diff options
Diffstat (limited to 'arch/x86/pci/acpi.c')
| -rw-r--r-- | arch/x86/pci/acpi.c | 109 |
1 files changed, 95 insertions, 14 deletions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index fc09c2754e0..505acdd6d60 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -12,8 +12,13 @@ struct pci_root_info { char name[16]; unsigned int res_num; struct resource *res; - int busnum; 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; @@ -120,6 +125,81 @@ void __init pci_acpi_crs_quirks(void) pci_use_crs ? "nocrs" : "use_crs"); } +#ifdef CONFIG_PCI_MMCONFIG +static int __devinit 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 __devinit 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 __devinit 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) @@ -234,13 +314,6 @@ setup_resource(struct acpi_resource *acpi_res, void *data) } 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; } @@ -332,8 +405,11 @@ static void __release_pci_root_info(struct pci_root_info *info) 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; @@ -347,7 +423,9 @@ probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device, { 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); @@ -360,8 +438,6 @@ probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device, if (!info->res) return; - sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum); - acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, info); } @@ -373,7 +449,7 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) int domain = root->segment; int busnum = root->secondary.start; LIST_HEAD(resources); - struct pci_bus *bus; + struct pci_bus *bus = NULL; struct pci_sysdata *sd; int node; #ifdef CONFIG_ACPI_NUMA @@ -426,6 +502,8 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) } 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. @@ -437,10 +515,13 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) x86_pci_root_bus_resources(busnum, &resources); } - bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd, - &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) { - bus->subordinate = pci_scan_child_bus(bus); + pci_scan_child_bus(bus); pci_set_host_bridge_release( to_pci_host_bridge(bus->bridge), release_pci_root_info, info); |