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>
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 u32 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;
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, 1, cm_id_priv->av.pkey_index,
177 ah, 0, sizeof(struct ib_mad_hdr),
178 sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr),
185 /* Timeout set by caller if response is expected. */
186 m->send_wr.wr.ud.retries = cm_id_priv->max_cm_retries;
188 atomic_inc(&cm_id_priv->refcount);
189 m->context[0] = cm_id_priv;
194 static int cm_alloc_response_msg(struct cm_port *port,
195 struct ib_mad_recv_wc *mad_recv_wc,
196 struct ib_mad_send_buf **msg)
198 struct ib_mad_send_buf *m;
201 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
202 mad_recv_wc->recv_buf.grh, port->port_num);
206 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
207 ah, 0, sizeof(struct ib_mad_hdr),
208 sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr),
218 static void cm_free_msg(struct ib_mad_send_buf *msg)
220 ib_destroy_ah(msg->send_wr.wr.ud.ah);
222 cm_deref_id(msg->context[0]);
223 ib_free_send_mad(msg);
226 static void * cm_copy_private_data(const void *private_data,
231 if (!private_data || !private_data_len)
234 data = kmalloc(private_data_len, GFP_KERNEL);
236 return ERR_PTR(-ENOMEM);
238 memcpy(data, private_data, private_data_len);
242 static void cm_set_private_data(struct cm_id_private *cm_id_priv,
243 void *private_data, u8 private_data_len)
245 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
246 kfree(cm_id_priv->private_data);
248 cm_id_priv->private_data = private_data;
249 cm_id_priv->private_data_len = private_data_len;
252 static void cm_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num,
253 u16 dlid, u8 sl, u16 src_path_bits)
255 memset(ah_attr, 0, sizeof ah_attr);
256 ah_attr->dlid = be16_to_cpu(dlid);
258 ah_attr->src_path_bits = src_path_bits;
259 ah_attr->port_num = port_num;
262 static void cm_init_av_for_response(struct cm_port *port,
263 struct ib_wc *wc, struct cm_av *av)
266 av->pkey_index = wc->pkey_index;
267 cm_set_ah_attr(&av->ah_attr, port->port_num, cpu_to_be16(wc->slid),
268 wc->sl, wc->dlid_path_bits);
271 static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
273 struct cm_device *cm_dev;
274 struct cm_port *port = NULL;
279 read_lock_irqsave(&cm.device_lock, flags);
280 list_for_each_entry(cm_dev, &cm.device_list, list) {
281 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
283 port = &cm_dev->port[p-1];
287 read_unlock_irqrestore(&cm.device_lock, flags);
292 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
293 be16_to_cpu(path->pkey), &av->pkey_index);
298 cm_set_ah_attr(&av->ah_attr, av->port->port_num, path->dlid,
299 path->sl, path->slid & 0x7F);
300 av->packet_life_time = path->packet_life_time;
304 static int cm_alloc_id(struct cm_id_private *cm_id_priv)
310 spin_lock_irqsave(&cm.lock, flags);
311 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 1,
312 (int *) &cm_id_priv->id.local_id);
313 spin_unlock_irqrestore(&cm.lock, flags);
314 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
318 static void cm_free_id(u32 local_id)
322 spin_lock_irqsave(&cm.lock, flags);
323 idr_remove(&cm.local_id_table, (int) local_id);
324 spin_unlock_irqrestore(&cm.lock, flags);
327 static struct cm_id_private * cm_get_id(u32 local_id, u32 remote_id)
329 struct cm_id_private *cm_id_priv;
331 cm_id_priv = idr_find(&cm.local_id_table, (int) local_id);
333 if (cm_id_priv->id.remote_id == remote_id)
334 atomic_inc(&cm_id_priv->refcount);
342 static struct cm_id_private * cm_acquire_id(u32 local_id, u32 remote_id)
344 struct cm_id_private *cm_id_priv;
347 spin_lock_irqsave(&cm.lock, flags);
348 cm_id_priv = cm_get_id(local_id, remote_id);
349 spin_unlock_irqrestore(&cm.lock, flags);
354 static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
356 struct rb_node **link = &cm.listen_service_table.rb_node;
357 struct rb_node *parent = NULL;
358 struct cm_id_private *cur_cm_id_priv;
359 u64 service_id = cm_id_priv->id.service_id;
360 u64 service_mask = cm_id_priv->id.service_mask;
364 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
366 if ((cur_cm_id_priv->id.service_mask & service_id) ==
367 (service_mask & cur_cm_id_priv->id.service_id))
369 if (service_id < cur_cm_id_priv->id.service_id)
370 link = &(*link)->rb_left;
372 link = &(*link)->rb_right;
374 rb_link_node(&cm_id_priv->service_node, parent, link);
375 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
379 static struct cm_id_private * cm_find_listen(u64 service_id)
381 struct rb_node *node = cm.listen_service_table.rb_node;
382 struct cm_id_private *cm_id_priv;
385 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
386 if ((cm_id_priv->id.service_mask & service_id) ==
387 (cm_id_priv->id.service_mask & cm_id_priv->id.service_id))
389 if (service_id < cm_id_priv->id.service_id)
390 node = node->rb_left;
392 node = node->rb_right;
397 static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
400 struct rb_node **link = &cm.remote_id_table.rb_node;
401 struct rb_node *parent = NULL;
402 struct cm_timewait_info *cur_timewait_info;
403 u64 remote_ca_guid = timewait_info->remote_ca_guid;
404 u32 remote_id = timewait_info->work.remote_id;
408 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
410 if (remote_id < cur_timewait_info->work.remote_id)
411 link = &(*link)->rb_left;
412 else if (remote_id > cur_timewait_info->work.remote_id)
413 link = &(*link)->rb_right;
414 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
415 link = &(*link)->rb_left;
416 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
417 link = &(*link)->rb_right;
419 return cur_timewait_info;
421 timewait_info->inserted_remote_id = 1;
422 rb_link_node(&timewait_info->remote_id_node, parent, link);
423 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
427 static struct cm_timewait_info * cm_find_remote_id(u64 remote_ca_guid,
430 struct rb_node *node = cm.remote_id_table.rb_node;
431 struct cm_timewait_info *timewait_info;
434 timewait_info = rb_entry(node, struct cm_timewait_info,
436 if (remote_id < timewait_info->work.remote_id)
437 node = node->rb_left;
438 else if (remote_id > timewait_info->work.remote_id)
439 node = node->rb_right;
440 else if (remote_ca_guid < timewait_info->remote_ca_guid)
441 node = node->rb_left;
442 else if (remote_ca_guid > timewait_info->remote_ca_guid)
443 node = node->rb_right;
445 return timewait_info;
450 static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
453 struct rb_node **link = &cm.remote_qp_table.rb_node;
454 struct rb_node *parent = NULL;
455 struct cm_timewait_info *cur_timewait_info;
456 u64 remote_ca_guid = timewait_info->remote_ca_guid;
457 u32 remote_qpn = timewait_info->remote_qpn;
461 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
463 if (remote_qpn < cur_timewait_info->remote_qpn)
464 link = &(*link)->rb_left;
465 else if (remote_qpn > cur_timewait_info->remote_qpn)
466 link = &(*link)->rb_right;
467 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
468 link = &(*link)->rb_left;
469 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
470 link = &(*link)->rb_right;
472 return cur_timewait_info;
474 timewait_info->inserted_remote_qp = 1;
475 rb_link_node(&timewait_info->remote_qp_node, parent, link);
476 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
480 static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
483 struct rb_node **link = &cm.remote_sidr_table.rb_node;
484 struct rb_node *parent = NULL;
485 struct cm_id_private *cur_cm_id_priv;
486 union ib_gid *port_gid = &cm_id_priv->av.dgid;
487 u32 remote_id = cm_id_priv->id.remote_id;
491 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
493 if (remote_id < cur_cm_id_priv->id.remote_id)
494 link = &(*link)->rb_left;
495 else if (remote_id > cur_cm_id_priv->id.remote_id)
496 link = &(*link)->rb_right;
499 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
502 link = &(*link)->rb_left;
504 link = &(*link)->rb_right;
506 return cur_cm_id_priv;
509 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
510 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
514 static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
515 enum ib_cm_sidr_status status)
517 struct ib_cm_sidr_rep_param param;
519 memset(¶m, 0, sizeof param);
520 param.status = status;
521 ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m);
524 struct ib_cm_id *ib_create_cm_id(ib_cm_handler cm_handler,
527 struct cm_id_private *cm_id_priv;
530 cm_id_priv = kmalloc(sizeof *cm_id_priv, GFP_KERNEL);
532 return ERR_PTR(-ENOMEM);
534 memset(cm_id_priv, 0, sizeof *cm_id_priv);
535 cm_id_priv->id.state = IB_CM_IDLE;
536 cm_id_priv->id.cm_handler = cm_handler;
537 cm_id_priv->id.context = context;
538 ret = cm_alloc_id(cm_id_priv);
542 spin_lock_init(&cm_id_priv->lock);
543 init_waitqueue_head(&cm_id_priv->wait);
544 INIT_LIST_HEAD(&cm_id_priv->work_list);
545 atomic_set(&cm_id_priv->work_count, -1);
546 atomic_set(&cm_id_priv->refcount, 1);
547 return &cm_id_priv->id;
551 return ERR_PTR(-ENOMEM);
553 EXPORT_SYMBOL(ib_create_cm_id);
555 static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
557 struct cm_work *work;
559 if (list_empty(&cm_id_priv->work_list))
562 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
563 list_del(&work->list);
567 static void cm_free_work(struct cm_work *work)
569 if (work->mad_recv_wc)
570 ib_free_recv_mad(work->mad_recv_wc);
574 static inline int cm_convert_to_ms(int iba_time)
576 /* approximate conversion to ms from 4.096us x 2^iba_time */
577 return 1 << max(iba_time - 8, 0);
580 static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
584 if (!timewait_info->inserted_remote_id &&
585 !timewait_info->inserted_remote_qp)
588 spin_lock_irqsave(&cm.lock, flags);
589 if (timewait_info->inserted_remote_id) {
590 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
591 timewait_info->inserted_remote_id = 0;
594 if (timewait_info->inserted_remote_qp) {
595 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
596 timewait_info->inserted_remote_qp = 0;
598 spin_unlock_irqrestore(&cm.lock, flags);
601 static struct cm_timewait_info * cm_create_timewait_info(u32 local_id)
603 struct cm_timewait_info *timewait_info;
605 timewait_info = kmalloc(sizeof *timewait_info, GFP_KERNEL);
607 return ERR_PTR(-ENOMEM);
608 memset(timewait_info, 0, sizeof *timewait_info);
610 timewait_info->work.local_id = local_id;
611 INIT_WORK(&timewait_info->work.work, cm_work_handler,
612 &timewait_info->work);
613 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
614 return timewait_info;
617 static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
622 * The cm_id could be destroyed by the user before we exit timewait.
623 * To protect against this, we search for the cm_id after exiting
624 * timewait before notifying the user that we've exited timewait.
626 cm_id_priv->id.state = IB_CM_TIMEWAIT;
627 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
628 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
629 msecs_to_jiffies(wait_time));
630 cm_id_priv->timewait_info = NULL;
633 static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
635 cm_id_priv->id.state = IB_CM_IDLE;
636 if (cm_id_priv->timewait_info) {
637 cm_cleanup_timewait(cm_id_priv->timewait_info);
638 kfree(cm_id_priv->timewait_info);
639 cm_id_priv->timewait_info = NULL;
643 void ib_destroy_cm_id(struct ib_cm_id *cm_id)
645 struct cm_id_private *cm_id_priv;
646 struct cm_work *work;
649 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
651 spin_lock_irqsave(&cm_id_priv->lock, flags);
652 switch (cm_id->state) {
654 cm_id->state = IB_CM_IDLE;
655 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
656 spin_lock_irqsave(&cm.lock, flags);
657 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
658 spin_unlock_irqrestore(&cm.lock, flags);
660 case IB_CM_SIDR_REQ_SENT:
661 cm_id->state = IB_CM_IDLE;
662 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
663 (unsigned long) cm_id_priv->msg);
664 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
666 case IB_CM_SIDR_REQ_RCVD:
667 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
668 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
671 case IB_CM_MRA_REQ_RCVD:
673 case IB_CM_MRA_REP_RCVD:
674 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
675 (unsigned long) cm_id_priv->msg);
678 case IB_CM_MRA_REQ_SENT:
680 case IB_CM_MRA_REP_SENT:
681 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
682 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
683 &cm_id_priv->av.port->cm_dev->ca_guid,
684 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
687 case IB_CM_ESTABLISHED:
688 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
689 ib_send_cm_dreq(cm_id, NULL, 0);
691 case IB_CM_DREQ_SENT:
692 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
693 (unsigned long) cm_id_priv->msg);
694 cm_enter_timewait(cm_id_priv);
695 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
697 case IB_CM_DREQ_RCVD:
698 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
699 ib_send_cm_drep(cm_id, NULL, 0);
702 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
706 cm_free_id(cm_id->local_id);
707 atomic_dec(&cm_id_priv->refcount);
708 wait_event(cm_id_priv->wait, !atomic_read(&cm_id_priv->refcount));
709 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
711 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
712 kfree(cm_id_priv->private_data);
715 EXPORT_SYMBOL(ib_destroy_cm_id);
717 int ib_cm_listen(struct ib_cm_id *cm_id,
721 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
725 service_mask = service_mask ? service_mask : ~0ULL;
726 service_id &= service_mask;
727 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
728 (service_id != IB_CM_ASSIGN_SERVICE_ID))
731 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
732 BUG_ON(cm_id->state != IB_CM_IDLE);
734 cm_id->state = IB_CM_LISTEN;
736 spin_lock_irqsave(&cm.lock, flags);
737 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
738 cm_id->service_id = __cpu_to_be64(cm.listen_service_id++);
739 cm_id->service_mask = ~0ULL;
741 cm_id->service_id = service_id;
742 cm_id->service_mask = service_mask;
744 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
745 spin_unlock_irqrestore(&cm.lock, flags);
747 if (cur_cm_id_priv) {
748 cm_id->state = IB_CM_IDLE;
753 EXPORT_SYMBOL(ib_cm_listen);
755 static u64 cm_form_tid(struct cm_id_private *cm_id_priv,
756 enum cm_msg_sequence msg_seq)
760 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
761 low_tid = (u64) (cm_id_priv->id.local_id | (msg_seq << 30));
762 return cpu_to_be64(hi_tid | low_tid);
765 static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
766 enum cm_msg_attr_id attr_id, u64 tid)
768 hdr->base_version = IB_MGMT_BASE_VERSION;
769 hdr->mgmt_class = IB_MGMT_CLASS_CM;
770 hdr->class_version = IB_CM_CLASS_VERSION;
771 hdr->method = IB_MGMT_METHOD_SEND;
772 hdr->attr_id = attr_id;
776 static void cm_format_req(struct cm_req_msg *req_msg,
777 struct cm_id_private *cm_id_priv,
778 struct ib_cm_req_param *param)
780 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
781 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
783 req_msg->local_comm_id = cm_id_priv->id.local_id;
784 req_msg->service_id = param->service_id;
785 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
786 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
787 cm_req_set_resp_res(req_msg, param->responder_resources);
788 cm_req_set_init_depth(req_msg, param->initiator_depth);
789 cm_req_set_remote_resp_timeout(req_msg,
790 param->remote_cm_response_timeout);
791 cm_req_set_qp_type(req_msg, param->qp_type);
792 cm_req_set_flow_ctrl(req_msg, param->flow_control);
793 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
794 cm_req_set_local_resp_timeout(req_msg,
795 param->local_cm_response_timeout);
796 cm_req_set_retry_count(req_msg, param->retry_count);
797 req_msg->pkey = param->primary_path->pkey;
798 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
799 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
800 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
801 cm_req_set_srq(req_msg, param->srq);
803 req_msg->primary_local_lid = param->primary_path->slid;
804 req_msg->primary_remote_lid = param->primary_path->dlid;
805 req_msg->primary_local_gid = param->primary_path->sgid;
806 req_msg->primary_remote_gid = param->primary_path->dgid;
807 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
808 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
809 req_msg->primary_traffic_class = param->primary_path->traffic_class;
810 req_msg->primary_hop_limit = param->primary_path->hop_limit;
811 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
812 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
813 cm_req_set_primary_local_ack_timeout(req_msg,
814 min(31, param->primary_path->packet_life_time + 1));
816 if (param->alternate_path) {
817 req_msg->alt_local_lid = param->alternate_path->slid;
818 req_msg->alt_remote_lid = param->alternate_path->dlid;
819 req_msg->alt_local_gid = param->alternate_path->sgid;
820 req_msg->alt_remote_gid = param->alternate_path->dgid;
821 cm_req_set_alt_flow_label(req_msg,
822 param->alternate_path->flow_label);
823 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
824 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
825 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
826 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
827 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
828 cm_req_set_alt_local_ack_timeout(req_msg,
829 min(31, param->alternate_path->packet_life_time + 1));
832 if (param->private_data && param->private_data_len)
833 memcpy(req_msg->private_data, param->private_data,
834 param->private_data_len);
837 static inline int cm_validate_req_param(struct ib_cm_req_param *param)
839 /* peer-to-peer not supported */
840 if (param->peer_to_peer)
843 if (!param->primary_path)
846 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
849 if (param->private_data &&
850 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
853 if (param->alternate_path &&
854 (param->alternate_path->pkey != param->primary_path->pkey ||
855 param->alternate_path->mtu != param->primary_path->mtu))
861 int ib_send_cm_req(struct ib_cm_id *cm_id,
862 struct ib_cm_req_param *param)
864 struct cm_id_private *cm_id_priv;
865 struct ib_send_wr *bad_send_wr;
866 struct cm_req_msg *req_msg;
870 ret = cm_validate_req_param(param);
874 /* Verify that we're not in timewait. */
875 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
876 spin_lock_irqsave(&cm_id_priv->lock, flags);
877 if (cm_id->state != IB_CM_IDLE) {
878 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
882 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
884 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
886 if (IS_ERR(cm_id_priv->timewait_info))
889 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
892 if (param->alternate_path) {
893 ret = cm_init_av_by_path(param->alternate_path,
894 &cm_id_priv->alt_av);
898 cm_id->service_id = param->service_id;
899 cm_id->service_mask = ~0ULL;
900 cm_id_priv->timeout_ms = cm_convert_to_ms(
901 param->primary_path->packet_life_time) * 2 +
903 param->remote_cm_response_timeout);
904 cm_id_priv->max_cm_retries = param->max_cm_retries;
905 cm_id_priv->initiator_depth = param->initiator_depth;
906 cm_id_priv->responder_resources = param->responder_resources;
907 cm_id_priv->retry_count = param->retry_count;
908 cm_id_priv->path_mtu = param->primary_path->mtu;
910 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
914 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
915 cm_format_req(req_msg, cm_id_priv, param);
916 cm_id_priv->tid = req_msg->hdr.tid;
917 cm_id_priv->msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
918 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
920 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
921 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
922 cm_id_priv->local_ack_timeout =
923 cm_req_get_primary_local_ack_timeout(req_msg);
925 spin_lock_irqsave(&cm_id_priv->lock, flags);
926 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
927 &cm_id_priv->msg->send_wr, &bad_send_wr);
929 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
932 BUG_ON(cm_id->state != IB_CM_IDLE);
933 cm_id->state = IB_CM_REQ_SENT;
934 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
937 error2: cm_free_msg(cm_id_priv->msg);
938 error1: kfree(cm_id_priv->timewait_info);
941 EXPORT_SYMBOL(ib_send_cm_req);
943 static int cm_issue_rej(struct cm_port *port,
944 struct ib_mad_recv_wc *mad_recv_wc,
945 enum ib_cm_rej_reason reason,
946 enum cm_msg_response msg_rejected,
947 void *ari, u8 ari_length)
949 struct ib_mad_send_buf *msg = NULL;
950 struct ib_send_wr *bad_send_wr;
951 struct cm_rej_msg *rej_msg, *rcv_msg;
954 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
958 /* We just need common CM header information. Cast to any message. */
959 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
960 rej_msg = (struct cm_rej_msg *) msg->mad;
962 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
963 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
964 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
965 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
966 rej_msg->reason = reason;
968 if (ari && ari_length) {
969 cm_rej_set_reject_info_len(rej_msg, ari_length);
970 memcpy(rej_msg->ari, ari, ari_length);
973 ret = ib_post_send_mad(port->mad_agent, &msg->send_wr, &bad_send_wr);
980 static inline int cm_is_active_peer(u64 local_ca_guid, u64 remote_ca_guid,
981 u32 local_qpn, u32 remote_qpn)
983 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
984 ((local_ca_guid == remote_ca_guid) &&
985 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
988 static inline void cm_format_paths_from_req(struct cm_req_msg *req_msg,
989 struct ib_sa_path_rec *primary_path,
990 struct ib_sa_path_rec *alt_path)
992 memset(primary_path, 0, sizeof *primary_path);
993 primary_path->dgid = req_msg->primary_local_gid;
994 primary_path->sgid = req_msg->primary_remote_gid;
995 primary_path->dlid = req_msg->primary_local_lid;
996 primary_path->slid = req_msg->primary_remote_lid;
997 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
998 primary_path->hop_limit = req_msg->primary_hop_limit;
999 primary_path->traffic_class = req_msg->primary_traffic_class;
1000 primary_path->reversible = 1;
1001 primary_path->pkey = req_msg->pkey;
1002 primary_path->sl = cm_req_get_primary_sl(req_msg);
1003 primary_path->mtu_selector = IB_SA_EQ;
1004 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1005 primary_path->rate_selector = IB_SA_EQ;
1006 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1007 primary_path->packet_life_time_selector = IB_SA_EQ;
1008 primary_path->packet_life_time =
1009 cm_req_get_primary_local_ack_timeout(req_msg);
1010 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1012 if (req_msg->alt_local_lid) {
1013 memset(alt_path, 0, sizeof *alt_path);
1014 alt_path->dgid = req_msg->alt_local_gid;
1015 alt_path->sgid = req_msg->alt_remote_gid;
1016 alt_path->dlid = req_msg->alt_local_lid;
1017 alt_path->slid = req_msg->alt_remote_lid;
1018 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1019 alt_path->hop_limit = req_msg->alt_hop_limit;
1020 alt_path->traffic_class = req_msg->alt_traffic_class;
1021 alt_path->reversible = 1;
1022 alt_path->pkey = req_msg->pkey;
1023 alt_path->sl = cm_req_get_alt_sl(req_msg);
1024 alt_path->mtu_selector = IB_SA_EQ;
1025 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1026 alt_path->rate_selector = IB_SA_EQ;
1027 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1028 alt_path->packet_life_time_selector = IB_SA_EQ;
1029 alt_path->packet_life_time =
1030 cm_req_get_alt_local_ack_timeout(req_msg);
1031 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1035 static void cm_format_req_event(struct cm_work *work,
1036 struct cm_id_private *cm_id_priv,
1037 struct ib_cm_id *listen_id)
1039 struct cm_req_msg *req_msg;
1040 struct ib_cm_req_event_param *param;
1042 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1043 param = &work->cm_event.param.req_rcvd;
1044 param->listen_id = listen_id;
1045 param->device = cm_id_priv->av.port->mad_agent->device;
1046 param->port = cm_id_priv->av.port->port_num;
1047 param->primary_path = &work->path[0];
1048 if (req_msg->alt_local_lid)
1049 param->alternate_path = &work->path[1];
1051 param->alternate_path = NULL;
1052 param->remote_ca_guid = req_msg->local_ca_guid;
1053 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1054 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1055 param->qp_type = cm_req_get_qp_type(req_msg);
1056 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1057 param->responder_resources = cm_req_get_init_depth(req_msg);
1058 param->initiator_depth = cm_req_get_resp_res(req_msg);
1059 param->local_cm_response_timeout =
1060 cm_req_get_remote_resp_timeout(req_msg);
1061 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1062 param->remote_cm_response_timeout =
1063 cm_req_get_local_resp_timeout(req_msg);
1064 param->retry_count = cm_req_get_retry_count(req_msg);
1065 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1066 param->srq = cm_req_get_srq(req_msg);
1067 work->cm_event.private_data = &req_msg->private_data;
1070 static void cm_process_work(struct cm_id_private *cm_id_priv,
1071 struct cm_work *work)
1073 unsigned long flags;
1076 /* We will typically only have the current event to report. */
1077 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1080 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1081 spin_lock_irqsave(&cm_id_priv->lock, flags);
1082 work = cm_dequeue_work(cm_id_priv);
1083 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1085 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1089 cm_deref_id(cm_id_priv);
1091 ib_destroy_cm_id(&cm_id_priv->id);
1094 static void cm_format_mra(struct cm_mra_msg *mra_msg,
1095 struct cm_id_private *cm_id_priv,
1096 enum cm_msg_response msg_mraed, u8 service_timeout,
1097 const void *private_data, u8 private_data_len)
1099 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1100 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1101 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1102 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1103 cm_mra_set_service_timeout(mra_msg, service_timeout);
1105 if (private_data && private_data_len)
1106 memcpy(mra_msg->private_data, private_data, private_data_len);
1109 static void cm_format_rej(struct cm_rej_msg *rej_msg,
1110 struct cm_id_private *cm_id_priv,
1111 enum ib_cm_rej_reason reason,
1114 const void *private_data,
1115 u8 private_data_len)
1117 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1118 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1120 switch(cm_id_priv->id.state) {
1121 case IB_CM_REQ_RCVD:
1122 rej_msg->local_comm_id = 0;
1123 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1125 case IB_CM_MRA_REQ_SENT:
1126 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1127 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1129 case IB_CM_REP_RCVD:
1130 case IB_CM_MRA_REP_SENT:
1131 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1132 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1135 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1136 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1140 rej_msg->reason = reason;
1141 if (ari && ari_length) {
1142 cm_rej_set_reject_info_len(rej_msg, ari_length);
1143 memcpy(rej_msg->ari, ari, ari_length);
1146 if (private_data && private_data_len)
1147 memcpy(rej_msg->private_data, private_data, private_data_len);
1150 static void cm_dup_req_handler(struct cm_work *work,
1151 struct cm_id_private *cm_id_priv)
1153 struct ib_mad_send_buf *msg = NULL;
1154 struct ib_send_wr *bad_send_wr;
1155 unsigned long flags;
1158 /* Quick state check to discard duplicate REQs. */
1159 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1162 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1166 spin_lock_irqsave(&cm_id_priv->lock, flags);
1167 switch (cm_id_priv->id.state) {
1168 case IB_CM_MRA_REQ_SENT:
1169 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1170 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1171 cm_id_priv->private_data,
1172 cm_id_priv->private_data_len);
1174 case IB_CM_TIMEWAIT:
1175 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1176 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1181 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1183 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr,
1189 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1190 free: cm_free_msg(msg);
1193 static struct cm_id_private * cm_match_req(struct cm_work *work,
1194 struct cm_id_private *cm_id_priv)
1196 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1197 struct cm_timewait_info *timewait_info;
1198 struct cm_req_msg *req_msg;
1199 unsigned long flags;
1201 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1203 /* Check for duplicate REQ and stale connections. */
1204 spin_lock_irqsave(&cm.lock, flags);
1205 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1207 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1209 if (timewait_info) {
1210 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1211 timewait_info->work.remote_id);
1212 spin_unlock_irqrestore(&cm.lock, flags);
1213 if (cur_cm_id_priv) {
1214 cm_dup_req_handler(work, cur_cm_id_priv);
1215 cm_deref_id(cur_cm_id_priv);
1217 cm_issue_rej(work->port, work->mad_recv_wc,
1218 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1223 /* Find matching listen request. */
1224 listen_cm_id_priv = cm_find_listen(req_msg->service_id);
1225 if (!listen_cm_id_priv) {
1226 spin_unlock_irqrestore(&cm.lock, flags);
1227 cm_issue_rej(work->port, work->mad_recv_wc,
1228 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1232 atomic_inc(&listen_cm_id_priv->refcount);
1233 atomic_inc(&cm_id_priv->refcount);
1234 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1235 atomic_inc(&cm_id_priv->work_count);
1236 spin_unlock_irqrestore(&cm.lock, flags);
1237 return listen_cm_id_priv;
1239 error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1243 static int cm_req_handler(struct cm_work *work)
1245 struct ib_cm_id *cm_id;
1246 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1247 struct cm_req_msg *req_msg;
1250 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1252 cm_id = ib_create_cm_id(NULL, NULL);
1254 return PTR_ERR(cm_id);
1256 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1257 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1258 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
1260 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1262 if (IS_ERR(cm_id_priv->timewait_info)) {
1263 ret = PTR_ERR(cm_id_priv->timewait_info);
1266 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1267 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1268 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1270 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1271 if (!listen_cm_id_priv) {
1276 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1277 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1278 cm_id_priv->id.service_id = req_msg->service_id;
1279 cm_id_priv->id.service_mask = ~0ULL;
1281 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1282 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1285 if (req_msg->alt_local_lid) {
1286 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1290 cm_id_priv->tid = req_msg->hdr.tid;
1291 cm_id_priv->timeout_ms = cm_convert_to_ms(
1292 cm_req_get_local_resp_timeout(req_msg));
1293 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1294 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1295 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1296 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1297 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1298 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1299 cm_id_priv->local_ack_timeout =
1300 cm_req_get_primary_local_ack_timeout(req_msg);
1301 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1302 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1304 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1305 cm_process_work(cm_id_priv, work);
1306 cm_deref_id(listen_cm_id_priv);
1309 error3: atomic_dec(&cm_id_priv->refcount);
1310 cm_deref_id(listen_cm_id_priv);
1311 cm_cleanup_timewait(cm_id_priv->timewait_info);
1312 error2: kfree(cm_id_priv->timewait_info);
1313 error1: ib_destroy_cm_id(&cm_id_priv->id);
1317 static void cm_format_rep(struct cm_rep_msg *rep_msg,
1318 struct cm_id_private *cm_id_priv,
1319 struct ib_cm_rep_param *param)
1321 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1322 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1323 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1324 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1325 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1326 rep_msg->resp_resources = param->responder_resources;
1327 rep_msg->initiator_depth = param->initiator_depth;
1328 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1329 cm_rep_set_failover(rep_msg, param->failover_accepted);
1330 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1331 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1332 cm_rep_set_srq(rep_msg, param->srq);
1333 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1335 if (param->private_data && param->private_data_len)
1336 memcpy(rep_msg->private_data, param->private_data,
1337 param->private_data_len);
1340 int ib_send_cm_rep(struct ib_cm_id *cm_id,
1341 struct ib_cm_rep_param *param)
1343 struct cm_id_private *cm_id_priv;
1344 struct ib_mad_send_buf *msg;
1345 struct cm_rep_msg *rep_msg;
1346 struct ib_send_wr *bad_send_wr;
1347 unsigned long flags;
1350 if (param->private_data &&
1351 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1354 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1355 spin_lock_irqsave(&cm_id_priv->lock, flags);
1356 if (cm_id->state != IB_CM_REQ_RCVD &&
1357 cm_id->state != IB_CM_MRA_REQ_SENT) {
1362 ret = cm_alloc_msg(cm_id_priv, &msg);
1366 rep_msg = (struct cm_rep_msg *) msg->mad;
1367 cm_format_rep(rep_msg, cm_id_priv, param);
1368 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
1369 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1371 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1372 &msg->send_wr, &bad_send_wr);
1374 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1379 cm_id->state = IB_CM_REP_SENT;
1380 cm_id_priv->msg = msg;
1381 cm_id_priv->initiator_depth = param->initiator_depth;
1382 cm_id_priv->responder_resources = param->responder_resources;
1383 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1384 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1386 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1389 EXPORT_SYMBOL(ib_send_cm_rep);
1391 static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1392 struct cm_id_private *cm_id_priv,
1393 const void *private_data,
1394 u8 private_data_len)
1396 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1397 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1398 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1400 if (private_data && private_data_len)
1401 memcpy(rtu_msg->private_data, private_data, private_data_len);
1404 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1405 const void *private_data,
1406 u8 private_data_len)
1408 struct cm_id_private *cm_id_priv;
1409 struct ib_mad_send_buf *msg;
1410 struct ib_send_wr *bad_send_wr;
1411 unsigned long flags;
1415 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1418 data = cm_copy_private_data(private_data, private_data_len);
1420 return PTR_ERR(data);
1422 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1423 spin_lock_irqsave(&cm_id_priv->lock, flags);
1424 if (cm_id->state != IB_CM_REP_RCVD &&
1425 cm_id->state != IB_CM_MRA_REP_SENT) {
1430 ret = cm_alloc_msg(cm_id_priv, &msg);
1434 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1435 private_data, private_data_len);
1437 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1438 &msg->send_wr, &bad_send_wr);
1440 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1446 cm_id->state = IB_CM_ESTABLISHED;
1447 cm_set_private_data(cm_id_priv, data, private_data_len);
1448 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1451 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1455 EXPORT_SYMBOL(ib_send_cm_rtu);
1457 static void cm_format_rep_event(struct cm_work *work)
1459 struct cm_rep_msg *rep_msg;
1460 struct ib_cm_rep_event_param *param;
1462 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1463 param = &work->cm_event.param.rep_rcvd;
1464 param->remote_ca_guid = rep_msg->local_ca_guid;
1465 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1466 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1467 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1468 param->responder_resources = rep_msg->initiator_depth;
1469 param->initiator_depth = rep_msg->resp_resources;
1470 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1471 param->failover_accepted = cm_rep_get_failover(rep_msg);
1472 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1473 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1474 param->srq = cm_rep_get_srq(rep_msg);
1475 work->cm_event.private_data = &rep_msg->private_data;
1478 static void cm_dup_rep_handler(struct cm_work *work)
1480 struct cm_id_private *cm_id_priv;
1481 struct cm_rep_msg *rep_msg;
1482 struct ib_mad_send_buf *msg = NULL;
1483 struct ib_send_wr *bad_send_wr;
1484 unsigned long flags;
1487 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1488 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1489 rep_msg->local_comm_id);
1493 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1497 spin_lock_irqsave(&cm_id_priv->lock, flags);
1498 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1499 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1500 cm_id_priv->private_data,
1501 cm_id_priv->private_data_len);
1502 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1503 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1504 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1505 cm_id_priv->private_data,
1506 cm_id_priv->private_data_len);
1509 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1511 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr,
1517 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1518 free: cm_free_msg(msg);
1519 deref: cm_deref_id(cm_id_priv);
1522 static int cm_rep_handler(struct cm_work *work)
1524 struct cm_id_private *cm_id_priv;
1525 struct cm_rep_msg *rep_msg;
1526 unsigned long flags;
1529 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1530 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1532 cm_dup_rep_handler(work);
1536 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1537 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1538 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1540 spin_lock_irqsave(&cm.lock, flags);
1541 /* Check for duplicate REP. */
1542 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
1543 spin_unlock_irqrestore(&cm.lock, flags);
1547 /* Check for a stale connection. */
1548 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
1549 spin_unlock_irqrestore(&cm.lock, flags);
1550 cm_issue_rej(work->port, work->mad_recv_wc,
1551 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1556 spin_unlock_irqrestore(&cm.lock, flags);
1558 cm_format_rep_event(work);
1560 spin_lock_irqsave(&cm_id_priv->lock, flags);
1561 switch (cm_id_priv->id.state) {
1562 case IB_CM_REQ_SENT:
1563 case IB_CM_MRA_REQ_RCVD:
1566 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1570 cm_id_priv->id.state = IB_CM_REP_RCVD;
1571 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1572 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1573 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1574 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1575 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1576 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1578 /* todo: handle peer_to_peer */
1580 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1581 (unsigned long) cm_id_priv->msg);
1582 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1584 list_add_tail(&work->list, &cm_id_priv->work_list);
1585 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1588 cm_process_work(cm_id_priv, work);
1590 cm_deref_id(cm_id_priv);
1593 error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1594 cm_deref_id(cm_id_priv);
1598 static int cm_establish_handler(struct cm_work *work)
1600 struct cm_id_private *cm_id_priv;
1601 unsigned long flags;
1604 /* See comment in ib_cm_establish about lookup. */
1605 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1609 spin_lock_irqsave(&cm_id_priv->lock, flags);
1610 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1611 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1615 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1616 (unsigned long) cm_id_priv->msg);
1617 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1619 list_add_tail(&work->list, &cm_id_priv->work_list);
1620 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1623 cm_process_work(cm_id_priv, work);
1625 cm_deref_id(cm_id_priv);
1628 cm_deref_id(cm_id_priv);
1632 static int cm_rtu_handler(struct cm_work *work)
1634 struct cm_id_private *cm_id_priv;
1635 struct cm_rtu_msg *rtu_msg;
1636 unsigned long flags;
1639 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1640 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1641 rtu_msg->local_comm_id);
1645 work->cm_event.private_data = &rtu_msg->private_data;
1647 spin_lock_irqsave(&cm_id_priv->lock, flags);
1648 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1649 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1650 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1653 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1655 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1656 (unsigned long) cm_id_priv->msg);
1657 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1659 list_add_tail(&work->list, &cm_id_priv->work_list);
1660 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1663 cm_process_work(cm_id_priv, work);
1665 cm_deref_id(cm_id_priv);
1668 cm_deref_id(cm_id_priv);
1672 static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1673 struct cm_id_private *cm_id_priv,
1674 const void *private_data,
1675 u8 private_data_len)
1677 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1678 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1679 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1680 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1681 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1683 if (private_data && private_data_len)
1684 memcpy(dreq_msg->private_data, private_data, private_data_len);
1687 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1688 const void *private_data,
1689 u8 private_data_len)
1691 struct cm_id_private *cm_id_priv;
1692 struct ib_mad_send_buf *msg;
1693 struct ib_send_wr *bad_send_wr;
1694 unsigned long flags;
1697 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1700 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1701 spin_lock_irqsave(&cm_id_priv->lock, flags);
1702 if (cm_id->state != IB_CM_ESTABLISHED) {
1707 ret = cm_alloc_msg(cm_id_priv, &msg);
1709 cm_enter_timewait(cm_id_priv);
1713 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1714 private_data, private_data_len);
1715 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
1716 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1718 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1719 &msg->send_wr, &bad_send_wr);
1721 cm_enter_timewait(cm_id_priv);
1722 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1727 cm_id->state = IB_CM_DREQ_SENT;
1728 cm_id_priv->msg = msg;
1729 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1732 EXPORT_SYMBOL(ib_send_cm_dreq);
1734 static void cm_format_drep(struct cm_drep_msg *drep_msg,
1735 struct cm_id_private *cm_id_priv,
1736 const void *private_data,
1737 u8 private_data_len)
1739 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1740 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1741 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1743 if (private_data && private_data_len)
1744 memcpy(drep_msg->private_data, private_data, private_data_len);
1747 int ib_send_cm_drep(struct ib_cm_id *cm_id,
1748 const void *private_data,
1749 u8 private_data_len)
1751 struct cm_id_private *cm_id_priv;
1752 struct ib_mad_send_buf *msg;
1753 struct ib_send_wr *bad_send_wr;
1754 unsigned long flags;
1758 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1761 data = cm_copy_private_data(private_data, private_data_len);
1763 return PTR_ERR(data);
1765 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1766 spin_lock_irqsave(&cm_id_priv->lock, flags);
1767 if (cm_id->state != IB_CM_DREQ_RCVD) {
1768 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1773 cm_set_private_data(cm_id_priv, data, private_data_len);
1774 cm_enter_timewait(cm_id_priv);
1776 ret = cm_alloc_msg(cm_id_priv, &msg);
1780 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1781 private_data, private_data_len);
1783 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr,
1786 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1791 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1794 EXPORT_SYMBOL(ib_send_cm_drep);
1796 static int cm_dreq_handler(struct cm_work *work)
1798 struct cm_id_private *cm_id_priv;
1799 struct cm_dreq_msg *dreq_msg;
1800 struct ib_mad_send_buf *msg = NULL;
1801 struct ib_send_wr *bad_send_wr;
1802 unsigned long flags;
1805 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1806 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1807 dreq_msg->local_comm_id);
1811 work->cm_event.private_data = &dreq_msg->private_data;
1813 spin_lock_irqsave(&cm_id_priv->lock, flags);
1814 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1817 switch (cm_id_priv->id.state) {
1818 case IB_CM_REP_SENT:
1819 case IB_CM_DREQ_SENT:
1820 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1821 (unsigned long) cm_id_priv->msg);
1823 case IB_CM_ESTABLISHED:
1824 case IB_CM_MRA_REP_RCVD:
1826 case IB_CM_TIMEWAIT:
1827 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1830 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1831 cm_id_priv->private_data,
1832 cm_id_priv->private_data_len);
1833 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1835 if (ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1836 &msg->send_wr, &bad_send_wr))
1842 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1843 cm_id_priv->tid = dreq_msg->hdr.tid;
1844 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1846 list_add_tail(&work->list, &cm_id_priv->work_list);
1847 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1850 cm_process_work(cm_id_priv, work);
1852 cm_deref_id(cm_id_priv);
1855 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1856 deref: cm_deref_id(cm_id_priv);
1860 static int cm_drep_handler(struct cm_work *work)
1862 struct cm_id_private *cm_id_priv;
1863 struct cm_drep_msg *drep_msg;
1864 unsigned long flags;
1867 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
1868 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
1869 drep_msg->local_comm_id);
1873 work->cm_event.private_data = &drep_msg->private_data;
1875 spin_lock_irqsave(&cm_id_priv->lock, flags);
1876 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
1877 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
1878 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1881 cm_enter_timewait(cm_id_priv);
1883 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1884 (unsigned long) cm_id_priv->msg);
1885 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1887 list_add_tail(&work->list, &cm_id_priv->work_list);
1888 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1891 cm_process_work(cm_id_priv, work);
1893 cm_deref_id(cm_id_priv);
1896 cm_deref_id(cm_id_priv);
1900 int ib_send_cm_rej(struct ib_cm_id *cm_id,
1901 enum ib_cm_rej_reason reason,
1904 const void *private_data,
1905 u8 private_data_len)
1907 struct cm_id_private *cm_id_priv;
1908 struct ib_mad_send_buf *msg;
1909 struct ib_send_wr *bad_send_wr;
1910 unsigned long flags;
1913 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
1914 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
1917 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1919 spin_lock_irqsave(&cm_id_priv->lock, flags);
1920 switch (cm_id->state) {
1921 case IB_CM_REQ_SENT:
1922 case IB_CM_MRA_REQ_RCVD:
1923 case IB_CM_REQ_RCVD:
1924 case IB_CM_MRA_REQ_SENT:
1925 case IB_CM_REP_RCVD:
1926 case IB_CM_MRA_REP_SENT:
1927 ret = cm_alloc_msg(cm_id_priv, &msg);
1929 cm_format_rej((struct cm_rej_msg *) msg->mad,
1930 cm_id_priv, reason, ari, ari_length,
1931 private_data, private_data_len);
1933 cm_reset_to_idle(cm_id_priv);
1935 case IB_CM_REP_SENT:
1936 case IB_CM_MRA_REP_RCVD:
1937 ret = cm_alloc_msg(cm_id_priv, &msg);
1939 cm_format_rej((struct cm_rej_msg *) msg->mad,
1940 cm_id_priv, reason, ari, ari_length,
1941 private_data, private_data_len);
1943 cm_enter_timewait(cm_id_priv);
1953 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1954 &msg->send_wr, &bad_send_wr);
1958 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1961 EXPORT_SYMBOL(ib_send_cm_rej);
1963 static void cm_format_rej_event(struct cm_work *work)
1965 struct cm_rej_msg *rej_msg;
1966 struct ib_cm_rej_event_param *param;
1968 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
1969 param = &work->cm_event.param.rej_rcvd;
1970 param->ari = rej_msg->ari;
1971 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
1972 param->reason = rej_msg->reason;
1973 work->cm_event.private_data = &rej_msg->private_data;
1976 static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
1978 struct cm_timewait_info *timewait_info;
1979 struct cm_id_private *cm_id_priv;
1980 unsigned long flags;
1983 remote_id = rej_msg->local_comm_id;
1985 if (rej_msg->reason == IB_CM_REJ_TIMEOUT) {
1986 spin_lock_irqsave(&cm.lock, flags);
1987 timewait_info = cm_find_remote_id( *((u64 *) rej_msg->ari),
1989 if (!timewait_info) {
1990 spin_unlock_irqrestore(&cm.lock, flags);
1993 cm_id_priv = idr_find(&cm.local_id_table,
1994 (int) timewait_info->work.local_id);
1996 if (cm_id_priv->id.remote_id == remote_id)
1997 atomic_inc(&cm_id_priv->refcount);
2001 spin_unlock_irqrestore(&cm.lock, flags);
2002 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2003 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2005 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2010 static int cm_rej_handler(struct cm_work *work)
2012 struct cm_id_private *cm_id_priv;
2013 struct cm_rej_msg *rej_msg;
2014 unsigned long flags;
2017 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2018 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2022 cm_format_rej_event(work);
2024 spin_lock_irqsave(&cm_id_priv->lock, flags);
2025 switch (cm_id_priv->id.state) {
2026 case IB_CM_REQ_SENT:
2027 case IB_CM_MRA_REQ_RCVD:
2028 case IB_CM_REP_SENT:
2029 case IB_CM_MRA_REP_RCVD:
2030 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2031 (unsigned long) cm_id_priv->msg);
2033 case IB_CM_REQ_RCVD:
2034 case IB_CM_MRA_REQ_SENT:
2035 if (rej_msg->reason == IB_CM_REJ_STALE_CONN)
2036 cm_enter_timewait(cm_id_priv);
2038 cm_reset_to_idle(cm_id_priv);
2040 case IB_CM_DREQ_SENT:
2041 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2042 (unsigned long) cm_id_priv->msg);
2044 case IB_CM_REP_RCVD:
2045 case IB_CM_MRA_REP_SENT:
2046 case IB_CM_ESTABLISHED:
2047 cm_enter_timewait(cm_id_priv);
2050 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2055 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2057 list_add_tail(&work->list, &cm_id_priv->work_list);
2058 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2061 cm_process_work(cm_id_priv, work);
2063 cm_deref_id(cm_id_priv);
2066 cm_deref_id(cm_id_priv);
2070 int ib_send_cm_mra(struct ib_cm_id *cm_id,
2072 const void *private_data,
2073 u8 private_data_len)
2075 struct cm_id_private *cm_id_priv;
2076 struct ib_mad_send_buf *msg;
2077 struct ib_send_wr *bad_send_wr;
2079 unsigned long flags;
2082 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2085 data = cm_copy_private_data(private_data, private_data_len);
2087 return PTR_ERR(data);
2089 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2091 spin_lock_irqsave(&cm_id_priv->lock, flags);
2092 switch(cm_id_priv->id.state) {
2093 case IB_CM_REQ_RCVD:
2094 ret = cm_alloc_msg(cm_id_priv, &msg);
2098 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2099 CM_MSG_RESPONSE_REQ, service_timeout,
2100 private_data, private_data_len);
2101 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2102 &msg->send_wr, &bad_send_wr);
2105 cm_id->state = IB_CM_MRA_REQ_SENT;
2107 case IB_CM_REP_RCVD:
2108 ret = cm_alloc_msg(cm_id_priv, &msg);
2112 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2113 CM_MSG_RESPONSE_REP, service_timeout,
2114 private_data, private_data_len);
2115 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2116 &msg->send_wr, &bad_send_wr);
2119 cm_id->state = IB_CM_MRA_REP_SENT;
2121 case IB_CM_ESTABLISHED:
2122 ret = cm_alloc_msg(cm_id_priv, &msg);
2126 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2127 CM_MSG_RESPONSE_OTHER, service_timeout,
2128 private_data, private_data_len);
2129 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2130 &msg->send_wr, &bad_send_wr);
2133 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2139 cm_id_priv->service_timeout = service_timeout;
2140 cm_set_private_data(cm_id_priv, data, private_data_len);
2141 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2144 error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2148 error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2153 EXPORT_SYMBOL(ib_send_cm_mra);
2155 static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2157 switch (cm_mra_get_msg_mraed(mra_msg)) {
2158 case CM_MSG_RESPONSE_REQ:
2159 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2160 case CM_MSG_RESPONSE_REP:
2161 case CM_MSG_RESPONSE_OTHER:
2162 return cm_acquire_id(mra_msg->remote_comm_id,
2163 mra_msg->local_comm_id);
2169 static int cm_mra_handler(struct cm_work *work)
2171 struct cm_id_private *cm_id_priv;
2172 struct cm_mra_msg *mra_msg;
2173 unsigned long flags;
2176 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2177 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2181 work->cm_event.private_data = &mra_msg->private_data;
2182 work->cm_event.param.mra_rcvd.service_timeout =
2183 cm_mra_get_service_timeout(mra_msg);
2184 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2185 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2187 spin_lock_irqsave(&cm_id_priv->lock, flags);
2188 switch (cm_id_priv->id.state) {
2189 case IB_CM_REQ_SENT:
2190 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2191 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2192 (unsigned long) cm_id_priv->msg, timeout))
2194 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2196 case IB_CM_REP_SENT:
2197 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2198 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2199 (unsigned long) cm_id_priv->msg, timeout))
2201 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2203 case IB_CM_ESTABLISHED:
2204 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2205 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2206 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2207 (unsigned long) cm_id_priv->msg, timeout))
2209 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2215 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2216 cm_id_priv->id.state;
2217 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2219 list_add_tail(&work->list, &cm_id_priv->work_list);
2220 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2223 cm_process_work(cm_id_priv, work);
2225 cm_deref_id(cm_id_priv);
2228 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2229 cm_deref_id(cm_id_priv);
2233 static void cm_format_lap(struct cm_lap_msg *lap_msg,
2234 struct cm_id_private *cm_id_priv,
2235 struct ib_sa_path_rec *alternate_path,
2236 const void *private_data,
2237 u8 private_data_len)
2239 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2240 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2241 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2242 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2243 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2244 /* todo: need remote CM response timeout */
2245 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2246 lap_msg->alt_local_lid = alternate_path->slid;
2247 lap_msg->alt_remote_lid = alternate_path->dlid;
2248 lap_msg->alt_local_gid = alternate_path->sgid;
2249 lap_msg->alt_remote_gid = alternate_path->dgid;
2250 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2251 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2252 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2253 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2254 cm_lap_set_sl(lap_msg, alternate_path->sl);
2255 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2256 cm_lap_set_local_ack_timeout(lap_msg,
2257 min(31, alternate_path->packet_life_time + 1));
2259 if (private_data && private_data_len)
2260 memcpy(lap_msg->private_data, private_data, private_data_len);
2263 int ib_send_cm_lap(struct ib_cm_id *cm_id,
2264 struct ib_sa_path_rec *alternate_path,
2265 const void *private_data,
2266 u8 private_data_len)
2268 struct cm_id_private *cm_id_priv;
2269 struct ib_mad_send_buf *msg;
2270 struct ib_send_wr *bad_send_wr;
2271 unsigned long flags;
2274 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2277 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2278 spin_lock_irqsave(&cm_id_priv->lock, flags);
2279 if (cm_id->state != IB_CM_ESTABLISHED ||
2280 cm_id->lap_state != IB_CM_LAP_IDLE) {
2285 ret = cm_alloc_msg(cm_id_priv, &msg);
2289 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2290 alternate_path, private_data, private_data_len);
2291 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
2292 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2294 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2295 &msg->send_wr, &bad_send_wr);
2297 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2302 cm_id->lap_state = IB_CM_LAP_SENT;
2303 cm_id_priv->msg = msg;
2305 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2308 EXPORT_SYMBOL(ib_send_cm_lap);
2310 static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2311 struct cm_lap_msg *lap_msg)
2313 memset(path, 0, sizeof *path);
2314 path->dgid = lap_msg->alt_local_gid;
2315 path->sgid = lap_msg->alt_remote_gid;
2316 path->dlid = lap_msg->alt_local_lid;
2317 path->slid = lap_msg->alt_remote_lid;
2318 path->flow_label = cm_lap_get_flow_label(lap_msg);
2319 path->hop_limit = lap_msg->alt_hop_limit;
2320 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2321 path->reversible = 1;
2322 /* pkey is same as in REQ */
2323 path->sl = cm_lap_get_sl(lap_msg);
2324 path->mtu_selector = IB_SA_EQ;
2325 /* mtu is same as in REQ */
2326 path->rate_selector = IB_SA_EQ;
2327 path->rate = cm_lap_get_packet_rate(lap_msg);
2328 path->packet_life_time_selector = IB_SA_EQ;
2329 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2330 path->packet_life_time -= (path->packet_life_time > 0);
2333 static int cm_lap_handler(struct cm_work *work)
2335 struct cm_id_private *cm_id_priv;
2336 struct cm_lap_msg *lap_msg;
2337 struct ib_cm_lap_event_param *param;
2338 struct ib_mad_send_buf *msg = NULL;
2339 struct ib_send_wr *bad_send_wr;
2340 unsigned long flags;
2343 /* todo: verify LAP request and send reject APR if invalid. */
2344 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2345 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2346 lap_msg->local_comm_id);
2350 param = &work->cm_event.param.lap_rcvd;
2351 param->alternate_path = &work->path[0];
2352 cm_format_path_from_lap(param->alternate_path, lap_msg);
2353 work->cm_event.private_data = &lap_msg->private_data;
2355 spin_lock_irqsave(&cm_id_priv->lock, flags);
2356 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2359 switch (cm_id_priv->id.lap_state) {
2360 case IB_CM_LAP_IDLE:
2362 case IB_CM_MRA_LAP_SENT:
2363 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2366 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2367 CM_MSG_RESPONSE_OTHER,
2368 cm_id_priv->service_timeout,
2369 cm_id_priv->private_data,
2370 cm_id_priv->private_data_len);
2371 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2373 if (ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2374 &msg->send_wr, &bad_send_wr))
2381 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2382 cm_id_priv->tid = lap_msg->hdr.tid;
2383 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2385 list_add_tail(&work->list, &cm_id_priv->work_list);
2386 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2389 cm_process_work(cm_id_priv, work);
2391 cm_deref_id(cm_id_priv);
2394 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2395 deref: cm_deref_id(cm_id_priv);
2399 static void cm_format_apr(struct cm_apr_msg *apr_msg,
2400 struct cm_id_private *cm_id_priv,
2401 enum ib_cm_apr_status status,
2404 const void *private_data,
2405 u8 private_data_len)
2407 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2408 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2409 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2410 apr_msg->ap_status = (u8) status;
2412 if (info && info_length) {
2413 apr_msg->info_length = info_length;
2414 memcpy(apr_msg->info, info, info_length);
2417 if (private_data && private_data_len)
2418 memcpy(apr_msg->private_data, private_data, private_data_len);
2421 int ib_send_cm_apr(struct ib_cm_id *cm_id,
2422 enum ib_cm_apr_status status,
2425 const void *private_data,
2426 u8 private_data_len)
2428 struct cm_id_private *cm_id_priv;
2429 struct ib_mad_send_buf *msg;
2430 struct ib_send_wr *bad_send_wr;
2431 unsigned long flags;
2434 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2435 (info && info_length > IB_CM_APR_INFO_LENGTH))
2438 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2439 spin_lock_irqsave(&cm_id_priv->lock, flags);
2440 if (cm_id->state != IB_CM_ESTABLISHED ||
2441 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2442 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2447 ret = cm_alloc_msg(cm_id_priv, &msg);
2451 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2452 info, info_length, private_data, private_data_len);
2453 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2454 &msg->send_wr, &bad_send_wr);
2456 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2461 cm_id->lap_state = IB_CM_LAP_IDLE;
2462 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2465 EXPORT_SYMBOL(ib_send_cm_apr);
2467 static int cm_apr_handler(struct cm_work *work)
2469 struct cm_id_private *cm_id_priv;
2470 struct cm_apr_msg *apr_msg;
2471 unsigned long flags;
2474 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2475 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2476 apr_msg->local_comm_id);
2478 return -EINVAL; /* Unmatched reply. */
2480 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2481 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2482 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2483 work->cm_event.private_data = &apr_msg->private_data;
2485 spin_lock_irqsave(&cm_id_priv->lock, flags);
2486 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2487 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2488 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2489 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2492 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
2493 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2494 (unsigned long) cm_id_priv->msg);
2495 cm_id_priv->msg = NULL;
2497 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2499 list_add_tail(&work->list, &cm_id_priv->work_list);
2500 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2503 cm_process_work(cm_id_priv, work);
2505 cm_deref_id(cm_id_priv);
2508 cm_deref_id(cm_id_priv);
2512 static int cm_timewait_handler(struct cm_work *work)
2514 struct cm_timewait_info *timewait_info;
2515 struct cm_id_private *cm_id_priv;
2516 unsigned long flags;
2519 timewait_info = (struct cm_timewait_info *)work;
2520 cm_cleanup_timewait(timewait_info);
2522 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2523 timewait_info->work.remote_id);
2527 spin_lock_irqsave(&cm_id_priv->lock, flags);
2528 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2529 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2530 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2533 cm_id_priv->id.state = IB_CM_IDLE;
2534 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2536 list_add_tail(&work->list, &cm_id_priv->work_list);
2537 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2540 cm_process_work(cm_id_priv, work);
2542 cm_deref_id(cm_id_priv);
2545 cm_deref_id(cm_id_priv);
2549 static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2550 struct cm_id_private *cm_id_priv,
2551 struct ib_cm_sidr_req_param *param)
2553 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2554 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2555 sidr_req_msg->request_id = cm_id_priv->id.local_id;
2556 sidr_req_msg->pkey = param->pkey;
2557 sidr_req_msg->service_id = param->service_id;
2559 if (param->private_data && param->private_data_len)
2560 memcpy(sidr_req_msg->private_data, param->private_data,
2561 param->private_data_len);
2564 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2565 struct ib_cm_sidr_req_param *param)
2567 struct cm_id_private *cm_id_priv;
2568 struct ib_mad_send_buf *msg;
2569 struct ib_send_wr *bad_send_wr;
2570 unsigned long flags;
2573 if (!param->path || (param->private_data &&
2574 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2577 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2578 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2582 cm_id->service_id = param->service_id;
2583 cm_id->service_mask = ~0ULL;
2584 cm_id_priv->timeout_ms = param->timeout_ms;
2585 cm_id_priv->max_cm_retries = param->max_cm_retries;
2586 ret = cm_alloc_msg(cm_id_priv, &msg);
2590 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2592 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
2593 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2595 spin_lock_irqsave(&cm_id_priv->lock, flags);
2596 if (cm_id->state == IB_CM_IDLE)
2597 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2598 &msg->send_wr, &bad_send_wr);
2603 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2607 cm_id->state = IB_CM_SIDR_REQ_SENT;
2608 cm_id_priv->msg = msg;
2609 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2613 EXPORT_SYMBOL(ib_send_cm_sidr_req);
2615 static void cm_format_sidr_req_event(struct cm_work *work,
2616 struct ib_cm_id *listen_id)
2618 struct cm_sidr_req_msg *sidr_req_msg;
2619 struct ib_cm_sidr_req_event_param *param;
2621 sidr_req_msg = (struct cm_sidr_req_msg *)
2622 work->mad_recv_wc->recv_buf.mad;
2623 param = &work->cm_event.param.sidr_req_rcvd;
2624 param->pkey = sidr_req_msg->pkey;
2625 param->listen_id = listen_id;
2626 param->device = work->port->mad_agent->device;
2627 param->port = work->port->port_num;
2628 work->cm_event.private_data = &sidr_req_msg->private_data;
2631 static int cm_sidr_req_handler(struct cm_work *work)
2633 struct ib_cm_id *cm_id;
2634 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2635 struct cm_sidr_req_msg *sidr_req_msg;
2637 unsigned long flags;
2639 cm_id = ib_create_cm_id(NULL, NULL);
2641 return PTR_ERR(cm_id);
2642 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2644 /* Record SGID/SLID and request ID for lookup. */
2645 sidr_req_msg = (struct cm_sidr_req_msg *)
2646 work->mad_recv_wc->recv_buf.mad;
2647 wc = work->mad_recv_wc->wc;
2648 cm_id_priv->av.dgid.global.subnet_prefix = wc->slid;
2649 cm_id_priv->av.dgid.global.interface_id = 0;
2650 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2652 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2653 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2654 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2655 atomic_inc(&cm_id_priv->work_count);
2657 spin_lock_irqsave(&cm.lock, flags);
2658 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2659 if (cur_cm_id_priv) {
2660 spin_unlock_irqrestore(&cm.lock, flags);
2661 goto out; /* Duplicate message. */
2663 cur_cm_id_priv = cm_find_listen(sidr_req_msg->service_id);
2664 if (!cur_cm_id_priv) {
2665 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2666 spin_unlock_irqrestore(&cm.lock, flags);
2667 /* todo: reply with no match */
2668 goto out; /* No match. */
2670 atomic_inc(&cur_cm_id_priv->refcount);
2671 spin_unlock_irqrestore(&cm.lock, flags);
2673 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2674 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2675 cm_id_priv->id.service_id = sidr_req_msg->service_id;
2676 cm_id_priv->id.service_mask = ~0ULL;
2678 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2679 cm_process_work(cm_id_priv, work);
2680 cm_deref_id(cur_cm_id_priv);
2683 ib_destroy_cm_id(&cm_id_priv->id);
2687 static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2688 struct cm_id_private *cm_id_priv,
2689 struct ib_cm_sidr_rep_param *param)
2691 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2693 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2694 sidr_rep_msg->status = param->status;
2695 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2696 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2697 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2699 if (param->info && param->info_length)
2700 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2702 if (param->private_data && param->private_data_len)
2703 memcpy(sidr_rep_msg->private_data, param->private_data,
2704 param->private_data_len);
2707 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2708 struct ib_cm_sidr_rep_param *param)
2710 struct cm_id_private *cm_id_priv;
2711 struct ib_mad_send_buf *msg;
2712 struct ib_send_wr *bad_send_wr;
2713 unsigned long flags;
2716 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2717 (param->private_data &&
2718 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2721 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2722 spin_lock_irqsave(&cm_id_priv->lock, flags);
2723 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2728 ret = cm_alloc_msg(cm_id_priv, &msg);
2732 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2734 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2735 &msg->send_wr, &bad_send_wr);
2737 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2741 cm_id->state = IB_CM_IDLE;
2742 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2744 spin_lock_irqsave(&cm.lock, flags);
2745 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2746 spin_unlock_irqrestore(&cm.lock, flags);
2749 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2752 EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2754 static void cm_format_sidr_rep_event(struct cm_work *work)
2756 struct cm_sidr_rep_msg *sidr_rep_msg;
2757 struct ib_cm_sidr_rep_event_param *param;
2759 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2760 work->mad_recv_wc->recv_buf.mad;
2761 param = &work->cm_event.param.sidr_rep_rcvd;
2762 param->status = sidr_rep_msg->status;
2763 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2764 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2765 param->info = &sidr_rep_msg->info;
2766 param->info_len = sidr_rep_msg->info_length;
2767 work->cm_event.private_data = &sidr_rep_msg->private_data;
2770 static int cm_sidr_rep_handler(struct cm_work *work)
2772 struct cm_sidr_rep_msg *sidr_rep_msg;
2773 struct cm_id_private *cm_id_priv;
2774 unsigned long flags;
2776 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2777 work->mad_recv_wc->recv_buf.mad;
2778 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2780 return -EINVAL; /* Unmatched reply. */
2782 spin_lock_irqsave(&cm_id_priv->lock, flags);
2783 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2784 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2787 cm_id_priv->id.state = IB_CM_IDLE;
2788 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2789 (unsigned long) cm_id_priv->msg);
2790 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2792 cm_format_sidr_rep_event(work);
2793 cm_process_work(cm_id_priv, work);
2796 cm_deref_id(cm_id_priv);
2800 static void cm_process_send_error(struct ib_mad_send_buf *msg,
2801 enum ib_wc_status wc_status)
2803 struct cm_id_private *cm_id_priv;
2804 struct ib_cm_event cm_event;
2805 enum ib_cm_state state;
2806 unsigned long flags;
2809 memset(&cm_event, 0, sizeof cm_event);
2810 cm_id_priv = msg->context[0];
2812 /* Discard old sends or ones without a response. */
2813 spin_lock_irqsave(&cm_id_priv->lock, flags);
2814 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2815 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2819 case IB_CM_REQ_SENT:
2820 case IB_CM_MRA_REQ_RCVD:
2821 cm_reset_to_idle(cm_id_priv);
2822 cm_event.event = IB_CM_REQ_ERROR;
2824 case IB_CM_REP_SENT:
2825 case IB_CM_MRA_REP_RCVD:
2826 cm_reset_to_idle(cm_id_priv);
2827 cm_event.event = IB_CM_REP_ERROR;
2829 case IB_CM_DREQ_SENT:
2830 cm_enter_timewait(cm_id_priv);
2831 cm_event.event = IB_CM_DREQ_ERROR;
2833 case IB_CM_SIDR_REQ_SENT:
2834 cm_id_priv->id.state = IB_CM_IDLE;
2835 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2840 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2841 cm_event.param.send_status = wc_status;
2843 /* No other events can occur on the cm_id at this point. */
2844 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2847 ib_destroy_cm_id(&cm_id_priv->id);
2850 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2854 static void cm_send_handler(struct ib_mad_agent *mad_agent,
2855 struct ib_mad_send_wc *mad_send_wc)
2857 struct ib_mad_send_buf *msg;
2859 msg = (struct ib_mad_send_buf *)(unsigned long)mad_send_wc->wr_id;
2861 switch (mad_send_wc->status) {
2863 case IB_WC_WR_FLUSH_ERR:
2867 if (msg->context[0] && msg->context[1])
2868 cm_process_send_error(msg, mad_send_wc->status);
2875 static void cm_work_handler(void *data)
2877 struct cm_work *work = data;
2880 switch (work->cm_event.event) {
2881 case IB_CM_REQ_RECEIVED:
2882 ret = cm_req_handler(work);
2884 case IB_CM_MRA_RECEIVED:
2885 ret = cm_mra_handler(work);
2887 case IB_CM_REJ_RECEIVED:
2888 ret = cm_rej_handler(work);
2890 case IB_CM_REP_RECEIVED:
2891 ret = cm_rep_handler(work);
2893 case IB_CM_RTU_RECEIVED:
2894 ret = cm_rtu_handler(work);
2896 case IB_CM_USER_ESTABLISHED:
2897 ret = cm_establish_handler(work);
2899 case IB_CM_DREQ_RECEIVED:
2900 ret = cm_dreq_handler(work);
2902 case IB_CM_DREP_RECEIVED:
2903 ret = cm_drep_handler(work);
2905 case IB_CM_SIDR_REQ_RECEIVED:
2906 ret = cm_sidr_req_handler(work);
2908 case IB_CM_SIDR_REP_RECEIVED:
2909 ret = cm_sidr_rep_handler(work);
2911 case IB_CM_LAP_RECEIVED:
2912 ret = cm_lap_handler(work);
2914 case IB_CM_APR_RECEIVED:
2915 ret = cm_apr_handler(work);
2917 case IB_CM_TIMEWAIT_EXIT:
2918 ret = cm_timewait_handler(work);
2928 int ib_cm_establish(struct ib_cm_id *cm_id)
2930 struct cm_id_private *cm_id_priv;
2931 struct cm_work *work;
2932 unsigned long flags;
2935 work = kmalloc(sizeof *work, GFP_ATOMIC);
2939 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2940 spin_lock_irqsave(&cm_id_priv->lock, flags);
2941 switch (cm_id->state)
2943 case IB_CM_REP_SENT:
2944 case IB_CM_MRA_REP_RCVD:
2945 cm_id->state = IB_CM_ESTABLISHED;
2947 case IB_CM_ESTABLISHED:
2954 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2962 * The CM worker thread may try to destroy the cm_id before it
2963 * can execute this work item. To prevent potential deadlock,
2964 * we need to find the cm_id once we're in the context of the
2965 * worker thread, rather than holding a reference on it.
2967 INIT_WORK(&work->work, cm_work_handler, work);
2968 work->local_id = cm_id->local_id;
2969 work->remote_id = cm_id->remote_id;
2970 work->mad_recv_wc = NULL;
2971 work->cm_event.event = IB_CM_USER_ESTABLISHED;
2972 queue_work(cm.wq, &work->work);
2976 EXPORT_SYMBOL(ib_cm_establish);
2978 static void cm_recv_handler(struct ib_mad_agent *mad_agent,
2979 struct ib_mad_recv_wc *mad_recv_wc)
2981 struct cm_work *work;
2982 enum ib_cm_event_type event;
2985 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
2986 case CM_REQ_ATTR_ID:
2987 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
2988 alt_local_lid != 0);
2989 event = IB_CM_REQ_RECEIVED;
2991 case CM_MRA_ATTR_ID:
2992 event = IB_CM_MRA_RECEIVED;
2994 case CM_REJ_ATTR_ID:
2995 event = IB_CM_REJ_RECEIVED;
2997 case CM_REP_ATTR_ID:
2998 event = IB_CM_REP_RECEIVED;
3000 case CM_RTU_ATTR_ID:
3001 event = IB_CM_RTU_RECEIVED;
3003 case CM_DREQ_ATTR_ID:
3004 event = IB_CM_DREQ_RECEIVED;
3006 case CM_DREP_ATTR_ID:
3007 event = IB_CM_DREP_RECEIVED;
3009 case CM_SIDR_REQ_ATTR_ID:
3010 event = IB_CM_SIDR_REQ_RECEIVED;
3012 case CM_SIDR_REP_ATTR_ID:
3013 event = IB_CM_SIDR_REP_RECEIVED;
3015 case CM_LAP_ATTR_ID:
3017 event = IB_CM_LAP_RECEIVED;
3019 case CM_APR_ATTR_ID:
3020 event = IB_CM_APR_RECEIVED;
3023 ib_free_recv_mad(mad_recv_wc);
3027 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3030 ib_free_recv_mad(mad_recv_wc);
3034 INIT_WORK(&work->work, cm_work_handler, work);
3035 work->cm_event.event = event;
3036 work->mad_recv_wc = mad_recv_wc;
3037 work->port = (struct cm_port *)mad_agent->context;
3038 queue_work(cm.wq, &work->work);
3041 static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3042 struct ib_qp_attr *qp_attr,
3045 unsigned long flags;
3048 spin_lock_irqsave(&cm_id_priv->lock, flags);
3049 switch (cm_id_priv->id.state) {
3050 case IB_CM_REQ_SENT:
3051 case IB_CM_MRA_REQ_RCVD:
3052 case IB_CM_REQ_RCVD:
3053 case IB_CM_MRA_REQ_SENT:
3054 case IB_CM_REP_RCVD:
3055 case IB_CM_MRA_REP_SENT:
3056 case IB_CM_REP_SENT:
3057 case IB_CM_MRA_REP_RCVD:
3058 case IB_CM_ESTABLISHED:
3059 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3060 IB_QP_PKEY_INDEX | IB_QP_PORT;
3061 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE;
3062 if (cm_id_priv->responder_resources)
3063 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_WRITE |
3064 IB_ACCESS_REMOTE_READ;
3065 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3066 qp_attr->port_num = cm_id_priv->av.port->port_num;
3073 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3077 static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3078 struct ib_qp_attr *qp_attr,
3081 unsigned long flags;
3084 spin_lock_irqsave(&cm_id_priv->lock, flags);
3085 switch (cm_id_priv->id.state) {
3086 case IB_CM_REQ_RCVD:
3087 case IB_CM_MRA_REQ_SENT:
3088 case IB_CM_REP_RCVD:
3089 case IB_CM_MRA_REP_SENT:
3090 case IB_CM_REP_SENT:
3091 case IB_CM_MRA_REP_RCVD:
3092 case IB_CM_ESTABLISHED:
3093 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
3094 IB_QP_DEST_QPN | IB_QP_RQ_PSN |
3095 IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER;
3096 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3097 qp_attr->path_mtu = cm_id_priv->path_mtu;
3098 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3099 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
3100 qp_attr->max_dest_rd_atomic = cm_id_priv->responder_resources;
3101 qp_attr->min_rnr_timer = 0;
3102 if (cm_id_priv->alt_av.ah_attr.dlid) {
3103 *qp_attr_mask |= IB_QP_ALT_PATH;
3104 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3112 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3116 static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3117 struct ib_qp_attr *qp_attr,
3120 unsigned long flags;
3123 spin_lock_irqsave(&cm_id_priv->lock, flags);
3124 switch (cm_id_priv->id.state) {
3125 case IB_CM_REP_RCVD:
3126 case IB_CM_MRA_REP_SENT:
3127 case IB_CM_REP_SENT:
3128 case IB_CM_MRA_REP_RCVD:
3129 case IB_CM_ESTABLISHED:
3130 *qp_attr_mask = IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3131 IB_QP_RNR_RETRY | IB_QP_SQ_PSN |
3132 IB_QP_MAX_QP_RD_ATOMIC;
3133 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3134 qp_attr->retry_cnt = cm_id_priv->retry_count;
3135 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3136 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
3137 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3138 if (cm_id_priv->alt_av.ah_attr.dlid) {
3139 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3140 qp_attr->path_mig_state = IB_MIG_REARM;
3148 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3152 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3153 struct ib_qp_attr *qp_attr,
3156 struct cm_id_private *cm_id_priv;
3159 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3160 switch (qp_attr->qp_state) {
3162 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3165 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3168 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3176 EXPORT_SYMBOL(ib_cm_init_qp_attr);
3178 static u64 cm_get_ca_guid(struct ib_device *device)
3180 struct ib_device_attr *device_attr;
3184 device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
3188 ret = ib_query_device(device, device_attr);
3189 guid = ret ? 0 : device_attr->node_guid;
3194 static void cm_add_one(struct ib_device *device)
3196 struct cm_device *cm_dev;
3197 struct cm_port *port;
3198 struct ib_mad_reg_req reg_req = {
3199 .mgmt_class = IB_MGMT_CLASS_CM,
3200 .mgmt_class_version = IB_CM_CLASS_VERSION
3202 struct ib_port_modify port_modify = {
3203 .set_port_cap_mask = IB_PORT_CM_SUP
3205 unsigned long flags;
3209 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3210 device->phys_port_cnt, GFP_KERNEL);
3214 cm_dev->device = device;
3215 cm_dev->ca_guid = cm_get_ca_guid(device);
3216 if (!cm_dev->ca_guid)
3219 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3220 for (i = 1; i <= device->phys_port_cnt; i++) {
3221 port = &cm_dev->port[i-1];
3222 port->cm_dev = cm_dev;
3224 port->mad_agent = ib_register_mad_agent(device, i,
3231 if (IS_ERR(port->mad_agent))
3234 ret = ib_modify_port(device, i, 0, &port_modify);
3238 ib_set_client_data(device, &cm_client, cm_dev);
3240 write_lock_irqsave(&cm.device_lock, flags);
3241 list_add_tail(&cm_dev->list, &cm.device_list);
3242 write_unlock_irqrestore(&cm.device_lock, flags);
3246 ib_unregister_mad_agent(port->mad_agent);
3248 port_modify.set_port_cap_mask = 0;
3249 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3251 port = &cm_dev->port[i-1];
3252 ib_modify_port(device, port->port_num, 0, &port_modify);
3253 ib_unregister_mad_agent(port->mad_agent);
3259 static void cm_remove_one(struct ib_device *device)
3261 struct cm_device *cm_dev;
3262 struct cm_port *port;
3263 struct ib_port_modify port_modify = {
3264 .clr_port_cap_mask = IB_PORT_CM_SUP
3266 unsigned long flags;
3269 cm_dev = ib_get_client_data(device, &cm_client);
3273 write_lock_irqsave(&cm.device_lock, flags);
3274 list_del(&cm_dev->list);
3275 write_unlock_irqrestore(&cm.device_lock, flags);
3277 for (i = 1; i <= device->phys_port_cnt; i++) {
3278 port = &cm_dev->port[i-1];
3279 ib_modify_port(device, port->port_num, 0, &port_modify);
3280 ib_unregister_mad_agent(port->mad_agent);
3285 static int __init ib_cm_init(void)
3289 memset(&cm, 0, sizeof cm);
3290 INIT_LIST_HEAD(&cm.device_list);
3291 rwlock_init(&cm.device_lock);
3292 spin_lock_init(&cm.lock);
3293 cm.listen_service_table = RB_ROOT;
3294 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3295 cm.remote_id_table = RB_ROOT;
3296 cm.remote_qp_table = RB_ROOT;
3297 cm.remote_sidr_table = RB_ROOT;
3298 idr_init(&cm.local_id_table);
3299 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3301 cm.wq = create_workqueue("ib_cm");
3305 ret = ib_register_client(&cm_client);
3311 destroy_workqueue(cm.wq);
3315 static void __exit ib_cm_cleanup(void)
3317 flush_workqueue(cm.wq);
3318 destroy_workqueue(cm.wq);
3319 ib_unregister_client(&cm_client);
3322 module_init(ib_cm_init);
3323 module_exit(ib_cm_cleanup);