Changeset 41811af in mainline for uspace/lib/c/generic/devman.c
- Timestamp:
- 2011-06-10T10:14:26Z (14 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- ab547063
- Parents:
- 9536e6e (diff), 390d80d (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
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links above to see all the changes relative to each parent. - File:
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- 1 edited
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uspace/lib/c/generic/devman.c
r9536e6e r41811af 36 36 37 37 #include <str.h> 38 #include <stdio.h>39 38 #include <ipc/services.h> 39 #include <ns.h> 40 40 #include <ipc/devman.h> 41 41 #include <devman.h> 42 #include <fibril_synch.h> 42 43 #include <async.h> 43 #include <fibril_synch.h>44 44 #include <errno.h> 45 45 #include <malloc.h> 46 46 #include <bool.h> 47 #include <adt/list.h> 48 49 static int devman_phone_driver = -1; 50 static int devman_phone_client = -1; 51 52 static FIBRIL_MUTEX_INITIALIZE(devman_phone_mutex); 53 54 int devman_get_phone(devman_interface_t iface, unsigned int flags) 47 48 static FIBRIL_MUTEX_INITIALIZE(devman_driver_block_mutex); 49 static FIBRIL_MUTEX_INITIALIZE(devman_client_block_mutex); 50 51 static FIBRIL_MUTEX_INITIALIZE(devman_driver_mutex); 52 static FIBRIL_MUTEX_INITIALIZE(devman_client_mutex); 53 54 static async_sess_t *devman_driver_block_sess = NULL; 55 static async_sess_t *devman_client_block_sess = NULL; 56 57 static async_sess_t *devman_driver_sess = NULL; 58 static async_sess_t *devman_client_sess = NULL; 59 60 static void clone_session(fibril_mutex_t *mtx, async_sess_t *src, 61 async_sess_t **dst) 62 { 63 fibril_mutex_lock(mtx); 64 65 if ((*dst == NULL) && (src != NULL)) 66 *dst = src; 67 68 fibril_mutex_unlock(mtx); 69 } 70 71 /** Start an async exchange on the devman session (blocking). 72 * 73 * @param iface Device manager interface to choose 74 * 75 * @return New exchange. 76 * 77 */ 78 async_exch_t *devman_exchange_begin_blocking(devman_interface_t iface) 55 79 { 56 80 switch (iface) { 57 81 case DEVMAN_DRIVER: 58 fibril_mutex_lock(&devman_phone_mutex); 59 if (devman_phone_driver >= 0) { 60 fibril_mutex_unlock(&devman_phone_mutex); 61 return devman_phone_driver; 82 fibril_mutex_lock(&devman_driver_block_mutex); 83 84 while (devman_driver_block_sess == NULL) { 85 clone_session(&devman_driver_mutex, devman_driver_sess, 86 &devman_driver_block_sess); 87 88 if (devman_driver_block_sess == NULL) 89 devman_driver_block_sess = 90 service_connect_blocking(EXCHANGE_SERIALIZE, 91 SERVICE_DEVMAN, DEVMAN_DRIVER, 0); 62 92 } 63 93 64 if (flags & IPC_FLAG_BLOCKING) 65 devman_phone_driver = async_connect_me_to_blocking( 66 PHONE_NS, SERVICE_DEVMAN, DEVMAN_DRIVER, 0); 67 else 68 devman_phone_driver = async_connect_me_to(PHONE_NS, 69 SERVICE_DEVMAN, DEVMAN_DRIVER, 0); 70 71 fibril_mutex_unlock(&devman_phone_mutex); 72 return devman_phone_driver; 94 fibril_mutex_unlock(&devman_driver_block_mutex); 95 96 clone_session(&devman_driver_mutex, devman_driver_block_sess, 97 &devman_driver_sess); 98 99 return async_exchange_begin(devman_driver_block_sess); 73 100 case DEVMAN_CLIENT: 74 fibril_mutex_lock(&devman_phone_mutex); 75 if (devman_phone_client >= 0) { 76 fibril_mutex_unlock(&devman_phone_mutex); 77 return devman_phone_client; 101 fibril_mutex_lock(&devman_client_block_mutex); 102 103 while (devman_client_block_sess == NULL) { 104 clone_session(&devman_client_mutex, devman_client_sess, 105 &devman_client_block_sess); 106 107 if (devman_client_block_sess == NULL) 108 devman_client_block_sess = 109 service_connect_blocking(EXCHANGE_SERIALIZE, 110 SERVICE_DEVMAN, DEVMAN_CLIENT, 0); 78 111 } 79 112 80 if (flags & IPC_FLAG_BLOCKING) { 81 devman_phone_client = async_connect_me_to_blocking( 82 PHONE_NS, SERVICE_DEVMAN, DEVMAN_CLIENT, 0); 83 } else { 84 devman_phone_client = async_connect_me_to(PHONE_NS, 85 SERVICE_DEVMAN, DEVMAN_CLIENT, 0); 86 } 87 88 fibril_mutex_unlock(&devman_phone_mutex); 89 return devman_phone_client; 113 fibril_mutex_unlock(&devman_client_block_mutex); 114 115 clone_session(&devman_client_mutex, devman_client_block_sess, 116 &devman_client_sess); 117 118 return async_exchange_begin(devman_client_block_sess); 90 119 default: 91 return -1; 92 } 120 return NULL; 121 } 122 } 123 124 /** Start an async exchange on the devman session. 125 * 126 * @param iface Device manager interface to choose 127 * 128 * @return New exchange. 129 * 130 */ 131 async_exch_t *devman_exchange_begin(devman_interface_t iface) 132 { 133 switch (iface) { 134 case DEVMAN_DRIVER: 135 fibril_mutex_lock(&devman_driver_mutex); 136 137 if (devman_driver_sess == NULL) 138 devman_driver_sess = 139 service_connect(EXCHANGE_SERIALIZE, SERVICE_DEVMAN, 140 DEVMAN_DRIVER, 0); 141 142 fibril_mutex_unlock(&devman_driver_mutex); 143 144 if (devman_driver_sess == NULL) 145 return NULL; 146 147 return async_exchange_begin(devman_driver_sess); 148 case DEVMAN_CLIENT: 149 fibril_mutex_lock(&devman_client_mutex); 150 151 if (devman_client_sess == NULL) 152 devman_client_sess = 153 service_connect(EXCHANGE_SERIALIZE, SERVICE_DEVMAN, 154 DEVMAN_CLIENT, 0); 155 156 fibril_mutex_unlock(&devman_client_mutex); 157 158 if (devman_client_sess == NULL) 159 return NULL; 160 161 return async_exchange_begin(devman_client_sess); 162 default: 163 return NULL; 164 } 165 } 166 167 /** Finish an async exchange on the devman session. 168 * 169 * @param exch Exchange to be finished. 170 * 171 */ 172 void devman_exchange_end(async_exch_t *exch) 173 { 174 async_exchange_end(exch); 93 175 } 94 176 … … 96 178 int devman_driver_register(const char *name, async_client_conn_t conn) 97 179 { 98 int phone = devman_get_phone(DEVMAN_DRIVER, IPC_FLAG_BLOCKING); 99 100 if (phone < 0) 101 return phone; 102 103 async_serialize_start(); 104 105 ipc_call_t answer; 106 aid_t req = async_send_2(phone, DEVMAN_DRIVER_REGISTER, 0, 0, &answer); 107 108 sysarg_t retval = async_data_write_start(phone, name, str_size(name)); 109 if (retval != EOK) { 110 async_wait_for(req, NULL); 111 async_serialize_end(); 112 return -1; 180 async_exch_t *exch = devman_exchange_begin_blocking(DEVMAN_DRIVER); 181 182 ipc_call_t answer; 183 aid_t req = async_send_2(exch, DEVMAN_DRIVER_REGISTER, 0, 0, &answer); 184 sysarg_t retval = async_data_write_start(exch, name, str_size(name)); 185 186 devman_exchange_end(exch); 187 188 if (retval != EOK) { 189 async_wait_for(req, NULL); 190 return retval; 113 191 } 114 192 115 193 async_set_client_connection(conn); 116 194 117 async_connect_to_me(phone, 0, 0, 0, NULL); 195 exch = devman_exchange_begin(DEVMAN_DRIVER); 196 async_connect_to_me(exch, 0, 0, 0, NULL); 197 devman_exchange_end(exch); 198 118 199 async_wait_for(req, &retval); 119 120 async_serialize_end();121 122 200 return retval; 123 201 } 124 202 125 static int devman_send_match_id(int phone, match_id_t *match_id) 126 { 127 ipc_call_t answer; 128 129 aid_t req = async_send_1(phone, DEVMAN_ADD_MATCH_ID, match_id->score, 130 &answer); 131 int retval = async_data_write_start(phone, match_id->id, 132 str_size(match_id->id)); 133 134 async_wait_for(req, NULL); 135 return retval; 136 } 137 138 139 static int devman_send_match_ids(int phone, match_id_list_t *match_ids) 140 { 203 /** Add function to a device. 204 * 205 * Request devman to add a new function to the specified device owned by 206 * this driver task. 207 * 208 * @param name Name of the new function 209 * @param ftype Function type, fun_inner or fun_exposed 210 * @param match_ids Match IDs (should be empty for fun_exposed) 211 * @param devh Devman handle of the device 212 * @param funh Place to store handle of the new function 213 * 214 * @return EOK on success or negative error code. 215 * 216 */ 217 int devman_add_function(const char *name, fun_type_t ftype, 218 match_id_list_t *match_ids, devman_handle_t devh, devman_handle_t *funh) 219 { 220 int match_count = list_count(&match_ids->ids); 221 async_exch_t *exch = devman_exchange_begin_blocking(DEVMAN_DRIVER); 222 223 ipc_call_t answer; 224 aid_t req = async_send_3(exch, DEVMAN_ADD_FUNCTION, (sysarg_t) ftype, 225 devh, match_count, &answer); 226 sysarg_t retval = async_data_write_start(exch, name, str_size(name)); 227 if (retval != EOK) { 228 devman_exchange_end(exch); 229 async_wait_for(req, NULL); 230 return retval; 231 } 232 141 233 link_t *link = match_ids->ids.next; 142 234 match_id_t *match_id = NULL; 143 int ret = EOK; 144 235 145 236 while (link != &match_ids->ids) { 146 match_id = list_get_instance(link, match_id_t, link); 147 ret = devman_send_match_id(phone, match_id); 148 if (ret != EOK) { 149 return ret; 237 match_id = list_get_instance(link, match_id_t, link); 238 239 ipc_call_t answer2; 240 aid_t req2 = async_send_1(exch, DEVMAN_ADD_MATCH_ID, 241 match_id->score, &answer2); 242 retval = async_data_write_start(exch, match_id->id, 243 str_size(match_id->id)); 244 if (retval != EOK) { 245 devman_exchange_end(exch); 246 async_wait_for(req2, NULL); 247 async_wait_for(req, NULL); 248 return retval; 150 249 } 151 250 251 async_wait_for(req2, &retval); 252 if (retval != EOK) { 253 devman_exchange_end(exch); 254 async_wait_for(req, NULL); 255 return retval; 256 } 257 152 258 link = link->next; 153 259 } 154 155 return ret; 156 } 157 158 /** Add function to a device. 159 * 160 * Request devman to add a new function to the specified device owned by 161 * this driver task. 162 * 163 * @param name Name of the new function 164 * @param ftype Function type, fun_inner or fun_exposed 165 * @param match_ids Match IDs (should be empty for fun_exposed) 166 * @param devh Devman handle of the device 167 * @param funh Place to store handle of the new function 168 * 169 * @return EOK on success or negative error code. 170 */ 171 int devman_add_function(const char *name, fun_type_t ftype, 172 match_id_list_t *match_ids, devman_handle_t devh, devman_handle_t *funh) 173 { 174 int phone = devman_get_phone(DEVMAN_DRIVER, IPC_FLAG_BLOCKING); 175 int fun_handle; 176 177 if (phone < 0) 178 return phone; 179 180 async_serialize_start(); 181 182 int match_count = list_count(&match_ids->ids); 183 ipc_call_t answer; 184 185 aid_t req = async_send_3(phone, DEVMAN_ADD_FUNCTION, (sysarg_t) ftype, 186 devh, match_count, &answer); 187 188 sysarg_t retval = async_data_write_start(phone, name, str_size(name)); 189 if (retval != EOK) { 190 async_wait_for(req, NULL); 191 async_serialize_end(); 192 return retval; 193 } 194 195 int match_ids_rc = devman_send_match_ids(phone, match_ids); 260 261 devman_exchange_end(exch); 196 262 197 263 async_wait_for(req, &retval); 198 199 async_serialize_end(); 200 201 /* Prefer the answer to DEVMAN_ADD_FUNCTION in case of errors. */ 202 if ((match_ids_rc != EOK) && (retval == EOK)) { 203 retval = match_ids_rc; 204 } 205 206 if (retval == EOK) 207 fun_handle = (int) IPC_GET_ARG1(answer); 208 else 209 fun_handle = -1; 210 211 *funh = fun_handle; 212 264 if (retval == EOK) { 265 if (funh != NULL) 266 *funh = (int) IPC_GET_ARG1(answer); 267 } else { 268 if (funh != NULL) 269 *funh = -1; 270 } 271 213 272 return retval; 214 273 } … … 217 276 const char *class_name) 218 277 { 219 int phone = devman_get_phone(DEVMAN_DRIVER, IPC_FLAG_BLOCKING); 220 221 if (phone < 0) 222 return phone; 223 224 async_serialize_start(); 225 ipc_call_t answer; 226 aid_t req = async_send_1(phone, DEVMAN_ADD_DEVICE_TO_CLASS, 278 async_exch_t *exch = devman_exchange_begin_blocking(DEVMAN_DRIVER); 279 280 ipc_call_t answer; 281 aid_t req = async_send_1(exch, DEVMAN_ADD_DEVICE_TO_CLASS, 227 282 devman_handle, &answer); 228 229 sysarg_t retval = async_data_write_start(phone, class_name, 283 sysarg_t retval = async_data_write_start(exch, class_name, 230 284 str_size(class_name)); 231 if (retval != EOK) { 232 async_wait_for(req, NULL); 233 async_serialize_end(); 285 286 devman_exchange_end(exch); 287 288 if (retval != EOK) { 289 async_wait_for(req, NULL); 234 290 return retval; 235 291 } 236 292 237 293 async_wait_for(req, &retval); 238 async_serialize_end();239 240 294 return retval; 241 295 } 242 296 243 void devman_hangup_phone(devman_interface_t iface) 244 { 245 switch (iface) { 246 case DEVMAN_DRIVER: 247 if (devman_phone_driver >= 0) { 248 async_hangup(devman_phone_driver); 249 devman_phone_driver = -1; 250 } 251 break; 252 case DEVMAN_CLIENT: 253 if (devman_phone_client >= 0) { 254 async_hangup(devman_phone_client); 255 devman_phone_client = -1; 256 } 257 break; 258 default: 259 break; 260 } 261 } 262 263 int devman_device_connect(devman_handle_t handle, unsigned int flags) 264 { 265 int phone; 266 267 if (flags & IPC_FLAG_BLOCKING) { 268 phone = async_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAN, 269 DEVMAN_CONNECT_TO_DEVICE, handle); 270 } else { 271 phone = async_connect_me_to(PHONE_NS, SERVICE_DEVMAN, 272 DEVMAN_CONNECT_TO_DEVICE, handle); 273 } 274 275 return phone; 276 } 277 278 int devman_parent_device_connect(devman_handle_t handle, unsigned int flags) 279 { 280 int phone; 281 282 if (flags & IPC_FLAG_BLOCKING) { 283 phone = async_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAN, 284 DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle); 285 } else { 286 phone = async_connect_me_to(PHONE_NS, SERVICE_DEVMAN, 287 DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle); 288 } 289 290 return phone; 297 async_sess_t *devman_device_connect(exch_mgmt_t mgmt, devman_handle_t handle, 298 unsigned int flags) 299 { 300 async_sess_t *sess; 301 302 if (flags & IPC_FLAG_BLOCKING) 303 sess = service_connect_blocking(mgmt, SERVICE_DEVMAN, 304 DEVMAN_CONNECT_TO_DEVICE, handle); 305 else 306 sess = service_connect(mgmt, SERVICE_DEVMAN, 307 DEVMAN_CONNECT_TO_DEVICE, handle); 308 309 return sess; 310 } 311 312 async_sess_t *devman_parent_device_connect(exch_mgmt_t mgmt, 313 devman_handle_t handle, unsigned int flags) 314 { 315 async_sess_t *sess; 316 317 if (flags & IPC_FLAG_BLOCKING) 318 sess = service_connect_blocking(mgmt, SERVICE_DEVMAN, 319 DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle); 320 else 321 sess = service_connect(mgmt, SERVICE_DEVMAN, 322 DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle); 323 324 return sess; 291 325 } 292 326 … … 294 328 unsigned int flags) 295 329 { 296 int phone = devman_get_phone(DEVMAN_CLIENT, flags); 297 298 if (phone < 0) 299 return phone; 300 301 async_serialize_start(); 302 303 ipc_call_t answer; 304 aid_t req = async_send_2(phone, DEVMAN_DEVICE_GET_HANDLE, flags, 0, 330 async_exch_t *exch; 331 332 if (flags & IPC_FLAG_BLOCKING) 333 exch = devman_exchange_begin_blocking(DEVMAN_CLIENT); 334 else { 335 exch = devman_exchange_begin(DEVMAN_CLIENT); 336 if (exch == NULL) 337 return errno; 338 } 339 340 ipc_call_t answer; 341 aid_t req = async_send_2(exch, DEVMAN_DEVICE_GET_HANDLE, flags, 0, 305 342 &answer); 306 307 sysarg_t retval = async_data_write_start(phone, pathname, 343 sysarg_t retval = async_data_write_start(exch, pathname, 308 344 str_size(pathname)); 309 if (retval != EOK) { 310 async_wait_for(req, NULL); 311 async_serialize_end(); 345 346 devman_exchange_end(exch); 347 348 if (retval != EOK) { 349 async_wait_for(req, NULL); 312 350 return retval; 313 351 } 314 352 315 353 async_wait_for(req, &retval); 316 317 async_serialize_end();318 354 319 355 if (retval != EOK) { 320 356 if (handle != NULL) 321 357 *handle = (devman_handle_t) -1; 358 322 359 return retval; 323 360 } … … 332 369 const char *devname, devman_handle_t *handle, unsigned int flags) 333 370 { 334 int phone = devman_get_phone(DEVMAN_CLIENT, flags); 335 336 if (phone < 0) 337 return phone; 338 339 async_serialize_start(); 340 341 ipc_call_t answer; 342 aid_t req = async_send_1(phone, DEVMAN_DEVICE_GET_HANDLE_BY_CLASS, 371 async_exch_t *exch; 372 373 if (flags & IPC_FLAG_BLOCKING) 374 exch = devman_exchange_begin_blocking(DEVMAN_CLIENT); 375 else { 376 exch = devman_exchange_begin(DEVMAN_CLIENT); 377 if (exch == NULL) 378 return errno; 379 } 380 381 ipc_call_t answer; 382 aid_t req = async_send_1(exch, DEVMAN_DEVICE_GET_HANDLE_BY_CLASS, 343 383 flags, &answer); 344 345 sysarg_t retval = async_data_write_start(phone, classname, 384 sysarg_t retval = async_data_write_start(exch, classname, 346 385 str_size(classname)); 347 if (retval != EOK) { 348 async_wait_for(req, NULL); 349 async_serialize_end(); 350 return retval; 351 } 352 retval = async_data_write_start(phone, devname, 386 387 if (retval != EOK) { 388 devman_exchange_end(exch); 389 async_wait_for(req, NULL); 390 return retval; 391 } 392 393 retval = async_data_write_start(exch, devname, 353 394 str_size(devname)); 354 if (retval != EOK) { 355 async_wait_for(req, NULL); 356 async_serialize_end(); 357 return retval; 358 } 359 395 396 devman_exchange_end(exch); 397 398 if (retval != EOK) { 399 async_wait_for(req, NULL); 400 return retval; 401 } 402 360 403 async_wait_for(req, &retval); 361 362 async_serialize_end(); 363 404 364 405 if (retval != EOK) { 365 406 if (handle != NULL) 366 407 *handle = (devman_handle_t) -1; 367 return retval; 368 } 369 408 409 return retval; 410 } 411 370 412 if (handle != NULL) 371 413 *handle = (devman_handle_t) IPC_GET_ARG1(answer); 372 414 373 415 return retval; 374 416 } 375 417 418 int devman_get_device_path(devman_handle_t handle, char *path, size_t path_size) 419 { 420 async_exch_t *exch = devman_exchange_begin(DEVMAN_CLIENT); 421 if (exch == NULL) 422 return errno; 423 424 ipc_call_t answer; 425 aid_t req = async_send_1(exch, DEVMAN_DEVICE_GET_DEVICE_PATH, 426 handle, &answer); 427 428 ipc_call_t data_request_call; 429 aid_t data_request = async_data_read(exch, path, path_size, 430 &data_request_call); 431 432 devman_exchange_end(exch); 433 434 if (data_request == 0) { 435 async_wait_for(req, NULL); 436 return ENOMEM; 437 } 438 439 sysarg_t data_request_rc; 440 async_wait_for(data_request, &data_request_rc); 441 442 sysarg_t opening_request_rc; 443 async_wait_for(req, &opening_request_rc); 444 445 if (data_request_rc != EOK) { 446 /* Prefer the return code of the opening request. */ 447 if (opening_request_rc != EOK) 448 return (int) opening_request_rc; 449 else 450 return (int) data_request_rc; 451 } 452 453 if (opening_request_rc != EOK) 454 return (int) opening_request_rc; 455 456 /* To be on the safe-side. */ 457 path[path_size - 1] = 0; 458 size_t transferred_size = IPC_GET_ARG2(data_request_call); 459 if (transferred_size >= path_size) 460 return ELIMIT; 461 462 /* Terminate the string (trailing 0 not send over IPC). */ 463 path[transferred_size] = 0; 464 return EOK; 465 } 376 466 377 467 /** @}
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