[RFC PATCH 06/27] virtio-snd: Add PCI wrapper code for VirtIOSound

[Shreyansh Chouhan]

Added the virito-snd.c file which contains a wrapper
for combining the device with the VirtIOPCIProxy.

Signed-off-by: Shreyansh Chouhan <chouhan.shreyansh2702@gmail.com>
---
 hw/virtio/meson.build      |  1 +
 hw/virtio/virtio-snd-pci.c | 72 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)
 create mode 100644 hw/virtio/virtio-snd-pci.c

diff --git a/hw/virtio/meson.build b/hw/virtio/meson.build
index fbff9bc9d4..a4593f7631 100644
--- a/hw/virtio/meson.build
+++ b/hw/virtio/meson.build
@@ -45,6 +45,7 @@ virtio_pci_ss.add(when: 'CONFIG_VIRTIO_SERIAL', if_true: 
files('virtio-serial-pc
 virtio_pci_ss.add(when: 'CONFIG_VIRTIO_PMEM', if_true: 
files('virtio-pmem-pci.c'))
 virtio_pci_ss.add(when: 'CONFIG_VIRTIO_IOMMU', if_true: 
files('virtio-iommu-pci.c'))
 virtio_pci_ss.add(when: 'CONFIG_VIRTIO_MEM', if_true: 
files('virtio-mem-pci.c'))
+virtio_pci_ss.add(when: 'CONFIG_VIRTIO_SND', if_true: 
files('virtio-snd-pci.c'))
 
 virtio_ss.add_all(when: 'CONFIG_VIRTIO_PCI', if_true: virtio_pci_ss)
 
diff --git a/hw/virtio/virtio-snd-pci.c b/hw/virtio/virtio-snd-pci.c
new file mode 100644
index 0000000000..8d8e4ffa51
--- /dev/null
+++ b/hw/virtio/virtio-snd-pci.c
@@ -0,0 +1,72 @@
+/*
+ * Virtio sound PCI Bindings
+ */
+
+#include "qemu/osdep.h"
+#include "hw/virtio/virtio-snd.h"
+#include "hw/virtio/virtio-pci.h"
+#include "qapi/error.h"
+#include "qemu/module.h"
+#include "qom/object.h"
+
+typedef struct VirtIOSoundPCI VirtIOSoundPCI;
+
+/*
+ * virtio-snd-pci: This extends VirtioPCIProxy.
+ */
+#define TYPE_VIRTIO_SOUND_PCI "virtio-sound-pci-base"
+DECLARE_INSTANCE_CHECKER(VirtIOSoundPCI, VIRTIO_SOUND_PCI,
+                         TYPE_VIRTIO_SOUND_PCI)
+
+struct VirtIOSoundPCI {
+    VirtIOPCIProxy parent_obj;
+    VirtIOSound vdev;
+};
+
+static Property virtio_sound_properties[] = {
+    DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
+                    VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_snd_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+    VirtIOSoundPCI *dev = VIRTIO_SOUND_PCI(vpci_dev);
+    DeviceState *vdev = DEVICE(&dev->vdev);
+
+    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
+}
+
+static void virtio_snd_pci_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+    VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
+
+    k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
+    set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
+    device_class_set_props(dc, virtio_sound_properties);
+    vpciklass->realize = virtio_snd_pci_realize;
+}
+
+static void virtio_snd_pci_instance_init(Object *obj)
+{
+    VirtIOSoundPCI *dev = VIRTIO_SOUND_PCI(obj);
+    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+                                TYPE_VIRTIO_SOUND);
+}
+
+static const VirtioPCIDeviceTypeInfo virtio_snd_pci_info = {
+    .base_name              = TYPE_VIRTIO_SOUND_PCI,
+    .generic_name           = "virtio-snd-pci",
+    .instance_size = sizeof(VirtIOSoundPCI),
+    .instance_init = virtio_snd_pci_instance_init,
+    .class_init    = virtio_snd_pci_class_init,
+};
+
+static void virtio_snd_pci_register(void)
+{
+    virtio_pci_types_register(&virtio_snd_pci_info);
+}
+
+type_init(virtio_snd_pci_register);
-- 
2.25.1