qemu

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/*
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 * VIRTIO Sound Device PCI Bindings
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 *
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 * Copyright (c) 2023 Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
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 *
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 * This work is licensed under the terms of the GNU GPL, version 2 or
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 * (at your option) any later version.  See the COPYING file in the
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 * top-level directory.
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 */
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#include "qemu/osdep.h"
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#include "qom/object.h"
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#include "qapi/error.h"
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#include "hw/audio/soundhw.h"
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#include "hw/virtio/virtio-pci.h"
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#include "hw/audio/virtio-snd.h"
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/*
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 * virtio-snd-pci: This extends VirtioPCIProxy.
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 */
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#define TYPE_VIRTIO_SND_PCI "virtio-sound-pci"
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OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSoundPCI, VIRTIO_SND_PCI)
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struct VirtIOSoundPCI {
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    VirtIOPCIProxy parent_obj;
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    VirtIOSound vdev;
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};
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static Property virtio_snd_pci_properties[] = {
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    DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
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                    VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
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    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
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    DEFINE_PROP_END_OF_LIST(),
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};
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static void virtio_snd_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
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{
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    VirtIOSoundPCI *dev = VIRTIO_SND_PCI(vpci_dev);
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    DeviceState *vdev = DEVICE(&dev->vdev);
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    virtio_pci_force_virtio_1(vpci_dev);
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    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
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}
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static void virtio_snd_pci_class_init(ObjectClass *klass, void *data)
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{
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    DeviceClass *dc = DEVICE_CLASS(klass);
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    VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
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    PCIDeviceClass *pcidevklass = PCI_DEVICE_CLASS(klass);
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    device_class_set_props(dc, virtio_snd_pci_properties);
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    dc->desc = "Virtio Sound";
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    set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
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    vpciklass->realize = virtio_snd_pci_realize;
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    pcidevklass->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
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}
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static void virtio_snd_pci_instance_init(Object *obj)
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{
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    VirtIOSoundPCI *dev = VIRTIO_SND_PCI(obj);
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    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
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                                TYPE_VIRTIO_SND);
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}
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static const VirtioPCIDeviceTypeInfo virtio_snd_pci_info = {
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    .generic_name  = TYPE_VIRTIO_SND_PCI,
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    .instance_size = sizeof(VirtIOSoundPCI),
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    .instance_init = virtio_snd_pci_instance_init,
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    .class_init    = virtio_snd_pci_class_init,
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};
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/* Create a Virtio Sound PCI device, so '-audio driver,model=virtio' works. */
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static int virtio_snd_pci_init(PCIBus *bus, const char *audiodev)
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{
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    DeviceState *vdev = NULL;
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    VirtIOSoundPCI *dev = NULL;
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    vdev = qdev_new(TYPE_VIRTIO_SND_PCI);
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    assert(vdev);
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    dev = VIRTIO_SND_PCI(vdev);
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    qdev_prop_set_string(DEVICE(&dev->vdev), "audiodev", audiodev);
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    qdev_realize_and_unref(vdev, BUS(bus), &error_fatal);
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    return 0;
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}
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static void virtio_snd_pci_register(void)
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{
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    virtio_pci_types_register(&virtio_snd_pci_info);
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    pci_register_soundhw("virtio", "Virtio Sound", virtio_snd_pci_init);
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}
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type_init(virtio_snd_pci_register);
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