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_END_OF_LIST(),
  37 };
  38
  39 static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  40 {
  41     VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev);
  42     DeviceState *vdev = DEVICE(&dev->vdev);
  43
  44     if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) {
  45         MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
  46
  47         error_setg(errp,
  48                    "%s machine fails to create iommu-map device tree bindings",
  49                    mc->name);
  50         error_append_hint(errp,
  51                           "Check your machine implements a hotplug handler "
  52                           "for the virtio-iommu-pci device\n");
  53         error_append_hint(errp, "Check the guest is booted without FW or with "
  54                           "-no-acpi\n");
  55         return;
  56     }
  57     object_property_set_link(OBJECT(dev),
  58                              OBJECT(pci_get_bus(&vpci_dev->pci_dev)),
  59                              "primary-bus", errp);
  60     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  61 }
  62
  63 static void virtio_iommu_pci_class_init(ObjectClass *klass, void *data)
  64 {
  65     DeviceClass *dc = DEVICE_CLASS(klass);
  66     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  67     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  68     k->realize = virtio_iommu_pci_realize;
  69     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  70     device_class_set_props(dc, virtio_iommu_pci_properties);
  71     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  72     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_IOMMU;
  73     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  74     pcidev_k->class_id = PCI_CLASS_OTHERS;
  75     dc->hotpluggable = false;
  76 }
  77
  78 static void virtio_iommu_pci_instance_init(Object *obj)
  79 {
  80     VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj);
  81
  82     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  83                                 TYPE_VIRTIO_IOMMU);
  84 }
  85
  86 static const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = {
  87     .base_name             = TYPE_VIRTIO_IOMMU_PCI,
  88     .generic_name          = "virtio-iommu-pci",
  89     .transitional_name     = "virtio-iommu-pci-transitional",
  90     .non_transitional_name = "virtio-iommu-pci-non-transitional",
  91     .instance_size = sizeof(VirtIOIOMMUPCI),
  92     .instance_init = virtio_iommu_pci_instance_init,
  93     .class_init    = virtio_iommu_pci_class_init,
  94 };
  95
  96 static void virtio_iommu_pci_register(void)
  97 {
  98     virtio_pci_types_register(&virtio_iommu_pci_info);
  99 }
 100
 101 type_init(virtio_iommu_pci_register)
 102
 103