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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-10-03 19:49:32 +1000
committerJesse Barnes <jbarnes@virtuousgeek.org>2008-10-20 11:01:46 -0700
commitf19aeb1f3638b7bb4ca21eb361f004fac2bfe259 (patch)
tree2990881affb22ba426149e8d4c317fe9df9992c7 /arch/ia64/pci/pci.c
parentf393d9b130423a7a47c751b26df07ceaa5dc76a9 (diff)
PCI: Add ability to mmap legacy_io on some platforms
This adds the ability to mmap legacy IO space to the legacy_io files in sysfs on platforms that support it. This will allow to clean up X to use this instead of /dev/mem for legacy IO accesses such as those performed by Int10. While at it I moved pci_create/remove_legacy_files() to pci-sysfs.c where I think they belong, thus making more things statis in there and cleaned up some spurrious prototypes in the ia64 pci.h file Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'arch/ia64/pci/pci.c')
-rw-r--r--arch/ia64/pci/pci.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 7545037a862..211fcfd115f 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -614,12 +614,17 @@ char *ia64_pci_get_legacy_mem(struct pci_bus *bus)
* vector to get the base address.
*/
int
-pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma)
+pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state)
{
unsigned long size = vma->vm_end - vma->vm_start;
pgprot_t prot;
char *addr;
+ /* We only support mmap'ing of legacy memory space */
+ if (mmap_state != pci_mmap_mem)
+ return -ENOSYS;
+
/*
* Avoid attribute aliasing. See Documentation/ia64/aliasing.txt
* for more details.