Merge branch 'pci-next+probe_only+bus2res-fb127cb' of git://github.com/bjorn-helgaas/linux into linux-next

3 files changed, 188 insertions, 53 deletions

diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 398f5d859791..4ce5ef2f2826 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -18,28 +18,36 @@
 
 #include "pci.h"
 
-void pci_add_resource(struct list_head *resources, struct resource *res)
+void pci_add_resource_offset(struct list_head *resources, struct resource *res,
+                             resource_size_t offset)
 {
-        struct pci_bus_resource *bus_res;
+        struct pci_host_bridge_window *window;
 
-        bus_res = kzalloc(sizeof(struct pci_bus_resource), GFP_KERNEL);
-        if (!bus_res) {
-                printk(KERN_ERR "PCI: can't add bus resource %pR\n", res);
+        window = kzalloc(sizeof(struct pci_host_bridge_window), GFP_KERNEL);
+        if (!window) {
+                printk(KERN_ERR "PCI: can't add host bridge window %pR\n", res);
                 return;
         }
 
-        bus_res->res = res;
-        list_add_tail(&bus_res->list, resources);
+        window->res = res;
+        window->offset = offset;
+        list_add_tail(&window->list, resources);
+}
+EXPORT_SYMBOL(pci_add_resource_offset);
+
+void pci_add_resource(struct list_head *resources, struct resource *res)
+{
+        pci_add_resource_offset(resources, res, 0);
 }
 EXPORT_SYMBOL(pci_add_resource);
 
 void pci_free_resource_list(struct list_head *resources)
 {
-        struct pci_bus_resource *bus_res, *tmp;
+        struct pci_host_bridge_window *window, *tmp;
 
-        list_for_each_entry_safe(bus_res, tmp, resources, list) {
-                list_del(&bus_res->list);
-                kfree(bus_res);
+        list_for_each_entry_safe(window, tmp, resources, list) {
+                list_del(&window->list);
+                kfree(window);
         }
 }
 EXPORT_SYMBOL(pci_free_resource_list);
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index dc904bd4b569..36c22032ea14 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -15,6 +15,8 @@
 #define CARDBUS_LATENCY_TIMER   176     /* secondary latency timer */
 #define CARDBUS_RESERVE_BUSNR   3
 
+static LIST_HEAD(pci_host_bridges);
+
 /* Ugh.  Need to stop exporting this to modules. */
 LIST_HEAD(pci_root_buses);
 EXPORT_SYMBOL(pci_root_buses);
@@ -42,6 +44,82 @@ int no_pci_devices(void)
 }
 EXPORT_SYMBOL(no_pci_devices);
 
+static struct pci_host_bridge *pci_host_bridge(struct pci_dev *dev)
+{
+        struct pci_bus *bus;
+        struct pci_host_bridge *bridge;
+
+        bus = dev->bus;
+        while (bus->parent)
+                bus = bus->parent;
+
+        list_for_each_entry(bridge, &pci_host_bridges, list) {
+                if (bridge->bus == bus)
+                        return bridge;
+        }
+
+        return NULL;
+}
+
+static bool resource_contains(struct resource *res1, struct resource *res2)
+{
+        return res1->start <= res2->start && res1->end >= res2->end;
+}
+
+void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
+                             struct resource *res)
+{
+        struct pci_host_bridge *bridge = pci_host_bridge(dev);
+        struct pci_host_bridge_window *window;
+        resource_size_t offset = 0;
+
+        list_for_each_entry(window, &bridge->windows, list) {
+                if (resource_type(res) != resource_type(window->res))
+                        continue;
+
+                if (resource_contains(window->res, res)) {
+                        offset = window->offset;
+                        break;
+                }
+        }
+
+        region->start = res->start - offset;
+        region->end = res->end - offset;
+}
+EXPORT_SYMBOL(pcibios_resource_to_bus);
+
+static bool region_contains(struct pci_bus_region *region1,
+                            struct pci_bus_region *region2)
+{
+        return region1->start <= region2->start && region1->end >= region2->end;
+}
+
+void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+                             struct pci_bus_region *region)
+{
+        struct pci_host_bridge *bridge = pci_host_bridge(dev);
+        struct pci_host_bridge_window *window;
+        struct pci_bus_region bus_region;
+        resource_size_t offset = 0;
+
+        list_for_each_entry(window, &bridge->windows, list) {
+                if (resource_type(res) != resource_type(window->res))
+                        continue;
+
+                bus_region.start = window->res->start - window->offset;
+                bus_region.end = window->res->end - window->offset;
+
+                if (region_contains(&bus_region, region)) {
+                        offset = window->offset;
+                        break;
+                }
+        }
+
+        res->start = region->start + offset;
+        res->end = region->end + offset;
+}
+EXPORT_SYMBOL(pcibios_bus_to_resource);
+
 /*
  * PCI Bus Class
  */
@@ -135,6 +213,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 {
         u32 l, sz, mask;
         u16 orig_cmd;
+        struct pci_bus_region region;
 
         mask = type ? PCI_ROM_ADDRESS_MASK : ~0;
 
@@ -214,11 +293,13 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
                         /* Address above 32-bit boundary; disable the BAR */
                         pci_write_config_dword(dev, pos, 0);
                         pci_write_config_dword(dev, pos + 4, 0);
-                        res->start = 0;
-                        res->end = sz64;
+                        region.start = 0;
+                        region.end = sz64;
+                        pcibios_bus_to_resource(dev, res, &region);
                 } else {
-                        res->start = l64;
-                        res->end = l64 + sz64;
+                        region.start = l64;
+                        region.end = l64 + sz64;
+                        pcibios_bus_to_resource(dev, res, &region);
                         dev_printk(KERN_DEBUG, &dev->dev, "reg %x: %pR\n",
                                    pos, res);
                 }
@@ -228,8 +309,9 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
                 if (!sz)
                         goto fail;
 
-                res->start = l;
-                res->end = l + sz;
+                region.start = l;
+                region.end = l + sz;
+                pcibios_bus_to_resource(dev, res, &region);
 
                 dev_printk(KERN_DEBUG, &dev->dev, "reg %x: %pR\n", pos, res);
         }
@@ -266,7 +348,8 @@ static void __devinit pci_read_bridge_io(struct pci_bus *child)
         struct pci_dev *dev = child->self;
         u8 io_base_lo, io_limit_lo;
         unsigned long base, limit;
-        struct resource *res;
+        struct pci_bus_region region;
+        struct resource *res, res2;
 
         res = child->resource[0];
         pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo);
@@ -284,10 +367,13 @@ static void __devinit pci_read_bridge_io(struct pci_bus *child)
 
         if (base && base <= limit) {
                 res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
+                region.start = base;
+                region.end = limit + 0xfff;
+                pcibios_bus_to_resource(dev, &res2, &region);
                 if (!res->start)
-                        res->start = base;
+                        res->start = res2.start;
                 if (!res->end)
-                        res->end = limit + 0xfff;
+                        res->end = res2.end;
                 dev_printk(KERN_DEBUG, &dev->dev, "  bridge window %pR\n", res);
         }
 }
@@ -297,6 +383,7 @@ static void __devinit pci_read_bridge_mmio(struct pci_bus *child)
         struct pci_dev *dev = child->self;
         u16 mem_base_lo, mem_limit_lo;
         unsigned long base, limit;
+        struct pci_bus_region region;
         struct resource *res;
 
         res = child->resource[1];
@@ -306,8 +393,9 @@ static void __devinit pci_read_bridge_mmio(struct pci_bus *child)
         limit = (mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16;
         if (base && base <= limit) {
                 res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
-                res->start = base;
-                res->end = limit + 0xfffff;
+                region.start = base;
+                region.end = limit + 0xfffff;
+                pcibios_bus_to_resource(dev, res, &region);
                 dev_printk(KERN_DEBUG, &dev->dev, "  bridge window %pR\n", res);
         }
 }
@@ -317,6 +405,7 @@ static void __devinit pci_read_bridge_mmio_pref(struct pci_bus *child)
         struct pci_dev *dev = child->self;
         u16 mem_base_lo, mem_limit_lo;
         unsigned long base, limit;
+        struct pci_bus_region region;
         struct resource *res;
 
         res = child->resource[2];
@@ -353,8 +442,9 @@ static void __devinit pci_read_bridge_mmio_pref(struct pci_bus *child)
                                          IORESOURCE_MEM | IORESOURCE_PREFETCH;
                 if (res->flags & PCI_PREF_RANGE_TYPE_64)
                         res->flags |= IORESOURCE_MEM_64;
-                res->start = base;
-                res->end = limit + 0xfffff;
+                region.start = base;
+                region.end = limit + 0xfffff;
+                pcibios_bus_to_resource(dev, res, &region);
                 dev_printk(KERN_DEBUG, &dev->dev, "  bridge window %pR\n", res);
         }
 }
@@ -900,6 +990,8 @@ int pci_setup_device(struct pci_dev *dev)
         u8 hdr_type;
         struct pci_slot *slot;
         int pos = 0;
+        struct pci_bus_region region;
+        struct resource *res;
 
         if (pci_read_config_byte(dev, PCI_HEADER_TYPE, &hdr_type))
                 return -EIO;
@@ -961,20 +1053,28 @@ int pci_setup_device(struct pci_dev *dev)
                         u8 progif;
                         pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
                         if ((progif & 1) == 0) {
-                                dev->resource[0].start = 0x1F0;
-                                dev->resource[0].end = 0x1F7;
-                                dev->resource[0].flags = LEGACY_IO_RESOURCE;
-                                dev->resource[1].start = 0x3F6;
-                                dev->resource[1].end = 0x3F6;
-                                dev->resource[1].flags = LEGACY_IO_RESOURCE;
+                                region.start = 0x1F0;
+                                region.end = 0x1F7;
+                                res = &dev->resource[0];
+                                res->flags = LEGACY_IO_RESOURCE;
+                                pcibios_bus_to_resource(dev, res, &region);
+                                region.start = 0x3F6;
+                                region.end = 0x3F6;
+                                res = &dev->resource[1];
+                                res->flags = LEGACY_IO_RESOURCE;
+                                pcibios_bus_to_resource(dev, res, &region);
                         }
                         if ((progif & 4) == 0) {
-                                dev->resource[2].start = 0x170;
-                                dev->resource[2].end = 0x177;
-                                dev->resource[2].flags = LEGACY_IO_RESOURCE;
-                                dev->resource[3].start = 0x376;
-                                dev->resource[3].end = 0x376;
-                                dev->resource[3].flags = LEGACY_IO_RESOURCE;
+                                region.start = 0x170;
+                                region.end = 0x177;
+                                res = &dev->resource[2];
+                                res->flags = LEGACY_IO_RESOURCE;
+                                pcibios_bus_to_resource(dev, res, &region);
+                                region.start = 0x376;
+                                region.end = 0x376;
+                                res = &dev->resource[3];
+                                res->flags = LEGACY_IO_RESOURCE;
+                                pcibios_bus_to_resource(dev, res, &region);
                         }
                 }
                 break;
@@ -1543,21 +1643,27 @@ unsigned int __devinit pci_scan_child_bus(struct pci_bus *bus)
 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
                 struct pci_ops *ops, void *sysdata, struct list_head *resources)
 {
-        int error, i;
+        int error;
+        struct pci_host_bridge *bridge;
         struct pci_bus *b, *b2;
         struct device *dev;
-        struct pci_bus_resource *bus_res, *n;
+        struct pci_host_bridge_window *window, *n;
         struct resource *res;
+        resource_size_t offset;
+        char bus_addr[64];
+        char *fmt;
+
+        bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
+        if (!bridge)
+                return NULL;
 
         b = pci_alloc_bus();
         if (!b)
-                return NULL;
+                goto err_bus;
 
         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-        if (!dev) {
-                kfree(b);
-                return NULL;
-        }
+        if (!dev)
+                goto err_dev;
 
         b->sysdata = sysdata;
         b->ops = ops;
@@ -1569,10 +1675,6 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
                 goto err_out;
         }
 
-        down_write(&pci_bus_sem);
-        list_add_tail(&b->node, &pci_root_buses);
-        up_write(&pci_bus_sem);
-
         dev->parent = parent;
         dev->release = pci_release_bus_bridge_dev;
         dev_set_name(dev, "pci%04x:%02x", pci_domain_nr(b), bus);
@@ -1598,31 +1700,53 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
 
         b->number = b->secondary = bus;
 
-        /* Add initial resources to the bus */
-        list_for_each_entry_safe(bus_res, n, resources, list)
-                list_move_tail(&bus_res->list, &b->resources);
+        bridge->bus = b;
+        INIT_LIST_HEAD(&bridge->windows);
 
         if (parent)
                 dev_info(parent, "PCI host bridge to bus %s\n", dev_name(&b->dev));
         else
                 printk(KERN_INFO "PCI host bridge to bus %s\n", dev_name(&b->dev));
 
-        pci_bus_for_each_resource(b, res, i) {
-                if (res)
-                        dev_info(&b->dev, "root bus resource %pR\n", res);
+        /* Add initial resources to the bus */
+        list_for_each_entry_safe(window, n, resources, list) {
+                list_move_tail(&window->list, &bridge->windows);
+                res = window->res;
+                offset = window->offset;
+                pci_bus_add_resource(b, res, 0);
+                if (offset) {
+                        if (resource_type(res) == IORESOURCE_IO)
+                                fmt = " (bus address [%#06llx-%#06llx])";
+                        else
+                                fmt = " (bus address [%#010llx-%#010llx])";
+                        snprintf(bus_addr, sizeof(bus_addr), fmt,
+                                 (unsigned long long) (res->start - offset),
+                                 (unsigned long long) (res->end - offset));
+                } else
+                        bus_addr[0] = '\0';
+                dev_info(&b->dev, "root bus resource %pR%s\n", res, bus_addr);
         }
 
+        down_write(&pci_bus_sem);
+        list_add_tail(&bridge->list, &pci_host_bridges);
+        list_add_tail(&b->node, &pci_root_buses);
+        up_write(&pci_bus_sem);
+
         return b;
 
 class_dev_reg_err:
         device_unregister(dev);
 dev_reg_err:
         down_write(&pci_bus_sem);
+        list_del(&bridge->list);
         list_del(&b->node);
         up_write(&pci_bus_sem);
 err_out:
         kfree(dev);
+err_dev:
         kfree(b);
+err_bus:
+        kfree(bridge);
         return NULL;
 }
 
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index c9214a14b49b..8fa2d4be88de 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -25,8 +25,11 @@
 #include <linux/ioport.h>
 #include <linux/cache.h>
 #include <linux/slab.h>
+#include <asm-generic/pci-bridge.h>
 #include "pci.h"
 
+unsigned int pci_flags;
+
 struct pci_dev_resource {
         struct list_head list;
         struct resource *res;