8 files changed, 130 insertions, 33 deletions

diff --git a/arch/i386/boot/tools/build.c b/arch/i386/boot/tools/build.c
index 4a17956512e1..6835f6d47c31 100644
--- a/arch/i386/boot/tools/build.c
+++ b/arch/i386/boot/tools/build.c
@@ -70,7 +70,8 @@ void usage(void)
 
 int main(int argc, char ** argv)
 {
-        unsigned int i, c, sz, setup_sectors;
+        unsigned int i, sz, setup_sectors;
+        int c;
         u32 sys_size;
         byte major_root, minor_root;
         struct stat sb;
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index 9f63ae0f404b..b7808a89d945 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -159,9 +159,15 @@ char *__acpi_map_table(unsigned long phys, unsigned long size)
 #endif
 
 #ifdef CONFIG_PCI_MMCONFIG
-static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
+/* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
+struct acpi_table_mcfg_config *pci_mmcfg_config;
+int pci_mmcfg_config_num;
+
+int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
 {
         struct acpi_table_mcfg *mcfg;
+        unsigned long i;
+        int config_size;
 
         if (!phys_addr || !size)
                 return -EINVAL;
@@ -172,18 +178,38 @@ static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
                 return -ENODEV;
         }
 
-        if (mcfg->base_reserved) {
-                printk(KERN_ERR PREFIX "MMCONFIG not in low 4GB of memory\n");
+        /* how many config structures do we have */
+        pci_mmcfg_config_num = 0;
+        i = size - sizeof(struct acpi_table_mcfg);
+        while (i >= sizeof(struct acpi_table_mcfg_config)) {
+                ++pci_mmcfg_config_num;
+                i -= sizeof(struct acpi_table_mcfg_config);
+        };
+        if (pci_mmcfg_config_num == 0) {
+                printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
                 return -ENODEV;
         }
 
-        pci_mmcfg_base_addr = mcfg->base_address;
+        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->config, config_size);
+        for (i = 0; i < pci_mmcfg_config_num; ++i) {
+                if (mcfg->config[i].base_reserved) {
+                        printk(KERN_ERR PREFIX
+                               "MMCONFIG not in low 4GB of memory\n");
+                        return -ENODEV;
+                }
+        }
 
         return 0;
 }
-#else
-#define acpi_parse_mcfg NULL
-#endif /* !CONFIG_PCI_MMCONFIG */
+#endif /* CONFIG_PCI_MMCONFIG */
 
 #ifdef CONFIG_X86_LOCAL_APIC
 static int __init
@@ -507,6 +533,22 @@ acpi_unmap_lsapic(int cpu)
 EXPORT_SYMBOL(acpi_unmap_lsapic);
 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
 
+int
+acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
+{
+        /* TBD */
+        return -EINVAL;
+}
+EXPORT_SYMBOL(acpi_register_ioapic);
+
+int
+acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
+{
+        /* TBD */
+        return -EINVAL;
+}
+EXPORT_SYMBOL(acpi_unregister_ioapic);
+
 static unsigned long __init
 acpi_scan_rsdp (
         unsigned long           start,
@@ -1123,7 +1165,6 @@ int __init acpi_boot_init(void)
         acpi_process_madt();
 
         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
-        acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
 
         return 0;
 }
diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c
index 720975e1af50..87325263cd4f 100644
--- a/arch/i386/pci/common.c
+++ b/arch/i386/pci/common.c
@@ -25,7 +25,8 @@ unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
 
 int pci_routeirq;
 int pcibios_last_bus = -1;
-struct pci_bus *pci_root_bus = NULL;
+unsigned long pirq_table_addr;
+struct pci_bus *pci_root_bus;
 struct pci_raw_ops *raw_pci_ops;
 
 static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
@@ -133,7 +134,7 @@ struct pci_bus * __devinit pcibios_scan_root(int busnum)
 
         printk("PCI: Probing PCI hardware (bus %02x)\n", busnum);
 
-        return pci_scan_bus(busnum, &pci_root_ops, NULL);
+        return pci_scan_bus_parented(NULL, busnum, &pci_root_ops, NULL);
 }
 
 extern u8 pci_cache_line_size;
@@ -188,6 +189,9 @@ char * __devinit  pcibios_setup(char *str)
         } else if (!strcmp(str, "biosirq")) {
                 pci_probe |= PCI_BIOS_IRQ_SCAN;
                 return NULL;
+        } else if (!strncmp(str, "pirqaddr=", 9)) {
+                pirq_table_addr = simple_strtoul(str+9, NULL, 0);
+                return NULL;
         }
 #endif
 #ifdef CONFIG_PCI_DIRECT
diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index 83458f81e661..78ca1ecbb907 100644
--- a/arch/i386/pci/irq.c
+++ b/arch/i386/pci/irq.c
@@ -58,6 +58,35 @@ struct irq_router_handler {
 int (*pcibios_enable_irq)(struct pci_dev *dev) = NULL;
 
 /*
+ *  Check passed address for the PCI IRQ Routing Table signature
+ *  and perform checksum verification.
+ */
+
+static inline struct irq_routing_table * pirq_check_routing_table(u8 *addr)
+{
+        struct irq_routing_table *rt;
+        int i;
+        u8 sum;
+
+        rt = (struct irq_routing_table *) addr;
+        if (rt->signature != PIRQ_SIGNATURE ||
+            rt->version != PIRQ_VERSION ||
+            rt->size % 16 ||
+            rt->size < sizeof(struct irq_routing_table))
+                return NULL;
+        sum = 0;
+        for (i=0; i < rt->size; i++)
+                sum += addr[i];
+        if (!sum) {
+                DBG("PCI: Interrupt Routing Table found at 0x%p\n", rt);
+                return rt;
+        }
+        return NULL;
+}
+
+
+
+/*
  *  Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table.
  */
 
@@ -65,23 +94,17 @@ static struct irq_routing_table * __init pirq_find_routing_table(void)
 {
         u8 *addr;
         struct irq_routing_table *rt;
-        int i;
-        u8 sum;
 
+        if (pirq_table_addr) {
+                rt = pirq_check_routing_table((u8 *) __va(pirq_table_addr));
+                if (rt)
+                        return rt;
+                printk(KERN_WARNING "PCI: PIRQ table NOT found at pirqaddr\n");
+        }
         for(addr = (u8 *) __va(0xf0000); addr < (u8 *) __va(0x100000); addr += 16) {
-                rt = (struct irq_routing_table *) addr;
-                if (rt->signature != PIRQ_SIGNATURE ||
-                    rt->version != PIRQ_VERSION ||
-                    rt->size % 16 ||
-                    rt->size < sizeof(struct irq_routing_table))
-                        continue;
-                sum = 0;
-                for(i=0; i<rt->size; i++)
-                        sum += addr[i];
-                if (!sum) {
-                        DBG("PCI: Interrupt Routing Table found at 0x%p\n", rt);
+                rt = pirq_check_routing_table(addr);
+                if (rt)
                         return rt;
-                }
         }
         return NULL;
 }
diff --git a/arch/i386/pci/legacy.c b/arch/i386/pci/legacy.c
index 1492e3753869..149a9588c256 100644
--- a/arch/i386/pci/legacy.c
+++ b/arch/i386/pci/legacy.c
@@ -45,6 +45,8 @@ static int __init pci_legacy_init(void)
 
         printk("PCI: Probing PCI hardware\n");
         pci_root_bus = pcibios_scan_root(0);
+        if (pci_root_bus)
+                pci_bus_add_devices(pci_root_bus);
 
         pcibios_fixup_peer_bridges();
 
diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c
index 021a50aa51f4..60f0e7a1162a 100644
--- a/arch/i386/pci/mmconfig.c
+++ b/arch/i386/pci/mmconfig.c
@@ -11,11 +11,9 @@
 
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/acpi.h>
 #include "pci.h"
 
-/* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
-u32 pci_mmcfg_base_addr;
-
 #define mmcfg_virt_addr ((void __iomem *) fix_to_virt(FIX_PCIE_MCFG))
 
 /* The base address of the last MMCONFIG device accessed */
@@ -24,10 +22,31 @@ static u32 mmcfg_last_accessed_device;
 /*
  * Functions for accessing PCI configuration space with MMCONFIG accesses
  */
+static u32 get_base_addr(unsigned int seg, int bus)
+{
+        int cfg_num = -1;
+        struct acpi_table_mcfg_config *cfg;
+
+        while (1) {
+                ++cfg_num;
+                if (cfg_num >= pci_mmcfg_config_num) {
+                        /* something bad is going on, no cfg table is found. */
+                        /* so we fall back to the old way we used to do this */
+                        /* and just rely on the first entry to be correct. */
+                        return pci_mmcfg_config[0].base_address;
+                }
+                cfg = &pci_mmcfg_config[cfg_num];
+                if (cfg->pci_segment_group_number != seg)
+                        continue;
+                if ((cfg->start_bus_number <= bus) &&
+                    (cfg->end_bus_number >= bus))
+                        return cfg->base_address;
+        }
+}
 
-static inline void pci_exp_set_dev_base(int bus, int devfn)
+static inline void pci_exp_set_dev_base(unsigned int seg, int bus, int devfn)
 {
-        u32 dev_base = pci_mmcfg_base_addr | (bus << 20) | (devfn << 12);
+        u32 dev_base = get_base_addr(seg, bus) | (bus << 20) | (devfn << 12);
         if (dev_base != mmcfg_last_accessed_device) {
                 mmcfg_last_accessed_device = dev_base;
                 set_fixmap_nocache(FIX_PCIE_MCFG, dev_base);
@@ -44,7 +63,7 @@ static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
 
         spin_lock_irqsave(&pci_config_lock, flags);
 
-        pci_exp_set_dev_base(bus, devfn);
+        pci_exp_set_dev_base(seg, bus, devfn);
 
         switch (len) {
         case 1:
@@ -73,7 +92,7 @@ static int pci_mmcfg_write(unsigned int seg, unsigned int bus,
 
         spin_lock_irqsave(&pci_config_lock, flags);
 
-        pci_exp_set_dev_base(bus, devfn);
+        pci_exp_set_dev_base(seg, bus, devfn);
 
         switch (len) {
         case 1:
@@ -101,7 +120,11 @@ static int __init pci_mmcfg_init(void)
 {
         if ((pci_probe & PCI_PROBE_MMCONF) == 0)
                 goto out;
-        if (!pci_mmcfg_base_addr)
+
+        acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
+        if ((pci_mmcfg_config_num == 0) ||
+            (pci_mmcfg_config == NULL) ||
+            (pci_mmcfg_config[0].base_address == 0))
                 goto out;
 
         /* Kludge for now. Don't use mmconfig on AMD systems because
diff --git a/arch/i386/pci/numa.c b/arch/i386/pci/numa.c
index 9e3695461899..adbe17a38f6f 100644
--- a/arch/i386/pci/numa.c
+++ b/arch/i386/pci/numa.c
@@ -115,6 +115,8 @@ static int __init pci_numa_init(void)
                 return 0;
 
         pci_root_bus = pcibios_scan_root(0);
+        if (pci_root_bus)
+                pci_bus_add_devices(pci_root_bus);
         if (num_online_nodes() > 1)
                 for_each_online_node(quad) {
                         if (quad == 0)
diff --git a/arch/i386/pci/pci.h b/arch/i386/pci/pci.h
index a8fc80ca69f3..a80f0f55ff51 100644
--- a/arch/i386/pci/pci.h
+++ b/arch/i386/pci/pci.h
@@ -27,6 +27,7 @@
 #define PCI_ASSIGN_ALL_BUSSES   0x4000
 
 extern unsigned int pci_probe;
+extern unsigned long pirq_table_addr;
 
 /* pci-i386.c */