2 * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $
38 #include <linux/completion.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/err.h>
41 #include <linux/idr.h>
42 #include <linux/interrupt.h>
43 #include <linux/pci.h>
44 #include <linux/rbtree.h>
45 #include <linux/spinlock.h>
46 #include <linux/workqueue.h>
48 #include <rdma/ib_cache.h>
49 #include <rdma/ib_cm.h>
52 MODULE_AUTHOR("Sean Hefty");
53 MODULE_DESCRIPTION("InfiniBand CM");
54 MODULE_LICENSE("Dual BSD/GPL");
56 static void cm_add_one(struct ib_device *device);
57 static void cm_remove_one(struct ib_device *device);
59 static struct ib_client cm_client = {
62 .remove = cm_remove_one
67 struct list_head device_list;
69 struct rb_root listen_service_table;
70 u64 listen_service_id;
71 /* struct rb_root peer_service_table; todo: fix peer to peer */
72 struct rb_root remote_qp_table;
73 struct rb_root remote_id_table;
74 struct rb_root remote_sidr_table;
75 struct idr local_id_table;
76 struct workqueue_struct *wq;
80 struct cm_device *cm_dev;
81 struct ib_mad_agent *mad_agent;
86 struct list_head list;
87 struct ib_device *device;
89 struct cm_port port[0];
95 struct ib_ah_attr ah_attr;
101 struct work_struct work;
102 struct list_head list;
103 struct cm_port *port;
104 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
105 __be32 local_id; /* Established / timewait */
107 struct ib_cm_event cm_event;
108 struct ib_sa_path_rec path[0];
111 struct cm_timewait_info {
112 struct cm_work work; /* Must be first. */
113 struct rb_node remote_qp_node;
114 struct rb_node remote_id_node;
115 __be64 remote_ca_guid;
117 u8 inserted_remote_qp;
118 u8 inserted_remote_id;
121 struct cm_id_private {
124 struct rb_node service_node;
125 struct rb_node sidr_id_node;
126 spinlock_t lock; /* Do not acquire inside cm.lock */
127 struct completion comp;
130 struct ib_mad_send_buf *msg;
131 struct cm_timewait_info *timewait_info;
132 /* todo: use alternate port on send failure */
135 struct ib_cm_compare_data *compare_data;
141 enum ib_qp_type qp_type;
145 enum ib_mtu path_mtu;
149 u8 responder_resources;
151 u8 local_ack_timeout;
156 struct list_head work_list;
160 static void cm_work_handler(void *data);
162 static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
164 if (atomic_dec_and_test(&cm_id_priv->refcount))
165 complete(&cm_id_priv->comp);
168 static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
169 struct ib_mad_send_buf **msg)
171 struct ib_mad_agent *mad_agent;
172 struct ib_mad_send_buf *m;
175 mad_agent = cm_id_priv->av.port->mad_agent;
176 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
180 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
181 cm_id_priv->av.pkey_index,
182 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
189 /* Timeout set by caller if response is expected. */
191 m->retries = cm_id_priv->max_cm_retries;
193 atomic_inc(&cm_id_priv->refcount);
194 m->context[0] = cm_id_priv;
199 static int cm_alloc_response_msg(struct cm_port *port,
200 struct ib_mad_recv_wc *mad_recv_wc,
201 struct ib_mad_send_buf **msg)
203 struct ib_mad_send_buf *m;
206 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
207 mad_recv_wc->recv_buf.grh, port->port_num);
211 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
212 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
223 static void cm_free_msg(struct ib_mad_send_buf *msg)
225 ib_destroy_ah(msg->ah);
227 cm_deref_id(msg->context[0]);
228 ib_free_send_mad(msg);
231 static void * cm_copy_private_data(const void *private_data,
236 if (!private_data || !private_data_len)
239 data = kmalloc(private_data_len, GFP_KERNEL);
241 return ERR_PTR(-ENOMEM);
243 memcpy(data, private_data, private_data_len);
247 static void cm_set_private_data(struct cm_id_private *cm_id_priv,
248 void *private_data, u8 private_data_len)
250 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
251 kfree(cm_id_priv->private_data);
253 cm_id_priv->private_data = private_data;
254 cm_id_priv->private_data_len = private_data_len;
257 static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
258 struct ib_grh *grh, struct cm_av *av)
261 av->pkey_index = wc->pkey_index;
262 ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc,
266 static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
268 struct cm_device *cm_dev;
269 struct cm_port *port = NULL;
274 read_lock_irqsave(&cm.device_lock, flags);
275 list_for_each_entry(cm_dev, &cm.device_list, list) {
276 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
278 port = &cm_dev->port[p-1];
282 read_unlock_irqrestore(&cm.device_lock, flags);
287 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
288 be16_to_cpu(path->pkey), &av->pkey_index);
293 ib_init_ah_from_path(cm_dev->device, port->port_num, path,
295 av->packet_life_time = path->packet_life_time;
299 static int cm_alloc_id(struct cm_id_private *cm_id_priv)
306 spin_lock_irqsave(&cm.lock, flags);
307 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, next_id++,
308 (__force int *) &cm_id_priv->id.local_id);
309 spin_unlock_irqrestore(&cm.lock, flags);
310 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
314 static void cm_free_id(__be32 local_id)
318 spin_lock_irqsave(&cm.lock, flags);
319 idr_remove(&cm.local_id_table, (__force int) local_id);
320 spin_unlock_irqrestore(&cm.lock, flags);
323 static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
325 struct cm_id_private *cm_id_priv;
327 cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id);
329 if (cm_id_priv->id.remote_id == remote_id)
330 atomic_inc(&cm_id_priv->refcount);
338 static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
340 struct cm_id_private *cm_id_priv;
343 spin_lock_irqsave(&cm.lock, flags);
344 cm_id_priv = cm_get_id(local_id, remote_id);
345 spin_unlock_irqrestore(&cm.lock, flags);
350 static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
354 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
355 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
356 ((unsigned long *) mask)[i];
359 static int cm_compare_data(struct ib_cm_compare_data *src_data,
360 struct ib_cm_compare_data *dst_data)
362 u8 src[IB_CM_COMPARE_SIZE];
363 u8 dst[IB_CM_COMPARE_SIZE];
365 if (!src_data || !dst_data)
368 cm_mask_copy(src, src_data->data, dst_data->mask);
369 cm_mask_copy(dst, dst_data->data, src_data->mask);
370 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
373 static int cm_compare_private_data(u8 *private_data,
374 struct ib_cm_compare_data *dst_data)
376 u8 src[IB_CM_COMPARE_SIZE];
381 cm_mask_copy(src, private_data, dst_data->mask);
382 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
385 static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
387 struct rb_node **link = &cm.listen_service_table.rb_node;
388 struct rb_node *parent = NULL;
389 struct cm_id_private *cur_cm_id_priv;
390 __be64 service_id = cm_id_priv->id.service_id;
391 __be64 service_mask = cm_id_priv->id.service_mask;
396 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
398 data_cmp = cm_compare_data(cm_id_priv->compare_data,
399 cur_cm_id_priv->compare_data);
400 if ((cur_cm_id_priv->id.service_mask & service_id) ==
401 (service_mask & cur_cm_id_priv->id.service_id) &&
402 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
404 return cur_cm_id_priv;
406 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
407 link = &(*link)->rb_left;
408 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
409 link = &(*link)->rb_right;
410 else if (service_id < cur_cm_id_priv->id.service_id)
411 link = &(*link)->rb_left;
412 else if (service_id > cur_cm_id_priv->id.service_id)
413 link = &(*link)->rb_right;
414 else if (data_cmp < 0)
415 link = &(*link)->rb_left;
417 link = &(*link)->rb_right;
419 rb_link_node(&cm_id_priv->service_node, parent, link);
420 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
424 static struct cm_id_private * cm_find_listen(struct ib_device *device,
428 struct rb_node *node = cm.listen_service_table.rb_node;
429 struct cm_id_private *cm_id_priv;
433 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
434 data_cmp = cm_compare_private_data(private_data,
435 cm_id_priv->compare_data);
436 if ((cm_id_priv->id.service_mask & service_id) ==
437 cm_id_priv->id.service_id &&
438 (cm_id_priv->id.device == device) && !data_cmp)
441 if (device < cm_id_priv->id.device)
442 node = node->rb_left;
443 else if (device > cm_id_priv->id.device)
444 node = node->rb_right;
445 else if (service_id < cm_id_priv->id.service_id)
446 node = node->rb_left;
447 else if (service_id > cm_id_priv->id.service_id)
448 node = node->rb_right;
449 else if (data_cmp < 0)
450 node = node->rb_left;
452 node = node->rb_right;
457 static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
460 struct rb_node **link = &cm.remote_id_table.rb_node;
461 struct rb_node *parent = NULL;
462 struct cm_timewait_info *cur_timewait_info;
463 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
464 __be32 remote_id = timewait_info->work.remote_id;
468 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
470 if (remote_id < cur_timewait_info->work.remote_id)
471 link = &(*link)->rb_left;
472 else if (remote_id > cur_timewait_info->work.remote_id)
473 link = &(*link)->rb_right;
474 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
475 link = &(*link)->rb_left;
476 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
477 link = &(*link)->rb_right;
479 return cur_timewait_info;
481 timewait_info->inserted_remote_id = 1;
482 rb_link_node(&timewait_info->remote_id_node, parent, link);
483 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
487 static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
490 struct rb_node *node = cm.remote_id_table.rb_node;
491 struct cm_timewait_info *timewait_info;
494 timewait_info = rb_entry(node, struct cm_timewait_info,
496 if (remote_id < timewait_info->work.remote_id)
497 node = node->rb_left;
498 else if (remote_id > timewait_info->work.remote_id)
499 node = node->rb_right;
500 else if (remote_ca_guid < timewait_info->remote_ca_guid)
501 node = node->rb_left;
502 else if (remote_ca_guid > timewait_info->remote_ca_guid)
503 node = node->rb_right;
505 return timewait_info;
510 static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
513 struct rb_node **link = &cm.remote_qp_table.rb_node;
514 struct rb_node *parent = NULL;
515 struct cm_timewait_info *cur_timewait_info;
516 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
517 __be32 remote_qpn = timewait_info->remote_qpn;
521 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
523 if (remote_qpn < cur_timewait_info->remote_qpn)
524 link = &(*link)->rb_left;
525 else if (remote_qpn > cur_timewait_info->remote_qpn)
526 link = &(*link)->rb_right;
527 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
528 link = &(*link)->rb_left;
529 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
530 link = &(*link)->rb_right;
532 return cur_timewait_info;
534 timewait_info->inserted_remote_qp = 1;
535 rb_link_node(&timewait_info->remote_qp_node, parent, link);
536 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
540 static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
543 struct rb_node **link = &cm.remote_sidr_table.rb_node;
544 struct rb_node *parent = NULL;
545 struct cm_id_private *cur_cm_id_priv;
546 union ib_gid *port_gid = &cm_id_priv->av.dgid;
547 __be32 remote_id = cm_id_priv->id.remote_id;
551 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
553 if (remote_id < cur_cm_id_priv->id.remote_id)
554 link = &(*link)->rb_left;
555 else if (remote_id > cur_cm_id_priv->id.remote_id)
556 link = &(*link)->rb_right;
559 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
562 link = &(*link)->rb_left;
564 link = &(*link)->rb_right;
566 return cur_cm_id_priv;
569 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
570 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
574 static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
575 enum ib_cm_sidr_status status)
577 struct ib_cm_sidr_rep_param param;
579 memset(¶m, 0, sizeof param);
580 param.status = status;
581 ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m);
584 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
585 ib_cm_handler cm_handler,
588 struct cm_id_private *cm_id_priv;
591 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
593 return ERR_PTR(-ENOMEM);
595 cm_id_priv->id.state = IB_CM_IDLE;
596 cm_id_priv->id.device = device;
597 cm_id_priv->id.cm_handler = cm_handler;
598 cm_id_priv->id.context = context;
599 cm_id_priv->id.remote_cm_qpn = 1;
600 ret = cm_alloc_id(cm_id_priv);
604 spin_lock_init(&cm_id_priv->lock);
605 init_completion(&cm_id_priv->comp);
606 INIT_LIST_HEAD(&cm_id_priv->work_list);
607 atomic_set(&cm_id_priv->work_count, -1);
608 atomic_set(&cm_id_priv->refcount, 1);
609 return &cm_id_priv->id;
613 return ERR_PTR(-ENOMEM);
615 EXPORT_SYMBOL(ib_create_cm_id);
617 static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
619 struct cm_work *work;
621 if (list_empty(&cm_id_priv->work_list))
624 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
625 list_del(&work->list);
629 static void cm_free_work(struct cm_work *work)
631 if (work->mad_recv_wc)
632 ib_free_recv_mad(work->mad_recv_wc);
636 static inline int cm_convert_to_ms(int iba_time)
638 /* approximate conversion to ms from 4.096us x 2^iba_time */
639 return 1 << max(iba_time - 8, 0);
642 static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
646 if (!timewait_info->inserted_remote_id &&
647 !timewait_info->inserted_remote_qp)
650 spin_lock_irqsave(&cm.lock, flags);
651 if (timewait_info->inserted_remote_id) {
652 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
653 timewait_info->inserted_remote_id = 0;
656 if (timewait_info->inserted_remote_qp) {
657 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
658 timewait_info->inserted_remote_qp = 0;
660 spin_unlock_irqrestore(&cm.lock, flags);
663 static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
665 struct cm_timewait_info *timewait_info;
667 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
669 return ERR_PTR(-ENOMEM);
671 timewait_info->work.local_id = local_id;
672 INIT_WORK(&timewait_info->work.work, cm_work_handler,
673 &timewait_info->work);
674 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
675 return timewait_info;
678 static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
683 * The cm_id could be destroyed by the user before we exit timewait.
684 * To protect against this, we search for the cm_id after exiting
685 * timewait before notifying the user that we've exited timewait.
687 cm_id_priv->id.state = IB_CM_TIMEWAIT;
688 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
689 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
690 msecs_to_jiffies(wait_time));
691 cm_id_priv->timewait_info = NULL;
694 static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
696 cm_id_priv->id.state = IB_CM_IDLE;
697 if (cm_id_priv->timewait_info) {
698 cm_cleanup_timewait(cm_id_priv->timewait_info);
699 kfree(cm_id_priv->timewait_info);
700 cm_id_priv->timewait_info = NULL;
704 static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
706 struct cm_id_private *cm_id_priv;
707 struct cm_work *work;
710 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
712 spin_lock_irqsave(&cm_id_priv->lock, flags);
713 switch (cm_id->state) {
715 cm_id->state = IB_CM_IDLE;
716 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
717 spin_lock_irqsave(&cm.lock, flags);
718 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
719 spin_unlock_irqrestore(&cm.lock, flags);
721 case IB_CM_SIDR_REQ_SENT:
722 cm_id->state = IB_CM_IDLE;
723 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
724 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
726 case IB_CM_SIDR_REQ_RCVD:
727 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
728 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
731 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
732 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
733 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
734 &cm_id_priv->av.port->cm_dev->ca_guid,
735 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
739 if (err == -ENOMEM) {
740 /* Do not reject to allow future retries. */
741 cm_reset_to_idle(cm_id_priv);
742 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
744 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
745 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
749 case IB_CM_MRA_REQ_RCVD:
751 case IB_CM_MRA_REP_RCVD:
752 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
754 case IB_CM_MRA_REQ_SENT:
756 case IB_CM_MRA_REP_SENT:
757 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
758 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
761 case IB_CM_ESTABLISHED:
762 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
763 ib_send_cm_dreq(cm_id, NULL, 0);
765 case IB_CM_DREQ_SENT:
766 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
767 cm_enter_timewait(cm_id_priv);
768 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
770 case IB_CM_DREQ_RCVD:
771 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
772 ib_send_cm_drep(cm_id, NULL, 0);
775 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
779 cm_free_id(cm_id->local_id);
780 cm_deref_id(cm_id_priv);
781 wait_for_completion(&cm_id_priv->comp);
782 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
784 kfree(cm_id_priv->compare_data);
785 kfree(cm_id_priv->private_data);
789 void ib_destroy_cm_id(struct ib_cm_id *cm_id)
791 cm_destroy_id(cm_id, 0);
793 EXPORT_SYMBOL(ib_destroy_cm_id);
795 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
796 struct ib_cm_compare_data *compare_data)
798 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
802 service_mask = service_mask ? service_mask :
803 __constant_cpu_to_be64(~0ULL);
804 service_id &= service_mask;
805 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
806 (service_id != IB_CM_ASSIGN_SERVICE_ID))
809 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
810 if (cm_id->state != IB_CM_IDLE)
814 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
816 if (!cm_id_priv->compare_data)
818 cm_mask_copy(cm_id_priv->compare_data->data,
819 compare_data->data, compare_data->mask);
820 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
824 cm_id->state = IB_CM_LISTEN;
826 spin_lock_irqsave(&cm.lock, flags);
827 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
828 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
829 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
831 cm_id->service_id = service_id;
832 cm_id->service_mask = service_mask;
834 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
835 spin_unlock_irqrestore(&cm.lock, flags);
837 if (cur_cm_id_priv) {
838 cm_id->state = IB_CM_IDLE;
839 kfree(cm_id_priv->compare_data);
840 cm_id_priv->compare_data = NULL;
845 EXPORT_SYMBOL(ib_cm_listen);
847 static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
848 enum cm_msg_sequence msg_seq)
852 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
853 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
855 return cpu_to_be64(hi_tid | low_tid);
858 static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
859 __be16 attr_id, __be64 tid)
861 hdr->base_version = IB_MGMT_BASE_VERSION;
862 hdr->mgmt_class = IB_MGMT_CLASS_CM;
863 hdr->class_version = IB_CM_CLASS_VERSION;
864 hdr->method = IB_MGMT_METHOD_SEND;
865 hdr->attr_id = attr_id;
869 static void cm_format_req(struct cm_req_msg *req_msg,
870 struct cm_id_private *cm_id_priv,
871 struct ib_cm_req_param *param)
873 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
874 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
876 req_msg->local_comm_id = cm_id_priv->id.local_id;
877 req_msg->service_id = param->service_id;
878 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
879 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
880 cm_req_set_resp_res(req_msg, param->responder_resources);
881 cm_req_set_init_depth(req_msg, param->initiator_depth);
882 cm_req_set_remote_resp_timeout(req_msg,
883 param->remote_cm_response_timeout);
884 cm_req_set_qp_type(req_msg, param->qp_type);
885 cm_req_set_flow_ctrl(req_msg, param->flow_control);
886 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
887 cm_req_set_local_resp_timeout(req_msg,
888 param->local_cm_response_timeout);
889 cm_req_set_retry_count(req_msg, param->retry_count);
890 req_msg->pkey = param->primary_path->pkey;
891 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
892 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
893 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
894 cm_req_set_srq(req_msg, param->srq);
896 req_msg->primary_local_lid = param->primary_path->slid;
897 req_msg->primary_remote_lid = param->primary_path->dlid;
898 req_msg->primary_local_gid = param->primary_path->sgid;
899 req_msg->primary_remote_gid = param->primary_path->dgid;
900 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
901 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
902 req_msg->primary_traffic_class = param->primary_path->traffic_class;
903 req_msg->primary_hop_limit = param->primary_path->hop_limit;
904 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
905 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
906 cm_req_set_primary_local_ack_timeout(req_msg,
907 min(31, param->primary_path->packet_life_time + 1));
909 if (param->alternate_path) {
910 req_msg->alt_local_lid = param->alternate_path->slid;
911 req_msg->alt_remote_lid = param->alternate_path->dlid;
912 req_msg->alt_local_gid = param->alternate_path->sgid;
913 req_msg->alt_remote_gid = param->alternate_path->dgid;
914 cm_req_set_alt_flow_label(req_msg,
915 param->alternate_path->flow_label);
916 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
917 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
918 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
919 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
920 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
921 cm_req_set_alt_local_ack_timeout(req_msg,
922 min(31, param->alternate_path->packet_life_time + 1));
925 if (param->private_data && param->private_data_len)
926 memcpy(req_msg->private_data, param->private_data,
927 param->private_data_len);
930 static int cm_validate_req_param(struct ib_cm_req_param *param)
932 /* peer-to-peer not supported */
933 if (param->peer_to_peer)
936 if (!param->primary_path)
939 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
942 if (param->private_data &&
943 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
946 if (param->alternate_path &&
947 (param->alternate_path->pkey != param->primary_path->pkey ||
948 param->alternate_path->mtu != param->primary_path->mtu))
954 int ib_send_cm_req(struct ib_cm_id *cm_id,
955 struct ib_cm_req_param *param)
957 struct cm_id_private *cm_id_priv;
958 struct cm_req_msg *req_msg;
962 ret = cm_validate_req_param(param);
966 /* Verify that we're not in timewait. */
967 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
968 spin_lock_irqsave(&cm_id_priv->lock, flags);
969 if (cm_id->state != IB_CM_IDLE) {
970 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
974 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
976 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
978 if (IS_ERR(cm_id_priv->timewait_info)) {
979 ret = PTR_ERR(cm_id_priv->timewait_info);
983 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
986 if (param->alternate_path) {
987 ret = cm_init_av_by_path(param->alternate_path,
988 &cm_id_priv->alt_av);
992 cm_id->service_id = param->service_id;
993 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
994 cm_id_priv->timeout_ms = cm_convert_to_ms(
995 param->primary_path->packet_life_time) * 2 +
997 param->remote_cm_response_timeout);
998 cm_id_priv->max_cm_retries = param->max_cm_retries;
999 cm_id_priv->initiator_depth = param->initiator_depth;
1000 cm_id_priv->responder_resources = param->responder_resources;
1001 cm_id_priv->retry_count = param->retry_count;
1002 cm_id_priv->path_mtu = param->primary_path->mtu;
1003 cm_id_priv->qp_type = param->qp_type;
1005 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1009 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1010 cm_format_req(req_msg, cm_id_priv, param);
1011 cm_id_priv->tid = req_msg->hdr.tid;
1012 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
1013 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1015 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1016 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
1017 cm_id_priv->local_ack_timeout =
1018 cm_req_get_primary_local_ack_timeout(req_msg);
1020 spin_lock_irqsave(&cm_id_priv->lock, flags);
1021 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
1023 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1026 BUG_ON(cm_id->state != IB_CM_IDLE);
1027 cm_id->state = IB_CM_REQ_SENT;
1028 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1031 error2: cm_free_msg(cm_id_priv->msg);
1032 error1: kfree(cm_id_priv->timewait_info);
1035 EXPORT_SYMBOL(ib_send_cm_req);
1037 static int cm_issue_rej(struct cm_port *port,
1038 struct ib_mad_recv_wc *mad_recv_wc,
1039 enum ib_cm_rej_reason reason,
1040 enum cm_msg_response msg_rejected,
1041 void *ari, u8 ari_length)
1043 struct ib_mad_send_buf *msg = NULL;
1044 struct cm_rej_msg *rej_msg, *rcv_msg;
1047 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1051 /* We just need common CM header information. Cast to any message. */
1052 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1053 rej_msg = (struct cm_rej_msg *) msg->mad;
1055 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1056 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1057 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1058 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
1059 rej_msg->reason = cpu_to_be16(reason);
1061 if (ari && ari_length) {
1062 cm_rej_set_reject_info_len(rej_msg, ari_length);
1063 memcpy(rej_msg->ari, ari, ari_length);
1066 ret = ib_post_send_mad(msg, NULL);
1073 static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1074 __be32 local_qpn, __be32 remote_qpn)
1076 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1077 ((local_ca_guid == remote_ca_guid) &&
1078 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1081 static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
1082 struct ib_sa_path_rec *primary_path,
1083 struct ib_sa_path_rec *alt_path)
1085 memset(primary_path, 0, sizeof *primary_path);
1086 primary_path->dgid = req_msg->primary_local_gid;
1087 primary_path->sgid = req_msg->primary_remote_gid;
1088 primary_path->dlid = req_msg->primary_local_lid;
1089 primary_path->slid = req_msg->primary_remote_lid;
1090 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1091 primary_path->hop_limit = req_msg->primary_hop_limit;
1092 primary_path->traffic_class = req_msg->primary_traffic_class;
1093 primary_path->reversible = 1;
1094 primary_path->pkey = req_msg->pkey;
1095 primary_path->sl = cm_req_get_primary_sl(req_msg);
1096 primary_path->mtu_selector = IB_SA_EQ;
1097 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1098 primary_path->rate_selector = IB_SA_EQ;
1099 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1100 primary_path->packet_life_time_selector = IB_SA_EQ;
1101 primary_path->packet_life_time =
1102 cm_req_get_primary_local_ack_timeout(req_msg);
1103 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1105 if (req_msg->alt_local_lid) {
1106 memset(alt_path, 0, sizeof *alt_path);
1107 alt_path->dgid = req_msg->alt_local_gid;
1108 alt_path->sgid = req_msg->alt_remote_gid;
1109 alt_path->dlid = req_msg->alt_local_lid;
1110 alt_path->slid = req_msg->alt_remote_lid;
1111 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1112 alt_path->hop_limit = req_msg->alt_hop_limit;
1113 alt_path->traffic_class = req_msg->alt_traffic_class;
1114 alt_path->reversible = 1;
1115 alt_path->pkey = req_msg->pkey;
1116 alt_path->sl = cm_req_get_alt_sl(req_msg);
1117 alt_path->mtu_selector = IB_SA_EQ;
1118 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1119 alt_path->rate_selector = IB_SA_EQ;
1120 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1121 alt_path->packet_life_time_selector = IB_SA_EQ;
1122 alt_path->packet_life_time =
1123 cm_req_get_alt_local_ack_timeout(req_msg);
1124 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1128 static void cm_format_req_event(struct cm_work *work,
1129 struct cm_id_private *cm_id_priv,
1130 struct ib_cm_id *listen_id)
1132 struct cm_req_msg *req_msg;
1133 struct ib_cm_req_event_param *param;
1135 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1136 param = &work->cm_event.param.req_rcvd;
1137 param->listen_id = listen_id;
1138 param->port = cm_id_priv->av.port->port_num;
1139 param->primary_path = &work->path[0];
1140 if (req_msg->alt_local_lid)
1141 param->alternate_path = &work->path[1];
1143 param->alternate_path = NULL;
1144 param->remote_ca_guid = req_msg->local_ca_guid;
1145 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1146 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1147 param->qp_type = cm_req_get_qp_type(req_msg);
1148 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1149 param->responder_resources = cm_req_get_init_depth(req_msg);
1150 param->initiator_depth = cm_req_get_resp_res(req_msg);
1151 param->local_cm_response_timeout =
1152 cm_req_get_remote_resp_timeout(req_msg);
1153 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1154 param->remote_cm_response_timeout =
1155 cm_req_get_local_resp_timeout(req_msg);
1156 param->retry_count = cm_req_get_retry_count(req_msg);
1157 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1158 param->srq = cm_req_get_srq(req_msg);
1159 work->cm_event.private_data = &req_msg->private_data;
1162 static void cm_process_work(struct cm_id_private *cm_id_priv,
1163 struct cm_work *work)
1165 unsigned long flags;
1168 /* We will typically only have the current event to report. */
1169 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1172 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1173 spin_lock_irqsave(&cm_id_priv->lock, flags);
1174 work = cm_dequeue_work(cm_id_priv);
1175 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1177 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1181 cm_deref_id(cm_id_priv);
1183 cm_destroy_id(&cm_id_priv->id, ret);
1186 static void cm_format_mra(struct cm_mra_msg *mra_msg,
1187 struct cm_id_private *cm_id_priv,
1188 enum cm_msg_response msg_mraed, u8 service_timeout,
1189 const void *private_data, u8 private_data_len)
1191 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1192 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1193 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1194 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1195 cm_mra_set_service_timeout(mra_msg, service_timeout);
1197 if (private_data && private_data_len)
1198 memcpy(mra_msg->private_data, private_data, private_data_len);
1201 static void cm_format_rej(struct cm_rej_msg *rej_msg,
1202 struct cm_id_private *cm_id_priv,
1203 enum ib_cm_rej_reason reason,
1206 const void *private_data,
1207 u8 private_data_len)
1209 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1210 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1212 switch(cm_id_priv->id.state) {
1213 case IB_CM_REQ_RCVD:
1214 rej_msg->local_comm_id = 0;
1215 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1217 case IB_CM_MRA_REQ_SENT:
1218 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1219 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1221 case IB_CM_REP_RCVD:
1222 case IB_CM_MRA_REP_SENT:
1223 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1224 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1227 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1228 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1232 rej_msg->reason = cpu_to_be16(reason);
1233 if (ari && ari_length) {
1234 cm_rej_set_reject_info_len(rej_msg, ari_length);
1235 memcpy(rej_msg->ari, ari, ari_length);
1238 if (private_data && private_data_len)
1239 memcpy(rej_msg->private_data, private_data, private_data_len);
1242 static void cm_dup_req_handler(struct cm_work *work,
1243 struct cm_id_private *cm_id_priv)
1245 struct ib_mad_send_buf *msg = NULL;
1246 unsigned long flags;
1249 /* Quick state check to discard duplicate REQs. */
1250 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1253 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1257 spin_lock_irqsave(&cm_id_priv->lock, flags);
1258 switch (cm_id_priv->id.state) {
1259 case IB_CM_MRA_REQ_SENT:
1260 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1261 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1262 cm_id_priv->private_data,
1263 cm_id_priv->private_data_len);
1265 case IB_CM_TIMEWAIT:
1266 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1267 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1272 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1274 ret = ib_post_send_mad(msg, NULL);
1279 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1280 free: cm_free_msg(msg);
1283 static struct cm_id_private * cm_match_req(struct cm_work *work,
1284 struct cm_id_private *cm_id_priv)
1286 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1287 struct cm_timewait_info *timewait_info;
1288 struct cm_req_msg *req_msg;
1289 unsigned long flags;
1291 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1293 /* Check for duplicate REQ and stale connections. */
1294 spin_lock_irqsave(&cm.lock, flags);
1295 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1297 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1299 if (timewait_info) {
1300 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1301 timewait_info->work.remote_id);
1302 spin_unlock_irqrestore(&cm.lock, flags);
1303 if (cur_cm_id_priv) {
1304 cm_dup_req_handler(work, cur_cm_id_priv);
1305 cm_deref_id(cur_cm_id_priv);
1307 cm_issue_rej(work->port, work->mad_recv_wc,
1308 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1313 /* Find matching listen request. */
1314 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
1315 req_msg->service_id,
1316 req_msg->private_data);
1317 if (!listen_cm_id_priv) {
1318 spin_unlock_irqrestore(&cm.lock, flags);
1319 cm_issue_rej(work->port, work->mad_recv_wc,
1320 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1324 atomic_inc(&listen_cm_id_priv->refcount);
1325 atomic_inc(&cm_id_priv->refcount);
1326 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1327 atomic_inc(&cm_id_priv->work_count);
1328 spin_unlock_irqrestore(&cm.lock, flags);
1329 return listen_cm_id_priv;
1331 error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1335 static int cm_req_handler(struct cm_work *work)
1337 struct ib_cm_id *cm_id;
1338 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1339 struct cm_req_msg *req_msg;
1342 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1344 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
1346 return PTR_ERR(cm_id);
1348 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1349 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1350 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
1351 work->mad_recv_wc->recv_buf.grh,
1353 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1355 if (IS_ERR(cm_id_priv->timewait_info)) {
1356 ret = PTR_ERR(cm_id_priv->timewait_info);
1359 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1360 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1361 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1363 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1364 if (!listen_cm_id_priv) {
1369 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1370 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1371 cm_id_priv->id.service_id = req_msg->service_id;
1372 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
1374 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1375 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1378 if (req_msg->alt_local_lid) {
1379 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1383 cm_id_priv->tid = req_msg->hdr.tid;
1384 cm_id_priv->timeout_ms = cm_convert_to_ms(
1385 cm_req_get_local_resp_timeout(req_msg));
1386 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1387 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1388 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1389 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1390 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1391 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1392 cm_id_priv->local_ack_timeout =
1393 cm_req_get_primary_local_ack_timeout(req_msg);
1394 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1395 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1396 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
1398 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1399 cm_process_work(cm_id_priv, work);
1400 cm_deref_id(listen_cm_id_priv);
1403 error3: atomic_dec(&cm_id_priv->refcount);
1404 cm_deref_id(listen_cm_id_priv);
1405 cm_cleanup_timewait(cm_id_priv->timewait_info);
1406 error2: kfree(cm_id_priv->timewait_info);
1407 cm_id_priv->timewait_info = NULL;
1408 error1: ib_destroy_cm_id(&cm_id_priv->id);
1412 static void cm_format_rep(struct cm_rep_msg *rep_msg,
1413 struct cm_id_private *cm_id_priv,
1414 struct ib_cm_rep_param *param)
1416 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1417 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1418 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1419 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1420 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1421 rep_msg->resp_resources = param->responder_resources;
1422 rep_msg->initiator_depth = param->initiator_depth;
1423 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1424 cm_rep_set_failover(rep_msg, param->failover_accepted);
1425 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1426 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1427 cm_rep_set_srq(rep_msg, param->srq);
1428 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1430 if (param->private_data && param->private_data_len)
1431 memcpy(rep_msg->private_data, param->private_data,
1432 param->private_data_len);
1435 int ib_send_cm_rep(struct ib_cm_id *cm_id,
1436 struct ib_cm_rep_param *param)
1438 struct cm_id_private *cm_id_priv;
1439 struct ib_mad_send_buf *msg;
1440 struct cm_rep_msg *rep_msg;
1441 unsigned long flags;
1444 if (param->private_data &&
1445 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1448 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1449 spin_lock_irqsave(&cm_id_priv->lock, flags);
1450 if (cm_id->state != IB_CM_REQ_RCVD &&
1451 cm_id->state != IB_CM_MRA_REQ_SENT) {
1456 ret = cm_alloc_msg(cm_id_priv, &msg);
1460 rep_msg = (struct cm_rep_msg *) msg->mad;
1461 cm_format_rep(rep_msg, cm_id_priv, param);
1462 msg->timeout_ms = cm_id_priv->timeout_ms;
1463 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1465 ret = ib_post_send_mad(msg, NULL);
1467 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1472 cm_id->state = IB_CM_REP_SENT;
1473 cm_id_priv->msg = msg;
1474 cm_id_priv->initiator_depth = param->initiator_depth;
1475 cm_id_priv->responder_resources = param->responder_resources;
1476 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1477 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1479 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1482 EXPORT_SYMBOL(ib_send_cm_rep);
1484 static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1485 struct cm_id_private *cm_id_priv,
1486 const void *private_data,
1487 u8 private_data_len)
1489 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1490 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1491 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1493 if (private_data && private_data_len)
1494 memcpy(rtu_msg->private_data, private_data, private_data_len);
1497 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1498 const void *private_data,
1499 u8 private_data_len)
1501 struct cm_id_private *cm_id_priv;
1502 struct ib_mad_send_buf *msg;
1503 unsigned long flags;
1507 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1510 data = cm_copy_private_data(private_data, private_data_len);
1512 return PTR_ERR(data);
1514 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1515 spin_lock_irqsave(&cm_id_priv->lock, flags);
1516 if (cm_id->state != IB_CM_REP_RCVD &&
1517 cm_id->state != IB_CM_MRA_REP_SENT) {
1522 ret = cm_alloc_msg(cm_id_priv, &msg);
1526 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1527 private_data, private_data_len);
1529 ret = ib_post_send_mad(msg, NULL);
1531 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1537 cm_id->state = IB_CM_ESTABLISHED;
1538 cm_set_private_data(cm_id_priv, data, private_data_len);
1539 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1542 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1546 EXPORT_SYMBOL(ib_send_cm_rtu);
1548 static void cm_format_rep_event(struct cm_work *work)
1550 struct cm_rep_msg *rep_msg;
1551 struct ib_cm_rep_event_param *param;
1553 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1554 param = &work->cm_event.param.rep_rcvd;
1555 param->remote_ca_guid = rep_msg->local_ca_guid;
1556 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1557 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1558 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1559 param->responder_resources = rep_msg->initiator_depth;
1560 param->initiator_depth = rep_msg->resp_resources;
1561 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1562 param->failover_accepted = cm_rep_get_failover(rep_msg);
1563 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1564 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1565 param->srq = cm_rep_get_srq(rep_msg);
1566 work->cm_event.private_data = &rep_msg->private_data;
1569 static void cm_dup_rep_handler(struct cm_work *work)
1571 struct cm_id_private *cm_id_priv;
1572 struct cm_rep_msg *rep_msg;
1573 struct ib_mad_send_buf *msg = NULL;
1574 unsigned long flags;
1577 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1578 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1579 rep_msg->local_comm_id);
1583 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1587 spin_lock_irqsave(&cm_id_priv->lock, flags);
1588 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1589 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1590 cm_id_priv->private_data,
1591 cm_id_priv->private_data_len);
1592 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1593 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1594 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1595 cm_id_priv->private_data,
1596 cm_id_priv->private_data_len);
1599 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1601 ret = ib_post_send_mad(msg, NULL);
1606 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1607 free: cm_free_msg(msg);
1608 deref: cm_deref_id(cm_id_priv);
1611 static int cm_rep_handler(struct cm_work *work)
1613 struct cm_id_private *cm_id_priv;
1614 struct cm_rep_msg *rep_msg;
1615 unsigned long flags;
1618 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1619 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1621 cm_dup_rep_handler(work);
1625 cm_format_rep_event(work);
1627 spin_lock_irqsave(&cm_id_priv->lock, flags);
1628 switch (cm_id_priv->id.state) {
1629 case IB_CM_REQ_SENT:
1630 case IB_CM_MRA_REQ_RCVD:
1633 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1638 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1639 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1640 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1642 spin_lock(&cm.lock);
1643 /* Check for duplicate REP. */
1644 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
1645 spin_unlock(&cm.lock);
1646 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1650 /* Check for a stale connection. */
1651 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
1652 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1653 &cm.remote_id_table);
1654 cm_id_priv->timewait_info->inserted_remote_id = 0;
1655 spin_unlock(&cm.lock);
1656 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1657 cm_issue_rej(work->port, work->mad_recv_wc,
1658 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1663 spin_unlock(&cm.lock);
1665 cm_id_priv->id.state = IB_CM_REP_RCVD;
1666 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1667 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1668 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1669 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1670 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1671 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1673 /* todo: handle peer_to_peer */
1675 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1676 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1678 list_add_tail(&work->list, &cm_id_priv->work_list);
1679 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1682 cm_process_work(cm_id_priv, work);
1684 cm_deref_id(cm_id_priv);
1688 cm_deref_id(cm_id_priv);
1692 static int cm_establish_handler(struct cm_work *work)
1694 struct cm_id_private *cm_id_priv;
1695 unsigned long flags;
1698 /* See comment in ib_cm_establish about lookup. */
1699 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1703 spin_lock_irqsave(&cm_id_priv->lock, flags);
1704 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1705 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1709 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1710 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1712 list_add_tail(&work->list, &cm_id_priv->work_list);
1713 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1716 cm_process_work(cm_id_priv, work);
1718 cm_deref_id(cm_id_priv);
1721 cm_deref_id(cm_id_priv);
1725 static int cm_rtu_handler(struct cm_work *work)
1727 struct cm_id_private *cm_id_priv;
1728 struct cm_rtu_msg *rtu_msg;
1729 unsigned long flags;
1732 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1733 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1734 rtu_msg->local_comm_id);
1738 work->cm_event.private_data = &rtu_msg->private_data;
1740 spin_lock_irqsave(&cm_id_priv->lock, flags);
1741 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1742 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1743 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1746 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1748 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1749 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1751 list_add_tail(&work->list, &cm_id_priv->work_list);
1752 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1755 cm_process_work(cm_id_priv, work);
1757 cm_deref_id(cm_id_priv);
1760 cm_deref_id(cm_id_priv);
1764 static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1765 struct cm_id_private *cm_id_priv,
1766 const void *private_data,
1767 u8 private_data_len)
1769 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1770 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1771 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1772 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1773 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1775 if (private_data && private_data_len)
1776 memcpy(dreq_msg->private_data, private_data, private_data_len);
1779 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1780 const void *private_data,
1781 u8 private_data_len)
1783 struct cm_id_private *cm_id_priv;
1784 struct ib_mad_send_buf *msg;
1785 unsigned long flags;
1788 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1791 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1792 spin_lock_irqsave(&cm_id_priv->lock, flags);
1793 if (cm_id->state != IB_CM_ESTABLISHED) {
1798 ret = cm_alloc_msg(cm_id_priv, &msg);
1800 cm_enter_timewait(cm_id_priv);
1804 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1805 private_data, private_data_len);
1806 msg->timeout_ms = cm_id_priv->timeout_ms;
1807 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1809 ret = ib_post_send_mad(msg, NULL);
1811 cm_enter_timewait(cm_id_priv);
1812 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1817 cm_id->state = IB_CM_DREQ_SENT;
1818 cm_id_priv->msg = msg;
1819 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1822 EXPORT_SYMBOL(ib_send_cm_dreq);
1824 static void cm_format_drep(struct cm_drep_msg *drep_msg,
1825 struct cm_id_private *cm_id_priv,
1826 const void *private_data,
1827 u8 private_data_len)
1829 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1830 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1831 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1833 if (private_data && private_data_len)
1834 memcpy(drep_msg->private_data, private_data, private_data_len);
1837 int ib_send_cm_drep(struct ib_cm_id *cm_id,
1838 const void *private_data,
1839 u8 private_data_len)
1841 struct cm_id_private *cm_id_priv;
1842 struct ib_mad_send_buf *msg;
1843 unsigned long flags;
1847 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1850 data = cm_copy_private_data(private_data, private_data_len);
1852 return PTR_ERR(data);
1854 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1855 spin_lock_irqsave(&cm_id_priv->lock, flags);
1856 if (cm_id->state != IB_CM_DREQ_RCVD) {
1857 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1862 cm_set_private_data(cm_id_priv, data, private_data_len);
1863 cm_enter_timewait(cm_id_priv);
1865 ret = cm_alloc_msg(cm_id_priv, &msg);
1869 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1870 private_data, private_data_len);
1872 ret = ib_post_send_mad(msg, NULL);
1874 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1879 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1882 EXPORT_SYMBOL(ib_send_cm_drep);
1884 static int cm_dreq_handler(struct cm_work *work)
1886 struct cm_id_private *cm_id_priv;
1887 struct cm_dreq_msg *dreq_msg;
1888 struct ib_mad_send_buf *msg = NULL;
1889 unsigned long flags;
1892 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1893 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1894 dreq_msg->local_comm_id);
1898 work->cm_event.private_data = &dreq_msg->private_data;
1900 spin_lock_irqsave(&cm_id_priv->lock, flags);
1901 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1904 switch (cm_id_priv->id.state) {
1905 case IB_CM_REP_SENT:
1906 case IB_CM_DREQ_SENT:
1907 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1909 case IB_CM_ESTABLISHED:
1910 case IB_CM_MRA_REP_RCVD:
1912 case IB_CM_TIMEWAIT:
1913 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1916 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1917 cm_id_priv->private_data,
1918 cm_id_priv->private_data_len);
1919 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1921 if (ib_post_send_mad(msg, NULL))
1927 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1928 cm_id_priv->tid = dreq_msg->hdr.tid;
1929 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1931 list_add_tail(&work->list, &cm_id_priv->work_list);
1932 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1935 cm_process_work(cm_id_priv, work);
1937 cm_deref_id(cm_id_priv);
1940 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1941 deref: cm_deref_id(cm_id_priv);
1945 static int cm_drep_handler(struct cm_work *work)
1947 struct cm_id_private *cm_id_priv;
1948 struct cm_drep_msg *drep_msg;
1949 unsigned long flags;
1952 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
1953 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
1954 drep_msg->local_comm_id);
1958 work->cm_event.private_data = &drep_msg->private_data;
1960 spin_lock_irqsave(&cm_id_priv->lock, flags);
1961 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
1962 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
1963 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1966 cm_enter_timewait(cm_id_priv);
1968 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1969 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1971 list_add_tail(&work->list, &cm_id_priv->work_list);
1972 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1975 cm_process_work(cm_id_priv, work);
1977 cm_deref_id(cm_id_priv);
1980 cm_deref_id(cm_id_priv);
1984 int ib_send_cm_rej(struct ib_cm_id *cm_id,
1985 enum ib_cm_rej_reason reason,
1988 const void *private_data,
1989 u8 private_data_len)
1991 struct cm_id_private *cm_id_priv;
1992 struct ib_mad_send_buf *msg;
1993 unsigned long flags;
1996 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
1997 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2000 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2002 spin_lock_irqsave(&cm_id_priv->lock, flags);
2003 switch (cm_id->state) {
2004 case IB_CM_REQ_SENT:
2005 case IB_CM_MRA_REQ_RCVD:
2006 case IB_CM_REQ_RCVD:
2007 case IB_CM_MRA_REQ_SENT:
2008 case IB_CM_REP_RCVD:
2009 case IB_CM_MRA_REP_SENT:
2010 ret = cm_alloc_msg(cm_id_priv, &msg);
2012 cm_format_rej((struct cm_rej_msg *) msg->mad,
2013 cm_id_priv, reason, ari, ari_length,
2014 private_data, private_data_len);
2016 cm_reset_to_idle(cm_id_priv);
2018 case IB_CM_REP_SENT:
2019 case IB_CM_MRA_REP_RCVD:
2020 ret = cm_alloc_msg(cm_id_priv, &msg);
2022 cm_format_rej((struct cm_rej_msg *) msg->mad,
2023 cm_id_priv, reason, ari, ari_length,
2024 private_data, private_data_len);
2026 cm_enter_timewait(cm_id_priv);
2036 ret = ib_post_send_mad(msg, NULL);
2040 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2043 EXPORT_SYMBOL(ib_send_cm_rej);
2045 static void cm_format_rej_event(struct cm_work *work)
2047 struct cm_rej_msg *rej_msg;
2048 struct ib_cm_rej_event_param *param;
2050 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2051 param = &work->cm_event.param.rej_rcvd;
2052 param->ari = rej_msg->ari;
2053 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
2054 param->reason = __be16_to_cpu(rej_msg->reason);
2055 work->cm_event.private_data = &rej_msg->private_data;
2058 static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2060 struct cm_timewait_info *timewait_info;
2061 struct cm_id_private *cm_id_priv;
2062 unsigned long flags;
2065 remote_id = rej_msg->local_comm_id;
2067 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
2068 spin_lock_irqsave(&cm.lock, flags);
2069 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
2071 if (!timewait_info) {
2072 spin_unlock_irqrestore(&cm.lock, flags);
2075 cm_id_priv = idr_find(&cm.local_id_table,
2076 (__force int) timewait_info->work.local_id);
2078 if (cm_id_priv->id.remote_id == remote_id)
2079 atomic_inc(&cm_id_priv->refcount);
2083 spin_unlock_irqrestore(&cm.lock, flags);
2084 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2085 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2087 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2092 static int cm_rej_handler(struct cm_work *work)
2094 struct cm_id_private *cm_id_priv;
2095 struct cm_rej_msg *rej_msg;
2096 unsigned long flags;
2099 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2100 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2104 cm_format_rej_event(work);
2106 spin_lock_irqsave(&cm_id_priv->lock, flags);
2107 switch (cm_id_priv->id.state) {
2108 case IB_CM_REQ_SENT:
2109 case IB_CM_MRA_REQ_RCVD:
2110 case IB_CM_REP_SENT:
2111 case IB_CM_MRA_REP_RCVD:
2112 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2114 case IB_CM_REQ_RCVD:
2115 case IB_CM_MRA_REQ_SENT:
2116 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
2117 cm_enter_timewait(cm_id_priv);
2119 cm_reset_to_idle(cm_id_priv);
2121 case IB_CM_DREQ_SENT:
2122 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2124 case IB_CM_REP_RCVD:
2125 case IB_CM_MRA_REP_SENT:
2126 case IB_CM_ESTABLISHED:
2127 cm_enter_timewait(cm_id_priv);
2130 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2135 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2137 list_add_tail(&work->list, &cm_id_priv->work_list);
2138 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2141 cm_process_work(cm_id_priv, work);
2143 cm_deref_id(cm_id_priv);
2146 cm_deref_id(cm_id_priv);
2150 int ib_send_cm_mra(struct ib_cm_id *cm_id,
2152 const void *private_data,
2153 u8 private_data_len)
2155 struct cm_id_private *cm_id_priv;
2156 struct ib_mad_send_buf *msg;
2158 unsigned long flags;
2161 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2164 data = cm_copy_private_data(private_data, private_data_len);
2166 return PTR_ERR(data);
2168 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2170 spin_lock_irqsave(&cm_id_priv->lock, flags);
2171 switch(cm_id_priv->id.state) {
2172 case IB_CM_REQ_RCVD:
2173 ret = cm_alloc_msg(cm_id_priv, &msg);
2177 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2178 CM_MSG_RESPONSE_REQ, service_timeout,
2179 private_data, private_data_len);
2180 ret = ib_post_send_mad(msg, NULL);
2183 cm_id->state = IB_CM_MRA_REQ_SENT;
2185 case IB_CM_REP_RCVD:
2186 ret = cm_alloc_msg(cm_id_priv, &msg);
2190 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2191 CM_MSG_RESPONSE_REP, service_timeout,
2192 private_data, private_data_len);
2193 ret = ib_post_send_mad(msg, NULL);
2196 cm_id->state = IB_CM_MRA_REP_SENT;
2198 case IB_CM_ESTABLISHED:
2199 ret = cm_alloc_msg(cm_id_priv, &msg);
2203 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2204 CM_MSG_RESPONSE_OTHER, service_timeout,
2205 private_data, private_data_len);
2206 ret = ib_post_send_mad(msg, NULL);
2209 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2215 cm_id_priv->service_timeout = service_timeout;
2216 cm_set_private_data(cm_id_priv, data, private_data_len);
2217 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2220 error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2224 error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2229 EXPORT_SYMBOL(ib_send_cm_mra);
2231 static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2233 switch (cm_mra_get_msg_mraed(mra_msg)) {
2234 case CM_MSG_RESPONSE_REQ:
2235 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2236 case CM_MSG_RESPONSE_REP:
2237 case CM_MSG_RESPONSE_OTHER:
2238 return cm_acquire_id(mra_msg->remote_comm_id,
2239 mra_msg->local_comm_id);
2245 static int cm_mra_handler(struct cm_work *work)
2247 struct cm_id_private *cm_id_priv;
2248 struct cm_mra_msg *mra_msg;
2249 unsigned long flags;
2252 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2253 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2257 work->cm_event.private_data = &mra_msg->private_data;
2258 work->cm_event.param.mra_rcvd.service_timeout =
2259 cm_mra_get_service_timeout(mra_msg);
2260 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2261 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2263 spin_lock_irqsave(&cm_id_priv->lock, flags);
2264 switch (cm_id_priv->id.state) {
2265 case IB_CM_REQ_SENT:
2266 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2267 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2268 cm_id_priv->msg, timeout))
2270 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2272 case IB_CM_REP_SENT:
2273 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2274 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2275 cm_id_priv->msg, timeout))
2277 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2279 case IB_CM_ESTABLISHED:
2280 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2281 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2282 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2283 cm_id_priv->msg, timeout))
2285 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2291 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2292 cm_id_priv->id.state;
2293 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2295 list_add_tail(&work->list, &cm_id_priv->work_list);
2296 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2299 cm_process_work(cm_id_priv, work);
2301 cm_deref_id(cm_id_priv);
2304 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2305 cm_deref_id(cm_id_priv);
2309 static void cm_format_lap(struct cm_lap_msg *lap_msg,
2310 struct cm_id_private *cm_id_priv,
2311 struct ib_sa_path_rec *alternate_path,
2312 const void *private_data,
2313 u8 private_data_len)
2315 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2316 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2317 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2318 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2319 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2320 /* todo: need remote CM response timeout */
2321 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2322 lap_msg->alt_local_lid = alternate_path->slid;
2323 lap_msg->alt_remote_lid = alternate_path->dlid;
2324 lap_msg->alt_local_gid = alternate_path->sgid;
2325 lap_msg->alt_remote_gid = alternate_path->dgid;
2326 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2327 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2328 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2329 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2330 cm_lap_set_sl(lap_msg, alternate_path->sl);
2331 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2332 cm_lap_set_local_ack_timeout(lap_msg,
2333 min(31, alternate_path->packet_life_time + 1));
2335 if (private_data && private_data_len)
2336 memcpy(lap_msg->private_data, private_data, private_data_len);
2339 int ib_send_cm_lap(struct ib_cm_id *cm_id,
2340 struct ib_sa_path_rec *alternate_path,
2341 const void *private_data,
2342 u8 private_data_len)
2344 struct cm_id_private *cm_id_priv;
2345 struct ib_mad_send_buf *msg;
2346 unsigned long flags;
2349 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2352 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2353 spin_lock_irqsave(&cm_id_priv->lock, flags);
2354 if (cm_id->state != IB_CM_ESTABLISHED ||
2355 cm_id->lap_state != IB_CM_LAP_IDLE) {
2360 ret = cm_alloc_msg(cm_id_priv, &msg);
2364 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2365 alternate_path, private_data, private_data_len);
2366 msg->timeout_ms = cm_id_priv->timeout_ms;
2367 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2369 ret = ib_post_send_mad(msg, NULL);
2371 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2376 cm_id->lap_state = IB_CM_LAP_SENT;
2377 cm_id_priv->msg = msg;
2379 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2382 EXPORT_SYMBOL(ib_send_cm_lap);
2384 static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2385 struct cm_lap_msg *lap_msg)
2387 memset(path, 0, sizeof *path);
2388 path->dgid = lap_msg->alt_local_gid;
2389 path->sgid = lap_msg->alt_remote_gid;
2390 path->dlid = lap_msg->alt_local_lid;
2391 path->slid = lap_msg->alt_remote_lid;
2392 path->flow_label = cm_lap_get_flow_label(lap_msg);
2393 path->hop_limit = lap_msg->alt_hop_limit;
2394 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2395 path->reversible = 1;
2396 /* pkey is same as in REQ */
2397 path->sl = cm_lap_get_sl(lap_msg);
2398 path->mtu_selector = IB_SA_EQ;
2399 /* mtu is same as in REQ */
2400 path->rate_selector = IB_SA_EQ;
2401 path->rate = cm_lap_get_packet_rate(lap_msg);
2402 path->packet_life_time_selector = IB_SA_EQ;
2403 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2404 path->packet_life_time -= (path->packet_life_time > 0);
2407 static int cm_lap_handler(struct cm_work *work)
2409 struct cm_id_private *cm_id_priv;
2410 struct cm_lap_msg *lap_msg;
2411 struct ib_cm_lap_event_param *param;
2412 struct ib_mad_send_buf *msg = NULL;
2413 unsigned long flags;
2416 /* todo: verify LAP request and send reject APR if invalid. */
2417 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2418 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2419 lap_msg->local_comm_id);
2423 param = &work->cm_event.param.lap_rcvd;
2424 param->alternate_path = &work->path[0];
2425 cm_format_path_from_lap(param->alternate_path, lap_msg);
2426 work->cm_event.private_data = &lap_msg->private_data;
2428 spin_lock_irqsave(&cm_id_priv->lock, flags);
2429 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2432 switch (cm_id_priv->id.lap_state) {
2433 case IB_CM_LAP_IDLE:
2435 case IB_CM_MRA_LAP_SENT:
2436 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2439 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2440 CM_MSG_RESPONSE_OTHER,
2441 cm_id_priv->service_timeout,
2442 cm_id_priv->private_data,
2443 cm_id_priv->private_data_len);
2444 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2446 if (ib_post_send_mad(msg, NULL))
2453 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2454 cm_id_priv->tid = lap_msg->hdr.tid;
2455 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2457 list_add_tail(&work->list, &cm_id_priv->work_list);
2458 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2461 cm_process_work(cm_id_priv, work);
2463 cm_deref_id(cm_id_priv);
2466 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2467 deref: cm_deref_id(cm_id_priv);
2471 static void cm_format_apr(struct cm_apr_msg *apr_msg,
2472 struct cm_id_private *cm_id_priv,
2473 enum ib_cm_apr_status status,
2476 const void *private_data,
2477 u8 private_data_len)
2479 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2480 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2481 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2482 apr_msg->ap_status = (u8) status;
2484 if (info && info_length) {
2485 apr_msg->info_length = info_length;
2486 memcpy(apr_msg->info, info, info_length);
2489 if (private_data && private_data_len)
2490 memcpy(apr_msg->private_data, private_data, private_data_len);
2493 int ib_send_cm_apr(struct ib_cm_id *cm_id,
2494 enum ib_cm_apr_status status,
2497 const void *private_data,
2498 u8 private_data_len)
2500 struct cm_id_private *cm_id_priv;
2501 struct ib_mad_send_buf *msg;
2502 unsigned long flags;
2505 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2506 (info && info_length > IB_CM_APR_INFO_LENGTH))
2509 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2510 spin_lock_irqsave(&cm_id_priv->lock, flags);
2511 if (cm_id->state != IB_CM_ESTABLISHED ||
2512 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2513 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2518 ret = cm_alloc_msg(cm_id_priv, &msg);
2522 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2523 info, info_length, private_data, private_data_len);
2524 ret = ib_post_send_mad(msg, NULL);
2526 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2531 cm_id->lap_state = IB_CM_LAP_IDLE;
2532 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2535 EXPORT_SYMBOL(ib_send_cm_apr);
2537 static int cm_apr_handler(struct cm_work *work)
2539 struct cm_id_private *cm_id_priv;
2540 struct cm_apr_msg *apr_msg;
2541 unsigned long flags;
2544 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2545 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2546 apr_msg->local_comm_id);
2548 return -EINVAL; /* Unmatched reply. */
2550 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2551 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2552 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2553 work->cm_event.private_data = &apr_msg->private_data;
2555 spin_lock_irqsave(&cm_id_priv->lock, flags);
2556 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2557 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2558 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2559 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2562 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
2563 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2564 cm_id_priv->msg = NULL;
2566 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2568 list_add_tail(&work->list, &cm_id_priv->work_list);
2569 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2572 cm_process_work(cm_id_priv, work);
2574 cm_deref_id(cm_id_priv);
2577 cm_deref_id(cm_id_priv);
2581 static int cm_timewait_handler(struct cm_work *work)
2583 struct cm_timewait_info *timewait_info;
2584 struct cm_id_private *cm_id_priv;
2585 unsigned long flags;
2588 timewait_info = (struct cm_timewait_info *)work;
2589 cm_cleanup_timewait(timewait_info);
2591 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2592 timewait_info->work.remote_id);
2596 spin_lock_irqsave(&cm_id_priv->lock, flags);
2597 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2598 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2599 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2602 cm_id_priv->id.state = IB_CM_IDLE;
2603 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2605 list_add_tail(&work->list, &cm_id_priv->work_list);
2606 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2609 cm_process_work(cm_id_priv, work);
2611 cm_deref_id(cm_id_priv);
2614 cm_deref_id(cm_id_priv);
2618 static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2619 struct cm_id_private *cm_id_priv,
2620 struct ib_cm_sidr_req_param *param)
2622 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2623 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2624 sidr_req_msg->request_id = cm_id_priv->id.local_id;
2625 sidr_req_msg->pkey = cpu_to_be16(param->path->pkey);
2626 sidr_req_msg->service_id = param->service_id;
2628 if (param->private_data && param->private_data_len)
2629 memcpy(sidr_req_msg->private_data, param->private_data,
2630 param->private_data_len);
2633 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2634 struct ib_cm_sidr_req_param *param)
2636 struct cm_id_private *cm_id_priv;
2637 struct ib_mad_send_buf *msg;
2638 unsigned long flags;
2641 if (!param->path || (param->private_data &&
2642 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2645 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2646 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2650 cm_id->service_id = param->service_id;
2651 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
2652 cm_id_priv->timeout_ms = param->timeout_ms;
2653 cm_id_priv->max_cm_retries = param->max_cm_retries;
2654 ret = cm_alloc_msg(cm_id_priv, &msg);
2658 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2660 msg->timeout_ms = cm_id_priv->timeout_ms;
2661 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2663 spin_lock_irqsave(&cm_id_priv->lock, flags);
2664 if (cm_id->state == IB_CM_IDLE)
2665 ret = ib_post_send_mad(msg, NULL);
2670 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2674 cm_id->state = IB_CM_SIDR_REQ_SENT;
2675 cm_id_priv->msg = msg;
2676 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2680 EXPORT_SYMBOL(ib_send_cm_sidr_req);
2682 static void cm_format_sidr_req_event(struct cm_work *work,
2683 struct ib_cm_id *listen_id)
2685 struct cm_sidr_req_msg *sidr_req_msg;
2686 struct ib_cm_sidr_req_event_param *param;
2688 sidr_req_msg = (struct cm_sidr_req_msg *)
2689 work->mad_recv_wc->recv_buf.mad;
2690 param = &work->cm_event.param.sidr_req_rcvd;
2691 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
2692 param->listen_id = listen_id;
2693 param->port = work->port->port_num;
2694 work->cm_event.private_data = &sidr_req_msg->private_data;
2697 static int cm_sidr_req_handler(struct cm_work *work)
2699 struct ib_cm_id *cm_id;
2700 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2701 struct cm_sidr_req_msg *sidr_req_msg;
2703 unsigned long flags;
2705 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
2707 return PTR_ERR(cm_id);
2708 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2710 /* Record SGID/SLID and request ID for lookup. */
2711 sidr_req_msg = (struct cm_sidr_req_msg *)
2712 work->mad_recv_wc->recv_buf.mad;
2713 wc = work->mad_recv_wc->wc;
2714 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
2715 cm_id_priv->av.dgid.global.interface_id = 0;
2716 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2717 work->mad_recv_wc->recv_buf.grh,
2719 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2720 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2721 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2722 atomic_inc(&cm_id_priv->work_count);
2724 spin_lock_irqsave(&cm.lock, flags);
2725 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2726 if (cur_cm_id_priv) {
2727 spin_unlock_irqrestore(&cm.lock, flags);
2728 goto out; /* Duplicate message. */
2730 cur_cm_id_priv = cm_find_listen(cm_id->device,
2731 sidr_req_msg->service_id,
2732 sidr_req_msg->private_data);
2733 if (!cur_cm_id_priv) {
2734 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2735 spin_unlock_irqrestore(&cm.lock, flags);
2736 /* todo: reply with no match */
2737 goto out; /* No match. */
2739 atomic_inc(&cur_cm_id_priv->refcount);
2740 spin_unlock_irqrestore(&cm.lock, flags);
2742 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2743 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2744 cm_id_priv->id.service_id = sidr_req_msg->service_id;
2745 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
2747 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2748 cm_process_work(cm_id_priv, work);
2749 cm_deref_id(cur_cm_id_priv);
2752 ib_destroy_cm_id(&cm_id_priv->id);
2756 static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2757 struct cm_id_private *cm_id_priv,
2758 struct ib_cm_sidr_rep_param *param)
2760 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2762 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2763 sidr_rep_msg->status = param->status;
2764 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2765 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2766 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2768 if (param->info && param->info_length)
2769 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2771 if (param->private_data && param->private_data_len)
2772 memcpy(sidr_rep_msg->private_data, param->private_data,
2773 param->private_data_len);
2776 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2777 struct ib_cm_sidr_rep_param *param)
2779 struct cm_id_private *cm_id_priv;
2780 struct ib_mad_send_buf *msg;
2781 unsigned long flags;
2784 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2785 (param->private_data &&
2786 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2789 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2790 spin_lock_irqsave(&cm_id_priv->lock, flags);
2791 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2796 ret = cm_alloc_msg(cm_id_priv, &msg);
2800 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2802 ret = ib_post_send_mad(msg, NULL);
2804 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2808 cm_id->state = IB_CM_IDLE;
2809 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2811 spin_lock_irqsave(&cm.lock, flags);
2812 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2813 spin_unlock_irqrestore(&cm.lock, flags);
2816 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2819 EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2821 static void cm_format_sidr_rep_event(struct cm_work *work)
2823 struct cm_sidr_rep_msg *sidr_rep_msg;
2824 struct ib_cm_sidr_rep_event_param *param;
2826 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2827 work->mad_recv_wc->recv_buf.mad;
2828 param = &work->cm_event.param.sidr_rep_rcvd;
2829 param->status = sidr_rep_msg->status;
2830 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2831 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2832 param->info = &sidr_rep_msg->info;
2833 param->info_len = sidr_rep_msg->info_length;
2834 work->cm_event.private_data = &sidr_rep_msg->private_data;
2837 static int cm_sidr_rep_handler(struct cm_work *work)
2839 struct cm_sidr_rep_msg *sidr_rep_msg;
2840 struct cm_id_private *cm_id_priv;
2841 unsigned long flags;
2843 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2844 work->mad_recv_wc->recv_buf.mad;
2845 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2847 return -EINVAL; /* Unmatched reply. */
2849 spin_lock_irqsave(&cm_id_priv->lock, flags);
2850 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2851 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2854 cm_id_priv->id.state = IB_CM_IDLE;
2855 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2856 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2858 cm_format_sidr_rep_event(work);
2859 cm_process_work(cm_id_priv, work);
2862 cm_deref_id(cm_id_priv);
2866 static void cm_process_send_error(struct ib_mad_send_buf *msg,
2867 enum ib_wc_status wc_status)
2869 struct cm_id_private *cm_id_priv;
2870 struct ib_cm_event cm_event;
2871 enum ib_cm_state state;
2872 unsigned long flags;
2875 memset(&cm_event, 0, sizeof cm_event);
2876 cm_id_priv = msg->context[0];
2878 /* Discard old sends or ones without a response. */
2879 spin_lock_irqsave(&cm_id_priv->lock, flags);
2880 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2881 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2885 case IB_CM_REQ_SENT:
2886 case IB_CM_MRA_REQ_RCVD:
2887 cm_reset_to_idle(cm_id_priv);
2888 cm_event.event = IB_CM_REQ_ERROR;
2890 case IB_CM_REP_SENT:
2891 case IB_CM_MRA_REP_RCVD:
2892 cm_reset_to_idle(cm_id_priv);
2893 cm_event.event = IB_CM_REP_ERROR;
2895 case IB_CM_DREQ_SENT:
2896 cm_enter_timewait(cm_id_priv);
2897 cm_event.event = IB_CM_DREQ_ERROR;
2899 case IB_CM_SIDR_REQ_SENT:
2900 cm_id_priv->id.state = IB_CM_IDLE;
2901 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2906 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2907 cm_event.param.send_status = wc_status;
2909 /* No other events can occur on the cm_id at this point. */
2910 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2913 ib_destroy_cm_id(&cm_id_priv->id);
2916 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2920 static void cm_send_handler(struct ib_mad_agent *mad_agent,
2921 struct ib_mad_send_wc *mad_send_wc)
2923 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
2925 switch (mad_send_wc->status) {
2927 case IB_WC_WR_FLUSH_ERR:
2931 if (msg->context[0] && msg->context[1])
2932 cm_process_send_error(msg, mad_send_wc->status);
2939 static void cm_work_handler(void *data)
2941 struct cm_work *work = data;
2944 switch (work->cm_event.event) {
2945 case IB_CM_REQ_RECEIVED:
2946 ret = cm_req_handler(work);
2948 case IB_CM_MRA_RECEIVED:
2949 ret = cm_mra_handler(work);
2951 case IB_CM_REJ_RECEIVED:
2952 ret = cm_rej_handler(work);
2954 case IB_CM_REP_RECEIVED:
2955 ret = cm_rep_handler(work);
2957 case IB_CM_RTU_RECEIVED:
2958 ret = cm_rtu_handler(work);
2960 case IB_CM_USER_ESTABLISHED:
2961 ret = cm_establish_handler(work);
2963 case IB_CM_DREQ_RECEIVED:
2964 ret = cm_dreq_handler(work);
2966 case IB_CM_DREP_RECEIVED:
2967 ret = cm_drep_handler(work);
2969 case IB_CM_SIDR_REQ_RECEIVED:
2970 ret = cm_sidr_req_handler(work);
2972 case IB_CM_SIDR_REP_RECEIVED:
2973 ret = cm_sidr_rep_handler(work);
2975 case IB_CM_LAP_RECEIVED:
2976 ret = cm_lap_handler(work);
2978 case IB_CM_APR_RECEIVED:
2979 ret = cm_apr_handler(work);
2981 case IB_CM_TIMEWAIT_EXIT:
2982 ret = cm_timewait_handler(work);
2992 int ib_cm_establish(struct ib_cm_id *cm_id)
2994 struct cm_id_private *cm_id_priv;
2995 struct cm_work *work;
2996 unsigned long flags;
2999 work = kmalloc(sizeof *work, GFP_ATOMIC);
3003 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3004 spin_lock_irqsave(&cm_id_priv->lock, flags);
3005 switch (cm_id->state)
3007 case IB_CM_REP_SENT:
3008 case IB_CM_MRA_REP_RCVD:
3009 cm_id->state = IB_CM_ESTABLISHED;
3011 case IB_CM_ESTABLISHED:
3018 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3026 * The CM worker thread may try to destroy the cm_id before it
3027 * can execute this work item. To prevent potential deadlock,
3028 * we need to find the cm_id once we're in the context of the
3029 * worker thread, rather than holding a reference on it.
3031 INIT_WORK(&work->work, cm_work_handler, work);
3032 work->local_id = cm_id->local_id;
3033 work->remote_id = cm_id->remote_id;
3034 work->mad_recv_wc = NULL;
3035 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3036 queue_work(cm.wq, &work->work);
3040 EXPORT_SYMBOL(ib_cm_establish);
3042 static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3043 struct ib_mad_recv_wc *mad_recv_wc)
3045 struct cm_work *work;
3046 enum ib_cm_event_type event;
3049 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3050 case CM_REQ_ATTR_ID:
3051 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3052 alt_local_lid != 0);
3053 event = IB_CM_REQ_RECEIVED;
3055 case CM_MRA_ATTR_ID:
3056 event = IB_CM_MRA_RECEIVED;
3058 case CM_REJ_ATTR_ID:
3059 event = IB_CM_REJ_RECEIVED;
3061 case CM_REP_ATTR_ID:
3062 event = IB_CM_REP_RECEIVED;
3064 case CM_RTU_ATTR_ID:
3065 event = IB_CM_RTU_RECEIVED;
3067 case CM_DREQ_ATTR_ID:
3068 event = IB_CM_DREQ_RECEIVED;
3070 case CM_DREP_ATTR_ID:
3071 event = IB_CM_DREP_RECEIVED;
3073 case CM_SIDR_REQ_ATTR_ID:
3074 event = IB_CM_SIDR_REQ_RECEIVED;
3076 case CM_SIDR_REP_ATTR_ID:
3077 event = IB_CM_SIDR_REP_RECEIVED;
3079 case CM_LAP_ATTR_ID:
3081 event = IB_CM_LAP_RECEIVED;
3083 case CM_APR_ATTR_ID:
3084 event = IB_CM_APR_RECEIVED;
3087 ib_free_recv_mad(mad_recv_wc);
3091 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3094 ib_free_recv_mad(mad_recv_wc);
3098 INIT_WORK(&work->work, cm_work_handler, work);
3099 work->cm_event.event = event;
3100 work->mad_recv_wc = mad_recv_wc;
3101 work->port = (struct cm_port *)mad_agent->context;
3102 queue_work(cm.wq, &work->work);
3105 static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3106 struct ib_qp_attr *qp_attr,
3109 unsigned long flags;
3112 spin_lock_irqsave(&cm_id_priv->lock, flags);
3113 switch (cm_id_priv->id.state) {
3114 case IB_CM_REQ_SENT:
3115 case IB_CM_MRA_REQ_RCVD:
3116 case IB_CM_REQ_RCVD:
3117 case IB_CM_MRA_REQ_SENT:
3118 case IB_CM_REP_RCVD:
3119 case IB_CM_MRA_REP_SENT:
3120 case IB_CM_REP_SENT:
3121 case IB_CM_MRA_REP_RCVD:
3122 case IB_CM_ESTABLISHED:
3123 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3124 IB_QP_PKEY_INDEX | IB_QP_PORT;
3125 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE |
3126 IB_ACCESS_REMOTE_WRITE;
3127 if (cm_id_priv->responder_resources)
3128 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ;
3129 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3130 qp_attr->port_num = cm_id_priv->av.port->port_num;
3137 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3141 static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3142 struct ib_qp_attr *qp_attr,
3145 unsigned long flags;
3148 spin_lock_irqsave(&cm_id_priv->lock, flags);
3149 switch (cm_id_priv->id.state) {
3150 case IB_CM_REQ_RCVD:
3151 case IB_CM_MRA_REQ_SENT:
3152 case IB_CM_REP_RCVD:
3153 case IB_CM_MRA_REP_SENT:
3154 case IB_CM_REP_SENT:
3155 case IB_CM_MRA_REP_RCVD:
3156 case IB_CM_ESTABLISHED:
3157 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
3158 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
3159 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3160 qp_attr->path_mtu = cm_id_priv->path_mtu;
3161 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3162 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
3163 if (cm_id_priv->qp_type == IB_QPT_RC) {
3164 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3165 IB_QP_MIN_RNR_TIMER;
3166 qp_attr->max_dest_rd_atomic =
3167 cm_id_priv->responder_resources;
3168 qp_attr->min_rnr_timer = 0;
3170 if (cm_id_priv->alt_av.ah_attr.dlid) {
3171 *qp_attr_mask |= IB_QP_ALT_PATH;
3172 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3173 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3181 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3185 static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3186 struct ib_qp_attr *qp_attr,
3189 unsigned long flags;
3192 spin_lock_irqsave(&cm_id_priv->lock, flags);
3193 switch (cm_id_priv->id.state) {
3194 case IB_CM_REP_RCVD:
3195 case IB_CM_MRA_REP_SENT:
3196 case IB_CM_REP_SENT:
3197 case IB_CM_MRA_REP_RCVD:
3198 case IB_CM_ESTABLISHED:
3199 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
3200 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
3201 if (cm_id_priv->qp_type == IB_QPT_RC) {
3202 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3204 IB_QP_MAX_QP_RD_ATOMIC;
3205 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3206 qp_attr->retry_cnt = cm_id_priv->retry_count;
3207 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3208 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3210 if (cm_id_priv->alt_av.ah_attr.dlid) {
3211 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3212 qp_attr->path_mig_state = IB_MIG_REARM;
3220 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3224 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3225 struct ib_qp_attr *qp_attr,
3228 struct cm_id_private *cm_id_priv;
3231 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3232 switch (qp_attr->qp_state) {
3234 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3237 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3240 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3248 EXPORT_SYMBOL(ib_cm_init_qp_attr);
3250 static void cm_add_one(struct ib_device *device)
3252 struct cm_device *cm_dev;
3253 struct cm_port *port;
3254 struct ib_mad_reg_req reg_req = {
3255 .mgmt_class = IB_MGMT_CLASS_CM,
3256 .mgmt_class_version = IB_CM_CLASS_VERSION
3258 struct ib_port_modify port_modify = {
3259 .set_port_cap_mask = IB_PORT_CM_SUP
3261 unsigned long flags;
3265 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3266 device->phys_port_cnt, GFP_KERNEL);
3270 cm_dev->device = device;
3271 cm_dev->ca_guid = device->node_guid;
3273 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3274 for (i = 1; i <= device->phys_port_cnt; i++) {
3275 port = &cm_dev->port[i-1];
3276 port->cm_dev = cm_dev;
3278 port->mad_agent = ib_register_mad_agent(device, i,
3285 if (IS_ERR(port->mad_agent))
3288 ret = ib_modify_port(device, i, 0, &port_modify);
3292 ib_set_client_data(device, &cm_client, cm_dev);
3294 write_lock_irqsave(&cm.device_lock, flags);
3295 list_add_tail(&cm_dev->list, &cm.device_list);
3296 write_unlock_irqrestore(&cm.device_lock, flags);
3300 ib_unregister_mad_agent(port->mad_agent);
3302 port_modify.set_port_cap_mask = 0;
3303 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3305 port = &cm_dev->port[i-1];
3306 ib_modify_port(device, port->port_num, 0, &port_modify);
3307 ib_unregister_mad_agent(port->mad_agent);
3312 static void cm_remove_one(struct ib_device *device)
3314 struct cm_device *cm_dev;
3315 struct cm_port *port;
3316 struct ib_port_modify port_modify = {
3317 .clr_port_cap_mask = IB_PORT_CM_SUP
3319 unsigned long flags;
3322 cm_dev = ib_get_client_data(device, &cm_client);
3326 write_lock_irqsave(&cm.device_lock, flags);
3327 list_del(&cm_dev->list);
3328 write_unlock_irqrestore(&cm.device_lock, flags);
3330 for (i = 1; i <= device->phys_port_cnt; i++) {
3331 port = &cm_dev->port[i-1];
3332 ib_modify_port(device, port->port_num, 0, &port_modify);
3333 ib_unregister_mad_agent(port->mad_agent);
3338 static int __init ib_cm_init(void)
3342 memset(&cm, 0, sizeof cm);
3343 INIT_LIST_HEAD(&cm.device_list);
3344 rwlock_init(&cm.device_lock);
3345 spin_lock_init(&cm.lock);
3346 cm.listen_service_table = RB_ROOT;
3347 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3348 cm.remote_id_table = RB_ROOT;
3349 cm.remote_qp_table = RB_ROOT;
3350 cm.remote_sidr_table = RB_ROOT;
3351 idr_init(&cm.local_id_table);
3352 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3354 cm.wq = create_workqueue("ib_cm");
3358 ret = ib_register_client(&cm_client);
3364 destroy_workqueue(cm.wq);
3368 static void __exit ib_cm_cleanup(void)
3370 destroy_workqueue(cm.wq);
3371 ib_unregister_client(&cm_client);
3372 idr_destroy(&cm.local_id_table);
3375 module_init(ib_cm_init);
3376 module_exit(ib_cm_cleanup);