Update VERSION for v7.2.0-rc4
[qemu.git] / 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 "hw/virtio/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 "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 Property virtio_iommu_pci_properties[] = {
38 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
39 DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI,
40 vdev.nb_reserved_regions, vdev.reserved_regions,
41 qdev_prop_reserved_region, ReservedRegion),
42 DEFINE_PROP_END_OF_LIST(),
43 };
44
45 static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
46 {
47 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev);
48 PCIBus *pbus = pci_get_bus(&vpci_dev->pci_dev);
49 DeviceState *vdev = DEVICE(&dev->vdev);
50 VirtIOIOMMU *s = VIRTIO_IOMMU(vdev);
51
52 if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) {
53 error_setg(errp, "Check your machine implements a hotplug handler "
54 "for the virtio-iommu-pci device");
55 return;
56 }
57 for (int i = 0; i < s->nb_reserved_regions; i++) {
58 if (s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED &&
59 s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) {
60 error_setg(errp, "reserved region %d has an invalid type", i);
61 error_append_hint(errp, "Valid values are 0 and 1\n");
62 return;
63 }
64 }
65 if (!pci_bus_is_root(pbus)) {
66 error_setg(errp, "virtio-iommu-pci must be plugged on the root bus");
67 return;
68 }
69
70 object_property_set_link(OBJECT(dev), "primary-bus",
71 OBJECT(pbus), &error_abort);
72
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->revision = VIRTIO_PCI_ABI_VERSION;
86 pcidev_k->class_id = PCI_CLASS_OTHERS;
87 dc->hotpluggable = false;
88 }
89
90 static void virtio_iommu_pci_instance_init(Object *obj)
91 {
92 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj);
93
94 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
95 TYPE_VIRTIO_IOMMU);
96 }
97
98 static const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = {
99 .generic_name = TYPE_VIRTIO_IOMMU_PCI,
100 .instance_size = sizeof(VirtIOIOMMUPCI),
101 .instance_init = virtio_iommu_pci_instance_init,
102 .class_init = virtio_iommu_pci_class_init,
103 };
104
105 static void virtio_iommu_pci_register(void)
106 {
107 virtio_pci_types_register(&virtio_iommu_pci_info);
108 }
109
110 type_init(virtio_iommu_pci_register)
111
112