hw/virtio/vhost-user-device-pci.c

   1 /*
   2  * Vhost-user generic virtio device PCI glue
   3  *
   4  * Copyright (c) 2023 Linaro Ltd
   5  * Author: Alex Bennée <alex.bennee@linaro.org>
   6  *
   7  * SPDX-License-Identifier: GPL-2.0-or-later
   8  */
   9
  10 #include "qemu/osdep.h"
  11 #include "hw/qdev-properties.h"
  12 #include "hw/virtio/vhost-user-base.h"
  13 #include "hw/virtio/virtio-pci.h"
  14
  15 struct VHostUserDevicePCI {
  16     VirtIOPCIProxy parent_obj;
  17
  18     VHostUserBase vub;
  19 };
  20
  21 #define TYPE_VHOST_USER_DEVICE_PCI "vhost-user-device-pci-base"
  22
  23 OBJECT_DECLARE_SIMPLE_TYPE(VHostUserDevicePCI, VHOST_USER_DEVICE_PCI)
  24
  25 static void vhost_user_device_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  26 {
  27     VHostUserDevicePCI *dev = VHOST_USER_DEVICE_PCI(vpci_dev);
  28     DeviceState *vdev = DEVICE(&dev->vub);
  29
  30     vpci_dev->nvectors = 1;
  31     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  32 }
  33
  34 static void vhost_user_device_pci_class_init(ObjectClass *klass, void *data)
  35 {
  36     DeviceClass *dc = DEVICE_CLASS(klass);
  37     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  38     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  39
  40     /* Reason: stop users confusing themselves */
  41     dc->user_creatable = false;
  42
  43     k->realize = vhost_user_device_pci_realize;
  44     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
  45     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  46     pcidev_k->device_id = 0; /* Set by virtio-pci based on virtio id */
  47     pcidev_k->revision = 0x00;
  48     pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
  49 }
  50
  51 static void vhost_user_device_pci_instance_init(Object *obj)
  52 {
  53     VHostUserDevicePCI *dev = VHOST_USER_DEVICE_PCI(obj);
  54
  55     virtio_instance_init_common(obj, &dev->vub, sizeof(dev->vub),
  56                                 TYPE_VHOST_USER_DEVICE);
  57 }
  58
  59 static const VirtioPCIDeviceTypeInfo vhost_user_device_pci_info = {
  60     .base_name = TYPE_VHOST_USER_DEVICE_PCI,
  61     .non_transitional_name = "vhost-user-device-pci",
  62     .instance_size = sizeof(VHostUserDevicePCI),
  63     .instance_init = vhost_user_device_pci_instance_init,
  64     .class_init = vhost_user_device_pci_class_init,
  65 };
  66
  67 static void vhost_user_device_pci_register(void)
  68 {
  69     virtio_pci_types_register(&vhost_user_device_pci_info);
  70 }
  71
  72 type_init(vhost_user_device_pci_register);