#include #include #include #include #include #include #include #include struct pci_root_info { struct acpi_device *bridge; char name[16]; unsigned int res_num; struct resource *res; struct pci_sysdata sd; }; static bool pci_use_crs = true; static int __init set_use_crs(const struct dmi_system_id *id) { pci_use_crs = true; return 0; } static int __init set_nouse_crs(const struct dmi_system_id *id) { pci_use_crs = false; return 0; } static const struct dmi_system_id pci_use_crs_table[] __initconst = { /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */ { .callback = set_use_crs, .ident = "IBM System x3800", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "IBM"), DMI_MATCH(DMI_PRODUCT_NAME, "x3800"), }, }, /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */ /* 2006 AMD HT/VIA system with two host bridges */ { .callback = set_use_crs, .ident = "ASRock ALiveSATA2-GLAN", .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"), }, }, /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */ /* 2006 AMD HT/VIA system with two host bridges */ { .callback = set_use_crs, .ident = "ASUS M2V-MX SE", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"), DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), }, }, /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */ { .callback = set_use_crs, .ident = "MSI MS-7253", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"), DMI_MATCH(DMI_BOARD_NAME, "MS-7253"), DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"), }, }, /* Now for the blacklist.. */ /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */ { .callback = set_nouse_crs, .ident = "Dell Studio 1557", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"), DMI_MATCH(DMI_BIOS_VERSION, "A09"), }, }, /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */ { .callback = set_nouse_crs, .ident = "Thinkpad SL510", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), DMI_MATCH(DMI_BOARD_NAME, "2847DFG"), DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"), }, }, {} }; void __init pci_acpi_crs_quirks(void) { int year; if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) pci_use_crs = false; dmi_check_system(pci_use_crs_table); /* * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that * takes precedence over anything we figured out above. */ if (pci_probe & PCI_ROOT_NO_CRS) pci_use_crs = false; else if (pci_probe & PCI_USE__CRS) pci_use_crs = true; printk(KERN_INFO "PCI: %s host bridge windows from ACPI; " "if necessary, use \"pci=%s\" and report a bug\n", pci_use_crs ? "Using" : "Ignoring", pci_use_crs ? "nocrs" : "use_crs"); } static acpi_status resource_to_addr(struct acpi_resource *resource, struct acpi_resource_address64 *addr) { acpi_status status; struct acpi_resource_memory24 *memory24; struct acpi_resource_memory32 *memory32; struct acpi_resource_fixed_memory32 *fixed_memory32; memset(addr, 0, sizeof(*addr)); switch (resource->type) { case ACPI_RESOURCE_TYPE_MEMORY24: memory24 = &resource->data.memory24; addr->resource_type = ACPI_MEMORY_RANGE; addr->minimum = memory24->minimum; addr->address_length = memory24->address_length; addr->maximum = addr->minimum + addr->address_length - 1; return AE_OK; case ACPI_RESOURCE_TYPE_MEMORY32: memory32 = &resource->data.memory32; addr->resource_type = ACPI_MEMORY_RANGE; addr->minimum = memory32->minimum; addr->address_length = memory32->address_length; addr->maximum = addr->minimum + addr->address_length - 1; return AE_OK; case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: fixed_memory32 = &resource->data.fixed_memory32; addr->resource_type = ACPI_MEMORY_RANGE; addr->minimum = fixed_memory32->address; addr->address_length = fixed_memory32->address_length; addr->maximum = addr->minimum + addr->address_length - 1; return AE_OK; case ACPI_RESOURCE_TYPE_ADDRESS16: case ACPI_RESOURCE_TYPE_ADDRESS32: case ACPI_RESOURCE_TYPE_ADDRESS64: status = acpi_resource_to_address64(resource, addr); if (ACPI_SUCCESS(status) && (addr->resource_type == ACPI_MEMORY_RANGE || addr->resource_type == ACPI_IO_RANGE) && addr->address_length > 0) { return AE_OK; } break; } return AE_ERROR; } static acpi_status count_resource(struct acpi_resource *acpi_res, void *data) { struct pci_root_info *info = data; struct acpi_resource_address64 addr; acpi_status status; status = resource_to_addr(acpi_res, &addr); if (ACPI_SUCCESS(status)) info->res_num++; return AE_OK; } static acpi_status setup_resource(struct acpi_resource *acpi_res, void *data) { struct pci_root_info *info = data; struct resource *res; struct acpi_resource_address64 addr; acpi_status status; unsigned long flags; u64 start, orig_end, end; status = resource_to_addr(acpi_res, &addr); if (!ACPI_SUCCESS(status)) return AE_OK; if (addr.resource_type == ACPI_MEMORY_RANGE) { flags = IORESOURCE_MEM; if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY) flags |= IORESOURCE_PREFETCH; } else if (addr.resource_type == ACPI_IO_RANGE) { flags = IORESOURCE_IO; } else return AE_OK; start = addr.minimum + addr.translation_offset; orig_end = end = addr.maximum + addr.translation_offset; /* Exclude non-addressable range or non-addressable portion of range */ end = min(end, (u64)iomem_resource.end); if (end <= start) { dev_info(&info->bridge->dev, "host bridge window [%#llx-%#llx] " "(ignored, not CPU addressable)\n", start, orig_end); return AE_OK; } else if (orig_end != end) { dev_info(&info->bridge->dev, "host bridge window [%#llx-%#llx] " "([%#llx-%#llx] ignored, not CPU addressable)\n", start, orig_end, end + 1, orig_end); } res = &info->res[info->res_num]; res->name = info->name; res->flags = flags; res->start = start; res->end = end; res->child = NULL; if (!pci_use_crs) { dev_printk(KERN_DEBUG, &info->bridge->dev, "host bridge window %pR (ignored)\n", res); return AE_OK; } info->res_num++; if (addr.translation_offset) dev_info(&info->bridge->dev, "host bridge window %pR " "(PCI address [%#llx-%#llx])\n", res, res->start - addr.translation_offset, res->end - addr.translation_offset); else dev_info(&info->bridge->dev, "host bridge window %pR\n", res); return AE_OK; } static void coalesce_windows(struct pci_root_info *info, unsigned long type) { int i, j; struct resource *res1, *res2; for (i = 0; i < info->res_num; i++) { res1 = &info->res[i]; if (!(res1->flags & type)) continue; for (j = i + 1; j < info->res_num; j++) { res2 = &info->res[j]; if (!(res2->flags & type)) continue; /* * I don't like throwing away windows because then * our resources no longer match the ACPI _CRS, but * the kernel resource tree doesn't allow overlaps. */ if (resource_overlaps(res1, res2)) { res1->start = min(res1->start, res2->start); res1->end = max(res1->end, res2->end); dev_info(&info->bridge->dev, "host bridge window expanded to %pR; %pR ignored\n", res1, res2); res2->flags = 0; } } } } static void add_resources(struct pci_root_info *info, struct list_head *resources) { int i; struct resource *res, *root, *conflict; coalesce_windows(info, IORESOURCE_MEM); coalesce_windows(info, IORESOURCE_IO); for (i = 0; i < info->res_num; i++) { res = &info->res[i]; if (res->flags & IORESOURCE_MEM) root = &iomem_resource; else if (res->flags & IORESOURCE_IO) root = &ioport_resource; else continue; conflict = insert_resource_conflict(root, res); if (conflict) dev_info(&info->bridge->dev, "ignoring host bridge window %pR (conflicts with %s %pR)\n", res, conflict->name, conflict); else pci_add_resource(resources, res); } } static void free_pci_root_info_res(struct pci_root_info *info) { kfree(info->res); info->res = NULL; info->res_num = 0; } static void __release_pci_root_info(struct pci_root_info *info) { int i; struct resource *res; for (i = 0; i < info->res_num; i++) { res = &info->res[i]; if (!res->parent) continue; if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO))) continue; release_resource(res); } free_pci_root_info_res(info); kfree(info); } static void release_pci_root_info(struct pci_host_bridge *bridge) { struct pci_root_info *info = bridge->release_data; __release_pci_root_info(info); } static void probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device, int busnum, int domain) { size_t size; sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum); info->bridge = device; info->res_num = 0; acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource, info); if (!info->res_num) return; size = sizeof(*info->res) * info->res_num; info->res_num = 0; info->res = kmalloc(size, GFP_KERNEL); if (!info->res) return; acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, info); } struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) { struct acpi_device *device = root->device; struct pci_root_info *info = NULL; int domain = root->segment; int busnum = root->secondary.start; LIST_HEAD(resources); struct pci_bus *bus; struct pci_sysdata *sd; int node; #ifdef CONFIG_ACPI_NUMA int pxm; #endif if (domain && !pci_domains_supported) { printk(KERN_WARNING "pci_bus %04x:%02x: " "ignored (multiple domains not supported)\n", domain, busnum); return NULL; } node = -1; #ifdef CONFIG_ACPI_NUMA pxm = acpi_get_pxm(device->handle); if (pxm >= 0) node = pxm_to_node(pxm); if (node != -1) set_mp_bus_to_node(busnum, node); else #endif node = get_mp_bus_to_node(busnum); if (node != -1 && !node_online(node)) node = -1; info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) { printk(KERN_WARNING "pci_bus %04x:%02x: " "ignored (out of memory)\n", domain, busnum); return NULL; } sd = &info->sd; sd->domain = domain; sd->node = node; /* * Maybe the desired pci bus has been already scanned. In such case * it is unnecessary to scan the pci bus with the given domain,busnum. */ bus = pci_find_bus(domain, busnum); if (bus) { /* * If the desired bus exits, the content of bus->sysdata will * be replaced by sd. */ memcpy(bus->sysdata, sd, sizeof(*sd)); kfree(info); } else { probe_pci_root_info(info, device, busnum, domain); /* insert busn res at first */ pci_add_resource(&resources, &root->secondary); /* * _CRS with no apertures is normal, so only fall back to * defaults or native bridge info if we're ignoring _CRS. */ if (pci_use_crs) add_resources(info, &resources); else { free_pci_root_info_res(info); x86_pci_root_bus_resources(busnum, &resources); } bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd, &resources); if (bus) { pci_scan_child_bus(bus); pci_set_host_bridge_release( to_pci_host_bridge(bus->bridge), release_pci_root_info, info); } else { pci_free_resource_list(&resources); __release_pci_root_info(info); } } /* After the PCI-E bus has been walked and all devices discovered, * configure any settings of the fabric that might be necessary. */ if (bus) { struct pci_bus *child; list_for_each_entry(child, &bus->children, node) { struct pci_dev *self = child->self; if (!self) continue; pcie_bus_configure_settings(child, self->pcie_mpss); } } if (bus && node != -1) { #ifdef CONFIG_ACPI_NUMA if (pxm >= 0) dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d (pxm %d)\n", node, pxm); #else dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node); #endif } return bus; } int __init pci_acpi_init(void) { struct pci_dev *dev = NULL; if (acpi_noirq) return -ENODEV; printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n"); acpi_irq_penalty_init(); pcibios_enable_irq = acpi_pci_irq_enable; pcibios_disable_irq = acpi_pci_irq_disable; x86_init.pci.init_irq = x86_init_noop; if (pci_routeirq) { /* * PCI IRQ routing is set up by pci_enable_device(), but we * also do it here in case there are still broken drivers that * don't use pci_enable_device(). */ printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n"); for_each_pci_dev(dev) acpi_pci_irq_enable(dev); } return 0; }