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 "hw/virtio/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 "hw/pci/pci_bus.h"
  21#include "qom/object.h"
  22
  23typedef struct VirtIOIOMMUPCI VirtIOIOMMUPCI;
  24
  25/*
  26 * virtio-iommu-pci: This extends VirtioPCIProxy.
  27 *
  28 */
  29DECLARE_INSTANCE_CHECKER(VirtIOIOMMUPCI, VIRTIO_IOMMU_PCI,
  30                         TYPE_VIRTIO_IOMMU_PCI)
  31
  32struct VirtIOIOMMUPCI {
  33    VirtIOPCIProxy parent_obj;
  34    VirtIOIOMMU vdev;
  35};
  36
  37static Property virtio_iommu_pci_properties[] = {
  38    DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  39    DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI,
  40                      vdev.nb_reserved_regions, vdev.reserved_regions,
  41                      qdev_prop_reserved_region, ReservedRegion),
  42    DEFINE_PROP_END_OF_LIST(),
  43};
  44
  45static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  46{
  47    VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev);
  48    PCIBus *pbus = pci_get_bus(&vpci_dev->pci_dev);
  49    DeviceState *vdev = DEVICE(&dev->vdev);
  50    VirtIOIOMMU *s = VIRTIO_IOMMU(vdev);
  51
  52    if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) {
  53        error_setg(errp, "Check your machine implements a hotplug handler "
  54                         "for the virtio-iommu-pci device");
  55        return;
  56    }
  57    for (int i = 0; i < s->nb_reserved_regions; i++) {
  58        if (s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED &&
  59            s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) {
  60            error_setg(errp, "reserved region %d has an invalid type", i);
  61            error_append_hint(errp, "Valid values are 0 and 1\n");
  62            return;
  63        }
  64    }
  65    if (!pci_bus_is_root(pbus)) {
  66        error_setg(errp, "virtio-iommu-pci must be plugged on the root bus");
  67        return;
  68    }
  69
  70    object_property_set_link(OBJECT(dev), "primary-bus",
  71                             OBJECT(pbus), &error_abort);
  72
  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->revision = VIRTIO_PCI_ABI_VERSION;
  86    pcidev_k->class_id = PCI_CLASS_OTHERS;
  87    dc->hotpluggable = false;
  88}
  89
  90static void virtio_iommu_pci_instance_init(Object *obj)
  91{
  92    VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj);
  93
  94    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  95                                TYPE_VIRTIO_IOMMU);
  96}
  97
  98static const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = {
  99    .generic_name  = TYPE_VIRTIO_IOMMU_PCI,
 100    .instance_size = sizeof(VirtIOIOMMUPCI),
 101    .instance_init = virtio_iommu_pci_instance_init,
 102    .class_init    = virtio_iommu_pci_class_init,
 103};
 104
 105static void virtio_iommu_pci_register(void)
 106{
 107    virtio_pci_types_register(&virtio_iommu_pci_info);
 108}
 109
 110type_init(virtio_iommu_pci_register)
 111
 112
 113