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 /* A VirtIODevice is being plugged */ 41 int virtio_bus_device_plugged(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 if (klass->device_plugged != NULL) { 50 klass->device_plugged(qbus->parent); 51 } 52 53 return 0; 54 } 55 56 /* Reset the virtio_bus */ 57 void virtio_bus_reset(VirtioBusState *bus) 58 { 59 VirtIODevice *vdev = virtio_bus_get_device(bus); 60 61 DPRINTF("%s: reset device.\n", BUS(bus)->name); 62 if (vdev != NULL) { 63 virtio_reset(vdev); 64 } 65 } 66 67 /* A VirtIODevice is being unplugged */ 68 void virtio_bus_device_unplugged(VirtIODevice *vdev) 69 { 70 DeviceState *qdev = DEVICE(vdev); 71 BusState *qbus = BUS(qdev_get_parent_bus(qdev)); 72 VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(qbus); 73 74 DPRINTF("%s: remove device.\n", qbus->name); 75 76 if (vdev != NULL) { 77 if (klass->device_unplugged != NULL) { 78 klass->device_unplugged(qbus->parent); 79 } 80 } 81 } 82 83 /* Get the device id of the plugged device. */ 84 uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus) 85 { 86 VirtIODevice *vdev = virtio_bus_get_device(bus); 87 assert(vdev != NULL); 88 return vdev->device_id; 89 } 90 91 /* Get the config_len field of the plugged device. */ 92 size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus) 93 { 94 VirtIODevice *vdev = virtio_bus_get_device(bus); 95 assert(vdev != NULL); 96 return 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 VirtIODevice *vdev = virtio_bus_get_device(bus); 104 VirtioDeviceClass *k; 105 106 assert(vdev != NULL); 107 k = VIRTIO_DEVICE_GET_CLASS(vdev); 108 assert(k->get_features != NULL); 109 return k->get_features(vdev, requested_features); 110 } 111 112 /* Get bad features of the plugged device. */ 113 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus) 114 { 115 VirtIODevice *vdev = virtio_bus_get_device(bus); 116 VirtioDeviceClass *k; 117 118 assert(vdev != NULL); 119 k = VIRTIO_DEVICE_GET_CLASS(vdev); 120 if (k->bad_features != NULL) { 121 return k->bad_features(vdev); 122 } else { 123 return 0; 124 } 125 } 126 127 /* Get config of the plugged device. */ 128 void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config) 129 { 130 VirtIODevice *vdev = virtio_bus_get_device(bus); 131 VirtioDeviceClass *k; 132 133 assert(vdev != NULL); 134 k = VIRTIO_DEVICE_GET_CLASS(vdev); 135 if (k->get_config != NULL) { 136 k->get_config(vdev, config); 137 } 138 } 139 140 /* Set config of the plugged device. */ 141 void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config) 142 { 143 VirtIODevice *vdev = virtio_bus_get_device(bus); 144 VirtioDeviceClass *k; 145 146 assert(vdev != NULL); 147 k = VIRTIO_DEVICE_GET_CLASS(vdev); 148 if (k->set_config != NULL) { 149 k->set_config(vdev, config); 150 } 151 } 152 153 static char *virtio_bus_get_dev_path(DeviceState *dev) 154 { 155 BusState *bus = qdev_get_parent_bus(dev); 156 DeviceState *proxy = DEVICE(bus->parent); 157 return qdev_get_dev_path(proxy); 158 } 159 160 static char *virtio_bus_get_fw_dev_path(DeviceState *dev) 161 { 162 return NULL; 163 } 164 165 static void virtio_bus_class_init(ObjectClass *klass, void *data) 166 { 167 BusClass *bus_class = BUS_CLASS(klass); 168 bus_class->get_dev_path = virtio_bus_get_dev_path; 169 bus_class->get_fw_dev_path = virtio_bus_get_fw_dev_path; 170 } 171 172 static const TypeInfo virtio_bus_info = { 173 .name = TYPE_VIRTIO_BUS, 174 .parent = TYPE_BUS, 175 .instance_size = sizeof(VirtioBusState), 176 .abstract = true, 177 .class_size = sizeof(VirtioBusClass), 178 .class_init = virtio_bus_class_init 179 }; 180 181 static void virtio_register_types(void) 182 { 183 type_register_static(&virtio_bus_info); 184 } 185 186 type_init(virtio_register_types) 187