| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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 |