From ea642c3216cb2a60d1c0e760ae47ee85c9c16447 Mon Sep 17 00:00:00 2001 From: Christian König Date: Tue, 28 Mar 2017 16:54:50 +0200 Subject: drm/ttm: add io_mem_pfn callback This allows the driver to handle io_mem mappings on their own. Signed-off-by: Christian König Reviewed-by: Michel Dänzer Reviewed-by: Nicolai Hähnle Signed-off-by: Alex Deucher --- include/drm/ttm/ttm_bo_api.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/drm/ttm/ttm_bo_api.h') diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index 0b1ce05e2c2e..fa07be197945 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -710,6 +710,17 @@ extern void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map); extern int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo); +/** + * ttm_bo_default_iomem_pfn - get a pfn for a page offset + * + * @bo: the BO we need to look up the pfn for + * @page_offset: offset inside the BO to look up. + * + * Calculate the PFN for iomem based mappings during page fault + */ +unsigned long ttm_bo_default_io_mem_pfn(struct ttm_buffer_object *bo, + unsigned long page_offset); + /** * ttm_bo_mmap - mmap out of the ttm device address space. * -- cgit v1.2.3-55-g7522