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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; |
27 | }; |
28 | |
29 | int fw_iso_resources_init(struct fw_iso_resources *r, |
30 | struct fw_unit *unit); |
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 |
39 |
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od-2011-09-04
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v2.6.34-rc5
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