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 2821 2005-07-08 17:07:28Z sean.hefty $
37 #include <linux/dma-mapping.h>
38 #include <linux/err.h>
39 #include <linux/idr.h>
40 #include <linux/interrupt.h>
41 #include <linux/pci.h>
42 #include <linux/rbtree.h>
43 #include <linux/spinlock.h>
44 #include <linux/workqueue.h>
46 #include <rdma/ib_cache.h>
47 #include <rdma/ib_cm.h>
50 MODULE_AUTHOR("Sean Hefty");
51 MODULE_DESCRIPTION("InfiniBand CM");
52 MODULE_LICENSE("Dual BSD/GPL");
54 static void cm_add_one(struct ib_device *device);
55 static void cm_remove_one(struct ib_device *device);
57 static struct ib_client cm_client = {
60 .remove = cm_remove_one
65 struct list_head device_list;
67 struct rb_root listen_service_table;
68 u64 listen_service_id;
69 /* struct rb_root peer_service_table; todo: fix peer to peer */
70 struct rb_root remote_qp_table;
71 struct rb_root remote_id_table;
72 struct rb_root remote_sidr_table;
73 struct idr local_id_table;
74 struct workqueue_struct *wq;
78 struct cm_device *cm_dev;
79 struct ib_mad_agent *mad_agent;
84 struct list_head list;
85 struct ib_device *device;
87 struct cm_port port[0];
93 struct ib_ah_attr ah_attr;
99 struct work_struct work;
100 struct list_head list;
101 struct cm_port *port;
102 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
103 __be32 local_id; /* Established / timewait */
105 struct ib_cm_event cm_event;
106 struct ib_sa_path_rec path[0];
109 struct cm_timewait_info {
110 struct cm_work work; /* Must be first. */
111 struct rb_node remote_qp_node;
112 struct rb_node remote_id_node;
113 __be64 remote_ca_guid;
115 u8 inserted_remote_qp;
116 u8 inserted_remote_id;
119 struct cm_id_private {
122 struct rb_node service_node;
123 struct rb_node sidr_id_node;
125 wait_queue_head_t wait;
128 struct ib_mad_send_buf *msg;
129 struct cm_timewait_info *timewait_info;
130 /* todo: use alternate port on send failure */
141 enum ib_mtu path_mtu;
145 u8 responder_resources;
147 u8 local_ack_timeout;
152 struct list_head work_list;
156 static void cm_work_handler(void *data);
158 static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
160 if (atomic_dec_and_test(&cm_id_priv->refcount))
161 wake_up(&cm_id_priv->wait);
164 static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
165 struct ib_mad_send_buf **msg)
167 struct ib_mad_agent *mad_agent;
168 struct ib_mad_send_buf *m;
171 mad_agent = cm_id_priv->av.port->mad_agent;
172 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
176 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
177 cm_id_priv->av.pkey_index,
178 ah, 0, sizeof(struct ib_mad_hdr),
179 sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr),
186 /* Timeout set by caller if response is expected. */
187 m->send_wr.wr.ud.retries = cm_id_priv->max_cm_retries;
189 atomic_inc(&cm_id_priv->refcount);
190 m->context[0] = cm_id_priv;
195 static int cm_alloc_response_msg(struct cm_port *port,
196 struct ib_mad_recv_wc *mad_recv_wc,
197 struct ib_mad_send_buf **msg)
199 struct ib_mad_send_buf *m;
202 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
203 mad_recv_wc->recv_buf.grh, port->port_num);
207 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
208 ah, 0, sizeof(struct ib_mad_hdr),
209 sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr),
219 static void cm_free_msg(struct ib_mad_send_buf *msg)
221 ib_destroy_ah(msg->send_wr.wr.ud.ah);
223 cm_deref_id(msg->context[0]);
224 ib_free_send_mad(msg);
227 static void * cm_copy_private_data(const void *private_data,
232 if (!private_data || !private_data_len)
235 data = kmalloc(private_data_len, GFP_KERNEL);
237 return ERR_PTR(-ENOMEM);
239 memcpy(data, private_data, private_data_len);
243 static void cm_set_private_data(struct cm_id_private *cm_id_priv,
244 void *private_data, u8 private_data_len)
246 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
247 kfree(cm_id_priv->private_data);
249 cm_id_priv->private_data = private_data;
250 cm_id_priv->private_data_len = private_data_len;
253 static void cm_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num,
254 u16 dlid, u8 sl, u16 src_path_bits)
256 memset(ah_attr, 0, sizeof ah_attr);
257 ah_attr->dlid = dlid;
259 ah_attr->src_path_bits = src_path_bits;
260 ah_attr->port_num = port_num;
263 static void cm_init_av_for_response(struct cm_port *port,
264 struct ib_wc *wc, struct cm_av *av)
267 av->pkey_index = wc->pkey_index;
268 cm_set_ah_attr(&av->ah_attr, port->port_num, wc->slid,
269 wc->sl, wc->dlid_path_bits);
272 static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
274 struct cm_device *cm_dev;
275 struct cm_port *port = NULL;
280 read_lock_irqsave(&cm.device_lock, flags);
281 list_for_each_entry(cm_dev, &cm.device_list, list) {
282 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
284 port = &cm_dev->port[p-1];
288 read_unlock_irqrestore(&cm.device_lock, flags);
293 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
294 be16_to_cpu(path->pkey), &av->pkey_index);
299 cm_set_ah_attr(&av->ah_attr, av->port->port_num,
300 be16_to_cpu(path->dlid), path->sl,
301 be16_to_cpu(path->slid) & 0x7F);
302 av->packet_life_time = path->packet_life_time;
306 static int cm_alloc_id(struct cm_id_private *cm_id_priv)
312 spin_lock_irqsave(&cm.lock, flags);
313 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 1,
314 (__force int *) &cm_id_priv->id.local_id);
315 spin_unlock_irqrestore(&cm.lock, flags);
316 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
320 static void cm_free_id(__be32 local_id)
324 spin_lock_irqsave(&cm.lock, flags);
325 idr_remove(&cm.local_id_table, (__force int) local_id);
326 spin_unlock_irqrestore(&cm.lock, flags);
329 static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
331 struct cm_id_private *cm_id_priv;
333 cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id);
335 if (cm_id_priv->id.remote_id == remote_id)
336 atomic_inc(&cm_id_priv->refcount);
344 static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
346 struct cm_id_private *cm_id_priv;
349 spin_lock_irqsave(&cm.lock, flags);
350 cm_id_priv = cm_get_id(local_id, remote_id);
351 spin_unlock_irqrestore(&cm.lock, flags);
356 static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
358 struct rb_node **link = &cm.listen_service_table.rb_node;
359 struct rb_node *parent = NULL;
360 struct cm_id_private *cur_cm_id_priv;
361 __be64 service_id = cm_id_priv->id.service_id;
362 __be64 service_mask = cm_id_priv->id.service_mask;
366 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
368 if ((cur_cm_id_priv->id.service_mask & service_id) ==
369 (service_mask & cur_cm_id_priv->id.service_id) &&
370 (cm_id_priv->id.device == cur_cm_id_priv->id.device))
371 return cur_cm_id_priv;
373 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
374 link = &(*link)->rb_left;
375 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
376 link = &(*link)->rb_right;
377 else if (service_id < cur_cm_id_priv->id.service_id)
378 link = &(*link)->rb_left;
380 link = &(*link)->rb_right;
382 rb_link_node(&cm_id_priv->service_node, parent, link);
383 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
387 static struct cm_id_private * cm_find_listen(struct ib_device *device,
390 struct rb_node *node = cm.listen_service_table.rb_node;
391 struct cm_id_private *cm_id_priv;
394 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
395 if ((cm_id_priv->id.service_mask & service_id) ==
396 cm_id_priv->id.service_id &&
397 (cm_id_priv->id.device == device))
400 if (device < cm_id_priv->id.device)
401 node = node->rb_left;
402 else if (device > cm_id_priv->id.device)
403 node = node->rb_right;
404 else if (service_id < cm_id_priv->id.service_id)
405 node = node->rb_left;
407 node = node->rb_right;
412 static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
415 struct rb_node **link = &cm.remote_id_table.rb_node;
416 struct rb_node *parent = NULL;
417 struct cm_timewait_info *cur_timewait_info;
418 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
419 __be32 remote_id = timewait_info->work.remote_id;
423 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
425 if (remote_id < cur_timewait_info->work.remote_id)
426 link = &(*link)->rb_left;
427 else if (remote_id > cur_timewait_info->work.remote_id)
428 link = &(*link)->rb_right;
429 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
430 link = &(*link)->rb_left;
431 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
432 link = &(*link)->rb_right;
434 return cur_timewait_info;
436 timewait_info->inserted_remote_id = 1;
437 rb_link_node(&timewait_info->remote_id_node, parent, link);
438 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
442 static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
445 struct rb_node *node = cm.remote_id_table.rb_node;
446 struct cm_timewait_info *timewait_info;
449 timewait_info = rb_entry(node, struct cm_timewait_info,
451 if (remote_id < timewait_info->work.remote_id)
452 node = node->rb_left;
453 else if (remote_id > timewait_info->work.remote_id)
454 node = node->rb_right;
455 else if (remote_ca_guid < timewait_info->remote_ca_guid)
456 node = node->rb_left;
457 else if (remote_ca_guid > timewait_info->remote_ca_guid)
458 node = node->rb_right;
460 return timewait_info;
465 static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
468 struct rb_node **link = &cm.remote_qp_table.rb_node;
469 struct rb_node *parent = NULL;
470 struct cm_timewait_info *cur_timewait_info;
471 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
472 __be32 remote_qpn = timewait_info->remote_qpn;
476 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
478 if (remote_qpn < cur_timewait_info->remote_qpn)
479 link = &(*link)->rb_left;
480 else if (remote_qpn > cur_timewait_info->remote_qpn)
481 link = &(*link)->rb_right;
482 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
483 link = &(*link)->rb_left;
484 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
485 link = &(*link)->rb_right;
487 return cur_timewait_info;
489 timewait_info->inserted_remote_qp = 1;
490 rb_link_node(&timewait_info->remote_qp_node, parent, link);
491 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
495 static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
498 struct rb_node **link = &cm.remote_sidr_table.rb_node;
499 struct rb_node *parent = NULL;
500 struct cm_id_private *cur_cm_id_priv;
501 union ib_gid *port_gid = &cm_id_priv->av.dgid;
502 __be32 remote_id = cm_id_priv->id.remote_id;
506 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
508 if (remote_id < cur_cm_id_priv->id.remote_id)
509 link = &(*link)->rb_left;
510 else if (remote_id > cur_cm_id_priv->id.remote_id)
511 link = &(*link)->rb_right;
514 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
517 link = &(*link)->rb_left;
519 link = &(*link)->rb_right;
521 return cur_cm_id_priv;
524 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
525 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
529 static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
530 enum ib_cm_sidr_status status)
532 struct ib_cm_sidr_rep_param param;
534 memset(¶m, 0, sizeof param);
535 param.status = status;
536 ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m);
539 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
540 ib_cm_handler cm_handler,
543 struct cm_id_private *cm_id_priv;
546 cm_id_priv = kmalloc(sizeof *cm_id_priv, GFP_KERNEL);
548 return ERR_PTR(-ENOMEM);
550 memset(cm_id_priv, 0, sizeof *cm_id_priv);
551 cm_id_priv->id.state = IB_CM_IDLE;
552 cm_id_priv->id.device = device;
553 cm_id_priv->id.cm_handler = cm_handler;
554 cm_id_priv->id.context = context;
555 cm_id_priv->id.remote_cm_qpn = 1;
556 ret = cm_alloc_id(cm_id_priv);
560 spin_lock_init(&cm_id_priv->lock);
561 init_waitqueue_head(&cm_id_priv->wait);
562 INIT_LIST_HEAD(&cm_id_priv->work_list);
563 atomic_set(&cm_id_priv->work_count, -1);
564 atomic_set(&cm_id_priv->refcount, 1);
565 return &cm_id_priv->id;
569 return ERR_PTR(-ENOMEM);
571 EXPORT_SYMBOL(ib_create_cm_id);
573 static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
575 struct cm_work *work;
577 if (list_empty(&cm_id_priv->work_list))
580 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
581 list_del(&work->list);
585 static void cm_free_work(struct cm_work *work)
587 if (work->mad_recv_wc)
588 ib_free_recv_mad(work->mad_recv_wc);
592 static inline int cm_convert_to_ms(int iba_time)
594 /* approximate conversion to ms from 4.096us x 2^iba_time */
595 return 1 << max(iba_time - 8, 0);
598 static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
602 if (!timewait_info->inserted_remote_id &&
603 !timewait_info->inserted_remote_qp)
606 spin_lock_irqsave(&cm.lock, flags);
607 if (timewait_info->inserted_remote_id) {
608 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
609 timewait_info->inserted_remote_id = 0;
612 if (timewait_info->inserted_remote_qp) {
613 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
614 timewait_info->inserted_remote_qp = 0;
616 spin_unlock_irqrestore(&cm.lock, flags);
619 static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
621 struct cm_timewait_info *timewait_info;
623 timewait_info = kmalloc(sizeof *timewait_info, GFP_KERNEL);
625 return ERR_PTR(-ENOMEM);
626 memset(timewait_info, 0, sizeof *timewait_info);
628 timewait_info->work.local_id = local_id;
629 INIT_WORK(&timewait_info->work.work, cm_work_handler,
630 &timewait_info->work);
631 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
632 return timewait_info;
635 static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
640 * The cm_id could be destroyed by the user before we exit timewait.
641 * To protect against this, we search for the cm_id after exiting
642 * timewait before notifying the user that we've exited timewait.
644 cm_id_priv->id.state = IB_CM_TIMEWAIT;
645 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
646 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
647 msecs_to_jiffies(wait_time));
648 cm_id_priv->timewait_info = NULL;
651 static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
653 cm_id_priv->id.state = IB_CM_IDLE;
654 if (cm_id_priv->timewait_info) {
655 cm_cleanup_timewait(cm_id_priv->timewait_info);
656 kfree(cm_id_priv->timewait_info);
657 cm_id_priv->timewait_info = NULL;
661 void ib_destroy_cm_id(struct ib_cm_id *cm_id)
663 struct cm_id_private *cm_id_priv;
664 struct cm_work *work;
667 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
669 spin_lock_irqsave(&cm_id_priv->lock, flags);
670 switch (cm_id->state) {
672 cm_id->state = IB_CM_IDLE;
673 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
674 spin_lock_irqsave(&cm.lock, flags);
675 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
676 spin_unlock_irqrestore(&cm.lock, flags);
678 case IB_CM_SIDR_REQ_SENT:
679 cm_id->state = IB_CM_IDLE;
680 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
681 (unsigned long) cm_id_priv->msg);
682 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
684 case IB_CM_SIDR_REQ_RCVD:
685 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
686 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
689 case IB_CM_MRA_REQ_RCVD:
691 case IB_CM_MRA_REP_RCVD:
692 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
693 (unsigned long) cm_id_priv->msg);
696 case IB_CM_MRA_REQ_SENT:
698 case IB_CM_MRA_REP_SENT:
699 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
700 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
701 &cm_id_priv->av.port->cm_dev->ca_guid,
702 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
705 case IB_CM_ESTABLISHED:
706 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
707 ib_send_cm_dreq(cm_id, NULL, 0);
709 case IB_CM_DREQ_SENT:
710 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
711 (unsigned long) cm_id_priv->msg);
712 cm_enter_timewait(cm_id_priv);
713 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
715 case IB_CM_DREQ_RCVD:
716 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
717 ib_send_cm_drep(cm_id, NULL, 0);
720 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
724 cm_free_id(cm_id->local_id);
725 atomic_dec(&cm_id_priv->refcount);
726 wait_event(cm_id_priv->wait, !atomic_read(&cm_id_priv->refcount));
727 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
729 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
730 kfree(cm_id_priv->private_data);
733 EXPORT_SYMBOL(ib_destroy_cm_id);
735 int ib_cm_listen(struct ib_cm_id *cm_id,
739 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
743 service_mask = service_mask ? service_mask :
744 __constant_cpu_to_be64(~0ULL);
745 service_id &= service_mask;
746 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
747 (service_id != IB_CM_ASSIGN_SERVICE_ID))
750 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
751 BUG_ON(cm_id->state != IB_CM_IDLE);
753 cm_id->state = IB_CM_LISTEN;
755 spin_lock_irqsave(&cm.lock, flags);
756 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
757 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
758 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
760 cm_id->service_id = service_id;
761 cm_id->service_mask = service_mask;
763 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
764 spin_unlock_irqrestore(&cm.lock, flags);
766 if (cur_cm_id_priv) {
767 cm_id->state = IB_CM_IDLE;
772 EXPORT_SYMBOL(ib_cm_listen);
774 static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
775 enum cm_msg_sequence msg_seq)
779 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
780 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
782 return cpu_to_be64(hi_tid | low_tid);
785 static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
786 __be16 attr_id, __be64 tid)
788 hdr->base_version = IB_MGMT_BASE_VERSION;
789 hdr->mgmt_class = IB_MGMT_CLASS_CM;
790 hdr->class_version = IB_CM_CLASS_VERSION;
791 hdr->method = IB_MGMT_METHOD_SEND;
792 hdr->attr_id = attr_id;
796 static void cm_format_req(struct cm_req_msg *req_msg,
797 struct cm_id_private *cm_id_priv,
798 struct ib_cm_req_param *param)
800 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
801 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
803 req_msg->local_comm_id = cm_id_priv->id.local_id;
804 req_msg->service_id = param->service_id;
805 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
806 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
807 cm_req_set_resp_res(req_msg, param->responder_resources);
808 cm_req_set_init_depth(req_msg, param->initiator_depth);
809 cm_req_set_remote_resp_timeout(req_msg,
810 param->remote_cm_response_timeout);
811 cm_req_set_qp_type(req_msg, param->qp_type);
812 cm_req_set_flow_ctrl(req_msg, param->flow_control);
813 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
814 cm_req_set_local_resp_timeout(req_msg,
815 param->local_cm_response_timeout);
816 cm_req_set_retry_count(req_msg, param->retry_count);
817 req_msg->pkey = param->primary_path->pkey;
818 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
819 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
820 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
821 cm_req_set_srq(req_msg, param->srq);
823 req_msg->primary_local_lid = param->primary_path->slid;
824 req_msg->primary_remote_lid = param->primary_path->dlid;
825 req_msg->primary_local_gid = param->primary_path->sgid;
826 req_msg->primary_remote_gid = param->primary_path->dgid;
827 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
828 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
829 req_msg->primary_traffic_class = param->primary_path->traffic_class;
830 req_msg->primary_hop_limit = param->primary_path->hop_limit;
831 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
832 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
833 cm_req_set_primary_local_ack_timeout(req_msg,
834 min(31, param->primary_path->packet_life_time + 1));
836 if (param->alternate_path) {
837 req_msg->alt_local_lid = param->alternate_path->slid;
838 req_msg->alt_remote_lid = param->alternate_path->dlid;
839 req_msg->alt_local_gid = param->alternate_path->sgid;
840 req_msg->alt_remote_gid = param->alternate_path->dgid;
841 cm_req_set_alt_flow_label(req_msg,
842 param->alternate_path->flow_label);
843 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
844 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
845 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
846 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
847 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
848 cm_req_set_alt_local_ack_timeout(req_msg,
849 min(31, param->alternate_path->packet_life_time + 1));
852 if (param->private_data && param->private_data_len)
853 memcpy(req_msg->private_data, param->private_data,
854 param->private_data_len);
857 static inline int cm_validate_req_param(struct ib_cm_req_param *param)
859 /* peer-to-peer not supported */
860 if (param->peer_to_peer)
863 if (!param->primary_path)
866 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
869 if (param->private_data &&
870 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
873 if (param->alternate_path &&
874 (param->alternate_path->pkey != param->primary_path->pkey ||
875 param->alternate_path->mtu != param->primary_path->mtu))
881 int ib_send_cm_req(struct ib_cm_id *cm_id,
882 struct ib_cm_req_param *param)
884 struct cm_id_private *cm_id_priv;
885 struct ib_send_wr *bad_send_wr;
886 struct cm_req_msg *req_msg;
890 ret = cm_validate_req_param(param);
894 /* Verify that we're not in timewait. */
895 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
896 spin_lock_irqsave(&cm_id_priv->lock, flags);
897 if (cm_id->state != IB_CM_IDLE) {
898 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
902 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
904 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
906 if (IS_ERR(cm_id_priv->timewait_info))
909 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
912 if (param->alternate_path) {
913 ret = cm_init_av_by_path(param->alternate_path,
914 &cm_id_priv->alt_av);
918 cm_id->service_id = param->service_id;
919 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
920 cm_id_priv->timeout_ms = cm_convert_to_ms(
921 param->primary_path->packet_life_time) * 2 +
923 param->remote_cm_response_timeout);
924 cm_id_priv->max_cm_retries = param->max_cm_retries;
925 cm_id_priv->initiator_depth = param->initiator_depth;
926 cm_id_priv->responder_resources = param->responder_resources;
927 cm_id_priv->retry_count = param->retry_count;
928 cm_id_priv->path_mtu = param->primary_path->mtu;
930 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
934 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
935 cm_format_req(req_msg, cm_id_priv, param);
936 cm_id_priv->tid = req_msg->hdr.tid;
937 cm_id_priv->msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
938 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
940 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
941 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
942 cm_id_priv->local_ack_timeout =
943 cm_req_get_primary_local_ack_timeout(req_msg);
945 spin_lock_irqsave(&cm_id_priv->lock, flags);
946 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
947 &cm_id_priv->msg->send_wr, &bad_send_wr);
949 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
952 BUG_ON(cm_id->state != IB_CM_IDLE);
953 cm_id->state = IB_CM_REQ_SENT;
954 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
957 error2: cm_free_msg(cm_id_priv->msg);
958 error1: kfree(cm_id_priv->timewait_info);
961 EXPORT_SYMBOL(ib_send_cm_req);
963 static int cm_issue_rej(struct cm_port *port,
964 struct ib_mad_recv_wc *mad_recv_wc,
965 enum ib_cm_rej_reason reason,
966 enum cm_msg_response msg_rejected,
967 void *ari, u8 ari_length)
969 struct ib_mad_send_buf *msg = NULL;
970 struct ib_send_wr *bad_send_wr;
971 struct cm_rej_msg *rej_msg, *rcv_msg;
974 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
978 /* We just need common CM header information. Cast to any message. */
979 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
980 rej_msg = (struct cm_rej_msg *) msg->mad;
982 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
983 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
984 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
985 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
986 rej_msg->reason = cpu_to_be16(reason);
988 if (ari && ari_length) {
989 cm_rej_set_reject_info_len(rej_msg, ari_length);
990 memcpy(rej_msg->ari, ari, ari_length);
993 ret = ib_post_send_mad(port->mad_agent, &msg->send_wr, &bad_send_wr);
1000 static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1001 __be32 local_qpn, __be32 remote_qpn)
1003 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1004 ((local_ca_guid == remote_ca_guid) &&
1005 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1008 static inline void cm_format_paths_from_req(struct cm_req_msg *req_msg,
1009 struct ib_sa_path_rec *primary_path,
1010 struct ib_sa_path_rec *alt_path)
1012 memset(primary_path, 0, sizeof *primary_path);
1013 primary_path->dgid = req_msg->primary_local_gid;
1014 primary_path->sgid = req_msg->primary_remote_gid;
1015 primary_path->dlid = req_msg->primary_local_lid;
1016 primary_path->slid = req_msg->primary_remote_lid;
1017 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1018 primary_path->hop_limit = req_msg->primary_hop_limit;
1019 primary_path->traffic_class = req_msg->primary_traffic_class;
1020 primary_path->reversible = 1;
1021 primary_path->pkey = req_msg->pkey;
1022 primary_path->sl = cm_req_get_primary_sl(req_msg);
1023 primary_path->mtu_selector = IB_SA_EQ;
1024 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1025 primary_path->rate_selector = IB_SA_EQ;
1026 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1027 primary_path->packet_life_time_selector = IB_SA_EQ;
1028 primary_path->packet_life_time =
1029 cm_req_get_primary_local_ack_timeout(req_msg);
1030 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1032 if (req_msg->alt_local_lid) {
1033 memset(alt_path, 0, sizeof *alt_path);
1034 alt_path->dgid = req_msg->alt_local_gid;
1035 alt_path->sgid = req_msg->alt_remote_gid;
1036 alt_path->dlid = req_msg->alt_local_lid;
1037 alt_path->slid = req_msg->alt_remote_lid;
1038 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1039 alt_path->hop_limit = req_msg->alt_hop_limit;
1040 alt_path->traffic_class = req_msg->alt_traffic_class;
1041 alt_path->reversible = 1;
1042 alt_path->pkey = req_msg->pkey;
1043 alt_path->sl = cm_req_get_alt_sl(req_msg);
1044 alt_path->mtu_selector = IB_SA_EQ;
1045 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1046 alt_path->rate_selector = IB_SA_EQ;
1047 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1048 alt_path->packet_life_time_selector = IB_SA_EQ;
1049 alt_path->packet_life_time =
1050 cm_req_get_alt_local_ack_timeout(req_msg);
1051 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1055 static void cm_format_req_event(struct cm_work *work,
1056 struct cm_id_private *cm_id_priv,
1057 struct ib_cm_id *listen_id)
1059 struct cm_req_msg *req_msg;
1060 struct ib_cm_req_event_param *param;
1062 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1063 param = &work->cm_event.param.req_rcvd;
1064 param->listen_id = listen_id;
1065 param->port = cm_id_priv->av.port->port_num;
1066 param->primary_path = &work->path[0];
1067 if (req_msg->alt_local_lid)
1068 param->alternate_path = &work->path[1];
1070 param->alternate_path = NULL;
1071 param->remote_ca_guid = req_msg->local_ca_guid;
1072 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1073 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1074 param->qp_type = cm_req_get_qp_type(req_msg);
1075 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1076 param->responder_resources = cm_req_get_init_depth(req_msg);
1077 param->initiator_depth = cm_req_get_resp_res(req_msg);
1078 param->local_cm_response_timeout =
1079 cm_req_get_remote_resp_timeout(req_msg);
1080 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1081 param->remote_cm_response_timeout =
1082 cm_req_get_local_resp_timeout(req_msg);
1083 param->retry_count = cm_req_get_retry_count(req_msg);
1084 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1085 param->srq = cm_req_get_srq(req_msg);
1086 work->cm_event.private_data = &req_msg->private_data;
1089 static void cm_process_work(struct cm_id_private *cm_id_priv,
1090 struct cm_work *work)
1092 unsigned long flags;
1095 /* We will typically only have the current event to report. */
1096 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1099 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1100 spin_lock_irqsave(&cm_id_priv->lock, flags);
1101 work = cm_dequeue_work(cm_id_priv);
1102 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1104 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1108 cm_deref_id(cm_id_priv);
1110 ib_destroy_cm_id(&cm_id_priv->id);
1113 static void cm_format_mra(struct cm_mra_msg *mra_msg,
1114 struct cm_id_private *cm_id_priv,
1115 enum cm_msg_response msg_mraed, u8 service_timeout,
1116 const void *private_data, u8 private_data_len)
1118 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1119 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1120 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1121 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1122 cm_mra_set_service_timeout(mra_msg, service_timeout);
1124 if (private_data && private_data_len)
1125 memcpy(mra_msg->private_data, private_data, private_data_len);
1128 static void cm_format_rej(struct cm_rej_msg *rej_msg,
1129 struct cm_id_private *cm_id_priv,
1130 enum ib_cm_rej_reason reason,
1133 const void *private_data,
1134 u8 private_data_len)
1136 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1137 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1139 switch(cm_id_priv->id.state) {
1140 case IB_CM_REQ_RCVD:
1141 rej_msg->local_comm_id = 0;
1142 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1144 case IB_CM_MRA_REQ_SENT:
1145 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1146 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1148 case IB_CM_REP_RCVD:
1149 case IB_CM_MRA_REP_SENT:
1150 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1151 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1154 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1155 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1159 rej_msg->reason = cpu_to_be16(reason);
1160 if (ari && ari_length) {
1161 cm_rej_set_reject_info_len(rej_msg, ari_length);
1162 memcpy(rej_msg->ari, ari, ari_length);
1165 if (private_data && private_data_len)
1166 memcpy(rej_msg->private_data, private_data, private_data_len);
1169 static void cm_dup_req_handler(struct cm_work *work,
1170 struct cm_id_private *cm_id_priv)
1172 struct ib_mad_send_buf *msg = NULL;
1173 struct ib_send_wr *bad_send_wr;
1174 unsigned long flags;
1177 /* Quick state check to discard duplicate REQs. */
1178 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1181 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1185 spin_lock_irqsave(&cm_id_priv->lock, flags);
1186 switch (cm_id_priv->id.state) {
1187 case IB_CM_MRA_REQ_SENT:
1188 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1189 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1190 cm_id_priv->private_data,
1191 cm_id_priv->private_data_len);
1193 case IB_CM_TIMEWAIT:
1194 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1195 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1200 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1202 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr,
1208 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1209 free: cm_free_msg(msg);
1212 static struct cm_id_private * cm_match_req(struct cm_work *work,
1213 struct cm_id_private *cm_id_priv)
1215 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1216 struct cm_timewait_info *timewait_info;
1217 struct cm_req_msg *req_msg;
1218 unsigned long flags;
1220 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1222 /* Check for duplicate REQ and stale connections. */
1223 spin_lock_irqsave(&cm.lock, flags);
1224 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1226 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1228 if (timewait_info) {
1229 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1230 timewait_info->work.remote_id);
1231 spin_unlock_irqrestore(&cm.lock, flags);
1232 if (cur_cm_id_priv) {
1233 cm_dup_req_handler(work, cur_cm_id_priv);
1234 cm_deref_id(cur_cm_id_priv);
1236 cm_issue_rej(work->port, work->mad_recv_wc,
1237 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1242 /* Find matching listen request. */
1243 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
1244 req_msg->service_id);
1245 if (!listen_cm_id_priv) {
1246 spin_unlock_irqrestore(&cm.lock, flags);
1247 cm_issue_rej(work->port, work->mad_recv_wc,
1248 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1252 atomic_inc(&listen_cm_id_priv->refcount);
1253 atomic_inc(&cm_id_priv->refcount);
1254 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1255 atomic_inc(&cm_id_priv->work_count);
1256 spin_unlock_irqrestore(&cm.lock, flags);
1257 return listen_cm_id_priv;
1259 error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1263 static int cm_req_handler(struct cm_work *work)
1265 struct ib_cm_id *cm_id;
1266 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1267 struct cm_req_msg *req_msg;
1270 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1272 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
1274 return PTR_ERR(cm_id);
1276 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1277 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1278 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
1280 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1282 if (IS_ERR(cm_id_priv->timewait_info)) {
1283 ret = PTR_ERR(cm_id_priv->timewait_info);
1286 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1287 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1288 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1290 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1291 if (!listen_cm_id_priv) {
1296 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1297 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1298 cm_id_priv->id.service_id = req_msg->service_id;
1299 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
1301 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1302 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1305 if (req_msg->alt_local_lid) {
1306 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1310 cm_id_priv->tid = req_msg->hdr.tid;
1311 cm_id_priv->timeout_ms = cm_convert_to_ms(
1312 cm_req_get_local_resp_timeout(req_msg));
1313 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1314 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1315 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1316 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1317 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1318 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1319 cm_id_priv->local_ack_timeout =
1320 cm_req_get_primary_local_ack_timeout(req_msg);
1321 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1322 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1324 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1325 cm_process_work(cm_id_priv, work);
1326 cm_deref_id(listen_cm_id_priv);
1329 error3: atomic_dec(&cm_id_priv->refcount);
1330 cm_deref_id(listen_cm_id_priv);
1331 cm_cleanup_timewait(cm_id_priv->timewait_info);
1332 error2: kfree(cm_id_priv->timewait_info);
1333 cm_id_priv->timewait_info = NULL;
1334 error1: ib_destroy_cm_id(&cm_id_priv->id);
1338 static void cm_format_rep(struct cm_rep_msg *rep_msg,
1339 struct cm_id_private *cm_id_priv,
1340 struct ib_cm_rep_param *param)
1342 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1343 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1344 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1345 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1346 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1347 rep_msg->resp_resources = param->responder_resources;
1348 rep_msg->initiator_depth = param->initiator_depth;
1349 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1350 cm_rep_set_failover(rep_msg, param->failover_accepted);
1351 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1352 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1353 cm_rep_set_srq(rep_msg, param->srq);
1354 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1356 if (param->private_data && param->private_data_len)
1357 memcpy(rep_msg->private_data, param->private_data,
1358 param->private_data_len);
1361 int ib_send_cm_rep(struct ib_cm_id *cm_id,
1362 struct ib_cm_rep_param *param)
1364 struct cm_id_private *cm_id_priv;
1365 struct ib_mad_send_buf *msg;
1366 struct cm_rep_msg *rep_msg;
1367 struct ib_send_wr *bad_send_wr;
1368 unsigned long flags;
1371 if (param->private_data &&
1372 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1375 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1376 spin_lock_irqsave(&cm_id_priv->lock, flags);
1377 if (cm_id->state != IB_CM_REQ_RCVD &&
1378 cm_id->state != IB_CM_MRA_REQ_SENT) {
1383 ret = cm_alloc_msg(cm_id_priv, &msg);
1387 rep_msg = (struct cm_rep_msg *) msg->mad;
1388 cm_format_rep(rep_msg, cm_id_priv, param);
1389 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
1390 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1392 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1393 &msg->send_wr, &bad_send_wr);
1395 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1400 cm_id->state = IB_CM_REP_SENT;
1401 cm_id_priv->msg = msg;
1402 cm_id_priv->initiator_depth = param->initiator_depth;
1403 cm_id_priv->responder_resources = param->responder_resources;
1404 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1405 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1407 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1410 EXPORT_SYMBOL(ib_send_cm_rep);
1412 static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1413 struct cm_id_private *cm_id_priv,
1414 const void *private_data,
1415 u8 private_data_len)
1417 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1418 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1419 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1421 if (private_data && private_data_len)
1422 memcpy(rtu_msg->private_data, private_data, private_data_len);
1425 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1426 const void *private_data,
1427 u8 private_data_len)
1429 struct cm_id_private *cm_id_priv;
1430 struct ib_mad_send_buf *msg;
1431 struct ib_send_wr *bad_send_wr;
1432 unsigned long flags;
1436 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1439 data = cm_copy_private_data(private_data, private_data_len);
1441 return PTR_ERR(data);
1443 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1444 spin_lock_irqsave(&cm_id_priv->lock, flags);
1445 if (cm_id->state != IB_CM_REP_RCVD &&
1446 cm_id->state != IB_CM_MRA_REP_SENT) {
1451 ret = cm_alloc_msg(cm_id_priv, &msg);
1455 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1456 private_data, private_data_len);
1458 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1459 &msg->send_wr, &bad_send_wr);
1461 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1467 cm_id->state = IB_CM_ESTABLISHED;
1468 cm_set_private_data(cm_id_priv, data, private_data_len);
1469 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1472 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1476 EXPORT_SYMBOL(ib_send_cm_rtu);
1478 static void cm_format_rep_event(struct cm_work *work)
1480 struct cm_rep_msg *rep_msg;
1481 struct ib_cm_rep_event_param *param;
1483 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1484 param = &work->cm_event.param.rep_rcvd;
1485 param->remote_ca_guid = rep_msg->local_ca_guid;
1486 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1487 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1488 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1489 param->responder_resources = rep_msg->initiator_depth;
1490 param->initiator_depth = rep_msg->resp_resources;
1491 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1492 param->failover_accepted = cm_rep_get_failover(rep_msg);
1493 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1494 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1495 param->srq = cm_rep_get_srq(rep_msg);
1496 work->cm_event.private_data = &rep_msg->private_data;
1499 static void cm_dup_rep_handler(struct cm_work *work)
1501 struct cm_id_private *cm_id_priv;
1502 struct cm_rep_msg *rep_msg;
1503 struct ib_mad_send_buf *msg = NULL;
1504 struct ib_send_wr *bad_send_wr;
1505 unsigned long flags;
1508 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1509 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1510 rep_msg->local_comm_id);
1514 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1518 spin_lock_irqsave(&cm_id_priv->lock, flags);
1519 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1520 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1521 cm_id_priv->private_data,
1522 cm_id_priv->private_data_len);
1523 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1524 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1525 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1526 cm_id_priv->private_data,
1527 cm_id_priv->private_data_len);
1530 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1532 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr,
1538 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1539 free: cm_free_msg(msg);
1540 deref: cm_deref_id(cm_id_priv);
1543 static int cm_rep_handler(struct cm_work *work)
1545 struct cm_id_private *cm_id_priv;
1546 struct cm_rep_msg *rep_msg;
1547 unsigned long flags;
1550 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1551 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1553 cm_dup_rep_handler(work);
1557 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1558 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1559 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1561 spin_lock_irqsave(&cm.lock, flags);
1562 /* Check for duplicate REP. */
1563 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
1564 spin_unlock_irqrestore(&cm.lock, flags);
1568 /* Check for a stale connection. */
1569 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
1570 spin_unlock_irqrestore(&cm.lock, flags);
1571 cm_issue_rej(work->port, work->mad_recv_wc,
1572 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1577 spin_unlock_irqrestore(&cm.lock, flags);
1579 cm_format_rep_event(work);
1581 spin_lock_irqsave(&cm_id_priv->lock, flags);
1582 switch (cm_id_priv->id.state) {
1583 case IB_CM_REQ_SENT:
1584 case IB_CM_MRA_REQ_RCVD:
1587 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1591 cm_id_priv->id.state = IB_CM_REP_RCVD;
1592 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1593 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1594 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1595 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1596 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1597 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1599 /* todo: handle peer_to_peer */
1601 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1602 (unsigned long) cm_id_priv->msg);
1603 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1605 list_add_tail(&work->list, &cm_id_priv->work_list);
1606 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1609 cm_process_work(cm_id_priv, work);
1611 cm_deref_id(cm_id_priv);
1614 error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1615 cm_deref_id(cm_id_priv);
1619 static int cm_establish_handler(struct cm_work *work)
1621 struct cm_id_private *cm_id_priv;
1622 unsigned long flags;
1625 /* See comment in ib_cm_establish about lookup. */
1626 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1630 spin_lock_irqsave(&cm_id_priv->lock, flags);
1631 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1632 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1636 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1637 (unsigned long) cm_id_priv->msg);
1638 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1640 list_add_tail(&work->list, &cm_id_priv->work_list);
1641 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1644 cm_process_work(cm_id_priv, work);
1646 cm_deref_id(cm_id_priv);
1649 cm_deref_id(cm_id_priv);
1653 static int cm_rtu_handler(struct cm_work *work)
1655 struct cm_id_private *cm_id_priv;
1656 struct cm_rtu_msg *rtu_msg;
1657 unsigned long flags;
1660 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1661 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1662 rtu_msg->local_comm_id);
1666 work->cm_event.private_data = &rtu_msg->private_data;
1668 spin_lock_irqsave(&cm_id_priv->lock, flags);
1669 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1670 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1671 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1674 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1676 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1677 (unsigned long) cm_id_priv->msg);
1678 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1680 list_add_tail(&work->list, &cm_id_priv->work_list);
1681 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1684 cm_process_work(cm_id_priv, work);
1686 cm_deref_id(cm_id_priv);
1689 cm_deref_id(cm_id_priv);
1693 static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1694 struct cm_id_private *cm_id_priv,
1695 const void *private_data,
1696 u8 private_data_len)
1698 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1699 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1700 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1701 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1702 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1704 if (private_data && private_data_len)
1705 memcpy(dreq_msg->private_data, private_data, private_data_len);
1708 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1709 const void *private_data,
1710 u8 private_data_len)
1712 struct cm_id_private *cm_id_priv;
1713 struct ib_mad_send_buf *msg;
1714 struct ib_send_wr *bad_send_wr;
1715 unsigned long flags;
1718 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1721 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1722 spin_lock_irqsave(&cm_id_priv->lock, flags);
1723 if (cm_id->state != IB_CM_ESTABLISHED) {
1728 ret = cm_alloc_msg(cm_id_priv, &msg);
1730 cm_enter_timewait(cm_id_priv);
1734 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1735 private_data, private_data_len);
1736 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
1737 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1739 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1740 &msg->send_wr, &bad_send_wr);
1742 cm_enter_timewait(cm_id_priv);
1743 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1748 cm_id->state = IB_CM_DREQ_SENT;
1749 cm_id_priv->msg = msg;
1750 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1753 EXPORT_SYMBOL(ib_send_cm_dreq);
1755 static void cm_format_drep(struct cm_drep_msg *drep_msg,
1756 struct cm_id_private *cm_id_priv,
1757 const void *private_data,
1758 u8 private_data_len)
1760 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1761 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1762 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1764 if (private_data && private_data_len)
1765 memcpy(drep_msg->private_data, private_data, private_data_len);
1768 int ib_send_cm_drep(struct ib_cm_id *cm_id,
1769 const void *private_data,
1770 u8 private_data_len)
1772 struct cm_id_private *cm_id_priv;
1773 struct ib_mad_send_buf *msg;
1774 struct ib_send_wr *bad_send_wr;
1775 unsigned long flags;
1779 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1782 data = cm_copy_private_data(private_data, private_data_len);
1784 return PTR_ERR(data);
1786 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1787 spin_lock_irqsave(&cm_id_priv->lock, flags);
1788 if (cm_id->state != IB_CM_DREQ_RCVD) {
1789 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1794 cm_set_private_data(cm_id_priv, data, private_data_len);
1795 cm_enter_timewait(cm_id_priv);
1797 ret = cm_alloc_msg(cm_id_priv, &msg);
1801 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1802 private_data, private_data_len);
1804 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr,
1807 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1812 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1815 EXPORT_SYMBOL(ib_send_cm_drep);
1817 static int cm_dreq_handler(struct cm_work *work)
1819 struct cm_id_private *cm_id_priv;
1820 struct cm_dreq_msg *dreq_msg;
1821 struct ib_mad_send_buf *msg = NULL;
1822 struct ib_send_wr *bad_send_wr;
1823 unsigned long flags;
1826 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1827 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1828 dreq_msg->local_comm_id);
1832 work->cm_event.private_data = &dreq_msg->private_data;
1834 spin_lock_irqsave(&cm_id_priv->lock, flags);
1835 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1838 switch (cm_id_priv->id.state) {
1839 case IB_CM_REP_SENT:
1840 case IB_CM_DREQ_SENT:
1841 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1842 (unsigned long) cm_id_priv->msg);
1844 case IB_CM_ESTABLISHED:
1845 case IB_CM_MRA_REP_RCVD:
1847 case IB_CM_TIMEWAIT:
1848 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1851 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1852 cm_id_priv->private_data,
1853 cm_id_priv->private_data_len);
1854 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1856 if (ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1857 &msg->send_wr, &bad_send_wr))
1863 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1864 cm_id_priv->tid = dreq_msg->hdr.tid;
1865 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1867 list_add_tail(&work->list, &cm_id_priv->work_list);
1868 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1871 cm_process_work(cm_id_priv, work);
1873 cm_deref_id(cm_id_priv);
1876 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1877 deref: cm_deref_id(cm_id_priv);
1881 static int cm_drep_handler(struct cm_work *work)
1883 struct cm_id_private *cm_id_priv;
1884 struct cm_drep_msg *drep_msg;
1885 unsigned long flags;
1888 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
1889 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
1890 drep_msg->local_comm_id);
1894 work->cm_event.private_data = &drep_msg->private_data;
1896 spin_lock_irqsave(&cm_id_priv->lock, flags);
1897 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
1898 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
1899 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1902 cm_enter_timewait(cm_id_priv);
1904 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1905 (unsigned long) cm_id_priv->msg);
1906 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1908 list_add_tail(&work->list, &cm_id_priv->work_list);
1909 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1912 cm_process_work(cm_id_priv, work);
1914 cm_deref_id(cm_id_priv);
1917 cm_deref_id(cm_id_priv);
1921 int ib_send_cm_rej(struct ib_cm_id *cm_id,
1922 enum ib_cm_rej_reason reason,
1925 const void *private_data,
1926 u8 private_data_len)
1928 struct cm_id_private *cm_id_priv;
1929 struct ib_mad_send_buf *msg;
1930 struct ib_send_wr *bad_send_wr;
1931 unsigned long flags;
1934 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
1935 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
1938 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1940 spin_lock_irqsave(&cm_id_priv->lock, flags);
1941 switch (cm_id->state) {
1942 case IB_CM_REQ_SENT:
1943 case IB_CM_MRA_REQ_RCVD:
1944 case IB_CM_REQ_RCVD:
1945 case IB_CM_MRA_REQ_SENT:
1946 case IB_CM_REP_RCVD:
1947 case IB_CM_MRA_REP_SENT:
1948 ret = cm_alloc_msg(cm_id_priv, &msg);
1950 cm_format_rej((struct cm_rej_msg *) msg->mad,
1951 cm_id_priv, reason, ari, ari_length,
1952 private_data, private_data_len);
1954 cm_reset_to_idle(cm_id_priv);
1956 case IB_CM_REP_SENT:
1957 case IB_CM_MRA_REP_RCVD:
1958 ret = cm_alloc_msg(cm_id_priv, &msg);
1960 cm_format_rej((struct cm_rej_msg *) msg->mad,
1961 cm_id_priv, reason, ari, ari_length,
1962 private_data, private_data_len);
1964 cm_enter_timewait(cm_id_priv);
1974 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1975 &msg->send_wr, &bad_send_wr);
1979 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1982 EXPORT_SYMBOL(ib_send_cm_rej);
1984 static void cm_format_rej_event(struct cm_work *work)
1986 struct cm_rej_msg *rej_msg;
1987 struct ib_cm_rej_event_param *param;
1989 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
1990 param = &work->cm_event.param.rej_rcvd;
1991 param->ari = rej_msg->ari;
1992 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
1993 param->reason = __be16_to_cpu(rej_msg->reason);
1994 work->cm_event.private_data = &rej_msg->private_data;
1997 static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
1999 struct cm_timewait_info *timewait_info;
2000 struct cm_id_private *cm_id_priv;
2001 unsigned long flags;
2004 remote_id = rej_msg->local_comm_id;
2006 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
2007 spin_lock_irqsave(&cm.lock, flags);
2008 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
2010 if (!timewait_info) {
2011 spin_unlock_irqrestore(&cm.lock, flags);
2014 cm_id_priv = idr_find(&cm.local_id_table,
2015 (__force int) timewait_info->work.local_id);
2017 if (cm_id_priv->id.remote_id == remote_id)
2018 atomic_inc(&cm_id_priv->refcount);
2022 spin_unlock_irqrestore(&cm.lock, flags);
2023 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2024 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2026 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2031 static int cm_rej_handler(struct cm_work *work)
2033 struct cm_id_private *cm_id_priv;
2034 struct cm_rej_msg *rej_msg;
2035 unsigned long flags;
2038 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2039 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2043 cm_format_rej_event(work);
2045 spin_lock_irqsave(&cm_id_priv->lock, flags);
2046 switch (cm_id_priv->id.state) {
2047 case IB_CM_REQ_SENT:
2048 case IB_CM_MRA_REQ_RCVD:
2049 case IB_CM_REP_SENT:
2050 case IB_CM_MRA_REP_RCVD:
2051 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2052 (unsigned long) cm_id_priv->msg);
2054 case IB_CM_REQ_RCVD:
2055 case IB_CM_MRA_REQ_SENT:
2056 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
2057 cm_enter_timewait(cm_id_priv);
2059 cm_reset_to_idle(cm_id_priv);
2061 case IB_CM_DREQ_SENT:
2062 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2063 (unsigned long) cm_id_priv->msg);
2065 case IB_CM_REP_RCVD:
2066 case IB_CM_MRA_REP_SENT:
2067 case IB_CM_ESTABLISHED:
2068 cm_enter_timewait(cm_id_priv);
2071 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2076 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2078 list_add_tail(&work->list, &cm_id_priv->work_list);
2079 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2082 cm_process_work(cm_id_priv, work);
2084 cm_deref_id(cm_id_priv);
2087 cm_deref_id(cm_id_priv);
2091 int ib_send_cm_mra(struct ib_cm_id *cm_id,
2093 const void *private_data,
2094 u8 private_data_len)
2096 struct cm_id_private *cm_id_priv;
2097 struct ib_mad_send_buf *msg;
2098 struct ib_send_wr *bad_send_wr;
2100 unsigned long flags;
2103 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2106 data = cm_copy_private_data(private_data, private_data_len);
2108 return PTR_ERR(data);
2110 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2112 spin_lock_irqsave(&cm_id_priv->lock, flags);
2113 switch(cm_id_priv->id.state) {
2114 case IB_CM_REQ_RCVD:
2115 ret = cm_alloc_msg(cm_id_priv, &msg);
2119 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2120 CM_MSG_RESPONSE_REQ, service_timeout,
2121 private_data, private_data_len);
2122 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2123 &msg->send_wr, &bad_send_wr);
2126 cm_id->state = IB_CM_MRA_REQ_SENT;
2128 case IB_CM_REP_RCVD:
2129 ret = cm_alloc_msg(cm_id_priv, &msg);
2133 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2134 CM_MSG_RESPONSE_REP, service_timeout,
2135 private_data, private_data_len);
2136 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2137 &msg->send_wr, &bad_send_wr);
2140 cm_id->state = IB_CM_MRA_REP_SENT;
2142 case IB_CM_ESTABLISHED:
2143 ret = cm_alloc_msg(cm_id_priv, &msg);
2147 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2148 CM_MSG_RESPONSE_OTHER, service_timeout,
2149 private_data, private_data_len);
2150 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2151 &msg->send_wr, &bad_send_wr);
2154 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2160 cm_id_priv->service_timeout = service_timeout;
2161 cm_set_private_data(cm_id_priv, data, private_data_len);
2162 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2165 error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2169 error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2174 EXPORT_SYMBOL(ib_send_cm_mra);
2176 static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2178 switch (cm_mra_get_msg_mraed(mra_msg)) {
2179 case CM_MSG_RESPONSE_REQ:
2180 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2181 case CM_MSG_RESPONSE_REP:
2182 case CM_MSG_RESPONSE_OTHER:
2183 return cm_acquire_id(mra_msg->remote_comm_id,
2184 mra_msg->local_comm_id);
2190 static int cm_mra_handler(struct cm_work *work)
2192 struct cm_id_private *cm_id_priv;
2193 struct cm_mra_msg *mra_msg;
2194 unsigned long flags;
2197 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2198 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2202 work->cm_event.private_data = &mra_msg->private_data;
2203 work->cm_event.param.mra_rcvd.service_timeout =
2204 cm_mra_get_service_timeout(mra_msg);
2205 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2206 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2208 spin_lock_irqsave(&cm_id_priv->lock, flags);
2209 switch (cm_id_priv->id.state) {
2210 case IB_CM_REQ_SENT:
2211 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2212 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2213 (unsigned long) cm_id_priv->msg, timeout))
2215 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2217 case IB_CM_REP_SENT:
2218 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2219 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2220 (unsigned long) cm_id_priv->msg, timeout))
2222 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2224 case IB_CM_ESTABLISHED:
2225 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2226 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2227 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2228 (unsigned long) cm_id_priv->msg, timeout))
2230 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2236 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2237 cm_id_priv->id.state;
2238 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2240 list_add_tail(&work->list, &cm_id_priv->work_list);
2241 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2244 cm_process_work(cm_id_priv, work);
2246 cm_deref_id(cm_id_priv);
2249 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2250 cm_deref_id(cm_id_priv);
2254 static void cm_format_lap(struct cm_lap_msg *lap_msg,
2255 struct cm_id_private *cm_id_priv,
2256 struct ib_sa_path_rec *alternate_path,
2257 const void *private_data,
2258 u8 private_data_len)
2260 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2261 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2262 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2263 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2264 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2265 /* todo: need remote CM response timeout */
2266 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2267 lap_msg->alt_local_lid = alternate_path->slid;
2268 lap_msg->alt_remote_lid = alternate_path->dlid;
2269 lap_msg->alt_local_gid = alternate_path->sgid;
2270 lap_msg->alt_remote_gid = alternate_path->dgid;
2271 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2272 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2273 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2274 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2275 cm_lap_set_sl(lap_msg, alternate_path->sl);
2276 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2277 cm_lap_set_local_ack_timeout(lap_msg,
2278 min(31, alternate_path->packet_life_time + 1));
2280 if (private_data && private_data_len)
2281 memcpy(lap_msg->private_data, private_data, private_data_len);
2284 int ib_send_cm_lap(struct ib_cm_id *cm_id,
2285 struct ib_sa_path_rec *alternate_path,
2286 const void *private_data,
2287 u8 private_data_len)
2289 struct cm_id_private *cm_id_priv;
2290 struct ib_mad_send_buf *msg;
2291 struct ib_send_wr *bad_send_wr;
2292 unsigned long flags;
2295 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2298 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2299 spin_lock_irqsave(&cm_id_priv->lock, flags);
2300 if (cm_id->state != IB_CM_ESTABLISHED ||
2301 cm_id->lap_state != IB_CM_LAP_IDLE) {
2306 ret = cm_alloc_msg(cm_id_priv, &msg);
2310 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2311 alternate_path, private_data, private_data_len);
2312 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
2313 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2315 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2316 &msg->send_wr, &bad_send_wr);
2318 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2323 cm_id->lap_state = IB_CM_LAP_SENT;
2324 cm_id_priv->msg = msg;
2326 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2329 EXPORT_SYMBOL(ib_send_cm_lap);
2331 static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2332 struct cm_lap_msg *lap_msg)
2334 memset(path, 0, sizeof *path);
2335 path->dgid = lap_msg->alt_local_gid;
2336 path->sgid = lap_msg->alt_remote_gid;
2337 path->dlid = lap_msg->alt_local_lid;
2338 path->slid = lap_msg->alt_remote_lid;
2339 path->flow_label = cm_lap_get_flow_label(lap_msg);
2340 path->hop_limit = lap_msg->alt_hop_limit;
2341 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2342 path->reversible = 1;
2343 /* pkey is same as in REQ */
2344 path->sl = cm_lap_get_sl(lap_msg);
2345 path->mtu_selector = IB_SA_EQ;
2346 /* mtu is same as in REQ */
2347 path->rate_selector = IB_SA_EQ;
2348 path->rate = cm_lap_get_packet_rate(lap_msg);
2349 path->packet_life_time_selector = IB_SA_EQ;
2350 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2351 path->packet_life_time -= (path->packet_life_time > 0);
2354 static int cm_lap_handler(struct cm_work *work)
2356 struct cm_id_private *cm_id_priv;
2357 struct cm_lap_msg *lap_msg;
2358 struct ib_cm_lap_event_param *param;
2359 struct ib_mad_send_buf *msg = NULL;
2360 struct ib_send_wr *bad_send_wr;
2361 unsigned long flags;
2364 /* todo: verify LAP request and send reject APR if invalid. */
2365 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2366 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2367 lap_msg->local_comm_id);
2371 param = &work->cm_event.param.lap_rcvd;
2372 param->alternate_path = &work->path[0];
2373 cm_format_path_from_lap(param->alternate_path, lap_msg);
2374 work->cm_event.private_data = &lap_msg->private_data;
2376 spin_lock_irqsave(&cm_id_priv->lock, flags);
2377 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2380 switch (cm_id_priv->id.lap_state) {
2381 case IB_CM_LAP_IDLE:
2383 case IB_CM_MRA_LAP_SENT:
2384 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2387 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2388 CM_MSG_RESPONSE_OTHER,
2389 cm_id_priv->service_timeout,
2390 cm_id_priv->private_data,
2391 cm_id_priv->private_data_len);
2392 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2394 if (ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2395 &msg->send_wr, &bad_send_wr))
2402 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2403 cm_id_priv->tid = lap_msg->hdr.tid;
2404 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2406 list_add_tail(&work->list, &cm_id_priv->work_list);
2407 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2410 cm_process_work(cm_id_priv, work);
2412 cm_deref_id(cm_id_priv);
2415 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2416 deref: cm_deref_id(cm_id_priv);
2420 static void cm_format_apr(struct cm_apr_msg *apr_msg,
2421 struct cm_id_private *cm_id_priv,
2422 enum ib_cm_apr_status status,
2425 const void *private_data,
2426 u8 private_data_len)
2428 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2429 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2430 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2431 apr_msg->ap_status = (u8) status;
2433 if (info && info_length) {
2434 apr_msg->info_length = info_length;
2435 memcpy(apr_msg->info, info, info_length);
2438 if (private_data && private_data_len)
2439 memcpy(apr_msg->private_data, private_data, private_data_len);
2442 int ib_send_cm_apr(struct ib_cm_id *cm_id,
2443 enum ib_cm_apr_status status,
2446 const void *private_data,
2447 u8 private_data_len)
2449 struct cm_id_private *cm_id_priv;
2450 struct ib_mad_send_buf *msg;
2451 struct ib_send_wr *bad_send_wr;
2452 unsigned long flags;
2455 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2456 (info && info_length > IB_CM_APR_INFO_LENGTH))
2459 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2460 spin_lock_irqsave(&cm_id_priv->lock, flags);
2461 if (cm_id->state != IB_CM_ESTABLISHED ||
2462 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2463 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2468 ret = cm_alloc_msg(cm_id_priv, &msg);
2472 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2473 info, info_length, private_data, private_data_len);
2474 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2475 &msg->send_wr, &bad_send_wr);
2477 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2482 cm_id->lap_state = IB_CM_LAP_IDLE;
2483 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2486 EXPORT_SYMBOL(ib_send_cm_apr);
2488 static int cm_apr_handler(struct cm_work *work)
2490 struct cm_id_private *cm_id_priv;
2491 struct cm_apr_msg *apr_msg;
2492 unsigned long flags;
2495 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2496 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2497 apr_msg->local_comm_id);
2499 return -EINVAL; /* Unmatched reply. */
2501 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2502 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2503 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2504 work->cm_event.private_data = &apr_msg->private_data;
2506 spin_lock_irqsave(&cm_id_priv->lock, flags);
2507 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2508 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2509 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2510 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2513 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
2514 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2515 (unsigned long) cm_id_priv->msg);
2516 cm_id_priv->msg = NULL;
2518 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2520 list_add_tail(&work->list, &cm_id_priv->work_list);
2521 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2524 cm_process_work(cm_id_priv, work);
2526 cm_deref_id(cm_id_priv);
2529 cm_deref_id(cm_id_priv);
2533 static int cm_timewait_handler(struct cm_work *work)
2535 struct cm_timewait_info *timewait_info;
2536 struct cm_id_private *cm_id_priv;
2537 unsigned long flags;
2540 timewait_info = (struct cm_timewait_info *)work;
2541 cm_cleanup_timewait(timewait_info);
2543 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2544 timewait_info->work.remote_id);
2548 spin_lock_irqsave(&cm_id_priv->lock, flags);
2549 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2550 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2551 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2554 cm_id_priv->id.state = IB_CM_IDLE;
2555 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2557 list_add_tail(&work->list, &cm_id_priv->work_list);
2558 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2561 cm_process_work(cm_id_priv, work);
2563 cm_deref_id(cm_id_priv);
2566 cm_deref_id(cm_id_priv);
2570 static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2571 struct cm_id_private *cm_id_priv,
2572 struct ib_cm_sidr_req_param *param)
2574 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2575 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2576 sidr_req_msg->request_id = cm_id_priv->id.local_id;
2577 sidr_req_msg->pkey = cpu_to_be16(param->pkey);
2578 sidr_req_msg->service_id = param->service_id;
2580 if (param->private_data && param->private_data_len)
2581 memcpy(sidr_req_msg->private_data, param->private_data,
2582 param->private_data_len);
2585 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2586 struct ib_cm_sidr_req_param *param)
2588 struct cm_id_private *cm_id_priv;
2589 struct ib_mad_send_buf *msg;
2590 struct ib_send_wr *bad_send_wr;
2591 unsigned long flags;
2594 if (!param->path || (param->private_data &&
2595 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2598 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2599 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2603 cm_id->service_id = param->service_id;
2604 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
2605 cm_id_priv->timeout_ms = param->timeout_ms;
2606 cm_id_priv->max_cm_retries = param->max_cm_retries;
2607 ret = cm_alloc_msg(cm_id_priv, &msg);
2611 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2613 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
2614 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2616 spin_lock_irqsave(&cm_id_priv->lock, flags);
2617 if (cm_id->state == IB_CM_IDLE)
2618 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2619 &msg->send_wr, &bad_send_wr);
2624 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2628 cm_id->state = IB_CM_SIDR_REQ_SENT;
2629 cm_id_priv->msg = msg;
2630 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2634 EXPORT_SYMBOL(ib_send_cm_sidr_req);
2636 static void cm_format_sidr_req_event(struct cm_work *work,
2637 struct ib_cm_id *listen_id)
2639 struct cm_sidr_req_msg *sidr_req_msg;
2640 struct ib_cm_sidr_req_event_param *param;
2642 sidr_req_msg = (struct cm_sidr_req_msg *)
2643 work->mad_recv_wc->recv_buf.mad;
2644 param = &work->cm_event.param.sidr_req_rcvd;
2645 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
2646 param->listen_id = listen_id;
2647 param->port = work->port->port_num;
2648 work->cm_event.private_data = &sidr_req_msg->private_data;
2651 static int cm_sidr_req_handler(struct cm_work *work)
2653 struct ib_cm_id *cm_id;
2654 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2655 struct cm_sidr_req_msg *sidr_req_msg;
2657 unsigned long flags;
2659 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
2661 return PTR_ERR(cm_id);
2662 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2664 /* Record SGID/SLID and request ID for lookup. */
2665 sidr_req_msg = (struct cm_sidr_req_msg *)
2666 work->mad_recv_wc->recv_buf.mad;
2667 wc = work->mad_recv_wc->wc;
2668 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
2669 cm_id_priv->av.dgid.global.interface_id = 0;
2670 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2672 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2673 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2674 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2675 atomic_inc(&cm_id_priv->work_count);
2677 spin_lock_irqsave(&cm.lock, flags);
2678 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2679 if (cur_cm_id_priv) {
2680 spin_unlock_irqrestore(&cm.lock, flags);
2681 goto out; /* Duplicate message. */
2683 cur_cm_id_priv = cm_find_listen(cm_id->device,
2684 sidr_req_msg->service_id);
2685 if (!cur_cm_id_priv) {
2686 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2687 spin_unlock_irqrestore(&cm.lock, flags);
2688 /* todo: reply with no match */
2689 goto out; /* No match. */
2691 atomic_inc(&cur_cm_id_priv->refcount);
2692 spin_unlock_irqrestore(&cm.lock, flags);
2694 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2695 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2696 cm_id_priv->id.service_id = sidr_req_msg->service_id;
2697 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
2699 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2700 cm_process_work(cm_id_priv, work);
2701 cm_deref_id(cur_cm_id_priv);
2704 ib_destroy_cm_id(&cm_id_priv->id);
2708 static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2709 struct cm_id_private *cm_id_priv,
2710 struct ib_cm_sidr_rep_param *param)
2712 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2714 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2715 sidr_rep_msg->status = param->status;
2716 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2717 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2718 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2720 if (param->info && param->info_length)
2721 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2723 if (param->private_data && param->private_data_len)
2724 memcpy(sidr_rep_msg->private_data, param->private_data,
2725 param->private_data_len);
2728 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2729 struct ib_cm_sidr_rep_param *param)
2731 struct cm_id_private *cm_id_priv;
2732 struct ib_mad_send_buf *msg;
2733 struct ib_send_wr *bad_send_wr;
2734 unsigned long flags;
2737 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2738 (param->private_data &&
2739 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2742 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2743 spin_lock_irqsave(&cm_id_priv->lock, flags);
2744 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2749 ret = cm_alloc_msg(cm_id_priv, &msg);
2753 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2755 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2756 &msg->send_wr, &bad_send_wr);
2758 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2762 cm_id->state = IB_CM_IDLE;
2763 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2765 spin_lock_irqsave(&cm.lock, flags);
2766 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2767 spin_unlock_irqrestore(&cm.lock, flags);
2770 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2773 EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2775 static void cm_format_sidr_rep_event(struct cm_work *work)
2777 struct cm_sidr_rep_msg *sidr_rep_msg;
2778 struct ib_cm_sidr_rep_event_param *param;
2780 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2781 work->mad_recv_wc->recv_buf.mad;
2782 param = &work->cm_event.param.sidr_rep_rcvd;
2783 param->status = sidr_rep_msg->status;
2784 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2785 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2786 param->info = &sidr_rep_msg->info;
2787 param->info_len = sidr_rep_msg->info_length;
2788 work->cm_event.private_data = &sidr_rep_msg->private_data;
2791 static int cm_sidr_rep_handler(struct cm_work *work)
2793 struct cm_sidr_rep_msg *sidr_rep_msg;
2794 struct cm_id_private *cm_id_priv;
2795 unsigned long flags;
2797 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2798 work->mad_recv_wc->recv_buf.mad;
2799 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2801 return -EINVAL; /* Unmatched reply. */
2803 spin_lock_irqsave(&cm_id_priv->lock, flags);
2804 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2805 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2808 cm_id_priv->id.state = IB_CM_IDLE;
2809 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2810 (unsigned long) cm_id_priv->msg);
2811 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2813 cm_format_sidr_rep_event(work);
2814 cm_process_work(cm_id_priv, work);
2817 cm_deref_id(cm_id_priv);
2821 static void cm_process_send_error(struct ib_mad_send_buf *msg,
2822 enum ib_wc_status wc_status)
2824 struct cm_id_private *cm_id_priv;
2825 struct ib_cm_event cm_event;
2826 enum ib_cm_state state;
2827 unsigned long flags;
2830 memset(&cm_event, 0, sizeof cm_event);
2831 cm_id_priv = msg->context[0];
2833 /* Discard old sends or ones without a response. */
2834 spin_lock_irqsave(&cm_id_priv->lock, flags);
2835 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2836 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2840 case IB_CM_REQ_SENT:
2841 case IB_CM_MRA_REQ_RCVD:
2842 cm_reset_to_idle(cm_id_priv);
2843 cm_event.event = IB_CM_REQ_ERROR;
2845 case IB_CM_REP_SENT:
2846 case IB_CM_MRA_REP_RCVD:
2847 cm_reset_to_idle(cm_id_priv);
2848 cm_event.event = IB_CM_REP_ERROR;
2850 case IB_CM_DREQ_SENT:
2851 cm_enter_timewait(cm_id_priv);
2852 cm_event.event = IB_CM_DREQ_ERROR;
2854 case IB_CM_SIDR_REQ_SENT:
2855 cm_id_priv->id.state = IB_CM_IDLE;
2856 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2861 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2862 cm_event.param.send_status = wc_status;
2864 /* No other events can occur on the cm_id at this point. */
2865 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2868 ib_destroy_cm_id(&cm_id_priv->id);
2871 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2875 static void cm_send_handler(struct ib_mad_agent *mad_agent,
2876 struct ib_mad_send_wc *mad_send_wc)
2878 struct ib_mad_send_buf *msg;
2880 msg = (struct ib_mad_send_buf *)(unsigned long)mad_send_wc->wr_id;
2882 switch (mad_send_wc->status) {
2884 case IB_WC_WR_FLUSH_ERR:
2888 if (msg->context[0] && msg->context[1])
2889 cm_process_send_error(msg, mad_send_wc->status);
2896 static void cm_work_handler(void *data)
2898 struct cm_work *work = data;
2901 switch (work->cm_event.event) {
2902 case IB_CM_REQ_RECEIVED:
2903 ret = cm_req_handler(work);
2905 case IB_CM_MRA_RECEIVED:
2906 ret = cm_mra_handler(work);
2908 case IB_CM_REJ_RECEIVED:
2909 ret = cm_rej_handler(work);
2911 case IB_CM_REP_RECEIVED:
2912 ret = cm_rep_handler(work);
2914 case IB_CM_RTU_RECEIVED:
2915 ret = cm_rtu_handler(work);
2917 case IB_CM_USER_ESTABLISHED:
2918 ret = cm_establish_handler(work);
2920 case IB_CM_DREQ_RECEIVED:
2921 ret = cm_dreq_handler(work);
2923 case IB_CM_DREP_RECEIVED:
2924 ret = cm_drep_handler(work);
2926 case IB_CM_SIDR_REQ_RECEIVED:
2927 ret = cm_sidr_req_handler(work);
2929 case IB_CM_SIDR_REP_RECEIVED:
2930 ret = cm_sidr_rep_handler(work);
2932 case IB_CM_LAP_RECEIVED:
2933 ret = cm_lap_handler(work);
2935 case IB_CM_APR_RECEIVED:
2936 ret = cm_apr_handler(work);
2938 case IB_CM_TIMEWAIT_EXIT:
2939 ret = cm_timewait_handler(work);
2949 int ib_cm_establish(struct ib_cm_id *cm_id)
2951 struct cm_id_private *cm_id_priv;
2952 struct cm_work *work;
2953 unsigned long flags;
2956 work = kmalloc(sizeof *work, GFP_ATOMIC);
2960 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2961 spin_lock_irqsave(&cm_id_priv->lock, flags);
2962 switch (cm_id->state)
2964 case IB_CM_REP_SENT:
2965 case IB_CM_MRA_REP_RCVD:
2966 cm_id->state = IB_CM_ESTABLISHED;
2968 case IB_CM_ESTABLISHED:
2975 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2983 * The CM worker thread may try to destroy the cm_id before it
2984 * can execute this work item. To prevent potential deadlock,
2985 * we need to find the cm_id once we're in the context of the
2986 * worker thread, rather than holding a reference on it.
2988 INIT_WORK(&work->work, cm_work_handler, work);
2989 work->local_id = cm_id->local_id;
2990 work->remote_id = cm_id->remote_id;
2991 work->mad_recv_wc = NULL;
2992 work->cm_event.event = IB_CM_USER_ESTABLISHED;
2993 queue_work(cm.wq, &work->work);
2997 EXPORT_SYMBOL(ib_cm_establish);
2999 static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3000 struct ib_mad_recv_wc *mad_recv_wc)
3002 struct cm_work *work;
3003 enum ib_cm_event_type event;
3006 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3007 case CM_REQ_ATTR_ID:
3008 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3009 alt_local_lid != 0);
3010 event = IB_CM_REQ_RECEIVED;
3012 case CM_MRA_ATTR_ID:
3013 event = IB_CM_MRA_RECEIVED;
3015 case CM_REJ_ATTR_ID:
3016 event = IB_CM_REJ_RECEIVED;
3018 case CM_REP_ATTR_ID:
3019 event = IB_CM_REP_RECEIVED;
3021 case CM_RTU_ATTR_ID:
3022 event = IB_CM_RTU_RECEIVED;
3024 case CM_DREQ_ATTR_ID:
3025 event = IB_CM_DREQ_RECEIVED;
3027 case CM_DREP_ATTR_ID:
3028 event = IB_CM_DREP_RECEIVED;
3030 case CM_SIDR_REQ_ATTR_ID:
3031 event = IB_CM_SIDR_REQ_RECEIVED;
3033 case CM_SIDR_REP_ATTR_ID:
3034 event = IB_CM_SIDR_REP_RECEIVED;
3036 case CM_LAP_ATTR_ID:
3038 event = IB_CM_LAP_RECEIVED;
3040 case CM_APR_ATTR_ID:
3041 event = IB_CM_APR_RECEIVED;
3044 ib_free_recv_mad(mad_recv_wc);
3048 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3051 ib_free_recv_mad(mad_recv_wc);
3055 INIT_WORK(&work->work, cm_work_handler, work);
3056 work->cm_event.event = event;
3057 work->mad_recv_wc = mad_recv_wc;
3058 work->port = (struct cm_port *)mad_agent->context;
3059 queue_work(cm.wq, &work->work);
3062 static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3063 struct ib_qp_attr *qp_attr,
3066 unsigned long flags;
3069 spin_lock_irqsave(&cm_id_priv->lock, flags);
3070 switch (cm_id_priv->id.state) {
3071 case IB_CM_REQ_SENT:
3072 case IB_CM_MRA_REQ_RCVD:
3073 case IB_CM_REQ_RCVD:
3074 case IB_CM_MRA_REQ_SENT:
3075 case IB_CM_REP_RCVD:
3076 case IB_CM_MRA_REP_SENT:
3077 case IB_CM_REP_SENT:
3078 case IB_CM_MRA_REP_RCVD:
3079 case IB_CM_ESTABLISHED:
3080 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3081 IB_QP_PKEY_INDEX | IB_QP_PORT;
3082 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE;
3083 if (cm_id_priv->responder_resources)
3084 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_WRITE |
3085 IB_ACCESS_REMOTE_READ;
3086 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3087 qp_attr->port_num = cm_id_priv->av.port->port_num;
3094 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3098 static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3099 struct ib_qp_attr *qp_attr,
3102 unsigned long flags;
3105 spin_lock_irqsave(&cm_id_priv->lock, flags);
3106 switch (cm_id_priv->id.state) {
3107 case IB_CM_REQ_RCVD:
3108 case IB_CM_MRA_REQ_SENT:
3109 case IB_CM_REP_RCVD:
3110 case IB_CM_MRA_REP_SENT:
3111 case IB_CM_REP_SENT:
3112 case IB_CM_MRA_REP_RCVD:
3113 case IB_CM_ESTABLISHED:
3114 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
3115 IB_QP_DEST_QPN | IB_QP_RQ_PSN |
3116 IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER;
3117 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3118 qp_attr->path_mtu = cm_id_priv->path_mtu;
3119 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3120 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
3121 qp_attr->max_dest_rd_atomic = cm_id_priv->responder_resources;
3122 qp_attr->min_rnr_timer = 0;
3123 if (cm_id_priv->alt_av.ah_attr.dlid) {
3124 *qp_attr_mask |= IB_QP_ALT_PATH;
3125 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3133 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3137 static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3138 struct ib_qp_attr *qp_attr,
3141 unsigned long flags;
3144 spin_lock_irqsave(&cm_id_priv->lock, flags);
3145 switch (cm_id_priv->id.state) {
3146 case IB_CM_REP_RCVD:
3147 case IB_CM_MRA_REP_SENT:
3148 case IB_CM_REP_SENT:
3149 case IB_CM_MRA_REP_RCVD:
3150 case IB_CM_ESTABLISHED:
3151 *qp_attr_mask = IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3152 IB_QP_RNR_RETRY | IB_QP_SQ_PSN |
3153 IB_QP_MAX_QP_RD_ATOMIC;
3154 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3155 qp_attr->retry_cnt = cm_id_priv->retry_count;
3156 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3157 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
3158 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3159 if (cm_id_priv->alt_av.ah_attr.dlid) {
3160 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3161 qp_attr->path_mig_state = IB_MIG_REARM;
3169 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3173 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3174 struct ib_qp_attr *qp_attr,
3177 struct cm_id_private *cm_id_priv;
3180 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3181 switch (qp_attr->qp_state) {
3183 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3186 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3189 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3197 EXPORT_SYMBOL(ib_cm_init_qp_attr);
3199 static __be64 cm_get_ca_guid(struct ib_device *device)
3201 struct ib_device_attr *device_attr;
3205 device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
3209 ret = ib_query_device(device, device_attr);
3210 guid = ret ? 0 : device_attr->node_guid;
3215 static void cm_add_one(struct ib_device *device)
3217 struct cm_device *cm_dev;
3218 struct cm_port *port;
3219 struct ib_mad_reg_req reg_req = {
3220 .mgmt_class = IB_MGMT_CLASS_CM,
3221 .mgmt_class_version = IB_CM_CLASS_VERSION
3223 struct ib_port_modify port_modify = {
3224 .set_port_cap_mask = IB_PORT_CM_SUP
3226 unsigned long flags;
3230 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3231 device->phys_port_cnt, GFP_KERNEL);
3235 cm_dev->device = device;
3236 cm_dev->ca_guid = cm_get_ca_guid(device);
3237 if (!cm_dev->ca_guid)
3240 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3241 for (i = 1; i <= device->phys_port_cnt; i++) {
3242 port = &cm_dev->port[i-1];
3243 port->cm_dev = cm_dev;
3245 port->mad_agent = ib_register_mad_agent(device, i,
3252 if (IS_ERR(port->mad_agent))
3255 ret = ib_modify_port(device, i, 0, &port_modify);
3259 ib_set_client_data(device, &cm_client, cm_dev);
3261 write_lock_irqsave(&cm.device_lock, flags);
3262 list_add_tail(&cm_dev->list, &cm.device_list);
3263 write_unlock_irqrestore(&cm.device_lock, flags);
3267 ib_unregister_mad_agent(port->mad_agent);
3269 port_modify.set_port_cap_mask = 0;
3270 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3272 port = &cm_dev->port[i-1];
3273 ib_modify_port(device, port->port_num, 0, &port_modify);
3274 ib_unregister_mad_agent(port->mad_agent);
3280 static void cm_remove_one(struct ib_device *device)
3282 struct cm_device *cm_dev;
3283 struct cm_port *port;
3284 struct ib_port_modify port_modify = {
3285 .clr_port_cap_mask = IB_PORT_CM_SUP
3287 unsigned long flags;
3290 cm_dev = ib_get_client_data(device, &cm_client);
3294 write_lock_irqsave(&cm.device_lock, flags);
3295 list_del(&cm_dev->list);
3296 write_unlock_irqrestore(&cm.device_lock, flags);
3298 for (i = 1; i <= device->phys_port_cnt; i++) {
3299 port = &cm_dev->port[i-1];
3300 ib_modify_port(device, port->port_num, 0, &port_modify);
3301 ib_unregister_mad_agent(port->mad_agent);
3306 static int __init ib_cm_init(void)
3310 memset(&cm, 0, sizeof cm);
3311 INIT_LIST_HEAD(&cm.device_list);
3312 rwlock_init(&cm.device_lock);
3313 spin_lock_init(&cm.lock);
3314 cm.listen_service_table = RB_ROOT;
3315 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3316 cm.remote_id_table = RB_ROOT;
3317 cm.remote_qp_table = RB_ROOT;
3318 cm.remote_sidr_table = RB_ROOT;
3319 idr_init(&cm.local_id_table);
3320 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3322 cm.wq = create_workqueue("ib_cm");
3326 ret = ib_register_client(&cm_client);
3332 destroy_workqueue(cm.wq);
3336 static void __exit ib_cm_cleanup(void)
3338 flush_workqueue(cm.wq);
3339 destroy_workqueue(cm.wq);
3340 ib_unregister_client(&cm_client);
3343 module_init(ib_cm_init);
3344 module_exit(ib_cm_cleanup);