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 void ib_destroy_cm_id(struct ib_cm_id
*cm_id
)
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
,
738 case IB_CM_MRA_REQ_RCVD
:
740 case IB_CM_MRA_REP_RCVD
:
741 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
744 case IB_CM_MRA_REQ_SENT
:
746 case IB_CM_MRA_REP_SENT
:
747 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
748 ib_send_cm_rej(cm_id
, IB_CM_REJ_CONSUMER_DEFINED
,
751 case IB_CM_ESTABLISHED
:
752 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
753 ib_send_cm_dreq(cm_id
, NULL
, 0);
755 case IB_CM_DREQ_SENT
:
756 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
757 cm_enter_timewait(cm_id_priv
);
758 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
760 case IB_CM_DREQ_RCVD
:
761 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
762 ib_send_cm_drep(cm_id
, NULL
, 0);
765 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
769 cm_free_id(cm_id
->local_id
);
770 cm_deref_id(cm_id_priv
);
771 wait_for_completion(&cm_id_priv
->comp
);
772 while ((work
= cm_dequeue_work(cm_id_priv
)) != NULL
)
774 kfree(cm_id_priv
->compare_data
);
775 kfree(cm_id_priv
->private_data
);
778 EXPORT_SYMBOL(ib_destroy_cm_id
);
780 int ib_cm_listen(struct ib_cm_id
*cm_id
, __be64 service_id
, __be64 service_mask
,
781 struct ib_cm_compare_data
*compare_data
)
783 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
787 service_mask
= service_mask
? service_mask
:
788 __constant_cpu_to_be64(~0ULL);
789 service_id
&= service_mask
;
790 if ((service_id
& IB_SERVICE_ID_AGN_MASK
) == IB_CM_ASSIGN_SERVICE_ID
&&
791 (service_id
!= IB_CM_ASSIGN_SERVICE_ID
))
794 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
795 if (cm_id
->state
!= IB_CM_IDLE
)
799 cm_id_priv
->compare_data
= kzalloc(sizeof *compare_data
,
801 if (!cm_id_priv
->compare_data
)
803 cm_mask_copy(cm_id_priv
->compare_data
->data
,
804 compare_data
->data
, compare_data
->mask
);
805 memcpy(cm_id_priv
->compare_data
->mask
, compare_data
->mask
,
809 cm_id
->state
= IB_CM_LISTEN
;
811 spin_lock_irqsave(&cm
.lock
, flags
);
812 if (service_id
== IB_CM_ASSIGN_SERVICE_ID
) {
813 cm_id
->service_id
= cpu_to_be64(cm
.listen_service_id
++);
814 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
816 cm_id
->service_id
= service_id
;
817 cm_id
->service_mask
= service_mask
;
819 cur_cm_id_priv
= cm_insert_listen(cm_id_priv
);
820 spin_unlock_irqrestore(&cm
.lock
, flags
);
822 if (cur_cm_id_priv
) {
823 cm_id
->state
= IB_CM_IDLE
;
824 kfree(cm_id_priv
->compare_data
);
825 cm_id_priv
->compare_data
= NULL
;
830 EXPORT_SYMBOL(ib_cm_listen
);
832 static __be64
cm_form_tid(struct cm_id_private
*cm_id_priv
,
833 enum cm_msg_sequence msg_seq
)
837 hi_tid
= ((u64
) cm_id_priv
->av
.port
->mad_agent
->hi_tid
) << 32;
838 low_tid
= (u64
) ((__force u32
)cm_id_priv
->id
.local_id
|
840 return cpu_to_be64(hi_tid
| low_tid
);
843 static void cm_format_mad_hdr(struct ib_mad_hdr
*hdr
,
844 __be16 attr_id
, __be64 tid
)
846 hdr
->base_version
= IB_MGMT_BASE_VERSION
;
847 hdr
->mgmt_class
= IB_MGMT_CLASS_CM
;
848 hdr
->class_version
= IB_CM_CLASS_VERSION
;
849 hdr
->method
= IB_MGMT_METHOD_SEND
;
850 hdr
->attr_id
= attr_id
;
854 static void cm_format_req(struct cm_req_msg
*req_msg
,
855 struct cm_id_private
*cm_id_priv
,
856 struct ib_cm_req_param
*param
)
858 cm_format_mad_hdr(&req_msg
->hdr
, CM_REQ_ATTR_ID
,
859 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_REQ
));
861 req_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
862 req_msg
->service_id
= param
->service_id
;
863 req_msg
->local_ca_guid
= cm_id_priv
->av
.port
->cm_dev
->ca_guid
;
864 cm_req_set_local_qpn(req_msg
, cpu_to_be32(param
->qp_num
));
865 cm_req_set_resp_res(req_msg
, param
->responder_resources
);
866 cm_req_set_init_depth(req_msg
, param
->initiator_depth
);
867 cm_req_set_remote_resp_timeout(req_msg
,
868 param
->remote_cm_response_timeout
);
869 cm_req_set_qp_type(req_msg
, param
->qp_type
);
870 cm_req_set_flow_ctrl(req_msg
, param
->flow_control
);
871 cm_req_set_starting_psn(req_msg
, cpu_to_be32(param
->starting_psn
));
872 cm_req_set_local_resp_timeout(req_msg
,
873 param
->local_cm_response_timeout
);
874 cm_req_set_retry_count(req_msg
, param
->retry_count
);
875 req_msg
->pkey
= param
->primary_path
->pkey
;
876 cm_req_set_path_mtu(req_msg
, param
->primary_path
->mtu
);
877 cm_req_set_rnr_retry_count(req_msg
, param
->rnr_retry_count
);
878 cm_req_set_max_cm_retries(req_msg
, param
->max_cm_retries
);
879 cm_req_set_srq(req_msg
, param
->srq
);
881 req_msg
->primary_local_lid
= param
->primary_path
->slid
;
882 req_msg
->primary_remote_lid
= param
->primary_path
->dlid
;
883 req_msg
->primary_local_gid
= param
->primary_path
->sgid
;
884 req_msg
->primary_remote_gid
= param
->primary_path
->dgid
;
885 cm_req_set_primary_flow_label(req_msg
, param
->primary_path
->flow_label
);
886 cm_req_set_primary_packet_rate(req_msg
, param
->primary_path
->rate
);
887 req_msg
->primary_traffic_class
= param
->primary_path
->traffic_class
;
888 req_msg
->primary_hop_limit
= param
->primary_path
->hop_limit
;
889 cm_req_set_primary_sl(req_msg
, param
->primary_path
->sl
);
890 cm_req_set_primary_subnet_local(req_msg
, 1); /* local only... */
891 cm_req_set_primary_local_ack_timeout(req_msg
,
892 min(31, param
->primary_path
->packet_life_time
+ 1));
894 if (param
->alternate_path
) {
895 req_msg
->alt_local_lid
= param
->alternate_path
->slid
;
896 req_msg
->alt_remote_lid
= param
->alternate_path
->dlid
;
897 req_msg
->alt_local_gid
= param
->alternate_path
->sgid
;
898 req_msg
->alt_remote_gid
= param
->alternate_path
->dgid
;
899 cm_req_set_alt_flow_label(req_msg
,
900 param
->alternate_path
->flow_label
);
901 cm_req_set_alt_packet_rate(req_msg
, param
->alternate_path
->rate
);
902 req_msg
->alt_traffic_class
= param
->alternate_path
->traffic_class
;
903 req_msg
->alt_hop_limit
= param
->alternate_path
->hop_limit
;
904 cm_req_set_alt_sl(req_msg
, param
->alternate_path
->sl
);
905 cm_req_set_alt_subnet_local(req_msg
, 1); /* local only... */
906 cm_req_set_alt_local_ack_timeout(req_msg
,
907 min(31, param
->alternate_path
->packet_life_time
+ 1));
910 if (param
->private_data
&& param
->private_data_len
)
911 memcpy(req_msg
->private_data
, param
->private_data
,
912 param
->private_data_len
);
915 static int cm_validate_req_param(struct ib_cm_req_param
*param
)
917 /* peer-to-peer not supported */
918 if (param
->peer_to_peer
)
921 if (!param
->primary_path
)
924 if (param
->qp_type
!= IB_QPT_RC
&& param
->qp_type
!= IB_QPT_UC
)
927 if (param
->private_data
&&
928 param
->private_data_len
> IB_CM_REQ_PRIVATE_DATA_SIZE
)
931 if (param
->alternate_path
&&
932 (param
->alternate_path
->pkey
!= param
->primary_path
->pkey
||
933 param
->alternate_path
->mtu
!= param
->primary_path
->mtu
))
939 int ib_send_cm_req(struct ib_cm_id
*cm_id
,
940 struct ib_cm_req_param
*param
)
942 struct cm_id_private
*cm_id_priv
;
943 struct cm_req_msg
*req_msg
;
947 ret
= cm_validate_req_param(param
);
951 /* Verify that we're not in timewait. */
952 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
953 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
954 if (cm_id
->state
!= IB_CM_IDLE
) {
955 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
959 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
961 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
963 if (IS_ERR(cm_id_priv
->timewait_info
))
966 ret
= cm_init_av_by_path(param
->primary_path
, &cm_id_priv
->av
);
969 if (param
->alternate_path
) {
970 ret
= cm_init_av_by_path(param
->alternate_path
,
971 &cm_id_priv
->alt_av
);
975 cm_id
->service_id
= param
->service_id
;
976 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
977 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
978 param
->primary_path
->packet_life_time
) * 2 +
980 param
->remote_cm_response_timeout
);
981 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
982 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
983 cm_id_priv
->responder_resources
= param
->responder_resources
;
984 cm_id_priv
->retry_count
= param
->retry_count
;
985 cm_id_priv
->path_mtu
= param
->primary_path
->mtu
;
986 cm_id_priv
->qp_type
= param
->qp_type
;
988 ret
= cm_alloc_msg(cm_id_priv
, &cm_id_priv
->msg
);
992 req_msg
= (struct cm_req_msg
*) cm_id_priv
->msg
->mad
;
993 cm_format_req(req_msg
, cm_id_priv
, param
);
994 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
995 cm_id_priv
->msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
996 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long) IB_CM_REQ_SENT
;
998 cm_id_priv
->local_qpn
= cm_req_get_local_qpn(req_msg
);
999 cm_id_priv
->rq_psn
= cm_req_get_starting_psn(req_msg
);
1000 cm_id_priv
->local_ack_timeout
=
1001 cm_req_get_primary_local_ack_timeout(req_msg
);
1003 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1004 ret
= ib_post_send_mad(cm_id_priv
->msg
, NULL
);
1006 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1009 BUG_ON(cm_id
->state
!= IB_CM_IDLE
);
1010 cm_id
->state
= IB_CM_REQ_SENT
;
1011 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1014 error2
: cm_free_msg(cm_id_priv
->msg
);
1015 error1
: kfree(cm_id_priv
->timewait_info
);
1018 EXPORT_SYMBOL(ib_send_cm_req
);
1020 static int cm_issue_rej(struct cm_port
*port
,
1021 struct ib_mad_recv_wc
*mad_recv_wc
,
1022 enum ib_cm_rej_reason reason
,
1023 enum cm_msg_response msg_rejected
,
1024 void *ari
, u8 ari_length
)
1026 struct ib_mad_send_buf
*msg
= NULL
;
1027 struct cm_rej_msg
*rej_msg
, *rcv_msg
;
1030 ret
= cm_alloc_response_msg(port
, mad_recv_wc
, &msg
);
1034 /* We just need common CM header information. Cast to any message. */
1035 rcv_msg
= (struct cm_rej_msg
*) mad_recv_wc
->recv_buf
.mad
;
1036 rej_msg
= (struct cm_rej_msg
*) msg
->mad
;
1038 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, rcv_msg
->hdr
.tid
);
1039 rej_msg
->remote_comm_id
= rcv_msg
->local_comm_id
;
1040 rej_msg
->local_comm_id
= rcv_msg
->remote_comm_id
;
1041 cm_rej_set_msg_rejected(rej_msg
, msg_rejected
);
1042 rej_msg
->reason
= cpu_to_be16(reason
);
1044 if (ari
&& ari_length
) {
1045 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1046 memcpy(rej_msg
->ari
, ari
, ari_length
);
1049 ret
= ib_post_send_mad(msg
, NULL
);
1056 static inline int cm_is_active_peer(__be64 local_ca_guid
, __be64 remote_ca_guid
,
1057 __be32 local_qpn
, __be32 remote_qpn
)
1059 return (be64_to_cpu(local_ca_guid
) > be64_to_cpu(remote_ca_guid
) ||
1060 ((local_ca_guid
== remote_ca_guid
) &&
1061 (be32_to_cpu(local_qpn
) > be32_to_cpu(remote_qpn
))));
1064 static void cm_format_paths_from_req(struct cm_req_msg
*req_msg
,
1065 struct ib_sa_path_rec
*primary_path
,
1066 struct ib_sa_path_rec
*alt_path
)
1068 memset(primary_path
, 0, sizeof *primary_path
);
1069 primary_path
->dgid
= req_msg
->primary_local_gid
;
1070 primary_path
->sgid
= req_msg
->primary_remote_gid
;
1071 primary_path
->dlid
= req_msg
->primary_local_lid
;
1072 primary_path
->slid
= req_msg
->primary_remote_lid
;
1073 primary_path
->flow_label
= cm_req_get_primary_flow_label(req_msg
);
1074 primary_path
->hop_limit
= req_msg
->primary_hop_limit
;
1075 primary_path
->traffic_class
= req_msg
->primary_traffic_class
;
1076 primary_path
->reversible
= 1;
1077 primary_path
->pkey
= req_msg
->pkey
;
1078 primary_path
->sl
= cm_req_get_primary_sl(req_msg
);
1079 primary_path
->mtu_selector
= IB_SA_EQ
;
1080 primary_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1081 primary_path
->rate_selector
= IB_SA_EQ
;
1082 primary_path
->rate
= cm_req_get_primary_packet_rate(req_msg
);
1083 primary_path
->packet_life_time_selector
= IB_SA_EQ
;
1084 primary_path
->packet_life_time
=
1085 cm_req_get_primary_local_ack_timeout(req_msg
);
1086 primary_path
->packet_life_time
-= (primary_path
->packet_life_time
> 0);
1088 if (req_msg
->alt_local_lid
) {
1089 memset(alt_path
, 0, sizeof *alt_path
);
1090 alt_path
->dgid
= req_msg
->alt_local_gid
;
1091 alt_path
->sgid
= req_msg
->alt_remote_gid
;
1092 alt_path
->dlid
= req_msg
->alt_local_lid
;
1093 alt_path
->slid
= req_msg
->alt_remote_lid
;
1094 alt_path
->flow_label
= cm_req_get_alt_flow_label(req_msg
);
1095 alt_path
->hop_limit
= req_msg
->alt_hop_limit
;
1096 alt_path
->traffic_class
= req_msg
->alt_traffic_class
;
1097 alt_path
->reversible
= 1;
1098 alt_path
->pkey
= req_msg
->pkey
;
1099 alt_path
->sl
= cm_req_get_alt_sl(req_msg
);
1100 alt_path
->mtu_selector
= IB_SA_EQ
;
1101 alt_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1102 alt_path
->rate_selector
= IB_SA_EQ
;
1103 alt_path
->rate
= cm_req_get_alt_packet_rate(req_msg
);
1104 alt_path
->packet_life_time_selector
= IB_SA_EQ
;
1105 alt_path
->packet_life_time
=
1106 cm_req_get_alt_local_ack_timeout(req_msg
);
1107 alt_path
->packet_life_time
-= (alt_path
->packet_life_time
> 0);
1111 static void cm_format_req_event(struct cm_work
*work
,
1112 struct cm_id_private
*cm_id_priv
,
1113 struct ib_cm_id
*listen_id
)
1115 struct cm_req_msg
*req_msg
;
1116 struct ib_cm_req_event_param
*param
;
1118 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1119 param
= &work
->cm_event
.param
.req_rcvd
;
1120 param
->listen_id
= listen_id
;
1121 param
->port
= cm_id_priv
->av
.port
->port_num
;
1122 param
->primary_path
= &work
->path
[0];
1123 if (req_msg
->alt_local_lid
)
1124 param
->alternate_path
= &work
->path
[1];
1126 param
->alternate_path
= NULL
;
1127 param
->remote_ca_guid
= req_msg
->local_ca_guid
;
1128 param
->remote_qkey
= be32_to_cpu(req_msg
->local_qkey
);
1129 param
->remote_qpn
= be32_to_cpu(cm_req_get_local_qpn(req_msg
));
1130 param
->qp_type
= cm_req_get_qp_type(req_msg
);
1131 param
->starting_psn
= be32_to_cpu(cm_req_get_starting_psn(req_msg
));
1132 param
->responder_resources
= cm_req_get_init_depth(req_msg
);
1133 param
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1134 param
->local_cm_response_timeout
=
1135 cm_req_get_remote_resp_timeout(req_msg
);
1136 param
->flow_control
= cm_req_get_flow_ctrl(req_msg
);
1137 param
->remote_cm_response_timeout
=
1138 cm_req_get_local_resp_timeout(req_msg
);
1139 param
->retry_count
= cm_req_get_retry_count(req_msg
);
1140 param
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1141 param
->srq
= cm_req_get_srq(req_msg
);
1142 work
->cm_event
.private_data
= &req_msg
->private_data
;
1145 static void cm_process_work(struct cm_id_private
*cm_id_priv
,
1146 struct cm_work
*work
)
1148 unsigned long flags
;
1151 /* We will typically only have the current event to report. */
1152 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &work
->cm_event
);
1155 while (!ret
&& !atomic_add_negative(-1, &cm_id_priv
->work_count
)) {
1156 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1157 work
= cm_dequeue_work(cm_id_priv
);
1158 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1160 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
,
1164 cm_deref_id(cm_id_priv
);
1166 ib_destroy_cm_id(&cm_id_priv
->id
);
1169 static void cm_format_mra(struct cm_mra_msg
*mra_msg
,
1170 struct cm_id_private
*cm_id_priv
,
1171 enum cm_msg_response msg_mraed
, u8 service_timeout
,
1172 const void *private_data
, u8 private_data_len
)
1174 cm_format_mad_hdr(&mra_msg
->hdr
, CM_MRA_ATTR_ID
, cm_id_priv
->tid
);
1175 cm_mra_set_msg_mraed(mra_msg
, msg_mraed
);
1176 mra_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1177 mra_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1178 cm_mra_set_service_timeout(mra_msg
, service_timeout
);
1180 if (private_data
&& private_data_len
)
1181 memcpy(mra_msg
->private_data
, private_data
, private_data_len
);
1184 static void cm_format_rej(struct cm_rej_msg
*rej_msg
,
1185 struct cm_id_private
*cm_id_priv
,
1186 enum ib_cm_rej_reason reason
,
1189 const void *private_data
,
1190 u8 private_data_len
)
1192 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, cm_id_priv
->tid
);
1193 rej_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1195 switch(cm_id_priv
->id
.state
) {
1196 case IB_CM_REQ_RCVD
:
1197 rej_msg
->local_comm_id
= 0;
1198 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1200 case IB_CM_MRA_REQ_SENT
:
1201 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1202 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1204 case IB_CM_REP_RCVD
:
1205 case IB_CM_MRA_REP_SENT
:
1206 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1207 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REP
);
1210 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1211 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_OTHER
);
1215 rej_msg
->reason
= cpu_to_be16(reason
);
1216 if (ari
&& ari_length
) {
1217 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1218 memcpy(rej_msg
->ari
, ari
, ari_length
);
1221 if (private_data
&& private_data_len
)
1222 memcpy(rej_msg
->private_data
, private_data
, private_data_len
);
1225 static void cm_dup_req_handler(struct cm_work
*work
,
1226 struct cm_id_private
*cm_id_priv
)
1228 struct ib_mad_send_buf
*msg
= NULL
;
1229 unsigned long flags
;
1232 /* Quick state check to discard duplicate REQs. */
1233 if (cm_id_priv
->id
.state
== IB_CM_REQ_RCVD
)
1236 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1240 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1241 switch (cm_id_priv
->id
.state
) {
1242 case IB_CM_MRA_REQ_SENT
:
1243 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1244 CM_MSG_RESPONSE_REQ
, cm_id_priv
->service_timeout
,
1245 cm_id_priv
->private_data
,
1246 cm_id_priv
->private_data_len
);
1248 case IB_CM_TIMEWAIT
:
1249 cm_format_rej((struct cm_rej_msg
*) msg
->mad
, cm_id_priv
,
1250 IB_CM_REJ_STALE_CONN
, NULL
, 0, NULL
, 0);
1255 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1257 ret
= ib_post_send_mad(msg
, NULL
);
1262 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1263 free
: cm_free_msg(msg
);
1266 static struct cm_id_private
* cm_match_req(struct cm_work
*work
,
1267 struct cm_id_private
*cm_id_priv
)
1269 struct cm_id_private
*listen_cm_id_priv
, *cur_cm_id_priv
;
1270 struct cm_timewait_info
*timewait_info
;
1271 struct cm_req_msg
*req_msg
;
1272 unsigned long flags
;
1274 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1276 /* Check for duplicate REQ and stale connections. */
1277 spin_lock_irqsave(&cm
.lock
, flags
);
1278 timewait_info
= cm_insert_remote_id(cm_id_priv
->timewait_info
);
1280 timewait_info
= cm_insert_remote_qpn(cm_id_priv
->timewait_info
);
1282 if (timewait_info
) {
1283 cur_cm_id_priv
= cm_get_id(timewait_info
->work
.local_id
,
1284 timewait_info
->work
.remote_id
);
1285 spin_unlock_irqrestore(&cm
.lock
, flags
);
1286 if (cur_cm_id_priv
) {
1287 cm_dup_req_handler(work
, cur_cm_id_priv
);
1288 cm_deref_id(cur_cm_id_priv
);
1290 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1291 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REQ
,
1296 /* Find matching listen request. */
1297 listen_cm_id_priv
= cm_find_listen(cm_id_priv
->id
.device
,
1298 req_msg
->service_id
,
1299 req_msg
->private_data
);
1300 if (!listen_cm_id_priv
) {
1301 spin_unlock_irqrestore(&cm
.lock
, flags
);
1302 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1303 IB_CM_REJ_INVALID_SERVICE_ID
, CM_MSG_RESPONSE_REQ
,
1307 atomic_inc(&listen_cm_id_priv
->refcount
);
1308 atomic_inc(&cm_id_priv
->refcount
);
1309 cm_id_priv
->id
.state
= IB_CM_REQ_RCVD
;
1310 atomic_inc(&cm_id_priv
->work_count
);
1311 spin_unlock_irqrestore(&cm
.lock
, flags
);
1312 return listen_cm_id_priv
;
1314 error
: cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1318 static int cm_req_handler(struct cm_work
*work
)
1320 struct ib_cm_id
*cm_id
;
1321 struct cm_id_private
*cm_id_priv
, *listen_cm_id_priv
;
1322 struct cm_req_msg
*req_msg
;
1325 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1327 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->device
, NULL
, NULL
);
1329 return PTR_ERR(cm_id
);
1331 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1332 cm_id_priv
->id
.remote_id
= req_msg
->local_comm_id
;
1333 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
1334 work
->mad_recv_wc
->recv_buf
.grh
,
1336 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
1338 if (IS_ERR(cm_id_priv
->timewait_info
)) {
1339 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
1342 cm_id_priv
->timewait_info
->work
.remote_id
= req_msg
->local_comm_id
;
1343 cm_id_priv
->timewait_info
->remote_ca_guid
= req_msg
->local_ca_guid
;
1344 cm_id_priv
->timewait_info
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1346 listen_cm_id_priv
= cm_match_req(work
, cm_id_priv
);
1347 if (!listen_cm_id_priv
) {
1352 cm_id_priv
->id
.cm_handler
= listen_cm_id_priv
->id
.cm_handler
;
1353 cm_id_priv
->id
.context
= listen_cm_id_priv
->id
.context
;
1354 cm_id_priv
->id
.service_id
= req_msg
->service_id
;
1355 cm_id_priv
->id
.service_mask
= __constant_cpu_to_be64(~0ULL);
1357 cm_format_paths_from_req(req_msg
, &work
->path
[0], &work
->path
[1]);
1358 ret
= cm_init_av_by_path(&work
->path
[0], &cm_id_priv
->av
);
1361 if (req_msg
->alt_local_lid
) {
1362 ret
= cm_init_av_by_path(&work
->path
[1], &cm_id_priv
->alt_av
);
1366 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1367 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1368 cm_req_get_local_resp_timeout(req_msg
));
1369 cm_id_priv
->max_cm_retries
= cm_req_get_max_cm_retries(req_msg
);
1370 cm_id_priv
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1371 cm_id_priv
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1372 cm_id_priv
->responder_resources
= cm_req_get_init_depth(req_msg
);
1373 cm_id_priv
->path_mtu
= cm_req_get_path_mtu(req_msg
);
1374 cm_id_priv
->sq_psn
= cm_req_get_starting_psn(req_msg
);
1375 cm_id_priv
->local_ack_timeout
=
1376 cm_req_get_primary_local_ack_timeout(req_msg
);
1377 cm_id_priv
->retry_count
= cm_req_get_retry_count(req_msg
);
1378 cm_id_priv
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1379 cm_id_priv
->qp_type
= cm_req_get_qp_type(req_msg
);
1381 cm_format_req_event(work
, cm_id_priv
, &listen_cm_id_priv
->id
);
1382 cm_process_work(cm_id_priv
, work
);
1383 cm_deref_id(listen_cm_id_priv
);
1386 error3
: atomic_dec(&cm_id_priv
->refcount
);
1387 cm_deref_id(listen_cm_id_priv
);
1388 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1389 error2
: kfree(cm_id_priv
->timewait_info
);
1390 cm_id_priv
->timewait_info
= NULL
;
1391 error1
: ib_destroy_cm_id(&cm_id_priv
->id
);
1395 static void cm_format_rep(struct cm_rep_msg
*rep_msg
,
1396 struct cm_id_private
*cm_id_priv
,
1397 struct ib_cm_rep_param
*param
)
1399 cm_format_mad_hdr(&rep_msg
->hdr
, CM_REP_ATTR_ID
, cm_id_priv
->tid
);
1400 rep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1401 rep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1402 cm_rep_set_local_qpn(rep_msg
, cpu_to_be32(param
->qp_num
));
1403 cm_rep_set_starting_psn(rep_msg
, cpu_to_be32(param
->starting_psn
));
1404 rep_msg
->resp_resources
= param
->responder_resources
;
1405 rep_msg
->initiator_depth
= param
->initiator_depth
;
1406 cm_rep_set_target_ack_delay(rep_msg
, param
->target_ack_delay
);
1407 cm_rep_set_failover(rep_msg
, param
->failover_accepted
);
1408 cm_rep_set_flow_ctrl(rep_msg
, param
->flow_control
);
1409 cm_rep_set_rnr_retry_count(rep_msg
, param
->rnr_retry_count
);
1410 cm_rep_set_srq(rep_msg
, param
->srq
);
1411 rep_msg
->local_ca_guid
= cm_id_priv
->av
.port
->cm_dev
->ca_guid
;
1413 if (param
->private_data
&& param
->private_data_len
)
1414 memcpy(rep_msg
->private_data
, param
->private_data
,
1415 param
->private_data_len
);
1418 int ib_send_cm_rep(struct ib_cm_id
*cm_id
,
1419 struct ib_cm_rep_param
*param
)
1421 struct cm_id_private
*cm_id_priv
;
1422 struct ib_mad_send_buf
*msg
;
1423 struct cm_rep_msg
*rep_msg
;
1424 unsigned long flags
;
1427 if (param
->private_data
&&
1428 param
->private_data_len
> IB_CM_REP_PRIVATE_DATA_SIZE
)
1431 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1432 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1433 if (cm_id
->state
!= IB_CM_REQ_RCVD
&&
1434 cm_id
->state
!= IB_CM_MRA_REQ_SENT
) {
1439 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1443 rep_msg
= (struct cm_rep_msg
*) msg
->mad
;
1444 cm_format_rep(rep_msg
, cm_id_priv
, param
);
1445 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1446 msg
->context
[1] = (void *) (unsigned long) IB_CM_REP_SENT
;
1448 ret
= ib_post_send_mad(msg
, NULL
);
1450 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1455 cm_id
->state
= IB_CM_REP_SENT
;
1456 cm_id_priv
->msg
= msg
;
1457 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1458 cm_id_priv
->responder_resources
= param
->responder_resources
;
1459 cm_id_priv
->rq_psn
= cm_rep_get_starting_psn(rep_msg
);
1460 cm_id_priv
->local_qpn
= cm_rep_get_local_qpn(rep_msg
);
1462 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1465 EXPORT_SYMBOL(ib_send_cm_rep
);
1467 static void cm_format_rtu(struct cm_rtu_msg
*rtu_msg
,
1468 struct cm_id_private
*cm_id_priv
,
1469 const void *private_data
,
1470 u8 private_data_len
)
1472 cm_format_mad_hdr(&rtu_msg
->hdr
, CM_RTU_ATTR_ID
, cm_id_priv
->tid
);
1473 rtu_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1474 rtu_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1476 if (private_data
&& private_data_len
)
1477 memcpy(rtu_msg
->private_data
, private_data
, private_data_len
);
1480 int ib_send_cm_rtu(struct ib_cm_id
*cm_id
,
1481 const void *private_data
,
1482 u8 private_data_len
)
1484 struct cm_id_private
*cm_id_priv
;
1485 struct ib_mad_send_buf
*msg
;
1486 unsigned long flags
;
1490 if (private_data
&& private_data_len
> IB_CM_RTU_PRIVATE_DATA_SIZE
)
1493 data
= cm_copy_private_data(private_data
, private_data_len
);
1495 return PTR_ERR(data
);
1497 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1498 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1499 if (cm_id
->state
!= IB_CM_REP_RCVD
&&
1500 cm_id
->state
!= IB_CM_MRA_REP_SENT
) {
1505 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1509 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1510 private_data
, private_data_len
);
1512 ret
= ib_post_send_mad(msg
, NULL
);
1514 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1520 cm_id
->state
= IB_CM_ESTABLISHED
;
1521 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1522 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1525 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1529 EXPORT_SYMBOL(ib_send_cm_rtu
);
1531 static void cm_format_rep_event(struct cm_work
*work
)
1533 struct cm_rep_msg
*rep_msg
;
1534 struct ib_cm_rep_event_param
*param
;
1536 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1537 param
= &work
->cm_event
.param
.rep_rcvd
;
1538 param
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1539 param
->remote_qkey
= be32_to_cpu(rep_msg
->local_qkey
);
1540 param
->remote_qpn
= be32_to_cpu(cm_rep_get_local_qpn(rep_msg
));
1541 param
->starting_psn
= be32_to_cpu(cm_rep_get_starting_psn(rep_msg
));
1542 param
->responder_resources
= rep_msg
->initiator_depth
;
1543 param
->initiator_depth
= rep_msg
->resp_resources
;
1544 param
->target_ack_delay
= cm_rep_get_target_ack_delay(rep_msg
);
1545 param
->failover_accepted
= cm_rep_get_failover(rep_msg
);
1546 param
->flow_control
= cm_rep_get_flow_ctrl(rep_msg
);
1547 param
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1548 param
->srq
= cm_rep_get_srq(rep_msg
);
1549 work
->cm_event
.private_data
= &rep_msg
->private_data
;
1552 static void cm_dup_rep_handler(struct cm_work
*work
)
1554 struct cm_id_private
*cm_id_priv
;
1555 struct cm_rep_msg
*rep_msg
;
1556 struct ib_mad_send_buf
*msg
= NULL
;
1557 unsigned long flags
;
1560 rep_msg
= (struct cm_rep_msg
*) work
->mad_recv_wc
->recv_buf
.mad
;
1561 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
,
1562 rep_msg
->local_comm_id
);
1566 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1570 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1571 if (cm_id_priv
->id
.state
== IB_CM_ESTABLISHED
)
1572 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1573 cm_id_priv
->private_data
,
1574 cm_id_priv
->private_data_len
);
1575 else if (cm_id_priv
->id
.state
== IB_CM_MRA_REP_SENT
)
1576 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1577 CM_MSG_RESPONSE_REP
, cm_id_priv
->service_timeout
,
1578 cm_id_priv
->private_data
,
1579 cm_id_priv
->private_data_len
);
1582 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1584 ret
= ib_post_send_mad(msg
, NULL
);
1589 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1590 free
: cm_free_msg(msg
);
1591 deref
: cm_deref_id(cm_id_priv
);
1594 static int cm_rep_handler(struct cm_work
*work
)
1596 struct cm_id_private
*cm_id_priv
;
1597 struct cm_rep_msg
*rep_msg
;
1598 unsigned long flags
;
1601 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1602 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
, 0);
1604 cm_dup_rep_handler(work
);
1608 cm_format_rep_event(work
);
1610 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1611 switch (cm_id_priv
->id
.state
) {
1612 case IB_CM_REQ_SENT
:
1613 case IB_CM_MRA_REQ_RCVD
:
1616 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1621 cm_id_priv
->timewait_info
->work
.remote_id
= rep_msg
->local_comm_id
;
1622 cm_id_priv
->timewait_info
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1623 cm_id_priv
->timewait_info
->remote_qpn
= cm_rep_get_local_qpn(rep_msg
);
1625 spin_lock(&cm
.lock
);
1626 /* Check for duplicate REP. */
1627 if (cm_insert_remote_id(cm_id_priv
->timewait_info
)) {
1628 spin_unlock(&cm
.lock
);
1629 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1633 /* Check for a stale connection. */
1634 if (cm_insert_remote_qpn(cm_id_priv
->timewait_info
)) {
1635 rb_erase(&cm_id_priv
->timewait_info
->remote_id_node
,
1636 &cm
.remote_id_table
);
1637 cm_id_priv
->timewait_info
->inserted_remote_id
= 0;
1638 spin_unlock(&cm
.lock
);
1639 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1640 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1641 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REP
,
1646 spin_unlock(&cm
.lock
);
1648 cm_id_priv
->id
.state
= IB_CM_REP_RCVD
;
1649 cm_id_priv
->id
.remote_id
= rep_msg
->local_comm_id
;
1650 cm_id_priv
->remote_qpn
= cm_rep_get_local_qpn(rep_msg
);
1651 cm_id_priv
->initiator_depth
= rep_msg
->resp_resources
;
1652 cm_id_priv
->responder_resources
= rep_msg
->initiator_depth
;
1653 cm_id_priv
->sq_psn
= cm_rep_get_starting_psn(rep_msg
);
1654 cm_id_priv
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1656 /* todo: handle peer_to_peer */
1658 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1659 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1661 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1662 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1665 cm_process_work(cm_id_priv
, work
);
1667 cm_deref_id(cm_id_priv
);
1671 cm_deref_id(cm_id_priv
);
1675 static int cm_establish_handler(struct cm_work
*work
)
1677 struct cm_id_private
*cm_id_priv
;
1678 unsigned long flags
;
1681 /* See comment in ib_cm_establish about lookup. */
1682 cm_id_priv
= cm_acquire_id(work
->local_id
, work
->remote_id
);
1686 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1687 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
) {
1688 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1692 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1693 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1695 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1696 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1699 cm_process_work(cm_id_priv
, work
);
1701 cm_deref_id(cm_id_priv
);
1704 cm_deref_id(cm_id_priv
);
1708 static int cm_rtu_handler(struct cm_work
*work
)
1710 struct cm_id_private
*cm_id_priv
;
1711 struct cm_rtu_msg
*rtu_msg
;
1712 unsigned long flags
;
1715 rtu_msg
= (struct cm_rtu_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1716 cm_id_priv
= cm_acquire_id(rtu_msg
->remote_comm_id
,
1717 rtu_msg
->local_comm_id
);
1721 work
->cm_event
.private_data
= &rtu_msg
->private_data
;
1723 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1724 if (cm_id_priv
->id
.state
!= IB_CM_REP_SENT
&&
1725 cm_id_priv
->id
.state
!= IB_CM_MRA_REP_RCVD
) {
1726 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1729 cm_id_priv
->id
.state
= IB_CM_ESTABLISHED
;
1731 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1732 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1734 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1735 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1738 cm_process_work(cm_id_priv
, work
);
1740 cm_deref_id(cm_id_priv
);
1743 cm_deref_id(cm_id_priv
);
1747 static void cm_format_dreq(struct cm_dreq_msg
*dreq_msg
,
1748 struct cm_id_private
*cm_id_priv
,
1749 const void *private_data
,
1750 u8 private_data_len
)
1752 cm_format_mad_hdr(&dreq_msg
->hdr
, CM_DREQ_ATTR_ID
,
1753 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_DREQ
));
1754 dreq_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1755 dreq_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1756 cm_dreq_set_remote_qpn(dreq_msg
, cm_id_priv
->remote_qpn
);
1758 if (private_data
&& private_data_len
)
1759 memcpy(dreq_msg
->private_data
, private_data
, private_data_len
);
1762 int ib_send_cm_dreq(struct ib_cm_id
*cm_id
,
1763 const void *private_data
,
1764 u8 private_data_len
)
1766 struct cm_id_private
*cm_id_priv
;
1767 struct ib_mad_send_buf
*msg
;
1768 unsigned long flags
;
1771 if (private_data
&& private_data_len
> IB_CM_DREQ_PRIVATE_DATA_SIZE
)
1774 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1775 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1776 if (cm_id
->state
!= IB_CM_ESTABLISHED
) {
1781 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1783 cm_enter_timewait(cm_id_priv
);
1787 cm_format_dreq((struct cm_dreq_msg
*) msg
->mad
, cm_id_priv
,
1788 private_data
, private_data_len
);
1789 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1790 msg
->context
[1] = (void *) (unsigned long) IB_CM_DREQ_SENT
;
1792 ret
= ib_post_send_mad(msg
, NULL
);
1794 cm_enter_timewait(cm_id_priv
);
1795 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1800 cm_id
->state
= IB_CM_DREQ_SENT
;
1801 cm_id_priv
->msg
= msg
;
1802 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1805 EXPORT_SYMBOL(ib_send_cm_dreq
);
1807 static void cm_format_drep(struct cm_drep_msg
*drep_msg
,
1808 struct cm_id_private
*cm_id_priv
,
1809 const void *private_data
,
1810 u8 private_data_len
)
1812 cm_format_mad_hdr(&drep_msg
->hdr
, CM_DREP_ATTR_ID
, cm_id_priv
->tid
);
1813 drep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1814 drep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1816 if (private_data
&& private_data_len
)
1817 memcpy(drep_msg
->private_data
, private_data
, private_data_len
);
1820 int ib_send_cm_drep(struct ib_cm_id
*cm_id
,
1821 const void *private_data
,
1822 u8 private_data_len
)
1824 struct cm_id_private
*cm_id_priv
;
1825 struct ib_mad_send_buf
*msg
;
1826 unsigned long flags
;
1830 if (private_data
&& private_data_len
> IB_CM_DREP_PRIVATE_DATA_SIZE
)
1833 data
= cm_copy_private_data(private_data
, private_data_len
);
1835 return PTR_ERR(data
);
1837 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1838 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1839 if (cm_id
->state
!= IB_CM_DREQ_RCVD
) {
1840 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1845 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1846 cm_enter_timewait(cm_id_priv
);
1848 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1852 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
1853 private_data
, private_data_len
);
1855 ret
= ib_post_send_mad(msg
, NULL
);
1857 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1862 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1865 EXPORT_SYMBOL(ib_send_cm_drep
);
1867 static int cm_dreq_handler(struct cm_work
*work
)
1869 struct cm_id_private
*cm_id_priv
;
1870 struct cm_dreq_msg
*dreq_msg
;
1871 struct ib_mad_send_buf
*msg
= NULL
;
1872 unsigned long flags
;
1875 dreq_msg
= (struct cm_dreq_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1876 cm_id_priv
= cm_acquire_id(dreq_msg
->remote_comm_id
,
1877 dreq_msg
->local_comm_id
);
1881 work
->cm_event
.private_data
= &dreq_msg
->private_data
;
1883 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1884 if (cm_id_priv
->local_qpn
!= cm_dreq_get_remote_qpn(dreq_msg
))
1887 switch (cm_id_priv
->id
.state
) {
1888 case IB_CM_REP_SENT
:
1889 case IB_CM_DREQ_SENT
:
1890 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1892 case IB_CM_ESTABLISHED
:
1893 case IB_CM_MRA_REP_RCVD
:
1895 case IB_CM_TIMEWAIT
:
1896 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
1899 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
1900 cm_id_priv
->private_data
,
1901 cm_id_priv
->private_data_len
);
1902 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1904 if (ib_post_send_mad(msg
, NULL
))
1910 cm_id_priv
->id
.state
= IB_CM_DREQ_RCVD
;
1911 cm_id_priv
->tid
= dreq_msg
->hdr
.tid
;
1912 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1914 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1915 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1918 cm_process_work(cm_id_priv
, work
);
1920 cm_deref_id(cm_id_priv
);
1923 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1924 deref
: cm_deref_id(cm_id_priv
);
1928 static int cm_drep_handler(struct cm_work
*work
)
1930 struct cm_id_private
*cm_id_priv
;
1931 struct cm_drep_msg
*drep_msg
;
1932 unsigned long flags
;
1935 drep_msg
= (struct cm_drep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1936 cm_id_priv
= cm_acquire_id(drep_msg
->remote_comm_id
,
1937 drep_msg
->local_comm_id
);
1941 work
->cm_event
.private_data
= &drep_msg
->private_data
;
1943 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1944 if (cm_id_priv
->id
.state
!= IB_CM_DREQ_SENT
&&
1945 cm_id_priv
->id
.state
!= IB_CM_DREQ_RCVD
) {
1946 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1949 cm_enter_timewait(cm_id_priv
);
1951 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1952 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1954 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1955 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1958 cm_process_work(cm_id_priv
, work
);
1960 cm_deref_id(cm_id_priv
);
1963 cm_deref_id(cm_id_priv
);
1967 int ib_send_cm_rej(struct ib_cm_id
*cm_id
,
1968 enum ib_cm_rej_reason reason
,
1971 const void *private_data
,
1972 u8 private_data_len
)
1974 struct cm_id_private
*cm_id_priv
;
1975 struct ib_mad_send_buf
*msg
;
1976 unsigned long flags
;
1979 if ((private_data
&& private_data_len
> IB_CM_REJ_PRIVATE_DATA_SIZE
) ||
1980 (ari
&& ari_length
> IB_CM_REJ_ARI_LENGTH
))
1983 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1985 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1986 switch (cm_id
->state
) {
1987 case IB_CM_REQ_SENT
:
1988 case IB_CM_MRA_REQ_RCVD
:
1989 case IB_CM_REQ_RCVD
:
1990 case IB_CM_MRA_REQ_SENT
:
1991 case IB_CM_REP_RCVD
:
1992 case IB_CM_MRA_REP_SENT
:
1993 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1995 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
1996 cm_id_priv
, reason
, ari
, ari_length
,
1997 private_data
, private_data_len
);
1999 cm_reset_to_idle(cm_id_priv
);
2001 case IB_CM_REP_SENT
:
2002 case IB_CM_MRA_REP_RCVD
:
2003 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2005 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
2006 cm_id_priv
, reason
, ari
, ari_length
,
2007 private_data
, private_data_len
);
2009 cm_enter_timewait(cm_id_priv
);
2019 ret
= ib_post_send_mad(msg
, NULL
);
2023 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2026 EXPORT_SYMBOL(ib_send_cm_rej
);
2028 static void cm_format_rej_event(struct cm_work
*work
)
2030 struct cm_rej_msg
*rej_msg
;
2031 struct ib_cm_rej_event_param
*param
;
2033 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2034 param
= &work
->cm_event
.param
.rej_rcvd
;
2035 param
->ari
= rej_msg
->ari
;
2036 param
->ari_length
= cm_rej_get_reject_info_len(rej_msg
);
2037 param
->reason
= __be16_to_cpu(rej_msg
->reason
);
2038 work
->cm_event
.private_data
= &rej_msg
->private_data
;
2041 static struct cm_id_private
* cm_acquire_rejected_id(struct cm_rej_msg
*rej_msg
)
2043 struct cm_timewait_info
*timewait_info
;
2044 struct cm_id_private
*cm_id_priv
;
2045 unsigned long flags
;
2048 remote_id
= rej_msg
->local_comm_id
;
2050 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_TIMEOUT
) {
2051 spin_lock_irqsave(&cm
.lock
, flags
);
2052 timewait_info
= cm_find_remote_id( *((__be64
*) rej_msg
->ari
),
2054 if (!timewait_info
) {
2055 spin_unlock_irqrestore(&cm
.lock
, flags
);
2058 cm_id_priv
= idr_find(&cm
.local_id_table
,
2059 (__force
int) timewait_info
->work
.local_id
);
2061 if (cm_id_priv
->id
.remote_id
== remote_id
)
2062 atomic_inc(&cm_id_priv
->refcount
);
2066 spin_unlock_irqrestore(&cm
.lock
, flags
);
2067 } else if (cm_rej_get_msg_rejected(rej_msg
) == CM_MSG_RESPONSE_REQ
)
2068 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, 0);
2070 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, remote_id
);
2075 static int cm_rej_handler(struct cm_work
*work
)
2077 struct cm_id_private
*cm_id_priv
;
2078 struct cm_rej_msg
*rej_msg
;
2079 unsigned long flags
;
2082 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2083 cm_id_priv
= cm_acquire_rejected_id(rej_msg
);
2087 cm_format_rej_event(work
);
2089 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2090 switch (cm_id_priv
->id
.state
) {
2091 case IB_CM_REQ_SENT
:
2092 case IB_CM_MRA_REQ_RCVD
:
2093 case IB_CM_REP_SENT
:
2094 case IB_CM_MRA_REP_RCVD
:
2095 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2097 case IB_CM_REQ_RCVD
:
2098 case IB_CM_MRA_REQ_SENT
:
2099 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_STALE_CONN
)
2100 cm_enter_timewait(cm_id_priv
);
2102 cm_reset_to_idle(cm_id_priv
);
2104 case IB_CM_DREQ_SENT
:
2105 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2107 case IB_CM_REP_RCVD
:
2108 case IB_CM_MRA_REP_SENT
:
2109 case IB_CM_ESTABLISHED
:
2110 cm_enter_timewait(cm_id_priv
);
2113 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2118 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2120 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2121 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2124 cm_process_work(cm_id_priv
, work
);
2126 cm_deref_id(cm_id_priv
);
2129 cm_deref_id(cm_id_priv
);
2133 int ib_send_cm_mra(struct ib_cm_id
*cm_id
,
2135 const void *private_data
,
2136 u8 private_data_len
)
2138 struct cm_id_private
*cm_id_priv
;
2139 struct ib_mad_send_buf
*msg
;
2141 unsigned long flags
;
2144 if (private_data
&& private_data_len
> IB_CM_MRA_PRIVATE_DATA_SIZE
)
2147 data
= cm_copy_private_data(private_data
, private_data_len
);
2149 return PTR_ERR(data
);
2151 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2153 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2154 switch(cm_id_priv
->id
.state
) {
2155 case IB_CM_REQ_RCVD
:
2156 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2160 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2161 CM_MSG_RESPONSE_REQ
, service_timeout
,
2162 private_data
, private_data_len
);
2163 ret
= ib_post_send_mad(msg
, NULL
);
2166 cm_id
->state
= IB_CM_MRA_REQ_SENT
;
2168 case IB_CM_REP_RCVD
:
2169 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2173 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2174 CM_MSG_RESPONSE_REP
, service_timeout
,
2175 private_data
, private_data_len
);
2176 ret
= ib_post_send_mad(msg
, NULL
);
2179 cm_id
->state
= IB_CM_MRA_REP_SENT
;
2181 case IB_CM_ESTABLISHED
:
2182 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2186 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2187 CM_MSG_RESPONSE_OTHER
, service_timeout
,
2188 private_data
, private_data_len
);
2189 ret
= ib_post_send_mad(msg
, NULL
);
2192 cm_id
->lap_state
= IB_CM_MRA_LAP_SENT
;
2198 cm_id_priv
->service_timeout
= service_timeout
;
2199 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
2200 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2203 error1
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2207 error2
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2212 EXPORT_SYMBOL(ib_send_cm_mra
);
2214 static struct cm_id_private
* cm_acquire_mraed_id(struct cm_mra_msg
*mra_msg
)
2216 switch (cm_mra_get_msg_mraed(mra_msg
)) {
2217 case CM_MSG_RESPONSE_REQ
:
2218 return cm_acquire_id(mra_msg
->remote_comm_id
, 0);
2219 case CM_MSG_RESPONSE_REP
:
2220 case CM_MSG_RESPONSE_OTHER
:
2221 return cm_acquire_id(mra_msg
->remote_comm_id
,
2222 mra_msg
->local_comm_id
);
2228 static int cm_mra_handler(struct cm_work
*work
)
2230 struct cm_id_private
*cm_id_priv
;
2231 struct cm_mra_msg
*mra_msg
;
2232 unsigned long flags
;
2235 mra_msg
= (struct cm_mra_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2236 cm_id_priv
= cm_acquire_mraed_id(mra_msg
);
2240 work
->cm_event
.private_data
= &mra_msg
->private_data
;
2241 work
->cm_event
.param
.mra_rcvd
.service_timeout
=
2242 cm_mra_get_service_timeout(mra_msg
);
2243 timeout
= cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg
)) +
2244 cm_convert_to_ms(cm_id_priv
->av
.packet_life_time
);
2246 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2247 switch (cm_id_priv
->id
.state
) {
2248 case IB_CM_REQ_SENT
:
2249 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REQ
||
2250 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2251 cm_id_priv
->msg
, timeout
))
2253 cm_id_priv
->id
.state
= IB_CM_MRA_REQ_RCVD
;
2255 case IB_CM_REP_SENT
:
2256 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REP
||
2257 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2258 cm_id_priv
->msg
, timeout
))
2260 cm_id_priv
->id
.state
= IB_CM_MRA_REP_RCVD
;
2262 case IB_CM_ESTABLISHED
:
2263 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_OTHER
||
2264 cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
||
2265 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2266 cm_id_priv
->msg
, timeout
))
2268 cm_id_priv
->id
.lap_state
= IB_CM_MRA_LAP_RCVD
;
2274 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long)
2275 cm_id_priv
->id
.state
;
2276 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2278 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2279 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2282 cm_process_work(cm_id_priv
, work
);
2284 cm_deref_id(cm_id_priv
);
2287 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2288 cm_deref_id(cm_id_priv
);
2292 static void cm_format_lap(struct cm_lap_msg
*lap_msg
,
2293 struct cm_id_private
*cm_id_priv
,
2294 struct ib_sa_path_rec
*alternate_path
,
2295 const void *private_data
,
2296 u8 private_data_len
)
2298 cm_format_mad_hdr(&lap_msg
->hdr
, CM_LAP_ATTR_ID
,
2299 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_LAP
));
2300 lap_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2301 lap_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2302 cm_lap_set_remote_qpn(lap_msg
, cm_id_priv
->remote_qpn
);
2303 /* todo: need remote CM response timeout */
2304 cm_lap_set_remote_resp_timeout(lap_msg
, 0x1F);
2305 lap_msg
->alt_local_lid
= alternate_path
->slid
;
2306 lap_msg
->alt_remote_lid
= alternate_path
->dlid
;
2307 lap_msg
->alt_local_gid
= alternate_path
->sgid
;
2308 lap_msg
->alt_remote_gid
= alternate_path
->dgid
;
2309 cm_lap_set_flow_label(lap_msg
, alternate_path
->flow_label
);
2310 cm_lap_set_traffic_class(lap_msg
, alternate_path
->traffic_class
);
2311 lap_msg
->alt_hop_limit
= alternate_path
->hop_limit
;
2312 cm_lap_set_packet_rate(lap_msg
, alternate_path
->rate
);
2313 cm_lap_set_sl(lap_msg
, alternate_path
->sl
);
2314 cm_lap_set_subnet_local(lap_msg
, 1); /* local only... */
2315 cm_lap_set_local_ack_timeout(lap_msg
,
2316 min(31, alternate_path
->packet_life_time
+ 1));
2318 if (private_data
&& private_data_len
)
2319 memcpy(lap_msg
->private_data
, private_data
, private_data_len
);
2322 int ib_send_cm_lap(struct ib_cm_id
*cm_id
,
2323 struct ib_sa_path_rec
*alternate_path
,
2324 const void *private_data
,
2325 u8 private_data_len
)
2327 struct cm_id_private
*cm_id_priv
;
2328 struct ib_mad_send_buf
*msg
;
2329 unsigned long flags
;
2332 if (private_data
&& private_data_len
> IB_CM_LAP_PRIVATE_DATA_SIZE
)
2335 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2336 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2337 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2338 cm_id
->lap_state
!= IB_CM_LAP_IDLE
) {
2343 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2347 cm_format_lap((struct cm_lap_msg
*) msg
->mad
, cm_id_priv
,
2348 alternate_path
, private_data
, private_data_len
);
2349 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2350 msg
->context
[1] = (void *) (unsigned long) IB_CM_ESTABLISHED
;
2352 ret
= ib_post_send_mad(msg
, NULL
);
2354 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2359 cm_id
->lap_state
= IB_CM_LAP_SENT
;
2360 cm_id_priv
->msg
= msg
;
2362 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2365 EXPORT_SYMBOL(ib_send_cm_lap
);
2367 static void cm_format_path_from_lap(struct ib_sa_path_rec
*path
,
2368 struct cm_lap_msg
*lap_msg
)
2370 memset(path
, 0, sizeof *path
);
2371 path
->dgid
= lap_msg
->alt_local_gid
;
2372 path
->sgid
= lap_msg
->alt_remote_gid
;
2373 path
->dlid
= lap_msg
->alt_local_lid
;
2374 path
->slid
= lap_msg
->alt_remote_lid
;
2375 path
->flow_label
= cm_lap_get_flow_label(lap_msg
);
2376 path
->hop_limit
= lap_msg
->alt_hop_limit
;
2377 path
->traffic_class
= cm_lap_get_traffic_class(lap_msg
);
2378 path
->reversible
= 1;
2379 /* pkey is same as in REQ */
2380 path
->sl
= cm_lap_get_sl(lap_msg
);
2381 path
->mtu_selector
= IB_SA_EQ
;
2382 /* mtu is same as in REQ */
2383 path
->rate_selector
= IB_SA_EQ
;
2384 path
->rate
= cm_lap_get_packet_rate(lap_msg
);
2385 path
->packet_life_time_selector
= IB_SA_EQ
;
2386 path
->packet_life_time
= cm_lap_get_local_ack_timeout(lap_msg
);
2387 path
->packet_life_time
-= (path
->packet_life_time
> 0);
2390 static int cm_lap_handler(struct cm_work
*work
)
2392 struct cm_id_private
*cm_id_priv
;
2393 struct cm_lap_msg
*lap_msg
;
2394 struct ib_cm_lap_event_param
*param
;
2395 struct ib_mad_send_buf
*msg
= NULL
;
2396 unsigned long flags
;
2399 /* todo: verify LAP request and send reject APR if invalid. */
2400 lap_msg
= (struct cm_lap_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2401 cm_id_priv
= cm_acquire_id(lap_msg
->remote_comm_id
,
2402 lap_msg
->local_comm_id
);
2406 param
= &work
->cm_event
.param
.lap_rcvd
;
2407 param
->alternate_path
= &work
->path
[0];
2408 cm_format_path_from_lap(param
->alternate_path
, lap_msg
);
2409 work
->cm_event
.private_data
= &lap_msg
->private_data
;
2411 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2412 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
)
2415 switch (cm_id_priv
->id
.lap_state
) {
2416 case IB_CM_LAP_IDLE
:
2418 case IB_CM_MRA_LAP_SENT
:
2419 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
2422 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2423 CM_MSG_RESPONSE_OTHER
,
2424 cm_id_priv
->service_timeout
,
2425 cm_id_priv
->private_data
,
2426 cm_id_priv
->private_data_len
);
2427 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2429 if (ib_post_send_mad(msg
, NULL
))
2436 cm_id_priv
->id
.lap_state
= IB_CM_LAP_RCVD
;
2437 cm_id_priv
->tid
= lap_msg
->hdr
.tid
;
2438 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2440 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2441 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2444 cm_process_work(cm_id_priv
, work
);
2446 cm_deref_id(cm_id_priv
);
2449 unlock
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2450 deref
: cm_deref_id(cm_id_priv
);
2454 static void cm_format_apr(struct cm_apr_msg
*apr_msg
,
2455 struct cm_id_private
*cm_id_priv
,
2456 enum ib_cm_apr_status status
,
2459 const void *private_data
,
2460 u8 private_data_len
)
2462 cm_format_mad_hdr(&apr_msg
->hdr
, CM_APR_ATTR_ID
, cm_id_priv
->tid
);
2463 apr_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2464 apr_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2465 apr_msg
->ap_status
= (u8
) status
;
2467 if (info
&& info_length
) {
2468 apr_msg
->info_length
= info_length
;
2469 memcpy(apr_msg
->info
, info
, info_length
);
2472 if (private_data
&& private_data_len
)
2473 memcpy(apr_msg
->private_data
, private_data
, private_data_len
);
2476 int ib_send_cm_apr(struct ib_cm_id
*cm_id
,
2477 enum ib_cm_apr_status status
,
2480 const void *private_data
,
2481 u8 private_data_len
)
2483 struct cm_id_private
*cm_id_priv
;
2484 struct ib_mad_send_buf
*msg
;
2485 unsigned long flags
;
2488 if ((private_data
&& private_data_len
> IB_CM_APR_PRIVATE_DATA_SIZE
) ||
2489 (info
&& info_length
> IB_CM_APR_INFO_LENGTH
))
2492 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2493 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2494 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2495 (cm_id
->lap_state
!= IB_CM_LAP_RCVD
&&
2496 cm_id
->lap_state
!= IB_CM_MRA_LAP_SENT
)) {
2501 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2505 cm_format_apr((struct cm_apr_msg
*) msg
->mad
, cm_id_priv
, status
,
2506 info
, info_length
, private_data
, private_data_len
);
2507 ret
= ib_post_send_mad(msg
, NULL
);
2509 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2514 cm_id
->lap_state
= IB_CM_LAP_IDLE
;
2515 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2518 EXPORT_SYMBOL(ib_send_cm_apr
);
2520 static int cm_apr_handler(struct cm_work
*work
)
2522 struct cm_id_private
*cm_id_priv
;
2523 struct cm_apr_msg
*apr_msg
;
2524 unsigned long flags
;
2527 apr_msg
= (struct cm_apr_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2528 cm_id_priv
= cm_acquire_id(apr_msg
->remote_comm_id
,
2529 apr_msg
->local_comm_id
);
2531 return -EINVAL
; /* Unmatched reply. */
2533 work
->cm_event
.param
.apr_rcvd
.ap_status
= apr_msg
->ap_status
;
2534 work
->cm_event
.param
.apr_rcvd
.apr_info
= &apr_msg
->info
;
2535 work
->cm_event
.param
.apr_rcvd
.info_len
= apr_msg
->info_length
;
2536 work
->cm_event
.private_data
= &apr_msg
->private_data
;
2538 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2539 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
||
2540 (cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
&&
2541 cm_id_priv
->id
.lap_state
!= IB_CM_MRA_LAP_RCVD
)) {
2542 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2545 cm_id_priv
->id
.lap_state
= IB_CM_LAP_IDLE
;
2546 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2547 cm_id_priv
->msg
= NULL
;
2549 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2551 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2552 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2555 cm_process_work(cm_id_priv
, work
);
2557 cm_deref_id(cm_id_priv
);
2560 cm_deref_id(cm_id_priv
);
2564 static int cm_timewait_handler(struct cm_work
*work
)
2566 struct cm_timewait_info
*timewait_info
;
2567 struct cm_id_private
*cm_id_priv
;
2568 unsigned long flags
;
2571 timewait_info
= (struct cm_timewait_info
*)work
;
2572 cm_cleanup_timewait(timewait_info
);
2574 cm_id_priv
= cm_acquire_id(timewait_info
->work
.local_id
,
2575 timewait_info
->work
.remote_id
);
2579 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2580 if (cm_id_priv
->id
.state
!= IB_CM_TIMEWAIT
||
2581 cm_id_priv
->remote_qpn
!= timewait_info
->remote_qpn
) {
2582 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2585 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2586 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2588 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2589 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2592 cm_process_work(cm_id_priv
, work
);
2594 cm_deref_id(cm_id_priv
);
2597 cm_deref_id(cm_id_priv
);
2601 static void cm_format_sidr_req(struct cm_sidr_req_msg
*sidr_req_msg
,
2602 struct cm_id_private
*cm_id_priv
,
2603 struct ib_cm_sidr_req_param
*param
)
2605 cm_format_mad_hdr(&sidr_req_msg
->hdr
, CM_SIDR_REQ_ATTR_ID
,
2606 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_SIDR
));
2607 sidr_req_msg
->request_id
= cm_id_priv
->id
.local_id
;
2608 sidr_req_msg
->pkey
= cpu_to_be16(param
->path
->pkey
);
2609 sidr_req_msg
->service_id
= param
->service_id
;
2611 if (param
->private_data
&& param
->private_data_len
)
2612 memcpy(sidr_req_msg
->private_data
, param
->private_data
,
2613 param
->private_data_len
);
2616 int ib_send_cm_sidr_req(struct ib_cm_id
*cm_id
,
2617 struct ib_cm_sidr_req_param
*param
)
2619 struct cm_id_private
*cm_id_priv
;
2620 struct ib_mad_send_buf
*msg
;
2621 unsigned long flags
;
2624 if (!param
->path
|| (param
->private_data
&&
2625 param
->private_data_len
> IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
))
2628 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2629 ret
= cm_init_av_by_path(param
->path
, &cm_id_priv
->av
);
2633 cm_id
->service_id
= param
->service_id
;
2634 cm_id
->service_mask
= __constant_cpu_to_be64(~0ULL);
2635 cm_id_priv
->timeout_ms
= param
->timeout_ms
;
2636 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
2637 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2641 cm_format_sidr_req((struct cm_sidr_req_msg
*) msg
->mad
, cm_id_priv
,
2643 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2644 msg
->context
[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT
;
2646 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2647 if (cm_id
->state
== IB_CM_IDLE
)
2648 ret
= ib_post_send_mad(msg
, NULL
);
2653 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2657 cm_id
->state
= IB_CM_SIDR_REQ_SENT
;
2658 cm_id_priv
->msg
= msg
;
2659 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2663 EXPORT_SYMBOL(ib_send_cm_sidr_req
);
2665 static void cm_format_sidr_req_event(struct cm_work
*work
,
2666 struct ib_cm_id
*listen_id
)
2668 struct cm_sidr_req_msg
*sidr_req_msg
;
2669 struct ib_cm_sidr_req_event_param
*param
;
2671 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2672 work
->mad_recv_wc
->recv_buf
.mad
;
2673 param
= &work
->cm_event
.param
.sidr_req_rcvd
;
2674 param
->pkey
= __be16_to_cpu(sidr_req_msg
->pkey
);
2675 param
->listen_id
= listen_id
;
2676 param
->port
= work
->port
->port_num
;
2677 work
->cm_event
.private_data
= &sidr_req_msg
->private_data
;
2680 static int cm_sidr_req_handler(struct cm_work
*work
)
2682 struct ib_cm_id
*cm_id
;
2683 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
2684 struct cm_sidr_req_msg
*sidr_req_msg
;
2686 unsigned long flags
;
2688 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->device
, NULL
, NULL
);
2690 return PTR_ERR(cm_id
);
2691 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2693 /* Record SGID/SLID and request ID for lookup. */
2694 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2695 work
->mad_recv_wc
->recv_buf
.mad
;
2696 wc
= work
->mad_recv_wc
->wc
;
2697 cm_id_priv
->av
.dgid
.global
.subnet_prefix
= cpu_to_be64(wc
->slid
);
2698 cm_id_priv
->av
.dgid
.global
.interface_id
= 0;
2699 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
2700 work
->mad_recv_wc
->recv_buf
.grh
,
2702 cm_id_priv
->id
.remote_id
= sidr_req_msg
->request_id
;
2703 cm_id_priv
->id
.state
= IB_CM_SIDR_REQ_RCVD
;
2704 cm_id_priv
->tid
= sidr_req_msg
->hdr
.tid
;
2705 atomic_inc(&cm_id_priv
->work_count
);
2707 spin_lock_irqsave(&cm
.lock
, flags
);
2708 cur_cm_id_priv
= cm_insert_remote_sidr(cm_id_priv
);
2709 if (cur_cm_id_priv
) {
2710 spin_unlock_irqrestore(&cm
.lock
, flags
);
2711 goto out
; /* Duplicate message. */
2713 cur_cm_id_priv
= cm_find_listen(cm_id
->device
,
2714 sidr_req_msg
->service_id
,
2715 sidr_req_msg
->private_data
);
2716 if (!cur_cm_id_priv
) {
2717 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
2718 spin_unlock_irqrestore(&cm
.lock
, flags
);
2719 /* todo: reply with no match */
2720 goto out
; /* No match. */
2722 atomic_inc(&cur_cm_id_priv
->refcount
);
2723 spin_unlock_irqrestore(&cm
.lock
, flags
);
2725 cm_id_priv
->id
.cm_handler
= cur_cm_id_priv
->id
.cm_handler
;
2726 cm_id_priv
->id
.context
= cur_cm_id_priv
->id
.context
;
2727 cm_id_priv
->id
.service_id
= sidr_req_msg
->service_id
;
2728 cm_id_priv
->id
.service_mask
= __constant_cpu_to_be64(~0ULL);
2730 cm_format_sidr_req_event(work
, &cur_cm_id_priv
->id
);
2731 cm_process_work(cm_id_priv
, work
);
2732 cm_deref_id(cur_cm_id_priv
);
2735 ib_destroy_cm_id(&cm_id_priv
->id
);
2739 static void cm_format_sidr_rep(struct cm_sidr_rep_msg
*sidr_rep_msg
,
2740 struct cm_id_private
*cm_id_priv
,
2741 struct ib_cm_sidr_rep_param
*param
)
2743 cm_format_mad_hdr(&sidr_rep_msg
->hdr
, CM_SIDR_REP_ATTR_ID
,
2745 sidr_rep_msg
->request_id
= cm_id_priv
->id
.remote_id
;
2746 sidr_rep_msg
->status
= param
->status
;
2747 cm_sidr_rep_set_qpn(sidr_rep_msg
, cpu_to_be32(param
->qp_num
));
2748 sidr_rep_msg
->service_id
= cm_id_priv
->id
.service_id
;
2749 sidr_rep_msg
->qkey
= cpu_to_be32(param
->qkey
);
2751 if (param
->info
&& param
->info_length
)
2752 memcpy(sidr_rep_msg
->info
, param
->info
, param
->info_length
);
2754 if (param
->private_data
&& param
->private_data_len
)
2755 memcpy(sidr_rep_msg
->private_data
, param
->private_data
,
2756 param
->private_data_len
);
2759 int ib_send_cm_sidr_rep(struct ib_cm_id
*cm_id
,
2760 struct ib_cm_sidr_rep_param
*param
)
2762 struct cm_id_private
*cm_id_priv
;
2763 struct ib_mad_send_buf
*msg
;
2764 unsigned long flags
;
2767 if ((param
->info
&& param
->info_length
> IB_CM_SIDR_REP_INFO_LENGTH
) ||
2768 (param
->private_data
&&
2769 param
->private_data_len
> IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
))
2772 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2773 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2774 if (cm_id
->state
!= IB_CM_SIDR_REQ_RCVD
) {
2779 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2783 cm_format_sidr_rep((struct cm_sidr_rep_msg
*) msg
->mad
, cm_id_priv
,
2785 ret
= ib_post_send_mad(msg
, NULL
);
2787 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2791 cm_id
->state
= IB_CM_IDLE
;
2792 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2794 spin_lock_irqsave(&cm
.lock
, flags
);
2795 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
2796 spin_unlock_irqrestore(&cm
.lock
, flags
);
2799 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2802 EXPORT_SYMBOL(ib_send_cm_sidr_rep
);
2804 static void cm_format_sidr_rep_event(struct cm_work
*work
)
2806 struct cm_sidr_rep_msg
*sidr_rep_msg
;
2807 struct ib_cm_sidr_rep_event_param
*param
;
2809 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
2810 work
->mad_recv_wc
->recv_buf
.mad
;
2811 param
= &work
->cm_event
.param
.sidr_rep_rcvd
;
2812 param
->status
= sidr_rep_msg
->status
;
2813 param
->qkey
= be32_to_cpu(sidr_rep_msg
->qkey
);
2814 param
->qpn
= be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg
));
2815 param
->info
= &sidr_rep_msg
->info
;
2816 param
->info_len
= sidr_rep_msg
->info_length
;
2817 work
->cm_event
.private_data
= &sidr_rep_msg
->private_data
;
2820 static int cm_sidr_rep_handler(struct cm_work
*work
)
2822 struct cm_sidr_rep_msg
*sidr_rep_msg
;
2823 struct cm_id_private
*cm_id_priv
;
2824 unsigned long flags
;
2826 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
2827 work
->mad_recv_wc
->recv_buf
.mad
;
2828 cm_id_priv
= cm_acquire_id(sidr_rep_msg
->request_id
, 0);
2830 return -EINVAL
; /* Unmatched reply. */
2832 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2833 if (cm_id_priv
->id
.state
!= IB_CM_SIDR_REQ_SENT
) {
2834 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2837 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2838 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2839 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2841 cm_format_sidr_rep_event(work
);
2842 cm_process_work(cm_id_priv
, work
);
2845 cm_deref_id(cm_id_priv
);
2849 static void cm_process_send_error(struct ib_mad_send_buf
*msg
,
2850 enum ib_wc_status wc_status
)
2852 struct cm_id_private
*cm_id_priv
;
2853 struct ib_cm_event cm_event
;
2854 enum ib_cm_state state
;
2855 unsigned long flags
;
2858 memset(&cm_event
, 0, sizeof cm_event
);
2859 cm_id_priv
= msg
->context
[0];
2861 /* Discard old sends or ones without a response. */
2862 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2863 state
= (enum ib_cm_state
) (unsigned long) msg
->context
[1];
2864 if (msg
!= cm_id_priv
->msg
|| state
!= cm_id_priv
->id
.state
)
2868 case IB_CM_REQ_SENT
:
2869 case IB_CM_MRA_REQ_RCVD
:
2870 cm_reset_to_idle(cm_id_priv
);
2871 cm_event
.event
= IB_CM_REQ_ERROR
;
2873 case IB_CM_REP_SENT
:
2874 case IB_CM_MRA_REP_RCVD
:
2875 cm_reset_to_idle(cm_id_priv
);
2876 cm_event
.event
= IB_CM_REP_ERROR
;
2878 case IB_CM_DREQ_SENT
:
2879 cm_enter_timewait(cm_id_priv
);
2880 cm_event
.event
= IB_CM_DREQ_ERROR
;
2882 case IB_CM_SIDR_REQ_SENT
:
2883 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2884 cm_event
.event
= IB_CM_SIDR_REQ_ERROR
;
2889 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2890 cm_event
.param
.send_status
= wc_status
;
2892 /* No other events can occur on the cm_id at this point. */
2893 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &cm_event
);
2896 ib_destroy_cm_id(&cm_id_priv
->id
);
2899 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2903 static void cm_send_handler(struct ib_mad_agent
*mad_agent
,
2904 struct ib_mad_send_wc
*mad_send_wc
)
2906 struct ib_mad_send_buf
*msg
= mad_send_wc
->send_buf
;
2908 switch (mad_send_wc
->status
) {
2910 case IB_WC_WR_FLUSH_ERR
:
2914 if (msg
->context
[0] && msg
->context
[1])
2915 cm_process_send_error(msg
, mad_send_wc
->status
);
2922 static void cm_work_handler(void *data
)
2924 struct cm_work
*work
= data
;
2927 switch (work
->cm_event
.event
) {
2928 case IB_CM_REQ_RECEIVED
:
2929 ret
= cm_req_handler(work
);
2931 case IB_CM_MRA_RECEIVED
:
2932 ret
= cm_mra_handler(work
);
2934 case IB_CM_REJ_RECEIVED
:
2935 ret
= cm_rej_handler(work
);
2937 case IB_CM_REP_RECEIVED
:
2938 ret
= cm_rep_handler(work
);
2940 case IB_CM_RTU_RECEIVED
:
2941 ret
= cm_rtu_handler(work
);
2943 case IB_CM_USER_ESTABLISHED
:
2944 ret
= cm_establish_handler(work
);
2946 case IB_CM_DREQ_RECEIVED
:
2947 ret
= cm_dreq_handler(work
);
2949 case IB_CM_DREP_RECEIVED
:
2950 ret
= cm_drep_handler(work
);
2952 case IB_CM_SIDR_REQ_RECEIVED
:
2953 ret
= cm_sidr_req_handler(work
);
2955 case IB_CM_SIDR_REP_RECEIVED
:
2956 ret
= cm_sidr_rep_handler(work
);
2958 case IB_CM_LAP_RECEIVED
:
2959 ret
= cm_lap_handler(work
);
2961 case IB_CM_APR_RECEIVED
:
2962 ret
= cm_apr_handler(work
);
2964 case IB_CM_TIMEWAIT_EXIT
:
2965 ret
= cm_timewait_handler(work
);
2975 int ib_cm_establish(struct ib_cm_id
*cm_id
)
2977 struct cm_id_private
*cm_id_priv
;
2978 struct cm_work
*work
;
2979 unsigned long flags
;
2982 work
= kmalloc(sizeof *work
, GFP_ATOMIC
);
2986 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2987 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2988 switch (cm_id
->state
)
2990 case IB_CM_REP_SENT
:
2991 case IB_CM_MRA_REP_RCVD
:
2992 cm_id
->state
= IB_CM_ESTABLISHED
;
2994 case IB_CM_ESTABLISHED
:
3001 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3009 * The CM worker thread may try to destroy the cm_id before it
3010 * can execute this work item. To prevent potential deadlock,
3011 * we need to find the cm_id once we're in the context of the
3012 * worker thread, rather than holding a reference on it.
3014 INIT_WORK(&work
->work
, cm_work_handler
, work
);
3015 work
->local_id
= cm_id
->local_id
;
3016 work
->remote_id
= cm_id
->remote_id
;
3017 work
->mad_recv_wc
= NULL
;
3018 work
->cm_event
.event
= IB_CM_USER_ESTABLISHED
;
3019 queue_work(cm
.wq
, &work
->work
);
3023 EXPORT_SYMBOL(ib_cm_establish
);
3025 static void cm_recv_handler(struct ib_mad_agent
*mad_agent
,
3026 struct ib_mad_recv_wc
*mad_recv_wc
)
3028 struct cm_work
*work
;
3029 enum ib_cm_event_type event
;
3032 switch (mad_recv_wc
->recv_buf
.mad
->mad_hdr
.attr_id
) {
3033 case CM_REQ_ATTR_ID
:
3034 paths
= 1 + (((struct cm_req_msg
*) mad_recv_wc
->recv_buf
.mad
)->
3035 alt_local_lid
!= 0);
3036 event
= IB_CM_REQ_RECEIVED
;
3038 case CM_MRA_ATTR_ID
:
3039 event
= IB_CM_MRA_RECEIVED
;
3041 case CM_REJ_ATTR_ID
:
3042 event
= IB_CM_REJ_RECEIVED
;
3044 case CM_REP_ATTR_ID
:
3045 event
= IB_CM_REP_RECEIVED
;
3047 case CM_RTU_ATTR_ID
:
3048 event
= IB_CM_RTU_RECEIVED
;
3050 case CM_DREQ_ATTR_ID
:
3051 event
= IB_CM_DREQ_RECEIVED
;
3053 case CM_DREP_ATTR_ID
:
3054 event
= IB_CM_DREP_RECEIVED
;
3056 case CM_SIDR_REQ_ATTR_ID
:
3057 event
= IB_CM_SIDR_REQ_RECEIVED
;
3059 case CM_SIDR_REP_ATTR_ID
:
3060 event
= IB_CM_SIDR_REP_RECEIVED
;
3062 case CM_LAP_ATTR_ID
:
3064 event
= IB_CM_LAP_RECEIVED
;
3066 case CM_APR_ATTR_ID
:
3067 event
= IB_CM_APR_RECEIVED
;
3070 ib_free_recv_mad(mad_recv_wc
);
3074 work
= kmalloc(sizeof *work
+ sizeof(struct ib_sa_path_rec
) * paths
,
3077 ib_free_recv_mad(mad_recv_wc
);
3081 INIT_WORK(&work
->work
, cm_work_handler
, work
);
3082 work
->cm_event
.event
= event
;
3083 work
->mad_recv_wc
= mad_recv_wc
;
3084 work
->port
= (struct cm_port
*)mad_agent
->context
;
3085 queue_work(cm
.wq
, &work
->work
);
3088 static int cm_init_qp_init_attr(struct cm_id_private
*cm_id_priv
,
3089 struct ib_qp_attr
*qp_attr
,
3092 unsigned long flags
;
3095 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3096 switch (cm_id_priv
->id
.state
) {
3097 case IB_CM_REQ_SENT
:
3098 case IB_CM_MRA_REQ_RCVD
:
3099 case IB_CM_REQ_RCVD
:
3100 case IB_CM_MRA_REQ_SENT
:
3101 case IB_CM_REP_RCVD
:
3102 case IB_CM_MRA_REP_SENT
:
3103 case IB_CM_REP_SENT
:
3104 case IB_CM_MRA_REP_RCVD
:
3105 case IB_CM_ESTABLISHED
:
3106 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
|
3107 IB_QP_PKEY_INDEX
| IB_QP_PORT
;
3108 qp_attr
->qp_access_flags
= IB_ACCESS_LOCAL_WRITE
|
3109 IB_ACCESS_REMOTE_WRITE
;
3110 if (cm_id_priv
->responder_resources
)
3111 qp_attr
->qp_access_flags
|= IB_ACCESS_REMOTE_READ
;
3112 qp_attr
->pkey_index
= cm_id_priv
->av
.pkey_index
;
3113 qp_attr
->port_num
= cm_id_priv
->av
.port
->port_num
;
3120 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3124 static int cm_init_qp_rtr_attr(struct cm_id_private
*cm_id_priv
,
3125 struct ib_qp_attr
*qp_attr
,
3128 unsigned long flags
;
3131 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3132 switch (cm_id_priv
->id
.state
) {
3133 case IB_CM_REQ_RCVD
:
3134 case IB_CM_MRA_REQ_SENT
:
3135 case IB_CM_REP_RCVD
:
3136 case IB_CM_MRA_REP_SENT
:
3137 case IB_CM_REP_SENT
:
3138 case IB_CM_MRA_REP_RCVD
:
3139 case IB_CM_ESTABLISHED
:
3140 *qp_attr_mask
= IB_QP_STATE
| IB_QP_AV
| IB_QP_PATH_MTU
|
3141 IB_QP_DEST_QPN
| IB_QP_RQ_PSN
;
3142 qp_attr
->ah_attr
= cm_id_priv
->av
.ah_attr
;
3143 qp_attr
->path_mtu
= cm_id_priv
->path_mtu
;
3144 qp_attr
->dest_qp_num
= be32_to_cpu(cm_id_priv
->remote_qpn
);
3145 qp_attr
->rq_psn
= be32_to_cpu(cm_id_priv
->rq_psn
);
3146 if (cm_id_priv
->qp_type
== IB_QPT_RC
) {
3147 *qp_attr_mask
|= IB_QP_MAX_DEST_RD_ATOMIC
|
3148 IB_QP_MIN_RNR_TIMER
;
3149 qp_attr
->max_dest_rd_atomic
=
3150 cm_id_priv
->responder_resources
;
3151 qp_attr
->min_rnr_timer
= 0;
3153 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3154 *qp_attr_mask
|= IB_QP_ALT_PATH
;
3155 qp_attr
->alt_port_num
= cm_id_priv
->alt_av
.port
->port_num
;
3156 qp_attr
->alt_ah_attr
= cm_id_priv
->alt_av
.ah_attr
;
3164 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3168 static int cm_init_qp_rts_attr(struct cm_id_private
*cm_id_priv
,
3169 struct ib_qp_attr
*qp_attr
,
3172 unsigned long flags
;
3175 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3176 switch (cm_id_priv
->id
.state
) {
3177 case IB_CM_REP_RCVD
:
3178 case IB_CM_MRA_REP_SENT
:
3179 case IB_CM_REP_SENT
:
3180 case IB_CM_MRA_REP_RCVD
:
3181 case IB_CM_ESTABLISHED
:
3182 *qp_attr_mask
= IB_QP_STATE
| IB_QP_SQ_PSN
;
3183 qp_attr
->sq_psn
= be32_to_cpu(cm_id_priv
->sq_psn
);
3184 if (cm_id_priv
->qp_type
== IB_QPT_RC
) {
3185 *qp_attr_mask
|= IB_QP_TIMEOUT
| IB_QP_RETRY_CNT
|
3187 IB_QP_MAX_QP_RD_ATOMIC
;
3188 qp_attr
->timeout
= cm_id_priv
->local_ack_timeout
;
3189 qp_attr
->retry_cnt
= cm_id_priv
->retry_count
;
3190 qp_attr
->rnr_retry
= cm_id_priv
->rnr_retry_count
;
3191 qp_attr
->max_rd_atomic
= cm_id_priv
->initiator_depth
;
3193 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3194 *qp_attr_mask
|= IB_QP_PATH_MIG_STATE
;
3195 qp_attr
->path_mig_state
= IB_MIG_REARM
;
3203 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3207 int ib_cm_init_qp_attr(struct ib_cm_id
*cm_id
,
3208 struct ib_qp_attr
*qp_attr
,
3211 struct cm_id_private
*cm_id_priv
;
3214 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3215 switch (qp_attr
->qp_state
) {
3217 ret
= cm_init_qp_init_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3220 ret
= cm_init_qp_rtr_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3223 ret
= cm_init_qp_rts_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3231 EXPORT_SYMBOL(ib_cm_init_qp_attr
);
3233 static void cm_add_one(struct ib_device
*device
)
3235 struct cm_device
*cm_dev
;
3236 struct cm_port
*port
;
3237 struct ib_mad_reg_req reg_req
= {
3238 .mgmt_class
= IB_MGMT_CLASS_CM
,
3239 .mgmt_class_version
= IB_CM_CLASS_VERSION
3241 struct ib_port_modify port_modify
= {
3242 .set_port_cap_mask
= IB_PORT_CM_SUP
3244 unsigned long flags
;
3248 cm_dev
= kmalloc(sizeof(*cm_dev
) + sizeof(*port
) *
3249 device
->phys_port_cnt
, GFP_KERNEL
);
3253 cm_dev
->device
= device
;
3254 cm_dev
->ca_guid
= device
->node_guid
;
3256 set_bit(IB_MGMT_METHOD_SEND
, reg_req
.method_mask
);
3257 for (i
= 1; i
<= device
->phys_port_cnt
; i
++) {
3258 port
= &cm_dev
->port
[i
-1];
3259 port
->cm_dev
= cm_dev
;
3261 port
->mad_agent
= ib_register_mad_agent(device
, i
,
3268 if (IS_ERR(port
->mad_agent
))
3271 ret
= ib_modify_port(device
, i
, 0, &port_modify
);
3275 ib_set_client_data(device
, &cm_client
, cm_dev
);
3277 write_lock_irqsave(&cm
.device_lock
, flags
);
3278 list_add_tail(&cm_dev
->list
, &cm
.device_list
);
3279 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3283 ib_unregister_mad_agent(port
->mad_agent
);
3285 port_modify
.set_port_cap_mask
= 0;
3286 port_modify
.clr_port_cap_mask
= IB_PORT_CM_SUP
;
3288 port
= &cm_dev
->port
[i
-1];
3289 ib_modify_port(device
, port
->port_num
, 0, &port_modify
);
3290 ib_unregister_mad_agent(port
->mad_agent
);
3295 static void cm_remove_one(struct ib_device
*device
)
3297 struct cm_device
*cm_dev
;
3298 struct cm_port
*port
;
3299 struct ib_port_modify port_modify
= {
3300 .clr_port_cap_mask
= IB_PORT_CM_SUP
3302 unsigned long flags
;
3305 cm_dev
= ib_get_client_data(device
, &cm_client
);
3309 write_lock_irqsave(&cm
.device_lock
, flags
);
3310 list_del(&cm_dev
->list
);
3311 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3313 for (i
= 1; i
<= device
->phys_port_cnt
; i
++) {
3314 port
= &cm_dev
->port
[i
-1];
3315 ib_modify_port(device
, port
->port_num
, 0, &port_modify
);
3316 ib_unregister_mad_agent(port
->mad_agent
);
3321 static int __init
ib_cm_init(void)
3325 memset(&cm
, 0, sizeof cm
);
3326 INIT_LIST_HEAD(&cm
.device_list
);
3327 rwlock_init(&cm
.device_lock
);
3328 spin_lock_init(&cm
.lock
);
3329 cm
.listen_service_table
= RB_ROOT
;
3330 cm
.listen_service_id
= __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID
);
3331 cm
.remote_id_table
= RB_ROOT
;
3332 cm
.remote_qp_table
= RB_ROOT
;
3333 cm
.remote_sidr_table
= RB_ROOT
;
3334 idr_init(&cm
.local_id_table
);
3335 idr_pre_get(&cm
.local_id_table
, GFP_KERNEL
);
3337 cm
.wq
= create_workqueue("ib_cm");
3341 ret
= ib_register_client(&cm_client
);
3347 destroy_workqueue(cm
.wq
);
3351 static void __exit
ib_cm_cleanup(void)
3353 destroy_workqueue(cm
.wq
);
3354 ib_unregister_client(&cm_client
);
3355 idr_destroy(&cm
.local_id_table
);
3358 module_init(ib_cm_init
);
3359 module_exit(ib_cm_cleanup
);