tests/qtest/libqos/virtio-iommu.c

   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);