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 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 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 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. */ 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 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