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     uint64_t features;
  36
  37     features = qvirtio_get_features(interface->vdev);
  38     features &= ~(QVIRTIO_F_BAD_FEATURE | (1ull << VIRTIO_RING_F_EVENT_IDX));
  39     qvirtio_set_features(interface->vdev, features);
  40
  41     interface->vq = qvirtqueue_setup(interface->vdev, alloc, 0);
  42     qvirtio_set_driver_ok(interface->vdev);
  43 }
  44
  45 /* virtio-9p-device */
  46 static void virtio_9p_device_destructor(QOSGraphObject *obj)
  47 {
  48     QVirtio9PDevice *v_9p = (QVirtio9PDevice *) obj;
  49     QVirtio9P *v9p = &v_9p->v9p;
  50
  51     virtio_9p_cleanup(v9p);
  52 }
  53
  54 static void virtio_9p_device_start_hw(QOSGraphObject *obj)
  55 {
  56     QVirtio9PDevice *v_9p = (QVirtio9PDevice *) obj;
  57     QVirtio9P *v9p = &v_9p->v9p;
  58
  59     virtio_9p_setup(v9p);
  60 }
  61
  62 static void *virtio_9p_get_driver(QVirtio9P *v_9p,
  63                                          const char *interface)
  64 {
  65     if (!g_strcmp0(interface, "virtio-9p")) {
  66         return v_9p;
  67     }
  68     if (!g_strcmp0(interface, "virtio")) {
  69         return v_9p->vdev;
  70     }
  71
  72     fprintf(stderr, "%s not present in virtio-9p-device\n", interface);
  73     g_assert_not_reached();
  74 }
  75
  76 static void *virtio_9p_device_get_driver(void *object, const char *interface)
  77 {
  78     QVirtio9PDevice *v_9p = object;
  79     return virtio_9p_get_driver(&v_9p->v9p, interface);
  80 }
  81
  82 static void *virtio_9p_device_create(void *virtio_dev,
  83                                      QGuestAllocator *t_alloc,
  84                                      void *addr)
  85 {
  86     QVirtio9PDevice *virtio_device = g_new0(QVirtio9PDevice, 1);
  87     QVirtio9P *interface = &virtio_device->v9p;
  88
  89     interface->vdev = virtio_dev;
  90     alloc = t_alloc;
  91
  92     virtio_device->obj.destructor = virtio_9p_device_destructor;
  93     virtio_device->obj.get_driver = virtio_9p_device_get_driver;
  94     virtio_device->obj.start_hw = virtio_9p_device_start_hw;
  95
  96     return &virtio_device->obj;
  97 }
  98
  99 /* virtio-9p-pci */
 100 static void virtio_9p_pci_destructor(QOSGraphObject *obj)
 101 {
 102     QVirtio9PPCI *v9_pci = (QVirtio9PPCI *) obj;
 103     QVirtio9P *interface = &v9_pci->v9p;
 104     QOSGraphObject *pci_vobj =  &v9_pci->pci_vdev.obj;
 105
 106     virtio_9p_cleanup(interface);
 107     qvirtio_pci_destructor(pci_vobj);
 108 }
 109
 110 static void virtio_9p_pci_start_hw(QOSGraphObject *obj)
 111 {
 112     QVirtio9PPCI *v9_pci = (QVirtio9PPCI *) obj;
 113     QVirtio9P *interface = &v9_pci->v9p;
 114     QOSGraphObject *pci_vobj =  &v9_pci->pci_vdev.obj;
 115
 116     qvirtio_pci_start_hw(pci_vobj);
 117     virtio_9p_setup(interface);
 118 }
 119
 120 static void *virtio_9p_pci_get_driver(void *object, const char *interface)
 121 {
 122     QVirtio9PPCI *v_9p = object;
 123     if (!g_strcmp0(interface, "pci-device")) {
 124         return v_9p->pci_vdev.pdev;
 125     }
 126     return virtio_9p_get_driver(&v_9p->v9p, interface);
 127 }
 128
 129 static void *virtio_9p_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
 130                                   void *addr)
 131 {
 132     QVirtio9PPCI *v9_pci = g_new0(QVirtio9PPCI, 1);
 133     QVirtio9P *interface = &v9_pci->v9p;
 134     QOSGraphObject *obj = &v9_pci->pci_vdev.obj;
 135
 136     virtio_pci_init(&v9_pci->pci_vdev, pci_bus, addr);
 137     interface->vdev = &v9_pci->pci_vdev.vdev;
 138     alloc = t_alloc;
 139
 140     g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_9P);
 141
 142     obj->destructor = virtio_9p_pci_destructor;
 143     obj->start_hw = virtio_9p_pci_start_hw;
 144     obj->get_driver = virtio_9p_pci_get_driver;
 145
 146     return obj;
 147 }
 148
 149 static void virtio_9p_register_nodes(void)
 150 {
 151     const char *str_simple = "fsdev=fsdev0,mount_tag=" MOUNT_TAG;
 152     const char *str_addr = "fsdev=fsdev0,addr=04.0,mount_tag=" MOUNT_TAG;
 153
 154     QPCIAddress addr = {
 155         .devfn = QPCI_DEVFN(4, 0),
 156     };
 157
 158     QOSGraphEdgeOptions opts = {
 159         .before_cmd_line = "-fsdev synth,id=fsdev0",
 160     };
 161
 162     /* virtio-9p-device */
 163     opts.extra_device_opts = str_simple,
 164     qos_node_create_driver("virtio-9p-device", virtio_9p_device_create);
 165     qos_node_consumes("virtio-9p-device", "virtio-bus", &opts);
 166     qos_node_produces("virtio-9p-device", "virtio");
 167     qos_node_produces("virtio-9p-device", "virtio-9p");
 168
 169     /* virtio-9p-pci */
 170     opts.extra_device_opts = str_addr;
 171     add_qpci_address(&opts, &addr);
 172     qos_node_create_driver("virtio-9p-pci", virtio_9p_pci_create);
 173     qos_node_consumes("virtio-9p-pci", "pci-bus", &opts);
 174     qos_node_produces("virtio-9p-pci", "pci-device");
 175     qos_node_produces("virtio-9p-pci", "virtio");
 176     qos_node_produces("virtio-9p-pci", "virtio-9p");
 177
 178 }
 179
 180 libqos_init(virtio_9p_register_nodes);