2 * Copyright (c) 2004-2006 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 4311 2005-12-05 18:42:01Z sean.hefty $
38 #include <linux/completion.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/err.h>
41 #include <linux/idr.h>
42 #include <linux/interrupt.h>
43 #include <linux/pci.h>
44 #include <linux/random.h>
45 #include <linux/rbtree.h>
46 #include <linux/spinlock.h>
47 #include <linux/workqueue.h>
49 #include <rdma/ib_cache.h>
50 #include <rdma/ib_cm.h>
53 MODULE_AUTHOR("Sean Hefty");
54 MODULE_DESCRIPTION("InfiniBand CM");
55 MODULE_LICENSE("Dual BSD/GPL");
57 static void cm_add_one(struct ib_device
*device
);
58 static void cm_remove_one(struct ib_device
*device
);
60 static struct ib_client cm_client
= {
63 .remove
= cm_remove_one
68 struct list_head device_list
;
70 struct rb_root listen_service_table
;
71 u64 listen_service_id
;
72 /* struct rb_root peer_service_table; todo: fix peer to peer */
73 struct rb_root remote_qp_table
;
74 struct rb_root remote_id_table
;
75 struct rb_root remote_sidr_table
;
76 struct idr local_id_table
;
77 __be32 random_id_operand
;
78 struct workqueue_struct
*wq
;
82 struct cm_device
*cm_dev
;
83 struct ib_mad_agent
*mad_agent
;
88 struct list_head list
;
89 struct ib_device
*device
;
91 struct cm_port port
[0];
97 struct ib_ah_attr ah_attr
;
103 struct work_struct work
;
104 struct list_head list
;
105 struct cm_port
*port
;
106 struct ib_mad_recv_wc
*mad_recv_wc
; /* Received MADs */
107 __be32 local_id
; /* Established / timewait */
109 struct ib_cm_event cm_event
;
110 struct ib_sa_path_rec path
[0];
113 struct cm_timewait_info
{
114 struct cm_work work
; /* Must be first. */
115 struct rb_node remote_qp_node
;
116 struct rb_node remote_id_node
;
117 __be64 remote_ca_guid
;
119 u8 inserted_remote_qp
;
120 u8 inserted_remote_id
;
123 struct cm_id_private
{
126 struct rb_node service_node
;
127 struct rb_node sidr_id_node
;
128 spinlock_t lock
; /* Do not acquire inside cm.lock */
129 struct completion comp
;
132 struct ib_mad_send_buf
*msg
;
133 struct cm_timewait_info
*timewait_info
;
134 /* todo: use alternate port on send failure */
137 struct ib_cm_compare_data
*compare_data
;
143 enum ib_qp_type qp_type
;
147 enum ib_mtu path_mtu
;
151 u8 responder_resources
;
153 u8 local_ack_timeout
;
158 struct list_head work_list
;
162 static void cm_work_handler(void *data
);
164 static inline void cm_deref_id(struct cm_id_private
*cm_id_priv
)
166 if (atomic_dec_and_test(&cm_id_priv
->refcount
))
167 complete(&cm_id_priv
->comp
);
170 static int cm_alloc_msg(struct cm_id_private
*cm_id_priv
,
171 struct ib_mad_send_buf
**msg
)
173 struct ib_mad_agent
*mad_agent
;
174 struct ib_mad_send_buf
*m
;
177 mad_agent
= cm_id_priv
->av
.port
->mad_agent
;
178 ah
= ib_create_ah(mad_agent
->qp
->pd
, &cm_id_priv
->av
.ah_attr
);
182 m
= ib_create_send_mad(mad_agent
, cm_id_priv
->id
.remote_cm_qpn
,
183 cm_id_priv
->av
.pkey_index
,
184 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
191 /* Timeout set by caller if response is expected. */
193 m
->retries
= cm_id_priv
->max_cm_retries
;
195 atomic_inc(&cm_id_priv
->refcount
);
196 m
->context
[0] = cm_id_priv
;
201 static int cm_alloc_response_msg(struct cm_port
*port
,
202 struct ib_mad_recv_wc
*mad_recv_wc
,
203 struct ib_mad_send_buf
**msg
)
205 struct ib_mad_send_buf
*m
;
208 ah
= ib_create_ah_from_wc(port
->mad_agent
->qp
->pd
, mad_recv_wc
->wc
,
209 mad_recv_wc
->recv_buf
.grh
, port
->port_num
);
213 m
= ib_create_send_mad(port
->mad_agent
, 1, mad_recv_wc
->wc
->pkey_index
,
214 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
225 static void cm_free_msg(struct ib_mad_send_buf
*msg
)
227 ib_destroy_ah(msg
->ah
);
229 cm_deref_id(msg
->context
[0]);
230 ib_free_send_mad(msg
);
233 static void * cm_copy_private_data(const void *private_data
,
238 if (!private_data
|| !private_data_len
)
241 data
= kmalloc(private_data_len
, GFP_KERNEL
);
243 return ERR_PTR(-ENOMEM
);
245 memcpy(data
, private_data
, private_data_len
);
249 static void cm_set_private_data(struct cm_id_private
*cm_id_priv
,
250 void *private_data
, u8 private_data_len
)
252 if (cm_id_priv
->private_data
&& cm_id_priv
->private_data_len
)
253 kfree(cm_id_priv
->private_data
);
255 cm_id_priv
->private_data
= private_data
;
256 cm_id_priv
->private_data_len
= private_data_len
;
259 static void cm_init_av_for_response(struct cm_port
*port
, struct ib_wc
*wc
,
260 struct ib_grh
*grh
, struct cm_av
*av
)
263 av
->pkey_index
= wc
->pkey_index
;
264 ib_init_ah_from_wc(port
->cm_dev
->device
, port
->port_num
, wc
,
268 static int cm_init_av_by_path(struct ib_sa_path_rec
*path
, struct cm_av
*av
)
270 struct cm_device
*cm_dev
;
271 struct cm_port
*port
= NULL
;
276 read_lock_irqsave(&cm
.device_lock
, flags
);
277 list_for_each_entry(cm_dev
, &cm
.device_list
, list
) {
278 if (!ib_find_cached_gid(cm_dev
->device
, &path
->sgid
,
280 port
= &cm_dev
->port
[p
-1];
284 read_unlock_irqrestore(&cm
.device_lock
, flags
);
289 ret
= ib_find_cached_pkey(cm_dev
->device
, port
->port_num
,
290 be16_to_cpu(path
->pkey
), &av
->pkey_index
);
295 ib_init_ah_from_path(cm_dev
->device
, port
->port_num
, path
,
297 av
->packet_life_time
= path
->packet_life_time
;
301 static int cm_alloc_id(struct cm_id_private
*cm_id_priv
)
308 spin_lock_irqsave(&cm
.lock
, flags
);
309 ret
= idr_get_new_above(&cm
.local_id_table
, cm_id_priv
,
311 spin_unlock_irqrestore(&cm
.lock
, flags
);
312 } while( (ret
== -EAGAIN
) && idr_pre_get(&cm
.local_id_table
, GFP_KERNEL
) );
314 cm_id_priv
->id
.local_id
= (__force __be32
) (id
^ cm
.random_id_operand
);
318 static void cm_free_id(__be32 local_id
)
322 spin_lock_irqsave(&cm
.lock
, flags
);
323 idr_remove(&cm
.local_id_table
,
324 (__force
int) (local_id
^ cm
.random_id_operand
));
325 spin_unlock_irqrestore(&cm
.lock
, flags
);
328 static struct cm_id_private
* cm_get_id(__be32 local_id
, __be32 remote_id
)
330 struct cm_id_private
*cm_id_priv
;
332 cm_id_priv
= idr_find(&cm
.local_id_table
,
333 (__force
int) (local_id
^ cm
.random_id_operand
));
335 if (cm_id_priv
->id
.remote_id
== remote_id
)
336 atomic_inc(&cm_id_priv
->refcount
);
344 static struct cm_id_private
* cm_acquire_id(__be32 local_id
, __be32 remote_id
)
346 struct cm_id_private
*cm_id_priv
;
349 spin_lock_irqsave(&cm
.lock
, flags
);
350 cm_id_priv
= cm_get_id(local_id
, remote_id
);
351 spin_unlock_irqrestore(&cm
.lock
, flags
);
356 static void cm_mask_copy(u8
*dst
, u8
*src
, u8
*mask
)
360 for (i
= 0; i
< IB_CM_COMPARE_SIZE
/ sizeof(unsigned long); i
++)
361 ((unsigned long *) dst
)[i
] = ((unsigned long *) src
)[i
] &
362 ((unsigned long *) mask
)[i
];
365 static int cm_compare_data(struct ib_cm_compare_data
*src_data
,
366 struct ib_cm_compare_data
*dst_data
)
368 u8 src
[IB_CM_COMPARE_SIZE
];
369 u8 dst
[IB_CM_COMPARE_SIZE
];
371 if (!src_data
|| !dst_data
)
374 cm_mask_copy(src
, src_data
->data
, dst_data
->mask
);
375 cm_mask_copy(dst
, dst_data
->data
, src_data
->mask
);
376 return memcmp(src
, dst
, IB_CM_COMPARE_SIZE
);
379 static int cm_compare_private_data(u8
*private_data
,
380 struct ib_cm_compare_data
*dst_data
)
382 u8 src
[IB_CM_COMPARE_SIZE
];
387 cm_mask_copy(src
, private_data
, dst_data
->mask
);
388 return memcmp(src
, dst_data
->data
, IB_CM_COMPARE_SIZE
);
391 static struct cm_id_private
* cm_insert_listen(struct cm_id_private
*cm_id_priv
)
393 struct rb_node
**link
= &cm
.listen_service_table
.rb_node
;
394 struct rb_node
*parent
= NULL
;
395 struct cm_id_private
*cur_cm_id_priv
;
396 __be64 service_id
= cm_id_priv
->id
.service_id
;
397 __be64 service_mask
= cm_id_priv
->id
.service_mask
;
402 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
404 data_cmp
= cm_compare_data(cm_id_priv
->compare_data
,
405 cur_cm_id_priv
->compare_data
);
406 if ((cur_cm_id_priv
->id
.service_mask
& service_id
) ==
407 (service_mask
& cur_cm_id_priv
->id
.service_id
) &&
408 (cm_id_priv
->id
.device
== cur_cm_id_priv
->id
.device
) &&
410 return cur_cm_id_priv
;
412 if (cm_id_priv
->id
.device
< cur_cm_id_priv
->id
.device
)
413 link
= &(*link
)->rb_left
;
414 else if (cm_id_priv
->id
.device
> cur_cm_id_priv
->id
.device
)
415 link
= &(*link
)->rb_right
;
416 else if (service_id
< cur_cm_id_priv
->id
.service_id
)
417 link
= &(*link
)->rb_left
;
418 else if (service_id
> cur_cm_id_priv
->id
.service_id
)
419 link
= &(*link
)->rb_right
;
420 else if (data_cmp
< 0)
421 link
= &(*link
)->rb_left
;
423 link
= &(*link
)->rb_right
;
425 rb_link_node(&cm_id_priv
->service_node
, parent
, link
);
426 rb_insert_color(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
430 static struct cm_id_private
* cm_find_listen(struct ib_device
*device
,
434 struct rb_node
*node
= cm
.listen_service_table
.rb_node
;
435 struct cm_id_private
*cm_id_priv
;
439 cm_id_priv
= rb_entry(node
, struct cm_id_private
, service_node
);
440 data_cmp
= cm_compare_private_data(private_data
,
441 cm_id_priv
->compare_data
);
442 if ((cm_id_priv
->id
.service_mask
& service_id
) ==
443 cm_id_priv
->id
.service_id
&&
444 (cm_id_priv
->id
.device
== device
) && !data_cmp
)
447 if (device
< cm_id_priv
->id
.device
)
448 node
= node
->rb_left
;
449 else if (device
> cm_id_priv
->id
.device
)
450 node
= node
->rb_right
;
451 else if (service_id
< cm_id_priv
->id
.service_id
)
452 node
= node
->rb_left
;
453 else if (service_id
> cm_id_priv
->id
.service_id
)
454 node
= node
->rb_right
;
455 else if (data_cmp
< 0)
456 node
= node
->rb_left
;
458 node
= node
->rb_right
;
463 static struct cm_timewait_info
* cm_insert_remote_id(struct cm_timewait_info
466 struct rb_node
**link
= &cm
.remote_id_table
.rb_node
;
467 struct rb_node
*parent
= NULL
;
468 struct cm_timewait_info
*cur_timewait_info
;
469 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
470 __be32 remote_id
= timewait_info
->work
.remote_id
;
474 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
476 if (remote_id
< cur_timewait_info
->work
.remote_id
)
477 link
= &(*link
)->rb_left
;
478 else if (remote_id
> cur_timewait_info
->work
.remote_id
)
479 link
= &(*link
)->rb_right
;
480 else if (remote_ca_guid
< cur_timewait_info
->remote_ca_guid
)
481 link
= &(*link
)->rb_left
;
482 else if (remote_ca_guid
> cur_timewait_info
->remote_ca_guid
)
483 link
= &(*link
)->rb_right
;
485 return cur_timewait_info
;
487 timewait_info
->inserted_remote_id
= 1;
488 rb_link_node(&timewait_info
->remote_id_node
, parent
, link
);
489 rb_insert_color(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
493 static struct cm_timewait_info
* cm_find_remote_id(__be64 remote_ca_guid
,
496 struct rb_node
*node
= cm
.remote_id_table
.rb_node
;
497 struct cm_timewait_info
*timewait_info
;
500 timewait_info
= rb_entry(node
, struct cm_timewait_info
,
502 if (remote_id
< timewait_info
->work
.remote_id
)
503 node
= node
->rb_left
;
504 else if (remote_id
> timewait_info
->work
.remote_id
)
505 node
= node
->rb_right
;
506 else if (remote_ca_guid
< timewait_info
->remote_ca_guid
)
507 node
= node
->rb_left
;
508 else if (remote_ca_guid
> timewait_info
->remote_ca_guid
)
509 node
= node
->rb_right
;
511 return timewait_info
;
516 static struct cm_timewait_info
* cm_insert_remote_qpn(struct cm_timewait_info
519 struct rb_node
**link
= &cm
.remote_qp_table
.rb_node
;
520 struct rb_node
*parent
= NULL
;
521 struct cm_timewait_info
*cur_timewait_info
;
522 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
523 __be32 remote_qpn
= timewait_info
->remote_qpn
;
527 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
529 if (remote_qpn
< cur_timewait_info
->remote_qpn
)
530 link
= &(*link
)->rb_left
;
531 else if (remote_qpn
> cur_timewait_info
->remote_qpn
)
532 link
= &(*link
)->rb_right
;
533 else if (remote_ca_guid
< cur_timewait_info
->remote_ca_guid
)
534 link
= &(*link
)->rb_left
;
535 else if (remote_ca_guid
> cur_timewait_info
->remote_ca_guid
)
536 link
= &(*link
)->rb_right
;
538 return cur_timewait_info
;
540 timewait_info
->inserted_remote_qp
= 1;
541 rb_link_node(&timewait_info
->remote_qp_node
, parent
, link
);
542 rb_insert_color(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
546 static struct cm_id_private
* cm_insert_remote_sidr(struct cm_id_private
549 struct rb_node
**link
= &cm
.remote_sidr_table
.rb_node
;
550 struct rb_node
*parent
= NULL
;
551 struct cm_id_private
*cur_cm_id_priv
;
552 union ib_gid
*port_gid
= &cm_id_priv
->av
.dgid
;
553 __be32 remote_id
= cm_id_priv
->id
.remote_id
;
557 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
559 if (remote_id
< cur_cm_id_priv
->id
.remote_id
)
560 link
= &(*link
)->rb_left
;
561 else if (remote_id
> cur_cm_id_priv
->id
.remote_id
)
562 link
= &(*link
)->rb_right
;
565 cmp
= memcmp(port_gid
, &cur_cm_id_priv
->av
.dgid
,
568 link
= &(*link
)->rb_left
;
570 link
= &(*link
)->rb_right
;
572 return cur_cm_id_priv
;
575 rb_link_node(&cm_id_priv
->sidr_id_node
, parent
, link
);
576 rb_insert_color(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
580 static void cm_reject_sidr_req(struct cm_id_private
*cm_id_priv
,
581 enum ib_cm_sidr_status status
)
583 struct ib_cm_sidr_rep_param param
;
585 memset(¶m
, 0, sizeof param
);
586 param
.status
= status
;
587 ib_send_cm_sidr_rep(&cm_id_priv
->id
, ¶m
);
590 struct ib_cm_id
*ib_create_cm_id(struct ib_device
*device
,
591 ib_cm_handler cm_handler
,
594 struct cm_id_private
*cm_id_priv
;
597 cm_id_priv
= kzalloc(sizeof *cm_id_priv
, GFP_KERNEL
);
599 return ERR_PTR(-ENOMEM
);
601 cm_id_priv
->id
.state
= IB_CM_IDLE
;
602 cm_id_priv
->id
.device
= device
;
603 cm_id_priv
->id
.cm_handler
= cm_handler
;
604 cm_id_priv
->id
.context
= context
;
605 cm_id_priv
->id
.remote_cm_qpn
= 1;
606 ret
= cm_alloc_id(cm_id_priv
);
610 spin_lock_init(&cm_id_priv
->lock
);
611 init_completion(&cm_id_priv
->comp
);
612 INIT_LIST_HEAD(&cm_id_priv
->work_list
);
613 atomic_set(&cm_id_priv
->work_count
, -1);
614 atomic_set(&cm_id_priv
->refcount
, 1);
615 return &cm_id_priv
->id
;
619 return ERR_PTR(-ENOMEM
);
621 EXPORT_SYMBOL(ib_create_cm_id
);
623 static struct cm_work
* cm_dequeue_work(struct cm_id_private
*cm_id_priv
)
625 struct cm_work
*work
;
627 if (list_empty(&cm_id_priv
->work_list
))
630 work
= list_entry(cm_id_priv
->work_list
.next
, struct cm_work
, list
);
631 list_del(&work
->list
);
635 static void cm_free_work(struct cm_work
*work
)
637 if (work
->mad_recv_wc
)
638 ib_free_recv_mad(work
->mad_recv_wc
);
642 static inline int cm_convert_to_ms(int iba_time
)
644 /* approximate conversion to ms from 4.096us x 2^iba_time */
645 return 1 << max(iba_time
- 8, 0);
648 static void cm_cleanup_timewait(struct cm_timewait_info
*timewait_info
)
652 if (!timewait_info
->inserted_remote_id
&&
653 !timewait_info
->inserted_remote_qp
)
656 spin_lock_irqsave(&cm
.lock
, flags
);
657 if (timewait_info
->inserted_remote_id
) {
658 rb_erase(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
659 timewait_info
->inserted_remote_id
= 0;
662 if (timewait_info
->inserted_remote_qp
) {
663 rb_erase(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
664 timewait_info
->inserted_remote_qp
= 0;
666 spin_unlock_irqrestore(&cm
.lock
, flags
);
669 static struct cm_timewait_info
* cm_create_timewait_info(__be32 local_id
)
671 struct cm_timewait_info
*timewait_info
;
673 timewait_info
= kzalloc(sizeof *timewait_info
, GFP_KERNEL
);
675 return ERR_PTR(-ENOMEM
);
677 timewait_info
->work
.local_id
= local_id
;
678 INIT_WORK(&timewait_info
->work
.work
, cm_work_handler
,
679 &timewait_info
->work
);
680 timewait_info
->work
.cm_event
.event
= IB_CM_TIMEWAIT_EXIT
;
681 return timewait_info
;
684 static void cm_enter_timewait(struct cm_id_private
*cm_id_priv
)
689 * The cm_id could be destroyed by the user before we exit timewait.
690 * To protect against this, we search for the cm_id after exiting
691 * timewait before notifying the user that we've exited timewait.
693 cm_id_priv
->id
.state
= IB_CM_TIMEWAIT
;
694 wait_time
= cm_convert_to_ms(cm_id_priv
->local_ack_timeout
);
695 queue_delayed_work(cm
.wq
, &cm_id_priv
->timewait_info
->work
.work
,
696 msecs_to_jiffies(wait_time
));
697 cm_id_priv
->timewait_info
= NULL
;
700 static void cm_reset_to_idle(struct cm_id_private
*cm_id_priv
)
702 cm_id_priv
->id
.state
= IB_CM_IDLE
;
703 if (cm_id_priv
->timewait_info
) {
704 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
705 kfree(cm_id_priv
->timewait_info
);
706 cm_id_priv
->timewait_info
= NULL
;
710 static void cm_destroy_id(struct ib_cm_id
*cm_id
, int err
)
712 struct cm_id_private
*cm_id_priv
;
713 struct cm_work
*work
;
716 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
718 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
719 switch (cm_id
->state
) {
721 cm_id
->state
= IB_CM_IDLE
;
722 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
723 spin_lock_irqsave(&cm
.lock
, flags
);
724 rb_erase(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
725 spin_unlock_irqrestore(&cm
.lock
, flags
);
727 case IB_CM_SIDR_REQ_SENT
:
728 cm_id
->state
= IB_CM_IDLE
;
729 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
730 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
732 case IB_CM_SIDR_REQ_RCVD
:
733 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
734 cm_reject_sidr_req(cm_id_priv
, IB_SIDR_REJECT
);
737 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
738 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
739 ib_send_cm_rej(cm_id
, IB_CM_REJ_TIMEOUT
,
740 &cm_id_priv
->av
.port
->cm_dev
->ca_guid
,
741 sizeof cm_id_priv
->av
.port
->cm_dev
->ca_guid
,
745 if (err
== -ENOMEM
) {
746 /* Do not reject to allow future retries. */
747 cm_reset_to_idle(cm_id_priv
);
748 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
750 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
751 ib_send_cm_rej(cm_id
, IB_CM_REJ_CONSUMER_DEFINED
,
755 case IB_CM_MRA_REQ_RCVD
:
757 case IB_CM_MRA_REP_RCVD
:
758 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
760 case IB_CM_MRA_REQ_SENT
:
762 case IB_CM_MRA_REP_SENT
:
763 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
764 ib_send_cm_rej(cm_id
, IB_CM_REJ_CONSUMER_DEFINED
,
767 case IB_CM_ESTABLISHED
:
768 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
769 ib_send_cm_dreq(cm_id
, NULL
, 0);
771 case IB_CM_DREQ_SENT
:
772 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
773 cm_enter_timewait(cm_id_priv
);
774 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
776 case IB_CM_DREQ_RCVD
:
777 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
778 ib_send_cm_drep(cm_id
, NULL
, 0);
781 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
785 cm_free_id(cm_id
->local_id
);
786 cm_deref_id(cm_id_priv
);
787 wait_for_completion(&cm_id_priv
->comp
);
788 while ((work
= cm_dequeue_work(cm_id_priv
)) != NULL
)
790 kfree(cm_id_priv
->compare_data
);
791 kfree(cm_id_priv
->private_data
);
795 void ib_destroy_cm_id(struct ib_cm_id
*cm_id
)
797 cm_destroy_id(cm_id
, 0);
799 EXPORT_SYMBOL(ib_destroy_cm_id
);
801 int ib_cm_listen(struct ib_cm_id
*cm_id
, __be64 service_id
, __be64 service_mask
,
802 struct ib_cm_compare_data
*compare_data
)
804 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
808 service_mask
= service_mask
? service_mask
:
809 __constant_cpu_to_be64(~0ULL);
810 service_id
&= service_mask
;
811 if ((service_id
& IB_SERVICE_ID_AGN_MASK
) == IB_CM_ASSIGN_SERVICE_ID
&&
812 (service_id
!= IB_CM_ASSIGN_SERVICE_ID
))
815 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
816 if (cm_id
->state
!= IB_CM_IDLE
)
820 cm_id_priv
->compare_data
= kzalloc(sizeof *compare_data
,
822 if (!cm_id_priv
->compare_data
)
824 cm_mask_copy(cm_id_priv
->compare_data
->data
,
825 compare_data
->data
, compare_data
->mask
);
826 memcpy(cm_id_priv
->compare_data
->mask
, compare_data
->mask
,
830 cm_id
->state
= IB_CM_LISTEN
;
832 spin_lock_irqsave(&cm
.lock
, flags
);
833 if (service_id
== IB_CM_ASSIGN_SERVICE_ID
) {
834 cm_id
->service_id
= cpu_to_be64(cm
.listen_service_id
++);
835 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
837 cm_id
->service_id
= service_id
;
838 cm_id
->service_mask
= service_mask
;
840 cur_cm_id_priv
= cm_insert_listen(cm_id_priv
);
841 spin_unlock_irqrestore(&cm
.lock
, flags
);
843 if (cur_cm_id_priv
) {
844 cm_id
->state
= IB_CM_IDLE
;
845 kfree(cm_id_priv
->compare_data
);
846 cm_id_priv
->compare_data
= NULL
;
851 EXPORT_SYMBOL(ib_cm_listen
);
853 static __be64
cm_form_tid(struct cm_id_private
*cm_id_priv
,
854 enum cm_msg_sequence msg_seq
)
858 hi_tid
= ((u64
) cm_id_priv
->av
.port
->mad_agent
->hi_tid
) << 32;
859 low_tid
= (u64
) ((__force u32
)cm_id_priv
->id
.local_id
|
861 return cpu_to_be64(hi_tid
| low_tid
);
864 static void cm_format_mad_hdr(struct ib_mad_hdr
*hdr
,
865 __be16 attr_id
, __be64 tid
)
867 hdr
->base_version
= IB_MGMT_BASE_VERSION
;
868 hdr
->mgmt_class
= IB_MGMT_CLASS_CM
;
869 hdr
->class_version
= IB_CM_CLASS_VERSION
;
870 hdr
->method
= IB_MGMT_METHOD_SEND
;
871 hdr
->attr_id
= attr_id
;
875 static void cm_format_req(struct cm_req_msg
*req_msg
,
876 struct cm_id_private
*cm_id_priv
,
877 struct ib_cm_req_param
*param
)
879 cm_format_mad_hdr(&req_msg
->hdr
, CM_REQ_ATTR_ID
,
880 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_REQ
));
882 req_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
883 req_msg
->service_id
= param
->service_id
;
884 req_msg
->local_ca_guid
= cm_id_priv
->av
.port
->cm_dev
->ca_guid
;
885 cm_req_set_local_qpn(req_msg
, cpu_to_be32(param
->qp_num
));
886 cm_req_set_resp_res(req_msg
, param
->responder_resources
);
887 cm_req_set_init_depth(req_msg
, param
->initiator_depth
);
888 cm_req_set_remote_resp_timeout(req_msg
,
889 param
->remote_cm_response_timeout
);
890 cm_req_set_qp_type(req_msg
, param
->qp_type
);
891 cm_req_set_flow_ctrl(req_msg
, param
->flow_control
);
892 cm_req_set_starting_psn(req_msg
, cpu_to_be32(param
->starting_psn
));
893 cm_req_set_local_resp_timeout(req_msg
,
894 param
->local_cm_response_timeout
);
895 cm_req_set_retry_count(req_msg
, param
->retry_count
);
896 req_msg
->pkey
= param
->primary_path
->pkey
;
897 cm_req_set_path_mtu(req_msg
, param
->primary_path
->mtu
);
898 cm_req_set_rnr_retry_count(req_msg
, param
->rnr_retry_count
);
899 cm_req_set_max_cm_retries(req_msg
, param
->max_cm_retries
);
900 cm_req_set_srq(req_msg
, param
->srq
);
902 req_msg
->primary_local_lid
= param
->primary_path
->slid
;
903 req_msg
->primary_remote_lid
= param
->primary_path
->dlid
;
904 req_msg
->primary_local_gid
= param
->primary_path
->sgid
;
905 req_msg
->primary_remote_gid
= param
->primary_path
->dgid
;
906 cm_req_set_primary_flow_label(req_msg
, param
->primary_path
->flow_label
);
907 cm_req_set_primary_packet_rate(req_msg
, param
->primary_path
->rate
);
908 req_msg
->primary_traffic_class
= param
->primary_path
->traffic_class
;
909 req_msg
->primary_hop_limit
= param
->primary_path
->hop_limit
;
910 cm_req_set_primary_sl(req_msg
, param
->primary_path
->sl
);
911 cm_req_set_primary_subnet_local(req_msg
, 1); /* local only... */
912 cm_req_set_primary_local_ack_timeout(req_msg
,
913 min(31, param
->primary_path
->packet_life_time
+ 1));
915 if (param
->alternate_path
) {
916 req_msg
->alt_local_lid
= param
->alternate_path
->slid
;
917 req_msg
->alt_remote_lid
= param
->alternate_path
->dlid
;
918 req_msg
->alt_local_gid
= param
->alternate_path
->sgid
;
919 req_msg
->alt_remote_gid
= param
->alternate_path
->dgid
;
920 cm_req_set_alt_flow_label(req_msg
,
921 param
->alternate_path
->flow_label
);
922 cm_req_set_alt_packet_rate(req_msg
, param
->alternate_path
->rate
);
923 req_msg
->alt_traffic_class
= param
->alternate_path
->traffic_class
;
924 req_msg
->alt_hop_limit
= param
->alternate_path
->hop_limit
;
925 cm_req_set_alt_sl(req_msg
, param
->alternate_path
->sl
);
926 cm_req_set_alt_subnet_local(req_msg
, 1); /* local only... */
927 cm_req_set_alt_local_ack_timeout(req_msg
,
928 min(31, param
->alternate_path
->packet_life_time
+ 1));
931 if (param
->private_data
&& param
->private_data_len
)
932 memcpy(req_msg
->private_data
, param
->private_data
,
933 param
->private_data_len
);
936 static int cm_validate_req_param(struct ib_cm_req_param
*param
)
938 /* peer-to-peer not supported */
939 if (param
->peer_to_peer
)
942 if (!param
->primary_path
)
945 if (param
->qp_type
!= IB_QPT_RC
&& param
->qp_type
!= IB_QPT_UC
)
948 if (param
->private_data
&&
949 param
->private_data_len
> IB_CM_REQ_PRIVATE_DATA_SIZE
)
952 if (param
->alternate_path
&&
953 (param
->alternate_path
->pkey
!= param
->primary_path
->pkey
||
954 param
->alternate_path
->mtu
!= param
->primary_path
->mtu
))
960 int ib_send_cm_req(struct ib_cm_id
*cm_id
,
961 struct ib_cm_req_param
*param
)
963 struct cm_id_private
*cm_id_priv
;
964 struct cm_req_msg
*req_msg
;
968 ret
= cm_validate_req_param(param
);
972 /* Verify that we're not in timewait. */
973 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
974 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
975 if (cm_id
->state
!= IB_CM_IDLE
) {
976 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
980 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
982 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
984 if (IS_ERR(cm_id_priv
->timewait_info
)) {
985 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
989 ret
= cm_init_av_by_path(param
->primary_path
, &cm_id_priv
->av
);
992 if (param
->alternate_path
) {
993 ret
= cm_init_av_by_path(param
->alternate_path
,
994 &cm_id_priv
->alt_av
);
998 cm_id
->service_id
= param
->service_id
;
999 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
1000 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1001 param
->primary_path
->packet_life_time
) * 2 +
1003 param
->remote_cm_response_timeout
);
1004 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
1005 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1006 cm_id_priv
->responder_resources
= param
->responder_resources
;
1007 cm_id_priv
->retry_count
= param
->retry_count
;
1008 cm_id_priv
->path_mtu
= param
->primary_path
->mtu
;
1009 cm_id_priv
->qp_type
= param
->qp_type
;
1011 ret
= cm_alloc_msg(cm_id_priv
, &cm_id_priv
->msg
);
1015 req_msg
= (struct cm_req_msg
*) cm_id_priv
->msg
->mad
;
1016 cm_format_req(req_msg
, cm_id_priv
, param
);
1017 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1018 cm_id_priv
->msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1019 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long) IB_CM_REQ_SENT
;
1021 cm_id_priv
->local_qpn
= cm_req_get_local_qpn(req_msg
);
1022 cm_id_priv
->rq_psn
= cm_req_get_starting_psn(req_msg
);
1023 cm_id_priv
->local_ack_timeout
=
1024 cm_req_get_primary_local_ack_timeout(req_msg
);
1026 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1027 ret
= ib_post_send_mad(cm_id_priv
->msg
, NULL
);
1029 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1032 BUG_ON(cm_id
->state
!= IB_CM_IDLE
);
1033 cm_id
->state
= IB_CM_REQ_SENT
;
1034 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1037 error2
: cm_free_msg(cm_id_priv
->msg
);
1038 error1
: kfree(cm_id_priv
->timewait_info
);
1041 EXPORT_SYMBOL(ib_send_cm_req
);
1043 static int cm_issue_rej(struct cm_port
*port
,
1044 struct ib_mad_recv_wc
*mad_recv_wc
,
1045 enum ib_cm_rej_reason reason
,
1046 enum cm_msg_response msg_rejected
,
1047 void *ari
, u8 ari_length
)
1049 struct ib_mad_send_buf
*msg
= NULL
;
1050 struct cm_rej_msg
*rej_msg
, *rcv_msg
;
1053 ret
= cm_alloc_response_msg(port
, mad_recv_wc
, &msg
);
1057 /* We just need common CM header information. Cast to any message. */
1058 rcv_msg
= (struct cm_rej_msg
*) mad_recv_wc
->recv_buf
.mad
;
1059 rej_msg
= (struct cm_rej_msg
*) msg
->mad
;
1061 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, rcv_msg
->hdr
.tid
);
1062 rej_msg
->remote_comm_id
= rcv_msg
->local_comm_id
;
1063 rej_msg
->local_comm_id
= rcv_msg
->remote_comm_id
;
1064 cm_rej_set_msg_rejected(rej_msg
, msg_rejected
);
1065 rej_msg
->reason
= cpu_to_be16(reason
);
1067 if (ari
&& ari_length
) {
1068 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1069 memcpy(rej_msg
->ari
, ari
, ari_length
);
1072 ret
= ib_post_send_mad(msg
, NULL
);
1079 static inline int cm_is_active_peer(__be64 local_ca_guid
, __be64 remote_ca_guid
,
1080 __be32 local_qpn
, __be32 remote_qpn
)
1082 return (be64_to_cpu(local_ca_guid
) > be64_to_cpu(remote_ca_guid
) ||
1083 ((local_ca_guid
== remote_ca_guid
) &&
1084 (be32_to_cpu(local_qpn
) > be32_to_cpu(remote_qpn
))));
1087 static void cm_format_paths_from_req(struct cm_req_msg
*req_msg
,
1088 struct ib_sa_path_rec
*primary_path
,
1089 struct ib_sa_path_rec
*alt_path
)
1091 memset(primary_path
, 0, sizeof *primary_path
);
1092 primary_path
->dgid
= req_msg
->primary_local_gid
;
1093 primary_path
->sgid
= req_msg
->primary_remote_gid
;
1094 primary_path
->dlid
= req_msg
->primary_local_lid
;
1095 primary_path
->slid
= req_msg
->primary_remote_lid
;
1096 primary_path
->flow_label
= cm_req_get_primary_flow_label(req_msg
);
1097 primary_path
->hop_limit
= req_msg
->primary_hop_limit
;
1098 primary_path
->traffic_class
= req_msg
->primary_traffic_class
;
1099 primary_path
->reversible
= 1;
1100 primary_path
->pkey
= req_msg
->pkey
;
1101 primary_path
->sl
= cm_req_get_primary_sl(req_msg
);
1102 primary_path
->mtu_selector
= IB_SA_EQ
;
1103 primary_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1104 primary_path
->rate_selector
= IB_SA_EQ
;
1105 primary_path
->rate
= cm_req_get_primary_packet_rate(req_msg
);
1106 primary_path
->packet_life_time_selector
= IB_SA_EQ
;
1107 primary_path
->packet_life_time
=
1108 cm_req_get_primary_local_ack_timeout(req_msg
);
1109 primary_path
->packet_life_time
-= (primary_path
->packet_life_time
> 0);
1111 if (req_msg
->alt_local_lid
) {
1112 memset(alt_path
, 0, sizeof *alt_path
);
1113 alt_path
->dgid
= req_msg
->alt_local_gid
;
1114 alt_path
->sgid
= req_msg
->alt_remote_gid
;
1115 alt_path
->dlid
= req_msg
->alt_local_lid
;
1116 alt_path
->slid
= req_msg
->alt_remote_lid
;
1117 alt_path
->flow_label
= cm_req_get_alt_flow_label(req_msg
);
1118 alt_path
->hop_limit
= req_msg
->alt_hop_limit
;
1119 alt_path
->traffic_class
= req_msg
->alt_traffic_class
;
1120 alt_path
->reversible
= 1;
1121 alt_path
->pkey
= req_msg
->pkey
;
1122 alt_path
->sl
= cm_req_get_alt_sl(req_msg
);
1123 alt_path
->mtu_selector
= IB_SA_EQ
;
1124 alt_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1125 alt_path
->rate_selector
= IB_SA_EQ
;
1126 alt_path
->rate
= cm_req_get_alt_packet_rate(req_msg
);
1127 alt_path
->packet_life_time_selector
= IB_SA_EQ
;
1128 alt_path
->packet_life_time
=
1129 cm_req_get_alt_local_ack_timeout(req_msg
);
1130 alt_path
->packet_life_time
-= (alt_path
->packet_life_time
> 0);
1134 static void cm_format_req_event(struct cm_work
*work
,
1135 struct cm_id_private
*cm_id_priv
,
1136 struct ib_cm_id
*listen_id
)
1138 struct cm_req_msg
*req_msg
;
1139 struct ib_cm_req_event_param
*param
;
1141 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1142 param
= &work
->cm_event
.param
.req_rcvd
;
1143 param
->listen_id
= listen_id
;
1144 param
->port
= cm_id_priv
->av
.port
->port_num
;
1145 param
->primary_path
= &work
->path
[0];
1146 if (req_msg
->alt_local_lid
)
1147 param
->alternate_path
= &work
->path
[1];
1149 param
->alternate_path
= NULL
;
1150 param
->remote_ca_guid
= req_msg
->local_ca_guid
;
1151 param
->remote_qkey
= be32_to_cpu(req_msg
->local_qkey
);
1152 param
->remote_qpn
= be32_to_cpu(cm_req_get_local_qpn(req_msg
));
1153 param
->qp_type
= cm_req_get_qp_type(req_msg
);
1154 param
->starting_psn
= be32_to_cpu(cm_req_get_starting_psn(req_msg
));
1155 param
->responder_resources
= cm_req_get_init_depth(req_msg
);
1156 param
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1157 param
->local_cm_response_timeout
=
1158 cm_req_get_remote_resp_timeout(req_msg
);
1159 param
->flow_control
= cm_req_get_flow_ctrl(req_msg
);
1160 param
->remote_cm_response_timeout
=
1161 cm_req_get_local_resp_timeout(req_msg
);
1162 param
->retry_count
= cm_req_get_retry_count(req_msg
);
1163 param
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1164 param
->srq
= cm_req_get_srq(req_msg
);
1165 work
->cm_event
.private_data
= &req_msg
->private_data
;
1168 static void cm_process_work(struct cm_id_private
*cm_id_priv
,
1169 struct cm_work
*work
)
1171 unsigned long flags
;
1174 /* We will typically only have the current event to report. */
1175 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &work
->cm_event
);
1178 while (!ret
&& !atomic_add_negative(-1, &cm_id_priv
->work_count
)) {
1179 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1180 work
= cm_dequeue_work(cm_id_priv
);
1181 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1183 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
,
1187 cm_deref_id(cm_id_priv
);
1189 cm_destroy_id(&cm_id_priv
->id
, ret
);
1192 static void cm_format_mra(struct cm_mra_msg
*mra_msg
,
1193 struct cm_id_private
*cm_id_priv
,
1194 enum cm_msg_response msg_mraed
, u8 service_timeout
,
1195 const void *private_data
, u8 private_data_len
)
1197 cm_format_mad_hdr(&mra_msg
->hdr
, CM_MRA_ATTR_ID
, cm_id_priv
->tid
);
1198 cm_mra_set_msg_mraed(mra_msg
, msg_mraed
);
1199 mra_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1200 mra_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1201 cm_mra_set_service_timeout(mra_msg
, service_timeout
);
1203 if (private_data
&& private_data_len
)
1204 memcpy(mra_msg
->private_data
, private_data
, private_data_len
);
1207 static void cm_format_rej(struct cm_rej_msg
*rej_msg
,
1208 struct cm_id_private
*cm_id_priv
,
1209 enum ib_cm_rej_reason reason
,
1212 const void *private_data
,
1213 u8 private_data_len
)
1215 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, cm_id_priv
->tid
);
1216 rej_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1218 switch(cm_id_priv
->id
.state
) {
1219 case IB_CM_REQ_RCVD
:
1220 rej_msg
->local_comm_id
= 0;
1221 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1223 case IB_CM_MRA_REQ_SENT
:
1224 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1225 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1227 case IB_CM_REP_RCVD
:
1228 case IB_CM_MRA_REP_SENT
:
1229 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1230 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REP
);
1233 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1234 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_OTHER
);
1238 rej_msg
->reason
= cpu_to_be16(reason
);
1239 if (ari
&& ari_length
) {
1240 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1241 memcpy(rej_msg
->ari
, ari
, ari_length
);
1244 if (private_data
&& private_data_len
)
1245 memcpy(rej_msg
->private_data
, private_data
, private_data_len
);
1248 static void cm_dup_req_handler(struct cm_work
*work
,
1249 struct cm_id_private
*cm_id_priv
)
1251 struct ib_mad_send_buf
*msg
= NULL
;
1252 unsigned long flags
;
1255 /* Quick state check to discard duplicate REQs. */
1256 if (cm_id_priv
->id
.state
== IB_CM_REQ_RCVD
)
1259 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1263 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1264 switch (cm_id_priv
->id
.state
) {
1265 case IB_CM_MRA_REQ_SENT
:
1266 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1267 CM_MSG_RESPONSE_REQ
, cm_id_priv
->service_timeout
,
1268 cm_id_priv
->private_data
,
1269 cm_id_priv
->private_data_len
);
1271 case IB_CM_TIMEWAIT
:
1272 cm_format_rej((struct cm_rej_msg
*) msg
->mad
, cm_id_priv
,
1273 IB_CM_REJ_STALE_CONN
, NULL
, 0, NULL
, 0);
1278 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1280 ret
= ib_post_send_mad(msg
, NULL
);
1285 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1286 free
: cm_free_msg(msg
);
1289 static struct cm_id_private
* cm_match_req(struct cm_work
*work
,
1290 struct cm_id_private
*cm_id_priv
)
1292 struct cm_id_private
*listen_cm_id_priv
, *cur_cm_id_priv
;
1293 struct cm_timewait_info
*timewait_info
;
1294 struct cm_req_msg
*req_msg
;
1295 unsigned long flags
;
1297 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1299 /* Check for duplicate REQ and stale connections. */
1300 spin_lock_irqsave(&cm
.lock
, flags
);
1301 timewait_info
= cm_insert_remote_id(cm_id_priv
->timewait_info
);
1303 timewait_info
= cm_insert_remote_qpn(cm_id_priv
->timewait_info
);
1305 if (timewait_info
) {
1306 cur_cm_id_priv
= cm_get_id(timewait_info
->work
.local_id
,
1307 timewait_info
->work
.remote_id
);
1308 spin_unlock_irqrestore(&cm
.lock
, flags
);
1309 if (cur_cm_id_priv
) {
1310 cm_dup_req_handler(work
, cur_cm_id_priv
);
1311 cm_deref_id(cur_cm_id_priv
);
1313 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1314 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REQ
,
1319 /* Find matching listen request. */
1320 listen_cm_id_priv
= cm_find_listen(cm_id_priv
->id
.device
,
1321 req_msg
->service_id
,
1322 req_msg
->private_data
);
1323 if (!listen_cm_id_priv
) {
1324 spin_unlock_irqrestore(&cm
.lock
, flags
);
1325 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1326 IB_CM_REJ_INVALID_SERVICE_ID
, CM_MSG_RESPONSE_REQ
,
1330 atomic_inc(&listen_cm_id_priv
->refcount
);
1331 atomic_inc(&cm_id_priv
->refcount
);
1332 cm_id_priv
->id
.state
= IB_CM_REQ_RCVD
;
1333 atomic_inc(&cm_id_priv
->work_count
);
1334 spin_unlock_irqrestore(&cm
.lock
, flags
);
1335 return listen_cm_id_priv
;
1337 error
: cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1341 static int cm_req_handler(struct cm_work
*work
)
1343 struct ib_cm_id
*cm_id
;
1344 struct cm_id_private
*cm_id_priv
, *listen_cm_id_priv
;
1345 struct cm_req_msg
*req_msg
;
1348 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1350 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->device
, NULL
, NULL
);
1352 return PTR_ERR(cm_id
);
1354 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1355 cm_id_priv
->id
.remote_id
= req_msg
->local_comm_id
;
1356 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
1357 work
->mad_recv_wc
->recv_buf
.grh
,
1359 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
1361 if (IS_ERR(cm_id_priv
->timewait_info
)) {
1362 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
1365 cm_id_priv
->timewait_info
->work
.remote_id
= req_msg
->local_comm_id
;
1366 cm_id_priv
->timewait_info
->remote_ca_guid
= req_msg
->local_ca_guid
;
1367 cm_id_priv
->timewait_info
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1369 listen_cm_id_priv
= cm_match_req(work
, cm_id_priv
);
1370 if (!listen_cm_id_priv
) {
1372 kfree(cm_id_priv
->timewait_info
);
1376 cm_id_priv
->id
.cm_handler
= listen_cm_id_priv
->id
.cm_handler
;
1377 cm_id_priv
->id
.context
= listen_cm_id_priv
->id
.context
;
1378 cm_id_priv
->id
.service_id
= req_msg
->service_id
;
1379 cm_id_priv
->id
.service_mask
= __constant_cpu_to_be64(~0ULL);
1381 cm_format_paths_from_req(req_msg
, &work
->path
[0], &work
->path
[1]);
1382 ret
= cm_init_av_by_path(&work
->path
[0], &cm_id_priv
->av
);
1384 ib_get_cached_gid(work
->port
->cm_dev
->device
,
1385 work
->port
->port_num
, 0, &work
->path
[0].sgid
);
1386 ib_send_cm_rej(cm_id
, IB_CM_REJ_INVALID_GID
,
1387 &work
->path
[0].sgid
, sizeof work
->path
[0].sgid
,
1391 if (req_msg
->alt_local_lid
) {
1392 ret
= cm_init_av_by_path(&work
->path
[1], &cm_id_priv
->alt_av
);
1394 ib_send_cm_rej(cm_id
, IB_CM_REJ_INVALID_ALT_GID
,
1395 &work
->path
[0].sgid
,
1396 sizeof work
->path
[0].sgid
, NULL
, 0);
1400 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1401 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1402 cm_req_get_local_resp_timeout(req_msg
));
1403 cm_id_priv
->max_cm_retries
= cm_req_get_max_cm_retries(req_msg
);
1404 cm_id_priv
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1405 cm_id_priv
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1406 cm_id_priv
->responder_resources
= cm_req_get_init_depth(req_msg
);
1407 cm_id_priv
->path_mtu
= cm_req_get_path_mtu(req_msg
);
1408 cm_id_priv
->sq_psn
= cm_req_get_starting_psn(req_msg
);
1409 cm_id_priv
->local_ack_timeout
=
1410 cm_req_get_primary_local_ack_timeout(req_msg
);
1411 cm_id_priv
->retry_count
= cm_req_get_retry_count(req_msg
);
1412 cm_id_priv
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1413 cm_id_priv
->qp_type
= cm_req_get_qp_type(req_msg
);
1415 cm_format_req_event(work
, cm_id_priv
, &listen_cm_id_priv
->id
);
1416 cm_process_work(cm_id_priv
, work
);
1417 cm_deref_id(listen_cm_id_priv
);
1421 atomic_dec(&cm_id_priv
->refcount
);
1422 cm_deref_id(listen_cm_id_priv
);
1424 ib_destroy_cm_id(cm_id
);
1428 static void cm_format_rep(struct cm_rep_msg
*rep_msg
,
1429 struct cm_id_private
*cm_id_priv
,
1430 struct ib_cm_rep_param
*param
)
1432 cm_format_mad_hdr(&rep_msg
->hdr
, CM_REP_ATTR_ID
, cm_id_priv
->tid
);
1433 rep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1434 rep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1435 cm_rep_set_local_qpn(rep_msg
, cpu_to_be32(param
->qp_num
));
1436 cm_rep_set_starting_psn(rep_msg
, cpu_to_be32(param
->starting_psn
));
1437 rep_msg
->resp_resources
= param
->responder_resources
;
1438 rep_msg
->initiator_depth
= param
->initiator_depth
;
1439 cm_rep_set_target_ack_delay(rep_msg
, param
->target_ack_delay
);
1440 cm_rep_set_failover(rep_msg
, param
->failover_accepted
);
1441 cm_rep_set_flow_ctrl(rep_msg
, param
->flow_control
);
1442 cm_rep_set_rnr_retry_count(rep_msg
, param
->rnr_retry_count
);
1443 cm_rep_set_srq(rep_msg
, param
->srq
);
1444 rep_msg
->local_ca_guid
= cm_id_priv
->av
.port
->cm_dev
->ca_guid
;
1446 if (param
->private_data
&& param
->private_data_len
)
1447 memcpy(rep_msg
->private_data
, param
->private_data
,
1448 param
->private_data_len
);
1451 int ib_send_cm_rep(struct ib_cm_id
*cm_id
,
1452 struct ib_cm_rep_param
*param
)
1454 struct cm_id_private
*cm_id_priv
;
1455 struct ib_mad_send_buf
*msg
;
1456 struct cm_rep_msg
*rep_msg
;
1457 unsigned long flags
;
1460 if (param
->private_data
&&
1461 param
->private_data_len
> IB_CM_REP_PRIVATE_DATA_SIZE
)
1464 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1465 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1466 if (cm_id
->state
!= IB_CM_REQ_RCVD
&&
1467 cm_id
->state
!= IB_CM_MRA_REQ_SENT
) {
1472 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1476 rep_msg
= (struct cm_rep_msg
*) msg
->mad
;
1477 cm_format_rep(rep_msg
, cm_id_priv
, param
);
1478 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1479 msg
->context
[1] = (void *) (unsigned long) IB_CM_REP_SENT
;
1481 ret
= ib_post_send_mad(msg
, NULL
);
1483 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1488 cm_id
->state
= IB_CM_REP_SENT
;
1489 cm_id_priv
->msg
= msg
;
1490 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1491 cm_id_priv
->responder_resources
= param
->responder_resources
;
1492 cm_id_priv
->rq_psn
= cm_rep_get_starting_psn(rep_msg
);
1493 cm_id_priv
->local_qpn
= cm_rep_get_local_qpn(rep_msg
);
1495 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1498 EXPORT_SYMBOL(ib_send_cm_rep
);
1500 static void cm_format_rtu(struct cm_rtu_msg
*rtu_msg
,
1501 struct cm_id_private
*cm_id_priv
,
1502 const void *private_data
,
1503 u8 private_data_len
)
1505 cm_format_mad_hdr(&rtu_msg
->hdr
, CM_RTU_ATTR_ID
, cm_id_priv
->tid
);
1506 rtu_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1507 rtu_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1509 if (private_data
&& private_data_len
)
1510 memcpy(rtu_msg
->private_data
, private_data
, private_data_len
);
1513 int ib_send_cm_rtu(struct ib_cm_id
*cm_id
,
1514 const void *private_data
,
1515 u8 private_data_len
)
1517 struct cm_id_private
*cm_id_priv
;
1518 struct ib_mad_send_buf
*msg
;
1519 unsigned long flags
;
1523 if (private_data
&& private_data_len
> IB_CM_RTU_PRIVATE_DATA_SIZE
)
1526 data
= cm_copy_private_data(private_data
, private_data_len
);
1528 return PTR_ERR(data
);
1530 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1531 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1532 if (cm_id
->state
!= IB_CM_REP_RCVD
&&
1533 cm_id
->state
!= IB_CM_MRA_REP_SENT
) {
1538 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1542 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1543 private_data
, private_data_len
);
1545 ret
= ib_post_send_mad(msg
, NULL
);
1547 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1553 cm_id
->state
= IB_CM_ESTABLISHED
;
1554 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1555 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1558 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1562 EXPORT_SYMBOL(ib_send_cm_rtu
);
1564 static void cm_format_rep_event(struct cm_work
*work
)
1566 struct cm_rep_msg
*rep_msg
;
1567 struct ib_cm_rep_event_param
*param
;
1569 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1570 param
= &work
->cm_event
.param
.rep_rcvd
;
1571 param
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1572 param
->remote_qkey
= be32_to_cpu(rep_msg
->local_qkey
);
1573 param
->remote_qpn
= be32_to_cpu(cm_rep_get_local_qpn(rep_msg
));
1574 param
->starting_psn
= be32_to_cpu(cm_rep_get_starting_psn(rep_msg
));
1575 param
->responder_resources
= rep_msg
->initiator_depth
;
1576 param
->initiator_depth
= rep_msg
->resp_resources
;
1577 param
->target_ack_delay
= cm_rep_get_target_ack_delay(rep_msg
);
1578 param
->failover_accepted
= cm_rep_get_failover(rep_msg
);
1579 param
->flow_control
= cm_rep_get_flow_ctrl(rep_msg
);
1580 param
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1581 param
->srq
= cm_rep_get_srq(rep_msg
);
1582 work
->cm_event
.private_data
= &rep_msg
->private_data
;
1585 static void cm_dup_rep_handler(struct cm_work
*work
)
1587 struct cm_id_private
*cm_id_priv
;
1588 struct cm_rep_msg
*rep_msg
;
1589 struct ib_mad_send_buf
*msg
= NULL
;
1590 unsigned long flags
;
1593 rep_msg
= (struct cm_rep_msg
*) work
->mad_recv_wc
->recv_buf
.mad
;
1594 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
,
1595 rep_msg
->local_comm_id
);
1599 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1603 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1604 if (cm_id_priv
->id
.state
== IB_CM_ESTABLISHED
)
1605 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1606 cm_id_priv
->private_data
,
1607 cm_id_priv
->private_data_len
);
1608 else if (cm_id_priv
->id
.state
== IB_CM_MRA_REP_SENT
)
1609 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1610 CM_MSG_RESPONSE_REP
, cm_id_priv
->service_timeout
,
1611 cm_id_priv
->private_data
,
1612 cm_id_priv
->private_data_len
);
1615 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1617 ret
= ib_post_send_mad(msg
, NULL
);
1622 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1623 free
: cm_free_msg(msg
);
1624 deref
: cm_deref_id(cm_id_priv
);
1627 static int cm_rep_handler(struct cm_work
*work
)
1629 struct cm_id_private
*cm_id_priv
;
1630 struct cm_rep_msg
*rep_msg
;
1631 unsigned long flags
;
1634 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1635 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
, 0);
1637 cm_dup_rep_handler(work
);
1641 cm_format_rep_event(work
);
1643 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1644 switch (cm_id_priv
->id
.state
) {
1645 case IB_CM_REQ_SENT
:
1646 case IB_CM_MRA_REQ_RCVD
:
1649 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1654 cm_id_priv
->timewait_info
->work
.remote_id
= rep_msg
->local_comm_id
;
1655 cm_id_priv
->timewait_info
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1656 cm_id_priv
->timewait_info
->remote_qpn
= cm_rep_get_local_qpn(rep_msg
);
1658 spin_lock(&cm
.lock
);
1659 /* Check for duplicate REP. */
1660 if (cm_insert_remote_id(cm_id_priv
->timewait_info
)) {
1661 spin_unlock(&cm
.lock
);
1662 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1666 /* Check for a stale connection. */
1667 if (cm_insert_remote_qpn(cm_id_priv
->timewait_info
)) {
1668 rb_erase(&cm_id_priv
->timewait_info
->remote_id_node
,
1669 &cm
.remote_id_table
);
1670 cm_id_priv
->timewait_info
->inserted_remote_id
= 0;
1671 spin_unlock(&cm
.lock
);
1672 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1673 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1674 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REP
,
1679 spin_unlock(&cm
.lock
);
1681 cm_id_priv
->id
.state
= IB_CM_REP_RCVD
;
1682 cm_id_priv
->id
.remote_id
= rep_msg
->local_comm_id
;
1683 cm_id_priv
->remote_qpn
= cm_rep_get_local_qpn(rep_msg
);
1684 cm_id_priv
->initiator_depth
= rep_msg
->resp_resources
;
1685 cm_id_priv
->responder_resources
= rep_msg
->initiator_depth
;
1686 cm_id_priv
->sq_psn
= cm_rep_get_starting_psn(rep_msg
);
1687 cm_id_priv
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1689 /* todo: handle peer_to_peer */
1691 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1692 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1694 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1695 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1698 cm_process_work(cm_id_priv
, work
);
1700 cm_deref_id(cm_id_priv
);
1704 cm_deref_id(cm_id_priv
);
1708 static int cm_establish_handler(struct cm_work
*work
)
1710 struct cm_id_private
*cm_id_priv
;
1711 unsigned long flags
;
1714 /* See comment in ib_cm_establish about lookup. */
1715 cm_id_priv
= cm_acquire_id(work
->local_id
, work
->remote_id
);
1719 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1720 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
) {
1721 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1725 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1726 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1728 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1729 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1732 cm_process_work(cm_id_priv
, work
);
1734 cm_deref_id(cm_id_priv
);
1737 cm_deref_id(cm_id_priv
);
1741 static int cm_rtu_handler(struct cm_work
*work
)
1743 struct cm_id_private
*cm_id_priv
;
1744 struct cm_rtu_msg
*rtu_msg
;
1745 unsigned long flags
;
1748 rtu_msg
= (struct cm_rtu_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1749 cm_id_priv
= cm_acquire_id(rtu_msg
->remote_comm_id
,
1750 rtu_msg
->local_comm_id
);
1754 work
->cm_event
.private_data
= &rtu_msg
->private_data
;
1756 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1757 if (cm_id_priv
->id
.state
!= IB_CM_REP_SENT
&&
1758 cm_id_priv
->id
.state
!= IB_CM_MRA_REP_RCVD
) {
1759 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1762 cm_id_priv
->id
.state
= IB_CM_ESTABLISHED
;
1764 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1765 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1767 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1768 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1771 cm_process_work(cm_id_priv
, work
);
1773 cm_deref_id(cm_id_priv
);
1776 cm_deref_id(cm_id_priv
);
1780 static void cm_format_dreq(struct cm_dreq_msg
*dreq_msg
,
1781 struct cm_id_private
*cm_id_priv
,
1782 const void *private_data
,
1783 u8 private_data_len
)
1785 cm_format_mad_hdr(&dreq_msg
->hdr
, CM_DREQ_ATTR_ID
,
1786 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_DREQ
));
1787 dreq_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1788 dreq_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1789 cm_dreq_set_remote_qpn(dreq_msg
, cm_id_priv
->remote_qpn
);
1791 if (private_data
&& private_data_len
)
1792 memcpy(dreq_msg
->private_data
, private_data
, private_data_len
);
1795 int ib_send_cm_dreq(struct ib_cm_id
*cm_id
,
1796 const void *private_data
,
1797 u8 private_data_len
)
1799 struct cm_id_private
*cm_id_priv
;
1800 struct ib_mad_send_buf
*msg
;
1801 unsigned long flags
;
1804 if (private_data
&& private_data_len
> IB_CM_DREQ_PRIVATE_DATA_SIZE
)
1807 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1808 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1809 if (cm_id
->state
!= IB_CM_ESTABLISHED
) {
1814 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1816 cm_enter_timewait(cm_id_priv
);
1820 cm_format_dreq((struct cm_dreq_msg
*) msg
->mad
, cm_id_priv
,
1821 private_data
, private_data_len
);
1822 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1823 msg
->context
[1] = (void *) (unsigned long) IB_CM_DREQ_SENT
;
1825 ret
= ib_post_send_mad(msg
, NULL
);
1827 cm_enter_timewait(cm_id_priv
);
1828 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1833 cm_id
->state
= IB_CM_DREQ_SENT
;
1834 cm_id_priv
->msg
= msg
;
1835 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1838 EXPORT_SYMBOL(ib_send_cm_dreq
);
1840 static void cm_format_drep(struct cm_drep_msg
*drep_msg
,
1841 struct cm_id_private
*cm_id_priv
,
1842 const void *private_data
,
1843 u8 private_data_len
)
1845 cm_format_mad_hdr(&drep_msg
->hdr
, CM_DREP_ATTR_ID
, cm_id_priv
->tid
);
1846 drep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1847 drep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1849 if (private_data
&& private_data_len
)
1850 memcpy(drep_msg
->private_data
, private_data
, private_data_len
);
1853 int ib_send_cm_drep(struct ib_cm_id
*cm_id
,
1854 const void *private_data
,
1855 u8 private_data_len
)
1857 struct cm_id_private
*cm_id_priv
;
1858 struct ib_mad_send_buf
*msg
;
1859 unsigned long flags
;
1863 if (private_data
&& private_data_len
> IB_CM_DREP_PRIVATE_DATA_SIZE
)
1866 data
= cm_copy_private_data(private_data
, private_data_len
);
1868 return PTR_ERR(data
);
1870 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1871 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1872 if (cm_id
->state
!= IB_CM_DREQ_RCVD
) {
1873 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1878 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1879 cm_enter_timewait(cm_id_priv
);
1881 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1885 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
1886 private_data
, private_data_len
);
1888 ret
= ib_post_send_mad(msg
, NULL
);
1890 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1895 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1898 EXPORT_SYMBOL(ib_send_cm_drep
);
1900 static int cm_dreq_handler(struct cm_work
*work
)
1902 struct cm_id_private
*cm_id_priv
;
1903 struct cm_dreq_msg
*dreq_msg
;
1904 struct ib_mad_send_buf
*msg
= NULL
;
1905 unsigned long flags
;
1908 dreq_msg
= (struct cm_dreq_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1909 cm_id_priv
= cm_acquire_id(dreq_msg
->remote_comm_id
,
1910 dreq_msg
->local_comm_id
);
1914 work
->cm_event
.private_data
= &dreq_msg
->private_data
;
1916 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1917 if (cm_id_priv
->local_qpn
!= cm_dreq_get_remote_qpn(dreq_msg
))
1920 switch (cm_id_priv
->id
.state
) {
1921 case IB_CM_REP_SENT
:
1922 case IB_CM_DREQ_SENT
:
1923 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1925 case IB_CM_ESTABLISHED
:
1926 case IB_CM_MRA_REP_RCVD
:
1928 case IB_CM_TIMEWAIT
:
1929 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
1932 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
1933 cm_id_priv
->private_data
,
1934 cm_id_priv
->private_data_len
);
1935 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1937 if (ib_post_send_mad(msg
, NULL
))
1943 cm_id_priv
->id
.state
= IB_CM_DREQ_RCVD
;
1944 cm_id_priv
->tid
= dreq_msg
->hdr
.tid
;
1945 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1947 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1948 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1951 cm_process_work(cm_id_priv
, work
);
1953 cm_deref_id(cm_id_priv
);
1956 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1957 deref
: cm_deref_id(cm_id_priv
);
1961 static int cm_drep_handler(struct cm_work
*work
)
1963 struct cm_id_private
*cm_id_priv
;
1964 struct cm_drep_msg
*drep_msg
;
1965 unsigned long flags
;
1968 drep_msg
= (struct cm_drep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1969 cm_id_priv
= cm_acquire_id(drep_msg
->remote_comm_id
,
1970 drep_msg
->local_comm_id
);
1974 work
->cm_event
.private_data
= &drep_msg
->private_data
;
1976 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1977 if (cm_id_priv
->id
.state
!= IB_CM_DREQ_SENT
&&
1978 cm_id_priv
->id
.state
!= IB_CM_DREQ_RCVD
) {
1979 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1982 cm_enter_timewait(cm_id_priv
);
1984 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1985 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1987 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1988 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1991 cm_process_work(cm_id_priv
, work
);
1993 cm_deref_id(cm_id_priv
);
1996 cm_deref_id(cm_id_priv
);
2000 int ib_send_cm_rej(struct ib_cm_id
*cm_id
,
2001 enum ib_cm_rej_reason reason
,
2004 const void *private_data
,
2005 u8 private_data_len
)
2007 struct cm_id_private
*cm_id_priv
;
2008 struct ib_mad_send_buf
*msg
;
2009 unsigned long flags
;
2012 if ((private_data
&& private_data_len
> IB_CM_REJ_PRIVATE_DATA_SIZE
) ||
2013 (ari
&& ari_length
> IB_CM_REJ_ARI_LENGTH
))
2016 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2018 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2019 switch (cm_id
->state
) {
2020 case IB_CM_REQ_SENT
:
2021 case IB_CM_MRA_REQ_RCVD
:
2022 case IB_CM_REQ_RCVD
:
2023 case IB_CM_MRA_REQ_SENT
:
2024 case IB_CM_REP_RCVD
:
2025 case IB_CM_MRA_REP_SENT
:
2026 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2028 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
2029 cm_id_priv
, reason
, ari
, ari_length
,
2030 private_data
, private_data_len
);
2032 cm_reset_to_idle(cm_id_priv
);
2034 case IB_CM_REP_SENT
:
2035 case IB_CM_MRA_REP_RCVD
:
2036 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2038 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
2039 cm_id_priv
, reason
, ari
, ari_length
,
2040 private_data
, private_data_len
);
2042 cm_enter_timewait(cm_id_priv
);
2052 ret
= ib_post_send_mad(msg
, NULL
);
2056 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2059 EXPORT_SYMBOL(ib_send_cm_rej
);
2061 static void cm_format_rej_event(struct cm_work
*work
)
2063 struct cm_rej_msg
*rej_msg
;
2064 struct ib_cm_rej_event_param
*param
;
2066 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2067 param
= &work
->cm_event
.param
.rej_rcvd
;
2068 param
->ari
= rej_msg
->ari
;
2069 param
->ari_length
= cm_rej_get_reject_info_len(rej_msg
);
2070 param
->reason
= __be16_to_cpu(rej_msg
->reason
);
2071 work
->cm_event
.private_data
= &rej_msg
->private_data
;
2074 static struct cm_id_private
* cm_acquire_rejected_id(struct cm_rej_msg
*rej_msg
)
2076 struct cm_timewait_info
*timewait_info
;
2077 struct cm_id_private
*cm_id_priv
;
2078 unsigned long flags
;
2081 remote_id
= rej_msg
->local_comm_id
;
2083 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_TIMEOUT
) {
2084 spin_lock_irqsave(&cm
.lock
, flags
);
2085 timewait_info
= cm_find_remote_id( *((__be64
*) rej_msg
->ari
),
2087 if (!timewait_info
) {
2088 spin_unlock_irqrestore(&cm
.lock
, flags
);
2091 cm_id_priv
= idr_find(&cm
.local_id_table
, (__force
int)
2092 (timewait_info
->work
.local_id
^
2093 cm
.random_id_operand
));
2095 if (cm_id_priv
->id
.remote_id
== remote_id
)
2096 atomic_inc(&cm_id_priv
->refcount
);
2100 spin_unlock_irqrestore(&cm
.lock
, flags
);
2101 } else if (cm_rej_get_msg_rejected(rej_msg
) == CM_MSG_RESPONSE_REQ
)
2102 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, 0);
2104 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, remote_id
);
2109 static int cm_rej_handler(struct cm_work
*work
)
2111 struct cm_id_private
*cm_id_priv
;
2112 struct cm_rej_msg
*rej_msg
;
2113 unsigned long flags
;
2116 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2117 cm_id_priv
= cm_acquire_rejected_id(rej_msg
);
2121 cm_format_rej_event(work
);
2123 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2124 switch (cm_id_priv
->id
.state
) {
2125 case IB_CM_REQ_SENT
:
2126 case IB_CM_MRA_REQ_RCVD
:
2127 case IB_CM_REP_SENT
:
2128 case IB_CM_MRA_REP_RCVD
:
2129 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2131 case IB_CM_REQ_RCVD
:
2132 case IB_CM_MRA_REQ_SENT
:
2133 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_STALE_CONN
)
2134 cm_enter_timewait(cm_id_priv
);
2136 cm_reset_to_idle(cm_id_priv
);
2138 case IB_CM_DREQ_SENT
:
2139 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2141 case IB_CM_REP_RCVD
:
2142 case IB_CM_MRA_REP_SENT
:
2143 case IB_CM_ESTABLISHED
:
2144 cm_enter_timewait(cm_id_priv
);
2147 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2152 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2154 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2155 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2158 cm_process_work(cm_id_priv
, work
);
2160 cm_deref_id(cm_id_priv
);
2163 cm_deref_id(cm_id_priv
);
2167 int ib_send_cm_mra(struct ib_cm_id
*cm_id
,
2169 const void *private_data
,
2170 u8 private_data_len
)
2172 struct cm_id_private
*cm_id_priv
;
2173 struct ib_mad_send_buf
*msg
;
2175 unsigned long flags
;
2178 if (private_data
&& private_data_len
> IB_CM_MRA_PRIVATE_DATA_SIZE
)
2181 data
= cm_copy_private_data(private_data
, private_data_len
);
2183 return PTR_ERR(data
);
2185 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2187 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2188 switch(cm_id_priv
->id
.state
) {
2189 case IB_CM_REQ_RCVD
:
2190 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2194 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2195 CM_MSG_RESPONSE_REQ
, service_timeout
,
2196 private_data
, private_data_len
);
2197 ret
= ib_post_send_mad(msg
, NULL
);
2200 cm_id
->state
= IB_CM_MRA_REQ_SENT
;
2202 case IB_CM_REP_RCVD
:
2203 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2207 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2208 CM_MSG_RESPONSE_REP
, service_timeout
,
2209 private_data
, private_data_len
);
2210 ret
= ib_post_send_mad(msg
, NULL
);
2213 cm_id
->state
= IB_CM_MRA_REP_SENT
;
2215 case IB_CM_ESTABLISHED
:
2216 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2220 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2221 CM_MSG_RESPONSE_OTHER
, service_timeout
,
2222 private_data
, private_data_len
);
2223 ret
= ib_post_send_mad(msg
, NULL
);
2226 cm_id
->lap_state
= IB_CM_MRA_LAP_SENT
;
2232 cm_id_priv
->service_timeout
= service_timeout
;
2233 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
2234 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2237 error1
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2241 error2
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2246 EXPORT_SYMBOL(ib_send_cm_mra
);
2248 static struct cm_id_private
* cm_acquire_mraed_id(struct cm_mra_msg
*mra_msg
)
2250 switch (cm_mra_get_msg_mraed(mra_msg
)) {
2251 case CM_MSG_RESPONSE_REQ
:
2252 return cm_acquire_id(mra_msg
->remote_comm_id
, 0);
2253 case CM_MSG_RESPONSE_REP
:
2254 case CM_MSG_RESPONSE_OTHER
:
2255 return cm_acquire_id(mra_msg
->remote_comm_id
,
2256 mra_msg
->local_comm_id
);
2262 static int cm_mra_handler(struct cm_work
*work
)
2264 struct cm_id_private
*cm_id_priv
;
2265 struct cm_mra_msg
*mra_msg
;
2266 unsigned long flags
;
2269 mra_msg
= (struct cm_mra_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2270 cm_id_priv
= cm_acquire_mraed_id(mra_msg
);
2274 work
->cm_event
.private_data
= &mra_msg
->private_data
;
2275 work
->cm_event
.param
.mra_rcvd
.service_timeout
=
2276 cm_mra_get_service_timeout(mra_msg
);
2277 timeout
= cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg
)) +
2278 cm_convert_to_ms(cm_id_priv
->av
.packet_life_time
);
2280 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2281 switch (cm_id_priv
->id
.state
) {
2282 case IB_CM_REQ_SENT
:
2283 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REQ
||
2284 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2285 cm_id_priv
->msg
, timeout
))
2287 cm_id_priv
->id
.state
= IB_CM_MRA_REQ_RCVD
;
2289 case IB_CM_REP_SENT
:
2290 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REP
||
2291 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2292 cm_id_priv
->msg
, timeout
))
2294 cm_id_priv
->id
.state
= IB_CM_MRA_REP_RCVD
;
2296 case IB_CM_ESTABLISHED
:
2297 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_OTHER
||
2298 cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
||
2299 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2300 cm_id_priv
->msg
, timeout
))
2302 cm_id_priv
->id
.lap_state
= IB_CM_MRA_LAP_RCVD
;
2308 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long)
2309 cm_id_priv
->id
.state
;
2310 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2312 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2313 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2316 cm_process_work(cm_id_priv
, work
);
2318 cm_deref_id(cm_id_priv
);
2321 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2322 cm_deref_id(cm_id_priv
);
2326 static void cm_format_lap(struct cm_lap_msg
*lap_msg
,
2327 struct cm_id_private
*cm_id_priv
,
2328 struct ib_sa_path_rec
*alternate_path
,
2329 const void *private_data
,
2330 u8 private_data_len
)
2332 cm_format_mad_hdr(&lap_msg
->hdr
, CM_LAP_ATTR_ID
,
2333 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_LAP
));
2334 lap_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2335 lap_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2336 cm_lap_set_remote_qpn(lap_msg
, cm_id_priv
->remote_qpn
);
2337 /* todo: need remote CM response timeout */
2338 cm_lap_set_remote_resp_timeout(lap_msg
, 0x1F);
2339 lap_msg
->alt_local_lid
= alternate_path
->slid
;
2340 lap_msg
->alt_remote_lid
= alternate_path
->dlid
;
2341 lap_msg
->alt_local_gid
= alternate_path
->sgid
;
2342 lap_msg
->alt_remote_gid
= alternate_path
->dgid
;
2343 cm_lap_set_flow_label(lap_msg
, alternate_path
->flow_label
);
2344 cm_lap_set_traffic_class(lap_msg
, alternate_path
->traffic_class
);
2345 lap_msg
->alt_hop_limit
= alternate_path
->hop_limit
;
2346 cm_lap_set_packet_rate(lap_msg
, alternate_path
->rate
);
2347 cm_lap_set_sl(lap_msg
, alternate_path
->sl
);
2348 cm_lap_set_subnet_local(lap_msg
, 1); /* local only... */
2349 cm_lap_set_local_ack_timeout(lap_msg
,
2350 min(31, alternate_path
->packet_life_time
+ 1));
2352 if (private_data
&& private_data_len
)
2353 memcpy(lap_msg
->private_data
, private_data
, private_data_len
);
2356 int ib_send_cm_lap(struct ib_cm_id
*cm_id
,
2357 struct ib_sa_path_rec
*alternate_path
,
2358 const void *private_data
,
2359 u8 private_data_len
)
2361 struct cm_id_private
*cm_id_priv
;
2362 struct ib_mad_send_buf
*msg
;
2363 unsigned long flags
;
2366 if (private_data
&& private_data_len
> IB_CM_LAP_PRIVATE_DATA_SIZE
)
2369 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2370 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2371 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2372 cm_id
->lap_state
!= IB_CM_LAP_IDLE
) {
2377 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2381 cm_format_lap((struct cm_lap_msg
*) msg
->mad
, cm_id_priv
,
2382 alternate_path
, private_data
, private_data_len
);
2383 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2384 msg
->context
[1] = (void *) (unsigned long) IB_CM_ESTABLISHED
;
2386 ret
= ib_post_send_mad(msg
, NULL
);
2388 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2393 cm_id
->lap_state
= IB_CM_LAP_SENT
;
2394 cm_id_priv
->msg
= msg
;
2396 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2399 EXPORT_SYMBOL(ib_send_cm_lap
);
2401 static void cm_format_path_from_lap(struct ib_sa_path_rec
*path
,
2402 struct cm_lap_msg
*lap_msg
)
2404 memset(path
, 0, sizeof *path
);
2405 path
->dgid
= lap_msg
->alt_local_gid
;
2406 path
->sgid
= lap_msg
->alt_remote_gid
;
2407 path
->dlid
= lap_msg
->alt_local_lid
;
2408 path
->slid
= lap_msg
->alt_remote_lid
;
2409 path
->flow_label
= cm_lap_get_flow_label(lap_msg
);
2410 path
->hop_limit
= lap_msg
->alt_hop_limit
;
2411 path
->traffic_class
= cm_lap_get_traffic_class(lap_msg
);
2412 path
->reversible
= 1;
2413 /* pkey is same as in REQ */
2414 path
->sl
= cm_lap_get_sl(lap_msg
);
2415 path
->mtu_selector
= IB_SA_EQ
;
2416 /* mtu is same as in REQ */
2417 path
->rate_selector
= IB_SA_EQ
;
2418 path
->rate
= cm_lap_get_packet_rate(lap_msg
);
2419 path
->packet_life_time_selector
= IB_SA_EQ
;
2420 path
->packet_life_time
= cm_lap_get_local_ack_timeout(lap_msg
);
2421 path
->packet_life_time
-= (path
->packet_life_time
> 0);
2424 static int cm_lap_handler(struct cm_work
*work
)
2426 struct cm_id_private
*cm_id_priv
;
2427 struct cm_lap_msg
*lap_msg
;
2428 struct ib_cm_lap_event_param
*param
;
2429 struct ib_mad_send_buf
*msg
= NULL
;
2430 unsigned long flags
;
2433 /* todo: verify LAP request and send reject APR if invalid. */
2434 lap_msg
= (struct cm_lap_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2435 cm_id_priv
= cm_acquire_id(lap_msg
->remote_comm_id
,
2436 lap_msg
->local_comm_id
);
2440 param
= &work
->cm_event
.param
.lap_rcvd
;
2441 param
->alternate_path
= &work
->path
[0];
2442 cm_format_path_from_lap(param
->alternate_path
, lap_msg
);
2443 work
->cm_event
.private_data
= &lap_msg
->private_data
;
2445 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2446 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
)
2449 switch (cm_id_priv
->id
.lap_state
) {
2450 case IB_CM_LAP_IDLE
:
2452 case IB_CM_MRA_LAP_SENT
:
2453 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
2456 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2457 CM_MSG_RESPONSE_OTHER
,
2458 cm_id_priv
->service_timeout
,
2459 cm_id_priv
->private_data
,
2460 cm_id_priv
->private_data_len
);
2461 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2463 if (ib_post_send_mad(msg
, NULL
))
2470 cm_id_priv
->id
.lap_state
= IB_CM_LAP_RCVD
;
2471 cm_id_priv
->tid
= lap_msg
->hdr
.tid
;
2472 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2474 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2475 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2478 cm_process_work(cm_id_priv
, work
);
2480 cm_deref_id(cm_id_priv
);
2483 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2484 deref
: cm_deref_id(cm_id_priv
);
2488 static void cm_format_apr(struct cm_apr_msg
*apr_msg
,
2489 struct cm_id_private
*cm_id_priv
,
2490 enum ib_cm_apr_status status
,
2493 const void *private_data
,
2494 u8 private_data_len
)
2496 cm_format_mad_hdr(&apr_msg
->hdr
, CM_APR_ATTR_ID
, cm_id_priv
->tid
);
2497 apr_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2498 apr_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2499 apr_msg
->ap_status
= (u8
) status
;
2501 if (info
&& info_length
) {
2502 apr_msg
->info_length
= info_length
;
2503 memcpy(apr_msg
->info
, info
, info_length
);
2506 if (private_data
&& private_data_len
)
2507 memcpy(apr_msg
->private_data
, private_data
, private_data_len
);
2510 int ib_send_cm_apr(struct ib_cm_id
*cm_id
,
2511 enum ib_cm_apr_status status
,
2514 const void *private_data
,
2515 u8 private_data_len
)
2517 struct cm_id_private
*cm_id_priv
;
2518 struct ib_mad_send_buf
*msg
;
2519 unsigned long flags
;
2522 if ((private_data
&& private_data_len
> IB_CM_APR_PRIVATE_DATA_SIZE
) ||
2523 (info
&& info_length
> IB_CM_APR_INFO_LENGTH
))
2526 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2527 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2528 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2529 (cm_id
->lap_state
!= IB_CM_LAP_RCVD
&&
2530 cm_id
->lap_state
!= IB_CM_MRA_LAP_SENT
)) {
2535 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2539 cm_format_apr((struct cm_apr_msg
*) msg
->mad
, cm_id_priv
, status
,
2540 info
, info_length
, private_data
, private_data_len
);
2541 ret
= ib_post_send_mad(msg
, NULL
);
2543 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2548 cm_id
->lap_state
= IB_CM_LAP_IDLE
;
2549 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2552 EXPORT_SYMBOL(ib_send_cm_apr
);
2554 static int cm_apr_handler(struct cm_work
*work
)
2556 struct cm_id_private
*cm_id_priv
;
2557 struct cm_apr_msg
*apr_msg
;
2558 unsigned long flags
;
2561 apr_msg
= (struct cm_apr_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2562 cm_id_priv
= cm_acquire_id(apr_msg
->remote_comm_id
,
2563 apr_msg
->local_comm_id
);
2565 return -EINVAL
; /* Unmatched reply. */
2567 work
->cm_event
.param
.apr_rcvd
.ap_status
= apr_msg
->ap_status
;
2568 work
->cm_event
.param
.apr_rcvd
.apr_info
= &apr_msg
->info
;
2569 work
->cm_event
.param
.apr_rcvd
.info_len
= apr_msg
->info_length
;
2570 work
->cm_event
.private_data
= &apr_msg
->private_data
;
2572 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2573 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
||
2574 (cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
&&
2575 cm_id_priv
->id
.lap_state
!= IB_CM_MRA_LAP_RCVD
)) {
2576 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2579 cm_id_priv
->id
.lap_state
= IB_CM_LAP_IDLE
;
2580 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2581 cm_id_priv
->msg
= NULL
;
2583 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2585 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2586 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2589 cm_process_work(cm_id_priv
, work
);
2591 cm_deref_id(cm_id_priv
);
2594 cm_deref_id(cm_id_priv
);
2598 static int cm_timewait_handler(struct cm_work
*work
)
2600 struct cm_timewait_info
*timewait_info
;
2601 struct cm_id_private
*cm_id_priv
;
2602 unsigned long flags
;
2605 timewait_info
= (struct cm_timewait_info
*)work
;
2606 cm_cleanup_timewait(timewait_info
);
2608 cm_id_priv
= cm_acquire_id(timewait_info
->work
.local_id
,
2609 timewait_info
->work
.remote_id
);
2613 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2614 if (cm_id_priv
->id
.state
!= IB_CM_TIMEWAIT
||
2615 cm_id_priv
->remote_qpn
!= timewait_info
->remote_qpn
) {
2616 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2619 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2620 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2622 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2623 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2626 cm_process_work(cm_id_priv
, work
);
2628 cm_deref_id(cm_id_priv
);
2631 cm_deref_id(cm_id_priv
);
2635 static void cm_format_sidr_req(struct cm_sidr_req_msg
*sidr_req_msg
,
2636 struct cm_id_private
*cm_id_priv
,
2637 struct ib_cm_sidr_req_param
*param
)
2639 cm_format_mad_hdr(&sidr_req_msg
->hdr
, CM_SIDR_REQ_ATTR_ID
,
2640 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_SIDR
));
2641 sidr_req_msg
->request_id
= cm_id_priv
->id
.local_id
;
2642 sidr_req_msg
->pkey
= cpu_to_be16(param
->path
->pkey
);
2643 sidr_req_msg
->service_id
= param
->service_id
;
2645 if (param
->private_data
&& param
->private_data_len
)
2646 memcpy(sidr_req_msg
->private_data
, param
->private_data
,
2647 param
->private_data_len
);
2650 int ib_send_cm_sidr_req(struct ib_cm_id
*cm_id
,
2651 struct ib_cm_sidr_req_param
*param
)
2653 struct cm_id_private
*cm_id_priv
;
2654 struct ib_mad_send_buf
*msg
;
2655 unsigned long flags
;
2658 if (!param
->path
|| (param
->private_data
&&
2659 param
->private_data_len
> IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
))
2662 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2663 ret
= cm_init_av_by_path(param
->path
, &cm_id_priv
->av
);
2667 cm_id
->service_id
= param
->service_id
;
2668 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
2669 cm_id_priv
->timeout_ms
= param
->timeout_ms
;
2670 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
2671 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2675 cm_format_sidr_req((struct cm_sidr_req_msg
*) msg
->mad
, cm_id_priv
,
2677 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2678 msg
->context
[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT
;
2680 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2681 if (cm_id
->state
== IB_CM_IDLE
)
2682 ret
= ib_post_send_mad(msg
, NULL
);
2687 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2691 cm_id
->state
= IB_CM_SIDR_REQ_SENT
;
2692 cm_id_priv
->msg
= msg
;
2693 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2697 EXPORT_SYMBOL(ib_send_cm_sidr_req
);
2699 static void cm_format_sidr_req_event(struct cm_work
*work
,
2700 struct ib_cm_id
*listen_id
)
2702 struct cm_sidr_req_msg
*sidr_req_msg
;
2703 struct ib_cm_sidr_req_event_param
*param
;
2705 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2706 work
->mad_recv_wc
->recv_buf
.mad
;
2707 param
= &work
->cm_event
.param
.sidr_req_rcvd
;
2708 param
->pkey
= __be16_to_cpu(sidr_req_msg
->pkey
);
2709 param
->listen_id
= listen_id
;
2710 param
->port
= work
->port
->port_num
;
2711 work
->cm_event
.private_data
= &sidr_req_msg
->private_data
;
2714 static int cm_sidr_req_handler(struct cm_work
*work
)
2716 struct ib_cm_id
*cm_id
;
2717 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
2718 struct cm_sidr_req_msg
*sidr_req_msg
;
2720 unsigned long flags
;
2722 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->device
, NULL
, NULL
);
2724 return PTR_ERR(cm_id
);
2725 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2727 /* Record SGID/SLID and request ID for lookup. */
2728 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2729 work
->mad_recv_wc
->recv_buf
.mad
;
2730 wc
= work
->mad_recv_wc
->wc
;
2731 cm_id_priv
->av
.dgid
.global
.subnet_prefix
= cpu_to_be64(wc
->slid
);
2732 cm_id_priv
->av
.dgid
.global
.interface_id
= 0;
2733 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
2734 work
->mad_recv_wc
->recv_buf
.grh
,
2736 cm_id_priv
->id
.remote_id
= sidr_req_msg
->request_id
;
2737 cm_id_priv
->id
.state
= IB_CM_SIDR_REQ_RCVD
;
2738 cm_id_priv
->tid
= sidr_req_msg
->hdr
.tid
;
2739 atomic_inc(&cm_id_priv
->work_count
);
2741 spin_lock_irqsave(&cm
.lock
, flags
);
2742 cur_cm_id_priv
= cm_insert_remote_sidr(cm_id_priv
);
2743 if (cur_cm_id_priv
) {
2744 spin_unlock_irqrestore(&cm
.lock
, flags
);
2745 goto out
; /* Duplicate message. */
2747 cur_cm_id_priv
= cm_find_listen(cm_id
->device
,
2748 sidr_req_msg
->service_id
,
2749 sidr_req_msg
->private_data
);
2750 if (!cur_cm_id_priv
) {
2751 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
2752 spin_unlock_irqrestore(&cm
.lock
, flags
);
2753 /* todo: reply with no match */
2754 goto out
; /* No match. */
2756 atomic_inc(&cur_cm_id_priv
->refcount
);
2757 spin_unlock_irqrestore(&cm
.lock
, flags
);
2759 cm_id_priv
->id
.cm_handler
= cur_cm_id_priv
->id
.cm_handler
;
2760 cm_id_priv
->id
.context
= cur_cm_id_priv
->id
.context
;
2761 cm_id_priv
->id
.service_id
= sidr_req_msg
->service_id
;
2762 cm_id_priv
->id
.service_mask
= __constant_cpu_to_be64(~0ULL);
2764 cm_format_sidr_req_event(work
, &cur_cm_id_priv
->id
);
2765 cm_process_work(cm_id_priv
, work
);
2766 cm_deref_id(cur_cm_id_priv
);
2769 ib_destroy_cm_id(&cm_id_priv
->id
);
2773 static void cm_format_sidr_rep(struct cm_sidr_rep_msg
*sidr_rep_msg
,
2774 struct cm_id_private
*cm_id_priv
,
2775 struct ib_cm_sidr_rep_param
*param
)
2777 cm_format_mad_hdr(&sidr_rep_msg
->hdr
, CM_SIDR_REP_ATTR_ID
,
2779 sidr_rep_msg
->request_id
= cm_id_priv
->id
.remote_id
;
2780 sidr_rep_msg
->status
= param
->status
;
2781 cm_sidr_rep_set_qpn(sidr_rep_msg
, cpu_to_be32(param
->qp_num
));
2782 sidr_rep_msg
->service_id
= cm_id_priv
->id
.service_id
;
2783 sidr_rep_msg
->qkey
= cpu_to_be32(param
->qkey
);
2785 if (param
->info
&& param
->info_length
)
2786 memcpy(sidr_rep_msg
->info
, param
->info
, param
->info_length
);
2788 if (param
->private_data
&& param
->private_data_len
)
2789 memcpy(sidr_rep_msg
->private_data
, param
->private_data
,
2790 param
->private_data_len
);
2793 int ib_send_cm_sidr_rep(struct ib_cm_id
*cm_id
,
2794 struct ib_cm_sidr_rep_param
*param
)
2796 struct cm_id_private
*cm_id_priv
;
2797 struct ib_mad_send_buf
*msg
;
2798 unsigned long flags
;
2801 if ((param
->info
&& param
->info_length
> IB_CM_SIDR_REP_INFO_LENGTH
) ||
2802 (param
->private_data
&&
2803 param
->private_data_len
> IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
))
2806 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2807 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2808 if (cm_id
->state
!= IB_CM_SIDR_REQ_RCVD
) {
2813 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2817 cm_format_sidr_rep((struct cm_sidr_rep_msg
*) msg
->mad
, cm_id_priv
,
2819 ret
= ib_post_send_mad(msg
, NULL
);
2821 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2825 cm_id
->state
= IB_CM_IDLE
;
2826 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2828 spin_lock_irqsave(&cm
.lock
, flags
);
2829 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
2830 spin_unlock_irqrestore(&cm
.lock
, flags
);
2833 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2836 EXPORT_SYMBOL(ib_send_cm_sidr_rep
);
2838 static void cm_format_sidr_rep_event(struct cm_work
*work
)
2840 struct cm_sidr_rep_msg
*sidr_rep_msg
;
2841 struct ib_cm_sidr_rep_event_param
*param
;
2843 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
2844 work
->mad_recv_wc
->recv_buf
.mad
;
2845 param
= &work
->cm_event
.param
.sidr_rep_rcvd
;
2846 param
->status
= sidr_rep_msg
->status
;
2847 param
->qkey
= be32_to_cpu(sidr_rep_msg
->qkey
);
2848 param
->qpn
= be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg
));
2849 param
->info
= &sidr_rep_msg
->info
;
2850 param
->info_len
= sidr_rep_msg
->info_length
;
2851 work
->cm_event
.private_data
= &sidr_rep_msg
->private_data
;
2854 static int cm_sidr_rep_handler(struct cm_work
*work
)
2856 struct cm_sidr_rep_msg
*sidr_rep_msg
;
2857 struct cm_id_private
*cm_id_priv
;
2858 unsigned long flags
;
2860 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
2861 work
->mad_recv_wc
->recv_buf
.mad
;
2862 cm_id_priv
= cm_acquire_id(sidr_rep_msg
->request_id
, 0);
2864 return -EINVAL
; /* Unmatched reply. */
2866 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2867 if (cm_id_priv
->id
.state
!= IB_CM_SIDR_REQ_SENT
) {
2868 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2871 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2872 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2873 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2875 cm_format_sidr_rep_event(work
);
2876 cm_process_work(cm_id_priv
, work
);
2879 cm_deref_id(cm_id_priv
);
2883 static void cm_process_send_error(struct ib_mad_send_buf
*msg
,
2884 enum ib_wc_status wc_status
)
2886 struct cm_id_private
*cm_id_priv
;
2887 struct ib_cm_event cm_event
;
2888 enum ib_cm_state state
;
2889 unsigned long flags
;
2892 memset(&cm_event
, 0, sizeof cm_event
);
2893 cm_id_priv
= msg
->context
[0];
2895 /* Discard old sends or ones without a response. */
2896 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2897 state
= (enum ib_cm_state
) (unsigned long) msg
->context
[1];
2898 if (msg
!= cm_id_priv
->msg
|| state
!= cm_id_priv
->id
.state
)
2902 case IB_CM_REQ_SENT
:
2903 case IB_CM_MRA_REQ_RCVD
:
2904 cm_reset_to_idle(cm_id_priv
);
2905 cm_event
.event
= IB_CM_REQ_ERROR
;
2907 case IB_CM_REP_SENT
:
2908 case IB_CM_MRA_REP_RCVD
:
2909 cm_reset_to_idle(cm_id_priv
);
2910 cm_event
.event
= IB_CM_REP_ERROR
;
2912 case IB_CM_DREQ_SENT
:
2913 cm_enter_timewait(cm_id_priv
);
2914 cm_event
.event
= IB_CM_DREQ_ERROR
;
2916 case IB_CM_SIDR_REQ_SENT
:
2917 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2918 cm_event
.event
= IB_CM_SIDR_REQ_ERROR
;
2923 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2924 cm_event
.param
.send_status
= wc_status
;
2926 /* No other events can occur on the cm_id at this point. */
2927 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &cm_event
);
2930 ib_destroy_cm_id(&cm_id_priv
->id
);
2933 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2937 static void cm_send_handler(struct ib_mad_agent
*mad_agent
,
2938 struct ib_mad_send_wc
*mad_send_wc
)
2940 struct ib_mad_send_buf
*msg
= mad_send_wc
->send_buf
;
2942 switch (mad_send_wc
->status
) {
2944 case IB_WC_WR_FLUSH_ERR
:
2948 if (msg
->context
[0] && msg
->context
[1])
2949 cm_process_send_error(msg
, mad_send_wc
->status
);
2956 static void cm_work_handler(void *data
)
2958 struct cm_work
*work
= data
;
2961 switch (work
->cm_event
.event
) {
2962 case IB_CM_REQ_RECEIVED
:
2963 ret
= cm_req_handler(work
);
2965 case IB_CM_MRA_RECEIVED
:
2966 ret
= cm_mra_handler(work
);
2968 case IB_CM_REJ_RECEIVED
:
2969 ret
= cm_rej_handler(work
);
2971 case IB_CM_REP_RECEIVED
:
2972 ret
= cm_rep_handler(work
);
2974 case IB_CM_RTU_RECEIVED
:
2975 ret
= cm_rtu_handler(work
);
2977 case IB_CM_USER_ESTABLISHED
:
2978 ret
= cm_establish_handler(work
);
2980 case IB_CM_DREQ_RECEIVED
:
2981 ret
= cm_dreq_handler(work
);
2983 case IB_CM_DREP_RECEIVED
:
2984 ret
= cm_drep_handler(work
);
2986 case IB_CM_SIDR_REQ_RECEIVED
:
2987 ret
= cm_sidr_req_handler(work
);
2989 case IB_CM_SIDR_REP_RECEIVED
:
2990 ret
= cm_sidr_rep_handler(work
);
2992 case IB_CM_LAP_RECEIVED
:
2993 ret
= cm_lap_handler(work
);
2995 case IB_CM_APR_RECEIVED
:
2996 ret
= cm_apr_handler(work
);
2998 case IB_CM_TIMEWAIT_EXIT
:
2999 ret
= cm_timewait_handler(work
);
3009 int ib_cm_establish(struct ib_cm_id
*cm_id
)
3011 struct cm_id_private
*cm_id_priv
;
3012 struct cm_work
*work
;
3013 unsigned long flags
;
3016 work
= kmalloc(sizeof *work
, GFP_ATOMIC
);
3020 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3021 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3022 switch (cm_id
->state
)
3024 case IB_CM_REP_SENT
:
3025 case IB_CM_MRA_REP_RCVD
:
3026 cm_id
->state
= IB_CM_ESTABLISHED
;
3028 case IB_CM_ESTABLISHED
:
3035 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3043 * The CM worker thread may try to destroy the cm_id before it
3044 * can execute this work item. To prevent potential deadlock,
3045 * we need to find the cm_id once we're in the context of the
3046 * worker thread, rather than holding a reference on it.
3048 INIT_WORK(&work
->work
, cm_work_handler
, work
);
3049 work
->local_id
= cm_id
->local_id
;
3050 work
->remote_id
= cm_id
->remote_id
;
3051 work
->mad_recv_wc
= NULL
;
3052 work
->cm_event
.event
= IB_CM_USER_ESTABLISHED
;
3053 queue_work(cm
.wq
, &work
->work
);
3057 EXPORT_SYMBOL(ib_cm_establish
);
3059 static void cm_recv_handler(struct ib_mad_agent
*mad_agent
,
3060 struct ib_mad_recv_wc
*mad_recv_wc
)
3062 struct cm_work
*work
;
3063 enum ib_cm_event_type event
;
3066 switch (mad_recv_wc
->recv_buf
.mad
->mad_hdr
.attr_id
) {
3067 case CM_REQ_ATTR_ID
:
3068 paths
= 1 + (((struct cm_req_msg
*) mad_recv_wc
->recv_buf
.mad
)->
3069 alt_local_lid
!= 0);
3070 event
= IB_CM_REQ_RECEIVED
;
3072 case CM_MRA_ATTR_ID
:
3073 event
= IB_CM_MRA_RECEIVED
;
3075 case CM_REJ_ATTR_ID
:
3076 event
= IB_CM_REJ_RECEIVED
;
3078 case CM_REP_ATTR_ID
:
3079 event
= IB_CM_REP_RECEIVED
;
3081 case CM_RTU_ATTR_ID
:
3082 event
= IB_CM_RTU_RECEIVED
;
3084 case CM_DREQ_ATTR_ID
:
3085 event
= IB_CM_DREQ_RECEIVED
;
3087 case CM_DREP_ATTR_ID
:
3088 event
= IB_CM_DREP_RECEIVED
;
3090 case CM_SIDR_REQ_ATTR_ID
:
3091 event
= IB_CM_SIDR_REQ_RECEIVED
;
3093 case CM_SIDR_REP_ATTR_ID
:
3094 event
= IB_CM_SIDR_REP_RECEIVED
;
3096 case CM_LAP_ATTR_ID
:
3098 event
= IB_CM_LAP_RECEIVED
;
3100 case CM_APR_ATTR_ID
:
3101 event
= IB_CM_APR_RECEIVED
;
3104 ib_free_recv_mad(mad_recv_wc
);
3108 work
= kmalloc(sizeof *work
+ sizeof(struct ib_sa_path_rec
) * paths
,
3111 ib_free_recv_mad(mad_recv_wc
);
3115 INIT_WORK(&work
->work
, cm_work_handler
, work
);
3116 work
->cm_event
.event
= event
;
3117 work
->mad_recv_wc
= mad_recv_wc
;
3118 work
->port
= (struct cm_port
*)mad_agent
->context
;
3119 queue_work(cm
.wq
, &work
->work
);
3122 static int cm_init_qp_init_attr(struct cm_id_private
*cm_id_priv
,
3123 struct ib_qp_attr
*qp_attr
,
3126 unsigned long flags
;
3129 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3130 switch (cm_id_priv
->id
.state
) {
3131 case IB_CM_REQ_SENT
:
3132 case IB_CM_MRA_REQ_RCVD
:
3133 case IB_CM_REQ_RCVD
:
3134 case IB_CM_MRA_REQ_SENT
:
3135 case IB_CM_REP_RCVD
:
3136 case IB_CM_MRA_REP_SENT
:
3137 case IB_CM_REP_SENT
:
3138 case IB_CM_MRA_REP_RCVD
:
3139 case IB_CM_ESTABLISHED
:
3140 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
|
3141 IB_QP_PKEY_INDEX
| IB_QP_PORT
;
3142 qp_attr
->qp_access_flags
= IB_ACCESS_LOCAL_WRITE
|
3143 IB_ACCESS_REMOTE_WRITE
;
3144 if (cm_id_priv
->responder_resources
)
3145 qp_attr
->qp_access_flags
|= IB_ACCESS_REMOTE_READ
|
3146 IB_ACCESS_REMOTE_ATOMIC
;
3147 qp_attr
->pkey_index
= cm_id_priv
->av
.pkey_index
;
3148 qp_attr
->port_num
= cm_id_priv
->av
.port
->port_num
;
3155 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3159 static int cm_init_qp_rtr_attr(struct cm_id_private
*cm_id_priv
,
3160 struct ib_qp_attr
*qp_attr
,
3163 unsigned long flags
;
3166 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3167 switch (cm_id_priv
->id
.state
) {
3168 case IB_CM_REQ_RCVD
:
3169 case IB_CM_MRA_REQ_SENT
:
3170 case IB_CM_REP_RCVD
:
3171 case IB_CM_MRA_REP_SENT
:
3172 case IB_CM_REP_SENT
:
3173 case IB_CM_MRA_REP_RCVD
:
3174 case IB_CM_ESTABLISHED
:
3175 *qp_attr_mask
= IB_QP_STATE
| IB_QP_AV
| IB_QP_PATH_MTU
|
3176 IB_QP_DEST_QPN
| IB_QP_RQ_PSN
;
3177 qp_attr
->ah_attr
= cm_id_priv
->av
.ah_attr
;
3178 qp_attr
->path_mtu
= cm_id_priv
->path_mtu
;
3179 qp_attr
->dest_qp_num
= be32_to_cpu(cm_id_priv
->remote_qpn
);
3180 qp_attr
->rq_psn
= be32_to_cpu(cm_id_priv
->rq_psn
);
3181 if (cm_id_priv
->qp_type
== IB_QPT_RC
) {
3182 *qp_attr_mask
|= IB_QP_MAX_DEST_RD_ATOMIC
|
3183 IB_QP_MIN_RNR_TIMER
;
3184 qp_attr
->max_dest_rd_atomic
=
3185 cm_id_priv
->responder_resources
;
3186 qp_attr
->min_rnr_timer
= 0;
3188 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3189 *qp_attr_mask
|= IB_QP_ALT_PATH
;
3190 qp_attr
->alt_port_num
= cm_id_priv
->alt_av
.port
->port_num
;
3191 qp_attr
->alt_ah_attr
= cm_id_priv
->alt_av
.ah_attr
;
3199 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3203 static int cm_init_qp_rts_attr(struct cm_id_private
*cm_id_priv
,
3204 struct ib_qp_attr
*qp_attr
,
3207 unsigned long flags
;
3210 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3211 switch (cm_id_priv
->id
.state
) {
3212 case IB_CM_REP_RCVD
:
3213 case IB_CM_MRA_REP_SENT
:
3214 case IB_CM_REP_SENT
:
3215 case IB_CM_MRA_REP_RCVD
:
3216 case IB_CM_ESTABLISHED
:
3217 *qp_attr_mask
= IB_QP_STATE
| IB_QP_SQ_PSN
;
3218 qp_attr
->sq_psn
= be32_to_cpu(cm_id_priv
->sq_psn
);
3219 if (cm_id_priv
->qp_type
== IB_QPT_RC
) {
3220 *qp_attr_mask
|= IB_QP_TIMEOUT
| IB_QP_RETRY_CNT
|
3222 IB_QP_MAX_QP_RD_ATOMIC
;
3223 qp_attr
->timeout
= cm_id_priv
->local_ack_timeout
;
3224 qp_attr
->retry_cnt
= cm_id_priv
->retry_count
;
3225 qp_attr
->rnr_retry
= cm_id_priv
->rnr_retry_count
;
3226 qp_attr
->max_rd_atomic
= cm_id_priv
->initiator_depth
;
3228 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3229 *qp_attr_mask
|= IB_QP_PATH_MIG_STATE
;
3230 qp_attr
->path_mig_state
= IB_MIG_REARM
;
3238 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3242 int ib_cm_init_qp_attr(struct ib_cm_id
*cm_id
,
3243 struct ib_qp_attr
*qp_attr
,
3246 struct cm_id_private
*cm_id_priv
;
3249 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3250 switch (qp_attr
->qp_state
) {
3252 ret
= cm_init_qp_init_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3255 ret
= cm_init_qp_rtr_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3258 ret
= cm_init_qp_rts_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3266 EXPORT_SYMBOL(ib_cm_init_qp_attr
);
3268 static void cm_add_one(struct ib_device
*device
)
3270 struct cm_device
*cm_dev
;
3271 struct cm_port
*port
;
3272 struct ib_mad_reg_req reg_req
= {
3273 .mgmt_class
= IB_MGMT_CLASS_CM
,
3274 .mgmt_class_version
= IB_CM_CLASS_VERSION
3276 struct ib_port_modify port_modify
= {
3277 .set_port_cap_mask
= IB_PORT_CM_SUP
3279 unsigned long flags
;
3283 cm_dev
= kmalloc(sizeof(*cm_dev
) + sizeof(*port
) *
3284 device
->phys_port_cnt
, GFP_KERNEL
);
3288 cm_dev
->device
= device
;
3289 cm_dev
->ca_guid
= device
->node_guid
;
3291 set_bit(IB_MGMT_METHOD_SEND
, reg_req
.method_mask
);
3292 for (i
= 1; i
<= device
->phys_port_cnt
; i
++) {
3293 port
= &cm_dev
->port
[i
-1];
3294 port
->cm_dev
= cm_dev
;
3296 port
->mad_agent
= ib_register_mad_agent(device
, i
,
3303 if (IS_ERR(port
->mad_agent
))
3306 ret
= ib_modify_port(device
, i
, 0, &port_modify
);
3310 ib_set_client_data(device
, &cm_client
, cm_dev
);
3312 write_lock_irqsave(&cm
.device_lock
, flags
);
3313 list_add_tail(&cm_dev
->list
, &cm
.device_list
);
3314 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3318 ib_unregister_mad_agent(port
->mad_agent
);
3320 port_modify
.set_port_cap_mask
= 0;
3321 port_modify
.clr_port_cap_mask
= IB_PORT_CM_SUP
;
3323 port
= &cm_dev
->port
[i
-1];
3324 ib_modify_port(device
, port
->port_num
, 0, &port_modify
);
3325 ib_unregister_mad_agent(port
->mad_agent
);
3330 static void cm_remove_one(struct ib_device
*device
)
3332 struct cm_device
*cm_dev
;
3333 struct cm_port
*port
;
3334 struct ib_port_modify port_modify
= {
3335 .clr_port_cap_mask
= IB_PORT_CM_SUP
3337 unsigned long flags
;
3340 cm_dev
= ib_get_client_data(device
, &cm_client
);
3344 write_lock_irqsave(&cm
.device_lock
, flags
);
3345 list_del(&cm_dev
->list
);
3346 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3348 for (i
= 1; i
<= device
->phys_port_cnt
; i
++) {
3349 port
= &cm_dev
->port
[i
-1];
3350 ib_modify_port(device
, port
->port_num
, 0, &port_modify
);
3351 ib_unregister_mad_agent(port
->mad_agent
);
3356 static int __init
ib_cm_init(void)
3360 memset(&cm
, 0, sizeof cm
);
3361 INIT_LIST_HEAD(&cm
.device_list
);
3362 rwlock_init(&cm
.device_lock
);
3363 spin_lock_init(&cm
.lock
);
3364 cm
.listen_service_table
= RB_ROOT
;
3365 cm
.listen_service_id
= __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID
);
3366 cm
.remote_id_table
= RB_ROOT
;
3367 cm
.remote_qp_table
= RB_ROOT
;
3368 cm
.remote_sidr_table
= RB_ROOT
;
3369 idr_init(&cm
.local_id_table
);
3370 get_random_bytes(&cm
.random_id_operand
, sizeof cm
.random_id_operand
);
3371 idr_pre_get(&cm
.local_id_table
, GFP_KERNEL
);
3373 cm
.wq
= create_workqueue("ib_cm");
3377 ret
= ib_register_client(&cm_client
);
3383 destroy_workqueue(cm
.wq
);
3387 static void __exit
ib_cm_cleanup(void)
3389 destroy_workqueue(cm
.wq
);
3390 ib_unregister_client(&cm_client
);
3391 idr_destroy(&cm
.local_id_table
);
3394 module_init(ib_cm_init
);
3395 module_exit(ib_cm_cleanup
);