Merge with rsync://fileserver/linux

Update to 2.6.12-rc3

7 files changed, 88 insertions, 27 deletions

diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c
index 720975e1af50..70bcd53451f6 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;
@@ -164,6 +165,7 @@ static int __init pcibios_init(void)
         if ((pci_probe & PCI_BIOS_SORT) && !(pci_probe & PCI_NO_SORT))
                 pcibios_sort();
 #endif
+        pci_assign_unassigned_resources();
         return 0;
 }
 
@@ -188,6 +190,9 @@ 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/i386.c b/arch/i386/pci/i386.c
index c205ea7e233b..93a364c82150 100644
--- a/arch/i386/pci/i386.c
+++ b/arch/i386/pci/i386.c
@@ -106,11 +106,16 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
                 if ((dev = bus->self)) {
                         for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) {
                                 r = &dev->resource[idx];
-                                if (!r->start)
+                                if (!r->flags)
                                         continue;
                                 pr = pci_find_parent_resource(dev, r);
-                                if (!pr || request_resource(pr, r) < 0)
+                                if (!r->start || !pr || request_resource(pr, r) < 0) {
                                         printk(KERN_ERR "PCI: Cannot allocate resource region %d of bridge %s\n", idx, pci_name(dev));
+                                        /* Something is wrong with the region.
+                                           Invalidate the resource to prevent child
+                                           resource allocations in this range. */
+                                        r->flags = 0;
+                                }
                         }
                 }
                 pcibios_allocate_bus_resources(&bus->children);
@@ -227,7 +232,7 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
 
         pci_read_config_word(dev, PCI_COMMAND, &cmd);
         old_cmd = cmd;
-        for(idx=0; idx<6; idx++) {
+        for(idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
                 /* Only set up the requested stuff */
                 if (!(mask & (1<<idx)))
                         continue;
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 */