66 строки
1.5 KiB
C
66 строки
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* virtio-snd: Virtio sound device
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* Copyright (C) 2021 OpenSynergy GmbH
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*/
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#ifndef VIRTIO_SND_CARD_H
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#define VIRTIO_SND_CARD_H
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#include <linux/slab.h>
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#include <linux/virtio.h>
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#include <sound/core.h>
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#include <uapi/linux/virtio_snd.h>
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#define VIRTIO_SND_CARD_DRIVER "virtio-snd"
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#define VIRTIO_SND_CARD_NAME "VirtIO SoundCard"
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/**
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* struct virtio_snd_queue - Virtqueue wrapper structure.
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* @lock: Used to synchronize access to a virtqueue.
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* @vqueue: Underlying virtqueue.
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*/
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struct virtio_snd_queue {
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spinlock_t lock;
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struct virtqueue *vqueue;
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};
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/**
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* struct virtio_snd - VirtIO sound card device.
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* @vdev: Underlying virtio device.
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* @queues: Virtqueue wrappers.
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* @card: ALSA sound card.
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* @event_msgs: Device events.
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*/
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struct virtio_snd {
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struct virtio_device *vdev;
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struct virtio_snd_queue queues[VIRTIO_SND_VQ_MAX];
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struct snd_card *card;
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struct virtio_snd_event *event_msgs;
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};
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static inline struct virtio_snd_queue *
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virtsnd_control_queue(struct virtio_snd *snd)
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{
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return &snd->queues[VIRTIO_SND_VQ_CONTROL];
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}
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static inline struct virtio_snd_queue *
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virtsnd_event_queue(struct virtio_snd *snd)
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{
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return &snd->queues[VIRTIO_SND_VQ_EVENT];
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}
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static inline struct virtio_snd_queue *
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virtsnd_tx_queue(struct virtio_snd *snd)
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{
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return &snd->queues[VIRTIO_SND_VQ_TX];
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}
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static inline struct virtio_snd_queue *
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virtsnd_rx_queue(struct virtio_snd *snd)
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{
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return &snd->queues[VIRTIO_SND_VQ_RX];
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}
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#endif /* VIRTIO_SND_CARD_H */
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