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()
135 	struct iio_buffer *buffer = to_iio_dev_attr(attr)->buffer;  in iio_dmaengine_buffer_get_length_align()  local
137 		iio_buffer_to_dmaengine_buffer(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
204 	dmaengine_buffer->queue.buffer.attrs = iio_dmaengine_buffer_attrs;  in iio_dmaengine_buffer_alloc()
205 	dmaengine_buffer->queue.buffer.access = &iio_dmaengine_buffer_ops;  in iio_dmaengine_buffer_alloc()
207 	return &dmaengine_buffer->queue.buffer;  in iio_dmaengine_buffer_alloc()
215  * iio_dmaengine_buffer_free() - Free dmaengine buffer
216  * @buffer: Buffer to free
218  * Frees a buffer previously allocated with iio_dmaengine_buffer_alloc().
220 static void iio_dmaengine_buffer_free(struct iio_buffer *buffer)  in iio_dmaengine_buffer_free()  argument
223 		iio_buffer_to_dmaengine_buffer(buffer);  in iio_dmaengine_buffer_free()
228 	iio_buffer_put(buffer);  in iio_dmaengine_buffer_free()
231 static void __devm_iio_dmaengine_buffer_free(void *buffer)  in __devm_iio_dmaengine_buffer_free()  argument
233 	iio_dmaengine_buffer_free(buffer);  in __devm_iio_dmaengine_buffer_free()
238  * @dev: Parent device for the buffer
241  * This allocates a new IIO buffer which internally uses the DMAengine framework
245  * The buffer will be automatically de-allocated once the device gets destroyed.
250 	struct iio_buffer *buffer;  in devm_iio_dmaengine_buffer_alloc()  local
253 	buffer = iio_dmaengine_buffer_alloc(dev, channel);  in devm_iio_dmaengine_buffer_alloc()
254 	if (IS_ERR(buffer))  in devm_iio_dmaengine_buffer_alloc()
255 		return buffer;  in devm_iio_dmaengine_buffer_alloc()
258 				       buffer);  in devm_iio_dmaengine_buffer_alloc()
262 	return buffer;  in devm_iio_dmaengine_buffer_alloc()
266  * devm_iio_dmaengine_buffer_setup() - Setup a DMA buffer for an IIO device
267  * @dev: Parent device for the buffer
268  * @indio_dev: IIO device to which to attach this buffer.
271  * This allocates a new IIO buffer with devm_iio_dmaengine_buffer_alloc()
280 	struct iio_buffer *buffer;  in devm_iio_dmaengine_buffer_setup()  local
282 	buffer = devm_iio_dmaengine_buffer_alloc(indio_dev->dev.parent,  in devm_iio_dmaengine_buffer_setup()
284 	if (IS_ERR(buffer))  in devm_iio_dmaengine_buffer_setup()
285 		return PTR_ERR(buffer);  in devm_iio_dmaengine_buffer_setup()
289 	return iio_device_attach_buffer(indio_dev, buffer);  in devm_iio_dmaengine_buffer_setup()
294 MODULE_DESCRIPTION("DMA buffer for the IIO framework");