diff options
| author | Christian König <christian.koenig@amd.com> | 2018-02-20 15:35:21 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-03-14 14:38:27 -0500 |
| commit | 5d95109815493e273a2ef9010df0939aa3cfe10f (patch) | |
| tree | 69dbd8e553135d0d6b6c7868d16d42238d65bbe4 /drivers/gpu/drm/ttm/ttm_bo_util.c | |
| parent | 48527e5296edc7b952fb2c1c40fd8c388cc935ed (diff) | |
drm/ttm: add ttm_bo_pipeline_gutting
Allows us to gut a BO of it's backing store when the driver says that it
isn't needed any more.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Roger He <Hongbo.He@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_bo_util.c')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo_util.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index 6d6a3f46143be..1f730b3f18e5a 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_util.c +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -801,3 +801,27 @@ int ttm_bo_pipeline_move(struct ttm_buffer_object *bo, return 0; } EXPORT_SYMBOL(ttm_bo_pipeline_move); + +int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo) +{ + struct ttm_buffer_object *ghost; + int ret; + + ret = ttm_buffer_object_transfer(bo, &ghost); + if (ret) + return ret; + + ret = reservation_object_copy_fences(ghost->resv, bo->resv); + /* Last resort, wait for the BO to be idle when we are OOM */ + if (ret) + ttm_bo_wait(bo, false, false); + + memset(&bo->mem, 0, sizeof(bo->mem)); + bo->mem.mem_type = TTM_PL_SYSTEM; + bo->ttm = NULL; + + ttm_bo_unreserve(ghost); + ttm_bo_unref(&ghost); + + return 0; +} |