cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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virtio_card.h (2781B)

      1/* SPDX-License-Identifier: GPL-2.0+ */
      2/*
      3 * virtio-snd: Virtio sound device
      4 * Copyright (C) 2021 OpenSynergy GmbH
      5 */
      6#ifndef VIRTIO_SND_CARD_H
      7#define VIRTIO_SND_CARD_H
      8
      9#include <linux/slab.h>
     10#include <linux/virtio.h>
     11#include <sound/core.h>
     12#include <uapi/linux/virtio_snd.h>
     13
     14#include "virtio_ctl_msg.h"
     15#include "virtio_pcm.h"
     16
     17#define VIRTIO_SND_CARD_DRIVER	"virtio-snd"
     18#define VIRTIO_SND_CARD_NAME	"VirtIO SoundCard"
     19#define VIRTIO_SND_PCM_NAME	"VirtIO PCM"
     20
     21struct virtio_jack;
     22struct virtio_pcm_substream;
     23
     24/**
     25 * struct virtio_snd_queue - Virtqueue wrapper structure.
     26 * @lock: Used to synchronize access to a virtqueue.
     27 * @vqueue: Underlying virtqueue.
     28 */
     29struct virtio_snd_queue {
     30	spinlock_t lock;
     31	struct virtqueue *vqueue;
     32};
     33
     34/**
     35 * struct virtio_snd - VirtIO sound card device.
     36 * @vdev: Underlying virtio device.
     37 * @queues: Virtqueue wrappers.
     38 * @card: ALSA sound card.
     39 * @ctl_msgs: Pending control request list.
     40 * @event_msgs: Device events.
     41 * @pcm_list: VirtIO PCM device list.
     42 * @jacks: VirtIO jacks.
     43 * @njacks: Number of jacks.
     44 * @substreams: VirtIO PCM substreams.
     45 * @nsubstreams: Number of PCM substreams.
     46 * @chmaps: VirtIO channel maps.
     47 * @nchmaps: Number of channel maps.
     48 */
     49struct virtio_snd {
     50	struct virtio_device *vdev;
     51	struct virtio_snd_queue queues[VIRTIO_SND_VQ_MAX];
     52	struct snd_card *card;
     53	struct list_head ctl_msgs;
     54	struct virtio_snd_event *event_msgs;
     55	struct list_head pcm_list;
     56	struct virtio_jack *jacks;
     57	u32 njacks;
     58	struct virtio_pcm_substream *substreams;
     59	u32 nsubstreams;
     60	struct virtio_snd_chmap_info *chmaps;
     61	u32 nchmaps;
     62};
     63
     64/* Message completion timeout in milliseconds (module parameter). */
     65extern u32 virtsnd_msg_timeout_ms;
     66
     67static inline struct virtio_snd_queue *
     68virtsnd_control_queue(struct virtio_snd *snd)
     69{
     70	return &snd->queues[VIRTIO_SND_VQ_CONTROL];
     71}
     72
     73static inline struct virtio_snd_queue *
     74virtsnd_event_queue(struct virtio_snd *snd)
     75{
     76	return &snd->queues[VIRTIO_SND_VQ_EVENT];
     77}
     78
     79static inline struct virtio_snd_queue *
     80virtsnd_tx_queue(struct virtio_snd *snd)
     81{
     82	return &snd->queues[VIRTIO_SND_VQ_TX];
     83}
     84
     85static inline struct virtio_snd_queue *
     86virtsnd_rx_queue(struct virtio_snd *snd)
     87{
     88	return &snd->queues[VIRTIO_SND_VQ_RX];
     89}
     90
     91static inline struct virtio_snd_queue *
     92virtsnd_pcm_queue(struct virtio_pcm_substream *vss)
     93{
     94	if (vss->direction == SNDRV_PCM_STREAM_PLAYBACK)
     95		return virtsnd_tx_queue(vss->snd);
     96	else
     97		return virtsnd_rx_queue(vss->snd);
     98}
     99
    100int virtsnd_jack_parse_cfg(struct virtio_snd *snd);
    101
    102int virtsnd_jack_build_devs(struct virtio_snd *snd);
    103
    104void virtsnd_jack_event(struct virtio_snd *snd,
    105			struct virtio_snd_event *event);
    106
    107int virtsnd_chmap_parse_cfg(struct virtio_snd *snd);
    108
    109int virtsnd_chmap_build_devs(struct virtio_snd *snd);
    110
    111#endif /* VIRTIO_SND_CARD_H */