tests/libqos/virtio-net.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 "libqos/qgraph.h"
  22 #include "libqos/virtio-net.h"
  23 #include "hw/virtio/virtio-net.h"
  24
  25
  26 static QGuestAllocator *alloc;
  27
  28 static void virtio_net_cleanup(QVirtioNet *interface)
  29 {
  30     int i;
  31
  32     for (i = 0; i < interface->n_queues; i++) {
  33         qvirtqueue_cleanup(interface->vdev->bus, interface->queues[i], alloc);
  34     }
  35     g_free(interface->queues);
  36 }
  37
  38 static void virtio_net_setup(QVirtioNet *interface)
  39 {
  40     QVirtioDevice *vdev = interface->vdev;
  41     uint64_t features;
  42     int i;
  43
  44     features = qvirtio_get_features(vdev);
  45     features &= ~(QVIRTIO_F_BAD_FEATURE |
  46                   (1u << VIRTIO_RING_F_INDIRECT_DESC) |
  47                   (1u << VIRTIO_RING_F_EVENT_IDX));
  48     qvirtio_set_features(vdev, features);
  49
  50     if (features & (1u << VIRTIO_NET_F_MQ)) {
  51         interface->n_queues = qvirtio_config_readw(vdev, 8) * 2;
  52     } else {
  53         interface->n_queues = 2;
  54     }
  55
  56     interface->queues = g_new(QVirtQueue *, interface->n_queues);
  57     for (i = 0; i < interface->n_queues; i++) {
  58         interface->queues[i] = qvirtqueue_setup(vdev, alloc, i);
  59     }
  60     qvirtio_set_driver_ok(vdev);
  61 }
  62
  63 /* virtio-net-device */
  64 static void qvirtio_net_device_destructor(QOSGraphObject *obj)
  65 {
  66     QVirtioNetDevice *v_net = (QVirtioNetDevice *) obj;
  67     virtio_net_cleanup(&v_net->net);
  68 }
  69
  70 static void qvirtio_net_device_start_hw(QOSGraphObject *obj)
  71 {
  72     QVirtioNetDevice *v_net = (QVirtioNetDevice *) obj;
  73     QVirtioNet *interface = &v_net->net;
  74
  75     virtio_net_setup(interface);
  76 }
  77
  78 static void *qvirtio_net_get_driver(QVirtioNet *v_net,
  79                                     const char *interface)
  80 {
  81     if (!g_strcmp0(interface, "virtio-net")) {
  82         return v_net;
  83     }
  84     if (!g_strcmp0(interface, "virtio")) {
  85         return v_net->vdev;
  86     }
  87
  88     fprintf(stderr, "%s not present in virtio-net-device\n", interface);
  89     g_assert_not_reached();
  90 }
  91
  92 static void *qvirtio_net_device_get_driver(void *object,
  93                                            const char *interface)
  94 {
  95     QVirtioNetDevice *v_net = object;
  96     return qvirtio_net_get_driver(&v_net->net, interface);
  97 }
  98
  99 static void *virtio_net_device_create(void *virtio_dev,
 100                                           QGuestAllocator *t_alloc,
 101                                           void *addr)
 102 {
 103     QVirtioNetDevice *virtio_ndevice = g_new0(QVirtioNetDevice, 1);
 104     QVirtioNet *interface = &virtio_ndevice->net;
 105
 106     interface->vdev = virtio_dev;
 107     alloc = t_alloc;
 108
 109     virtio_ndevice->obj.destructor = qvirtio_net_device_destructor;
 110     virtio_ndevice->obj.get_driver = qvirtio_net_device_get_driver;
 111     virtio_ndevice->obj.start_hw = qvirtio_net_device_start_hw;
 112
 113     return &virtio_ndevice->obj;
 114 }
 115
 116 /* virtio-net-pci */
 117 static void qvirtio_net_pci_destructor(QOSGraphObject *obj)
 118 {
 119     QVirtioNetPCI *v_net = (QVirtioNetPCI *) obj;
 120     QVirtioNet *interface = &v_net->net;
 121     QOSGraphObject *pci_vobj =  &v_net->pci_vdev.obj;
 122
 123     virtio_net_cleanup(interface);
 124     qvirtio_pci_destructor(pci_vobj);
 125 }
 126
 127 static void qvirtio_net_pci_start_hw(QOSGraphObject *obj)
 128 {
 129     QVirtioNetPCI *v_net = (QVirtioNetPCI *) obj;
 130     QVirtioNet *interface = &v_net->net;
 131     QOSGraphObject *pci_vobj =  &v_net->pci_vdev.obj;
 132
 133     qvirtio_pci_start_hw(pci_vobj);
 134     virtio_net_setup(interface);
 135 }
 136
 137 static void *qvirtio_net_pci_get_driver(void *object,
 138                                             const char *interface)
 139 {
 140     QVirtioNetPCI *v_net = object;
 141     if (!g_strcmp0(interface, "pci-device")) {
 142         return v_net->pci_vdev.pdev;
 143     }
 144     return qvirtio_net_get_driver(&v_net->net, interface);
 145 }
 146
 147 static void *virtio_net_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
 148                                   void *addr)
 149 {
 150     QVirtioNetPCI *virtio_bpci = g_new0(QVirtioNetPCI, 1);
 151     QVirtioNet *interface = &virtio_bpci->net;
 152     QOSGraphObject *obj = &virtio_bpci->pci_vdev.obj;
 153
 154     virtio_pci_init(&virtio_bpci->pci_vdev, pci_bus, addr);
 155     interface->vdev = &virtio_bpci->pci_vdev.vdev;
 156     alloc = t_alloc;
 157
 158     g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_NET);
 159
 160     obj->destructor = qvirtio_net_pci_destructor;
 161     obj->start_hw = qvirtio_net_pci_start_hw;
 162     obj->get_driver = qvirtio_net_pci_get_driver;
 163
 164     return obj;
 165 }
 166
 167 static void virtio_net_register_nodes(void)
 168 {
 169     /* FIXME: every test using these nodes needs to setup a
 170      * -netdev socket,id=hs0 otherwise QEMU is not going to start.
 171      * Therefore, we do not include "produces" edge for virtio
 172      * and pci-device yet.
 173      */
 174     QPCIAddress addr = {
 175         .devfn = QPCI_DEVFN(4, 0),
 176     };
 177
 178     QOSGraphEdgeOptions opts = { };
 179
 180     /* virtio-net-device */
 181     opts.extra_device_opts = "netdev=hs0";
 182     qos_node_create_driver("virtio-net-device",
 183                             virtio_net_device_create);
 184     qos_node_consumes("virtio-net-device", "virtio-bus", &opts);
 185     qos_node_produces("virtio-net-device", "virtio-net");
 186
 187     /* virtio-net-pci */
 188     opts.extra_device_opts = "netdev=hs0,addr=04.0";
 189     add_qpci_address(&opts, &addr);
 190     qos_node_create_driver("virtio-net-pci", virtio_net_pci_create);
 191     qos_node_consumes("virtio-net-pci", "pci-bus", &opts);
 192     qos_node_produces("virtio-net-pci", "virtio-net");
 193 }
 194
 195 libqos_init(virtio_net_register_nodes);