1 /*
2 * VIRTIO Sound Device PCI Bindings
3 *
4 * Copyright (c) 2023 Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * (at your option) any later version. See the COPYING file in the
8 * top-level directory.
9 */
10
11 #include "qemu/osdep.h"
12 #include "qom/object.h"
13 #include "qapi/error.h"
14 #include "hw/audio/soundhw.h"
15 #include "hw/virtio/virtio-pci.h"
16 #include "hw/audio/virtio-snd.h"
17
18 /*
19 * virtio-snd-pci: This extends VirtioPCIProxy.
20 */
21 #define TYPE_VIRTIO_SND_PCI "virtio-sound-pci"
22 OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSoundPCI, VIRTIO_SND_PCI)
23
24 struct VirtIOSoundPCI {
25 VirtIOPCIProxy parent_obj;
26
27 VirtIOSound vdev;
28 };
29
30 static Property virtio_snd_pci_properties[] = {
31 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
32 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
33 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
34 DEFINE_PROP_END_OF_LIST(),
35 };
36
virtio_snd_pci_realize(VirtIOPCIProxy * vpci_dev,Error ** errp)37 static void virtio_snd_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
38 {
39 VirtIOSoundPCI *dev = VIRTIO_SND_PCI(vpci_dev);
40 DeviceState *vdev = DEVICE(&dev->vdev);
41
42 virtio_pci_force_virtio_1(vpci_dev);
43 qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
44 }
45
virtio_snd_pci_class_init(ObjectClass * klass,void * data)46 static void virtio_snd_pci_class_init(ObjectClass *klass, void *data)
47 {
48 DeviceClass *dc = DEVICE_CLASS(klass);
49 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
50 PCIDeviceClass *pcidevklass = PCI_DEVICE_CLASS(klass);
51
52 device_class_set_props(dc, virtio_snd_pci_properties);
53 dc->desc = "Virtio Sound";
54 set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
55
56 vpciklass->realize = virtio_snd_pci_realize;
57 pcidevklass->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
58 }
59
virtio_snd_pci_instance_init(Object * obj)60 static void virtio_snd_pci_instance_init(Object *obj)
61 {
62 VirtIOSoundPCI *dev = VIRTIO_SND_PCI(obj);
63
64 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
65 TYPE_VIRTIO_SND);
66 }
67
68 static const VirtioPCIDeviceTypeInfo virtio_snd_pci_info = {
69 .generic_name = TYPE_VIRTIO_SND_PCI,
70 .instance_size = sizeof(VirtIOSoundPCI),
71 .instance_init = virtio_snd_pci_instance_init,
72 .class_init = virtio_snd_pci_class_init,
73 };
74
75 /* Create a Virtio Sound PCI device, so '-audio driver,model=virtio' works. */
virtio_snd_pci_init(PCIBus * bus,const char * audiodev)76 static int virtio_snd_pci_init(PCIBus *bus, const char *audiodev)
77 {
78 DeviceState *vdev = NULL;
79 VirtIOSoundPCI *dev = NULL;
80
81 vdev = qdev_new(TYPE_VIRTIO_SND_PCI);
82 assert(vdev);
83 dev = VIRTIO_SND_PCI(vdev);
84 qdev_prop_set_string(DEVICE(&dev->vdev), "audiodev", audiodev);
85 qdev_realize_and_unref(vdev, BUS(bus), &error_fatal);
86 return 0;
87 }
88
virtio_snd_pci_register(void)89 static void virtio_snd_pci_register(void)
90 {
91 virtio_pci_types_register(&virtio_snd_pci_info);
92 pci_register_soundhw("virtio", "Virtio Sound", virtio_snd_pci_init);
93 }
94
95 type_init(virtio_snd_pci_register);
96