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 | |
| parent | drm/amdgpu: refactoring mailbox to fix TDR handshake bugs(v2) (diff) | |
| download | linux-dev-5d95109815493e273a2ef9010df0939aa3cfe10f.tar.xz linux-dev-5d95109815493e273a2ef9010df0939aa3cfe10f.zip | |
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')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo.c | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo_util.c | 24 |
2 files changed, 36 insertions, 3 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index ad142a92eb80..98e06f8bf23b 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -622,14 +622,23 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, reservation_object_assert_held(bo->resv); + placement.num_placement = 0; + placement.num_busy_placement = 0; + bdev->driver->evict_flags(bo, &placement); + + if (!placement.num_placement && !placement.num_busy_placement) { + ret = ttm_bo_pipeline_gutting(bo); + if (ret) + return ret; + + return ttm_tt_create(bo, false); + } + evict_mem = bo->mem; evict_mem.mm_node = NULL; evict_mem.bus.io_reserved_vm = false; evict_mem.bus.io_reserved_count = 0; - placement.num_placement = 0; - placement.num_busy_placement = 0; - bdev->driver->evict_flags(bo, &placement); ret = ttm_bo_mem_space(bo, &placement, &evict_mem, ctx); if (ret) { if (ret != -ERESTARTSYS) { diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index 6d6a3f46143b..1f730b3f18e5 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; +} |