projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
IB/mthca: Query port fix
[deliverable/linux.git] / drivers / infiniband / core / cm.c
CommitLineData
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>
43#include <linux/pci.h>
f06d2653 44#include <linux/random.h>
a977049d
HR		 45#include <linux/rbtree.h>
46#include <linux/spinlock.h>
47#include <linux/workqueue.h>
48
a4d61e84
RD		 49#include <rdma/ib_cache.h>
50#include <rdma/ib_cm.h>
a977049d
HR		 51#include "cm_msgs.h"
52
53MODULE_AUTHOR("Sean Hefty");
54MODULE_DESCRIPTION("InfiniBand CM");
55MODULE_LICENSE("Dual BSD/GPL");
56
57static void cm_add_one(struct ib_device *device);
58static void cm_remove_one(struct ib_device *device);
59
60static struct ib_client cm_client = {
61 .name = "cm",
62 .add = cm_add_one,
63 .remove = cm_remove_one
64};
65
66static struct ib_cm {
67 spinlock_t lock;
68 struct list_head device_list;
69 rwlock_t device_lock;
70 struct rb_root listen_service_table;
71 u64 listen_service_id;
72 /* struct rb_root peer_service_table; todo: fix peer to peer */
73 struct rb_root remote_qp_table;
74 struct rb_root remote_id_table;
75 struct rb_root remote_sidr_table;
76 struct idr local_id_table;
f06d2653 77 __be32 random_id_operand;
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;
97f52eb4 90 __be64 ca_guid;
a977049d
HR		 91 struct cm_port port[0];
92};
93
94struct cm_av {
95 struct cm_port *port;
96 union ib_gid dgid;
97 struct ib_ah_attr ah_attr;
98 u16 pkey_index;
99 u8 packet_life_time;
100};
101
102struct cm_work {
103 struct work_struct work;
104 struct list_head list;
105 struct cm_port *port;
106 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
97f52eb4
SH		 107 __be32 local_id; /* Established / timewait */
108 __be32 remote_id;
a977049d
HR		 109 struct ib_cm_event cm_event;
110 struct ib_sa_path_rec path[0];
111};
112
113struct cm_timewait_info {
114 struct cm_work work; /* Must be first. */
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;
148 u8 private_data_len;
149 u8 max_cm_retries;
150 u8 peer_to_peer;
151 u8 responder_resources;
152 u8 initiator_depth;
153 u8 local_ack_timeout;
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
162static void cm_work_handler(void *data);
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
241 data = kmalloc(private_data_len, GFP_KERNEL);
242 if (!data)
243 return ERR_PTR(-ENOMEM);
244
245 memcpy(data, private_data, private_data_len);
246 return data;
247}
248
249static void cm_set_private_data(struct cm_id_private *cm_id_priv,
250 void *private_data, u8 private_data_len)
251{
252 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
253 kfree(cm_id_priv->private_data);
254
255 cm_id_priv->private_data = private_data;
256 cm_id_priv->private_data_len = private_data_len;
257}
258
ca222c6b
SH		 259static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
260 struct ib_grh *grh, struct cm_av *av)
a977049d
HR		 261{
262 av->port = port;
263 av->pkey_index = wc->pkey_index;
ca222c6b
SH		 264 ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc,
265 grh, &av->ah_attr);
a977049d
HR		 266}
267
268static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
269{
270 struct cm_device *cm_dev;
271 struct cm_port *port = NULL;
272 unsigned long flags;
273 int ret;
274 u8 p;
275
276 read_lock_irqsave(&cm.device_lock, flags);
277 list_for_each_entry(cm_dev, &cm.device_list, list) {
278 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
279 &p, NULL)) {
280 port = &cm_dev->port[p-1];
281 break;
282 }
283 }
284 read_unlock_irqrestore(&cm.device_lock, flags);
285
286 if (!port)
287 return -EINVAL;
288
289 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
290 be16_to_cpu(path->pkey), &av->pkey_index);
291 if (ret)
292 return ret;
293
294 av->port = port;
ca222c6b
SH		 295 ib_init_ah_from_path(cm_dev->device, port->port_num, path,
296 &av->ah_attr);
a977049d
HR		 297 av->packet_life_time = path->packet_life_time;
298 return 0;
299}
300
301static int cm_alloc_id(struct cm_id_private *cm_id_priv)
302{
303 unsigned long flags;
f06d2653 304 int ret, id;
de1bb1a6 305 static int next_id;
a977049d
HR		 306
307 do {
308 spin_lock_irqsave(&cm.lock, flags);
f06d2653
SH		 309 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv,
310 next_id++, &id);
a977049d
HR		 311 spin_unlock_irqrestore(&cm.lock, flags);
312 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
f06d2653
SH		 313
314 cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand);
a977049d
HR		 315 return ret;
316}
317
97f52eb4 318static void cm_free_id(__be32 local_id)
a977049d
HR		 319{
320 unsigned long flags;
321
322 spin_lock_irqsave(&cm.lock, flags);
f06d2653
SH		 323 idr_remove(&cm.local_id_table,
324 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 325 spin_unlock_irqrestore(&cm.lock, flags);
326}
327
97f52eb4 328static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 329{
330 struct cm_id_private *cm_id_priv;
331
f06d2653
SH		 332 cm_id_priv = idr_find(&cm.local_id_table,
333 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 334 if (cm_id_priv) {
335 if (cm_id_priv->id.remote_id == remote_id)
336 atomic_inc(&cm_id_priv->refcount);
337 else
338 cm_id_priv = NULL;
339 }
340
341 return cm_id_priv;
342}
343
97f52eb4 344static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 345{
346 struct cm_id_private *cm_id_priv;
347 unsigned long flags;
348
349 spin_lock_irqsave(&cm.lock, flags);
350 cm_id_priv = cm_get_id(local_id, remote_id);
351 spin_unlock_irqrestore(&cm.lock, flags);
352
353 return cm_id_priv;
354}
355
6e61d04f
SH		 356static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
357{
358 int i;
359
360 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
361 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
362 ((unsigned long *) mask)[i];
363}
364
365static int cm_compare_data(struct ib_cm_compare_data *src_data,
366 struct ib_cm_compare_data *dst_data)
367{
368 u8 src[IB_CM_COMPARE_SIZE];
369 u8 dst[IB_CM_COMPARE_SIZE];
370
371 if (!src_data || !dst_data)
372 return 0;
373
374 cm_mask_copy(src, src_data->data, dst_data->mask);
375 cm_mask_copy(dst, dst_data->data, src_data->mask);
376 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
377}
378
379static int cm_compare_private_data(u8 *private_data,
380 struct ib_cm_compare_data *dst_data)
381{
382 u8 src[IB_CM_COMPARE_SIZE];
383
384 if (!dst_data)
385 return 0;
386
387 cm_mask_copy(src, private_data, dst_data->mask);
388 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
389}
390
a977049d
HR		 391static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
392{
393 struct rb_node **link = &cm.listen_service_table.rb_node;
394 struct rb_node *parent = NULL;
395 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 396 __be64 service_id = cm_id_priv->id.service_id;
397 __be64 service_mask = cm_id_priv->id.service_mask;
6e61d04f 398 int data_cmp;
a977049d
HR		 399
400 while (*link) {
401 parent = *link;
402 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
403 service_node);
6e61d04f
SH		 404 data_cmp = cm_compare_data(cm_id_priv->compare_data,
405 cur_cm_id_priv->compare_data);
a977049d 406 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0 407 (service_mask & cur_cm_id_priv->id.service_id) &&
6e61d04f
SH		 408 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
409 !data_cmp)
07d357d0
SH		 410 return cur_cm_id_priv;
411
412 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
413 link = &(*link)->rb_left;
414 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
415 link = &(*link)->rb_right;
416 else if (service_id < cur_cm_id_priv->id.service_id)
a977049d 417 link = &(*link)->rb_left;
6e61d04f
SH		 418 else if (service_id > cur_cm_id_priv->id.service_id)
419 link = &(*link)->rb_right;
420 else if (data_cmp < 0)
421 link = &(*link)->rb_left;
a977049d
HR		 422 else
423 link = &(*link)->rb_right;
424 }
425 rb_link_node(&cm_id_priv->service_node, parent, link);
426 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
427 return NULL;
428}
429
07d357d0 430static struct cm_id_private * cm_find_listen(struct ib_device *device,
6e61d04f
SH		 431 __be64 service_id,
432 u8 *private_data)
a977049d
HR		 433{
434 struct rb_node *node = cm.listen_service_table.rb_node;
435 struct cm_id_private *cm_id_priv;
6e61d04f 436 int data_cmp;
a977049d
HR		 437
438 while (node) {
439 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
6e61d04f
SH		 440 data_cmp = cm_compare_private_data(private_data,
441 cm_id_priv->compare_data);
a977049d 442 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0 443 cm_id_priv->id.service_id &&
6e61d04f 444 (cm_id_priv->id.device == device) && !data_cmp)
a977049d 445 return cm_id_priv;
07d357d0
SH		 446
447 if (device < cm_id_priv->id.device)
448 node = node->rb_left;
449 else if (device > cm_id_priv->id.device)
450 node = node->rb_right;
451 else if (service_id < cm_id_priv->id.service_id)
a977049d 452 node = node->rb_left;
6e61d04f
SH		 453 else if (service_id > cm_id_priv->id.service_id)
454 node = node->rb_right;
455 else if (data_cmp < 0)
456 node = node->rb_left;
a977049d
HR		 457 else
458 node = node->rb_right;
459 }
460 return NULL;
461}
462
463static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
464 *timewait_info)
465{
466 struct rb_node **link = &cm.remote_id_table.rb_node;
467 struct rb_node *parent = NULL;
468 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 469 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
470 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 471
472 while (*link) {
473 parent = *link;
474 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
475 remote_id_node);
476 if (remote_id < cur_timewait_info->work.remote_id)
477 link = &(*link)->rb_left;
478 else if (remote_id > cur_timewait_info->work.remote_id)
479 link = &(*link)->rb_right;
480 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
481 link = &(*link)->rb_left;
482 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
483 link = &(*link)->rb_right;
484 else
485 return cur_timewait_info;
486 }
487 timewait_info->inserted_remote_id = 1;
488 rb_link_node(&timewait_info->remote_id_node, parent, link);
489 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
490 return NULL;
491}
492
97f52eb4
SH		 493static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
494 __be32 remote_id)
a977049d
HR		 495{
496 struct rb_node *node = cm.remote_id_table.rb_node;
497 struct cm_timewait_info *timewait_info;
498
499 while (node) {
500 timewait_info = rb_entry(node, struct cm_timewait_info,
501 remote_id_node);
502 if (remote_id < timewait_info->work.remote_id)
503 node = node->rb_left;
504 else if (remote_id > timewait_info->work.remote_id)
505 node = node->rb_right;
506 else if (remote_ca_guid < timewait_info->remote_ca_guid)
507 node = node->rb_left;
508 else if (remote_ca_guid > timewait_info->remote_ca_guid)
509 node = node->rb_right;
510 else
511 return timewait_info;
512 }
513 return NULL;
514}
515
516static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
517 *timewait_info)
518{
519 struct rb_node **link = &cm.remote_qp_table.rb_node;
520 struct rb_node *parent = NULL;
521 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 522 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
523 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 524
525 while (*link) {
526 parent = *link;
527 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
528 remote_qp_node);
529 if (remote_qpn < cur_timewait_info->remote_qpn)
530 link = &(*link)->rb_left;
531 else if (remote_qpn > cur_timewait_info->remote_qpn)
532 link = &(*link)->rb_right;
533 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
534 link = &(*link)->rb_left;
535 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
536 link = &(*link)->rb_right;
537 else
538 return cur_timewait_info;
539 }
540 timewait_info->inserted_remote_qp = 1;
541 rb_link_node(&timewait_info->remote_qp_node, parent, link);
542 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
543 return NULL;
544}
545
546static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
547 *cm_id_priv)
548{
549 struct rb_node **link = &cm.remote_sidr_table.rb_node;
550 struct rb_node *parent = NULL;
551 struct cm_id_private *cur_cm_id_priv;
552 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 553 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 554
555 while (*link) {
556 parent = *link;
557 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
558 sidr_id_node);
559 if (remote_id < cur_cm_id_priv->id.remote_id)
560 link = &(*link)->rb_left;
561 else if (remote_id > cur_cm_id_priv->id.remote_id)
562 link = &(*link)->rb_right;
563 else {
564 int cmp;
565 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
566 sizeof *port_gid);
567 if (cmp < 0)
568 link = &(*link)->rb_left;
569 else if (cmp > 0)
570 link = &(*link)->rb_right;
571 else
572 return cur_cm_id_priv;
573 }
574 }
575 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
576 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
577 return NULL;
578}
579
580static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
581 enum ib_cm_sidr_status status)
582{
583 struct ib_cm_sidr_rep_param param;
584
585 memset(&param, 0, sizeof param);
586 param.status = status;
587 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
588}
589
07d357d0
SH		 590struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
591 ib_cm_handler cm_handler,
a977049d
HR		 592 void *context)
593{
594 struct cm_id_private *cm_id_priv;
595 int ret;
596
de6eb66b 597 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
a977049d
HR		 598 if (!cm_id_priv)
599 return ERR_PTR(-ENOMEM);
600
a977049d 601 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 602 cm_id_priv->id.device = device;
a977049d
HR		 603 cm_id_priv->id.cm_handler = cm_handler;
604 cm_id_priv->id.context = context;
354ba39c 605 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 606 ret = cm_alloc_id(cm_id_priv);
607 if (ret)
608 goto error;
609
610 spin_lock_init(&cm_id_priv->lock);
1b52fa98 611 init_completion(&cm_id_priv->comp);
a977049d
HR		 612 INIT_LIST_HEAD(&cm_id_priv->work_list);
613 atomic_set(&cm_id_priv->work_count, -1);
614 atomic_set(&cm_id_priv->refcount, 1);
615 return &cm_id_priv->id;
616
617error:
618 kfree(cm_id_priv);
619 return ERR_PTR(-ENOMEM);
620}
621EXPORT_SYMBOL(ib_create_cm_id);
622
623static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
624{
625 struct cm_work *work;
626
627 if (list_empty(&cm_id_priv->work_list))
628 return NULL;
629
630 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
631 list_del(&work->list);
632 return work;
633}
634
635static void cm_free_work(struct cm_work *work)
636{
637 if (work->mad_recv_wc)
638 ib_free_recv_mad(work->mad_recv_wc);
639 kfree(work);
640}
641
642static inline int cm_convert_to_ms(int iba_time)
643{
644 /* approximate conversion to ms from 4.096us x 2^iba_time */
645 return 1 << max(iba_time - 8, 0);
646}
647
648static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
649{
650 unsigned long flags;
651
652 if (!timewait_info->inserted_remote_id &&
653 !timewait_info->inserted_remote_qp)
654 return;
655
656 spin_lock_irqsave(&cm.lock, flags);
657 if (timewait_info->inserted_remote_id) {
658 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
659 timewait_info->inserted_remote_id = 0;
660 }
661
662 if (timewait_info->inserted_remote_qp) {
663 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
664 timewait_info->inserted_remote_qp = 0;
665 }
666 spin_unlock_irqrestore(&cm.lock, flags);
667}
668
97f52eb4 669static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 670{
671 struct cm_timewait_info *timewait_info;
672
de6eb66b 673 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
a977049d
HR		 674 if (!timewait_info)
675 return ERR_PTR(-ENOMEM);
a977049d
HR		 676
677 timewait_info->work.local_id = local_id;
678 INIT_WORK(&timewait_info->work.work, cm_work_handler,
679 &timewait_info->work);
680 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
681 return timewait_info;
682}
683
684static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
685{
686 int wait_time;
687
a70d0590
MT		 688 cm_cleanup_timewait(cm_id_priv->timewait_info);
689
a977049d
HR		 690 /*
691 * The cm_id could be destroyed by the user before we exit timewait.
692 * To protect against this, we search for the cm_id after exiting
693 * timewait before notifying the user that we've exited timewait.
694 */
695 cm_id_priv->id.state = IB_CM_TIMEWAIT;
696 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
697 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
698 msecs_to_jiffies(wait_time));
699 cm_id_priv->timewait_info = NULL;
700}
701
702static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
703{
704 cm_id_priv->id.state = IB_CM_IDLE;
705 if (cm_id_priv->timewait_info) {
706 cm_cleanup_timewait(cm_id_priv->timewait_info);
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,
742 &cm_id_priv->av.port->cm_dev->ca_guid,
743 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
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;
886 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
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;
ae7971a7 1011 cm_id_priv->qp_type = param->qp_type;
a977049d
HR		 1012
1013 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1014 if (ret)
1015 goto error1;
1016
1017 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1018 cm_format_req(req_msg, cm_id_priv, param);
1019 cm_id_priv->tid = req_msg->hdr.tid;
34816ad9 1020 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1021 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1022
1023 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1024 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
1025 cm_id_priv->local_ack_timeout =
1026 cm_req_get_primary_local_ack_timeout(req_msg);
1027
1028 spin_lock_irqsave(&cm_id_priv->lock, flags);
34816ad9 1029 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
a977049d
HR		 1030 if (ret) {
1031 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1032 goto error2;
1033 }
1034 BUG_ON(cm_id->state != IB_CM_IDLE);
1035 cm_id->state = IB_CM_REQ_SENT;
1036 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1037 return 0;
1038
1039error2: cm_free_msg(cm_id_priv->msg);
1040error1: kfree(cm_id_priv->timewait_info);
1041out: return ret;
1042}
1043EXPORT_SYMBOL(ib_send_cm_req);
1044
1045static int cm_issue_rej(struct cm_port *port,
1046 struct ib_mad_recv_wc *mad_recv_wc,
1047 enum ib_cm_rej_reason reason,
1048 enum cm_msg_response msg_rejected,
1049 void *ari, u8 ari_length)
1050{
1051 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1052 struct cm_rej_msg *rej_msg, *rcv_msg;
1053 int ret;
1054
1055 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1056 if (ret)
1057 return ret;
1058
1059 /* We just need common CM header information. Cast to any message. */
1060 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1061 rej_msg = (struct cm_rej_msg *) msg->mad;
1062
1063 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1064 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1065 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1066 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 1067 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1068
1069 if (ari && ari_length) {
1070 cm_rej_set_reject_info_len(rej_msg, ari_length);
1071 memcpy(rej_msg->ari, ari, ari_length);
1072 }
1073
34816ad9 1074 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1075 if (ret)
1076 cm_free_msg(msg);
1077
1078 return ret;
1079}
1080
97f52eb4
SH		 1081static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1082 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 1083{
1084 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1085 ((local_ca_guid == remote_ca_guid) &&
1086 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1087}
1088
858119e1 1089static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
a977049d
HR		 1090 struct ib_sa_path_rec *primary_path,
1091 struct ib_sa_path_rec *alt_path)
1092{
1093 memset(primary_path, 0, sizeof *primary_path);
1094 primary_path->dgid = req_msg->primary_local_gid;
1095 primary_path->sgid = req_msg->primary_remote_gid;
1096 primary_path->dlid = req_msg->primary_local_lid;
1097 primary_path->slid = req_msg->primary_remote_lid;
1098 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1099 primary_path->hop_limit = req_msg->primary_hop_limit;
1100 primary_path->traffic_class = req_msg->primary_traffic_class;
1101 primary_path->reversible = 1;
1102 primary_path->pkey = req_msg->pkey;
1103 primary_path->sl = cm_req_get_primary_sl(req_msg);
1104 primary_path->mtu_selector = IB_SA_EQ;
1105 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1106 primary_path->rate_selector = IB_SA_EQ;
1107 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1108 primary_path->packet_life_time_selector = IB_SA_EQ;
1109 primary_path->packet_life_time =
1110 cm_req_get_primary_local_ack_timeout(req_msg);
1111 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1112
1113 if (req_msg->alt_local_lid) {
1114 memset(alt_path, 0, sizeof *alt_path);
1115 alt_path->dgid = req_msg->alt_local_gid;
1116 alt_path->sgid = req_msg->alt_remote_gid;
1117 alt_path->dlid = req_msg->alt_local_lid;
1118 alt_path->slid = req_msg->alt_remote_lid;
1119 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1120 alt_path->hop_limit = req_msg->alt_hop_limit;
1121 alt_path->traffic_class = req_msg->alt_traffic_class;
1122 alt_path->reversible = 1;
1123 alt_path->pkey = req_msg->pkey;
1124 alt_path->sl = cm_req_get_alt_sl(req_msg);
1125 alt_path->mtu_selector = IB_SA_EQ;
1126 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1127 alt_path->rate_selector = IB_SA_EQ;
1128 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1129 alt_path->packet_life_time_selector = IB_SA_EQ;
1130 alt_path->packet_life_time =
1131 cm_req_get_alt_local_ack_timeout(req_msg);
1132 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1133 }
1134}
1135
1136static void cm_format_req_event(struct cm_work *work,
1137 struct cm_id_private *cm_id_priv,
1138 struct ib_cm_id *listen_id)
1139{
1140 struct cm_req_msg *req_msg;
1141 struct ib_cm_req_event_param *param;
1142
1143 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1144 param = &work->cm_event.param.req_rcvd;
1145 param->listen_id = listen_id;
a977049d
HR		 1146 param->port = cm_id_priv->av.port->port_num;
1147 param->primary_path = &work->path[0];
1148 if (req_msg->alt_local_lid)
1149 param->alternate_path = &work->path[1];
1150 else
1151 param->alternate_path = NULL;
1152 param->remote_ca_guid = req_msg->local_ca_guid;
1153 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1154 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1155 param->qp_type = cm_req_get_qp_type(req_msg);
1156 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1157 param->responder_resources = cm_req_get_init_depth(req_msg);
1158 param->initiator_depth = cm_req_get_resp_res(req_msg);
1159 param->local_cm_response_timeout =
1160 cm_req_get_remote_resp_timeout(req_msg);
1161 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1162 param->remote_cm_response_timeout =
1163 cm_req_get_local_resp_timeout(req_msg);
1164 param->retry_count = cm_req_get_retry_count(req_msg);
1165 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1166 param->srq = cm_req_get_srq(req_msg);
1167 work->cm_event.private_data = &req_msg->private_data;
1168}
1169
1170static void cm_process_work(struct cm_id_private *cm_id_priv,
1171 struct cm_work *work)
1172{
1173 unsigned long flags;
1174 int ret;
1175
1176 /* We will typically only have the current event to report. */
1177 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1178 cm_free_work(work);
1179
1180 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1181 spin_lock_irqsave(&cm_id_priv->lock, flags);
1182 work = cm_dequeue_work(cm_id_priv);
1183 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1184 BUG_ON(!work);
1185 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1186 &work->cm_event);
1187 cm_free_work(work);
1188 }
1189 cm_deref_id(cm_id_priv);
1190 if (ret)
04c33543 1191 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 1192}
1193
1194static void cm_format_mra(struct cm_mra_msg *mra_msg,
1195 struct cm_id_private *cm_id_priv,
1196 enum cm_msg_response msg_mraed, u8 service_timeout,
1197 const void *private_data, u8 private_data_len)
1198{
1199 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1200 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1201 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1202 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1203 cm_mra_set_service_timeout(mra_msg, service_timeout);
1204
1205 if (private_data && private_data_len)
1206 memcpy(mra_msg->private_data, private_data, private_data_len);
1207}
1208
1209static void cm_format_rej(struct cm_rej_msg *rej_msg,
1210 struct cm_id_private *cm_id_priv,
1211 enum ib_cm_rej_reason reason,
1212 void *ari,
1213 u8 ari_length,
1214 const void *private_data,
1215 u8 private_data_len)
1216{
1217 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1218 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1219
1220 switch(cm_id_priv->id.state) {
1221 case IB_CM_REQ_RCVD:
1222 rej_msg->local_comm_id = 0;
1223 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1224 break;
1225 case IB_CM_MRA_REQ_SENT:
1226 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1227 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1228 break;
1229 case IB_CM_REP_RCVD:
1230 case IB_CM_MRA_REP_SENT:
1231 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1232 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1233 break;
1234 default:
1235 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1236 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1237 break;
1238 }
1239
97f52eb4 1240 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1241 if (ari && ari_length) {
1242 cm_rej_set_reject_info_len(rej_msg, ari_length);
1243 memcpy(rej_msg->ari, ari, ari_length);
1244 }
1245
1246 if (private_data && private_data_len)
1247 memcpy(rej_msg->private_data, private_data, private_data_len);
1248}
1249
1250static void cm_dup_req_handler(struct cm_work *work,
1251 struct cm_id_private *cm_id_priv)
1252{
1253 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1254 unsigned long flags;
1255 int ret;
1256
1257 /* Quick state check to discard duplicate REQs. */
1258 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1259 return;
1260
1261 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1262 if (ret)
1263 return;
1264
1265 spin_lock_irqsave(&cm_id_priv->lock, flags);
1266 switch (cm_id_priv->id.state) {
1267 case IB_CM_MRA_REQ_SENT:
1268 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1269 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1270 cm_id_priv->private_data,
1271 cm_id_priv->private_data_len);
1272 break;
1273 case IB_CM_TIMEWAIT:
1274 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1275 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1276 break;
1277 default:
1278 goto unlock;
1279 }
1280 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1281
34816ad9 1282 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1283 if (ret)
1284 goto free;
1285 return;
1286
1287unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1288free: cm_free_msg(msg);
1289}
1290
1291static struct cm_id_private * cm_match_req(struct cm_work *work,
1292 struct cm_id_private *cm_id_priv)
1293{
1294 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1295 struct cm_timewait_info *timewait_info;
1296 struct cm_req_msg *req_msg;
1297 unsigned long flags;
1298
1299 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1300
1301 /* Check for duplicate REQ and stale connections. */
1302 spin_lock_irqsave(&cm.lock, flags);
1303 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1304 if (!timewait_info)
1305 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1306
1307 if (timewait_info) {
1308 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1309 timewait_info->work.remote_id);
1310 spin_unlock_irqrestore(&cm.lock, flags);
1311 if (cur_cm_id_priv) {
1312 cm_dup_req_handler(work, cur_cm_id_priv);
1313 cm_deref_id(cur_cm_id_priv);
1314 } else
1315 cm_issue_rej(work->port, work->mad_recv_wc,
1316 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1317 NULL, 0);
1318 goto error;
1319 }
1320
1321 /* Find matching listen request. */
07d357d0 1322 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
6e61d04f
SH		 1323 req_msg->service_id,
1324 req_msg->private_data);
a977049d
HR		 1325 if (!listen_cm_id_priv) {
1326 spin_unlock_irqrestore(&cm.lock, flags);
1327 cm_issue_rej(work->port, work->mad_recv_wc,
1328 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1329 NULL, 0);
1330 goto error;
1331 }
1332 atomic_inc(&listen_cm_id_priv->refcount);
1333 atomic_inc(&cm_id_priv->refcount);
1334 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1335 atomic_inc(&cm_id_priv->work_count);
1336 spin_unlock_irqrestore(&cm.lock, flags);
1337 return listen_cm_id_priv;
1338
1339error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1340 return NULL;
1341}
1342
1343static int cm_req_handler(struct cm_work *work)
1344{
1345 struct ib_cm_id *cm_id;
1346 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1347 struct cm_req_msg *req_msg;
1348 int ret;
1349
1350 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1351
07d357d0 1352 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 1353 if (IS_ERR(cm_id))
1354 return PTR_ERR(cm_id);
1355
1356 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1357 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1358 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 1359 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 1360 &cm_id_priv->av);
1361 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1362 id.local_id);
1363 if (IS_ERR(cm_id_priv->timewait_info)) {
1364 ret = PTR_ERR(cm_id_priv->timewait_info);
76842405 1365 goto destroy;
a977049d
HR		 1366 }
1367 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1368 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1369 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1370
1371 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1372 if (!listen_cm_id_priv) {
1373 ret = -EINVAL;
76842405
SH		 1374 kfree(cm_id_priv->timewait_info);
1375 goto destroy;
a977049d
HR		 1376 }
1377
1378 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1379 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1380 cm_id_priv->id.service_id = req_msg->service_id;
97f52eb4 1381 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1382
1383 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1384 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
76842405
SH		 1385 if (ret) {
1386 ib_get_cached_gid(work->port->cm_dev->device,
1387 work->port->port_num, 0, &work->path[0].sgid);
1388 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1389 &work->path[0].sgid, sizeof work->path[0].sgid,
1390 NULL, 0);
1391 goto rejected;
1392 }
a977049d
HR		 1393 if (req_msg->alt_local_lid) {
1394 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
76842405
SH		 1395 if (ret) {
1396 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1397 &work->path[0].sgid,
1398 sizeof work->path[0].sgid, NULL, 0);
1399 goto rejected;
1400 }
a977049d
HR		 1401 }
1402 cm_id_priv->tid = req_msg->hdr.tid;
1403 cm_id_priv->timeout_ms = cm_convert_to_ms(
1404 cm_req_get_local_resp_timeout(req_msg));
1405 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1406 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1407 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1408 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1409 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1410 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1411 cm_id_priv->local_ack_timeout =
1412 cm_req_get_primary_local_ack_timeout(req_msg);
1413 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1414 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
ae7971a7 1415 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
a977049d
HR		 1416
1417 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1418 cm_process_work(cm_id_priv, work);
1419 cm_deref_id(listen_cm_id_priv);
1420 return 0;
1421
76842405
SH		 1422rejected:
1423 atomic_dec(&cm_id_priv->refcount);
a977049d 1424 cm_deref_id(listen_cm_id_priv);
76842405
SH		 1425destroy:
1426 ib_destroy_cm_id(cm_id);
a977049d
HR		 1427 return ret;
1428}
1429
1430static void cm_format_rep(struct cm_rep_msg *rep_msg,
1431 struct cm_id_private *cm_id_priv,
1432 struct ib_cm_rep_param *param)
1433{
1434 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1435 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1436 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1437 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1438 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1439 rep_msg->resp_resources = param->responder_resources;
1440 rep_msg->initiator_depth = param->initiator_depth;
1441 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1442 cm_rep_set_failover(rep_msg, param->failover_accepted);
1443 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1444 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1445 cm_rep_set_srq(rep_msg, param->srq);
1446 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1447
1448 if (param->private_data && param->private_data_len)
1449 memcpy(rep_msg->private_data, param->private_data,
1450 param->private_data_len);
1451}
1452
1453int ib_send_cm_rep(struct ib_cm_id *cm_id,
1454 struct ib_cm_rep_param *param)
1455{
1456 struct cm_id_private *cm_id_priv;
1457 struct ib_mad_send_buf *msg;
1458 struct cm_rep_msg *rep_msg;
a977049d
HR		 1459 unsigned long flags;
1460 int ret;
1461
1462 if (param->private_data &&
1463 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1464 return -EINVAL;
1465
1466 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1467 spin_lock_irqsave(&cm_id_priv->lock, flags);
1468 if (cm_id->state != IB_CM_REQ_RCVD &&
1469 cm_id->state != IB_CM_MRA_REQ_SENT) {
1470 ret = -EINVAL;
1471 goto out;
1472 }
1473
1474 ret = cm_alloc_msg(cm_id_priv, &msg);
1475 if (ret)
1476 goto out;
1477
1478 rep_msg = (struct cm_rep_msg *) msg->mad;
1479 cm_format_rep(rep_msg, cm_id_priv, param);
34816ad9 1480 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1481 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1482
34816ad9 1483 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1484 if (ret) {
1485 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1486 cm_free_msg(msg);
1487 return ret;
1488 }
1489
1490 cm_id->state = IB_CM_REP_SENT;
1491 cm_id_priv->msg = msg;
1492 cm_id_priv->initiator_depth = param->initiator_depth;
1493 cm_id_priv->responder_resources = param->responder_resources;
1494 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1495 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1496
1497out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1498 return ret;
1499}
1500EXPORT_SYMBOL(ib_send_cm_rep);
1501
1502static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1503 struct cm_id_private *cm_id_priv,
1504 const void *private_data,
1505 u8 private_data_len)
1506{
1507 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1508 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1509 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1510
1511 if (private_data && private_data_len)
1512 memcpy(rtu_msg->private_data, private_data, private_data_len);
1513}
1514
1515int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1516 const void *private_data,
1517 u8 private_data_len)
1518{
1519 struct cm_id_private *cm_id_priv;
1520 struct ib_mad_send_buf *msg;
a977049d
HR		 1521 unsigned long flags;
1522 void *data;
1523 int ret;
1524
1525 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1526 return -EINVAL;
1527
1528 data = cm_copy_private_data(private_data, private_data_len);
1529 if (IS_ERR(data))
1530 return PTR_ERR(data);
1531
1532 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1533 spin_lock_irqsave(&cm_id_priv->lock, flags);
1534 if (cm_id->state != IB_CM_REP_RCVD &&
1535 cm_id->state != IB_CM_MRA_REP_SENT) {
1536 ret = -EINVAL;
1537 goto error;
1538 }
1539
1540 ret = cm_alloc_msg(cm_id_priv, &msg);
1541 if (ret)
1542 goto error;
1543
1544 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1545 private_data, private_data_len);
1546
34816ad9 1547 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1548 if (ret) {
1549 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1550 cm_free_msg(msg);
1551 kfree(data);
1552 return ret;
1553 }
1554
1555 cm_id->state = IB_CM_ESTABLISHED;
1556 cm_set_private_data(cm_id_priv, data, private_data_len);
1557 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1558 return 0;
1559
1560error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1561 kfree(data);
1562 return ret;
1563}
1564EXPORT_SYMBOL(ib_send_cm_rtu);
1565
1566static void cm_format_rep_event(struct cm_work *work)
1567{
1568 struct cm_rep_msg *rep_msg;
1569 struct ib_cm_rep_event_param *param;
1570
1571 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1572 param = &work->cm_event.param.rep_rcvd;
1573 param->remote_ca_guid = rep_msg->local_ca_guid;
1574 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1575 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1576 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1577 param->responder_resources = rep_msg->initiator_depth;
1578 param->initiator_depth = rep_msg->resp_resources;
1579 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1580 param->failover_accepted = cm_rep_get_failover(rep_msg);
1581 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1582 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1583 param->srq = cm_rep_get_srq(rep_msg);
1584 work->cm_event.private_data = &rep_msg->private_data;
1585}
1586
1587static void cm_dup_rep_handler(struct cm_work *work)
1588{
1589 struct cm_id_private *cm_id_priv;
1590 struct cm_rep_msg *rep_msg;
1591 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1592 unsigned long flags;
1593 int ret;
1594
1595 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1596 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1597 rep_msg->local_comm_id);
1598 if (!cm_id_priv)
1599 return;
1600
1601 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1602 if (ret)
1603 goto deref;
1604
1605 spin_lock_irqsave(&cm_id_priv->lock, flags);
1606 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1607 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1608 cm_id_priv->private_data,
1609 cm_id_priv->private_data_len);
1610 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1611 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1612 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1613 cm_id_priv->private_data,
1614 cm_id_priv->private_data_len);
1615 else
1616 goto unlock;
1617 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1618
34816ad9 1619 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1620 if (ret)
1621 goto free;
1622 goto deref;
1623
1624unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1625free: cm_free_msg(msg);
1626deref: cm_deref_id(cm_id_priv);
1627}
1628
1629static int cm_rep_handler(struct cm_work *work)
1630{
1631 struct cm_id_private *cm_id_priv;
1632 struct cm_rep_msg *rep_msg;
1633 unsigned long flags;
1634 int ret;
1635
1636 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1637 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1638 if (!cm_id_priv) {
1639 cm_dup_rep_handler(work);
1640 return -EINVAL;
1641 }
1642
87fd1a11
SH		 1643 cm_format_rep_event(work);
1644
1645 spin_lock_irqsave(&cm_id_priv->lock, flags);
1646 switch (cm_id_priv->id.state) {
1647 case IB_CM_REQ_SENT:
1648 case IB_CM_MRA_REQ_RCVD:
1649 break;
1650 default:
1651 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1652 ret = -EINVAL;
1653 goto error;
1654 }
1655
a977049d
HR		 1656 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1657 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1658 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1659
87fd1a11 1660 spin_lock(&cm.lock);
a977049d
HR		 1661 /* Check for duplicate REP. */
1662 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1663 spin_unlock(&cm.lock);
1664 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1665 ret = -EINVAL;
1666 goto error;
1667 }
1668 /* Check for a stale connection. */
1669 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1670 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1671 &cm.remote_id_table);
1672 cm_id_priv->timewait_info->inserted_remote_id = 0;
1673 spin_unlock(&cm.lock);
1674 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1675 cm_issue_rej(work->port, work->mad_recv_wc,
1676 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1677 NULL, 0);
1678 ret = -EINVAL;
1679 goto error;
1680 }
87fd1a11 1681 spin_unlock(&cm.lock);
a977049d 1682
a977049d
HR		 1683 cm_id_priv->id.state = IB_CM_REP_RCVD;
1684 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1685 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1686 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1687 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1688 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1689 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1690
1691 /* todo: handle peer_to_peer */
1692
34816ad9 1693 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1694 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1695 if (!ret)
1696 list_add_tail(&work->list, &cm_id_priv->work_list);
1697 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1698
1699 if (ret)
1700 cm_process_work(cm_id_priv, work);
1701 else
1702 cm_deref_id(cm_id_priv);
1703 return 0;
1704
87fd1a11 1705error:
a977049d
HR		 1706 cm_deref_id(cm_id_priv);
1707 return ret;
1708}
1709
1710static int cm_establish_handler(struct cm_work *work)
1711{
1712 struct cm_id_private *cm_id_priv;
1713 unsigned long flags;
1714 int ret;
1715
1716 /* See comment in ib_cm_establish about lookup. */
1717 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1718 if (!cm_id_priv)
1719 return -EINVAL;
1720
1721 spin_lock_irqsave(&cm_id_priv->lock, flags);
1722 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1723 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1724 goto out;
1725 }
1726
34816ad9 1727 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1728 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1729 if (!ret)
1730 list_add_tail(&work->list, &cm_id_priv->work_list);
1731 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1732
1733 if (ret)
1734 cm_process_work(cm_id_priv, work);
1735 else
1736 cm_deref_id(cm_id_priv);
1737 return 0;
1738out:
1739 cm_deref_id(cm_id_priv);
1740 return -EINVAL;
1741}
1742
1743static int cm_rtu_handler(struct cm_work *work)
1744{
1745 struct cm_id_private *cm_id_priv;
1746 struct cm_rtu_msg *rtu_msg;
1747 unsigned long flags;
1748 int ret;
1749
1750 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1751 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1752 rtu_msg->local_comm_id);
1753 if (!cm_id_priv)
1754 return -EINVAL;
1755
1756 work->cm_event.private_data = &rtu_msg->private_data;
1757
1758 spin_lock_irqsave(&cm_id_priv->lock, flags);
1759 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1760 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1761 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1762 goto out;
1763 }
1764 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1765
34816ad9 1766 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1767 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1768 if (!ret)
1769 list_add_tail(&work->list, &cm_id_priv->work_list);
1770 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1771
1772 if (ret)
1773 cm_process_work(cm_id_priv, work);
1774 else
1775 cm_deref_id(cm_id_priv);
1776 return 0;
1777out:
1778 cm_deref_id(cm_id_priv);
1779 return -EINVAL;
1780}
1781
1782static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1783 struct cm_id_private *cm_id_priv,
1784 const void *private_data,
1785 u8 private_data_len)
1786{
1787 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1788 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1789 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1790 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1791 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1792
1793 if (private_data && private_data_len)
1794 memcpy(dreq_msg->private_data, private_data, private_data_len);
1795}
1796
1797int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1798 const void *private_data,
1799 u8 private_data_len)
1800{
1801 struct cm_id_private *cm_id_priv;
1802 struct ib_mad_send_buf *msg;
a977049d
HR		 1803 unsigned long flags;
1804 int ret;
1805
1806 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1807 return -EINVAL;
1808
1809 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1810 spin_lock_irqsave(&cm_id_priv->lock, flags);
1811 if (cm_id->state != IB_CM_ESTABLISHED) {
1812 ret = -EINVAL;
1813 goto out;
1814 }
1815
1816 ret = cm_alloc_msg(cm_id_priv, &msg);
1817 if (ret) {
1818 cm_enter_timewait(cm_id_priv);
1819 goto out;
1820 }
1821
1822 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1823 private_data, private_data_len);
34816ad9 1824 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1825 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1826
34816ad9 1827 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1828 if (ret) {
1829 cm_enter_timewait(cm_id_priv);
1830 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1831 cm_free_msg(msg);
1832 return ret;
1833 }
1834
1835 cm_id->state = IB_CM_DREQ_SENT;
1836 cm_id_priv->msg = msg;
1837out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1838 return ret;
1839}
1840EXPORT_SYMBOL(ib_send_cm_dreq);
1841
1842static void cm_format_drep(struct cm_drep_msg *drep_msg,
1843 struct cm_id_private *cm_id_priv,
1844 const void *private_data,
1845 u8 private_data_len)
1846{
1847 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1848 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1849 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1850
1851 if (private_data && private_data_len)
1852 memcpy(drep_msg->private_data, private_data, private_data_len);
1853}
1854
1855int ib_send_cm_drep(struct ib_cm_id *cm_id,
1856 const void *private_data,
1857 u8 private_data_len)
1858{
1859 struct cm_id_private *cm_id_priv;
1860 struct ib_mad_send_buf *msg;
a977049d
HR		 1861 unsigned long flags;
1862 void *data;
1863 int ret;
1864
1865 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1866 return -EINVAL;
1867
1868 data = cm_copy_private_data(private_data, private_data_len);
1869 if (IS_ERR(data))
1870 return PTR_ERR(data);
1871
1872 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1873 spin_lock_irqsave(&cm_id_priv->lock, flags);
1874 if (cm_id->state != IB_CM_DREQ_RCVD) {
1875 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1876 kfree(data);
1877 return -EINVAL;
1878 }
1879
1880 cm_set_private_data(cm_id_priv, data, private_data_len);
1881 cm_enter_timewait(cm_id_priv);
1882
1883 ret = cm_alloc_msg(cm_id_priv, &msg);
1884 if (ret)
1885 goto out;
1886
1887 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1888 private_data, private_data_len);
1889
34816ad9 1890 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1891 if (ret) {
1892 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1893 cm_free_msg(msg);
1894 return ret;
1895 }
1896
1897out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1898 return ret;
1899}
1900EXPORT_SYMBOL(ib_send_cm_drep);
1901
1902static int cm_dreq_handler(struct cm_work *work)
1903{
1904 struct cm_id_private *cm_id_priv;
1905 struct cm_dreq_msg *dreq_msg;
1906 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1907 unsigned long flags;
1908 int ret;
1909
1910 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1911 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1912 dreq_msg->local_comm_id);
1913 if (!cm_id_priv)
1914 return -EINVAL;
1915
1916 work->cm_event.private_data = &dreq_msg->private_data;
1917
1918 spin_lock_irqsave(&cm_id_priv->lock, flags);
1919 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1920 goto unlock;
1921
1922 switch (cm_id_priv->id.state) {
1923 case IB_CM_REP_SENT:
1924 case IB_CM_DREQ_SENT:
34816ad9 1925 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1926 break;
1927 case IB_CM_ESTABLISHED:
1928 case IB_CM_MRA_REP_RCVD:
1929 break;
1930 case IB_CM_TIMEWAIT:
1931 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1932 goto unlock;
1933
1934 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1935 cm_id_priv->private_data,
1936 cm_id_priv->private_data_len);
1937 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1938
34816ad9 1939 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 1940 cm_free_msg(msg);
1941 goto deref;
1942 default:
1943 goto unlock;
1944 }
1945 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1946 cm_id_priv->tid = dreq_msg->hdr.tid;
1947 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1948 if (!ret)
1949 list_add_tail(&work->list, &cm_id_priv->work_list);
1950 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1951
1952 if (ret)
1953 cm_process_work(cm_id_priv, work);
1954 else
1955 cm_deref_id(cm_id_priv);
1956 return 0;
1957
1958unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1959deref: cm_deref_id(cm_id_priv);
1960 return -EINVAL;
1961}
1962
1963static int cm_drep_handler(struct cm_work *work)
1964{
1965 struct cm_id_private *cm_id_priv;
1966 struct cm_drep_msg *drep_msg;
1967 unsigned long flags;
1968 int ret;
1969
1970 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
1971 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
1972 drep_msg->local_comm_id);
1973 if (!cm_id_priv)
1974 return -EINVAL;
1975
1976 work->cm_event.private_data = &drep_msg->private_data;
1977
1978 spin_lock_irqsave(&cm_id_priv->lock, flags);
1979 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
1980 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
1981 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1982 goto out;
1983 }
1984 cm_enter_timewait(cm_id_priv);
1985
34816ad9 1986 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1987 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1988 if (!ret)
1989 list_add_tail(&work->list, &cm_id_priv->work_list);
1990 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1991
1992 if (ret)
1993 cm_process_work(cm_id_priv, work);
1994 else
1995 cm_deref_id(cm_id_priv);
1996 return 0;
1997out:
1998 cm_deref_id(cm_id_priv);
1999 return -EINVAL;
2000}
2001
2002int ib_send_cm_rej(struct ib_cm_id *cm_id,
2003 enum ib_cm_rej_reason reason,
2004 void *ari,
2005 u8 ari_length,
2006 const void *private_data,
2007 u8 private_data_len)
2008{
2009 struct cm_id_private *cm_id_priv;
2010 struct ib_mad_send_buf *msg;
a977049d
HR		 2011 unsigned long flags;
2012 int ret;
2013
2014 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2015 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2016 return -EINVAL;
2017
2018 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2019
2020 spin_lock_irqsave(&cm_id_priv->lock, flags);
2021 switch (cm_id->state) {
2022 case IB_CM_REQ_SENT:
2023 case IB_CM_MRA_REQ_RCVD:
2024 case IB_CM_REQ_RCVD:
2025 case IB_CM_MRA_REQ_SENT:
2026 case IB_CM_REP_RCVD:
2027 case IB_CM_MRA_REP_SENT:
2028 ret = cm_alloc_msg(cm_id_priv, &msg);
2029 if (!ret)
2030 cm_format_rej((struct cm_rej_msg *) msg->mad,
2031 cm_id_priv, reason, ari, ari_length,
2032 private_data, private_data_len);
2033
2034 cm_reset_to_idle(cm_id_priv);
2035 break;
2036 case IB_CM_REP_SENT:
2037 case IB_CM_MRA_REP_RCVD:
2038 ret = cm_alloc_msg(cm_id_priv, &msg);
2039 if (!ret)
2040 cm_format_rej((struct cm_rej_msg *) msg->mad,
2041 cm_id_priv, reason, ari, ari_length,
2042 private_data, private_data_len);
2043
2044 cm_enter_timewait(cm_id_priv);
2045 break;
2046 default:
2047 ret = -EINVAL;
2048 goto out;
2049 }
2050
2051 if (ret)
2052 goto out;
2053
34816ad9 2054 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2055 if (ret)
2056 cm_free_msg(msg);
2057
2058out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2059 return ret;
2060}
2061EXPORT_SYMBOL(ib_send_cm_rej);
2062
2063static void cm_format_rej_event(struct cm_work *work)
2064{
2065 struct cm_rej_msg *rej_msg;
2066 struct ib_cm_rej_event_param *param;
2067
2068 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2069 param = &work->cm_event.param.rej_rcvd;
2070 param->ari = rej_msg->ari;
2071 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 2072 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 2073 work->cm_event.private_data = &rej_msg->private_data;
2074}
2075
2076static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2077{
2078 struct cm_timewait_info *timewait_info;
2079 struct cm_id_private *cm_id_priv;
2080 unsigned long flags;
97f52eb4 2081 __be32 remote_id;
a977049d
HR		 2082
2083 remote_id = rej_msg->local_comm_id;
2084
97f52eb4 2085 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
a977049d 2086 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 2087 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 2088 remote_id);
2089 if (!timewait_info) {
2090 spin_unlock_irqrestore(&cm.lock, flags);
2091 return NULL;
2092 }
f06d2653
SH		 2093 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2094 (timewait_info->work.local_id ^
2095 cm.random_id_operand));
a977049d
HR		 2096 if (cm_id_priv) {
2097 if (cm_id_priv->id.remote_id == remote_id)
2098 atomic_inc(&cm_id_priv->refcount);
2099 else
2100 cm_id_priv = NULL;
2101 }
2102 spin_unlock_irqrestore(&cm.lock, flags);
2103 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2104 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2105 else
2106 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2107
2108 return cm_id_priv;
2109}
2110
2111static int cm_rej_handler(struct cm_work *work)
2112{
2113 struct cm_id_private *cm_id_priv;
2114 struct cm_rej_msg *rej_msg;
2115 unsigned long flags;
2116 int ret;
2117
2118 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2119 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2120 if (!cm_id_priv)
2121 return -EINVAL;
2122
2123 cm_format_rej_event(work);
2124
2125 spin_lock_irqsave(&cm_id_priv->lock, flags);
2126 switch (cm_id_priv->id.state) {
2127 case IB_CM_REQ_SENT:
2128 case IB_CM_MRA_REQ_RCVD:
2129 case IB_CM_REP_SENT:
2130 case IB_CM_MRA_REP_RCVD:
34816ad9 2131 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2132 /* fall through */
2133 case IB_CM_REQ_RCVD:
2134 case IB_CM_MRA_REQ_SENT:
97f52eb4 2135 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2136 cm_enter_timewait(cm_id_priv);
2137 else
2138 cm_reset_to_idle(cm_id_priv);
2139 break;
2140 case IB_CM_DREQ_SENT:
34816ad9 2141 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2142 /* fall through */
2143 case IB_CM_REP_RCVD:
2144 case IB_CM_MRA_REP_SENT:
2145 case IB_CM_ESTABLISHED:
2146 cm_enter_timewait(cm_id_priv);
2147 break;
2148 default:
2149 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2150 ret = -EINVAL;
2151 goto out;
2152 }
2153
2154 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2155 if (!ret)
2156 list_add_tail(&work->list, &cm_id_priv->work_list);
2157 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2158
2159 if (ret)
2160 cm_process_work(cm_id_priv, work);
2161 else
2162 cm_deref_id(cm_id_priv);
2163 return 0;
2164out:
2165 cm_deref_id(cm_id_priv);
2166 return -EINVAL;
2167}
2168
2169int ib_send_cm_mra(struct ib_cm_id *cm_id,
2170 u8 service_timeout,
2171 const void *private_data,
2172 u8 private_data_len)
2173{
2174 struct cm_id_private *cm_id_priv;
2175 struct ib_mad_send_buf *msg;
a977049d
HR		 2176 void *data;
2177 unsigned long flags;
2178 int ret;
2179
2180 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2181 return -EINVAL;
2182
2183 data = cm_copy_private_data(private_data, private_data_len);
2184 if (IS_ERR(data))
2185 return PTR_ERR(data);
2186
2187 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2188
2189 spin_lock_irqsave(&cm_id_priv->lock, flags);
2190 switch(cm_id_priv->id.state) {
2191 case IB_CM_REQ_RCVD:
2192 ret = cm_alloc_msg(cm_id_priv, &msg);
2193 if (ret)
2194 goto error1;
2195
2196 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2197 CM_MSG_RESPONSE_REQ, service_timeout,
2198 private_data, private_data_len);
34816ad9 2199 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2200 if (ret)
2201 goto error2;
2202 cm_id->state = IB_CM_MRA_REQ_SENT;
2203 break;
2204 case IB_CM_REP_RCVD:
2205 ret = cm_alloc_msg(cm_id_priv, &msg);
2206 if (ret)
2207 goto error1;
2208
2209 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2210 CM_MSG_RESPONSE_REP, service_timeout,
2211 private_data, private_data_len);
34816ad9 2212 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2213 if (ret)
2214 goto error2;
2215 cm_id->state = IB_CM_MRA_REP_SENT;
2216 break;
2217 case IB_CM_ESTABLISHED:
2218 ret = cm_alloc_msg(cm_id_priv, &msg);
2219 if (ret)
2220 goto error1;
2221
2222 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2223 CM_MSG_RESPONSE_OTHER, service_timeout,
2224 private_data, private_data_len);
34816ad9 2225 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2226 if (ret)
2227 goto error2;
2228 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2229 break;
2230 default:
2231 ret = -EINVAL;
2232 goto error1;
2233 }
2234 cm_id_priv->service_timeout = service_timeout;
2235 cm_set_private_data(cm_id_priv, data, private_data_len);
2236 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2237 return 0;
2238
2239error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2240 kfree(data);
2241 return ret;
2242
2243error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2244 kfree(data);
2245 cm_free_msg(msg);
2246 return ret;
2247}
2248EXPORT_SYMBOL(ib_send_cm_mra);
2249
2250static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2251{
2252 switch (cm_mra_get_msg_mraed(mra_msg)) {
2253 case CM_MSG_RESPONSE_REQ:
2254 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2255 case CM_MSG_RESPONSE_REP:
2256 case CM_MSG_RESPONSE_OTHER:
2257 return cm_acquire_id(mra_msg->remote_comm_id,
2258 mra_msg->local_comm_id);
2259 default:
2260 return NULL;
2261 }
2262}
2263
2264static int cm_mra_handler(struct cm_work *work)
2265{
2266 struct cm_id_private *cm_id_priv;
2267 struct cm_mra_msg *mra_msg;
2268 unsigned long flags;
2269 int timeout, ret;
2270
2271 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2272 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2273 if (!cm_id_priv)
2274 return -EINVAL;
2275
2276 work->cm_event.private_data = &mra_msg->private_data;
2277 work->cm_event.param.mra_rcvd.service_timeout =
2278 cm_mra_get_service_timeout(mra_msg);
2279 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2280 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2281
2282 spin_lock_irqsave(&cm_id_priv->lock, flags);
2283 switch (cm_id_priv->id.state) {
2284 case IB_CM_REQ_SENT:
2285 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2286 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2287 cm_id_priv->msg, timeout))
a977049d
HR		 2288 goto out;
2289 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2290 break;
2291 case IB_CM_REP_SENT:
2292 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2293 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2294 cm_id_priv->msg, timeout))
a977049d
HR		 2295 goto out;
2296 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2297 break;
2298 case IB_CM_ESTABLISHED:
2299 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2300 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2301 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2302 cm_id_priv->msg, timeout))
a977049d
HR		 2303 goto out;
2304 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2305 break;
2306 default:
2307 goto out;
2308 }
2309
2310 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2311 cm_id_priv->id.state;
2312 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2313 if (!ret)
2314 list_add_tail(&work->list, &cm_id_priv->work_list);
2315 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2316
2317 if (ret)
2318 cm_process_work(cm_id_priv, work);
2319 else
2320 cm_deref_id(cm_id_priv);
2321 return 0;
2322out:
2323 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2324 cm_deref_id(cm_id_priv);
2325 return -EINVAL;
2326}
2327
2328static void cm_format_lap(struct cm_lap_msg *lap_msg,
2329 struct cm_id_private *cm_id_priv,
2330 struct ib_sa_path_rec *alternate_path,
2331 const void *private_data,
2332 u8 private_data_len)
2333{
2334 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2335 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2336 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2337 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2338 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2339 /* todo: need remote CM response timeout */
2340 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2341 lap_msg->alt_local_lid = alternate_path->slid;
2342 lap_msg->alt_remote_lid = alternate_path->dlid;
2343 lap_msg->alt_local_gid = alternate_path->sgid;
2344 lap_msg->alt_remote_gid = alternate_path->dgid;
2345 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2346 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2347 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2348 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2349 cm_lap_set_sl(lap_msg, alternate_path->sl);
2350 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2351 cm_lap_set_local_ack_timeout(lap_msg,
2352 min(31, alternate_path->packet_life_time + 1));
2353
2354 if (private_data && private_data_len)
2355 memcpy(lap_msg->private_data, private_data, private_data_len);
2356}
2357
2358int ib_send_cm_lap(struct ib_cm_id *cm_id,
2359 struct ib_sa_path_rec *alternate_path,
2360 const void *private_data,
2361 u8 private_data_len)
2362{
2363 struct cm_id_private *cm_id_priv;
2364 struct ib_mad_send_buf *msg;
a977049d
HR		 2365 unsigned long flags;
2366 int ret;
2367
2368 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2369 return -EINVAL;
2370
2371 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2372 spin_lock_irqsave(&cm_id_priv->lock, flags);
2373 if (cm_id->state != IB_CM_ESTABLISHED ||
2374 cm_id->lap_state != IB_CM_LAP_IDLE) {
2375 ret = -EINVAL;
2376 goto out;
2377 }
2378
2379 ret = cm_alloc_msg(cm_id_priv, &msg);
2380 if (ret)
2381 goto out;
2382
2383 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2384 alternate_path, private_data, private_data_len);
34816ad9 2385 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2386 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2387
34816ad9 2388 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2389 if (ret) {
2390 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2391 cm_free_msg(msg);
2392 return ret;
2393 }
2394
2395 cm_id->lap_state = IB_CM_LAP_SENT;
2396 cm_id_priv->msg = msg;
2397
2398out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2399 return ret;
2400}
2401EXPORT_SYMBOL(ib_send_cm_lap);
2402
2403static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2404 struct cm_lap_msg *lap_msg)
2405{
2406 memset(path, 0, sizeof *path);
2407 path->dgid = lap_msg->alt_local_gid;
2408 path->sgid = lap_msg->alt_remote_gid;
2409 path->dlid = lap_msg->alt_local_lid;
2410 path->slid = lap_msg->alt_remote_lid;
2411 path->flow_label = cm_lap_get_flow_label(lap_msg);
2412 path->hop_limit = lap_msg->alt_hop_limit;
2413 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2414 path->reversible = 1;
2415 /* pkey is same as in REQ */
2416 path->sl = cm_lap_get_sl(lap_msg);
2417 path->mtu_selector = IB_SA_EQ;
2418 /* mtu is same as in REQ */
2419 path->rate_selector = IB_SA_EQ;
2420 path->rate = cm_lap_get_packet_rate(lap_msg);
2421 path->packet_life_time_selector = IB_SA_EQ;
2422 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2423 path->packet_life_time -= (path->packet_life_time > 0);
2424}
2425
2426static int cm_lap_handler(struct cm_work *work)
2427{
2428 struct cm_id_private *cm_id_priv;
2429 struct cm_lap_msg *lap_msg;
2430 struct ib_cm_lap_event_param *param;
2431 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2432 unsigned long flags;
2433 int ret;
2434
2435 /* todo: verify LAP request and send reject APR if invalid. */
2436 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2437 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2438 lap_msg->local_comm_id);
2439 if (!cm_id_priv)
2440 return -EINVAL;
2441
2442 param = &work->cm_event.param.lap_rcvd;
2443 param->alternate_path = &work->path[0];
2444 cm_format_path_from_lap(param->alternate_path, lap_msg);
2445 work->cm_event.private_data = &lap_msg->private_data;
2446
2447 spin_lock_irqsave(&cm_id_priv->lock, flags);
2448 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2449 goto unlock;
2450
2451 switch (cm_id_priv->id.lap_state) {
2452 case IB_CM_LAP_IDLE:
2453 break;
2454 case IB_CM_MRA_LAP_SENT:
2455 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2456 goto unlock;
2457
2458 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2459 CM_MSG_RESPONSE_OTHER,
2460 cm_id_priv->service_timeout,
2461 cm_id_priv->private_data,
2462 cm_id_priv->private_data_len);
2463 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2464
34816ad9 2465 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2466 cm_free_msg(msg);
2467 goto deref;
2468 default:
2469 goto unlock;
2470 }
2471
2472 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2473 cm_id_priv->tid = lap_msg->hdr.tid;
2474 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2475 if (!ret)
2476 list_add_tail(&work->list, &cm_id_priv->work_list);
2477 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2478
2479 if (ret)
2480 cm_process_work(cm_id_priv, work);
2481 else
2482 cm_deref_id(cm_id_priv);
2483 return 0;
2484
2485unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2486deref: cm_deref_id(cm_id_priv);
2487 return -EINVAL;
2488}
2489
2490static void cm_format_apr(struct cm_apr_msg *apr_msg,
2491 struct cm_id_private *cm_id_priv,
2492 enum ib_cm_apr_status status,
2493 void *info,
2494 u8 info_length,
2495 const void *private_data,
2496 u8 private_data_len)
2497{
2498 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2499 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2500 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2501 apr_msg->ap_status = (u8) status;
2502
2503 if (info && info_length) {
2504 apr_msg->info_length = info_length;
2505 memcpy(apr_msg->info, info, info_length);
2506 }
2507
2508 if (private_data && private_data_len)
2509 memcpy(apr_msg->private_data, private_data, private_data_len);
2510}
2511
2512int ib_send_cm_apr(struct ib_cm_id *cm_id,
2513 enum ib_cm_apr_status status,
2514 void *info,
2515 u8 info_length,
2516 const void *private_data,
2517 u8 private_data_len)
2518{
2519 struct cm_id_private *cm_id_priv;
2520 struct ib_mad_send_buf *msg;
a977049d
HR		 2521 unsigned long flags;
2522 int ret;
2523
2524 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2525 (info && info_length > IB_CM_APR_INFO_LENGTH))
2526 return -EINVAL;
2527
2528 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2529 spin_lock_irqsave(&cm_id_priv->lock, flags);
2530 if (cm_id->state != IB_CM_ESTABLISHED ||
2531 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2532 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2533 ret = -EINVAL;
2534 goto out;
2535 }
2536
2537 ret = cm_alloc_msg(cm_id_priv, &msg);
2538 if (ret)
2539 goto out;
2540
2541 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2542 info, info_length, private_data, private_data_len);
34816ad9 2543 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2544 if (ret) {
2545 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2546 cm_free_msg(msg);
2547 return ret;
2548 }
2549
2550 cm_id->lap_state = IB_CM_LAP_IDLE;
2551out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2552 return ret;
2553}
2554EXPORT_SYMBOL(ib_send_cm_apr);
2555
2556static int cm_apr_handler(struct cm_work *work)
2557{
2558 struct cm_id_private *cm_id_priv;
2559 struct cm_apr_msg *apr_msg;
2560 unsigned long flags;
2561 int ret;
2562
2563 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2564 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2565 apr_msg->local_comm_id);
2566 if (!cm_id_priv)
2567 return -EINVAL; /* Unmatched reply. */
2568
2569 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2570 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2571 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2572 work->cm_event.private_data = &apr_msg->private_data;
2573
2574 spin_lock_irqsave(&cm_id_priv->lock, flags);
2575 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2576 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2577 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2578 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2579 goto out;
2580 }
2581 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
34816ad9 2582 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2583 cm_id_priv->msg = NULL;
2584
2585 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2586 if (!ret)
2587 list_add_tail(&work->list, &cm_id_priv->work_list);
2588 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2589
2590 if (ret)
2591 cm_process_work(cm_id_priv, work);
2592 else
2593 cm_deref_id(cm_id_priv);
2594 return 0;
2595out:
2596 cm_deref_id(cm_id_priv);
2597 return -EINVAL;
2598}
2599
2600static int cm_timewait_handler(struct cm_work *work)
2601{
2602 struct cm_timewait_info *timewait_info;
2603 struct cm_id_private *cm_id_priv;
2604 unsigned long flags;
2605 int ret;
2606
2607 timewait_info = (struct cm_timewait_info *)work;
2608 cm_cleanup_timewait(timewait_info);
2609
2610 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2611 timewait_info->work.remote_id);
2612 if (!cm_id_priv)
2613 return -EINVAL;
2614
2615 spin_lock_irqsave(&cm_id_priv->lock, flags);
2616 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2617 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2618 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2619 goto out;
2620 }
2621 cm_id_priv->id.state = IB_CM_IDLE;
2622 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2623 if (!ret)
2624 list_add_tail(&work->list, &cm_id_priv->work_list);
2625 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2626
2627 if (ret)
2628 cm_process_work(cm_id_priv, work);
2629 else
2630 cm_deref_id(cm_id_priv);
2631 return 0;
2632out:
2633 cm_deref_id(cm_id_priv);
2634 return -EINVAL;
2635}
2636
2637static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2638 struct cm_id_private *cm_id_priv,
2639 struct ib_cm_sidr_req_param *param)
2640{
2641 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2642 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2643 sidr_req_msg->request_id = cm_id_priv->id.local_id;
75af9088 2644 sidr_req_msg->pkey = cpu_to_be16(param->path->pkey);
a977049d
HR		 2645 sidr_req_msg->service_id = param->service_id;
2646
2647 if (param->private_data && param->private_data_len)
2648 memcpy(sidr_req_msg->private_data, param->private_data,
2649 param->private_data_len);
2650}
2651
2652int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2653 struct ib_cm_sidr_req_param *param)
2654{
2655 struct cm_id_private *cm_id_priv;
2656 struct ib_mad_send_buf *msg;
a977049d
HR		 2657 unsigned long flags;
2658 int ret;
2659
2660 if (!param->path || (param->private_data &&
2661 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2662 return -EINVAL;
2663
2664 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2665 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2666 if (ret)
2667 goto out;
2668
2669 cm_id->service_id = param->service_id;
97f52eb4 2670 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2671 cm_id_priv->timeout_ms = param->timeout_ms;
2672 cm_id_priv->max_cm_retries = param->max_cm_retries;
2673 ret = cm_alloc_msg(cm_id_priv, &msg);
2674 if (ret)
2675 goto out;
2676
2677 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2678 param);
34816ad9 2679 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2680 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2681
2682 spin_lock_irqsave(&cm_id_priv->lock, flags);
2683 if (cm_id->state == IB_CM_IDLE)
34816ad9 2684 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2685 else
2686 ret = -EINVAL;
2687
2688 if (ret) {
2689 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2690 cm_free_msg(msg);
2691 goto out;
2692 }
2693 cm_id->state = IB_CM_SIDR_REQ_SENT;
2694 cm_id_priv->msg = msg;
2695 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2696out:
2697 return ret;
2698}
2699EXPORT_SYMBOL(ib_send_cm_sidr_req);
2700
2701static void cm_format_sidr_req_event(struct cm_work *work,
2702 struct ib_cm_id *listen_id)
2703{
2704 struct cm_sidr_req_msg *sidr_req_msg;
2705 struct ib_cm_sidr_req_event_param *param;
2706
2707 sidr_req_msg = (struct cm_sidr_req_msg *)
2708 work->mad_recv_wc->recv_buf.mad;
2709 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 2710 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 2711 param->listen_id = listen_id;
a977049d
HR		 2712 param->port = work->port->port_num;
2713 work->cm_event.private_data = &sidr_req_msg->private_data;
2714}
2715
2716static int cm_sidr_req_handler(struct cm_work *work)
2717{
2718 struct ib_cm_id *cm_id;
2719 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2720 struct cm_sidr_req_msg *sidr_req_msg;
2721 struct ib_wc *wc;
2722 unsigned long flags;
2723
07d357d0 2724 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 2725 if (IS_ERR(cm_id))
2726 return PTR_ERR(cm_id);
2727 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2728
2729 /* Record SGID/SLID and request ID for lookup. */
2730 sidr_req_msg = (struct cm_sidr_req_msg *)
2731 work->mad_recv_wc->recv_buf.mad;
2732 wc = work->mad_recv_wc->wc;
97f52eb4 2733 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 2734 cm_id_priv->av.dgid.global.interface_id = 0;
2735 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 2736 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 2737 &cm_id_priv->av);
2738 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2739 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2740 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2741 atomic_inc(&cm_id_priv->work_count);
2742
2743 spin_lock_irqsave(&cm.lock, flags);
2744 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2745 if (cur_cm_id_priv) {
2746 spin_unlock_irqrestore(&cm.lock, flags);
2747 goto out; /* Duplicate message. */
2748 }
07d357d0 2749 cur_cm_id_priv = cm_find_listen(cm_id->device,
6e61d04f
SH		 2750 sidr_req_msg->service_id,
2751 sidr_req_msg->private_data);
a977049d
HR		 2752 if (!cur_cm_id_priv) {
2753 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2754 spin_unlock_irqrestore(&cm.lock, flags);
2755 /* todo: reply with no match */
2756 goto out; /* No match. */
2757 }
2758 atomic_inc(&cur_cm_id_priv->refcount);
2759 spin_unlock_irqrestore(&cm.lock, flags);
2760
2761 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2762 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2763 cm_id_priv->id.service_id = sidr_req_msg->service_id;
97f52eb4 2764 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2765
2766 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2767 cm_process_work(cm_id_priv, work);
2768 cm_deref_id(cur_cm_id_priv);
2769 return 0;
2770out:
2771 ib_destroy_cm_id(&cm_id_priv->id);
2772 return -EINVAL;
2773}
2774
2775static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2776 struct cm_id_private *cm_id_priv,
2777 struct ib_cm_sidr_rep_param *param)
2778{
2779 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2780 cm_id_priv->tid);
2781 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2782 sidr_rep_msg->status = param->status;
2783 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2784 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2785 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2786
2787 if (param->info && param->info_length)
2788 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2789
2790 if (param->private_data && param->private_data_len)
2791 memcpy(sidr_rep_msg->private_data, param->private_data,
2792 param->private_data_len);
2793}
2794
2795int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2796 struct ib_cm_sidr_rep_param *param)
2797{
2798 struct cm_id_private *cm_id_priv;
2799 struct ib_mad_send_buf *msg;
a977049d
HR		 2800 unsigned long flags;
2801 int ret;
2802
2803 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2804 (param->private_data &&
2805 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2806 return -EINVAL;
2807
2808 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2809 spin_lock_irqsave(&cm_id_priv->lock, flags);
2810 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2811 ret = -EINVAL;
2812 goto error;
2813 }
2814
2815 ret = cm_alloc_msg(cm_id_priv, &msg);
2816 if (ret)
2817 goto error;
2818
2819 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2820 param);
34816ad9 2821 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2822 if (ret) {
2823 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2824 cm_free_msg(msg);
2825 return ret;
2826 }
2827 cm_id->state = IB_CM_IDLE;
2828 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2829
2830 spin_lock_irqsave(&cm.lock, flags);
2831 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2832 spin_unlock_irqrestore(&cm.lock, flags);
2833 return 0;
2834
2835error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2836 return ret;
2837}
2838EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2839
2840static void cm_format_sidr_rep_event(struct cm_work *work)
2841{
2842 struct cm_sidr_rep_msg *sidr_rep_msg;
2843 struct ib_cm_sidr_rep_event_param *param;
2844
2845 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2846 work->mad_recv_wc->recv_buf.mad;
2847 param = &work->cm_event.param.sidr_rep_rcvd;
2848 param->status = sidr_rep_msg->status;
2849 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2850 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2851 param->info = &sidr_rep_msg->info;
2852 param->info_len = sidr_rep_msg->info_length;
2853 work->cm_event.private_data = &sidr_rep_msg->private_data;
2854}
2855
2856static int cm_sidr_rep_handler(struct cm_work *work)
2857{
2858 struct cm_sidr_rep_msg *sidr_rep_msg;
2859 struct cm_id_private *cm_id_priv;
2860 unsigned long flags;
2861
2862 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2863 work->mad_recv_wc->recv_buf.mad;
2864 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2865 if (!cm_id_priv)
2866 return -EINVAL; /* Unmatched reply. */
2867
2868 spin_lock_irqsave(&cm_id_priv->lock, flags);
2869 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2870 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2871 goto out;
2872 }
2873 cm_id_priv->id.state = IB_CM_IDLE;
34816ad9 2874 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2875 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2876
2877 cm_format_sidr_rep_event(work);
2878 cm_process_work(cm_id_priv, work);
2879 return 0;
2880out:
2881 cm_deref_id(cm_id_priv);
2882 return -EINVAL;
2883}
2884
2885static void cm_process_send_error(struct ib_mad_send_buf *msg,
2886 enum ib_wc_status wc_status)
2887{
2888 struct cm_id_private *cm_id_priv;
2889 struct ib_cm_event cm_event;
2890 enum ib_cm_state state;
2891 unsigned long flags;
2892 int ret;
2893
2894 memset(&cm_event, 0, sizeof cm_event);
2895 cm_id_priv = msg->context[0];
2896
2897 /* Discard old sends or ones without a response. */
2898 spin_lock_irqsave(&cm_id_priv->lock, flags);
2899 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2900 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2901 goto discard;
2902
2903 switch (state) {
2904 case IB_CM_REQ_SENT:
2905 case IB_CM_MRA_REQ_RCVD:
2906 cm_reset_to_idle(cm_id_priv);
2907 cm_event.event = IB_CM_REQ_ERROR;
2908 break;
2909 case IB_CM_REP_SENT:
2910 case IB_CM_MRA_REP_RCVD:
2911 cm_reset_to_idle(cm_id_priv);
2912 cm_event.event = IB_CM_REP_ERROR;
2913 break;
2914 case IB_CM_DREQ_SENT:
2915 cm_enter_timewait(cm_id_priv);
2916 cm_event.event = IB_CM_DREQ_ERROR;
2917 break;
2918 case IB_CM_SIDR_REQ_SENT:
2919 cm_id_priv->id.state = IB_CM_IDLE;
2920 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2921 break;
2922 default:
2923 goto discard;
2924 }
2925 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2926 cm_event.param.send_status = wc_status;
2927
2928 /* No other events can occur on the cm_id at this point. */
2929 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2930 cm_free_msg(msg);
2931 if (ret)
2932 ib_destroy_cm_id(&cm_id_priv->id);
2933 return;
2934discard:
2935 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2936 cm_free_msg(msg);
2937}
2938
2939static void cm_send_handler(struct ib_mad_agent *mad_agent,
2940 struct ib_mad_send_wc *mad_send_wc)
2941{
34816ad9 2942 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
a977049d
HR		 2943
2944 switch (mad_send_wc->status) {
2945 case IB_WC_SUCCESS:
2946 case IB_WC_WR_FLUSH_ERR:
2947 cm_free_msg(msg);
2948 break;
2949 default:
2950 if (msg->context[0] && msg->context[1])
2951 cm_process_send_error(msg, mad_send_wc->status);
2952 else
2953 cm_free_msg(msg);
2954 break;
2955 }
2956}
2957
2958static void cm_work_handler(void *data)
2959{
2960 struct cm_work *work = data;
2961 int ret;
2962
2963 switch (work->cm_event.event) {
2964 case IB_CM_REQ_RECEIVED:
2965 ret = cm_req_handler(work);
2966 break;
2967 case IB_CM_MRA_RECEIVED:
2968 ret = cm_mra_handler(work);
2969 break;
2970 case IB_CM_REJ_RECEIVED:
2971 ret = cm_rej_handler(work);
2972 break;
2973 case IB_CM_REP_RECEIVED:
2974 ret = cm_rep_handler(work);
2975 break;
2976 case IB_CM_RTU_RECEIVED:
2977 ret = cm_rtu_handler(work);
2978 break;
2979 case IB_CM_USER_ESTABLISHED:
2980 ret = cm_establish_handler(work);
2981 break;
2982 case IB_CM_DREQ_RECEIVED:
2983 ret = cm_dreq_handler(work);
2984 break;
2985 case IB_CM_DREP_RECEIVED:
2986 ret = cm_drep_handler(work);
2987 break;
2988 case IB_CM_SIDR_REQ_RECEIVED:
2989 ret = cm_sidr_req_handler(work);
2990 break;
2991 case IB_CM_SIDR_REP_RECEIVED:
2992 ret = cm_sidr_rep_handler(work);
2993 break;
2994 case IB_CM_LAP_RECEIVED:
2995 ret = cm_lap_handler(work);
2996 break;
2997 case IB_CM_APR_RECEIVED:
2998 ret = cm_apr_handler(work);
2999 break;
3000 case IB_CM_TIMEWAIT_EXIT:
3001 ret = cm_timewait_handler(work);
3002 break;
3003 default:
3004 ret = -EINVAL;
3005 break;
3006 }
3007 if (ret)
3008 cm_free_work(work);
3009}
3010
3011int ib_cm_establish(struct ib_cm_id *cm_id)
3012{
3013 struct cm_id_private *cm_id_priv;
3014 struct cm_work *work;
3015 unsigned long flags;
3016 int ret = 0;
3017
3018 work = kmalloc(sizeof *work, GFP_ATOMIC);
3019 if (!work)
3020 return -ENOMEM;
3021
3022 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3023 spin_lock_irqsave(&cm_id_priv->lock, flags);
3024 switch (cm_id->state)
3025 {
3026 case IB_CM_REP_SENT:
3027 case IB_CM_MRA_REP_RCVD:
3028 cm_id->state = IB_CM_ESTABLISHED;
3029 break;
3030 case IB_CM_ESTABLISHED:
3031 ret = -EISCONN;
3032 break;
3033 default:
3034 ret = -EINVAL;
3035 break;
3036 }
3037 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3038
3039 if (ret) {
3040 kfree(work);
3041 goto out;
3042 }
3043
3044 /*
3045 * The CM worker thread may try to destroy the cm_id before it
3046 * can execute this work item. To prevent potential deadlock,
3047 * we need to find the cm_id once we're in the context of the
3048 * worker thread, rather than holding a reference on it.
3049 */
3050 INIT_WORK(&work->work, cm_work_handler, work);
3051 work->local_id = cm_id->local_id;
3052 work->remote_id = cm_id->remote_id;
3053 work->mad_recv_wc = NULL;
3054 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3055 queue_work(cm.wq, &work->work);
3056out:
3057 return ret;
3058}
3059EXPORT_SYMBOL(ib_cm_establish);
3060
3061static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3062 struct ib_mad_recv_wc *mad_recv_wc)
3063{
3064 struct cm_work *work;
3065 enum ib_cm_event_type event;
3066 int paths = 0;
3067
3068 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3069 case CM_REQ_ATTR_ID:
3070 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3071 alt_local_lid != 0);
3072 event = IB_CM_REQ_RECEIVED;
3073 break;
3074 case CM_MRA_ATTR_ID:
3075 event = IB_CM_MRA_RECEIVED;
3076 break;
3077 case CM_REJ_ATTR_ID:
3078 event = IB_CM_REJ_RECEIVED;
3079 break;
3080 case CM_REP_ATTR_ID:
3081 event = IB_CM_REP_RECEIVED;
3082 break;
3083 case CM_RTU_ATTR_ID:
3084 event = IB_CM_RTU_RECEIVED;
3085 break;
3086 case CM_DREQ_ATTR_ID:
3087 event = IB_CM_DREQ_RECEIVED;
3088 break;
3089 case CM_DREP_ATTR_ID:
3090 event = IB_CM_DREP_RECEIVED;
3091 break;
3092 case CM_SIDR_REQ_ATTR_ID:
3093 event = IB_CM_SIDR_REQ_RECEIVED;
3094 break;
3095 case CM_SIDR_REP_ATTR_ID:
3096 event = IB_CM_SIDR_REP_RECEIVED;
3097 break;
3098 case CM_LAP_ATTR_ID:
3099 paths = 1;
3100 event = IB_CM_LAP_RECEIVED;
3101 break;
3102 case CM_APR_ATTR_ID:
3103 event = IB_CM_APR_RECEIVED;
3104 break;
3105 default:
3106 ib_free_recv_mad(mad_recv_wc);
3107 return;
3108 }
3109
3110 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3111 GFP_KERNEL);
3112 if (!work) {
3113 ib_free_recv_mad(mad_recv_wc);
3114 return;
3115 }
3116
3117 INIT_WORK(&work->work, cm_work_handler, work);
3118 work->cm_event.event = event;
3119 work->mad_recv_wc = mad_recv_wc;
3120 work->port = (struct cm_port *)mad_agent->context;
3121 queue_work(cm.wq, &work->work);
3122}
3123
3124static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3125 struct ib_qp_attr *qp_attr,
3126 int *qp_attr_mask)
3127{
3128 unsigned long flags;
3129 int ret;
3130
3131 spin_lock_irqsave(&cm_id_priv->lock, flags);
3132 switch (cm_id_priv->id.state) {
3133 case IB_CM_REQ_SENT:
3134 case IB_CM_MRA_REQ_RCVD:
3135 case IB_CM_REQ_RCVD:
3136 case IB_CM_MRA_REQ_SENT:
3137 case IB_CM_REP_RCVD:
3138 case IB_CM_MRA_REP_SENT:
3139 case IB_CM_REP_SENT:
3140 case IB_CM_MRA_REP_RCVD:
3141 case IB_CM_ESTABLISHED:
3142 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3143 IB_QP_PKEY_INDEX | IB_QP_PORT;
ae7971a7
SH		 3144 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE |
3145 IB_ACCESS_REMOTE_WRITE;
a977049d 3146 if (cm_id_priv->responder_resources)
c1f250c0
SH		 3147 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3148 IB_ACCESS_REMOTE_ATOMIC;
a977049d
HR		 3149 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3150 qp_attr->port_num = cm_id_priv->av.port->port_num;
3151 ret = 0;
3152 break;
3153 default:
3154 ret = -EINVAL;
3155 break;
3156 }
3157 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3158 return ret;
3159}
3160
3161static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3162 struct ib_qp_attr *qp_attr,
3163 int *qp_attr_mask)
3164{
3165 unsigned long flags;
3166 int ret;
3167
3168 spin_lock_irqsave(&cm_id_priv->lock, flags);
3169 switch (cm_id_priv->id.state) {
3170 case IB_CM_REQ_RCVD:
3171 case IB_CM_MRA_REQ_SENT:
3172 case IB_CM_REP_RCVD:
3173 case IB_CM_MRA_REP_SENT:
3174 case IB_CM_REP_SENT:
3175 case IB_CM_MRA_REP_RCVD:
3176 case IB_CM_ESTABLISHED:
3177 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 3178 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d
HR		 3179 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3180 qp_attr->path_mtu = cm_id_priv->path_mtu;
3181 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3182 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
ae7971a7
SH		 3183 if (cm_id_priv->qp_type == IB_QPT_RC) {
3184 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3185 IB_QP_MIN_RNR_TIMER;
3186 qp_attr->max_dest_rd_atomic =
3187 cm_id_priv->responder_resources;
3188 qp_attr->min_rnr_timer = 0;
3189 }
a977049d
HR		 3190 if (cm_id_priv->alt_av.ah_attr.dlid) {
3191 *qp_attr_mask |= IB_QP_ALT_PATH;
0d8fdfd7 3192 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
a977049d
HR		 3193 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3194 }
3195 ret = 0;
3196 break;
3197 default:
3198 ret = -EINVAL;
3199 break;
3200 }
3201 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3202 return ret;
3203}
3204
3205static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3206 struct ib_qp_attr *qp_attr,
3207 int *qp_attr_mask)
3208{
3209 unsigned long flags;
3210 int ret;
3211
3212 spin_lock_irqsave(&cm_id_priv->lock, flags);
3213 switch (cm_id_priv->id.state) {
3214 case IB_CM_REP_RCVD:
3215 case IB_CM_MRA_REP_SENT:
3216 case IB_CM_REP_SENT:
3217 case IB_CM_MRA_REP_RCVD:
3218 case IB_CM_ESTABLISHED:
ae7971a7 3219 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
a977049d 3220 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
ae7971a7
SH		 3221 if (cm_id_priv->qp_type == IB_QPT_RC) {
3222 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3223 IB_QP_RNR_RETRY |
3224 IB_QP_MAX_QP_RD_ATOMIC;
3225 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3226 qp_attr->retry_cnt = cm_id_priv->retry_count;
3227 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3228 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3229 }
a977049d
HR		 3230 if (cm_id_priv->alt_av.ah_attr.dlid) {
3231 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3232 qp_attr->path_mig_state = IB_MIG_REARM;
3233 }
3234 ret = 0;
3235 break;
3236 default:
3237 ret = -EINVAL;
3238 break;
3239 }
3240 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3241 return ret;
3242}
3243
3244int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3245 struct ib_qp_attr *qp_attr,
3246 int *qp_attr_mask)
3247{
3248 struct cm_id_private *cm_id_priv;
3249 int ret;
3250
3251 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3252 switch (qp_attr->qp_state) {
3253 case IB_QPS_INIT:
3254 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3255 break;
3256 case IB_QPS_RTR:
3257 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3258 break;
3259 case IB_QPS_RTS:
3260 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3261 break;
3262 default:
3263 ret = -EINVAL;
3264 break;
3265 }
3266 return ret;
3267}
3268EXPORT_SYMBOL(ib_cm_init_qp_attr);
3269
a977049d
HR		 3270static void cm_add_one(struct ib_device *device)
3271{
3272 struct cm_device *cm_dev;
3273 struct cm_port *port;
3274 struct ib_mad_reg_req reg_req = {
3275 .mgmt_class = IB_MGMT_CLASS_CM,
3276 .mgmt_class_version = IB_CM_CLASS_VERSION
3277 };
3278 struct ib_port_modify port_modify = {
3279 .set_port_cap_mask = IB_PORT_CM_SUP
3280 };
3281 unsigned long flags;
3282 int ret;
3283 u8 i;
3284
07ebafba
TT		 3285 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
3286 return;
3287
a977049d
HR		 3288 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3289 device->phys_port_cnt, GFP_KERNEL);
3290 if (!cm_dev)
3291 return;
3292
3293 cm_dev->device = device;
cf311cd4 3294 cm_dev->ca_guid = device->node_guid;
a977049d
HR		 3295
3296 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3297 for (i = 1; i <= device->phys_port_cnt; i++) {
3298 port = &cm_dev->port[i-1];
3299 port->cm_dev = cm_dev;
3300 port->port_num = i;
3301 port->mad_agent = ib_register_mad_agent(device, i,
3302 IB_QPT_GSI,
3303 &reg_req,
3304 0,
3305 cm_send_handler,
3306 cm_recv_handler,
3307 port);
3308 if (IS_ERR(port->mad_agent))
cf311cd4 3309 goto error1;
a977049d
HR		 3310
3311 ret = ib_modify_port(device, i, 0, &port_modify);
3312 if (ret)
cf311cd4 3313 goto error2;
a977049d
HR		 3314 }
3315 ib_set_client_data(device, &cm_client, cm_dev);
3316
3317 write_lock_irqsave(&cm.device_lock, flags);
3318 list_add_tail(&cm_dev->list, &cm.device_list);
3319 write_unlock_irqrestore(&cm.device_lock, flags);
3320 return;
3321
a977049d 3322error2:
cf311cd4
SH		 3323 ib_unregister_mad_agent(port->mad_agent);
3324error1:
a977049d
HR		 3325 port_modify.set_port_cap_mask = 0;
3326 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3327 while (--i) {
3328 port = &cm_dev->port[i-1];
3329 ib_modify_port(device, port->port_num, 0, &port_modify);
3330 ib_unregister_mad_agent(port->mad_agent);
3331 }
a977049d
HR		 3332 kfree(cm_dev);
3333}
3334
3335static void cm_remove_one(struct ib_device *device)
3336{
3337 struct cm_device *cm_dev;
3338 struct cm_port *port;
3339 struct ib_port_modify port_modify = {
3340 .clr_port_cap_mask = IB_PORT_CM_SUP
3341 };
3342 unsigned long flags;
3343 int i;
3344
3345 cm_dev = ib_get_client_data(device, &cm_client);
3346 if (!cm_dev)
3347 return;
3348
3349 write_lock_irqsave(&cm.device_lock, flags);
3350 list_del(&cm_dev->list);
3351 write_unlock_irqrestore(&cm.device_lock, flags);
3352
3353 for (i = 1; i <= device->phys_port_cnt; i++) {
3354 port = &cm_dev->port[i-1];
3355 ib_modify_port(device, port->port_num, 0, &port_modify);
3356 ib_unregister_mad_agent(port->mad_agent);
3357 }
3358 kfree(cm_dev);
3359}
3360
3361static int __init ib_cm_init(void)
3362{
3363 int ret;
3364
3365 memset(&cm, 0, sizeof cm);
3366 INIT_LIST_HEAD(&cm.device_list);
3367 rwlock_init(&cm.device_lock);
3368 spin_lock_init(&cm.lock);
3369 cm.listen_service_table = RB_ROOT;
3370 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3371 cm.remote_id_table = RB_ROOT;
3372 cm.remote_qp_table = RB_ROOT;
3373 cm.remote_sidr_table = RB_ROOT;
3374 idr_init(&cm.local_id_table);
f06d2653 3375 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
a977049d
HR		 3376 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3377
3378 cm.wq = create_workqueue("ib_cm");
3379 if (!cm.wq)
3380 return -ENOMEM;
3381
3382 ret = ib_register_client(&cm_client);
3383 if (ret)
3384 goto error;
3385
3386 return 0;
3387error:
3388 destroy_workqueue(cm.wq);
3389 return ret;
3390}
3391
3392static void __exit ib_cm_cleanup(void)
3393{
a977049d
HR		 3394 destroy_workqueue(cm.wq);
3395 ib_unregister_client(&cm_client);
5d7edb3c 3396 idr_destroy(&cm.local_id_table);
a977049d
HR		 3397}
3398
3399module_init(ib_cm_init);
3400module_exit(ib_cm_cleanup);
3401
Linux kernel - Deliverables
This page took 0.300315 seconds and 5 git commands to generate.