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

   1/*
   2 * Vhost scsi PCI bindings
   3 *
   4 * Copyright IBM, Corp. 2011
   5 *
   6 * Authors:
   7 *  Stefan Hajnoczi   <stefanha@linux.vnet.ibm.com>
   8 *
   9 * Changes for QEMU mainline + tcm_vhost kernel upstream:
  10 *  Nicholas Bellinger <nab@risingtidesystems.com>
  11 *
  12 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  13 * See the COPYING.LIB file in the top-level directory.
  14 *
  15 */
  16
  17#include "qemu/osdep.h"
  18
  19#include "standard-headers/linux/virtio_pci.h"
  20#include "hw/qdev-properties.h"
  21#include "hw/virtio/vhost-scsi.h"
  22#include "qapi/error.h"
  23#include "qemu/module.h"
  24#include "virtio-pci.h"
  25
  26typedef struct VHostSCSIPCI VHostSCSIPCI;
  27
  28/*
  29 * vhost-scsi-pci: This extends VirtioPCIProxy.
  30 */
  31#define TYPE_VHOST_SCSI_PCI "vhost-scsi-pci-base"
  32#define VHOST_SCSI_PCI(obj) \
  33        OBJECT_CHECK(VHostSCSIPCI, (obj), TYPE_VHOST_SCSI_PCI)
  34
  35struct VHostSCSIPCI {
  36    VirtIOPCIProxy parent_obj;
  37    VHostSCSI vdev;
  38};
  39
  40static Property vhost_scsi_pci_properties[] = {
  41    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  42                       DEV_NVECTORS_UNSPECIFIED),
  43    DEFINE_PROP_END_OF_LIST(),
  44};
  45
  46static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  47{
  48    VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
  49    DeviceState *vdev = DEVICE(&dev->vdev);
  50    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
  51
  52    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  53        vpci_dev->nvectors = vs->conf.num_queues + 3;
  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 vhost_scsi_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    k->realize = vhost_scsi_pci_realize;
  66    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  67    dc->props = vhost_scsi_pci_properties;
  68    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  69    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  70    pcidev_k->revision = 0x00;
  71    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  72}
  73
  74static void vhost_scsi_pci_instance_init(Object *obj)
  75{
  76    VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
  77
  78    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  79                                TYPE_VHOST_SCSI);
  80    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  81                              "bootindex", &error_abort);
  82}
  83
  84static const VirtioPCIDeviceTypeInfo vhost_scsi_pci_info = {
  85    .base_name             = TYPE_VHOST_SCSI_PCI,
  86    .generic_name          = "vhost-scsi-pci",
  87    .transitional_name     = "vhost-scsi-pci-transitional",
  88    .non_transitional_name = "vhost-scsi-pci-non-transitional",
  89    .instance_size = sizeof(VHostSCSIPCI),
  90    .instance_init = vhost_scsi_pci_instance_init,
  91    .class_init    = vhost_scsi_pci_class_init,
  92};
  93
  94static void vhost_scsi_pci_register(void)
  95{
  96    virtio_pci_types_register(&vhost_scsi_pci_info);
  97}
  98
  99type_init(vhost_scsi_pci_register)
 100