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/virtio/vhost-scsi.h"
  21#include "qapi/error.h"
  22#include "qemu/module.h"
  23#include "virtio-pci.h"
  24
  25typedef struct VHostSCSIPCI VHostSCSIPCI;
  26
  27/*
  28 * vhost-scsi-pci: This extends VirtioPCIProxy.
  29 */
  30#define TYPE_VHOST_SCSI_PCI "vhost-scsi-pci-base"
  31#define VHOST_SCSI_PCI(obj) \
  32        OBJECT_CHECK(VHostSCSIPCI, (obj), TYPE_VHOST_SCSI_PCI)
  33
  34struct VHostSCSIPCI {
  35    VirtIOPCIProxy parent_obj;
  36    VHostSCSI vdev;
  37};
  38
  39static Property vhost_scsi_pci_properties[] = {
  40    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  41                       DEV_NVECTORS_UNSPECIFIED),
  42    DEFINE_PROP_END_OF_LIST(),
  43};
  44
  45static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  46{
  47    VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
  48    DeviceState *vdev = DEVICE(&dev->vdev);
  49    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
  50
  51    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  52        vpci_dev->nvectors = vs->conf.num_queues + 3;
  53    }
  54
  55    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  56    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  57}
  58
  59static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
  60{
  61    DeviceClass *dc = DEVICE_CLASS(klass);
  62    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  63    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  64    k->realize = vhost_scsi_pci_realize;
  65    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  66    dc->props = vhost_scsi_pci_properties;
  67    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  68    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  69    pcidev_k->revision = 0x00;
  70    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  71}
  72
  73static void vhost_scsi_pci_instance_init(Object *obj)
  74{
  75    VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
  76
  77    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  78                                TYPE_VHOST_SCSI);
  79    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  80                              "bootindex", &error_abort);
  81}
  82
  83static const VirtioPCIDeviceTypeInfo vhost_scsi_pci_info = {
  84    .base_name             = TYPE_VHOST_SCSI_PCI,
  85    .generic_name          = "vhost-scsi-pci",
  86    .transitional_name     = "vhost-scsi-pci-transitional",
  87    .non_transitional_name = "vhost-scsi-pci-non-transitional",
  88    .instance_size = sizeof(VHostSCSIPCI),
  89    .instance_init = vhost_scsi_pci_instance_init,
  90    .class_init    = vhost_scsi_pci_class_init,
  91};
  92
  93static void vhost_scsi_pci_register(void)
  94{
  95    virtio_pci_types_register(&vhost_scsi_pci_info);
  96}
  97
  98type_init(vhost_scsi_pci_register)
  99