1 /* 2 * Copyright 2013, 2018, Jérôme Duval, jerome.duval@gmail.com. 3 * Distributed under the terms of the MIT License. 4 */ 5 6 7 #include "VirtioPrivate.h" 8 9 10 device_manager_info *gDeviceManager = NULL; 11 12 13 // #pragma mark - 14 15 16 static status_t 17 virtio_device_init(device_node *node, void **_device) 18 { 19 CALLED(); 20 VirtioDevice *device = new(std::nothrow) VirtioDevice(node); 21 if (device == NULL) 22 return B_NO_MEMORY; 23 24 status_t result = device->InitCheck(); 25 if (result != B_OK) { 26 ERROR("failed to set up virtio device object\n"); 27 delete device; 28 return result; 29 } 30 31 *_device = device; 32 return B_OK; 33 } 34 35 36 static void 37 virtio_device_uninit(void *_device) 38 { 39 CALLED(); 40 VirtioDevice *device = (VirtioDevice *)_device; 41 delete device; 42 } 43 44 45 static void 46 virtio_device_removed(void *_device) 47 { 48 CALLED(); 49 //VirtioDevice *device = (VirtioDevice *)_device; 50 } 51 52 53 // #pragma mark - 54 55 56 status_t 57 virtio_negotiate_features(void* _device, uint32 supported, 58 uint32* negotiated, const char* (*get_feature_name)(uint32)) 59 { 60 CALLED(); 61 VirtioDevice *device = (VirtioDevice *)_device; 62 63 return device->NegotiateFeatures(supported, negotiated, get_feature_name); 64 } 65 66 67 status_t 68 virtio_clear_feature(void* _device, uint32 feature) 69 { 70 CALLED(); 71 VirtioDevice *device = (VirtioDevice *)_device; 72 73 return device->ClearFeature(feature); 74 } 75 76 77 status_t 78 virtio_read_device_config(void* _device, uint8 offset, void* buffer, 79 size_t bufferSize) 80 { 81 CALLED(); 82 VirtioDevice *device = (VirtioDevice *)_device; 83 84 return device->ReadDeviceConfig(offset, buffer, bufferSize); 85 } 86 87 88 status_t 89 virtio_write_device_config(void* _device, uint8 offset, 90 const void* buffer, size_t bufferSize) 91 { 92 CALLED(); 93 VirtioDevice *device = (VirtioDevice *)_device; 94 95 return device->WriteDeviceConfig(offset, buffer, bufferSize); 96 } 97 98 99 status_t 100 virtio_alloc_queues(virtio_device _device, size_t count, virtio_queue *queues) 101 { 102 CALLED(); 103 VirtioDevice *device = (VirtioDevice *)_device; 104 return device->AllocateQueues(count, queues); 105 } 106 107 108 void 109 virtio_free_queues(virtio_device _device) 110 { 111 CALLED(); 112 VirtioDevice *device = (VirtioDevice *)_device; 113 device->FreeQueues(); 114 } 115 116 117 status_t 118 virtio_setup_interrupt(virtio_device _device, virtio_intr_func config_handler, 119 void *driverCookie) 120 { 121 CALLED(); 122 VirtioDevice *device = (VirtioDevice *)_device; 123 return device->SetupInterrupt(config_handler, driverCookie); 124 } 125 126 127 status_t 128 virtio_free_interrupts(virtio_device _device) 129 { 130 CALLED(); 131 VirtioDevice *device = (VirtioDevice *)_device; 132 return device->FreeInterrupts(); 133 } 134 135 136 status_t 137 virtio_queue_setup_interrupt(virtio_queue _queue, virtio_callback_func handler, 138 void *cookie) 139 { 140 CALLED(); 141 VirtioQueue *queue = (VirtioQueue *)_queue; 142 return queue->SetupInterrupt(handler, cookie); 143 } 144 145 146 status_t 147 virtio_queue_request_v(virtio_queue _queue, const physical_entry* vector, 148 size_t readVectorCount, size_t writtenVectorCount, void *cookie) 149 { 150 CALLED(); 151 VirtioQueue *queue = (VirtioQueue *)_queue; 152 return queue->QueueRequest(vector, readVectorCount, writtenVectorCount, 153 cookie); 154 } 155 156 157 status_t 158 virtio_queue_request(virtio_queue _queue, const physical_entry *readEntry, 159 const physical_entry *writtenEntry, void *cookie) 160 { 161 physical_entry entries[2]; 162 if (readEntry != NULL) { 163 entries[0] = *readEntry; 164 if (writtenEntry != NULL) 165 entries[1] = *writtenEntry; 166 } else if (writtenEntry != NULL) 167 entries[0] = *writtenEntry; 168 169 return virtio_queue_request_v(_queue, entries, readEntry != NULL ? 1 : 0, 170 writtenEntry != NULL? 1 : 0, cookie); 171 } 172 173 174 bool 175 virtio_queue_is_full(virtio_queue _queue) 176 { 177 VirtioQueue *queue = (VirtioQueue *)_queue; 178 return queue->IsFull(); 179 } 180 181 182 bool 183 virtio_queue_is_empty(virtio_queue _queue) 184 { 185 VirtioQueue *queue = (VirtioQueue *)_queue; 186 return queue->IsEmpty(); 187 } 188 189 190 uint16 191 virtio_queue_size(virtio_queue _queue) 192 { 193 VirtioQueue *queue = (VirtioQueue *)_queue; 194 return queue->Size(); 195 } 196 197 198 bool 199 virtio_queue_dequeue(virtio_queue _queue, void** _cookie, uint32* _usedLength) 200 { 201 VirtioQueue *queue = (VirtioQueue *)_queue; 202 return queue->Dequeue(_cookie, _usedLength); 203 } 204 205 206 // #pragma mark - 207 208 209 status_t 210 virtio_added_device(device_node *parent) 211 { 212 CALLED(); 213 214 uint16 deviceType; 215 if (gDeviceManager->get_attr_uint16(parent, 216 VIRTIO_DEVICE_TYPE_ITEM, &deviceType, true) != B_OK) { 217 ERROR("device type missing\n"); 218 return B_ERROR; 219 } 220 221 device_attr attributes[] = { 222 // info about device 223 { B_DEVICE_BUS, B_STRING_TYPE, { .string = "virtio" }}, 224 { VIRTIO_DEVICE_TYPE_ITEM, B_UINT16_TYPE, 225 { .ui16 = deviceType }}, 226 { NULL } 227 }; 228 229 return gDeviceManager->register_node(parent, VIRTIO_DEVICE_MODULE_NAME, 230 attributes, NULL, NULL); 231 } 232 233 234 status_t 235 virtio_queue_interrupt_handler(virtio_sim sim, uint16 queue) 236 { 237 VirtioDevice* device = (VirtioDevice*)sim; 238 return device->QueueInterrupt(queue); 239 } 240 241 242 status_t 243 virtio_config_interrupt_handler(virtio_sim sim) 244 { 245 VirtioDevice* device = (VirtioDevice*)sim; 246 return device->ConfigInterrupt(); 247 } 248 249 250 static status_t 251 std_ops(int32 op, ...) 252 { 253 switch (op) { 254 case B_MODULE_INIT: 255 case B_MODULE_UNINIT: 256 return B_OK; 257 258 default: 259 break; 260 } 261 262 return B_ERROR; 263 } 264 265 266 // #pragma mark - 267 268 269 virtio_device_interface virtio_device_module = { 270 { 271 { 272 VIRTIO_DEVICE_MODULE_NAME, 273 0, 274 std_ops 275 }, 276 277 NULL, // supported devices 278 NULL, // register node 279 virtio_device_init, 280 virtio_device_uninit, 281 NULL, // register child devices 282 NULL, // rescan 283 virtio_device_removed, 284 NULL, // suspend 285 NULL, // resume 286 }, 287 288 virtio_negotiate_features, 289 virtio_clear_feature, 290 virtio_read_device_config, 291 virtio_write_device_config, 292 virtio_alloc_queues, 293 virtio_free_queues, 294 virtio_setup_interrupt, 295 virtio_free_interrupts, 296 virtio_queue_setup_interrupt, 297 virtio_queue_request, 298 virtio_queue_request_v, 299 virtio_queue_is_full, 300 virtio_queue_is_empty, 301 virtio_queue_size, 302 virtio_queue_dequeue 303 }; 304 305 virtio_for_controller_interface virtio_for_controller_module = { 306 { 307 { 308 VIRTIO_FOR_CONTROLLER_MODULE_NAME, 309 0, 310 &std_ops 311 }, 312 313 NULL, // supported devices 314 virtio_added_device, 315 NULL, 316 NULL, 317 NULL 318 }, 319 320 virtio_queue_interrupt_handler, 321 virtio_config_interrupt_handler 322 }; 323 324 325 module_dependency module_dependencies[] = { 326 { B_DEVICE_MANAGER_MODULE_NAME, (module_info **)&gDeviceManager }, 327 {} 328 }; 329 330 331 extern struct driver_module_info sVirtioBalloonDriver; 332 extern struct driver_module_info sVirtioBalloonDeviceInterface; 333 334 335 module_info *modules[] = { 336 (module_info *)&virtio_for_controller_module, 337 (module_info *)&virtio_device_module, 338 (module_info *)&sVirtioBalloonDriver, 339 (module_info *)&sVirtioBalloonDeviceInterface, 340 NULL 341 }; 342 343