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