1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004 Topspin Communications. All rights reserved. 5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 6 * Copyright (c) 2006 Intel Corporation. All rights reserved. 7 * 8 * This software is available to you under a choice of one of two 9 * licenses. You may choose to be licensed under the terms of the GNU 10 * General Public License (GPL) Version 2, available from the file 11 * COPYING in the main directory of this source tree, or the 12 * OpenIB.org BSD license below: 13 * 14 * Redistribution and use in source and binary forms, with or 15 * without modification, are permitted provided that the following 16 * conditions are met: 17 * 18 * - Redistributions of source code must retain the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer. 21 * 22 * - Redistributions in binary form must reproduce the above 23 * copyright notice, this list of conditions and the following 24 * disclaimer in the documentation and/or other materials 25 * provided with the distribution. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 34 * SOFTWARE. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <linux/module.h> 41 #include <linux/err.h> 42 #include <linux/random.h> 43 #include <linux/spinlock.h> 44 #include <linux/slab.h> 45 #include <linux/dma-mapping.h> 46 #include <linux/kref.h> 47 #include <linux/idr.h> 48 #include <linux/workqueue.h> 49 #include <linux/etherdevice.h> 50 #include <rdma/ib_pack.h> 51 #include <rdma/ib_cache.h> 52 #include <rdma/ib_user_sa.h> 53 #include <rdma/ib_marshall.h> 54 #include <rdma/ib_addr.h> 55 #include "sa.h" 56 #include "core_priv.h" 57 58 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100 59 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000 60 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000 61 62 struct ib_sa_sm_ah { 63 struct ib_ah *ah; 64 struct kref ref; 65 u16 pkey_index; 66 u8 src_path_mask; 67 }; 68 69 struct ib_sa_classport_cache { 70 bool valid; 71 struct ib_class_port_info data; 72 }; 73 74 struct ib_sa_port { 75 struct ib_mad_agent *agent; 76 struct ib_sa_sm_ah *sm_ah; 77 struct work_struct update_task; 78 struct ib_sa_classport_cache classport_info; 79 spinlock_t classport_lock; /* protects class port info set */ 80 spinlock_t ah_lock; 81 u8 port_num; 82 }; 83 84 struct ib_sa_device { 85 int start_port, end_port; 86 struct ib_event_handler event_handler; 87 struct ib_sa_port port[0]; 88 }; 89 90 struct ib_sa_query { 91 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *); 92 void (*release)(struct ib_sa_query *); 93 struct ib_sa_client *client; 94 struct ib_sa_port *port; 95 struct ib_mad_send_buf *mad_buf; 96 struct ib_sa_sm_ah *sm_ah; 97 int id; 98 u32 flags; 99 struct list_head list; /* Local svc request list */ 100 u32 seq; /* Local svc request sequence number */ 101 unsigned long timeout; /* Local svc timeout */ 102 u8 path_use; /* How will the pathrecord be used */ 103 }; 104 105 #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001 106 #define IB_SA_CANCEL 0x00000002 107 108 struct ib_sa_service_query { 109 void (*callback)(int, struct ib_sa_service_rec *, void *); 110 void *context; 111 struct ib_sa_query sa_query; 112 }; 113 114 struct ib_sa_path_query { 115 void (*callback)(int, struct ib_sa_path_rec *, void *); 116 void *context; 117 struct ib_sa_query sa_query; 118 }; 119 120 struct ib_sa_guidinfo_query { 121 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *); 122 void *context; 123 struct ib_sa_query sa_query; 124 }; 125 126 struct ib_sa_classport_info_query { 127 void (*callback)(int, struct ib_class_port_info *, void *); 128 void *context; 129 struct ib_sa_query sa_query; 130 }; 131 132 struct ib_sa_mcmember_query { 133 void (*callback)(int, struct ib_sa_mcmember_rec *, void *); 134 void *context; 135 struct ib_sa_query sa_query; 136 }; 137 138 static void ib_sa_add_one(struct ib_device *device); 139 static void ib_sa_remove_one(struct ib_device *device, void *client_data); 140 141 static struct ib_client sa_client = { 142 .name = "sa", 143 .add = ib_sa_add_one, 144 .remove = ib_sa_remove_one 145 }; 146 147 static DEFINE_SPINLOCK(idr_lock); 148 static DEFINE_IDR(query_idr); 149 150 static DEFINE_SPINLOCK(tid_lock); 151 static u32 tid; 152 153 #define PATH_REC_FIELD(field) \ 154 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \ 155 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \ 156 .field_name = "sa_path_rec:" #field 157 158 static const struct ib_field path_rec_table[] = { 159 { PATH_REC_FIELD(service_id), 160 .offset_words = 0, 161 .offset_bits = 0, 162 .size_bits = 64 }, 163 { PATH_REC_FIELD(dgid), 164 .offset_words = 2, 165 .offset_bits = 0, 166 .size_bits = 128 }, 167 { PATH_REC_FIELD(sgid), 168 .offset_words = 6, 169 .offset_bits = 0, 170 .size_bits = 128 }, 171 { PATH_REC_FIELD(dlid), 172 .offset_words = 10, 173 .offset_bits = 0, 174 .size_bits = 16 }, 175 { PATH_REC_FIELD(slid), 176 .offset_words = 10, 177 .offset_bits = 16, 178 .size_bits = 16 }, 179 { PATH_REC_FIELD(raw_traffic), 180 .offset_words = 11, 181 .offset_bits = 0, 182 .size_bits = 1 }, 183 { RESERVED, 184 .offset_words = 11, 185 .offset_bits = 1, 186 .size_bits = 3 }, 187 { PATH_REC_FIELD(flow_label), 188 .offset_words = 11, 189 .offset_bits = 4, 190 .size_bits = 20 }, 191 { PATH_REC_FIELD(hop_limit), 192 .offset_words = 11, 193 .offset_bits = 24, 194 .size_bits = 8 }, 195 { PATH_REC_FIELD(traffic_class), 196 .offset_words = 12, 197 .offset_bits = 0, 198 .size_bits = 8 }, 199 { PATH_REC_FIELD(reversible), 200 .offset_words = 12, 201 .offset_bits = 8, 202 .size_bits = 1 }, 203 { PATH_REC_FIELD(numb_path), 204 .offset_words = 12, 205 .offset_bits = 9, 206 .size_bits = 7 }, 207 { PATH_REC_FIELD(pkey), 208 .offset_words = 12, 209 .offset_bits = 16, 210 .size_bits = 16 }, 211 { PATH_REC_FIELD(qos_class), 212 .offset_words = 13, 213 .offset_bits = 0, 214 .size_bits = 12 }, 215 { PATH_REC_FIELD(sl), 216 .offset_words = 13, 217 .offset_bits = 12, 218 .size_bits = 4 }, 219 { PATH_REC_FIELD(mtu_selector), 220 .offset_words = 13, 221 .offset_bits = 16, 222 .size_bits = 2 }, 223 { PATH_REC_FIELD(mtu), 224 .offset_words = 13, 225 .offset_bits = 18, 226 .size_bits = 6 }, 227 { PATH_REC_FIELD(rate_selector), 228 .offset_words = 13, 229 .offset_bits = 24, 230 .size_bits = 2 }, 231 { PATH_REC_FIELD(rate), 232 .offset_words = 13, 233 .offset_bits = 26, 234 .size_bits = 6 }, 235 { PATH_REC_FIELD(packet_life_time_selector), 236 .offset_words = 14, 237 .offset_bits = 0, 238 .size_bits = 2 }, 239 { PATH_REC_FIELD(packet_life_time), 240 .offset_words = 14, 241 .offset_bits = 2, 242 .size_bits = 6 }, 243 { PATH_REC_FIELD(preference), 244 .offset_words = 14, 245 .offset_bits = 8, 246 .size_bits = 8 }, 247 { RESERVED, 248 .offset_words = 14, 249 .offset_bits = 16, 250 .size_bits = 48 }, 251 }; 252 253 #define MCMEMBER_REC_FIELD(field) \ 254 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ 255 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \ 256 .field_name = "sa_mcmember_rec:" #field 257 258 static const struct ib_field mcmember_rec_table[] = { 259 { MCMEMBER_REC_FIELD(mgid), 260 .offset_words = 0, 261 .offset_bits = 0, 262 .size_bits = 128 }, 263 { MCMEMBER_REC_FIELD(port_gid), 264 .offset_words = 4, 265 .offset_bits = 0, 266 .size_bits = 128 }, 267 { MCMEMBER_REC_FIELD(qkey), 268 .offset_words = 8, 269 .offset_bits = 0, 270 .size_bits = 32 }, 271 { MCMEMBER_REC_FIELD(mlid), 272 .offset_words = 9, 273 .offset_bits = 0, 274 .size_bits = 16 }, 275 { MCMEMBER_REC_FIELD(mtu_selector), 276 .offset_words = 9, 277 .offset_bits = 16, 278 .size_bits = 2 }, 279 { MCMEMBER_REC_FIELD(mtu), 280 .offset_words = 9, 281 .offset_bits = 18, 282 .size_bits = 6 }, 283 { MCMEMBER_REC_FIELD(traffic_class), 284 .offset_words = 9, 285 .offset_bits = 24, 286 .size_bits = 8 }, 287 { MCMEMBER_REC_FIELD(pkey), 288 .offset_words = 10, 289 .offset_bits = 0, 290 .size_bits = 16 }, 291 { MCMEMBER_REC_FIELD(rate_selector), 292 .offset_words = 10, 293 .offset_bits = 16, 294 .size_bits = 2 }, 295 { MCMEMBER_REC_FIELD(rate), 296 .offset_words = 10, 297 .offset_bits = 18, 298 .size_bits = 6 }, 299 { MCMEMBER_REC_FIELD(packet_life_time_selector), 300 .offset_words = 10, 301 .offset_bits = 24, 302 .size_bits = 2 }, 303 { MCMEMBER_REC_FIELD(packet_life_time), 304 .offset_words = 10, 305 .offset_bits = 26, 306 .size_bits = 6 }, 307 { MCMEMBER_REC_FIELD(sl), 308 .offset_words = 11, 309 .offset_bits = 0, 310 .size_bits = 4 }, 311 { MCMEMBER_REC_FIELD(flow_label), 312 .offset_words = 11, 313 .offset_bits = 4, 314 .size_bits = 20 }, 315 { MCMEMBER_REC_FIELD(hop_limit), 316 .offset_words = 11, 317 .offset_bits = 24, 318 .size_bits = 8 }, 319 { MCMEMBER_REC_FIELD(scope), 320 .offset_words = 12, 321 .offset_bits = 0, 322 .size_bits = 4 }, 323 { MCMEMBER_REC_FIELD(join_state), 324 .offset_words = 12, 325 .offset_bits = 4, 326 .size_bits = 4 }, 327 { MCMEMBER_REC_FIELD(proxy_join), 328 .offset_words = 12, 329 .offset_bits = 8, 330 .size_bits = 1 }, 331 { RESERVED, 332 .offset_words = 12, 333 .offset_bits = 9, 334 .size_bits = 23 }, 335 }; 336 337 #define SERVICE_REC_FIELD(field) \ 338 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \ 339 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \ 340 .field_name = "sa_service_rec:" #field 341 342 static const struct ib_field service_rec_table[] = { 343 { SERVICE_REC_FIELD(id), 344 .offset_words = 0, 345 .offset_bits = 0, 346 .size_bits = 64 }, 347 { SERVICE_REC_FIELD(gid), 348 .offset_words = 2, 349 .offset_bits = 0, 350 .size_bits = 128 }, 351 { SERVICE_REC_FIELD(pkey), 352 .offset_words = 6, 353 .offset_bits = 0, 354 .size_bits = 16 }, 355 { SERVICE_REC_FIELD(lease), 356 .offset_words = 7, 357 .offset_bits = 0, 358 .size_bits = 32 }, 359 { SERVICE_REC_FIELD(key), 360 .offset_words = 8, 361 .offset_bits = 0, 362 .size_bits = 128 }, 363 { SERVICE_REC_FIELD(name), 364 .offset_words = 12, 365 .offset_bits = 0, 366 .size_bits = 64*8 }, 367 { SERVICE_REC_FIELD(data8), 368 .offset_words = 28, 369 .offset_bits = 0, 370 .size_bits = 16*8 }, 371 { SERVICE_REC_FIELD(data16), 372 .offset_words = 32, 373 .offset_bits = 0, 374 .size_bits = 8*16 }, 375 { SERVICE_REC_FIELD(data32), 376 .offset_words = 36, 377 .offset_bits = 0, 378 .size_bits = 4*32 }, 379 { SERVICE_REC_FIELD(data64), 380 .offset_words = 40, 381 .offset_bits = 0, 382 .size_bits = 2*64 }, 383 }; 384 385 #define CLASSPORTINFO_REC_FIELD(field) \ 386 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \ 387 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \ 388 .field_name = "ib_class_port_info:" #field 389 390 static const struct ib_field classport_info_rec_table[] = { 391 { CLASSPORTINFO_REC_FIELD(base_version), 392 .offset_words = 0, 393 .offset_bits = 0, 394 .size_bits = 8 }, 395 { CLASSPORTINFO_REC_FIELD(class_version), 396 .offset_words = 0, 397 .offset_bits = 8, 398 .size_bits = 8 }, 399 { CLASSPORTINFO_REC_FIELD(capability_mask), 400 .offset_words = 0, 401 .offset_bits = 16, 402 .size_bits = 16 }, 403 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time), 404 .offset_words = 1, 405 .offset_bits = 0, 406 .size_bits = 32 }, 407 { CLASSPORTINFO_REC_FIELD(redirect_gid), 408 .offset_words = 2, 409 .offset_bits = 0, 410 .size_bits = 128 }, 411 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl), 412 .offset_words = 6, 413 .offset_bits = 0, 414 .size_bits = 32 }, 415 { CLASSPORTINFO_REC_FIELD(redirect_lid), 416 .offset_words = 7, 417 .offset_bits = 0, 418 .size_bits = 16 }, 419 { CLASSPORTINFO_REC_FIELD(redirect_pkey), 420 .offset_words = 7, 421 .offset_bits = 16, 422 .size_bits = 16 }, 423 424 { CLASSPORTINFO_REC_FIELD(redirect_qp), 425 .offset_words = 8, 426 .offset_bits = 0, 427 .size_bits = 32 }, 428 { CLASSPORTINFO_REC_FIELD(redirect_qkey), 429 .offset_words = 9, 430 .offset_bits = 0, 431 .size_bits = 32 }, 432 433 { CLASSPORTINFO_REC_FIELD(trap_gid), 434 .offset_words = 10, 435 .offset_bits = 0, 436 .size_bits = 128 }, 437 { CLASSPORTINFO_REC_FIELD(trap_tcslfl), 438 .offset_words = 14, 439 .offset_bits = 0, 440 .size_bits = 32 }, 441 442 { CLASSPORTINFO_REC_FIELD(trap_lid), 443 .offset_words = 15, 444 .offset_bits = 0, 445 .size_bits = 16 }, 446 { CLASSPORTINFO_REC_FIELD(trap_pkey), 447 .offset_words = 15, 448 .offset_bits = 16, 449 .size_bits = 16 }, 450 451 { CLASSPORTINFO_REC_FIELD(trap_hlqp), 452 .offset_words = 16, 453 .offset_bits = 0, 454 .size_bits = 32 }, 455 { CLASSPORTINFO_REC_FIELD(trap_qkey), 456 .offset_words = 17, 457 .offset_bits = 0, 458 .size_bits = 32 }, 459 }; 460 461 #define GUIDINFO_REC_FIELD(field) \ 462 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \ 463 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \ 464 .field_name = "sa_guidinfo_rec:" #field 465 466 static const struct ib_field guidinfo_rec_table[] = { 467 { GUIDINFO_REC_FIELD(lid), 468 .offset_words = 0, 469 .offset_bits = 0, 470 .size_bits = 16 }, 471 { GUIDINFO_REC_FIELD(block_num), 472 .offset_words = 0, 473 .offset_bits = 16, 474 .size_bits = 8 }, 475 { GUIDINFO_REC_FIELD(res1), 476 .offset_words = 0, 477 .offset_bits = 24, 478 .size_bits = 8 }, 479 { GUIDINFO_REC_FIELD(res2), 480 .offset_words = 1, 481 .offset_bits = 0, 482 .size_bits = 32 }, 483 { GUIDINFO_REC_FIELD(guid_info_list), 484 .offset_words = 2, 485 .offset_bits = 0, 486 .size_bits = 512 }, 487 }; 488 489 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query) 490 { 491 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE; 492 } 493 494 static void free_sm_ah(struct kref *kref) 495 { 496 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); 497 498 ib_destroy_ah(sm_ah->ah); 499 kfree(sm_ah); 500 } 501 502 static void update_sm_ah(struct work_struct *work) 503 { 504 struct ib_sa_port *port = 505 container_of(work, struct ib_sa_port, update_task); 506 struct ib_sa_sm_ah *new_ah; 507 struct ib_port_attr port_attr; 508 struct ib_ah_attr ah_attr; 509 510 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) { 511 pr_warn("Couldn't query port\n"); 512 return; 513 } 514 515 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL); 516 if (!new_ah) { 517 return; 518 } 519 520 kref_init(&new_ah->ref); 521 new_ah->src_path_mask = (1 << port_attr.lmc) - 1; 522 523 new_ah->pkey_index = 0; 524 if (ib_find_pkey(port->agent->device, port->port_num, 525 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index)) 526 pr_err("Couldn't find index for default PKey\n"); 527 528 memset(&ah_attr, 0, sizeof ah_attr); 529 ah_attr.dlid = port_attr.sm_lid; 530 ah_attr.sl = port_attr.sm_sl; 531 ah_attr.port_num = port->port_num; 532 if (port_attr.grh_required) { 533 ah_attr.ah_flags = IB_AH_GRH; 534 ah_attr.grh.dgid.global.subnet_prefix = cpu_to_be64(port_attr.subnet_prefix); 535 ah_attr.grh.dgid.global.interface_id = cpu_to_be64(IB_SA_WELL_KNOWN_GUID); 536 } 537 538 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr); 539 if (IS_ERR(new_ah->ah)) { 540 pr_warn("Couldn't create new SM AH\n"); 541 kfree(new_ah); 542 return; 543 } 544 545 spin_lock_irq(&port->ah_lock); 546 if (port->sm_ah) 547 kref_put(&port->sm_ah->ref, free_sm_ah); 548 port->sm_ah = new_ah; 549 spin_unlock_irq(&port->ah_lock); 550 551 } 552 553 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event) 554 { 555 if (event->event == IB_EVENT_PORT_ERR || 556 event->event == IB_EVENT_PORT_ACTIVE || 557 event->event == IB_EVENT_LID_CHANGE || 558 event->event == IB_EVENT_PKEY_CHANGE || 559 event->event == IB_EVENT_SM_CHANGE || 560 event->event == IB_EVENT_CLIENT_REREGISTER) { 561 unsigned long flags; 562 struct ib_sa_device *sa_dev = 563 container_of(handler, typeof(*sa_dev), event_handler); 564 struct ib_sa_port *port = 565 &sa_dev->port[event->element.port_num - sa_dev->start_port]; 566 567 if (!rdma_cap_ib_sa(handler->device, port->port_num)) 568 return; 569 570 spin_lock_irqsave(&port->ah_lock, flags); 571 if (port->sm_ah) 572 kref_put(&port->sm_ah->ref, free_sm_ah); 573 port->sm_ah = NULL; 574 spin_unlock_irqrestore(&port->ah_lock, flags); 575 576 if (event->event == IB_EVENT_SM_CHANGE || 577 event->event == IB_EVENT_CLIENT_REREGISTER || 578 event->event == IB_EVENT_LID_CHANGE) { 579 spin_lock_irqsave(&port->classport_lock, flags); 580 port->classport_info.valid = false; 581 spin_unlock_irqrestore(&port->classport_lock, flags); 582 } 583 queue_work(ib_wq, &sa_dev->port[event->element.port_num - 584 sa_dev->start_port].update_task); 585 } 586 } 587 588 void ib_sa_register_client(struct ib_sa_client *client) 589 { 590 atomic_set(&client->users, 1); 591 init_completion(&client->comp); 592 } 593 EXPORT_SYMBOL(ib_sa_register_client); 594 595 void ib_sa_unregister_client(struct ib_sa_client *client) 596 { 597 ib_sa_client_put(client); 598 wait_for_completion(&client->comp); 599 } 600 EXPORT_SYMBOL(ib_sa_unregister_client); 601 602 /** 603 * ib_sa_cancel_query - try to cancel an SA query 604 * @id:ID of query to cancel 605 * @query:query pointer to cancel 606 * 607 * Try to cancel an SA query. If the id and query don't match up or 608 * the query has already completed, nothing is done. Otherwise the 609 * query is canceled and will complete with a status of -EINTR. 610 */ 611 void ib_sa_cancel_query(int id, struct ib_sa_query *query) 612 { 613 unsigned long flags; 614 struct ib_mad_agent *agent; 615 struct ib_mad_send_buf *mad_buf; 616 617 spin_lock_irqsave(&idr_lock, flags); 618 if (idr_find(&query_idr, id) != query) { 619 spin_unlock_irqrestore(&idr_lock, flags); 620 return; 621 } 622 agent = query->port->agent; 623 mad_buf = query->mad_buf; 624 spin_unlock_irqrestore(&idr_lock, flags); 625 } 626 EXPORT_SYMBOL(ib_sa_cancel_query); 627 628 static u8 get_src_path_mask(struct ib_device *device, u8 port_num) 629 { 630 struct ib_sa_device *sa_dev; 631 struct ib_sa_port *port; 632 unsigned long flags; 633 u8 src_path_mask; 634 635 sa_dev = ib_get_client_data(device, &sa_client); 636 if (!sa_dev) 637 return 0x7f; 638 639 port = &sa_dev->port[port_num - sa_dev->start_port]; 640 spin_lock_irqsave(&port->ah_lock, flags); 641 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f; 642 spin_unlock_irqrestore(&port->ah_lock, flags); 643 644 return src_path_mask; 645 } 646 647 int ib_init_ah_from_path(struct ib_device *device, u8 port_num, 648 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr) 649 { 650 int ret; 651 u16 gid_index; 652 int use_roce; 653 struct net_device *ndev = NULL; 654 655 memset(ah_attr, 0, sizeof *ah_attr); 656 ah_attr->dlid = be16_to_cpu(rec->dlid); 657 ah_attr->sl = rec->sl; 658 ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 659 get_src_path_mask(device, port_num); 660 ah_attr->port_num = port_num; 661 ah_attr->static_rate = rec->rate; 662 663 use_roce = rdma_cap_eth_ah(device, port_num); 664 665 if (use_roce) { 666 struct net_device *idev; 667 struct net_device *resolved_dev; 668 struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex, 669 .net = rec->net ? rec->net : 670 &init_net}; 671 union { 672 struct sockaddr _sockaddr; 673 struct sockaddr_in _sockaddr_in; 674 struct sockaddr_in6 _sockaddr_in6; 675 } sgid_addr, dgid_addr; 676 677 if (!device->get_netdev) 678 return -EOPNOTSUPP; 679 680 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid); 681 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid); 682 683 /* validate the route */ 684 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr, 685 &dgid_addr._sockaddr, &dev_addr); 686 if (ret) 687 return ret; 688 689 if ((dev_addr.network == RDMA_NETWORK_IPV4 || 690 dev_addr.network == RDMA_NETWORK_IPV6) && 691 rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP) 692 return -EINVAL; 693 694 idev = device->get_netdev(device, port_num); 695 if (!idev) 696 return -ENODEV; 697 698 resolved_dev = dev_get_by_index(dev_addr.net, 699 dev_addr.bound_dev_if); 700 if (!resolved_dev) { 701 dev_put(idev); 702 return -ENODEV; 703 } 704 ndev = ib_get_ndev_from_path(rec); 705 rcu_read_lock(); 706 if ((ndev && ndev != resolved_dev) || 707 (resolved_dev != idev && 708 !rdma_is_upper_dev_rcu(idev, resolved_dev))) 709 ret = -EHOSTUNREACH; 710 rcu_read_unlock(); 711 dev_put(idev); 712 dev_put(resolved_dev); 713 if (ret) { 714 if (ndev) 715 dev_put(ndev); 716 return ret; 717 } 718 } 719 720 if (rec->hop_limit > 0 || use_roce) { 721 ah_attr->ah_flags = IB_AH_GRH; 722 ah_attr->grh.dgid = rec->dgid; 723 724 ret = ib_find_cached_gid_by_port(device, &rec->sgid, 725 rec->gid_type, port_num, ndev, 726 &gid_index); 727 if (ret) { 728 if (ndev) 729 dev_put(ndev); 730 return ret; 731 } 732 733 ah_attr->grh.sgid_index = gid_index; 734 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label); 735 ah_attr->grh.hop_limit = rec->hop_limit; 736 ah_attr->grh.traffic_class = rec->traffic_class; 737 if (ndev) 738 dev_put(ndev); 739 } 740 741 if (use_roce) 742 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN); 743 744 return 0; 745 } 746 EXPORT_SYMBOL(ib_init_ah_from_path); 747 748 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask) 749 { 750 unsigned long flags; 751 752 spin_lock_irqsave(&query->port->ah_lock, flags); 753 if (!query->port->sm_ah) { 754 spin_unlock_irqrestore(&query->port->ah_lock, flags); 755 return -EAGAIN; 756 } 757 kref_get(&query->port->sm_ah->ref); 758 query->sm_ah = query->port->sm_ah; 759 spin_unlock_irqrestore(&query->port->ah_lock, flags); 760 761 query->mad_buf = ib_create_send_mad(query->port->agent, 1, 762 query->sm_ah->pkey_index, 763 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA, 764 gfp_mask, 765 IB_MGMT_BASE_VERSION); 766 if (IS_ERR(query->mad_buf)) { 767 kref_put(&query->sm_ah->ref, free_sm_ah); 768 return -ENOMEM; 769 } 770 771 query->mad_buf->ah = query->sm_ah->ah; 772 773 return 0; 774 } 775 776 static void free_mad(struct ib_sa_query *query) 777 { 778 ib_free_send_mad(query->mad_buf); 779 kref_put(&query->sm_ah->ref, free_sm_ah); 780 } 781 782 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent) 783 { 784 unsigned long flags; 785 786 memset(mad, 0, sizeof *mad); 787 788 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; 789 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; 790 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; 791 792 spin_lock_irqsave(&tid_lock, flags); 793 mad->mad_hdr.tid = 794 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); 795 spin_unlock_irqrestore(&tid_lock, flags); 796 } 797 798 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask) 799 { 800 bool preload = gfpflags_allow_blocking(gfp_mask); 801 unsigned long flags; 802 int ret, id; 803 804 if (preload) 805 idr_preload(gfp_mask); 806 spin_lock_irqsave(&idr_lock, flags); 807 808 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT); 809 810 spin_unlock_irqrestore(&idr_lock, flags); 811 if (preload) 812 idr_preload_end(); 813 if (id < 0) 814 return id; 815 816 query->mad_buf->timeout_ms = timeout_ms; 817 query->mad_buf->context[0] = query; 818 query->id = id; 819 820 if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) { 821 ib_sa_disable_local_svc(query); 822 } 823 824 ret = ib_post_send_mad(query->mad_buf, NULL); 825 if (ret) { 826 spin_lock_irqsave(&idr_lock, flags); 827 idr_remove(&query_idr, id); 828 spin_unlock_irqrestore(&idr_lock, flags); 829 } 830 831 /* 832 * It's not safe to dereference query any more, because the 833 * send may already have completed and freed the query in 834 * another context. 835 */ 836 return ret ? ret : id; 837 } 838 839 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec) 840 { 841 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec); 842 } 843 EXPORT_SYMBOL(ib_sa_unpack_path); 844 845 void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute) 846 { 847 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute); 848 } 849 EXPORT_SYMBOL(ib_sa_pack_path); 850 851 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, 852 int status, 853 struct ib_sa_mad *mad) 854 { 855 struct ib_sa_path_query *query = 856 container_of(sa_query, struct ib_sa_path_query, sa_query); 857 858 if (mad) { 859 struct ib_sa_path_rec rec; 860 861 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), 862 mad->data, &rec); 863 rec.net = NULL; 864 rec.ifindex = 0; 865 rec.gid_type = IB_GID_TYPE_IB; 866 eth_zero_addr(rec.dmac); 867 query->callback(status, &rec, query->context); 868 } else 869 query->callback(status, NULL, query->context); 870 } 871 872 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) 873 { 874 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query)); 875 } 876 877 /** 878 * ib_sa_path_rec_get - Start a Path get query 879 * @client:SA client 880 * @device:device to send query on 881 * @port_num: port number to send query on 882 * @rec:Path Record to send in query 883 * @comp_mask:component mask to send in query 884 * @timeout_ms:time to wait for response 885 * @gfp_mask:GFP mask to use for internal allocations 886 * @callback:function called when query completes, times out or is 887 * canceled 888 * @context:opaque user context passed to callback 889 * @sa_query:query context, used to cancel query 890 * 891 * Send a Path Record Get query to the SA to look up a path. The 892 * callback function will be called when the query completes (or 893 * fails); status is 0 for a successful response, -EINTR if the query 894 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 895 * occurred sending the query. The resp parameter of the callback is 896 * only valid if status is 0. 897 * 898 * If the return value of ib_sa_path_rec_get() is negative, it is an 899 * error code. Otherwise it is a query ID that can be used to cancel 900 * the query. 901 */ 902 int ib_sa_path_rec_get(struct ib_sa_client *client, 903 struct ib_device *device, u8 port_num, 904 struct ib_sa_path_rec *rec, 905 ib_sa_comp_mask comp_mask, 906 int timeout_ms, gfp_t gfp_mask, 907 void (*callback)(int status, 908 struct ib_sa_path_rec *resp, 909 void *context), 910 void *context, 911 struct ib_sa_query **sa_query) 912 { 913 struct ib_sa_path_query *query; 914 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 915 struct ib_sa_port *port; 916 struct ib_mad_agent *agent; 917 struct ib_sa_mad *mad; 918 int ret; 919 920 if (!sa_dev) 921 return -ENODEV; 922 923 port = &sa_dev->port[port_num - sa_dev->start_port]; 924 agent = port->agent; 925 926 query = kzalloc(sizeof(*query), gfp_mask); 927 if (!query) 928 return -ENOMEM; 929 930 query->sa_query.port = port; 931 ret = alloc_mad(&query->sa_query, gfp_mask); 932 if (ret) 933 goto err1; 934 935 ib_sa_client_get(client); 936 query->sa_query.client = client; 937 query->callback = callback; 938 query->context = context; 939 940 mad = query->sa_query.mad_buf->mad; 941 init_mad(mad, agent); 942 943 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; 944 query->sa_query.release = ib_sa_path_rec_release; 945 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 946 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); 947 mad->sa_hdr.comp_mask = comp_mask; 948 949 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data); 950 951 *sa_query = &query->sa_query; 952 953 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE; 954 query->sa_query.mad_buf->context[1] = rec; 955 956 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 957 if (ret < 0) 958 goto err2; 959 960 return ret; 961 962 err2: 963 *sa_query = NULL; 964 ib_sa_client_put(query->sa_query.client); 965 free_mad(&query->sa_query); 966 967 err1: 968 kfree(query); 969 return ret; 970 } 971 EXPORT_SYMBOL(ib_sa_path_rec_get); 972 973 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, 974 int status, 975 struct ib_sa_mad *mad) 976 { 977 struct ib_sa_service_query *query = 978 container_of(sa_query, struct ib_sa_service_query, sa_query); 979 980 if (mad) { 981 struct ib_sa_service_rec rec; 982 983 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), 984 mad->data, &rec); 985 query->callback(status, &rec, query->context); 986 } else 987 query->callback(status, NULL, query->context); 988 } 989 990 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) 991 { 992 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); 993 } 994 995 /** 996 * ib_sa_service_rec_query - Start Service Record operation 997 * @client:SA client 998 * @device:device to send request on 999 * @port_num: port number to send request on 1000 * @method:SA method - should be get, set, or delete 1001 * @rec:Service Record to send in request 1002 * @comp_mask:component mask to send in request 1003 * @timeout_ms:time to wait for response 1004 * @gfp_mask:GFP mask to use for internal allocations 1005 * @callback:function called when request completes, times out or is 1006 * canceled 1007 * @context:opaque user context passed to callback 1008 * @sa_query:request context, used to cancel request 1009 * 1010 * Send a Service Record set/get/delete to the SA to register, 1011 * unregister or query a service record. 1012 * The callback function will be called when the request completes (or 1013 * fails); status is 0 for a successful response, -EINTR if the query 1014 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 1015 * occurred sending the query. The resp parameter of the callback is 1016 * only valid if status is 0. 1017 * 1018 * If the return value of ib_sa_service_rec_query() is negative, it is an 1019 * error code. Otherwise it is a request ID that can be used to cancel 1020 * the query. 1021 */ 1022 int ib_sa_service_rec_query(struct ib_sa_client *client, 1023 struct ib_device *device, u8 port_num, u8 method, 1024 struct ib_sa_service_rec *rec, 1025 ib_sa_comp_mask comp_mask, 1026 int timeout_ms, gfp_t gfp_mask, 1027 void (*callback)(int status, 1028 struct ib_sa_service_rec *resp, 1029 void *context), 1030 void *context, 1031 struct ib_sa_query **sa_query) 1032 { 1033 struct ib_sa_service_query *query; 1034 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1035 struct ib_sa_port *port; 1036 struct ib_mad_agent *agent; 1037 struct ib_sa_mad *mad; 1038 int ret; 1039 1040 if (!sa_dev) 1041 return -ENODEV; 1042 1043 port = &sa_dev->port[port_num - sa_dev->start_port]; 1044 agent = port->agent; 1045 1046 if (method != IB_MGMT_METHOD_GET && 1047 method != IB_MGMT_METHOD_SET && 1048 method != IB_SA_METHOD_DELETE) 1049 return -EINVAL; 1050 1051 query = kzalloc(sizeof(*query), gfp_mask); 1052 if (!query) 1053 return -ENOMEM; 1054 1055 query->sa_query.port = port; 1056 ret = alloc_mad(&query->sa_query, gfp_mask); 1057 if (ret) 1058 goto err1; 1059 1060 ib_sa_client_get(client); 1061 query->sa_query.client = client; 1062 query->callback = callback; 1063 query->context = context; 1064 1065 mad = query->sa_query.mad_buf->mad; 1066 init_mad(mad, agent); 1067 1068 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; 1069 query->sa_query.release = ib_sa_service_rec_release; 1070 mad->mad_hdr.method = method; 1071 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC); 1072 mad->sa_hdr.comp_mask = comp_mask; 1073 1074 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), 1075 rec, mad->data); 1076 1077 *sa_query = &query->sa_query; 1078 1079 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1080 if (ret < 0) 1081 goto err2; 1082 1083 return ret; 1084 1085 err2: 1086 *sa_query = NULL; 1087 ib_sa_client_put(query->sa_query.client); 1088 free_mad(&query->sa_query); 1089 1090 err1: 1091 kfree(query); 1092 return ret; 1093 } 1094 EXPORT_SYMBOL(ib_sa_service_rec_query); 1095 1096 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, 1097 int status, 1098 struct ib_sa_mad *mad) 1099 { 1100 struct ib_sa_mcmember_query *query = 1101 container_of(sa_query, struct ib_sa_mcmember_query, sa_query); 1102 1103 if (mad) { 1104 struct ib_sa_mcmember_rec rec; 1105 1106 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1107 mad->data, &rec); 1108 query->callback(status, &rec, query->context); 1109 } else 1110 query->callback(status, NULL, query->context); 1111 } 1112 1113 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) 1114 { 1115 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); 1116 } 1117 1118 int ib_sa_mcmember_rec_query(struct ib_sa_client *client, 1119 struct ib_device *device, u8 port_num, 1120 u8 method, 1121 struct ib_sa_mcmember_rec *rec, 1122 ib_sa_comp_mask comp_mask, 1123 int timeout_ms, gfp_t gfp_mask, 1124 void (*callback)(int status, 1125 struct ib_sa_mcmember_rec *resp, 1126 void *context), 1127 void *context, 1128 struct ib_sa_query **sa_query) 1129 { 1130 struct ib_sa_mcmember_query *query; 1131 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1132 struct ib_sa_port *port; 1133 struct ib_mad_agent *agent; 1134 struct ib_sa_mad *mad; 1135 int ret; 1136 1137 if (!sa_dev) 1138 return -ENODEV; 1139 1140 port = &sa_dev->port[port_num - sa_dev->start_port]; 1141 agent = port->agent; 1142 1143 query = kzalloc(sizeof(*query), gfp_mask); 1144 if (!query) 1145 return -ENOMEM; 1146 1147 query->sa_query.port = port; 1148 ret = alloc_mad(&query->sa_query, gfp_mask); 1149 if (ret) 1150 goto err1; 1151 1152 ib_sa_client_get(client); 1153 query->sa_query.client = client; 1154 query->callback = callback; 1155 query->context = context; 1156 1157 mad = query->sa_query.mad_buf->mad; 1158 init_mad(mad, agent); 1159 1160 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; 1161 query->sa_query.release = ib_sa_mcmember_rec_release; 1162 mad->mad_hdr.method = method; 1163 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); 1164 mad->sa_hdr.comp_mask = comp_mask; 1165 1166 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1167 rec, mad->data); 1168 1169 *sa_query = &query->sa_query; 1170 1171 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1172 if (ret < 0) 1173 goto err2; 1174 1175 return ret; 1176 1177 err2: 1178 *sa_query = NULL; 1179 ib_sa_client_put(query->sa_query.client); 1180 free_mad(&query->sa_query); 1181 1182 err1: 1183 kfree(query); 1184 return ret; 1185 } 1186 1187 /* Support GuidInfoRecord */ 1188 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query, 1189 int status, 1190 struct ib_sa_mad *mad) 1191 { 1192 struct ib_sa_guidinfo_query *query = 1193 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query); 1194 1195 if (mad) { 1196 struct ib_sa_guidinfo_rec rec; 1197 1198 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), 1199 mad->data, &rec); 1200 query->callback(status, &rec, query->context); 1201 } else 1202 query->callback(status, NULL, query->context); 1203 } 1204 1205 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query) 1206 { 1207 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query)); 1208 } 1209 1210 int ib_sa_guid_info_rec_query(struct ib_sa_client *client, 1211 struct ib_device *device, u8 port_num, 1212 struct ib_sa_guidinfo_rec *rec, 1213 ib_sa_comp_mask comp_mask, u8 method, 1214 int timeout_ms, gfp_t gfp_mask, 1215 void (*callback)(int status, 1216 struct ib_sa_guidinfo_rec *resp, 1217 void *context), 1218 void *context, 1219 struct ib_sa_query **sa_query) 1220 { 1221 struct ib_sa_guidinfo_query *query; 1222 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1223 struct ib_sa_port *port; 1224 struct ib_mad_agent *agent; 1225 struct ib_sa_mad *mad; 1226 int ret; 1227 1228 if (!sa_dev) 1229 return -ENODEV; 1230 1231 if (method != IB_MGMT_METHOD_GET && 1232 method != IB_MGMT_METHOD_SET && 1233 method != IB_SA_METHOD_DELETE) { 1234 return -EINVAL; 1235 } 1236 1237 port = &sa_dev->port[port_num - sa_dev->start_port]; 1238 agent = port->agent; 1239 1240 query = kzalloc(sizeof(*query), gfp_mask); 1241 if (!query) 1242 return -ENOMEM; 1243 1244 query->sa_query.port = port; 1245 ret = alloc_mad(&query->sa_query, gfp_mask); 1246 if (ret) 1247 goto err1; 1248 1249 ib_sa_client_get(client); 1250 query->sa_query.client = client; 1251 query->callback = callback; 1252 query->context = context; 1253 1254 mad = query->sa_query.mad_buf->mad; 1255 init_mad(mad, agent); 1256 1257 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL; 1258 query->sa_query.release = ib_sa_guidinfo_rec_release; 1259 1260 mad->mad_hdr.method = method; 1261 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC); 1262 mad->sa_hdr.comp_mask = comp_mask; 1263 1264 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec, 1265 mad->data); 1266 1267 *sa_query = &query->sa_query; 1268 1269 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1270 if (ret < 0) 1271 goto err2; 1272 1273 return ret; 1274 1275 err2: 1276 *sa_query = NULL; 1277 ib_sa_client_put(query->sa_query.client); 1278 free_mad(&query->sa_query); 1279 1280 err1: 1281 kfree(query); 1282 return ret; 1283 } 1284 EXPORT_SYMBOL(ib_sa_guid_info_rec_query); 1285 1286 /* Support get SA ClassPortInfo */ 1287 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query, 1288 int status, 1289 struct ib_sa_mad *mad) 1290 { 1291 unsigned long flags; 1292 struct ib_sa_classport_info_query *query = 1293 container_of(sa_query, struct ib_sa_classport_info_query, sa_query); 1294 1295 if (mad) { 1296 struct ib_class_port_info rec; 1297 1298 ib_unpack(classport_info_rec_table, 1299 ARRAY_SIZE(classport_info_rec_table), 1300 mad->data, &rec); 1301 1302 spin_lock_irqsave(&sa_query->port->classport_lock, flags); 1303 if (!status && !sa_query->port->classport_info.valid) { 1304 memcpy(&sa_query->port->classport_info.data, &rec, 1305 sizeof(sa_query->port->classport_info.data)); 1306 1307 sa_query->port->classport_info.valid = true; 1308 } 1309 spin_unlock_irqrestore(&sa_query->port->classport_lock, flags); 1310 1311 query->callback(status, &rec, query->context); 1312 } else { 1313 query->callback(status, NULL, query->context); 1314 } 1315 } 1316 1317 static void ib_sa_portclass_info_rec_release(struct ib_sa_query *sa_query) 1318 { 1319 kfree(container_of(sa_query, struct ib_sa_classport_info_query, 1320 sa_query)); 1321 } 1322 1323 int ib_sa_classport_info_rec_query(struct ib_sa_client *client, 1324 struct ib_device *device, u8 port_num, 1325 int timeout_ms, gfp_t gfp_mask, 1326 void (*callback)(int status, 1327 struct ib_class_port_info *resp, 1328 void *context), 1329 void *context, 1330 struct ib_sa_query **sa_query) 1331 { 1332 struct ib_sa_classport_info_query *query; 1333 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1334 struct ib_sa_port *port; 1335 struct ib_mad_agent *agent; 1336 struct ib_sa_mad *mad; 1337 struct ib_class_port_info cached_class_port_info; 1338 int ret; 1339 unsigned long flags; 1340 1341 if (!sa_dev) 1342 return -ENODEV; 1343 1344 port = &sa_dev->port[port_num - sa_dev->start_port]; 1345 agent = port->agent; 1346 1347 /* Use cached ClassPortInfo attribute if valid instead of sending mad */ 1348 spin_lock_irqsave(&port->classport_lock, flags); 1349 if (port->classport_info.valid && callback) { 1350 memcpy(&cached_class_port_info, &port->classport_info.data, 1351 sizeof(cached_class_port_info)); 1352 spin_unlock_irqrestore(&port->classport_lock, flags); 1353 callback(0, &cached_class_port_info, context); 1354 return 0; 1355 } 1356 spin_unlock_irqrestore(&port->classport_lock, flags); 1357 1358 query = kzalloc(sizeof(*query), gfp_mask); 1359 if (!query) 1360 return -ENOMEM; 1361 1362 query->sa_query.port = port; 1363 ret = alloc_mad(&query->sa_query, gfp_mask); 1364 if (ret) 1365 goto err1; 1366 1367 ib_sa_client_get(client); 1368 query->sa_query.client = client; 1369 query->callback = callback; 1370 query->context = context; 1371 1372 mad = query->sa_query.mad_buf->mad; 1373 init_mad(mad, agent); 1374 1375 query->sa_query.callback = callback ? ib_sa_classport_info_rec_callback : NULL; 1376 1377 query->sa_query.release = ib_sa_portclass_info_rec_release; 1378 /* support GET only */ 1379 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 1380 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO); 1381 mad->sa_hdr.comp_mask = 0; 1382 *sa_query = &query->sa_query; 1383 1384 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1385 if (ret < 0) 1386 goto err2; 1387 1388 return ret; 1389 1390 err2: 1391 *sa_query = NULL; 1392 ib_sa_client_put(query->sa_query.client); 1393 free_mad(&query->sa_query); 1394 1395 err1: 1396 kfree(query); 1397 return ret; 1398 } 1399 EXPORT_SYMBOL(ib_sa_classport_info_rec_query); 1400 1401 static void send_handler(struct ib_mad_agent *agent, 1402 struct ib_mad_send_wc *mad_send_wc) 1403 { 1404 struct ib_sa_query *query = mad_send_wc->send_buf->context[0]; 1405 unsigned long flags; 1406 1407 if (query->callback) 1408 switch (mad_send_wc->status) { 1409 case IB_WC_SUCCESS: 1410 /* No callback -- already got recv */ 1411 break; 1412 case IB_WC_RESP_TIMEOUT_ERR: 1413 query->callback(query, -ETIMEDOUT, NULL); 1414 break; 1415 case IB_WC_WR_FLUSH_ERR: 1416 query->callback(query, -EINTR, NULL); 1417 break; 1418 default: 1419 query->callback(query, -EIO, NULL); 1420 break; 1421 } 1422 1423 spin_lock_irqsave(&idr_lock, flags); 1424 idr_remove(&query_idr, query->id); 1425 spin_unlock_irqrestore(&idr_lock, flags); 1426 1427 free_mad(query); 1428 ib_sa_client_put(query->client); 1429 query->release(query); 1430 } 1431 1432 static void recv_handler(struct ib_mad_agent *mad_agent, 1433 struct ib_mad_send_buf *send_buf, 1434 struct ib_mad_recv_wc *mad_recv_wc) 1435 { 1436 struct ib_sa_query *query; 1437 1438 if (!send_buf) 1439 return; 1440 1441 query = send_buf->context[0]; 1442 if (query->callback) { 1443 if (mad_recv_wc->wc->status == IB_WC_SUCCESS) 1444 query->callback(query, 1445 mad_recv_wc->recv_buf.mad->mad_hdr.status ? 1446 -EINVAL : 0, 1447 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); 1448 else 1449 query->callback(query, -EIO, NULL); 1450 } 1451 1452 ib_free_recv_mad(mad_recv_wc); 1453 } 1454 1455 static void ib_sa_add_one(struct ib_device *device) 1456 { 1457 struct ib_sa_device *sa_dev; 1458 int s, e, i; 1459 int count = 0; 1460 1461 s = rdma_start_port(device); 1462 e = rdma_end_port(device); 1463 1464 sa_dev = kzalloc(sizeof *sa_dev + 1465 (e - s + 1) * sizeof (struct ib_sa_port), 1466 GFP_KERNEL); 1467 if (!sa_dev) 1468 return; 1469 1470 sa_dev->start_port = s; 1471 sa_dev->end_port = e; 1472 1473 for (i = 0; i <= e - s; ++i) { 1474 spin_lock_init(&sa_dev->port[i].ah_lock); 1475 if (!rdma_cap_ib_sa(device, i + 1)) 1476 continue; 1477 1478 sa_dev->port[i].sm_ah = NULL; 1479 sa_dev->port[i].port_num = i + s; 1480 1481 spin_lock_init(&sa_dev->port[i].classport_lock); 1482 sa_dev->port[i].classport_info.valid = false; 1483 1484 sa_dev->port[i].agent = 1485 ib_register_mad_agent(device, i + s, IB_QPT_GSI, 1486 NULL, 0, send_handler, 1487 recv_handler, sa_dev, 0); 1488 if (IS_ERR(sa_dev->port[i].agent)) 1489 goto err; 1490 1491 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah); 1492 1493 count++; 1494 } 1495 1496 if (!count) 1497 goto free; 1498 1499 ib_set_client_data(device, &sa_client, sa_dev); 1500 1501 /* 1502 * We register our event handler after everything is set up, 1503 * and then update our cached info after the event handler is 1504 * registered to avoid any problems if a port changes state 1505 * during our initialization. 1506 */ 1507 1508 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); 1509 if (ib_register_event_handler(&sa_dev->event_handler)) 1510 goto err; 1511 1512 for (i = 0; i <= e - s; ++i) { 1513 if (rdma_cap_ib_sa(device, i + 1)) 1514 update_sm_ah(&sa_dev->port[i].update_task); 1515 } 1516 1517 return; 1518 1519 err: 1520 while (--i >= 0) { 1521 if (rdma_cap_ib_sa(device, i + 1)) 1522 ib_unregister_mad_agent(sa_dev->port[i].agent); 1523 } 1524 free: 1525 kfree(sa_dev); 1526 return; 1527 } 1528 1529 static void ib_sa_remove_one(struct ib_device *device, void *client_data) 1530 { 1531 struct ib_sa_device *sa_dev = client_data; 1532 int i; 1533 1534 if (!sa_dev) 1535 return; 1536 1537 ib_unregister_event_handler(&sa_dev->event_handler); 1538 1539 flush_workqueue(ib_wq); 1540 1541 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { 1542 if (rdma_cap_ib_sa(device, i + 1)) { 1543 ib_unregister_mad_agent(sa_dev->port[i].agent); 1544 if (sa_dev->port[i].sm_ah) 1545 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); 1546 } 1547 1548 } 1549 1550 kfree(sa_dev); 1551 } 1552 1553 int ib_sa_init(void) 1554 { 1555 int ret; 1556 1557 get_random_bytes(&tid, sizeof tid); 1558 1559 ret = ib_register_client(&sa_client); 1560 if (ret) { 1561 pr_err("Couldn't register ib_sa client\n"); 1562 goto err1; 1563 } 1564 1565 ret = mcast_init(); 1566 if (ret) { 1567 pr_err("Couldn't initialize multicast handling\n"); 1568 goto err2; 1569 } 1570 1571 return 0; 1572 1573 err2: 1574 ib_unregister_client(&sa_client); 1575 err1: 1576 return ret; 1577 } 1578 1579 void ib_sa_cleanup(void) 1580 { 1581 mcast_cleanup(); 1582 ib_unregister_client(&sa_client); 1583 idr_destroy(&query_idr); 1584 } 1585