projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Manual merge of for-linus to upstream (fix conflicts in drivers/infiniband/core/ucm.c)
[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;
138 __be32 sq_psn;
139 __be32 rq_psn;
a977049d
HR		 140 int timeout_ms;
141 enum ib_mtu path_mtu;
142 u8 private_data_len;
143 u8 max_cm_retries;
144 u8 peer_to_peer;
145 u8 responder_resources;
146 u8 initiator_depth;
147 u8 local_ack_timeout;
148 u8 retry_count;
149 u8 rnr_retry_count;
150 u8 service_timeout;
151
152 struct list_head work_list;
153 atomic_t work_count;
154};
155
156static void cm_work_handler(void *data);
157
158static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
159{
160 if (atomic_dec_and_test(&cm_id_priv->refcount))
161 wake_up(&cm_id_priv->wait);
162}
163
164static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
165 struct ib_mad_send_buf **msg)
166{
167 struct ib_mad_agent *mad_agent;
168 struct ib_mad_send_buf *m;
169 struct ib_ah *ah;
170
171 mad_agent = cm_id_priv->av.port->mad_agent;
172 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
173 if (IS_ERR(ah))
174 return PTR_ERR(ah);
175
354ba39c
JK		 176 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
177 cm_id_priv->av.pkey_index,
a977049d
HR		 178 ah, 0, sizeof(struct ib_mad_hdr),
179 sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr),
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. */
187 m->send_wr.wr.ud.retries = cm_id_priv->max_cm_retries;
188
189 atomic_inc(&cm_id_priv->refcount);
190 m->context[0] = cm_id_priv;
191 *msg = m;
192 return 0;
193}
194
195static int cm_alloc_response_msg(struct cm_port *port,
196 struct ib_mad_recv_wc *mad_recv_wc,
197 struct ib_mad_send_buf **msg)
198{
199 struct ib_mad_send_buf *m;
200 struct ib_ah *ah;
201
202 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
203 mad_recv_wc->recv_buf.grh, port->port_num);
204 if (IS_ERR(ah))
205 return PTR_ERR(ah);
206
207 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
208 ah, 0, sizeof(struct ib_mad_hdr),
209 sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr),
210 GFP_ATOMIC);
211 if (IS_ERR(m)) {
212 ib_destroy_ah(ah);
213 return PTR_ERR(m);
214 }
215 *msg = m;
216 return 0;
217}
218
219static void cm_free_msg(struct ib_mad_send_buf *msg)
220{
221 ib_destroy_ah(msg->send_wr.wr.ud.ah);
222 if (msg->context[0])
223 cm_deref_id(msg->context[0]);
224 ib_free_send_mad(msg);
225}
226
227static void * cm_copy_private_data(const void *private_data,
228 u8 private_data_len)
229{
230 void *data;
231
232 if (!private_data || !private_data_len)
233 return NULL;
234
235 data = kmalloc(private_data_len, GFP_KERNEL);
236 if (!data)
237 return ERR_PTR(-ENOMEM);
238
239 memcpy(data, private_data, private_data_len);
240 return data;
241}
242
243static void cm_set_private_data(struct cm_id_private *cm_id_priv,
244 void *private_data, u8 private_data_len)
245{
246 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
247 kfree(cm_id_priv->private_data);
248
249 cm_id_priv->private_data = private_data;
250 cm_id_priv->private_data_len = private_data_len;
251}
252
253static void cm_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num,
254 u16 dlid, u8 sl, u16 src_path_bits)
255{
256 memset(ah_attr, 0, sizeof ah_attr);
97f52eb4 257 ah_attr->dlid = dlid;
a977049d
HR		 258 ah_attr->sl = sl;
259 ah_attr->src_path_bits = src_path_bits;
260 ah_attr->port_num = port_num;
261}
262
263static void cm_init_av_for_response(struct cm_port *port,
264 struct ib_wc *wc, struct cm_av *av)
265{
266 av->port = port;
267 av->pkey_index = wc->pkey_index;
97f52eb4 268 cm_set_ah_attr(&av->ah_attr, port->port_num, wc->slid,
a977049d
HR		 269 wc->sl, wc->dlid_path_bits);
270}
271
272static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
273{
274 struct cm_device *cm_dev;
275 struct cm_port *port = NULL;
276 unsigned long flags;
277 int ret;
278 u8 p;
279
280 read_lock_irqsave(&cm.device_lock, flags);
281 list_for_each_entry(cm_dev, &cm.device_list, list) {
282 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
283 &p, NULL)) {
284 port = &cm_dev->port[p-1];
285 break;
286 }
287 }
288 read_unlock_irqrestore(&cm.device_lock, flags);
289
290 if (!port)
291 return -EINVAL;
292
293 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
294 be16_to_cpu(path->pkey), &av->pkey_index);
295 if (ret)
296 return ret;
297
298 av->port = port;
97f52eb4
SH		 299 cm_set_ah_attr(&av->ah_attr, av->port->port_num,
300 be16_to_cpu(path->dlid), path->sl,
301 be16_to_cpu(path->slid) & 0x7F);
a977049d
HR		 302 av->packet_life_time = path->packet_life_time;
303 return 0;
304}
305
306static int cm_alloc_id(struct cm_id_private *cm_id_priv)
307{
308 unsigned long flags;
309 int ret;
310
311 do {
312 spin_lock_irqsave(&cm.lock, flags);
313 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 1,
97f52eb4 314 (__force int *) &cm_id_priv->id.local_id);
a977049d
HR		 315 spin_unlock_irqrestore(&cm.lock, flags);
316 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
317 return ret;
318}
319
97f52eb4 320static void cm_free_id(__be32 local_id)
a977049d
HR		 321{
322 unsigned long flags;
323
324 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 325 idr_remove(&cm.local_id_table, (__force int) local_id);
a977049d
HR		 326 spin_unlock_irqrestore(&cm.lock, flags);
327}
328
97f52eb4 329static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 330{
331 struct cm_id_private *cm_id_priv;
332
97f52eb4 333 cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id);
a977049d
HR		 334 if (cm_id_priv) {
335 if (cm_id_priv->id.remote_id == remote_id)
336 atomic_inc(&cm_id_priv->refcount);
337 else
338 cm_id_priv = NULL;
339 }
340
341 return cm_id_priv;
342}
343
97f52eb4 344static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 345{
346 struct cm_id_private *cm_id_priv;
347 unsigned long flags;
348
349 spin_lock_irqsave(&cm.lock, flags);
350 cm_id_priv = cm_get_id(local_id, remote_id);
351 spin_unlock_irqrestore(&cm.lock, flags);
352
353 return cm_id_priv;
354}
355
356static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
357{
358 struct rb_node **link = &cm.listen_service_table.rb_node;
359 struct rb_node *parent = NULL;
360 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 361 __be64 service_id = cm_id_priv->id.service_id;
362 __be64 service_mask = cm_id_priv->id.service_mask;
a977049d
HR		 363
364 while (*link) {
365 parent = *link;
366 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
367 service_node);
368 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0
SH		 369 (service_mask & cur_cm_id_priv->id.service_id) &&
370 (cm_id_priv->id.device == cur_cm_id_priv->id.device))
371 return cur_cm_id_priv;
372
373 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
374 link = &(*link)->rb_left;
375 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
376 link = &(*link)->rb_right;
377 else if (service_id < cur_cm_id_priv->id.service_id)
a977049d
HR		 378 link = &(*link)->rb_left;
379 else
380 link = &(*link)->rb_right;
381 }
382 rb_link_node(&cm_id_priv->service_node, parent, link);
383 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
384 return NULL;
385}
386
07d357d0
SH		 387static struct cm_id_private * cm_find_listen(struct ib_device *device,
388 __be64 service_id)
a977049d
HR		 389{
390 struct rb_node *node = cm.listen_service_table.rb_node;
391 struct cm_id_private *cm_id_priv;
392
393 while (node) {
394 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
395 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0
SH		 396 cm_id_priv->id.service_id &&
397 (cm_id_priv->id.device == device))
a977049d 398 return cm_id_priv;
07d357d0
SH		 399
400 if (device < cm_id_priv->id.device)
401 node = node->rb_left;
402 else if (device > cm_id_priv->id.device)
403 node = node->rb_right;
404 else if (service_id < cm_id_priv->id.service_id)
a977049d
HR		 405 node = node->rb_left;
406 else
407 node = node->rb_right;
408 }
409 return NULL;
410}
411
412static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
413 *timewait_info)
414{
415 struct rb_node **link = &cm.remote_id_table.rb_node;
416 struct rb_node *parent = NULL;
417 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 418 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
419 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 420
421 while (*link) {
422 parent = *link;
423 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
424 remote_id_node);
425 if (remote_id < cur_timewait_info->work.remote_id)
426 link = &(*link)->rb_left;
427 else if (remote_id > cur_timewait_info->work.remote_id)
428 link = &(*link)->rb_right;
429 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
430 link = &(*link)->rb_left;
431 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
432 link = &(*link)->rb_right;
433 else
434 return cur_timewait_info;
435 }
436 timewait_info->inserted_remote_id = 1;
437 rb_link_node(&timewait_info->remote_id_node, parent, link);
438 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
439 return NULL;
440}
441
97f52eb4
SH		 442static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
443 __be32 remote_id)
a977049d
HR		 444{
445 struct rb_node *node = cm.remote_id_table.rb_node;
446 struct cm_timewait_info *timewait_info;
447
448 while (node) {
449 timewait_info = rb_entry(node, struct cm_timewait_info,
450 remote_id_node);
451 if (remote_id < timewait_info->work.remote_id)
452 node = node->rb_left;
453 else if (remote_id > timewait_info->work.remote_id)
454 node = node->rb_right;
455 else if (remote_ca_guid < timewait_info->remote_ca_guid)
456 node = node->rb_left;
457 else if (remote_ca_guid > timewait_info->remote_ca_guid)
458 node = node->rb_right;
459 else
460 return timewait_info;
461 }
462 return NULL;
463}
464
465static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
466 *timewait_info)
467{
468 struct rb_node **link = &cm.remote_qp_table.rb_node;
469 struct rb_node *parent = NULL;
470 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 471 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
472 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 473
474 while (*link) {
475 parent = *link;
476 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
477 remote_qp_node);
478 if (remote_qpn < cur_timewait_info->remote_qpn)
479 link = &(*link)->rb_left;
480 else if (remote_qpn > cur_timewait_info->remote_qpn)
481 link = &(*link)->rb_right;
482 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
483 link = &(*link)->rb_left;
484 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
485 link = &(*link)->rb_right;
486 else
487 return cur_timewait_info;
488 }
489 timewait_info->inserted_remote_qp = 1;
490 rb_link_node(&timewait_info->remote_qp_node, parent, link);
491 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
492 return NULL;
493}
494
495static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
496 *cm_id_priv)
497{
498 struct rb_node **link = &cm.remote_sidr_table.rb_node;
499 struct rb_node *parent = NULL;
500 struct cm_id_private *cur_cm_id_priv;
501 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 502 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 503
504 while (*link) {
505 parent = *link;
506 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
507 sidr_id_node);
508 if (remote_id < cur_cm_id_priv->id.remote_id)
509 link = &(*link)->rb_left;
510 else if (remote_id > cur_cm_id_priv->id.remote_id)
511 link = &(*link)->rb_right;
512 else {
513 int cmp;
514 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
515 sizeof *port_gid);
516 if (cmp < 0)
517 link = &(*link)->rb_left;
518 else if (cmp > 0)
519 link = &(*link)->rb_right;
520 else
521 return cur_cm_id_priv;
522 }
523 }
524 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
525 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
526 return NULL;
527}
528
529static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
530 enum ib_cm_sidr_status status)
531{
532 struct ib_cm_sidr_rep_param param;
533
534 memset(&param, 0, sizeof param);
535 param.status = status;
536 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
537}
538
07d357d0
SH		 539struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
540 ib_cm_handler cm_handler,
a977049d
HR		 541 void *context)
542{
543 struct cm_id_private *cm_id_priv;
544 int ret;
545
546 cm_id_priv = kmalloc(sizeof *cm_id_priv, GFP_KERNEL);
547 if (!cm_id_priv)
548 return ERR_PTR(-ENOMEM);
549
550 memset(cm_id_priv, 0, sizeof *cm_id_priv);
551 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 552 cm_id_priv->id.device = device;
a977049d
HR		 553 cm_id_priv->id.cm_handler = cm_handler;
554 cm_id_priv->id.context = context;
354ba39c 555 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 556 ret = cm_alloc_id(cm_id_priv);
557 if (ret)
558 goto error;
559
560 spin_lock_init(&cm_id_priv->lock);
561 init_waitqueue_head(&cm_id_priv->wait);
562 INIT_LIST_HEAD(&cm_id_priv->work_list);
563 atomic_set(&cm_id_priv->work_count, -1);
564 atomic_set(&cm_id_priv->refcount, 1);
565 return &cm_id_priv->id;
566
567error:
568 kfree(cm_id_priv);
569 return ERR_PTR(-ENOMEM);
570}
571EXPORT_SYMBOL(ib_create_cm_id);
572
573static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
574{
575 struct cm_work *work;
576
577 if (list_empty(&cm_id_priv->work_list))
578 return NULL;
579
580 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
581 list_del(&work->list);
582 return work;
583}
584
585static void cm_free_work(struct cm_work *work)
586{
587 if (work->mad_recv_wc)
588 ib_free_recv_mad(work->mad_recv_wc);
589 kfree(work);
590}
591
592static inline int cm_convert_to_ms(int iba_time)
593{
594 /* approximate conversion to ms from 4.096us x 2^iba_time */
595 return 1 << max(iba_time - 8, 0);
596}
597
598static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
599{
600 unsigned long flags;
601
602 if (!timewait_info->inserted_remote_id &&
603 !timewait_info->inserted_remote_qp)
604 return;
605
606 spin_lock_irqsave(&cm.lock, flags);
607 if (timewait_info->inserted_remote_id) {
608 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
609 timewait_info->inserted_remote_id = 0;
610 }
611
612 if (timewait_info->inserted_remote_qp) {
613 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
614 timewait_info->inserted_remote_qp = 0;
615 }
616 spin_unlock_irqrestore(&cm.lock, flags);
617}
618
97f52eb4 619static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 620{
621 struct cm_timewait_info *timewait_info;
622
623 timewait_info = kmalloc(sizeof *timewait_info, GFP_KERNEL);
624 if (!timewait_info)
625 return ERR_PTR(-ENOMEM);
626 memset(timewait_info, 0, sizeof *timewait_info);
627
628 timewait_info->work.local_id = local_id;
629 INIT_WORK(&timewait_info->work.work, cm_work_handler,
630 &timewait_info->work);
631 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
632 return timewait_info;
633}
634
635static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
636{
637 int wait_time;
638
639 /*
640 * The cm_id could be destroyed by the user before we exit timewait.
641 * To protect against this, we search for the cm_id after exiting
642 * timewait before notifying the user that we've exited timewait.
643 */
644 cm_id_priv->id.state = IB_CM_TIMEWAIT;
645 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
646 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
647 msecs_to_jiffies(wait_time));
648 cm_id_priv->timewait_info = NULL;
649}
650
651static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
652{
653 cm_id_priv->id.state = IB_CM_IDLE;
654 if (cm_id_priv->timewait_info) {
655 cm_cleanup_timewait(cm_id_priv->timewait_info);
656 kfree(cm_id_priv->timewait_info);
657 cm_id_priv->timewait_info = NULL;
658 }
659}
660
661void ib_destroy_cm_id(struct ib_cm_id *cm_id)
662{
663 struct cm_id_private *cm_id_priv;
664 struct cm_work *work;
665 unsigned long flags;
666
667 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
668retest:
669 spin_lock_irqsave(&cm_id_priv->lock, flags);
670 switch (cm_id->state) {
671 case IB_CM_LISTEN:
672 cm_id->state = IB_CM_IDLE;
673 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
674 spin_lock_irqsave(&cm.lock, flags);
675 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
676 spin_unlock_irqrestore(&cm.lock, flags);
677 break;
678 case IB_CM_SIDR_REQ_SENT:
679 cm_id->state = IB_CM_IDLE;
680 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
681 (unsigned long) cm_id_priv->msg);
682 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
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:
692 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
693 (unsigned long) cm_id_priv->msg);
694 /* Fall through */
695 case IB_CM_REQ_RCVD:
696 case IB_CM_MRA_REQ_SENT:
697 case IB_CM_REP_RCVD:
698 case IB_CM_MRA_REP_SENT:
699 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
700 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
701 &cm_id_priv->av.port->cm_dev->ca_guid,
702 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
703 NULL, 0);
704 break;
705 case IB_CM_ESTABLISHED:
706 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
707 ib_send_cm_dreq(cm_id, NULL, 0);
708 goto retest;
709 case IB_CM_DREQ_SENT:
710 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
711 (unsigned long) cm_id_priv->msg);
712 cm_enter_timewait(cm_id_priv);
713 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
714 break;
715 case IB_CM_DREQ_RCVD:
716 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
717 ib_send_cm_drep(cm_id, NULL, 0);
718 break;
719 default:
720 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
721 break;
722 }
723
724 cm_free_id(cm_id->local_id);
725 atomic_dec(&cm_id_priv->refcount);
726 wait_event(cm_id_priv->wait, !atomic_read(&cm_id_priv->refcount));
727 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
728 cm_free_work(work);
729 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
730 kfree(cm_id_priv->private_data);
731 kfree(cm_id_priv);
732}
733EXPORT_SYMBOL(ib_destroy_cm_id);
734
735int ib_cm_listen(struct ib_cm_id *cm_id,
97f52eb4
SH		 736 __be64 service_id,
737 __be64 service_mask)
a977049d
HR		 738{
739 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
740 unsigned long flags;
741 int ret = 0;
742
97f52eb4
SH		 743 service_mask = service_mask ? service_mask :
744 __constant_cpu_to_be64(~0ULL);
a977049d
HR		 745 service_id &= service_mask;
746 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
747 (service_id != IB_CM_ASSIGN_SERVICE_ID))
748 return -EINVAL;
749
750 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
751 BUG_ON(cm_id->state != IB_CM_IDLE);
752
753 cm_id->state = IB_CM_LISTEN;
754
755 spin_lock_irqsave(&cm.lock, flags);
756 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
97f52eb4
SH		 757 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
758 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 759 } else {
760 cm_id->service_id = service_id;
761 cm_id->service_mask = service_mask;
762 }
763 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
764 spin_unlock_irqrestore(&cm.lock, flags);
765
766 if (cur_cm_id_priv) {
767 cm_id->state = IB_CM_IDLE;
768 ret = -EBUSY;
769 }
770 return ret;
771}
772EXPORT_SYMBOL(ib_cm_listen);
773
97f52eb4
SH		 774static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
775 enum cm_msg_sequence msg_seq)
a977049d
HR		 776{
777 u64 hi_tid, low_tid;
778
779 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
97f52eb4
SH		 780 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
781 (msg_seq << 30));
a977049d
HR		 782 return cpu_to_be64(hi_tid | low_tid);
783}
784
785static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 786 __be16 attr_id, __be64 tid)
a977049d
HR		 787{
788 hdr->base_version = IB_MGMT_BASE_VERSION;
789 hdr->mgmt_class = IB_MGMT_CLASS_CM;
790 hdr->class_version = IB_CM_CLASS_VERSION;
791 hdr->method = IB_MGMT_METHOD_SEND;
792 hdr->attr_id = attr_id;
793 hdr->tid = tid;
794}
795
796static void cm_format_req(struct cm_req_msg *req_msg,
797 struct cm_id_private *cm_id_priv,
798 struct ib_cm_req_param *param)
799{
800 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
801 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
802
803 req_msg->local_comm_id = cm_id_priv->id.local_id;
804 req_msg->service_id = param->service_id;
805 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
806 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
807 cm_req_set_resp_res(req_msg, param->responder_resources);
808 cm_req_set_init_depth(req_msg, param->initiator_depth);
809 cm_req_set_remote_resp_timeout(req_msg,
810 param->remote_cm_response_timeout);
811 cm_req_set_qp_type(req_msg, param->qp_type);
812 cm_req_set_flow_ctrl(req_msg, param->flow_control);
813 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
814 cm_req_set_local_resp_timeout(req_msg,
815 param->local_cm_response_timeout);
816 cm_req_set_retry_count(req_msg, param->retry_count);
817 req_msg->pkey = param->primary_path->pkey;
818 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
819 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
820 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
821 cm_req_set_srq(req_msg, param->srq);
822
823 req_msg->primary_local_lid = param->primary_path->slid;
824 req_msg->primary_remote_lid = param->primary_path->dlid;
825 req_msg->primary_local_gid = param->primary_path->sgid;
826 req_msg->primary_remote_gid = param->primary_path->dgid;
827 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
828 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
829 req_msg->primary_traffic_class = param->primary_path->traffic_class;
830 req_msg->primary_hop_limit = param->primary_path->hop_limit;
831 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
832 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
833 cm_req_set_primary_local_ack_timeout(req_msg,
834 min(31, param->primary_path->packet_life_time + 1));
835
836 if (param->alternate_path) {
837 req_msg->alt_local_lid = param->alternate_path->slid;
838 req_msg->alt_remote_lid = param->alternate_path->dlid;
839 req_msg->alt_local_gid = param->alternate_path->sgid;
840 req_msg->alt_remote_gid = param->alternate_path->dgid;
841 cm_req_set_alt_flow_label(req_msg,
842 param->alternate_path->flow_label);
843 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
844 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
845 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
846 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
847 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
848 cm_req_set_alt_local_ack_timeout(req_msg,
849 min(31, param->alternate_path->packet_life_time + 1));
850 }
851
852 if (param->private_data && param->private_data_len)
853 memcpy(req_msg->private_data, param->private_data,
854 param->private_data_len);
855}
856
857static inline int cm_validate_req_param(struct ib_cm_req_param *param)
858{
859 /* peer-to-peer not supported */
860 if (param->peer_to_peer)
861 return -EINVAL;
862
863 if (!param->primary_path)
864 return -EINVAL;
865
866 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
867 return -EINVAL;
868
869 if (param->private_data &&
870 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
871 return -EINVAL;
872
873 if (param->alternate_path &&
874 (param->alternate_path->pkey != param->primary_path->pkey ||
875 param->alternate_path->mtu != param->primary_path->mtu))
876 return -EINVAL;
877
878 return 0;
879}
880
881int ib_send_cm_req(struct ib_cm_id *cm_id,
882 struct ib_cm_req_param *param)
883{
884 struct cm_id_private *cm_id_priv;
885 struct ib_send_wr *bad_send_wr;
886 struct cm_req_msg *req_msg;
887 unsigned long flags;
888 int ret;
889
890 ret = cm_validate_req_param(param);
891 if (ret)
892 return ret;
893
894 /* Verify that we're not in timewait. */
895 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
896 spin_lock_irqsave(&cm_id_priv->lock, flags);
897 if (cm_id->state != IB_CM_IDLE) {
898 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
899 ret = -EINVAL;
900 goto out;
901 }
902 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
903
904 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
905 id.local_id);
906 if (IS_ERR(cm_id_priv->timewait_info))
907 goto out;
908
909 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
910 if (ret)
911 goto error1;
912 if (param->alternate_path) {
913 ret = cm_init_av_by_path(param->alternate_path,
914 &cm_id_priv->alt_av);
915 if (ret)
916 goto error1;
917 }
918 cm_id->service_id = param->service_id;
97f52eb4 919 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 920 cm_id_priv->timeout_ms = cm_convert_to_ms(
921 param->primary_path->packet_life_time) * 2 +
922 cm_convert_to_ms(
923 param->remote_cm_response_timeout);
924 cm_id_priv->max_cm_retries = param->max_cm_retries;
925 cm_id_priv->initiator_depth = param->initiator_depth;
926 cm_id_priv->responder_resources = param->responder_resources;
927 cm_id_priv->retry_count = param->retry_count;
928 cm_id_priv->path_mtu = param->primary_path->mtu;
929
930 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
931 if (ret)
932 goto error1;
933
934 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
935 cm_format_req(req_msg, cm_id_priv, param);
936 cm_id_priv->tid = req_msg->hdr.tid;
937 cm_id_priv->msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
938 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
939
940 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
941 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
942 cm_id_priv->local_ack_timeout =
943 cm_req_get_primary_local_ack_timeout(req_msg);
944
945 spin_lock_irqsave(&cm_id_priv->lock, flags);
946 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
947 &cm_id_priv->msg->send_wr, &bad_send_wr);
948 if (ret) {
949 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
950 goto error2;
951 }
952 BUG_ON(cm_id->state != IB_CM_IDLE);
953 cm_id->state = IB_CM_REQ_SENT;
954 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
955 return 0;
956
957error2: cm_free_msg(cm_id_priv->msg);
958error1: kfree(cm_id_priv->timewait_info);
959out: return ret;
960}
961EXPORT_SYMBOL(ib_send_cm_req);
962
963static int cm_issue_rej(struct cm_port *port,
964 struct ib_mad_recv_wc *mad_recv_wc,
965 enum ib_cm_rej_reason reason,
966 enum cm_msg_response msg_rejected,
967 void *ari, u8 ari_length)
968{
969 struct ib_mad_send_buf *msg = NULL;
970 struct ib_send_wr *bad_send_wr;
971 struct cm_rej_msg *rej_msg, *rcv_msg;
972 int ret;
973
974 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
975 if (ret)
976 return ret;
977
978 /* We just need common CM header information. Cast to any message. */
979 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
980 rej_msg = (struct cm_rej_msg *) msg->mad;
981
982 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
983 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
984 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
985 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 986 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 987
988 if (ari && ari_length) {
989 cm_rej_set_reject_info_len(rej_msg, ari_length);
990 memcpy(rej_msg->ari, ari, ari_length);
991 }
992
993 ret = ib_post_send_mad(port->mad_agent, &msg->send_wr, &bad_send_wr);
994 if (ret)
995 cm_free_msg(msg);
996
997 return ret;
998}
999
97f52eb4
SH		 1000static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1001 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 1002{
1003 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1004 ((local_ca_guid == remote_ca_guid) &&
1005 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1006}
1007
1008static inline void cm_format_paths_from_req(struct cm_req_msg *req_msg,
1009 struct ib_sa_path_rec *primary_path,
1010 struct ib_sa_path_rec *alt_path)
1011{
1012 memset(primary_path, 0, sizeof *primary_path);
1013 primary_path->dgid = req_msg->primary_local_gid;
1014 primary_path->sgid = req_msg->primary_remote_gid;
1015 primary_path->dlid = req_msg->primary_local_lid;
1016 primary_path->slid = req_msg->primary_remote_lid;
1017 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1018 primary_path->hop_limit = req_msg->primary_hop_limit;
1019 primary_path->traffic_class = req_msg->primary_traffic_class;
1020 primary_path->reversible = 1;
1021 primary_path->pkey = req_msg->pkey;
1022 primary_path->sl = cm_req_get_primary_sl(req_msg);
1023 primary_path->mtu_selector = IB_SA_EQ;
1024 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1025 primary_path->rate_selector = IB_SA_EQ;
1026 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1027 primary_path->packet_life_time_selector = IB_SA_EQ;
1028 primary_path->packet_life_time =
1029 cm_req_get_primary_local_ack_timeout(req_msg);
1030 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1031
1032 if (req_msg->alt_local_lid) {
1033 memset(alt_path, 0, sizeof *alt_path);
1034 alt_path->dgid = req_msg->alt_local_gid;
1035 alt_path->sgid = req_msg->alt_remote_gid;
1036 alt_path->dlid = req_msg->alt_local_lid;
1037 alt_path->slid = req_msg->alt_remote_lid;
1038 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1039 alt_path->hop_limit = req_msg->alt_hop_limit;
1040 alt_path->traffic_class = req_msg->alt_traffic_class;
1041 alt_path->reversible = 1;
1042 alt_path->pkey = req_msg->pkey;
1043 alt_path->sl = cm_req_get_alt_sl(req_msg);
1044 alt_path->mtu_selector = IB_SA_EQ;
1045 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1046 alt_path->rate_selector = IB_SA_EQ;
1047 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1048 alt_path->packet_life_time_selector = IB_SA_EQ;
1049 alt_path->packet_life_time =
1050 cm_req_get_alt_local_ack_timeout(req_msg);
1051 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1052 }
1053}
1054
1055static void cm_format_req_event(struct cm_work *work,
1056 struct cm_id_private *cm_id_priv,
1057 struct ib_cm_id *listen_id)
1058{
1059 struct cm_req_msg *req_msg;
1060 struct ib_cm_req_event_param *param;
1061
1062 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1063 param = &work->cm_event.param.req_rcvd;
1064 param->listen_id = listen_id;
a977049d
HR		 1065 param->port = cm_id_priv->av.port->port_num;
1066 param->primary_path = &work->path[0];
1067 if (req_msg->alt_local_lid)
1068 param->alternate_path = &work->path[1];
1069 else
1070 param->alternate_path = NULL;
1071 param->remote_ca_guid = req_msg->local_ca_guid;
1072 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1073 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1074 param->qp_type = cm_req_get_qp_type(req_msg);
1075 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1076 param->responder_resources = cm_req_get_init_depth(req_msg);
1077 param->initiator_depth = cm_req_get_resp_res(req_msg);
1078 param->local_cm_response_timeout =
1079 cm_req_get_remote_resp_timeout(req_msg);
1080 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1081 param->remote_cm_response_timeout =
1082 cm_req_get_local_resp_timeout(req_msg);
1083 param->retry_count = cm_req_get_retry_count(req_msg);
1084 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1085 param->srq = cm_req_get_srq(req_msg);
1086 work->cm_event.private_data = &req_msg->private_data;
1087}
1088
1089static void cm_process_work(struct cm_id_private *cm_id_priv,
1090 struct cm_work *work)
1091{
1092 unsigned long flags;
1093 int ret;
1094
1095 /* We will typically only have the current event to report. */
1096 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1097 cm_free_work(work);
1098
1099 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1100 spin_lock_irqsave(&cm_id_priv->lock, flags);
1101 work = cm_dequeue_work(cm_id_priv);
1102 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1103 BUG_ON(!work);
1104 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1105 &work->cm_event);
1106 cm_free_work(work);
1107 }
1108 cm_deref_id(cm_id_priv);
1109 if (ret)
1110 ib_destroy_cm_id(&cm_id_priv->id);
1111}
1112
1113static void cm_format_mra(struct cm_mra_msg *mra_msg,
1114 struct cm_id_private *cm_id_priv,
1115 enum cm_msg_response msg_mraed, u8 service_timeout,
1116 const void *private_data, u8 private_data_len)
1117{
1118 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1119 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1120 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1121 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1122 cm_mra_set_service_timeout(mra_msg, service_timeout);
1123
1124 if (private_data && private_data_len)
1125 memcpy(mra_msg->private_data, private_data, private_data_len);
1126}
1127
1128static void cm_format_rej(struct cm_rej_msg *rej_msg,
1129 struct cm_id_private *cm_id_priv,
1130 enum ib_cm_rej_reason reason,
1131 void *ari,
1132 u8 ari_length,
1133 const void *private_data,
1134 u8 private_data_len)
1135{
1136 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1137 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1138
1139 switch(cm_id_priv->id.state) {
1140 case IB_CM_REQ_RCVD:
1141 rej_msg->local_comm_id = 0;
1142 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1143 break;
1144 case IB_CM_MRA_REQ_SENT:
1145 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1146 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1147 break;
1148 case IB_CM_REP_RCVD:
1149 case IB_CM_MRA_REP_SENT:
1150 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1151 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1152 break;
1153 default:
1154 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1155 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1156 break;
1157 }
1158
97f52eb4 1159 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1160 if (ari && ari_length) {
1161 cm_rej_set_reject_info_len(rej_msg, ari_length);
1162 memcpy(rej_msg->ari, ari, ari_length);
1163 }
1164
1165 if (private_data && private_data_len)
1166 memcpy(rej_msg->private_data, private_data, private_data_len);
1167}
1168
1169static void cm_dup_req_handler(struct cm_work *work,
1170 struct cm_id_private *cm_id_priv)
1171{
1172 struct ib_mad_send_buf *msg = NULL;
1173 struct ib_send_wr *bad_send_wr;
1174 unsigned long flags;
1175 int ret;
1176
1177 /* Quick state check to discard duplicate REQs. */
1178 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1179 return;
1180
1181 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1182 if (ret)
1183 return;
1184
1185 spin_lock_irqsave(&cm_id_priv->lock, flags);
1186 switch (cm_id_priv->id.state) {
1187 case IB_CM_MRA_REQ_SENT:
1188 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1189 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1190 cm_id_priv->private_data,
1191 cm_id_priv->private_data_len);
1192 break;
1193 case IB_CM_TIMEWAIT:
1194 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1195 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1196 break;
1197 default:
1198 goto unlock;
1199 }
1200 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1201
1202 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr,
1203 &bad_send_wr);
1204 if (ret)
1205 goto free;
1206 return;
1207
1208unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1209free: cm_free_msg(msg);
1210}
1211
1212static struct cm_id_private * cm_match_req(struct cm_work *work,
1213 struct cm_id_private *cm_id_priv)
1214{
1215 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1216 struct cm_timewait_info *timewait_info;
1217 struct cm_req_msg *req_msg;
1218 unsigned long flags;
1219
1220 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1221
1222 /* Check for duplicate REQ and stale connections. */
1223 spin_lock_irqsave(&cm.lock, flags);
1224 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1225 if (!timewait_info)
1226 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1227
1228 if (timewait_info) {
1229 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1230 timewait_info->work.remote_id);
1231 spin_unlock_irqrestore(&cm.lock, flags);
1232 if (cur_cm_id_priv) {
1233 cm_dup_req_handler(work, cur_cm_id_priv);
1234 cm_deref_id(cur_cm_id_priv);
1235 } else
1236 cm_issue_rej(work->port, work->mad_recv_wc,
1237 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1238 NULL, 0);
1239 goto error;
1240 }
1241
1242 /* Find matching listen request. */
07d357d0
SH		 1243 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
1244 req_msg->service_id);
a977049d
HR		 1245 if (!listen_cm_id_priv) {
1246 spin_unlock_irqrestore(&cm.lock, flags);
1247 cm_issue_rej(work->port, work->mad_recv_wc,
1248 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1249 NULL, 0);
1250 goto error;
1251 }
1252 atomic_inc(&listen_cm_id_priv->refcount);
1253 atomic_inc(&cm_id_priv->refcount);
1254 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1255 atomic_inc(&cm_id_priv->work_count);
1256 spin_unlock_irqrestore(&cm.lock, flags);
1257 return listen_cm_id_priv;
1258
1259error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1260 return NULL;
1261}
1262
1263static int cm_req_handler(struct cm_work *work)
1264{
1265 struct ib_cm_id *cm_id;
1266 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1267 struct cm_req_msg *req_msg;
1268 int ret;
1269
1270 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1271
07d357d0 1272 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 1273 if (IS_ERR(cm_id))
1274 return PTR_ERR(cm_id);
1275
1276 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1277 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1278 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
1279 &cm_id_priv->av);
1280 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1281 id.local_id);
1282 if (IS_ERR(cm_id_priv->timewait_info)) {
1283 ret = PTR_ERR(cm_id_priv->timewait_info);
1284 goto error1;
1285 }
1286 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1287 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1288 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1289
1290 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1291 if (!listen_cm_id_priv) {
1292 ret = -EINVAL;
1293 goto error2;
1294 }
1295
1296 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1297 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1298 cm_id_priv->id.service_id = req_msg->service_id;
97f52eb4 1299 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1300
1301 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1302 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1303 if (ret)
1304 goto error3;
1305 if (req_msg->alt_local_lid) {
1306 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1307 if (ret)
1308 goto error3;
1309 }
1310 cm_id_priv->tid = req_msg->hdr.tid;
1311 cm_id_priv->timeout_ms = cm_convert_to_ms(
1312 cm_req_get_local_resp_timeout(req_msg));
1313 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1314 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1315 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1316 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1317 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1318 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1319 cm_id_priv->local_ack_timeout =
1320 cm_req_get_primary_local_ack_timeout(req_msg);
1321 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1322 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1323
1324 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1325 cm_process_work(cm_id_priv, work);
1326 cm_deref_id(listen_cm_id_priv);
1327 return 0;
1328
1329error3: atomic_dec(&cm_id_priv->refcount);
1330 cm_deref_id(listen_cm_id_priv);
1331 cm_cleanup_timewait(cm_id_priv->timewait_info);
1332error2: kfree(cm_id_priv->timewait_info);
1b205c2d 1333 cm_id_priv->timewait_info = NULL;
a977049d
HR		 1334error1: ib_destroy_cm_id(&cm_id_priv->id);
1335 return ret;
1336}
1337
1338static void cm_format_rep(struct cm_rep_msg *rep_msg,
1339 struct cm_id_private *cm_id_priv,
1340 struct ib_cm_rep_param *param)
1341{
1342 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1343 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1344 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1345 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1346 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1347 rep_msg->resp_resources = param->responder_resources;
1348 rep_msg->initiator_depth = param->initiator_depth;
1349 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1350 cm_rep_set_failover(rep_msg, param->failover_accepted);
1351 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1352 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1353 cm_rep_set_srq(rep_msg, param->srq);
1354 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1355
1356 if (param->private_data && param->private_data_len)
1357 memcpy(rep_msg->private_data, param->private_data,
1358 param->private_data_len);
1359}
1360
1361int ib_send_cm_rep(struct ib_cm_id *cm_id,
1362 struct ib_cm_rep_param *param)
1363{
1364 struct cm_id_private *cm_id_priv;
1365 struct ib_mad_send_buf *msg;
1366 struct cm_rep_msg *rep_msg;
1367 struct ib_send_wr *bad_send_wr;
1368 unsigned long flags;
1369 int ret;
1370
1371 if (param->private_data &&
1372 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1373 return -EINVAL;
1374
1375 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1376 spin_lock_irqsave(&cm_id_priv->lock, flags);
1377 if (cm_id->state != IB_CM_REQ_RCVD &&
1378 cm_id->state != IB_CM_MRA_REQ_SENT) {
1379 ret = -EINVAL;
1380 goto out;
1381 }
1382
1383 ret = cm_alloc_msg(cm_id_priv, &msg);
1384 if (ret)
1385 goto out;
1386
1387 rep_msg = (struct cm_rep_msg *) msg->mad;
1388 cm_format_rep(rep_msg, cm_id_priv, param);
1389 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
1390 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1391
1392 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1393 &msg->send_wr, &bad_send_wr);
1394 if (ret) {
1395 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1396 cm_free_msg(msg);
1397 return ret;
1398 }
1399
1400 cm_id->state = IB_CM_REP_SENT;
1401 cm_id_priv->msg = msg;
1402 cm_id_priv->initiator_depth = param->initiator_depth;
1403 cm_id_priv->responder_resources = param->responder_resources;
1404 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1405 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1406
1407out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1408 return ret;
1409}
1410EXPORT_SYMBOL(ib_send_cm_rep);
1411
1412static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1413 struct cm_id_private *cm_id_priv,
1414 const void *private_data,
1415 u8 private_data_len)
1416{
1417 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1418 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1419 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1420
1421 if (private_data && private_data_len)
1422 memcpy(rtu_msg->private_data, private_data, private_data_len);
1423}
1424
1425int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1426 const void *private_data,
1427 u8 private_data_len)
1428{
1429 struct cm_id_private *cm_id_priv;
1430 struct ib_mad_send_buf *msg;
1431 struct ib_send_wr *bad_send_wr;
1432 unsigned long flags;
1433 void *data;
1434 int ret;
1435
1436 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1437 return -EINVAL;
1438
1439 data = cm_copy_private_data(private_data, private_data_len);
1440 if (IS_ERR(data))
1441 return PTR_ERR(data);
1442
1443 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1444 spin_lock_irqsave(&cm_id_priv->lock, flags);
1445 if (cm_id->state != IB_CM_REP_RCVD &&
1446 cm_id->state != IB_CM_MRA_REP_SENT) {
1447 ret = -EINVAL;
1448 goto error;
1449 }
1450
1451 ret = cm_alloc_msg(cm_id_priv, &msg);
1452 if (ret)
1453 goto error;
1454
1455 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1456 private_data, private_data_len);
1457
1458 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1459 &msg->send_wr, &bad_send_wr);
1460 if (ret) {
1461 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1462 cm_free_msg(msg);
1463 kfree(data);
1464 return ret;
1465 }
1466
1467 cm_id->state = IB_CM_ESTABLISHED;
1468 cm_set_private_data(cm_id_priv, data, private_data_len);
1469 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1470 return 0;
1471
1472error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1473 kfree(data);
1474 return ret;
1475}
1476EXPORT_SYMBOL(ib_send_cm_rtu);
1477
1478static void cm_format_rep_event(struct cm_work *work)
1479{
1480 struct cm_rep_msg *rep_msg;
1481 struct ib_cm_rep_event_param *param;
1482
1483 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1484 param = &work->cm_event.param.rep_rcvd;
1485 param->remote_ca_guid = rep_msg->local_ca_guid;
1486 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1487 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1488 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1489 param->responder_resources = rep_msg->initiator_depth;
1490 param->initiator_depth = rep_msg->resp_resources;
1491 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1492 param->failover_accepted = cm_rep_get_failover(rep_msg);
1493 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1494 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1495 param->srq = cm_rep_get_srq(rep_msg);
1496 work->cm_event.private_data = &rep_msg->private_data;
1497}
1498
1499static void cm_dup_rep_handler(struct cm_work *work)
1500{
1501 struct cm_id_private *cm_id_priv;
1502 struct cm_rep_msg *rep_msg;
1503 struct ib_mad_send_buf *msg = NULL;
1504 struct ib_send_wr *bad_send_wr;
1505 unsigned long flags;
1506 int ret;
1507
1508 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1509 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1510 rep_msg->local_comm_id);
1511 if (!cm_id_priv)
1512 return;
1513
1514 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1515 if (ret)
1516 goto deref;
1517
1518 spin_lock_irqsave(&cm_id_priv->lock, flags);
1519 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1520 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1521 cm_id_priv->private_data,
1522 cm_id_priv->private_data_len);
1523 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1524 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1525 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1526 cm_id_priv->private_data,
1527 cm_id_priv->private_data_len);
1528 else
1529 goto unlock;
1530 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1531
1532 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr,
1533 &bad_send_wr);
1534 if (ret)
1535 goto free;
1536 goto deref;
1537
1538unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1539free: cm_free_msg(msg);
1540deref: cm_deref_id(cm_id_priv);
1541}
1542
1543static int cm_rep_handler(struct cm_work *work)
1544{
1545 struct cm_id_private *cm_id_priv;
1546 struct cm_rep_msg *rep_msg;
1547 unsigned long flags;
1548 int ret;
1549
1550 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1551 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1552 if (!cm_id_priv) {
1553 cm_dup_rep_handler(work);
1554 return -EINVAL;
1555 }
1556
1557 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1558 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1559 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1560
1561 spin_lock_irqsave(&cm.lock, flags);
1562 /* Check for duplicate REP. */
1563 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
1564 spin_unlock_irqrestore(&cm.lock, flags);
1565 ret = -EINVAL;
1566 goto error;
1567 }
1568 /* Check for a stale connection. */
1569 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
1570 spin_unlock_irqrestore(&cm.lock, flags);
1571 cm_issue_rej(work->port, work->mad_recv_wc,
1572 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1573 NULL, 0);
1574 ret = -EINVAL;
1575 goto error;
1576 }
1577 spin_unlock_irqrestore(&cm.lock, flags);
1578
1579 cm_format_rep_event(work);
1580
1581 spin_lock_irqsave(&cm_id_priv->lock, flags);
1582 switch (cm_id_priv->id.state) {
1583 case IB_CM_REQ_SENT:
1584 case IB_CM_MRA_REQ_RCVD:
1585 break;
1586 default:
1587 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1588 ret = -EINVAL;
1589 goto error;
1590 }
1591 cm_id_priv->id.state = IB_CM_REP_RCVD;
1592 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1593 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1594 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1595 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1596 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1597 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1598
1599 /* todo: handle peer_to_peer */
1600
1601 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1602 (unsigned long) cm_id_priv->msg);
1603 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1604 if (!ret)
1605 list_add_tail(&work->list, &cm_id_priv->work_list);
1606 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1607
1608 if (ret)
1609 cm_process_work(cm_id_priv, work);
1610 else
1611 cm_deref_id(cm_id_priv);
1612 return 0;
1613
1614error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1615 cm_deref_id(cm_id_priv);
1616 return ret;
1617}
1618
1619static int cm_establish_handler(struct cm_work *work)
1620{
1621 struct cm_id_private *cm_id_priv;
1622 unsigned long flags;
1623 int ret;
1624
1625 /* See comment in ib_cm_establish about lookup. */
1626 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1627 if (!cm_id_priv)
1628 return -EINVAL;
1629
1630 spin_lock_irqsave(&cm_id_priv->lock, flags);
1631 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1632 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1633 goto out;
1634 }
1635
1636 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1637 (unsigned long) cm_id_priv->msg);
1638 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1639 if (!ret)
1640 list_add_tail(&work->list, &cm_id_priv->work_list);
1641 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1642
1643 if (ret)
1644 cm_process_work(cm_id_priv, work);
1645 else
1646 cm_deref_id(cm_id_priv);
1647 return 0;
1648out:
1649 cm_deref_id(cm_id_priv);
1650 return -EINVAL;
1651}
1652
1653static int cm_rtu_handler(struct cm_work *work)
1654{
1655 struct cm_id_private *cm_id_priv;
1656 struct cm_rtu_msg *rtu_msg;
1657 unsigned long flags;
1658 int ret;
1659
1660 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1661 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1662 rtu_msg->local_comm_id);
1663 if (!cm_id_priv)
1664 return -EINVAL;
1665
1666 work->cm_event.private_data = &rtu_msg->private_data;
1667
1668 spin_lock_irqsave(&cm_id_priv->lock, flags);
1669 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1670 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1671 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1672 goto out;
1673 }
1674 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1675
1676 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1677 (unsigned long) cm_id_priv->msg);
1678 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1679 if (!ret)
1680 list_add_tail(&work->list, &cm_id_priv->work_list);
1681 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1682
1683 if (ret)
1684 cm_process_work(cm_id_priv, work);
1685 else
1686 cm_deref_id(cm_id_priv);
1687 return 0;
1688out:
1689 cm_deref_id(cm_id_priv);
1690 return -EINVAL;
1691}
1692
1693static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1694 struct cm_id_private *cm_id_priv,
1695 const void *private_data,
1696 u8 private_data_len)
1697{
1698 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1699 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1700 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1701 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1702 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1703
1704 if (private_data && private_data_len)
1705 memcpy(dreq_msg->private_data, private_data, private_data_len);
1706}
1707
1708int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1709 const void *private_data,
1710 u8 private_data_len)
1711{
1712 struct cm_id_private *cm_id_priv;
1713 struct ib_mad_send_buf *msg;
1714 struct ib_send_wr *bad_send_wr;
1715 unsigned long flags;
1716 int ret;
1717
1718 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1719 return -EINVAL;
1720
1721 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1722 spin_lock_irqsave(&cm_id_priv->lock, flags);
1723 if (cm_id->state != IB_CM_ESTABLISHED) {
1724 ret = -EINVAL;
1725 goto out;
1726 }
1727
1728 ret = cm_alloc_msg(cm_id_priv, &msg);
1729 if (ret) {
1730 cm_enter_timewait(cm_id_priv);
1731 goto out;
1732 }
1733
1734 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1735 private_data, private_data_len);
1736 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
1737 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1738
1739 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1740 &msg->send_wr, &bad_send_wr);
1741 if (ret) {
1742 cm_enter_timewait(cm_id_priv);
1743 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1744 cm_free_msg(msg);
1745 return ret;
1746 }
1747
1748 cm_id->state = IB_CM_DREQ_SENT;
1749 cm_id_priv->msg = msg;
1750out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1751 return ret;
1752}
1753EXPORT_SYMBOL(ib_send_cm_dreq);
1754
1755static void cm_format_drep(struct cm_drep_msg *drep_msg,
1756 struct cm_id_private *cm_id_priv,
1757 const void *private_data,
1758 u8 private_data_len)
1759{
1760 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1761 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1762 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1763
1764 if (private_data && private_data_len)
1765 memcpy(drep_msg->private_data, private_data, private_data_len);
1766}
1767
1768int ib_send_cm_drep(struct ib_cm_id *cm_id,
1769 const void *private_data,
1770 u8 private_data_len)
1771{
1772 struct cm_id_private *cm_id_priv;
1773 struct ib_mad_send_buf *msg;
1774 struct ib_send_wr *bad_send_wr;
1775 unsigned long flags;
1776 void *data;
1777 int ret;
1778
1779 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1780 return -EINVAL;
1781
1782 data = cm_copy_private_data(private_data, private_data_len);
1783 if (IS_ERR(data))
1784 return PTR_ERR(data);
1785
1786 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1787 spin_lock_irqsave(&cm_id_priv->lock, flags);
1788 if (cm_id->state != IB_CM_DREQ_RCVD) {
1789 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1790 kfree(data);
1791 return -EINVAL;
1792 }
1793
1794 cm_set_private_data(cm_id_priv, data, private_data_len);
1795 cm_enter_timewait(cm_id_priv);
1796
1797 ret = cm_alloc_msg(cm_id_priv, &msg);
1798 if (ret)
1799 goto out;
1800
1801 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1802 private_data, private_data_len);
1803
1804 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr,
1805 &bad_send_wr);
1806 if (ret) {
1807 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1808 cm_free_msg(msg);
1809 return ret;
1810 }
1811
1812out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1813 return ret;
1814}
1815EXPORT_SYMBOL(ib_send_cm_drep);
1816
1817static int cm_dreq_handler(struct cm_work *work)
1818{
1819 struct cm_id_private *cm_id_priv;
1820 struct cm_dreq_msg *dreq_msg;
1821 struct ib_mad_send_buf *msg = NULL;
1822 struct ib_send_wr *bad_send_wr;
1823 unsigned long flags;
1824 int ret;
1825
1826 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1827 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1828 dreq_msg->local_comm_id);
1829 if (!cm_id_priv)
1830 return -EINVAL;
1831
1832 work->cm_event.private_data = &dreq_msg->private_data;
1833
1834 spin_lock_irqsave(&cm_id_priv->lock, flags);
1835 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1836 goto unlock;
1837
1838 switch (cm_id_priv->id.state) {
1839 case IB_CM_REP_SENT:
1840 case IB_CM_DREQ_SENT:
1841 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1842 (unsigned long) cm_id_priv->msg);
1843 break;
1844 case IB_CM_ESTABLISHED:
1845 case IB_CM_MRA_REP_RCVD:
1846 break;
1847 case IB_CM_TIMEWAIT:
1848 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1849 goto unlock;
1850
1851 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1852 cm_id_priv->private_data,
1853 cm_id_priv->private_data_len);
1854 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1855
1856 if (ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1857 &msg->send_wr, &bad_send_wr))
1858 cm_free_msg(msg);
1859 goto deref;
1860 default:
1861 goto unlock;
1862 }
1863 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1864 cm_id_priv->tid = dreq_msg->hdr.tid;
1865 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1866 if (!ret)
1867 list_add_tail(&work->list, &cm_id_priv->work_list);
1868 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1869
1870 if (ret)
1871 cm_process_work(cm_id_priv, work);
1872 else
1873 cm_deref_id(cm_id_priv);
1874 return 0;
1875
1876unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1877deref: cm_deref_id(cm_id_priv);
1878 return -EINVAL;
1879}
1880
1881static int cm_drep_handler(struct cm_work *work)
1882{
1883 struct cm_id_private *cm_id_priv;
1884 struct cm_drep_msg *drep_msg;
1885 unsigned long flags;
1886 int ret;
1887
1888 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
1889 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
1890 drep_msg->local_comm_id);
1891 if (!cm_id_priv)
1892 return -EINVAL;
1893
1894 work->cm_event.private_data = &drep_msg->private_data;
1895
1896 spin_lock_irqsave(&cm_id_priv->lock, flags);
1897 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
1898 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
1899 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1900 goto out;
1901 }
1902 cm_enter_timewait(cm_id_priv);
1903
1904 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
1905 (unsigned long) cm_id_priv->msg);
1906 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1907 if (!ret)
1908 list_add_tail(&work->list, &cm_id_priv->work_list);
1909 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1910
1911 if (ret)
1912 cm_process_work(cm_id_priv, work);
1913 else
1914 cm_deref_id(cm_id_priv);
1915 return 0;
1916out:
1917 cm_deref_id(cm_id_priv);
1918 return -EINVAL;
1919}
1920
1921int ib_send_cm_rej(struct ib_cm_id *cm_id,
1922 enum ib_cm_rej_reason reason,
1923 void *ari,
1924 u8 ari_length,
1925 const void *private_data,
1926 u8 private_data_len)
1927{
1928 struct cm_id_private *cm_id_priv;
1929 struct ib_mad_send_buf *msg;
1930 struct ib_send_wr *bad_send_wr;
1931 unsigned long flags;
1932 int ret;
1933
1934 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
1935 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
1936 return -EINVAL;
1937
1938 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1939
1940 spin_lock_irqsave(&cm_id_priv->lock, flags);
1941 switch (cm_id->state) {
1942 case IB_CM_REQ_SENT:
1943 case IB_CM_MRA_REQ_RCVD:
1944 case IB_CM_REQ_RCVD:
1945 case IB_CM_MRA_REQ_SENT:
1946 case IB_CM_REP_RCVD:
1947 case IB_CM_MRA_REP_SENT:
1948 ret = cm_alloc_msg(cm_id_priv, &msg);
1949 if (!ret)
1950 cm_format_rej((struct cm_rej_msg *) msg->mad,
1951 cm_id_priv, reason, ari, ari_length,
1952 private_data, private_data_len);
1953
1954 cm_reset_to_idle(cm_id_priv);
1955 break;
1956 case IB_CM_REP_SENT:
1957 case IB_CM_MRA_REP_RCVD:
1958 ret = cm_alloc_msg(cm_id_priv, &msg);
1959 if (!ret)
1960 cm_format_rej((struct cm_rej_msg *) msg->mad,
1961 cm_id_priv, reason, ari, ari_length,
1962 private_data, private_data_len);
1963
1964 cm_enter_timewait(cm_id_priv);
1965 break;
1966 default:
1967 ret = -EINVAL;
1968 goto out;
1969 }
1970
1971 if (ret)
1972 goto out;
1973
1974 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
1975 &msg->send_wr, &bad_send_wr);
1976 if (ret)
1977 cm_free_msg(msg);
1978
1979out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1980 return ret;
1981}
1982EXPORT_SYMBOL(ib_send_cm_rej);
1983
1984static void cm_format_rej_event(struct cm_work *work)
1985{
1986 struct cm_rej_msg *rej_msg;
1987 struct ib_cm_rej_event_param *param;
1988
1989 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
1990 param = &work->cm_event.param.rej_rcvd;
1991 param->ari = rej_msg->ari;
1992 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 1993 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 1994 work->cm_event.private_data = &rej_msg->private_data;
1995}
1996
1997static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
1998{
1999 struct cm_timewait_info *timewait_info;
2000 struct cm_id_private *cm_id_priv;
2001 unsigned long flags;
97f52eb4 2002 __be32 remote_id;
a977049d
HR		 2003
2004 remote_id = rej_msg->local_comm_id;
2005
97f52eb4 2006 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
a977049d 2007 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 2008 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 2009 remote_id);
2010 if (!timewait_info) {
2011 spin_unlock_irqrestore(&cm.lock, flags);
2012 return NULL;
2013 }
2014 cm_id_priv = idr_find(&cm.local_id_table,
97f52eb4 2015 (__force int) timewait_info->work.local_id);
a977049d
HR		 2016 if (cm_id_priv) {
2017 if (cm_id_priv->id.remote_id == remote_id)
2018 atomic_inc(&cm_id_priv->refcount);
2019 else
2020 cm_id_priv = NULL;
2021 }
2022 spin_unlock_irqrestore(&cm.lock, flags);
2023 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2024 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2025 else
2026 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2027
2028 return cm_id_priv;
2029}
2030
2031static int cm_rej_handler(struct cm_work *work)
2032{
2033 struct cm_id_private *cm_id_priv;
2034 struct cm_rej_msg *rej_msg;
2035 unsigned long flags;
2036 int ret;
2037
2038 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2039 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2040 if (!cm_id_priv)
2041 return -EINVAL;
2042
2043 cm_format_rej_event(work);
2044
2045 spin_lock_irqsave(&cm_id_priv->lock, flags);
2046 switch (cm_id_priv->id.state) {
2047 case IB_CM_REQ_SENT:
2048 case IB_CM_MRA_REQ_RCVD:
2049 case IB_CM_REP_SENT:
2050 case IB_CM_MRA_REP_RCVD:
2051 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2052 (unsigned long) cm_id_priv->msg);
2053 /* fall through */
2054 case IB_CM_REQ_RCVD:
2055 case IB_CM_MRA_REQ_SENT:
97f52eb4 2056 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2057 cm_enter_timewait(cm_id_priv);
2058 else
2059 cm_reset_to_idle(cm_id_priv);
2060 break;
2061 case IB_CM_DREQ_SENT:
2062 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2063 (unsigned long) cm_id_priv->msg);
2064 /* fall through */
2065 case IB_CM_REP_RCVD:
2066 case IB_CM_MRA_REP_SENT:
2067 case IB_CM_ESTABLISHED:
2068 cm_enter_timewait(cm_id_priv);
2069 break;
2070 default:
2071 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2072 ret = -EINVAL;
2073 goto out;
2074 }
2075
2076 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2077 if (!ret)
2078 list_add_tail(&work->list, &cm_id_priv->work_list);
2079 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2080
2081 if (ret)
2082 cm_process_work(cm_id_priv, work);
2083 else
2084 cm_deref_id(cm_id_priv);
2085 return 0;
2086out:
2087 cm_deref_id(cm_id_priv);
2088 return -EINVAL;
2089}
2090
2091int ib_send_cm_mra(struct ib_cm_id *cm_id,
2092 u8 service_timeout,
2093 const void *private_data,
2094 u8 private_data_len)
2095{
2096 struct cm_id_private *cm_id_priv;
2097 struct ib_mad_send_buf *msg;
2098 struct ib_send_wr *bad_send_wr;
2099 void *data;
2100 unsigned long flags;
2101 int ret;
2102
2103 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2104 return -EINVAL;
2105
2106 data = cm_copy_private_data(private_data, private_data_len);
2107 if (IS_ERR(data))
2108 return PTR_ERR(data);
2109
2110 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2111
2112 spin_lock_irqsave(&cm_id_priv->lock, flags);
2113 switch(cm_id_priv->id.state) {
2114 case IB_CM_REQ_RCVD:
2115 ret = cm_alloc_msg(cm_id_priv, &msg);
2116 if (ret)
2117 goto error1;
2118
2119 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2120 CM_MSG_RESPONSE_REQ, service_timeout,
2121 private_data, private_data_len);
2122 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2123 &msg->send_wr, &bad_send_wr);
2124 if (ret)
2125 goto error2;
2126 cm_id->state = IB_CM_MRA_REQ_SENT;
2127 break;
2128 case IB_CM_REP_RCVD:
2129 ret = cm_alloc_msg(cm_id_priv, &msg);
2130 if (ret)
2131 goto error1;
2132
2133 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2134 CM_MSG_RESPONSE_REP, service_timeout,
2135 private_data, private_data_len);
2136 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2137 &msg->send_wr, &bad_send_wr);
2138 if (ret)
2139 goto error2;
2140 cm_id->state = IB_CM_MRA_REP_SENT;
2141 break;
2142 case IB_CM_ESTABLISHED:
2143 ret = cm_alloc_msg(cm_id_priv, &msg);
2144 if (ret)
2145 goto error1;
2146
2147 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2148 CM_MSG_RESPONSE_OTHER, service_timeout,
2149 private_data, private_data_len);
2150 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2151 &msg->send_wr, &bad_send_wr);
2152 if (ret)
2153 goto error2;
2154 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2155 break;
2156 default:
2157 ret = -EINVAL;
2158 goto error1;
2159 }
2160 cm_id_priv->service_timeout = service_timeout;
2161 cm_set_private_data(cm_id_priv, data, private_data_len);
2162 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2163 return 0;
2164
2165error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2166 kfree(data);
2167 return ret;
2168
2169error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2170 kfree(data);
2171 cm_free_msg(msg);
2172 return ret;
2173}
2174EXPORT_SYMBOL(ib_send_cm_mra);
2175
2176static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2177{
2178 switch (cm_mra_get_msg_mraed(mra_msg)) {
2179 case CM_MSG_RESPONSE_REQ:
2180 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2181 case CM_MSG_RESPONSE_REP:
2182 case CM_MSG_RESPONSE_OTHER:
2183 return cm_acquire_id(mra_msg->remote_comm_id,
2184 mra_msg->local_comm_id);
2185 default:
2186 return NULL;
2187 }
2188}
2189
2190static int cm_mra_handler(struct cm_work *work)
2191{
2192 struct cm_id_private *cm_id_priv;
2193 struct cm_mra_msg *mra_msg;
2194 unsigned long flags;
2195 int timeout, ret;
2196
2197 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2198 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2199 if (!cm_id_priv)
2200 return -EINVAL;
2201
2202 work->cm_event.private_data = &mra_msg->private_data;
2203 work->cm_event.param.mra_rcvd.service_timeout =
2204 cm_mra_get_service_timeout(mra_msg);
2205 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2206 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2207
2208 spin_lock_irqsave(&cm_id_priv->lock, flags);
2209 switch (cm_id_priv->id.state) {
2210 case IB_CM_REQ_SENT:
2211 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2212 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2213 (unsigned long) cm_id_priv->msg, timeout))
2214 goto out;
2215 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2216 break;
2217 case IB_CM_REP_SENT:
2218 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2219 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2220 (unsigned long) cm_id_priv->msg, timeout))
2221 goto out;
2222 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2223 break;
2224 case IB_CM_ESTABLISHED:
2225 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2226 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2227 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2228 (unsigned long) cm_id_priv->msg, timeout))
2229 goto out;
2230 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2231 break;
2232 default:
2233 goto out;
2234 }
2235
2236 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2237 cm_id_priv->id.state;
2238 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2239 if (!ret)
2240 list_add_tail(&work->list, &cm_id_priv->work_list);
2241 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2242
2243 if (ret)
2244 cm_process_work(cm_id_priv, work);
2245 else
2246 cm_deref_id(cm_id_priv);
2247 return 0;
2248out:
2249 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2250 cm_deref_id(cm_id_priv);
2251 return -EINVAL;
2252}
2253
2254static void cm_format_lap(struct cm_lap_msg *lap_msg,
2255 struct cm_id_private *cm_id_priv,
2256 struct ib_sa_path_rec *alternate_path,
2257 const void *private_data,
2258 u8 private_data_len)
2259{
2260 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2261 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2262 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2263 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2264 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2265 /* todo: need remote CM response timeout */
2266 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2267 lap_msg->alt_local_lid = alternate_path->slid;
2268 lap_msg->alt_remote_lid = alternate_path->dlid;
2269 lap_msg->alt_local_gid = alternate_path->sgid;
2270 lap_msg->alt_remote_gid = alternate_path->dgid;
2271 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2272 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2273 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2274 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2275 cm_lap_set_sl(lap_msg, alternate_path->sl);
2276 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2277 cm_lap_set_local_ack_timeout(lap_msg,
2278 min(31, alternate_path->packet_life_time + 1));
2279
2280 if (private_data && private_data_len)
2281 memcpy(lap_msg->private_data, private_data, private_data_len);
2282}
2283
2284int ib_send_cm_lap(struct ib_cm_id *cm_id,
2285 struct ib_sa_path_rec *alternate_path,
2286 const void *private_data,
2287 u8 private_data_len)
2288{
2289 struct cm_id_private *cm_id_priv;
2290 struct ib_mad_send_buf *msg;
2291 struct ib_send_wr *bad_send_wr;
2292 unsigned long flags;
2293 int ret;
2294
2295 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2296 return -EINVAL;
2297
2298 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2299 spin_lock_irqsave(&cm_id_priv->lock, flags);
2300 if (cm_id->state != IB_CM_ESTABLISHED ||
2301 cm_id->lap_state != IB_CM_LAP_IDLE) {
2302 ret = -EINVAL;
2303 goto out;
2304 }
2305
2306 ret = cm_alloc_msg(cm_id_priv, &msg);
2307 if (ret)
2308 goto out;
2309
2310 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2311 alternate_path, private_data, private_data_len);
2312 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
2313 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2314
2315 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2316 &msg->send_wr, &bad_send_wr);
2317 if (ret) {
2318 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2319 cm_free_msg(msg);
2320 return ret;
2321 }
2322
2323 cm_id->lap_state = IB_CM_LAP_SENT;
2324 cm_id_priv->msg = msg;
2325
2326out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2327 return ret;
2328}
2329EXPORT_SYMBOL(ib_send_cm_lap);
2330
2331static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2332 struct cm_lap_msg *lap_msg)
2333{
2334 memset(path, 0, sizeof *path);
2335 path->dgid = lap_msg->alt_local_gid;
2336 path->sgid = lap_msg->alt_remote_gid;
2337 path->dlid = lap_msg->alt_local_lid;
2338 path->slid = lap_msg->alt_remote_lid;
2339 path->flow_label = cm_lap_get_flow_label(lap_msg);
2340 path->hop_limit = lap_msg->alt_hop_limit;
2341 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2342 path->reversible = 1;
2343 /* pkey is same as in REQ */
2344 path->sl = cm_lap_get_sl(lap_msg);
2345 path->mtu_selector = IB_SA_EQ;
2346 /* mtu is same as in REQ */
2347 path->rate_selector = IB_SA_EQ;
2348 path->rate = cm_lap_get_packet_rate(lap_msg);
2349 path->packet_life_time_selector = IB_SA_EQ;
2350 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2351 path->packet_life_time -= (path->packet_life_time > 0);
2352}
2353
2354static int cm_lap_handler(struct cm_work *work)
2355{
2356 struct cm_id_private *cm_id_priv;
2357 struct cm_lap_msg *lap_msg;
2358 struct ib_cm_lap_event_param *param;
2359 struct ib_mad_send_buf *msg = NULL;
2360 struct ib_send_wr *bad_send_wr;
2361 unsigned long flags;
2362 int ret;
2363
2364 /* todo: verify LAP request and send reject APR if invalid. */
2365 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2366 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2367 lap_msg->local_comm_id);
2368 if (!cm_id_priv)
2369 return -EINVAL;
2370
2371 param = &work->cm_event.param.lap_rcvd;
2372 param->alternate_path = &work->path[0];
2373 cm_format_path_from_lap(param->alternate_path, lap_msg);
2374 work->cm_event.private_data = &lap_msg->private_data;
2375
2376 spin_lock_irqsave(&cm_id_priv->lock, flags);
2377 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2378 goto unlock;
2379
2380 switch (cm_id_priv->id.lap_state) {
2381 case IB_CM_LAP_IDLE:
2382 break;
2383 case IB_CM_MRA_LAP_SENT:
2384 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2385 goto unlock;
2386
2387 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2388 CM_MSG_RESPONSE_OTHER,
2389 cm_id_priv->service_timeout,
2390 cm_id_priv->private_data,
2391 cm_id_priv->private_data_len);
2392 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2393
2394 if (ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2395 &msg->send_wr, &bad_send_wr))
2396 cm_free_msg(msg);
2397 goto deref;
2398 default:
2399 goto unlock;
2400 }
2401
2402 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2403 cm_id_priv->tid = lap_msg->hdr.tid;
2404 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2405 if (!ret)
2406 list_add_tail(&work->list, &cm_id_priv->work_list);
2407 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2408
2409 if (ret)
2410 cm_process_work(cm_id_priv, work);
2411 else
2412 cm_deref_id(cm_id_priv);
2413 return 0;
2414
2415unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2416deref: cm_deref_id(cm_id_priv);
2417 return -EINVAL;
2418}
2419
2420static void cm_format_apr(struct cm_apr_msg *apr_msg,
2421 struct cm_id_private *cm_id_priv,
2422 enum ib_cm_apr_status status,
2423 void *info,
2424 u8 info_length,
2425 const void *private_data,
2426 u8 private_data_len)
2427{
2428 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2429 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2430 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2431 apr_msg->ap_status = (u8) status;
2432
2433 if (info && info_length) {
2434 apr_msg->info_length = info_length;
2435 memcpy(apr_msg->info, info, info_length);
2436 }
2437
2438 if (private_data && private_data_len)
2439 memcpy(apr_msg->private_data, private_data, private_data_len);
2440}
2441
2442int ib_send_cm_apr(struct ib_cm_id *cm_id,
2443 enum ib_cm_apr_status status,
2444 void *info,
2445 u8 info_length,
2446 const void *private_data,
2447 u8 private_data_len)
2448{
2449 struct cm_id_private *cm_id_priv;
2450 struct ib_mad_send_buf *msg;
2451 struct ib_send_wr *bad_send_wr;
2452 unsigned long flags;
2453 int ret;
2454
2455 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2456 (info && info_length > IB_CM_APR_INFO_LENGTH))
2457 return -EINVAL;
2458
2459 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2460 spin_lock_irqsave(&cm_id_priv->lock, flags);
2461 if (cm_id->state != IB_CM_ESTABLISHED ||
2462 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2463 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2464 ret = -EINVAL;
2465 goto out;
2466 }
2467
2468 ret = cm_alloc_msg(cm_id_priv, &msg);
2469 if (ret)
2470 goto out;
2471
2472 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2473 info, info_length, private_data, private_data_len);
2474 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2475 &msg->send_wr, &bad_send_wr);
2476 if (ret) {
2477 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2478 cm_free_msg(msg);
2479 return ret;
2480 }
2481
2482 cm_id->lap_state = IB_CM_LAP_IDLE;
2483out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2484 return ret;
2485}
2486EXPORT_SYMBOL(ib_send_cm_apr);
2487
2488static int cm_apr_handler(struct cm_work *work)
2489{
2490 struct cm_id_private *cm_id_priv;
2491 struct cm_apr_msg *apr_msg;
2492 unsigned long flags;
2493 int ret;
2494
2495 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2496 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2497 apr_msg->local_comm_id);
2498 if (!cm_id_priv)
2499 return -EINVAL; /* Unmatched reply. */
2500
2501 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2502 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2503 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2504 work->cm_event.private_data = &apr_msg->private_data;
2505
2506 spin_lock_irqsave(&cm_id_priv->lock, flags);
2507 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2508 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2509 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2510 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2511 goto out;
2512 }
2513 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
2514 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2515 (unsigned long) cm_id_priv->msg);
2516 cm_id_priv->msg = NULL;
2517
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 int cm_timewait_handler(struct cm_work *work)
2534{
2535 struct cm_timewait_info *timewait_info;
2536 struct cm_id_private *cm_id_priv;
2537 unsigned long flags;
2538 int ret;
2539
2540 timewait_info = (struct cm_timewait_info *)work;
2541 cm_cleanup_timewait(timewait_info);
2542
2543 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2544 timewait_info->work.remote_id);
2545 if (!cm_id_priv)
2546 return -EINVAL;
2547
2548 spin_lock_irqsave(&cm_id_priv->lock, flags);
2549 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2550 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2551 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2552 goto out;
2553 }
2554 cm_id_priv->id.state = IB_CM_IDLE;
2555 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2556 if (!ret)
2557 list_add_tail(&work->list, &cm_id_priv->work_list);
2558 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2559
2560 if (ret)
2561 cm_process_work(cm_id_priv, work);
2562 else
2563 cm_deref_id(cm_id_priv);
2564 return 0;
2565out:
2566 cm_deref_id(cm_id_priv);
2567 return -EINVAL;
2568}
2569
2570static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2571 struct cm_id_private *cm_id_priv,
2572 struct ib_cm_sidr_req_param *param)
2573{
2574 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2575 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2576 sidr_req_msg->request_id = cm_id_priv->id.local_id;
97f52eb4 2577 sidr_req_msg->pkey = cpu_to_be16(param->pkey);
a977049d
HR		 2578 sidr_req_msg->service_id = param->service_id;
2579
2580 if (param->private_data && param->private_data_len)
2581 memcpy(sidr_req_msg->private_data, param->private_data,
2582 param->private_data_len);
2583}
2584
2585int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2586 struct ib_cm_sidr_req_param *param)
2587{
2588 struct cm_id_private *cm_id_priv;
2589 struct ib_mad_send_buf *msg;
2590 struct ib_send_wr *bad_send_wr;
2591 unsigned long flags;
2592 int ret;
2593
2594 if (!param->path || (param->private_data &&
2595 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2596 return -EINVAL;
2597
2598 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2599 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2600 if (ret)
2601 goto out;
2602
2603 cm_id->service_id = param->service_id;
97f52eb4 2604 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2605 cm_id_priv->timeout_ms = param->timeout_ms;
2606 cm_id_priv->max_cm_retries = param->max_cm_retries;
2607 ret = cm_alloc_msg(cm_id_priv, &msg);
2608 if (ret)
2609 goto out;
2610
2611 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2612 param);
2613 msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms;
2614 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2615
2616 spin_lock_irqsave(&cm_id_priv->lock, flags);
2617 if (cm_id->state == IB_CM_IDLE)
2618 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2619 &msg->send_wr, &bad_send_wr);
2620 else
2621 ret = -EINVAL;
2622
2623 if (ret) {
2624 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2625 cm_free_msg(msg);
2626 goto out;
2627 }
2628 cm_id->state = IB_CM_SIDR_REQ_SENT;
2629 cm_id_priv->msg = msg;
2630 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2631out:
2632 return ret;
2633}
2634EXPORT_SYMBOL(ib_send_cm_sidr_req);
2635
2636static void cm_format_sidr_req_event(struct cm_work *work,
2637 struct ib_cm_id *listen_id)
2638{
2639 struct cm_sidr_req_msg *sidr_req_msg;
2640 struct ib_cm_sidr_req_event_param *param;
2641
2642 sidr_req_msg = (struct cm_sidr_req_msg *)
2643 work->mad_recv_wc->recv_buf.mad;
2644 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 2645 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 2646 param->listen_id = listen_id;
a977049d
HR		 2647 param->port = work->port->port_num;
2648 work->cm_event.private_data = &sidr_req_msg->private_data;
2649}
2650
2651static int cm_sidr_req_handler(struct cm_work *work)
2652{
2653 struct ib_cm_id *cm_id;
2654 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2655 struct cm_sidr_req_msg *sidr_req_msg;
2656 struct ib_wc *wc;
2657 unsigned long flags;
2658
07d357d0 2659 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 2660 if (IS_ERR(cm_id))
2661 return PTR_ERR(cm_id);
2662 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2663
2664 /* Record SGID/SLID and request ID for lookup. */
2665 sidr_req_msg = (struct cm_sidr_req_msg *)
2666 work->mad_recv_wc->recv_buf.mad;
2667 wc = work->mad_recv_wc->wc;
97f52eb4 2668 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 2669 cm_id_priv->av.dgid.global.interface_id = 0;
2670 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2671 &cm_id_priv->av);
2672 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2673 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2674 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2675 atomic_inc(&cm_id_priv->work_count);
2676
2677 spin_lock_irqsave(&cm.lock, flags);
2678 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2679 if (cur_cm_id_priv) {
2680 spin_unlock_irqrestore(&cm.lock, flags);
2681 goto out; /* Duplicate message. */
2682 }
07d357d0
SH		 2683 cur_cm_id_priv = cm_find_listen(cm_id->device,
2684 sidr_req_msg->service_id);
a977049d
HR		 2685 if (!cur_cm_id_priv) {
2686 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2687 spin_unlock_irqrestore(&cm.lock, flags);
2688 /* todo: reply with no match */
2689 goto out; /* No match. */
2690 }
2691 atomic_inc(&cur_cm_id_priv->refcount);
2692 spin_unlock_irqrestore(&cm.lock, flags);
2693
2694 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2695 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2696 cm_id_priv->id.service_id = sidr_req_msg->service_id;
97f52eb4 2697 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2698
2699 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2700 cm_process_work(cm_id_priv, work);
2701 cm_deref_id(cur_cm_id_priv);
2702 return 0;
2703out:
2704 ib_destroy_cm_id(&cm_id_priv->id);
2705 return -EINVAL;
2706}
2707
2708static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2709 struct cm_id_private *cm_id_priv,
2710 struct ib_cm_sidr_rep_param *param)
2711{
2712 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2713 cm_id_priv->tid);
2714 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2715 sidr_rep_msg->status = param->status;
2716 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2717 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2718 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2719
2720 if (param->info && param->info_length)
2721 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2722
2723 if (param->private_data && param->private_data_len)
2724 memcpy(sidr_rep_msg->private_data, param->private_data,
2725 param->private_data_len);
2726}
2727
2728int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2729 struct ib_cm_sidr_rep_param *param)
2730{
2731 struct cm_id_private *cm_id_priv;
2732 struct ib_mad_send_buf *msg;
2733 struct ib_send_wr *bad_send_wr;
2734 unsigned long flags;
2735 int ret;
2736
2737 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2738 (param->private_data &&
2739 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2740 return -EINVAL;
2741
2742 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2743 spin_lock_irqsave(&cm_id_priv->lock, flags);
2744 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2745 ret = -EINVAL;
2746 goto error;
2747 }
2748
2749 ret = cm_alloc_msg(cm_id_priv, &msg);
2750 if (ret)
2751 goto error;
2752
2753 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2754 param);
2755 ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent,
2756 &msg->send_wr, &bad_send_wr);
2757 if (ret) {
2758 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2759 cm_free_msg(msg);
2760 return ret;
2761 }
2762 cm_id->state = IB_CM_IDLE;
2763 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2764
2765 spin_lock_irqsave(&cm.lock, flags);
2766 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2767 spin_unlock_irqrestore(&cm.lock, flags);
2768 return 0;
2769
2770error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2771 return ret;
2772}
2773EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2774
2775static void cm_format_sidr_rep_event(struct cm_work *work)
2776{
2777 struct cm_sidr_rep_msg *sidr_rep_msg;
2778 struct ib_cm_sidr_rep_event_param *param;
2779
2780 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2781 work->mad_recv_wc->recv_buf.mad;
2782 param = &work->cm_event.param.sidr_rep_rcvd;
2783 param->status = sidr_rep_msg->status;
2784 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2785 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2786 param->info = &sidr_rep_msg->info;
2787 param->info_len = sidr_rep_msg->info_length;
2788 work->cm_event.private_data = &sidr_rep_msg->private_data;
2789}
2790
2791static int cm_sidr_rep_handler(struct cm_work *work)
2792{
2793 struct cm_sidr_rep_msg *sidr_rep_msg;
2794 struct cm_id_private *cm_id_priv;
2795 unsigned long flags;
2796
2797 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2798 work->mad_recv_wc->recv_buf.mad;
2799 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2800 if (!cm_id_priv)
2801 return -EINVAL; /* Unmatched reply. */
2802
2803 spin_lock_irqsave(&cm_id_priv->lock, flags);
2804 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2805 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2806 goto out;
2807 }
2808 cm_id_priv->id.state = IB_CM_IDLE;
2809 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2810 (unsigned long) cm_id_priv->msg);
2811 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2812
2813 cm_format_sidr_rep_event(work);
2814 cm_process_work(cm_id_priv, work);
2815 return 0;
2816out:
2817 cm_deref_id(cm_id_priv);
2818 return -EINVAL;
2819}
2820
2821static void cm_process_send_error(struct ib_mad_send_buf *msg,
2822 enum ib_wc_status wc_status)
2823{
2824 struct cm_id_private *cm_id_priv;
2825 struct ib_cm_event cm_event;
2826 enum ib_cm_state state;
2827 unsigned long flags;
2828 int ret;
2829
2830 memset(&cm_event, 0, sizeof cm_event);
2831 cm_id_priv = msg->context[0];
2832
2833 /* Discard old sends or ones without a response. */
2834 spin_lock_irqsave(&cm_id_priv->lock, flags);
2835 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2836 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2837 goto discard;
2838
2839 switch (state) {
2840 case IB_CM_REQ_SENT:
2841 case IB_CM_MRA_REQ_RCVD:
2842 cm_reset_to_idle(cm_id_priv);
2843 cm_event.event = IB_CM_REQ_ERROR;
2844 break;
2845 case IB_CM_REP_SENT:
2846 case IB_CM_MRA_REP_RCVD:
2847 cm_reset_to_idle(cm_id_priv);
2848 cm_event.event = IB_CM_REP_ERROR;
2849 break;
2850 case IB_CM_DREQ_SENT:
2851 cm_enter_timewait(cm_id_priv);
2852 cm_event.event = IB_CM_DREQ_ERROR;
2853 break;
2854 case IB_CM_SIDR_REQ_SENT:
2855 cm_id_priv->id.state = IB_CM_IDLE;
2856 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2857 break;
2858 default:
2859 goto discard;
2860 }
2861 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2862 cm_event.param.send_status = wc_status;
2863
2864 /* No other events can occur on the cm_id at this point. */
2865 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2866 cm_free_msg(msg);
2867 if (ret)
2868 ib_destroy_cm_id(&cm_id_priv->id);
2869 return;
2870discard:
2871 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2872 cm_free_msg(msg);
2873}
2874
2875static void cm_send_handler(struct ib_mad_agent *mad_agent,
2876 struct ib_mad_send_wc *mad_send_wc)
2877{
2878 struct ib_mad_send_buf *msg;
2879
2880 msg = (struct ib_mad_send_buf *)(unsigned long)mad_send_wc->wr_id;
2881
2882 switch (mad_send_wc->status) {
2883 case IB_WC_SUCCESS:
2884 case IB_WC_WR_FLUSH_ERR:
2885 cm_free_msg(msg);
2886 break;
2887 default:
2888 if (msg->context[0] && msg->context[1])
2889 cm_process_send_error(msg, mad_send_wc->status);
2890 else
2891 cm_free_msg(msg);
2892 break;
2893 }
2894}
2895
2896static void cm_work_handler(void *data)
2897{
2898 struct cm_work *work = data;
2899 int ret;
2900
2901 switch (work->cm_event.event) {
2902 case IB_CM_REQ_RECEIVED:
2903 ret = cm_req_handler(work);
2904 break;
2905 case IB_CM_MRA_RECEIVED:
2906 ret = cm_mra_handler(work);
2907 break;
2908 case IB_CM_REJ_RECEIVED:
2909 ret = cm_rej_handler(work);
2910 break;
2911 case IB_CM_REP_RECEIVED:
2912 ret = cm_rep_handler(work);
2913 break;
2914 case IB_CM_RTU_RECEIVED:
2915 ret = cm_rtu_handler(work);
2916 break;
2917 case IB_CM_USER_ESTABLISHED:
2918 ret = cm_establish_handler(work);
2919 break;
2920 case IB_CM_DREQ_RECEIVED:
2921 ret = cm_dreq_handler(work);
2922 break;
2923 case IB_CM_DREP_RECEIVED:
2924 ret = cm_drep_handler(work);
2925 break;
2926 case IB_CM_SIDR_REQ_RECEIVED:
2927 ret = cm_sidr_req_handler(work);
2928 break;
2929 case IB_CM_SIDR_REP_RECEIVED:
2930 ret = cm_sidr_rep_handler(work);
2931 break;
2932 case IB_CM_LAP_RECEIVED:
2933 ret = cm_lap_handler(work);
2934 break;
2935 case IB_CM_APR_RECEIVED:
2936 ret = cm_apr_handler(work);
2937 break;
2938 case IB_CM_TIMEWAIT_EXIT:
2939 ret = cm_timewait_handler(work);
2940 break;
2941 default:
2942 ret = -EINVAL;
2943 break;
2944 }
2945 if (ret)
2946 cm_free_work(work);
2947}
2948
2949int ib_cm_establish(struct ib_cm_id *cm_id)
2950{
2951 struct cm_id_private *cm_id_priv;
2952 struct cm_work *work;
2953 unsigned long flags;
2954 int ret = 0;
2955
2956 work = kmalloc(sizeof *work, GFP_ATOMIC);
2957 if (!work)
2958 return -ENOMEM;
2959
2960 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2961 spin_lock_irqsave(&cm_id_priv->lock, flags);
2962 switch (cm_id->state)
2963 {
2964 case IB_CM_REP_SENT:
2965 case IB_CM_MRA_REP_RCVD:
2966 cm_id->state = IB_CM_ESTABLISHED;
2967 break;
2968 case IB_CM_ESTABLISHED:
2969 ret = -EISCONN;
2970 break;
2971 default:
2972 ret = -EINVAL;
2973 break;
2974 }
2975 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2976
2977 if (ret) {
2978 kfree(work);
2979 goto out;
2980 }
2981
2982 /*
2983 * The CM worker thread may try to destroy the cm_id before it
2984 * can execute this work item. To prevent potential deadlock,
2985 * we need to find the cm_id once we're in the context of the
2986 * worker thread, rather than holding a reference on it.
2987 */
2988 INIT_WORK(&work->work, cm_work_handler, work);
2989 work->local_id = cm_id->local_id;
2990 work->remote_id = cm_id->remote_id;
2991 work->mad_recv_wc = NULL;
2992 work->cm_event.event = IB_CM_USER_ESTABLISHED;
2993 queue_work(cm.wq, &work->work);
2994out:
2995 return ret;
2996}
2997EXPORT_SYMBOL(ib_cm_establish);
2998
2999static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3000 struct ib_mad_recv_wc *mad_recv_wc)
3001{
3002 struct cm_work *work;
3003 enum ib_cm_event_type event;
3004 int paths = 0;
3005
3006 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3007 case CM_REQ_ATTR_ID:
3008 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3009 alt_local_lid != 0);
3010 event = IB_CM_REQ_RECEIVED;
3011 break;
3012 case CM_MRA_ATTR_ID:
3013 event = IB_CM_MRA_RECEIVED;
3014 break;
3015 case CM_REJ_ATTR_ID:
3016 event = IB_CM_REJ_RECEIVED;
3017 break;
3018 case CM_REP_ATTR_ID:
3019 event = IB_CM_REP_RECEIVED;
3020 break;
3021 case CM_RTU_ATTR_ID:
3022 event = IB_CM_RTU_RECEIVED;
3023 break;
3024 case CM_DREQ_ATTR_ID:
3025 event = IB_CM_DREQ_RECEIVED;
3026 break;
3027 case CM_DREP_ATTR_ID:
3028 event = IB_CM_DREP_RECEIVED;
3029 break;
3030 case CM_SIDR_REQ_ATTR_ID:
3031 event = IB_CM_SIDR_REQ_RECEIVED;
3032 break;
3033 case CM_SIDR_REP_ATTR_ID:
3034 event = IB_CM_SIDR_REP_RECEIVED;
3035 break;
3036 case CM_LAP_ATTR_ID:
3037 paths = 1;
3038 event = IB_CM_LAP_RECEIVED;
3039 break;
3040 case CM_APR_ATTR_ID:
3041 event = IB_CM_APR_RECEIVED;
3042 break;
3043 default:
3044 ib_free_recv_mad(mad_recv_wc);
3045 return;
3046 }
3047
3048 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3049 GFP_KERNEL);
3050 if (!work) {
3051 ib_free_recv_mad(mad_recv_wc);
3052 return;
3053 }
3054
3055 INIT_WORK(&work->work, cm_work_handler, work);
3056 work->cm_event.event = event;
3057 work->mad_recv_wc = mad_recv_wc;
3058 work->port = (struct cm_port *)mad_agent->context;
3059 queue_work(cm.wq, &work->work);
3060}
3061
3062static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3063 struct ib_qp_attr *qp_attr,
3064 int *qp_attr_mask)
3065{
3066 unsigned long flags;
3067 int ret;
3068
3069 spin_lock_irqsave(&cm_id_priv->lock, flags);
3070 switch (cm_id_priv->id.state) {
3071 case IB_CM_REQ_SENT:
3072 case IB_CM_MRA_REQ_RCVD:
3073 case IB_CM_REQ_RCVD:
3074 case IB_CM_MRA_REQ_SENT:
3075 case IB_CM_REP_RCVD:
3076 case IB_CM_MRA_REP_SENT:
3077 case IB_CM_REP_SENT:
3078 case IB_CM_MRA_REP_RCVD:
3079 case IB_CM_ESTABLISHED:
3080 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3081 IB_QP_PKEY_INDEX | IB_QP_PORT;
3082 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE;
3083 if (cm_id_priv->responder_resources)
3084 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_WRITE |
3085 IB_ACCESS_REMOTE_READ;
3086 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3087 qp_attr->port_num = cm_id_priv->av.port->port_num;
3088 ret = 0;
3089 break;
3090 default:
3091 ret = -EINVAL;
3092 break;
3093 }
3094 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3095 return ret;
3096}
3097
3098static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3099 struct ib_qp_attr *qp_attr,
3100 int *qp_attr_mask)
3101{
3102 unsigned long flags;
3103 int ret;
3104
3105 spin_lock_irqsave(&cm_id_priv->lock, flags);
3106 switch (cm_id_priv->id.state) {
3107 case IB_CM_REQ_RCVD:
3108 case IB_CM_MRA_REQ_SENT:
3109 case IB_CM_REP_RCVD:
3110 case IB_CM_MRA_REP_SENT:
3111 case IB_CM_REP_SENT:
3112 case IB_CM_MRA_REP_RCVD:
3113 case IB_CM_ESTABLISHED:
3114 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
3115 IB_QP_DEST_QPN | IB_QP_RQ_PSN |
3116 IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER;
3117 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3118 qp_attr->path_mtu = cm_id_priv->path_mtu;
3119 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3120 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
3121 qp_attr->max_dest_rd_atomic = cm_id_priv->responder_resources;
3122 qp_attr->min_rnr_timer = 0;
3123 if (cm_id_priv->alt_av.ah_attr.dlid) {
3124 *qp_attr_mask |= IB_QP_ALT_PATH;
3125 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3126 }
3127 ret = 0;
3128 break;
3129 default:
3130 ret = -EINVAL;
3131 break;
3132 }
3133 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3134 return ret;
3135}
3136
3137static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3138 struct ib_qp_attr *qp_attr,
3139 int *qp_attr_mask)
3140{
3141 unsigned long flags;
3142 int ret;
3143
3144 spin_lock_irqsave(&cm_id_priv->lock, flags);
3145 switch (cm_id_priv->id.state) {
3146 case IB_CM_REP_RCVD:
3147 case IB_CM_MRA_REP_SENT:
3148 case IB_CM_REP_SENT:
3149 case IB_CM_MRA_REP_RCVD:
3150 case IB_CM_ESTABLISHED:
3151 *qp_attr_mask = IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3152 IB_QP_RNR_RETRY | IB_QP_SQ_PSN |
3153 IB_QP_MAX_QP_RD_ATOMIC;
3154 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3155 qp_attr->retry_cnt = cm_id_priv->retry_count;
3156 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3157 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
3158 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3159 if (cm_id_priv->alt_av.ah_attr.dlid) {
3160 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3161 qp_attr->path_mig_state = IB_MIG_REARM;
3162 }
3163 ret = 0;
3164 break;
3165 default:
3166 ret = -EINVAL;
3167 break;
3168 }
3169 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3170 return ret;
3171}
3172
3173int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3174 struct ib_qp_attr *qp_attr,
3175 int *qp_attr_mask)
3176{
3177 struct cm_id_private *cm_id_priv;
3178 int ret;
3179
3180 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3181 switch (qp_attr->qp_state) {
3182 case IB_QPS_INIT:
3183 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3184 break;
3185 case IB_QPS_RTR:
3186 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3187 break;
3188 case IB_QPS_RTS:
3189 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3190 break;
3191 default:
3192 ret = -EINVAL;
3193 break;
3194 }
3195 return ret;
3196}
3197EXPORT_SYMBOL(ib_cm_init_qp_attr);
3198
97f52eb4 3199static __be64 cm_get_ca_guid(struct ib_device *device)
a977049d
HR		 3200{
3201 struct ib_device_attr *device_attr;
97f52eb4 3202 __be64 guid;
a977049d
HR		 3203 int ret;
3204
3205 device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
3206 if (!device_attr)
3207 return 0;
3208
3209 ret = ib_query_device(device, device_attr);
3210 guid = ret ? 0 : device_attr->node_guid;
3211 kfree(device_attr);
3212 return guid;
3213}
3214
3215static void cm_add_one(struct ib_device *device)
3216{
3217 struct cm_device *cm_dev;
3218 struct cm_port *port;
3219 struct ib_mad_reg_req reg_req = {
3220 .mgmt_class = IB_MGMT_CLASS_CM,
3221 .mgmt_class_version = IB_CM_CLASS_VERSION
3222 };
3223 struct ib_port_modify port_modify = {
3224 .set_port_cap_mask = IB_PORT_CM_SUP
3225 };
3226 unsigned long flags;
3227 int ret;
3228 u8 i;
3229
3230 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3231 device->phys_port_cnt, GFP_KERNEL);
3232 if (!cm_dev)
3233 return;
3234
3235 cm_dev->device = device;
3236 cm_dev->ca_guid = cm_get_ca_guid(device);
3237 if (!cm_dev->ca_guid)
3238 goto error1;
3239
3240 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3241 for (i = 1; i <= device->phys_port_cnt; i++) {
3242 port = &cm_dev->port[i-1];
3243 port->cm_dev = cm_dev;
3244 port->port_num = i;
3245 port->mad_agent = ib_register_mad_agent(device, i,
3246 IB_QPT_GSI,
3247 &reg_req,
3248 0,
3249 cm_send_handler,
3250 cm_recv_handler,
3251 port);
3252 if (IS_ERR(port->mad_agent))
3253 goto error2;
3254
3255 ret = ib_modify_port(device, i, 0, &port_modify);
3256 if (ret)
3257 goto error3;
3258 }
3259 ib_set_client_data(device, &cm_client, cm_dev);
3260
3261 write_lock_irqsave(&cm.device_lock, flags);
3262 list_add_tail(&cm_dev->list, &cm.device_list);
3263 write_unlock_irqrestore(&cm.device_lock, flags);
3264 return;
3265
3266error3:
3267 ib_unregister_mad_agent(port->mad_agent);
3268error2:
3269 port_modify.set_port_cap_mask = 0;
3270 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3271 while (--i) {
3272 port = &cm_dev->port[i-1];
3273 ib_modify_port(device, port->port_num, 0, &port_modify);
3274 ib_unregister_mad_agent(port->mad_agent);
3275 }
3276error1:
3277 kfree(cm_dev);
3278}
3279
3280static void cm_remove_one(struct ib_device *device)
3281{
3282 struct cm_device *cm_dev;
3283 struct cm_port *port;
3284 struct ib_port_modify port_modify = {
3285 .clr_port_cap_mask = IB_PORT_CM_SUP
3286 };
3287 unsigned long flags;
3288 int i;
3289
3290 cm_dev = ib_get_client_data(device, &cm_client);
3291 if (!cm_dev)
3292 return;
3293
3294 write_lock_irqsave(&cm.device_lock, flags);
3295 list_del(&cm_dev->list);
3296 write_unlock_irqrestore(&cm.device_lock, flags);
3297
3298 for (i = 1; i <= device->phys_port_cnt; i++) {
3299 port = &cm_dev->port[i-1];
3300 ib_modify_port(device, port->port_num, 0, &port_modify);
3301 ib_unregister_mad_agent(port->mad_agent);
3302 }
3303 kfree(cm_dev);
3304}
3305
3306static int __init ib_cm_init(void)
3307{
3308 int ret;
3309
3310 memset(&cm, 0, sizeof cm);
3311 INIT_LIST_HEAD(&cm.device_list);
3312 rwlock_init(&cm.device_lock);
3313 spin_lock_init(&cm.lock);
3314 cm.listen_service_table = RB_ROOT;
3315 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3316 cm.remote_id_table = RB_ROOT;
3317 cm.remote_qp_table = RB_ROOT;
3318 cm.remote_sidr_table = RB_ROOT;
3319 idr_init(&cm.local_id_table);
3320 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3321
3322 cm.wq = create_workqueue("ib_cm");
3323 if (!cm.wq)
3324 return -ENOMEM;
3325
3326 ret = ib_register_client(&cm_client);
3327 if (ret)
3328 goto error;
3329
3330 return 0;
3331error:
3332 destroy_workqueue(cm.wq);
3333 return ret;
3334}
3335
3336static void __exit ib_cm_cleanup(void)
3337{
3338 flush_workqueue(cm.wq);
3339 destroy_workqueue(cm.wq);
3340 ib_unregister_client(&cm_client);
5d7edb3c 3341 idr_destroy(&cm.local_id_table);
a977049d
HR		 3342}
3343
3344module_init(ib_cm_init);
3345module_exit(ib_cm_cleanup);
3346
Linux kernel - Deliverables
This page took 0.179378 seconds and 5 git commands to generate.