LXR qemu/hw/virtio/virtio-iommu-pci.c

   1/*
   2 * Virtio IOMMU PCI Bindings
   3 *
   4 * Copyright (c) 2019 Red Hat, Inc.
   5 * Written by Eric Auger
   6 *
   7 *  This program is free software; you can redistribute it and/or modify
   8 *  it under the terms of the GNU General Public License version 2 or
   9 *  (at your option) any later version.
  10 */
  11
  12#include "qemu/osdep.h"
  13
  14#include "virtio-pci.h"
  15#include "hw/virtio/virtio-iommu.h"
  16#include "hw/qdev-properties.h"
  17#include "hw/qdev-properties-system.h"
  18#include "qapi/error.h"
  19#include "hw/boards.h"
  20#include "qom/object.h"
  21
  22typedef struct VirtIOIOMMUPCI VirtIOIOMMUPCI;
  23
  24/*
  25 * virtio-iommu-pci: This extends VirtioPCIProxy.
  26 *
  27 */
  28DECLARE_INSTANCE_CHECKER(VirtIOIOMMUPCI, VIRTIO_IOMMU_PCI,
  29                         TYPE_VIRTIO_IOMMU_PCI)
  30
  31struct VirtIOIOMMUPCI {
  32    VirtIOPCIProxy parent_obj;
  33    VirtIOIOMMU vdev;
  34};
  35
  36static Property virtio_iommu_pci_properties[] = {
  37    DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  38    DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI,
  39                      vdev.nb_reserved_regions, vdev.reserved_regions,
  40                      qdev_prop_reserved_region, ReservedRegion),
  41    DEFINE_PROP_END_OF_LIST(),
  42};
  43
  44static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  45{
  46    VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev);
  47    DeviceState *vdev = DEVICE(&dev->vdev);
  48    VirtIOIOMMU *s = VIRTIO_IOMMU(vdev);
  49
  50    if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) {
  51        MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
  52
  53        error_setg(errp,
  54                   "%s machine fails to create iommu-map device tree bindings",
  55                   mc->name);
  56        error_append_hint(errp,
  57                          "Check your machine implements a hotplug handler "
  58                          "for the virtio-iommu-pci device\n");
  59        error_append_hint(errp, "Check the guest is booted without FW or with "
  60                          "-no-acpi\n");
  61        return;
  62    }
  63    for (int i = 0; i < s->nb_reserved_regions; i++) {
  64        if (s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED &&
  65            s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) {
  66            error_setg(errp, "reserved region %d has an invalid type", i);
  67            error_append_hint(errp, "Valid values are 0 and 1\n");
  68        }
  69    }
  70    object_property_set_link(OBJECT(dev), "primary-bus",
  71                             OBJECT(pci_get_bus(&vpci_dev->pci_dev)),
  72                             &error_abort);
  73    virtio_pci_force_virtio_1(vpci_dev);
  74    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  75}
  76
  77static void virtio_iommu_pci_class_init(ObjectClass *klass, void *data)
  78{
  79    DeviceClass *dc = DEVICE_CLASS(klass);
  80    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  81    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  82    k->realize = virtio_iommu_pci_realize;
  83    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  84    device_class_set_props(dc, virtio_iommu_pci_properties);
  85    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  86    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_IOMMU;
  87    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  88    pcidev_k->class_id = PCI_CLASS_OTHERS;
  89    dc->hotpluggable = false;
  90}
  91
  92static void virtio_iommu_pci_instance_init(Object *obj)
  93{
  94    VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj);
  95
  96    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  97                                TYPE_VIRTIO_IOMMU);
  98}
  99
 100static const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = {
 101    .base_name             = TYPE_VIRTIO_IOMMU_PCI,
 102    .generic_name          = "virtio-iommu-pci",
 103    .non_transitional_name = "virtio-iommu-pci-non-transitional",
 104    .instance_size = sizeof(VirtIOIOMMUPCI),
 105    .instance_init = virtio_iommu_pci_instance_init,
 106    .class_init    = virtio_iommu_pci_class_init,
 107};
 108
 109static void virtio_iommu_pci_register(void)
 110{
 111    virtio_pci_types_register(&virtio_iommu_pci_info);
 112}
 113
 114type_init(virtio_iommu_pci_register)
 115
 116
 117