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/qdev-properties.h"
  21#include "hw/virtio/virtio-blk.h"
  22#include "virtio-pci.h"
  23#include "qapi/error.h"
  24#include "qemu/module.h"
  25
  26typedef struct VirtIOBlkPCI VirtIOBlkPCI;
  27
  28/*
  29 * virtio-blk-pci: This extends VirtioPCIProxy.
  30 */
  31#define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base"
  32#define VIRTIO_BLK_PCI(obj) \
  33        OBJECT_CHECK(VirtIOBlkPCI, (obj), TYPE_VIRTIO_BLK_PCI)
  34
  35struct VirtIOBlkPCI {
  36    VirtIOPCIProxy parent_obj;
  37    VirtIOBlock vdev;
  38};
  39
  40static Property virtio_blk_pci_properties[] = {
  41    DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  42    DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  43                    VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  44    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  45                       DEV_NVECTORS_UNSPECIFIED),
  46    DEFINE_PROP_END_OF_LIST(),
  47};
  48
  49static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  50{
  51    VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
  52    DeviceState *vdev = DEVICE(&dev->vdev);
  53
  54    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  55        vpci_dev->nvectors = dev->vdev.conf.num_queues + 1;
  56    }
  57
  58    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  59    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  60}
  61
  62static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
  63{
  64    DeviceClass *dc = DEVICE_CLASS(klass);
  65    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  66    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  67
  68    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  69    dc->props = virtio_blk_pci_properties;
  70    k->realize = virtio_blk_pci_realize;
  71    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  72    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
  73    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  74    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  75}
  76
  77static void virtio_blk_pci_instance_init(Object *obj)
  78{
  79    VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
  80
  81    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  82                                TYPE_VIRTIO_BLK);
  83    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  84                              "bootindex", &error_abort);
  85}
  86
  87static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = {
  88    .base_name              = TYPE_VIRTIO_BLK_PCI,
  89    .generic_name           = "virtio-blk-pci",
  90    .transitional_name      = "virtio-blk-pci-transitional",
  91    .non_transitional_name  = "virtio-blk-pci-non-transitional",
  92    .instance_size = sizeof(VirtIOBlkPCI),
  93    .instance_init = virtio_blk_pci_instance_init,
  94    .class_init    = virtio_blk_pci_class_init,
  95};
  96
  97static void virtio_blk_pci_register(void)
  98{
  99    virtio_pci_types_register(&virtio_blk_pci_info);
 100}
 101
 102type_init(virtio_blk_pci_register)
 103