LXR qemu/hw/virtio/vdpa-dev-pci.c

   1/*
   2 * Vhost Vdpa Device PCI Bindings
   3 *
   4 * Copyright (c) Huawei Technologies Co., Ltd. 2022. All Rights Reserved.
   5 *
   6 * Authors:
   7 *   Longpeng <longpeng2@huawei.com>
   8 *
   9 * Largely based on the "vhost-user-blk-pci.c" and "vhost-user-blk.c"
  10 * implemented by:
  11 *   Changpeng Liu <changpeng.liu@intel.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#include "qemu/osdep.h"
  17#include <sys/ioctl.h>
  18#include <linux/vhost.h>
  19#include "hw/virtio/virtio.h"
  20#include "hw/virtio/vdpa-dev.h"
  21#include "hw/pci/pci.h"
  22#include "hw/qdev-properties.h"
  23#include "qapi/error.h"
  24#include "qemu/error-report.h"
  25#include "qemu/module.h"
  26#include "hw/virtio/virtio-pci.h"
  27#include "qom/object.h"
  28
  29
  30typedef struct VhostVdpaDevicePCI VhostVdpaDevicePCI;
  31
  32#define TYPE_VHOST_VDPA_DEVICE_PCI "vhost-vdpa-device-pci-base"
  33DECLARE_INSTANCE_CHECKER(VhostVdpaDevicePCI, VHOST_VDPA_DEVICE_PCI,
  34                         TYPE_VHOST_VDPA_DEVICE_PCI)
  35
  36struct VhostVdpaDevicePCI {
  37    VirtIOPCIProxy parent_obj;
  38    VhostVdpaDevice vdev;
  39};
  40
  41static void vhost_vdpa_device_pci_instance_init(Object *obj)
  42{
  43    VhostVdpaDevicePCI *dev = VHOST_VDPA_DEVICE_PCI(obj);
  44
  45    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  46                                TYPE_VHOST_VDPA_DEVICE);
  47    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  48                              "bootindex");
  49}
  50
  51static Property vhost_vdpa_device_pci_properties[] = {
  52    DEFINE_PROP_END_OF_LIST(),
  53};
  54
  55static int vhost_vdpa_device_pci_post_init(VhostVdpaDevice *v, Error **errp)
  56{
  57    VhostVdpaDevicePCI *dev = container_of(v, VhostVdpaDevicePCI, vdev);
  58    VirtIOPCIProxy *vpci_dev = &dev->parent_obj;
  59
  60    vpci_dev->class_code = virtio_pci_get_class_id(v->vdev_id);
  61    vpci_dev->trans_devid = virtio_pci_get_trans_devid(v->vdev_id);
  62    /* one for config vector */
  63    vpci_dev->nvectors = v->num_queues + 1;
  64
  65    return 0;
  66}
  67
  68static void
  69vhost_vdpa_device_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  70{
  71    VhostVdpaDevicePCI *dev = VHOST_VDPA_DEVICE_PCI(vpci_dev);
  72
  73    dev->vdev.post_init = vhost_vdpa_device_pci_post_init;
  74    qdev_realize(DEVICE(&dev->vdev), BUS(&vpci_dev->bus), errp);
  75}
  76
  77static void vhost_vdpa_device_pci_class_init(ObjectClass *klass, void *data)
  78{
  79    DeviceClass *dc = DEVICE_CLASS(klass);
  80    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  81
  82    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  83    device_class_set_props(dc, vhost_vdpa_device_pci_properties);
  84    k->realize = vhost_vdpa_device_pci_realize;
  85}
  86
  87static const VirtioPCIDeviceTypeInfo vhost_vdpa_device_pci_info = {
  88    .base_name               = TYPE_VHOST_VDPA_DEVICE_PCI,
  89    .generic_name            = "vhost-vdpa-device-pci",
  90    .transitional_name       = "vhost-vdpa-device-pci-transitional",
  91    .non_transitional_name   = "vhost-vdpa-device-pci-non-transitional",
  92    .instance_size  = sizeof(VhostVdpaDevicePCI),
  93    .instance_init  = vhost_vdpa_device_pci_instance_init,
  94    .class_init     = vhost_vdpa_device_pci_class_init,
  95};
  96
  97static void vhost_vdpa_device_pci_register(void)
  98{
  99    virtio_pci_types_register(&vhost_vdpa_device_pci_info);
 100}
 101
 102type_init(vhost_vdpa_device_pci_register);
 103