2 * Copyright (c) 2004-2007 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
36 #include <linux/completion.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/device.h>
39 #include <linux/err.h>
40 #include <linux/idr.h>
41 #include <linux/interrupt.h>
42 #include <linux/random.h>
43 #include <linux/rbtree.h>
44 #include <linux/spinlock.h>
45 #include <linux/slab.h>
46 #include <linux/sysfs.h>
47 #include <linux/workqueue.h>
48 #include <linux/kdev_t.h>
50 #include <rdma/ib_cache.h>
51 #include <rdma/ib_cm.h>
54 MODULE_AUTHOR("Sean Hefty");
55 MODULE_DESCRIPTION("InfiniBand CM");
56 MODULE_LICENSE("Dual BSD/GPL");
58 static void cm_add_one(struct ib_device
*device
);
59 static void cm_remove_one(struct ib_device
*device
);
61 static struct ib_client cm_client
= {
64 .remove
= cm_remove_one
69 struct list_head device_list
;
71 struct rb_root listen_service_table
;
72 u64 listen_service_id
;
73 /* struct rb_root peer_service_table; todo: fix peer to peer */
74 struct rb_root remote_qp_table
;
75 struct rb_root remote_id_table
;
76 struct rb_root remote_sidr_table
;
77 struct idr local_id_table
;
78 __be32 random_id_operand
;
79 struct list_head timewait_list
;
80 struct workqueue_struct
*wq
;
83 /* Counter indexes ordered by attribute ID */
97 CM_ATTR_ID_OFFSET
= 0x0010,
108 static char const counter_group_names
[CM_COUNTER_GROUPS
]
109 [sizeof("cm_rx_duplicates")] = {
110 "cm_tx_msgs", "cm_tx_retries",
111 "cm_rx_msgs", "cm_rx_duplicates"
114 struct cm_counter_group
{
116 atomic_long_t counter
[CM_ATTR_COUNT
];
119 struct cm_counter_attribute
{
120 struct attribute attr
;
124 #define CM_COUNTER_ATTR(_name, _index) \
125 struct cm_counter_attribute cm_##_name##_counter_attr = { \
126 .attr = { .name = __stringify(_name), .mode = 0444 }, \
130 static CM_COUNTER_ATTR(req
, CM_REQ_COUNTER
);
131 static CM_COUNTER_ATTR(mra
, CM_MRA_COUNTER
);
132 static CM_COUNTER_ATTR(rej
, CM_REJ_COUNTER
);
133 static CM_COUNTER_ATTR(rep
, CM_REP_COUNTER
);
134 static CM_COUNTER_ATTR(rtu
, CM_RTU_COUNTER
);
135 static CM_COUNTER_ATTR(dreq
, CM_DREQ_COUNTER
);
136 static CM_COUNTER_ATTR(drep
, CM_DREP_COUNTER
);
137 static CM_COUNTER_ATTR(sidr_req
, CM_SIDR_REQ_COUNTER
);
138 static CM_COUNTER_ATTR(sidr_rep
, CM_SIDR_REP_COUNTER
);
139 static CM_COUNTER_ATTR(lap
, CM_LAP_COUNTER
);
140 static CM_COUNTER_ATTR(apr
, CM_APR_COUNTER
);
142 static struct attribute
*cm_counter_default_attrs
[] = {
143 &cm_req_counter_attr
.attr
,
144 &cm_mra_counter_attr
.attr
,
145 &cm_rej_counter_attr
.attr
,
146 &cm_rep_counter_attr
.attr
,
147 &cm_rtu_counter_attr
.attr
,
148 &cm_dreq_counter_attr
.attr
,
149 &cm_drep_counter_attr
.attr
,
150 &cm_sidr_req_counter_attr
.attr
,
151 &cm_sidr_rep_counter_attr
.attr
,
152 &cm_lap_counter_attr
.attr
,
153 &cm_apr_counter_attr
.attr
,
158 struct cm_device
*cm_dev
;
159 struct ib_mad_agent
*mad_agent
;
160 struct kobject port_obj
;
162 struct cm_counter_group counter_group
[CM_COUNTER_GROUPS
];
166 struct list_head list
;
167 struct ib_device
*ib_device
;
168 struct device
*device
;
170 struct cm_port
*port
[0];
174 struct cm_port
*port
;
176 struct ib_ah_attr ah_attr
;
182 struct delayed_work work
;
183 struct list_head list
;
184 struct cm_port
*port
;
185 struct ib_mad_recv_wc
*mad_recv_wc
; /* Received MADs */
186 __be32 local_id
; /* Established / timewait */
188 struct ib_cm_event cm_event
;
189 struct ib_sa_path_rec path
[0];
192 struct cm_timewait_info
{
193 struct cm_work work
; /* Must be first. */
194 struct list_head list
;
195 struct rb_node remote_qp_node
;
196 struct rb_node remote_id_node
;
197 __be64 remote_ca_guid
;
199 u8 inserted_remote_qp
;
200 u8 inserted_remote_id
;
203 struct cm_id_private
{
206 struct rb_node service_node
;
207 struct rb_node sidr_id_node
;
208 spinlock_t lock
; /* Do not acquire inside cm.lock */
209 struct completion comp
;
212 struct ib_mad_send_buf
*msg
;
213 struct cm_timewait_info
*timewait_info
;
214 /* todo: use alternate port on send failure */
217 struct ib_cm_compare_data
*compare_data
;
223 enum ib_qp_type qp_type
;
227 enum ib_mtu path_mtu
;
232 u8 responder_resources
;
239 struct list_head work_list
;
243 static void cm_work_handler(struct work_struct
*work
);
245 static inline void cm_deref_id(struct cm_id_private
*cm_id_priv
)
247 if (atomic_dec_and_test(&cm_id_priv
->refcount
))
248 complete(&cm_id_priv
->comp
);
251 static int cm_alloc_msg(struct cm_id_private
*cm_id_priv
,
252 struct ib_mad_send_buf
**msg
)
254 struct ib_mad_agent
*mad_agent
;
255 struct ib_mad_send_buf
*m
;
258 mad_agent
= cm_id_priv
->av
.port
->mad_agent
;
259 ah
= ib_create_ah(mad_agent
->qp
->pd
, &cm_id_priv
->av
.ah_attr
);
263 m
= ib_create_send_mad(mad_agent
, cm_id_priv
->id
.remote_cm_qpn
,
264 cm_id_priv
->av
.pkey_index
,
265 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
272 /* Timeout set by caller if response is expected. */
274 m
->retries
= cm_id_priv
->max_cm_retries
;
276 atomic_inc(&cm_id_priv
->refcount
);
277 m
->context
[0] = cm_id_priv
;
282 static int cm_alloc_response_msg(struct cm_port
*port
,
283 struct ib_mad_recv_wc
*mad_recv_wc
,
284 struct ib_mad_send_buf
**msg
)
286 struct ib_mad_send_buf
*m
;
289 ah
= ib_create_ah_from_wc(port
->mad_agent
->qp
->pd
, mad_recv_wc
->wc
,
290 mad_recv_wc
->recv_buf
.grh
, port
->port_num
);
294 m
= ib_create_send_mad(port
->mad_agent
, 1, mad_recv_wc
->wc
->pkey_index
,
295 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
306 static void cm_free_msg(struct ib_mad_send_buf
*msg
)
308 ib_destroy_ah(msg
->ah
);
310 cm_deref_id(msg
->context
[0]);
311 ib_free_send_mad(msg
);
314 static void * cm_copy_private_data(const void *private_data
,
319 if (!private_data
|| !private_data_len
)
322 data
= kmemdup(private_data
, private_data_len
, GFP_KERNEL
);
324 return ERR_PTR(-ENOMEM
);
329 static void cm_set_private_data(struct cm_id_private
*cm_id_priv
,
330 void *private_data
, u8 private_data_len
)
332 if (cm_id_priv
->private_data
&& cm_id_priv
->private_data_len
)
333 kfree(cm_id_priv
->private_data
);
335 cm_id_priv
->private_data
= private_data
;
336 cm_id_priv
->private_data_len
= private_data_len
;
339 static void cm_init_av_for_response(struct cm_port
*port
, struct ib_wc
*wc
,
340 struct ib_grh
*grh
, struct cm_av
*av
)
343 av
->pkey_index
= wc
->pkey_index
;
344 ib_init_ah_from_wc(port
->cm_dev
->ib_device
, port
->port_num
, wc
,
348 static int cm_init_av_by_path(struct ib_sa_path_rec
*path
, struct cm_av
*av
)
350 struct cm_device
*cm_dev
;
351 struct cm_port
*port
= NULL
;
356 read_lock_irqsave(&cm
.device_lock
, flags
);
357 list_for_each_entry(cm_dev
, &cm
.device_list
, list
) {
358 if (!ib_find_cached_gid(cm_dev
->ib_device
, &path
->sgid
,
360 port
= cm_dev
->port
[p
-1];
364 read_unlock_irqrestore(&cm
.device_lock
, flags
);
369 ret
= ib_find_cached_pkey(cm_dev
->ib_device
, port
->port_num
,
370 be16_to_cpu(path
->pkey
), &av
->pkey_index
);
375 ib_init_ah_from_path(cm_dev
->ib_device
, port
->port_num
, path
,
377 av
->timeout
= path
->packet_life_time
+ 1;
381 static int cm_alloc_id(struct cm_id_private
*cm_id_priv
)
388 spin_lock_irqsave(&cm
.lock
, flags
);
389 ret
= idr_get_new_above(&cm
.local_id_table
, cm_id_priv
,
392 next_id
= ((unsigned) id
+ 1) & MAX_ID_MASK
;
393 spin_unlock_irqrestore(&cm
.lock
, flags
);
394 } while( (ret
== -EAGAIN
) && idr_pre_get(&cm
.local_id_table
, GFP_KERNEL
) );
396 cm_id_priv
->id
.local_id
= (__force __be32
)id
^ cm
.random_id_operand
;
400 static void cm_free_id(__be32 local_id
)
402 spin_lock_irq(&cm
.lock
);
403 idr_remove(&cm
.local_id_table
,
404 (__force
int) (local_id
^ cm
.random_id_operand
));
405 spin_unlock_irq(&cm
.lock
);
408 static struct cm_id_private
* cm_get_id(__be32 local_id
, __be32 remote_id
)
410 struct cm_id_private
*cm_id_priv
;
412 cm_id_priv
= idr_find(&cm
.local_id_table
,
413 (__force
int) (local_id
^ cm
.random_id_operand
));
415 if (cm_id_priv
->id
.remote_id
== remote_id
)
416 atomic_inc(&cm_id_priv
->refcount
);
424 static struct cm_id_private
* cm_acquire_id(__be32 local_id
, __be32 remote_id
)
426 struct cm_id_private
*cm_id_priv
;
428 spin_lock_irq(&cm
.lock
);
429 cm_id_priv
= cm_get_id(local_id
, remote_id
);
430 spin_unlock_irq(&cm
.lock
);
435 static void cm_mask_copy(u8
*dst
, u8
*src
, u8
*mask
)
439 for (i
= 0; i
< IB_CM_COMPARE_SIZE
/ sizeof(unsigned long); i
++)
440 ((unsigned long *) dst
)[i
] = ((unsigned long *) src
)[i
] &
441 ((unsigned long *) mask
)[i
];
444 static int cm_compare_data(struct ib_cm_compare_data
*src_data
,
445 struct ib_cm_compare_data
*dst_data
)
447 u8 src
[IB_CM_COMPARE_SIZE
];
448 u8 dst
[IB_CM_COMPARE_SIZE
];
450 if (!src_data
|| !dst_data
)
453 cm_mask_copy(src
, src_data
->data
, dst_data
->mask
);
454 cm_mask_copy(dst
, dst_data
->data
, src_data
->mask
);
455 return memcmp(src
, dst
, IB_CM_COMPARE_SIZE
);
458 static int cm_compare_private_data(u8
*private_data
,
459 struct ib_cm_compare_data
*dst_data
)
461 u8 src
[IB_CM_COMPARE_SIZE
];
466 cm_mask_copy(src
, private_data
, dst_data
->mask
);
467 return memcmp(src
, dst_data
->data
, IB_CM_COMPARE_SIZE
);
471 * Trivial helpers to strip endian annotation and compare; the
472 * endianness doesn't actually matter since we just need a stable
473 * order for the RB tree.
475 static int be32_lt(__be32 a
, __be32 b
)
477 return (__force u32
) a
< (__force u32
) b
;
480 static int be32_gt(__be32 a
, __be32 b
)
482 return (__force u32
) a
> (__force u32
) b
;
485 static int be64_lt(__be64 a
, __be64 b
)
487 return (__force u64
) a
< (__force u64
) b
;
490 static int be64_gt(__be64 a
, __be64 b
)
492 return (__force u64
) a
> (__force u64
) b
;
495 static struct cm_id_private
* cm_insert_listen(struct cm_id_private
*cm_id_priv
)
497 struct rb_node
**link
= &cm
.listen_service_table
.rb_node
;
498 struct rb_node
*parent
= NULL
;
499 struct cm_id_private
*cur_cm_id_priv
;
500 __be64 service_id
= cm_id_priv
->id
.service_id
;
501 __be64 service_mask
= cm_id_priv
->id
.service_mask
;
506 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
508 data_cmp
= cm_compare_data(cm_id_priv
->compare_data
,
509 cur_cm_id_priv
->compare_data
);
510 if ((cur_cm_id_priv
->id
.service_mask
& service_id
) ==
511 (service_mask
& cur_cm_id_priv
->id
.service_id
) &&
512 (cm_id_priv
->id
.device
== cur_cm_id_priv
->id
.device
) &&
514 return cur_cm_id_priv
;
516 if (cm_id_priv
->id
.device
< cur_cm_id_priv
->id
.device
)
517 link
= &(*link
)->rb_left
;
518 else if (cm_id_priv
->id
.device
> cur_cm_id_priv
->id
.device
)
519 link
= &(*link
)->rb_right
;
520 else if (be64_lt(service_id
, cur_cm_id_priv
->id
.service_id
))
521 link
= &(*link
)->rb_left
;
522 else if (be64_gt(service_id
, cur_cm_id_priv
->id
.service_id
))
523 link
= &(*link
)->rb_right
;
524 else if (data_cmp
< 0)
525 link
= &(*link
)->rb_left
;
527 link
= &(*link
)->rb_right
;
529 rb_link_node(&cm_id_priv
->service_node
, parent
, link
);
530 rb_insert_color(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
534 static struct cm_id_private
* cm_find_listen(struct ib_device
*device
,
538 struct rb_node
*node
= cm
.listen_service_table
.rb_node
;
539 struct cm_id_private
*cm_id_priv
;
543 cm_id_priv
= rb_entry(node
, struct cm_id_private
, service_node
);
544 data_cmp
= cm_compare_private_data(private_data
,
545 cm_id_priv
->compare_data
);
546 if ((cm_id_priv
->id
.service_mask
& service_id
) ==
547 cm_id_priv
->id
.service_id
&&
548 (cm_id_priv
->id
.device
== device
) && !data_cmp
)
551 if (device
< cm_id_priv
->id
.device
)
552 node
= node
->rb_left
;
553 else if (device
> cm_id_priv
->id
.device
)
554 node
= node
->rb_right
;
555 else if (be64_lt(service_id
, cm_id_priv
->id
.service_id
))
556 node
= node
->rb_left
;
557 else if (be64_gt(service_id
, cm_id_priv
->id
.service_id
))
558 node
= node
->rb_right
;
559 else if (data_cmp
< 0)
560 node
= node
->rb_left
;
562 node
= node
->rb_right
;
567 static struct cm_timewait_info
* cm_insert_remote_id(struct cm_timewait_info
570 struct rb_node
**link
= &cm
.remote_id_table
.rb_node
;
571 struct rb_node
*parent
= NULL
;
572 struct cm_timewait_info
*cur_timewait_info
;
573 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
574 __be32 remote_id
= timewait_info
->work
.remote_id
;
578 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
580 if (be32_lt(remote_id
, cur_timewait_info
->work
.remote_id
))
581 link
= &(*link
)->rb_left
;
582 else if (be32_gt(remote_id
, cur_timewait_info
->work
.remote_id
))
583 link
= &(*link
)->rb_right
;
584 else if (be64_lt(remote_ca_guid
, cur_timewait_info
->remote_ca_guid
))
585 link
= &(*link
)->rb_left
;
586 else if (be64_gt(remote_ca_guid
, cur_timewait_info
->remote_ca_guid
))
587 link
= &(*link
)->rb_right
;
589 return cur_timewait_info
;
591 timewait_info
->inserted_remote_id
= 1;
592 rb_link_node(&timewait_info
->remote_id_node
, parent
, link
);
593 rb_insert_color(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
597 static struct cm_timewait_info
* cm_find_remote_id(__be64 remote_ca_guid
,
600 struct rb_node
*node
= cm
.remote_id_table
.rb_node
;
601 struct cm_timewait_info
*timewait_info
;
604 timewait_info
= rb_entry(node
, struct cm_timewait_info
,
606 if (be32_lt(remote_id
, timewait_info
->work
.remote_id
))
607 node
= node
->rb_left
;
608 else if (be32_gt(remote_id
, timewait_info
->work
.remote_id
))
609 node
= node
->rb_right
;
610 else if (be64_lt(remote_ca_guid
, timewait_info
->remote_ca_guid
))
611 node
= node
->rb_left
;
612 else if (be64_gt(remote_ca_guid
, timewait_info
->remote_ca_guid
))
613 node
= node
->rb_right
;
615 return timewait_info
;
620 static struct cm_timewait_info
* cm_insert_remote_qpn(struct cm_timewait_info
623 struct rb_node
**link
= &cm
.remote_qp_table
.rb_node
;
624 struct rb_node
*parent
= NULL
;
625 struct cm_timewait_info
*cur_timewait_info
;
626 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
627 __be32 remote_qpn
= timewait_info
->remote_qpn
;
631 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
633 if (be32_lt(remote_qpn
, cur_timewait_info
->remote_qpn
))
634 link
= &(*link
)->rb_left
;
635 else if (be32_gt(remote_qpn
, cur_timewait_info
->remote_qpn
))
636 link
= &(*link
)->rb_right
;
637 else if (be64_lt(remote_ca_guid
, cur_timewait_info
->remote_ca_guid
))
638 link
= &(*link
)->rb_left
;
639 else if (be64_gt(remote_ca_guid
, cur_timewait_info
->remote_ca_guid
))
640 link
= &(*link
)->rb_right
;
642 return cur_timewait_info
;
644 timewait_info
->inserted_remote_qp
= 1;
645 rb_link_node(&timewait_info
->remote_qp_node
, parent
, link
);
646 rb_insert_color(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
650 static struct cm_id_private
* cm_insert_remote_sidr(struct cm_id_private
653 struct rb_node
**link
= &cm
.remote_sidr_table
.rb_node
;
654 struct rb_node
*parent
= NULL
;
655 struct cm_id_private
*cur_cm_id_priv
;
656 union ib_gid
*port_gid
= &cm_id_priv
->av
.dgid
;
657 __be32 remote_id
= cm_id_priv
->id
.remote_id
;
661 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
663 if (be32_lt(remote_id
, cur_cm_id_priv
->id
.remote_id
))
664 link
= &(*link
)->rb_left
;
665 else if (be32_gt(remote_id
, cur_cm_id_priv
->id
.remote_id
))
666 link
= &(*link
)->rb_right
;
669 cmp
= memcmp(port_gid
, &cur_cm_id_priv
->av
.dgid
,
672 link
= &(*link
)->rb_left
;
674 link
= &(*link
)->rb_right
;
676 return cur_cm_id_priv
;
679 rb_link_node(&cm_id_priv
->sidr_id_node
, parent
, link
);
680 rb_insert_color(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
684 static void cm_reject_sidr_req(struct cm_id_private
*cm_id_priv
,
685 enum ib_cm_sidr_status status
)
687 struct ib_cm_sidr_rep_param param
;
689 memset(¶m
, 0, sizeof param
);
690 param
.status
= status
;
691 ib_send_cm_sidr_rep(&cm_id_priv
->id
, ¶m
);
694 struct ib_cm_id
*ib_create_cm_id(struct ib_device
*device
,
695 ib_cm_handler cm_handler
,
698 struct cm_id_private
*cm_id_priv
;
701 cm_id_priv
= kzalloc(sizeof *cm_id_priv
, GFP_KERNEL
);
703 return ERR_PTR(-ENOMEM
);
705 cm_id_priv
->id
.state
= IB_CM_IDLE
;
706 cm_id_priv
->id
.device
= device
;
707 cm_id_priv
->id
.cm_handler
= cm_handler
;
708 cm_id_priv
->id
.context
= context
;
709 cm_id_priv
->id
.remote_cm_qpn
= 1;
710 ret
= cm_alloc_id(cm_id_priv
);
714 spin_lock_init(&cm_id_priv
->lock
);
715 init_completion(&cm_id_priv
->comp
);
716 INIT_LIST_HEAD(&cm_id_priv
->work_list
);
717 atomic_set(&cm_id_priv
->work_count
, -1);
718 atomic_set(&cm_id_priv
->refcount
, 1);
719 return &cm_id_priv
->id
;
723 return ERR_PTR(-ENOMEM
);
725 EXPORT_SYMBOL(ib_create_cm_id
);
727 static struct cm_work
* cm_dequeue_work(struct cm_id_private
*cm_id_priv
)
729 struct cm_work
*work
;
731 if (list_empty(&cm_id_priv
->work_list
))
734 work
= list_entry(cm_id_priv
->work_list
.next
, struct cm_work
, list
);
735 list_del(&work
->list
);
739 static void cm_free_work(struct cm_work
*work
)
741 if (work
->mad_recv_wc
)
742 ib_free_recv_mad(work
->mad_recv_wc
);
746 static inline int cm_convert_to_ms(int iba_time
)
748 /* approximate conversion to ms from 4.096us x 2^iba_time */
749 return 1 << max(iba_time
- 8, 0);
753 * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
754 * Because of how ack_timeout is stored, adding one doubles the timeout.
755 * To avoid large timeouts, select the max(ack_delay, life_time + 1), and
756 * increment it (round up) only if the other is within 50%.
758 static u8
cm_ack_timeout(u8 ca_ack_delay
, u8 packet_life_time
)
760 int ack_timeout
= packet_life_time
+ 1;
762 if (ack_timeout
>= ca_ack_delay
)
763 ack_timeout
+= (ca_ack_delay
>= (ack_timeout
- 1));
765 ack_timeout
= ca_ack_delay
+
766 (ack_timeout
>= (ca_ack_delay
- 1));
768 return min(31, ack_timeout
);
771 static void cm_cleanup_timewait(struct cm_timewait_info
*timewait_info
)
773 if (timewait_info
->inserted_remote_id
) {
774 rb_erase(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
775 timewait_info
->inserted_remote_id
= 0;
778 if (timewait_info
->inserted_remote_qp
) {
779 rb_erase(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
780 timewait_info
->inserted_remote_qp
= 0;
784 static struct cm_timewait_info
* cm_create_timewait_info(__be32 local_id
)
786 struct cm_timewait_info
*timewait_info
;
788 timewait_info
= kzalloc(sizeof *timewait_info
, GFP_KERNEL
);
790 return ERR_PTR(-ENOMEM
);
792 timewait_info
->work
.local_id
= local_id
;
793 INIT_DELAYED_WORK(&timewait_info
->work
.work
, cm_work_handler
);
794 timewait_info
->work
.cm_event
.event
= IB_CM_TIMEWAIT_EXIT
;
795 return timewait_info
;
798 static void cm_enter_timewait(struct cm_id_private
*cm_id_priv
)
803 spin_lock_irqsave(&cm
.lock
, flags
);
804 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
805 list_add_tail(&cm_id_priv
->timewait_info
->list
, &cm
.timewait_list
);
806 spin_unlock_irqrestore(&cm
.lock
, flags
);
809 * The cm_id could be destroyed by the user before we exit timewait.
810 * To protect against this, we search for the cm_id after exiting
811 * timewait before notifying the user that we've exited timewait.
813 cm_id_priv
->id
.state
= IB_CM_TIMEWAIT
;
814 wait_time
= cm_convert_to_ms(cm_id_priv
->av
.timeout
);
815 queue_delayed_work(cm
.wq
, &cm_id_priv
->timewait_info
->work
.work
,
816 msecs_to_jiffies(wait_time
));
817 cm_id_priv
->timewait_info
= NULL
;
820 static void cm_reset_to_idle(struct cm_id_private
*cm_id_priv
)
824 cm_id_priv
->id
.state
= IB_CM_IDLE
;
825 if (cm_id_priv
->timewait_info
) {
826 spin_lock_irqsave(&cm
.lock
, flags
);
827 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
828 spin_unlock_irqrestore(&cm
.lock
, flags
);
829 kfree(cm_id_priv
->timewait_info
);
830 cm_id_priv
->timewait_info
= NULL
;
834 static void cm_destroy_id(struct ib_cm_id
*cm_id
, int err
)
836 struct cm_id_private
*cm_id_priv
;
837 struct cm_work
*work
;
839 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
841 spin_lock_irq(&cm_id_priv
->lock
);
842 switch (cm_id
->state
) {
844 cm_id
->state
= IB_CM_IDLE
;
845 spin_unlock_irq(&cm_id_priv
->lock
);
846 spin_lock_irq(&cm
.lock
);
847 rb_erase(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
848 spin_unlock_irq(&cm
.lock
);
850 case IB_CM_SIDR_REQ_SENT
:
851 cm_id
->state
= IB_CM_IDLE
;
852 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
853 spin_unlock_irq(&cm_id_priv
->lock
);
855 case IB_CM_SIDR_REQ_RCVD
:
856 spin_unlock_irq(&cm_id_priv
->lock
);
857 cm_reject_sidr_req(cm_id_priv
, IB_SIDR_REJECT
);
860 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
861 spin_unlock_irq(&cm_id_priv
->lock
);
862 ib_send_cm_rej(cm_id
, IB_CM_REJ_TIMEOUT
,
863 &cm_id_priv
->id
.device
->node_guid
,
864 sizeof cm_id_priv
->id
.device
->node_guid
,
868 if (err
== -ENOMEM
) {
869 /* Do not reject to allow future retries. */
870 cm_reset_to_idle(cm_id_priv
);
871 spin_unlock_irq(&cm_id_priv
->lock
);
873 spin_unlock_irq(&cm_id_priv
->lock
);
874 ib_send_cm_rej(cm_id
, IB_CM_REJ_CONSUMER_DEFINED
,
878 case IB_CM_MRA_REQ_RCVD
:
880 case IB_CM_MRA_REP_RCVD
:
881 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
883 case IB_CM_MRA_REQ_SENT
:
885 case IB_CM_MRA_REP_SENT
:
886 spin_unlock_irq(&cm_id_priv
->lock
);
887 ib_send_cm_rej(cm_id
, IB_CM_REJ_CONSUMER_DEFINED
,
890 case IB_CM_ESTABLISHED
:
891 spin_unlock_irq(&cm_id_priv
->lock
);
892 if (cm_id_priv
->qp_type
== IB_QPT_XRC_TGT
)
894 ib_send_cm_dreq(cm_id
, NULL
, 0);
896 case IB_CM_DREQ_SENT
:
897 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
898 cm_enter_timewait(cm_id_priv
);
899 spin_unlock_irq(&cm_id_priv
->lock
);
901 case IB_CM_DREQ_RCVD
:
902 spin_unlock_irq(&cm_id_priv
->lock
);
903 ib_send_cm_drep(cm_id
, NULL
, 0);
906 spin_unlock_irq(&cm_id_priv
->lock
);
910 cm_free_id(cm_id
->local_id
);
911 cm_deref_id(cm_id_priv
);
912 wait_for_completion(&cm_id_priv
->comp
);
913 while ((work
= cm_dequeue_work(cm_id_priv
)) != NULL
)
915 kfree(cm_id_priv
->compare_data
);
916 kfree(cm_id_priv
->private_data
);
920 void ib_destroy_cm_id(struct ib_cm_id
*cm_id
)
922 cm_destroy_id(cm_id
, 0);
924 EXPORT_SYMBOL(ib_destroy_cm_id
);
926 int ib_cm_listen(struct ib_cm_id
*cm_id
, __be64 service_id
, __be64 service_mask
,
927 struct ib_cm_compare_data
*compare_data
)
929 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
933 service_mask
= service_mask
? service_mask
: ~cpu_to_be64(0);
934 service_id
&= service_mask
;
935 if ((service_id
& IB_SERVICE_ID_AGN_MASK
) == IB_CM_ASSIGN_SERVICE_ID
&&
936 (service_id
!= IB_CM_ASSIGN_SERVICE_ID
))
939 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
940 if (cm_id
->state
!= IB_CM_IDLE
)
944 cm_id_priv
->compare_data
= kzalloc(sizeof *compare_data
,
946 if (!cm_id_priv
->compare_data
)
948 cm_mask_copy(cm_id_priv
->compare_data
->data
,
949 compare_data
->data
, compare_data
->mask
);
950 memcpy(cm_id_priv
->compare_data
->mask
, compare_data
->mask
,
954 cm_id
->state
= IB_CM_LISTEN
;
956 spin_lock_irqsave(&cm
.lock
, flags
);
957 if (service_id
== IB_CM_ASSIGN_SERVICE_ID
) {
958 cm_id
->service_id
= cpu_to_be64(cm
.listen_service_id
++);
959 cm_id
->service_mask
= ~cpu_to_be64(0);
961 cm_id
->service_id
= service_id
;
962 cm_id
->service_mask
= service_mask
;
964 cur_cm_id_priv
= cm_insert_listen(cm_id_priv
);
965 spin_unlock_irqrestore(&cm
.lock
, flags
);
967 if (cur_cm_id_priv
) {
968 cm_id
->state
= IB_CM_IDLE
;
969 kfree(cm_id_priv
->compare_data
);
970 cm_id_priv
->compare_data
= NULL
;
975 EXPORT_SYMBOL(ib_cm_listen
);
977 static __be64
cm_form_tid(struct cm_id_private
*cm_id_priv
,
978 enum cm_msg_sequence msg_seq
)
982 hi_tid
= ((u64
) cm_id_priv
->av
.port
->mad_agent
->hi_tid
) << 32;
983 low_tid
= (u64
) ((__force u32
)cm_id_priv
->id
.local_id
|
985 return cpu_to_be64(hi_tid
| low_tid
);
988 static void cm_format_mad_hdr(struct ib_mad_hdr
*hdr
,
989 __be16 attr_id
, __be64 tid
)
991 hdr
->base_version
= IB_MGMT_BASE_VERSION
;
992 hdr
->mgmt_class
= IB_MGMT_CLASS_CM
;
993 hdr
->class_version
= IB_CM_CLASS_VERSION
;
994 hdr
->method
= IB_MGMT_METHOD_SEND
;
995 hdr
->attr_id
= attr_id
;
999 static void cm_format_req(struct cm_req_msg
*req_msg
,
1000 struct cm_id_private
*cm_id_priv
,
1001 struct ib_cm_req_param
*param
)
1003 struct ib_sa_path_rec
*pri_path
= param
->primary_path
;
1004 struct ib_sa_path_rec
*alt_path
= param
->alternate_path
;
1006 cm_format_mad_hdr(&req_msg
->hdr
, CM_REQ_ATTR_ID
,
1007 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_REQ
));
1009 req_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1010 req_msg
->service_id
= param
->service_id
;
1011 req_msg
->local_ca_guid
= cm_id_priv
->id
.device
->node_guid
;
1012 cm_req_set_local_qpn(req_msg
, cpu_to_be32(param
->qp_num
));
1013 cm_req_set_init_depth(req_msg
, param
->initiator_depth
);
1014 cm_req_set_remote_resp_timeout(req_msg
,
1015 param
->remote_cm_response_timeout
);
1016 cm_req_set_qp_type(req_msg
, param
->qp_type
);
1017 cm_req_set_flow_ctrl(req_msg
, param
->flow_control
);
1018 cm_req_set_starting_psn(req_msg
, cpu_to_be32(param
->starting_psn
));
1019 cm_req_set_local_resp_timeout(req_msg
,
1020 param
->local_cm_response_timeout
);
1021 req_msg
->pkey
= param
->primary_path
->pkey
;
1022 cm_req_set_path_mtu(req_msg
, param
->primary_path
->mtu
);
1023 cm_req_set_max_cm_retries(req_msg
, param
->max_cm_retries
);
1025 if (param
->qp_type
!= IB_QPT_XRC_INI
) {
1026 cm_req_set_resp_res(req_msg
, param
->responder_resources
);
1027 cm_req_set_retry_count(req_msg
, param
->retry_count
);
1028 cm_req_set_rnr_retry_count(req_msg
, param
->rnr_retry_count
);
1029 cm_req_set_srq(req_msg
, param
->srq
);
1032 if (pri_path
->hop_limit
<= 1) {
1033 req_msg
->primary_local_lid
= pri_path
->slid
;
1034 req_msg
->primary_remote_lid
= pri_path
->dlid
;
1036 /* Work-around until there's a way to obtain remote LID info */
1037 req_msg
->primary_local_lid
= IB_LID_PERMISSIVE
;
1038 req_msg
->primary_remote_lid
= IB_LID_PERMISSIVE
;
1040 req_msg
->primary_local_gid
= pri_path
->sgid
;
1041 req_msg
->primary_remote_gid
= pri_path
->dgid
;
1042 cm_req_set_primary_flow_label(req_msg
, pri_path
->flow_label
);
1043 cm_req_set_primary_packet_rate(req_msg
, pri_path
->rate
);
1044 req_msg
->primary_traffic_class
= pri_path
->traffic_class
;
1045 req_msg
->primary_hop_limit
= pri_path
->hop_limit
;
1046 cm_req_set_primary_sl(req_msg
, pri_path
->sl
);
1047 cm_req_set_primary_subnet_local(req_msg
, (pri_path
->hop_limit
<= 1));
1048 cm_req_set_primary_local_ack_timeout(req_msg
,
1049 cm_ack_timeout(cm_id_priv
->av
.port
->cm_dev
->ack_delay
,
1050 pri_path
->packet_life_time
));
1053 if (alt_path
->hop_limit
<= 1) {
1054 req_msg
->alt_local_lid
= alt_path
->slid
;
1055 req_msg
->alt_remote_lid
= alt_path
->dlid
;
1057 req_msg
->alt_local_lid
= IB_LID_PERMISSIVE
;
1058 req_msg
->alt_remote_lid
= IB_LID_PERMISSIVE
;
1060 req_msg
->alt_local_gid
= alt_path
->sgid
;
1061 req_msg
->alt_remote_gid
= alt_path
->dgid
;
1062 cm_req_set_alt_flow_label(req_msg
,
1063 alt_path
->flow_label
);
1064 cm_req_set_alt_packet_rate(req_msg
, alt_path
->rate
);
1065 req_msg
->alt_traffic_class
= alt_path
->traffic_class
;
1066 req_msg
->alt_hop_limit
= alt_path
->hop_limit
;
1067 cm_req_set_alt_sl(req_msg
, alt_path
->sl
);
1068 cm_req_set_alt_subnet_local(req_msg
, (alt_path
->hop_limit
<= 1));
1069 cm_req_set_alt_local_ack_timeout(req_msg
,
1070 cm_ack_timeout(cm_id_priv
->av
.port
->cm_dev
->ack_delay
,
1071 alt_path
->packet_life_time
));
1074 if (param
->private_data
&& param
->private_data_len
)
1075 memcpy(req_msg
->private_data
, param
->private_data
,
1076 param
->private_data_len
);
1079 static int cm_validate_req_param(struct ib_cm_req_param
*param
)
1081 /* peer-to-peer not supported */
1082 if (param
->peer_to_peer
)
1085 if (!param
->primary_path
)
1088 if (param
->qp_type
!= IB_QPT_RC
&& param
->qp_type
!= IB_QPT_UC
&&
1089 param
->qp_type
!= IB_QPT_XRC_INI
)
1092 if (param
->private_data
&&
1093 param
->private_data_len
> IB_CM_REQ_PRIVATE_DATA_SIZE
)
1096 if (param
->alternate_path
&&
1097 (param
->alternate_path
->pkey
!= param
->primary_path
->pkey
||
1098 param
->alternate_path
->mtu
!= param
->primary_path
->mtu
))
1104 int ib_send_cm_req(struct ib_cm_id
*cm_id
,
1105 struct ib_cm_req_param
*param
)
1107 struct cm_id_private
*cm_id_priv
;
1108 struct cm_req_msg
*req_msg
;
1109 unsigned long flags
;
1112 ret
= cm_validate_req_param(param
);
1116 /* Verify that we're not in timewait. */
1117 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1118 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1119 if (cm_id
->state
!= IB_CM_IDLE
) {
1120 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1124 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1126 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
1128 if (IS_ERR(cm_id_priv
->timewait_info
)) {
1129 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
1133 ret
= cm_init_av_by_path(param
->primary_path
, &cm_id_priv
->av
);
1136 if (param
->alternate_path
) {
1137 ret
= cm_init_av_by_path(param
->alternate_path
,
1138 &cm_id_priv
->alt_av
);
1142 cm_id
->service_id
= param
->service_id
;
1143 cm_id
->service_mask
= ~cpu_to_be64(0);
1144 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1145 param
->primary_path
->packet_life_time
) * 2 +
1147 param
->remote_cm_response_timeout
);
1148 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
1149 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1150 cm_id_priv
->responder_resources
= param
->responder_resources
;
1151 cm_id_priv
->retry_count
= param
->retry_count
;
1152 cm_id_priv
->path_mtu
= param
->primary_path
->mtu
;
1153 cm_id_priv
->pkey
= param
->primary_path
->pkey
;
1154 cm_id_priv
->qp_type
= param
->qp_type
;
1156 ret
= cm_alloc_msg(cm_id_priv
, &cm_id_priv
->msg
);
1160 req_msg
= (struct cm_req_msg
*) cm_id_priv
->msg
->mad
;
1161 cm_format_req(req_msg
, cm_id_priv
, param
);
1162 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1163 cm_id_priv
->msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1164 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long) IB_CM_REQ_SENT
;
1166 cm_id_priv
->local_qpn
= cm_req_get_local_qpn(req_msg
);
1167 cm_id_priv
->rq_psn
= cm_req_get_starting_psn(req_msg
);
1169 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1170 ret
= ib_post_send_mad(cm_id_priv
->msg
, NULL
);
1172 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1175 BUG_ON(cm_id
->state
!= IB_CM_IDLE
);
1176 cm_id
->state
= IB_CM_REQ_SENT
;
1177 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1180 error2
: cm_free_msg(cm_id_priv
->msg
);
1181 error1
: kfree(cm_id_priv
->timewait_info
);
1184 EXPORT_SYMBOL(ib_send_cm_req
);
1186 static int cm_issue_rej(struct cm_port
*port
,
1187 struct ib_mad_recv_wc
*mad_recv_wc
,
1188 enum ib_cm_rej_reason reason
,
1189 enum cm_msg_response msg_rejected
,
1190 void *ari
, u8 ari_length
)
1192 struct ib_mad_send_buf
*msg
= NULL
;
1193 struct cm_rej_msg
*rej_msg
, *rcv_msg
;
1196 ret
= cm_alloc_response_msg(port
, mad_recv_wc
, &msg
);
1200 /* We just need common CM header information. Cast to any message. */
1201 rcv_msg
= (struct cm_rej_msg
*) mad_recv_wc
->recv_buf
.mad
;
1202 rej_msg
= (struct cm_rej_msg
*) msg
->mad
;
1204 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, rcv_msg
->hdr
.tid
);
1205 rej_msg
->remote_comm_id
= rcv_msg
->local_comm_id
;
1206 rej_msg
->local_comm_id
= rcv_msg
->remote_comm_id
;
1207 cm_rej_set_msg_rejected(rej_msg
, msg_rejected
);
1208 rej_msg
->reason
= cpu_to_be16(reason
);
1210 if (ari
&& ari_length
) {
1211 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1212 memcpy(rej_msg
->ari
, ari
, ari_length
);
1215 ret
= ib_post_send_mad(msg
, NULL
);
1222 static inline int cm_is_active_peer(__be64 local_ca_guid
, __be64 remote_ca_guid
,
1223 __be32 local_qpn
, __be32 remote_qpn
)
1225 return (be64_to_cpu(local_ca_guid
) > be64_to_cpu(remote_ca_guid
) ||
1226 ((local_ca_guid
== remote_ca_guid
) &&
1227 (be32_to_cpu(local_qpn
) > be32_to_cpu(remote_qpn
))));
1230 static void cm_format_paths_from_req(struct cm_req_msg
*req_msg
,
1231 struct ib_sa_path_rec
*primary_path
,
1232 struct ib_sa_path_rec
*alt_path
)
1234 memset(primary_path
, 0, sizeof *primary_path
);
1235 primary_path
->dgid
= req_msg
->primary_local_gid
;
1236 primary_path
->sgid
= req_msg
->primary_remote_gid
;
1237 primary_path
->dlid
= req_msg
->primary_local_lid
;
1238 primary_path
->slid
= req_msg
->primary_remote_lid
;
1239 primary_path
->flow_label
= cm_req_get_primary_flow_label(req_msg
);
1240 primary_path
->hop_limit
= req_msg
->primary_hop_limit
;
1241 primary_path
->traffic_class
= req_msg
->primary_traffic_class
;
1242 primary_path
->reversible
= 1;
1243 primary_path
->pkey
= req_msg
->pkey
;
1244 primary_path
->sl
= cm_req_get_primary_sl(req_msg
);
1245 primary_path
->mtu_selector
= IB_SA_EQ
;
1246 primary_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1247 primary_path
->rate_selector
= IB_SA_EQ
;
1248 primary_path
->rate
= cm_req_get_primary_packet_rate(req_msg
);
1249 primary_path
->packet_life_time_selector
= IB_SA_EQ
;
1250 primary_path
->packet_life_time
=
1251 cm_req_get_primary_local_ack_timeout(req_msg
);
1252 primary_path
->packet_life_time
-= (primary_path
->packet_life_time
> 0);
1254 if (req_msg
->alt_local_lid
) {
1255 memset(alt_path
, 0, sizeof *alt_path
);
1256 alt_path
->dgid
= req_msg
->alt_local_gid
;
1257 alt_path
->sgid
= req_msg
->alt_remote_gid
;
1258 alt_path
->dlid
= req_msg
->alt_local_lid
;
1259 alt_path
->slid
= req_msg
->alt_remote_lid
;
1260 alt_path
->flow_label
= cm_req_get_alt_flow_label(req_msg
);
1261 alt_path
->hop_limit
= req_msg
->alt_hop_limit
;
1262 alt_path
->traffic_class
= req_msg
->alt_traffic_class
;
1263 alt_path
->reversible
= 1;
1264 alt_path
->pkey
= req_msg
->pkey
;
1265 alt_path
->sl
= cm_req_get_alt_sl(req_msg
);
1266 alt_path
->mtu_selector
= IB_SA_EQ
;
1267 alt_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1268 alt_path
->rate_selector
= IB_SA_EQ
;
1269 alt_path
->rate
= cm_req_get_alt_packet_rate(req_msg
);
1270 alt_path
->packet_life_time_selector
= IB_SA_EQ
;
1271 alt_path
->packet_life_time
=
1272 cm_req_get_alt_local_ack_timeout(req_msg
);
1273 alt_path
->packet_life_time
-= (alt_path
->packet_life_time
> 0);
1277 static void cm_format_req_event(struct cm_work
*work
,
1278 struct cm_id_private
*cm_id_priv
,
1279 struct ib_cm_id
*listen_id
)
1281 struct cm_req_msg
*req_msg
;
1282 struct ib_cm_req_event_param
*param
;
1284 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1285 param
= &work
->cm_event
.param
.req_rcvd
;
1286 param
->listen_id
= listen_id
;
1287 param
->port
= cm_id_priv
->av
.port
->port_num
;
1288 param
->primary_path
= &work
->path
[0];
1289 if (req_msg
->alt_local_lid
)
1290 param
->alternate_path
= &work
->path
[1];
1292 param
->alternate_path
= NULL
;
1293 param
->remote_ca_guid
= req_msg
->local_ca_guid
;
1294 param
->remote_qkey
= be32_to_cpu(req_msg
->local_qkey
);
1295 param
->remote_qpn
= be32_to_cpu(cm_req_get_local_qpn(req_msg
));
1296 param
->qp_type
= cm_req_get_qp_type(req_msg
);
1297 param
->starting_psn
= be32_to_cpu(cm_req_get_starting_psn(req_msg
));
1298 param
->responder_resources
= cm_req_get_init_depth(req_msg
);
1299 param
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1300 param
->local_cm_response_timeout
=
1301 cm_req_get_remote_resp_timeout(req_msg
);
1302 param
->flow_control
= cm_req_get_flow_ctrl(req_msg
);
1303 param
->remote_cm_response_timeout
=
1304 cm_req_get_local_resp_timeout(req_msg
);
1305 param
->retry_count
= cm_req_get_retry_count(req_msg
);
1306 param
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1307 param
->srq
= cm_req_get_srq(req_msg
);
1308 work
->cm_event
.private_data
= &req_msg
->private_data
;
1311 static void cm_process_work(struct cm_id_private
*cm_id_priv
,
1312 struct cm_work
*work
)
1316 /* We will typically only have the current event to report. */
1317 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &work
->cm_event
);
1320 while (!ret
&& !atomic_add_negative(-1, &cm_id_priv
->work_count
)) {
1321 spin_lock_irq(&cm_id_priv
->lock
);
1322 work
= cm_dequeue_work(cm_id_priv
);
1323 spin_unlock_irq(&cm_id_priv
->lock
);
1325 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
,
1329 cm_deref_id(cm_id_priv
);
1331 cm_destroy_id(&cm_id_priv
->id
, ret
);
1334 static void cm_format_mra(struct cm_mra_msg
*mra_msg
,
1335 struct cm_id_private
*cm_id_priv
,
1336 enum cm_msg_response msg_mraed
, u8 service_timeout
,
1337 const void *private_data
, u8 private_data_len
)
1339 cm_format_mad_hdr(&mra_msg
->hdr
, CM_MRA_ATTR_ID
, cm_id_priv
->tid
);
1340 cm_mra_set_msg_mraed(mra_msg
, msg_mraed
);
1341 mra_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1342 mra_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1343 cm_mra_set_service_timeout(mra_msg
, service_timeout
);
1345 if (private_data
&& private_data_len
)
1346 memcpy(mra_msg
->private_data
, private_data
, private_data_len
);
1349 static void cm_format_rej(struct cm_rej_msg
*rej_msg
,
1350 struct cm_id_private
*cm_id_priv
,
1351 enum ib_cm_rej_reason reason
,
1354 const void *private_data
,
1355 u8 private_data_len
)
1357 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, cm_id_priv
->tid
);
1358 rej_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1360 switch(cm_id_priv
->id
.state
) {
1361 case IB_CM_REQ_RCVD
:
1362 rej_msg
->local_comm_id
= 0;
1363 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1365 case IB_CM_MRA_REQ_SENT
:
1366 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1367 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1369 case IB_CM_REP_RCVD
:
1370 case IB_CM_MRA_REP_SENT
:
1371 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1372 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REP
);
1375 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1376 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_OTHER
);
1380 rej_msg
->reason
= cpu_to_be16(reason
);
1381 if (ari
&& ari_length
) {
1382 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1383 memcpy(rej_msg
->ari
, ari
, ari_length
);
1386 if (private_data
&& private_data_len
)
1387 memcpy(rej_msg
->private_data
, private_data
, private_data_len
);
1390 static void cm_dup_req_handler(struct cm_work
*work
,
1391 struct cm_id_private
*cm_id_priv
)
1393 struct ib_mad_send_buf
*msg
= NULL
;
1396 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
1397 counter
[CM_REQ_COUNTER
]);
1399 /* Quick state check to discard duplicate REQs. */
1400 if (cm_id_priv
->id
.state
== IB_CM_REQ_RCVD
)
1403 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1407 spin_lock_irq(&cm_id_priv
->lock
);
1408 switch (cm_id_priv
->id
.state
) {
1409 case IB_CM_MRA_REQ_SENT
:
1410 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1411 CM_MSG_RESPONSE_REQ
, cm_id_priv
->service_timeout
,
1412 cm_id_priv
->private_data
,
1413 cm_id_priv
->private_data_len
);
1415 case IB_CM_TIMEWAIT
:
1416 cm_format_rej((struct cm_rej_msg
*) msg
->mad
, cm_id_priv
,
1417 IB_CM_REJ_STALE_CONN
, NULL
, 0, NULL
, 0);
1422 spin_unlock_irq(&cm_id_priv
->lock
);
1424 ret
= ib_post_send_mad(msg
, NULL
);
1429 unlock
: spin_unlock_irq(&cm_id_priv
->lock
);
1430 free
: cm_free_msg(msg
);
1433 static struct cm_id_private
* cm_match_req(struct cm_work
*work
,
1434 struct cm_id_private
*cm_id_priv
)
1436 struct cm_id_private
*listen_cm_id_priv
, *cur_cm_id_priv
;
1437 struct cm_timewait_info
*timewait_info
;
1438 struct cm_req_msg
*req_msg
;
1440 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1442 /* Check for possible duplicate REQ. */
1443 spin_lock_irq(&cm
.lock
);
1444 timewait_info
= cm_insert_remote_id(cm_id_priv
->timewait_info
);
1445 if (timewait_info
) {
1446 cur_cm_id_priv
= cm_get_id(timewait_info
->work
.local_id
,
1447 timewait_info
->work
.remote_id
);
1448 spin_unlock_irq(&cm
.lock
);
1449 if (cur_cm_id_priv
) {
1450 cm_dup_req_handler(work
, cur_cm_id_priv
);
1451 cm_deref_id(cur_cm_id_priv
);
1456 /* Check for stale connections. */
1457 timewait_info
= cm_insert_remote_qpn(cm_id_priv
->timewait_info
);
1458 if (timewait_info
) {
1459 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1460 spin_unlock_irq(&cm
.lock
);
1461 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1462 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REQ
,
1467 /* Find matching listen request. */
1468 listen_cm_id_priv
= cm_find_listen(cm_id_priv
->id
.device
,
1469 req_msg
->service_id
,
1470 req_msg
->private_data
);
1471 if (!listen_cm_id_priv
) {
1472 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1473 spin_unlock_irq(&cm
.lock
);
1474 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1475 IB_CM_REJ_INVALID_SERVICE_ID
, CM_MSG_RESPONSE_REQ
,
1479 atomic_inc(&listen_cm_id_priv
->refcount
);
1480 atomic_inc(&cm_id_priv
->refcount
);
1481 cm_id_priv
->id
.state
= IB_CM_REQ_RCVD
;
1482 atomic_inc(&cm_id_priv
->work_count
);
1483 spin_unlock_irq(&cm
.lock
);
1485 return listen_cm_id_priv
;
1489 * Work-around for inter-subnet connections. If the LIDs are permissive,
1490 * we need to override the LID/SL data in the REQ with the LID information
1491 * in the work completion.
1493 static void cm_process_routed_req(struct cm_req_msg
*req_msg
, struct ib_wc
*wc
)
1495 if (!cm_req_get_primary_subnet_local(req_msg
)) {
1496 if (req_msg
->primary_local_lid
== IB_LID_PERMISSIVE
) {
1497 req_msg
->primary_local_lid
= cpu_to_be16(wc
->slid
);
1498 cm_req_set_primary_sl(req_msg
, wc
->sl
);
1501 if (req_msg
->primary_remote_lid
== IB_LID_PERMISSIVE
)
1502 req_msg
->primary_remote_lid
= cpu_to_be16(wc
->dlid_path_bits
);
1505 if (!cm_req_get_alt_subnet_local(req_msg
)) {
1506 if (req_msg
->alt_local_lid
== IB_LID_PERMISSIVE
) {
1507 req_msg
->alt_local_lid
= cpu_to_be16(wc
->slid
);
1508 cm_req_set_alt_sl(req_msg
, wc
->sl
);
1511 if (req_msg
->alt_remote_lid
== IB_LID_PERMISSIVE
)
1512 req_msg
->alt_remote_lid
= cpu_to_be16(wc
->dlid_path_bits
);
1516 static int cm_req_handler(struct cm_work
*work
)
1518 struct ib_cm_id
*cm_id
;
1519 struct cm_id_private
*cm_id_priv
, *listen_cm_id_priv
;
1520 struct cm_req_msg
*req_msg
;
1523 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1525 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->ib_device
, NULL
, NULL
);
1527 return PTR_ERR(cm_id
);
1529 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1530 cm_id_priv
->id
.remote_id
= req_msg
->local_comm_id
;
1531 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
1532 work
->mad_recv_wc
->recv_buf
.grh
,
1534 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
1536 if (IS_ERR(cm_id_priv
->timewait_info
)) {
1537 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
1540 cm_id_priv
->timewait_info
->work
.remote_id
= req_msg
->local_comm_id
;
1541 cm_id_priv
->timewait_info
->remote_ca_guid
= req_msg
->local_ca_guid
;
1542 cm_id_priv
->timewait_info
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1544 listen_cm_id_priv
= cm_match_req(work
, cm_id_priv
);
1545 if (!listen_cm_id_priv
) {
1547 kfree(cm_id_priv
->timewait_info
);
1551 cm_id_priv
->id
.cm_handler
= listen_cm_id_priv
->id
.cm_handler
;
1552 cm_id_priv
->id
.context
= listen_cm_id_priv
->id
.context
;
1553 cm_id_priv
->id
.service_id
= req_msg
->service_id
;
1554 cm_id_priv
->id
.service_mask
= ~cpu_to_be64(0);
1556 cm_process_routed_req(req_msg
, work
->mad_recv_wc
->wc
);
1557 cm_format_paths_from_req(req_msg
, &work
->path
[0], &work
->path
[1]);
1558 ret
= cm_init_av_by_path(&work
->path
[0], &cm_id_priv
->av
);
1560 ib_get_cached_gid(work
->port
->cm_dev
->ib_device
,
1561 work
->port
->port_num
, 0, &work
->path
[0].sgid
);
1562 ib_send_cm_rej(cm_id
, IB_CM_REJ_INVALID_GID
,
1563 &work
->path
[0].sgid
, sizeof work
->path
[0].sgid
,
1567 if (req_msg
->alt_local_lid
) {
1568 ret
= cm_init_av_by_path(&work
->path
[1], &cm_id_priv
->alt_av
);
1570 ib_send_cm_rej(cm_id
, IB_CM_REJ_INVALID_ALT_GID
,
1571 &work
->path
[0].sgid
,
1572 sizeof work
->path
[0].sgid
, NULL
, 0);
1576 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1577 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1578 cm_req_get_local_resp_timeout(req_msg
));
1579 cm_id_priv
->max_cm_retries
= cm_req_get_max_cm_retries(req_msg
);
1580 cm_id_priv
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1581 cm_id_priv
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1582 cm_id_priv
->responder_resources
= cm_req_get_init_depth(req_msg
);
1583 cm_id_priv
->path_mtu
= cm_req_get_path_mtu(req_msg
);
1584 cm_id_priv
->pkey
= req_msg
->pkey
;
1585 cm_id_priv
->sq_psn
= cm_req_get_starting_psn(req_msg
);
1586 cm_id_priv
->retry_count
= cm_req_get_retry_count(req_msg
);
1587 cm_id_priv
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1588 cm_id_priv
->qp_type
= cm_req_get_qp_type(req_msg
);
1590 cm_format_req_event(work
, cm_id_priv
, &listen_cm_id_priv
->id
);
1591 cm_process_work(cm_id_priv
, work
);
1592 cm_deref_id(listen_cm_id_priv
);
1596 atomic_dec(&cm_id_priv
->refcount
);
1597 cm_deref_id(listen_cm_id_priv
);
1599 ib_destroy_cm_id(cm_id
);
1603 static void cm_format_rep(struct cm_rep_msg
*rep_msg
,
1604 struct cm_id_private
*cm_id_priv
,
1605 struct ib_cm_rep_param
*param
)
1607 cm_format_mad_hdr(&rep_msg
->hdr
, CM_REP_ATTR_ID
, cm_id_priv
->tid
);
1608 rep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1609 rep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1610 cm_rep_set_starting_psn(rep_msg
, cpu_to_be32(param
->starting_psn
));
1611 rep_msg
->resp_resources
= param
->responder_resources
;
1612 cm_rep_set_target_ack_delay(rep_msg
,
1613 cm_id_priv
->av
.port
->cm_dev
->ack_delay
);
1614 cm_rep_set_failover(rep_msg
, param
->failover_accepted
);
1615 cm_rep_set_rnr_retry_count(rep_msg
, param
->rnr_retry_count
);
1616 rep_msg
->local_ca_guid
= cm_id_priv
->id
.device
->node_guid
;
1618 if (cm_id_priv
->qp_type
!= IB_QPT_XRC_TGT
) {
1619 rep_msg
->initiator_depth
= param
->initiator_depth
;
1620 cm_rep_set_flow_ctrl(rep_msg
, param
->flow_control
);
1621 cm_rep_set_srq(rep_msg
, param
->srq
);
1622 cm_rep_set_local_qpn(rep_msg
, cpu_to_be32(param
->qp_num
));
1624 cm_rep_set_srq(rep_msg
, 1);
1625 cm_rep_set_local_eecn(rep_msg
, cpu_to_be32(param
->qp_num
));
1628 if (param
->private_data
&& param
->private_data_len
)
1629 memcpy(rep_msg
->private_data
, param
->private_data
,
1630 param
->private_data_len
);
1633 int ib_send_cm_rep(struct ib_cm_id
*cm_id
,
1634 struct ib_cm_rep_param
*param
)
1636 struct cm_id_private
*cm_id_priv
;
1637 struct ib_mad_send_buf
*msg
;
1638 struct cm_rep_msg
*rep_msg
;
1639 unsigned long flags
;
1642 if (param
->private_data
&&
1643 param
->private_data_len
> IB_CM_REP_PRIVATE_DATA_SIZE
)
1646 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1647 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1648 if (cm_id
->state
!= IB_CM_REQ_RCVD
&&
1649 cm_id
->state
!= IB_CM_MRA_REQ_SENT
) {
1654 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1658 rep_msg
= (struct cm_rep_msg
*) msg
->mad
;
1659 cm_format_rep(rep_msg
, cm_id_priv
, param
);
1660 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1661 msg
->context
[1] = (void *) (unsigned long) IB_CM_REP_SENT
;
1663 ret
= ib_post_send_mad(msg
, NULL
);
1665 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1670 cm_id
->state
= IB_CM_REP_SENT
;
1671 cm_id_priv
->msg
= msg
;
1672 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1673 cm_id_priv
->responder_resources
= param
->responder_resources
;
1674 cm_id_priv
->rq_psn
= cm_rep_get_starting_psn(rep_msg
);
1675 cm_id_priv
->local_qpn
= cpu_to_be32(param
->qp_num
& 0xFFFFFF);
1677 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1680 EXPORT_SYMBOL(ib_send_cm_rep
);
1682 static void cm_format_rtu(struct cm_rtu_msg
*rtu_msg
,
1683 struct cm_id_private
*cm_id_priv
,
1684 const void *private_data
,
1685 u8 private_data_len
)
1687 cm_format_mad_hdr(&rtu_msg
->hdr
, CM_RTU_ATTR_ID
, cm_id_priv
->tid
);
1688 rtu_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1689 rtu_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1691 if (private_data
&& private_data_len
)
1692 memcpy(rtu_msg
->private_data
, private_data
, private_data_len
);
1695 int ib_send_cm_rtu(struct ib_cm_id
*cm_id
,
1696 const void *private_data
,
1697 u8 private_data_len
)
1699 struct cm_id_private
*cm_id_priv
;
1700 struct ib_mad_send_buf
*msg
;
1701 unsigned long flags
;
1705 if (private_data
&& private_data_len
> IB_CM_RTU_PRIVATE_DATA_SIZE
)
1708 data
= cm_copy_private_data(private_data
, private_data_len
);
1710 return PTR_ERR(data
);
1712 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1713 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1714 if (cm_id
->state
!= IB_CM_REP_RCVD
&&
1715 cm_id
->state
!= IB_CM_MRA_REP_SENT
) {
1720 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1724 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1725 private_data
, private_data_len
);
1727 ret
= ib_post_send_mad(msg
, NULL
);
1729 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1735 cm_id
->state
= IB_CM_ESTABLISHED
;
1736 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1737 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1740 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1744 EXPORT_SYMBOL(ib_send_cm_rtu
);
1746 static void cm_format_rep_event(struct cm_work
*work
, enum ib_qp_type qp_type
)
1748 struct cm_rep_msg
*rep_msg
;
1749 struct ib_cm_rep_event_param
*param
;
1751 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1752 param
= &work
->cm_event
.param
.rep_rcvd
;
1753 param
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1754 param
->remote_qkey
= be32_to_cpu(rep_msg
->local_qkey
);
1755 param
->remote_qpn
= be32_to_cpu(cm_rep_get_qpn(rep_msg
, qp_type
));
1756 param
->starting_psn
= be32_to_cpu(cm_rep_get_starting_psn(rep_msg
));
1757 param
->responder_resources
= rep_msg
->initiator_depth
;
1758 param
->initiator_depth
= rep_msg
->resp_resources
;
1759 param
->target_ack_delay
= cm_rep_get_target_ack_delay(rep_msg
);
1760 param
->failover_accepted
= cm_rep_get_failover(rep_msg
);
1761 param
->flow_control
= cm_rep_get_flow_ctrl(rep_msg
);
1762 param
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1763 param
->srq
= cm_rep_get_srq(rep_msg
);
1764 work
->cm_event
.private_data
= &rep_msg
->private_data
;
1767 static void cm_dup_rep_handler(struct cm_work
*work
)
1769 struct cm_id_private
*cm_id_priv
;
1770 struct cm_rep_msg
*rep_msg
;
1771 struct ib_mad_send_buf
*msg
= NULL
;
1774 rep_msg
= (struct cm_rep_msg
*) work
->mad_recv_wc
->recv_buf
.mad
;
1775 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
,
1776 rep_msg
->local_comm_id
);
1780 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
1781 counter
[CM_REP_COUNTER
]);
1782 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1786 spin_lock_irq(&cm_id_priv
->lock
);
1787 if (cm_id_priv
->id
.state
== IB_CM_ESTABLISHED
)
1788 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1789 cm_id_priv
->private_data
,
1790 cm_id_priv
->private_data_len
);
1791 else if (cm_id_priv
->id
.state
== IB_CM_MRA_REP_SENT
)
1792 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1793 CM_MSG_RESPONSE_REP
, cm_id_priv
->service_timeout
,
1794 cm_id_priv
->private_data
,
1795 cm_id_priv
->private_data_len
);
1798 spin_unlock_irq(&cm_id_priv
->lock
);
1800 ret
= ib_post_send_mad(msg
, NULL
);
1805 unlock
: spin_unlock_irq(&cm_id_priv
->lock
);
1806 free
: cm_free_msg(msg
);
1807 deref
: cm_deref_id(cm_id_priv
);
1810 static int cm_rep_handler(struct cm_work
*work
)
1812 struct cm_id_private
*cm_id_priv
;
1813 struct cm_rep_msg
*rep_msg
;
1816 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1817 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
, 0);
1819 cm_dup_rep_handler(work
);
1823 cm_format_rep_event(work
, cm_id_priv
->qp_type
);
1825 spin_lock_irq(&cm_id_priv
->lock
);
1826 switch (cm_id_priv
->id
.state
) {
1827 case IB_CM_REQ_SENT
:
1828 case IB_CM_MRA_REQ_RCVD
:
1831 spin_unlock_irq(&cm_id_priv
->lock
);
1836 cm_id_priv
->timewait_info
->work
.remote_id
= rep_msg
->local_comm_id
;
1837 cm_id_priv
->timewait_info
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1838 cm_id_priv
->timewait_info
->remote_qpn
= cm_rep_get_qpn(rep_msg
, cm_id_priv
->qp_type
);
1840 spin_lock(&cm
.lock
);
1841 /* Check for duplicate REP. */
1842 if (cm_insert_remote_id(cm_id_priv
->timewait_info
)) {
1843 spin_unlock(&cm
.lock
);
1844 spin_unlock_irq(&cm_id_priv
->lock
);
1848 /* Check for a stale connection. */
1849 if (cm_insert_remote_qpn(cm_id_priv
->timewait_info
)) {
1850 rb_erase(&cm_id_priv
->timewait_info
->remote_id_node
,
1851 &cm
.remote_id_table
);
1852 cm_id_priv
->timewait_info
->inserted_remote_id
= 0;
1853 spin_unlock(&cm
.lock
);
1854 spin_unlock_irq(&cm_id_priv
->lock
);
1855 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1856 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REP
,
1861 spin_unlock(&cm
.lock
);
1863 cm_id_priv
->id
.state
= IB_CM_REP_RCVD
;
1864 cm_id_priv
->id
.remote_id
= rep_msg
->local_comm_id
;
1865 cm_id_priv
->remote_qpn
= cm_rep_get_qpn(rep_msg
, cm_id_priv
->qp_type
);
1866 cm_id_priv
->initiator_depth
= rep_msg
->resp_resources
;
1867 cm_id_priv
->responder_resources
= rep_msg
->initiator_depth
;
1868 cm_id_priv
->sq_psn
= cm_rep_get_starting_psn(rep_msg
);
1869 cm_id_priv
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1870 cm_id_priv
->target_ack_delay
= cm_rep_get_target_ack_delay(rep_msg
);
1871 cm_id_priv
->av
.timeout
=
1872 cm_ack_timeout(cm_id_priv
->target_ack_delay
,
1873 cm_id_priv
->av
.timeout
- 1);
1874 cm_id_priv
->alt_av
.timeout
=
1875 cm_ack_timeout(cm_id_priv
->target_ack_delay
,
1876 cm_id_priv
->alt_av
.timeout
- 1);
1878 /* todo: handle peer_to_peer */
1880 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1881 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1883 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1884 spin_unlock_irq(&cm_id_priv
->lock
);
1887 cm_process_work(cm_id_priv
, work
);
1889 cm_deref_id(cm_id_priv
);
1893 cm_deref_id(cm_id_priv
);
1897 static int cm_establish_handler(struct cm_work
*work
)
1899 struct cm_id_private
*cm_id_priv
;
1902 /* See comment in cm_establish about lookup. */
1903 cm_id_priv
= cm_acquire_id(work
->local_id
, work
->remote_id
);
1907 spin_lock_irq(&cm_id_priv
->lock
);
1908 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
) {
1909 spin_unlock_irq(&cm_id_priv
->lock
);
1913 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1914 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1916 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1917 spin_unlock_irq(&cm_id_priv
->lock
);
1920 cm_process_work(cm_id_priv
, work
);
1922 cm_deref_id(cm_id_priv
);
1925 cm_deref_id(cm_id_priv
);
1929 static int cm_rtu_handler(struct cm_work
*work
)
1931 struct cm_id_private
*cm_id_priv
;
1932 struct cm_rtu_msg
*rtu_msg
;
1935 rtu_msg
= (struct cm_rtu_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1936 cm_id_priv
= cm_acquire_id(rtu_msg
->remote_comm_id
,
1937 rtu_msg
->local_comm_id
);
1941 work
->cm_event
.private_data
= &rtu_msg
->private_data
;
1943 spin_lock_irq(&cm_id_priv
->lock
);
1944 if (cm_id_priv
->id
.state
!= IB_CM_REP_SENT
&&
1945 cm_id_priv
->id
.state
!= IB_CM_MRA_REP_RCVD
) {
1946 spin_unlock_irq(&cm_id_priv
->lock
);
1947 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
1948 counter
[CM_RTU_COUNTER
]);
1951 cm_id_priv
->id
.state
= IB_CM_ESTABLISHED
;
1953 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
1954 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
1956 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
1957 spin_unlock_irq(&cm_id_priv
->lock
);
1960 cm_process_work(cm_id_priv
, work
);
1962 cm_deref_id(cm_id_priv
);
1965 cm_deref_id(cm_id_priv
);
1969 static void cm_format_dreq(struct cm_dreq_msg
*dreq_msg
,
1970 struct cm_id_private
*cm_id_priv
,
1971 const void *private_data
,
1972 u8 private_data_len
)
1974 cm_format_mad_hdr(&dreq_msg
->hdr
, CM_DREQ_ATTR_ID
,
1975 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_DREQ
));
1976 dreq_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1977 dreq_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1978 cm_dreq_set_remote_qpn(dreq_msg
, cm_id_priv
->remote_qpn
);
1980 if (private_data
&& private_data_len
)
1981 memcpy(dreq_msg
->private_data
, private_data
, private_data_len
);
1984 int ib_send_cm_dreq(struct ib_cm_id
*cm_id
,
1985 const void *private_data
,
1986 u8 private_data_len
)
1988 struct cm_id_private
*cm_id_priv
;
1989 struct ib_mad_send_buf
*msg
;
1990 unsigned long flags
;
1993 if (private_data
&& private_data_len
> IB_CM_DREQ_PRIVATE_DATA_SIZE
)
1996 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1997 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1998 if (cm_id
->state
!= IB_CM_ESTABLISHED
) {
2003 if (cm_id
->lap_state
== IB_CM_LAP_SENT
||
2004 cm_id
->lap_state
== IB_CM_MRA_LAP_RCVD
)
2005 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2007 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2009 cm_enter_timewait(cm_id_priv
);
2013 cm_format_dreq((struct cm_dreq_msg
*) msg
->mad
, cm_id_priv
,
2014 private_data
, private_data_len
);
2015 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2016 msg
->context
[1] = (void *) (unsigned long) IB_CM_DREQ_SENT
;
2018 ret
= ib_post_send_mad(msg
, NULL
);
2020 cm_enter_timewait(cm_id_priv
);
2021 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2026 cm_id
->state
= IB_CM_DREQ_SENT
;
2027 cm_id_priv
->msg
= msg
;
2028 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2031 EXPORT_SYMBOL(ib_send_cm_dreq
);
2033 static void cm_format_drep(struct cm_drep_msg
*drep_msg
,
2034 struct cm_id_private
*cm_id_priv
,
2035 const void *private_data
,
2036 u8 private_data_len
)
2038 cm_format_mad_hdr(&drep_msg
->hdr
, CM_DREP_ATTR_ID
, cm_id_priv
->tid
);
2039 drep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2040 drep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2042 if (private_data
&& private_data_len
)
2043 memcpy(drep_msg
->private_data
, private_data
, private_data_len
);
2046 int ib_send_cm_drep(struct ib_cm_id
*cm_id
,
2047 const void *private_data
,
2048 u8 private_data_len
)
2050 struct cm_id_private
*cm_id_priv
;
2051 struct ib_mad_send_buf
*msg
;
2052 unsigned long flags
;
2056 if (private_data
&& private_data_len
> IB_CM_DREP_PRIVATE_DATA_SIZE
)
2059 data
= cm_copy_private_data(private_data
, private_data_len
);
2061 return PTR_ERR(data
);
2063 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2064 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2065 if (cm_id
->state
!= IB_CM_DREQ_RCVD
) {
2066 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2071 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
2072 cm_enter_timewait(cm_id_priv
);
2074 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2078 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
2079 private_data
, private_data_len
);
2081 ret
= ib_post_send_mad(msg
, NULL
);
2083 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2088 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2091 EXPORT_SYMBOL(ib_send_cm_drep
);
2093 static int cm_issue_drep(struct cm_port
*port
,
2094 struct ib_mad_recv_wc
*mad_recv_wc
)
2096 struct ib_mad_send_buf
*msg
= NULL
;
2097 struct cm_dreq_msg
*dreq_msg
;
2098 struct cm_drep_msg
*drep_msg
;
2101 ret
= cm_alloc_response_msg(port
, mad_recv_wc
, &msg
);
2105 dreq_msg
= (struct cm_dreq_msg
*) mad_recv_wc
->recv_buf
.mad
;
2106 drep_msg
= (struct cm_drep_msg
*) msg
->mad
;
2108 cm_format_mad_hdr(&drep_msg
->hdr
, CM_DREP_ATTR_ID
, dreq_msg
->hdr
.tid
);
2109 drep_msg
->remote_comm_id
= dreq_msg
->local_comm_id
;
2110 drep_msg
->local_comm_id
= dreq_msg
->remote_comm_id
;
2112 ret
= ib_post_send_mad(msg
, NULL
);
2119 static int cm_dreq_handler(struct cm_work
*work
)
2121 struct cm_id_private
*cm_id_priv
;
2122 struct cm_dreq_msg
*dreq_msg
;
2123 struct ib_mad_send_buf
*msg
= NULL
;
2126 dreq_msg
= (struct cm_dreq_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2127 cm_id_priv
= cm_acquire_id(dreq_msg
->remote_comm_id
,
2128 dreq_msg
->local_comm_id
);
2130 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2131 counter
[CM_DREQ_COUNTER
]);
2132 cm_issue_drep(work
->port
, work
->mad_recv_wc
);
2136 work
->cm_event
.private_data
= &dreq_msg
->private_data
;
2138 spin_lock_irq(&cm_id_priv
->lock
);
2139 if (cm_id_priv
->local_qpn
!= cm_dreq_get_remote_qpn(dreq_msg
))
2142 switch (cm_id_priv
->id
.state
) {
2143 case IB_CM_REP_SENT
:
2144 case IB_CM_DREQ_SENT
:
2145 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2147 case IB_CM_ESTABLISHED
:
2148 if (cm_id_priv
->id
.lap_state
== IB_CM_LAP_SENT
||
2149 cm_id_priv
->id
.lap_state
== IB_CM_MRA_LAP_RCVD
)
2150 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2152 case IB_CM_MRA_REP_RCVD
:
2154 case IB_CM_TIMEWAIT
:
2155 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2156 counter
[CM_DREQ_COUNTER
]);
2157 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
2160 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
2161 cm_id_priv
->private_data
,
2162 cm_id_priv
->private_data_len
);
2163 spin_unlock_irq(&cm_id_priv
->lock
);
2165 if (ib_post_send_mad(msg
, NULL
))
2168 case IB_CM_DREQ_RCVD
:
2169 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2170 counter
[CM_DREQ_COUNTER
]);
2175 cm_id_priv
->id
.state
= IB_CM_DREQ_RCVD
;
2176 cm_id_priv
->tid
= dreq_msg
->hdr
.tid
;
2177 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2179 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2180 spin_unlock_irq(&cm_id_priv
->lock
);
2183 cm_process_work(cm_id_priv
, work
);
2185 cm_deref_id(cm_id_priv
);
2188 unlock
: spin_unlock_irq(&cm_id_priv
->lock
);
2189 deref
: cm_deref_id(cm_id_priv
);
2193 static int cm_drep_handler(struct cm_work
*work
)
2195 struct cm_id_private
*cm_id_priv
;
2196 struct cm_drep_msg
*drep_msg
;
2199 drep_msg
= (struct cm_drep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2200 cm_id_priv
= cm_acquire_id(drep_msg
->remote_comm_id
,
2201 drep_msg
->local_comm_id
);
2205 work
->cm_event
.private_data
= &drep_msg
->private_data
;
2207 spin_lock_irq(&cm_id_priv
->lock
);
2208 if (cm_id_priv
->id
.state
!= IB_CM_DREQ_SENT
&&
2209 cm_id_priv
->id
.state
!= IB_CM_DREQ_RCVD
) {
2210 spin_unlock_irq(&cm_id_priv
->lock
);
2213 cm_enter_timewait(cm_id_priv
);
2215 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2216 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2218 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2219 spin_unlock_irq(&cm_id_priv
->lock
);
2222 cm_process_work(cm_id_priv
, work
);
2224 cm_deref_id(cm_id_priv
);
2227 cm_deref_id(cm_id_priv
);
2231 int ib_send_cm_rej(struct ib_cm_id
*cm_id
,
2232 enum ib_cm_rej_reason reason
,
2235 const void *private_data
,
2236 u8 private_data_len
)
2238 struct cm_id_private
*cm_id_priv
;
2239 struct ib_mad_send_buf
*msg
;
2240 unsigned long flags
;
2243 if ((private_data
&& private_data_len
> IB_CM_REJ_PRIVATE_DATA_SIZE
) ||
2244 (ari
&& ari_length
> IB_CM_REJ_ARI_LENGTH
))
2247 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2249 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2250 switch (cm_id
->state
) {
2251 case IB_CM_REQ_SENT
:
2252 case IB_CM_MRA_REQ_RCVD
:
2253 case IB_CM_REQ_RCVD
:
2254 case IB_CM_MRA_REQ_SENT
:
2255 case IB_CM_REP_RCVD
:
2256 case IB_CM_MRA_REP_SENT
:
2257 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2259 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
2260 cm_id_priv
, reason
, ari
, ari_length
,
2261 private_data
, private_data_len
);
2263 cm_reset_to_idle(cm_id_priv
);
2265 case IB_CM_REP_SENT
:
2266 case IB_CM_MRA_REP_RCVD
:
2267 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2269 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
2270 cm_id_priv
, reason
, ari
, ari_length
,
2271 private_data
, private_data_len
);
2273 cm_enter_timewait(cm_id_priv
);
2283 ret
= ib_post_send_mad(msg
, NULL
);
2287 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2290 EXPORT_SYMBOL(ib_send_cm_rej
);
2292 static void cm_format_rej_event(struct cm_work
*work
)
2294 struct cm_rej_msg
*rej_msg
;
2295 struct ib_cm_rej_event_param
*param
;
2297 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2298 param
= &work
->cm_event
.param
.rej_rcvd
;
2299 param
->ari
= rej_msg
->ari
;
2300 param
->ari_length
= cm_rej_get_reject_info_len(rej_msg
);
2301 param
->reason
= __be16_to_cpu(rej_msg
->reason
);
2302 work
->cm_event
.private_data
= &rej_msg
->private_data
;
2305 static struct cm_id_private
* cm_acquire_rejected_id(struct cm_rej_msg
*rej_msg
)
2307 struct cm_timewait_info
*timewait_info
;
2308 struct cm_id_private
*cm_id_priv
;
2311 remote_id
= rej_msg
->local_comm_id
;
2313 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_TIMEOUT
) {
2314 spin_lock_irq(&cm
.lock
);
2315 timewait_info
= cm_find_remote_id( *((__be64
*) rej_msg
->ari
),
2317 if (!timewait_info
) {
2318 spin_unlock_irq(&cm
.lock
);
2321 cm_id_priv
= idr_find(&cm
.local_id_table
, (__force
int)
2322 (timewait_info
->work
.local_id
^
2323 cm
.random_id_operand
));
2325 if (cm_id_priv
->id
.remote_id
== remote_id
)
2326 atomic_inc(&cm_id_priv
->refcount
);
2330 spin_unlock_irq(&cm
.lock
);
2331 } else if (cm_rej_get_msg_rejected(rej_msg
) == CM_MSG_RESPONSE_REQ
)
2332 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, 0);
2334 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, remote_id
);
2339 static int cm_rej_handler(struct cm_work
*work
)
2341 struct cm_id_private
*cm_id_priv
;
2342 struct cm_rej_msg
*rej_msg
;
2345 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2346 cm_id_priv
= cm_acquire_rejected_id(rej_msg
);
2350 cm_format_rej_event(work
);
2352 spin_lock_irq(&cm_id_priv
->lock
);
2353 switch (cm_id_priv
->id
.state
) {
2354 case IB_CM_REQ_SENT
:
2355 case IB_CM_MRA_REQ_RCVD
:
2356 case IB_CM_REP_SENT
:
2357 case IB_CM_MRA_REP_RCVD
:
2358 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2360 case IB_CM_REQ_RCVD
:
2361 case IB_CM_MRA_REQ_SENT
:
2362 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_STALE_CONN
)
2363 cm_enter_timewait(cm_id_priv
);
2365 cm_reset_to_idle(cm_id_priv
);
2367 case IB_CM_DREQ_SENT
:
2368 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2370 case IB_CM_REP_RCVD
:
2371 case IB_CM_MRA_REP_SENT
:
2372 cm_enter_timewait(cm_id_priv
);
2374 case IB_CM_ESTABLISHED
:
2375 if (cm_id_priv
->id
.lap_state
== IB_CM_LAP_UNINIT
||
2376 cm_id_priv
->id
.lap_state
== IB_CM_LAP_SENT
) {
2377 if (cm_id_priv
->id
.lap_state
== IB_CM_LAP_SENT
)
2378 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
,
2380 cm_enter_timewait(cm_id_priv
);
2385 spin_unlock_irq(&cm_id_priv
->lock
);
2390 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2392 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2393 spin_unlock_irq(&cm_id_priv
->lock
);
2396 cm_process_work(cm_id_priv
, work
);
2398 cm_deref_id(cm_id_priv
);
2401 cm_deref_id(cm_id_priv
);
2405 int ib_send_cm_mra(struct ib_cm_id
*cm_id
,
2407 const void *private_data
,
2408 u8 private_data_len
)
2410 struct cm_id_private
*cm_id_priv
;
2411 struct ib_mad_send_buf
*msg
;
2412 enum ib_cm_state cm_state
;
2413 enum ib_cm_lap_state lap_state
;
2414 enum cm_msg_response msg_response
;
2416 unsigned long flags
;
2419 if (private_data
&& private_data_len
> IB_CM_MRA_PRIVATE_DATA_SIZE
)
2422 data
= cm_copy_private_data(private_data
, private_data_len
);
2424 return PTR_ERR(data
);
2426 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2428 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2429 switch(cm_id_priv
->id
.state
) {
2430 case IB_CM_REQ_RCVD
:
2431 cm_state
= IB_CM_MRA_REQ_SENT
;
2432 lap_state
= cm_id
->lap_state
;
2433 msg_response
= CM_MSG_RESPONSE_REQ
;
2435 case IB_CM_REP_RCVD
:
2436 cm_state
= IB_CM_MRA_REP_SENT
;
2437 lap_state
= cm_id
->lap_state
;
2438 msg_response
= CM_MSG_RESPONSE_REP
;
2440 case IB_CM_ESTABLISHED
:
2441 if (cm_id
->lap_state
== IB_CM_LAP_RCVD
) {
2442 cm_state
= cm_id
->state
;
2443 lap_state
= IB_CM_MRA_LAP_SENT
;
2444 msg_response
= CM_MSG_RESPONSE_OTHER
;
2452 if (!(service_timeout
& IB_CM_MRA_FLAG_DELAY
)) {
2453 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2457 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2458 msg_response
, service_timeout
,
2459 private_data
, private_data_len
);
2460 ret
= ib_post_send_mad(msg
, NULL
);
2465 cm_id
->state
= cm_state
;
2466 cm_id
->lap_state
= lap_state
;
2467 cm_id_priv
->service_timeout
= service_timeout
;
2468 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
2469 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2472 error1
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2476 error2
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2481 EXPORT_SYMBOL(ib_send_cm_mra
);
2483 static struct cm_id_private
* cm_acquire_mraed_id(struct cm_mra_msg
*mra_msg
)
2485 switch (cm_mra_get_msg_mraed(mra_msg
)) {
2486 case CM_MSG_RESPONSE_REQ
:
2487 return cm_acquire_id(mra_msg
->remote_comm_id
, 0);
2488 case CM_MSG_RESPONSE_REP
:
2489 case CM_MSG_RESPONSE_OTHER
:
2490 return cm_acquire_id(mra_msg
->remote_comm_id
,
2491 mra_msg
->local_comm_id
);
2497 static int cm_mra_handler(struct cm_work
*work
)
2499 struct cm_id_private
*cm_id_priv
;
2500 struct cm_mra_msg
*mra_msg
;
2503 mra_msg
= (struct cm_mra_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2504 cm_id_priv
= cm_acquire_mraed_id(mra_msg
);
2508 work
->cm_event
.private_data
= &mra_msg
->private_data
;
2509 work
->cm_event
.param
.mra_rcvd
.service_timeout
=
2510 cm_mra_get_service_timeout(mra_msg
);
2511 timeout
= cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg
)) +
2512 cm_convert_to_ms(cm_id_priv
->av
.timeout
);
2514 spin_lock_irq(&cm_id_priv
->lock
);
2515 switch (cm_id_priv
->id
.state
) {
2516 case IB_CM_REQ_SENT
:
2517 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REQ
||
2518 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2519 cm_id_priv
->msg
, timeout
))
2521 cm_id_priv
->id
.state
= IB_CM_MRA_REQ_RCVD
;
2523 case IB_CM_REP_SENT
:
2524 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REP
||
2525 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2526 cm_id_priv
->msg
, timeout
))
2528 cm_id_priv
->id
.state
= IB_CM_MRA_REP_RCVD
;
2530 case IB_CM_ESTABLISHED
:
2531 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_OTHER
||
2532 cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
||
2533 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2534 cm_id_priv
->msg
, timeout
)) {
2535 if (cm_id_priv
->id
.lap_state
== IB_CM_MRA_LAP_RCVD
)
2536 atomic_long_inc(&work
->port
->
2537 counter_group
[CM_RECV_DUPLICATES
].
2538 counter
[CM_MRA_COUNTER
]);
2541 cm_id_priv
->id
.lap_state
= IB_CM_MRA_LAP_RCVD
;
2543 case IB_CM_MRA_REQ_RCVD
:
2544 case IB_CM_MRA_REP_RCVD
:
2545 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2546 counter
[CM_MRA_COUNTER
]);
2552 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long)
2553 cm_id_priv
->id
.state
;
2554 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2556 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2557 spin_unlock_irq(&cm_id_priv
->lock
);
2560 cm_process_work(cm_id_priv
, work
);
2562 cm_deref_id(cm_id_priv
);
2565 spin_unlock_irq(&cm_id_priv
->lock
);
2566 cm_deref_id(cm_id_priv
);
2570 static void cm_format_lap(struct cm_lap_msg
*lap_msg
,
2571 struct cm_id_private
*cm_id_priv
,
2572 struct ib_sa_path_rec
*alternate_path
,
2573 const void *private_data
,
2574 u8 private_data_len
)
2576 cm_format_mad_hdr(&lap_msg
->hdr
, CM_LAP_ATTR_ID
,
2577 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_LAP
));
2578 lap_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2579 lap_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2580 cm_lap_set_remote_qpn(lap_msg
, cm_id_priv
->remote_qpn
);
2581 /* todo: need remote CM response timeout */
2582 cm_lap_set_remote_resp_timeout(lap_msg
, 0x1F);
2583 lap_msg
->alt_local_lid
= alternate_path
->slid
;
2584 lap_msg
->alt_remote_lid
= alternate_path
->dlid
;
2585 lap_msg
->alt_local_gid
= alternate_path
->sgid
;
2586 lap_msg
->alt_remote_gid
= alternate_path
->dgid
;
2587 cm_lap_set_flow_label(lap_msg
, alternate_path
->flow_label
);
2588 cm_lap_set_traffic_class(lap_msg
, alternate_path
->traffic_class
);
2589 lap_msg
->alt_hop_limit
= alternate_path
->hop_limit
;
2590 cm_lap_set_packet_rate(lap_msg
, alternate_path
->rate
);
2591 cm_lap_set_sl(lap_msg
, alternate_path
->sl
);
2592 cm_lap_set_subnet_local(lap_msg
, 1); /* local only... */
2593 cm_lap_set_local_ack_timeout(lap_msg
,
2594 cm_ack_timeout(cm_id_priv
->av
.port
->cm_dev
->ack_delay
,
2595 alternate_path
->packet_life_time
));
2597 if (private_data
&& private_data_len
)
2598 memcpy(lap_msg
->private_data
, private_data
, private_data_len
);
2601 int ib_send_cm_lap(struct ib_cm_id
*cm_id
,
2602 struct ib_sa_path_rec
*alternate_path
,
2603 const void *private_data
,
2604 u8 private_data_len
)
2606 struct cm_id_private
*cm_id_priv
;
2607 struct ib_mad_send_buf
*msg
;
2608 unsigned long flags
;
2611 if (private_data
&& private_data_len
> IB_CM_LAP_PRIVATE_DATA_SIZE
)
2614 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2615 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2616 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2617 (cm_id
->lap_state
!= IB_CM_LAP_UNINIT
&&
2618 cm_id
->lap_state
!= IB_CM_LAP_IDLE
)) {
2623 ret
= cm_init_av_by_path(alternate_path
, &cm_id_priv
->alt_av
);
2626 cm_id_priv
->alt_av
.timeout
=
2627 cm_ack_timeout(cm_id_priv
->target_ack_delay
,
2628 cm_id_priv
->alt_av
.timeout
- 1);
2630 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2634 cm_format_lap((struct cm_lap_msg
*) msg
->mad
, cm_id_priv
,
2635 alternate_path
, private_data
, private_data_len
);
2636 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2637 msg
->context
[1] = (void *) (unsigned long) IB_CM_ESTABLISHED
;
2639 ret
= ib_post_send_mad(msg
, NULL
);
2641 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2646 cm_id
->lap_state
= IB_CM_LAP_SENT
;
2647 cm_id_priv
->msg
= msg
;
2649 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2652 EXPORT_SYMBOL(ib_send_cm_lap
);
2654 static void cm_format_path_from_lap(struct cm_id_private
*cm_id_priv
,
2655 struct ib_sa_path_rec
*path
,
2656 struct cm_lap_msg
*lap_msg
)
2658 memset(path
, 0, sizeof *path
);
2659 path
->dgid
= lap_msg
->alt_local_gid
;
2660 path
->sgid
= lap_msg
->alt_remote_gid
;
2661 path
->dlid
= lap_msg
->alt_local_lid
;
2662 path
->slid
= lap_msg
->alt_remote_lid
;
2663 path
->flow_label
= cm_lap_get_flow_label(lap_msg
);
2664 path
->hop_limit
= lap_msg
->alt_hop_limit
;
2665 path
->traffic_class
= cm_lap_get_traffic_class(lap_msg
);
2666 path
->reversible
= 1;
2667 path
->pkey
= cm_id_priv
->pkey
;
2668 path
->sl
= cm_lap_get_sl(lap_msg
);
2669 path
->mtu_selector
= IB_SA_EQ
;
2670 path
->mtu
= cm_id_priv
->path_mtu
;
2671 path
->rate_selector
= IB_SA_EQ
;
2672 path
->rate
= cm_lap_get_packet_rate(lap_msg
);
2673 path
->packet_life_time_selector
= IB_SA_EQ
;
2674 path
->packet_life_time
= cm_lap_get_local_ack_timeout(lap_msg
);
2675 path
->packet_life_time
-= (path
->packet_life_time
> 0);
2678 static int cm_lap_handler(struct cm_work
*work
)
2680 struct cm_id_private
*cm_id_priv
;
2681 struct cm_lap_msg
*lap_msg
;
2682 struct ib_cm_lap_event_param
*param
;
2683 struct ib_mad_send_buf
*msg
= NULL
;
2686 /* todo: verify LAP request and send reject APR if invalid. */
2687 lap_msg
= (struct cm_lap_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2688 cm_id_priv
= cm_acquire_id(lap_msg
->remote_comm_id
,
2689 lap_msg
->local_comm_id
);
2693 param
= &work
->cm_event
.param
.lap_rcvd
;
2694 param
->alternate_path
= &work
->path
[0];
2695 cm_format_path_from_lap(cm_id_priv
, param
->alternate_path
, lap_msg
);
2696 work
->cm_event
.private_data
= &lap_msg
->private_data
;
2698 spin_lock_irq(&cm_id_priv
->lock
);
2699 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
)
2702 switch (cm_id_priv
->id
.lap_state
) {
2703 case IB_CM_LAP_UNINIT
:
2704 case IB_CM_LAP_IDLE
:
2706 case IB_CM_MRA_LAP_SENT
:
2707 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2708 counter
[CM_LAP_COUNTER
]);
2709 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
2712 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2713 CM_MSG_RESPONSE_OTHER
,
2714 cm_id_priv
->service_timeout
,
2715 cm_id_priv
->private_data
,
2716 cm_id_priv
->private_data_len
);
2717 spin_unlock_irq(&cm_id_priv
->lock
);
2719 if (ib_post_send_mad(msg
, NULL
))
2722 case IB_CM_LAP_RCVD
:
2723 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2724 counter
[CM_LAP_COUNTER
]);
2730 cm_id_priv
->id
.lap_state
= IB_CM_LAP_RCVD
;
2731 cm_id_priv
->tid
= lap_msg
->hdr
.tid
;
2732 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
2733 work
->mad_recv_wc
->recv_buf
.grh
,
2735 cm_init_av_by_path(param
->alternate_path
, &cm_id_priv
->alt_av
);
2736 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2738 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2739 spin_unlock_irq(&cm_id_priv
->lock
);
2742 cm_process_work(cm_id_priv
, work
);
2744 cm_deref_id(cm_id_priv
);
2747 unlock
: spin_unlock_irq(&cm_id_priv
->lock
);
2748 deref
: cm_deref_id(cm_id_priv
);
2752 static void cm_format_apr(struct cm_apr_msg
*apr_msg
,
2753 struct cm_id_private
*cm_id_priv
,
2754 enum ib_cm_apr_status status
,
2757 const void *private_data
,
2758 u8 private_data_len
)
2760 cm_format_mad_hdr(&apr_msg
->hdr
, CM_APR_ATTR_ID
, cm_id_priv
->tid
);
2761 apr_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2762 apr_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2763 apr_msg
->ap_status
= (u8
) status
;
2765 if (info
&& info_length
) {
2766 apr_msg
->info_length
= info_length
;
2767 memcpy(apr_msg
->info
, info
, info_length
);
2770 if (private_data
&& private_data_len
)
2771 memcpy(apr_msg
->private_data
, private_data
, private_data_len
);
2774 int ib_send_cm_apr(struct ib_cm_id
*cm_id
,
2775 enum ib_cm_apr_status status
,
2778 const void *private_data
,
2779 u8 private_data_len
)
2781 struct cm_id_private
*cm_id_priv
;
2782 struct ib_mad_send_buf
*msg
;
2783 unsigned long flags
;
2786 if ((private_data
&& private_data_len
> IB_CM_APR_PRIVATE_DATA_SIZE
) ||
2787 (info
&& info_length
> IB_CM_APR_INFO_LENGTH
))
2790 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2791 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2792 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2793 (cm_id
->lap_state
!= IB_CM_LAP_RCVD
&&
2794 cm_id
->lap_state
!= IB_CM_MRA_LAP_SENT
)) {
2799 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2803 cm_format_apr((struct cm_apr_msg
*) msg
->mad
, cm_id_priv
, status
,
2804 info
, info_length
, private_data
, private_data_len
);
2805 ret
= ib_post_send_mad(msg
, NULL
);
2807 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2812 cm_id
->lap_state
= IB_CM_LAP_IDLE
;
2813 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2816 EXPORT_SYMBOL(ib_send_cm_apr
);
2818 static int cm_apr_handler(struct cm_work
*work
)
2820 struct cm_id_private
*cm_id_priv
;
2821 struct cm_apr_msg
*apr_msg
;
2824 apr_msg
= (struct cm_apr_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2825 cm_id_priv
= cm_acquire_id(apr_msg
->remote_comm_id
,
2826 apr_msg
->local_comm_id
);
2828 return -EINVAL
; /* Unmatched reply. */
2830 work
->cm_event
.param
.apr_rcvd
.ap_status
= apr_msg
->ap_status
;
2831 work
->cm_event
.param
.apr_rcvd
.apr_info
= &apr_msg
->info
;
2832 work
->cm_event
.param
.apr_rcvd
.info_len
= apr_msg
->info_length
;
2833 work
->cm_event
.private_data
= &apr_msg
->private_data
;
2835 spin_lock_irq(&cm_id_priv
->lock
);
2836 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
||
2837 (cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
&&
2838 cm_id_priv
->id
.lap_state
!= IB_CM_MRA_LAP_RCVD
)) {
2839 spin_unlock_irq(&cm_id_priv
->lock
);
2842 cm_id_priv
->id
.lap_state
= IB_CM_LAP_IDLE
;
2843 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2844 cm_id_priv
->msg
= NULL
;
2846 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2848 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2849 spin_unlock_irq(&cm_id_priv
->lock
);
2852 cm_process_work(cm_id_priv
, work
);
2854 cm_deref_id(cm_id_priv
);
2857 cm_deref_id(cm_id_priv
);
2861 static int cm_timewait_handler(struct cm_work
*work
)
2863 struct cm_timewait_info
*timewait_info
;
2864 struct cm_id_private
*cm_id_priv
;
2867 timewait_info
= (struct cm_timewait_info
*)work
;
2868 spin_lock_irq(&cm
.lock
);
2869 list_del(&timewait_info
->list
);
2870 spin_unlock_irq(&cm
.lock
);
2872 cm_id_priv
= cm_acquire_id(timewait_info
->work
.local_id
,
2873 timewait_info
->work
.remote_id
);
2877 spin_lock_irq(&cm_id_priv
->lock
);
2878 if (cm_id_priv
->id
.state
!= IB_CM_TIMEWAIT
||
2879 cm_id_priv
->remote_qpn
!= timewait_info
->remote_qpn
) {
2880 spin_unlock_irq(&cm_id_priv
->lock
);
2883 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2884 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2886 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2887 spin_unlock_irq(&cm_id_priv
->lock
);
2890 cm_process_work(cm_id_priv
, work
);
2892 cm_deref_id(cm_id_priv
);
2895 cm_deref_id(cm_id_priv
);
2899 static void cm_format_sidr_req(struct cm_sidr_req_msg
*sidr_req_msg
,
2900 struct cm_id_private
*cm_id_priv
,
2901 struct ib_cm_sidr_req_param
*param
)
2903 cm_format_mad_hdr(&sidr_req_msg
->hdr
, CM_SIDR_REQ_ATTR_ID
,
2904 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_SIDR
));
2905 sidr_req_msg
->request_id
= cm_id_priv
->id
.local_id
;
2906 sidr_req_msg
->pkey
= param
->path
->pkey
;
2907 sidr_req_msg
->service_id
= param
->service_id
;
2909 if (param
->private_data
&& param
->private_data_len
)
2910 memcpy(sidr_req_msg
->private_data
, param
->private_data
,
2911 param
->private_data_len
);
2914 int ib_send_cm_sidr_req(struct ib_cm_id
*cm_id
,
2915 struct ib_cm_sidr_req_param
*param
)
2917 struct cm_id_private
*cm_id_priv
;
2918 struct ib_mad_send_buf
*msg
;
2919 unsigned long flags
;
2922 if (!param
->path
|| (param
->private_data
&&
2923 param
->private_data_len
> IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
))
2926 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2927 ret
= cm_init_av_by_path(param
->path
, &cm_id_priv
->av
);
2931 cm_id
->service_id
= param
->service_id
;
2932 cm_id
->service_mask
= ~cpu_to_be64(0);
2933 cm_id_priv
->timeout_ms
= param
->timeout_ms
;
2934 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
2935 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2939 cm_format_sidr_req((struct cm_sidr_req_msg
*) msg
->mad
, cm_id_priv
,
2941 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2942 msg
->context
[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT
;
2944 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2945 if (cm_id
->state
== IB_CM_IDLE
)
2946 ret
= ib_post_send_mad(msg
, NULL
);
2951 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2955 cm_id
->state
= IB_CM_SIDR_REQ_SENT
;
2956 cm_id_priv
->msg
= msg
;
2957 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2961 EXPORT_SYMBOL(ib_send_cm_sidr_req
);
2963 static void cm_format_sidr_req_event(struct cm_work
*work
,
2964 struct ib_cm_id
*listen_id
)
2966 struct cm_sidr_req_msg
*sidr_req_msg
;
2967 struct ib_cm_sidr_req_event_param
*param
;
2969 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2970 work
->mad_recv_wc
->recv_buf
.mad
;
2971 param
= &work
->cm_event
.param
.sidr_req_rcvd
;
2972 param
->pkey
= __be16_to_cpu(sidr_req_msg
->pkey
);
2973 param
->listen_id
= listen_id
;
2974 param
->port
= work
->port
->port_num
;
2975 work
->cm_event
.private_data
= &sidr_req_msg
->private_data
;
2978 static int cm_sidr_req_handler(struct cm_work
*work
)
2980 struct ib_cm_id
*cm_id
;
2981 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
2982 struct cm_sidr_req_msg
*sidr_req_msg
;
2985 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->ib_device
, NULL
, NULL
);
2987 return PTR_ERR(cm_id
);
2988 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2990 /* Record SGID/SLID and request ID for lookup. */
2991 sidr_req_msg
= (struct cm_sidr_req_msg
*)
2992 work
->mad_recv_wc
->recv_buf
.mad
;
2993 wc
= work
->mad_recv_wc
->wc
;
2994 cm_id_priv
->av
.dgid
.global
.subnet_prefix
= cpu_to_be64(wc
->slid
);
2995 cm_id_priv
->av
.dgid
.global
.interface_id
= 0;
2996 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
2997 work
->mad_recv_wc
->recv_buf
.grh
,
2999 cm_id_priv
->id
.remote_id
= sidr_req_msg
->request_id
;
3000 cm_id_priv
->tid
= sidr_req_msg
->hdr
.tid
;
3001 atomic_inc(&cm_id_priv
->work_count
);
3003 spin_lock_irq(&cm
.lock
);
3004 cur_cm_id_priv
= cm_insert_remote_sidr(cm_id_priv
);
3005 if (cur_cm_id_priv
) {
3006 spin_unlock_irq(&cm
.lock
);
3007 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
3008 counter
[CM_SIDR_REQ_COUNTER
]);
3009 goto out
; /* Duplicate message. */
3011 cm_id_priv
->id
.state
= IB_CM_SIDR_REQ_RCVD
;
3012 cur_cm_id_priv
= cm_find_listen(cm_id
->device
,
3013 sidr_req_msg
->service_id
,
3014 sidr_req_msg
->private_data
);
3015 if (!cur_cm_id_priv
) {
3016 spin_unlock_irq(&cm
.lock
);
3017 cm_reject_sidr_req(cm_id_priv
, IB_SIDR_UNSUPPORTED
);
3018 goto out
; /* No match. */
3020 atomic_inc(&cur_cm_id_priv
->refcount
);
3021 atomic_inc(&cm_id_priv
->refcount
);
3022 spin_unlock_irq(&cm
.lock
);
3024 cm_id_priv
->id
.cm_handler
= cur_cm_id_priv
->id
.cm_handler
;
3025 cm_id_priv
->id
.context
= cur_cm_id_priv
->id
.context
;
3026 cm_id_priv
->id
.service_id
= sidr_req_msg
->service_id
;
3027 cm_id_priv
->id
.service_mask
= ~cpu_to_be64(0);
3029 cm_format_sidr_req_event(work
, &cur_cm_id_priv
->id
);
3030 cm_process_work(cm_id_priv
, work
);
3031 cm_deref_id(cur_cm_id_priv
);
3034 ib_destroy_cm_id(&cm_id_priv
->id
);
3038 static void cm_format_sidr_rep(struct cm_sidr_rep_msg
*sidr_rep_msg
,
3039 struct cm_id_private
*cm_id_priv
,
3040 struct ib_cm_sidr_rep_param
*param
)
3042 cm_format_mad_hdr(&sidr_rep_msg
->hdr
, CM_SIDR_REP_ATTR_ID
,
3044 sidr_rep_msg
->request_id
= cm_id_priv
->id
.remote_id
;
3045 sidr_rep_msg
->status
= param
->status
;
3046 cm_sidr_rep_set_qpn(sidr_rep_msg
, cpu_to_be32(param
->qp_num
));
3047 sidr_rep_msg
->service_id
= cm_id_priv
->id
.service_id
;
3048 sidr_rep_msg
->qkey
= cpu_to_be32(param
->qkey
);
3050 if (param
->info
&& param
->info_length
)
3051 memcpy(sidr_rep_msg
->info
, param
->info
, param
->info_length
);
3053 if (param
->private_data
&& param
->private_data_len
)
3054 memcpy(sidr_rep_msg
->private_data
, param
->private_data
,
3055 param
->private_data_len
);
3058 int ib_send_cm_sidr_rep(struct ib_cm_id
*cm_id
,
3059 struct ib_cm_sidr_rep_param
*param
)
3061 struct cm_id_private
*cm_id_priv
;
3062 struct ib_mad_send_buf
*msg
;
3063 unsigned long flags
;
3066 if ((param
->info
&& param
->info_length
> IB_CM_SIDR_REP_INFO_LENGTH
) ||
3067 (param
->private_data
&&
3068 param
->private_data_len
> IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
))
3071 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3072 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3073 if (cm_id
->state
!= IB_CM_SIDR_REQ_RCVD
) {
3078 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
3082 cm_format_sidr_rep((struct cm_sidr_rep_msg
*) msg
->mad
, cm_id_priv
,
3084 ret
= ib_post_send_mad(msg
, NULL
);
3086 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3090 cm_id
->state
= IB_CM_IDLE
;
3091 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3093 spin_lock_irqsave(&cm
.lock
, flags
);
3094 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
3095 spin_unlock_irqrestore(&cm
.lock
, flags
);
3098 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3101 EXPORT_SYMBOL(ib_send_cm_sidr_rep
);
3103 static void cm_format_sidr_rep_event(struct cm_work
*work
)
3105 struct cm_sidr_rep_msg
*sidr_rep_msg
;
3106 struct ib_cm_sidr_rep_event_param
*param
;
3108 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
3109 work
->mad_recv_wc
->recv_buf
.mad
;
3110 param
= &work
->cm_event
.param
.sidr_rep_rcvd
;
3111 param
->status
= sidr_rep_msg
->status
;
3112 param
->qkey
= be32_to_cpu(sidr_rep_msg
->qkey
);
3113 param
->qpn
= be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg
));
3114 param
->info
= &sidr_rep_msg
->info
;
3115 param
->info_len
= sidr_rep_msg
->info_length
;
3116 work
->cm_event
.private_data
= &sidr_rep_msg
->private_data
;
3119 static int cm_sidr_rep_handler(struct cm_work
*work
)
3121 struct cm_sidr_rep_msg
*sidr_rep_msg
;
3122 struct cm_id_private
*cm_id_priv
;
3124 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
3125 work
->mad_recv_wc
->recv_buf
.mad
;
3126 cm_id_priv
= cm_acquire_id(sidr_rep_msg
->request_id
, 0);
3128 return -EINVAL
; /* Unmatched reply. */
3130 spin_lock_irq(&cm_id_priv
->lock
);
3131 if (cm_id_priv
->id
.state
!= IB_CM_SIDR_REQ_SENT
) {
3132 spin_unlock_irq(&cm_id_priv
->lock
);
3135 cm_id_priv
->id
.state
= IB_CM_IDLE
;
3136 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
3137 spin_unlock_irq(&cm_id_priv
->lock
);
3139 cm_format_sidr_rep_event(work
);
3140 cm_process_work(cm_id_priv
, work
);
3143 cm_deref_id(cm_id_priv
);
3147 static void cm_process_send_error(struct ib_mad_send_buf
*msg
,
3148 enum ib_wc_status wc_status
)
3150 struct cm_id_private
*cm_id_priv
;
3151 struct ib_cm_event cm_event
;
3152 enum ib_cm_state state
;
3155 memset(&cm_event
, 0, sizeof cm_event
);
3156 cm_id_priv
= msg
->context
[0];
3158 /* Discard old sends or ones without a response. */
3159 spin_lock_irq(&cm_id_priv
->lock
);
3160 state
= (enum ib_cm_state
) (unsigned long) msg
->context
[1];
3161 if (msg
!= cm_id_priv
->msg
|| state
!= cm_id_priv
->id
.state
)
3165 case IB_CM_REQ_SENT
:
3166 case IB_CM_MRA_REQ_RCVD
:
3167 cm_reset_to_idle(cm_id_priv
);
3168 cm_event
.event
= IB_CM_REQ_ERROR
;
3170 case IB_CM_REP_SENT
:
3171 case IB_CM_MRA_REP_RCVD
:
3172 cm_reset_to_idle(cm_id_priv
);
3173 cm_event
.event
= IB_CM_REP_ERROR
;
3175 case IB_CM_DREQ_SENT
:
3176 cm_enter_timewait(cm_id_priv
);
3177 cm_event
.event
= IB_CM_DREQ_ERROR
;
3179 case IB_CM_SIDR_REQ_SENT
:
3180 cm_id_priv
->id
.state
= IB_CM_IDLE
;
3181 cm_event
.event
= IB_CM_SIDR_REQ_ERROR
;
3186 spin_unlock_irq(&cm_id_priv
->lock
);
3187 cm_event
.param
.send_status
= wc_status
;
3189 /* No other events can occur on the cm_id at this point. */
3190 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &cm_event
);
3193 ib_destroy_cm_id(&cm_id_priv
->id
);
3196 spin_unlock_irq(&cm_id_priv
->lock
);
3200 static void cm_send_handler(struct ib_mad_agent
*mad_agent
,
3201 struct ib_mad_send_wc
*mad_send_wc
)
3203 struct ib_mad_send_buf
*msg
= mad_send_wc
->send_buf
;
3204 struct cm_port
*port
;
3207 port
= mad_agent
->context
;
3208 attr_index
= be16_to_cpu(((struct ib_mad_hdr
*)
3209 msg
->mad
)->attr_id
) - CM_ATTR_ID_OFFSET
;
3212 * If the send was in response to a received message (context[0] is not
3213 * set to a cm_id), and is not a REJ, then it is a send that was
3216 if (!msg
->context
[0] && (attr_index
!= CM_REJ_COUNTER
))
3219 atomic_long_add(1 + msg
->retries
,
3220 &port
->counter_group
[CM_XMIT
].counter
[attr_index
]);
3222 atomic_long_add(msg
->retries
,
3223 &port
->counter_group
[CM_XMIT_RETRIES
].
3224 counter
[attr_index
]);
3226 switch (mad_send_wc
->status
) {
3228 case IB_WC_WR_FLUSH_ERR
:
3232 if (msg
->context
[0] && msg
->context
[1])
3233 cm_process_send_error(msg
, mad_send_wc
->status
);
3240 static void cm_work_handler(struct work_struct
*_work
)
3242 struct cm_work
*work
= container_of(_work
, struct cm_work
, work
.work
);
3245 switch (work
->cm_event
.event
) {
3246 case IB_CM_REQ_RECEIVED
:
3247 ret
= cm_req_handler(work
);
3249 case IB_CM_MRA_RECEIVED
:
3250 ret
= cm_mra_handler(work
);
3252 case IB_CM_REJ_RECEIVED
:
3253 ret
= cm_rej_handler(work
);
3255 case IB_CM_REP_RECEIVED
:
3256 ret
= cm_rep_handler(work
);
3258 case IB_CM_RTU_RECEIVED
:
3259 ret
= cm_rtu_handler(work
);
3261 case IB_CM_USER_ESTABLISHED
:
3262 ret
= cm_establish_handler(work
);
3264 case IB_CM_DREQ_RECEIVED
:
3265 ret
= cm_dreq_handler(work
);
3267 case IB_CM_DREP_RECEIVED
:
3268 ret
= cm_drep_handler(work
);
3270 case IB_CM_SIDR_REQ_RECEIVED
:
3271 ret
= cm_sidr_req_handler(work
);
3273 case IB_CM_SIDR_REP_RECEIVED
:
3274 ret
= cm_sidr_rep_handler(work
);
3276 case IB_CM_LAP_RECEIVED
:
3277 ret
= cm_lap_handler(work
);
3279 case IB_CM_APR_RECEIVED
:
3280 ret
= cm_apr_handler(work
);
3282 case IB_CM_TIMEWAIT_EXIT
:
3283 ret
= cm_timewait_handler(work
);
3293 static int cm_establish(struct ib_cm_id
*cm_id
)
3295 struct cm_id_private
*cm_id_priv
;
3296 struct cm_work
*work
;
3297 unsigned long flags
;
3300 work
= kmalloc(sizeof *work
, GFP_ATOMIC
);
3304 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3305 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3306 switch (cm_id
->state
)
3308 case IB_CM_REP_SENT
:
3309 case IB_CM_MRA_REP_RCVD
:
3310 cm_id
->state
= IB_CM_ESTABLISHED
;
3312 case IB_CM_ESTABLISHED
:
3319 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3327 * The CM worker thread may try to destroy the cm_id before it
3328 * can execute this work item. To prevent potential deadlock,
3329 * we need to find the cm_id once we're in the context of the
3330 * worker thread, rather than holding a reference on it.
3332 INIT_DELAYED_WORK(&work
->work
, cm_work_handler
);
3333 work
->local_id
= cm_id
->local_id
;
3334 work
->remote_id
= cm_id
->remote_id
;
3335 work
->mad_recv_wc
= NULL
;
3336 work
->cm_event
.event
= IB_CM_USER_ESTABLISHED
;
3337 queue_delayed_work(cm
.wq
, &work
->work
, 0);
3342 static int cm_migrate(struct ib_cm_id
*cm_id
)
3344 struct cm_id_private
*cm_id_priv
;
3345 unsigned long flags
;
3348 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3349 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3350 if (cm_id
->state
== IB_CM_ESTABLISHED
&&
3351 (cm_id
->lap_state
== IB_CM_LAP_UNINIT
||
3352 cm_id
->lap_state
== IB_CM_LAP_IDLE
)) {
3353 cm_id
->lap_state
= IB_CM_LAP_IDLE
;
3354 cm_id_priv
->av
= cm_id_priv
->alt_av
;
3357 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3362 int ib_cm_notify(struct ib_cm_id
*cm_id
, enum ib_event_type event
)
3367 case IB_EVENT_COMM_EST
:
3368 ret
= cm_establish(cm_id
);
3370 case IB_EVENT_PATH_MIG
:
3371 ret
= cm_migrate(cm_id
);
3378 EXPORT_SYMBOL(ib_cm_notify
);
3380 static void cm_recv_handler(struct ib_mad_agent
*mad_agent
,
3381 struct ib_mad_recv_wc
*mad_recv_wc
)
3383 struct cm_port
*port
= mad_agent
->context
;
3384 struct cm_work
*work
;
3385 enum ib_cm_event_type event
;
3389 switch (mad_recv_wc
->recv_buf
.mad
->mad_hdr
.attr_id
) {
3390 case CM_REQ_ATTR_ID
:
3391 paths
= 1 + (((struct cm_req_msg
*) mad_recv_wc
->recv_buf
.mad
)->
3392 alt_local_lid
!= 0);
3393 event
= IB_CM_REQ_RECEIVED
;
3395 case CM_MRA_ATTR_ID
:
3396 event
= IB_CM_MRA_RECEIVED
;
3398 case CM_REJ_ATTR_ID
:
3399 event
= IB_CM_REJ_RECEIVED
;
3401 case CM_REP_ATTR_ID
:
3402 event
= IB_CM_REP_RECEIVED
;
3404 case CM_RTU_ATTR_ID
:
3405 event
= IB_CM_RTU_RECEIVED
;
3407 case CM_DREQ_ATTR_ID
:
3408 event
= IB_CM_DREQ_RECEIVED
;
3410 case CM_DREP_ATTR_ID
:
3411 event
= IB_CM_DREP_RECEIVED
;
3413 case CM_SIDR_REQ_ATTR_ID
:
3414 event
= IB_CM_SIDR_REQ_RECEIVED
;
3416 case CM_SIDR_REP_ATTR_ID
:
3417 event
= IB_CM_SIDR_REP_RECEIVED
;
3419 case CM_LAP_ATTR_ID
:
3421 event
= IB_CM_LAP_RECEIVED
;
3423 case CM_APR_ATTR_ID
:
3424 event
= IB_CM_APR_RECEIVED
;
3427 ib_free_recv_mad(mad_recv_wc
);
3431 attr_id
= be16_to_cpu(mad_recv_wc
->recv_buf
.mad
->mad_hdr
.attr_id
);
3432 atomic_long_inc(&port
->counter_group
[CM_RECV
].
3433 counter
[attr_id
- CM_ATTR_ID_OFFSET
]);
3435 work
= kmalloc(sizeof *work
+ sizeof(struct ib_sa_path_rec
) * paths
,
3438 ib_free_recv_mad(mad_recv_wc
);
3442 INIT_DELAYED_WORK(&work
->work
, cm_work_handler
);
3443 work
->cm_event
.event
= event
;
3444 work
->mad_recv_wc
= mad_recv_wc
;
3446 queue_delayed_work(cm
.wq
, &work
->work
, 0);
3449 static int cm_init_qp_init_attr(struct cm_id_private
*cm_id_priv
,
3450 struct ib_qp_attr
*qp_attr
,
3453 unsigned long flags
;
3456 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3457 switch (cm_id_priv
->id
.state
) {
3458 case IB_CM_REQ_SENT
:
3459 case IB_CM_MRA_REQ_RCVD
:
3460 case IB_CM_REQ_RCVD
:
3461 case IB_CM_MRA_REQ_SENT
:
3462 case IB_CM_REP_RCVD
:
3463 case IB_CM_MRA_REP_SENT
:
3464 case IB_CM_REP_SENT
:
3465 case IB_CM_MRA_REP_RCVD
:
3466 case IB_CM_ESTABLISHED
:
3467 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
|
3468 IB_QP_PKEY_INDEX
| IB_QP_PORT
;
3469 qp_attr
->qp_access_flags
= IB_ACCESS_REMOTE_WRITE
;
3470 if (cm_id_priv
->responder_resources
)
3471 qp_attr
->qp_access_flags
|= IB_ACCESS_REMOTE_READ
|
3472 IB_ACCESS_REMOTE_ATOMIC
;
3473 qp_attr
->pkey_index
= cm_id_priv
->av
.pkey_index
;
3474 qp_attr
->port_num
= cm_id_priv
->av
.port
->port_num
;
3481 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3485 static int cm_init_qp_rtr_attr(struct cm_id_private
*cm_id_priv
,
3486 struct ib_qp_attr
*qp_attr
,
3489 unsigned long flags
;
3492 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3493 switch (cm_id_priv
->id
.state
) {
3494 case IB_CM_REQ_RCVD
:
3495 case IB_CM_MRA_REQ_SENT
:
3496 case IB_CM_REP_RCVD
:
3497 case IB_CM_MRA_REP_SENT
:
3498 case IB_CM_REP_SENT
:
3499 case IB_CM_MRA_REP_RCVD
:
3500 case IB_CM_ESTABLISHED
:
3501 *qp_attr_mask
= IB_QP_STATE
| IB_QP_AV
| IB_QP_PATH_MTU
|
3502 IB_QP_DEST_QPN
| IB_QP_RQ_PSN
;
3503 qp_attr
->ah_attr
= cm_id_priv
->av
.ah_attr
;
3504 qp_attr
->path_mtu
= cm_id_priv
->path_mtu
;
3505 qp_attr
->dest_qp_num
= be32_to_cpu(cm_id_priv
->remote_qpn
);
3506 qp_attr
->rq_psn
= be32_to_cpu(cm_id_priv
->rq_psn
);
3507 if (cm_id_priv
->qp_type
== IB_QPT_RC
||
3508 cm_id_priv
->qp_type
== IB_QPT_XRC_TGT
) {
3509 *qp_attr_mask
|= IB_QP_MAX_DEST_RD_ATOMIC
|
3510 IB_QP_MIN_RNR_TIMER
;
3511 qp_attr
->max_dest_rd_atomic
=
3512 cm_id_priv
->responder_resources
;
3513 qp_attr
->min_rnr_timer
= 0;
3515 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3516 *qp_attr_mask
|= IB_QP_ALT_PATH
;
3517 qp_attr
->alt_port_num
= cm_id_priv
->alt_av
.port
->port_num
;
3518 qp_attr
->alt_pkey_index
= cm_id_priv
->alt_av
.pkey_index
;
3519 qp_attr
->alt_timeout
= cm_id_priv
->alt_av
.timeout
;
3520 qp_attr
->alt_ah_attr
= cm_id_priv
->alt_av
.ah_attr
;
3528 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3532 static int cm_init_qp_rts_attr(struct cm_id_private
*cm_id_priv
,
3533 struct ib_qp_attr
*qp_attr
,
3536 unsigned long flags
;
3539 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3540 switch (cm_id_priv
->id
.state
) {
3541 /* Allow transition to RTS before sending REP */
3542 case IB_CM_REQ_RCVD
:
3543 case IB_CM_MRA_REQ_SENT
:
3545 case IB_CM_REP_RCVD
:
3546 case IB_CM_MRA_REP_SENT
:
3547 case IB_CM_REP_SENT
:
3548 case IB_CM_MRA_REP_RCVD
:
3549 case IB_CM_ESTABLISHED
:
3550 if (cm_id_priv
->id
.lap_state
== IB_CM_LAP_UNINIT
) {
3551 *qp_attr_mask
= IB_QP_STATE
| IB_QP_SQ_PSN
;
3552 qp_attr
->sq_psn
= be32_to_cpu(cm_id_priv
->sq_psn
);
3553 switch (cm_id_priv
->qp_type
) {
3555 case IB_QPT_XRC_INI
:
3556 *qp_attr_mask
|= IB_QP_RETRY_CNT
| IB_QP_RNR_RETRY
|
3557 IB_QP_MAX_QP_RD_ATOMIC
;
3558 qp_attr
->retry_cnt
= cm_id_priv
->retry_count
;
3559 qp_attr
->rnr_retry
= cm_id_priv
->rnr_retry_count
;
3560 qp_attr
->max_rd_atomic
= cm_id_priv
->initiator_depth
;
3562 case IB_QPT_XRC_TGT
:
3563 *qp_attr_mask
|= IB_QP_TIMEOUT
;
3564 qp_attr
->timeout
= cm_id_priv
->av
.timeout
;
3569 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3570 *qp_attr_mask
|= IB_QP_PATH_MIG_STATE
;
3571 qp_attr
->path_mig_state
= IB_MIG_REARM
;
3574 *qp_attr_mask
= IB_QP_ALT_PATH
| IB_QP_PATH_MIG_STATE
;
3575 qp_attr
->alt_port_num
= cm_id_priv
->alt_av
.port
->port_num
;
3576 qp_attr
->alt_pkey_index
= cm_id_priv
->alt_av
.pkey_index
;
3577 qp_attr
->alt_timeout
= cm_id_priv
->alt_av
.timeout
;
3578 qp_attr
->alt_ah_attr
= cm_id_priv
->alt_av
.ah_attr
;
3579 qp_attr
->path_mig_state
= IB_MIG_REARM
;
3587 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3591 int ib_cm_init_qp_attr(struct ib_cm_id
*cm_id
,
3592 struct ib_qp_attr
*qp_attr
,
3595 struct cm_id_private
*cm_id_priv
;
3598 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3599 switch (qp_attr
->qp_state
) {
3601 ret
= cm_init_qp_init_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3604 ret
= cm_init_qp_rtr_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3607 ret
= cm_init_qp_rts_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3615 EXPORT_SYMBOL(ib_cm_init_qp_attr
);
3617 static void cm_get_ack_delay(struct cm_device
*cm_dev
)
3619 struct ib_device_attr attr
;
3621 if (ib_query_device(cm_dev
->ib_device
, &attr
))
3622 cm_dev
->ack_delay
= 0; /* acks will rely on packet life time */
3624 cm_dev
->ack_delay
= attr
.local_ca_ack_delay
;
3627 static ssize_t
cm_show_counter(struct kobject
*obj
, struct attribute
*attr
,
3630 struct cm_counter_group
*group
;
3631 struct cm_counter_attribute
*cm_attr
;
3633 group
= container_of(obj
, struct cm_counter_group
, obj
);
3634 cm_attr
= container_of(attr
, struct cm_counter_attribute
, attr
);
3636 return sprintf(buf
, "%ld\n",
3637 atomic_long_read(&group
->counter
[cm_attr
->index
]));
3640 static const struct sysfs_ops cm_counter_ops
= {
3641 .show
= cm_show_counter
3644 static struct kobj_type cm_counter_obj_type
= {
3645 .sysfs_ops
= &cm_counter_ops
,
3646 .default_attrs
= cm_counter_default_attrs
3649 static void cm_release_port_obj(struct kobject
*obj
)
3651 struct cm_port
*cm_port
;
3653 cm_port
= container_of(obj
, struct cm_port
, port_obj
);
3657 static struct kobj_type cm_port_obj_type
= {
3658 .release
= cm_release_port_obj
3661 static char *cm_devnode(struct device
*dev
, mode_t
*mode
)
3665 return kasprintf(GFP_KERNEL
, "infiniband/%s", dev_name(dev
));
3668 struct class cm_class
= {
3669 .owner
= THIS_MODULE
,
3670 .name
= "infiniband_cm",
3671 .devnode
= cm_devnode
,
3673 EXPORT_SYMBOL(cm_class
);
3675 static int cm_create_port_fs(struct cm_port
*port
)
3679 ret
= kobject_init_and_add(&port
->port_obj
, &cm_port_obj_type
,
3680 &port
->cm_dev
->device
->kobj
,
3681 "%d", port
->port_num
);
3687 for (i
= 0; i
< CM_COUNTER_GROUPS
; i
++) {
3688 ret
= kobject_init_and_add(&port
->counter_group
[i
].obj
,
3689 &cm_counter_obj_type
,
3691 "%s", counter_group_names
[i
]);
3700 kobject_put(&port
->counter_group
[i
].obj
);
3701 kobject_put(&port
->port_obj
);
3706 static void cm_remove_port_fs(struct cm_port
*port
)
3710 for (i
= 0; i
< CM_COUNTER_GROUPS
; i
++)
3711 kobject_put(&port
->counter_group
[i
].obj
);
3713 kobject_put(&port
->port_obj
);
3716 static void cm_add_one(struct ib_device
*ib_device
)
3718 struct cm_device
*cm_dev
;
3719 struct cm_port
*port
;
3720 struct ib_mad_reg_req reg_req
= {
3721 .mgmt_class
= IB_MGMT_CLASS_CM
,
3722 .mgmt_class_version
= IB_CM_CLASS_VERSION
3724 struct ib_port_modify port_modify
= {
3725 .set_port_cap_mask
= IB_PORT_CM_SUP
3727 unsigned long flags
;
3731 if (rdma_node_get_transport(ib_device
->node_type
) != RDMA_TRANSPORT_IB
)
3734 cm_dev
= kzalloc(sizeof(*cm_dev
) + sizeof(*port
) *
3735 ib_device
->phys_port_cnt
, GFP_KERNEL
);
3739 cm_dev
->ib_device
= ib_device
;
3740 cm_get_ack_delay(cm_dev
);
3742 cm_dev
->device
= device_create(&cm_class
, &ib_device
->dev
,
3744 "%s", ib_device
->name
);
3745 if (IS_ERR(cm_dev
->device
)) {
3750 set_bit(IB_MGMT_METHOD_SEND
, reg_req
.method_mask
);
3751 for (i
= 1; i
<= ib_device
->phys_port_cnt
; i
++) {
3752 port
= kzalloc(sizeof *port
, GFP_KERNEL
);
3756 cm_dev
->port
[i
-1] = port
;
3757 port
->cm_dev
= cm_dev
;
3760 ret
= cm_create_port_fs(port
);
3764 port
->mad_agent
= ib_register_mad_agent(ib_device
, i
,
3771 if (IS_ERR(port
->mad_agent
))
3774 ret
= ib_modify_port(ib_device
, i
, 0, &port_modify
);
3778 ib_set_client_data(ib_device
, &cm_client
, cm_dev
);
3780 write_lock_irqsave(&cm
.device_lock
, flags
);
3781 list_add_tail(&cm_dev
->list
, &cm
.device_list
);
3782 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3786 ib_unregister_mad_agent(port
->mad_agent
);
3788 cm_remove_port_fs(port
);
3790 port_modify
.set_port_cap_mask
= 0;
3791 port_modify
.clr_port_cap_mask
= IB_PORT_CM_SUP
;
3793 port
= cm_dev
->port
[i
-1];
3794 ib_modify_port(ib_device
, port
->port_num
, 0, &port_modify
);
3795 ib_unregister_mad_agent(port
->mad_agent
);
3796 cm_remove_port_fs(port
);
3798 device_unregister(cm_dev
->device
);
3802 static void cm_remove_one(struct ib_device
*ib_device
)
3804 struct cm_device
*cm_dev
;
3805 struct cm_port
*port
;
3806 struct ib_port_modify port_modify
= {
3807 .clr_port_cap_mask
= IB_PORT_CM_SUP
3809 unsigned long flags
;
3812 cm_dev
= ib_get_client_data(ib_device
, &cm_client
);
3816 write_lock_irqsave(&cm
.device_lock
, flags
);
3817 list_del(&cm_dev
->list
);
3818 write_unlock_irqrestore(&cm
.device_lock
, flags
);
3820 for (i
= 1; i
<= ib_device
->phys_port_cnt
; i
++) {
3821 port
= cm_dev
->port
[i
-1];
3822 ib_modify_port(ib_device
, port
->port_num
, 0, &port_modify
);
3823 ib_unregister_mad_agent(port
->mad_agent
);
3824 flush_workqueue(cm
.wq
);
3825 cm_remove_port_fs(port
);
3827 device_unregister(cm_dev
->device
);
3831 static int __init
ib_cm_init(void)
3835 memset(&cm
, 0, sizeof cm
);
3836 INIT_LIST_HEAD(&cm
.device_list
);
3837 rwlock_init(&cm
.device_lock
);
3838 spin_lock_init(&cm
.lock
);
3839 cm
.listen_service_table
= RB_ROOT
;
3840 cm
.listen_service_id
= be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID
);
3841 cm
.remote_id_table
= RB_ROOT
;
3842 cm
.remote_qp_table
= RB_ROOT
;
3843 cm
.remote_sidr_table
= RB_ROOT
;
3844 idr_init(&cm
.local_id_table
);
3845 get_random_bytes(&cm
.random_id_operand
, sizeof cm
.random_id_operand
);
3846 idr_pre_get(&cm
.local_id_table
, GFP_KERNEL
);
3847 INIT_LIST_HEAD(&cm
.timewait_list
);
3849 ret
= class_register(&cm_class
);
3853 cm
.wq
= create_workqueue("ib_cm");
3859 ret
= ib_register_client(&cm_client
);
3865 destroy_workqueue(cm
.wq
);
3867 class_unregister(&cm_class
);
3871 static void __exit
ib_cm_cleanup(void)
3873 struct cm_timewait_info
*timewait_info
, *tmp
;
3875 spin_lock_irq(&cm
.lock
);
3876 list_for_each_entry(timewait_info
, &cm
.timewait_list
, list
)
3877 cancel_delayed_work(&timewait_info
->work
.work
);
3878 spin_unlock_irq(&cm
.lock
);
3880 ib_unregister_client(&cm_client
);
3881 destroy_workqueue(cm
.wq
);
3883 list_for_each_entry_safe(timewait_info
, tmp
, &cm
.timewait_list
, list
) {
3884 list_del(&timewait_info
->list
);
3885 kfree(timewait_info
);
3888 class_unregister(&cm_class
);
3889 idr_destroy(&cm
.local_id_table
);
3892 module_init(ib_cm_init
);
3893 module_exit(ib_cm_cleanup
);