@samitouri / QOSamiQemu
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1 /*
2 * libqos driver virtio-iommu-pci framework
3 *
4 * Copyright (c) 2021 Red Hat, Inc.
5 *
6 * Authors:
7 * Eric Auger <eric.auger@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or (at your
10 * option) any later version. See the COPYING file in the top-level directory.
11 *
12 */
13
14 #include "qemu/osdep.h"
15 #include "../libqtest.h"
16 #include "qemu/module.h"
17 #include "qgraph.h"
18 #include "virtio-iommu.h"
19 #include "hw/virtio/virtio-iommu.h"
20
21 static QGuestAllocator *alloc;
22
23 /* virtio-iommu-device */
24 static void *qvirtio_iommu_get_driver(QVirtioIOMMU *v_iommu,
25 const char *interface)
26 {
27 if (!g_strcmp0(interface, "virtio-iommu")) {
28 return v_iommu;
29 }
30 if (!g_strcmp0(interface, "virtio")) {
31 return v_iommu->vdev;
32 }
33
34 fprintf(stderr, "%s not present in virtio-iommu-device\n", interface);
35 g_assert_not_reached();
36 }
37
38 static void virtio_iommu_cleanup(QVirtioIOMMU *interface)
39 {
40 qvirtqueue_cleanup(interface->vdev->bus, interface->vq, alloc);
41 }
42
43 static void virtio_iommu_setup(QVirtioIOMMU *interface)
44 {
45 QVirtioDevice *vdev = interface->vdev;
46 uint64_t features;
47
48 features = qvirtio_get_features(vdev);
49 features &= ~(QVIRTIO_F_BAD_FEATURE |
50 (1ull << VIRTIO_RING_F_INDIRECT_DESC) |
51 (1ull << VIRTIO_RING_F_EVENT_IDX) |
52 (1ull << VIRTIO_IOMMU_F_BYPASS));
53 qvirtio_set_features(vdev, features);
54 interface->vq = qvirtqueue_setup(interface->vdev, alloc, 0);
55 qvirtio_set_driver_ok(interface->vdev);
56 }
57
58 /* virtio-iommu-pci */
59 static void *qvirtio_iommu_pci_get_driver(void *object, const char *interface)
60 {
61 QVirtioIOMMUPCI *v_iommu = object;
62 if (!g_strcmp0(interface, "pci-device")) {
63 return v_iommu->pci_vdev.pdev;
64 }
65 return qvirtio_iommu_get_driver(&v_iommu->iommu, interface);
66 }
67
68 static void qvirtio_iommu_pci_destructor(QOSGraphObject *obj)
69 {
70 QVirtioIOMMUPCI *iommu_pci = (QVirtioIOMMUPCI *) obj;
71 QVirtioIOMMU *interface = &iommu_pci->iommu;
72 QOSGraphObject *pci_vobj = &iommu_pci->pci_vdev.obj;
73
74 virtio_iommu_cleanup(interface);
75 qvirtio_pci_destructor(pci_vobj);
76 }
77
78 static void qvirtio_iommu_pci_start_hw(QOSGraphObject *obj)
79 {
80 QVirtioIOMMUPCI *iommu_pci = (QVirtioIOMMUPCI *) obj;
81 QVirtioIOMMU *interface = &iommu_pci->iommu;
82 QOSGraphObject *pci_vobj = &iommu_pci->pci_vdev.obj;
83
84 qvirtio_pci_start_hw(pci_vobj);
85 virtio_iommu_setup(interface);
86 }
87
88
89 static void *virtio_iommu_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
90 void *addr)
91 {
92 QVirtioIOMMUPCI *virtio_rpci = g_new0(QVirtioIOMMUPCI, 1);
93 QVirtioIOMMU *interface = &virtio_rpci->iommu;
94 QOSGraphObject *obj = &virtio_rpci->pci_vdev.obj;
95
96 virtio_pci_init(&virtio_rpci->pci_vdev, pci_bus, addr);
97 interface->vdev = &virtio_rpci->pci_vdev.vdev;
98 alloc = t_alloc;
99
100 obj->get_driver = qvirtio_iommu_pci_get_driver;
101 obj->start_hw = qvirtio_iommu_pci_start_hw;
102 obj->destructor = qvirtio_iommu_pci_destructor;
103
104 return obj;
105 }
106
107 static void virtio_iommu_register_nodes(void)
108 {
109 QPCIAddress addr = {
110 .devfn = QPCI_DEVFN(4, 0),
111 };
112
113 QOSGraphEdgeOptions opts = {
114 .extra_device_opts = "addr=04.0",
115 };
116
117 /* virtio-iommu-pci */
118 add_qpci_address(&opts, &addr);
119 qos_node_create_driver("virtio-iommu-pci", virtio_iommu_pci_create);
120 qos_node_consumes("virtio-iommu-pci", "pci-bus", &opts);
121 qos_node_produces("virtio-iommu-pci", "pci-device");
122 qos_node_produces("virtio-iommu-pci", "virtio");
123 qos_node_produces("virtio-iommu-pci", "virtio-iommu");
124 }
125
126 libqos_init(virtio_iommu_register_nodes);