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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* virtio-snd: Virtio sound device
* Copyright (C) 2021 OpenSynergy GmbH
*/
#ifndef VIRTIO_SND_CARD_H
#define VIRTIO_SND_CARD_H
#include <linux/slab.h>
#include <linux/virtio.h>
#include <sound/core.h>
#include <uapi/linux/virtio_snd.h>
#include "virtio_ctl_msg.h"
#define VIRTIO_SND_CARD_DRIVER "virtio-snd"
#define VIRTIO_SND_CARD_NAME "VirtIO SoundCard"
/**
* struct virtio_snd_queue - Virtqueue wrapper structure.
* @lock: Used to synchronize access to a virtqueue.
* @vqueue: Underlying virtqueue.
*/
struct virtio_snd_queue {
spinlock_t lock;
struct virtqueue *vqueue;
};
/**
* struct virtio_snd - VirtIO sound card device.
* @vdev: Underlying virtio device.
* @queues: Virtqueue wrappers.
* @card: ALSA sound card.
* @ctl_msgs: Pending control request list.
* @event_msgs: Device events.
*/
struct virtio_snd {
struct virtio_device *vdev;
struct virtio_snd_queue queues[VIRTIO_SND_VQ_MAX];
struct snd_card *card;
struct list_head ctl_msgs;
struct virtio_snd_event *event_msgs;
};
/* Message completion timeout in milliseconds (module parameter). */
extern u32 virtsnd_msg_timeout_ms;
static inline struct virtio_snd_queue *
virtsnd_control_queue(struct virtio_snd *snd)
{
return &snd->queues[VIRTIO_SND_VQ_CONTROL];
}
static inline struct virtio_snd_queue *
virtsnd_event_queue(struct virtio_snd *snd)
{
return &snd->queues[VIRTIO_SND_VQ_EVENT];
}
static inline struct virtio_snd_queue *
virtsnd_tx_queue(struct virtio_snd *snd)
{
return &snd->queues[VIRTIO_SND_VQ_TX];
}
static inline struct virtio_snd_queue *
virtsnd_rx_queue(struct virtio_snd *snd)
{
return &snd->queues[VIRTIO_SND_VQ_RX];
}
#endif /* VIRTIO_SND_CARD_H */
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