1 /* 2 * VirtioBus 3 * 4 * Copyright (C) 2012 : GreenSocs Ltd 5 * http://www.greensocs.com/ , email: info@greensocs.com 6 * 7 * Developed by : 8 * Frederic Konrad <fred.konrad@greensocs.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation, either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License along 21 * with this program; if not, see <http://www.gnu.org/licenses/>. 22 * 23 */ 24 25 #include "hw/hw.h" 26 #include "qemu/error-report.h" 27 #include "hw/qdev.h" 28 #include "hw/virtio/virtio-bus.h" 29 #include "hw/virtio/virtio.h" 30 31 /* #define DEBUG_VIRTIO_BUS */ 32 33 #ifdef DEBUG_VIRTIO_BUS 34 #define DPRINTF(fmt, ...) \ 35 do { printf("virtio_bus: " fmt , ## __VA_ARGS__); } while (0) 36 #else 37 #define DPRINTF(fmt, ...) do { } while (0) 38 #endif 39 40 /* Plug the VirtIODevice */ 41 int virtio_bus_plug_device(VirtIODevice *vdev) 42 { 43 DeviceState *qdev = DEVICE(vdev); 44 BusState *qbus = BUS(qdev_get_parent_bus(qdev)); 45 VirtioBusState *bus = VIRTIO_BUS(qbus); 46 VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); 47 DPRINTF("%s: plug device.\n", qbus->name); 48 49 bus->vdev = vdev; 50 51 if (klass->device_plugged != NULL) { 52 klass->device_plugged(qbus->parent); 53 } 54 55 return 0; 56 } 57 58 /* Reset the virtio_bus */ 59 void virtio_bus_reset(VirtioBusState *bus) 60 { 61 DPRINTF("%s: reset device.\n", qbus->name); 62 if (bus->vdev != NULL) { 63 virtio_reset(bus->vdev); 64 } 65 } 66 67 /* Destroy the VirtIODevice */ 68 void virtio_bus_destroy_device(VirtioBusState *bus) 69 { 70 DeviceState *qdev; 71 BusState *qbus = BUS(bus); 72 VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); 73 DPRINTF("%s: remove device.\n", qbus->name); 74 75 if (bus->vdev != NULL) { 76 if (klass->device_unplug != NULL) { 77 klass->device_unplug(qbus->parent); 78 } 79 qdev = DEVICE(bus->vdev); 80 qdev_free(qdev); 81 bus->vdev = NULL; 82 } 83 } 84 85 /* Get the device id of the plugged device. */ 86 uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus) 87 { 88 assert(bus->vdev != NULL); 89 return bus->vdev->device_id; 90 } 91 92 /* Get the config_len field of the plugged device. */ 93 size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus) 94 { 95 assert(bus->vdev != NULL); 96 return bus->vdev->config_len; 97 } 98 99 /* Get the features of the plugged device. */ 100 uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus, 101 uint32_t requested_features) 102 { 103 VirtioDeviceClass *k; 104 assert(bus->vdev != NULL); 105 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 106 assert(k->get_features != NULL); 107 return k->get_features(bus->vdev, requested_features); 108 } 109 110 /* Set the features of the plugged device. */ 111 void virtio_bus_set_vdev_features(VirtioBusState *bus, 112 uint32_t requested_features) 113 { 114 VirtioDeviceClass *k; 115 assert(bus->vdev != NULL); 116 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 117 if (k->set_features != NULL) { 118 k->set_features(bus->vdev, requested_features); 119 } 120 } 121 122 /* Get bad features of the plugged device. */ 123 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus) 124 { 125 VirtioDeviceClass *k; 126 assert(bus->vdev != NULL); 127 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 128 if (k->bad_features != NULL) { 129 return k->bad_features(bus->vdev); 130 } else { 131 return 0; 132 } 133 } 134 135 /* Get config of the plugged device. */ 136 void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config) 137 { 138 VirtioDeviceClass *k; 139 assert(bus->vdev != NULL); 140 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 141 if (k->get_config != NULL) { 142 k->get_config(bus->vdev, config); 143 } 144 } 145 146 /* Set config of the plugged device. */ 147 void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config) 148 { 149 VirtioDeviceClass *k; 150 assert(bus->vdev != NULL); 151 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 152 if (k->set_config != NULL) { 153 k->set_config(bus->vdev, config); 154 } 155 } 156 157 static char *virtio_bus_get_dev_path(DeviceState *dev) 158 { 159 BusState *bus = qdev_get_parent_bus(dev); 160 DeviceState *proxy = DEVICE(bus->parent); 161 return qdev_get_dev_path(proxy); 162 } 163 164 static char *virtio_bus_get_fw_dev_path(DeviceState *dev) 165 { 166 return NULL; 167 } 168 169 static void virtio_bus_class_init(ObjectClass *klass, void *data) 170 { 171 BusClass *bus_class = BUS_CLASS(klass); 172 bus_class->get_dev_path = virtio_bus_get_dev_path; 173 bus_class->get_fw_dev_path = virtio_bus_get_fw_dev_path; 174 } 175 176 static const TypeInfo virtio_bus_info = { 177 .name = TYPE_VIRTIO_BUS, 178 .parent = TYPE_BUS, 179 .instance_size = sizeof(VirtioBusState), 180 .abstract = true, 181 .class_size = sizeof(VirtioBusClass), 182 .class_init = virtio_bus_class_init 183 }; 184 185 static void virtio_register_types(void) 186 { 187 type_register_static(&virtio_bus_info); 188 } 189 190 type_init(virtio_register_types) 191