tests/libqos/virtio-9p.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/virtio-9p.h"
  24 #include "libqos/qgraph.h"
  25
  26 static QGuestAllocator *alloc;
  27
  28 static void virtio_9p_cleanup(QVirtio9P *interface)
  29 {
  30     qvirtqueue_cleanup(interface->vdev->bus, interface->vq, alloc);
  31 }
  32
  33 static void virtio_9p_setup(QVirtio9P *interface)
  34 {
  35     interface->vq = qvirtqueue_setup(interface->vdev, alloc, 0);
  36     qvirtio_set_driver_ok(interface->vdev);
  37 }
  38
  39 /* virtio-9p-device */
  40 static void virtio_9p_device_destructor(QOSGraphObject *obj)
  41 {
  42     QVirtio9PDevice *v_9p = (QVirtio9PDevice *) obj;
  43     QVirtio9P *v9p = &v_9p->v9p;
  44
  45     virtio_9p_cleanup(v9p);
  46 }
  47
  48 static void virtio_9p_device_start_hw(QOSGraphObject *obj)
  49 {
  50     QVirtio9PDevice *v_9p = (QVirtio9PDevice *) obj;
  51     QVirtio9P *v9p = &v_9p->v9p;
  52
  53     virtio_9p_setup(v9p);
  54 }
  55
  56 static void *virtio_9p_get_driver(QVirtio9P *v_9p,
  57                                          const char *interface)
  58 {
  59     if (!g_strcmp0(interface, "virtio-9p")) {
  60         return v_9p;
  61     }
  62     if (!g_strcmp0(interface, "virtio")) {
  63         return v_9p->vdev;
  64     }
  65
  66     fprintf(stderr, "%s not present in virtio-9p-device\n", interface);
  67     g_assert_not_reached();
  68 }
  69
  70 static void *virtio_9p_device_get_driver(void *object, const char *interface)
  71 {
  72     QVirtio9PDevice *v_9p = object;
  73     return virtio_9p_get_driver(&v_9p->v9p, interface);
  74 }
  75
  76 static void *virtio_9p_device_create(void *virtio_dev,
  77                                      QGuestAllocator *t_alloc,
  78                                      void *addr)
  79 {
  80     QVirtio9PDevice *virtio_device = g_new0(QVirtio9PDevice, 1);
  81     QVirtio9P *interface = &virtio_device->v9p;
  82
  83     interface->vdev = virtio_dev;
  84     alloc = t_alloc;
  85
  86     virtio_device->obj.destructor = virtio_9p_device_destructor;
  87     virtio_device->obj.get_driver = virtio_9p_device_get_driver;
  88     virtio_device->obj.start_hw = virtio_9p_device_start_hw;
  89
  90     return &virtio_device->obj;
  91 }
  92
  93 /* virtio-9p-pci */
  94 static void virtio_9p_pci_destructor(QOSGraphObject *obj)
  95 {
  96     QVirtio9PPCI *v9_pci = (QVirtio9PPCI *) obj;
  97     QVirtio9P *interface = &v9_pci->v9p;
  98     QOSGraphObject *pci_vobj =  &v9_pci->pci_vdev.obj;
  99
 100     virtio_9p_cleanup(interface);
 101     qvirtio_pci_destructor(pci_vobj);
 102 }
 103
 104 static void virtio_9p_pci_start_hw(QOSGraphObject *obj)
 105 {
 106     QVirtio9PPCI *v9_pci = (QVirtio9PPCI *) obj;
 107     QVirtio9P *interface = &v9_pci->v9p;
 108     QOSGraphObject *pci_vobj =  &v9_pci->pci_vdev.obj;
 109
 110     qvirtio_pci_start_hw(pci_vobj);
 111     virtio_9p_setup(interface);
 112 }
 113
 114 static void *virtio_9p_pci_get_driver(void *object, const char *interface)
 115 {
 116     QVirtio9PPCI *v_9p = object;
 117     if (!g_strcmp0(interface, "pci-device")) {
 118         return v_9p->pci_vdev.pdev;
 119     }
 120     return virtio_9p_get_driver(&v_9p->v9p, interface);
 121 }
 122
 123 static void *virtio_9p_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
 124                                   void *addr)
 125 {
 126     QVirtio9PPCI *v9_pci = g_new0(QVirtio9PPCI, 1);
 127     QVirtio9P *interface = &v9_pci->v9p;
 128     QOSGraphObject *obj = &v9_pci->pci_vdev.obj;
 129
 130     virtio_pci_init(&v9_pci->pci_vdev, pci_bus, addr);
 131     interface->vdev = &v9_pci->pci_vdev.vdev;
 132     alloc = t_alloc;
 133
 134     g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_9P);
 135
 136     obj->destructor = virtio_9p_pci_destructor;
 137     obj->start_hw = virtio_9p_pci_start_hw;
 138     obj->get_driver = virtio_9p_pci_get_driver;
 139
 140     return obj;
 141 }
 142
 143 static void virtio_9p_register_nodes(void)
 144 {
 145     const char *str_simple = "fsdev=fsdev0,mount_tag=" MOUNT_TAG;
 146     const char *str_addr = "fsdev=fsdev0,addr=04.0,mount_tag=" MOUNT_TAG;
 147
 148     QPCIAddress addr = {
 149         .devfn = QPCI_DEVFN(4, 0),
 150     };
 151
 152     QOSGraphEdgeOptions opts = {
 153         .before_cmd_line = "-fsdev synth,id=fsdev0",
 154     };
 155
 156     /* virtio-9p-device */
 157     opts.extra_device_opts = str_simple,
 158     qos_node_create_driver("virtio-9p-device", virtio_9p_device_create);
 159     qos_node_consumes("virtio-9p-device", "virtio-bus", &opts);
 160     qos_node_produces("virtio-9p-device", "virtio");
 161     qos_node_produces("virtio-9p-device", "virtio-9p");
 162
 163     /* virtio-9p-pci */
 164     opts.extra_device_opts = str_addr;
 165     add_qpci_address(&opts, &addr);
 166     qos_node_create_driver("virtio-9p-pci", virtio_9p_pci_create);
 167     qos_node_consumes("virtio-9p-pci", "pci-bus", &opts);
 168     qos_node_produces("virtio-9p-pci", "pci-device");
 169     qos_node_produces("virtio-9p-pci", "virtio");
 170     qos_node_produces("virtio-9p-pci", "virtio-9p");
 171
 172 }
 173
 174 libqos_init(virtio_9p_register_nodes);