| 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/core/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 | |
| 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 | |
| 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 | |
| 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) |