1 /* 2 * Copyright (c) 2004 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 4 * Copyright (c) 2006 Intel Corporation. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include <linux/module.h> 36 #include <linux/init.h> 37 #include <linux/err.h> 38 #include <linux/random.h> 39 #include <linux/spinlock.h> 40 #include <linux/slab.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kref.h> 43 #include <linux/xarray.h> 44 #include <linux/workqueue.h> 45 #include <uapi/linux/if_ether.h> 46 #include <rdma/ib_pack.h> 47 #include <rdma/ib_cache.h> 48 #include <rdma/rdma_netlink.h> 49 #include <net/netlink.h> 50 #include <uapi/rdma/ib_user_sa.h> 51 #include <rdma/ib_marshall.h> 52 #include <rdma/ib_addr.h> 53 #include <rdma/opa_addr.h> 54 #include "sa.h" 55 #include "core_priv.h" 56 57 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100 58 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000 59 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000 60 #define IB_SA_CPI_MAX_RETRY_CNT 3 61 #define IB_SA_CPI_RETRY_WAIT 1000 /*msecs */ 62 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT; 63 64 struct ib_sa_sm_ah { 65 struct ib_ah *ah; 66 struct kref ref; 67 u16 pkey_index; 68 u8 src_path_mask; 69 }; 70 71 enum rdma_class_port_info_type { 72 RDMA_CLASS_PORT_INFO_IB, 73 RDMA_CLASS_PORT_INFO_OPA 74 }; 75 76 struct rdma_class_port_info { 77 enum rdma_class_port_info_type type; 78 union { 79 struct ib_class_port_info ib; 80 struct opa_class_port_info opa; 81 }; 82 }; 83 84 struct ib_sa_classport_cache { 85 bool valid; 86 int retry_cnt; 87 struct rdma_class_port_info data; 88 }; 89 90 struct ib_sa_port { 91 struct ib_mad_agent *agent; 92 struct ib_sa_sm_ah *sm_ah; 93 struct work_struct update_task; 94 struct ib_sa_classport_cache classport_info; 95 struct delayed_work ib_cpi_work; 96 spinlock_t classport_lock; /* protects class port info set */ 97 spinlock_t ah_lock; 98 u8 port_num; 99 }; 100 101 struct ib_sa_device { 102 int start_port, end_port; 103 struct ib_event_handler event_handler; 104 struct ib_sa_port port[]; 105 }; 106 107 struct ib_sa_query { 108 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *); 109 void (*release)(struct ib_sa_query *); 110 struct ib_sa_client *client; 111 struct ib_sa_port *port; 112 struct ib_mad_send_buf *mad_buf; 113 struct ib_sa_sm_ah *sm_ah; 114 int id; 115 u32 flags; 116 struct list_head list; /* Local svc request list */ 117 u32 seq; /* Local svc request sequence number */ 118 unsigned long timeout; /* Local svc timeout */ 119 u8 path_use; /* How will the pathrecord be used */ 120 }; 121 122 #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001 123 #define IB_SA_CANCEL 0x00000002 124 #define IB_SA_QUERY_OPA 0x00000004 125 126 struct ib_sa_service_query { 127 void (*callback)(int, struct ib_sa_service_rec *, void *); 128 void *context; 129 struct ib_sa_query sa_query; 130 }; 131 132 struct ib_sa_path_query { 133 void (*callback)(int, struct sa_path_rec *, void *); 134 void *context; 135 struct ib_sa_query sa_query; 136 struct sa_path_rec *conv_pr; 137 }; 138 139 struct ib_sa_guidinfo_query { 140 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *); 141 void *context; 142 struct ib_sa_query sa_query; 143 }; 144 145 struct ib_sa_classport_info_query { 146 void (*callback)(void *); 147 void *context; 148 struct ib_sa_query sa_query; 149 }; 150 151 struct ib_sa_mcmember_query { 152 void (*callback)(int, struct ib_sa_mcmember_rec *, void *); 153 void *context; 154 struct ib_sa_query sa_query; 155 }; 156 157 static LIST_HEAD(ib_nl_request_list); 158 static DEFINE_SPINLOCK(ib_nl_request_lock); 159 static atomic_t ib_nl_sa_request_seq; 160 static struct workqueue_struct *ib_nl_wq; 161 static struct delayed_work ib_nl_timed_work; 162 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = { 163 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY, 164 .len = sizeof(struct ib_path_rec_data)}, 165 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32}, 166 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64}, 167 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY, 168 .len = sizeof(struct rdma_nla_ls_gid)}, 169 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY, 170 .len = sizeof(struct rdma_nla_ls_gid)}, 171 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8}, 172 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16}, 173 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16}, 174 }; 175 176 177 static int ib_sa_add_one(struct ib_device *device); 178 static void ib_sa_remove_one(struct ib_device *device, void *client_data); 179 180 static struct ib_client sa_client = { 181 .name = "sa", 182 .add = ib_sa_add_one, 183 .remove = ib_sa_remove_one 184 }; 185 186 static DEFINE_XARRAY_FLAGS(queries, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); 187 188 static DEFINE_SPINLOCK(tid_lock); 189 static u32 tid; 190 191 #define PATH_REC_FIELD(field) \ 192 .struct_offset_bytes = offsetof(struct sa_path_rec, field), \ 193 .struct_size_bytes = sizeof_field(struct sa_path_rec, field), \ 194 .field_name = "sa_path_rec:" #field 195 196 static const struct ib_field path_rec_table[] = { 197 { PATH_REC_FIELD(service_id), 198 .offset_words = 0, 199 .offset_bits = 0, 200 .size_bits = 64 }, 201 { PATH_REC_FIELD(dgid), 202 .offset_words = 2, 203 .offset_bits = 0, 204 .size_bits = 128 }, 205 { PATH_REC_FIELD(sgid), 206 .offset_words = 6, 207 .offset_bits = 0, 208 .size_bits = 128 }, 209 { PATH_REC_FIELD(ib.dlid), 210 .offset_words = 10, 211 .offset_bits = 0, 212 .size_bits = 16 }, 213 { PATH_REC_FIELD(ib.slid), 214 .offset_words = 10, 215 .offset_bits = 16, 216 .size_bits = 16 }, 217 { PATH_REC_FIELD(ib.raw_traffic), 218 .offset_words = 11, 219 .offset_bits = 0, 220 .size_bits = 1 }, 221 { RESERVED, 222 .offset_words = 11, 223 .offset_bits = 1, 224 .size_bits = 3 }, 225 { PATH_REC_FIELD(flow_label), 226 .offset_words = 11, 227 .offset_bits = 4, 228 .size_bits = 20 }, 229 { PATH_REC_FIELD(hop_limit), 230 .offset_words = 11, 231 .offset_bits = 24, 232 .size_bits = 8 }, 233 { PATH_REC_FIELD(traffic_class), 234 .offset_words = 12, 235 .offset_bits = 0, 236 .size_bits = 8 }, 237 { PATH_REC_FIELD(reversible), 238 .offset_words = 12, 239 .offset_bits = 8, 240 .size_bits = 1 }, 241 { PATH_REC_FIELD(numb_path), 242 .offset_words = 12, 243 .offset_bits = 9, 244 .size_bits = 7 }, 245 { PATH_REC_FIELD(pkey), 246 .offset_words = 12, 247 .offset_bits = 16, 248 .size_bits = 16 }, 249 { PATH_REC_FIELD(qos_class), 250 .offset_words = 13, 251 .offset_bits = 0, 252 .size_bits = 12 }, 253 { PATH_REC_FIELD(sl), 254 .offset_words = 13, 255 .offset_bits = 12, 256 .size_bits = 4 }, 257 { PATH_REC_FIELD(mtu_selector), 258 .offset_words = 13, 259 .offset_bits = 16, 260 .size_bits = 2 }, 261 { PATH_REC_FIELD(mtu), 262 .offset_words = 13, 263 .offset_bits = 18, 264 .size_bits = 6 }, 265 { PATH_REC_FIELD(rate_selector), 266 .offset_words = 13, 267 .offset_bits = 24, 268 .size_bits = 2 }, 269 { PATH_REC_FIELD(rate), 270 .offset_words = 13, 271 .offset_bits = 26, 272 .size_bits = 6 }, 273 { PATH_REC_FIELD(packet_life_time_selector), 274 .offset_words = 14, 275 .offset_bits = 0, 276 .size_bits = 2 }, 277 { PATH_REC_FIELD(packet_life_time), 278 .offset_words = 14, 279 .offset_bits = 2, 280 .size_bits = 6 }, 281 { PATH_REC_FIELD(preference), 282 .offset_words = 14, 283 .offset_bits = 8, 284 .size_bits = 8 }, 285 { RESERVED, 286 .offset_words = 14, 287 .offset_bits = 16, 288 .size_bits = 48 }, 289 }; 290 291 #define OPA_PATH_REC_FIELD(field) \ 292 .struct_offset_bytes = \ 293 offsetof(struct sa_path_rec, field), \ 294 .struct_size_bytes = \ 295 sizeof_field(struct sa_path_rec, field), \ 296 .field_name = "sa_path_rec:" #field 297 298 static const struct ib_field opa_path_rec_table[] = { 299 { OPA_PATH_REC_FIELD(service_id), 300 .offset_words = 0, 301 .offset_bits = 0, 302 .size_bits = 64 }, 303 { OPA_PATH_REC_FIELD(dgid), 304 .offset_words = 2, 305 .offset_bits = 0, 306 .size_bits = 128 }, 307 { OPA_PATH_REC_FIELD(sgid), 308 .offset_words = 6, 309 .offset_bits = 0, 310 .size_bits = 128 }, 311 { OPA_PATH_REC_FIELD(opa.dlid), 312 .offset_words = 10, 313 .offset_bits = 0, 314 .size_bits = 32 }, 315 { OPA_PATH_REC_FIELD(opa.slid), 316 .offset_words = 11, 317 .offset_bits = 0, 318 .size_bits = 32 }, 319 { OPA_PATH_REC_FIELD(opa.raw_traffic), 320 .offset_words = 12, 321 .offset_bits = 0, 322 .size_bits = 1 }, 323 { RESERVED, 324 .offset_words = 12, 325 .offset_bits = 1, 326 .size_bits = 3 }, 327 { OPA_PATH_REC_FIELD(flow_label), 328 .offset_words = 12, 329 .offset_bits = 4, 330 .size_bits = 20 }, 331 { OPA_PATH_REC_FIELD(hop_limit), 332 .offset_words = 12, 333 .offset_bits = 24, 334 .size_bits = 8 }, 335 { OPA_PATH_REC_FIELD(traffic_class), 336 .offset_words = 13, 337 .offset_bits = 0, 338 .size_bits = 8 }, 339 { OPA_PATH_REC_FIELD(reversible), 340 .offset_words = 13, 341 .offset_bits = 8, 342 .size_bits = 1 }, 343 { OPA_PATH_REC_FIELD(numb_path), 344 .offset_words = 13, 345 .offset_bits = 9, 346 .size_bits = 7 }, 347 { OPA_PATH_REC_FIELD(pkey), 348 .offset_words = 13, 349 .offset_bits = 16, 350 .size_bits = 16 }, 351 { OPA_PATH_REC_FIELD(opa.l2_8B), 352 .offset_words = 14, 353 .offset_bits = 0, 354 .size_bits = 1 }, 355 { OPA_PATH_REC_FIELD(opa.l2_10B), 356 .offset_words = 14, 357 .offset_bits = 1, 358 .size_bits = 1 }, 359 { OPA_PATH_REC_FIELD(opa.l2_9B), 360 .offset_words = 14, 361 .offset_bits = 2, 362 .size_bits = 1 }, 363 { OPA_PATH_REC_FIELD(opa.l2_16B), 364 .offset_words = 14, 365 .offset_bits = 3, 366 .size_bits = 1 }, 367 { RESERVED, 368 .offset_words = 14, 369 .offset_bits = 4, 370 .size_bits = 2 }, 371 { OPA_PATH_REC_FIELD(opa.qos_type), 372 .offset_words = 14, 373 .offset_bits = 6, 374 .size_bits = 2 }, 375 { OPA_PATH_REC_FIELD(opa.qos_priority), 376 .offset_words = 14, 377 .offset_bits = 8, 378 .size_bits = 8 }, 379 { RESERVED, 380 .offset_words = 14, 381 .offset_bits = 16, 382 .size_bits = 3 }, 383 { OPA_PATH_REC_FIELD(sl), 384 .offset_words = 14, 385 .offset_bits = 19, 386 .size_bits = 5 }, 387 { RESERVED, 388 .offset_words = 14, 389 .offset_bits = 24, 390 .size_bits = 8 }, 391 { OPA_PATH_REC_FIELD(mtu_selector), 392 .offset_words = 15, 393 .offset_bits = 0, 394 .size_bits = 2 }, 395 { OPA_PATH_REC_FIELD(mtu), 396 .offset_words = 15, 397 .offset_bits = 2, 398 .size_bits = 6 }, 399 { OPA_PATH_REC_FIELD(rate_selector), 400 .offset_words = 15, 401 .offset_bits = 8, 402 .size_bits = 2 }, 403 { OPA_PATH_REC_FIELD(rate), 404 .offset_words = 15, 405 .offset_bits = 10, 406 .size_bits = 6 }, 407 { OPA_PATH_REC_FIELD(packet_life_time_selector), 408 .offset_words = 15, 409 .offset_bits = 16, 410 .size_bits = 2 }, 411 { OPA_PATH_REC_FIELD(packet_life_time), 412 .offset_words = 15, 413 .offset_bits = 18, 414 .size_bits = 6 }, 415 { OPA_PATH_REC_FIELD(preference), 416 .offset_words = 15, 417 .offset_bits = 24, 418 .size_bits = 8 }, 419 }; 420 421 #define MCMEMBER_REC_FIELD(field) \ 422 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ 423 .struct_size_bytes = sizeof_field(struct ib_sa_mcmember_rec, field), \ 424 .field_name = "sa_mcmember_rec:" #field 425 426 static const struct ib_field mcmember_rec_table[] = { 427 { MCMEMBER_REC_FIELD(mgid), 428 .offset_words = 0, 429 .offset_bits = 0, 430 .size_bits = 128 }, 431 { MCMEMBER_REC_FIELD(port_gid), 432 .offset_words = 4, 433 .offset_bits = 0, 434 .size_bits = 128 }, 435 { MCMEMBER_REC_FIELD(qkey), 436 .offset_words = 8, 437 .offset_bits = 0, 438 .size_bits = 32 }, 439 { MCMEMBER_REC_FIELD(mlid), 440 .offset_words = 9, 441 .offset_bits = 0, 442 .size_bits = 16 }, 443 { MCMEMBER_REC_FIELD(mtu_selector), 444 .offset_words = 9, 445 .offset_bits = 16, 446 .size_bits = 2 }, 447 { MCMEMBER_REC_FIELD(mtu), 448 .offset_words = 9, 449 .offset_bits = 18, 450 .size_bits = 6 }, 451 { MCMEMBER_REC_FIELD(traffic_class), 452 .offset_words = 9, 453 .offset_bits = 24, 454 .size_bits = 8 }, 455 { MCMEMBER_REC_FIELD(pkey), 456 .offset_words = 10, 457 .offset_bits = 0, 458 .size_bits = 16 }, 459 { MCMEMBER_REC_FIELD(rate_selector), 460 .offset_words = 10, 461 .offset_bits = 16, 462 .size_bits = 2 }, 463 { MCMEMBER_REC_FIELD(rate), 464 .offset_words = 10, 465 .offset_bits = 18, 466 .size_bits = 6 }, 467 { MCMEMBER_REC_FIELD(packet_life_time_selector), 468 .offset_words = 10, 469 .offset_bits = 24, 470 .size_bits = 2 }, 471 { MCMEMBER_REC_FIELD(packet_life_time), 472 .offset_words = 10, 473 .offset_bits = 26, 474 .size_bits = 6 }, 475 { MCMEMBER_REC_FIELD(sl), 476 .offset_words = 11, 477 .offset_bits = 0, 478 .size_bits = 4 }, 479 { MCMEMBER_REC_FIELD(flow_label), 480 .offset_words = 11, 481 .offset_bits = 4, 482 .size_bits = 20 }, 483 { MCMEMBER_REC_FIELD(hop_limit), 484 .offset_words = 11, 485 .offset_bits = 24, 486 .size_bits = 8 }, 487 { MCMEMBER_REC_FIELD(scope), 488 .offset_words = 12, 489 .offset_bits = 0, 490 .size_bits = 4 }, 491 { MCMEMBER_REC_FIELD(join_state), 492 .offset_words = 12, 493 .offset_bits = 4, 494 .size_bits = 4 }, 495 { MCMEMBER_REC_FIELD(proxy_join), 496 .offset_words = 12, 497 .offset_bits = 8, 498 .size_bits = 1 }, 499 { RESERVED, 500 .offset_words = 12, 501 .offset_bits = 9, 502 .size_bits = 23 }, 503 }; 504 505 #define SERVICE_REC_FIELD(field) \ 506 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \ 507 .struct_size_bytes = sizeof_field(struct ib_sa_service_rec, field), \ 508 .field_name = "sa_service_rec:" #field 509 510 static const struct ib_field service_rec_table[] = { 511 { SERVICE_REC_FIELD(id), 512 .offset_words = 0, 513 .offset_bits = 0, 514 .size_bits = 64 }, 515 { SERVICE_REC_FIELD(gid), 516 .offset_words = 2, 517 .offset_bits = 0, 518 .size_bits = 128 }, 519 { SERVICE_REC_FIELD(pkey), 520 .offset_words = 6, 521 .offset_bits = 0, 522 .size_bits = 16 }, 523 { SERVICE_REC_FIELD(lease), 524 .offset_words = 7, 525 .offset_bits = 0, 526 .size_bits = 32 }, 527 { SERVICE_REC_FIELD(key), 528 .offset_words = 8, 529 .offset_bits = 0, 530 .size_bits = 128 }, 531 { SERVICE_REC_FIELD(name), 532 .offset_words = 12, 533 .offset_bits = 0, 534 .size_bits = 64*8 }, 535 { SERVICE_REC_FIELD(data8), 536 .offset_words = 28, 537 .offset_bits = 0, 538 .size_bits = 16*8 }, 539 { SERVICE_REC_FIELD(data16), 540 .offset_words = 32, 541 .offset_bits = 0, 542 .size_bits = 8*16 }, 543 { SERVICE_REC_FIELD(data32), 544 .offset_words = 36, 545 .offset_bits = 0, 546 .size_bits = 4*32 }, 547 { SERVICE_REC_FIELD(data64), 548 .offset_words = 40, 549 .offset_bits = 0, 550 .size_bits = 2*64 }, 551 }; 552 553 #define CLASSPORTINFO_REC_FIELD(field) \ 554 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \ 555 .struct_size_bytes = sizeof_field(struct ib_class_port_info, field), \ 556 .field_name = "ib_class_port_info:" #field 557 558 static const struct ib_field ib_classport_info_rec_table[] = { 559 { CLASSPORTINFO_REC_FIELD(base_version), 560 .offset_words = 0, 561 .offset_bits = 0, 562 .size_bits = 8 }, 563 { CLASSPORTINFO_REC_FIELD(class_version), 564 .offset_words = 0, 565 .offset_bits = 8, 566 .size_bits = 8 }, 567 { CLASSPORTINFO_REC_FIELD(capability_mask), 568 .offset_words = 0, 569 .offset_bits = 16, 570 .size_bits = 16 }, 571 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time), 572 .offset_words = 1, 573 .offset_bits = 0, 574 .size_bits = 32 }, 575 { CLASSPORTINFO_REC_FIELD(redirect_gid), 576 .offset_words = 2, 577 .offset_bits = 0, 578 .size_bits = 128 }, 579 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl), 580 .offset_words = 6, 581 .offset_bits = 0, 582 .size_bits = 32 }, 583 { CLASSPORTINFO_REC_FIELD(redirect_lid), 584 .offset_words = 7, 585 .offset_bits = 0, 586 .size_bits = 16 }, 587 { CLASSPORTINFO_REC_FIELD(redirect_pkey), 588 .offset_words = 7, 589 .offset_bits = 16, 590 .size_bits = 16 }, 591 592 { CLASSPORTINFO_REC_FIELD(redirect_qp), 593 .offset_words = 8, 594 .offset_bits = 0, 595 .size_bits = 32 }, 596 { CLASSPORTINFO_REC_FIELD(redirect_qkey), 597 .offset_words = 9, 598 .offset_bits = 0, 599 .size_bits = 32 }, 600 601 { CLASSPORTINFO_REC_FIELD(trap_gid), 602 .offset_words = 10, 603 .offset_bits = 0, 604 .size_bits = 128 }, 605 { CLASSPORTINFO_REC_FIELD(trap_tcslfl), 606 .offset_words = 14, 607 .offset_bits = 0, 608 .size_bits = 32 }, 609 610 { CLASSPORTINFO_REC_FIELD(trap_lid), 611 .offset_words = 15, 612 .offset_bits = 0, 613 .size_bits = 16 }, 614 { CLASSPORTINFO_REC_FIELD(trap_pkey), 615 .offset_words = 15, 616 .offset_bits = 16, 617 .size_bits = 16 }, 618 619 { CLASSPORTINFO_REC_FIELD(trap_hlqp), 620 .offset_words = 16, 621 .offset_bits = 0, 622 .size_bits = 32 }, 623 { CLASSPORTINFO_REC_FIELD(trap_qkey), 624 .offset_words = 17, 625 .offset_bits = 0, 626 .size_bits = 32 }, 627 }; 628 629 #define OPA_CLASSPORTINFO_REC_FIELD(field) \ 630 .struct_offset_bytes =\ 631 offsetof(struct opa_class_port_info, field), \ 632 .struct_size_bytes = \ 633 sizeof_field(struct opa_class_port_info, field), \ 634 .field_name = "opa_class_port_info:" #field 635 636 static const struct ib_field opa_classport_info_rec_table[] = { 637 { OPA_CLASSPORTINFO_REC_FIELD(base_version), 638 .offset_words = 0, 639 .offset_bits = 0, 640 .size_bits = 8 }, 641 { OPA_CLASSPORTINFO_REC_FIELD(class_version), 642 .offset_words = 0, 643 .offset_bits = 8, 644 .size_bits = 8 }, 645 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask), 646 .offset_words = 0, 647 .offset_bits = 16, 648 .size_bits = 16 }, 649 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time), 650 .offset_words = 1, 651 .offset_bits = 0, 652 .size_bits = 32 }, 653 { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid), 654 .offset_words = 2, 655 .offset_bits = 0, 656 .size_bits = 128 }, 657 { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl), 658 .offset_words = 6, 659 .offset_bits = 0, 660 .size_bits = 32 }, 661 { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid), 662 .offset_words = 7, 663 .offset_bits = 0, 664 .size_bits = 32 }, 665 { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp), 666 .offset_words = 8, 667 .offset_bits = 0, 668 .size_bits = 32 }, 669 { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey), 670 .offset_words = 9, 671 .offset_bits = 0, 672 .size_bits = 32 }, 673 { OPA_CLASSPORTINFO_REC_FIELD(trap_gid), 674 .offset_words = 10, 675 .offset_bits = 0, 676 .size_bits = 128 }, 677 { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl), 678 .offset_words = 14, 679 .offset_bits = 0, 680 .size_bits = 32 }, 681 { OPA_CLASSPORTINFO_REC_FIELD(trap_lid), 682 .offset_words = 15, 683 .offset_bits = 0, 684 .size_bits = 32 }, 685 { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp), 686 .offset_words = 16, 687 .offset_bits = 0, 688 .size_bits = 32 }, 689 { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey), 690 .offset_words = 17, 691 .offset_bits = 0, 692 .size_bits = 32 }, 693 { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey), 694 .offset_words = 18, 695 .offset_bits = 0, 696 .size_bits = 16 }, 697 { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey), 698 .offset_words = 18, 699 .offset_bits = 16, 700 .size_bits = 16 }, 701 { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd), 702 .offset_words = 19, 703 .offset_bits = 0, 704 .size_bits = 8 }, 705 { RESERVED, 706 .offset_words = 19, 707 .offset_bits = 8, 708 .size_bits = 24 }, 709 }; 710 711 #define GUIDINFO_REC_FIELD(field) \ 712 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \ 713 .struct_size_bytes = sizeof_field(struct ib_sa_guidinfo_rec, field), \ 714 .field_name = "sa_guidinfo_rec:" #field 715 716 static const struct ib_field guidinfo_rec_table[] = { 717 { GUIDINFO_REC_FIELD(lid), 718 .offset_words = 0, 719 .offset_bits = 0, 720 .size_bits = 16 }, 721 { GUIDINFO_REC_FIELD(block_num), 722 .offset_words = 0, 723 .offset_bits = 16, 724 .size_bits = 8 }, 725 { GUIDINFO_REC_FIELD(res1), 726 .offset_words = 0, 727 .offset_bits = 24, 728 .size_bits = 8 }, 729 { GUIDINFO_REC_FIELD(res2), 730 .offset_words = 1, 731 .offset_bits = 0, 732 .size_bits = 32 }, 733 { GUIDINFO_REC_FIELD(guid_info_list), 734 .offset_words = 2, 735 .offset_bits = 0, 736 .size_bits = 512 }, 737 }; 738 739 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query) 740 { 741 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE; 742 } 743 744 static inline int ib_sa_query_cancelled(struct ib_sa_query *query) 745 { 746 return (query->flags & IB_SA_CANCEL); 747 } 748 749 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb, 750 struct ib_sa_query *query) 751 { 752 struct sa_path_rec *sa_rec = query->mad_buf->context[1]; 753 struct ib_sa_mad *mad = query->mad_buf->mad; 754 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask; 755 u16 val16; 756 u64 val64; 757 struct rdma_ls_resolve_header *header; 758 759 query->mad_buf->context[1] = NULL; 760 761 /* Construct the family header first */ 762 header = skb_put(skb, NLMSG_ALIGN(sizeof(*header))); 763 memcpy(header->device_name, dev_name(&query->port->agent->device->dev), 764 LS_DEVICE_NAME_MAX); 765 header->port_num = query->port->port_num; 766 767 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) && 768 sa_rec->reversible != 0) 769 query->path_use = LS_RESOLVE_PATH_USE_GMP; 770 else 771 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL; 772 header->path_use = query->path_use; 773 774 /* Now build the attributes */ 775 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) { 776 val64 = be64_to_cpu(sa_rec->service_id); 777 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID, 778 sizeof(val64), &val64); 779 } 780 if (comp_mask & IB_SA_PATH_REC_DGID) 781 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID, 782 sizeof(sa_rec->dgid), &sa_rec->dgid); 783 if (comp_mask & IB_SA_PATH_REC_SGID) 784 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID, 785 sizeof(sa_rec->sgid), &sa_rec->sgid); 786 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS) 787 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS, 788 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class); 789 790 if (comp_mask & IB_SA_PATH_REC_PKEY) { 791 val16 = be16_to_cpu(sa_rec->pkey); 792 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY, 793 sizeof(val16), &val16); 794 } 795 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) { 796 val16 = be16_to_cpu(sa_rec->qos_class); 797 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS, 798 sizeof(val16), &val16); 799 } 800 } 801 802 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask) 803 { 804 int len = 0; 805 806 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) 807 len += nla_total_size(sizeof(u64)); 808 if (comp_mask & IB_SA_PATH_REC_DGID) 809 len += nla_total_size(sizeof(struct rdma_nla_ls_gid)); 810 if (comp_mask & IB_SA_PATH_REC_SGID) 811 len += nla_total_size(sizeof(struct rdma_nla_ls_gid)); 812 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS) 813 len += nla_total_size(sizeof(u8)); 814 if (comp_mask & IB_SA_PATH_REC_PKEY) 815 len += nla_total_size(sizeof(u16)); 816 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) 817 len += nla_total_size(sizeof(u16)); 818 819 /* 820 * Make sure that at least some of the required comp_mask bits are 821 * set. 822 */ 823 if (WARN_ON(len == 0)) 824 return len; 825 826 /* Add the family header */ 827 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header)); 828 829 return len; 830 } 831 832 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask) 833 { 834 struct sk_buff *skb = NULL; 835 struct nlmsghdr *nlh; 836 void *data; 837 struct ib_sa_mad *mad; 838 int len; 839 unsigned long flags; 840 unsigned long delay; 841 gfp_t gfp_flag; 842 int ret; 843 844 INIT_LIST_HEAD(&query->list); 845 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq); 846 847 mad = query->mad_buf->mad; 848 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask); 849 if (len <= 0) 850 return -EMSGSIZE; 851 852 skb = nlmsg_new(len, gfp_mask); 853 if (!skb) 854 return -ENOMEM; 855 856 /* Put nlmsg header only for now */ 857 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS, 858 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST); 859 if (!data) { 860 nlmsg_free(skb); 861 return -EMSGSIZE; 862 } 863 864 /* Add attributes */ 865 ib_nl_set_path_rec_attrs(skb, query); 866 867 /* Repair the nlmsg header length */ 868 nlmsg_end(skb, nlh); 869 870 gfp_flag = ((gfp_mask & GFP_ATOMIC) == GFP_ATOMIC) ? GFP_ATOMIC : 871 GFP_NOWAIT; 872 873 spin_lock_irqsave(&ib_nl_request_lock, flags); 874 ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_flag); 875 876 if (ret) 877 goto out; 878 879 /* Put the request on the list.*/ 880 delay = msecs_to_jiffies(sa_local_svc_timeout_ms); 881 query->timeout = delay + jiffies; 882 list_add_tail(&query->list, &ib_nl_request_list); 883 /* Start the timeout if this is the only request */ 884 if (ib_nl_request_list.next == &query->list) 885 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay); 886 887 out: 888 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 889 890 return ret; 891 } 892 893 static int ib_nl_cancel_request(struct ib_sa_query *query) 894 { 895 unsigned long flags; 896 struct ib_sa_query *wait_query; 897 int found = 0; 898 899 spin_lock_irqsave(&ib_nl_request_lock, flags); 900 list_for_each_entry(wait_query, &ib_nl_request_list, list) { 901 /* Let the timeout to take care of the callback */ 902 if (query == wait_query) { 903 query->flags |= IB_SA_CANCEL; 904 query->timeout = jiffies; 905 list_move(&query->list, &ib_nl_request_list); 906 found = 1; 907 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1); 908 break; 909 } 910 } 911 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 912 913 return found; 914 } 915 916 static void send_handler(struct ib_mad_agent *agent, 917 struct ib_mad_send_wc *mad_send_wc); 918 919 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query, 920 const struct nlmsghdr *nlh) 921 { 922 struct ib_mad_send_wc mad_send_wc; 923 struct ib_sa_mad *mad = NULL; 924 const struct nlattr *head, *curr; 925 struct ib_path_rec_data *rec; 926 int len, rem; 927 u32 mask = 0; 928 int status = -EIO; 929 930 if (query->callback) { 931 head = (const struct nlattr *) nlmsg_data(nlh); 932 len = nlmsg_len(nlh); 933 switch (query->path_use) { 934 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL: 935 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND; 936 break; 937 938 case LS_RESOLVE_PATH_USE_ALL: 939 case LS_RESOLVE_PATH_USE_GMP: 940 default: 941 mask = IB_PATH_PRIMARY | IB_PATH_GMP | 942 IB_PATH_BIDIRECTIONAL; 943 break; 944 } 945 nla_for_each_attr(curr, head, len, rem) { 946 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) { 947 rec = nla_data(curr); 948 /* 949 * Get the first one. In the future, we may 950 * need to get up to 6 pathrecords. 951 */ 952 if ((rec->flags & mask) == mask) { 953 mad = query->mad_buf->mad; 954 mad->mad_hdr.method |= 955 IB_MGMT_METHOD_RESP; 956 memcpy(mad->data, rec->path_rec, 957 sizeof(rec->path_rec)); 958 status = 0; 959 break; 960 } 961 } 962 } 963 query->callback(query, status, mad); 964 } 965 966 mad_send_wc.send_buf = query->mad_buf; 967 mad_send_wc.status = IB_WC_SUCCESS; 968 send_handler(query->mad_buf->mad_agent, &mad_send_wc); 969 } 970 971 static void ib_nl_request_timeout(struct work_struct *work) 972 { 973 unsigned long flags; 974 struct ib_sa_query *query; 975 unsigned long delay; 976 struct ib_mad_send_wc mad_send_wc; 977 int ret; 978 979 spin_lock_irqsave(&ib_nl_request_lock, flags); 980 while (!list_empty(&ib_nl_request_list)) { 981 query = list_entry(ib_nl_request_list.next, 982 struct ib_sa_query, list); 983 984 if (time_after(query->timeout, jiffies)) { 985 delay = query->timeout - jiffies; 986 if ((long)delay <= 0) 987 delay = 1; 988 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay); 989 break; 990 } 991 992 list_del(&query->list); 993 ib_sa_disable_local_svc(query); 994 /* Hold the lock to protect against query cancellation */ 995 if (ib_sa_query_cancelled(query)) 996 ret = -1; 997 else 998 ret = ib_post_send_mad(query->mad_buf, NULL); 999 if (ret) { 1000 mad_send_wc.send_buf = query->mad_buf; 1001 mad_send_wc.status = IB_WC_WR_FLUSH_ERR; 1002 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 1003 send_handler(query->port->agent, &mad_send_wc); 1004 spin_lock_irqsave(&ib_nl_request_lock, flags); 1005 } 1006 } 1007 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 1008 } 1009 1010 int ib_nl_handle_set_timeout(struct sk_buff *skb, 1011 struct nlmsghdr *nlh, 1012 struct netlink_ext_ack *extack) 1013 { 1014 int timeout, delta, abs_delta; 1015 const struct nlattr *attr; 1016 unsigned long flags; 1017 struct ib_sa_query *query; 1018 long delay = 0; 1019 struct nlattr *tb[LS_NLA_TYPE_MAX]; 1020 int ret; 1021 1022 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) || 1023 !(NETLINK_CB(skb).sk)) 1024 return -EPERM; 1025 1026 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), 1027 nlmsg_len(nlh), ib_nl_policy, NULL); 1028 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT]; 1029 if (ret || !attr) 1030 goto settimeout_out; 1031 1032 timeout = *(int *) nla_data(attr); 1033 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN) 1034 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN; 1035 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX) 1036 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX; 1037 1038 delta = timeout - sa_local_svc_timeout_ms; 1039 if (delta < 0) 1040 abs_delta = -delta; 1041 else 1042 abs_delta = delta; 1043 1044 if (delta != 0) { 1045 spin_lock_irqsave(&ib_nl_request_lock, flags); 1046 sa_local_svc_timeout_ms = timeout; 1047 list_for_each_entry(query, &ib_nl_request_list, list) { 1048 if (delta < 0 && abs_delta > query->timeout) 1049 query->timeout = 0; 1050 else 1051 query->timeout += delta; 1052 1053 /* Get the new delay from the first entry */ 1054 if (!delay) { 1055 delay = query->timeout - jiffies; 1056 if (delay <= 0) 1057 delay = 1; 1058 } 1059 } 1060 if (delay) 1061 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1062 (unsigned long)delay); 1063 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 1064 } 1065 1066 settimeout_out: 1067 return 0; 1068 } 1069 1070 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh) 1071 { 1072 struct nlattr *tb[LS_NLA_TYPE_MAX]; 1073 int ret; 1074 1075 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR) 1076 return 0; 1077 1078 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), 1079 nlmsg_len(nlh), ib_nl_policy, NULL); 1080 if (ret) 1081 return 0; 1082 1083 return 1; 1084 } 1085 1086 int ib_nl_handle_resolve_resp(struct sk_buff *skb, 1087 struct nlmsghdr *nlh, 1088 struct netlink_ext_ack *extack) 1089 { 1090 unsigned long flags; 1091 struct ib_sa_query *query; 1092 struct ib_mad_send_buf *send_buf; 1093 struct ib_mad_send_wc mad_send_wc; 1094 int found = 0; 1095 int ret; 1096 1097 if ((nlh->nlmsg_flags & NLM_F_REQUEST) || 1098 !(NETLINK_CB(skb).sk)) 1099 return -EPERM; 1100 1101 spin_lock_irqsave(&ib_nl_request_lock, flags); 1102 list_for_each_entry(query, &ib_nl_request_list, list) { 1103 /* 1104 * If the query is cancelled, let the timeout routine 1105 * take care of it. 1106 */ 1107 if (nlh->nlmsg_seq == query->seq) { 1108 found = !ib_sa_query_cancelled(query); 1109 if (found) 1110 list_del(&query->list); 1111 break; 1112 } 1113 } 1114 1115 if (!found) { 1116 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 1117 goto resp_out; 1118 } 1119 1120 send_buf = query->mad_buf; 1121 1122 if (!ib_nl_is_good_resolve_resp(nlh)) { 1123 /* if the result is a failure, send out the packet via IB */ 1124 ib_sa_disable_local_svc(query); 1125 ret = ib_post_send_mad(query->mad_buf, NULL); 1126 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 1127 if (ret) { 1128 mad_send_wc.send_buf = send_buf; 1129 mad_send_wc.status = IB_WC_GENERAL_ERR; 1130 send_handler(query->port->agent, &mad_send_wc); 1131 } 1132 } else { 1133 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 1134 ib_nl_process_good_resolve_rsp(query, nlh); 1135 } 1136 1137 resp_out: 1138 return 0; 1139 } 1140 1141 static void free_sm_ah(struct kref *kref) 1142 { 1143 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); 1144 1145 rdma_destroy_ah(sm_ah->ah, 0); 1146 kfree(sm_ah); 1147 } 1148 1149 void ib_sa_register_client(struct ib_sa_client *client) 1150 { 1151 atomic_set(&client->users, 1); 1152 init_completion(&client->comp); 1153 } 1154 EXPORT_SYMBOL(ib_sa_register_client); 1155 1156 void ib_sa_unregister_client(struct ib_sa_client *client) 1157 { 1158 ib_sa_client_put(client); 1159 wait_for_completion(&client->comp); 1160 } 1161 EXPORT_SYMBOL(ib_sa_unregister_client); 1162 1163 /** 1164 * ib_sa_cancel_query - try to cancel an SA query 1165 * @id:ID of query to cancel 1166 * @query:query pointer to cancel 1167 * 1168 * Try to cancel an SA query. If the id and query don't match up or 1169 * the query has already completed, nothing is done. Otherwise the 1170 * query is canceled and will complete with a status of -EINTR. 1171 */ 1172 void ib_sa_cancel_query(int id, struct ib_sa_query *query) 1173 { 1174 unsigned long flags; 1175 struct ib_mad_agent *agent; 1176 struct ib_mad_send_buf *mad_buf; 1177 1178 xa_lock_irqsave(&queries, flags); 1179 if (xa_load(&queries, id) != query) { 1180 xa_unlock_irqrestore(&queries, flags); 1181 return; 1182 } 1183 agent = query->port->agent; 1184 mad_buf = query->mad_buf; 1185 xa_unlock_irqrestore(&queries, flags); 1186 1187 /* 1188 * If the query is still on the netlink request list, schedule 1189 * it to be cancelled by the timeout routine. Otherwise, it has been 1190 * sent to the MAD layer and has to be cancelled from there. 1191 */ 1192 if (!ib_nl_cancel_request(query)) 1193 ib_cancel_mad(agent, mad_buf); 1194 } 1195 EXPORT_SYMBOL(ib_sa_cancel_query); 1196 1197 static u8 get_src_path_mask(struct ib_device *device, u8 port_num) 1198 { 1199 struct ib_sa_device *sa_dev; 1200 struct ib_sa_port *port; 1201 unsigned long flags; 1202 u8 src_path_mask; 1203 1204 sa_dev = ib_get_client_data(device, &sa_client); 1205 if (!sa_dev) 1206 return 0x7f; 1207 1208 port = &sa_dev->port[port_num - sa_dev->start_port]; 1209 spin_lock_irqsave(&port->ah_lock, flags); 1210 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f; 1211 spin_unlock_irqrestore(&port->ah_lock, flags); 1212 1213 return src_path_mask; 1214 } 1215 1216 static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num, 1217 struct sa_path_rec *rec, 1218 struct rdma_ah_attr *ah_attr, 1219 const struct ib_gid_attr *gid_attr) 1220 { 1221 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec); 1222 1223 if (!gid_attr) { 1224 gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type, 1225 port_num, NULL); 1226 if (IS_ERR(gid_attr)) 1227 return PTR_ERR(gid_attr); 1228 } else 1229 rdma_hold_gid_attr(gid_attr); 1230 1231 rdma_move_grh_sgid_attr(ah_attr, &rec->dgid, 1232 be32_to_cpu(rec->flow_label), 1233 rec->hop_limit, rec->traffic_class, 1234 gid_attr); 1235 return 0; 1236 } 1237 1238 /** 1239 * ib_init_ah_attr_from_path - Initialize address handle attributes based on 1240 * an SA path record. 1241 * @device: Device associated ah attributes initialization. 1242 * @port_num: Port on the specified device. 1243 * @rec: path record entry to use for ah attributes initialization. 1244 * @ah_attr: address handle attributes to initialization from path record. 1245 * @gid_attr: SGID attribute to consider during initialization. 1246 * 1247 * When ib_init_ah_attr_from_path() returns success, 1248 * (a) for IB link layer it optionally contains a reference to SGID attribute 1249 * when GRH is present for IB link layer. 1250 * (b) for RoCE link layer it contains a reference to SGID attribute. 1251 * User must invoke rdma_destroy_ah_attr() to release reference to SGID 1252 * attributes which are initialized using ib_init_ah_attr_from_path(). 1253 */ 1254 int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num, 1255 struct sa_path_rec *rec, 1256 struct rdma_ah_attr *ah_attr, 1257 const struct ib_gid_attr *gid_attr) 1258 { 1259 int ret = 0; 1260 1261 memset(ah_attr, 0, sizeof(*ah_attr)); 1262 ah_attr->type = rdma_ah_find_type(device, port_num); 1263 rdma_ah_set_sl(ah_attr, rec->sl); 1264 rdma_ah_set_port_num(ah_attr, port_num); 1265 rdma_ah_set_static_rate(ah_attr, rec->rate); 1266 1267 if (sa_path_is_roce(rec)) { 1268 ret = roce_resolve_route_from_path(rec, gid_attr); 1269 if (ret) 1270 return ret; 1271 1272 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN); 1273 } else { 1274 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec))); 1275 if (sa_path_is_opa(rec) && 1276 rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE)) 1277 rdma_ah_set_make_grd(ah_attr, true); 1278 1279 rdma_ah_set_path_bits(ah_attr, 1280 be32_to_cpu(sa_path_get_slid(rec)) & 1281 get_src_path_mask(device, port_num)); 1282 } 1283 1284 if (rec->hop_limit > 0 || sa_path_is_roce(rec)) 1285 ret = init_ah_attr_grh_fields(device, port_num, 1286 rec, ah_attr, gid_attr); 1287 return ret; 1288 } 1289 EXPORT_SYMBOL(ib_init_ah_attr_from_path); 1290 1291 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask) 1292 { 1293 struct rdma_ah_attr ah_attr; 1294 unsigned long flags; 1295 1296 spin_lock_irqsave(&query->port->ah_lock, flags); 1297 if (!query->port->sm_ah) { 1298 spin_unlock_irqrestore(&query->port->ah_lock, flags); 1299 return -EAGAIN; 1300 } 1301 kref_get(&query->port->sm_ah->ref); 1302 query->sm_ah = query->port->sm_ah; 1303 spin_unlock_irqrestore(&query->port->ah_lock, flags); 1304 1305 /* 1306 * Always check if sm_ah has valid dlid assigned, 1307 * before querying for class port info 1308 */ 1309 if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) || 1310 !rdma_is_valid_unicast_lid(&ah_attr)) { 1311 kref_put(&query->sm_ah->ref, free_sm_ah); 1312 return -EAGAIN; 1313 } 1314 query->mad_buf = ib_create_send_mad(query->port->agent, 1, 1315 query->sm_ah->pkey_index, 1316 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA, 1317 gfp_mask, 1318 ((query->flags & IB_SA_QUERY_OPA) ? 1319 OPA_MGMT_BASE_VERSION : 1320 IB_MGMT_BASE_VERSION)); 1321 if (IS_ERR(query->mad_buf)) { 1322 kref_put(&query->sm_ah->ref, free_sm_ah); 1323 return -ENOMEM; 1324 } 1325 1326 query->mad_buf->ah = query->sm_ah->ah; 1327 1328 return 0; 1329 } 1330 1331 static void free_mad(struct ib_sa_query *query) 1332 { 1333 ib_free_send_mad(query->mad_buf); 1334 kref_put(&query->sm_ah->ref, free_sm_ah); 1335 } 1336 1337 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent) 1338 { 1339 struct ib_sa_mad *mad = query->mad_buf->mad; 1340 unsigned long flags; 1341 1342 memset(mad, 0, sizeof *mad); 1343 1344 if (query->flags & IB_SA_QUERY_OPA) { 1345 mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION; 1346 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION; 1347 } else { 1348 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; 1349 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; 1350 } 1351 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; 1352 spin_lock_irqsave(&tid_lock, flags); 1353 mad->mad_hdr.tid = 1354 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); 1355 spin_unlock_irqrestore(&tid_lock, flags); 1356 } 1357 1358 static int send_mad(struct ib_sa_query *query, unsigned long timeout_ms, 1359 gfp_t gfp_mask) 1360 { 1361 unsigned long flags; 1362 int ret, id; 1363 1364 xa_lock_irqsave(&queries, flags); 1365 ret = __xa_alloc(&queries, &id, query, xa_limit_32b, gfp_mask); 1366 xa_unlock_irqrestore(&queries, flags); 1367 if (ret < 0) 1368 return ret; 1369 1370 query->mad_buf->timeout_ms = timeout_ms; 1371 query->mad_buf->context[0] = query; 1372 query->id = id; 1373 1374 if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) && 1375 (!(query->flags & IB_SA_QUERY_OPA))) { 1376 if (rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) { 1377 if (!ib_nl_make_request(query, gfp_mask)) 1378 return id; 1379 } 1380 ib_sa_disable_local_svc(query); 1381 } 1382 1383 ret = ib_post_send_mad(query->mad_buf, NULL); 1384 if (ret) { 1385 xa_lock_irqsave(&queries, flags); 1386 __xa_erase(&queries, id); 1387 xa_unlock_irqrestore(&queries, flags); 1388 } 1389 1390 /* 1391 * It's not safe to dereference query any more, because the 1392 * send may already have completed and freed the query in 1393 * another context. 1394 */ 1395 return ret ? ret : id; 1396 } 1397 1398 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec) 1399 { 1400 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec); 1401 } 1402 EXPORT_SYMBOL(ib_sa_unpack_path); 1403 1404 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute) 1405 { 1406 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute); 1407 } 1408 EXPORT_SYMBOL(ib_sa_pack_path); 1409 1410 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client, 1411 struct ib_sa_device *sa_dev, 1412 u8 port_num) 1413 { 1414 struct ib_sa_port *port; 1415 unsigned long flags; 1416 bool ret = false; 1417 1418 port = &sa_dev->port[port_num - sa_dev->start_port]; 1419 spin_lock_irqsave(&port->classport_lock, flags); 1420 if (!port->classport_info.valid) 1421 goto ret; 1422 1423 if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA) 1424 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) & 1425 OPA_CLASS_PORT_INFO_PR_SUPPORT; 1426 ret: 1427 spin_unlock_irqrestore(&port->classport_lock, flags); 1428 return ret; 1429 } 1430 1431 enum opa_pr_supported { 1432 PR_NOT_SUPPORTED, 1433 PR_OPA_SUPPORTED, 1434 PR_IB_SUPPORTED 1435 }; 1436 1437 /* 1438 * opa_pr_query_possible - Check if current PR query can be an OPA query. 1439 * 1440 * Retuns PR_NOT_SUPPORTED if a path record query is not 1441 * possible, PR_OPA_SUPPORTED if an OPA path record query 1442 * is possible and PR_IB_SUPPORTED if an IB path record 1443 * query is possible. 1444 */ 1445 static int opa_pr_query_possible(struct ib_sa_client *client, 1446 struct ib_sa_device *sa_dev, 1447 struct ib_device *device, u8 port_num, 1448 struct sa_path_rec *rec) 1449 { 1450 struct ib_port_attr port_attr; 1451 1452 if (ib_query_port(device, port_num, &port_attr)) 1453 return PR_NOT_SUPPORTED; 1454 1455 if (ib_sa_opa_pathrecord_support(client, sa_dev, port_num)) 1456 return PR_OPA_SUPPORTED; 1457 1458 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) 1459 return PR_NOT_SUPPORTED; 1460 else 1461 return PR_IB_SUPPORTED; 1462 } 1463 1464 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, 1465 int status, 1466 struct ib_sa_mad *mad) 1467 { 1468 struct ib_sa_path_query *query = 1469 container_of(sa_query, struct ib_sa_path_query, sa_query); 1470 1471 if (mad) { 1472 struct sa_path_rec rec; 1473 1474 if (sa_query->flags & IB_SA_QUERY_OPA) { 1475 ib_unpack(opa_path_rec_table, 1476 ARRAY_SIZE(opa_path_rec_table), 1477 mad->data, &rec); 1478 rec.rec_type = SA_PATH_REC_TYPE_OPA; 1479 query->callback(status, &rec, query->context); 1480 } else { 1481 ib_unpack(path_rec_table, 1482 ARRAY_SIZE(path_rec_table), 1483 mad->data, &rec); 1484 rec.rec_type = SA_PATH_REC_TYPE_IB; 1485 sa_path_set_dmac_zero(&rec); 1486 1487 if (query->conv_pr) { 1488 struct sa_path_rec opa; 1489 1490 memset(&opa, 0, sizeof(struct sa_path_rec)); 1491 sa_convert_path_ib_to_opa(&opa, &rec); 1492 query->callback(status, &opa, query->context); 1493 } else { 1494 query->callback(status, &rec, query->context); 1495 } 1496 } 1497 } else 1498 query->callback(status, NULL, query->context); 1499 } 1500 1501 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) 1502 { 1503 struct ib_sa_path_query *query = 1504 container_of(sa_query, struct ib_sa_path_query, sa_query); 1505 1506 kfree(query->conv_pr); 1507 kfree(query); 1508 } 1509 1510 /** 1511 * ib_sa_path_rec_get - Start a Path get query 1512 * @client:SA client 1513 * @device:device to send query on 1514 * @port_num: port number to send query on 1515 * @rec:Path Record to send in query 1516 * @comp_mask:component mask to send in query 1517 * @timeout_ms:time to wait for response 1518 * @gfp_mask:GFP mask to use for internal allocations 1519 * @callback:function called when query completes, times out or is 1520 * canceled 1521 * @context:opaque user context passed to callback 1522 * @sa_query:query context, used to cancel query 1523 * 1524 * Send a Path Record Get query to the SA to look up a path. The 1525 * callback function will be called when the query completes (or 1526 * fails); status is 0 for a successful response, -EINTR if the query 1527 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 1528 * occurred sending the query. The resp parameter of the callback is 1529 * only valid if status is 0. 1530 * 1531 * If the return value of ib_sa_path_rec_get() is negative, it is an 1532 * error code. Otherwise it is a query ID that can be used to cancel 1533 * the query. 1534 */ 1535 int ib_sa_path_rec_get(struct ib_sa_client *client, 1536 struct ib_device *device, u8 port_num, 1537 struct sa_path_rec *rec, 1538 ib_sa_comp_mask comp_mask, 1539 unsigned long timeout_ms, gfp_t gfp_mask, 1540 void (*callback)(int status, 1541 struct sa_path_rec *resp, 1542 void *context), 1543 void *context, 1544 struct ib_sa_query **sa_query) 1545 { 1546 struct ib_sa_path_query *query; 1547 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1548 struct ib_sa_port *port; 1549 struct ib_mad_agent *agent; 1550 struct ib_sa_mad *mad; 1551 enum opa_pr_supported status; 1552 int ret; 1553 1554 if (!sa_dev) 1555 return -ENODEV; 1556 1557 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) && 1558 (rec->rec_type != SA_PATH_REC_TYPE_OPA)) 1559 return -EINVAL; 1560 1561 port = &sa_dev->port[port_num - sa_dev->start_port]; 1562 agent = port->agent; 1563 1564 query = kzalloc(sizeof(*query), gfp_mask); 1565 if (!query) 1566 return -ENOMEM; 1567 1568 query->sa_query.port = port; 1569 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { 1570 status = opa_pr_query_possible(client, sa_dev, device, port_num, 1571 rec); 1572 if (status == PR_NOT_SUPPORTED) { 1573 ret = -EINVAL; 1574 goto err1; 1575 } else if (status == PR_OPA_SUPPORTED) { 1576 query->sa_query.flags |= IB_SA_QUERY_OPA; 1577 } else { 1578 query->conv_pr = 1579 kmalloc(sizeof(*query->conv_pr), gfp_mask); 1580 if (!query->conv_pr) { 1581 ret = -ENOMEM; 1582 goto err1; 1583 } 1584 } 1585 } 1586 1587 ret = alloc_mad(&query->sa_query, gfp_mask); 1588 if (ret) 1589 goto err2; 1590 1591 ib_sa_client_get(client); 1592 query->sa_query.client = client; 1593 query->callback = callback; 1594 query->context = context; 1595 1596 mad = query->sa_query.mad_buf->mad; 1597 init_mad(&query->sa_query, agent); 1598 1599 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; 1600 query->sa_query.release = ib_sa_path_rec_release; 1601 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 1602 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); 1603 mad->sa_hdr.comp_mask = comp_mask; 1604 1605 if (query->sa_query.flags & IB_SA_QUERY_OPA) { 1606 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table), 1607 rec, mad->data); 1608 } else if (query->conv_pr) { 1609 sa_convert_path_opa_to_ib(query->conv_pr, rec); 1610 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), 1611 query->conv_pr, mad->data); 1612 } else { 1613 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), 1614 rec, mad->data); 1615 } 1616 1617 *sa_query = &query->sa_query; 1618 1619 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE; 1620 query->sa_query.mad_buf->context[1] = (query->conv_pr) ? 1621 query->conv_pr : rec; 1622 1623 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1624 if (ret < 0) 1625 goto err3; 1626 1627 return ret; 1628 1629 err3: 1630 *sa_query = NULL; 1631 ib_sa_client_put(query->sa_query.client); 1632 free_mad(&query->sa_query); 1633 err2: 1634 kfree(query->conv_pr); 1635 err1: 1636 kfree(query); 1637 return ret; 1638 } 1639 EXPORT_SYMBOL(ib_sa_path_rec_get); 1640 1641 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, 1642 int status, 1643 struct ib_sa_mad *mad) 1644 { 1645 struct ib_sa_service_query *query = 1646 container_of(sa_query, struct ib_sa_service_query, sa_query); 1647 1648 if (mad) { 1649 struct ib_sa_service_rec rec; 1650 1651 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), 1652 mad->data, &rec); 1653 query->callback(status, &rec, query->context); 1654 } else 1655 query->callback(status, NULL, query->context); 1656 } 1657 1658 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) 1659 { 1660 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); 1661 } 1662 1663 /** 1664 * ib_sa_service_rec_query - Start Service Record operation 1665 * @client:SA client 1666 * @device:device to send request on 1667 * @port_num: port number to send request on 1668 * @method:SA method - should be get, set, or delete 1669 * @rec:Service Record to send in request 1670 * @comp_mask:component mask to send in request 1671 * @timeout_ms:time to wait for response 1672 * @gfp_mask:GFP mask to use for internal allocations 1673 * @callback:function called when request completes, times out or is 1674 * canceled 1675 * @context:opaque user context passed to callback 1676 * @sa_query:request context, used to cancel request 1677 * 1678 * Send a Service Record set/get/delete to the SA to register, 1679 * unregister or query a service record. 1680 * The callback function will be called when the request completes (or 1681 * fails); status is 0 for a successful response, -EINTR if the query 1682 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 1683 * occurred sending the query. The resp parameter of the callback is 1684 * only valid if status is 0. 1685 * 1686 * If the return value of ib_sa_service_rec_query() is negative, it is an 1687 * error code. Otherwise it is a request ID that can be used to cancel 1688 * the query. 1689 */ 1690 int ib_sa_service_rec_query(struct ib_sa_client *client, 1691 struct ib_device *device, u8 port_num, u8 method, 1692 struct ib_sa_service_rec *rec, 1693 ib_sa_comp_mask comp_mask, 1694 unsigned long timeout_ms, gfp_t gfp_mask, 1695 void (*callback)(int status, 1696 struct ib_sa_service_rec *resp, 1697 void *context), 1698 void *context, 1699 struct ib_sa_query **sa_query) 1700 { 1701 struct ib_sa_service_query *query; 1702 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1703 struct ib_sa_port *port; 1704 struct ib_mad_agent *agent; 1705 struct ib_sa_mad *mad; 1706 int ret; 1707 1708 if (!sa_dev) 1709 return -ENODEV; 1710 1711 port = &sa_dev->port[port_num - sa_dev->start_port]; 1712 agent = port->agent; 1713 1714 if (method != IB_MGMT_METHOD_GET && 1715 method != IB_MGMT_METHOD_SET && 1716 method != IB_SA_METHOD_DELETE) 1717 return -EINVAL; 1718 1719 query = kzalloc(sizeof(*query), gfp_mask); 1720 if (!query) 1721 return -ENOMEM; 1722 1723 query->sa_query.port = port; 1724 ret = alloc_mad(&query->sa_query, gfp_mask); 1725 if (ret) 1726 goto err1; 1727 1728 ib_sa_client_get(client); 1729 query->sa_query.client = client; 1730 query->callback = callback; 1731 query->context = context; 1732 1733 mad = query->sa_query.mad_buf->mad; 1734 init_mad(&query->sa_query, agent); 1735 1736 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; 1737 query->sa_query.release = ib_sa_service_rec_release; 1738 mad->mad_hdr.method = method; 1739 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC); 1740 mad->sa_hdr.comp_mask = comp_mask; 1741 1742 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), 1743 rec, mad->data); 1744 1745 *sa_query = &query->sa_query; 1746 1747 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1748 if (ret < 0) 1749 goto err2; 1750 1751 return ret; 1752 1753 err2: 1754 *sa_query = NULL; 1755 ib_sa_client_put(query->sa_query.client); 1756 free_mad(&query->sa_query); 1757 1758 err1: 1759 kfree(query); 1760 return ret; 1761 } 1762 EXPORT_SYMBOL(ib_sa_service_rec_query); 1763 1764 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, 1765 int status, 1766 struct ib_sa_mad *mad) 1767 { 1768 struct ib_sa_mcmember_query *query = 1769 container_of(sa_query, struct ib_sa_mcmember_query, sa_query); 1770 1771 if (mad) { 1772 struct ib_sa_mcmember_rec rec; 1773 1774 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1775 mad->data, &rec); 1776 query->callback(status, &rec, query->context); 1777 } else 1778 query->callback(status, NULL, query->context); 1779 } 1780 1781 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) 1782 { 1783 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); 1784 } 1785 1786 int ib_sa_mcmember_rec_query(struct ib_sa_client *client, 1787 struct ib_device *device, u8 port_num, 1788 u8 method, 1789 struct ib_sa_mcmember_rec *rec, 1790 ib_sa_comp_mask comp_mask, 1791 unsigned long timeout_ms, gfp_t gfp_mask, 1792 void (*callback)(int status, 1793 struct ib_sa_mcmember_rec *resp, 1794 void *context), 1795 void *context, 1796 struct ib_sa_query **sa_query) 1797 { 1798 struct ib_sa_mcmember_query *query; 1799 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1800 struct ib_sa_port *port; 1801 struct ib_mad_agent *agent; 1802 struct ib_sa_mad *mad; 1803 int ret; 1804 1805 if (!sa_dev) 1806 return -ENODEV; 1807 1808 port = &sa_dev->port[port_num - sa_dev->start_port]; 1809 agent = port->agent; 1810 1811 query = kzalloc(sizeof(*query), gfp_mask); 1812 if (!query) 1813 return -ENOMEM; 1814 1815 query->sa_query.port = port; 1816 ret = alloc_mad(&query->sa_query, gfp_mask); 1817 if (ret) 1818 goto err1; 1819 1820 ib_sa_client_get(client); 1821 query->sa_query.client = client; 1822 query->callback = callback; 1823 query->context = context; 1824 1825 mad = query->sa_query.mad_buf->mad; 1826 init_mad(&query->sa_query, agent); 1827 1828 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; 1829 query->sa_query.release = ib_sa_mcmember_rec_release; 1830 mad->mad_hdr.method = method; 1831 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); 1832 mad->sa_hdr.comp_mask = comp_mask; 1833 1834 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1835 rec, mad->data); 1836 1837 *sa_query = &query->sa_query; 1838 1839 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1840 if (ret < 0) 1841 goto err2; 1842 1843 return ret; 1844 1845 err2: 1846 *sa_query = NULL; 1847 ib_sa_client_put(query->sa_query.client); 1848 free_mad(&query->sa_query); 1849 1850 err1: 1851 kfree(query); 1852 return ret; 1853 } 1854 1855 /* Support GuidInfoRecord */ 1856 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query, 1857 int status, 1858 struct ib_sa_mad *mad) 1859 { 1860 struct ib_sa_guidinfo_query *query = 1861 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query); 1862 1863 if (mad) { 1864 struct ib_sa_guidinfo_rec rec; 1865 1866 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), 1867 mad->data, &rec); 1868 query->callback(status, &rec, query->context); 1869 } else 1870 query->callback(status, NULL, query->context); 1871 } 1872 1873 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query) 1874 { 1875 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query)); 1876 } 1877 1878 int ib_sa_guid_info_rec_query(struct ib_sa_client *client, 1879 struct ib_device *device, u8 port_num, 1880 struct ib_sa_guidinfo_rec *rec, 1881 ib_sa_comp_mask comp_mask, u8 method, 1882 unsigned long timeout_ms, gfp_t gfp_mask, 1883 void (*callback)(int status, 1884 struct ib_sa_guidinfo_rec *resp, 1885 void *context), 1886 void *context, 1887 struct ib_sa_query **sa_query) 1888 { 1889 struct ib_sa_guidinfo_query *query; 1890 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1891 struct ib_sa_port *port; 1892 struct ib_mad_agent *agent; 1893 struct ib_sa_mad *mad; 1894 int ret; 1895 1896 if (!sa_dev) 1897 return -ENODEV; 1898 1899 if (method != IB_MGMT_METHOD_GET && 1900 method != IB_MGMT_METHOD_SET && 1901 method != IB_SA_METHOD_DELETE) { 1902 return -EINVAL; 1903 } 1904 1905 port = &sa_dev->port[port_num - sa_dev->start_port]; 1906 agent = port->agent; 1907 1908 query = kzalloc(sizeof(*query), gfp_mask); 1909 if (!query) 1910 return -ENOMEM; 1911 1912 query->sa_query.port = port; 1913 ret = alloc_mad(&query->sa_query, gfp_mask); 1914 if (ret) 1915 goto err1; 1916 1917 ib_sa_client_get(client); 1918 query->sa_query.client = client; 1919 query->callback = callback; 1920 query->context = context; 1921 1922 mad = query->sa_query.mad_buf->mad; 1923 init_mad(&query->sa_query, agent); 1924 1925 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL; 1926 query->sa_query.release = ib_sa_guidinfo_rec_release; 1927 1928 mad->mad_hdr.method = method; 1929 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC); 1930 mad->sa_hdr.comp_mask = comp_mask; 1931 1932 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec, 1933 mad->data); 1934 1935 *sa_query = &query->sa_query; 1936 1937 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1938 if (ret < 0) 1939 goto err2; 1940 1941 return ret; 1942 1943 err2: 1944 *sa_query = NULL; 1945 ib_sa_client_put(query->sa_query.client); 1946 free_mad(&query->sa_query); 1947 1948 err1: 1949 kfree(query); 1950 return ret; 1951 } 1952 EXPORT_SYMBOL(ib_sa_guid_info_rec_query); 1953 1954 struct ib_classport_info_context { 1955 struct completion done; 1956 struct ib_sa_query *sa_query; 1957 }; 1958 1959 static void ib_classportinfo_cb(void *context) 1960 { 1961 struct ib_classport_info_context *cb_ctx = context; 1962 1963 complete(&cb_ctx->done); 1964 } 1965 1966 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query, 1967 int status, 1968 struct ib_sa_mad *mad) 1969 { 1970 unsigned long flags; 1971 struct ib_sa_classport_info_query *query = 1972 container_of(sa_query, struct ib_sa_classport_info_query, sa_query); 1973 struct ib_sa_classport_cache *info = &sa_query->port->classport_info; 1974 1975 if (mad) { 1976 if (sa_query->flags & IB_SA_QUERY_OPA) { 1977 struct opa_class_port_info rec; 1978 1979 ib_unpack(opa_classport_info_rec_table, 1980 ARRAY_SIZE(opa_classport_info_rec_table), 1981 mad->data, &rec); 1982 1983 spin_lock_irqsave(&sa_query->port->classport_lock, 1984 flags); 1985 if (!status && !info->valid) { 1986 memcpy(&info->data.opa, &rec, 1987 sizeof(info->data.opa)); 1988 1989 info->valid = true; 1990 info->data.type = RDMA_CLASS_PORT_INFO_OPA; 1991 } 1992 spin_unlock_irqrestore(&sa_query->port->classport_lock, 1993 flags); 1994 1995 } else { 1996 struct ib_class_port_info rec; 1997 1998 ib_unpack(ib_classport_info_rec_table, 1999 ARRAY_SIZE(ib_classport_info_rec_table), 2000 mad->data, &rec); 2001 2002 spin_lock_irqsave(&sa_query->port->classport_lock, 2003 flags); 2004 if (!status && !info->valid) { 2005 memcpy(&info->data.ib, &rec, 2006 sizeof(info->data.ib)); 2007 2008 info->valid = true; 2009 info->data.type = RDMA_CLASS_PORT_INFO_IB; 2010 } 2011 spin_unlock_irqrestore(&sa_query->port->classport_lock, 2012 flags); 2013 } 2014 } 2015 query->callback(query->context); 2016 } 2017 2018 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query) 2019 { 2020 kfree(container_of(sa_query, struct ib_sa_classport_info_query, 2021 sa_query)); 2022 } 2023 2024 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port, 2025 unsigned long timeout_ms, 2026 void (*callback)(void *context), 2027 void *context, 2028 struct ib_sa_query **sa_query) 2029 { 2030 struct ib_mad_agent *agent; 2031 struct ib_sa_classport_info_query *query; 2032 struct ib_sa_mad *mad; 2033 gfp_t gfp_mask = GFP_KERNEL; 2034 int ret; 2035 2036 agent = port->agent; 2037 2038 query = kzalloc(sizeof(*query), gfp_mask); 2039 if (!query) 2040 return -ENOMEM; 2041 2042 query->sa_query.port = port; 2043 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device, 2044 port->port_num) ? 2045 IB_SA_QUERY_OPA : 0; 2046 ret = alloc_mad(&query->sa_query, gfp_mask); 2047 if (ret) 2048 goto err_free; 2049 2050 query->callback = callback; 2051 query->context = context; 2052 2053 mad = query->sa_query.mad_buf->mad; 2054 init_mad(&query->sa_query, agent); 2055 2056 query->sa_query.callback = ib_sa_classport_info_rec_callback; 2057 query->sa_query.release = ib_sa_classport_info_rec_release; 2058 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 2059 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO); 2060 mad->sa_hdr.comp_mask = 0; 2061 *sa_query = &query->sa_query; 2062 2063 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 2064 if (ret < 0) 2065 goto err_free_mad; 2066 2067 return ret; 2068 2069 err_free_mad: 2070 *sa_query = NULL; 2071 free_mad(&query->sa_query); 2072 2073 err_free: 2074 kfree(query); 2075 return ret; 2076 } 2077 2078 static void update_ib_cpi(struct work_struct *work) 2079 { 2080 struct ib_sa_port *port = 2081 container_of(work, struct ib_sa_port, ib_cpi_work.work); 2082 struct ib_classport_info_context *cb_context; 2083 unsigned long flags; 2084 int ret; 2085 2086 /* If the classport info is valid, nothing 2087 * to do here. 2088 */ 2089 spin_lock_irqsave(&port->classport_lock, flags); 2090 if (port->classport_info.valid) { 2091 spin_unlock_irqrestore(&port->classport_lock, flags); 2092 return; 2093 } 2094 spin_unlock_irqrestore(&port->classport_lock, flags); 2095 2096 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL); 2097 if (!cb_context) 2098 goto err_nomem; 2099 2100 init_completion(&cb_context->done); 2101 2102 ret = ib_sa_classport_info_rec_query(port, 3000, 2103 ib_classportinfo_cb, cb_context, 2104 &cb_context->sa_query); 2105 if (ret < 0) 2106 goto free_cb_err; 2107 wait_for_completion(&cb_context->done); 2108 free_cb_err: 2109 kfree(cb_context); 2110 spin_lock_irqsave(&port->classport_lock, flags); 2111 2112 /* If the classport info is still not valid, the query should have 2113 * failed for some reason. Retry issuing the query 2114 */ 2115 if (!port->classport_info.valid) { 2116 port->classport_info.retry_cnt++; 2117 if (port->classport_info.retry_cnt <= 2118 IB_SA_CPI_MAX_RETRY_CNT) { 2119 unsigned long delay = 2120 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT); 2121 2122 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay); 2123 } 2124 } 2125 spin_unlock_irqrestore(&port->classport_lock, flags); 2126 2127 err_nomem: 2128 return; 2129 } 2130 2131 static void send_handler(struct ib_mad_agent *agent, 2132 struct ib_mad_send_wc *mad_send_wc) 2133 { 2134 struct ib_sa_query *query = mad_send_wc->send_buf->context[0]; 2135 unsigned long flags; 2136 2137 if (query->callback) 2138 switch (mad_send_wc->status) { 2139 case IB_WC_SUCCESS: 2140 /* No callback -- already got recv */ 2141 break; 2142 case IB_WC_RESP_TIMEOUT_ERR: 2143 query->callback(query, -ETIMEDOUT, NULL); 2144 break; 2145 case IB_WC_WR_FLUSH_ERR: 2146 query->callback(query, -EINTR, NULL); 2147 break; 2148 default: 2149 query->callback(query, -EIO, NULL); 2150 break; 2151 } 2152 2153 xa_lock_irqsave(&queries, flags); 2154 __xa_erase(&queries, query->id); 2155 xa_unlock_irqrestore(&queries, flags); 2156 2157 free_mad(query); 2158 if (query->client) 2159 ib_sa_client_put(query->client); 2160 query->release(query); 2161 } 2162 2163 static void recv_handler(struct ib_mad_agent *mad_agent, 2164 struct ib_mad_send_buf *send_buf, 2165 struct ib_mad_recv_wc *mad_recv_wc) 2166 { 2167 struct ib_sa_query *query; 2168 2169 if (!send_buf) 2170 return; 2171 2172 query = send_buf->context[0]; 2173 if (query->callback) { 2174 if (mad_recv_wc->wc->status == IB_WC_SUCCESS) 2175 query->callback(query, 2176 mad_recv_wc->recv_buf.mad->mad_hdr.status ? 2177 -EINVAL : 0, 2178 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); 2179 else 2180 query->callback(query, -EIO, NULL); 2181 } 2182 2183 ib_free_recv_mad(mad_recv_wc); 2184 } 2185 2186 static void update_sm_ah(struct work_struct *work) 2187 { 2188 struct ib_sa_port *port = 2189 container_of(work, struct ib_sa_port, update_task); 2190 struct ib_sa_sm_ah *new_ah; 2191 struct ib_port_attr port_attr; 2192 struct rdma_ah_attr ah_attr; 2193 bool grh_required; 2194 2195 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) { 2196 pr_warn("Couldn't query port\n"); 2197 return; 2198 } 2199 2200 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL); 2201 if (!new_ah) 2202 return; 2203 2204 kref_init(&new_ah->ref); 2205 new_ah->src_path_mask = (1 << port_attr.lmc) - 1; 2206 2207 new_ah->pkey_index = 0; 2208 if (ib_find_pkey(port->agent->device, port->port_num, 2209 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index)) 2210 pr_err("Couldn't find index for default PKey\n"); 2211 2212 memset(&ah_attr, 0, sizeof(ah_attr)); 2213 ah_attr.type = rdma_ah_find_type(port->agent->device, 2214 port->port_num); 2215 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid); 2216 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl); 2217 rdma_ah_set_port_num(&ah_attr, port->port_num); 2218 2219 grh_required = rdma_is_grh_required(port->agent->device, 2220 port->port_num); 2221 2222 /* 2223 * The OPA sm_lid of 0xFFFF needs special handling so that it can be 2224 * differentiated from a permissive LID of 0xFFFF. We set the 2225 * grh_required flag here so the SA can program the DGID in the 2226 * address handle appropriately 2227 */ 2228 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA && 2229 (grh_required || 2230 port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE))) 2231 rdma_ah_set_make_grd(&ah_attr, true); 2232 2233 if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) { 2234 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH); 2235 rdma_ah_set_subnet_prefix(&ah_attr, 2236 cpu_to_be64(port_attr.subnet_prefix)); 2237 rdma_ah_set_interface_id(&ah_attr, 2238 cpu_to_be64(IB_SA_WELL_KNOWN_GUID)); 2239 } 2240 2241 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr, 2242 RDMA_CREATE_AH_SLEEPABLE); 2243 if (IS_ERR(new_ah->ah)) { 2244 pr_warn("Couldn't create new SM AH\n"); 2245 kfree(new_ah); 2246 return; 2247 } 2248 2249 spin_lock_irq(&port->ah_lock); 2250 if (port->sm_ah) 2251 kref_put(&port->sm_ah->ref, free_sm_ah); 2252 port->sm_ah = new_ah; 2253 spin_unlock_irq(&port->ah_lock); 2254 } 2255 2256 static void ib_sa_event(struct ib_event_handler *handler, 2257 struct ib_event *event) 2258 { 2259 if (event->event == IB_EVENT_PORT_ERR || 2260 event->event == IB_EVENT_PORT_ACTIVE || 2261 event->event == IB_EVENT_LID_CHANGE || 2262 event->event == IB_EVENT_PKEY_CHANGE || 2263 event->event == IB_EVENT_SM_CHANGE || 2264 event->event == IB_EVENT_CLIENT_REREGISTER) { 2265 unsigned long flags; 2266 struct ib_sa_device *sa_dev = 2267 container_of(handler, typeof(*sa_dev), event_handler); 2268 u8 port_num = event->element.port_num - sa_dev->start_port; 2269 struct ib_sa_port *port = &sa_dev->port[port_num]; 2270 2271 if (!rdma_cap_ib_sa(handler->device, port->port_num)) 2272 return; 2273 2274 spin_lock_irqsave(&port->ah_lock, flags); 2275 if (port->sm_ah) 2276 kref_put(&port->sm_ah->ref, free_sm_ah); 2277 port->sm_ah = NULL; 2278 spin_unlock_irqrestore(&port->ah_lock, flags); 2279 2280 if (event->event == IB_EVENT_SM_CHANGE || 2281 event->event == IB_EVENT_CLIENT_REREGISTER || 2282 event->event == IB_EVENT_LID_CHANGE || 2283 event->event == IB_EVENT_PORT_ACTIVE) { 2284 unsigned long delay = 2285 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT); 2286 2287 spin_lock_irqsave(&port->classport_lock, flags); 2288 port->classport_info.valid = false; 2289 port->classport_info.retry_cnt = 0; 2290 spin_unlock_irqrestore(&port->classport_lock, flags); 2291 queue_delayed_work(ib_wq, 2292 &port->ib_cpi_work, delay); 2293 } 2294 queue_work(ib_wq, &sa_dev->port[port_num].update_task); 2295 } 2296 } 2297 2298 static int ib_sa_add_one(struct ib_device *device) 2299 { 2300 struct ib_sa_device *sa_dev; 2301 int s, e, i; 2302 int count = 0; 2303 int ret; 2304 2305 s = rdma_start_port(device); 2306 e = rdma_end_port(device); 2307 2308 sa_dev = kzalloc(struct_size(sa_dev, port, e - s + 1), GFP_KERNEL); 2309 if (!sa_dev) 2310 return -ENOMEM; 2311 2312 sa_dev->start_port = s; 2313 sa_dev->end_port = e; 2314 2315 for (i = 0; i <= e - s; ++i) { 2316 spin_lock_init(&sa_dev->port[i].ah_lock); 2317 if (!rdma_cap_ib_sa(device, i + 1)) 2318 continue; 2319 2320 sa_dev->port[i].sm_ah = NULL; 2321 sa_dev->port[i].port_num = i + s; 2322 2323 spin_lock_init(&sa_dev->port[i].classport_lock); 2324 sa_dev->port[i].classport_info.valid = false; 2325 2326 sa_dev->port[i].agent = 2327 ib_register_mad_agent(device, i + s, IB_QPT_GSI, 2328 NULL, 0, send_handler, 2329 recv_handler, sa_dev, 0); 2330 if (IS_ERR(sa_dev->port[i].agent)) { 2331 ret = PTR_ERR(sa_dev->port[i].agent); 2332 goto err; 2333 } 2334 2335 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah); 2336 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work, 2337 update_ib_cpi); 2338 2339 count++; 2340 } 2341 2342 if (!count) { 2343 ret = -EOPNOTSUPP; 2344 goto free; 2345 } 2346 2347 ib_set_client_data(device, &sa_client, sa_dev); 2348 2349 /* 2350 * We register our event handler after everything is set up, 2351 * and then update our cached info after the event handler is 2352 * registered to avoid any problems if a port changes state 2353 * during our initialization. 2354 */ 2355 2356 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); 2357 ib_register_event_handler(&sa_dev->event_handler); 2358 2359 for (i = 0; i <= e - s; ++i) { 2360 if (rdma_cap_ib_sa(device, i + 1)) 2361 update_sm_ah(&sa_dev->port[i].update_task); 2362 } 2363 2364 return 0; 2365 2366 err: 2367 while (--i >= 0) { 2368 if (rdma_cap_ib_sa(device, i + 1)) 2369 ib_unregister_mad_agent(sa_dev->port[i].agent); 2370 } 2371 free: 2372 kfree(sa_dev); 2373 return ret; 2374 } 2375 2376 static void ib_sa_remove_one(struct ib_device *device, void *client_data) 2377 { 2378 struct ib_sa_device *sa_dev = client_data; 2379 int i; 2380 2381 ib_unregister_event_handler(&sa_dev->event_handler); 2382 flush_workqueue(ib_wq); 2383 2384 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { 2385 if (rdma_cap_ib_sa(device, i + 1)) { 2386 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work); 2387 ib_unregister_mad_agent(sa_dev->port[i].agent); 2388 if (sa_dev->port[i].sm_ah) 2389 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); 2390 } 2391 2392 } 2393 2394 kfree(sa_dev); 2395 } 2396 2397 int ib_sa_init(void) 2398 { 2399 int ret; 2400 2401 get_random_bytes(&tid, sizeof tid); 2402 2403 atomic_set(&ib_nl_sa_request_seq, 0); 2404 2405 ret = ib_register_client(&sa_client); 2406 if (ret) { 2407 pr_err("Couldn't register ib_sa client\n"); 2408 goto err1; 2409 } 2410 2411 ret = mcast_init(); 2412 if (ret) { 2413 pr_err("Couldn't initialize multicast handling\n"); 2414 goto err2; 2415 } 2416 2417 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM); 2418 if (!ib_nl_wq) { 2419 ret = -ENOMEM; 2420 goto err3; 2421 } 2422 2423 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout); 2424 2425 return 0; 2426 2427 err3: 2428 mcast_cleanup(); 2429 err2: 2430 ib_unregister_client(&sa_client); 2431 err1: 2432 return ret; 2433 } 2434 2435 void ib_sa_cleanup(void) 2436 { 2437 cancel_delayed_work(&ib_nl_timed_work); 2438 flush_workqueue(ib_nl_wq); 2439 destroy_workqueue(ib_nl_wq); 2440 mcast_cleanup(); 2441 ib_unregister_client(&sa_client); 2442 WARN_ON(!xa_empty(&queries)); 2443 } 2444