tests/libqos/virtio-blk.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 "standard-headers/linux/virtio_blk.h"
  22 #include "libqos/qgraph.h"
  23 #include "libqos/virtio-blk.h"
  24
  25 #define PCI_SLOT                0x04
  26 #define PCI_FN                  0x00
  27
  28 /* virtio-blk-device */
  29 static void *qvirtio_blk_get_driver(QVirtioBlk *v_blk,
  30                                     const char *interface)
  31 {
  32     if (!g_strcmp0(interface, "virtio-blk")) {
  33         return v_blk;
  34     }
  35     if (!g_strcmp0(interface, "virtio")) {
  36         return v_blk->vdev;
  37     }
  38
  39     fprintf(stderr, "%s not present in virtio-blk-device\n", interface);
  40     g_assert_not_reached();
  41 }
  42
  43 static void *qvirtio_blk_device_get_driver(void *object,
  44                                            const char *interface)
  45 {
  46     QVirtioBlkDevice *v_blk = object;
  47     return qvirtio_blk_get_driver(&v_blk->blk, interface);
  48 }
  49
  50 static void *virtio_blk_device_create(void *virtio_dev,
  51                                       QGuestAllocator *t_alloc,
  52                                       void *addr)
  53 {
  54     QVirtioBlkDevice *virtio_blk = g_new0(QVirtioBlkDevice, 1);
  55     QVirtioBlk *interface = &virtio_blk->blk;
  56
  57     interface->vdev = virtio_dev;
  58
  59     virtio_blk->obj.get_driver = qvirtio_blk_device_get_driver;
  60
  61     return &virtio_blk->obj;
  62 }
  63
  64 /* virtio-blk-pci */
  65 static void *qvirtio_blk_pci_get_driver(void *object, const char *interface)
  66 {
  67     QVirtioBlkPCI *v_blk = object;
  68     if (!g_strcmp0(interface, "pci-device")) {
  69         return v_blk->pci_vdev.pdev;
  70     }
  71     return qvirtio_blk_get_driver(&v_blk->blk, interface);
  72 }
  73
  74 static void *virtio_blk_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
  75                                       void *addr)
  76 {
  77     QVirtioBlkPCI *virtio_blk = g_new0(QVirtioBlkPCI, 1);
  78     QVirtioBlk *interface = &virtio_blk->blk;
  79     QOSGraphObject *obj = &virtio_blk->pci_vdev.obj;
  80
  81     virtio_pci_init(&virtio_blk->pci_vdev, pci_bus, addr);
  82     interface->vdev = &virtio_blk->pci_vdev.vdev;
  83
  84     g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_BLOCK);
  85
  86     obj->get_driver = qvirtio_blk_pci_get_driver;
  87
  88     return obj;
  89 }
  90
  91 static void virtio_blk_register_nodes(void)
  92 {
  93     /* FIXME: every test using these two nodes needs to setup a
  94      * -drive,id=drive0 otherwise QEMU is not going to start.
  95      * Therefore, we do not include "produces" edge for virtio
  96      * and pci-device yet.
  97     */
  98
  99     char *arg = g_strdup_printf("id=drv0,drive=drive0,addr=%x.%x",
 100                                 PCI_SLOT, PCI_FN);
 101
 102     QPCIAddress addr = {
 103         .devfn = QPCI_DEVFN(PCI_SLOT, PCI_FN),
 104     };
 105
 106     QOSGraphEdgeOptions opts = { };
 107
 108     /* virtio-blk-device */
 109     opts.extra_device_opts = "drive=drive0";
 110     qos_node_create_driver("virtio-blk-device", virtio_blk_device_create);
 111     qos_node_consumes("virtio-blk-device", "virtio-bus", &opts);
 112     qos_node_produces("virtio-blk-device", "virtio-blk");
 113
 114     /* virtio-blk-pci */
 115     opts.extra_device_opts = arg;
 116     add_qpci_address(&opts, &addr);
 117     qos_node_create_driver("virtio-blk-pci", virtio_blk_pci_create);
 118     qos_node_consumes("virtio-blk-pci", "pci-bus", &opts);
 119     qos_node_produces("virtio-blk-pci", "virtio-blk");
 120
 121     g_free(arg);
 122 }
 123
 124 libqos_init(virtio_blk_register_nodes);