xref: /openbmc/linux/include/rdma/ib_cm.h (revision 643d1f7f)
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  * $Id: ib_cm.h 4311 2005-12-05 18:42:01Z sean.hefty $
36  */
37 #if !defined(IB_CM_H)
38 #define IB_CM_H
39 
40 #include <rdma/ib_mad.h>
41 #include <rdma/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_UNINIT,
64 	IB_CM_LAP_IDLE,
65 	IB_CM_LAP_SENT,
66 	IB_CM_LAP_RCVD,
67 	IB_CM_MRA_LAP_SENT,
68 	IB_CM_MRA_LAP_RCVD,
69 };
70 
71 enum ib_cm_event_type {
72 	IB_CM_REQ_ERROR,
73 	IB_CM_REQ_RECEIVED,
74 	IB_CM_REP_ERROR,
75 	IB_CM_REP_RECEIVED,
76 	IB_CM_RTU_RECEIVED,
77 	IB_CM_USER_ESTABLISHED,
78 	IB_CM_DREQ_ERROR,
79 	IB_CM_DREQ_RECEIVED,
80 	IB_CM_DREP_RECEIVED,
81 	IB_CM_TIMEWAIT_EXIT,
82 	IB_CM_MRA_RECEIVED,
83 	IB_CM_REJ_RECEIVED,
84 	IB_CM_LAP_ERROR,
85 	IB_CM_LAP_RECEIVED,
86 	IB_CM_APR_RECEIVED,
87 	IB_CM_SIDR_REQ_ERROR,
88 	IB_CM_SIDR_REQ_RECEIVED,
89 	IB_CM_SIDR_REP_RECEIVED
90 };
91 
92 enum ib_cm_data_size {
93 	IB_CM_REQ_PRIVATE_DATA_SIZE	 = 92,
94 	IB_CM_MRA_PRIVATE_DATA_SIZE	 = 222,
95 	IB_CM_REJ_PRIVATE_DATA_SIZE	 = 148,
96 	IB_CM_REP_PRIVATE_DATA_SIZE	 = 196,
97 	IB_CM_RTU_PRIVATE_DATA_SIZE	 = 224,
98 	IB_CM_DREQ_PRIVATE_DATA_SIZE	 = 220,
99 	IB_CM_DREP_PRIVATE_DATA_SIZE	 = 224,
100 	IB_CM_REJ_ARI_LENGTH		 = 72,
101 	IB_CM_LAP_PRIVATE_DATA_SIZE	 = 168,
102 	IB_CM_APR_PRIVATE_DATA_SIZE	 = 148,
103 	IB_CM_APR_INFO_LENGTH		 = 72,
104 	IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE = 216,
105 	IB_CM_SIDR_REP_PRIVATE_DATA_SIZE = 136,
106 	IB_CM_SIDR_REP_INFO_LENGTH	 = 72,
107 	IB_CM_COMPARE_SIZE		 = 64
108 };
109 
110 struct ib_cm_id;
111 
112 struct ib_cm_req_event_param {
113 	struct ib_cm_id		*listen_id;
114 	u8			port;
115 
116 	struct ib_sa_path_rec	*primary_path;
117 	struct ib_sa_path_rec	*alternate_path;
118 
119 	__be64			remote_ca_guid;
120 	u32			remote_qkey;
121 	u32			remote_qpn;
122 	enum ib_qp_type		qp_type;
123 
124 	u32			starting_psn;
125 	u8			responder_resources;
126 	u8			initiator_depth;
127 	unsigned int		local_cm_response_timeout:5;
128 	unsigned int		flow_control:1;
129 	unsigned int		remote_cm_response_timeout:5;
130 	unsigned int		retry_count:3;
131 	unsigned int		rnr_retry_count:3;
132 	unsigned int		srq:1;
133 };
134 
135 struct ib_cm_rep_event_param {
136 	__be64			remote_ca_guid;
137 	u32			remote_qkey;
138 	u32			remote_qpn;
139 	u32			starting_psn;
140 	u8			responder_resources;
141 	u8			initiator_depth;
142 	unsigned int		target_ack_delay:5;
143 	unsigned int		failover_accepted:2;
144 	unsigned int		flow_control:1;
145 	unsigned int		rnr_retry_count:3;
146 	unsigned int		srq:1;
147 };
148 
149 enum ib_cm_rej_reason {
150 	IB_CM_REJ_NO_QP				= 1,
151 	IB_CM_REJ_NO_EEC			= 2,
152 	IB_CM_REJ_NO_RESOURCES			= 3,
153 	IB_CM_REJ_TIMEOUT			= 4,
154 	IB_CM_REJ_UNSUPPORTED			= 5,
155 	IB_CM_REJ_INVALID_COMM_ID		= 6,
156 	IB_CM_REJ_INVALID_COMM_INSTANCE		= 7,
157 	IB_CM_REJ_INVALID_SERVICE_ID		= 8,
158 	IB_CM_REJ_INVALID_TRANSPORT_TYPE	= 9,
159 	IB_CM_REJ_STALE_CONN			= 10,
160 	IB_CM_REJ_RDC_NOT_EXIST			= 11,
161 	IB_CM_REJ_INVALID_GID			= 12,
162 	IB_CM_REJ_INVALID_LID			= 13,
163 	IB_CM_REJ_INVALID_SL			= 14,
164 	IB_CM_REJ_INVALID_TRAFFIC_CLASS		= 15,
165 	IB_CM_REJ_INVALID_HOP_LIMIT		= 16,
166 	IB_CM_REJ_INVALID_PACKET_RATE		= 17,
167 	IB_CM_REJ_INVALID_ALT_GID		= 18,
168 	IB_CM_REJ_INVALID_ALT_LID		= 19,
169 	IB_CM_REJ_INVALID_ALT_SL		= 20,
170 	IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS	= 21,
171 	IB_CM_REJ_INVALID_ALT_HOP_LIMIT		= 22,
172 	IB_CM_REJ_INVALID_ALT_PACKET_RATE	= 23,
173 	IB_CM_REJ_PORT_CM_REDIRECT		= 24,
174 	IB_CM_REJ_PORT_REDIRECT			= 25,
175 	IB_CM_REJ_INVALID_MTU			= 26,
176 	IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES	= 27,
177 	IB_CM_REJ_CONSUMER_DEFINED		= 28,
178 	IB_CM_REJ_INVALID_RNR_RETRY		= 29,
179 	IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID	= 30,
180 	IB_CM_REJ_INVALID_CLASS_VERSION		= 31,
181 	IB_CM_REJ_INVALID_FLOW_LABEL		= 32,
182 	IB_CM_REJ_INVALID_ALT_FLOW_LABEL	= 33
183 };
184 
185 struct ib_cm_rej_event_param {
186 	enum ib_cm_rej_reason	reason;
187 	void			*ari;
188 	u8			ari_length;
189 };
190 
191 struct ib_cm_mra_event_param {
192 	u8	service_timeout;
193 };
194 
195 struct ib_cm_lap_event_param {
196 	struct ib_sa_path_rec	*alternate_path;
197 };
198 
199 enum ib_cm_apr_status {
200 	IB_CM_APR_SUCCESS,
201 	IB_CM_APR_INVALID_COMM_ID,
202 	IB_CM_APR_UNSUPPORTED,
203 	IB_CM_APR_REJECT,
204 	IB_CM_APR_REDIRECT,
205 	IB_CM_APR_IS_CURRENT,
206 	IB_CM_APR_INVALID_QPN_EECN,
207 	IB_CM_APR_INVALID_LID,
208 	IB_CM_APR_INVALID_GID,
209 	IB_CM_APR_INVALID_FLOW_LABEL,
210 	IB_CM_APR_INVALID_TCLASS,
211 	IB_CM_APR_INVALID_HOP_LIMIT,
212 	IB_CM_APR_INVALID_PACKET_RATE,
213 	IB_CM_APR_INVALID_SL
214 };
215 
216 struct ib_cm_apr_event_param {
217 	enum ib_cm_apr_status	ap_status;
218 	void			*apr_info;
219 	u8			info_len;
220 };
221 
222 struct ib_cm_sidr_req_event_param {
223 	struct ib_cm_id		*listen_id;
224 	u8			port;
225 	u16			pkey;
226 };
227 
228 enum ib_cm_sidr_status {
229 	IB_SIDR_SUCCESS,
230 	IB_SIDR_UNSUPPORTED,
231 	IB_SIDR_REJECT,
232 	IB_SIDR_NO_QP,
233 	IB_SIDR_REDIRECT,
234 	IB_SIDR_UNSUPPORTED_VERSION
235 };
236 
237 struct ib_cm_sidr_rep_event_param {
238 	enum ib_cm_sidr_status	status;
239 	u32			qkey;
240 	u32			qpn;
241 	void			*info;
242 	u8			info_len;
243 };
244 
245 struct ib_cm_event {
246 	enum ib_cm_event_type	event;
247 	union {
248 		struct ib_cm_req_event_param	req_rcvd;
249 		struct ib_cm_rep_event_param	rep_rcvd;
250 		/* No data for RTU received events. */
251 		struct ib_cm_rej_event_param	rej_rcvd;
252 		struct ib_cm_mra_event_param	mra_rcvd;
253 		struct ib_cm_lap_event_param	lap_rcvd;
254 		struct ib_cm_apr_event_param	apr_rcvd;
255 		/* No data for DREQ/DREP received events. */
256 		struct ib_cm_sidr_req_event_param sidr_req_rcvd;
257 		struct ib_cm_sidr_rep_event_param sidr_rep_rcvd;
258 		enum ib_wc_status		send_status;
259 	} param;
260 
261 	void			*private_data;
262 };
263 
264 /**
265  * ib_cm_handler - User-defined callback to process communication events.
266  * @cm_id: Communication identifier associated with the reported event.
267  * @event: Information about the communication event.
268  *
269  * IB_CM_REQ_RECEIVED and IB_CM_SIDR_REQ_RECEIVED communication events
270  * generated as a result of listen requests result in the allocation of a
271  * new @cm_id.  The new @cm_id is returned to the user through this callback.
272  * Clients are responsible for destroying the new @cm_id.  For peer-to-peer
273  * IB_CM_REQ_RECEIVED and all other events, the returned @cm_id corresponds
274  * to a user's existing communication identifier.
275  *
276  * Users may not call ib_destroy_cm_id while in the context of this callback;
277  * however, returning a non-zero value instructs the communication manager to
278  * destroy the @cm_id after the callback completes.
279  */
280 typedef int (*ib_cm_handler)(struct ib_cm_id *cm_id,
281 			     struct ib_cm_event *event);
282 
283 struct ib_cm_id {
284 	ib_cm_handler		cm_handler;
285 	void			*context;
286 	struct ib_device	*device;
287 	__be64			service_id;
288 	__be64			service_mask;
289 	enum ib_cm_state	state;		/* internal CM/debug use */
290 	enum ib_cm_lap_state	lap_state;	/* internal CM/debug use */
291 	__be32			local_id;
292 	__be32			remote_id;
293 	u32			remote_cm_qpn;  /* 1 unless redirected */
294 };
295 
296 /**
297  * ib_create_cm_id - Allocate a communication identifier.
298  * @device: Device associated with the cm_id.  All related communication will
299  * be associated with the specified device.
300  * @cm_handler: Callback invoked to notify the user of CM events.
301  * @context: User specified context associated with the communication
302  *   identifier.
303  *
304  * Communication identifiers are used to track connection states, service
305  * ID resolution requests, and listen requests.
306  */
307 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
308 				 ib_cm_handler cm_handler,
309 				 void *context);
310 
311 /**
312  * ib_destroy_cm_id - Destroy a connection identifier.
313  * @cm_id: Connection identifier to destroy.
314  *
315  * This call blocks until the connection identifier is destroyed.
316  */
317 void ib_destroy_cm_id(struct ib_cm_id *cm_id);
318 
319 #define IB_SERVICE_ID_AGN_MASK	__constant_cpu_to_be64(0xFF00000000000000ULL)
320 #define IB_CM_ASSIGN_SERVICE_ID __constant_cpu_to_be64(0x0200000000000000ULL)
321 #define IB_CMA_SERVICE_ID	__constant_cpu_to_be64(0x0000000001000000ULL)
322 #define IB_CMA_SERVICE_ID_MASK	__constant_cpu_to_be64(0xFFFFFFFFFF000000ULL)
323 #define IB_SDP_SERVICE_ID	__constant_cpu_to_be64(0x0000000000010000ULL)
324 #define IB_SDP_SERVICE_ID_MASK	__constant_cpu_to_be64(0xFFFFFFFFFFFF0000ULL)
325 
326 struct ib_cm_compare_data {
327 	u8  data[IB_CM_COMPARE_SIZE];
328 	u8  mask[IB_CM_COMPARE_SIZE];
329 };
330 
331 /**
332  * ib_cm_listen - Initiates listening on the specified service ID for
333  *   connection and service ID resolution requests.
334  * @cm_id: Connection identifier associated with the listen request.
335  * @service_id: Service identifier matched against incoming connection
336  *   and service ID resolution requests.  The service ID should be specified
337  *   network-byte order.  If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
338  *   assign a service ID to the caller.
339  * @service_mask: Mask applied to service ID used to listen across a
340  *   range of service IDs.  If set to 0, the service ID is matched
341  *   exactly.  This parameter is ignored if %service_id is set to
342  *   IB_CM_ASSIGN_SERVICE_ID.
343  * @compare_data: This parameter is optional.  It specifies data that must
344  *   appear in the private data of a connection request for the specified
345  *   listen request.
346  */
347 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
348 		 struct ib_cm_compare_data *compare_data);
349 
350 struct ib_cm_req_param {
351 	struct ib_sa_path_rec	*primary_path;
352 	struct ib_sa_path_rec	*alternate_path;
353 	__be64			service_id;
354 	u32			qp_num;
355 	enum ib_qp_type		qp_type;
356 	u32			starting_psn;
357 	const void		*private_data;
358 	u8			private_data_len;
359 	u8			peer_to_peer;
360 	u8			responder_resources;
361 	u8			initiator_depth;
362 	u8			remote_cm_response_timeout;
363 	u8			flow_control;
364 	u8			local_cm_response_timeout;
365 	u8			retry_count;
366 	u8			rnr_retry_count;
367 	u8			max_cm_retries;
368 	u8			srq;
369 };
370 
371 /**
372  * ib_send_cm_req - Sends a connection request to the remote node.
373  * @cm_id: Connection identifier that will be associated with the
374  *   connection request.
375  * @param: Connection request information needed to establish the
376  *   connection.
377  */
378 int ib_send_cm_req(struct ib_cm_id *cm_id,
379 		   struct ib_cm_req_param *param);
380 
381 struct ib_cm_rep_param {
382 	u32		qp_num;
383 	u32		starting_psn;
384 	const void	*private_data;
385 	u8		private_data_len;
386 	u8		responder_resources;
387 	u8		initiator_depth;
388 	u8		failover_accepted;
389 	u8		flow_control;
390 	u8		rnr_retry_count;
391 	u8		srq;
392 };
393 
394 /**
395  * ib_send_cm_rep - Sends a connection reply in response to a connection
396  *   request.
397  * @cm_id: Connection identifier that will be associated with the
398  *   connection request.
399  * @param: Connection reply information needed to establish the
400  *   connection.
401  */
402 int ib_send_cm_rep(struct ib_cm_id *cm_id,
403 		   struct ib_cm_rep_param *param);
404 
405 /**
406  * ib_send_cm_rtu - Sends a connection ready to use message in response
407  *   to a connection reply message.
408  * @cm_id: Connection identifier associated with the connection request.
409  * @private_data: Optional user-defined private data sent with the
410  *   ready to use message.
411  * @private_data_len: Size of the private data buffer, in bytes.
412  */
413 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
414 		   const void *private_data,
415 		   u8 private_data_len);
416 
417 /**
418  * ib_send_cm_dreq - Sends a disconnection request for an existing
419  *   connection.
420  * @cm_id: Connection identifier associated with the connection being
421  *   released.
422  * @private_data: Optional user-defined private data sent with the
423  *   disconnection request message.
424  * @private_data_len: Size of the private data buffer, in bytes.
425  */
426 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
427 		    const void *private_data,
428 		    u8 private_data_len);
429 
430 /**
431  * ib_send_cm_drep - Sends a disconnection reply to a disconnection request.
432  * @cm_id: Connection identifier associated with the connection being
433  *   released.
434  * @private_data: Optional user-defined private data sent with the
435  *   disconnection reply message.
436  * @private_data_len: Size of the private data buffer, in bytes.
437  *
438  * If the cm_id is in the correct state, the CM will transition the connection
439  * to the timewait state, even if an error occurs sending the DREP message.
440  */
441 int ib_send_cm_drep(struct ib_cm_id *cm_id,
442 		    const void *private_data,
443 		    u8 private_data_len);
444 
445 /**
446  * ib_cm_notify - Notifies the CM of an event reported to the consumer.
447  * @cm_id: Connection identifier to transition to established.
448  * @event: Type of event.
449  *
450  * This routine should be invoked by users to notify the CM of relevant
451  * communication events.  Events that should be reported to the CM and
452  * when to report them are:
453  *
454  * IB_EVENT_COMM_EST - Used when a message is received on a connected
455  *    QP before an RTU has been received.
456  * IB_EVENT_PATH_MIG - Notifies the CM that the connection has failed over
457  *   to the alternate path.
458  */
459 int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event);
460 
461 /**
462  * ib_send_cm_rej - Sends a connection rejection message to the
463  *   remote node.
464  * @cm_id: Connection identifier associated with the connection being
465  *   rejected.
466  * @reason: Reason for the connection request rejection.
467  * @ari: Optional additional rejection information.
468  * @ari_length: Size of the additional rejection information, in bytes.
469  * @private_data: Optional user-defined private data sent with the
470  *   rejection message.
471  * @private_data_len: Size of the private data buffer, in bytes.
472  */
473 int ib_send_cm_rej(struct ib_cm_id *cm_id,
474 		   enum ib_cm_rej_reason reason,
475 		   void *ari,
476 		   u8 ari_length,
477 		   const void *private_data,
478 		   u8 private_data_len);
479 
480 #define IB_CM_MRA_FLAG_DELAY 0x80  /* Send MRA only after a duplicate msg */
481 
482 /**
483  * ib_send_cm_mra - Sends a message receipt acknowledgement to a connection
484  *   message.
485  * @cm_id: Connection identifier associated with the connection message.
486  * @service_timeout: The lower 5-bits specify the maximum time required for
487  *   the sender to reply to to the connection message.  The upper 3-bits
488  *   specify additional control flags.
489  * @private_data: Optional user-defined private data sent with the
490  *   message receipt acknowledgement.
491  * @private_data_len: Size of the private data buffer, in bytes.
492  */
493 int ib_send_cm_mra(struct ib_cm_id *cm_id,
494 		   u8 service_timeout,
495 		   const void *private_data,
496 		   u8 private_data_len);
497 
498 /**
499  * ib_send_cm_lap - Sends a load alternate path request.
500  * @cm_id: Connection identifier associated with the load alternate path
501  *   message.
502  * @alternate_path: A path record that identifies the alternate path to
503  *   load.
504  * @private_data: Optional user-defined private data sent with the
505  *   load alternate path message.
506  * @private_data_len: Size of the private data buffer, in bytes.
507  */
508 int ib_send_cm_lap(struct ib_cm_id *cm_id,
509 		   struct ib_sa_path_rec *alternate_path,
510 		   const void *private_data,
511 		   u8 private_data_len);
512 
513 /**
514  * ib_cm_init_qp_attr - Initializes the QP attributes for use in transitioning
515  *   to a specified QP state.
516  * @cm_id: Communication identifier associated with the QP attributes to
517  *   initialize.
518  * @qp_attr: On input, specifies the desired QP state.  On output, the
519  *   mandatory and desired optional attributes will be set in order to
520  *   modify the QP to the specified state.
521  * @qp_attr_mask: The QP attribute mask that may be used to transition the
522  *   QP to the specified state.
523  *
524  * Users must set the @qp_attr->qp_state to the desired QP state.  This call
525  * will set all required attributes for the given transition, along with
526  * known optional attributes.  Users may override the attributes returned from
527  * this call before calling ib_modify_qp.
528  */
529 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
530 		       struct ib_qp_attr *qp_attr,
531 		       int *qp_attr_mask);
532 
533 /**
534  * ib_send_cm_apr - Sends an alternate path response message in response to
535  *   a load alternate path request.
536  * @cm_id: Connection identifier associated with the alternate path response.
537  * @status: Reply status sent with the alternate path response.
538  * @info: Optional additional information sent with the alternate path
539  *   response.
540  * @info_length: Size of the additional information, in bytes.
541  * @private_data: Optional user-defined private data sent with the
542  *   alternate path response message.
543  * @private_data_len: Size of the private data buffer, in bytes.
544  */
545 int ib_send_cm_apr(struct ib_cm_id *cm_id,
546 		   enum ib_cm_apr_status status,
547 		   void *info,
548 		   u8 info_length,
549 		   const void *private_data,
550 		   u8 private_data_len);
551 
552 struct ib_cm_sidr_req_param {
553 	struct ib_sa_path_rec	*path;
554 	__be64			service_id;
555 	int			timeout_ms;
556 	const void		*private_data;
557 	u8			private_data_len;
558 	u8			max_cm_retries;
559 };
560 
561 /**
562  * ib_send_cm_sidr_req - Sends a service ID resolution request to the
563  *   remote node.
564  * @cm_id: Communication identifier that will be associated with the
565  *   service ID resolution request.
566  * @param: Service ID resolution request information.
567  */
568 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
569 			struct ib_cm_sidr_req_param *param);
570 
571 struct ib_cm_sidr_rep_param {
572 	u32			qp_num;
573 	u32			qkey;
574 	enum ib_cm_sidr_status	status;
575 	const void		*info;
576 	u8			info_length;
577 	const void		*private_data;
578 	u8			private_data_len;
579 };
580 
581 /**
582  * ib_send_cm_sidr_rep - Sends a service ID resolution reply to the
583  *   remote node.
584  * @cm_id: Communication identifier associated with the received service ID
585  *   resolution request.
586  * @param: Service ID resolution reply information.
587  */
588 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
589 			struct ib_cm_sidr_rep_param *param);
590 
591 #endif /* IB_CM_H */
592