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

   1/*
   2 * Vhost-user filesystem virtio device PCI glue
   3 *
   4 * Copyright 2018-2019 Red Hat, Inc.
   5 *
   6 * Authors:
   7 *  Dr. David Alan Gilbert <dgilbert@redhat.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2 or
  10 * (at your option) any later version.  See the COPYING file in the
  11 * top-level directory.
  12 */
  13
  14#include "qemu/osdep.h"
  15#include "hw/qdev-properties.h"
  16#include "hw/virtio/vhost-user-fs.h"
  17#include "virtio-pci.h"
  18#include "qom/object.h"
  19
  20struct VHostUserFSPCI {
  21    VirtIOPCIProxy parent_obj;
  22    VHostUserFS vdev;
  23};
  24
  25typedef struct VHostUserFSPCI VHostUserFSPCI;
  26
  27#define TYPE_VHOST_USER_FS_PCI "vhost-user-fs-pci-base"
  28
  29DECLARE_INSTANCE_CHECKER(VHostUserFSPCI, VHOST_USER_FS_PCI,
  30                         TYPE_VHOST_USER_FS_PCI)
  31
  32static Property vhost_user_fs_pci_properties[] = {
  33    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  34                       DEV_NVECTORS_UNSPECIFIED),
  35    DEFINE_PROP_END_OF_LIST(),
  36};
  37
  38static void vhost_user_fs_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  39{
  40    VHostUserFSPCI *dev = VHOST_USER_FS_PCI(vpci_dev);
  41    DeviceState *vdev = DEVICE(&dev->vdev);
  42
  43    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  44        /* Also reserve config change and hiprio queue vectors */
  45        vpci_dev->nvectors = dev->vdev.conf.num_request_queues + 2;
  46    }
  47
  48    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  49}
  50
  51static void vhost_user_fs_pci_class_init(ObjectClass *klass, void *data)
  52{
  53    DeviceClass *dc = DEVICE_CLASS(klass);
  54    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  55    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  56    k->realize = vhost_user_fs_pci_realize;
  57    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  58    device_class_set_props(dc, vhost_user_fs_pci_properties);
  59    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  60    pcidev_k->device_id = 0; /* Set by virtio-pci based on virtio id */
  61    pcidev_k->revision = 0x00;
  62    pcidev_k->class_id = PCI_CLASS_STORAGE_OTHER;
  63}
  64
  65static void vhost_user_fs_pci_instance_init(Object *obj)
  66{
  67    VHostUserFSPCI *dev = VHOST_USER_FS_PCI(obj);
  68
  69    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  70                                TYPE_VHOST_USER_FS);
  71    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  72                              "bootindex");
  73}
  74
  75static const VirtioPCIDeviceTypeInfo vhost_user_fs_pci_info = {
  76    .base_name             = TYPE_VHOST_USER_FS_PCI,
  77    .non_transitional_name = "vhost-user-fs-pci",
  78    .instance_size = sizeof(VHostUserFSPCI),
  79    .instance_init = vhost_user_fs_pci_instance_init,
  80    .class_init    = vhost_user_fs_pci_class_init,
  81};
  82
  83static void vhost_user_fs_pci_register(void)
  84{
  85    virtio_pci_types_register(&vhost_user_fs_pci_info);
  86}
  87
  88type_init(vhost_user_fs_pci_register);
  89