drivers/dma-buf/dma-resv.c

366 /* Restart the unlocked iteration by initializing the cursor object. */
367 static void dma_resv_iter_restart_unlocked(struct dma_resv_iter *cursor)
369 	cursor->index = 0;
370 	cursor->num_fences = 0;
371 	cursor->fences = dma_resv_fences_list(cursor->obj);
372 	if (cursor->fences)
373 		cursor->num_fences = cursor->fences->num_fences;
374 	cursor->is_restarted = true;
378 static void dma_resv_iter_walk_unlocked(struct dma_resv_iter *cursor)
380 	if (!cursor->fences)
385 		dma_fence_put(cursor->fence);
387 		if (cursor->index >= cursor->num_fences) {
388 			cursor->fence = NULL;
393 		dma_resv_list_entry(cursor->fences, cursor->index++,
394 				    cursor->obj, &cursor->fence,
395 				    &cursor->fence_usage);
396 		cursor->fence = dma_fence_get_rcu(cursor->fence);
397 		if (!cursor->fence) {
398 			dma_resv_iter_restart_unlocked(cursor);
402 		if (!dma_fence_is_signaled(cursor->fence) &&
403 		    cursor->usage >= cursor->fence_usage)
410  * @cursor: the cursor with the current position
420 struct dma_fence *dma_resv_iter_first_unlocked(struct dma_resv_iter *cursor)
424 		dma_resv_iter_restart_unlocked(cursor);
425 		dma_resv_iter_walk_unlocked(cursor);
426 	} while (dma_resv_fences_list(cursor->obj) != cursor->fences);
429 	return cursor->fence;
435  * @cursor: the cursor with the current position
443 struct dma_fence *dma_resv_iter_next_unlocked(struct dma_resv_iter *cursor)
448 	cursor->is_restarted = false;
449 	restart = dma_resv_fences_list(cursor->obj) != cursor->fences;
452 			dma_resv_iter_restart_unlocked(cursor);
453 		dma_resv_iter_walk_unlocked(cursor);
455 	} while (dma_resv_fences_list(cursor->obj) != cursor->fences);
458 	return cursor->fence;
464  * @cursor: cursor to record the current position
471 struct dma_fence *dma_resv_iter_first(struct dma_resv_iter *cursor)
475 	dma_resv_assert_held(cursor->obj);
477 	cursor->index = 0;
478 	cursor->fences = dma_resv_fences_list(cursor->obj);
480 	fence = dma_resv_iter_next(cursor);
481 	cursor->is_restarted = true;
488  * @cursor: cursor to record the current position
493 struct dma_fence *dma_resv_iter_next(struct dma_resv_iter *cursor)
497 	dma_resv_assert_held(cursor->obj);
499 	cursor->is_restarted = false;
502 		if (!cursor->fences ||
503 		    cursor->index >= cursor->fences->num_fences)
506 		dma_resv_list_entry(cursor->fences, cursor->index++,
507 				    cursor->obj, &fence, &cursor->fence_usage);
508 	} while (cursor->fence_usage > cursor->usage);
523 	struct dma_resv_iter cursor;
531 	dma_resv_iter_begin(&cursor, src, DMA_RESV_USAGE_BOOKKEEP);
532 	dma_resv_for_each_fence_unlocked(&cursor, f) {
534 		if (dma_resv_iter_is_restarted(&cursor)) {
537 			list = dma_resv_list_alloc(cursor.num_fences);
539 				dma_resv_iter_end(&cursor);
547 				  dma_resv_iter_usage(&cursor));
549 	dma_resv_iter_end(&cursor);
572 	struct dma_resv_iter cursor;
578 	dma_resv_iter_begin(&cursor, obj, usage);
579 	dma_resv_for_each_fence_unlocked(&cursor, fence) {
581 		if (dma_resv_iter_is_restarted(&cursor)) {
588 			count = cursor.num_fences + 1;
598 				dma_resv_iter_end(&cursor);
606 	dma_resv_iter_end(&cursor);
682 	struct dma_resv_iter cursor;
685 	dma_resv_iter_begin(&cursor, obj, usage);
686 	dma_resv_for_each_fence_unlocked(&cursor, fence) {
696 	dma_resv_iter_end(&cursor);
714 	struct dma_resv_iter cursor;
717 	dma_resv_iter_begin(&cursor, obj, usage);
718 	dma_resv_for_each_fence_unlocked(&cursor, fence) {
721 	dma_resv_iter_end(&cursor);
740 	struct dma_resv_iter cursor;
743 	dma_resv_iter_begin(&cursor, obj, usage);
744 	dma_resv_for_each_fence_unlocked(&cursor, fence) {
745 		dma_resv_iter_end(&cursor);
748 	dma_resv_iter_end(&cursor);
764 	struct dma_resv_iter cursor;
767 	dma_resv_for_each_fence(&cursor, obj, DMA_RESV_USAGE_READ, fence) {
769 			   usage[dma_resv_iter_usage(&cursor)]);