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Diffstat (limited to 'arch/powerpc/kernel/pci-common.c')
-rw-r--r--arch/powerpc/kernel/pci-common.c79
1 files changed, 18 insertions, 61 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index f93942b4b6a6..a5c0153ede37 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -412,36 +412,6 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
}
/*
- * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
- * device mapping.
- */
-static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
- pgprot_t protection,
- enum pci_mmap_state mmap_state,
- int write_combine)
-{
-
- /* Write combine is always 0 on non-memory space mappings. On
- * memory space, if the user didn't pass 1, we check for a
- * "prefetchable" resource. This is a bit hackish, but we use
- * this to workaround the inability of /sysfs to provide a write
- * combine bit
- */
- if (mmap_state != pci_mmap_mem)
- write_combine = 0;
- else if (write_combine == 0) {
- if (rp->flags & IORESOURCE_PREFETCH)
- write_combine = 1;
- }
-
- /* XXX would be nice to have a way to ask for write-through */
- if (write_combine)
- return pgprot_noncached_wc(protection);
- else
- return pgprot_noncached(protection);
-}
-
-/*
* This one is used by /dev/mem and fbdev who have no clue about the
* PCI device, it tries to find the PCI device first and calls the
* above routine
@@ -514,9 +484,10 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
return -EINVAL;
vma->vm_pgoff = offset >> PAGE_SHIFT;
- vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
- vma->vm_page_prot,
- mmap_state, write_combine);
+ if (write_combine)
+ vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot);
+ else
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
@@ -666,39 +637,25 @@ void pci_resource_to_user(const struct pci_dev *dev, int bar,
const struct resource *rsrc,
resource_size_t *start, resource_size_t *end)
{
- struct pci_controller *hose = pci_bus_to_host(dev->bus);
- resource_size_t offset = 0;
+ struct pci_bus_region region;
- if (hose == NULL)
+ if (rsrc->flags & IORESOURCE_IO) {
+ pcibios_resource_to_bus(dev->bus, &region,
+ (struct resource *) rsrc);
+ *start = region.start;
+ *end = region.end;
return;
+ }
- if (rsrc->flags & IORESOURCE_IO)
- offset = (unsigned long)hose->io_base_virt - _IO_BASE;
-
- /* We pass a fully fixed up address to userland for MMIO instead of
- * a BAR value because X is lame and expects to be able to use that
- * to pass to /dev/mem !
- *
- * That means that we'll have potentially 64 bits values where some
- * userland apps only expect 32 (like X itself since it thinks only
- * Sparc has 64 bits MMIO) but if we don't do that, we break it on
- * 32 bits CHRPs :-(
- *
- * Hopefully, the sysfs insterface is immune to that gunk. Once X
- * has been fixed (and the fix spread enough), we can re-enable the
- * 2 lines below and pass down a BAR value to userland. In that case
- * we'll also have to re-enable the matching code in
- * __pci_mmap_make_offset().
+ /* We pass a CPU physical address to userland for MMIO instead of a
+ * BAR value because X is lame and expects to be able to use that
+ * to pass to /dev/mem!
*
- * BenH.
+ * That means we may have 64-bit values where some apps only expect
+ * 32 (like X itself since it thinks only Sparc has 64-bit MMIO).
*/
-#if 0
- else if (rsrc->flags & IORESOURCE_MEM)
- offset = hose->pci_mem_offset;
-#endif
-
- *start = rsrc->start - offset;
- *end = rsrc->end - offset;
+ *start = rsrc->start;
+ *end = rsrc->end;
}
/**