include/rdma/ib_cm.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
   2 /*
   3  * Copyright (c) 2004, 2005 Intel Corporation.  All rights reserved.
   4  * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
   5  * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
   6  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   7  * Copyright (c) 2019, Mellanox Technologies inc.  All rights reserved.
   8  */
   9 #ifndef IB_CM_H
  10 #define IB_CM_H
  11
  12 #include <rdma/ib_mad.h>
  13 #include <rdma/ib_sa.h>
  14
  15 /* ib_cm and ib_user_cm modules share /sys/class/infiniband_cm */
  16 extern struct class cm_class;
  17
  18 enum ib_cm_state {
  19         IB_CM_IDLE,
  20         IB_CM_LISTEN,
  21         IB_CM_REQ_SENT,
  22         IB_CM_REQ_RCVD,
  23         IB_CM_MRA_REQ_SENT,
  24         IB_CM_MRA_REQ_RCVD,
  25         IB_CM_REP_SENT,
  26         IB_CM_REP_RCVD,
  27         IB_CM_MRA_REP_SENT,
  28         IB_CM_MRA_REP_RCVD,
  29         IB_CM_ESTABLISHED,
  30         IB_CM_DREQ_SENT,
  31         IB_CM_DREQ_RCVD,
  32         IB_CM_TIMEWAIT,
  33         IB_CM_SIDR_REQ_SENT,
  34         IB_CM_SIDR_REQ_RCVD
  35 };
  36
  37 enum ib_cm_lap_state {
  38         IB_CM_LAP_UNINIT,
  39         IB_CM_LAP_IDLE,
  40         IB_CM_LAP_SENT,
  41         IB_CM_LAP_RCVD,
  42         IB_CM_MRA_LAP_SENT,
  43         IB_CM_MRA_LAP_RCVD,
  44 };
  45
  46 enum ib_cm_event_type {
  47         IB_CM_REQ_ERROR,
  48         IB_CM_REQ_RECEIVED,
  49         IB_CM_REP_ERROR,
  50         IB_CM_REP_RECEIVED,
  51         IB_CM_RTU_RECEIVED,
  52         IB_CM_USER_ESTABLISHED,
  53         IB_CM_DREQ_ERROR,
  54         IB_CM_DREQ_RECEIVED,
  55         IB_CM_DREP_RECEIVED,
  56         IB_CM_TIMEWAIT_EXIT,
  57         IB_CM_MRA_RECEIVED,
  58         IB_CM_REJ_RECEIVED,
  59         IB_CM_LAP_ERROR,
  60         IB_CM_LAP_RECEIVED,
  61         IB_CM_APR_RECEIVED,
  62         IB_CM_SIDR_REQ_ERROR,
  63         IB_CM_SIDR_REQ_RECEIVED,
  64         IB_CM_SIDR_REP_RECEIVED
  65 };
  66
  67 enum ib_cm_data_size {
  68         IB_CM_REQ_PRIVATE_DATA_SIZE      = 92,
  69         IB_CM_MRA_PRIVATE_DATA_SIZE      = 222,
  70         IB_CM_REJ_PRIVATE_DATA_SIZE      = 148,
  71         IB_CM_REP_PRIVATE_DATA_SIZE      = 196,
  72         IB_CM_RTU_PRIVATE_DATA_SIZE      = 224,
  73         IB_CM_DREQ_PRIVATE_DATA_SIZE     = 220,
  74         IB_CM_DREP_PRIVATE_DATA_SIZE     = 224,
  75         IB_CM_REJ_ARI_LENGTH             = 72,
  76         IB_CM_LAP_PRIVATE_DATA_SIZE      = 168,
  77         IB_CM_APR_PRIVATE_DATA_SIZE      = 148,
  78         IB_CM_APR_INFO_LENGTH            = 72,
  79         IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE = 216,
  80         IB_CM_SIDR_REP_PRIVATE_DATA_SIZE = 136,
  81         IB_CM_SIDR_REP_INFO_LENGTH       = 72,
  82 };
  83
  84 struct ib_cm_id;
  85
  86 struct ib_cm_req_event_param {
  87         struct ib_cm_id         *listen_id;
  88
  89         /* P_Key that was used by the GMP's BTH header */
  90         u16                     bth_pkey;
  91
  92         u8                      port;
  93
  94         struct sa_path_rec      *primary_path;
  95         struct sa_path_rec      *alternate_path;
  96
  97         /*
  98          * SGID attribute of the primary path. Currently only
  99          * useful for RoCE. Alternate path GID attributes
 100          * are not yet supported.
 101          */
 102         const struct ib_gid_attr *ppath_sgid_attr;
 103
 104         __be64                  remote_ca_guid;
 105         u32                     remote_qkey;
 106         u32                     remote_qpn;
 107         enum ib_qp_type         qp_type;
 108
 109         u32                     starting_psn;
 110         u8                      responder_resources;
 111         u8                      initiator_depth;
 112         unsigned int            local_cm_response_timeout:5;
 113         unsigned int            flow_control:1;
 114         unsigned int            remote_cm_response_timeout:5;
 115         unsigned int            retry_count:3;
 116         unsigned int            rnr_retry_count:3;
 117         unsigned int            srq:1;
 118 };
 119
 120 struct ib_cm_rep_event_param {
 121         __be64                  remote_ca_guid;
 122         u32                     remote_qkey;
 123         u32                     remote_qpn;
 124         u32                     starting_psn;
 125         u8                      responder_resources;
 126         u8                      initiator_depth;
 127         unsigned int            target_ack_delay:5;
 128         unsigned int            failover_accepted:2;
 129         unsigned int            flow_control:1;
 130         unsigned int            rnr_retry_count:3;
 131         unsigned int            srq:1;
 132 };
 133
 134 enum ib_cm_rej_reason {
 135         IB_CM_REJ_NO_QP                         = 1,
 136         IB_CM_REJ_NO_EEC                        = 2,
 137         IB_CM_REJ_NO_RESOURCES                  = 3,
 138         IB_CM_REJ_TIMEOUT                       = 4,
 139         IB_CM_REJ_UNSUPPORTED                   = 5,
 140         IB_CM_REJ_INVALID_COMM_ID               = 6,
 141         IB_CM_REJ_INVALID_COMM_INSTANCE         = 7,
 142         IB_CM_REJ_INVALID_SERVICE_ID            = 8,
 143         IB_CM_REJ_INVALID_TRANSPORT_TYPE        = 9,
 144         IB_CM_REJ_STALE_CONN                    = 10,
 145         IB_CM_REJ_RDC_NOT_EXIST                 = 11,
 146         IB_CM_REJ_INVALID_GID                   = 12,
 147         IB_CM_REJ_INVALID_LID                   = 13,
 148         IB_CM_REJ_INVALID_SL                    = 14,
 149         IB_CM_REJ_INVALID_TRAFFIC_CLASS         = 15,
 150         IB_CM_REJ_INVALID_HOP_LIMIT             = 16,
 151         IB_CM_REJ_INVALID_PACKET_RATE           = 17,
 152         IB_CM_REJ_INVALID_ALT_GID               = 18,
 153         IB_CM_REJ_INVALID_ALT_LID               = 19,
 154         IB_CM_REJ_INVALID_ALT_SL                = 20,
 155         IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS     = 21,
 156         IB_CM_REJ_INVALID_ALT_HOP_LIMIT         = 22,
 157         IB_CM_REJ_INVALID_ALT_PACKET_RATE       = 23,
 158         IB_CM_REJ_PORT_CM_REDIRECT              = 24,
 159         IB_CM_REJ_PORT_REDIRECT                 = 25,
 160         IB_CM_REJ_INVALID_MTU                   = 26,
 161         IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES   = 27,
 162         IB_CM_REJ_CONSUMER_DEFINED              = 28,
 163         IB_CM_REJ_INVALID_RNR_RETRY             = 29,
 164         IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID       = 30,
 165         IB_CM_REJ_INVALID_CLASS_VERSION         = 31,
 166         IB_CM_REJ_INVALID_FLOW_LABEL            = 32,
 167         IB_CM_REJ_INVALID_ALT_FLOW_LABEL        = 33
 168 };
 169
 170 struct ib_cm_rej_event_param {
 171         enum ib_cm_rej_reason   reason;
 172         void                    *ari;
 173         u8                      ari_length;
 174 };
 175
 176 struct ib_cm_mra_event_param {
 177         u8      service_timeout;
 178 };
 179
 180 struct ib_cm_lap_event_param {
 181         struct sa_path_rec      *alternate_path;
 182 };
 183
 184 enum ib_cm_apr_status {
 185         IB_CM_APR_SUCCESS,
 186         IB_CM_APR_INVALID_COMM_ID,
 187         IB_CM_APR_UNSUPPORTED,
 188         IB_CM_APR_REJECT,
 189         IB_CM_APR_REDIRECT,
 190         IB_CM_APR_IS_CURRENT,
 191         IB_CM_APR_INVALID_QPN_EECN,
 192         IB_CM_APR_INVALID_LID,
 193         IB_CM_APR_INVALID_GID,
 194         IB_CM_APR_INVALID_FLOW_LABEL,
 195         IB_CM_APR_INVALID_TCLASS,
 196         IB_CM_APR_INVALID_HOP_LIMIT,
 197         IB_CM_APR_INVALID_PACKET_RATE,
 198         IB_CM_APR_INVALID_SL
 199 };
 200
 201 struct ib_cm_apr_event_param {
 202         enum ib_cm_apr_status   ap_status;
 203         void                    *apr_info;
 204         u8                      info_len;
 205 };
 206
 207 struct ib_cm_sidr_req_event_param {
 208         struct ib_cm_id         *listen_id;
 209         __be64                  service_id;
 210
 211         /*
 212          * SGID attribute of the request. Currently only
 213          * useful for RoCE.
 214          */
 215         const struct ib_gid_attr *sgid_attr;
 216         /* P_Key that was used by the GMP's BTH header */
 217         u16                     bth_pkey;
 218         u8                      port;
 219         u16                     pkey;
 220 };
 221
 222 enum ib_cm_sidr_status {
 223         IB_SIDR_SUCCESS,
 224         IB_SIDR_UNSUPPORTED,
 225         IB_SIDR_REJECT,
 226         IB_SIDR_NO_QP,
 227         IB_SIDR_REDIRECT,
 228         IB_SIDR_UNSUPPORTED_VERSION
 229 };
 230
 231 struct ib_cm_sidr_rep_event_param {
 232         enum ib_cm_sidr_status  status;
 233         u32                     qkey;
 234         u32                     qpn;
 235         void                    *info;
 236         const struct ib_gid_attr *sgid_attr;
 237         u8                      info_len;
 238 };
 239
 240 struct ib_cm_event {
 241         enum ib_cm_event_type   event;
 242         union {
 243                 struct ib_cm_req_event_param    req_rcvd;
 244                 struct ib_cm_rep_event_param    rep_rcvd;
 245                 /* No data for RTU received events. */
 246                 struct ib_cm_rej_event_param    rej_rcvd;
 247                 struct ib_cm_mra_event_param    mra_rcvd;
 248                 struct ib_cm_lap_event_param    lap_rcvd;
 249                 struct ib_cm_apr_event_param    apr_rcvd;
 250                 /* No data for DREQ/DREP received events. */
 251                 struct ib_cm_sidr_req_event_param sidr_req_rcvd;
 252                 struct ib_cm_sidr_rep_event_param sidr_rep_rcvd;
 253                 enum ib_wc_status               send_status;
 254         } param;
 255
 256         void                    *private_data;
 257 };
 258
 259 #define CM_REQ_ATTR_ID          cpu_to_be16(0x0010)
 260 #define CM_MRA_ATTR_ID          cpu_to_be16(0x0011)
 261 #define CM_REJ_ATTR_ID          cpu_to_be16(0x0012)
 262 #define CM_REP_ATTR_ID          cpu_to_be16(0x0013)
 263 #define CM_RTU_ATTR_ID          cpu_to_be16(0x0014)
 264 #define CM_DREQ_ATTR_ID         cpu_to_be16(0x0015)
 265 #define CM_DREP_ATTR_ID         cpu_to_be16(0x0016)
 266 #define CM_SIDR_REQ_ATTR_ID     cpu_to_be16(0x0017)
 267 #define CM_SIDR_REP_ATTR_ID     cpu_to_be16(0x0018)
 268 #define CM_LAP_ATTR_ID          cpu_to_be16(0x0019)
 269 #define CM_APR_ATTR_ID          cpu_to_be16(0x001A)
 270
 271 /**
 272  * ib_cm_handler - User-defined callback to process communication events.
 273  * @cm_id: Communication identifier associated with the reported event.
 274  * @event: Information about the communication event.
 275  *
 276  * IB_CM_REQ_RECEIVED and IB_CM_SIDR_REQ_RECEIVED communication events
 277  * generated as a result of listen requests result in the allocation of a
 278  * new @cm_id.  The new @cm_id is returned to the user through this callback.
 279  * Clients are responsible for destroying the new @cm_id.  For peer-to-peer
 280  * IB_CM_REQ_RECEIVED and all other events, the returned @cm_id corresponds
 281  * to a user's existing communication identifier.
 282  *
 283  * Users may not call ib_destroy_cm_id while in the context of this callback;
 284  * however, returning a non-zero value instructs the communication manager to
 285  * destroy the @cm_id after the callback completes.
 286  */
 287 typedef int (*ib_cm_handler)(struct ib_cm_id *cm_id,
 288                              const struct ib_cm_event *event);
 289
 290 struct ib_cm_id {
 291         ib_cm_handler           cm_handler;
 292         void                    *context;
 293         struct ib_device        *device;
 294         __be64                  service_id;
 295         __be64                  service_mask;
 296         enum ib_cm_state        state;          /* internal CM/debug use */
 297         enum ib_cm_lap_state    lap_state;      /* internal CM/debug use */
 298         __be32                  local_id;
 299         __be32                  remote_id;
 300         u32                     remote_cm_qpn;  /* 1 unless redirected */
 301 };
 302
 303 /**
 304  * ib_create_cm_id - Allocate a communication identifier.
 305  * @device: Device associated with the cm_id.  All related communication will
 306  * be associated with the specified device.
 307  * @cm_handler: Callback invoked to notify the user of CM events.
 308  * @context: User specified context associated with the communication
 309  *   identifier.
 310  *
 311  * Communication identifiers are used to track connection states, service
 312  * ID resolution requests, and listen requests.
 313  */
 314 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
 315                                  ib_cm_handler cm_handler,
 316                                  void *context);
 317
 318 /**
 319  * ib_destroy_cm_id - Destroy a connection identifier.
 320  * @cm_id: Connection identifier to destroy.
 321  *
 322  * This call blocks until the connection identifier is destroyed.
 323  */
 324 void ib_destroy_cm_id(struct ib_cm_id *cm_id);
 325
 326 #define IB_SERVICE_ID_AGN_MASK  cpu_to_be64(0xFF00000000000000ULL)
 327 #define IB_CM_ASSIGN_SERVICE_ID cpu_to_be64(0x0200000000000000ULL)
 328 #define IB_CMA_SERVICE_ID       cpu_to_be64(0x0000000001000000ULL)
 329 #define IB_CMA_SERVICE_ID_MASK  cpu_to_be64(0xFFFFFFFFFF000000ULL)
 330 #define IB_SDP_SERVICE_ID       cpu_to_be64(0x0000000000010000ULL)
 331 #define IB_SDP_SERVICE_ID_MASK  cpu_to_be64(0xFFFFFFFFFFFF0000ULL)
 332
 333 /**
 334  * ib_cm_listen - Initiates listening on the specified service ID for
 335  *   connection and service ID resolution requests.
 336  * @cm_id: Connection identifier associated with the listen request.
 337  * @service_id: Service identifier matched against incoming connection
 338  *   and service ID resolution requests.  The service ID should be specified
 339  *   network-byte order.  If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
 340  *   assign a service ID to the caller.
 341  * @service_mask: Mask applied to service ID used to listen across a
 342  *   range of service IDs.  If set to 0, the service ID is matched
 343  *   exactly.  This parameter is ignored if %service_id is set to
 344  *   IB_CM_ASSIGN_SERVICE_ID.
 345  */
 346 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id,
 347                  __be64 service_mask);
 348
 349 struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
 350                                      ib_cm_handler cm_handler,
 351                                      __be64 service_id);
 352
 353 struct ib_cm_req_param {
 354         struct sa_path_rec      *primary_path;
 355         struct sa_path_rec      *alternate_path;
 356         const struct ib_gid_attr *ppath_sgid_attr;
 357         __be64                  service_id;
 358         u32                     qp_num;
 359         enum ib_qp_type         qp_type;
 360         u32                     starting_psn;
 361         const void              *private_data;
 362         u8                      private_data_len;
 363         u8                      peer_to_peer;
 364         u8                      responder_resources;
 365         u8                      initiator_depth;
 366         u8                      remote_cm_response_timeout;
 367         u8                      flow_control;
 368         u8                      local_cm_response_timeout;
 369         u8                      retry_count;
 370         u8                      rnr_retry_count;
 371         u8                      max_cm_retries;
 372         u8                      srq;
 373 };
 374
 375 /**
 376  * ib_send_cm_req - Sends a connection request to the remote node.
 377  * @cm_id: Connection identifier that will be associated with the
 378  *   connection request.
 379  * @param: Connection request information needed to establish the
 380  *   connection.
 381  */
 382 int ib_send_cm_req(struct ib_cm_id *cm_id,
 383                    struct ib_cm_req_param *param);
 384
 385 struct ib_cm_rep_param {
 386         u32             qp_num;
 387         u32             starting_psn;
 388         const void      *private_data;
 389         u8              private_data_len;
 390         u8              responder_resources;
 391         u8              initiator_depth;
 392         u8              failover_accepted;
 393         u8              flow_control;
 394         u8              rnr_retry_count;
 395         u8              srq;
 396 };
 397
 398 /**
 399  * ib_send_cm_rep - Sends a connection reply in response to a connection
 400  *   request.
 401  * @cm_id: Connection identifier that will be associated with the
 402  *   connection request.
 403  * @param: Connection reply information needed to establish the
 404  *   connection.
 405  */
 406 int ib_send_cm_rep(struct ib_cm_id *cm_id,
 407                    struct ib_cm_rep_param *param);
 408
 409 /**
 410  * ib_send_cm_rtu - Sends a connection ready to use message in response
 411  *   to a connection reply message.
 412  * @cm_id: Connection identifier associated with the connection request.
 413  * @private_data: Optional user-defined private data sent with the
 414  *   ready to use message.
 415  * @private_data_len: Size of the private data buffer, in bytes.
 416  */
 417 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
 418                    const void *private_data,
 419                    u8 private_data_len);
 420
 421 /**
 422  * ib_send_cm_dreq - Sends a disconnection request for an existing
 423  *   connection.
 424  * @cm_id: Connection identifier associated with the connection being
 425  *   released.
 426  * @private_data: Optional user-defined private data sent with the
 427  *   disconnection request message.
 428  * @private_data_len: Size of the private data buffer, in bytes.
 429  */
 430 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
 431                     const void *private_data,
 432                     u8 private_data_len);
 433
 434 /**
 435  * ib_send_cm_drep - Sends a disconnection reply to a disconnection request.
 436  * @cm_id: Connection identifier associated with the connection being
 437  *   released.
 438  * @private_data: Optional user-defined private data sent with the
 439  *   disconnection reply message.
 440  * @private_data_len: Size of the private data buffer, in bytes.
 441  *
 442  * If the cm_id is in the correct state, the CM will transition the connection
 443  * to the timewait state, even if an error occurs sending the DREP message.
 444  */
 445 int ib_send_cm_drep(struct ib_cm_id *cm_id,
 446                     const void *private_data,
 447                     u8 private_data_len);
 448
 449 /**
 450  * ib_cm_notify - Notifies the CM of an event reported to the consumer.
 451  * @cm_id: Connection identifier to transition to established.
 452  * @event: Type of event.
 453  *
 454  * This routine should be invoked by users to notify the CM of relevant
 455  * communication events.  Events that should be reported to the CM and
 456  * when to report them are:
 457  *
 458  * IB_EVENT_COMM_EST - Used when a message is received on a connected
 459  *    QP before an RTU has been received.
 460  * IB_EVENT_PATH_MIG - Notifies the CM that the connection has failed over
 461  *   to the alternate path.
 462  */
 463 int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event);
 464
 465 /**
 466  * ib_send_cm_rej - Sends a connection rejection message to the
 467  *   remote node.
 468  * @cm_id: Connection identifier associated with the connection being
 469  *   rejected.
 470  * @reason: Reason for the connection request rejection.
 471  * @ari: Optional additional rejection information.
 472  * @ari_length: Size of the additional rejection information, in bytes.
 473  * @private_data: Optional user-defined private data sent with the
 474  *   rejection message.
 475  * @private_data_len: Size of the private data buffer, in bytes.
 476  */
 477 int ib_send_cm_rej(struct ib_cm_id *cm_id,
 478                    enum ib_cm_rej_reason reason,
 479                    void *ari,
 480                    u8 ari_length,
 481                    const void *private_data,
 482                    u8 private_data_len);
 483
 484 #define IB_CM_MRA_FLAG_DELAY 0x80  /* Send MRA only after a duplicate msg */
 485
 486 /**
 487  * ib_send_cm_mra - Sends a message receipt acknowledgement to a connection
 488  *   message.
 489  * @cm_id: Connection identifier associated with the connection message.
 490  * @service_timeout: The lower 5-bits specify the maximum time required for
 491  *   the sender to reply to the connection message.  The upper 3-bits
 492  *   specify additional control flags.
 493  * @private_data: Optional user-defined private data sent with the
 494  *   message receipt acknowledgement.
 495  * @private_data_len: Size of the private data buffer, in bytes.
 496  */
 497 int ib_send_cm_mra(struct ib_cm_id *cm_id,
 498                    u8 service_timeout,
 499                    const void *private_data,
 500                    u8 private_data_len);
 501
 502 /**
 503  * ib_cm_init_qp_attr - Initializes the QP attributes for use in transitioning
 504  *   to a specified QP state.
 505  * @cm_id: Communication identifier associated with the QP attributes to
 506  *   initialize.
 507  * @qp_attr: On input, specifies the desired QP state.  On output, the
 508  *   mandatory and desired optional attributes will be set in order to
 509  *   modify the QP to the specified state.
 510  * @qp_attr_mask: The QP attribute mask that may be used to transition the
 511  *   QP to the specified state.
 512  *
 513  * Users must set the @qp_attr->qp_state to the desired QP state.  This call
 514  * will set all required attributes for the given transition, along with
 515  * known optional attributes.  Users may override the attributes returned from
 516  * this call before calling ib_modify_qp.
 517  */
 518 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
 519                        struct ib_qp_attr *qp_attr,
 520                        int *qp_attr_mask);
 521
 522 struct ib_cm_sidr_req_param {
 523         struct sa_path_rec      *path;
 524         const struct ib_gid_attr *sgid_attr;
 525         __be64                  service_id;
 526         unsigned long           timeout_ms;
 527         const void              *private_data;
 528         u8                      private_data_len;
 529         u8                      max_cm_retries;
 530 };
 531
 532 /**
 533  * ib_send_cm_sidr_req - Sends a service ID resolution request to the
 534  *   remote node.
 535  * @cm_id: Communication identifier that will be associated with the
 536  *   service ID resolution request.
 537  * @param: Service ID resolution request information.
 538  */
 539 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
 540                         struct ib_cm_sidr_req_param *param);
 541
 542 struct ib_cm_sidr_rep_param {
 543         u32                     qp_num;
 544         u32                     qkey;
 545         enum ib_cm_sidr_status  status;
 546         const void              *info;
 547         u8                      info_length;
 548         const void              *private_data;
 549         u8                      private_data_len;
 550 };
 551
 552 /**
 553  * ib_send_cm_sidr_rep - Sends a service ID resolution reply to the
 554  *   remote node.
 555  * @cm_id: Communication identifier associated with the received service ID
 556  *   resolution request.
 557  * @param: Service ID resolution reply information.
 558  */
 559 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
 560                         struct ib_cm_sidr_rep_param *param);
 561
 562 /**
 563  * ibcm_reject_msg - return a pointer to a reject message string.
 564  * @reason: Value returned in the REJECT event status field.
 565  */
 566 const char *__attribute_const__ ibcm_reject_msg(int reason);
 567
 568 #endif /* IB_CM_H */