Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...

[linux-2.6-omap-h63xx.git] / arch / x86 / pci / mmconfig-shared.c

diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 2bd5c53f638603932f9e195a8e70d1b496588d72..654a2234f8f3ba8adbcba6e644c7b7d4935488bc 100644 (file)
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -209,7 +209,7 @@ static int __init pci_mmcfg_check_hostbridge(void)
        return name != NULL;
 }
 
-static void __init pci_mmcfg_insert_resources(unsigned long resource_flags)
+static void __init pci_mmcfg_insert_resources(void)
 {
 #define PCI_MMCFG_RESOURCE_NAME_LEN 19
        int i;
@@ -233,7 +233,7 @@ static void __init pci_mmcfg_insert_resources(unsigned long resource_flags)
                         cfg->pci_segment);
                res->start = cfg->address;
                res->end = res->start + (num_buses << 20) - 1;
-               res->flags = IORESOURCE_MEM | resource_flags;
+               res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
                insert_resource(&iomem_resource, res);
                names += PCI_MMCFG_RESOURCE_NAME_LEN;
        }
@@ -293,7 +293,7 @@ static acpi_status __init find_mboard_resource(acpi_handle handle, u32 lvl,
        return AE_OK;
 }
 
-static int __init is_acpi_reserved(unsigned long start, unsigned long end)
+static int __init is_acpi_reserved(u64 start, u64 end, unsigned not_used)
 {
        struct resource mcfg_res;
 
@@ -310,6 +310,41 @@ static int __init is_acpi_reserved(unsigned long start, unsigned long end)
        return mcfg_res.flags;
 }
 
+typedef int (*check_reserved_t)(u64 start, u64 end, unsigned type);
+
+static int __init is_mmconf_reserved(check_reserved_t is_reserved,
+               u64 addr, u64 size, int i,
+               typeof(pci_mmcfg_config[0]) *cfg, int with_e820)
+{
+       u64 old_size = size;
+       int valid = 0;
+
+       while (!is_reserved(addr, addr + size - 1, E820_RESERVED)) {
+               size >>= 1;
+               if (size < (16UL<<20))
+                       break;
+       }
+
+       if (size >= (16UL<<20) || size == old_size) {
+               printk(KERN_NOTICE
+                      "PCI: MCFG area at %Lx reserved in %s\n",
+                       addr, with_e820?"E820":"ACPI motherboard resources");
+               valid = 1;
+
+               if (old_size != size) {
+                       /* update end_bus_number */
+                       cfg->end_bus_number = cfg->start_bus_number + ((size>>20) - 1);
+                       printk(KERN_NOTICE "PCI: updated MCFG configuration %d: base %lx "
+                              "segment %hu buses %u - %u\n",
+                              i, (unsigned long)cfg->address, cfg->pci_segment,
+                              (unsigned int)cfg->start_bus_number,
+                              (unsigned int)cfg->end_bus_number);
+               }
+       }
+
+       return valid;
+}
+
 static void __init pci_mmcfg_reject_broken(int early)
 {
        typeof(pci_mmcfg_config[0]) *cfg;
@@ -324,21 +359,22 @@ static void __init pci_mmcfg_reject_broken(int early)
 
        for (i = 0; i < pci_mmcfg_config_num; i++) {
                int valid = 0;
-               u32 size = (cfg->end_bus_number + 1) << 20;
+               u64 addr, size;
+
                cfg = &pci_mmcfg_config[i];
+               addr = cfg->start_bus_number;
+               addr <<= 20;
+               addr += cfg->address;
+               size = cfg->end_bus_number + 1 - cfg->start_bus_number;
+               size <<= 20;
                printk(KERN_NOTICE "PCI: MCFG configuration %d: base %lx "
                       "segment %hu buses %u - %u\n",
                       i, (unsigned long)cfg->address, cfg->pci_segment,
                       (unsigned int)cfg->start_bus_number,
                       (unsigned int)cfg->end_bus_number);
 
-               if (!early &&
-                   is_acpi_reserved(cfg->address, cfg->address + size - 1)) {
-                       printk(KERN_NOTICE "PCI: MCFG area at %Lx reserved "
-                              "in ACPI motherboard resources\n",
-                              cfg->address);
-                       valid = 1;
-               }
+               if (!early)
+                       valid = is_mmconf_reserved(is_acpi_reserved, addr, size, i, cfg, 0);
 
                if (valid)
                        continue;
@@ -347,16 +383,11 @@ static void __init pci_mmcfg_reject_broken(int early)
                        printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %Lx is not"
                               " reserved in ACPI motherboard resources\n",
                               cfg->address);
+
                /* Don't try to do this check unless configuration
                   type 1 is available. how about type 2 ?*/
-               if (raw_pci_ops && e820_all_mapped(cfg->address,
-                                                 cfg->address + size - 1,
-                                                 E820_RESERVED)) {
-                       printk(KERN_NOTICE
-                              "PCI: MCFG area at %Lx reserved in E820\n",
-                              cfg->address);
-                       valid = 1;
-               }
+               if (raw_pci_ops)
+                       valid = is_mmconf_reserved(e820_all_mapped, addr, size, i, cfg, 1);
 
                if (!valid)
                        goto reject;
@@ -403,11 +434,9 @@ static void __init __pci_mmcfg_init(int early)
            (pci_mmcfg_config[0].address == 0))
                return;
 
-       if (pci_mmcfg_arch_init()) {
-               if (known_bridge)
-                       pci_mmcfg_insert_resources(IORESOURCE_BUSY);
+       if (pci_mmcfg_arch_init())
                pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
-       } else {
+       else {
                /*
                 * Signal not to attempt to insert mmcfg resources because
                 * the architecture mmcfg setup could not initialize.
@@ -444,7 +473,7 @@ static int __init pci_mmcfg_late_insert_resources(void)
         * marked so it won't cause request errors when __request_region is
         * called.
         */
-       pci_mmcfg_insert_resources(0);
+       pci_mmcfg_insert_resources();
 
        return 0;
 }