7 files changed, 97 insertions, 13 deletions

diff --git a/arch/ppc/kernel/pci.c b/arch/ppc/kernel/pci.c
index 6d7b92d72458..70cfb6ffd877 100644
--- a/arch/ppc/kernel/pci.c
+++ b/arch/ppc/kernel/pci.c
@@ -1495,7 +1495,7 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
                 *offset += hose->pci_mem_offset;
                 res_bit = IORESOURCE_MEM;
         } else {
-                io_offset = (unsigned long)hose->io_base_virt;
+                io_offset = hose->io_base_virt - ___IO_BASE;
                 *offset += io_offset;
                 res_bit = IORESOURCE_IO;
         }
@@ -1522,7 +1522,7 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
 
                 /* found it! construct the final physical address */
                 if (mmap_state == pci_mmap_io)
-                        *offset += hose->io_base_phys - _IO_BASE;
+                        *offset += hose->io_base_phys - io_offset;
                 return rp;
         }
 
@@ -1739,6 +1739,23 @@ long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn)
         return result;
 }
 
+void pci_resource_to_user(const struct pci_dev *dev, int bar,
+                          const struct resource *rsrc,
+                          u64 *start, u64 *end)
+{
+        struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
+        unsigned long offset = 0;
+
+        if (hose == NULL)
+                return;
+
+        if (rsrc->flags & IORESOURCE_IO)
+                offset = ___IO_BASE - hose->io_base_virt + hose->io_base_phys;
+
+        *start = rsrc->start + offset;
+        *end = rsrc->end + offset;
+}
+
 void __init
 pci_init_resource(struct resource *res, unsigned long start, unsigned long end,
                   int flags, char *name)
diff --git a/arch/ppc64/kernel/pci.c b/arch/ppc64/kernel/pci.c
index 580676f87d23..ae6f579d3fa0 100644
--- a/arch/ppc64/kernel/pci.c
+++ b/arch/ppc64/kernel/pci.c
@@ -351,7 +351,7 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
                 *offset += hose->pci_mem_offset;
                 res_bit = IORESOURCE_MEM;
         } else {
-                io_offset = (unsigned long)hose->io_base_virt;
+                io_offset = (unsigned long)hose->io_base_virt - pci_io_base;
                 *offset += io_offset;
                 res_bit = IORESOURCE_IO;
         }
@@ -378,7 +378,7 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
 
                 /* found it! construct the final physical address */
                 if (mmap_state == pci_mmap_io)
-                        *offset += hose->io_base_phys - io_offset;
+                        *offset += hose->io_base_phys - io_offset;
                 return rp;
         }
 
@@ -944,4 +944,22 @@ int pci_read_irq_line(struct pci_dev *pci_dev)
 }
 EXPORT_SYMBOL(pci_read_irq_line);
 
+void pci_resource_to_user(const struct pci_dev *dev, int bar,
+                          const struct resource *rsrc,
+                          u64 *start, u64 *end)
+{
+        struct pci_controller *hose = pci_bus_to_host(dev->bus);
+        unsigned long offset = 0;
+
+        if (hose == NULL)
+                return;
+
+        if (rsrc->flags & IORESOURCE_IO)
+                offset = pci_io_base - (unsigned long)hose->io_base_virt +
+                        hose->io_base_phys;
+
+        *start = rsrc->start + offset;
+        *end = rsrc->end + offset;
+}
+
 #endif /* CONFIG_PPC_MULTIPLATFORM */
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index a15f94072a6f..cc9d65388e62 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -60,15 +60,18 @@ resource_show(struct device * dev, struct device_attribute *attr, char * buf)
         char * str = buf;
         int i;
         int max = 7;
+        u64 start, end;
 
         if (pci_dev->subordinate)
                 max = DEVICE_COUNT_RESOURCE;
 
         for (i = 0; i < max; i++) {
-                str += sprintf(str,"0x%016lx 0x%016lx 0x%016lx\n",
-                               pci_resource_start(pci_dev,i),
-                               pci_resource_end(pci_dev,i),
-                               pci_resource_flags(pci_dev,i));
+                struct resource *res =  &pci_dev->resource[i];
+                pci_resource_to_user(pci_dev, i, res, &start, &end);
+                str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n",
+                               (unsigned long long)start,
+                               (unsigned long long)end,
+                               (unsigned long long)res->flags);
         }
         return (str - buf);
 }
@@ -313,8 +316,21 @@ pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
                                                        struct device, kobj));
         struct resource *res = (struct resource *)attr->private;
         enum pci_mmap_state mmap_type;
+        u64 start, end;
+        int i;
 
-        vma->vm_pgoff += res->start >> PAGE_SHIFT;
+        for (i = 0; i < PCI_ROM_RESOURCE; i++)
+                if (res == &pdev->resource[i])
+                        break;
+        if (i >= PCI_ROM_RESOURCE)
+                return -ENODEV;
+
+        /* pci_mmap_page_range() expects the same kind of entry as coming
+         * from /proc/bus/pci/ which is a "user visible" value. If this is
+         * different from the resource itself, arch will do necessary fixup.
+         */
+        pci_resource_to_user(pdev, i, res, &start, &end);
+        vma->vm_pgoff += start >> PAGE_SHIFT;
         mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
 
         return pci_mmap_page_range(pdev, vma, mmap_type, 0);
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index e68bbfb1e7c3..7988fc8df3fd 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -355,14 +355,20 @@ static int show_device(struct seq_file *m, void *v)
                         dev->device,
                         dev->irq);
         /* Here should be 7 and not PCI_NUM_RESOURCES as we need to preserve compatibility */
-        for(i=0; i<7; i++)
+        for (i=0; i<7; i++) {
+                u64 start, end;
+                pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
                 seq_printf(m, LONG_FORMAT,
-                        dev->resource[i].start |
+                        ((unsigned long)start) |
                         (dev->resource[i].flags & PCI_REGION_FLAG_MASK));
-        for(i=0; i<7; i++)
+        }
+        for (i=0; i<7; i++) {
+                u64 start, end;
+                pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
                 seq_printf(m, LONG_FORMAT,
                         dev->resource[i].start < dev->resource[i].end ?
-                        dev->resource[i].end - dev->resource[i].start + 1 : 0);
+                        (unsigned long)(end - start) + 1 : 0);
+        }
         seq_putc(m, '\t');
         if (drv)
                 seq_printf(m, "%s", drv->name);
diff --git a/include/asm-ppc/pci.h b/include/asm-ppc/pci.h
index ce5ae6d048f5..002e7b305777 100644
--- a/include/asm-ppc/pci.h
+++ b/include/asm-ppc/pci.h
@@ -103,6 +103,12 @@ extern pgprot_t	pci_phys_mem_access_prot(struct file *file,
                                          unsigned long size,
                                          pgprot_t prot);
 
+#define HAVE_ARCH_PCI_RESOURCE_TO_USER
+extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
+                                 const struct resource *rsrc,
+                                 u64 *start, u64 *end);
+
+
 #endif  /* __KERNEL__ */
 
 #endif /* __PPC_PCI_H */
diff --git a/include/asm-ppc64/pci.h b/include/asm-ppc64/pci.h
index 6cd593f660a0..411bf5dee394 100644
--- a/include/asm-ppc64/pci.h
+++ b/include/asm-ppc64/pci.h
@@ -136,6 +136,13 @@ extern pgprot_t	pci_phys_mem_access_prot(struct file *file,
                                          unsigned long size,
                                          pgprot_t prot);
 
+#ifdef CONFIG_PPC_MULTIPLATFORM
+#define HAVE_ARCH_PCI_RESOURCE_TO_USER
+extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
+                                 const struct resource *rsrc,
+                                 u64 *start, u64 *end);
+#endif /* CONFIG_PPC_MULTIPLATFORM */
+
 
 #endif  /* __KERNEL__ */
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 0e9844929fe3..cfa1455848f4 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1020,6 +1020,20 @@ static inline char *pci_name(struct pci_dev *pdev)
 #define pci_pretty_name(dev) ""
 #endif
 
+
+/* Some archs don't want to expose struct resource to userland as-is
+ * in sysfs and /proc
+ */
+#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
+static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
+                const struct resource *rsrc, u64 *start, u64 *end)
+{
+        *start = rsrc->start;
+        *end = rsrc->end;
+}
+#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
+
+
 /*
  *  The world is not perfect and supplies us with broken PCI devices.
  *  For at least a part of these bugs we need a work-around, so both