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