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| author |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-02-02 16:55:47 +1100 |
|---|---|---|
| committer |   Dave Airlie <airlied@redhat.com> | 2009-03-13 14:23:57 +1000 |
| commit | 41c2e75e60200a860a74b7c84a6375c105e7437f (patch) | |
| tree | 18e97662d6859eead4de816e121d001b34a7352a /drivers/gpu/drm/drm_vm.c | |
| parent | drm: Split drm_map and drm_local_map (diff) | |
| download | linux-dev-41c2e75e60200a860a74b7c84a6375c105e7437f.tar.xz linux-dev-41c2e75e60200a860a74b7c84a6375c105e7437f.zip | |
drm: Make drm_local_map use a resource_size_t offset
This changes drm_local_map to use a resource_size for its "offset"
member instead of an unsigned long, thus allowing 32-bit machines
with a >32-bit physical address space to be able to store there
their register or framebuffer addresses when those are above 4G,
such as when using a PCI video card on a recent AMCC 440 SoC.
This patch isn't as "trivial" as it sounds: A few functions needed
to have some unsigned long/int changed to resource_size_t and a few
printk's had to be adjusted.
But also, because userspace isn't capable of passing such offsets,
I had to modify drm_find_matching_map() to ignore the offset passed
in for maps of type _DRM_FRAMEBUFFER or _DRM_REGISTERS.
If we ever support multiple _DRM_FRAMEBUFFER or _DRM_REGISTERS maps
for a given device, we might have to change that trick, but I don't
think that happens on any current driver.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers/gpu/drm/drm_vm.c')
| -rw-r--r-- | drivers/gpu/drm/drm_vm.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c index 0d8bbd72ec55..22f76567ac7d 100644 --- a/drivers/gpu/drm/drm_vm.c +++ b/drivers/gpu/drm/drm_vm.c @@ -115,9 +115,9 @@ static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) * Using vm_pgoff as a selector forces us to use this unusual * addressing scheme. */ - unsigned long offset = (unsigned long)vmf->virtual_address - - vma->vm_start; - unsigned long baddr = map->offset + offset; + resource_size_t offset = (unsigned long)vmf->virtual_address - + vma->vm_start; + resource_size_t baddr = map->offset + offset; struct drm_agp_mem *agpmem; struct page *page; @@ -149,8 +149,10 @@ static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) vmf->page = page; DRM_DEBUG - ("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n", - baddr, __va(agpmem->memory->memory[offset]), offset, + ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n", + (unsigned long long)baddr, + __va(agpmem->memory->memory[offset]), + (unsigned long long)offset, page_count(page)); return 0; } @@ -512,14 +514,14 @@ static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) return 0; } -unsigned long drm_core_get_map_ofs(struct drm_local_map * map) +resource_size_t drm_core_get_map_ofs(struct drm_local_map * map) { return map->offset; } EXPORT_SYMBOL(drm_core_get_map_ofs); -unsigned long drm_core_get_reg_ofs(struct drm_device *dev) +resource_size_t drm_core_get_reg_ofs(struct drm_device *dev) { #ifdef __alpha__ return dev->hose->dense_mem_base - dev->hose->mem_space->start; @@ -548,7 +550,7 @@ int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) struct drm_file *priv = filp->private_data; struct drm_device *dev = priv->minor->dev; struct drm_local_map *map = NULL; - unsigned long offset = 0; + resource_size_t offset = 0; struct drm_hash_item *hash; DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", @@ -623,9 +625,9 @@ int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) vma->vm_page_prot)) return -EAGAIN; DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," - " offset = 0x%lx\n", + " offset = 0x%llx\n", map->type, - vma->vm_start, vma->vm_end, map->offset + offset); + vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset)); vma->vm_ops = &drm_vm_ops; break; case _DRM_CONSISTENT: |