1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. 5 * Copyright (c) 2004 Topspin Corporation. All rights reserved. 6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved. 7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 8 * 9 * This software is available to you under a choice of one of two 10 * licenses. You may choose to be licensed under the terms of the GNU 11 * General Public License (GPL) Version 2, available from the file 12 * COPYING in the main directory of this source tree, or the 13 * OpenIB.org BSD license below: 14 * 15 * Redistribution and use in source and binary forms, with or 16 * without modification, are permitted provided that the following 17 * conditions are met: 18 * 19 * - Redistributions of source code must retain the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer. 22 * 23 * - Redistributions in binary form must reproduce the above 24 * copyright notice, this list of conditions and the following 25 * disclaimer in the documentation and/or other materials 26 * provided with the distribution. 27 * 28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 29 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 31 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 32 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 33 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 34 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 35 * SOFTWARE. 36 * 37 * $FreeBSD$ 38 */ 39 40 #if !defined(IB_CM_H) 41 #define IB_CM_H 42 43 #include <rdma/ib_mad.h> 44 #include <rdma/ib_sa.h> 45 46 /* ib_cm and ib_user_cm modules share /sys/class/infiniband_cm */ 47 extern struct class cm_class; 48 49 enum ib_cm_state { 50 IB_CM_IDLE, 51 IB_CM_LISTEN, 52 IB_CM_REQ_SENT, 53 IB_CM_REQ_RCVD, 54 IB_CM_MRA_REQ_SENT, 55 IB_CM_MRA_REQ_RCVD, 56 IB_CM_REP_SENT, 57 IB_CM_REP_RCVD, 58 IB_CM_MRA_REP_SENT, 59 IB_CM_MRA_REP_RCVD, 60 IB_CM_ESTABLISHED, 61 IB_CM_DREQ_SENT, 62 IB_CM_DREQ_RCVD, 63 IB_CM_TIMEWAIT, 64 IB_CM_SIDR_REQ_SENT, 65 IB_CM_SIDR_REQ_RCVD 66 }; 67 68 enum ib_cm_lap_state { 69 IB_CM_LAP_UNINIT, 70 IB_CM_LAP_IDLE, 71 IB_CM_LAP_SENT, 72 IB_CM_LAP_RCVD, 73 IB_CM_MRA_LAP_SENT, 74 IB_CM_MRA_LAP_RCVD, 75 }; 76 77 enum ib_cm_event_type { 78 IB_CM_REQ_ERROR, 79 IB_CM_REQ_RECEIVED, 80 IB_CM_REP_ERROR, 81 IB_CM_REP_RECEIVED, 82 IB_CM_RTU_RECEIVED, 83 IB_CM_USER_ESTABLISHED, 84 IB_CM_DREQ_ERROR, 85 IB_CM_DREQ_RECEIVED, 86 IB_CM_DREP_RECEIVED, 87 IB_CM_TIMEWAIT_EXIT, 88 IB_CM_MRA_RECEIVED, 89 IB_CM_REJ_RECEIVED, 90 IB_CM_LAP_ERROR, 91 IB_CM_LAP_RECEIVED, 92 IB_CM_APR_RECEIVED, 93 IB_CM_SIDR_REQ_ERROR, 94 IB_CM_SIDR_REQ_RECEIVED, 95 IB_CM_SIDR_REP_RECEIVED 96 }; 97 98 enum ib_cm_data_size { 99 IB_CM_REQ_PRIVATE_DATA_SIZE = 92, 100 IB_CM_MRA_PRIVATE_DATA_SIZE = 222, 101 IB_CM_REJ_PRIVATE_DATA_SIZE = 148, 102 IB_CM_REP_PRIVATE_DATA_SIZE = 196, 103 IB_CM_RTU_PRIVATE_DATA_SIZE = 224, 104 IB_CM_DREQ_PRIVATE_DATA_SIZE = 220, 105 IB_CM_DREP_PRIVATE_DATA_SIZE = 224, 106 IB_CM_REJ_ARI_LENGTH = 72, 107 IB_CM_LAP_PRIVATE_DATA_SIZE = 168, 108 IB_CM_APR_PRIVATE_DATA_SIZE = 148, 109 IB_CM_APR_INFO_LENGTH = 72, 110 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE = 216, 111 IB_CM_SIDR_REP_PRIVATE_DATA_SIZE = 136, 112 IB_CM_SIDR_REP_INFO_LENGTH = 72, 113 }; 114 115 struct ib_cm_id; 116 117 struct ib_cm_req_event_param { 118 struct ib_cm_id *listen_id; 119 120 /* P_Key that was used by the GMP's BTH header */ 121 u16 bth_pkey; 122 123 u8 port; 124 125 struct ib_sa_path_rec *primary_path; 126 struct ib_sa_path_rec *alternate_path; 127 128 /* 129 * SGID index of the primary path. Currently only 130 * useful for RoCE. Alternate path GID attributes 131 * are not yet supported. 132 */ 133 u8 ppath_sgid_index; 134 135 __be64 remote_ca_guid; 136 u32 remote_qkey; 137 u32 remote_qpn; 138 enum ib_qp_type qp_type; 139 140 u32 starting_psn; 141 u8 responder_resources; 142 u8 initiator_depth; 143 unsigned int local_cm_response_timeout:5; 144 unsigned int flow_control:1; 145 unsigned int remote_cm_response_timeout:5; 146 unsigned int retry_count:3; 147 unsigned int rnr_retry_count:3; 148 unsigned int srq:1; 149 }; 150 151 struct ib_cm_rep_event_param { 152 __be64 remote_ca_guid; 153 u32 remote_qkey; 154 u32 remote_qpn; 155 u32 starting_psn; 156 u8 responder_resources; 157 u8 initiator_depth; 158 unsigned int target_ack_delay:5; 159 unsigned int failover_accepted:2; 160 unsigned int flow_control:1; 161 unsigned int rnr_retry_count:3; 162 unsigned int srq:1; 163 }; 164 165 enum ib_cm_rej_reason { 166 IB_CM_REJ_NO_QP = 1, 167 IB_CM_REJ_NO_EEC = 2, 168 IB_CM_REJ_NO_RESOURCES = 3, 169 IB_CM_REJ_TIMEOUT = 4, 170 IB_CM_REJ_UNSUPPORTED = 5, 171 IB_CM_REJ_INVALID_COMM_ID = 6, 172 IB_CM_REJ_INVALID_COMM_INSTANCE = 7, 173 IB_CM_REJ_INVALID_SERVICE_ID = 8, 174 IB_CM_REJ_INVALID_TRANSPORT_TYPE = 9, 175 IB_CM_REJ_STALE_CONN = 10, 176 IB_CM_REJ_RDC_NOT_EXIST = 11, 177 IB_CM_REJ_INVALID_GID = 12, 178 IB_CM_REJ_INVALID_LID = 13, 179 IB_CM_REJ_INVALID_SL = 14, 180 IB_CM_REJ_INVALID_TRAFFIC_CLASS = 15, 181 IB_CM_REJ_INVALID_HOP_LIMIT = 16, 182 IB_CM_REJ_INVALID_PACKET_RATE = 17, 183 IB_CM_REJ_INVALID_ALT_GID = 18, 184 IB_CM_REJ_INVALID_ALT_LID = 19, 185 IB_CM_REJ_INVALID_ALT_SL = 20, 186 IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS = 21, 187 IB_CM_REJ_INVALID_ALT_HOP_LIMIT = 22, 188 IB_CM_REJ_INVALID_ALT_PACKET_RATE = 23, 189 IB_CM_REJ_PORT_CM_REDIRECT = 24, 190 IB_CM_REJ_PORT_REDIRECT = 25, 191 IB_CM_REJ_INVALID_MTU = 26, 192 IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES = 27, 193 IB_CM_REJ_CONSUMER_DEFINED = 28, 194 IB_CM_REJ_INVALID_RNR_RETRY = 29, 195 IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID = 30, 196 IB_CM_REJ_INVALID_CLASS_VERSION = 31, 197 IB_CM_REJ_INVALID_FLOW_LABEL = 32, 198 IB_CM_REJ_INVALID_ALT_FLOW_LABEL = 33 199 }; 200 201 struct ib_cm_rej_event_param { 202 enum ib_cm_rej_reason reason; 203 void *ari; 204 u8 ari_length; 205 }; 206 207 struct ib_cm_mra_event_param { 208 u8 service_timeout; 209 }; 210 211 struct ib_cm_lap_event_param { 212 struct ib_sa_path_rec *alternate_path; 213 }; 214 215 enum ib_cm_apr_status { 216 IB_CM_APR_SUCCESS, 217 IB_CM_APR_INVALID_COMM_ID, 218 IB_CM_APR_UNSUPPORTED, 219 IB_CM_APR_REJECT, 220 IB_CM_APR_REDIRECT, 221 IB_CM_APR_IS_CURRENT, 222 IB_CM_APR_INVALID_QPN_EECN, 223 IB_CM_APR_INVALID_LID, 224 IB_CM_APR_INVALID_GID, 225 IB_CM_APR_INVALID_FLOW_LABEL, 226 IB_CM_APR_INVALID_TCLASS, 227 IB_CM_APR_INVALID_HOP_LIMIT, 228 IB_CM_APR_INVALID_PACKET_RATE, 229 IB_CM_APR_INVALID_SL 230 }; 231 232 struct ib_cm_apr_event_param { 233 enum ib_cm_apr_status ap_status; 234 void *apr_info; 235 u8 info_len; 236 }; 237 238 struct ib_cm_sidr_req_event_param { 239 struct ib_cm_id *listen_id; 240 __be64 service_id; 241 242 /* 243 * SGID index of the request. Currently only 244 * useful for RoCE. 245 */ 246 u8 sgid_index; 247 248 /* P_Key that was used by the GMP's BTH header */ 249 u16 bth_pkey; 250 u8 port; 251 u16 pkey; 252 }; 253 254 enum ib_cm_sidr_status { 255 IB_SIDR_SUCCESS, 256 IB_SIDR_UNSUPPORTED, 257 IB_SIDR_REJECT, 258 IB_SIDR_NO_QP, 259 IB_SIDR_REDIRECT, 260 IB_SIDR_UNSUPPORTED_VERSION 261 }; 262 263 struct ib_cm_sidr_rep_event_param { 264 enum ib_cm_sidr_status status; 265 u32 qkey; 266 u32 qpn; 267 void *info; 268 u8 info_len; 269 }; 270 271 struct ib_cm_event { 272 enum ib_cm_event_type event; 273 union { 274 struct ib_cm_req_event_param req_rcvd; 275 struct ib_cm_rep_event_param rep_rcvd; 276 /* No data for RTU received events. */ 277 struct ib_cm_rej_event_param rej_rcvd; 278 struct ib_cm_mra_event_param mra_rcvd; 279 struct ib_cm_lap_event_param lap_rcvd; 280 struct ib_cm_apr_event_param apr_rcvd; 281 /* No data for DREQ/DREP received events. */ 282 struct ib_cm_sidr_req_event_param sidr_req_rcvd; 283 struct ib_cm_sidr_rep_event_param sidr_rep_rcvd; 284 enum ib_wc_status send_status; 285 } param; 286 287 void *private_data; 288 }; 289 290 #define CM_REQ_ATTR_ID cpu_to_be16(0x0010) 291 #define CM_MRA_ATTR_ID cpu_to_be16(0x0011) 292 #define CM_REJ_ATTR_ID cpu_to_be16(0x0012) 293 #define CM_REP_ATTR_ID cpu_to_be16(0x0013) 294 #define CM_RTU_ATTR_ID cpu_to_be16(0x0014) 295 #define CM_DREQ_ATTR_ID cpu_to_be16(0x0015) 296 #define CM_DREP_ATTR_ID cpu_to_be16(0x0016) 297 #define CM_SIDR_REQ_ATTR_ID cpu_to_be16(0x0017) 298 #define CM_SIDR_REP_ATTR_ID cpu_to_be16(0x0018) 299 #define CM_LAP_ATTR_ID cpu_to_be16(0x0019) 300 #define CM_APR_ATTR_ID cpu_to_be16(0x001A) 301 302 /** 303 * ib_cm_handler - User-defined callback to process communication events. 304 * @cm_id: Communication identifier associated with the reported event. 305 * @event: Information about the communication event. 306 * 307 * IB_CM_REQ_RECEIVED and IB_CM_SIDR_REQ_RECEIVED communication events 308 * generated as a result of listen requests result in the allocation of a 309 * new @cm_id. The new @cm_id is returned to the user through this callback. 310 * Clients are responsible for destroying the new @cm_id. For peer-to-peer 311 * IB_CM_REQ_RECEIVED and all other events, the returned @cm_id corresponds 312 * to a user's existing communication identifier. 313 * 314 * Users may not call ib_destroy_cm_id while in the context of this callback; 315 * however, returning a non-zero value instructs the communication manager to 316 * destroy the @cm_id after the callback completes. 317 */ 318 typedef int (*ib_cm_handler)(struct ib_cm_id *cm_id, 319 struct ib_cm_event *event); 320 321 struct ib_cm_id { 322 ib_cm_handler cm_handler; 323 void *context; 324 struct ib_device *device; 325 __be64 service_id; 326 __be64 service_mask; 327 enum ib_cm_state state; /* internal CM/debug use */ 328 enum ib_cm_lap_state lap_state; /* internal CM/debug use */ 329 __be32 local_id; 330 __be32 remote_id; 331 u32 remote_cm_qpn; /* 1 unless redirected */ 332 }; 333 334 /** 335 * ib_create_cm_id - Allocate a communication identifier. 336 * @device: Device associated with the cm_id. All related communication will 337 * be associated with the specified device. 338 * @cm_handler: Callback invoked to notify the user of CM events. 339 * @context: User specified context associated with the communication 340 * identifier. 341 * 342 * Communication identifiers are used to track connection states, service 343 * ID resolution requests, and listen requests. 344 */ 345 struct ib_cm_id *ib_create_cm_id(struct ib_device *device, 346 ib_cm_handler cm_handler, 347 void *context); 348 349 /** 350 * ib_destroy_cm_id - Destroy a connection identifier. 351 * @cm_id: Connection identifier to destroy. 352 * 353 * This call blocks until the connection identifier is destroyed. 354 */ 355 void ib_destroy_cm_id(struct ib_cm_id *cm_id); 356 357 #define IB_SERVICE_ID_AGN_MASK cpu_to_be64(0xFF00000000000000ULL) 358 #define IB_CM_ASSIGN_SERVICE_ID cpu_to_be64(0x0200000000000000ULL) 359 #define IB_CMA_SERVICE_ID cpu_to_be64(0x0000000001000000ULL) 360 #define IB_CMA_SERVICE_ID_MASK cpu_to_be64(0xFFFFFFFFFF000000ULL) 361 #define IB_SDP_SERVICE_ID cpu_to_be64(0x0000000000010000ULL) 362 #define IB_SDP_SERVICE_ID_MASK cpu_to_be64(0xFFFFFFFFFFFF0000ULL) 363 364 /** 365 * ib_cm_listen - Initiates listening on the specified service ID for 366 * connection and service ID resolution requests. 367 * @cm_id: Connection identifier associated with the listen request. 368 * @service_id: Service identifier matched against incoming connection 369 * and service ID resolution requests. The service ID should be specified 370 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will 371 * assign a service ID to the caller. 372 * @service_mask: Mask applied to service ID used to listen across a 373 * range of service IDs. If set to 0, the service ID is matched 374 * exactly. This parameter is ignored if %service_id is set to 375 * IB_CM_ASSIGN_SERVICE_ID. 376 */ 377 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, 378 __be64 service_mask); 379 380 struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device, 381 ib_cm_handler cm_handler, 382 __be64 service_id); 383 384 struct ib_cm_req_param { 385 struct ib_sa_path_rec *primary_path; 386 struct ib_sa_path_rec *alternate_path; 387 __be64 service_id; 388 u32 qp_num; 389 enum ib_qp_type qp_type; 390 u32 starting_psn; 391 const void *private_data; 392 u8 private_data_len; 393 u8 peer_to_peer; 394 u8 responder_resources; 395 u8 initiator_depth; 396 u8 remote_cm_response_timeout; 397 u8 flow_control; 398 u8 local_cm_response_timeout; 399 u8 retry_count; 400 u8 rnr_retry_count; 401 u8 max_cm_retries; 402 u8 srq; 403 }; 404 405 /** 406 * ib_send_cm_req - Sends a connection request to the remote node. 407 * @cm_id: Connection identifier that will be associated with the 408 * connection request. 409 * @param: Connection request information needed to establish the 410 * connection. 411 */ 412 int ib_send_cm_req(struct ib_cm_id *cm_id, 413 struct ib_cm_req_param *param); 414 415 struct ib_cm_rep_param { 416 u32 qp_num; 417 u32 starting_psn; 418 const void *private_data; 419 u8 private_data_len; 420 u8 responder_resources; 421 u8 initiator_depth; 422 u8 failover_accepted; 423 u8 flow_control; 424 u8 rnr_retry_count; 425 u8 srq; 426 }; 427 428 /** 429 * ib_send_cm_rep - Sends a connection reply in response to a connection 430 * request. 431 * @cm_id: Connection identifier that will be associated with the 432 * connection request. 433 * @param: Connection reply information needed to establish the 434 * connection. 435 */ 436 int ib_send_cm_rep(struct ib_cm_id *cm_id, 437 struct ib_cm_rep_param *param); 438 439 /** 440 * ib_send_cm_rtu - Sends a connection ready to use message in response 441 * to a connection reply message. 442 * @cm_id: Connection identifier associated with the connection request. 443 * @private_data: Optional user-defined private data sent with the 444 * ready to use message. 445 * @private_data_len: Size of the private data buffer, in bytes. 446 */ 447 int ib_send_cm_rtu(struct ib_cm_id *cm_id, 448 const void *private_data, 449 u8 private_data_len); 450 451 /** 452 * ib_send_cm_dreq - Sends a disconnection request for an existing 453 * connection. 454 * @cm_id: Connection identifier associated with the connection being 455 * released. 456 * @private_data: Optional user-defined private data sent with the 457 * disconnection request message. 458 * @private_data_len: Size of the private data buffer, in bytes. 459 */ 460 int ib_send_cm_dreq(struct ib_cm_id *cm_id, 461 const void *private_data, 462 u8 private_data_len); 463 464 /** 465 * ib_send_cm_drep - Sends a disconnection reply to a disconnection request. 466 * @cm_id: Connection identifier associated with the connection being 467 * released. 468 * @private_data: Optional user-defined private data sent with the 469 * disconnection reply message. 470 * @private_data_len: Size of the private data buffer, in bytes. 471 * 472 * If the cm_id is in the correct state, the CM will transition the connection 473 * to the timewait state, even if an error occurs sending the DREP message. 474 */ 475 int ib_send_cm_drep(struct ib_cm_id *cm_id, 476 const void *private_data, 477 u8 private_data_len); 478 479 /** 480 * ib_cm_notify - Notifies the CM of an event reported to the consumer. 481 * @cm_id: Connection identifier to transition to established. 482 * @event: Type of event. 483 * 484 * This routine should be invoked by users to notify the CM of relevant 485 * communication events. Events that should be reported to the CM and 486 * when to report them are: 487 * 488 * IB_EVENT_COMM_EST - Used when a message is received on a connected 489 * QP before an RTU has been received. 490 * IB_EVENT_PATH_MIG - Notifies the CM that the connection has failed over 491 * to the alternate path. 492 */ 493 int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event); 494 495 /** 496 * ib_send_cm_rej - Sends a connection rejection message to the 497 * remote node. 498 * @cm_id: Connection identifier associated with the connection being 499 * rejected. 500 * @reason: Reason for the connection request rejection. 501 * @ari: Optional additional rejection information. 502 * @ari_length: Size of the additional rejection information, in bytes. 503 * @private_data: Optional user-defined private data sent with the 504 * rejection message. 505 * @private_data_len: Size of the private data buffer, in bytes. 506 */ 507 int ib_send_cm_rej(struct ib_cm_id *cm_id, 508 enum ib_cm_rej_reason reason, 509 void *ari, 510 u8 ari_length, 511 const void *private_data, 512 u8 private_data_len); 513 514 #define IB_CM_MRA_FLAG_DELAY 0x80 /* Send MRA only after a duplicate msg */ 515 516 /** 517 * ib_send_cm_mra - Sends a message receipt acknowledgement to a connection 518 * message. 519 * @cm_id: Connection identifier associated with the connection message. 520 * @service_timeout: The lower 5-bits specify the maximum time required for 521 * the sender to reply to the connection message. The upper 3-bits 522 * specify additional control flags. 523 * @private_data: Optional user-defined private data sent with the 524 * message receipt acknowledgement. 525 * @private_data_len: Size of the private data buffer, in bytes. 526 */ 527 int ib_send_cm_mra(struct ib_cm_id *cm_id, 528 u8 service_timeout, 529 const void *private_data, 530 u8 private_data_len); 531 532 /** 533 * ib_send_cm_lap - Sends a load alternate path request. 534 * @cm_id: Connection identifier associated with the load alternate path 535 * message. 536 * @alternate_path: A path record that identifies the alternate path to 537 * load. 538 * @private_data: Optional user-defined private data sent with the 539 * load alternate path message. 540 * @private_data_len: Size of the private data buffer, in bytes. 541 */ 542 int ib_send_cm_lap(struct ib_cm_id *cm_id, 543 struct ib_sa_path_rec *alternate_path, 544 const void *private_data, 545 u8 private_data_len); 546 547 /** 548 * ib_cm_init_qp_attr - Initializes the QP attributes for use in transitioning 549 * to a specified QP state. 550 * @cm_id: Communication identifier associated with the QP attributes to 551 * initialize. 552 * @qp_attr: On input, specifies the desired QP state. On output, the 553 * mandatory and desired optional attributes will be set in order to 554 * modify the QP to the specified state. 555 * @qp_attr_mask: The QP attribute mask that may be used to transition the 556 * QP to the specified state. 557 * 558 * Users must set the @qp_attr->qp_state to the desired QP state. This call 559 * will set all required attributes for the given transition, along with 560 * known optional attributes. Users may override the attributes returned from 561 * this call before calling ib_modify_qp. 562 */ 563 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, 564 struct ib_qp_attr *qp_attr, 565 int *qp_attr_mask); 566 567 /** 568 * ib_send_cm_apr - Sends an alternate path response message in response to 569 * a load alternate path request. 570 * @cm_id: Connection identifier associated with the alternate path response. 571 * @status: Reply status sent with the alternate path response. 572 * @info: Optional additional information sent with the alternate path 573 * response. 574 * @info_length: Size of the additional information, in bytes. 575 * @private_data: Optional user-defined private data sent with the 576 * alternate path response message. 577 * @private_data_len: Size of the private data buffer, in bytes. 578 */ 579 int ib_send_cm_apr(struct ib_cm_id *cm_id, 580 enum ib_cm_apr_status status, 581 void *info, 582 u8 info_length, 583 const void *private_data, 584 u8 private_data_len); 585 586 struct ib_cm_sidr_req_param { 587 struct ib_sa_path_rec *path; 588 __be64 service_id; 589 int timeout_ms; 590 const void *private_data; 591 u8 private_data_len; 592 u8 max_cm_retries; 593 }; 594 595 /** 596 * ib_send_cm_sidr_req - Sends a service ID resolution request to the 597 * remote node. 598 * @cm_id: Communication identifier that will be associated with the 599 * service ID resolution request. 600 * @param: Service ID resolution request information. 601 */ 602 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, 603 struct ib_cm_sidr_req_param *param); 604 605 struct ib_cm_sidr_rep_param { 606 u32 qp_num; 607 u32 qkey; 608 enum ib_cm_sidr_status status; 609 const void *info; 610 u8 info_length; 611 const void *private_data; 612 u8 private_data_len; 613 }; 614 615 /** 616 * ib_send_cm_sidr_rep - Sends a service ID resolution reply to the 617 * remote node. 618 * @cm_id: Communication identifier associated with the received service ID 619 * resolution request. 620 * @param: Service ID resolution reply information. 621 */ 622 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, 623 struct ib_cm_sidr_rep_param *param); 624 625 /** 626 * ibcm_reject_msg - return a pointer to a reject message string. 627 * @reason: Value returned in the REJECT event status field. 628 */ 629 const char *__attribute_const__ ibcm_reject_msg(int reason); 630 631 #endif /* IB_CM_H */ 632