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

   1/*
   2 * Vhost user scsi PCI Bindings
   3 *
   4 * Copyright (c) 2016 Nutanix Inc. All rights reserved.
   5 *
   6 * Author:
   7 *  Felipe Franciosi <felipe@nutanix.com>
   8 *
   9 * This work is largely based on the "vhost-scsi" implementation by:
  10 *  Stefan Hajnoczi    <stefanha@linux.vnet.ibm.com>
  11 *  Nicholas Bellinger <nab@risingtidesystems.com>
  12 *
  13 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  14 * See the COPYING.LIB file in the top-level directory.
  15 *
  16 */
  17
  18#include "qemu/osdep.h"
  19
  20#include "standard-headers/linux/virtio_pci.h"
  21#include "hw/virtio/vhost-user-scsi.h"
  22#include "hw/virtio/virtio.h"
  23#include "hw/virtio/virtio-scsi.h"
  24#include "hw/pci/pci.h"
  25#include "hw/qdev-properties.h"
  26#include "qapi/error.h"
  27#include "qemu/error-report.h"
  28#include "qemu/module.h"
  29#include "hw/pci/msi.h"
  30#include "hw/pci/msix.h"
  31#include "hw/loader.h"
  32#include "sysemu/kvm.h"
  33#include "virtio-pci.h"
  34
  35typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
  36
  37#define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
  38#define VHOST_USER_SCSI_PCI(obj) \
  39        OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI)
  40
  41struct VHostUserSCSIPCI {
  42    VirtIOPCIProxy parent_obj;
  43    VHostUserSCSI vdev;
  44};
  45
  46static Property vhost_user_scsi_pci_properties[] = {
  47    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  48                       DEV_NVECTORS_UNSPECIFIED),
  49    DEFINE_PROP_END_OF_LIST(),
  50};
  51
  52static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  53{
  54    VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
  55    DeviceState *vdev = DEVICE(&dev->vdev);
  56    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
  57
  58    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  59        vpci_dev->nvectors = vs->conf.num_queues + 3;
  60    }
  61
  62    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  63    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  64}
  65
  66static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data)
  67{
  68    DeviceClass *dc = DEVICE_CLASS(klass);
  69    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  70    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  71    k->realize = vhost_user_scsi_pci_realize;
  72    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  73    dc->props = vhost_user_scsi_pci_properties;
  74    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  75    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  76    pcidev_k->revision = 0x00;
  77    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  78}
  79
  80static void vhost_user_scsi_pci_instance_init(Object *obj)
  81{
  82    VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
  83
  84    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  85                                TYPE_VHOST_USER_SCSI);
  86    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  87                              "bootindex", &error_abort);
  88}
  89
  90static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = {
  91    .base_name             = TYPE_VHOST_USER_SCSI_PCI,
  92    .generic_name          = "vhost-user-scsi-pci",
  93    .transitional_name     = "vhost-user-scsi-pci-transitional",
  94    .non_transitional_name = "vhost-user-scsi-pci-non-transitional",
  95    .instance_size = sizeof(VHostUserSCSIPCI),
  96    .instance_init = vhost_user_scsi_pci_instance_init,
  97    .class_init    = vhost_user_scsi_pci_class_init,
  98};
  99
 100static void vhost_user_scsi_pci_register(void)
 101{
 102    virtio_pci_types_register(&vhost_user_scsi_pci_info);
 103}
 104
 105type_init(vhost_user_scsi_pci_register)
 106