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
  22 typedef struct VirtIOIOMMUPCI VirtIOIOMMUPCI;
  23
  24 /*
  25  * virtio-iommu-pci: This extends VirtioPCIProxy.
  26  *
  27  */
  28 DECLARE_INSTANCE_CHECKER(VirtIOIOMMUPCI, VIRTIO_IOMMU_PCI,
  29                          TYPE_VIRTIO_IOMMU_PCI)
  30
  31 struct VirtIOIOMMUPCI {
  32     VirtIOPCIProxy parent_obj;
  33     VirtIOIOMMU vdev;
  34 };
  35
  36 static 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
  44 static 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
  77 static 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
  92 static 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
 100 static 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
 109 static void virtio_iommu_pci_register(void)
 110 {
 111     virtio_pci_types_register(&virtio_iommu_pci_info);
 112 }
 113
 114 type_init(virtio_iommu_pci_register)
 115
 116