LXR qemu/tests/libqos/virtio-rng.c

   1/*
   2 * libqos driver framework
   3 *
   4 * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License version 2 as published by the Free Software Foundation.
   9 *
  10 * This library is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 * Lesser General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU Lesser General Public
  16 * License along with this library; if not, see <http://www.gnu.org/licenses/>
  17 */
  18
  19#include "qemu/osdep.h"
  20#include "libqtest.h"
  21#include "qemu/module.h"
  22#include "libqos/qgraph.h"
  23#include "libqos/virtio-rng.h"
  24
  25/* virtio-rng-device */
  26static void *qvirtio_rng_get_driver(QVirtioRng *v_rng,
  27                                    const char *interface)
  28{
  29    if (!g_strcmp0(interface, "virtio-rng")) {
  30        return v_rng;
  31    }
  32    if (!g_strcmp0(interface, "virtio")) {
  33        return v_rng->vdev;
  34    }
  35
  36    fprintf(stderr, "%s not present in virtio-rng-device\n", interface);
  37    g_assert_not_reached();
  38}
  39
  40static void *qvirtio_rng_device_get_driver(void *object,
  41                                           const char *interface)
  42{
  43    QVirtioRngDevice *v_rng = object;
  44    return qvirtio_rng_get_driver(&v_rng->rng, interface);
  45}
  46
  47static void *virtio_rng_device_create(void *virtio_dev,
  48                                      QGuestAllocator *t_alloc,
  49                                      void *addr)
  50{
  51    QVirtioRngDevice *virtio_rdevice = g_new0(QVirtioRngDevice, 1);
  52    QVirtioRng *interface = &virtio_rdevice->rng;
  53
  54    interface->vdev = virtio_dev;
  55
  56    virtio_rdevice->obj.get_driver = qvirtio_rng_device_get_driver;
  57
  58    return &virtio_rdevice->obj;
  59}
  60
  61/* virtio-rng-pci */
  62static void *qvirtio_rng_pci_get_driver(void *object, const char *interface)
  63{
  64    QVirtioRngPCI *v_rng = object;
  65    if (!g_strcmp0(interface, "pci-device")) {
  66        return v_rng->pci_vdev.pdev;
  67    }
  68    return qvirtio_rng_get_driver(&v_rng->rng, interface);
  69}
  70
  71static void *virtio_rng_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
  72                                   void *addr)
  73{
  74    QVirtioRngPCI *virtio_rpci = g_new0(QVirtioRngPCI, 1);
  75    QVirtioRng *interface = &virtio_rpci->rng;
  76    QOSGraphObject *obj = &virtio_rpci->pci_vdev.obj;
  77
  78    virtio_pci_init(&virtio_rpci->pci_vdev, pci_bus, addr);
  79    interface->vdev = &virtio_rpci->pci_vdev.vdev;
  80
  81    obj->get_driver = qvirtio_rng_pci_get_driver;
  82
  83    return obj;
  84}
  85
  86static void virtio_rng_register_nodes(void)
  87{
  88    QPCIAddress addr = {
  89        .devfn = QPCI_DEVFN(4, 0),
  90    };
  91
  92    QOSGraphEdgeOptions opts = {
  93        .extra_device_opts = "addr=04.0",
  94    };
  95
  96    /* virtio-rng-device */
  97    qos_node_create_driver("virtio-rng-device", virtio_rng_device_create);
  98    qos_node_consumes("virtio-rng-device", "virtio-bus", NULL);
  99    qos_node_produces("virtio-rng-device", "virtio");
 100    qos_node_produces("virtio-rng-device", "virtio-rng");
 101
 102    /* virtio-rng-pci */
 103    add_qpci_address(&opts, &addr);
 104    qos_node_create_driver("virtio-rng-pci", virtio_rng_pci_create);
 105    qos_node_consumes("virtio-rng-pci", "pci-bus", &opts);
 106    qos_node_produces("virtio-rng-pci", "pci-device");
 107    qos_node_produces("virtio-rng-pci", "virtio");
 108    qos_node_produces("virtio-rng-pci", "virtio-rng");
 109}
 110
 111libqos_init(virtio_rng_register_nodes);
 112