2 * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 * $Id: cm.c 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/rbtree.h>
45 #include <linux/spinlock.h>
46 #include <linux/workqueue.h>
48 #include <rdma/ib_cache.h>
49 #include <rdma/ib_cm.h>
52 MODULE_AUTHOR("Sean Hefty");
53 MODULE_DESCRIPTION("InfiniBand CM");
54 MODULE_LICENSE("Dual BSD/GPL");
56 static void cm_add_one(struct ib_device
*device
);
57 static void cm_remove_one(struct ib_device
*device
);
59 static struct ib_client cm_client
= {
62 .remove
= cm_remove_one
67 struct list_head device_list
;
69 struct rb_root listen_service_table
;
70 u64 listen_service_id
;
71 /* struct rb_root peer_service_table; todo: fix peer to peer */
72 struct rb_root remote_qp_table
;
73 struct rb_root remote_id_table
;
74 struct rb_root remote_sidr_table
;
75 struct idr local_id_table
;
76 struct workqueue_struct
*wq
;
80 struct cm_device
*cm_dev
;
81 struct ib_mad_agent
*mad_agent
;
86 struct list_head list
;
87 struct ib_device
*device
;
89 struct cm_port port
[0];
95 struct ib_ah_attr ah_attr
;
101 struct work_struct work
;
102 struct list_head list
;
103 struct cm_port
*port
;
104 struct ib_mad_recv_wc
*mad_recv_wc
; /* Received MADs */
105 __be32 local_id
; /* Established / timewait */
107 struct ib_cm_event cm_event
;
108 struct ib_sa_path_rec path
[0];
111 struct cm_timewait_info
{
112 struct cm_work work
; /* Must be first. */
113 struct rb_node remote_qp_node
;
114 struct rb_node remote_id_node
;
115 __be64 remote_ca_guid
;
117 u8 inserted_remote_qp
;
118 u8 inserted_remote_id
;
121 struct cm_id_private
{
124 struct rb_node service_node
;
125 struct rb_node sidr_id_node
;
126 spinlock_t lock
; /* Do not acquire inside cm.lock */
127 struct completion comp
;
130 struct ib_mad_send_buf
*msg
;
131 struct cm_timewait_info
*timewait_info
;
132 /* todo: use alternate port on send failure */
135 struct ib_cm_compare_data
*compare_data
;
141 enum ib_qp_type qp_type
;
145 enum ib_mtu path_mtu
;
149 u8 responder_resources
;
151 u8 local_ack_timeout
;
156 struct list_head work_list
;
160 static void cm_work_handler(void *data
);
162 static inline void cm_deref_id(struct cm_id_private
*cm_id_priv
)
164 if (atomic_dec_and_test(&cm_id_priv
->refcount
))
165 complete(&cm_id_priv
->comp
);
168 static int cm_alloc_msg(struct cm_id_private
*cm_id_priv
,
169 struct ib_mad_send_buf
**msg
)
171 struct ib_mad_agent
*mad_agent
;
172 struct ib_mad_send_buf
*m
;
175 mad_agent
= cm_id_priv
->av
.port
->mad_agent
;
176 ah
= ib_create_ah(mad_agent
->qp
->pd
, &cm_id_priv
->av
.ah_attr
);
180 m
= ib_create_send_mad(mad_agent
, cm_id_priv
->id
.remote_cm_qpn
,
181 cm_id_priv
->av
.pkey_index
,
182 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
189 /* Timeout set by caller if response is expected. */
191 m
->retries
= cm_id_priv
->max_cm_retries
;
193 atomic_inc(&cm_id_priv
->refcount
);
194 m
->context
[0] = cm_id_priv
;
199 static int cm_alloc_response_msg(struct cm_port
*port
,
200 struct ib_mad_recv_wc
*mad_recv_wc
,
201 struct ib_mad_send_buf
**msg
)
203 struct ib_mad_send_buf
*m
;
206 ah
= ib_create_ah_from_wc(port
->mad_agent
->qp
->pd
, mad_recv_wc
->wc
,
207 mad_recv_wc
->recv_buf
.grh
, port
->port_num
);
211 m
= ib_create_send_mad(port
->mad_agent
, 1, mad_recv_wc
->wc
->pkey_index
,
212 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
223 static void cm_free_msg(struct ib_mad_send_buf
*msg
)
225 ib_destroy_ah(msg
->ah
);
227 cm_deref_id(msg
->context
[0]);
228 ib_free_send_mad(msg
);
231 static void * cm_copy_private_data(const void *private_data
,
236 if (!private_data
|| !private_data_len
)
239 data
= kmalloc(private_data_len
, GFP_KERNEL
);
241 return ERR_PTR(-ENOMEM
);
243 memcpy(data
, private_data
, private_data_len
);
247 static void cm_set_private_data(struct cm_id_private
*cm_id_priv
,
248 void *private_data
, u8 private_data_len
)
250 if (cm_id_priv
->private_data
&& cm_id_priv
->private_data_len
)
251 kfree(cm_id_priv
->private_data
);
253 cm_id_priv
->private_data
= private_data
;
254 cm_id_priv
->private_data_len
= private_data_len
;
257 static void cm_init_av_for_response(struct cm_port
*port
, struct ib_wc
*wc
,
258 struct ib_grh
*grh
, struct cm_av
*av
)
261 av
->pkey_index
= wc
->pkey_index
;
262 ib_init_ah_from_wc(port
->cm_dev
->device
, port
->port_num
, wc
,
266 static int cm_init_av_by_path(struct ib_sa_path_rec
*path
, struct cm_av
*av
)
268 struct cm_device
*cm_dev
;
269 struct cm_port
*port
= NULL
;
274 read_lock_irqsave(&cm
.device_lock
, flags
);
275 list_for_each_entry(cm_dev
, &cm
.device_list
, list
) {
276 if (!ib_find_cached_gid(cm_dev
->device
, &path
->sgid
,
278 port
= &cm_dev
->port
[p
-1];
282 read_unlock_irqrestore(&cm
.device_lock
, flags
);
287 ret
= ib_find_cached_pkey(cm_dev
->device
, port
->port_num
,
288 be16_to_cpu(path
->pkey
), &av
->pkey_index
);
293 ib_init_ah_from_path(cm_dev
->device
, port
->port_num
, path
,
295 av
->packet_life_time
= path
->packet_life_time
;
299 static int cm_alloc_id(struct cm_id_private
*cm_id_priv
)
306 spin_lock_irqsave(&cm
.lock
, flags
);
307 ret
= idr_get_new_above(&cm
.local_id_table
, cm_id_priv
, next_id
++,
308 (__force
int *) &cm_id_priv
->id
.local_id
);
309 spin_unlock_irqrestore(&cm
.lock
, flags
);
310 } while( (ret
== -EAGAIN
) && idr_pre_get(&cm
.local_id_table
, GFP_KERNEL
) );
314 static void cm_free_id(__be32 local_id
)
318 spin_lock_irqsave(&cm
.lock
, flags
);
319 idr_remove(&cm
.local_id_table
, (__force
int) local_id
);
320 spin_unlock_irqrestore(&cm
.lock
, flags
);
323 static struct cm_id_private
* cm_get_id(__be32 local_id
, __be32 remote_id
)
325 struct cm_id_private
*cm_id_priv
;
327 cm_id_priv
= idr_find(&cm
.local_id_table
, (__force
int) local_id
);
329 if (cm_id_priv
->id
.remote_id
== remote_id
)
330 atomic_inc(&cm_id_priv
->refcount
);
338 static struct cm_id_private
* cm_acquire_id(__be32 local_id
, __be32 remote_id
)
340 struct cm_id_private
*cm_id_priv
;
343 spin_lock_irqsave(&cm
.lock
, flags
);
344 cm_id_priv
= cm_get_id(local_id
, remote_id
);
345 spin_unlock_irqrestore(&cm
.lock
, flags
);
350 static void cm_mask_copy(u8
*dst
, u8
*src
, u8
*mask
)
354 for (i
= 0; i
< IB_CM_COMPARE_SIZE
/ sizeof(unsigned long); i
++)
355 ((unsigned long *) dst
)[i
] = ((unsigned long *) src
)[i
] &
356 ((unsigned long *) mask
)[i
];
359 static int cm_compare_data(struct ib_cm_compare_data
*src_data
,
360 struct ib_cm_compare_data
*dst_data
)
362 u8 src
[IB_CM_COMPARE_SIZE
];
363 u8 dst
[IB_CM_COMPARE_SIZE
];
365 if (!src_data
|| !dst_data
)
368 cm_mask_copy(src
, src_data
->data
, dst_data
->mask
);
369 cm_mask_copy(dst
, dst_data
->data
, src_data
->mask
);
370 return memcmp(src
, dst
, IB_CM_COMPARE_SIZE
);
373 static int cm_compare_private_data(u8
*private_data
,
374 struct ib_cm_compare_data
*dst_data
)
376 u8 src
[IB_CM_COMPARE_SIZE
];
381 cm_mask_copy(src
, private_data
, dst_data
->mask
);
382 return memcmp(src
, dst_data
->data
, IB_CM_COMPARE_SIZE
);
385 static struct cm_id_private
* cm_insert_listen(struct cm_id_private
*cm_id_priv
)
387 struct rb_node
**link
= &cm
.listen_service_table
.rb_node
;
388 struct rb_node
*parent
= NULL
;
389 struct cm_id_private
*cur_cm_id_priv
;
390 __be64 service_id
= cm_id_priv
->id
.service_id
;
391 __be64 service_mask
= cm_id_priv
->id
.service_mask
;
396 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
398 data_cmp
= cm_compare_data(cm_id_priv
->compare_data
,
399 cur_cm_id_priv
->compare_data
);
400 if ((cur_cm_id_priv
->id
.service_mask
& service_id
) ==
401 (service_mask
& cur_cm_id_priv
->id
.service_id
) &&
402 (cm_id_priv
->id
.device
== cur_cm_id_priv
->id
.device
) &&
404 return cur_cm_id_priv
;
406 if (cm_id_priv
->id
.device
< cur_cm_id_priv
->id
.device
)
407 link
= &(*link
)->rb_left
;
408 else if (cm_id_priv
->id
.device
> cur_cm_id_priv
->id
.device
)
409 link
= &(*link
)->rb_right
;
410 else if (service_id
< cur_cm_id_priv
->id
.service_id
)
411 link
= &(*link
)->rb_left
;
412 else if (service_id
> cur_cm_id_priv
->id
.service_id
)
413 link
= &(*link
)->rb_right
;
414 else if (data_cmp
< 0)
415 link
= &(*link
)->rb_left
;
417 link
= &(*link
)->rb_right
;
419 rb_link_node(&cm_id_priv
->service_node
, parent
, link
);
420 rb_insert_color(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
424 static struct cm_id_private
* cm_find_listen(struct ib_device
*device
,
428 struct rb_node
*node
= cm
.listen_service_table
.rb_node
;
429 struct cm_id_private
*cm_id_priv
;
433 cm_id_priv
= rb_entry(node
, struct cm_id_private
, service_node
);
434 data_cmp
= cm_compare_private_data(private_data
,
435 cm_id_priv
->compare_data
);
436 if ((cm_id_priv
->id
.service_mask
& service_id
) ==
437 cm_id_priv
->id
.service_id
&&
438 (cm_id_priv
->id
.device
== device
) && !data_cmp
)
441 if (device
< cm_id_priv
->id
.device
)
442 node
= node
->rb_left
;
443 else if (device
> cm_id_priv
->id
.device
)
444 node
= node
->rb_right
;
445 else if (service_id
< cm_id_priv
->id
.service_id
)
446 node
= node
->rb_left
;
447 else if (service_id
> cm_id_priv
->id
.service_id
)
448 node
= node
->rb_right
;
449 else if (data_cmp
< 0)
450 node
= node
->rb_left
;
452 node
= node
->rb_right
;
457 static struct cm_timewait_info
* cm_insert_remote_id(struct cm_timewait_info
460 struct rb_node
**link
= &cm
.remote_id_table
.rb_node
;
461 struct rb_node
*parent
= NULL
;
462 struct cm_timewait_info
*cur_timewait_info
;
463 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
464 __be32 remote_id
= timewait_info
->work
.remote_id
;
468 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
470 if (remote_id
< cur_timewait_info
->work
.remote_id
)
471 link
= &(*link
)->rb_left
;
472 else if (remote_id
> cur_timewait_info
->work
.remote_id
)
473 link
= &(*link
)->rb_right
;
474 else if (remote_ca_guid
< cur_timewait_info
->remote_ca_guid
)
475 link
= &(*link
)->rb_left
;
476 else if (remote_ca_guid
> cur_timewait_info
->remote_ca_guid
)
477 link
= &(*link
)->rb_right
;
479 return cur_timewait_info
;
481 timewait_info
->inserted_remote_id
= 1;
482 rb_link_node(&timewait_info
->remote_id_node
, parent
, link
);
483 rb_insert_color(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
487 static struct cm_timewait_info
* cm_find_remote_id(__be64 remote_ca_guid
,
490 struct rb_node
*node
= cm
.remote_id_table
.rb_node
;
491 struct cm_timewait_info
*timewait_info
;
494 timewait_info
= rb_entry(node
, struct cm_timewait_info
,
496 if (remote_id
< timewait_info
->work
.remote_id
)
497 node
= node
->rb_left
;
498 else if (remote_id
> timewait_info
->work
.remote_id
)
499 node
= node
->rb_right
;
500 else if (remote_ca_guid
< timewait_info
->remote_ca_guid
)
501 node
= node
->rb_left
;
502 else if (remote_ca_guid
> timewait_info
->remote_ca_guid
)
503 node
= node
->rb_right
;
505 return timewait_info
;
510 static struct cm_timewait_info
* cm_insert_remote_qpn(struct cm_timewait_info
513 struct rb_node
**link
= &cm
.remote_qp_table
.rb_node
;
514 struct rb_node
*parent
= NULL
;
515 struct cm_timewait_info
*cur_timewait_info
;
516 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
517 __be32 remote_qpn
= timewait_info
->remote_qpn
;
521 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
523 if (remote_qpn
< cur_timewait_info
->remote_qpn
)
524 link
= &(*link
)->rb_left
;
525 else if (remote_qpn
> cur_timewait_info
->remote_qpn
)
526 link
= &(*link
)->rb_right
;
527 else if (remote_ca_guid
< cur_timewait_info
->remote_ca_guid
)
528 link
= &(*link
)->rb_left
;
529 else if (remote_ca_guid
> cur_timewait_info
->remote_ca_guid
)
530 link
= &(*link
)->rb_right
;
532 return cur_timewait_info
;
534 timewait_info
->inserted_remote_qp
= 1;
535 rb_link_node(&timewait_info
->remote_qp_node
, parent
, link
);
536 rb_insert_color(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
540 static struct cm_id_private
* cm_insert_remote_sidr(struct cm_id_private
543 struct rb_node
**link
= &cm
.remote_sidr_table
.rb_node
;
544 struct rb_node
*parent
= NULL
;
545 struct cm_id_private
*cur_cm_id_priv
;
546 union ib_gid
*port_gid
= &cm_id_priv
->av
.dgid
;
547 __be32 remote_id
= cm_id_priv
->id
.remote_id
;
551 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
553 if (remote_id
< cur_cm_id_priv
->id
.remote_id
)
554 link
= &(*link
)->rb_left
;
555 else if (remote_id
> cur_cm_id_priv
->id
.remote_id
)
556 link
= &(*link
)->rb_right
;
559 cmp
= memcmp(port_gid
, &cur_cm_id_priv
->av
.dgid
,
562 link
= &(*link
)->rb_left
;
564 link
= &(*link
)->rb_right
;
566 return cur_cm_id_priv
;
569 rb_link_node(&cm_id_priv
->sidr_id_node
, parent
, link
);
570 rb_insert_color(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
574 static void cm_reject_sidr_req(struct cm_id_private
*cm_id_priv
,
575 enum ib_cm_sidr_status status
)
577 struct ib_cm_sidr_rep_param param
;
579 memset(¶m
, 0, sizeof param
);
580 param
.status
= status
;
581 ib_send_cm_sidr_rep(&cm_id_priv
->id
, ¶m
);
584 struct ib_cm_id
*ib_create_cm_id(struct ib_device
*device
,
585 ib_cm_handler cm_handler
,
588 struct cm_id_private
*cm_id_priv
;
591 cm_id_priv
= kzalloc(sizeof *cm_id_priv
, GFP_KERNEL
);
593 return ERR_PTR(-ENOMEM
);
595 cm_id_priv
->id
.state
= IB_CM_IDLE
;
596 cm_id_priv
->id
.device
= device
;
597 cm_id_priv
->id
.cm_handler
= cm_handler
;
598 cm_id_priv
->id
.context
= context
;
599 cm_id_priv
->id
.remote_cm_qpn
= 1;
600 ret
= cm_alloc_id(cm_id_priv
);
604 spin_lock_init(&cm_id_priv
->lock
);
605 init_completion(&cm_id_priv
->comp
);
606 INIT_LIST_HEAD(&cm_id_priv
->work_list
);
607 atomic_set(&cm_id_priv
->work_count
, -1);
608 atomic_set(&cm_id_priv
->refcount
, 1);
609 return &cm_id_priv
->id
;
613 return ERR_PTR(-ENOMEM
);
615 EXPORT_SYMBOL(ib_create_cm_id
);
617 static struct cm_work
* cm_dequeue_work(struct cm_id_private
*cm_id_priv
)
619 struct cm_work
*work
;
621 if (list_empty(&cm_id_priv
->work_list
))
624 work
= list_entry(cm_id_priv
->work_list
.next
, struct cm_work
, list
);
625 list_del(&work
->list
);
629 static void cm_free_work(struct cm_work
*work
)
631 if (work
->mad_recv_wc
)
632 ib_free_recv_mad(work
->mad_recv_wc
);
636 static inline int cm_convert_to_ms(int iba_time
)
638 /* approximate conversion to ms from 4.096us x 2^iba_time */
639 return 1 << max(iba_time
- 8, 0);
642 static void cm_cleanup_timewait(struct cm_timewait_info
*timewait_info
)
646 if (!timewait_info
->inserted_remote_id
&&
647 !timewait_info
->inserted_remote_qp
)
650 spin_lock_irqsave(&cm
.lock
, flags
);
651 if (timewait_info
->inserted_remote_id
) {
652 rb_erase(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
653 timewait_info
->inserted_remote_id
= 0;
656 if (timewait_info
->inserted_remote_qp
) {
657 rb_erase(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
658 timewait_info
->inserted_remote_qp
= 0;
660 spin_unlock_irqrestore(&cm
.lock
, flags
);
663 static struct cm_timewait_info
* cm_create_timewait_info(__be32 local_id
)
665 struct cm_timewait_info
*timewait_info
;
667 timewait_info
= kzalloc(sizeof *timewait_info
, GFP_KERNEL
);
669 return ERR_PTR(-ENOMEM
);
671 timewait_info
->work
.local_id
= local_id
;
672 INIT_WORK(&timewait_info
->work
.work
, cm_work_handler
,
673 &timewait_info
->work
);
674 timewait_info
->work
.cm_event
.event
= IB_CM_TIMEWAIT_EXIT
;
675 return timewait_info
;
678 static void cm_enter_timewait(struct cm_id_private
*cm_id_priv
)
683 * The cm_id could be destroyed by the user before we exit timewait.
684 * To protect against this, we search for the cm_id after exiting
685 * timewait before notifying the user that we've exited timewait.
687 cm_id_priv
->id
.state
= IB_CM_TIMEWAIT
;
688 wait_time
= cm_convert_to_ms(cm_id_priv
->local_ack_timeout
);
689 queue_delayed_work(cm
.wq
, &cm_id_priv
->timewait_info
->work
.work
,
690 msecs_to_jiffies(wait_time
));
691 cm_id_priv
->timewait_info
= NULL
;
694 static void cm_reset_to_idle(struct cm_id_private
*cm_id_priv
)
696 cm_id_priv
->id
.state
= IB_CM_IDLE
;
697 if (cm_id_priv
->timewait_info
) {
698 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
699 kfree(cm_id_priv
->timewait_info
);
700 cm_id_priv
->timewait_info
= NULL
;
704 static void cm_destroy_id(struct ib_cm_id
*cm_id
, int err
)
706 struct cm_id_private
*cm_id_priv
;
707 struct cm_work
*work
;
710 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
712 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
713 switch (cm_id
->state
) {
715 cm_id
->state
= IB_CM_IDLE
;
716 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
717 spin_lock_irqsave(&cm
.lock
, flags
);
718 rb_erase(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
719 spin_unlock_irqrestore(&cm
.lock
, flags
);
721 case IB_CM_SIDR_REQ_SENT
:
722 cm_id
->state
= IB_CM_IDLE
;
723 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
724 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
726 case IB_CM_SIDR_REQ_RCVD
:
727 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
728 cm_reject_sidr_req(cm_id_priv
, IB_SIDR_REJECT
);
731 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
732 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
733 ib_send_cm_rej(cm_id
, IB_CM_REJ_TIMEOUT
,
734 &cm_id_priv
->av
.port
->cm_dev
->ca_guid
,
735 sizeof cm_id_priv
->av
.port
->cm_dev
->ca_guid
,
739 if (err
== -ENOMEM
) {
740 /* Do not reject to allow future retries. */
741 cm_reset_to_idle(cm_id_priv
);
742 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
744 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
745 ib_send_cm_rej(cm_id
, IB_CM_REJ_CONSUMER_DEFINED
,
749 case IB_CM_MRA_REQ_RCVD
:
751 case IB_CM_MRA_REP_RCVD
:
752 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
754 case IB_CM_MRA_REQ_SENT
:
756 case IB_CM_MRA_REP_SENT
:
757 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
758 ib_send_cm_rej(cm_id
, IB_CM_REJ_CONSUMER_DEFINED
,
761 case IB_CM_ESTABLISHED
:
762 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
763 ib_send_cm_dreq(cm_id
, NULL
, 0);
765 case IB_CM_DREQ_SENT
:
766 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
767 cm_enter_timewait(cm_id_priv
);
768 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
770 case IB_CM_DREQ_RCVD
:
771 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
772 ib_send_cm_drep(cm_id
, NULL
, 0);
775 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
779 cm_free_id(cm_id
->local_id
);
780 cm_deref_id(cm_id_priv
);
781 wait_for_completion(&cm_id_priv
->comp
);
782 while ((work
= cm_dequeue_work(cm_id_priv
)) != NULL
)
784 kfree(cm_id_priv
->compare_data
);
785 kfree(cm_id_priv
->private_data
);
789 void ib_destroy_cm_id(struct ib_cm_id
*cm_id
)
791 cm_destroy_id(cm_id
, 0);
793 EXPORT_SYMBOL(ib_destroy_cm_id
);
795 int ib_cm_listen(struct ib_cm_id
*cm_id
, __be64 service_id
, __be64 service_mask
,
796 struct ib_cm_compare_data
*compare_data
)
798 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
802 service_mask
= service_mask
? service_mask
:
803 __constant_cpu_to_be64(~0ULL);
804 service_id
&= service_mask
;
805 if ((service_id
& IB_SERVICE_ID_AGN_MASK
) == IB_CM_ASSIGN_SERVICE_ID
&&
806 (service_id
!= IB_CM_ASSIGN_SERVICE_ID
))
809 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
810 if (cm_id
->state
!= IB_CM_IDLE
)
814 cm_id_priv
->compare_data
= kzalloc(sizeof *compare_data
,
816 if (!cm_id_priv
->compare_data
)
818 cm_mask_copy(cm_id_priv
->compare_data
->data
,
819 compare_data
->data
, compare_data
->mask
);
820 memcpy(cm_id_priv
->compare_data
->mask
, compare_data
->mask
,
824 cm_id
->state
= IB_CM_LISTEN
;
826 spin_lock_irqsave(&cm
.lock
, flags
);
827 if (service_id
== IB_CM_ASSIGN_SERVICE_ID
) {
828 cm_id
->service_id
= cpu_to_be64(cm
.listen_service_id
++);
829 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
831 cm_id
->service_id
= service_id
;
832 cm_id
->service_mask
= service_mask
;
834 cur_cm_id_priv
= cm_insert_listen(cm_id_priv
);
835 spin_unlock_irqrestore(&cm
.lock
, flags
);
837 if (cur_cm_id_priv
) {
838 cm_id
->state
= IB_CM_IDLE
;
839 kfree(cm_id_priv
->compare_data
);
840 cm_id_priv
->compare_data
= NULL
;
845 EXPORT_SYMBOL(ib_cm_listen
);
847 static __be64
cm_form_tid(struct cm_id_private
*cm_id_priv
,
848 enum cm_msg_sequence msg_seq
)
852 hi_tid
= ((u64
) cm_id_priv
->av
.port
->mad_agent
->hi_tid
) << 32;
853 low_tid
= (u64
) ((__force u32
)cm_id_priv
->id
.local_id
|
855 return cpu_to_be64(hi_tid
| low_tid
);
858 static void cm_format_mad_hdr(struct ib_mad_hdr
*hdr
,
859 __be16 attr_id
, __be64 tid
)
861 hdr
->base_version
= IB_MGMT_BASE_VERSION
;
862 hdr
->mgmt_class
= IB_MGMT_CLASS_CM
;
863 hdr
->class_version
= IB_CM_CLASS_VERSION
;
864 hdr
->method
= IB_MGMT_METHOD_SEND
;
865 hdr
->attr_id
= attr_id
;
869 static void cm_format_req(struct cm_req_msg
*req_msg
,
870 struct cm_id_private
*cm_id_priv
,
871 struct ib_cm_req_param
*param
)
873 cm_format_mad_hdr(&req_msg
->hdr
, CM_REQ_ATTR_ID
,
874 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_REQ
));
876 req_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
877 req_msg
->service_id
= param
->service_id
;
878 req_msg
->local_ca_guid
= cm_id_priv
->av
.port
->cm_dev
->ca_guid
;
879 cm_req_set_local_qpn(req_msg
, cpu_to_be32(param
->qp_num
));
880 cm_req_set_resp_res(req_msg
, param
->responder_resources
);
881 cm_req_set_init_depth(req_msg
, param
->initiator_depth
);
882 cm_req_set_remote_resp_timeout(req_msg
,
883 param
->remote_cm_response_timeout
);
884 cm_req_set_qp_type(req_msg
, param
->qp_type
);
885 cm_req_set_flow_ctrl(req_msg
, param
->flow_control
);
886 cm_req_set_starting_psn(req_msg
, cpu_to_be32(param
->starting_psn
));
887 cm_req_set_local_resp_timeout(req_msg
,
888 param
->local_cm_response_timeout
);
889 cm_req_set_retry_count(req_msg
, param
->retry_count
);
890 req_msg
->pkey
= param
->primary_path
->pkey
;
891 cm_req_set_path_mtu(req_msg
, param
->primary_path
->mtu
);
892 cm_req_set_rnr_retry_count(req_msg
, param
->rnr_retry_count
);
893 cm_req_set_max_cm_retries(req_msg
, param
->max_cm_retries
);
894 cm_req_set_srq(req_msg
, param
->srq
);
896 req_msg
->primary_local_lid
= param
->primary_path
->slid
;
897 req_msg
->primary_remote_lid
= param
->primary_path
->dlid
;
898 req_msg
->primary_local_gid
= param
->primary_path
->sgid
;
899 req_msg
->primary_remote_gid
= param
->primary_path
->dgid
;
900 cm_req_set_primary_flow_label(req_msg
, param
->primary_path
->flow_label
);
901 cm_req_set_primary_packet_rate(req_msg
, param
->primary_path
->rate
);
902 req_msg
->primary_traffic_class
= param
->primary_path
->traffic_class
;
903 req_msg
->primary_hop_limit
= param
->primary_path
->hop_limit
;
904 cm_req_set_primary_sl(req_msg
, param
->primary_path
->sl
);
905 cm_req_set_primary_subnet_local(req_msg
, 1); /* local only... */
906 cm_req_set_primary_local_ack_timeout(req_msg
,
907 min(31, param
->primary_path
->packet_life_time
+ 1));
909 if (param
->alternate_path
) {
910 req_msg
->alt_local_lid
= param
->alternate_path
->slid
;
911 req_msg
->alt_remote_lid
= param
->alternate_path
->dlid
;
912 req_msg
->alt_local_gid
= param
->alternate_path
->sgid
;
913 req_msg
->alt_remote_gid
= param
->alternate_path
->dgid
;
914 cm_req_set_alt_flow_label(req_msg
,
915 param
->alternate_path
->flow_label
);
916 cm_req_set_alt_packet_rate(req_msg
, param
->alternate_path
->rate
);
917 req_msg
->alt_traffic_class
= param
->alternate_path
->traffic_class
;
918 req_msg
->alt_hop_limit
= param
->alternate_path
->hop_limit
;
919 cm_req_set_alt_sl(req_msg
, param
->alternate_path
->sl
);
920 cm_req_set_alt_subnet_local(req_msg
, 1); /* local only... */
921 cm_req_set_alt_local_ack_timeout(req_msg
,
922 min(31, param
->alternate_path
->packet_life_time
+ 1));
925 if (param
->private_data
&& param
->private_data_len
)
926 memcpy(req_msg
->private_data
, param
->private_data
,
927 param
->private_data_len
);
930 static int cm_validate_req_param(struct ib_cm_req_param
*param
)
932 /* peer-to-peer not supported */
933 if (param
->peer_to_peer
)
936 if (!param
->primary_path
)
939 if (param
->qp_type
!= IB_QPT_RC
&& param
->qp_type
!= IB_QPT_UC
)
942 if (param
->private_data
&&
943 param
->private_data_len
> IB_CM_REQ_PRIVATE_DATA_SIZE
)
946 if (param
->alternate_path
&&
947 (param
->alternate_path
->pkey
!= param
->primary_path
->pkey
||
948 param
->alternate_path
->mtu
!= param
->primary_path
->mtu
))
954 int ib_send_cm_req(struct ib_cm_id
*cm_id
,
955 struct ib_cm_req_param
*param
)
957 struct cm_id_private
*cm_id_priv
;
958 struct cm_req_msg
*req_msg
;
962 ret
= cm_validate_req_param(param
);
966 /* Verify that we're not in timewait. */
967 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
968 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
969 if (cm_id
->state
!= IB_CM_IDLE
) {
970 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
974 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
976 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
978 if (IS_ERR(cm_id_priv
->timewait_info
)) {
979 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
983 ret
= cm_init_av_by_path(param
->primary_path
, &cm_id_priv
->av
);
986 if (param
->alternate_path
) {
987 ret
= cm_init_av_by_path(param
->alternate_path
,
988 &cm_id_priv
->alt_av
);
992 cm_id
->service_id
= param
->service_id
;
993 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
994 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
995 param
->primary_path
->packet_life_time
) * 2 +
997 param
->remote_cm_response_timeout
);
998 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
999 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1000 cm_id_priv
->responder_resources
= param
->responder_resources
;
1001 cm_id_priv
->retry_count
= param
->retry_count
;
1002 cm_id_priv
->path_mtu
= param
->primary_path
->mtu
;
1003 cm_id_priv
->qp_type
= param
->qp_type
;
1005 ret
= cm_alloc_msg(cm_id_priv
, &cm_id_priv
->msg
);
1009 req_msg
= (struct cm_req_msg
*) cm_id_priv
->msg
->mad
;
1010 cm_format_req(req_msg
, cm_id_priv
, param
);
1011 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1012 cm_id_priv
->msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1013 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long) IB_CM_REQ_SENT
;
1015 cm_id_priv
->local_qpn
= cm_req_get_local_qpn(req_msg
);
1016 cm_id_priv
->rq_psn
= cm_req_get_starting_psn(req_msg
);
1017 cm_id_priv
->local_ack_timeout
=
1018 cm_req_get_primary_local_ack_timeout(req_msg
);
1020 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1021 ret
= ib_post_send_mad(cm_id_priv
->msg
, NULL
);
1023 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1026 BUG_ON(cm_id
->state
!= IB_CM_IDLE
);
1027 cm_id
->state
= IB_CM_REQ_SENT
;
1028 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1031 error2
: cm_free_msg(cm_id_priv
->msg
);
1032 error1
: kfree(cm_id_priv
->timewait_info
);
1035 EXPORT_SYMBOL(ib_send_cm_req
);
1037 static int cm_issue_rej(struct cm_port
*port
,
1038 struct ib_mad_recv_wc
*mad_recv_wc
,
1039 enum ib_cm_rej_reason reason
,
1040 enum cm_msg_response msg_rejected
,
1041 void *ari
, u8 ari_length
)
1043 struct ib_mad_send_buf
*msg
= NULL
;
1044 struct cm_rej_msg
*rej_msg
, *rcv_msg
;
1047 ret
= cm_alloc_response_msg(port
, mad_recv_wc
, &msg
);
1051 /* We just need common CM header information. Cast to any message. */
1052 rcv_msg
= (struct cm_rej_msg
*) mad_recv_wc
->recv_buf
.mad
;
1053 rej_msg
= (struct cm_rej_msg
*) msg
->mad
;
1055 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, rcv_msg
->hdr
.tid
);
1056 rej_msg
->remote_comm_id
= rcv_msg
->local_comm_id
;
1057 rej_msg
->local_comm_id
= rcv_msg
->remote_comm_id
;
1058 cm_rej_set_msg_rejected(rej_msg
, msg_rejected
);
1059 rej_msg
->reason
= cpu_to_be16(reason
);
1061 if (ari
&& ari_length
) {
1062 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1063 memcpy(rej_msg
->ari
, ari
, ari_length
);
1066 ret
= ib_post_send_mad(msg
, NULL
);
1073 static inline int cm_is_active_peer(__be64 local_ca_guid
, __be64 remote_ca_guid
,
1074 __be32 local_qpn
, __be32 remote_qpn
)
1076 return (be64_to_cpu(local_ca_guid
) > be64_to_cpu(remote_ca_guid
) ||
1077 ((local_ca_guid
== remote_ca_guid
) &&
1078 (be32_to_cpu(local_qpn
) > be32_to_cpu(remote_qpn
))));
1081 static void cm_format_paths_from_req(struct cm_req_msg
*req_msg
,
1082 struct ib_sa_path_rec
*primary_path
,
1083 struct ib_sa_path_rec
*alt_path
)
1085 memset(primary_path
, 0, sizeof *primary_path
);
1086 primary_path
->dgid
= req_msg
->primary_local_gid
;
1087 primary_path
->sgid
= req_msg
->primary_remote_gid
;
1088 primary_path
->dlid
= req_msg
->primary_local_lid
;
1089 primary_path
->slid
= req_msg
->primary_remote_lid
;
1090 primary_path
->flow_label
= cm_req_get_primary_flow_label(req_msg
);
1091 primary_path
->hop_limit
= req_msg
->primary_hop_limit
;
1092 primary_path
->traffic_class
= req_msg
->primary_traffic_class
;
1093 primary_path
->reversible
= 1;
1094 primary_path
->pkey
= req_msg
->pkey
;
1095 primary_path
->sl
= cm_req_get_primary_sl(req_msg
);
1096 primary_path
->mtu_selector
= IB_SA_EQ
;
1097 primary_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1098 primary_path
->rate_selector
= IB_SA_EQ
;
1099 primary_path
->rate
= cm_req_get_primary_packet_rate(req_msg
);
1100 primary_path
->packet_life_time_selector
= IB_SA_EQ
;
1101 primary_path
->packet_life_time
=
1102 cm_req_get_primary_local_ack_timeout(req_msg
);
1103 primary_path
->packet_life_time
-= (primary_path
->packet_life_time
> 0);
1105 if (req_msg
->alt_local_lid
) {
1106 memset(alt_path
, 0, sizeof *alt_path
);
1107 alt_path
->dgid
= req_msg
->alt_local_gid
;
1108 alt_path
->sgid
= req_msg
->alt_remote_gid
;
1109 alt_path
->dlid
= req_msg
->alt_local_lid
;
1110 alt_path
->slid
= req_msg
->alt_remote_lid
;
1111 alt_path
->flow_label
= cm_req_get_alt_flow_label(req_msg
);
1112 alt_path
->hop_limit
= req_msg
->alt_hop_limit
;
1113 alt_path
->traffic_class
= req_msg
->alt_traffic_class
;
1114 alt_path
->reversible
= 1;
1115 alt_path
->pkey
= req_msg
->pkey
;
1116 alt_path
->sl
= cm_req_get_alt_sl(req_msg
);
1117 alt_path
->mtu_selector
= IB_SA_EQ
;
1118 alt_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1119 alt_path
->rate_selector
= IB_SA_EQ
;
1120 alt_path
->rate
= cm_req_get_alt_packet_rate(req_msg
);
1121 alt_path
->packet_life_time_selector
= IB_SA_EQ
;
1122 alt_path
->packet_life_time
=
1123 cm_req_get_alt_local_ack_timeout(req_msg
);
1124 alt_path
->packet_life_time
-= (alt_path
->packet_life_time
> 0);
1128 static void cm_format_req_event(struct cm_work
*work
,
1129 struct cm_id_private
*cm_id_priv
,
1130 struct ib_cm_id
*listen_id
)
1132 struct cm_req_msg
*req_msg
;
1133 struct ib_cm_req_event_param
*param
;
1135 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1136 param
= &work
->cm_event
.param
.req_rcvd
;
1137 param
->listen_id
= listen_id
;
1138 param
->port
= cm_id_priv
->av
.port
->port_num
;
1139 param
->primary_path
= &work
->path
[0];
1140 if (req_msg
->alt_local_lid
)
1141 param
->alternate_path
= &work
->path
[1];
1143 param
->alternate_path
= NULL
;
1144 param
->remote_ca_guid
= req_msg
->local_ca_guid
;
1145 param
->remote_qkey
= be32_to_cpu(req_msg
->local_qkey
);
1146 param
->remote_qpn
= be32_to_cpu(cm_req_get_local_qpn(req_msg
));
1147 param
->qp_type
= cm_req_get_qp_type(req_msg
);
1148 param
->starting_psn
= be32_to_cpu(cm_req_get_starting_psn(req_msg
));
1149 param
->responder_resources
= cm_req_get_init_depth(req_msg
);
1150 param
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1151 param
->local_cm_response_timeout
=
1152 cm_req_get_remote_resp_timeout(req_msg
);
1153 param
->flow_control
= cm_req_get_flow_ctrl(req_msg
);
1154 param
->remote_cm_response_timeout
=
1155 cm_req_get_local_resp_timeout(req_msg
);
1156 param
->retry_count
= cm_req_get_retry_count(req_msg
);
1157 param
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1158 param
->srq
= cm_req_get_srq(req_msg
);
1159 work
->cm_event
.private_data
= &req_msg
->private_data
;
1162 static void cm_process_work(struct cm_id_private
*cm_id_priv
,
1163 struct cm_work
*work
)
1165 unsigned long flags
;
1168 /* We will typically only have the current event to report. */
1169 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &work
->cm_event
);
1172 while (!ret
&& !atomic_add_negative(-1, &cm_id_priv
->work_count
)) {
1173 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1174 work
= cm_dequeue_work(cm_id_priv
);
1175 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1177 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
,
1181 cm_deref_id(cm_id_priv
);
1183 cm_destroy_id(&cm_id_priv
->id
, ret
);
1186 static void cm_format_mra(struct cm_mra_msg
*mra_msg
,
1187 struct cm_id_private
*cm_id_priv
,
1188 enum cm_msg_response msg_mraed
, u8 service_timeout
,
1189 const void *private_data
, u8 private_data_len
)
1191 cm_format_mad_hdr(&mra_msg
->hdr
, CM_MRA_ATTR_ID
, cm_id_priv
->tid
);
1192 cm_mra_set_msg_mraed(mra_msg
, msg_mraed
);
1193 mra_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1194 mra_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1195 cm_mra_set_service_timeout(mra_msg
, service_timeout
);
1197 if (private_data
&& private_data_len
)
1198 memcpy(mra_msg
->private_data
, private_data
, private_data_len
);
1201 static void cm_format_rej(struct cm_rej_msg
*rej_msg
,
1202 struct cm_id_private
*cm_id_priv
,
1203 enum ib_cm_rej_reason reason
,
1206 const void *private_data
,
1207 u8 private_data_len
)
1209 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, cm_id_priv
->tid
);
1210 rej_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1212 switch(cm_id_priv
->id
.state
) {
1213 case IB_CM_REQ_RCVD
:
1214 rej_msg
->local_comm_id
= 0;
1215 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1217 case IB_CM_MRA_REQ_SENT
:
1218 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1219 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1221 case IB_CM_REP_RCVD
:
1222 case IB_CM_MRA_REP_SENT
:
1223 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1224 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REP
);
1227 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1228 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_OTHER
);
1232 rej_msg
->reason
= cpu_to_be16(reason
);
1233 if (ari
&& ari_length
) {
1234 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1235 memcpy(rej_msg
->ari
, ari
, ari_length
);
1238 if (private_data
&& private_data_len
)
1239 memcpy(rej_msg
->private_data
, private_data
, private_data_len
);
1242 static void cm_dup_req_handler(struct cm_work
*work
,
1243 struct cm_id_private
*cm_id_priv
)
1245 struct ib_mad_send_buf
*msg
= NULL
;
1246 unsigned long flags
;
1249 /* Quick state check to discard duplicate REQs. */
1250 if (cm_id_priv
->id
.state
== IB_CM_REQ_RCVD
)
1253 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1257 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1258 switch (cm_id_priv
->id
.state
) {
1259 case IB_CM_MRA_REQ_SENT
:
1260 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1261 CM_MSG_RESPONSE_REQ
, cm_id_priv
->service_timeout
,
1262 cm_id_priv
->private_data
,
1263 cm_id_priv
->private_data_len
);
1265 case IB_CM_TIMEWAIT
:
1266 cm_format_rej((struct cm_rej_msg
*) msg
->mad
, cm_id_priv
,
1267 IB_CM_REJ_STALE_CONN
, NULL
, 0, NULL
, 0);
1272 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1274 ret
= ib_post_send_mad(msg
, NULL
);
1279 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1280 free
: cm_free_msg(msg
);
1283 static struct cm_id_private
* cm_match_req(struct cm_work
*work
,
1284 struct cm_id_private
*cm_id_priv
)
1286 struct cm_id_private
*listen_cm_id_priv
, *cur_cm_id_priv
;
1287 struct cm_timewait_info
*timewait_info
;
1288 struct cm_req_msg
*req_msg
;
1289 unsigned long flags
;
1291 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1293 /* Check for duplicate REQ and stale connections. */
1294 spin_lock_irqsave(&cm
.lock
, flags
);
1295 timewait_info
= cm_insert_remote_id(cm_id_priv
->timewait_info
);
1297 timewait_info
= cm_insert_remote_qpn(cm_id_priv
->timewait_info
);
1299 if (timewait_info
) {
1300 cur_cm_id_priv
= cm_get_id(timewait_info
->work
.local_id
,
1301 timewait_info
->work
.remote_id
);
1302 spin_unlock_irqrestore(&cm
.lock
, flags
);
1303 if (cur_cm_id_priv
) {
1304 cm_dup_req_handler(work
, cur_cm_id_priv
);
1305 cm_deref_id(cur_cm_id_priv
);
1307 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1308 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REQ
,
1313 /* Find matching listen request. */
1314 listen_cm_id_priv
= cm_find_listen(cm_id_priv
->id
.device
,
1315 req_msg
->service_id
,
1316 req_msg
->private_data
);
1317 if (!listen_cm_id_priv
) {
1318 spin_unlock_irqrestore(&cm
.lock
, flags
);
1319 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1320 IB_CM_REJ_INVALID_SERVICE_ID
, CM_MSG_RESPONSE_REQ
,
1324 atomic_inc(&listen_cm_id_priv
->refcount
);
1325 atomic_inc(&cm_id_priv
->refcount
);
1326 cm_id_priv
->id
.state
= IB_CM_REQ_RCVD
;
1327 atomic_inc(&cm_id_priv
->work_count
);
1328 spin_unlock_irqrestore(&cm
.lock
, flags
);
1329 return listen_cm_id_priv
;
1331 error
: cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1335 static int cm_req_handler(struct cm_work
*work
)
1337 struct ib_cm_id
*cm_id
;
1338 struct cm_id_private
*cm_id_priv
, *listen_cm_id_priv
;
1339 struct cm_req_msg
*req_msg
;
1342 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1344 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->device
, NULL
, NULL
);
1346 return PTR_ERR(cm_id
);
1348 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1349 cm_id_priv
->id
.remote_id
= req_msg
->local_comm_id
;
1350 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
1351 work
->mad_recv_wc
->recv_buf
.grh
,
1353 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
1355 if (IS_ERR(cm_id_priv
->timewait_info
)) {
1356 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
1359 cm_id_priv
->timewait_info
->work
.remote_id
= req_msg
->local_comm_id
;
1360 cm_id_priv
->timewait_info
->remote_ca_guid
= req_msg
->local_ca_guid
;
1361 cm_id_priv
->timewait_info
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1363 listen_cm_id_priv
= cm_match_req(work
, cm_id_priv
);
1364 if (!listen_cm_id_priv
) {
1369 cm_id_priv
->id
.cm_handler
= listen_cm_id_priv
->id
.cm_handler
;
1370 cm_id_priv
->id
.context
= listen_cm_id_priv
->id
.context
;
1371 cm_id_priv
->id
.service_id
= req_msg
->service_id
;
1372 cm_id_priv
->id
.service_mask
= __constant_cpu_to_be64(~0ULL);
1374 cm_format_paths_from_req(req_msg
, &work
->path
[0], &work
->path
[1]);
1375 ret
= cm_init_av_by_path(&work
->path
[0], &cm_id_priv
->av
);
1378 if (req_msg
->alt_local_lid
) {
1379 ret
= cm_init_av_by_path(&work
->path
[1], &cm_id_priv
->alt_av
);
1383 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1384 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1385 cm_req_get_local_resp_timeout(req_msg
));
1386 cm_id_priv
->max_cm_retries
= cm_req_get_max_cm_retries(req_msg
);
1387 cm_id_priv
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1388 cm_id_priv
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1389 cm_id_priv
->responder_resources
= cm_req_get_init_depth(req_msg
);
1390 cm_id_priv
->path_mtu
= cm_req_get_path_mtu(req_msg
);
1391 cm_id_priv
->sq_psn
= cm_req_get_starting_psn(req_msg
);
1392 cm_id_priv
->local_ack_timeout
=
1393 cm_req_get_primary_local_ack_timeout(req_msg
);
1394 cm_id_priv
->retry_count
= cm_req_get_retry_count(req_msg
);
1395 cm_id_priv
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1396 cm_id_priv
->qp_type
= cm_req_get_qp_type(req_msg
);
1398 cm_format_req_event(work
, cm_id_priv
, &listen_cm_id_priv
->id
);
1399 cm_process_work(cm_id_priv
, work
);
1400 cm_deref_id(listen_cm_id_priv
);
1403 error3
: atomic_dec(&cm_id_priv
->refcount
);
1404 cm_deref_id(listen_cm_id_priv
);
1405 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1406 error2
: kfree(cm_id_priv
->timewait_info
);
1407 cm_id_priv
->timewait_info
= NULL
;
1408 error1
: ib_destroy_cm_id(&cm_id_priv
->id
);
1412 static void cm_format_rep(struct cm_rep_msg
*rep_msg
,
1413 struct cm_id_private
*cm_id_priv
,
1414 struct ib_cm_rep_param
*param
)
1416 cm_format_mad_hdr(&rep_msg
->hdr
, CM_REP_ATTR_ID
, cm_id_priv
->tid
);
1417 rep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1418 rep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1419 cm_rep_set_local_qpn(rep_msg
, cpu_to_be32(param
->qp_num
));
1420 cm_rep_set_starting_psn(rep_msg
, cpu_to_be32(param
->starting_psn
));
1421 rep_msg
->resp_resources
= param
->responder_resources
;
1422 rep_msg
->initiator_depth
= param
->initiator_depth
;
1423 cm_rep_set_target_ack_delay(rep_msg
, param
->target_ack_delay
);
1424 cm_rep_set_failover(rep_msg
, param
->failover_accepted
);
1425 cm_rep_set_flow_ctrl(rep_msg
, param
->flow_control
);
1426 cm_rep_set_rnr_retry_count(rep_msg
, param
->rnr_retry_count
);
1427 cm_rep_set_srq(rep_msg
, param
->srq
);
1428 rep_msg
->local_ca_guid
= cm_id_priv
->av
.port
->cm_dev
->ca_guid
;
1430 if (param
->private_data
&& param
->private_data_len
)
1431 memcpy(rep_msg
->private_data
, param
->private_data
,
1432 param
->private_data_len
);
1435 int ib_send_cm_rep(struct ib_cm_id
*cm_id
,
1436 struct ib_cm_rep_param
*param
)
1438 struct cm_id_private
*cm_id_priv
;
1439 struct ib_mad_send_buf
*msg
;
1440 struct cm_rep_msg
*rep_msg
;
1441 unsigned long flags
;
1444 if (param
->private_data
&&
1445 param
->private_data_len
> IB_CM_REP_PRIVATE_DATA_SIZE
)
1448 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1449 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1450 if (cm_id
->state
!= IB_CM_REQ_RCVD
&&
1451 cm_id
->state
!= IB_CM_MRA_REQ_SENT
) {
1456 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1460 rep_msg
= (struct cm_rep_msg
*) msg
->mad
;
1461 cm_format_rep(rep_msg
, cm_id_priv
, param
);
1462 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1463 msg
->context
[1] = (void *) (unsigned long) IB_CM_REP_SENT
;
1465 ret
= ib_post_send_mad(msg
, NULL
);
1467 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1472 cm_id
->state
= IB_CM_REP_SENT
;
1473 cm_id_priv
->msg
= msg
;
1474 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1475 cm_id_priv
->responder_resources
= param
->responder_resources
;
1476 cm_id_priv
->rq_psn
= cm_rep_get_starting_psn(rep_msg
);
1477 cm_id_priv
->local_qpn
= cm_rep_get_local_qpn(rep_msg
);
1479 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1482 EXPORT_SYMBOL(ib_send_cm_rep
);
1484 static void cm_format_rtu(struct cm_rtu_msg
*rtu_msg
,
1485 struct cm_id_private
*cm_id_priv
,
1486 const void *private_data
,
1487 u8 private_data_len
)
1489 cm_format_mad_hdr(&rtu_msg
->hdr
, CM_RTU_ATTR_ID
, cm_id_priv
->tid
);
1490 rtu_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1491 rtu_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1493 if (private_data
&& private_data_len
)
1494 memcpy(rtu_msg
->private_data
, private_data
, private_data_len
);
1497 int ib_send_cm_rtu(struct ib_cm_id
*cm_id
,
1498 const void *private_data
,
1499 u8 private_data_len
)
1501 struct cm_id_private
*cm_id_priv
;
1502 struct ib_mad_send_buf
*msg
;
1503 unsigned long flags
;
1507 if (private_data
&& private_data_len
> IB_CM_RTU_PRIVATE_DATA_SIZE
)
1510 data
= cm_copy_private_data(private_data
, private_data_len
);
1512 return PTR_ERR(data
);
1514 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1515 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1516 if (cm_id
->state
!= IB_CM_REP_RCVD
&&
1517 cm_id
->state
!= IB_CM_MRA_REP_SENT
) {
1522 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1526 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1527 private_data
, private_data_len
);
1529 ret
= ib_post_send_mad(msg
, NULL
);
1531 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1537 cm_id
->state
= IB_CM_ESTABLISHED
;
1538 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1539 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1542 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1546 EXPORT_SYMBOL(ib_send_cm_rtu
);
1548 static void cm_format_rep_event(struct cm_work
*work
)
1550 struct cm_rep_msg
*rep_msg
;
1551 struct ib_cm_rep_event_param
*param
;
1553 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1554 param
= &work
->cm_event
.param
.rep_rcvd
;
1555 param
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1556 param
->remote_qkey
= be32_to_cpu(rep_msg
->local_qkey
);
1557 param
->remote_qpn
= be32_to_cpu(cm_rep_get_local_qpn(rep_msg
));
1558 param
->starting_psn
= be32_to_cpu(cm_rep_get_starting_psn(rep_msg
));
1559 param
->responder_resources
= rep_msg
->initiator_depth
;
1560 param
->initiator_depth
= rep_msg
->resp_resources
;
1561 param
->target_ack_delay
= cm_rep_get_target_ack_delay(rep_msg
);
1562 param
->failover_accepted
= cm_rep_get_failover(rep_msg
);
1563 param
->flow_control
= cm_rep_get_flow_ctrl(rep_msg
);
1564 param
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1565 param
->srq
= cm_rep_get_srq(rep_msg
);
1566 work
->cm_event
.private_data
= &rep_msg
->private_data
;
1569 static void cm_dup_rep_handler(struct cm_work
*work
)
1571 struct cm_id_private
*cm_id_priv
;
1572 struct cm_rep_msg
*rep_msg
;
1573 struct ib_mad_send_buf
*msg
= NULL
;
1574 unsigned long flags
;
1577 rep_msg
= (struct cm_rep_msg
*) work
->mad_recv_wc
->recv_buf
.mad
;
1578 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
,
1579 rep_msg
->local_comm_id
);
1583 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1587 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1588 if (cm_id_priv
->id
.state
== IB_CM_ESTABLISHED
)
1589 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1590 cm_id_priv
->private_data
,
1591 cm_id_priv
->private_data_len
);
1592 else if (cm_id_priv
->id
.state
== IB_CM_MRA_REP_SENT
)
1593 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1594 CM_MSG_RESPONSE_REP
, cm_id_priv
->service_timeout
,
1595 cm_id_priv
->private_data
,
1596 cm_id_priv
->private_data_len
);
1599 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1601 ret
= ib_post_send_mad(msg
, NULL
);
1606 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1607 free
: cm_free_msg(msg
);
1608 deref
: cm_deref_id(cm_id_priv
);
1611 static int cm_rep_handler(struct cm_work
*work
)
1613 struct cm_id_private
*cm_id_priv
;
1614 struct cm_rep_msg
*rep_msg
;
1615 unsigned long flags
;
1618 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1619 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
, 0);
1621 cm_dup_rep_handler(work
);
1625 cm_format_rep_event(work
);
1627 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1628 switch (cm_id_priv
->id
.state
) {
1629 case IB_CM_REQ_SENT
:
1630 case IB_CM_MRA_REQ_RCVD
:
1633 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1638 cm_id_priv
->timewait_info
->work
.remote_id
= rep_msg
->local_comm_id
;
1639 cm_id_priv
->timewait_info
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1640 cm_id_priv
->timewait_info
->remote_qpn
= cm_rep_get_local_qpn(rep_msg
);
1642 spin_lock(&cm
.lock
);
1643 /* Check for duplicate REP. */
1644 if (cm_insert_remote_id(cm_id_priv
->timewait_info
)) {
1645 spin_unlock(&cm
.lock
);
1646 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1650 /* Check for a stale connection. */
1651 if (cm_insert_remote_qpn(cm_id_priv
->timewait_info
)) {
1652 rb_erase(&cm_id_priv
->timewait_info
->remote_id_node
,
1653 &cm
.remote_id_table
);
1654 cm_id_priv
->timewait_info
->inserted_remote_id
= 0;
1655 spin_unlock(&cm
.lock
);
1656 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1657 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1658 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REP
,
1663 spin_unlock(&cm
.lock
);
1665 cm_id_priv
->id
.state
= IB_CM_REP_RCVD
;
1666 cm_id_priv
->id
.remote_id
= rep_msg
->local_comm_id
;
1667 cm_id_priv
->remote_qpn
= cm_rep_get_local_qpn(rep_msg
);
1668 cm_id_priv
->initiator_depth
= rep_msg
->resp_resources
;
1669 cm_id_priv
->responder_resources
= rep_msg
->initiator_depth
;
1670 cm_id_priv
->sq_psn
= cm_rep_get_starting_psn(rep_msg
);
1671 cm_id_priv
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1673 /* todo: handle peer_to_peer */
1675 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1676 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1678 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1679 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1682 cm_process_work(cm_id_priv
, work
);
1684 cm_deref_id(cm_id_priv
);
1688 cm_deref_id(cm_id_priv
);
1692 static int cm_establish_handler(struct cm_work
*work
)
1694 struct cm_id_private
*cm_id_priv
;
1695 unsigned long flags
;
1698 /* See comment in ib_cm_establish about lookup. */
1699 cm_id_priv
= cm_acquire_id(work
->local_id
, work
->remote_id
);
1703 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1704 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
) {
1705 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1709 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1710 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1712 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1713 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1716 cm_process_work(cm_id_priv
, work
);
1718 cm_deref_id(cm_id_priv
);
1721 cm_deref_id(cm_id_priv
);
1725 static int cm_rtu_handler(struct cm_work
*work
)
1727 struct cm_id_private
*cm_id_priv
;
1728 struct cm_rtu_msg
*rtu_msg
;
1729 unsigned long flags
;
1732 rtu_msg
= (struct cm_rtu_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1733 cm_id_priv
= cm_acquire_id(rtu_msg
->remote_comm_id
,
1734 rtu_msg
->local_comm_id
);
1738 work
->cm_event
.private_data
= &rtu_msg
->private_data
;
1740 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1741 if (cm_id_priv
->id
.state
!= IB_CM_REP_SENT
&&
1742 cm_id_priv
->id
.state
!= IB_CM_MRA_REP_RCVD
) {
1743 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1746 cm_id_priv
->id
.state
= IB_CM_ESTABLISHED
;
1748 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1749 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1751 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1752 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1755 cm_process_work(cm_id_priv
, work
);
1757 cm_deref_id(cm_id_priv
);
1760 cm_deref_id(cm_id_priv
);
1764 static void cm_format_dreq(struct cm_dreq_msg
*dreq_msg
,
1765 struct cm_id_private
*cm_id_priv
,
1766 const void *private_data
,
1767 u8 private_data_len
)
1769 cm_format_mad_hdr(&dreq_msg
->hdr
, CM_DREQ_ATTR_ID
,
1770 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_DREQ
));
1771 dreq_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1772 dreq_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1773 cm_dreq_set_remote_qpn(dreq_msg
, cm_id_priv
->remote_qpn
);
1775 if (private_data
&& private_data_len
)
1776 memcpy(dreq_msg
->private_data
, private_data
, private_data_len
);
1779 int ib_send_cm_dreq(struct ib_cm_id
*cm_id
,
1780 const void *private_data
,
1781 u8 private_data_len
)
1783 struct cm_id_private
*cm_id_priv
;
1784 struct ib_mad_send_buf
*msg
;
1785 unsigned long flags
;
1788 if (private_data
&& private_data_len
> IB_CM_DREQ_PRIVATE_DATA_SIZE
)
1791 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1792 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1793 if (cm_id
->state
!= IB_CM_ESTABLISHED
) {
1798 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1800 cm_enter_timewait(cm_id_priv
);
1804 cm_format_dreq((struct cm_dreq_msg
*) msg
->mad
, cm_id_priv
,
1805 private_data
, private_data_len
);
1806 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1807 msg
->context
[1] = (void *) (unsigned long) IB_CM_DREQ_SENT
;
1809 ret
= ib_post_send_mad(msg
, NULL
);
1811 cm_enter_timewait(cm_id_priv
);
1812 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1817 cm_id
->state
= IB_CM_DREQ_SENT
;
1818 cm_id_priv
->msg
= msg
;
1819 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1822 EXPORT_SYMBOL(ib_send_cm_dreq
);
1824 static void cm_format_drep(struct cm_drep_msg
*drep_msg
,
1825 struct cm_id_private
*cm_id_priv
,
1826 const void *private_data
,
1827 u8 private_data_len
)
1829 cm_format_mad_hdr(&drep_msg
->hdr
, CM_DREP_ATTR_ID
, cm_id_priv
->tid
);
1830 drep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1831 drep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1833 if (private_data
&& private_data_len
)
1834 memcpy(drep_msg
->private_data
, private_data
, private_data_len
);
1837 int ib_send_cm_drep(struct ib_cm_id
*cm_id
,
1838 const void *private_data
,
1839 u8 private_data_len
)
1841 struct cm_id_private
*cm_id_priv
;
1842 struct ib_mad_send_buf
*msg
;
1843 unsigned long flags
;
1847 if (private_data
&& private_data_len
> IB_CM_DREP_PRIVATE_DATA_SIZE
)
1850 data
= cm_copy_private_data(private_data
, private_data_len
);
1852 return PTR_ERR(data
);
1854 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1855 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1856 if (cm_id
->state
!= IB_CM_DREQ_RCVD
) {
1857 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1862 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1863 cm_enter_timewait(cm_id_priv
);
1865 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1869 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
1870 private_data
, private_data_len
);
1872 ret
= ib_post_send_mad(msg
, NULL
);
1874 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1879 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1882 EXPORT_SYMBOL(ib_send_cm_drep
);
1884 static int cm_dreq_handler(struct cm_work
*work
)
1886 struct cm_id_private
*cm_id_priv
;
1887 struct cm_dreq_msg
*dreq_msg
;
1888 struct ib_mad_send_buf
*msg
= NULL
;
1889 unsigned long flags
;
1892 dreq_msg
= (struct cm_dreq_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1893 cm_id_priv
= cm_acquire_id(dreq_msg
->remote_comm_id
,
1894 dreq_msg
->local_comm_id
);
1898 work
->cm_event
.private_data
= &dreq_msg
->private_data
;
1900 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1901 if (cm_id_priv
->local_qpn
!= cm_dreq_get_remote_qpn(dreq_msg
))
1904 switch (cm_id_priv
->id
.state
) {
1905 case IB_CM_REP_SENT
:
1906 case IB_CM_DREQ_SENT
:
1907 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1909 case IB_CM_ESTABLISHED
:
1910 case IB_CM_MRA_REP_RCVD
:
1912 case IB_CM_TIMEWAIT
:
1913 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
1916 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
1917 cm_id_priv
->private_data
,
1918 cm_id_priv
->private_data_len
);
1919 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1921 if (ib_post_send_mad(msg
, NULL
))
1927 cm_id_priv
->id
.state
= IB_CM_DREQ_RCVD
;
1928 cm_id_priv
->tid
= dreq_msg
->hdr
.tid
;
1929 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1931 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1932 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1935 cm_process_work(cm_id_priv
, work
);
1937 cm_deref_id(cm_id_priv
);
1940 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1941 deref
: cm_deref_id(cm_id_priv
);
1945 static int cm_drep_handler(struct cm_work
*work
)
1947 struct cm_id_private
*cm_id_priv
;
1948 struct cm_drep_msg
*drep_msg
;
1949 unsigned long flags
;
1952 drep_msg
= (struct cm_drep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1953 cm_id_priv
= cm_acquire_id(drep_msg
->remote_comm_id
,
1954 drep_msg
->local_comm_id
);
1958 work
->cm_event
.private_data
= &drep_msg
->private_data
;
1960 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1961 if (cm_id_priv
->id
.state
!= IB_CM_DREQ_SENT
&&
1962 cm_id_priv
->id
.state
!= IB_CM_DREQ_RCVD
) {
1963 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1966 cm_enter_timewait(cm_id_priv
);
1968 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1969 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1971 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1972 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1975 cm_process_work(cm_id_priv
, work
);
1977 cm_deref_id(cm_id_priv
);
1980 cm_deref_id(cm_id_priv
);
1984 int ib_send_cm_rej(struct ib_cm_id
*cm_id
,
1985 enum ib_cm_rej_reason reason
,
1988 const void *private_data
,
1989 u8 private_data_len
)
1991 struct cm_id_private
*cm_id_priv
;
1992 struct ib_mad_send_buf
*msg
;
1993 unsigned long flags
;
1996 if ((private_data
&& private_data_len
> IB_CM_REJ_PRIVATE_DATA_SIZE
) ||
1997 (ari
&& ari_length
> IB_CM_REJ_ARI_LENGTH
))
2000 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2002 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2003 switch (cm_id
->state
) {
2004 case IB_CM_REQ_SENT
:
2005 case IB_CM_MRA_REQ_RCVD
:
2006 case IB_CM_REQ_RCVD
:
2007 case IB_CM_MRA_REQ_SENT
:
2008 case IB_CM_REP_RCVD
:
2009 case IB_CM_MRA_REP_SENT
:
2010 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2012 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
2013 cm_id_priv
, reason
, ari
, ari_length
,
2014 private_data
, private_data_len
);
2016 cm_reset_to_idle(cm_id_priv
);
2018 case IB_CM_REP_SENT
:
2019 case IB_CM_MRA_REP_RCVD
:
2020 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2022 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
2023 cm_id_priv
, reason
, ari
, ari_length
,
2024 private_data
, private_data_len
);
2026 cm_enter_timewait(cm_id_priv
);
2036 ret
= ib_post_send_mad(msg
, NULL
);
2040 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2043 EXPORT_SYMBOL(ib_send_cm_rej
);
2045 static void cm_format_rej_event(struct cm_work
*work
)
2047 struct cm_rej_msg
*rej_msg
;
2048 struct ib_cm_rej_event_param
*param
;
2050 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2051 param
= &work
->cm_event
.param
.rej_rcvd
;
2052 param
->ari
= rej_msg
->ari
;
2053 param
->ari_length
= cm_rej_get_reject_info_len(rej_msg
);
2054 param
->reason
= __be16_to_cpu(rej_msg
->reason
);
2055 work
->cm_event
.private_data
= &rej_msg
->private_data
;
2058 static struct cm_id_private
* cm_acquire_rejected_id(struct cm_rej_msg
*rej_msg
)
2060 struct cm_timewait_info
*timewait_info
;
2061 struct cm_id_private
*cm_id_priv
;
2062 unsigned long flags
;
2065 remote_id
= rej_msg
->local_comm_id
;
2067 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_TIMEOUT
) {
2068 spin_lock_irqsave(&cm
.lock
, flags
);
2069 timewait_info
= cm_find_remote_id( *((__be64
*) rej_msg
->ari
),
2071 if (!timewait_info
) {
2072 spin_unlock_irqrestore(&cm
.lock
, flags
);
2075 cm_id_priv
= idr_find(&cm
.local_id_table
,
2076 (__force
int) timewait_info
->work
.local_id
);
2078 if (cm_id_priv
->id
.remote_id
== remote_id
)
2079 atomic_inc(&cm_id_priv
->refcount
);
2083 spin_unlock_irqrestore(&cm
.lock
, flags
);
2084 } else if (cm_rej_get_msg_rejected(rej_msg
) == CM_MSG_RESPONSE_REQ
)
2085 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, 0);
2087 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, remote_id
);
2092 static int cm_rej_handler(struct cm_work
*work
)
2094 struct cm_id_private
*cm_id_priv
;
2095 struct cm_rej_msg
*rej_msg
;
2096 unsigned long flags
;
2099 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2100 cm_id_priv
= cm_acquire_rejected_id(rej_msg
);
2104 cm_format_rej_event(work
);
2106 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2107 switch (cm_id_priv
->id
.state
) {
2108 case IB_CM_REQ_SENT
:
2109 case IB_CM_MRA_REQ_RCVD
:
2110 case IB_CM_REP_SENT
:
2111 case IB_CM_MRA_REP_RCVD
:
2112 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2114 case IB_CM_REQ_RCVD
:
2115 case IB_CM_MRA_REQ_SENT
:
2116 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_STALE_CONN
)
2117 cm_enter_timewait(cm_id_priv
);
2119 cm_reset_to_idle(cm_id_priv
);
2121 case IB_CM_DREQ_SENT
:
2122 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2124 case IB_CM_REP_RCVD
:
2125 case IB_CM_MRA_REP_SENT
:
2126 case IB_CM_ESTABLISHED
:
2127 cm_enter_timewait(cm_id_priv
);
2130 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2135 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2137 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2138 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2141 cm_process_work(cm_id_priv
, work
);
2143 cm_deref_id(cm_id_priv
);
2146 cm_deref_id(cm_id_priv
);
2150 int ib_send_cm_mra(struct ib_cm_id
*cm_id
,
2152 const void *private_data
,
2153 u8 private_data_len
)
2155 struct cm_id_private
*cm_id_priv
;
2156 struct ib_mad_send_buf
*msg
;
2158 unsigned long flags
;
2161 if (private_data
&& private_data_len
> IB_CM_MRA_PRIVATE_DATA_SIZE
)
2164 data
= cm_copy_private_data(private_data
, private_data_len
);
2166 return PTR_ERR(data
);
2168 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2170 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2171 switch(cm_id_priv
->id
.state
) {
2172 case IB_CM_REQ_RCVD
:
2173 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2177 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2178 CM_MSG_RESPONSE_REQ
, service_timeout
,
2179 private_data
, private_data_len
);
2180 ret
= ib_post_send_mad(msg
, NULL
);
2183 cm_id
->state
= IB_CM_MRA_REQ_SENT
;
2185 case IB_CM_REP_RCVD
:
2186 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2190 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2191 CM_MSG_RESPONSE_REP
, service_timeout
,
2192 private_data
, private_data_len
);
2193 ret
= ib_post_send_mad(msg
, NULL
);
2196 cm_id
->state
= IB_CM_MRA_REP_SENT
;
2198 case IB_CM_ESTABLISHED
:
2199 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2203 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2204 CM_MSG_RESPONSE_OTHER
, service_timeout
,
2205 private_data
, private_data_len
);
2206 ret
= ib_post_send_mad(msg
, NULL
);
2209 cm_id
->lap_state
= IB_CM_MRA_LAP_SENT
;
2215 cm_id_priv
->service_timeout
= service_timeout
;
2216 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
2217 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2220 error1
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2224 error2
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2229 EXPORT_SYMBOL(ib_send_cm_mra
);
2231 static struct cm_id_private
* cm_acquire_mraed_id(struct cm_mra_msg
*mra_msg
)
2233 switch (cm_mra_get_msg_mraed(mra_msg
)) {
2234 case CM_MSG_RESPONSE_REQ
:
2235 return cm_acquire_id(mra_msg
->remote_comm_id
, 0);
2236 case CM_MSG_RESPONSE_REP
:
2237 case CM_MSG_RESPONSE_OTHER
:
2238 return cm_acquire_id(mra_msg
->remote_comm_id
,
2239 mra_msg
->local_comm_id
);
2245 static int cm_mra_handler(struct cm_work
*work
)
2247 struct cm_id_private
*cm_id_priv
;
2248 struct cm_mra_msg
*mra_msg
;
2249 unsigned long flags
;
2252 mra_msg
= (struct cm_mra_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2253 cm_id_priv
= cm_acquire_mraed_id(mra_msg
);
2257 work
->cm_event
.private_data
= &mra_msg
->private_data
;
2258 work
->cm_event
.param
.mra_rcvd
.service_timeout
=
2259 cm_mra_get_service_timeout(mra_msg
);
2260 timeout
= cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg
)) +
2261 cm_convert_to_ms(cm_id_priv
->av
.packet_life_time
);
2263 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2264 switch (cm_id_priv
->id
.state
) {
2265 case IB_CM_REQ_SENT
:
2266 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REQ
||
2267 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2268 cm_id_priv
->msg
, timeout
))
2270 cm_id_priv
->id
.state
= IB_CM_MRA_REQ_RCVD
;
2272 case IB_CM_REP_SENT
:
2273 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REP
||
2274 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2275 cm_id_priv
->msg
, timeout
))
2277 cm_id_priv
->id
.state
= IB_CM_MRA_REP_RCVD
;
2279 case IB_CM_ESTABLISHED
:
2280 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_OTHER
||
2281 cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
||
2282 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2283 cm_id_priv
->msg
, timeout
))
2285 cm_id_priv
->id
.lap_state
= IB_CM_MRA_LAP_RCVD
;
2291 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long)
2292 cm_id_priv
->id
.state
;
2293 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2295 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2296 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2299 cm_process_work(cm_id_priv
, work
);
2301 cm_deref_id(cm_id_priv
);
2304 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2305 cm_deref_id(cm_id_priv
);
2309 static void cm_format_lap(struct cm_lap_msg
*lap_msg
,
2310 struct cm_id_private
*cm_id_priv
,
2311 struct ib_sa_path_rec
*alternate_path
,
2312 const void *private_data
,
2313 u8 private_data_len
)
2315 cm_format_mad_hdr(&lap_msg
->hdr
, CM_LAP_ATTR_ID
,
2316 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_LAP
));
2317 lap_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2318 lap_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2319 cm_lap_set_remote_qpn(lap_msg
, cm_id_priv
->remote_qpn
);
2320 /* todo: need remote CM response timeout */
2321 cm_lap_set_remote_resp_timeout(lap_msg
, 0x1F);
2322 lap_msg
->alt_local_lid
= alternate_path
->slid
;
2323 lap_msg
->alt_remote_lid
= alternate_path
->dlid
;
2324 lap_msg
->alt_local_gid
= alternate_path
->sgid
;
2325 lap_msg
->alt_remote_gid
= alternate_path
->dgid
;
2326 cm_lap_set_flow_label(lap_msg
, alternate_path
->flow_label
);
2327 cm_lap_set_traffic_class(lap_msg
, alternate_path
->traffic_class
);
2328 lap_msg
->alt_hop_limit
= alternate_path
->hop_limit
;
2329 cm_lap_set_packet_rate(lap_msg
, alternate_path
->rate
);
2330 cm_lap_set_sl(lap_msg
, alternate_path
->sl
);
2331 cm_lap_set_subnet_local(lap_msg
, 1); /* local only... */
2332 cm_lap_set_local_ack_timeout(lap_msg
,
2333 min(31, alternate_path
->packet_life_time
+ 1));
2335 if (private_data
&& private_data_len
)
2336 memcpy(lap_msg
->private_data
, private_data
, private_data_len
);
2339 int ib_send_cm_lap(struct ib_cm_id
*cm_id
,
2340 struct ib_sa_path_rec
*alternate_path
,
2341 const void *private_data
,
2342 u8 private_data_len
)
2344 struct cm_id_private
*cm_id_priv
;
2345 struct ib_mad_send_buf
*msg
;
2346 unsigned long flags
;
2349 if (private_data
&& private_data_len
> IB_CM_LAP_PRIVATE_DATA_SIZE
)
2352 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2353 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2354 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2355 cm_id
->lap_state
!= IB_CM_LAP_IDLE
) {
2360 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2364 cm_format_lap((struct cm_lap_msg
*) msg
->mad
, cm_id_priv
,
2365 alternate_path
, private_data
, private_data_len
);
2366 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2367 msg
->context
[1] = (void *) (unsigned long) IB_CM_ESTABLISHED
;
2369 ret
= ib_post_send_mad(msg
, NULL
);
2371 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2376 cm_id
->lap_state
= IB_CM_LAP_SENT
;
2377 cm_id_priv
->msg
= msg
;
2379 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2382 EXPORT_SYMBOL(ib_send_cm_lap
);
2384 static void cm_format_path_from_lap(struct ib_sa_path_rec
*path
,
2385 struct cm_lap_msg
*lap_msg
)
2387 memset(path
, 0, sizeof *path
);
2388 path
->dgid
= lap_msg
->alt_local_gid
;
2389 path
->sgid
= lap_msg
->alt_remote_gid
;
2390 path
->dlid
= lap_msg
->alt_local_lid
;
2391 path
->slid
= lap_msg
->alt_remote_lid
;
2392 path
->flow_label
= cm_lap_get_flow_label(lap_msg
);
2393 path
->hop_limit
= lap_msg
->alt_hop_limit
;
2394 path
->traffic_class
= cm_lap_get_traffic_class(lap_msg
);
2395 path
->reversible
= 1;
2396 /* pkey is same as in REQ */
2397 path
->sl
= cm_lap_get_sl(lap_msg
);
2398 path
->mtu_selector
= IB_SA_EQ
;
2399 /* mtu is same as in REQ */
2400 path
->rate_selector
= IB_SA_EQ
;
2401 path
->rate
= cm_lap_get_packet_rate(lap_msg
);
2402 path
->packet_life_time_selector
= IB_SA_EQ
;
2403 path
->packet_life_time
= cm_lap_get_local_ack_timeout(lap_msg
);
2404 path
->packet_life_time
-= (path
->packet_life_time
> 0);
2407 static int cm_lap_handler(struct cm_work
*work
)
2409 struct cm_id_private
*cm_id_priv
;
2410 struct cm_lap_msg
*lap_msg
;
2411 struct ib_cm_lap_event_param
*param
;
2412 struct ib_mad_send_buf
*msg
= NULL
;
2413 unsigned long flags
;
2416 /* todo: verify LAP request and send reject APR if invalid. */
2417 lap_msg
= (struct cm_lap_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2418 cm_id_priv
= cm_acquire_id(lap_msg
->remote_comm_id
,
2419 lap_msg
->local_comm_id
);
2423 param
= &work
->cm_event
.param
.lap_rcvd
;
2424 param
->alternate_path
= &work
->path
[0];
2425 cm_format_path_from_lap(param
->alternate_path
, lap_msg
);
2426 work
->cm_event
.private_data
= &lap_msg
->private_data
;
2428 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2429 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
)
2432 switch (cm_id_priv
->id
.lap_state
) {
2433 case IB_CM_LAP_IDLE
:
2435 case IB_CM_MRA_LAP_SENT
:
2436 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
2439 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2440 CM_MSG_RESPONSE_OTHER
,
2441 cm_id_priv
->service_timeout
,
2442 cm_id_priv
->private_data
,
2443 cm_id_priv
->private_data_len
);
2444 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2446 if (ib_post_send_mad(msg
, NULL
))
2453 cm_id_priv
->id
.lap_state
= IB_CM_LAP_RCVD
;
2454 cm_id_priv
->tid
= lap_msg
->hdr
.tid
;
2455 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2457 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2458 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2461 cm_process_work(cm_id_priv
, work
);
2463 cm_deref_id(cm_id_priv
);
2466 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2467 deref
: cm_deref_id(cm_id_priv
);
2471 static void cm_format_apr(struct cm_apr_msg
*apr_msg
,
2472 struct cm_id_private
*cm_id_priv
,
2473 enum ib_cm_apr_status status
,
2476 const void *private_data
,
2477 u8 private_data_len
)
2479 cm_format_mad_hdr(&apr_msg
->hdr
, CM_APR_ATTR_ID
, cm_id_priv
->tid
);
2480 apr_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2481 apr_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2482 apr_msg
->ap_status
= (u8
) status
;
2484 if (info
&& info_length
) {
2485 apr_msg
->info_length
= info_length
;
2486 memcpy(apr_msg
->info
, info
, info_length
);
2489 if (private_data
&& private_data_len
)
2490 memcpy(apr_msg
->private_data
, private_data
, private_data_len
);
2493 int ib_send_cm_apr(struct ib_cm_id
*cm_id
,
2494 enum ib_cm_apr_status status
,
2497 const void *private_data
,
2498 u8 private_data_len
)
2500 struct cm_id_private
*cm_id_priv
;
2501 struct ib_mad_send_buf
*msg
;
2502 unsigned long flags
;
2505 if ((private_data
&& private_data_len
> IB_CM_APR_PRIVATE_DATA_SIZE
) ||
2506 (info
&& info_length
> IB_CM_APR_INFO_LENGTH
))
2509 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2510 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2511 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2512 (cm_id
->lap_state
!= IB_CM_LAP_RCVD
&&
2513 cm_id
->lap_state
!= IB_CM_MRA_LAP_SENT
)) {
2518 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2522 cm_format_apr((struct cm_apr_msg
*) msg
->mad
, cm_id_priv
, status
,
2523 info
, info_length
, private_data
, private_data_len
);
2524 ret
= ib_post_send_mad(msg
, NULL
);
2526 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2531 cm_id
->lap_state
= IB_CM_LAP_IDLE
;
2532 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2535 EXPORT_SYMBOL(ib_send_cm_apr
);
2537 static int cm_apr_handler(struct cm_work
*work
)
2539 struct cm_id_private
*cm_id_priv
;
2540 struct cm_apr_msg
*apr_msg
;
2541 unsigned long flags
;
2544 apr_msg
= (struct cm_apr_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2545 cm_id_priv
= cm_acquire_id(apr_msg
->remote_comm_id
,
2546 apr_msg
->local_comm_id
);
2548 return -EINVAL
; /* Unmatched reply. */
2550 work
->cm_event
.param
.apr_rcvd
.ap_status
= apr_msg
->ap_status
;
2551 work
->cm_event
.param
.apr_rcvd
.apr_info
= &apr_msg
->info
;
2552 work
->cm_event
.param
.apr_rcvd
.info_len
= apr_msg
->info_length
;
2553 work
->cm_event
.private_data
= &apr_msg
->private_data
;
2555 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2556 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
||
2557 (cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
&&
2558 cm_id_priv
->id
.lap_state
!= IB_CM_MRA_LAP_RCVD
)) {
2559 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2562 cm_id_priv
->id
.lap_state
= IB_CM_LAP_IDLE
;
2563 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2564 cm_id_priv
->msg
= NULL
;
2566 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2568 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2569 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2572 cm_process_work(cm_id_priv
, work
);
2574 cm_deref_id(cm_id_priv
);
2577 cm_deref_id(cm_id_priv
);
2581 static int cm_timewait_handler(struct cm_work
*work
)
2583 struct cm_timewait_info
*timewait_info
;
2584 struct cm_id_private
*cm_id_priv
;
2585 unsigned long flags
;
2588 timewait_info
= (struct cm_timewait_info
*)work
;
2589 cm_cleanup_timewait(timewait_info
);
2591 cm_id_priv
= cm_acquire_id(timewait_info
->work
.local_id
,
2592 timewait_info
->work
.remote_id
);
2596 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2597 if (cm_id_priv
->id
.state
!= IB_CM_TIMEWAIT
||
2598 cm_id_priv
->remote_qpn
!= timewait_info
->remote_qpn
) {
2599 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2602 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2603 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2605 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2606 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2609 cm_process_work(cm_id_priv
, work
);
2611 cm_deref_id(cm_id_priv
);
2614 cm_deref_id(cm_id_priv
);
2618 static void cm_format_sidr_req(struct cm_sidr_req_msg
*sidr_req_msg
,
2619 struct cm_id_private
*cm_id_priv
,
2620 struct ib_cm_sidr_req_param
*param
)
2622 cm_format_mad_hdr(&sidr_req_msg
->hdr
, CM_SIDR_REQ_ATTR_ID
,
2623 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_SIDR
));
2624 sidr_req_msg
->request_id
= cm_id_priv
->id
.local_id
;
2625 sidr_req_msg
->pkey
= cpu_to_be16(param
->path
->pkey
);
2626 sidr_req_msg
->service_id
= param
->service_id
;
2628 if (param
->private_data
&& param
->private_data_len
)
2629 memcpy(sidr_req_msg
->private_data
, param
->private_data
,
2630 param
->private_data_len
);
2633 int ib_send_cm_sidr_req(struct ib_cm_id
*cm_id
,
2634 struct ib_cm_sidr_req_param
*param
)
2636 struct cm_id_private
*cm_id_priv
;
2637 struct ib_mad_send_buf
*msg
;
2638 unsigned long flags
;
2641 if (!param
->path
|| (param
->private_data
&&
2642 param
->private_data_len
> IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
))
2645 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2646 ret
= cm_init_av_by_path(param
->path
, &cm_id_priv
->av
);
2650 cm_id
->service_id
= param
->service_id
;
2651 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
2652 cm_id_priv
->timeout_ms
= param
->timeout_ms
;
2653 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
2654 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2658 cm_format_sidr_req((struct cm_sidr_req_msg
*) msg
->mad
, cm_id_priv
,
2660 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2661 msg
->context
[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT
;
2663 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2664 if (cm_id
->state
== IB_CM_IDLE
)
2665 ret
= ib_post_send_mad(msg
, NULL
);
2670 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2674 cm_id
->state
= IB_CM_SIDR_REQ_SENT
;
2675 cm_id_priv
->msg
= msg
;
2676 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2680 EXPORT_SYMBOL(ib_send_cm_sidr_req
);
2682 static void cm_format_sidr_req_event(struct cm_work
*work
,
2683 struct ib_cm_id
*listen_id
)
2685 struct cm_sidr_req_msg
*sidr_req_msg
;
2686 struct ib_cm_sidr_req_event_param
*param
;
2688 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2689 work
->mad_recv_wc
->recv_buf
.mad
;
2690 param
= &work
->cm_event
.param
.sidr_req_rcvd
;
2691 param
->pkey
= __be16_to_cpu(sidr_req_msg
->pkey
);
2692 param
->listen_id
= listen_id
;
2693 param
->port
= work
->port
->port_num
;
2694 work
->cm_event
.private_data
= &sidr_req_msg
->private_data
;
2697 static int cm_sidr_req_handler(struct cm_work
*work
)
2699 struct ib_cm_id
*cm_id
;
2700 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
2701 struct cm_sidr_req_msg
*sidr_req_msg
;
2703 unsigned long flags
;
2705 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->device
, NULL
, NULL
);
2707 return PTR_ERR(cm_id
);
2708 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2710 /* Record SGID/SLID and request ID for lookup. */
2711 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2712 work
->mad_recv_wc
->recv_buf
.mad
;
2713 wc
= work
->mad_recv_wc
->wc
;
2714 cm_id_priv
->av
.dgid
.global
.subnet_prefix
= cpu_to_be64(wc
->slid
);
2715 cm_id_priv
->av
.dgid
.global
.interface_id
= 0;
2716 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
2717 work
->mad_recv_wc
->recv_buf
.grh
,
2719 cm_id_priv
->id
.remote_id
= sidr_req_msg
->request_id
;
2720 cm_id_priv
->id
.state
= IB_CM_SIDR_REQ_RCVD
;
2721 cm_id_priv
->tid
= sidr_req_msg
->hdr
.tid
;
2722 atomic_inc(&cm_id_priv
->work_count
);
2724 spin_lock_irqsave(&cm
.lock
, flags
);
2725 cur_cm_id_priv
= cm_insert_remote_sidr(cm_id_priv
);
2726 if (cur_cm_id_priv
) {
2727 spin_unlock_irqrestore(&cm
.lock
, flags
);
2728 goto out
; /* Duplicate message. */
2730 cur_cm_id_priv
= cm_find_listen(cm_id
->device
,
2731 sidr_req_msg
->service_id
,
2732 sidr_req_msg
->private_data
);
2733 if (!cur_cm_id_priv
) {
2734 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
2735 spin_unlock_irqrestore(&cm
.lock
, flags
);
2736 /* todo: reply with no match */
2737 goto out
; /* No match. */
2739 atomic_inc(&cur_cm_id_priv
->refcount
);
2740 spin_unlock_irqrestore(&cm
.lock
, flags
);
2742 cm_id_priv
->id
.cm_handler
= cur_cm_id_priv
->id
.cm_handler
;
2743 cm_id_priv
->id
.context
= cur_cm_id_priv
->id
.context
;
2744 cm_id_priv
->id
.service_id
= sidr_req_msg
->service_id
;
2745 cm_id_priv
->id
.service_mask
= __constant_cpu_to_be64(~0ULL);
2747 cm_format_sidr_req_event(work
, &cur_cm_id_priv
->id
);
2748 cm_process_work(cm_id_priv
, work
);
2749 cm_deref_id(cur_cm_id_priv
);
2752 ib_destroy_cm_id(&cm_id_priv
->id
);
2756 static void cm_format_sidr_rep(struct cm_sidr_rep_msg
*sidr_rep_msg
,
2757 struct cm_id_private
*cm_id_priv
,
2758 struct ib_cm_sidr_rep_param
*param
)
2760 cm_format_mad_hdr(&sidr_rep_msg
->hdr
, CM_SIDR_REP_ATTR_ID
,
2762 sidr_rep_msg
->request_id
= cm_id_priv
->id
.remote_id
;
2763 sidr_rep_msg
->status
= param
->status
;
2764 cm_sidr_rep_set_qpn(sidr_rep_msg
, cpu_to_be32(param
->qp_num
));
2765 sidr_rep_msg
->service_id
= cm_id_priv
->id
.service_id
;
2766 sidr_rep_msg
->qkey
= cpu_to_be32(param
->qkey
);
2768 if (param
->info
&& param
->info_length
)
2769 memcpy(sidr_rep_msg
->info
, param
->info
, param
->info_length
);
2771 if (param
->private_data
&& param
->private_data_len
)
2772 memcpy(sidr_rep_msg
->private_data
, param
->private_data
,
2773 param
->private_data_len
);
2776 int ib_send_cm_sidr_rep(struct ib_cm_id
*cm_id
,
2777 struct ib_cm_sidr_rep_param
*param
)
2779 struct cm_id_private
*cm_id_priv
;
2780 struct ib_mad_send_buf
*msg
;
2781 unsigned long flags
;
2784 if ((param
->info
&& param
->info_length
> IB_CM_SIDR_REP_INFO_LENGTH
) ||
2785 (param
->private_data
&&
2786 param
->private_data_len
> IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
))
2789 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2790 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2791 if (cm_id
->state
!= IB_CM_SIDR_REQ_RCVD
) {
2796 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2800 cm_format_sidr_rep((struct cm_sidr_rep_msg
*) msg
->mad
, cm_id_priv
,
2802 ret
= ib_post_send_mad(msg
, NULL
);
2804 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2808 cm_id
->state
= IB_CM_IDLE
;
2809 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2811 spin_lock_irqsave(&cm
.lock
, flags
);
2812 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
2813 spin_unlock_irqrestore(&cm
.lock
, flags
);
2816 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2819 EXPORT_SYMBOL(ib_send_cm_sidr_rep
);
2821 static void cm_format_sidr_rep_event(struct cm_work
*work
)
2823 struct cm_sidr_rep_msg
*sidr_rep_msg
;
2824 struct ib_cm_sidr_rep_event_param
*param
;
2826 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
2827 work
->mad_recv_wc
->recv_buf
.mad
;
2828 param
= &work
->cm_event
.param
.sidr_rep_rcvd
;
2829 param
->status
= sidr_rep_msg
->status
;
2830 param
->qkey
= be32_to_cpu(sidr_rep_msg
->qkey
);
2831 param
->qpn
= be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg
));
2832 param
->info
= &sidr_rep_msg
->info
;
2833 param
->info_len
= sidr_rep_msg
->info_length
;
2834 work
->cm_event
.private_data
= &sidr_rep_msg
->private_data
;
2837 static int cm_sidr_rep_handler(struct cm_work
*work
)
2839 struct cm_sidr_rep_msg
*sidr_rep_msg
;
2840 struct cm_id_private
*cm_id_priv
;
2841 unsigned long flags
;
2843 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
2844 work
->mad_recv_wc
->recv_buf
.mad
;
2845 cm_id_priv
= cm_acquire_id(sidr_rep_msg
->request_id
, 0);
2847 return -EINVAL
; /* Unmatched reply. */
2849 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2850 if (cm_id_priv
->id
.state
!= IB_CM_SIDR_REQ_SENT
) {
2851 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2854 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2855 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2856 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2858 cm_format_sidr_rep_event(work
);
2859 cm_process_work(cm_id_priv
, work
);
2862 cm_deref_id(cm_id_priv
);
2866 static void cm_process_send_error(struct ib_mad_send_buf
*msg
,
2867 enum ib_wc_status wc_status
)
2869 struct cm_id_private
*cm_id_priv
;
2870 struct ib_cm_event cm_event
;
2871 enum ib_cm_state state
;
2872 unsigned long flags
;
2875 memset(&cm_event
, 0, sizeof cm_event
);
2876 cm_id_priv
= msg
->context
[0];
2878 /* Discard old sends or ones without a response. */
2879 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2880 state
= (enum ib_cm_state
) (unsigned long) msg
->context
[1];
2881 if (msg
!= cm_id_priv
->msg
|| state
!= cm_id_priv
->id
.state
)
2885 case IB_CM_REQ_SENT
:
2886 case IB_CM_MRA_REQ_RCVD
:
2887 cm_reset_to_idle(cm_id_priv
);
2888 cm_event
.event
= IB_CM_REQ_ERROR
;
2890 case IB_CM_REP_SENT
:
2891 case IB_CM_MRA_REP_RCVD
:
2892 cm_reset_to_idle(cm_id_priv
);
2893 cm_event
.event
= IB_CM_REP_ERROR
;
2895 case IB_CM_DREQ_SENT
:
2896 cm_enter_timewait(cm_id_priv
);
2897 cm_event
.event
= IB_CM_DREQ_ERROR
;
2899 case IB_CM_SIDR_REQ_SENT
:
2900 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2901 cm_event
.event
= IB_CM_SIDR_REQ_ERROR
;
2906 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2907 cm_event
.param
.send_status
= wc_status
;
2909 /* No other events can occur on the cm_id at this point. */
2910 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &cm_event
);
2913 ib_destroy_cm_id(&cm_id_priv
->id
);
2916 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2920 static void cm_send_handler(struct ib_mad_agent
*mad_agent
,
2921 struct ib_mad_send_wc
*mad_send_wc
)
2923 struct ib_mad_send_buf
*msg
= mad_send_wc
->send_buf
;
2925 switch (mad_send_wc
->status
) {
2927 case IB_WC_WR_FLUSH_ERR
:
2931 if (msg
->context
[0] && msg
->context
[1])
2932 cm_process_send_error(msg
, mad_send_wc
->status
);
2939 static void cm_work_handler(void *data
)
2941 struct cm_work
*work
= data
;
2944 switch (work
->cm_event
.event
) {
2945 case IB_CM_REQ_RECEIVED
:
2946 ret
= cm_req_handler(work
);
2948 case IB_CM_MRA_RECEIVED
:
2949 ret
= cm_mra_handler(work
);
2951 case IB_CM_REJ_RECEIVED
:
2952 ret
= cm_rej_handler(work
);
2954 case IB_CM_REP_RECEIVED
:
2955 ret
= cm_rep_handler(work
);
2957 case IB_CM_RTU_RECEIVED
:
2958 ret
= cm_rtu_handler(work
);
2960 case IB_CM_USER_ESTABLISHED
:
2961 ret
= cm_establish_handler(work
);
2963 case IB_CM_DREQ_RECEIVED
:
2964 ret
= cm_dreq_handler(work
);
2966 case IB_CM_DREP_RECEIVED
:
2967 ret
= cm_drep_handler(work
);
2969 case IB_CM_SIDR_REQ_RECEIVED
:
2970 ret
= cm_sidr_req_handler(work
);
2972 case IB_CM_SIDR_REP_RECEIVED
:
2973 ret
= cm_sidr_rep_handler(work
);
2975 case IB_CM_LAP_RECEIVED
:
2976 ret
= cm_lap_handler(work
);
2978 case IB_CM_APR_RECEIVED
:
2979 ret
= cm_apr_handler(work
);
2981 case IB_CM_TIMEWAIT_EXIT
:
2982 ret
= cm_timewait_handler(work
);
2992 int ib_cm_establish(struct ib_cm_id
*cm_id
)
2994 struct cm_id_private
*cm_id_priv
;
2995 struct cm_work
*work
;
2996 unsigned long flags
;
2999 work
= kmalloc(sizeof *work
, GFP_ATOMIC
);
3003 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3004 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3005 switch (cm_id
->state
)
3007 case IB_CM_REP_SENT
:
3008 case IB_CM_MRA_REP_RCVD
:
3009 cm_id
->state
= IB_CM_ESTABLISHED
;
3011 case IB_CM_ESTABLISHED
:
3018 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3026 * The CM worker thread may try to destroy the cm_id before it
3027 * can execute this work item. To prevent potential deadlock,
3028 * we need to find the cm_id once we're in the context of the
3029 * worker thread, rather than holding a reference on it.
3031 INIT_WORK(&work
->work
, cm_work_handler
, work
);
3032 work
->local_id
= cm_id
->local_id
;
3033 work
->remote_id
= cm_id
->remote_id
;
3034 work
->mad_recv_wc
= NULL
;
3035 work
->cm_event
.event
= IB_CM_USER_ESTABLISHED
;
3036 queue_work(cm
.wq
, &work
->work
);
3040 EXPORT_SYMBOL(ib_cm_establish
);
3042 static void cm_recv_handler(struct ib_mad_agent
*mad_agent
,
3043 struct ib_mad_recv_wc
*mad_recv_wc
)
3045 struct cm_work
*work
;
3046 enum ib_cm_event_type event
;
3049 switch (mad_recv_wc
->recv_buf
.mad
->mad_hdr
.attr_id
) {
3050 case CM_REQ_ATTR_ID
:
3051 paths
= 1 + (((struct cm_req_msg
*) mad_recv_wc
->recv_buf
.mad
)->
3052 alt_local_lid
!= 0);
3053 event
= IB_CM_REQ_RECEIVED
;
3055 case CM_MRA_ATTR_ID
:
3056 event
= IB_CM_MRA_RECEIVED
;
3058 case CM_REJ_ATTR_ID
:
3059 event
= IB_CM_REJ_RECEIVED
;
3061 case CM_REP_ATTR_ID
:
3062 event
= IB_CM_REP_RECEIVED
;
3064 case CM_RTU_ATTR_ID
:
3065 event
= IB_CM_RTU_RECEIVED
;
3067 case CM_DREQ_ATTR_ID
:
3068 event
= IB_CM_DREQ_RECEIVED
;
3070 case CM_DREP_ATTR_ID
:
3071 event
= IB_CM_DREP_RECEIVED
;
3073 case CM_SIDR_REQ_ATTR_ID
:
3074 event
= IB_CM_SIDR_REQ_RECEIVED
;
3076 case CM_SIDR_REP_ATTR_ID
:
3077 event
= IB_CM_SIDR_REP_RECEIVED
;
3079 case CM_LAP_ATTR_ID
:
3081 event
= IB_CM_LAP_RECEIVED
;
3083 case CM_APR_ATTR_ID
:
3084 event
= IB_CM_APR_RECEIVED
;
3087 ib_free_recv_mad(mad_recv_wc
);
3091 work
= kmalloc(sizeof *work
+ sizeof(struct ib_sa_path_rec
) * paths
,
3094 ib_free_recv_mad(mad_recv_wc
);
3098 INIT_WORK(&work
->work
, cm_work_handler
, work
);
3099 work
->cm_event
.event
= event
;
3100 work
->mad_recv_wc
= mad_recv_wc
;
3101 work
->port
= (struct cm_port
*)mad_agent
->context
;
3102 queue_work(cm
.wq
, &work
->work
);
3105 static int cm_init_qp_init_attr(struct cm_id_private
*cm_id_priv
,
3106 struct ib_qp_attr
*qp_attr
,
3109 unsigned long flags
;
3112 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3113 switch (cm_id_priv
->id
.state
) {
3114 case IB_CM_REQ_SENT
:
3115 case IB_CM_MRA_REQ_RCVD
:
3116 case IB_CM_REQ_RCVD
:
3117 case IB_CM_MRA_REQ_SENT
:
3118 case IB_CM_REP_RCVD
:
3119 case IB_CM_MRA_REP_SENT
:
3120 case IB_CM_REP_SENT
:
3121 case IB_CM_MRA_REP_RCVD
:
3122 case IB_CM_ESTABLISHED
:
3123 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
|
3124 IB_QP_PKEY_INDEX
| IB_QP_PORT
;
3125 qp_attr
->qp_access_flags
= IB_ACCESS_LOCAL_WRITE
|
3126 IB_ACCESS_REMOTE_WRITE
;
3127 if (cm_id_priv
->responder_resources
)
3128 qp_attr
->qp_access_flags
|= IB_ACCESS_REMOTE_READ
;
3129 qp_attr
->pkey_index
= cm_id_priv
->av
.pkey_index
;
3130 qp_attr
->port_num
= cm_id_priv
->av
.port
->port_num
;
3137 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3141 static int cm_init_qp_rtr_attr(struct cm_id_private
*cm_id_priv
,
3142 struct ib_qp_attr
*qp_attr
,
3145 unsigned long flags
;
3148 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3149 switch (cm_id_priv
->id
.state
) {
3150 case IB_CM_REQ_RCVD
:
3151 case IB_CM_MRA_REQ_SENT
:
3152 case IB_CM_REP_RCVD
:
3153 case IB_CM_MRA_REP_SENT
:
3154 case IB_CM_REP_SENT
:
3155 case IB_CM_MRA_REP_RCVD
:
3156 case IB_CM_ESTABLISHED
:
3157 *qp_attr_mask
= IB_QP_STATE
| IB_QP_AV
| IB_QP_PATH_MTU
|
3158 IB_QP_DEST_QPN
| IB_QP_RQ_PSN
;
3159 qp_attr
->ah_attr
= cm_id_priv
->av
.ah_attr
;
3160 qp_attr
->path_mtu
= cm_id_priv
->path_mtu
;
3161 qp_attr
->dest_qp_num
= be32_to_cpu(cm_id_priv
->remote_qpn
);
3162 qp_attr
->rq_psn
= be32_to_cpu(cm_id_priv
->rq_psn
);
3163 if (cm_id_priv
->qp_type
== IB_QPT_RC
) {
3164 *qp_attr_mask
|= IB_QP_MAX_DEST_RD_ATOMIC
|
3165 IB_QP_MIN_RNR_TIMER
;
3166 qp_attr
->max_dest_rd_atomic
=
3167 cm_id_priv
->responder_resources
;
3168 qp_attr
->min_rnr_timer
= 0;
3170 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3171 *qp_attr_mask
|= IB_QP_ALT_PATH
;
3172 qp_attr
->alt_port_num
= cm_id_priv
->alt_av
.port
->port_num
;
3173 qp_attr
->alt_ah_attr
= cm_id_priv
->alt_av
.ah_attr
;
3181 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3185 static int cm_init_qp_rts_attr(struct cm_id_private
*cm_id_priv
,
3186 struct ib_qp_attr
*qp_attr
,
3189 unsigned long flags
;
3192 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3193 switch (cm_id_priv
->id
.state
) {
3194 case IB_CM_REP_RCVD
:
3195 case IB_CM_MRA_REP_SENT
:
3196 case IB_CM_REP_SENT
:
3197 case IB_CM_MRA_REP_RCVD
:
3198 case IB_CM_ESTABLISHED
:
3199 *qp_attr_mask
= IB_QP_STATE
| IB_QP_SQ_PSN
;
3200 qp_attr
->sq_psn
= be32_to_cpu(cm_id_priv
->sq_psn
);
3201 if (cm_id_priv
->qp_type
== IB_QPT_RC
) {
3202 *qp_attr_mask
|= IB_QP_TIMEOUT
| IB_QP_RETRY_CNT
|
3204 IB_QP_MAX_QP_RD_ATOMIC
;
3205 qp_attr
->timeout
= cm_id_priv
->local_ack_timeout
;
3206 qp_attr
->retry_cnt
= cm_id_priv
->retry_count
;
3207 qp_attr
->rnr_retry
= cm_id_priv
->rnr_retry_count
;
3208 qp_attr
->max_rd_atomic
= cm_id_priv
->initiator_depth
;
3210 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3211 *qp_attr_mask
|= IB_QP_PATH_MIG_STATE
;
3212 qp_attr
->path_mig_state
= IB_MIG_REARM
;
3220 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3224 int ib_cm_init_qp_attr(struct ib_cm_id
*cm_id
,
3225 struct ib_qp_attr
*qp_attr
,
3228 struct cm_id_private
*cm_id_priv
;
3231 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3232 switch (qp_attr
->qp_state
) {
3234 ret
= cm_init_qp_init_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3237 ret
= cm_init_qp_rtr_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3240 ret
= cm_init_qp_rts_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3248 EXPORT_SYMBOL(ib_cm_init_qp_attr
);
3250 static void cm_add_one(struct ib_device
*device
)
3252 struct cm_device
*cm_dev
;
3253 struct cm_port
*port
;
3254 struct ib_mad_reg_req reg_req
= {
3255 .mgmt_class
= IB_MGMT_CLASS_CM
,
3256 .mgmt_class_version
= IB_CM_CLASS_VERSION
3258 struct ib_port_modify port_modify
= {
3259 .set_port_cap_mask
= IB_PORT_CM_SUP
3261 unsigned long flags
;
3265 cm_dev
= kmalloc(sizeof(*cm_dev
) + sizeof(*port
) *
3266 device
->phys_port_cnt
, GFP_KERNEL
);
3270 cm_dev
->device
= device
;
3271 cm_dev
->ca_guid
= device
->node_guid
;
3273 set_bit(IB_MGMT_METHOD_SEND
, reg_req
.method_mask
);
3274 for (i
= 1; i
<= device
->phys_port_cnt
; i
++) {
3275 port
= &cm_dev
->port
[i
-1];
3276 port
->cm_dev
= cm_dev
;
3278 port
->mad_agent
= ib_register_mad_agent(device
, i
,
3285 if (IS_ERR(port
->mad_agent
))
3288 ret
= ib_modify_port(device
, i
, 0, &port_modify
);
3292 ib_set_client_data(device
, &cm_client
, cm_dev
);
3294 write_lock_irqsave(&cm
.device_lock
, flags
);
3295 list_add_tail(&cm_dev
->list
, &cm
.device_list
);
3296 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3300 ib_unregister_mad_agent(port
->mad_agent
);
3302 port_modify
.set_port_cap_mask
= 0;
3303 port_modify
.clr_port_cap_mask
= IB_PORT_CM_SUP
;
3305 port
= &cm_dev
->port
[i
-1];
3306 ib_modify_port(device
, port
->port_num
, 0, &port_modify
);
3307 ib_unregister_mad_agent(port
->mad_agent
);
3312 static void cm_remove_one(struct ib_device
*device
)
3314 struct cm_device
*cm_dev
;
3315 struct cm_port
*port
;
3316 struct ib_port_modify port_modify
= {
3317 .clr_port_cap_mask
= IB_PORT_CM_SUP
3319 unsigned long flags
;
3322 cm_dev
= ib_get_client_data(device
, &cm_client
);
3326 write_lock_irqsave(&cm
.device_lock
, flags
);
3327 list_del(&cm_dev
->list
);
3328 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3330 for (i
= 1; i
<= device
->phys_port_cnt
; i
++) {
3331 port
= &cm_dev
->port
[i
-1];
3332 ib_modify_port(device
, port
->port_num
, 0, &port_modify
);
3333 ib_unregister_mad_agent(port
->mad_agent
);
3338 static int __init
ib_cm_init(void)
3342 memset(&cm
, 0, sizeof cm
);
3343 INIT_LIST_HEAD(&cm
.device_list
);
3344 rwlock_init(&cm
.device_lock
);
3345 spin_lock_init(&cm
.lock
);
3346 cm
.listen_service_table
= RB_ROOT
;
3347 cm
.listen_service_id
= __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID
);
3348 cm
.remote_id_table
= RB_ROOT
;
3349 cm
.remote_qp_table
= RB_ROOT
;
3350 cm
.remote_sidr_table
= RB_ROOT
;
3351 idr_init(&cm
.local_id_table
);
3352 idr_pre_get(&cm
.local_id_table
, GFP_KERNEL
);
3354 cm
.wq
= create_workqueue("ib_cm");
3358 ret
= ib_register_client(&cm_client
);
3364 destroy_workqueue(cm
.wq
);
3368 static void __exit
ib_cm_cleanup(void)
3370 destroy_workqueue(cm
.wq
);
3371 ib_unregister_client(&cm_client
);
3372 idr_destroy(&cm
.local_id_table
);
3375 module_init(ib_cm_init
);
3376 module_exit(ib_cm_cleanup
);