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 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, 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) 83