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