112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
|
/* 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"
|
||
|
|
#include "virtio_pcm.h"
|
||
|
|
|
||
|
|
#define VIRTIO_SND_CARD_DRIVER "virtio-snd"
|
||
|
|
#define VIRTIO_SND_CARD_NAME "VirtIO SoundCard"
|
||
|
|
#define VIRTIO_SND_PCM_NAME "VirtIO PCM"
|
||
|
|
|
||
|
|
struct virtio_jack;
|
||
|
|
struct virtio_pcm_substream;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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.
|
||
|
|
* @pcm_list: VirtIO PCM device list.
|
||
|
|
* @jacks: VirtIO jacks.
|
||
|
|
* @njacks: Number of jacks.
|
||
|
|
* @substreams: VirtIO PCM substreams.
|
||
|
|
* @nsubstreams: Number of PCM substreams.
|
||
|
|
* @chmaps: VirtIO channel maps.
|
||
|
|
* @nchmaps: Number of channel maps.
|
||
|
|
*/
|
||
|
|
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;
|
||
|
|
struct list_head pcm_list;
|
||
|
|
struct virtio_jack *jacks;
|
||
|
|
u32 njacks;
|
||
|
|
struct virtio_pcm_substream *substreams;
|
||
|
|
u32 nsubstreams;
|
||
|
|
struct virtio_snd_chmap_info *chmaps;
|
||
|
|
u32 nchmaps;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* 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];
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline struct virtio_snd_queue *
|
||
|
|
virtsnd_pcm_queue(struct virtio_pcm_substream *vss)
|
||
|
|
{
|
||
|
|
if (vss->direction == SNDRV_PCM_STREAM_PLAYBACK)
|
||
|
|
return virtsnd_tx_queue(vss->snd);
|
||
|
|
else
|
||
|
|
return virtsnd_rx_queue(vss->snd);
|
||
|
|
}
|
||
|
|
|
||
|
|
int virtsnd_jack_parse_cfg(struct virtio_snd *snd);
|
||
|
|
|
||
|
|
int virtsnd_jack_build_devs(struct virtio_snd *snd);
|
||
|
|
|
||
|
|
void virtsnd_jack_event(struct virtio_snd *snd,
|
||
|
|
struct virtio_snd_event *event);
|
||
|
|
|
||
|
|
int virtsnd_chmap_parse_cfg(struct virtio_snd *snd);
|
||
|
|
|
||
|
|
int virtsnd_chmap_build_devs(struct virtio_snd *snd);
|
||
|
|
|
||
|
|
#endif /* VIRTIO_SND_CARD_H */
|