From 34a2e15e95fce6d6f4d30162f53a0ceb25d5bbaf Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Mon, 25 Aug 2008 15:45:20 -0600 Subject: PCI: follow lspci device/vendor style Use "[%04x:%04x]" for PCI vendor/device IDs to follow the format used by lspci(8). Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- drivers/pci/probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/pci/probe.c') diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index d3db8b249729..578d15f49e02 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -762,7 +762,7 @@ static int pci_setup_device(struct pci_dev * dev) dev->class = class; class >>= 8; - dev_dbg(&dev->dev, "found [%04x/%04x] class %06x header type %02x\n", + dev_dbg(&dev->dev, "found [%04x:%04x] class %06x header type %02x\n", dev->vendor, dev->device, class, dev->hdr_type); /* "Unknown power state" */ -- cgit v1.2.3 From cef354db0d7a7207ea78c716753d9216a9c2b7e1 Mon Sep 17 00:00:00 2001 From: Alex Chiang Date: Tue, 2 Sep 2008 09:40:51 -0600 Subject: PCI: connect struct pci_dev to struct pci_slot The introduction of struct pci_slot (f46753c5e354b857b20ab8e0fe7b25) added a struct pci_slot pointer to struct pci_dev, but we forgot to associate the two. Connect the two structs together; the interesting portions of the object lifetimes are: - when a new pci_slot is created, connect it to the appropriate pci_dev's. A single pci_slot may be associated with multiple pci_dev's, e.g. any multi-function PCI device. - when a pci_slot is released, look for all the pci_dev's it was associated with, and set their pci_slot pointers to NULL - when a pci_dev is created, look for slots to associate with. Note -- when a pci_dev is released, we don't need to do any bookkeeping, since pci_slot's do not have pointers to pci_dev's. Signed-off-by: Alex Chiang Signed-off-by: Jesse Barnes --- drivers/pci/probe.c | 5 +++++ drivers/pci/slot.c | 10 ++++++++++ 2 files changed, 15 insertions(+) (limited to 'drivers/pci/probe.c') diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 578d15f49e02..7aa71636dd3c 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -949,6 +949,7 @@ EXPORT_SYMBOL(alloc_pci_dev); static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn) { struct pci_dev *dev; + struct pci_slot *slot; u32 l; u8 hdr_type; int delay = 1; @@ -997,6 +998,10 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn) dev->error_state = pci_channel_io_normal; set_pcie_port_type(dev); + list_for_each_entry(slot, &bus->slots, list) + if (PCI_SLOT(devfn) == slot->number) + dev->slot = slot; + /* Assume 32-bit PCI; let 64-bit PCI cards (which are far rarer) set this higher, assuming the system even supports it. */ dev->dma_mask = 0xffffffff; diff --git a/drivers/pci/slot.c b/drivers/pci/slot.c index 7e5b85cbd948..0c6db03698ea 100644 --- a/drivers/pci/slot.c +++ b/drivers/pci/slot.c @@ -49,11 +49,16 @@ static ssize_t address_read_file(struct pci_slot *slot, char *buf) static void pci_slot_release(struct kobject *kobj) { + struct pci_dev *dev; struct pci_slot *slot = to_pci_slot(kobj); pr_debug("%s: releasing pci_slot on %x:%d\n", __func__, slot->bus->number, slot->number); + list_for_each_entry(dev, &slot->bus->devices, bus_list) + if (PCI_SLOT(dev->devfn) == slot->number) + dev->slot = NULL; + list_del(&slot->list); kfree(slot); @@ -108,6 +113,7 @@ static struct kobj_type pci_slot_ktype = { struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr, const char *name) { + struct pci_dev *dev; struct pci_slot *slot; int err; @@ -150,6 +156,10 @@ placeholder: INIT_LIST_HEAD(&slot->list); list_add(&slot->list, &parent->slots); + list_for_each_entry(dev, &parent->devices, bus_list) + if (PCI_SLOT(dev->devfn) == slot_nr) + dev->slot = slot; + /* Don't care if debug printk has a -1 for slot_nr */ pr_debug("%s: created pci_slot on %04x:%02x:%02x\n", __func__, pci_domain_nr(parent), parent->number, slot_nr); -- cgit v1.2.3 From 557848c3c03ad1d1e66cb3b5b06698e3a9ebc33c Mon Sep 17 00:00:00 2001 From: Zhao, Yu Date: Mon, 13 Oct 2008 19:18:07 +0800 Subject: PCI: replace cfg space size (256/4096) by macros. This is a cleanup that changes all PCI configuration space size representations to the macros (PCI_CFG_SPACE_SIZE and PCI_CFG_SPACE_EXP_SIZE). And the macros are also moved from drivers/pci/probe.c to drivers/pci/pci.h. Signed-off-by: Yu Zhao Signed-off-by: Jesse Barnes --- drivers/pci/pci-sysfs.c | 10 +++++----- drivers/pci/pci.c | 11 +++++++---- drivers/pci/pci.h | 7 +++++++ drivers/pci/probe.c | 5 ++--- 4 files changed, 21 insertions(+), 12 deletions(-) (limited to 'drivers/pci/probe.c') diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 77baff022f71..00a9947cb7cc 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -715,7 +715,7 @@ static struct bin_attribute pci_config_attr = { .name = "config", .mode = S_IRUGO | S_IWUSR, }, - .size = 256, + .size = PCI_CFG_SPACE_SIZE, .read = pci_read_config, .write = pci_write_config, }; @@ -725,7 +725,7 @@ static struct bin_attribute pcie_config_attr = { .name = "config", .mode = S_IRUGO | S_IWUSR, }, - .size = 4096, + .size = PCI_CFG_SPACE_EXP_SIZE, .read = pci_read_config, .write = pci_write_config, }; @@ -743,7 +743,7 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev) if (!sysfs_initialized) return -EACCES; - if (pdev->cfg_size < 4096) + if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); else retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); @@ -814,7 +814,7 @@ err_vpd: kfree(pdev->vpd->attr); } err_config_file: - if (pdev->cfg_size < 4096) + if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); else sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); @@ -839,7 +839,7 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev) sysfs_remove_bin_file(&pdev->dev.kobj, pdev->vpd->attr); kfree(pdev->vpd->attr); } - if (pdev->cfg_size < 4096) + if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); else sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 09dc893c81db..553ca6657955 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -213,10 +213,13 @@ int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap) int pci_find_ext_capability(struct pci_dev *dev, int cap) { u32 header; - int ttl = 480; /* 3840 bytes, minimum 8 bytes per capability */ - int pos = 0x100; + int ttl; + int pos = PCI_CFG_SPACE_SIZE; - if (dev->cfg_size <= 256) + /* minimum 8 bytes per capability */ + ttl = (PCI_CFG_SPACE_EXP_SIZE - PCI_CFG_SPACE_SIZE) / 8; + + if (dev->cfg_size <= PCI_CFG_SPACE_SIZE) return 0; if (pci_read_config_dword(dev, pos, &header) != PCIBIOS_SUCCESSFUL) @@ -234,7 +237,7 @@ int pci_find_ext_capability(struct pci_dev *dev, int cap) return pos; pos = PCI_EXT_CAP_NEXT(header); - if (pos < 0x100) + if (pos < PCI_CFG_SPACE_SIZE) break; if (pci_read_config_dword(dev, pos, &header) != PCIBIOS_SUCCESSFUL) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 4723b12fb39a..601abdc8dd9f 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -1,3 +1,9 @@ +#ifndef DRIVERS_PCI_H +#define DRIVERS_PCI_H + +#define PCI_CFG_SPACE_SIZE 256 +#define PCI_CFG_SPACE_EXP_SIZE 4096 + /* Functions internal to the PCI core code */ extern int pci_uevent(struct device *dev, struct kobj_uevent_env *env); @@ -145,3 +151,4 @@ struct pci_slot_attribute { }; #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr) +#endif /* DRIVERS_PCI_H */ diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 7aa71636dd3c..f6754e87f046 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -14,8 +14,6 @@ #define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */ #define CARDBUS_RESERVE_BUSNR 3 -#define PCI_CFG_SPACE_SIZE 256 -#define PCI_CFG_SPACE_EXP_SIZE 4096 /* Ugh. Need to stop exporting this to modules. */ LIST_HEAD(pci_root_buses); @@ -887,8 +885,9 @@ static void set_pcie_port_type(struct pci_dev *pdev) int pci_cfg_space_size_ext(struct pci_dev *dev) { u32 status; + int pos = PCI_CFG_SPACE_SIZE; - if (pci_read_config_dword(dev, 256, &status) != PCIBIOS_SUCCESSFUL) + if (pci_read_config_dword(dev, pos, &status) != PCIBIOS_SUCCESSFUL) goto fail; if (status == 0xffffffff) goto fail; -- cgit v1.2.3 From e354597cce8d219d135d65e585dc4f30323486b9 Mon Sep 17 00:00:00 2001 From: Peter Chubb Date: Mon, 13 Oct 2008 11:49:04 +1100 Subject: PCI: fix 64-vbit prefetchable memory resource BARs Since patch 6ac665c63dcac8fcec534a1d224ecbb8b867ad59 my infiniband controller hasn't worked. This is because it has 64-bit prefetchable memory, which was mistakenly being taken to be 32-bit memory. The resource flags in this case are PCI_BASE_ADDRESS_MEM_TYPE_64 | PCI_BASE_ADDRESS_MEM_PREFETCH. This patch checks only for the PCI_BASE_ADDRESS_MEM_TYPE_64 bit; thus whether the region is prefetchable or not is ignored. This fixes my Infiniband. Reviewed-by: Matthew Wilcox Signed-off-by: Peter Chubb Signed-off-by: Jesse Barnes --- drivers/pci/probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/pci/probe.c') diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index f6754e87f046..49599ac49bda 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -217,7 +217,7 @@ static inline enum pci_bar_type decode_bar(struct resource *res, u32 bar) res->flags = bar & ~PCI_BASE_ADDRESS_MEM_MASK; - if (res->flags == PCI_BASE_ADDRESS_MEM_TYPE_64) + if (res->flags & PCI_BASE_ADDRESS_MEM_TYPE_64) return pci_bar_mem64; return pci_bar_mem32; } -- cgit v1.2.3 From 201de56eb22f1ff3f36804bc70cbff220b50f067 Mon Sep 17 00:00:00 2001 From: Zhao, Yu Date: Mon, 13 Oct 2008 19:49:55 +0800 Subject: PCI: centralize the capabilities code in probe.c This patch centralizes the initialization and release functions of various PCI capabilities in probe.c, which makes the introduction of new capability support functions cleaner in the future. Signed-off-by: Yu Zhao Signed-off-by: Jesse Barnes --- drivers/pci/probe.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) (limited to 'drivers/pci/probe.c') diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 49599ac49bda..8c158b9abd41 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -842,6 +842,11 @@ static int pci_setup_device(struct pci_dev * dev) return 0; } +static void pci_release_capabilities(struct pci_dev *dev) +{ + pci_vpd_release(dev); +} + /** * pci_release_dev - free a pci device structure when all users of it are finished. * @dev: device that's been disconnected @@ -854,7 +859,7 @@ static void pci_release_dev(struct device *dev) struct pci_dev *pci_dev; pci_dev = to_pci_dev(dev); - pci_vpd_release(pci_dev); + pci_release_capabilities(pci_dev); kfree(pci_dev); } @@ -935,8 +940,6 @@ struct pci_dev *alloc_pci_dev(void) INIT_LIST_HEAD(&dev->bus_list); - pci_msi_init_pci_dev(dev); - return dev; } EXPORT_SYMBOL(alloc_pci_dev); @@ -1009,11 +1012,21 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn) return NULL; } - pci_vpd_pci22_init(dev); - return dev; } +static void pci_init_capabilities(struct pci_dev *dev) +{ + /* MSI/MSI-X list */ + pci_msi_init_pci_dev(dev); + + /* Power Management */ + pci_pm_init(dev); + + /* Vital Product Data */ + pci_vpd_pci22_init(dev); +} + void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) { device_initialize(&dev->dev); @@ -1030,8 +1043,8 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) /* Fix up broken headers */ pci_fixup_device(pci_fixup_header, dev); - /* Initialize power management of the device */ - pci_pm_init(dev); + /* Initialize various capabilities */ + pci_init_capabilities(dev); /* * Add the device to our list of discovered devices -- cgit v1.2.3 From 58c3a727cb73b75a9104d295f096cca12959a5a5 Mon Sep 17 00:00:00 2001 From: Yu Zhao Date: Tue, 14 Oct 2008 14:02:53 +0800 Subject: PCI: support PCIe ARI capability This patch adds support for PCI Express Alternative Routing-ID Interpretation (ARI) capability. The ARI capability extends the Function Number field of the PCI Express Endpoint by reusing the Device Number which is otherwise hardwired to 0. With ARI, an Endpoint can have up to 256 functions. Signed-off-by: Yu Zhao Signed-off-by: Jesse Barnes --- drivers/pci/pci.c | 32 ++++++++++++++++++++++++++++++++ drivers/pci/pci.h | 12 ++++++++++++ drivers/pci/probe.c | 3 +++ include/linux/pci.h | 1 + include/linux/pci_regs.h | 14 ++++++++++++++ 5 files changed, 62 insertions(+) (limited to 'drivers/pci/probe.c') diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 553ca6657955..4db261e13e69 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1299,6 +1299,38 @@ void pci_pm_init(struct pci_dev *dev) } } +/** + * pci_enable_ari - enable ARI forwarding if hardware support it + * @dev: the PCI device + */ +void pci_enable_ari(struct pci_dev *dev) +{ + int pos; + u32 cap; + u16 ctrl; + + if (!dev->is_pcie) + return; + + if (dev->pcie_type != PCI_EXP_TYPE_ROOT_PORT && + dev->pcie_type != PCI_EXP_TYPE_DOWNSTREAM) + return; + + pos = pci_find_capability(dev, PCI_CAP_ID_EXP); + if (!pos) + return; + + pci_read_config_dword(dev, pos + PCI_EXP_DEVCAP2, &cap); + if (!(cap & PCI_EXP_DEVCAP2_ARI)) + return; + + pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl); + ctrl |= PCI_EXP_DEVCTL2_ARI; + pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl); + + dev->ari_enabled = 1; +} + int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge) { diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 601abdc8dd9f..39684c1415c5 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -151,4 +151,16 @@ struct pci_slot_attribute { }; #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr) +extern void pci_enable_ari(struct pci_dev *dev); +/** + * pci_ari_enabled - query ARI forwarding status + * @dev: the PCI device + * + * Returns 1 if ARI forwarding is enabled, or 0 if not enabled; + */ +static inline int pci_ari_enabled(struct pci_dev *dev) +{ + return dev->ari_enabled; +} + #endif /* DRIVERS_PCI_H */ diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 8c158b9abd41..3141e8deeac4 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1025,6 +1025,9 @@ static void pci_init_capabilities(struct pci_dev *dev) /* Vital Product Data */ pci_vpd_pci22_init(dev); + + /* Alternative Routing-ID Forwarding */ + pci_enable_ari(dev); } void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) diff --git a/include/linux/pci.h b/include/linux/pci.h index 008005674b60..7e9a1f0715e6 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -214,6 +214,7 @@ struct pci_dev { unsigned int broken_parity_status:1; /* Device generates false positive parity */ unsigned int msi_enabled:1; unsigned int msix_enabled:1; + unsigned int ari_enabled:1; /* ARI forwarding */ unsigned int is_managed:1; unsigned int is_pcie:1; pci_dev_flags_t dev_flags; diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h index 450684f7eaac..eb6686b88f9a 100644 --- a/include/linux/pci_regs.h +++ b/include/linux/pci_regs.h @@ -419,6 +419,10 @@ #define PCI_EXP_RTCTL_CRSSVE 0x10 /* CRS Software Visibility Enable */ #define PCI_EXP_RTCAP 30 /* Root Capabilities */ #define PCI_EXP_RTSTA 32 /* Root Status */ +#define PCI_EXP_DEVCAP2 36 /* Device Capabilities 2 */ +#define PCI_EXP_DEVCAP2_ARI 0x20 /* Alternative Routing-ID */ +#define PCI_EXP_DEVCTL2 40 /* Device Control 2 */ +#define PCI_EXP_DEVCTL2_ARI 0x20 /* Alternative Routing-ID */ /* Extended Capabilities (PCI-X 2.0 and Express) */ #define PCI_EXT_CAP_ID(header) (header & 0x0000ffff) @@ -429,6 +433,7 @@ #define PCI_EXT_CAP_ID_VC 2 #define PCI_EXT_CAP_ID_DSN 3 #define PCI_EXT_CAP_ID_PWR 4 +#define PCI_EXT_CAP_ID_ARI 14 /* Advanced Error Reporting */ #define PCI_ERR_UNCOR_STATUS 4 /* Uncorrectable Error Status */ @@ -536,5 +541,14 @@ #define HT_CAPTYPE_GEN3 0xD0 /* Generation 3 hypertransport configuration */ #define HT_CAPTYPE_PM 0xE0 /* Hypertransport powermanagement configuration */ +/* Alternative Routing-ID Interpretation */ +#define PCI_ARI_CAP 0x04 /* ARI Capability Register */ +#define PCI_ARI_CAP_MFVC 0x0001 /* MFVC Function Groups Capability */ +#define PCI_ARI_CAP_ACS 0x0002 /* ACS Function Groups Capability */ +#define PCI_ARI_CAP_NFN(x) (((x) >> 8) & 0xff) /* Next Function Number */ +#define PCI_ARI_CTRL 0x06 /* ARI Control Register */ +#define PCI_ARI_CTRL_MFVC 0x0001 /* MFVC Function Groups Enable */ +#define PCI_ARI_CTRL_ACS 0x0002 /* ACS Function Groups Enable */ +#define PCI_ARI_CTRL_FG(x) (((x) >> 4) & 7) /* Function Group */ #endif /* LINUX_PCI_REGS_H */ -- cgit v1.2.3 From f393d9b130423a7a47c751b26df07ceaa5dc76a9 Mon Sep 17 00:00:00 2001 From: Vincent Legoll Date: Sun, 12 Oct 2008 12:26:12 +0200 Subject: PCI: probing debug message uniformization This patch uniformizes PCI probing debug boot messages with dev_printk() intead of manual printk() It changes adress range output from [%llx, %llx] to [%#llx-%#llx], like in pci_request_region(). For example, it goes from the mixed-style: PCI: 0000:00:1b.0 reg 10 64bit mmio: [f4280000, f4283fff] pci 0000:00:1b.0: PME# supported from D0 D3hot D3cold to uniform: pci 0000:00:1b.0: reg 10 64bit mmio: [0xf4280000-0xf4283fff] pci 0000:00:1b.0: PME# supported from D0 D3hot D3cold This patch has been runtime tested, boot log messages diffed, everything looks OK. Acked-by: Bjorn Helgaas Signed-off-by: Vincent Legoll Signed-off-by: Jesse Barnes --- drivers/pci/pcie/aspm.c | 6 +++--- drivers/pci/probe.c | 25 ++++++++++++------------- 2 files changed, 15 insertions(+), 16 deletions(-) (limited to 'drivers/pci/probe.c') diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index 851f5b83cdbc..8f63f4c6b85f 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -528,9 +528,9 @@ static int pcie_aspm_sanity_check(struct pci_dev *pdev) pci_read_config_dword(child_dev, child_pos + PCI_EXP_DEVCAP, ®32); if (!(reg32 & PCI_EXP_DEVCAP_RBER) && !aspm_force) { - printk("Pre-1.1 PCIe device detected, " - "disable ASPM for %s. It can be enabled forcedly" - " with 'pcie_aspm=force'\n", pci_name(pdev)); + dev_printk(KERN_INFO, &child_dev->dev, "disabling ASPM" + " on pre-1.1 PCIe device. You can enable it" + " with 'pcie_aspm=force'\n"); return -EINVAL; } } diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 3141e8deeac4..afb9f1c0bc28 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -302,8 +302,8 @@ static int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, } else { res->start = l64; res->end = l64 + sz64; - printk(KERN_DEBUG "PCI: %s reg %x 64bit mmio: %pR\n", - pci_name(dev), pos, res); + dev_printk(KERN_DEBUG, &dev->dev, + "reg %x 64bit mmio: %pR\n", pos, res); } } else { sz = pci_size(l, sz, mask); @@ -313,10 +313,10 @@ static int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, res->start = l; res->end = l + sz; - printk(KERN_DEBUG "PCI: %s reg %x %s: %pR\n", - pci_name(dev), pos, - (res->flags & IORESOURCE_IO) ? "io port":"32bit mmio", - res); + + dev_printk(KERN_DEBUG, &dev->dev, "reg %x %s: %pR\n", pos, + (res->flags & IORESOURCE_IO) ? "io port" : "32bit mmio", + res); } out: @@ -387,8 +387,7 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child) res->start = base; if (!res->end) res->end = limit + 0xfff; - printk(KERN_DEBUG "PCI: bridge %s io port: %pR\n", - pci_name(dev), res); + dev_printk(KERN_DEBUG, &dev->dev, "bridge io port: %pR\n", res); } res = child->resource[1]; @@ -400,8 +399,8 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child) res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM; res->start = base; res->end = limit + 0xfffff; - printk(KERN_DEBUG "PCI: bridge %s 32bit mmio: %pR\n", - pci_name(dev), res); + dev_printk(KERN_DEBUG, &dev->dev, "bridge 32bit mmio: %pR\n", + res); } res = child->resource[2]; @@ -437,9 +436,9 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child) res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM | IORESOURCE_PREFETCH; res->start = base; res->end = limit + 0xfffff; - printk(KERN_DEBUG "PCI: bridge %s %sbit mmio pref: %pR\n", - pci_name(dev), - (res->flags & PCI_PREF_RANGE_TYPE_64) ? "64":"32", res); + dev_printk(KERN_DEBUG, &dev->dev, "bridge %sbit mmio pref: %pR\n", + (res->flags & PCI_PREF_RANGE_TYPE_64) ? "64" : "32", + res); } } -- cgit v1.2.3 From f19aeb1f3638b7bb4ca21eb361f004fac2bfe259 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Fri, 3 Oct 2008 19:49:32 +1000 Subject: PCI: Add ability to mmap legacy_io on some platforms This adds the ability to mmap legacy IO space to the legacy_io files in sysfs on platforms that support it. This will allow to clean up X to use this instead of /dev/mem for legacy IO accesses such as those performed by Int10. While at it I moved pci_create/remove_legacy_files() to pci-sysfs.c where I think they belong, thus making more things statis in there and cleaned up some spurrious prototypes in the ia64 pci.h file Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Jesse Barnes --- arch/ia64/include/asm/pci.h | 12 +----- arch/ia64/pci/pci.c | 7 +++- drivers/pci/pci-sysfs.c | 93 ++++++++++++++++++++++++++++++++++++++++++--- drivers/pci/pci.h | 6 +++ drivers/pci/probe.c | 66 -------------------------------- 5 files changed, 102 insertions(+), 82 deletions(-) (limited to 'drivers/pci/probe.c') diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h index 0149097b736d..ce342fb74246 100644 --- a/arch/ia64/include/asm/pci.h +++ b/arch/ia64/include/asm/pci.h @@ -95,16 +95,8 @@ extern int pci_mmap_page_range (struct pci_dev *dev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state, int write_combine); #define HAVE_PCI_LEGACY extern int pci_mmap_legacy_page_range(struct pci_bus *bus, - struct vm_area_struct *vma); -extern ssize_t pci_read_legacy_io(struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t off, size_t count); -extern ssize_t pci_write_legacy_io(struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t off, size_t count); -extern int pci_mmap_legacy_mem(struct kobject *kobj, - struct bin_attribute *attr, - struct vm_area_struct *vma); + struct vm_area_struct *vma, + enum pci_mmap_state mmap_state); #define pci_get_legacy_mem platform_pci_get_legacy_mem #define pci_legacy_read platform_pci_legacy_read diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index 7545037a8625..211fcfd115f9 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -614,12 +614,17 @@ char *ia64_pci_get_legacy_mem(struct pci_bus *bus) * vector to get the base address. */ int -pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma) +pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma, + enum pci_mmap_state mmap_state) { unsigned long size = vma->vm_end - vma->vm_start; pgprot_t prot; char *addr; + /* We only support mmap'ing of legacy memory space */ + if (mmap_state != pci_mmap_mem) + return -ENOSYS; + /* * Avoid attribute aliasing. See Documentation/ia64/aliasing.txt * for more details. diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 2cad6da2e4aa..110022d78689 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -423,7 +423,7 @@ pci_write_vpd(struct kobject *kobj, struct bin_attribute *bin_attr, * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific * callback routine (pci_legacy_read). */ -ssize_t +static ssize_t pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { @@ -448,7 +448,7 @@ pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific * callback routine (pci_legacy_write). */ -ssize_t +static ssize_t pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { @@ -468,11 +468,11 @@ pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr, * @attr: struct bin_attribute for this file * @vma: struct vm_area_struct passed to mmap * - * Uses an arch specific callback, pci_mmap_legacy_page_range, to mmap + * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap * legacy memory space (first meg of bus space) into application virtual * memory space. */ -int +static int pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr, struct vm_area_struct *vma) { @@ -480,7 +480,90 @@ pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr, struct device, kobj)); - return pci_mmap_legacy_page_range(bus, vma); + return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); +} + +/** + * pci_mmap_legacy_io - map legacy PCI IO into user memory space + * @kobj: kobject corresponding to device to be mapped + * @attr: struct bin_attribute for this file + * @vma: struct vm_area_struct passed to mmap + * + * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap + * legacy IO space (first meg of bus space) into application virtual + * memory space. Returns -ENOSYS if the operation isn't supported + */ +static int +pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr, + struct vm_area_struct *vma) +{ + struct pci_bus *bus = to_pci_bus(container_of(kobj, + struct device, + kobj)); + + return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); +} + +/** + * pci_create_legacy_files - create legacy I/O port and memory files + * @b: bus to create files under + * + * Some platforms allow access to legacy I/O port and ISA memory space on + * a per-bus basis. This routine creates the files and ties them into + * their associated read, write and mmap files from pci-sysfs.c + * + * On error unwind, but don't propogate the error to the caller + * as it is ok to set up the PCI bus without these files. + */ +void pci_create_legacy_files(struct pci_bus *b) +{ + int error; + + b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, + GFP_ATOMIC); + if (!b->legacy_io) + goto kzalloc_err; + + b->legacy_io->attr.name = "legacy_io"; + b->legacy_io->size = 0xffff; + b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; + b->legacy_io->read = pci_read_legacy_io; + b->legacy_io->write = pci_write_legacy_io; + b->legacy_io->mmap = pci_mmap_legacy_io; + error = device_create_bin_file(&b->dev, b->legacy_io); + if (error) + goto legacy_io_err; + + /* Allocated above after the legacy_io struct */ + b->legacy_mem = b->legacy_io + 1; + b->legacy_mem->attr.name = "legacy_mem"; + b->legacy_mem->size = 1024*1024; + b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; + b->legacy_mem->mmap = pci_mmap_legacy_mem; + error = device_create_bin_file(&b->dev, b->legacy_mem); + if (error) + goto legacy_mem_err; + + return; + +legacy_mem_err: + device_remove_bin_file(&b->dev, b->legacy_io); +legacy_io_err: + kfree(b->legacy_io); + b->legacy_io = NULL; +kzalloc_err: + printk(KERN_WARNING "pci: warning: could not create legacy I/O port " + "and ISA memory resources to sysfs\n"); + return; +} + +void pci_remove_legacy_files(struct pci_bus *b) +{ + if (b->legacy_io) { + device_remove_bin_file(&b->dev, b->legacy_io); + device_remove_bin_file(&b->dev, b->legacy_mem); + kfree(b->legacy_io); /* both are allocated here */ + } } #endif /* HAVE_PCI_LEGACY */ diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 39684c1415c5..b205ab866a1d 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -82,7 +82,13 @@ static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; } /* Functions for PCI Hotplug drivers to use */ extern unsigned int pci_do_scan_bus(struct pci_bus *bus); +#ifdef HAVE_PCI_LEGACY +extern void pci_create_legacy_files(struct pci_bus *bus); extern void pci_remove_legacy_files(struct pci_bus *bus); +#else +static inline void pci_create_legacy_files(struct pci_bus *bus) { return; } +static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; } +#endif /* Lock for read/write access to pci device and bus lists */ extern struct rw_semaphore pci_bus_sem; diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index afb9f1c0bc28..aaaf0a1fed22 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -42,72 +42,6 @@ int no_pci_devices(void) } EXPORT_SYMBOL(no_pci_devices); -#ifdef HAVE_PCI_LEGACY -/** - * pci_create_legacy_files - create legacy I/O port and memory files - * @b: bus to create files under - * - * Some platforms allow access to legacy I/O port and ISA memory space on - * a per-bus basis. This routine creates the files and ties them into - * their associated read, write and mmap files from pci-sysfs.c - * - * On error unwind, but don't propogate the error to the caller - * as it is ok to set up the PCI bus without these files. - */ -static void pci_create_legacy_files(struct pci_bus *b) -{ - int error; - - b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2, - GFP_ATOMIC); - if (!b->legacy_io) - goto kzalloc_err; - - b->legacy_io->attr.name = "legacy_io"; - b->legacy_io->size = 0xffff; - b->legacy_io->attr.mode = S_IRUSR | S_IWUSR; - b->legacy_io->read = pci_read_legacy_io; - b->legacy_io->write = pci_write_legacy_io; - error = device_create_bin_file(&b->dev, b->legacy_io); - if (error) - goto legacy_io_err; - - /* Allocated above after the legacy_io struct */ - b->legacy_mem = b->legacy_io + 1; - b->legacy_mem->attr.name = "legacy_mem"; - b->legacy_mem->size = 1024*1024; - b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR; - b->legacy_mem->mmap = pci_mmap_legacy_mem; - error = device_create_bin_file(&b->dev, b->legacy_mem); - if (error) - goto legacy_mem_err; - - return; - -legacy_mem_err: - device_remove_bin_file(&b->dev, b->legacy_io); -legacy_io_err: - kfree(b->legacy_io); - b->legacy_io = NULL; -kzalloc_err: - printk(KERN_WARNING "pci: warning: could not create legacy I/O port " - "and ISA memory resources to sysfs\n"); - return; -} - -void pci_remove_legacy_files(struct pci_bus *b) -{ - if (b->legacy_io) { - device_remove_bin_file(&b->dev, b->legacy_io); - device_remove_bin_file(&b->dev, b->legacy_mem); - kfree(b->legacy_io); /* both are allocated here */ - } -} -#else /* !HAVE_PCI_LEGACY */ -static inline void pci_create_legacy_files(struct pci_bus *bus) { return; } -void pci_remove_legacy_files(struct pci_bus *bus) { return; } -#endif /* HAVE_PCI_LEGACY */ - /* * PCI Bus Class Devices */ -- cgit v1.2.3