1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
#ifndef SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED
#define SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED
#include <linux/mutex.h>
#include <linux/types.h>
struct fw_unit;
/**
* struct fw_iso_resources - manages channel/bandwidth allocation
* @channels_mask: if the device does not support all channel numbers, set this
* bit mask to something else than the default (all ones)
*
* This structure manages (de)allocation of isochronous resources (channel and
* bandwidth) for one isochronous stream.
*/
struct fw_iso_resources {
u64 channels_mask;
/* private: */
struct fw_unit *unit;
struct mutex mutex;
unsigned int channel;
unsigned int bandwidth; /* in bandwidth units, without overhead */
unsigned int bandwidth_overhead;
int generation; /* in which allocation is valid */
bool allocated;
};
int fw_iso_resources_init(struct fw_iso_resources *r,
struct fw_unit *unit);
void fw_iso_resources_destroy(struct fw_iso_resources *r);
int fw_iso_resources_allocate(struct fw_iso_resources *r,
unsigned int max_payload_bytes, int speed);
int fw_iso_resources_update(struct fw_iso_resources *r);
void fw_iso_resources_free(struct fw_iso_resources *r);
#endif
|
