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-rng.h" 23 24 /* virtio-rng-device */ 25 static void *qvirtio_rng_get_driver(QVirtioRng *v_rng, 26 const char *interface) 27 { 28 if (!g_strcmp0(interface, "virtio-rng")) { 29 return v_rng; 30 } 31 if (!g_strcmp0(interface, "virtio")) { 32 return v_rng->vdev; 33 } 34 35 fprintf(stderr, "%s not present in virtio-rng-device\n", interface); 36 g_assert_not_reached(); 37 } 38 39 static void *qvirtio_rng_device_get_driver(void *object, 40 const char *interface) 41 { 42 QVirtioRngDevice *v_rng = object; 43 return qvirtio_rng_get_driver(&v_rng->rng, interface); 44 } 45 46 static void *virtio_rng_device_create(void *virtio_dev, 47 QGuestAllocator *t_alloc, 48 void *addr) 49 { 50 QVirtioRngDevice *virtio_rdevice = g_new0(QVirtioRngDevice, 1); 51 QVirtioRng *interface = &virtio_rdevice->rng; 52 53 interface->vdev = virtio_dev; 54 55 virtio_rdevice->obj.get_driver = qvirtio_rng_device_get_driver; 56 57 return &virtio_rdevice->obj; 58 } 59 60 /* virtio-rng-pci */ 61 static void *qvirtio_rng_pci_get_driver(void *object, const char *interface) 62 { 63 QVirtioRngPCI *v_rng = object; 64 if (!g_strcmp0(interface, "pci-device")) { 65 return v_rng->pci_vdev.pdev; 66 } 67 return qvirtio_rng_get_driver(&v_rng->rng, interface); 68 } 69 70 static void *virtio_rng_pci_create(void *pci_bus, QGuestAllocator *t_alloc, 71 void *addr) 72 { 73 QVirtioRngPCI *virtio_rpci = g_new0(QVirtioRngPCI, 1); 74 QVirtioRng *interface = &virtio_rpci->rng; 75 QOSGraphObject *obj = &virtio_rpci->pci_vdev.obj; 76 77 virtio_pci_init(&virtio_rpci->pci_vdev, pci_bus, addr); 78 interface->vdev = &virtio_rpci->pci_vdev.vdev; 79 80 obj->get_driver = qvirtio_rng_pci_get_driver; 81 82 return obj; 83 } 84 85 static void virtio_rng_register_nodes(void) 86 { 87 QPCIAddress addr = { 88 .devfn = QPCI_DEVFN(4, 0), 89 }; 90 91 QOSGraphEdgeOptions opts = { 92 .extra_device_opts = "addr=04.0", 93 }; 94 95 /* virtio-rng-device */ 96 qos_node_create_driver("virtio-rng-device", virtio_rng_device_create); 97 qos_node_consumes("virtio-rng-device", "virtio-bus", NULL); 98 qos_node_produces("virtio-rng-device", "virtio"); 99 qos_node_produces("virtio-rng-device", "virtio-rng"); 100 101 /* virtio-rng-pci */ 102 add_qpci_address(&opts, &addr); 103 qos_node_create_driver("virtio-rng-pci", virtio_rng_pci_create); 104 qos_node_consumes("virtio-rng-pci", "pci-bus", &opts); 105 qos_node_produces("virtio-rng-pci", "pci-device"); 106 qos_node_produces("virtio-rng-pci", "virtio"); 107 qos_node_produces("virtio-rng-pci", "virtio-rng"); 108 } 109 110 libqos_init(virtio_rng_register_nodes); 111