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 BusState *qbus = BUS(bus); 71 VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); 72 DPRINTF("%s: remove device.\n", qbus->name); 73 74 if (bus->vdev != NULL) { 75 if (klass->device_unplug != NULL) { 76 klass->device_unplug(qbus->parent); 77 } 78 object_unparent(OBJECT(bus->vdev)); 79 bus->vdev = NULL; 80 } 81 } 82 83 /* Get the device id of the plugged device. */ 84 uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus) 85 { 86 assert(bus->vdev != NULL); 87 return bus->vdev->device_id; 88 } 89 90 /* Get the config_len field of the plugged device. */ 91 size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus) 92 { 93 assert(bus->vdev != NULL); 94 return bus->vdev->config_len; 95 } 96 97 /* Get the features of the plugged device. */ 98 uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus, 99 uint32_t requested_features) 100 { 101 VirtioDeviceClass *k; 102 assert(bus->vdev != NULL); 103 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 104 assert(k->get_features != NULL); 105 return k->get_features(bus->vdev, requested_features); 106 } 107 108 /* Set the features of the plugged device. */ 109 void virtio_bus_set_vdev_features(VirtioBusState *bus, 110 uint32_t requested_features) 111 { 112 VirtioDeviceClass *k; 113 assert(bus->vdev != NULL); 114 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 115 if (k->set_features != NULL) { 116 k->set_features(bus->vdev, requested_features); 117 } 118 } 119 120 /* Get bad features of the plugged device. */ 121 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus) 122 { 123 VirtioDeviceClass *k; 124 assert(bus->vdev != NULL); 125 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 126 if (k->bad_features != NULL) { 127 return k->bad_features(bus->vdev); 128 } else { 129 return 0; 130 } 131 } 132 133 /* Get config of the plugged device. */ 134 void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config) 135 { 136 VirtioDeviceClass *k; 137 assert(bus->vdev != NULL); 138 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 139 if (k->get_config != NULL) { 140 k->get_config(bus->vdev, config); 141 } 142 } 143 144 /* Set config of the plugged device. */ 145 void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config) 146 { 147 VirtioDeviceClass *k; 148 assert(bus->vdev != NULL); 149 k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); 150 if (k->set_config != NULL) { 151 k->set_config(bus->vdev, config); 152 } 153 } 154 155 static char *virtio_bus_get_dev_path(DeviceState *dev) 156 { 157 BusState *bus = qdev_get_parent_bus(dev); 158 DeviceState *proxy = DEVICE(bus->parent); 159 return qdev_get_dev_path(proxy); 160 } 161 162 static char *virtio_bus_get_fw_dev_path(DeviceState *dev) 163 { 164 return NULL; 165 } 166 167 static void virtio_bus_class_init(ObjectClass *klass, void *data) 168 { 169 BusClass *bus_class = BUS_CLASS(klass); 170 bus_class->get_dev_path = virtio_bus_get_dev_path; 171 bus_class->get_fw_dev_path = virtio_bus_get_fw_dev_path; 172 } 173 174 static const TypeInfo virtio_bus_info = { 175 .name = TYPE_VIRTIO_BUS, 176 .parent = TYPE_BUS, 177 .instance_size = sizeof(VirtioBusState), 178 .abstract = true, 179 .class_size = sizeof(VirtioBusClass), 180 .class_init = virtio_bus_class_init 181 }; 182 183 static void virtio_register_types(void) 184 { 185 type_register_static(&virtio_bus_info); 186 } 187 188 type_init(virtio_register_types) 189