linux/iio/buffer_impl.h

13  * INDIO_BUFFER_FLAG_FIXED_WATERMARK - Watermark level of the buffer can not be
14  *   configured. It has a fixed value which will be buffer specific.
20  * @store_to:		actually store stuff to the buffer
23  *			the buffer.
27  * @set_length:		set number of datums in buffer
28  * @enable:             called if the buffer is attached to a device and the
31  * @disable:            called if the buffer is attached to a device and the
33  * @release:		called when the last reference to the buffer is dropped,
34  *			should free all resources allocated by the buffer.
35  * @modes:		Supported operating modes by this buffer type
38  * The purpose of this structure is to make the buffer element
40  * different buffer designs (space efficiency vs speed for example).
42  * It is worth noting that a given buffer implementation may only support a
47 	int (*store_to)(struct iio_buffer *buffer, const void *data);
48 	int (*read)(struct iio_buffer *buffer, size_t n, char __user *buf);
49 	size_t (*data_available)(struct iio_buffer *buffer);
51 	int (*request_update)(struct iio_buffer *buffer);
53 	int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd);
54 	int (*set_length)(struct iio_buffer *buffer, unsigned int length);
56 	int (*enable)(struct iio_buffer *buffer, struct iio_dev *indio_dev);
57 	int (*disable)(struct iio_buffer *buffer, struct iio_dev *indio_dev);
59 	void (*release)(struct iio_buffer *buffer);
66  * struct iio_buffer - general buffer structure
69  * those writing new buffer implementations.
72 	/** @length: Number of datums in buffer. */
79 	 * @access: Buffer access functions associated with the
90 	/** @pollq: Wait queue to allow for polling on the buffer. */
103 	/* @buffer_group: Attributes of the buffer group. */
112 	/* @attrs: Standard attributes of the buffer. */
115 	/* @demux_bounce: Buffer for doing gather from incoming scan. */
121 	/* @ref: Reference count of the buffer. */
126  * iio_update_buffers() - add or remove buffer from active list
127  * @indio_dev:		device to add buffer to
128  * @insert_buffer:	buffer to insert
138  * iio_buffer_init() - Initialize the buffer structure
139  * @buffer:		buffer to be initialized
141 void iio_buffer_init(struct iio_buffer *buffer);
143 struct iio_buffer *iio_buffer_get(struct iio_buffer *buffer);
144 void iio_buffer_put(struct iio_buffer *buffer);
148 static inline void iio_buffer_get(struct iio_buffer *buffer) {}  in iio_buffer_get()  argument
149 static inline void iio_buffer_put(struct iio_buffer *buffer) {}  in iio_buffer_put()  argument