2 * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 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
23 * disclaimer in the documentation and/or other materials
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
35 * $Id: cm.c 2821 2005-07-08 17:07:28Z sean.hefty $
37 #include <linux/dma-mapping.h>
38 #include <linux/err.h>
39 #include <linux/idr.h>
40 #include <linux/interrupt.h>
41 #include <linux/pci.h>
42 #include <linux/rbtree.h>
43 #include <linux/spinlock.h>
44 #include <linux/workqueue.h>
46 #include <rdma/ib_cache.h>
47 #include <rdma/ib_cm.h>
50 MODULE_AUTHOR("Sean Hefty");
51 MODULE_DESCRIPTION("InfiniBand CM");
52 MODULE_LICENSE("Dual BSD/GPL");
54 static void cm_add_one(struct ib_device
*device
);
55 static void cm_remove_one(struct ib_device
*device
);
57 static struct ib_client cm_client
= {
60 .remove
= cm_remove_one
65 struct list_head device_list
;
67 struct rb_root listen_service_table
;
68 u64 listen_service_id
;
69 /* struct rb_root peer_service_table; todo: fix peer to peer */
70 struct rb_root remote_qp_table
;
71 struct rb_root remote_id_table
;
72 struct rb_root remote_sidr_table
;
73 struct idr local_id_table
;
74 struct workqueue_struct
*wq
;
78 struct cm_device
*cm_dev
;
79 struct ib_mad_agent
*mad_agent
;
84 struct list_head list
;
85 struct ib_device
*device
;
87 struct cm_port port
[0];
93 struct ib_ah_attr ah_attr
;
99 struct work_struct work
;
100 struct list_head list
;
101 struct cm_port
*port
;
102 struct ib_mad_recv_wc
*mad_recv_wc
; /* Received MADs */
103 __be32 local_id
; /* Established / timewait */
105 struct ib_cm_event cm_event
;
106 struct ib_sa_path_rec path
[0];
109 struct cm_timewait_info
{
110 struct cm_work work
; /* Must be first. */
111 struct rb_node remote_qp_node
;
112 struct rb_node remote_id_node
;
113 __be64 remote_ca_guid
;
115 u8 inserted_remote_qp
;
116 u8 inserted_remote_id
;
119 struct cm_id_private
{
122 struct rb_node service_node
;
123 struct rb_node sidr_id_node
;
125 wait_queue_head_t wait
;
128 struct ib_mad_send_buf
*msg
;
129 struct cm_timewait_info
*timewait_info
;
130 /* todo: use alternate port on send failure */
138 enum ib_qp_type qp_type
;
142 enum ib_mtu path_mtu
;
146 u8 responder_resources
;
148 u8 local_ack_timeout
;
153 struct list_head work_list
;
157 static void cm_work_handler(void *data
);
159 static inline void cm_deref_id(struct cm_id_private
*cm_id_priv
)
161 if (atomic_dec_and_test(&cm_id_priv
->refcount
))
162 wake_up(&cm_id_priv
->wait
);
165 static int cm_alloc_msg(struct cm_id_private
*cm_id_priv
,
166 struct ib_mad_send_buf
**msg
)
168 struct ib_mad_agent
*mad_agent
;
169 struct ib_mad_send_buf
*m
;
172 mad_agent
= cm_id_priv
->av
.port
->mad_agent
;
173 ah
= ib_create_ah(mad_agent
->qp
->pd
, &cm_id_priv
->av
.ah_attr
);
177 m
= ib_create_send_mad(mad_agent
, cm_id_priv
->id
.remote_cm_qpn
,
178 cm_id_priv
->av
.pkey_index
,
179 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
186 /* Timeout set by caller if response is expected. */
188 m
->retries
= cm_id_priv
->max_cm_retries
;
190 atomic_inc(&cm_id_priv
->refcount
);
191 m
->context
[0] = cm_id_priv
;
196 static int cm_alloc_response_msg(struct cm_port
*port
,
197 struct ib_mad_recv_wc
*mad_recv_wc
,
198 struct ib_mad_send_buf
**msg
)
200 struct ib_mad_send_buf
*m
;
203 ah
= ib_create_ah_from_wc(port
->mad_agent
->qp
->pd
, mad_recv_wc
->wc
,
204 mad_recv_wc
->recv_buf
.grh
, port
->port_num
);
208 m
= ib_create_send_mad(port
->mad_agent
, 1, mad_recv_wc
->wc
->pkey_index
,
209 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
220 static void cm_free_msg(struct ib_mad_send_buf
*msg
)
222 ib_destroy_ah(msg
->ah
);
224 cm_deref_id(msg
->context
[0]);
225 ib_free_send_mad(msg
);
228 static void * cm_copy_private_data(const void *private_data
,
233 if (!private_data
|| !private_data_len
)
236 data
= kmalloc(private_data_len
, GFP_KERNEL
);
238 return ERR_PTR(-ENOMEM
);
240 memcpy(data
, private_data
, private_data_len
);
244 static void cm_set_private_data(struct cm_id_private
*cm_id_priv
,
245 void *private_data
, u8 private_data_len
)
247 if (cm_id_priv
->private_data
&& cm_id_priv
->private_data_len
)
248 kfree(cm_id_priv
->private_data
);
250 cm_id_priv
->private_data
= private_data
;
251 cm_id_priv
->private_data_len
= private_data_len
;
254 static void cm_set_ah_attr(struct ib_ah_attr
*ah_attr
, u8 port_num
,
255 u16 dlid
, u8 sl
, u16 src_path_bits
)
257 memset(ah_attr
, 0, sizeof ah_attr
);
258 ah_attr
->dlid
= dlid
;
260 ah_attr
->src_path_bits
= src_path_bits
;
261 ah_attr
->port_num
= port_num
;
264 static void cm_init_av_for_response(struct cm_port
*port
,
265 struct ib_wc
*wc
, struct cm_av
*av
)
268 av
->pkey_index
= wc
->pkey_index
;
269 cm_set_ah_attr(&av
->ah_attr
, port
->port_num
, wc
->slid
,
270 wc
->sl
, wc
->dlid_path_bits
);
273 static int cm_init_av_by_path(struct ib_sa_path_rec
*path
, struct cm_av
*av
)
275 struct cm_device
*cm_dev
;
276 struct cm_port
*port
= NULL
;
281 read_lock_irqsave(&cm
.device_lock
, flags
);
282 list_for_each_entry(cm_dev
, &cm
.device_list
, list
) {
283 if (!ib_find_cached_gid(cm_dev
->device
, &path
->sgid
,
285 port
= &cm_dev
->port
[p
-1];
289 read_unlock_irqrestore(&cm
.device_lock
, flags
);
294 ret
= ib_find_cached_pkey(cm_dev
->device
, port
->port_num
,
295 be16_to_cpu(path
->pkey
), &av
->pkey_index
);
300 cm_set_ah_attr(&av
->ah_attr
, av
->port
->port_num
,
301 be16_to_cpu(path
->dlid
), path
->sl
,
302 be16_to_cpu(path
->slid
) & 0x7F);
303 av
->packet_life_time
= path
->packet_life_time
;
307 static int cm_alloc_id(struct cm_id_private
*cm_id_priv
)
313 spin_lock_irqsave(&cm
.lock
, flags
);
314 ret
= idr_get_new_above(&cm
.local_id_table
, cm_id_priv
, 1,
315 (__force
int *) &cm_id_priv
->id
.local_id
);
316 spin_unlock_irqrestore(&cm
.lock
, flags
);
317 } while( (ret
== -EAGAIN
) && idr_pre_get(&cm
.local_id_table
, GFP_KERNEL
) );
321 static void cm_free_id(__be32 local_id
)
325 spin_lock_irqsave(&cm
.lock
, flags
);
326 idr_remove(&cm
.local_id_table
, (__force
int) local_id
);
327 spin_unlock_irqrestore(&cm
.lock
, flags
);
330 static struct cm_id_private
* cm_get_id(__be32 local_id
, __be32 remote_id
)
332 struct cm_id_private
*cm_id_priv
;
334 cm_id_priv
= idr_find(&cm
.local_id_table
, (__force
int) local_id
);
336 if (cm_id_priv
->id
.remote_id
== remote_id
)
337 atomic_inc(&cm_id_priv
->refcount
);
345 static struct cm_id_private
* cm_acquire_id(__be32 local_id
, __be32 remote_id
)
347 struct cm_id_private
*cm_id_priv
;
350 spin_lock_irqsave(&cm
.lock
, flags
);
351 cm_id_priv
= cm_get_id(local_id
, remote_id
);
352 spin_unlock_irqrestore(&cm
.lock
, flags
);
357 static struct cm_id_private
* cm_insert_listen(struct cm_id_private
*cm_id_priv
)
359 struct rb_node
**link
= &cm
.listen_service_table
.rb_node
;
360 struct rb_node
*parent
= NULL
;
361 struct cm_id_private
*cur_cm_id_priv
;
362 __be64 service_id
= cm_id_priv
->id
.service_id
;
363 __be64 service_mask
= cm_id_priv
->id
.service_mask
;
367 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
369 if ((cur_cm_id_priv
->id
.service_mask
& service_id
) ==
370 (service_mask
& cur_cm_id_priv
->id
.service_id
) &&
371 (cm_id_priv
->id
.device
== cur_cm_id_priv
->id
.device
))
372 return cur_cm_id_priv
;
374 if (cm_id_priv
->id
.device
< cur_cm_id_priv
->id
.device
)
375 link
= &(*link
)->rb_left
;
376 else if (cm_id_priv
->id
.device
> cur_cm_id_priv
->id
.device
)
377 link
= &(*link
)->rb_right
;
378 else if (service_id
< cur_cm_id_priv
->id
.service_id
)
379 link
= &(*link
)->rb_left
;
381 link
= &(*link
)->rb_right
;
383 rb_link_node(&cm_id_priv
->service_node
, parent
, link
);
384 rb_insert_color(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
388 static struct cm_id_private
* cm_find_listen(struct ib_device
*device
,
391 struct rb_node
*node
= cm
.listen_service_table
.rb_node
;
392 struct cm_id_private
*cm_id_priv
;
395 cm_id_priv
= rb_entry(node
, struct cm_id_private
, service_node
);
396 if ((cm_id_priv
->id
.service_mask
& service_id
) ==
397 cm_id_priv
->id
.service_id
&&
398 (cm_id_priv
->id
.device
== device
))
401 if (device
< cm_id_priv
->id
.device
)
402 node
= node
->rb_left
;
403 else if (device
> cm_id_priv
->id
.device
)
404 node
= node
->rb_right
;
405 else if (service_id
< cm_id_priv
->id
.service_id
)
406 node
= node
->rb_left
;
408 node
= node
->rb_right
;
413 static struct cm_timewait_info
* cm_insert_remote_id(struct cm_timewait_info
416 struct rb_node
**link
= &cm
.remote_id_table
.rb_node
;
417 struct rb_node
*parent
= NULL
;
418 struct cm_timewait_info
*cur_timewait_info
;
419 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
420 __be32 remote_id
= timewait_info
->work
.remote_id
;
424 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
426 if (remote_id
< cur_timewait_info
->work
.remote_id
)
427 link
= &(*link
)->rb_left
;
428 else if (remote_id
> cur_timewait_info
->work
.remote_id
)
429 link
= &(*link
)->rb_right
;
430 else if (remote_ca_guid
< cur_timewait_info
->remote_ca_guid
)
431 link
= &(*link
)->rb_left
;
432 else if (remote_ca_guid
> cur_timewait_info
->remote_ca_guid
)
433 link
= &(*link
)->rb_right
;
435 return cur_timewait_info
;
437 timewait_info
->inserted_remote_id
= 1;
438 rb_link_node(&timewait_info
->remote_id_node
, parent
, link
);
439 rb_insert_color(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
443 static struct cm_timewait_info
* cm_find_remote_id(__be64 remote_ca_guid
,
446 struct rb_node
*node
= cm
.remote_id_table
.rb_node
;
447 struct cm_timewait_info
*timewait_info
;
450 timewait_info
= rb_entry(node
, struct cm_timewait_info
,
452 if (remote_id
< timewait_info
->work
.remote_id
)
453 node
= node
->rb_left
;
454 else if (remote_id
> timewait_info
->work
.remote_id
)
455 node
= node
->rb_right
;
456 else if (remote_ca_guid
< timewait_info
->remote_ca_guid
)
457 node
= node
->rb_left
;
458 else if (remote_ca_guid
> timewait_info
->remote_ca_guid
)
459 node
= node
->rb_right
;
461 return timewait_info
;
466 static struct cm_timewait_info
* cm_insert_remote_qpn(struct cm_timewait_info
469 struct rb_node
**link
= &cm
.remote_qp_table
.rb_node
;
470 struct rb_node
*parent
= NULL
;
471 struct cm_timewait_info
*cur_timewait_info
;
472 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
473 __be32 remote_qpn
= timewait_info
->remote_qpn
;
477 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
479 if (remote_qpn
< cur_timewait_info
->remote_qpn
)
480 link
= &(*link
)->rb_left
;
481 else if (remote_qpn
> cur_timewait_info
->remote_qpn
)
482 link
= &(*link
)->rb_right
;
483 else if (remote_ca_guid
< cur_timewait_info
->remote_ca_guid
)
484 link
= &(*link
)->rb_left
;
485 else if (remote_ca_guid
> cur_timewait_info
->remote_ca_guid
)
486 link
= &(*link
)->rb_right
;
488 return cur_timewait_info
;
490 timewait_info
->inserted_remote_qp
= 1;
491 rb_link_node(&timewait_info
->remote_qp_node
, parent
, link
);
492 rb_insert_color(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
496 static struct cm_id_private
* cm_insert_remote_sidr(struct cm_id_private
499 struct rb_node
**link
= &cm
.remote_sidr_table
.rb_node
;
500 struct rb_node
*parent
= NULL
;
501 struct cm_id_private
*cur_cm_id_priv
;
502 union ib_gid
*port_gid
= &cm_id_priv
->av
.dgid
;
503 __be32 remote_id
= cm_id_priv
->id
.remote_id
;
507 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
509 if (remote_id
< cur_cm_id_priv
->id
.remote_id
)
510 link
= &(*link
)->rb_left
;
511 else if (remote_id
> cur_cm_id_priv
->id
.remote_id
)
512 link
= &(*link
)->rb_right
;
515 cmp
= memcmp(port_gid
, &cur_cm_id_priv
->av
.dgid
,
518 link
= &(*link
)->rb_left
;
520 link
= &(*link
)->rb_right
;
522 return cur_cm_id_priv
;
525 rb_link_node(&cm_id_priv
->sidr_id_node
, parent
, link
);
526 rb_insert_color(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
530 static void cm_reject_sidr_req(struct cm_id_private
*cm_id_priv
,
531 enum ib_cm_sidr_status status
)
533 struct ib_cm_sidr_rep_param param
;
535 memset(¶m
, 0, sizeof param
);
536 param
.status
= status
;
537 ib_send_cm_sidr_rep(&cm_id_priv
->id
, ¶m
);
540 struct ib_cm_id
*ib_create_cm_id(struct ib_device
*device
,
541 ib_cm_handler cm_handler
,
544 struct cm_id_private
*cm_id_priv
;
547 cm_id_priv
= kzalloc(sizeof *cm_id_priv
, GFP_KERNEL
);
549 return ERR_PTR(-ENOMEM
);
551 cm_id_priv
->id
.state
= IB_CM_IDLE
;
552 cm_id_priv
->id
.device
= device
;
553 cm_id_priv
->id
.cm_handler
= cm_handler
;
554 cm_id_priv
->id
.context
= context
;
555 cm_id_priv
->id
.remote_cm_qpn
= 1;
556 ret
= cm_alloc_id(cm_id_priv
);
560 spin_lock_init(&cm_id_priv
->lock
);
561 init_waitqueue_head(&cm_id_priv
->wait
);
562 INIT_LIST_HEAD(&cm_id_priv
->work_list
);
563 atomic_set(&cm_id_priv
->work_count
, -1);
564 atomic_set(&cm_id_priv
->refcount
, 1);
565 return &cm_id_priv
->id
;
569 return ERR_PTR(-ENOMEM
);
571 EXPORT_SYMBOL(ib_create_cm_id
);
573 static struct cm_work
* cm_dequeue_work(struct cm_id_private
*cm_id_priv
)
575 struct cm_work
*work
;
577 if (list_empty(&cm_id_priv
->work_list
))
580 work
= list_entry(cm_id_priv
->work_list
.next
, struct cm_work
, list
);
581 list_del(&work
->list
);
585 static void cm_free_work(struct cm_work
*work
)
587 if (work
->mad_recv_wc
)
588 ib_free_recv_mad(work
->mad_recv_wc
);
592 static inline int cm_convert_to_ms(int iba_time
)
594 /* approximate conversion to ms from 4.096us x 2^iba_time */
595 return 1 << max(iba_time
- 8, 0);
598 static void cm_cleanup_timewait(struct cm_timewait_info
*timewait_info
)
602 if (!timewait_info
->inserted_remote_id
&&
603 !timewait_info
->inserted_remote_qp
)
606 spin_lock_irqsave(&cm
.lock
, flags
);
607 if (timewait_info
->inserted_remote_id
) {
608 rb_erase(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
609 timewait_info
->inserted_remote_id
= 0;
612 if (timewait_info
->inserted_remote_qp
) {
613 rb_erase(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
614 timewait_info
->inserted_remote_qp
= 0;
616 spin_unlock_irqrestore(&cm
.lock
, flags
);
619 static struct cm_timewait_info
* cm_create_timewait_info(__be32 local_id
)
621 struct cm_timewait_info
*timewait_info
;
623 timewait_info
= kzalloc(sizeof *timewait_info
, GFP_KERNEL
);
625 return ERR_PTR(-ENOMEM
);
627 timewait_info
->work
.local_id
= local_id
;
628 INIT_WORK(&timewait_info
->work
.work
, cm_work_handler
,
629 &timewait_info
->work
);
630 timewait_info
->work
.cm_event
.event
= IB_CM_TIMEWAIT_EXIT
;
631 return timewait_info
;
634 static void cm_enter_timewait(struct cm_id_private
*cm_id_priv
)
639 * The cm_id could be destroyed by the user before we exit timewait.
640 * To protect against this, we search for the cm_id after exiting
641 * timewait before notifying the user that we've exited timewait.
643 cm_id_priv
->id
.state
= IB_CM_TIMEWAIT
;
644 wait_time
= cm_convert_to_ms(cm_id_priv
->local_ack_timeout
);
645 queue_delayed_work(cm
.wq
, &cm_id_priv
->timewait_info
->work
.work
,
646 msecs_to_jiffies(wait_time
));
647 cm_id_priv
->timewait_info
= NULL
;
650 static void cm_reset_to_idle(struct cm_id_private
*cm_id_priv
)
652 cm_id_priv
->id
.state
= IB_CM_IDLE
;
653 if (cm_id_priv
->timewait_info
) {
654 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
655 kfree(cm_id_priv
->timewait_info
);
656 cm_id_priv
->timewait_info
= NULL
;
660 void ib_destroy_cm_id(struct ib_cm_id
*cm_id
)
662 struct cm_id_private
*cm_id_priv
;
663 struct cm_work
*work
;
666 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
668 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
669 switch (cm_id
->state
) {
671 cm_id
->state
= IB_CM_IDLE
;
672 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
673 spin_lock_irqsave(&cm
.lock
, flags
);
674 rb_erase(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
675 spin_unlock_irqrestore(&cm
.lock
, flags
);
677 case IB_CM_SIDR_REQ_SENT
:
678 cm_id
->state
= IB_CM_IDLE
;
679 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
680 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
682 case IB_CM_SIDR_REQ_RCVD
:
683 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
684 cm_reject_sidr_req(cm_id_priv
, IB_SIDR_REJECT
);
687 case IB_CM_MRA_REQ_RCVD
:
689 case IB_CM_MRA_REP_RCVD
:
690 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
693 case IB_CM_MRA_REQ_SENT
:
695 case IB_CM_MRA_REP_SENT
:
696 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
697 ib_send_cm_rej(cm_id
, IB_CM_REJ_TIMEOUT
,
698 &cm_id_priv
->av
.port
->cm_dev
->ca_guid
,
699 sizeof cm_id_priv
->av
.port
->cm_dev
->ca_guid
,
702 case IB_CM_ESTABLISHED
:
703 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
704 ib_send_cm_dreq(cm_id
, NULL
, 0);
706 case IB_CM_DREQ_SENT
:
707 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
708 cm_enter_timewait(cm_id_priv
);
709 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
711 case IB_CM_DREQ_RCVD
:
712 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
713 ib_send_cm_drep(cm_id
, NULL
, 0);
716 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
720 cm_free_id(cm_id
->local_id
);
721 atomic_dec(&cm_id_priv
->refcount
);
722 wait_event(cm_id_priv
->wait
, !atomic_read(&cm_id_priv
->refcount
));
723 while ((work
= cm_dequeue_work(cm_id_priv
)) != NULL
)
725 if (cm_id_priv
->private_data
&& cm_id_priv
->private_data_len
)
726 kfree(cm_id_priv
->private_data
);
729 EXPORT_SYMBOL(ib_destroy_cm_id
);
731 int ib_cm_listen(struct ib_cm_id
*cm_id
,
735 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
739 service_mask
= service_mask
? service_mask
:
740 __constant_cpu_to_be64(~0ULL);
741 service_id
&= service_mask
;
742 if ((service_id
& IB_SERVICE_ID_AGN_MASK
) == IB_CM_ASSIGN_SERVICE_ID
&&
743 (service_id
!= IB_CM_ASSIGN_SERVICE_ID
))
746 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
747 BUG_ON(cm_id
->state
!= IB_CM_IDLE
);
749 cm_id
->state
= IB_CM_LISTEN
;
751 spin_lock_irqsave(&cm
.lock
, flags
);
752 if (service_id
== IB_CM_ASSIGN_SERVICE_ID
) {
753 cm_id
->service_id
= cpu_to_be64(cm
.listen_service_id
++);
754 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
756 cm_id
->service_id
= service_id
;
757 cm_id
->service_mask
= service_mask
;
759 cur_cm_id_priv
= cm_insert_listen(cm_id_priv
);
760 spin_unlock_irqrestore(&cm
.lock
, flags
);
762 if (cur_cm_id_priv
) {
763 cm_id
->state
= IB_CM_IDLE
;
768 EXPORT_SYMBOL(ib_cm_listen
);
770 static __be64
cm_form_tid(struct cm_id_private
*cm_id_priv
,
771 enum cm_msg_sequence msg_seq
)
775 hi_tid
= ((u64
) cm_id_priv
->av
.port
->mad_agent
->hi_tid
) << 32;
776 low_tid
= (u64
) ((__force u32
)cm_id_priv
->id
.local_id
|
778 return cpu_to_be64(hi_tid
| low_tid
);
781 static void cm_format_mad_hdr(struct ib_mad_hdr
*hdr
,
782 __be16 attr_id
, __be64 tid
)
784 hdr
->base_version
= IB_MGMT_BASE_VERSION
;
785 hdr
->mgmt_class
= IB_MGMT_CLASS_CM
;
786 hdr
->class_version
= IB_CM_CLASS_VERSION
;
787 hdr
->method
= IB_MGMT_METHOD_SEND
;
788 hdr
->attr_id
= attr_id
;
792 static void cm_format_req(struct cm_req_msg
*req_msg
,
793 struct cm_id_private
*cm_id_priv
,
794 struct ib_cm_req_param
*param
)
796 cm_format_mad_hdr(&req_msg
->hdr
, CM_REQ_ATTR_ID
,
797 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_REQ
));
799 req_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
800 req_msg
->service_id
= param
->service_id
;
801 req_msg
->local_ca_guid
= cm_id_priv
->av
.port
->cm_dev
->ca_guid
;
802 cm_req_set_local_qpn(req_msg
, cpu_to_be32(param
->qp_num
));
803 cm_req_set_resp_res(req_msg
, param
->responder_resources
);
804 cm_req_set_init_depth(req_msg
, param
->initiator_depth
);
805 cm_req_set_remote_resp_timeout(req_msg
,
806 param
->remote_cm_response_timeout
);
807 cm_req_set_qp_type(req_msg
, param
->qp_type
);
808 cm_req_set_flow_ctrl(req_msg
, param
->flow_control
);
809 cm_req_set_starting_psn(req_msg
, cpu_to_be32(param
->starting_psn
));
810 cm_req_set_local_resp_timeout(req_msg
,
811 param
->local_cm_response_timeout
);
812 cm_req_set_retry_count(req_msg
, param
->retry_count
);
813 req_msg
->pkey
= param
->primary_path
->pkey
;
814 cm_req_set_path_mtu(req_msg
, param
->primary_path
->mtu
);
815 cm_req_set_rnr_retry_count(req_msg
, param
->rnr_retry_count
);
816 cm_req_set_max_cm_retries(req_msg
, param
->max_cm_retries
);
817 cm_req_set_srq(req_msg
, param
->srq
);
819 req_msg
->primary_local_lid
= param
->primary_path
->slid
;
820 req_msg
->primary_remote_lid
= param
->primary_path
->dlid
;
821 req_msg
->primary_local_gid
= param
->primary_path
->sgid
;
822 req_msg
->primary_remote_gid
= param
->primary_path
->dgid
;
823 cm_req_set_primary_flow_label(req_msg
, param
->primary_path
->flow_label
);
824 cm_req_set_primary_packet_rate(req_msg
, param
->primary_path
->rate
);
825 req_msg
->primary_traffic_class
= param
->primary_path
->traffic_class
;
826 req_msg
->primary_hop_limit
= param
->primary_path
->hop_limit
;
827 cm_req_set_primary_sl(req_msg
, param
->primary_path
->sl
);
828 cm_req_set_primary_subnet_local(req_msg
, 1); /* local only... */
829 cm_req_set_primary_local_ack_timeout(req_msg
,
830 min(31, param
->primary_path
->packet_life_time
+ 1));
832 if (param
->alternate_path
) {
833 req_msg
->alt_local_lid
= param
->alternate_path
->slid
;
834 req_msg
->alt_remote_lid
= param
->alternate_path
->dlid
;
835 req_msg
->alt_local_gid
= param
->alternate_path
->sgid
;
836 req_msg
->alt_remote_gid
= param
->alternate_path
->dgid
;
837 cm_req_set_alt_flow_label(req_msg
,
838 param
->alternate_path
->flow_label
);
839 cm_req_set_alt_packet_rate(req_msg
, param
->alternate_path
->rate
);
840 req_msg
->alt_traffic_class
= param
->alternate_path
->traffic_class
;
841 req_msg
->alt_hop_limit
= param
->alternate_path
->hop_limit
;
842 cm_req_set_alt_sl(req_msg
, param
->alternate_path
->sl
);
843 cm_req_set_alt_subnet_local(req_msg
, 1); /* local only... */
844 cm_req_set_alt_local_ack_timeout(req_msg
,
845 min(31, param
->alternate_path
->packet_life_time
+ 1));
848 if (param
->private_data
&& param
->private_data_len
)
849 memcpy(req_msg
->private_data
, param
->private_data
,
850 param
->private_data_len
);
853 static inline int cm_validate_req_param(struct ib_cm_req_param
*param
)
855 /* peer-to-peer not supported */
856 if (param
->peer_to_peer
)
859 if (!param
->primary_path
)
862 if (param
->qp_type
!= IB_QPT_RC
&& param
->qp_type
!= IB_QPT_UC
)
865 if (param
->private_data
&&
866 param
->private_data_len
> IB_CM_REQ_PRIVATE_DATA_SIZE
)
869 if (param
->alternate_path
&&
870 (param
->alternate_path
->pkey
!= param
->primary_path
->pkey
||
871 param
->alternate_path
->mtu
!= param
->primary_path
->mtu
))
877 int ib_send_cm_req(struct ib_cm_id
*cm_id
,
878 struct ib_cm_req_param
*param
)
880 struct cm_id_private
*cm_id_priv
;
881 struct cm_req_msg
*req_msg
;
885 ret
= cm_validate_req_param(param
);
889 /* Verify that we're not in timewait. */
890 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
891 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
892 if (cm_id
->state
!= IB_CM_IDLE
) {
893 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
897 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
899 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
901 if (IS_ERR(cm_id_priv
->timewait_info
))
904 ret
= cm_init_av_by_path(param
->primary_path
, &cm_id_priv
->av
);
907 if (param
->alternate_path
) {
908 ret
= cm_init_av_by_path(param
->alternate_path
,
909 &cm_id_priv
->alt_av
);
913 cm_id
->service_id
= param
->service_id
;
914 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
915 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
916 param
->primary_path
->packet_life_time
) * 2 +
918 param
->remote_cm_response_timeout
);
919 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
920 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
921 cm_id_priv
->responder_resources
= param
->responder_resources
;
922 cm_id_priv
->retry_count
= param
->retry_count
;
923 cm_id_priv
->path_mtu
= param
->primary_path
->mtu
;
924 cm_id_priv
->qp_type
= param
->qp_type
;
926 ret
= cm_alloc_msg(cm_id_priv
, &cm_id_priv
->msg
);
930 req_msg
= (struct cm_req_msg
*) cm_id_priv
->msg
->mad
;
931 cm_format_req(req_msg
, cm_id_priv
, param
);
932 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
933 cm_id_priv
->msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
934 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long) IB_CM_REQ_SENT
;
936 cm_id_priv
->local_qpn
= cm_req_get_local_qpn(req_msg
);
937 cm_id_priv
->rq_psn
= cm_req_get_starting_psn(req_msg
);
938 cm_id_priv
->local_ack_timeout
=
939 cm_req_get_primary_local_ack_timeout(req_msg
);
941 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
942 ret
= ib_post_send_mad(cm_id_priv
->msg
, NULL
);
944 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
947 BUG_ON(cm_id
->state
!= IB_CM_IDLE
);
948 cm_id
->state
= IB_CM_REQ_SENT
;
949 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
952 error2
: cm_free_msg(cm_id_priv
->msg
);
953 error1
: kfree(cm_id_priv
->timewait_info
);
956 EXPORT_SYMBOL(ib_send_cm_req
);
958 static int cm_issue_rej(struct cm_port
*port
,
959 struct ib_mad_recv_wc
*mad_recv_wc
,
960 enum ib_cm_rej_reason reason
,
961 enum cm_msg_response msg_rejected
,
962 void *ari
, u8 ari_length
)
964 struct ib_mad_send_buf
*msg
= NULL
;
965 struct cm_rej_msg
*rej_msg
, *rcv_msg
;
968 ret
= cm_alloc_response_msg(port
, mad_recv_wc
, &msg
);
972 /* We just need common CM header information. Cast to any message. */
973 rcv_msg
= (struct cm_rej_msg
*) mad_recv_wc
->recv_buf
.mad
;
974 rej_msg
= (struct cm_rej_msg
*) msg
->mad
;
976 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, rcv_msg
->hdr
.tid
);
977 rej_msg
->remote_comm_id
= rcv_msg
->local_comm_id
;
978 rej_msg
->local_comm_id
= rcv_msg
->remote_comm_id
;
979 cm_rej_set_msg_rejected(rej_msg
, msg_rejected
);
980 rej_msg
->reason
= cpu_to_be16(reason
);
982 if (ari
&& ari_length
) {
983 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
984 memcpy(rej_msg
->ari
, ari
, ari_length
);
987 ret
= ib_post_send_mad(msg
, NULL
);
994 static inline int cm_is_active_peer(__be64 local_ca_guid
, __be64 remote_ca_guid
,
995 __be32 local_qpn
, __be32 remote_qpn
)
997 return (be64_to_cpu(local_ca_guid
) > be64_to_cpu(remote_ca_guid
) ||
998 ((local_ca_guid
== remote_ca_guid
) &&
999 (be32_to_cpu(local_qpn
) > be32_to_cpu(remote_qpn
))));
1002 static inline void cm_format_paths_from_req(struct cm_req_msg
*req_msg
,
1003 struct ib_sa_path_rec
*primary_path
,
1004 struct ib_sa_path_rec
*alt_path
)
1006 memset(primary_path
, 0, sizeof *primary_path
);
1007 primary_path
->dgid
= req_msg
->primary_local_gid
;
1008 primary_path
->sgid
= req_msg
->primary_remote_gid
;
1009 primary_path
->dlid
= req_msg
->primary_local_lid
;
1010 primary_path
->slid
= req_msg
->primary_remote_lid
;
1011 primary_path
->flow_label
= cm_req_get_primary_flow_label(req_msg
);
1012 primary_path
->hop_limit
= req_msg
->primary_hop_limit
;
1013 primary_path
->traffic_class
= req_msg
->primary_traffic_class
;
1014 primary_path
->reversible
= 1;
1015 primary_path
->pkey
= req_msg
->pkey
;
1016 primary_path
->sl
= cm_req_get_primary_sl(req_msg
);
1017 primary_path
->mtu_selector
= IB_SA_EQ
;
1018 primary_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1019 primary_path
->rate_selector
= IB_SA_EQ
;
1020 primary_path
->rate
= cm_req_get_primary_packet_rate(req_msg
);
1021 primary_path
->packet_life_time_selector
= IB_SA_EQ
;
1022 primary_path
->packet_life_time
=
1023 cm_req_get_primary_local_ack_timeout(req_msg
);
1024 primary_path
->packet_life_time
-= (primary_path
->packet_life_time
> 0);
1026 if (req_msg
->alt_local_lid
) {
1027 memset(alt_path
, 0, sizeof *alt_path
);
1028 alt_path
->dgid
= req_msg
->alt_local_gid
;
1029 alt_path
->sgid
= req_msg
->alt_remote_gid
;
1030 alt_path
->dlid
= req_msg
->alt_local_lid
;
1031 alt_path
->slid
= req_msg
->alt_remote_lid
;
1032 alt_path
->flow_label
= cm_req_get_alt_flow_label(req_msg
);
1033 alt_path
->hop_limit
= req_msg
->alt_hop_limit
;
1034 alt_path
->traffic_class
= req_msg
->alt_traffic_class
;
1035 alt_path
->reversible
= 1;
1036 alt_path
->pkey
= req_msg
->pkey
;
1037 alt_path
->sl
= cm_req_get_alt_sl(req_msg
);
1038 alt_path
->mtu_selector
= IB_SA_EQ
;
1039 alt_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1040 alt_path
->rate_selector
= IB_SA_EQ
;
1041 alt_path
->rate
= cm_req_get_alt_packet_rate(req_msg
);
1042 alt_path
->packet_life_time_selector
= IB_SA_EQ
;
1043 alt_path
->packet_life_time
=
1044 cm_req_get_alt_local_ack_timeout(req_msg
);
1045 alt_path
->packet_life_time
-= (alt_path
->packet_life_time
> 0);
1049 static void cm_format_req_event(struct cm_work
*work
,
1050 struct cm_id_private
*cm_id_priv
,
1051 struct ib_cm_id
*listen_id
)
1053 struct cm_req_msg
*req_msg
;
1054 struct ib_cm_req_event_param
*param
;
1056 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1057 param
= &work
->cm_event
.param
.req_rcvd
;
1058 param
->listen_id
= listen_id
;
1059 param
->port
= cm_id_priv
->av
.port
->port_num
;
1060 param
->primary_path
= &work
->path
[0];
1061 if (req_msg
->alt_local_lid
)
1062 param
->alternate_path
= &work
->path
[1];
1064 param
->alternate_path
= NULL
;
1065 param
->remote_ca_guid
= req_msg
->local_ca_guid
;
1066 param
->remote_qkey
= be32_to_cpu(req_msg
->local_qkey
);
1067 param
->remote_qpn
= be32_to_cpu(cm_req_get_local_qpn(req_msg
));
1068 param
->qp_type
= cm_req_get_qp_type(req_msg
);
1069 param
->starting_psn
= be32_to_cpu(cm_req_get_starting_psn(req_msg
));
1070 param
->responder_resources
= cm_req_get_init_depth(req_msg
);
1071 param
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1072 param
->local_cm_response_timeout
=
1073 cm_req_get_remote_resp_timeout(req_msg
);
1074 param
->flow_control
= cm_req_get_flow_ctrl(req_msg
);
1075 param
->remote_cm_response_timeout
=
1076 cm_req_get_local_resp_timeout(req_msg
);
1077 param
->retry_count
= cm_req_get_retry_count(req_msg
);
1078 param
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1079 param
->srq
= cm_req_get_srq(req_msg
);
1080 work
->cm_event
.private_data
= &req_msg
->private_data
;
1083 static void cm_process_work(struct cm_id_private
*cm_id_priv
,
1084 struct cm_work
*work
)
1086 unsigned long flags
;
1089 /* We will typically only have the current event to report. */
1090 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &work
->cm_event
);
1093 while (!ret
&& !atomic_add_negative(-1, &cm_id_priv
->work_count
)) {
1094 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1095 work
= cm_dequeue_work(cm_id_priv
);
1096 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1098 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
,
1102 cm_deref_id(cm_id_priv
);
1104 ib_destroy_cm_id(&cm_id_priv
->id
);
1107 static void cm_format_mra(struct cm_mra_msg
*mra_msg
,
1108 struct cm_id_private
*cm_id_priv
,
1109 enum cm_msg_response msg_mraed
, u8 service_timeout
,
1110 const void *private_data
, u8 private_data_len
)
1112 cm_format_mad_hdr(&mra_msg
->hdr
, CM_MRA_ATTR_ID
, cm_id_priv
->tid
);
1113 cm_mra_set_msg_mraed(mra_msg
, msg_mraed
);
1114 mra_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1115 mra_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1116 cm_mra_set_service_timeout(mra_msg
, service_timeout
);
1118 if (private_data
&& private_data_len
)
1119 memcpy(mra_msg
->private_data
, private_data
, private_data_len
);
1122 static void cm_format_rej(struct cm_rej_msg
*rej_msg
,
1123 struct cm_id_private
*cm_id_priv
,
1124 enum ib_cm_rej_reason reason
,
1127 const void *private_data
,
1128 u8 private_data_len
)
1130 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, cm_id_priv
->tid
);
1131 rej_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1133 switch(cm_id_priv
->id
.state
) {
1134 case IB_CM_REQ_RCVD
:
1135 rej_msg
->local_comm_id
= 0;
1136 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1138 case IB_CM_MRA_REQ_SENT
:
1139 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1140 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1142 case IB_CM_REP_RCVD
:
1143 case IB_CM_MRA_REP_SENT
:
1144 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1145 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REP
);
1148 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1149 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_OTHER
);
1153 rej_msg
->reason
= cpu_to_be16(reason
);
1154 if (ari
&& ari_length
) {
1155 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1156 memcpy(rej_msg
->ari
, ari
, ari_length
);
1159 if (private_data
&& private_data_len
)
1160 memcpy(rej_msg
->private_data
, private_data
, private_data_len
);
1163 static void cm_dup_req_handler(struct cm_work
*work
,
1164 struct cm_id_private
*cm_id_priv
)
1166 struct ib_mad_send_buf
*msg
= NULL
;
1167 unsigned long flags
;
1170 /* Quick state check to discard duplicate REQs. */
1171 if (cm_id_priv
->id
.state
== IB_CM_REQ_RCVD
)
1174 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1178 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1179 switch (cm_id_priv
->id
.state
) {
1180 case IB_CM_MRA_REQ_SENT
:
1181 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1182 CM_MSG_RESPONSE_REQ
, cm_id_priv
->service_timeout
,
1183 cm_id_priv
->private_data
,
1184 cm_id_priv
->private_data_len
);
1186 case IB_CM_TIMEWAIT
:
1187 cm_format_rej((struct cm_rej_msg
*) msg
->mad
, cm_id_priv
,
1188 IB_CM_REJ_STALE_CONN
, NULL
, 0, NULL
, 0);
1193 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1195 ret
= ib_post_send_mad(msg
, NULL
);
1200 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1201 free
: cm_free_msg(msg
);
1204 static struct cm_id_private
* cm_match_req(struct cm_work
*work
,
1205 struct cm_id_private
*cm_id_priv
)
1207 struct cm_id_private
*listen_cm_id_priv
, *cur_cm_id_priv
;
1208 struct cm_timewait_info
*timewait_info
;
1209 struct cm_req_msg
*req_msg
;
1210 unsigned long flags
;
1212 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1214 /* Check for duplicate REQ and stale connections. */
1215 spin_lock_irqsave(&cm
.lock
, flags
);
1216 timewait_info
= cm_insert_remote_id(cm_id_priv
->timewait_info
);
1218 timewait_info
= cm_insert_remote_qpn(cm_id_priv
->timewait_info
);
1220 if (timewait_info
) {
1221 cur_cm_id_priv
= cm_get_id(timewait_info
->work
.local_id
,
1222 timewait_info
->work
.remote_id
);
1223 spin_unlock_irqrestore(&cm
.lock
, flags
);
1224 if (cur_cm_id_priv
) {
1225 cm_dup_req_handler(work
, cur_cm_id_priv
);
1226 cm_deref_id(cur_cm_id_priv
);
1228 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1229 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REQ
,
1234 /* Find matching listen request. */
1235 listen_cm_id_priv
= cm_find_listen(cm_id_priv
->id
.device
,
1236 req_msg
->service_id
);
1237 if (!listen_cm_id_priv
) {
1238 spin_unlock_irqrestore(&cm
.lock
, flags
);
1239 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1240 IB_CM_REJ_INVALID_SERVICE_ID
, CM_MSG_RESPONSE_REQ
,
1244 atomic_inc(&listen_cm_id_priv
->refcount
);
1245 atomic_inc(&cm_id_priv
->refcount
);
1246 cm_id_priv
->id
.state
= IB_CM_REQ_RCVD
;
1247 atomic_inc(&cm_id_priv
->work_count
);
1248 spin_unlock_irqrestore(&cm
.lock
, flags
);
1249 return listen_cm_id_priv
;
1251 error
: cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1255 static int cm_req_handler(struct cm_work
*work
)
1257 struct ib_cm_id
*cm_id
;
1258 struct cm_id_private
*cm_id_priv
, *listen_cm_id_priv
;
1259 struct cm_req_msg
*req_msg
;
1262 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1264 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->device
, NULL
, NULL
);
1266 return PTR_ERR(cm_id
);
1268 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1269 cm_id_priv
->id
.remote_id
= req_msg
->local_comm_id
;
1270 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
1272 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
1274 if (IS_ERR(cm_id_priv
->timewait_info
)) {
1275 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
1278 cm_id_priv
->timewait_info
->work
.remote_id
= req_msg
->local_comm_id
;
1279 cm_id_priv
->timewait_info
->remote_ca_guid
= req_msg
->local_ca_guid
;
1280 cm_id_priv
->timewait_info
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1282 listen_cm_id_priv
= cm_match_req(work
, cm_id_priv
);
1283 if (!listen_cm_id_priv
) {
1288 cm_id_priv
->id
.cm_handler
= listen_cm_id_priv
->id
.cm_handler
;
1289 cm_id_priv
->id
.context
= listen_cm_id_priv
->id
.context
;
1290 cm_id_priv
->id
.service_id
= req_msg
->service_id
;
1291 cm_id_priv
->id
.service_mask
= __constant_cpu_to_be64(~0ULL);
1293 cm_format_paths_from_req(req_msg
, &work
->path
[0], &work
->path
[1]);
1294 ret
= cm_init_av_by_path(&work
->path
[0], &cm_id_priv
->av
);
1297 if (req_msg
->alt_local_lid
) {
1298 ret
= cm_init_av_by_path(&work
->path
[1], &cm_id_priv
->alt_av
);
1302 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1303 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1304 cm_req_get_local_resp_timeout(req_msg
));
1305 cm_id_priv
->max_cm_retries
= cm_req_get_max_cm_retries(req_msg
);
1306 cm_id_priv
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1307 cm_id_priv
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1308 cm_id_priv
->responder_resources
= cm_req_get_init_depth(req_msg
);
1309 cm_id_priv
->path_mtu
= cm_req_get_path_mtu(req_msg
);
1310 cm_id_priv
->sq_psn
= cm_req_get_starting_psn(req_msg
);
1311 cm_id_priv
->local_ack_timeout
=
1312 cm_req_get_primary_local_ack_timeout(req_msg
);
1313 cm_id_priv
->retry_count
= cm_req_get_retry_count(req_msg
);
1314 cm_id_priv
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1315 cm_id_priv
->qp_type
= cm_req_get_qp_type(req_msg
);
1317 cm_format_req_event(work
, cm_id_priv
, &listen_cm_id_priv
->id
);
1318 cm_process_work(cm_id_priv
, work
);
1319 cm_deref_id(listen_cm_id_priv
);
1322 error3
: atomic_dec(&cm_id_priv
->refcount
);
1323 cm_deref_id(listen_cm_id_priv
);
1324 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1325 error2
: kfree(cm_id_priv
->timewait_info
);
1326 cm_id_priv
->timewait_info
= NULL
;
1327 error1
: ib_destroy_cm_id(&cm_id_priv
->id
);
1331 static void cm_format_rep(struct cm_rep_msg
*rep_msg
,
1332 struct cm_id_private
*cm_id_priv
,
1333 struct ib_cm_rep_param
*param
)
1335 cm_format_mad_hdr(&rep_msg
->hdr
, CM_REP_ATTR_ID
, cm_id_priv
->tid
);
1336 rep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1337 rep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1338 cm_rep_set_local_qpn(rep_msg
, cpu_to_be32(param
->qp_num
));
1339 cm_rep_set_starting_psn(rep_msg
, cpu_to_be32(param
->starting_psn
));
1340 rep_msg
->resp_resources
= param
->responder_resources
;
1341 rep_msg
->initiator_depth
= param
->initiator_depth
;
1342 cm_rep_set_target_ack_delay(rep_msg
, param
->target_ack_delay
);
1343 cm_rep_set_failover(rep_msg
, param
->failover_accepted
);
1344 cm_rep_set_flow_ctrl(rep_msg
, param
->flow_control
);
1345 cm_rep_set_rnr_retry_count(rep_msg
, param
->rnr_retry_count
);
1346 cm_rep_set_srq(rep_msg
, param
->srq
);
1347 rep_msg
->local_ca_guid
= cm_id_priv
->av
.port
->cm_dev
->ca_guid
;
1349 if (param
->private_data
&& param
->private_data_len
)
1350 memcpy(rep_msg
->private_data
, param
->private_data
,
1351 param
->private_data_len
);
1354 int ib_send_cm_rep(struct ib_cm_id
*cm_id
,
1355 struct ib_cm_rep_param
*param
)
1357 struct cm_id_private
*cm_id_priv
;
1358 struct ib_mad_send_buf
*msg
;
1359 struct cm_rep_msg
*rep_msg
;
1360 unsigned long flags
;
1363 if (param
->private_data
&&
1364 param
->private_data_len
> IB_CM_REP_PRIVATE_DATA_SIZE
)
1367 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1368 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1369 if (cm_id
->state
!= IB_CM_REQ_RCVD
&&
1370 cm_id
->state
!= IB_CM_MRA_REQ_SENT
) {
1375 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1379 rep_msg
= (struct cm_rep_msg
*) msg
->mad
;
1380 cm_format_rep(rep_msg
, cm_id_priv
, param
);
1381 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1382 msg
->context
[1] = (void *) (unsigned long) IB_CM_REP_SENT
;
1384 ret
= ib_post_send_mad(msg
, NULL
);
1386 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1391 cm_id
->state
= IB_CM_REP_SENT
;
1392 cm_id_priv
->msg
= msg
;
1393 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1394 cm_id_priv
->responder_resources
= param
->responder_resources
;
1395 cm_id_priv
->rq_psn
= cm_rep_get_starting_psn(rep_msg
);
1396 cm_id_priv
->local_qpn
= cm_rep_get_local_qpn(rep_msg
);
1398 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1401 EXPORT_SYMBOL(ib_send_cm_rep
);
1403 static void cm_format_rtu(struct cm_rtu_msg
*rtu_msg
,
1404 struct cm_id_private
*cm_id_priv
,
1405 const void *private_data
,
1406 u8 private_data_len
)
1408 cm_format_mad_hdr(&rtu_msg
->hdr
, CM_RTU_ATTR_ID
, cm_id_priv
->tid
);
1409 rtu_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1410 rtu_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1412 if (private_data
&& private_data_len
)
1413 memcpy(rtu_msg
->private_data
, private_data
, private_data_len
);
1416 int ib_send_cm_rtu(struct ib_cm_id
*cm_id
,
1417 const void *private_data
,
1418 u8 private_data_len
)
1420 struct cm_id_private
*cm_id_priv
;
1421 struct ib_mad_send_buf
*msg
;
1422 unsigned long flags
;
1426 if (private_data
&& private_data_len
> IB_CM_RTU_PRIVATE_DATA_SIZE
)
1429 data
= cm_copy_private_data(private_data
, private_data_len
);
1431 return PTR_ERR(data
);
1433 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1434 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1435 if (cm_id
->state
!= IB_CM_REP_RCVD
&&
1436 cm_id
->state
!= IB_CM_MRA_REP_SENT
) {
1441 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1445 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1446 private_data
, private_data_len
);
1448 ret
= ib_post_send_mad(msg
, NULL
);
1450 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1456 cm_id
->state
= IB_CM_ESTABLISHED
;
1457 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1458 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1461 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1465 EXPORT_SYMBOL(ib_send_cm_rtu
);
1467 static void cm_format_rep_event(struct cm_work
*work
)
1469 struct cm_rep_msg
*rep_msg
;
1470 struct ib_cm_rep_event_param
*param
;
1472 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1473 param
= &work
->cm_event
.param
.rep_rcvd
;
1474 param
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1475 param
->remote_qkey
= be32_to_cpu(rep_msg
->local_qkey
);
1476 param
->remote_qpn
= be32_to_cpu(cm_rep_get_local_qpn(rep_msg
));
1477 param
->starting_psn
= be32_to_cpu(cm_rep_get_starting_psn(rep_msg
));
1478 param
->responder_resources
= rep_msg
->initiator_depth
;
1479 param
->initiator_depth
= rep_msg
->resp_resources
;
1480 param
->target_ack_delay
= cm_rep_get_target_ack_delay(rep_msg
);
1481 param
->failover_accepted
= cm_rep_get_failover(rep_msg
);
1482 param
->flow_control
= cm_rep_get_flow_ctrl(rep_msg
);
1483 param
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1484 param
->srq
= cm_rep_get_srq(rep_msg
);
1485 work
->cm_event
.private_data
= &rep_msg
->private_data
;
1488 static void cm_dup_rep_handler(struct cm_work
*work
)
1490 struct cm_id_private
*cm_id_priv
;
1491 struct cm_rep_msg
*rep_msg
;
1492 struct ib_mad_send_buf
*msg
= NULL
;
1493 unsigned long flags
;
1496 rep_msg
= (struct cm_rep_msg
*) work
->mad_recv_wc
->recv_buf
.mad
;
1497 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
,
1498 rep_msg
->local_comm_id
);
1502 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1506 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1507 if (cm_id_priv
->id
.state
== IB_CM_ESTABLISHED
)
1508 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1509 cm_id_priv
->private_data
,
1510 cm_id_priv
->private_data_len
);
1511 else if (cm_id_priv
->id
.state
== IB_CM_MRA_REP_SENT
)
1512 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1513 CM_MSG_RESPONSE_REP
, cm_id_priv
->service_timeout
,
1514 cm_id_priv
->private_data
,
1515 cm_id_priv
->private_data_len
);
1518 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1520 ret
= ib_post_send_mad(msg
, NULL
);
1525 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1526 free
: cm_free_msg(msg
);
1527 deref
: cm_deref_id(cm_id_priv
);
1530 static int cm_rep_handler(struct cm_work
*work
)
1532 struct cm_id_private
*cm_id_priv
;
1533 struct cm_rep_msg
*rep_msg
;
1534 unsigned long flags
;
1537 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1538 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
, 0);
1540 cm_dup_rep_handler(work
);
1544 cm_id_priv
->timewait_info
->work
.remote_id
= rep_msg
->local_comm_id
;
1545 cm_id_priv
->timewait_info
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1546 cm_id_priv
->timewait_info
->remote_qpn
= cm_rep_get_local_qpn(rep_msg
);
1548 spin_lock_irqsave(&cm
.lock
, flags
);
1549 /* Check for duplicate REP. */
1550 if (cm_insert_remote_id(cm_id_priv
->timewait_info
)) {
1551 spin_unlock_irqrestore(&cm
.lock
, flags
);
1555 /* Check for a stale connection. */
1556 if (cm_insert_remote_qpn(cm_id_priv
->timewait_info
)) {
1557 spin_unlock_irqrestore(&cm
.lock
, flags
);
1558 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1559 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REP
,
1564 spin_unlock_irqrestore(&cm
.lock
, flags
);
1566 cm_format_rep_event(work
);
1568 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1569 switch (cm_id_priv
->id
.state
) {
1570 case IB_CM_REQ_SENT
:
1571 case IB_CM_MRA_REQ_RCVD
:
1574 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1578 cm_id_priv
->id
.state
= IB_CM_REP_RCVD
;
1579 cm_id_priv
->id
.remote_id
= rep_msg
->local_comm_id
;
1580 cm_id_priv
->remote_qpn
= cm_rep_get_local_qpn(rep_msg
);
1581 cm_id_priv
->initiator_depth
= rep_msg
->resp_resources
;
1582 cm_id_priv
->responder_resources
= rep_msg
->initiator_depth
;
1583 cm_id_priv
->sq_psn
= cm_rep_get_starting_psn(rep_msg
);
1584 cm_id_priv
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1586 /* todo: handle peer_to_peer */
1588 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1589 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1591 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1592 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1595 cm_process_work(cm_id_priv
, work
);
1597 cm_deref_id(cm_id_priv
);
1600 error
: cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1601 cm_deref_id(cm_id_priv
);
1605 static int cm_establish_handler(struct cm_work
*work
)
1607 struct cm_id_private
*cm_id_priv
;
1608 unsigned long flags
;
1611 /* See comment in ib_cm_establish about lookup. */
1612 cm_id_priv
= cm_acquire_id(work
->local_id
, work
->remote_id
);
1616 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1617 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
) {
1618 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1622 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1623 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1625 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1626 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1629 cm_process_work(cm_id_priv
, work
);
1631 cm_deref_id(cm_id_priv
);
1634 cm_deref_id(cm_id_priv
);
1638 static int cm_rtu_handler(struct cm_work
*work
)
1640 struct cm_id_private
*cm_id_priv
;
1641 struct cm_rtu_msg
*rtu_msg
;
1642 unsigned long flags
;
1645 rtu_msg
= (struct cm_rtu_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1646 cm_id_priv
= cm_acquire_id(rtu_msg
->remote_comm_id
,
1647 rtu_msg
->local_comm_id
);
1651 work
->cm_event
.private_data
= &rtu_msg
->private_data
;
1653 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1654 if (cm_id_priv
->id
.state
!= IB_CM_REP_SENT
&&
1655 cm_id_priv
->id
.state
!= IB_CM_MRA_REP_RCVD
) {
1656 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1659 cm_id_priv
->id
.state
= IB_CM_ESTABLISHED
;
1661 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1662 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1664 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1665 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1668 cm_process_work(cm_id_priv
, work
);
1670 cm_deref_id(cm_id_priv
);
1673 cm_deref_id(cm_id_priv
);
1677 static void cm_format_dreq(struct cm_dreq_msg
*dreq_msg
,
1678 struct cm_id_private
*cm_id_priv
,
1679 const void *private_data
,
1680 u8 private_data_len
)
1682 cm_format_mad_hdr(&dreq_msg
->hdr
, CM_DREQ_ATTR_ID
,
1683 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_DREQ
));
1684 dreq_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1685 dreq_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1686 cm_dreq_set_remote_qpn(dreq_msg
, cm_id_priv
->remote_qpn
);
1688 if (private_data
&& private_data_len
)
1689 memcpy(dreq_msg
->private_data
, private_data
, private_data_len
);
1692 int ib_send_cm_dreq(struct ib_cm_id
*cm_id
,
1693 const void *private_data
,
1694 u8 private_data_len
)
1696 struct cm_id_private
*cm_id_priv
;
1697 struct ib_mad_send_buf
*msg
;
1698 unsigned long flags
;
1701 if (private_data
&& private_data_len
> IB_CM_DREQ_PRIVATE_DATA_SIZE
)
1704 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1705 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1706 if (cm_id
->state
!= IB_CM_ESTABLISHED
) {
1711 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1713 cm_enter_timewait(cm_id_priv
);
1717 cm_format_dreq((struct cm_dreq_msg
*) msg
->mad
, cm_id_priv
,
1718 private_data
, private_data_len
);
1719 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1720 msg
->context
[1] = (void *) (unsigned long) IB_CM_DREQ_SENT
;
1722 ret
= ib_post_send_mad(msg
, NULL
);
1724 cm_enter_timewait(cm_id_priv
);
1725 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1730 cm_id
->state
= IB_CM_DREQ_SENT
;
1731 cm_id_priv
->msg
= msg
;
1732 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1735 EXPORT_SYMBOL(ib_send_cm_dreq
);
1737 static void cm_format_drep(struct cm_drep_msg
*drep_msg
,
1738 struct cm_id_private
*cm_id_priv
,
1739 const void *private_data
,
1740 u8 private_data_len
)
1742 cm_format_mad_hdr(&drep_msg
->hdr
, CM_DREP_ATTR_ID
, cm_id_priv
->tid
);
1743 drep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1744 drep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1746 if (private_data
&& private_data_len
)
1747 memcpy(drep_msg
->private_data
, private_data
, private_data_len
);
1750 int ib_send_cm_drep(struct ib_cm_id
*cm_id
,
1751 const void *private_data
,
1752 u8 private_data_len
)
1754 struct cm_id_private
*cm_id_priv
;
1755 struct ib_mad_send_buf
*msg
;
1756 unsigned long flags
;
1760 if (private_data
&& private_data_len
> IB_CM_DREP_PRIVATE_DATA_SIZE
)
1763 data
= cm_copy_private_data(private_data
, private_data_len
);
1765 return PTR_ERR(data
);
1767 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1768 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1769 if (cm_id
->state
!= IB_CM_DREQ_RCVD
) {
1770 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1775 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1776 cm_enter_timewait(cm_id_priv
);
1778 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1782 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
1783 private_data
, private_data_len
);
1785 ret
= ib_post_send_mad(msg
, NULL
);
1787 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1792 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1795 EXPORT_SYMBOL(ib_send_cm_drep
);
1797 static int cm_dreq_handler(struct cm_work
*work
)
1799 struct cm_id_private
*cm_id_priv
;
1800 struct cm_dreq_msg
*dreq_msg
;
1801 struct ib_mad_send_buf
*msg
= NULL
;
1802 unsigned long flags
;
1805 dreq_msg
= (struct cm_dreq_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1806 cm_id_priv
= cm_acquire_id(dreq_msg
->remote_comm_id
,
1807 dreq_msg
->local_comm_id
);
1811 work
->cm_event
.private_data
= &dreq_msg
->private_data
;
1813 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1814 if (cm_id_priv
->local_qpn
!= cm_dreq_get_remote_qpn(dreq_msg
))
1817 switch (cm_id_priv
->id
.state
) {
1818 case IB_CM_REP_SENT
:
1819 case IB_CM_DREQ_SENT
:
1820 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1822 case IB_CM_ESTABLISHED
:
1823 case IB_CM_MRA_REP_RCVD
:
1825 case IB_CM_TIMEWAIT
:
1826 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
1829 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
1830 cm_id_priv
->private_data
,
1831 cm_id_priv
->private_data_len
);
1832 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1834 if (ib_post_send_mad(msg
, NULL
))
1840 cm_id_priv
->id
.state
= IB_CM_DREQ_RCVD
;
1841 cm_id_priv
->tid
= dreq_msg
->hdr
.tid
;
1842 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1844 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1845 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1848 cm_process_work(cm_id_priv
, work
);
1850 cm_deref_id(cm_id_priv
);
1853 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1854 deref
: cm_deref_id(cm_id_priv
);
1858 static int cm_drep_handler(struct cm_work
*work
)
1860 struct cm_id_private
*cm_id_priv
;
1861 struct cm_drep_msg
*drep_msg
;
1862 unsigned long flags
;
1865 drep_msg
= (struct cm_drep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1866 cm_id_priv
= cm_acquire_id(drep_msg
->remote_comm_id
,
1867 drep_msg
->local_comm_id
);
1871 work
->cm_event
.private_data
= &drep_msg
->private_data
;
1873 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1874 if (cm_id_priv
->id
.state
!= IB_CM_DREQ_SENT
&&
1875 cm_id_priv
->id
.state
!= IB_CM_DREQ_RCVD
) {
1876 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1879 cm_enter_timewait(cm_id_priv
);
1881 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1882 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1884 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1885 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1888 cm_process_work(cm_id_priv
, work
);
1890 cm_deref_id(cm_id_priv
);
1893 cm_deref_id(cm_id_priv
);
1897 int ib_send_cm_rej(struct ib_cm_id
*cm_id
,
1898 enum ib_cm_rej_reason reason
,
1901 const void *private_data
,
1902 u8 private_data_len
)
1904 struct cm_id_private
*cm_id_priv
;
1905 struct ib_mad_send_buf
*msg
;
1906 unsigned long flags
;
1909 if ((private_data
&& private_data_len
> IB_CM_REJ_PRIVATE_DATA_SIZE
) ||
1910 (ari
&& ari_length
> IB_CM_REJ_ARI_LENGTH
))
1913 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1915 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1916 switch (cm_id
->state
) {
1917 case IB_CM_REQ_SENT
:
1918 case IB_CM_MRA_REQ_RCVD
:
1919 case IB_CM_REQ_RCVD
:
1920 case IB_CM_MRA_REQ_SENT
:
1921 case IB_CM_REP_RCVD
:
1922 case IB_CM_MRA_REP_SENT
:
1923 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1925 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
1926 cm_id_priv
, reason
, ari
, ari_length
,
1927 private_data
, private_data_len
);
1929 cm_reset_to_idle(cm_id_priv
);
1931 case IB_CM_REP_SENT
:
1932 case IB_CM_MRA_REP_RCVD
:
1933 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1935 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
1936 cm_id_priv
, reason
, ari
, ari_length
,
1937 private_data
, private_data_len
);
1939 cm_enter_timewait(cm_id_priv
);
1949 ret
= ib_post_send_mad(msg
, NULL
);
1953 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1956 EXPORT_SYMBOL(ib_send_cm_rej
);
1958 static void cm_format_rej_event(struct cm_work
*work
)
1960 struct cm_rej_msg
*rej_msg
;
1961 struct ib_cm_rej_event_param
*param
;
1963 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1964 param
= &work
->cm_event
.param
.rej_rcvd
;
1965 param
->ari
= rej_msg
->ari
;
1966 param
->ari_length
= cm_rej_get_reject_info_len(rej_msg
);
1967 param
->reason
= __be16_to_cpu(rej_msg
->reason
);
1968 work
->cm_event
.private_data
= &rej_msg
->private_data
;
1971 static struct cm_id_private
* cm_acquire_rejected_id(struct cm_rej_msg
*rej_msg
)
1973 struct cm_timewait_info
*timewait_info
;
1974 struct cm_id_private
*cm_id_priv
;
1975 unsigned long flags
;
1978 remote_id
= rej_msg
->local_comm_id
;
1980 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_TIMEOUT
) {
1981 spin_lock_irqsave(&cm
.lock
, flags
);
1982 timewait_info
= cm_find_remote_id( *((__be64
*) rej_msg
->ari
),
1984 if (!timewait_info
) {
1985 spin_unlock_irqrestore(&cm
.lock
, flags
);
1988 cm_id_priv
= idr_find(&cm
.local_id_table
,
1989 (__force
int) timewait_info
->work
.local_id
);
1991 if (cm_id_priv
->id
.remote_id
== remote_id
)
1992 atomic_inc(&cm_id_priv
->refcount
);
1996 spin_unlock_irqrestore(&cm
.lock
, flags
);
1997 } else if (cm_rej_get_msg_rejected(rej_msg
) == CM_MSG_RESPONSE_REQ
)
1998 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, 0);
2000 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, remote_id
);
2005 static int cm_rej_handler(struct cm_work
*work
)
2007 struct cm_id_private
*cm_id_priv
;
2008 struct cm_rej_msg
*rej_msg
;
2009 unsigned long flags
;
2012 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2013 cm_id_priv
= cm_acquire_rejected_id(rej_msg
);
2017 cm_format_rej_event(work
);
2019 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2020 switch (cm_id_priv
->id
.state
) {
2021 case IB_CM_REQ_SENT
:
2022 case IB_CM_MRA_REQ_RCVD
:
2023 case IB_CM_REP_SENT
:
2024 case IB_CM_MRA_REP_RCVD
:
2025 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2027 case IB_CM_REQ_RCVD
:
2028 case IB_CM_MRA_REQ_SENT
:
2029 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_STALE_CONN
)
2030 cm_enter_timewait(cm_id_priv
);
2032 cm_reset_to_idle(cm_id_priv
);
2034 case IB_CM_DREQ_SENT
:
2035 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2037 case IB_CM_REP_RCVD
:
2038 case IB_CM_MRA_REP_SENT
:
2039 case IB_CM_ESTABLISHED
:
2040 cm_enter_timewait(cm_id_priv
);
2043 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2048 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2050 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2051 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2054 cm_process_work(cm_id_priv
, work
);
2056 cm_deref_id(cm_id_priv
);
2059 cm_deref_id(cm_id_priv
);
2063 int ib_send_cm_mra(struct ib_cm_id
*cm_id
,
2065 const void *private_data
,
2066 u8 private_data_len
)
2068 struct cm_id_private
*cm_id_priv
;
2069 struct ib_mad_send_buf
*msg
;
2071 unsigned long flags
;
2074 if (private_data
&& private_data_len
> IB_CM_MRA_PRIVATE_DATA_SIZE
)
2077 data
= cm_copy_private_data(private_data
, private_data_len
);
2079 return PTR_ERR(data
);
2081 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2083 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2084 switch(cm_id_priv
->id
.state
) {
2085 case IB_CM_REQ_RCVD
:
2086 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2090 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2091 CM_MSG_RESPONSE_REQ
, service_timeout
,
2092 private_data
, private_data_len
);
2093 ret
= ib_post_send_mad(msg
, NULL
);
2096 cm_id
->state
= IB_CM_MRA_REQ_SENT
;
2098 case IB_CM_REP_RCVD
:
2099 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2103 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2104 CM_MSG_RESPONSE_REP
, service_timeout
,
2105 private_data
, private_data_len
);
2106 ret
= ib_post_send_mad(msg
, NULL
);
2109 cm_id
->state
= IB_CM_MRA_REP_SENT
;
2111 case IB_CM_ESTABLISHED
:
2112 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2116 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2117 CM_MSG_RESPONSE_OTHER
, service_timeout
,
2118 private_data
, private_data_len
);
2119 ret
= ib_post_send_mad(msg
, NULL
);
2122 cm_id
->lap_state
= IB_CM_MRA_LAP_SENT
;
2128 cm_id_priv
->service_timeout
= service_timeout
;
2129 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
2130 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2133 error1
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2137 error2
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2142 EXPORT_SYMBOL(ib_send_cm_mra
);
2144 static struct cm_id_private
* cm_acquire_mraed_id(struct cm_mra_msg
*mra_msg
)
2146 switch (cm_mra_get_msg_mraed(mra_msg
)) {
2147 case CM_MSG_RESPONSE_REQ
:
2148 return cm_acquire_id(mra_msg
->remote_comm_id
, 0);
2149 case CM_MSG_RESPONSE_REP
:
2150 case CM_MSG_RESPONSE_OTHER
:
2151 return cm_acquire_id(mra_msg
->remote_comm_id
,
2152 mra_msg
->local_comm_id
);
2158 static int cm_mra_handler(struct cm_work
*work
)
2160 struct cm_id_private
*cm_id_priv
;
2161 struct cm_mra_msg
*mra_msg
;
2162 unsigned long flags
;
2165 mra_msg
= (struct cm_mra_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2166 cm_id_priv
= cm_acquire_mraed_id(mra_msg
);
2170 work
->cm_event
.private_data
= &mra_msg
->private_data
;
2171 work
->cm_event
.param
.mra_rcvd
.service_timeout
=
2172 cm_mra_get_service_timeout(mra_msg
);
2173 timeout
= cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg
)) +
2174 cm_convert_to_ms(cm_id_priv
->av
.packet_life_time
);
2176 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2177 switch (cm_id_priv
->id
.state
) {
2178 case IB_CM_REQ_SENT
:
2179 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REQ
||
2180 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2181 cm_id_priv
->msg
, timeout
))
2183 cm_id_priv
->id
.state
= IB_CM_MRA_REQ_RCVD
;
2185 case IB_CM_REP_SENT
:
2186 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REP
||
2187 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2188 cm_id_priv
->msg
, timeout
))
2190 cm_id_priv
->id
.state
= IB_CM_MRA_REP_RCVD
;
2192 case IB_CM_ESTABLISHED
:
2193 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_OTHER
||
2194 cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
||
2195 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2196 cm_id_priv
->msg
, timeout
))
2198 cm_id_priv
->id
.lap_state
= IB_CM_MRA_LAP_RCVD
;
2204 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long)
2205 cm_id_priv
->id
.state
;
2206 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2208 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2209 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2212 cm_process_work(cm_id_priv
, work
);
2214 cm_deref_id(cm_id_priv
);
2217 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2218 cm_deref_id(cm_id_priv
);
2222 static void cm_format_lap(struct cm_lap_msg
*lap_msg
,
2223 struct cm_id_private
*cm_id_priv
,
2224 struct ib_sa_path_rec
*alternate_path
,
2225 const void *private_data
,
2226 u8 private_data_len
)
2228 cm_format_mad_hdr(&lap_msg
->hdr
, CM_LAP_ATTR_ID
,
2229 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_LAP
));
2230 lap_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2231 lap_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2232 cm_lap_set_remote_qpn(lap_msg
, cm_id_priv
->remote_qpn
);
2233 /* todo: need remote CM response timeout */
2234 cm_lap_set_remote_resp_timeout(lap_msg
, 0x1F);
2235 lap_msg
->alt_local_lid
= alternate_path
->slid
;
2236 lap_msg
->alt_remote_lid
= alternate_path
->dlid
;
2237 lap_msg
->alt_local_gid
= alternate_path
->sgid
;
2238 lap_msg
->alt_remote_gid
= alternate_path
->dgid
;
2239 cm_lap_set_flow_label(lap_msg
, alternate_path
->flow_label
);
2240 cm_lap_set_traffic_class(lap_msg
, alternate_path
->traffic_class
);
2241 lap_msg
->alt_hop_limit
= alternate_path
->hop_limit
;
2242 cm_lap_set_packet_rate(lap_msg
, alternate_path
->rate
);
2243 cm_lap_set_sl(lap_msg
, alternate_path
->sl
);
2244 cm_lap_set_subnet_local(lap_msg
, 1); /* local only... */
2245 cm_lap_set_local_ack_timeout(lap_msg
,
2246 min(31, alternate_path
->packet_life_time
+ 1));
2248 if (private_data
&& private_data_len
)
2249 memcpy(lap_msg
->private_data
, private_data
, private_data_len
);
2252 int ib_send_cm_lap(struct ib_cm_id
*cm_id
,
2253 struct ib_sa_path_rec
*alternate_path
,
2254 const void *private_data
,
2255 u8 private_data_len
)
2257 struct cm_id_private
*cm_id_priv
;
2258 struct ib_mad_send_buf
*msg
;
2259 unsigned long flags
;
2262 if (private_data
&& private_data_len
> IB_CM_LAP_PRIVATE_DATA_SIZE
)
2265 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2266 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2267 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2268 cm_id
->lap_state
!= IB_CM_LAP_IDLE
) {
2273 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2277 cm_format_lap((struct cm_lap_msg
*) msg
->mad
, cm_id_priv
,
2278 alternate_path
, private_data
, private_data_len
);
2279 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2280 msg
->context
[1] = (void *) (unsigned long) IB_CM_ESTABLISHED
;
2282 ret
= ib_post_send_mad(msg
, NULL
);
2284 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2289 cm_id
->lap_state
= IB_CM_LAP_SENT
;
2290 cm_id_priv
->msg
= msg
;
2292 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2295 EXPORT_SYMBOL(ib_send_cm_lap
);
2297 static void cm_format_path_from_lap(struct ib_sa_path_rec
*path
,
2298 struct cm_lap_msg
*lap_msg
)
2300 memset(path
, 0, sizeof *path
);
2301 path
->dgid
= lap_msg
->alt_local_gid
;
2302 path
->sgid
= lap_msg
->alt_remote_gid
;
2303 path
->dlid
= lap_msg
->alt_local_lid
;
2304 path
->slid
= lap_msg
->alt_remote_lid
;
2305 path
->flow_label
= cm_lap_get_flow_label(lap_msg
);
2306 path
->hop_limit
= lap_msg
->alt_hop_limit
;
2307 path
->traffic_class
= cm_lap_get_traffic_class(lap_msg
);
2308 path
->reversible
= 1;
2309 /* pkey is same as in REQ */
2310 path
->sl
= cm_lap_get_sl(lap_msg
);
2311 path
->mtu_selector
= IB_SA_EQ
;
2312 /* mtu is same as in REQ */
2313 path
->rate_selector
= IB_SA_EQ
;
2314 path
->rate
= cm_lap_get_packet_rate(lap_msg
);
2315 path
->packet_life_time_selector
= IB_SA_EQ
;
2316 path
->packet_life_time
= cm_lap_get_local_ack_timeout(lap_msg
);
2317 path
->packet_life_time
-= (path
->packet_life_time
> 0);
2320 static int cm_lap_handler(struct cm_work
*work
)
2322 struct cm_id_private
*cm_id_priv
;
2323 struct cm_lap_msg
*lap_msg
;
2324 struct ib_cm_lap_event_param
*param
;
2325 struct ib_mad_send_buf
*msg
= NULL
;
2326 unsigned long flags
;
2329 /* todo: verify LAP request and send reject APR if invalid. */
2330 lap_msg
= (struct cm_lap_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2331 cm_id_priv
= cm_acquire_id(lap_msg
->remote_comm_id
,
2332 lap_msg
->local_comm_id
);
2336 param
= &work
->cm_event
.param
.lap_rcvd
;
2337 param
->alternate_path
= &work
->path
[0];
2338 cm_format_path_from_lap(param
->alternate_path
, lap_msg
);
2339 work
->cm_event
.private_data
= &lap_msg
->private_data
;
2341 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2342 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
)
2345 switch (cm_id_priv
->id
.lap_state
) {
2346 case IB_CM_LAP_IDLE
:
2348 case IB_CM_MRA_LAP_SENT
:
2349 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
2352 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2353 CM_MSG_RESPONSE_OTHER
,
2354 cm_id_priv
->service_timeout
,
2355 cm_id_priv
->private_data
,
2356 cm_id_priv
->private_data_len
);
2357 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2359 if (ib_post_send_mad(msg
, NULL
))
2366 cm_id_priv
->id
.lap_state
= IB_CM_LAP_RCVD
;
2367 cm_id_priv
->tid
= lap_msg
->hdr
.tid
;
2368 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2370 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2371 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2374 cm_process_work(cm_id_priv
, work
);
2376 cm_deref_id(cm_id_priv
);
2379 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2380 deref
: cm_deref_id(cm_id_priv
);
2384 static void cm_format_apr(struct cm_apr_msg
*apr_msg
,
2385 struct cm_id_private
*cm_id_priv
,
2386 enum ib_cm_apr_status status
,
2389 const void *private_data
,
2390 u8 private_data_len
)
2392 cm_format_mad_hdr(&apr_msg
->hdr
, CM_APR_ATTR_ID
, cm_id_priv
->tid
);
2393 apr_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2394 apr_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2395 apr_msg
->ap_status
= (u8
) status
;
2397 if (info
&& info_length
) {
2398 apr_msg
->info_length
= info_length
;
2399 memcpy(apr_msg
->info
, info
, info_length
);
2402 if (private_data
&& private_data_len
)
2403 memcpy(apr_msg
->private_data
, private_data
, private_data_len
);
2406 int ib_send_cm_apr(struct ib_cm_id
*cm_id
,
2407 enum ib_cm_apr_status status
,
2410 const void *private_data
,
2411 u8 private_data_len
)
2413 struct cm_id_private
*cm_id_priv
;
2414 struct ib_mad_send_buf
*msg
;
2415 unsigned long flags
;
2418 if ((private_data
&& private_data_len
> IB_CM_APR_PRIVATE_DATA_SIZE
) ||
2419 (info
&& info_length
> IB_CM_APR_INFO_LENGTH
))
2422 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2423 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2424 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2425 (cm_id
->lap_state
!= IB_CM_LAP_RCVD
&&
2426 cm_id
->lap_state
!= IB_CM_MRA_LAP_SENT
)) {
2431 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2435 cm_format_apr((struct cm_apr_msg
*) msg
->mad
, cm_id_priv
, status
,
2436 info
, info_length
, private_data
, private_data_len
);
2437 ret
= ib_post_send_mad(msg
, NULL
);
2439 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2444 cm_id
->lap_state
= IB_CM_LAP_IDLE
;
2445 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2448 EXPORT_SYMBOL(ib_send_cm_apr
);
2450 static int cm_apr_handler(struct cm_work
*work
)
2452 struct cm_id_private
*cm_id_priv
;
2453 struct cm_apr_msg
*apr_msg
;
2454 unsigned long flags
;
2457 apr_msg
= (struct cm_apr_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2458 cm_id_priv
= cm_acquire_id(apr_msg
->remote_comm_id
,
2459 apr_msg
->local_comm_id
);
2461 return -EINVAL
; /* Unmatched reply. */
2463 work
->cm_event
.param
.apr_rcvd
.ap_status
= apr_msg
->ap_status
;
2464 work
->cm_event
.param
.apr_rcvd
.apr_info
= &apr_msg
->info
;
2465 work
->cm_event
.param
.apr_rcvd
.info_len
= apr_msg
->info_length
;
2466 work
->cm_event
.private_data
= &apr_msg
->private_data
;
2468 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2469 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
||
2470 (cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
&&
2471 cm_id_priv
->id
.lap_state
!= IB_CM_MRA_LAP_RCVD
)) {
2472 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2475 cm_id_priv
->id
.lap_state
= IB_CM_LAP_IDLE
;
2476 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2477 cm_id_priv
->msg
= NULL
;
2479 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2481 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2482 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2485 cm_process_work(cm_id_priv
, work
);
2487 cm_deref_id(cm_id_priv
);
2490 cm_deref_id(cm_id_priv
);
2494 static int cm_timewait_handler(struct cm_work
*work
)
2496 struct cm_timewait_info
*timewait_info
;
2497 struct cm_id_private
*cm_id_priv
;
2498 unsigned long flags
;
2501 timewait_info
= (struct cm_timewait_info
*)work
;
2502 cm_cleanup_timewait(timewait_info
);
2504 cm_id_priv
= cm_acquire_id(timewait_info
->work
.local_id
,
2505 timewait_info
->work
.remote_id
);
2509 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2510 if (cm_id_priv
->id
.state
!= IB_CM_TIMEWAIT
||
2511 cm_id_priv
->remote_qpn
!= timewait_info
->remote_qpn
) {
2512 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2515 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2516 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2518 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2519 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2522 cm_process_work(cm_id_priv
, work
);
2524 cm_deref_id(cm_id_priv
);
2527 cm_deref_id(cm_id_priv
);
2531 static void cm_format_sidr_req(struct cm_sidr_req_msg
*sidr_req_msg
,
2532 struct cm_id_private
*cm_id_priv
,
2533 struct ib_cm_sidr_req_param
*param
)
2535 cm_format_mad_hdr(&sidr_req_msg
->hdr
, CM_SIDR_REQ_ATTR_ID
,
2536 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_SIDR
));
2537 sidr_req_msg
->request_id
= cm_id_priv
->id
.local_id
;
2538 sidr_req_msg
->pkey
= cpu_to_be16(param
->pkey
);
2539 sidr_req_msg
->service_id
= param
->service_id
;
2541 if (param
->private_data
&& param
->private_data_len
)
2542 memcpy(sidr_req_msg
->private_data
, param
->private_data
,
2543 param
->private_data_len
);
2546 int ib_send_cm_sidr_req(struct ib_cm_id
*cm_id
,
2547 struct ib_cm_sidr_req_param
*param
)
2549 struct cm_id_private
*cm_id_priv
;
2550 struct ib_mad_send_buf
*msg
;
2551 unsigned long flags
;
2554 if (!param
->path
|| (param
->private_data
&&
2555 param
->private_data_len
> IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
))
2558 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2559 ret
= cm_init_av_by_path(param
->path
, &cm_id_priv
->av
);
2563 cm_id
->service_id
= param
->service_id
;
2564 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
2565 cm_id_priv
->timeout_ms
= param
->timeout_ms
;
2566 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
2567 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2571 cm_format_sidr_req((struct cm_sidr_req_msg
*) msg
->mad
, cm_id_priv
,
2573 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2574 msg
->context
[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT
;
2576 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2577 if (cm_id
->state
== IB_CM_IDLE
)
2578 ret
= ib_post_send_mad(msg
, NULL
);
2583 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2587 cm_id
->state
= IB_CM_SIDR_REQ_SENT
;
2588 cm_id_priv
->msg
= msg
;
2589 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2593 EXPORT_SYMBOL(ib_send_cm_sidr_req
);
2595 static void cm_format_sidr_req_event(struct cm_work
*work
,
2596 struct ib_cm_id
*listen_id
)
2598 struct cm_sidr_req_msg
*sidr_req_msg
;
2599 struct ib_cm_sidr_req_event_param
*param
;
2601 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2602 work
->mad_recv_wc
->recv_buf
.mad
;
2603 param
= &work
->cm_event
.param
.sidr_req_rcvd
;
2604 param
->pkey
= __be16_to_cpu(sidr_req_msg
->pkey
);
2605 param
->listen_id
= listen_id
;
2606 param
->port
= work
->port
->port_num
;
2607 work
->cm_event
.private_data
= &sidr_req_msg
->private_data
;
2610 static int cm_sidr_req_handler(struct cm_work
*work
)
2612 struct ib_cm_id
*cm_id
;
2613 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
2614 struct cm_sidr_req_msg
*sidr_req_msg
;
2616 unsigned long flags
;
2618 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->device
, NULL
, NULL
);
2620 return PTR_ERR(cm_id
);
2621 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2623 /* Record SGID/SLID and request ID for lookup. */
2624 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2625 work
->mad_recv_wc
->recv_buf
.mad
;
2626 wc
= work
->mad_recv_wc
->wc
;
2627 cm_id_priv
->av
.dgid
.global
.subnet_prefix
= cpu_to_be64(wc
->slid
);
2628 cm_id_priv
->av
.dgid
.global
.interface_id
= 0;
2629 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
2631 cm_id_priv
->id
.remote_id
= sidr_req_msg
->request_id
;
2632 cm_id_priv
->id
.state
= IB_CM_SIDR_REQ_RCVD
;
2633 cm_id_priv
->tid
= sidr_req_msg
->hdr
.tid
;
2634 atomic_inc(&cm_id_priv
->work_count
);
2636 spin_lock_irqsave(&cm
.lock
, flags
);
2637 cur_cm_id_priv
= cm_insert_remote_sidr(cm_id_priv
);
2638 if (cur_cm_id_priv
) {
2639 spin_unlock_irqrestore(&cm
.lock
, flags
);
2640 goto out
; /* Duplicate message. */
2642 cur_cm_id_priv
= cm_find_listen(cm_id
->device
,
2643 sidr_req_msg
->service_id
);
2644 if (!cur_cm_id_priv
) {
2645 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
2646 spin_unlock_irqrestore(&cm
.lock
, flags
);
2647 /* todo: reply with no match */
2648 goto out
; /* No match. */
2650 atomic_inc(&cur_cm_id_priv
->refcount
);
2651 spin_unlock_irqrestore(&cm
.lock
, flags
);
2653 cm_id_priv
->id
.cm_handler
= cur_cm_id_priv
->id
.cm_handler
;
2654 cm_id_priv
->id
.context
= cur_cm_id_priv
->id
.context
;
2655 cm_id_priv
->id
.service_id
= sidr_req_msg
->service_id
;
2656 cm_id_priv
->id
.service_mask
= __constant_cpu_to_be64(~0ULL);
2658 cm_format_sidr_req_event(work
, &cur_cm_id_priv
->id
);
2659 cm_process_work(cm_id_priv
, work
);
2660 cm_deref_id(cur_cm_id_priv
);
2663 ib_destroy_cm_id(&cm_id_priv
->id
);
2667 static void cm_format_sidr_rep(struct cm_sidr_rep_msg
*sidr_rep_msg
,
2668 struct cm_id_private
*cm_id_priv
,
2669 struct ib_cm_sidr_rep_param
*param
)
2671 cm_format_mad_hdr(&sidr_rep_msg
->hdr
, CM_SIDR_REP_ATTR_ID
,
2673 sidr_rep_msg
->request_id
= cm_id_priv
->id
.remote_id
;
2674 sidr_rep_msg
->status
= param
->status
;
2675 cm_sidr_rep_set_qpn(sidr_rep_msg
, cpu_to_be32(param
->qp_num
));
2676 sidr_rep_msg
->service_id
= cm_id_priv
->id
.service_id
;
2677 sidr_rep_msg
->qkey
= cpu_to_be32(param
->qkey
);
2679 if (param
->info
&& param
->info_length
)
2680 memcpy(sidr_rep_msg
->info
, param
->info
, param
->info_length
);
2682 if (param
->private_data
&& param
->private_data_len
)
2683 memcpy(sidr_rep_msg
->private_data
, param
->private_data
,
2684 param
->private_data_len
);
2687 int ib_send_cm_sidr_rep(struct ib_cm_id
*cm_id
,
2688 struct ib_cm_sidr_rep_param
*param
)
2690 struct cm_id_private
*cm_id_priv
;
2691 struct ib_mad_send_buf
*msg
;
2692 unsigned long flags
;
2695 if ((param
->info
&& param
->info_length
> IB_CM_SIDR_REP_INFO_LENGTH
) ||
2696 (param
->private_data
&&
2697 param
->private_data_len
> IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
))
2700 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2701 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2702 if (cm_id
->state
!= IB_CM_SIDR_REQ_RCVD
) {
2707 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2711 cm_format_sidr_rep((struct cm_sidr_rep_msg
*) msg
->mad
, cm_id_priv
,
2713 ret
= ib_post_send_mad(msg
, NULL
);
2715 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2719 cm_id
->state
= IB_CM_IDLE
;
2720 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2722 spin_lock_irqsave(&cm
.lock
, flags
);
2723 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
2724 spin_unlock_irqrestore(&cm
.lock
, flags
);
2727 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2730 EXPORT_SYMBOL(ib_send_cm_sidr_rep
);
2732 static void cm_format_sidr_rep_event(struct cm_work
*work
)
2734 struct cm_sidr_rep_msg
*sidr_rep_msg
;
2735 struct ib_cm_sidr_rep_event_param
*param
;
2737 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
2738 work
->mad_recv_wc
->recv_buf
.mad
;
2739 param
= &work
->cm_event
.param
.sidr_rep_rcvd
;
2740 param
->status
= sidr_rep_msg
->status
;
2741 param
->qkey
= be32_to_cpu(sidr_rep_msg
->qkey
);
2742 param
->qpn
= be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg
));
2743 param
->info
= &sidr_rep_msg
->info
;
2744 param
->info_len
= sidr_rep_msg
->info_length
;
2745 work
->cm_event
.private_data
= &sidr_rep_msg
->private_data
;
2748 static int cm_sidr_rep_handler(struct cm_work
*work
)
2750 struct cm_sidr_rep_msg
*sidr_rep_msg
;
2751 struct cm_id_private
*cm_id_priv
;
2752 unsigned long flags
;
2754 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
2755 work
->mad_recv_wc
->recv_buf
.mad
;
2756 cm_id_priv
= cm_acquire_id(sidr_rep_msg
->request_id
, 0);
2758 return -EINVAL
; /* Unmatched reply. */
2760 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2761 if (cm_id_priv
->id
.state
!= IB_CM_SIDR_REQ_SENT
) {
2762 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2765 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2766 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2767 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2769 cm_format_sidr_rep_event(work
);
2770 cm_process_work(cm_id_priv
, work
);
2773 cm_deref_id(cm_id_priv
);
2777 static void cm_process_send_error(struct ib_mad_send_buf
*msg
,
2778 enum ib_wc_status wc_status
)
2780 struct cm_id_private
*cm_id_priv
;
2781 struct ib_cm_event cm_event
;
2782 enum ib_cm_state state
;
2783 unsigned long flags
;
2786 memset(&cm_event
, 0, sizeof cm_event
);
2787 cm_id_priv
= msg
->context
[0];
2789 /* Discard old sends or ones without a response. */
2790 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2791 state
= (enum ib_cm_state
) (unsigned long) msg
->context
[1];
2792 if (msg
!= cm_id_priv
->msg
|| state
!= cm_id_priv
->id
.state
)
2796 case IB_CM_REQ_SENT
:
2797 case IB_CM_MRA_REQ_RCVD
:
2798 cm_reset_to_idle(cm_id_priv
);
2799 cm_event
.event
= IB_CM_REQ_ERROR
;
2801 case IB_CM_REP_SENT
:
2802 case IB_CM_MRA_REP_RCVD
:
2803 cm_reset_to_idle(cm_id_priv
);
2804 cm_event
.event
= IB_CM_REP_ERROR
;
2806 case IB_CM_DREQ_SENT
:
2807 cm_enter_timewait(cm_id_priv
);
2808 cm_event
.event
= IB_CM_DREQ_ERROR
;
2810 case IB_CM_SIDR_REQ_SENT
:
2811 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2812 cm_event
.event
= IB_CM_SIDR_REQ_ERROR
;
2817 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2818 cm_event
.param
.send_status
= wc_status
;
2820 /* No other events can occur on the cm_id at this point. */
2821 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &cm_event
);
2824 ib_destroy_cm_id(&cm_id_priv
->id
);
2827 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2831 static void cm_send_handler(struct ib_mad_agent
*mad_agent
,
2832 struct ib_mad_send_wc
*mad_send_wc
)
2834 struct ib_mad_send_buf
*msg
= mad_send_wc
->send_buf
;
2836 switch (mad_send_wc
->status
) {
2838 case IB_WC_WR_FLUSH_ERR
:
2842 if (msg
->context
[0] && msg
->context
[1])
2843 cm_process_send_error(msg
, mad_send_wc
->status
);
2850 static void cm_work_handler(void *data
)
2852 struct cm_work
*work
= data
;
2855 switch (work
->cm_event
.event
) {
2856 case IB_CM_REQ_RECEIVED
:
2857 ret
= cm_req_handler(work
);
2859 case IB_CM_MRA_RECEIVED
:
2860 ret
= cm_mra_handler(work
);
2862 case IB_CM_REJ_RECEIVED
:
2863 ret
= cm_rej_handler(work
);
2865 case IB_CM_REP_RECEIVED
:
2866 ret
= cm_rep_handler(work
);
2868 case IB_CM_RTU_RECEIVED
:
2869 ret
= cm_rtu_handler(work
);
2871 case IB_CM_USER_ESTABLISHED
:
2872 ret
= cm_establish_handler(work
);
2874 case IB_CM_DREQ_RECEIVED
:
2875 ret
= cm_dreq_handler(work
);
2877 case IB_CM_DREP_RECEIVED
:
2878 ret
= cm_drep_handler(work
);
2880 case IB_CM_SIDR_REQ_RECEIVED
:
2881 ret
= cm_sidr_req_handler(work
);
2883 case IB_CM_SIDR_REP_RECEIVED
:
2884 ret
= cm_sidr_rep_handler(work
);
2886 case IB_CM_LAP_RECEIVED
:
2887 ret
= cm_lap_handler(work
);
2889 case IB_CM_APR_RECEIVED
:
2890 ret
= cm_apr_handler(work
);
2892 case IB_CM_TIMEWAIT_EXIT
:
2893 ret
= cm_timewait_handler(work
);
2903 int ib_cm_establish(struct ib_cm_id
*cm_id
)
2905 struct cm_id_private
*cm_id_priv
;
2906 struct cm_work
*work
;
2907 unsigned long flags
;
2910 work
= kmalloc(sizeof *work
, GFP_ATOMIC
);
2914 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2915 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2916 switch (cm_id
->state
)
2918 case IB_CM_REP_SENT
:
2919 case IB_CM_MRA_REP_RCVD
:
2920 cm_id
->state
= IB_CM_ESTABLISHED
;
2922 case IB_CM_ESTABLISHED
:
2929 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2937 * The CM worker thread may try to destroy the cm_id before it
2938 * can execute this work item. To prevent potential deadlock,
2939 * we need to find the cm_id once we're in the context of the
2940 * worker thread, rather than holding a reference on it.
2942 INIT_WORK(&work
->work
, cm_work_handler
, work
);
2943 work
->local_id
= cm_id
->local_id
;
2944 work
->remote_id
= cm_id
->remote_id
;
2945 work
->mad_recv_wc
= NULL
;
2946 work
->cm_event
.event
= IB_CM_USER_ESTABLISHED
;
2947 queue_work(cm
.wq
, &work
->work
);
2951 EXPORT_SYMBOL(ib_cm_establish
);
2953 static void cm_recv_handler(struct ib_mad_agent
*mad_agent
,
2954 struct ib_mad_recv_wc
*mad_recv_wc
)
2956 struct cm_work
*work
;
2957 enum ib_cm_event_type event
;
2960 switch (mad_recv_wc
->recv_buf
.mad
->mad_hdr
.attr_id
) {
2961 case CM_REQ_ATTR_ID
:
2962 paths
= 1 + (((struct cm_req_msg
*) mad_recv_wc
->recv_buf
.mad
)->
2963 alt_local_lid
!= 0);
2964 event
= IB_CM_REQ_RECEIVED
;
2966 case CM_MRA_ATTR_ID
:
2967 event
= IB_CM_MRA_RECEIVED
;
2969 case CM_REJ_ATTR_ID
:
2970 event
= IB_CM_REJ_RECEIVED
;
2972 case CM_REP_ATTR_ID
:
2973 event
= IB_CM_REP_RECEIVED
;
2975 case CM_RTU_ATTR_ID
:
2976 event
= IB_CM_RTU_RECEIVED
;
2978 case CM_DREQ_ATTR_ID
:
2979 event
= IB_CM_DREQ_RECEIVED
;
2981 case CM_DREP_ATTR_ID
:
2982 event
= IB_CM_DREP_RECEIVED
;
2984 case CM_SIDR_REQ_ATTR_ID
:
2985 event
= IB_CM_SIDR_REQ_RECEIVED
;
2987 case CM_SIDR_REP_ATTR_ID
:
2988 event
= IB_CM_SIDR_REP_RECEIVED
;
2990 case CM_LAP_ATTR_ID
:
2992 event
= IB_CM_LAP_RECEIVED
;
2994 case CM_APR_ATTR_ID
:
2995 event
= IB_CM_APR_RECEIVED
;
2998 ib_free_recv_mad(mad_recv_wc
);
3002 work
= kmalloc(sizeof *work
+ sizeof(struct ib_sa_path_rec
) * paths
,
3005 ib_free_recv_mad(mad_recv_wc
);
3009 INIT_WORK(&work
->work
, cm_work_handler
, work
);
3010 work
->cm_event
.event
= event
;
3011 work
->mad_recv_wc
= mad_recv_wc
;
3012 work
->port
= (struct cm_port
*)mad_agent
->context
;
3013 queue_work(cm
.wq
, &work
->work
);
3016 static int cm_init_qp_init_attr(struct cm_id_private
*cm_id_priv
,
3017 struct ib_qp_attr
*qp_attr
,
3020 unsigned long flags
;
3023 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3024 switch (cm_id_priv
->id
.state
) {
3025 case IB_CM_REQ_SENT
:
3026 case IB_CM_MRA_REQ_RCVD
:
3027 case IB_CM_REQ_RCVD
:
3028 case IB_CM_MRA_REQ_SENT
:
3029 case IB_CM_REP_RCVD
:
3030 case IB_CM_MRA_REP_SENT
:
3031 case IB_CM_REP_SENT
:
3032 case IB_CM_MRA_REP_RCVD
:
3033 case IB_CM_ESTABLISHED
:
3034 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
|
3035 IB_QP_PKEY_INDEX
| IB_QP_PORT
;
3036 qp_attr
->qp_access_flags
= IB_ACCESS_LOCAL_WRITE
|
3037 IB_ACCESS_REMOTE_WRITE
;
3038 if (cm_id_priv
->responder_resources
)
3039 qp_attr
->qp_access_flags
|= IB_ACCESS_REMOTE_READ
;
3040 qp_attr
->pkey_index
= cm_id_priv
->av
.pkey_index
;
3041 qp_attr
->port_num
= cm_id_priv
->av
.port
->port_num
;
3048 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3052 static int cm_init_qp_rtr_attr(struct cm_id_private
*cm_id_priv
,
3053 struct ib_qp_attr
*qp_attr
,
3056 unsigned long flags
;
3059 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3060 switch (cm_id_priv
->id
.state
) {
3061 case IB_CM_REQ_RCVD
:
3062 case IB_CM_MRA_REQ_SENT
:
3063 case IB_CM_REP_RCVD
:
3064 case IB_CM_MRA_REP_SENT
:
3065 case IB_CM_REP_SENT
:
3066 case IB_CM_MRA_REP_RCVD
:
3067 case IB_CM_ESTABLISHED
:
3068 *qp_attr_mask
= IB_QP_STATE
| IB_QP_AV
| IB_QP_PATH_MTU
|
3069 IB_QP_DEST_QPN
| IB_QP_RQ_PSN
;
3070 qp_attr
->ah_attr
= cm_id_priv
->av
.ah_attr
;
3071 qp_attr
->path_mtu
= cm_id_priv
->path_mtu
;
3072 qp_attr
->dest_qp_num
= be32_to_cpu(cm_id_priv
->remote_qpn
);
3073 qp_attr
->rq_psn
= be32_to_cpu(cm_id_priv
->rq_psn
);
3074 if (cm_id_priv
->qp_type
== IB_QPT_RC
) {
3075 *qp_attr_mask
|= IB_QP_MAX_DEST_RD_ATOMIC
|
3076 IB_QP_MIN_RNR_TIMER
;
3077 qp_attr
->max_dest_rd_atomic
=
3078 cm_id_priv
->responder_resources
;
3079 qp_attr
->min_rnr_timer
= 0;
3081 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3082 *qp_attr_mask
|= IB_QP_ALT_PATH
;
3083 qp_attr
->alt_ah_attr
= cm_id_priv
->alt_av
.ah_attr
;
3091 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3095 static int cm_init_qp_rts_attr(struct cm_id_private
*cm_id_priv
,
3096 struct ib_qp_attr
*qp_attr
,
3099 unsigned long flags
;
3102 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3103 switch (cm_id_priv
->id
.state
) {
3104 case IB_CM_REP_RCVD
:
3105 case IB_CM_MRA_REP_SENT
:
3106 case IB_CM_REP_SENT
:
3107 case IB_CM_MRA_REP_RCVD
:
3108 case IB_CM_ESTABLISHED
:
3109 *qp_attr_mask
= IB_QP_STATE
| IB_QP_SQ_PSN
;
3110 qp_attr
->sq_psn
= be32_to_cpu(cm_id_priv
->sq_psn
);
3111 if (cm_id_priv
->qp_type
== IB_QPT_RC
) {
3112 *qp_attr_mask
|= IB_QP_TIMEOUT
| IB_QP_RETRY_CNT
|
3114 IB_QP_MAX_QP_RD_ATOMIC
;
3115 qp_attr
->timeout
= cm_id_priv
->local_ack_timeout
;
3116 qp_attr
->retry_cnt
= cm_id_priv
->retry_count
;
3117 qp_attr
->rnr_retry
= cm_id_priv
->rnr_retry_count
;
3118 qp_attr
->max_rd_atomic
= cm_id_priv
->initiator_depth
;
3120 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3121 *qp_attr_mask
|= IB_QP_PATH_MIG_STATE
;
3122 qp_attr
->path_mig_state
= IB_MIG_REARM
;
3130 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3134 int ib_cm_init_qp_attr(struct ib_cm_id
*cm_id
,
3135 struct ib_qp_attr
*qp_attr
,
3138 struct cm_id_private
*cm_id_priv
;
3141 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3142 switch (qp_attr
->qp_state
) {
3144 ret
= cm_init_qp_init_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3147 ret
= cm_init_qp_rtr_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3150 ret
= cm_init_qp_rts_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3158 EXPORT_SYMBOL(ib_cm_init_qp_attr
);
3160 static __be64
cm_get_ca_guid(struct ib_device
*device
)
3162 struct ib_device_attr
*device_attr
;
3166 device_attr
= kmalloc(sizeof *device_attr
, GFP_KERNEL
);
3170 ret
= ib_query_device(device
, device_attr
);
3171 guid
= ret
? 0 : device_attr
->node_guid
;
3176 static void cm_add_one(struct ib_device
*device
)
3178 struct cm_device
*cm_dev
;
3179 struct cm_port
*port
;
3180 struct ib_mad_reg_req reg_req
= {
3181 .mgmt_class
= IB_MGMT_CLASS_CM
,
3182 .mgmt_class_version
= IB_CM_CLASS_VERSION
3184 struct ib_port_modify port_modify
= {
3185 .set_port_cap_mask
= IB_PORT_CM_SUP
3187 unsigned long flags
;
3191 cm_dev
= kmalloc(sizeof(*cm_dev
) + sizeof(*port
) *
3192 device
->phys_port_cnt
, GFP_KERNEL
);
3196 cm_dev
->device
= device
;
3197 cm_dev
->ca_guid
= cm_get_ca_guid(device
);
3198 if (!cm_dev
->ca_guid
)
3201 set_bit(IB_MGMT_METHOD_SEND
, reg_req
.method_mask
);
3202 for (i
= 1; i
<= device
->phys_port_cnt
; i
++) {
3203 port
= &cm_dev
->port
[i
-1];
3204 port
->cm_dev
= cm_dev
;
3206 port
->mad_agent
= ib_register_mad_agent(device
, i
,
3213 if (IS_ERR(port
->mad_agent
))
3216 ret
= ib_modify_port(device
, i
, 0, &port_modify
);
3220 ib_set_client_data(device
, &cm_client
, cm_dev
);
3222 write_lock_irqsave(&cm
.device_lock
, flags
);
3223 list_add_tail(&cm_dev
->list
, &cm
.device_list
);
3224 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3228 ib_unregister_mad_agent(port
->mad_agent
);
3230 port_modify
.set_port_cap_mask
= 0;
3231 port_modify
.clr_port_cap_mask
= IB_PORT_CM_SUP
;
3233 port
= &cm_dev
->port
[i
-1];
3234 ib_modify_port(device
, port
->port_num
, 0, &port_modify
);
3235 ib_unregister_mad_agent(port
->mad_agent
);
3241 static void cm_remove_one(struct ib_device
*device
)
3243 struct cm_device
*cm_dev
;
3244 struct cm_port
*port
;
3245 struct ib_port_modify port_modify
= {
3246 .clr_port_cap_mask
= IB_PORT_CM_SUP
3248 unsigned long flags
;
3251 cm_dev
= ib_get_client_data(device
, &cm_client
);
3255 write_lock_irqsave(&cm
.device_lock
, flags
);
3256 list_del(&cm_dev
->list
);
3257 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3259 for (i
= 1; i
<= device
->phys_port_cnt
; i
++) {
3260 port
= &cm_dev
->port
[i
-1];
3261 ib_modify_port(device
, port
->port_num
, 0, &port_modify
);
3262 ib_unregister_mad_agent(port
->mad_agent
);
3267 static int __init
ib_cm_init(void)
3271 memset(&cm
, 0, sizeof cm
);
3272 INIT_LIST_HEAD(&cm
.device_list
);
3273 rwlock_init(&cm
.device_lock
);
3274 spin_lock_init(&cm
.lock
);
3275 cm
.listen_service_table
= RB_ROOT
;
3276 cm
.listen_service_id
= __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID
);
3277 cm
.remote_id_table
= RB_ROOT
;
3278 cm
.remote_qp_table
= RB_ROOT
;
3279 cm
.remote_sidr_table
= RB_ROOT
;
3280 idr_init(&cm
.local_id_table
);
3281 idr_pre_get(&cm
.local_id_table
, GFP_KERNEL
);
3283 cm
.wq
= create_workqueue("ib_cm");
3287 ret
= ib_register_client(&cm_client
);
3293 destroy_workqueue(cm
.wq
);
3297 static void __exit
ib_cm_cleanup(void)
3299 flush_workqueue(cm
.wq
);
3300 destroy_workqueue(cm
.wq
);
3301 ib_unregister_client(&cm_client
);
3302 idr_destroy(&cm
.local_id_table
);
3305 module_init(ib_cm_init
);
3306 module_exit(ib_cm_cleanup
);