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Commit c3ea576e authored by Christian König's avatar Christian König Committed by Alex Deucher
Browse files

drm/ttm: add optional LRU removal callback v2 



Useful for driver specific LRU handling.

v2: fix typo in comment

Reviewed-by: default avatarSinclair Yeh <syeh@vmware.com>
Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 00cfd664

drivers/gpu/drm/ttm/ttm_bo.c

+7 −5
Original line number Diff line number Diff line
@@ -186,8 +186,12 @@ EXPORT_SYMBOL(ttm_bo_add_to_lru); 


int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)

{

	struct ttm_bo_device *bdev = bo->bdev;

	int put_count = 0;



	if (bdev->driver->lru_removal)

		bdev->driver->lru_removal(bo);



	if (!list_empty(&bo->swap)) {

		list_del_init(&bo->swap);

		++put_count;
@@ -197,11 +201,6 @@ int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) 
		++put_count;

	}



	/*

	 * TODO: Add a driver hook to delete from

	 * driver-specific LRU's here.

	 */



	return put_count;

}
@@ -235,6 +234,9 @@ void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo) 


	lockdep_assert_held(&bo->resv->lock.base);



	if (bdev->driver->lru_removal)

		bdev->driver->lru_removal(bo);



	if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {

		list_del_init(&bo->swap);

		list_del_init(&bo->lru);

include/drm/ttm/ttm_bo_driver.h

+6 −0
Original line number Diff line number Diff line
@@ -434,6 +434,12 @@ struct ttm_bo_driver { 
	 */

	int (*io_mem_reserve)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);

	void (*io_mem_free)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);



	/**

	 * Optional driver callback for when BO is removed from the LRU.

	 * Called with LRU lock held immediately before the removal.

	 */

	void (*lru_removal)(struct ttm_buffer_object *bo);

};



/**