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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
31ef9134 CL |
2 | #ifndef SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED |
3 | #define SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED | |
4 | ||
5 | #include <linux/mutex.h> | |
6 | #include <linux/types.h> | |
7 | ||
8 | struct fw_unit; | |
9 | ||
10 | /** | |
11 | * struct fw_iso_resources - manages channel/bandwidth allocation | |
12 | * @channels_mask: if the device does not support all channel numbers, set this | |
13 | * bit mask to something else than the default (all ones) | |
14 | * | |
15 | * This structure manages (de)allocation of isochronous resources (channel and | |
16 | * bandwidth) for one isochronous stream. | |
17 | */ | |
18 | struct fw_iso_resources { | |
19 | u64 channels_mask; | |
20 | /* private: */ | |
21 | struct fw_unit *unit; | |
22 | struct mutex mutex; | |
23 | unsigned int channel; | |
24 | unsigned int bandwidth; /* in bandwidth units, without overhead */ | |
25 | unsigned int bandwidth_overhead; | |
26 | int generation; /* in which allocation is valid */ | |
27 | bool allocated; | |
31ef9134 CL |
28 | }; |
29 | ||
5b2599a0 CL |
30 | int fw_iso_resources_init(struct fw_iso_resources *r, |
31 | struct fw_unit *unit); | |
31ef9134 CL |
32 | void fw_iso_resources_destroy(struct fw_iso_resources *r); |
33 | ||
34 | int fw_iso_resources_allocate(struct fw_iso_resources *r, | |
35 | unsigned int max_payload_bytes, int speed); | |
36 | int fw_iso_resources_update(struct fw_iso_resources *r); | |
37 | void fw_iso_resources_free(struct fw_iso_resources *r); | |
38 | ||
39 | #endif |