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TOMOYO Linux Cross Reference
Linux/include/rdma/ib_cm.h

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

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