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