hw/virtio/virtio-rng-pci.c

   1 /*
   2  * Virtio rng PCI Bindings
   3  *
   4  * Copyright 2012 Red Hat, Inc.
   5  * Copyright 2012 Amit Shah <amit.shah@redhat.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or
   8  * (at your option) any later version.  See the COPYING file in the
   9  * top-level directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13
  14 #include "hw/virtio/virtio-pci.h"
  15 #include "hw/virtio/virtio-rng.h"
  16 #include "hw/qdev-properties.h"
  17 #include "qapi/error.h"
  18 #include "qemu/module.h"
  19 #include "qom/object.h"
  20
  21 typedef struct VirtIORngPCI VirtIORngPCI;
  22
  23 /*
  24  * virtio-rng-pci: This extends VirtioPCIProxy.
  25  */
  26 #define TYPE_VIRTIO_RNG_PCI "virtio-rng-pci-base"
  27 DECLARE_INSTANCE_CHECKER(VirtIORngPCI, VIRTIO_RNG_PCI,
  28                          TYPE_VIRTIO_RNG_PCI)
  29
  30 struct VirtIORngPCI {
  31     VirtIOPCIProxy parent_obj;
  32     VirtIORNG vdev;
  33 };
  34
  35 static Property virtio_rng_properties[] = {
  36     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  37                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  38     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  39                        DEV_NVECTORS_UNSPECIFIED),
  40     DEFINE_PROP_END_OF_LIST(),
  41 };
  42
  43 static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  44 {
  45     VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
  46     DeviceState *vdev = DEVICE(&vrng->vdev);
  47
  48     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  49         vpci_dev->nvectors = 2;
  50     }
  51
  52     if (!qdev_realize(vdev, BUS(&vpci_dev->bus), errp)) {
  53         return;
  54     }
  55 }
  56
  57 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
  58 {
  59     DeviceClass *dc = DEVICE_CLASS(klass);
  60     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  61     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  62
  63     k->realize = virtio_rng_pci_realize;
  64     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  65
  66     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  67     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
  68     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  69     pcidev_k->class_id = PCI_CLASS_OTHERS;
  70     device_class_set_props(dc, virtio_rng_properties);
  71 }
  72
  73 static void virtio_rng_initfn(Object *obj)
  74 {
  75     VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
  76
  77     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  78                                 TYPE_VIRTIO_RNG);
  79 }
  80
  81 static const VirtioPCIDeviceTypeInfo virtio_rng_pci_info = {
  82     .base_name             = TYPE_VIRTIO_RNG_PCI,
  83     .generic_name          = "virtio-rng-pci",
  84     .transitional_name     = "virtio-rng-pci-transitional",
  85     .non_transitional_name = "virtio-rng-pci-non-transitional",
  86     .instance_size = sizeof(VirtIORngPCI),
  87     .instance_init = virtio_rng_initfn,
  88     .class_init    = virtio_rng_pci_class_init,
  89 };
  90
  91 static void virtio_rng_pci_register(void)
  92 {
  93     virtio_pci_types_register(&virtio_rng_pci_info);
  94 }
  95
  96 type_init(virtio_rng_pci_register)