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.
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:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
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24 * provided with the distribution.
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
38 #include <rdma/ib_mad.h>
39 #include <rdma/ib_sa.h>
60 enum ib_cm_lap_state {
69 enum ib_cm_event_type {
75 IB_CM_USER_ESTABLISHED,
86 IB_CM_SIDR_REQ_RECEIVED,
87 IB_CM_SIDR_REP_RECEIVED
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
110 struct ib_cm_req_event_param {
111 struct ib_cm_id *listen_id;
114 struct ib_sa_path_rec *primary_path;
115 struct ib_sa_path_rec *alternate_path;
117 __be64 remote_ca_guid;
120 enum ib_qp_type qp_type;
123 u8 responder_resources;
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;
133 struct ib_cm_rep_event_param {
134 __be64 remote_ca_guid;
138 u8 responder_resources;
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;
147 enum ib_cm_rej_reason {
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
183 struct ib_cm_rej_event_param {
184 enum ib_cm_rej_reason reason;
189 struct ib_cm_mra_event_param {
193 struct ib_cm_lap_event_param {
194 struct ib_sa_path_rec *alternate_path;
197 enum ib_cm_apr_status {
199 IB_CM_APR_INVALID_COMM_ID,
200 IB_CM_APR_UNSUPPORTED,
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,
214 struct ib_cm_apr_event_param {
215 enum ib_cm_apr_status ap_status;
220 struct ib_cm_sidr_req_event_param {
221 struct ib_cm_id *listen_id;
226 enum ib_cm_sidr_status {
232 IB_SIDR_UNSUPPORTED_VERSION
235 struct ib_cm_sidr_rep_event_param {
236 enum ib_cm_sidr_status status;
244 enum ib_cm_event_type event;
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;
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.
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.
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.
278 typedef int (*ib_cm_handler)(struct ib_cm_id *cm_id,
279 struct ib_cm_event *event);
282 ib_cm_handler cm_handler;
284 struct ib_device *device;
287 enum ib_cm_state state; /* internal CM/debug use */
288 enum ib_cm_lap_state lap_state; /* internal CM/debug use */
291 u32 remote_cm_qpn; /* 1 unless redirected */
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
302 * Communication identifiers are used to track connection states, service
303 * ID resolution requests, and listen requests.
305 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
306 ib_cm_handler cm_handler,
310 * ib_destroy_cm_id - Destroy a connection identifier.
311 * @cm_id: Connection identifier to destroy.
313 * This call blocks until the connection identifier is destroyed.
315 void ib_destroy_cm_id(struct ib_cm_id *cm_id);
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)
324 struct ib_cm_compare_data {
325 u8 data[IB_CM_COMPARE_SIZE];
326 u8 mask[IB_CM_COMPARE_SIZE];
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
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);
348 struct ib_cm_req_param {
349 struct ib_sa_path_rec *primary_path;
350 struct ib_sa_path_rec *alternate_path;
353 enum ib_qp_type qp_type;
355 const void *private_data;
358 u8 responder_resources;
360 u8 remote_cm_response_timeout;
362 u8 local_cm_response_timeout;
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
376 int ib_send_cm_req(struct ib_cm_id *cm_id,
377 struct ib_cm_req_param *param);
379 struct ib_cm_rep_param {
382 const void *private_data;
384 u8 responder_resources;
386 u8 failover_accepted;
393 * ib_send_cm_rep - Sends a connection reply in response to a connection
395 * @cm_id: Connection identifier that will be associated with the
396 * connection request.
397 * @param: Connection reply information needed to establish the
400 int ib_send_cm_rep(struct ib_cm_id *cm_id,
401 struct ib_cm_rep_param *param);
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.
411 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
412 const void *private_data,
413 u8 private_data_len);
416 * ib_send_cm_dreq - Sends a disconnection request for an existing
418 * @cm_id: Connection identifier associated with the connection being
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.
424 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
425 const void *private_data,
426 u8 private_data_len);
429 * ib_send_cm_drep - Sends a disconnection reply to a disconnection request.
430 * @cm_id: Connection identifier associated with the connection being
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.
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.
439 int ib_send_cm_drep(struct ib_cm_id *cm_id,
440 const void *private_data,
441 u8 private_data_len);
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.
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:
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.
457 int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event);
460 * ib_send_cm_rej - Sends a connection rejection message to the
462 * @cm_id: Connection identifier associated with the connection being
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
469 * @private_data_len: Size of the private data buffer, in bytes.
471 int ib_send_cm_rej(struct ib_cm_id *cm_id,
472 enum ib_cm_rej_reason reason,
475 const void *private_data,
476 u8 private_data_len);
478 #define IB_CM_MRA_FLAG_DELAY 0x80 /* Send MRA only after a duplicate msg */
481 * ib_send_cm_mra - Sends a message receipt acknowledgement to a connection
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.
491 int ib_send_cm_mra(struct ib_cm_id *cm_id,
493 const void *private_data,
494 u8 private_data_len);
497 * ib_send_cm_lap - Sends a load alternate path request.
498 * @cm_id: Connection identifier associated with the load alternate path
500 * @alternate_path: A path record that identifies the alternate path to
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.
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);
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
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.
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.
527 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
528 struct ib_qp_attr *qp_attr,
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
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.
543 int ib_send_cm_apr(struct ib_cm_id *cm_id,
544 enum ib_cm_apr_status status,
547 const void *private_data,
548 u8 private_data_len);
550 struct ib_cm_sidr_req_param {
551 struct ib_sa_path_rec *path;
554 const void *private_data;
560 * ib_send_cm_sidr_req - Sends a service ID resolution request to the
562 * @cm_id: Communication identifier that will be associated with the
563 * service ID resolution request.
564 * @param: Service ID resolution request information.
566 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
567 struct ib_cm_sidr_req_param *param);
569 struct ib_cm_sidr_rep_param {
572 enum ib_cm_sidr_status status;
575 const void *private_data;
580 * ib_send_cm_sidr_rep - Sends a service ID resolution reply to the
582 * @cm_id: Communication identifier associated with the received service ID
583 * resolution request.
584 * @param: Service ID resolution reply information.
586 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
587 struct ib_cm_sidr_rep_param *param);