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#include "qom/object.h"
  26
  27typedef struct VirtIOBlkPCI VirtIOBlkPCI;
  28
  29/*
  30 * virtio-blk-pci: This extends VirtioPCIProxy.
  31 */
  32#define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base"
  33DECLARE_INSTANCE_CHECKER(VirtIOBlkPCI, VIRTIO_BLK_PCI,
  34                         TYPE_VIRTIO_BLK_PCI)
  35
  36struct VirtIOBlkPCI {
  37    VirtIOPCIProxy parent_obj;
  38    VirtIOBlock vdev;
  39};
  40
  41static Property virtio_blk_pci_properties[] = {
  42    DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  43    DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  44                    VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  45    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  46                       DEV_NVECTORS_UNSPECIFIED),
  47    DEFINE_PROP_END_OF_LIST(),
  48};
  49
  50static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  51{
  52    VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
  53    DeviceState *vdev = DEVICE(&dev->vdev);
  54    VirtIOBlkConf *conf = &dev->vdev.conf;
  55
  56    if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) {
  57        conf->num_queues = virtio_pci_optimal_num_queues(0);
  58    }
  59
  60    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  61        vpci_dev->nvectors = conf->num_queues + 1;
  62    }
  63
  64    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  65}
  66
  67static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
  68{
  69    DeviceClass *dc = DEVICE_CLASS(klass);
  70    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  71    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  72
  73    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  74    device_class_set_props(dc, virtio_blk_pci_properties);
  75    k->realize = virtio_blk_pci_realize;
  76    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  77    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
  78    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  79    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  80}
  81
  82static void virtio_blk_pci_instance_init(Object *obj)
  83{
  84    VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
  85
  86    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  87                                TYPE_VIRTIO_BLK);
  88    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  89                              "bootindex");
  90}
  91
  92static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = {
  93    .base_name              = TYPE_VIRTIO_BLK_PCI,
  94    .generic_name           = "virtio-blk-pci",
  95    .transitional_name      = "virtio-blk-pci-transitional",
  96    .non_transitional_name  = "virtio-blk-pci-non-transitional",
  97    .instance_size = sizeof(VirtIOBlkPCI),
  98    .instance_init = virtio_blk_pci_instance_init,
  99    .class_init    = virtio_blk_pci_class_init,
 100};
 101
 102static void virtio_blk_pci_register(void)
 103{
 104    virtio_pci_types_register(&virtio_blk_pci_info);
 105}
 106
 107type_init(virtio_blk_pci_register)
 108