hw/virtio: add vhost-user-snd and vhost-user-snd-pci devices
Tested with rust-vmm vhost-user-sound daemon:
RUST_LOG=trace cargo run --bin vhost-user-sound -- --socket /tmp/snd.sock --backend null
Invocation:
qemu-system-x86_64 \
-qmp unix:./qmp-sock,server,wait=off \
-m 4096 \
-numa node,memdev=mem \
-object memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on \
-D qemu.log \
-d guest_errors,trace:\*snd\*,trace:\*sound\*,trace:\*vhost\* \
-chardev socket,id=vsnd,path=/tmp/snd.sock \
-device vhost-user-snd-pci,chardev=vsnd,id=snd \
/path/to/disk
[AJB: imported from https://github.com/epilys/qemu-virtio-snd/commit/54ae1cdd15fef2d88e9e387a175f099a38c636f4.patch]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Message-Id: <20240104210945.1223134-7-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 2426368..aff5342 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2342,6 +2342,13 @@
F: include/hw/virtio/vhost-user-gpio.h
F: tests/qtest/libqos/virtio-gpio.*
+vhost-user-snd
+M: Alex Bennée <alex.bennee@linaro.org>
+R: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
+S: Maintained
+F: hw/virtio/vhost-user-snd*
+F: include/hw/virtio/vhost-user-snd.h
+
vhost-user-scmi
R: mzamazal@redhat.com
S: Supported
diff --git a/hw/virtio/Kconfig b/hw/virtio/Kconfig
index 92c9cf6..aa63ff7 100644
--- a/hw/virtio/Kconfig
+++ b/hw/virtio/Kconfig
@@ -101,6 +101,11 @@
default y
depends on VIRTIO && VHOST_VDPA && LINUX
+config VHOST_USER_SND
+ bool
+ default y
+ depends on VIRTIO && VHOST_USER
+
config VHOST_USER_SCMI
bool
default y
diff --git a/hw/virtio/meson.build b/hw/virtio/meson.build
index 685d586..af8abae 100644
--- a/hw/virtio/meson.build
+++ b/hw/virtio/meson.build
@@ -24,6 +24,7 @@
system_virtio_ss.add(when: 'CONFIG_VHOST_USER_GPIO', if_true: files('vhost-user-gpio.c'))
system_virtio_ss.add(when: 'CONFIG_VHOST_USER_I2C', if_true: files('vhost-user-i2c.c'))
system_virtio_ss.add(when: 'CONFIG_VHOST_USER_RNG', if_true: files('vhost-user-rng.c'))
+ system_virtio_ss.add(when: 'CONFIG_VHOST_USER_SND', if_true: files('vhost-user-snd.c'))
# PCI Stubs
system_virtio_ss.add(when: 'CONFIG_VIRTIO_PCI', if_true: files('vhost-user-device-pci.c'))
@@ -33,6 +34,8 @@
if_true: files('vhost-user-i2c-pci.c'))
system_virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_RNG'],
if_true: files('vhost-user-rng-pci.c'))
+ system_virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_SND'],
+ if_true: files('vhost-user-snd-pci.c'))
endif
if have_vhost_vdpa
system_virtio_ss.add(files('vhost-vdpa.c'))
diff --git a/hw/virtio/vhost-user-snd-pci.c b/hw/virtio/vhost-user-snd-pci.c
new file mode 100644
index 0000000..d61cfda
--- /dev/null
+++ b/hw/virtio/vhost-user-snd-pci.c
@@ -0,0 +1,75 @@
+/*
+ * Vhost-user Sound virtio device PCI glue
+ *
+ * Copyright (c) 2023 Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "hw/qdev-properties.h"
+#include "hw/virtio/vhost-user-snd.h"
+#include "hw/virtio/virtio-pci.h"
+
+struct VHostUserSoundPCI {
+ VirtIOPCIProxy parent_obj;
+ VHostUserSound vdev;
+};
+
+typedef struct VHostUserSoundPCI VHostUserSoundPCI;
+
+#define TYPE_VHOST_USER_SND_PCI "vhost-user-snd-pci-base"
+
+DECLARE_INSTANCE_CHECKER(VHostUserSoundPCI, VHOST_USER_SND_PCI,
+ TYPE_VHOST_USER_SND_PCI)
+
+static Property vhost_user_snd_pci_properties[] = {
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vhost_user_snd_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ VHostUserSoundPCI *dev = VHOST_USER_SND_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&dev->vdev);
+
+ vpci_dev->nvectors = 1;
+
+ qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
+}
+
+static void vhost_user_snd_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+ k->realize = vhost_user_snd_pci_realize;
+ set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
+ device_class_set_props(dc, vhost_user_snd_pci_properties);
+ pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ pcidev_k->device_id = 0; /* Set by virtio-pci based on virtio id */
+ pcidev_k->revision = 0x00;
+ pcidev_k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
+}
+
+static void vhost_user_snd_pci_instance_init(Object *obj)
+{
+ VHostUserSoundPCI *dev = VHOST_USER_SND_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VHOST_USER_SND);
+}
+
+static const VirtioPCIDeviceTypeInfo vhost_user_snd_pci_info = {
+ .base_name = TYPE_VHOST_USER_SND_PCI,
+ .non_transitional_name = "vhost-user-snd-pci",
+ .instance_size = sizeof(VHostUserSoundPCI),
+ .instance_init = vhost_user_snd_pci_instance_init,
+ .class_init = vhost_user_snd_pci_class_init,
+};
+
+static void vhost_user_snd_pci_register(void)
+{
+ virtio_pci_types_register(&vhost_user_snd_pci_info);
+}
+
+type_init(vhost_user_snd_pci_register);
diff --git a/hw/virtio/vhost-user-snd.c b/hw/virtio/vhost-user-snd.c
new file mode 100644
index 0000000..9a21754
--- /dev/null
+++ b/hw/virtio/vhost-user-snd.c
@@ -0,0 +1,67 @@
+/*
+ * Vhost-user snd virtio device
+ *
+ * Copyright (c) 2023 Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
+ *
+ * Simple wrapper of the generic vhost-user-device.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/qdev-properties.h"
+#include "hw/virtio/virtio-bus.h"
+#include "hw/virtio/vhost-user-snd.h"
+#include "standard-headers/linux/virtio_ids.h"
+#include "standard-headers/linux/virtio_snd.h"
+
+static const VMStateDescription vu_snd_vmstate = {
+ .name = "vhost-user-snd",
+ .unmigratable = 1,
+};
+
+static Property vsnd_properties[] = {
+ DEFINE_PROP_CHR("chardev", VHostUserBase, chardev),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vu_snd_base_realize(DeviceState *dev, Error **errp)
+{
+ VHostUserBase *vub = VHOST_USER_BASE(dev);
+ VHostUserBaseClass *vubs = VHOST_USER_BASE_GET_CLASS(dev);
+
+ vub->virtio_id = VIRTIO_ID_SOUND;
+ vub->num_vqs = 4;
+ vub->config_size = sizeof(struct virtio_snd_config);
+ vub->vq_size = 64;
+
+ vubs->parent_realize(dev, errp);
+}
+
+static void vu_snd_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
+
+ dc->vmsd = &vu_snd_vmstate;
+ device_class_set_props(dc, vsnd_properties);
+ device_class_set_parent_realize(dc, vu_snd_base_realize,
+ &vubc->parent_realize);
+
+ set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
+}
+
+static const TypeInfo vu_snd_info = {
+ .name = TYPE_VHOST_USER_SND,
+ .parent = TYPE_VHOST_USER_BASE,
+ .instance_size = sizeof(VHostUserSound),
+ .class_init = vu_snd_class_init,
+};
+
+static void vu_snd_register_types(void)
+{
+ type_register_static(&vu_snd_info);
+}
+
+type_init(vu_snd_register_types)
diff --git a/include/hw/virtio/vhost-user-snd.h b/include/hw/virtio/vhost-user-snd.h
new file mode 100644
index 0000000..f926011
--- /dev/null
+++ b/include/hw/virtio/vhost-user-snd.h
@@ -0,0 +1,24 @@
+/*
+ * Vhost-user Sound virtio device
+ *
+ * Copyright (c) 2021 Mathieu Poirier <mathieu.poirier@linaro.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef QEMU_VHOST_USER_SND_H
+#define QEMU_VHOST_USER_SND_H
+
+#include "hw/virtio/virtio.h"
+#include "hw/virtio/vhost.h"
+#include "hw/virtio/vhost-user.h"
+#include "hw/virtio/vhost-user-base.h"
+
+#define TYPE_VHOST_USER_SND "vhost-user-snd"
+OBJECT_DECLARE_SIMPLE_TYPE(VHostUserSound, VHOST_USER_SND)
+
+struct VHostUserSound {
+ VHostUserBase parent_obj;
+};
+
+#endif /* QEMU_VHOST_USER_SND_H */
