| #include <linux/pci.h> |
| #include <linux/acpi.h> |
| #include <linux/init.h> |
| #include <linux/irq.h> |
| #include <linux/dmi.h> |
| #include <linux/slab.h> |
| #include <asm/numa.h> |
| #include <asm/pci_x86.h> |
| |
| struct pci_root_info { |
| struct acpi_device *bridge; |
| char name[16]; |
| unsigned int res_num; |
| struct resource *res; |
| resource_size_t *res_offset; |
| struct pci_sysdata sd; |
| #ifdef CONFIG_PCI_MMCONFIG |
| bool mcfg_added; |
| u16 segment; |
| u8 start_bus; |
| u8 end_bus; |
| #endif |
| }; |
| |
| static bool pci_use_crs = true; |
| static bool pci_ignore_seg = false; |
| |
| 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 int __init set_ignore_seg(const struct dmi_system_id *id) |
| { |
| printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident); |
| pci_ignore_seg = true; |
| return 0; |
| } |
| |
| static const struct dmi_system_id pci_crs_quirks[] __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"), |
| }, |
| }, |
| /* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/931368 */ |
| /* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033299 */ |
| { |
| .callback = set_use_crs, |
| .ident = "Foxconn K8M890-8237A", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "Foxconn"), |
| DMI_MATCH(DMI_BOARD_NAME, "K8M890-8237A"), |
| 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 )"), |
| }, |
| }, |
| |
| /* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */ |
| { |
| .callback = set_ignore_seg, |
| .ident = "HP xw9300", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"), |
| }, |
| }, |
| {} |
| }; |
| |
| void __init pci_acpi_crs_quirks(void) |
| { |
| int year; |
| |
| if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) { |
| if (iomem_resource.end <= 0xffffffff) |
| pci_use_crs = false; |
| } |
| |
| dmi_check_system(pci_crs_quirks); |
| |
| /* |
| * 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"); |
| } |
| |
| #ifdef CONFIG_PCI_MMCONFIG |
| static int check_segment(u16 seg, struct device *dev, char *estr) |
| { |
| if (seg) { |
| dev_err(dev, |
| "%s can't access PCI configuration " |
| "space under this host bridge.\n", |
| estr); |
| return -EIO; |
| } |
| |
| /* |
| * Failure in adding MMCFG information is not fatal, |
| * just can't access extended configuration space of |
| * devices under this host bridge. |
| */ |
| dev_warn(dev, |
| "%s can't access extended PCI configuration " |
| "space under this bridge.\n", |
| estr); |
| |
| return 0; |
| } |
| |
| static int setup_mcfg_map(struct pci_root_info *info, u16 seg, u8 start, |
| u8 end, phys_addr_t addr) |
| { |
| int result; |
| struct device *dev = &info->bridge->dev; |
| |
| info->start_bus = start; |
| info->end_bus = end; |
| info->mcfg_added = false; |
| |
| /* return success if MMCFG is not in use */ |
| if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg) |
| return 0; |
| |
| if (!(pci_probe & PCI_PROBE_MMCONF)) |
| return check_segment(seg, dev, "MMCONFIG is disabled,"); |
| |
| result = pci_mmconfig_insert(dev, seg, start, end, addr); |
| if (result == 0) { |
| /* enable MMCFG if it hasn't been enabled yet */ |
| if (raw_pci_ext_ops == NULL) |
| raw_pci_ext_ops = &pci_mmcfg; |
| info->mcfg_added = true; |
| } else if (result != -EEXIST) |
| return check_segment(seg, dev, |
| "fail to add MMCONFIG information,"); |
| |
| return 0; |
| } |
| |
| static void teardown_mcfg_map(struct pci_root_info *info) |
| { |
| if (info->mcfg_added) { |
| pci_mmconfig_delete(info->segment, info->start_bus, |
| info->end_bus); |
| info->mcfg_added = false; |
| } |
| } |
| #else |
| static int setup_mcfg_map(struct pci_root_info *info, |
| u16 seg, u8 start, u8 end, |
| phys_addr_t addr) |
| { |
| return 0; |
| } |
| static void teardown_mcfg_map(struct pci_root_info *info) |
| { |
| } |
| #endif |
| |
| 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; |
| info->res_offset[info->res_num] = addr.translation_offset; |
| info->res_num++; |
| |
| if (!pci_use_crs) |
| dev_printk(KERN_DEBUG, &info->bridge->dev, |
| "host bridge window %pR (ignored)\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)) { |
| res2->start = min(res1->start, res2->start); |
| res2->end = max(res1->end, res2->end); |
| dev_info(&info->bridge->dev, |
| "host bridge window expanded to %pR; %pR ignored\n", |
| res2, res1); |
| res1->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_offset(resources, res, |
| info->res_offset[i]); |
| } |
| } |
| |
| static void free_pci_root_info_res(struct pci_root_info *info) |
| { |
| kfree(info->res); |
| info->res = NULL; |
| kfree(info->res_offset); |
| info->res_offset = 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); |
| |
| teardown_mcfg_map(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 = kzalloc(size, GFP_KERNEL); |
| if (!info->res) { |
| info->res_num = 0; |
| return; |
| } |
| |
| size = sizeof(*info->res_offset) * info->res_num; |
| info->res_num = 0; |
| info->res_offset = kzalloc(size, GFP_KERNEL); |
| if (!info->res_offset) { |
| kfree(info->res); |
| info->res = NULL; |
| return; |
| } |
| |
| acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, |
| info); |
| } |
| |
| struct pci_bus *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 = NULL; |
| struct pci_sysdata *sd; |
| int node; |
| #ifdef CONFIG_ACPI_NUMA |
| int pxm; |
| #endif |
| |
| if (pci_ignore_seg) |
| domain = 0; |
| |
| 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; |
| sd->companion = device; |
| /* |
| * 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); |
| } |
| |
| if (!setup_mcfg_map(info, domain, (u8)root->secondary.start, |
| (u8)root->secondary.end, root->mcfg_addr)) |
| 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) |
| pcie_bus_configure_settings(child); |
| } |
| |
| 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 pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) |
| { |
| struct pci_sysdata *sd = bridge->bus->sysdata; |
| |
| ACPI_COMPANION_SET(&bridge->dev, sd->companion); |
| return 0; |
| } |
| |
| 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; |
| } |