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-rw-r--r--arch/x86/pci/acpi.c33
-rw-r--r--arch/x86/pci/i386.c17
-rw-r--r--arch/x86/pci/mmconfig-shared.c65
3 files changed, 98 insertions, 17 deletions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index c0ecf250fe5..b26626dc517 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -38,15 +38,26 @@ count_resource(struct acpi_resource *acpi_res, void *data)
struct acpi_resource_address64 addr;
acpi_status status;
- if (info->res_num >= PCI_BUS_NUM_RESOURCES)
- return AE_OK;
-
status = resource_to_addr(acpi_res, &addr);
if (ACPI_SUCCESS(status))
info->res_num++;
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 acpi_status
setup_resource(struct acpi_resource *acpi_res, void *data)
{
@@ -56,9 +67,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
acpi_status status;
unsigned long flags;
struct resource *root;
-
- if (info->res_num >= PCI_BUS_NUM_RESOURCES)
- return AE_OK;
+ int max_root_bus_resources = PCI_BUS_NUM_RESOURCES;
status = resource_to_addr(acpi_res, &addr);
if (!ACPI_SUCCESS(status))
@@ -82,6 +91,18 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
res->end = res->start + addr.address_length - 1;
res->child = NULL;
+ if (bus_has_transparent_bridge(info->bus))
+ max_root_bus_resources -= 3;
+ if (info->res_num >= max_root_bus_resources) {
+ 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) res->start,
+ (unsigned long) res->end, root->name, info->name,
+ max_root_bus_resources);
+ info->res_num++;
+ return AE_OK;
+ }
+
if (insert_resource(root, res)) {
printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx "
"from %s for %s\n", (unsigned long) res->start,
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index a85bef20a3b..0fb56db16d1 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -116,7 +116,7 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
struct pci_bus *bus;
struct pci_dev *dev;
int idx;
- struct resource *r, *pr;
+ struct resource *r;
/* Depth-First Search on bus tree */
list_for_each_entry(bus, bus_list, node) {
@@ -126,9 +126,8 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
r = &dev->resource[idx];
if (!r->flags)
continue;
- pr = pci_find_parent_resource(dev, r);
- if (!r->start || !pr ||
- request_resource(pr, r) < 0) {
+ if (!r->start ||
+ pci_claim_resource(dev, idx) < 0) {
dev_info(&dev->dev, "BAR %d: can't allocate resource\n", idx);
/*
* Something is wrong with the region.
@@ -149,7 +148,7 @@ static void __init pcibios_allocate_resources(int pass)
struct pci_dev *dev = NULL;
int idx, disabled;
u16 command;
- struct resource *r, *pr;
+ struct resource *r;
for_each_pci_dev(dev) {
pci_read_config_word(dev, PCI_COMMAND, &command);
@@ -168,8 +167,7 @@ static void __init pcibios_allocate_resources(int pass)
(unsigned long long) r->start,
(unsigned long long) r->end,
r->flags, disabled, pass);
- pr = pci_find_parent_resource(dev, r);
- if (!pr || request_resource(pr, r) < 0) {
+ if (pci_claim_resource(dev, idx) < 0) {
dev_info(&dev->dev, "BAR %d: can't allocate resource\n", idx);
/* We'll assign a new address later */
r->end -= r->start;
@@ -197,7 +195,7 @@ static void __init pcibios_allocate_resources(int pass)
static int __init pcibios_assign_resources(void)
{
struct pci_dev *dev = NULL;
- struct resource *r, *pr;
+ struct resource *r;
if (!(pci_probe & PCI_ASSIGN_ROMS)) {
/*
@@ -209,8 +207,7 @@ static int __init pcibios_assign_resources(void)
r = &dev->resource[PCI_ROM_RESOURCE];
if (!r->flags || !r->start)
continue;
- pr = pci_find_parent_resource(dev, r);
- if (!pr || request_resource(pr, r) < 0) {
+ if (pci_claim_resource(dev, PCI_ROM_RESOURCE) < 0) {
r->end -= r->start;
r->start = 0;
}
diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 8766b0e216c..712443ec6d4 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -523,6 +523,69 @@ reject:
static int __initdata known_bridge;
+static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
+
+/* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
+struct acpi_mcfg_allocation *pci_mmcfg_config;
+int pci_mmcfg_config_num;
+
+static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
+{
+ if (!strcmp(mcfg->header.oem_id, "SGI"))
+ acpi_mcfg_64bit_base_addr = TRUE;
+
+ return 0;
+}
+
+static int __init pci_parse_mcfg(struct acpi_table_header *header)
+{
+ struct acpi_table_mcfg *mcfg;
+ unsigned long i;
+ int config_size;
+
+ if (!header)
+ return -EINVAL;
+
+ mcfg = (struct acpi_table_mcfg *)header;
+
+ /* how many config structures do we have */
+ pci_mmcfg_config_num = 0;
+ i = header->length - sizeof(struct acpi_table_mcfg);
+ while (i >= sizeof(struct acpi_mcfg_allocation)) {
+ ++pci_mmcfg_config_num;
+ i -= sizeof(struct acpi_mcfg_allocation);
+ };
+ if (pci_mmcfg_config_num == 0) {
+ printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
+ return -ENODEV;
+ }
+
+ config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
+ pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
+ if (!pci_mmcfg_config) {
+ printk(KERN_WARNING PREFIX
+ "No memory for MCFG config tables\n");
+ return -ENOMEM;
+ }
+
+ memcpy(pci_mmcfg_config, &mcfg[1], config_size);
+
+ acpi_mcfg_oem_check(mcfg);
+
+ for (i = 0; i < pci_mmcfg_config_num; ++i) {
+ if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
+ !acpi_mcfg_64bit_base_addr) {
+ printk(KERN_ERR PREFIX
+ "MMCONFIG not in low 4GB of memory\n");
+ kfree(pci_mmcfg_config);
+ pci_mmcfg_config_num = 0;
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
static void __init __pci_mmcfg_init(int early)
{
/* MMCONFIG disabled */
@@ -543,7 +606,7 @@ static void __init __pci_mmcfg_init(int early)
}
if (!known_bridge)
- acpi_table_parse(ACPI_SIG_MCFG, acpi_parse_mcfg);
+ acpi_table_parse(ACPI_SIG_MCFG, pci_parse_mcfg);
pci_mmcfg_reject_broken(early);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-23 02:52:32 +0000