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#include "qom/object.h"
  23
  24typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
  25
  26/*
  27 * virtio-scsi-pci: This extends VirtioPCIProxy.
  28 */
  29#define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci-base"
  30DECLARE_INSTANCE_CHECKER(VirtIOSCSIPCI, VIRTIO_SCSI_PCI,
  31                         TYPE_VIRTIO_SCSI_PCI)
  32
  33struct VirtIOSCSIPCI {
  34    VirtIOPCIProxy parent_obj;
  35    VirtIOSCSI vdev;
  36};
  37
  38static Property virtio_scsi_pci_properties[] = {
  39    DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  40                    VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  41    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  42                       DEV_NVECTORS_UNSPECIFIED),
  43    DEFINE_PROP_END_OF_LIST(),
  44};
  45
  46static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  47{
  48    VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
  49    DeviceState *vdev = DEVICE(&dev->vdev);
  50    DeviceState *proxy = DEVICE(vpci_dev);
  51    VirtIOSCSIConf *conf = &dev->vdev.parent_obj.conf;
  52    char *bus_name;
  53
  54    if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
  55        conf->num_queues =
  56            virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED);
  57    }
  58
  59    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  60        vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1;
  61    }
  62
  63    /*
  64     * For command line compatibility, this sets the virtio-scsi-device bus
  65     * name as before.
  66     */
  67    if (proxy->id) {
  68        bus_name = g_strdup_printf("%s.0", proxy->id);
  69        virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
  70        g_free(bus_name);
  71    }
  72
  73    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  74}
  75
  76static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
  77{
  78    DeviceClass *dc = DEVICE_CLASS(klass);
  79    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  80    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  81
  82    k->realize = virtio_scsi_pci_realize;
  83    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  84    device_class_set_props(dc, virtio_scsi_pci_properties);
  85    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  86    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  87    pcidev_k->revision = 0x00;
  88    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  89}
  90
  91static void virtio_scsi_pci_instance_init(Object *obj)
  92{
  93    VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
  94
  95    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  96                                TYPE_VIRTIO_SCSI);
  97}
  98
  99static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info = {
 100    .base_name              = TYPE_VIRTIO_SCSI_PCI,
 101    .generic_name           = "virtio-scsi-pci",
 102    .transitional_name      = "virtio-scsi-pci-transitional",
 103    .non_transitional_name  = "virtio-scsi-pci-non-transitional",
 104    .instance_size = sizeof(VirtIOSCSIPCI),
 105    .instance_init = virtio_scsi_pci_instance_init,
 106    .class_init    = virtio_scsi_pci_class_init,
 107};
 108
 109static void virtio_scsi_pci_register(void)
 110{
 111    virtio_pci_types_register(&virtio_scsi_pci_info);
 112}
 113
 114type_init(virtio_scsi_pci_register)
 115