26  * For DMA buffers the storage is sub-divided into so called blocks. Each block
37  * Blocks are exchanged between the DMA controller and the application via the
38  * means of two queues. The incoming queue and the outgoing queue. Blocks on the
46  *  * On the incoming list: Blocks on the incoming list are queued up to be
50  *  * On the outgoing list: Blocks on the outgoing list have been successfully
58  * In addition to this blocks are reference counted and the memory associated
64  * managing the blocks.
250  * @queue: Queue for which to complete blocks.
251  * @list: List of aborted blocks. All blocks in this list must be from @queue.
255  * hand the blocks back to the queue.
351 		for (i = 0; i < ARRAY_SIZE(queue->fileio.blocks); i++) {  in iio_dma_buffer_request_update()
352 			block = queue->fileio.blocks[i];  in iio_dma_buffer_request_update()
360 		 * At this point all blocks are either owned by the core or  in iio_dma_buffer_request_update()
368 	for (i = 0; i < ARRAY_SIZE(queue->fileio.blocks); i++) {  in iio_dma_buffer_request_update()
369 		if (queue->fileio.blocks[i]) {  in iio_dma_buffer_request_update()
370 			block = queue->fileio.blocks[i];  in iio_dma_buffer_request_update()
387 			queue->fileio.blocks[i] = block;  in iio_dma_buffer_request_update()
419 		for (i = 0; i < ARRAY_SIZE(queue->fileio.blocks); i++) {  in iio_dma_buffer_fileio_free()
420 			if (!queue->fileio.blocks[i])  in iio_dma_buffer_fileio_free()
422 			queue->fileio.blocks[i]->state = IIO_BLOCK_STATE_DEAD;  in iio_dma_buffer_fileio_free()
428 	for (i = 0; i < ARRAY_SIZE(queue->fileio.blocks); i++) {  in iio_dma_buffer_fileio_free()
429 		if (!queue->fileio.blocks[i])  in iio_dma_buffer_fileio_free()
431 		iio_buffer_block_put(queue->fileio.blocks[i]);  in iio_dma_buffer_fileio_free()
432 		queue->fileio.blocks[i] = NULL;  in iio_dma_buffer_fileio_free()
542 	block = queue->fileio.blocks[idx];  in iio_dma_buffer_dequeue()
547 	idx = (idx + 1) % ARRAY_SIZE(queue->fileio.blocks);  in iio_dma_buffer_dequeue()
651 	 * but won't increase since all blocks are in use.  in iio_dma_buffer_usage()
660 	for (i = 0; i < ARRAY_SIZE(queue->fileio.blocks); i++) {  in iio_dma_buffer_usage()
661 		block = queue->fileio.blocks[i];  in iio_dma_buffer_usage()
681 	 * If the buffer is enabled and in fileio mode new blocks can't be  in iio_dma_buffer_attach_dmabuf()