->dmaread_done))) {
-		rv = -ERESTARTSYS;
-		goto dmaread_exit;
-	}
-
-	rv = len;
-	*off += len;
-
-dmaread_exit:
-	mutex_unlock(&soft->dmareadlock);
-
-	return rv;
-}
-
-static int mbcs_open(struct inode *ip, struct file *fp)
-{
-	struct mbcs_soft *soft;
-	int minor;
-
-	mutex_lock(&mbcs_mutex);
-	minor = iminor(ip);
-
-	/* Nothing protects access to this list... */
-	list_for_each_entry(soft, &soft_list, list) {
-		if (soft->nasid == minor) {
-			fp->private_data = soft->cxdev;
-			mutex_unlock(&mbcs_mutex);
-			return 0;
-		}
-	}
-
-	mutex_unlock(&mbcs_mutex);
-	return -ENODEV;
-}
-
-static ssize_t mbcs_sram_read(struct file * fp, char __user *buf, size_t len, loff_t * off)
-{
-	struct cx_dev *cx_dev = fp->private_data;
-	struct mbcs_soft *soft = cx_dev->soft;
-	uint64_t hostAddr;
-	int rv = 0;
-
-	hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len));
-	if (hostAddr == 0)
-		return -ENOMEM;
-
-	rv = do_mbcs_sram_dmawrite(soft, hostAddr, len, off);
-	if (rv < 0)
-		goto exit;
-
-	if (copy_to_user(buf, (void *)hostAddr, len))
-		rv = -EFAULT;
-
-      exit:
-	free_pages(hostAddr, get_order(len));
-
-	return rv;
-}
-
-static ssize_t
-mbcs_sram_write(struct file * fp, const char __user *buf, size_t len, loff_t * off)
-{
-	struct cx_dev *cx_dev = fp->private_data;
-	struct mbcs_soft *soft = cx_dev->soft;
-	uint64_t hostAddr;
-	int rv = 0;
-
-	hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len));
-	if (hostAddr == 0)
-		return -ENOMEM;
-
-	if (copy_from_user((void *)hostAddr, buf, len)) {
-		rv = -EFAULT;
-		goto exit;
-	}
-
-	rv = do_mbcs_sram_dmaread(soft, hostAddr, len, off);
-
-      exit:
-	free_pages(hostAddr, get_order(len));
-
-	return rv;
-}
-
-static loff_t mbcs_sram_llseek(struct file * filp, loff_t off, int whence)
-{
-	return generic_file_llseek_size(filp, off, whence, MAX_LFS_FILESIZE,
-					MBCS_SRAM_SIZE);
-}
-
-static uint64_t mbcs_pioaddr(struct mbcs_soft *soft, uint64_t offset)
-{
-	uint64_t mmr_base;
-
-	mmr_base = (uint64_t) (soft->mmr_base + offset);
-
-	return mmr_base;
-}
-
-static void mbcs_debug_pioaddr_set(struct mbcs_soft *soft)
-{
-	soft->debug_addr = mbcs_pioaddr(soft, MBCS_DEBUG_START);
-}
-
-static void mbcs_gscr_pioaddr_set(struct mbcs_soft *soft)
-{
-	soft->gscr_addr = mbcs_pioaddr(soft, MBCS_GSCR_START);
-}
-
-static int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma)
-{
-	struct cx_dev *cx_dev = fp->private_data;
-	struct mbcs_soft *soft = cx_dev->soft;
-
-	if (vma->vm_pgoff != 0)
-		return -EINVAL;
-
-	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
-	/* Remap-pfn-range will mark the range VM_IO */
-	if (remap_pfn_range(vma,
-			    vma->vm_start,
-			    __pa(soft->gscr_addr) >> PAGE_SHIFT,
-			    PAGE_SIZE,
-			    vma->vm_page_prot))
-		return -EAGAIN;
-
-	return 0;
-}
-
-/**
- * mbcs_completion_intr_handler - Primary completion handler.
- * @irq: irq
- * @arg: soft struct for device
- *
- */
-static irqreturn_t
-mbcs_completion_intr_handler(int irq, void *arg)
-{
-	struct mbcs_soft *soft = (struct mbcs_soft *)arg;
-	void *mmr_base;
-	union cm_status cm_status;
-	union cm_control cm_control;
-
-	mmr_base = soft->mmr_base;
-	cm_status.cm_status_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_STATUS);
-
-	if (cm_status.rd_dma_done) {
-		/* stop dma-read engine, clear status */
-		cm_control.cm_control_reg =
-		    MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
-		cm_control.rd_dma_clr = 1;
-		MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
-			     cm_control.cm_control_reg);
-		atomic_set(&soft->dmaread_done, 1);
-		wake_up(&soft->dmaread_queue);
-	}
-	if (cm_status.wr_dma_done) {
-		/* stop dma-write engine, clear status */
-		cm_control.cm_control_reg =
-		    MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
-		cm_control.wr_dma_clr = 1;
-		MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
-			     cm_control.cm_control_reg);
-		atomic_set(&soft->dmawrite_done, 1);
-		wake_up(&soft->dmawrite_queue);
-	}
-	if (cm_status.alg_done) {
-		/* clear status */
-		cm_control.cm_control_reg =
-		    MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
-		cm_control.alg_done_clr = 1;
-		MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
-			     cm_control.cm_control_reg);
-		atomic_set(&soft->algo_done, 1);
-		wake_up(&soft->algo_queue);
-	}
-
-	return IRQ_HANDLED;
-}
-
-/**
- * mbcs_intr_alloc - Allocate interrupts.
- * @dev: device pointer
- *
- */
-static int mbcs_intr_alloc(struct cx_dev *dev)
-{
-	struct sn_irq_info *sn_irq;
-	struct mbcs_soft *soft;
-	struct getdma *getdma;
-	struct putdma *putdma;
-	struct algoblock *algo;
-
-	soft = dev->soft;
-	getdma = &soft->getdma;
-	putdma = &soft->putdma;
-	algo = &soft->algo;
-
-	soft->get_sn_irq = NULL;
-	soft->put_sn_irq = NULL;
-	soft->algo_sn_irq = NULL;
-
-	sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
-	if (sn_irq == NULL)
-		return -EAGAIN;
-	soft->get_sn_irq = sn_irq;
-	getdma->intrHostDest = sn_irq->irq_xtalkaddr;
-	getdma->intrVector = sn_irq->irq_irq;
-	if (request_irq(sn_irq->irq_irq,
-			(void *)mbcs_completion_intr_handler, IRQF_SHARED,
-			"MBCS get intr", (void *)soft)) {
-		tiocx_irq_free(soft->get_sn_irq);
-		return -EAGAIN;
-	}
-
-	sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
-	if (sn_irq == NULL) {
-		free_irq(soft->get_sn_irq->irq_irq, soft);
-		tiocx_irq_free(soft->get_sn_irq);
-		return -EAGAIN;
-	}
-	soft->put_sn_irq = sn_irq;
-	putdma->intrHostDest = sn_irq->irq_xtalkaddr;
-	putdma->intrVector = sn_irq->irq_irq;
-	if (request_irq(sn_irq->irq_irq,
-			(void *)mbcs_completion_intr_handler, IRQF_SHARED,
-			"MBCS put intr", (void *)soft)) {
-		tiocx_irq_free(soft->put_sn_irq);
-		free_irq(soft->get_sn_irq->irq_irq, soft);
-		tiocx_irq_free(soft->get_sn_irq);
-		return -EAGAIN;
-	}
-
-	sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
-	if (sn_irq == NULL) {
-		free_irq(soft->put_sn_irq->irq_irq, soft);
-		tiocx_irq_free(soft->put_sn_irq);
-		free_irq(soft->get_sn_irq->irq_irq, soft);
-		tiocx_irq_free(soft->get_sn_irq);
-		return -EAGAIN;
-	}
-	soft->algo_sn_irq = sn_irq;
-	algo->intrHostDest = sn_irq->irq_xtalkaddr;
-	algo->intrVector = sn_irq->irq_irq;
-	if (request_irq(sn_irq->irq_irq,
-			(void *)mbcs_completion_intr_handler, IRQF_SHARED,
-			"MBCS algo intr", (void *)soft)) {
-		tiocx_irq_free(soft->algo_sn_irq);
-		free_irq(soft->put_sn_irq->irq_irq, soft);
-		tiocx_irq_free(soft->put_sn_irq);
-		free_irq(soft->get_sn_irq->irq_irq, soft);
-		tiocx_irq_free(soft->get_sn_irq);
-		return -EAGAIN;
-	}
-
-	return 0;
-}
-
-/**
- * mbcs_intr_dealloc - Remove interrupts.
- * @dev: device pointer
- *
- */
-static void mbcs_intr_dealloc(struct cx_dev *dev)
-{
-	struct mbcs_soft *soft;
-
-	soft = dev->soft;
-
-	free_irq(soft->get_sn_irq->irq_irq, soft);
-	tiocx_irq_free(soft->get_sn_irq);
-	free_irq(soft->put_sn_irq->irq_irq, soft);
-	tiocx_irq_free(soft->put_sn_irq);
-	free_irq(soft->algo_sn_irq->irq_irq, soft);
-	tiocx_irq_free(soft->algo_sn_irq);
-}
-
-static inline int mbcs_hw_init(struct mbcs_soft *soft)
-{
-	void *mmr_base = soft->mmr_base;
-	union cm_control cm_control;
-	union cm_req_timeout cm_req_timeout;
-	uint64_t err_stat;
-
-	cm_req_timeout.cm_req_timeout_reg =
-	    MBCS_MMR_GET(mmr_base, MBCS_CM_REQ_TOUT);
-
-	cm_req_timeout.time_out = MBCS_CM_CONTROL_REQ_TOUT_MASK;
-	MBCS_MMR_SET(mmr_base, MBCS_CM_REQ_TOUT,
-		     cm_req_timeout.cm_req_timeout_reg);
-
-	mbcs_gscr_pioaddr_set(soft);
-	mbcs_debug_pioaddr_set(soft);
-
-	/* clear errors */
-	err_stat = MBCS_MMR_GET(mmr_base, MBCS_CM_ERR_STAT);
-	MBCS_MMR_SET(mmr_base, MBCS_CM_CLR_ERR_STAT, err_stat);
-	MBCS_MMR_ZERO(mmr_base, MBCS_CM_ERROR_DETAIL1);
-
-	/* enable interrupts */
-	/* turn off 2^23 (INT_EN_PIO_REQ_ADDR_INV) */
-	MBCS_MMR_SET(mmr_base, MBCS_CM_ERR_INT_EN, 0x3ffffff7e00ffUL);
-
-	/* arm status regs and clear engines */
-	cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
-	cm_control.rearm_stat_regs = 1;
-	cm_control.alg_clr = 1;
-	cm_control.wr_dma_clr = 1;
-	cm_control.rd_dma_clr = 1;
-
-	MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
-
-	return 0;
-}
-
-static ssize_t show_algo(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct cx_dev *cx_dev = to_cx_dev(dev);
-	struct mbcs_soft *soft = cx_dev->soft;
-	uint64_t debug0;
-
-	/*
-	 * By convention, the first debug register contains the
-	 * algorithm number and revision.
-	 */
-	debug0 = *(uint64_t *) soft->debug_addr;
-
-	return sprintf(buf, "0x%x 0x%x\n",
-		       upper_32_bits(debug0), lower_32_bits(debug0));
-}
-
-static ssize_t store_algo(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
-	int n;
-	struct cx_dev *cx_dev = to_cx_dev(dev);
-	struct mbcs_soft *soft = cx_dev->soft;
-
-	if (count <= 0)
-		return 0;
-
-	n = simple_strtoul(buf, NULL, 0);
-
-	if (n == 1) {
-		mbcs_algo_start(soft);
-		if (wait_event_interruptible(soft->algo_queue,
-					atomic_read(&soft->algo_done)))
-			return -ERESTARTSYS;
-	}
-
-	return count;
-}
-
-DEVICE_ATTR(algo, 0644, show_algo, store_algo);
-
-/**
- * mbcs_probe - Initialize for device
- * @dev: device pointer
- * @device_id: id table pointer
- *
- */
-static int mbcs_probe(struct cx_dev *dev, const struct cx_device_id *id)
-{
-	struct mbcs_soft *soft;
-
-	dev->soft = NULL;
-
-	soft = kzalloc(sizeof(struct mbcs_soft), GFP_KERNEL);
-	if (soft == NULL)
-		return -ENOMEM;
-
-	soft->nasid = dev->cx_id.nasid;
-	list_add(&soft->list, &soft_list);
-	soft->mmr_base = (void *)tiocx_swin_base(dev->cx_id.nasid);
-	dev->soft = soft;
-	soft->cxdev = dev;
-
-	init_waitqueue_head(&soft->dmawrite_queue);
-	init_waitqueue_head(&soft->dmaread_queue);
-	init_waitqueue_head(&soft->algo_queue);
-
-	mutex_init(&soft->dmawritelock);
-	mutex_init(&soft->dmareadlock);
-	mutex_init(&soft->algolock);
-
-	mbcs_getdma_init(&soft->getdma);
-	mbcs_putdma_init(&soft->putdma);
-	mbcs_algo_init(&soft->algo);
-
-	mbcs_hw_init(soft);
-
-	/* Allocate interrupts */
-	mbcs_intr_alloc(dev);
-
-	device_create_file(&dev->dev, &dev_attr_algo);
-
-	return 0;
-}
-
-static int mbcs_remove(struct cx_dev *dev)
-{
-	if (dev->soft) {
-		mbcs_intr_dealloc(dev);
-		kfree(dev->soft);
-	}
-
-	device_remove_file(&dev->dev, &dev_attr_algo);
-
-	return 0;
-}
-
-static const struct cx_device_id mbcs_id_table[] = {
-	{
-	 .part_num = MBCS_PART_NUM,
-	 .mfg_num = MBCS_MFG_NUM,
-	 },
-	{
-	 .part_num = MBCS_PART_NUM_ALG0,
-	 .mfg_num = MBCS_MFG_NUM,
-	 },
-	{0, 0}
-};
-
-MODULE_DEVICE_TABLE(cx, mbcs_id_table);
-
-static struct cx_drv mbcs_driver = {
-	.name = DEVICE_NAME,
-	.id_table = mbcs_id_table,
-	.probe = mbcs_probe,
-	.remove = mbcs_remove,
-};
-
-static void __exit mbcs_exit(void)
-{
-	unregister_chrdev(mbcs_major, DEVICE_NAME);
-	cx_driver_unregister(&mbcs_driver);
-}
-
-static int __init mbcs_init(void)
-{
-	int rv;
-
-	if (!ia64_platform_is("sn2"))
-		return -ENODEV;
-
-	// Put driver into chrdevs[].  Get major number.
-	rv = register_chrdev(mbcs_major, DEVICE_NAME, &mbcs_ops);
-	if (rv < 0) {
-		DBG(KERN_ALERT "mbcs_init: can't get major number. %d\n", rv);
-		return rv;
-	}
-	mbcs_major = rv;
-
-	return cx_driver_register(&mbcs_driver);
-}
-
-module_init(mbcs_init);
-module_exit(mbcs_exit);
-
-MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>");
-MODULE_DESCRIPTION("Driver for MOATB Core Services");
-MODULE_LICENSE("GPL");
diff --git a/drivers/char/mbcs.h b/drivers/char/mbcs.h
deleted file mode 100644
index 1a36884c48b5..000000000000
--- a/drivers/char/mbcs.h
+++ /dev/null
@@ -1,553 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2005 Silicon Graphics, Inc.  All rights reserved.
- */
-
-#ifndef __MBCS_H__
-#define __MBCS_H__
-
-/*
- * General macros
- */
-#define MB	(1024*1024)
-#define MB2	(2*MB)
-#define MB4	(4*MB)
-#define MB6	(6*MB)
-
-/*
- * Offsets and masks
- */
-#define MBCS_CM_ID		0x0000	/* Identification */
-#define MBCS_CM_STATUS		0x0008	/* Status */
-#define MBCS_CM_ERROR_DETAIL1	0x0010	/* Error Detail1 */
-#define MBCS_CM_ERROR_DETAIL2	0x0018	/* Error Detail2 */
-#define MBCS_CM_CONTROL		0x0020	/* Control */
-#define MBCS_CM_REQ_TOUT	0x0028	/* Request Time-out */
-#define MBCS_CM_ERR_INT_DEST	0x0038	/* Error Interrupt Destination */
-#define MBCS_CM_TARG_FL		0x0050	/* Target Flush */
-#define MBCS_CM_ERR_STAT	0x0060	/* Error Status */
-#define MBCS_CM_CLR_ERR_STAT	0x0068	/* Clear Error Status */
-#define MBCS_CM_ERR_INT_EN	0x0070	/* Error Interrupt Enable */
-#define MBCS_RD_DMA_SYS_ADDR	0x0100	/* Read DMA System Address */
-#define MBCS_RD_DMA_LOC_ADDR	0x0108	/* Read DMA Local Address */
-#define MBCS_RD_DMA_CTRL	0x0110	/* Read DMA Control */
-#define MBCS_RD_DMA_AMO_DEST	0x0118	/* Read DMA AMO Destination */
-#define MBCS_RD_DMA_INT_DEST	0x0120	/* Read DMA Interrupt Destination */
-#define MBCS_RD_DMA_AUX_STAT	0x0130	/* Read DMA Auxiliary Status */
-#define MBCS_WR_DMA_SYS_ADDR	0x0200	/* Write DMA System Address */
-#define MBCS_WR_DMA_LOC_ADDR	0x0208	/* Write DMA Local Address */
-#define MBCS_WR_DMA_CTRL	0x0210	/* Write DMA Control */
-#define MBCS_WR_DMA_AMO_DEST	0x0218	/* Write DMA AMO Destination */
-#define MBCS_WR_DMA_INT_DEST	0x0220	/* Write DMA Interrupt Destination */
-#define MBCS_WR_DMA_AUX_STAT	0x0230	/* Write DMA Auxiliary Status */
-#define MBCS_ALG_AMO_DEST	0x0300	/* Algorithm AMO Destination */
-#define MBCS_ALG_INT_DEST	0x0308	/* Algorithm Interrupt Destination */
-#define MBCS_ALG_OFFSETS	0x0310
-#define MBCS_ALG_STEP		0x0318	/* Algorithm Step */
-
-#define MBCS_GSCR_START		0x0000000
-#define MBCS_DEBUG_START	0x0100000
-#define MBCS_RAM0_START		0x0200000
-#define MBCS_RAM1_START		0x0400000
-#define MBCS_RAM2_START		0x0600000
-
-#define MBCS_CM_CONTROL_REQ_TOUT_MASK 0x0000000000ffffffUL
-//#define PIO_BASE_ADDR_BASE_OFFSET_MASK 0x00fffffffff00000UL
-
-#define MBCS_SRAM_SIZE		(1024*1024)
-#define MBCS_CACHELINE_SIZE	128
-
-/*
- * MMR get's and put's
- */
-#define MBCS_MMR_ADDR(mmr_base, offset)((uint64_t *)(mmr_base + offset))
-#define MBCS_MMR_SET(mmr_base, offset, value) {			\
-	uint64_t *mbcs_mmr_set_u64p, readback;				\
-	mbcs_mmr_set_u64p = (uint64_t *)(mmr_base + offset);	\
-	*mbcs_mmr_set_u64p = value;					\
-	readback = *mbcs_mmr_set_u64p; \
-}
-#define MBCS_MMR_GET(mmr_base, offset) *(uint64_t *)(mmr_base + offset)
-#define MBCS_MMR_ZERO(mmr_base, offset) MBCS_MMR_SET(mmr_base, offset, 0)
-
-/*
- * MBCS mmr structures
- */
-union cm_id {
-	uint64_t cm_id_reg;
-	struct {
-		uint64_t always_one:1,	// 0
-		 mfg_id:11,	// 11:1
-		 part_num:16,	// 27:12
-		 bitstream_rev:8,	// 35:28
-		:28;		// 63:36
-	};
-};
-
-union cm_status {
-	uint64_t cm_status_reg;
-	struct {
-		uint64_t pending_reads:8,	// 7:0
-		 pending_writes:8,	// 15:8
-		 ice_rsp_credits:8,	// 23:16
-		 ice_req_credits:8,	// 31:24
-		 cm_req_credits:8,	// 39:32
-		:1,		// 40
-		 rd_dma_in_progress:1,	// 41
-		 rd_dma_done:1,	// 42
-		:1,		// 43
-		 wr_dma_in_progress:1,	// 44
-		 wr_dma_done:1,	// 45
-		 alg_waiting:1,	// 46
-		 alg_pipe_running:1,	// 47
-		 alg_done:1,	// 48
-		:3,		// 51:49
-		 pending_int_reqs:8,	// 59:52
-		:3,		// 62:60
-		 alg_half_speed_sel:1;	// 63
-	};
-};
-
-union cm_error_detail1 {
-	uint64_t cm_error_detail1_reg;
-	struct {
-		uint64_t packet_type:4,	// 3:0
-		 source_id:2,	// 5:4
-		 data_size:2,	// 7:6
-		 tnum:8,	// 15:8
-		 byte_enable:8,	// 23:16
-		 gfx_cred:8,	// 31:24
-		 read_type:2,	// 33:32
-		 pio_or_memory:1,	// 34
-		 head_cw_error:1,	// 35
-		:12,		// 47:36
-		 head_error_bit:1,	// 48
-		 data_error_bit:1,	// 49
-		:13,		// 62:50
-		 valid:1;	// 63
-	};
-};
-
-union cm_error_detail2 {
-	uint64_t cm_error_detail2_reg;
-	struct {
-		uint64_t address:56,	// 55:0
-		:8;		// 63:56
-	};
-};
-
-union cm_control {
-	uint64_t cm_control_reg;
-	struct {
-		uint64_t cm_id:2,	// 1:0
-		:2,		// 3:2
-		 max_trans:5,	// 8:4
-		:3,		// 11:9
-		 address_mode:1,	// 12
-		:7,		// 19:13
-		 credit_limit:8,	// 27:20
-		:5,		// 32:28
-		 rearm_stat_regs:1,	// 33
-		 prescalar_byp:1,	// 34
-		 force_gap_war:1,	// 35
-		 rd_dma_go:1,	// 36
-		 wr_dma_go:1,	// 37
-		 alg_go:1,	// 38
-		 rd_dma_clr:1,	// 39
-		 wr_dma_clr:1,	// 40
-		 alg_clr:1,	// 41
-		:2,		// 43:42
-		 alg_wait_step:1,	// 44
-		 alg_done_amo_en:1,	// 45
-		 alg_done_int_en:1,	// 46
-		:1,		// 47
-		 alg_sram0_locked:1,	// 48
-		 alg_sram1_locked:1,	// 49
-		 alg_sram2_locked:1,	// 50
-		 alg_done_clr:1,	// 51
-		:12;		// 63:52
-	};
-};
-
-union cm_req_timeout {
-	uint64_t cm_req_timeout_reg;
-	struct {
-		uint64_t time_out:24,	// 23:0
-		:40;		// 63:24
-	};
-};
-
-union intr_dest {
-	uint64_t intr_dest_reg;
-	struct {
-		uint64_t address:56,	// 55:0
-		 int_vector:8;	// 63:56
-	};
-};
-
-union cm_error_status {
-	uint64_t cm_error_status_reg;
-	struct {
-		uint64_t ecc_sbe:1,	// 0
-		 ecc_mbe:1,	// 1
-		 unsupported_req:1,	// 2
-		 unexpected_rsp:1,	// 3
-		 bad_length:1,	// 4
-		 bad_datavalid:1,	// 5
-		 buffer_overflow:1,	// 6
-		 request_timeout:1,	// 7
-		:8,		// 15:8
-		 head_inv_data_size:1,	// 16
-		 rsp_pactype_inv:1,	// 17
-		 head_sb_err:1,	// 18
-		 missing_head:1,	// 19
-		 head_inv_rd_type:1,	// 20
-		 head_cmd_err_bit:1,	// 21
-		 req_addr_align_inv:1,	// 22
-		 pio_req_addr_inv:1,	// 23
-		 req_range_dsize_inv:1,	// 24
-		 early_term:1,	// 25
-		 early_tail:1,	// 26
-		 missing_tail:1,	// 27
-		 data_flit_sb_err:1,	// 28
-		 cm2hcm_req_cred_of:1,	// 29
-		 cm2hcm_rsp_cred_of:1,	// 30
-		 rx_bad_didn:1,	// 31
-		 rd_dma_err_rsp:1,	// 32
-		 rd_dma_tnum_tout:1,	// 33
-		 rd_dma_multi_tnum_tou:1,	// 34
-		 wr_dma_err_rsp:1,	// 35
-		 wr_dma_tnum_tout:1,	// 36
-		 wr_dma_multi_tnum_tou:1,	// 37
-		 alg_data_overflow:1,	// 38
-		 alg_data_underflow:1,	// 39
-		 ram0_access_conflict:1,	// 40
-		 ram1_access_conflict:1,	// 41
-		 ram2_access_conflict:1,	// 42
-		 ram0_perr:1,	// 43
-		 ram1_perr:1,	// 44
-		 ram2_perr:1,	// 45
-		 int_gen_rsp_err:1,	// 46
-		 int_gen_tnum_tout:1,	// 47
-		 rd_dma_prog_err:1,	// 48
-		 wr_dma_prog_err:1,	// 49
-		:14;		// 63:50
-	};
-};
-
-union cm_clr_error_status {
-	uint64_t cm_clr_error_status_reg;
-	struct {
-		uint64_t clr_ecc_sbe:1,	// 0
-		 clr_ecc_mbe:1,	// 1
-		 clr_unsupported_req:1,	// 2
-		 clr_unexpected_rsp:1,	// 3
-		 clr_bad_length:1,	// 4
-		 clr_bad_datavalid:1,	// 5
-		 clr_buffer_overflow:1,	// 6
-		 clr_request_timeout:1,	// 7
-		:8,		// 15:8
-		 clr_head_inv_data_siz:1,	// 16
-		 clr_rsp_pactype_inv:1,	// 17
-		 clr_head_sb_err:1,	// 18
-		 clr_missing_head:1,	// 19
-		 clr_head_inv_rd_type:1,	// 20
-		 clr_head_cmd_err_bit:1,	// 21
-		 clr_req_addr_align_in:1,	// 22
-		 clr_pio_req_addr_inv:1,	// 23
-		 clr_req_range_dsize_i:1,	// 24
-		 clr_early_term:1,	// 25
-		 clr_early_tail:1,	// 26
-		 clr_missing_tail:1,	// 27
-		 clr_data_flit_sb_err:1,	// 28
-		 clr_cm2hcm_req_cred_o:1,	// 29
-		 clr_cm2hcm_rsp_cred_o:1,	// 30
-		 clr_rx_bad_didn:1,	// 31
-		 clr_rd_dma_err_rsp:1,	// 32
-		 clr_rd_dma_tnum_tout:1,	// 33
-		 clr_rd_dma_multi_tnum:1,	// 34
-		 clr_wr_dma_err_rsp:1,	// 35
-		 clr_wr_dma_tnum_tout:1,	// 36
-		 clr_wr_dma_multi_tnum:1,	// 37
-		 clr_alg_data_overflow:1,	// 38
-		 clr_alg_data_underflo:1,	// 39
-		 clr_ram0_access_confl:1,	// 40
-		 clr_ram1_access_confl:1,	// 41
-		 clr_ram2_access_confl:1,	// 42
-		 clr_ram0_perr:1,	// 43
-		 clr_ram1_perr:1,	// 44
-		 clr_ram2_perr:1,	// 45
-		 clr_int_gen_rsp_err:1,	// 46
-		 clr_int_gen_tnum_tout:1,	// 47
-		 clr_rd_dma_prog_err:1,	// 48
-		 clr_wr_dma_prog_err:1,	// 49
-		:14;		// 63:50
-	};
-};
-
-union cm_error_intr_enable {
-	uint64_t cm_error_intr_enable_reg;
-	struct {
-		uint64_t int_en_ecc_sbe:1,	// 0
-		 int_en_ecc_mbe:1,	// 1
-		 int_en_unsupported_re:1,	// 2
-		 int_en_unexpected_rsp:1,	// 3
-		 int_en_bad_length:1,	// 4
-		 int_en_bad_datavalid:1,	// 5
-		 int_en_buffer_overflo:1,	// 6
-		 int_en_request_timeou:1,	// 7
-		:8,		// 15:8
-		 int_en_head_inv_data_:1,	// 16
-		 int_en_rsp_pactype_in:1,	// 17
-		 int_en_head_sb_err:1,	// 18
-		 int_en_missing_head:1,	// 19
-		 int_en_head_inv_rd_ty:1,	// 20
-		 int_en_head_cmd_err_b:1,	// 21
-		 int_en_req_addr_align:1,	// 22
-		 int_en_pio_req_addr_i:1,	// 23
-		 int_en_req_range_dsiz:1,	// 24
-		 int_en_early_term:1,	// 25
-		 int_en_early_tail:1,	// 26
-		 int_en_missing_tail:1,	// 27
-		 int_en_data_flit_sb_e:1,	// 28
-		 int_en_cm2hcm_req_cre:1,	// 29
-		 int_en_cm2hcm_rsp_cre:1,	// 30
-		 int_en_rx_bad_didn:1,	// 31
-		 int_en_rd_dma_err_rsp:1,	// 32
-		 int_en_rd_dma_tnum_to:1,	// 33
-		 int_en_rd_dma_multi_t:1,	// 34
-		 int_en_wr_dma_err_rsp:1,	// 35
-		 int_en_wr_dma_tnum_to:1,	// 36
-		 int_en_wr_dma_multi_t:1,	// 37
-		 int_en_alg_data_overf:1,	// 38
-		 int_en_alg_data_under:1,	// 39
-		 int_en_ram0_access_co:1,	// 40
-		 int_en_ram1_access_co:1,	// 41
-		 int_en_ram2_access_co:1,	// 42
-		 int_en_ram0_perr:1,	// 43
-		 int_en_ram1_perr:1,	// 44
-		 int_en_ram2_perr:1,	// 45
-		 int_en_int_gen_rsp_er:1,	// 46
-		 int_en_int_gen_tnum_t:1,	// 47
-		 int_en_rd_dma_prog_er:1,	// 48
-		 int_en_wr_dma_prog_er:1,	// 49
-		:14;		// 63:50
-	};
-};
-
-struct cm_mmr {
-	union cm_id id;
-	union cm_status status;
-	union cm_error_detail1 err_detail1;
-	union cm_error_detail2 err_detail2;
-	union cm_control control;
-	union cm_req_timeout req_timeout;
-	uint64_t reserved1[1];
-	union intr_dest int_dest;
-	uint64_t reserved2[2];
-	uint64_t targ_flush;
-	uint64_t reserved3[1];
-	union cm_error_status err_status;
-	union cm_clr_error_status clr_err_status;
-	union cm_error_intr_enable int_enable;
-};
-
-union dma_hostaddr {
-	uint64_t dma_hostaddr_reg;
-	struct {
-		uint64_t dma_sys_addr:56,	// 55:0
-		:8;		// 63:56
-	};
-};
-
-union dma_localaddr {
-	uint64_t dma_localaddr_reg;
-	struct {
-		uint64_t dma_ram_addr:21,	// 20:0
-		 dma_ram_sel:2,	// 22:21
-		:41;		// 63:23
-	};
-};
-
-union dma_control {
-	uint64_t dma_control_reg;
-	struct {
-		uint64_t dma_op_length:16,	// 15:0
-		:18,		// 33:16
-		 done_amo_en:1,	// 34
-		 done_int_en:1,	// 35
-		:1,		// 36
-		 pio_mem_n:1,	// 37
-		:26;		// 63:38
-	};
-};
-
-union dma_amo_dest {
-	uint64_t dma_amo_dest_reg;
-	struct {
-		uint64_t dma_amo_sys_addr:56,	// 55:0
-		 dma_amo_mod_type:3,	// 58:56
-		:5;		// 63:59
-	};
-};
-
-union rdma_aux_status {
-	uint64_t rdma_aux_status_reg;
-	struct {
-		uint64_t op_num_pacs_left:17,	// 16:0
-		:5,		// 21:17
-		 lrsp_buff_empty:1,	// 22
-		:17,		// 39:23
-		 pending_reqs_left:6,	// 45:40
-		:18;		// 63:46
-	};
-};
-
-struct rdma_mmr {
-	union dma_hostaddr host_addr;
-	union dma_localaddr local_addr;
-	union dma_control control;
-	union dma_amo_dest amo_dest;
-	union intr_dest intr_dest;
-	union rdma_aux_status aux_status;
-};
-
-union wdma_aux_status {
-	uint64_t wdma_aux_status_reg;
-	struct {
-		uint64_t op_num_pacs_left:17,	// 16:0
-		:4,		// 20:17
-		 lreq_buff_empty:1,	// 21
-		:18,		// 39:22
-		 pending_reqs_left:6,	// 45:40
-		:18;		// 63:46
-	};
-};
-
-struct wdma_mmr {
-	union dma_hostaddr host_addr;
-	union dma_localaddr local_addr;
-	union dma_control control;
-	union dma_amo_dest amo_dest;
-	union intr_dest intr_dest;
-	union wdma_aux_status aux_status;
-};
-
-union algo_step {
-	uint64_t algo_step_reg;
-	struct {
-		uint64_t alg_step_cnt:16,	// 15:0
-		:48;		// 63:16
-	};
-};
-
-struct algo_mmr {
-	union dma_amo_dest amo_dest;
-	union intr_dest intr_dest;
-	union {
-		uint64_t algo_offset_reg;
-		struct {
-			uint64_t sram0_offset:7,	// 6:0
-			reserved0:1,	// 7
-			sram1_offset:7,	// 14:8
-			reserved1:1,	// 15
-			sram2_offset:7,	// 22:16
-			reserved2:14;	// 63:23
-		};
-	} sram_offset;
-	union algo_step step;
-};
-
-struct mbcs_mmr {
-	struct cm_mmr cm;
-	uint64_t reserved1[17];
-	struct rdma_mmr rdDma;
-	uint64_t reserved2[25];
-	struct wdma_mmr wrDma;
-	uint64_t reserved3[25];
-	struct algo_mmr algo;
-	uint64_t reserved4[156];
-};
-
-/*
- * defines
- */
-#define DEVICE_NAME "mbcs"
-#define MBCS_PART_NUM 0xfff0
-#define MBCS_PART_NUM_ALG0 0xf001
-#define MBCS_MFG_NUM  0x1
-
-struct algoblock {
-	uint64_t amoHostDest;
-	uint64_t amoModType;
-	uint64_t intrHostDest;
-	uint64_t intrVector;
-	uint64_t algoStepCount;
-};
-
-struct getdma {
-	uint64_t hostAddr;
-	uint64_t localAddr;
-	uint64_t bytes;
-	uint64_t DoneAmoEnable;
-	uint64_t DoneIntEnable;
-	uint64_t peerIO;
-	uint64_t amoHostDest;
-	uint64_t amoModType;
-	uint64_t intrHostDest;
-	uint64_t intrVector;
-};
-
-struct putdma {
-	uint64_t hostAddr;
-	uint64_t localAddr;
-	uint64_t bytes;
-	uint64_t DoneAmoEnable;
-	uint64_t DoneIntEnable;
-	uint64_t peerIO;
-	uint64_t amoHostDest;
-	uint64_t amoModType;
-	uint64_t intrHostDest;
-	uint64_t intrVector;
-};
-
-struct mbcs_soft {
-	struct list_head list;
-	struct cx_dev *cxdev;
-	int major;
-	int nasid;
-	void *mmr_base;
-	wait_queue_head_t dmawrite_queue;
-	wait_queue_head_t dmaread_queue;
-	wait_queue_head_t algo_queue;
-	struct sn_irq_info *get_sn_irq;
-	struct sn_irq_info *put_sn_irq;
-	struct sn_irq_info *algo_sn_irq;
-	struct getdma getdma;
-	struct putdma putdma;
-	struct algoblock algo;
-	uint64_t gscr_addr;	// pio addr
-	uint64_t ram0_addr;	// pio addr
-	uint64_t ram1_addr;	// pio addr
-	uint64_t ram2_addr;	// pio addr
-	uint64_t debug_addr;	// pio addr
-	atomic_t dmawrite_done;
-	atomic_t dmaread_done;
-	atomic_t algo_done;
-	struct mutex dmawritelock;
-	struct mutex dmareadlock;
-	struct mutex algolock;
-};
-
-static int mbcs_open(struct inode *ip, struct file *fp);
-static ssize_t mbcs_sram_read(struct file *fp, char __user *buf, size_t len,
-			      loff_t * off);
-static ssize_t mbcs_sram_write(struct file *fp, const char __user *buf, size_t len,
-			       loff_t * off);
-static loff_t mbcs_sram_llseek(struct file *filp, loff_t off, int whence);
-static int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma);
-
-#endif				// __MBCS_H__
diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index e75c9df7c2d8..a9d9f074fbd6 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -9,11 +9,8 @@
  *
  * This driver exports the SN special memory (mspec) facility to user
  * processes.
- * There are three types of memory made available thru this driver:
- * fetchops, uncached and cached.
- *
- * Fetchops are atomic memory operations that are implemented in the
- * memory controller on SGI SN hardware.
+ * There are two types of memory made available thru this driver:
+ * uncached and cached.
  *
  * Uncached are used for memory write combining feature of the ia64
  * cpu.
@@ -46,16 +43,8 @@
 #include <linux/atomic.h>
 #include <asm/tlbflush.h>
 #include <asm/uncached.h>
-#include <asm/sn/addrs.h>
-#include <asm/sn/arch.h>
-#include <asm/sn/mspec.h>
-#include <asm/sn/sn_cpuid.h>
-#include <asm/sn/io.h>
-#include <asm/sn/bte.h>
-#include <asm/sn/shubio.h>
 
 
-#define FETCHOP_ID	"SGI Fetchop,"
 #define CACHED_ID	"Cached,"
 #define UNCACHED_ID	"Uncached"
 #define REVISION	"4.0"
@@ -65,17 +54,10 @@
  * Page types allocated by the device.
  */
 enum mspec_page_type {
-	MSPEC_FETCHOP = 1,
-	MSPEC_CACHED,
+	MSPEC_CACHED = 2,
 	MSPEC_UNCACHED
 };
 
-#ifdef CONFIG_SGI_SN
-static int is_sn2;
-#else
-#define is_sn2		0
-#endif
-
 /*
  * One of these structures is allocated when an mspec region is mmaped. The
  * structure is pointed to by the vma->vm_private_data field in the vma struct.
@@ -96,39 +78,6 @@ struct vma_data {
 	unsigned long maddr[0];	/* Array of MSPEC addresses. */
 };
 
-/* used on shub2 to clear FOP cache in the HUB */
-static unsigned long scratch_page[MAX_NUMNODES];
-#define SH2_AMO_CACHE_ENTRIES	4
-
-static inline int
-mspec_zero_block(unsigned long addr, int len)
-{
-	int status;
-
-	if (is_sn2) {
-		if (is_shub2()) {
-			int nid;
-			void *p;
-			int i;
-
-			nid = nasid_to_cnodeid(get_node_number(__pa(addr)));
-			p = (void *)TO_AMO(scratch_page[nid]);
-
-			for (i=0; i < SH2_AMO_CACHE_ENTRIES; i++) {
-				FETCHOP_LOAD_OP(p, FETCHOP_LOAD);
-				p += FETCHOP_VAR_SIZE;
-			}
-		}
-
-		status = bte_copy(0, addr & ~__IA64_UNCACHED_OFFSET, len,
-				  BTE_WACQUIRE | BTE_ZERO_FILL, NULL);
-	} else {
-		memset((char *) addr, 0, len);
-		status = 0;
-	}
-	return status;
-}
-
 /*
  * mspec_open
  *
@@ -173,11 +122,8 @@ mspec_close(struct vm_area_struct *vma)
 		 */
 		my_page = vdata->maddr[index];
 		vdata->maddr[index] = 0;
-		if (!mspec_zero_block(my_page, PAGE_SIZE))
-			uncached_free_page(my_page, 1);
-		else
-			printk(KERN_WARNING "mspec_close(): "
-			       "failed to zero page %ld\n", my_page);
+		memset((char *)my_page, 0, PAGE_SIZE);
+		uncached_free_page(my_page, 1);
 	}
 
 	kvfree(vdata);
@@ -213,11 +159,7 @@ mspec_fault(struct vm_fault *vmf)
 		spin_unlock(&vdata->lock);
 	}
 
-	if (vdata->type == MSPEC_FETCHOP)
-		paddr = TO_AMO(maddr);
-	else
-		paddr = maddr & ~__IA64_UNCACHED_OFFSET;
-
+	paddr = maddr & ~__IA64_UNCACHED_OFFSET;
 	pfn = paddr >> PAGE_SHIFT;
 
 	return vmf_insert_pfn(vmf->vma, vmf->address, pfn);
@@ -269,7 +211,7 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma,
 	vma->vm_private_data = vdata;
 
 	vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
-	if (vdata->type == MSPEC_FETCHOP || vdata->type == MSPEC_UNCACHED)
+	if (vdata->type == MSPEC_UNCACHED)
 		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 	vma->vm_ops = &mspec_vm_ops;
 
@@ -277,12 +219,6 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma,
 }
 
 static int
-fetchop_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	return mspec_mmap(file, vma, MSPEC_FETCHOP);
-}
-
-static int
 cached_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	return mspec_mmap(file, vma, MSPEC_CACHED);
@@ -294,18 +230,6 @@ uncached_mmap(struct file *file, struct vm_area_struct *vma)
 	return mspec_mmap(file, vma, MSPEC_UNCACHED);
 }
 
-static const struct file_operations fetchop_fops = {
-	.owner = THIS_MODULE,
-	.mmap = fetchop_mmap,
-	.llseek = noop_llseek,
-};
-
-static struct miscdevice fetchop_miscdev = {
-	.minor = MISC_DYNAMIC_MINOR,
-	.name = "sgi_fetchop",
-	.fops = &fetchop_fops
-};
-
 static const struct file_operations cached_fops = {
 	.owner = THIS_MODULE,
 	.mmap = cached_mmap,
@@ -339,89 +263,32 @@ static int __init
 mspec_init(void)
 {
 	int ret;
-	int nid;
-
-	/*
-	 * The fetchop device only works on SN2 hardware, uncached and cached
-	 * memory drivers should both be valid on all ia64 hardware
-	 */
-#ifdef CONFIG_SGI_SN
-	if (ia64_platform_is("sn2")) {
-		is_sn2 = 1;
-		if (is_shub2()) {
-			ret = -ENOMEM;
-			for_each_node_state(nid, N_ONLINE) {
-				int actual_nid;
-				int nasid;
-				unsigned long phys;
-
-				scratch_page[nid] = uncached_alloc_page(nid, 1);
-				if (scratch_page[nid] == 0)
-					goto free_scratch_pages;
-				phys = __pa(scratch_page[nid]);
-				nasid = get_node_number(phys);
-				actual_nid = nasid_to_cnodeid(nasid);
-				if (actual_nid != nid)
-					goto free_scratch_pages;
-			}
-		}
 
-		ret = misc_register(&fetchop_miscdev);
-		if (ret) {
-			printk(KERN_ERR
-			       "%s: failed to register device %i\n",
-			       FETCHOP_ID, ret);
-			goto free_scratch_pages;
-		}
-	}
-#endif
 	ret = misc_register(&cached_miscdev);
 	if (ret) {
 		printk(KERN_ERR "%s: failed to register device %i\n",
 		       CACHED_ID, ret);
-		if (is_sn2)
-			misc_deregister(&fetchop_miscdev);
-		goto free_scratch_pages;
+		return ret;
 	}
 	ret = misc_register(&uncached_miscdev);
 	if (ret) {
 		printk(KERN_ERR "%s: failed to register device %i\n",
 		       UNCACHED_ID, ret);
 		misc_deregister(&cached_miscdev);
-		if (is_sn2)
-			misc_deregister(&fetchop_miscdev);
-		goto free_scratch_pages;
+		return ret;
 	}
 
-	printk(KERN_INFO "%s %s initialized devices: %s %s %s\n",
-	       MSPEC_BASENAME, REVISION, is_sn2 ? FETCHOP_ID : "",
-	       CACHED_ID, UNCACHED_ID);
+	printk(KERN_INFO "%s %s initialized devices: %s %s\n",
+	       MSPEC_BASENAME, REVISION, CACHED_ID, UNCACHED_ID);
 
 	return 0;
-
- free_scratch_pages:
-	for_each_node(nid) {
-		if (scratch_page[nid] != 0)
-			uncached_free_page(scratch_page[nid], 1);
-	}
-	return ret;
 }
 
 static void __exit
 mspec_exit(void)
 {
-	int nid;
-
 	misc_deregister(&uncached_miscdev);
 	misc_deregister(&cached_miscdev);
-	if (is_sn2) {
-		misc_deregister(&fetchop_miscdev);
-
-		for_each_node(nid) {
-			if (scratch_page[nid] != 0)
-				uncached_free_page(scratch_page[nid], 1);
-		}
-	}
 }
 
 module_init(mspec_init);
diff --git a/drivers/char/snsc.c b/drivers/char/snsc.c
deleted file mode 100644
index 5918ea7499bb..000000000000
--- a/drivers/char/snsc.c
+++ /dev/null
@@ -1,469 +0,0 @@
-/*
- * SN Platform system controller communication support
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2004, 2006 Silicon Graphics, Inc. All rights reserved.
- */
-
-/*
- * System controller communication driver
- *
- * This driver allows a user process to communicate with the system
- * controller (a.k.a. "IRouter") network in an SGI SN system.
- */
-
-#include <linux/interrupt.h>
-#include <linux/sched/signal.h>
-#include <linux/device.h>
-#include <linux/poll.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <asm/sn/io.h>
-#include <asm/sn/sn_sal.h>
-#include <asm/sn/module.h>
-#include <asm/sn/geo.h>
-#include <asm/sn/nodepda.h>
-#include "snsc.h"
-
-#define SYSCTL_BASENAME	"snsc"
-
-#define SCDRV_BUFSZ	2048
-#define SCDRV_TIMEOUT	1000
-
-static DEFINE_MUTEX(scdrv_mutex);
-static irqreturn_t
-scdrv_interrupt(int irq, void *subch_data)
-{
-	struct subch_data_s *sd = subch_data;
-	unsigned long flags;
-	int status;
-
-	spin_lock_irqsave(&sd->sd_rlock, flags);
-	spin_lock(&sd->sd_wlock);
-	status = ia64_sn_irtr_intr(sd->sd_nasid, sd->sd_subch);
-
-	if (status > 0) {
-		if (status & SAL_IROUTER_INTR_RECV) {
-			wake_up(&sd->sd_rq);
-		}
-		if (status & SAL_IROUTER_INTR_XMIT) {
-			ia64_sn_irtr_intr_disable
-			    (sd->sd_nasid, sd->sd_subch,
-			     SAL_IROUTER_INTR_XMIT);
-			wake_up(&sd->sd_wq);
-		}
-	}
-	spin_unlock(&sd->sd_wlock);
-	spin_unlock_irqrestore(&sd->sd_rlock, flags);
-	return IRQ_HANDLED;
-}
-
-/*
- * scdrv_open
- *
- * Reserve a subchannel for system controller communication.
- */
-
-static int
-scdrv_open(struct inode *inode, struct file *file)
-{
-	struct sysctl_data_s *scd;
-	struct subch_data_s *sd;
-	int rv;
-
-	/* look up device info for this device file */
-	scd = container_of(inode->i_cdev, struct sysctl_data_s, scd_cdev);
-
-	/* allocate memory for subchannel data */
-	sd = kzalloc(sizeof (struct subch_data_s), GFP_KERNEL);
-	if (sd == NULL) {
-		printk("%s: couldn't allocate subchannel data\n",
-		       __func__);
-		return -ENOMEM;
-	}
-
-	/* initialize subch_data_s fields */
-	sd->sd_nasid = scd->scd_nasid;
-	sd->sd_subch = ia64_sn_irtr_open(scd->scd_nasid);
-
-	if (sd->sd_subch < 0) {
-		kfree(sd);
-		printk("%s: couldn't allocate subchannel\n", __func__);
-		return -EBUSY;
-	}
-
-	spin_lock_init(&sd->sd_rlock);
-	spin_lock_init(&sd->sd_wlock);
-	init_waitqueue_head(&sd->sd_rq);
-	init_waitqueue_head(&sd->sd_wq);
-	sema_init(&sd->sd_rbs, 1);
-	sema_init(&sd->sd_wbs, 1);
-
-	file->private_data = sd;
-
-	/* hook this subchannel up to the system controller interrupt */
-	mutex_lock(&scdrv_mutex);
-	rv = request_irq(SGI_UART_VECTOR, scdrv_interrupt,
-			 IRQF_SHARED, SYSCTL_BASENAME, sd);
-	if (rv) {
-		ia64_sn_irtr_close(sd->sd_nasid, sd->sd_subch);
-		kfree(sd);
-		printk("%s: irq request failed (%d)\n", __func__, rv);
-		mutex_unlock(&scdrv_mutex);
-		return -EBUSY;
-	}
-	mutex_unlock(&scdrv_mutex);
-	return 0;
-}
-
-/*
- * scdrv_release
- *
- * Release a previously-reserved subchannel.
- */
-
-static int
-scdrv_release(struct inode *inode, struct file *file)
-{
-	struct subch_data_s *sd = (struct subch_data_s *) file->private_data;
-	int rv;
-
-	/* free the interrupt */
-	free_irq(SGI_UART_VECTOR, sd);
-
-	/* ask SAL to close the subchannel */
-	rv = ia64_sn_irtr_close(sd->sd_nasid, sd->sd_subch);
-
-	kfree(sd);
-	return rv;
-}
-
-/*
- * scdrv_read
- *
- * Called to read bytes from the open IRouter pipe.
- *
- */
-
-static inline int
-read_status_check(struct subch_data_s *sd, int *len)
-{
-	return ia64_sn_irtr_recv(sd->sd_nasid, sd->sd_subch, sd->sd_rb, len);
-}
-
-static ssize_t
-scdrv_read(struct file *file, char __user *buf, size_t count, loff_t *f_pos)
-{
-	int status;
-	int len;
-	unsigned long flags;
-	struct subch_data_s *sd = (struct subch_data_s *) file->private_data;
-
-	/* try to get control of the read buffer */
-	if (down_trylock(&sd->sd_rbs)) {
-		/* somebody else has it now;
-		 * if we're non-blocking, then exit...
-		 */
-		if (file->f_flags & O_NONBLOCK) {
-			return -EAGAIN;
-		}
-		/* ...or if we want to block, then do so here */
-		if (down_interruptible(&sd->sd_rbs)) {
-			/* something went wrong with wait */
-			return -ERESTARTSYS;
-		}
-	}
-
-	/* anything to read? */
-	len = CHUNKSIZE;
-	spin_lock_irqsave(&sd->sd_rlock, flags);
-	status = read_status_check(sd, &len);
-
-	/* if not, and we're blocking I/O, loop */
-	while (status < 0) {
-		DECLARE_WAITQUEUE(wait, current);
-
-		if (file->f_flags & O_NONBLOCK) {
-			spin_unlock_irqrestore(&sd->sd_rlock, flags);
-			up(&sd->sd_rbs);
-			return -EAGAIN;
-		}
-
-		len = CHUNKSIZE;
-		set_current_state(TASK_INTERRUPTIBLE);
-		add_wait_queue(&sd->sd_rq, &wait);
-		spin_unlock_irqrestore(&sd->sd_rlock, flags);
-
-		schedule_timeout(msecs_to_jiffies(SCDRV_TIMEOUT));
-
-		remove_wait_queue(&sd->sd_rq, &wait);
-		if (signal_pending(current)) {
-			/* wait was interrupted */
-			up(&sd->sd_rbs);
-			return -ERESTARTSYS;
-		}
-
-		spin_lock_irqsave(&sd->sd_rlock, flags);
-		status = read_status_check(sd, &len);
-	}
-	spin_unlock_irqrestore(&sd->sd_rlock, flags);
-
-	if (len > 0) {
-		/* we read something in the last read_status_check(); copy
-		 * it out to user space
-		 */
-		if (count < len) {
-			pr_debug("%s: only accepting %d of %d bytes\n",
-				 __func__, (int) count, len);
-		}
-		len = min((int) count, len);
-		if (copy_to_user(buf, sd->sd_rb, len))
-			len = -EFAULT;
-	}
-
-	/* release the read buffer and wake anyone who might be
-	 * waiting for it
-	 */
-	up(&sd->sd_rbs);
-
-	/* return the number of characters read in */
-	return len;
-}
-
-/*
- * scdrv_write
- *
- * Writes a chunk of an IRouter packet (or other system controller data)
- * to the system controller.
- *
- */
-static inline int
-write_status_check(struct subch_data_s *sd, int count)
-{
-	return ia64_sn_irtr_send(sd->sd_nasid, sd->sd_subch, sd->sd_wb, count);
-}
-
-static ssize_t
-scdrv_write(struct file *file, const char __user *buf,
-	    size_t count, loff_t *f_pos)
-{
-	unsigned long flags;
-	int status;
-	struct subch_data_s *sd = (struct subch_data_s *) file->private_data;
-
-	/* try to get control of the write buffer */
-	if (down_trylock(&sd->sd_wbs)) {
-		/* somebody else has it now;
-		 * if we're non-blocking, then exit...
-		 */
-		if (file->f_flags & O_NONBLOCK) {
-			return -EAGAIN;
-		}
-		/* ...or if we want to block, then do so here */
-		if (down_interruptible(&sd->sd_wbs)) {
-			/* something went wrong with wait */
-			return -ERESTARTSYS;
-		}
-	}
-
-	count = min((int) count, CHUNKSIZE);
-	if (copy_from_user(sd->sd_wb, buf, count)) {
-		up(&sd->sd_wbs);
-		return -EFAULT;
-	}
-
-	/* try to send the buffer */
-	spin_lock_irqsave(&sd->sd_wlock, flags);
-	status = write_status_check(sd, count);
-
-	/* if we failed, and we want to block, then loop */
-	while (status <= 0) {
-		DECLARE_WAITQUEUE(wait, current);
-
-		if (file->f_flags & O_NONBLOCK) {
-			spin_unlock_irqrestore(&sd->sd_wlock, flags);
-			up(&sd->sd_wbs);
-			return -EAGAIN;
-		}
-
-		set_current_state(TASK_INTERRUPTIBLE);
-		add_wait_queue(&sd->sd_wq, &wait);
-		spin_unlock_irqrestore(&sd->sd_wlock, flags);
-
-		schedule_timeout(msecs_to_jiffies(SCDRV_TIMEOUT));
-
-		remove_wait_queue(&sd->sd_wq, &wait);
-		if (signal_pending(current)) {
-			/* wait was interrupted */
-			up(&sd->sd_wbs);
-			return -ERESTARTSYS;
-		}
-
-		spin_lock_irqsave(&sd->sd_wlock, flags);
-		status = write_status_check(sd, count);
-	}
-	spin_unlock_irqrestore(&sd->sd_wlock, flags);
-
-	/* release the write buffer and wake anyone who's waiting for it */
-	up(&sd->sd_wbs);
-
-	/* return the number of characters accepted (should be the complete
-	 * "chunk" as requested)
-	 */
-	if ((status >= 0) && (status < count)) {
-		pr_debug("Didn't accept the full chunk; %d of %d\n",
-			 status, (int) count);
-	}
-	return status;
-}
-
-static __poll_t
-scdrv_poll(struct file *file, struct poll_table_struct *wait)
-{
-	__poll_t mask = 0;
-	int status = 0;
-	struct subch_data_s *sd = (struct subch_data_s *) file->private_data;
-	unsigned long flags;
-
-	poll_wait(file, &sd->sd_rq, wait);
-	poll_wait(file, &sd->sd_wq, wait);
-
-	spin_lock_irqsave(&sd->sd_rlock, flags);
-	spin_lock(&sd->sd_wlock);
-	status = ia64_sn_irtr_intr(sd->sd_nasid, sd->sd_subch);
-	spin_unlock(&sd->sd_wlock);
-	spin_unlock_irqrestore(&sd->sd_rlock, flags);
-
-	if (status > 0) {
-		if (status & SAL_IROUTER_INTR_RECV) {
-			mask |= EPOLLIN | EPOLLRDNORM;
-		}
-		if (status & SAL_IROUTER_INTR_XMIT) {
-			mask |= EPOLLOUT | EPOLLWRNORM;
-		}
-	}
-
-	return mask;
-}
-
-static const struct file_operations scdrv_fops = {
-	.owner =	THIS_MODULE,
-	.read =		scdrv_read,
-	.write =	scdrv_write,
-	.poll =		scdrv_poll,
-	.open =		scdrv_open,
-	.release =	scdrv_release,
-	.llseek =	noop_llseek,
-};
-
-static struct class *snsc_class;
-
-/*
- * scdrv_init
- *
- * Called at boot time to initialize the system controller communication
- * facility.
- */
-int __init
-scdrv_init(void)
-{
-	geoid_t geoid;
-	cnodeid_t cnode;
-	char devname[32];
-	char *devnamep;
-	struct sysctl_data_s *scd;
-	void *salbuf;
-	dev_t first_dev, dev;
-	nasid_t event_nasid;
-
-	if (!ia64_platform_is("sn2"))
-		return -ENODEV;
-
-	event_nasid = ia64_sn_get_console_nasid();
-
-	snsc_class = class_create(THIS_MODULE, SYSCTL_BASENAME);
-	if (IS_ERR(snsc_class)) {
-		printk("%s: failed to allocate class\n", __func__);
-		return PTR_ERR(snsc_class);
-	}
-
-	if (alloc_chrdev_region(&first_dev, 0, num_cnodes,
-				SYSCTL_BASENAME) < 0) {
-		printk("%s: failed to register SN system controller device\n",
-		       __func__);
-		return -ENODEV;
-	}
-
-	for (cnode = 0; cnode < num_cnodes; cnode++) {
-			geoid = cnodeid_get_geoid(cnode);
-			devnamep = devname;
-			format_module_id(devnamep, geo_module(geoid),
-					 MODULE_FORMAT_BRIEF);
-			devnamep = devname + strlen(devname);
-			sprintf(devnamep, "^%d#%d", geo_slot(geoid),
-				geo_slab(geoid));
-
-			/* allocate sysctl device data */
-			scd = kzalloc(sizeof (struct sysctl_data_s),
-				      GFP_KERNEL);
-			if (!scd) {
-				printk("%s: failed to allocate device info"
-				       "for %s/%s\n", __func__,
-				       SYSCTL_BASENAME, devname);
-				continue;
-			}
-
-			/* initialize sysctl device data fields */
-			scd->scd_nasid = cnodeid_to_nasid(cnode);
-			if (!(salbuf = kmalloc(SCDRV_BUFSZ, GFP_KERNEL))) {
-				printk("%s: failed to allocate driver buffer"
-				       "(%s%s)\n", __func__,
-				       SYSCTL_BASENAME, devname);
-				kfree(scd);
-				continue;
-			}
-
-			if (ia64_sn_irtr_init(scd->scd_nasid, salbuf,
-					      SCDRV_BUFSZ) < 0) {
-				printk
-				    ("%s: failed to initialize SAL for"
-				     " system controller communication"
-				     " (%s/%s): outdated PROM?\n",
-				     __func__, SYSCTL_BASENAME, devname);
-				kfree(scd);
-				kfree(salbuf);
-				continue;
-			}
-
-			dev = first_dev + cnode;
-			cdev_init(&scd->scd_cdev, &scdrv_fops);
-			if (cdev_add(&scd->scd_cdev, dev, 1)) {
-				printk("%s: failed to register system"
-				       " controller device (%s%s)\n",
-				       __func__, SYSCTL_BASENAME, devname);
-				kfree(scd);
-				kfree(salbuf);
-				continue;
-			}
-
-			device_create(snsc_class, NULL, dev, NULL,
-				      "%s", devname);
-
-			ia64_sn_irtr_intr_enable(scd->scd_nasid,
-						 0 /*ignored */ ,
-						 SAL_IROUTER_INTR_RECV);
-
-                        /* on the console nasid, prepare to receive
-                         * system controller environmental events
-                         */
-                        if(scd->scd_nasid == event_nasid) {
-                                scdrv_event_init(scd);
-                        }
-	}
-	return 0;
-}
-device_initcall(scdrv_init);
diff --git a/drivers/char/snsc.h b/drivers/char/snsc.h
deleted file mode 100644
index e8c52c882b21..000000000000
--- a/drivers/char/snsc.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * SN Platform system controller communication support
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved.
- */
-
-/*
- * This file contains macros and data types for communication with the
- * system controllers in SGI SN systems.
- */
-
-#ifndef _SN_SYSCTL_H_
-#define _SN_SYSCTL_H_
-
-#include <linux/types.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
-#include <linux/fs.h>
-#include <linux/cdev.h>
-#include <linux/semaphore.h>
-#include <asm/sn/types.h>
-
-#define CHUNKSIZE 127
-
-/* This structure is used to track an open subchannel. */
-struct subch_data_s {
-	nasid_t sd_nasid;	/* node on which the subchannel was opened */
-	int sd_subch;		/* subchannel number */
-	spinlock_t sd_rlock;	/* monitor lock for rsv */
-	spinlock_t sd_wlock;	/* monitor lock for wsv */
-	wait_queue_head_t sd_rq;	/* wait queue for readers */
-	wait_queue_head_t sd_wq;	/* wait queue for writers */
-	struct semaphore sd_rbs;	/* semaphore for read buffer */
-	struct semaphore sd_wbs;	/* semaphore for write buffer */
-
-	char sd_rb[CHUNKSIZE];	/* read buffer */
-	char sd_wb[CHUNKSIZE];	/* write buffer */
-};
-
-struct sysctl_data_s {
-	struct cdev scd_cdev;	/* Character device info */
-	nasid_t scd_nasid;	/* Node on which subchannels are opened. */
-};
-
-
-/* argument types */
-#define IR_ARG_INT              0x00    /* 4-byte integer (big-endian)  */
-#define IR_ARG_ASCII            0x01    /* null-terminated ASCII string */
-#define IR_ARG_UNKNOWN          0x80    /* unknown data type.  The low
-                                         * 7 bits will contain the data
-                                         * length.                      */
-#define IR_ARG_UNKNOWN_LENGTH_MASK	0x7f
-
-
-/* system controller event codes */
-#define EV_CLASS_MASK		0xf000ul
-#define EV_SEVERITY_MASK	0x0f00ul
-#define EV_COMPONENT_MASK	0x00fful
-
-#define EV_CLASS_POWER		0x1000ul
-#define EV_CLASS_FAN		0x2000ul
-#define EV_CLASS_TEMP		0x3000ul
-#define EV_CLASS_ENV		0x4000ul
-#define EV_CLASS_TEST_FAULT	0x5000ul
-#define EV_CLASS_TEST_WARNING	0x6000ul
-#define EV_CLASS_PWRD_NOTIFY	0x8000ul
-
-/* ENV class codes */
-#define ENV_PWRDN_PEND		0x4101ul
-
-#define EV_SEVERITY_POWER_STABLE	0x0000ul
-#define EV_SEVERITY_POWER_LOW_WARNING	0x0100ul
-#define EV_SEVERITY_POWER_HIGH_WARNING	0x0200ul
-#define EV_SEVERITY_POWER_HIGH_FAULT	0x0300ul
-#define EV_SEVERITY_POWER_LOW_FAULT	0x0400ul
-
-#define EV_SEVERITY_FAN_STABLE		0x0000ul
-#define EV_SEVERITY_FAN_WARNING		0x0100ul
-#define EV_SEVERITY_FAN_FAULT		0x0200ul
-
-#define EV_SEVERITY_TEMP_STABLE		0x0000ul
-#define EV_SEVERITY_TEMP_ADVISORY	0x0100ul
-#define EV_SEVERITY_TEMP_CRITICAL	0x0200ul
-#define EV_SEVERITY_TEMP_FAULT		0x0300ul
-
-void scdrv_event_init(struct sysctl_data_s *);
-
-#endif /* _SN_SYSCTL_H_ */
diff --git a/drivers/char/snsc_event.c b/drivers/char/snsc_event.c
deleted file mode 100644
index e452673dff66..000000000000
--- a/drivers/char/snsc_event.c
+++ /dev/null
@@ -1,303 +0,0 @@
-/*
- * SN Platform system controller communication support
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved.
- */
-
-/*
- * System controller event handler
- *
- * These routines deal with environmental events arriving from the
- * system controllers.
- */
-
-#include <linux/interrupt.h>
-#include <linux/sched/signal.h>
-#include <linux/slab.h>
-#include <asm/byteorder.h>
-#include <asm/sn/sn_sal.h>
-#include <asm/unaligned.h>
-#include "snsc.h"
-
-static struct subch_data_s *event_sd;
-
-void scdrv_event(unsigned long);
-DECLARE_TASKLET(sn_sysctl_event, scdrv_event, 0);
-
-/*
- * scdrv_event_interrupt
- *
- * Pull incoming environmental events off the physical link to the
- * system controller and put them in a temporary holding area in SAL.
- * Schedule scdrv_event() to move them along to their ultimate
- * destination.
- */
-static irqreturn_t
-scdrv_event_interrupt(int irq, void *subch_data)
-{
-	struct subch_data_s *sd = subch_data;
-	unsigned long flags;
-	int status;
-
-	spin_lock_irqsave(&sd->sd_rlock, flags);
-	status = ia64_sn_irtr_intr(sd->sd_nasid, sd->sd_subch);
-
-	if ((status > 0) && (status & SAL_IROUTER_INTR_RECV)) {
-		tasklet_schedule(&sn_sysctl_event);
-	}
-	spin_unlock_irqrestore(&sd->sd_rlock, flags);
-	return IRQ_HANDLED;
-}
-
-
-/*
- * scdrv_parse_event
- *
- * Break an event (as read from SAL) into useful pieces so we can decide
- * what to do with it.
- */
-static int
-scdrv_parse_event(char *event, int *src, int *code, int *esp_code, char *desc)
-{
-	char *desc_end;
-
-	/* record event source address */
-	*src = get_unaligned_be32(event);
-	event += 4; 			/* move on to event code */
-
-	/* record the system controller's event code */
-	*code = get_unaligned_be32(event);
-	event += 4;			/* move on to event arguments */
-
-	/* how many arguments are in the packet? */
-	if (*event++ != 2) {
-		/* if not 2, give up */
-		return -1;
-	}
-
-	/* parse out the ESP code */
-	if (*event++ != IR_ARG_INT) {
-		/* not an integer argument, so give up */
-		return -1;
-	}
-	*esp_code = get_unaligned_be32(event);
-	event += 4;
-
-	/* parse out the event description */
-	if (*event++ != IR_ARG_ASCII) {
-		/* not an ASCII string, so give up */
-		return -1;
-	}
-	event[CHUNKSIZE-1] = '\0';	/* ensure this string ends! */
-	event += 2; 			/* skip leading CR/LF */
-	desc_end = desc + sprintf(desc, "%s", event);
-
-	/* strip trailing CR/LF (if any) */
-	for (desc_end--;
-	     (desc_end != desc) && ((*desc_end == 0xd) || (*desc_end == 0xa));
-	     desc_end--) {
-		*desc_end = '\0';
-	}
-
-	return 0;
-}
-
-
-/*
- * scdrv_event_severity
- *
- * Figure out how urgent a message we should write to the console/syslog
- * via printk.
- */
-static char *
-scdrv_event_severity(int code)
-{
-	int ev_class = (code & EV_CLASS_MASK);
-	int ev_severity = (code & EV_SEVERITY_MASK);
-	char *pk_severity = KERN_NOTICE;
-
-	switch (ev_class) {
-	case EV_CLASS_POWER:
-		switch (ev_severity) {
-		case EV_SEVERITY_POWER_LOW_WARNING:
-		case EV_SEVERITY_POWER_HIGH_WARNING:
-			pk_severity = KERN_WARNING;
-			break;
-		case EV_SEVERITY_POWER_HIGH_FAULT:
-		case EV_SEVERITY_POWER_LOW_FAULT:
-			pk_severity = KERN_ALERT;
-			break;
-		}
-		break;
-	case EV_CLASS_FAN:
-		switch (ev_severity) {
-		case EV_SEVERITY_FAN_WARNING:
-			pk_severity = KERN_WARNING;
-			break;
-		case EV_SEVERITY_FAN_FAULT:
-			pk_severity = KERN_CRIT;
-			break;
-		}
-		break;
-	case EV_CLASS_TEMP:
-		switch (ev_severity) {
-		case EV_SEVERITY_TEMP_ADVISORY:
-			pk_severity = KERN_WARNING;
-			break;
-		case EV_SEVERITY_TEMP_CRITICAL:
-			pk_severity = KERN_CRIT;
-			break;
-		case EV_SEVERITY_TEMP_FAULT:
-			pk_severity = KERN_ALERT;
-			break;
-		}
-		break;
-	case EV_CLASS_ENV:
-		pk_severity = KERN_ALERT;
-		break;
-	case EV_CLASS_TEST_FAULT:
-		pk_severity = KERN_ALERT;
-		break;
-	case EV_CLASS_TEST_WARNING:
-		pk_severity = KERN_WARNING;
-		break;
-	case EV_CLASS_PWRD_NOTIFY:
-		pk_severity = KERN_ALERT;
-		break;
-	}
-
-	return pk_severity;
-}
-
-
-/*
- * scdrv_dispatch_event
- *
- * Do the right thing with an incoming event.  That's often nothing
- * more than printing it to the system log.  For power-down notifications
- * we start a graceful shutdown.
- */
-static void
-scdrv_dispatch_event(char *event, int len)
-{
-	static int snsc_shutting_down = 0;
-	int code, esp_code, src, class;
-	char desc[CHUNKSIZE];
-	char *severity;
-
-	if (scdrv_parse_event(event, &src, &code, &esp_code, desc) < 0) {
-		/* ignore uninterpretible event */
-		return;
-	}
-
-	/* how urgent is the message? */
-	severity = scdrv_event_severity(code);
-
-	class = (code & EV_CLASS_MASK);
-
-	if (class == EV_CLASS_PWRD_NOTIFY || code == ENV_PWRDN_PEND) {
-		if (snsc_shutting_down)
-			return;
-
-		snsc_shutting_down = 1;
-
-		/* give a message for each type of event */
-		if (class == EV_CLASS_PWRD_NOTIFY)
-			printk(KERN_NOTICE "Power off indication received."
-			       " Sending SIGPWR to init...\n");
-		else if (code == ENV_PWRDN_PEND)
-			printk(KERN_CRIT "WARNING: Shutting down the system"
-			       " due to a critical environmental condition."
-			       " Sending SIGPWR to init...\n");
-
-		/* give a SIGPWR signal to init proc */
-		kill_cad_pid(SIGPWR, 0);
-	} else {
-		/* print to system log */
-		printk("%s|$(0x%x)%s\n", severity, esp_code, desc);
-	}
-}
-
-
-/*
- * scdrv_event
- *
- * Called as a tasklet when an event arrives from the L1.  Read the event
- * from where it's temporarily stored in SAL and call scdrv_dispatch_event()
- * to send it on its way.  Keep trying to read events until SAL indicates
- * that there are no more immediately available.
- */
-void
-scdrv_event(unsigned long dummy)
-{
-	int status;
-	int len;
-	unsigned long flags;
-	struct subch_data_s *sd = event_sd;
-
-	/* anything to read? */
-	len = CHUNKSIZE;
-	spin_lock_irqsave(&sd->sd_rlock, flags);
-	status = ia64_sn_irtr_recv(sd->sd_nasid, sd->sd_subch,
-				   sd->sd_rb, &len);
-
-	while (!(status < 0)) {
-		spin_unlock_irqrestore(&sd->sd_rlock, flags);
-		scdrv_dispatch_event(sd->sd_rb, len);
-		len = CHUNKSIZE;
-		spin_lock_irqsave(&sd->sd_rlock, flags);
-		status = ia64_sn_irtr_recv(sd->sd_nasid, sd->sd_subch,
-					   sd->sd_rb, &len);
-	}
-	spin_unlock_irqrestore(&sd->sd_rlock, flags);
-}
-
-
-/*
- * scdrv_event_init
- *
- * Sets up a system controller subchannel to begin receiving event
- * messages. This is sort of a specialized version of scdrv_open()
- * in drivers/char/sn_sysctl.c.
- */
-void
-scdrv_event_init(struct sysctl_data_s *scd)
-{
-	int rv;
-
-	event_sd = kzalloc(sizeof (struct subch_data_s), GFP_KERNEL);
-	if (event_sd == NULL) {
-		printk(KERN_WARNING "%s: couldn't allocate subchannel info"
-		       " for event monitoring\n", __func__);
-		return;
-	}
-
-	/* initialize subch_data_s fields */
-	event_sd->sd_nasid = scd->scd_nasid;
-	spin_lock_init(&event_sd->sd_rlock);
-
-	/* ask the system controllers to send events to this node */
-	event_sd->sd_subch = ia64_sn_sysctl_event_init(scd->scd_nasid);
-
-	if (event_sd->sd_subch < 0) {
-		kfree(event_sd);
-		printk(KERN_WARNING "%s: couldn't open event subchannel\n",
-		       __func__);
-		return;
-	}
-
-	/* hook event subchannel up to the system controller interrupt */
-	rv = request_irq(SGI_UART_VECTOR, scdrv_event_interrupt,
-			 IRQF_SHARED, "system controller events", event_sd);
-	if (rv) {
-		printk(KERN_WARNING "%s: irq request failed (%d)\n",
-		       __func__, rv);
-		ia64_sn_irtr_close(event_sd->sd_nasid, event_sd->sd_subch);
-		kfree(event_sd);
-		return;
-	}
-}
diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 9eada392df15..1c227ea8ecd3 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -567,15 +567,6 @@ config BLK_DEV_SVWKS
 	  This driver adds PIO/(U)DMA support for the ServerWorks OSB4/CSB5
 	  chipsets.
 
-config BLK_DEV_SGIIOC4
-	tristate "Silicon Graphics IOC4 chipset ATA/ATAPI support"
-	depends on (IA64_SGI_SN2 || IA64_GENERIC) && SGI_IOC4
-	select BLK_DEV_IDEDMA_PCI
-	help
-	  This driver adds PIO & MultiMode DMA-2 support for the SGI IOC4
-	  chipset, which has one channel and can support two devices.
-	  Please say Y here if you have an Altix System from SGI.
-
 config BLK_DEV_SIIMAGE
 	tristate "Silicon Image chipset support"
 	select BLK_DEV_IDEDMA_PCI
diff --git a/drivers/ide/Makefile b/drivers/ide/Makefile
index 9f617a77970f..cac02db4098d 100644
--- a/drivers/ide/Makefile
+++ b/drivers/ide/Makefile
@@ -59,7 +59,6 @@ obj-$(CONFIG_BLK_DEV_PDC202XX_NEW)	+= pdc202xx_new.o
 obj-$(CONFIG_BLK_DEV_PIIX)		+= piix.o
 obj-$(CONFIG_BLK_DEV_RZ1000)		+= rz1000.o
 obj-$(CONFIG_BLK_DEV_SVWKS)		+= serverworks.o
-obj-$(CONFIG_BLK_DEV_SGIIOC4)		+= sgiioc4.o
 obj-$(CONFIG_BLK_DEV_SIIMAGE)		+= siimage.o
 obj-$(CONFIG_BLK_DEV_SIS5513)		+= sis5513.o
 obj-$(CONFIG_BLK_DEV_SL82C105)		+= sl82c105.o
diff --git a/drivers/ide/sgiioc4.c b/drivers/ide/sgiioc4.c
deleted file mode 100644
index 2d35e9f7516f..000000000000
--- a/drivers/ide/sgiioc4.c
+++ /dev/null
@@ -1,630 +0,0 @@
-/*
- * Copyright (c) 2003-2006 Silicon Graphics, Inc.  All Rights Reserved.
- * Copyright (C) 2008-2009 MontaVista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/NoticeExplan
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
-#include <linux/scatterlist.h>
-#include <linux/ioc4.h>
-#include <linux/io.h>
-#include <linux/ide.h>
-
-#define DRV_NAME "SGIIOC4"
-
-/* IOC4 Specific Definitions */
-#define IOC4_CMD_OFFSET		0x100
-#define IOC4_CTRL_OFFSET	0x120
-#define IOC4_DMA_OFFSET		0x140
-#define IOC4_INTR_OFFSET	0x0
-
-#define IOC4_TIMING		0x00
-#define IOC4_DMA_PTR_L		0x01
-#define IOC4_DMA_PTR_H		0x02
-#define IOC4_DMA_ADDR_L		0x03
-#define IOC4_DMA_ADDR_H		0x04
-#define IOC4_BC_DEV		0x05
-#define IOC4_BC_MEM		0x06
-#define	IOC4_DMA_CTRL		0x07
-#define	IOC4_DMA_END_ADDR	0x08
-
-/* Bits in the IOC4 Control/Status Register */
-#define	IOC4_S_DMA_START	0x01
-#define	IOC4_S_DMA_STOP		0x02
-#define	IOC4_S_DMA_DIR		0x04
-#define	IOC4_S_DMA_ACTIVE	0x08
-#define	IOC4_S_DMA_ERROR	0x10
-#define	IOC4_ATA_MEMERR		0x02
-
-/* Read/Write Directions */
-#define	IOC4_DMA_WRITE		0x04
-#define	IOC4_DMA_READ		0x00
-
-/* Interrupt Register Offsets */
-#define IOC4_INTR_REG		0x03
-#define	IOC4_INTR_SET		0x05
-#define	IOC4_INTR_CLEAR		0x07
-
-#define IOC4_IDE_CACHELINE_SIZE	128
-#define IOC4_CMD_CTL_BLK_SIZE	0x20
-#define IOC4_SUPPORTED_FIRMWARE_REV 46
-
-struct ioc4_dma_regs {
-	u32 timing_reg0;
-	u32 timing_reg1;
-	u32 low_mem_ptr;
-	u32 high_mem_ptr;
-	u32 low_mem_addr;
-	u32 high_mem_addr;
-	u32 dev_byte_count;
-	u32 mem_byte_count;
-	u32 status;
-};
-
-/* Each Physical Region Descriptor Entry size is 16 bytes (2 * 64 bits) */
-/* IOC4 has only 1 IDE channel */
-#define IOC4_PRD_BYTES		16
-#define IOC4_PRD_ENTRIES	(PAGE_SIZE / (4 * IOC4_PRD_BYTES))
-
-
-static void sgiioc4_init_hwif_ports(struct ide_hw *hw,
-				    unsigned long data_port,
-				    unsigned long ctrl_port,
-				    unsigned long irq_port)
-{
-	unsigned long reg = data_port;
-	int i;
-
-	/* Registers are word (32 bit) aligned */
-	for (i = 0; i <= 7; i++)
-		hw->io_ports_array[i] = reg + i * 4;
-
-	hw->io_ports.ctl_addr = ctrl_port;
-	hw->io_ports.irq_addr = irq_port;
-}
-
-static int sgiioc4_checkirq(ide_hwif_t *hwif)
-{
-	unsigned long intr_addr = hwif->io_ports.irq_addr + IOC4_INTR_REG * 4;
-
-	if (readl((void __iomem *)intr_addr) & 0x03)
-		return 1;
-
-	return 0;
-}
-
-static u8 sgiioc4_read_status(ide_hwif_t *);
-
-static int sgiioc4_clearirq(ide_drive_t *drive)
-{
-	u32 intr_reg;
-	ide_hwif_t *hwif = drive->hwif;
-	struct ide_io_ports *io_ports = &hwif->io_ports;
-	unsigned long other_ir = io_ports->irq_addr + (IOC4_INTR_REG << 2);
-
-	/* Code to check for PCI error conditions */
-	intr_reg = readl((void __iomem *)other_ir);
-	if (intr_reg & 0x03) { /* Valid IOC4-IDE interrupt */
-		/*
-		 * Using sgiioc4_read_status to read the Status register has a
-		 * side effect of clearing the interrupt.  The first read should
-		 * clear it if it is set.  The second read should return
-		 * a "clear" status if it got cleared.  If not, then spin
-		 * for a bit trying to clear it.
-		 */
-		u8 stat = sgiioc4_read_status(hwif);
-		int count = 0;
-
-		stat = sgiioc4_read_status(hwif);
-		while ((stat & ATA_BUSY) && (count++ < 100)) {
-			udelay(1);
-			stat = sgiioc4_read_status(hwif);
-		}
-
-		if (intr_reg & 0x02) {
-			struct pci_dev *dev = to_pci_dev(hwif->dev);
-			/* Error when transferring DMA data on PCI bus */
-			u32 pci_err_addr_low, pci_err_addr_high,
-			    pci_stat_cmd_reg;
-
-			pci_err_addr_low =
-				readl((void __iomem *)io_ports->irq_addr);
-			pci_err_addr_high =
-				readl((void __iomem *)(io_ports->irq_addr + 4));
-			pci_read_config_dword(dev, PCI_COMMAND,
-					      &pci_stat_cmd_reg);
-			printk(KERN_ERR "%s(%s): PCI Bus Error when doing DMA: "
-			       "status-cmd reg is 0x%x\n",
-			       __func__, drive->name, pci_stat_cmd_reg);
-			printk(KERN_ERR "%s(%s): PCI Error Address is 0x%x%x\n",
-			       __func__, drive->name,
-			       pci_err_addr_high, pci_err_addr_low);
-			/* Clear the PCI Error indicator */
-			pci_write_config_dword(dev, PCI_COMMAND, 0x00000146);
-		}
-
-		/* Clear the Interrupt, Error bits on the IOC4 */
-		writel(0x03, (void __iomem *)other_ir);
-
-		intr_reg = readl((void __iomem *)other_ir);
-	}
-
-	return intr_reg & 3;
-}
-
-static void sgiioc4_dma_start(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	unsigned long ioc4_dma_addr = hwif->dma_base + IOC4_DMA_CTRL * 4;
-	unsigned int reg = readl((void __iomem *)ioc4_dma_addr);
-	unsigned int temp_reg = reg | IOC4_S_DMA_START;
-
-	writel(temp_reg, (void __iomem *)ioc4_dma_addr);
-}
-
-static u32 sgiioc4_ide_dma_stop(ide_hwif_t *hwif, u64 dma_base)
-{
-	unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
-	u32	ioc4_dma;
-	int	count;
-
-	count = 0;
-	ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
-	while ((ioc4_dma & IOC4_S_DMA_STOP) && (count++ < 200)) {
-		udelay(1);
-		ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
-	}
-	return ioc4_dma;
-}
-
-/* Stops the IOC4 DMA Engine */
-static int sgiioc4_dma_end(ide_drive_t *drive)
-{
-	u32 ioc4_dma, bc_dev, bc_mem, num, valid = 0, cnt = 0;
-	ide_hwif_t *hwif = drive->hwif;
-	unsigned long dma_base = hwif->dma_base;
-	int dma_stat = 0;
-	unsigned long *ending_dma = ide_get_hwifdata(hwif);
-
-	writel(IOC4_S_DMA_STOP, (void __iomem *)(dma_base + IOC4_DMA_CTRL * 4));
-
-	ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
-
-	if (ioc4_dma & IOC4_S_DMA_STOP) {
-		printk(KERN_ERR
-		       "%s(%s): IOC4 DMA STOP bit is still 1 :"
-		       "ioc4_dma_reg 0x%x\n",
-		       __func__, drive->name, ioc4_dma);
-		dma_stat = 1;
-	}
-
-	/*
-	 * The IOC4 will DMA 1's to the ending DMA area to indicate that
-	 * previous data DMA is complete.  This is necessary because of relaxed
-	 * ordering between register reads and DMA writes on the Altix.
-	 */
-	while ((cnt++ < 200) && (!valid)) {
-		for (num = 0; num < 16; num++) {
-			if (ending_dma[num]) {
-				valid = 1;
-				break;
-			}
-		}
-		udelay(1);
-	}
-	if (!valid) {
-		printk(KERN_ERR "%s(%s) : DMA incomplete\n", __func__,
-		       drive->name);
-		dma_stat = 1;
-	}
-
-	bc_dev = readl((void __iomem *)(dma_base + IOC4_BC_DEV * 4));
-	bc_mem = readl((void __iomem *)(dma_base + IOC4_BC_MEM * 4));
-
-	if ((bc_dev & 0x01FF) || (bc_mem & 0x1FF)) {
-		if (bc_dev > bc_mem + 8) {
-			printk(KERN_ERR
-			       "%s(%s): WARNING!! byte_count_dev %d "
-			       "!= byte_count_mem %d\n",
-			       __func__, drive->name, bc_dev, bc_mem);
-		}
-	}
-
-	return dma_stat;
-}
-
-static void sgiioc4_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
-{
-}
-
-/* Returns 1 if DMA IRQ issued, 0 otherwise */
-static int sgiioc4_dma_test_irq(ide_drive_t *drive)
-{
-	return sgiioc4_checkirq(drive->hwif);
-}
-
-static void sgiioc4_dma_host_set(ide_drive_t *drive, int on)
-{
-	if (!on)
-		sgiioc4_clearirq(drive);
-}
-
-static void sgiioc4_resetproc(ide_drive_t *drive)
-{
-	struct ide_cmd *cmd = &drive->hwif->cmd;
-
-	sgiioc4_dma_end(drive);
-	ide_dma_unmap_sg(drive, cmd);
-	sgiioc4_clearirq(drive);
-}
-
-static void sgiioc4_dma_lost_irq(ide_drive_t *drive)
-{
-	sgiioc4_resetproc(drive);
-
-	ide_dma_lost_irq(drive);
-}
-
-static u8 sgiioc4_read_status(ide_hwif_t *hwif)
-{
-	unsigned long port = hwif->io_ports.status_addr;
-	u8 reg = (u8) readb((void __iomem *) port);
-
-	if (!(reg & ATA_BUSY)) {	/* Not busy... check for interrupt */
-		unsigned long other_ir = port - 0x110;
-		unsigned int intr_reg = (u32) readl((void __iomem *) other_ir);
-
-		/* Clear the Interrupt, Error bits on the IOC4 */
-		if (intr_reg & 0x03) {
-			writel(0x03, (void __iomem *) other_ir);
-			intr_reg = (u32) readl((void __iomem *) other_ir);
-		}
-	}
-
-	return reg;
-}
-
-/* Creates a DMA map for the scatter-gather list entries */
-static int ide_dma_sgiioc4(ide_hwif_t *hwif, const struct ide_port_info *d)
-{
-	struct pci_dev *dev = to_pci_dev(hwif->dev);
-	unsigned long dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET;
-	int num_ports = sizeof(struct ioc4_dma_regs);
-	void *pad;
-
-	printk(KERN_INFO "    %s: MMIO-DMA\n", hwif->name);
-
-	if (request_mem_region(dma_base, num_ports, hwif->name) == NULL) {
-		printk(KERN_ERR "%s(%s) -- ERROR: addresses 0x%08lx to 0x%08lx "
-		       "already in use\n", __func__, hwif->name,
-		       dma_base, dma_base + num_ports - 1);
-		return -1;
-	}
-
-	hwif->dma_base = (unsigned long)hwif->io_ports.irq_addr +
-			 IOC4_DMA_OFFSET;
-
-	hwif->sg_max_nents = IOC4_PRD_ENTRIES;
-
-	hwif->prd_max_nents = IOC4_PRD_ENTRIES;
-	hwif->prd_ent_size = IOC4_PRD_BYTES;
-
-	if (ide_allocate_dma_engine(hwif))
-		goto dma_pci_alloc_failure;
-
-	pad = dma_alloc_coherent(&dev->dev, IOC4_IDE_CACHELINE_SIZE,
-				   (dma_addr_t *)&hwif->extra_base, GFP_KERNEL);
-	if (pad) {
-		ide_set_hwifdata(hwif, pad);
-		return 0;
-	}
-
-	ide_release_dma_engine(hwif);
-
-	printk(KERN_ERR "%s(%s) -- ERROR: Unable to allocate DMA maps\n",
-	       __func__, hwif->name);
-	printk(KERN_INFO "%s: changing from DMA to PIO mode", hwif->name);
-
-dma_pci_alloc_failure:
-	release_mem_region(dma_base, num_ports);
-
-	return -1;
-}
-
-/* Initializes the IOC4 DMA Engine */
-static void sgiioc4_configure_for_dma(int dma_direction, ide_drive_t *drive)
-{
-	u32 ioc4_dma;
-	ide_hwif_t *hwif = drive->hwif;
-	unsigned long dma_base = hwif->dma_base;
-	unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
-	u32 dma_addr, ending_dma_addr;
-
-	ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
-
-	if (ioc4_dma & IOC4_S_DMA_ACTIVE) {
-		printk(KERN_WARNING "%s(%s): Warning!! DMA from previous "
-		       "transfer was still active\n", __func__, drive->name);
-		writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
-		ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
-
-		if (ioc4_dma & IOC4_S_DMA_STOP)
-			printk(KERN_ERR "%s(%s): IOC4 DMA STOP bit is "
-			       "still 1\n", __func__, drive->name);
-	}
-
-	ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
-	if (ioc4_dma & IOC4_S_DMA_ERROR) {
-		printk(KERN_WARNING "%s(%s): Warning!! DMA Error during "
-		       "previous transfer, status 0x%x\n",
-		       __func__, drive->name, ioc4_dma);
-		writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
-		ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
-
-		if (ioc4_dma & IOC4_S_DMA_STOP)
-			printk(KERN_ERR "%s(%s): IOC4 DMA STOP bit is "
-			       "still 1\n", __func__, drive->name);
-	}
-
-	/* Address of the Scatter Gather List */
-	dma_addr = cpu_to_le32(hwif->dmatable_dma);
-	writel(dma_addr, (void __iomem *)(dma_base + IOC4_DMA_PTR_L * 4));
-
-	/* Address of the Ending DMA */
-	memset(ide_get_hwifdata(hwif), 0, IOC4_IDE_CACHELINE_SIZE);
-	ending_dma_addr = cpu_to_le32(hwif->extra_base);
-	writel(ending_dma_addr, (void __iomem *)(dma_base +
-						 IOC4_DMA_END_ADDR * 4));
-
-	writel(dma_direction, (void __iomem *)ioc4_dma_addr);
-}
-
-/* IOC4 Scatter Gather list Format					 */
-/* 128 Bit entries to support 64 bit addresses in the future		 */
-/* The Scatter Gather list Entry should be in the BIG-ENDIAN Format	 */
-/* --------------------------------------------------------------------- */
-/* | Upper 32 bits - Zero	    |		Lower 32 bits- address | */
-/* --------------------------------------------------------------------- */
-/* | Upper 32 bits - Zero	    |EOL| 15 unused     | 16 Bit Length| */
-/* --------------------------------------------------------------------- */
-/* Creates the scatter gather list, DMA Table				 */
-
-static int sgiioc4_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	unsigned int *table = hwif->dmatable_cpu;
-	unsigned int count = 0, i = cmd->sg_nents;
-	struct scatterlist *sg = hwif->sg_table;
-
-	while (i && sg_dma_len(sg)) {
-		dma_addr_t cur_addr;
-		int cur_len;
-		cur_addr = sg_dma_address(sg);
-		cur_len = sg_dma_len(sg);
-
-		while (cur_len) {
-			if (count++ >= IOC4_PRD_ENTRIES) {
-				printk(KERN_WARNING
-				       "%s: DMA table too small\n",
-				       drive->name);
-				return 0;
-			} else {
-				u32 bcount =
-				    0x10000 - (cur_addr & 0xffff);
-
-				if (bcount > cur_len)
-					bcount = cur_len;
-
-				/*
-				 * Put the address, length in
-				 * the IOC4 dma-table format
-				 */
-				*table = 0x0;
-				table++;
-				*table = cpu_to_be32(cur_addr);
-				table++;
-				*table = 0x0;
-				table++;
-
-				*table = cpu_to_be32(bcount);
-				table++;
-
-				cur_addr += bcount;
-				cur_len -= bcount;
-			}
-		}
-
-		sg = sg_next(sg);
-		i--;
-	}
-
-	if (count) {
-		table--;
-		*table |= cpu_to_be32(0x80000000);
-		return count;
-	}
-
-	return 0;		/* revert to PIO for this request */
-}
-
-static int sgiioc4_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
-{
-	int ddir;
-	u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
-
-	if (sgiioc4_build_dmatable(drive, cmd) == 0)
-		/* try PIO instead of DMA */
-		return 1;
-
-	if (write)
-		/* Writes TO the IOC4 FROM Main Memory */
-		ddir = IOC4_DMA_READ;
-	else
-		/* Writes FROM the IOC4 TO Main Memory */
-		ddir = IOC4_DMA_WRITE;
-
-	sgiioc4_configure_for_dma(ddir, drive);
-
-	return 0;
-}
-
-static const struct ide_tp_ops sgiioc4_tp_ops = {
-	.exec_command		= ide_exec_command,
-	.read_status		= sgiioc4_read_status,
-	.read_altstatus		= ide_read_altstatus,
-	.write_devctl		= ide_write_devctl,
-
-	.dev_select		= ide_dev_select,
-	.tf_load		= ide_tf_load,
-	.tf_read		= ide_tf_read,
-
-	.input_data		= ide_input_data,
-	.output_data		= ide_output_data,
-};
-
-static const struct ide_port_ops sgiioc4_port_ops = {
-	.set_dma_mode		= sgiioc4_set_dma_mode,
-	/* reset DMA engine, clear IRQs */
-	.resetproc		= sgiioc4_resetproc,
-};
-
-static const struct ide_dma_ops sgiioc4_dma_ops = {
-	.dma_host_set		= sgiioc4_dma_host_set,
-	.dma_setup		= sgiioc4_dma_setup,
-	.dma_start		= sgiioc4_dma_start,
-	.dma_end		= sgiioc4_dma_end,
-	.dma_test_irq		= sgiioc4_dma_test_irq,
-	.dma_lost_irq		= sgiioc4_dma_lost_irq,
-};
-
-static const struct ide_port_info sgiioc4_port_info = {
-	.name			= DRV_NAME,
-	.chipset		= ide_pci,
-	.init_dma		= ide_dma_sgiioc4,
-	.tp_ops			= &sgiioc4_tp_ops,
-	.port_ops		= &sgiioc4_port_ops,
-	.dma_ops		= &sgiioc4_dma_ops,
-	.host_flags		= IDE_HFLAG_MMIO,
-	.irq_flags		= IRQF_SHARED,
-	.mwdma_mask		= ATA_MWDMA2_ONLY,
-};
-
-static int sgiioc4_ide_setup_pci_device(struct pci_dev *dev)
-{
-	unsigned long cmd_base, irqport;
-	unsigned long bar0, cmd_phys_base, ctl;
-	void __iomem *virt_base;
-	struct ide_hw hw, *hws[] = { &hw };
-	int rc;
-
-	/* Get the CmdBlk and CtrlBlk base registers */
-	bar0 = pci_resource_start(dev, 0);
-	virt_base = pci_ioremap_bar(dev, 0);
-	if (virt_base == NULL) {
-		printk(KERN_ERR "%s: Unable to remap BAR 0 address: 0x%lx\n",
-				DRV_NAME, bar0);
-		return -ENOMEM;
-	}
-	cmd_base = (unsigned long)virt_base + IOC4_CMD_OFFSET;
-	ctl = (unsigned long)virt_base + IOC4_CTRL_OFFSET;
-	irqport = (unsigned long)virt_base + IOC4_INTR_OFFSET;
-
-	cmd_phys_base = bar0 + IOC4_CMD_OFFSET;
-	if (request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE,
-			       DRV_NAME) == NULL) {
-		printk(KERN_ERR "%s %s -- ERROR: addresses 0x%08lx to 0x%08lx "
-		       "already in use\n", DRV_NAME, pci_name(dev),
-		       cmd_phys_base, cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE);
-		rc = -EBUSY;
-		goto req_mem_rgn_err;
-	}
-
-	/* Initialize the IO registers */
-	memset(&hw, 0, sizeof(hw));
-	sgiioc4_init_hwif_ports(&hw, cmd_base, ctl, irqport);
-	hw.irq = dev->irq;
-	hw.dev = &dev->dev;
-
-	/* Initialize chipset IRQ registers */
-	writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4));
-
-	rc = ide_host_add(&sgiioc4_port_info, hws, 1, NULL);
-	if (!rc)
-		return 0;
-
-	release_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE);
-req_mem_rgn_err:
-	iounmap(virt_base);
-	return rc;
-}
-
-static unsigned int pci_init_sgiioc4(struct pci_dev *dev)
-{
-	int ret;
-
-	printk(KERN_INFO "%s: IDE controller at PCI slot %s, revision %d\n",
-			 DRV_NAME, pci_name(dev), dev->revision);
-
-	if (dev->revision < IOC4_SUPPORTED_FIRMWARE_REV) {
-		printk(KERN_ERR "Skipping %s IDE controller in slot %s: "
-				"firmware is obsolete - please upgrade to "
-				"revision46 or higher\n",
-				DRV_NAME, pci_name(dev));
-		ret = -EAGAIN;
-		goto out;
-	}
-	ret = sgiioc4_ide_setup_pci_device(dev);
-out:
-	return ret;
-}
-
-static int ioc4_ide_attach_one(struct ioc4_driver_data *idd)
-{
-	/*
-	 * PCI-RT does not bring out IDE connection.
-	 * Do not attach to this particular IOC4.
-	 */
-	if (idd->idd_variant == IOC4_VARIANT_PCI_RT)
-		return 0;
-
-	return pci_init_sgiioc4(idd->idd_pdev);
-}
-
-static struct ioc4_submodule ioc4_ide_submodule = {
-	.is_name = "IOC4_ide",
-	.is_owner = THIS_MODULE,
-	.is_probe = ioc4_ide_attach_one,
-};
-
-static int __init ioc4_ide_init(void)
-{
-	return ioc4_register_submodule(&ioc4_ide_submodule);
-}
-
-late_initcall(ioc4_ide_init); /* Call only after IDE init is done */
-
-MODULE_AUTHOR("Aniket Malatpure/Jeremy Higdon");
-MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card");
-MODULE_LICENSE("GPL");
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index a4ddeade8ac4..e3842eabcfdd 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -177,7 +177,7 @@ config DMAR_TABLE
 
 config INTEL_IOMMU
 	bool "Support for Intel IOMMU using DMA Remapping Devices"
-	depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
+	depends on PCI_MSI && ACPI && (X86 || IA64)
 	select IOMMU_API
 	select IOMMU_IOVA
 	select NEED_DMA_MAP_STATE
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 16900357afc2..45b61b8d8442 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -126,18 +126,6 @@ config INTEL_MID_PTI
 	  an Intel Atom (non-netbook) mobile device containing a MIPI
 	  P1149.7 standard implementation.
 
-config SGI_IOC4
-	tristate "SGI IOC4 Base IO support"
-	depends on PCI
-	---help---
-	  This option enables basic support for the IOC4 chip on certain
-	  SGI IO controller cards (IO9, IO10, and PCI-RT).  This option
-	  does not enable any specific functions on such a card, but provides
-	  necessary infrastructure for other drivers to utilize.
-
-	  If you have an SGI Altix with an IOC4-based card say Y.
-	  Otherwise say N.
-
 config TIFM_CORE
 	tristate "TI Flash Media interface support"
 	depends on PCI
@@ -200,9 +188,8 @@ config ENCLOSURE_SERVICES
 config SGI_XP
 	tristate "Support communication between SGI SSIs"
 	depends on NET
-	depends on (IA64_GENERIC || IA64_SGI_SN2 || IA64_SGI_UV || X86_UV) && SMP
-	select IA64_UNCACHED_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
-	select GENERIC_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+	depends on (IA64_SGI_UV || X86_UV) && SMP
+	depends on X86_64 || BROKEN
 	select SGI_GRU if X86_64 && SMP
 	---help---
 	  An SGI machine can be divided into multiple Single System
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index abd8ae249746..8dae0a976200 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -21,7 +21,6 @@ obj-$(CONFIG_QCOM_COINCELL)	+= qcom-coincell.o
 obj-$(CONFIG_QCOM_FASTRPC)	+= fastrpc.o
 obj-$(CONFIG_SENSORS_BH1770)	+= bh1770glc.o
 obj-$(CONFIG_SENSORS_APDS990X)	+= apds990x.o
-obj-$(CONFIG_SGI_IOC4)		+= ioc4.o
 obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
 obj-$(CONFIG_KGDB_TESTS)	+= kgdbts.o
 obj-$(CONFIG_SGI_XP)		+= sgi-xp/
diff --git a/drivers/misc/ioc4.c b/drivers/misc/ioc4.c
deleted file mode 100644
index 9d0445a567db..000000000000
--- a/drivers/misc/ioc4.c
+++ /dev/null
@@ -1,498 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2005-2006 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-/* This file contains the master driver module for use by SGI IOC4 subdrivers.
- *
- * It allocates any resources shared between multiple subdevices, and
- * provides accessor functions (where needed) and the like for those
- * resources.  It also provides a mechanism for the subdevice modules
- * to support loading and unloading.
- *
- * Non-shared resources (e.g. external interrupt A_INT_OUT register page
- * alias, serial port and UART registers) are handled by the subdevice
- * modules themselves.
- *
- * This is all necessary because IOC4 is not implemented as a multi-function
- * PCI device, but an amalgamation of disparate registers for several
- * types of device (ATA, serial, external interrupts).  The normal
- * resource management in the kernel doesn't have quite the right interfaces
- * to handle this situation (e.g. multiple modules can't claim the same
- * PCI ID), thus this IOC4 master module.
- */
-
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/ioc4.h>
-#include <linux/ktime.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <linux/time.h>
-#include <asm/io.h>
-
-/***************
- * Definitions *
- ***************/
-
-/* Tweakable values */
-
-/* PCI bus speed detection/calibration */
-#define IOC4_CALIBRATE_COUNT 63		/* Calibration cycle period */
-#define IOC4_CALIBRATE_CYCLES 256	/* Average over this many cycles */
-#define IOC4_CALIBRATE_DISCARD 2	/* Discard first few cycles */
-#define IOC4_CALIBRATE_LOW_MHZ 25	/* Lower bound on bus speed sanity */
-#define IOC4_CALIBRATE_HIGH_MHZ 75	/* Upper bound on bus speed sanity */
-#define IOC4_CALIBRATE_DEFAULT_MHZ 66	/* Assumed if sanity check fails */
-
-/************************
- * Submodule management *
- ************************/
-
-static DEFINE_MUTEX(ioc4_mutex);
-
-static LIST_HEAD(ioc4_devices);
-static LIST_HEAD(ioc4_submodules);
-
-/* Register an IOC4 submodule */
-int
-ioc4_register_submodule(struct ioc4_submodule *is)
-{
-	struct ioc4_driver_data *idd;
-
-	mutex_lock(&ioc4_mutex);
-	list_add(&is->is_list, &ioc4_submodules);
-
-	/* Initialize submodule for each IOC4 */
-	if (!is->is_probe)
-		goto out;
-
-	list_for_each_entry(idd, &ioc4_devices, idd_list) {
-		if (is->is_probe(idd)) {
-			printk(KERN_WARNING
-			       "%s: IOC4 submodule %s probe failed "
-			       "for pci_dev %s",
-			       __func__, module_name(is->is_owner),
-			       pci_name(idd->idd_pdev));
-		}
-	}
- out:
-	mutex_unlock(&ioc4_mutex);
-	return 0;
-}
-
-/* Unregister an IOC4 submodule */
-void
-ioc4_unregister_submodule(struct ioc4_submodule *is)
-{
-	struct ioc4_driver_data *idd;
-
-	mutex_lock(&ioc4_mutex);
-	list_del(&is->is_list);
-
-	/* Remove submodule for each IOC4 */
-	if (!is->is_remove)
-		goto out;
-
-	list_for_each_entry(idd, &ioc4_devices, idd_list) {
-		if (is->is_remove(idd)) {
-			printk(KERN_WARNING
-			       "%s: IOC4 submodule %s remove failed "
-			       "for pci_dev %s.\n",
-			       __func__, module_name(is->is_owner),
-			       pci_name(idd->idd_pdev));
-		}
-	}
- out:
-	mutex_unlock(&ioc4_mutex);
-}
-
-/*********************
- * Device management *
- *********************/
-
-#define IOC4_CALIBRATE_LOW_LIMIT \
-	(1000*IOC4_EXTINT_COUNT_DIVISOR/IOC4_CALIBRATE_LOW_MHZ)
-#define IOC4_CALIBRATE_HIGH_LIMIT \
-	(1000*IOC4_EXTINT_COUNT_DIVISOR/IOC4_CALIBRATE_HIGH_MHZ)
-#define IOC4_CALIBRATE_DEFAULT \
-	(1000*IOC4_EXTINT_COUNT_DIVISOR/IOC4_CALIBRATE_DEFAULT_MHZ)
-
-#define IOC4_CALIBRATE_END \
-	(IOC4_CALIBRATE_CYCLES + IOC4_CALIBRATE_DISCARD)
-
-#define IOC4_INT_OUT_MODE_TOGGLE 0x7	/* Toggle INT_OUT every COUNT+1 ticks */
-
-/* Determines external interrupt output clock period of the PCI bus an
- * IOC4 is attached to.  This value can be used to determine the PCI
- * bus speed.
- *
- * IOC4 has a design feature that various internal timers are derived from
- * the PCI bus clock.  This causes IOC4 device drivers to need to take the
- * bus speed into account when setting various register values (e.g. INT_OUT
- * register COUNT field, UART divisors, etc).  Since this information is
- * needed by several subdrivers, it is determined by the main IOC4 driver,
- * even though the following code utilizes external interrupt registers
- * to perform the speed calculation.
- */
-static void
-ioc4_clock_calibrate(struct ioc4_driver_data *idd)
-{
-	union ioc4_int_out int_out;
-	union ioc4_gpcr gpcr;
-	unsigned int state, last_state;
-	uint64_t start, end, period;
-	unsigned int count;
-
-	/* Enable output */
-	gpcr.raw = 0;
-	gpcr.fields.dir = IOC4_GPCR_DIR_0;
-	gpcr.fields.int_out_en = 1;
-	writel(gpcr.raw, &idd->idd_misc_regs->gpcr_s.raw);
-
-	/* Reset to power-on state */
-	writel(0, &idd->idd_misc_regs->int_out.raw);
-
-	/* Set up square wave */
-	int_out.raw = 0;
-	int_out.fields.count = IOC4_CALIBRATE_COUNT;
-	int_out.fields.mode = IOC4_INT_OUT_MODE_TOGGLE;
-	int_out.fields.diag = 0;
-	writel(int_out.raw, &idd->idd_misc_regs->int_out.raw);
-
-	/* Check square wave period averaged over some number of cycles */
-	start = ktime_get_ns();
-	state = 1; /* make sure the first read isn't a rising edge */
-	for (count = 0; count <= IOC4_CALIBRATE_END; count++) {
-		do { /* wait for a rising edge */
-			last_state = state;
-			int_out.raw = readl(&idd->idd_misc_regs->int_out.raw);
-			state = int_out.fields.int_out;
-		} while (last_state || !state);
-
-		/* discard the first few cycles */
-		if (count == IOC4_CALIBRATE_DISCARD)
-			start = ktime_get_ns();
-	}
-	end = ktime_get_ns();
-
-	/* Calculation rearranged to preserve intermediate precision.
-	 * Logically:
-	 * 1. "end - start" gives us the measurement period over all
-	 *    the square wave cycles.
-	 * 2. Divide by number of square wave cycles to get the period
-	 *    of a square wave cycle.
-	 * 3. Divide by 2*(int_out.fields.count+1), which is the formula
-	 *    by which the IOC4 generates the square wave, to get the
-	 *    period of an IOC4 INT_OUT count.
-	 */
-	period = (end - start) /
-		(IOC4_CALIBRATE_CYCLES * 2 * (IOC4_CALIBRATE_COUNT + 1));
-
-	/* Bounds check the result. */
-	if (period > IOC4_CALIBRATE_LOW_LIMIT ||
-	    period < IOC4_CALIBRATE_HIGH_LIMIT) {
-		printk(KERN_INFO
-		       "IOC4 %s: Clock calibration failed.  Assuming"
-		       "PCI clock is %d ns.\n",
-		       pci_name(idd->idd_pdev),
-		       IOC4_CALIBRATE_DEFAULT / IOC4_EXTINT_COUNT_DIVISOR);
-		period = IOC4_CALIBRATE_DEFAULT;
-	} else {
-		u64 ns = period;
-
-		do_div(ns, IOC4_EXTINT_COUNT_DIVISOR);
-		printk(KERN_DEBUG
-		       "IOC4 %s: PCI clock is %llu ns.\n",
-		       pci_name(idd->idd_pdev), (unsigned long long)ns);
-	}
-
-	/* Remember results.  We store the extint clock period rather
-	 * than the PCI clock period so that greater precision is
-	 * retained.  Divide by IOC4_EXTINT_COUNT_DIVISOR to get
-	 * PCI clock period.
-	 */
-	idd->count_period = period;
-}
-
-/* There are three variants of IOC4 cards: IO9, IO10, and PCI-RT.
- * Each brings out different combinations of IOC4 signals, thus.
- * the IOC4 subdrivers need to know to which we're attached.
- *
- * We look for the presence of a SCSI (IO9) or SATA (IO10) controller
- * on the same PCI bus at slot number 3 to differentiate IO9 from IO10.
- * If neither is present, it's a PCI-RT.
- */
-static unsigned int
-ioc4_variant(struct ioc4_driver_data *idd)
-{
-	struct pci_dev *pdev = NULL;
-	int found = 0;
-
-	/* IO9: Look for a QLogic ISP 12160 at the same bus and slot 3. */
-	do {
-		pdev = pci_get_device(PCI_VENDOR_ID_QLOGIC,
-				      PCI_DEVICE_ID_QLOGIC_ISP12160, pdev);
-		if (pdev &&
-		    idd->idd_pdev->bus->number == pdev->bus->number &&
-		    3 == PCI_SLOT(pdev->devfn))
-			found = 1;
-	} while (pdev && !found);
-	if (NULL != pdev) {
-		pci_dev_put(pdev);
-		return IOC4_VARIANT_IO9;
-	}
-
-	/* IO10: Look for a Vitesse VSC 7174 at the same bus and slot 3. */
-	pdev = NULL;
-	do {
-		pdev = pci_get_device(PCI_VENDOR_ID_VITESSE,
-				      PCI_DEVICE_ID_VITESSE_VSC7174, pdev);
-		if (pdev &&
-		    idd->idd_pdev->bus->number == pdev->bus->number &&
-		    3 == PCI_SLOT(pdev->devfn))
-			found = 1;
-	} while (pdev && !found);
-	if (NULL != pdev) {
-		pci_dev_put(pdev);
-		return IOC4_VARIANT_IO10;
-	}
-
-	/* PCI-RT: No SCSI/SATA controller will be present */
-	return IOC4_VARIANT_PCI_RT;
-}
-
-static void
-ioc4_load_modules(struct work_struct *work)
-{
-	request_module("sgiioc4");
-}
-
-static DECLARE_WORK(ioc4_load_modules_work, ioc4_load_modules);
-
-/* Adds a new instance of an IOC4 card */
-static int
-ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
-{
-	struct ioc4_driver_data *idd;
-	struct ioc4_submodule *is;
-	uint32_t pcmd;
-	int ret;
-
-	/* Enable IOC4 and take ownership of it */
-	if ((ret = pci_enable_device(pdev))) {
-		printk(KERN_WARNING
-		       "%s: Failed to enable IOC4 device for pci_dev %s.\n",
-		       __func__, pci_name(pdev));
-		goto out;
-	}
-	pci_set_master(pdev);
-
-	/* Set up per-IOC4 data */
-	idd = kmalloc(sizeof(struct ioc4_driver_data), GFP_KERNEL);
-	if (!idd) {
-		printk(KERN_WARNING
-		       "%s: Failed to allocate IOC4 data for pci_dev %s.\n",
-		       __func__, pci_name(pdev));
-		ret = -ENODEV;
-		goto out_idd;
-	}
-	idd->idd_pdev = pdev;
-	idd->idd_pci_id = pci_id;
-
-	/* Map IOC4 misc registers.  These are shared between subdevices
-	 * so the main IOC4 module manages them.
-	 */
-	idd->idd_bar0 = pci_resource_start(idd->idd_pdev, 0);
-	if (!idd->idd_bar0) {
-		printk(KERN_WARNING
-		       "%s: Unable to find IOC4 misc resource "
-		       "for pci_dev %s.\n",
-		       __func__, pci_name(idd->idd_pdev));
-		ret = -ENODEV;
-		goto out_pci;
-	}
-	if (!request_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs),
-			    "ioc4_misc")) {
-		printk(KERN_WARNING
-		       "%s: Unable to request IOC4 misc region "
-		       "for pci_dev %s.\n",
-		       __func__, pci_name(idd->idd_pdev));
-		ret = -ENODEV;
-		goto out_pci;
-	}
-	idd->idd_misc_regs = ioremap(idd->idd_bar0,
-				     sizeof(struct ioc4_misc_regs));
-	if (!idd->idd_misc_regs) {
-		printk(KERN_WARNING
-		       "%s: Unable to remap IOC4 misc region "
-		       "for pci_dev %s.\n",
-		       __func__, pci_name(idd->idd_pdev));
-		ret = -ENODEV;
-		goto out_misc_region;
-	}
-
-	/* Failsafe portion of per-IOC4 initialization */
-
-	/* Detect card variant */
-	idd->idd_variant = ioc4_variant(idd);
-	printk(KERN_INFO "IOC4 %s: %s card detected.\n", pci_name(pdev),
-	       idd->idd_variant == IOC4_VARIANT_IO9 ? "IO9" :
-	       idd->idd_variant == IOC4_VARIANT_PCI_RT ? "PCI-RT" :
-	       idd->idd_variant == IOC4_VARIANT_IO10 ? "IO10" : "unknown");
-
-	/* Initialize IOC4 */
-	pci_read_config_dword(idd->idd_pdev, PCI_COMMAND, &pcmd);
-	pci_write_config_dword(idd->idd_pdev, PCI_COMMAND,
-			       pcmd | PCI_COMMAND_PARITY | PCI_COMMAND_SERR);
-
-	/* Determine PCI clock */
-	ioc4_clock_calibrate(idd);
-
-	/* Disable/clear all interrupts.  Need to do this here lest
-	 * one submodule request the shared IOC4 IRQ, but interrupt
-	 * is generated by a different subdevice.
-	 */
-	/* Disable */
-	writel(~0, &idd->idd_misc_regs->other_iec.raw);
-	writel(~0, &idd->idd_misc_regs->sio_iec);
-	/* Clear (i.e. acknowledge) */
-	writel(~0, &idd->idd_misc_regs->other_ir.raw);
-	writel(~0, &idd->idd_misc_regs->sio_ir);
-
-	/* Track PCI-device specific data */
-	idd->idd_serial_data = NULL;
-	pci_set_drvdata(idd->idd_pdev, idd);
-
-	mutex_lock(&ioc4_mutex);
-	list_add_tail(&idd->idd_list, &ioc4_devices);
-
-	/* Add this IOC4 to all submodules */
-	list_for_each_entry(is, &ioc4_submodules, is_list) {
-		if (is->is_probe && is->is_probe(idd)) {
-			printk(KERN_WARNING
-			       "%s: IOC4 submodule 0x%s probe failed "
-			       "for pci_dev %s.\n",
-			       __func__, module_name(is->is_owner),
-			       pci_name(idd->idd_pdev));
-		}
-	}
-	mutex_unlock(&ioc4_mutex);
-
-	/* Request sgiioc4 IDE driver on boards that bring that functionality
-	 * off of IOC4.  The root filesystem may be hosted on a drive connected
-	 * to IOC4, so we need to make sure the sgiioc4 driver is loaded as it
-	 * won't be picked up by modprobes due to the ioc4 module owning the
-	 * PCI device.
-	 */
-	if (idd->idd_variant != IOC4_VARIANT_PCI_RT) {
-		/* Request the module from a work procedure as the modprobe
-		 * goes out to a userland helper and that will hang if done
-		 * directly from ioc4_probe().
-		 */
-		printk(KERN_INFO "IOC4 loading sgiioc4 submodule\n");
-		schedule_work(&ioc4_load_modules_work);
-	}
-
-	return 0;
-
-out_misc_region:
-	release_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs));
-out_pci:
-	kfree(idd);
-out_idd:
-	pci_disable_device(pdev);
-out:
-	return ret;
-}
-
-/* Removes a particular instance of an IOC4 card. */
-static void
-ioc4_remove(struct pci_dev *pdev)
-{
-	struct ioc4_submodule *is;
-	struct ioc4_driver_data *idd;
-
-	idd = pci_get_drvdata(pdev);
-
-	/* Remove this IOC4 from all submodules */
-	mutex_lock(&ioc4_mutex);
-	list_for_each_entry(is, &ioc4_submodules, is_list) {
-		if (is->is_remove && is->is_remove(idd)) {
-			printk(KERN_WARNING
-			       "%s: IOC4 submodule 0x%s remove failed "
-			       "for pci_dev %s.\n",
-			       __func__, module_name(is->is_owner),
-			       pci_name(idd->idd_pdev));
-		}
-	}
-	mutex_unlock(&ioc4_mutex);
-
-	/* Release resources */
-	iounmap(idd->idd_misc_regs);
-	if (!idd->idd_bar0) {
-		printk(KERN_WARNING
-		       "%s: Unable to get IOC4 misc mapping for pci_dev %s. "
-		       "Device removal may be incomplete.\n",
-		       __func__, pci_name(idd->idd_pdev));
-	}
-	release_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs));
-
-	/* Disable IOC4 and relinquish */
-	pci_disable_device(pdev);
-
-	/* Remove and free driver data */
-	mutex_lock(&ioc4_mutex);
-	list_del(&idd->idd_list);
-	mutex_unlock(&ioc4_mutex);
-	kfree(idd);
-}
-
-static const struct pci_device_id ioc4_id_table[] = {
-	{PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC4, PCI_ANY_ID,
-	 PCI_ANY_ID, 0x0b4000, 0xFFFFFF},
-	{0}
-};
-
-static struct pci_driver ioc4_driver = {
-	.name = "IOC4",
-	.id_table = ioc4_id_table,
-	.probe = ioc4_probe,
-	.remove = ioc4_remove,
-};
-
-MODULE_DEVICE_TABLE(pci, ioc4_id_table);
-
-/*********************
- * Module management *
- *********************/
-
-/* Module load */
-static int __init
-ioc4_init(void)
-{
-	return pci_register_driver(&ioc4_driver);
-}
-
-/* Module unload */
-static void __exit
-ioc4_exit(void)
-{
-	/* Ensure ioc4_load_modules() has completed before exiting */
-	flush_work(&ioc4_load_modules_work);
-	pci_unregister_driver(&ioc4_driver);
-}
-
-module_init(ioc4_init);
-module_exit(ioc4_exit);
-
-MODULE_AUTHOR("Brent Casavant - Silicon Graphics, Inc. <bcasavan@sgi.com>");
-MODULE_DESCRIPTION("PCI driver master module for SGI IOC4 Base-IO Card");
-MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(ioc4_register_submodule);
-EXPORT_SYMBOL(ioc4_unregister_submodule);
diff --git a/drivers/misc/sgi-xp/Makefile b/drivers/misc/sgi-xp/Makefile
index bbb622c19c06..34c55a4045af 100644
--- a/drivers/misc/sgi-xp/Makefile
+++ b/drivers/misc/sgi-xp/Makefile
@@ -4,17 +4,10 @@
 #
 
 obj-$(CONFIG_SGI_XP)		+= xp.o
-xp-y				:= xp_main.o
-xp-$(CONFIG_IA64_SGI_SN2)	+= xp_sn2.o xp_nofault.o
-xp-$(CONFIG_IA64_GENERIC)	+= xp_sn2.o xp_nofault.o
-xp-$(CONFIG_IA64_SGI_UV)	+= xp_uv.o
-xp-$(CONFIG_X86_64)		+= xp_uv.o
+xp-y				:= xp_main.o xp_uv.o
 
 obj-$(CONFIG_SGI_XP)		+= xpc.o
-xpc-y				:= xpc_main.o xpc_channel.o xpc_partition.o
-xpc-$(CONFIG_IA64_SGI_SN2)	+= xpc_sn2.o
-xpc-$(CONFIG_IA64_GENERIC)	+= xpc_sn2.o
-xpc-$(CONFIG_IA64_SGI_UV) 	+= xpc_uv.o
-xpc-$(CONFIG_X86_64)		+= xpc_uv.o
+xpc-y				:= xpc_main.o xpc_channel.o xpc_partition.o \
+				   xpc_uv.o
 
 obj-$(CONFIG_SGI_XP)		+= xpnet.o
diff --git a/drivers/misc/sgi-xp/xp.h b/drivers/misc/sgi-xp/xp.h
index b8069eec18cb..06469b12aced 100644
--- a/drivers/misc/sgi-xp/xp.h
+++ b/drivers/misc/sgi-xp/xp.h
@@ -24,23 +24,6 @@
 #define is_uv()		0
 #endif
 
-#if defined CONFIG_IA64
-#include <asm/sn/arch.h>	/* defines is_shub1() and is_shub2() */
-#define is_shub()	ia64_platform_is("sn2")
-#endif
-
-#ifndef is_shub1
-#define is_shub1()	0
-#endif
-
-#ifndef is_shub2
-#define is_shub2()	0
-#endif
-
-#ifndef is_shub
-#define is_shub()	0
-#endif
-
 #ifdef USE_DBUG_ON
 #define DBUG_ON(condition)	BUG_ON(condition)
 #else
@@ -360,9 +343,7 @@ extern int xp_nofault_PIOR(void *);
 extern int xp_error_PIOR(void);
 
 extern struct device *xp;
-extern enum xp_retval xp_init_sn2(void);
 extern enum xp_retval xp_init_uv(void);
-extern void xp_exit_sn2(void);
 extern void xp_exit_uv(void);
 
 #endif /* _DRIVERS_MISC_SGIXP_XP_H */
diff --git a/drivers/misc/sgi-xp/xp_main.c b/drivers/misc/sgi-xp/xp_main.c
index 6d7f557fd1c1..5fd94d836070 100644
--- a/drivers/misc/sgi-xp/xp_main.c
+++ b/drivers/misc/sgi-xp/xp_main.c
@@ -233,9 +233,7 @@ xp_init(void)
 	for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++)
 		mutex_init(&xpc_registrations[ch_number].mutex);
 
-	if (is_shub())
-		ret = xp_init_sn2();
-	else if (is_uv())
+	if (is_uv())
 		ret = xp_init_uv();
 	else
 		ret = 0;
@@ -251,9 +249,7 @@ module_init(xp_init);
 void __exit
 xp_exit(void)
 {
-	if (is_shub())
-		xp_exit_sn2();
-	else if (is_uv())
+	if (is_uv())
 		xp_exit_uv();
 }
 
diff --git a/drivers/misc/sgi-xp/xp_nofault.S b/drivers/misc/sgi-xp/xp_nofault.S
deleted file mode 100644
index e38d43319429..000000000000
--- a/drivers/misc/sgi-xp/xp_nofault.S
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2004-2008 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-/*
- * The xp_nofault_PIOR function takes a pointer to a remote PIO register
- * and attempts to load and consume a value from it.  This function
- * will be registered as a nofault code block.  In the event that the
- * PIO read fails, the MCA handler will force the error to look
- * corrected and vector to the xp_error_PIOR which will return an error.
- *
- * The definition of "consumption" and the time it takes for an MCA
- * to surface is processor implementation specific.  This code
- * is sufficient on Itanium through the Montvale processor family.
- * It may need to be adjusted for future processor implementations.
- *
- *	extern int xp_nofault_PIOR(void *remote_register);
- */
-
-	.global xp_nofault_PIOR
-xp_nofault_PIOR:
-	mov	r8=r0			// Stage a success return value
-	ld8.acq	r9=[r32];;		// PIO Read the specified register
-	adds	r9=1,r9;;		// Add to force consumption
-	srlz.i;;			// Allow time for MCA to surface
-	br.ret.sptk.many b0;;		// Return success
-
-	.global xp_error_PIOR
-xp_error_PIOR:
-	mov	r8=1			// Return value of 1
-	br.ret.sptk.many b0;;		// Return failure
diff --git a/drivers/misc/sgi-xp/xp_sn2.c b/drivers/misc/sgi-xp/xp_sn2.c
deleted file mode 100644
index d8e463f87241..000000000000
--- a/drivers/misc/sgi-xp/xp_sn2.c
+++ /dev/null
@@ -1,190 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-/*
- * Cross Partition (XP) sn2-based functions.
- *
- *      Architecture specific implementation of common functions.
- */
-
-#include <linux/module.h>
-#include <linux/device.h>
-#include <asm/sn/bte.h>
-#include <asm/sn/sn_sal.h>
-#include "xp.h"
-
-/*
- * The export of xp_nofault_PIOR needs to happen here since it is defined
- * in drivers/misc/sgi-xp/xp_nofault.S. The target of the nofault read is
- * defined here.
- */
-EXPORT_SYMBOL_GPL(xp_nofault_PIOR);
-
-u64 xp_nofault_PIOR_target;
-EXPORT_SYMBOL_GPL(xp_nofault_PIOR_target);
-
-/*
- * Register a nofault code region which performs a cross-partition PIO read.
- * If the PIO read times out, the MCA handler will consume the error and
- * return to a kernel-provided instruction to indicate an error. This PIO read
- * exists because it is guaranteed to timeout if the destination is down
- * (amo operations do not timeout on at least some CPUs on Shubs <= v1.2,
- * which unfortunately we have to work around).
- */
-static enum xp_retval
-xp_register_nofault_code_sn2(void)
-{
-	int ret;
-	u64 func_addr;
-	u64 err_func_addr;
-
-	func_addr = *(u64 *)xp_nofault_PIOR;
-	err_func_addr = *(u64 *)xp_error_PIOR;
-	ret = sn_register_nofault_code(func_addr, err_func_addr, err_func_addr,
-				       1, 1);
-	if (ret != 0) {
-		dev_err(xp, "can't register nofault code, error=%d\n", ret);
-		return xpSalError;
-	}
-	/*
-	 * Setup the nofault PIO read target. (There is no special reason why
-	 * SH_IPI_ACCESS was selected.)
-	 */
-	if (is_shub1())
-		xp_nofault_PIOR_target = SH1_IPI_ACCESS;
-	else if (is_shub2())
-		xp_nofault_PIOR_target = SH2_IPI_ACCESS0;
-
-	return xpSuccess;
-}
-
-static void
-xp_unregister_nofault_code_sn2(void)
-{
-	u64 func_addr = *(u64 *)xp_nofault_PIOR;
-	u64 err_func_addr = *(u64 *)xp_error_PIOR;
-
-	/* unregister the PIO read nofault code region */
-	(void)sn_register_nofault_code(func_addr, err_func_addr,
-				       err_func_addr, 1, 0);
-}
-
-/*
- * Convert a virtual memory address to a physical memory address.
- */
-static unsigned long
-xp_pa_sn2(void *addr)
-{
-	return __pa(addr);
-}
-
-/*
- * Convert a global physical to a socket physical address.
- */
-static unsigned long
-xp_socket_pa_sn2(unsigned long gpa)
-{
-	return gpa;
-}
-
-/*
- * Wrapper for bte_copy().
- *
- *	dst_pa - physical address of the destination of the transfer.
- *	src_pa - physical address of the source of the transfer.
- *	len - number of bytes to transfer from source to destination.
- *
- * Note: xp_remote_memcpy_sn2() should never be called while holding a spinlock.
- */
-static enum xp_retval
-xp_remote_memcpy_sn2(unsigned long dst_pa, const unsigned long src_pa,
-		     size_t len)
-{
-	bte_result_t ret;
-
-	ret = bte_copy(src_pa, dst_pa, len, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
-	if (ret == BTE_SUCCESS)
-		return xpSuccess;
-
-	if (is_shub2()) {
-		dev_err(xp, "bte_copy() on shub2 failed, error=0x%x dst_pa="
-			"0x%016lx src_pa=0x%016lx len=%ld\\n", ret, dst_pa,
-			src_pa, len);
-	} else {
-		dev_err(xp, "bte_copy() failed, error=%d dst_pa=0x%016lx "
-			"src_pa=0x%016lx len=%ld\\n", ret, dst_pa, src_pa, len);
-	}
-
-	return xpBteCopyError;
-}
-
-static int
-xp_cpu_to_nasid_sn2(int cpuid)
-{
-	return cpuid_to_nasid(cpuid);
-}
-
-static enum xp_retval
-xp_expand_memprotect_sn2(unsigned long phys_addr, unsigned long size)
-{
-	u64 nasid_array = 0;
-	int ret;
-
-	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1,
-				   &nasid_array);
-	if (ret != 0) {
-		dev_err(xp, "sn_change_memprotect(,, "
-			"SN_MEMPROT_ACCESS_CLASS_1,) failed ret=%d\n", ret);
-		return xpSalError;
-	}
-	return xpSuccess;
-}
-
-static enum xp_retval
-xp_restrict_memprotect_sn2(unsigned long phys_addr, unsigned long size)
-{
-	u64 nasid_array = 0;
-	int ret;
-
-	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0,
-				   &nasid_array);
-	if (ret != 0) {
-		dev_err(xp, "sn_change_memprotect(,, "
-			"SN_MEMPROT_ACCESS_CLASS_0,) failed ret=%d\n", ret);
-		return xpSalError;
-	}
-	return xpSuccess;
-}
-
-enum xp_retval
-xp_init_sn2(void)
-{
-	BUG_ON(!is_shub());
-
-	xp_max_npartitions = XP_MAX_NPARTITIONS_SN2;
-	xp_partition_id = sn_partition_id;
-	xp_region_size = sn_region_size;
-
-	xp_pa = xp_pa_sn2;
-	xp_socket_pa = xp_socket_pa_sn2;
-	xp_remote_memcpy = xp_remote_memcpy_sn2;
-	xp_cpu_to_nasid = xp_cpu_to_nasid_sn2;
-	xp_expand_memprotect = xp_expand_memprotect_sn2;
-	xp_restrict_memprotect = xp_restrict_memprotect_sn2;
-
-	return xp_register_nofault_code_sn2();
-}
-
-void
-xp_exit_sn2(void)
-{
-	BUG_ON(!is_shub());
-
-	xp_unregister_nofault_code_sn2();
-}
-
diff --git a/drivers/misc/sgi-xp/xp_uv.c b/drivers/misc/sgi-xp/xp_uv.c
index a0d093274dc0..f15a9f2ac1dd 100644
--- a/drivers/misc/sgi-xp/xp_uv.c
+++ b/drivers/misc/sgi-xp/xp_uv.c
@@ -17,7 +17,7 @@
 #include <asm/uv/uv_hub.h>
 #if defined CONFIG_X86_64
 #include <asm/uv/bios.h>
-#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#elif defined CONFIG_IA64_SGI_UV
 #include <asm/sn/sn_sal.h>
 #endif
 #include "../sgi-gru/grukservices.h"
@@ -99,7 +99,7 @@ xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
 		return xpBiosError;
 	}
 
-#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#elif defined CONFIG_IA64_SGI_UV
 	u64 nasid_array;
 
 	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1,
@@ -129,7 +129,7 @@ xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
 		return xpBiosError;
 	}
 
-#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#elif defined CONFIG_IA64_SGI_UV
 	u64 nasid_array;
 
 	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0,
@@ -151,9 +151,10 @@ xp_init_uv(void)
 	BUG_ON(!is_uv());
 
 	xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
+#ifdef CONFIG_X86
 	xp_partition_id = sn_partition_id;
 	xp_region_size = sn_region_size;
-
+#endif
 	xp_pa = xp_pa_uv;
 	xp_socket_pa = xp_socket_pa_uv;
 	xp_remote_memcpy = xp_remote_memcpy_uv;
diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h
index b94d5f767703..71db60edff65 100644
--- a/drivers/misc/sgi-xp/xpc.h
+++ b/drivers/misc/sgi-xp/xpc.h
@@ -71,14 +71,10 @@
  *     'SAL_nasids_size'. (Local partition's mask pointers are xpc_part_nasids
  *     and xpc_mach_nasids.)
  *
- *   vars	(ia64-sn2 only)
- *   vars part	(ia64-sn2 only)
- *
  *     Immediately following the mach_nasids mask are the XPC variables
  *     required by other partitions. First are those that are generic to all
  *     partitions (vars), followed on the next available cacheline by those
  *     which are partition specific (vars part). These are setup by XPC.
- *     (Local partition's vars pointers are xpc_vars and xpc_vars_part.)
  *
  * Note: Until 'ts_jiffies' is set non-zero, the partition XPC code has not been
  *       initialized.
@@ -93,9 +89,6 @@ struct xpc_rsvd_page {
 	unsigned long ts_jiffies; /* timestamp when rsvd pg was setup by XPC */
 	union {
 		struct {
-			unsigned long vars_pa;	/* phys addr */
-		} sn2;
-		struct {
 			unsigned long heartbeat_gpa; /* phys addr */
 			unsigned long activate_gru_mq_desc_gpa; /* phys addr */
 		} uv;
@@ -106,84 +99,14 @@ struct xpc_rsvd_page {
 
 #define XPC_RP_VERSION _XPC_VERSION(3, 0) /* version 3.0 of the reserved page */
 
-/*
- * Define the structures by which XPC variables can be exported to other
- * partitions. (There are two: struct xpc_vars and struct xpc_vars_part)
- */
-
-/*
- * The following structure describes the partition generic variables
- * needed by other partitions in order to properly initialize.
- *
- * struct xpc_vars version number also applies to struct xpc_vars_part.
- * Changes to either structure and/or related functionality should be
- * reflected by incrementing either the major or minor version numbers
- * of struct xpc_vars.
- */
-struct xpc_vars_sn2 {
-	u8 version;
-	u64 heartbeat;
-	DECLARE_BITMAP(heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2);
-	u64 heartbeat_offline;	/* if 0, heartbeat should be changing */
-	int activate_IRQ_nasid;
-	int activate_IRQ_phys_cpuid;
-	unsigned long vars_part_pa;
-	unsigned long amos_page_pa;/* paddr of page of amos from MSPEC driver */
-	struct amo *amos_page;	/* vaddr of page of amos from MSPEC driver */
-};
-
-#define XPC_V_VERSION _XPC_VERSION(3, 1)    /* version 3.1 of the cross vars */
-
-/*
- * The following structure describes the per partition specific variables.
- *
- * An array of these structures, one per partition, will be defined. As a
- * partition becomes active XPC will copy the array entry corresponding to
- * itself from that partition. It is desirable that the size of this structure
- * evenly divides into a 128-byte cacheline, such that none of the entries in
- * this array crosses a 128-byte cacheline boundary. As it is now, each entry
- * occupies 64-bytes.
- */
-struct xpc_vars_part_sn2 {
-	u64 magic;
-
-	unsigned long openclose_args_pa; /* phys addr of open and close args */
-	unsigned long GPs_pa;	/* physical address of Get/Put values */
-
-	unsigned long chctl_amo_pa; /* physical address of chctl flags' amo */
-
-	int notify_IRQ_nasid;	/* nasid of where to send notify IRQs */
-	int notify_IRQ_phys_cpuid;	/* CPUID of where to send notify IRQs */
-
-	u8 nchannels;		/* #of defined channels supported */
-
-	u8 reserved[23];	/* pad to a full 64 bytes */
-};
-
-/*
- * The vars_part MAGIC numbers play a part in the first contact protocol.
- *
- * MAGIC1 indicates that the per partition specific variables for a remote
- * partition have been initialized by this partition.
- *
- * MAGIC2 indicates that this partition has pulled the remote partititions
- * per partition variables that pertain to this partition.
- */
-#define XPC_VP_MAGIC1_SN2 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */
-#define XPC_VP_MAGIC2_SN2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */
-
 /* the reserved page sizes and offsets */
 
 #define XPC_RP_HEADER_SIZE	L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page))
-#define XPC_RP_VARS_SIZE	L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2))
 
 #define XPC_RP_PART_NASIDS(_rp) ((unsigned long *)((u8 *)(_rp) + \
 				 XPC_RP_HEADER_SIZE))
 #define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + \
 				 xpc_nasid_mask_nlongs)
-#define XPC_RP_VARS(_rp)	((struct xpc_vars_sn2 *) \
-				 (XPC_RP_MACH_NASIDS(_rp) + \
-				  xpc_nasid_mask_nlongs))
 
 
 /*
@@ -298,17 +221,6 @@ struct xpc_activate_mq_msg_chctl_opencomplete_uv {
 #define XPC_UNPACK_ARG2(_args)	((((u64)_args) >> 32) & 0xffffffff)
 
 /*
- * Define a Get/Put value pair (pointers) used with a message queue.
- */
-struct xpc_gp_sn2 {
-	s64 get;		/* Get value */
-	s64 put;		/* Put value */
-};
-
-#define XPC_GP_SIZE \
-		L1_CACHE_ALIGN(sizeof(struct xpc_gp_sn2) * XPC_MAX_NCHANNELS)
-
-/*
  * Define a structure that contains arguments associated with opening and
  * closing a channel.
  */
@@ -341,30 +253,6 @@ struct xpc_fifo_head_uv {
 };
 
 /*
- * Define a sn2 styled message.
- *
- * A user-defined message resides in the payload area. The max size of the
- * payload is defined by the user via xpc_connect().
- *
- * The size of a message entry (within a message queue) must be a 128-byte
- * cacheline sized multiple in order to facilitate the BTE transfer of messages
- * from one message queue to another.
- */
-struct xpc_msg_sn2 {
-	u8 flags;		/* FOR XPC INTERNAL USE ONLY */
-	u8 reserved[7];		/* FOR XPC INTERNAL USE ONLY */
-	s64 number;		/* FOR XPC INTERNAL USE ONLY */
-
-	u64 payload;		/* user defined portion of message */
-};
-
-/* struct xpc_msg_sn2 flags */
-
-#define	XPC_M_SN2_DONE		0x01	/* msg has been received/consumed */
-#define	XPC_M_SN2_READY		0x02	/* msg is ready to be sent */
-#define	XPC_M_SN2_INTERRUPT	0x04	/* send interrupt when msg consumed */
-
-/*
  * The format of a uv XPC notify_mq GRU message is as follows:
  *
  * A user-defined message resides in the payload area. The max size of the
@@ -390,20 +278,6 @@ struct xpc_notify_mq_msg_uv {
 	unsigned long payload;
 };
 
-/*
- * Define sn2's notify entry.
- *
- * This is used to notify a message's sender that their message was received
- * and consumed by the intended recipient.
- */
-struct xpc_notify_sn2 {
-	u8 type;		/* type of notification */
-
-	/* the following two fields are only used if type == XPC_N_CALL */
-	xpc_notify_func func;	/* user's notify function */
-	void *key;		/* pointer to user's key */
-};
-
 /* struct xpc_notify_sn2 type of notification */
 
 #define	XPC_N_CALL	0x01	/* notify function provided by user */
@@ -431,102 +305,6 @@ struct xpc_send_msg_slot_uv {
  * of these structures for each potential channel connection to that partition.
  */
 
-/*
- * The following is sn2 only.
- *
- * Each channel structure manages two message queues (circular buffers).
- * They are allocated at the time a channel connection is made. One of
- * these message queues (local_msgqueue) holds the locally created messages
- * that are destined for the remote partition. The other of these message
- * queues (remote_msgqueue) is a locally cached copy of the remote partition's
- * own local_msgqueue.
- *
- * The following is a description of the Get/Put pointers used to manage these
- * two message queues. Consider the local_msgqueue to be on one partition
- * and the remote_msgqueue to be its cached copy on another partition. A
- * description of what each of the lettered areas contains is included.
- *
- *
- *                     local_msgqueue      remote_msgqueue
- *
- *                        |/////////|      |/////////|
- *    w_remote_GP.get --> +---------+      |/////////|
- *                        |    F    |      |/////////|
- *     remote_GP.get  --> +---------+      +---------+ <-- local_GP->get
- *                        |         |      |         |
- *                        |         |      |    E    |
- *                        |         |      |         |
- *                        |         |      +---------+ <-- w_local_GP.get
- *                        |    B    |      |/////////|
- *                        |         |      |////D////|
- *                        |         |      |/////////|
- *                        |         |      +---------+ <-- w_remote_GP.put
- *                        |         |      |////C////|
- *      local_GP->put --> +---------+      +---------+ <-- remote_GP.put
- *                        |         |      |/////////|
- *                        |    A    |      |/////////|
- *                        |         |      |/////////|
- *     w_local_GP.put --> +---------+      |/////////|
- *                        |/////////|      |/////////|
- *
- *
- *	    ( remote_GP.[get|put] are cached copies of the remote
- *	      partition's local_GP->[get|put], and thus their values can
- *	      lag behind their counterparts on the remote partition. )
- *
- *
- *  A - Messages that have been allocated, but have not yet been sent to the
- *	remote partition.
- *
- *  B - Messages that have been sent, but have not yet been acknowledged by the
- *      remote partition as having been received.
- *
- *  C - Area that needs to be prepared for the copying of sent messages, by
- *	the clearing of the message flags of any previously received messages.
- *
- *  D - Area into which sent messages are to be copied from the remote
- *	partition's local_msgqueue and then delivered to their intended
- *	recipients. [ To allow for a multi-message copy, another pointer
- *	(next_msg_to_pull) has been added to keep track of the next message
- *	number needing to be copied (pulled). It chases after w_remote_GP.put.
- *	Any messages lying between w_local_GP.get and next_msg_to_pull have
- *	been copied and are ready to be delivered. ]
- *
- *  E - Messages that have been copied and delivered, but have not yet been
- *	acknowledged by the recipient as having been received.
- *
- *  F - Messages that have been acknowledged, but XPC has not yet notified the
- *	sender that the message was received by its intended recipient.
- *	This is also an area that needs to be prepared for the allocating of
- *	new messages, by the clearing of the message flags of the acknowledged
- *	messages.
- */
-
-struct xpc_channel_sn2 {
-	struct xpc_openclose_args *local_openclose_args; /* args passed on */
-					     /* opening or closing of channel */
-
-	void *local_msgqueue_base;	/* base address of kmalloc'd space */
-	struct xpc_msg_sn2 *local_msgqueue;	/* local message queue */
-	void *remote_msgqueue_base;	/* base address of kmalloc'd space */
-	struct xpc_msg_sn2 *remote_msgqueue; /* cached copy of remote */
-					   /* partition's local message queue */
-	unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */
-					  /* local message queue */
-
-	struct xpc_notify_sn2 *notify_queue;/* notify queue for messages sent */
-
-	/* various flavors of local and remote Get/Put values */
-
-	struct xpc_gp_sn2 *local_GP;	/* local Get/Put values */
-	struct xpc_gp_sn2 remote_GP;	/* remote Get/Put values */
-	struct xpc_gp_sn2 w_local_GP;	/* working local Get/Put values */
-	struct xpc_gp_sn2 w_remote_GP;	/* working remote Get/Put values */
-	s64 next_msg_to_pull;	/* Put value of next msg to pull */
-
-	struct mutex msg_to_pull_mutex;	/* next msg to pull serialization */
-};
-
 struct xpc_channel_uv {
 	void *cached_notify_gru_mq_desc; /* remote partition's notify mq's */
 					 /* gru mq descriptor */
@@ -579,7 +357,6 @@ struct xpc_channel {
 	wait_queue_head_t idle_wq;	/* idle kthread wait queue */
 
 	union {
-		struct xpc_channel_sn2 sn2;
 		struct xpc_channel_uv uv;
 	} sn;
 
@@ -666,43 +443,6 @@ xpc_any_msg_chctl_flags_set(union xpc_channel_ctl_flags *chctl)
 	return 0;
 }
 
-/*
- * Manage channels on a partition basis. There is one of these structures
- * for each partition (a partition will never utilize the structure that
- * represents itself).
- */
-
-struct xpc_partition_sn2 {
-	unsigned long remote_amos_page_pa; /* paddr of partition's amos page */
-	int activate_IRQ_nasid;	/* active partition's act/deact nasid */
-	int activate_IRQ_phys_cpuid;	/* active part's act/deact phys cpuid */
-
-	unsigned long remote_vars_pa;	/* phys addr of partition's vars */
-	unsigned long remote_vars_part_pa; /* paddr of partition's vars part */
-	u8 remote_vars_version;	/* version# of partition's vars */
-
-	void *local_GPs_base;	/* base address of kmalloc'd space */
-	struct xpc_gp_sn2 *local_GPs;	/* local Get/Put values */
-	void *remote_GPs_base;	/* base address of kmalloc'd space */
-	struct xpc_gp_sn2 *remote_GPs;	/* copy of remote partition's local */
-					/* Get/Put values */
-	unsigned long remote_GPs_pa; /* phys addr of remote partition's local */
-				     /* Get/Put values */
-
-	void *local_openclose_args_base;   /* base address of kmalloc'd space */
-	struct xpc_openclose_args *local_openclose_args;      /* local's args */
-	unsigned long remote_openclose_args_pa;	/* phys addr of remote's args */
-
-	int notify_IRQ_nasid;	/* nasid of where to send notify IRQs */
-	int notify_IRQ_phys_cpuid;	/* CPUID of where to send notify IRQs */
-	char notify_IRQ_owner[8];	/* notify IRQ's owner's name */
-
-	struct amo *remote_chctl_amo_va; /* addr of remote chctl flags' amo */
-	struct amo *local_chctl_amo_va;	/* address of chctl flags' amo */
-
-	struct timer_list dropped_notify_IRQ_timer;	/* dropped IRQ timer */
-};
-
 struct xpc_partition_uv {
 	unsigned long heartbeat_gpa; /* phys addr of partition's heartbeat */
 	struct xpc_heartbeat_uv cached_heartbeat; /* cached copy of */
@@ -774,7 +514,6 @@ struct xpc_partition {
 	wait_queue_head_t channel_mgr_wq;	/* channel mgr's wait queue */
 
 	union {
-		struct xpc_partition_sn2 sn2;
 		struct xpc_partition_uv uv;
 	} sn;
 
@@ -854,14 +593,6 @@ struct xpc_arch_operations {
 #define XPC_P_SS_WTEARDOWN	0x02	/* waiting to teardown infrastructure */
 #define XPC_P_SS_TORNDOWN	0x03	/* infrastructure is torndown */
 
-/*
- * struct xpc_partition_sn2's dropped notify IRQ timer is set to wait the
- * following interval #of seconds before checking for dropped notify IRQs.
- * These can occur whenever an IRQ's associated amo write doesn't complete
- * until after the IRQ was received.
- */
-#define XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL	(0.25 * HZ)
-
 /* number of seconds to wait for other partitions to disengage */
 #define XPC_DISENGAGE_DEFAULT_TIMELIMIT		90
 
@@ -888,10 +619,6 @@ extern void xpc_activate_kthreads(struct xpc_channel *, int);
 extern void xpc_create_kthreads(struct xpc_channel *, int, int);
 extern void xpc_disconnect_wait(int);
 
-/* found in xpc_sn2.c */
-extern int xpc_init_sn2(void);
-extern void xpc_exit_sn2(void);
-
 /* found in xpc_uv.c */
 extern int xpc_init_uv(void);
 extern void xpc_exit_uv(void);
diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c
index 83fc748a91a7..79a963105983 100644
--- a/drivers/misc/sgi-xp/xpc_main.c
+++ b/drivers/misc/sgi-xp/xpc_main.c
@@ -279,13 +279,6 @@ xpc_hb_checker(void *ignore)
 
 			dev_dbg(xpc_part, "checking remote heartbeats\n");
 			xpc_check_remote_hb();
-
-			/*
-			 * On sn2 we need to periodically recheck to ensure no
-			 * IRQ/amo pairs have been missed.
-			 */
-			if (is_shub())
-				force_IRQ = 1;
 		}
 
 		/* check for outstanding IRQs */
@@ -1050,9 +1043,7 @@ xpc_do_exit(enum xp_retval reason)
 
 	xpc_teardown_partitions();
 
-	if (is_shub())
-		xpc_exit_sn2();
-	else if (is_uv())
+	if (is_uv())
 		xpc_exit_uv();
 }
 
@@ -1235,21 +1226,7 @@ xpc_init(void)
 	dev_set_name(xpc_part, "part");
 	dev_set_name(xpc_chan, "chan");
 
-	if (is_shub()) {
-		/*
-		 * The ia64-sn2 architecture supports at most 64 partitions.
-		 * And the inability to unregister remote amos restricts us
-		 * further to only support exactly 64 partitions on this
-		 * architecture, no less.
-		 */
-		if (xp_max_npartitions != 64) {
-			dev_err(xpc_part, "max #of partitions not set to 64\n");
-			ret = -EINVAL;
-		} else {
-			ret = xpc_init_sn2();
-		}
-
-	} else if (is_uv()) {
+	if (is_uv()) {
 		ret = xpc_init_uv();
 
 	} else {
@@ -1335,9 +1312,7 @@ out_2:
 
 	xpc_teardown_partitions();
 out_1:
-	if (is_shub())
-		xpc_exit_sn2();
-	else if (is_uv())
+	if (is_uv())
 		xpc_exit_uv();
 	return ret;
 }
diff --git a/drivers/misc/sgi-xp/xpc_partition.c b/drivers/misc/sgi-xp/xpc_partition.c
index 782ce95d3f17..21a04bc97d40 100644
--- a/drivers/misc/sgi-xp/xpc_partition.c
+++ b/drivers/misc/sgi-xp/xpc_partition.c
@@ -93,10 +93,6 @@ xpc_get_rsvd_page_pa(int nasid)
 		if (ret != xpNeedMoreInfo)
 			break;
 
-		/* !!! L1_CACHE_ALIGN() is only a sn2-bte_copy requirement */
-		if (is_shub())
-			len = L1_CACHE_ALIGN(len);
-
 		if (len > buf_len) {
 			kfree(buf_base);
 			buf_len = L1_CACHE_ALIGN(len);
@@ -452,7 +448,6 @@ xpc_discovery(void)
 		case 32:
 			max_regions *= 2;
 			region_size = 16;
-			DBUG_ON(!is_shub2());
 		}
 	}
 
diff --git a/drivers/misc/sgi-xp/xpc_sn2.c b/drivers/misc/sgi-xp/xpc_sn2.c
deleted file mode 100644
index 0ae69b9390ce..000000000000
--- a/drivers/misc/sgi-xp/xpc_sn2.c
+++ /dev/null
@@ -1,2459 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2008-2009 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-/*
- * Cross Partition Communication (XPC) sn2-based functions.
- *
- *     Architecture specific implementation of common functions.
- *
- */
-
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <asm/uncached.h>
-#include <asm/sn/mspec.h>
-#include <asm/sn/sn_sal.h>
-#include "xpc.h"
-
-/*
- * Define the number of u64s required to represent all the C-brick nasids
- * as a bitmap.  The cross-partition kernel modules deal only with
- * C-brick nasids, thus the need for bitmaps which don't account for
- * odd-numbered (non C-brick) nasids.
- */
-#define XPC_MAX_PHYSNODES_SN2	(MAX_NUMALINK_NODES / 2)
-#define XP_NASID_MASK_BYTES_SN2	((XPC_MAX_PHYSNODES_SN2 + 7) / 8)
-#define XP_NASID_MASK_WORDS_SN2	((XPC_MAX_PHYSNODES_SN2 + 63) / 64)
-
-/*
- * Memory for XPC's amo variables is allocated by the MSPEC driver. These
- * pages are located in the lowest granule. The lowest granule uses 4k pages
- * for cached references and an alternate TLB handler to never provide a
- * cacheable mapping for the entire region. This will prevent speculative
- * reading of cached copies of our lines from being issued which will cause
- * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
- * amo variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of
- * NOTIFY IRQs, 128 amo variables (based on XP_NASID_MASK_WORDS_SN2) to identify
- * the senders of ACTIVATE IRQs, 1 amo variable to identify which remote
- * partitions (i.e., XPCs) consider themselves currently engaged with the
- * local XPC and 1 amo variable to request partition deactivation.
- */
-#define XPC_NOTIFY_IRQ_AMOS_SN2		0
-#define XPC_ACTIVATE_IRQ_AMOS_SN2	(XPC_NOTIFY_IRQ_AMOS_SN2 + \
-					 XP_MAX_NPARTITIONS_SN2)
-#define XPC_ENGAGED_PARTITIONS_AMO_SN2	(XPC_ACTIVATE_IRQ_AMOS_SN2 + \
-					 XP_NASID_MASK_WORDS_SN2)
-#define XPC_DEACTIVATE_REQUEST_AMO_SN2	(XPC_ENGAGED_PARTITIONS_AMO_SN2 + 1)
-
-/*
- * Buffer used to store a local copy of portions of a remote partition's
- * reserved page (either its header and part_nasids mask, or its vars).
- */
-static void *xpc_remote_copy_buffer_base_sn2;
-static char *xpc_remote_copy_buffer_sn2;
-
-static struct xpc_vars_sn2 *xpc_vars_sn2;
-static struct xpc_vars_part_sn2 *xpc_vars_part_sn2;
-
-static int
-xpc_setup_partitions_sn2(void)
-{
-	/* nothing needs to be done */
-	return 0;
-}
-
-static void
-xpc_teardown_partitions_sn2(void)
-{
-	/* nothing needs to be done */
-}
-
-/* SH_IPI_ACCESS shub register value on startup */
-static u64 xpc_sh1_IPI_access_sn2;
-static u64 xpc_sh2_IPI_access0_sn2;
-static u64 xpc_sh2_IPI_access1_sn2;
-static u64 xpc_sh2_IPI_access2_sn2;
-static u64 xpc_sh2_IPI_access3_sn2;
-
-/*
- * Change protections to allow IPI operations.
- */
-static void
-xpc_allow_IPI_ops_sn2(void)
-{
-	int node;
-	int nasid;
-
-	/* !!! The following should get moved into SAL. */
-	if (is_shub2()) {
-		xpc_sh2_IPI_access0_sn2 =
-		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
-		xpc_sh2_IPI_access1_sn2 =
-		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
-		xpc_sh2_IPI_access2_sn2 =
-		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
-		xpc_sh2_IPI_access3_sn2 =
-		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
-
-		for_each_online_node(node) {
-			nasid = cnodeid_to_nasid(node);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
-			      -1UL);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
-			      -1UL);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
-			      -1UL);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
-			      -1UL);
-		}
-	} else {
-		xpc_sh1_IPI_access_sn2 =
-		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
-
-		for_each_online_node(node) {
-			nasid = cnodeid_to_nasid(node);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
-			      -1UL);
-		}
-	}
-}
-
-/*
- * Restrict protections to disallow IPI operations.
- */
-static void
-xpc_disallow_IPI_ops_sn2(void)
-{
-	int node;
-	int nasid;
-
-	/* !!! The following should get moved into SAL. */
-	if (is_shub2()) {
-		for_each_online_node(node) {
-			nasid = cnodeid_to_nasid(node);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
-			      xpc_sh2_IPI_access0_sn2);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
-			      xpc_sh2_IPI_access1_sn2);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
-			      xpc_sh2_IPI_access2_sn2);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
-			      xpc_sh2_IPI_access3_sn2);
-		}
-	} else {
-		for_each_online_node(node) {
-			nasid = cnodeid_to_nasid(node);
-			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
-			      xpc_sh1_IPI_access_sn2);
-		}
-	}
-}
-
-/*
- * The following set of functions are used for the sending and receiving of
- * IRQs (also known as IPIs). There are two flavors of IRQs, one that is
- * associated with partition activity (SGI_XPC_ACTIVATE) and the other that
- * is associated with channel activity (SGI_XPC_NOTIFY).
- */
-
-static u64
-xpc_receive_IRQ_amo_sn2(struct amo *amo)
-{
-	return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_CLEAR);
-}
-
-static enum xp_retval
-xpc_send_IRQ_sn2(struct amo *amo, u64 flag, int nasid, int phys_cpuid,
-		 int vector)
-{
-	int ret = 0;
-	unsigned long irq_flags;
-
-	local_irq_save(irq_flags);
-
-	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR, flag);
-	sn_send_IPI_phys(nasid, phys_cpuid, vector, 0);
-
-	/*
-	 * We must always use the nofault function regardless of whether we
-	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
-	 * didn't, we'd never know that the other partition is down and would
-	 * keep sending IRQs and amos to it until the heartbeat times out.
-	 */
-	ret = xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->variable),
-						     xp_nofault_PIOR_target));
-
-	local_irq_restore(irq_flags);
-
-	return (ret == 0) ? xpSuccess : xpPioReadError;
-}
-
-static struct amo *
-xpc_init_IRQ_amo_sn2(int index)
-{
-	struct amo *amo = xpc_vars_sn2->amos_page + index;
-
-	(void)xpc_receive_IRQ_amo_sn2(amo);	/* clear amo variable */
-	return amo;
-}
-
-/*
- * Functions associated with SGI_XPC_ACTIVATE IRQ.
- */
-
-/*
- * Notify the heartbeat check thread that an activate IRQ has been received.
- */
-static irqreturn_t
-xpc_handle_activate_IRQ_sn2(int irq, void *dev_id)
-{
-	unsigned long irq_flags;
-
-	spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-	xpc_activate_IRQ_rcvd++;
-	spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
-	wake_up_interruptible(&xpc_activate_IRQ_wq);
-	return IRQ_HANDLED;
-}
-
-/*
- * Flag the appropriate amo variable and send an IRQ to the specified node.
- */
-static void
-xpc_send_activate_IRQ_sn2(unsigned long amos_page_pa, int from_nasid,
-			  int to_nasid, int to_phys_cpuid)
-{
-	struct amo *amos = (struct amo *)__va(amos_page_pa +
-					      (XPC_ACTIVATE_IRQ_AMOS_SN2 *
-					      sizeof(struct amo)));
-
-	(void)xpc_send_IRQ_sn2(&amos[BIT_WORD(from_nasid / 2)],
-			       BIT_MASK(from_nasid / 2), to_nasid,
-			       to_phys_cpuid, SGI_XPC_ACTIVATE);
-}
-
-static void
-xpc_send_local_activate_IRQ_sn2(int from_nasid)
-{
-	unsigned long irq_flags;
-	struct amo *amos = (struct amo *)__va(xpc_vars_sn2->amos_page_pa +
-					      (XPC_ACTIVATE_IRQ_AMOS_SN2 *
-					      sizeof(struct amo)));
-
-	/* fake the sending and receipt of an activate IRQ from remote nasid */
-	FETCHOP_STORE_OP(TO_AMO((u64)&amos[BIT_WORD(from_nasid / 2)].variable),
-			 FETCHOP_OR, BIT_MASK(from_nasid / 2));
-
-	spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-	xpc_activate_IRQ_rcvd++;
-	spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
-	wake_up_interruptible(&xpc_activate_IRQ_wq);
-}
-
-/*
- * Functions associated with SGI_XPC_NOTIFY IRQ.
- */
-
-/*
- * Check to see if any chctl flags were sent from the specified partition.
- */
-static void
-xpc_check_for_sent_chctl_flags_sn2(struct xpc_partition *part)
-{
-	union xpc_channel_ctl_flags chctl;
-	unsigned long irq_flags;
-
-	chctl.all_flags = xpc_receive_IRQ_amo_sn2(part->sn.sn2.
-						  local_chctl_amo_va);
-	if (chctl.all_flags == 0)
-		return;
-
-	spin_lock_irqsave(&part->chctl_lock, irq_flags);
-	part->chctl.all_flags |= chctl.all_flags;
-	spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
-
-	dev_dbg(xpc_chan, "received notify IRQ from partid=%d, chctl.all_flags="
-		"0x%llx\n", XPC_PARTID(part), chctl.all_flags);
-
-	xpc_wakeup_channel_mgr(part);
-}
-
-/*
- * Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
- * partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
- * than one partition, we use an amo structure per partition to indicate
- * whether a partition has sent an IRQ or not.  If it has, then wake up the
- * associated kthread to handle it.
- *
- * All SGI_XPC_NOTIFY IRQs received by XPC are the result of IRQs sent by XPC
- * running on other partitions.
- *
- * Noteworthy Arguments:
- *
- *	irq - Interrupt ReQuest number. NOT USED.
- *
- *	dev_id - partid of IRQ's potential sender.
- */
-static irqreturn_t
-xpc_handle_notify_IRQ_sn2(int irq, void *dev_id)
-{
-	short partid = (short)(u64)dev_id;
-	struct xpc_partition *part = &xpc_partitions[partid];
-
-	DBUG_ON(partid < 0 || partid >= XP_MAX_NPARTITIONS_SN2);
-
-	if (xpc_part_ref(part)) {
-		xpc_check_for_sent_chctl_flags_sn2(part);
-
-		xpc_part_deref(part);
-	}
-	return IRQ_HANDLED;
-}
-
-/*
- * Check to see if xpc_handle_notify_IRQ_sn2() dropped any IRQs on the floor
- * because the write to their associated amo variable completed after the IRQ
- * was received.
- */
-static void
-xpc_check_for_dropped_notify_IRQ_sn2(struct timer_list *t)
-{
-	struct xpc_partition *part =
-		from_timer(part, t, sn.sn2.dropped_notify_IRQ_timer);
-
-	if (xpc_part_ref(part)) {
-		xpc_check_for_sent_chctl_flags_sn2(part);
-
-		t->expires = jiffies + XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL;
-		add_timer(t);
-		xpc_part_deref(part);
-	}
-}
-
-/*
- * Send a notify IRQ to the remote partition that is associated with the
- * specified channel.
- */
-static void
-xpc_send_notify_IRQ_sn2(struct xpc_channel *ch, u8 chctl_flag,
-			char *chctl_flag_string, unsigned long *irq_flags)
-{
-	struct xpc_partition *part = &xpc_partitions[ch->partid];
-	struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
-	union xpc_channel_ctl_flags chctl = { 0 };
-	enum xp_retval ret;
-
-	if (likely(part->act_state != XPC_P_AS_DEACTIVATING)) {
-		chctl.flags[ch->number] = chctl_flag;
-		ret = xpc_send_IRQ_sn2(part_sn2->remote_chctl_amo_va,
-				       chctl.all_flags,
-				       part_sn2->notify_IRQ_nasid,
-				       part_sn2->notify_IRQ_phys_cpuid,
-				       SGI_XPC_NOTIFY);
-		dev_dbg(xpc_chan, "%s sent to partid=%d, channel=%d, ret=%d\n",
-			chctl_flag_string, ch->partid, ch->number, ret);
-		if (unlikely(ret != xpSuccess)) {
-			if (irq_flags != NULL)
-				spin_unlock_irqrestore(&ch->lock, *irq_flags);
-			XPC_DEACTIVATE_PARTITION(part, ret);
-			if (irq_flags != NULL)
-				spin_lock_irqsave(&ch->lock, *irq_flags);
-		}
-	}
-}
-
-#define XPC_SEND_NOTIFY_IRQ_SN2(_ch, _ipi_f, _irq_f) \
-		xpc_send_notify_IRQ_sn2(_ch, _ipi_f, #_ipi_f, _irq_f)
-
-/*
- * Make it look like the remote partition, which is associated with the
- * specified channel, sent us a notify IRQ. This faked IRQ will be handled
- * by xpc_check_for_dropped_notify_IRQ_sn2().
- */
-static void
-xpc_send_local_notify_IRQ_sn2(struct xpc_channel *ch, u8 chctl_flag,
-			      char *chctl_flag_string)
-{
-	struct xpc_partition *part = &xpc_partitions[ch->partid];
-	union xpc_channel_ctl_flags chctl = { 0 };
-
-	chctl.flags[ch->number] = chctl_flag;
-	FETCHOP_STORE_OP(TO_AMO((u64)&part->sn.sn2.local_chctl_amo_va->
-				variable), FETCHOP_OR, chctl.all_flags);
-	dev_dbg(xpc_chan, "%s sent local from partid=%d, channel=%d\n",
-		chctl_flag_string, ch->partid, ch->number);
-}
-
-#define XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(_ch, _ipi_f) \
-		xpc_send_local_notify_IRQ_sn2(_ch, _ipi_f, #_ipi_f)
-
-static void
-xpc_send_chctl_closerequest_sn2(struct xpc_channel *ch,
-				unsigned long *irq_flags)
-{
-	struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
-
-	args->reason = ch->reason;
-	XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREQUEST, irq_flags);
-}
-
-static void
-xpc_send_chctl_closereply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
-{
-	XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREPLY, irq_flags);
-}
-
-static void
-xpc_send_chctl_openrequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
-{
-	struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
-
-	args->entry_size = ch->entry_size;
-	args->local_nentries = ch->local_nentries;
-	XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREQUEST, irq_flags);
-}
-
-static void
-xpc_send_chctl_openreply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
-{
-	struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
-
-	args->remote_nentries = ch->remote_nentries;
-	args->local_nentries = ch->local_nentries;
-	args->local_msgqueue_pa = xp_pa(ch->sn.sn2.local_msgqueue);
-	XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREPLY, irq_flags);
-}
-
-static void
-xpc_send_chctl_opencomplete_sn2(struct xpc_channel *ch,
-				unsigned long *irq_flags)
-{
-	XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENCOMPLETE, irq_flags);
-}
-
-static void
-xpc_send_chctl_msgrequest_sn2(struct xpc_channel *ch)
-{
-	XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST, NULL);
-}
-
-static void
-xpc_send_chctl_local_msgrequest_sn2(struct xpc_channel *ch)
-{
-	XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST);
-}
-
-static enum xp_retval
-xpc_save_remote_msgqueue_pa_sn2(struct xpc_channel *ch,
-				unsigned long msgqueue_pa)
-{
-	ch->sn.sn2.remote_msgqueue_pa = msgqueue_pa;
-	return xpSuccess;
-}
-
-/*
- * This next set of functions are used to keep track of when a partition is
- * potentially engaged in accessing memory belonging to another partition.
- */
-
-static void
-xpc_indicate_partition_engaged_sn2(struct xpc_partition *part)
-{
-	unsigned long irq_flags;
-	struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
-					     (XPC_ENGAGED_PARTITIONS_AMO_SN2 *
-					     sizeof(struct amo)));
-
-	local_irq_save(irq_flags);
-
-	/* set bit corresponding to our partid in remote partition's amo */
-	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
-			 BIT(sn_partition_id));
-
-	/*
-	 * We must always use the nofault function regardless of whether we
-	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
-	 * didn't, we'd never know that the other partition is down and would
-	 * keep sending IRQs and amos to it until the heartbeat times out.
-	 */
-	(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
-							       variable),
-						     xp_nofault_PIOR_target));
-
-	local_irq_restore(irq_flags);
-}
-
-static void
-xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
-{
-	struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
-	unsigned long irq_flags;
-	struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
-					     (XPC_ENGAGED_PARTITIONS_AMO_SN2 *
-					     sizeof(struct amo)));
-
-	local_irq_save(irq_flags);
-
-	/* clear bit corresponding to our partid in remote partition's amo */
-	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
-			 ~BIT(sn_partition_id));
-
-	/*
-	 * We must always use the nofault function regardless of whether we
-	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
-	 * didn't, we'd never know that the other partition is down and would
-	 * keep sending IRQs and amos to it until the heartbeat times out.
-	 */
-	(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
-							       variable),
-						     xp_nofault_PIOR_target));
-
-	local_irq_restore(irq_flags);
-
-	/*
-	 * Send activate IRQ to get other side to see that we've cleared our
-	 * bit in their engaged partitions amo.
-	 */
-	xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
-				  cnodeid_to_nasid(0),
-				  part_sn2->activate_IRQ_nasid,
-				  part_sn2->activate_IRQ_phys_cpuid);
-}
-
-static void
-xpc_assume_partition_disengaged_sn2(short partid)
-{
-	struct amo *amo = xpc_vars_sn2->amos_page +
-			  XPC_ENGAGED_PARTITIONS_AMO_SN2;
-
-	/* clear bit(s) based on partid mask in our partition's amo */
-	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
-			 ~BIT(partid));
-}
-
-static int
-xpc_partition_engaged_sn2(short partid)
-{
-	struct amo *amo = xpc_vars_sn2->amos_page +
-			  XPC_ENGAGED_PARTITIONS_AMO_SN2;
-
-	/* our partition's amo variable ANDed with partid mask */
-	return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
-		BIT(partid)) != 0;
-}
-
-static int
-xpc_any_partition_engaged_sn2(void)
-{
-	struct amo *amo = xpc_vars_sn2->amos_page +
-			  XPC_ENGAGED_PARTITIONS_AMO_SN2;
-
-	/* our partition's amo variable */
-	return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) != 0;
-}
-
-/* original protection values for each node */
-static u64 xpc_prot_vec_sn2[MAX_NUMNODES];
-
-/*
- * Change protections to allow amo operations on non-Shub 1.1 systems.
- */
-static enum xp_retval
-xpc_allow_amo_ops_sn2(struct amo *amos_page)
-{
-	enum xp_retval ret = xpSuccess;
-
-	/*
-	 * On SHUB 1.1, we cannot call sn_change_memprotect() since the BIST
-	 * collides with memory operations. On those systems we call
-	 * xpc_allow_amo_ops_shub_wars_1_1_sn2() instead.
-	 */
-	if (!enable_shub_wars_1_1())
-		ret = xp_expand_memprotect(ia64_tpa((u64)amos_page), PAGE_SIZE);
-
-	return ret;
-}
-
-/*
- * Change protections to allow amo operations on Shub 1.1 systems.
- */
-static void
-xpc_allow_amo_ops_shub_wars_1_1_sn2(void)
-{
-	int node;
-	int nasid;
-
-	if (!enable_shub_wars_1_1())
-		return;
-
-	for_each_online_node(node) {
-		nasid = cnodeid_to_nasid(node);
-		/* save current protection values */
-		xpc_prot_vec_sn2[node] =
-		    (u64)HUB_L((u64 *)GLOBAL_MMR_ADDR(nasid,
-						  SH1_MD_DQLP_MMR_DIR_PRIVEC0));
-		/* open up everything */
-		HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
-					     SH1_MD_DQLP_MMR_DIR_PRIVEC0),
-		      -1UL);
-		HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
-					     SH1_MD_DQRP_MMR_DIR_PRIVEC0),
-		      -1UL);
-	}
-}
-
-static enum xp_retval
-xpc_get_partition_rsvd_page_pa_sn2(void *buf, u64 *cookie, unsigned long *rp_pa,
-				   size_t *len)
-{
-	s64 status;
-	enum xp_retval ret;
-
-	status = sn_partition_reserved_page_pa((u64)buf, cookie,
-			(u64 *)rp_pa, (u64 *)len);
-	if (status == SALRET_OK)
-		ret = xpSuccess;
-	else if (status == SALRET_MORE_PASSES)
-		ret = xpNeedMoreInfo;
-	else
-		ret = xpSalError;
-
-	return ret;
-}
-
-
-static int
-xpc_setup_rsvd_page_sn2(struct xpc_rsvd_page *rp)
-{
-	struct amo *amos_page;
-	int i;
-	int ret;
-
-	xpc_vars_sn2 = XPC_RP_VARS(rp);
-
-	rp->sn.sn2.vars_pa = xp_pa(xpc_vars_sn2);
-
-	/* vars_part array follows immediately after vars */
-	xpc_vars_part_sn2 = (struct xpc_vars_part_sn2 *)((u8 *)XPC_RP_VARS(rp) +
-							 XPC_RP_VARS_SIZE);
-
-	/*
-	 * Before clearing xpc_vars_sn2, see if a page of amos had been
-	 * previously allocated. If not we'll need to allocate one and set
-	 * permissions so that cross-partition amos are allowed.
-	 *
-	 * The allocated amo page needs MCA reporting to remain disabled after
-	 * XPC has unloaded.  To make this work, we keep a copy of the pointer
-	 * to this page (i.e., amos_page) in the struct xpc_vars_sn2 structure,
-	 * which is pointed to by the reserved page, and re-use that saved copy
-	 * on subsequent loads of XPC. This amo page is never freed, and its
-	 * memory protections are never restricted.
-	 */
-	amos_page = xpc_vars_sn2->amos_page;
-	if (amos_page == NULL) {
-		amos_page = (struct amo *)TO_AMO(uncached_alloc_page(0, 1));
-		if (amos_page == NULL) {
-			dev_err(xpc_part, "can't allocate page of amos\n");
-			return -ENOMEM;
-		}
-
-		/*
-		 * Open up amo-R/W to cpu.  This is done on Shub 1.1 systems
-		 * when xpc_allow_amo_ops_shub_wars_1_1_sn2() is called.
-		 */
-		ret = xpc_allow_amo_ops_sn2(amos_page);
-		if (ret != xpSuccess) {
-			dev_err(xpc_part, "can't allow amo operations\n");
-			uncached_free_page(__IA64_UNCACHED_OFFSET |
-					   TO_PHYS((u64)amos_page), 1);
-			return -EPERM;
-		}
-	}
-
-	/* clear xpc_vars_sn2 */
-	memset(xpc_vars_sn2, 0, sizeof(struct xpc_vars_sn2));
-
-	xpc_vars_sn2->version = XPC_V_VERSION;
-	xpc_vars_sn2->activate_IRQ_nasid = cpuid_to_nasid(0);
-	xpc_vars_sn2->activate_IRQ_phys_cpuid = cpu_physical_id(0);
-	xpc_vars_sn2->vars_part_pa = xp_pa(xpc_vars_part_sn2);
-	xpc_vars_sn2->amos_page_pa = ia64_tpa((u64)amos_page);
-	xpc_vars_sn2->amos_page = amos_page;	/* save for next load of XPC */
-
-	/* clear xpc_vars_part_sn2 */
-	memset((u64 *)xpc_vars_part_sn2, 0, sizeof(struct xpc_vars_part_sn2) *
-	       XP_MAX_NPARTITIONS_SN2);
-
-	/* initialize the activate IRQ related amo variables */
-	for (i = 0; i < xpc_nasid_mask_nlongs; i++)
-		(void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS_SN2 + i);
-
-	/* initialize the engaged remote partitions related amo variables */
-	(void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO_SN2);
-	(void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO_SN2);
-
-	return 0;
-}
-
-static int
-xpc_hb_allowed_sn2(short partid, void *heartbeating_to_mask)
-{
-	return test_bit(partid, heartbeating_to_mask);
-}
-
-static void
-xpc_allow_hb_sn2(short partid)
-{
-	DBUG_ON(xpc_vars_sn2 == NULL);
-	set_bit(partid, xpc_vars_sn2->heartbeating_to_mask);
-}
-
-static void
-xpc_disallow_hb_sn2(short partid)
-{
-	DBUG_ON(xpc_vars_sn2 == NULL);
-	clear_bit(partid, xpc_vars_sn2->heartbeating_to_mask);
-}
-
-static void
-xpc_disallow_all_hbs_sn2(void)
-{
-	DBUG_ON(xpc_vars_sn2 == NULL);
-	bitmap_zero(xpc_vars_sn2->heartbeating_to_mask, xp_max_npartitions);
-}
-
-static void
-xpc_increment_heartbeat_sn2(void)
-{
-	xpc_vars_sn2->heartbeat++;
-}
-
-static void
-xpc_offline_heartbeat_sn2(void)
-{
-	xpc_increment_heartbeat_sn2();
-	xpc_vars_sn2->heartbeat_offline = 1;
-}
-
-static void
-xpc_online_heartbeat_sn2(void)
-{
-	xpc_increment_heartbeat_sn2();
-	xpc_vars_sn2->heartbeat_offline = 0;
-}
-
-static void
-xpc_heartbeat_init_sn2(void)
-{
-	DBUG_ON(xpc_vars_sn2 == NULL);
-
-	bitmap_zero(xpc_vars_sn2->heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2);
-	xpc_online_heartbeat_sn2();
-}
-
-static void
-xpc_heartbeat_exit_sn2(void)
-{
-	xpc_offline_heartbeat_sn2();
-}
-
-static enum xp_retval
-xpc_get_remote_heartbeat_sn2(struct xpc_partition *part)
-{
-	struct xpc_vars_sn2 *remote_vars;
-	enum xp_retval ret;
-
-	remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
-
-	/* pull the remote vars structure that contains the heartbeat */
-	ret = xp_remote_memcpy(xp_pa(remote_vars),
-			       part->sn.sn2.remote_vars_pa,
-			       XPC_RP_VARS_SIZE);
-	if (ret != xpSuccess)
-		return ret;
-
-	dev_dbg(xpc_part, "partid=%d, heartbeat=%lld, last_heartbeat=%lld, "
-		"heartbeat_offline=%lld, HB_mask[0]=0x%lx\n", XPC_PARTID(part),
-		remote_vars->heartbeat, part->last_heartbeat,
-		remote_vars->heartbeat_offline,
-		remote_vars->heartbeating_to_mask[0]);
-
-	if ((remote_vars->heartbeat == part->last_heartbeat &&
-	    !remote_vars->heartbeat_offline) ||
-	    !xpc_hb_allowed_sn2(sn_partition_id,
-				remote_vars->heartbeating_to_mask)) {
-		ret = xpNoHeartbeat;
-	} else {
-		part->last_heartbeat = remote_vars->heartbeat;
-	}
-
-	return ret;
-}
-
-/*
- * Get a copy of the remote partition's XPC variables from the reserved page.
- *
- * remote_vars points to a buffer that is cacheline aligned for BTE copies and
- * assumed to be of size XPC_RP_VARS_SIZE.
- */
-static enum xp_retval
-xpc_get_remote_vars_sn2(unsigned long remote_vars_pa,
-			struct xpc_vars_sn2 *remote_vars)
-{
-	enum xp_retval ret;
-
-	if (remote_vars_pa == 0)
-		return xpVarsNotSet;
-
-	/* pull over the cross partition variables */
-	ret = xp_remote_memcpy(xp_pa(remote_vars), remote_vars_pa,
-			       XPC_RP_VARS_SIZE);
-	if (ret != xpSuccess)
-		return ret;
-
-	if (XPC_VERSION_MAJOR(remote_vars->version) !=
-	    XPC_VERSION_MAJOR(XPC_V_VERSION)) {
-		return xpBadVersion;
-	}
-
-	return xpSuccess;
-}
-
-static void
-xpc_request_partition_activation_sn2(struct xpc_rsvd_page *remote_rp,
-				     unsigned long remote_rp_pa, int nasid)
-{
-	xpc_send_local_activate_IRQ_sn2(nasid);
-}
-
-static void
-xpc_request_partition_reactivation_sn2(struct xpc_partition *part)
-{
-	xpc_send_local_activate_IRQ_sn2(part->sn.sn2.activate_IRQ_nasid);
-}
-
-static void
-xpc_request_partition_deactivation_sn2(struct xpc_partition *part)
-{
-	struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
-	unsigned long irq_flags;
-	struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
-					     (XPC_DEACTIVATE_REQUEST_AMO_SN2 *
-					     sizeof(struct amo)));
-
-	local_irq_save(irq_flags);
-
-	/* set bit corresponding to our partid in remote partition's amo */
-	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
-			 BIT(sn_partition_id));
-
-	/*
-	 * We must always use the nofault function regardless of whether we
-	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
-	 * didn't, we'd never know that the other partition is down and would
-	 * keep sending IRQs and amos to it until the heartbeat times out.
-	 */
-	(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
-							       variable),
-						     xp_nofault_PIOR_target));
-
-	local_irq_restore(irq_flags);
-
-	/*
-	 * Send activate IRQ to get other side to see that we've set our
-	 * bit in their deactivate request amo.
-	 */
-	xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
-				  cnodeid_to_nasid(0),
-				  part_sn2->activate_IRQ_nasid,
-				  part_sn2->activate_IRQ_phys_cpuid);
-}
-
-static void
-xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part)
-{
-	unsigned long irq_flags;
-	struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
-					     (XPC_DEACTIVATE_REQUEST_AMO_SN2 *
-					     sizeof(struct amo)));
-
-	local_irq_save(irq_flags);
-
-	/* clear bit corresponding to our partid in remote partition's amo */
-	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
-			 ~BIT(sn_partition_id));
-
-	/*
-	 * We must always use the nofault function regardless of whether we
-	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
-	 * didn't, we'd never know that the other partition is down and would
-	 * keep sending IRQs and amos to it until the heartbeat times out.
-	 */
-	(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
-							       variable),
-						     xp_nofault_PIOR_target));
-
-	local_irq_restore(irq_flags);
-}
-
-static int
-xpc_partition_deactivation_requested_sn2(short partid)
-{
-	struct amo *amo = xpc_vars_sn2->amos_page +
-			  XPC_DEACTIVATE_REQUEST_AMO_SN2;
-
-	/* our partition's amo variable ANDed with partid mask */
-	return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
-		BIT(partid)) != 0;
-}
-
-/*
- * Update the remote partition's info.
- */
-static void
-xpc_update_partition_info_sn2(struct xpc_partition *part, u8 remote_rp_version,
-			      unsigned long *remote_rp_ts_jiffies,
-			      unsigned long remote_rp_pa,
-			      unsigned long remote_vars_pa,
-			      struct xpc_vars_sn2 *remote_vars)
-{
-	struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
-
-	part->remote_rp_version = remote_rp_version;
-	dev_dbg(xpc_part, "  remote_rp_version = 0x%016x\n",
-		part->remote_rp_version);
-
-	part->remote_rp_ts_jiffies = *remote_rp_ts_jiffies;
-	dev_dbg(xpc_part, "  remote_rp_ts_jiffies = 0x%016lx\n",
-		part->remote_rp_ts_jiffies);
-
-	part->remote_rp_pa = remote_rp_pa;
-	dev_dbg(xpc_part, "  remote_rp_pa = 0x%016lx\n", part->remote_rp_pa);
-
-	part_sn2->remote_vars_pa = remote_vars_pa;
-	dev_dbg(xpc_part, "  remote_vars_pa = 0x%016lx\n",
-		part_sn2->remote_vars_pa);
-
-	part->last_heartbeat = remote_vars->heartbeat - 1;
-	dev_dbg(xpc_part, "  last_heartbeat = 0x%016llx\n",
-		part->last_heartbeat);
-
-	part_sn2->remote_vars_part_pa = remote_vars->vars_part_pa;
-	dev_dbg(xpc_part, "  remote_vars_part_pa = 0x%016lx\n",
-		part_sn2->remote_vars_part_pa);
-
-	part_sn2->activate_IRQ_nasid = remote_vars->activate_IRQ_nasid;
-	dev_dbg(xpc_part, "  activate_IRQ_nasid = 0x%x\n",
-		part_sn2->activate_IRQ_nasid);
-
-	part_sn2->activate_IRQ_phys_cpuid =
-	    remote_vars->activate_IRQ_phys_cpuid;
-	dev_dbg(xpc_part, "  activate_IRQ_phys_cpuid = 0x%x\n",
-		part_sn2->activate_IRQ_phys_cpuid);
-
-	part_sn2->remote_amos_page_pa = remote_vars->amos_page_pa;
-	dev_dbg(xpc_part, "  remote_amos_page_pa = 0x%lx\n",
-		part_sn2->remote_amos_page_pa);
-
-	part_sn2->remote_vars_version = remote_vars->version;
-	dev_dbg(xpc_part, "  remote_vars_version = 0x%x\n",
-		part_sn2->remote_vars_version);
-}
-
-/*
- * Prior code has determined the nasid which generated a activate IRQ.
- * Inspect that nasid to determine if its partition needs to be activated
- * or deactivated.
- *
- * A partition is considered "awaiting activation" if our partition
- * flags indicate it is not active and it has a heartbeat.  A
- * partition is considered "awaiting deactivation" if our partition
- * flags indicate it is active but it has no heartbeat or it is not
- * sending its heartbeat to us.
- *
- * To determine the heartbeat, the remote nasid must have a properly
- * initialized reserved page.
- */
-static void
-xpc_identify_activate_IRQ_req_sn2(int nasid)
-{
-	struct xpc_rsvd_page *remote_rp;
-	struct xpc_vars_sn2 *remote_vars;
-	unsigned long remote_rp_pa;
-	unsigned long remote_vars_pa;
-	int remote_rp_version;
-	int reactivate = 0;
-	unsigned long remote_rp_ts_jiffies = 0;
-	short partid;
-	struct xpc_partition *part;
-	struct xpc_partition_sn2 *part_sn2;
-	enum xp_retval ret;
-
-	/* pull over the reserved page structure */
-
-	remote_rp = (struct xpc_rsvd_page *)xpc_remote_copy_buffer_sn2;
-
-	ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rp_pa);
-	if (ret != xpSuccess) {
-		dev_warn(xpc_part, "unable to get reserved page from nasid %d, "
-			 "which sent interrupt, reason=%d\n", nasid, ret);
-		return;
-	}
-
-	remote_vars_pa = remote_rp->sn.sn2.vars_pa;
-	remote_rp_version = remote_rp->version;
-	remote_rp_ts_jiffies = remote_rp->ts_jiffies;
-
-	partid = remote_rp->SAL_partid;
-	part = &xpc_partitions[partid];
-	part_sn2 = &part->sn.sn2;
-
-	/* pull over the cross partition variables */
-
-	remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
-
-	ret = xpc_get_remote_vars_sn2(remote_vars_pa, remote_vars);
-	if (ret != xpSuccess) {
-		dev_warn(xpc_part, "unable to get XPC variables from nasid %d, "
-			 "which sent interrupt, reason=%d\n", nasid, ret);
-
-		XPC_DEACTIVATE_PARTITION(part, ret);
-		return;
-	}
-
-	part->activate_IRQ_rcvd++;
-
-	dev_dbg(xpc_part, "partid for nasid %d is %d; IRQs = %d; HB = "
-		"%lld:0x%lx\n", (int)nasid, (int)partid,
-		part->activate_IRQ_rcvd,
-		remote_vars->heartbeat, remote_vars->heartbeating_to_mask[0]);
-
-	if (xpc_partition_disengaged(part) &&
-	    part->act_state == XPC_P_AS_INACTIVE) {
-
-		xpc_update_partition_info_sn2(part, remote_rp_version,
-					      &remote_rp_ts_jiffies,
-					      remote_rp_pa, remote_vars_pa,
-					      remote_vars);
-
-		if (xpc_partition_deactivation_requested_sn2(partid)) {
-			/*
-			 * Other side is waiting on us to deactivate even though
-			 * we already have.
-			 */
-			return;
-		}
-
-		xpc_activate_partition(part);
-		return;
-	}
-
-	DBUG_ON(part->remote_rp_version == 0);
-	DBUG_ON(part_sn2->remote_vars_version == 0);
-
-	if (remote_rp_ts_jiffies != part->remote_rp_ts_jiffies) {
-
-		/* the other side rebooted */
-
-		DBUG_ON(xpc_partition_engaged_sn2(partid));
-		DBUG_ON(xpc_partition_deactivation_requested_sn2(partid));
-
-		xpc_update_partition_info_sn2(part, remote_rp_version,
-					      &remote_rp_ts_jiffies,
-					      remote_rp_pa, remote_vars_pa,
-					      remote_vars);
-		reactivate = 1;
-	}
-
-	if (part->disengage_timeout > 0 && !xpc_partition_disengaged(part)) {
-		/* still waiting on other side to disengage from us */
-		return;
-	}
-
-	if (reactivate)
-		XPC_DEACTIVATE_PARTITION(part, xpReactivating);
-	else if (xpc_partition_deactivation_requested_sn2(partid))
-		XPC_DEACTIVATE_PARTITION(part, xpOtherGoingDown);
-}
-
-/*
- * Loop through the activation amo variables and process any bits
- * which are set.  Each bit indicates a nasid sending a partition
- * activation or deactivation request.
- *
- * Return #of IRQs detected.
- */
-int
-xpc_identify_activate_IRQ_sender_sn2(void)
-{
-	int l;
-	int b;
-	unsigned long nasid_mask_long;
-	u64 nasid;		/* remote nasid */
-	int n_IRQs_detected = 0;
-	struct amo *act_amos;
-
-	act_amos = xpc_vars_sn2->amos_page + XPC_ACTIVATE_IRQ_AMOS_SN2;
-
-	/* scan through activate amo variables looking for non-zero entries */
-	for (l = 0; l < xpc_nasid_mask_nlongs; l++) {
-
-		if (xpc_exiting)
-			break;
-
-		nasid_mask_long = xpc_receive_IRQ_amo_sn2(&act_amos[l]);
-
-		b = find_first_bit(&nasid_mask_long, BITS_PER_LONG);
-		if (b >= BITS_PER_LONG) {
-			/* no IRQs from nasids in this amo variable */
-			continue;
-		}
-
-		dev_dbg(xpc_part, "amo[%d] gave back 0x%lx\n", l,
-			nasid_mask_long);
-
-		/*
-		 * If this nasid has been added to the machine since
-		 * our partition was reset, this will retain the
-		 * remote nasid in our reserved pages machine mask.
-		 * This is used in the event of module reload.
-		 */
-		xpc_mach_nasids[l] |= nasid_mask_long;
-
-		/* locate the nasid(s) which sent interrupts */
-
-		do {
-			n_IRQs_detected++;
-			nasid = (l * BITS_PER_LONG + b) * 2;
-			dev_dbg(xpc_part, "interrupt from nasid %lld\n", nasid);
-			xpc_identify_activate_IRQ_req_sn2(nasid);
-
-			b = find_next_bit(&nasid_mask_long, BITS_PER_LONG,
-					  b + 1);
-		} while (b < BITS_PER_LONG);
-	}
-	return n_IRQs_detected;
-}
-
-static void
-xpc_process_activate_IRQ_rcvd_sn2(void)
-{
-	unsigned long irq_flags;
-	int n_IRQs_expected;
-	int n_IRQs_detected;
-
-	spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-	n_IRQs_expected = xpc_activate_IRQ_rcvd;
-	xpc_activate_IRQ_rcvd = 0;
-	spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
-	n_IRQs_detected = xpc_identify_activate_IRQ_sender_sn2();
-	if (n_IRQs_detected < n_IRQs_expected) {
-		/* retry once to help avoid missing amo */
-		(void)xpc_identify_activate_IRQ_sender_sn2();
-	}
-}
-
-/*
- * Setup the channel structures that are sn2 specific.
- */
-static enum xp_retval
-xpc_setup_ch_structures_sn2(struct xpc_partition *part)
-{
-	struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
-	struct xpc_channel_sn2 *ch_sn2;
-	enum xp_retval retval;
-	int ret;
-	int cpuid;
-	int ch_number;
-	struct timer_list *timer;
-	short partid = XPC_PARTID(part);
-
-	/* allocate all the required GET/PUT values */
-
-	part_sn2->local_GPs =
-	    xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
-					  &part_sn2->local_GPs_base);
-	if (part_sn2->local_GPs == NULL) {
-		dev_err(xpc_chan, "can't get memory for local get/put "
-			"values\n");
-		return xpNoMemory;
-	}
-
-	part_sn2->remote_GPs =
-	    xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
-					  &part_sn2->remote_GPs_base);
-	if (part_sn2->remote_GPs == NULL) {
-		dev_err(xpc_chan, "can't get memory for remote get/put "
-			"values\n");
-		retval = xpNoMemory;
-		goto out_1;
-	}
-
-	part_sn2->remote_GPs_pa = 0;
-
-	/* allocate all the required open and close args */
-
-	part_sn2->local_openclose_args =
-	    xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE,
-					  GFP_KERNEL, &part_sn2->
-					  local_openclose_args_base);
-	if (part_sn2->local_openclose_args == NULL) {
-		dev_err(xpc_chan, "can't get memory for local connect args\n");
-		retval = xpNoMemory;
-		goto out_2;
-	}
-
-	part_sn2->remote_openclose_args_pa = 0;
-
-	part_sn2->local_chctl_amo_va = xpc_init_IRQ_amo_sn2(partid);
-
-	part_sn2->notify_IRQ_nasid = 0;
-	part_sn2->notify_IRQ_phys_cpuid = 0;
-	part_sn2->remote_chctl_amo_va = NULL;
-
-	sprintf(part_sn2->notify_IRQ_owner, "xpc%02d", partid);
-	ret = request_irq(SGI_XPC_NOTIFY, xpc_handle_notify_IRQ_sn2,
-			  IRQF_SHARED, part_sn2->notify_IRQ_owner,
-			  (void *)(u64)partid);
-	if (ret != 0) {
-		dev_err(xpc_chan, "can't register NOTIFY IRQ handler, "
-			"errno=%d\n", -ret);
-		retval = xpLackOfResources;
-		goto out_3;
-	}
-
-	/* Setup a timer to check for dropped notify IRQs */
-	timer = &part_sn2->dropped_notify_IRQ_timer;
-	timer_setup(timer, xpc_check_for_dropped_notify_IRQ_sn2, 0);
-	timer->expires = jiffies + XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL;
-	add_timer(timer);
-
-	for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
-		ch_sn2 = &part->channels[ch_number].sn.sn2;
-
-		ch_sn2->local_GP = &part_sn2->local_GPs[ch_number];
-		ch_sn2->local_openclose_args =
-		    &part_sn2->local_openclose_args[ch_number];
-
-		mutex_init(&ch_sn2->msg_to_pull_mutex);
-	}
-
-	/*
-	 * Setup the per partition specific variables required by the
-	 * remote partition to establish channel connections with us.
-	 *
-	 * The setting of the magic # indicates that these per partition
-	 * specific variables are ready to be used.
-	 */
-	xpc_vars_part_sn2[partid].GPs_pa = xp_pa(part_sn2->local_GPs);
-	xpc_vars_part_sn2[partid].openclose_args_pa =
-	    xp_pa(part_sn2->local_openclose_args);
-	xpc_vars_part_sn2[partid].chctl_amo_pa =
-	    xp_pa(part_sn2->local_chctl_amo_va);
-	cpuid = raw_smp_processor_id();	/* any CPU in this partition will do */
-	xpc_vars_part_sn2[partid].notify_IRQ_nasid = cpuid_to_nasid(cpuid);
-	xpc_vars_part_sn2[partid].notify_IRQ_phys_cpuid =
-	    cpu_physical_id(cpuid);
-	xpc_vars_part_sn2[partid].nchannels = part->nchannels;
-	xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC1_SN2;
-
-	return xpSuccess;
-
-	/* setup of ch structures failed */
-out_3:
-	kfree(part_sn2->local_openclose_args_base);
-	part_sn2->local_openclose_args = NULL;
-out_2:
-	kfree(part_sn2->remote_GPs_base);
-	part_sn2->remote_GPs = NULL;
-out_1:
-	kfree(part_sn2->local_GPs_base);
-	part_sn2->local_GPs = NULL;
-	return retval;
-}
-
-/*
- * Teardown the channel structures that are sn2 specific.
- */
-static void
-xpc_teardown_ch_structures_sn2(struct xpc_partition *part)
-{
-	struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
-	short partid = XPC_PARTID(part);
-
-	/*
-	 * Indicate that the variables specific to the remote partition are no
-	 * longer available for its use.
-	 */
-	xpc_vars_part_sn2[partid].magic = 0;
-
-	/* in case we've still got outstanding timers registered... */
-	del_timer_sync(&part_sn2->dropped_notify_IRQ_timer);
-	free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
-
-	kfree(part_sn2->local_openclose_args_base);
-	part_sn2->local_openclose_args = NULL;
-	kfree(part_sn2->remote_GPs_base);
-	part_sn2->remote_GPs = NULL;
-	kfree(part_sn2->local_GPs_base);
-	part_sn2->local_GPs = NULL;
-	part_sn2->local_chctl_amo_va = NULL;
-}
-
-/*
- * Create a wrapper that hides the underlying mechanism for pulling a cacheline
- * (or multiple cachelines) from a remote partition.
- *
- * src_pa must be a cacheline aligned physical address on the remote partition.
- * dst must be a cacheline aligned virtual address on this partition.
- * cnt must be cacheline sized
- */
-/* ??? Replace this function by call to xp_remote_memcpy() or bte_copy()? */
-static enum xp_retval
-xpc_pull_remote_cachelines_sn2(struct xpc_partition *part, void *dst,
-			       const unsigned long src_pa, size_t cnt)
-{
-	enum xp_retval ret;
-
-	DBUG_ON(src_pa != L1_CACHE_ALIGN(src_pa));
-	DBUG_ON((unsigned long)dst != L1_CACHE_ALIGN((unsigned long)dst));
-	DBUG_ON(cnt != L1_CACHE_ALIGN(cnt));
-
-	if (part->act_state == XPC_P_AS_DEACTIVATING)
-		return part->reason;
-
-	ret = xp_remote_memcpy(xp_pa(dst), src_pa, cnt);
-	if (ret != xpSuccess) {
-		dev_dbg(xpc_chan, "xp_remote_memcpy() from partition %d failed,"
-			" ret=%d\n", XPC_PARTID(part), ret);
-	}
-	return ret;
-}
-
-/*
- * Pull the remote per partition specific variables from the specified
- * partition.
- */
-static enum xp_retval
-xpc_pull_remote_vars_part_sn2(struct xpc_partition *part)
-{
-	struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
-	u8 buffer[L1_CACHE_BYTES * 2];
-	struct xpc_vars_part_sn2 *pulled_entry_cacheline =
-	    (struct xpc_vars_part_sn2 *)L1_CACHE_ALIGN((u64)buffer);
-	struct xpc_vars_part_sn2 *pulled_entry;
-	unsigned long remote_entry_cacheline_pa;
-	unsigned long remote_entry_pa;
-	short partid = XPC_PARTID(part);
-	enum xp_retval ret;
-
-	/* pull the cacheline that contains the variables we're interested in */
-
-	DBUG_ON(part_sn2->remote_vars_part_pa !=
-		L1_CACHE_ALIGN(part_sn2->remote_vars_part_pa));
-	DBUG_ON(sizeof(struct xpc_vars_part_sn2) != L1_CACHE_BYTES / 2);
-
-	remote_entry_pa = part_sn2->remote_vars_part_pa +
-	    sn_partition_id * sizeof(struct xpc_vars_part_sn2);
-
-	remote_entry_cacheline_pa = (remote_entry_pa & ~(L1_CACHE_BYTES - 1));
-
-	pulled_entry = (struct xpc_vars_part_sn2 *)((u64)pulled_entry_cacheline
-						    + (remote_entry_pa &
-						    (L1_CACHE_BYTES - 1)));
-
-	ret = xpc_pull_remote_cachelines_sn2(part, pulled_entry_cacheline,
-					     remote_entry_cacheline_pa,
-					     L1_CACHE_BYTES);
-	if (ret != xpSuccess) {
-		dev_dbg(xpc_chan, "failed to pull XPC vars_part from "
-			"partition %d, ret=%d\n", partid, ret);
-		return ret;
-	}
-
-	/* see if they've been set up yet */
-
-	if (pulled_entry->magic != XPC_VP_MAGIC1_SN2 &&
-	    pulled_entry->magic != XPC_VP_MAGIC2_SN2) {
-
-		if (pulled_entry->magic != 0) {
-			dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
-				"partition %d has bad magic value (=0x%llx)\n",
-				partid, sn_partition_id, pulled_entry->magic);
-			return xpBadMagic;
-		}
-
-		/* they've not been initialized yet */
-		return xpRetry;
-	}
-
-	if (xpc_vars_part_sn2[partid].magic == XPC_VP_MAGIC1_SN2) {
-
-		/* validate the variables */
-
-		if (pulled_entry->GPs_pa == 0 ||
-		    pulled_entry->openclose_args_pa == 0 ||
-		    pulled_entry->chctl_amo_pa == 0) {
-
-			dev_err(xpc_chan, "partition %d's XPC vars_part for "
-				"partition %d are not valid\n", partid,
-				sn_partition_id);
-			return xpInvalidAddress;
-		}
-
-		/* the variables we imported look to be valid */
-
-		part_sn2->remote_GPs_pa = pulled_entry->GPs_pa;
-		part_sn2->remote_openclose_args_pa =
-		    pulled_entry->openclose_args_pa;
-		part_sn2->remote_chctl_amo_va =
-		    (struct amo *)__va(pulled_entry->chctl_amo_pa);
-		part_sn2->notify_IRQ_nasid = pulled_entry->notify_IRQ_nasid;
-		part_sn2->notify_IRQ_phys_cpuid =
-		    pulled_entry->notify_IRQ_phys_cpuid;
-
-		if (part->nchannels > pulled_entry->nchannels)
-			part->nchannels = pulled_entry->nchannels;
-
-		/* let the other side know that we've pulled their variables */
-
-		xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC2_SN2;
-	}
-
-	if (pulled_entry->magic == XPC_VP_MAGIC1_SN2)
-		return xpRetry;
-
-	return xpSuccess;
-}
-
-/*
- * Establish first contact with the remote partititon. This involves pulling
- * the XPC per partition variables from the remote partition and waiting for
- * the remote partition to pull ours.
- */
-static enum xp_retval
-xpc_make_first_contact_sn2(struct xpc_partition *part)
-{
-	struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
-	enum xp_retval ret;
-
-	/*
-	 * Register the remote partition's amos with SAL so it can handle
-	 * and cleanup errors within that address range should the remote
-	 * partition go down. We don't unregister this range because it is
-	 * difficult to tell when outstanding writes to the remote partition
-	 * are finished and thus when it is safe to unregister. This should
-	 * not result in wasted space in the SAL xp_addr_region table because
-	 * we should get the same page for remote_amos_page_pa after module
-	 * reloads and system reboots.
-	 */
-	if (sn_register_xp_addr_region(part_sn2->remote_amos_page_pa,
-				       PAGE_SIZE, 1) < 0) {
-		dev_warn(xpc_part, "xpc_activating(%d) failed to register "
-			 "xp_addr region\n", XPC_PARTID(part));
-
-		ret = xpPhysAddrRegFailed;
-		XPC_DEACTIVATE_PARTITION(part, ret);
-		return ret;
-	}
-
-	/*
-	 * Send activate IRQ to get other side to activate if they've not
-	 * already begun to do so.
-	 */
-	xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
-				  cnodeid_to_nasid(0),
-				  part_sn2->activate_IRQ_nasid,
-				  part_sn2->activate_IRQ_phys_cpuid);
-
-	while ((ret = xpc_pull_remote_vars_part_sn2(part)) != xpSuccess) {
-		if (ret != xpRetry) {
-			XPC_DEACTIVATE_PARTITION(part, ret);
-			return ret;
-		}
-
-		dev_dbg(xpc_part, "waiting to make first contact with "
-			"partition %d\n", XPC_PARTID(part));
-
-		/* wait a 1/4 of a second or so */
-		(void)msleep_interruptible(250);
-
-		if (part->act_state == XPC_P_AS_DEACTIVATING)
-			return part->reason;
-	}
-
-	return xpSuccess;
-}
-
-/*
- * Get the chctl flags and pull the openclose args and/or remote GPs as needed.
- */
-static u64
-xpc_get_chctl_all_flags_sn2(struct xpc_partition *part)
-{
-	struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
-	unsigned long irq_flags;
-	union xpc_channel_ctl_flags chctl;
-	enum xp_retval ret;
-
-	/*
-	 * See if there are any chctl flags to be handled.
-	 */
-
-	spin_lock_irqsave(&part->chctl_lock, irq_flags);
-	chctl = part->chctl;
-	if (chctl.all_flags != 0)
-		part->chctl.all_flags = 0;
-
-	spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
-
-	if (xpc_any_openclose_chctl_flags_set(&chctl)) {
-		ret = xpc_pull_remote_cachelines_sn2(part, part->
-						     remote_openclose_args,
-						     part_sn2->
-						     remote_openclose_args_pa,
-						     XPC_OPENCLOSE_ARGS_SIZE);
-		if (ret != xpSuccess) {
-			XPC_DEACTIVATE_PARTITION(part, ret);
-
-			dev_dbg(xpc_chan, "failed to pull openclose args from "
-				"partition %d, ret=%d\n", XPC_PARTID(part),
-				ret);
-
-			/* don't bother processing chctl flags anymore */
-			chctl.all_flags = 0;
-		}
-	}
-
-	if (xpc_any_msg_chctl_flags_set(&chctl)) {
-		ret = xpc_pull_remote_cachelines_sn2(part, part_sn2->remote_GPs,
-						     part_sn2->remote_GPs_pa,
-						     XPC_GP_SIZE);
-		if (ret != xpSuccess) {
-			XPC_DEACTIVATE_PARTITION(part, ret);
-
-			dev_dbg(xpc_chan, "failed to pull GPs from partition "
-				"%d, ret=%d\n", XPC_PARTID(part), ret);
-
-			/* don't bother processing chctl flags anymore */
-			chctl.all_flags = 0;
-		}
-	}
-
-	return chctl.all_flags;
-}
-
-/*
- * Allocate the local message queue and the notify queue.
- */
-static enum xp_retval
-xpc_allocate_local_msgqueue_sn2(struct xpc_channel *ch)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	unsigned long irq_flags;
-	int nentries;
-	size_t nbytes;
-
-	for (nentries = ch->local_nentries; nentries > 0; nentries--) {
-
-		nbytes = nentries * ch->entry_size;
-		ch_sn2->local_msgqueue =
-		    xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL,
-						  &ch_sn2->local_msgqueue_base);
-		if (ch_sn2->local_msgqueue == NULL)
-			continue;
-
-		nbytes = nentries * sizeof(struct xpc_notify_sn2);
-		ch_sn2->notify_queue = kzalloc(nbytes, GFP_KERNEL);
-		if (ch_sn2->notify_queue == NULL) {
-			kfree(ch_sn2->local_msgqueue_base);
-			ch_sn2->local_msgqueue = NULL;
-			continue;
-		}
-
-		spin_lock_irqsave(&ch->lock, irq_flags);
-		if (nentries < ch->local_nentries) {
-			dev_dbg(xpc_chan, "nentries=%d local_nentries=%d, "
-				"partid=%d, channel=%d\n", nentries,
-				ch->local_nentries, ch->partid, ch->number);
-
-			ch->local_nentries = nentries;
-		}
-		spin_unlock_irqrestore(&ch->lock, irq_flags);
-		return xpSuccess;
-	}
-
-	dev_dbg(xpc_chan, "can't get memory for local message queue and notify "
-		"queue, partid=%d, channel=%d\n", ch->partid, ch->number);
-	return xpNoMemory;
-}
-
-/*
- * Allocate the cached remote message queue.
- */
-static enum xp_retval
-xpc_allocate_remote_msgqueue_sn2(struct xpc_channel *ch)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	unsigned long irq_flags;
-	int nentries;
-	size_t nbytes;
-
-	DBUG_ON(ch->remote_nentries <= 0);
-
-	for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
-
-		nbytes = nentries * ch->entry_size;
-		ch_sn2->remote_msgqueue =
-		    xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL, &ch_sn2->
-						  remote_msgqueue_base);
-		if (ch_sn2->remote_msgqueue == NULL)
-			continue;
-
-		spin_lock_irqsave(&ch->lock, irq_flags);
-		if (nentries < ch->remote_nentries) {
-			dev_dbg(xpc_chan, "nentries=%d remote_nentries=%d, "
-				"partid=%d, channel=%d\n", nentries,
-				ch->remote_nentries, ch->partid, ch->number);
-
-			ch->remote_nentries = nentries;
-		}
-		spin_unlock_irqrestore(&ch->lock, irq_flags);
-		return xpSuccess;
-	}
-
-	dev_dbg(xpc_chan, "can't get memory for cached remote message queue, "
-		"partid=%d, channel=%d\n", ch->partid, ch->number);
-	return xpNoMemory;
-}
-
-/*
- * Allocate message queues and other stuff associated with a channel.
- *
- * Note: Assumes all of the channel sizes are filled in.
- */
-static enum xp_retval
-xpc_setup_msg_structures_sn2(struct xpc_channel *ch)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	enum xp_retval ret;
-
-	DBUG_ON(ch->flags & XPC_C_SETUP);
-
-	ret = xpc_allocate_local_msgqueue_sn2(ch);
-	if (ret == xpSuccess) {
-
-		ret = xpc_allocate_remote_msgqueue_sn2(ch);
-		if (ret != xpSuccess) {
-			kfree(ch_sn2->local_msgqueue_base);
-			ch_sn2->local_msgqueue = NULL;
-			kfree(ch_sn2->notify_queue);
-			ch_sn2->notify_queue = NULL;
-		}
-	}
-	return ret;
-}
-
-/*
- * Free up message queues and other stuff that were allocated for the specified
- * channel.
- */
-static void
-xpc_teardown_msg_structures_sn2(struct xpc_channel *ch)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-
-	lockdep_assert_held(&ch->lock);
-
-	ch_sn2->remote_msgqueue_pa = 0;
-
-	ch_sn2->local_GP->get = 0;
-	ch_sn2->local_GP->put = 0;
-	ch_sn2->remote_GP.get = 0;
-	ch_sn2->remote_GP.put = 0;
-	ch_sn2->w_local_GP.get = 0;
-	ch_sn2->w_local_GP.put = 0;
-	ch_sn2->w_remote_GP.get = 0;
-	ch_sn2->w_remote_GP.put = 0;
-	ch_sn2->next_msg_to_pull = 0;
-
-	if (ch->flags & XPC_C_SETUP) {
-		dev_dbg(xpc_chan, "ch->flags=0x%x, partid=%d, channel=%d\n",
-			ch->flags, ch->partid, ch->number);
-
-		kfree(ch_sn2->local_msgqueue_base);
-		ch_sn2->local_msgqueue = NULL;
-		kfree(ch_sn2->remote_msgqueue_base);
-		ch_sn2->remote_msgqueue = NULL;
-		kfree(ch_sn2->notify_queue);
-		ch_sn2->notify_queue = NULL;
-	}
-}
-
-/*
- * Notify those who wanted to be notified upon delivery of their message.
- */
-static void
-xpc_notify_senders_sn2(struct xpc_channel *ch, enum xp_retval reason, s64 put)
-{
-	struct xpc_notify_sn2 *notify;
-	u8 notify_type;
-	s64 get = ch->sn.sn2.w_remote_GP.get - 1;
-
-	while (++get < put && atomic_read(&ch->n_to_notify) > 0) {
-
-		notify = &ch->sn.sn2.notify_queue[get % ch->local_nentries];
-
-		/*
-		 * See if the notify entry indicates it was associated with
-		 * a message who's sender wants to be notified. It is possible
-		 * that it is, but someone else is doing or has done the
-		 * notification.
-		 */
-		notify_type = notify->type;
-		if (notify_type == 0 ||
-		    cmpxchg(&notify->type, notify_type, 0) != notify_type) {
-			continue;
-		}
-
-		DBUG_ON(notify_type != XPC_N_CALL);
-
-		atomic_dec(&ch->n_to_notify);
-
-		if (notify->func != NULL) {
-			dev_dbg(xpc_chan, "notify->func() called, notify=0x%p "
-				"msg_number=%lld partid=%d channel=%d\n",
-				(void *)notify, get, ch->partid, ch->number);
-
-			notify->func(reason, ch->partid, ch->number,
-				     notify->key);
-
-			dev_dbg(xpc_chan, "notify->func() returned, notify=0x%p"
-				" msg_number=%lld partid=%d channel=%d\n",
-				(void *)notify, get, ch->partid, ch->number);
-		}
-	}
-}
-
-static void
-xpc_notify_senders_of_disconnect_sn2(struct xpc_channel *ch)
-{
-	xpc_notify_senders_sn2(ch, ch->reason, ch->sn.sn2.w_local_GP.put);
-}
-
-/*
- * Clear some of the msg flags in the local message queue.
- */
-static inline void
-xpc_clear_local_msgqueue_flags_sn2(struct xpc_channel *ch)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	struct xpc_msg_sn2 *msg;
-	s64 get;
-
-	get = ch_sn2->w_remote_GP.get;
-	do {
-		msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->local_msgqueue +
-					     (get % ch->local_nentries) *
-					     ch->entry_size);
-		DBUG_ON(!(msg->flags & XPC_M_SN2_READY));
-		msg->flags = 0;
-	} while (++get < ch_sn2->remote_GP.get);
-}
-
-/*
- * Clear some of the msg flags in the remote message queue.
- */
-static inline void
-xpc_clear_remote_msgqueue_flags_sn2(struct xpc_channel *ch)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	struct xpc_msg_sn2 *msg;
-	s64 put, remote_nentries = ch->remote_nentries;
-
-	/* flags are zeroed when the buffer is allocated */
-	if (ch_sn2->remote_GP.put < remote_nentries)
-		return;
-
-	put = max(ch_sn2->w_remote_GP.put, remote_nentries);
-	do {
-		msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue +
-					     (put % remote_nentries) *
-					     ch->entry_size);
-		DBUG_ON(!(msg->flags & XPC_M_SN2_READY));
-		DBUG_ON(!(msg->flags & XPC_M_SN2_DONE));
-		DBUG_ON(msg->number != put - remote_nentries);
-		msg->flags = 0;
-	} while (++put < ch_sn2->remote_GP.put);
-}
-
-static int
-xpc_n_of_deliverable_payloads_sn2(struct xpc_channel *ch)
-{
-	return ch->sn.sn2.w_remote_GP.put - ch->sn.sn2.w_local_GP.get;
-}
-
-static void
-xpc_process_msg_chctl_flags_sn2(struct xpc_partition *part, int ch_number)
-{
-	struct xpc_channel *ch = &part->channels[ch_number];
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	int npayloads_sent;
-
-	ch_sn2->remote_GP = part->sn.sn2.remote_GPs[ch_number];
-
-	/* See what, if anything, has changed for each connected channel */
-
-	xpc_msgqueue_ref(ch);
-
-	if (ch_sn2->w_remote_GP.get == ch_sn2->remote_GP.get &&
-	    ch_sn2->w_remote_GP.put == ch_sn2->remote_GP.put) {
-		/* nothing changed since GPs were last pulled */
-		xpc_msgqueue_deref(ch);
-		return;
-	}
-
-	if (!(ch->flags & XPC_C_CONNECTED)) {
-		xpc_msgqueue_deref(ch);
-		return;
-	}
-
-	/*
-	 * First check to see if messages recently sent by us have been
-	 * received by the other side. (The remote GET value will have
-	 * changed since we last looked at it.)
-	 */
-
-	if (ch_sn2->w_remote_GP.get != ch_sn2->remote_GP.get) {
-
-		/*
-		 * We need to notify any senders that want to be notified
-		 * that their sent messages have been received by their
-		 * intended recipients. We need to do this before updating
-		 * w_remote_GP.get so that we don't allocate the same message
-		 * queue entries prematurely (see xpc_allocate_msg()).
-		 */
-		if (atomic_read(&ch->n_to_notify) > 0) {
-			/*
-			 * Notify senders that messages sent have been
-			 * received and delivered by the other side.
-			 */
-			xpc_notify_senders_sn2(ch, xpMsgDelivered,
-					       ch_sn2->remote_GP.get);
-		}
-
-		/*
-		 * Clear msg->flags in previously sent messages, so that
-		 * they're ready for xpc_allocate_msg().
-		 */
-		xpc_clear_local_msgqueue_flags_sn2(ch);
-
-		ch_sn2->w_remote_GP.get = ch_sn2->remote_GP.get;
-
-		dev_dbg(xpc_chan, "w_remote_GP.get changed to %lld, partid=%d, "
-			"channel=%d\n", ch_sn2->w_remote_GP.get, ch->partid,
-			ch->number);
-
-		/*
-		 * If anyone was waiting for message queue entries to become
-		 * available, wake them up.
-		 */
-		if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
-			wake_up(&ch->msg_allocate_wq);
-	}
-
-	/*
-	 * Now check for newly sent messages by the other side. (The remote
-	 * PUT value will have changed since we last looked at it.)
-	 */
-
-	if (ch_sn2->w_remote_GP.put != ch_sn2->remote_GP.put) {
-		/*
-		 * Clear msg->flags in previously received messages, so that
-		 * they're ready for xpc_get_deliverable_payload_sn2().
-		 */
-		xpc_clear_remote_msgqueue_flags_sn2(ch);
-
-		smp_wmb(); /* ensure flags have been cleared before bte_copy */
-		ch_sn2->w_remote_GP.put = ch_sn2->remote_GP.put;
-
-		dev_dbg(xpc_chan, "w_remote_GP.put changed to %lld, partid=%d, "
-			"channel=%d\n", ch_sn2->w_remote_GP.put, ch->partid,
-			ch->number);
-
-		npayloads_sent = xpc_n_of_deliverable_payloads_sn2(ch);
-		if (npayloads_sent > 0) {
-			dev_dbg(xpc_chan, "msgs waiting to be copied and "
-				"delivered=%d, partid=%d, channel=%d\n",
-				npayloads_sent, ch->partid, ch->number);
-
-			if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)
-				xpc_activate_kthreads(ch, npayloads_sent);
-		}
-	}
-
-	xpc_msgqueue_deref(ch);
-}
-
-static struct xpc_msg_sn2 *
-xpc_pull_remote_msg_sn2(struct xpc_channel *ch, s64 get)
-{
-	struct xpc_partition *part = &xpc_partitions[ch->partid];
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	unsigned long remote_msg_pa;
-	struct xpc_msg_sn2 *msg;
-	u32 msg_index;
-	u32 nmsgs;
-	u64 msg_offset;
-	enum xp_retval ret;
-
-	if (mutex_lock_interruptible(&ch_sn2->msg_to_pull_mutex) != 0) {
-		/* we were interrupted by a signal */
-		return NULL;
-	}
-
-	while (get >= ch_sn2->next_msg_to_pull) {
-
-		/* pull as many messages as are ready and able to be pulled */
-
-		msg_index = ch_sn2->next_msg_to_pull % ch->remote_nentries;
-
-		DBUG_ON(ch_sn2->next_msg_to_pull >= ch_sn2->w_remote_GP.put);
-		nmsgs = ch_sn2->w_remote_GP.put - ch_sn2->next_msg_to_pull;
-		if (msg_index + nmsgs > ch->remote_nentries) {
-			/* ignore the ones that wrap the msg queue for now */
-			nmsgs = ch->remote_nentries - msg_index;
-		}
-
-		msg_offset = msg_index * ch->entry_size;
-		msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue +
-		    msg_offset);
-		remote_msg_pa = ch_sn2->remote_msgqueue_pa + msg_offset;
-
-		ret = xpc_pull_remote_cachelines_sn2(part, msg, remote_msg_pa,
-						     nmsgs * ch->entry_size);
-		if (ret != xpSuccess) {
-
-			dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
-				" msg %lld from partition %d, channel=%d, "
-				"ret=%d\n", nmsgs, ch_sn2->next_msg_to_pull,
-				ch->partid, ch->number, ret);
-
-			XPC_DEACTIVATE_PARTITION(part, ret);
-
-			mutex_unlock(&ch_sn2->msg_to_pull_mutex);
-			return NULL;
-		}
-
-		ch_sn2->next_msg_to_pull += nmsgs;
-	}
-
-	mutex_unlock(&ch_sn2->msg_to_pull_mutex);
-
-	/* return the message we were looking for */
-	msg_offset = (get % ch->remote_nentries) * ch->entry_size;
-	msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue + msg_offset);
-
-	return msg;
-}
-
-/*
- * Get the next deliverable message's payload.
- */
-static void *
-xpc_get_deliverable_payload_sn2(struct xpc_channel *ch)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	struct xpc_msg_sn2 *msg;
-	void *payload = NULL;
-	s64 get;
-
-	do {
-		if (ch->flags & XPC_C_DISCONNECTING)
-			break;
-
-		get = ch_sn2->w_local_GP.get;
-		smp_rmb();	/* guarantee that .get loads before .put */
-		if (get == ch_sn2->w_remote_GP.put)
-			break;
-
-		/* There are messages waiting to be pulled and delivered.
-		 * We need to try to secure one for ourselves. We'll do this
-		 * by trying to increment w_local_GP.get and hope that no one
-		 * else beats us to it. If they do, we'll we'll simply have
-		 * to try again for the next one.
-		 */
-
-		if (cmpxchg(&ch_sn2->w_local_GP.get, get, get + 1) == get) {
-			/* we got the entry referenced by get */
-
-			dev_dbg(xpc_chan, "w_local_GP.get changed to %lld, "
-				"partid=%d, channel=%d\n", get + 1,
-				ch->partid, ch->number);
-
-			/* pull the message from the remote partition */
-
-			msg = xpc_pull_remote_msg_sn2(ch, get);
-
-			if (msg != NULL) {
-				DBUG_ON(msg->number != get);
-				DBUG_ON(msg->flags & XPC_M_SN2_DONE);
-				DBUG_ON(!(msg->flags & XPC_M_SN2_READY));
-
-				payload = &msg->payload;
-			}
-			break;
-		}
-
-	} while (1);
-
-	return payload;
-}
-
-/*
- * Now we actually send the messages that are ready to be sent by advancing
- * the local message queue's Put value and then send a chctl msgrequest to the
- * recipient partition.
- */
-static void
-xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	struct xpc_msg_sn2 *msg;
-	s64 put = initial_put + 1;
-	int send_msgrequest = 0;
-
-	while (1) {
-
-		while (1) {
-			if (put == ch_sn2->w_local_GP.put)
-				break;
-
-			msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->
-						     local_msgqueue + (put %
-						     ch->local_nentries) *
-						     ch->entry_size);
-
-			if (!(msg->flags & XPC_M_SN2_READY))
-				break;
-
-			put++;
-		}
-
-		if (put == initial_put) {
-			/* nothing's changed */
-			break;
-		}
-
-		if (cmpxchg_rel(&ch_sn2->local_GP->put, initial_put, put) !=
-		    initial_put) {
-			/* someone else beat us to it */
-			DBUG_ON(ch_sn2->local_GP->put < initial_put);
-			break;
-		}
-
-		/* we just set the new value of local_GP->put */
-
-		dev_dbg(xpc_chan, "local_GP->put changed to %lld, partid=%d, "
-			"channel=%d\n", put, ch->partid, ch->number);
-
-		send_msgrequest = 1;
-
-		/*
-		 * We need to ensure that the message referenced by
-		 * local_GP->put is not XPC_M_SN2_READY or that local_GP->put
-		 * equals w_local_GP.put, so we'll go have a look.
-		 */
-		initial_put = put;
-	}
-
-	if (send_msgrequest)
-		xpc_send_chctl_msgrequest_sn2(ch);
-}
-
-/*
- * Allocate an entry for a message from the message queue associated with the
- * specified channel.
- */
-static enum xp_retval
-xpc_allocate_msg_sn2(struct xpc_channel *ch, u32 flags,
-		     struct xpc_msg_sn2 **address_of_msg)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	struct xpc_msg_sn2 *msg;
-	enum xp_retval ret;
-	s64 put;
-
-	/*
-	 * Get the next available message entry from the local message queue.
-	 * If none are available, we'll make sure that we grab the latest
-	 * GP values.
-	 */
-	ret = xpTimeout;
-
-	while (1) {
-
-		put = ch_sn2->w_local_GP.put;
-		smp_rmb();	/* guarantee that .put loads before .get */
-		if (put - ch_sn2->w_remote_GP.get < ch->local_nentries) {
-
-			/* There are available message entries. We need to try
-			 * to secure one for ourselves. We'll do this by trying
-			 * to increment w_local_GP.put as long as someone else
-			 * doesn't beat us to it. If they do, we'll have to
-			 * try again.
-			 */
-			if (cmpxchg(&ch_sn2->w_local_GP.put, put, put + 1) ==
-			    put) {
-				/* we got the entry referenced by put */
-				break;
-			}
-			continue;	/* try again */
-		}
-
-		/*
-		 * There aren't any available msg entries at this time.
-		 *
-		 * In waiting for a message entry to become available,
-		 * we set a timeout in case the other side is not sending
-		 * completion interrupts. This lets us fake a notify IRQ
-		 * that will cause the notify IRQ handler to fetch the latest
-		 * GP values as if an interrupt was sent by the other side.
-		 */
-		if (ret == xpTimeout)
-			xpc_send_chctl_local_msgrequest_sn2(ch);
-
-		if (flags & XPC_NOWAIT)
-			return xpNoWait;
-
-		ret = xpc_allocate_msg_wait(ch);
-		if (ret != xpInterrupted && ret != xpTimeout)
-			return ret;
-	}
-
-	/* get the message's address and initialize it */
-	msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->local_msgqueue +
-				     (put % ch->local_nentries) *
-				     ch->entry_size);
-
-	DBUG_ON(msg->flags != 0);
-	msg->number = put;
-
-	dev_dbg(xpc_chan, "w_local_GP.put changed to %lld; msg=0x%p, "
-		"msg_number=%lld, partid=%d, channel=%d\n", put + 1,
-		(void *)msg, msg->number, ch->partid, ch->number);
-
-	*address_of_msg = msg;
-	return xpSuccess;
-}
-
-/*
- * Common code that does the actual sending of the message by advancing the
- * local message queue's Put value and sends a chctl msgrequest to the
- * partition the message is being sent to.
- */
-static enum xp_retval
-xpc_send_payload_sn2(struct xpc_channel *ch, u32 flags, void *payload,
-		     u16 payload_size, u8 notify_type, xpc_notify_func func,
-		     void *key)
-{
-	enum xp_retval ret = xpSuccess;
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	struct xpc_msg_sn2 *msg = msg;
-	struct xpc_notify_sn2 *notify = notify;
-	s64 msg_number;
-	s64 put;
-
-	DBUG_ON(notify_type == XPC_N_CALL && func == NULL);
-
-	if (XPC_MSG_SIZE(payload_size) > ch->entry_size)
-		return xpPayloadTooBig;
-
-	xpc_msgqueue_ref(ch);
-
-	if (ch->flags & XPC_C_DISCONNECTING) {
-		ret = ch->reason;
-		goto out_1;
-	}
-	if (!(ch->flags & XPC_C_CONNECTED)) {
-		ret = xpNotConnected;
-		goto out_1;
-	}
-
-	ret = xpc_allocate_msg_sn2(ch, flags, &msg);
-	if (ret != xpSuccess)
-		goto out_1;
-
-	msg_number = msg->number;
-
-	if (notify_type != 0) {
-		/*
-		 * Tell the remote side to send an ACK interrupt when the
-		 * message has been delivered.
-		 */
-		msg->flags |= XPC_M_SN2_INTERRUPT;
-
-		atomic_inc(&ch->n_to_notify);
-
-		notify = &ch_sn2->notify_queue[msg_number % ch->local_nentries];
-		notify->func = func;
-		notify->key = key;
-		notify->type = notify_type;
-
-		/* ??? Is a mb() needed here? */
-
-		if (ch->flags & XPC_C_DISCONNECTING) {
-			/*
-			 * An error occurred between our last error check and
-			 * this one. We will try to clear the type field from
-			 * the notify entry. If we succeed then
-			 * xpc_disconnect_channel() didn't already process
-			 * the notify entry.
-			 */
-			if (cmpxchg(&notify->type, notify_type, 0) ==
-			    notify_type) {
-				atomic_dec(&ch->n_to_notify);
-				ret = ch->reason;
-			}
-			goto out_1;
-		}
-	}
-
-	memcpy(&msg->payload, payload, payload_size);
-
-	msg->flags |= XPC_M_SN2_READY;
-
-	/*
-	 * The preceding store of msg->flags must occur before the following
-	 * load of local_GP->put.
-	 */
-	smp_mb();
-
-	/* see if the message is next in line to be sent, if so send it */
-
-	put = ch_sn2->local_GP->put;
-	if (put == msg_number)
-		xpc_send_msgs_sn2(ch, put);
-
-out_1:
-	xpc_msgqueue_deref(ch);
-	return ret;
-}
-
-/*
- * Now we actually acknowledge the messages that have been delivered and ack'd
- * by advancing the cached remote message queue's Get value and if requested
- * send a chctl msgrequest to the message sender's partition.
- *
- * If a message has XPC_M_SN2_INTERRUPT set, send an interrupt to the partition
- * that sent the message.
- */
-static void
-xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
-{
-	struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
-	struct xpc_msg_sn2 *msg;
-	s64 get = initial_get + 1;
-	int send_msgrequest = 0;
-
-	while (1) {
-
-		while (1) {
-			if (get == ch_sn2->w_local_GP.get)
-				break;
-
-			msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->
-						     remote_msgqueue + (get %
-						     ch->remote_nentries) *
-						     ch->entry_size);
-
-			if (!(msg->flags & XPC_M_SN2_DONE))
-				break;
-
-			msg_flags |= msg->flags;
-			get++;
-		}
-
-		if (get == initial_get) {
-			/* nothing's changed */
-			break;
-		}
-
-		if (cmpxchg_rel(&ch_sn2->local_GP->get, initial_get, get) !=
-		    initial_get) {
-			/* someone else beat us to it */
-			DBUG_ON(ch_sn2->local_GP->get <= initial_get);
-			break;
-		}
-
-		/* we just set the new value of local_GP->get */
-
-		dev_dbg(xpc_chan, "local_GP->get changed to %lld, partid=%d, "
-			"channel=%d\n", get, ch->partid, ch->number);
-
-		send_msgrequest = (msg_flags & XPC_M_SN2_INTERRUPT);
-
-		/*
-		 * We need to ensure that the message referenced by
-		 * local_GP->get is not XPC_M_SN2_DONE or that local_GP->get
-		 * equals w_local_GP.get, so we'll go have a look.
-		 */
-		initial_get = get;
-	}
-
-	if (send_msgrequest)
-		xpc_send_chctl_msgrequest_sn2(ch);
-}
-
-static void
-xpc_received_payload_sn2(struct xpc_channel *ch, void *payload)
-{
-	struct xpc_msg_sn2 *msg;
-	s64 msg_number;
-	s64 get;
-
-	msg = container_of(payload, struct xpc_msg_sn2, payload);
-	msg_number = msg->number;
-
-	dev_dbg(xpc_chan, "msg=0x%p, msg_number=%lld, partid=%d, channel=%d\n",
-		(void *)msg, msg_number, ch->partid, ch->number);
-
-	DBUG_ON((((u64)msg - (u64)ch->sn.sn2.remote_msgqueue) / ch->entry_size) !=
-		msg_number % ch->remote_nentries);
-	DBUG_ON(!(msg->flags & XPC_M_SN2_READY));
-	DBUG_ON(msg->flags & XPC_M_SN2_DONE);
-
-	msg->flags |= XPC_M_SN2_DONE;
-
-	/*
-	 * The preceding store of msg->flags must occur before the following
-	 * load of local_GP->get.
-	 */
-	smp_mb();
-
-	/*
-	 * See if this message is next in line to be acknowledged as having
-	 * been delivered.
-	 */
-	get = ch->sn.sn2.local_GP->get;
-	if (get == msg_number)
-		xpc_acknowledge_msgs_sn2(ch, get, msg->flags);
-}
-
-static struct xpc_arch_operations xpc_arch_ops_sn2 = {
-	.setup_partitions = xpc_setup_partitions_sn2,
-	.teardown_partitions = xpc_teardown_partitions_sn2,
-	.process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_sn2,
-	.get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_sn2,
-	.setup_rsvd_page = xpc_setup_rsvd_page_sn2,
-
-	.allow_hb = xpc_allow_hb_sn2,
-	.disallow_hb = xpc_disallow_hb_sn2,
-	.disallow_all_hbs = xpc_disallow_all_hbs_sn2,
-	.increment_heartbeat = xpc_increment_heartbeat_sn2,
-	.offline_heartbeat = xpc_offline_heartbeat_sn2,
-	.online_heartbeat = xpc_online_heartbeat_sn2,
-	.heartbeat_init = xpc_heartbeat_init_sn2,
-	.heartbeat_exit = xpc_heartbeat_exit_sn2,
-	.get_remote_heartbeat = xpc_get_remote_heartbeat_sn2,
-
-	.request_partition_activation =
-		xpc_request_partition_activation_sn2,
-	.request_partition_reactivation =
-		xpc_request_partition_reactivation_sn2,
-	.request_partition_deactivation =
-		xpc_request_partition_deactivation_sn2,
-	.cancel_partition_deactivation_request =
-		xpc_cancel_partition_deactivation_request_sn2,
-
-	.setup_ch_structures = xpc_setup_ch_structures_sn2,
-	.teardown_ch_structures = xpc_teardown_ch_structures_sn2,
-
-	.make_first_contact = xpc_make_first_contact_sn2,
-
-	.get_chctl_all_flags = xpc_get_chctl_all_flags_sn2,
-	.send_chctl_closerequest = xpc_send_chctl_closerequest_sn2,
-	.send_chctl_closereply = xpc_send_chctl_closereply_sn2,
-	.send_chctl_openrequest = xpc_send_chctl_openrequest_sn2,
-	.send_chctl_openreply = xpc_send_chctl_openreply_sn2,
-	.send_chctl_opencomplete = xpc_send_chctl_opencomplete_sn2,
-	.process_msg_chctl_flags = xpc_process_msg_chctl_flags_sn2,
-
-	.save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_sn2,
-
-	.setup_msg_structures = xpc_setup_msg_structures_sn2,
-	.teardown_msg_structures = xpc_teardown_msg_structures_sn2,
-
-	.indicate_partition_engaged = xpc_indicate_partition_engaged_sn2,
-	.indicate_partition_disengaged = xpc_indicate_partition_disengaged_sn2,
-	.partition_engaged = xpc_partition_engaged_sn2,
-	.any_partition_engaged = xpc_any_partition_engaged_sn2,
-	.assume_partition_disengaged = xpc_assume_partition_disengaged_sn2,
-
-	.n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_sn2,
-	.send_payload = xpc_send_payload_sn2,
-	.get_deliverable_payload = xpc_get_deliverable_payload_sn2,
-	.received_payload = xpc_received_payload_sn2,
-	.notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_sn2,
-};
-
-int
-xpc_init_sn2(void)
-{
-	int ret;
-	size_t buf_size;
-
-	xpc_arch_ops = xpc_arch_ops_sn2;
-
-	if (offsetof(struct xpc_msg_sn2, payload) > XPC_MSG_HDR_MAX_SIZE) {
-		dev_err(xpc_part, "header portion of struct xpc_msg_sn2 is "
-			"larger than %d\n", XPC_MSG_HDR_MAX_SIZE);
-		return -E2BIG;
-	}
-
-	buf_size = max(XPC_RP_VARS_SIZE,
-		       XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES_SN2);
-	xpc_remote_copy_buffer_sn2 = xpc_kmalloc_cacheline_aligned(buf_size,
-								   GFP_KERNEL,
-					      &xpc_remote_copy_buffer_base_sn2);
-	if (xpc_remote_copy_buffer_sn2 == NULL) {
-		dev_err(xpc_part, "can't get memory for remote copy buffer\n");
-		return -ENOMEM;
-	}
-
-	/* open up protections for IPI and [potentially] amo operations */
-	xpc_allow_IPI_ops_sn2();
-	xpc_allow_amo_ops_shub_wars_1_1_sn2();
-
-	/*
-	 * This is safe to do before the xpc_hb_checker thread has started
-	 * because the handler releases a wait queue.  If an interrupt is
-	 * received before the thread is waiting, it will not go to sleep,
-	 * but rather immediately process the interrupt.
-	 */
-	ret = request_irq(SGI_XPC_ACTIVATE, xpc_handle_activate_IRQ_sn2, 0,
-			  "xpc hb", NULL);
-	if (ret != 0) {
-		dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
-			"errno=%d\n", -ret);
-		xpc_disallow_IPI_ops_sn2();
-		kfree(xpc_remote_copy_buffer_base_sn2);
-	}
-	return ret;
-}
-
-void
-xpc_exit_sn2(void)
-{
-	free_irq(SGI_XPC_ACTIVATE, NULL);
-	xpc_disallow_IPI_ops_sn2();
-	kfree(xpc_remote_copy_buffer_base_sn2);
-}
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c
index 0c6de97dd347..09e24659ef3d 100644
--- a/drivers/misc/sgi-xp/xpc_uv.c
+++ b/drivers/misc/sgi-xp/xpc_uv.c
@@ -27,7 +27,7 @@
 #if defined CONFIG_X86_64
 #include <asm/uv/bios.h>
 #include <asm/uv/uv_irq.h>
-#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#elif defined CONFIG_IA64_SGI_UV
 #include <asm/sn/intr.h>
 #include <asm/sn/sn_sal.h>
 #endif
@@ -35,7 +35,7 @@
 #include "../sgi-gru/grukservices.h"
 #include "xpc.h"
 
-#if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#if defined CONFIG_IA64_SGI_UV
 struct uv_IO_APIC_route_entry {
 	__u64	vector		:  8,
 		delivery_mode	:  3,
@@ -48,6 +48,8 @@ struct uv_IO_APIC_route_entry {
 		__reserved_2	: 15,
 		dest		: 32;
 };
+
+#define sn_partition_id 0
 #endif
 
 static struct xpc_heartbeat_uv *xpc_heartbeat_uv;
@@ -119,7 +121,7 @@ xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name)
 
 	mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset);
 
-#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#elif defined CONFIG_IA64_SGI_UV
 	if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0)
 		mq->irq = SGI_XPC_ACTIVATE;
 	else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0)
@@ -142,7 +144,7 @@ xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq)
 #if defined CONFIG_X86_64
 	uv_teardown_irq(mq->irq);
 
-#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#elif defined CONFIG_IA64_SGI_UV
 	int mmr_pnode;
 	unsigned long mmr_value;
 
@@ -160,7 +162,7 @@ xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq)
 {
 	int ret;
 
-#if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#if defined CONFIG_IA64_SGI_UV
 	int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
 
 	ret = sn_mq_watchlist_alloc(mmr_pnode, (void *)uv_gpa(mq->address),
@@ -195,7 +197,7 @@ xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq)
 #if defined CONFIG_X86_64
 	ret = uv_bios_mq_watchlist_free(mmr_pnode, mq->watchlist_num);
 	BUG_ON(ret != BIOS_STATUS_SUCCESS);
-#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#elif defined CONFIG_IA64_SGI_UV
 	ret = sn_mq_watchlist_free(mmr_pnode, mq->watchlist_num);
 	BUG_ON(ret != SALRET_OK);
 #else
@@ -794,7 +796,7 @@ xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
 	else
 		ret = xpBiosError;
 
-#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#elif defined CONFIG_IA64_SGI_UV
 	status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len);
 	if (status == SALRET_OK)
 		ret = xpSuccess;
diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c
index 44d750d98bc8..f7d610a22347 100644
--- a/drivers/misc/sgi-xp/xpnet.c
+++ b/drivers/misc/sgi-xp/xpnet.c
@@ -515,7 +515,7 @@ xpnet_init(void)
 {
 	int result;
 
-	if (!is_shub() && !is_uv())
+	if (!is_uv())
 		return -ENODEV;
 
 	dev_info(xpnet, "registering network device %s\n", XPNET_DEVICE_NAME);
diff --git a/drivers/pci/hotplug/Kconfig b/drivers/pci/hotplug/Kconfig
index e9f78eb390d2..e7b493c22bf3 100644
--- a/drivers/pci/hotplug/Kconfig
+++ b/drivers/pci/hotplug/Kconfig
@@ -147,15 +147,6 @@ config HOTPLUG_PCI_RPA_DLPAR
 
 	  When in doubt, say N.
 
-config HOTPLUG_PCI_SGI
-	tristate "SGI PCI Hotplug Support"
-	depends on IA64_SGI_SN2 || IA64_GENERIC
-	help
-	  Say Y here if you want to use the SGI Altix Hotplug
-	  Driver for PCI devices.
-
-	  When in doubt, say N.
-
 config HOTPLUG_PCI_S390
 	bool "System z PCI Hotplug Support"
 	depends on S390 && 64BIT
diff --git a/drivers/pci/hotplug/Makefile b/drivers/pci/hotplug/Makefile
index 7e3331603714..5196983220df 100644
--- a/drivers/pci/hotplug/Makefile
+++ b/drivers/pci/hotplug/Makefile
@@ -18,7 +18,6 @@ obj-$(CONFIG_HOTPLUG_PCI_SHPC)		+= shpchp.o
 obj-$(CONFIG_HOTPLUG_PCI_POWERNV)	+= pnv-php.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA)		+= rpaphp.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR)	+= rpadlpar_io.o
-obj-$(CONFIG_HOTPLUG_PCI_SGI)		+= sgi_hotplug.o
 obj-$(CONFIG_HOTPLUG_PCI_ACPI)		+= acpiphp.o
 obj-$(CONFIG_HOTPLUG_PCI_S390)		+= s390_pci_hpc.o
 
diff --git a/drivers/pci/hotplug/sgi_hotplug.c b/drivers/pci/hotplug/sgi_hotplug.c
deleted file mode 100644
index 231f5bdd3d2d..000000000000
--- a/drivers/pci/hotplug/sgi_hotplug.c
+++ /dev/null
@@ -1,700 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2005-2006 Silicon Graphics, Inc. All rights reserved.
- *
- * This work was based on the 2.4/2.6 kernel development by Dick Reigner.
- * Work to add BIOS PROM support was completed by Mike Habeck.
- */
-
-#include <linux/acpi.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/pci_hotplug.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/mutex.h>
-
-#include <asm/sn/addrs.h>
-#include <asm/sn/geo.h>
-#include <asm/sn/l1.h>
-#include <asm/sn/module.h>
-#include <asm/sn/pcibr_provider.h>
-#include <asm/sn/pcibus_provider_defs.h>
-#include <asm/sn/pcidev.h>
-#include <asm/sn/sn_feature_sets.h>
-#include <asm/sn/sn_sal.h>
-#include <asm/sn/types.h>
-#include <asm/sn/acpi.h>
-
-#include "../pci.h"
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("SGI (prarit@sgi.com, dickie@sgi.com, habeck@sgi.com)");
-MODULE_DESCRIPTION("SGI Altix Hot Plug PCI Controller Driver");
-
-
-/* SAL call error codes. Keep in sync with prom header io/include/pcibr.h */
-#define PCI_SLOT_ALREADY_UP		2	/* slot already up */
-#define PCI_SLOT_ALREADY_DOWN		3	/* slot already down */
-#define PCI_L1_ERR			7	/* L1 console command error */
-#define PCI_EMPTY_33MHZ			15	/* empty 33 MHz bus */
-
-
-#define PCIIO_ASIC_TYPE_TIOCA		4
-#define PCI_L1_QSIZE			128	/* our L1 message buffer size */
-#define SN_MAX_HP_SLOTS			32	/* max hotplug slots */
-#define SN_SLOT_NAME_SIZE		33	/* size of name string */
-
-/* internal list head */
-static struct list_head sn_hp_list;
-
-/* hotplug_slot struct's private pointer */
-struct slot {
-	int device_num;
-	struct pci_bus *pci_bus;
-	/* this struct for glue internal only */
-	struct hotplug_slot hotplug_slot;
-	struct list_head hp_list;
-	char physical_path[SN_SLOT_NAME_SIZE];
-};
-
-struct pcibr_slot_enable_resp {
-	int resp_sub_errno;
-	char resp_l1_msg[PCI_L1_QSIZE + 1];
-};
-
-struct pcibr_slot_disable_resp {
-	int resp_sub_errno;
-	char resp_l1_msg[PCI_L1_QSIZE + 1];
-};
-
-enum sn_pci_req_e {
-	PCI_REQ_SLOT_ELIGIBLE,
-	PCI_REQ_SLOT_DISABLE
-};
-
-static int enable_slot(struct hotplug_slot *slot);
-static int disable_slot(struct hotplug_slot *slot);
-static inline int get_power_status(struct hotplug_slot *slot, u8 *value);
-
-static const struct hotplug_slot_ops sn_hotplug_slot_ops = {
-	.enable_slot            = enable_slot,
-	.disable_slot           = disable_slot,
-	.get_power_status       = get_power_status,
-};
-
-static DEFINE_MUTEX(sn_hotplug_mutex);
-
-static struct slot *to_slot(struct hotplug_slot *bss_hotplug_slot)
-{
-	return container_of(bss_hotplug_slot, struct slot, hotplug_slot);
-}
-
-static ssize_t path_show(struct pci_slot *pci_slot, char *buf)
-{
-	int retval = -ENOENT;
-	struct slot *slot = to_slot(pci_slot->hotplug);
-
-	if (!slot)
-		return retval;
-
-	retval = sprintf(buf, "%s\n", slot->physical_path);
-	return retval;
-}
-
-static struct pci_slot_attribute sn_slot_path_attr = __ATTR_RO(path);
-
-static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device)
-{
-	struct pcibus_info *pcibus_info;
-	u16 busnum, segment, ioboard_type;
-
-	pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
-
-	/* Check to see if this is a valid slot on 'pci_bus' */
-	if (!(pcibus_info->pbi_valid_devices & (1 << device)))
-		return -EPERM;
-
-	ioboard_type = sn_ioboard_to_pci_bus(pci_bus);
-	busnum = pcibus_info->pbi_buscommon.bs_persist_busnum;
-	segment = pci_domain_nr(pci_bus) & 0xf;
-
-	/* Do not allow hotplug operations on base I/O cards */
-	if ((ioboard_type == L1_BRICKTYPE_IX ||
-	     ioboard_type == L1_BRICKTYPE_IA) &&
-	    (segment == 1 && busnum == 0 && device != 1))
-		return -EPERM;
-
-	return 1;
-}
-
-static int sn_pci_bus_valid(struct pci_bus *pci_bus)
-{
-	struct pcibus_info *pcibus_info;
-	u32 asic_type;
-	u16 ioboard_type;
-
-	/* Don't register slots hanging off the TIOCA bus */
-	pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
-	asic_type = pcibus_info->pbi_buscommon.bs_asic_type;
-	if (asic_type == PCIIO_ASIC_TYPE_TIOCA)
-		return -EPERM;
-
-	/* Only register slots in I/O Bricks that support hotplug */
-	ioboard_type = sn_ioboard_to_pci_bus(pci_bus);
-	switch (ioboard_type) {
-		case L1_BRICKTYPE_IX:
-		case L1_BRICKTYPE_PX:
-		case L1_BRICKTYPE_IA:
-		case L1_BRICKTYPE_PA:
-		case L1_BOARDTYPE_PCIX3SLOT:
-			return 1;
-			break;
-		default:
-			return -EPERM;
-			break;
-	}
-
-	return -EIO;
-}
-
-static int sn_hp_slot_private_alloc(struct hotplug_slot **bss_hotplug_slot,
-				    struct pci_bus *pci_bus, int device,
-				    char *name)
-{
-	struct pcibus_info *pcibus_info;
-	struct slot *slot;
-
-	pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
-
-	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
-	if (!slot)
-		return -ENOMEM;
-
-	slot->device_num = device;
-	slot->pci_bus = pci_bus;
-	sprintf(name, "%04x:%02x:%02x",
-		pci_domain_nr(pci_bus),
-		((u16)pcibus_info->pbi_buscommon.bs_persist_busnum),
-		device + 1);
-
-	sn_generate_path(pci_bus, slot->physical_path);
-
-	list_add(&slot->hp_list, &sn_hp_list);
-	*bss_hotplug_slot = &slot->hotplug_slot;
-
-	return 0;
-}
-
-static struct hotplug_slot *sn_hp_destroy(void)
-{
-	struct slot *slot;
-	struct pci_slot *pci_slot;
-	struct hotplug_slot *bss_hotplug_slot = NULL;
-
-	list_for_each_entry(slot, &sn_hp_list, hp_list) {
-		bss_hotplug_slot = &slot->hotplug_slot;
-		pci_slot = bss_hotplug_slot->pci_slot;
-		list_del(&slot->hp_list);
-		sysfs_remove_file(&pci_slot->kobj,
-				  &sn_slot_path_attr.attr);
-		break;
-	}
-	return bss_hotplug_slot;
-}
-
-static void sn_bus_free_data(struct pci_dev *dev)
-{
-	struct pci_bus *subordinate_bus;
-	struct pci_dev *child;
-
-	/* Recursively clean up sn_irq_info structs */
-	if (dev->subordinate) {
-		subordinate_bus = dev->subordinate;
-		list_for_each_entry(child, &subordinate_bus->devices, bus_list)
-			sn_bus_free_data(child);
-	}
-	/*
-	 * Some drivers may use dma accesses during the
-	 * driver remove function. We release the sysdata
-	 * areas after the driver remove functions have
-	 * been called.
-	 */
-	sn_bus_store_sysdata(dev);
-	sn_pci_unfixup_slot(dev);
-}
-
-static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot,
-			  int device_num, char **ssdt)
-{
-	struct slot *slot = to_slot(bss_hotplug_slot);
-	struct pcibus_info *pcibus_info;
-	struct pcibr_slot_enable_resp resp;
-	int rc;
-
-	pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
-
-	/*
-	 * Power-on and initialize the slot in the SN
-	 * PCI infrastructure.
-	 */
-	rc = sal_pcibr_slot_enable(pcibus_info, device_num, &resp, ssdt);
-
-
-	if (rc == PCI_SLOT_ALREADY_UP) {
-		pci_dbg(slot->pci_bus->self, "is already active\n");
-		return 1; /* return 1 to user */
-	}
-
-	if (rc == PCI_L1_ERR) {
-		pci_dbg(slot->pci_bus->self, "L1 failure %d with message: %s",
-			resp.resp_sub_errno, resp.resp_l1_msg);
-		return -EPERM;
-	}
-
-	if (rc) {
-		pci_dbg(slot->pci_bus->self, "insert failed with error %d sub-error %d\n",
-			rc, resp.resp_sub_errno);
-		return -EIO;
-	}
-
-	pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
-	pcibus_info->pbi_enabled_devices |= (1 << device_num);
-
-	return 0;
-}
-
-static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot,
-			   int device_num, int action)
-{
-	struct slot *slot = to_slot(bss_hotplug_slot);
-	struct pcibus_info *pcibus_info;
-	struct pcibr_slot_disable_resp resp;
-	int rc;
-
-	pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
-
-	rc = sal_pcibr_slot_disable(pcibus_info, device_num, action, &resp);
-
-	if ((action == PCI_REQ_SLOT_ELIGIBLE) &&
-	    (rc == PCI_SLOT_ALREADY_DOWN)) {
-		pci_dbg(slot->pci_bus->self, "Slot %s already inactive\n", slot->physical_path);
-		return 1; /* return 1 to user */
-	}
-
-	if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_EMPTY_33MHZ)) {
-		pci_dbg(slot->pci_bus->self, "Cannot remove last 33MHz card\n");
-		return -EPERM;
-	}
-
-	if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_L1_ERR)) {
-		pci_dbg(slot->pci_bus->self, "L1 failure %d with message \n%s\n",
-			resp.resp_sub_errno, resp.resp_l1_msg);
-		return -EPERM;
-	}
-
-	if ((action == PCI_REQ_SLOT_ELIGIBLE) && rc) {
-		pci_dbg(slot->pci_bus->self, "remove failed with error %d sub-error %d\n",
-			rc, resp.resp_sub_errno);
-		return -EIO;
-	}
-
-	if ((action == PCI_REQ_SLOT_ELIGIBLE) && !rc)
-		return 0;
-
-	if ((action == PCI_REQ_SLOT_DISABLE) && !rc) {
-		pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
-		pcibus_info->pbi_enabled_devices &= ~(1 << device_num);
-		pci_dbg(slot->pci_bus->self, "remove successful\n");
-		return 0;
-	}
-
-	if ((action == PCI_REQ_SLOT_DISABLE) && rc) {
-		pci_dbg(slot->pci_bus->self, "remove failed rc = %d\n", rc);
-	}
-
-	return rc;
-}
-
-/*
- * Power up and configure the slot via a SAL call to PROM.
- * Scan slot (and any children), do any platform specific fixup,
- * and find device driver.
- */
-static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
-{
-	struct slot *slot = to_slot(bss_hotplug_slot);
-	struct pci_bus *new_bus = NULL;
-	struct pci_dev *dev;
-	int num_funcs;
-	int new_ppb = 0;
-	int rc;
-	char *ssdt = NULL;
-	void pcibios_fixup_device_resources(struct pci_dev *);
-
-	/* Serialize the Linux PCI infrastructure */
-	mutex_lock(&sn_hotplug_mutex);
-
-	/*
-	 * Power-on and initialize the slot in the SN
-	 * PCI infrastructure. Also, retrieve the ACPI SSDT
-	 * table for the slot (if ACPI capable PROM).
-	 */
-	rc = sn_slot_enable(bss_hotplug_slot, slot->device_num, &ssdt);
-	if (rc) {
-		mutex_unlock(&sn_hotplug_mutex);
-		return rc;
-	}
-
-	if (ssdt)
-		ssdt = __va(ssdt);
-	/* Add the new SSDT for the slot to the ACPI namespace */
-	if (SN_ACPI_BASE_SUPPORT() && ssdt) {
-		acpi_status ret;
-
-		ret = acpi_load_table((struct acpi_table_header *)ssdt);
-		if (ACPI_FAILURE(ret)) {
-			printk(KERN_ERR "%s: acpi_load_table failed (0x%x)\n",
-			       __func__, ret);
-			/* try to continue on */
-		}
-	}
-
-	num_funcs = pci_scan_slot(slot->pci_bus,
-				  PCI_DEVFN(slot->device_num + 1, 0));
-	if (!num_funcs) {
-		pci_dbg(slot->pci_bus->self, "no device in slot\n");
-		mutex_unlock(&sn_hotplug_mutex);
-		return -ENODEV;
-	}
-
-	/*
-	 * Map SN resources for all functions on the card
-	 * to the Linux PCI interface and tell the drivers
-	 * about them.
-	 */
-	list_for_each_entry(dev, &slot->pci_bus->devices, bus_list) {
-		if (PCI_SLOT(dev->devfn) != slot->device_num + 1)
-			continue;
-
-		/* Need to do slot fixup on PPB before fixup of children
-		 * (PPB's pcidev_info needs to be in pcidev_info list
-		 * before child's SN_PCIDEV_INFO() call to setup
-		 * pdi_host_pcidev_info).
-		 */
-		pcibios_fixup_device_resources(dev);
-		if (SN_ACPI_BASE_SUPPORT())
-			sn_acpi_slot_fixup(dev);
-		else
-			sn_io_slot_fixup(dev);
-		if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
-			pci_hp_add_bridge(dev);
-			if (dev->subordinate) {
-				new_bus = dev->subordinate;
-				new_ppb = 1;
-			}
-		}
-	}
-
-	/*
-	 * Add the slot's devices to the ACPI infrastructure */
-	if (SN_ACPI_BASE_SUPPORT() && ssdt) {
-		unsigned long long adr;
-		struct acpi_device *pdevice;
-		acpi_handle phandle;
-		acpi_handle chandle = NULL;
-		acpi_handle rethandle;
-		acpi_status ret;
-
-		phandle = acpi_device_handle(PCI_CONTROLLER(slot->pci_bus)->companion);
-
-		if (acpi_bus_get_device(phandle, &pdevice)) {
-			pci_dbg(slot->pci_bus->self, "no parent device, assuming NULL\n");
-			pdevice = NULL;
-		}
-
-		acpi_scan_lock_acquire();
-		/*
-		 * Walk the rootbus node's immediate children looking for
-		 * the slot's device node(s). There can be more than
-		 * one for multifunction devices.
-		 */
-		for (;;) {
-			rethandle = NULL;
-			ret = acpi_get_next_object(ACPI_TYPE_DEVICE,
-						   phandle, chandle,
-						   &rethandle);
-
-			if (ret == AE_NOT_FOUND || rethandle == NULL)
-				break;
-
-			chandle = rethandle;
-
-			ret = acpi_evaluate_integer(chandle, METHOD_NAME__ADR,
-						    NULL, &adr);
-
-			if (ACPI_SUCCESS(ret) &&
-			    (adr>>16) == (slot->device_num + 1)) {
-
-				ret = acpi_bus_scan(chandle);
-				if (ACPI_FAILURE(ret)) {
-					printk(KERN_ERR "%s: acpi_bus_scan failed (0x%x) for slot %d func %d\n",
-					       __func__, ret, (int)(adr>>16),
-					       (int)(adr&0xffff));
-					/* try to continue on */
-				}
-			}
-		}
-		acpi_scan_lock_release();
-	}
-
-	pci_lock_rescan_remove();
-
-	/* Call the driver for the new device */
-	pci_bus_add_devices(slot->pci_bus);
-	/* Call the drivers for the new devices subordinate to PPB */
-	if (new_ppb)
-		pci_bus_add_devices(new_bus);
-
-	pci_unlock_rescan_remove();
-	mutex_unlock(&sn_hotplug_mutex);
-
-	if (rc == 0)
-		pci_dbg(slot->pci_bus->self, "insert operation successful\n");
-	else
-		pci_dbg(slot->pci_bus->self, "insert operation failed rc = %d\n", rc);
-
-	return rc;
-}
-
-static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
-{
-	struct slot *slot = to_slot(bss_hotplug_slot);
-	struct pci_dev *dev, *temp;
-	int rc;
-	acpi_handle ssdt_hdl = NULL;
-
-	/* Acquire update access to the bus */
-	mutex_lock(&sn_hotplug_mutex);
-
-	/* is it okay to bring this slot down? */
-	rc = sn_slot_disable(bss_hotplug_slot, slot->device_num,
-			     PCI_REQ_SLOT_ELIGIBLE);
-	if (rc)
-		goto leaving;
-
-	/* free the ACPI resources for the slot */
-	if (SN_ACPI_BASE_SUPPORT() &&
-		PCI_CONTROLLER(slot->pci_bus)->companion) {
-		unsigned long long adr;
-		struct acpi_device *device;
-		acpi_handle phandle;
-		acpi_handle chandle = NULL;
-		acpi_handle rethandle;
-		acpi_status ret;
-
-		/* Get the rootbus node pointer */
-		phandle = acpi_device_handle(PCI_CONTROLLER(slot->pci_bus)->companion);
-
-		acpi_scan_lock_acquire();
-		/*
-		 * Walk the rootbus node's immediate children looking for
-		 * the slot's device node(s). There can be more than
-		 * one for multifunction devices.
-		 */
-		for (;;) {
-			rethandle = NULL;
-			ret = acpi_get_next_object(ACPI_TYPE_DEVICE,
-						   phandle, chandle,
-						   &rethandle);
-
-			if (ret == AE_NOT_FOUND || rethandle == NULL)
-				break;
-
-			chandle = rethandle;
-
-			ret = acpi_evaluate_integer(chandle,
-						    METHOD_NAME__ADR,
-						    NULL, &adr);
-			if (ACPI_SUCCESS(ret) &&
-			    (adr>>16) == (slot->device_num + 1)) {
-				/* retain the owner id */
-				ssdt_hdl = chandle;
-
-				ret = acpi_bus_get_device(chandle,
-							  &device);
-				if (ACPI_SUCCESS(ret))
-					acpi_bus_trim(device);
-			}
-		}
-		acpi_scan_lock_release();
-	}
-
-	pci_lock_rescan_remove();
-	/* Free the SN resources assigned to the Linux device.*/
-	list_for_each_entry_safe(dev, temp, &slot->pci_bus->devices, bus_list) {
-		if (PCI_SLOT(dev->devfn) != slot->device_num + 1)
-			continue;
-
-		pci_dev_get(dev);
-		sn_bus_free_data(dev);
-		pci_stop_and_remove_bus_device(dev);
-		pci_dev_put(dev);
-	}
-	pci_unlock_rescan_remove();
-
-	/* Remove the SSDT for the slot from the ACPI namespace */
-	if (SN_ACPI_BASE_SUPPORT() && ssdt_hdl) {
-		acpi_status ret;
-		ret = acpi_unload_parent_table(ssdt_hdl);
-		if (ACPI_FAILURE(ret)) {
-			acpi_handle_err(ssdt_hdl,
-					"%s: acpi_unload_parent_table failed (0x%x)\n",
-					__func__, ret);
-			/* try to continue on */
-		}
-	}
-
-	/* free the collected sysdata pointers */
-	sn_bus_free_sysdata();
-
-	/* Deactivate slot */
-	rc = sn_slot_disable(bss_hotplug_slot, slot->device_num,
-			     PCI_REQ_SLOT_DISABLE);
- leaving:
-	/* Release the bus lock */
-	mutex_unlock(&sn_hotplug_mutex);
-
-	return rc;
-}
-
-static inline int get_power_status(struct hotplug_slot *bss_hotplug_slot,
-				   u8 *value)
-{
-	struct slot *slot = to_slot(bss_hotplug_slot);
-	struct pcibus_info *pcibus_info;
-	u32 power;
-
-	pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
-	mutex_lock(&sn_hotplug_mutex);
-	power = pcibus_info->pbi_enabled_devices & (1 << slot->device_num);
-	*value = power ? 1 : 0;
-	mutex_unlock(&sn_hotplug_mutex);
-	return 0;
-}
-
-static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot)
-{
-	kfree(to_slot(bss_hotplug_slot));
-}
-
-static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
-{
-	int device;
-	struct pci_slot *pci_slot;
-	struct hotplug_slot *bss_hotplug_slot;
-	char name[SN_SLOT_NAME_SIZE];
-	int rc = 0;
-
-	/*
-	 * Currently only four devices are supported,
-	 * in the future there maybe more -- up to 32.
-	 */
-
-	for (device = 0; device < SN_MAX_HP_SLOTS ; device++) {
-		if (sn_pci_slot_valid(pci_bus, device) != 1)
-			continue;
-
-		if (sn_hp_slot_private_alloc(&bss_hotplug_slot,
-					     pci_bus, device, name)) {
-			rc = -ENOMEM;
-			goto alloc_err;
-		}
-		bss_hotplug_slot->ops = &sn_hotplug_slot_ops;
-
-		rc = pci_hp_register(bss_hotplug_slot, pci_bus, device, name);
-		if (rc)
-			goto register_err;
-
-		pci_slot = bss_hotplug_slot->pci_slot;
-		rc = sysfs_create_file(&pci_slot->kobj,
-				       &sn_slot_path_attr.attr);
-		if (rc)
-			goto alloc_err;
-	}
-	pci_dbg(pci_bus->self, "Registered bus with hotplug\n");
-	return rc;
-
-register_err:
-	pci_dbg(pci_bus->self, "bus failed to register with err = %d\n",
-		rc);
-
-	/* destroy THIS element */
-	sn_hp_destroy();
-	sn_release_slot(bss_hotplug_slot);
-
-alloc_err:
-	/* destroy anything else on the list */
-	while ((bss_hotplug_slot = sn_hp_destroy())) {
-		pci_hp_deregister(bss_hotplug_slot);
-		sn_release_slot(bss_hotplug_slot);
-	}
-
-	return rc;
-}
-
-static int __init sn_pci_hotplug_init(void)
-{
-	struct pci_bus *pci_bus = NULL;
-	int rc;
-	int registered = 0;
-
-	if (!sn_prom_feature_available(PRF_HOTPLUG_SUPPORT)) {
-		printk(KERN_ERR "%s: PROM version does not support hotplug.\n",
-		       __func__);
-		return -EPERM;
-	}
-
-	INIT_LIST_HEAD(&sn_hp_list);
-
-	while ((pci_bus = pci_find_next_bus(pci_bus))) {
-		if (!pci_bus->sysdata)
-			continue;
-
-		rc = sn_pci_bus_valid(pci_bus);
-		if (rc != 1) {
-			pci_dbg(pci_bus->self, "not a valid hotplug bus\n");
-			continue;
-		}
-		pci_dbg(pci_bus->self, "valid hotplug bus\n");
-
-		rc = sn_hotplug_slot_register(pci_bus);
-		if (!rc) {
-			registered = 1;
-		} else {
-			registered = 0;
-			break;
-		}
-	}
-
-	return registered == 1 ? 0 : -ENODEV;
-}
-
-static void __exit sn_pci_hotplug_exit(void)
-{
-	struct hotplug_slot *bss_hotplug_slot;
-
-	while ((bss_hotplug_slot = sn_hp_destroy())) {
-		pci_hp_deregister(bss_hotplug_slot);
-		sn_release_slot(bss_hotplug_slot);
-	}
-
-	if (!list_empty(&sn_hp_list))
-		printk(KERN_ERR "%s: internal list is not empty\n", __FILE__);
-}
-
-module_init(sn_pci_hotplug_init);
-module_exit(sn_pci_hotplug_exit);
diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c
index e5760c4a27f0..832af4213046 100644
--- a/drivers/scsi/qla1280.c
+++ b/drivers/scsi/qla1280.c
@@ -357,10 +357,6 @@
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_tcq.h>
 
-#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
-#include <asm/sn/io.h>
-#endif
-
 
 /*
  * Compile time Options:
@@ -380,11 +376,6 @@
 
 #define NVRAM_DELAY()			udelay(500)	/* 2 microseconds */
 
-#if defined(__ia64__) && !defined(ia64_platform_is)
-#define ia64_platform_is(foo)		(!strcmp(x, platform_name))
-#endif
-
-
 #define IS_ISP1040(ha) (ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP1020)
 #define IS_ISP1x40(ha) (ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP1020 || \
 			ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP1240)
@@ -1427,15 +1418,6 @@ qla1280_initialize_adapter(struct scsi_qla_host *ha)
 	ha->flags.reset_active = 0;
 	ha->flags.abort_isp_active = 0;
 
-#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
-	if (ia64_platform_is("sn2")) {
-		printk(KERN_INFO "scsi(%li): Enabling SN2 PCI DMA "
-		       "dual channel lockup workaround\n", ha->host_no);
-		ha->flags.use_pci_vchannel = 1;
-		driver_setup.no_nvram = 1;
-	}
-#endif
-
 	/* TODO: implement support for the 1040 nvram format */
 	if (IS_ISP1040(ha))
 		driver_setup.no_nvram = 1;
@@ -2251,13 +2233,6 @@ qla1280_nvram_config(struct scsi_qla_host *ha)
 	mb[1] = nv->firmware_feature.f.enable_fast_posting;
 	mb[1] |= nv->firmware_feature.f.report_lvd_bus_transition << 1;
 	mb[1] |= nv->firmware_feature.f.disable_synchronous_backoff << 5;
-#if defined(CONFIG_IA64_GENERIC) || defined (CONFIG_IA64_SGI_SN2)
-	if (ia64_platform_is("sn2")) {
-		printk(KERN_INFO "scsi(%li): Enabling SN2 PCI DMA "
-		       "workaround\n", ha->host_no);
-		mb[1] |= nv->firmware_feature.f.unused_9 << 9; /* XXX */
-	}
-#endif
 	status |= qla1280_mailbox_command(ha, BIT_1 | BIT_0, mb);
 
 	/* Retry count and delay. */
@@ -2888,12 +2863,6 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
 				break;
 
 			dma_handle = sg_dma_address(s);
-#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
-			if (ha->flags.use_pci_vchannel)
-				sn_pci_set_vchan(ha->pdev,
-						 (unsigned long *)&dma_handle,
-						 SCSI_BUS_32(cmd));
-#endif
 			*dword_ptr++ =
 				cpu_to_le32(lower_32_bits(dma_handle));
 			*dword_ptr++ =
@@ -2950,12 +2919,6 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
 				if (cnt == 5)
 					break;
 				dma_handle = sg_dma_address(s);
-#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
-				if (ha->flags.use_pci_vchannel)
-					sn_pci_set_vchan(ha->pdev,
-							 (unsigned long *)&dma_handle,
-							 SCSI_BUS_32(cmd));
-#endif
 				*dword_ptr++ =
 					cpu_to_le32(lower_32_bits(dma_handle));
 				*dword_ptr++ =
diff --git a/drivers/scsi/qla1280.h b/drivers/scsi/qla1280.h
index b496206362a9..a1a8aefc7cc3 100644
--- a/drivers/scsi/qla1280.h
+++ b/drivers/scsi/qla1280.h
@@ -1055,9 +1055,6 @@ struct scsi_qla_host {
 		uint32_t reset_active:1;		/* 3 */
 		uint32_t abort_isp_active:1;		/* 4 */
 		uint32_t disable_risc_code_load:1;	/* 5 */
-#ifdef __ia64__
-		uint32_t use_pci_vchannel:1;
-#endif
 	} flags;
 
 	struct nvram nvram;
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index da83034d4759..d4c3baec9172 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -4575,20 +4575,6 @@ qla2x00_nvram_config(scsi_qla_host_t *vha)
 		rval = 1;
 	}
 
-#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
-	/*
-	 * The SN2 does not provide BIOS emulation which means you can't change
-	 * potentially bogus BIOS settings. Force the use of default settings
-	 * for link rate and frame size.  Hope that the rest of the settings
-	 * are valid.
-	 */
-	if (ia64_platform_is("sn2")) {
-		nv->frame_payload_size = 2048;
-		if (IS_QLA23XX(ha))
-			nv->special_options[1] = BIT_7;
-	}
-#endif
-
 	/* Reset Initialization control block */
 	memset(icb, 0, ha->init_cb_size);
 
diff --git a/drivers/sn/Kconfig b/drivers/sn/Kconfig
deleted file mode 100644
index a6c443d31a3c..000000000000
--- a/drivers/sn/Kconfig
+++ /dev/null
@@ -1,22 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Miscellaneous SN-specific devices
-#
-
-menu "SN Devices"
-	depends on SGI_SN
-
-config SGI_IOC3
-	tristate "SGI IOC3 Base IO support"
-	default m
-	---help---
-	This option enables basic support for the SGI IOC3-based Base IO
-	controller card.  This option does not enable any specific
-	functions on such a card, but provides necessary infrastructure
-	for other drivers to utilize.
-
-	If you have an SGI Altix with an IOC3-based
-	I/O controller or a PCI IOC3 serial card say Y.
-	Otherwise say N.
-
-endmenu
diff --git a/drivers/sn/Makefile b/drivers/sn/Makefile
deleted file mode 100644
index f0e809a38b2d..000000000000
--- a/drivers/sn/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the Altix device drivers.
-#
-#
-
-obj-$(CONFIG_SGI_IOC3) += ioc3.o
diff --git a/drivers/sn/ioc3.c b/drivers/sn/ioc3.c
deleted file mode 100644
index 358025af4918..000000000000
--- a/drivers/sn/ioc3.c
+++ /dev/null
@@ -1,844 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * SGI IOC3 master driver and IRQ demuxer
- *
- * Copyright (c) 2005 Stanislaw Skowronek <skylark@linux-mips.org>
- * Heavily based on similar work by:
- *   Brent Casavant <bcasavan@sgi.com> - IOC4 master driver
- *   Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer
- */
-
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/dma-mapping.h>
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
-#include <linux/delay.h>
-#include <linux/ioc3.h>
-#include <linux/rwsem.h>
-#include <linux/slab.h>
-
-#define IOC3_PCI_SIZE 0x100000
-
-static LIST_HEAD(ioc3_devices);
-static int ioc3_counter;
-static DECLARE_RWSEM(ioc3_devices_rwsem);
-
-static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES];
-static struct ioc3_submodule *ioc3_ethernet;
-static DEFINE_RWLOCK(ioc3_submodules_lock);
-
-/* NIC probing code */
-
-#define GPCR_MLAN_EN    0x00200000      /* enable MCR to pin 8 */
-
-static inline unsigned mcr_pack(unsigned pulse, unsigned sample)
-{
-	return (pulse << 10) | (sample << 2);
-}
-
-static int nic_wait(struct ioc3_driver_data *idd)
-{
-	unsigned mcr;
-
-        do {
-                mcr = readl(&idd->vma->mcr);
-        } while (!(mcr & 2));
-
-        return mcr & 1;
-}
-
-static int nic_reset(struct ioc3_driver_data *idd)
-{
-        int presence;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	writel(mcr_pack(500, 65), &idd->vma->mcr);
-	presence = nic_wait(idd);
-	local_irq_restore(flags);
-
-	udelay(500);
-
-        return presence;
-}
-
-static int nic_read_bit(struct ioc3_driver_data *idd)
-{
-	int result;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	writel(mcr_pack(6, 13), &idd->vma->mcr);
-	result = nic_wait(idd);
-	local_irq_restore(flags);
-
-	udelay(500);
-
-	return result;
-}
-
-static void nic_write_bit(struct ioc3_driver_data *idd, int bit)
-{
-	if (bit)
-		writel(mcr_pack(6, 110), &idd->vma->mcr);
-	else
-		writel(mcr_pack(80, 30), &idd->vma->mcr);
-
-	nic_wait(idd);
-}
-
-static unsigned nic_read_byte(struct ioc3_driver_data *idd)
-{
-	unsigned result = 0;
-	int i;
-
-	for (i = 0; i < 8; i++)
-		result = (result >> 1) | (nic_read_bit(idd) << 7);
-
-	return result;
-}
-
-static void nic_write_byte(struct ioc3_driver_data *idd, int byte)
-{
-	int i, bit;
-
-	for (i = 8; i; i--) {
-		bit = byte & 1;
-		byte >>= 1;
-
-		nic_write_bit(idd, bit);
-	}
-}
-
-static unsigned long
-nic_find(struct ioc3_driver_data *idd, int *last, unsigned long addr)
-{
-	int a, b, index, disc;
-
-	nic_reset(idd);
-
-	/* Search ROM.  */
-	nic_write_byte(idd, 0xF0);
-
-	/* Algorithm from ``Book of iButton Standards''.  */
-	for (index = 0, disc = 0; index < 64; index++) {
-		a = nic_read_bit(idd);
-		b = nic_read_bit(idd);
-
-		if (a && b) {
-			printk(KERN_WARNING "IOC3 NIC search failed.\n");
-			*last = 0;
-			return 0;
-		}
-
-		if (!a && !b) {
-			if (index == *last) {
-				addr |= 1UL << index;
-			} else if (index > *last) {
-				addr &= ~(1UL << index);
-				disc = index;
-			} else if ((addr & (1UL << index)) == 0)
-				disc = index;
-			nic_write_bit(idd, (addr>>index)&1);
-			continue;
-		} else {
-			if (a)
-				addr |= 1UL << index;
-			else
-				addr &= ~(1UL << index);
-			nic_write_bit(idd, a);
-			continue;
-		}
-	}
-	*last = disc;
-	return addr;
-}
-
-static void nic_addr(struct ioc3_driver_data *idd, unsigned long addr)
-{
-	int index;
-
-	nic_reset(idd);
-	nic_write_byte(idd, 0xF0);
-	for (index = 0; index < 64; index++) {
-		nic_read_bit(idd);
-		nic_read_bit(idd);
-		nic_write_bit(idd, (addr>>index)&1);
-	}
-}
-
-static void crc16_byte(unsigned int *crc, unsigned char db)
-{
-	int i;
-
-	for(i=0;i<8;i++) {
-		*crc <<= 1;
-		if((db^(*crc>>16)) & 1)
-			*crc ^= 0x8005;
-		db >>= 1;
-	}
-	*crc &= 0xFFFF;
-}
-
-static unsigned int crc16_area(unsigned char *dbs, int size, unsigned int crc)
-{
-	while(size--)
-		crc16_byte(&crc, *(dbs++));
-	return crc;
-}
-
-static void crc8_byte(unsigned int *crc, unsigned char db)
-{
-	int i,f;
-
-	for(i=0;i<8;i++) {
-		f = (*crc ^ db) & 1;
-		*crc >>= 1;
-		db >>= 1;
-		if(f)
-			*crc ^= 0x8c;
-	}
-	*crc &= 0xff;
-}
-
-static unsigned int crc8_addr(unsigned long addr)
-{
-	int i;
-	unsigned int crc = 0x00;
-
-	for(i=0;i<8;i++)
-		crc8_byte(&crc, addr>>(i<<3));
-	return crc;
-}
-
-static void
-read_redir_page(struct ioc3_driver_data *idd, unsigned long addr, int page,
-			unsigned char *redir, unsigned char *data)
-{
-	int loops = 16, i;
-
-	while(redir[page] != 0xFF) {
-		page = redir[page]^0xFF;
-		loops--;
-		if(loops<0) {
-			printk(KERN_ERR "IOC3: NIC circular redirection\n");
-			return;
-		}
-	}
-	loops = 3;
-	while(loops>0) {
-		nic_addr(idd, addr);
-		nic_write_byte(idd, 0xF0);
-		nic_write_byte(idd, (page << 5) & 0xE0);
-		nic_write_byte(idd, (page >> 3) & 0x1F);
-		for(i=0;i<0x20;i++)
-			data[i] = nic_read_byte(idd);
-		if(crc16_area(data, 0x20, 0x0000) == 0x800d)
-			return;
-		loops--;
-	}
-	printk(KERN_ERR "IOC3: CRC error in data page\n");
-	for(i=0;i<0x20;i++)
-		data[i] = 0x00;
-}
-
-static void
-read_redir_map(struct ioc3_driver_data *idd, unsigned long addr,
-					 unsigned char *redir)
-{
-	int i,j,loops = 3,crc_ok;
-	unsigned int crc;
-
-	while(loops>0) {
-		crc_ok = 1;
-		nic_addr(idd, addr);
-		nic_write_byte(idd, 0xAA);
-		nic_write_byte(idd, 0x00);
-		nic_write_byte(idd, 0x01);
-		for(i=0;i<64;i+=8) {
-			for(j=0;j<8;j++)
-				redir[i+j] = nic_read_byte(idd);
-			crc = crc16_area(redir+i, 8, (i==0)?0x8707:0x0000);
-			crc16_byte(&crc, nic_read_byte(idd));
-			crc16_byte(&crc, nic_read_byte(idd));
-			if(crc != 0x800d)
-				crc_ok = 0;
-		}
-		if(crc_ok)
-			return;
-		loops--;
-	}
-	printk(KERN_ERR "IOC3: CRC error in redirection page\n");
-	for(i=0;i<64;i++)
-		redir[i] = 0xFF;
-}
-
-static void read_nic(struct ioc3_driver_data *idd, unsigned long addr)
-{
-	unsigned char redir[64];
-	unsigned char data[64],part[32];
-	int i,j;
-
-	/* read redirections */
-	read_redir_map(idd, addr, redir);
-	/* read data pages */
-	read_redir_page(idd, addr, 0, redir, data);
-	read_redir_page(idd, addr, 1, redir, data+32);
-	/* assemble the part # */
-	j=0;
-	for(i=0;i<19;i++)
-		if(data[i+11] != ' ')
-			part[j++] = data[i+11];
-	for(i=0;i<6;i++)
-		if(data[i+32] != ' ')
-			part[j++] = data[i+32];
-	part[j] = 0;
-	/* skip Octane power supplies */
-	if(!strncmp(part, "060-0035-", 9))
-		return;
-	if(!strncmp(part, "060-0038-", 9))
-		return;
-	strcpy(idd->nic_part, part);
-	/* assemble the serial # */
-	j=0;
-	for(i=0;i<10;i++)
-		if(data[i+1] != ' ')
-			idd->nic_serial[j++] = data[i+1];
-	idd->nic_serial[j] = 0;
-}
-
-static void read_mac(struct ioc3_driver_data *idd, unsigned long addr)
-{
-	int i, loops = 3;
-	unsigned char data[13];
-
-	while(loops>0) {
-		nic_addr(idd, addr);
-		nic_write_byte(idd, 0xF0);
-		nic_write_byte(idd, 0x00);
-		nic_write_byte(idd, 0x00);
-		nic_read_byte(idd);
-		for(i=0;i<13;i++)
-			data[i] = nic_read_byte(idd);
-		if(crc16_area(data, 13, 0x0000) == 0x800d) {
-			for(i=10;i>4;i--)
-				idd->nic_mac[10-i] = data[i];
-			return;
-		}
-		loops--;
-	}
-	printk(KERN_ERR "IOC3: CRC error in MAC address\n");
-	for(i=0;i<6;i++)
-		idd->nic_mac[i] = 0x00;
-}
-
-static void probe_nic(struct ioc3_driver_data *idd)
-{
-        int save = 0, loops = 3;
-        unsigned long first, addr;
-
-        writel(GPCR_MLAN_EN, &idd->vma->gpcr_s);
-
-        while(loops>0) {
-                idd->nic_part[0] = 0;
-                idd->nic_serial[0] = 0;
-                addr = first = nic_find(idd, &save, 0);
-                if(!first)
-                        return;
-                while(1) {
-                        if(crc8_addr(addr))
-                                break;
-                        else {
-                                switch(addr & 0xFF) {
-                                case 0x0B:
-                                        read_nic(idd, addr);
-                                        break;
-                                case 0x09:
-                                case 0x89:
-                                case 0x91:
-                                        read_mac(idd, addr);
-                                        break;
-                                }
-                        }
-                        addr = nic_find(idd, &save, addr);
-                        if(addr == first)
-                                return;
-                }
-                loops--;
-        }
-        printk(KERN_ERR "IOC3: CRC error in NIC address\n");
-}
-
-/* Interrupts */
-
-static void write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&idd->ir_lock, flags);
-	switch (which) {
-	case IOC3_W_IES:
-		writel(val, &idd->vma->sio_ies);
-		break;
-	case IOC3_W_IEC:
-		writel(val, &idd->vma->sio_iec);
-		break;
-	}
-	spin_unlock_irqrestore(&idd->ir_lock, flags);
-}
-static inline uint32_t get_pending_intrs(struct ioc3_driver_data *idd)
-{
-	unsigned long flag;
-	uint32_t intrs = 0;
-
-	spin_lock_irqsave(&idd->ir_lock, flag);
-	intrs = readl(&idd->vma->sio_ir);
-	intrs &= readl(&idd->vma->sio_ies);
-	spin_unlock_irqrestore(&idd->ir_lock, flag);
-	return intrs;
-}
-
-static irqreturn_t ioc3_intr_io(int irq, void *arg)
-{
-	unsigned long flags;
-	struct ioc3_driver_data *idd = arg;
-	int handled = 1, id;
-	unsigned int pending;
-
-	read_lock_irqsave(&ioc3_submodules_lock, flags);
-
-	if(idd->dual_irq && readb(&idd->vma->eisr)) {
-		/* send Ethernet IRQ to the driver */
-		if(ioc3_ethernet && idd->active[ioc3_ethernet->id] &&
-						ioc3_ethernet->intr) {
-			handled = handled && !ioc3_ethernet->intr(ioc3_ethernet,
-							idd, 0);
-		}
-	}
-	pending = get_pending_intrs(idd);	/* look at the IO IRQs */
-
-	for(id=0;id<IOC3_MAX_SUBMODULES;id++) {
-		if(idd->active[id] && ioc3_submodules[id]
-				&& (pending & ioc3_submodules[id]->irq_mask)
-				&& ioc3_submodules[id]->intr) {
-			write_ireg(idd, ioc3_submodules[id]->irq_mask,
-							IOC3_W_IEC);
-			if(!ioc3_submodules[id]->intr(ioc3_submodules[id],
-				   idd, pending & ioc3_submodules[id]->irq_mask))
-				pending &= ~ioc3_submodules[id]->irq_mask;
-			if (ioc3_submodules[id]->reset_mask)
-				write_ireg(idd, ioc3_submodules[id]->irq_mask,
-							IOC3_W_IES);
-		}
-	}
-	read_unlock_irqrestore(&ioc3_submodules_lock, flags);
-	if(pending) {
-		printk(KERN_WARNING
-		  "IOC3: Pending IRQs 0x%08x discarded and disabled\n",pending);
-		write_ireg(idd, pending, IOC3_W_IEC);
-		handled = 1;
-	}
-	return handled?IRQ_HANDLED:IRQ_NONE;
-}
-
-static irqreturn_t ioc3_intr_eth(int irq, void *arg)
-{
-	unsigned long flags;
-	struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
-	int handled = 1;
-
-	if(!idd->dual_irq)
-		return IRQ_NONE;
-	read_lock_irqsave(&ioc3_submodules_lock, flags);
-	if(ioc3_ethernet && idd->active[ioc3_ethernet->id]
-				&& ioc3_ethernet->intr)
-		handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, idd, 0);
-	read_unlock_irqrestore(&ioc3_submodules_lock, flags);
-	return handled?IRQ_HANDLED:IRQ_NONE;
-}
-
-void ioc3_enable(struct ioc3_submodule *is,
-				struct ioc3_driver_data *idd, unsigned int irqs)
-{
-	write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES);
-}
-
-void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd,
-				unsigned int irqs)
-{
-	writel(irqs & is->irq_mask, &idd->vma->sio_ir);
-}
-
-void ioc3_disable(struct ioc3_submodule *is,
-				struct ioc3_driver_data *idd, unsigned int irqs)
-{
-	write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC);
-}
-
-void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&idd->gpio_lock, flags);
-	writel(val, &idd->vma->gpcr_s);
-	spin_unlock_irqrestore(&idd->gpio_lock, flags);
-}
-
-/* Keep it simple, stupid! */
-static int find_slot(void **tab, int max)
-{
-	int i;
-	for(i=0;i<max;i++)
-		if(!(tab[i]))
-			return i;
-	return -1;
-}
-
-/* Register an IOC3 submodule */
-int ioc3_register_submodule(struct ioc3_submodule *is)
-{
-	struct ioc3_driver_data *idd;
-	int alloc_id;
-	unsigned long flags;
-
-	write_lock_irqsave(&ioc3_submodules_lock, flags);
-	alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES);
-	if(alloc_id != -1) {
-		ioc3_submodules[alloc_id] = is;
-		if(is->ethernet) {
-			if(ioc3_ethernet==NULL)
-				ioc3_ethernet=is;
-			else
-				printk(KERN_WARNING
-				  "IOC3 Ethernet module already registered!\n");
-		}
-	}
-	write_unlock_irqrestore(&ioc3_submodules_lock, flags);
-
-	if(alloc_id == -1) {
-		printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n");
-		return -ENOMEM;
-	}
-
-	is->id=alloc_id;
-
-	/* Initialize submodule for each IOC3 */
-	if (!is->probe)
-		return 0;
-
-	down_read(&ioc3_devices_rwsem);
-	list_for_each_entry(idd, &ioc3_devices, list) {
-		/* set to 1 for IRQs in probe */
-		idd->active[alloc_id] = 1;
-		idd->active[alloc_id] = !is->probe(is, idd);
-	}
-	up_read(&ioc3_devices_rwsem);
-
-	return 0;
-}
-
-/* Unregister an IOC3 submodule */
-void ioc3_unregister_submodule(struct ioc3_submodule *is)
-{
-	struct ioc3_driver_data *idd;
-	unsigned long flags;
-
-	write_lock_irqsave(&ioc3_submodules_lock, flags);
-	if(ioc3_submodules[is->id]==is)
-		ioc3_submodules[is->id]=NULL;
-	else
-		printk(KERN_WARNING
-			"IOC3 submodule %s has wrong ID.\n",is->name);
-	if(ioc3_ethernet==is)
-		ioc3_ethernet = NULL;
-	write_unlock_irqrestore(&ioc3_submodules_lock, flags);
-
-	/* Remove submodule for each IOC3 */
-	down_read(&ioc3_devices_rwsem);
-	list_for_each_entry(idd, &ioc3_devices, list)
-		if(idd->active[is->id]) {
-			if(is->remove)
-				if(is->remove(is, idd))
-					printk(KERN_WARNING
-					       "%s: IOC3 submodule %s remove failed "
-					       "for pci_dev %s.\n",
-					       __func__, module_name(is->owner),
-					       pci_name(idd->pdev));
-			idd->active[is->id] = 0;
-			if(is->irq_mask)
-				write_ireg(idd, is->irq_mask, IOC3_W_IEC);
-		}
-	up_read(&ioc3_devices_rwsem);
-}
-
-/*********************
- * Device management *
- *********************/
-
-static char *ioc3_class_names[] = { "unknown", "IP27 BaseIO", "IP30 system",
-			"MENET 1/2/3", "MENET 4", "CADduo", "Altix Serial" };
-
-static int ioc3_class(struct ioc3_driver_data *idd)
-{
-	int res = IOC3_CLASS_NONE;
-	/* NIC-based logic */
-	if(!strncmp(idd->nic_part, "030-0891-", 9))
-		res = IOC3_CLASS_BASE_IP30;
-	if(!strncmp(idd->nic_part, "030-1155-", 9))
-		res = IOC3_CLASS_CADDUO;
-	if(!strncmp(idd->nic_part, "030-1657-", 9))
-		res = IOC3_CLASS_SERIAL;
-	if(!strncmp(idd->nic_part, "030-1664-", 9))
-		res = IOC3_CLASS_SERIAL;
-	/* total random heuristics */
-#ifdef CONFIG_SGI_IP27
-	if(!idd->nic_part[0])
-		res = IOC3_CLASS_BASE_IP27;
-#endif
-	/* print educational message */
-	printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n",
-			idd->nic_part, idd->nic_serial, ioc3_class_names[res]);
-	return res;
-}
-/* Adds a new instance of an IOC3 card */
-static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
-{
-	struct ioc3_driver_data *idd;
-	uint32_t pcmd;
-	int ret, id;
-
-	/* Enable IOC3 and take ownership of it */
-	if ((ret = pci_enable_device(pdev))) {
-		printk(KERN_WARNING
-		       "%s: Failed to enable IOC3 device for pci_dev %s.\n",
-		       __func__, pci_name(pdev));
-		goto out;
-	}
-	pci_set_master(pdev);
-
-#ifdef USE_64BIT_DMA
-        ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
-        if (!ret) {
-                ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
-                if (ret < 0) {
-                        printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
-                               "for consistent allocations\n",
-				__func__);
-                }
-	}
-#endif
-
-	/* Set up per-IOC3 data */
-	idd = kzalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL);
-	if (!idd) {
-		printk(KERN_WARNING
-		       "%s: Failed to allocate IOC3 data for pci_dev %s.\n",
-		       __func__, pci_name(pdev));
-		ret = -ENODEV;
-		goto out_idd;
-	}
-	spin_lock_init(&idd->ir_lock);
-	spin_lock_init(&idd->gpio_lock);
-	idd->pdev = pdev;
-
-	/* Map all IOC3 registers.  These are shared between subdevices
-	 * so the main IOC3 module manages them.
-	 */
-	idd->pma = pci_resource_start(pdev, 0);
-	if (!idd->pma) {
-		printk(KERN_WARNING
-		       "%s: Unable to find IOC3 resource "
-		       "for pci_dev %s.\n",
-		       __func__, pci_name(pdev));
-		ret = -ENODEV;
-		goto out_pci;
-	}
-	if (!request_mem_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) {
-		printk(KERN_WARNING
-		       "%s: Unable to request IOC3 region "
-		       "for pci_dev %s.\n",
-		       __func__, pci_name(pdev));
-		ret = -ENODEV;
-		goto out_pci;
-	}
-	idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE);
-	if (!idd->vma) {
-		printk(KERN_WARNING
-		       "%s: Unable to remap IOC3 region "
-		       "for pci_dev %s.\n",
-		       __func__, pci_name(pdev));
-		ret = -ENODEV;
-		goto out_misc_region;
-	}
-
-	/* Track PCI-device specific data */
-	pci_set_drvdata(pdev, idd);
-	down_write(&ioc3_devices_rwsem);
-	list_add_tail(&idd->list, &ioc3_devices);
-	idd->id = ioc3_counter++;
-	up_write(&ioc3_devices_rwsem);
-
-	idd->gpdr_shadow = readl(&idd->vma->gpdr);
-
-	/* Read IOC3 NIC contents */
-	probe_nic(idd);
-
-	/* Detect IOC3 class */
-	idd->class = ioc3_class(idd);
-
-	/* Initialize IOC3 */
-       pci_read_config_dword(pdev, PCI_COMMAND, &pcmd);
-       pci_write_config_dword(pdev, PCI_COMMAND,
-                               pcmd | PCI_COMMAND_MEMORY |
-                               PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
-                               PCI_SCR_DROP_MODE_EN);
-
-	write_ireg(idd, ~0, IOC3_W_IEC);
-	writel(~0, &idd->vma->sio_ir);
-
-	/* Set up IRQs */
-	if(idd->class == IOC3_CLASS_BASE_IP30
-				|| idd->class == IOC3_CLASS_BASE_IP27) {
-		writel(0, &idd->vma->eier);
-		writel(~0, &idd->vma->eisr);
-
-		idd->dual_irq = 1;
-		if (!request_irq(pdev->irq, ioc3_intr_eth, IRQF_SHARED,
-				 "ioc3-eth", (void *)idd)) {
-			idd->irq_eth = pdev->irq;
-		} else {
-			printk(KERN_WARNING
-			       "%s : request_irq fails for IRQ 0x%x\n ",
-			       __func__, pdev->irq);
-		}
-		if (!request_irq(pdev->irq+2, ioc3_intr_io, IRQF_SHARED,
-				 "ioc3-io", (void *)idd)) {
-			idd->irq_io = pdev->irq+2;
-		} else {
-			printk(KERN_WARNING
-			       "%s : request_irq fails for IRQ 0x%x\n ",
-			       __func__, pdev->irq+2);
-		}
-	} else {
-		if (!request_irq(pdev->irq, ioc3_intr_io, IRQF_SHARED,
-				 "ioc3", (void *)idd)) {
-			idd->irq_io = pdev->irq;
-		} else {
-			printk(KERN_WARNING
-			       "%s : request_irq fails for IRQ 0x%x\n ",
-			       __func__, pdev->irq);
-		}
-	}
-
-	/* Add this IOC3 to all submodules */
-	for(id=0;id<IOC3_MAX_SUBMODULES;id++)
-		if(ioc3_submodules[id] && ioc3_submodules[id]->probe) {
-			idd->active[id] = 1;
-			idd->active[id] = !ioc3_submodules[id]->probe
-						(ioc3_submodules[id], idd);
-		}
-
-	printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));
-
-	return 0;
-
-out_misc_region:
-	release_mem_region(idd->pma, IOC3_PCI_SIZE);
-out_pci:
-	kfree(idd);
-out_idd:
-	pci_disable_device(pdev);
-out:
-	return ret;
-}
-
-/* Removes a particular instance of an IOC3 card. */
-static void ioc3_remove(struct pci_dev *pdev)
-{
-	int id;
-	struct ioc3_driver_data *idd;
-
-	idd = pci_get_drvdata(pdev);
-
-	/* Remove this IOC3 from all submodules */
-	for(id=0;id<IOC3_MAX_SUBMODULES;id++)
-		if(idd->active[id]) {
-			if(ioc3_submodules[id] && ioc3_submodules[id]->remove)
-				if(ioc3_submodules[id]->remove(ioc3_submodules[id],
-								idd))
-					printk(KERN_WARNING
-					       "%s: IOC3 submodule 0x%s remove failed "
-					       "for pci_dev %s.\n",
-						__func__,
-						module_name(ioc3_submodules[id]->owner),
-					        pci_name(pdev));
-			idd->active[id] = 0;
-		}
-
-	/* Clear and disable all IRQs */
-	write_ireg(idd, ~0, IOC3_W_IEC);
-	writel(~0, &idd->vma->sio_ir);
-
-	/* Release resources */
-	free_irq(idd->irq_io, (void *)idd);
-	if(idd->dual_irq)
-		free_irq(idd->irq_eth, (void *)idd);
-	iounmap(idd->vma);
-	release_mem_region(idd->pma, IOC3_PCI_SIZE);
-
-	/* Disable IOC3 and relinquish */
-	pci_disable_device(pdev);
-
-	/* Remove and free driver data */
-	down_write(&ioc3_devices_rwsem);
-	list_del(&idd->list);
-	up_write(&ioc3_devices_rwsem);
-	kfree(idd);
-}
-
-static struct pci_device_id ioc3_id_table[] = {
-	{PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID},
-	{0}
-};
-
-static struct pci_driver ioc3_driver = {
-	.name = "IOC3",
-	.id_table = ioc3_id_table,
-	.probe = ioc3_probe,
-	.remove = ioc3_remove,
-};
-
-MODULE_DEVICE_TABLE(pci, ioc3_id_table);
-
-/*********************
- * Module management *
- *********************/
-
-/* Module load */
-static int __init ioc3_init(void)
-{
-	if (ia64_platform_is("sn2"))
-		return pci_register_driver(&ioc3_driver);
-	return -ENODEV;
-}
-
-/* Module unload */
-static void __exit ioc3_exit(void)
-{
-	pci_unregister_driver(&ioc3_driver);
-}
-
-module_init(ioc3_init);
-module_exit(ioc3_exit);
-
-MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>");
-MODULE_DESCRIPTION("PCI driver for SGI IOC3");
-MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL_GPL(ioc3_register_submodule);
-EXPORT_SYMBOL_GPL(ioc3_unregister_submodule);
-EXPORT_SYMBOL_GPL(ioc3_ack);
-EXPORT_SYMBOL_GPL(ioc3_gpcr_set);
-EXPORT_SYMBOL_GPL(ioc3_disable);
-EXPORT_SYMBOL_GPL(ioc3_enable);
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 3083dbae35f7..2f631501c75f 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -855,16 +855,6 @@ config SERIAL_CPM_CONSOLE
 	  your boot loader (lilo or loadlin) about how to pass options to the
 	  kernel at boot time.)
 
-config SERIAL_SGI_L1_CONSOLE
-	bool "SGI Altix L1 serial console support"
-	depends on IA64_GENERIC || IA64_SGI_SN2
-	select SERIAL_CORE
-	select SERIAL_CORE_CONSOLE
-	help
-		If you have an SGI Altix and you would like to use the system
-		controller serial port as your console (you want this!),
-		say Y.  Otherwise, say N.
-
 config SERIAL_PIC32
 	tristate "Microchip PIC32 serial support"
 	depends on MACH_PIC32
@@ -982,23 +972,6 @@ config SERIAL_JSM
 	  To compile this driver as a module, choose M here: the
 	  module will be called jsm.
 
-config SERIAL_SGI_IOC4
-	tristate "SGI IOC4 controller serial support"
-	depends on (IA64_GENERIC || IA64_SGI_SN2) && SGI_IOC4
-	select SERIAL_CORE
-	help
-		If you have an SGI Altix with an IOC4 based Base IO card
-		and wish to use the serial ports on this card, say Y.
-		Otherwise, say N.
-
-config SERIAL_SGI_IOC3
-	tristate "SGI Altix IOC3 serial support"
-	depends on (IA64_GENERIC || IA64_SGI_SN2) && SGI_IOC3
-	select SERIAL_CORE
-	help
-	  If you have an SGI Altix with an IOC3 serial card,
-	  say Y or M.  Otherwise, say N.
-
 config SERIAL_MSM
 	tristate "MSM on-chip serial port support"
 	depends on ARCH_QCOM
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index 15a0fccadf7e..d2f44879384e 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -41,7 +41,6 @@ obj-$(CONFIG_SERIAL_HS_LPC32XX) += lpc32xx_hs.o
 obj-$(CONFIG_SERIAL_DZ) += dz.o
 obj-$(CONFIG_SERIAL_ZS) += zs.o
 obj-$(CONFIG_SERIAL_SH_SCI) += sh-sci.o
-obj-$(CONFIG_SERIAL_SGI_L1_CONSOLE) += sn_console.o
 obj-$(CONFIG_SERIAL_CPM) += cpm_uart/
 obj-$(CONFIG_SERIAL_IMX) += imx.o
 obj-$(CONFIG_SERIAL_MPC52xx) += mpc52xx_uart.o
@@ -53,8 +52,6 @@ obj-$(CONFIG_SERIAL_SC16IS7XX_CORE) += sc16is7xx.o
 obj-$(CONFIG_SERIAL_JSM) += jsm/
 obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o
 obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o
-obj-$(CONFIG_SERIAL_SGI_IOC4) += ioc4_serial.o
-obj-$(CONFIG_SERIAL_SGI_IOC3) += ioc3_serial.o
 obj-$(CONFIG_SERIAL_ATMEL) += atmel_serial.o
 obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o
 obj-$(CONFIG_SERIAL_MSM) += msm_serial.o
diff --git a/drivers/tty/serial/ioc3_serial.c b/drivers/tty/serial/ioc3_serial.c
deleted file mode 100644
index d8a1cdd6a53d..000000000000
--- a/drivers/tty/serial/ioc3_serial.c
+++ /dev/null
@@ -1,2195 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2005 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-/*
- * This file contains a module version of the ioc3 serial driver. This
- * includes all the support functions needed (support functions, etc.)
- * and the serial driver itself.
- */
-#include <linux/errno.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/circ_buf.h>
-#include <linux/serial_reg.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/serial_core.h>
-#include <linux/ioc3.h>
-#include <linux/slab.h>
-
-/*
- * Interesting things about the ioc3
- */
-
-#define LOGICAL_PORTS		2	/* rs232(0) and rs422(1) */
-#define PORTS_PER_CARD		2
-#define LOGICAL_PORTS_PER_CARD (PORTS_PER_CARD * LOGICAL_PORTS)
-#define MAX_CARDS		8
-#define MAX_LOGICAL_PORTS	(LOGICAL_PORTS_PER_CARD * MAX_CARDS)
-
-/* determine given the sio_ir what port it applies to */
-#define GET_PORT_FROM_SIO_IR(_x)	(_x & SIO_IR_SA) ? 0 : 1
-
-
-/*
- * we have 2 logical ports (rs232, rs422) for each physical port
- * evens are rs232, odds are rs422
- */
-#define GET_PHYSICAL_PORT(_x)	((_x) >> 1)
-#define GET_LOGICAL_PORT(_x)	((_x) & 1)
-#define IS_PHYSICAL_PORT(_x)	!((_x) & 1)
-#define IS_RS232(_x)		!((_x) & 1)
-
-static unsigned int Num_of_ioc3_cards;
-static unsigned int Submodule_slot;
-
-/* defining this will get you LOTS of great debug info */
-//#define DEBUG_INTERRUPTS
-#define DPRINT_CONFIG(_x...)	;
-//#define DPRINT_CONFIG(_x...)  printk _x
-#define NOT_PROGRESS()	;
-//#define NOT_PROGRESS()	printk("%s : fails %d\n", __func__, __LINE__)
-
-/* number of characters we want to transmit to the lower level at a time */
-#define MAX_CHARS		256
-#define FIFO_SIZE		(MAX_CHARS-1)	/* it's a uchar */
-
-/* Device name we're using */
-#define DEVICE_NAME		"ttySIOC"
-#define DEVICE_MAJOR		204
-#define DEVICE_MINOR		116
-
-/* flags for next_char_state */
-#define NCS_BREAK		0x1
-#define NCS_PARITY		0x2
-#define NCS_FRAMING		0x4
-#define NCS_OVERRUN		0x8
-
-/* cause we need SOME parameters ... */
-#define MIN_BAUD_SUPPORTED	1200
-#define MAX_BAUD_SUPPORTED	115200
-
-/* protocol types supported */
-#define PROTO_RS232		0
-#define PROTO_RS422		1
-
-/* Notification types */
-#define N_DATA_READY		0x01
-#define N_OUTPUT_LOWAT		0x02
-#define N_BREAK			0x04
-#define N_PARITY_ERROR		0x08
-#define N_FRAMING_ERROR		0x10
-#define N_OVERRUN_ERROR		0x20
-#define N_DDCD			0x40
-#define N_DCTS			0x80
-
-#define N_ALL_INPUT		(N_DATA_READY | N_BREAK			   \
-					| N_PARITY_ERROR | N_FRAMING_ERROR \
-					| N_OVERRUN_ERROR | N_DDCD | N_DCTS)
-
-#define N_ALL_OUTPUT		N_OUTPUT_LOWAT
-
-#define N_ALL_ERRORS		(N_PARITY_ERROR | N_FRAMING_ERROR \
-						| N_OVERRUN_ERROR)
-
-#define N_ALL			(N_DATA_READY | N_OUTPUT_LOWAT | N_BREAK    \
-					| N_PARITY_ERROR | N_FRAMING_ERROR  \
-					| N_OVERRUN_ERROR | N_DDCD | N_DCTS)
-
-#define SER_CLK_SPEED(prediv)	((22000000 << 1) / prediv)
-#define SER_DIVISOR(x, clk)	(((clk) + (x) * 8) / ((x) * 16))
-#define DIVISOR_TO_BAUD(div, clk) ((clk) / 16 / (div))
-
-/* Some masks */
-#define LCR_MASK_BITS_CHAR	(UART_LCR_WLEN5 | UART_LCR_WLEN6 \
-					| UART_LCR_WLEN7 | UART_LCR_WLEN8)
-#define LCR_MASK_STOP_BITS	(UART_LCR_STOP)
-
-#define PENDING(_a, _p)		(readl(&(_p)->vma->sio_ir) & (_a)->ic_enable)
-
-#define RING_BUF_SIZE		4096
-#define BUF_SIZE_BIT		SBBR_L_SIZE
-#define PROD_CONS_MASK		PROD_CONS_PTR_4K
-
-#define TOTAL_RING_BUF_SIZE	(RING_BUF_SIZE * 4)
-
-/* driver specific - one per card */
-struct ioc3_card {
-	struct {
-		/* uart ports are allocated here */
-		struct uart_port icp_uart_port[LOGICAL_PORTS];
-		/* the ioc3_port used for this port */
-		struct ioc3_port *icp_port;
-	} ic_port[PORTS_PER_CARD];
-	/* currently enabled interrupts */
-	uint32_t ic_enable;
-};
-
-/* Local port info for each IOC3 serial port */
-struct ioc3_port {
-	/* handy reference material */
-	struct uart_port *ip_port;
-	struct ioc3_card *ip_card;
-	struct ioc3_driver_data *ip_idd;
-	struct ioc3_submodule *ip_is;
-
-	/* pci mem addresses for this port */
-	struct ioc3_serialregs __iomem *ip_serial_regs;
-	struct ioc3_uartregs __iomem *ip_uart_regs;
-
-	/* Ring buffer page for this port */
-	dma_addr_t ip_dma_ringbuf;
-	/* vaddr of ring buffer */
-	struct ring_buffer *ip_cpu_ringbuf;
-
-	/* Rings for this port */
-	struct ring *ip_inring;
-	struct ring *ip_outring;
-
-	/* Hook to port specific values */
-	struct port_hooks *ip_hooks;
-
-	spinlock_t ip_lock;
-
-	/* Various rx/tx parameters */
-	int ip_baud;
-	int ip_tx_lowat;
-	int ip_rx_timeout;
-
-	/* Copy of notification bits */
-	int ip_notify;
-
-	/* Shadow copies of various registers so we don't need to PIO
-	 * read them constantly
-	 */
-	uint32_t ip_sscr;
-	uint32_t ip_tx_prod;
-	uint32_t ip_rx_cons;
-	unsigned char ip_flags;
-};
-
-/* tx low water mark.  We need to notify the driver whenever tx is getting
- * close to empty so it can refill the tx buffer and keep things going.
- * Let's assume that if we interrupt 1 ms before the tx goes idle, we'll
- * have no trouble getting in more chars in time (I certainly hope so).
- */
-#define TX_LOWAT_LATENCY      1000
-#define TX_LOWAT_HZ          (1000000 / TX_LOWAT_LATENCY)
-#define TX_LOWAT_CHARS(baud) (baud / 10 / TX_LOWAT_HZ)
-
-/* Flags per port */
-#define INPUT_HIGH		0x01
-	/* used to signify that we have turned off the rx_high
-	 * temporarily - we need to drain the fifo and don't
-	 * want to get blasted with interrupts.
-	 */
-#define DCD_ON			0x02
-	/* DCD state is on */
-#define LOWAT_WRITTEN		0x04
-#define READ_ABORTED		0x08
-	/* the read was aborted - used to avaoid infinate looping
-	 * in the interrupt handler
-	 */
-#define INPUT_ENABLE		0x10
-
-/* Since each port has different register offsets and bitmasks
- * for everything, we'll store those that we need in tables so we
- * don't have to be constantly checking the port we are dealing with.
- */
-struct port_hooks {
-	uint32_t intr_delta_dcd;
-	uint32_t intr_delta_cts;
-	uint32_t intr_tx_mt;
-	uint32_t intr_rx_timer;
-	uint32_t intr_rx_high;
-	uint32_t intr_tx_explicit;
-	uint32_t intr_clear;
-	uint32_t intr_all;
-	char rs422_select_pin;
-};
-
-static struct port_hooks hooks_array[PORTS_PER_CARD] = {
-	/* values for port A */
-	{
-	.intr_delta_dcd = SIO_IR_SA_DELTA_DCD,
-	.intr_delta_cts = SIO_IR_SA_DELTA_CTS,
-	.intr_tx_mt = SIO_IR_SA_TX_MT,
-	.intr_rx_timer = SIO_IR_SA_RX_TIMER,
-	.intr_rx_high = SIO_IR_SA_RX_HIGH,
-	.intr_tx_explicit = SIO_IR_SA_TX_EXPLICIT,
-	.intr_clear = (SIO_IR_SA_TX_MT | SIO_IR_SA_RX_FULL
-				| SIO_IR_SA_RX_HIGH
-				| SIO_IR_SA_RX_TIMER
-				| SIO_IR_SA_DELTA_DCD
-				| SIO_IR_SA_DELTA_CTS
-				| SIO_IR_SA_INT
-				| SIO_IR_SA_TX_EXPLICIT
-				| SIO_IR_SA_MEMERR),
-	.intr_all =  SIO_IR_SA,
-	.rs422_select_pin = GPPR_UARTA_MODESEL_PIN,
-	 },
-
-	/* values for port B */
-	{
-	.intr_delta_dcd = SIO_IR_SB_DELTA_DCD,
-	.intr_delta_cts = SIO_IR_SB_DELTA_CTS,
-	.intr_tx_mt = SIO_IR_SB_TX_MT,
-	.intr_rx_timer = SIO_IR_SB_RX_TIMER,
-	.intr_rx_high = SIO_IR_SB_RX_HIGH,
-	.intr_tx_explicit = SIO_IR_SB_TX_EXPLICIT,
-	.intr_clear = (SIO_IR_SB_TX_MT | SIO_IR_SB_RX_FULL
-				| SIO_IR_SB_RX_HIGH
-				| SIO_IR_SB_RX_TIMER
-				| SIO_IR_SB_DELTA_DCD
-				| SIO_IR_SB_DELTA_CTS
-				| SIO_IR_SB_INT
-				| SIO_IR_SB_TX_EXPLICIT
-				| SIO_IR_SB_MEMERR),
-	.intr_all = SIO_IR_SB,
-	.rs422_select_pin = GPPR_UARTB_MODESEL_PIN,
-	 }
-};
-
-struct ring_entry {
-	union {
-		struct {
-			uint32_t alldata;
-			uint32_t allsc;
-		} all;
-		struct {
-			char data[4];	/* data bytes */
-			char sc[4];	/* status/control */
-		} s;
-	} u;
-};
-
-/* Test the valid bits in any of the 4 sc chars using "allsc" member */
-#define RING_ANY_VALID \
-	((uint32_t)(RXSB_MODEM_VALID | RXSB_DATA_VALID) * 0x01010101)
-
-#define ring_sc		u.s.sc
-#define ring_data	u.s.data
-#define ring_allsc	u.all.allsc
-
-/* Number of entries per ring buffer. */
-#define ENTRIES_PER_RING (RING_BUF_SIZE / (int) sizeof(struct ring_entry))
-
-/* An individual ring */
-struct ring {
-	struct ring_entry entries[ENTRIES_PER_RING];
-};
-
-/* The whole enchilada */
-struct ring_buffer {
-	struct ring TX_A;
-	struct ring RX_A;
-	struct ring TX_B;
-	struct ring RX_B;
-};
-
-/* Get a ring from a port struct */
-#define RING(_p, _wh)	&(((struct ring_buffer *)((_p)->ip_cpu_ringbuf))->_wh)
-
-/* for Infinite loop detection  */
-#define MAXITER		10000000
-
-
-/**
- * set_baud - Baud rate setting code
- * @port: port to set
- * @baud: baud rate to use
- */
-static int set_baud(struct ioc3_port *port, int baud)
-{
-	int divisor;
-	int actual_baud;
-	int diff;
-	int lcr, prediv;
-	struct ioc3_uartregs __iomem *uart;
-
-	for (prediv = 6; prediv < 64; prediv++) {
-		divisor = SER_DIVISOR(baud, SER_CLK_SPEED(prediv));
-		if (!divisor)
-			continue;	/* invalid divisor */
-		actual_baud = DIVISOR_TO_BAUD(divisor, SER_CLK_SPEED(prediv));
-
-		diff = actual_baud - baud;
-		if (diff < 0)
-			diff = -diff;
-
-		/* if we're within 1% we've found a match */
-		if (diff * 100 <= actual_baud)
-			break;
-	}
-
-	/* if the above loop completed, we didn't match
-	 * the baud rate.  give up.
-	 */
-	if (prediv == 64) {
-		NOT_PROGRESS();
-		return 1;
-	}
-
-	uart = port->ip_uart_regs;
-	lcr = readb(&uart->iu_lcr);
-
-	writeb(lcr | UART_LCR_DLAB, &uart->iu_lcr);
-	writeb((unsigned char)divisor, &uart->iu_dll);
-	writeb((unsigned char)(divisor >> 8), &uart->iu_dlm);
-	writeb((unsigned char)prediv, &uart->iu_scr);
-	writeb((unsigned char)lcr, &uart->iu_lcr);
-
-	return 0;
-}
-
-/**
- * get_ioc3_port - given a uart port, return the control structure
- * @the_port: uart port to find
- */
-static struct ioc3_port *get_ioc3_port(struct uart_port *the_port)
-{
-	struct ioc3_driver_data *idd = dev_get_drvdata(the_port->dev);
-	struct ioc3_card *card_ptr = idd->data[Submodule_slot];
-	int ii, jj;
-
-	if (!card_ptr) {
-		NOT_PROGRESS();
-		return NULL;
-	}
-	for (ii = 0; ii < PORTS_PER_CARD; ii++) {
-		for (jj = 0; jj < LOGICAL_PORTS; jj++) {
-			if (the_port == &card_ptr->ic_port[ii].icp_uart_port[jj])
-				return card_ptr->ic_port[ii].icp_port;
-		}
-	}
-	NOT_PROGRESS();
-	return NULL;
-}
-
-/**
- * port_init - Initialize the sio and ioc3 hardware for a given port
- *			called per port from attach...
- * @port: port to initialize
- */
-static inline int port_init(struct ioc3_port *port)
-{
-	uint32_t sio_cr;
-	struct port_hooks *hooks = port->ip_hooks;
-	struct ioc3_uartregs __iomem *uart;
-	int reset_loop_counter = 0xfffff;
-	struct ioc3_driver_data *idd = port->ip_idd;
-
-	/* Idle the IOC3 serial interface */
-	writel(SSCR_RESET, &port->ip_serial_regs->sscr);
-
-	/* Wait until any pending bus activity for this port has ceased */
-	do {
-		sio_cr = readl(&idd->vma->sio_cr);
-		if (reset_loop_counter-- <= 0) {
-			printk(KERN_WARNING
-			       "IOC3 unable to come out of reset"
-				" scr 0x%x\n", sio_cr);
-			return -1;
-		}
-	} while (!(sio_cr & SIO_CR_ARB_DIAG_IDLE) &&
-	       (((sio_cr &= SIO_CR_ARB_DIAG) == SIO_CR_ARB_DIAG_TXA)
-		|| sio_cr == SIO_CR_ARB_DIAG_TXB
-		|| sio_cr == SIO_CR_ARB_DIAG_RXA
-		|| sio_cr == SIO_CR_ARB_DIAG_RXB));
-
-	/* Finish reset sequence */
-	writel(0, &port->ip_serial_regs->sscr);
-
-	/* Once RESET is done, reload cached tx_prod and rx_cons values
-	 * and set rings to empty by making prod == cons
-	 */
-	port->ip_tx_prod = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK;
-	writel(port->ip_tx_prod, &port->ip_serial_regs->stpir);
-	port->ip_rx_cons = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK;
-	writel(port->ip_rx_cons | SRCIR_ARM, &port->ip_serial_regs->srcir);
-
-	/* Disable interrupts for this 16550 */
-	uart = port->ip_uart_regs;
-	writeb(0, &uart->iu_lcr);
-	writeb(0, &uart->iu_ier);
-
-	/* Set the default baud */
-	set_baud(port, port->ip_baud);
-
-	/* Set line control to 8 bits no parity */
-	writeb(UART_LCR_WLEN8 | 0, &uart->iu_lcr);
-	/* UART_LCR_STOP == 1 stop */
-
-	/* Enable the FIFOs */
-	writeb(UART_FCR_ENABLE_FIFO, &uart->iu_fcr);
-	/* then reset 16550 FIFOs */
-	writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
-	       &uart->iu_fcr);
-
-	/* Clear modem control register */
-	writeb(0, &uart->iu_mcr);
-
-	/* Clear deltas in modem status register */
-	writel(0, &port->ip_serial_regs->shadow);
-
-	/* Only do this once per port pair */
-	if (port->ip_hooks == &hooks_array[0]) {
-		unsigned long ring_pci_addr;
-		uint32_t __iomem *sbbr_l, *sbbr_h;
-
-		sbbr_l = &idd->vma->sbbr_l;
-		sbbr_h = &idd->vma->sbbr_h;
-		ring_pci_addr = (unsigned long __iomem)port->ip_dma_ringbuf;
-		DPRINT_CONFIG(("%s: ring_pci_addr 0x%p\n",
-			       __func__, (void *)ring_pci_addr));
-
-		writel((unsigned int)((uint64_t) ring_pci_addr >> 32), sbbr_h);
-		writel((unsigned int)ring_pci_addr | BUF_SIZE_BIT, sbbr_l);
-	}
-
-	/* Set the receive timeout value to 10 msec */
-	writel(SRTR_HZ / 100, &port->ip_serial_regs->srtr);
-
-	/* Set rx threshold, enable DMA */
-	/* Set high water mark at 3/4 of full ring */
-	port->ip_sscr = (ENTRIES_PER_RING * 3 / 4);
-
-	/* uart experiences pauses at high baud rate reducing actual
-	 * throughput by 10% or so unless we enable high speed polling
-	 * XXX when this hardware bug is resolved we should revert to
-	 * normal polling speed
-	 */
-	port->ip_sscr |= SSCR_HIGH_SPD;
-
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-
-	/* Disable and clear all serial related interrupt bits */
-	port->ip_card->ic_enable &= ~hooks->intr_clear;
-	ioc3_disable(port->ip_is, idd, hooks->intr_clear);
-	ioc3_ack(port->ip_is, idd, hooks->intr_clear);
-	return 0;
-}
-
-/**
- * enable_intrs - enable interrupts
- * @port: port to enable
- * @mask: mask to use
- */
-static void enable_intrs(struct ioc3_port *port, uint32_t mask)
-{
-	if ((port->ip_card->ic_enable & mask) != mask) {
-		port->ip_card->ic_enable |= mask;
-		ioc3_enable(port->ip_is, port->ip_idd, mask);
-	}
-}
-
-/**
- * local_open - local open a port
- * @port: port to open
- */
-static inline int local_open(struct ioc3_port *port)
-{
-	int spiniter = 0;
-
-	port->ip_flags = INPUT_ENABLE;
-
-	/* Pause the DMA interface if necessary */
-	if (port->ip_sscr & SSCR_DMA_EN) {
-		writel(port->ip_sscr | SSCR_DMA_PAUSE,
-		       &port->ip_serial_regs->sscr);
-		while ((readl(&port->ip_serial_regs->sscr)
-			& SSCR_PAUSE_STATE) == 0) {
-			spiniter++;
-			if (spiniter > MAXITER) {
-				NOT_PROGRESS();
-				return -1;
-			}
-		}
-	}
-
-	/* Reset the input fifo.  If the uart received chars while the port
-	 * was closed and DMA is not enabled, the uart may have a bunch of
-	 * chars hanging around in its rx fifo which will not be discarded
-	 * by rclr in the upper layer. We must get rid of them here.
-	 */
-	writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR,
-	       &port->ip_uart_regs->iu_fcr);
-
-	writeb(UART_LCR_WLEN8, &port->ip_uart_regs->iu_lcr);
-	/* UART_LCR_STOP == 1 stop */
-
-	/* Re-enable DMA, set default threshold to intr whenever there is
-	 * data available.
-	 */
-	port->ip_sscr &= ~SSCR_RX_THRESHOLD;
-	port->ip_sscr |= 1;	/* default threshold */
-
-	/* Plug in the new sscr.  This implicitly clears the DMA_PAUSE
-	 * flag if it was set above
-	 */
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	port->ip_tx_lowat = 1;
-	return 0;
-}
-
-/**
- * set_rx_timeout - Set rx timeout and threshold values.
- * @port: port to use
- * @timeout: timeout value in ticks
- */
-static inline int set_rx_timeout(struct ioc3_port *port, int timeout)
-{
-	int threshold;
-
-	port->ip_rx_timeout = timeout;
-
-	/* Timeout is in ticks.  Let's figure out how many chars we
-	 * can receive at the current baud rate in that interval
-	 * and set the rx threshold to that amount.  There are 4 chars
-	 * per ring entry, so we'll divide the number of chars that will
-	 * arrive in timeout by 4.
-	 * So .... timeout * baud / 10 / HZ / 4, with HZ = 100.
-	 */
-	threshold = timeout * port->ip_baud / 4000;
-	if (threshold == 0)
-		threshold = 1;	/* otherwise we'll intr all the time! */
-
-	if ((unsigned)threshold > (unsigned)SSCR_RX_THRESHOLD)
-		return 1;
-
-	port->ip_sscr &= ~SSCR_RX_THRESHOLD;
-	port->ip_sscr |= threshold;
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-
-	/* Now set the rx timeout to the given value
-	 * again timeout * SRTR_HZ / HZ
-	 */
-	timeout = timeout * SRTR_HZ / 100;
-	if (timeout > SRTR_CNT)
-		timeout = SRTR_CNT;
-	writel(timeout, &port->ip_serial_regs->srtr);
-	return 0;
-}
-
-/**
- * config_port - config the hardware
- * @port: port to config
- * @baud: baud rate for the port
- * @byte_size: data size
- * @stop_bits: number of stop bits
- * @parenb: parity enable ?
- * @parodd: odd parity ?
- */
-static inline int
-config_port(struct ioc3_port *port,
-	    int baud, int byte_size, int stop_bits, int parenb, int parodd)
-{
-	char lcr, sizebits;
-	int spiniter = 0;
-
-	DPRINT_CONFIG(("%s: line %d baud %d byte_size %d stop %d parenb %d "
-			"parodd %d\n",
-		       __func__, ((struct uart_port *)port->ip_port)->line,
-			baud, byte_size, stop_bits, parenb, parodd));
-
-	if (set_baud(port, baud))
-		return 1;
-
-	switch (byte_size) {
-	case 5:
-		sizebits = UART_LCR_WLEN5;
-		break;
-	case 6:
-		sizebits = UART_LCR_WLEN6;
-		break;
-	case 7:
-		sizebits = UART_LCR_WLEN7;
-		break;
-	case 8:
-		sizebits = UART_LCR_WLEN8;
-		break;
-	default:
-		return 1;
-	}
-
-	/* Pause the DMA interface if necessary */
-	if (port->ip_sscr & SSCR_DMA_EN) {
-		writel(port->ip_sscr | SSCR_DMA_PAUSE,
-		       &port->ip_serial_regs->sscr);
-		while ((readl(&port->ip_serial_regs->sscr)
-			& SSCR_PAUSE_STATE) == 0) {
-			spiniter++;
-			if (spiniter > MAXITER)
-				return -1;
-		}
-	}
-
-	/* Clear relevant fields in lcr */
-	lcr = readb(&port->ip_uart_regs->iu_lcr);
-	lcr &= ~(LCR_MASK_BITS_CHAR | UART_LCR_EPAR |
-		 UART_LCR_PARITY | LCR_MASK_STOP_BITS);
-
-	/* Set byte size in lcr */
-	lcr |= sizebits;
-
-	/* Set parity */
-	if (parenb) {
-		lcr |= UART_LCR_PARITY;
-		if (!parodd)
-			lcr |= UART_LCR_EPAR;
-	}
-
-	/* Set stop bits */
-	if (stop_bits)
-		lcr |= UART_LCR_STOP /* 2 stop bits */ ;
-
-	writeb(lcr, &port->ip_uart_regs->iu_lcr);
-
-	/* Re-enable the DMA interface if necessary */
-	if (port->ip_sscr & SSCR_DMA_EN) {
-		writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	}
-	port->ip_baud = baud;
-
-	/* When we get within this number of ring entries of filling the
-	 * entire ring on tx, place an EXPLICIT intr to generate a lowat
-	 * notification when output has drained.
-	 */
-	port->ip_tx_lowat = (TX_LOWAT_CHARS(baud) + 3) / 4;
-	if (port->ip_tx_lowat == 0)
-		port->ip_tx_lowat = 1;
-
-	set_rx_timeout(port, 2);
-	return 0;
-}
-
-/**
- * do_write - Write bytes to the port.  Returns the number of bytes
- *			actually written. Called from transmit_chars
- * @port: port to use
- * @buf: the stuff to write
- * @len: how many bytes in 'buf'
- */
-static inline int do_write(struct ioc3_port *port, char *buf, int len)
-{
-	int prod_ptr, cons_ptr, total = 0;
-	struct ring *outring;
-	struct ring_entry *entry;
-	struct port_hooks *hooks = port->ip_hooks;
-
-	BUG_ON(!(len >= 0));
-
-	prod_ptr = port->ip_tx_prod;
-	cons_ptr = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK;
-	outring = port->ip_outring;
-
-	/* Maintain a 1-entry red-zone.  The ring buffer is full when
-	 * (cons - prod) % ring_size is 1.  Rather than do this subtraction
-	 * in the body of the loop, I'll do it now.
-	 */
-	cons_ptr = (cons_ptr - (int)sizeof(struct ring_entry)) & PROD_CONS_MASK;
-
-	/* Stuff the bytes into the output */
-	while ((prod_ptr != cons_ptr) && (len > 0)) {
-		int xx;
-
-		/* Get 4 bytes (one ring entry) at a time */
-		entry = (struct ring_entry *)((caddr_t) outring + prod_ptr);
-
-		/* Invalidate all entries */
-		entry->ring_allsc = 0;
-
-		/* Copy in some bytes */
-		for (xx = 0; (xx < 4) && (len > 0); xx++) {
-			entry->ring_data[xx] = *buf++;
-			entry->ring_sc[xx] = TXCB_VALID;
-			len--;
-			total++;
-		}
-
-		/* If we are within some small threshold of filling up the
-		 * entire ring buffer, we must place an EXPLICIT intr here
-		 * to generate a lowat interrupt in case we subsequently
-		 * really do fill up the ring and the caller goes to sleep.
-		 * No need to place more than one though.
-		 */
-		if (!(port->ip_flags & LOWAT_WRITTEN) &&
-		    ((cons_ptr - prod_ptr) & PROD_CONS_MASK)
-		    <= port->ip_tx_lowat * (int)sizeof(struct ring_entry)) {
-			port->ip_flags |= LOWAT_WRITTEN;
-			entry->ring_sc[0] |= TXCB_INT_WHEN_DONE;
-		}
-
-		/* Go on to next entry */
-		prod_ptr += sizeof(struct ring_entry);
-		prod_ptr &= PROD_CONS_MASK;
-	}
-
-	/* If we sent something, start DMA if necessary */
-	if (total > 0 && !(port->ip_sscr & SSCR_DMA_EN)) {
-		port->ip_sscr |= SSCR_DMA_EN;
-		writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	}
-
-	/* Store the new producer pointer.  If tx is disabled, we stuff the
-	 * data into the ring buffer, but we don't actually start tx.
-	 */
-	if (!uart_tx_stopped(port->ip_port)) {
-		writel(prod_ptr, &port->ip_serial_regs->stpir);
-
-		/* If we are now transmitting, enable tx_mt interrupt so we
-		 * can disable DMA if necessary when the tx finishes.
-		 */
-		if (total > 0)
-			enable_intrs(port, hooks->intr_tx_mt);
-	}
-	port->ip_tx_prod = prod_ptr;
-
-	return total;
-}
-
-/**
- * disable_intrs - disable interrupts
- * @port: port to enable
- * @mask: mask to use
- */
-static inline void disable_intrs(struct ioc3_port *port, uint32_t mask)
-{
-	if (port->ip_card->ic_enable & mask) {
-		ioc3_disable(port->ip_is, port->ip_idd, mask);
-		port->ip_card->ic_enable &= ~mask;
-	}
-}
-
-/**
- * set_notification - Modify event notification
- * @port: port to use
- * @mask: events mask
- * @set_on: set ?
- */
-static int set_notification(struct ioc3_port *port, int mask, int set_on)
-{
-	struct port_hooks *hooks = port->ip_hooks;
-	uint32_t intrbits, sscrbits;
-
-	BUG_ON(!mask);
-
-	intrbits = sscrbits = 0;
-
-	if (mask & N_DATA_READY)
-		intrbits |= (hooks->intr_rx_timer | hooks->intr_rx_high);
-	if (mask & N_OUTPUT_LOWAT)
-		intrbits |= hooks->intr_tx_explicit;
-	if (mask & N_DDCD) {
-		intrbits |= hooks->intr_delta_dcd;
-		sscrbits |= SSCR_RX_RING_DCD;
-	}
-	if (mask & N_DCTS)
-		intrbits |= hooks->intr_delta_cts;
-
-	if (set_on) {
-		enable_intrs(port, intrbits);
-		port->ip_notify |= mask;
-		port->ip_sscr |= sscrbits;
-	} else {
-		disable_intrs(port, intrbits);
-		port->ip_notify &= ~mask;
-		port->ip_sscr &= ~sscrbits;
-	}
-
-	/* We require DMA if either DATA_READY or DDCD notification is
-	 * currently requested. If neither of these is requested and
-	 * there is currently no tx in progress, DMA may be disabled.
-	 */
-	if (port->ip_notify & (N_DATA_READY | N_DDCD))
-		port->ip_sscr |= SSCR_DMA_EN;
-	else if (!(port->ip_card->ic_enable & hooks->intr_tx_mt))
-		port->ip_sscr &= ~SSCR_DMA_EN;
-
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	return 0;
-}
-
-/**
- * set_mcr - set the master control reg
- * @the_port: port to use
- * @mask1: mcr mask
- * @mask2: shadow mask
- */
-static inline int set_mcr(struct uart_port *the_port,
-			  int mask1, int mask2)
-{
-	struct ioc3_port *port = get_ioc3_port(the_port);
-	uint32_t shadow;
-	int spiniter = 0;
-	char mcr;
-
-	if (!port)
-		return -1;
-
-	/* Pause the DMA interface if necessary */
-	if (port->ip_sscr & SSCR_DMA_EN) {
-		writel(port->ip_sscr | SSCR_DMA_PAUSE,
-		       &port->ip_serial_regs->sscr);
-		while ((readl(&port->ip_serial_regs->sscr)
-			& SSCR_PAUSE_STATE) == 0) {
-			spiniter++;
-			if (spiniter > MAXITER)
-				return -1;
-		}
-	}
-	shadow = readl(&port->ip_serial_regs->shadow);
-	mcr = (shadow & 0xff000000) >> 24;
-
-	/* Set new value */
-	mcr |= mask1;
-	shadow |= mask2;
-	writeb(mcr, &port->ip_uart_regs->iu_mcr);
-	writel(shadow, &port->ip_serial_regs->shadow);
-
-	/* Re-enable the DMA interface if necessary */
-	if (port->ip_sscr & SSCR_DMA_EN) {
-		writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	}
-	return 0;
-}
-
-/**
- * ioc3_set_proto - set the protocol for the port
- * @port: port to use
- * @proto: protocol to use
- */
-static int ioc3_set_proto(struct ioc3_port *port, int proto)
-{
-	struct port_hooks *hooks = port->ip_hooks;
-
-	switch (proto) {
-	default:
-	case PROTO_RS232:
-		/* Clear the appropriate GIO pin */
-		DPRINT_CONFIG(("%s: rs232\n", __func__));
-		writel(0, (&port->ip_idd->vma->gppr[0]
-					+ hooks->rs422_select_pin));
-		break;
-
-	case PROTO_RS422:
-		/* Set the appropriate GIO pin */
-		DPRINT_CONFIG(("%s: rs422\n", __func__));
-		writel(1, (&port->ip_idd->vma->gppr[0]
-					+ hooks->rs422_select_pin));
-		break;
-	}
-	return 0;
-}
-
-/**
- * transmit_chars - upper level write, called with the_port->lock
- * @the_port: port to write
- */
-static void transmit_chars(struct uart_port *the_port)
-{
-	int xmit_count, tail, head;
-	int result;
-	char *start;
-	struct tty_struct *tty;
-	struct ioc3_port *port = get_ioc3_port(the_port);
-	struct uart_state *state;
-
-	if (!the_port)
-		return;
-	if (!port)
-		return;
-
-	state = the_port->state;
-	tty = state->port.tty;
-
-	if (uart_circ_empty(&state->xmit) || uart_tx_stopped(the_port)) {
-		/* Nothing to do or hw stopped */
-		set_notification(port, N_ALL_OUTPUT, 0);
-		return;
-	}
-
-	head = state->xmit.head;
-	tail = state->xmit.tail;
-	start = (char *)&state->xmit.buf[tail];
-
-	/* write out all the data or until the end of the buffer */
-	xmit_count = (head < tail) ? (UART_XMIT_SIZE - tail) : (head - tail);
-	if (xmit_count > 0) {
-		result = do_write(port, start, xmit_count);
-		if (result > 0) {
-			/* booking */
-			xmit_count -= result;
-			the_port->icount.tx += result;
-			/* advance the pointers */
-			tail += result;
-			tail &= UART_XMIT_SIZE - 1;
-			state->xmit.tail = tail;
-			start = (char *)&state->xmit.buf[tail];
-		}
-	}
-	if (uart_circ_chars_pending(&state->xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(the_port);
-
-	if (uart_circ_empty(&state->xmit)) {
-		set_notification(port, N_OUTPUT_LOWAT, 0);
-	} else {
-		set_notification(port, N_OUTPUT_LOWAT, 1);
-	}
-}
-
-/**
- * ioc3_change_speed - change the speed of the port
- * @the_port: port to change
- * @new_termios: new termios settings
- * @old_termios: old termios settings
- */
-static void
-ioc3_change_speed(struct uart_port *the_port,
-		  struct ktermios *new_termios, struct ktermios *old_termios)
-{
-	struct ioc3_port *port = get_ioc3_port(the_port);
-	unsigned int cflag, iflag;
-	int baud;
-	int new_parity = 0, new_parity_enable = 0, new_stop = 0, new_data = 8;
-	struct uart_state *state = the_port->state;
-
-	cflag = new_termios->c_cflag;
-	iflag = new_termios->c_iflag;
-
-	switch (cflag & CSIZE) {
-	case CS5:
-		new_data = 5;
-		break;
-	case CS6:
-		new_data = 6;
-		break;
-	case CS7:
-		new_data = 7;
-		break;
-	case CS8:
-		new_data = 8;
-		break;
-	default:
-		/* cuz we always need a default ... */
-		new_data = 5;
-		break;
-	}
-	if (cflag & CSTOPB) {
-		new_stop = 1;
-	}
-	if (cflag & PARENB) {
-		new_parity_enable = 1;
-		if (cflag & PARODD)
-			new_parity = 1;
-	}
-	baud = uart_get_baud_rate(the_port, new_termios, old_termios,
-				  MIN_BAUD_SUPPORTED, MAX_BAUD_SUPPORTED);
-	DPRINT_CONFIG(("%s: returned baud %d for line %d\n", __func__, baud,
-				the_port->line));
-
-	if (!the_port->fifosize)
-		the_port->fifosize = FIFO_SIZE;
-	uart_update_timeout(the_port, cflag, baud);
-
-	the_port->ignore_status_mask = N_ALL_INPUT;
-
-	state->port.low_latency = 1;
-
-	if (iflag & IGNPAR)
-		the_port->ignore_status_mask &= ~(N_PARITY_ERROR
-						  | N_FRAMING_ERROR);
-	if (iflag & IGNBRK) {
-		the_port->ignore_status_mask &= ~N_BREAK;
-		if (iflag & IGNPAR)
-			the_port->ignore_status_mask &= ~N_OVERRUN_ERROR;
-	}
-	if (!(cflag & CREAD)) {
-		/* ignore everything */
-		the_port->ignore_status_mask &= ~N_DATA_READY;
-	}
-
-	if (cflag & CRTSCTS) {
-		/* enable hardware flow control */
-		port->ip_sscr |= SSCR_HFC_EN;
-	}
-	else {
-		/* disable hardware flow control */
-		port->ip_sscr &= ~SSCR_HFC_EN;
-	}
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-
-	/* Set the configuration and proper notification call */
-	DPRINT_CONFIG(("%s : port 0x%p line %d cflag 0%o "
-		       "config_port(baud %d data %d stop %d penable %d "
-			" parity %d), notification 0x%x\n",
-		       __func__, (void *)port, the_port->line, cflag, baud,
-		       new_data, new_stop, new_parity_enable, new_parity,
-		       the_port->ignore_status_mask));
-
-	if ((config_port(port, baud,	/* baud */
-			 new_data,	/* byte size */
-			 new_stop,	/* stop bits */
-			 new_parity_enable,	/* set parity */
-			 new_parity)) >= 0) {	/* parity 1==odd */
-		set_notification(port, the_port->ignore_status_mask, 1);
-	}
-}
-
-/**
- * ic3_startup_local - Start up the serial port - returns >= 0 if no errors
- * @the_port: Port to operate on
- */
-static inline int ic3_startup_local(struct uart_port *the_port)
-{
-	struct ioc3_port *port;
-
-	if (!the_port) {
-		NOT_PROGRESS();
-		return -1;
-	}
-
-	port = get_ioc3_port(the_port);
-	if (!port) {
-		NOT_PROGRESS();
-		return -1;
-	}
-
-	local_open(port);
-
-	/* set the protocol */
-	ioc3_set_proto(port, IS_RS232(the_port->line) ? PROTO_RS232 :
-							PROTO_RS422);
-	return 0;
-}
-
-/*
- * ioc3_cb_output_lowat - called when the output low water mark is hit
- * @port: port to output
- */
-static void ioc3_cb_output_lowat(struct ioc3_port *port)
-{
-	unsigned long pflags;
-
-	/* the_port->lock is set on the call here */
-	if (port->ip_port) {
-		spin_lock_irqsave(&port->ip_port->lock, pflags);
-		transmit_chars(port->ip_port);
-		spin_unlock_irqrestore(&port->ip_port->lock, pflags);
-	}
-}
-
-/*
- * ioc3_cb_post_ncs - called for some basic errors
- * @port: port to use
- * @ncs: event
- */
-static void ioc3_cb_post_ncs(struct uart_port *the_port, int ncs)
-{
-	struct uart_icount *icount;
-
-	icount = &the_port->icount;
-
-	if (ncs & NCS_BREAK)
-		icount->brk++;
-	if (ncs & NCS_FRAMING)
-		icount->frame++;
-	if (ncs & NCS_OVERRUN)
-		icount->overrun++;
-	if (ncs & NCS_PARITY)
-		icount->parity++;
-}
-
-/**
- * do_read - Read in bytes from the port.  Return the number of bytes
- *			actually read.
- * @the_port: port to use
- * @buf: place to put the stuff we read
- * @len: how big 'buf' is
- */
-
-static inline int do_read(struct uart_port *the_port, char *buf, int len)
-{
-	int prod_ptr, cons_ptr, total;
-	struct ioc3_port *port = get_ioc3_port(the_port);
-	struct ring *inring;
-	struct ring_entry *entry;
-	struct port_hooks *hooks;
-	int byte_num;
-	char *sc;
-	int loop_counter;
-
-	BUG_ON(!(len >= 0));
-	BUG_ON(!port);
-	hooks = port->ip_hooks;
-
-	/* There is a nasty timing issue in the IOC3. When the rx_timer
-	 * expires or the rx_high condition arises, we take an interrupt.
-	 * At some point while servicing the interrupt, we read bytes from
-	 * the ring buffer and re-arm the rx_timer.  However the rx_timer is
-	 * not started until the first byte is received *after* it is armed,
-	 * and any bytes pending in the rx construction buffers are not drained
-	 * to memory until either there are 4 bytes available or the rx_timer
-	 * expires.  This leads to a potential situation where data is left
-	 * in the construction buffers forever - 1 to 3 bytes were received
-	 * after the interrupt was generated but before the rx_timer was
-	 * re-armed. At that point as long as no subsequent bytes are received
-	 * the timer will never be started and the bytes will remain in the
-	 * construction buffer forever.  The solution is to execute a DRAIN
-	 * command after rearming the timer.  This way any bytes received before
-	 * the DRAIN will be drained to memory, and any bytes received after
-	 * the DRAIN will start the TIMER and be drained when it expires.
-	 * Luckily, this only needs to be done when the DMA buffer is empty
-	 * since there is no requirement that this function return all
-	 * available data as long as it returns some.
-	 */
-	/* Re-arm the timer */
-
-	writel(port->ip_rx_cons | SRCIR_ARM, &port->ip_serial_regs->srcir);
-
-	prod_ptr = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK;
-	cons_ptr = port->ip_rx_cons;
-
-	if (prod_ptr == cons_ptr) {
-		int reset_dma = 0;
-
-		/* Input buffer appears empty, do a flush. */
-
-		/* DMA must be enabled for this to work. */
-		if (!(port->ip_sscr & SSCR_DMA_EN)) {
-			port->ip_sscr |= SSCR_DMA_EN;
-			reset_dma = 1;
-		}
-
-		/* Potential race condition: we must reload the srpir after
-		 * issuing the drain command, otherwise we could think the rx
-		 * buffer is empty, then take a very long interrupt, and when
-		 * we come back it's full and we wait forever for the drain to
-		 * complete.
-		 */
-		writel(port->ip_sscr | SSCR_RX_DRAIN,
-		       &port->ip_serial_regs->sscr);
-		prod_ptr = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK;
-
-		/* We must not wait for the DRAIN to complete unless there are
-		 * at least 8 bytes (2 ring entries) available to receive the
-		 * data otherwise the DRAIN will never complete and we'll
-		 * deadlock here.
-		 * In fact, to make things easier, I'll just ignore the flush if
-		 * there is any data at all now available.
-		 */
-		if (prod_ptr == cons_ptr) {
-			loop_counter = 0;
-			while (readl(&port->ip_serial_regs->sscr) &
-			       SSCR_RX_DRAIN) {
-				loop_counter++;
-				if (loop_counter > MAXITER)
-					return -1;
-			}
-
-			/* SIGH. We have to reload the prod_ptr *again* since
-			 * the drain may have caused it to change
-			 */
-			prod_ptr = readl(&port->ip_serial_regs->srpir)
-			    & PROD_CONS_MASK;
-		}
-		if (reset_dma) {
-			port->ip_sscr &= ~SSCR_DMA_EN;
-			writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-		}
-	}
-	inring = port->ip_inring;
-	port->ip_flags &= ~READ_ABORTED;
-
-	total = 0;
-	loop_counter = 0xfffff;	/* to avoid hangs */
-
-	/* Grab bytes from the hardware */
-	while ((prod_ptr != cons_ptr) && (len > 0)) {
-		entry = (struct ring_entry *)((caddr_t) inring + cons_ptr);
-
-		if (loop_counter-- <= 0) {
-			printk(KERN_WARNING "IOC3 serial: "
-			       "possible hang condition/"
-			       "port stuck on read (line %d).\n",
-				the_port->line);
-			break;
-		}
-
-		/* According to the producer pointer, this ring entry
-		 * must contain some data.  But if the PIO happened faster
-		 * than the DMA, the data may not be available yet, so let's
-		 * wait until it arrives.
-		 */
-		if ((entry->ring_allsc & RING_ANY_VALID) == 0) {
-			/* Indicate the read is aborted so we don't disable
-			 * the interrupt thinking that the consumer is
-			 * congested.
-			 */
-			port->ip_flags |= READ_ABORTED;
-			len = 0;
-			break;
-		}
-
-		/* Load the bytes/status out of the ring entry */
-		for (byte_num = 0; byte_num < 4 && len > 0; byte_num++) {
-			sc = &(entry->ring_sc[byte_num]);
-
-			/* Check for change in modem state or overrun */
-			if ((*sc & RXSB_MODEM_VALID)
-			    && (port->ip_notify & N_DDCD)) {
-				/* Notify upper layer if DCD dropped */
-				if ((port->ip_flags & DCD_ON)
-				    && !(*sc & RXSB_DCD)) {
-					/* If we have already copied some data,
-					 * return it.  We'll pick up the carrier
-					 * drop on the next pass.  That way we
-					 * don't throw away the data that has
-					 * already been copied back to
-					 * the caller's buffer.
-					 */
-					if (total > 0) {
-						len = 0;
-						break;
-					}
-					port->ip_flags &= ~DCD_ON;
-
-					/* Turn off this notification so the
-					 * carrier drop protocol won't see it
-					 * again when it does a read.
-					 */
-					*sc &= ~RXSB_MODEM_VALID;
-
-					/* To keep things consistent, we need
-					 * to update the consumer pointer so
-					 * the next reader won't come in and
-					 * try to read the same ring entries
-					 * again. This must be done here before
-					 * the dcd change.
-					 */
-
-					if ((entry->ring_allsc & RING_ANY_VALID)
-					    == 0) {
-						cons_ptr += (int)sizeof
-						    (struct ring_entry);
-						cons_ptr &= PROD_CONS_MASK;
-					}
-					writel(cons_ptr,
-					       &port->ip_serial_regs->srcir);
-					port->ip_rx_cons = cons_ptr;
-
-					/* Notify upper layer of carrier drop */
-					if ((port->ip_notify & N_DDCD)
-					    && port->ip_port) {
-						uart_handle_dcd_change
-							(port->ip_port, 0);
-						wake_up_interruptible
-						    (&the_port->state->
-						     port.delta_msr_wait);
-					}
-
-					/* If we had any data to return, we
-					 * would have returned it above.
-					 */
-					return 0;
-				}
-			}
-			if (*sc & RXSB_MODEM_VALID) {
-				/* Notify that an input overrun occurred */
-				if ((*sc & RXSB_OVERRUN)
-				    && (port->ip_notify & N_OVERRUN_ERROR)) {
-					ioc3_cb_post_ncs(the_port, NCS_OVERRUN);
-				}
-				/* Don't look at this byte again */
-				*sc &= ~RXSB_MODEM_VALID;
-			}
-
-			/* Check for valid data or RX errors */
-			if ((*sc & RXSB_DATA_VALID) &&
-			    ((*sc & (RXSB_PAR_ERR
-				     | RXSB_FRAME_ERR | RXSB_BREAK))
-			     && (port->ip_notify & (N_PARITY_ERROR
-						    | N_FRAMING_ERROR
-						    | N_BREAK)))) {
-				/* There is an error condition on the next byte.
-				 * If we have already transferred some bytes,
-				 * we'll stop here. Otherwise if this is the
-				 * first byte to be read, we'll just transfer
-				 * it alone after notifying the
-				 * upper layer of its status.
-				 */
-				if (total > 0) {
-					len = 0;
-					break;
-				} else {
-					if ((*sc & RXSB_PAR_ERR) &&
-					    (port->
-					     ip_notify & N_PARITY_ERROR)) {
-						ioc3_cb_post_ncs(the_port,
-								 NCS_PARITY);
-					}
-					if ((*sc & RXSB_FRAME_ERR) &&
-					    (port->
-					     ip_notify & N_FRAMING_ERROR)) {
-						ioc3_cb_post_ncs(the_port,
-								 NCS_FRAMING);
-					}
-					if ((*sc & RXSB_BREAK)
-					    && (port->ip_notify & N_BREAK)) {
-						ioc3_cb_post_ncs
-						    (the_port, NCS_BREAK);
-					}
-					len = 1;
-				}
-			}
-			if (*sc & RXSB_DATA_VALID) {
-				*sc &= ~RXSB_DATA_VALID;
-				*buf = entry->ring_data[byte_num];
-				buf++;
-				len--;
-				total++;
-			}
-		}
-
-		/* If we used up this entry entirely, go on to the next one,
-		 * otherwise we must have run out of buffer space, so
-		 * leave the consumer pointer here for the next read in case
-		 * there are still unread bytes in this entry.
-		 */
-		if ((entry->ring_allsc & RING_ANY_VALID) == 0) {
-			cons_ptr += (int)sizeof(struct ring_entry);
-			cons_ptr &= PROD_CONS_MASK;
-		}
-	}
-
-	/* Update consumer pointer and re-arm rx timer interrupt */
-	writel(cons_ptr, &port->ip_serial_regs->srcir);
-	port->ip_rx_cons = cons_ptr;
-
-	/* If we have now dipped below the rx high water mark and we have
-	 * rx_high interrupt turned off, we can now turn it back on again.
-	 */
-	if ((port->ip_flags & INPUT_HIGH) && (((prod_ptr - cons_ptr)
-					       & PROD_CONS_MASK) <
-					      ((port->
-						ip_sscr &
-						SSCR_RX_THRESHOLD)
-					       << PROD_CONS_PTR_OFF))) {
-		port->ip_flags &= ~INPUT_HIGH;
-		enable_intrs(port, hooks->intr_rx_high);
-	}
-	return total;
-}
-
-/**
- * receive_chars - upper level read.
- * @the_port: port to read from
- */
-static int receive_chars(struct uart_port *the_port)
-{
-	unsigned char ch[MAX_CHARS];
-	int read_count = 0, read_room, flip = 0;
-	struct uart_state *state = the_port->state;
-	struct ioc3_port *port = get_ioc3_port(the_port);
-	unsigned long pflags;
-
-	/* Make sure all the pointers are "good" ones */
-	if (!state)
-		return 0;
-
-	if (!(port->ip_flags & INPUT_ENABLE))
-		return 0;
-
-	spin_lock_irqsave(&the_port->lock, pflags);
-
-	read_count = do_read(the_port, ch, MAX_CHARS);
-	if (read_count > 0) {
-		flip = 1;
-		read_room = tty_insert_flip_string(&state->port, ch,
-				read_count);
-		the_port->icount.rx += read_count;
-	}
-	spin_unlock_irqrestore(&the_port->lock, pflags);
-
-	if (flip)
-		tty_flip_buffer_push(&state->port);
-
-	return read_count;
-}
-
-/**
- * ioc3uart_intr_one - lowest level (per port) interrupt handler.
- * @is : submodule
- * @idd: driver data
- * @pending: interrupts to handle
- */
-
-static inline int
-ioc3uart_intr_one(struct ioc3_submodule *is,
-			struct ioc3_driver_data *idd,
-			unsigned int pending)
-{
-	int port_num = GET_PORT_FROM_SIO_IR(pending);
-	struct port_hooks *hooks;
-	unsigned int rx_high_rd_aborted = 0;
-	unsigned long flags;
-	struct uart_port *the_port;
-	struct ioc3_port *port;
-	int loop_counter;
-	struct ioc3_card *card_ptr;
-	unsigned int sio_ir;
-
-	card_ptr = idd->data[is->id];
-	port = card_ptr->ic_port[port_num].icp_port;
-	hooks = port->ip_hooks;
-
-	/* Possible race condition here: The tx_mt interrupt bit may be
-	 * cleared without the intervention of the interrupt handler,
-	 * e.g. by a write.  If the top level interrupt handler reads a
-	 * tx_mt, then some other processor does a write, starting up
-	 * output, then we come in here, see the tx_mt and stop DMA, the
-	 * output started by the other processor will hang.  Thus we can
-	 * only rely on tx_mt being legitimate if it is read while the
-	 * port lock is held.  Therefore this bit must be ignored in the
-	 * passed in interrupt mask which was read by the top level
-	 * interrupt handler since the port lock was not held at the time
-	 * it was read.  We can only rely on this bit being accurate if it
-	 * is read while the port lock is held.  So we'll clear it for now,
-	 * and reload it later once we have the port lock.
-	 */
-
-	sio_ir = pending & ~(hooks->intr_tx_mt);
-	spin_lock_irqsave(&port->ip_lock, flags);
-
-	loop_counter = MAXITER;	/* to avoid hangs */
-
-	do {
-		uint32_t shadow;
-
-		if (loop_counter-- <= 0) {
-			printk(KERN_WARNING "IOC3 serial: "
-			       "possible hang condition/"
-			       "port stuck on interrupt (line %d).\n",
-				((struct uart_port *)port->ip_port)->line);
-			break;
-		}
-		/* Handle a DCD change */
-		if (sio_ir & hooks->intr_delta_dcd) {
-			ioc3_ack(is, idd, hooks->intr_delta_dcd);
-			shadow = readl(&port->ip_serial_regs->shadow);
-
-			if ((port->ip_notify & N_DDCD)
-			    && (shadow & SHADOW_DCD)
-			    && (port->ip_port)) {
-				the_port = port->ip_port;
-				uart_handle_dcd_change(the_port,
-						shadow & SHADOW_DCD);
-				wake_up_interruptible
-				    (&the_port->state->port.delta_msr_wait);
-			} else if ((port->ip_notify & N_DDCD)
-				   && !(shadow & SHADOW_DCD)) {
-				/* Flag delta DCD/no DCD */
-				uart_handle_dcd_change(port->ip_port,
-						shadow & SHADOW_DCD);
-				port->ip_flags |= DCD_ON;
-			}
-		}
-
-		/* Handle a CTS change */
-		if (sio_ir & hooks->intr_delta_cts) {
-			ioc3_ack(is, idd, hooks->intr_delta_cts);
-			shadow = readl(&port->ip_serial_regs->shadow);
-
-			if ((port->ip_notify & N_DCTS) && (port->ip_port)) {
-				the_port = port->ip_port;
-				uart_handle_cts_change(the_port, shadow
-						& SHADOW_CTS);
-				wake_up_interruptible
-				    (&the_port->state->port.delta_msr_wait);
-			}
-		}
-
-		/* rx timeout interrupt.  Must be some data available.  Put this
-		 * before the check for rx_high since servicing this condition
-		 * may cause that condition to clear.
-		 */
-		if (sio_ir & hooks->intr_rx_timer) {
-			ioc3_ack(is, idd, hooks->intr_rx_timer);
-			if ((port->ip_notify & N_DATA_READY)
-						&& (port->ip_port)) {
-				receive_chars(port->ip_port);
-			}
-		}
-
-		/* rx high interrupt. Must be after rx_timer.  */
-		else if (sio_ir & hooks->intr_rx_high) {
-			/* Data available, notify upper layer */
-			if ((port->ip_notify & N_DATA_READY) && port->ip_port) {
-				receive_chars(port->ip_port);
-			}
-
-			/* We can't ACK this interrupt.  If receive_chars didn't
-			 * cause the condition to clear, we'll have to disable
-			 * the interrupt until the data is drained.
-			 * If the read was aborted, don't disable the interrupt
-			 * as this may cause us to hang indefinitely.  An
-			 * aborted read generally means that this interrupt
-			 * hasn't been delivered to the cpu yet anyway, even
-			 * though we see it as asserted when we read the sio_ir.
-			 */
-			if ((sio_ir = PENDING(card_ptr, idd))
-					& hooks->intr_rx_high) {
-				if (port->ip_flags & READ_ABORTED) {
-					rx_high_rd_aborted++;
-				}
-				else {
-					card_ptr->ic_enable &= ~hooks->intr_rx_high;
-					port->ip_flags |= INPUT_HIGH;
-				}
-			}
-		}
-
-		/* We got a low water interrupt: notify upper layer to
-		 * send more data.  Must come before tx_mt since servicing
-		 * this condition may cause that condition to clear.
-		 */
-		if (sio_ir & hooks->intr_tx_explicit) {
-			port->ip_flags &= ~LOWAT_WRITTEN;
-			ioc3_ack(is, idd, hooks->intr_tx_explicit);
-			if (port->ip_notify & N_OUTPUT_LOWAT)
-				ioc3_cb_output_lowat(port);
-		}
-
-		/* Handle tx_mt.  Must come after tx_explicit.  */
-		else if (sio_ir & hooks->intr_tx_mt) {
-			/* If we are expecting a lowat notification
-			 * and we get to this point it probably means that for
-			 * some reason the tx_explicit didn't work as expected
-			 * (that can legitimately happen if the output buffer is
-			 * filled up in just the right way).
-			 * So send the notification now.
-			 */
-			if (port->ip_notify & N_OUTPUT_LOWAT) {
-				ioc3_cb_output_lowat(port);
-
-				/* We need to reload the sio_ir since the lowat
-				 * call may have caused another write to occur,
-				 * clearing the tx_mt condition.
-				 */
-				sio_ir = PENDING(card_ptr, idd);
-			}
-
-			/* If the tx_mt condition still persists even after the
-			 * lowat call, we've got some work to do.
-			 */
-			if (sio_ir & hooks->intr_tx_mt) {
-				/* If we are not currently expecting DMA input,
-				 * and the transmitter has just gone idle,
-				 * there is no longer any reason for DMA, so
-				 * disable it.
-				 */
-				if (!(port->ip_notify
-				      & (N_DATA_READY | N_DDCD))) {
-					BUG_ON(!(port->ip_sscr
-						 & SSCR_DMA_EN));
-					port->ip_sscr &= ~SSCR_DMA_EN;
-					writel(port->ip_sscr,
-					       &port->ip_serial_regs->sscr);
-				}
-				/* Prevent infinite tx_mt interrupt */
-				card_ptr->ic_enable &= ~hooks->intr_tx_mt;
-			}
-		}
-		sio_ir = PENDING(card_ptr, idd);
-
-		/* if the read was aborted and only hooks->intr_rx_high,
-		 * clear hooks->intr_rx_high, so we do not loop forever.
-		 */
-
-		if (rx_high_rd_aborted && (sio_ir == hooks->intr_rx_high)) {
-			sio_ir &= ~hooks->intr_rx_high;
-		}
-	} while (sio_ir & hooks->intr_all);
-
-	spin_unlock_irqrestore(&port->ip_lock, flags);
-	ioc3_enable(is, idd, card_ptr->ic_enable);
-	return 0;
-}
-
-/**
- * ioc3uart_intr - field all serial interrupts
- * @is : submodule
- * @idd: driver data
- * @pending: interrupts to handle
- *
- */
-
-static int ioc3uart_intr(struct ioc3_submodule *is,
-			struct ioc3_driver_data *idd,
-			unsigned int pending)
-{
-	int ret = 0;
-
-	/*
-	 * The upper level interrupt handler sends interrupts for both ports
-	 * here. So we need to call for each port with its interrupts.
-	 */
-
-	if (pending & SIO_IR_SA)
-		ret |= ioc3uart_intr_one(is, idd, pending & SIO_IR_SA);
-	if (pending & SIO_IR_SB)
-		ret |= ioc3uart_intr_one(is, idd, pending & SIO_IR_SB);
-
-	return ret;
-}
-
-/**
- * ic3_type
- * @port: Port to operate with (we ignore since we only have one port)
- *
- */
-static const char *ic3_type(struct uart_port *the_port)
-{
-	if (IS_RS232(the_port->line))
-		return "SGI IOC3 Serial [rs232]";
-	else
-		return "SGI IOC3 Serial [rs422]";
-}
-
-/**
- * ic3_tx_empty - Is the transmitter empty?
- * @port: Port to operate on
- *
- */
-static unsigned int ic3_tx_empty(struct uart_port *the_port)
-{
-	unsigned int ret = 0;
-	struct ioc3_port *port = get_ioc3_port(the_port);
-
-	if (readl(&port->ip_serial_regs->shadow) & SHADOW_TEMT)
-		ret = TIOCSER_TEMT;
-	return ret;
-}
-
-/**
- * ic3_stop_tx - stop the transmitter
- * @port: Port to operate on
- *
- */
-static void ic3_stop_tx(struct uart_port *the_port)
-{
-	struct ioc3_port *port = get_ioc3_port(the_port);
-
-	if (port)
-		set_notification(port, N_OUTPUT_LOWAT, 0);
-}
-
-/**
- * ic3_stop_rx - stop the receiver
- * @port: Port to operate on
- *
- */
-static void ic3_stop_rx(struct uart_port *the_port)
-{
-	struct ioc3_port *port = get_ioc3_port(the_port);
-
-	if (port)
-		port->ip_flags &= ~INPUT_ENABLE;
-}
-
-/**
- * null_void_function
- * @port: Port to operate on
- *
- */
-static void null_void_function(struct uart_port *the_port)
-{
-}
-
-/**
- * ic3_shutdown - shut down the port - free irq and disable
- * @port: port to shut down
- *
- */
-static void ic3_shutdown(struct uart_port *the_port)
-{
-	unsigned long port_flags;
-	struct ioc3_port *port;
-	struct uart_state *state;
-
-	port = get_ioc3_port(the_port);
-	if (!port)
-		return;
-
-	state = the_port->state;
-	wake_up_interruptible(&state->port.delta_msr_wait);
-
-	spin_lock_irqsave(&the_port->lock, port_flags);
-	set_notification(port, N_ALL, 0);
-	spin_unlock_irqrestore(&the_port->lock, port_flags);
-}
-
-/**
- * ic3_set_mctrl - set control lines (dtr, rts, etc)
- * @port: Port to operate on
- * @mctrl: Lines to set/unset
- *
- */
-static void ic3_set_mctrl(struct uart_port *the_port, unsigned int mctrl)
-{
-	unsigned char mcr = 0;
-
-	if (mctrl & TIOCM_RTS)
-		mcr |= UART_MCR_RTS;
-	if (mctrl & TIOCM_DTR)
-		mcr |= UART_MCR_DTR;
-	if (mctrl & TIOCM_OUT1)
-		mcr |= UART_MCR_OUT1;
-	if (mctrl & TIOCM_OUT2)
-		mcr |= UART_MCR_OUT2;
-	if (mctrl & TIOCM_LOOP)
-		mcr |= UART_MCR_LOOP;
-
-	set_mcr(the_port, mcr, SHADOW_DTR);
-}
-
-/**
- * ic3_get_mctrl - get control line info
- * @port: port to operate on
- *
- */
-static unsigned int ic3_get_mctrl(struct uart_port *the_port)
-{
-	struct ioc3_port *port = get_ioc3_port(the_port);
-	uint32_t shadow;
-	unsigned int ret = 0;
-
-	if (!port)
-		return 0;
-
-	shadow = readl(&port->ip_serial_regs->shadow);
-	if (shadow & SHADOW_DCD)
-		ret |= TIOCM_CD;
-	if (shadow & SHADOW_DR)
-		ret |= TIOCM_DSR;
-	if (shadow & SHADOW_CTS)
-		ret |= TIOCM_CTS;
-	return ret;
-}
-
-/**
- * ic3_start_tx - Start transmitter. Called with the_port->lock
- * @port: Port to operate on
- *
- */
-static void ic3_start_tx(struct uart_port *the_port)
-{
-	struct ioc3_port *port = get_ioc3_port(the_port);
-
-	if (port) {
-		set_notification(port, N_OUTPUT_LOWAT, 1);
-		enable_intrs(port, port->ip_hooks->intr_tx_mt);
-	}
-}
-
-/**
- * ic3_break_ctl - handle breaks
- * @port: Port to operate on
- * @break_state: Break state
- *
- */
-static void ic3_break_ctl(struct uart_port *the_port, int break_state)
-{
-}
-
-/**
- * ic3_startup - Start up the serial port - always return 0 (We're always on)
- * @port: Port to operate on
- *
- */
-static int ic3_startup(struct uart_port *the_port)
-{
-	int retval;
-	struct ioc3_port *port;
-	struct ioc3_card *card_ptr;
-	unsigned long port_flags;
-
-	if (!the_port) {
-		NOT_PROGRESS();
-		return -ENODEV;
-	}
-	port = get_ioc3_port(the_port);
-	if (!port) {
-		NOT_PROGRESS();
-		return -ENODEV;
-	}
-	card_ptr = port->ip_card;
-	port->ip_port = the_port;
-
-	if (!card_ptr) {
-		NOT_PROGRESS();
-		return -ENODEV;
-	}
-
-	/* Start up the serial port */
-	spin_lock_irqsave(&the_port->lock, port_flags);
-	retval = ic3_startup_local(the_port);
-	spin_unlock_irqrestore(&the_port->lock, port_flags);
-	return retval;
-}
-
-/**
- * ic3_set_termios - set termios stuff
- * @port: port to operate on
- * @termios: New settings
- * @termios: Old
- *
- */
-static void
-ic3_set_termios(struct uart_port *the_port,
-		struct ktermios *termios, struct ktermios *old_termios)
-{
-	unsigned long port_flags;
-
-	spin_lock_irqsave(&the_port->lock, port_flags);
-	ioc3_change_speed(the_port, termios, old_termios);
-	spin_unlock_irqrestore(&the_port->lock, port_flags);
-}
-
-/**
- * ic3_request_port - allocate resources for port - no op....
- * @port: port to operate on
- *
- */
-static int ic3_request_port(struct uart_port *port)
-{
-	return 0;
-}
-
-/* Associate the uart functions above - given to serial core */
-static const struct uart_ops ioc3_ops = {
-	.tx_empty = ic3_tx_empty,
-	.set_mctrl = ic3_set_mctrl,
-	.get_mctrl = ic3_get_mctrl,
-	.stop_tx = ic3_stop_tx,
-	.start_tx = ic3_start_tx,
-	.stop_rx = ic3_stop_rx,
-	.break_ctl = ic3_break_ctl,
-	.startup = ic3_startup,
-	.shutdown = ic3_shutdown,
-	.set_termios = ic3_set_termios,
-	.type = ic3_type,
-	.release_port = null_void_function,
-	.request_port = ic3_request_port,
-};
-
-/*
- * Boot-time initialization code
- */
-
-static struct uart_driver ioc3_uart = {
-	.owner = THIS_MODULE,
-	.driver_name = "ioc3_serial",
-	.dev_name = DEVICE_NAME,
-	.major = DEVICE_MAJOR,
-	.minor = DEVICE_MINOR,
-	.nr = MAX_LOGICAL_PORTS
-};
-
-/**
- * ioc3_serial_core_attach - register with serial core
- *		This is done during pci probing
- * @is: submodule struct for this
- * @idd: handle for this card
- */
-static inline int ioc3_serial_core_attach( struct ioc3_submodule *is,
-				struct ioc3_driver_data *idd)
-{
-	struct ioc3_port *port;
-	struct uart_port *the_port;
-	struct ioc3_card *card_ptr = idd->data[is->id];
-	int ii, phys_port;
-	struct pci_dev *pdev = idd->pdev;
-
-	DPRINT_CONFIG(("%s: attach pdev 0x%p - card_ptr 0x%p\n",
-		       __func__, pdev, (void *)card_ptr));
-
-	if (!card_ptr)
-		return -ENODEV;
-
-	/* once around for each logical port on this card */
-	for (ii = 0; ii < LOGICAL_PORTS_PER_CARD; ii++) {
-		phys_port = GET_PHYSICAL_PORT(ii);
-		the_port = &card_ptr->ic_port[phys_port].
-				icp_uart_port[GET_LOGICAL_PORT(ii)];
-		port = card_ptr->ic_port[phys_port].icp_port;
-		port->ip_port = the_port;
-
-		DPRINT_CONFIG(("%s: attach the_port 0x%p / port 0x%p [%d/%d]\n",
-			__func__, (void *)the_port, (void *)port,
-				phys_port, ii));
-
-		/* membase, iobase and mapbase just need to be non-0 */
-		the_port->membase = (unsigned char __iomem *)1;
-		the_port->iobase = (pdev->bus->number << 16) |  ii;
-		the_port->line = (Num_of_ioc3_cards << 2) | ii;
-		the_port->mapbase = 1;
-		the_port->type = PORT_16550A;
-		the_port->fifosize = FIFO_SIZE;
-		the_port->ops = &ioc3_ops;
-		the_port->irq = idd->irq_io;
-		the_port->dev = &pdev->dev;
-
-		if (uart_add_one_port(&ioc3_uart, the_port) < 0) {
-			printk(KERN_WARNING
-		          "%s: unable to add port %d bus %d\n",
-			       __func__, the_port->line, pdev->bus->number);
-		} else {
-			DPRINT_CONFIG(("IOC3 serial port %d irq %d bus %d\n",
-		          the_port->line, the_port->irq, pdev->bus->number));
-		}
-
-		/* all ports are rs232 for now */
-		if (IS_PHYSICAL_PORT(ii))
-			ioc3_set_proto(port, PROTO_RS232);
-	}
-	return 0;
-}
-
-/**
- * ioc3uart_remove - register detach function
- * @is: submodule struct for this submodule
- * @idd: ioc3 driver data for this submodule
- */
-
-static int ioc3uart_remove(struct ioc3_submodule *is,
-			struct ioc3_driver_data *idd)
-{
-	struct ioc3_card *card_ptr = idd->data[is->id];
-	struct uart_port *the_port;
-	struct ioc3_port *port;
-	int ii;
-
-	if (card_ptr) {
-		for (ii = 0; ii < LOGICAL_PORTS_PER_CARD; ii++) {
-			the_port = &card_ptr->ic_port[GET_PHYSICAL_PORT(ii)].
-					icp_uart_port[GET_LOGICAL_PORT(ii)];
-			if (the_port)
-				uart_remove_one_port(&ioc3_uart, the_port);
-			port = card_ptr->ic_port[GET_PHYSICAL_PORT(ii)].icp_port;
-			if (port && IS_PHYSICAL_PORT(ii)
-					&& (GET_PHYSICAL_PORT(ii) == 0)) {
-				pci_free_consistent(port->ip_idd->pdev,
-					TOTAL_RING_BUF_SIZE,
-					(void *)port->ip_cpu_ringbuf,
-					port->ip_dma_ringbuf);
-				kfree(port);
-				card_ptr->ic_port[GET_PHYSICAL_PORT(ii)].
-							icp_port = NULL;
-			}
-		}
-		kfree(card_ptr);
-		idd->data[is->id] = NULL;
-	}
-	return 0;
-}
-
-/**
- * ioc3uart_probe - card probe function called from shim driver
- * @is: submodule struct for this submodule
- * @idd: ioc3 driver data for this card
- */
-
-static int
-ioc3uart_probe(struct ioc3_submodule *is, struct ioc3_driver_data *idd)
-{
-	struct pci_dev *pdev = idd->pdev;
-	struct ioc3_card *card_ptr;
-	int ret = 0;
-	struct ioc3_port *port;
-	struct ioc3_port *ports[PORTS_PER_CARD];
-	int phys_port;
-	int cnt;
-
-	DPRINT_CONFIG(("%s (0x%p, 0x%p)\n", __func__, is, idd));
-
-	card_ptr = kzalloc(sizeof(struct ioc3_card), GFP_KERNEL);
-	if (!card_ptr) {
-		printk(KERN_WARNING "ioc3_attach_one"
-		       ": unable to get memory for the IOC3\n");
-		return -ENOMEM;
-	}
-	idd->data[is->id] = card_ptr;
-	Submodule_slot = is->id;
-
-	writel(((UARTA_BASE >> 3) << SIO_CR_SER_A_BASE_SHIFT) |
-		((UARTB_BASE >> 3) << SIO_CR_SER_B_BASE_SHIFT) |
-		(0xf << SIO_CR_CMD_PULSE_SHIFT), &idd->vma->sio_cr);
-
-	pci_write_config_dword(pdev, PCI_LAT, 0xff00);
-
-	/* Enable serial port mode select generic PIO pins as outputs */
-	ioc3_gpcr_set(idd, GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL);
-
-	/* Create port structures for each port */
-	for (phys_port = 0; phys_port < PORTS_PER_CARD; phys_port++) {
-		port = kzalloc(sizeof(struct ioc3_port), GFP_KERNEL);
-		if (!port) {
-			printk(KERN_WARNING
-			       "IOC3 serial memory not available for port\n");
-			ret = -ENOMEM;
-			goto out4;
-		}
-		spin_lock_init(&port->ip_lock);
-
-		/* we need to remember the previous ones, to point back to
-		 * them farther down - setting up the ring buffers.
-		 */
-		ports[phys_port] = port;
-
-		/* init to something useful */
-		card_ptr->ic_port[phys_port].icp_port = port;
-		port->ip_is = is;
-		port->ip_idd = idd;
-		port->ip_baud = 9600;
-		port->ip_card = card_ptr;
-		port->ip_hooks = &hooks_array[phys_port];
-
-		/* Setup each port */
-		if (phys_port == 0) {
-			port->ip_serial_regs = &idd->vma->port_a;
-			port->ip_uart_regs = &idd->vma->sregs.uarta;
-
-			DPRINT_CONFIG(("%s : Port A ip_serial_regs 0x%p "
-				       "ip_uart_regs 0x%p\n",
-				       __func__,
-				       (void *)port->ip_serial_regs,
-				       (void *)port->ip_uart_regs));
-
-			/* setup ring buffers */
-			port->ip_cpu_ringbuf = pci_alloc_consistent(pdev,
-				TOTAL_RING_BUF_SIZE, &port->ip_dma_ringbuf);
-
-			BUG_ON(!((((int64_t) port->ip_dma_ringbuf) &
-				  (TOTAL_RING_BUF_SIZE - 1)) == 0));
-			port->ip_inring = RING(port, RX_A);
-			port->ip_outring = RING(port, TX_A);
-			DPRINT_CONFIG(("%s : Port A ip_cpu_ringbuf 0x%p "
-				       "ip_dma_ringbuf 0x%p, ip_inring 0x%p "
-					"ip_outring 0x%p\n",
-				       __func__,
-				       (void *)port->ip_cpu_ringbuf,
-				       (void *)port->ip_dma_ringbuf,
-				       (void *)port->ip_inring,
-				       (void *)port->ip_outring));
-		}
-		else {
-			port->ip_serial_regs = &idd->vma->port_b;
-			port->ip_uart_regs = &idd->vma->sregs.uartb;
-
-			DPRINT_CONFIG(("%s : Port B ip_serial_regs 0x%p "
-				       "ip_uart_regs 0x%p\n",
-				       __func__,
-				       (void *)port->ip_serial_regs,
-				       (void *)port->ip_uart_regs));
-
-			/* share the ring buffers */
-			port->ip_dma_ringbuf =
-			    ports[phys_port - 1]->ip_dma_ringbuf;
-			port->ip_cpu_ringbuf =
-			    ports[phys_port - 1]->ip_cpu_ringbuf;
-			port->ip_inring = RING(port, RX_B);
-			port->ip_outring = RING(port, TX_B);
-			DPRINT_CONFIG(("%s : Port B ip_cpu_ringbuf 0x%p "
-				       "ip_dma_ringbuf 0x%p, ip_inring 0x%p "
-					"ip_outring 0x%p\n",
-				       __func__,
-				       (void *)port->ip_cpu_ringbuf,
-				       (void *)port->ip_dma_ringbuf,
-				       (void *)port->ip_inring,
-				       (void *)port->ip_outring));
-		}
-
-		DPRINT_CONFIG(("%s : port %d [addr 0x%p] card_ptr 0x%p",
-			       __func__,
-			       phys_port, (void *)port, (void *)card_ptr));
-		DPRINT_CONFIG((" ip_serial_regs 0x%p ip_uart_regs 0x%p\n",
-			       (void *)port->ip_serial_regs,
-			       (void *)port->ip_uart_regs));
-
-		/* Initialize the hardware for IOC3 */
-		port_init(port);
-
-		DPRINT_CONFIG(("%s: phys_port %d port 0x%p inring 0x%p "
-			       "outring 0x%p\n",
-			       __func__,
-			       phys_port, (void *)port,
-			       (void *)port->ip_inring,
-			       (void *)port->ip_outring));
-
-	}
-
-	/* register port with the serial core */
-
-	ret = ioc3_serial_core_attach(is, idd);
-	if (ret)
-		goto out4;
-
-	Num_of_ioc3_cards++;
-
-	return ret;
-
-	/* error exits that give back resources */
-out4:
-	for (cnt = 0; cnt < phys_port; cnt++)
-		kfree(ports[cnt]);
-
-	kfree(card_ptr);
-	return ret;
-}
-
-static struct ioc3_submodule ioc3uart_ops = {
-	.name = "IOC3uart",
-	.probe = ioc3uart_probe,
-	.remove = ioc3uart_remove,
-	/* call .intr for both ports initially */
-	.irq_mask = SIO_IR_SA | SIO_IR_SB,
-	.intr = ioc3uart_intr,
-	.owner = THIS_MODULE,
-};
-
-/**
- * ioc3_detect - module init called,
- */
-static int __init ioc3uart_init(void)
-{
-	int ret;
-
-	/* register with serial core */
-	if ((ret = uart_register_driver(&ioc3_uart)) < 0) {
-		printk(KERN_WARNING
-		       "%s: Couldn't register IOC3 uart serial driver\n",
-		       __func__);
-		return ret;
-	}
-	ret = ioc3_register_submodule(&ioc3uart_ops);
-	if (ret)
-		uart_unregister_driver(&ioc3_uart);
-	return ret;
-}
-
-static void __exit ioc3uart_exit(void)
-{
-	ioc3_unregister_submodule(&ioc3uart_ops);
-	uart_unregister_driver(&ioc3_uart);
-}
-
-module_init(ioc3uart_init);
-module_exit(ioc3uart_exit);
-
-MODULE_AUTHOR("Pat Gefre - Silicon Graphics Inc. (SGI) <pfg@sgi.com>");
-MODULE_DESCRIPTION("Serial PCI driver module for SGI IOC3 card");
-MODULE_LICENSE("GPL");
diff --git a/drivers/tty/serial/ioc4_serial.c b/drivers/tty/serial/ioc4_serial.c
deleted file mode 100644
index db5b979e5a0c..000000000000
--- a/drivers/tty/serial/ioc4_serial.c
+++ /dev/null
@@ -1,2955 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2003-2006 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-
-/*
- * This file contains a module version of the ioc4 serial driver. This
- * includes all the support functions needed (support functions, etc.)
- * and the serial driver itself.
- */
-#include <linux/errno.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/circ_buf.h>
-#include <linux/serial_reg.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/ioc4.h>
-#include <linux/serial_core.h>
-#include <linux/slab.h>
-
-/*
- * interesting things about the ioc4
- */
-
-#define IOC4_NUM_SERIAL_PORTS	4	/* max ports per card */
-#define IOC4_NUM_CARDS		8	/* max cards per partition */
-
-#define	GET_SIO_IR(_n)	(_n == 0) ? (IOC4_SIO_IR_S0) : \
-				(_n == 1) ? (IOC4_SIO_IR_S1) : \
-				(_n == 2) ? (IOC4_SIO_IR_S2) : \
-				(IOC4_SIO_IR_S3)
-
-#define	GET_OTHER_IR(_n)  (_n == 0) ? (IOC4_OTHER_IR_S0_MEMERR) : \
-				(_n == 1) ? (IOC4_OTHER_IR_S1_MEMERR) : \
-				(_n == 2) ? (IOC4_OTHER_IR_S2_MEMERR) : \
-				(IOC4_OTHER_IR_S3_MEMERR)
-
-
-/*
- * All IOC4 registers are 32 bits wide.
- */
-
-/*
- * PCI Memory Space Map
- */
-#define IOC4_PCI_ERR_ADDR_L     0x000	/* Low Error Address */
-#define IOC4_PCI_ERR_ADDR_VLD	        (0x1 << 0)
-#define IOC4_PCI_ERR_ADDR_MST_ID_MSK    (0xf << 1)
-#define IOC4_PCI_ERR_ADDR_MST_NUM_MSK   (0xe << 1)
-#define IOC4_PCI_ERR_ADDR_MST_TYP_MSK   (0x1 << 1)
-#define IOC4_PCI_ERR_ADDR_MUL_ERR       (0x1 << 5)
-#define IOC4_PCI_ERR_ADDR_ADDR_MSK      (0x3ffffff << 6)
-
-/* Interrupt types */
-#define	IOC4_SIO_INTR_TYPE	0
-#define	IOC4_OTHER_INTR_TYPE	1
-#define	IOC4_NUM_INTR_TYPES	2
-
-/* Bitmasks for IOC4_SIO_IR, IOC4_SIO_IEC, and IOC4_SIO_IES  */
-#define IOC4_SIO_IR_S0_TX_MT	   0x00000001	/* Serial port 0 TX empty */
-#define IOC4_SIO_IR_S0_RX_FULL	   0x00000002	/* Port 0 RX buf full */
-#define IOC4_SIO_IR_S0_RX_HIGH	   0x00000004	/* Port 0 RX hiwat */
-#define IOC4_SIO_IR_S0_RX_TIMER	   0x00000008	/* Port 0 RX timeout */
-#define IOC4_SIO_IR_S0_DELTA_DCD   0x00000010	/* Port 0 delta DCD */
-#define IOC4_SIO_IR_S0_DELTA_CTS   0x00000020	/* Port 0 delta CTS */
-#define IOC4_SIO_IR_S0_INT	   0x00000040	/* Port 0 pass-thru intr */
-#define IOC4_SIO_IR_S0_TX_EXPLICIT 0x00000080	/* Port 0 explicit TX thru */
-#define IOC4_SIO_IR_S1_TX_MT	   0x00000100	/* Serial port 1 */
-#define IOC4_SIO_IR_S1_RX_FULL	   0x00000200	/* */
-#define IOC4_SIO_IR_S1_RX_HIGH	   0x00000400	/* */
-#define IOC4_SIO_IR_S1_RX_TIMER	   0x00000800	/* */
-#define IOC4_SIO_IR_S1_DELTA_DCD   0x00001000	/* */
-#define IOC4_SIO_IR_S1_DELTA_CTS   0x00002000	/* */
-#define IOC4_SIO_IR_S1_INT	   0x00004000	/* */
-#define IOC4_SIO_IR_S1_TX_EXPLICIT 0x00008000	/* */
-#define IOC4_SIO_IR_S2_TX_MT	   0x00010000	/* Serial port 2 */
-#define IOC4_SIO_IR_S2_RX_FULL	   0x00020000	/* */
-#define IOC4_SIO_IR_S2_RX_HIGH	   0x00040000	/* */
-#define IOC4_SIO_IR_S2_RX_TIMER	   0x00080000	/* */
-#define IOC4_SIO_IR_S2_DELTA_DCD   0x00100000	/* */
-#define IOC4_SIO_IR_S2_DELTA_CTS   0x00200000	/* */
-#define IOC4_SIO_IR_S2_INT	   0x00400000	/* */
-#define IOC4_SIO_IR_S2_TX_EXPLICIT 0x00800000	/* */
-#define IOC4_SIO_IR_S3_TX_MT	   0x01000000	/* Serial port 3 */
-#define IOC4_SIO_IR_S3_RX_FULL	   0x02000000	/* */
-#define IOC4_SIO_IR_S3_RX_HIGH	   0x04000000	/* */
-#define IOC4_SIO_IR_S3_RX_TIMER	   0x08000000	/* */
-#define IOC4_SIO_IR_S3_DELTA_DCD   0x10000000	/* */
-#define IOC4_SIO_IR_S3_DELTA_CTS   0x20000000	/* */
-#define IOC4_SIO_IR_S3_INT	   0x40000000	/* */
-#define IOC4_SIO_IR_S3_TX_EXPLICIT 0x80000000	/* */
-
-/* Per device interrupt masks */
-#define IOC4_SIO_IR_S0		(IOC4_SIO_IR_S0_TX_MT | \
-				 IOC4_SIO_IR_S0_RX_FULL | \
-				 IOC4_SIO_IR_S0_RX_HIGH | \
-				 IOC4_SIO_IR_S0_RX_TIMER | \
-				 IOC4_SIO_IR_S0_DELTA_DCD | \
-				 IOC4_SIO_IR_S0_DELTA_CTS | \
-				 IOC4_SIO_IR_S0_INT | \
-				 IOC4_SIO_IR_S0_TX_EXPLICIT)
-#define IOC4_SIO_IR_S1		(IOC4_SIO_IR_S1_TX_MT | \
-				 IOC4_SIO_IR_S1_RX_FULL | \
-				 IOC4_SIO_IR_S1_RX_HIGH | \
-				 IOC4_SIO_IR_S1_RX_TIMER | \
-				 IOC4_SIO_IR_S1_DELTA_DCD | \
-				 IOC4_SIO_IR_S1_DELTA_CTS | \
-				 IOC4_SIO_IR_S1_INT | \
-				 IOC4_SIO_IR_S1_TX_EXPLICIT)
-#define IOC4_SIO_IR_S2		(IOC4_SIO_IR_S2_TX_MT | \
-				 IOC4_SIO_IR_S2_RX_FULL | \
-				 IOC4_SIO_IR_S2_RX_HIGH | \
-				 IOC4_SIO_IR_S2_RX_TIMER | \
-				 IOC4_SIO_IR_S2_DELTA_DCD | \
-				 IOC4_SIO_IR_S2_DELTA_CTS | \
-				 IOC4_SIO_IR_S2_INT | \
-				 IOC4_SIO_IR_S2_TX_EXPLICIT)
-#define IOC4_SIO_IR_S3		(IOC4_SIO_IR_S3_TX_MT | \
-				 IOC4_SIO_IR_S3_RX_FULL | \
-				 IOC4_SIO_IR_S3_RX_HIGH | \
-				 IOC4_SIO_IR_S3_RX_TIMER | \
-				 IOC4_SIO_IR_S3_DELTA_DCD | \
-				 IOC4_SIO_IR_S3_DELTA_CTS | \
-				 IOC4_SIO_IR_S3_INT | \
-				 IOC4_SIO_IR_S3_TX_EXPLICIT)
-
-/* Bitmasks for IOC4_OTHER_IR, IOC4_OTHER_IEC, and IOC4_OTHER_IES  */
-#define IOC4_OTHER_IR_ATA_INT		0x00000001  /* ATAPI intr pass-thru */
-#define IOC4_OTHER_IR_ATA_MEMERR	0x00000002  /* ATAPI DMA PCI error */
-#define IOC4_OTHER_IR_S0_MEMERR		0x00000004  /* Port 0 PCI error */
-#define IOC4_OTHER_IR_S1_MEMERR		0x00000008  /* Port 1 PCI error */
-#define IOC4_OTHER_IR_S2_MEMERR		0x00000010  /* Port 2 PCI error */
-#define IOC4_OTHER_IR_S3_MEMERR		0x00000020  /* Port 3 PCI error */
-#define IOC4_OTHER_IR_KBD_INT		0x00000040  /* Keyboard/mouse */
-#define IOC4_OTHER_IR_RESERVED		0x007fff80  /* Reserved */
-#define IOC4_OTHER_IR_RT_INT		0x00800000  /* INT_OUT section output */
-#define IOC4_OTHER_IR_GEN_INT		0xff000000  /* Generic pins */
-
-#define IOC4_OTHER_IR_SER_MEMERR (IOC4_OTHER_IR_S0_MEMERR | IOC4_OTHER_IR_S1_MEMERR | \
-				  IOC4_OTHER_IR_S2_MEMERR | IOC4_OTHER_IR_S3_MEMERR)
-
-/* Bitmasks for IOC4_SIO_CR */
-#define IOC4_SIO_CR_CMD_PULSE_SHIFT              0  /* byte bus strobe shift */
-#define IOC4_SIO_CR_ARB_DIAG_TX0	0x00000000
-#define IOC4_SIO_CR_ARB_DIAG_RX0	0x00000010
-#define IOC4_SIO_CR_ARB_DIAG_TX1	0x00000020
-#define IOC4_SIO_CR_ARB_DIAG_RX1	0x00000030
-#define IOC4_SIO_CR_ARB_DIAG_TX2	0x00000040
-#define IOC4_SIO_CR_ARB_DIAG_RX2	0x00000050
-#define IOC4_SIO_CR_ARB_DIAG_TX3	0x00000060
-#define IOC4_SIO_CR_ARB_DIAG_RX3	0x00000070
-#define IOC4_SIO_CR_SIO_DIAG_IDLE	0x00000080  /* 0 -> active request among
-							   serial ports (ro) */
-/* Defs for some of the generic I/O pins */
-#define IOC4_GPCR_UART0_MODESEL	   0x10	/* Pin is output to port 0
-						   mode sel */
-#define IOC4_GPCR_UART1_MODESEL	   0x20	/* Pin is output to port 1
-						   mode sel */
-#define IOC4_GPCR_UART2_MODESEL	   0x40	/* Pin is output to port 2
-						   mode sel */
-#define IOC4_GPCR_UART3_MODESEL	   0x80	/* Pin is output to port 3
-						   mode sel */
-
-#define IOC4_GPPR_UART0_MODESEL_PIN   4	/* GIO pin controlling
-					   uart 0 mode select */
-#define IOC4_GPPR_UART1_MODESEL_PIN   5	/* GIO pin controlling
-					   uart 1 mode select */
-#define IOC4_GPPR_UART2_MODESEL_PIN   6	/* GIO pin controlling
-					   uart 2 mode select */
-#define IOC4_GPPR_UART3_MODESEL_PIN   7	/* GIO pin controlling
-					   uart 3 mode select */
-
-/* Bitmasks for serial RX status byte */
-#define IOC4_RXSB_OVERRUN       0x01	/* Char(s) lost */
-#define IOC4_RXSB_PAR_ERR	0x02	/* Parity error */
-#define IOC4_RXSB_FRAME_ERR	0x04	/* Framing error */
-#define IOC4_RXSB_BREAK	        0x08	/* Break character */
-#define IOC4_RXSB_CTS	        0x10	/* State of CTS */
-#define IOC4_RXSB_DCD	        0x20	/* State of DCD */
-#define IOC4_RXSB_MODEM_VALID   0x40	/* DCD, CTS, and OVERRUN are valid */
-#define IOC4_RXSB_DATA_VALID    0x80	/* Data byte, FRAME_ERR PAR_ERR
-					 * & BREAK valid */
-
-/* Bitmasks for serial TX control byte */
-#define IOC4_TXCB_INT_WHEN_DONE 0x20	/* Interrupt after this byte is sent */
-#define IOC4_TXCB_INVALID	0x00	/* Byte is invalid */
-#define IOC4_TXCB_VALID	        0x40	/* Byte is valid */
-#define IOC4_TXCB_MCR	        0x80	/* Data<7:0> to modem control reg */
-#define IOC4_TXCB_DELAY	        0xc0	/* Delay data<7:0> mSec */
-
-/* Bitmasks for IOC4_SBBR_L */
-#define IOC4_SBBR_L_SIZE	0x00000001  /* 0 == 1KB rings, 1 == 4KB rings */
-
-/* Bitmasks for IOC4_SSCR_<3:0> */
-#define IOC4_SSCR_RX_THRESHOLD  0x000001ff  /* Hiwater mark */
-#define IOC4_SSCR_TX_TIMER_BUSY 0x00010000  /* TX timer in progress */
-#define IOC4_SSCR_HFC_EN	0x00020000  /* Hardware flow control enabled */
-#define IOC4_SSCR_RX_RING_DCD   0x00040000  /* Post RX record on delta-DCD */
-#define IOC4_SSCR_RX_RING_CTS   0x00080000  /* Post RX record on delta-CTS */
-#define IOC4_SSCR_DIAG	        0x00200000  /* Bypass clock divider for sim */
-#define IOC4_SSCR_RX_DRAIN	0x08000000  /* Drain RX buffer to memory */
-#define IOC4_SSCR_DMA_EN	0x10000000  /* Enable ring buffer DMA */
-#define IOC4_SSCR_DMA_PAUSE	0x20000000  /* Pause DMA */
-#define IOC4_SSCR_PAUSE_STATE   0x40000000  /* Sets when PAUSE takes effect */
-#define IOC4_SSCR_RESET	        0x80000000  /* Reset DMA channels */
-
-/* All producer/consumer pointers are the same bitfield */
-#define IOC4_PROD_CONS_PTR_4K   0x00000ff8	/* For 4K buffers */
-#define IOC4_PROD_CONS_PTR_1K   0x000003f8	/* For 1K buffers */
-#define IOC4_PROD_CONS_PTR_OFF           3
-
-/* Bitmasks for IOC4_SRCIR_<3:0> */
-#define IOC4_SRCIR_ARM	        0x80000000	/* Arm RX timer */
-
-/* Bitmasks for IOC4_SHADOW_<3:0> */
-#define IOC4_SHADOW_DR	 0x00000001	/* Data ready */
-#define IOC4_SHADOW_OE	 0x00000002	/* Overrun error */
-#define IOC4_SHADOW_PE	 0x00000004	/* Parity error */
-#define IOC4_SHADOW_FE	 0x00000008	/* Framing error */
-#define IOC4_SHADOW_BI	 0x00000010	/* Break interrupt */
-#define IOC4_SHADOW_THRE 0x00000020	/* Xmit holding register empty */
-#define IOC4_SHADOW_TEMT 0x00000040	/* Xmit shift register empty */
-#define IOC4_SHADOW_RFCE 0x00000080	/* Char in RX fifo has an error */
-#define IOC4_SHADOW_DCTS 0x00010000	/* Delta clear to send */
-#define IOC4_SHADOW_DDCD 0x00080000	/* Delta data carrier detect */
-#define IOC4_SHADOW_CTS	 0x00100000	/* Clear to send */
-#define IOC4_SHADOW_DCD	 0x00800000	/* Data carrier detect */
-#define IOC4_SHADOW_DTR	 0x01000000	/* Data terminal ready */
-#define IOC4_SHADOW_RTS	 0x02000000	/* Request to send */
-#define IOC4_SHADOW_OUT1 0x04000000	/* 16550 OUT1 bit */
-#define IOC4_SHADOW_OUT2 0x08000000	/* 16550 OUT2 bit */
-#define IOC4_SHADOW_LOOP 0x10000000	/* Loopback enabled */
-
-/* Bitmasks for IOC4_SRTR_<3:0> */
-#define IOC4_SRTR_CNT	        0x00000fff	/* Reload value for RX timer */
-#define IOC4_SRTR_CNT_VAL	0x0fff0000	/* Current value of RX timer */
-#define IOC4_SRTR_CNT_VAL_SHIFT         16
-#define IOC4_SRTR_HZ                 16000	/* SRTR clock frequency */
-
-/* Serial port register map used for DMA and PIO serial I/O */
-struct ioc4_serialregs {
-	uint32_t sscr;
-	uint32_t stpir;
-	uint32_t stcir;
-	uint32_t srpir;
-	uint32_t srcir;
-	uint32_t srtr;
-	uint32_t shadow;
-};
-
-/* IOC4 UART register map */
-struct ioc4_uartregs {
-	char i4u_lcr;
-	union {
-		char iir;	/* read only */
-		char fcr;	/* write only */
-	} u3;
-	union {
-		char ier;	/* DLAB == 0 */
-		char dlm;	/* DLAB == 1 */
-	} u2;
-	union {
-		char rbr;	/* read only, DLAB == 0 */
-		char thr;	/* write only, DLAB == 0 */
-		char dll;	/* DLAB == 1 */
-	} u1;
-	char i4u_scr;
-	char i4u_msr;
-	char i4u_lsr;
-	char i4u_mcr;
-};
-
-/* short names */
-#define i4u_dll u1.dll
-#define i4u_ier u2.ier
-#define i4u_dlm u2.dlm
-#define i4u_fcr u3.fcr
-
-/* Serial port registers used for DMA serial I/O */
-struct ioc4_serial {
-	uint32_t sbbr01_l;
-	uint32_t sbbr01_h;
-	uint32_t sbbr23_l;
-	uint32_t sbbr23_h;
-
-	struct ioc4_serialregs port_0;
-	struct ioc4_serialregs port_1;
-	struct ioc4_serialregs port_2;
-	struct ioc4_serialregs port_3;
-	struct ioc4_uartregs uart_0;
-	struct ioc4_uartregs uart_1;
-	struct ioc4_uartregs uart_2;
-	struct ioc4_uartregs uart_3;
-};
-
-/* UART clock speed */
-#define IOC4_SER_XIN_CLK_66     66666667
-#define IOC4_SER_XIN_CLK_33     33333333
-
-#define IOC4_W_IES		0
-#define IOC4_W_IEC		1
-
-typedef void ioc4_intr_func_f(void *, uint32_t);
-typedef ioc4_intr_func_f *ioc4_intr_func_t;
-
-static unsigned int Num_of_ioc4_cards;
-
-/* defining this will get you LOTS of great debug info */
-//#define DEBUG_INTERRUPTS
-#define DPRINT_CONFIG(_x...)	;
-//#define DPRINT_CONFIG(_x...)	printk _x
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS	256
-
-/* number of characters we want to transmit to the lower level at a time */
-#define IOC4_MAX_CHARS	256
-#define IOC4_FIFO_CHARS	255
-
-/* Device name we're using */
-#define DEVICE_NAME_RS232  "ttyIOC"
-#define DEVICE_NAME_RS422  "ttyAIOC"
-#define DEVICE_MAJOR	   204
-#define DEVICE_MINOR_RS232 50
-#define DEVICE_MINOR_RS422 84
-
-
-/* register offsets */
-#define IOC4_SERIAL_OFFSET	0x300
-
-/* flags for next_char_state */
-#define NCS_BREAK	0x1
-#define NCS_PARITY	0x2
-#define NCS_FRAMING	0x4
-#define NCS_OVERRUN	0x8
-
-/* cause we need SOME parameters ... */
-#define MIN_BAUD_SUPPORTED	1200
-#define MAX_BAUD_SUPPORTED	115200
-
-/* protocol types supported */
-#define PROTO_RS232	3
-#define PROTO_RS422	7
-
-/* Notification types */
-#define N_DATA_READY	0x01
-#define N_OUTPUT_LOWAT	0x02
-#define N_BREAK		0x04
-#define N_PARITY_ERROR	0x08
-#define N_FRAMING_ERROR	0x10
-#define N_OVERRUN_ERROR	0x20
-#define N_DDCD		0x40
-#define N_DCTS		0x80
-
-#define N_ALL_INPUT	(N_DATA_READY | N_BREAK |			\
-			 N_PARITY_ERROR | N_FRAMING_ERROR |		\
-			 N_OVERRUN_ERROR | N_DDCD | N_DCTS)
-
-#define N_ALL_OUTPUT	N_OUTPUT_LOWAT
-
-#define N_ALL_ERRORS	(N_PARITY_ERROR | N_FRAMING_ERROR | N_OVERRUN_ERROR)
-
-#define N_ALL		(N_DATA_READY | N_OUTPUT_LOWAT | N_BREAK |	\
-			 N_PARITY_ERROR | N_FRAMING_ERROR |		\
-			 N_OVERRUN_ERROR | N_DDCD | N_DCTS)
-
-#define SER_DIVISOR(_x, clk)		(((clk) + (_x) * 8) / ((_x) * 16))
-#define DIVISOR_TO_BAUD(div, clk)	((clk) / 16 / (div))
-
-/* Some masks */
-#define LCR_MASK_BITS_CHAR	(UART_LCR_WLEN5 | UART_LCR_WLEN6 \
-					| UART_LCR_WLEN7 | UART_LCR_WLEN8)
-#define LCR_MASK_STOP_BITS	(UART_LCR_STOP)
-
-#define PENDING(_p)	(readl(&(_p)->ip_mem->sio_ir.raw) & _p->ip_ienb)
-#define READ_SIO_IR(_p) readl(&(_p)->ip_mem->sio_ir.raw)
-
-/* Default to 4k buffers */
-#ifdef IOC4_1K_BUFFERS
-#define RING_BUF_SIZE 1024
-#define IOC4_BUF_SIZE_BIT 0
-#define PROD_CONS_MASK IOC4_PROD_CONS_PTR_1K
-#else
-#define RING_BUF_SIZE 4096
-#define IOC4_BUF_SIZE_BIT IOC4_SBBR_L_SIZE
-#define PROD_CONS_MASK IOC4_PROD_CONS_PTR_4K
-#endif
-
-#define TOTAL_RING_BUF_SIZE (RING_BUF_SIZE * 4)
-
-/*
- * This is the entry saved by the driver - one per card
- */
-
-#define UART_PORT_MIN		0
-#define UART_PORT_RS232		UART_PORT_MIN
-#define UART_PORT_RS422		1
-#define UART_PORT_COUNT		2	/* one for each mode */
-
-struct ioc4_control {
-	int ic_irq;
-	struct {
-		/* uart ports are allocated here - 1 for rs232, 1 for rs422 */
-		struct uart_port icp_uart_port[UART_PORT_COUNT];
-		/* Handy reference material */
-		struct ioc4_port *icp_port;
-	} ic_port[IOC4_NUM_SERIAL_PORTS];
-	struct ioc4_soft *ic_soft;
-};
-
-/*
- * per-IOC4 data structure
- */
-#define MAX_IOC4_INTR_ENTS	(8 * sizeof(uint32_t))
-struct ioc4_soft {
-	struct ioc4_misc_regs __iomem *is_ioc4_misc_addr;
-	struct ioc4_serial __iomem *is_ioc4_serial_addr;
-
-	/* Each interrupt type has an entry in the array */
-	struct ioc4_intr_type {
-
-		/*
-		 * Each in-use entry in this array contains at least
-		 * one nonzero bit in sd_bits; no two entries in this
-		 * array have overlapping sd_bits values.
-		 */
-		struct ioc4_intr_info {
-			uint32_t sd_bits;
-			ioc4_intr_func_f *sd_intr;
-			void *sd_info;
-		} is_intr_info[MAX_IOC4_INTR_ENTS];
-
-		/* Number of entries active in the above array */
-		atomic_t is_num_intrs;
-	} is_intr_type[IOC4_NUM_INTR_TYPES];
-
-	/* is_ir_lock must be held while
-	 * modifying sio_ie values, so
-	 * we can be sure that sio_ie is
-	 * not changing when we read it
-	 * along with sio_ir.
-	 */
-	spinlock_t is_ir_lock;	/* SIO_IE[SC] mod lock */
-};
-
-/* Local port info for each IOC4 serial ports */
-struct ioc4_port {
-	struct uart_port *ip_port;	/* current active port ptr */
-	/* Ptrs for all ports */
-	struct uart_port *ip_all_ports[UART_PORT_COUNT];
-	/* Back ptrs for this port */
-	struct ioc4_control *ip_control;
-	struct pci_dev *ip_pdev;
-	struct ioc4_soft *ip_ioc4_soft;
-
-	/* pci mem addresses */
-	struct ioc4_misc_regs __iomem *ip_mem;
-	struct ioc4_serial __iomem *ip_serial;
-	struct ioc4_serialregs __iomem *ip_serial_regs;
-	struct ioc4_uartregs __iomem *ip_uart_regs;
-
-	/* Ring buffer page for this port */
-	dma_addr_t ip_dma_ringbuf;
-	/* vaddr of ring buffer */
-	struct ring_buffer *ip_cpu_ringbuf;
-
-	/* Rings for this port */
-	struct ring *ip_inring;
-	struct ring *ip_outring;
-
-	/* Hook to port specific values */
-	struct hooks *ip_hooks;
-
-	spinlock_t ip_lock;
-
-	/* Various rx/tx parameters */
-	int ip_baud;
-	int ip_tx_lowat;
-	int ip_rx_timeout;
-
-	/* Copy of notification bits */
-	int ip_notify;
-
-	/* Shadow copies of various registers so we don't need to PIO
-	 * read them constantly
-	 */
-	uint32_t ip_ienb;	/* Enabled interrupts */
-	uint32_t ip_sscr;
-	uint32_t ip_tx_prod;
-	uint32_t ip_rx_cons;
-	int ip_pci_bus_speed;
-	unsigned char ip_flags;
-};
-
-/* tx low water mark.  We need to notify the driver whenever tx is getting
- * close to empty so it can refill the tx buffer and keep things going.
- * Let's assume that if we interrupt 1 ms before the tx goes idle, we'll
- * have no trouble getting in more chars in time (I certainly hope so).
- */
-#define TX_LOWAT_LATENCY      1000
-#define TX_LOWAT_HZ          (1000000 / TX_LOWAT_LATENCY)
-#define TX_LOWAT_CHARS(baud) (baud / 10 / TX_LOWAT_HZ)
-
-/* Flags per port */
-#define INPUT_HIGH	0x01
-#define DCD_ON		0x02
-#define LOWAT_WRITTEN	0x04
-#define READ_ABORTED	0x08
-#define PORT_ACTIVE	0x10
-#define PORT_INACTIVE	0	/* This is the value when "off" */
-
-
-/* Since each port has different register offsets and bitmasks
- * for everything, we'll store those that we need in tables so we
- * don't have to be constantly checking the port we are dealing with.
- */
-struct hooks {
-	uint32_t intr_delta_dcd;
-	uint32_t intr_delta_cts;
-	uint32_t intr_tx_mt;
-	uint32_t intr_rx_timer;
-	uint32_t intr_rx_high;
-	uint32_t intr_tx_explicit;
-	uint32_t intr_dma_error;
-	uint32_t intr_clear;
-	uint32_t intr_all;
-	int rs422_select_pin;
-};
-
-static struct hooks hooks_array[IOC4_NUM_SERIAL_PORTS] = {
-	/* Values for port 0 */
-	{
-	 IOC4_SIO_IR_S0_DELTA_DCD, IOC4_SIO_IR_S0_DELTA_CTS,
-	 IOC4_SIO_IR_S0_TX_MT, IOC4_SIO_IR_S0_RX_TIMER,
-	 IOC4_SIO_IR_S0_RX_HIGH, IOC4_SIO_IR_S0_TX_EXPLICIT,
-	 IOC4_OTHER_IR_S0_MEMERR,
-	 (IOC4_SIO_IR_S0_TX_MT | IOC4_SIO_IR_S0_RX_FULL |
-	  IOC4_SIO_IR_S0_RX_HIGH | IOC4_SIO_IR_S0_RX_TIMER |
-	  IOC4_SIO_IR_S0_DELTA_DCD | IOC4_SIO_IR_S0_DELTA_CTS |
-	  IOC4_SIO_IR_S0_INT | IOC4_SIO_IR_S0_TX_EXPLICIT),
-	 IOC4_SIO_IR_S0, IOC4_GPPR_UART0_MODESEL_PIN,
-	 },
-
-	/* Values for port 1 */
-	{
-	 IOC4_SIO_IR_S1_DELTA_DCD, IOC4_SIO_IR_S1_DELTA_CTS,
-	 IOC4_SIO_IR_S1_TX_MT, IOC4_SIO_IR_S1_RX_TIMER,
-	 IOC4_SIO_IR_S1_RX_HIGH, IOC4_SIO_IR_S1_TX_EXPLICIT,
-	 IOC4_OTHER_IR_S1_MEMERR,
-	 (IOC4_SIO_IR_S1_TX_MT | IOC4_SIO_IR_S1_RX_FULL |
-	  IOC4_SIO_IR_S1_RX_HIGH | IOC4_SIO_IR_S1_RX_TIMER |
-	  IOC4_SIO_IR_S1_DELTA_DCD | IOC4_SIO_IR_S1_DELTA_CTS |
-	  IOC4_SIO_IR_S1_INT | IOC4_SIO_IR_S1_TX_EXPLICIT),
-	 IOC4_SIO_IR_S1, IOC4_GPPR_UART1_MODESEL_PIN,
-	 },
-
-	/* Values for port 2 */
-	{
-	 IOC4_SIO_IR_S2_DELTA_DCD, IOC4_SIO_IR_S2_DELTA_CTS,
-	 IOC4_SIO_IR_S2_TX_MT, IOC4_SIO_IR_S2_RX_TIMER,
-	 IOC4_SIO_IR_S2_RX_HIGH, IOC4_SIO_IR_S2_TX_EXPLICIT,
-	 IOC4_OTHER_IR_S2_MEMERR,
-	 (IOC4_SIO_IR_S2_TX_MT | IOC4_SIO_IR_S2_RX_FULL |
-	  IOC4_SIO_IR_S2_RX_HIGH | IOC4_SIO_IR_S2_RX_TIMER |
-	  IOC4_SIO_IR_S2_DELTA_DCD | IOC4_SIO_IR_S2_DELTA_CTS |
-	  IOC4_SIO_IR_S2_INT | IOC4_SIO_IR_S2_TX_EXPLICIT),
-	 IOC4_SIO_IR_S2, IOC4_GPPR_UART2_MODESEL_PIN,
-	 },
-
-	/* Values for port 3 */
-	{
-	 IOC4_SIO_IR_S3_DELTA_DCD, IOC4_SIO_IR_S3_DELTA_CTS,
-	 IOC4_SIO_IR_S3_TX_MT, IOC4_SIO_IR_S3_RX_TIMER,
-	 IOC4_SIO_IR_S3_RX_HIGH, IOC4_SIO_IR_S3_TX_EXPLICIT,
-	 IOC4_OTHER_IR_S3_MEMERR,
-	 (IOC4_SIO_IR_S3_TX_MT | IOC4_SIO_IR_S3_RX_FULL |
-	  IOC4_SIO_IR_S3_RX_HIGH | IOC4_SIO_IR_S3_RX_TIMER |
-	  IOC4_SIO_IR_S3_DELTA_DCD | IOC4_SIO_IR_S3_DELTA_CTS |
-	  IOC4_SIO_IR_S3_INT | IOC4_SIO_IR_S3_TX_EXPLICIT),
-	 IOC4_SIO_IR_S3, IOC4_GPPR_UART3_MODESEL_PIN,
-	 }
-};
-
-/* A ring buffer entry */
-struct ring_entry {
-	union {
-		struct {
-			uint32_t alldata;
-			uint32_t allsc;
-		} all;
-		struct {
-			char data[4];	/* data bytes */
-			char sc[4];	/* status/control */
-		} s;
-	} u;
-};
-
-/* Test the valid bits in any of the 4 sc chars using "allsc" member */
-#define RING_ANY_VALID \
-	((uint32_t)(IOC4_RXSB_MODEM_VALID | IOC4_RXSB_DATA_VALID) * 0x01010101)
-
-#define ring_sc     u.s.sc
-#define ring_data   u.s.data
-#define ring_allsc  u.all.allsc
-
-/* Number of entries per ring buffer. */
-#define ENTRIES_PER_RING (RING_BUF_SIZE / (int) sizeof(struct ring_entry))
-
-/* An individual ring */
-struct ring {
-	struct ring_entry entries[ENTRIES_PER_RING];
-};
-
-/* The whole enchilada */
-struct ring_buffer {
-	struct ring TX_0_OR_2;
-	struct ring RX_0_OR_2;
-	struct ring TX_1_OR_3;
-	struct ring RX_1_OR_3;
-};
-
-/* Get a ring from a port struct */
-#define RING(_p, _wh)	&(((struct ring_buffer *)((_p)->ip_cpu_ringbuf))->_wh)
-
-/* Infinite loop detection.
- */
-#define MAXITER 10000000
-
-/* Prototypes */
-static void receive_chars(struct uart_port *);
-static void handle_intr(void *arg, uint32_t sio_ir);
-
-/*
- * port_is_active - determines if this port is currently active
- * @port: ptr to soft struct for this port
- * @uart_port: uart port to test for
- */
-static inline int port_is_active(struct ioc4_port *port,
-		struct uart_port *uart_port)
-{
-	if (port) {
-		if ((port->ip_flags & PORT_ACTIVE)
-					&& (port->ip_port == uart_port))
-			return 1;
-	}
-	return 0;
-}
-
-
-/**
- * write_ireg - write the interrupt regs
- * @ioc4_soft: ptr to soft struct for this port
- * @val: value to write
- * @which: which register
- * @type: which ireg set
- */
-static inline void
-write_ireg(struct ioc4_soft *ioc4_soft, uint32_t val, int which, int type)
-{
-	struct ioc4_misc_regs __iomem *mem = ioc4_soft->is_ioc4_misc_addr;
-	unsigned long flags;
-
-	spin_lock_irqsave(&ioc4_soft->is_ir_lock, flags);
-
-	switch (type) {
-	case IOC4_SIO_INTR_TYPE:
-		switch (which) {
-		case IOC4_W_IES:
-			writel(val, &mem->sio_ies.raw);
-			break;
-
-		case IOC4_W_IEC:
-			writel(val, &mem->sio_iec.raw);
-			break;
-		}
-		break;
-
-	case IOC4_OTHER_INTR_TYPE:
-		switch (which) {
-		case IOC4_W_IES:
-			writel(val, &mem->other_ies.raw);
-			break;
-
-		case IOC4_W_IEC:
-			writel(val, &mem->other_iec.raw);
-			break;
-		}
-		break;
-
-	default:
-		break;
-	}
-	spin_unlock_irqrestore(&ioc4_soft->is_ir_lock, flags);
-}
-
-/**
- * set_baud - Baud rate setting code
- * @port: port to set
- * @baud: baud rate to use
- */
-static int set_baud(struct ioc4_port *port, int baud)
-{
-	int actual_baud;
-	int diff;
-	int lcr;
-	unsigned short divisor;
-	struct ioc4_uartregs __iomem *uart;
-
-	divisor = SER_DIVISOR(baud, port->ip_pci_bus_speed);
-	if (!divisor)
-		return 1;
-	actual_baud = DIVISOR_TO_BAUD(divisor, port->ip_pci_bus_speed);
-
-	diff = actual_baud - baud;
-	if (diff < 0)
-		diff = -diff;
-
-	/* If we're within 1%, we've found a match */
-	if (diff * 100 > actual_baud)
-		return 1;
-
-	uart = port->ip_uart_regs;
-	lcr = readb(&uart->i4u_lcr);
-	writeb(lcr | UART_LCR_DLAB, &uart->i4u_lcr);
-	writeb((unsigned char)divisor, &uart->i4u_dll);
-	writeb((unsigned char)(divisor >> 8), &uart->i4u_dlm);
-	writeb(lcr, &uart->i4u_lcr);
-	return 0;
-}
-
-
-/**
- * get_ioc4_port - given a uart port, return the control structure
- * @port: uart port
- * @set: set this port as current
- */
-static struct ioc4_port *get_ioc4_port(struct uart_port *the_port, int set)
-{
-	struct ioc4_driver_data *idd = dev_get_drvdata(the_port->dev);
-	struct ioc4_control *control = idd->idd_serial_data;
-	struct ioc4_port *port;
-	int port_num, port_type;
-
-	if (control) {
-		for ( port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS;
-							port_num++ ) {
-			port = control->ic_port[port_num].icp_port;
-			if (!port)
-				continue;
-			for (port_type = UART_PORT_MIN;
-						port_type < UART_PORT_COUNT;
-						port_type++) {
-				if (the_port == port->ip_all_ports
-							[port_type]) {
-					/* set local copy */
-					if (set) {
-						port->ip_port = the_port;
-					}
-					return port;
-				}
-			}
-		}
-	}
-	return NULL;
-}
-
-/* The IOC4 hardware provides no atomic way to determine if interrupts
- * are pending since two reads are required to do so.  The handler must
- * read the SIO_IR and the SIO_IES, and take the logical and of the
- * two.  When this value is zero, all interrupts have been serviced and
- * the handler may return.
- *
- * This has the unfortunate "hole" that, if some other CPU or
- * some other thread or some higher level interrupt manages to
- * modify SIO_IE between our reads of SIO_IR and SIO_IE, we may
- * think we have observed SIO_IR&SIO_IE==0 when in fact this
- * condition never really occurred.
- *
- * To solve this, we use a simple spinlock that must be held
- * whenever modifying SIO_IE; holding this lock while observing
- * both SIO_IR and SIO_IE guarantees that we do not falsely
- * conclude that no enabled interrupts are pending.
- */
-
-static inline uint32_t
-pending_intrs(struct ioc4_soft *soft, int type)
-{
-	struct ioc4_misc_regs __iomem *mem = soft->is_ioc4_misc_addr;
-	unsigned long flag;
-	uint32_t intrs = 0;
-
-	BUG_ON(!((type == IOC4_SIO_INTR_TYPE)
-	       || (type == IOC4_OTHER_INTR_TYPE)));
-
-	spin_lock_irqsave(&soft->is_ir_lock, flag);
-
-	switch (type) {
-	case IOC4_SIO_INTR_TYPE:
-		intrs = readl(&mem->sio_ir.raw) & readl(&mem->sio_ies.raw);
-		break;
-
-	case IOC4_OTHER_INTR_TYPE:
-		intrs = readl(&mem->other_ir.raw) & readl(&mem->other_ies.raw);
-
-		/* Don't process any ATA interrupte */
-		intrs &= ~(IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR);
-		break;
-
-	default:
-		break;
-	}
-	spin_unlock_irqrestore(&soft->is_ir_lock, flag);
-	return intrs;
-}
-
-/**
- * port_init - Initialize the sio and ioc4 hardware for a given port
- *			called per port from attach...
- * @port: port to initialize
- */
-static inline int port_init(struct ioc4_port *port)
-{
-	uint32_t sio_cr;
-	struct hooks *hooks = port->ip_hooks;
-	struct ioc4_uartregs __iomem *uart;
-
-	/* Idle the IOC4 serial interface */
-	writel(IOC4_SSCR_RESET, &port->ip_serial_regs->sscr);
-
-	/* Wait until any pending bus activity for this port has ceased */
-	do
-		sio_cr = readl(&port->ip_mem->sio_cr.raw);
-	while (!(sio_cr & IOC4_SIO_CR_SIO_DIAG_IDLE));
-
-	/* Finish reset sequence */
-	writel(0, &port->ip_serial_regs->sscr);
-
-	/* Once RESET is done, reload cached tx_prod and rx_cons values
-	 * and set rings to empty by making prod == cons
-	 */
-	port->ip_tx_prod = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK;
-	writel(port->ip_tx_prod, &port->ip_serial_regs->stpir);
-	port->ip_rx_cons = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK;
-	writel(port->ip_rx_cons | IOC4_SRCIR_ARM, &port->ip_serial_regs->srcir);
-
-	/* Disable interrupts for this 16550 */
-	uart = port->ip_uart_regs;
-	writeb(0, &uart->i4u_lcr);
-	writeb(0, &uart->i4u_ier);
-
-	/* Set the default baud */
-	set_baud(port, port->ip_baud);
-
-	/* Set line control to 8 bits no parity */
-	writeb(UART_LCR_WLEN8 | 0, &uart->i4u_lcr);
-					/* UART_LCR_STOP == 1 stop */
-
-	/* Enable the FIFOs */
-	writeb(UART_FCR_ENABLE_FIFO, &uart->i4u_fcr);
-	/* then reset 16550 FIFOs */
-	writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
-			&uart->i4u_fcr);
-
-	/* Clear modem control register */
-	writeb(0, &uart->i4u_mcr);
-
-	/* Clear deltas in modem status register */
-	readb(&uart->i4u_msr);
-
-	/* Only do this once per port pair */
-	if (port->ip_hooks == &hooks_array[0]
-			    || port->ip_hooks == &hooks_array[2]) {
-		unsigned long ring_pci_addr;
-		uint32_t __iomem *sbbr_l;
-		uint32_t __iomem *sbbr_h;
-
-		if (port->ip_hooks == &hooks_array[0]) {
-			sbbr_l = &port->ip_serial->sbbr01_l;
-			sbbr_h = &port->ip_serial->sbbr01_h;
-		} else {
-			sbbr_l = &port->ip_serial->sbbr23_l;
-			sbbr_h = &port->ip_serial->sbbr23_h;
-		}
-
-		ring_pci_addr = (unsigned long __iomem)port->ip_dma_ringbuf;
-		DPRINT_CONFIG(("%s: ring_pci_addr 0x%lx\n",
-					__func__, ring_pci_addr));
-
-		writel((unsigned int)((uint64_t)ring_pci_addr >> 32), sbbr_h);
-		writel((unsigned int)ring_pci_addr | IOC4_BUF_SIZE_BIT, sbbr_l);
-	}
-
-	/* Set the receive timeout value to 10 msec */
-	writel(IOC4_SRTR_HZ / 100, &port->ip_serial_regs->srtr);
-
-	/* Set rx threshold, enable DMA */
-	/* Set high water mark at 3/4 of full ring */
-	port->ip_sscr = (ENTRIES_PER_RING * 3 / 4);
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-
-	/* Disable and clear all serial related interrupt bits */
-	write_ireg(port->ip_ioc4_soft, hooks->intr_clear,
-		       IOC4_W_IEC, IOC4_SIO_INTR_TYPE);
-	port->ip_ienb &= ~hooks->intr_clear;
-	writel(hooks->intr_clear, &port->ip_mem->sio_ir.raw);
-	return 0;
-}
-
-/**
- * handle_dma_error_intr - service any pending DMA error interrupts for the
- *			given port - 2nd level called via sd_intr
- * @arg: handler arg
- * @other_ir: ioc4regs
- */
-static void handle_dma_error_intr(void *arg, uint32_t other_ir)
-{
-	struct ioc4_port *port = (struct ioc4_port *)arg;
-	struct hooks *hooks = port->ip_hooks;
-	unsigned long flags;
-
-	spin_lock_irqsave(&port->ip_lock, flags);
-
-	/* ACK the interrupt */
-	writel(hooks->intr_dma_error, &port->ip_mem->other_ir.raw);
-
-	if (readl(&port->ip_mem->pci_err_addr_l.raw) & IOC4_PCI_ERR_ADDR_VLD) {
-		printk(KERN_ERR
-			"PCI error address is 0x%llx, "
-				"master is serial port %c %s\n",
-		     (((uint64_t)readl(&port->ip_mem->pci_err_addr_h)
-							 << 32)
-				| readl(&port->ip_mem->pci_err_addr_l.raw))
-					& IOC4_PCI_ERR_ADDR_ADDR_MSK, '1' +
-		     ((char)(readl(&port->ip_mem->pci_err_addr_l.raw) &
-			     IOC4_PCI_ERR_ADDR_MST_NUM_MSK) >> 1),
-		     (readl(&port->ip_mem->pci_err_addr_l.raw)
-				& IOC4_PCI_ERR_ADDR_MST_TYP_MSK)
-				? "RX" : "TX");
-
-		if (readl(&port->ip_mem->pci_err_addr_l.raw)
-						& IOC4_PCI_ERR_ADDR_MUL_ERR) {
-			printk(KERN_ERR
-				"Multiple errors occurred\n");
-		}
-	}
-	spin_unlock_irqrestore(&port->ip_lock, flags);
-
-	/* Re-enable DMA error interrupts */
-	write_ireg(port->ip_ioc4_soft, hooks->intr_dma_error, IOC4_W_IES,
-						IOC4_OTHER_INTR_TYPE);
-}
-
-/**
- * intr_connect - interrupt connect function
- * @soft: soft struct for this card
- * @type: interrupt type
- * @intrbits: bit pattern to set
- * @intr: handler function
- * @info: handler arg
- */
-static void
-intr_connect(struct ioc4_soft *soft, int type,
-		  uint32_t intrbits, ioc4_intr_func_f * intr, void *info)
-{
-	int i;
-	struct ioc4_intr_info *intr_ptr;
-
-	BUG_ON(!((type == IOC4_SIO_INTR_TYPE)
-	       || (type == IOC4_OTHER_INTR_TYPE)));
-
-	i = atomic_inc_return(&soft-> is_intr_type[type].is_num_intrs) - 1;
-	BUG_ON(!(i < MAX_IOC4_INTR_ENTS || (printk("i %d\n", i), 0)));
-
-	/* Save off the lower level interrupt handler */
-	intr_ptr = &soft->is_intr_type[type].is_intr_info[i];
-	intr_ptr->sd_bits = intrbits;
-	intr_ptr->sd_intr = intr;
-	intr_ptr->sd_info = info;
-}
-
-/**
- * ioc4_intr - Top level IOC4 interrupt handler.
- * @irq: irq value
- * @arg: handler arg
- */
-
-static irqreturn_t ioc4_intr(int irq, void *arg)
-{
-	struct ioc4_soft *soft;
-	uint32_t this_ir, this_mir;
-	int xx, num_intrs = 0;
-	int intr_type;
-	int handled = 0;
-	struct ioc4_intr_info *intr_info;
-
-	soft = arg;
-	for (intr_type = 0; intr_type < IOC4_NUM_INTR_TYPES; intr_type++) {
-		num_intrs = (int)atomic_read(
-				&soft->is_intr_type[intr_type].is_num_intrs);
-
-		this_mir = this_ir = pending_intrs(soft, intr_type);
-
-		/* Farm out the interrupt to the various drivers depending on
-		 * which interrupt bits are set.
-		 */
-		for (xx = 0; xx < num_intrs; xx++) {
-			intr_info = &soft->is_intr_type[intr_type].is_intr_info[xx];
-			this_mir = this_ir & intr_info->sd_bits;
-			if (this_mir) {
-				/* Disable owned interrupts, call handler */
-				handled++;
-				write_ireg(soft, intr_info->sd_bits, IOC4_W_IEC,
-								intr_type);
-				intr_info->sd_intr(intr_info->sd_info, this_mir);
-				this_ir &= ~this_mir;
-			}
-		}
-	}
-#ifdef DEBUG_INTERRUPTS
-	{
-		struct ioc4_misc_regs __iomem *mem = soft->is_ioc4_misc_addr;
-		unsigned long flag;
-
-		spin_lock_irqsave(&soft->is_ir_lock, flag);
-		printk ("%s : %d : mem 0x%p sio_ir 0x%x sio_ies 0x%x "
-				"other_ir 0x%x other_ies 0x%x mask 0x%x\n",
-		     __func__, __LINE__,
-		     (void *)mem, readl(&mem->sio_ir.raw),
-		     readl(&mem->sio_ies.raw),
-		     readl(&mem->other_ir.raw),
-		     readl(&mem->other_ies.raw),
-		     IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR);
-		spin_unlock_irqrestore(&soft->is_ir_lock, flag);
-	}
-#endif
-	return handled ? IRQ_HANDLED : IRQ_NONE;
-}
-
-/**
- * ioc4_attach_local - Device initialization.
- *			Called at *_attach() time for each
- *			IOC4 with serial ports in the system.
- * @idd: Master module data for this IOC4
- */
-static inline int ioc4_attach_local(struct ioc4_driver_data *idd)
-{
-	struct ioc4_port *port;
-	struct ioc4_port *ports[IOC4_NUM_SERIAL_PORTS];
-	int port_number;
-	uint16_t ioc4_revid_min = 62;
-	uint16_t ioc4_revid;
-	struct pci_dev *pdev = idd->idd_pdev;
-	struct ioc4_control* control = idd->idd_serial_data;
-	struct ioc4_soft *soft = control->ic_soft;
-	void __iomem *ioc4_misc = idd->idd_misc_regs;
-	void __iomem *ioc4_serial = soft->is_ioc4_serial_addr;
-
-	/* IOC4 firmware must be at least rev 62 */
-	pci_read_config_word(pdev, PCI_COMMAND_SPECIAL, &ioc4_revid);
-
-	printk(KERN_INFO "IOC4 firmware revision %d\n", ioc4_revid);
-	if (ioc4_revid < ioc4_revid_min) {
-		printk(KERN_WARNING
-		    "IOC4 serial not supported on firmware rev %d, "
-				"please upgrade to rev %d or higher\n",
-				ioc4_revid, ioc4_revid_min);
-		return -EPERM;
-	}
-	BUG_ON(ioc4_misc == NULL);
-	BUG_ON(ioc4_serial == NULL);
-
-	/* Create port structures for each port */
-	for (port_number = 0; port_number < IOC4_NUM_SERIAL_PORTS;
-							port_number++) {
-		port = kzalloc(sizeof(struct ioc4_port), GFP_KERNEL);
-		if (!port) {
-			printk(KERN_WARNING
-				"IOC4 serial memory not available for port\n");
-			goto free;
-		}
-		spin_lock_init(&port->ip_lock);
-
-		/* we need to remember the previous ones, to point back to
-		 * them farther down - setting up the ring buffers.
-		 */
-		ports[port_number] = port;
-
-		/* Allocate buffers and jumpstart the hardware.  */
-		control->ic_port[port_number].icp_port = port;
-		port->ip_ioc4_soft = soft;
-		port->ip_pdev = pdev;
-		port->ip_ienb = 0;
-		/* Use baud rate calculations based on detected PCI
-		 * bus speed.  Simply test whether the PCI clock is
-		 * running closer to 66MHz or 33MHz.
-		 */
-		if (idd->count_period/IOC4_EXTINT_COUNT_DIVISOR < 20) {
-			port->ip_pci_bus_speed = IOC4_SER_XIN_CLK_66;
-		} else {
-			port->ip_pci_bus_speed = IOC4_SER_XIN_CLK_33;
-		}
-		port->ip_baud = 9600;
-		port->ip_control = control;
-		port->ip_mem = ioc4_misc;
-		port->ip_serial = ioc4_serial;
-
-		/* point to the right hook */
-		port->ip_hooks = &hooks_array[port_number];
-
-		/* Get direct hooks to the serial regs and uart regs
-		 * for this port
-		 */
-		switch (port_number) {
-		case 0:
-			port->ip_serial_regs = &(port->ip_serial->port_0);
-			port->ip_uart_regs = &(port->ip_serial->uart_0);
-			break;
-		case 1:
-			port->ip_serial_regs = &(port->ip_serial->port_1);
-			port->ip_uart_regs = &(port->ip_serial->uart_1);
-			break;
-		case 2:
-			port->ip_serial_regs = &(port->ip_serial->port_2);
-			port->ip_uart_regs = &(port->ip_serial->uart_2);
-			break;
-		default:
-		case 3:
-			port->ip_serial_regs = &(port->ip_serial->port_3);
-			port->ip_uart_regs = &(port->ip_serial->uart_3);
-			break;
-		}
-
-		/* ring buffers are 1 to a pair of ports */
-		if (port_number && (port_number & 1)) {
-			/* odd use the evens buffer */
-			port->ip_dma_ringbuf =
-					ports[port_number - 1]->ip_dma_ringbuf;
-			port->ip_cpu_ringbuf =
-					ports[port_number - 1]->ip_cpu_ringbuf;
-			port->ip_inring = RING(port, RX_1_OR_3);
-			port->ip_outring = RING(port, TX_1_OR_3);
-
-		} else {
-			if (port->ip_dma_ringbuf == 0) {
-				port->ip_cpu_ringbuf = pci_alloc_consistent
-					(pdev, TOTAL_RING_BUF_SIZE,
-					&port->ip_dma_ringbuf);
-
-			}
-			BUG_ON(!((((int64_t)port->ip_dma_ringbuf) &
-				(TOTAL_RING_BUF_SIZE - 1)) == 0));
-			DPRINT_CONFIG(("%s : ip_cpu_ringbuf 0x%p "
-						"ip_dma_ringbuf 0x%p\n",
-					__func__,
-					(void *)port->ip_cpu_ringbuf,
-					(void *)port->ip_dma_ringbuf));
-			port->ip_inring = RING(port, RX_0_OR_2);
-			port->ip_outring = RING(port, TX_0_OR_2);
-		}
-		DPRINT_CONFIG(("%s : port %d [addr 0x%p] control 0x%p",
-				__func__,
-				port_number, (void *)port, (void *)control));
-		DPRINT_CONFIG((" ip_serial_regs 0x%p ip_uart_regs 0x%p\n",
-				(void *)port->ip_serial_regs,
-				(void *)port->ip_uart_regs));
-
-		/* Initialize the hardware for IOC4 */
-		port_init(port);
-
-		DPRINT_CONFIG(("%s: port_number %d port 0x%p inring 0x%p "
-						"outring 0x%p\n",
-				__func__,
-				port_number, (void *)port,
-				(void *)port->ip_inring,
-				(void *)port->ip_outring));
-
-		/* Attach interrupt handlers */
-		intr_connect(soft, IOC4_SIO_INTR_TYPE,
-				GET_SIO_IR(port_number),
-				handle_intr, port);
-
-		intr_connect(soft, IOC4_OTHER_INTR_TYPE,
-				GET_OTHER_IR(port_number),
-				handle_dma_error_intr, port);
-	}
-	return 0;
-
-free:
-	while (port_number)
-		kfree(ports[--port_number]);
-	return -ENOMEM;
-}
-
-/**
- * enable_intrs - enable interrupts
- * @port: port to enable
- * @mask: mask to use
- */
-static void enable_intrs(struct ioc4_port *port, uint32_t mask)
-{
-	struct hooks *hooks = port->ip_hooks;
-
-	if ((port->ip_ienb & mask) != mask) {
-		write_ireg(port->ip_ioc4_soft, mask, IOC4_W_IES,
-						IOC4_SIO_INTR_TYPE);
-		port->ip_ienb |= mask;
-	}
-
-	if (port->ip_ienb)
-		write_ireg(port->ip_ioc4_soft, hooks->intr_dma_error,
-				IOC4_W_IES, IOC4_OTHER_INTR_TYPE);
-}
-
-/**
- * local_open - local open a port
- * @port: port to open
- */
-static inline int local_open(struct ioc4_port *port)
-{
-	int spiniter = 0;
-
-	port->ip_flags = PORT_ACTIVE;
-
-	/* Pause the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr | IOC4_SSCR_DMA_PAUSE,
-			&port->ip_serial_regs->sscr);
-		while((readl(&port->ip_serial_regs-> sscr)
-				& IOC4_SSCR_PAUSE_STATE) == 0) {
-			spiniter++;
-			if (spiniter > MAXITER) {
-				port->ip_flags = PORT_INACTIVE;
-				return -1;
-			}
-		}
-	}
-
-	/* Reset the input fifo.  If the uart received chars while the port
-	 * was closed and DMA is not enabled, the uart may have a bunch of
-	 * chars hanging around in its rx fifo which will not be discarded
-	 * by rclr in the upper layer. We must get rid of them here.
-	 */
-	writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR,
-				&port->ip_uart_regs->i4u_fcr);
-
-	writeb(UART_LCR_WLEN8, &port->ip_uart_regs->i4u_lcr);
-					/* UART_LCR_STOP == 1 stop */
-
-	/* Re-enable DMA, set default threshold to intr whenever there is
-	 * data available.
-	 */
-	port->ip_sscr &= ~IOC4_SSCR_RX_THRESHOLD;
-	port->ip_sscr |= 1;	/* default threshold */
-
-	/* Plug in the new sscr.  This implicitly clears the DMA_PAUSE
-	 * flag if it was set above
-	 */
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	port->ip_tx_lowat = 1;
-	return 0;
-}
-
-/**
- * set_rx_timeout - Set rx timeout and threshold values.
- * @port: port to use
- * @timeout: timeout value in ticks
- */
-static inline int set_rx_timeout(struct ioc4_port *port, int timeout)
-{
-	int threshold;
-
-	port->ip_rx_timeout = timeout;
-
-	/* Timeout is in ticks.  Let's figure out how many chars we
-	 * can receive at the current baud rate in that interval
-	 * and set the rx threshold to that amount.  There are 4 chars
-	 * per ring entry, so we'll divide the number of chars that will
-	 * arrive in timeout by 4.
-	 * So .... timeout * baud / 10 / HZ / 4, with HZ = 100.
-	 */
-	threshold = timeout * port->ip_baud / 4000;
-	if (threshold == 0)
-		threshold = 1;	/* otherwise we'll intr all the time! */
-
-	if ((unsigned)threshold > (unsigned)IOC4_SSCR_RX_THRESHOLD)
-		return 1;
-
-	port->ip_sscr &= ~IOC4_SSCR_RX_THRESHOLD;
-	port->ip_sscr |= threshold;
-
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-
-	/* Now set the rx timeout to the given value
-	 * again timeout * IOC4_SRTR_HZ / HZ
-	 */
-	timeout = timeout * IOC4_SRTR_HZ / 100;
-	if (timeout > IOC4_SRTR_CNT)
-		timeout = IOC4_SRTR_CNT;
-
-	writel(timeout, &port->ip_serial_regs->srtr);
-	return 0;
-}
-
-/**
- * config_port - config the hardware
- * @port: port to config
- * @baud: baud rate for the port
- * @byte_size: data size
- * @stop_bits: number of stop bits
- * @parenb: parity enable ?
- * @parodd: odd parity ?
- */
-static inline int
-config_port(struct ioc4_port *port,
-	    int baud, int byte_size, int stop_bits, int parenb, int parodd)
-{
-	char lcr, sizebits;
-	int spiniter = 0;
-
-	DPRINT_CONFIG(("%s: baud %d byte_size %d stop %d parenb %d parodd %d\n",
-		__func__, baud, byte_size, stop_bits, parenb, parodd));
-
-	if (set_baud(port, baud))
-		return 1;
-
-	switch (byte_size) {
-	case 5:
-		sizebits = UART_LCR_WLEN5;
-		break;
-	case 6:
-		sizebits = UART_LCR_WLEN6;
-		break;
-	case 7:
-		sizebits = UART_LCR_WLEN7;
-		break;
-	case 8:
-		sizebits = UART_LCR_WLEN8;
-		break;
-	default:
-		return 1;
-	}
-
-	/* Pause the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr | IOC4_SSCR_DMA_PAUSE,
-			&port->ip_serial_regs->sscr);
-		while((readl(&port->ip_serial_regs->sscr)
-						& IOC4_SSCR_PAUSE_STATE) == 0) {
-			spiniter++;
-			if (spiniter > MAXITER)
-				return -1;
-		}
-	}
-
-	/* Clear relevant fields in lcr */
-	lcr = readb(&port->ip_uart_regs->i4u_lcr);
-	lcr &= ~(LCR_MASK_BITS_CHAR | UART_LCR_EPAR |
-		 UART_LCR_PARITY | LCR_MASK_STOP_BITS);
-
-	/* Set byte size in lcr */
-	lcr |= sizebits;
-
-	/* Set parity */
-	if (parenb) {
-		lcr |= UART_LCR_PARITY;
-		if (!parodd)
-			lcr |= UART_LCR_EPAR;
-	}
-
-	/* Set stop bits */
-	if (stop_bits)
-		lcr |= UART_LCR_STOP /* 2 stop bits */ ;
-
-	writeb(lcr, &port->ip_uart_regs->i4u_lcr);
-
-	/* Re-enable the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	}
-	port->ip_baud = baud;
-
-	/* When we get within this number of ring entries of filling the
-	 * entire ring on tx, place an EXPLICIT intr to generate a lowat
-	 * notification when output has drained.
-	 */
-	port->ip_tx_lowat = (TX_LOWAT_CHARS(baud) + 3) / 4;
-	if (port->ip_tx_lowat == 0)
-		port->ip_tx_lowat = 1;
-
-	set_rx_timeout(port, 2);
-
-	return 0;
-}
-
-/**
- * do_write - Write bytes to the port.  Returns the number of bytes
- *			actually written. Called from transmit_chars
- * @port: port to use
- * @buf: the stuff to write
- * @len: how many bytes in 'buf'
- */
-static inline int do_write(struct ioc4_port *port, char *buf, int len)
-{
-	int prod_ptr, cons_ptr, total = 0;
-	struct ring *outring;
-	struct ring_entry *entry;
-	struct hooks *hooks = port->ip_hooks;
-
-	BUG_ON(!(len >= 0));
-
-	prod_ptr = port->ip_tx_prod;
-	cons_ptr = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK;
-	outring = port->ip_outring;
-
-	/* Maintain a 1-entry red-zone.  The ring buffer is full when
-	 * (cons - prod) % ring_size is 1.  Rather than do this subtraction
-	 * in the body of the loop, I'll do it now.
-	 */
-	cons_ptr = (cons_ptr - (int)sizeof(struct ring_entry)) & PROD_CONS_MASK;
-
-	/* Stuff the bytes into the output */
-	while ((prod_ptr != cons_ptr) && (len > 0)) {
-		int xx;
-
-		/* Get 4 bytes (one ring entry) at a time */
-		entry = (struct ring_entry *)((caddr_t) outring + prod_ptr);
-
-		/* Invalidate all entries */
-		entry->ring_allsc = 0;
-
-		/* Copy in some bytes */
-		for (xx = 0; (xx < 4) && (len > 0); xx++) {
-			entry->ring_data[xx] = *buf++;
-			entry->ring_sc[xx] = IOC4_TXCB_VALID;
-			len--;
-			total++;
-		}
-
-		/* If we are within some small threshold of filling up the
-		 * entire ring buffer, we must place an EXPLICIT intr here
-		 * to generate a lowat interrupt in case we subsequently
-		 * really do fill up the ring and the caller goes to sleep.
-		 * No need to place more than one though.
-		 */
-		if (!(port->ip_flags & LOWAT_WRITTEN) &&
-			((cons_ptr - prod_ptr) & PROD_CONS_MASK)
-				<= port->ip_tx_lowat
-					* (int)sizeof(struct ring_entry)) {
-			port->ip_flags |= LOWAT_WRITTEN;
-			entry->ring_sc[0] |= IOC4_TXCB_INT_WHEN_DONE;
-		}
-
-		/* Go on to next entry */
-		prod_ptr += sizeof(struct ring_entry);
-		prod_ptr &= PROD_CONS_MASK;
-	}
-
-	/* If we sent something, start DMA if necessary */
-	if (total > 0 && !(port->ip_sscr & IOC4_SSCR_DMA_EN)) {
-		port->ip_sscr |= IOC4_SSCR_DMA_EN;
-		writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	}
-
-	/* Store the new producer pointer.  If tx is disabled, we stuff the
-	 * data into the ring buffer, but we don't actually start tx.
-	 */
-	if (!uart_tx_stopped(port->ip_port)) {
-		writel(prod_ptr, &port->ip_serial_regs->stpir);
-
-		/* If we are now transmitting, enable tx_mt interrupt so we
-		 * can disable DMA if necessary when the tx finishes.
-		 */
-		if (total > 0)
-			enable_intrs(port, hooks->intr_tx_mt);
-	}
-	port->ip_tx_prod = prod_ptr;
-	return total;
-}
-
-/**
- * disable_intrs - disable interrupts
- * @port: port to enable
- * @mask: mask to use
- */
-static void disable_intrs(struct ioc4_port *port, uint32_t mask)
-{
-	struct hooks *hooks = port->ip_hooks;
-
-	if (port->ip_ienb & mask) {
-		write_ireg(port->ip_ioc4_soft, mask, IOC4_W_IEC,
-					IOC4_SIO_INTR_TYPE);
-		port->ip_ienb &= ~mask;
-	}
-
-	if (!port->ip_ienb)
-		write_ireg(port->ip_ioc4_soft, hooks->intr_dma_error,
-				IOC4_W_IEC, IOC4_OTHER_INTR_TYPE);
-}
-
-/**
- * set_notification - Modify event notification
- * @port: port to use
- * @mask: events mask
- * @set_on: set ?
- */
-static int set_notification(struct ioc4_port *port, int mask, int set_on)
-{
-	struct hooks *hooks = port->ip_hooks;
-	uint32_t intrbits, sscrbits;
-
-	BUG_ON(!mask);
-
-	intrbits = sscrbits = 0;
-
-	if (mask & N_DATA_READY)
-		intrbits |= (hooks->intr_rx_timer | hooks->intr_rx_high);
-	if (mask & N_OUTPUT_LOWAT)
-		intrbits |= hooks->intr_tx_explicit;
-	if (mask & N_DDCD) {
-		intrbits |= hooks->intr_delta_dcd;
-		sscrbits |= IOC4_SSCR_RX_RING_DCD;
-	}
-	if (mask & N_DCTS)
-		intrbits |= hooks->intr_delta_cts;
-
-	if (set_on) {
-		enable_intrs(port, intrbits);
-		port->ip_notify |= mask;
-		port->ip_sscr |= sscrbits;
-	} else {
-		disable_intrs(port, intrbits);
-		port->ip_notify &= ~mask;
-		port->ip_sscr &= ~sscrbits;
-	}
-
-	/* We require DMA if either DATA_READY or DDCD notification is
-	 * currently requested. If neither of these is requested and
-	 * there is currently no tx in progress, DMA may be disabled.
-	 */
-	if (port->ip_notify & (N_DATA_READY | N_DDCD))
-		port->ip_sscr |= IOC4_SSCR_DMA_EN;
-	else if (!(port->ip_ienb & hooks->intr_tx_mt))
-		port->ip_sscr &= ~IOC4_SSCR_DMA_EN;
-
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	return 0;
-}
-
-/**
- * set_mcr - set the master control reg
- * @the_port: port to use
- * @mask1: mcr mask
- * @mask2: shadow mask
- */
-static inline int set_mcr(struct uart_port *the_port,
-		int mask1, int mask2)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	uint32_t shadow;
-	int spiniter = 0;
-	char mcr;
-
-	if (!port)
-		return -1;
-
-	/* Pause the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr | IOC4_SSCR_DMA_PAUSE,
-			&port->ip_serial_regs->sscr);
-		while ((readl(&port->ip_serial_regs->sscr)
-					& IOC4_SSCR_PAUSE_STATE) == 0) {
-			spiniter++;
-			if (spiniter > MAXITER)
-				return -1;
-		}
-	}
-	shadow = readl(&port->ip_serial_regs->shadow);
-	mcr = (shadow & 0xff000000) >> 24;
-
-	/* Set new value */
-	mcr |= mask1;
-	shadow |= mask2;
-
-	writeb(mcr, &port->ip_uart_regs->i4u_mcr);
-	writel(shadow, &port->ip_serial_regs->shadow);
-
-	/* Re-enable the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	}
-	return 0;
-}
-
-/**
- * ioc4_set_proto - set the protocol for the port
- * @port: port to use
- * @proto: protocol to use
- */
-static int ioc4_set_proto(struct ioc4_port *port, int proto)
-{
-	struct hooks *hooks = port->ip_hooks;
-
-	switch (proto) {
-	case PROTO_RS232:
-		/* Clear the appropriate GIO pin */
-		writel(0, (&port->ip_mem->gppr[hooks->rs422_select_pin].raw));
-		break;
-
-	case PROTO_RS422:
-		/* Set the appropriate GIO pin */
-		writel(1, (&port->ip_mem->gppr[hooks->rs422_select_pin].raw));
-		break;
-
-	default:
-		return 1;
-	}
-	return 0;
-}
-
-/**
- * transmit_chars - upper level write, called with ip_lock
- * @the_port: port to write
- */
-static void transmit_chars(struct uart_port *the_port)
-{
-	int xmit_count, tail, head;
-	int result;
-	char *start;
-	struct tty_struct *tty;
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	struct uart_state *state;
-
-	if (!the_port)
-		return;
-	if (!port)
-		return;
-
-	state = the_port->state;
-	tty = state->port.tty;
-
-	if (uart_circ_empty(&state->xmit) || uart_tx_stopped(the_port)) {
-		/* Nothing to do or hw stopped */
-		set_notification(port, N_ALL_OUTPUT, 0);
-		return;
-	}
-
-	head = state->xmit.head;
-	tail = state->xmit.tail;
-	start = (char *)&state->xmit.buf[tail];
-
-	/* write out all the data or until the end of the buffer */
-	xmit_count = (head < tail) ? (UART_XMIT_SIZE - tail) : (head - tail);
-	if (xmit_count > 0) {
-		result = do_write(port, start, xmit_count);
-		if (result > 0) {
-			/* booking */
-			xmit_count -= result;
-			the_port->icount.tx += result;
-			/* advance the pointers */
-			tail += result;
-			tail &= UART_XMIT_SIZE - 1;
-			state->xmit.tail = tail;
-			start = (char *)&state->xmit.buf[tail];
-		}
-	}
-	if (uart_circ_chars_pending(&state->xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(the_port);
-
-	if (uart_circ_empty(&state->xmit)) {
-		set_notification(port, N_OUTPUT_LOWAT, 0);
-	} else {
-		set_notification(port, N_OUTPUT_LOWAT, 1);
-	}
-}
-
-/**
- * ioc4_change_speed - change the speed of the port
- * @the_port: port to change
- * @new_termios: new termios settings
- * @old_termios: old termios settings
- */
-static void
-ioc4_change_speed(struct uart_port *the_port,
-		  struct ktermios *new_termios, struct ktermios *old_termios)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	int baud, bits;
-	unsigned cflag, iflag;
-	int new_parity = 0, new_parity_enable = 0, new_stop = 0, new_data = 8;
-	struct uart_state *state = the_port->state;
-
-	cflag = new_termios->c_cflag;
-	iflag = new_termios->c_iflag;
-
-	switch (cflag & CSIZE) {
-	case CS5:
-		new_data = 5;
-		bits = 7;
-		break;
-	case CS6:
-		new_data = 6;
-		bits = 8;
-		break;
-	case CS7:
-		new_data = 7;
-		bits = 9;
-		break;
-	case CS8:
-		new_data = 8;
-		bits = 10;
-		break;
-	default:
-		/* cuz we always need a default ... */
-		new_data = 5;
-		bits = 7;
-		break;
-	}
-	if (cflag & CSTOPB) {
-		bits++;
-		new_stop = 1;
-	}
-	if (cflag & PARENB) {
-		bits++;
-		new_parity_enable = 1;
-		if (cflag & PARODD)
-			new_parity = 1;
-	}
-	baud = uart_get_baud_rate(the_port, new_termios, old_termios,
-				MIN_BAUD_SUPPORTED, MAX_BAUD_SUPPORTED);
-	DPRINT_CONFIG(("%s: returned baud %d\n", __func__, baud));
-
-	/* default is 9600 */
-	if (!baud)
-		baud = 9600;
-
-	if (!the_port->fifosize)
-		the_port->fifosize = IOC4_FIFO_CHARS;
-	the_port->timeout = ((the_port->fifosize * HZ * bits) / (baud / 10));
-	the_port->timeout += HZ / 50;	/* Add .02 seconds of slop */
-
-	the_port->ignore_status_mask = N_ALL_INPUT;
-
-	state->port.low_latency = 1;
-
-	if (iflag & IGNPAR)
-		the_port->ignore_status_mask &= ~(N_PARITY_ERROR
-						| N_FRAMING_ERROR);
-	if (iflag & IGNBRK) {
-		the_port->ignore_status_mask &= ~N_BREAK;
-		if (iflag & IGNPAR)
-			the_port->ignore_status_mask &= ~N_OVERRUN_ERROR;
-	}
-	if (!(cflag & CREAD)) {
-		/* ignore everything */
-		the_port->ignore_status_mask &= ~N_DATA_READY;
-	}
-
-	if (cflag & CRTSCTS) {
-		port->ip_sscr |= IOC4_SSCR_HFC_EN;
-	}
-	else {
-		port->ip_sscr &= ~IOC4_SSCR_HFC_EN;
-	}
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-
-	/* Set the configuration and proper notification call */
-	DPRINT_CONFIG(("%s : port 0x%p cflag 0%o "
-		"config_port(baud %d data %d stop %d p enable %d parity %d),"
-		" notification 0x%x\n",
-	     __func__, (void *)port, cflag, baud, new_data, new_stop,
-	     new_parity_enable, new_parity, the_port->ignore_status_mask));
-
-	if ((config_port(port, baud,		/* baud */
-			 new_data,		/* byte size */
-			 new_stop,		/* stop bits */
-			 new_parity_enable,	/* set parity */
-			 new_parity)) >= 0) {	/* parity 1==odd */
-		set_notification(port, the_port->ignore_status_mask, 1);
-	}
-}
-
-/**
- * ic4_startup_local - Start up the serial port - returns >= 0 if no errors
- * @the_port: Port to operate on
- */
-static inline int ic4_startup_local(struct uart_port *the_port)
-{
-	struct ioc4_port *port;
-	struct uart_state *state;
-
-	if (!the_port)
-		return -1;
-
-	port = get_ioc4_port(the_port, 0);
-	if (!port)
-		return -1;
-
-	state = the_port->state;
-
-	local_open(port);
-
-	/* set the protocol - mapbase has the port type */
-	ioc4_set_proto(port, the_port->mapbase);
-
-	/* set the speed of the serial port */
-	ioc4_change_speed(the_port, &state->port.tty->termios,
-			  (struct ktermios *)0);
-
-	return 0;
-}
-
-/*
- * ioc4_cb_output_lowat - called when the output low water mark is hit
- * @the_port: port to output
- */
-static void ioc4_cb_output_lowat(struct uart_port *the_port)
-{
-	unsigned long pflags;
-
-	/* ip_lock is set on the call here */
-	if (the_port) {
-		spin_lock_irqsave(&the_port->lock, pflags);
-		transmit_chars(the_port);
-		spin_unlock_irqrestore(&the_port->lock, pflags);
-	}
-}
-
-/**
- * handle_intr - service any interrupts for the given port - 2nd level
- *			called via sd_intr
- * @arg: handler arg
- * @sio_ir: ioc4regs
- */
-static void handle_intr(void *arg, uint32_t sio_ir)
-{
-	struct ioc4_port *port = (struct ioc4_port *)arg;
-	struct hooks *hooks = port->ip_hooks;
-	unsigned int rx_high_rd_aborted = 0;
-	unsigned long flags;
-	struct uart_port *the_port;
-	int loop_counter;
-
-	/* Possible race condition here: The tx_mt interrupt bit may be
-	 * cleared without the intervention of the interrupt handler,
-	 * e.g. by a write.  If the top level interrupt handler reads a
-	 * tx_mt, then some other processor does a write, starting up
-	 * output, then we come in here, see the tx_mt and stop DMA, the
-	 * output started by the other processor will hang.  Thus we can
-	 * only rely on tx_mt being legitimate if it is read while the
-	 * port lock is held.  Therefore this bit must be ignored in the
-	 * passed in interrupt mask which was read by the top level
-	 * interrupt handler since the port lock was not held at the time
-	 * it was read.  We can only rely on this bit being accurate if it
-	 * is read while the port lock is held.  So we'll clear it for now,
-	 * and reload it later once we have the port lock.
-	 */
-	sio_ir &= ~(hooks->intr_tx_mt);
-
-	spin_lock_irqsave(&port->ip_lock, flags);
-
-	loop_counter = MAXITER;	/* to avoid hangs */
-
-	do {
-		uint32_t shadow;
-
-		if ( loop_counter-- <= 0 ) {
-			printk(KERN_WARNING "IOC4 serial: "
-					"possible hang condition/"
-					"port stuck on interrupt.\n");
-			break;
-		}
-
-		/* Handle a DCD change */
-		if (sio_ir & hooks->intr_delta_dcd) {
-			/* ACK the interrupt */
-			writel(hooks->intr_delta_dcd,
-				&port->ip_mem->sio_ir.raw);
-
-			shadow = readl(&port->ip_serial_regs->shadow);
-
-			if ((port->ip_notify & N_DDCD)
-					&& (shadow & IOC4_SHADOW_DCD)
-					&& (port->ip_port)) {
-				the_port = port->ip_port;
-				the_port->icount.dcd = 1;
-				wake_up_interruptible
-					    (&the_port->state->port.delta_msr_wait);
-			} else if ((port->ip_notify & N_DDCD)
-					&& !(shadow & IOC4_SHADOW_DCD)) {
-				/* Flag delta DCD/no DCD */
-				port->ip_flags |= DCD_ON;
-			}
-		}
-
-		/* Handle a CTS change */
-		if (sio_ir & hooks->intr_delta_cts) {
-			/* ACK the interrupt */
-			writel(hooks->intr_delta_cts,
-					&port->ip_mem->sio_ir.raw);
-
-			shadow = readl(&port->ip_serial_regs->shadow);
-
-			if ((port->ip_notify & N_DCTS)
-					&& (port->ip_port)) {
-				the_port = port->ip_port;
-				the_port->icount.cts =
-					(shadow & IOC4_SHADOW_CTS) ? 1 : 0;
-				wake_up_interruptible
-					(&the_port->state->port.delta_msr_wait);
-			}
-		}
-
-		/* rx timeout interrupt.  Must be some data available.  Put this
-		 * before the check for rx_high since servicing this condition
-		 * may cause that condition to clear.
-		 */
-		if (sio_ir & hooks->intr_rx_timer) {
-			/* ACK the interrupt */
-			writel(hooks->intr_rx_timer,
-				&port->ip_mem->sio_ir.raw);
-
-			if ((port->ip_notify & N_DATA_READY)
-					&& (port->ip_port)) {
-				/* ip_lock is set on call here */
-				receive_chars(port->ip_port);
-			}
-		}
-
-		/* rx high interrupt. Must be after rx_timer.  */
-		else if (sio_ir & hooks->intr_rx_high) {
-			/* Data available, notify upper layer */
-			if ((port->ip_notify & N_DATA_READY)
-						&& port->ip_port) {
-				/* ip_lock is set on call here */
-				receive_chars(port->ip_port);
-			}
-
-			/* We can't ACK this interrupt.  If receive_chars didn't
-			 * cause the condition to clear, we'll have to disable
-			 * the interrupt until the data is drained.
-			 * If the read was aborted, don't disable the interrupt
-			 * as this may cause us to hang indefinitely.  An
-			 * aborted read generally means that this interrupt
-			 * hasn't been delivered to the cpu yet anyway, even
-			 * though we see it as asserted when we read the sio_ir.
-			 */
-			if ((sio_ir = PENDING(port)) & hooks->intr_rx_high) {
-				if ((port->ip_flags & READ_ABORTED) == 0) {
-					port->ip_ienb &= ~hooks->intr_rx_high;
-					port->ip_flags |= INPUT_HIGH;
-				} else {
-					rx_high_rd_aborted++;
-				}
-			}
-		}
-
-		/* We got a low water interrupt: notify upper layer to
-		 * send more data.  Must come before tx_mt since servicing
-		 * this condition may cause that condition to clear.
-		 */
-		if (sio_ir & hooks->intr_tx_explicit) {
-			port->ip_flags &= ~LOWAT_WRITTEN;
-
-			/* ACK the interrupt */
-			writel(hooks->intr_tx_explicit,
-					&port->ip_mem->sio_ir.raw);
-
-			if (port->ip_notify & N_OUTPUT_LOWAT)
-				ioc4_cb_output_lowat(port->ip_port);
-		}
-
-		/* Handle tx_mt.  Must come after tx_explicit.  */
-		else if (sio_ir & hooks->intr_tx_mt) {
-			/* If we are expecting a lowat notification
-			 * and we get to this point it probably means that for
-			 * some reason the tx_explicit didn't work as expected
-			 * (that can legitimately happen if the output buffer is
-			 * filled up in just the right way).
-			 * So send the notification now.
-			 */
-			if (port->ip_notify & N_OUTPUT_LOWAT) {
-				ioc4_cb_output_lowat(port->ip_port);
-
-				/* We need to reload the sio_ir since the lowat
-				 * call may have caused another write to occur,
-				 * clearing the tx_mt condition.
-				 */
-				sio_ir = PENDING(port);
-			}
-
-			/* If the tx_mt condition still persists even after the
-			 * lowat call, we've got some work to do.
-			 */
-			if (sio_ir & hooks->intr_tx_mt) {
-
-				/* If we are not currently expecting DMA input,
-				 * and the transmitter has just gone idle,
-				 * there is no longer any reason for DMA, so
-				 * disable it.
-				 */
-				if (!(port->ip_notify
-						& (N_DATA_READY | N_DDCD))) {
-					BUG_ON(!(port->ip_sscr
-							& IOC4_SSCR_DMA_EN));
-					port->ip_sscr &= ~IOC4_SSCR_DMA_EN;
-					writel(port->ip_sscr,
-					   &port->ip_serial_regs->sscr);
-				}
-
-				/* Prevent infinite tx_mt interrupt */
-				port->ip_ienb &= ~hooks->intr_tx_mt;
-			}
-		}
-		sio_ir = PENDING(port);
-
-		/* if the read was aborted and only hooks->intr_rx_high,
-		 * clear hooks->intr_rx_high, so we do not loop forever.
-		 */
-
-		if (rx_high_rd_aborted && (sio_ir == hooks->intr_rx_high)) {
-			sio_ir &= ~hooks->intr_rx_high;
-		}
-	} while (sio_ir & hooks->intr_all);
-
-	spin_unlock_irqrestore(&port->ip_lock, flags);
-
-	/* Re-enable interrupts before returning from interrupt handler.
-	 * Getting interrupted here is okay.  It'll just v() our semaphore, and
-	 * we'll come through the loop again.
-	 */
-
-	write_ireg(port->ip_ioc4_soft, port->ip_ienb, IOC4_W_IES,
-							IOC4_SIO_INTR_TYPE);
-}
-
-/*
- * ioc4_cb_post_ncs - called for some basic errors
- * @port: port to use
- * @ncs: event
- */
-static void ioc4_cb_post_ncs(struct uart_port *the_port, int ncs)
-{
-	struct uart_icount *icount;
-
-	icount = &the_port->icount;
-
-	if (ncs & NCS_BREAK)
-		icount->brk++;
-	if (ncs & NCS_FRAMING)
-		icount->frame++;
-	if (ncs & NCS_OVERRUN)
-		icount->overrun++;
-	if (ncs & NCS_PARITY)
-		icount->parity++;
-}
-
-/**
- * do_read - Read in bytes from the port.  Return the number of bytes
- *			actually read.
- * @the_port: port to use
- * @buf: place to put the stuff we read
- * @len: how big 'buf' is
- */
-
-static inline int do_read(struct uart_port *the_port, unsigned char *buf,
-				int len)
-{
-	int prod_ptr, cons_ptr, total;
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	struct ring *inring;
-	struct ring_entry *entry;
-	struct hooks *hooks;
-	int byte_num;
-	char *sc;
-	int loop_counter;
-
-	BUG_ON(!(len >= 0));
-	BUG_ON(!port);
-	hooks = port->ip_hooks;
-
-	/* There is a nasty timing issue in the IOC4. When the rx_timer
-	 * expires or the rx_high condition arises, we take an interrupt.
-	 * At some point while servicing the interrupt, we read bytes from
-	 * the ring buffer and re-arm the rx_timer.  However the rx_timer is
-	 * not started until the first byte is received *after* it is armed,
-	 * and any bytes pending in the rx construction buffers are not drained
-	 * to memory until either there are 4 bytes available or the rx_timer
-	 * expires.  This leads to a potential situation where data is left
-	 * in the construction buffers forever - 1 to 3 bytes were received
-	 * after the interrupt was generated but before the rx_timer was
-	 * re-armed. At that point as long as no subsequent bytes are received
-	 * the timer will never be started and the bytes will remain in the
-	 * construction buffer forever.  The solution is to execute a DRAIN
-	 * command after rearming the timer.  This way any bytes received before
-	 * the DRAIN will be drained to memory, and any bytes received after
-	 * the DRAIN will start the TIMER and be drained when it expires.
-	 * Luckily, this only needs to be done when the DMA buffer is empty
-	 * since there is no requirement that this function return all
-	 * available data as long as it returns some.
-	 */
-	/* Re-arm the timer */
-	writel(port->ip_rx_cons | IOC4_SRCIR_ARM, &port->ip_serial_regs->srcir);
-
-	prod_ptr = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK;
-	cons_ptr = port->ip_rx_cons;
-
-	if (prod_ptr == cons_ptr) {
-		int reset_dma = 0;
-
-		/* Input buffer appears empty, do a flush. */
-
-		/* DMA must be enabled for this to work. */
-		if (!(port->ip_sscr & IOC4_SSCR_DMA_EN)) {
-			port->ip_sscr |= IOC4_SSCR_DMA_EN;
-			reset_dma = 1;
-		}
-
-		/* Potential race condition: we must reload the srpir after
-		 * issuing the drain command, otherwise we could think the rx
-		 * buffer is empty, then take a very long interrupt, and when
-		 * we come back it's full and we wait forever for the drain to
-		 * complete.
-		 */
-		writel(port->ip_sscr | IOC4_SSCR_RX_DRAIN,
-				&port->ip_serial_regs->sscr);
-		prod_ptr = readl(&port->ip_serial_regs->srpir)
-				& PROD_CONS_MASK;
-
-		/* We must not wait for the DRAIN to complete unless there are
-		 * at least 8 bytes (2 ring entries) available to receive the
-		 * data otherwise the DRAIN will never complete and we'll
-		 * deadlock here.
-		 * In fact, to make things easier, I'll just ignore the flush if
-		 * there is any data at all now available.
-		 */
-		if (prod_ptr == cons_ptr) {
-			loop_counter = 0;
-			while (readl(&port->ip_serial_regs->sscr) &
-						IOC4_SSCR_RX_DRAIN) {
-				loop_counter++;
-				if (loop_counter > MAXITER)
-					return -1;
-			}
-
-			/* SIGH. We have to reload the prod_ptr *again* since
-			 * the drain may have caused it to change
-			 */
-			prod_ptr = readl(&port->ip_serial_regs->srpir)
-							& PROD_CONS_MASK;
-		}
-		if (reset_dma) {
-			port->ip_sscr &= ~IOC4_SSCR_DMA_EN;
-			writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-		}
-	}
-	inring = port->ip_inring;
-	port->ip_flags &= ~READ_ABORTED;
-
-	total = 0;
-	loop_counter = 0xfffff;	/* to avoid hangs */
-
-	/* Grab bytes from the hardware */
-	while ((prod_ptr != cons_ptr) && (len > 0)) {
-		entry = (struct ring_entry *)((caddr_t)inring + cons_ptr);
-
-		if ( loop_counter-- <= 0 ) {
-			printk(KERN_WARNING "IOC4 serial: "
-					"possible hang condition/"
-					"port stuck on read.\n");
-			break;
-		}
-
-		/* According to the producer pointer, this ring entry
-		 * must contain some data.  But if the PIO happened faster
-		 * than the DMA, the data may not be available yet, so let's
-		 * wait until it arrives.
-		 */
-		if ((entry->ring_allsc & RING_ANY_VALID) == 0) {
-			/* Indicate the read is aborted so we don't disable
-			 * the interrupt thinking that the consumer is
-			 * congested.
-			 */
-			port->ip_flags |= READ_ABORTED;
-			len = 0;
-			break;
-		}
-
-		/* Load the bytes/status out of the ring entry */
-		for (byte_num = 0; byte_num < 4 && len > 0; byte_num++) {
-			sc = &(entry->ring_sc[byte_num]);
-
-			/* Check for change in modem state or overrun */
-			if ((*sc & IOC4_RXSB_MODEM_VALID)
-						&& (port->ip_notify & N_DDCD)) {
-				/* Notify upper layer if DCD dropped */
-
-				if ((port->ip_flags & DCD_ON)
-						&& !(*sc & IOC4_RXSB_DCD)) {
-
-					/* If we have already copied some data,
-					 * return it.  We'll pick up the carrier
-					 * drop on the next pass.  That way we
-					 * don't throw away the data that has
-					 * already been copied back to
-					 * the caller's buffer.
-					 */
-					if (total > 0) {
-						len = 0;
-						break;
-					}
-					port->ip_flags &= ~DCD_ON;
-
-					/* Turn off this notification so the
-					 * carrier drop protocol won't see it
-					 * again when it does a read.
-					 */
-					*sc &= ~IOC4_RXSB_MODEM_VALID;
-
-					/* To keep things consistent, we need
-					 * to update the consumer pointer so
-					 * the next reader won't come in and
-					 * try to read the same ring entries
-					 * again. This must be done here before
-					 * the dcd change.
-					 */
-
-					if ((entry->ring_allsc & RING_ANY_VALID)
-									== 0) {
-						cons_ptr += (int)sizeof
-							(struct ring_entry);
-						cons_ptr &= PROD_CONS_MASK;
-					}
-					writel(cons_ptr,
-						&port->ip_serial_regs->srcir);
-					port->ip_rx_cons = cons_ptr;
-
-					/* Notify upper layer of carrier drop */
-					if ((port->ip_notify & N_DDCD)
-						   && port->ip_port) {
-						the_port->icount.dcd = 0;
-						wake_up_interruptible
-						    (&the_port->state->
-							port.delta_msr_wait);
-					}
-
-					/* If we had any data to return, we
-					 * would have returned it above.
-					 */
-					return 0;
-				}
-			}
-			if (*sc & IOC4_RXSB_MODEM_VALID) {
-				/* Notify that an input overrun occurred */
-				if ((*sc & IOC4_RXSB_OVERRUN)
-				    && (port->ip_notify & N_OVERRUN_ERROR)) {
-					ioc4_cb_post_ncs(the_port, NCS_OVERRUN);
-				}
-				/* Don't look at this byte again */
-				*sc &= ~IOC4_RXSB_MODEM_VALID;
-			}
-
-			/* Check for valid data or RX errors */
-			if ((*sc & IOC4_RXSB_DATA_VALID) &&
-					((*sc & (IOC4_RXSB_PAR_ERR
-							| IOC4_RXSB_FRAME_ERR
-							| IOC4_RXSB_BREAK))
-					&& (port->ip_notify & (N_PARITY_ERROR
-							| N_FRAMING_ERROR
-							| N_BREAK)))) {
-				/* There is an error condition on the next byte.
-				 * If we have already transferred some bytes,
-				 * we'll stop here. Otherwise if this is the
-				 * first byte to be read, we'll just transfer
-				 * it alone after notifying the
-				 * upper layer of its status.
-				 */
-				if (total > 0) {
-					len = 0;
-					break;
-				} else {
-					if ((*sc & IOC4_RXSB_PAR_ERR) &&
-					   (port->ip_notify & N_PARITY_ERROR)) {
-						ioc4_cb_post_ncs(the_port,
-								NCS_PARITY);
-					}
-					if ((*sc & IOC4_RXSB_FRAME_ERR) &&
-					   (port->ip_notify & N_FRAMING_ERROR)){
-						ioc4_cb_post_ncs(the_port,
-								NCS_FRAMING);
-					}
-					if ((*sc & IOC4_RXSB_BREAK)
-					    && (port->ip_notify & N_BREAK)) {
-							ioc4_cb_post_ncs
-								    (the_port,
-								     NCS_BREAK);
-					}
-					len = 1;
-				}
-			}
-			if (*sc & IOC4_RXSB_DATA_VALID) {
-				*sc &= ~IOC4_RXSB_DATA_VALID;
-				*buf = entry->ring_data[byte_num];
-				buf++;
-				len--;
-				total++;
-			}
-		}
-
-		/* If we used up this entry entirely, go on to the next one,
-		 * otherwise we must have run out of buffer space, so
-		 * leave the consumer pointer here for the next read in case
-		 * there are still unread bytes in this entry.
-		 */
-		if ((entry->ring_allsc & RING_ANY_VALID) == 0) {
-			cons_ptr += (int)sizeof(struct ring_entry);
-			cons_ptr &= PROD_CONS_MASK;
-		}
-	}
-
-	/* Update consumer pointer and re-arm rx timer interrupt */
-	writel(cons_ptr, &port->ip_serial_regs->srcir);
-	port->ip_rx_cons = cons_ptr;
-
-	/* If we have now dipped below the rx high water mark and we have
-	 * rx_high interrupt turned off, we can now turn it back on again.
-	 */
-	if ((port->ip_flags & INPUT_HIGH) && (((prod_ptr - cons_ptr)
-			& PROD_CONS_MASK) < ((port->ip_sscr &
-				IOC4_SSCR_RX_THRESHOLD)
-					<< IOC4_PROD_CONS_PTR_OFF))) {
-		port->ip_flags &= ~INPUT_HIGH;
-		enable_intrs(port, hooks->intr_rx_high);
-	}
-	return total;
-}
-
-/**
- * receive_chars - upper level read. Called with ip_lock.
- * @the_port: port to read from
- */
-static void receive_chars(struct uart_port *the_port)
-{
-	unsigned char ch[IOC4_MAX_CHARS];
-	int read_count, request_count = IOC4_MAX_CHARS;
-	struct uart_icount *icount;
-	struct uart_state *state = the_port->state;
-	unsigned long pflags;
-
-	/* Make sure all the pointers are "good" ones */
-	if (!state)
-		return;
-
-	spin_lock_irqsave(&the_port->lock, pflags);
-
-	request_count = tty_buffer_request_room(&state->port, IOC4_MAX_CHARS);
-
-	if (request_count > 0) {
-		icount = &the_port->icount;
-		read_count = do_read(the_port, ch, request_count);
-		if (read_count > 0) {
-			tty_insert_flip_string(&state->port, ch, read_count);
-			icount->rx += read_count;
-		}
-	}
-
-	spin_unlock_irqrestore(&the_port->lock, pflags);
-
-	tty_flip_buffer_push(&state->port);
-}
-
-/**
- * ic4_type - What type of console are we?
- * @port: Port to operate with (we ignore since we only have one port)
- *
- */
-static const char *ic4_type(struct uart_port *the_port)
-{
-	if (the_port->mapbase == PROTO_RS232)
-		return "SGI IOC4 Serial [rs232]";
-	else
-		return "SGI IOC4 Serial [rs422]";
-}
-
-/**
- * ic4_tx_empty - Is the transmitter empty?
- * @port: Port to operate on
- *
- */
-static unsigned int ic4_tx_empty(struct uart_port *the_port)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	unsigned int ret = 0;
-
-	if (port_is_active(port, the_port)) {
-		if (readl(&port->ip_serial_regs->shadow) & IOC4_SHADOW_TEMT)
-			ret = TIOCSER_TEMT;
-	}
-	return ret;
-}
-
-/**
- * ic4_stop_tx - stop the transmitter
- * @port: Port to operate on
- *
- */
-static void ic4_stop_tx(struct uart_port *the_port)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-
-	if (port_is_active(port, the_port))
-		set_notification(port, N_OUTPUT_LOWAT, 0);
-}
-
-/**
- * null_void_function -
- * @port: Port to operate on
- *
- */
-static void null_void_function(struct uart_port *the_port)
-{
-}
-
-/**
- * ic4_shutdown - shut down the port - free irq and disable
- * @port: Port to shut down
- *
- */
-static void ic4_shutdown(struct uart_port *the_port)
-{
-	unsigned long port_flags;
-	struct ioc4_port *port;
-	struct uart_state *state;
-
-	port = get_ioc4_port(the_port, 0);
-	if (!port)
-		return;
-
-	state = the_port->state;
-	port->ip_port = NULL;
-
-	wake_up_interruptible(&state->port.delta_msr_wait);
-
-	if (state->port.tty)
-		set_bit(TTY_IO_ERROR, &state->port.tty->flags);
-
-	spin_lock_irqsave(&the_port->lock, port_flags);
-	set_notification(port, N_ALL, 0);
-	port->ip_flags = PORT_INACTIVE;
-	spin_unlock_irqrestore(&the_port->lock, port_flags);
-}
-
-/**
- * ic4_set_mctrl - set control lines (dtr, rts, etc)
- * @port: Port to operate on
- * @mctrl: Lines to set/unset
- *
- */
-static void ic4_set_mctrl(struct uart_port *the_port, unsigned int mctrl)
-{
-	unsigned char mcr = 0;
-	struct ioc4_port *port;
-
-	port = get_ioc4_port(the_port, 0);
-	if (!port_is_active(port, the_port))
-		return;
-
-	if (mctrl & TIOCM_RTS)
-		mcr |= UART_MCR_RTS;
-	if (mctrl & TIOCM_DTR)
-		mcr |= UART_MCR_DTR;
-	if (mctrl & TIOCM_OUT1)
-		mcr |= UART_MCR_OUT1;
-	if (mctrl & TIOCM_OUT2)
-		mcr |= UART_MCR_OUT2;
-	if (mctrl & TIOCM_LOOP)
-		mcr |= UART_MCR_LOOP;
-
-	set_mcr(the_port, mcr, IOC4_SHADOW_DTR);
-}
-
-/**
- * ic4_get_mctrl - get control line info
- * @port: port to operate on
- *
- */
-static unsigned int ic4_get_mctrl(struct uart_port *the_port)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	uint32_t shadow;
-	unsigned int ret = 0;
-
-	if (!port_is_active(port, the_port))
-		return 0;
-
-	shadow = readl(&port->ip_serial_regs->shadow);
-	if (shadow & IOC4_SHADOW_DCD)
-		ret |= TIOCM_CAR;
-	if (shadow & IOC4_SHADOW_DR)
-		ret |= TIOCM_DSR;
-	if (shadow & IOC4_SHADOW_CTS)
-		ret |= TIOCM_CTS;
-	return ret;
-}
-
-/**
- * ic4_start_tx - Start transmitter, flush any output
- * @port: Port to operate on
- *
- */
-static void ic4_start_tx(struct uart_port *the_port)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-
-	if (port_is_active(port, the_port)) {
-		set_notification(port, N_OUTPUT_LOWAT, 1);
-		enable_intrs(port, port->ip_hooks->intr_tx_mt);
-	}
-}
-
-/**
- * ic4_break_ctl - handle breaks
- * @port: Port to operate on
- * @break_state: Break state
- *
- */
-static void ic4_break_ctl(struct uart_port *the_port, int break_state)
-{
-}
-
-/**
- * ic4_startup - Start up the serial port
- * @port: Port to operate on
- *
- */
-static int ic4_startup(struct uart_port *the_port)
-{
-	int retval;
-	struct ioc4_port *port;
-	struct ioc4_control *control;
-	struct uart_state *state;
-	unsigned long port_flags;
-
-	if (!the_port)
-		return -ENODEV;
-	port = get_ioc4_port(the_port, 1);
-	if (!port)
-		return -ENODEV;
-	state = the_port->state;
-
-	control = port->ip_control;
-	if (!control) {
-		port->ip_port = NULL;
-		return -ENODEV;
-	}
-
-	/* Start up the serial port */
-	spin_lock_irqsave(&the_port->lock, port_flags);
-	retval = ic4_startup_local(the_port);
-	spin_unlock_irqrestore(&the_port->lock, port_flags);
-	return retval;
-}
-
-/**
- * ic4_set_termios - set termios stuff
- * @port: port to operate on
- * @termios: New settings
- * @termios: Old
- *
- */
-static void
-ic4_set_termios(struct uart_port *the_port,
-		struct ktermios *termios, struct ktermios *old_termios)
-{
-	unsigned long port_flags;
-
-	spin_lock_irqsave(&the_port->lock, port_flags);
-	ioc4_change_speed(the_port, termios, old_termios);
-	spin_unlock_irqrestore(&the_port->lock, port_flags);
-}
-
-/**
- * ic4_request_port - allocate resources for port - no op....
- * @port: port to operate on
- *
- */
-static int ic4_request_port(struct uart_port *port)
-{
-	return 0;
-}
-
-/* Associate the uart functions above - given to serial core */
-
-static const struct uart_ops ioc4_ops = {
-	.tx_empty	= ic4_tx_empty,
-	.set_mctrl	= ic4_set_mctrl,
-	.get_mctrl	= ic4_get_mctrl,
-	.stop_tx	= ic4_stop_tx,
-	.start_tx	= ic4_start_tx,
-	.stop_rx	= null_void_function,
-	.break_ctl	= ic4_break_ctl,
-	.startup	= ic4_startup,
-	.shutdown	= ic4_shutdown,
-	.set_termios	= ic4_set_termios,
-	.type		= ic4_type,
-	.release_port	= null_void_function,
-	.request_port	= ic4_request_port,
-};
-
-/*
- * Boot-time initialization code
- */
-
-static struct uart_driver ioc4_uart_rs232 = {
-	.owner		= THIS_MODULE,
-	.driver_name	= "ioc4_serial_rs232",
-	.dev_name	= DEVICE_NAME_RS232,
-	.major		= DEVICE_MAJOR,
-	.minor		= DEVICE_MINOR_RS232,
-	.nr		= IOC4_NUM_CARDS * IOC4_NUM_SERIAL_PORTS,
-};
-
-static struct uart_driver ioc4_uart_rs422 = {
-	.owner		= THIS_MODULE,
-	.driver_name	= "ioc4_serial_rs422",
-	.dev_name	= DEVICE_NAME_RS422,
-	.major		= DEVICE_MAJOR,
-	.minor		= DEVICE_MINOR_RS422,
-	.nr		= IOC4_NUM_CARDS * IOC4_NUM_SERIAL_PORTS,
-};
-
-
-/**
- * ioc4_serial_remove_one - detach function
- *
- * @idd: IOC4 master module data for this IOC4
- */
-
-static int ioc4_serial_remove_one(struct ioc4_driver_data *idd)
-{
-	int port_num, port_type;
-	struct ioc4_control *control;
-	struct uart_port *the_port;
-	struct ioc4_port *port;
-	struct ioc4_soft *soft;
-
-	/* If serial driver did not attach, don't try to detach */
-	control = idd->idd_serial_data;
-	if (!control)
-		return 0;
-
-	for (port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS; port_num++) {
-		for (port_type = UART_PORT_MIN;
-					port_type < UART_PORT_COUNT;
-					port_type++) {
-			the_port = &control->ic_port[port_num].icp_uart_port
-							[port_type];
-			if (the_port) {
-				switch (port_type) {
-				case UART_PORT_RS422:
-					uart_remove_one_port(&ioc4_uart_rs422,
-							the_port);
-					break;
-				default:
-				case UART_PORT_RS232:
-					uart_remove_one_port(&ioc4_uart_rs232,
-							the_port);
-					break;
-				}
-			}
-		}
-		port = control->ic_port[port_num].icp_port;
-		/* we allocate in pairs */
-		if (!(port_num & 1) && port) {
-			pci_free_consistent(port->ip_pdev,
-					TOTAL_RING_BUF_SIZE,
-					port->ip_cpu_ringbuf,
-					port->ip_dma_ringbuf);
-			kfree(port);
-		}
-	}
-	soft = control->ic_soft;
-	if (soft) {
-		free_irq(control->ic_irq, soft);
-		if (soft->is_ioc4_serial_addr) {
-			iounmap(soft->is_ioc4_serial_addr);
-			release_mem_region((unsigned long)
-			     soft->is_ioc4_serial_addr,
-				sizeof(struct ioc4_serial));
-		}
-		kfree(soft);
-	}
-	kfree(control);
-	idd->idd_serial_data = NULL;
-
-	return 0;
-}
-
-
-/**
- * ioc4_serial_core_attach_rs232 - register with serial core
- *		This is done during pci probing
- * @pdev: handle for this card
- */
-static inline int
-ioc4_serial_core_attach(struct pci_dev *pdev, int port_type)
-{
-	struct ioc4_port *port;
-	struct uart_port *the_port;
-	struct ioc4_driver_data *idd = pci_get_drvdata(pdev);
-	struct ioc4_control *control = idd->idd_serial_data;
-	int port_num;
-	int port_type_idx;
-	struct uart_driver *u_driver;
-
-
-	DPRINT_CONFIG(("%s: attach pdev 0x%p - control 0x%p\n",
-			__func__, pdev, (void *)control));
-
-	if (!control)
-		return -ENODEV;
-
-	port_type_idx = (port_type == PROTO_RS232) ? UART_PORT_RS232
-						: UART_PORT_RS422;
-
-	u_driver = (port_type == PROTO_RS232)	? &ioc4_uart_rs232
-						: &ioc4_uart_rs422;
-
-	/* once around for each port on this card */
-	for (port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS; port_num++) {
-		the_port = &control->ic_port[port_num].icp_uart_port
-							[port_type_idx];
-		port = control->ic_port[port_num].icp_port;
-		port->ip_all_ports[port_type_idx] = the_port;
-
-		DPRINT_CONFIG(("%s: attach the_port 0x%p / port 0x%p : type %s\n",
-				__func__, (void *)the_port,
-				(void *)port,
-				port_type == PROTO_RS232 ? "rs232" : "rs422"));
-
-		/* membase, iobase and mapbase just need to be non-0 */
-		the_port->membase = (unsigned char __iomem *)1;
-		the_port->iobase = (pdev->bus->number << 16) |  port_num;
-		the_port->line = (Num_of_ioc4_cards << 2) | port_num;
-		the_port->mapbase = port_type;
-		the_port->type = PORT_16550A;
-		the_port->fifosize = IOC4_FIFO_CHARS;
-		the_port->ops = &ioc4_ops;
-		the_port->irq = control->ic_irq;
-		the_port->dev = &pdev->dev;
-		spin_lock_init(&the_port->lock);
-		if (uart_add_one_port(u_driver, the_port) < 0) {
-			printk(KERN_WARNING
-		           "%s: unable to add port %d bus %d\n",
-			       __func__, the_port->line, pdev->bus->number);
-		} else {
-			DPRINT_CONFIG(
-			    ("IOC4 serial port %d irq = %d, bus %d\n",
-			       the_port->line, the_port->irq, pdev->bus->number));
-		}
-	}
-	return 0;
-}
-
-/**
- * ioc4_serial_attach_one - register attach function
- *		called per card found from IOC4 master module.
- * @idd: Master module data for this IOC4
- */
-static int
-ioc4_serial_attach_one(struct ioc4_driver_data *idd)
-{
-	unsigned long tmp_addr1;
-	struct ioc4_serial __iomem *serial;
-	struct ioc4_soft *soft;
-	struct ioc4_control *control;
-	int ret = 0;
-
-
-	DPRINT_CONFIG(("%s (0x%p, 0x%p)\n", __func__, idd->idd_pdev,
-							idd->idd_pci_id));
-
-	/* PCI-RT does not bring out serial connections.
-	 * Do not attach to this particular IOC4.
-	 */
-	if (idd->idd_variant == IOC4_VARIANT_PCI_RT)
-		return 0;
-
-	/* request serial registers */
-	tmp_addr1 = idd->idd_bar0 + IOC4_SERIAL_OFFSET;
-
-	if (!request_mem_region(tmp_addr1, sizeof(struct ioc4_serial),
-					"sioc4_uart")) {
-		printk(KERN_WARNING
-			"ioc4 (%p): unable to get request region for "
-				"uart space\n", (void *)idd->idd_pdev);
-		ret = -ENODEV;
-		goto out1;
-	}
-	serial = ioremap(tmp_addr1, sizeof(struct ioc4_serial));
-	if (!serial) {
-		printk(KERN_WARNING
-			 "ioc4 (%p) : unable to remap ioc4 serial register\n",
-				(void *)idd->idd_pdev);
-		ret = -ENODEV;
-		goto out2;
-	}
-	DPRINT_CONFIG(("%s : mem 0x%p, serial 0x%p\n",
-				__func__, (void *)idd->idd_misc_regs,
-				(void *)serial));
-
-	/* Get memory for the new card */
-	control = kzalloc(sizeof(struct ioc4_control), GFP_KERNEL);
-
-	if (!control) {
-		printk(KERN_WARNING "ioc4_attach_one"
-		       ": unable to get memory for the IOC4\n");
-		ret = -ENOMEM;
-		goto out2;
-	}
-	idd->idd_serial_data = control;
-
-	/* Allocate the soft structure */
-	soft = kzalloc(sizeof(struct ioc4_soft), GFP_KERNEL);
-	if (!soft) {
-		printk(KERN_WARNING
-		       "ioc4 (%p): unable to get memory for the soft struct\n",
-		       (void *)idd->idd_pdev);
-		ret = -ENOMEM;
-		goto out3;
-	}
-
-	spin_lock_init(&soft->is_ir_lock);
-	soft->is_ioc4_misc_addr = idd->idd_misc_regs;
-	soft->is_ioc4_serial_addr = serial;
-
-	/* Init the IOC4 */
-	writel(0xf << IOC4_SIO_CR_CMD_PULSE_SHIFT,
-	       &idd->idd_misc_regs->sio_cr.raw);
-
-	/* Enable serial port mode select generic PIO pins as outputs */
-	writel(IOC4_GPCR_UART0_MODESEL | IOC4_GPCR_UART1_MODESEL
-		| IOC4_GPCR_UART2_MODESEL | IOC4_GPCR_UART3_MODESEL,
-		&idd->idd_misc_regs->gpcr_s.raw);
-
-	/* Clear and disable all serial interrupts */
-	write_ireg(soft, ~0, IOC4_W_IEC, IOC4_SIO_INTR_TYPE);
-	writel(~0, &idd->idd_misc_regs->sio_ir.raw);
-	write_ireg(soft, IOC4_OTHER_IR_SER_MEMERR, IOC4_W_IEC,
-		   IOC4_OTHER_INTR_TYPE);
-	writel(IOC4_OTHER_IR_SER_MEMERR, &idd->idd_misc_regs->other_ir.raw);
-	control->ic_soft = soft;
-
-	/* Hook up interrupt handler */
-	if (!request_irq(idd->idd_pdev->irq, ioc4_intr, IRQF_SHARED,
-				"sgi-ioc4serial", soft)) {
-		control->ic_irq = idd->idd_pdev->irq;
-	} else {
-		printk(KERN_WARNING
-		    "%s : request_irq fails for IRQ 0x%x\n ",
-			__func__, idd->idd_pdev->irq);
-	}
-	ret = ioc4_attach_local(idd);
-	if (ret)
-		goto out4;
-
-	/* register port with the serial core - 1 rs232, 1 rs422 */
-
-	ret = ioc4_serial_core_attach(idd->idd_pdev, PROTO_RS232);
-	if (ret)
-		goto out4;
-
-	ret = ioc4_serial_core_attach(idd->idd_pdev, PROTO_RS422);
-	if (ret)
-		goto out5;
-
-	Num_of_ioc4_cards++;
-
-	return ret;
-
-	/* error exits that give back resources */
-out5:
-	ioc4_serial_remove_one(idd);
-	return ret;
-out4:
-	kfree(soft);
-out3:
-	kfree(control);
-out2:
-	if (serial)
-		iounmap(serial);
-	release_mem_region(tmp_addr1, sizeof(struct ioc4_serial));
-out1:
-
-	return ret;
-}
-
-
-static struct ioc4_submodule ioc4_serial_submodule = {
-	.is_name = "IOC4_serial",
-	.is_owner = THIS_MODULE,
-	.is_probe = ioc4_serial_attach_one,
-	.is_remove = ioc4_serial_remove_one,
-};
-
-/**
- * ioc4_serial_init - module init
- */
-static int __init ioc4_serial_init(void)
-{
-	int ret;
-
-	/* register with serial core */
-	if ((ret = uart_register_driver(&ioc4_uart_rs232)) < 0) {
-		printk(KERN_WARNING
-			"%s: Couldn't register rs232 IOC4 serial driver\n",
-			__func__);
-		goto out;
-	}
-	if ((ret = uart_register_driver(&ioc4_uart_rs422)) < 0) {
-		printk(KERN_WARNING
-			"%s: Couldn't register rs422 IOC4 serial driver\n",
-			__func__);
-		goto out_uart_rs232;
-	}
-
-	/* register with IOC4 main module */
-	ret = ioc4_register_submodule(&ioc4_serial_submodule);
-	if (ret)
-		goto out_uart_rs422;
-	return 0;
-
-out_uart_rs422:
-	uart_unregister_driver(&ioc4_uart_rs422);
-out_uart_rs232:
-	uart_unregister_driver(&ioc4_uart_rs232);
-out:
-	return ret;
-}
-
-static void __exit ioc4_serial_exit(void)
-{
-	ioc4_unregister_submodule(&ioc4_serial_submodule);
-	uart_unregister_driver(&ioc4_uart_rs232);
-	uart_unregister_driver(&ioc4_uart_rs422);
-}
-
-late_initcall(ioc4_serial_init); /* Call only after tty init is done */
-module_exit(ioc4_serial_exit);
-
-MODULE_AUTHOR("Pat Gefre - Silicon Graphics Inc. (SGI) <pfg@sgi.com>");
-MODULE_DESCRIPTION("Serial PCI driver module for SGI IOC4 Base-IO Card");
-MODULE_LICENSE("GPL");
diff --git a/drivers/tty/serial/sn_console.c b/drivers/tty/serial/sn_console.c
deleted file mode 100644
index 283493358a62..000000000000
--- a/drivers/tty/serial/sn_console.c
+++ /dev/null
@@ -1,1036 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * C-Brick Serial Port (and console) driver for SGI Altix machines.
- *
- * This driver is NOT suitable for talking to the l1-controller for
- * anything other than 'console activities' --- please use the l1
- * driver for that.
- *
- *
- * Copyright (c) 2004-2006 Silicon Graphics, Inc.  All Rights Reserved.
- *
- * Contact information:  Silicon Graphics, Inc., 1500 Crittenden Lane,
- * Mountain View, CA  94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/NoticeExplan
- */
-
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/sysrq.h>
-#include <linux/circ_buf.h>
-#include <linux/serial_reg.h>
-#include <linux/delay.h> /* for mdelay */
-#include <linux/miscdevice.h>
-#include <linux/serial_core.h>
-
-#include <asm/io.h>
-#include <asm/sn/simulator.h>
-#include <asm/sn/sn_sal.h>
-
-/* number of characters we can transmit to the SAL console at a time */
-#define SN_SAL_MAX_CHARS 120
-
-/* 64K, when we're asynch, it must be at least printk's LOG_BUF_LEN to
- * avoid losing chars, (always has to be a power of 2) */
-#define SN_SAL_BUFFER_SIZE (64 * (1 << 10))
-
-#define SN_SAL_UART_FIFO_DEPTH 16
-#define SN_SAL_UART_FIFO_SPEED_CPS (9600/10)
-
-/* sn_transmit_chars() calling args */
-#define TRANSMIT_BUFFERED	0
-#define TRANSMIT_RAW		1
-
-/* To use dynamic numbers only and not use the assigned major and minor,
- * define the following.. */
-				  /* #define USE_DYNAMIC_MINOR 1 *//* use dynamic minor number */
-#define USE_DYNAMIC_MINOR 0	/* Don't rely on misc_register dynamic minor */
-
-/* Device name we're using */
-#define DEVICE_NAME "ttySG"
-#define DEVICE_NAME_DYNAMIC "ttySG0"	/* need full name for misc_register */
-/* The major/minor we are using, ignored for USE_DYNAMIC_MINOR */
-#define DEVICE_MAJOR 204
-#define DEVICE_MINOR 40
-
-#ifdef CONFIG_MAGIC_SYSRQ
-static char sysrq_serial_str[] = "\eSYS";
-static char *sysrq_serial_ptr = sysrq_serial_str;
-static unsigned long sysrq_requested;
-#endif /* CONFIG_MAGIC_SYSRQ */
-
-/*
- * Port definition - this kinda drives it all
- */
-struct sn_cons_port {
-	struct timer_list sc_timer;
-	struct uart_port sc_port;
-	struct sn_sal_ops {
-		int (*sal_puts_raw) (const char *s, int len);
-		int (*sal_puts) (const char *s, int len);
-		int (*sal_getc) (void);
-		int (*sal_input_pending) (void);
-		void (*sal_wakeup_transmit) (struct sn_cons_port *, int);
-	} *sc_ops;
-	unsigned long sc_interrupt_timeout;
-	int sc_is_asynch;
-};
-
-static struct sn_cons_port sal_console_port;
-static int sn_process_input;
-
-/* Only used if USE_DYNAMIC_MINOR is set to 1 */
-static struct miscdevice misc;	/* used with misc_register for dynamic */
-
-extern void early_sn_setup(void);
-
-#undef DEBUG
-#ifdef DEBUG
-static int sn_debug_printf(const char *fmt, ...);
-#define DPRINTF(x...) sn_debug_printf(x)
-#else
-#define DPRINTF(x...) do { } while (0)
-#endif
-
-/* Prototypes */
-static int snt_hw_puts_raw(const char *, int);
-static int snt_hw_puts_buffered(const char *, int);
-static int snt_poll_getc(void);
-static int snt_poll_input_pending(void);
-static int snt_intr_getc(void);
-static int snt_intr_input_pending(void);
-static void sn_transmit_chars(struct sn_cons_port *, int);
-
-/* A table for polling:
- */
-static struct sn_sal_ops poll_ops = {
-	.sal_puts_raw = snt_hw_puts_raw,
-	.sal_puts = snt_hw_puts_raw,
-	.sal_getc = snt_poll_getc,
-	.sal_input_pending = snt_poll_input_pending
-};
-
-/* A table for interrupts enabled */
-static struct sn_sal_ops intr_ops = {
-	.sal_puts_raw = snt_hw_puts_raw,
-	.sal_puts = snt_hw_puts_buffered,
-	.sal_getc = snt_intr_getc,
-	.sal_input_pending = snt_intr_input_pending,
-	.sal_wakeup_transmit = sn_transmit_chars
-};
-
-/* the console does output in two distinctly different ways:
- * synchronous (raw) and asynchronous (buffered).  initially, early_printk
- * does synchronous output.  any data written goes directly to the SAL
- * to be output (incidentally, it is internally buffered by the SAL)
- * after interrupts and timers are initialized and available for use,
- * the console init code switches to asynchronous output.  this is
- * also the earliest opportunity to begin polling for console input.
- * after console initialization, console output and tty (serial port)
- * output is buffered and sent to the SAL asynchronously (either by
- * timer callback or by UART interrupt) */
-
-/* routines for running the console in polling mode */
-
-/**
- * snt_poll_getc - Get a character from the console in polling mode
- *
- */
-static int snt_poll_getc(void)
-{
-	int ch;
-
-	ia64_sn_console_getc(&ch);
-	return ch;
-}
-
-/**
- * snt_poll_input_pending - Check if any input is waiting - polling mode.
- *
- */
-static int snt_poll_input_pending(void)
-{
-	int status, input;
-
-	status = ia64_sn_console_check(&input);
-	return !status && input;
-}
-
-/* routines for an interrupt driven console (normal) */
-
-/**
- * snt_intr_getc - Get a character from the console, interrupt mode
- *
- */
-static int snt_intr_getc(void)
-{
-	return ia64_sn_console_readc();
-}
-
-/**
- * snt_intr_input_pending - Check if input is pending, interrupt mode
- *
- */
-static int snt_intr_input_pending(void)
-{
-	return ia64_sn_console_intr_status() & SAL_CONSOLE_INTR_RECV;
-}
-
-/* these functions are polled and interrupt */
-
-/**
- * snt_hw_puts_raw - Send raw string to the console, polled or interrupt mode
- * @s: String
- * @len: Length
- *
- */
-static int snt_hw_puts_raw(const char *s, int len)
-{
-	/* this will call the PROM and not return until this is done */
-	return ia64_sn_console_putb(s, len);
-}
-
-/**
- * snt_hw_puts_buffered - Send string to console, polled or interrupt mode
- * @s: String
- * @len: Length
- *
- */
-static int snt_hw_puts_buffered(const char *s, int len)
-{
-	/* queue data to the PROM */
-	return ia64_sn_console_xmit_chars((char *)s, len);
-}
-
-/* uart interface structs
- * These functions are associated with the uart_port that the serial core
- * infrastructure calls.
- *
- * Note: Due to how the console works, many routines are no-ops.
- */
-
-/**
- * snp_type - What type of console are we?
- * @port: Port to operate with (we ignore since we only have one port)
- *
- */
-static const char *snp_type(struct uart_port *port)
-{
-	return ("SGI SN L1");
-}
-
-/**
- * snp_tx_empty - Is the transmitter empty?  We pretend we're always empty
- * @port: Port to operate on (we ignore since we only have one port)
- *
- */
-static unsigned int snp_tx_empty(struct uart_port *port)
-{
-	return 1;
-}
-
-/**
- * snp_stop_tx - stop the transmitter - no-op for us
- * @port: Port to operat eon - we ignore - no-op function
- *
- */
-static void snp_stop_tx(struct uart_port *port)
-{
-}
-
-/**
- * snp_release_port - Free i/o and resources for port - no-op for us
- * @port: Port to operate on - we ignore - no-op function
- *
- */
-static void snp_release_port(struct uart_port *port)
-{
-}
-
-/**
- * snp_shutdown - shut down the port - free irq and disable - no-op for us
- * @port: Port to shut down - we ignore
- *
- */
-static void snp_shutdown(struct uart_port *port)
-{
-}
-
-/**
- * snp_set_mctrl - set control lines (dtr, rts, etc) - no-op for our console
- * @port: Port to operate on - we ignore
- * @mctrl: Lines to set/unset - we ignore
- *
- */
-static void snp_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-}
-
-/**
- * snp_get_mctrl - get contorl line info, we just return a static value
- * @port: port to operate on - we only have one port so we ignore this
- *
- */
-static unsigned int snp_get_mctrl(struct uart_port *port)
-{
-	return TIOCM_CAR | TIOCM_RNG | TIOCM_DSR | TIOCM_CTS;
-}
-
-/**
- * snp_stop_rx - Stop the receiver - we ignor ethis
- * @port: Port to operate on - we ignore
- *
- */
-static void snp_stop_rx(struct uart_port *port)
-{
-}
-
-/**
- * snp_start_tx - Start transmitter
- * @port: Port to operate on
- *
- */
-static void snp_start_tx(struct uart_port *port)
-{
-	if (sal_console_port.sc_ops->sal_wakeup_transmit)
-		sal_console_port.sc_ops->sal_wakeup_transmit(&sal_console_port,
-							     TRANSMIT_BUFFERED);
-
-}
-
-/**
- * snp_break_ctl - handle breaks - ignored by us
- * @port: Port to operate on
- * @break_state: Break state
- *
- */
-static void snp_break_ctl(struct uart_port *port, int break_state)
-{
-}
-
-/**
- * snp_startup - Start up the serial port - always return 0 (We're always on)
- * @port: Port to operate on
- *
- */
-static int snp_startup(struct uart_port *port)
-{
-	return 0;
-}
-
-/**
- * snp_set_termios - set termios stuff - we ignore these
- * @port: port to operate on
- * @termios: New settings
- * @termios: Old
- *
- */
-static void
-snp_set_termios(struct uart_port *port, struct ktermios *termios,
-		struct ktermios *old)
-{
-}
-
-/**
- * snp_request_port - allocate resources for port - ignored by us
- * @port: port to operate on
- *
- */
-static int snp_request_port(struct uart_port *port)
-{
-	return 0;
-}
-
-/**
- * snp_config_port - allocate resources, set up - we ignore,  we're always on
- * @port: Port to operate on
- * @flags: flags used for port setup
- *
- */
-static void snp_config_port(struct uart_port *port, int flags)
-{
-}
-
-/* Associate the uart functions above - given to serial core */
-
-static const struct uart_ops sn_console_ops = {
-	.tx_empty = snp_tx_empty,
-	.set_mctrl = snp_set_mctrl,
-	.get_mctrl = snp_get_mctrl,
-	.stop_tx = snp_stop_tx,
-	.start_tx = snp_start_tx,
-	.stop_rx = snp_stop_rx,
-	.break_ctl = snp_break_ctl,
-	.startup = snp_startup,
-	.shutdown = snp_shutdown,
-	.set_termios = snp_set_termios,
-	.pm = NULL,
-	.type = snp_type,
-	.release_port = snp_release_port,
-	.request_port = snp_request_port,
-	.config_port = snp_config_port,
-	.verify_port = NULL,
-};
-
-/* End of uart struct functions and defines */
-
-#ifdef DEBUG
-
-/**
- * sn_debug_printf - close to hardware debugging printf
- * @fmt: printf format
- *
- * This is as "close to the metal" as we can get, used when the driver
- * itself may be broken.
- *
- */
-static int sn_debug_printf(const char *fmt, ...)
-{
-	static char printk_buf[1024];
-	int printed_len;
-	va_list args;
-
-	va_start(args, fmt);
-	printed_len = vsnprintf(printk_buf, sizeof(printk_buf), fmt, args);
-
-	if (!sal_console_port.sc_ops) {
-		sal_console_port.sc_ops = &poll_ops;
-		early_sn_setup();
-	}
-	sal_console_port.sc_ops->sal_puts_raw(printk_buf, printed_len);
-
-	va_end(args);
-	return printed_len;
-}
-#endif				/* DEBUG */
-
-/*
- * Interrupt handling routines.
- */
-
-/**
- * sn_receive_chars - Grab characters, pass them to tty layer
- * @port: Port to operate on
- * @flags: irq flags
- *
- * Note: If we're not registered with the serial core infrastructure yet,
- * we don't try to send characters to it...
- *
- */
-static void
-sn_receive_chars(struct sn_cons_port *port, unsigned long flags)
-{
-	struct tty_port *tport = NULL;
-	int ch;
-
-	if (!port) {
-		printk(KERN_ERR "sn_receive_chars - port NULL so can't receive\n");
-		return;
-	}
-
-	if (!port->sc_ops) {
-		printk(KERN_ERR "sn_receive_chars - port->sc_ops  NULL so can't receive\n");
-		return;
-	}
-
-	if (port->sc_port.state) {
-		/* The serial_core stuffs are initialized, use them */
-		tport = &port->sc_port.state->port;
-	}
-
-	while (port->sc_ops->sal_input_pending()) {
-		ch = port->sc_ops->sal_getc();
-		if (ch < 0) {
-			printk(KERN_ERR "sn_console: An error occurred while "
-			       "obtaining data from the console (0x%0x)\n", ch);
-			break;
-		}
-#ifdef CONFIG_MAGIC_SYSRQ
-                if (sysrq_requested) {
-                        unsigned long sysrq_timeout = sysrq_requested + HZ*5;
-
-                        sysrq_requested = 0;
-                        if (ch && time_before(jiffies, sysrq_timeout)) {
-                                spin_unlock_irqrestore(&port->sc_port.lock, flags);
-                                handle_sysrq(ch);
-                                spin_lock_irqsave(&port->sc_port.lock, flags);
-                                /* ignore actual sysrq command char */
-                                continue;
-                        }
-                }
-                if (ch == *sysrq_serial_ptr) {
-                        if (!(*++sysrq_serial_ptr)) {
-                                sysrq_requested = jiffies;
-                                sysrq_serial_ptr = sysrq_serial_str;
-                        }
-			/*
-			 * ignore the whole sysrq string except for the
-			 * leading escape
-			 */
-			if (ch != '\e')
-				continue;
-                }
-                else
-			sysrq_serial_ptr = sysrq_serial_str;
-#endif /* CONFIG_MAGIC_SYSRQ */
-
-		/* record the character to pass up to the tty layer */
-		if (tport) {
-			if (tty_insert_flip_char(tport, ch, TTY_NORMAL) == 0)
-				break;
-		}
-		port->sc_port.icount.rx++;
-	}
-
-	if (tport)
-		tty_flip_buffer_push(tport);
-}
-
-/**
- * sn_transmit_chars - grab characters from serial core, send off
- * @port: Port to operate on
- * @raw: Transmit raw or buffered
- *
- * Note: If we're early, before we're registered with serial core, the
- * writes are going through sn_sal_console_write because that's how
- * register_console has been set up.  We currently could have asynch
- * polls calling this function due to sn_sal_switch_to_asynch but we can
- * ignore them until we register with the serial core stuffs.
- *
- */
-static void sn_transmit_chars(struct sn_cons_port *port, int raw)
-{
-	int xmit_count, tail, head, loops, ii;
-	int result;
-	char *start;
-	struct circ_buf *xmit;
-
-	if (!port)
-		return;
-
-	BUG_ON(!port->sc_is_asynch);
-
-	if (port->sc_port.state) {
-		/* We're initialized, using serial core infrastructure */
-		xmit = &port->sc_port.state->xmit;
-	} else {
-		/* Probably sn_sal_switch_to_asynch has been run but serial core isn't
-		 * initialized yet.  Just return.  Writes are going through
-		 * sn_sal_console_write (due to register_console) at this time.
-		 */
-		return;
-	}
-
-	if (uart_circ_empty(xmit) || uart_tx_stopped(&port->sc_port)) {
-		/* Nothing to do. */
-		ia64_sn_console_intr_disable(SAL_CONSOLE_INTR_XMIT);
-		return;
-	}
-
-	head = xmit->head;
-	tail = xmit->tail;
-	start = &xmit->buf[tail];
-
-	/* twice around gets the tail to the end of the buffer and
-	 * then to the head, if needed */
-	loops = (head < tail) ? 2 : 1;
-
-	for (ii = 0; ii < loops; ii++) {
-		xmit_count = (head < tail) ?
-		    (UART_XMIT_SIZE - tail) : (head - tail);
-
-		if (xmit_count > 0) {
-			if (raw == TRANSMIT_RAW)
-				result =
-				    port->sc_ops->sal_puts_raw(start,
-							       xmit_count);
-			else
-				result =
-				    port->sc_ops->sal_puts(start, xmit_count);
-#ifdef DEBUG
-			if (!result)
-				DPRINTF("`");
-#endif
-			if (result > 0) {
-				xmit_count -= result;
-				port->sc_port.icount.tx += result;
-				tail += result;
-				tail &= UART_XMIT_SIZE - 1;
-				xmit->tail = tail;
-				start = &xmit->buf[tail];
-			}
-		}
-	}
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(&port->sc_port);
-
-	if (uart_circ_empty(xmit))
-		snp_stop_tx(&port->sc_port);	/* no-op for us */
-}
-
-/**
- * sn_sal_interrupt - Handle console interrupts
- * @irq: irq #, useful for debug statements
- * @dev_id: our pointer to our port (sn_cons_port which contains the uart port)
- *
- */
-static irqreturn_t sn_sal_interrupt(int irq, void *dev_id)
-{
-	struct sn_cons_port *port = (struct sn_cons_port *)dev_id;
-	unsigned long flags;
-	int status = ia64_sn_console_intr_status();
-
-	if (!port)
-		return IRQ_NONE;
-
-	spin_lock_irqsave(&port->sc_port.lock, flags);
-	if (status & SAL_CONSOLE_INTR_RECV) {
-		sn_receive_chars(port, flags);
-	}
-	if (status & SAL_CONSOLE_INTR_XMIT) {
-		sn_transmit_chars(port, TRANSMIT_BUFFERED);
-	}
-	spin_unlock_irqrestore(&port->sc_port.lock, flags);
-	return IRQ_HANDLED;
-}
-
-/**
- * sn_sal_timer_poll - this function handles polled console mode
- * @data: A pointer to our sn_cons_port (which contains the uart port)
- *
- * data is the pointer that init_timer will store for us.  This function is
- * associated with init_timer to see if there is any console traffic.
- * Obviously not used in interrupt mode
- *
- */
-static void sn_sal_timer_poll(struct timer_list *t)
-{
-	struct sn_cons_port *port = from_timer(port, t, sc_timer);
-	unsigned long flags;
-
-	if (!port)
-		return;
-
-	if (!port->sc_port.irq) {
-		spin_lock_irqsave(&port->sc_port.lock, flags);
-		if (sn_process_input)
-			sn_receive_chars(port, flags);
-		sn_transmit_chars(port, TRANSMIT_RAW);
-		spin_unlock_irqrestore(&port->sc_port.lock, flags);
-		mod_timer(&port->sc_timer,
-			  jiffies + port->sc_interrupt_timeout);
-	}
-}
-
-/*
- * Boot-time initialization code
- */
-
-/**
- * sn_sal_switch_to_asynch - Switch to async mode (as opposed to synch)
- * @port: Our sn_cons_port (which contains the uart port)
- *
- * So this is used by sn_sal_serial_console_init (early on, before we're
- * registered with serial core).  It's also used by sn_sal_init
- * right after we've registered with serial core.  The later only happens
- * if we didn't already come through here via sn_sal_serial_console_init.
- *
- */
-static void __init sn_sal_switch_to_asynch(struct sn_cons_port *port)
-{
-	unsigned long flags;
-
-	if (!port)
-		return;
-
-	DPRINTF("sn_console: about to switch to asynchronous console\n");
-
-	/* without early_printk, we may be invoked late enough to race
-	 * with other cpus doing console IO at this point, however
-	 * console interrupts will never be enabled */
-	spin_lock_irqsave(&port->sc_port.lock, flags);
-
-	/* early_printk invocation may have done this for us */
-	if (!port->sc_ops)
-		port->sc_ops = &poll_ops;
-
-	/* we can't turn on the console interrupt (as request_irq
-	 * calls kmalloc, which isn't set up yet), so we rely on a
-	 * timer to poll for input and push data from the console
-	 * buffer.
-	 */
-	timer_setup(&port->sc_timer, sn_sal_timer_poll, 0);
-
-	if (IS_RUNNING_ON_SIMULATOR())
-		port->sc_interrupt_timeout = 6;
-	else {
-		/* 960cps / 16 char FIFO = 60HZ
-		 * HZ / (SN_SAL_FIFO_SPEED_CPS / SN_SAL_FIFO_DEPTH) */
-		port->sc_interrupt_timeout =
-		    HZ * SN_SAL_UART_FIFO_DEPTH / SN_SAL_UART_FIFO_SPEED_CPS;
-	}
-	mod_timer(&port->sc_timer, jiffies + port->sc_interrupt_timeout);
-
-	port->sc_is_asynch = 1;
-	spin_unlock_irqrestore(&port->sc_port.lock, flags);
-}
-
-/**
- * sn_sal_switch_to_interrupts - Switch to interrupt driven mode
- * @port: Our sn_cons_port (which contains the uart port)
- *
- * In sn_sal_init, after we're registered with serial core and
- * the port is added, this function is called to switch us to interrupt
- * mode.  We were previously in asynch/polling mode (using init_timer).
- *
- * We attempt to switch to interrupt mode here by calling
- * request_irq.  If that works out, we enable receive interrupts.
- */
-static void __init sn_sal_switch_to_interrupts(struct sn_cons_port *port)
-{
-	unsigned long flags;
-
-	if (port) {
-		DPRINTF("sn_console: switching to interrupt driven console\n");
-
-		if (request_irq(SGI_UART_VECTOR, sn_sal_interrupt,
-				IRQF_SHARED,
-				"SAL console driver", port) >= 0) {
-			spin_lock_irqsave(&port->sc_port.lock, flags);
-			port->sc_port.irq = SGI_UART_VECTOR;
-			port->sc_ops = &intr_ops;
-			irq_set_handler(port->sc_port.irq, handle_level_irq);
-
-			/* turn on receive interrupts */
-			ia64_sn_console_intr_enable(SAL_CONSOLE_INTR_RECV);
-			spin_unlock_irqrestore(&port->sc_port.lock, flags);
-		}
-		else {
-			printk(KERN_INFO
-			    "sn_console: console proceeding in polled mode\n");
-		}
-	}
-}
-
-/*
- * Kernel console definitions
- */
-
-static void sn_sal_console_write(struct console *, const char *, unsigned);
-static int sn_sal_console_setup(struct console *, char *);
-static struct uart_driver sal_console_uart;
-extern struct tty_driver *uart_console_device(struct console *, int *);
-
-static struct console sal_console = {
-	.name = DEVICE_NAME,
-	.write = sn_sal_console_write,
-	.device = uart_console_device,
-	.setup = sn_sal_console_setup,
-	.index = -1,		/* unspecified */
-	.data = &sal_console_uart,
-};
-
-#define SAL_CONSOLE	&sal_console
-
-static struct uart_driver sal_console_uart = {
-	.owner = THIS_MODULE,
-	.driver_name = "sn_console",
-	.dev_name = DEVICE_NAME,
-	.major = 0,		/* major/minor set at registration time per USE_DYNAMIC_MINOR */
-	.minor = 0,
-	.nr = 1,		/* one port */
-	.cons = SAL_CONSOLE,
-};
-
-/**
- * sn_sal_init - When the kernel loads us, get us rolling w/ serial core
- *
- * Before this is called, we've been printing kernel messages in a special
- * early mode not making use of the serial core infrastructure.  When our
- * driver is loaded for real, we register the driver and port with serial
- * core and try to enable interrupt driven mode.
- *
- */
-static int __init sn_sal_init(void)
-{
-	int retval;
-
-	if (!ia64_platform_is("sn2"))
-		return 0;
-
-	printk(KERN_INFO "sn_console: Console driver init\n");
-
-	if (USE_DYNAMIC_MINOR == 1) {
-		misc.minor = MISC_DYNAMIC_MINOR;
-		misc.name = DEVICE_NAME_DYNAMIC;
-		retval = misc_register(&misc);
-		if (retval != 0) {
-			printk(KERN_WARNING "Failed to register console "
-			       "device using misc_register.\n");
-			return -ENODEV;
-		}
-		sal_console_uart.major = MISC_MAJOR;
-		sal_console_uart.minor = misc.minor;
-	} else {
-		sal_console_uart.major = DEVICE_MAJOR;
-		sal_console_uart.minor = DEVICE_MINOR;
-	}
-
-	/* We register the driver and the port before switching to interrupts
-	 * or async above so the proper uart structures are populated */
-
-	if (uart_register_driver(&sal_console_uart) < 0) {
-		printk
-		    ("ERROR sn_sal_init failed uart_register_driver, line %d\n",
-		     __LINE__);
-		return -ENODEV;
-	}
-
-	spin_lock_init(&sal_console_port.sc_port.lock);
-
-	/* Setup the port struct with the minimum needed */
-	sal_console_port.sc_port.membase = (char *)1;	/* just needs to be non-zero */
-	sal_console_port.sc_port.type = PORT_16550A;
-	sal_console_port.sc_port.fifosize = SN_SAL_MAX_CHARS;
-	sal_console_port.sc_port.ops = &sn_console_ops;
-	sal_console_port.sc_port.line = 0;
-
-	if (uart_add_one_port(&sal_console_uart, &sal_console_port.sc_port) < 0) {
-		/* error - not sure what I'd do - so I'll do nothing */
-		printk(KERN_ERR "%s: unable to add port\n", __func__);
-	}
-
-	/* when this driver is compiled in, the console initialization
-	 * will have already switched us into asynchronous operation
-	 * before we get here through the initcalls */
-	if (!sal_console_port.sc_is_asynch) {
-		sn_sal_switch_to_asynch(&sal_console_port);
-	}
-
-	/* at this point (device_init) we can try to turn on interrupts */
-	if (!IS_RUNNING_ON_SIMULATOR()) {
-		sn_sal_switch_to_interrupts(&sal_console_port);
-	}
-	sn_process_input = 1;
-	return 0;
-}
-device_initcall(sn_sal_init);
-
-/**
- * puts_raw_fixed - sn_sal_console_write helper for adding \r's as required
- * @puts_raw : puts function to do the writing
- * @s: input string
- * @count: length
- *
- * We need a \r ahead of every \n for direct writes through
- * ia64_sn_console_putb (what sal_puts_raw below actually does).
- *
- */
-
-static void puts_raw_fixed(int (*puts_raw) (const char *s, int len),
-			   const char *s, int count)
-{
-	const char *s1;
-
-	/* Output '\r' before each '\n' */
-	while ((s1 = memchr(s, '\n', count)) != NULL) {
-		puts_raw(s, s1 - s);
-		puts_raw("\r\n", 2);
-		count -= s1 + 1 - s;
-		s = s1 + 1;
-	}
-	puts_raw(s, count);
-}
-
-/**
- * sn_sal_console_write - Print statements before serial core available
- * @console: Console to operate on - we ignore since we have just one
- * @s: String to send
- * @count: length
- *
- * This is referenced in the console struct.  It is used for early
- * console printing before we register with serial core and for things
- * such as kdb.  The console_lock must be held when we get here.
- *
- * This function has some code for trying to print output even if the lock
- * is held.  We try to cover the case where a lock holder could have died.
- * We don't use this special case code if we're not registered with serial
- * core yet.  After we're registered with serial core, the only time this
- * function would be used is for high level kernel output like magic sys req,
- * kdb, and printk's.
- */
-static void
-sn_sal_console_write(struct console *co, const char *s, unsigned count)
-{
-	unsigned long flags = 0;
-	struct sn_cons_port *port = &sal_console_port;
-	static int stole_lock = 0;
-
-	BUG_ON(!port->sc_is_asynch);
-
-	/* We can't look at the xmit buffer if we're not registered with serial core
-	 *  yet.  So only do the fancy recovery after registering
-	 */
-	if (!port->sc_port.state) {
-		/* Not yet registered with serial core - simple case */
-		puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
-		return;
-	}
-
-	/* somebody really wants this output, might be an
-	 * oops, kdb, panic, etc.  make sure they get it. */
-	if (!spin_trylock_irqsave(&port->sc_port.lock, flags)) {
-		int lhead = port->sc_port.state->xmit.head;
-		int ltail = port->sc_port.state->xmit.tail;
-		int counter, got_lock = 0;
-
-		/*
-		 * We attempt to determine if someone has died with the
-		 * lock. We wait ~20 secs after the head and tail ptrs
-		 * stop moving and assume the lock holder is not functional
-		 * and plow ahead. If the lock is freed within the time out
-		 * period we re-get the lock and go ahead normally. We also
-		 * remember if we have plowed ahead so that we don't have
-		 * to wait out the time out period again - the asumption
-		 * is that we will time out again.
-		 */
-
-		for (counter = 0; counter < 150; mdelay(125), counter++) {
-			if (stole_lock)
-				break;
-
-			if (spin_trylock_irqsave(&port->sc_port.lock, flags)) {
-				got_lock = 1;
-				break;
-			} else {
-				/* still locked */
-				if ((lhead != port->sc_port.state->xmit.head)
-				    || (ltail !=
-					port->sc_port.state->xmit.tail)) {
-					lhead =
-						port->sc_port.state->xmit.head;
-					ltail =
-						port->sc_port.state->xmit.tail;
-					counter = 0;
-				}
-			}
-		}
-		/* flush anything in the serial core xmit buffer, raw */
-		sn_transmit_chars(port, 1);
-		if (got_lock) {
-			spin_unlock_irqrestore(&port->sc_port.lock, flags);
-			stole_lock = 0;
-		} else {
-			/* fell thru */
-			stole_lock = 1;
-		}
-		puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
-	} else {
-		stole_lock = 0;
-		sn_transmit_chars(port, 1);
-		spin_unlock_irqrestore(&port->sc_port.lock, flags);
-
-		puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
-	}
-}
-
-
-/**
- * sn_sal_console_setup - Set up console for early printing
- * @co: Console to work with
- * @options: Options to set
- *
- * Altix console doesn't do anything with baud rates, etc, anyway.
- *
- * This isn't required since not providing the setup function in the
- * console struct is ok.  However, other patches like KDB plop something
- * here so providing it is easier.
- *
- */
-static int sn_sal_console_setup(struct console *co, char *options)
-{
-	return 0;
-}
-
-/**
- * sn_sal_console_write_early - simple early output routine
- * @co - console struct
- * @s - string to print
- * @count - count
- *
- * Simple function to provide early output, before even
- * sn_sal_serial_console_init is called.  Referenced in the
- * console struct registerd in sn_serial_console_early_setup.
- *
- */
-static void __init
-sn_sal_console_write_early(struct console *co, const char *s, unsigned count)
-{
-	puts_raw_fixed(sal_console_port.sc_ops->sal_puts_raw, s, count);
-}
-
-/* Used for very early console printing - again, before
- * sn_sal_serial_console_init is run */
-static struct console sal_console_early __initdata = {
-	.name = "sn_sal",
-	.write = sn_sal_console_write_early,
-	.flags = CON_PRINTBUFFER,
-	.index = -1,
-};
-
-/**
- * sn_serial_console_early_setup - Sets up early console output support
- *
- * Register a console early on...  This is for output before even
- * sn_sal_serial_cosnole_init is called.  This function is called from
- * setup.c.  This allows us to do really early polled writes. When
- * sn_sal_serial_console_init is called, this console is unregistered
- * and a new one registered.
- */
-int __init sn_serial_console_early_setup(void)
-{
-	if (!ia64_platform_is("sn2"))
-		return -1;
-
-	sal_console_port.sc_ops = &poll_ops;
-	spin_lock_init(&sal_console_port.sc_port.lock);
-	early_sn_setup();	/* Find SAL entry points */
-	register_console(&sal_console_early);
-
-	return 0;
-}
-
-/**
- * sn_sal_serial_console_init - Early console output - set up for register
- *
- * This function is called when regular console init happens.  Because we
- * support even earlier console output with sn_serial_console_early_setup
- * (called from setup.c directly), this function unregisters the really
- * early console.
- *
- * Note: Even if setup.c doesn't register sal_console_early, unregistering
- * it here doesn't hurt anything.
- *
- */
-static int __init sn_sal_serial_console_init(void)
-{
-	if (ia64_platform_is("sn2")) {
-		sn_sal_switch_to_asynch(&sal_console_port);
-		DPRINTF("sn_sal_serial_console_init : register console\n");
-		register_console(&sal_console);
-		unregister_console(&sal_console_early);
-	}
-	return 0;
-}
-
-console_initcall(sn_sal_serial_console_init);
author	Linus Torvalds	2019-09-16 15:32:01 -0700
committer	Linus Torvalds	2019-09-16 15:32:01 -0700
commit	76f0f227cffb570bc5ce343b1750f14907371d80 (patch)
tree	7bbbf7174a7c7cc834936a18a73fc95161b4228e /drivers
parent	58d4fafd0b4c36838077a5d7b17df537b7226f1c (diff)
parent	0d3d343560bad8e1b7879fe94251cfe731a2dd13 (diff)