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 "standard-headers/linux/virtio_ids.h" 23 #include "virtio-9p.h" 24 #include "qgraph.h" 25 26 static QGuestAllocator *alloc; 27 28 static void virtio_9p_cleanup(QVirtio9P *interface) 29 { 30 qvirtqueue_cleanup(interface->vdev->bus, interface->vq, alloc); 31 } 32 33 static void virtio_9p_setup(QVirtio9P *interface) 34 { 35 uint64_t features; 36 37 features = qvirtio_get_features(interface->vdev); 38 features &= ~(QVIRTIO_F_BAD_FEATURE | (1ull << VIRTIO_RING_F_EVENT_IDX)); 39 qvirtio_set_features(interface->vdev, features); 40 41 interface->vq = qvirtqueue_setup(interface->vdev, alloc, 0); 42 qvirtio_set_driver_ok(interface->vdev); 43 } 44 45 /* virtio-9p-device */ 46 static void virtio_9p_device_destructor(QOSGraphObject *obj) 47 { 48 QVirtio9PDevice *v_9p = (QVirtio9PDevice *) obj; 49 QVirtio9P *v9p = &v_9p->v9p; 50 51 virtio_9p_cleanup(v9p); 52 } 53 54 static void virtio_9p_device_start_hw(QOSGraphObject *obj) 55 { 56 QVirtio9PDevice *v_9p = (QVirtio9PDevice *) obj; 57 QVirtio9P *v9p = &v_9p->v9p; 58 59 virtio_9p_setup(v9p); 60 } 61 62 static void *virtio_9p_get_driver(QVirtio9P *v_9p, 63 const char *interface) 64 { 65 if (!g_strcmp0(interface, "virtio-9p")) { 66 return v_9p; 67 } 68 if (!g_strcmp0(interface, "virtio")) { 69 return v_9p->vdev; 70 } 71 72 fprintf(stderr, "%s not present in virtio-9p-device\n", interface); 73 g_assert_not_reached(); 74 } 75 76 static void *virtio_9p_device_get_driver(void *object, const char *interface) 77 { 78 QVirtio9PDevice *v_9p = object; 79 return virtio_9p_get_driver(&v_9p->v9p, interface); 80 } 81 82 static void *virtio_9p_device_create(void *virtio_dev, 83 QGuestAllocator *t_alloc, 84 void *addr) 85 { 86 QVirtio9PDevice *virtio_device = g_new0(QVirtio9PDevice, 1); 87 QVirtio9P *interface = &virtio_device->v9p; 88 89 interface->vdev = virtio_dev; 90 alloc = t_alloc; 91 92 virtio_device->obj.destructor = virtio_9p_device_destructor; 93 virtio_device->obj.get_driver = virtio_9p_device_get_driver; 94 virtio_device->obj.start_hw = virtio_9p_device_start_hw; 95 96 return &virtio_device->obj; 97 } 98 99 /* virtio-9p-pci */ 100 static void virtio_9p_pci_destructor(QOSGraphObject *obj) 101 { 102 QVirtio9PPCI *v9_pci = (QVirtio9PPCI *) obj; 103 QVirtio9P *interface = &v9_pci->v9p; 104 QOSGraphObject *pci_vobj = &v9_pci->pci_vdev.obj; 105 106 virtio_9p_cleanup(interface); 107 qvirtio_pci_destructor(pci_vobj); 108 } 109 110 static void virtio_9p_pci_start_hw(QOSGraphObject *obj) 111 { 112 QVirtio9PPCI *v9_pci = (QVirtio9PPCI *) obj; 113 QVirtio9P *interface = &v9_pci->v9p; 114 QOSGraphObject *pci_vobj = &v9_pci->pci_vdev.obj; 115 116 qvirtio_pci_start_hw(pci_vobj); 117 virtio_9p_setup(interface); 118 } 119 120 static void *virtio_9p_pci_get_driver(void *object, const char *interface) 121 { 122 QVirtio9PPCI *v_9p = object; 123 if (!g_strcmp0(interface, "pci-device")) { 124 return v_9p->pci_vdev.pdev; 125 } 126 return virtio_9p_get_driver(&v_9p->v9p, interface); 127 } 128 129 static void *virtio_9p_pci_create(void *pci_bus, QGuestAllocator *t_alloc, 130 void *addr) 131 { 132 QVirtio9PPCI *v9_pci = g_new0(QVirtio9PPCI, 1); 133 QVirtio9P *interface = &v9_pci->v9p; 134 QOSGraphObject *obj = &v9_pci->pci_vdev.obj; 135 136 virtio_pci_init(&v9_pci->pci_vdev, pci_bus, addr); 137 interface->vdev = &v9_pci->pci_vdev.vdev; 138 alloc = t_alloc; 139 140 g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_9P); 141 142 obj->destructor = virtio_9p_pci_destructor; 143 obj->start_hw = virtio_9p_pci_start_hw; 144 obj->get_driver = virtio_9p_pci_get_driver; 145 146 return obj; 147 } 148 149 static void virtio_9p_register_nodes(void) 150 { 151 const char *str_simple = "fsdev=fsdev0,mount_tag=" MOUNT_TAG; 152 const char *str_addr = "fsdev=fsdev0,addr=04.0,mount_tag=" MOUNT_TAG; 153 154 QPCIAddress addr = { 155 .devfn = QPCI_DEVFN(4, 0), 156 }; 157 158 QOSGraphEdgeOptions opts = { 159 .before_cmd_line = "-fsdev synth,id=fsdev0", 160 }; 161 162 /* virtio-9p-device */ 163 opts.extra_device_opts = str_simple, 164 qos_node_create_driver("virtio-9p-device", virtio_9p_device_create); 165 qos_node_consumes("virtio-9p-device", "virtio-bus", &opts); 166 qos_node_produces("virtio-9p-device", "virtio"); 167 qos_node_produces("virtio-9p-device", "virtio-9p"); 168 169 /* virtio-9p-pci */ 170 opts.extra_device_opts = str_addr; 171 add_qpci_address(&opts, &addr); 172 qos_node_create_driver("virtio-9p-pci", virtio_9p_pci_create); 173 qos_node_consumes("virtio-9p-pci", "pci-bus", &opts); 174 qos_node_produces("virtio-9p-pci", "pci-device"); 175 qos_node_produces("virtio-9p-pci", "virtio"); 176 qos_node_produces("virtio-9p-pci", "virtio-9p"); 177 178 } 179 180 libqos_init(virtio_9p_register_nodes); 181