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IB/sa: Make sure SA queries use default P_Key
[deliverable/linux.git] / drivers / infiniband / core / cm.c
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a977049d 1/*
f06d2653 2 * Copyright (c) 2004-2006 Intel Corporation. All rights reserved.
a977049d
HR		 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 *
6e61d04f 35 * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $
a977049d 36 */
1b52fa98
SH		 37
38#include <linux/completion.h>
a977049d
HR		 39#include <linux/dma-mapping.h>
40#include <linux/err.h>
41#include <linux/idr.h>
42#include <linux/interrupt.h>
f06d2653 43#include <linux/random.h>
a977049d
HR		 44#include <linux/rbtree.h>
45#include <linux/spinlock.h>
46#include <linux/workqueue.h>
47
a4d61e84
RD		 48#include <rdma/ib_cache.h>
49#include <rdma/ib_cm.h>
a977049d
HR		 50#include "cm_msgs.h"
51
52MODULE_AUTHOR("Sean Hefty");
53MODULE_DESCRIPTION("InfiniBand CM");
54MODULE_LICENSE("Dual BSD/GPL");
55
56static void cm_add_one(struct ib_device *device);
57static void cm_remove_one(struct ib_device *device);
58
59static struct ib_client cm_client = {
60 .name = "cm",
61 .add = cm_add_one,
62 .remove = cm_remove_one
63};
64
65static struct ib_cm {
66 spinlock_t lock;
67 struct list_head device_list;
68 rwlock_t device_lock;
69 struct rb_root listen_service_table;
70 u64 listen_service_id;
71 /* struct rb_root peer_service_table; todo: fix peer to peer */
72 struct rb_root remote_qp_table;
73 struct rb_root remote_id_table;
74 struct rb_root remote_sidr_table;
75 struct idr local_id_table;
f06d2653 76 __be32 random_id_operand;
8575329d 77 struct list_head timewait_list;
a977049d
HR		 78 struct workqueue_struct *wq;
79} cm;
80
81struct cm_port {
82 struct cm_device *cm_dev;
83 struct ib_mad_agent *mad_agent;
84 u8 port_num;
85};
86
87struct cm_device {
88 struct list_head list;
89 struct ib_device *device;
a977049d
HR		 90 struct cm_port port[0];
91};
92
93struct cm_av {
94 struct cm_port *port;
95 union ib_gid dgid;
96 struct ib_ah_attr ah_attr;
97 u16 pkey_index;
98 u8 packet_life_time;
99};
100
101struct cm_work {
c4028958 102 struct delayed_work work;
a977049d
HR		 103 struct list_head list;
104 struct cm_port *port;
105 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
97f52eb4
SH		 106 __be32 local_id; /* Established / timewait */
107 __be32 remote_id;
a977049d
HR		 108 struct ib_cm_event cm_event;
109 struct ib_sa_path_rec path[0];
110};
111
112struct cm_timewait_info {
113 struct cm_work work; /* Must be first. */
8575329d 114 struct list_head list;
a977049d
HR		 115 struct rb_node remote_qp_node;
116 struct rb_node remote_id_node;
97f52eb4
SH		 117 __be64 remote_ca_guid;
118 __be32 remote_qpn;
a977049d
HR		 119 u8 inserted_remote_qp;
120 u8 inserted_remote_id;
121};
122
123struct cm_id_private {
124 struct ib_cm_id id;
125
126 struct rb_node service_node;
127 struct rb_node sidr_id_node;
87fd1a11 128 spinlock_t lock; /* Do not acquire inside cm.lock */
1b52fa98 129 struct completion comp;
a977049d
HR		 130 atomic_t refcount;
131
132 struct ib_mad_send_buf *msg;
133 struct cm_timewait_info *timewait_info;
134 /* todo: use alternate port on send failure */
135 struct cm_av av;
136 struct cm_av alt_av;
6e61d04f 137 struct ib_cm_compare_data *compare_data;
a977049d
HR		 138
139 void *private_data;
97f52eb4
SH		 140 __be64 tid;
141 __be32 local_qpn;
142 __be32 remote_qpn;
ae7971a7 143 enum ib_qp_type qp_type;
97f52eb4
SH		 144 __be32 sq_psn;
145 __be32 rq_psn;
a977049d
HR		 146 int timeout_ms;
147 enum ib_mtu path_mtu;
e1444b5a 148 __be16 pkey;
a977049d
HR		 149 u8 private_data_len;
150 u8 max_cm_retries;
151 u8 peer_to_peer;
152 u8 responder_resources;
153 u8 initiator_depth;
a977049d
HR		 154 u8 retry_count;
155 u8 rnr_retry_count;
156 u8 service_timeout;
157
158 struct list_head work_list;
159 atomic_t work_count;
160};
161
c4028958 162static void cm_work_handler(struct work_struct *work);
a977049d
HR		 163
164static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
165{
166 if (atomic_dec_and_test(&cm_id_priv->refcount))
1b52fa98 167 complete(&cm_id_priv->comp);
a977049d
HR		 168}
169
170static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
171 struct ib_mad_send_buf **msg)
172{
173 struct ib_mad_agent *mad_agent;
174 struct ib_mad_send_buf *m;
175 struct ib_ah *ah;
176
177 mad_agent = cm_id_priv->av.port->mad_agent;
178 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
179 if (IS_ERR(ah))
180 return PTR_ERR(ah);
181
3cd96564 182 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
354ba39c 183 cm_id_priv->av.pkey_index,
34816ad9 184 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 185 GFP_ATOMIC);
186 if (IS_ERR(m)) {
187 ib_destroy_ah(ah);
188 return PTR_ERR(m);
189 }
190
191 /* Timeout set by caller if response is expected. */
34816ad9
SH		 192 m->ah = ah;
193 m->retries = cm_id_priv->max_cm_retries;
a977049d
HR		 194
195 atomic_inc(&cm_id_priv->refcount);
196 m->context[0] = cm_id_priv;
197 *msg = m;
198 return 0;
199}
200
201static int cm_alloc_response_msg(struct cm_port *port,
202 struct ib_mad_recv_wc *mad_recv_wc,
203 struct ib_mad_send_buf **msg)
204{
205 struct ib_mad_send_buf *m;
206 struct ib_ah *ah;
207
208 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
209 mad_recv_wc->recv_buf.grh, port->port_num);
210 if (IS_ERR(ah))
211 return PTR_ERR(ah);
212
213 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
34816ad9 214 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 215 GFP_ATOMIC);
216 if (IS_ERR(m)) {
217 ib_destroy_ah(ah);
218 return PTR_ERR(m);
219 }
34816ad9 220 m->ah = ah;
a977049d
HR		 221 *msg = m;
222 return 0;
223}
224
225static void cm_free_msg(struct ib_mad_send_buf *msg)
226{
34816ad9 227 ib_destroy_ah(msg->ah);
a977049d
HR		 228 if (msg->context[0])
229 cm_deref_id(msg->context[0]);
230 ib_free_send_mad(msg);
231}
232
233static void * cm_copy_private_data(const void *private_data,
234 u8 private_data_len)
235{
236 void *data;
237
238 if (!private_data || !private_data_len)
239 return NULL;
240
bed8bdfd 241 data = kmemdup(private_data, private_data_len, GFP_KERNEL);
a977049d
HR		 242 if (!data)
243 return ERR_PTR(-ENOMEM);
244
a977049d
HR		 245 return data;
246}
247
248static void cm_set_private_data(struct cm_id_private *cm_id_priv,
249 void *private_data, u8 private_data_len)
250{
251 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
252 kfree(cm_id_priv->private_data);
253
254 cm_id_priv->private_data = private_data;
255 cm_id_priv->private_data_len = private_data_len;
256}
257
ca222c6b
SH		 258static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
259 struct ib_grh *grh, struct cm_av *av)
a977049d
HR		 260{
261 av->port = port;
262 av->pkey_index = wc->pkey_index;
ca222c6b
SH		 263 ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc,
264 grh, &av->ah_attr);
a977049d
HR		 265}
266
267static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
268{
269 struct cm_device *cm_dev;
270 struct cm_port *port = NULL;
271 unsigned long flags;
272 int ret;
273 u8 p;
274
275 read_lock_irqsave(&cm.device_lock, flags);
276 list_for_each_entry(cm_dev, &cm.device_list, list) {
277 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
278 &p, NULL)) {
279 port = &cm_dev->port[p-1];
280 break;
281 }
282 }
283 read_unlock_irqrestore(&cm.device_lock, flags);
284
285 if (!port)
286 return -EINVAL;
287
288 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
289 be16_to_cpu(path->pkey), &av->pkey_index);
290 if (ret)
291 return ret;
292
293 av->port = port;
ca222c6b
SH		 294 ib_init_ah_from_path(cm_dev->device, port->port_num, path,
295 &av->ah_attr);
a977049d
HR		 296 av->packet_life_time = path->packet_life_time;
297 return 0;
298}
299
300static int cm_alloc_id(struct cm_id_private *cm_id_priv)
301{
302 unsigned long flags;
f06d2653 303 int ret, id;
de1bb1a6 304 static int next_id;
a977049d
HR		 305
306 do {
307 spin_lock_irqsave(&cm.lock, flags);
f06d2653 308 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv,
9f81036c
MT		 309 next_id, &id);
310 if (!ret)
311 next_id = ((unsigned) id + 1) & MAX_ID_MASK;
a977049d
HR		 312 spin_unlock_irqrestore(&cm.lock, flags);
313 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
f06d2653
SH		 314
315 cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand);
a977049d
HR		 316 return ret;
317}
318
97f52eb4 319static void cm_free_id(__be32 local_id)
a977049d
HR		 320{
321 unsigned long flags;
322
323 spin_lock_irqsave(&cm.lock, flags);
f06d2653
SH		 324 idr_remove(&cm.local_id_table,
325 (__force int) (local_id ^ cm.random_id_operand));
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
f06d2653
SH		 333 cm_id_priv = idr_find(&cm.local_id_table,
334 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 335 if (cm_id_priv) {
336 if (cm_id_priv->id.remote_id == remote_id)
337 atomic_inc(&cm_id_priv->refcount);
338 else
339 cm_id_priv = NULL;
340 }
341
342 return cm_id_priv;
343}
344
97f52eb4 345static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 346{
347 struct cm_id_private *cm_id_priv;
348 unsigned long flags;
349
350 spin_lock_irqsave(&cm.lock, flags);
351 cm_id_priv = cm_get_id(local_id, remote_id);
352 spin_unlock_irqrestore(&cm.lock, flags);
353
354 return cm_id_priv;
355}
356
6e61d04f
SH		 357static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
358{
359 int i;
360
361 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
362 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
363 ((unsigned long *) mask)[i];
364}
365
366static int cm_compare_data(struct ib_cm_compare_data *src_data,
367 struct ib_cm_compare_data *dst_data)
368{
369 u8 src[IB_CM_COMPARE_SIZE];
370 u8 dst[IB_CM_COMPARE_SIZE];
371
372 if (!src_data || !dst_data)
373 return 0;
374
375 cm_mask_copy(src, src_data->data, dst_data->mask);
376 cm_mask_copy(dst, dst_data->data, src_data->mask);
377 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
378}
379
380static int cm_compare_private_data(u8 *private_data,
381 struct ib_cm_compare_data *dst_data)
382{
383 u8 src[IB_CM_COMPARE_SIZE];
384
385 if (!dst_data)
386 return 0;
387
388 cm_mask_copy(src, private_data, dst_data->mask);
389 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
390}
391
a977049d
HR		 392static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
393{
394 struct rb_node **link = &cm.listen_service_table.rb_node;
395 struct rb_node *parent = NULL;
396 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 397 __be64 service_id = cm_id_priv->id.service_id;
398 __be64 service_mask = cm_id_priv->id.service_mask;
6e61d04f 399 int data_cmp;
a977049d
HR		 400
401 while (*link) {
402 parent = *link;
403 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
404 service_node);
6e61d04f
SH		 405 data_cmp = cm_compare_data(cm_id_priv->compare_data,
406 cur_cm_id_priv->compare_data);
a977049d 407 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0 408 (service_mask & cur_cm_id_priv->id.service_id) &&
6e61d04f
SH		 409 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
410 !data_cmp)
07d357d0
SH		 411 return cur_cm_id_priv;
412
413 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
414 link = &(*link)->rb_left;
415 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
416 link = &(*link)->rb_right;
417 else if (service_id < cur_cm_id_priv->id.service_id)
a977049d 418 link = &(*link)->rb_left;
6e61d04f
SH		 419 else if (service_id > cur_cm_id_priv->id.service_id)
420 link = &(*link)->rb_right;
421 else if (data_cmp < 0)
422 link = &(*link)->rb_left;
a977049d
HR		 423 else
424 link = &(*link)->rb_right;
425 }
426 rb_link_node(&cm_id_priv->service_node, parent, link);
427 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
428 return NULL;
429}
430
07d357d0 431static struct cm_id_private * cm_find_listen(struct ib_device *device,
6e61d04f
SH		 432 __be64 service_id,
433 u8 *private_data)
a977049d
HR		 434{
435 struct rb_node *node = cm.listen_service_table.rb_node;
436 struct cm_id_private *cm_id_priv;
6e61d04f 437 int data_cmp;
a977049d
HR		 438
439 while (node) {
440 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
6e61d04f
SH		 441 data_cmp = cm_compare_private_data(private_data,
442 cm_id_priv->compare_data);
a977049d 443 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0 444 cm_id_priv->id.service_id &&
6e61d04f 445 (cm_id_priv->id.device == device) && !data_cmp)
a977049d 446 return cm_id_priv;
07d357d0
SH		 447
448 if (device < cm_id_priv->id.device)
449 node = node->rb_left;
450 else if (device > cm_id_priv->id.device)
451 node = node->rb_right;
452 else if (service_id < cm_id_priv->id.service_id)
a977049d 453 node = node->rb_left;
6e61d04f
SH		 454 else if (service_id > cm_id_priv->id.service_id)
455 node = node->rb_right;
456 else if (data_cmp < 0)
457 node = node->rb_left;
a977049d
HR		 458 else
459 node = node->rb_right;
460 }
461 return NULL;
462}
463
464static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
465 *timewait_info)
466{
467 struct rb_node **link = &cm.remote_id_table.rb_node;
468 struct rb_node *parent = NULL;
469 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 470 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
471 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 472
473 while (*link) {
474 parent = *link;
475 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
476 remote_id_node);
477 if (remote_id < cur_timewait_info->work.remote_id)
478 link = &(*link)->rb_left;
479 else if (remote_id > cur_timewait_info->work.remote_id)
480 link = &(*link)->rb_right;
481 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
482 link = &(*link)->rb_left;
483 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
484 link = &(*link)->rb_right;
485 else
486 return cur_timewait_info;
487 }
488 timewait_info->inserted_remote_id = 1;
489 rb_link_node(&timewait_info->remote_id_node, parent, link);
490 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
491 return NULL;
492}
493
97f52eb4
SH		 494static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
495 __be32 remote_id)
a977049d
HR		 496{
497 struct rb_node *node = cm.remote_id_table.rb_node;
498 struct cm_timewait_info *timewait_info;
499
500 while (node) {
501 timewait_info = rb_entry(node, struct cm_timewait_info,
502 remote_id_node);
503 if (remote_id < timewait_info->work.remote_id)
504 node = node->rb_left;
505 else if (remote_id > timewait_info->work.remote_id)
506 node = node->rb_right;
507 else if (remote_ca_guid < timewait_info->remote_ca_guid)
508 node = node->rb_left;
509 else if (remote_ca_guid > timewait_info->remote_ca_guid)
510 node = node->rb_right;
511 else
512 return timewait_info;
513 }
514 return NULL;
515}
516
517static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
518 *timewait_info)
519{
520 struct rb_node **link = &cm.remote_qp_table.rb_node;
521 struct rb_node *parent = NULL;
522 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 523 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
524 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 525
526 while (*link) {
527 parent = *link;
528 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
529 remote_qp_node);
530 if (remote_qpn < cur_timewait_info->remote_qpn)
531 link = &(*link)->rb_left;
532 else if (remote_qpn > cur_timewait_info->remote_qpn)
533 link = &(*link)->rb_right;
534 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
535 link = &(*link)->rb_left;
536 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
537 link = &(*link)->rb_right;
538 else
539 return cur_timewait_info;
540 }
541 timewait_info->inserted_remote_qp = 1;
542 rb_link_node(&timewait_info->remote_qp_node, parent, link);
543 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
544 return NULL;
545}
546
547static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
548 *cm_id_priv)
549{
550 struct rb_node **link = &cm.remote_sidr_table.rb_node;
551 struct rb_node *parent = NULL;
552 struct cm_id_private *cur_cm_id_priv;
553 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 554 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 555
556 while (*link) {
557 parent = *link;
558 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
559 sidr_id_node);
560 if (remote_id < cur_cm_id_priv->id.remote_id)
561 link = &(*link)->rb_left;
562 else if (remote_id > cur_cm_id_priv->id.remote_id)
563 link = &(*link)->rb_right;
564 else {
565 int cmp;
566 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
567 sizeof *port_gid);
568 if (cmp < 0)
569 link = &(*link)->rb_left;
570 else if (cmp > 0)
571 link = &(*link)->rb_right;
572 else
573 return cur_cm_id_priv;
574 }
575 }
576 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
577 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
578 return NULL;
579}
580
581static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
582 enum ib_cm_sidr_status status)
583{
584 struct ib_cm_sidr_rep_param param;
585
586 memset(&param, 0, sizeof param);
587 param.status = status;
588 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
589}
590
07d357d0
SH		 591struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
592 ib_cm_handler cm_handler,
a977049d
HR		 593 void *context)
594{
595 struct cm_id_private *cm_id_priv;
596 int ret;
597
de6eb66b 598 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
a977049d
HR		 599 if (!cm_id_priv)
600 return ERR_PTR(-ENOMEM);
601
a977049d 602 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 603 cm_id_priv->id.device = device;
a977049d
HR		 604 cm_id_priv->id.cm_handler = cm_handler;
605 cm_id_priv->id.context = context;
354ba39c 606 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 607 ret = cm_alloc_id(cm_id_priv);
608 if (ret)
609 goto error;
610
611 spin_lock_init(&cm_id_priv->lock);
1b52fa98 612 init_completion(&cm_id_priv->comp);
a977049d
HR		 613 INIT_LIST_HEAD(&cm_id_priv->work_list);
614 atomic_set(&cm_id_priv->work_count, -1);
615 atomic_set(&cm_id_priv->refcount, 1);
616 return &cm_id_priv->id;
617
618error:
619 kfree(cm_id_priv);
620 return ERR_PTR(-ENOMEM);
621}
622EXPORT_SYMBOL(ib_create_cm_id);
623
624static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
625{
626 struct cm_work *work;
627
628 if (list_empty(&cm_id_priv->work_list))
629 return NULL;
630
631 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
632 list_del(&work->list);
633 return work;
634}
635
636static void cm_free_work(struct cm_work *work)
637{
638 if (work->mad_recv_wc)
639 ib_free_recv_mad(work->mad_recv_wc);
640 kfree(work);
641}
642
643static inline int cm_convert_to_ms(int iba_time)
644{
645 /* approximate conversion to ms from 4.096us x 2^iba_time */
646 return 1 << max(iba_time - 8, 0);
647}
648
649static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
650{
a977049d
HR		 651 if (timewait_info->inserted_remote_id) {
652 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
653 timewait_info->inserted_remote_id = 0;
654 }
655
656 if (timewait_info->inserted_remote_qp) {
657 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
658 timewait_info->inserted_remote_qp = 0;
659 }
a977049d
HR		 660}
661
97f52eb4 662static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 663{
664 struct cm_timewait_info *timewait_info;
665
de6eb66b 666 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
a977049d
HR		 667 if (!timewait_info)
668 return ERR_PTR(-ENOMEM);
a977049d
HR		 669
670 timewait_info->work.local_id = local_id;
c4028958 671 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
a977049d
HR		 672 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
673 return timewait_info;
674}
675
676static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
677{
678 int wait_time;
8575329d 679 unsigned long flags;
a977049d 680
8575329d 681 spin_lock_irqsave(&cm.lock, flags);
a70d0590 682 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d
SH		 683 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
684 spin_unlock_irqrestore(&cm.lock, flags);
a70d0590 685
a977049d
HR		 686 /*
687 * The cm_id could be destroyed by the user before we exit timewait.
688 * To protect against this, we search for the cm_id after exiting
689 * timewait before notifying the user that we've exited timewait.
690 */
691 cm_id_priv->id.state = IB_CM_TIMEWAIT;
e1444b5a 692 wait_time = cm_convert_to_ms(cm_id_priv->av.packet_life_time + 1);
a977049d
HR		 693 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
694 msecs_to_jiffies(wait_time));
695 cm_id_priv->timewait_info = NULL;
696}
697
698static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
699{
8575329d
SH		 700 unsigned long flags;
701
a977049d
HR		 702 cm_id_priv->id.state = IB_CM_IDLE;
703 if (cm_id_priv->timewait_info) {
8575329d 704 spin_lock_irqsave(&cm.lock, flags);
a977049d 705 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d 706 spin_unlock_irqrestore(&cm.lock, flags);
a977049d
HR		 707 kfree(cm_id_priv->timewait_info);
708 cm_id_priv->timewait_info = NULL;
709 }
710}
711
04c33543 712static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
a977049d
HR		 713{
714 struct cm_id_private *cm_id_priv;
715 struct cm_work *work;
716 unsigned long flags;
717
718 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
719retest:
720 spin_lock_irqsave(&cm_id_priv->lock, flags);
721 switch (cm_id->state) {
722 case IB_CM_LISTEN:
723 cm_id->state = IB_CM_IDLE;
724 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
725 spin_lock_irqsave(&cm.lock, flags);
726 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
727 spin_unlock_irqrestore(&cm.lock, flags);
728 break;
729 case IB_CM_SIDR_REQ_SENT:
730 cm_id->state = IB_CM_IDLE;
34816ad9 731 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 732 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
733 break;
734 case IB_CM_SIDR_REQ_RCVD:
735 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
736 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
737 break;
738 case IB_CM_REQ_SENT:
227eca83
SH		 739 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
740 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
741 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
e971b8cd
SH		 742 &cm_id_priv->id.device->node_guid,
743 sizeof cm_id_priv->id.device->node_guid,
227eca83
SH		 744 NULL, 0);
745 break;
04c33543
MT		 746 case IB_CM_REQ_RCVD:
747 if (err == -ENOMEM) {
748 /* Do not reject to allow future retries. */
749 cm_reset_to_idle(cm_id_priv);
750 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
751 } else {
752 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
753 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
754 NULL, 0, NULL, 0);
755 }
756 break;
a977049d
HR		 757 case IB_CM_MRA_REQ_RCVD:
758 case IB_CM_REP_SENT:
759 case IB_CM_MRA_REP_RCVD:
34816ad9 760 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 761 /* Fall through */
a977049d
HR		 762 case IB_CM_MRA_REQ_SENT:
763 case IB_CM_REP_RCVD:
764 case IB_CM_MRA_REP_SENT:
765 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
227eca83
SH		 766 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
767 NULL, 0, NULL, 0);
a977049d
HR		 768 break;
769 case IB_CM_ESTABLISHED:
770 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
771 ib_send_cm_dreq(cm_id, NULL, 0);
772 goto retest;
773 case IB_CM_DREQ_SENT:
34816ad9 774 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 775 cm_enter_timewait(cm_id_priv);
776 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
777 break;
778 case IB_CM_DREQ_RCVD:
779 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
780 ib_send_cm_drep(cm_id, NULL, 0);
781 break;
782 default:
783 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
784 break;
785 }
786
787 cm_free_id(cm_id->local_id);
1b52fa98
SH		 788 cm_deref_id(cm_id_priv);
789 wait_for_completion(&cm_id_priv->comp);
a977049d
HR		 790 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
791 cm_free_work(work);
6e61d04f
SH		 792 kfree(cm_id_priv->compare_data);
793 kfree(cm_id_priv->private_data);
a977049d
HR		 794 kfree(cm_id_priv);
795}
04c33543
MT		 796
797void ib_destroy_cm_id(struct ib_cm_id *cm_id)
798{
799 cm_destroy_id(cm_id, 0);
800}
a977049d
HR		 801EXPORT_SYMBOL(ib_destroy_cm_id);
802
6e61d04f
SH		 803int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
804 struct ib_cm_compare_data *compare_data)
a977049d
HR		 805{
806 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
807 unsigned long flags;
808 int ret = 0;
809
97f52eb4
SH		 810 service_mask = service_mask ? service_mask :
811 __constant_cpu_to_be64(~0ULL);
a977049d
HR		 812 service_id &= service_mask;
813 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
814 (service_id != IB_CM_ASSIGN_SERVICE_ID))
815 return -EINVAL;
816
817 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
6e61d04f
SH		 818 if (cm_id->state != IB_CM_IDLE)
819 return -EINVAL;
820
821 if (compare_data) {
822 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
823 GFP_KERNEL);
824 if (!cm_id_priv->compare_data)
825 return -ENOMEM;
826 cm_mask_copy(cm_id_priv->compare_data->data,
827 compare_data->data, compare_data->mask);
828 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
829 IB_CM_COMPARE_SIZE);
830 }
a977049d
HR		 831
832 cm_id->state = IB_CM_LISTEN;
833
834 spin_lock_irqsave(&cm.lock, flags);
835 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
97f52eb4
SH		 836 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
837 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 838 } else {
839 cm_id->service_id = service_id;
840 cm_id->service_mask = service_mask;
841 }
842 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
843 spin_unlock_irqrestore(&cm.lock, flags);
844
845 if (cur_cm_id_priv) {
846 cm_id->state = IB_CM_IDLE;
6e61d04f
SH		 847 kfree(cm_id_priv->compare_data);
848 cm_id_priv->compare_data = NULL;
a977049d
HR		 849 ret = -EBUSY;
850 }
851 return ret;
852}
853EXPORT_SYMBOL(ib_cm_listen);
854
97f52eb4
SH		 855static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
856 enum cm_msg_sequence msg_seq)
a977049d
HR		 857{
858 u64 hi_tid, low_tid;
859
860 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
97f52eb4
SH		 861 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
862 (msg_seq << 30));
a977049d
HR		 863 return cpu_to_be64(hi_tid | low_tid);
864}
865
866static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 867 __be16 attr_id, __be64 tid)
a977049d
HR		 868{
869 hdr->base_version = IB_MGMT_BASE_VERSION;
870 hdr->mgmt_class = IB_MGMT_CLASS_CM;
871 hdr->class_version = IB_CM_CLASS_VERSION;
872 hdr->method = IB_MGMT_METHOD_SEND;
873 hdr->attr_id = attr_id;
874 hdr->tid = tid;
875}
876
877static void cm_format_req(struct cm_req_msg *req_msg,
878 struct cm_id_private *cm_id_priv,
879 struct ib_cm_req_param *param)
880{
881 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
882 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
883
884 req_msg->local_comm_id = cm_id_priv->id.local_id;
885 req_msg->service_id = param->service_id;
e971b8cd 886 req_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
a977049d
HR		 887 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
888 cm_req_set_resp_res(req_msg, param->responder_resources);
889 cm_req_set_init_depth(req_msg, param->initiator_depth);
890 cm_req_set_remote_resp_timeout(req_msg,
891 param->remote_cm_response_timeout);
892 cm_req_set_qp_type(req_msg, param->qp_type);
893 cm_req_set_flow_ctrl(req_msg, param->flow_control);
894 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
895 cm_req_set_local_resp_timeout(req_msg,
896 param->local_cm_response_timeout);
897 cm_req_set_retry_count(req_msg, param->retry_count);
898 req_msg->pkey = param->primary_path->pkey;
899 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
900 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
901 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
902 cm_req_set_srq(req_msg, param->srq);
903
904 req_msg->primary_local_lid = param->primary_path->slid;
905 req_msg->primary_remote_lid = param->primary_path->dlid;
906 req_msg->primary_local_gid = param->primary_path->sgid;
907 req_msg->primary_remote_gid = param->primary_path->dgid;
908 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
909 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
910 req_msg->primary_traffic_class = param->primary_path->traffic_class;
911 req_msg->primary_hop_limit = param->primary_path->hop_limit;
912 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
913 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
914 cm_req_set_primary_local_ack_timeout(req_msg,
915 min(31, param->primary_path->packet_life_time + 1));
916
917 if (param->alternate_path) {
918 req_msg->alt_local_lid = param->alternate_path->slid;
919 req_msg->alt_remote_lid = param->alternate_path->dlid;
920 req_msg->alt_local_gid = param->alternate_path->sgid;
921 req_msg->alt_remote_gid = param->alternate_path->dgid;
922 cm_req_set_alt_flow_label(req_msg,
923 param->alternate_path->flow_label);
924 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
925 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
926 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
927 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
928 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
929 cm_req_set_alt_local_ack_timeout(req_msg,
930 min(31, param->alternate_path->packet_life_time + 1));
931 }
932
933 if (param->private_data && param->private_data_len)
934 memcpy(req_msg->private_data, param->private_data,
935 param->private_data_len);
936}
937
858119e1 938static int cm_validate_req_param(struct ib_cm_req_param *param)
a977049d
HR		 939{
940 /* peer-to-peer not supported */
941 if (param->peer_to_peer)
942 return -EINVAL;
943
944 if (!param->primary_path)
945 return -EINVAL;
946
947 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
948 return -EINVAL;
949
950 if (param->private_data &&
951 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
952 return -EINVAL;
953
954 if (param->alternate_path &&
955 (param->alternate_path->pkey != param->primary_path->pkey ||
956 param->alternate_path->mtu != param->primary_path->mtu))
957 return -EINVAL;
958
959 return 0;
960}
961
962int ib_send_cm_req(struct ib_cm_id *cm_id,
963 struct ib_cm_req_param *param)
964{
965 struct cm_id_private *cm_id_priv;
a977049d
HR		 966 struct cm_req_msg *req_msg;
967 unsigned long flags;
968 int ret;
969
970 ret = cm_validate_req_param(param);
971 if (ret)
972 return ret;
973
974 /* Verify that we're not in timewait. */
975 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
976 spin_lock_irqsave(&cm_id_priv->lock, flags);
977 if (cm_id->state != IB_CM_IDLE) {
978 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
979 ret = -EINVAL;
980 goto out;
981 }
982 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
983
984 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
985 id.local_id);
75df23e2
SH		 986 if (IS_ERR(cm_id_priv->timewait_info)) {
987 ret = PTR_ERR(cm_id_priv->timewait_info);
a977049d 988 goto out;
75df23e2 989 }
a977049d
HR		 990
991 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
992 if (ret)
993 goto error1;
994 if (param->alternate_path) {
995 ret = cm_init_av_by_path(param->alternate_path,
996 &cm_id_priv->alt_av);
997 if (ret)
998 goto error1;
999 }
1000 cm_id->service_id = param->service_id;
97f52eb4 1001 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1002 cm_id_priv->timeout_ms = cm_convert_to_ms(
1003 param->primary_path->packet_life_time) * 2 +
1004 cm_convert_to_ms(
1005 param->remote_cm_response_timeout);
1006 cm_id_priv->max_cm_retries = param->max_cm_retries;
1007 cm_id_priv->initiator_depth = param->initiator_depth;
1008 cm_id_priv->responder_resources = param->responder_resources;
1009 cm_id_priv->retry_count = param->retry_count;
1010 cm_id_priv->path_mtu = param->primary_path->mtu;
e1444b5a 1011 cm_id_priv->pkey = param->primary_path->pkey;
ae7971a7 1012 cm_id_priv->qp_type = param->qp_type;
a977049d
HR		 1013
1014 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1015 if (ret)
1016 goto error1;
1017
1018 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1019 cm_format_req(req_msg, cm_id_priv, param);
1020 cm_id_priv->tid = req_msg->hdr.tid;
34816ad9 1021 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1022 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1023
1024 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1025 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
a977049d
HR		 1026
1027 spin_lock_irqsave(&cm_id_priv->lock, flags);
34816ad9 1028 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
a977049d
HR		 1029 if (ret) {
1030 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1031 goto error2;
1032 }
1033 BUG_ON(cm_id->state != IB_CM_IDLE);
1034 cm_id->state = IB_CM_REQ_SENT;
1035 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1036 return 0;
1037
1038error2: cm_free_msg(cm_id_priv->msg);
1039error1: kfree(cm_id_priv->timewait_info);
1040out: return ret;
1041}
1042EXPORT_SYMBOL(ib_send_cm_req);
1043
1044static int cm_issue_rej(struct cm_port *port,
1045 struct ib_mad_recv_wc *mad_recv_wc,
1046 enum ib_cm_rej_reason reason,
1047 enum cm_msg_response msg_rejected,
1048 void *ari, u8 ari_length)
1049{
1050 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1051 struct cm_rej_msg *rej_msg, *rcv_msg;
1052 int ret;
1053
1054 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1055 if (ret)
1056 return ret;
1057
1058 /* We just need common CM header information. Cast to any message. */
1059 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1060 rej_msg = (struct cm_rej_msg *) msg->mad;
1061
1062 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1063 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1064 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1065 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 1066 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1067
1068 if (ari && ari_length) {
1069 cm_rej_set_reject_info_len(rej_msg, ari_length);
1070 memcpy(rej_msg->ari, ari, ari_length);
1071 }
1072
34816ad9 1073 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1074 if (ret)
1075 cm_free_msg(msg);
1076
1077 return ret;
1078}
1079
97f52eb4
SH		 1080static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1081 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 1082{
1083 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1084 ((local_ca_guid == remote_ca_guid) &&
1085 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1086}
1087
858119e1 1088static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
a977049d
HR		 1089 struct ib_sa_path_rec *primary_path,
1090 struct ib_sa_path_rec *alt_path)
1091{
1092 memset(primary_path, 0, sizeof *primary_path);
1093 primary_path->dgid = req_msg->primary_local_gid;
1094 primary_path->sgid = req_msg->primary_remote_gid;
1095 primary_path->dlid = req_msg->primary_local_lid;
1096 primary_path->slid = req_msg->primary_remote_lid;
1097 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1098 primary_path->hop_limit = req_msg->primary_hop_limit;
1099 primary_path->traffic_class = req_msg->primary_traffic_class;
1100 primary_path->reversible = 1;
1101 primary_path->pkey = req_msg->pkey;
1102 primary_path->sl = cm_req_get_primary_sl(req_msg);
1103 primary_path->mtu_selector = IB_SA_EQ;
1104 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1105 primary_path->rate_selector = IB_SA_EQ;
1106 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1107 primary_path->packet_life_time_selector = IB_SA_EQ;
1108 primary_path->packet_life_time =
1109 cm_req_get_primary_local_ack_timeout(req_msg);
1110 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1111
1112 if (req_msg->alt_local_lid) {
1113 memset(alt_path, 0, sizeof *alt_path);
1114 alt_path->dgid = req_msg->alt_local_gid;
1115 alt_path->sgid = req_msg->alt_remote_gid;
1116 alt_path->dlid = req_msg->alt_local_lid;
1117 alt_path->slid = req_msg->alt_remote_lid;
1118 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1119 alt_path->hop_limit = req_msg->alt_hop_limit;
1120 alt_path->traffic_class = req_msg->alt_traffic_class;
1121 alt_path->reversible = 1;
1122 alt_path->pkey = req_msg->pkey;
1123 alt_path->sl = cm_req_get_alt_sl(req_msg);
1124 alt_path->mtu_selector = IB_SA_EQ;
1125 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1126 alt_path->rate_selector = IB_SA_EQ;
1127 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1128 alt_path->packet_life_time_selector = IB_SA_EQ;
1129 alt_path->packet_life_time =
1130 cm_req_get_alt_local_ack_timeout(req_msg);
1131 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1132 }
1133}
1134
1135static void cm_format_req_event(struct cm_work *work,
1136 struct cm_id_private *cm_id_priv,
1137 struct ib_cm_id *listen_id)
1138{
1139 struct cm_req_msg *req_msg;
1140 struct ib_cm_req_event_param *param;
1141
1142 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1143 param = &work->cm_event.param.req_rcvd;
1144 param->listen_id = listen_id;
a977049d
HR		 1145 param->port = cm_id_priv->av.port->port_num;
1146 param->primary_path = &work->path[0];
1147 if (req_msg->alt_local_lid)
1148 param->alternate_path = &work->path[1];
1149 else
1150 param->alternate_path = NULL;
1151 param->remote_ca_guid = req_msg->local_ca_guid;
1152 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1153 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1154 param->qp_type = cm_req_get_qp_type(req_msg);
1155 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1156 param->responder_resources = cm_req_get_init_depth(req_msg);
1157 param->initiator_depth = cm_req_get_resp_res(req_msg);
1158 param->local_cm_response_timeout =
1159 cm_req_get_remote_resp_timeout(req_msg);
1160 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1161 param->remote_cm_response_timeout =
1162 cm_req_get_local_resp_timeout(req_msg);
1163 param->retry_count = cm_req_get_retry_count(req_msg);
1164 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1165 param->srq = cm_req_get_srq(req_msg);
1166 work->cm_event.private_data = &req_msg->private_data;
1167}
1168
1169static void cm_process_work(struct cm_id_private *cm_id_priv,
1170 struct cm_work *work)
1171{
1172 unsigned long flags;
1173 int ret;
1174
1175 /* We will typically only have the current event to report. */
1176 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1177 cm_free_work(work);
1178
1179 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1180 spin_lock_irqsave(&cm_id_priv->lock, flags);
1181 work = cm_dequeue_work(cm_id_priv);
1182 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1183 BUG_ON(!work);
1184 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1185 &work->cm_event);
1186 cm_free_work(work);
1187 }
1188 cm_deref_id(cm_id_priv);
1189 if (ret)
04c33543 1190 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 1191}
1192
1193static void cm_format_mra(struct cm_mra_msg *mra_msg,
1194 struct cm_id_private *cm_id_priv,
1195 enum cm_msg_response msg_mraed, u8 service_timeout,
1196 const void *private_data, u8 private_data_len)
1197{
1198 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1199 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1200 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1201 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1202 cm_mra_set_service_timeout(mra_msg, service_timeout);
1203
1204 if (private_data && private_data_len)
1205 memcpy(mra_msg->private_data, private_data, private_data_len);
1206}
1207
1208static void cm_format_rej(struct cm_rej_msg *rej_msg,
1209 struct cm_id_private *cm_id_priv,
1210 enum ib_cm_rej_reason reason,
1211 void *ari,
1212 u8 ari_length,
1213 const void *private_data,
1214 u8 private_data_len)
1215{
1216 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1217 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1218
1219 switch(cm_id_priv->id.state) {
1220 case IB_CM_REQ_RCVD:
1221 rej_msg->local_comm_id = 0;
1222 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1223 break;
1224 case IB_CM_MRA_REQ_SENT:
1225 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1226 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1227 break;
1228 case IB_CM_REP_RCVD:
1229 case IB_CM_MRA_REP_SENT:
1230 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1231 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1232 break;
1233 default:
1234 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1235 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1236 break;
1237 }
1238
97f52eb4 1239 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1240 if (ari && ari_length) {
1241 cm_rej_set_reject_info_len(rej_msg, ari_length);
1242 memcpy(rej_msg->ari, ari, ari_length);
1243 }
1244
1245 if (private_data && private_data_len)
1246 memcpy(rej_msg->private_data, private_data, private_data_len);
1247}
1248
1249static void cm_dup_req_handler(struct cm_work *work,
1250 struct cm_id_private *cm_id_priv)
1251{
1252 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1253 unsigned long flags;
1254 int ret;
1255
1256 /* Quick state check to discard duplicate REQs. */
1257 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1258 return;
1259
1260 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1261 if (ret)
1262 return;
1263
1264 spin_lock_irqsave(&cm_id_priv->lock, flags);
1265 switch (cm_id_priv->id.state) {
1266 case IB_CM_MRA_REQ_SENT:
1267 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1268 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1269 cm_id_priv->private_data,
1270 cm_id_priv->private_data_len);
1271 break;
1272 case IB_CM_TIMEWAIT:
1273 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1274 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1275 break;
1276 default:
1277 goto unlock;
1278 }
1279 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1280
34816ad9 1281 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1282 if (ret)
1283 goto free;
1284 return;
1285
1286unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1287free: cm_free_msg(msg);
1288}
1289
1290static struct cm_id_private * cm_match_req(struct cm_work *work,
1291 struct cm_id_private *cm_id_priv)
1292{
1293 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1294 struct cm_timewait_info *timewait_info;
1295 struct cm_req_msg *req_msg;
1296 unsigned long flags;
1297
1298 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1299
d998ccce 1300 /* Check for possible duplicate REQ. */
a977049d
HR		 1301 spin_lock_irqsave(&cm.lock, flags);
1302 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
a977049d
HR		 1303 if (timewait_info) {
1304 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1305 timewait_info->work.remote_id);
1306 spin_unlock_irqrestore(&cm.lock, flags);
1307 if (cur_cm_id_priv) {
1308 cm_dup_req_handler(work, cur_cm_id_priv);
1309 cm_deref_id(cur_cm_id_priv);
d998ccce
SH		 1310 }
1311 return NULL;
1312 }
1313
1314 /* Check for stale connections. */
1315 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1316 if (timewait_info) {
1317 cm_cleanup_timewait(cm_id_priv->timewait_info);
1318 spin_unlock_irqrestore(&cm.lock, flags);
1319 cm_issue_rej(work->port, work->mad_recv_wc,
1320 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1321 NULL, 0);
1322 return NULL;
a977049d
HR		 1323 }
1324
1325 /* Find matching listen request. */
07d357d0 1326 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
6e61d04f
SH		 1327 req_msg->service_id,
1328 req_msg->private_data);
a977049d 1329 if (!listen_cm_id_priv) {
8575329d 1330 cm_cleanup_timewait(cm_id_priv->timewait_info);
a977049d
HR		 1331 spin_unlock_irqrestore(&cm.lock, flags);
1332 cm_issue_rej(work->port, work->mad_recv_wc,
1333 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1334 NULL, 0);
8575329d 1335 goto out;
a977049d
HR		 1336 }
1337 atomic_inc(&listen_cm_id_priv->refcount);
1338 atomic_inc(&cm_id_priv->refcount);
1339 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1340 atomic_inc(&cm_id_priv->work_count);
1341 spin_unlock_irqrestore(&cm.lock, flags);
8575329d 1342out:
a977049d 1343 return listen_cm_id_priv;
a977049d
HR		 1344}
1345
1346static int cm_req_handler(struct cm_work *work)
1347{
1348 struct ib_cm_id *cm_id;
1349 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1350 struct cm_req_msg *req_msg;
1351 int ret;
1352
1353 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1354
07d357d0 1355 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 1356 if (IS_ERR(cm_id))
1357 return PTR_ERR(cm_id);
1358
1359 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1360 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1361 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 1362 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 1363 &cm_id_priv->av);
1364 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1365 id.local_id);
1366 if (IS_ERR(cm_id_priv->timewait_info)) {
1367 ret = PTR_ERR(cm_id_priv->timewait_info);
76842405 1368 goto destroy;
a977049d
HR		 1369 }
1370 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1371 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1372 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1373
1374 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1375 if (!listen_cm_id_priv) {
1376 ret = -EINVAL;
76842405
SH		 1377 kfree(cm_id_priv->timewait_info);
1378 goto destroy;
a977049d
HR		 1379 }
1380
1381 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1382 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1383 cm_id_priv->id.service_id = req_msg->service_id;
97f52eb4 1384 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1385
1386 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1387 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
76842405
SH		 1388 if (ret) {
1389 ib_get_cached_gid(work->port->cm_dev->device,
1390 work->port->port_num, 0, &work->path[0].sgid);
1391 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1392 &work->path[0].sgid, sizeof work->path[0].sgid,
1393 NULL, 0);
1394 goto rejected;
1395 }
a977049d
HR		 1396 if (req_msg->alt_local_lid) {
1397 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
76842405
SH		 1398 if (ret) {
1399 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1400 &work->path[0].sgid,
1401 sizeof work->path[0].sgid, NULL, 0);
1402 goto rejected;
1403 }
a977049d
HR		 1404 }
1405 cm_id_priv->tid = req_msg->hdr.tid;
1406 cm_id_priv->timeout_ms = cm_convert_to_ms(
1407 cm_req_get_local_resp_timeout(req_msg));
1408 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1409 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1410 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1411 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1412 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
e1444b5a 1413 cm_id_priv->pkey = req_msg->pkey;
a977049d 1414 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
a977049d
HR		 1415 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1416 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
ae7971a7 1417 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
a977049d
HR		 1418
1419 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1420 cm_process_work(cm_id_priv, work);
1421 cm_deref_id(listen_cm_id_priv);
1422 return 0;
1423
76842405
SH		 1424rejected:
1425 atomic_dec(&cm_id_priv->refcount);
a977049d 1426 cm_deref_id(listen_cm_id_priv);
76842405
SH		 1427destroy:
1428 ib_destroy_cm_id(cm_id);
a977049d
HR		 1429 return ret;
1430}
1431
1432static void cm_format_rep(struct cm_rep_msg *rep_msg,
1433 struct cm_id_private *cm_id_priv,
1434 struct ib_cm_rep_param *param)
1435{
1436 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1437 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1438 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1439 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1440 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1441 rep_msg->resp_resources = param->responder_resources;
1442 rep_msg->initiator_depth = param->initiator_depth;
1443 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1444 cm_rep_set_failover(rep_msg, param->failover_accepted);
1445 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1446 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1447 cm_rep_set_srq(rep_msg, param->srq);
e971b8cd 1448 rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
a977049d
HR		 1449
1450 if (param->private_data && param->private_data_len)
1451 memcpy(rep_msg->private_data, param->private_data,
1452 param->private_data_len);
1453}
1454
1455int ib_send_cm_rep(struct ib_cm_id *cm_id,
1456 struct ib_cm_rep_param *param)
1457{
1458 struct cm_id_private *cm_id_priv;
1459 struct ib_mad_send_buf *msg;
1460 struct cm_rep_msg *rep_msg;
a977049d
HR		 1461 unsigned long flags;
1462 int ret;
1463
1464 if (param->private_data &&
1465 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1466 return -EINVAL;
1467
1468 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1469 spin_lock_irqsave(&cm_id_priv->lock, flags);
1470 if (cm_id->state != IB_CM_REQ_RCVD &&
1471 cm_id->state != IB_CM_MRA_REQ_SENT) {
1472 ret = -EINVAL;
1473 goto out;
1474 }
1475
1476 ret = cm_alloc_msg(cm_id_priv, &msg);
1477 if (ret)
1478 goto out;
1479
1480 rep_msg = (struct cm_rep_msg *) msg->mad;
1481 cm_format_rep(rep_msg, cm_id_priv, param);
34816ad9 1482 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1483 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1484
34816ad9 1485 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1486 if (ret) {
1487 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1488 cm_free_msg(msg);
1489 return ret;
1490 }
1491
1492 cm_id->state = IB_CM_REP_SENT;
1493 cm_id_priv->msg = msg;
1494 cm_id_priv->initiator_depth = param->initiator_depth;
1495 cm_id_priv->responder_resources = param->responder_resources;
1496 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1497 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1498
1499out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1500 return ret;
1501}
1502EXPORT_SYMBOL(ib_send_cm_rep);
1503
1504static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1505 struct cm_id_private *cm_id_priv,
1506 const void *private_data,
1507 u8 private_data_len)
1508{
1509 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1510 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1511 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1512
1513 if (private_data && private_data_len)
1514 memcpy(rtu_msg->private_data, private_data, private_data_len);
1515}
1516
1517int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1518 const void *private_data,
1519 u8 private_data_len)
1520{
1521 struct cm_id_private *cm_id_priv;
1522 struct ib_mad_send_buf *msg;
a977049d
HR		 1523 unsigned long flags;
1524 void *data;
1525 int ret;
1526
1527 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1528 return -EINVAL;
1529
1530 data = cm_copy_private_data(private_data, private_data_len);
1531 if (IS_ERR(data))
1532 return PTR_ERR(data);
1533
1534 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1535 spin_lock_irqsave(&cm_id_priv->lock, flags);
1536 if (cm_id->state != IB_CM_REP_RCVD &&
1537 cm_id->state != IB_CM_MRA_REP_SENT) {
1538 ret = -EINVAL;
1539 goto error;
1540 }
1541
1542 ret = cm_alloc_msg(cm_id_priv, &msg);
1543 if (ret)
1544 goto error;
1545
1546 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1547 private_data, private_data_len);
1548
34816ad9 1549 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1550 if (ret) {
1551 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1552 cm_free_msg(msg);
1553 kfree(data);
1554 return ret;
1555 }
1556
1557 cm_id->state = IB_CM_ESTABLISHED;
1558 cm_set_private_data(cm_id_priv, data, private_data_len);
1559 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1560 return 0;
1561
1562error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1563 kfree(data);
1564 return ret;
1565}
1566EXPORT_SYMBOL(ib_send_cm_rtu);
1567
1568static void cm_format_rep_event(struct cm_work *work)
1569{
1570 struct cm_rep_msg *rep_msg;
1571 struct ib_cm_rep_event_param *param;
1572
1573 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1574 param = &work->cm_event.param.rep_rcvd;
1575 param->remote_ca_guid = rep_msg->local_ca_guid;
1576 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1577 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1578 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1579 param->responder_resources = rep_msg->initiator_depth;
1580 param->initiator_depth = rep_msg->resp_resources;
1581 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1582 param->failover_accepted = cm_rep_get_failover(rep_msg);
1583 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1584 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1585 param->srq = cm_rep_get_srq(rep_msg);
1586 work->cm_event.private_data = &rep_msg->private_data;
1587}
1588
1589static void cm_dup_rep_handler(struct cm_work *work)
1590{
1591 struct cm_id_private *cm_id_priv;
1592 struct cm_rep_msg *rep_msg;
1593 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1594 unsigned long flags;
1595 int ret;
1596
1597 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1598 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1599 rep_msg->local_comm_id);
1600 if (!cm_id_priv)
1601 return;
1602
1603 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1604 if (ret)
1605 goto deref;
1606
1607 spin_lock_irqsave(&cm_id_priv->lock, flags);
1608 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1609 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1610 cm_id_priv->private_data,
1611 cm_id_priv->private_data_len);
1612 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1613 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1614 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1615 cm_id_priv->private_data,
1616 cm_id_priv->private_data_len);
1617 else
1618 goto unlock;
1619 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1620
34816ad9 1621 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1622 if (ret)
1623 goto free;
1624 goto deref;
1625
1626unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1627free: cm_free_msg(msg);
1628deref: cm_deref_id(cm_id_priv);
1629}
1630
1631static int cm_rep_handler(struct cm_work *work)
1632{
1633 struct cm_id_private *cm_id_priv;
1634 struct cm_rep_msg *rep_msg;
1635 unsigned long flags;
1636 int ret;
1637
1638 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1639 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1640 if (!cm_id_priv) {
1641 cm_dup_rep_handler(work);
1642 return -EINVAL;
1643 }
1644
87fd1a11
SH		 1645 cm_format_rep_event(work);
1646
1647 spin_lock_irqsave(&cm_id_priv->lock, flags);
1648 switch (cm_id_priv->id.state) {
1649 case IB_CM_REQ_SENT:
1650 case IB_CM_MRA_REQ_RCVD:
1651 break;
1652 default:
1653 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1654 ret = -EINVAL;
1655 goto error;
1656 }
1657
a977049d
HR		 1658 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1659 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1660 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1661
87fd1a11 1662 spin_lock(&cm.lock);
a977049d
HR		 1663 /* Check for duplicate REP. */
1664 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1665 spin_unlock(&cm.lock);
1666 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1667 ret = -EINVAL;
1668 goto error;
1669 }
1670 /* Check for a stale connection. */
1671 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1672 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1673 &cm.remote_id_table);
1674 cm_id_priv->timewait_info->inserted_remote_id = 0;
1675 spin_unlock(&cm.lock);
1676 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1677 cm_issue_rej(work->port, work->mad_recv_wc,
1678 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1679 NULL, 0);
1680 ret = -EINVAL;
1681 goto error;
1682 }
87fd1a11 1683 spin_unlock(&cm.lock);
a977049d 1684
a977049d
HR		 1685 cm_id_priv->id.state = IB_CM_REP_RCVD;
1686 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1687 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1688 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1689 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1690 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1691 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1692
1693 /* todo: handle peer_to_peer */
1694
34816ad9 1695 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1696 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1697 if (!ret)
1698 list_add_tail(&work->list, &cm_id_priv->work_list);
1699 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1700
1701 if (ret)
1702 cm_process_work(cm_id_priv, work);
1703 else
1704 cm_deref_id(cm_id_priv);
1705 return 0;
1706
87fd1a11 1707error:
a977049d
HR		 1708 cm_deref_id(cm_id_priv);
1709 return ret;
1710}
1711
1712static int cm_establish_handler(struct cm_work *work)
1713{
1714 struct cm_id_private *cm_id_priv;
1715 unsigned long flags;
1716 int ret;
1717
e1444b5a 1718 /* See comment in cm_establish about lookup. */
a977049d
HR		 1719 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1720 if (!cm_id_priv)
1721 return -EINVAL;
1722
1723 spin_lock_irqsave(&cm_id_priv->lock, flags);
1724 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1725 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1726 goto out;
1727 }
1728
34816ad9 1729 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1730 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1731 if (!ret)
1732 list_add_tail(&work->list, &cm_id_priv->work_list);
1733 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1734
1735 if (ret)
1736 cm_process_work(cm_id_priv, work);
1737 else
1738 cm_deref_id(cm_id_priv);
1739 return 0;
1740out:
1741 cm_deref_id(cm_id_priv);
1742 return -EINVAL;
1743}
1744
1745static int cm_rtu_handler(struct cm_work *work)
1746{
1747 struct cm_id_private *cm_id_priv;
1748 struct cm_rtu_msg *rtu_msg;
1749 unsigned long flags;
1750 int ret;
1751
1752 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1753 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1754 rtu_msg->local_comm_id);
1755 if (!cm_id_priv)
1756 return -EINVAL;
1757
1758 work->cm_event.private_data = &rtu_msg->private_data;
1759
1760 spin_lock_irqsave(&cm_id_priv->lock, flags);
1761 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1762 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1763 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1764 goto out;
1765 }
1766 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1767
34816ad9 1768 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1769 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1770 if (!ret)
1771 list_add_tail(&work->list, &cm_id_priv->work_list);
1772 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1773
1774 if (ret)
1775 cm_process_work(cm_id_priv, work);
1776 else
1777 cm_deref_id(cm_id_priv);
1778 return 0;
1779out:
1780 cm_deref_id(cm_id_priv);
1781 return -EINVAL;
1782}
1783
1784static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1785 struct cm_id_private *cm_id_priv,
1786 const void *private_data,
1787 u8 private_data_len)
1788{
1789 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1790 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1791 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1792 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1793 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1794
1795 if (private_data && private_data_len)
1796 memcpy(dreq_msg->private_data, private_data, private_data_len);
1797}
1798
1799int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1800 const void *private_data,
1801 u8 private_data_len)
1802{
1803 struct cm_id_private *cm_id_priv;
1804 struct ib_mad_send_buf *msg;
a977049d
HR		 1805 unsigned long flags;
1806 int ret;
1807
1808 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1809 return -EINVAL;
1810
1811 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1812 spin_lock_irqsave(&cm_id_priv->lock, flags);
1813 if (cm_id->state != IB_CM_ESTABLISHED) {
1814 ret = -EINVAL;
1815 goto out;
1816 }
1817
1818 ret = cm_alloc_msg(cm_id_priv, &msg);
1819 if (ret) {
1820 cm_enter_timewait(cm_id_priv);
1821 goto out;
1822 }
1823
1824 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1825 private_data, private_data_len);
34816ad9 1826 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1827 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1828
34816ad9 1829 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1830 if (ret) {
1831 cm_enter_timewait(cm_id_priv);
1832 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1833 cm_free_msg(msg);
1834 return ret;
1835 }
1836
1837 cm_id->state = IB_CM_DREQ_SENT;
1838 cm_id_priv->msg = msg;
1839out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1840 return ret;
1841}
1842EXPORT_SYMBOL(ib_send_cm_dreq);
1843
1844static void cm_format_drep(struct cm_drep_msg *drep_msg,
1845 struct cm_id_private *cm_id_priv,
1846 const void *private_data,
1847 u8 private_data_len)
1848{
1849 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1850 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1851 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1852
1853 if (private_data && private_data_len)
1854 memcpy(drep_msg->private_data, private_data, private_data_len);
1855}
1856
1857int ib_send_cm_drep(struct ib_cm_id *cm_id,
1858 const void *private_data,
1859 u8 private_data_len)
1860{
1861 struct cm_id_private *cm_id_priv;
1862 struct ib_mad_send_buf *msg;
a977049d
HR		 1863 unsigned long flags;
1864 void *data;
1865 int ret;
1866
1867 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1868 return -EINVAL;
1869
1870 data = cm_copy_private_data(private_data, private_data_len);
1871 if (IS_ERR(data))
1872 return PTR_ERR(data);
1873
1874 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1875 spin_lock_irqsave(&cm_id_priv->lock, flags);
1876 if (cm_id->state != IB_CM_DREQ_RCVD) {
1877 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1878 kfree(data);
1879 return -EINVAL;
1880 }
1881
1882 cm_set_private_data(cm_id_priv, data, private_data_len);
1883 cm_enter_timewait(cm_id_priv);
1884
1885 ret = cm_alloc_msg(cm_id_priv, &msg);
1886 if (ret)
1887 goto out;
1888
1889 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1890 private_data, private_data_len);
1891
34816ad9 1892 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1893 if (ret) {
1894 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1895 cm_free_msg(msg);
1896 return ret;
1897 }
1898
1899out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1900 return ret;
1901}
1902EXPORT_SYMBOL(ib_send_cm_drep);
1903
82a9c16a
SH		 1904static int cm_issue_drep(struct cm_port *port,
1905 struct ib_mad_recv_wc *mad_recv_wc)
1906{
1907 struct ib_mad_send_buf *msg = NULL;
1908 struct cm_dreq_msg *dreq_msg;
1909 struct cm_drep_msg *drep_msg;
1910 int ret;
1911
1912 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1913 if (ret)
1914 return ret;
1915
1916 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
1917 drep_msg = (struct cm_drep_msg *) msg->mad;
1918
1919 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
1920 drep_msg->remote_comm_id = dreq_msg->local_comm_id;
1921 drep_msg->local_comm_id = dreq_msg->remote_comm_id;
1922
1923 ret = ib_post_send_mad(msg, NULL);
1924 if (ret)
1925 cm_free_msg(msg);
1926
1927 return ret;
1928}
1929
a977049d
HR		 1930static int cm_dreq_handler(struct cm_work *work)
1931{
1932 struct cm_id_private *cm_id_priv;
1933 struct cm_dreq_msg *dreq_msg;
1934 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1935 unsigned long flags;
1936 int ret;
1937
1938 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1939 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1940 dreq_msg->local_comm_id);
82a9c16a
SH		 1941 if (!cm_id_priv) {
1942 cm_issue_drep(work->port, work->mad_recv_wc);
a977049d 1943 return -EINVAL;
82a9c16a 1944 }
a977049d
HR		 1945
1946 work->cm_event.private_data = &dreq_msg->private_data;
1947
1948 spin_lock_irqsave(&cm_id_priv->lock, flags);
1949 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1950 goto unlock;
1951
1952 switch (cm_id_priv->id.state) {
1953 case IB_CM_REP_SENT:
1954 case IB_CM_DREQ_SENT:
34816ad9 1955 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1956 break;
1957 case IB_CM_ESTABLISHED:
1958 case IB_CM_MRA_REP_RCVD:
1959 break;
1960 case IB_CM_TIMEWAIT:
1961 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1962 goto unlock;
1963
1964 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1965 cm_id_priv->private_data,
1966 cm_id_priv->private_data_len);
1967 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1968
34816ad9 1969 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 1970 cm_free_msg(msg);
1971 goto deref;
1972 default:
1973 goto unlock;
1974 }
1975 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1976 cm_id_priv->tid = dreq_msg->hdr.tid;
1977 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1978 if (!ret)
1979 list_add_tail(&work->list, &cm_id_priv->work_list);
1980 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1981
1982 if (ret)
1983 cm_process_work(cm_id_priv, work);
1984 else
1985 cm_deref_id(cm_id_priv);
1986 return 0;
1987
1988unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1989deref: cm_deref_id(cm_id_priv);
1990 return -EINVAL;
1991}
1992
1993static int cm_drep_handler(struct cm_work *work)
1994{
1995 struct cm_id_private *cm_id_priv;
1996 struct cm_drep_msg *drep_msg;
1997 unsigned long flags;
1998 int ret;
1999
2000 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
2001 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
2002 drep_msg->local_comm_id);
2003 if (!cm_id_priv)
2004 return -EINVAL;
2005
2006 work->cm_event.private_data = &drep_msg->private_data;
2007
2008 spin_lock_irqsave(&cm_id_priv->lock, flags);
2009 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2010 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
2011 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2012 goto out;
2013 }
2014 cm_enter_timewait(cm_id_priv);
2015
34816ad9 2016 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2017 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2018 if (!ret)
2019 list_add_tail(&work->list, &cm_id_priv->work_list);
2020 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2021
2022 if (ret)
2023 cm_process_work(cm_id_priv, work);
2024 else
2025 cm_deref_id(cm_id_priv);
2026 return 0;
2027out:
2028 cm_deref_id(cm_id_priv);
2029 return -EINVAL;
2030}
2031
2032int ib_send_cm_rej(struct ib_cm_id *cm_id,
2033 enum ib_cm_rej_reason reason,
2034 void *ari,
2035 u8 ari_length,
2036 const void *private_data,
2037 u8 private_data_len)
2038{
2039 struct cm_id_private *cm_id_priv;
2040 struct ib_mad_send_buf *msg;
a977049d
HR		 2041 unsigned long flags;
2042 int ret;
2043
2044 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2045 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2046 return -EINVAL;
2047
2048 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2049
2050 spin_lock_irqsave(&cm_id_priv->lock, flags);
2051 switch (cm_id->state) {
2052 case IB_CM_REQ_SENT:
2053 case IB_CM_MRA_REQ_RCVD:
2054 case IB_CM_REQ_RCVD:
2055 case IB_CM_MRA_REQ_SENT:
2056 case IB_CM_REP_RCVD:
2057 case IB_CM_MRA_REP_SENT:
2058 ret = cm_alloc_msg(cm_id_priv, &msg);
2059 if (!ret)
2060 cm_format_rej((struct cm_rej_msg *) msg->mad,
2061 cm_id_priv, reason, ari, ari_length,
2062 private_data, private_data_len);
2063
2064 cm_reset_to_idle(cm_id_priv);
2065 break;
2066 case IB_CM_REP_SENT:
2067 case IB_CM_MRA_REP_RCVD:
2068 ret = cm_alloc_msg(cm_id_priv, &msg);
2069 if (!ret)
2070 cm_format_rej((struct cm_rej_msg *) msg->mad,
2071 cm_id_priv, reason, ari, ari_length,
2072 private_data, private_data_len);
2073
2074 cm_enter_timewait(cm_id_priv);
2075 break;
2076 default:
2077 ret = -EINVAL;
2078 goto out;
2079 }
2080
2081 if (ret)
2082 goto out;
2083
34816ad9 2084 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2085 if (ret)
2086 cm_free_msg(msg);
2087
2088out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2089 return ret;
2090}
2091EXPORT_SYMBOL(ib_send_cm_rej);
2092
2093static void cm_format_rej_event(struct cm_work *work)
2094{
2095 struct cm_rej_msg *rej_msg;
2096 struct ib_cm_rej_event_param *param;
2097
2098 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2099 param = &work->cm_event.param.rej_rcvd;
2100 param->ari = rej_msg->ari;
2101 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 2102 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 2103 work->cm_event.private_data = &rej_msg->private_data;
2104}
2105
2106static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2107{
2108 struct cm_timewait_info *timewait_info;
2109 struct cm_id_private *cm_id_priv;
2110 unsigned long flags;
97f52eb4 2111 __be32 remote_id;
a977049d
HR		 2112
2113 remote_id = rej_msg->local_comm_id;
2114
97f52eb4 2115 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
a977049d 2116 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 2117 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 2118 remote_id);
2119 if (!timewait_info) {
2120 spin_unlock_irqrestore(&cm.lock, flags);
2121 return NULL;
2122 }
f06d2653
SH		 2123 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2124 (timewait_info->work.local_id ^
2125 cm.random_id_operand));
a977049d
HR		 2126 if (cm_id_priv) {
2127 if (cm_id_priv->id.remote_id == remote_id)
2128 atomic_inc(&cm_id_priv->refcount);
2129 else
2130 cm_id_priv = NULL;
2131 }
2132 spin_unlock_irqrestore(&cm.lock, flags);
2133 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2134 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2135 else
2136 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2137
2138 return cm_id_priv;
2139}
2140
2141static int cm_rej_handler(struct cm_work *work)
2142{
2143 struct cm_id_private *cm_id_priv;
2144 struct cm_rej_msg *rej_msg;
2145 unsigned long flags;
2146 int ret;
2147
2148 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2149 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2150 if (!cm_id_priv)
2151 return -EINVAL;
2152
2153 cm_format_rej_event(work);
2154
2155 spin_lock_irqsave(&cm_id_priv->lock, flags);
2156 switch (cm_id_priv->id.state) {
2157 case IB_CM_REQ_SENT:
2158 case IB_CM_MRA_REQ_RCVD:
2159 case IB_CM_REP_SENT:
2160 case IB_CM_MRA_REP_RCVD:
34816ad9 2161 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2162 /* fall through */
2163 case IB_CM_REQ_RCVD:
2164 case IB_CM_MRA_REQ_SENT:
97f52eb4 2165 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2166 cm_enter_timewait(cm_id_priv);
2167 else
2168 cm_reset_to_idle(cm_id_priv);
2169 break;
2170 case IB_CM_DREQ_SENT:
34816ad9 2171 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2172 /* fall through */
2173 case IB_CM_REP_RCVD:
2174 case IB_CM_MRA_REP_SENT:
2175 case IB_CM_ESTABLISHED:
2176 cm_enter_timewait(cm_id_priv);
2177 break;
2178 default:
2179 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2180 ret = -EINVAL;
2181 goto out;
2182 }
2183
2184 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2185 if (!ret)
2186 list_add_tail(&work->list, &cm_id_priv->work_list);
2187 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2188
2189 if (ret)
2190 cm_process_work(cm_id_priv, work);
2191 else
2192 cm_deref_id(cm_id_priv);
2193 return 0;
2194out:
2195 cm_deref_id(cm_id_priv);
2196 return -EINVAL;
2197}
2198
2199int ib_send_cm_mra(struct ib_cm_id *cm_id,
2200 u8 service_timeout,
2201 const void *private_data,
2202 u8 private_data_len)
2203{
2204 struct cm_id_private *cm_id_priv;
2205 struct ib_mad_send_buf *msg;
a977049d
HR		 2206 void *data;
2207 unsigned long flags;
2208 int ret;
2209
2210 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2211 return -EINVAL;
2212
2213 data = cm_copy_private_data(private_data, private_data_len);
2214 if (IS_ERR(data))
2215 return PTR_ERR(data);
2216
2217 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2218
2219 spin_lock_irqsave(&cm_id_priv->lock, flags);
2220 switch(cm_id_priv->id.state) {
2221 case IB_CM_REQ_RCVD:
2222 ret = cm_alloc_msg(cm_id_priv, &msg);
2223 if (ret)
2224 goto error1;
2225
2226 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2227 CM_MSG_RESPONSE_REQ, service_timeout,
2228 private_data, private_data_len);
34816ad9 2229 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2230 if (ret)
2231 goto error2;
2232 cm_id->state = IB_CM_MRA_REQ_SENT;
2233 break;
2234 case IB_CM_REP_RCVD:
2235 ret = cm_alloc_msg(cm_id_priv, &msg);
2236 if (ret)
2237 goto error1;
2238
2239 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2240 CM_MSG_RESPONSE_REP, service_timeout,
2241 private_data, private_data_len);
34816ad9 2242 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2243 if (ret)
2244 goto error2;
2245 cm_id->state = IB_CM_MRA_REP_SENT;
2246 break;
2247 case IB_CM_ESTABLISHED:
2248 ret = cm_alloc_msg(cm_id_priv, &msg);
2249 if (ret)
2250 goto error1;
2251
2252 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2253 CM_MSG_RESPONSE_OTHER, service_timeout,
2254 private_data, private_data_len);
34816ad9 2255 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2256 if (ret)
2257 goto error2;
2258 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2259 break;
2260 default:
2261 ret = -EINVAL;
2262 goto error1;
2263 }
2264 cm_id_priv->service_timeout = service_timeout;
2265 cm_set_private_data(cm_id_priv, data, private_data_len);
2266 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2267 return 0;
2268
2269error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2270 kfree(data);
2271 return ret;
2272
2273error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2274 kfree(data);
2275 cm_free_msg(msg);
2276 return ret;
2277}
2278EXPORT_SYMBOL(ib_send_cm_mra);
2279
2280static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2281{
2282 switch (cm_mra_get_msg_mraed(mra_msg)) {
2283 case CM_MSG_RESPONSE_REQ:
2284 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2285 case CM_MSG_RESPONSE_REP:
2286 case CM_MSG_RESPONSE_OTHER:
2287 return cm_acquire_id(mra_msg->remote_comm_id,
2288 mra_msg->local_comm_id);
2289 default:
2290 return NULL;
2291 }
2292}
2293
2294static int cm_mra_handler(struct cm_work *work)
2295{
2296 struct cm_id_private *cm_id_priv;
2297 struct cm_mra_msg *mra_msg;
2298 unsigned long flags;
2299 int timeout, ret;
2300
2301 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2302 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2303 if (!cm_id_priv)
2304 return -EINVAL;
2305
2306 work->cm_event.private_data = &mra_msg->private_data;
2307 work->cm_event.param.mra_rcvd.service_timeout =
2308 cm_mra_get_service_timeout(mra_msg);
2309 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2310 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2311
2312 spin_lock_irqsave(&cm_id_priv->lock, flags);
2313 switch (cm_id_priv->id.state) {
2314 case IB_CM_REQ_SENT:
2315 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2316 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2317 cm_id_priv->msg, timeout))
a977049d
HR		 2318 goto out;
2319 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2320 break;
2321 case IB_CM_REP_SENT:
2322 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2323 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2324 cm_id_priv->msg, timeout))
a977049d
HR		 2325 goto out;
2326 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2327 break;
2328 case IB_CM_ESTABLISHED:
2329 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2330 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2331 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2332 cm_id_priv->msg, timeout))
a977049d
HR		 2333 goto out;
2334 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2335 break;
2336 default:
2337 goto out;
2338 }
2339
2340 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2341 cm_id_priv->id.state;
2342 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2343 if (!ret)
2344 list_add_tail(&work->list, &cm_id_priv->work_list);
2345 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2346
2347 if (ret)
2348 cm_process_work(cm_id_priv, work);
2349 else
2350 cm_deref_id(cm_id_priv);
2351 return 0;
2352out:
2353 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2354 cm_deref_id(cm_id_priv);
2355 return -EINVAL;
2356}
2357
2358static void cm_format_lap(struct cm_lap_msg *lap_msg,
2359 struct cm_id_private *cm_id_priv,
2360 struct ib_sa_path_rec *alternate_path,
2361 const void *private_data,
2362 u8 private_data_len)
2363{
2364 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2365 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2366 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2367 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2368 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2369 /* todo: need remote CM response timeout */
2370 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2371 lap_msg->alt_local_lid = alternate_path->slid;
2372 lap_msg->alt_remote_lid = alternate_path->dlid;
2373 lap_msg->alt_local_gid = alternate_path->sgid;
2374 lap_msg->alt_remote_gid = alternate_path->dgid;
2375 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2376 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2377 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2378 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2379 cm_lap_set_sl(lap_msg, alternate_path->sl);
2380 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2381 cm_lap_set_local_ack_timeout(lap_msg,
2382 min(31, alternate_path->packet_life_time + 1));
2383
2384 if (private_data && private_data_len)
2385 memcpy(lap_msg->private_data, private_data, private_data_len);
2386}
2387
2388int ib_send_cm_lap(struct ib_cm_id *cm_id,
2389 struct ib_sa_path_rec *alternate_path,
2390 const void *private_data,
2391 u8 private_data_len)
2392{
2393 struct cm_id_private *cm_id_priv;
2394 struct ib_mad_send_buf *msg;
a977049d
HR		 2395 unsigned long flags;
2396 int ret;
2397
2398 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2399 return -EINVAL;
2400
2401 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2402 spin_lock_irqsave(&cm_id_priv->lock, flags);
2403 if (cm_id->state != IB_CM_ESTABLISHED ||
e1444b5a
SH		 2404 (cm_id->lap_state != IB_CM_LAP_UNINIT &&
2405 cm_id->lap_state != IB_CM_LAP_IDLE)) {
a977049d
HR		 2406 ret = -EINVAL;
2407 goto out;
2408 }
2409
e1444b5a
SH		 2410 ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av);
2411 if (ret)
2412 goto out;
2413
a977049d
HR		 2414 ret = cm_alloc_msg(cm_id_priv, &msg);
2415 if (ret)
2416 goto out;
2417
2418 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2419 alternate_path, private_data, private_data_len);
34816ad9 2420 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2421 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2422
34816ad9 2423 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2424 if (ret) {
2425 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2426 cm_free_msg(msg);
2427 return ret;
2428 }
2429
2430 cm_id->lap_state = IB_CM_LAP_SENT;
2431 cm_id_priv->msg = msg;
2432
2433out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2434 return ret;
2435}
2436EXPORT_SYMBOL(ib_send_cm_lap);
2437
e1444b5a
SH		 2438static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
2439 struct ib_sa_path_rec *path,
a977049d
HR		 2440 struct cm_lap_msg *lap_msg)
2441{
2442 memset(path, 0, sizeof *path);
2443 path->dgid = lap_msg->alt_local_gid;
2444 path->sgid = lap_msg->alt_remote_gid;
2445 path->dlid = lap_msg->alt_local_lid;
2446 path->slid = lap_msg->alt_remote_lid;
2447 path->flow_label = cm_lap_get_flow_label(lap_msg);
2448 path->hop_limit = lap_msg->alt_hop_limit;
2449 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2450 path->reversible = 1;
e1444b5a 2451 path->pkey = cm_id_priv->pkey;
a977049d
HR		 2452 path->sl = cm_lap_get_sl(lap_msg);
2453 path->mtu_selector = IB_SA_EQ;
e1444b5a 2454 path->mtu = cm_id_priv->path_mtu;
a977049d
HR		 2455 path->rate_selector = IB_SA_EQ;
2456 path->rate = cm_lap_get_packet_rate(lap_msg);
2457 path->packet_life_time_selector = IB_SA_EQ;
2458 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2459 path->packet_life_time -= (path->packet_life_time > 0);
2460}
2461
2462static int cm_lap_handler(struct cm_work *work)
2463{
2464 struct cm_id_private *cm_id_priv;
2465 struct cm_lap_msg *lap_msg;
2466 struct ib_cm_lap_event_param *param;
2467 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2468 unsigned long flags;
2469 int ret;
2470
2471 /* todo: verify LAP request and send reject APR if invalid. */
2472 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2473 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2474 lap_msg->local_comm_id);
2475 if (!cm_id_priv)
2476 return -EINVAL;
2477
2478 param = &work->cm_event.param.lap_rcvd;
2479 param->alternate_path = &work->path[0];
e1444b5a 2480 cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
a977049d
HR		 2481 work->cm_event.private_data = &lap_msg->private_data;
2482
2483 spin_lock_irqsave(&cm_id_priv->lock, flags);
2484 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2485 goto unlock;
2486
2487 switch (cm_id_priv->id.lap_state) {
e1444b5a 2488 case IB_CM_LAP_UNINIT:
a977049d
HR		 2489 case IB_CM_LAP_IDLE:
2490 break;
2491 case IB_CM_MRA_LAP_SENT:
2492 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2493 goto unlock;
2494
2495 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2496 CM_MSG_RESPONSE_OTHER,
2497 cm_id_priv->service_timeout,
2498 cm_id_priv->private_data,
2499 cm_id_priv->private_data_len);
2500 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2501
34816ad9 2502 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2503 cm_free_msg(msg);
2504 goto deref;
2505 default:
2506 goto unlock;
2507 }
2508
2509 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2510 cm_id_priv->tid = lap_msg->hdr.tid;
e1444b5a
SH		 2511 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2512 work->mad_recv_wc->recv_buf.grh,
2513 &cm_id_priv->av);
2514 cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av);
a977049d
HR		 2515 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2516 if (!ret)
2517 list_add_tail(&work->list, &cm_id_priv->work_list);
2518 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2519
2520 if (ret)
2521 cm_process_work(cm_id_priv, work);
2522 else
2523 cm_deref_id(cm_id_priv);
2524 return 0;
2525
2526unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2527deref: cm_deref_id(cm_id_priv);
2528 return -EINVAL;
2529}
2530
2531static void cm_format_apr(struct cm_apr_msg *apr_msg,
2532 struct cm_id_private *cm_id_priv,
2533 enum ib_cm_apr_status status,
2534 void *info,
2535 u8 info_length,
2536 const void *private_data,
2537 u8 private_data_len)
2538{
2539 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2540 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2541 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2542 apr_msg->ap_status = (u8) status;
2543
2544 if (info && info_length) {
2545 apr_msg->info_length = info_length;
2546 memcpy(apr_msg->info, info, info_length);
2547 }
2548
2549 if (private_data && private_data_len)
2550 memcpy(apr_msg->private_data, private_data, private_data_len);
2551}
2552
2553int ib_send_cm_apr(struct ib_cm_id *cm_id,
2554 enum ib_cm_apr_status status,
2555 void *info,
2556 u8 info_length,
2557 const void *private_data,
2558 u8 private_data_len)
2559{
2560 struct cm_id_private *cm_id_priv;
2561 struct ib_mad_send_buf *msg;
a977049d
HR		 2562 unsigned long flags;
2563 int ret;
2564
2565 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2566 (info && info_length > IB_CM_APR_INFO_LENGTH))
2567 return -EINVAL;
2568
2569 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2570 spin_lock_irqsave(&cm_id_priv->lock, flags);
2571 if (cm_id->state != IB_CM_ESTABLISHED ||
2572 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2573 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2574 ret = -EINVAL;
2575 goto out;
2576 }
2577
2578 ret = cm_alloc_msg(cm_id_priv, &msg);
2579 if (ret)
2580 goto out;
2581
2582 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2583 info, info_length, private_data, private_data_len);
34816ad9 2584 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2585 if (ret) {
2586 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2587 cm_free_msg(msg);
2588 return ret;
2589 }
2590
2591 cm_id->lap_state = IB_CM_LAP_IDLE;
2592out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2593 return ret;
2594}
2595EXPORT_SYMBOL(ib_send_cm_apr);
2596
2597static int cm_apr_handler(struct cm_work *work)
2598{
2599 struct cm_id_private *cm_id_priv;
2600 struct cm_apr_msg *apr_msg;
2601 unsigned long flags;
2602 int ret;
2603
2604 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2605 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2606 apr_msg->local_comm_id);
2607 if (!cm_id_priv)
2608 return -EINVAL; /* Unmatched reply. */
2609
2610 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2611 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2612 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2613 work->cm_event.private_data = &apr_msg->private_data;
2614
2615 spin_lock_irqsave(&cm_id_priv->lock, flags);
2616 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2617 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2618 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2619 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2620 goto out;
2621 }
2622 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
34816ad9 2623 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2624 cm_id_priv->msg = NULL;
2625
2626 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2627 if (!ret)
2628 list_add_tail(&work->list, &cm_id_priv->work_list);
2629 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2630
2631 if (ret)
2632 cm_process_work(cm_id_priv, work);
2633 else
2634 cm_deref_id(cm_id_priv);
2635 return 0;
2636out:
2637 cm_deref_id(cm_id_priv);
2638 return -EINVAL;
2639}
2640
2641static int cm_timewait_handler(struct cm_work *work)
2642{
2643 struct cm_timewait_info *timewait_info;
2644 struct cm_id_private *cm_id_priv;
a977049d
HR		 2645 int ret;
2646
2647 timewait_info = (struct cm_timewait_info *)work;
8575329d
SH		 2648 spin_lock_irq(&cm.lock);
2649 list_del(&timewait_info->list);
2650 spin_unlock_irq(&cm.lock);
a977049d
HR		 2651
2652 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2653 timewait_info->work.remote_id);
2654 if (!cm_id_priv)
2655 return -EINVAL;
2656
8575329d 2657 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2658 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2659 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
8575329d 2660 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2661 goto out;
2662 }
2663 cm_id_priv->id.state = IB_CM_IDLE;
2664 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2665 if (!ret)
2666 list_add_tail(&work->list, &cm_id_priv->work_list);
8575329d 2667 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2668
2669 if (ret)
2670 cm_process_work(cm_id_priv, work);
2671 else
2672 cm_deref_id(cm_id_priv);
2673 return 0;
2674out:
2675 cm_deref_id(cm_id_priv);
2676 return -EINVAL;
2677}
2678
2679static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2680 struct cm_id_private *cm_id_priv,
2681 struct ib_cm_sidr_req_param *param)
2682{
2683 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2684 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2685 sidr_req_msg->request_id = cm_id_priv->id.local_id;
75af9088 2686 sidr_req_msg->pkey = cpu_to_be16(param->path->pkey);
a977049d
HR		 2687 sidr_req_msg->service_id = param->service_id;
2688
2689 if (param->private_data && param->private_data_len)
2690 memcpy(sidr_req_msg->private_data, param->private_data,
2691 param->private_data_len);
2692}
2693
2694int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2695 struct ib_cm_sidr_req_param *param)
2696{
2697 struct cm_id_private *cm_id_priv;
2698 struct ib_mad_send_buf *msg;
a977049d
HR		 2699 unsigned long flags;
2700 int ret;
2701
2702 if (!param->path || (param->private_data &&
2703 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2704 return -EINVAL;
2705
2706 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2707 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2708 if (ret)
2709 goto out;
2710
2711 cm_id->service_id = param->service_id;
97f52eb4 2712 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2713 cm_id_priv->timeout_ms = param->timeout_ms;
2714 cm_id_priv->max_cm_retries = param->max_cm_retries;
2715 ret = cm_alloc_msg(cm_id_priv, &msg);
2716 if (ret)
2717 goto out;
2718
2719 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2720 param);
34816ad9 2721 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2722 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2723
2724 spin_lock_irqsave(&cm_id_priv->lock, flags);
2725 if (cm_id->state == IB_CM_IDLE)
34816ad9 2726 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2727 else
2728 ret = -EINVAL;
2729
2730 if (ret) {
2731 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2732 cm_free_msg(msg);
2733 goto out;
2734 }
2735 cm_id->state = IB_CM_SIDR_REQ_SENT;
2736 cm_id_priv->msg = msg;
2737 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2738out:
2739 return ret;
2740}
2741EXPORT_SYMBOL(ib_send_cm_sidr_req);
2742
2743static void cm_format_sidr_req_event(struct cm_work *work,
2744 struct ib_cm_id *listen_id)
2745{
2746 struct cm_sidr_req_msg *sidr_req_msg;
2747 struct ib_cm_sidr_req_event_param *param;
2748
2749 sidr_req_msg = (struct cm_sidr_req_msg *)
2750 work->mad_recv_wc->recv_buf.mad;
2751 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 2752 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 2753 param->listen_id = listen_id;
a977049d
HR		 2754 param->port = work->port->port_num;
2755 work->cm_event.private_data = &sidr_req_msg->private_data;
2756}
2757
2758static int cm_sidr_req_handler(struct cm_work *work)
2759{
2760 struct ib_cm_id *cm_id;
2761 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2762 struct cm_sidr_req_msg *sidr_req_msg;
2763 struct ib_wc *wc;
2764 unsigned long flags;
2765
07d357d0 2766 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 2767 if (IS_ERR(cm_id))
2768 return PTR_ERR(cm_id);
2769 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2770
2771 /* Record SGID/SLID and request ID for lookup. */
2772 sidr_req_msg = (struct cm_sidr_req_msg *)
2773 work->mad_recv_wc->recv_buf.mad;
2774 wc = work->mad_recv_wc->wc;
97f52eb4 2775 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 2776 cm_id_priv->av.dgid.global.interface_id = 0;
2777 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 2778 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 2779 &cm_id_priv->av);
2780 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2781 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2782 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2783 atomic_inc(&cm_id_priv->work_count);
2784
2785 spin_lock_irqsave(&cm.lock, flags);
2786 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2787 if (cur_cm_id_priv) {
2788 spin_unlock_irqrestore(&cm.lock, flags);
2789 goto out; /* Duplicate message. */
2790 }
07d357d0 2791 cur_cm_id_priv = cm_find_listen(cm_id->device,
6e61d04f
SH		 2792 sidr_req_msg->service_id,
2793 sidr_req_msg->private_data);
a977049d
HR		 2794 if (!cur_cm_id_priv) {
2795 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2796 spin_unlock_irqrestore(&cm.lock, flags);
2797 /* todo: reply with no match */
2798 goto out; /* No match. */
2799 }
2800 atomic_inc(&cur_cm_id_priv->refcount);
2801 spin_unlock_irqrestore(&cm.lock, flags);
2802
2803 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2804 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2805 cm_id_priv->id.service_id = sidr_req_msg->service_id;
97f52eb4 2806 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2807
2808 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2809 cm_process_work(cm_id_priv, work);
2810 cm_deref_id(cur_cm_id_priv);
2811 return 0;
2812out:
2813 ib_destroy_cm_id(&cm_id_priv->id);
2814 return -EINVAL;
2815}
2816
2817static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2818 struct cm_id_private *cm_id_priv,
2819 struct ib_cm_sidr_rep_param *param)
2820{
2821 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2822 cm_id_priv->tid);
2823 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2824 sidr_rep_msg->status = param->status;
2825 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2826 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2827 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2828
2829 if (param->info && param->info_length)
2830 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2831
2832 if (param->private_data && param->private_data_len)
2833 memcpy(sidr_rep_msg->private_data, param->private_data,
2834 param->private_data_len);
2835}
2836
2837int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2838 struct ib_cm_sidr_rep_param *param)
2839{
2840 struct cm_id_private *cm_id_priv;
2841 struct ib_mad_send_buf *msg;
a977049d
HR		 2842 unsigned long flags;
2843 int ret;
2844
2845 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2846 (param->private_data &&
2847 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2848 return -EINVAL;
2849
2850 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2851 spin_lock_irqsave(&cm_id_priv->lock, flags);
2852 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2853 ret = -EINVAL;
2854 goto error;
2855 }
2856
2857 ret = cm_alloc_msg(cm_id_priv, &msg);
2858 if (ret)
2859 goto error;
2860
2861 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2862 param);
34816ad9 2863 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2864 if (ret) {
2865 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2866 cm_free_msg(msg);
2867 return ret;
2868 }
2869 cm_id->state = IB_CM_IDLE;
2870 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2871
2872 spin_lock_irqsave(&cm.lock, flags);
2873 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2874 spin_unlock_irqrestore(&cm.lock, flags);
2875 return 0;
2876
2877error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2878 return ret;
2879}
2880EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2881
2882static void cm_format_sidr_rep_event(struct cm_work *work)
2883{
2884 struct cm_sidr_rep_msg *sidr_rep_msg;
2885 struct ib_cm_sidr_rep_event_param *param;
2886
2887 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2888 work->mad_recv_wc->recv_buf.mad;
2889 param = &work->cm_event.param.sidr_rep_rcvd;
2890 param->status = sidr_rep_msg->status;
2891 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2892 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2893 param->info = &sidr_rep_msg->info;
2894 param->info_len = sidr_rep_msg->info_length;
2895 work->cm_event.private_data = &sidr_rep_msg->private_data;
2896}
2897
2898static int cm_sidr_rep_handler(struct cm_work *work)
2899{
2900 struct cm_sidr_rep_msg *sidr_rep_msg;
2901 struct cm_id_private *cm_id_priv;
2902 unsigned long flags;
2903
2904 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2905 work->mad_recv_wc->recv_buf.mad;
2906 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2907 if (!cm_id_priv)
2908 return -EINVAL; /* Unmatched reply. */
2909
2910 spin_lock_irqsave(&cm_id_priv->lock, flags);
2911 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2912 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2913 goto out;
2914 }
2915 cm_id_priv->id.state = IB_CM_IDLE;
34816ad9 2916 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2917 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2918
2919 cm_format_sidr_rep_event(work);
2920 cm_process_work(cm_id_priv, work);
2921 return 0;
2922out:
2923 cm_deref_id(cm_id_priv);
2924 return -EINVAL;
2925}
2926
2927static void cm_process_send_error(struct ib_mad_send_buf *msg,
2928 enum ib_wc_status wc_status)
2929{
2930 struct cm_id_private *cm_id_priv;
2931 struct ib_cm_event cm_event;
2932 enum ib_cm_state state;
2933 unsigned long flags;
2934 int ret;
2935
2936 memset(&cm_event, 0, sizeof cm_event);
2937 cm_id_priv = msg->context[0];
2938
2939 /* Discard old sends or ones without a response. */
2940 spin_lock_irqsave(&cm_id_priv->lock, flags);
2941 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2942 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2943 goto discard;
2944
2945 switch (state) {
2946 case IB_CM_REQ_SENT:
2947 case IB_CM_MRA_REQ_RCVD:
2948 cm_reset_to_idle(cm_id_priv);
2949 cm_event.event = IB_CM_REQ_ERROR;
2950 break;
2951 case IB_CM_REP_SENT:
2952 case IB_CM_MRA_REP_RCVD:
2953 cm_reset_to_idle(cm_id_priv);
2954 cm_event.event = IB_CM_REP_ERROR;
2955 break;
2956 case IB_CM_DREQ_SENT:
2957 cm_enter_timewait(cm_id_priv);
2958 cm_event.event = IB_CM_DREQ_ERROR;
2959 break;
2960 case IB_CM_SIDR_REQ_SENT:
2961 cm_id_priv->id.state = IB_CM_IDLE;
2962 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2963 break;
2964 default:
2965 goto discard;
2966 }
2967 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2968 cm_event.param.send_status = wc_status;
2969
2970 /* No other events can occur on the cm_id at this point. */
2971 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2972 cm_free_msg(msg);
2973 if (ret)
2974 ib_destroy_cm_id(&cm_id_priv->id);
2975 return;
2976discard:
2977 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2978 cm_free_msg(msg);
2979}
2980
2981static void cm_send_handler(struct ib_mad_agent *mad_agent,
2982 struct ib_mad_send_wc *mad_send_wc)
2983{
34816ad9 2984 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
a977049d
HR		 2985
2986 switch (mad_send_wc->status) {
2987 case IB_WC_SUCCESS:
2988 case IB_WC_WR_FLUSH_ERR:
2989 cm_free_msg(msg);
2990 break;
2991 default:
2992 if (msg->context[0] && msg->context[1])
2993 cm_process_send_error(msg, mad_send_wc->status);
2994 else
2995 cm_free_msg(msg);
2996 break;
2997 }
2998}
2999
c4028958 3000static void cm_work_handler(struct work_struct *_work)
a977049d 3001{
c4028958 3002 struct cm_work *work = container_of(_work, struct cm_work, work.work);
a977049d
HR		 3003 int ret;
3004
3005 switch (work->cm_event.event) {
3006 case IB_CM_REQ_RECEIVED:
3007 ret = cm_req_handler(work);
3008 break;
3009 case IB_CM_MRA_RECEIVED:
3010 ret = cm_mra_handler(work);
3011 break;
3012 case IB_CM_REJ_RECEIVED:
3013 ret = cm_rej_handler(work);
3014 break;
3015 case IB_CM_REP_RECEIVED:
3016 ret = cm_rep_handler(work);
3017 break;
3018 case IB_CM_RTU_RECEIVED:
3019 ret = cm_rtu_handler(work);
3020 break;
3021 case IB_CM_USER_ESTABLISHED:
3022 ret = cm_establish_handler(work);
3023 break;
3024 case IB_CM_DREQ_RECEIVED:
3025 ret = cm_dreq_handler(work);
3026 break;
3027 case IB_CM_DREP_RECEIVED:
3028 ret = cm_drep_handler(work);
3029 break;
3030 case IB_CM_SIDR_REQ_RECEIVED:
3031 ret = cm_sidr_req_handler(work);
3032 break;
3033 case IB_CM_SIDR_REP_RECEIVED:
3034 ret = cm_sidr_rep_handler(work);
3035 break;
3036 case IB_CM_LAP_RECEIVED:
3037 ret = cm_lap_handler(work);
3038 break;
3039 case IB_CM_APR_RECEIVED:
3040 ret = cm_apr_handler(work);
3041 break;
3042 case IB_CM_TIMEWAIT_EXIT:
3043 ret = cm_timewait_handler(work);
3044 break;
3045 default:
3046 ret = -EINVAL;
3047 break;
3048 }
3049 if (ret)
3050 cm_free_work(work);
3051}
3052
e1444b5a 3053static int cm_establish(struct ib_cm_id *cm_id)
a977049d
HR		 3054{
3055 struct cm_id_private *cm_id_priv;
3056 struct cm_work *work;
3057 unsigned long flags;
3058 int ret = 0;
3059
3060 work = kmalloc(sizeof *work, GFP_ATOMIC);
3061 if (!work)
3062 return -ENOMEM;
3063
3064 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3065 spin_lock_irqsave(&cm_id_priv->lock, flags);
3066 switch (cm_id->state)
3067 {
3068 case IB_CM_REP_SENT:
3069 case IB_CM_MRA_REP_RCVD:
3070 cm_id->state = IB_CM_ESTABLISHED;
3071 break;
3072 case IB_CM_ESTABLISHED:
3073 ret = -EISCONN;
3074 break;
3075 default:
3076 ret = -EINVAL;
3077 break;
3078 }
3079 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3080
3081 if (ret) {
3082 kfree(work);
3083 goto out;
3084 }
3085
3086 /*
3087 * The CM worker thread may try to destroy the cm_id before it
3088 * can execute this work item. To prevent potential deadlock,
3089 * we need to find the cm_id once we're in the context of the
3090 * worker thread, rather than holding a reference on it.
3091 */
c4028958 3092 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 3093 work->local_id = cm_id->local_id;
3094 work->remote_id = cm_id->remote_id;
3095 work->mad_recv_wc = NULL;
3096 work->cm_event.event = IB_CM_USER_ESTABLISHED;
c4028958 3097 queue_delayed_work(cm.wq, &work->work, 0);
a977049d
HR		 3098out:
3099 return ret;
3100}
e1444b5a
SH		 3101
3102static int cm_migrate(struct ib_cm_id *cm_id)
3103{
3104 struct cm_id_private *cm_id_priv;
3105 unsigned long flags;
3106 int ret = 0;
3107
3108 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3109 spin_lock_irqsave(&cm_id_priv->lock, flags);
3110 if (cm_id->state == IB_CM_ESTABLISHED &&
3111 (cm_id->lap_state == IB_CM_LAP_UNINIT ||
3112 cm_id->lap_state == IB_CM_LAP_IDLE)) {
3113 cm_id->lap_state = IB_CM_LAP_IDLE;
3114 cm_id_priv->av = cm_id_priv->alt_av;
3115 } else
3116 ret = -EINVAL;
3117 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3118
3119 return ret;
3120}
3121
3122int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
3123{
3124 int ret;
3125
3126 switch (event) {
3127 case IB_EVENT_COMM_EST:
3128 ret = cm_establish(cm_id);
3129 break;
3130 case IB_EVENT_PATH_MIG:
3131 ret = cm_migrate(cm_id);
3132 break;
3133 default:
3134 ret = -EINVAL;
3135 }
3136 return ret;
3137}
3138EXPORT_SYMBOL(ib_cm_notify);
a977049d
HR		 3139
3140static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3141 struct ib_mad_recv_wc *mad_recv_wc)
3142{
3143 struct cm_work *work;
3144 enum ib_cm_event_type event;
3145 int paths = 0;
3146
3147 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3148 case CM_REQ_ATTR_ID:
3149 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3150 alt_local_lid != 0);
3151 event = IB_CM_REQ_RECEIVED;
3152 break;
3153 case CM_MRA_ATTR_ID:
3154 event = IB_CM_MRA_RECEIVED;
3155 break;
3156 case CM_REJ_ATTR_ID:
3157 event = IB_CM_REJ_RECEIVED;
3158 break;
3159 case CM_REP_ATTR_ID:
3160 event = IB_CM_REP_RECEIVED;
3161 break;
3162 case CM_RTU_ATTR_ID:
3163 event = IB_CM_RTU_RECEIVED;
3164 break;
3165 case CM_DREQ_ATTR_ID:
3166 event = IB_CM_DREQ_RECEIVED;
3167 break;
3168 case CM_DREP_ATTR_ID:
3169 event = IB_CM_DREP_RECEIVED;
3170 break;
3171 case CM_SIDR_REQ_ATTR_ID:
3172 event = IB_CM_SIDR_REQ_RECEIVED;
3173 break;
3174 case CM_SIDR_REP_ATTR_ID:
3175 event = IB_CM_SIDR_REP_RECEIVED;
3176 break;
3177 case CM_LAP_ATTR_ID:
3178 paths = 1;
3179 event = IB_CM_LAP_RECEIVED;
3180 break;
3181 case CM_APR_ATTR_ID:
3182 event = IB_CM_APR_RECEIVED;
3183 break;
3184 default:
3185 ib_free_recv_mad(mad_recv_wc);
3186 return;
3187 }
3188
3189 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3190 GFP_KERNEL);
3191 if (!work) {
3192 ib_free_recv_mad(mad_recv_wc);
3193 return;
3194 }
3195
c4028958 3196 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 3197 work->cm_event.event = event;
3198 work->mad_recv_wc = mad_recv_wc;
3199 work->port = (struct cm_port *)mad_agent->context;
c4028958 3200 queue_delayed_work(cm.wq, &work->work, 0);
a977049d
HR		 3201}
3202
3203static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3204 struct ib_qp_attr *qp_attr,
3205 int *qp_attr_mask)
3206{
3207 unsigned long flags;
3208 int ret;
3209
3210 spin_lock_irqsave(&cm_id_priv->lock, flags);
3211 switch (cm_id_priv->id.state) {
3212 case IB_CM_REQ_SENT:
3213 case IB_CM_MRA_REQ_RCVD:
3214 case IB_CM_REQ_RCVD:
3215 case IB_CM_MRA_REQ_SENT:
3216 case IB_CM_REP_RCVD:
3217 case IB_CM_MRA_REP_SENT:
3218 case IB_CM_REP_SENT:
3219 case IB_CM_MRA_REP_RCVD:
3220 case IB_CM_ESTABLISHED:
3221 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3222 IB_QP_PKEY_INDEX | IB_QP_PORT;
e31353ea 3223 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
a977049d 3224 if (cm_id_priv->responder_resources)
c1f250c0
SH		 3225 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3226 IB_ACCESS_REMOTE_ATOMIC;
a977049d
HR		 3227 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3228 qp_attr->port_num = cm_id_priv->av.port->port_num;
3229 ret = 0;
3230 break;
3231 default:
3232 ret = -EINVAL;
3233 break;
3234 }
3235 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3236 return ret;
3237}
3238
3239static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3240 struct ib_qp_attr *qp_attr,
3241 int *qp_attr_mask)
3242{
3243 unsigned long flags;
3244 int ret;
3245
3246 spin_lock_irqsave(&cm_id_priv->lock, flags);
3247 switch (cm_id_priv->id.state) {
3248 case IB_CM_REQ_RCVD:
3249 case IB_CM_MRA_REQ_SENT:
3250 case IB_CM_REP_RCVD:
3251 case IB_CM_MRA_REP_SENT:
3252 case IB_CM_REP_SENT:
3253 case IB_CM_MRA_REP_RCVD:
3254 case IB_CM_ESTABLISHED:
3255 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 3256 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d
HR		 3257 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3258 qp_attr->path_mtu = cm_id_priv->path_mtu;
3259 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3260 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
ae7971a7
SH		 3261 if (cm_id_priv->qp_type == IB_QPT_RC) {
3262 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3263 IB_QP_MIN_RNR_TIMER;
3264 qp_attr->max_dest_rd_atomic =
3265 cm_id_priv->responder_resources;
3266 qp_attr->min_rnr_timer = 0;
3267 }
a977049d
HR		 3268 if (cm_id_priv->alt_av.ah_attr.dlid) {
3269 *qp_attr_mask |= IB_QP_ALT_PATH;
0d8fdfd7 3270 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
e1444b5a
SH		 3271 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
3272 qp_attr->alt_timeout =
3273 cm_id_priv->alt_av.packet_life_time + 1;
a977049d
HR		 3274 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3275 }
3276 ret = 0;
3277 break;
3278 default:
3279 ret = -EINVAL;
3280 break;
3281 }
3282 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3283 return ret;
3284}
3285
3286static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3287 struct ib_qp_attr *qp_attr,
3288 int *qp_attr_mask)
3289{
3290 unsigned long flags;
3291 int ret;
3292
3293 spin_lock_irqsave(&cm_id_priv->lock, flags);
3294 switch (cm_id_priv->id.state) {
0fe313b0
SH		 3295 /* Allow transition to RTS before sending REP */
3296 case IB_CM_REQ_RCVD:
3297 case IB_CM_MRA_REQ_SENT:
3298
a977049d
HR		 3299 case IB_CM_REP_RCVD:
3300 case IB_CM_MRA_REP_SENT:
3301 case IB_CM_REP_SENT:
3302 case IB_CM_MRA_REP_RCVD:
3303 case IB_CM_ESTABLISHED:
e1444b5a
SH		 3304 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
3305 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
3306 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
3307 if (cm_id_priv->qp_type == IB_QPT_RC) {
3308 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3309 IB_QP_RNR_RETRY |
3310 IB_QP_MAX_QP_RD_ATOMIC;
3311 qp_attr->timeout =
3312 cm_id_priv->av.packet_life_time + 1;
3313 qp_attr->retry_cnt = cm_id_priv->retry_count;
3314 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3315 qp_attr->max_rd_atomic =
3316 cm_id_priv->initiator_depth;
3317 }
3318 if (cm_id_priv->alt_av.ah_attr.dlid) {
3319 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3320 qp_attr->path_mig_state = IB_MIG_REARM;
3321 }
3322 } else {
3323 *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
3324 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3325 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
3326 qp_attr->alt_timeout =
3327 cm_id_priv->alt_av.packet_life_time + 1;
3328 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
a977049d
HR		 3329 qp_attr->path_mig_state = IB_MIG_REARM;
3330 }
3331 ret = 0;
3332 break;
3333 default:
3334 ret = -EINVAL;
3335 break;
3336 }
3337 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3338 return ret;
3339}
3340
3341int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3342 struct ib_qp_attr *qp_attr,
3343 int *qp_attr_mask)
3344{
3345 struct cm_id_private *cm_id_priv;
3346 int ret;
3347
3348 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3349 switch (qp_attr->qp_state) {
3350 case IB_QPS_INIT:
3351 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3352 break;
3353 case IB_QPS_RTR:
3354 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3355 break;
3356 case IB_QPS_RTS:
3357 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3358 break;
3359 default:
3360 ret = -EINVAL;
3361 break;
3362 }
3363 return ret;
3364}
3365EXPORT_SYMBOL(ib_cm_init_qp_attr);
3366
a977049d
HR		 3367static void cm_add_one(struct ib_device *device)
3368{
3369 struct cm_device *cm_dev;
3370 struct cm_port *port;
3371 struct ib_mad_reg_req reg_req = {
3372 .mgmt_class = IB_MGMT_CLASS_CM,
3373 .mgmt_class_version = IB_CM_CLASS_VERSION
3374 };
3375 struct ib_port_modify port_modify = {
3376 .set_port_cap_mask = IB_PORT_CM_SUP
3377 };
3378 unsigned long flags;
3379 int ret;
3380 u8 i;
3381
07ebafba
TT		 3382 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
3383 return;
3384
a977049d
HR		 3385 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3386 device->phys_port_cnt, GFP_KERNEL);
3387 if (!cm_dev)
3388 return;
3389
3390 cm_dev->device = device;
a977049d
HR		 3391
3392 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3393 for (i = 1; i <= device->phys_port_cnt; i++) {
3394 port = &cm_dev->port[i-1];
3395 port->cm_dev = cm_dev;
3396 port->port_num = i;
3397 port->mad_agent = ib_register_mad_agent(device, i,
3398 IB_QPT_GSI,
3399 &reg_req,
3400 0,
3401 cm_send_handler,
3402 cm_recv_handler,
3403 port);
3404 if (IS_ERR(port->mad_agent))
cf311cd4 3405 goto error1;
a977049d
HR		 3406
3407 ret = ib_modify_port(device, i, 0, &port_modify);
3408 if (ret)
cf311cd4 3409 goto error2;
a977049d
HR		 3410 }
3411 ib_set_client_data(device, &cm_client, cm_dev);
3412
3413 write_lock_irqsave(&cm.device_lock, flags);
3414 list_add_tail(&cm_dev->list, &cm.device_list);
3415 write_unlock_irqrestore(&cm.device_lock, flags);
3416 return;
3417
a977049d 3418error2:
cf311cd4
SH		 3419 ib_unregister_mad_agent(port->mad_agent);
3420error1:
a977049d
HR		 3421 port_modify.set_port_cap_mask = 0;
3422 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3423 while (--i) {
3424 port = &cm_dev->port[i-1];
3425 ib_modify_port(device, port->port_num, 0, &port_modify);
3426 ib_unregister_mad_agent(port->mad_agent);
3427 }
a977049d
HR		 3428 kfree(cm_dev);
3429}
3430
3431static void cm_remove_one(struct ib_device *device)
3432{
3433 struct cm_device *cm_dev;
3434 struct cm_port *port;
3435 struct ib_port_modify port_modify = {
3436 .clr_port_cap_mask = IB_PORT_CM_SUP
3437 };
3438 unsigned long flags;
3439 int i;
3440
3441 cm_dev = ib_get_client_data(device, &cm_client);
3442 if (!cm_dev)
3443 return;
3444
3445 write_lock_irqsave(&cm.device_lock, flags);
3446 list_del(&cm_dev->list);
3447 write_unlock_irqrestore(&cm.device_lock, flags);
3448
3449 for (i = 1; i <= device->phys_port_cnt; i++) {
3450 port = &cm_dev->port[i-1];
3451 ib_modify_port(device, port->port_num, 0, &port_modify);
3452 ib_unregister_mad_agent(port->mad_agent);
3453 }
3454 kfree(cm_dev);
3455}
3456
3457static int __init ib_cm_init(void)
3458{
3459 int ret;
3460
3461 memset(&cm, 0, sizeof cm);
3462 INIT_LIST_HEAD(&cm.device_list);
3463 rwlock_init(&cm.device_lock);
3464 spin_lock_init(&cm.lock);
3465 cm.listen_service_table = RB_ROOT;
3466 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3467 cm.remote_id_table = RB_ROOT;
3468 cm.remote_qp_table = RB_ROOT;
3469 cm.remote_sidr_table = RB_ROOT;
3470 idr_init(&cm.local_id_table);
f06d2653 3471 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
a977049d 3472 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
8575329d 3473 INIT_LIST_HEAD(&cm.timewait_list);
a977049d
HR		 3474
3475 cm.wq = create_workqueue("ib_cm");
3476 if (!cm.wq)
3477 return -ENOMEM;
3478
3479 ret = ib_register_client(&cm_client);
3480 if (ret)
3481 goto error;
3482
3483 return 0;
3484error:
3485 destroy_workqueue(cm.wq);
3486 return ret;
3487}
3488
3489static void __exit ib_cm_cleanup(void)
3490{
8575329d
SH		 3491 struct cm_timewait_info *timewait_info, *tmp;
3492
3493 spin_lock_irq(&cm.lock);
3494 list_for_each_entry(timewait_info, &cm.timewait_list, list)
3495 cancel_delayed_work(&timewait_info->work.work);
3496 spin_unlock_irq(&cm.lock);
3497
a977049d 3498 destroy_workqueue(cm.wq);
8575329d
SH		 3499
3500 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
3501 list_del(&timewait_info->list);
3502 kfree(timewait_info);
3503 }
3504
a977049d 3505 ib_unregister_client(&cm_client);
5d7edb3c 3506 idr_destroy(&cm.local_id_table);
a977049d
HR		 3507}
3508
3509module_init(ib_cm_init);
3510module_exit(ib_cm_cleanup);
3511
Linux kernel - Deliverables
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