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