17 #include <linux/iio/buffer.h>
19 #include <linux/iio/buffer-dma.h>
20 #include <linux/iio/buffer-dmaengine.h>
23  * The IIO DMAengine buffer combines the generic IIO DMA buffer infrastructure
24  * with the DMAengine framework. The generic IIO DMA buffer infrastructure is
25  * used to manage the buffer memory and implement the IIO buffer operations
27  * this results in a device independent fully functional DMA buffer
43 		struct iio_buffer *buffer)  in iio_buffer_to_dmaengine_buffer()  argument
45 	return container_of(buffer, struct dmaengine_buffer, queue.buffer);  in iio_buffer_to_dmaengine_buffer()
65 		iio_buffer_to_dmaengine_buffer(&queue->buffer);  in iio_dmaengine_buffer_submit_block()
98 		iio_buffer_to_dmaengine_buffer(&queue->buffer);  in iio_dmaengine_buffer_abort()
137 		iio_buffer_to_dmaengine_buffer(indio_dev->buffer);  in iio_dmaengine_buffer_get_length_align()
151  * iio_dmaengine_buffer_alloc() - Allocate new buffer which uses DMAengine
152  * @dev: Parent device for the buffer
155  * This allocates a new IIO buffer which internally uses the DMAengine framework
159  * Once done using the buffer iio_dmaengine_buffer_free() should be used to
203 	iio_buffer_set_attrs(&dmaengine_buffer->queue.buffer,  in iio_dmaengine_buffer_alloc()
206 	dmaengine_buffer->queue.buffer.access = &iio_dmaengine_buffer_ops;  in iio_dmaengine_buffer_alloc()
208 	return &dmaengine_buffer->queue.buffer;  in iio_dmaengine_buffer_alloc()
216  * iio_dmaengine_buffer_free() - Free dmaengine buffer
217  * @buffer: Buffer to free
219  * Frees a buffer previously allocated with iio_dmaengine_buffer_alloc().
221 static void iio_dmaengine_buffer_free(struct iio_buffer *buffer)  in iio_dmaengine_buffer_free()  argument
224 		iio_buffer_to_dmaengine_buffer(buffer);  in iio_dmaengine_buffer_free()
229 	iio_buffer_put(buffer);  in iio_dmaengine_buffer_free()
239  * @dev: Parent device for the buffer
242  * This allocates a new IIO buffer which internally uses the DMAengine framework
246  * The buffer will be automatically de-allocated once the device gets destroyed.
251 	struct iio_buffer **bufferp, *buffer;  in devm_iio_dmaengine_buffer_alloc()  local
258 	buffer = iio_dmaengine_buffer_alloc(dev, channel);  in devm_iio_dmaengine_buffer_alloc()
259 	if (IS_ERR(buffer)) {  in devm_iio_dmaengine_buffer_alloc()
261 		return buffer;  in devm_iio_dmaengine_buffer_alloc()
264 	*bufferp = buffer;  in devm_iio_dmaengine_buffer_alloc()
267 	return buffer;  in devm_iio_dmaengine_buffer_alloc()
272 MODULE_DESCRIPTION("DMA buffer for the IIO framework");