LXR qemu/tests/libqos/virtio-blk.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 "standard-headers/linux/virtio_blk.h"
  23#include "libqos/qgraph.h"
  24#include "libqos/virtio-blk.h"
  25
  26#define PCI_SLOT                0x04
  27#define PCI_FN                  0x00
  28
  29/* virtio-blk-device */
  30static void *qvirtio_blk_get_driver(QVirtioBlk *v_blk,
  31                                    const char *interface)
  32{
  33    if (!g_strcmp0(interface, "virtio-blk")) {
  34        return v_blk;
  35    }
  36    if (!g_strcmp0(interface, "virtio")) {
  37        return v_blk->vdev;
  38    }
  39
  40    fprintf(stderr, "%s not present in virtio-blk-device\n", interface);
  41    g_assert_not_reached();
  42}
  43
  44static void *qvirtio_blk_device_get_driver(void *object,
  45                                           const char *interface)
  46{
  47    QVirtioBlkDevice *v_blk = object;
  48    return qvirtio_blk_get_driver(&v_blk->blk, interface);
  49}
  50
  51static void *virtio_blk_device_create(void *virtio_dev,
  52                                      QGuestAllocator *t_alloc,
  53                                      void *addr)
  54{
  55    QVirtioBlkDevice *virtio_blk = g_new0(QVirtioBlkDevice, 1);
  56    QVirtioBlk *interface = &virtio_blk->blk;
  57
  58    interface->vdev = virtio_dev;
  59
  60    virtio_blk->obj.get_driver = qvirtio_blk_device_get_driver;
  61
  62    return &virtio_blk->obj;
  63}
  64
  65/* virtio-blk-pci */
  66static void *qvirtio_blk_pci_get_driver(void *object, const char *interface)
  67{
  68    QVirtioBlkPCI *v_blk = object;
  69    if (!g_strcmp0(interface, "pci-device")) {
  70        return v_blk->pci_vdev.pdev;
  71    }
  72    return qvirtio_blk_get_driver(&v_blk->blk, interface);
  73}
  74
  75static void *virtio_blk_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
  76                                      void *addr)
  77{
  78    QVirtioBlkPCI *virtio_blk = g_new0(QVirtioBlkPCI, 1);
  79    QVirtioBlk *interface = &virtio_blk->blk;
  80    QOSGraphObject *obj = &virtio_blk->pci_vdev.obj;
  81
  82    virtio_pci_init(&virtio_blk->pci_vdev, pci_bus, addr);
  83    interface->vdev = &virtio_blk->pci_vdev.vdev;
  84
  85    g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_BLOCK);
  86
  87    obj->get_driver = qvirtio_blk_pci_get_driver;
  88
  89    return obj;
  90}
  91
  92static void virtio_blk_register_nodes(void)
  93{
  94    /* FIXME: every test using these two nodes needs to setup a
  95     * -drive,id=drive0 otherwise QEMU is not going to start.
  96     * Therefore, we do not include "produces" edge for virtio
  97     * and pci-device yet.
  98    */
  99
 100    char *arg = g_strdup_printf("id=drv0,drive=drive0,addr=%x.%x",
 101                                PCI_SLOT, PCI_FN);
 102
 103    QPCIAddress addr = {
 104        .devfn = QPCI_DEVFN(PCI_SLOT, PCI_FN),
 105    };
 106
 107    QOSGraphEdgeOptions opts = { };
 108
 109    /* virtio-blk-device */
 110    opts.extra_device_opts = "drive=drive0";
 111    qos_node_create_driver("virtio-blk-device", virtio_blk_device_create);
 112    qos_node_consumes("virtio-blk-device", "virtio-bus", &opts);
 113    qos_node_produces("virtio-blk-device", "virtio-blk");
 114
 115    /* virtio-blk-pci */
 116    opts.extra_device_opts = arg;
 117    add_qpci_address(&opts, &addr);
 118    qos_node_create_driver("virtio-blk-pci", virtio_blk_pci_create);
 119    qos_node_consumes("virtio-blk-pci", "pci-bus", &opts);
 120    qos_node_produces("virtio-blk-pci", "virtio-blk");
 121
 122    g_free(arg);
 123}
 124
 125libqos_init(virtio_blk_register_nodes);
 126