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| author |   Christian König <christian.koenig@amd.com> | 2021-11-26 14:12:42 +0100 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2022-04-07 12:53:54 +0200 |
| commit | b29895e18304feb7e8afc6388db7ece60327b23c (patch) | |
| tree | 655d830be03f3088f5f5293372a49d592dbd533c /drivers/gpu/drm/ttm/ttm_bo_util.c | |
| parent | dma-buf & drm/amdgpu: remove dma_resv workaround (diff) | |
| download | wireguard-linux-b29895e18304feb7e8afc6388db7ece60327b23c.tar.xz wireguard-linux-b29895e18304feb7e8afc6388db7ece60327b23c.zip | |
dma-buf: add DMA_RESV_USAGE_KERNEL v3
Add an usage for kernel submissions. Waiting for those are mandatory for
dynamic DMA-bufs.
As a precaution this patch also changes all occurrences where fences are
added as part of memory management in TTM, VMWGFX and i915 to use the
new value because it now becomes possible for drivers to ignore fences
with the WRITE usage.
v2: use "must" in documentation, fix whitespaces
v3: separate out some driver changes and better document why some
changes should still be part of this patch.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220407085946.744568-5-christian.koenig@amd.com
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_bo_util.c')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo_util.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index 7a96a1db13a7..99deb45894f4 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_util.c +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -508,7 +508,7 @@ static int ttm_bo_move_to_ghost(struct ttm_buffer_object *bo, return ret; dma_resv_add_fence(&ghost_obj->base._resv, fence, - DMA_RESV_USAGE_WRITE); + DMA_RESV_USAGE_KERNEL); /** * If we're not moving to fixed memory, the TTM object @@ -562,7 +562,7 @@ int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, struct ttm_resource_manager *man = ttm_manager_type(bdev, new_mem->mem_type); int ret = 0; - dma_resv_add_fence(bo->base.resv, fence, DMA_RESV_USAGE_WRITE); + dma_resv_add_fence(bo->base.resv, fence, DMA_RESV_USAGE_KERNEL); if (!evict) ret = ttm_bo_move_to_ghost(bo, fence, man->use_tt); else if (!from->use_tt && pipeline) |