diff options
Diffstat (limited to 'linux-core/drm_bo_move.c')
| -rw-r--r-- | linux-core/drm_bo_move.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/linux-core/drm_bo_move.c b/linux-core/drm_bo_move.c index b06a09f0..30e0f43f 100644 --- a/linux-core/drm_bo_move.c +++ b/linux-core/drm_bo_move.c @@ -595,3 +595,36 @@ void drm_bo_kunmap(struct drm_bo_kmap_obj *map) map->page = NULL; } EXPORT_SYMBOL(drm_bo_kunmap); + +int drm_bo_pfn_prot(struct drm_buffer_object *bo, + unsigned long dst_offset, + unsigned long *pfn, + pgprot_t *prot) +{ + struct drm_bo_mem_reg *mem = &bo->mem; + struct drm_device *dev = bo->dev; + unsigned long bus_offset; + unsigned long bus_size; + unsigned long bus_base; + struct drm_mem_type_manager *man = &dev->bm.man[mem->mem_type]; + int ret; + + ret = drm_bo_pci_offset(dev, mem, &bus_base, &bus_offset, + &bus_size); + if (ret) + return -EINVAL; + + if (bus_size != 0) + *pfn = (bus_base + bus_offset + dst_offset) >> PAGE_SHIFT; + else if (!bo->ttm) + return -EINVAL; + else + *pfn = page_to_pfn(drm_ttm_get_page(bo->ttm, dst_offset >> PAGE_SHIFT)); + + *prot = (mem->flags & DRM_BO_FLAG_CACHED) ? + PAGE_KERNEL : drm_kernel_io_prot(man->drm_bus_maptype); + + return 0; +} +EXPORT_SYMBOL(drm_bo_pfn_prot); + |