LXR qemu/hw/virtio/virtio-blk-pci.c

   1/*
   2 * Virtio blk PCI Bindings
   3 *
   4 * Copyright IBM, Corp. 2007
   5 * Copyright (c) 2009 CodeSourcery
   6 *
   7 * Authors:
   8 *  Anthony Liguori   <aliguori@us.ibm.com>
   9 *  Paul Brook        <paul@codesourcery.com>
  10 *
  11 * This work is licensed under the terms of the GNU GPL, version 2.  See
  12 * the COPYING file in the top-level directory.
  13 *
  14 * Contributions after 2012-01-13 are licensed under the terms of the
  15 * GNU GPL, version 2 or (at your option) any later version.
  16 */
  17
  18#include "qemu/osdep.h"
  19
  20#include "hw/virtio/virtio-blk.h"
  21#include "virtio-pci.h"
  22#include "qapi/error.h"
  23
  24typedef struct VirtIOBlkPCI VirtIOBlkPCI;
  25
  26/*
  27 * virtio-blk-pci: This extends VirtioPCIProxy.
  28 */
  29#define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base"
  30#define VIRTIO_BLK_PCI(obj) \
  31        OBJECT_CHECK(VirtIOBlkPCI, (obj), TYPE_VIRTIO_BLK_PCI)
  32
  33struct VirtIOBlkPCI {
  34    VirtIOPCIProxy parent_obj;
  35    VirtIOBlock vdev;
  36};
  37
  38static Property virtio_blk_pci_properties[] = {
  39    DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  40    DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  41                    VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  42    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  43                       DEV_NVECTORS_UNSPECIFIED),
  44    DEFINE_PROP_END_OF_LIST(),
  45};
  46
  47static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  48{
  49    VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
  50    DeviceState *vdev = DEVICE(&dev->vdev);
  51
  52    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  53        vpci_dev->nvectors = dev->vdev.conf.num_queues + 1;
  54    }
  55
  56    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  57    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  58}
  59
  60static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
  61{
  62    DeviceClass *dc = DEVICE_CLASS(klass);
  63    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  64    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  65
  66    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  67    dc->props = virtio_blk_pci_properties;
  68    k->realize = virtio_blk_pci_realize;
  69    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  70    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
  71    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  72    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  73}
  74
  75static void virtio_blk_pci_instance_init(Object *obj)
  76{
  77    VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
  78
  79    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  80                                TYPE_VIRTIO_BLK);
  81    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  82                              "bootindex", &error_abort);
  83}
  84
  85static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = {
  86    .base_name              = TYPE_VIRTIO_BLK_PCI,
  87    .generic_name           = "virtio-blk-pci",
  88    .transitional_name      = "virtio-blk-pci-transitional",
  89    .non_transitional_name  = "virtio-blk-pci-non-transitional",
  90    .instance_size = sizeof(VirtIOBlkPCI),
  91    .instance_init = virtio_blk_pci_instance_init,
  92    .class_init    = virtio_blk_pci_class_init,
  93};
  94
  95static void virtio_blk_pci_register(void)
  96{
  97    virtio_pci_types_register(&virtio_blk_pci_info);
  98}
  99
 100type_init(virtio_blk_pci_register)
 101