1 /*
2 * Vhost-user snd virtio device
3 *
4 * Copyright (c) 2023 Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
5 *
6 * Simple wrapper of the generic vhost-user-device.
7 *
8 * SPDX-License-Identifier: GPL-2.0-or-later
9 */
10
11 #include "qemu/osdep.h"
12 #include "qapi/error.h"
13 #include "hw/qdev-properties.h"
14 #include "hw/virtio/virtio-bus.h"
15 #include "hw/virtio/vhost-user-snd.h"
16 #include "standard-headers/linux/virtio_ids.h"
17 #include "standard-headers/linux/virtio_snd.h"
18
19 static const VirtIOFeature feature_sizes[] = {
20 {.flags = 1ULL << VIRTIO_SND_F_CTLS,
21 .end = endof(struct virtio_snd_config, controls)},
22 {}
23 };
24
25 static const VirtIOConfigSizeParams cfg_size_params = {
26 .min_size = endof(struct virtio_snd_config, chmaps),
27 .max_size = sizeof(struct virtio_snd_config),
28 .feature_sizes = feature_sizes
29 };
30
31 static const VMStateDescription vu_snd_vmstate = {
32 .name = "vhost-user-snd",
33 .unmigratable = 1,
34 };
35
36 static const Property vsnd_properties[] = {
37 DEFINE_PROP_CHR("chardev", VHostUserBase, chardev),
38 DEFINE_PROP_BIT64("controls", VHostUserBase,
39 parent_obj.host_features, VIRTIO_SND_F_CTLS, false),
40 };
41
vu_snd_base_realize(DeviceState * dev,Error ** errp)42 static void vu_snd_base_realize(DeviceState *dev, Error **errp)
43 {
44 VHostUserBase *vub = VHOST_USER_BASE(dev);
45 VHostUserBaseClass *vubs = VHOST_USER_BASE_GET_CLASS(dev);
46 VirtIODevice *vdev = &vub->parent_obj;
47
48 vub->virtio_id = VIRTIO_ID_SOUND;
49 vub->num_vqs = 4;
50 vub->config_size = virtio_get_config_size(&cfg_size_params,
51 vdev->host_features);
52 vub->vq_size = 64;
53
54 vubs->parent_realize(dev, errp);
55 }
56
vu_snd_class_init(ObjectClass * klass,const void * data)57 static void vu_snd_class_init(ObjectClass *klass, const void *data)
58 {
59 DeviceClass *dc = DEVICE_CLASS(klass);
60 VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
61
62 dc->vmsd = &vu_snd_vmstate;
63 device_class_set_props(dc, vsnd_properties);
64 device_class_set_parent_realize(dc, vu_snd_base_realize,
65 &vubc->parent_realize);
66
67 set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
68 }
69
70 static const TypeInfo vu_snd_info = {
71 .name = TYPE_VHOST_USER_SND,
72 .parent = TYPE_VHOST_USER_BASE,
73 .instance_size = sizeof(VHostUserSound),
74 .class_init = vu_snd_class_init,
75 };
76
vu_snd_register_types(void)77 static void vu_snd_register_types(void)
78 {
79 type_register_static(&vu_snd_info);
80 }
81
82 type_init(vu_snd_register_types)
83