Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/ofed/drivers/infiniband/core/ib_sa_query.c
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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, 0); 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, RDMA_CREATE_AH_SLEEPABLE); 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 ib_cancel_mad(agent, mad_buf); 627 } 628 EXPORT_SYMBOL(ib_sa_cancel_query); 629 630 static u8 get_src_path_mask(struct ib_device *device, u8 port_num) 631 { 632 struct ib_sa_device *sa_dev; 633 struct ib_sa_port *port; 634 unsigned long flags; 635 u8 src_path_mask; 636 637 sa_dev = ib_get_client_data(device, &sa_client); 638 if (!sa_dev) 639 return 0x7f; 640 641 port = &sa_dev->port[port_num - sa_dev->start_port]; 642 spin_lock_irqsave(&port->ah_lock, flags); 643 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f; 644 spin_unlock_irqrestore(&port->ah_lock, flags); 645 646 return src_path_mask; 647 } 648 649 int ib_init_ah_from_path(struct ib_device *device, u8 port_num, 650 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr) 651 { 652 int ret; 653 u16 gid_index; 654 int use_roce; 655 struct ifnet *ndev = NULL; 656 657 memset(ah_attr, 0, sizeof *ah_attr); 658 ah_attr->dlid = be16_to_cpu(rec->dlid); 659 ah_attr->sl = rec->sl; 660 ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 661 get_src_path_mask(device, port_num); 662 ah_attr->port_num = port_num; 663 ah_attr->static_rate = rec->rate; 664 665 use_roce = rdma_cap_eth_ah(device, port_num); 666 667 if (use_roce) { 668 struct ifnet *idev; 669 struct ifnet *resolved_dev; 670 struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex, 671 .net = rec->net ? rec->net : 672 &init_net}; 673 union rdma_sockaddr sgid_addr, dgid_addr; 674 675 if (!device->get_netdev) 676 return -EOPNOTSUPP; 677 678 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid); 679 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid); 680 681 /* validate the route */ 682 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr, 683 &dgid_addr._sockaddr, &dev_addr); 684 if (ret) 685 return ret; 686 687 if ((dev_addr.network == RDMA_NETWORK_IPV4 || 688 dev_addr.network == RDMA_NETWORK_IPV6) && 689 rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP) 690 return -EINVAL; 691 692 idev = device->get_netdev(device, port_num); 693 if (!idev) 694 return -ENODEV; 695 696 resolved_dev = dev_get_by_index(dev_addr.net, 697 dev_addr.bound_dev_if); 698 if (!resolved_dev) { 699 dev_put(idev); 700 return -ENODEV; 701 } 702 ndev = ib_get_ndev_from_path(rec); 703 if ((ndev && ndev != resolved_dev) || 704 (resolved_dev != idev && 705 rdma_vlan_dev_real_dev(resolved_dev) != idev)) 706 ret = -EHOSTUNREACH; 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 }
Cache object: 255ad7bae5062d9e9ee6afaa5de24c06
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