@samitouri / QOSamiQemu
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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/core/qdev-properties.h"
17 #include "hw/core/qdev-properties-system.h"
18 #include "qapi/error.h"
19 #include "hw/core/boards.h"
20 #include "hw/pci/pci_bus.h"
21 #include "qom/object.h"
22
23 typedef struct VirtIOIOMMUPCI VirtIOIOMMUPCI;
24
25 /*
26 * virtio-iommu-pci: This extends VirtioPCIProxy.
27 *
28 */
29 DECLARE_INSTANCE_CHECKER(VirtIOIOMMUPCI, VIRTIO_IOMMU_PCI,
30 TYPE_VIRTIO_IOMMU_PCI)
31
32 struct VirtIOIOMMUPCI {
33 VirtIOPCIProxy parent_obj;
34 VirtIOIOMMU vdev;
35 };
36
37 static const Property virtio_iommu_pci_properties[] = {
38 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
39 DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI,
40 vdev.nr_prop_resv_regions, vdev.prop_resv_regions,
41 qdev_prop_reserved_region, ReservedRegion),
42 };
43
44 static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
45 {
46 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev);
47 PCIBus *pbus = pci_get_bus(&vpci_dev->pci_dev);
48 DeviceState *vdev = DEVICE(&dev->vdev);
49 VirtIOIOMMU *s = VIRTIO_IOMMU(vdev);
50
51 if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) {
52 error_setg(errp, "Check your machine implements a hotplug handler "
53 "for the virtio-iommu-pci device");
54 return;
55 }
56 for (int i = 0; i < s->nr_prop_resv_regions; i++) {
57 if (s->prop_resv_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED &&
58 s->prop_resv_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) {
59 error_setg(errp, "reserved region %d has an invalid type", i);
60 error_append_hint(errp, "Valid values are 0 and 1\n");
61 return;
62 }
63 }
64 if (!pci_bus_is_root(pbus)) {
65 error_setg(errp, "virtio-iommu-pci must be plugged on the root bus");
66 return;
67 }
68
69 object_property_set_link(OBJECT(dev), "primary-bus",
70 OBJECT(pbus), &error_abort);
71
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, const 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->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 .generic_name = TYPE_VIRTIO_IOMMU_PCI,
99 .instance_size = sizeof(VirtIOIOMMUPCI),
100 .instance_init = virtio_iommu_pci_instance_init,
101 .class_init = virtio_iommu_pci_class_init,
102 };
103
104 static void virtio_iommu_pci_register(void)
105 {
106 virtio_pci_types_register(&virtio_iommu_pci_info);
107 }
108
109 type_init(virtio_iommu_pci_register)
110
111