[mirror_ubuntu-kernels.git] / sound / firewire / packets-buffer.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED
#define SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED

#include <linux/dma-mapping.h>
#include <linux/firewire.h>

/**
 * struct iso_packets_buffer - manages a buffer for many packets
 * @iso_buffer: the memory containing the packets
 * @packets: an array, with each element pointing to one packet
 */
struct iso_packets_buffer {
	struct fw_iso_buffer iso_buffer;
	struct {
		void *buffer;
		unsigned int offset;
	} *packets;
};

int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit,
			    unsigned int count, unsigned int packet_size,
			    enum dma_data_direction direction);
void iso_packets_buffer_destroy(struct iso_packets_buffer *b,
				struct fw_unit *unit);

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
31ef9134 CL	2	#ifndef SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED
	3	#define SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED
	4
	5	#include <linux/dma-mapping.h>
	6	#include <linux/firewire.h>
	7
	8	/**
	9	* struct iso_packets_buffer - manages a buffer for many packets
	10	* @iso_buffer: the memory containing the packets
	11	* @packets: an array, with each element pointing to one packet
	12	*/
	13	struct iso_packets_buffer {
	14	struct fw_iso_buffer iso_buffer;
	15	struct {
	16	void *buffer;
	17	unsigned int offset;
	18	} *packets;
	19	};
	20
	21	int iso_packets_buffer_init(struct iso_packets_buffer b, struct fw_unit unit,
	22	unsigned int count, unsigned int packet_size,
	23	enum dma_data_direction direction);
	24	void iso_packets_buffer_destroy(struct iso_packets_buffer *b,
	25	struct fw_unit *unit);
	26
	27	#endif