diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/pci/Makefile | 3 | ||||
| -rw-r--r-- | drivers/pci/htirq.c | 135 |
3 files changed, 0 insertions, 147 deletions
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index c32a77fc8b03..99ae5e30eabe 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -71,15 +71,6 @@ config XEN_PCIDEV_FRONTEND The PCI device frontend driver allows the kernel to import arbitrary PCI devices from a PCI backend to support PCI driver domains. -config HT_IRQ - bool "Interrupts on hypertransport devices" - default y - depends on PCI && X86_LOCAL_APIC - help - This allows native hypertransport devices to use interrupts. - - If unsure say Y. - config PCI_ATS bool diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile index 80adbdbcecce..ab0104e0ffac 100644 --- a/drivers/pci/Makefile +++ b/drivers/pci/Makefile @@ -24,9 +24,6 @@ endif # Build the PCI MSI interrupt support obj-$(CONFIG_PCI_MSI) += msi.o -# Build the Hypertransport interrupt support -obj-$(CONFIG_HT_IRQ) += htirq.o - obj-$(CONFIG_PCI_ATS) += ats.o obj-$(CONFIG_PCI_IOV) += iov.o diff --git a/drivers/pci/htirq.c b/drivers/pci/htirq.c deleted file mode 100644 index bb88c26f5144..000000000000 --- a/drivers/pci/htirq.c +++ /dev/null @@ -1,135 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * File: htirq.c - * Purpose: Hypertransport Interrupt Capability - * - * Copyright (C) 2006 Linux Networx - * Copyright (C) Eric Biederman <ebiederman@lnxi.com> - */ - -#include <linux/irq.h> -#include <linux/pci.h> -#include <linux/spinlock.h> -#include <linux/export.h> -#include <linux/slab.h> -#include <linux/htirq.h> - -/* Global ht irq lock. - * - * This is needed to serialize access to the data port in hypertransport - * irq capability. - * - * With multiple simultaneous hypertransport irq devices it might pay - * to make this more fine grained. But start with simple, stupid, and correct. - */ -static DEFINE_SPINLOCK(ht_irq_lock); - -void write_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg) -{ - struct ht_irq_cfg *cfg = irq_get_handler_data(irq); - unsigned long flags; - - spin_lock_irqsave(&ht_irq_lock, flags); - if (cfg->msg.address_lo != msg->address_lo) { - pci_write_config_byte(cfg->dev, cfg->pos + 2, cfg->idx); - pci_write_config_dword(cfg->dev, cfg->pos + 4, msg->address_lo); - } - if (cfg->msg.address_hi != msg->address_hi) { - pci_write_config_byte(cfg->dev, cfg->pos + 2, cfg->idx + 1); - pci_write_config_dword(cfg->dev, cfg->pos + 4, msg->address_hi); - } - if (cfg->update) - cfg->update(cfg->dev, irq, msg); - spin_unlock_irqrestore(&ht_irq_lock, flags); - cfg->msg = *msg; -} - -void fetch_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg) -{ - struct ht_irq_cfg *cfg = irq_get_handler_data(irq); - - *msg = cfg->msg; -} - -void mask_ht_irq(struct irq_data *data) -{ - struct ht_irq_cfg *cfg = irq_data_get_irq_handler_data(data); - struct ht_irq_msg msg = cfg->msg; - - msg.address_lo |= 1; - write_ht_irq_msg(data->irq, &msg); -} - -void unmask_ht_irq(struct irq_data *data) -{ - struct ht_irq_cfg *cfg = irq_data_get_irq_handler_data(data); - struct ht_irq_msg msg = cfg->msg; - - msg.address_lo &= ~1; - write_ht_irq_msg(data->irq, &msg); -} - -/** - * __ht_create_irq - create an irq and attach it to a device. - * @dev: The hypertransport device to find the irq capability on. - * @idx: Which of the possible irqs to attach to. - * @update: Function to be called when changing the htirq message - * - * The irq number of the new irq or a negative error value is returned. - */ -int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update) -{ - int max_irq, pos, irq; - unsigned long flags; - u32 data; - - pos = pci_find_ht_capability(dev, HT_CAPTYPE_IRQ); - if (!pos) - return -EINVAL; - - /* Verify the idx I want to use is in range */ - spin_lock_irqsave(&ht_irq_lock, flags); - pci_write_config_byte(dev, pos + 2, 1); - pci_read_config_dword(dev, pos + 4, &data); - spin_unlock_irqrestore(&ht_irq_lock, flags); - - max_irq = (data >> 16) & 0xff; - if (idx > max_irq) - return -EINVAL; - - irq = arch_setup_ht_irq(idx, pos, dev, update); - if (irq > 0) - dev_dbg(&dev->dev, "irq %d for HT\n", irq); - - return irq; -} -EXPORT_SYMBOL(__ht_create_irq); - -/** - * ht_create_irq - create an irq and attach it to a device. - * @dev: The hypertransport device to find the irq capability on. - * @idx: Which of the possible irqs to attach to. - * - * ht_create_irq needs to be called for all hypertransport devices - * that generate irqs. - * - * The irq number of the new irq or a negative error value is returned. - */ -int ht_create_irq(struct pci_dev *dev, int idx) -{ - return __ht_create_irq(dev, idx, NULL); -} -EXPORT_SYMBOL(ht_create_irq); - -/** - * ht_destroy_irq - destroy an irq created with ht_create_irq - * @irq: irq to be destroyed - * - * This reverses ht_create_irq removing the specified irq from - * existence. The irq should be free before this happens. - */ -void ht_destroy_irq(unsigned int irq) -{ - arch_teardown_ht_irq(irq); -} -EXPORT_SYMBOL(ht_destroy_irq); |