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