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Commit ab749618 authored by Christian König's avatar Christian König Committed by Alex Deucher
Browse files

drm/ttm: add ttm_bo_move_to_lru_tail function v2 



This allows the drivers to move a BO to the end of the LRU
without removing and adding it again.

v2: Make it more robust, handle pinned and swapable BOs as well.

Reviewed-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ed704a43

drivers/gpu/drm/ttm/ttm_bo.c

+21 −0
Original line number Diff line number Diff line
@@ -228,6 +228,27 @@ 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 (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {

		list_del_init(&bo->swap);

		list_del_init(&bo->lru);



	} else {

		if (bo->ttm && !(bo->ttm->page_flags & TTM_PAGE_FLAG_SG))

			list_move_tail(&bo->swap, &bo->glob->swap_lru);



		man = &bdev->man[bo->mem.mem_type];

		list_move_tail(&bo->lru, &man->lru);

	}

}

EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);



/*

 * Call bo->mutex locked.

 */

include/drm/ttm/ttm_bo_api.h

+10 −0
Original line number Diff line number Diff line
@@ -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