1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED
3 #define SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED
5 #include <linux/mutex.h>
6 #include <linux/types.h>
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)
15 * This structure manages (de)allocation of isochronous resources (channel and
16 * bandwidth) for one isochronous stream.
18 struct fw_iso_resources {
24 unsigned int bandwidth; /* in bandwidth units, without overhead */
25 unsigned int bandwidth_overhead;
26 int generation; /* in which allocation is valid */
30 int fw_iso_resources_init(struct fw_iso_resources *r,
31 struct fw_unit *unit);
32 void fw_iso_resources_destroy(struct fw_iso_resources *r);
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);