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_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num,
258 u16 dlid, u8 sl, u16 src_path_bits)
260 memset(ah_attr, 0, sizeof ah_attr);
261 ah_attr->dlid = dlid;
263 ah_attr->src_path_bits = src_path_bits;
264 ah_attr->port_num = port_num;
267 static void cm_init_av_for_response(struct cm_port *port,
268 struct ib_wc *wc, struct cm_av *av)
271 av->pkey_index = wc->pkey_index;
272 cm_set_ah_attr(&av->ah_attr, port->port_num, wc->slid,
273 wc->sl, wc->dlid_path_bits);
276 static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
278 struct cm_device *cm_dev;
279 struct cm_port *port = NULL;
284 read_lock_irqsave(&cm.device_lock, flags);
285 list_for_each_entry(cm_dev, &cm.device_list, list) {
286 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
288 port = &cm_dev->port[p-1];
292 read_unlock_irqrestore(&cm.device_lock, flags);
297 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
298 be16_to_cpu(path->pkey), &av->pkey_index);
303 cm_set_ah_attr(&av->ah_attr, av->port->port_num,
304 be16_to_cpu(path->dlid), path->sl,
305 be16_to_cpu(path->slid) & 0x7F);
306 av->packet_life_time = path->packet_life_time;
310 static int cm_alloc_id(struct cm_id_private *cm_id_priv)
317 spin_lock_irqsave(&cm.lock, flags);
318 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, next_id++,
319 (__force int *) &cm_id_priv->id.local_id);
320 spin_unlock_irqrestore(&cm.lock, flags);
321 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
325 static void cm_free_id(__be32 local_id)
329 spin_lock_irqsave(&cm.lock, flags);
330 idr_remove(&cm.local_id_table, (__force int) local_id);
331 spin_unlock_irqrestore(&cm.lock, flags);
334 static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
336 struct cm_id_private *cm_id_priv;
338 cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id);
340 if (cm_id_priv->id.remote_id == remote_id)
341 atomic_inc(&cm_id_priv->refcount);
349 static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
351 struct cm_id_private *cm_id_priv;
354 spin_lock_irqsave(&cm.lock, flags);
355 cm_id_priv = cm_get_id(local_id, remote_id);
356 spin_unlock_irqrestore(&cm.lock, flags);
361 static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
365 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
366 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
367 ((unsigned long *) mask)[i];
370 static int cm_compare_data(struct ib_cm_compare_data *src_data,
371 struct ib_cm_compare_data *dst_data)
373 u8 src[IB_CM_COMPARE_SIZE];
374 u8 dst[IB_CM_COMPARE_SIZE];
376 if (!src_data || !dst_data)
379 cm_mask_copy(src, src_data->data, dst_data->mask);
380 cm_mask_copy(dst, dst_data->data, src_data->mask);
381 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
384 static int cm_compare_private_data(u8 *private_data,
385 struct ib_cm_compare_data *dst_data)
387 u8 src[IB_CM_COMPARE_SIZE];
392 cm_mask_copy(src, private_data, dst_data->mask);
393 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
396 static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
398 struct rb_node **link = &cm.listen_service_table.rb_node;
399 struct rb_node *parent = NULL;
400 struct cm_id_private *cur_cm_id_priv;
401 __be64 service_id = cm_id_priv->id.service_id;
402 __be64 service_mask = cm_id_priv->id.service_mask;
407 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
409 data_cmp = cm_compare_data(cm_id_priv->compare_data,
410 cur_cm_id_priv->compare_data);
411 if ((cur_cm_id_priv->id.service_mask & service_id) ==
412 (service_mask & cur_cm_id_priv->id.service_id) &&
413 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
415 return cur_cm_id_priv;
417 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
418 link = &(*link)->rb_left;
419 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
420 link = &(*link)->rb_right;
421 else if (service_id < cur_cm_id_priv->id.service_id)
422 link = &(*link)->rb_left;
423 else if (service_id > cur_cm_id_priv->id.service_id)
424 link = &(*link)->rb_right;
425 else if (data_cmp < 0)
426 link = &(*link)->rb_left;
428 link = &(*link)->rb_right;
430 rb_link_node(&cm_id_priv->service_node, parent, link);
431 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
435 static struct cm_id_private * cm_find_listen(struct ib_device *device,
439 struct rb_node *node = cm.listen_service_table.rb_node;
440 struct cm_id_private *cm_id_priv;
444 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
445 data_cmp = cm_compare_private_data(private_data,
446 cm_id_priv->compare_data);
447 if ((cm_id_priv->id.service_mask & service_id) ==
448 cm_id_priv->id.service_id &&
449 (cm_id_priv->id.device == device) && !data_cmp)
452 if (device < cm_id_priv->id.device)
453 node = node->rb_left;
454 else if (device > cm_id_priv->id.device)
455 node = node->rb_right;
456 else if (service_id < cm_id_priv->id.service_id)
457 node = node->rb_left;
458 else if (service_id > cm_id_priv->id.service_id)
459 node = node->rb_right;
460 else if (data_cmp < 0)
461 node = node->rb_left;
463 node = node->rb_right;
468 static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
471 struct rb_node **link = &cm.remote_id_table.rb_node;
472 struct rb_node *parent = NULL;
473 struct cm_timewait_info *cur_timewait_info;
474 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
475 __be32 remote_id = timewait_info->work.remote_id;
479 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
481 if (remote_id < cur_timewait_info->work.remote_id)
482 link = &(*link)->rb_left;
483 else if (remote_id > cur_timewait_info->work.remote_id)
484 link = &(*link)->rb_right;
485 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
486 link = &(*link)->rb_left;
487 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
488 link = &(*link)->rb_right;
490 return cur_timewait_info;
492 timewait_info->inserted_remote_id = 1;
493 rb_link_node(&timewait_info->remote_id_node, parent, link);
494 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
498 static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
501 struct rb_node *node = cm.remote_id_table.rb_node;
502 struct cm_timewait_info *timewait_info;
505 timewait_info = rb_entry(node, struct cm_timewait_info,
507 if (remote_id < timewait_info->work.remote_id)
508 node = node->rb_left;
509 else if (remote_id > timewait_info->work.remote_id)
510 node = node->rb_right;
511 else if (remote_ca_guid < timewait_info->remote_ca_guid)
512 node = node->rb_left;
513 else if (remote_ca_guid > timewait_info->remote_ca_guid)
514 node = node->rb_right;
516 return timewait_info;
521 static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
524 struct rb_node **link = &cm.remote_qp_table.rb_node;
525 struct rb_node *parent = NULL;
526 struct cm_timewait_info *cur_timewait_info;
527 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
528 __be32 remote_qpn = timewait_info->remote_qpn;
532 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
534 if (remote_qpn < cur_timewait_info->remote_qpn)
535 link = &(*link)->rb_left;
536 else if (remote_qpn > cur_timewait_info->remote_qpn)
537 link = &(*link)->rb_right;
538 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
539 link = &(*link)->rb_left;
540 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
541 link = &(*link)->rb_right;
543 return cur_timewait_info;
545 timewait_info->inserted_remote_qp = 1;
546 rb_link_node(&timewait_info->remote_qp_node, parent, link);
547 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
551 static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
554 struct rb_node **link = &cm.remote_sidr_table.rb_node;
555 struct rb_node *parent = NULL;
556 struct cm_id_private *cur_cm_id_priv;
557 union ib_gid *port_gid = &cm_id_priv->av.dgid;
558 __be32 remote_id = cm_id_priv->id.remote_id;
562 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
564 if (remote_id < cur_cm_id_priv->id.remote_id)
565 link = &(*link)->rb_left;
566 else if (remote_id > cur_cm_id_priv->id.remote_id)
567 link = &(*link)->rb_right;
570 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
573 link = &(*link)->rb_left;
575 link = &(*link)->rb_right;
577 return cur_cm_id_priv;
580 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
581 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
585 static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
586 enum ib_cm_sidr_status status)
588 struct ib_cm_sidr_rep_param param;
590 memset(¶m, 0, sizeof param);
591 param.status = status;
592 ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m);
595 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
596 ib_cm_handler cm_handler,
599 struct cm_id_private *cm_id_priv;
602 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
604 return ERR_PTR(-ENOMEM);
606 cm_id_priv->id.state = IB_CM_IDLE;
607 cm_id_priv->id.device = device;
608 cm_id_priv->id.cm_handler = cm_handler;
609 cm_id_priv->id.context = context;
610 cm_id_priv->id.remote_cm_qpn = 1;
611 ret = cm_alloc_id(cm_id_priv);
615 spin_lock_init(&cm_id_priv->lock);
616 init_completion(&cm_id_priv->comp);
617 INIT_LIST_HEAD(&cm_id_priv->work_list);
618 atomic_set(&cm_id_priv->work_count, -1);
619 atomic_set(&cm_id_priv->refcount, 1);
620 return &cm_id_priv->id;
624 return ERR_PTR(-ENOMEM);
626 EXPORT_SYMBOL(ib_create_cm_id);
628 static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
630 struct cm_work *work;
632 if (list_empty(&cm_id_priv->work_list))
635 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
636 list_del(&work->list);
640 static void cm_free_work(struct cm_work *work)
642 if (work->mad_recv_wc)
643 ib_free_recv_mad(work->mad_recv_wc);
647 static inline int cm_convert_to_ms(int iba_time)
649 /* approximate conversion to ms from 4.096us x 2^iba_time */
650 return 1 << max(iba_time - 8, 0);
653 static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
657 if (!timewait_info->inserted_remote_id &&
658 !timewait_info->inserted_remote_qp)
661 spin_lock_irqsave(&cm.lock, flags);
662 if (timewait_info->inserted_remote_id) {
663 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
664 timewait_info->inserted_remote_id = 0;
667 if (timewait_info->inserted_remote_qp) {
668 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
669 timewait_info->inserted_remote_qp = 0;
671 spin_unlock_irqrestore(&cm.lock, flags);
674 static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
676 struct cm_timewait_info *timewait_info;
678 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
680 return ERR_PTR(-ENOMEM);
682 timewait_info->work.local_id = local_id;
683 INIT_WORK(&timewait_info->work.work, cm_work_handler,
684 &timewait_info->work);
685 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
686 return timewait_info;
689 static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
694 * The cm_id could be destroyed by the user before we exit timewait.
695 * To protect against this, we search for the cm_id after exiting
696 * timewait before notifying the user that we've exited timewait.
698 cm_id_priv->id.state = IB_CM_TIMEWAIT;
699 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
700 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
701 msecs_to_jiffies(wait_time));
702 cm_id_priv->timewait_info = NULL;
705 static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
707 cm_id_priv->id.state = IB_CM_IDLE;
708 if (cm_id_priv->timewait_info) {
709 cm_cleanup_timewait(cm_id_priv->timewait_info);
710 kfree(cm_id_priv->timewait_info);
711 cm_id_priv->timewait_info = NULL;
715 void ib_destroy_cm_id(struct ib_cm_id *cm_id)
717 struct cm_id_private *cm_id_priv;
718 struct cm_work *work;
721 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
723 spin_lock_irqsave(&cm_id_priv->lock, flags);
724 switch (cm_id->state) {
726 cm_id->state = IB_CM_IDLE;
727 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
728 spin_lock_irqsave(&cm.lock, flags);
729 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
730 spin_unlock_irqrestore(&cm.lock, flags);
732 case IB_CM_SIDR_REQ_SENT:
733 cm_id->state = IB_CM_IDLE;
734 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
735 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
737 case IB_CM_SIDR_REQ_RCVD:
738 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
739 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
742 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
743 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
744 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
745 &cm_id_priv->av.port->cm_dev->ca_guid,
746 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
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);
755 case IB_CM_MRA_REQ_SENT:
757 case IB_CM_MRA_REP_SENT:
758 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
759 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
762 case IB_CM_ESTABLISHED:
763 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
764 ib_send_cm_dreq(cm_id, NULL, 0);
766 case IB_CM_DREQ_SENT:
767 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
768 cm_enter_timewait(cm_id_priv);
769 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
771 case IB_CM_DREQ_RCVD:
772 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
773 ib_send_cm_drep(cm_id, NULL, 0);
776 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
780 cm_free_id(cm_id->local_id);
781 cm_deref_id(cm_id_priv);
782 wait_for_completion(&cm_id_priv->comp);
783 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
785 kfree(cm_id_priv->compare_data);
786 kfree(cm_id_priv->private_data);
789 EXPORT_SYMBOL(ib_destroy_cm_id);
791 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
792 struct ib_cm_compare_data *compare_data)
794 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
798 service_mask = service_mask ? service_mask :
799 __constant_cpu_to_be64(~0ULL);
800 service_id &= service_mask;
801 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
802 (service_id != IB_CM_ASSIGN_SERVICE_ID))
805 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
806 if (cm_id->state != IB_CM_IDLE)
810 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
812 if (!cm_id_priv->compare_data)
814 cm_mask_copy(cm_id_priv->compare_data->data,
815 compare_data->data, compare_data->mask);
816 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
820 cm_id->state = IB_CM_LISTEN;
822 spin_lock_irqsave(&cm.lock, flags);
823 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
824 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
825 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
827 cm_id->service_id = service_id;
828 cm_id->service_mask = service_mask;
830 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
831 spin_unlock_irqrestore(&cm.lock, flags);
833 if (cur_cm_id_priv) {
834 cm_id->state = IB_CM_IDLE;
835 kfree(cm_id_priv->compare_data);
836 cm_id_priv->compare_data = NULL;
841 EXPORT_SYMBOL(ib_cm_listen);
843 static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
844 enum cm_msg_sequence msg_seq)
848 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
849 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
851 return cpu_to_be64(hi_tid | low_tid);
854 static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
855 __be16 attr_id, __be64 tid)
857 hdr->base_version = IB_MGMT_BASE_VERSION;
858 hdr->mgmt_class = IB_MGMT_CLASS_CM;
859 hdr->class_version = IB_CM_CLASS_VERSION;
860 hdr->method = IB_MGMT_METHOD_SEND;
861 hdr->attr_id = attr_id;
865 static void cm_format_req(struct cm_req_msg *req_msg,
866 struct cm_id_private *cm_id_priv,
867 struct ib_cm_req_param *param)
869 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
870 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
872 req_msg->local_comm_id = cm_id_priv->id.local_id;
873 req_msg->service_id = param->service_id;
874 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
875 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
876 cm_req_set_resp_res(req_msg, param->responder_resources);
877 cm_req_set_init_depth(req_msg, param->initiator_depth);
878 cm_req_set_remote_resp_timeout(req_msg,
879 param->remote_cm_response_timeout);
880 cm_req_set_qp_type(req_msg, param->qp_type);
881 cm_req_set_flow_ctrl(req_msg, param->flow_control);
882 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
883 cm_req_set_local_resp_timeout(req_msg,
884 param->local_cm_response_timeout);
885 cm_req_set_retry_count(req_msg, param->retry_count);
886 req_msg->pkey = param->primary_path->pkey;
887 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
888 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
889 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
890 cm_req_set_srq(req_msg, param->srq);
892 req_msg->primary_local_lid = param->primary_path->slid;
893 req_msg->primary_remote_lid = param->primary_path->dlid;
894 req_msg->primary_local_gid = param->primary_path->sgid;
895 req_msg->primary_remote_gid = param->primary_path->dgid;
896 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
897 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
898 req_msg->primary_traffic_class = param->primary_path->traffic_class;
899 req_msg->primary_hop_limit = param->primary_path->hop_limit;
900 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
901 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
902 cm_req_set_primary_local_ack_timeout(req_msg,
903 min(31, param->primary_path->packet_life_time + 1));
905 if (param->alternate_path) {
906 req_msg->alt_local_lid = param->alternate_path->slid;
907 req_msg->alt_remote_lid = param->alternate_path->dlid;
908 req_msg->alt_local_gid = param->alternate_path->sgid;
909 req_msg->alt_remote_gid = param->alternate_path->dgid;
910 cm_req_set_alt_flow_label(req_msg,
911 param->alternate_path->flow_label);
912 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
913 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
914 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
915 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
916 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
917 cm_req_set_alt_local_ack_timeout(req_msg,
918 min(31, param->alternate_path->packet_life_time + 1));
921 if (param->private_data && param->private_data_len)
922 memcpy(req_msg->private_data, param->private_data,
923 param->private_data_len);
926 static int cm_validate_req_param(struct ib_cm_req_param *param)
928 /* peer-to-peer not supported */
929 if (param->peer_to_peer)
932 if (!param->primary_path)
935 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
938 if (param->private_data &&
939 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
942 if (param->alternate_path &&
943 (param->alternate_path->pkey != param->primary_path->pkey ||
944 param->alternate_path->mtu != param->primary_path->mtu))
950 int ib_send_cm_req(struct ib_cm_id *cm_id,
951 struct ib_cm_req_param *param)
953 struct cm_id_private *cm_id_priv;
954 struct cm_req_msg *req_msg;
958 ret = cm_validate_req_param(param);
962 /* Verify that we're not in timewait. */
963 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
964 spin_lock_irqsave(&cm_id_priv->lock, flags);
965 if (cm_id->state != IB_CM_IDLE) {
966 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
970 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
972 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
974 if (IS_ERR(cm_id_priv->timewait_info))
977 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
980 if (param->alternate_path) {
981 ret = cm_init_av_by_path(param->alternate_path,
982 &cm_id_priv->alt_av);
986 cm_id->service_id = param->service_id;
987 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
988 cm_id_priv->timeout_ms = cm_convert_to_ms(
989 param->primary_path->packet_life_time) * 2 +
991 param->remote_cm_response_timeout);
992 cm_id_priv->max_cm_retries = param->max_cm_retries;
993 cm_id_priv->initiator_depth = param->initiator_depth;
994 cm_id_priv->responder_resources = param->responder_resources;
995 cm_id_priv->retry_count = param->retry_count;
996 cm_id_priv->path_mtu = param->primary_path->mtu;
997 cm_id_priv->qp_type = param->qp_type;
999 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1003 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1004 cm_format_req(req_msg, cm_id_priv, param);
1005 cm_id_priv->tid = req_msg->hdr.tid;
1006 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
1007 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1009 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1010 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
1011 cm_id_priv->local_ack_timeout =
1012 cm_req_get_primary_local_ack_timeout(req_msg);
1014 spin_lock_irqsave(&cm_id_priv->lock, flags);
1015 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
1017 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1020 BUG_ON(cm_id->state != IB_CM_IDLE);
1021 cm_id->state = IB_CM_REQ_SENT;
1022 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1025 error2: cm_free_msg(cm_id_priv->msg);
1026 error1: kfree(cm_id_priv->timewait_info);
1029 EXPORT_SYMBOL(ib_send_cm_req);
1031 static int cm_issue_rej(struct cm_port *port,
1032 struct ib_mad_recv_wc *mad_recv_wc,
1033 enum ib_cm_rej_reason reason,
1034 enum cm_msg_response msg_rejected,
1035 void *ari, u8 ari_length)
1037 struct ib_mad_send_buf *msg = NULL;
1038 struct cm_rej_msg *rej_msg, *rcv_msg;
1041 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1045 /* We just need common CM header information. Cast to any message. */
1046 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1047 rej_msg = (struct cm_rej_msg *) msg->mad;
1049 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1050 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1051 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1052 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
1053 rej_msg->reason = cpu_to_be16(reason);
1055 if (ari && ari_length) {
1056 cm_rej_set_reject_info_len(rej_msg, ari_length);
1057 memcpy(rej_msg->ari, ari, ari_length);
1060 ret = ib_post_send_mad(msg, NULL);
1067 static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1068 __be32 local_qpn, __be32 remote_qpn)
1070 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1071 ((local_ca_guid == remote_ca_guid) &&
1072 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1075 static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
1076 struct ib_sa_path_rec *primary_path,
1077 struct ib_sa_path_rec *alt_path)
1079 memset(primary_path, 0, sizeof *primary_path);
1080 primary_path->dgid = req_msg->primary_local_gid;
1081 primary_path->sgid = req_msg->primary_remote_gid;
1082 primary_path->dlid = req_msg->primary_local_lid;
1083 primary_path->slid = req_msg->primary_remote_lid;
1084 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1085 primary_path->hop_limit = req_msg->primary_hop_limit;
1086 primary_path->traffic_class = req_msg->primary_traffic_class;
1087 primary_path->reversible = 1;
1088 primary_path->pkey = req_msg->pkey;
1089 primary_path->sl = cm_req_get_primary_sl(req_msg);
1090 primary_path->mtu_selector = IB_SA_EQ;
1091 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1092 primary_path->rate_selector = IB_SA_EQ;
1093 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1094 primary_path->packet_life_time_selector = IB_SA_EQ;
1095 primary_path->packet_life_time =
1096 cm_req_get_primary_local_ack_timeout(req_msg);
1097 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1099 if (req_msg->alt_local_lid) {
1100 memset(alt_path, 0, sizeof *alt_path);
1101 alt_path->dgid = req_msg->alt_local_gid;
1102 alt_path->sgid = req_msg->alt_remote_gid;
1103 alt_path->dlid = req_msg->alt_local_lid;
1104 alt_path->slid = req_msg->alt_remote_lid;
1105 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1106 alt_path->hop_limit = req_msg->alt_hop_limit;
1107 alt_path->traffic_class = req_msg->alt_traffic_class;
1108 alt_path->reversible = 1;
1109 alt_path->pkey = req_msg->pkey;
1110 alt_path->sl = cm_req_get_alt_sl(req_msg);
1111 alt_path->mtu_selector = IB_SA_EQ;
1112 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1113 alt_path->rate_selector = IB_SA_EQ;
1114 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1115 alt_path->packet_life_time_selector = IB_SA_EQ;
1116 alt_path->packet_life_time =
1117 cm_req_get_alt_local_ack_timeout(req_msg);
1118 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1122 static void cm_format_req_event(struct cm_work *work,
1123 struct cm_id_private *cm_id_priv,
1124 struct ib_cm_id *listen_id)
1126 struct cm_req_msg *req_msg;
1127 struct ib_cm_req_event_param *param;
1129 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1130 param = &work->cm_event.param.req_rcvd;
1131 param->listen_id = listen_id;
1132 param->port = cm_id_priv->av.port->port_num;
1133 param->primary_path = &work->path[0];
1134 if (req_msg->alt_local_lid)
1135 param->alternate_path = &work->path[1];
1137 param->alternate_path = NULL;
1138 param->remote_ca_guid = req_msg->local_ca_guid;
1139 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1140 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1141 param->qp_type = cm_req_get_qp_type(req_msg);
1142 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1143 param->responder_resources = cm_req_get_init_depth(req_msg);
1144 param->initiator_depth = cm_req_get_resp_res(req_msg);
1145 param->local_cm_response_timeout =
1146 cm_req_get_remote_resp_timeout(req_msg);
1147 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1148 param->remote_cm_response_timeout =
1149 cm_req_get_local_resp_timeout(req_msg);
1150 param->retry_count = cm_req_get_retry_count(req_msg);
1151 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1152 param->srq = cm_req_get_srq(req_msg);
1153 work->cm_event.private_data = &req_msg->private_data;
1156 static void cm_process_work(struct cm_id_private *cm_id_priv,
1157 struct cm_work *work)
1159 unsigned long flags;
1162 /* We will typically only have the current event to report. */
1163 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1166 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1167 spin_lock_irqsave(&cm_id_priv->lock, flags);
1168 work = cm_dequeue_work(cm_id_priv);
1169 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1171 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1175 cm_deref_id(cm_id_priv);
1177 ib_destroy_cm_id(&cm_id_priv->id);
1180 static void cm_format_mra(struct cm_mra_msg *mra_msg,
1181 struct cm_id_private *cm_id_priv,
1182 enum cm_msg_response msg_mraed, u8 service_timeout,
1183 const void *private_data, u8 private_data_len)
1185 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1186 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1187 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1188 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1189 cm_mra_set_service_timeout(mra_msg, service_timeout);
1191 if (private_data && private_data_len)
1192 memcpy(mra_msg->private_data, private_data, private_data_len);
1195 static void cm_format_rej(struct cm_rej_msg *rej_msg,
1196 struct cm_id_private *cm_id_priv,
1197 enum ib_cm_rej_reason reason,
1200 const void *private_data,
1201 u8 private_data_len)
1203 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1204 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1206 switch(cm_id_priv->id.state) {
1207 case IB_CM_REQ_RCVD:
1208 rej_msg->local_comm_id = 0;
1209 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1211 case IB_CM_MRA_REQ_SENT:
1212 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1213 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1215 case IB_CM_REP_RCVD:
1216 case IB_CM_MRA_REP_SENT:
1217 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1218 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1221 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1222 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1226 rej_msg->reason = cpu_to_be16(reason);
1227 if (ari && ari_length) {
1228 cm_rej_set_reject_info_len(rej_msg, ari_length);
1229 memcpy(rej_msg->ari, ari, ari_length);
1232 if (private_data && private_data_len)
1233 memcpy(rej_msg->private_data, private_data, private_data_len);
1236 static void cm_dup_req_handler(struct cm_work *work,
1237 struct cm_id_private *cm_id_priv)
1239 struct ib_mad_send_buf *msg = NULL;
1240 unsigned long flags;
1243 /* Quick state check to discard duplicate REQs. */
1244 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1247 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1251 spin_lock_irqsave(&cm_id_priv->lock, flags);
1252 switch (cm_id_priv->id.state) {
1253 case IB_CM_MRA_REQ_SENT:
1254 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1255 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1256 cm_id_priv->private_data,
1257 cm_id_priv->private_data_len);
1259 case IB_CM_TIMEWAIT:
1260 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1261 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1266 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1268 ret = ib_post_send_mad(msg, NULL);
1273 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1274 free: cm_free_msg(msg);
1277 static struct cm_id_private * cm_match_req(struct cm_work *work,
1278 struct cm_id_private *cm_id_priv)
1280 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1281 struct cm_timewait_info *timewait_info;
1282 struct cm_req_msg *req_msg;
1283 unsigned long flags;
1285 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1287 /* Check for duplicate REQ and stale connections. */
1288 spin_lock_irqsave(&cm.lock, flags);
1289 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1291 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1293 if (timewait_info) {
1294 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1295 timewait_info->work.remote_id);
1296 spin_unlock_irqrestore(&cm.lock, flags);
1297 if (cur_cm_id_priv) {
1298 cm_dup_req_handler(work, cur_cm_id_priv);
1299 cm_deref_id(cur_cm_id_priv);
1301 cm_issue_rej(work->port, work->mad_recv_wc,
1302 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1307 /* Find matching listen request. */
1308 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
1309 req_msg->service_id,
1310 req_msg->private_data);
1311 if (!listen_cm_id_priv) {
1312 spin_unlock_irqrestore(&cm.lock, flags);
1313 cm_issue_rej(work->port, work->mad_recv_wc,
1314 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1318 atomic_inc(&listen_cm_id_priv->refcount);
1319 atomic_inc(&cm_id_priv->refcount);
1320 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1321 atomic_inc(&cm_id_priv->work_count);
1322 spin_unlock_irqrestore(&cm.lock, flags);
1323 return listen_cm_id_priv;
1325 error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1329 static int cm_req_handler(struct cm_work *work)
1331 struct ib_cm_id *cm_id;
1332 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1333 struct cm_req_msg *req_msg;
1336 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1338 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
1340 return PTR_ERR(cm_id);
1342 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1343 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1344 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
1346 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1348 if (IS_ERR(cm_id_priv->timewait_info)) {
1349 ret = PTR_ERR(cm_id_priv->timewait_info);
1352 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1353 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1354 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1356 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1357 if (!listen_cm_id_priv) {
1362 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1363 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1364 cm_id_priv->id.service_id = req_msg->service_id;
1365 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
1367 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1368 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1371 if (req_msg->alt_local_lid) {
1372 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1376 cm_id_priv->tid = req_msg->hdr.tid;
1377 cm_id_priv->timeout_ms = cm_convert_to_ms(
1378 cm_req_get_local_resp_timeout(req_msg));
1379 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1380 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1381 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1382 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1383 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1384 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1385 cm_id_priv->local_ack_timeout =
1386 cm_req_get_primary_local_ack_timeout(req_msg);
1387 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1388 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1389 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
1391 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1392 cm_process_work(cm_id_priv, work);
1393 cm_deref_id(listen_cm_id_priv);
1396 error3: atomic_dec(&cm_id_priv->refcount);
1397 cm_deref_id(listen_cm_id_priv);
1398 cm_cleanup_timewait(cm_id_priv->timewait_info);
1399 error2: kfree(cm_id_priv->timewait_info);
1400 cm_id_priv->timewait_info = NULL;
1401 error1: ib_destroy_cm_id(&cm_id_priv->id);
1405 static void cm_format_rep(struct cm_rep_msg *rep_msg,
1406 struct cm_id_private *cm_id_priv,
1407 struct ib_cm_rep_param *param)
1409 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1410 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1411 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1412 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1413 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1414 rep_msg->resp_resources = param->responder_resources;
1415 rep_msg->initiator_depth = param->initiator_depth;
1416 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1417 cm_rep_set_failover(rep_msg, param->failover_accepted);
1418 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1419 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1420 cm_rep_set_srq(rep_msg, param->srq);
1421 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1423 if (param->private_data && param->private_data_len)
1424 memcpy(rep_msg->private_data, param->private_data,
1425 param->private_data_len);
1428 int ib_send_cm_rep(struct ib_cm_id *cm_id,
1429 struct ib_cm_rep_param *param)
1431 struct cm_id_private *cm_id_priv;
1432 struct ib_mad_send_buf *msg;
1433 struct cm_rep_msg *rep_msg;
1434 unsigned long flags;
1437 if (param->private_data &&
1438 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1441 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1442 spin_lock_irqsave(&cm_id_priv->lock, flags);
1443 if (cm_id->state != IB_CM_REQ_RCVD &&
1444 cm_id->state != IB_CM_MRA_REQ_SENT) {
1449 ret = cm_alloc_msg(cm_id_priv, &msg);
1453 rep_msg = (struct cm_rep_msg *) msg->mad;
1454 cm_format_rep(rep_msg, cm_id_priv, param);
1455 msg->timeout_ms = cm_id_priv->timeout_ms;
1456 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1458 ret = ib_post_send_mad(msg, NULL);
1460 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1465 cm_id->state = IB_CM_REP_SENT;
1466 cm_id_priv->msg = msg;
1467 cm_id_priv->initiator_depth = param->initiator_depth;
1468 cm_id_priv->responder_resources = param->responder_resources;
1469 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1470 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1472 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1475 EXPORT_SYMBOL(ib_send_cm_rep);
1477 static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1478 struct cm_id_private *cm_id_priv,
1479 const void *private_data,
1480 u8 private_data_len)
1482 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1483 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1484 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1486 if (private_data && private_data_len)
1487 memcpy(rtu_msg->private_data, private_data, private_data_len);
1490 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1491 const void *private_data,
1492 u8 private_data_len)
1494 struct cm_id_private *cm_id_priv;
1495 struct ib_mad_send_buf *msg;
1496 unsigned long flags;
1500 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1503 data = cm_copy_private_data(private_data, private_data_len);
1505 return PTR_ERR(data);
1507 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1508 spin_lock_irqsave(&cm_id_priv->lock, flags);
1509 if (cm_id->state != IB_CM_REP_RCVD &&
1510 cm_id->state != IB_CM_MRA_REP_SENT) {
1515 ret = cm_alloc_msg(cm_id_priv, &msg);
1519 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1520 private_data, private_data_len);
1522 ret = ib_post_send_mad(msg, NULL);
1524 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1530 cm_id->state = IB_CM_ESTABLISHED;
1531 cm_set_private_data(cm_id_priv, data, private_data_len);
1532 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1535 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1539 EXPORT_SYMBOL(ib_send_cm_rtu);
1541 static void cm_format_rep_event(struct cm_work *work)
1543 struct cm_rep_msg *rep_msg;
1544 struct ib_cm_rep_event_param *param;
1546 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1547 param = &work->cm_event.param.rep_rcvd;
1548 param->remote_ca_guid = rep_msg->local_ca_guid;
1549 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1550 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1551 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1552 param->responder_resources = rep_msg->initiator_depth;
1553 param->initiator_depth = rep_msg->resp_resources;
1554 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1555 param->failover_accepted = cm_rep_get_failover(rep_msg);
1556 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1557 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1558 param->srq = cm_rep_get_srq(rep_msg);
1559 work->cm_event.private_data = &rep_msg->private_data;
1562 static void cm_dup_rep_handler(struct cm_work *work)
1564 struct cm_id_private *cm_id_priv;
1565 struct cm_rep_msg *rep_msg;
1566 struct ib_mad_send_buf *msg = NULL;
1567 unsigned long flags;
1570 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1571 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1572 rep_msg->local_comm_id);
1576 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1580 spin_lock_irqsave(&cm_id_priv->lock, flags);
1581 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1582 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1583 cm_id_priv->private_data,
1584 cm_id_priv->private_data_len);
1585 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1586 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1587 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1588 cm_id_priv->private_data,
1589 cm_id_priv->private_data_len);
1592 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1594 ret = ib_post_send_mad(msg, NULL);
1599 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1600 free: cm_free_msg(msg);
1601 deref: cm_deref_id(cm_id_priv);
1604 static int cm_rep_handler(struct cm_work *work)
1606 struct cm_id_private *cm_id_priv;
1607 struct cm_rep_msg *rep_msg;
1608 unsigned long flags;
1611 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1612 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1614 cm_dup_rep_handler(work);
1618 cm_format_rep_event(work);
1620 spin_lock_irqsave(&cm_id_priv->lock, flags);
1621 switch (cm_id_priv->id.state) {
1622 case IB_CM_REQ_SENT:
1623 case IB_CM_MRA_REQ_RCVD:
1626 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1631 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1632 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1633 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1635 spin_lock(&cm.lock);
1636 /* Check for duplicate REP. */
1637 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
1638 spin_unlock(&cm.lock);
1639 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1643 /* Check for a stale connection. */
1644 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
1645 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1646 &cm.remote_id_table);
1647 cm_id_priv->timewait_info->inserted_remote_id = 0;
1648 spin_unlock(&cm.lock);
1649 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1650 cm_issue_rej(work->port, work->mad_recv_wc,
1651 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1656 spin_unlock(&cm.lock);
1658 cm_id_priv->id.state = IB_CM_REP_RCVD;
1659 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1660 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1661 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1662 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1663 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1664 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1666 /* todo: handle peer_to_peer */
1668 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1669 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1671 list_add_tail(&work->list, &cm_id_priv->work_list);
1672 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1675 cm_process_work(cm_id_priv, work);
1677 cm_deref_id(cm_id_priv);
1681 cm_deref_id(cm_id_priv);
1685 static int cm_establish_handler(struct cm_work *work)
1687 struct cm_id_private *cm_id_priv;
1688 unsigned long flags;
1691 /* See comment in ib_cm_establish about lookup. */
1692 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1696 spin_lock_irqsave(&cm_id_priv->lock, flags);
1697 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1698 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1702 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1703 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1705 list_add_tail(&work->list, &cm_id_priv->work_list);
1706 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1709 cm_process_work(cm_id_priv, work);
1711 cm_deref_id(cm_id_priv);
1714 cm_deref_id(cm_id_priv);
1718 static int cm_rtu_handler(struct cm_work *work)
1720 struct cm_id_private *cm_id_priv;
1721 struct cm_rtu_msg *rtu_msg;
1722 unsigned long flags;
1725 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1726 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1727 rtu_msg->local_comm_id);
1731 work->cm_event.private_data = &rtu_msg->private_data;
1733 spin_lock_irqsave(&cm_id_priv->lock, flags);
1734 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1735 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1736 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1739 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1741 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1742 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1744 list_add_tail(&work->list, &cm_id_priv->work_list);
1745 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1748 cm_process_work(cm_id_priv, work);
1750 cm_deref_id(cm_id_priv);
1753 cm_deref_id(cm_id_priv);
1757 static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1758 struct cm_id_private *cm_id_priv,
1759 const void *private_data,
1760 u8 private_data_len)
1762 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1763 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1764 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1765 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1766 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1768 if (private_data && private_data_len)
1769 memcpy(dreq_msg->private_data, private_data, private_data_len);
1772 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1773 const void *private_data,
1774 u8 private_data_len)
1776 struct cm_id_private *cm_id_priv;
1777 struct ib_mad_send_buf *msg;
1778 unsigned long flags;
1781 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1784 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1785 spin_lock_irqsave(&cm_id_priv->lock, flags);
1786 if (cm_id->state != IB_CM_ESTABLISHED) {
1791 ret = cm_alloc_msg(cm_id_priv, &msg);
1793 cm_enter_timewait(cm_id_priv);
1797 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1798 private_data, private_data_len);
1799 msg->timeout_ms = cm_id_priv->timeout_ms;
1800 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1802 ret = ib_post_send_mad(msg, NULL);
1804 cm_enter_timewait(cm_id_priv);
1805 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1810 cm_id->state = IB_CM_DREQ_SENT;
1811 cm_id_priv->msg = msg;
1812 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1815 EXPORT_SYMBOL(ib_send_cm_dreq);
1817 static void cm_format_drep(struct cm_drep_msg *drep_msg,
1818 struct cm_id_private *cm_id_priv,
1819 const void *private_data,
1820 u8 private_data_len)
1822 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1823 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1824 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1826 if (private_data && private_data_len)
1827 memcpy(drep_msg->private_data, private_data, private_data_len);
1830 int ib_send_cm_drep(struct ib_cm_id *cm_id,
1831 const void *private_data,
1832 u8 private_data_len)
1834 struct cm_id_private *cm_id_priv;
1835 struct ib_mad_send_buf *msg;
1836 unsigned long flags;
1840 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1843 data = cm_copy_private_data(private_data, private_data_len);
1845 return PTR_ERR(data);
1847 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1848 spin_lock_irqsave(&cm_id_priv->lock, flags);
1849 if (cm_id->state != IB_CM_DREQ_RCVD) {
1850 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1855 cm_set_private_data(cm_id_priv, data, private_data_len);
1856 cm_enter_timewait(cm_id_priv);
1858 ret = cm_alloc_msg(cm_id_priv, &msg);
1862 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1863 private_data, private_data_len);
1865 ret = ib_post_send_mad(msg, NULL);
1867 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1872 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1875 EXPORT_SYMBOL(ib_send_cm_drep);
1877 static int cm_dreq_handler(struct cm_work *work)
1879 struct cm_id_private *cm_id_priv;
1880 struct cm_dreq_msg *dreq_msg;
1881 struct ib_mad_send_buf *msg = NULL;
1882 unsigned long flags;
1885 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1886 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1887 dreq_msg->local_comm_id);
1891 work->cm_event.private_data = &dreq_msg->private_data;
1893 spin_lock_irqsave(&cm_id_priv->lock, flags);
1894 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1897 switch (cm_id_priv->id.state) {
1898 case IB_CM_REP_SENT:
1899 case IB_CM_DREQ_SENT:
1900 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1902 case IB_CM_ESTABLISHED:
1903 case IB_CM_MRA_REP_RCVD:
1905 case IB_CM_TIMEWAIT:
1906 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1909 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1910 cm_id_priv->private_data,
1911 cm_id_priv->private_data_len);
1912 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1914 if (ib_post_send_mad(msg, NULL))
1920 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1921 cm_id_priv->tid = dreq_msg->hdr.tid;
1922 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1924 list_add_tail(&work->list, &cm_id_priv->work_list);
1925 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1928 cm_process_work(cm_id_priv, work);
1930 cm_deref_id(cm_id_priv);
1933 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1934 deref: cm_deref_id(cm_id_priv);
1938 static int cm_drep_handler(struct cm_work *work)
1940 struct cm_id_private *cm_id_priv;
1941 struct cm_drep_msg *drep_msg;
1942 unsigned long flags;
1945 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
1946 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
1947 drep_msg->local_comm_id);
1951 work->cm_event.private_data = &drep_msg->private_data;
1953 spin_lock_irqsave(&cm_id_priv->lock, flags);
1954 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
1955 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
1956 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1959 cm_enter_timewait(cm_id_priv);
1961 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1962 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1964 list_add_tail(&work->list, &cm_id_priv->work_list);
1965 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1968 cm_process_work(cm_id_priv, work);
1970 cm_deref_id(cm_id_priv);
1973 cm_deref_id(cm_id_priv);
1977 int ib_send_cm_rej(struct ib_cm_id *cm_id,
1978 enum ib_cm_rej_reason reason,
1981 const void *private_data,
1982 u8 private_data_len)
1984 struct cm_id_private *cm_id_priv;
1985 struct ib_mad_send_buf *msg;
1986 unsigned long flags;
1989 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
1990 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
1993 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1995 spin_lock_irqsave(&cm_id_priv->lock, flags);
1996 switch (cm_id->state) {
1997 case IB_CM_REQ_SENT:
1998 case IB_CM_MRA_REQ_RCVD:
1999 case IB_CM_REQ_RCVD:
2000 case IB_CM_MRA_REQ_SENT:
2001 case IB_CM_REP_RCVD:
2002 case IB_CM_MRA_REP_SENT:
2003 ret = cm_alloc_msg(cm_id_priv, &msg);
2005 cm_format_rej((struct cm_rej_msg *) msg->mad,
2006 cm_id_priv, reason, ari, ari_length,
2007 private_data, private_data_len);
2009 cm_reset_to_idle(cm_id_priv);
2011 case IB_CM_REP_SENT:
2012 case IB_CM_MRA_REP_RCVD:
2013 ret = cm_alloc_msg(cm_id_priv, &msg);
2015 cm_format_rej((struct cm_rej_msg *) msg->mad,
2016 cm_id_priv, reason, ari, ari_length,
2017 private_data, private_data_len);
2019 cm_enter_timewait(cm_id_priv);
2029 ret = ib_post_send_mad(msg, NULL);
2033 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2036 EXPORT_SYMBOL(ib_send_cm_rej);
2038 static void cm_format_rej_event(struct cm_work *work)
2040 struct cm_rej_msg *rej_msg;
2041 struct ib_cm_rej_event_param *param;
2043 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2044 param = &work->cm_event.param.rej_rcvd;
2045 param->ari = rej_msg->ari;
2046 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
2047 param->reason = __be16_to_cpu(rej_msg->reason);
2048 work->cm_event.private_data = &rej_msg->private_data;
2051 static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2053 struct cm_timewait_info *timewait_info;
2054 struct cm_id_private *cm_id_priv;
2055 unsigned long flags;
2058 remote_id = rej_msg->local_comm_id;
2060 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
2061 spin_lock_irqsave(&cm.lock, flags);
2062 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
2064 if (!timewait_info) {
2065 spin_unlock_irqrestore(&cm.lock, flags);
2068 cm_id_priv = idr_find(&cm.local_id_table,
2069 (__force int) timewait_info->work.local_id);
2071 if (cm_id_priv->id.remote_id == remote_id)
2072 atomic_inc(&cm_id_priv->refcount);
2076 spin_unlock_irqrestore(&cm.lock, flags);
2077 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2078 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2080 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2085 static int cm_rej_handler(struct cm_work *work)
2087 struct cm_id_private *cm_id_priv;
2088 struct cm_rej_msg *rej_msg;
2089 unsigned long flags;
2092 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2093 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2097 cm_format_rej_event(work);
2099 spin_lock_irqsave(&cm_id_priv->lock, flags);
2100 switch (cm_id_priv->id.state) {
2101 case IB_CM_REQ_SENT:
2102 case IB_CM_MRA_REQ_RCVD:
2103 case IB_CM_REP_SENT:
2104 case IB_CM_MRA_REP_RCVD:
2105 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2107 case IB_CM_REQ_RCVD:
2108 case IB_CM_MRA_REQ_SENT:
2109 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
2110 cm_enter_timewait(cm_id_priv);
2112 cm_reset_to_idle(cm_id_priv);
2114 case IB_CM_DREQ_SENT:
2115 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2117 case IB_CM_REP_RCVD:
2118 case IB_CM_MRA_REP_SENT:
2119 case IB_CM_ESTABLISHED:
2120 cm_enter_timewait(cm_id_priv);
2123 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2128 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2130 list_add_tail(&work->list, &cm_id_priv->work_list);
2131 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2134 cm_process_work(cm_id_priv, work);
2136 cm_deref_id(cm_id_priv);
2139 cm_deref_id(cm_id_priv);
2143 int ib_send_cm_mra(struct ib_cm_id *cm_id,
2145 const void *private_data,
2146 u8 private_data_len)
2148 struct cm_id_private *cm_id_priv;
2149 struct ib_mad_send_buf *msg;
2151 unsigned long flags;
2154 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2157 data = cm_copy_private_data(private_data, private_data_len);
2159 return PTR_ERR(data);
2161 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2163 spin_lock_irqsave(&cm_id_priv->lock, flags);
2164 switch(cm_id_priv->id.state) {
2165 case IB_CM_REQ_RCVD:
2166 ret = cm_alloc_msg(cm_id_priv, &msg);
2170 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2171 CM_MSG_RESPONSE_REQ, service_timeout,
2172 private_data, private_data_len);
2173 ret = ib_post_send_mad(msg, NULL);
2176 cm_id->state = IB_CM_MRA_REQ_SENT;
2178 case IB_CM_REP_RCVD:
2179 ret = cm_alloc_msg(cm_id_priv, &msg);
2183 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2184 CM_MSG_RESPONSE_REP, service_timeout,
2185 private_data, private_data_len);
2186 ret = ib_post_send_mad(msg, NULL);
2189 cm_id->state = IB_CM_MRA_REP_SENT;
2191 case IB_CM_ESTABLISHED:
2192 ret = cm_alloc_msg(cm_id_priv, &msg);
2196 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2197 CM_MSG_RESPONSE_OTHER, service_timeout,
2198 private_data, private_data_len);
2199 ret = ib_post_send_mad(msg, NULL);
2202 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2208 cm_id_priv->service_timeout = service_timeout;
2209 cm_set_private_data(cm_id_priv, data, private_data_len);
2210 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2213 error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2217 error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2222 EXPORT_SYMBOL(ib_send_cm_mra);
2224 static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2226 switch (cm_mra_get_msg_mraed(mra_msg)) {
2227 case CM_MSG_RESPONSE_REQ:
2228 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2229 case CM_MSG_RESPONSE_REP:
2230 case CM_MSG_RESPONSE_OTHER:
2231 return cm_acquire_id(mra_msg->remote_comm_id,
2232 mra_msg->local_comm_id);
2238 static int cm_mra_handler(struct cm_work *work)
2240 struct cm_id_private *cm_id_priv;
2241 struct cm_mra_msg *mra_msg;
2242 unsigned long flags;
2245 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2246 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2250 work->cm_event.private_data = &mra_msg->private_data;
2251 work->cm_event.param.mra_rcvd.service_timeout =
2252 cm_mra_get_service_timeout(mra_msg);
2253 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2254 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2256 spin_lock_irqsave(&cm_id_priv->lock, flags);
2257 switch (cm_id_priv->id.state) {
2258 case IB_CM_REQ_SENT:
2259 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2260 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2261 cm_id_priv->msg, timeout))
2263 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2265 case IB_CM_REP_SENT:
2266 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
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_REP_RCVD;
2272 case IB_CM_ESTABLISHED:
2273 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2274 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2275 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2276 cm_id_priv->msg, timeout))
2278 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2284 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2285 cm_id_priv->id.state;
2286 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2288 list_add_tail(&work->list, &cm_id_priv->work_list);
2289 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2292 cm_process_work(cm_id_priv, work);
2294 cm_deref_id(cm_id_priv);
2297 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2298 cm_deref_id(cm_id_priv);
2302 static void cm_format_lap(struct cm_lap_msg *lap_msg,
2303 struct cm_id_private *cm_id_priv,
2304 struct ib_sa_path_rec *alternate_path,
2305 const void *private_data,
2306 u8 private_data_len)
2308 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2309 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2310 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2311 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2312 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2313 /* todo: need remote CM response timeout */
2314 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2315 lap_msg->alt_local_lid = alternate_path->slid;
2316 lap_msg->alt_remote_lid = alternate_path->dlid;
2317 lap_msg->alt_local_gid = alternate_path->sgid;
2318 lap_msg->alt_remote_gid = alternate_path->dgid;
2319 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2320 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2321 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2322 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2323 cm_lap_set_sl(lap_msg, alternate_path->sl);
2324 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2325 cm_lap_set_local_ack_timeout(lap_msg,
2326 min(31, alternate_path->packet_life_time + 1));
2328 if (private_data && private_data_len)
2329 memcpy(lap_msg->private_data, private_data, private_data_len);
2332 int ib_send_cm_lap(struct ib_cm_id *cm_id,
2333 struct ib_sa_path_rec *alternate_path,
2334 const void *private_data,
2335 u8 private_data_len)
2337 struct cm_id_private *cm_id_priv;
2338 struct ib_mad_send_buf *msg;
2339 unsigned long flags;
2342 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2345 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2346 spin_lock_irqsave(&cm_id_priv->lock, flags);
2347 if (cm_id->state != IB_CM_ESTABLISHED ||
2348 cm_id->lap_state != IB_CM_LAP_IDLE) {
2353 ret = cm_alloc_msg(cm_id_priv, &msg);
2357 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2358 alternate_path, private_data, private_data_len);
2359 msg->timeout_ms = cm_id_priv->timeout_ms;
2360 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2362 ret = ib_post_send_mad(msg, NULL);
2364 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2369 cm_id->lap_state = IB_CM_LAP_SENT;
2370 cm_id_priv->msg = msg;
2372 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2375 EXPORT_SYMBOL(ib_send_cm_lap);
2377 static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2378 struct cm_lap_msg *lap_msg)
2380 memset(path, 0, sizeof *path);
2381 path->dgid = lap_msg->alt_local_gid;
2382 path->sgid = lap_msg->alt_remote_gid;
2383 path->dlid = lap_msg->alt_local_lid;
2384 path->slid = lap_msg->alt_remote_lid;
2385 path->flow_label = cm_lap_get_flow_label(lap_msg);
2386 path->hop_limit = lap_msg->alt_hop_limit;
2387 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2388 path->reversible = 1;
2389 /* pkey is same as in REQ */
2390 path->sl = cm_lap_get_sl(lap_msg);
2391 path->mtu_selector = IB_SA_EQ;
2392 /* mtu is same as in REQ */
2393 path->rate_selector = IB_SA_EQ;
2394 path->rate = cm_lap_get_packet_rate(lap_msg);
2395 path->packet_life_time_selector = IB_SA_EQ;
2396 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2397 path->packet_life_time -= (path->packet_life_time > 0);
2400 static int cm_lap_handler(struct cm_work *work)
2402 struct cm_id_private *cm_id_priv;
2403 struct cm_lap_msg *lap_msg;
2404 struct ib_cm_lap_event_param *param;
2405 struct ib_mad_send_buf *msg = NULL;
2406 unsigned long flags;
2409 /* todo: verify LAP request and send reject APR if invalid. */
2410 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2411 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2412 lap_msg->local_comm_id);
2416 param = &work->cm_event.param.lap_rcvd;
2417 param->alternate_path = &work->path[0];
2418 cm_format_path_from_lap(param->alternate_path, lap_msg);
2419 work->cm_event.private_data = &lap_msg->private_data;
2421 spin_lock_irqsave(&cm_id_priv->lock, flags);
2422 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2425 switch (cm_id_priv->id.lap_state) {
2426 case IB_CM_LAP_IDLE:
2428 case IB_CM_MRA_LAP_SENT:
2429 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2432 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2433 CM_MSG_RESPONSE_OTHER,
2434 cm_id_priv->service_timeout,
2435 cm_id_priv->private_data,
2436 cm_id_priv->private_data_len);
2437 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2439 if (ib_post_send_mad(msg, NULL))
2446 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2447 cm_id_priv->tid = lap_msg->hdr.tid;
2448 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2450 list_add_tail(&work->list, &cm_id_priv->work_list);
2451 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2454 cm_process_work(cm_id_priv, work);
2456 cm_deref_id(cm_id_priv);
2459 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2460 deref: cm_deref_id(cm_id_priv);
2464 static void cm_format_apr(struct cm_apr_msg *apr_msg,
2465 struct cm_id_private *cm_id_priv,
2466 enum ib_cm_apr_status status,
2469 const void *private_data,
2470 u8 private_data_len)
2472 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2473 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2474 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2475 apr_msg->ap_status = (u8) status;
2477 if (info && info_length) {
2478 apr_msg->info_length = info_length;
2479 memcpy(apr_msg->info, info, info_length);
2482 if (private_data && private_data_len)
2483 memcpy(apr_msg->private_data, private_data, private_data_len);
2486 int ib_send_cm_apr(struct ib_cm_id *cm_id,
2487 enum ib_cm_apr_status status,
2490 const void *private_data,
2491 u8 private_data_len)
2493 struct cm_id_private *cm_id_priv;
2494 struct ib_mad_send_buf *msg;
2495 unsigned long flags;
2498 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2499 (info && info_length > IB_CM_APR_INFO_LENGTH))
2502 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2503 spin_lock_irqsave(&cm_id_priv->lock, flags);
2504 if (cm_id->state != IB_CM_ESTABLISHED ||
2505 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2506 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2511 ret = cm_alloc_msg(cm_id_priv, &msg);
2515 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2516 info, info_length, private_data, private_data_len);
2517 ret = ib_post_send_mad(msg, NULL);
2519 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2524 cm_id->lap_state = IB_CM_LAP_IDLE;
2525 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2528 EXPORT_SYMBOL(ib_send_cm_apr);
2530 static int cm_apr_handler(struct cm_work *work)
2532 struct cm_id_private *cm_id_priv;
2533 struct cm_apr_msg *apr_msg;
2534 unsigned long flags;
2537 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2538 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2539 apr_msg->local_comm_id);
2541 return -EINVAL; /* Unmatched reply. */
2543 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2544 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2545 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2546 work->cm_event.private_data = &apr_msg->private_data;
2548 spin_lock_irqsave(&cm_id_priv->lock, flags);
2549 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2550 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2551 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2552 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2555 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
2556 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2557 cm_id_priv->msg = NULL;
2559 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2561 list_add_tail(&work->list, &cm_id_priv->work_list);
2562 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2565 cm_process_work(cm_id_priv, work);
2567 cm_deref_id(cm_id_priv);
2570 cm_deref_id(cm_id_priv);
2574 static int cm_timewait_handler(struct cm_work *work)
2576 struct cm_timewait_info *timewait_info;
2577 struct cm_id_private *cm_id_priv;
2578 unsigned long flags;
2581 timewait_info = (struct cm_timewait_info *)work;
2582 cm_cleanup_timewait(timewait_info);
2584 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2585 timewait_info->work.remote_id);
2589 spin_lock_irqsave(&cm_id_priv->lock, flags);
2590 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2591 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2592 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2595 cm_id_priv->id.state = IB_CM_IDLE;
2596 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2598 list_add_tail(&work->list, &cm_id_priv->work_list);
2599 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2602 cm_process_work(cm_id_priv, work);
2604 cm_deref_id(cm_id_priv);
2607 cm_deref_id(cm_id_priv);
2611 static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2612 struct cm_id_private *cm_id_priv,
2613 struct ib_cm_sidr_req_param *param)
2615 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2616 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2617 sidr_req_msg->request_id = cm_id_priv->id.local_id;
2618 sidr_req_msg->pkey = cpu_to_be16(param->pkey);
2619 sidr_req_msg->service_id = param->service_id;
2621 if (param->private_data && param->private_data_len)
2622 memcpy(sidr_req_msg->private_data, param->private_data,
2623 param->private_data_len);
2626 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2627 struct ib_cm_sidr_req_param *param)
2629 struct cm_id_private *cm_id_priv;
2630 struct ib_mad_send_buf *msg;
2631 unsigned long flags;
2634 if (!param->path || (param->private_data &&
2635 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2638 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2639 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2643 cm_id->service_id = param->service_id;
2644 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
2645 cm_id_priv->timeout_ms = param->timeout_ms;
2646 cm_id_priv->max_cm_retries = param->max_cm_retries;
2647 ret = cm_alloc_msg(cm_id_priv, &msg);
2651 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2653 msg->timeout_ms = cm_id_priv->timeout_ms;
2654 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2656 spin_lock_irqsave(&cm_id_priv->lock, flags);
2657 if (cm_id->state == IB_CM_IDLE)
2658 ret = ib_post_send_mad(msg, NULL);
2663 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2667 cm_id->state = IB_CM_SIDR_REQ_SENT;
2668 cm_id_priv->msg = msg;
2669 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2673 EXPORT_SYMBOL(ib_send_cm_sidr_req);
2675 static void cm_format_sidr_req_event(struct cm_work *work,
2676 struct ib_cm_id *listen_id)
2678 struct cm_sidr_req_msg *sidr_req_msg;
2679 struct ib_cm_sidr_req_event_param *param;
2681 sidr_req_msg = (struct cm_sidr_req_msg *)
2682 work->mad_recv_wc->recv_buf.mad;
2683 param = &work->cm_event.param.sidr_req_rcvd;
2684 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
2685 param->listen_id = listen_id;
2686 param->port = work->port->port_num;
2687 work->cm_event.private_data = &sidr_req_msg->private_data;
2690 static int cm_sidr_req_handler(struct cm_work *work)
2692 struct ib_cm_id *cm_id;
2693 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2694 struct cm_sidr_req_msg *sidr_req_msg;
2696 unsigned long flags;
2698 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
2700 return PTR_ERR(cm_id);
2701 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2703 /* Record SGID/SLID and request ID for lookup. */
2704 sidr_req_msg = (struct cm_sidr_req_msg *)
2705 work->mad_recv_wc->recv_buf.mad;
2706 wc = work->mad_recv_wc->wc;
2707 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
2708 cm_id_priv->av.dgid.global.interface_id = 0;
2709 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2711 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2712 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2713 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2714 atomic_inc(&cm_id_priv->work_count);
2716 spin_lock_irqsave(&cm.lock, flags);
2717 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2718 if (cur_cm_id_priv) {
2719 spin_unlock_irqrestore(&cm.lock, flags);
2720 goto out; /* Duplicate message. */
2722 cur_cm_id_priv = cm_find_listen(cm_id->device,
2723 sidr_req_msg->service_id,
2724 sidr_req_msg->private_data);
2725 if (!cur_cm_id_priv) {
2726 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2727 spin_unlock_irqrestore(&cm.lock, flags);
2728 /* todo: reply with no match */
2729 goto out; /* No match. */
2731 atomic_inc(&cur_cm_id_priv->refcount);
2732 spin_unlock_irqrestore(&cm.lock, flags);
2734 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2735 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2736 cm_id_priv->id.service_id = sidr_req_msg->service_id;
2737 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
2739 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2740 cm_process_work(cm_id_priv, work);
2741 cm_deref_id(cur_cm_id_priv);
2744 ib_destroy_cm_id(&cm_id_priv->id);
2748 static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2749 struct cm_id_private *cm_id_priv,
2750 struct ib_cm_sidr_rep_param *param)
2752 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2754 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2755 sidr_rep_msg->status = param->status;
2756 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2757 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2758 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2760 if (param->info && param->info_length)
2761 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2763 if (param->private_data && param->private_data_len)
2764 memcpy(sidr_rep_msg->private_data, param->private_data,
2765 param->private_data_len);
2768 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2769 struct ib_cm_sidr_rep_param *param)
2771 struct cm_id_private *cm_id_priv;
2772 struct ib_mad_send_buf *msg;
2773 unsigned long flags;
2776 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2777 (param->private_data &&
2778 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2781 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2782 spin_lock_irqsave(&cm_id_priv->lock, flags);
2783 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2788 ret = cm_alloc_msg(cm_id_priv, &msg);
2792 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2794 ret = ib_post_send_mad(msg, NULL);
2796 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2800 cm_id->state = IB_CM_IDLE;
2801 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2803 spin_lock_irqsave(&cm.lock, flags);
2804 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2805 spin_unlock_irqrestore(&cm.lock, flags);
2808 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2811 EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2813 static void cm_format_sidr_rep_event(struct cm_work *work)
2815 struct cm_sidr_rep_msg *sidr_rep_msg;
2816 struct ib_cm_sidr_rep_event_param *param;
2818 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2819 work->mad_recv_wc->recv_buf.mad;
2820 param = &work->cm_event.param.sidr_rep_rcvd;
2821 param->status = sidr_rep_msg->status;
2822 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2823 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2824 param->info = &sidr_rep_msg->info;
2825 param->info_len = sidr_rep_msg->info_length;
2826 work->cm_event.private_data = &sidr_rep_msg->private_data;
2829 static int cm_sidr_rep_handler(struct cm_work *work)
2831 struct cm_sidr_rep_msg *sidr_rep_msg;
2832 struct cm_id_private *cm_id_priv;
2833 unsigned long flags;
2835 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2836 work->mad_recv_wc->recv_buf.mad;
2837 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2839 return -EINVAL; /* Unmatched reply. */
2841 spin_lock_irqsave(&cm_id_priv->lock, flags);
2842 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2843 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2846 cm_id_priv->id.state = IB_CM_IDLE;
2847 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2848 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2850 cm_format_sidr_rep_event(work);
2851 cm_process_work(cm_id_priv, work);
2854 cm_deref_id(cm_id_priv);
2858 static void cm_process_send_error(struct ib_mad_send_buf *msg,
2859 enum ib_wc_status wc_status)
2861 struct cm_id_private *cm_id_priv;
2862 struct ib_cm_event cm_event;
2863 enum ib_cm_state state;
2864 unsigned long flags;
2867 memset(&cm_event, 0, sizeof cm_event);
2868 cm_id_priv = msg->context[0];
2870 /* Discard old sends or ones without a response. */
2871 spin_lock_irqsave(&cm_id_priv->lock, flags);
2872 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2873 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2877 case IB_CM_REQ_SENT:
2878 case IB_CM_MRA_REQ_RCVD:
2879 cm_reset_to_idle(cm_id_priv);
2880 cm_event.event = IB_CM_REQ_ERROR;
2882 case IB_CM_REP_SENT:
2883 case IB_CM_MRA_REP_RCVD:
2884 cm_reset_to_idle(cm_id_priv);
2885 cm_event.event = IB_CM_REP_ERROR;
2887 case IB_CM_DREQ_SENT:
2888 cm_enter_timewait(cm_id_priv);
2889 cm_event.event = IB_CM_DREQ_ERROR;
2891 case IB_CM_SIDR_REQ_SENT:
2892 cm_id_priv->id.state = IB_CM_IDLE;
2893 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2898 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2899 cm_event.param.send_status = wc_status;
2901 /* No other events can occur on the cm_id at this point. */
2902 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2905 ib_destroy_cm_id(&cm_id_priv->id);
2908 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2912 static void cm_send_handler(struct ib_mad_agent *mad_agent,
2913 struct ib_mad_send_wc *mad_send_wc)
2915 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
2917 switch (mad_send_wc->status) {
2919 case IB_WC_WR_FLUSH_ERR:
2923 if (msg->context[0] && msg->context[1])
2924 cm_process_send_error(msg, mad_send_wc->status);
2931 static void cm_work_handler(void *data)
2933 struct cm_work *work = data;
2936 switch (work->cm_event.event) {
2937 case IB_CM_REQ_RECEIVED:
2938 ret = cm_req_handler(work);
2940 case IB_CM_MRA_RECEIVED:
2941 ret = cm_mra_handler(work);
2943 case IB_CM_REJ_RECEIVED:
2944 ret = cm_rej_handler(work);
2946 case IB_CM_REP_RECEIVED:
2947 ret = cm_rep_handler(work);
2949 case IB_CM_RTU_RECEIVED:
2950 ret = cm_rtu_handler(work);
2952 case IB_CM_USER_ESTABLISHED:
2953 ret = cm_establish_handler(work);
2955 case IB_CM_DREQ_RECEIVED:
2956 ret = cm_dreq_handler(work);
2958 case IB_CM_DREP_RECEIVED:
2959 ret = cm_drep_handler(work);
2961 case IB_CM_SIDR_REQ_RECEIVED:
2962 ret = cm_sidr_req_handler(work);
2964 case IB_CM_SIDR_REP_RECEIVED:
2965 ret = cm_sidr_rep_handler(work);
2967 case IB_CM_LAP_RECEIVED:
2968 ret = cm_lap_handler(work);
2970 case IB_CM_APR_RECEIVED:
2971 ret = cm_apr_handler(work);
2973 case IB_CM_TIMEWAIT_EXIT:
2974 ret = cm_timewait_handler(work);
2984 int ib_cm_establish(struct ib_cm_id *cm_id)
2986 struct cm_id_private *cm_id_priv;
2987 struct cm_work *work;
2988 unsigned long flags;
2991 work = kmalloc(sizeof *work, GFP_ATOMIC);
2995 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2996 spin_lock_irqsave(&cm_id_priv->lock, flags);
2997 switch (cm_id->state)
2999 case IB_CM_REP_SENT:
3000 case IB_CM_MRA_REP_RCVD:
3001 cm_id->state = IB_CM_ESTABLISHED;
3003 case IB_CM_ESTABLISHED:
3010 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3018 * The CM worker thread may try to destroy the cm_id before it
3019 * can execute this work item. To prevent potential deadlock,
3020 * we need to find the cm_id once we're in the context of the
3021 * worker thread, rather than holding a reference on it.
3023 INIT_WORK(&work->work, cm_work_handler, work);
3024 work->local_id = cm_id->local_id;
3025 work->remote_id = cm_id->remote_id;
3026 work->mad_recv_wc = NULL;
3027 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3028 queue_work(cm.wq, &work->work);
3032 EXPORT_SYMBOL(ib_cm_establish);
3034 static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3035 struct ib_mad_recv_wc *mad_recv_wc)
3037 struct cm_work *work;
3038 enum ib_cm_event_type event;
3041 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3042 case CM_REQ_ATTR_ID:
3043 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3044 alt_local_lid != 0);
3045 event = IB_CM_REQ_RECEIVED;
3047 case CM_MRA_ATTR_ID:
3048 event = IB_CM_MRA_RECEIVED;
3050 case CM_REJ_ATTR_ID:
3051 event = IB_CM_REJ_RECEIVED;
3053 case CM_REP_ATTR_ID:
3054 event = IB_CM_REP_RECEIVED;
3056 case CM_RTU_ATTR_ID:
3057 event = IB_CM_RTU_RECEIVED;
3059 case CM_DREQ_ATTR_ID:
3060 event = IB_CM_DREQ_RECEIVED;
3062 case CM_DREP_ATTR_ID:
3063 event = IB_CM_DREP_RECEIVED;
3065 case CM_SIDR_REQ_ATTR_ID:
3066 event = IB_CM_SIDR_REQ_RECEIVED;
3068 case CM_SIDR_REP_ATTR_ID:
3069 event = IB_CM_SIDR_REP_RECEIVED;
3071 case CM_LAP_ATTR_ID:
3073 event = IB_CM_LAP_RECEIVED;
3075 case CM_APR_ATTR_ID:
3076 event = IB_CM_APR_RECEIVED;
3079 ib_free_recv_mad(mad_recv_wc);
3083 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3086 ib_free_recv_mad(mad_recv_wc);
3090 INIT_WORK(&work->work, cm_work_handler, work);
3091 work->cm_event.event = event;
3092 work->mad_recv_wc = mad_recv_wc;
3093 work->port = (struct cm_port *)mad_agent->context;
3094 queue_work(cm.wq, &work->work);
3097 static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3098 struct ib_qp_attr *qp_attr,
3101 unsigned long flags;
3104 spin_lock_irqsave(&cm_id_priv->lock, flags);
3105 switch (cm_id_priv->id.state) {
3106 case IB_CM_REQ_SENT:
3107 case IB_CM_MRA_REQ_RCVD:
3108 case IB_CM_REQ_RCVD:
3109 case IB_CM_MRA_REQ_SENT:
3110 case IB_CM_REP_RCVD:
3111 case IB_CM_MRA_REP_SENT:
3112 case IB_CM_REP_SENT:
3113 case IB_CM_MRA_REP_RCVD:
3114 case IB_CM_ESTABLISHED:
3115 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3116 IB_QP_PKEY_INDEX | IB_QP_PORT;
3117 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE |
3118 IB_ACCESS_REMOTE_WRITE;
3119 if (cm_id_priv->responder_resources)
3120 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ;
3121 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3122 qp_attr->port_num = cm_id_priv->av.port->port_num;
3129 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3133 static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3134 struct ib_qp_attr *qp_attr,
3137 unsigned long flags;
3140 spin_lock_irqsave(&cm_id_priv->lock, flags);
3141 switch (cm_id_priv->id.state) {
3142 case IB_CM_REQ_RCVD:
3143 case IB_CM_MRA_REQ_SENT:
3144 case IB_CM_REP_RCVD:
3145 case IB_CM_MRA_REP_SENT:
3146 case IB_CM_REP_SENT:
3147 case IB_CM_MRA_REP_RCVD:
3148 case IB_CM_ESTABLISHED:
3149 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
3150 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
3151 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3152 qp_attr->path_mtu = cm_id_priv->path_mtu;
3153 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3154 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
3155 if (cm_id_priv->qp_type == IB_QPT_RC) {
3156 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3157 IB_QP_MIN_RNR_TIMER;
3158 qp_attr->max_dest_rd_atomic =
3159 cm_id_priv->responder_resources;
3160 qp_attr->min_rnr_timer = 0;
3162 if (cm_id_priv->alt_av.ah_attr.dlid) {
3163 *qp_attr_mask |= IB_QP_ALT_PATH;
3164 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3172 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3176 static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3177 struct ib_qp_attr *qp_attr,
3180 unsigned long flags;
3183 spin_lock_irqsave(&cm_id_priv->lock, flags);
3184 switch (cm_id_priv->id.state) {
3185 case IB_CM_REP_RCVD:
3186 case IB_CM_MRA_REP_SENT:
3187 case IB_CM_REP_SENT:
3188 case IB_CM_MRA_REP_RCVD:
3189 case IB_CM_ESTABLISHED:
3190 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
3191 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
3192 if (cm_id_priv->qp_type == IB_QPT_RC) {
3193 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3195 IB_QP_MAX_QP_RD_ATOMIC;
3196 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3197 qp_attr->retry_cnt = cm_id_priv->retry_count;
3198 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3199 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3201 if (cm_id_priv->alt_av.ah_attr.dlid) {
3202 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3203 qp_attr->path_mig_state = IB_MIG_REARM;
3211 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3215 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3216 struct ib_qp_attr *qp_attr,
3219 struct cm_id_private *cm_id_priv;
3222 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3223 switch (qp_attr->qp_state) {
3225 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3228 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3231 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3239 EXPORT_SYMBOL(ib_cm_init_qp_attr);
3241 static void cm_add_one(struct ib_device *device)
3243 struct cm_device *cm_dev;
3244 struct cm_port *port;
3245 struct ib_mad_reg_req reg_req = {
3246 .mgmt_class = IB_MGMT_CLASS_CM,
3247 .mgmt_class_version = IB_CM_CLASS_VERSION
3249 struct ib_port_modify port_modify = {
3250 .set_port_cap_mask = IB_PORT_CM_SUP
3252 unsigned long flags;
3256 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3257 device->phys_port_cnt, GFP_KERNEL);
3261 cm_dev->device = device;
3262 cm_dev->ca_guid = device->node_guid;
3264 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3265 for (i = 1; i <= device->phys_port_cnt; i++) {
3266 port = &cm_dev->port[i-1];
3267 port->cm_dev = cm_dev;
3269 port->mad_agent = ib_register_mad_agent(device, i,
3276 if (IS_ERR(port->mad_agent))
3279 ret = ib_modify_port(device, i, 0, &port_modify);
3283 ib_set_client_data(device, &cm_client, cm_dev);
3285 write_lock_irqsave(&cm.device_lock, flags);
3286 list_add_tail(&cm_dev->list, &cm.device_list);
3287 write_unlock_irqrestore(&cm.device_lock, flags);
3291 ib_unregister_mad_agent(port->mad_agent);
3293 port_modify.set_port_cap_mask = 0;
3294 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3296 port = &cm_dev->port[i-1];
3297 ib_modify_port(device, port->port_num, 0, &port_modify);
3298 ib_unregister_mad_agent(port->mad_agent);
3303 static void cm_remove_one(struct ib_device *device)
3305 struct cm_device *cm_dev;
3306 struct cm_port *port;
3307 struct ib_port_modify port_modify = {
3308 .clr_port_cap_mask = IB_PORT_CM_SUP
3310 unsigned long flags;
3313 cm_dev = ib_get_client_data(device, &cm_client);
3317 write_lock_irqsave(&cm.device_lock, flags);
3318 list_del(&cm_dev->list);
3319 write_unlock_irqrestore(&cm.device_lock, flags);
3321 for (i = 1; i <= device->phys_port_cnt; i++) {
3322 port = &cm_dev->port[i-1];
3323 ib_modify_port(device, port->port_num, 0, &port_modify);
3324 ib_unregister_mad_agent(port->mad_agent);
3329 static int __init ib_cm_init(void)
3333 memset(&cm, 0, sizeof cm);
3334 INIT_LIST_HEAD(&cm.device_list);
3335 rwlock_init(&cm.device_lock);
3336 spin_lock_init(&cm.lock);
3337 cm.listen_service_table = RB_ROOT;
3338 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3339 cm.remote_id_table = RB_ROOT;
3340 cm.remote_qp_table = RB_ROOT;
3341 cm.remote_sidr_table = RB_ROOT;
3342 idr_init(&cm.local_id_table);
3343 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3345 cm.wq = create_workqueue("ib_cm");
3349 ret = ib_register_client(&cm_client);
3355 destroy_workqueue(cm.wq);
3359 static void __exit ib_cm_cleanup(void)
3361 flush_workqueue(cm.wq);
3362 destroy_workqueue(cm.wq);
3363 ib_unregister_client(&cm_client);
3364 idr_destroy(&cm.local_id_table);
3367 module_init(ib_cm_init);
3368 module_exit(ib_cm_cleanup);