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
  31typedef struct VHostUserBlkPCI VHostUserBlkPCI;
  32
  33/*
  34 * vhost-user-blk-pci: This extends VirtioPCIProxy.
  35 */
  36#define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base"
  37#define VHOST_USER_BLK_PCI(obj) \
  38        OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI)
  39
  40struct VHostUserBlkPCI {
  41    VirtIOPCIProxy parent_obj;
  42    VHostUserBlk vdev;
  43};
  44
  45static Property vhost_user_blk_pci_properties[] = {
  46    DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  47    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  48                       DEV_NVECTORS_UNSPECIFIED),
  49    DEFINE_PROP_END_OF_LIST(),
  50};
  51
  52static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  53{
  54    VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev);
  55    DeviceState *vdev = DEVICE(&dev->vdev);
  56
  57    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  58        vpci_dev->nvectors = dev->vdev.num_queues + 1;
  59    }
  60
  61    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  62    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  63}
  64
  65static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data)
  66{
  67    DeviceClass *dc = DEVICE_CLASS(klass);
  68    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  69    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  70
  71    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  72    dc->props = vhost_user_blk_pci_properties;
  73    k->realize = vhost_user_blk_pci_realize;
  74    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  75    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
  76    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  77    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  78}
  79
  80static void vhost_user_blk_pci_instance_init(Object *obj)
  81{
  82    VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj);
  83
  84    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  85                                TYPE_VHOST_USER_BLK);
  86    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  87                              "bootindex", &error_abort);
  88}
  89
  90static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = {
  91    .base_name               = TYPE_VHOST_USER_BLK_PCI,
  92    .generic_name            = "vhost-user-blk-pci",
  93    .transitional_name       = "vhost-user-blk-pci-transitional",
  94    .non_transitional_name   = "vhost-user-blk-pci-non-transitional",
  95    .instance_size  = sizeof(VHostUserBlkPCI),
  96    .instance_init  = vhost_user_blk_pci_instance_init,
  97    .class_init     = vhost_user_blk_pci_class_init,
  98};
  99
 100static void vhost_user_blk_pci_register(void)
 101{
 102    virtio_pci_types_register(&vhost_user_blk_pci_info);
 103}
 104
 105type_init(vhost_user_blk_pci_register)
 106