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

   1/*
   2 * Virtio scsi 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 or
  12 * (at your option) any later version.  See the COPYING file in the
  13 * top-level directory.
  14 */
  15
  16#include "qemu/osdep.h"
  17
  18#include "hw/qdev-properties.h"
  19#include "hw/virtio/virtio-scsi.h"
  20#include "qemu/module.h"
  21#include "virtio-pci.h"
  22
  23typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
  24
  25/*
  26 * virtio-scsi-pci: This extends VirtioPCIProxy.
  27 */
  28#define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci-base"
  29#define VIRTIO_SCSI_PCI(obj) \
  30        OBJECT_CHECK(VirtIOSCSIPCI, (obj), TYPE_VIRTIO_SCSI_PCI)
  31
  32struct VirtIOSCSIPCI {
  33    VirtIOPCIProxy parent_obj;
  34    VirtIOSCSI vdev;
  35};
  36
  37static Property virtio_scsi_pci_properties[] = {
  38    DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  39                    VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  40    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  41                       DEV_NVECTORS_UNSPECIFIED),
  42    DEFINE_PROP_END_OF_LIST(),
  43};
  44
  45static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  46{
  47    VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
  48    DeviceState *vdev = DEVICE(&dev->vdev);
  49    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
  50    DeviceState *proxy = DEVICE(vpci_dev);
  51    char *bus_name;
  52
  53    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  54        vpci_dev->nvectors = vs->conf.num_queues + 3;
  55    }
  56
  57    /*
  58     * For command line compatibility, this sets the virtio-scsi-device bus
  59     * name as before.
  60     */
  61    if (proxy->id) {
  62        bus_name = g_strdup_printf("%s.0", proxy->id);
  63        virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
  64        g_free(bus_name);
  65    }
  66
  67    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  68    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  69}
  70
  71static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
  72{
  73    DeviceClass *dc = DEVICE_CLASS(klass);
  74    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  75    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  76
  77    k->realize = virtio_scsi_pci_realize;
  78    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  79    dc->props = virtio_scsi_pci_properties;
  80    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  81    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  82    pcidev_k->revision = 0x00;
  83    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  84}
  85
  86static void virtio_scsi_pci_instance_init(Object *obj)
  87{
  88    VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
  89
  90    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  91                                TYPE_VIRTIO_SCSI);
  92}
  93
  94static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info = {
  95    .base_name              = TYPE_VIRTIO_SCSI_PCI,
  96    .generic_name           = "virtio-scsi-pci",
  97    .transitional_name      = "virtio-scsi-pci-transitional",
  98    .non_transitional_name  = "virtio-scsi-pci-non-transitional",
  99    .instance_size = sizeof(VirtIOSCSIPCI),
 100    .instance_init = virtio_scsi_pci_instance_init,
 101    .class_init    = virtio_scsi_pci_class_init,
 102};
 103
 104static void virtio_scsi_pci_register(void)
 105{
 106    virtio_pci_types_register(&virtio_scsi_pci_info);
 107}
 108
 109type_init(virtio_scsi_pci_register)
 110