2 * Copyright (c) 2004-2006 Intel Corporation. All rights reserved.
3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $
38 #include <linux/completion.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/err.h>
41 #include <linux/idr.h>
42 #include <linux/interrupt.h>
43 #include <linux/pci.h>
44 #include <linux/random.h>
45 #include <linux/rbtree.h>
46 #include <linux/spinlock.h>
47 #include <linux/workqueue.h>
49 #include <rdma/ib_cache.h>
50 #include <rdma/ib_cm.h>
53 MODULE_AUTHOR("Sean Hefty");
54 MODULE_DESCRIPTION("InfiniBand CM");
55 MODULE_LICENSE("Dual BSD/GPL");
57 static void cm_add_one(struct ib_device *device);
58 static void cm_remove_one(struct ib_device *device);
60 static struct ib_client cm_client = {
63 .remove = cm_remove_one
68 struct list_head device_list;
70 struct rb_root listen_service_table;
71 u64 listen_service_id;
72 /* struct rb_root peer_service_table; todo: fix peer to peer */
73 struct rb_root remote_qp_table;
74 struct rb_root remote_id_table;
75 struct rb_root remote_sidr_table;
76 struct idr local_id_table;
77 __be32 random_id_operand;
78 struct list_head timewait_list;
79 struct workqueue_struct *wq;
83 struct cm_device *cm_dev;
84 struct ib_mad_agent *mad_agent;
89 struct list_head list;
90 struct ib_device *device;
92 struct cm_port port[0];
98 struct ib_ah_attr ah_attr;
104 struct delayed_work work;
105 struct list_head list;
106 struct cm_port *port;
107 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
108 __be32 local_id; /* Established / timewait */
110 struct ib_cm_event cm_event;
111 struct ib_sa_path_rec path[0];
114 struct cm_timewait_info {
115 struct cm_work work; /* Must be first. */
116 struct list_head list;
117 struct rb_node remote_qp_node;
118 struct rb_node remote_id_node;
119 __be64 remote_ca_guid;
121 u8 inserted_remote_qp;
122 u8 inserted_remote_id;
125 struct cm_id_private {
128 struct rb_node service_node;
129 struct rb_node sidr_id_node;
130 spinlock_t lock; /* Do not acquire inside cm.lock */
131 struct completion comp;
134 struct ib_mad_send_buf *msg;
135 struct cm_timewait_info *timewait_info;
136 /* todo: use alternate port on send failure */
139 struct ib_cm_compare_data *compare_data;
145 enum ib_qp_type qp_type;
149 enum ib_mtu path_mtu;
153 u8 responder_resources;
155 u8 local_ack_timeout;
160 struct list_head work_list;
164 static void cm_work_handler(struct work_struct *work);
166 static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
168 if (atomic_dec_and_test(&cm_id_priv->refcount))
169 complete(&cm_id_priv->comp);
172 static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
173 struct ib_mad_send_buf **msg)
175 struct ib_mad_agent *mad_agent;
176 struct ib_mad_send_buf *m;
179 mad_agent = cm_id_priv->av.port->mad_agent;
180 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
184 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
185 cm_id_priv->av.pkey_index,
186 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
193 /* Timeout set by caller if response is expected. */
195 m->retries = cm_id_priv->max_cm_retries;
197 atomic_inc(&cm_id_priv->refcount);
198 m->context[0] = cm_id_priv;
203 static int cm_alloc_response_msg(struct cm_port *port,
204 struct ib_mad_recv_wc *mad_recv_wc,
205 struct ib_mad_send_buf **msg)
207 struct ib_mad_send_buf *m;
210 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
211 mad_recv_wc->recv_buf.grh, port->port_num);
215 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
216 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
227 static void cm_free_msg(struct ib_mad_send_buf *msg)
229 ib_destroy_ah(msg->ah);
231 cm_deref_id(msg->context[0]);
232 ib_free_send_mad(msg);
235 static void * cm_copy_private_data(const void *private_data,
240 if (!private_data || !private_data_len)
243 data = kmalloc(private_data_len, GFP_KERNEL);
245 return ERR_PTR(-ENOMEM);
247 memcpy(data, private_data, private_data_len);
251 static void cm_set_private_data(struct cm_id_private *cm_id_priv,
252 void *private_data, u8 private_data_len)
254 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
255 kfree(cm_id_priv->private_data);
257 cm_id_priv->private_data = private_data;
258 cm_id_priv->private_data_len = private_data_len;
261 static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
262 struct ib_grh *grh, struct cm_av *av)
265 av->pkey_index = wc->pkey_index;
266 ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc,
270 static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
272 struct cm_device *cm_dev;
273 struct cm_port *port = NULL;
278 read_lock_irqsave(&cm.device_lock, flags);
279 list_for_each_entry(cm_dev, &cm.device_list, list) {
280 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
282 port = &cm_dev->port[p-1];
286 read_unlock_irqrestore(&cm.device_lock, flags);
291 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
292 be16_to_cpu(path->pkey), &av->pkey_index);
297 ib_init_ah_from_path(cm_dev->device, port->port_num, path,
299 av->packet_life_time = path->packet_life_time;
303 static int cm_alloc_id(struct cm_id_private *cm_id_priv)
310 spin_lock_irqsave(&cm.lock, flags);
311 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv,
313 spin_unlock_irqrestore(&cm.lock, flags);
314 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
316 cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand);
320 static void cm_free_id(__be32 local_id)
324 spin_lock_irqsave(&cm.lock, flags);
325 idr_remove(&cm.local_id_table,
326 (__force int) (local_id ^ cm.random_id_operand));
327 spin_unlock_irqrestore(&cm.lock, flags);
330 static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
332 struct cm_id_private *cm_id_priv;
334 cm_id_priv = idr_find(&cm.local_id_table,
335 (__force int) (local_id ^ cm.random_id_operand));
337 if (cm_id_priv->id.remote_id == remote_id)
338 atomic_inc(&cm_id_priv->refcount);
346 static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
348 struct cm_id_private *cm_id_priv;
351 spin_lock_irqsave(&cm.lock, flags);
352 cm_id_priv = cm_get_id(local_id, remote_id);
353 spin_unlock_irqrestore(&cm.lock, flags);
358 static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
362 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
363 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
364 ((unsigned long *) mask)[i];
367 static int cm_compare_data(struct ib_cm_compare_data *src_data,
368 struct ib_cm_compare_data *dst_data)
370 u8 src[IB_CM_COMPARE_SIZE];
371 u8 dst[IB_CM_COMPARE_SIZE];
373 if (!src_data || !dst_data)
376 cm_mask_copy(src, src_data->data, dst_data->mask);
377 cm_mask_copy(dst, dst_data->data, src_data->mask);
378 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
381 static int cm_compare_private_data(u8 *private_data,
382 struct ib_cm_compare_data *dst_data)
384 u8 src[IB_CM_COMPARE_SIZE];
389 cm_mask_copy(src, private_data, dst_data->mask);
390 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
393 static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
395 struct rb_node **link = &cm.listen_service_table.rb_node;
396 struct rb_node *parent = NULL;
397 struct cm_id_private *cur_cm_id_priv;
398 __be64 service_id = cm_id_priv->id.service_id;
399 __be64 service_mask = cm_id_priv->id.service_mask;
404 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
406 data_cmp = cm_compare_data(cm_id_priv->compare_data,
407 cur_cm_id_priv->compare_data);
408 if ((cur_cm_id_priv->id.service_mask & service_id) ==
409 (service_mask & cur_cm_id_priv->id.service_id) &&
410 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
412 return cur_cm_id_priv;
414 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
415 link = &(*link)->rb_left;
416 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
417 link = &(*link)->rb_right;
418 else if (service_id < cur_cm_id_priv->id.service_id)
419 link = &(*link)->rb_left;
420 else if (service_id > cur_cm_id_priv->id.service_id)
421 link = &(*link)->rb_right;
422 else if (data_cmp < 0)
423 link = &(*link)->rb_left;
425 link = &(*link)->rb_right;
427 rb_link_node(&cm_id_priv->service_node, parent, link);
428 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
432 static struct cm_id_private * cm_find_listen(struct ib_device *device,
436 struct rb_node *node = cm.listen_service_table.rb_node;
437 struct cm_id_private *cm_id_priv;
441 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
442 data_cmp = cm_compare_private_data(private_data,
443 cm_id_priv->compare_data);
444 if ((cm_id_priv->id.service_mask & service_id) ==
445 cm_id_priv->id.service_id &&
446 (cm_id_priv->id.device == device) && !data_cmp)
449 if (device < cm_id_priv->id.device)
450 node = node->rb_left;
451 else if (device > cm_id_priv->id.device)
452 node = node->rb_right;
453 else if (service_id < cm_id_priv->id.service_id)
454 node = node->rb_left;
455 else if (service_id > cm_id_priv->id.service_id)
456 node = node->rb_right;
457 else if (data_cmp < 0)
458 node = node->rb_left;
460 node = node->rb_right;
465 static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
468 struct rb_node **link = &cm.remote_id_table.rb_node;
469 struct rb_node *parent = NULL;
470 struct cm_timewait_info *cur_timewait_info;
471 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
472 __be32 remote_id = timewait_info->work.remote_id;
476 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
478 if (remote_id < cur_timewait_info->work.remote_id)
479 link = &(*link)->rb_left;
480 else if (remote_id > cur_timewait_info->work.remote_id)
481 link = &(*link)->rb_right;
482 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
483 link = &(*link)->rb_left;
484 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
485 link = &(*link)->rb_right;
487 return cur_timewait_info;
489 timewait_info->inserted_remote_id = 1;
490 rb_link_node(&timewait_info->remote_id_node, parent, link);
491 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
495 static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
498 struct rb_node *node = cm.remote_id_table.rb_node;
499 struct cm_timewait_info *timewait_info;
502 timewait_info = rb_entry(node, struct cm_timewait_info,
504 if (remote_id < timewait_info->work.remote_id)
505 node = node->rb_left;
506 else if (remote_id > timewait_info->work.remote_id)
507 node = node->rb_right;
508 else if (remote_ca_guid < timewait_info->remote_ca_guid)
509 node = node->rb_left;
510 else if (remote_ca_guid > timewait_info->remote_ca_guid)
511 node = node->rb_right;
513 return timewait_info;
518 static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
521 struct rb_node **link = &cm.remote_qp_table.rb_node;
522 struct rb_node *parent = NULL;
523 struct cm_timewait_info *cur_timewait_info;
524 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
525 __be32 remote_qpn = timewait_info->remote_qpn;
529 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
531 if (remote_qpn < cur_timewait_info->remote_qpn)
532 link = &(*link)->rb_left;
533 else if (remote_qpn > cur_timewait_info->remote_qpn)
534 link = &(*link)->rb_right;
535 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
536 link = &(*link)->rb_left;
537 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
538 link = &(*link)->rb_right;
540 return cur_timewait_info;
542 timewait_info->inserted_remote_qp = 1;
543 rb_link_node(&timewait_info->remote_qp_node, parent, link);
544 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
548 static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
551 struct rb_node **link = &cm.remote_sidr_table.rb_node;
552 struct rb_node *parent = NULL;
553 struct cm_id_private *cur_cm_id_priv;
554 union ib_gid *port_gid = &cm_id_priv->av.dgid;
555 __be32 remote_id = cm_id_priv->id.remote_id;
559 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
561 if (remote_id < cur_cm_id_priv->id.remote_id)
562 link = &(*link)->rb_left;
563 else if (remote_id > cur_cm_id_priv->id.remote_id)
564 link = &(*link)->rb_right;
567 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
570 link = &(*link)->rb_left;
572 link = &(*link)->rb_right;
574 return cur_cm_id_priv;
577 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
578 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
582 static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
583 enum ib_cm_sidr_status status)
585 struct ib_cm_sidr_rep_param param;
587 memset(¶m, 0, sizeof param);
588 param.status = status;
589 ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m);
592 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
593 ib_cm_handler cm_handler,
596 struct cm_id_private *cm_id_priv;
599 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
601 return ERR_PTR(-ENOMEM);
603 cm_id_priv->id.state = IB_CM_IDLE;
604 cm_id_priv->id.device = device;
605 cm_id_priv->id.cm_handler = cm_handler;
606 cm_id_priv->id.context = context;
607 cm_id_priv->id.remote_cm_qpn = 1;
608 ret = cm_alloc_id(cm_id_priv);
612 spin_lock_init(&cm_id_priv->lock);
613 init_completion(&cm_id_priv->comp);
614 INIT_LIST_HEAD(&cm_id_priv->work_list);
615 atomic_set(&cm_id_priv->work_count, -1);
616 atomic_set(&cm_id_priv->refcount, 1);
617 return &cm_id_priv->id;
621 return ERR_PTR(-ENOMEM);
623 EXPORT_SYMBOL(ib_create_cm_id);
625 static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
627 struct cm_work *work;
629 if (list_empty(&cm_id_priv->work_list))
632 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
633 list_del(&work->list);
637 static void cm_free_work(struct cm_work *work)
639 if (work->mad_recv_wc)
640 ib_free_recv_mad(work->mad_recv_wc);
644 static inline int cm_convert_to_ms(int iba_time)
646 /* approximate conversion to ms from 4.096us x 2^iba_time */
647 return 1 << max(iba_time - 8, 0);
650 static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
652 if (timewait_info->inserted_remote_id) {
653 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
654 timewait_info->inserted_remote_id = 0;
657 if (timewait_info->inserted_remote_qp) {
658 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
659 timewait_info->inserted_remote_qp = 0;
663 static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
665 struct cm_timewait_info *timewait_info;
667 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
669 return ERR_PTR(-ENOMEM);
671 timewait_info->work.local_id = local_id;
672 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
673 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
674 return timewait_info;
677 static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
682 spin_lock_irqsave(&cm.lock, flags);
683 cm_cleanup_timewait(cm_id_priv->timewait_info);
684 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
685 spin_unlock_irqrestore(&cm.lock, flags);
688 * The cm_id could be destroyed by the user before we exit timewait.
689 * To protect against this, we search for the cm_id after exiting
690 * timewait before notifying the user that we've exited timewait.
692 cm_id_priv->id.state = IB_CM_TIMEWAIT;
693 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
694 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
695 msecs_to_jiffies(wait_time));
696 cm_id_priv->timewait_info = NULL;
699 static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
703 cm_id_priv->id.state = IB_CM_IDLE;
704 if (cm_id_priv->timewait_info) {
705 spin_lock_irqsave(&cm.lock, flags);
706 cm_cleanup_timewait(cm_id_priv->timewait_info);
707 spin_unlock_irqrestore(&cm.lock, flags);
708 kfree(cm_id_priv->timewait_info);
709 cm_id_priv->timewait_info = NULL;
713 static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
715 struct cm_id_private *cm_id_priv;
716 struct cm_work *work;
719 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
721 spin_lock_irqsave(&cm_id_priv->lock, flags);
722 switch (cm_id->state) {
724 cm_id->state = IB_CM_IDLE;
725 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
726 spin_lock_irqsave(&cm.lock, flags);
727 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
728 spin_unlock_irqrestore(&cm.lock, flags);
730 case IB_CM_SIDR_REQ_SENT:
731 cm_id->state = IB_CM_IDLE;
732 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
733 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
735 case IB_CM_SIDR_REQ_RCVD:
736 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
737 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
740 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
741 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
742 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
743 &cm_id_priv->av.port->cm_dev->ca_guid,
744 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
748 if (err == -ENOMEM) {
749 /* Do not reject to allow future retries. */
750 cm_reset_to_idle(cm_id_priv);
751 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
753 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
754 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
758 case IB_CM_MRA_REQ_RCVD:
760 case IB_CM_MRA_REP_RCVD:
761 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
763 case IB_CM_MRA_REQ_SENT:
765 case IB_CM_MRA_REP_SENT:
766 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
767 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
770 case IB_CM_ESTABLISHED:
771 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
772 ib_send_cm_dreq(cm_id, NULL, 0);
774 case IB_CM_DREQ_SENT:
775 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
776 cm_enter_timewait(cm_id_priv);
777 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
779 case IB_CM_DREQ_RCVD:
780 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
781 ib_send_cm_drep(cm_id, NULL, 0);
784 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
788 cm_free_id(cm_id->local_id);
789 cm_deref_id(cm_id_priv);
790 wait_for_completion(&cm_id_priv->comp);
791 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
793 kfree(cm_id_priv->compare_data);
794 kfree(cm_id_priv->private_data);
798 void ib_destroy_cm_id(struct ib_cm_id *cm_id)
800 cm_destroy_id(cm_id, 0);
802 EXPORT_SYMBOL(ib_destroy_cm_id);
804 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
805 struct ib_cm_compare_data *compare_data)
807 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
811 service_mask = service_mask ? service_mask :
812 __constant_cpu_to_be64(~0ULL);
813 service_id &= service_mask;
814 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
815 (service_id != IB_CM_ASSIGN_SERVICE_ID))
818 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
819 if (cm_id->state != IB_CM_IDLE)
823 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
825 if (!cm_id_priv->compare_data)
827 cm_mask_copy(cm_id_priv->compare_data->data,
828 compare_data->data, compare_data->mask);
829 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
833 cm_id->state = IB_CM_LISTEN;
835 spin_lock_irqsave(&cm.lock, flags);
836 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
837 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
838 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
840 cm_id->service_id = service_id;
841 cm_id->service_mask = service_mask;
843 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
844 spin_unlock_irqrestore(&cm.lock, flags);
846 if (cur_cm_id_priv) {
847 cm_id->state = IB_CM_IDLE;
848 kfree(cm_id_priv->compare_data);
849 cm_id_priv->compare_data = NULL;
854 EXPORT_SYMBOL(ib_cm_listen);
856 static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
857 enum cm_msg_sequence msg_seq)
861 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
862 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
864 return cpu_to_be64(hi_tid | low_tid);
867 static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
868 __be16 attr_id, __be64 tid)
870 hdr->base_version = IB_MGMT_BASE_VERSION;
871 hdr->mgmt_class = IB_MGMT_CLASS_CM;
872 hdr->class_version = IB_CM_CLASS_VERSION;
873 hdr->method = IB_MGMT_METHOD_SEND;
874 hdr->attr_id = attr_id;
878 static void cm_format_req(struct cm_req_msg *req_msg,
879 struct cm_id_private *cm_id_priv,
880 struct ib_cm_req_param *param)
882 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
883 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
885 req_msg->local_comm_id = cm_id_priv->id.local_id;
886 req_msg->service_id = param->service_id;
887 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
888 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
889 cm_req_set_resp_res(req_msg, param->responder_resources);
890 cm_req_set_init_depth(req_msg, param->initiator_depth);
891 cm_req_set_remote_resp_timeout(req_msg,
892 param->remote_cm_response_timeout);
893 cm_req_set_qp_type(req_msg, param->qp_type);
894 cm_req_set_flow_ctrl(req_msg, param->flow_control);
895 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
896 cm_req_set_local_resp_timeout(req_msg,
897 param->local_cm_response_timeout);
898 cm_req_set_retry_count(req_msg, param->retry_count);
899 req_msg->pkey = param->primary_path->pkey;
900 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
901 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
902 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
903 cm_req_set_srq(req_msg, param->srq);
905 req_msg->primary_local_lid = param->primary_path->slid;
906 req_msg->primary_remote_lid = param->primary_path->dlid;
907 req_msg->primary_local_gid = param->primary_path->sgid;
908 req_msg->primary_remote_gid = param->primary_path->dgid;
909 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
910 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
911 req_msg->primary_traffic_class = param->primary_path->traffic_class;
912 req_msg->primary_hop_limit = param->primary_path->hop_limit;
913 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
914 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
915 cm_req_set_primary_local_ack_timeout(req_msg,
916 min(31, param->primary_path->packet_life_time + 1));
918 if (param->alternate_path) {
919 req_msg->alt_local_lid = param->alternate_path->slid;
920 req_msg->alt_remote_lid = param->alternate_path->dlid;
921 req_msg->alt_local_gid = param->alternate_path->sgid;
922 req_msg->alt_remote_gid = param->alternate_path->dgid;
923 cm_req_set_alt_flow_label(req_msg,
924 param->alternate_path->flow_label);
925 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
926 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
927 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
928 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
929 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
930 cm_req_set_alt_local_ack_timeout(req_msg,
931 min(31, param->alternate_path->packet_life_time + 1));
934 if (param->private_data && param->private_data_len)
935 memcpy(req_msg->private_data, param->private_data,
936 param->private_data_len);
939 static int cm_validate_req_param(struct ib_cm_req_param *param)
941 /* peer-to-peer not supported */
942 if (param->peer_to_peer)
945 if (!param->primary_path)
948 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
951 if (param->private_data &&
952 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
955 if (param->alternate_path &&
956 (param->alternate_path->pkey != param->primary_path->pkey ||
957 param->alternate_path->mtu != param->primary_path->mtu))
963 int ib_send_cm_req(struct ib_cm_id *cm_id,
964 struct ib_cm_req_param *param)
966 struct cm_id_private *cm_id_priv;
967 struct cm_req_msg *req_msg;
971 ret = cm_validate_req_param(param);
975 /* Verify that we're not in timewait. */
976 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
977 spin_lock_irqsave(&cm_id_priv->lock, flags);
978 if (cm_id->state != IB_CM_IDLE) {
979 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
983 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
985 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
987 if (IS_ERR(cm_id_priv->timewait_info)) {
988 ret = PTR_ERR(cm_id_priv->timewait_info);
992 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
995 if (param->alternate_path) {
996 ret = cm_init_av_by_path(param->alternate_path,
997 &cm_id_priv->alt_av);
1001 cm_id->service_id = param->service_id;
1002 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
1003 cm_id_priv->timeout_ms = cm_convert_to_ms(
1004 param->primary_path->packet_life_time) * 2 +
1006 param->remote_cm_response_timeout);
1007 cm_id_priv->max_cm_retries = param->max_cm_retries;
1008 cm_id_priv->initiator_depth = param->initiator_depth;
1009 cm_id_priv->responder_resources = param->responder_resources;
1010 cm_id_priv->retry_count = param->retry_count;
1011 cm_id_priv->path_mtu = param->primary_path->mtu;
1012 cm_id_priv->qp_type = param->qp_type;
1014 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1018 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1019 cm_format_req(req_msg, cm_id_priv, param);
1020 cm_id_priv->tid = req_msg->hdr.tid;
1021 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
1022 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1024 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1025 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
1026 cm_id_priv->local_ack_timeout =
1027 cm_req_get_primary_local_ack_timeout(req_msg);
1029 spin_lock_irqsave(&cm_id_priv->lock, flags);
1030 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
1032 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1035 BUG_ON(cm_id->state != IB_CM_IDLE);
1036 cm_id->state = IB_CM_REQ_SENT;
1037 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1040 error2: cm_free_msg(cm_id_priv->msg);
1041 error1: kfree(cm_id_priv->timewait_info);
1044 EXPORT_SYMBOL(ib_send_cm_req);
1046 static int cm_issue_rej(struct cm_port *port,
1047 struct ib_mad_recv_wc *mad_recv_wc,
1048 enum ib_cm_rej_reason reason,
1049 enum cm_msg_response msg_rejected,
1050 void *ari, u8 ari_length)
1052 struct ib_mad_send_buf *msg = NULL;
1053 struct cm_rej_msg *rej_msg, *rcv_msg;
1056 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1060 /* We just need common CM header information. Cast to any message. */
1061 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1062 rej_msg = (struct cm_rej_msg *) msg->mad;
1064 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1065 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1066 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1067 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
1068 rej_msg->reason = cpu_to_be16(reason);
1070 if (ari && ari_length) {
1071 cm_rej_set_reject_info_len(rej_msg, ari_length);
1072 memcpy(rej_msg->ari, ari, ari_length);
1075 ret = ib_post_send_mad(msg, NULL);
1082 static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1083 __be32 local_qpn, __be32 remote_qpn)
1085 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1086 ((local_ca_guid == remote_ca_guid) &&
1087 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1090 static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
1091 struct ib_sa_path_rec *primary_path,
1092 struct ib_sa_path_rec *alt_path)
1094 memset(primary_path, 0, sizeof *primary_path);
1095 primary_path->dgid = req_msg->primary_local_gid;
1096 primary_path->sgid = req_msg->primary_remote_gid;
1097 primary_path->dlid = req_msg->primary_local_lid;
1098 primary_path->slid = req_msg->primary_remote_lid;
1099 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1100 primary_path->hop_limit = req_msg->primary_hop_limit;
1101 primary_path->traffic_class = req_msg->primary_traffic_class;
1102 primary_path->reversible = 1;
1103 primary_path->pkey = req_msg->pkey;
1104 primary_path->sl = cm_req_get_primary_sl(req_msg);
1105 primary_path->mtu_selector = IB_SA_EQ;
1106 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1107 primary_path->rate_selector = IB_SA_EQ;
1108 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1109 primary_path->packet_life_time_selector = IB_SA_EQ;
1110 primary_path->packet_life_time =
1111 cm_req_get_primary_local_ack_timeout(req_msg);
1112 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1114 if (req_msg->alt_local_lid) {
1115 memset(alt_path, 0, sizeof *alt_path);
1116 alt_path->dgid = req_msg->alt_local_gid;
1117 alt_path->sgid = req_msg->alt_remote_gid;
1118 alt_path->dlid = req_msg->alt_local_lid;
1119 alt_path->slid = req_msg->alt_remote_lid;
1120 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1121 alt_path->hop_limit = req_msg->alt_hop_limit;
1122 alt_path->traffic_class = req_msg->alt_traffic_class;
1123 alt_path->reversible = 1;
1124 alt_path->pkey = req_msg->pkey;
1125 alt_path->sl = cm_req_get_alt_sl(req_msg);
1126 alt_path->mtu_selector = IB_SA_EQ;
1127 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1128 alt_path->rate_selector = IB_SA_EQ;
1129 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1130 alt_path->packet_life_time_selector = IB_SA_EQ;
1131 alt_path->packet_life_time =
1132 cm_req_get_alt_local_ack_timeout(req_msg);
1133 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1137 static void cm_format_req_event(struct cm_work *work,
1138 struct cm_id_private *cm_id_priv,
1139 struct ib_cm_id *listen_id)
1141 struct cm_req_msg *req_msg;
1142 struct ib_cm_req_event_param *param;
1144 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1145 param = &work->cm_event.param.req_rcvd;
1146 param->listen_id = listen_id;
1147 param->port = cm_id_priv->av.port->port_num;
1148 param->primary_path = &work->path[0];
1149 if (req_msg->alt_local_lid)
1150 param->alternate_path = &work->path[1];
1152 param->alternate_path = NULL;
1153 param->remote_ca_guid = req_msg->local_ca_guid;
1154 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1155 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1156 param->qp_type = cm_req_get_qp_type(req_msg);
1157 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1158 param->responder_resources = cm_req_get_init_depth(req_msg);
1159 param->initiator_depth = cm_req_get_resp_res(req_msg);
1160 param->local_cm_response_timeout =
1161 cm_req_get_remote_resp_timeout(req_msg);
1162 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1163 param->remote_cm_response_timeout =
1164 cm_req_get_local_resp_timeout(req_msg);
1165 param->retry_count = cm_req_get_retry_count(req_msg);
1166 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1167 param->srq = cm_req_get_srq(req_msg);
1168 work->cm_event.private_data = &req_msg->private_data;
1171 static void cm_process_work(struct cm_id_private *cm_id_priv,
1172 struct cm_work *work)
1174 unsigned long flags;
1177 /* We will typically only have the current event to report. */
1178 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1181 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1182 spin_lock_irqsave(&cm_id_priv->lock, flags);
1183 work = cm_dequeue_work(cm_id_priv);
1184 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1186 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1190 cm_deref_id(cm_id_priv);
1192 cm_destroy_id(&cm_id_priv->id, ret);
1195 static void cm_format_mra(struct cm_mra_msg *mra_msg,
1196 struct cm_id_private *cm_id_priv,
1197 enum cm_msg_response msg_mraed, u8 service_timeout,
1198 const void *private_data, u8 private_data_len)
1200 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1201 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1202 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1203 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1204 cm_mra_set_service_timeout(mra_msg, service_timeout);
1206 if (private_data && private_data_len)
1207 memcpy(mra_msg->private_data, private_data, private_data_len);
1210 static void cm_format_rej(struct cm_rej_msg *rej_msg,
1211 struct cm_id_private *cm_id_priv,
1212 enum ib_cm_rej_reason reason,
1215 const void *private_data,
1216 u8 private_data_len)
1218 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1219 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1221 switch(cm_id_priv->id.state) {
1222 case IB_CM_REQ_RCVD:
1223 rej_msg->local_comm_id = 0;
1224 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1226 case IB_CM_MRA_REQ_SENT:
1227 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1228 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1230 case IB_CM_REP_RCVD:
1231 case IB_CM_MRA_REP_SENT:
1232 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1233 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1236 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1237 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1241 rej_msg->reason = cpu_to_be16(reason);
1242 if (ari && ari_length) {
1243 cm_rej_set_reject_info_len(rej_msg, ari_length);
1244 memcpy(rej_msg->ari, ari, ari_length);
1247 if (private_data && private_data_len)
1248 memcpy(rej_msg->private_data, private_data, private_data_len);
1251 static void cm_dup_req_handler(struct cm_work *work,
1252 struct cm_id_private *cm_id_priv)
1254 struct ib_mad_send_buf *msg = NULL;
1255 unsigned long flags;
1258 /* Quick state check to discard duplicate REQs. */
1259 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1262 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1266 spin_lock_irqsave(&cm_id_priv->lock, flags);
1267 switch (cm_id_priv->id.state) {
1268 case IB_CM_MRA_REQ_SENT:
1269 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1270 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1271 cm_id_priv->private_data,
1272 cm_id_priv->private_data_len);
1274 case IB_CM_TIMEWAIT:
1275 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1276 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1281 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1283 ret = ib_post_send_mad(msg, NULL);
1288 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1289 free: cm_free_msg(msg);
1292 static struct cm_id_private * cm_match_req(struct cm_work *work,
1293 struct cm_id_private *cm_id_priv)
1295 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1296 struct cm_timewait_info *timewait_info;
1297 struct cm_req_msg *req_msg;
1298 unsigned long flags;
1300 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1302 /* Check for duplicate REQ and stale connections. */
1303 spin_lock_irqsave(&cm.lock, flags);
1304 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1306 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1308 if (timewait_info) {
1309 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1310 timewait_info->work.remote_id);
1311 cm_cleanup_timewait(cm_id_priv->timewait_info);
1312 spin_unlock_irqrestore(&cm.lock, flags);
1313 if (cur_cm_id_priv) {
1314 cm_dup_req_handler(work, cur_cm_id_priv);
1315 cm_deref_id(cur_cm_id_priv);
1317 cm_issue_rej(work->port, work->mad_recv_wc,
1318 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1320 listen_cm_id_priv = NULL;
1324 /* Find matching listen request. */
1325 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
1326 req_msg->service_id,
1327 req_msg->private_data);
1328 if (!listen_cm_id_priv) {
1329 cm_cleanup_timewait(cm_id_priv->timewait_info);
1330 spin_unlock_irqrestore(&cm.lock, flags);
1331 cm_issue_rej(work->port, work->mad_recv_wc,
1332 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1336 atomic_inc(&listen_cm_id_priv->refcount);
1337 atomic_inc(&cm_id_priv->refcount);
1338 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1339 atomic_inc(&cm_id_priv->work_count);
1340 spin_unlock_irqrestore(&cm.lock, flags);
1342 return listen_cm_id_priv;
1345 static int cm_req_handler(struct cm_work *work)
1347 struct ib_cm_id *cm_id;
1348 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1349 struct cm_req_msg *req_msg;
1352 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1354 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
1356 return PTR_ERR(cm_id);
1358 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1359 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1360 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
1361 work->mad_recv_wc->recv_buf.grh,
1363 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1365 if (IS_ERR(cm_id_priv->timewait_info)) {
1366 ret = PTR_ERR(cm_id_priv->timewait_info);
1369 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1370 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1371 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1373 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1374 if (!listen_cm_id_priv) {
1376 kfree(cm_id_priv->timewait_info);
1380 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1381 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1382 cm_id_priv->id.service_id = req_msg->service_id;
1383 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
1385 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1386 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1388 ib_get_cached_gid(work->port->cm_dev->device,
1389 work->port->port_num, 0, &work->path[0].sgid);
1390 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1391 &work->path[0].sgid, sizeof work->path[0].sgid,
1395 if (req_msg->alt_local_lid) {
1396 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1398 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1399 &work->path[0].sgid,
1400 sizeof work->path[0].sgid, NULL, 0);
1404 cm_id_priv->tid = req_msg->hdr.tid;
1405 cm_id_priv->timeout_ms = cm_convert_to_ms(
1406 cm_req_get_local_resp_timeout(req_msg));
1407 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1408 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1409 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1410 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1411 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1412 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1413 cm_id_priv->local_ack_timeout =
1414 cm_req_get_primary_local_ack_timeout(req_msg);
1415 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1416 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1417 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
1419 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1420 cm_process_work(cm_id_priv, work);
1421 cm_deref_id(listen_cm_id_priv);
1425 atomic_dec(&cm_id_priv->refcount);
1426 cm_deref_id(listen_cm_id_priv);
1428 ib_destroy_cm_id(cm_id);
1432 static void cm_format_rep(struct cm_rep_msg *rep_msg,
1433 struct cm_id_private *cm_id_priv,
1434 struct ib_cm_rep_param *param)
1436 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1437 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1438 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1439 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1440 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1441 rep_msg->resp_resources = param->responder_resources;
1442 rep_msg->initiator_depth = param->initiator_depth;
1443 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1444 cm_rep_set_failover(rep_msg, param->failover_accepted);
1445 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1446 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1447 cm_rep_set_srq(rep_msg, param->srq);
1448 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1450 if (param->private_data && param->private_data_len)
1451 memcpy(rep_msg->private_data, param->private_data,
1452 param->private_data_len);
1455 int ib_send_cm_rep(struct ib_cm_id *cm_id,
1456 struct ib_cm_rep_param *param)
1458 struct cm_id_private *cm_id_priv;
1459 struct ib_mad_send_buf *msg;
1460 struct cm_rep_msg *rep_msg;
1461 unsigned long flags;
1464 if (param->private_data &&
1465 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1468 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1469 spin_lock_irqsave(&cm_id_priv->lock, flags);
1470 if (cm_id->state != IB_CM_REQ_RCVD &&
1471 cm_id->state != IB_CM_MRA_REQ_SENT) {
1476 ret = cm_alloc_msg(cm_id_priv, &msg);
1480 rep_msg = (struct cm_rep_msg *) msg->mad;
1481 cm_format_rep(rep_msg, cm_id_priv, param);
1482 msg->timeout_ms = cm_id_priv->timeout_ms;
1483 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1485 ret = ib_post_send_mad(msg, NULL);
1487 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1492 cm_id->state = IB_CM_REP_SENT;
1493 cm_id_priv->msg = msg;
1494 cm_id_priv->initiator_depth = param->initiator_depth;
1495 cm_id_priv->responder_resources = param->responder_resources;
1496 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1497 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1499 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1502 EXPORT_SYMBOL(ib_send_cm_rep);
1504 static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1505 struct cm_id_private *cm_id_priv,
1506 const void *private_data,
1507 u8 private_data_len)
1509 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1510 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1511 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1513 if (private_data && private_data_len)
1514 memcpy(rtu_msg->private_data, private_data, private_data_len);
1517 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1518 const void *private_data,
1519 u8 private_data_len)
1521 struct cm_id_private *cm_id_priv;
1522 struct ib_mad_send_buf *msg;
1523 unsigned long flags;
1527 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1530 data = cm_copy_private_data(private_data, private_data_len);
1532 return PTR_ERR(data);
1534 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1535 spin_lock_irqsave(&cm_id_priv->lock, flags);
1536 if (cm_id->state != IB_CM_REP_RCVD &&
1537 cm_id->state != IB_CM_MRA_REP_SENT) {
1542 ret = cm_alloc_msg(cm_id_priv, &msg);
1546 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1547 private_data, private_data_len);
1549 ret = ib_post_send_mad(msg, NULL);
1551 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1557 cm_id->state = IB_CM_ESTABLISHED;
1558 cm_set_private_data(cm_id_priv, data, private_data_len);
1559 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1562 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1566 EXPORT_SYMBOL(ib_send_cm_rtu);
1568 static void cm_format_rep_event(struct cm_work *work)
1570 struct cm_rep_msg *rep_msg;
1571 struct ib_cm_rep_event_param *param;
1573 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1574 param = &work->cm_event.param.rep_rcvd;
1575 param->remote_ca_guid = rep_msg->local_ca_guid;
1576 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1577 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1578 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1579 param->responder_resources = rep_msg->initiator_depth;
1580 param->initiator_depth = rep_msg->resp_resources;
1581 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1582 param->failover_accepted = cm_rep_get_failover(rep_msg);
1583 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1584 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1585 param->srq = cm_rep_get_srq(rep_msg);
1586 work->cm_event.private_data = &rep_msg->private_data;
1589 static void cm_dup_rep_handler(struct cm_work *work)
1591 struct cm_id_private *cm_id_priv;
1592 struct cm_rep_msg *rep_msg;
1593 struct ib_mad_send_buf *msg = NULL;
1594 unsigned long flags;
1597 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1598 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1599 rep_msg->local_comm_id);
1603 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1607 spin_lock_irqsave(&cm_id_priv->lock, flags);
1608 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1609 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1610 cm_id_priv->private_data,
1611 cm_id_priv->private_data_len);
1612 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1613 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1614 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1615 cm_id_priv->private_data,
1616 cm_id_priv->private_data_len);
1619 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1621 ret = ib_post_send_mad(msg, NULL);
1626 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1627 free: cm_free_msg(msg);
1628 deref: cm_deref_id(cm_id_priv);
1631 static int cm_rep_handler(struct cm_work *work)
1633 struct cm_id_private *cm_id_priv;
1634 struct cm_rep_msg *rep_msg;
1635 unsigned long flags;
1638 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1639 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1641 cm_dup_rep_handler(work);
1645 cm_format_rep_event(work);
1647 spin_lock_irqsave(&cm_id_priv->lock, flags);
1648 switch (cm_id_priv->id.state) {
1649 case IB_CM_REQ_SENT:
1650 case IB_CM_MRA_REQ_RCVD:
1653 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1658 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1659 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1660 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1662 spin_lock(&cm.lock);
1663 /* Check for duplicate REP. */
1664 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
1665 spin_unlock(&cm.lock);
1666 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1670 /* Check for a stale connection. */
1671 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
1672 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1673 &cm.remote_id_table);
1674 cm_id_priv->timewait_info->inserted_remote_id = 0;
1675 spin_unlock(&cm.lock);
1676 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1677 cm_issue_rej(work->port, work->mad_recv_wc,
1678 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1683 spin_unlock(&cm.lock);
1685 cm_id_priv->id.state = IB_CM_REP_RCVD;
1686 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1687 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1688 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1689 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1690 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1691 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1693 /* todo: handle peer_to_peer */
1695 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1696 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1698 list_add_tail(&work->list, &cm_id_priv->work_list);
1699 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1702 cm_process_work(cm_id_priv, work);
1704 cm_deref_id(cm_id_priv);
1708 cm_deref_id(cm_id_priv);
1712 static int cm_establish_handler(struct cm_work *work)
1714 struct cm_id_private *cm_id_priv;
1715 unsigned long flags;
1718 /* See comment in ib_cm_establish about lookup. */
1719 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1723 spin_lock_irqsave(&cm_id_priv->lock, flags);
1724 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1725 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1729 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1730 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1732 list_add_tail(&work->list, &cm_id_priv->work_list);
1733 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1736 cm_process_work(cm_id_priv, work);
1738 cm_deref_id(cm_id_priv);
1741 cm_deref_id(cm_id_priv);
1745 static int cm_rtu_handler(struct cm_work *work)
1747 struct cm_id_private *cm_id_priv;
1748 struct cm_rtu_msg *rtu_msg;
1749 unsigned long flags;
1752 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1753 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1754 rtu_msg->local_comm_id);
1758 work->cm_event.private_data = &rtu_msg->private_data;
1760 spin_lock_irqsave(&cm_id_priv->lock, flags);
1761 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1762 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1763 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1766 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1768 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1769 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1771 list_add_tail(&work->list, &cm_id_priv->work_list);
1772 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1775 cm_process_work(cm_id_priv, work);
1777 cm_deref_id(cm_id_priv);
1780 cm_deref_id(cm_id_priv);
1784 static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1785 struct cm_id_private *cm_id_priv,
1786 const void *private_data,
1787 u8 private_data_len)
1789 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1790 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1791 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1792 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1793 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1795 if (private_data && private_data_len)
1796 memcpy(dreq_msg->private_data, private_data, private_data_len);
1799 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1800 const void *private_data,
1801 u8 private_data_len)
1803 struct cm_id_private *cm_id_priv;
1804 struct ib_mad_send_buf *msg;
1805 unsigned long flags;
1808 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1811 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1812 spin_lock_irqsave(&cm_id_priv->lock, flags);
1813 if (cm_id->state != IB_CM_ESTABLISHED) {
1818 ret = cm_alloc_msg(cm_id_priv, &msg);
1820 cm_enter_timewait(cm_id_priv);
1824 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1825 private_data, private_data_len);
1826 msg->timeout_ms = cm_id_priv->timeout_ms;
1827 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1829 ret = ib_post_send_mad(msg, NULL);
1831 cm_enter_timewait(cm_id_priv);
1832 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1837 cm_id->state = IB_CM_DREQ_SENT;
1838 cm_id_priv->msg = msg;
1839 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1842 EXPORT_SYMBOL(ib_send_cm_dreq);
1844 static void cm_format_drep(struct cm_drep_msg *drep_msg,
1845 struct cm_id_private *cm_id_priv,
1846 const void *private_data,
1847 u8 private_data_len)
1849 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1850 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1851 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1853 if (private_data && private_data_len)
1854 memcpy(drep_msg->private_data, private_data, private_data_len);
1857 int ib_send_cm_drep(struct ib_cm_id *cm_id,
1858 const void *private_data,
1859 u8 private_data_len)
1861 struct cm_id_private *cm_id_priv;
1862 struct ib_mad_send_buf *msg;
1863 unsigned long flags;
1867 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1870 data = cm_copy_private_data(private_data, private_data_len);
1872 return PTR_ERR(data);
1874 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1875 spin_lock_irqsave(&cm_id_priv->lock, flags);
1876 if (cm_id->state != IB_CM_DREQ_RCVD) {
1877 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1882 cm_set_private_data(cm_id_priv, data, private_data_len);
1883 cm_enter_timewait(cm_id_priv);
1885 ret = cm_alloc_msg(cm_id_priv, &msg);
1889 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1890 private_data, private_data_len);
1892 ret = ib_post_send_mad(msg, NULL);
1894 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1899 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1902 EXPORT_SYMBOL(ib_send_cm_drep);
1904 static int cm_issue_drep(struct cm_port *port,
1905 struct ib_mad_recv_wc *mad_recv_wc)
1907 struct ib_mad_send_buf *msg = NULL;
1908 struct cm_dreq_msg *dreq_msg;
1909 struct cm_drep_msg *drep_msg;
1912 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1916 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
1917 drep_msg = (struct cm_drep_msg *) msg->mad;
1919 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
1920 drep_msg->remote_comm_id = dreq_msg->local_comm_id;
1921 drep_msg->local_comm_id = dreq_msg->remote_comm_id;
1923 ret = ib_post_send_mad(msg, NULL);
1930 static int cm_dreq_handler(struct cm_work *work)
1932 struct cm_id_private *cm_id_priv;
1933 struct cm_dreq_msg *dreq_msg;
1934 struct ib_mad_send_buf *msg = NULL;
1935 unsigned long flags;
1938 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1939 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1940 dreq_msg->local_comm_id);
1942 cm_issue_drep(work->port, work->mad_recv_wc);
1946 work->cm_event.private_data = &dreq_msg->private_data;
1948 spin_lock_irqsave(&cm_id_priv->lock, flags);
1949 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1952 switch (cm_id_priv->id.state) {
1953 case IB_CM_REP_SENT:
1954 case IB_CM_DREQ_SENT:
1955 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1957 case IB_CM_ESTABLISHED:
1958 case IB_CM_MRA_REP_RCVD:
1960 case IB_CM_TIMEWAIT:
1961 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1964 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1965 cm_id_priv->private_data,
1966 cm_id_priv->private_data_len);
1967 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1969 if (ib_post_send_mad(msg, NULL))
1975 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1976 cm_id_priv->tid = dreq_msg->hdr.tid;
1977 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1979 list_add_tail(&work->list, &cm_id_priv->work_list);
1980 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1983 cm_process_work(cm_id_priv, work);
1985 cm_deref_id(cm_id_priv);
1988 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1989 deref: cm_deref_id(cm_id_priv);
1993 static int cm_drep_handler(struct cm_work *work)
1995 struct cm_id_private *cm_id_priv;
1996 struct cm_drep_msg *drep_msg;
1997 unsigned long flags;
2000 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
2001 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
2002 drep_msg->local_comm_id);
2006 work->cm_event.private_data = &drep_msg->private_data;
2008 spin_lock_irqsave(&cm_id_priv->lock, flags);
2009 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2010 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
2011 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2014 cm_enter_timewait(cm_id_priv);
2016 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2017 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2019 list_add_tail(&work->list, &cm_id_priv->work_list);
2020 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2023 cm_process_work(cm_id_priv, work);
2025 cm_deref_id(cm_id_priv);
2028 cm_deref_id(cm_id_priv);
2032 int ib_send_cm_rej(struct ib_cm_id *cm_id,
2033 enum ib_cm_rej_reason reason,
2036 const void *private_data,
2037 u8 private_data_len)
2039 struct cm_id_private *cm_id_priv;
2040 struct ib_mad_send_buf *msg;
2041 unsigned long flags;
2044 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2045 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2048 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2050 spin_lock_irqsave(&cm_id_priv->lock, flags);
2051 switch (cm_id->state) {
2052 case IB_CM_REQ_SENT:
2053 case IB_CM_MRA_REQ_RCVD:
2054 case IB_CM_REQ_RCVD:
2055 case IB_CM_MRA_REQ_SENT:
2056 case IB_CM_REP_RCVD:
2057 case IB_CM_MRA_REP_SENT:
2058 ret = cm_alloc_msg(cm_id_priv, &msg);
2060 cm_format_rej((struct cm_rej_msg *) msg->mad,
2061 cm_id_priv, reason, ari, ari_length,
2062 private_data, private_data_len);
2064 cm_reset_to_idle(cm_id_priv);
2066 case IB_CM_REP_SENT:
2067 case IB_CM_MRA_REP_RCVD:
2068 ret = cm_alloc_msg(cm_id_priv, &msg);
2070 cm_format_rej((struct cm_rej_msg *) msg->mad,
2071 cm_id_priv, reason, ari, ari_length,
2072 private_data, private_data_len);
2074 cm_enter_timewait(cm_id_priv);
2084 ret = ib_post_send_mad(msg, NULL);
2088 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2091 EXPORT_SYMBOL(ib_send_cm_rej);
2093 static void cm_format_rej_event(struct cm_work *work)
2095 struct cm_rej_msg *rej_msg;
2096 struct ib_cm_rej_event_param *param;
2098 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2099 param = &work->cm_event.param.rej_rcvd;
2100 param->ari = rej_msg->ari;
2101 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
2102 param->reason = __be16_to_cpu(rej_msg->reason);
2103 work->cm_event.private_data = &rej_msg->private_data;
2106 static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2108 struct cm_timewait_info *timewait_info;
2109 struct cm_id_private *cm_id_priv;
2110 unsigned long flags;
2113 remote_id = rej_msg->local_comm_id;
2115 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
2116 spin_lock_irqsave(&cm.lock, flags);
2117 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
2119 if (!timewait_info) {
2120 spin_unlock_irqrestore(&cm.lock, flags);
2123 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2124 (timewait_info->work.local_id ^
2125 cm.random_id_operand));
2127 if (cm_id_priv->id.remote_id == remote_id)
2128 atomic_inc(&cm_id_priv->refcount);
2132 spin_unlock_irqrestore(&cm.lock, flags);
2133 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2134 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2136 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2141 static int cm_rej_handler(struct cm_work *work)
2143 struct cm_id_private *cm_id_priv;
2144 struct cm_rej_msg *rej_msg;
2145 unsigned long flags;
2148 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2149 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2153 cm_format_rej_event(work);
2155 spin_lock_irqsave(&cm_id_priv->lock, flags);
2156 switch (cm_id_priv->id.state) {
2157 case IB_CM_REQ_SENT:
2158 case IB_CM_MRA_REQ_RCVD:
2159 case IB_CM_REP_SENT:
2160 case IB_CM_MRA_REP_RCVD:
2161 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2163 case IB_CM_REQ_RCVD:
2164 case IB_CM_MRA_REQ_SENT:
2165 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
2166 cm_enter_timewait(cm_id_priv);
2168 cm_reset_to_idle(cm_id_priv);
2170 case IB_CM_DREQ_SENT:
2171 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2173 case IB_CM_REP_RCVD:
2174 case IB_CM_MRA_REP_SENT:
2175 case IB_CM_ESTABLISHED:
2176 cm_enter_timewait(cm_id_priv);
2179 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2184 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2186 list_add_tail(&work->list, &cm_id_priv->work_list);
2187 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2190 cm_process_work(cm_id_priv, work);
2192 cm_deref_id(cm_id_priv);
2195 cm_deref_id(cm_id_priv);
2199 int ib_send_cm_mra(struct ib_cm_id *cm_id,
2201 const void *private_data,
2202 u8 private_data_len)
2204 struct cm_id_private *cm_id_priv;
2205 struct ib_mad_send_buf *msg;
2207 unsigned long flags;
2210 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2213 data = cm_copy_private_data(private_data, private_data_len);
2215 return PTR_ERR(data);
2217 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2219 spin_lock_irqsave(&cm_id_priv->lock, flags);
2220 switch(cm_id_priv->id.state) {
2221 case IB_CM_REQ_RCVD:
2222 ret = cm_alloc_msg(cm_id_priv, &msg);
2226 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2227 CM_MSG_RESPONSE_REQ, service_timeout,
2228 private_data, private_data_len);
2229 ret = ib_post_send_mad(msg, NULL);
2232 cm_id->state = IB_CM_MRA_REQ_SENT;
2234 case IB_CM_REP_RCVD:
2235 ret = cm_alloc_msg(cm_id_priv, &msg);
2239 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2240 CM_MSG_RESPONSE_REP, service_timeout,
2241 private_data, private_data_len);
2242 ret = ib_post_send_mad(msg, NULL);
2245 cm_id->state = IB_CM_MRA_REP_SENT;
2247 case IB_CM_ESTABLISHED:
2248 ret = cm_alloc_msg(cm_id_priv, &msg);
2252 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2253 CM_MSG_RESPONSE_OTHER, service_timeout,
2254 private_data, private_data_len);
2255 ret = ib_post_send_mad(msg, NULL);
2258 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2264 cm_id_priv->service_timeout = service_timeout;
2265 cm_set_private_data(cm_id_priv, data, private_data_len);
2266 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2269 error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2273 error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2278 EXPORT_SYMBOL(ib_send_cm_mra);
2280 static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2282 switch (cm_mra_get_msg_mraed(mra_msg)) {
2283 case CM_MSG_RESPONSE_REQ:
2284 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2285 case CM_MSG_RESPONSE_REP:
2286 case CM_MSG_RESPONSE_OTHER:
2287 return cm_acquire_id(mra_msg->remote_comm_id,
2288 mra_msg->local_comm_id);
2294 static int cm_mra_handler(struct cm_work *work)
2296 struct cm_id_private *cm_id_priv;
2297 struct cm_mra_msg *mra_msg;
2298 unsigned long flags;
2301 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2302 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2306 work->cm_event.private_data = &mra_msg->private_data;
2307 work->cm_event.param.mra_rcvd.service_timeout =
2308 cm_mra_get_service_timeout(mra_msg);
2309 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2310 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2312 spin_lock_irqsave(&cm_id_priv->lock, flags);
2313 switch (cm_id_priv->id.state) {
2314 case IB_CM_REQ_SENT:
2315 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2316 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2317 cm_id_priv->msg, timeout))
2319 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2321 case IB_CM_REP_SENT:
2322 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2323 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2324 cm_id_priv->msg, timeout))
2326 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2328 case IB_CM_ESTABLISHED:
2329 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2330 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2331 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2332 cm_id_priv->msg, timeout))
2334 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2340 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2341 cm_id_priv->id.state;
2342 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2344 list_add_tail(&work->list, &cm_id_priv->work_list);
2345 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2348 cm_process_work(cm_id_priv, work);
2350 cm_deref_id(cm_id_priv);
2353 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2354 cm_deref_id(cm_id_priv);
2358 static void cm_format_lap(struct cm_lap_msg *lap_msg,
2359 struct cm_id_private *cm_id_priv,
2360 struct ib_sa_path_rec *alternate_path,
2361 const void *private_data,
2362 u8 private_data_len)
2364 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2365 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2366 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2367 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2368 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2369 /* todo: need remote CM response timeout */
2370 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2371 lap_msg->alt_local_lid = alternate_path->slid;
2372 lap_msg->alt_remote_lid = alternate_path->dlid;
2373 lap_msg->alt_local_gid = alternate_path->sgid;
2374 lap_msg->alt_remote_gid = alternate_path->dgid;
2375 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2376 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2377 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2378 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2379 cm_lap_set_sl(lap_msg, alternate_path->sl);
2380 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2381 cm_lap_set_local_ack_timeout(lap_msg,
2382 min(31, alternate_path->packet_life_time + 1));
2384 if (private_data && private_data_len)
2385 memcpy(lap_msg->private_data, private_data, private_data_len);
2388 int ib_send_cm_lap(struct ib_cm_id *cm_id,
2389 struct ib_sa_path_rec *alternate_path,
2390 const void *private_data,
2391 u8 private_data_len)
2393 struct cm_id_private *cm_id_priv;
2394 struct ib_mad_send_buf *msg;
2395 unsigned long flags;
2398 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2401 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2402 spin_lock_irqsave(&cm_id_priv->lock, flags);
2403 if (cm_id->state != IB_CM_ESTABLISHED ||
2404 cm_id->lap_state != IB_CM_LAP_IDLE) {
2409 ret = cm_alloc_msg(cm_id_priv, &msg);
2413 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2414 alternate_path, private_data, private_data_len);
2415 msg->timeout_ms = cm_id_priv->timeout_ms;
2416 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2418 ret = ib_post_send_mad(msg, NULL);
2420 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2425 cm_id->lap_state = IB_CM_LAP_SENT;
2426 cm_id_priv->msg = msg;
2428 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2431 EXPORT_SYMBOL(ib_send_cm_lap);
2433 static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2434 struct cm_lap_msg *lap_msg)
2436 memset(path, 0, sizeof *path);
2437 path->dgid = lap_msg->alt_local_gid;
2438 path->sgid = lap_msg->alt_remote_gid;
2439 path->dlid = lap_msg->alt_local_lid;
2440 path->slid = lap_msg->alt_remote_lid;
2441 path->flow_label = cm_lap_get_flow_label(lap_msg);
2442 path->hop_limit = lap_msg->alt_hop_limit;
2443 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2444 path->reversible = 1;
2445 /* pkey is same as in REQ */
2446 path->sl = cm_lap_get_sl(lap_msg);
2447 path->mtu_selector = IB_SA_EQ;
2448 /* mtu is same as in REQ */
2449 path->rate_selector = IB_SA_EQ;
2450 path->rate = cm_lap_get_packet_rate(lap_msg);
2451 path->packet_life_time_selector = IB_SA_EQ;
2452 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2453 path->packet_life_time -= (path->packet_life_time > 0);
2456 static int cm_lap_handler(struct cm_work *work)
2458 struct cm_id_private *cm_id_priv;
2459 struct cm_lap_msg *lap_msg;
2460 struct ib_cm_lap_event_param *param;
2461 struct ib_mad_send_buf *msg = NULL;
2462 unsigned long flags;
2465 /* todo: verify LAP request and send reject APR if invalid. */
2466 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2467 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2468 lap_msg->local_comm_id);
2472 param = &work->cm_event.param.lap_rcvd;
2473 param->alternate_path = &work->path[0];
2474 cm_format_path_from_lap(param->alternate_path, lap_msg);
2475 work->cm_event.private_data = &lap_msg->private_data;
2477 spin_lock_irqsave(&cm_id_priv->lock, flags);
2478 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2481 switch (cm_id_priv->id.lap_state) {
2482 case IB_CM_LAP_IDLE:
2484 case IB_CM_MRA_LAP_SENT:
2485 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2488 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2489 CM_MSG_RESPONSE_OTHER,
2490 cm_id_priv->service_timeout,
2491 cm_id_priv->private_data,
2492 cm_id_priv->private_data_len);
2493 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2495 if (ib_post_send_mad(msg, NULL))
2502 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2503 cm_id_priv->tid = lap_msg->hdr.tid;
2504 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2506 list_add_tail(&work->list, &cm_id_priv->work_list);
2507 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2510 cm_process_work(cm_id_priv, work);
2512 cm_deref_id(cm_id_priv);
2515 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2516 deref: cm_deref_id(cm_id_priv);
2520 static void cm_format_apr(struct cm_apr_msg *apr_msg,
2521 struct cm_id_private *cm_id_priv,
2522 enum ib_cm_apr_status status,
2525 const void *private_data,
2526 u8 private_data_len)
2528 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2529 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2530 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2531 apr_msg->ap_status = (u8) status;
2533 if (info && info_length) {
2534 apr_msg->info_length = info_length;
2535 memcpy(apr_msg->info, info, info_length);
2538 if (private_data && private_data_len)
2539 memcpy(apr_msg->private_data, private_data, private_data_len);
2542 int ib_send_cm_apr(struct ib_cm_id *cm_id,
2543 enum ib_cm_apr_status status,
2546 const void *private_data,
2547 u8 private_data_len)
2549 struct cm_id_private *cm_id_priv;
2550 struct ib_mad_send_buf *msg;
2551 unsigned long flags;
2554 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2555 (info && info_length > IB_CM_APR_INFO_LENGTH))
2558 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2559 spin_lock_irqsave(&cm_id_priv->lock, flags);
2560 if (cm_id->state != IB_CM_ESTABLISHED ||
2561 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2562 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2567 ret = cm_alloc_msg(cm_id_priv, &msg);
2571 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2572 info, info_length, private_data, private_data_len);
2573 ret = ib_post_send_mad(msg, NULL);
2575 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2580 cm_id->lap_state = IB_CM_LAP_IDLE;
2581 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2584 EXPORT_SYMBOL(ib_send_cm_apr);
2586 static int cm_apr_handler(struct cm_work *work)
2588 struct cm_id_private *cm_id_priv;
2589 struct cm_apr_msg *apr_msg;
2590 unsigned long flags;
2593 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2594 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2595 apr_msg->local_comm_id);
2597 return -EINVAL; /* Unmatched reply. */
2599 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2600 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2601 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2602 work->cm_event.private_data = &apr_msg->private_data;
2604 spin_lock_irqsave(&cm_id_priv->lock, flags);
2605 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2606 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2607 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2608 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2611 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
2612 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2613 cm_id_priv->msg = NULL;
2615 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2617 list_add_tail(&work->list, &cm_id_priv->work_list);
2618 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2621 cm_process_work(cm_id_priv, work);
2623 cm_deref_id(cm_id_priv);
2626 cm_deref_id(cm_id_priv);
2630 static int cm_timewait_handler(struct cm_work *work)
2632 struct cm_timewait_info *timewait_info;
2633 struct cm_id_private *cm_id_priv;
2636 timewait_info = (struct cm_timewait_info *)work;
2637 spin_lock_irq(&cm.lock);
2638 list_del(&timewait_info->list);
2639 spin_unlock_irq(&cm.lock);
2641 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2642 timewait_info->work.remote_id);
2646 spin_lock_irq(&cm_id_priv->lock);
2647 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2648 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2649 spin_unlock_irq(&cm_id_priv->lock);
2652 cm_id_priv->id.state = IB_CM_IDLE;
2653 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2655 list_add_tail(&work->list, &cm_id_priv->work_list);
2656 spin_unlock_irq(&cm_id_priv->lock);
2659 cm_process_work(cm_id_priv, work);
2661 cm_deref_id(cm_id_priv);
2664 cm_deref_id(cm_id_priv);
2668 static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2669 struct cm_id_private *cm_id_priv,
2670 struct ib_cm_sidr_req_param *param)
2672 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2673 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2674 sidr_req_msg->request_id = cm_id_priv->id.local_id;
2675 sidr_req_msg->pkey = cpu_to_be16(param->path->pkey);
2676 sidr_req_msg->service_id = param->service_id;
2678 if (param->private_data && param->private_data_len)
2679 memcpy(sidr_req_msg->private_data, param->private_data,
2680 param->private_data_len);
2683 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2684 struct ib_cm_sidr_req_param *param)
2686 struct cm_id_private *cm_id_priv;
2687 struct ib_mad_send_buf *msg;
2688 unsigned long flags;
2691 if (!param->path || (param->private_data &&
2692 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2695 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2696 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2700 cm_id->service_id = param->service_id;
2701 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
2702 cm_id_priv->timeout_ms = param->timeout_ms;
2703 cm_id_priv->max_cm_retries = param->max_cm_retries;
2704 ret = cm_alloc_msg(cm_id_priv, &msg);
2708 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2710 msg->timeout_ms = cm_id_priv->timeout_ms;
2711 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2713 spin_lock_irqsave(&cm_id_priv->lock, flags);
2714 if (cm_id->state == IB_CM_IDLE)
2715 ret = ib_post_send_mad(msg, NULL);
2720 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2724 cm_id->state = IB_CM_SIDR_REQ_SENT;
2725 cm_id_priv->msg = msg;
2726 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2730 EXPORT_SYMBOL(ib_send_cm_sidr_req);
2732 static void cm_format_sidr_req_event(struct cm_work *work,
2733 struct ib_cm_id *listen_id)
2735 struct cm_sidr_req_msg *sidr_req_msg;
2736 struct ib_cm_sidr_req_event_param *param;
2738 sidr_req_msg = (struct cm_sidr_req_msg *)
2739 work->mad_recv_wc->recv_buf.mad;
2740 param = &work->cm_event.param.sidr_req_rcvd;
2741 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
2742 param->listen_id = listen_id;
2743 param->port = work->port->port_num;
2744 work->cm_event.private_data = &sidr_req_msg->private_data;
2747 static int cm_sidr_req_handler(struct cm_work *work)
2749 struct ib_cm_id *cm_id;
2750 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2751 struct cm_sidr_req_msg *sidr_req_msg;
2753 unsigned long flags;
2755 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
2757 return PTR_ERR(cm_id);
2758 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2760 /* Record SGID/SLID and request ID for lookup. */
2761 sidr_req_msg = (struct cm_sidr_req_msg *)
2762 work->mad_recv_wc->recv_buf.mad;
2763 wc = work->mad_recv_wc->wc;
2764 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
2765 cm_id_priv->av.dgid.global.interface_id = 0;
2766 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2767 work->mad_recv_wc->recv_buf.grh,
2769 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2770 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2771 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2772 atomic_inc(&cm_id_priv->work_count);
2774 spin_lock_irqsave(&cm.lock, flags);
2775 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2776 if (cur_cm_id_priv) {
2777 spin_unlock_irqrestore(&cm.lock, flags);
2778 goto out; /* Duplicate message. */
2780 cur_cm_id_priv = cm_find_listen(cm_id->device,
2781 sidr_req_msg->service_id,
2782 sidr_req_msg->private_data);
2783 if (!cur_cm_id_priv) {
2784 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2785 spin_unlock_irqrestore(&cm.lock, flags);
2786 /* todo: reply with no match */
2787 goto out; /* No match. */
2789 atomic_inc(&cur_cm_id_priv->refcount);
2790 spin_unlock_irqrestore(&cm.lock, flags);
2792 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2793 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2794 cm_id_priv->id.service_id = sidr_req_msg->service_id;
2795 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
2797 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2798 cm_process_work(cm_id_priv, work);
2799 cm_deref_id(cur_cm_id_priv);
2802 ib_destroy_cm_id(&cm_id_priv->id);
2806 static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2807 struct cm_id_private *cm_id_priv,
2808 struct ib_cm_sidr_rep_param *param)
2810 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2812 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2813 sidr_rep_msg->status = param->status;
2814 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2815 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2816 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2818 if (param->info && param->info_length)
2819 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2821 if (param->private_data && param->private_data_len)
2822 memcpy(sidr_rep_msg->private_data, param->private_data,
2823 param->private_data_len);
2826 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2827 struct ib_cm_sidr_rep_param *param)
2829 struct cm_id_private *cm_id_priv;
2830 struct ib_mad_send_buf *msg;
2831 unsigned long flags;
2834 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2835 (param->private_data &&
2836 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2839 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2840 spin_lock_irqsave(&cm_id_priv->lock, flags);
2841 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2846 ret = cm_alloc_msg(cm_id_priv, &msg);
2850 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2852 ret = ib_post_send_mad(msg, NULL);
2854 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2858 cm_id->state = IB_CM_IDLE;
2859 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2861 spin_lock_irqsave(&cm.lock, flags);
2862 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2863 spin_unlock_irqrestore(&cm.lock, flags);
2866 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2869 EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2871 static void cm_format_sidr_rep_event(struct cm_work *work)
2873 struct cm_sidr_rep_msg *sidr_rep_msg;
2874 struct ib_cm_sidr_rep_event_param *param;
2876 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2877 work->mad_recv_wc->recv_buf.mad;
2878 param = &work->cm_event.param.sidr_rep_rcvd;
2879 param->status = sidr_rep_msg->status;
2880 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2881 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2882 param->info = &sidr_rep_msg->info;
2883 param->info_len = sidr_rep_msg->info_length;
2884 work->cm_event.private_data = &sidr_rep_msg->private_data;
2887 static int cm_sidr_rep_handler(struct cm_work *work)
2889 struct cm_sidr_rep_msg *sidr_rep_msg;
2890 struct cm_id_private *cm_id_priv;
2891 unsigned long flags;
2893 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2894 work->mad_recv_wc->recv_buf.mad;
2895 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2897 return -EINVAL; /* Unmatched reply. */
2899 spin_lock_irqsave(&cm_id_priv->lock, flags);
2900 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2901 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2904 cm_id_priv->id.state = IB_CM_IDLE;
2905 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2906 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2908 cm_format_sidr_rep_event(work);
2909 cm_process_work(cm_id_priv, work);
2912 cm_deref_id(cm_id_priv);
2916 static void cm_process_send_error(struct ib_mad_send_buf *msg,
2917 enum ib_wc_status wc_status)
2919 struct cm_id_private *cm_id_priv;
2920 struct ib_cm_event cm_event;
2921 enum ib_cm_state state;
2922 unsigned long flags;
2925 memset(&cm_event, 0, sizeof cm_event);
2926 cm_id_priv = msg->context[0];
2928 /* Discard old sends or ones without a response. */
2929 spin_lock_irqsave(&cm_id_priv->lock, flags);
2930 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2931 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2935 case IB_CM_REQ_SENT:
2936 case IB_CM_MRA_REQ_RCVD:
2937 cm_reset_to_idle(cm_id_priv);
2938 cm_event.event = IB_CM_REQ_ERROR;
2940 case IB_CM_REP_SENT:
2941 case IB_CM_MRA_REP_RCVD:
2942 cm_reset_to_idle(cm_id_priv);
2943 cm_event.event = IB_CM_REP_ERROR;
2945 case IB_CM_DREQ_SENT:
2946 cm_enter_timewait(cm_id_priv);
2947 cm_event.event = IB_CM_DREQ_ERROR;
2949 case IB_CM_SIDR_REQ_SENT:
2950 cm_id_priv->id.state = IB_CM_IDLE;
2951 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2956 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2957 cm_event.param.send_status = wc_status;
2959 /* No other events can occur on the cm_id at this point. */
2960 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2963 ib_destroy_cm_id(&cm_id_priv->id);
2966 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2970 static void cm_send_handler(struct ib_mad_agent *mad_agent,
2971 struct ib_mad_send_wc *mad_send_wc)
2973 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
2975 switch (mad_send_wc->status) {
2977 case IB_WC_WR_FLUSH_ERR:
2981 if (msg->context[0] && msg->context[1])
2982 cm_process_send_error(msg, mad_send_wc->status);
2989 static void cm_work_handler(struct work_struct *_work)
2991 struct cm_work *work = container_of(_work, struct cm_work, work.work);
2994 switch (work->cm_event.event) {
2995 case IB_CM_REQ_RECEIVED:
2996 ret = cm_req_handler(work);
2998 case IB_CM_MRA_RECEIVED:
2999 ret = cm_mra_handler(work);
3001 case IB_CM_REJ_RECEIVED:
3002 ret = cm_rej_handler(work);
3004 case IB_CM_REP_RECEIVED:
3005 ret = cm_rep_handler(work);
3007 case IB_CM_RTU_RECEIVED:
3008 ret = cm_rtu_handler(work);
3010 case IB_CM_USER_ESTABLISHED:
3011 ret = cm_establish_handler(work);
3013 case IB_CM_DREQ_RECEIVED:
3014 ret = cm_dreq_handler(work);
3016 case IB_CM_DREP_RECEIVED:
3017 ret = cm_drep_handler(work);
3019 case IB_CM_SIDR_REQ_RECEIVED:
3020 ret = cm_sidr_req_handler(work);
3022 case IB_CM_SIDR_REP_RECEIVED:
3023 ret = cm_sidr_rep_handler(work);
3025 case IB_CM_LAP_RECEIVED:
3026 ret = cm_lap_handler(work);
3028 case IB_CM_APR_RECEIVED:
3029 ret = cm_apr_handler(work);
3031 case IB_CM_TIMEWAIT_EXIT:
3032 ret = cm_timewait_handler(work);
3042 int ib_cm_establish(struct ib_cm_id *cm_id)
3044 struct cm_id_private *cm_id_priv;
3045 struct cm_work *work;
3046 unsigned long flags;
3049 work = kmalloc(sizeof *work, GFP_ATOMIC);
3053 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3054 spin_lock_irqsave(&cm_id_priv->lock, flags);
3055 switch (cm_id->state)
3057 case IB_CM_REP_SENT:
3058 case IB_CM_MRA_REP_RCVD:
3059 cm_id->state = IB_CM_ESTABLISHED;
3061 case IB_CM_ESTABLISHED:
3068 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3076 * The CM worker thread may try to destroy the cm_id before it
3077 * can execute this work item. To prevent potential deadlock,
3078 * we need to find the cm_id once we're in the context of the
3079 * worker thread, rather than holding a reference on it.
3081 INIT_DELAYED_WORK(&work->work, cm_work_handler);
3082 work->local_id = cm_id->local_id;
3083 work->remote_id = cm_id->remote_id;
3084 work->mad_recv_wc = NULL;
3085 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3086 queue_delayed_work(cm.wq, &work->work, 0);
3090 EXPORT_SYMBOL(ib_cm_establish);
3092 static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3093 struct ib_mad_recv_wc *mad_recv_wc)
3095 struct cm_work *work;
3096 enum ib_cm_event_type event;
3099 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3100 case CM_REQ_ATTR_ID:
3101 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3102 alt_local_lid != 0);
3103 event = IB_CM_REQ_RECEIVED;
3105 case CM_MRA_ATTR_ID:
3106 event = IB_CM_MRA_RECEIVED;
3108 case CM_REJ_ATTR_ID:
3109 event = IB_CM_REJ_RECEIVED;
3111 case CM_REP_ATTR_ID:
3112 event = IB_CM_REP_RECEIVED;
3114 case CM_RTU_ATTR_ID:
3115 event = IB_CM_RTU_RECEIVED;
3117 case CM_DREQ_ATTR_ID:
3118 event = IB_CM_DREQ_RECEIVED;
3120 case CM_DREP_ATTR_ID:
3121 event = IB_CM_DREP_RECEIVED;
3123 case CM_SIDR_REQ_ATTR_ID:
3124 event = IB_CM_SIDR_REQ_RECEIVED;
3126 case CM_SIDR_REP_ATTR_ID:
3127 event = IB_CM_SIDR_REP_RECEIVED;
3129 case CM_LAP_ATTR_ID:
3131 event = IB_CM_LAP_RECEIVED;
3133 case CM_APR_ATTR_ID:
3134 event = IB_CM_APR_RECEIVED;
3137 ib_free_recv_mad(mad_recv_wc);
3141 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3144 ib_free_recv_mad(mad_recv_wc);
3148 INIT_DELAYED_WORK(&work->work, cm_work_handler);
3149 work->cm_event.event = event;
3150 work->mad_recv_wc = mad_recv_wc;
3151 work->port = (struct cm_port *)mad_agent->context;
3152 queue_delayed_work(cm.wq, &work->work, 0);
3155 static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3156 struct ib_qp_attr *qp_attr,
3159 unsigned long flags;
3162 spin_lock_irqsave(&cm_id_priv->lock, flags);
3163 switch (cm_id_priv->id.state) {
3164 case IB_CM_REQ_SENT:
3165 case IB_CM_MRA_REQ_RCVD:
3166 case IB_CM_REQ_RCVD:
3167 case IB_CM_MRA_REQ_SENT:
3168 case IB_CM_REP_RCVD:
3169 case IB_CM_MRA_REP_SENT:
3170 case IB_CM_REP_SENT:
3171 case IB_CM_MRA_REP_RCVD:
3172 case IB_CM_ESTABLISHED:
3173 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3174 IB_QP_PKEY_INDEX | IB_QP_PORT;
3175 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE |
3176 IB_ACCESS_REMOTE_WRITE;
3177 if (cm_id_priv->responder_resources)
3178 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3179 IB_ACCESS_REMOTE_ATOMIC;
3180 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3181 qp_attr->port_num = cm_id_priv->av.port->port_num;
3188 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3192 static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3193 struct ib_qp_attr *qp_attr,
3196 unsigned long flags;
3199 spin_lock_irqsave(&cm_id_priv->lock, flags);
3200 switch (cm_id_priv->id.state) {
3201 case IB_CM_REQ_RCVD:
3202 case IB_CM_MRA_REQ_SENT:
3203 case IB_CM_REP_RCVD:
3204 case IB_CM_MRA_REP_SENT:
3205 case IB_CM_REP_SENT:
3206 case IB_CM_MRA_REP_RCVD:
3207 case IB_CM_ESTABLISHED:
3208 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
3209 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
3210 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3211 qp_attr->path_mtu = cm_id_priv->path_mtu;
3212 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3213 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
3214 if (cm_id_priv->qp_type == IB_QPT_RC) {
3215 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3216 IB_QP_MIN_RNR_TIMER;
3217 qp_attr->max_dest_rd_atomic =
3218 cm_id_priv->responder_resources;
3219 qp_attr->min_rnr_timer = 0;
3221 if (cm_id_priv->alt_av.ah_attr.dlid) {
3222 *qp_attr_mask |= IB_QP_ALT_PATH;
3223 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3224 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3232 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3236 static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3237 struct ib_qp_attr *qp_attr,
3240 unsigned long flags;
3243 spin_lock_irqsave(&cm_id_priv->lock, flags);
3244 switch (cm_id_priv->id.state) {
3245 case IB_CM_REP_RCVD:
3246 case IB_CM_MRA_REP_SENT:
3247 case IB_CM_REP_SENT:
3248 case IB_CM_MRA_REP_RCVD:
3249 case IB_CM_ESTABLISHED:
3250 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
3251 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
3252 if (cm_id_priv->qp_type == IB_QPT_RC) {
3253 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3255 IB_QP_MAX_QP_RD_ATOMIC;
3256 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3257 qp_attr->retry_cnt = cm_id_priv->retry_count;
3258 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3259 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3261 if (cm_id_priv->alt_av.ah_attr.dlid) {
3262 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3263 qp_attr->path_mig_state = IB_MIG_REARM;
3271 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3275 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3276 struct ib_qp_attr *qp_attr,
3279 struct cm_id_private *cm_id_priv;
3282 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3283 switch (qp_attr->qp_state) {
3285 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3288 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3291 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3299 EXPORT_SYMBOL(ib_cm_init_qp_attr);
3301 static void cm_add_one(struct ib_device *device)
3303 struct cm_device *cm_dev;
3304 struct cm_port *port;
3305 struct ib_mad_reg_req reg_req = {
3306 .mgmt_class = IB_MGMT_CLASS_CM,
3307 .mgmt_class_version = IB_CM_CLASS_VERSION
3309 struct ib_port_modify port_modify = {
3310 .set_port_cap_mask = IB_PORT_CM_SUP
3312 unsigned long flags;
3316 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
3319 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3320 device->phys_port_cnt, GFP_KERNEL);
3324 cm_dev->device = device;
3325 cm_dev->ca_guid = device->node_guid;
3327 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3328 for (i = 1; i <= device->phys_port_cnt; i++) {
3329 port = &cm_dev->port[i-1];
3330 port->cm_dev = cm_dev;
3332 port->mad_agent = ib_register_mad_agent(device, i,
3339 if (IS_ERR(port->mad_agent))
3342 ret = ib_modify_port(device, i, 0, &port_modify);
3346 ib_set_client_data(device, &cm_client, cm_dev);
3348 write_lock_irqsave(&cm.device_lock, flags);
3349 list_add_tail(&cm_dev->list, &cm.device_list);
3350 write_unlock_irqrestore(&cm.device_lock, flags);
3354 ib_unregister_mad_agent(port->mad_agent);
3356 port_modify.set_port_cap_mask = 0;
3357 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3359 port = &cm_dev->port[i-1];
3360 ib_modify_port(device, port->port_num, 0, &port_modify);
3361 ib_unregister_mad_agent(port->mad_agent);
3366 static void cm_remove_one(struct ib_device *device)
3368 struct cm_device *cm_dev;
3369 struct cm_port *port;
3370 struct ib_port_modify port_modify = {
3371 .clr_port_cap_mask = IB_PORT_CM_SUP
3373 unsigned long flags;
3376 cm_dev = ib_get_client_data(device, &cm_client);
3380 write_lock_irqsave(&cm.device_lock, flags);
3381 list_del(&cm_dev->list);
3382 write_unlock_irqrestore(&cm.device_lock, flags);
3384 for (i = 1; i <= device->phys_port_cnt; i++) {
3385 port = &cm_dev->port[i-1];
3386 ib_modify_port(device, port->port_num, 0, &port_modify);
3387 ib_unregister_mad_agent(port->mad_agent);
3392 static int __init ib_cm_init(void)
3396 memset(&cm, 0, sizeof cm);
3397 INIT_LIST_HEAD(&cm.device_list);
3398 rwlock_init(&cm.device_lock);
3399 spin_lock_init(&cm.lock);
3400 cm.listen_service_table = RB_ROOT;
3401 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3402 cm.remote_id_table = RB_ROOT;
3403 cm.remote_qp_table = RB_ROOT;
3404 cm.remote_sidr_table = RB_ROOT;
3405 idr_init(&cm.local_id_table);
3406 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
3407 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3408 INIT_LIST_HEAD(&cm.timewait_list);
3410 cm.wq = create_workqueue("ib_cm");
3414 ret = ib_register_client(&cm_client);
3420 destroy_workqueue(cm.wq);
3424 static void __exit ib_cm_cleanup(void)
3426 struct cm_timewait_info *timewait_info, *tmp;
3428 spin_lock_irq(&cm.lock);
3429 list_for_each_entry(timewait_info, &cm.timewait_list, list)
3430 cancel_delayed_work(&timewait_info->work.work);
3431 spin_unlock_irq(&cm.lock);
3433 destroy_workqueue(cm.wq);
3435 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
3436 list_del(&timewait_info->list);
3437 kfree(timewait_info);
3440 ib_unregister_client(&cm_client);
3441 idr_destroy(&cm.local_id_table);
3444 module_init(ib_cm_init);
3445 module_exit(ib_cm_cleanup);