include/rdma/ib_cm.h

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