drivers/infiniband/include/ib_cm.h

   1 /*
   2  * Copyright (c) 2004 Intel Corporation.  All rights reserved.
   3  * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
   4  * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
   5  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  *
  35  * $Id: ib_cm.h 2730 2005-06-28 16:43:03Z sean.hefty $
  36  */
  37 #if !defined(IB_CM_H)
  38 #define IB_CM_H
  39
  40 #include <ib_mad.h>
  41 #include <ib_sa.h>
  42
  43 enum ib_cm_state {
  44         IB_CM_IDLE,
  45         IB_CM_LISTEN,
  46         IB_CM_REQ_SENT,
  47         IB_CM_REQ_RCVD,
  48         IB_CM_MRA_REQ_SENT,
  49         IB_CM_MRA_REQ_RCVD,
  50         IB_CM_REP_SENT,
  51         IB_CM_REP_RCVD,
  52         IB_CM_MRA_REP_SENT,
  53         IB_CM_MRA_REP_RCVD,
  54         IB_CM_ESTABLISHED,
  55         IB_CM_DREQ_SENT,
  56         IB_CM_DREQ_RCVD,
  57         IB_CM_TIMEWAIT,
  58         IB_CM_SIDR_REQ_SENT,
  59         IB_CM_SIDR_REQ_RCVD
  60 };
  61
  62 enum ib_cm_lap_state {
  63         IB_CM_LAP_IDLE,
  64         IB_CM_LAP_SENT,
  65         IB_CM_LAP_RCVD,
  66         IB_CM_MRA_LAP_SENT,
  67         IB_CM_MRA_LAP_RCVD,
  68 };
  69
  70 enum ib_cm_event_type {
  71         IB_CM_REQ_ERROR,
  72         IB_CM_REQ_RECEIVED,
  73         IB_CM_REP_ERROR,
  74         IB_CM_REP_RECEIVED,
  75         IB_CM_RTU_RECEIVED,
  76         IB_CM_USER_ESTABLISHED,
  77         IB_CM_DREQ_ERROR,
  78         IB_CM_DREQ_RECEIVED,
  79         IB_CM_DREP_RECEIVED,
  80         IB_CM_TIMEWAIT_EXIT,
  81         IB_CM_MRA_RECEIVED,
  82         IB_CM_REJ_RECEIVED,
  83         IB_CM_LAP_ERROR,
  84         IB_CM_LAP_RECEIVED,
  85         IB_CM_APR_RECEIVED,
  86         IB_CM_SIDR_REQ_ERROR,
  87         IB_CM_SIDR_REQ_RECEIVED,
  88         IB_CM_SIDR_REP_RECEIVED
  89 };
  90
  91 enum ib_cm_data_size {
  92         IB_CM_REQ_PRIVATE_DATA_SIZE      = 92,
  93         IB_CM_MRA_PRIVATE_DATA_SIZE      = 222,
  94         IB_CM_REJ_PRIVATE_DATA_SIZE      = 148,
  95         IB_CM_REP_PRIVATE_DATA_SIZE      = 196,
  96         IB_CM_RTU_PRIVATE_DATA_SIZE      = 224,
  97         IB_CM_DREQ_PRIVATE_DATA_SIZE     = 220,
  98         IB_CM_DREP_PRIVATE_DATA_SIZE     = 224,
  99         IB_CM_REJ_ARI_LENGTH             = 72,
 100         IB_CM_LAP_PRIVATE_DATA_SIZE      = 168,
 101         IB_CM_APR_PRIVATE_DATA_SIZE      = 148,
 102         IB_CM_APR_INFO_LENGTH            = 72,
 103         IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE = 216,
 104         IB_CM_SIDR_REP_PRIVATE_DATA_SIZE = 136,
 105         IB_CM_SIDR_REP_INFO_LENGTH       = 72
 106 };
 107
 108 struct ib_cm_id;
 109
 110 struct ib_cm_req_event_param {
 111         struct ib_cm_id         *listen_id;
 112         struct ib_device        *device;
 113         u8                      port;
 114
 115         struct ib_sa_path_rec   *primary_path;
 116         struct ib_sa_path_rec   *alternate_path;
 117
 118         u64                     remote_ca_guid;
 119         u32                     remote_qkey;
 120         u32                     remote_qpn;
 121         enum ib_qp_type         qp_type;
 122
 123         u32                     starting_psn;
 124         u8                      responder_resources;
 125         u8                      initiator_depth;
 126         unsigned int            local_cm_response_timeout:5;
 127         unsigned int            flow_control:1;
 128         unsigned int            remote_cm_response_timeout:5;
 129         unsigned int            retry_count:3;
 130         unsigned int            rnr_retry_count:3;
 131         unsigned int            srq:1;
 132 };
 133
 134 struct ib_cm_rep_event_param {
 135         u64                     remote_ca_guid;
 136         u32                     remote_qkey;
 137         u32                     remote_qpn;
 138         u32                     starting_psn;
 139         u8                      responder_resources;
 140         u8                      initiator_depth;
 141         unsigned int            target_ack_delay:5;
 142         unsigned int            failover_accepted:2;
 143         unsigned int            flow_control:1;
 144         unsigned int            rnr_retry_count:3;
 145         unsigned int            srq:1;
 146 };
 147
 148 enum ib_cm_rej_reason {
 149         IB_CM_REJ_NO_QP                         = __constant_htons(1),
 150         IB_CM_REJ_NO_EEC                        = __constant_htons(2),
 151         IB_CM_REJ_NO_RESOURCES                  = __constant_htons(3),
 152         IB_CM_REJ_TIMEOUT                       = __constant_htons(4),
 153         IB_CM_REJ_UNSUPPORTED                   = __constant_htons(5),
 154         IB_CM_REJ_INVALID_COMM_ID               = __constant_htons(6),
 155         IB_CM_REJ_INVALID_COMM_INSTANCE         = __constant_htons(7),
 156         IB_CM_REJ_INVALID_SERVICE_ID            = __constant_htons(8),
 157         IB_CM_REJ_INVALID_TRANSPORT_TYPE        = __constant_htons(9),
 158         IB_CM_REJ_STALE_CONN                    = __constant_htons(10),
 159         IB_CM_REJ_RDC_NOT_EXIST                 = __constant_htons(11),
 160         IB_CM_REJ_INVALID_GID                   = __constant_htons(12),
 161         IB_CM_REJ_INVALID_LID                   = __constant_htons(13),
 162         IB_CM_REJ_INVALID_SL                    = __constant_htons(14),
 163         IB_CM_REJ_INVALID_TRAFFIC_CLASS         = __constant_htons(15),
 164         IB_CM_REJ_INVALID_HOP_LIMIT             = __constant_htons(16),
 165         IB_CM_REJ_INVALID_PACKET_RATE           = __constant_htons(17),
 166         IB_CM_REJ_INVALID_ALT_GID               = __constant_htons(18),
 167         IB_CM_REJ_INVALID_ALT_LID               = __constant_htons(19),
 168         IB_CM_REJ_INVALID_ALT_SL                = __constant_htons(20),
 169         IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS     = __constant_htons(21),
 170         IB_CM_REJ_INVALID_ALT_HOP_LIMIT         = __constant_htons(22),
 171         IB_CM_REJ_INVALID_ALT_PACKET_RATE       = __constant_htons(23),
 172         IB_CM_REJ_PORT_CM_REDIRECT              = __constant_htons(24),
 173         IB_CM_REJ_PORT_REDIRECT                 = __constant_htons(25),
 174         IB_CM_REJ_INVALID_MTU                   = __constant_htons(26),
 175         IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES   = __constant_htons(27),
 176         IB_CM_REJ_CONSUMER_DEFINED              = __constant_htons(28),
 177         IB_CM_REJ_INVALID_RNR_RETRY             = __constant_htons(29),
 178         IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID       = __constant_htons(30),
 179         IB_CM_REJ_INVALID_CLASS_VERSION         = __constant_htons(31),
 180         IB_CM_REJ_INVALID_FLOW_LABEL            = __constant_htons(32),
 181         IB_CM_REJ_INVALID_ALT_FLOW_LABEL        = __constant_htons(33)
 182 };
 183
 184 struct ib_cm_rej_event_param {
 185         enum ib_cm_rej_reason   reason;
 186         void                    *ari;
 187         u8                      ari_length;
 188 };
 189
 190 struct ib_cm_mra_event_param {
 191         u8      service_timeout;
 192 };
 193
 194 struct ib_cm_lap_event_param {
 195         struct ib_sa_path_rec   *alternate_path;
 196 };
 197
 198 enum ib_cm_apr_status {
 199         IB_CM_APR_SUCCESS,
 200         IB_CM_APR_INVALID_COMM_ID,
 201         IB_CM_APR_UNSUPPORTED,
 202         IB_CM_APR_REJECT,
 203         IB_CM_APR_REDIRECT,
 204         IB_CM_APR_IS_CURRENT,
 205         IB_CM_APR_INVALID_QPN_EECN,
 206         IB_CM_APR_INVALID_LID,
 207         IB_CM_APR_INVALID_GID,
 208         IB_CM_APR_INVALID_FLOW_LABEL,
 209         IB_CM_APR_INVALID_TCLASS,
 210         IB_CM_APR_INVALID_HOP_LIMIT,
 211         IB_CM_APR_INVALID_PACKET_RATE,
 212         IB_CM_APR_INVALID_SL
 213 };
 214
 215 struct ib_cm_apr_event_param {
 216         enum ib_cm_apr_status   ap_status;
 217         void                    *apr_info;
 218         u8                      info_len;
 219 };
 220
 221 struct ib_cm_sidr_req_event_param {
 222         struct ib_cm_id         *listen_id;
 223         struct ib_device        *device;
 224         u8                      port;
 225
 226         u16     pkey;
 227 };
 228
 229 enum ib_cm_sidr_status {
 230         IB_SIDR_SUCCESS,
 231         IB_SIDR_UNSUPPORTED,
 232         IB_SIDR_REJECT,
 233         IB_SIDR_NO_QP,
 234         IB_SIDR_REDIRECT,
 235         IB_SIDR_UNSUPPORTED_VERSION
 236 };
 237
 238 struct ib_cm_sidr_rep_event_param {
 239         enum ib_cm_sidr_status  status;
 240         u32                     qkey;
 241         u32                     qpn;
 242         void                    *info;
 243         u8                      info_len;
 244
 245 };
 246
 247 struct ib_cm_event {
 248         enum ib_cm_event_type   event;
 249         union {
 250                 struct ib_cm_req_event_param    req_rcvd;
 251                 struct ib_cm_rep_event_param    rep_rcvd;
 252                 /* No data for RTU received events. */
 253                 struct ib_cm_rej_event_param    rej_rcvd;
 254                 struct ib_cm_mra_event_param    mra_rcvd;
 255                 struct ib_cm_lap_event_param    lap_rcvd;
 256                 struct ib_cm_apr_event_param    apr_rcvd;
 257                 /* No data for DREQ/DREP received events. */
 258                 struct ib_cm_sidr_req_event_param sidr_req_rcvd;
 259                 struct ib_cm_sidr_rep_event_param sidr_rep_rcvd;
 260                 enum ib_wc_status               send_status;
 261         } param;
 262
 263         void                    *private_data;
 264 };
 265
 266 /**
 267  * ib_cm_handler - User-defined callback to process communication events.
 268  * @cm_id: Communication identifier associated with the reported event.
 269  * @event: Information about the communication event.
 270  *
 271  * IB_CM_REQ_RECEIVED and IB_CM_SIDR_REQ_RECEIVED communication events
 272  * generated as a result of listen requests result in the allocation of a
 273  * new @cm_id.  The new @cm_id is returned to the user through this callback.
 274  * Clients are responsible for destroying the new @cm_id.  For peer-to-peer
 275  * IB_CM_REQ_RECEIVED and all other events, the returned @cm_id corresponds
 276  * to a user's existing communication identifier.
 277  *
 278  * Users may not call ib_destroy_cm_id while in the context of this callback;
 279  * however, returning a non-zero value instructs the communication manager to
 280  * destroy the @cm_id after the callback completes.
 281  */
 282 typedef int (*ib_cm_handler)(struct ib_cm_id *cm_id,
 283                              struct ib_cm_event *event);
 284
 285 struct ib_cm_id {
 286         ib_cm_handler           cm_handler;
 287         void                    *context;
 288         u64                     service_id;
 289         u64                     service_mask;
 290         enum ib_cm_state        state;          /* internal CM/debug use */
 291         enum ib_cm_lap_state    lap_state;      /* internal CM/debug use */
 292         u32                     local_id;
 293         u32                     remote_id;
 294 };
 295
 296 /**
 297  * ib_create_cm_id - Allocate a communication identifier.
 298  * @cm_handler: Callback invoked to notify the user of CM events.
 299  * @context: User specified context associated with the communication
 300  *   identifier.
 301  *
 302  * Communication identifiers are used to track connection states, service
 303  * ID resolution requests, and listen requests.
 304  */
 305 struct ib_cm_id *ib_create_cm_id(ib_cm_handler cm_handler,
 306                                  void *context);
 307
 308 /**
 309  * ib_destroy_cm_id - Destroy a connection identifier.
 310  * @cm_id: Connection identifier to destroy.
 311  *
 312  * This call blocks until the connection identifier is destroyed.
 313  */
 314 void ib_destroy_cm_id(struct ib_cm_id *cm_id);
 315
 316 #define IB_SERVICE_ID_AGN_MASK  __constant_cpu_to_be64(0xFF00000000000000ULL)
 317 #define IB_CM_ASSIGN_SERVICE_ID __constant_cpu_to_be64(0x0200000000000000ULL)
 318
 319 /**
 320  * ib_cm_listen - Initiates listening on the specified service ID for
 321  *   connection and service ID resolution requests.
 322  * @cm_id: Connection identifier associated with the listen request.
 323  * @service_id: Service identifier matched against incoming connection
 324  *   and service ID resolution requests.  The service ID should be specified
 325  *   network-byte order.  If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
 326  *   assign a service ID to the caller.
 327  * @service_mask: Mask applied to service ID used to listen across a
 328  *   range of service IDs.  If set to 0, the service ID is matched
 329  *   exactly.  This parameter is ignored if %service_id is set to
 330  *   IB_CM_ASSIGN_SERVICE_ID.
 331  */
 332 int ib_cm_listen(struct ib_cm_id *cm_id,
 333                  u64 service_id,
 334                  u64 service_mask);
 335
 336 struct ib_cm_req_param {
 337         struct ib_sa_path_rec   *primary_path;
 338         struct ib_sa_path_rec   *alternate_path;
 339         u64                     service_id;
 340         u32                     qp_num;
 341         enum ib_qp_type         qp_type;
 342         u32                     starting_psn;
 343         const void              *private_data;
 344         u8                      private_data_len;
 345         u8                      peer_to_peer;
 346         u8                      responder_resources;
 347         u8                      initiator_depth;
 348         u8                      remote_cm_response_timeout;
 349         u8                      flow_control;
 350         u8                      local_cm_response_timeout;
 351         u8                      retry_count;
 352         u8                      rnr_retry_count;
 353         u8                      max_cm_retries;
 354         u8                      srq;
 355 };
 356
 357 /**
 358  * ib_send_cm_req - Sends a connection request to the remote node.
 359  * @cm_id: Connection identifier that will be associated with the
 360  *   connection request.
 361  * @param: Connection request information needed to establish the
 362  *   connection.
 363  */
 364 int ib_send_cm_req(struct ib_cm_id *cm_id,
 365                    struct ib_cm_req_param *param);
 366
 367 struct ib_cm_rep_param {
 368         u32             qp_num;
 369         u32             starting_psn;
 370         const void      *private_data;
 371         u8              private_data_len;
 372         u8              responder_resources;
 373         u8              initiator_depth;
 374         u8              target_ack_delay;
 375         u8              failover_accepted;
 376         u8              flow_control;
 377         u8              rnr_retry_count;
 378         u8              srq;
 379 };
 380
 381 /**
 382  * ib_send_cm_rep - Sends a connection reply in response to a connection
 383  *   request.
 384  * @cm_id: Connection identifier that will be associated with the
 385  *   connection request.
 386  * @param: Connection reply information needed to establish the
 387  *   connection.
 388  */
 389 int ib_send_cm_rep(struct ib_cm_id *cm_id,
 390                    struct ib_cm_rep_param *param);
 391
 392 /**
 393  * ib_send_cm_rtu - Sends a connection ready to use message in response
 394  *   to a connection reply message.
 395  * @cm_id: Connection identifier associated with the connection request.
 396  * @private_data: Optional user-defined private data sent with the
 397  *   ready to use message.
 398  * @private_data_len: Size of the private data buffer, in bytes.
 399  */
 400 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
 401                    const void *private_data,
 402                    u8 private_data_len);
 403
 404 /**
 405  * ib_send_cm_dreq - Sends a disconnection request for an existing
 406  *   connection.
 407  * @cm_id: Connection identifier associated with the connection being
 408  *   released.
 409  * @private_data: Optional user-defined private data sent with the
 410  *   disconnection request message.
 411  * @private_data_len: Size of the private data buffer, in bytes.
 412  */
 413 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
 414                     const void *private_data,
 415                     u8 private_data_len);
 416
 417 /**
 418  * ib_send_cm_drep - Sends a disconnection reply to a disconnection request.
 419  * @cm_id: Connection identifier associated with the connection being
 420  *   released.
 421  * @private_data: Optional user-defined private data sent with the
 422  *   disconnection reply message.
 423  * @private_data_len: Size of the private data buffer, in bytes.
 424  *
 425  * If the cm_id is in the correct state, the CM will transition the connection
 426  * to the timewait state, even if an error occurs sending the DREP message.
 427  */
 428 int ib_send_cm_drep(struct ib_cm_id *cm_id,
 429                     const void *private_data,
 430                     u8 private_data_len);
 431
 432 /**
 433  * ib_cm_establish - Forces a connection state to established.
 434  * @cm_id: Connection identifier to transition to established.
 435  *
 436  * This routine should be invoked by users who receive messages on a
 437  * connected QP before an RTU has been received.
 438  */
 439 int ib_cm_establish(struct ib_cm_id *cm_id);
 440
 441 /**
 442  * ib_send_cm_rej - Sends a connection rejection message to the
 443  *   remote node.
 444  * @cm_id: Connection identifier associated with the connection being
 445  *   rejected.
 446  * @reason: Reason for the connection request rejection.
 447  * @ari: Optional additional rejection information.
 448  * @ari_length: Size of the additional rejection information, in bytes.
 449  * @private_data: Optional user-defined private data sent with the
 450  *   rejection message.
 451  * @private_data_len: Size of the private data buffer, in bytes.
 452  */
 453 int ib_send_cm_rej(struct ib_cm_id *cm_id,
 454                    enum ib_cm_rej_reason reason,
 455                    void *ari,
 456                    u8 ari_length,
 457                    const void *private_data,
 458                    u8 private_data_len);
 459
 460 /**
 461  * ib_send_cm_mra - Sends a message receipt acknowledgement to a connection
 462  *   message.
 463  * @cm_id: Connection identifier associated with the connection message.
 464  * @service_timeout: The maximum time required for the sender to reply to
 465  *   to the connection message.
 466  * @private_data: Optional user-defined private data sent with the
 467  *   message receipt acknowledgement.
 468  * @private_data_len: Size of the private data buffer, in bytes.
 469  */
 470 int ib_send_cm_mra(struct ib_cm_id *cm_id,
 471                    u8 service_timeout,
 472                    const void *private_data,
 473                    u8 private_data_len);
 474
 475 /**
 476  * ib_send_cm_lap - Sends a load alternate path request.
 477  * @cm_id: Connection identifier associated with the load alternate path
 478  *   message.
 479  * @alternate_path: A path record that identifies the alternate path to
 480  *   load.
 481  * @private_data: Optional user-defined private data sent with the
 482  *   load alternate path message.
 483  * @private_data_len: Size of the private data buffer, in bytes.
 484  */
 485 int ib_send_cm_lap(struct ib_cm_id *cm_id,
 486                    struct ib_sa_path_rec *alternate_path,
 487                    const void *private_data,
 488                    u8 private_data_len);
 489
 490 /**
 491  * ib_cm_init_qp_attr - Initializes the QP attributes for use in transitioning
 492  *   to a specified QP state.
 493  * @cm_id: Communication identifier associated with the QP attributes to
 494  *   initialize.
 495  * @qp_attr: On input, specifies the desired QP state.  On output, the
 496  *   mandatory and desired optional attributes will be set in order to
 497  *   modify the QP to the specified state.
 498  * @qp_attr_mask: The QP attribute mask that may be used to transition the
 499  *   QP to the specified state.
 500  *
 501  * Users must set the @qp_attr->qp_state to the desired QP state.  This call
 502  * will set all required attributes for the given transition, along with
 503  * known optional attributes.  Users may override the attributes returned from
 504  * this call before calling ib_modify_qp.
 505  */
 506 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
 507                        struct ib_qp_attr *qp_attr,
 508                        int *qp_attr_mask);
 509
 510 /**
 511  * ib_send_cm_apr - Sends an alternate path response message in response to
 512  *   a load alternate path request.
 513  * @cm_id: Connection identifier associated with the alternate path response.
 514  * @status: Reply status sent with the alternate path response.
 515  * @info: Optional additional information sent with the alternate path
 516  *   response.
 517  * @info_length: Size of the additional information, in bytes.
 518  * @private_data: Optional user-defined private data sent with the
 519  *   alternate path response message.
 520  * @private_data_len: Size of the private data buffer, in bytes.
 521  */
 522 int ib_send_cm_apr(struct ib_cm_id *cm_id,
 523                    enum ib_cm_apr_status status,
 524                    void *info,
 525                    u8 info_length,
 526                    const void *private_data,
 527                    u8 private_data_len);
 528
 529 struct ib_cm_sidr_req_param {
 530         struct ib_sa_path_rec   *path;
 531         u64                     service_id;
 532         int                     timeout_ms;
 533         const void              *private_data;
 534         u8                      private_data_len;
 535         u8                      max_cm_retries;
 536         u16                     pkey;
 537 };
 538
 539 /**
 540  * ib_send_cm_sidr_req - Sends a service ID resolution request to the
 541  *   remote node.
 542  * @cm_id: Communication identifier that will be associated with the
 543  *   service ID resolution request.
 544  * @param: Service ID resolution request information.
 545  */
 546 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
 547                         struct ib_cm_sidr_req_param *param);
 548
 549 struct ib_cm_sidr_rep_param {
 550         u32                     qp_num;
 551         u32                     qkey;
 552         enum ib_cm_sidr_status  status;
 553         const void              *info;
 554         u8                      info_length;
 555         const void              *private_data;
 556         u8                      private_data_len;
 557 };
 558
 559 /**
 560  * ib_send_cm_sidr_rep - Sends a service ID resolution request to the
 561  *   remote node.
 562  * @cm_id: Communication identifier associated with the received service ID
 563  *   resolution request.
 564  * @param: Service ID resolution reply information.
 565  */
 566 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
 567                         struct ib_cm_sidr_rep_param *param);
 568
 569 #endif /* IB_CM_H */