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-rw-r--r--arch/x86/pci/init.c4
-rw-r--r--arch/x86/pci/mmconfig-shared.c149
-rw-r--r--arch/x86/pci/pci.h1
-rw-r--r--drivers/acpi/bus.c2
-rw-r--r--include/linux/pci.h8
5 files changed, 143 insertions, 21 deletions
diff --git a/arch/x86/pci/init.c b/arch/x86/pci/init.c
index 3de9f9ba2da6..2080b04b3bcc 100644
--- a/arch/x86/pci/init.c
+++ b/arch/x86/pci/init.c
@@ -11,9 +11,7 @@ static __init int pci_access_init(void)
#ifdef CONFIG_PCI_DIRECT
type = pci_direct_probe();
#endif
-#ifdef CONFIG_PCI_MMCONFIG
- pci_mmcfg_init(type);
-#endif
+ pci_mmcfg_early_init(type);
if (raw_pci_ops)
return 0;
#ifdef CONFIG_PCI_BIOS
diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 8d54df4dfaad..498e35ee428e 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -173,9 +173,78 @@ static void __init pci_mmcfg_insert_resources(unsigned long resource_flags)
pci_mmcfg_resources_inserted = 1;
}
-static void __init pci_mmcfg_reject_broken(int type)
+static acpi_status __init check_mcfg_resource(struct acpi_resource *res,
+ void *data)
+{
+ struct resource *mcfg_res = data;
+ struct acpi_resource_address64 address;
+ acpi_status status;
+
+ if (res->type == ACPI_RESOURCE_TYPE_FIXED_MEMORY32) {
+ struct acpi_resource_fixed_memory32 *fixmem32 =
+ &res->data.fixed_memory32;
+ if (!fixmem32)
+ return AE_OK;
+ if ((mcfg_res->start >= fixmem32->address) &&
+ (mcfg_res->end < (fixmem32->address +
+ fixmem32->address_length))) {
+ mcfg_res->flags = 1;
+ return AE_CTRL_TERMINATE;
+ }
+ }
+ if ((res->type != ACPI_RESOURCE_TYPE_ADDRESS32) &&
+ (res->type != ACPI_RESOURCE_TYPE_ADDRESS64))
+ return AE_OK;
+
+ status = acpi_resource_to_address64(res, &address);
+ if (ACPI_FAILURE(status) ||
+ (address.address_length <= 0) ||
+ (address.resource_type != ACPI_MEMORY_RANGE))
+ return AE_OK;
+
+ if ((mcfg_res->start >= address.minimum) &&
+ (mcfg_res->end < (address.minimum + address.address_length))) {
+ mcfg_res->flags = 1;
+ return AE_CTRL_TERMINATE;
+ }
+ return AE_OK;
+}
+
+static acpi_status __init find_mboard_resource(acpi_handle handle, u32 lvl,
+ void *context, void **rv)
+{
+ struct resource *mcfg_res = context;
+
+ acpi_walk_resources(handle, METHOD_NAME__CRS,
+ check_mcfg_resource, context);
+
+ if (mcfg_res->flags)
+ return AE_CTRL_TERMINATE;
+
+ return AE_OK;
+}
+
+static int __init is_acpi_reserved(unsigned long start, unsigned long end)
+{
+ struct resource mcfg_res;
+
+ mcfg_res.start = start;
+ mcfg_res.end = end;
+ mcfg_res.flags = 0;
+
+ acpi_get_devices("PNP0C01", find_mboard_resource, &mcfg_res, NULL);
+
+ if (!mcfg_res.flags)
+ acpi_get_devices("PNP0C02", find_mboard_resource, &mcfg_res,
+ NULL);
+
+ return mcfg_res.flags;
+}
+
+static void __init pci_mmcfg_reject_broken(void)
{
typeof(pci_mmcfg_config[0]) *cfg;
+ int i;
if ((pci_mmcfg_config_num == 0) ||
(pci_mmcfg_config == NULL) ||
@@ -196,17 +265,37 @@ static void __init pci_mmcfg_reject_broken(int type)
goto reject;
}
- /*
- * Only do this check when type 1 works. If it doesn't work
- * assume we run on a Mac and always use MCFG
- */
- if (type == 1 && !e820_all_mapped(cfg->address,
- cfg->address + MMCONFIG_APER_MIN,
- E820_RESERVED)) {
- printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %Lx is not"
- " E820-reserved\n", cfg->address);
- goto reject;
+ for (i = 0; i < pci_mmcfg_config_num; i++) {
+ u32 size = (cfg->end_bus_number + 1) << 20;
+ cfg = &pci_mmcfg_config[i];
+ printk(KERN_NOTICE "PCI: MCFG configuration %d: base %lu "
+ "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 (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);
+ } else {
+ 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. */
+ if ((pci_probe & PCI_PROBE_CONF1) &&
+ 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);
+ else
+ goto reject;
+ }
}
+
return;
reject:
@@ -216,20 +305,46 @@ reject:
pci_mmcfg_config_num = 0;
}
-void __init pci_mmcfg_init(int type)
+void __init pci_mmcfg_early_init(int type)
+{
+ if ((pci_probe & PCI_PROBE_MMCONF) == 0)
+ return;
+
+ /* If type 1 access is available, no need to enable MMCONFIG yet, we can
+ defer until later when the ACPI interpreter is available to better
+ validate things. */
+ if (type == 1)
+ return;
+
+ acpi_table_parse(ACPI_SIG_MCFG, acpi_parse_mcfg);
+
+ if ((pci_mmcfg_config_num == 0) ||
+ (pci_mmcfg_config == NULL) ||
+ (pci_mmcfg_config[0].address == 0))
+ return;
+
+ if (pci_mmcfg_arch_init())
+ pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
+}
+
+void __init pci_mmcfg_late_init(void)
{
int known_bridge = 0;
+ /* MMCONFIG disabled */
if ((pci_probe & PCI_PROBE_MMCONF) == 0)
return;
- if (type == 1 && pci_mmcfg_check_hostbridge())
- known_bridge = 1;
+ /* MMCONFIG already enabled */
+ if (!(pci_probe & PCI_PROBE_MASK & ~PCI_PROBE_MMCONF))
+ return;
- if (!known_bridge) {
+ if ((pci_probe & PCI_PROBE_CONF1) && pci_mmcfg_check_hostbridge())
+ known_bridge = 1;
+ else
acpi_table_parse(ACPI_SIG_MCFG, acpi_parse_mcfg);
- pci_mmcfg_reject_broken(type);
- }
+
+ pci_mmcfg_reject_broken();
if ((pci_mmcfg_config_num == 0) ||
(pci_mmcfg_config == NULL) ||
diff --git a/arch/x86/pci/pci.h b/arch/x86/pci/pci.h
index c4bddaeff619..28b9b72ce7c7 100644
--- a/arch/x86/pci/pci.h
+++ b/arch/x86/pci/pci.h
@@ -97,7 +97,6 @@ extern struct pci_raw_ops pci_direct_conf1;
extern int pci_direct_probe(void);
extern void pci_direct_init(int type);
extern void pci_pcbios_init(void);
-extern void pci_mmcfg_init(int type);
/* pci-mmconfig.c */
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 2d1955c11833..a6dbcf4d9ef5 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -35,6 +35,7 @@
#ifdef CONFIG_X86
#include <asm/mpspec.h>
#endif
+#include <linux/pci.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
@@ -784,6 +785,7 @@ static int __init acpi_init(void)
result = acpi_bus_init();
if (!result) {
+ pci_mmcfg_late_init();
if (!(pm_flags & PM_APM))
pm_flags |= PM_ACPI;
else {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 292491324b01..43a4f9cae67d 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1053,5 +1053,13 @@ extern unsigned long pci_cardbus_mem_size;
extern int pcibios_add_platform_entries(struct pci_dev *dev);
+#ifdef CONFIG_PCI_MMCONFIG
+extern void __init pci_mmcfg_early_init(int type);
+extern void __init pci_mmcfg_late_init(void);
+#else
+static inline void pci_mmcfg_early_init(int type) { }
+static inline void pci_mmcfg_late_init(void) { }
+#endif
+
#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 06:07:32 +0100