Add virtio-loopback-adapter

The virtio-loopback-adapter is part of the Virtio Loopback
architecture detailed in the following link:
  https://git.virtualopensystems.com/virtio-loopback/docs

The following vhost-user devices are supported:
- vhost-user-blk
- vhost-user-rng
- vhost-user-input
- vhost-user-gpio
- vhost-user-sound

Bug-AGL: SPEC-4834
Change-Id: I4edb28faf370992f5f45390f5c4240a0f5c3084c
Signed-off-by: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/vhost_user_sound.h b/vhost_user_sound.h
new file mode 100644
index 0000000..c2dc73f
--- /dev/null
+++ b/vhost_user_sound.h
@@ -0,0 +1,40 @@
+/*
+ * Based on vhost-user-sound.h of QEMU project
+ *
+ * Copyright 2020 Red Hat, Inc.
+ *
+ * Copyright (c) 2023 Virtual Open Systems SAS.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version.  See the COPYING file in the
+ * top-level directory.
+ *
+ */
+
+#ifndef VHOST_USER_SOUND
+#define VHOST_USER_SOUND
+
+#include "virtio_loopback.h"
+#include "vhost_loopback.h"
+#include "vhost_user_loopback.h"
+#include <linux/virtio_snd.h>
+
+typedef struct VHostUserSound {
+    /*< private >*/
+    VirtIODevice *parent;
+    struct vhost_virtqueue *vhost_vqs;
+    VirtQueue **virtqs;
+    uint16_t num_queues;
+    uint32_t queue_size;
+    struct virtio_snd_config config;
+    struct vhost_dev *vhost_dev;
+    VirtQueue *ctrl_vq;
+    VirtQueue *event_vq;
+    VirtQueue *tx_vq;
+    VirtQueue *rx_vq;
+    /*< public >*/
+} VHostUserSound;
+
+void vus_device_realize(void);
+
+#endif /* VHOST_USER_BLK */