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| author | Christian König <christian.koenig@amd.com> | 2020-09-21 14:05:54 +0300 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2020-09-24 17:16:49 +0300 |
| commit | deb0814b43f370a448a498409d949e38c9d8f02e (patch) | |
| tree | 1951279e830715acf9e6644024e0ddea3ace76e8 /include | |
| parent | 8e3784dfef8a03143b13e7e4011f276a954f1bc6 (diff) | |
| download | linux-deb0814b43f370a448a498409d949e38c9d8f02e.tar.xz | |
drm/ttm: add ttm_bo_pin()/ttm_bo_unpin() v2
As an alternative to the placement flag add a
pin count to the ttm buffer object.
v2: add dma_resv_assert_help() calls
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Link: https://patchwork.freedesktop.org/patch/391596/?series=81973&rev=1
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/ttm/ttm_bo_api.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index da837d22f78e..2ff4fdada333 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -153,6 +153,7 @@ struct ttm_buffer_object { struct dma_fence *moving; unsigned priority; + unsigned pin_count; /** * Special members that are protected by the reserve lock @@ -607,6 +608,31 @@ static inline bool ttm_bo_uses_embedded_gem_object(struct ttm_buffer_object *bo) return bo->base.dev != NULL; } +/** + * ttm_bo_pin - Pin the buffer object. + * @bo: The buffer object to pin + * + * Make sure the buffer is not evicted any more during memory pressure. + */ +static inline void ttm_bo_pin(struct ttm_buffer_object *bo) +{ + dma_resv_assert_held(bo->base.resv); + ++bo->pin_count; +} + +/** + * ttm_bo_unpin - Unpin the buffer object. + * @bo: The buffer object to unpin + * + * Allows the buffer object to be evicted again during memory pressure. + */ +static inline void ttm_bo_unpin(struct ttm_buffer_object *bo) +{ + dma_resv_assert_held(bo->base.resv); + WARN_ON_ONCE(!bo->pin_count); + --bo->pin_count; +} + int ttm_mem_evict_first(struct ttm_bo_device *bdev, struct ttm_resource_manager *man, const struct ttm_place *place, |