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: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 3ea9a01..4cbf265 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -228,6 +228,27 @@
}
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.
*/