firewire: optimize iso queueing by setting wake only after the last packet
[linux-2.6.git] / sound / firewire / packets-buffer.h
1 #ifndef SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED
2 #define SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED
3
4 #include <linux/dma-mapping.h>
5 #include <linux/firewire.h>
6
7 /**
8  * struct iso_packets_buffer - manages a buffer for many packets
9  * @iso_buffer: the memory containing the packets
10  * @packets: an array, with each element pointing to one packet
11  */
12 struct iso_packets_buffer {
13         struct fw_iso_buffer iso_buffer;
14         struct {
15                 void *buffer;
16                 unsigned int offset;
17         } *packets;
18 };
19
20 int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit,
21                             unsigned int count, unsigned int packet_size,
22                             enum dma_data_direction direction);
23 void iso_packets_buffer_destroy(struct iso_packets_buffer *b,
24                                 struct fw_unit *unit);
25
26 #endif