tests/qtest/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 2.1 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 "qgraph.h"
  23 #include "virtio-net.h"
  24 #include "hw/virtio/virtio-net.h"
  25
  26
  27 static QGuestAllocator *alloc;
  28
  29 static void virtio_net_cleanup(QVirtioNet *interface)
  30 {
  31     int i;
  32
  33     for (i = 0; i < interface->n_queues; i++) {
  34         qvirtqueue_cleanup(interface->vdev->bus, interface->queues[i], alloc);
  35     }
  36     g_free(interface->queues);
  37 }
  38
  39 static void virtio_net_setup(QVirtioNet *interface)
  40 {
  41     QVirtioDevice *vdev = interface->vdev;
  42     uint64_t features;
  43     int i;
  44
  45     features = qvirtio_get_features(vdev);
  46     features &= ~(QVIRTIO_F_BAD_FEATURE |
  47                   (1ull << VIRTIO_RING_F_INDIRECT_DESC) |
  48                   (1ull << VIRTIO_RING_F_EVENT_IDX));
  49     qvirtio_set_features(vdev, features);
  50
  51     if (features & (1ull << VIRTIO_NET_F_MQ)) {
  52         interface->n_queues = qvirtio_config_readw(vdev, 8) * 2;
  53     } else {
  54         interface->n_queues = 2;
  55     }
  56     interface->n_queues++; /* Account for the ctrl queue */
  57
  58     interface->queues = g_new(QVirtQueue *, interface->n_queues);
  59     for (i = 0; i < interface->n_queues; i++) {
  60         interface->queues[i] = qvirtqueue_setup(vdev, alloc, i);
  61     }
  62     qvirtio_set_driver_ok(vdev);
  63 }
  64
  65 /* virtio-net-device */
  66 static void qvirtio_net_device_destructor(QOSGraphObject *obj)
  67 {
  68     QVirtioNetDevice *v_net = (QVirtioNetDevice *) obj;
  69     virtio_net_cleanup(&v_net->net);
  70 }
  71
  72 static void qvirtio_net_device_start_hw(QOSGraphObject *obj)
  73 {
  74     QVirtioNetDevice *v_net = (QVirtioNetDevice *) obj;
  75     QVirtioNet *interface = &v_net->net;
  76
  77     virtio_net_setup(interface);
  78 }
  79
  80 static void *qvirtio_net_get_driver(QVirtioNet *v_net,
  81                                     const char *interface)
  82 {
  83     if (!g_strcmp0(interface, "virtio-net")) {
  84         return v_net;
  85     }
  86     if (!g_strcmp0(interface, "virtio")) {
  87         return v_net->vdev;
  88     }
  89
  90     fprintf(stderr, "%s not present in virtio-net-device\n", interface);
  91     g_assert_not_reached();
  92 }
  93
  94 static void *qvirtio_net_device_get_driver(void *object,
  95                                            const char *interface)
  96 {
  97     QVirtioNetDevice *v_net = object;
  98     return qvirtio_net_get_driver(&v_net->net, interface);
  99 }
 100
 101 static void *virtio_net_device_create(void *virtio_dev,
 102                                           QGuestAllocator *t_alloc,
 103                                           void *addr)
 104 {
 105     QVirtioNetDevice *virtio_ndevice = g_new0(QVirtioNetDevice, 1);
 106     QVirtioNet *interface = &virtio_ndevice->net;
 107
 108     interface->vdev = virtio_dev;
 109     alloc = t_alloc;
 110
 111     virtio_ndevice->obj.destructor = qvirtio_net_device_destructor;
 112     virtio_ndevice->obj.get_driver = qvirtio_net_device_get_driver;
 113     virtio_ndevice->obj.start_hw = qvirtio_net_device_start_hw;
 114
 115     return &virtio_ndevice->obj;
 116 }
 117
 118 /* virtio-net-pci */
 119 static void qvirtio_net_pci_destructor(QOSGraphObject *obj)
 120 {
 121     QVirtioNetPCI *v_net = (QVirtioNetPCI *) obj;
 122     QVirtioNet *interface = &v_net->net;
 123     QOSGraphObject *pci_vobj =  &v_net->pci_vdev.obj;
 124
 125     virtio_net_cleanup(interface);
 126     qvirtio_pci_destructor(pci_vobj);
 127 }
 128
 129 static void qvirtio_net_pci_start_hw(QOSGraphObject *obj)
 130 {
 131     QVirtioNetPCI *v_net = (QVirtioNetPCI *) obj;
 132     QVirtioNet *interface = &v_net->net;
 133     QOSGraphObject *pci_vobj =  &v_net->pci_vdev.obj;
 134
 135     qvirtio_pci_start_hw(pci_vobj);
 136     virtio_net_setup(interface);
 137 }
 138
 139 static void *qvirtio_net_pci_get_driver(void *object,
 140                                             const char *interface)
 141 {
 142     QVirtioNetPCI *v_net = object;
 143     if (!g_strcmp0(interface, "pci-device")) {
 144         return v_net->pci_vdev.pdev;
 145     }
 146     return qvirtio_net_get_driver(&v_net->net, interface);
 147 }
 148
 149 static void *virtio_net_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
 150                                   void *addr)
 151 {
 152     QVirtioNetPCI *virtio_bpci = g_new0(QVirtioNetPCI, 1);
 153     QVirtioNet *interface = &virtio_bpci->net;
 154     QOSGraphObject *obj = &virtio_bpci->pci_vdev.obj;
 155
 156     virtio_pci_init(&virtio_bpci->pci_vdev, pci_bus, addr);
 157     interface->vdev = &virtio_bpci->pci_vdev.vdev;
 158     alloc = t_alloc;
 159
 160     g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_NET);
 161
 162     obj->destructor = qvirtio_net_pci_destructor;
 163     obj->start_hw = qvirtio_net_pci_start_hw;
 164     obj->get_driver = qvirtio_net_pci_get_driver;
 165
 166     return obj;
 167 }
 168
 169 static void virtio_net_register_nodes(void)
 170 {
 171     /* FIXME: every test using these nodes needs to setup a
 172      * -netdev socket,id=hs0 otherwise QEMU is not going to start.
 173      * Therefore, we do not include "produces" edge for virtio
 174      * and pci-device yet.
 175      */
 176     QPCIAddress addr = {
 177         .devfn = QPCI_DEVFN(4, 0),
 178     };
 179
 180     QOSGraphEdgeOptions opts = { };
 181
 182     /* virtio-net-device */
 183     opts.extra_device_opts = "netdev=hs0";
 184     qos_node_create_driver("virtio-net-device",
 185                             virtio_net_device_create);
 186     qos_node_consumes("virtio-net-device", "virtio-bus", &opts);
 187     qos_node_produces("virtio-net-device", "virtio-net");
 188
 189     /* virtio-net-pci */
 190     opts.extra_device_opts = "netdev=hs0,addr=04.0";
 191     add_qpci_address(&opts, &addr);
 192     qos_node_create_driver("virtio-net-pci", virtio_net_pci_create);
 193     qos_node_consumes("virtio-net-pci", "pci-bus", &opts);
 194     qos_node_produces("virtio-net-pci", "virtio-net");
 195 }
 196
 197 libqos_init(virtio_net_register_nodes);