2 * Copyright (c) 2004-2007 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
36 #include <linux/completion.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/device.h>
39 #include <linux/module.h>
40 #include <linux/err.h>
41 #include <linux/idr.h>
42 #include <linux/interrupt.h>
43 #include <linux/random.h>
44 #include <linux/rbtree.h>
45 #include <linux/spinlock.h>
46 #include <linux/slab.h>
47 #include <linux/sysfs.h>
48 #include <linux/workqueue.h>
49 #include <linux/kdev_t.h>
50 #include <linux/etherdevice.h>
52 #include <rdma/ib_cache.h>
53 #include <rdma/ib_cm.h>
56 MODULE_AUTHOR("Sean Hefty");
57 MODULE_DESCRIPTION("InfiniBand CM");
58 MODULE_LICENSE("Dual BSD/GPL");
60 static void cm_add_one(struct ib_device *device);
61 static void cm_remove_one(struct ib_device *device);
63 static struct ib_client cm_client = {
66 .remove = cm_remove_one
71 struct list_head device_list;
73 struct rb_root listen_service_table;
74 u64 listen_service_id;
75 /* struct rb_root peer_service_table; todo: fix peer to peer */
76 struct rb_root remote_qp_table;
77 struct rb_root remote_id_table;
78 struct rb_root remote_sidr_table;
79 struct idr local_id_table;
80 __be32 random_id_operand;
81 struct list_head timewait_list;
82 struct workqueue_struct *wq;
85 /* Counter indexes ordered by attribute ID */
99 CM_ATTR_ID_OFFSET = 0x0010,
110 static char const counter_group_names[CM_COUNTER_GROUPS]
111 [sizeof("cm_rx_duplicates")] = {
112 "cm_tx_msgs", "cm_tx_retries",
113 "cm_rx_msgs", "cm_rx_duplicates"
116 struct cm_counter_group {
118 atomic_long_t counter[CM_ATTR_COUNT];
121 struct cm_counter_attribute {
122 struct attribute attr;
126 #define CM_COUNTER_ATTR(_name, _index) \
127 struct cm_counter_attribute cm_##_name##_counter_attr = { \
128 .attr = { .name = __stringify(_name), .mode = 0444 }, \
132 static CM_COUNTER_ATTR(req, CM_REQ_COUNTER);
133 static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER);
134 static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER);
135 static CM_COUNTER_ATTR(rep, CM_REP_COUNTER);
136 static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER);
137 static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER);
138 static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER);
139 static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER);
140 static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER);
141 static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER);
142 static CM_COUNTER_ATTR(apr, CM_APR_COUNTER);
144 static struct attribute *cm_counter_default_attrs[] = {
145 &cm_req_counter_attr.attr,
146 &cm_mra_counter_attr.attr,
147 &cm_rej_counter_attr.attr,
148 &cm_rep_counter_attr.attr,
149 &cm_rtu_counter_attr.attr,
150 &cm_dreq_counter_attr.attr,
151 &cm_drep_counter_attr.attr,
152 &cm_sidr_req_counter_attr.attr,
153 &cm_sidr_rep_counter_attr.attr,
154 &cm_lap_counter_attr.attr,
155 &cm_apr_counter_attr.attr,
160 struct cm_device *cm_dev;
161 struct ib_mad_agent *mad_agent;
162 struct kobject port_obj;
164 struct cm_counter_group counter_group[CM_COUNTER_GROUPS];
168 struct list_head list;
169 struct ib_device *ib_device;
170 struct device *device;
172 struct cm_port *port[0];
176 struct cm_port *port;
178 struct ib_ah_attr ah_attr;
186 struct delayed_work work;
187 struct list_head list;
188 struct cm_port *port;
189 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
190 __be32 local_id; /* Established / timewait */
192 struct ib_cm_event cm_event;
193 struct ib_sa_path_rec path[0];
196 struct cm_timewait_info {
197 struct cm_work work; /* Must be first. */
198 struct list_head list;
199 struct rb_node remote_qp_node;
200 struct rb_node remote_id_node;
201 __be64 remote_ca_guid;
203 u8 inserted_remote_qp;
204 u8 inserted_remote_id;
207 struct cm_id_private {
210 struct rb_node service_node;
211 struct rb_node sidr_id_node;
212 spinlock_t lock; /* Do not acquire inside cm.lock */
213 struct completion comp;
216 struct ib_mad_send_buf *msg;
217 struct cm_timewait_info *timewait_info;
218 /* todo: use alternate port on send failure */
221 struct ib_cm_compare_data *compare_data;
227 enum ib_qp_type qp_type;
231 enum ib_mtu path_mtu;
236 u8 responder_resources;
243 struct list_head work_list;
247 static void cm_work_handler(struct work_struct *work);
249 static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
251 if (atomic_dec_and_test(&cm_id_priv->refcount))
252 complete(&cm_id_priv->comp);
255 static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
256 struct ib_mad_send_buf **msg)
258 struct ib_mad_agent *mad_agent;
259 struct ib_mad_send_buf *m;
262 mad_agent = cm_id_priv->av.port->mad_agent;
263 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
267 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
268 cm_id_priv->av.pkey_index,
269 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
276 /* Timeout set by caller if response is expected. */
278 m->retries = cm_id_priv->max_cm_retries;
280 atomic_inc(&cm_id_priv->refcount);
281 m->context[0] = cm_id_priv;
286 static int cm_alloc_response_msg(struct cm_port *port,
287 struct ib_mad_recv_wc *mad_recv_wc,
288 struct ib_mad_send_buf **msg)
290 struct ib_mad_send_buf *m;
293 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
294 mad_recv_wc->recv_buf.grh, port->port_num);
298 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
299 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
310 static void cm_free_msg(struct ib_mad_send_buf *msg)
312 ib_destroy_ah(msg->ah);
314 cm_deref_id(msg->context[0]);
315 ib_free_send_mad(msg);
318 static void * cm_copy_private_data(const void *private_data,
323 if (!private_data || !private_data_len)
326 data = kmemdup(private_data, private_data_len, GFP_KERNEL);
328 return ERR_PTR(-ENOMEM);
333 static void cm_set_private_data(struct cm_id_private *cm_id_priv,
334 void *private_data, u8 private_data_len)
336 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
337 kfree(cm_id_priv->private_data);
339 cm_id_priv->private_data = private_data;
340 cm_id_priv->private_data_len = private_data_len;
343 static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
344 struct ib_grh *grh, struct cm_av *av)
347 av->pkey_index = wc->pkey_index;
348 ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc,
352 static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
354 struct cm_device *cm_dev;
355 struct cm_port *port = NULL;
360 read_lock_irqsave(&cm.device_lock, flags);
361 list_for_each_entry(cm_dev, &cm.device_list, list) {
362 if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid,
364 port = cm_dev->port[p-1];
368 read_unlock_irqrestore(&cm.device_lock, flags);
373 ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num,
374 be16_to_cpu(path->pkey), &av->pkey_index);
379 ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path,
381 av->timeout = path->packet_life_time + 1;
382 memcpy(av->smac, path->smac, sizeof(av->smac));
388 static int cm_alloc_id(struct cm_id_private *cm_id_priv)
393 idr_preload(GFP_KERNEL);
394 spin_lock_irqsave(&cm.lock, flags);
396 id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT);
398 spin_unlock_irqrestore(&cm.lock, flags);
401 cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
402 return id < 0 ? id : 0;
405 static void cm_free_id(__be32 local_id)
407 spin_lock_irq(&cm.lock);
408 idr_remove(&cm.local_id_table,
409 (__force int) (local_id ^ cm.random_id_operand));
410 spin_unlock_irq(&cm.lock);
413 static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
415 struct cm_id_private *cm_id_priv;
417 cm_id_priv = idr_find(&cm.local_id_table,
418 (__force int) (local_id ^ cm.random_id_operand));
420 if (cm_id_priv->id.remote_id == remote_id)
421 atomic_inc(&cm_id_priv->refcount);
429 static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
431 struct cm_id_private *cm_id_priv;
433 spin_lock_irq(&cm.lock);
434 cm_id_priv = cm_get_id(local_id, remote_id);
435 spin_unlock_irq(&cm.lock);
440 static void cm_mask_copy(u32 *dst, const u32 *src, const u32 *mask)
444 for (i = 0; i < IB_CM_COMPARE_SIZE; i++)
445 dst[i] = src[i] & mask[i];
448 static int cm_compare_data(struct ib_cm_compare_data *src_data,
449 struct ib_cm_compare_data *dst_data)
451 u32 src[IB_CM_COMPARE_SIZE];
452 u32 dst[IB_CM_COMPARE_SIZE];
454 if (!src_data || !dst_data)
457 cm_mask_copy(src, src_data->data, dst_data->mask);
458 cm_mask_copy(dst, dst_data->data, src_data->mask);
459 return memcmp(src, dst, sizeof(src));
462 static int cm_compare_private_data(u32 *private_data,
463 struct ib_cm_compare_data *dst_data)
465 u32 src[IB_CM_COMPARE_SIZE];
470 cm_mask_copy(src, private_data, dst_data->mask);
471 return memcmp(src, dst_data->data, sizeof(src));
475 * Trivial helpers to strip endian annotation and compare; the
476 * endianness doesn't actually matter since we just need a stable
477 * order for the RB tree.
479 static int be32_lt(__be32 a, __be32 b)
481 return (__force u32) a < (__force u32) b;
484 static int be32_gt(__be32 a, __be32 b)
486 return (__force u32) a > (__force u32) b;
489 static int be64_lt(__be64 a, __be64 b)
491 return (__force u64) a < (__force u64) b;
494 static int be64_gt(__be64 a, __be64 b)
496 return (__force u64) a > (__force u64) b;
499 static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
501 struct rb_node **link = &cm.listen_service_table.rb_node;
502 struct rb_node *parent = NULL;
503 struct cm_id_private *cur_cm_id_priv;
504 __be64 service_id = cm_id_priv->id.service_id;
505 __be64 service_mask = cm_id_priv->id.service_mask;
510 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
512 data_cmp = cm_compare_data(cm_id_priv->compare_data,
513 cur_cm_id_priv->compare_data);
514 if ((cur_cm_id_priv->id.service_mask & service_id) ==
515 (service_mask & cur_cm_id_priv->id.service_id) &&
516 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
518 return cur_cm_id_priv;
520 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
521 link = &(*link)->rb_left;
522 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
523 link = &(*link)->rb_right;
524 else if (be64_lt(service_id, cur_cm_id_priv->id.service_id))
525 link = &(*link)->rb_left;
526 else if (be64_gt(service_id, cur_cm_id_priv->id.service_id))
527 link = &(*link)->rb_right;
528 else if (data_cmp < 0)
529 link = &(*link)->rb_left;
531 link = &(*link)->rb_right;
533 rb_link_node(&cm_id_priv->service_node, parent, link);
534 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
538 static struct cm_id_private * cm_find_listen(struct ib_device *device,
542 struct rb_node *node = cm.listen_service_table.rb_node;
543 struct cm_id_private *cm_id_priv;
547 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
548 data_cmp = cm_compare_private_data(private_data,
549 cm_id_priv->compare_data);
550 if ((cm_id_priv->id.service_mask & service_id) ==
551 cm_id_priv->id.service_id &&
552 (cm_id_priv->id.device == device) && !data_cmp)
555 if (device < cm_id_priv->id.device)
556 node = node->rb_left;
557 else if (device > cm_id_priv->id.device)
558 node = node->rb_right;
559 else if (be64_lt(service_id, cm_id_priv->id.service_id))
560 node = node->rb_left;
561 else if (be64_gt(service_id, cm_id_priv->id.service_id))
562 node = node->rb_right;
563 else if (data_cmp < 0)
564 node = node->rb_left;
566 node = node->rb_right;
571 static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
574 struct rb_node **link = &cm.remote_id_table.rb_node;
575 struct rb_node *parent = NULL;
576 struct cm_timewait_info *cur_timewait_info;
577 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
578 __be32 remote_id = timewait_info->work.remote_id;
582 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
584 if (be32_lt(remote_id, cur_timewait_info->work.remote_id))
585 link = &(*link)->rb_left;
586 else if (be32_gt(remote_id, cur_timewait_info->work.remote_id))
587 link = &(*link)->rb_right;
588 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
589 link = &(*link)->rb_left;
590 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
591 link = &(*link)->rb_right;
593 return cur_timewait_info;
595 timewait_info->inserted_remote_id = 1;
596 rb_link_node(&timewait_info->remote_id_node, parent, link);
597 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
601 static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
604 struct rb_node *node = cm.remote_id_table.rb_node;
605 struct cm_timewait_info *timewait_info;
608 timewait_info = rb_entry(node, struct cm_timewait_info,
610 if (be32_lt(remote_id, timewait_info->work.remote_id))
611 node = node->rb_left;
612 else if (be32_gt(remote_id, timewait_info->work.remote_id))
613 node = node->rb_right;
614 else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid))
615 node = node->rb_left;
616 else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid))
617 node = node->rb_right;
619 return timewait_info;
624 static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
627 struct rb_node **link = &cm.remote_qp_table.rb_node;
628 struct rb_node *parent = NULL;
629 struct cm_timewait_info *cur_timewait_info;
630 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
631 __be32 remote_qpn = timewait_info->remote_qpn;
635 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
637 if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn))
638 link = &(*link)->rb_left;
639 else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn))
640 link = &(*link)->rb_right;
641 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
642 link = &(*link)->rb_left;
643 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
644 link = &(*link)->rb_right;
646 return cur_timewait_info;
648 timewait_info->inserted_remote_qp = 1;
649 rb_link_node(&timewait_info->remote_qp_node, parent, link);
650 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
654 static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
657 struct rb_node **link = &cm.remote_sidr_table.rb_node;
658 struct rb_node *parent = NULL;
659 struct cm_id_private *cur_cm_id_priv;
660 union ib_gid *port_gid = &cm_id_priv->av.dgid;
661 __be32 remote_id = cm_id_priv->id.remote_id;
665 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
667 if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id))
668 link = &(*link)->rb_left;
669 else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id))
670 link = &(*link)->rb_right;
673 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
676 link = &(*link)->rb_left;
678 link = &(*link)->rb_right;
680 return cur_cm_id_priv;
683 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
684 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
688 static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
689 enum ib_cm_sidr_status status)
691 struct ib_cm_sidr_rep_param param;
693 memset(¶m, 0, sizeof param);
694 param.status = status;
695 ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m);
698 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
699 ib_cm_handler cm_handler,
702 struct cm_id_private *cm_id_priv;
705 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
707 return ERR_PTR(-ENOMEM);
709 cm_id_priv->id.state = IB_CM_IDLE;
710 cm_id_priv->id.device = device;
711 cm_id_priv->id.cm_handler = cm_handler;
712 cm_id_priv->id.context = context;
713 cm_id_priv->id.remote_cm_qpn = 1;
714 ret = cm_alloc_id(cm_id_priv);
718 spin_lock_init(&cm_id_priv->lock);
719 init_completion(&cm_id_priv->comp);
720 INIT_LIST_HEAD(&cm_id_priv->work_list);
721 atomic_set(&cm_id_priv->work_count, -1);
722 atomic_set(&cm_id_priv->refcount, 1);
723 return &cm_id_priv->id;
727 return ERR_PTR(-ENOMEM);
729 EXPORT_SYMBOL(ib_create_cm_id);
731 static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
733 struct cm_work *work;
735 if (list_empty(&cm_id_priv->work_list))
738 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
739 list_del(&work->list);
743 static void cm_free_work(struct cm_work *work)
745 if (work->mad_recv_wc)
746 ib_free_recv_mad(work->mad_recv_wc);
750 static inline int cm_convert_to_ms(int iba_time)
752 /* approximate conversion to ms from 4.096us x 2^iba_time */
753 return 1 << max(iba_time - 8, 0);
757 * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
758 * Because of how ack_timeout is stored, adding one doubles the timeout.
759 * To avoid large timeouts, select the max(ack_delay, life_time + 1), and
760 * increment it (round up) only if the other is within 50%.
762 static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time)
764 int ack_timeout = packet_life_time + 1;
766 if (ack_timeout >= ca_ack_delay)
767 ack_timeout += (ca_ack_delay >= (ack_timeout - 1));
769 ack_timeout = ca_ack_delay +
770 (ack_timeout >= (ca_ack_delay - 1));
772 return min(31, ack_timeout);
775 static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
777 if (timewait_info->inserted_remote_id) {
778 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
779 timewait_info->inserted_remote_id = 0;
782 if (timewait_info->inserted_remote_qp) {
783 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
784 timewait_info->inserted_remote_qp = 0;
788 static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
790 struct cm_timewait_info *timewait_info;
792 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
794 return ERR_PTR(-ENOMEM);
796 timewait_info->work.local_id = local_id;
797 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
798 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
799 return timewait_info;
802 static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
807 spin_lock_irqsave(&cm.lock, flags);
808 cm_cleanup_timewait(cm_id_priv->timewait_info);
809 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
810 spin_unlock_irqrestore(&cm.lock, flags);
813 * The cm_id could be destroyed by the user before we exit timewait.
814 * To protect against this, we search for the cm_id after exiting
815 * timewait before notifying the user that we've exited timewait.
817 cm_id_priv->id.state = IB_CM_TIMEWAIT;
818 wait_time = cm_convert_to_ms(cm_id_priv->av.timeout);
819 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
820 msecs_to_jiffies(wait_time));
821 cm_id_priv->timewait_info = NULL;
824 static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
828 cm_id_priv->id.state = IB_CM_IDLE;
829 if (cm_id_priv->timewait_info) {
830 spin_lock_irqsave(&cm.lock, flags);
831 cm_cleanup_timewait(cm_id_priv->timewait_info);
832 spin_unlock_irqrestore(&cm.lock, flags);
833 kfree(cm_id_priv->timewait_info);
834 cm_id_priv->timewait_info = NULL;
838 static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
840 struct cm_id_private *cm_id_priv;
841 struct cm_work *work;
843 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
845 spin_lock_irq(&cm_id_priv->lock);
846 switch (cm_id->state) {
848 cm_id->state = IB_CM_IDLE;
849 spin_unlock_irq(&cm_id_priv->lock);
850 spin_lock_irq(&cm.lock);
851 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
852 spin_unlock_irq(&cm.lock);
854 case IB_CM_SIDR_REQ_SENT:
855 cm_id->state = IB_CM_IDLE;
856 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
857 spin_unlock_irq(&cm_id_priv->lock);
859 case IB_CM_SIDR_REQ_RCVD:
860 spin_unlock_irq(&cm_id_priv->lock);
861 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
864 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
865 spin_unlock_irq(&cm_id_priv->lock);
866 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
867 &cm_id_priv->id.device->node_guid,
868 sizeof cm_id_priv->id.device->node_guid,
872 if (err == -ENOMEM) {
873 /* Do not reject to allow future retries. */
874 cm_reset_to_idle(cm_id_priv);
875 spin_unlock_irq(&cm_id_priv->lock);
877 spin_unlock_irq(&cm_id_priv->lock);
878 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
882 case IB_CM_MRA_REQ_RCVD:
884 case IB_CM_MRA_REP_RCVD:
885 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
887 case IB_CM_MRA_REQ_SENT:
889 case IB_CM_MRA_REP_SENT:
890 spin_unlock_irq(&cm_id_priv->lock);
891 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
894 case IB_CM_ESTABLISHED:
895 spin_unlock_irq(&cm_id_priv->lock);
896 if (cm_id_priv->qp_type == IB_QPT_XRC_TGT)
898 ib_send_cm_dreq(cm_id, NULL, 0);
900 case IB_CM_DREQ_SENT:
901 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
902 cm_enter_timewait(cm_id_priv);
903 spin_unlock_irq(&cm_id_priv->lock);
905 case IB_CM_DREQ_RCVD:
906 spin_unlock_irq(&cm_id_priv->lock);
907 ib_send_cm_drep(cm_id, NULL, 0);
910 spin_unlock_irq(&cm_id_priv->lock);
914 cm_free_id(cm_id->local_id);
915 cm_deref_id(cm_id_priv);
916 wait_for_completion(&cm_id_priv->comp);
917 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
919 kfree(cm_id_priv->compare_data);
920 kfree(cm_id_priv->private_data);
924 void ib_destroy_cm_id(struct ib_cm_id *cm_id)
926 cm_destroy_id(cm_id, 0);
928 EXPORT_SYMBOL(ib_destroy_cm_id);
930 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
931 struct ib_cm_compare_data *compare_data)
933 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
937 service_mask = service_mask ? service_mask : ~cpu_to_be64(0);
938 service_id &= service_mask;
939 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
940 (service_id != IB_CM_ASSIGN_SERVICE_ID))
943 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
944 if (cm_id->state != IB_CM_IDLE)
948 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
950 if (!cm_id_priv->compare_data)
952 cm_mask_copy(cm_id_priv->compare_data->data,
953 compare_data->data, compare_data->mask);
954 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
955 sizeof(compare_data->mask));
958 cm_id->state = IB_CM_LISTEN;
960 spin_lock_irqsave(&cm.lock, flags);
961 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
962 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
963 cm_id->service_mask = ~cpu_to_be64(0);
965 cm_id->service_id = service_id;
966 cm_id->service_mask = service_mask;
968 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
969 spin_unlock_irqrestore(&cm.lock, flags);
971 if (cur_cm_id_priv) {
972 cm_id->state = IB_CM_IDLE;
973 kfree(cm_id_priv->compare_data);
974 cm_id_priv->compare_data = NULL;
979 EXPORT_SYMBOL(ib_cm_listen);
981 static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
982 enum cm_msg_sequence msg_seq)
986 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
987 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
989 return cpu_to_be64(hi_tid | low_tid);
992 static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
993 __be16 attr_id, __be64 tid)
995 hdr->base_version = IB_MGMT_BASE_VERSION;
996 hdr->mgmt_class = IB_MGMT_CLASS_CM;
997 hdr->class_version = IB_CM_CLASS_VERSION;
998 hdr->method = IB_MGMT_METHOD_SEND;
999 hdr->attr_id = attr_id;
1003 static void cm_format_req(struct cm_req_msg *req_msg,
1004 struct cm_id_private *cm_id_priv,
1005 struct ib_cm_req_param *param)
1007 struct ib_sa_path_rec *pri_path = param->primary_path;
1008 struct ib_sa_path_rec *alt_path = param->alternate_path;
1010 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
1011 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
1013 req_msg->local_comm_id = cm_id_priv->id.local_id;
1014 req_msg->service_id = param->service_id;
1015 req_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
1016 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
1017 cm_req_set_init_depth(req_msg, param->initiator_depth);
1018 cm_req_set_remote_resp_timeout(req_msg,
1019 param->remote_cm_response_timeout);
1020 cm_req_set_qp_type(req_msg, param->qp_type);
1021 cm_req_set_flow_ctrl(req_msg, param->flow_control);
1022 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
1023 cm_req_set_local_resp_timeout(req_msg,
1024 param->local_cm_response_timeout);
1025 req_msg->pkey = param->primary_path->pkey;
1026 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
1027 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
1029 if (param->qp_type != IB_QPT_XRC_INI) {
1030 cm_req_set_resp_res(req_msg, param->responder_resources);
1031 cm_req_set_retry_count(req_msg, param->retry_count);
1032 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
1033 cm_req_set_srq(req_msg, param->srq);
1036 if (pri_path->hop_limit <= 1) {
1037 req_msg->primary_local_lid = pri_path->slid;
1038 req_msg->primary_remote_lid = pri_path->dlid;
1040 /* Work-around until there's a way to obtain remote LID info */
1041 req_msg->primary_local_lid = IB_LID_PERMISSIVE;
1042 req_msg->primary_remote_lid = IB_LID_PERMISSIVE;
1044 req_msg->primary_local_gid = pri_path->sgid;
1045 req_msg->primary_remote_gid = pri_path->dgid;
1046 cm_req_set_primary_flow_label(req_msg, pri_path->flow_label);
1047 cm_req_set_primary_packet_rate(req_msg, pri_path->rate);
1048 req_msg->primary_traffic_class = pri_path->traffic_class;
1049 req_msg->primary_hop_limit = pri_path->hop_limit;
1050 cm_req_set_primary_sl(req_msg, pri_path->sl);
1051 cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1));
1052 cm_req_set_primary_local_ack_timeout(req_msg,
1053 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
1054 pri_path->packet_life_time));
1057 if (alt_path->hop_limit <= 1) {
1058 req_msg->alt_local_lid = alt_path->slid;
1059 req_msg->alt_remote_lid = alt_path->dlid;
1061 req_msg->alt_local_lid = IB_LID_PERMISSIVE;
1062 req_msg->alt_remote_lid = IB_LID_PERMISSIVE;
1064 req_msg->alt_local_gid = alt_path->sgid;
1065 req_msg->alt_remote_gid = alt_path->dgid;
1066 cm_req_set_alt_flow_label(req_msg,
1067 alt_path->flow_label);
1068 cm_req_set_alt_packet_rate(req_msg, alt_path->rate);
1069 req_msg->alt_traffic_class = alt_path->traffic_class;
1070 req_msg->alt_hop_limit = alt_path->hop_limit;
1071 cm_req_set_alt_sl(req_msg, alt_path->sl);
1072 cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1));
1073 cm_req_set_alt_local_ack_timeout(req_msg,
1074 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
1075 alt_path->packet_life_time));
1078 if (param->private_data && param->private_data_len)
1079 memcpy(req_msg->private_data, param->private_data,
1080 param->private_data_len);
1083 static int cm_validate_req_param(struct ib_cm_req_param *param)
1085 /* peer-to-peer not supported */
1086 if (param->peer_to_peer)
1089 if (!param->primary_path)
1092 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC &&
1093 param->qp_type != IB_QPT_XRC_INI)
1096 if (param->private_data &&
1097 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
1100 if (param->alternate_path &&
1101 (param->alternate_path->pkey != param->primary_path->pkey ||
1102 param->alternate_path->mtu != param->primary_path->mtu))
1108 int ib_send_cm_req(struct ib_cm_id *cm_id,
1109 struct ib_cm_req_param *param)
1111 struct cm_id_private *cm_id_priv;
1112 struct cm_req_msg *req_msg;
1113 unsigned long flags;
1116 ret = cm_validate_req_param(param);
1120 /* Verify that we're not in timewait. */
1121 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1122 spin_lock_irqsave(&cm_id_priv->lock, flags);
1123 if (cm_id->state != IB_CM_IDLE) {
1124 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1128 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1130 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1132 if (IS_ERR(cm_id_priv->timewait_info)) {
1133 ret = PTR_ERR(cm_id_priv->timewait_info);
1137 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
1140 if (param->alternate_path) {
1141 ret = cm_init_av_by_path(param->alternate_path,
1142 &cm_id_priv->alt_av);
1146 cm_id->service_id = param->service_id;
1147 cm_id->service_mask = ~cpu_to_be64(0);
1148 cm_id_priv->timeout_ms = cm_convert_to_ms(
1149 param->primary_path->packet_life_time) * 2 +
1151 param->remote_cm_response_timeout);
1152 cm_id_priv->max_cm_retries = param->max_cm_retries;
1153 cm_id_priv->initiator_depth = param->initiator_depth;
1154 cm_id_priv->responder_resources = param->responder_resources;
1155 cm_id_priv->retry_count = param->retry_count;
1156 cm_id_priv->path_mtu = param->primary_path->mtu;
1157 cm_id_priv->pkey = param->primary_path->pkey;
1158 cm_id_priv->qp_type = param->qp_type;
1160 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1164 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1165 cm_format_req(req_msg, cm_id_priv, param);
1166 cm_id_priv->tid = req_msg->hdr.tid;
1167 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
1168 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1170 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1171 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
1173 spin_lock_irqsave(&cm_id_priv->lock, flags);
1174 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
1176 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1179 BUG_ON(cm_id->state != IB_CM_IDLE);
1180 cm_id->state = IB_CM_REQ_SENT;
1181 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1184 error2: cm_free_msg(cm_id_priv->msg);
1185 error1: kfree(cm_id_priv->timewait_info);
1188 EXPORT_SYMBOL(ib_send_cm_req);
1190 static int cm_issue_rej(struct cm_port *port,
1191 struct ib_mad_recv_wc *mad_recv_wc,
1192 enum ib_cm_rej_reason reason,
1193 enum cm_msg_response msg_rejected,
1194 void *ari, u8 ari_length)
1196 struct ib_mad_send_buf *msg = NULL;
1197 struct cm_rej_msg *rej_msg, *rcv_msg;
1200 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1204 /* We just need common CM header information. Cast to any message. */
1205 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1206 rej_msg = (struct cm_rej_msg *) msg->mad;
1208 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1209 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1210 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1211 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
1212 rej_msg->reason = cpu_to_be16(reason);
1214 if (ari && ari_length) {
1215 cm_rej_set_reject_info_len(rej_msg, ari_length);
1216 memcpy(rej_msg->ari, ari, ari_length);
1219 ret = ib_post_send_mad(msg, NULL);
1226 static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1227 __be32 local_qpn, __be32 remote_qpn)
1229 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1230 ((local_ca_guid == remote_ca_guid) &&
1231 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1234 static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
1235 struct ib_sa_path_rec *primary_path,
1236 struct ib_sa_path_rec *alt_path)
1238 memset(primary_path, 0, sizeof *primary_path);
1239 primary_path->dgid = req_msg->primary_local_gid;
1240 primary_path->sgid = req_msg->primary_remote_gid;
1241 primary_path->dlid = req_msg->primary_local_lid;
1242 primary_path->slid = req_msg->primary_remote_lid;
1243 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1244 primary_path->hop_limit = req_msg->primary_hop_limit;
1245 primary_path->traffic_class = req_msg->primary_traffic_class;
1246 primary_path->reversible = 1;
1247 primary_path->pkey = req_msg->pkey;
1248 primary_path->sl = cm_req_get_primary_sl(req_msg);
1249 primary_path->mtu_selector = IB_SA_EQ;
1250 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1251 primary_path->rate_selector = IB_SA_EQ;
1252 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1253 primary_path->packet_life_time_selector = IB_SA_EQ;
1254 primary_path->packet_life_time =
1255 cm_req_get_primary_local_ack_timeout(req_msg);
1256 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1258 if (req_msg->alt_local_lid) {
1259 memset(alt_path, 0, sizeof *alt_path);
1260 alt_path->dgid = req_msg->alt_local_gid;
1261 alt_path->sgid = req_msg->alt_remote_gid;
1262 alt_path->dlid = req_msg->alt_local_lid;
1263 alt_path->slid = req_msg->alt_remote_lid;
1264 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1265 alt_path->hop_limit = req_msg->alt_hop_limit;
1266 alt_path->traffic_class = req_msg->alt_traffic_class;
1267 alt_path->reversible = 1;
1268 alt_path->pkey = req_msg->pkey;
1269 alt_path->sl = cm_req_get_alt_sl(req_msg);
1270 alt_path->mtu_selector = IB_SA_EQ;
1271 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1272 alt_path->rate_selector = IB_SA_EQ;
1273 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1274 alt_path->packet_life_time_selector = IB_SA_EQ;
1275 alt_path->packet_life_time =
1276 cm_req_get_alt_local_ack_timeout(req_msg);
1277 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1281 static void cm_format_req_event(struct cm_work *work,
1282 struct cm_id_private *cm_id_priv,
1283 struct ib_cm_id *listen_id)
1285 struct cm_req_msg *req_msg;
1286 struct ib_cm_req_event_param *param;
1288 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1289 param = &work->cm_event.param.req_rcvd;
1290 param->listen_id = listen_id;
1291 param->port = cm_id_priv->av.port->port_num;
1292 param->primary_path = &work->path[0];
1293 if (req_msg->alt_local_lid)
1294 param->alternate_path = &work->path[1];
1296 param->alternate_path = NULL;
1297 param->remote_ca_guid = req_msg->local_ca_guid;
1298 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1299 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1300 param->qp_type = cm_req_get_qp_type(req_msg);
1301 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1302 param->responder_resources = cm_req_get_init_depth(req_msg);
1303 param->initiator_depth = cm_req_get_resp_res(req_msg);
1304 param->local_cm_response_timeout =
1305 cm_req_get_remote_resp_timeout(req_msg);
1306 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1307 param->remote_cm_response_timeout =
1308 cm_req_get_local_resp_timeout(req_msg);
1309 param->retry_count = cm_req_get_retry_count(req_msg);
1310 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1311 param->srq = cm_req_get_srq(req_msg);
1312 work->cm_event.private_data = &req_msg->private_data;
1315 static void cm_process_work(struct cm_id_private *cm_id_priv,
1316 struct cm_work *work)
1320 /* We will typically only have the current event to report. */
1321 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1324 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1325 spin_lock_irq(&cm_id_priv->lock);
1326 work = cm_dequeue_work(cm_id_priv);
1327 spin_unlock_irq(&cm_id_priv->lock);
1329 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1333 cm_deref_id(cm_id_priv);
1335 cm_destroy_id(&cm_id_priv->id, ret);
1338 static void cm_format_mra(struct cm_mra_msg *mra_msg,
1339 struct cm_id_private *cm_id_priv,
1340 enum cm_msg_response msg_mraed, u8 service_timeout,
1341 const void *private_data, u8 private_data_len)
1343 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1344 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1345 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1346 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1347 cm_mra_set_service_timeout(mra_msg, service_timeout);
1349 if (private_data && private_data_len)
1350 memcpy(mra_msg->private_data, private_data, private_data_len);
1353 static void cm_format_rej(struct cm_rej_msg *rej_msg,
1354 struct cm_id_private *cm_id_priv,
1355 enum ib_cm_rej_reason reason,
1358 const void *private_data,
1359 u8 private_data_len)
1361 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1362 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1364 switch(cm_id_priv->id.state) {
1365 case IB_CM_REQ_RCVD:
1366 rej_msg->local_comm_id = 0;
1367 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1369 case IB_CM_MRA_REQ_SENT:
1370 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1371 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1373 case IB_CM_REP_RCVD:
1374 case IB_CM_MRA_REP_SENT:
1375 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1376 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1379 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1380 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1384 rej_msg->reason = cpu_to_be16(reason);
1385 if (ari && ari_length) {
1386 cm_rej_set_reject_info_len(rej_msg, ari_length);
1387 memcpy(rej_msg->ari, ari, ari_length);
1390 if (private_data && private_data_len)
1391 memcpy(rej_msg->private_data, private_data, private_data_len);
1394 static void cm_dup_req_handler(struct cm_work *work,
1395 struct cm_id_private *cm_id_priv)
1397 struct ib_mad_send_buf *msg = NULL;
1400 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1401 counter[CM_REQ_COUNTER]);
1403 /* Quick state check to discard duplicate REQs. */
1404 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1407 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1411 spin_lock_irq(&cm_id_priv->lock);
1412 switch (cm_id_priv->id.state) {
1413 case IB_CM_MRA_REQ_SENT:
1414 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1415 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1416 cm_id_priv->private_data,
1417 cm_id_priv->private_data_len);
1419 case IB_CM_TIMEWAIT:
1420 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1421 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1426 spin_unlock_irq(&cm_id_priv->lock);
1428 ret = ib_post_send_mad(msg, NULL);
1433 unlock: spin_unlock_irq(&cm_id_priv->lock);
1434 free: cm_free_msg(msg);
1437 static struct cm_id_private * cm_match_req(struct cm_work *work,
1438 struct cm_id_private *cm_id_priv)
1440 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1441 struct cm_timewait_info *timewait_info;
1442 struct cm_req_msg *req_msg;
1444 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1446 /* Check for possible duplicate REQ. */
1447 spin_lock_irq(&cm.lock);
1448 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1449 if (timewait_info) {
1450 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1451 timewait_info->work.remote_id);
1452 spin_unlock_irq(&cm.lock);
1453 if (cur_cm_id_priv) {
1454 cm_dup_req_handler(work, cur_cm_id_priv);
1455 cm_deref_id(cur_cm_id_priv);
1460 /* Check for stale connections. */
1461 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1462 if (timewait_info) {
1463 cm_cleanup_timewait(cm_id_priv->timewait_info);
1464 spin_unlock_irq(&cm.lock);
1465 cm_issue_rej(work->port, work->mad_recv_wc,
1466 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1471 /* Find matching listen request. */
1472 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
1473 req_msg->service_id,
1474 req_msg->private_data);
1475 if (!listen_cm_id_priv) {
1476 cm_cleanup_timewait(cm_id_priv->timewait_info);
1477 spin_unlock_irq(&cm.lock);
1478 cm_issue_rej(work->port, work->mad_recv_wc,
1479 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1483 atomic_inc(&listen_cm_id_priv->refcount);
1484 atomic_inc(&cm_id_priv->refcount);
1485 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1486 atomic_inc(&cm_id_priv->work_count);
1487 spin_unlock_irq(&cm.lock);
1489 return listen_cm_id_priv;
1493 * Work-around for inter-subnet connections. If the LIDs are permissive,
1494 * we need to override the LID/SL data in the REQ with the LID information
1495 * in the work completion.
1497 static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
1499 if (!cm_req_get_primary_subnet_local(req_msg)) {
1500 if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) {
1501 req_msg->primary_local_lid = cpu_to_be16(wc->slid);
1502 cm_req_set_primary_sl(req_msg, wc->sl);
1505 if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE)
1506 req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits);
1509 if (!cm_req_get_alt_subnet_local(req_msg)) {
1510 if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) {
1511 req_msg->alt_local_lid = cpu_to_be16(wc->slid);
1512 cm_req_set_alt_sl(req_msg, wc->sl);
1515 if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE)
1516 req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits);
1520 static int cm_req_handler(struct cm_work *work)
1522 struct ib_cm_id *cm_id;
1523 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1524 struct cm_req_msg *req_msg;
1527 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1529 cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
1531 return PTR_ERR(cm_id);
1533 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1534 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1535 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
1536 work->mad_recv_wc->recv_buf.grh,
1538 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1540 if (IS_ERR(cm_id_priv->timewait_info)) {
1541 ret = PTR_ERR(cm_id_priv->timewait_info);
1544 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1545 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1546 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1548 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1549 if (!listen_cm_id_priv) {
1551 kfree(cm_id_priv->timewait_info);
1555 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1556 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1557 cm_id_priv->id.service_id = req_msg->service_id;
1558 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
1560 cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
1561 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1563 memcpy(work->path[0].dmac, cm_id_priv->av.ah_attr.dmac, ETH_ALEN);
1564 work->path[0].vlan_id = cm_id_priv->av.ah_attr.vlan_id;
1565 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1567 ib_get_cached_gid(work->port->cm_dev->ib_device,
1568 work->port->port_num, 0, &work->path[0].sgid);
1569 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1570 &work->path[0].sgid, sizeof work->path[0].sgid,
1574 if (req_msg->alt_local_lid) {
1575 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1577 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1578 &work->path[0].sgid,
1579 sizeof work->path[0].sgid, NULL, 0);
1583 cm_id_priv->tid = req_msg->hdr.tid;
1584 cm_id_priv->timeout_ms = cm_convert_to_ms(
1585 cm_req_get_local_resp_timeout(req_msg));
1586 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1587 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1588 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1589 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1590 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1591 cm_id_priv->pkey = req_msg->pkey;
1592 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1593 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1594 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1595 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
1597 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1598 cm_process_work(cm_id_priv, work);
1599 cm_deref_id(listen_cm_id_priv);
1603 atomic_dec(&cm_id_priv->refcount);
1604 cm_deref_id(listen_cm_id_priv);
1606 ib_destroy_cm_id(cm_id);
1610 static void cm_format_rep(struct cm_rep_msg *rep_msg,
1611 struct cm_id_private *cm_id_priv,
1612 struct ib_cm_rep_param *param)
1614 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1615 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1616 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1617 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1618 rep_msg->resp_resources = param->responder_resources;
1619 cm_rep_set_target_ack_delay(rep_msg,
1620 cm_id_priv->av.port->cm_dev->ack_delay);
1621 cm_rep_set_failover(rep_msg, param->failover_accepted);
1622 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1623 rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
1625 if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
1626 rep_msg->initiator_depth = param->initiator_depth;
1627 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1628 cm_rep_set_srq(rep_msg, param->srq);
1629 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1631 cm_rep_set_srq(rep_msg, 1);
1632 cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num));
1635 if (param->private_data && param->private_data_len)
1636 memcpy(rep_msg->private_data, param->private_data,
1637 param->private_data_len);
1640 int ib_send_cm_rep(struct ib_cm_id *cm_id,
1641 struct ib_cm_rep_param *param)
1643 struct cm_id_private *cm_id_priv;
1644 struct ib_mad_send_buf *msg;
1645 struct cm_rep_msg *rep_msg;
1646 unsigned long flags;
1649 if (param->private_data &&
1650 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1653 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1654 spin_lock_irqsave(&cm_id_priv->lock, flags);
1655 if (cm_id->state != IB_CM_REQ_RCVD &&
1656 cm_id->state != IB_CM_MRA_REQ_SENT) {
1661 ret = cm_alloc_msg(cm_id_priv, &msg);
1665 rep_msg = (struct cm_rep_msg *) msg->mad;
1666 cm_format_rep(rep_msg, cm_id_priv, param);
1667 msg->timeout_ms = cm_id_priv->timeout_ms;
1668 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1670 ret = ib_post_send_mad(msg, NULL);
1672 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1677 cm_id->state = IB_CM_REP_SENT;
1678 cm_id_priv->msg = msg;
1679 cm_id_priv->initiator_depth = param->initiator_depth;
1680 cm_id_priv->responder_resources = param->responder_resources;
1681 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1682 cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
1684 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1687 EXPORT_SYMBOL(ib_send_cm_rep);
1689 static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1690 struct cm_id_private *cm_id_priv,
1691 const void *private_data,
1692 u8 private_data_len)
1694 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1695 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1696 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1698 if (private_data && private_data_len)
1699 memcpy(rtu_msg->private_data, private_data, private_data_len);
1702 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1703 const void *private_data,
1704 u8 private_data_len)
1706 struct cm_id_private *cm_id_priv;
1707 struct ib_mad_send_buf *msg;
1708 unsigned long flags;
1712 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1715 data = cm_copy_private_data(private_data, private_data_len);
1717 return PTR_ERR(data);
1719 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1720 spin_lock_irqsave(&cm_id_priv->lock, flags);
1721 if (cm_id->state != IB_CM_REP_RCVD &&
1722 cm_id->state != IB_CM_MRA_REP_SENT) {
1727 ret = cm_alloc_msg(cm_id_priv, &msg);
1731 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1732 private_data, private_data_len);
1734 ret = ib_post_send_mad(msg, NULL);
1736 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1742 cm_id->state = IB_CM_ESTABLISHED;
1743 cm_set_private_data(cm_id_priv, data, private_data_len);
1744 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1747 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1751 EXPORT_SYMBOL(ib_send_cm_rtu);
1753 static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type)
1755 struct cm_rep_msg *rep_msg;
1756 struct ib_cm_rep_event_param *param;
1758 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1759 param = &work->cm_event.param.rep_rcvd;
1760 param->remote_ca_guid = rep_msg->local_ca_guid;
1761 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1762 param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type));
1763 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1764 param->responder_resources = rep_msg->initiator_depth;
1765 param->initiator_depth = rep_msg->resp_resources;
1766 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1767 param->failover_accepted = cm_rep_get_failover(rep_msg);
1768 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1769 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1770 param->srq = cm_rep_get_srq(rep_msg);
1771 work->cm_event.private_data = &rep_msg->private_data;
1774 static void cm_dup_rep_handler(struct cm_work *work)
1776 struct cm_id_private *cm_id_priv;
1777 struct cm_rep_msg *rep_msg;
1778 struct ib_mad_send_buf *msg = NULL;
1781 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1782 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1783 rep_msg->local_comm_id);
1787 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1788 counter[CM_REP_COUNTER]);
1789 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1793 spin_lock_irq(&cm_id_priv->lock);
1794 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1795 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1796 cm_id_priv->private_data,
1797 cm_id_priv->private_data_len);
1798 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1799 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1800 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1801 cm_id_priv->private_data,
1802 cm_id_priv->private_data_len);
1805 spin_unlock_irq(&cm_id_priv->lock);
1807 ret = ib_post_send_mad(msg, NULL);
1812 unlock: spin_unlock_irq(&cm_id_priv->lock);
1813 free: cm_free_msg(msg);
1814 deref: cm_deref_id(cm_id_priv);
1817 static int cm_rep_handler(struct cm_work *work)
1819 struct cm_id_private *cm_id_priv;
1820 struct cm_rep_msg *rep_msg;
1823 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1824 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1826 cm_dup_rep_handler(work);
1830 cm_format_rep_event(work, cm_id_priv->qp_type);
1832 spin_lock_irq(&cm_id_priv->lock);
1833 switch (cm_id_priv->id.state) {
1834 case IB_CM_REQ_SENT:
1835 case IB_CM_MRA_REQ_RCVD:
1838 spin_unlock_irq(&cm_id_priv->lock);
1843 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1844 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1845 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
1847 spin_lock(&cm.lock);
1848 /* Check for duplicate REP. */
1849 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
1850 spin_unlock(&cm.lock);
1851 spin_unlock_irq(&cm_id_priv->lock);
1855 /* Check for a stale connection. */
1856 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
1857 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1858 &cm.remote_id_table);
1859 cm_id_priv->timewait_info->inserted_remote_id = 0;
1860 spin_unlock(&cm.lock);
1861 spin_unlock_irq(&cm_id_priv->lock);
1862 cm_issue_rej(work->port, work->mad_recv_wc,
1863 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1868 spin_unlock(&cm.lock);
1870 cm_id_priv->id.state = IB_CM_REP_RCVD;
1871 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1872 cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
1873 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1874 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1875 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1876 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1877 cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1878 cm_id_priv->av.timeout =
1879 cm_ack_timeout(cm_id_priv->target_ack_delay,
1880 cm_id_priv->av.timeout - 1);
1881 cm_id_priv->alt_av.timeout =
1882 cm_ack_timeout(cm_id_priv->target_ack_delay,
1883 cm_id_priv->alt_av.timeout - 1);
1885 /* todo: handle peer_to_peer */
1887 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1888 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1890 list_add_tail(&work->list, &cm_id_priv->work_list);
1891 spin_unlock_irq(&cm_id_priv->lock);
1894 cm_process_work(cm_id_priv, work);
1896 cm_deref_id(cm_id_priv);
1900 cm_deref_id(cm_id_priv);
1904 static int cm_establish_handler(struct cm_work *work)
1906 struct cm_id_private *cm_id_priv;
1909 /* See comment in cm_establish about lookup. */
1910 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1914 spin_lock_irq(&cm_id_priv->lock);
1915 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1916 spin_unlock_irq(&cm_id_priv->lock);
1920 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1921 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1923 list_add_tail(&work->list, &cm_id_priv->work_list);
1924 spin_unlock_irq(&cm_id_priv->lock);
1927 cm_process_work(cm_id_priv, work);
1929 cm_deref_id(cm_id_priv);
1932 cm_deref_id(cm_id_priv);
1936 static int cm_rtu_handler(struct cm_work *work)
1938 struct cm_id_private *cm_id_priv;
1939 struct cm_rtu_msg *rtu_msg;
1942 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1943 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1944 rtu_msg->local_comm_id);
1948 work->cm_event.private_data = &rtu_msg->private_data;
1950 spin_lock_irq(&cm_id_priv->lock);
1951 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1952 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1953 spin_unlock_irq(&cm_id_priv->lock);
1954 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1955 counter[CM_RTU_COUNTER]);
1958 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1960 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1961 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1963 list_add_tail(&work->list, &cm_id_priv->work_list);
1964 spin_unlock_irq(&cm_id_priv->lock);
1967 cm_process_work(cm_id_priv, work);
1969 cm_deref_id(cm_id_priv);
1972 cm_deref_id(cm_id_priv);
1976 static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1977 struct cm_id_private *cm_id_priv,
1978 const void *private_data,
1979 u8 private_data_len)
1981 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1982 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1983 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1984 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1985 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1987 if (private_data && private_data_len)
1988 memcpy(dreq_msg->private_data, private_data, private_data_len);
1991 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1992 const void *private_data,
1993 u8 private_data_len)
1995 struct cm_id_private *cm_id_priv;
1996 struct ib_mad_send_buf *msg;
1997 unsigned long flags;
2000 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
2003 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2004 spin_lock_irqsave(&cm_id_priv->lock, flags);
2005 if (cm_id->state != IB_CM_ESTABLISHED) {
2010 if (cm_id->lap_state == IB_CM_LAP_SENT ||
2011 cm_id->lap_state == IB_CM_MRA_LAP_RCVD)
2012 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2014 ret = cm_alloc_msg(cm_id_priv, &msg);
2016 cm_enter_timewait(cm_id_priv);
2020 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
2021 private_data, private_data_len);
2022 msg->timeout_ms = cm_id_priv->timeout_ms;
2023 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
2025 ret = ib_post_send_mad(msg, NULL);
2027 cm_enter_timewait(cm_id_priv);
2028 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2033 cm_id->state = IB_CM_DREQ_SENT;
2034 cm_id_priv->msg = msg;
2035 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2038 EXPORT_SYMBOL(ib_send_cm_dreq);
2040 static void cm_format_drep(struct cm_drep_msg *drep_msg,
2041 struct cm_id_private *cm_id_priv,
2042 const void *private_data,
2043 u8 private_data_len)
2045 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
2046 drep_msg->local_comm_id = cm_id_priv->id.local_id;
2047 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
2049 if (private_data && private_data_len)
2050 memcpy(drep_msg->private_data, private_data, private_data_len);
2053 int ib_send_cm_drep(struct ib_cm_id *cm_id,
2054 const void *private_data,
2055 u8 private_data_len)
2057 struct cm_id_private *cm_id_priv;
2058 struct ib_mad_send_buf *msg;
2059 unsigned long flags;
2063 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
2066 data = cm_copy_private_data(private_data, private_data_len);
2068 return PTR_ERR(data);
2070 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2071 spin_lock_irqsave(&cm_id_priv->lock, flags);
2072 if (cm_id->state != IB_CM_DREQ_RCVD) {
2073 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2078 cm_set_private_data(cm_id_priv, data, private_data_len);
2079 cm_enter_timewait(cm_id_priv);
2081 ret = cm_alloc_msg(cm_id_priv, &msg);
2085 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2086 private_data, private_data_len);
2088 ret = ib_post_send_mad(msg, NULL);
2090 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2095 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2098 EXPORT_SYMBOL(ib_send_cm_drep);
2100 static int cm_issue_drep(struct cm_port *port,
2101 struct ib_mad_recv_wc *mad_recv_wc)
2103 struct ib_mad_send_buf *msg = NULL;
2104 struct cm_dreq_msg *dreq_msg;
2105 struct cm_drep_msg *drep_msg;
2108 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
2112 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
2113 drep_msg = (struct cm_drep_msg *) msg->mad;
2115 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
2116 drep_msg->remote_comm_id = dreq_msg->local_comm_id;
2117 drep_msg->local_comm_id = dreq_msg->remote_comm_id;
2119 ret = ib_post_send_mad(msg, NULL);
2126 static int cm_dreq_handler(struct cm_work *work)
2128 struct cm_id_private *cm_id_priv;
2129 struct cm_dreq_msg *dreq_msg;
2130 struct ib_mad_send_buf *msg = NULL;
2133 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
2134 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
2135 dreq_msg->local_comm_id);
2137 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2138 counter[CM_DREQ_COUNTER]);
2139 cm_issue_drep(work->port, work->mad_recv_wc);
2143 work->cm_event.private_data = &dreq_msg->private_data;
2145 spin_lock_irq(&cm_id_priv->lock);
2146 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
2149 switch (cm_id_priv->id.state) {
2150 case IB_CM_REP_SENT:
2151 case IB_CM_DREQ_SENT:
2152 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2154 case IB_CM_ESTABLISHED:
2155 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
2156 cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2157 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2159 case IB_CM_MRA_REP_RCVD:
2161 case IB_CM_TIMEWAIT:
2162 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2163 counter[CM_DREQ_COUNTER]);
2164 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2167 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2168 cm_id_priv->private_data,
2169 cm_id_priv->private_data_len);
2170 spin_unlock_irq(&cm_id_priv->lock);
2172 if (ib_post_send_mad(msg, NULL))
2175 case IB_CM_DREQ_RCVD:
2176 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2177 counter[CM_DREQ_COUNTER]);
2182 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
2183 cm_id_priv->tid = dreq_msg->hdr.tid;
2184 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2186 list_add_tail(&work->list, &cm_id_priv->work_list);
2187 spin_unlock_irq(&cm_id_priv->lock);
2190 cm_process_work(cm_id_priv, work);
2192 cm_deref_id(cm_id_priv);
2195 unlock: spin_unlock_irq(&cm_id_priv->lock);
2196 deref: cm_deref_id(cm_id_priv);
2200 static int cm_drep_handler(struct cm_work *work)
2202 struct cm_id_private *cm_id_priv;
2203 struct cm_drep_msg *drep_msg;
2206 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
2207 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
2208 drep_msg->local_comm_id);
2212 work->cm_event.private_data = &drep_msg->private_data;
2214 spin_lock_irq(&cm_id_priv->lock);
2215 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2216 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
2217 spin_unlock_irq(&cm_id_priv->lock);
2220 cm_enter_timewait(cm_id_priv);
2222 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2223 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2225 list_add_tail(&work->list, &cm_id_priv->work_list);
2226 spin_unlock_irq(&cm_id_priv->lock);
2229 cm_process_work(cm_id_priv, work);
2231 cm_deref_id(cm_id_priv);
2234 cm_deref_id(cm_id_priv);
2238 int ib_send_cm_rej(struct ib_cm_id *cm_id,
2239 enum ib_cm_rej_reason reason,
2242 const void *private_data,
2243 u8 private_data_len)
2245 struct cm_id_private *cm_id_priv;
2246 struct ib_mad_send_buf *msg;
2247 unsigned long flags;
2250 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2251 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2254 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2256 spin_lock_irqsave(&cm_id_priv->lock, flags);
2257 switch (cm_id->state) {
2258 case IB_CM_REQ_SENT:
2259 case IB_CM_MRA_REQ_RCVD:
2260 case IB_CM_REQ_RCVD:
2261 case IB_CM_MRA_REQ_SENT:
2262 case IB_CM_REP_RCVD:
2263 case IB_CM_MRA_REP_SENT:
2264 ret = cm_alloc_msg(cm_id_priv, &msg);
2266 cm_format_rej((struct cm_rej_msg *) msg->mad,
2267 cm_id_priv, reason, ari, ari_length,
2268 private_data, private_data_len);
2270 cm_reset_to_idle(cm_id_priv);
2272 case IB_CM_REP_SENT:
2273 case IB_CM_MRA_REP_RCVD:
2274 ret = cm_alloc_msg(cm_id_priv, &msg);
2276 cm_format_rej((struct cm_rej_msg *) msg->mad,
2277 cm_id_priv, reason, ari, ari_length,
2278 private_data, private_data_len);
2280 cm_enter_timewait(cm_id_priv);
2290 ret = ib_post_send_mad(msg, NULL);
2294 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2297 EXPORT_SYMBOL(ib_send_cm_rej);
2299 static void cm_format_rej_event(struct cm_work *work)
2301 struct cm_rej_msg *rej_msg;
2302 struct ib_cm_rej_event_param *param;
2304 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2305 param = &work->cm_event.param.rej_rcvd;
2306 param->ari = rej_msg->ari;
2307 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
2308 param->reason = __be16_to_cpu(rej_msg->reason);
2309 work->cm_event.private_data = &rej_msg->private_data;
2312 static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2314 struct cm_timewait_info *timewait_info;
2315 struct cm_id_private *cm_id_priv;
2318 remote_id = rej_msg->local_comm_id;
2320 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
2321 spin_lock_irq(&cm.lock);
2322 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
2324 if (!timewait_info) {
2325 spin_unlock_irq(&cm.lock);
2328 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2329 (timewait_info->work.local_id ^
2330 cm.random_id_operand));
2332 if (cm_id_priv->id.remote_id == remote_id)
2333 atomic_inc(&cm_id_priv->refcount);
2337 spin_unlock_irq(&cm.lock);
2338 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2339 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2341 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2346 static int cm_rej_handler(struct cm_work *work)
2348 struct cm_id_private *cm_id_priv;
2349 struct cm_rej_msg *rej_msg;
2352 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2353 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2357 cm_format_rej_event(work);
2359 spin_lock_irq(&cm_id_priv->lock);
2360 switch (cm_id_priv->id.state) {
2361 case IB_CM_REQ_SENT:
2362 case IB_CM_MRA_REQ_RCVD:
2363 case IB_CM_REP_SENT:
2364 case IB_CM_MRA_REP_RCVD:
2365 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2367 case IB_CM_REQ_RCVD:
2368 case IB_CM_MRA_REQ_SENT:
2369 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
2370 cm_enter_timewait(cm_id_priv);
2372 cm_reset_to_idle(cm_id_priv);
2374 case IB_CM_DREQ_SENT:
2375 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2377 case IB_CM_REP_RCVD:
2378 case IB_CM_MRA_REP_SENT:
2379 cm_enter_timewait(cm_id_priv);
2381 case IB_CM_ESTABLISHED:
2382 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT ||
2383 cm_id_priv->id.lap_state == IB_CM_LAP_SENT) {
2384 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT)
2385 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2387 cm_enter_timewait(cm_id_priv);
2392 spin_unlock_irq(&cm_id_priv->lock);
2397 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2399 list_add_tail(&work->list, &cm_id_priv->work_list);
2400 spin_unlock_irq(&cm_id_priv->lock);
2403 cm_process_work(cm_id_priv, work);
2405 cm_deref_id(cm_id_priv);
2408 cm_deref_id(cm_id_priv);
2412 int ib_send_cm_mra(struct ib_cm_id *cm_id,
2414 const void *private_data,
2415 u8 private_data_len)
2417 struct cm_id_private *cm_id_priv;
2418 struct ib_mad_send_buf *msg;
2419 enum ib_cm_state cm_state;
2420 enum ib_cm_lap_state lap_state;
2421 enum cm_msg_response msg_response;
2423 unsigned long flags;
2426 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2429 data = cm_copy_private_data(private_data, private_data_len);
2431 return PTR_ERR(data);
2433 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2435 spin_lock_irqsave(&cm_id_priv->lock, flags);
2436 switch(cm_id_priv->id.state) {
2437 case IB_CM_REQ_RCVD:
2438 cm_state = IB_CM_MRA_REQ_SENT;
2439 lap_state = cm_id->lap_state;
2440 msg_response = CM_MSG_RESPONSE_REQ;
2442 case IB_CM_REP_RCVD:
2443 cm_state = IB_CM_MRA_REP_SENT;
2444 lap_state = cm_id->lap_state;
2445 msg_response = CM_MSG_RESPONSE_REP;
2447 case IB_CM_ESTABLISHED:
2448 if (cm_id->lap_state == IB_CM_LAP_RCVD) {
2449 cm_state = cm_id->state;
2450 lap_state = IB_CM_MRA_LAP_SENT;
2451 msg_response = CM_MSG_RESPONSE_OTHER;
2459 if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) {
2460 ret = cm_alloc_msg(cm_id_priv, &msg);
2464 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2465 msg_response, service_timeout,
2466 private_data, private_data_len);
2467 ret = ib_post_send_mad(msg, NULL);
2472 cm_id->state = cm_state;
2473 cm_id->lap_state = lap_state;
2474 cm_id_priv->service_timeout = service_timeout;
2475 cm_set_private_data(cm_id_priv, data, private_data_len);
2476 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2479 error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2483 error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2488 EXPORT_SYMBOL(ib_send_cm_mra);
2490 static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2492 switch (cm_mra_get_msg_mraed(mra_msg)) {
2493 case CM_MSG_RESPONSE_REQ:
2494 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2495 case CM_MSG_RESPONSE_REP:
2496 case CM_MSG_RESPONSE_OTHER:
2497 return cm_acquire_id(mra_msg->remote_comm_id,
2498 mra_msg->local_comm_id);
2504 static int cm_mra_handler(struct cm_work *work)
2506 struct cm_id_private *cm_id_priv;
2507 struct cm_mra_msg *mra_msg;
2510 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2511 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2515 work->cm_event.private_data = &mra_msg->private_data;
2516 work->cm_event.param.mra_rcvd.service_timeout =
2517 cm_mra_get_service_timeout(mra_msg);
2518 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2519 cm_convert_to_ms(cm_id_priv->av.timeout);
2521 spin_lock_irq(&cm_id_priv->lock);
2522 switch (cm_id_priv->id.state) {
2523 case IB_CM_REQ_SENT:
2524 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2525 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2526 cm_id_priv->msg, timeout))
2528 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2530 case IB_CM_REP_SENT:
2531 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2532 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2533 cm_id_priv->msg, timeout))
2535 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2537 case IB_CM_ESTABLISHED:
2538 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2539 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2540 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2541 cm_id_priv->msg, timeout)) {
2542 if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2543 atomic_long_inc(&work->port->
2544 counter_group[CM_RECV_DUPLICATES].
2545 counter[CM_MRA_COUNTER]);
2548 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2550 case IB_CM_MRA_REQ_RCVD:
2551 case IB_CM_MRA_REP_RCVD:
2552 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2553 counter[CM_MRA_COUNTER]);
2559 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2560 cm_id_priv->id.state;
2561 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2563 list_add_tail(&work->list, &cm_id_priv->work_list);
2564 spin_unlock_irq(&cm_id_priv->lock);
2567 cm_process_work(cm_id_priv, work);
2569 cm_deref_id(cm_id_priv);
2572 spin_unlock_irq(&cm_id_priv->lock);
2573 cm_deref_id(cm_id_priv);
2577 static void cm_format_lap(struct cm_lap_msg *lap_msg,
2578 struct cm_id_private *cm_id_priv,
2579 struct ib_sa_path_rec *alternate_path,
2580 const void *private_data,
2581 u8 private_data_len)
2583 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2584 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2585 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2586 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2587 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2588 /* todo: need remote CM response timeout */
2589 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2590 lap_msg->alt_local_lid = alternate_path->slid;
2591 lap_msg->alt_remote_lid = alternate_path->dlid;
2592 lap_msg->alt_local_gid = alternate_path->sgid;
2593 lap_msg->alt_remote_gid = alternate_path->dgid;
2594 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2595 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2596 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2597 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2598 cm_lap_set_sl(lap_msg, alternate_path->sl);
2599 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2600 cm_lap_set_local_ack_timeout(lap_msg,
2601 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
2602 alternate_path->packet_life_time));
2604 if (private_data && private_data_len)
2605 memcpy(lap_msg->private_data, private_data, private_data_len);
2608 int ib_send_cm_lap(struct ib_cm_id *cm_id,
2609 struct ib_sa_path_rec *alternate_path,
2610 const void *private_data,
2611 u8 private_data_len)
2613 struct cm_id_private *cm_id_priv;
2614 struct ib_mad_send_buf *msg;
2615 unsigned long flags;
2618 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2621 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2622 spin_lock_irqsave(&cm_id_priv->lock, flags);
2623 if (cm_id->state != IB_CM_ESTABLISHED ||
2624 (cm_id->lap_state != IB_CM_LAP_UNINIT &&
2625 cm_id->lap_state != IB_CM_LAP_IDLE)) {
2630 ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av);
2633 cm_id_priv->alt_av.timeout =
2634 cm_ack_timeout(cm_id_priv->target_ack_delay,
2635 cm_id_priv->alt_av.timeout - 1);
2637 ret = cm_alloc_msg(cm_id_priv, &msg);
2641 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2642 alternate_path, private_data, private_data_len);
2643 msg->timeout_ms = cm_id_priv->timeout_ms;
2644 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2646 ret = ib_post_send_mad(msg, NULL);
2648 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2653 cm_id->lap_state = IB_CM_LAP_SENT;
2654 cm_id_priv->msg = msg;
2656 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2659 EXPORT_SYMBOL(ib_send_cm_lap);
2661 static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
2662 struct ib_sa_path_rec *path,
2663 struct cm_lap_msg *lap_msg)
2665 memset(path, 0, sizeof *path);
2666 path->dgid = lap_msg->alt_local_gid;
2667 path->sgid = lap_msg->alt_remote_gid;
2668 path->dlid = lap_msg->alt_local_lid;
2669 path->slid = lap_msg->alt_remote_lid;
2670 path->flow_label = cm_lap_get_flow_label(lap_msg);
2671 path->hop_limit = lap_msg->alt_hop_limit;
2672 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2673 path->reversible = 1;
2674 path->pkey = cm_id_priv->pkey;
2675 path->sl = cm_lap_get_sl(lap_msg);
2676 path->mtu_selector = IB_SA_EQ;
2677 path->mtu = cm_id_priv->path_mtu;
2678 path->rate_selector = IB_SA_EQ;
2679 path->rate = cm_lap_get_packet_rate(lap_msg);
2680 path->packet_life_time_selector = IB_SA_EQ;
2681 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2682 path->packet_life_time -= (path->packet_life_time > 0);
2685 static int cm_lap_handler(struct cm_work *work)
2687 struct cm_id_private *cm_id_priv;
2688 struct cm_lap_msg *lap_msg;
2689 struct ib_cm_lap_event_param *param;
2690 struct ib_mad_send_buf *msg = NULL;
2693 /* todo: verify LAP request and send reject APR if invalid. */
2694 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2695 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2696 lap_msg->local_comm_id);
2700 param = &work->cm_event.param.lap_rcvd;
2701 param->alternate_path = &work->path[0];
2702 cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
2703 work->cm_event.private_data = &lap_msg->private_data;
2705 spin_lock_irq(&cm_id_priv->lock);
2706 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2709 switch (cm_id_priv->id.lap_state) {
2710 case IB_CM_LAP_UNINIT:
2711 case IB_CM_LAP_IDLE:
2713 case IB_CM_MRA_LAP_SENT:
2714 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2715 counter[CM_LAP_COUNTER]);
2716 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2719 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2720 CM_MSG_RESPONSE_OTHER,
2721 cm_id_priv->service_timeout,
2722 cm_id_priv->private_data,
2723 cm_id_priv->private_data_len);
2724 spin_unlock_irq(&cm_id_priv->lock);
2726 if (ib_post_send_mad(msg, NULL))
2729 case IB_CM_LAP_RCVD:
2730 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2731 counter[CM_LAP_COUNTER]);
2737 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2738 cm_id_priv->tid = lap_msg->hdr.tid;
2739 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2740 work->mad_recv_wc->recv_buf.grh,
2742 cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av);
2743 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2745 list_add_tail(&work->list, &cm_id_priv->work_list);
2746 spin_unlock_irq(&cm_id_priv->lock);
2749 cm_process_work(cm_id_priv, work);
2751 cm_deref_id(cm_id_priv);
2754 unlock: spin_unlock_irq(&cm_id_priv->lock);
2755 deref: cm_deref_id(cm_id_priv);
2759 static void cm_format_apr(struct cm_apr_msg *apr_msg,
2760 struct cm_id_private *cm_id_priv,
2761 enum ib_cm_apr_status status,
2764 const void *private_data,
2765 u8 private_data_len)
2767 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2768 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2769 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2770 apr_msg->ap_status = (u8) status;
2772 if (info && info_length) {
2773 apr_msg->info_length = info_length;
2774 memcpy(apr_msg->info, info, info_length);
2777 if (private_data && private_data_len)
2778 memcpy(apr_msg->private_data, private_data, private_data_len);
2781 int ib_send_cm_apr(struct ib_cm_id *cm_id,
2782 enum ib_cm_apr_status status,
2785 const void *private_data,
2786 u8 private_data_len)
2788 struct cm_id_private *cm_id_priv;
2789 struct ib_mad_send_buf *msg;
2790 unsigned long flags;
2793 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2794 (info && info_length > IB_CM_APR_INFO_LENGTH))
2797 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2798 spin_lock_irqsave(&cm_id_priv->lock, flags);
2799 if (cm_id->state != IB_CM_ESTABLISHED ||
2800 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2801 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2806 ret = cm_alloc_msg(cm_id_priv, &msg);
2810 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2811 info, info_length, private_data, private_data_len);
2812 ret = ib_post_send_mad(msg, NULL);
2814 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2819 cm_id->lap_state = IB_CM_LAP_IDLE;
2820 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2823 EXPORT_SYMBOL(ib_send_cm_apr);
2825 static int cm_apr_handler(struct cm_work *work)
2827 struct cm_id_private *cm_id_priv;
2828 struct cm_apr_msg *apr_msg;
2831 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2832 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2833 apr_msg->local_comm_id);
2835 return -EINVAL; /* Unmatched reply. */
2837 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2838 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2839 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2840 work->cm_event.private_data = &apr_msg->private_data;
2842 spin_lock_irq(&cm_id_priv->lock);
2843 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2844 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2845 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2846 spin_unlock_irq(&cm_id_priv->lock);
2849 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
2850 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2851 cm_id_priv->msg = NULL;
2853 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2855 list_add_tail(&work->list, &cm_id_priv->work_list);
2856 spin_unlock_irq(&cm_id_priv->lock);
2859 cm_process_work(cm_id_priv, work);
2861 cm_deref_id(cm_id_priv);
2864 cm_deref_id(cm_id_priv);
2868 static int cm_timewait_handler(struct cm_work *work)
2870 struct cm_timewait_info *timewait_info;
2871 struct cm_id_private *cm_id_priv;
2874 timewait_info = (struct cm_timewait_info *)work;
2875 spin_lock_irq(&cm.lock);
2876 list_del(&timewait_info->list);
2877 spin_unlock_irq(&cm.lock);
2879 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2880 timewait_info->work.remote_id);
2884 spin_lock_irq(&cm_id_priv->lock);
2885 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2886 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2887 spin_unlock_irq(&cm_id_priv->lock);
2890 cm_id_priv->id.state = IB_CM_IDLE;
2891 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2893 list_add_tail(&work->list, &cm_id_priv->work_list);
2894 spin_unlock_irq(&cm_id_priv->lock);
2897 cm_process_work(cm_id_priv, work);
2899 cm_deref_id(cm_id_priv);
2902 cm_deref_id(cm_id_priv);
2906 static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2907 struct cm_id_private *cm_id_priv,
2908 struct ib_cm_sidr_req_param *param)
2910 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2911 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2912 sidr_req_msg->request_id = cm_id_priv->id.local_id;
2913 sidr_req_msg->pkey = param->path->pkey;
2914 sidr_req_msg->service_id = param->service_id;
2916 if (param->private_data && param->private_data_len)
2917 memcpy(sidr_req_msg->private_data, param->private_data,
2918 param->private_data_len);
2921 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2922 struct ib_cm_sidr_req_param *param)
2924 struct cm_id_private *cm_id_priv;
2925 struct ib_mad_send_buf *msg;
2926 unsigned long flags;
2929 if (!param->path || (param->private_data &&
2930 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2933 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2934 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2938 cm_id->service_id = param->service_id;
2939 cm_id->service_mask = ~cpu_to_be64(0);
2940 cm_id_priv->timeout_ms = param->timeout_ms;
2941 cm_id_priv->max_cm_retries = param->max_cm_retries;
2942 ret = cm_alloc_msg(cm_id_priv, &msg);
2946 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2948 msg->timeout_ms = cm_id_priv->timeout_ms;
2949 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2951 spin_lock_irqsave(&cm_id_priv->lock, flags);
2952 if (cm_id->state == IB_CM_IDLE)
2953 ret = ib_post_send_mad(msg, NULL);
2958 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2962 cm_id->state = IB_CM_SIDR_REQ_SENT;
2963 cm_id_priv->msg = msg;
2964 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2968 EXPORT_SYMBOL(ib_send_cm_sidr_req);
2970 static void cm_format_sidr_req_event(struct cm_work *work,
2971 struct ib_cm_id *listen_id)
2973 struct cm_sidr_req_msg *sidr_req_msg;
2974 struct ib_cm_sidr_req_event_param *param;
2976 sidr_req_msg = (struct cm_sidr_req_msg *)
2977 work->mad_recv_wc->recv_buf.mad;
2978 param = &work->cm_event.param.sidr_req_rcvd;
2979 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
2980 param->listen_id = listen_id;
2981 param->port = work->port->port_num;
2982 work->cm_event.private_data = &sidr_req_msg->private_data;
2985 static int cm_sidr_req_handler(struct cm_work *work)
2987 struct ib_cm_id *cm_id;
2988 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2989 struct cm_sidr_req_msg *sidr_req_msg;
2992 cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
2994 return PTR_ERR(cm_id);
2995 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2997 /* Record SGID/SLID and request ID for lookup. */
2998 sidr_req_msg = (struct cm_sidr_req_msg *)
2999 work->mad_recv_wc->recv_buf.mad;
3000 wc = work->mad_recv_wc->wc;
3001 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
3002 cm_id_priv->av.dgid.global.interface_id = 0;
3003 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
3004 work->mad_recv_wc->recv_buf.grh,
3006 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
3007 cm_id_priv->tid = sidr_req_msg->hdr.tid;
3008 atomic_inc(&cm_id_priv->work_count);
3010 spin_lock_irq(&cm.lock);
3011 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
3012 if (cur_cm_id_priv) {
3013 spin_unlock_irq(&cm.lock);
3014 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
3015 counter[CM_SIDR_REQ_COUNTER]);
3016 goto out; /* Duplicate message. */
3018 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
3019 cur_cm_id_priv = cm_find_listen(cm_id->device,
3020 sidr_req_msg->service_id,
3021 sidr_req_msg->private_data);
3022 if (!cur_cm_id_priv) {
3023 spin_unlock_irq(&cm.lock);
3024 cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED);
3025 goto out; /* No match. */
3027 atomic_inc(&cur_cm_id_priv->refcount);
3028 atomic_inc(&cm_id_priv->refcount);
3029 spin_unlock_irq(&cm.lock);
3031 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
3032 cm_id_priv->id.context = cur_cm_id_priv->id.context;
3033 cm_id_priv->id.service_id = sidr_req_msg->service_id;
3034 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
3036 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
3037 cm_process_work(cm_id_priv, work);
3038 cm_deref_id(cur_cm_id_priv);
3041 ib_destroy_cm_id(&cm_id_priv->id);
3045 static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
3046 struct cm_id_private *cm_id_priv,
3047 struct ib_cm_sidr_rep_param *param)
3049 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
3051 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
3052 sidr_rep_msg->status = param->status;
3053 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
3054 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
3055 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
3057 if (param->info && param->info_length)
3058 memcpy(sidr_rep_msg->info, param->info, param->info_length);
3060 if (param->private_data && param->private_data_len)
3061 memcpy(sidr_rep_msg->private_data, param->private_data,
3062 param->private_data_len);
3065 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
3066 struct ib_cm_sidr_rep_param *param)
3068 struct cm_id_private *cm_id_priv;
3069 struct ib_mad_send_buf *msg;
3070 unsigned long flags;
3073 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
3074 (param->private_data &&
3075 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
3078 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3079 spin_lock_irqsave(&cm_id_priv->lock, flags);
3080 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
3085 ret = cm_alloc_msg(cm_id_priv, &msg);
3089 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
3091 ret = ib_post_send_mad(msg, NULL);
3093 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3097 cm_id->state = IB_CM_IDLE;
3098 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3100 spin_lock_irqsave(&cm.lock, flags);
3101 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
3102 spin_unlock_irqrestore(&cm.lock, flags);
3105 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3108 EXPORT_SYMBOL(ib_send_cm_sidr_rep);
3110 static void cm_format_sidr_rep_event(struct cm_work *work)
3112 struct cm_sidr_rep_msg *sidr_rep_msg;
3113 struct ib_cm_sidr_rep_event_param *param;
3115 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3116 work->mad_recv_wc->recv_buf.mad;
3117 param = &work->cm_event.param.sidr_rep_rcvd;
3118 param->status = sidr_rep_msg->status;
3119 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
3120 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
3121 param->info = &sidr_rep_msg->info;
3122 param->info_len = sidr_rep_msg->info_length;
3123 work->cm_event.private_data = &sidr_rep_msg->private_data;
3126 static int cm_sidr_rep_handler(struct cm_work *work)
3128 struct cm_sidr_rep_msg *sidr_rep_msg;
3129 struct cm_id_private *cm_id_priv;
3131 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3132 work->mad_recv_wc->recv_buf.mad;
3133 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
3135 return -EINVAL; /* Unmatched reply. */
3137 spin_lock_irq(&cm_id_priv->lock);
3138 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
3139 spin_unlock_irq(&cm_id_priv->lock);
3142 cm_id_priv->id.state = IB_CM_IDLE;
3143 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
3144 spin_unlock_irq(&cm_id_priv->lock);
3146 cm_format_sidr_rep_event(work);
3147 cm_process_work(cm_id_priv, work);
3150 cm_deref_id(cm_id_priv);
3154 static void cm_process_send_error(struct ib_mad_send_buf *msg,
3155 enum ib_wc_status wc_status)
3157 struct cm_id_private *cm_id_priv;
3158 struct ib_cm_event cm_event;
3159 enum ib_cm_state state;
3162 memset(&cm_event, 0, sizeof cm_event);
3163 cm_id_priv = msg->context[0];
3165 /* Discard old sends or ones without a response. */
3166 spin_lock_irq(&cm_id_priv->lock);
3167 state = (enum ib_cm_state) (unsigned long) msg->context[1];
3168 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
3172 case IB_CM_REQ_SENT:
3173 case IB_CM_MRA_REQ_RCVD:
3174 cm_reset_to_idle(cm_id_priv);
3175 cm_event.event = IB_CM_REQ_ERROR;
3177 case IB_CM_REP_SENT:
3178 case IB_CM_MRA_REP_RCVD:
3179 cm_reset_to_idle(cm_id_priv);
3180 cm_event.event = IB_CM_REP_ERROR;
3182 case IB_CM_DREQ_SENT:
3183 cm_enter_timewait(cm_id_priv);
3184 cm_event.event = IB_CM_DREQ_ERROR;
3186 case IB_CM_SIDR_REQ_SENT:
3187 cm_id_priv->id.state = IB_CM_IDLE;
3188 cm_event.event = IB_CM_SIDR_REQ_ERROR;
3193 spin_unlock_irq(&cm_id_priv->lock);
3194 cm_event.param.send_status = wc_status;
3196 /* No other events can occur on the cm_id at this point. */
3197 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
3200 ib_destroy_cm_id(&cm_id_priv->id);
3203 spin_unlock_irq(&cm_id_priv->lock);
3207 static void cm_send_handler(struct ib_mad_agent *mad_agent,
3208 struct ib_mad_send_wc *mad_send_wc)
3210 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
3211 struct cm_port *port;
3214 port = mad_agent->context;
3215 attr_index = be16_to_cpu(((struct ib_mad_hdr *)
3216 msg->mad)->attr_id) - CM_ATTR_ID_OFFSET;
3219 * If the send was in response to a received message (context[0] is not
3220 * set to a cm_id), and is not a REJ, then it is a send that was
3223 if (!msg->context[0] && (attr_index != CM_REJ_COUNTER))
3226 atomic_long_add(1 + msg->retries,
3227 &port->counter_group[CM_XMIT].counter[attr_index]);
3229 atomic_long_add(msg->retries,
3230 &port->counter_group[CM_XMIT_RETRIES].
3231 counter[attr_index]);
3233 switch (mad_send_wc->status) {
3235 case IB_WC_WR_FLUSH_ERR:
3239 if (msg->context[0] && msg->context[1])
3240 cm_process_send_error(msg, mad_send_wc->status);
3247 static void cm_work_handler(struct work_struct *_work)
3249 struct cm_work *work = container_of(_work, struct cm_work, work.work);
3252 switch (work->cm_event.event) {
3253 case IB_CM_REQ_RECEIVED:
3254 ret = cm_req_handler(work);
3256 case IB_CM_MRA_RECEIVED:
3257 ret = cm_mra_handler(work);
3259 case IB_CM_REJ_RECEIVED:
3260 ret = cm_rej_handler(work);
3262 case IB_CM_REP_RECEIVED:
3263 ret = cm_rep_handler(work);
3265 case IB_CM_RTU_RECEIVED:
3266 ret = cm_rtu_handler(work);
3268 case IB_CM_USER_ESTABLISHED:
3269 ret = cm_establish_handler(work);
3271 case IB_CM_DREQ_RECEIVED:
3272 ret = cm_dreq_handler(work);
3274 case IB_CM_DREP_RECEIVED:
3275 ret = cm_drep_handler(work);
3277 case IB_CM_SIDR_REQ_RECEIVED:
3278 ret = cm_sidr_req_handler(work);
3280 case IB_CM_SIDR_REP_RECEIVED:
3281 ret = cm_sidr_rep_handler(work);
3283 case IB_CM_LAP_RECEIVED:
3284 ret = cm_lap_handler(work);
3286 case IB_CM_APR_RECEIVED:
3287 ret = cm_apr_handler(work);
3289 case IB_CM_TIMEWAIT_EXIT:
3290 ret = cm_timewait_handler(work);
3300 static int cm_establish(struct ib_cm_id *cm_id)
3302 struct cm_id_private *cm_id_priv;
3303 struct cm_work *work;
3304 unsigned long flags;
3307 work = kmalloc(sizeof *work, GFP_ATOMIC);
3311 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3312 spin_lock_irqsave(&cm_id_priv->lock, flags);
3313 switch (cm_id->state)
3315 case IB_CM_REP_SENT:
3316 case IB_CM_MRA_REP_RCVD:
3317 cm_id->state = IB_CM_ESTABLISHED;
3319 case IB_CM_ESTABLISHED:
3326 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3334 * The CM worker thread may try to destroy the cm_id before it
3335 * can execute this work item. To prevent potential deadlock,
3336 * we need to find the cm_id once we're in the context of the
3337 * worker thread, rather than holding a reference on it.
3339 INIT_DELAYED_WORK(&work->work, cm_work_handler);
3340 work->local_id = cm_id->local_id;
3341 work->remote_id = cm_id->remote_id;
3342 work->mad_recv_wc = NULL;
3343 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3344 queue_delayed_work(cm.wq, &work->work, 0);
3349 static int cm_migrate(struct ib_cm_id *cm_id)
3351 struct cm_id_private *cm_id_priv;
3352 unsigned long flags;
3355 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3356 spin_lock_irqsave(&cm_id_priv->lock, flags);
3357 if (cm_id->state == IB_CM_ESTABLISHED &&
3358 (cm_id->lap_state == IB_CM_LAP_UNINIT ||
3359 cm_id->lap_state == IB_CM_LAP_IDLE)) {
3360 cm_id->lap_state = IB_CM_LAP_IDLE;
3361 cm_id_priv->av = cm_id_priv->alt_av;
3364 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3369 int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
3374 case IB_EVENT_COMM_EST:
3375 ret = cm_establish(cm_id);
3377 case IB_EVENT_PATH_MIG:
3378 ret = cm_migrate(cm_id);
3385 EXPORT_SYMBOL(ib_cm_notify);
3387 static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3388 struct ib_mad_recv_wc *mad_recv_wc)
3390 struct cm_port *port = mad_agent->context;
3391 struct cm_work *work;
3392 enum ib_cm_event_type event;
3396 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3397 case CM_REQ_ATTR_ID:
3398 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3399 alt_local_lid != 0);
3400 event = IB_CM_REQ_RECEIVED;
3402 case CM_MRA_ATTR_ID:
3403 event = IB_CM_MRA_RECEIVED;
3405 case CM_REJ_ATTR_ID:
3406 event = IB_CM_REJ_RECEIVED;
3408 case CM_REP_ATTR_ID:
3409 event = IB_CM_REP_RECEIVED;
3411 case CM_RTU_ATTR_ID:
3412 event = IB_CM_RTU_RECEIVED;
3414 case CM_DREQ_ATTR_ID:
3415 event = IB_CM_DREQ_RECEIVED;
3417 case CM_DREP_ATTR_ID:
3418 event = IB_CM_DREP_RECEIVED;
3420 case CM_SIDR_REQ_ATTR_ID:
3421 event = IB_CM_SIDR_REQ_RECEIVED;
3423 case CM_SIDR_REP_ATTR_ID:
3424 event = IB_CM_SIDR_REP_RECEIVED;
3426 case CM_LAP_ATTR_ID:
3428 event = IB_CM_LAP_RECEIVED;
3430 case CM_APR_ATTR_ID:
3431 event = IB_CM_APR_RECEIVED;
3434 ib_free_recv_mad(mad_recv_wc);
3438 attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id);
3439 atomic_long_inc(&port->counter_group[CM_RECV].
3440 counter[attr_id - CM_ATTR_ID_OFFSET]);
3442 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3445 ib_free_recv_mad(mad_recv_wc);
3449 INIT_DELAYED_WORK(&work->work, cm_work_handler);
3450 work->cm_event.event = event;
3451 work->mad_recv_wc = mad_recv_wc;
3453 queue_delayed_work(cm.wq, &work->work, 0);
3456 static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3457 struct ib_qp_attr *qp_attr,
3460 unsigned long flags;
3463 spin_lock_irqsave(&cm_id_priv->lock, flags);
3464 switch (cm_id_priv->id.state) {
3465 case IB_CM_REQ_SENT:
3466 case IB_CM_MRA_REQ_RCVD:
3467 case IB_CM_REQ_RCVD:
3468 case IB_CM_MRA_REQ_SENT:
3469 case IB_CM_REP_RCVD:
3470 case IB_CM_MRA_REP_SENT:
3471 case IB_CM_REP_SENT:
3472 case IB_CM_MRA_REP_RCVD:
3473 case IB_CM_ESTABLISHED:
3474 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3475 IB_QP_PKEY_INDEX | IB_QP_PORT;
3476 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
3477 if (cm_id_priv->responder_resources)
3478 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3479 IB_ACCESS_REMOTE_ATOMIC;
3480 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3481 qp_attr->port_num = cm_id_priv->av.port->port_num;
3488 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3492 static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3493 struct ib_qp_attr *qp_attr,
3496 unsigned long flags;
3499 spin_lock_irqsave(&cm_id_priv->lock, flags);
3500 switch (cm_id_priv->id.state) {
3501 case IB_CM_REQ_RCVD:
3502 case IB_CM_MRA_REQ_SENT:
3503 case IB_CM_REP_RCVD:
3504 case IB_CM_MRA_REP_SENT:
3505 case IB_CM_REP_SENT:
3506 case IB_CM_MRA_REP_RCVD:
3507 case IB_CM_ESTABLISHED:
3508 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
3509 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
3510 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3511 if (!cm_id_priv->av.valid) {
3512 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3515 if (cm_id_priv->av.ah_attr.vlan_id != 0xffff) {
3516 qp_attr->vlan_id = cm_id_priv->av.ah_attr.vlan_id;
3517 *qp_attr_mask |= IB_QP_VID;
3519 if (!is_zero_ether_addr(cm_id_priv->av.smac)) {
3520 memcpy(qp_attr->smac, cm_id_priv->av.smac,
3521 sizeof(qp_attr->smac));
3522 *qp_attr_mask |= IB_QP_SMAC;
3524 if (cm_id_priv->alt_av.valid) {
3525 if (cm_id_priv->alt_av.ah_attr.vlan_id != 0xffff) {
3526 qp_attr->alt_vlan_id =
3527 cm_id_priv->alt_av.ah_attr.vlan_id;
3528 *qp_attr_mask |= IB_QP_ALT_VID;
3530 if (!is_zero_ether_addr(cm_id_priv->alt_av.smac)) {
3531 memcpy(qp_attr->alt_smac,
3532 cm_id_priv->alt_av.smac,
3533 sizeof(qp_attr->alt_smac));
3534 *qp_attr_mask |= IB_QP_ALT_SMAC;
3537 qp_attr->path_mtu = cm_id_priv->path_mtu;
3538 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3539 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
3540 if (cm_id_priv->qp_type == IB_QPT_RC ||
3541 cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
3542 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3543 IB_QP_MIN_RNR_TIMER;
3544 qp_attr->max_dest_rd_atomic =
3545 cm_id_priv->responder_resources;
3546 qp_attr->min_rnr_timer = 0;
3548 if (cm_id_priv->alt_av.ah_attr.dlid) {
3549 *qp_attr_mask |= IB_QP_ALT_PATH;
3550 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3551 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
3552 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
3553 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3561 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3565 static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3566 struct ib_qp_attr *qp_attr,
3569 unsigned long flags;
3572 spin_lock_irqsave(&cm_id_priv->lock, flags);
3573 switch (cm_id_priv->id.state) {
3574 /* Allow transition to RTS before sending REP */
3575 case IB_CM_REQ_RCVD:
3576 case IB_CM_MRA_REQ_SENT:
3578 case IB_CM_REP_RCVD:
3579 case IB_CM_MRA_REP_SENT:
3580 case IB_CM_REP_SENT:
3581 case IB_CM_MRA_REP_RCVD:
3582 case IB_CM_ESTABLISHED:
3583 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
3584 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
3585 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
3586 switch (cm_id_priv->qp_type) {
3588 case IB_QPT_XRC_INI:
3589 *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY |
3590 IB_QP_MAX_QP_RD_ATOMIC;
3591 qp_attr->retry_cnt = cm_id_priv->retry_count;
3592 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3593 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3595 case IB_QPT_XRC_TGT:
3596 *qp_attr_mask |= IB_QP_TIMEOUT;
3597 qp_attr->timeout = cm_id_priv->av.timeout;
3602 if (cm_id_priv->alt_av.ah_attr.dlid) {
3603 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3604 qp_attr->path_mig_state = IB_MIG_REARM;
3607 *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
3608 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3609 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
3610 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
3611 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3612 qp_attr->path_mig_state = IB_MIG_REARM;
3620 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3624 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3625 struct ib_qp_attr *qp_attr,
3628 struct cm_id_private *cm_id_priv;
3631 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3632 switch (qp_attr->qp_state) {
3634 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3637 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3640 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3648 EXPORT_SYMBOL(ib_cm_init_qp_attr);
3650 static void cm_get_ack_delay(struct cm_device *cm_dev)
3652 struct ib_device_attr attr;
3654 if (ib_query_device(cm_dev->ib_device, &attr))
3655 cm_dev->ack_delay = 0; /* acks will rely on packet life time */
3657 cm_dev->ack_delay = attr.local_ca_ack_delay;
3660 static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr,
3663 struct cm_counter_group *group;
3664 struct cm_counter_attribute *cm_attr;
3666 group = container_of(obj, struct cm_counter_group, obj);
3667 cm_attr = container_of(attr, struct cm_counter_attribute, attr);
3669 return sprintf(buf, "%ld\n",
3670 atomic_long_read(&group->counter[cm_attr->index]));
3673 static const struct sysfs_ops cm_counter_ops = {
3674 .show = cm_show_counter
3677 static struct kobj_type cm_counter_obj_type = {
3678 .sysfs_ops = &cm_counter_ops,
3679 .default_attrs = cm_counter_default_attrs
3682 static void cm_release_port_obj(struct kobject *obj)
3684 struct cm_port *cm_port;
3686 cm_port = container_of(obj, struct cm_port, port_obj);
3690 static struct kobj_type cm_port_obj_type = {
3691 .release = cm_release_port_obj
3694 static char *cm_devnode(struct device *dev, umode_t *mode)
3698 return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
3701 struct class cm_class = {
3702 .owner = THIS_MODULE,
3703 .name = "infiniband_cm",
3704 .devnode = cm_devnode,
3706 EXPORT_SYMBOL(cm_class);
3708 static int cm_create_port_fs(struct cm_port *port)
3712 ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type,
3713 &port->cm_dev->device->kobj,
3714 "%d", port->port_num);
3720 for (i = 0; i < CM_COUNTER_GROUPS; i++) {
3721 ret = kobject_init_and_add(&port->counter_group[i].obj,
3722 &cm_counter_obj_type,
3724 "%s", counter_group_names[i]);
3733 kobject_put(&port->counter_group[i].obj);
3734 kobject_put(&port->port_obj);
3739 static void cm_remove_port_fs(struct cm_port *port)
3743 for (i = 0; i < CM_COUNTER_GROUPS; i++)
3744 kobject_put(&port->counter_group[i].obj);
3746 kobject_put(&port->port_obj);
3749 static void cm_add_one(struct ib_device *ib_device)
3751 struct cm_device *cm_dev;
3752 struct cm_port *port;
3753 struct ib_mad_reg_req reg_req = {
3754 .mgmt_class = IB_MGMT_CLASS_CM,
3755 .mgmt_class_version = IB_CM_CLASS_VERSION,
3757 struct ib_port_modify port_modify = {
3758 .set_port_cap_mask = IB_PORT_CM_SUP
3760 unsigned long flags;
3764 if (rdma_node_get_transport(ib_device->node_type) != RDMA_TRANSPORT_IB)
3767 cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) *
3768 ib_device->phys_port_cnt, GFP_KERNEL);
3772 cm_dev->ib_device = ib_device;
3773 cm_get_ack_delay(cm_dev);
3775 cm_dev->device = device_create(&cm_class, &ib_device->dev,
3777 "%s", ib_device->name);
3778 if (IS_ERR(cm_dev->device)) {
3783 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3784 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
3785 port = kzalloc(sizeof *port, GFP_KERNEL);
3789 cm_dev->port[i-1] = port;
3790 port->cm_dev = cm_dev;
3793 ret = cm_create_port_fs(port);
3797 port->mad_agent = ib_register_mad_agent(ib_device, i,
3805 if (IS_ERR(port->mad_agent))
3808 ret = ib_modify_port(ib_device, i, 0, &port_modify);
3812 ib_set_client_data(ib_device, &cm_client, cm_dev);
3814 write_lock_irqsave(&cm.device_lock, flags);
3815 list_add_tail(&cm_dev->list, &cm.device_list);
3816 write_unlock_irqrestore(&cm.device_lock, flags);
3820 ib_unregister_mad_agent(port->mad_agent);
3822 cm_remove_port_fs(port);
3824 port_modify.set_port_cap_mask = 0;
3825 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3827 port = cm_dev->port[i-1];
3828 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
3829 ib_unregister_mad_agent(port->mad_agent);
3830 cm_remove_port_fs(port);
3832 device_unregister(cm_dev->device);
3836 static void cm_remove_one(struct ib_device *ib_device)
3838 struct cm_device *cm_dev;
3839 struct cm_port *port;
3840 struct ib_port_modify port_modify = {
3841 .clr_port_cap_mask = IB_PORT_CM_SUP
3843 unsigned long flags;
3846 cm_dev = ib_get_client_data(ib_device, &cm_client);
3850 write_lock_irqsave(&cm.device_lock, flags);
3851 list_del(&cm_dev->list);
3852 write_unlock_irqrestore(&cm.device_lock, flags);
3854 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
3855 port = cm_dev->port[i-1];
3856 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
3857 ib_unregister_mad_agent(port->mad_agent);
3858 flush_workqueue(cm.wq);
3859 cm_remove_port_fs(port);
3861 device_unregister(cm_dev->device);
3865 static int __init ib_cm_init(void)
3869 memset(&cm, 0, sizeof cm);
3870 INIT_LIST_HEAD(&cm.device_list);
3871 rwlock_init(&cm.device_lock);
3872 spin_lock_init(&cm.lock);
3873 cm.listen_service_table = RB_ROOT;
3874 cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3875 cm.remote_id_table = RB_ROOT;
3876 cm.remote_qp_table = RB_ROOT;
3877 cm.remote_sidr_table = RB_ROOT;
3878 idr_init(&cm.local_id_table);
3879 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
3880 INIT_LIST_HEAD(&cm.timewait_list);
3882 ret = class_register(&cm_class);
3888 cm.wq = create_workqueue("ib_cm");
3894 ret = ib_register_client(&cm_client);
3900 destroy_workqueue(cm.wq);
3902 class_unregister(&cm_class);
3904 idr_destroy(&cm.local_id_table);
3908 static void __exit ib_cm_cleanup(void)
3910 struct cm_timewait_info *timewait_info, *tmp;
3912 spin_lock_irq(&cm.lock);
3913 list_for_each_entry(timewait_info, &cm.timewait_list, list)
3914 cancel_delayed_work(&timewait_info->work.work);
3915 spin_unlock_irq(&cm.lock);
3917 ib_unregister_client(&cm_client);
3918 destroy_workqueue(cm.wq);
3920 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
3921 list_del(&timewait_info->list);
3922 kfree(timewait_info);
3925 class_unregister(&cm_class);
3926 idr_destroy(&cm.local_id_table);
3929 module_init(ib_cm_init);
3930 module_exit(ib_cm_cleanup);