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 */
  27 static 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
  41 static 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
  48 static 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 */
  63 static 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
  73 static 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
  91 static 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
 118 libqos_init(virtio_scsi_register_nodes);