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 "qemu/module.h"
  22#include "standard-headers/linux/virtio_ids.h"
  23#include "libqos/qgraph.h"
  24#include "libqos/virtio-scsi.h"
  25
  26/* virtio-scsi-device */
  27static void *qvirtio_scsi_get_driver(QVirtioSCSI *v_scsi,
  28                                     const char *interface)
  29{
  30    if (!g_strcmp0(interface, "virtio-scsi")) {
  31        return v_scsi;
  32    }
  33    if (!g_strcmp0(interface, "virtio")) {
  34        return v_scsi->vdev;
  35    }
  36
  37    fprintf(stderr, "%s not present in virtio-scsi-device\n", interface);
  38    g_assert_not_reached();
  39}
  40
  41static void *qvirtio_scsi_device_get_driver(void *object,
  42                                            const char *interface)
  43{
  44    QVirtioSCSIDevice *v_scsi = object;
  45    return qvirtio_scsi_get_driver(&v_scsi->scsi, interface);
  46}
  47
  48static void *virtio_scsi_device_create(void *virtio_dev,
  49                                          QGuestAllocator *t_alloc,
  50                                          void *addr)
  51{
  52    QVirtioSCSIDevice *virtio_bdevice = g_new0(QVirtioSCSIDevice, 1);
  53    QVirtioSCSI *interface = &virtio_bdevice->scsi;
  54
  55    interface->vdev = virtio_dev;
  56
  57    virtio_bdevice->obj.get_driver = qvirtio_scsi_device_get_driver;
  58
  59    return &virtio_bdevice->obj;
  60}
  61
  62/* virtio-scsi-pci */
  63static void *qvirtio_scsi_pci_get_driver(void *object,
  64                                         const char *interface)
  65{
  66    QVirtioSCSIPCI *v_scsi = object;
  67    if (!g_strcmp0(interface, "pci-device")) {
  68        return v_scsi->pci_vdev.pdev;
  69    }
  70    return qvirtio_scsi_get_driver(&v_scsi->scsi, interface);
  71}
  72
  73static void *virtio_scsi_pci_create(void *pci_bus,
  74                                    QGuestAllocator *t_alloc,
  75                                    void *addr)
  76{
  77    QVirtioSCSIPCI *virtio_spci = g_new0(QVirtioSCSIPCI, 1);
  78    QVirtioSCSI *interface = &virtio_spci->scsi;
  79    QOSGraphObject *obj = &virtio_spci->pci_vdev.obj;
  80
  81    virtio_pci_init(&virtio_spci->pci_vdev, pci_bus, addr);
  82    interface->vdev = &virtio_spci->pci_vdev.vdev;
  83
  84    g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_SCSI);
  85
  86    obj->get_driver = qvirtio_scsi_pci_get_driver;
  87
  88    return obj;
  89}
  90
  91static void virtio_scsi_register_nodes(void)
  92{
  93    QPCIAddress addr = {
  94        .devfn = QPCI_DEVFN(4, 0),
  95    };
  96
  97    QOSGraphEdgeOptions opts = {
  98        .before_cmd_line = "-drive id=drv0,if=none,file=null-co://,format=raw",
  99        .after_cmd_line = "-device scsi-hd,bus=vs0.0,drive=drv0",
 100    };
 101
 102    /* virtio-scsi-device */
 103    opts.extra_device_opts = "id=vs0";
 104    qos_node_create_driver("virtio-scsi-device",
 105                            virtio_scsi_device_create);
 106    qos_node_consumes("virtio-scsi-device", "virtio-bus", &opts);
 107    qos_node_produces("virtio-scsi-device", "virtio-scsi");
 108
 109    /* virtio-scsi-pci */
 110    opts.extra_device_opts = "id=vs0,addr=04.0";
 111    add_qpci_address(&opts, &addr);
 112    qos_node_create_driver("virtio-scsi-pci", virtio_scsi_pci_create);
 113    qos_node_consumes("virtio-scsi-pci", "pci-bus", &opts);
 114    qos_node_produces("virtio-scsi-pci", "pci-device");
 115    qos_node_produces("virtio-scsi-pci", "virtio-scsi");
 116}
 117
 118libqos_init(virtio_scsi_register_nodes);
 119