1 /* 2 * Copyright (c) 2004 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 4 * Copyright (c) 2006 Intel Corporation. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include <linux/module.h> 36 #include <linux/err.h> 37 #include <linux/random.h> 38 #include <linux/spinlock.h> 39 #include <linux/slab.h> 40 #include <linux/dma-mapping.h> 41 #include <linux/kref.h> 42 #include <linux/idr.h> 43 #include <linux/workqueue.h> 44 #include <linux/etherdevice.h> 45 #include <rdma/ib_pack.h> 46 #include <rdma/ib_cache.h> 47 #include <rdma/ib_user_sa.h> 48 #include <rdma/ib_marshall.h> 49 #include <rdma/ib_addr.h> 50 #include "sa.h" 51 #include "core_priv.h" 52 53 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100 54 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000 55 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000 56 57 struct ib_sa_sm_ah { 58 struct ib_ah *ah; 59 struct kref ref; 60 u16 pkey_index; 61 u8 src_path_mask; 62 }; 63 64 struct ib_sa_classport_cache { 65 bool valid; 66 struct ib_class_port_info data; 67 }; 68 69 struct ib_sa_port { 70 struct ib_mad_agent *agent; 71 struct ib_sa_sm_ah *sm_ah; 72 struct work_struct update_task; 73 struct ib_sa_classport_cache classport_info; 74 spinlock_t classport_lock; /* protects class port info set */ 75 spinlock_t ah_lock; 76 u8 port_num; 77 }; 78 79 struct ib_sa_device { 80 int start_port, end_port; 81 struct ib_event_handler event_handler; 82 struct ib_sa_port port[0]; 83 }; 84 85 struct ib_sa_query { 86 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *); 87 void (*release)(struct ib_sa_query *); 88 struct ib_sa_client *client; 89 struct ib_sa_port *port; 90 struct ib_mad_send_buf *mad_buf; 91 struct ib_sa_sm_ah *sm_ah; 92 int id; 93 u32 flags; 94 struct list_head list; /* Local svc request list */ 95 u32 seq; /* Local svc request sequence number */ 96 unsigned long timeout; /* Local svc timeout */ 97 u8 path_use; /* How will the pathrecord be used */ 98 }; 99 100 #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001 101 #define IB_SA_CANCEL 0x00000002 102 103 struct ib_sa_service_query { 104 void (*callback)(int, struct ib_sa_service_rec *, void *); 105 void *context; 106 struct ib_sa_query sa_query; 107 }; 108 109 struct ib_sa_path_query { 110 void (*callback)(int, struct ib_sa_path_rec *, void *); 111 void *context; 112 struct ib_sa_query sa_query; 113 }; 114 115 struct ib_sa_guidinfo_query { 116 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *); 117 void *context; 118 struct ib_sa_query sa_query; 119 }; 120 121 struct ib_sa_classport_info_query { 122 void (*callback)(int, struct ib_class_port_info *, void *); 123 void *context; 124 struct ib_sa_query sa_query; 125 }; 126 127 struct ib_sa_mcmember_query { 128 void (*callback)(int, struct ib_sa_mcmember_rec *, void *); 129 void *context; 130 struct ib_sa_query sa_query; 131 }; 132 133 static void ib_sa_add_one(struct ib_device *device); 134 static void ib_sa_remove_one(struct ib_device *device, void *client_data); 135 136 static struct ib_client sa_client = { 137 .name = "sa", 138 .add = ib_sa_add_one, 139 .remove = ib_sa_remove_one 140 }; 141 142 static DEFINE_SPINLOCK(idr_lock); 143 static DEFINE_IDR(query_idr); 144 145 static DEFINE_SPINLOCK(tid_lock); 146 static u32 tid; 147 148 #define PATH_REC_FIELD(field) \ 149 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \ 150 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \ 151 .field_name = "sa_path_rec:" #field 152 153 static const struct ib_field path_rec_table[] = { 154 { PATH_REC_FIELD(service_id), 155 .offset_words = 0, 156 .offset_bits = 0, 157 .size_bits = 64 }, 158 { PATH_REC_FIELD(dgid), 159 .offset_words = 2, 160 .offset_bits = 0, 161 .size_bits = 128 }, 162 { PATH_REC_FIELD(sgid), 163 .offset_words = 6, 164 .offset_bits = 0, 165 .size_bits = 128 }, 166 { PATH_REC_FIELD(dlid), 167 .offset_words = 10, 168 .offset_bits = 0, 169 .size_bits = 16 }, 170 { PATH_REC_FIELD(slid), 171 .offset_words = 10, 172 .offset_bits = 16, 173 .size_bits = 16 }, 174 { PATH_REC_FIELD(raw_traffic), 175 .offset_words = 11, 176 .offset_bits = 0, 177 .size_bits = 1 }, 178 { RESERVED, 179 .offset_words = 11, 180 .offset_bits = 1, 181 .size_bits = 3 }, 182 { PATH_REC_FIELD(flow_label), 183 .offset_words = 11, 184 .offset_bits = 4, 185 .size_bits = 20 }, 186 { PATH_REC_FIELD(hop_limit), 187 .offset_words = 11, 188 .offset_bits = 24, 189 .size_bits = 8 }, 190 { PATH_REC_FIELD(traffic_class), 191 .offset_words = 12, 192 .offset_bits = 0, 193 .size_bits = 8 }, 194 { PATH_REC_FIELD(reversible), 195 .offset_words = 12, 196 .offset_bits = 8, 197 .size_bits = 1 }, 198 { PATH_REC_FIELD(numb_path), 199 .offset_words = 12, 200 .offset_bits = 9, 201 .size_bits = 7 }, 202 { PATH_REC_FIELD(pkey), 203 .offset_words = 12, 204 .offset_bits = 16, 205 .size_bits = 16 }, 206 { PATH_REC_FIELD(qos_class), 207 .offset_words = 13, 208 .offset_bits = 0, 209 .size_bits = 12 }, 210 { PATH_REC_FIELD(sl), 211 .offset_words = 13, 212 .offset_bits = 12, 213 .size_bits = 4 }, 214 { PATH_REC_FIELD(mtu_selector), 215 .offset_words = 13, 216 .offset_bits = 16, 217 .size_bits = 2 }, 218 { PATH_REC_FIELD(mtu), 219 .offset_words = 13, 220 .offset_bits = 18, 221 .size_bits = 6 }, 222 { PATH_REC_FIELD(rate_selector), 223 .offset_words = 13, 224 .offset_bits = 24, 225 .size_bits = 2 }, 226 { PATH_REC_FIELD(rate), 227 .offset_words = 13, 228 .offset_bits = 26, 229 .size_bits = 6 }, 230 { PATH_REC_FIELD(packet_life_time_selector), 231 .offset_words = 14, 232 .offset_bits = 0, 233 .size_bits = 2 }, 234 { PATH_REC_FIELD(packet_life_time), 235 .offset_words = 14, 236 .offset_bits = 2, 237 .size_bits = 6 }, 238 { PATH_REC_FIELD(preference), 239 .offset_words = 14, 240 .offset_bits = 8, 241 .size_bits = 8 }, 242 { RESERVED, 243 .offset_words = 14, 244 .offset_bits = 16, 245 .size_bits = 48 }, 246 }; 247 248 #define MCMEMBER_REC_FIELD(field) \ 249 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ 250 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \ 251 .field_name = "sa_mcmember_rec:" #field 252 253 static const struct ib_field mcmember_rec_table[] = { 254 { MCMEMBER_REC_FIELD(mgid), 255 .offset_words = 0, 256 .offset_bits = 0, 257 .size_bits = 128 }, 258 { MCMEMBER_REC_FIELD(port_gid), 259 .offset_words = 4, 260 .offset_bits = 0, 261 .size_bits = 128 }, 262 { MCMEMBER_REC_FIELD(qkey), 263 .offset_words = 8, 264 .offset_bits = 0, 265 .size_bits = 32 }, 266 { MCMEMBER_REC_FIELD(mlid), 267 .offset_words = 9, 268 .offset_bits = 0, 269 .size_bits = 16 }, 270 { MCMEMBER_REC_FIELD(mtu_selector), 271 .offset_words = 9, 272 .offset_bits = 16, 273 .size_bits = 2 }, 274 { MCMEMBER_REC_FIELD(mtu), 275 .offset_words = 9, 276 .offset_bits = 18, 277 .size_bits = 6 }, 278 { MCMEMBER_REC_FIELD(traffic_class), 279 .offset_words = 9, 280 .offset_bits = 24, 281 .size_bits = 8 }, 282 { MCMEMBER_REC_FIELD(pkey), 283 .offset_words = 10, 284 .offset_bits = 0, 285 .size_bits = 16 }, 286 { MCMEMBER_REC_FIELD(rate_selector), 287 .offset_words = 10, 288 .offset_bits = 16, 289 .size_bits = 2 }, 290 { MCMEMBER_REC_FIELD(rate), 291 .offset_words = 10, 292 .offset_bits = 18, 293 .size_bits = 6 }, 294 { MCMEMBER_REC_FIELD(packet_life_time_selector), 295 .offset_words = 10, 296 .offset_bits = 24, 297 .size_bits = 2 }, 298 { MCMEMBER_REC_FIELD(packet_life_time), 299 .offset_words = 10, 300 .offset_bits = 26, 301 .size_bits = 6 }, 302 { MCMEMBER_REC_FIELD(sl), 303 .offset_words = 11, 304 .offset_bits = 0, 305 .size_bits = 4 }, 306 { MCMEMBER_REC_FIELD(flow_label), 307 .offset_words = 11, 308 .offset_bits = 4, 309 .size_bits = 20 }, 310 { MCMEMBER_REC_FIELD(hop_limit), 311 .offset_words = 11, 312 .offset_bits = 24, 313 .size_bits = 8 }, 314 { MCMEMBER_REC_FIELD(scope), 315 .offset_words = 12, 316 .offset_bits = 0, 317 .size_bits = 4 }, 318 { MCMEMBER_REC_FIELD(join_state), 319 .offset_words = 12, 320 .offset_bits = 4, 321 .size_bits = 4 }, 322 { MCMEMBER_REC_FIELD(proxy_join), 323 .offset_words = 12, 324 .offset_bits = 8, 325 .size_bits = 1 }, 326 { RESERVED, 327 .offset_words = 12, 328 .offset_bits = 9, 329 .size_bits = 23 }, 330 }; 331 332 #define SERVICE_REC_FIELD(field) \ 333 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \ 334 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \ 335 .field_name = "sa_service_rec:" #field 336 337 static const struct ib_field service_rec_table[] = { 338 { SERVICE_REC_FIELD(id), 339 .offset_words = 0, 340 .offset_bits = 0, 341 .size_bits = 64 }, 342 { SERVICE_REC_FIELD(gid), 343 .offset_words = 2, 344 .offset_bits = 0, 345 .size_bits = 128 }, 346 { SERVICE_REC_FIELD(pkey), 347 .offset_words = 6, 348 .offset_bits = 0, 349 .size_bits = 16 }, 350 { SERVICE_REC_FIELD(lease), 351 .offset_words = 7, 352 .offset_bits = 0, 353 .size_bits = 32 }, 354 { SERVICE_REC_FIELD(key), 355 .offset_words = 8, 356 .offset_bits = 0, 357 .size_bits = 128 }, 358 { SERVICE_REC_FIELD(name), 359 .offset_words = 12, 360 .offset_bits = 0, 361 .size_bits = 64*8 }, 362 { SERVICE_REC_FIELD(data8), 363 .offset_words = 28, 364 .offset_bits = 0, 365 .size_bits = 16*8 }, 366 { SERVICE_REC_FIELD(data16), 367 .offset_words = 32, 368 .offset_bits = 0, 369 .size_bits = 8*16 }, 370 { SERVICE_REC_FIELD(data32), 371 .offset_words = 36, 372 .offset_bits = 0, 373 .size_bits = 4*32 }, 374 { SERVICE_REC_FIELD(data64), 375 .offset_words = 40, 376 .offset_bits = 0, 377 .size_bits = 2*64 }, 378 }; 379 380 #define CLASSPORTINFO_REC_FIELD(field) \ 381 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \ 382 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \ 383 .field_name = "ib_class_port_info:" #field 384 385 static const struct ib_field classport_info_rec_table[] = { 386 { CLASSPORTINFO_REC_FIELD(base_version), 387 .offset_words = 0, 388 .offset_bits = 0, 389 .size_bits = 8 }, 390 { CLASSPORTINFO_REC_FIELD(class_version), 391 .offset_words = 0, 392 .offset_bits = 8, 393 .size_bits = 8 }, 394 { CLASSPORTINFO_REC_FIELD(capability_mask), 395 .offset_words = 0, 396 .offset_bits = 16, 397 .size_bits = 16 }, 398 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time), 399 .offset_words = 1, 400 .offset_bits = 0, 401 .size_bits = 32 }, 402 { CLASSPORTINFO_REC_FIELD(redirect_gid), 403 .offset_words = 2, 404 .offset_bits = 0, 405 .size_bits = 128 }, 406 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl), 407 .offset_words = 6, 408 .offset_bits = 0, 409 .size_bits = 32 }, 410 { CLASSPORTINFO_REC_FIELD(redirect_lid), 411 .offset_words = 7, 412 .offset_bits = 0, 413 .size_bits = 16 }, 414 { CLASSPORTINFO_REC_FIELD(redirect_pkey), 415 .offset_words = 7, 416 .offset_bits = 16, 417 .size_bits = 16 }, 418 419 { CLASSPORTINFO_REC_FIELD(redirect_qp), 420 .offset_words = 8, 421 .offset_bits = 0, 422 .size_bits = 32 }, 423 { CLASSPORTINFO_REC_FIELD(redirect_qkey), 424 .offset_words = 9, 425 .offset_bits = 0, 426 .size_bits = 32 }, 427 428 { CLASSPORTINFO_REC_FIELD(trap_gid), 429 .offset_words = 10, 430 .offset_bits = 0, 431 .size_bits = 128 }, 432 { CLASSPORTINFO_REC_FIELD(trap_tcslfl), 433 .offset_words = 14, 434 .offset_bits = 0, 435 .size_bits = 32 }, 436 437 { CLASSPORTINFO_REC_FIELD(trap_lid), 438 .offset_words = 15, 439 .offset_bits = 0, 440 .size_bits = 16 }, 441 { CLASSPORTINFO_REC_FIELD(trap_pkey), 442 .offset_words = 15, 443 .offset_bits = 16, 444 .size_bits = 16 }, 445 446 { CLASSPORTINFO_REC_FIELD(trap_hlqp), 447 .offset_words = 16, 448 .offset_bits = 0, 449 .size_bits = 32 }, 450 { CLASSPORTINFO_REC_FIELD(trap_qkey), 451 .offset_words = 17, 452 .offset_bits = 0, 453 .size_bits = 32 }, 454 }; 455 456 #define GUIDINFO_REC_FIELD(field) \ 457 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \ 458 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \ 459 .field_name = "sa_guidinfo_rec:" #field 460 461 static const struct ib_field guidinfo_rec_table[] = { 462 { GUIDINFO_REC_FIELD(lid), 463 .offset_words = 0, 464 .offset_bits = 0, 465 .size_bits = 16 }, 466 { GUIDINFO_REC_FIELD(block_num), 467 .offset_words = 0, 468 .offset_bits = 16, 469 .size_bits = 8 }, 470 { GUIDINFO_REC_FIELD(res1), 471 .offset_words = 0, 472 .offset_bits = 24, 473 .size_bits = 8 }, 474 { GUIDINFO_REC_FIELD(res2), 475 .offset_words = 1, 476 .offset_bits = 0, 477 .size_bits = 32 }, 478 { GUIDINFO_REC_FIELD(guid_info_list), 479 .offset_words = 2, 480 .offset_bits = 0, 481 .size_bits = 512 }, 482 }; 483 484 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query) 485 { 486 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE; 487 } 488 489 static void free_sm_ah(struct kref *kref) 490 { 491 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); 492 493 ib_destroy_ah(sm_ah->ah); 494 kfree(sm_ah); 495 } 496 497 static void update_sm_ah(struct work_struct *work) 498 { 499 struct ib_sa_port *port = 500 container_of(work, struct ib_sa_port, update_task); 501 struct ib_sa_sm_ah *new_ah; 502 struct ib_port_attr port_attr; 503 struct ib_ah_attr ah_attr; 504 505 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) { 506 pr_warn("Couldn't query port\n"); 507 return; 508 } 509 510 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL); 511 if (!new_ah) { 512 return; 513 } 514 515 kref_init(&new_ah->ref); 516 new_ah->src_path_mask = (1 << port_attr.lmc) - 1; 517 518 new_ah->pkey_index = 0; 519 if (ib_find_pkey(port->agent->device, port->port_num, 520 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index)) 521 pr_err("Couldn't find index for default PKey\n"); 522 523 memset(&ah_attr, 0, sizeof ah_attr); 524 ah_attr.dlid = port_attr.sm_lid; 525 ah_attr.sl = port_attr.sm_sl; 526 ah_attr.port_num = port->port_num; 527 if (port_attr.grh_required) { 528 ah_attr.ah_flags = IB_AH_GRH; 529 ah_attr.grh.dgid.global.subnet_prefix = cpu_to_be64(port_attr.subnet_prefix); 530 ah_attr.grh.dgid.global.interface_id = cpu_to_be64(IB_SA_WELL_KNOWN_GUID); 531 } 532 533 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr); 534 if (IS_ERR(new_ah->ah)) { 535 pr_warn("Couldn't create new SM AH\n"); 536 kfree(new_ah); 537 return; 538 } 539 540 spin_lock_irq(&port->ah_lock); 541 if (port->sm_ah) 542 kref_put(&port->sm_ah->ref, free_sm_ah); 543 port->sm_ah = new_ah; 544 spin_unlock_irq(&port->ah_lock); 545 546 } 547 548 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event) 549 { 550 if (event->event == IB_EVENT_PORT_ERR || 551 event->event == IB_EVENT_PORT_ACTIVE || 552 event->event == IB_EVENT_LID_CHANGE || 553 event->event == IB_EVENT_PKEY_CHANGE || 554 event->event == IB_EVENT_SM_CHANGE || 555 event->event == IB_EVENT_CLIENT_REREGISTER) { 556 unsigned long flags; 557 struct ib_sa_device *sa_dev = 558 container_of(handler, typeof(*sa_dev), event_handler); 559 struct ib_sa_port *port = 560 &sa_dev->port[event->element.port_num - sa_dev->start_port]; 561 562 if (!rdma_cap_ib_sa(handler->device, port->port_num)) 563 return; 564 565 spin_lock_irqsave(&port->ah_lock, flags); 566 if (port->sm_ah) 567 kref_put(&port->sm_ah->ref, free_sm_ah); 568 port->sm_ah = NULL; 569 spin_unlock_irqrestore(&port->ah_lock, flags); 570 571 if (event->event == IB_EVENT_SM_CHANGE || 572 event->event == IB_EVENT_CLIENT_REREGISTER || 573 event->event == IB_EVENT_LID_CHANGE) { 574 spin_lock_irqsave(&port->classport_lock, flags); 575 port->classport_info.valid = false; 576 spin_unlock_irqrestore(&port->classport_lock, flags); 577 } 578 queue_work(ib_wq, &sa_dev->port[event->element.port_num - 579 sa_dev->start_port].update_task); 580 } 581 } 582 583 void ib_sa_register_client(struct ib_sa_client *client) 584 { 585 atomic_set(&client->users, 1); 586 init_completion(&client->comp); 587 } 588 EXPORT_SYMBOL(ib_sa_register_client); 589 590 void ib_sa_unregister_client(struct ib_sa_client *client) 591 { 592 ib_sa_client_put(client); 593 wait_for_completion(&client->comp); 594 } 595 EXPORT_SYMBOL(ib_sa_unregister_client); 596 597 /** 598 * ib_sa_cancel_query - try to cancel an SA query 599 * @id:ID of query to cancel 600 * @query:query pointer to cancel 601 * 602 * Try to cancel an SA query. If the id and query don't match up or 603 * the query has already completed, nothing is done. Otherwise the 604 * query is canceled and will complete with a status of -EINTR. 605 */ 606 void ib_sa_cancel_query(int id, struct ib_sa_query *query) 607 { 608 unsigned long flags; 609 struct ib_mad_agent *agent; 610 struct ib_mad_send_buf *mad_buf; 611 612 spin_lock_irqsave(&idr_lock, flags); 613 if (idr_find(&query_idr, id) != query) { 614 spin_unlock_irqrestore(&idr_lock, flags); 615 return; 616 } 617 agent = query->port->agent; 618 mad_buf = query->mad_buf; 619 spin_unlock_irqrestore(&idr_lock, flags); 620 } 621 EXPORT_SYMBOL(ib_sa_cancel_query); 622 623 static u8 get_src_path_mask(struct ib_device *device, u8 port_num) 624 { 625 struct ib_sa_device *sa_dev; 626 struct ib_sa_port *port; 627 unsigned long flags; 628 u8 src_path_mask; 629 630 sa_dev = ib_get_client_data(device, &sa_client); 631 if (!sa_dev) 632 return 0x7f; 633 634 port = &sa_dev->port[port_num - sa_dev->start_port]; 635 spin_lock_irqsave(&port->ah_lock, flags); 636 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f; 637 spin_unlock_irqrestore(&port->ah_lock, flags); 638 639 return src_path_mask; 640 } 641 642 int ib_init_ah_from_path(struct ib_device *device, u8 port_num, 643 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr) 644 { 645 int ret; 646 u16 gid_index; 647 int use_roce; 648 struct net_device *ndev = NULL; 649 650 memset(ah_attr, 0, sizeof *ah_attr); 651 ah_attr->dlid = be16_to_cpu(rec->dlid); 652 ah_attr->sl = rec->sl; 653 ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 654 get_src_path_mask(device, port_num); 655 ah_attr->port_num = port_num; 656 ah_attr->static_rate = rec->rate; 657 658 use_roce = rdma_cap_eth_ah(device, port_num); 659 660 if (use_roce) { 661 struct net_device *idev; 662 struct net_device *resolved_dev; 663 struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex, 664 .net = rec->net ? rec->net : 665 &init_net}; 666 union { 667 struct sockaddr _sockaddr; 668 struct sockaddr_in _sockaddr_in; 669 struct sockaddr_in6 _sockaddr_in6; 670 } sgid_addr, dgid_addr; 671 672 if (!device->get_netdev) 673 return -EOPNOTSUPP; 674 675 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid); 676 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid); 677 678 /* validate the route */ 679 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr, 680 &dgid_addr._sockaddr, &dev_addr); 681 if (ret) 682 return ret; 683 684 if ((dev_addr.network == RDMA_NETWORK_IPV4 || 685 dev_addr.network == RDMA_NETWORK_IPV6) && 686 rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP) 687 return -EINVAL; 688 689 idev = device->get_netdev(device, port_num); 690 if (!idev) 691 return -ENODEV; 692 693 resolved_dev = dev_get_by_index(dev_addr.net, 694 dev_addr.bound_dev_if); 695 if (resolved_dev->if_flags & IFF_LOOPBACK) { 696 dev_put(resolved_dev); 697 resolved_dev = idev; 698 dev_hold(resolved_dev); 699 } 700 ndev = ib_get_ndev_from_path(rec); 701 rcu_read_lock(); 702 if ((ndev && ndev != resolved_dev) || 703 (resolved_dev != idev && 704 !rdma_is_upper_dev_rcu(idev, resolved_dev))) 705 ret = -EHOSTUNREACH; 706 rcu_read_unlock(); 707 dev_put(idev); 708 dev_put(resolved_dev); 709 if (ret) { 710 if (ndev) 711 dev_put(ndev); 712 return ret; 713 } 714 } 715 716 if (rec->hop_limit > 0 || use_roce) { 717 ah_attr->ah_flags = IB_AH_GRH; 718 ah_attr->grh.dgid = rec->dgid; 719 720 ret = ib_find_cached_gid_by_port(device, &rec->sgid, 721 rec->gid_type, port_num, ndev, 722 &gid_index); 723 if (ret) { 724 if (ndev) 725 dev_put(ndev); 726 return ret; 727 } 728 729 ah_attr->grh.sgid_index = gid_index; 730 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label); 731 ah_attr->grh.hop_limit = rec->hop_limit; 732 ah_attr->grh.traffic_class = rec->traffic_class; 733 if (ndev) 734 dev_put(ndev); 735 } 736 737 if (use_roce) 738 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN); 739 740 return 0; 741 } 742 EXPORT_SYMBOL(ib_init_ah_from_path); 743 744 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask) 745 { 746 unsigned long flags; 747 748 spin_lock_irqsave(&query->port->ah_lock, flags); 749 if (!query->port->sm_ah) { 750 spin_unlock_irqrestore(&query->port->ah_lock, flags); 751 return -EAGAIN; 752 } 753 kref_get(&query->port->sm_ah->ref); 754 query->sm_ah = query->port->sm_ah; 755 spin_unlock_irqrestore(&query->port->ah_lock, flags); 756 757 query->mad_buf = ib_create_send_mad(query->port->agent, 1, 758 query->sm_ah->pkey_index, 759 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA, 760 gfp_mask, 761 IB_MGMT_BASE_VERSION); 762 if (IS_ERR(query->mad_buf)) { 763 kref_put(&query->sm_ah->ref, free_sm_ah); 764 return -ENOMEM; 765 } 766 767 query->mad_buf->ah = query->sm_ah->ah; 768 769 return 0; 770 } 771 772 static void free_mad(struct ib_sa_query *query) 773 { 774 ib_free_send_mad(query->mad_buf); 775 kref_put(&query->sm_ah->ref, free_sm_ah); 776 } 777 778 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent) 779 { 780 unsigned long flags; 781 782 memset(mad, 0, sizeof *mad); 783 784 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; 785 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; 786 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; 787 788 spin_lock_irqsave(&tid_lock, flags); 789 mad->mad_hdr.tid = 790 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); 791 spin_unlock_irqrestore(&tid_lock, flags); 792 } 793 794 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask) 795 { 796 bool preload = gfpflags_allow_blocking(gfp_mask); 797 unsigned long flags; 798 int ret, id; 799 800 if (preload) 801 idr_preload(gfp_mask); 802 spin_lock_irqsave(&idr_lock, flags); 803 804 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT); 805 806 spin_unlock_irqrestore(&idr_lock, flags); 807 if (preload) 808 idr_preload_end(); 809 if (id < 0) 810 return id; 811 812 query->mad_buf->timeout_ms = timeout_ms; 813 query->mad_buf->context[0] = query; 814 query->id = id; 815 816 if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) { 817 ib_sa_disable_local_svc(query); 818 } 819 820 ret = ib_post_send_mad(query->mad_buf, NULL); 821 if (ret) { 822 spin_lock_irqsave(&idr_lock, flags); 823 idr_remove(&query_idr, id); 824 spin_unlock_irqrestore(&idr_lock, flags); 825 } 826 827 /* 828 * It's not safe to dereference query any more, because the 829 * send may already have completed and freed the query in 830 * another context. 831 */ 832 return ret ? ret : id; 833 } 834 835 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec) 836 { 837 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec); 838 } 839 EXPORT_SYMBOL(ib_sa_unpack_path); 840 841 void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute) 842 { 843 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute); 844 } 845 EXPORT_SYMBOL(ib_sa_pack_path); 846 847 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, 848 int status, 849 struct ib_sa_mad *mad) 850 { 851 struct ib_sa_path_query *query = 852 container_of(sa_query, struct ib_sa_path_query, sa_query); 853 854 if (mad) { 855 struct ib_sa_path_rec rec; 856 857 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), 858 mad->data, &rec); 859 rec.net = NULL; 860 rec.ifindex = 0; 861 rec.gid_type = IB_GID_TYPE_IB; 862 eth_zero_addr(rec.dmac); 863 query->callback(status, &rec, query->context); 864 } else 865 query->callback(status, NULL, query->context); 866 } 867 868 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) 869 { 870 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query)); 871 } 872 873 /** 874 * ib_sa_path_rec_get - Start a Path get query 875 * @client:SA client 876 * @device:device to send query on 877 * @port_num: port number to send query on 878 * @rec:Path Record to send in query 879 * @comp_mask:component mask to send in query 880 * @timeout_ms:time to wait for response 881 * @gfp_mask:GFP mask to use for internal allocations 882 * @callback:function called when query completes, times out or is 883 * canceled 884 * @context:opaque user context passed to callback 885 * @sa_query:query context, used to cancel query 886 * 887 * Send a Path Record Get query to the SA to look up a path. The 888 * callback function will be called when the query completes (or 889 * fails); status is 0 for a successful response, -EINTR if the query 890 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 891 * occurred sending the query. The resp parameter of the callback is 892 * only valid if status is 0. 893 * 894 * If the return value of ib_sa_path_rec_get() is negative, it is an 895 * error code. Otherwise it is a query ID that can be used to cancel 896 * the query. 897 */ 898 int ib_sa_path_rec_get(struct ib_sa_client *client, 899 struct ib_device *device, u8 port_num, 900 struct ib_sa_path_rec *rec, 901 ib_sa_comp_mask comp_mask, 902 int timeout_ms, gfp_t gfp_mask, 903 void (*callback)(int status, 904 struct ib_sa_path_rec *resp, 905 void *context), 906 void *context, 907 struct ib_sa_query **sa_query) 908 { 909 struct ib_sa_path_query *query; 910 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 911 struct ib_sa_port *port; 912 struct ib_mad_agent *agent; 913 struct ib_sa_mad *mad; 914 int ret; 915 916 if (!sa_dev) 917 return -ENODEV; 918 919 port = &sa_dev->port[port_num - sa_dev->start_port]; 920 agent = port->agent; 921 922 query = kzalloc(sizeof(*query), gfp_mask); 923 if (!query) 924 return -ENOMEM; 925 926 query->sa_query.port = port; 927 ret = alloc_mad(&query->sa_query, gfp_mask); 928 if (ret) 929 goto err1; 930 931 ib_sa_client_get(client); 932 query->sa_query.client = client; 933 query->callback = callback; 934 query->context = context; 935 936 mad = query->sa_query.mad_buf->mad; 937 init_mad(mad, agent); 938 939 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; 940 query->sa_query.release = ib_sa_path_rec_release; 941 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 942 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); 943 mad->sa_hdr.comp_mask = comp_mask; 944 945 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data); 946 947 *sa_query = &query->sa_query; 948 949 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE; 950 query->sa_query.mad_buf->context[1] = rec; 951 952 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 953 if (ret < 0) 954 goto err2; 955 956 return ret; 957 958 err2: 959 *sa_query = NULL; 960 ib_sa_client_put(query->sa_query.client); 961 free_mad(&query->sa_query); 962 963 err1: 964 kfree(query); 965 return ret; 966 } 967 EXPORT_SYMBOL(ib_sa_path_rec_get); 968 969 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, 970 int status, 971 struct ib_sa_mad *mad) 972 { 973 struct ib_sa_service_query *query = 974 container_of(sa_query, struct ib_sa_service_query, sa_query); 975 976 if (mad) { 977 struct ib_sa_service_rec rec; 978 979 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), 980 mad->data, &rec); 981 query->callback(status, &rec, query->context); 982 } else 983 query->callback(status, NULL, query->context); 984 } 985 986 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) 987 { 988 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); 989 } 990 991 /** 992 * ib_sa_service_rec_query - Start Service Record operation 993 * @client:SA client 994 * @device:device to send request on 995 * @port_num: port number to send request on 996 * @method:SA method - should be get, set, or delete 997 * @rec:Service Record to send in request 998 * @comp_mask:component mask to send in request 999 * @timeout_ms:time to wait for response 1000 * @gfp_mask:GFP mask to use for internal allocations 1001 * @callback:function called when request completes, times out or is 1002 * canceled 1003 * @context:opaque user context passed to callback 1004 * @sa_query:request context, used to cancel request 1005 * 1006 * Send a Service Record set/get/delete to the SA to register, 1007 * unregister or query a service record. 1008 * The callback function will be called when the request completes (or 1009 * fails); status is 0 for a successful response, -EINTR if the query 1010 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 1011 * occurred sending the query. The resp parameter of the callback is 1012 * only valid if status is 0. 1013 * 1014 * If the return value of ib_sa_service_rec_query() is negative, it is an 1015 * error code. Otherwise it is a request ID that can be used to cancel 1016 * the query. 1017 */ 1018 int ib_sa_service_rec_query(struct ib_sa_client *client, 1019 struct ib_device *device, u8 port_num, u8 method, 1020 struct ib_sa_service_rec *rec, 1021 ib_sa_comp_mask comp_mask, 1022 int timeout_ms, gfp_t gfp_mask, 1023 void (*callback)(int status, 1024 struct ib_sa_service_rec *resp, 1025 void *context), 1026 void *context, 1027 struct ib_sa_query **sa_query) 1028 { 1029 struct ib_sa_service_query *query; 1030 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1031 struct ib_sa_port *port; 1032 struct ib_mad_agent *agent; 1033 struct ib_sa_mad *mad; 1034 int ret; 1035 1036 if (!sa_dev) 1037 return -ENODEV; 1038 1039 port = &sa_dev->port[port_num - sa_dev->start_port]; 1040 agent = port->agent; 1041 1042 if (method != IB_MGMT_METHOD_GET && 1043 method != IB_MGMT_METHOD_SET && 1044 method != IB_SA_METHOD_DELETE) 1045 return -EINVAL; 1046 1047 query = kzalloc(sizeof(*query), gfp_mask); 1048 if (!query) 1049 return -ENOMEM; 1050 1051 query->sa_query.port = port; 1052 ret = alloc_mad(&query->sa_query, gfp_mask); 1053 if (ret) 1054 goto err1; 1055 1056 ib_sa_client_get(client); 1057 query->sa_query.client = client; 1058 query->callback = callback; 1059 query->context = context; 1060 1061 mad = query->sa_query.mad_buf->mad; 1062 init_mad(mad, agent); 1063 1064 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; 1065 query->sa_query.release = ib_sa_service_rec_release; 1066 mad->mad_hdr.method = method; 1067 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC); 1068 mad->sa_hdr.comp_mask = comp_mask; 1069 1070 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), 1071 rec, mad->data); 1072 1073 *sa_query = &query->sa_query; 1074 1075 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1076 if (ret < 0) 1077 goto err2; 1078 1079 return ret; 1080 1081 err2: 1082 *sa_query = NULL; 1083 ib_sa_client_put(query->sa_query.client); 1084 free_mad(&query->sa_query); 1085 1086 err1: 1087 kfree(query); 1088 return ret; 1089 } 1090 EXPORT_SYMBOL(ib_sa_service_rec_query); 1091 1092 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, 1093 int status, 1094 struct ib_sa_mad *mad) 1095 { 1096 struct ib_sa_mcmember_query *query = 1097 container_of(sa_query, struct ib_sa_mcmember_query, sa_query); 1098 1099 if (mad) { 1100 struct ib_sa_mcmember_rec rec; 1101 1102 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1103 mad->data, &rec); 1104 query->callback(status, &rec, query->context); 1105 } else 1106 query->callback(status, NULL, query->context); 1107 } 1108 1109 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) 1110 { 1111 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); 1112 } 1113 1114 int ib_sa_mcmember_rec_query(struct ib_sa_client *client, 1115 struct ib_device *device, u8 port_num, 1116 u8 method, 1117 struct ib_sa_mcmember_rec *rec, 1118 ib_sa_comp_mask comp_mask, 1119 int timeout_ms, gfp_t gfp_mask, 1120 void (*callback)(int status, 1121 struct ib_sa_mcmember_rec *resp, 1122 void *context), 1123 void *context, 1124 struct ib_sa_query **sa_query) 1125 { 1126 struct ib_sa_mcmember_query *query; 1127 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1128 struct ib_sa_port *port; 1129 struct ib_mad_agent *agent; 1130 struct ib_sa_mad *mad; 1131 int ret; 1132 1133 if (!sa_dev) 1134 return -ENODEV; 1135 1136 port = &sa_dev->port[port_num - sa_dev->start_port]; 1137 agent = port->agent; 1138 1139 query = kzalloc(sizeof(*query), gfp_mask); 1140 if (!query) 1141 return -ENOMEM; 1142 1143 query->sa_query.port = port; 1144 ret = alloc_mad(&query->sa_query, gfp_mask); 1145 if (ret) 1146 goto err1; 1147 1148 ib_sa_client_get(client); 1149 query->sa_query.client = client; 1150 query->callback = callback; 1151 query->context = context; 1152 1153 mad = query->sa_query.mad_buf->mad; 1154 init_mad(mad, agent); 1155 1156 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; 1157 query->sa_query.release = ib_sa_mcmember_rec_release; 1158 mad->mad_hdr.method = method; 1159 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); 1160 mad->sa_hdr.comp_mask = comp_mask; 1161 1162 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1163 rec, mad->data); 1164 1165 *sa_query = &query->sa_query; 1166 1167 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1168 if (ret < 0) 1169 goto err2; 1170 1171 return ret; 1172 1173 err2: 1174 *sa_query = NULL; 1175 ib_sa_client_put(query->sa_query.client); 1176 free_mad(&query->sa_query); 1177 1178 err1: 1179 kfree(query); 1180 return ret; 1181 } 1182 1183 /* Support GuidInfoRecord */ 1184 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query, 1185 int status, 1186 struct ib_sa_mad *mad) 1187 { 1188 struct ib_sa_guidinfo_query *query = 1189 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query); 1190 1191 if (mad) { 1192 struct ib_sa_guidinfo_rec rec; 1193 1194 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), 1195 mad->data, &rec); 1196 query->callback(status, &rec, query->context); 1197 } else 1198 query->callback(status, NULL, query->context); 1199 } 1200 1201 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query) 1202 { 1203 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query)); 1204 } 1205 1206 int ib_sa_guid_info_rec_query(struct ib_sa_client *client, 1207 struct ib_device *device, u8 port_num, 1208 struct ib_sa_guidinfo_rec *rec, 1209 ib_sa_comp_mask comp_mask, u8 method, 1210 int timeout_ms, gfp_t gfp_mask, 1211 void (*callback)(int status, 1212 struct ib_sa_guidinfo_rec *resp, 1213 void *context), 1214 void *context, 1215 struct ib_sa_query **sa_query) 1216 { 1217 struct ib_sa_guidinfo_query *query; 1218 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1219 struct ib_sa_port *port; 1220 struct ib_mad_agent *agent; 1221 struct ib_sa_mad *mad; 1222 int ret; 1223 1224 if (!sa_dev) 1225 return -ENODEV; 1226 1227 if (method != IB_MGMT_METHOD_GET && 1228 method != IB_MGMT_METHOD_SET && 1229 method != IB_SA_METHOD_DELETE) { 1230 return -EINVAL; 1231 } 1232 1233 port = &sa_dev->port[port_num - sa_dev->start_port]; 1234 agent = port->agent; 1235 1236 query = kzalloc(sizeof(*query), gfp_mask); 1237 if (!query) 1238 return -ENOMEM; 1239 1240 query->sa_query.port = port; 1241 ret = alloc_mad(&query->sa_query, gfp_mask); 1242 if (ret) 1243 goto err1; 1244 1245 ib_sa_client_get(client); 1246 query->sa_query.client = client; 1247 query->callback = callback; 1248 query->context = context; 1249 1250 mad = query->sa_query.mad_buf->mad; 1251 init_mad(mad, agent); 1252 1253 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL; 1254 query->sa_query.release = ib_sa_guidinfo_rec_release; 1255 1256 mad->mad_hdr.method = method; 1257 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC); 1258 mad->sa_hdr.comp_mask = comp_mask; 1259 1260 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec, 1261 mad->data); 1262 1263 *sa_query = &query->sa_query; 1264 1265 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1266 if (ret < 0) 1267 goto err2; 1268 1269 return ret; 1270 1271 err2: 1272 *sa_query = NULL; 1273 ib_sa_client_put(query->sa_query.client); 1274 free_mad(&query->sa_query); 1275 1276 err1: 1277 kfree(query); 1278 return ret; 1279 } 1280 EXPORT_SYMBOL(ib_sa_guid_info_rec_query); 1281 1282 /* Support get SA ClassPortInfo */ 1283 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query, 1284 int status, 1285 struct ib_sa_mad *mad) 1286 { 1287 unsigned long flags; 1288 struct ib_sa_classport_info_query *query = 1289 container_of(sa_query, struct ib_sa_classport_info_query, sa_query); 1290 1291 if (mad) { 1292 struct ib_class_port_info rec; 1293 1294 ib_unpack(classport_info_rec_table, 1295 ARRAY_SIZE(classport_info_rec_table), 1296 mad->data, &rec); 1297 1298 spin_lock_irqsave(&sa_query->port->classport_lock, flags); 1299 if (!status && !sa_query->port->classport_info.valid) { 1300 memcpy(&sa_query->port->classport_info.data, &rec, 1301 sizeof(sa_query->port->classport_info.data)); 1302 1303 sa_query->port->classport_info.valid = true; 1304 } 1305 spin_unlock_irqrestore(&sa_query->port->classport_lock, flags); 1306 1307 query->callback(status, &rec, query->context); 1308 } else { 1309 query->callback(status, NULL, query->context); 1310 } 1311 } 1312 1313 static void ib_sa_portclass_info_rec_release(struct ib_sa_query *sa_query) 1314 { 1315 kfree(container_of(sa_query, struct ib_sa_classport_info_query, 1316 sa_query)); 1317 } 1318 1319 int ib_sa_classport_info_rec_query(struct ib_sa_client *client, 1320 struct ib_device *device, u8 port_num, 1321 int timeout_ms, gfp_t gfp_mask, 1322 void (*callback)(int status, 1323 struct ib_class_port_info *resp, 1324 void *context), 1325 void *context, 1326 struct ib_sa_query **sa_query) 1327 { 1328 struct ib_sa_classport_info_query *query; 1329 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1330 struct ib_sa_port *port; 1331 struct ib_mad_agent *agent; 1332 struct ib_sa_mad *mad; 1333 struct ib_class_port_info cached_class_port_info; 1334 int ret; 1335 unsigned long flags; 1336 1337 if (!sa_dev) 1338 return -ENODEV; 1339 1340 port = &sa_dev->port[port_num - sa_dev->start_port]; 1341 agent = port->agent; 1342 1343 /* Use cached ClassPortInfo attribute if valid instead of sending mad */ 1344 spin_lock_irqsave(&port->classport_lock, flags); 1345 if (port->classport_info.valid && callback) { 1346 memcpy(&cached_class_port_info, &port->classport_info.data, 1347 sizeof(cached_class_port_info)); 1348 spin_unlock_irqrestore(&port->classport_lock, flags); 1349 callback(0, &cached_class_port_info, context); 1350 return 0; 1351 } 1352 spin_unlock_irqrestore(&port->classport_lock, flags); 1353 1354 query = kzalloc(sizeof(*query), gfp_mask); 1355 if (!query) 1356 return -ENOMEM; 1357 1358 query->sa_query.port = port; 1359 ret = alloc_mad(&query->sa_query, gfp_mask); 1360 if (ret) 1361 goto err1; 1362 1363 ib_sa_client_get(client); 1364 query->sa_query.client = client; 1365 query->callback = callback; 1366 query->context = context; 1367 1368 mad = query->sa_query.mad_buf->mad; 1369 init_mad(mad, agent); 1370 1371 query->sa_query.callback = callback ? ib_sa_classport_info_rec_callback : NULL; 1372 1373 query->sa_query.release = ib_sa_portclass_info_rec_release; 1374 /* support GET only */ 1375 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 1376 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO); 1377 mad->sa_hdr.comp_mask = 0; 1378 *sa_query = &query->sa_query; 1379 1380 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1381 if (ret < 0) 1382 goto err2; 1383 1384 return ret; 1385 1386 err2: 1387 *sa_query = NULL; 1388 ib_sa_client_put(query->sa_query.client); 1389 free_mad(&query->sa_query); 1390 1391 err1: 1392 kfree(query); 1393 return ret; 1394 } 1395 EXPORT_SYMBOL(ib_sa_classport_info_rec_query); 1396 1397 static void send_handler(struct ib_mad_agent *agent, 1398 struct ib_mad_send_wc *mad_send_wc) 1399 { 1400 struct ib_sa_query *query = mad_send_wc->send_buf->context[0]; 1401 unsigned long flags; 1402 1403 if (query->callback) 1404 switch (mad_send_wc->status) { 1405 case IB_WC_SUCCESS: 1406 /* No callback -- already got recv */ 1407 break; 1408 case IB_WC_RESP_TIMEOUT_ERR: 1409 query->callback(query, -ETIMEDOUT, NULL); 1410 break; 1411 case IB_WC_WR_FLUSH_ERR: 1412 query->callback(query, -EINTR, NULL); 1413 break; 1414 default: 1415 query->callback(query, -EIO, NULL); 1416 break; 1417 } 1418 1419 spin_lock_irqsave(&idr_lock, flags); 1420 idr_remove(&query_idr, query->id); 1421 spin_unlock_irqrestore(&idr_lock, flags); 1422 1423 free_mad(query); 1424 ib_sa_client_put(query->client); 1425 query->release(query); 1426 } 1427 1428 static void recv_handler(struct ib_mad_agent *mad_agent, 1429 struct ib_mad_send_buf *send_buf, 1430 struct ib_mad_recv_wc *mad_recv_wc) 1431 { 1432 struct ib_sa_query *query; 1433 1434 if (!send_buf) 1435 return; 1436 1437 query = send_buf->context[0]; 1438 if (query->callback) { 1439 if (mad_recv_wc->wc->status == IB_WC_SUCCESS) 1440 query->callback(query, 1441 mad_recv_wc->recv_buf.mad->mad_hdr.status ? 1442 -EINVAL : 0, 1443 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); 1444 else 1445 query->callback(query, -EIO, NULL); 1446 } 1447 1448 ib_free_recv_mad(mad_recv_wc); 1449 } 1450 1451 static void ib_sa_add_one(struct ib_device *device) 1452 { 1453 struct ib_sa_device *sa_dev; 1454 int s, e, i; 1455 int count = 0; 1456 1457 s = rdma_start_port(device); 1458 e = rdma_end_port(device); 1459 1460 sa_dev = kzalloc(sizeof *sa_dev + 1461 (e - s + 1) * sizeof (struct ib_sa_port), 1462 GFP_KERNEL); 1463 if (!sa_dev) 1464 return; 1465 1466 sa_dev->start_port = s; 1467 sa_dev->end_port = e; 1468 1469 for (i = 0; i <= e - s; ++i) { 1470 spin_lock_init(&sa_dev->port[i].ah_lock); 1471 if (!rdma_cap_ib_sa(device, i + 1)) 1472 continue; 1473 1474 sa_dev->port[i].sm_ah = NULL; 1475 sa_dev->port[i].port_num = i + s; 1476 1477 spin_lock_init(&sa_dev->port[i].classport_lock); 1478 sa_dev->port[i].classport_info.valid = false; 1479 1480 sa_dev->port[i].agent = 1481 ib_register_mad_agent(device, i + s, IB_QPT_GSI, 1482 NULL, 0, send_handler, 1483 recv_handler, sa_dev, 0); 1484 if (IS_ERR(sa_dev->port[i].agent)) 1485 goto err; 1486 1487 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah); 1488 1489 count++; 1490 } 1491 1492 if (!count) 1493 goto free; 1494 1495 ib_set_client_data(device, &sa_client, sa_dev); 1496 1497 /* 1498 * We register our event handler after everything is set up, 1499 * and then update our cached info after the event handler is 1500 * registered to avoid any problems if a port changes state 1501 * during our initialization. 1502 */ 1503 1504 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); 1505 if (ib_register_event_handler(&sa_dev->event_handler)) 1506 goto err; 1507 1508 for (i = 0; i <= e - s; ++i) { 1509 if (rdma_cap_ib_sa(device, i + 1)) 1510 update_sm_ah(&sa_dev->port[i].update_task); 1511 } 1512 1513 return; 1514 1515 err: 1516 while (--i >= 0) { 1517 if (rdma_cap_ib_sa(device, i + 1)) 1518 ib_unregister_mad_agent(sa_dev->port[i].agent); 1519 } 1520 free: 1521 kfree(sa_dev); 1522 return; 1523 } 1524 1525 static void ib_sa_remove_one(struct ib_device *device, void *client_data) 1526 { 1527 struct ib_sa_device *sa_dev = client_data; 1528 int i; 1529 1530 if (!sa_dev) 1531 return; 1532 1533 ib_unregister_event_handler(&sa_dev->event_handler); 1534 1535 flush_workqueue(ib_wq); 1536 1537 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { 1538 if (rdma_cap_ib_sa(device, i + 1)) { 1539 ib_unregister_mad_agent(sa_dev->port[i].agent); 1540 if (sa_dev->port[i].sm_ah) 1541 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); 1542 } 1543 1544 } 1545 1546 kfree(sa_dev); 1547 } 1548 1549 int ib_sa_init(void) 1550 { 1551 int ret; 1552 1553 get_random_bytes(&tid, sizeof tid); 1554 1555 ret = ib_register_client(&sa_client); 1556 if (ret) { 1557 pr_err("Couldn't register ib_sa client\n"); 1558 goto err1; 1559 } 1560 1561 ret = mcast_init(); 1562 if (ret) { 1563 pr_err("Couldn't initialize multicast handling\n"); 1564 goto err2; 1565 } 1566 1567 return 0; 1568 1569 err2: 1570 ib_unregister_client(&sa_client); 1571 err1: 1572 return ret; 1573 } 1574 1575 void ib_sa_cleanup(void) 1576 { 1577 mcast_cleanup(); 1578 ib_unregister_client(&sa_client); 1579 idr_destroy(&query_idr); 1580 } 1581