224 struct ttm_bo_driver {  struct
236 	struct ttm_tt *(*ttm_tt_create)(struct ttm_buffer_object *bo,
261 	 * struct ttm_bo_driver member invalidate_caches  argument
277 	 * struct ttm_bo_driver member eviction_valuable  argument
288 	 * struct ttm_bo_driver member evict_flags:  argument
301 	 * struct ttm_bo_driver member move:  argument
316 	 * struct ttm_bo_driver_member verify_access  argument
327 	int (*verify_access)(struct ttm_buffer_object *bo,
337 	void (*move_notify)(struct ttm_buffer_object *bo,
342 	int (*fault_reserve_notify)(struct ttm_buffer_object *bo);
347 	void (*swap_notify)(struct ttm_buffer_object *bo);
355 	int (*io_mem_reserve)(struct ttm_bo_device *bdev,
357 	void (*io_mem_free)(struct ttm_bo_device *bdev,
366 	unsigned long (*io_mem_pfn)(struct ttm_buffer_object *bo,
383 	int (*access_memory)(struct ttm_buffer_object *bo, unsigned long offset,