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#include "qom/object.h"
  35
  36typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
  37
  38#define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
  39DECLARE_INSTANCE_CHECKER(VHostUserSCSIPCI, VHOST_USER_SCSI_PCI,
  40                         TYPE_VHOST_USER_SCSI_PCI)
  41
  42struct VHostUserSCSIPCI {
  43    VirtIOPCIProxy parent_obj;
  44    VHostUserSCSI vdev;
  45};
  46
  47static Property vhost_user_scsi_pci_properties[] = {
  48    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  49                       DEV_NVECTORS_UNSPECIFIED),
  50    DEFINE_PROP_END_OF_LIST(),
  51};
  52
  53static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  54{
  55    VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
  56    DeviceState *vdev = DEVICE(&dev->vdev);
  57    VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf;
  58
  59    if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
  60        conf->num_queues =
  61            virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED);
  62    }
  63
  64    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  65        vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1;
  66    }
  67
  68    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  69}
  70
  71static void vhost_user_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    k->realize = vhost_user_scsi_pci_realize;
  77    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  78    device_class_set_props(dc, vhost_user_scsi_pci_properties);
  79    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  80    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  81    pcidev_k->revision = 0x00;
  82    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  83}
  84
  85static void vhost_user_scsi_pci_instance_init(Object *obj)
  86{
  87    VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
  88
  89    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  90                                TYPE_VHOST_USER_SCSI);
  91    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  92                              "bootindex");
  93}
  94
  95static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = {
  96    .base_name             = TYPE_VHOST_USER_SCSI_PCI,
  97    .generic_name          = "vhost-user-scsi-pci",
  98    .transitional_name     = "vhost-user-scsi-pci-transitional",
  99    .non_transitional_name = "vhost-user-scsi-pci-non-transitional",
 100    .instance_size = sizeof(VHostUserSCSIPCI),
 101    .instance_init = vhost_user_scsi_pci_instance_init,
 102    .class_init    = vhost_user_scsi_pci_class_init,
 103};
 104
 105static void vhost_user_scsi_pci_register(void)
 106{
 107    virtio_pci_types_register(&vhost_user_scsi_pci_info);
 108}
 109
 110type_init(vhost_user_scsi_pci_register)
 111