Commit | Line | Data |
---|---|---|
31ef9134 CL |
1 | #ifndef SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED |
2 | #define SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED | |
3 | ||
4 | #include <linux/mutex.h> | |
5 | #include <linux/types.h> | |
6 | ||
7 | struct fw_unit; | |
8 | ||
9 | /** | |
10 | * struct fw_iso_resources - manages channel/bandwidth allocation | |
11 | * @channels_mask: if the device does not support all channel numbers, set this | |
12 | * bit mask to something else than the default (all ones) | |
13 | * | |
14 | * This structure manages (de)allocation of isochronous resources (channel and | |
15 | * bandwidth) for one isochronous stream. | |
16 | */ | |
17 | struct fw_iso_resources { | |
18 | u64 channels_mask; | |
19 | /* private: */ | |
20 | struct fw_unit *unit; | |
21 | struct mutex mutex; | |
22 | unsigned int channel; | |
23 | unsigned int bandwidth; /* in bandwidth units, without overhead */ | |
24 | unsigned int bandwidth_overhead; | |
25 | int generation; /* in which allocation is valid */ | |
26 | bool allocated; | |
31ef9134 CL |
27 | }; |
28 | ||
5b2599a0 CL |
29 | int fw_iso_resources_init(struct fw_iso_resources *r, |
30 | struct fw_unit *unit); | |
31ef9134 CL |
31 | void fw_iso_resources_destroy(struct fw_iso_resources *r); |
32 | ||
33 | int fw_iso_resources_allocate(struct fw_iso_resources *r, | |
34 | unsigned int max_payload_bytes, int speed); | |
35 | int fw_iso_resources_update(struct fw_iso_resources *r); | |
36 | void fw_iso_resources_free(struct fw_iso_resources *r); | |
37 | ||
38 | #endif |