LXR qemu/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
  21static QGuestAllocator *alloc;
  22
  23/* virtio-iommu-device */
  24static 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
  38static void virtio_iommu_cleanup(QVirtioIOMMU *interface)
  39{
  40    qvirtqueue_cleanup(interface->vdev->bus, interface->vq, alloc);
  41}
  42
  43static 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 */
  59static 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
  68static 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
  78static 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
  89static 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
 107static 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
 126libqos_init(virtio_iommu_register_nodes);
 127