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/module.h>
40 #include <linux/err.h>
41 #include <linux/idr.h>
42 #include <linux/interrupt.h>
43 #include <linux/random.h>
44 #include <linux/rbtree.h>
45 #include <linux/spinlock.h>
46 #include <linux/slab.h>
47 #include <linux/sysfs.h>
48 #include <linux/workqueue.h>
49 #include <linux/kdev_t.h>
50 #include <linux/etherdevice.h>
52 #include <rdma/ib_cache.h>
53 #include <rdma/ib_cm.h>
56 MODULE_AUTHOR("Sean Hefty");
57 MODULE_DESCRIPTION("InfiniBand CM");
58 MODULE_LICENSE("Dual BSD/GPL");
60 static void cm_add_one(struct ib_device
*device
);
61 static void cm_remove_one(struct ib_device
*device
, void *client_data
);
63 static struct ib_client cm_client
= {
66 .remove
= cm_remove_one
71 struct list_head device_list
;
73 struct rb_root listen_service_table
;
74 u64 listen_service_id
;
75 /* struct rb_root peer_service_table; todo: fix peer to peer */
76 struct rb_root remote_qp_table
;
77 struct rb_root remote_id_table
;
78 struct rb_root remote_sidr_table
;
79 struct idr local_id_table
;
80 __be32 random_id_operand
;
81 struct list_head timewait_list
;
82 struct workqueue_struct
*wq
;
83 /* Sync on cm change port state */
84 spinlock_t state_lock
;
87 /* Counter indexes ordered by attribute ID */
101 CM_ATTR_ID_OFFSET
= 0x0010,
112 static char const counter_group_names
[CM_COUNTER_GROUPS
]
113 [sizeof("cm_rx_duplicates")] = {
114 "cm_tx_msgs", "cm_tx_retries",
115 "cm_rx_msgs", "cm_rx_duplicates"
118 struct cm_counter_group
{
120 atomic_long_t counter
[CM_ATTR_COUNT
];
123 struct cm_counter_attribute
{
124 struct attribute attr
;
128 #define CM_COUNTER_ATTR(_name, _index) \
129 struct cm_counter_attribute cm_##_name##_counter_attr = { \
130 .attr = { .name = __stringify(_name), .mode = 0444 }, \
134 static CM_COUNTER_ATTR(req
, CM_REQ_COUNTER
);
135 static CM_COUNTER_ATTR(mra
, CM_MRA_COUNTER
);
136 static CM_COUNTER_ATTR(rej
, CM_REJ_COUNTER
);
137 static CM_COUNTER_ATTR(rep
, CM_REP_COUNTER
);
138 static CM_COUNTER_ATTR(rtu
, CM_RTU_COUNTER
);
139 static CM_COUNTER_ATTR(dreq
, CM_DREQ_COUNTER
);
140 static CM_COUNTER_ATTR(drep
, CM_DREP_COUNTER
);
141 static CM_COUNTER_ATTR(sidr_req
, CM_SIDR_REQ_COUNTER
);
142 static CM_COUNTER_ATTR(sidr_rep
, CM_SIDR_REP_COUNTER
);
143 static CM_COUNTER_ATTR(lap
, CM_LAP_COUNTER
);
144 static CM_COUNTER_ATTR(apr
, CM_APR_COUNTER
);
146 static struct attribute
*cm_counter_default_attrs
[] = {
147 &cm_req_counter_attr
.attr
,
148 &cm_mra_counter_attr
.attr
,
149 &cm_rej_counter_attr
.attr
,
150 &cm_rep_counter_attr
.attr
,
151 &cm_rtu_counter_attr
.attr
,
152 &cm_dreq_counter_attr
.attr
,
153 &cm_drep_counter_attr
.attr
,
154 &cm_sidr_req_counter_attr
.attr
,
155 &cm_sidr_rep_counter_attr
.attr
,
156 &cm_lap_counter_attr
.attr
,
157 &cm_apr_counter_attr
.attr
,
162 struct cm_device
*cm_dev
;
163 struct ib_mad_agent
*mad_agent
;
164 struct kobject port_obj
;
166 struct list_head cm_priv_prim_list
;
167 struct list_head cm_priv_altr_list
;
168 struct cm_counter_group counter_group
[CM_COUNTER_GROUPS
];
172 struct list_head list
;
173 struct ib_device
*ib_device
;
174 struct device
*device
;
177 struct cm_port
*port
[0];
181 struct cm_port
*port
;
183 struct ib_ah_attr ah_attr
;
189 struct delayed_work work
;
190 struct list_head list
;
191 struct cm_port
*port
;
192 struct ib_mad_recv_wc
*mad_recv_wc
; /* Received MADs */
193 __be32 local_id
; /* Established / timewait */
195 struct ib_cm_event cm_event
;
196 struct ib_sa_path_rec path
[0];
199 struct cm_timewait_info
{
200 struct cm_work work
; /* Must be first. */
201 struct list_head list
;
202 struct rb_node remote_qp_node
;
203 struct rb_node remote_id_node
;
204 __be64 remote_ca_guid
;
206 u8 inserted_remote_qp
;
207 u8 inserted_remote_id
;
210 struct cm_id_private
{
213 struct rb_node service_node
;
214 struct rb_node sidr_id_node
;
215 spinlock_t lock
; /* Do not acquire inside cm.lock */
216 struct completion comp
;
218 /* Number of clients sharing this ib_cm_id. Only valid for listeners.
219 * Protected by the cm.lock spinlock. */
220 int listen_sharecount
;
222 struct ib_mad_send_buf
*msg
;
223 struct cm_timewait_info
*timewait_info
;
224 /* todo: use alternate port on send failure */
232 enum ib_qp_type qp_type
;
236 enum ib_mtu path_mtu
;
241 u8 responder_resources
;
248 struct list_head prim_list
;
249 struct list_head altr_list
;
250 /* Indicates that the send port mad is registered and av is set */
251 int prim_send_port_not_ready
;
252 int altr_send_port_not_ready
;
254 struct list_head work_list
;
258 static void cm_work_handler(struct work_struct
*work
);
260 static inline void cm_deref_id(struct cm_id_private
*cm_id_priv
)
262 if (atomic_dec_and_test(&cm_id_priv
->refcount
))
263 complete(&cm_id_priv
->comp
);
266 static int cm_alloc_msg(struct cm_id_private
*cm_id_priv
,
267 struct ib_mad_send_buf
**msg
)
269 struct ib_mad_agent
*mad_agent
;
270 struct ib_mad_send_buf
*m
;
273 unsigned long flags
, flags2
;
276 /* don't let the port to be released till the agent is down */
277 spin_lock_irqsave(&cm
.state_lock
, flags2
);
278 spin_lock_irqsave(&cm
.lock
, flags
);
279 if (!cm_id_priv
->prim_send_port_not_ready
)
280 av
= &cm_id_priv
->av
;
281 else if (!cm_id_priv
->altr_send_port_not_ready
&&
282 (cm_id_priv
->alt_av
.port
))
283 av
= &cm_id_priv
->alt_av
;
285 pr_info("%s: not valid CM id\n", __func__
);
287 spin_unlock_irqrestore(&cm
.lock
, flags
);
290 spin_unlock_irqrestore(&cm
.lock
, flags
);
291 /* Make sure the port haven't released the mad yet */
292 mad_agent
= cm_id_priv
->av
.port
->mad_agent
;
294 pr_info("%s: not a valid MAD agent\n", __func__
);
298 ah
= ib_create_ah(mad_agent
->qp
->pd
, &av
->ah_attr
);
304 m
= ib_create_send_mad(mad_agent
, cm_id_priv
->id
.remote_cm_qpn
,
306 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
308 IB_MGMT_BASE_VERSION
);
315 /* Timeout set by caller if response is expected. */
317 m
->retries
= cm_id_priv
->max_cm_retries
;
319 atomic_inc(&cm_id_priv
->refcount
);
320 m
->context
[0] = cm_id_priv
;
324 spin_unlock_irqrestore(&cm
.state_lock
, flags2
);
328 static int cm_alloc_response_msg(struct cm_port
*port
,
329 struct ib_mad_recv_wc
*mad_recv_wc
,
330 struct ib_mad_send_buf
**msg
)
332 struct ib_mad_send_buf
*m
;
335 ah
= ib_create_ah_from_wc(port
->mad_agent
->qp
->pd
, mad_recv_wc
->wc
,
336 mad_recv_wc
->recv_buf
.grh
, port
->port_num
);
340 m
= ib_create_send_mad(port
->mad_agent
, 1, mad_recv_wc
->wc
->pkey_index
,
341 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
343 IB_MGMT_BASE_VERSION
);
353 static void cm_free_msg(struct ib_mad_send_buf
*msg
)
355 ib_destroy_ah(msg
->ah
);
357 cm_deref_id(msg
->context
[0]);
358 ib_free_send_mad(msg
);
361 static void * cm_copy_private_data(const void *private_data
,
366 if (!private_data
|| !private_data_len
)
369 data
= kmemdup(private_data
, private_data_len
, GFP_KERNEL
);
371 return ERR_PTR(-ENOMEM
);
376 static void cm_set_private_data(struct cm_id_private
*cm_id_priv
,
377 void *private_data
, u8 private_data_len
)
379 if (cm_id_priv
->private_data
&& cm_id_priv
->private_data_len
)
380 kfree(cm_id_priv
->private_data
);
382 cm_id_priv
->private_data
= private_data
;
383 cm_id_priv
->private_data_len
= private_data_len
;
386 static void cm_init_av_for_response(struct cm_port
*port
, struct ib_wc
*wc
,
387 struct ib_grh
*grh
, struct cm_av
*av
)
390 av
->pkey_index
= wc
->pkey_index
;
391 ib_init_ah_from_wc(port
->cm_dev
->ib_device
, port
->port_num
, wc
,
395 static int cm_init_av_by_path(struct ib_sa_path_rec
*path
, struct cm_av
*av
,
396 struct cm_id_private
*cm_id_priv
)
398 struct cm_device
*cm_dev
;
399 struct cm_port
*port
= NULL
;
403 struct net_device
*ndev
= ib_get_ndev_from_path(path
);
405 read_lock_irqsave(&cm
.device_lock
, flags
);
406 list_for_each_entry(cm_dev
, &cm
.device_list
, list
) {
407 if (!ib_find_cached_gid(cm_dev
->ib_device
, &path
->sgid
,
408 path
->gid_type
, ndev
, &p
, NULL
)) {
409 port
= cm_dev
->port
[p
-1];
413 read_unlock_irqrestore(&cm
.device_lock
, flags
);
421 ret
= ib_find_cached_pkey(cm_dev
->ib_device
, port
->port_num
,
422 be16_to_cpu(path
->pkey
), &av
->pkey_index
);
427 ib_init_ah_from_path(cm_dev
->ib_device
, port
->port_num
, path
,
429 av
->timeout
= path
->packet_life_time
+ 1;
431 spin_lock_irqsave(&cm
.lock
, flags
);
432 if (&cm_id_priv
->av
== av
)
433 list_add_tail(&cm_id_priv
->prim_list
, &port
->cm_priv_prim_list
);
434 else if (&cm_id_priv
->alt_av
== av
)
435 list_add_tail(&cm_id_priv
->altr_list
, &port
->cm_priv_altr_list
);
439 spin_unlock_irqrestore(&cm
.lock
, flags
);
444 static int cm_alloc_id(struct cm_id_private
*cm_id_priv
)
449 idr_preload(GFP_KERNEL
);
450 spin_lock_irqsave(&cm
.lock
, flags
);
452 id
= idr_alloc_cyclic(&cm
.local_id_table
, cm_id_priv
, 0, 0, GFP_NOWAIT
);
454 spin_unlock_irqrestore(&cm
.lock
, flags
);
457 cm_id_priv
->id
.local_id
= (__force __be32
)id
^ cm
.random_id_operand
;
458 return id
< 0 ? id
: 0;
461 static void cm_free_id(__be32 local_id
)
463 spin_lock_irq(&cm
.lock
);
464 idr_remove(&cm
.local_id_table
,
465 (__force
int) (local_id
^ cm
.random_id_operand
));
466 spin_unlock_irq(&cm
.lock
);
469 static struct cm_id_private
* cm_get_id(__be32 local_id
, __be32 remote_id
)
471 struct cm_id_private
*cm_id_priv
;
473 cm_id_priv
= idr_find(&cm
.local_id_table
,
474 (__force
int) (local_id
^ cm
.random_id_operand
));
476 if (cm_id_priv
->id
.remote_id
== remote_id
)
477 atomic_inc(&cm_id_priv
->refcount
);
485 static struct cm_id_private
* cm_acquire_id(__be32 local_id
, __be32 remote_id
)
487 struct cm_id_private
*cm_id_priv
;
489 spin_lock_irq(&cm
.lock
);
490 cm_id_priv
= cm_get_id(local_id
, remote_id
);
491 spin_unlock_irq(&cm
.lock
);
497 * Trivial helpers to strip endian annotation and compare; the
498 * endianness doesn't actually matter since we just need a stable
499 * order for the RB tree.
501 static int be32_lt(__be32 a
, __be32 b
)
503 return (__force u32
) a
< (__force u32
) b
;
506 static int be32_gt(__be32 a
, __be32 b
)
508 return (__force u32
) a
> (__force u32
) b
;
511 static int be64_lt(__be64 a
, __be64 b
)
513 return (__force u64
) a
< (__force u64
) b
;
516 static int be64_gt(__be64 a
, __be64 b
)
518 return (__force u64
) a
> (__force u64
) b
;
521 static struct cm_id_private
* cm_insert_listen(struct cm_id_private
*cm_id_priv
)
523 struct rb_node
**link
= &cm
.listen_service_table
.rb_node
;
524 struct rb_node
*parent
= NULL
;
525 struct cm_id_private
*cur_cm_id_priv
;
526 __be64 service_id
= cm_id_priv
->id
.service_id
;
527 __be64 service_mask
= cm_id_priv
->id
.service_mask
;
531 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
533 if ((cur_cm_id_priv
->id
.service_mask
& service_id
) ==
534 (service_mask
& cur_cm_id_priv
->id
.service_id
) &&
535 (cm_id_priv
->id
.device
== cur_cm_id_priv
->id
.device
))
536 return cur_cm_id_priv
;
538 if (cm_id_priv
->id
.device
< cur_cm_id_priv
->id
.device
)
539 link
= &(*link
)->rb_left
;
540 else if (cm_id_priv
->id
.device
> cur_cm_id_priv
->id
.device
)
541 link
= &(*link
)->rb_right
;
542 else if (be64_lt(service_id
, cur_cm_id_priv
->id
.service_id
))
543 link
= &(*link
)->rb_left
;
544 else if (be64_gt(service_id
, cur_cm_id_priv
->id
.service_id
))
545 link
= &(*link
)->rb_right
;
547 link
= &(*link
)->rb_right
;
549 rb_link_node(&cm_id_priv
->service_node
, parent
, link
);
550 rb_insert_color(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
554 static struct cm_id_private
* cm_find_listen(struct ib_device
*device
,
557 struct rb_node
*node
= cm
.listen_service_table
.rb_node
;
558 struct cm_id_private
*cm_id_priv
;
561 cm_id_priv
= rb_entry(node
, struct cm_id_private
, service_node
);
562 if ((cm_id_priv
->id
.service_mask
& service_id
) ==
563 cm_id_priv
->id
.service_id
&&
564 (cm_id_priv
->id
.device
== device
))
567 if (device
< cm_id_priv
->id
.device
)
568 node
= node
->rb_left
;
569 else if (device
> cm_id_priv
->id
.device
)
570 node
= node
->rb_right
;
571 else if (be64_lt(service_id
, cm_id_priv
->id
.service_id
))
572 node
= node
->rb_left
;
573 else if (be64_gt(service_id
, cm_id_priv
->id
.service_id
))
574 node
= node
->rb_right
;
576 node
= node
->rb_right
;
581 static struct cm_timewait_info
* cm_insert_remote_id(struct cm_timewait_info
584 struct rb_node
**link
= &cm
.remote_id_table
.rb_node
;
585 struct rb_node
*parent
= NULL
;
586 struct cm_timewait_info
*cur_timewait_info
;
587 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
588 __be32 remote_id
= timewait_info
->work
.remote_id
;
592 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
594 if (be32_lt(remote_id
, cur_timewait_info
->work
.remote_id
))
595 link
= &(*link
)->rb_left
;
596 else if (be32_gt(remote_id
, cur_timewait_info
->work
.remote_id
))
597 link
= &(*link
)->rb_right
;
598 else if (be64_lt(remote_ca_guid
, cur_timewait_info
->remote_ca_guid
))
599 link
= &(*link
)->rb_left
;
600 else if (be64_gt(remote_ca_guid
, cur_timewait_info
->remote_ca_guid
))
601 link
= &(*link
)->rb_right
;
603 return cur_timewait_info
;
605 timewait_info
->inserted_remote_id
= 1;
606 rb_link_node(&timewait_info
->remote_id_node
, parent
, link
);
607 rb_insert_color(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
611 static struct cm_timewait_info
* cm_find_remote_id(__be64 remote_ca_guid
,
614 struct rb_node
*node
= cm
.remote_id_table
.rb_node
;
615 struct cm_timewait_info
*timewait_info
;
618 timewait_info
= rb_entry(node
, struct cm_timewait_info
,
620 if (be32_lt(remote_id
, timewait_info
->work
.remote_id
))
621 node
= node
->rb_left
;
622 else if (be32_gt(remote_id
, timewait_info
->work
.remote_id
))
623 node
= node
->rb_right
;
624 else if (be64_lt(remote_ca_guid
, timewait_info
->remote_ca_guid
))
625 node
= node
->rb_left
;
626 else if (be64_gt(remote_ca_guid
, timewait_info
->remote_ca_guid
))
627 node
= node
->rb_right
;
629 return timewait_info
;
634 static struct cm_timewait_info
* cm_insert_remote_qpn(struct cm_timewait_info
637 struct rb_node
**link
= &cm
.remote_qp_table
.rb_node
;
638 struct rb_node
*parent
= NULL
;
639 struct cm_timewait_info
*cur_timewait_info
;
640 __be64 remote_ca_guid
= timewait_info
->remote_ca_guid
;
641 __be32 remote_qpn
= timewait_info
->remote_qpn
;
645 cur_timewait_info
= rb_entry(parent
, struct cm_timewait_info
,
647 if (be32_lt(remote_qpn
, cur_timewait_info
->remote_qpn
))
648 link
= &(*link
)->rb_left
;
649 else if (be32_gt(remote_qpn
, cur_timewait_info
->remote_qpn
))
650 link
= &(*link
)->rb_right
;
651 else if (be64_lt(remote_ca_guid
, cur_timewait_info
->remote_ca_guid
))
652 link
= &(*link
)->rb_left
;
653 else if (be64_gt(remote_ca_guid
, cur_timewait_info
->remote_ca_guid
))
654 link
= &(*link
)->rb_right
;
656 return cur_timewait_info
;
658 timewait_info
->inserted_remote_qp
= 1;
659 rb_link_node(&timewait_info
->remote_qp_node
, parent
, link
);
660 rb_insert_color(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
664 static struct cm_id_private
* cm_insert_remote_sidr(struct cm_id_private
667 struct rb_node
**link
= &cm
.remote_sidr_table
.rb_node
;
668 struct rb_node
*parent
= NULL
;
669 struct cm_id_private
*cur_cm_id_priv
;
670 union ib_gid
*port_gid
= &cm_id_priv
->av
.dgid
;
671 __be32 remote_id
= cm_id_priv
->id
.remote_id
;
675 cur_cm_id_priv
= rb_entry(parent
, struct cm_id_private
,
677 if (be32_lt(remote_id
, cur_cm_id_priv
->id
.remote_id
))
678 link
= &(*link
)->rb_left
;
679 else if (be32_gt(remote_id
, cur_cm_id_priv
->id
.remote_id
))
680 link
= &(*link
)->rb_right
;
683 cmp
= memcmp(port_gid
, &cur_cm_id_priv
->av
.dgid
,
686 link
= &(*link
)->rb_left
;
688 link
= &(*link
)->rb_right
;
690 return cur_cm_id_priv
;
693 rb_link_node(&cm_id_priv
->sidr_id_node
, parent
, link
);
694 rb_insert_color(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
698 static void cm_reject_sidr_req(struct cm_id_private
*cm_id_priv
,
699 enum ib_cm_sidr_status status
)
701 struct ib_cm_sidr_rep_param param
;
703 memset(¶m
, 0, sizeof param
);
704 param
.status
= status
;
705 ib_send_cm_sidr_rep(&cm_id_priv
->id
, ¶m
);
708 struct ib_cm_id
*ib_create_cm_id(struct ib_device
*device
,
709 ib_cm_handler cm_handler
,
712 struct cm_id_private
*cm_id_priv
;
715 cm_id_priv
= kzalloc(sizeof *cm_id_priv
, GFP_KERNEL
);
717 return ERR_PTR(-ENOMEM
);
719 cm_id_priv
->id
.state
= IB_CM_IDLE
;
720 cm_id_priv
->id
.device
= device
;
721 cm_id_priv
->id
.cm_handler
= cm_handler
;
722 cm_id_priv
->id
.context
= context
;
723 cm_id_priv
->id
.remote_cm_qpn
= 1;
724 ret
= cm_alloc_id(cm_id_priv
);
728 spin_lock_init(&cm_id_priv
->lock
);
729 init_completion(&cm_id_priv
->comp
);
730 INIT_LIST_HEAD(&cm_id_priv
->work_list
);
731 INIT_LIST_HEAD(&cm_id_priv
->prim_list
);
732 INIT_LIST_HEAD(&cm_id_priv
->altr_list
);
733 atomic_set(&cm_id_priv
->work_count
, -1);
734 atomic_set(&cm_id_priv
->refcount
, 1);
735 return &cm_id_priv
->id
;
739 return ERR_PTR(-ENOMEM
);
741 EXPORT_SYMBOL(ib_create_cm_id
);
743 static struct cm_work
* cm_dequeue_work(struct cm_id_private
*cm_id_priv
)
745 struct cm_work
*work
;
747 if (list_empty(&cm_id_priv
->work_list
))
750 work
= list_entry(cm_id_priv
->work_list
.next
, struct cm_work
, list
);
751 list_del(&work
->list
);
755 static void cm_free_work(struct cm_work
*work
)
757 if (work
->mad_recv_wc
)
758 ib_free_recv_mad(work
->mad_recv_wc
);
762 static inline int cm_convert_to_ms(int iba_time
)
764 /* approximate conversion to ms from 4.096us x 2^iba_time */
765 return 1 << max(iba_time
- 8, 0);
769 * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
770 * Because of how ack_timeout is stored, adding one doubles the timeout.
771 * To avoid large timeouts, select the max(ack_delay, life_time + 1), and
772 * increment it (round up) only if the other is within 50%.
774 static u8
cm_ack_timeout(u8 ca_ack_delay
, u8 packet_life_time
)
776 int ack_timeout
= packet_life_time
+ 1;
778 if (ack_timeout
>= ca_ack_delay
)
779 ack_timeout
+= (ca_ack_delay
>= (ack_timeout
- 1));
781 ack_timeout
= ca_ack_delay
+
782 (ack_timeout
>= (ca_ack_delay
- 1));
784 return min(31, ack_timeout
);
787 static void cm_cleanup_timewait(struct cm_timewait_info
*timewait_info
)
789 if (timewait_info
->inserted_remote_id
) {
790 rb_erase(&timewait_info
->remote_id_node
, &cm
.remote_id_table
);
791 timewait_info
->inserted_remote_id
= 0;
794 if (timewait_info
->inserted_remote_qp
) {
795 rb_erase(&timewait_info
->remote_qp_node
, &cm
.remote_qp_table
);
796 timewait_info
->inserted_remote_qp
= 0;
800 static struct cm_timewait_info
* cm_create_timewait_info(__be32 local_id
)
802 struct cm_timewait_info
*timewait_info
;
804 timewait_info
= kzalloc(sizeof *timewait_info
, GFP_KERNEL
);
806 return ERR_PTR(-ENOMEM
);
808 timewait_info
->work
.local_id
= local_id
;
809 INIT_DELAYED_WORK(&timewait_info
->work
.work
, cm_work_handler
);
810 timewait_info
->work
.cm_event
.event
= IB_CM_TIMEWAIT_EXIT
;
811 return timewait_info
;
814 static void cm_enter_timewait(struct cm_id_private
*cm_id_priv
)
818 struct cm_device
*cm_dev
;
820 cm_dev
= ib_get_client_data(cm_id_priv
->id
.device
, &cm_client
);
824 spin_lock_irqsave(&cm
.lock
, flags
);
825 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
826 list_add_tail(&cm_id_priv
->timewait_info
->list
, &cm
.timewait_list
);
827 spin_unlock_irqrestore(&cm
.lock
, flags
);
830 * The cm_id could be destroyed by the user before we exit timewait.
831 * To protect against this, we search for the cm_id after exiting
832 * timewait before notifying the user that we've exited timewait.
834 cm_id_priv
->id
.state
= IB_CM_TIMEWAIT
;
835 wait_time
= cm_convert_to_ms(cm_id_priv
->av
.timeout
);
837 /* Check if the device started its remove_one */
838 spin_lock_irqsave(&cm
.lock
, flags
);
839 if (!cm_dev
->going_down
)
840 queue_delayed_work(cm
.wq
, &cm_id_priv
->timewait_info
->work
.work
,
841 msecs_to_jiffies(wait_time
));
842 spin_unlock_irqrestore(&cm
.lock
, flags
);
844 cm_id_priv
->timewait_info
= NULL
;
847 static void cm_reset_to_idle(struct cm_id_private
*cm_id_priv
)
851 cm_id_priv
->id
.state
= IB_CM_IDLE
;
852 if (cm_id_priv
->timewait_info
) {
853 spin_lock_irqsave(&cm
.lock
, flags
);
854 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
855 spin_unlock_irqrestore(&cm
.lock
, flags
);
856 kfree(cm_id_priv
->timewait_info
);
857 cm_id_priv
->timewait_info
= NULL
;
861 static void cm_destroy_id(struct ib_cm_id
*cm_id
, int err
)
863 struct cm_id_private
*cm_id_priv
;
864 struct cm_work
*work
;
866 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
868 spin_lock_irq(&cm_id_priv
->lock
);
869 switch (cm_id
->state
) {
871 spin_unlock_irq(&cm_id_priv
->lock
);
873 spin_lock_irq(&cm
.lock
);
874 if (--cm_id_priv
->listen_sharecount
> 0) {
875 /* The id is still shared. */
876 cm_deref_id(cm_id_priv
);
877 spin_unlock_irq(&cm
.lock
);
880 rb_erase(&cm_id_priv
->service_node
, &cm
.listen_service_table
);
881 spin_unlock_irq(&cm
.lock
);
883 case IB_CM_SIDR_REQ_SENT
:
884 cm_id
->state
= IB_CM_IDLE
;
885 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
886 spin_unlock_irq(&cm_id_priv
->lock
);
888 case IB_CM_SIDR_REQ_RCVD
:
889 spin_unlock_irq(&cm_id_priv
->lock
);
890 cm_reject_sidr_req(cm_id_priv
, IB_SIDR_REJECT
);
891 spin_lock_irq(&cm
.lock
);
892 if (!RB_EMPTY_NODE(&cm_id_priv
->sidr_id_node
))
893 rb_erase(&cm_id_priv
->sidr_id_node
,
894 &cm
.remote_sidr_table
);
895 spin_unlock_irq(&cm
.lock
);
898 case IB_CM_MRA_REQ_RCVD
:
899 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
900 spin_unlock_irq(&cm_id_priv
->lock
);
901 ib_send_cm_rej(cm_id
, IB_CM_REJ_TIMEOUT
,
902 &cm_id_priv
->id
.device
->node_guid
,
903 sizeof cm_id_priv
->id
.device
->node_guid
,
907 if (err
== -ENOMEM
) {
908 /* Do not reject to allow future retries. */
909 cm_reset_to_idle(cm_id_priv
);
910 spin_unlock_irq(&cm_id_priv
->lock
);
912 spin_unlock_irq(&cm_id_priv
->lock
);
913 ib_send_cm_rej(cm_id
, IB_CM_REJ_CONSUMER_DEFINED
,
918 case IB_CM_MRA_REP_RCVD
:
919 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
921 case IB_CM_MRA_REQ_SENT
:
923 case IB_CM_MRA_REP_SENT
:
924 spin_unlock_irq(&cm_id_priv
->lock
);
925 ib_send_cm_rej(cm_id
, IB_CM_REJ_CONSUMER_DEFINED
,
928 case IB_CM_ESTABLISHED
:
929 spin_unlock_irq(&cm_id_priv
->lock
);
930 if (cm_id_priv
->qp_type
== IB_QPT_XRC_TGT
)
932 ib_send_cm_dreq(cm_id
, NULL
, 0);
934 case IB_CM_DREQ_SENT
:
935 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
936 cm_enter_timewait(cm_id_priv
);
937 spin_unlock_irq(&cm_id_priv
->lock
);
939 case IB_CM_DREQ_RCVD
:
940 spin_unlock_irq(&cm_id_priv
->lock
);
941 ib_send_cm_drep(cm_id
, NULL
, 0);
944 spin_unlock_irq(&cm_id_priv
->lock
);
948 spin_lock_irq(&cm
.lock
);
949 if (!list_empty(&cm_id_priv
->altr_list
) &&
950 (!cm_id_priv
->altr_send_port_not_ready
))
951 list_del(&cm_id_priv
->altr_list
);
952 if (!list_empty(&cm_id_priv
->prim_list
) &&
953 (!cm_id_priv
->prim_send_port_not_ready
))
954 list_del(&cm_id_priv
->prim_list
);
955 spin_unlock_irq(&cm
.lock
);
957 cm_free_id(cm_id
->local_id
);
958 cm_deref_id(cm_id_priv
);
959 wait_for_completion(&cm_id_priv
->comp
);
960 while ((work
= cm_dequeue_work(cm_id_priv
)) != NULL
)
962 kfree(cm_id_priv
->private_data
);
966 void ib_destroy_cm_id(struct ib_cm_id
*cm_id
)
968 cm_destroy_id(cm_id
, 0);
970 EXPORT_SYMBOL(ib_destroy_cm_id
);
973 * __ib_cm_listen - Initiates listening on the specified service ID for
974 * connection and service ID resolution requests.
975 * @cm_id: Connection identifier associated with the listen request.
976 * @service_id: Service identifier matched against incoming connection
977 * and service ID resolution requests. The service ID should be specified
978 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
979 * assign a service ID to the caller.
980 * @service_mask: Mask applied to service ID used to listen across a
981 * range of service IDs. If set to 0, the service ID is matched
982 * exactly. This parameter is ignored if %service_id is set to
983 * IB_CM_ASSIGN_SERVICE_ID.
985 static int __ib_cm_listen(struct ib_cm_id
*cm_id
, __be64 service_id
,
988 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
991 service_mask
= service_mask
? service_mask
: ~cpu_to_be64(0);
992 service_id
&= service_mask
;
993 if ((service_id
& IB_SERVICE_ID_AGN_MASK
) == IB_CM_ASSIGN_SERVICE_ID
&&
994 (service_id
!= IB_CM_ASSIGN_SERVICE_ID
))
997 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
998 if (cm_id
->state
!= IB_CM_IDLE
)
1001 cm_id
->state
= IB_CM_LISTEN
;
1002 ++cm_id_priv
->listen_sharecount
;
1004 if (service_id
== IB_CM_ASSIGN_SERVICE_ID
) {
1005 cm_id
->service_id
= cpu_to_be64(cm
.listen_service_id
++);
1006 cm_id
->service_mask
= ~cpu_to_be64(0);
1008 cm_id
->service_id
= service_id
;
1009 cm_id
->service_mask
= service_mask
;
1011 cur_cm_id_priv
= cm_insert_listen(cm_id_priv
);
1013 if (cur_cm_id_priv
) {
1014 cm_id
->state
= IB_CM_IDLE
;
1015 --cm_id_priv
->listen_sharecount
;
1021 int ib_cm_listen(struct ib_cm_id
*cm_id
, __be64 service_id
, __be64 service_mask
)
1023 unsigned long flags
;
1026 spin_lock_irqsave(&cm
.lock
, flags
);
1027 ret
= __ib_cm_listen(cm_id
, service_id
, service_mask
);
1028 spin_unlock_irqrestore(&cm
.lock
, flags
);
1032 EXPORT_SYMBOL(ib_cm_listen
);
1035 * Create a new listening ib_cm_id and listen on the given service ID.
1037 * If there's an existing ID listening on that same device and service ID,
1040 * @device: Device associated with the cm_id. All related communication will
1041 * be associated with the specified device.
1042 * @cm_handler: Callback invoked to notify the user of CM events.
1043 * @service_id: Service identifier matched against incoming connection
1044 * and service ID resolution requests. The service ID should be specified
1045 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
1046 * assign a service ID to the caller.
1048 * Callers should call ib_destroy_cm_id when done with the listener ID.
1050 struct ib_cm_id
*ib_cm_insert_listen(struct ib_device
*device
,
1051 ib_cm_handler cm_handler
,
1054 struct cm_id_private
*cm_id_priv
;
1055 struct ib_cm_id
*cm_id
;
1056 unsigned long flags
;
1059 /* Create an ID in advance, since the creation may sleep */
1060 cm_id
= ib_create_cm_id(device
, cm_handler
, NULL
);
1064 spin_lock_irqsave(&cm
.lock
, flags
);
1066 if (service_id
== IB_CM_ASSIGN_SERVICE_ID
)
1069 /* Find an existing ID */
1070 cm_id_priv
= cm_find_listen(device
, service_id
);
1072 if (cm_id
->cm_handler
!= cm_handler
|| cm_id
->context
) {
1073 /* Sharing an ib_cm_id with different handlers is not
1075 spin_unlock_irqrestore(&cm
.lock
, flags
);
1076 return ERR_PTR(-EINVAL
);
1078 atomic_inc(&cm_id_priv
->refcount
);
1079 ++cm_id_priv
->listen_sharecount
;
1080 spin_unlock_irqrestore(&cm
.lock
, flags
);
1082 ib_destroy_cm_id(cm_id
);
1083 cm_id
= &cm_id_priv
->id
;
1088 /* Use newly created ID */
1089 err
= __ib_cm_listen(cm_id
, service_id
, 0);
1091 spin_unlock_irqrestore(&cm
.lock
, flags
);
1094 ib_destroy_cm_id(cm_id
);
1095 return ERR_PTR(err
);
1099 EXPORT_SYMBOL(ib_cm_insert_listen
);
1101 static __be64
cm_form_tid(struct cm_id_private
*cm_id_priv
,
1102 enum cm_msg_sequence msg_seq
)
1104 u64 hi_tid
, low_tid
;
1106 hi_tid
= ((u64
) cm_id_priv
->av
.port
->mad_agent
->hi_tid
) << 32;
1107 low_tid
= (u64
) ((__force u32
)cm_id_priv
->id
.local_id
|
1109 return cpu_to_be64(hi_tid
| low_tid
);
1112 static void cm_format_mad_hdr(struct ib_mad_hdr
*hdr
,
1113 __be16 attr_id
, __be64 tid
)
1115 hdr
->base_version
= IB_MGMT_BASE_VERSION
;
1116 hdr
->mgmt_class
= IB_MGMT_CLASS_CM
;
1117 hdr
->class_version
= IB_CM_CLASS_VERSION
;
1118 hdr
->method
= IB_MGMT_METHOD_SEND
;
1119 hdr
->attr_id
= attr_id
;
1123 static void cm_format_req(struct cm_req_msg
*req_msg
,
1124 struct cm_id_private
*cm_id_priv
,
1125 struct ib_cm_req_param
*param
)
1127 struct ib_sa_path_rec
*pri_path
= param
->primary_path
;
1128 struct ib_sa_path_rec
*alt_path
= param
->alternate_path
;
1130 cm_format_mad_hdr(&req_msg
->hdr
, CM_REQ_ATTR_ID
,
1131 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_REQ
));
1133 req_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1134 req_msg
->service_id
= param
->service_id
;
1135 req_msg
->local_ca_guid
= cm_id_priv
->id
.device
->node_guid
;
1136 cm_req_set_local_qpn(req_msg
, cpu_to_be32(param
->qp_num
));
1137 cm_req_set_init_depth(req_msg
, param
->initiator_depth
);
1138 cm_req_set_remote_resp_timeout(req_msg
,
1139 param
->remote_cm_response_timeout
);
1140 cm_req_set_qp_type(req_msg
, param
->qp_type
);
1141 cm_req_set_flow_ctrl(req_msg
, param
->flow_control
);
1142 cm_req_set_starting_psn(req_msg
, cpu_to_be32(param
->starting_psn
));
1143 cm_req_set_local_resp_timeout(req_msg
,
1144 param
->local_cm_response_timeout
);
1145 req_msg
->pkey
= param
->primary_path
->pkey
;
1146 cm_req_set_path_mtu(req_msg
, param
->primary_path
->mtu
);
1147 cm_req_set_max_cm_retries(req_msg
, param
->max_cm_retries
);
1149 if (param
->qp_type
!= IB_QPT_XRC_INI
) {
1150 cm_req_set_resp_res(req_msg
, param
->responder_resources
);
1151 cm_req_set_retry_count(req_msg
, param
->retry_count
);
1152 cm_req_set_rnr_retry_count(req_msg
, param
->rnr_retry_count
);
1153 cm_req_set_srq(req_msg
, param
->srq
);
1156 if (pri_path
->hop_limit
<= 1) {
1157 req_msg
->primary_local_lid
= pri_path
->slid
;
1158 req_msg
->primary_remote_lid
= pri_path
->dlid
;
1160 /* Work-around until there's a way to obtain remote LID info */
1161 req_msg
->primary_local_lid
= IB_LID_PERMISSIVE
;
1162 req_msg
->primary_remote_lid
= IB_LID_PERMISSIVE
;
1164 req_msg
->primary_local_gid
= pri_path
->sgid
;
1165 req_msg
->primary_remote_gid
= pri_path
->dgid
;
1166 cm_req_set_primary_flow_label(req_msg
, pri_path
->flow_label
);
1167 cm_req_set_primary_packet_rate(req_msg
, pri_path
->rate
);
1168 req_msg
->primary_traffic_class
= pri_path
->traffic_class
;
1169 req_msg
->primary_hop_limit
= pri_path
->hop_limit
;
1170 cm_req_set_primary_sl(req_msg
, pri_path
->sl
);
1171 cm_req_set_primary_subnet_local(req_msg
, (pri_path
->hop_limit
<= 1));
1172 cm_req_set_primary_local_ack_timeout(req_msg
,
1173 cm_ack_timeout(cm_id_priv
->av
.port
->cm_dev
->ack_delay
,
1174 pri_path
->packet_life_time
));
1177 if (alt_path
->hop_limit
<= 1) {
1178 req_msg
->alt_local_lid
= alt_path
->slid
;
1179 req_msg
->alt_remote_lid
= alt_path
->dlid
;
1181 req_msg
->alt_local_lid
= IB_LID_PERMISSIVE
;
1182 req_msg
->alt_remote_lid
= IB_LID_PERMISSIVE
;
1184 req_msg
->alt_local_gid
= alt_path
->sgid
;
1185 req_msg
->alt_remote_gid
= alt_path
->dgid
;
1186 cm_req_set_alt_flow_label(req_msg
,
1187 alt_path
->flow_label
);
1188 cm_req_set_alt_packet_rate(req_msg
, alt_path
->rate
);
1189 req_msg
->alt_traffic_class
= alt_path
->traffic_class
;
1190 req_msg
->alt_hop_limit
= alt_path
->hop_limit
;
1191 cm_req_set_alt_sl(req_msg
, alt_path
->sl
);
1192 cm_req_set_alt_subnet_local(req_msg
, (alt_path
->hop_limit
<= 1));
1193 cm_req_set_alt_local_ack_timeout(req_msg
,
1194 cm_ack_timeout(cm_id_priv
->av
.port
->cm_dev
->ack_delay
,
1195 alt_path
->packet_life_time
));
1198 if (param
->private_data
&& param
->private_data_len
)
1199 memcpy(req_msg
->private_data
, param
->private_data
,
1200 param
->private_data_len
);
1203 static int cm_validate_req_param(struct ib_cm_req_param
*param
)
1205 /* peer-to-peer not supported */
1206 if (param
->peer_to_peer
)
1209 if (!param
->primary_path
)
1212 if (param
->qp_type
!= IB_QPT_RC
&& param
->qp_type
!= IB_QPT_UC
&&
1213 param
->qp_type
!= IB_QPT_XRC_INI
)
1216 if (param
->private_data
&&
1217 param
->private_data_len
> IB_CM_REQ_PRIVATE_DATA_SIZE
)
1220 if (param
->alternate_path
&&
1221 (param
->alternate_path
->pkey
!= param
->primary_path
->pkey
||
1222 param
->alternate_path
->mtu
!= param
->primary_path
->mtu
))
1228 int ib_send_cm_req(struct ib_cm_id
*cm_id
,
1229 struct ib_cm_req_param
*param
)
1231 struct cm_id_private
*cm_id_priv
;
1232 struct cm_req_msg
*req_msg
;
1233 unsigned long flags
;
1236 ret
= cm_validate_req_param(param
);
1240 /* Verify that we're not in timewait. */
1241 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1242 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1243 if (cm_id
->state
!= IB_CM_IDLE
) {
1244 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1248 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1250 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
1252 if (IS_ERR(cm_id_priv
->timewait_info
)) {
1253 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
1257 ret
= cm_init_av_by_path(param
->primary_path
, &cm_id_priv
->av
,
1261 if (param
->alternate_path
) {
1262 ret
= cm_init_av_by_path(param
->alternate_path
,
1263 &cm_id_priv
->alt_av
, cm_id_priv
);
1267 cm_id
->service_id
= param
->service_id
;
1268 cm_id
->service_mask
= ~cpu_to_be64(0);
1269 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1270 param
->primary_path
->packet_life_time
) * 2 +
1272 param
->remote_cm_response_timeout
);
1273 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
1274 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1275 cm_id_priv
->responder_resources
= param
->responder_resources
;
1276 cm_id_priv
->retry_count
= param
->retry_count
;
1277 cm_id_priv
->path_mtu
= param
->primary_path
->mtu
;
1278 cm_id_priv
->pkey
= param
->primary_path
->pkey
;
1279 cm_id_priv
->qp_type
= param
->qp_type
;
1281 ret
= cm_alloc_msg(cm_id_priv
, &cm_id_priv
->msg
);
1285 req_msg
= (struct cm_req_msg
*) cm_id_priv
->msg
->mad
;
1286 cm_format_req(req_msg
, cm_id_priv
, param
);
1287 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1288 cm_id_priv
->msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1289 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long) IB_CM_REQ_SENT
;
1291 cm_id_priv
->local_qpn
= cm_req_get_local_qpn(req_msg
);
1292 cm_id_priv
->rq_psn
= cm_req_get_starting_psn(req_msg
);
1294 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1295 ret
= ib_post_send_mad(cm_id_priv
->msg
, NULL
);
1297 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1300 BUG_ON(cm_id
->state
!= IB_CM_IDLE
);
1301 cm_id
->state
= IB_CM_REQ_SENT
;
1302 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1305 error2
: cm_free_msg(cm_id_priv
->msg
);
1306 error1
: kfree(cm_id_priv
->timewait_info
);
1309 EXPORT_SYMBOL(ib_send_cm_req
);
1311 static int cm_issue_rej(struct cm_port
*port
,
1312 struct ib_mad_recv_wc
*mad_recv_wc
,
1313 enum ib_cm_rej_reason reason
,
1314 enum cm_msg_response msg_rejected
,
1315 void *ari
, u8 ari_length
)
1317 struct ib_mad_send_buf
*msg
= NULL
;
1318 struct cm_rej_msg
*rej_msg
, *rcv_msg
;
1321 ret
= cm_alloc_response_msg(port
, mad_recv_wc
, &msg
);
1325 /* We just need common CM header information. Cast to any message. */
1326 rcv_msg
= (struct cm_rej_msg
*) mad_recv_wc
->recv_buf
.mad
;
1327 rej_msg
= (struct cm_rej_msg
*) msg
->mad
;
1329 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, rcv_msg
->hdr
.tid
);
1330 rej_msg
->remote_comm_id
= rcv_msg
->local_comm_id
;
1331 rej_msg
->local_comm_id
= rcv_msg
->remote_comm_id
;
1332 cm_rej_set_msg_rejected(rej_msg
, msg_rejected
);
1333 rej_msg
->reason
= cpu_to_be16(reason
);
1335 if (ari
&& ari_length
) {
1336 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1337 memcpy(rej_msg
->ari
, ari
, ari_length
);
1340 ret
= ib_post_send_mad(msg
, NULL
);
1347 static inline int cm_is_active_peer(__be64 local_ca_guid
, __be64 remote_ca_guid
,
1348 __be32 local_qpn
, __be32 remote_qpn
)
1350 return (be64_to_cpu(local_ca_guid
) > be64_to_cpu(remote_ca_guid
) ||
1351 ((local_ca_guid
== remote_ca_guid
) &&
1352 (be32_to_cpu(local_qpn
) > be32_to_cpu(remote_qpn
))));
1355 static void cm_format_paths_from_req(struct cm_req_msg
*req_msg
,
1356 struct ib_sa_path_rec
*primary_path
,
1357 struct ib_sa_path_rec
*alt_path
)
1359 memset(primary_path
, 0, sizeof *primary_path
);
1360 primary_path
->dgid
= req_msg
->primary_local_gid
;
1361 primary_path
->sgid
= req_msg
->primary_remote_gid
;
1362 primary_path
->dlid
= req_msg
->primary_local_lid
;
1363 primary_path
->slid
= req_msg
->primary_remote_lid
;
1364 primary_path
->flow_label
= cm_req_get_primary_flow_label(req_msg
);
1365 primary_path
->hop_limit
= req_msg
->primary_hop_limit
;
1366 primary_path
->traffic_class
= req_msg
->primary_traffic_class
;
1367 primary_path
->reversible
= 1;
1368 primary_path
->pkey
= req_msg
->pkey
;
1369 primary_path
->sl
= cm_req_get_primary_sl(req_msg
);
1370 primary_path
->mtu_selector
= IB_SA_EQ
;
1371 primary_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1372 primary_path
->rate_selector
= IB_SA_EQ
;
1373 primary_path
->rate
= cm_req_get_primary_packet_rate(req_msg
);
1374 primary_path
->packet_life_time_selector
= IB_SA_EQ
;
1375 primary_path
->packet_life_time
=
1376 cm_req_get_primary_local_ack_timeout(req_msg
);
1377 primary_path
->packet_life_time
-= (primary_path
->packet_life_time
> 0);
1378 primary_path
->service_id
= req_msg
->service_id
;
1380 if (req_msg
->alt_local_lid
) {
1381 memset(alt_path
, 0, sizeof *alt_path
);
1382 alt_path
->dgid
= req_msg
->alt_local_gid
;
1383 alt_path
->sgid
= req_msg
->alt_remote_gid
;
1384 alt_path
->dlid
= req_msg
->alt_local_lid
;
1385 alt_path
->slid
= req_msg
->alt_remote_lid
;
1386 alt_path
->flow_label
= cm_req_get_alt_flow_label(req_msg
);
1387 alt_path
->hop_limit
= req_msg
->alt_hop_limit
;
1388 alt_path
->traffic_class
= req_msg
->alt_traffic_class
;
1389 alt_path
->reversible
= 1;
1390 alt_path
->pkey
= req_msg
->pkey
;
1391 alt_path
->sl
= cm_req_get_alt_sl(req_msg
);
1392 alt_path
->mtu_selector
= IB_SA_EQ
;
1393 alt_path
->mtu
= cm_req_get_path_mtu(req_msg
);
1394 alt_path
->rate_selector
= IB_SA_EQ
;
1395 alt_path
->rate
= cm_req_get_alt_packet_rate(req_msg
);
1396 alt_path
->packet_life_time_selector
= IB_SA_EQ
;
1397 alt_path
->packet_life_time
=
1398 cm_req_get_alt_local_ack_timeout(req_msg
);
1399 alt_path
->packet_life_time
-= (alt_path
->packet_life_time
> 0);
1400 alt_path
->service_id
= req_msg
->service_id
;
1404 static u16
cm_get_bth_pkey(struct cm_work
*work
)
1406 struct ib_device
*ib_dev
= work
->port
->cm_dev
->ib_device
;
1407 u8 port_num
= work
->port
->port_num
;
1408 u16 pkey_index
= work
->mad_recv_wc
->wc
->pkey_index
;
1412 ret
= ib_get_cached_pkey(ib_dev
, port_num
, pkey_index
, &pkey
);
1414 dev_warn_ratelimited(&ib_dev
->dev
, "ib_cm: Couldn't retrieve pkey for incoming request (port %d, pkey index %d). %d\n",
1415 port_num
, pkey_index
, ret
);
1422 static void cm_format_req_event(struct cm_work
*work
,
1423 struct cm_id_private
*cm_id_priv
,
1424 struct ib_cm_id
*listen_id
)
1426 struct cm_req_msg
*req_msg
;
1427 struct ib_cm_req_event_param
*param
;
1429 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1430 param
= &work
->cm_event
.param
.req_rcvd
;
1431 param
->listen_id
= listen_id
;
1432 param
->bth_pkey
= cm_get_bth_pkey(work
);
1433 param
->port
= cm_id_priv
->av
.port
->port_num
;
1434 param
->primary_path
= &work
->path
[0];
1435 if (req_msg
->alt_local_lid
)
1436 param
->alternate_path
= &work
->path
[1];
1438 param
->alternate_path
= NULL
;
1439 param
->remote_ca_guid
= req_msg
->local_ca_guid
;
1440 param
->remote_qkey
= be32_to_cpu(req_msg
->local_qkey
);
1441 param
->remote_qpn
= be32_to_cpu(cm_req_get_local_qpn(req_msg
));
1442 param
->qp_type
= cm_req_get_qp_type(req_msg
);
1443 param
->starting_psn
= be32_to_cpu(cm_req_get_starting_psn(req_msg
));
1444 param
->responder_resources
= cm_req_get_init_depth(req_msg
);
1445 param
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1446 param
->local_cm_response_timeout
=
1447 cm_req_get_remote_resp_timeout(req_msg
);
1448 param
->flow_control
= cm_req_get_flow_ctrl(req_msg
);
1449 param
->remote_cm_response_timeout
=
1450 cm_req_get_local_resp_timeout(req_msg
);
1451 param
->retry_count
= cm_req_get_retry_count(req_msg
);
1452 param
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1453 param
->srq
= cm_req_get_srq(req_msg
);
1454 work
->cm_event
.private_data
= &req_msg
->private_data
;
1457 static void cm_process_work(struct cm_id_private
*cm_id_priv
,
1458 struct cm_work
*work
)
1462 /* We will typically only have the current event to report. */
1463 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &work
->cm_event
);
1466 while (!ret
&& !atomic_add_negative(-1, &cm_id_priv
->work_count
)) {
1467 spin_lock_irq(&cm_id_priv
->lock
);
1468 work
= cm_dequeue_work(cm_id_priv
);
1469 spin_unlock_irq(&cm_id_priv
->lock
);
1471 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
,
1475 cm_deref_id(cm_id_priv
);
1477 cm_destroy_id(&cm_id_priv
->id
, ret
);
1480 static void cm_format_mra(struct cm_mra_msg
*mra_msg
,
1481 struct cm_id_private
*cm_id_priv
,
1482 enum cm_msg_response msg_mraed
, u8 service_timeout
,
1483 const void *private_data
, u8 private_data_len
)
1485 cm_format_mad_hdr(&mra_msg
->hdr
, CM_MRA_ATTR_ID
, cm_id_priv
->tid
);
1486 cm_mra_set_msg_mraed(mra_msg
, msg_mraed
);
1487 mra_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1488 mra_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1489 cm_mra_set_service_timeout(mra_msg
, service_timeout
);
1491 if (private_data
&& private_data_len
)
1492 memcpy(mra_msg
->private_data
, private_data
, private_data_len
);
1495 static void cm_format_rej(struct cm_rej_msg
*rej_msg
,
1496 struct cm_id_private
*cm_id_priv
,
1497 enum ib_cm_rej_reason reason
,
1500 const void *private_data
,
1501 u8 private_data_len
)
1503 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, cm_id_priv
->tid
);
1504 rej_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1506 switch(cm_id_priv
->id
.state
) {
1507 case IB_CM_REQ_RCVD
:
1508 rej_msg
->local_comm_id
= 0;
1509 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1511 case IB_CM_MRA_REQ_SENT
:
1512 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1513 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REQ
);
1515 case IB_CM_REP_RCVD
:
1516 case IB_CM_MRA_REP_SENT
:
1517 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1518 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_REP
);
1521 rej_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1522 cm_rej_set_msg_rejected(rej_msg
, CM_MSG_RESPONSE_OTHER
);
1526 rej_msg
->reason
= cpu_to_be16(reason
);
1527 if (ari
&& ari_length
) {
1528 cm_rej_set_reject_info_len(rej_msg
, ari_length
);
1529 memcpy(rej_msg
->ari
, ari
, ari_length
);
1532 if (private_data
&& private_data_len
)
1533 memcpy(rej_msg
->private_data
, private_data
, private_data_len
);
1536 static void cm_dup_req_handler(struct cm_work
*work
,
1537 struct cm_id_private
*cm_id_priv
)
1539 struct ib_mad_send_buf
*msg
= NULL
;
1542 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
1543 counter
[CM_REQ_COUNTER
]);
1545 /* Quick state check to discard duplicate REQs. */
1546 if (cm_id_priv
->id
.state
== IB_CM_REQ_RCVD
)
1549 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1553 spin_lock_irq(&cm_id_priv
->lock
);
1554 switch (cm_id_priv
->id
.state
) {
1555 case IB_CM_MRA_REQ_SENT
:
1556 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1557 CM_MSG_RESPONSE_REQ
, cm_id_priv
->service_timeout
,
1558 cm_id_priv
->private_data
,
1559 cm_id_priv
->private_data_len
);
1561 case IB_CM_TIMEWAIT
:
1562 cm_format_rej((struct cm_rej_msg
*) msg
->mad
, cm_id_priv
,
1563 IB_CM_REJ_STALE_CONN
, NULL
, 0, NULL
, 0);
1568 spin_unlock_irq(&cm_id_priv
->lock
);
1570 ret
= ib_post_send_mad(msg
, NULL
);
1575 unlock
: spin_unlock_irq(&cm_id_priv
->lock
);
1576 free
: cm_free_msg(msg
);
1579 static struct cm_id_private
* cm_match_req(struct cm_work
*work
,
1580 struct cm_id_private
*cm_id_priv
)
1582 struct cm_id_private
*listen_cm_id_priv
, *cur_cm_id_priv
;
1583 struct cm_timewait_info
*timewait_info
;
1584 struct cm_req_msg
*req_msg
;
1586 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1588 /* Check for possible duplicate REQ. */
1589 spin_lock_irq(&cm
.lock
);
1590 timewait_info
= cm_insert_remote_id(cm_id_priv
->timewait_info
);
1591 if (timewait_info
) {
1592 cur_cm_id_priv
= cm_get_id(timewait_info
->work
.local_id
,
1593 timewait_info
->work
.remote_id
);
1594 spin_unlock_irq(&cm
.lock
);
1595 if (cur_cm_id_priv
) {
1596 cm_dup_req_handler(work
, cur_cm_id_priv
);
1597 cm_deref_id(cur_cm_id_priv
);
1602 /* Check for stale connections. */
1603 timewait_info
= cm_insert_remote_qpn(cm_id_priv
->timewait_info
);
1604 if (timewait_info
) {
1605 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1606 spin_unlock_irq(&cm
.lock
);
1607 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1608 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REQ
,
1613 /* Find matching listen request. */
1614 listen_cm_id_priv
= cm_find_listen(cm_id_priv
->id
.device
,
1615 req_msg
->service_id
);
1616 if (!listen_cm_id_priv
) {
1617 cm_cleanup_timewait(cm_id_priv
->timewait_info
);
1618 spin_unlock_irq(&cm
.lock
);
1619 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
1620 IB_CM_REJ_INVALID_SERVICE_ID
, CM_MSG_RESPONSE_REQ
,
1624 atomic_inc(&listen_cm_id_priv
->refcount
);
1625 atomic_inc(&cm_id_priv
->refcount
);
1626 cm_id_priv
->id
.state
= IB_CM_REQ_RCVD
;
1627 atomic_inc(&cm_id_priv
->work_count
);
1628 spin_unlock_irq(&cm
.lock
);
1630 return listen_cm_id_priv
;
1634 * Work-around for inter-subnet connections. If the LIDs are permissive,
1635 * we need to override the LID/SL data in the REQ with the LID information
1636 * in the work completion.
1638 static void cm_process_routed_req(struct cm_req_msg
*req_msg
, struct ib_wc
*wc
)
1640 if (!cm_req_get_primary_subnet_local(req_msg
)) {
1641 if (req_msg
->primary_local_lid
== IB_LID_PERMISSIVE
) {
1642 req_msg
->primary_local_lid
= cpu_to_be16(wc
->slid
);
1643 cm_req_set_primary_sl(req_msg
, wc
->sl
);
1646 if (req_msg
->primary_remote_lid
== IB_LID_PERMISSIVE
)
1647 req_msg
->primary_remote_lid
= cpu_to_be16(wc
->dlid_path_bits
);
1650 if (!cm_req_get_alt_subnet_local(req_msg
)) {
1651 if (req_msg
->alt_local_lid
== IB_LID_PERMISSIVE
) {
1652 req_msg
->alt_local_lid
= cpu_to_be16(wc
->slid
);
1653 cm_req_set_alt_sl(req_msg
, wc
->sl
);
1656 if (req_msg
->alt_remote_lid
== IB_LID_PERMISSIVE
)
1657 req_msg
->alt_remote_lid
= cpu_to_be16(wc
->dlid_path_bits
);
1661 static int cm_req_handler(struct cm_work
*work
)
1663 struct ib_cm_id
*cm_id
;
1664 struct cm_id_private
*cm_id_priv
, *listen_cm_id_priv
;
1665 struct cm_req_msg
*req_msg
;
1667 struct ib_gid_attr gid_attr
;
1670 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1672 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->ib_device
, NULL
, NULL
);
1674 return PTR_ERR(cm_id
);
1676 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1677 cm_id_priv
->id
.remote_id
= req_msg
->local_comm_id
;
1678 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
1679 work
->mad_recv_wc
->recv_buf
.grh
,
1681 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
1683 if (IS_ERR(cm_id_priv
->timewait_info
)) {
1684 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
1687 cm_id_priv
->timewait_info
->work
.remote_id
= req_msg
->local_comm_id
;
1688 cm_id_priv
->timewait_info
->remote_ca_guid
= req_msg
->local_ca_guid
;
1689 cm_id_priv
->timewait_info
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1691 listen_cm_id_priv
= cm_match_req(work
, cm_id_priv
);
1692 if (!listen_cm_id_priv
) {
1694 kfree(cm_id_priv
->timewait_info
);
1698 cm_id_priv
->id
.cm_handler
= listen_cm_id_priv
->id
.cm_handler
;
1699 cm_id_priv
->id
.context
= listen_cm_id_priv
->id
.context
;
1700 cm_id_priv
->id
.service_id
= req_msg
->service_id
;
1701 cm_id_priv
->id
.service_mask
= ~cpu_to_be64(0);
1703 cm_process_routed_req(req_msg
, work
->mad_recv_wc
->wc
);
1704 cm_format_paths_from_req(req_msg
, &work
->path
[0], &work
->path
[1]);
1706 memcpy(work
->path
[0].dmac
, cm_id_priv
->av
.ah_attr
.dmac
, ETH_ALEN
);
1707 work
->path
[0].hop_limit
= cm_id_priv
->av
.ah_attr
.grh
.hop_limit
;
1708 ret
= ib_get_cached_gid(work
->port
->cm_dev
->ib_device
,
1709 work
->port
->port_num
,
1710 cm_id_priv
->av
.ah_attr
.grh
.sgid_index
,
1713 if (gid_attr
.ndev
) {
1714 work
->path
[0].ifindex
= gid_attr
.ndev
->ifindex
;
1715 work
->path
[0].net
= dev_net(gid_attr
.ndev
);
1716 dev_put(gid_attr
.ndev
);
1718 work
->path
[0].gid_type
= gid_attr
.gid_type
;
1719 ret
= cm_init_av_by_path(&work
->path
[0], &cm_id_priv
->av
,
1723 int err
= ib_get_cached_gid(work
->port
->cm_dev
->ib_device
,
1724 work
->port
->port_num
, 0,
1725 &work
->path
[0].sgid
,
1727 if (!err
&& gid_attr
.ndev
) {
1728 work
->path
[0].ifindex
= gid_attr
.ndev
->ifindex
;
1729 work
->path
[0].net
= dev_net(gid_attr
.ndev
);
1730 dev_put(gid_attr
.ndev
);
1732 work
->path
[0].gid_type
= gid_attr
.gid_type
;
1733 ib_send_cm_rej(cm_id
, IB_CM_REJ_INVALID_GID
,
1734 &work
->path
[0].sgid
, sizeof work
->path
[0].sgid
,
1738 if (req_msg
->alt_local_lid
) {
1739 ret
= cm_init_av_by_path(&work
->path
[1], &cm_id_priv
->alt_av
,
1742 ib_send_cm_rej(cm_id
, IB_CM_REJ_INVALID_ALT_GID
,
1743 &work
->path
[0].sgid
,
1744 sizeof work
->path
[0].sgid
, NULL
, 0);
1748 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1749 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1750 cm_req_get_local_resp_timeout(req_msg
));
1751 cm_id_priv
->max_cm_retries
= cm_req_get_max_cm_retries(req_msg
);
1752 cm_id_priv
->remote_qpn
= cm_req_get_local_qpn(req_msg
);
1753 cm_id_priv
->initiator_depth
= cm_req_get_resp_res(req_msg
);
1754 cm_id_priv
->responder_resources
= cm_req_get_init_depth(req_msg
);
1755 cm_id_priv
->path_mtu
= cm_req_get_path_mtu(req_msg
);
1756 cm_id_priv
->pkey
= req_msg
->pkey
;
1757 cm_id_priv
->sq_psn
= cm_req_get_starting_psn(req_msg
);
1758 cm_id_priv
->retry_count
= cm_req_get_retry_count(req_msg
);
1759 cm_id_priv
->rnr_retry_count
= cm_req_get_rnr_retry_count(req_msg
);
1760 cm_id_priv
->qp_type
= cm_req_get_qp_type(req_msg
);
1762 cm_format_req_event(work
, cm_id_priv
, &listen_cm_id_priv
->id
);
1763 cm_process_work(cm_id_priv
, work
);
1764 cm_deref_id(listen_cm_id_priv
);
1768 atomic_dec(&cm_id_priv
->refcount
);
1769 cm_deref_id(listen_cm_id_priv
);
1771 ib_destroy_cm_id(cm_id
);
1775 static void cm_format_rep(struct cm_rep_msg
*rep_msg
,
1776 struct cm_id_private
*cm_id_priv
,
1777 struct ib_cm_rep_param
*param
)
1779 cm_format_mad_hdr(&rep_msg
->hdr
, CM_REP_ATTR_ID
, cm_id_priv
->tid
);
1780 rep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1781 rep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1782 cm_rep_set_starting_psn(rep_msg
, cpu_to_be32(param
->starting_psn
));
1783 rep_msg
->resp_resources
= param
->responder_resources
;
1784 cm_rep_set_target_ack_delay(rep_msg
,
1785 cm_id_priv
->av
.port
->cm_dev
->ack_delay
);
1786 cm_rep_set_failover(rep_msg
, param
->failover_accepted
);
1787 cm_rep_set_rnr_retry_count(rep_msg
, param
->rnr_retry_count
);
1788 rep_msg
->local_ca_guid
= cm_id_priv
->id
.device
->node_guid
;
1790 if (cm_id_priv
->qp_type
!= IB_QPT_XRC_TGT
) {
1791 rep_msg
->initiator_depth
= param
->initiator_depth
;
1792 cm_rep_set_flow_ctrl(rep_msg
, param
->flow_control
);
1793 cm_rep_set_srq(rep_msg
, param
->srq
);
1794 cm_rep_set_local_qpn(rep_msg
, cpu_to_be32(param
->qp_num
));
1796 cm_rep_set_srq(rep_msg
, 1);
1797 cm_rep_set_local_eecn(rep_msg
, cpu_to_be32(param
->qp_num
));
1800 if (param
->private_data
&& param
->private_data_len
)
1801 memcpy(rep_msg
->private_data
, param
->private_data
,
1802 param
->private_data_len
);
1805 int ib_send_cm_rep(struct ib_cm_id
*cm_id
,
1806 struct ib_cm_rep_param
*param
)
1808 struct cm_id_private
*cm_id_priv
;
1809 struct ib_mad_send_buf
*msg
;
1810 struct cm_rep_msg
*rep_msg
;
1811 unsigned long flags
;
1814 if (param
->private_data
&&
1815 param
->private_data_len
> IB_CM_REP_PRIVATE_DATA_SIZE
)
1818 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1819 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1820 if (cm_id
->state
!= IB_CM_REQ_RCVD
&&
1821 cm_id
->state
!= IB_CM_MRA_REQ_SENT
) {
1826 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1830 rep_msg
= (struct cm_rep_msg
*) msg
->mad
;
1831 cm_format_rep(rep_msg
, cm_id_priv
, param
);
1832 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1833 msg
->context
[1] = (void *) (unsigned long) IB_CM_REP_SENT
;
1835 ret
= ib_post_send_mad(msg
, NULL
);
1837 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1842 cm_id
->state
= IB_CM_REP_SENT
;
1843 cm_id_priv
->msg
= msg
;
1844 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1845 cm_id_priv
->responder_resources
= param
->responder_resources
;
1846 cm_id_priv
->rq_psn
= cm_rep_get_starting_psn(rep_msg
);
1847 cm_id_priv
->local_qpn
= cpu_to_be32(param
->qp_num
& 0xFFFFFF);
1849 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1852 EXPORT_SYMBOL(ib_send_cm_rep
);
1854 static void cm_format_rtu(struct cm_rtu_msg
*rtu_msg
,
1855 struct cm_id_private
*cm_id_priv
,
1856 const void *private_data
,
1857 u8 private_data_len
)
1859 cm_format_mad_hdr(&rtu_msg
->hdr
, CM_RTU_ATTR_ID
, cm_id_priv
->tid
);
1860 rtu_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
1861 rtu_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
1863 if (private_data
&& private_data_len
)
1864 memcpy(rtu_msg
->private_data
, private_data
, private_data_len
);
1867 int ib_send_cm_rtu(struct ib_cm_id
*cm_id
,
1868 const void *private_data
,
1869 u8 private_data_len
)
1871 struct cm_id_private
*cm_id_priv
;
1872 struct ib_mad_send_buf
*msg
;
1873 unsigned long flags
;
1877 if (private_data
&& private_data_len
> IB_CM_RTU_PRIVATE_DATA_SIZE
)
1880 data
= cm_copy_private_data(private_data
, private_data_len
);
1882 return PTR_ERR(data
);
1884 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1885 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1886 if (cm_id
->state
!= IB_CM_REP_RCVD
&&
1887 cm_id
->state
!= IB_CM_MRA_REP_SENT
) {
1892 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
1896 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1897 private_data
, private_data_len
);
1899 ret
= ib_post_send_mad(msg
, NULL
);
1901 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1907 cm_id
->state
= IB_CM_ESTABLISHED
;
1908 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
1909 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1912 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1916 EXPORT_SYMBOL(ib_send_cm_rtu
);
1918 static void cm_format_rep_event(struct cm_work
*work
, enum ib_qp_type qp_type
)
1920 struct cm_rep_msg
*rep_msg
;
1921 struct ib_cm_rep_event_param
*param
;
1923 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1924 param
= &work
->cm_event
.param
.rep_rcvd
;
1925 param
->remote_ca_guid
= rep_msg
->local_ca_guid
;
1926 param
->remote_qkey
= be32_to_cpu(rep_msg
->local_qkey
);
1927 param
->remote_qpn
= be32_to_cpu(cm_rep_get_qpn(rep_msg
, qp_type
));
1928 param
->starting_psn
= be32_to_cpu(cm_rep_get_starting_psn(rep_msg
));
1929 param
->responder_resources
= rep_msg
->initiator_depth
;
1930 param
->initiator_depth
= rep_msg
->resp_resources
;
1931 param
->target_ack_delay
= cm_rep_get_target_ack_delay(rep_msg
);
1932 param
->failover_accepted
= cm_rep_get_failover(rep_msg
);
1933 param
->flow_control
= cm_rep_get_flow_ctrl(rep_msg
);
1934 param
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
1935 param
->srq
= cm_rep_get_srq(rep_msg
);
1936 work
->cm_event
.private_data
= &rep_msg
->private_data
;
1939 static void cm_dup_rep_handler(struct cm_work
*work
)
1941 struct cm_id_private
*cm_id_priv
;
1942 struct cm_rep_msg
*rep_msg
;
1943 struct ib_mad_send_buf
*msg
= NULL
;
1946 rep_msg
= (struct cm_rep_msg
*) work
->mad_recv_wc
->recv_buf
.mad
;
1947 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
,
1948 rep_msg
->local_comm_id
);
1952 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
1953 counter
[CM_REP_COUNTER
]);
1954 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1958 spin_lock_irq(&cm_id_priv
->lock
);
1959 if (cm_id_priv
->id
.state
== IB_CM_ESTABLISHED
)
1960 cm_format_rtu((struct cm_rtu_msg
*) msg
->mad
, cm_id_priv
,
1961 cm_id_priv
->private_data
,
1962 cm_id_priv
->private_data_len
);
1963 else if (cm_id_priv
->id
.state
== IB_CM_MRA_REP_SENT
)
1964 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1965 CM_MSG_RESPONSE_REP
, cm_id_priv
->service_timeout
,
1966 cm_id_priv
->private_data
,
1967 cm_id_priv
->private_data_len
);
1970 spin_unlock_irq(&cm_id_priv
->lock
);
1972 ret
= ib_post_send_mad(msg
, NULL
);
1977 unlock
: spin_unlock_irq(&cm_id_priv
->lock
);
1978 free
: cm_free_msg(msg
);
1979 deref
: cm_deref_id(cm_id_priv
);
1982 static int cm_rep_handler(struct cm_work
*work
)
1984 struct cm_id_private
*cm_id_priv
;
1985 struct cm_rep_msg
*rep_msg
;
1988 rep_msg
= (struct cm_rep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1989 cm_id_priv
= cm_acquire_id(rep_msg
->remote_comm_id
, 0);
1991 cm_dup_rep_handler(work
);
1995 cm_format_rep_event(work
, cm_id_priv
->qp_type
);
1997 spin_lock_irq(&cm_id_priv
->lock
);
1998 switch (cm_id_priv
->id
.state
) {
1999 case IB_CM_REQ_SENT
:
2000 case IB_CM_MRA_REQ_RCVD
:
2003 spin_unlock_irq(&cm_id_priv
->lock
);
2008 cm_id_priv
->timewait_info
->work
.remote_id
= rep_msg
->local_comm_id
;
2009 cm_id_priv
->timewait_info
->remote_ca_guid
= rep_msg
->local_ca_guid
;
2010 cm_id_priv
->timewait_info
->remote_qpn
= cm_rep_get_qpn(rep_msg
, cm_id_priv
->qp_type
);
2012 spin_lock(&cm
.lock
);
2013 /* Check for duplicate REP. */
2014 if (cm_insert_remote_id(cm_id_priv
->timewait_info
)) {
2015 spin_unlock(&cm
.lock
);
2016 spin_unlock_irq(&cm_id_priv
->lock
);
2020 /* Check for a stale connection. */
2021 if (cm_insert_remote_qpn(cm_id_priv
->timewait_info
)) {
2022 rb_erase(&cm_id_priv
->timewait_info
->remote_id_node
,
2023 &cm
.remote_id_table
);
2024 cm_id_priv
->timewait_info
->inserted_remote_id
= 0;
2025 spin_unlock(&cm
.lock
);
2026 spin_unlock_irq(&cm_id_priv
->lock
);
2027 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
2028 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REP
,
2033 spin_unlock(&cm
.lock
);
2035 cm_id_priv
->id
.state
= IB_CM_REP_RCVD
;
2036 cm_id_priv
->id
.remote_id
= rep_msg
->local_comm_id
;
2037 cm_id_priv
->remote_qpn
= cm_rep_get_qpn(rep_msg
, cm_id_priv
->qp_type
);
2038 cm_id_priv
->initiator_depth
= rep_msg
->resp_resources
;
2039 cm_id_priv
->responder_resources
= rep_msg
->initiator_depth
;
2040 cm_id_priv
->sq_psn
= cm_rep_get_starting_psn(rep_msg
);
2041 cm_id_priv
->rnr_retry_count
= cm_rep_get_rnr_retry_count(rep_msg
);
2042 cm_id_priv
->target_ack_delay
= cm_rep_get_target_ack_delay(rep_msg
);
2043 cm_id_priv
->av
.timeout
=
2044 cm_ack_timeout(cm_id_priv
->target_ack_delay
,
2045 cm_id_priv
->av
.timeout
- 1);
2046 cm_id_priv
->alt_av
.timeout
=
2047 cm_ack_timeout(cm_id_priv
->target_ack_delay
,
2048 cm_id_priv
->alt_av
.timeout
- 1);
2050 /* todo: handle peer_to_peer */
2052 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2053 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2055 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2056 spin_unlock_irq(&cm_id_priv
->lock
);
2059 cm_process_work(cm_id_priv
, work
);
2061 cm_deref_id(cm_id_priv
);
2065 cm_deref_id(cm_id_priv
);
2069 static int cm_establish_handler(struct cm_work
*work
)
2071 struct cm_id_private
*cm_id_priv
;
2074 /* See comment in cm_establish about lookup. */
2075 cm_id_priv
= cm_acquire_id(work
->local_id
, work
->remote_id
);
2079 spin_lock_irq(&cm_id_priv
->lock
);
2080 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
) {
2081 spin_unlock_irq(&cm_id_priv
->lock
);
2085 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2086 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2088 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2089 spin_unlock_irq(&cm_id_priv
->lock
);
2092 cm_process_work(cm_id_priv
, work
);
2094 cm_deref_id(cm_id_priv
);
2097 cm_deref_id(cm_id_priv
);
2101 static int cm_rtu_handler(struct cm_work
*work
)
2103 struct cm_id_private
*cm_id_priv
;
2104 struct cm_rtu_msg
*rtu_msg
;
2107 rtu_msg
= (struct cm_rtu_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2108 cm_id_priv
= cm_acquire_id(rtu_msg
->remote_comm_id
,
2109 rtu_msg
->local_comm_id
);
2113 work
->cm_event
.private_data
= &rtu_msg
->private_data
;
2115 spin_lock_irq(&cm_id_priv
->lock
);
2116 if (cm_id_priv
->id
.state
!= IB_CM_REP_SENT
&&
2117 cm_id_priv
->id
.state
!= IB_CM_MRA_REP_RCVD
) {
2118 spin_unlock_irq(&cm_id_priv
->lock
);
2119 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2120 counter
[CM_RTU_COUNTER
]);
2123 cm_id_priv
->id
.state
= IB_CM_ESTABLISHED
;
2125 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2126 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2128 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2129 spin_unlock_irq(&cm_id_priv
->lock
);
2132 cm_process_work(cm_id_priv
, work
);
2134 cm_deref_id(cm_id_priv
);
2137 cm_deref_id(cm_id_priv
);
2141 static void cm_format_dreq(struct cm_dreq_msg
*dreq_msg
,
2142 struct cm_id_private
*cm_id_priv
,
2143 const void *private_data
,
2144 u8 private_data_len
)
2146 cm_format_mad_hdr(&dreq_msg
->hdr
, CM_DREQ_ATTR_ID
,
2147 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_DREQ
));
2148 dreq_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2149 dreq_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2150 cm_dreq_set_remote_qpn(dreq_msg
, cm_id_priv
->remote_qpn
);
2152 if (private_data
&& private_data_len
)
2153 memcpy(dreq_msg
->private_data
, private_data
, private_data_len
);
2156 int ib_send_cm_dreq(struct ib_cm_id
*cm_id
,
2157 const void *private_data
,
2158 u8 private_data_len
)
2160 struct cm_id_private
*cm_id_priv
;
2161 struct ib_mad_send_buf
*msg
;
2162 unsigned long flags
;
2165 if (private_data
&& private_data_len
> IB_CM_DREQ_PRIVATE_DATA_SIZE
)
2168 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2169 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2170 if (cm_id
->state
!= IB_CM_ESTABLISHED
) {
2175 if (cm_id
->lap_state
== IB_CM_LAP_SENT
||
2176 cm_id
->lap_state
== IB_CM_MRA_LAP_RCVD
)
2177 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2179 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2181 cm_enter_timewait(cm_id_priv
);
2185 cm_format_dreq((struct cm_dreq_msg
*) msg
->mad
, cm_id_priv
,
2186 private_data
, private_data_len
);
2187 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2188 msg
->context
[1] = (void *) (unsigned long) IB_CM_DREQ_SENT
;
2190 ret
= ib_post_send_mad(msg
, NULL
);
2192 cm_enter_timewait(cm_id_priv
);
2193 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2198 cm_id
->state
= IB_CM_DREQ_SENT
;
2199 cm_id_priv
->msg
= msg
;
2200 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2203 EXPORT_SYMBOL(ib_send_cm_dreq
);
2205 static void cm_format_drep(struct cm_drep_msg
*drep_msg
,
2206 struct cm_id_private
*cm_id_priv
,
2207 const void *private_data
,
2208 u8 private_data_len
)
2210 cm_format_mad_hdr(&drep_msg
->hdr
, CM_DREP_ATTR_ID
, cm_id_priv
->tid
);
2211 drep_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2212 drep_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2214 if (private_data
&& private_data_len
)
2215 memcpy(drep_msg
->private_data
, private_data
, private_data_len
);
2218 int ib_send_cm_drep(struct ib_cm_id
*cm_id
,
2219 const void *private_data
,
2220 u8 private_data_len
)
2222 struct cm_id_private
*cm_id_priv
;
2223 struct ib_mad_send_buf
*msg
;
2224 unsigned long flags
;
2228 if (private_data
&& private_data_len
> IB_CM_DREP_PRIVATE_DATA_SIZE
)
2231 data
= cm_copy_private_data(private_data
, private_data_len
);
2233 return PTR_ERR(data
);
2235 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2236 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2237 if (cm_id
->state
!= IB_CM_DREQ_RCVD
) {
2238 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2243 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
2244 cm_enter_timewait(cm_id_priv
);
2246 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2250 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
2251 private_data
, private_data_len
);
2253 ret
= ib_post_send_mad(msg
, NULL
);
2255 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2260 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2263 EXPORT_SYMBOL(ib_send_cm_drep
);
2265 static int cm_issue_drep(struct cm_port
*port
,
2266 struct ib_mad_recv_wc
*mad_recv_wc
)
2268 struct ib_mad_send_buf
*msg
= NULL
;
2269 struct cm_dreq_msg
*dreq_msg
;
2270 struct cm_drep_msg
*drep_msg
;
2273 ret
= cm_alloc_response_msg(port
, mad_recv_wc
, &msg
);
2277 dreq_msg
= (struct cm_dreq_msg
*) mad_recv_wc
->recv_buf
.mad
;
2278 drep_msg
= (struct cm_drep_msg
*) msg
->mad
;
2280 cm_format_mad_hdr(&drep_msg
->hdr
, CM_DREP_ATTR_ID
, dreq_msg
->hdr
.tid
);
2281 drep_msg
->remote_comm_id
= dreq_msg
->local_comm_id
;
2282 drep_msg
->local_comm_id
= dreq_msg
->remote_comm_id
;
2284 ret
= ib_post_send_mad(msg
, NULL
);
2291 static int cm_dreq_handler(struct cm_work
*work
)
2293 struct cm_id_private
*cm_id_priv
;
2294 struct cm_dreq_msg
*dreq_msg
;
2295 struct ib_mad_send_buf
*msg
= NULL
;
2298 dreq_msg
= (struct cm_dreq_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2299 cm_id_priv
= cm_acquire_id(dreq_msg
->remote_comm_id
,
2300 dreq_msg
->local_comm_id
);
2302 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2303 counter
[CM_DREQ_COUNTER
]);
2304 cm_issue_drep(work
->port
, work
->mad_recv_wc
);
2308 work
->cm_event
.private_data
= &dreq_msg
->private_data
;
2310 spin_lock_irq(&cm_id_priv
->lock
);
2311 if (cm_id_priv
->local_qpn
!= cm_dreq_get_remote_qpn(dreq_msg
))
2314 switch (cm_id_priv
->id
.state
) {
2315 case IB_CM_REP_SENT
:
2316 case IB_CM_DREQ_SENT
:
2317 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2319 case IB_CM_ESTABLISHED
:
2320 if (cm_id_priv
->id
.lap_state
== IB_CM_LAP_SENT
||
2321 cm_id_priv
->id
.lap_state
== IB_CM_MRA_LAP_RCVD
)
2322 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2324 case IB_CM_MRA_REP_RCVD
:
2326 case IB_CM_TIMEWAIT
:
2327 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2328 counter
[CM_DREQ_COUNTER
]);
2329 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
2332 cm_format_drep((struct cm_drep_msg
*) msg
->mad
, cm_id_priv
,
2333 cm_id_priv
->private_data
,
2334 cm_id_priv
->private_data_len
);
2335 spin_unlock_irq(&cm_id_priv
->lock
);
2337 if (ib_post_send_mad(msg
, NULL
))
2340 case IB_CM_DREQ_RCVD
:
2341 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2342 counter
[CM_DREQ_COUNTER
]);
2347 cm_id_priv
->id
.state
= IB_CM_DREQ_RCVD
;
2348 cm_id_priv
->tid
= dreq_msg
->hdr
.tid
;
2349 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2351 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2352 spin_unlock_irq(&cm_id_priv
->lock
);
2355 cm_process_work(cm_id_priv
, work
);
2357 cm_deref_id(cm_id_priv
);
2360 unlock
: spin_unlock_irq(&cm_id_priv
->lock
);
2361 deref
: cm_deref_id(cm_id_priv
);
2365 static int cm_drep_handler(struct cm_work
*work
)
2367 struct cm_id_private
*cm_id_priv
;
2368 struct cm_drep_msg
*drep_msg
;
2371 drep_msg
= (struct cm_drep_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2372 cm_id_priv
= cm_acquire_id(drep_msg
->remote_comm_id
,
2373 drep_msg
->local_comm_id
);
2377 work
->cm_event
.private_data
= &drep_msg
->private_data
;
2379 spin_lock_irq(&cm_id_priv
->lock
);
2380 if (cm_id_priv
->id
.state
!= IB_CM_DREQ_SENT
&&
2381 cm_id_priv
->id
.state
!= IB_CM_DREQ_RCVD
) {
2382 spin_unlock_irq(&cm_id_priv
->lock
);
2385 cm_enter_timewait(cm_id_priv
);
2387 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2388 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2390 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2391 spin_unlock_irq(&cm_id_priv
->lock
);
2394 cm_process_work(cm_id_priv
, work
);
2396 cm_deref_id(cm_id_priv
);
2399 cm_deref_id(cm_id_priv
);
2403 int ib_send_cm_rej(struct ib_cm_id
*cm_id
,
2404 enum ib_cm_rej_reason reason
,
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 unsigned long flags
;
2415 if ((private_data
&& private_data_len
> IB_CM_REJ_PRIVATE_DATA_SIZE
) ||
2416 (ari
&& ari_length
> IB_CM_REJ_ARI_LENGTH
))
2419 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2421 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2422 switch (cm_id
->state
) {
2423 case IB_CM_REQ_SENT
:
2424 case IB_CM_MRA_REQ_RCVD
:
2425 case IB_CM_REQ_RCVD
:
2426 case IB_CM_MRA_REQ_SENT
:
2427 case IB_CM_REP_RCVD
:
2428 case IB_CM_MRA_REP_SENT
:
2429 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2431 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
2432 cm_id_priv
, reason
, ari
, ari_length
,
2433 private_data
, private_data_len
);
2435 cm_reset_to_idle(cm_id_priv
);
2437 case IB_CM_REP_SENT
:
2438 case IB_CM_MRA_REP_RCVD
:
2439 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2441 cm_format_rej((struct cm_rej_msg
*) msg
->mad
,
2442 cm_id_priv
, reason
, ari
, ari_length
,
2443 private_data
, private_data_len
);
2445 cm_enter_timewait(cm_id_priv
);
2455 ret
= ib_post_send_mad(msg
, NULL
);
2459 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2462 EXPORT_SYMBOL(ib_send_cm_rej
);
2464 static void cm_format_rej_event(struct cm_work
*work
)
2466 struct cm_rej_msg
*rej_msg
;
2467 struct ib_cm_rej_event_param
*param
;
2469 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2470 param
= &work
->cm_event
.param
.rej_rcvd
;
2471 param
->ari
= rej_msg
->ari
;
2472 param
->ari_length
= cm_rej_get_reject_info_len(rej_msg
);
2473 param
->reason
= __be16_to_cpu(rej_msg
->reason
);
2474 work
->cm_event
.private_data
= &rej_msg
->private_data
;
2477 static struct cm_id_private
* cm_acquire_rejected_id(struct cm_rej_msg
*rej_msg
)
2479 struct cm_timewait_info
*timewait_info
;
2480 struct cm_id_private
*cm_id_priv
;
2483 remote_id
= rej_msg
->local_comm_id
;
2485 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_TIMEOUT
) {
2486 spin_lock_irq(&cm
.lock
);
2487 timewait_info
= cm_find_remote_id( *((__be64
*) rej_msg
->ari
),
2489 if (!timewait_info
) {
2490 spin_unlock_irq(&cm
.lock
);
2493 cm_id_priv
= idr_find(&cm
.local_id_table
, (__force
int)
2494 (timewait_info
->work
.local_id
^
2495 cm
.random_id_operand
));
2497 if (cm_id_priv
->id
.remote_id
== remote_id
)
2498 atomic_inc(&cm_id_priv
->refcount
);
2502 spin_unlock_irq(&cm
.lock
);
2503 } else if (cm_rej_get_msg_rejected(rej_msg
) == CM_MSG_RESPONSE_REQ
)
2504 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, 0);
2506 cm_id_priv
= cm_acquire_id(rej_msg
->remote_comm_id
, remote_id
);
2511 static int cm_rej_handler(struct cm_work
*work
)
2513 struct cm_id_private
*cm_id_priv
;
2514 struct cm_rej_msg
*rej_msg
;
2517 rej_msg
= (struct cm_rej_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2518 cm_id_priv
= cm_acquire_rejected_id(rej_msg
);
2522 cm_format_rej_event(work
);
2524 spin_lock_irq(&cm_id_priv
->lock
);
2525 switch (cm_id_priv
->id
.state
) {
2526 case IB_CM_REQ_SENT
:
2527 case IB_CM_MRA_REQ_RCVD
:
2528 case IB_CM_REP_SENT
:
2529 case IB_CM_MRA_REP_RCVD
:
2530 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2532 case IB_CM_REQ_RCVD
:
2533 case IB_CM_MRA_REQ_SENT
:
2534 if (__be16_to_cpu(rej_msg
->reason
) == IB_CM_REJ_STALE_CONN
)
2535 cm_enter_timewait(cm_id_priv
);
2537 cm_reset_to_idle(cm_id_priv
);
2539 case IB_CM_DREQ_SENT
:
2540 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
2542 case IB_CM_REP_RCVD
:
2543 case IB_CM_MRA_REP_SENT
:
2544 cm_enter_timewait(cm_id_priv
);
2546 case IB_CM_ESTABLISHED
:
2547 if (cm_id_priv
->id
.lap_state
== IB_CM_LAP_UNINIT
||
2548 cm_id_priv
->id
.lap_state
== IB_CM_LAP_SENT
) {
2549 if (cm_id_priv
->id
.lap_state
== IB_CM_LAP_SENT
)
2550 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
,
2552 cm_enter_timewait(cm_id_priv
);
2557 spin_unlock_irq(&cm_id_priv
->lock
);
2562 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2564 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2565 spin_unlock_irq(&cm_id_priv
->lock
);
2568 cm_process_work(cm_id_priv
, work
);
2570 cm_deref_id(cm_id_priv
);
2573 cm_deref_id(cm_id_priv
);
2577 int ib_send_cm_mra(struct ib_cm_id
*cm_id
,
2579 const void *private_data
,
2580 u8 private_data_len
)
2582 struct cm_id_private
*cm_id_priv
;
2583 struct ib_mad_send_buf
*msg
;
2584 enum ib_cm_state cm_state
;
2585 enum ib_cm_lap_state lap_state
;
2586 enum cm_msg_response msg_response
;
2588 unsigned long flags
;
2591 if (private_data
&& private_data_len
> IB_CM_MRA_PRIVATE_DATA_SIZE
)
2594 data
= cm_copy_private_data(private_data
, private_data_len
);
2596 return PTR_ERR(data
);
2598 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2600 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2601 switch(cm_id_priv
->id
.state
) {
2602 case IB_CM_REQ_RCVD
:
2603 cm_state
= IB_CM_MRA_REQ_SENT
;
2604 lap_state
= cm_id
->lap_state
;
2605 msg_response
= CM_MSG_RESPONSE_REQ
;
2607 case IB_CM_REP_RCVD
:
2608 cm_state
= IB_CM_MRA_REP_SENT
;
2609 lap_state
= cm_id
->lap_state
;
2610 msg_response
= CM_MSG_RESPONSE_REP
;
2612 case IB_CM_ESTABLISHED
:
2613 if (cm_id
->lap_state
== IB_CM_LAP_RCVD
) {
2614 cm_state
= cm_id
->state
;
2615 lap_state
= IB_CM_MRA_LAP_SENT
;
2616 msg_response
= CM_MSG_RESPONSE_OTHER
;
2624 if (!(service_timeout
& IB_CM_MRA_FLAG_DELAY
)) {
2625 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2629 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2630 msg_response
, service_timeout
,
2631 private_data
, private_data_len
);
2632 ret
= ib_post_send_mad(msg
, NULL
);
2637 cm_id
->state
= cm_state
;
2638 cm_id
->lap_state
= lap_state
;
2639 cm_id_priv
->service_timeout
= service_timeout
;
2640 cm_set_private_data(cm_id_priv
, data
, private_data_len
);
2641 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2644 error1
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2648 error2
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2653 EXPORT_SYMBOL(ib_send_cm_mra
);
2655 static struct cm_id_private
* cm_acquire_mraed_id(struct cm_mra_msg
*mra_msg
)
2657 switch (cm_mra_get_msg_mraed(mra_msg
)) {
2658 case CM_MSG_RESPONSE_REQ
:
2659 return cm_acquire_id(mra_msg
->remote_comm_id
, 0);
2660 case CM_MSG_RESPONSE_REP
:
2661 case CM_MSG_RESPONSE_OTHER
:
2662 return cm_acquire_id(mra_msg
->remote_comm_id
,
2663 mra_msg
->local_comm_id
);
2669 static int cm_mra_handler(struct cm_work
*work
)
2671 struct cm_id_private
*cm_id_priv
;
2672 struct cm_mra_msg
*mra_msg
;
2675 mra_msg
= (struct cm_mra_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2676 cm_id_priv
= cm_acquire_mraed_id(mra_msg
);
2680 work
->cm_event
.private_data
= &mra_msg
->private_data
;
2681 work
->cm_event
.param
.mra_rcvd
.service_timeout
=
2682 cm_mra_get_service_timeout(mra_msg
);
2683 timeout
= cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg
)) +
2684 cm_convert_to_ms(cm_id_priv
->av
.timeout
);
2686 spin_lock_irq(&cm_id_priv
->lock
);
2687 switch (cm_id_priv
->id
.state
) {
2688 case IB_CM_REQ_SENT
:
2689 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REQ
||
2690 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2691 cm_id_priv
->msg
, timeout
))
2693 cm_id_priv
->id
.state
= IB_CM_MRA_REQ_RCVD
;
2695 case IB_CM_REP_SENT
:
2696 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_REP
||
2697 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2698 cm_id_priv
->msg
, timeout
))
2700 cm_id_priv
->id
.state
= IB_CM_MRA_REP_RCVD
;
2702 case IB_CM_ESTABLISHED
:
2703 if (cm_mra_get_msg_mraed(mra_msg
) != CM_MSG_RESPONSE_OTHER
||
2704 cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
||
2705 ib_modify_mad(cm_id_priv
->av
.port
->mad_agent
,
2706 cm_id_priv
->msg
, timeout
)) {
2707 if (cm_id_priv
->id
.lap_state
== IB_CM_MRA_LAP_RCVD
)
2708 atomic_long_inc(&work
->port
->
2709 counter_group
[CM_RECV_DUPLICATES
].
2710 counter
[CM_MRA_COUNTER
]);
2713 cm_id_priv
->id
.lap_state
= IB_CM_MRA_LAP_RCVD
;
2715 case IB_CM_MRA_REQ_RCVD
:
2716 case IB_CM_MRA_REP_RCVD
:
2717 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2718 counter
[CM_MRA_COUNTER
]);
2724 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long)
2725 cm_id_priv
->id
.state
;
2726 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2728 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2729 spin_unlock_irq(&cm_id_priv
->lock
);
2732 cm_process_work(cm_id_priv
, work
);
2734 cm_deref_id(cm_id_priv
);
2737 spin_unlock_irq(&cm_id_priv
->lock
);
2738 cm_deref_id(cm_id_priv
);
2742 static void cm_format_lap(struct cm_lap_msg
*lap_msg
,
2743 struct cm_id_private
*cm_id_priv
,
2744 struct ib_sa_path_rec
*alternate_path
,
2745 const void *private_data
,
2746 u8 private_data_len
)
2748 cm_format_mad_hdr(&lap_msg
->hdr
, CM_LAP_ATTR_ID
,
2749 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_LAP
));
2750 lap_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2751 lap_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2752 cm_lap_set_remote_qpn(lap_msg
, cm_id_priv
->remote_qpn
);
2753 /* todo: need remote CM response timeout */
2754 cm_lap_set_remote_resp_timeout(lap_msg
, 0x1F);
2755 lap_msg
->alt_local_lid
= alternate_path
->slid
;
2756 lap_msg
->alt_remote_lid
= alternate_path
->dlid
;
2757 lap_msg
->alt_local_gid
= alternate_path
->sgid
;
2758 lap_msg
->alt_remote_gid
= alternate_path
->dgid
;
2759 cm_lap_set_flow_label(lap_msg
, alternate_path
->flow_label
);
2760 cm_lap_set_traffic_class(lap_msg
, alternate_path
->traffic_class
);
2761 lap_msg
->alt_hop_limit
= alternate_path
->hop_limit
;
2762 cm_lap_set_packet_rate(lap_msg
, alternate_path
->rate
);
2763 cm_lap_set_sl(lap_msg
, alternate_path
->sl
);
2764 cm_lap_set_subnet_local(lap_msg
, 1); /* local only... */
2765 cm_lap_set_local_ack_timeout(lap_msg
,
2766 cm_ack_timeout(cm_id_priv
->av
.port
->cm_dev
->ack_delay
,
2767 alternate_path
->packet_life_time
));
2769 if (private_data
&& private_data_len
)
2770 memcpy(lap_msg
->private_data
, private_data
, private_data_len
);
2773 int ib_send_cm_lap(struct ib_cm_id
*cm_id
,
2774 struct ib_sa_path_rec
*alternate_path
,
2775 const void *private_data
,
2776 u8 private_data_len
)
2778 struct cm_id_private
*cm_id_priv
;
2779 struct ib_mad_send_buf
*msg
;
2780 unsigned long flags
;
2783 if (private_data
&& private_data_len
> IB_CM_LAP_PRIVATE_DATA_SIZE
)
2786 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2787 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2788 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2789 (cm_id
->lap_state
!= IB_CM_LAP_UNINIT
&&
2790 cm_id
->lap_state
!= IB_CM_LAP_IDLE
)) {
2795 ret
= cm_init_av_by_path(alternate_path
, &cm_id_priv
->alt_av
,
2799 cm_id_priv
->alt_av
.timeout
=
2800 cm_ack_timeout(cm_id_priv
->target_ack_delay
,
2801 cm_id_priv
->alt_av
.timeout
- 1);
2803 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2807 cm_format_lap((struct cm_lap_msg
*) msg
->mad
, cm_id_priv
,
2808 alternate_path
, private_data
, private_data_len
);
2809 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
2810 msg
->context
[1] = (void *) (unsigned long) IB_CM_ESTABLISHED
;
2812 ret
= ib_post_send_mad(msg
, NULL
);
2814 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2819 cm_id
->lap_state
= IB_CM_LAP_SENT
;
2820 cm_id_priv
->msg
= msg
;
2822 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2825 EXPORT_SYMBOL(ib_send_cm_lap
);
2827 static void cm_format_path_from_lap(struct cm_id_private
*cm_id_priv
,
2828 struct ib_sa_path_rec
*path
,
2829 struct cm_lap_msg
*lap_msg
)
2831 memset(path
, 0, sizeof *path
);
2832 path
->dgid
= lap_msg
->alt_local_gid
;
2833 path
->sgid
= lap_msg
->alt_remote_gid
;
2834 path
->dlid
= lap_msg
->alt_local_lid
;
2835 path
->slid
= lap_msg
->alt_remote_lid
;
2836 path
->flow_label
= cm_lap_get_flow_label(lap_msg
);
2837 path
->hop_limit
= lap_msg
->alt_hop_limit
;
2838 path
->traffic_class
= cm_lap_get_traffic_class(lap_msg
);
2839 path
->reversible
= 1;
2840 path
->pkey
= cm_id_priv
->pkey
;
2841 path
->sl
= cm_lap_get_sl(lap_msg
);
2842 path
->mtu_selector
= IB_SA_EQ
;
2843 path
->mtu
= cm_id_priv
->path_mtu
;
2844 path
->rate_selector
= IB_SA_EQ
;
2845 path
->rate
= cm_lap_get_packet_rate(lap_msg
);
2846 path
->packet_life_time_selector
= IB_SA_EQ
;
2847 path
->packet_life_time
= cm_lap_get_local_ack_timeout(lap_msg
);
2848 path
->packet_life_time
-= (path
->packet_life_time
> 0);
2851 static int cm_lap_handler(struct cm_work
*work
)
2853 struct cm_id_private
*cm_id_priv
;
2854 struct cm_lap_msg
*lap_msg
;
2855 struct ib_cm_lap_event_param
*param
;
2856 struct ib_mad_send_buf
*msg
= NULL
;
2859 /* todo: verify LAP request and send reject APR if invalid. */
2860 lap_msg
= (struct cm_lap_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2861 cm_id_priv
= cm_acquire_id(lap_msg
->remote_comm_id
,
2862 lap_msg
->local_comm_id
);
2866 param
= &work
->cm_event
.param
.lap_rcvd
;
2867 param
->alternate_path
= &work
->path
[0];
2868 cm_format_path_from_lap(cm_id_priv
, param
->alternate_path
, lap_msg
);
2869 work
->cm_event
.private_data
= &lap_msg
->private_data
;
2871 spin_lock_irq(&cm_id_priv
->lock
);
2872 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
)
2875 switch (cm_id_priv
->id
.lap_state
) {
2876 case IB_CM_LAP_UNINIT
:
2877 case IB_CM_LAP_IDLE
:
2879 case IB_CM_MRA_LAP_SENT
:
2880 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2881 counter
[CM_LAP_COUNTER
]);
2882 if (cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
))
2885 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
2886 CM_MSG_RESPONSE_OTHER
,
2887 cm_id_priv
->service_timeout
,
2888 cm_id_priv
->private_data
,
2889 cm_id_priv
->private_data_len
);
2890 spin_unlock_irq(&cm_id_priv
->lock
);
2892 if (ib_post_send_mad(msg
, NULL
))
2895 case IB_CM_LAP_RCVD
:
2896 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
2897 counter
[CM_LAP_COUNTER
]);
2903 cm_id_priv
->id
.lap_state
= IB_CM_LAP_RCVD
;
2904 cm_id_priv
->tid
= lap_msg
->hdr
.tid
;
2905 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
2906 work
->mad_recv_wc
->recv_buf
.grh
,
2908 cm_init_av_by_path(param
->alternate_path
, &cm_id_priv
->alt_av
,
2910 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
2912 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
2913 spin_unlock_irq(&cm_id_priv
->lock
);
2916 cm_process_work(cm_id_priv
, work
);
2918 cm_deref_id(cm_id_priv
);
2921 unlock
: spin_unlock_irq(&cm_id_priv
->lock
);
2922 deref
: cm_deref_id(cm_id_priv
);
2926 static void cm_format_apr(struct cm_apr_msg
*apr_msg
,
2927 struct cm_id_private
*cm_id_priv
,
2928 enum ib_cm_apr_status status
,
2931 const void *private_data
,
2932 u8 private_data_len
)
2934 cm_format_mad_hdr(&apr_msg
->hdr
, CM_APR_ATTR_ID
, cm_id_priv
->tid
);
2935 apr_msg
->local_comm_id
= cm_id_priv
->id
.local_id
;
2936 apr_msg
->remote_comm_id
= cm_id_priv
->id
.remote_id
;
2937 apr_msg
->ap_status
= (u8
) status
;
2939 if (info
&& info_length
) {
2940 apr_msg
->info_length
= info_length
;
2941 memcpy(apr_msg
->info
, info
, info_length
);
2944 if (private_data
&& private_data_len
)
2945 memcpy(apr_msg
->private_data
, private_data
, private_data_len
);
2948 int ib_send_cm_apr(struct ib_cm_id
*cm_id
,
2949 enum ib_cm_apr_status status
,
2952 const void *private_data
,
2953 u8 private_data_len
)
2955 struct cm_id_private
*cm_id_priv
;
2956 struct ib_mad_send_buf
*msg
;
2957 unsigned long flags
;
2960 if ((private_data
&& private_data_len
> IB_CM_APR_PRIVATE_DATA_SIZE
) ||
2961 (info
&& info_length
> IB_CM_APR_INFO_LENGTH
))
2964 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
2965 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
2966 if (cm_id
->state
!= IB_CM_ESTABLISHED
||
2967 (cm_id
->lap_state
!= IB_CM_LAP_RCVD
&&
2968 cm_id
->lap_state
!= IB_CM_MRA_LAP_SENT
)) {
2973 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
2977 cm_format_apr((struct cm_apr_msg
*) msg
->mad
, cm_id_priv
, status
,
2978 info
, info_length
, private_data
, private_data_len
);
2979 ret
= ib_post_send_mad(msg
, NULL
);
2981 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2986 cm_id
->lap_state
= IB_CM_LAP_IDLE
;
2987 out
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
2990 EXPORT_SYMBOL(ib_send_cm_apr
);
2992 static int cm_apr_handler(struct cm_work
*work
)
2994 struct cm_id_private
*cm_id_priv
;
2995 struct cm_apr_msg
*apr_msg
;
2998 apr_msg
= (struct cm_apr_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2999 cm_id_priv
= cm_acquire_id(apr_msg
->remote_comm_id
,
3000 apr_msg
->local_comm_id
);
3002 return -EINVAL
; /* Unmatched reply. */
3004 work
->cm_event
.param
.apr_rcvd
.ap_status
= apr_msg
->ap_status
;
3005 work
->cm_event
.param
.apr_rcvd
.apr_info
= &apr_msg
->info
;
3006 work
->cm_event
.param
.apr_rcvd
.info_len
= apr_msg
->info_length
;
3007 work
->cm_event
.private_data
= &apr_msg
->private_data
;
3009 spin_lock_irq(&cm_id_priv
->lock
);
3010 if (cm_id_priv
->id
.state
!= IB_CM_ESTABLISHED
||
3011 (cm_id_priv
->id
.lap_state
!= IB_CM_LAP_SENT
&&
3012 cm_id_priv
->id
.lap_state
!= IB_CM_MRA_LAP_RCVD
)) {
3013 spin_unlock_irq(&cm_id_priv
->lock
);
3016 cm_id_priv
->id
.lap_state
= IB_CM_LAP_IDLE
;
3017 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
3018 cm_id_priv
->msg
= NULL
;
3020 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
3022 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
3023 spin_unlock_irq(&cm_id_priv
->lock
);
3026 cm_process_work(cm_id_priv
, work
);
3028 cm_deref_id(cm_id_priv
);
3031 cm_deref_id(cm_id_priv
);
3035 static int cm_timewait_handler(struct cm_work
*work
)
3037 struct cm_timewait_info
*timewait_info
;
3038 struct cm_id_private
*cm_id_priv
;
3041 timewait_info
= (struct cm_timewait_info
*)work
;
3042 spin_lock_irq(&cm
.lock
);
3043 list_del(&timewait_info
->list
);
3044 spin_unlock_irq(&cm
.lock
);
3046 cm_id_priv
= cm_acquire_id(timewait_info
->work
.local_id
,
3047 timewait_info
->work
.remote_id
);
3051 spin_lock_irq(&cm_id_priv
->lock
);
3052 if (cm_id_priv
->id
.state
!= IB_CM_TIMEWAIT
||
3053 cm_id_priv
->remote_qpn
!= timewait_info
->remote_qpn
) {
3054 spin_unlock_irq(&cm_id_priv
->lock
);
3057 cm_id_priv
->id
.state
= IB_CM_IDLE
;
3058 ret
= atomic_inc_and_test(&cm_id_priv
->work_count
);
3060 list_add_tail(&work
->list
, &cm_id_priv
->work_list
);
3061 spin_unlock_irq(&cm_id_priv
->lock
);
3064 cm_process_work(cm_id_priv
, work
);
3066 cm_deref_id(cm_id_priv
);
3069 cm_deref_id(cm_id_priv
);
3073 static void cm_format_sidr_req(struct cm_sidr_req_msg
*sidr_req_msg
,
3074 struct cm_id_private
*cm_id_priv
,
3075 struct ib_cm_sidr_req_param
*param
)
3077 cm_format_mad_hdr(&sidr_req_msg
->hdr
, CM_SIDR_REQ_ATTR_ID
,
3078 cm_form_tid(cm_id_priv
, CM_MSG_SEQUENCE_SIDR
));
3079 sidr_req_msg
->request_id
= cm_id_priv
->id
.local_id
;
3080 sidr_req_msg
->pkey
= param
->path
->pkey
;
3081 sidr_req_msg
->service_id
= param
->service_id
;
3083 if (param
->private_data
&& param
->private_data_len
)
3084 memcpy(sidr_req_msg
->private_data
, param
->private_data
,
3085 param
->private_data_len
);
3088 int ib_send_cm_sidr_req(struct ib_cm_id
*cm_id
,
3089 struct ib_cm_sidr_req_param
*param
)
3091 struct cm_id_private
*cm_id_priv
;
3092 struct ib_mad_send_buf
*msg
;
3093 unsigned long flags
;
3096 if (!param
->path
|| (param
->private_data
&&
3097 param
->private_data_len
> IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
))
3100 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3101 ret
= cm_init_av_by_path(param
->path
, &cm_id_priv
->av
, cm_id_priv
);
3105 cm_id
->service_id
= param
->service_id
;
3106 cm_id
->service_mask
= ~cpu_to_be64(0);
3107 cm_id_priv
->timeout_ms
= param
->timeout_ms
;
3108 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
3109 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
3113 cm_format_sidr_req((struct cm_sidr_req_msg
*) msg
->mad
, cm_id_priv
,
3115 msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
3116 msg
->context
[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT
;
3118 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3119 if (cm_id
->state
== IB_CM_IDLE
)
3120 ret
= ib_post_send_mad(msg
, NULL
);
3125 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3129 cm_id
->state
= IB_CM_SIDR_REQ_SENT
;
3130 cm_id_priv
->msg
= msg
;
3131 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3135 EXPORT_SYMBOL(ib_send_cm_sidr_req
);
3137 static void cm_format_sidr_req_event(struct cm_work
*work
,
3138 struct ib_cm_id
*listen_id
)
3140 struct cm_sidr_req_msg
*sidr_req_msg
;
3141 struct ib_cm_sidr_req_event_param
*param
;
3143 sidr_req_msg
= (struct cm_sidr_req_msg
*)
3144 work
->mad_recv_wc
->recv_buf
.mad
;
3145 param
= &work
->cm_event
.param
.sidr_req_rcvd
;
3146 param
->pkey
= __be16_to_cpu(sidr_req_msg
->pkey
);
3147 param
->listen_id
= listen_id
;
3148 param
->service_id
= sidr_req_msg
->service_id
;
3149 param
->bth_pkey
= cm_get_bth_pkey(work
);
3150 param
->port
= work
->port
->port_num
;
3151 work
->cm_event
.private_data
= &sidr_req_msg
->private_data
;
3154 static int cm_sidr_req_handler(struct cm_work
*work
)
3156 struct ib_cm_id
*cm_id
;
3157 struct cm_id_private
*cm_id_priv
, *cur_cm_id_priv
;
3158 struct cm_sidr_req_msg
*sidr_req_msg
;
3161 cm_id
= ib_create_cm_id(work
->port
->cm_dev
->ib_device
, NULL
, NULL
);
3163 return PTR_ERR(cm_id
);
3164 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3166 /* Record SGID/SLID and request ID for lookup. */
3167 sidr_req_msg
= (struct cm_sidr_req_msg
*)
3168 work
->mad_recv_wc
->recv_buf
.mad
;
3169 wc
= work
->mad_recv_wc
->wc
;
3170 cm_id_priv
->av
.dgid
.global
.subnet_prefix
= cpu_to_be64(wc
->slid
);
3171 cm_id_priv
->av
.dgid
.global
.interface_id
= 0;
3172 cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
3173 work
->mad_recv_wc
->recv_buf
.grh
,
3175 cm_id_priv
->id
.remote_id
= sidr_req_msg
->request_id
;
3176 cm_id_priv
->tid
= sidr_req_msg
->hdr
.tid
;
3177 atomic_inc(&cm_id_priv
->work_count
);
3179 spin_lock_irq(&cm
.lock
);
3180 cur_cm_id_priv
= cm_insert_remote_sidr(cm_id_priv
);
3181 if (cur_cm_id_priv
) {
3182 spin_unlock_irq(&cm
.lock
);
3183 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
3184 counter
[CM_SIDR_REQ_COUNTER
]);
3185 goto out
; /* Duplicate message. */
3187 cm_id_priv
->id
.state
= IB_CM_SIDR_REQ_RCVD
;
3188 cur_cm_id_priv
= cm_find_listen(cm_id
->device
,
3189 sidr_req_msg
->service_id
);
3190 if (!cur_cm_id_priv
) {
3191 spin_unlock_irq(&cm
.lock
);
3192 cm_reject_sidr_req(cm_id_priv
, IB_SIDR_UNSUPPORTED
);
3193 goto out
; /* No match. */
3195 atomic_inc(&cur_cm_id_priv
->refcount
);
3196 atomic_inc(&cm_id_priv
->refcount
);
3197 spin_unlock_irq(&cm
.lock
);
3199 cm_id_priv
->id
.cm_handler
= cur_cm_id_priv
->id
.cm_handler
;
3200 cm_id_priv
->id
.context
= cur_cm_id_priv
->id
.context
;
3201 cm_id_priv
->id
.service_id
= sidr_req_msg
->service_id
;
3202 cm_id_priv
->id
.service_mask
= ~cpu_to_be64(0);
3204 cm_format_sidr_req_event(work
, &cur_cm_id_priv
->id
);
3205 cm_process_work(cm_id_priv
, work
);
3206 cm_deref_id(cur_cm_id_priv
);
3209 ib_destroy_cm_id(&cm_id_priv
->id
);
3213 static void cm_format_sidr_rep(struct cm_sidr_rep_msg
*sidr_rep_msg
,
3214 struct cm_id_private
*cm_id_priv
,
3215 struct ib_cm_sidr_rep_param
*param
)
3217 cm_format_mad_hdr(&sidr_rep_msg
->hdr
, CM_SIDR_REP_ATTR_ID
,
3219 sidr_rep_msg
->request_id
= cm_id_priv
->id
.remote_id
;
3220 sidr_rep_msg
->status
= param
->status
;
3221 cm_sidr_rep_set_qpn(sidr_rep_msg
, cpu_to_be32(param
->qp_num
));
3222 sidr_rep_msg
->service_id
= cm_id_priv
->id
.service_id
;
3223 sidr_rep_msg
->qkey
= cpu_to_be32(param
->qkey
);
3225 if (param
->info
&& param
->info_length
)
3226 memcpy(sidr_rep_msg
->info
, param
->info
, param
->info_length
);
3228 if (param
->private_data
&& param
->private_data_len
)
3229 memcpy(sidr_rep_msg
->private_data
, param
->private_data
,
3230 param
->private_data_len
);
3233 int ib_send_cm_sidr_rep(struct ib_cm_id
*cm_id
,
3234 struct ib_cm_sidr_rep_param
*param
)
3236 struct cm_id_private
*cm_id_priv
;
3237 struct ib_mad_send_buf
*msg
;
3238 unsigned long flags
;
3241 if ((param
->info
&& param
->info_length
> IB_CM_SIDR_REP_INFO_LENGTH
) ||
3242 (param
->private_data
&&
3243 param
->private_data_len
> IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
))
3246 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3247 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3248 if (cm_id
->state
!= IB_CM_SIDR_REQ_RCVD
) {
3253 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
3257 cm_format_sidr_rep((struct cm_sidr_rep_msg
*) msg
->mad
, cm_id_priv
,
3259 ret
= ib_post_send_mad(msg
, NULL
);
3261 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3265 cm_id
->state
= IB_CM_IDLE
;
3266 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3268 spin_lock_irqsave(&cm
.lock
, flags
);
3269 if (!RB_EMPTY_NODE(&cm_id_priv
->sidr_id_node
)) {
3270 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
3271 RB_CLEAR_NODE(&cm_id_priv
->sidr_id_node
);
3273 spin_unlock_irqrestore(&cm
.lock
, flags
);
3276 error
: spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3279 EXPORT_SYMBOL(ib_send_cm_sidr_rep
);
3281 static void cm_format_sidr_rep_event(struct cm_work
*work
)
3283 struct cm_sidr_rep_msg
*sidr_rep_msg
;
3284 struct ib_cm_sidr_rep_event_param
*param
;
3286 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
3287 work
->mad_recv_wc
->recv_buf
.mad
;
3288 param
= &work
->cm_event
.param
.sidr_rep_rcvd
;
3289 param
->status
= sidr_rep_msg
->status
;
3290 param
->qkey
= be32_to_cpu(sidr_rep_msg
->qkey
);
3291 param
->qpn
= be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg
));
3292 param
->info
= &sidr_rep_msg
->info
;
3293 param
->info_len
= sidr_rep_msg
->info_length
;
3294 work
->cm_event
.private_data
= &sidr_rep_msg
->private_data
;
3297 static int cm_sidr_rep_handler(struct cm_work
*work
)
3299 struct cm_sidr_rep_msg
*sidr_rep_msg
;
3300 struct cm_id_private
*cm_id_priv
;
3302 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
3303 work
->mad_recv_wc
->recv_buf
.mad
;
3304 cm_id_priv
= cm_acquire_id(sidr_rep_msg
->request_id
, 0);
3306 return -EINVAL
; /* Unmatched reply. */
3308 spin_lock_irq(&cm_id_priv
->lock
);
3309 if (cm_id_priv
->id
.state
!= IB_CM_SIDR_REQ_SENT
) {
3310 spin_unlock_irq(&cm_id_priv
->lock
);
3313 cm_id_priv
->id
.state
= IB_CM_IDLE
;
3314 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
3315 spin_unlock_irq(&cm_id_priv
->lock
);
3317 cm_format_sidr_rep_event(work
);
3318 cm_process_work(cm_id_priv
, work
);
3321 cm_deref_id(cm_id_priv
);
3325 static void cm_process_send_error(struct ib_mad_send_buf
*msg
,
3326 enum ib_wc_status wc_status
)
3328 struct cm_id_private
*cm_id_priv
;
3329 struct ib_cm_event cm_event
;
3330 enum ib_cm_state state
;
3333 memset(&cm_event
, 0, sizeof cm_event
);
3334 cm_id_priv
= msg
->context
[0];
3336 /* Discard old sends or ones without a response. */
3337 spin_lock_irq(&cm_id_priv
->lock
);
3338 state
= (enum ib_cm_state
) (unsigned long) msg
->context
[1];
3339 if (msg
!= cm_id_priv
->msg
|| state
!= cm_id_priv
->id
.state
)
3343 case IB_CM_REQ_SENT
:
3344 case IB_CM_MRA_REQ_RCVD
:
3345 cm_reset_to_idle(cm_id_priv
);
3346 cm_event
.event
= IB_CM_REQ_ERROR
;
3348 case IB_CM_REP_SENT
:
3349 case IB_CM_MRA_REP_RCVD
:
3350 cm_reset_to_idle(cm_id_priv
);
3351 cm_event
.event
= IB_CM_REP_ERROR
;
3353 case IB_CM_DREQ_SENT
:
3354 cm_enter_timewait(cm_id_priv
);
3355 cm_event
.event
= IB_CM_DREQ_ERROR
;
3357 case IB_CM_SIDR_REQ_SENT
:
3358 cm_id_priv
->id
.state
= IB_CM_IDLE
;
3359 cm_event
.event
= IB_CM_SIDR_REQ_ERROR
;
3364 spin_unlock_irq(&cm_id_priv
->lock
);
3365 cm_event
.param
.send_status
= wc_status
;
3367 /* No other events can occur on the cm_id at this point. */
3368 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &cm_event
);
3371 ib_destroy_cm_id(&cm_id_priv
->id
);
3374 spin_unlock_irq(&cm_id_priv
->lock
);
3378 static void cm_send_handler(struct ib_mad_agent
*mad_agent
,
3379 struct ib_mad_send_wc
*mad_send_wc
)
3381 struct ib_mad_send_buf
*msg
= mad_send_wc
->send_buf
;
3382 struct cm_port
*port
;
3385 port
= mad_agent
->context
;
3386 attr_index
= be16_to_cpu(((struct ib_mad_hdr
*)
3387 msg
->mad
)->attr_id
) - CM_ATTR_ID_OFFSET
;
3390 * If the send was in response to a received message (context[0] is not
3391 * set to a cm_id), and is not a REJ, then it is a send that was
3394 if (!msg
->context
[0] && (attr_index
!= CM_REJ_COUNTER
))
3397 atomic_long_add(1 + msg
->retries
,
3398 &port
->counter_group
[CM_XMIT
].counter
[attr_index
]);
3400 atomic_long_add(msg
->retries
,
3401 &port
->counter_group
[CM_XMIT_RETRIES
].
3402 counter
[attr_index
]);
3404 switch (mad_send_wc
->status
) {
3406 case IB_WC_WR_FLUSH_ERR
:
3410 if (msg
->context
[0] && msg
->context
[1])
3411 cm_process_send_error(msg
, mad_send_wc
->status
);
3418 static void cm_work_handler(struct work_struct
*_work
)
3420 struct cm_work
*work
= container_of(_work
, struct cm_work
, work
.work
);
3423 switch (work
->cm_event
.event
) {
3424 case IB_CM_REQ_RECEIVED
:
3425 ret
= cm_req_handler(work
);
3427 case IB_CM_MRA_RECEIVED
:
3428 ret
= cm_mra_handler(work
);
3430 case IB_CM_REJ_RECEIVED
:
3431 ret
= cm_rej_handler(work
);
3433 case IB_CM_REP_RECEIVED
:
3434 ret
= cm_rep_handler(work
);
3436 case IB_CM_RTU_RECEIVED
:
3437 ret
= cm_rtu_handler(work
);
3439 case IB_CM_USER_ESTABLISHED
:
3440 ret
= cm_establish_handler(work
);
3442 case IB_CM_DREQ_RECEIVED
:
3443 ret
= cm_dreq_handler(work
);
3445 case IB_CM_DREP_RECEIVED
:
3446 ret
= cm_drep_handler(work
);
3448 case IB_CM_SIDR_REQ_RECEIVED
:
3449 ret
= cm_sidr_req_handler(work
);
3451 case IB_CM_SIDR_REP_RECEIVED
:
3452 ret
= cm_sidr_rep_handler(work
);
3454 case IB_CM_LAP_RECEIVED
:
3455 ret
= cm_lap_handler(work
);
3457 case IB_CM_APR_RECEIVED
:
3458 ret
= cm_apr_handler(work
);
3460 case IB_CM_TIMEWAIT_EXIT
:
3461 ret
= cm_timewait_handler(work
);
3471 static int cm_establish(struct ib_cm_id
*cm_id
)
3473 struct cm_id_private
*cm_id_priv
;
3474 struct cm_work
*work
;
3475 unsigned long flags
;
3477 struct cm_device
*cm_dev
;
3479 cm_dev
= ib_get_client_data(cm_id
->device
, &cm_client
);
3483 work
= kmalloc(sizeof *work
, GFP_ATOMIC
);
3487 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3488 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3489 switch (cm_id
->state
)
3491 case IB_CM_REP_SENT
:
3492 case IB_CM_MRA_REP_RCVD
:
3493 cm_id
->state
= IB_CM_ESTABLISHED
;
3495 case IB_CM_ESTABLISHED
:
3502 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3510 * The CM worker thread may try to destroy the cm_id before it
3511 * can execute this work item. To prevent potential deadlock,
3512 * we need to find the cm_id once we're in the context of the
3513 * worker thread, rather than holding a reference on it.
3515 INIT_DELAYED_WORK(&work
->work
, cm_work_handler
);
3516 work
->local_id
= cm_id
->local_id
;
3517 work
->remote_id
= cm_id
->remote_id
;
3518 work
->mad_recv_wc
= NULL
;
3519 work
->cm_event
.event
= IB_CM_USER_ESTABLISHED
;
3521 /* Check if the device started its remove_one */
3522 spin_lock_irqsave(&cm
.lock
, flags
);
3523 if (!cm_dev
->going_down
) {
3524 queue_delayed_work(cm
.wq
, &work
->work
, 0);
3529 spin_unlock_irqrestore(&cm
.lock
, flags
);
3535 static int cm_migrate(struct ib_cm_id
*cm_id
)
3537 struct cm_id_private
*cm_id_priv
;
3538 struct cm_av tmp_av
;
3539 unsigned long flags
;
3540 int tmp_send_port_not_ready
;
3543 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3544 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3545 if (cm_id
->state
== IB_CM_ESTABLISHED
&&
3546 (cm_id
->lap_state
== IB_CM_LAP_UNINIT
||
3547 cm_id
->lap_state
== IB_CM_LAP_IDLE
)) {
3548 cm_id
->lap_state
= IB_CM_LAP_IDLE
;
3549 /* Swap address vector */
3550 tmp_av
= cm_id_priv
->av
;
3551 cm_id_priv
->av
= cm_id_priv
->alt_av
;
3552 cm_id_priv
->alt_av
= tmp_av
;
3553 /* Swap port send ready state */
3554 tmp_send_port_not_ready
= cm_id_priv
->prim_send_port_not_ready
;
3555 cm_id_priv
->prim_send_port_not_ready
= cm_id_priv
->altr_send_port_not_ready
;
3556 cm_id_priv
->altr_send_port_not_ready
= tmp_send_port_not_ready
;
3559 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3564 int ib_cm_notify(struct ib_cm_id
*cm_id
, enum ib_event_type event
)
3569 case IB_EVENT_COMM_EST
:
3570 ret
= cm_establish(cm_id
);
3572 case IB_EVENT_PATH_MIG
:
3573 ret
= cm_migrate(cm_id
);
3580 EXPORT_SYMBOL(ib_cm_notify
);
3582 static void cm_recv_handler(struct ib_mad_agent
*mad_agent
,
3583 struct ib_mad_send_buf
*send_buf
,
3584 struct ib_mad_recv_wc
*mad_recv_wc
)
3586 struct cm_port
*port
= mad_agent
->context
;
3587 struct cm_work
*work
;
3588 enum ib_cm_event_type event
;
3593 switch (mad_recv_wc
->recv_buf
.mad
->mad_hdr
.attr_id
) {
3594 case CM_REQ_ATTR_ID
:
3595 paths
= 1 + (((struct cm_req_msg
*) mad_recv_wc
->recv_buf
.mad
)->
3596 alt_local_lid
!= 0);
3597 event
= IB_CM_REQ_RECEIVED
;
3599 case CM_MRA_ATTR_ID
:
3600 event
= IB_CM_MRA_RECEIVED
;
3602 case CM_REJ_ATTR_ID
:
3603 event
= IB_CM_REJ_RECEIVED
;
3605 case CM_REP_ATTR_ID
:
3606 event
= IB_CM_REP_RECEIVED
;
3608 case CM_RTU_ATTR_ID
:
3609 event
= IB_CM_RTU_RECEIVED
;
3611 case CM_DREQ_ATTR_ID
:
3612 event
= IB_CM_DREQ_RECEIVED
;
3614 case CM_DREP_ATTR_ID
:
3615 event
= IB_CM_DREP_RECEIVED
;
3617 case CM_SIDR_REQ_ATTR_ID
:
3618 event
= IB_CM_SIDR_REQ_RECEIVED
;
3620 case CM_SIDR_REP_ATTR_ID
:
3621 event
= IB_CM_SIDR_REP_RECEIVED
;
3623 case CM_LAP_ATTR_ID
:
3625 event
= IB_CM_LAP_RECEIVED
;
3627 case CM_APR_ATTR_ID
:
3628 event
= IB_CM_APR_RECEIVED
;
3631 ib_free_recv_mad(mad_recv_wc
);
3635 attr_id
= be16_to_cpu(mad_recv_wc
->recv_buf
.mad
->mad_hdr
.attr_id
);
3636 atomic_long_inc(&port
->counter_group
[CM_RECV
].
3637 counter
[attr_id
- CM_ATTR_ID_OFFSET
]);
3639 work
= kmalloc(sizeof *work
+ sizeof(struct ib_sa_path_rec
) * paths
,
3642 ib_free_recv_mad(mad_recv_wc
);
3646 INIT_DELAYED_WORK(&work
->work
, cm_work_handler
);
3647 work
->cm_event
.event
= event
;
3648 work
->mad_recv_wc
= mad_recv_wc
;
3651 /* Check if the device started its remove_one */
3652 spin_lock_irq(&cm
.lock
);
3653 if (!port
->cm_dev
->going_down
)
3654 queue_delayed_work(cm
.wq
, &work
->work
, 0);
3657 spin_unlock_irq(&cm
.lock
);
3661 ib_free_recv_mad(mad_recv_wc
);
3665 static int cm_init_qp_init_attr(struct cm_id_private
*cm_id_priv
,
3666 struct ib_qp_attr
*qp_attr
,
3669 unsigned long flags
;
3672 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3673 switch (cm_id_priv
->id
.state
) {
3674 case IB_CM_REQ_SENT
:
3675 case IB_CM_MRA_REQ_RCVD
:
3676 case IB_CM_REQ_RCVD
:
3677 case IB_CM_MRA_REQ_SENT
:
3678 case IB_CM_REP_RCVD
:
3679 case IB_CM_MRA_REP_SENT
:
3680 case IB_CM_REP_SENT
:
3681 case IB_CM_MRA_REP_RCVD
:
3682 case IB_CM_ESTABLISHED
:
3683 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
|
3684 IB_QP_PKEY_INDEX
| IB_QP_PORT
;
3685 qp_attr
->qp_access_flags
= IB_ACCESS_REMOTE_WRITE
;
3686 if (cm_id_priv
->responder_resources
)
3687 qp_attr
->qp_access_flags
|= IB_ACCESS_REMOTE_READ
|
3688 IB_ACCESS_REMOTE_ATOMIC
;
3689 qp_attr
->pkey_index
= cm_id_priv
->av
.pkey_index
;
3690 qp_attr
->port_num
= cm_id_priv
->av
.port
->port_num
;
3697 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3701 static int cm_init_qp_rtr_attr(struct cm_id_private
*cm_id_priv
,
3702 struct ib_qp_attr
*qp_attr
,
3705 unsigned long flags
;
3708 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3709 switch (cm_id_priv
->id
.state
) {
3710 case IB_CM_REQ_RCVD
:
3711 case IB_CM_MRA_REQ_SENT
:
3712 case IB_CM_REP_RCVD
:
3713 case IB_CM_MRA_REP_SENT
:
3714 case IB_CM_REP_SENT
:
3715 case IB_CM_MRA_REP_RCVD
:
3716 case IB_CM_ESTABLISHED
:
3717 *qp_attr_mask
= IB_QP_STATE
| IB_QP_AV
| IB_QP_PATH_MTU
|
3718 IB_QP_DEST_QPN
| IB_QP_RQ_PSN
;
3719 qp_attr
->ah_attr
= cm_id_priv
->av
.ah_attr
;
3720 qp_attr
->path_mtu
= cm_id_priv
->path_mtu
;
3721 qp_attr
->dest_qp_num
= be32_to_cpu(cm_id_priv
->remote_qpn
);
3722 qp_attr
->rq_psn
= be32_to_cpu(cm_id_priv
->rq_psn
);
3723 if (cm_id_priv
->qp_type
== IB_QPT_RC
||
3724 cm_id_priv
->qp_type
== IB_QPT_XRC_TGT
) {
3725 *qp_attr_mask
|= IB_QP_MAX_DEST_RD_ATOMIC
|
3726 IB_QP_MIN_RNR_TIMER
;
3727 qp_attr
->max_dest_rd_atomic
=
3728 cm_id_priv
->responder_resources
;
3729 qp_attr
->min_rnr_timer
= 0;
3731 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3732 *qp_attr_mask
|= IB_QP_ALT_PATH
;
3733 qp_attr
->alt_port_num
= cm_id_priv
->alt_av
.port
->port_num
;
3734 qp_attr
->alt_pkey_index
= cm_id_priv
->alt_av
.pkey_index
;
3735 qp_attr
->alt_timeout
= cm_id_priv
->alt_av
.timeout
;
3736 qp_attr
->alt_ah_attr
= cm_id_priv
->alt_av
.ah_attr
;
3744 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3748 static int cm_init_qp_rts_attr(struct cm_id_private
*cm_id_priv
,
3749 struct ib_qp_attr
*qp_attr
,
3752 unsigned long flags
;
3755 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3756 switch (cm_id_priv
->id
.state
) {
3757 /* Allow transition to RTS before sending REP */
3758 case IB_CM_REQ_RCVD
:
3759 case IB_CM_MRA_REQ_SENT
:
3761 case IB_CM_REP_RCVD
:
3762 case IB_CM_MRA_REP_SENT
:
3763 case IB_CM_REP_SENT
:
3764 case IB_CM_MRA_REP_RCVD
:
3765 case IB_CM_ESTABLISHED
:
3766 if (cm_id_priv
->id
.lap_state
== IB_CM_LAP_UNINIT
) {
3767 *qp_attr_mask
= IB_QP_STATE
| IB_QP_SQ_PSN
;
3768 qp_attr
->sq_psn
= be32_to_cpu(cm_id_priv
->sq_psn
);
3769 switch (cm_id_priv
->qp_type
) {
3771 case IB_QPT_XRC_INI
:
3772 *qp_attr_mask
|= IB_QP_RETRY_CNT
| IB_QP_RNR_RETRY
|
3773 IB_QP_MAX_QP_RD_ATOMIC
;
3774 qp_attr
->retry_cnt
= cm_id_priv
->retry_count
;
3775 qp_attr
->rnr_retry
= cm_id_priv
->rnr_retry_count
;
3776 qp_attr
->max_rd_atomic
= cm_id_priv
->initiator_depth
;
3778 case IB_QPT_XRC_TGT
:
3779 *qp_attr_mask
|= IB_QP_TIMEOUT
;
3780 qp_attr
->timeout
= cm_id_priv
->av
.timeout
;
3785 if (cm_id_priv
->alt_av
.ah_attr
.dlid
) {
3786 *qp_attr_mask
|= IB_QP_PATH_MIG_STATE
;
3787 qp_attr
->path_mig_state
= IB_MIG_REARM
;
3790 *qp_attr_mask
= IB_QP_ALT_PATH
| IB_QP_PATH_MIG_STATE
;
3791 qp_attr
->alt_port_num
= cm_id_priv
->alt_av
.port
->port_num
;
3792 qp_attr
->alt_pkey_index
= cm_id_priv
->alt_av
.pkey_index
;
3793 qp_attr
->alt_timeout
= cm_id_priv
->alt_av
.timeout
;
3794 qp_attr
->alt_ah_attr
= cm_id_priv
->alt_av
.ah_attr
;
3795 qp_attr
->path_mig_state
= IB_MIG_REARM
;
3803 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3807 int ib_cm_init_qp_attr(struct ib_cm_id
*cm_id
,
3808 struct ib_qp_attr
*qp_attr
,
3811 struct cm_id_private
*cm_id_priv
;
3814 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3815 switch (qp_attr
->qp_state
) {
3817 ret
= cm_init_qp_init_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3820 ret
= cm_init_qp_rtr_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3823 ret
= cm_init_qp_rts_attr(cm_id_priv
, qp_attr
, qp_attr_mask
);
3831 EXPORT_SYMBOL(ib_cm_init_qp_attr
);
3833 static ssize_t
cm_show_counter(struct kobject
*obj
, struct attribute
*attr
,
3836 struct cm_counter_group
*group
;
3837 struct cm_counter_attribute
*cm_attr
;
3839 group
= container_of(obj
, struct cm_counter_group
, obj
);
3840 cm_attr
= container_of(attr
, struct cm_counter_attribute
, attr
);
3842 return sprintf(buf
, "%ld\n",
3843 atomic_long_read(&group
->counter
[cm_attr
->index
]));
3846 static const struct sysfs_ops cm_counter_ops
= {
3847 .show
= cm_show_counter
3850 static struct kobj_type cm_counter_obj_type
= {
3851 .sysfs_ops
= &cm_counter_ops
,
3852 .default_attrs
= cm_counter_default_attrs
3855 static void cm_release_port_obj(struct kobject
*obj
)
3857 struct cm_port
*cm_port
;
3859 cm_port
= container_of(obj
, struct cm_port
, port_obj
);
3863 static struct kobj_type cm_port_obj_type
= {
3864 .release
= cm_release_port_obj
3867 static char *cm_devnode(struct device
*dev
, umode_t
*mode
)
3871 return kasprintf(GFP_KERNEL
, "infiniband/%s", dev_name(dev
));
3874 struct class cm_class
= {
3875 .owner
= THIS_MODULE
,
3876 .name
= "infiniband_cm",
3877 .devnode
= cm_devnode
,
3879 EXPORT_SYMBOL(cm_class
);
3881 static int cm_create_port_fs(struct cm_port
*port
)
3885 ret
= kobject_init_and_add(&port
->port_obj
, &cm_port_obj_type
,
3886 &port
->cm_dev
->device
->kobj
,
3887 "%d", port
->port_num
);
3893 for (i
= 0; i
< CM_COUNTER_GROUPS
; i
++) {
3894 ret
= kobject_init_and_add(&port
->counter_group
[i
].obj
,
3895 &cm_counter_obj_type
,
3897 "%s", counter_group_names
[i
]);
3906 kobject_put(&port
->counter_group
[i
].obj
);
3907 kobject_put(&port
->port_obj
);
3912 static void cm_remove_port_fs(struct cm_port
*port
)
3916 for (i
= 0; i
< CM_COUNTER_GROUPS
; i
++)
3917 kobject_put(&port
->counter_group
[i
].obj
);
3919 kobject_put(&port
->port_obj
);
3922 static void cm_add_one(struct ib_device
*ib_device
)
3924 struct cm_device
*cm_dev
;
3925 struct cm_port
*port
;
3926 struct ib_mad_reg_req reg_req
= {
3927 .mgmt_class
= IB_MGMT_CLASS_CM
,
3928 .mgmt_class_version
= IB_CM_CLASS_VERSION
,
3930 struct ib_port_modify port_modify
= {
3931 .set_port_cap_mask
= IB_PORT_CM_SUP
3933 unsigned long flags
;
3938 cm_dev
= kzalloc(sizeof(*cm_dev
) + sizeof(*port
) *
3939 ib_device
->phys_port_cnt
, GFP_KERNEL
);
3943 cm_dev
->ib_device
= ib_device
;
3944 cm_dev
->ack_delay
= ib_device
->attrs
.local_ca_ack_delay
;
3945 cm_dev
->going_down
= 0;
3946 cm_dev
->device
= device_create(&cm_class
, &ib_device
->dev
,
3948 "%s", ib_device
->name
);
3949 if (IS_ERR(cm_dev
->device
)) {
3954 set_bit(IB_MGMT_METHOD_SEND
, reg_req
.method_mask
);
3955 for (i
= 1; i
<= ib_device
->phys_port_cnt
; i
++) {
3956 if (!rdma_cap_ib_cm(ib_device
, i
))
3959 port
= kzalloc(sizeof *port
, GFP_KERNEL
);
3963 cm_dev
->port
[i
-1] = port
;
3964 port
->cm_dev
= cm_dev
;
3967 INIT_LIST_HEAD(&port
->cm_priv_prim_list
);
3968 INIT_LIST_HEAD(&port
->cm_priv_altr_list
);
3970 ret
= cm_create_port_fs(port
);
3974 port
->mad_agent
= ib_register_mad_agent(ib_device
, i
,
3982 if (IS_ERR(port
->mad_agent
))
3985 ret
= ib_modify_port(ib_device
, i
, 0, &port_modify
);
3995 ib_set_client_data(ib_device
, &cm_client
, cm_dev
);
3997 write_lock_irqsave(&cm
.device_lock
, flags
);
3998 list_add_tail(&cm_dev
->list
, &cm
.device_list
);
3999 write_unlock_irqrestore(&cm
.device_lock
, flags
);
4003 ib_unregister_mad_agent(port
->mad_agent
);
4005 cm_remove_port_fs(port
);
4007 port_modify
.set_port_cap_mask
= 0;
4008 port_modify
.clr_port_cap_mask
= IB_PORT_CM_SUP
;
4010 if (!rdma_cap_ib_cm(ib_device
, i
))
4013 port
= cm_dev
->port
[i
-1];
4014 ib_modify_port(ib_device
, port
->port_num
, 0, &port_modify
);
4015 ib_unregister_mad_agent(port
->mad_agent
);
4016 cm_remove_port_fs(port
);
4019 device_unregister(cm_dev
->device
);
4023 static void cm_remove_one(struct ib_device
*ib_device
, void *client_data
)
4025 struct cm_device
*cm_dev
= client_data
;
4026 struct cm_port
*port
;
4027 struct cm_id_private
*cm_id_priv
;
4028 struct ib_mad_agent
*cur_mad_agent
;
4029 struct ib_port_modify port_modify
= {
4030 .clr_port_cap_mask
= IB_PORT_CM_SUP
4032 unsigned long flags
;
4038 write_lock_irqsave(&cm
.device_lock
, flags
);
4039 list_del(&cm_dev
->list
);
4040 write_unlock_irqrestore(&cm
.device_lock
, flags
);
4042 spin_lock_irq(&cm
.lock
);
4043 cm_dev
->going_down
= 1;
4044 spin_unlock_irq(&cm
.lock
);
4046 for (i
= 1; i
<= ib_device
->phys_port_cnt
; i
++) {
4047 if (!rdma_cap_ib_cm(ib_device
, i
))
4050 port
= cm_dev
->port
[i
-1];
4051 ib_modify_port(ib_device
, port
->port_num
, 0, &port_modify
);
4052 /* Mark all the cm_id's as not valid */
4053 spin_lock_irq(&cm
.lock
);
4054 list_for_each_entry(cm_id_priv
, &port
->cm_priv_altr_list
, altr_list
)
4055 cm_id_priv
->altr_send_port_not_ready
= 1;
4056 list_for_each_entry(cm_id_priv
, &port
->cm_priv_prim_list
, prim_list
)
4057 cm_id_priv
->prim_send_port_not_ready
= 1;
4058 spin_unlock_irq(&cm
.lock
);
4060 * We flush the queue here after the going_down set, this
4061 * verify that no new works will be queued in the recv handler,
4062 * after that we can call the unregister_mad_agent
4064 flush_workqueue(cm
.wq
);
4065 spin_lock_irq(&cm
.state_lock
);
4066 cur_mad_agent
= port
->mad_agent
;
4067 port
->mad_agent
= NULL
;
4068 spin_unlock_irq(&cm
.state_lock
);
4069 ib_unregister_mad_agent(cur_mad_agent
);
4070 cm_remove_port_fs(port
);
4073 device_unregister(cm_dev
->device
);
4077 static int __init
ib_cm_init(void)
4081 memset(&cm
, 0, sizeof cm
);
4082 INIT_LIST_HEAD(&cm
.device_list
);
4083 rwlock_init(&cm
.device_lock
);
4084 spin_lock_init(&cm
.lock
);
4085 spin_lock_init(&cm
.state_lock
);
4086 cm
.listen_service_table
= RB_ROOT
;
4087 cm
.listen_service_id
= be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID
);
4088 cm
.remote_id_table
= RB_ROOT
;
4089 cm
.remote_qp_table
= RB_ROOT
;
4090 cm
.remote_sidr_table
= RB_ROOT
;
4091 idr_init(&cm
.local_id_table
);
4092 get_random_bytes(&cm
.random_id_operand
, sizeof cm
.random_id_operand
);
4093 INIT_LIST_HEAD(&cm
.timewait_list
);
4095 ret
= class_register(&cm_class
);
4101 cm
.wq
= create_workqueue("ib_cm");
4107 ret
= ib_register_client(&cm_client
);
4113 destroy_workqueue(cm
.wq
);
4115 class_unregister(&cm_class
);
4117 idr_destroy(&cm
.local_id_table
);
4121 static void __exit
ib_cm_cleanup(void)
4123 struct cm_timewait_info
*timewait_info
, *tmp
;
4125 spin_lock_irq(&cm
.lock
);
4126 list_for_each_entry(timewait_info
, &cm
.timewait_list
, list
)
4127 cancel_delayed_work(&timewait_info
->work
.work
);
4128 spin_unlock_irq(&cm
.lock
);
4130 ib_unregister_client(&cm_client
);
4131 destroy_workqueue(cm
.wq
);
4133 list_for_each_entry_safe(timewait_info
, tmp
, &cm
.timewait_list
, list
) {
4134 list_del(&timewait_info
->list
);
4135 kfree(timewait_info
);
4138 class_unregister(&cm_class
);
4139 idr_destroy(&cm
.local_id_table
);
4142 module_init(ib_cm_init
);
4143 module_exit(ib_cm_cleanup
);