From: Christian König christian.koenig@amd.com
This allows the drivers to move a BO to the end of the LRU without removing and adding it again.
Signed-off-by: Christian König christian.koenig@amd.com Reviewed-by: Chunming Zhou David1.Zhou@amd.com --- drivers/gpu/drm/ttm/ttm_bo.c | 20 ++++++++++++++++++++ include/drm/ttm/ttm_bo_api.h | 10 ++++++++++ 2 files changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 745e996..9e91cc3 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -228,6 +228,26 @@ void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo) } EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);
+void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo) +{ + struct ttm_bo_device *bdev = bo->bdev; + struct ttm_mem_type_manager *man; + + lockdep_assert_held(&bo->resv->lock.base); + + if (!list_empty(&bo->swap)) { + list_del(&bo->swap); + list_add_tail(&bo->swap, &bo->glob->swap_lru); + } + + if (!list_empty(&bo->lru)) { + man = &bdev->man[bo->mem.mem_type]; + list_del(&bo->lru); + list_add_tail(&bo->lru, &man->lru); + } +} +EXPORT_SYMBOL(ttm_bo_move_to_lru_tail); + /* * Call bo->mutex locked. */ diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index c768ddf..afae231 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -383,6 +383,16 @@ extern void ttm_bo_add_to_lru(struct ttm_buffer_object *bo); */ extern int ttm_bo_del_from_lru(struct ttm_buffer_object *bo);
+/** + * ttm_bo_move_to_lru_tail + * + * @bo: The buffer object. + * + * Move this BO to the tail of all lru lists used to lookup and reserve an + * object. This function must be called with struct ttm_bo_global::lru_lock + * held, and is used to make a BO less likely to be considered for eviction. + */ +extern void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo);
/** * ttm_bo_lock_delayed_workqueue