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39 lines
1.2 KiB
39 lines
1.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED |
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#define SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED |
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#include <linux/mutex.h> |
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#include <linux/types.h> |
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struct fw_unit; |
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/** |
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* struct fw_iso_resources - manages channel/bandwidth allocation |
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* @channels_mask: if the device does not support all channel numbers, set this |
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* bit mask to something else than the default (all ones) |
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* |
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* This structure manages (de)allocation of isochronous resources (channel and |
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* bandwidth) for one isochronous stream. |
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*/ |
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struct fw_iso_resources { |
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u64 channels_mask; |
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/* private: */ |
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struct fw_unit *unit; |
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struct mutex mutex; |
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unsigned int channel; |
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unsigned int bandwidth; /* in bandwidth units, without overhead */ |
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unsigned int bandwidth_overhead; |
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int generation; /* in which allocation is valid */ |
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bool allocated; |
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}; |
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int fw_iso_resources_init(struct fw_iso_resources *r, |
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struct fw_unit *unit); |
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void fw_iso_resources_destroy(struct fw_iso_resources *r); |
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int fw_iso_resources_allocate(struct fw_iso_resources *r, |
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unsigned int max_payload_bytes, int speed); |
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int fw_iso_resources_update(struct fw_iso_resources *r); |
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void fw_iso_resources_free(struct fw_iso_resources *r); |
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#endif
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