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authorAlexandre Courbot <acourbot@nvidia.com>2014-08-04 18:28:54 +0900
committerBen Skeggs <bskeggs@redhat.com>2014-08-10 01:08:03 +1000
commit3d50d4dcb0c4e0e01f45ae15df34ab6a04fb35bb (patch)
treee4185162685c07ad2b592cf7c6bcb882cfb660e4 /include/drm
parent7963e9db1b1f842fdc53309baa8714d38e9f5681 (diff)
downloadlinux-3d50d4dcb0c4e0e01f45ae15df34ab6a04fb35bb.tar.bz2
drm/ttm: expose CPU address of DMA-allocated pages
Pages allocated using the DMA API have a coherent memory mapping. Make this mapping visible to drivers so they can decide to use it instead of creating their own redundant one. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: David Airlie <airlied@linux.ie> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/ttm/ttm_bo_driver.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 202f0a7171e8..1d9f0f1ff52d 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -133,6 +133,7 @@ struct ttm_tt {
* struct ttm_dma_tt
*
* @ttm: Base ttm_tt struct.
+ * @cpu_address: The CPU address of the pages
* @dma_address: The DMA (bus) addresses of the pages
* @pages_list: used by some page allocation backend
*
@@ -142,6 +143,7 @@ struct ttm_tt {
*/
struct ttm_dma_tt {
struct ttm_tt ttm;
+ void **cpu_address;
dma_addr_t *dma_address;
struct list_head pages_list;
};