diff options
| -rw-r--r-- | arch/ia64/pci/pci.c | 12 | ||||
| -rw-r--r-- | arch/x86/pci/acpi.c | 33 | ||||
| -rw-r--r-- | arch/x86/pci/bus_numa.c | 3 | ||||
| -rw-r--r-- | arch/x86/pci/bus_numa.h | 3 | ||||
| -rw-r--r-- | drivers/pci/bus.c | 46 | ||||
| -rw-r--r-- | drivers/pci/probe.c | 17 | ||||
| -rw-r--r-- | include/linux/pci.h | 35 |
7 files changed, 98 insertions, 51 deletions
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index 89f957c..64aff52 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -320,9 +320,9 @@ static __devinit acpi_status add_window(struct acpi_resource *res, void *data) static void __devinit pcibios_setup_root_windows(struct pci_bus *bus, struct pci_controller *ctrl) { - int i, j; + int i; - j = 0; + pci_bus_remove_resources(bus); for (i = 0; i < ctrl->windows; i++) { struct resource *res = &ctrl->window[i].resource; /* HP's firmware has a hack to work around a Windows bug. @@ -330,13 +330,7 @@ pcibios_setup_root_windows(struct pci_bus *bus, struct pci_controller *ctrl) if ((res->flags & IORESOURCE_MEM) && (res->end - res->start < 16)) continue; - if (j >= PCI_BUS_NUM_RESOURCES) { - dev_warn(&bus->dev, - "ignoring host bridge window %pR (no space)\n", - res); - continue; - } - bus->resource[j++] = res; + pci_bus_add_resource(bus, res, 0); } } diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index 959e548..a2f8cdb 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -45,20 +45,6 @@ count_resource(struct acpi_resource *acpi_res, void *data) return AE_OK; } -static int -bus_has_transparent_bridge(struct pci_bus *bus) -{ - struct pci_dev *dev; - - list_for_each_entry(dev, &bus->devices, bus_list) { - u16 class = dev->class >> 8; - - if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) - return true; - } - return false; -} - static void align_resource(struct acpi_device *bridge, struct resource *res) { @@ -92,12 +78,8 @@ setup_resource(struct acpi_resource *acpi_res, void *data) acpi_status status; unsigned long flags; struct resource *root; - int max_root_bus_resources = PCI_BUS_NUM_RESOURCES; u64 start, end; - if (bus_has_transparent_bridge(info->bus)) - max_root_bus_resources -= 3; - status = resource_to_addr(acpi_res, &addr); if (!ACPI_SUCCESS(status)) return AE_OK; @@ -115,15 +97,6 @@ setup_resource(struct acpi_resource *acpi_res, void *data) start = addr.minimum + addr.translation_offset; end = start + addr.address_length - 1; - if (info->res_num >= max_root_bus_resources) { - if (pci_probe & PCI_USE__CRS) - printk(KERN_WARNING "PCI: Failed to allocate " - "0x%lx-0x%lx from %s for %s due to _CRS " - "returning more than %d resource descriptors\n", - (unsigned long) start, (unsigned long) end, - root->name, info->name, max_root_bus_resources); - return AE_OK; - } res = &info->res[info->res_num]; res->name = info->name; @@ -143,7 +116,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data) dev_err(&info->bridge->dev, "can't allocate host bridge window %pR\n", res); } else { - info->bus->resource[info->res_num] = res; + pci_bus_add_resource(info->bus, res, 0); info->res_num++; if (addr.translation_offset) dev_info(&info->bridge->dev, "host bridge window %pR " @@ -164,7 +137,9 @@ get_current_resources(struct acpi_device *device, int busnum, struct pci_root_info info; size_t size; - if (!(pci_probe & PCI_USE__CRS)) + if (pci_probe & PCI_USE__CRS) + pci_bus_remove_resources(bus); + else dev_info(&device->dev, "ignoring host bridge windows from ACPI; " "boot with \"pci=use_crs\" to use them\n"); diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c index f939d60..12d54ff 100644 --- a/arch/x86/pci/bus_numa.c +++ b/arch/x86/pci/bus_numa.c @@ -36,13 +36,14 @@ void x86_pci_root_bus_res_quirks(struct pci_bus *b) printk(KERN_DEBUG "PCI: peer root bus %02x res updated from pci conf\n", b->number); + pci_bus_remove_resources(b); info = &pci_root_info[i]; for (j = 0; j < info->res_num; j++) { struct resource *res; struct resource *root; res = &info->res[j]; - b->resource[j] = res; + pci_bus_add_resource(b, res, 0); if (res->flags & IORESOURCE_IO) root = &ioport_resource; else diff --git a/arch/x86/pci/bus_numa.h b/arch/x86/pci/bus_numa.h index adbc23f..731b64e 100644 --- a/arch/x86/pci/bus_numa.h +++ b/arch/x86/pci/bus_numa.h @@ -2,8 +2,7 @@ /* * sub bus (transparent) will use entres from 3 to store extra from - * root, so need to make sure we have enough slot there, Should we - * increase PCI_BUS_NUM_RESOURCES? + * root, so need to make sure we have enough slot there. */ #define RES_NUM 16 struct pci_root_info { diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index e75d219..712250f 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -17,6 +17,52 @@ #include "pci.h" +void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, + unsigned int flags) +{ + struct pci_bus_resource *bus_res; + + bus_res = kzalloc(sizeof(struct pci_bus_resource), GFP_KERNEL); + if (!bus_res) { + dev_err(&bus->dev, "can't add %pR resource\n", res); + return; + } + + bus_res->res = res; + bus_res->flags = flags; + list_add_tail(&bus_res->list, &bus->resources); +} + +struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n) +{ + struct pci_bus_resource *bus_res; + + if (n < PCI_BRIDGE_RESOURCE_NUM) + return bus->resource[n]; + + n -= PCI_BRIDGE_RESOURCE_NUM; + list_for_each_entry(bus_res, &bus->resources, list) { + if (n-- == 0) + return bus_res->res; + } + return NULL; +} +EXPORT_SYMBOL_GPL(pci_bus_resource_n); + +void pci_bus_remove_resources(struct pci_bus *bus) +{ + struct pci_bus_resource *bus_res, *tmp; + int i; + + for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) + bus->resource[i] = 0; + + list_for_each_entry_safe(bus_res, tmp, &bus->resources, list) { + list_del(&bus_res->list); + kfree(bus_res); + } +} + /** * pci_bus_alloc_resource - allocate a resource from a parent bus * @bus: PCI bus diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 70c4ed2..270d069 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -89,6 +89,7 @@ static void release_pcibus_dev(struct device *dev) if (pci_bus->bridge) put_device(pci_bus->bridge); + pci_bus_remove_resources(pci_bus); kfree(pci_bus); } @@ -394,6 +395,7 @@ static void __devinit pci_read_bridge_mmio_pref(struct pci_bus *child) void __devinit pci_read_bridge_bases(struct pci_bus *child) { struct pci_dev *dev = child->self; + struct resource *res; int i; if (pci_is_root_bus(child)) /* It's a host bus, nothing to read */ @@ -403,17 +405,23 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child) child->secondary, child->subordinate, dev->transparent ? " (subtractive decode)" : ""); + pci_bus_remove_resources(child); + for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) + child->resource[i] = &dev->resource[PCI_BRIDGE_RESOURCES+i]; + pci_read_bridge_io(child); pci_read_bridge_mmio(child); pci_read_bridge_mmio_pref(child); if (dev->transparent) { - for (i = 3; i < PCI_BUS_NUM_RESOURCES; i++) { - child->resource[i] = child->parent->resource[i - 3]; - if (child->resource[i]) + pci_bus_for_each_resource(child->parent, res, i) { + if (res) { + pci_bus_add_resource(child, res, + PCI_SUBTRACTIVE_DECODE); dev_printk(KERN_DEBUG, &dev->dev, " bridge window %pR (subtractive decode)\n", - child->resource[i]); + res); + } } } } @@ -428,6 +436,7 @@ static struct pci_bus * pci_alloc_bus(void) INIT_LIST_HEAD(&b->children); INIT_LIST_HEAD(&b->devices); INIT_LIST_HEAD(&b->slots); + INIT_LIST_HEAD(&b->resources); b->max_bus_speed = PCI_SPEED_UNKNOWN; b->cur_bus_speed = PCI_SPEED_UNKNOWN; } diff --git a/include/linux/pci.h b/include/linux/pci.h index 2ff9d26..e19a696 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -364,9 +364,26 @@ static inline void pci_add_saved_cap(struct pci_dev *pci_dev, hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space); } -#ifndef PCI_BUS_NUM_RESOURCES -#define PCI_BUS_NUM_RESOURCES 16 -#endif +/* + * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond + * to P2P or CardBus bridge windows) go in a table. Additional ones (for + * buses below host bridges or subtractive decode bridges) go in the list. + * Use pci_bus_for_each_resource() to iterate through all the resources. + */ + +/* + * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly + * and there's no way to program the bridge with the details of the window. + * This does not apply to ACPI _CRS windows, even with the _DEC subtractive- + * decode bit set, because they are explicit and can be programmed with _SRS. + */ +#define PCI_SUBTRACTIVE_DECODE 0x1 + +struct pci_bus_resource { + struct list_head list; + struct resource *res; + unsigned int flags; +}; #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */ @@ -377,8 +394,8 @@ struct pci_bus { struct list_head devices; /* list of devices on this bus */ struct pci_dev *self; /* bridge device as seen by parent */ struct list_head slots; /* list of slots on this bus */ - struct resource *resource[PCI_BUS_NUM_RESOURCES]; - /* address space routed to this bus */ + struct resource *resource[PCI_BRIDGE_RESOURCE_NUM]; + struct list_head resources; /* address space routed to this bus */ struct pci_ops *ops; /* configuration access functions */ void *sysdata; /* hook for sys-specific extension */ @@ -829,8 +846,14 @@ int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *); void pci_release_selected_regions(struct pci_dev *, int); /* drivers/pci/bus.c */ +void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags); +struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n); +void pci_bus_remove_resources(struct pci_bus *bus); + #define pci_bus_for_each_resource(bus, res, i) \ - for (i = 0; res = bus->resource[i], i < PCI_BUS_NUM_RESOURCES; i++) + for (i = 0; \ + (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \ + i++) int __must_check pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, resource_size_t size, |