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-rng.h" 24 25 /* virtio-rng-device */ 26 static void *qvirtio_rng_get_driver(QVirtioRng *v_rng, 27 const char *interface) 28 { 29 if (!g_strcmp0(interface, "virtio-rng")) { 30 return v_rng; 31 } 32 if (!g_strcmp0(interface, "virtio")) { 33 return v_rng->vdev; 34 } 35 36 fprintf(stderr, "%s not present in virtio-rng-device\n", interface); 37 g_assert_not_reached(); 38 } 39 40 static void *qvirtio_rng_device_get_driver(void *object, 41 const char *interface) 42 { 43 QVirtioRngDevice *v_rng = object; 44 return qvirtio_rng_get_driver(&v_rng->rng, interface); 45 } 46 47 static void *virtio_rng_device_create(void *virtio_dev, 48 QGuestAllocator *t_alloc, 49 void *addr) 50 { 51 QVirtioRngDevice *virtio_rdevice = g_new0(QVirtioRngDevice, 1); 52 QVirtioRng *interface = &virtio_rdevice->rng; 53 54 interface->vdev = virtio_dev; 55 56 virtio_rdevice->obj.get_driver = qvirtio_rng_device_get_driver; 57 58 return &virtio_rdevice->obj; 59 } 60 61 /* virtio-rng-pci */ 62 static void *qvirtio_rng_pci_get_driver(void *object, const char *interface) 63 { 64 QVirtioRngPCI *v_rng = object; 65 if (!g_strcmp0(interface, "pci-device")) { 66 return v_rng->pci_vdev.pdev; 67 } 68 return qvirtio_rng_get_driver(&v_rng->rng, interface); 69 } 70 71 static void *virtio_rng_pci_create(void *pci_bus, QGuestAllocator *t_alloc, 72 void *addr) 73 { 74 QVirtioRngPCI *virtio_rpci = g_new0(QVirtioRngPCI, 1); 75 QVirtioRng *interface = &virtio_rpci->rng; 76 QOSGraphObject *obj = &virtio_rpci->pci_vdev.obj; 77 78 virtio_pci_init(&virtio_rpci->pci_vdev, pci_bus, addr); 79 interface->vdev = &virtio_rpci->pci_vdev.vdev; 80 81 obj->get_driver = qvirtio_rng_pci_get_driver; 82 83 return obj; 84 } 85 86 static void virtio_rng_register_nodes(void) 87 { 88 QPCIAddress addr = { 89 .devfn = QPCI_DEVFN(4, 0), 90 }; 91 92 QOSGraphEdgeOptions opts = { 93 .extra_device_opts = "addr=04.0", 94 }; 95 96 /* virtio-rng-device */ 97 qos_node_create_driver("virtio-rng-device", virtio_rng_device_create); 98 qos_node_consumes("virtio-rng-device", "virtio-bus", NULL); 99 qos_node_produces("virtio-rng-device", "virtio"); 100 qos_node_produces("virtio-rng-device", "virtio-rng"); 101 102 /* virtio-rng-pci */ 103 add_qpci_address(&opts, &addr); 104 qos_node_create_driver("virtio-rng-pci", virtio_rng_pci_create); 105 qos_node_consumes("virtio-rng-pci", "pci-bus", &opts); 106 qos_node_produces("virtio-rng-pci", "pci-device"); 107 qos_node_produces("virtio-rng-pci", "virtio"); 108 qos_node_produces("virtio-rng-pci", "virtio-rng"); 109 } 110 111 libqos_init(virtio_rng_register_nodes); 112