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 62struct ib_sa_sm_ah { 63 struct ib_ah *ah; 64 struct kref ref; 65 u16 pkey_index; 66 u8 src_path_mask; 67}; 68 69struct ib_sa_classport_cache { 70 bool valid; 71 struct ib_class_port_info data; 72}; 73 74struct 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 84struct 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 90struct 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 108struct 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 114struct 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 120struct 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 126struct 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 132struct 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 138static void ib_sa_add_one(struct ib_device *device); 139static void ib_sa_remove_one(struct ib_device *device, void *client_data); 140 141static struct ib_client sa_client = { 142 .name = "sa", 143 .add = ib_sa_add_one, 144 .remove = ib_sa_remove_one 145}; 146 147static DEFINE_SPINLOCK(idr_lock); 148static DEFINE_IDR(query_idr); 149 150static DEFINE_SPINLOCK(tid_lock); 151static 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 158static 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 258static 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 342static 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 390static 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 466static 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 489static inline void ib_sa_disable_local_svc(struct ib_sa_query *query) 490{ 491 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE; 492} 493 494static 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 502static 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 553static 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 588void ib_sa_register_client(struct ib_sa_client *client) 589{ 590 atomic_set(&client->users, 1); 591 init_completion(&client->comp); 592} 593EXPORT_SYMBOL(ib_sa_register_client); 594 595void ib_sa_unregister_client(struct ib_sa_client *client) 596{ 597 ib_sa_client_put(client); 598 wait_for_completion(&client->comp); 599} 600EXPORT_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 */ 611void 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} 626EXPORT_SYMBOL(ib_sa_cancel_query); 627 628static 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 647int 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 if ((ndev && ndev != resolved_dev) || 706 (resolved_dev != idev && 707 rdma_vlan_dev_real_dev(resolved_dev) != idev)) 708 ret = -EHOSTUNREACH; 709 dev_put(idev); 710 dev_put(resolved_dev); 711 if (ret) { 712 if (ndev) 713 dev_put(ndev); 714 return ret; 715 } 716 } 717 718 if (rec->hop_limit > 0 || use_roce) { 719 ah_attr->ah_flags = IB_AH_GRH; 720 ah_attr->grh.dgid = rec->dgid; 721 722 ret = ib_find_cached_gid_by_port(device, &rec->sgid, 723 rec->gid_type, port_num, ndev, 724 &gid_index); 725 if (ret) { 726 if (ndev) 727 dev_put(ndev); 728 return ret; 729 } 730 731 ah_attr->grh.sgid_index = gid_index; 732 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label); 733 ah_attr->grh.hop_limit = rec->hop_limit; 734 ah_attr->grh.traffic_class = rec->traffic_class; 735 if (ndev) 736 dev_put(ndev); 737 } 738 739 if (use_roce) 740 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN); 741 742 return 0; 743} 744EXPORT_SYMBOL(ib_init_ah_from_path); 745 746static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask) 747{ 748 unsigned long flags; 749 750 spin_lock_irqsave(&query->port->ah_lock, flags); 751 if (!query->port->sm_ah) { 752 spin_unlock_irqrestore(&query->port->ah_lock, flags); 753 return -EAGAIN; 754 } 755 kref_get(&query->port->sm_ah->ref); 756 query->sm_ah = query->port->sm_ah; 757 spin_unlock_irqrestore(&query->port->ah_lock, flags); 758 759 query->mad_buf = ib_create_send_mad(query->port->agent, 1, 760 query->sm_ah->pkey_index, 761 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA, 762 gfp_mask, 763 IB_MGMT_BASE_VERSION); 764 if (IS_ERR(query->mad_buf)) { 765 kref_put(&query->sm_ah->ref, free_sm_ah); 766 return -ENOMEM; 767 } 768 769 query->mad_buf->ah = query->sm_ah->ah; 770 771 return 0; 772} 773 774static void free_mad(struct ib_sa_query *query) 775{ 776 ib_free_send_mad(query->mad_buf); 777 kref_put(&query->sm_ah->ref, free_sm_ah); 778} 779 780static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent) 781{ 782 unsigned long flags; 783 784 memset(mad, 0, sizeof *mad); 785 786 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; 787 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; 788 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; 789 790 spin_lock_irqsave(&tid_lock, flags); 791 mad->mad_hdr.tid = 792 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); 793 spin_unlock_irqrestore(&tid_lock, flags); 794} 795 796static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask) 797{ 798 bool preload = gfpflags_allow_blocking(gfp_mask); 799 unsigned long flags; 800 int ret, id; 801 802 if (preload) 803 idr_preload(gfp_mask); 804 spin_lock_irqsave(&idr_lock, flags); 805 806 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT); 807 808 spin_unlock_irqrestore(&idr_lock, flags); 809 if (preload) 810 idr_preload_end(); 811 if (id < 0) 812 return id; 813 814 query->mad_buf->timeout_ms = timeout_ms; 815 query->mad_buf->context[0] = query; 816 query->id = id; 817 818 if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) { 819 ib_sa_disable_local_svc(query); 820 } 821 822 ret = ib_post_send_mad(query->mad_buf, NULL); 823 if (ret) { 824 spin_lock_irqsave(&idr_lock, flags); 825 idr_remove(&query_idr, id); 826 spin_unlock_irqrestore(&idr_lock, flags); 827 } 828 829 /* 830 * It's not safe to dereference query any more, because the 831 * send may already have completed and freed the query in 832 * another context. 833 */ 834 return ret ? ret : id; 835} 836 837void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec) 838{ 839 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec); 840} 841EXPORT_SYMBOL(ib_sa_unpack_path); 842 843void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute) 844{ 845 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute); 846} 847EXPORT_SYMBOL(ib_sa_pack_path); 848 849static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, 850 int status, 851 struct ib_sa_mad *mad) 852{ 853 struct ib_sa_path_query *query = 854 container_of(sa_query, struct ib_sa_path_query, sa_query); 855 856 if (mad) { 857 struct ib_sa_path_rec rec; 858 859 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), 860 mad->data, &rec); 861 rec.net = NULL; 862 rec.ifindex = 0; 863 rec.gid_type = IB_GID_TYPE_IB; 864 eth_zero_addr(rec.dmac); 865 query->callback(status, &rec, query->context); 866 } else 867 query->callback(status, NULL, query->context); 868} 869 870static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) 871{ 872 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query)); 873} 874 875/** 876 * ib_sa_path_rec_get - Start a Path get query 877 * @client:SA client 878 * @device:device to send query on 879 * @port_num: port number to send query on 880 * @rec:Path Record to send in query 881 * @comp_mask:component mask to send in query 882 * @timeout_ms:time to wait for response 883 * @gfp_mask:GFP mask to use for internal allocations 884 * @callback:function called when query completes, times out or is 885 * canceled 886 * @context:opaque user context passed to callback 887 * @sa_query:query context, used to cancel query 888 * 889 * Send a Path Record Get query to the SA to look up a path. The 890 * callback function will be called when the query completes (or 891 * fails); status is 0 for a successful response, -EINTR if the query 892 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 893 * occurred sending the query. The resp parameter of the callback is 894 * only valid if status is 0. 895 * 896 * If the return value of ib_sa_path_rec_get() is negative, it is an 897 * error code. Otherwise it is a query ID that can be used to cancel 898 * the query. 899 */ 900int ib_sa_path_rec_get(struct ib_sa_client *client, 901 struct ib_device *device, u8 port_num, 902 struct ib_sa_path_rec *rec, 903 ib_sa_comp_mask comp_mask, 904 int timeout_ms, gfp_t gfp_mask, 905 void (*callback)(int status, 906 struct ib_sa_path_rec *resp, 907 void *context), 908 void *context, 909 struct ib_sa_query **sa_query) 910{ 911 struct ib_sa_path_query *query; 912 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 913 struct ib_sa_port *port; 914 struct ib_mad_agent *agent; 915 struct ib_sa_mad *mad; 916 int ret; 917 918 if (!sa_dev) 919 return -ENODEV; 920 921 port = &sa_dev->port[port_num - sa_dev->start_port]; 922 agent = port->agent; 923 924 query = kzalloc(sizeof(*query), gfp_mask); 925 if (!query) 926 return -ENOMEM; 927 928 query->sa_query.port = port; 929 ret = alloc_mad(&query->sa_query, gfp_mask); 930 if (ret) 931 goto err1; 932 933 ib_sa_client_get(client); 934 query->sa_query.client = client; 935 query->callback = callback; 936 query->context = context; 937 938 mad = query->sa_query.mad_buf->mad; 939 init_mad(mad, agent); 940 941 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; 942 query->sa_query.release = ib_sa_path_rec_release; 943 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 944 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); 945 mad->sa_hdr.comp_mask = comp_mask; 946 947 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data); 948 949 *sa_query = &query->sa_query; 950 951 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE; 952 query->sa_query.mad_buf->context[1] = rec; 953 954 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 955 if (ret < 0) 956 goto err2; 957 958 return ret; 959 960err2: 961 *sa_query = NULL; 962 ib_sa_client_put(query->sa_query.client); 963 free_mad(&query->sa_query); 964 965err1: 966 kfree(query); 967 return ret; 968} 969EXPORT_SYMBOL(ib_sa_path_rec_get); 970 971static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, 972 int status, 973 struct ib_sa_mad *mad) 974{ 975 struct ib_sa_service_query *query = 976 container_of(sa_query, struct ib_sa_service_query, sa_query); 977 978 if (mad) { 979 struct ib_sa_service_rec rec; 980 981 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), 982 mad->data, &rec); 983 query->callback(status, &rec, query->context); 984 } else 985 query->callback(status, NULL, query->context); 986} 987 988static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) 989{ 990 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); 991} 992 993/** 994 * ib_sa_service_rec_query - Start Service Record operation 995 * @client:SA client 996 * @device:device to send request on 997 * @port_num: port number to send request on 998 * @method:SA method - should be get, set, or delete 999 * @rec:Service Record to send in request 1000 * @comp_mask:component mask to send in request 1001 * @timeout_ms:time to wait for response 1002 * @gfp_mask:GFP mask to use for internal allocations 1003 * @callback:function called when request completes, times out or is 1004 * canceled 1005 * @context:opaque user context passed to callback 1006 * @sa_query:request context, used to cancel request 1007 * 1008 * Send a Service Record set/get/delete to the SA to register, 1009 * unregister or query a service record. 1010 * The callback function will be called when the request completes (or 1011 * fails); status is 0 for a successful response, -EINTR if the query 1012 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 1013 * occurred sending the query. The resp parameter of the callback is 1014 * only valid if status is 0. 1015 * 1016 * If the return value of ib_sa_service_rec_query() is negative, it is an 1017 * error code. Otherwise it is a request ID that can be used to cancel 1018 * the query. 1019 */ 1020int ib_sa_service_rec_query(struct ib_sa_client *client, 1021 struct ib_device *device, u8 port_num, u8 method, 1022 struct ib_sa_service_rec *rec, 1023 ib_sa_comp_mask comp_mask, 1024 int timeout_ms, gfp_t gfp_mask, 1025 void (*callback)(int status, 1026 struct ib_sa_service_rec *resp, 1027 void *context), 1028 void *context, 1029 struct ib_sa_query **sa_query) 1030{ 1031 struct ib_sa_service_query *query; 1032 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1033 struct ib_sa_port *port; 1034 struct ib_mad_agent *agent; 1035 struct ib_sa_mad *mad; 1036 int ret; 1037 1038 if (!sa_dev) 1039 return -ENODEV; 1040 1041 port = &sa_dev->port[port_num - sa_dev->start_port]; 1042 agent = port->agent; 1043 1044 if (method != IB_MGMT_METHOD_GET && 1045 method != IB_MGMT_METHOD_SET && 1046 method != IB_SA_METHOD_DELETE) 1047 return -EINVAL; 1048 1049 query = kzalloc(sizeof(*query), gfp_mask); 1050 if (!query) 1051 return -ENOMEM; 1052 1053 query->sa_query.port = port; 1054 ret = alloc_mad(&query->sa_query, gfp_mask); 1055 if (ret) 1056 goto err1; 1057 1058 ib_sa_client_get(client); 1059 query->sa_query.client = client; 1060 query->callback = callback; 1061 query->context = context; 1062 1063 mad = query->sa_query.mad_buf->mad; 1064 init_mad(mad, agent); 1065 1066 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; 1067 query->sa_query.release = ib_sa_service_rec_release; 1068 mad->mad_hdr.method = method; 1069 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC); 1070 mad->sa_hdr.comp_mask = comp_mask; 1071 1072 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), 1073 rec, mad->data); 1074 1075 *sa_query = &query->sa_query; 1076 1077 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1078 if (ret < 0) 1079 goto err2; 1080 1081 return ret; 1082 1083err2: 1084 *sa_query = NULL; 1085 ib_sa_client_put(query->sa_query.client); 1086 free_mad(&query->sa_query); 1087 1088err1: 1089 kfree(query); 1090 return ret; 1091} 1092EXPORT_SYMBOL(ib_sa_service_rec_query); 1093 1094static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, 1095 int status, 1096 struct ib_sa_mad *mad) 1097{ 1098 struct ib_sa_mcmember_query *query = 1099 container_of(sa_query, struct ib_sa_mcmember_query, sa_query); 1100 1101 if (mad) { 1102 struct ib_sa_mcmember_rec rec; 1103 1104 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1105 mad->data, &rec); 1106 query->callback(status, &rec, query->context); 1107 } else 1108 query->callback(status, NULL, query->context); 1109} 1110 1111static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) 1112{ 1113 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); 1114} 1115 1116int ib_sa_mcmember_rec_query(struct ib_sa_client *client, 1117 struct ib_device *device, u8 port_num, 1118 u8 method, 1119 struct ib_sa_mcmember_rec *rec, 1120 ib_sa_comp_mask comp_mask, 1121 int timeout_ms, gfp_t gfp_mask, 1122 void (*callback)(int status, 1123 struct ib_sa_mcmember_rec *resp, 1124 void *context), 1125 void *context, 1126 struct ib_sa_query **sa_query) 1127{ 1128 struct ib_sa_mcmember_query *query; 1129 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1130 struct ib_sa_port *port; 1131 struct ib_mad_agent *agent; 1132 struct ib_sa_mad *mad; 1133 int ret; 1134 1135 if (!sa_dev) 1136 return -ENODEV; 1137 1138 port = &sa_dev->port[port_num - sa_dev->start_port]; 1139 agent = port->agent; 1140 1141 query = kzalloc(sizeof(*query), gfp_mask); 1142 if (!query) 1143 return -ENOMEM; 1144 1145 query->sa_query.port = port; 1146 ret = alloc_mad(&query->sa_query, gfp_mask); 1147 if (ret) 1148 goto err1; 1149 1150 ib_sa_client_get(client); 1151 query->sa_query.client = client; 1152 query->callback = callback; 1153 query->context = context; 1154 1155 mad = query->sa_query.mad_buf->mad; 1156 init_mad(mad, agent); 1157 1158 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; 1159 query->sa_query.release = ib_sa_mcmember_rec_release; 1160 mad->mad_hdr.method = method; 1161 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); 1162 mad->sa_hdr.comp_mask = comp_mask; 1163 1164 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1165 rec, mad->data); 1166 1167 *sa_query = &query->sa_query; 1168 1169 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1170 if (ret < 0) 1171 goto err2; 1172 1173 return ret; 1174 1175err2: 1176 *sa_query = NULL; 1177 ib_sa_client_put(query->sa_query.client); 1178 free_mad(&query->sa_query); 1179 1180err1: 1181 kfree(query); 1182 return ret; 1183} 1184 1185/* Support GuidInfoRecord */ 1186static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query, 1187 int status, 1188 struct ib_sa_mad *mad) 1189{ 1190 struct ib_sa_guidinfo_query *query = 1191 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query); 1192 1193 if (mad) { 1194 struct ib_sa_guidinfo_rec rec; 1195 1196 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), 1197 mad->data, &rec); 1198 query->callback(status, &rec, query->context); 1199 } else 1200 query->callback(status, NULL, query->context); 1201} 1202 1203static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query) 1204{ 1205 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query)); 1206} 1207 1208int ib_sa_guid_info_rec_query(struct ib_sa_client *client, 1209 struct ib_device *device, u8 port_num, 1210 struct ib_sa_guidinfo_rec *rec, 1211 ib_sa_comp_mask comp_mask, u8 method, 1212 int timeout_ms, gfp_t gfp_mask, 1213 void (*callback)(int status, 1214 struct ib_sa_guidinfo_rec *resp, 1215 void *context), 1216 void *context, 1217 struct ib_sa_query **sa_query) 1218{ 1219 struct ib_sa_guidinfo_query *query; 1220 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1221 struct ib_sa_port *port; 1222 struct ib_mad_agent *agent; 1223 struct ib_sa_mad *mad; 1224 int ret; 1225 1226 if (!sa_dev) 1227 return -ENODEV; 1228 1229 if (method != IB_MGMT_METHOD_GET && 1230 method != IB_MGMT_METHOD_SET && 1231 method != IB_SA_METHOD_DELETE) { 1232 return -EINVAL; 1233 } 1234 1235 port = &sa_dev->port[port_num - sa_dev->start_port]; 1236 agent = port->agent; 1237 1238 query = kzalloc(sizeof(*query), gfp_mask); 1239 if (!query) 1240 return -ENOMEM; 1241 1242 query->sa_query.port = port; 1243 ret = alloc_mad(&query->sa_query, gfp_mask); 1244 if (ret) 1245 goto err1; 1246 1247 ib_sa_client_get(client); 1248 query->sa_query.client = client; 1249 query->callback = callback; 1250 query->context = context; 1251 1252 mad = query->sa_query.mad_buf->mad; 1253 init_mad(mad, agent); 1254 1255 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL; 1256 query->sa_query.release = ib_sa_guidinfo_rec_release; 1257 1258 mad->mad_hdr.method = method; 1259 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC); 1260 mad->sa_hdr.comp_mask = comp_mask; 1261 1262 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec, 1263 mad->data); 1264 1265 *sa_query = &query->sa_query; 1266 1267 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1268 if (ret < 0) 1269 goto err2; 1270 1271 return ret; 1272 1273err2: 1274 *sa_query = NULL; 1275 ib_sa_client_put(query->sa_query.client); 1276 free_mad(&query->sa_query); 1277 1278err1: 1279 kfree(query); 1280 return ret; 1281} 1282EXPORT_SYMBOL(ib_sa_guid_info_rec_query); 1283 1284/* Support get SA ClassPortInfo */ 1285static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query, 1286 int status, 1287 struct ib_sa_mad *mad) 1288{ 1289 unsigned long flags; 1290 struct ib_sa_classport_info_query *query = 1291 container_of(sa_query, struct ib_sa_classport_info_query, sa_query); 1292 1293 if (mad) { 1294 struct ib_class_port_info rec; 1295 1296 ib_unpack(classport_info_rec_table, 1297 ARRAY_SIZE(classport_info_rec_table), 1298 mad->data, &rec); 1299 1300 spin_lock_irqsave(&sa_query->port->classport_lock, flags); 1301 if (!status && !sa_query->port->classport_info.valid) { 1302 memcpy(&sa_query->port->classport_info.data, &rec, 1303 sizeof(sa_query->port->classport_info.data)); 1304 1305 sa_query->port->classport_info.valid = true; 1306 } 1307 spin_unlock_irqrestore(&sa_query->port->classport_lock, flags); 1308 1309 query->callback(status, &rec, query->context); 1310 } else { 1311 query->callback(status, NULL, query->context); 1312 } 1313} 1314 1315static void ib_sa_portclass_info_rec_release(struct ib_sa_query *sa_query) 1316{ 1317 kfree(container_of(sa_query, struct ib_sa_classport_info_query, 1318 sa_query)); 1319} 1320 1321int ib_sa_classport_info_rec_query(struct ib_sa_client *client, 1322 struct ib_device *device, u8 port_num, 1323 int timeout_ms, gfp_t gfp_mask, 1324 void (*callback)(int status, 1325 struct ib_class_port_info *resp, 1326 void *context), 1327 void *context, 1328 struct ib_sa_query **sa_query) 1329{ 1330 struct ib_sa_classport_info_query *query; 1331 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1332 struct ib_sa_port *port; 1333 struct ib_mad_agent *agent; 1334 struct ib_sa_mad *mad; 1335 struct ib_class_port_info cached_class_port_info; 1336 int ret; 1337 unsigned long flags; 1338 1339 if (!sa_dev) 1340 return -ENODEV; 1341 1342 port = &sa_dev->port[port_num - sa_dev->start_port]; 1343 agent = port->agent; 1344 1345 /* Use cached ClassPortInfo attribute if valid instead of sending mad */ 1346 spin_lock_irqsave(&port->classport_lock, flags); 1347 if (port->classport_info.valid && callback) { 1348 memcpy(&cached_class_port_info, &port->classport_info.data, 1349 sizeof(cached_class_port_info)); 1350 spin_unlock_irqrestore(&port->classport_lock, flags); 1351 callback(0, &cached_class_port_info, context); 1352 return 0; 1353 } 1354 spin_unlock_irqrestore(&port->classport_lock, flags); 1355 1356 query = kzalloc(sizeof(*query), gfp_mask); 1357 if (!query) 1358 return -ENOMEM; 1359 1360 query->sa_query.port = port; 1361 ret = alloc_mad(&query->sa_query, gfp_mask); 1362 if (ret) 1363 goto err1; 1364 1365 ib_sa_client_get(client); 1366 query->sa_query.client = client; 1367 query->callback = callback; 1368 query->context = context; 1369 1370 mad = query->sa_query.mad_buf->mad; 1371 init_mad(mad, agent); 1372 1373 query->sa_query.callback = callback ? ib_sa_classport_info_rec_callback : NULL; 1374 1375 query->sa_query.release = ib_sa_portclass_info_rec_release; 1376 /* support GET only */ 1377 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 1378 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO); 1379 mad->sa_hdr.comp_mask = 0; 1380 *sa_query = &query->sa_query; 1381 1382 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1383 if (ret < 0) 1384 goto err2; 1385 1386 return ret; 1387 1388err2: 1389 *sa_query = NULL; 1390 ib_sa_client_put(query->sa_query.client); 1391 free_mad(&query->sa_query); 1392 1393err1: 1394 kfree(query); 1395 return ret; 1396} 1397EXPORT_SYMBOL(ib_sa_classport_info_rec_query); 1398 1399static void send_handler(struct ib_mad_agent *agent, 1400 struct ib_mad_send_wc *mad_send_wc) 1401{ 1402 struct ib_sa_query *query = mad_send_wc->send_buf->context[0]; 1403 unsigned long flags; 1404 1405 if (query->callback) 1406 switch (mad_send_wc->status) { 1407 case IB_WC_SUCCESS: 1408 /* No callback -- already got recv */ 1409 break; 1410 case IB_WC_RESP_TIMEOUT_ERR: 1411 query->callback(query, -ETIMEDOUT, NULL); 1412 break; 1413 case IB_WC_WR_FLUSH_ERR: 1414 query->callback(query, -EINTR, NULL); 1415 break; 1416 default: 1417 query->callback(query, -EIO, NULL); 1418 break; 1419 } 1420 1421 spin_lock_irqsave(&idr_lock, flags); 1422 idr_remove(&query_idr, query->id); 1423 spin_unlock_irqrestore(&idr_lock, flags); 1424 1425 free_mad(query); 1426 ib_sa_client_put(query->client); 1427 query->release(query); 1428} 1429 1430static void recv_handler(struct ib_mad_agent *mad_agent, 1431 struct ib_mad_send_buf *send_buf, 1432 struct ib_mad_recv_wc *mad_recv_wc) 1433{ 1434 struct ib_sa_query *query; 1435 1436 if (!send_buf) 1437 return; 1438 1439 query = send_buf->context[0]; 1440 if (query->callback) { 1441 if (mad_recv_wc->wc->status == IB_WC_SUCCESS) 1442 query->callback(query, 1443 mad_recv_wc->recv_buf.mad->mad_hdr.status ? 1444 -EINVAL : 0, 1445 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); 1446 else 1447 query->callback(query, -EIO, NULL); 1448 } 1449 1450 ib_free_recv_mad(mad_recv_wc); 1451} 1452 1453static void ib_sa_add_one(struct ib_device *device) 1454{ 1455 struct ib_sa_device *sa_dev; 1456 int s, e, i; 1457 int count = 0; 1458 1459 s = rdma_start_port(device); 1460 e = rdma_end_port(device); 1461 1462 sa_dev = kzalloc(sizeof *sa_dev + 1463 (e - s + 1) * sizeof (struct ib_sa_port), 1464 GFP_KERNEL); 1465 if (!sa_dev) 1466 return; 1467 1468 sa_dev->start_port = s; 1469 sa_dev->end_port = e; 1470 1471 for (i = 0; i <= e - s; ++i) { 1472 spin_lock_init(&sa_dev->port[i].ah_lock); 1473 if (!rdma_cap_ib_sa(device, i + 1)) 1474 continue; 1475 1476 sa_dev->port[i].sm_ah = NULL; 1477 sa_dev->port[i].port_num = i + s; 1478 1479 spin_lock_init(&sa_dev->port[i].classport_lock); 1480 sa_dev->port[i].classport_info.valid = false; 1481 1482 sa_dev->port[i].agent = 1483 ib_register_mad_agent(device, i + s, IB_QPT_GSI, 1484 NULL, 0, send_handler, 1485 recv_handler, sa_dev, 0); 1486 if (IS_ERR(sa_dev->port[i].agent)) 1487 goto err; 1488 1489 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah); 1490 1491 count++; 1492 } 1493 1494 if (!count) 1495 goto free; 1496 1497 ib_set_client_data(device, &sa_client, sa_dev); 1498 1499 /* 1500 * We register our event handler after everything is set up, 1501 * and then update our cached info after the event handler is 1502 * registered to avoid any problems if a port changes state 1503 * during our initialization. 1504 */ 1505 1506 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); 1507 if (ib_register_event_handler(&sa_dev->event_handler)) 1508 goto err; 1509 1510 for (i = 0; i <= e - s; ++i) { 1511 if (rdma_cap_ib_sa(device, i + 1)) 1512 update_sm_ah(&sa_dev->port[i].update_task); 1513 } 1514 1515 return; 1516 1517err: 1518 while (--i >= 0) { 1519 if (rdma_cap_ib_sa(device, i + 1)) 1520 ib_unregister_mad_agent(sa_dev->port[i].agent); 1521 } 1522free: 1523 kfree(sa_dev); 1524 return; 1525} 1526 1527static void ib_sa_remove_one(struct ib_device *device, void *client_data) 1528{ 1529 struct ib_sa_device *sa_dev = client_data; 1530 int i; 1531 1532 if (!sa_dev) 1533 return; 1534 1535 ib_unregister_event_handler(&sa_dev->event_handler); 1536 1537 flush_workqueue(ib_wq); 1538 1539 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { 1540 if (rdma_cap_ib_sa(device, i + 1)) { 1541 ib_unregister_mad_agent(sa_dev->port[i].agent); 1542 if (sa_dev->port[i].sm_ah) 1543 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); 1544 } 1545 1546 } 1547 1548 kfree(sa_dev); 1549} 1550 1551int ib_sa_init(void) 1552{ 1553 int ret; 1554 1555 get_random_bytes(&tid, sizeof tid); 1556 1557 ret = ib_register_client(&sa_client); 1558 if (ret) { 1559 pr_err("Couldn't register ib_sa client\n"); 1560 goto err1; 1561 } 1562 1563 ret = mcast_init(); 1564 if (ret) { 1565 pr_err("Couldn't initialize multicast handling\n"); 1566 goto err2; 1567 } 1568 1569 return 0; 1570 1571err2: 1572 ib_unregister_client(&sa_client); 1573err1: 1574 return ret; 1575} 1576 1577void ib_sa_cleanup(void) 1578{ 1579 mcast_cleanup(); 1580 ib_unregister_client(&sa_client); 1581 idr_destroy(&query_idr); 1582} 1583