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