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[IB] ucm: 32/64 compatibility fixes
[deliverable/linux.git] / drivers / infiniband / core / cm.c
CommitLineData
a977049d
HR		 1/*
2 * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
6 *
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:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
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.
25 *
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
33 * SOFTWARE.
34 *
35 * $Id: cm.c 2821 2005-07-08 17:07:28Z sean.hefty $
36 */
37#include <linux/dma-mapping.h>
38#include <linux/err.h>
39#include <linux/idr.h>
40#include <linux/interrupt.h>
41#include <linux/pci.h>
42#include <linux/rbtree.h>
43#include <linux/spinlock.h>
44#include <linux/workqueue.h>
45
a4d61e84
RD		 46#include <rdma/ib_cache.h>
47#include <rdma/ib_cm.h>
a977049d
HR		 48#include "cm_msgs.h"
49
50MODULE_AUTHOR("Sean Hefty");
51MODULE_DESCRIPTION("InfiniBand CM");
52MODULE_LICENSE("Dual BSD/GPL");
53
54static void cm_add_one(struct ib_device *device);
55static void cm_remove_one(struct ib_device *device);
56
57static struct ib_client cm_client = {
58 .name = "cm",
59 .add = cm_add_one,
60 .remove = cm_remove_one
61};
62
63static struct ib_cm {
64 spinlock_t lock;
65 struct list_head device_list;
66 rwlock_t device_lock;
67 struct rb_root listen_service_table;
68 u64 listen_service_id;
69 /* struct rb_root peer_service_table; todo: fix peer to peer */
70 struct rb_root remote_qp_table;
71 struct rb_root remote_id_table;
72 struct rb_root remote_sidr_table;
73 struct idr local_id_table;
74 struct workqueue_struct *wq;
75} cm;
76
77struct cm_port {
78 struct cm_device *cm_dev;
79 struct ib_mad_agent *mad_agent;
80 u8 port_num;
81};
82
83struct cm_device {
84 struct list_head list;
85 struct ib_device *device;
97f52eb4 86 __be64 ca_guid;
a977049d
HR		 87 struct cm_port port[0];
88};
89
90struct cm_av {
91 struct cm_port *port;
92 union ib_gid dgid;
93 struct ib_ah_attr ah_attr;
94 u16 pkey_index;
95 u8 packet_life_time;
96};
97
98struct cm_work {
99 struct work_struct work;
100 struct list_head list;
101 struct cm_port *port;
102 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
97f52eb4
SH		 103 __be32 local_id; /* Established / timewait */
104 __be32 remote_id;
a977049d
HR		 105 struct ib_cm_event cm_event;
106 struct ib_sa_path_rec path[0];
107};
108
109struct cm_timewait_info {
110 struct cm_work work; /* Must be first. */
111 struct rb_node remote_qp_node;
112 struct rb_node remote_id_node;
97f52eb4
SH		 113 __be64 remote_ca_guid;
114 __be32 remote_qpn;
a977049d
HR		 115 u8 inserted_remote_qp;
116 u8 inserted_remote_id;
117};
118
119struct cm_id_private {
120 struct ib_cm_id id;
121
122 struct rb_node service_node;
123 struct rb_node sidr_id_node;
124 spinlock_t lock;
125 wait_queue_head_t wait;
126 atomic_t refcount;
127
128 struct ib_mad_send_buf *msg;
129 struct cm_timewait_info *timewait_info;
130 /* todo: use alternate port on send failure */
131 struct cm_av av;
132 struct cm_av alt_av;
133
134 void *private_data;
97f52eb4
SH		 135 __be64 tid;
136 __be32 local_qpn;
137 __be32 remote_qpn;
ae7971a7 138 enum ib_qp_type qp_type;
97f52eb4
SH		 139 __be32 sq_psn;
140 __be32 rq_psn;
a977049d
HR		 141 int timeout_ms;
142 enum ib_mtu path_mtu;
143 u8 private_data_len;
144 u8 max_cm_retries;
145 u8 peer_to_peer;
146 u8 responder_resources;
147 u8 initiator_depth;
148 u8 local_ack_timeout;
149 u8 retry_count;
150 u8 rnr_retry_count;
151 u8 service_timeout;
152
153 struct list_head work_list;
154 atomic_t work_count;
155};
156
157static void cm_work_handler(void *data);
158
159static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
160{
161 if (atomic_dec_and_test(&cm_id_priv->refcount))
162 wake_up(&cm_id_priv->wait);
163}
164
165static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
166 struct ib_mad_send_buf **msg)
167{
168 struct ib_mad_agent *mad_agent;
169 struct ib_mad_send_buf *m;
170 struct ib_ah *ah;
171
172 mad_agent = cm_id_priv->av.port->mad_agent;
173 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
174 if (IS_ERR(ah))
175 return PTR_ERR(ah);
176
354ba39c
JK		 177 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
178 cm_id_priv->av.pkey_index,
34816ad9 179 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 180 GFP_ATOMIC);
181 if (IS_ERR(m)) {
182 ib_destroy_ah(ah);
183 return PTR_ERR(m);
184 }
185
186 /* Timeout set by caller if response is expected. */
34816ad9
SH		 187 m->ah = ah;
188 m->retries = cm_id_priv->max_cm_retries;
a977049d
HR		 189
190 atomic_inc(&cm_id_priv->refcount);
191 m->context[0] = cm_id_priv;
192 *msg = m;
193 return 0;
194}
195
196static int cm_alloc_response_msg(struct cm_port *port,
197 struct ib_mad_recv_wc *mad_recv_wc,
198 struct ib_mad_send_buf **msg)
199{
200 struct ib_mad_send_buf *m;
201 struct ib_ah *ah;
202
203 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
204 mad_recv_wc->recv_buf.grh, port->port_num);
205 if (IS_ERR(ah))
206 return PTR_ERR(ah);
207
208 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
34816ad9 209 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 210 GFP_ATOMIC);
211 if (IS_ERR(m)) {
212 ib_destroy_ah(ah);
213 return PTR_ERR(m);
214 }
34816ad9 215 m->ah = ah;
a977049d
HR		 216 *msg = m;
217 return 0;
218}
219
220static void cm_free_msg(struct ib_mad_send_buf *msg)
221{
34816ad9 222 ib_destroy_ah(msg->ah);
a977049d
HR		 223 if (msg->context[0])
224 cm_deref_id(msg->context[0]);
225 ib_free_send_mad(msg);
226}
227
228static void * cm_copy_private_data(const void *private_data,
229 u8 private_data_len)
230{
231 void *data;
232
233 if (!private_data || !private_data_len)
234 return NULL;
235
236 data = kmalloc(private_data_len, GFP_KERNEL);
237 if (!data)
238 return ERR_PTR(-ENOMEM);
239
240 memcpy(data, private_data, private_data_len);
241 return data;
242}
243
244static void cm_set_private_data(struct cm_id_private *cm_id_priv,
245 void *private_data, u8 private_data_len)
246{
247 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
248 kfree(cm_id_priv->private_data);
249
250 cm_id_priv->private_data = private_data;
251 cm_id_priv->private_data_len = private_data_len;
252}
253
254static void cm_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num,
255 u16 dlid, u8 sl, u16 src_path_bits)
256{
257 memset(ah_attr, 0, sizeof ah_attr);
97f52eb4 258 ah_attr->dlid = dlid;
a977049d
HR		 259 ah_attr->sl = sl;
260 ah_attr->src_path_bits = src_path_bits;
261 ah_attr->port_num = port_num;
262}
263
264static void cm_init_av_for_response(struct cm_port *port,
265 struct ib_wc *wc, struct cm_av *av)
266{
267 av->port = port;
268 av->pkey_index = wc->pkey_index;
97f52eb4 269 cm_set_ah_attr(&av->ah_attr, port->port_num, wc->slid,
a977049d
HR		 270 wc->sl, wc->dlid_path_bits);
271}
272
273static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
274{
275 struct cm_device *cm_dev;
276 struct cm_port *port = NULL;
277 unsigned long flags;
278 int ret;
279 u8 p;
280
281 read_lock_irqsave(&cm.device_lock, flags);
282 list_for_each_entry(cm_dev, &cm.device_list, list) {
283 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
284 &p, NULL)) {
285 port = &cm_dev->port[p-1];
286 break;
287 }
288 }
289 read_unlock_irqrestore(&cm.device_lock, flags);
290
291 if (!port)
292 return -EINVAL;
293
294 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
295 be16_to_cpu(path->pkey), &av->pkey_index);
296 if (ret)
297 return ret;
298
299 av->port = port;
97f52eb4
SH		 300 cm_set_ah_attr(&av->ah_attr, av->port->port_num,
301 be16_to_cpu(path->dlid), path->sl,
302 be16_to_cpu(path->slid) & 0x7F);
a977049d
HR		 303 av->packet_life_time = path->packet_life_time;
304 return 0;
305}
306
307static int cm_alloc_id(struct cm_id_private *cm_id_priv)
308{
309 unsigned long flags;
310 int ret;
311
312 do {
313 spin_lock_irqsave(&cm.lock, flags);
314 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 1,
97f52eb4 315 (__force int *) &cm_id_priv->id.local_id);
a977049d
HR		 316 spin_unlock_irqrestore(&cm.lock, flags);
317 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
318 return ret;
319}
320
97f52eb4 321static void cm_free_id(__be32 local_id)
a977049d
HR		 322{
323 unsigned long flags;
324
325 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 326 idr_remove(&cm.local_id_table, (__force int) local_id);
a977049d
HR		 327 spin_unlock_irqrestore(&cm.lock, flags);
328}
329
97f52eb4 330static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 331{
332 struct cm_id_private *cm_id_priv;
333
97f52eb4 334 cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id);
a977049d
HR		 335 if (cm_id_priv) {
336 if (cm_id_priv->id.remote_id == remote_id)
337 atomic_inc(&cm_id_priv->refcount);
338 else
339 cm_id_priv = NULL;
340 }
341
342 return cm_id_priv;
343}
344
97f52eb4 345static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 346{
347 struct cm_id_private *cm_id_priv;
348 unsigned long flags;
349
350 spin_lock_irqsave(&cm.lock, flags);
351 cm_id_priv = cm_get_id(local_id, remote_id);
352 spin_unlock_irqrestore(&cm.lock, flags);
353
354 return cm_id_priv;
355}
356
357static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
358{
359 struct rb_node **link = &cm.listen_service_table.rb_node;
360 struct rb_node *parent = NULL;
361 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 362 __be64 service_id = cm_id_priv->id.service_id;
363 __be64 service_mask = cm_id_priv->id.service_mask;
a977049d
HR		 364
365 while (*link) {
366 parent = *link;
367 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
368 service_node);
369 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0
SH		 370 (service_mask & cur_cm_id_priv->id.service_id) &&
371 (cm_id_priv->id.device == cur_cm_id_priv->id.device))
372 return cur_cm_id_priv;
373
374 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
375 link = &(*link)->rb_left;
376 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
377 link = &(*link)->rb_right;
378 else if (service_id < cur_cm_id_priv->id.service_id)
a977049d
HR		 379 link = &(*link)->rb_left;
380 else
381 link = &(*link)->rb_right;
382 }
383 rb_link_node(&cm_id_priv->service_node, parent, link);
384 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
385 return NULL;
386}
387
07d357d0
SH		 388static struct cm_id_private * cm_find_listen(struct ib_device *device,
389 __be64 service_id)
a977049d
HR		 390{
391 struct rb_node *node = cm.listen_service_table.rb_node;
392 struct cm_id_private *cm_id_priv;
393
394 while (node) {
395 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
396 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0
SH		 397 cm_id_priv->id.service_id &&
398 (cm_id_priv->id.device == device))
a977049d 399 return cm_id_priv;
07d357d0
SH		 400
401 if (device < cm_id_priv->id.device)
402 node = node->rb_left;
403 else if (device > cm_id_priv->id.device)
404 node = node->rb_right;
405 else if (service_id < cm_id_priv->id.service_id)
a977049d
HR		 406 node = node->rb_left;
407 else
408 node = node->rb_right;
409 }
410 return NULL;
411}
412
413static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
414 *timewait_info)
415{
416 struct rb_node **link = &cm.remote_id_table.rb_node;
417 struct rb_node *parent = NULL;
418 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 419 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
420 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 421
422 while (*link) {
423 parent = *link;
424 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
425 remote_id_node);
426 if (remote_id < cur_timewait_info->work.remote_id)
427 link = &(*link)->rb_left;
428 else if (remote_id > cur_timewait_info->work.remote_id)
429 link = &(*link)->rb_right;
430 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
431 link = &(*link)->rb_left;
432 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
433 link = &(*link)->rb_right;
434 else
435 return cur_timewait_info;
436 }
437 timewait_info->inserted_remote_id = 1;
438 rb_link_node(&timewait_info->remote_id_node, parent, link);
439 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
440 return NULL;
441}
442
97f52eb4
SH		 443static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
444 __be32 remote_id)
a977049d
HR		 445{
446 struct rb_node *node = cm.remote_id_table.rb_node;
447 struct cm_timewait_info *timewait_info;
448
449 while (node) {
450 timewait_info = rb_entry(node, struct cm_timewait_info,
451 remote_id_node);
452 if (remote_id < timewait_info->work.remote_id)
453 node = node->rb_left;
454 else if (remote_id > timewait_info->work.remote_id)
455 node = node->rb_right;
456 else if (remote_ca_guid < timewait_info->remote_ca_guid)
457 node = node->rb_left;
458 else if (remote_ca_guid > timewait_info->remote_ca_guid)
459 node = node->rb_right;
460 else
461 return timewait_info;
462 }
463 return NULL;
464}
465
466static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
467 *timewait_info)
468{
469 struct rb_node **link = &cm.remote_qp_table.rb_node;
470 struct rb_node *parent = NULL;
471 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 472 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
473 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 474
475 while (*link) {
476 parent = *link;
477 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
478 remote_qp_node);
479 if (remote_qpn < cur_timewait_info->remote_qpn)
480 link = &(*link)->rb_left;
481 else if (remote_qpn > cur_timewait_info->remote_qpn)
482 link = &(*link)->rb_right;
483 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
484 link = &(*link)->rb_left;
485 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
486 link = &(*link)->rb_right;
487 else
488 return cur_timewait_info;
489 }
490 timewait_info->inserted_remote_qp = 1;
491 rb_link_node(&timewait_info->remote_qp_node, parent, link);
492 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
493 return NULL;
494}
495
496static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
497 *cm_id_priv)
498{
499 struct rb_node **link = &cm.remote_sidr_table.rb_node;
500 struct rb_node *parent = NULL;
501 struct cm_id_private *cur_cm_id_priv;
502 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 503 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 504
505 while (*link) {
506 parent = *link;
507 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
508 sidr_id_node);
509 if (remote_id < cur_cm_id_priv->id.remote_id)
510 link = &(*link)->rb_left;
511 else if (remote_id > cur_cm_id_priv->id.remote_id)
512 link = &(*link)->rb_right;
513 else {
514 int cmp;
515 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
516 sizeof *port_gid);
517 if (cmp < 0)
518 link = &(*link)->rb_left;
519 else if (cmp > 0)
520 link = &(*link)->rb_right;
521 else
522 return cur_cm_id_priv;
523 }
524 }
525 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
526 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
527 return NULL;
528}
529
530static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
531 enum ib_cm_sidr_status status)
532{
533 struct ib_cm_sidr_rep_param param;
534
535 memset(&param, 0, sizeof param);
536 param.status = status;
537 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
538}
539
07d357d0
SH		 540struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
541 ib_cm_handler cm_handler,
a977049d
HR		 542 void *context)
543{
544 struct cm_id_private *cm_id_priv;
545 int ret;
546
547 cm_id_priv = kmalloc(sizeof *cm_id_priv, GFP_KERNEL);
548 if (!cm_id_priv)
549 return ERR_PTR(-ENOMEM);
550
551 memset(cm_id_priv, 0, sizeof *cm_id_priv);
552 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 553 cm_id_priv->id.device = device;
a977049d
HR		 554 cm_id_priv->id.cm_handler = cm_handler;
555 cm_id_priv->id.context = context;
354ba39c 556 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 557 ret = cm_alloc_id(cm_id_priv);
558 if (ret)
559 goto error;
560
561 spin_lock_init(&cm_id_priv->lock);
562 init_waitqueue_head(&cm_id_priv->wait);
563 INIT_LIST_HEAD(&cm_id_priv->work_list);
564 atomic_set(&cm_id_priv->work_count, -1);
565 atomic_set(&cm_id_priv->refcount, 1);
566 return &cm_id_priv->id;
567
568error:
569 kfree(cm_id_priv);
570 return ERR_PTR(-ENOMEM);
571}
572EXPORT_SYMBOL(ib_create_cm_id);
573
574static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
575{
576 struct cm_work *work;
577
578 if (list_empty(&cm_id_priv->work_list))
579 return NULL;
580
581 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
582 list_del(&work->list);
583 return work;
584}
585
586static void cm_free_work(struct cm_work *work)
587{
588 if (work->mad_recv_wc)
589 ib_free_recv_mad(work->mad_recv_wc);
590 kfree(work);
591}
592
593static inline int cm_convert_to_ms(int iba_time)
594{
595 /* approximate conversion to ms from 4.096us x 2^iba_time */
596 return 1 << max(iba_time - 8, 0);
597}
598
599static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
600{
601 unsigned long flags;
602
603 if (!timewait_info->inserted_remote_id &&
604 !timewait_info->inserted_remote_qp)
605 return;
606
607 spin_lock_irqsave(&cm.lock, flags);
608 if (timewait_info->inserted_remote_id) {
609 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
610 timewait_info->inserted_remote_id = 0;
611 }
612
613 if (timewait_info->inserted_remote_qp) {
614 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
615 timewait_info->inserted_remote_qp = 0;
616 }
617 spin_unlock_irqrestore(&cm.lock, flags);
618}
619
97f52eb4 620static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 621{
622 struct cm_timewait_info *timewait_info;
623
624 timewait_info = kmalloc(sizeof *timewait_info, GFP_KERNEL);
625 if (!timewait_info)
626 return ERR_PTR(-ENOMEM);
627 memset(timewait_info, 0, sizeof *timewait_info);
628
629 timewait_info->work.local_id = local_id;
630 INIT_WORK(&timewait_info->work.work, cm_work_handler,
631 &timewait_info->work);
632 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
633 return timewait_info;
634}
635
636static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
637{
638 int wait_time;
639
640 /*
641 * The cm_id could be destroyed by the user before we exit timewait.
642 * To protect against this, we search for the cm_id after exiting
643 * timewait before notifying the user that we've exited timewait.
644 */
645 cm_id_priv->id.state = IB_CM_TIMEWAIT;
646 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
647 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
648 msecs_to_jiffies(wait_time));
649 cm_id_priv->timewait_info = NULL;
650}
651
652static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
653{
654 cm_id_priv->id.state = IB_CM_IDLE;
655 if (cm_id_priv->timewait_info) {
656 cm_cleanup_timewait(cm_id_priv->timewait_info);
657 kfree(cm_id_priv->timewait_info);
658 cm_id_priv->timewait_info = NULL;
659 }
660}
661
662void ib_destroy_cm_id(struct ib_cm_id *cm_id)
663{
664 struct cm_id_private *cm_id_priv;
665 struct cm_work *work;
666 unsigned long flags;
667
668 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
669retest:
670 spin_lock_irqsave(&cm_id_priv->lock, flags);
671 switch (cm_id->state) {
672 case IB_CM_LISTEN:
673 cm_id->state = IB_CM_IDLE;
674 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
675 spin_lock_irqsave(&cm.lock, flags);
676 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
677 spin_unlock_irqrestore(&cm.lock, flags);
678 break;
679 case IB_CM_SIDR_REQ_SENT:
680 cm_id->state = IB_CM_IDLE;
34816ad9 681 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 682 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
683 break;
684 case IB_CM_SIDR_REQ_RCVD:
685 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
686 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
687 break;
688 case IB_CM_REQ_SENT:
689 case IB_CM_MRA_REQ_RCVD:
690 case IB_CM_REP_SENT:
691 case IB_CM_MRA_REP_RCVD:
34816ad9 692 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 693 /* Fall through */
694 case IB_CM_REQ_RCVD:
695 case IB_CM_MRA_REQ_SENT:
696 case IB_CM_REP_RCVD:
697 case IB_CM_MRA_REP_SENT:
698 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
699 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
700 &cm_id_priv->av.port->cm_dev->ca_guid,
701 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
702 NULL, 0);
703 break;
704 case IB_CM_ESTABLISHED:
705 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
706 ib_send_cm_dreq(cm_id, NULL, 0);
707 goto retest;
708 case IB_CM_DREQ_SENT:
34816ad9 709 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 710 cm_enter_timewait(cm_id_priv);
711 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
712 break;
713 case IB_CM_DREQ_RCVD:
714 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
715 ib_send_cm_drep(cm_id, NULL, 0);
716 break;
717 default:
718 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
719 break;
720 }
721
722 cm_free_id(cm_id->local_id);
723 atomic_dec(&cm_id_priv->refcount);
724 wait_event(cm_id_priv->wait, !atomic_read(&cm_id_priv->refcount));
725 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
726 cm_free_work(work);
727 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
728 kfree(cm_id_priv->private_data);
729 kfree(cm_id_priv);
730}
731EXPORT_SYMBOL(ib_destroy_cm_id);
732
733int ib_cm_listen(struct ib_cm_id *cm_id,
97f52eb4
SH		 734 __be64 service_id,
735 __be64 service_mask)
a977049d
HR		 736{
737 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
738 unsigned long flags;
739 int ret = 0;
740
97f52eb4
SH		 741 service_mask = service_mask ? service_mask :
742 __constant_cpu_to_be64(~0ULL);
a977049d
HR		 743 service_id &= service_mask;
744 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
745 (service_id != IB_CM_ASSIGN_SERVICE_ID))
746 return -EINVAL;
747
748 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
749 BUG_ON(cm_id->state != IB_CM_IDLE);
750
751 cm_id->state = IB_CM_LISTEN;
752
753 spin_lock_irqsave(&cm.lock, flags);
754 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
97f52eb4
SH		 755 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
756 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 757 } else {
758 cm_id->service_id = service_id;
759 cm_id->service_mask = service_mask;
760 }
761 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
762 spin_unlock_irqrestore(&cm.lock, flags);
763
764 if (cur_cm_id_priv) {
765 cm_id->state = IB_CM_IDLE;
766 ret = -EBUSY;
767 }
768 return ret;
769}
770EXPORT_SYMBOL(ib_cm_listen);
771
97f52eb4
SH		 772static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
773 enum cm_msg_sequence msg_seq)
a977049d
HR		 774{
775 u64 hi_tid, low_tid;
776
777 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
97f52eb4
SH		 778 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
779 (msg_seq << 30));
a977049d
HR		 780 return cpu_to_be64(hi_tid | low_tid);
781}
782
783static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 784 __be16 attr_id, __be64 tid)
a977049d
HR		 785{
786 hdr->base_version = IB_MGMT_BASE_VERSION;
787 hdr->mgmt_class = IB_MGMT_CLASS_CM;
788 hdr->class_version = IB_CM_CLASS_VERSION;
789 hdr->method = IB_MGMT_METHOD_SEND;
790 hdr->attr_id = attr_id;
791 hdr->tid = tid;
792}
793
794static void cm_format_req(struct cm_req_msg *req_msg,
795 struct cm_id_private *cm_id_priv,
796 struct ib_cm_req_param *param)
797{
798 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
799 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
800
801 req_msg->local_comm_id = cm_id_priv->id.local_id;
802 req_msg->service_id = param->service_id;
803 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
804 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
805 cm_req_set_resp_res(req_msg, param->responder_resources);
806 cm_req_set_init_depth(req_msg, param->initiator_depth);
807 cm_req_set_remote_resp_timeout(req_msg,
808 param->remote_cm_response_timeout);
809 cm_req_set_qp_type(req_msg, param->qp_type);
810 cm_req_set_flow_ctrl(req_msg, param->flow_control);
811 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
812 cm_req_set_local_resp_timeout(req_msg,
813 param->local_cm_response_timeout);
814 cm_req_set_retry_count(req_msg, param->retry_count);
815 req_msg->pkey = param->primary_path->pkey;
816 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
817 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
818 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
819 cm_req_set_srq(req_msg, param->srq);
820
821 req_msg->primary_local_lid = param->primary_path->slid;
822 req_msg->primary_remote_lid = param->primary_path->dlid;
823 req_msg->primary_local_gid = param->primary_path->sgid;
824 req_msg->primary_remote_gid = param->primary_path->dgid;
825 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
826 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
827 req_msg->primary_traffic_class = param->primary_path->traffic_class;
828 req_msg->primary_hop_limit = param->primary_path->hop_limit;
829 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
830 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
831 cm_req_set_primary_local_ack_timeout(req_msg,
832 min(31, param->primary_path->packet_life_time + 1));
833
834 if (param->alternate_path) {
835 req_msg->alt_local_lid = param->alternate_path->slid;
836 req_msg->alt_remote_lid = param->alternate_path->dlid;
837 req_msg->alt_local_gid = param->alternate_path->sgid;
838 req_msg->alt_remote_gid = param->alternate_path->dgid;
839 cm_req_set_alt_flow_label(req_msg,
840 param->alternate_path->flow_label);
841 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
842 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
843 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
844 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
845 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
846 cm_req_set_alt_local_ack_timeout(req_msg,
847 min(31, param->alternate_path->packet_life_time + 1));
848 }
849
850 if (param->private_data && param->private_data_len)
851 memcpy(req_msg->private_data, param->private_data,
852 param->private_data_len);
853}
854
855static inline int cm_validate_req_param(struct ib_cm_req_param *param)
856{
857 /* peer-to-peer not supported */
858 if (param->peer_to_peer)
859 return -EINVAL;
860
861 if (!param->primary_path)
862 return -EINVAL;
863
864 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
865 return -EINVAL;
866
867 if (param->private_data &&
868 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
869 return -EINVAL;
870
871 if (param->alternate_path &&
872 (param->alternate_path->pkey != param->primary_path->pkey ||
873 param->alternate_path->mtu != param->primary_path->mtu))
874 return -EINVAL;
875
876 return 0;
877}
878
879int ib_send_cm_req(struct ib_cm_id *cm_id,
880 struct ib_cm_req_param *param)
881{
882 struct cm_id_private *cm_id_priv;
a977049d
HR		 883 struct cm_req_msg *req_msg;
884 unsigned long flags;
885 int ret;
886
887 ret = cm_validate_req_param(param);
888 if (ret)
889 return ret;
890
891 /* Verify that we're not in timewait. */
892 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
893 spin_lock_irqsave(&cm_id_priv->lock, flags);
894 if (cm_id->state != IB_CM_IDLE) {
895 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
896 ret = -EINVAL;
897 goto out;
898 }
899 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
900
901 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
902 id.local_id);
903 if (IS_ERR(cm_id_priv->timewait_info))
904 goto out;
905
906 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
907 if (ret)
908 goto error1;
909 if (param->alternate_path) {
910 ret = cm_init_av_by_path(param->alternate_path,
911 &cm_id_priv->alt_av);
912 if (ret)
913 goto error1;
914 }
915 cm_id->service_id = param->service_id;
97f52eb4 916 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 917 cm_id_priv->timeout_ms = cm_convert_to_ms(
918 param->primary_path->packet_life_time) * 2 +
919 cm_convert_to_ms(
920 param->remote_cm_response_timeout);
921 cm_id_priv->max_cm_retries = param->max_cm_retries;
922 cm_id_priv->initiator_depth = param->initiator_depth;
923 cm_id_priv->responder_resources = param->responder_resources;
924 cm_id_priv->retry_count = param->retry_count;
925 cm_id_priv->path_mtu = param->primary_path->mtu;
ae7971a7 926 cm_id_priv->qp_type = param->qp_type;
a977049d
HR		 927
928 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
929 if (ret)
930 goto error1;
931
932 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
933 cm_format_req(req_msg, cm_id_priv, param);
934 cm_id_priv->tid = req_msg->hdr.tid;
34816ad9 935 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 936 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
937
938 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
939 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
940 cm_id_priv->local_ack_timeout =
941 cm_req_get_primary_local_ack_timeout(req_msg);
942
943 spin_lock_irqsave(&cm_id_priv->lock, flags);
34816ad9 944 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
a977049d
HR		 945 if (ret) {
946 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
947 goto error2;
948 }
949 BUG_ON(cm_id->state != IB_CM_IDLE);
950 cm_id->state = IB_CM_REQ_SENT;
951 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
952 return 0;
953
954error2: cm_free_msg(cm_id_priv->msg);
955error1: kfree(cm_id_priv->timewait_info);
956out: return ret;
957}
958EXPORT_SYMBOL(ib_send_cm_req);
959
960static int cm_issue_rej(struct cm_port *port,
961 struct ib_mad_recv_wc *mad_recv_wc,
962 enum ib_cm_rej_reason reason,
963 enum cm_msg_response msg_rejected,
964 void *ari, u8 ari_length)
965{
966 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 967 struct cm_rej_msg *rej_msg, *rcv_msg;
968 int ret;
969
970 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
971 if (ret)
972 return ret;
973
974 /* We just need common CM header information. Cast to any message. */
975 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
976 rej_msg = (struct cm_rej_msg *) msg->mad;
977
978 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
979 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
980 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
981 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 982 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 983
984 if (ari && ari_length) {
985 cm_rej_set_reject_info_len(rej_msg, ari_length);
986 memcpy(rej_msg->ari, ari, ari_length);
987 }
988
34816ad9 989 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 990 if (ret)
991 cm_free_msg(msg);
992
993 return ret;
994}
995
97f52eb4
SH		 996static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
997 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 998{
999 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1000 ((local_ca_guid == remote_ca_guid) &&
1001 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1002}
1003
1004static inline void cm_format_paths_from_req(struct cm_req_msg *req_msg,
1005 struct ib_sa_path_rec *primary_path,
1006 struct ib_sa_path_rec *alt_path)
1007{
1008 memset(primary_path, 0, sizeof *primary_path);
1009 primary_path->dgid = req_msg->primary_local_gid;
1010 primary_path->sgid = req_msg->primary_remote_gid;
1011 primary_path->dlid = req_msg->primary_local_lid;
1012 primary_path->slid = req_msg->primary_remote_lid;
1013 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1014 primary_path->hop_limit = req_msg->primary_hop_limit;
1015 primary_path->traffic_class = req_msg->primary_traffic_class;
1016 primary_path->reversible = 1;
1017 primary_path->pkey = req_msg->pkey;
1018 primary_path->sl = cm_req_get_primary_sl(req_msg);
1019 primary_path->mtu_selector = IB_SA_EQ;
1020 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1021 primary_path->rate_selector = IB_SA_EQ;
1022 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1023 primary_path->packet_life_time_selector = IB_SA_EQ;
1024 primary_path->packet_life_time =
1025 cm_req_get_primary_local_ack_timeout(req_msg);
1026 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1027
1028 if (req_msg->alt_local_lid) {
1029 memset(alt_path, 0, sizeof *alt_path);
1030 alt_path->dgid = req_msg->alt_local_gid;
1031 alt_path->sgid = req_msg->alt_remote_gid;
1032 alt_path->dlid = req_msg->alt_local_lid;
1033 alt_path->slid = req_msg->alt_remote_lid;
1034 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1035 alt_path->hop_limit = req_msg->alt_hop_limit;
1036 alt_path->traffic_class = req_msg->alt_traffic_class;
1037 alt_path->reversible = 1;
1038 alt_path->pkey = req_msg->pkey;
1039 alt_path->sl = cm_req_get_alt_sl(req_msg);
1040 alt_path->mtu_selector = IB_SA_EQ;
1041 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1042 alt_path->rate_selector = IB_SA_EQ;
1043 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1044 alt_path->packet_life_time_selector = IB_SA_EQ;
1045 alt_path->packet_life_time =
1046 cm_req_get_alt_local_ack_timeout(req_msg);
1047 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1048 }
1049}
1050
1051static void cm_format_req_event(struct cm_work *work,
1052 struct cm_id_private *cm_id_priv,
1053 struct ib_cm_id *listen_id)
1054{
1055 struct cm_req_msg *req_msg;
1056 struct ib_cm_req_event_param *param;
1057
1058 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1059 param = &work->cm_event.param.req_rcvd;
1060 param->listen_id = listen_id;
a977049d
HR		 1061 param->port = cm_id_priv->av.port->port_num;
1062 param->primary_path = &work->path[0];
1063 if (req_msg->alt_local_lid)
1064 param->alternate_path = &work->path[1];
1065 else
1066 param->alternate_path = NULL;
1067 param->remote_ca_guid = req_msg->local_ca_guid;
1068 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1069 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1070 param->qp_type = cm_req_get_qp_type(req_msg);
1071 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1072 param->responder_resources = cm_req_get_init_depth(req_msg);
1073 param->initiator_depth = cm_req_get_resp_res(req_msg);
1074 param->local_cm_response_timeout =
1075 cm_req_get_remote_resp_timeout(req_msg);
1076 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1077 param->remote_cm_response_timeout =
1078 cm_req_get_local_resp_timeout(req_msg);
1079 param->retry_count = cm_req_get_retry_count(req_msg);
1080 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1081 param->srq = cm_req_get_srq(req_msg);
1082 work->cm_event.private_data = &req_msg->private_data;
1083}
1084
1085static void cm_process_work(struct cm_id_private *cm_id_priv,
1086 struct cm_work *work)
1087{
1088 unsigned long flags;
1089 int ret;
1090
1091 /* We will typically only have the current event to report. */
1092 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1093 cm_free_work(work);
1094
1095 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1096 spin_lock_irqsave(&cm_id_priv->lock, flags);
1097 work = cm_dequeue_work(cm_id_priv);
1098 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1099 BUG_ON(!work);
1100 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1101 &work->cm_event);
1102 cm_free_work(work);
1103 }
1104 cm_deref_id(cm_id_priv);
1105 if (ret)
1106 ib_destroy_cm_id(&cm_id_priv->id);
1107}
1108
1109static void cm_format_mra(struct cm_mra_msg *mra_msg,
1110 struct cm_id_private *cm_id_priv,
1111 enum cm_msg_response msg_mraed, u8 service_timeout,
1112 const void *private_data, u8 private_data_len)
1113{
1114 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1115 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1116 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1117 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1118 cm_mra_set_service_timeout(mra_msg, service_timeout);
1119
1120 if (private_data && private_data_len)
1121 memcpy(mra_msg->private_data, private_data, private_data_len);
1122}
1123
1124static void cm_format_rej(struct cm_rej_msg *rej_msg,
1125 struct cm_id_private *cm_id_priv,
1126 enum ib_cm_rej_reason reason,
1127 void *ari,
1128 u8 ari_length,
1129 const void *private_data,
1130 u8 private_data_len)
1131{
1132 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1133 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1134
1135 switch(cm_id_priv->id.state) {
1136 case IB_CM_REQ_RCVD:
1137 rej_msg->local_comm_id = 0;
1138 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1139 break;
1140 case IB_CM_MRA_REQ_SENT:
1141 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1142 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1143 break;
1144 case IB_CM_REP_RCVD:
1145 case IB_CM_MRA_REP_SENT:
1146 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1147 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1148 break;
1149 default:
1150 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1151 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1152 break;
1153 }
1154
97f52eb4 1155 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1156 if (ari && ari_length) {
1157 cm_rej_set_reject_info_len(rej_msg, ari_length);
1158 memcpy(rej_msg->ari, ari, ari_length);
1159 }
1160
1161 if (private_data && private_data_len)
1162 memcpy(rej_msg->private_data, private_data, private_data_len);
1163}
1164
1165static void cm_dup_req_handler(struct cm_work *work,
1166 struct cm_id_private *cm_id_priv)
1167{
1168 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1169 unsigned long flags;
1170 int ret;
1171
1172 /* Quick state check to discard duplicate REQs. */
1173 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1174 return;
1175
1176 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1177 if (ret)
1178 return;
1179
1180 spin_lock_irqsave(&cm_id_priv->lock, flags);
1181 switch (cm_id_priv->id.state) {
1182 case IB_CM_MRA_REQ_SENT:
1183 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1184 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1185 cm_id_priv->private_data,
1186 cm_id_priv->private_data_len);
1187 break;
1188 case IB_CM_TIMEWAIT:
1189 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1190 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1191 break;
1192 default:
1193 goto unlock;
1194 }
1195 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1196
34816ad9 1197 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1198 if (ret)
1199 goto free;
1200 return;
1201
1202unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1203free: cm_free_msg(msg);
1204}
1205
1206static struct cm_id_private * cm_match_req(struct cm_work *work,
1207 struct cm_id_private *cm_id_priv)
1208{
1209 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1210 struct cm_timewait_info *timewait_info;
1211 struct cm_req_msg *req_msg;
1212 unsigned long flags;
1213
1214 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1215
1216 /* Check for duplicate REQ and stale connections. */
1217 spin_lock_irqsave(&cm.lock, flags);
1218 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1219 if (!timewait_info)
1220 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1221
1222 if (timewait_info) {
1223 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1224 timewait_info->work.remote_id);
1225 spin_unlock_irqrestore(&cm.lock, flags);
1226 if (cur_cm_id_priv) {
1227 cm_dup_req_handler(work, cur_cm_id_priv);
1228 cm_deref_id(cur_cm_id_priv);
1229 } else
1230 cm_issue_rej(work->port, work->mad_recv_wc,
1231 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1232 NULL, 0);
1233 goto error;
1234 }
1235
1236 /* Find matching listen request. */
07d357d0
SH		 1237 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
1238 req_msg->service_id);
a977049d
HR		 1239 if (!listen_cm_id_priv) {
1240 spin_unlock_irqrestore(&cm.lock, flags);
1241 cm_issue_rej(work->port, work->mad_recv_wc,
1242 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1243 NULL, 0);
1244 goto error;
1245 }
1246 atomic_inc(&listen_cm_id_priv->refcount);
1247 atomic_inc(&cm_id_priv->refcount);
1248 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1249 atomic_inc(&cm_id_priv->work_count);
1250 spin_unlock_irqrestore(&cm.lock, flags);
1251 return listen_cm_id_priv;
1252
1253error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1254 return NULL;
1255}
1256
1257static int cm_req_handler(struct cm_work *work)
1258{
1259 struct ib_cm_id *cm_id;
1260 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1261 struct cm_req_msg *req_msg;
1262 int ret;
1263
1264 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1265
07d357d0 1266 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 1267 if (IS_ERR(cm_id))
1268 return PTR_ERR(cm_id);
1269
1270 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1271 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1272 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
1273 &cm_id_priv->av);
1274 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1275 id.local_id);
1276 if (IS_ERR(cm_id_priv->timewait_info)) {
1277 ret = PTR_ERR(cm_id_priv->timewait_info);
1278 goto error1;
1279 }
1280 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1281 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1282 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1283
1284 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1285 if (!listen_cm_id_priv) {
1286 ret = -EINVAL;
1287 goto error2;
1288 }
1289
1290 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1291 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1292 cm_id_priv->id.service_id = req_msg->service_id;
97f52eb4 1293 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1294
1295 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1296 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1297 if (ret)
1298 goto error3;
1299 if (req_msg->alt_local_lid) {
1300 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1301 if (ret)
1302 goto error3;
1303 }
1304 cm_id_priv->tid = req_msg->hdr.tid;
1305 cm_id_priv->timeout_ms = cm_convert_to_ms(
1306 cm_req_get_local_resp_timeout(req_msg));
1307 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1308 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1309 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1310 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1311 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1312 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1313 cm_id_priv->local_ack_timeout =
1314 cm_req_get_primary_local_ack_timeout(req_msg);
1315 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1316 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
ae7971a7 1317 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
a977049d
HR		 1318
1319 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1320 cm_process_work(cm_id_priv, work);
1321 cm_deref_id(listen_cm_id_priv);
1322 return 0;
1323
1324error3: atomic_dec(&cm_id_priv->refcount);
1325 cm_deref_id(listen_cm_id_priv);
1326 cm_cleanup_timewait(cm_id_priv->timewait_info);
1327error2: kfree(cm_id_priv->timewait_info);
1b205c2d 1328 cm_id_priv->timewait_info = NULL;
a977049d
HR		 1329error1: ib_destroy_cm_id(&cm_id_priv->id);
1330 return ret;
1331}
1332
1333static void cm_format_rep(struct cm_rep_msg *rep_msg,
1334 struct cm_id_private *cm_id_priv,
1335 struct ib_cm_rep_param *param)
1336{
1337 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1338 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1339 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1340 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1341 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1342 rep_msg->resp_resources = param->responder_resources;
1343 rep_msg->initiator_depth = param->initiator_depth;
1344 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1345 cm_rep_set_failover(rep_msg, param->failover_accepted);
1346 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1347 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1348 cm_rep_set_srq(rep_msg, param->srq);
1349 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1350
1351 if (param->private_data && param->private_data_len)
1352 memcpy(rep_msg->private_data, param->private_data,
1353 param->private_data_len);
1354}
1355
1356int ib_send_cm_rep(struct ib_cm_id *cm_id,
1357 struct ib_cm_rep_param *param)
1358{
1359 struct cm_id_private *cm_id_priv;
1360 struct ib_mad_send_buf *msg;
1361 struct cm_rep_msg *rep_msg;
a977049d
HR		 1362 unsigned long flags;
1363 int ret;
1364
1365 if (param->private_data &&
1366 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1367 return -EINVAL;
1368
1369 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1370 spin_lock_irqsave(&cm_id_priv->lock, flags);
1371 if (cm_id->state != IB_CM_REQ_RCVD &&
1372 cm_id->state != IB_CM_MRA_REQ_SENT) {
1373 ret = -EINVAL;
1374 goto out;
1375 }
1376
1377 ret = cm_alloc_msg(cm_id_priv, &msg);
1378 if (ret)
1379 goto out;
1380
1381 rep_msg = (struct cm_rep_msg *) msg->mad;
1382 cm_format_rep(rep_msg, cm_id_priv, param);
34816ad9 1383 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1384 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1385
34816ad9 1386 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1387 if (ret) {
1388 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1389 cm_free_msg(msg);
1390 return ret;
1391 }
1392
1393 cm_id->state = IB_CM_REP_SENT;
1394 cm_id_priv->msg = msg;
1395 cm_id_priv->initiator_depth = param->initiator_depth;
1396 cm_id_priv->responder_resources = param->responder_resources;
1397 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1398 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1399
1400out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1401 return ret;
1402}
1403EXPORT_SYMBOL(ib_send_cm_rep);
1404
1405static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1406 struct cm_id_private *cm_id_priv,
1407 const void *private_data,
1408 u8 private_data_len)
1409{
1410 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1411 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1412 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1413
1414 if (private_data && private_data_len)
1415 memcpy(rtu_msg->private_data, private_data, private_data_len);
1416}
1417
1418int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1419 const void *private_data,
1420 u8 private_data_len)
1421{
1422 struct cm_id_private *cm_id_priv;
1423 struct ib_mad_send_buf *msg;
a977049d
HR		 1424 unsigned long flags;
1425 void *data;
1426 int ret;
1427
1428 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1429 return -EINVAL;
1430
1431 data = cm_copy_private_data(private_data, private_data_len);
1432 if (IS_ERR(data))
1433 return PTR_ERR(data);
1434
1435 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1436 spin_lock_irqsave(&cm_id_priv->lock, flags);
1437 if (cm_id->state != IB_CM_REP_RCVD &&
1438 cm_id->state != IB_CM_MRA_REP_SENT) {
1439 ret = -EINVAL;
1440 goto error;
1441 }
1442
1443 ret = cm_alloc_msg(cm_id_priv, &msg);
1444 if (ret)
1445 goto error;
1446
1447 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1448 private_data, private_data_len);
1449
34816ad9 1450 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1451 if (ret) {
1452 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1453 cm_free_msg(msg);
1454 kfree(data);
1455 return ret;
1456 }
1457
1458 cm_id->state = IB_CM_ESTABLISHED;
1459 cm_set_private_data(cm_id_priv, data, private_data_len);
1460 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1461 return 0;
1462
1463error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1464 kfree(data);
1465 return ret;
1466}
1467EXPORT_SYMBOL(ib_send_cm_rtu);
1468
1469static void cm_format_rep_event(struct cm_work *work)
1470{
1471 struct cm_rep_msg *rep_msg;
1472 struct ib_cm_rep_event_param *param;
1473
1474 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1475 param = &work->cm_event.param.rep_rcvd;
1476 param->remote_ca_guid = rep_msg->local_ca_guid;
1477 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1478 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1479 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1480 param->responder_resources = rep_msg->initiator_depth;
1481 param->initiator_depth = rep_msg->resp_resources;
1482 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1483 param->failover_accepted = cm_rep_get_failover(rep_msg);
1484 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1485 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1486 param->srq = cm_rep_get_srq(rep_msg);
1487 work->cm_event.private_data = &rep_msg->private_data;
1488}
1489
1490static void cm_dup_rep_handler(struct cm_work *work)
1491{
1492 struct cm_id_private *cm_id_priv;
1493 struct cm_rep_msg *rep_msg;
1494 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1495 unsigned long flags;
1496 int ret;
1497
1498 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1499 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1500 rep_msg->local_comm_id);
1501 if (!cm_id_priv)
1502 return;
1503
1504 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1505 if (ret)
1506 goto deref;
1507
1508 spin_lock_irqsave(&cm_id_priv->lock, flags);
1509 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1510 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1511 cm_id_priv->private_data,
1512 cm_id_priv->private_data_len);
1513 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1514 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1515 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1516 cm_id_priv->private_data,
1517 cm_id_priv->private_data_len);
1518 else
1519 goto unlock;
1520 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1521
34816ad9 1522 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1523 if (ret)
1524 goto free;
1525 goto deref;
1526
1527unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1528free: cm_free_msg(msg);
1529deref: cm_deref_id(cm_id_priv);
1530}
1531
1532static int cm_rep_handler(struct cm_work *work)
1533{
1534 struct cm_id_private *cm_id_priv;
1535 struct cm_rep_msg *rep_msg;
1536 unsigned long flags;
1537 int ret;
1538
1539 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1540 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1541 if (!cm_id_priv) {
1542 cm_dup_rep_handler(work);
1543 return -EINVAL;
1544 }
1545
1546 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1547 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1548 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1549
1550 spin_lock_irqsave(&cm.lock, flags);
1551 /* Check for duplicate REP. */
1552 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
1553 spin_unlock_irqrestore(&cm.lock, flags);
1554 ret = -EINVAL;
1555 goto error;
1556 }
1557 /* Check for a stale connection. */
1558 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
1559 spin_unlock_irqrestore(&cm.lock, flags);
1560 cm_issue_rej(work->port, work->mad_recv_wc,
1561 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1562 NULL, 0);
1563 ret = -EINVAL;
1564 goto error;
1565 }
1566 spin_unlock_irqrestore(&cm.lock, flags);
1567
1568 cm_format_rep_event(work);
1569
1570 spin_lock_irqsave(&cm_id_priv->lock, flags);
1571 switch (cm_id_priv->id.state) {
1572 case IB_CM_REQ_SENT:
1573 case IB_CM_MRA_REQ_RCVD:
1574 break;
1575 default:
1576 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1577 ret = -EINVAL;
1578 goto error;
1579 }
1580 cm_id_priv->id.state = IB_CM_REP_RCVD;
1581 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1582 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1583 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1584 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1585 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1586 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1587
1588 /* todo: handle peer_to_peer */
1589
34816ad9 1590 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1591 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1592 if (!ret)
1593 list_add_tail(&work->list, &cm_id_priv->work_list);
1594 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1595
1596 if (ret)
1597 cm_process_work(cm_id_priv, work);
1598 else
1599 cm_deref_id(cm_id_priv);
1600 return 0;
1601
1602error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1603 cm_deref_id(cm_id_priv);
1604 return ret;
1605}
1606
1607static int cm_establish_handler(struct cm_work *work)
1608{
1609 struct cm_id_private *cm_id_priv;
1610 unsigned long flags;
1611 int ret;
1612
1613 /* See comment in ib_cm_establish about lookup. */
1614 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1615 if (!cm_id_priv)
1616 return -EINVAL;
1617
1618 spin_lock_irqsave(&cm_id_priv->lock, flags);
1619 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1620 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1621 goto out;
1622 }
1623
34816ad9 1624 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1625 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1626 if (!ret)
1627 list_add_tail(&work->list, &cm_id_priv->work_list);
1628 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1629
1630 if (ret)
1631 cm_process_work(cm_id_priv, work);
1632 else
1633 cm_deref_id(cm_id_priv);
1634 return 0;
1635out:
1636 cm_deref_id(cm_id_priv);
1637 return -EINVAL;
1638}
1639
1640static int cm_rtu_handler(struct cm_work *work)
1641{
1642 struct cm_id_private *cm_id_priv;
1643 struct cm_rtu_msg *rtu_msg;
1644 unsigned long flags;
1645 int ret;
1646
1647 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1648 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1649 rtu_msg->local_comm_id);
1650 if (!cm_id_priv)
1651 return -EINVAL;
1652
1653 work->cm_event.private_data = &rtu_msg->private_data;
1654
1655 spin_lock_irqsave(&cm_id_priv->lock, flags);
1656 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1657 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1658 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1659 goto out;
1660 }
1661 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1662
34816ad9 1663 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1664 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1665 if (!ret)
1666 list_add_tail(&work->list, &cm_id_priv->work_list);
1667 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1668
1669 if (ret)
1670 cm_process_work(cm_id_priv, work);
1671 else
1672 cm_deref_id(cm_id_priv);
1673 return 0;
1674out:
1675 cm_deref_id(cm_id_priv);
1676 return -EINVAL;
1677}
1678
1679static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1680 struct cm_id_private *cm_id_priv,
1681 const void *private_data,
1682 u8 private_data_len)
1683{
1684 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1685 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1686 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1687 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1688 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1689
1690 if (private_data && private_data_len)
1691 memcpy(dreq_msg->private_data, private_data, private_data_len);
1692}
1693
1694int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1695 const void *private_data,
1696 u8 private_data_len)
1697{
1698 struct cm_id_private *cm_id_priv;
1699 struct ib_mad_send_buf *msg;
a977049d
HR		 1700 unsigned long flags;
1701 int ret;
1702
1703 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1704 return -EINVAL;
1705
1706 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1707 spin_lock_irqsave(&cm_id_priv->lock, flags);
1708 if (cm_id->state != IB_CM_ESTABLISHED) {
1709 ret = -EINVAL;
1710 goto out;
1711 }
1712
1713 ret = cm_alloc_msg(cm_id_priv, &msg);
1714 if (ret) {
1715 cm_enter_timewait(cm_id_priv);
1716 goto out;
1717 }
1718
1719 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1720 private_data, private_data_len);
34816ad9 1721 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1722 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1723
34816ad9 1724 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1725 if (ret) {
1726 cm_enter_timewait(cm_id_priv);
1727 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1728 cm_free_msg(msg);
1729 return ret;
1730 }
1731
1732 cm_id->state = IB_CM_DREQ_SENT;
1733 cm_id_priv->msg = msg;
1734out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1735 return ret;
1736}
1737EXPORT_SYMBOL(ib_send_cm_dreq);
1738
1739static void cm_format_drep(struct cm_drep_msg *drep_msg,
1740 struct cm_id_private *cm_id_priv,
1741 const void *private_data,
1742 u8 private_data_len)
1743{
1744 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1745 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1746 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1747
1748 if (private_data && private_data_len)
1749 memcpy(drep_msg->private_data, private_data, private_data_len);
1750}
1751
1752int ib_send_cm_drep(struct ib_cm_id *cm_id,
1753 const void *private_data,
1754 u8 private_data_len)
1755{
1756 struct cm_id_private *cm_id_priv;
1757 struct ib_mad_send_buf *msg;
a977049d
HR		 1758 unsigned long flags;
1759 void *data;
1760 int ret;
1761
1762 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1763 return -EINVAL;
1764
1765 data = cm_copy_private_data(private_data, private_data_len);
1766 if (IS_ERR(data))
1767 return PTR_ERR(data);
1768
1769 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1770 spin_lock_irqsave(&cm_id_priv->lock, flags);
1771 if (cm_id->state != IB_CM_DREQ_RCVD) {
1772 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1773 kfree(data);
1774 return -EINVAL;
1775 }
1776
1777 cm_set_private_data(cm_id_priv, data, private_data_len);
1778 cm_enter_timewait(cm_id_priv);
1779
1780 ret = cm_alloc_msg(cm_id_priv, &msg);
1781 if (ret)
1782 goto out;
1783
1784 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1785 private_data, private_data_len);
1786
34816ad9 1787 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1788 if (ret) {
1789 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1790 cm_free_msg(msg);
1791 return ret;
1792 }
1793
1794out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1795 return ret;
1796}
1797EXPORT_SYMBOL(ib_send_cm_drep);
1798
1799static int cm_dreq_handler(struct cm_work *work)
1800{
1801 struct cm_id_private *cm_id_priv;
1802 struct cm_dreq_msg *dreq_msg;
1803 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1804 unsigned long flags;
1805 int ret;
1806
1807 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1808 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1809 dreq_msg->local_comm_id);
1810 if (!cm_id_priv)
1811 return -EINVAL;
1812
1813 work->cm_event.private_data = &dreq_msg->private_data;
1814
1815 spin_lock_irqsave(&cm_id_priv->lock, flags);
1816 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1817 goto unlock;
1818
1819 switch (cm_id_priv->id.state) {
1820 case IB_CM_REP_SENT:
1821 case IB_CM_DREQ_SENT:
34816ad9 1822 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1823 break;
1824 case IB_CM_ESTABLISHED:
1825 case IB_CM_MRA_REP_RCVD:
1826 break;
1827 case IB_CM_TIMEWAIT:
1828 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1829 goto unlock;
1830
1831 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1832 cm_id_priv->private_data,
1833 cm_id_priv->private_data_len);
1834 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1835
34816ad9 1836 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 1837 cm_free_msg(msg);
1838 goto deref;
1839 default:
1840 goto unlock;
1841 }
1842 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1843 cm_id_priv->tid = dreq_msg->hdr.tid;
1844 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1845 if (!ret)
1846 list_add_tail(&work->list, &cm_id_priv->work_list);
1847 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1848
1849 if (ret)
1850 cm_process_work(cm_id_priv, work);
1851 else
1852 cm_deref_id(cm_id_priv);
1853 return 0;
1854
1855unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1856deref: cm_deref_id(cm_id_priv);
1857 return -EINVAL;
1858}
1859
1860static int cm_drep_handler(struct cm_work *work)
1861{
1862 struct cm_id_private *cm_id_priv;
1863 struct cm_drep_msg *drep_msg;
1864 unsigned long flags;
1865 int ret;
1866
1867 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
1868 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
1869 drep_msg->local_comm_id);
1870 if (!cm_id_priv)
1871 return -EINVAL;
1872
1873 work->cm_event.private_data = &drep_msg->private_data;
1874
1875 spin_lock_irqsave(&cm_id_priv->lock, flags);
1876 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
1877 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
1878 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1879 goto out;
1880 }
1881 cm_enter_timewait(cm_id_priv);
1882
34816ad9 1883 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1884 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1885 if (!ret)
1886 list_add_tail(&work->list, &cm_id_priv->work_list);
1887 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1888
1889 if (ret)
1890 cm_process_work(cm_id_priv, work);
1891 else
1892 cm_deref_id(cm_id_priv);
1893 return 0;
1894out:
1895 cm_deref_id(cm_id_priv);
1896 return -EINVAL;
1897}
1898
1899int ib_send_cm_rej(struct ib_cm_id *cm_id,
1900 enum ib_cm_rej_reason reason,
1901 void *ari,
1902 u8 ari_length,
1903 const void *private_data,
1904 u8 private_data_len)
1905{
1906 struct cm_id_private *cm_id_priv;
1907 struct ib_mad_send_buf *msg;
a977049d
HR		 1908 unsigned long flags;
1909 int ret;
1910
1911 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
1912 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
1913 return -EINVAL;
1914
1915 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1916
1917 spin_lock_irqsave(&cm_id_priv->lock, flags);
1918 switch (cm_id->state) {
1919 case IB_CM_REQ_SENT:
1920 case IB_CM_MRA_REQ_RCVD:
1921 case IB_CM_REQ_RCVD:
1922 case IB_CM_MRA_REQ_SENT:
1923 case IB_CM_REP_RCVD:
1924 case IB_CM_MRA_REP_SENT:
1925 ret = cm_alloc_msg(cm_id_priv, &msg);
1926 if (!ret)
1927 cm_format_rej((struct cm_rej_msg *) msg->mad,
1928 cm_id_priv, reason, ari, ari_length,
1929 private_data, private_data_len);
1930
1931 cm_reset_to_idle(cm_id_priv);
1932 break;
1933 case IB_CM_REP_SENT:
1934 case IB_CM_MRA_REP_RCVD:
1935 ret = cm_alloc_msg(cm_id_priv, &msg);
1936 if (!ret)
1937 cm_format_rej((struct cm_rej_msg *) msg->mad,
1938 cm_id_priv, reason, ari, ari_length,
1939 private_data, private_data_len);
1940
1941 cm_enter_timewait(cm_id_priv);
1942 break;
1943 default:
1944 ret = -EINVAL;
1945 goto out;
1946 }
1947
1948 if (ret)
1949 goto out;
1950
34816ad9 1951 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1952 if (ret)
1953 cm_free_msg(msg);
1954
1955out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1956 return ret;
1957}
1958EXPORT_SYMBOL(ib_send_cm_rej);
1959
1960static void cm_format_rej_event(struct cm_work *work)
1961{
1962 struct cm_rej_msg *rej_msg;
1963 struct ib_cm_rej_event_param *param;
1964
1965 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
1966 param = &work->cm_event.param.rej_rcvd;
1967 param->ari = rej_msg->ari;
1968 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 1969 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 1970 work->cm_event.private_data = &rej_msg->private_data;
1971}
1972
1973static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
1974{
1975 struct cm_timewait_info *timewait_info;
1976 struct cm_id_private *cm_id_priv;
1977 unsigned long flags;
97f52eb4 1978 __be32 remote_id;
a977049d
HR		 1979
1980 remote_id = rej_msg->local_comm_id;
1981
97f52eb4 1982 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
a977049d 1983 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 1984 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 1985 remote_id);
1986 if (!timewait_info) {
1987 spin_unlock_irqrestore(&cm.lock, flags);
1988 return NULL;
1989 }
1990 cm_id_priv = idr_find(&cm.local_id_table,
97f52eb4 1991 (__force int) timewait_info->work.local_id);
a977049d
HR		 1992 if (cm_id_priv) {
1993 if (cm_id_priv->id.remote_id == remote_id)
1994 atomic_inc(&cm_id_priv->refcount);
1995 else
1996 cm_id_priv = NULL;
1997 }
1998 spin_unlock_irqrestore(&cm.lock, flags);
1999 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2000 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2001 else
2002 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2003
2004 return cm_id_priv;
2005}
2006
2007static int cm_rej_handler(struct cm_work *work)
2008{
2009 struct cm_id_private *cm_id_priv;
2010 struct cm_rej_msg *rej_msg;
2011 unsigned long flags;
2012 int ret;
2013
2014 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2015 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2016 if (!cm_id_priv)
2017 return -EINVAL;
2018
2019 cm_format_rej_event(work);
2020
2021 spin_lock_irqsave(&cm_id_priv->lock, flags);
2022 switch (cm_id_priv->id.state) {
2023 case IB_CM_REQ_SENT:
2024 case IB_CM_MRA_REQ_RCVD:
2025 case IB_CM_REP_SENT:
2026 case IB_CM_MRA_REP_RCVD:
34816ad9 2027 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2028 /* fall through */
2029 case IB_CM_REQ_RCVD:
2030 case IB_CM_MRA_REQ_SENT:
97f52eb4 2031 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2032 cm_enter_timewait(cm_id_priv);
2033 else
2034 cm_reset_to_idle(cm_id_priv);
2035 break;
2036 case IB_CM_DREQ_SENT:
34816ad9 2037 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2038 /* fall through */
2039 case IB_CM_REP_RCVD:
2040 case IB_CM_MRA_REP_SENT:
2041 case IB_CM_ESTABLISHED:
2042 cm_enter_timewait(cm_id_priv);
2043 break;
2044 default:
2045 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2046 ret = -EINVAL;
2047 goto out;
2048 }
2049
2050 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2051 if (!ret)
2052 list_add_tail(&work->list, &cm_id_priv->work_list);
2053 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2054
2055 if (ret)
2056 cm_process_work(cm_id_priv, work);
2057 else
2058 cm_deref_id(cm_id_priv);
2059 return 0;
2060out:
2061 cm_deref_id(cm_id_priv);
2062 return -EINVAL;
2063}
2064
2065int ib_send_cm_mra(struct ib_cm_id *cm_id,
2066 u8 service_timeout,
2067 const void *private_data,
2068 u8 private_data_len)
2069{
2070 struct cm_id_private *cm_id_priv;
2071 struct ib_mad_send_buf *msg;
a977049d
HR		 2072 void *data;
2073 unsigned long flags;
2074 int ret;
2075
2076 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2077 return -EINVAL;
2078
2079 data = cm_copy_private_data(private_data, private_data_len);
2080 if (IS_ERR(data))
2081 return PTR_ERR(data);
2082
2083 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2084
2085 spin_lock_irqsave(&cm_id_priv->lock, flags);
2086 switch(cm_id_priv->id.state) {
2087 case IB_CM_REQ_RCVD:
2088 ret = cm_alloc_msg(cm_id_priv, &msg);
2089 if (ret)
2090 goto error1;
2091
2092 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2093 CM_MSG_RESPONSE_REQ, service_timeout,
2094 private_data, private_data_len);
34816ad9 2095 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2096 if (ret)
2097 goto error2;
2098 cm_id->state = IB_CM_MRA_REQ_SENT;
2099 break;
2100 case IB_CM_REP_RCVD:
2101 ret = cm_alloc_msg(cm_id_priv, &msg);
2102 if (ret)
2103 goto error1;
2104
2105 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2106 CM_MSG_RESPONSE_REP, service_timeout,
2107 private_data, private_data_len);
34816ad9 2108 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2109 if (ret)
2110 goto error2;
2111 cm_id->state = IB_CM_MRA_REP_SENT;
2112 break;
2113 case IB_CM_ESTABLISHED:
2114 ret = cm_alloc_msg(cm_id_priv, &msg);
2115 if (ret)
2116 goto error1;
2117
2118 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2119 CM_MSG_RESPONSE_OTHER, service_timeout,
2120 private_data, private_data_len);
34816ad9 2121 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2122 if (ret)
2123 goto error2;
2124 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2125 break;
2126 default:
2127 ret = -EINVAL;
2128 goto error1;
2129 }
2130 cm_id_priv->service_timeout = service_timeout;
2131 cm_set_private_data(cm_id_priv, data, private_data_len);
2132 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2133 return 0;
2134
2135error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2136 kfree(data);
2137 return ret;
2138
2139error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2140 kfree(data);
2141 cm_free_msg(msg);
2142 return ret;
2143}
2144EXPORT_SYMBOL(ib_send_cm_mra);
2145
2146static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2147{
2148 switch (cm_mra_get_msg_mraed(mra_msg)) {
2149 case CM_MSG_RESPONSE_REQ:
2150 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2151 case CM_MSG_RESPONSE_REP:
2152 case CM_MSG_RESPONSE_OTHER:
2153 return cm_acquire_id(mra_msg->remote_comm_id,
2154 mra_msg->local_comm_id);
2155 default:
2156 return NULL;
2157 }
2158}
2159
2160static int cm_mra_handler(struct cm_work *work)
2161{
2162 struct cm_id_private *cm_id_priv;
2163 struct cm_mra_msg *mra_msg;
2164 unsigned long flags;
2165 int timeout, ret;
2166
2167 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2168 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2169 if (!cm_id_priv)
2170 return -EINVAL;
2171
2172 work->cm_event.private_data = &mra_msg->private_data;
2173 work->cm_event.param.mra_rcvd.service_timeout =
2174 cm_mra_get_service_timeout(mra_msg);
2175 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2176 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2177
2178 spin_lock_irqsave(&cm_id_priv->lock, flags);
2179 switch (cm_id_priv->id.state) {
2180 case IB_CM_REQ_SENT:
2181 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2182 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2183 cm_id_priv->msg, timeout))
a977049d
HR		 2184 goto out;
2185 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2186 break;
2187 case IB_CM_REP_SENT:
2188 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2189 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2190 cm_id_priv->msg, timeout))
a977049d
HR		 2191 goto out;
2192 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2193 break;
2194 case IB_CM_ESTABLISHED:
2195 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2196 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2197 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2198 cm_id_priv->msg, timeout))
a977049d
HR		 2199 goto out;
2200 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2201 break;
2202 default:
2203 goto out;
2204 }
2205
2206 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2207 cm_id_priv->id.state;
2208 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2209 if (!ret)
2210 list_add_tail(&work->list, &cm_id_priv->work_list);
2211 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2212
2213 if (ret)
2214 cm_process_work(cm_id_priv, work);
2215 else
2216 cm_deref_id(cm_id_priv);
2217 return 0;
2218out:
2219 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2220 cm_deref_id(cm_id_priv);
2221 return -EINVAL;
2222}
2223
2224static void cm_format_lap(struct cm_lap_msg *lap_msg,
2225 struct cm_id_private *cm_id_priv,
2226 struct ib_sa_path_rec *alternate_path,
2227 const void *private_data,
2228 u8 private_data_len)
2229{
2230 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2231 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2232 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2233 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2234 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2235 /* todo: need remote CM response timeout */
2236 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2237 lap_msg->alt_local_lid = alternate_path->slid;
2238 lap_msg->alt_remote_lid = alternate_path->dlid;
2239 lap_msg->alt_local_gid = alternate_path->sgid;
2240 lap_msg->alt_remote_gid = alternate_path->dgid;
2241 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2242 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2243 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2244 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2245 cm_lap_set_sl(lap_msg, alternate_path->sl);
2246 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2247 cm_lap_set_local_ack_timeout(lap_msg,
2248 min(31, alternate_path->packet_life_time + 1));
2249
2250 if (private_data && private_data_len)
2251 memcpy(lap_msg->private_data, private_data, private_data_len);
2252}
2253
2254int ib_send_cm_lap(struct ib_cm_id *cm_id,
2255 struct ib_sa_path_rec *alternate_path,
2256 const void *private_data,
2257 u8 private_data_len)
2258{
2259 struct cm_id_private *cm_id_priv;
2260 struct ib_mad_send_buf *msg;
a977049d
HR		 2261 unsigned long flags;
2262 int ret;
2263
2264 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2265 return -EINVAL;
2266
2267 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2268 spin_lock_irqsave(&cm_id_priv->lock, flags);
2269 if (cm_id->state != IB_CM_ESTABLISHED ||
2270 cm_id->lap_state != IB_CM_LAP_IDLE) {
2271 ret = -EINVAL;
2272 goto out;
2273 }
2274
2275 ret = cm_alloc_msg(cm_id_priv, &msg);
2276 if (ret)
2277 goto out;
2278
2279 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2280 alternate_path, private_data, private_data_len);
34816ad9 2281 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2282 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2283
34816ad9 2284 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2285 if (ret) {
2286 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2287 cm_free_msg(msg);
2288 return ret;
2289 }
2290
2291 cm_id->lap_state = IB_CM_LAP_SENT;
2292 cm_id_priv->msg = msg;
2293
2294out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2295 return ret;
2296}
2297EXPORT_SYMBOL(ib_send_cm_lap);
2298
2299static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2300 struct cm_lap_msg *lap_msg)
2301{
2302 memset(path, 0, sizeof *path);
2303 path->dgid = lap_msg->alt_local_gid;
2304 path->sgid = lap_msg->alt_remote_gid;
2305 path->dlid = lap_msg->alt_local_lid;
2306 path->slid = lap_msg->alt_remote_lid;
2307 path->flow_label = cm_lap_get_flow_label(lap_msg);
2308 path->hop_limit = lap_msg->alt_hop_limit;
2309 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2310 path->reversible = 1;
2311 /* pkey is same as in REQ */
2312 path->sl = cm_lap_get_sl(lap_msg);
2313 path->mtu_selector = IB_SA_EQ;
2314 /* mtu is same as in REQ */
2315 path->rate_selector = IB_SA_EQ;
2316 path->rate = cm_lap_get_packet_rate(lap_msg);
2317 path->packet_life_time_selector = IB_SA_EQ;
2318 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2319 path->packet_life_time -= (path->packet_life_time > 0);
2320}
2321
2322static int cm_lap_handler(struct cm_work *work)
2323{
2324 struct cm_id_private *cm_id_priv;
2325 struct cm_lap_msg *lap_msg;
2326 struct ib_cm_lap_event_param *param;
2327 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2328 unsigned long flags;
2329 int ret;
2330
2331 /* todo: verify LAP request and send reject APR if invalid. */
2332 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2333 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2334 lap_msg->local_comm_id);
2335 if (!cm_id_priv)
2336 return -EINVAL;
2337
2338 param = &work->cm_event.param.lap_rcvd;
2339 param->alternate_path = &work->path[0];
2340 cm_format_path_from_lap(param->alternate_path, lap_msg);
2341 work->cm_event.private_data = &lap_msg->private_data;
2342
2343 spin_lock_irqsave(&cm_id_priv->lock, flags);
2344 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2345 goto unlock;
2346
2347 switch (cm_id_priv->id.lap_state) {
2348 case IB_CM_LAP_IDLE:
2349 break;
2350 case IB_CM_MRA_LAP_SENT:
2351 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2352 goto unlock;
2353
2354 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2355 CM_MSG_RESPONSE_OTHER,
2356 cm_id_priv->service_timeout,
2357 cm_id_priv->private_data,
2358 cm_id_priv->private_data_len);
2359 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2360
34816ad9 2361 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2362 cm_free_msg(msg);
2363 goto deref;
2364 default:
2365 goto unlock;
2366 }
2367
2368 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2369 cm_id_priv->tid = lap_msg->hdr.tid;
2370 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2371 if (!ret)
2372 list_add_tail(&work->list, &cm_id_priv->work_list);
2373 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2374
2375 if (ret)
2376 cm_process_work(cm_id_priv, work);
2377 else
2378 cm_deref_id(cm_id_priv);
2379 return 0;
2380
2381unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2382deref: cm_deref_id(cm_id_priv);
2383 return -EINVAL;
2384}
2385
2386static void cm_format_apr(struct cm_apr_msg *apr_msg,
2387 struct cm_id_private *cm_id_priv,
2388 enum ib_cm_apr_status status,
2389 void *info,
2390 u8 info_length,
2391 const void *private_data,
2392 u8 private_data_len)
2393{
2394 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2395 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2396 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2397 apr_msg->ap_status = (u8) status;
2398
2399 if (info && info_length) {
2400 apr_msg->info_length = info_length;
2401 memcpy(apr_msg->info, info, info_length);
2402 }
2403
2404 if (private_data && private_data_len)
2405 memcpy(apr_msg->private_data, private_data, private_data_len);
2406}
2407
2408int ib_send_cm_apr(struct ib_cm_id *cm_id,
2409 enum ib_cm_apr_status status,
2410 void *info,
2411 u8 info_length,
2412 const void *private_data,
2413 u8 private_data_len)
2414{
2415 struct cm_id_private *cm_id_priv;
2416 struct ib_mad_send_buf *msg;
a977049d
HR		 2417 unsigned long flags;
2418 int ret;
2419
2420 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2421 (info && info_length > IB_CM_APR_INFO_LENGTH))
2422 return -EINVAL;
2423
2424 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2425 spin_lock_irqsave(&cm_id_priv->lock, flags);
2426 if (cm_id->state != IB_CM_ESTABLISHED ||
2427 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2428 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2429 ret = -EINVAL;
2430 goto out;
2431 }
2432
2433 ret = cm_alloc_msg(cm_id_priv, &msg);
2434 if (ret)
2435 goto out;
2436
2437 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2438 info, info_length, private_data, private_data_len);
34816ad9 2439 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2440 if (ret) {
2441 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2442 cm_free_msg(msg);
2443 return ret;
2444 }
2445
2446 cm_id->lap_state = IB_CM_LAP_IDLE;
2447out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2448 return ret;
2449}
2450EXPORT_SYMBOL(ib_send_cm_apr);
2451
2452static int cm_apr_handler(struct cm_work *work)
2453{
2454 struct cm_id_private *cm_id_priv;
2455 struct cm_apr_msg *apr_msg;
2456 unsigned long flags;
2457 int ret;
2458
2459 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2460 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2461 apr_msg->local_comm_id);
2462 if (!cm_id_priv)
2463 return -EINVAL; /* Unmatched reply. */
2464
2465 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2466 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2467 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2468 work->cm_event.private_data = &apr_msg->private_data;
2469
2470 spin_lock_irqsave(&cm_id_priv->lock, flags);
2471 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2472 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2473 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2474 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2475 goto out;
2476 }
2477 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
34816ad9 2478 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2479 cm_id_priv->msg = NULL;
2480
2481 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2482 if (!ret)
2483 list_add_tail(&work->list, &cm_id_priv->work_list);
2484 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2485
2486 if (ret)
2487 cm_process_work(cm_id_priv, work);
2488 else
2489 cm_deref_id(cm_id_priv);
2490 return 0;
2491out:
2492 cm_deref_id(cm_id_priv);
2493 return -EINVAL;
2494}
2495
2496static int cm_timewait_handler(struct cm_work *work)
2497{
2498 struct cm_timewait_info *timewait_info;
2499 struct cm_id_private *cm_id_priv;
2500 unsigned long flags;
2501 int ret;
2502
2503 timewait_info = (struct cm_timewait_info *)work;
2504 cm_cleanup_timewait(timewait_info);
2505
2506 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2507 timewait_info->work.remote_id);
2508 if (!cm_id_priv)
2509 return -EINVAL;
2510
2511 spin_lock_irqsave(&cm_id_priv->lock, flags);
2512 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2513 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2514 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2515 goto out;
2516 }
2517 cm_id_priv->id.state = IB_CM_IDLE;
2518 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2519 if (!ret)
2520 list_add_tail(&work->list, &cm_id_priv->work_list);
2521 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2522
2523 if (ret)
2524 cm_process_work(cm_id_priv, work);
2525 else
2526 cm_deref_id(cm_id_priv);
2527 return 0;
2528out:
2529 cm_deref_id(cm_id_priv);
2530 return -EINVAL;
2531}
2532
2533static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2534 struct cm_id_private *cm_id_priv,
2535 struct ib_cm_sidr_req_param *param)
2536{
2537 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2538 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2539 sidr_req_msg->request_id = cm_id_priv->id.local_id;
97f52eb4 2540 sidr_req_msg->pkey = cpu_to_be16(param->pkey);
a977049d
HR		 2541 sidr_req_msg->service_id = param->service_id;
2542
2543 if (param->private_data && param->private_data_len)
2544 memcpy(sidr_req_msg->private_data, param->private_data,
2545 param->private_data_len);
2546}
2547
2548int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2549 struct ib_cm_sidr_req_param *param)
2550{
2551 struct cm_id_private *cm_id_priv;
2552 struct ib_mad_send_buf *msg;
a977049d
HR		 2553 unsigned long flags;
2554 int ret;
2555
2556 if (!param->path || (param->private_data &&
2557 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2558 return -EINVAL;
2559
2560 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2561 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2562 if (ret)
2563 goto out;
2564
2565 cm_id->service_id = param->service_id;
97f52eb4 2566 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2567 cm_id_priv->timeout_ms = param->timeout_ms;
2568 cm_id_priv->max_cm_retries = param->max_cm_retries;
2569 ret = cm_alloc_msg(cm_id_priv, &msg);
2570 if (ret)
2571 goto out;
2572
2573 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2574 param);
34816ad9 2575 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2576 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2577
2578 spin_lock_irqsave(&cm_id_priv->lock, flags);
2579 if (cm_id->state == IB_CM_IDLE)
34816ad9 2580 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2581 else
2582 ret = -EINVAL;
2583
2584 if (ret) {
2585 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2586 cm_free_msg(msg);
2587 goto out;
2588 }
2589 cm_id->state = IB_CM_SIDR_REQ_SENT;
2590 cm_id_priv->msg = msg;
2591 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2592out:
2593 return ret;
2594}
2595EXPORT_SYMBOL(ib_send_cm_sidr_req);
2596
2597static void cm_format_sidr_req_event(struct cm_work *work,
2598 struct ib_cm_id *listen_id)
2599{
2600 struct cm_sidr_req_msg *sidr_req_msg;
2601 struct ib_cm_sidr_req_event_param *param;
2602
2603 sidr_req_msg = (struct cm_sidr_req_msg *)
2604 work->mad_recv_wc->recv_buf.mad;
2605 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 2606 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 2607 param->listen_id = listen_id;
a977049d
HR		 2608 param->port = work->port->port_num;
2609 work->cm_event.private_data = &sidr_req_msg->private_data;
2610}
2611
2612static int cm_sidr_req_handler(struct cm_work *work)
2613{
2614 struct ib_cm_id *cm_id;
2615 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2616 struct cm_sidr_req_msg *sidr_req_msg;
2617 struct ib_wc *wc;
2618 unsigned long flags;
2619
07d357d0 2620 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 2621 if (IS_ERR(cm_id))
2622 return PTR_ERR(cm_id);
2623 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2624
2625 /* Record SGID/SLID and request ID for lookup. */
2626 sidr_req_msg = (struct cm_sidr_req_msg *)
2627 work->mad_recv_wc->recv_buf.mad;
2628 wc = work->mad_recv_wc->wc;
97f52eb4 2629 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 2630 cm_id_priv->av.dgid.global.interface_id = 0;
2631 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2632 &cm_id_priv->av);
2633 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2634 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2635 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2636 atomic_inc(&cm_id_priv->work_count);
2637
2638 spin_lock_irqsave(&cm.lock, flags);
2639 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2640 if (cur_cm_id_priv) {
2641 spin_unlock_irqrestore(&cm.lock, flags);
2642 goto out; /* Duplicate message. */
2643 }
07d357d0
SH		 2644 cur_cm_id_priv = cm_find_listen(cm_id->device,
2645 sidr_req_msg->service_id);
a977049d
HR		 2646 if (!cur_cm_id_priv) {
2647 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2648 spin_unlock_irqrestore(&cm.lock, flags);
2649 /* todo: reply with no match */
2650 goto out; /* No match. */
2651 }
2652 atomic_inc(&cur_cm_id_priv->refcount);
2653 spin_unlock_irqrestore(&cm.lock, flags);
2654
2655 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2656 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2657 cm_id_priv->id.service_id = sidr_req_msg->service_id;
97f52eb4 2658 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2659
2660 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2661 cm_process_work(cm_id_priv, work);
2662 cm_deref_id(cur_cm_id_priv);
2663 return 0;
2664out:
2665 ib_destroy_cm_id(&cm_id_priv->id);
2666 return -EINVAL;
2667}
2668
2669static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2670 struct cm_id_private *cm_id_priv,
2671 struct ib_cm_sidr_rep_param *param)
2672{
2673 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2674 cm_id_priv->tid);
2675 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2676 sidr_rep_msg->status = param->status;
2677 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2678 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2679 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2680
2681 if (param->info && param->info_length)
2682 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2683
2684 if (param->private_data && param->private_data_len)
2685 memcpy(sidr_rep_msg->private_data, param->private_data,
2686 param->private_data_len);
2687}
2688
2689int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2690 struct ib_cm_sidr_rep_param *param)
2691{
2692 struct cm_id_private *cm_id_priv;
2693 struct ib_mad_send_buf *msg;
a977049d
HR		 2694 unsigned long flags;
2695 int ret;
2696
2697 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2698 (param->private_data &&
2699 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2700 return -EINVAL;
2701
2702 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2703 spin_lock_irqsave(&cm_id_priv->lock, flags);
2704 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2705 ret = -EINVAL;
2706 goto error;
2707 }
2708
2709 ret = cm_alloc_msg(cm_id_priv, &msg);
2710 if (ret)
2711 goto error;
2712
2713 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2714 param);
34816ad9 2715 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2716 if (ret) {
2717 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2718 cm_free_msg(msg);
2719 return ret;
2720 }
2721 cm_id->state = IB_CM_IDLE;
2722 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2723
2724 spin_lock_irqsave(&cm.lock, flags);
2725 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2726 spin_unlock_irqrestore(&cm.lock, flags);
2727 return 0;
2728
2729error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2730 return ret;
2731}
2732EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2733
2734static void cm_format_sidr_rep_event(struct cm_work *work)
2735{
2736 struct cm_sidr_rep_msg *sidr_rep_msg;
2737 struct ib_cm_sidr_rep_event_param *param;
2738
2739 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2740 work->mad_recv_wc->recv_buf.mad;
2741 param = &work->cm_event.param.sidr_rep_rcvd;
2742 param->status = sidr_rep_msg->status;
2743 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2744 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2745 param->info = &sidr_rep_msg->info;
2746 param->info_len = sidr_rep_msg->info_length;
2747 work->cm_event.private_data = &sidr_rep_msg->private_data;
2748}
2749
2750static int cm_sidr_rep_handler(struct cm_work *work)
2751{
2752 struct cm_sidr_rep_msg *sidr_rep_msg;
2753 struct cm_id_private *cm_id_priv;
2754 unsigned long flags;
2755
2756 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2757 work->mad_recv_wc->recv_buf.mad;
2758 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2759 if (!cm_id_priv)
2760 return -EINVAL; /* Unmatched reply. */
2761
2762 spin_lock_irqsave(&cm_id_priv->lock, flags);
2763 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2764 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2765 goto out;
2766 }
2767 cm_id_priv->id.state = IB_CM_IDLE;
34816ad9 2768 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2769 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2770
2771 cm_format_sidr_rep_event(work);
2772 cm_process_work(cm_id_priv, work);
2773 return 0;
2774out:
2775 cm_deref_id(cm_id_priv);
2776 return -EINVAL;
2777}
2778
2779static void cm_process_send_error(struct ib_mad_send_buf *msg,
2780 enum ib_wc_status wc_status)
2781{
2782 struct cm_id_private *cm_id_priv;
2783 struct ib_cm_event cm_event;
2784 enum ib_cm_state state;
2785 unsigned long flags;
2786 int ret;
2787
2788 memset(&cm_event, 0, sizeof cm_event);
2789 cm_id_priv = msg->context[0];
2790
2791 /* Discard old sends or ones without a response. */
2792 spin_lock_irqsave(&cm_id_priv->lock, flags);
2793 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2794 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2795 goto discard;
2796
2797 switch (state) {
2798 case IB_CM_REQ_SENT:
2799 case IB_CM_MRA_REQ_RCVD:
2800 cm_reset_to_idle(cm_id_priv);
2801 cm_event.event = IB_CM_REQ_ERROR;
2802 break;
2803 case IB_CM_REP_SENT:
2804 case IB_CM_MRA_REP_RCVD:
2805 cm_reset_to_idle(cm_id_priv);
2806 cm_event.event = IB_CM_REP_ERROR;
2807 break;
2808 case IB_CM_DREQ_SENT:
2809 cm_enter_timewait(cm_id_priv);
2810 cm_event.event = IB_CM_DREQ_ERROR;
2811 break;
2812 case IB_CM_SIDR_REQ_SENT:
2813 cm_id_priv->id.state = IB_CM_IDLE;
2814 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2815 break;
2816 default:
2817 goto discard;
2818 }
2819 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2820 cm_event.param.send_status = wc_status;
2821
2822 /* No other events can occur on the cm_id at this point. */
2823 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2824 cm_free_msg(msg);
2825 if (ret)
2826 ib_destroy_cm_id(&cm_id_priv->id);
2827 return;
2828discard:
2829 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2830 cm_free_msg(msg);
2831}
2832
2833static void cm_send_handler(struct ib_mad_agent *mad_agent,
2834 struct ib_mad_send_wc *mad_send_wc)
2835{
34816ad9 2836 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
a977049d
HR		 2837
2838 switch (mad_send_wc->status) {
2839 case IB_WC_SUCCESS:
2840 case IB_WC_WR_FLUSH_ERR:
2841 cm_free_msg(msg);
2842 break;
2843 default:
2844 if (msg->context[0] && msg->context[1])
2845 cm_process_send_error(msg, mad_send_wc->status);
2846 else
2847 cm_free_msg(msg);
2848 break;
2849 }
2850}
2851
2852static void cm_work_handler(void *data)
2853{
2854 struct cm_work *work = data;
2855 int ret;
2856
2857 switch (work->cm_event.event) {
2858 case IB_CM_REQ_RECEIVED:
2859 ret = cm_req_handler(work);
2860 break;
2861 case IB_CM_MRA_RECEIVED:
2862 ret = cm_mra_handler(work);
2863 break;
2864 case IB_CM_REJ_RECEIVED:
2865 ret = cm_rej_handler(work);
2866 break;
2867 case IB_CM_REP_RECEIVED:
2868 ret = cm_rep_handler(work);
2869 break;
2870 case IB_CM_RTU_RECEIVED:
2871 ret = cm_rtu_handler(work);
2872 break;
2873 case IB_CM_USER_ESTABLISHED:
2874 ret = cm_establish_handler(work);
2875 break;
2876 case IB_CM_DREQ_RECEIVED:
2877 ret = cm_dreq_handler(work);
2878 break;
2879 case IB_CM_DREP_RECEIVED:
2880 ret = cm_drep_handler(work);
2881 break;
2882 case IB_CM_SIDR_REQ_RECEIVED:
2883 ret = cm_sidr_req_handler(work);
2884 break;
2885 case IB_CM_SIDR_REP_RECEIVED:
2886 ret = cm_sidr_rep_handler(work);
2887 break;
2888 case IB_CM_LAP_RECEIVED:
2889 ret = cm_lap_handler(work);
2890 break;
2891 case IB_CM_APR_RECEIVED:
2892 ret = cm_apr_handler(work);
2893 break;
2894 case IB_CM_TIMEWAIT_EXIT:
2895 ret = cm_timewait_handler(work);
2896 break;
2897 default:
2898 ret = -EINVAL;
2899 break;
2900 }
2901 if (ret)
2902 cm_free_work(work);
2903}
2904
2905int ib_cm_establish(struct ib_cm_id *cm_id)
2906{
2907 struct cm_id_private *cm_id_priv;
2908 struct cm_work *work;
2909 unsigned long flags;
2910 int ret = 0;
2911
2912 work = kmalloc(sizeof *work, GFP_ATOMIC);
2913 if (!work)
2914 return -ENOMEM;
2915
2916 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2917 spin_lock_irqsave(&cm_id_priv->lock, flags);
2918 switch (cm_id->state)
2919 {
2920 case IB_CM_REP_SENT:
2921 case IB_CM_MRA_REP_RCVD:
2922 cm_id->state = IB_CM_ESTABLISHED;
2923 break;
2924 case IB_CM_ESTABLISHED:
2925 ret = -EISCONN;
2926 break;
2927 default:
2928 ret = -EINVAL;
2929 break;
2930 }
2931 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2932
2933 if (ret) {
2934 kfree(work);
2935 goto out;
2936 }
2937
2938 /*
2939 * The CM worker thread may try to destroy the cm_id before it
2940 * can execute this work item. To prevent potential deadlock,
2941 * we need to find the cm_id once we're in the context of the
2942 * worker thread, rather than holding a reference on it.
2943 */
2944 INIT_WORK(&work->work, cm_work_handler, work);
2945 work->local_id = cm_id->local_id;
2946 work->remote_id = cm_id->remote_id;
2947 work->mad_recv_wc = NULL;
2948 work->cm_event.event = IB_CM_USER_ESTABLISHED;
2949 queue_work(cm.wq, &work->work);
2950out:
2951 return ret;
2952}
2953EXPORT_SYMBOL(ib_cm_establish);
2954
2955static void cm_recv_handler(struct ib_mad_agent *mad_agent,
2956 struct ib_mad_recv_wc *mad_recv_wc)
2957{
2958 struct cm_work *work;
2959 enum ib_cm_event_type event;
2960 int paths = 0;
2961
2962 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
2963 case CM_REQ_ATTR_ID:
2964 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
2965 alt_local_lid != 0);
2966 event = IB_CM_REQ_RECEIVED;
2967 break;
2968 case CM_MRA_ATTR_ID:
2969 event = IB_CM_MRA_RECEIVED;
2970 break;
2971 case CM_REJ_ATTR_ID:
2972 event = IB_CM_REJ_RECEIVED;
2973 break;
2974 case CM_REP_ATTR_ID:
2975 event = IB_CM_REP_RECEIVED;
2976 break;
2977 case CM_RTU_ATTR_ID:
2978 event = IB_CM_RTU_RECEIVED;
2979 break;
2980 case CM_DREQ_ATTR_ID:
2981 event = IB_CM_DREQ_RECEIVED;
2982 break;
2983 case CM_DREP_ATTR_ID:
2984 event = IB_CM_DREP_RECEIVED;
2985 break;
2986 case CM_SIDR_REQ_ATTR_ID:
2987 event = IB_CM_SIDR_REQ_RECEIVED;
2988 break;
2989 case CM_SIDR_REP_ATTR_ID:
2990 event = IB_CM_SIDR_REP_RECEIVED;
2991 break;
2992 case CM_LAP_ATTR_ID:
2993 paths = 1;
2994 event = IB_CM_LAP_RECEIVED;
2995 break;
2996 case CM_APR_ATTR_ID:
2997 event = IB_CM_APR_RECEIVED;
2998 break;
2999 default:
3000 ib_free_recv_mad(mad_recv_wc);
3001 return;
3002 }
3003
3004 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3005 GFP_KERNEL);
3006 if (!work) {
3007 ib_free_recv_mad(mad_recv_wc);
3008 return;
3009 }
3010
3011 INIT_WORK(&work->work, cm_work_handler, work);
3012 work->cm_event.event = event;
3013 work->mad_recv_wc = mad_recv_wc;
3014 work->port = (struct cm_port *)mad_agent->context;
3015 queue_work(cm.wq, &work->work);
3016}
3017
3018static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3019 struct ib_qp_attr *qp_attr,
3020 int *qp_attr_mask)
3021{
3022 unsigned long flags;
3023 int ret;
3024
3025 spin_lock_irqsave(&cm_id_priv->lock, flags);
3026 switch (cm_id_priv->id.state) {
3027 case IB_CM_REQ_SENT:
3028 case IB_CM_MRA_REQ_RCVD:
3029 case IB_CM_REQ_RCVD:
3030 case IB_CM_MRA_REQ_SENT:
3031 case IB_CM_REP_RCVD:
3032 case IB_CM_MRA_REP_SENT:
3033 case IB_CM_REP_SENT:
3034 case IB_CM_MRA_REP_RCVD:
3035 case IB_CM_ESTABLISHED:
3036 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3037 IB_QP_PKEY_INDEX | IB_QP_PORT;
ae7971a7
SH		 3038 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE |
3039 IB_ACCESS_REMOTE_WRITE;
a977049d 3040 if (cm_id_priv->responder_resources)
ae7971a7 3041 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ;
a977049d
HR		 3042 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3043 qp_attr->port_num = cm_id_priv->av.port->port_num;
3044 ret = 0;
3045 break;
3046 default:
3047 ret = -EINVAL;
3048 break;
3049 }
3050 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3051 return ret;
3052}
3053
3054static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3055 struct ib_qp_attr *qp_attr,
3056 int *qp_attr_mask)
3057{
3058 unsigned long flags;
3059 int ret;
3060
3061 spin_lock_irqsave(&cm_id_priv->lock, flags);
3062 switch (cm_id_priv->id.state) {
3063 case IB_CM_REQ_RCVD:
3064 case IB_CM_MRA_REQ_SENT:
3065 case IB_CM_REP_RCVD:
3066 case IB_CM_MRA_REP_SENT:
3067 case IB_CM_REP_SENT:
3068 case IB_CM_MRA_REP_RCVD:
3069 case IB_CM_ESTABLISHED:
3070 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 3071 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d
HR		 3072 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3073 qp_attr->path_mtu = cm_id_priv->path_mtu;
3074 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3075 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
ae7971a7
SH		 3076 if (cm_id_priv->qp_type == IB_QPT_RC) {
3077 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3078 IB_QP_MIN_RNR_TIMER;
3079 qp_attr->max_dest_rd_atomic =
3080 cm_id_priv->responder_resources;
3081 qp_attr->min_rnr_timer = 0;
3082 }
a977049d
HR		 3083 if (cm_id_priv->alt_av.ah_attr.dlid) {
3084 *qp_attr_mask |= IB_QP_ALT_PATH;
3085 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3086 }
3087 ret = 0;
3088 break;
3089 default:
3090 ret = -EINVAL;
3091 break;
3092 }
3093 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3094 return ret;
3095}
3096
3097static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3098 struct ib_qp_attr *qp_attr,
3099 int *qp_attr_mask)
3100{
3101 unsigned long flags;
3102 int ret;
3103
3104 spin_lock_irqsave(&cm_id_priv->lock, flags);
3105 switch (cm_id_priv->id.state) {
3106 case IB_CM_REP_RCVD:
3107 case IB_CM_MRA_REP_SENT:
3108 case IB_CM_REP_SENT:
3109 case IB_CM_MRA_REP_RCVD:
3110 case IB_CM_ESTABLISHED:
ae7971a7 3111 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
a977049d 3112 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
ae7971a7
SH		 3113 if (cm_id_priv->qp_type == IB_QPT_RC) {
3114 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3115 IB_QP_RNR_RETRY |
3116 IB_QP_MAX_QP_RD_ATOMIC;
3117 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3118 qp_attr->retry_cnt = cm_id_priv->retry_count;
3119 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3120 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3121 }
a977049d
HR		 3122 if (cm_id_priv->alt_av.ah_attr.dlid) {
3123 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3124 qp_attr->path_mig_state = IB_MIG_REARM;
3125 }
3126 ret = 0;
3127 break;
3128 default:
3129 ret = -EINVAL;
3130 break;
3131 }
3132 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3133 return ret;
3134}
3135
3136int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3137 struct ib_qp_attr *qp_attr,
3138 int *qp_attr_mask)
3139{
3140 struct cm_id_private *cm_id_priv;
3141 int ret;
3142
3143 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3144 switch (qp_attr->qp_state) {
3145 case IB_QPS_INIT:
3146 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3147 break;
3148 case IB_QPS_RTR:
3149 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3150 break;
3151 case IB_QPS_RTS:
3152 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3153 break;
3154 default:
3155 ret = -EINVAL;
3156 break;
3157 }
3158 return ret;
3159}
3160EXPORT_SYMBOL(ib_cm_init_qp_attr);
3161
97f52eb4 3162static __be64 cm_get_ca_guid(struct ib_device *device)
a977049d
HR		 3163{
3164 struct ib_device_attr *device_attr;
97f52eb4 3165 __be64 guid;
a977049d
HR		 3166 int ret;
3167
3168 device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
3169 if (!device_attr)
3170 return 0;
3171
3172 ret = ib_query_device(device, device_attr);
3173 guid = ret ? 0 : device_attr->node_guid;
3174 kfree(device_attr);
3175 return guid;
3176}
3177
3178static void cm_add_one(struct ib_device *device)
3179{
3180 struct cm_device *cm_dev;
3181 struct cm_port *port;
3182 struct ib_mad_reg_req reg_req = {
3183 .mgmt_class = IB_MGMT_CLASS_CM,
3184 .mgmt_class_version = IB_CM_CLASS_VERSION
3185 };
3186 struct ib_port_modify port_modify = {
3187 .set_port_cap_mask = IB_PORT_CM_SUP
3188 };
3189 unsigned long flags;
3190 int ret;
3191 u8 i;
3192
3193 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3194 device->phys_port_cnt, GFP_KERNEL);
3195 if (!cm_dev)
3196 return;
3197
3198 cm_dev->device = device;
3199 cm_dev->ca_guid = cm_get_ca_guid(device);
3200 if (!cm_dev->ca_guid)
3201 goto error1;
3202
3203 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3204 for (i = 1; i <= device->phys_port_cnt; i++) {
3205 port = &cm_dev->port[i-1];
3206 port->cm_dev = cm_dev;
3207 port->port_num = i;
3208 port->mad_agent = ib_register_mad_agent(device, i,
3209 IB_QPT_GSI,
3210 &reg_req,
3211 0,
3212 cm_send_handler,
3213 cm_recv_handler,
3214 port);
3215 if (IS_ERR(port->mad_agent))
3216 goto error2;
3217
3218 ret = ib_modify_port(device, i, 0, &port_modify);
3219 if (ret)
3220 goto error3;
3221 }
3222 ib_set_client_data(device, &cm_client, cm_dev);
3223
3224 write_lock_irqsave(&cm.device_lock, flags);
3225 list_add_tail(&cm_dev->list, &cm.device_list);
3226 write_unlock_irqrestore(&cm.device_lock, flags);
3227 return;
3228
3229error3:
3230 ib_unregister_mad_agent(port->mad_agent);
3231error2:
3232 port_modify.set_port_cap_mask = 0;
3233 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3234 while (--i) {
3235 port = &cm_dev->port[i-1];
3236 ib_modify_port(device, port->port_num, 0, &port_modify);
3237 ib_unregister_mad_agent(port->mad_agent);
3238 }
3239error1:
3240 kfree(cm_dev);
3241}
3242
3243static void cm_remove_one(struct ib_device *device)
3244{
3245 struct cm_device *cm_dev;
3246 struct cm_port *port;
3247 struct ib_port_modify port_modify = {
3248 .clr_port_cap_mask = IB_PORT_CM_SUP
3249 };
3250 unsigned long flags;
3251 int i;
3252
3253 cm_dev = ib_get_client_data(device, &cm_client);
3254 if (!cm_dev)
3255 return;
3256
3257 write_lock_irqsave(&cm.device_lock, flags);
3258 list_del(&cm_dev->list);
3259 write_unlock_irqrestore(&cm.device_lock, flags);
3260
3261 for (i = 1; i <= device->phys_port_cnt; i++) {
3262 port = &cm_dev->port[i-1];
3263 ib_modify_port(device, port->port_num, 0, &port_modify);
3264 ib_unregister_mad_agent(port->mad_agent);
3265 }
3266 kfree(cm_dev);
3267}
3268
3269static int __init ib_cm_init(void)
3270{
3271 int ret;
3272
3273 memset(&cm, 0, sizeof cm);
3274 INIT_LIST_HEAD(&cm.device_list);
3275 rwlock_init(&cm.device_lock);
3276 spin_lock_init(&cm.lock);
3277 cm.listen_service_table = RB_ROOT;
3278 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3279 cm.remote_id_table = RB_ROOT;
3280 cm.remote_qp_table = RB_ROOT;
3281 cm.remote_sidr_table = RB_ROOT;
3282 idr_init(&cm.local_id_table);
3283 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3284
3285 cm.wq = create_workqueue("ib_cm");
3286 if (!cm.wq)
3287 return -ENOMEM;
3288
3289 ret = ib_register_client(&cm_client);
3290 if (ret)
3291 goto error;
3292
3293 return 0;
3294error:
3295 destroy_workqueue(cm.wq);
3296 return ret;
3297}
3298
3299static void __exit ib_cm_cleanup(void)
3300{
3301 flush_workqueue(cm.wq);
3302 destroy_workqueue(cm.wq);
3303 ib_unregister_client(&cm_client);
5d7edb3c 3304 idr_destroy(&cm.local_id_table);
a977049d
HR		 3305}
3306
3307module_init(ib_cm_init);
3308module_exit(ib_cm_cleanup);
3309
Linux kernel - Deliverables
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