sound/firewire/packets-buffer.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   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