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de3a9980 AY |
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 | ||
9d45e514 | 14 | #include "virtio_ctl_msg.h" |
29b96bf5 | 15 | #include "virtio_pcm.h" |
9d45e514 | 16 | |
de3a9980 AY |
17 | #define VIRTIO_SND_CARD_DRIVER "virtio-snd" |
18 | #define VIRTIO_SND_CARD_NAME "VirtIO SoundCard" | |
29b96bf5 AY |
19 | #define VIRTIO_SND_PCM_NAME "VirtIO PCM" |
20 | ||
ca61a41f | 21 | struct virtio_jack; |
29b96bf5 | 22 | struct virtio_pcm_substream; |
de3a9980 AY |
23 | |
24 | /** | |
25 | * struct virtio_snd_queue - Virtqueue wrapper structure. | |
26 | * @lock: Used to synchronize access to a virtqueue. | |
27 | * @vqueue: Underlying virtqueue. | |
28 | */ | |
29 | struct 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. | |
9d45e514 | 39 | * @ctl_msgs: Pending control request list. |
de3a9980 | 40 | * @event_msgs: Device events. |
29b96bf5 | 41 | * @pcm_list: VirtIO PCM device list. |
ca61a41f AY |
42 | * @jacks: VirtIO jacks. |
43 | * @njacks: Number of jacks. | |
29b96bf5 AY |
44 | * @substreams: VirtIO PCM substreams. |
45 | * @nsubstreams: Number of PCM substreams. | |
19325fed AY |
46 | * @chmaps: VirtIO channel maps. |
47 | * @nchmaps: Number of channel maps. | |
de3a9980 AY |
48 | */ |
49 | struct virtio_snd { | |
50 | struct virtio_device *vdev; | |
51 | struct virtio_snd_queue queues[VIRTIO_SND_VQ_MAX]; | |
52 | struct snd_card *card; | |
9d45e514 | 53 | struct list_head ctl_msgs; |
de3a9980 | 54 | struct virtio_snd_event *event_msgs; |
29b96bf5 | 55 | struct list_head pcm_list; |
ca61a41f AY |
56 | struct virtio_jack *jacks; |
57 | u32 njacks; | |
29b96bf5 AY |
58 | struct virtio_pcm_substream *substreams; |
59 | u32 nsubstreams; | |
19325fed AY |
60 | struct virtio_snd_chmap_info *chmaps; |
61 | u32 nchmaps; | |
de3a9980 AY |
62 | }; |
63 | ||
9d45e514 AY |
64 | /* Message completion timeout in milliseconds (module parameter). */ |
65 | extern u32 virtsnd_msg_timeout_ms; | |
66 | ||
de3a9980 AY |
67 | static inline struct virtio_snd_queue * |
68 | virtsnd_control_queue(struct virtio_snd *snd) | |
69 | { | |
70 | return &snd->queues[VIRTIO_SND_VQ_CONTROL]; | |
71 | } | |
72 | ||
73 | static inline struct virtio_snd_queue * | |
74 | virtsnd_event_queue(struct virtio_snd *snd) | |
75 | { | |
76 | return &snd->queues[VIRTIO_SND_VQ_EVENT]; | |
77 | } | |
78 | ||
79 | static inline struct virtio_snd_queue * | |
80 | virtsnd_tx_queue(struct virtio_snd *snd) | |
81 | { | |
82 | return &snd->queues[VIRTIO_SND_VQ_TX]; | |
83 | } | |
84 | ||
85 | static inline struct virtio_snd_queue * | |
86 | virtsnd_rx_queue(struct virtio_snd *snd) | |
87 | { | |
88 | return &snd->queues[VIRTIO_SND_VQ_RX]; | |
89 | } | |
90 | ||
f40a2867 AY |
91 | static inline struct virtio_snd_queue * |
92 | virtsnd_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 | ||
ca61a41f AY |
100 | int virtsnd_jack_parse_cfg(struct virtio_snd *snd); |
101 | ||
102 | int virtsnd_jack_build_devs(struct virtio_snd *snd); | |
103 | ||
104 | void virtsnd_jack_event(struct virtio_snd *snd, | |
105 | struct virtio_snd_event *event); | |
106 | ||
19325fed AY |
107 | int virtsnd_chmap_parse_cfg(struct virtio_snd *snd); |
108 | ||
109 | int virtsnd_chmap_build_devs(struct virtio_snd *snd); | |
110 | ||
de3a9980 | 111 | #endif /* VIRTIO_SND_CARD_H */ |