LXR qemu/tests/libqos/virtio-scsi.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 "standard-headers/linux/virtio_ids.h"
  22#include "libqos/qgraph.h"
  23#include "libqos/virtio-scsi.h"
  24
  25/* virtio-scsi-device */
  26static void *qvirtio_scsi_get_driver(QVirtioSCSI *v_scsi,
  27                                     const char *interface)
  28{
  29    if (!g_strcmp0(interface, "virtio-scsi")) {
  30        return v_scsi;
  31    }
  32    if (!g_strcmp0(interface, "virtio")) {
  33        return v_scsi->vdev;
  34    }
  35
  36    fprintf(stderr, "%s not present in virtio-scsi-device\n", interface);
  37    g_assert_not_reached();
  38}
  39
  40static void *qvirtio_scsi_device_get_driver(void *object,
  41                                            const char *interface)
  42{
  43    QVirtioSCSIDevice *v_scsi = object;
  44    return qvirtio_scsi_get_driver(&v_scsi->scsi, interface);
  45}
  46
  47static void *virtio_scsi_device_create(void *virtio_dev,
  48                                          QGuestAllocator *t_alloc,
  49                                          void *addr)
  50{
  51    QVirtioSCSIDevice *virtio_bdevice = g_new0(QVirtioSCSIDevice, 1);
  52    QVirtioSCSI *interface = &virtio_bdevice->scsi;
  53
  54    interface->vdev = virtio_dev;
  55
  56    virtio_bdevice->obj.get_driver = qvirtio_scsi_device_get_driver;
  57
  58    return &virtio_bdevice->obj;
  59}
  60
  61/* virtio-scsi-pci */
  62static void *qvirtio_scsi_pci_get_driver(void *object,
  63                                         const char *interface)
  64{
  65    QVirtioSCSIPCI *v_scsi = object;
  66    if (!g_strcmp0(interface, "pci-device")) {
  67        return v_scsi->pci_vdev.pdev;
  68    }
  69    return qvirtio_scsi_get_driver(&v_scsi->scsi, interface);
  70}
  71
  72static void *virtio_scsi_pci_create(void *pci_bus,
  73                                    QGuestAllocator *t_alloc,
  74                                    void *addr)
  75{
  76    QVirtioSCSIPCI *virtio_spci = g_new0(QVirtioSCSIPCI, 1);
  77    QVirtioSCSI *interface = &virtio_spci->scsi;
  78    QOSGraphObject *obj = &virtio_spci->pci_vdev.obj;
  79
  80    virtio_pci_init(&virtio_spci->pci_vdev, pci_bus, addr);
  81    interface->vdev = &virtio_spci->pci_vdev.vdev;
  82
  83    g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_SCSI);
  84
  85    obj->get_driver = qvirtio_scsi_pci_get_driver;
  86
  87    return obj;
  88}
  89
  90static void virtio_scsi_register_nodes(void)
  91{
  92    QPCIAddress addr = {
  93        .devfn = QPCI_DEVFN(4, 0),
  94    };
  95
  96    QOSGraphEdgeOptions opts = {
  97        .before_cmd_line = "-drive id=drv0,if=none,file=null-co://,format=raw",
  98        .after_cmd_line = "-device scsi-hd,bus=vs0.0,drive=drv0",
  99    };
 100
 101    /* virtio-scsi-device */
 102    opts.extra_device_opts = "id=vs0";
 103    qos_node_create_driver("virtio-scsi-device",
 104                            virtio_scsi_device_create);
 105    qos_node_consumes("virtio-scsi-device", "virtio-bus", &opts);
 106    qos_node_produces("virtio-scsi-device", "virtio-scsi");
 107
 108    /* virtio-scsi-pci */
 109    opts.extra_device_opts = "id=vs0,addr=04.0";
 110    add_qpci_address(&opts, &addr);
 111    qos_node_create_driver("virtio-scsi-pci", virtio_scsi_pci_create);
 112    qos_node_consumes("virtio-scsi-pci", "pci-bus", &opts);
 113    qos_node_produces("virtio-scsi-pci", "pci-device");
 114    qos_node_produces("virtio-scsi-pci", "virtio-scsi");
 115}
 116
 117libqos_init(virtio_scsi_register_nodes);
 118