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

   1/*
   2 * Vhost user blk PCI Bindings
   3 *
   4 * Copyright(C) 2017 Intel Corporation.
   5 *
   6 * Authors:
   7 *  Changpeng Liu <changpeng.liu@intel.com>
   8 *
   9 * Largely based on the "vhost-user-scsi.c" and "vhost-scsi.c" implemented by:
  10 * Felipe Franciosi <felipe@nutanix.com>
  11 * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
  12 * Nicholas Bellinger <nab@risingtidesystems.com>
  13 *
  14 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  15 * See the COPYING.LIB file in the top-level directory.
  16 *
  17 */
  18
  19#include "qemu/osdep.h"
  20
  21#include "standard-headers/linux/virtio_pci.h"
  22#include "hw/virtio/virtio.h"
  23#include "hw/virtio/vhost-user-blk.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 "virtio-pci.h"
  30#include "qom/object.h"
  31
  32typedef struct VHostUserBlkPCI VHostUserBlkPCI;
  33
  34/*
  35 * vhost-user-blk-pci: This extends VirtioPCIProxy.
  36 */
  37#define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base"
  38DECLARE_INSTANCE_CHECKER(VHostUserBlkPCI, VHOST_USER_BLK_PCI,
  39                         TYPE_VHOST_USER_BLK_PCI)
  40
  41struct VHostUserBlkPCI {
  42    VirtIOPCIProxy parent_obj;
  43    VHostUserBlk vdev;
  44};
  45
  46static Property vhost_user_blk_pci_properties[] = {
  47    DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  48    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  49                       DEV_NVECTORS_UNSPECIFIED),
  50    DEFINE_PROP_END_OF_LIST(),
  51};
  52
  53static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  54{
  55    VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev);
  56    DeviceState *vdev = DEVICE(&dev->vdev);
  57
  58    if (dev->vdev.num_queues == VHOST_USER_BLK_AUTO_NUM_QUEUES) {
  59        dev->vdev.num_queues = virtio_pci_optimal_num_queues(0);
  60    }
  61
  62    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  63        vpci_dev->nvectors = dev->vdev.num_queues + 1;
  64    }
  65
  66    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  67}
  68
  69static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data)
  70{
  71    DeviceClass *dc = DEVICE_CLASS(klass);
  72    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  73    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  74
  75    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  76    device_class_set_props(dc, vhost_user_blk_pci_properties);
  77    k->realize = vhost_user_blk_pci_realize;
  78    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  79    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
  80    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  81    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  82}
  83
  84static void vhost_user_blk_pci_instance_init(Object *obj)
  85{
  86    VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj);
  87
  88    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  89                                TYPE_VHOST_USER_BLK);
  90    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  91                              "bootindex");
  92}
  93
  94static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = {
  95    .base_name               = TYPE_VHOST_USER_BLK_PCI,
  96    .generic_name            = "vhost-user-blk-pci",
  97    .transitional_name       = "vhost-user-blk-pci-transitional",
  98    .non_transitional_name   = "vhost-user-blk-pci-non-transitional",
  99    .instance_size  = sizeof(VHostUserBlkPCI),
 100    .instance_init  = vhost_user_blk_pci_instance_init,
 101    .class_init     = vhost_user_blk_pci_class_init,
 102};
 103
 104static void vhost_user_blk_pci_register(void)
 105{
 106    virtio_pci_types_register(&vhost_user_blk_pci_info);
 107}
 108
 109type_init(vhost_user_blk_pci_register)
 110