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IB/mthca: Return correct number of bits for static rate in query_qp
[deliverable/linux.git] / drivers / infiniband / core / cm.c
CommitLineData
a977049d
HR		 1/*
2 * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 *
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>
44#include <linux/rbtree.h>
45#include <linux/spinlock.h>
46#include <linux/workqueue.h>
47
a4d61e84
RD		 48#include <rdma/ib_cache.h>
49#include <rdma/ib_cm.h>
a977049d
HR		 50#include "cm_msgs.h"
51
52MODULE_AUTHOR("Sean Hefty");
53MODULE_DESCRIPTION("InfiniBand CM");
54MODULE_LICENSE("Dual BSD/GPL");
55
56static void cm_add_one(struct ib_device *device);
57static void cm_remove_one(struct ib_device *device);
58
59static struct ib_client cm_client = {
60 .name = "cm",
61 .add = cm_add_one,
62 .remove = cm_remove_one
63};
64
65static struct ib_cm {
66 spinlock_t lock;
67 struct list_head device_list;
68 rwlock_t device_lock;
69 struct rb_root listen_service_table;
70 u64 listen_service_id;
71 /* struct rb_root peer_service_table; todo: fix peer to peer */
72 struct rb_root remote_qp_table;
73 struct rb_root remote_id_table;
74 struct rb_root remote_sidr_table;
75 struct idr local_id_table;
76 struct workqueue_struct *wq;
77} cm;
78
79struct cm_port {
80 struct cm_device *cm_dev;
81 struct ib_mad_agent *mad_agent;
82 u8 port_num;
83};
84
85struct cm_device {
86 struct list_head list;
87 struct ib_device *device;
97f52eb4 88 __be64 ca_guid;
a977049d
HR		 89 struct cm_port port[0];
90};
91
92struct cm_av {
93 struct cm_port *port;
94 union ib_gid dgid;
95 struct ib_ah_attr ah_attr;
96 u16 pkey_index;
97 u8 packet_life_time;
98};
99
100struct cm_work {
101 struct work_struct work;
102 struct list_head list;
103 struct cm_port *port;
104 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
97f52eb4
SH		 105 __be32 local_id; /* Established / timewait */
106 __be32 remote_id;
a977049d
HR		 107 struct ib_cm_event cm_event;
108 struct ib_sa_path_rec path[0];
109};
110
111struct cm_timewait_info {
112 struct cm_work work; /* Must be first. */
113 struct rb_node remote_qp_node;
114 struct rb_node remote_id_node;
97f52eb4
SH		 115 __be64 remote_ca_guid;
116 __be32 remote_qpn;
a977049d
HR		 117 u8 inserted_remote_qp;
118 u8 inserted_remote_id;
119};
120
121struct cm_id_private {
122 struct ib_cm_id id;
123
124 struct rb_node service_node;
125 struct rb_node sidr_id_node;
87fd1a11 126 spinlock_t lock; /* Do not acquire inside cm.lock */
1b52fa98 127 struct completion comp;
a977049d
HR		 128 atomic_t refcount;
129
130 struct ib_mad_send_buf *msg;
131 struct cm_timewait_info *timewait_info;
132 /* todo: use alternate port on send failure */
133 struct cm_av av;
134 struct cm_av alt_av;
6e61d04f 135 struct ib_cm_compare_data *compare_data;
a977049d
HR		 136
137 void *private_data;
97f52eb4
SH		 138 __be64 tid;
139 __be32 local_qpn;
140 __be32 remote_qpn;
ae7971a7 141 enum ib_qp_type qp_type;
97f52eb4
SH		 142 __be32 sq_psn;
143 __be32 rq_psn;
a977049d
HR		 144 int timeout_ms;
145 enum ib_mtu path_mtu;
146 u8 private_data_len;
147 u8 max_cm_retries;
148 u8 peer_to_peer;
149 u8 responder_resources;
150 u8 initiator_depth;
151 u8 local_ack_timeout;
152 u8 retry_count;
153 u8 rnr_retry_count;
154 u8 service_timeout;
155
156 struct list_head work_list;
157 atomic_t work_count;
158};
159
160static void cm_work_handler(void *data);
161
162static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
163{
164 if (atomic_dec_and_test(&cm_id_priv->refcount))
1b52fa98 165 complete(&cm_id_priv->comp);
a977049d
HR		 166}
167
168static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
169 struct ib_mad_send_buf **msg)
170{
171 struct ib_mad_agent *mad_agent;
172 struct ib_mad_send_buf *m;
173 struct ib_ah *ah;
174
175 mad_agent = cm_id_priv->av.port->mad_agent;
176 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
177 if (IS_ERR(ah))
178 return PTR_ERR(ah);
179
354ba39c
JK		 180 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
181 cm_id_priv->av.pkey_index,
34816ad9 182 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 183 GFP_ATOMIC);
184 if (IS_ERR(m)) {
185 ib_destroy_ah(ah);
186 return PTR_ERR(m);
187 }
188
189 /* Timeout set by caller if response is expected. */
34816ad9
SH		 190 m->ah = ah;
191 m->retries = cm_id_priv->max_cm_retries;
a977049d
HR		 192
193 atomic_inc(&cm_id_priv->refcount);
194 m->context[0] = cm_id_priv;
195 *msg = m;
196 return 0;
197}
198
199static int cm_alloc_response_msg(struct cm_port *port,
200 struct ib_mad_recv_wc *mad_recv_wc,
201 struct ib_mad_send_buf **msg)
202{
203 struct ib_mad_send_buf *m;
204 struct ib_ah *ah;
205
206 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
207 mad_recv_wc->recv_buf.grh, port->port_num);
208 if (IS_ERR(ah))
209 return PTR_ERR(ah);
210
211 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
34816ad9 212 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 213 GFP_ATOMIC);
214 if (IS_ERR(m)) {
215 ib_destroy_ah(ah);
216 return PTR_ERR(m);
217 }
34816ad9 218 m->ah = ah;
a977049d
HR		 219 *msg = m;
220 return 0;
221}
222
223static void cm_free_msg(struct ib_mad_send_buf *msg)
224{
34816ad9 225 ib_destroy_ah(msg->ah);
a977049d
HR		 226 if (msg->context[0])
227 cm_deref_id(msg->context[0]);
228 ib_free_send_mad(msg);
229}
230
231static void * cm_copy_private_data(const void *private_data,
232 u8 private_data_len)
233{
234 void *data;
235
236 if (!private_data || !private_data_len)
237 return NULL;
238
239 data = kmalloc(private_data_len, GFP_KERNEL);
240 if (!data)
241 return ERR_PTR(-ENOMEM);
242
243 memcpy(data, private_data, private_data_len);
244 return data;
245}
246
247static void cm_set_private_data(struct cm_id_private *cm_id_priv,
248 void *private_data, u8 private_data_len)
249{
250 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
251 kfree(cm_id_priv->private_data);
252
253 cm_id_priv->private_data = private_data;
254 cm_id_priv->private_data_len = private_data_len;
255}
256
ca222c6b
SH		 257static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
258 struct ib_grh *grh, struct cm_av *av)
a977049d
HR		 259{
260 av->port = port;
261 av->pkey_index = wc->pkey_index;
ca222c6b
SH		 262 ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc,
263 grh, &av->ah_attr);
a977049d
HR		 264}
265
266static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
267{
268 struct cm_device *cm_dev;
269 struct cm_port *port = NULL;
270 unsigned long flags;
271 int ret;
272 u8 p;
273
274 read_lock_irqsave(&cm.device_lock, flags);
275 list_for_each_entry(cm_dev, &cm.device_list, list) {
276 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
277 &p, NULL)) {
278 port = &cm_dev->port[p-1];
279 break;
280 }
281 }
282 read_unlock_irqrestore(&cm.device_lock, flags);
283
284 if (!port)
285 return -EINVAL;
286
287 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
288 be16_to_cpu(path->pkey), &av->pkey_index);
289 if (ret)
290 return ret;
291
292 av->port = port;
ca222c6b
SH		 293 ib_init_ah_from_path(cm_dev->device, port->port_num, path,
294 &av->ah_attr);
a977049d
HR		 295 av->packet_life_time = path->packet_life_time;
296 return 0;
297}
298
299static int cm_alloc_id(struct cm_id_private *cm_id_priv)
300{
301 unsigned long flags;
302 int ret;
de1bb1a6 303 static int next_id;
a977049d
HR		 304
305 do {
306 spin_lock_irqsave(&cm.lock, flags);
de1bb1a6 307 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, next_id++,
97f52eb4 308 (__force int *) &cm_id_priv->id.local_id);
a977049d
HR		 309 spin_unlock_irqrestore(&cm.lock, flags);
310 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
311 return ret;
312}
313
97f52eb4 314static void cm_free_id(__be32 local_id)
a977049d
HR		 315{
316 unsigned long flags;
317
318 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 319 idr_remove(&cm.local_id_table, (__force int) local_id);
a977049d
HR		 320 spin_unlock_irqrestore(&cm.lock, flags);
321}
322
97f52eb4 323static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 324{
325 struct cm_id_private *cm_id_priv;
326
97f52eb4 327 cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id);
a977049d
HR		 328 if (cm_id_priv) {
329 if (cm_id_priv->id.remote_id == remote_id)
330 atomic_inc(&cm_id_priv->refcount);
331 else
332 cm_id_priv = NULL;
333 }
334
335 return cm_id_priv;
336}
337
97f52eb4 338static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 339{
340 struct cm_id_private *cm_id_priv;
341 unsigned long flags;
342
343 spin_lock_irqsave(&cm.lock, flags);
344 cm_id_priv = cm_get_id(local_id, remote_id);
345 spin_unlock_irqrestore(&cm.lock, flags);
346
347 return cm_id_priv;
348}
349
6e61d04f
SH		 350static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
351{
352 int i;
353
354 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
355 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
356 ((unsigned long *) mask)[i];
357}
358
359static int cm_compare_data(struct ib_cm_compare_data *src_data,
360 struct ib_cm_compare_data *dst_data)
361{
362 u8 src[IB_CM_COMPARE_SIZE];
363 u8 dst[IB_CM_COMPARE_SIZE];
364
365 if (!src_data || !dst_data)
366 return 0;
367
368 cm_mask_copy(src, src_data->data, dst_data->mask);
369 cm_mask_copy(dst, dst_data->data, src_data->mask);
370 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
371}
372
373static int cm_compare_private_data(u8 *private_data,
374 struct ib_cm_compare_data *dst_data)
375{
376 u8 src[IB_CM_COMPARE_SIZE];
377
378 if (!dst_data)
379 return 0;
380
381 cm_mask_copy(src, private_data, dst_data->mask);
382 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
383}
384
a977049d
HR		 385static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
386{
387 struct rb_node **link = &cm.listen_service_table.rb_node;
388 struct rb_node *parent = NULL;
389 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 390 __be64 service_id = cm_id_priv->id.service_id;
391 __be64 service_mask = cm_id_priv->id.service_mask;
6e61d04f 392 int data_cmp;
a977049d
HR		 393
394 while (*link) {
395 parent = *link;
396 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
397 service_node);
6e61d04f
SH		 398 data_cmp = cm_compare_data(cm_id_priv->compare_data,
399 cur_cm_id_priv->compare_data);
a977049d 400 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0 401 (service_mask & cur_cm_id_priv->id.service_id) &&
6e61d04f
SH		 402 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
403 !data_cmp)
07d357d0
SH		 404 return cur_cm_id_priv;
405
406 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
407 link = &(*link)->rb_left;
408 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
409 link = &(*link)->rb_right;
410 else if (service_id < cur_cm_id_priv->id.service_id)
a977049d 411 link = &(*link)->rb_left;
6e61d04f
SH		 412 else if (service_id > cur_cm_id_priv->id.service_id)
413 link = &(*link)->rb_right;
414 else if (data_cmp < 0)
415 link = &(*link)->rb_left;
a977049d
HR		 416 else
417 link = &(*link)->rb_right;
418 }
419 rb_link_node(&cm_id_priv->service_node, parent, link);
420 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
421 return NULL;
422}
423
07d357d0 424static struct cm_id_private * cm_find_listen(struct ib_device *device,
6e61d04f
SH		 425 __be64 service_id,
426 u8 *private_data)
a977049d
HR		 427{
428 struct rb_node *node = cm.listen_service_table.rb_node;
429 struct cm_id_private *cm_id_priv;
6e61d04f 430 int data_cmp;
a977049d
HR		 431
432 while (node) {
433 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
6e61d04f
SH		 434 data_cmp = cm_compare_private_data(private_data,
435 cm_id_priv->compare_data);
a977049d 436 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0 437 cm_id_priv->id.service_id &&
6e61d04f 438 (cm_id_priv->id.device == device) && !data_cmp)
a977049d 439 return cm_id_priv;
07d357d0
SH		 440
441 if (device < cm_id_priv->id.device)
442 node = node->rb_left;
443 else if (device > cm_id_priv->id.device)
444 node = node->rb_right;
445 else if (service_id < cm_id_priv->id.service_id)
a977049d 446 node = node->rb_left;
6e61d04f
SH		 447 else if (service_id > cm_id_priv->id.service_id)
448 node = node->rb_right;
449 else if (data_cmp < 0)
450 node = node->rb_left;
a977049d
HR		 451 else
452 node = node->rb_right;
453 }
454 return NULL;
455}
456
457static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
458 *timewait_info)
459{
460 struct rb_node **link = &cm.remote_id_table.rb_node;
461 struct rb_node *parent = NULL;
462 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 463 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
464 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 465
466 while (*link) {
467 parent = *link;
468 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
469 remote_id_node);
470 if (remote_id < cur_timewait_info->work.remote_id)
471 link = &(*link)->rb_left;
472 else if (remote_id > cur_timewait_info->work.remote_id)
473 link = &(*link)->rb_right;
474 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
475 link = &(*link)->rb_left;
476 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
477 link = &(*link)->rb_right;
478 else
479 return cur_timewait_info;
480 }
481 timewait_info->inserted_remote_id = 1;
482 rb_link_node(&timewait_info->remote_id_node, parent, link);
483 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
484 return NULL;
485}
486
97f52eb4
SH		 487static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
488 __be32 remote_id)
a977049d
HR		 489{
490 struct rb_node *node = cm.remote_id_table.rb_node;
491 struct cm_timewait_info *timewait_info;
492
493 while (node) {
494 timewait_info = rb_entry(node, struct cm_timewait_info,
495 remote_id_node);
496 if (remote_id < timewait_info->work.remote_id)
497 node = node->rb_left;
498 else if (remote_id > timewait_info->work.remote_id)
499 node = node->rb_right;
500 else if (remote_ca_guid < timewait_info->remote_ca_guid)
501 node = node->rb_left;
502 else if (remote_ca_guid > timewait_info->remote_ca_guid)
503 node = node->rb_right;
504 else
505 return timewait_info;
506 }
507 return NULL;
508}
509
510static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
511 *timewait_info)
512{
513 struct rb_node **link = &cm.remote_qp_table.rb_node;
514 struct rb_node *parent = NULL;
515 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 516 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
517 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 518
519 while (*link) {
520 parent = *link;
521 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
522 remote_qp_node);
523 if (remote_qpn < cur_timewait_info->remote_qpn)
524 link = &(*link)->rb_left;
525 else if (remote_qpn > cur_timewait_info->remote_qpn)
526 link = &(*link)->rb_right;
527 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
528 link = &(*link)->rb_left;
529 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
530 link = &(*link)->rb_right;
531 else
532 return cur_timewait_info;
533 }
534 timewait_info->inserted_remote_qp = 1;
535 rb_link_node(&timewait_info->remote_qp_node, parent, link);
536 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
537 return NULL;
538}
539
540static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
541 *cm_id_priv)
542{
543 struct rb_node **link = &cm.remote_sidr_table.rb_node;
544 struct rb_node *parent = NULL;
545 struct cm_id_private *cur_cm_id_priv;
546 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 547 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 548
549 while (*link) {
550 parent = *link;
551 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
552 sidr_id_node);
553 if (remote_id < cur_cm_id_priv->id.remote_id)
554 link = &(*link)->rb_left;
555 else if (remote_id > cur_cm_id_priv->id.remote_id)
556 link = &(*link)->rb_right;
557 else {
558 int cmp;
559 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
560 sizeof *port_gid);
561 if (cmp < 0)
562 link = &(*link)->rb_left;
563 else if (cmp > 0)
564 link = &(*link)->rb_right;
565 else
566 return cur_cm_id_priv;
567 }
568 }
569 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
570 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
571 return NULL;
572}
573
574static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
575 enum ib_cm_sidr_status status)
576{
577 struct ib_cm_sidr_rep_param param;
578
579 memset(&param, 0, sizeof param);
580 param.status = status;
581 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
582}
583
07d357d0
SH		 584struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
585 ib_cm_handler cm_handler,
a977049d
HR		 586 void *context)
587{
588 struct cm_id_private *cm_id_priv;
589 int ret;
590
de6eb66b 591 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
a977049d
HR		 592 if (!cm_id_priv)
593 return ERR_PTR(-ENOMEM);
594
a977049d 595 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 596 cm_id_priv->id.device = device;
a977049d
HR		 597 cm_id_priv->id.cm_handler = cm_handler;
598 cm_id_priv->id.context = context;
354ba39c 599 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 600 ret = cm_alloc_id(cm_id_priv);
601 if (ret)
602 goto error;
603
604 spin_lock_init(&cm_id_priv->lock);
1b52fa98 605 init_completion(&cm_id_priv->comp);
a977049d
HR		 606 INIT_LIST_HEAD(&cm_id_priv->work_list);
607 atomic_set(&cm_id_priv->work_count, -1);
608 atomic_set(&cm_id_priv->refcount, 1);
609 return &cm_id_priv->id;
610
611error:
612 kfree(cm_id_priv);
613 return ERR_PTR(-ENOMEM);
614}
615EXPORT_SYMBOL(ib_create_cm_id);
616
617static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
618{
619 struct cm_work *work;
620
621 if (list_empty(&cm_id_priv->work_list))
622 return NULL;
623
624 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
625 list_del(&work->list);
626 return work;
627}
628
629static void cm_free_work(struct cm_work *work)
630{
631 if (work->mad_recv_wc)
632 ib_free_recv_mad(work->mad_recv_wc);
633 kfree(work);
634}
635
636static inline int cm_convert_to_ms(int iba_time)
637{
638 /* approximate conversion to ms from 4.096us x 2^iba_time */
639 return 1 << max(iba_time - 8, 0);
640}
641
642static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
643{
644 unsigned long flags;
645
646 if (!timewait_info->inserted_remote_id &&
647 !timewait_info->inserted_remote_qp)
648 return;
649
650 spin_lock_irqsave(&cm.lock, flags);
651 if (timewait_info->inserted_remote_id) {
652 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
653 timewait_info->inserted_remote_id = 0;
654 }
655
656 if (timewait_info->inserted_remote_qp) {
657 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
658 timewait_info->inserted_remote_qp = 0;
659 }
660 spin_unlock_irqrestore(&cm.lock, flags);
661}
662
97f52eb4 663static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 664{
665 struct cm_timewait_info *timewait_info;
666
de6eb66b 667 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
a977049d
HR		 668 if (!timewait_info)
669 return ERR_PTR(-ENOMEM);
a977049d
HR		 670
671 timewait_info->work.local_id = local_id;
672 INIT_WORK(&timewait_info->work.work, cm_work_handler,
673 &timewait_info->work);
674 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
675 return timewait_info;
676}
677
678static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
679{
680 int wait_time;
681
682 /*
683 * The cm_id could be destroyed by the user before we exit timewait.
684 * To protect against this, we search for the cm_id after exiting
685 * timewait before notifying the user that we've exited timewait.
686 */
687 cm_id_priv->id.state = IB_CM_TIMEWAIT;
688 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
689 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
690 msecs_to_jiffies(wait_time));
691 cm_id_priv->timewait_info = NULL;
692}
693
694static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
695{
696 cm_id_priv->id.state = IB_CM_IDLE;
697 if (cm_id_priv->timewait_info) {
698 cm_cleanup_timewait(cm_id_priv->timewait_info);
699 kfree(cm_id_priv->timewait_info);
700 cm_id_priv->timewait_info = NULL;
701 }
702}
703
04c33543 704static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
a977049d
HR		 705{
706 struct cm_id_private *cm_id_priv;
707 struct cm_work *work;
708 unsigned long flags;
709
710 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
711retest:
712 spin_lock_irqsave(&cm_id_priv->lock, flags);
713 switch (cm_id->state) {
714 case IB_CM_LISTEN:
715 cm_id->state = IB_CM_IDLE;
716 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
717 spin_lock_irqsave(&cm.lock, flags);
718 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
719 spin_unlock_irqrestore(&cm.lock, flags);
720 break;
721 case IB_CM_SIDR_REQ_SENT:
722 cm_id->state = IB_CM_IDLE;
34816ad9 723 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 724 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
725 break;
726 case IB_CM_SIDR_REQ_RCVD:
727 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
728 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
729 break;
730 case IB_CM_REQ_SENT:
227eca83
SH		 731 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
732 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
733 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
734 &cm_id_priv->av.port->cm_dev->ca_guid,
735 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
736 NULL, 0);
737 break;
04c33543
MT		 738 case IB_CM_REQ_RCVD:
739 if (err == -ENOMEM) {
740 /* Do not reject to allow future retries. */
741 cm_reset_to_idle(cm_id_priv);
742 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
743 } else {
744 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
745 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
746 NULL, 0, NULL, 0);
747 }
748 break;
a977049d
HR		 749 case IB_CM_MRA_REQ_RCVD:
750 case IB_CM_REP_SENT:
751 case IB_CM_MRA_REP_RCVD:
34816ad9 752 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 753 /* Fall through */
a977049d
HR		 754 case IB_CM_MRA_REQ_SENT:
755 case IB_CM_REP_RCVD:
756 case IB_CM_MRA_REP_SENT:
757 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
227eca83
SH		 758 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
759 NULL, 0, NULL, 0);
a977049d
HR		 760 break;
761 case IB_CM_ESTABLISHED:
762 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
763 ib_send_cm_dreq(cm_id, NULL, 0);
764 goto retest;
765 case IB_CM_DREQ_SENT:
34816ad9 766 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 767 cm_enter_timewait(cm_id_priv);
768 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
769 break;
770 case IB_CM_DREQ_RCVD:
771 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
772 ib_send_cm_drep(cm_id, NULL, 0);
773 break;
774 default:
775 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
776 break;
777 }
778
779 cm_free_id(cm_id->local_id);
1b52fa98
SH		 780 cm_deref_id(cm_id_priv);
781 wait_for_completion(&cm_id_priv->comp);
a977049d
HR		 782 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
783 cm_free_work(work);
6e61d04f
SH		 784 kfree(cm_id_priv->compare_data);
785 kfree(cm_id_priv->private_data);
a977049d
HR		 786 kfree(cm_id_priv);
787}
04c33543
MT		 788
789void ib_destroy_cm_id(struct ib_cm_id *cm_id)
790{
791 cm_destroy_id(cm_id, 0);
792}
a977049d
HR		 793EXPORT_SYMBOL(ib_destroy_cm_id);
794
6e61d04f
SH		 795int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
796 struct ib_cm_compare_data *compare_data)
a977049d
HR		 797{
798 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
799 unsigned long flags;
800 int ret = 0;
801
97f52eb4
SH		 802 service_mask = service_mask ? service_mask :
803 __constant_cpu_to_be64(~0ULL);
a977049d
HR		 804 service_id &= service_mask;
805 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
806 (service_id != IB_CM_ASSIGN_SERVICE_ID))
807 return -EINVAL;
808
809 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
6e61d04f
SH		 810 if (cm_id->state != IB_CM_IDLE)
811 return -EINVAL;
812
813 if (compare_data) {
814 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
815 GFP_KERNEL);
816 if (!cm_id_priv->compare_data)
817 return -ENOMEM;
818 cm_mask_copy(cm_id_priv->compare_data->data,
819 compare_data->data, compare_data->mask);
820 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
821 IB_CM_COMPARE_SIZE);
822 }
a977049d
HR		 823
824 cm_id->state = IB_CM_LISTEN;
825
826 spin_lock_irqsave(&cm.lock, flags);
827 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
97f52eb4
SH		 828 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
829 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 830 } else {
831 cm_id->service_id = service_id;
832 cm_id->service_mask = service_mask;
833 }
834 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
835 spin_unlock_irqrestore(&cm.lock, flags);
836
837 if (cur_cm_id_priv) {
838 cm_id->state = IB_CM_IDLE;
6e61d04f
SH		 839 kfree(cm_id_priv->compare_data);
840 cm_id_priv->compare_data = NULL;
a977049d
HR		 841 ret = -EBUSY;
842 }
843 return ret;
844}
845EXPORT_SYMBOL(ib_cm_listen);
846
97f52eb4
SH		 847static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
848 enum cm_msg_sequence msg_seq)
a977049d
HR		 849{
850 u64 hi_tid, low_tid;
851
852 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
97f52eb4
SH		 853 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
854 (msg_seq << 30));
a977049d
HR		 855 return cpu_to_be64(hi_tid | low_tid);
856}
857
858static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 859 __be16 attr_id, __be64 tid)
a977049d
HR		 860{
861 hdr->base_version = IB_MGMT_BASE_VERSION;
862 hdr->mgmt_class = IB_MGMT_CLASS_CM;
863 hdr->class_version = IB_CM_CLASS_VERSION;
864 hdr->method = IB_MGMT_METHOD_SEND;
865 hdr->attr_id = attr_id;
866 hdr->tid = tid;
867}
868
869static void cm_format_req(struct cm_req_msg *req_msg,
870 struct cm_id_private *cm_id_priv,
871 struct ib_cm_req_param *param)
872{
873 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
874 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
875
876 req_msg->local_comm_id = cm_id_priv->id.local_id;
877 req_msg->service_id = param->service_id;
878 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
879 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
880 cm_req_set_resp_res(req_msg, param->responder_resources);
881 cm_req_set_init_depth(req_msg, param->initiator_depth);
882 cm_req_set_remote_resp_timeout(req_msg,
883 param->remote_cm_response_timeout);
884 cm_req_set_qp_type(req_msg, param->qp_type);
885 cm_req_set_flow_ctrl(req_msg, param->flow_control);
886 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
887 cm_req_set_local_resp_timeout(req_msg,
888 param->local_cm_response_timeout);
889 cm_req_set_retry_count(req_msg, param->retry_count);
890 req_msg->pkey = param->primary_path->pkey;
891 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
892 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
893 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
894 cm_req_set_srq(req_msg, param->srq);
895
896 req_msg->primary_local_lid = param->primary_path->slid;
897 req_msg->primary_remote_lid = param->primary_path->dlid;
898 req_msg->primary_local_gid = param->primary_path->sgid;
899 req_msg->primary_remote_gid = param->primary_path->dgid;
900 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
901 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
902 req_msg->primary_traffic_class = param->primary_path->traffic_class;
903 req_msg->primary_hop_limit = param->primary_path->hop_limit;
904 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
905 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
906 cm_req_set_primary_local_ack_timeout(req_msg,
907 min(31, param->primary_path->packet_life_time + 1));
908
909 if (param->alternate_path) {
910 req_msg->alt_local_lid = param->alternate_path->slid;
911 req_msg->alt_remote_lid = param->alternate_path->dlid;
912 req_msg->alt_local_gid = param->alternate_path->sgid;
913 req_msg->alt_remote_gid = param->alternate_path->dgid;
914 cm_req_set_alt_flow_label(req_msg,
915 param->alternate_path->flow_label);
916 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
917 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
918 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
919 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
920 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
921 cm_req_set_alt_local_ack_timeout(req_msg,
922 min(31, param->alternate_path->packet_life_time + 1));
923 }
924
925 if (param->private_data && param->private_data_len)
926 memcpy(req_msg->private_data, param->private_data,
927 param->private_data_len);
928}
929
858119e1 930static int cm_validate_req_param(struct ib_cm_req_param *param)
a977049d
HR		 931{
932 /* peer-to-peer not supported */
933 if (param->peer_to_peer)
934 return -EINVAL;
935
936 if (!param->primary_path)
937 return -EINVAL;
938
939 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
940 return -EINVAL;
941
942 if (param->private_data &&
943 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
944 return -EINVAL;
945
946 if (param->alternate_path &&
947 (param->alternate_path->pkey != param->primary_path->pkey ||
948 param->alternate_path->mtu != param->primary_path->mtu))
949 return -EINVAL;
950
951 return 0;
952}
953
954int ib_send_cm_req(struct ib_cm_id *cm_id,
955 struct ib_cm_req_param *param)
956{
957 struct cm_id_private *cm_id_priv;
a977049d
HR		 958 struct cm_req_msg *req_msg;
959 unsigned long flags;
960 int ret;
961
962 ret = cm_validate_req_param(param);
963 if (ret)
964 return ret;
965
966 /* Verify that we're not in timewait. */
967 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
968 spin_lock_irqsave(&cm_id_priv->lock, flags);
969 if (cm_id->state != IB_CM_IDLE) {
970 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
971 ret = -EINVAL;
972 goto out;
973 }
974 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
975
976 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
977 id.local_id);
75df23e2
SH		 978 if (IS_ERR(cm_id_priv->timewait_info)) {
979 ret = PTR_ERR(cm_id_priv->timewait_info);
a977049d 980 goto out;
75df23e2 981 }
a977049d
HR		 982
983 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
984 if (ret)
985 goto error1;
986 if (param->alternate_path) {
987 ret = cm_init_av_by_path(param->alternate_path,
988 &cm_id_priv->alt_av);
989 if (ret)
990 goto error1;
991 }
992 cm_id->service_id = param->service_id;
97f52eb4 993 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 994 cm_id_priv->timeout_ms = cm_convert_to_ms(
995 param->primary_path->packet_life_time) * 2 +
996 cm_convert_to_ms(
997 param->remote_cm_response_timeout);
998 cm_id_priv->max_cm_retries = param->max_cm_retries;
999 cm_id_priv->initiator_depth = param->initiator_depth;
1000 cm_id_priv->responder_resources = param->responder_resources;
1001 cm_id_priv->retry_count = param->retry_count;
1002 cm_id_priv->path_mtu = param->primary_path->mtu;
ae7971a7 1003 cm_id_priv->qp_type = param->qp_type;
a977049d
HR		 1004
1005 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1006 if (ret)
1007 goto error1;
1008
1009 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1010 cm_format_req(req_msg, cm_id_priv, param);
1011 cm_id_priv->tid = req_msg->hdr.tid;
34816ad9 1012 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1013 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1014
1015 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1016 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
1017 cm_id_priv->local_ack_timeout =
1018 cm_req_get_primary_local_ack_timeout(req_msg);
1019
1020 spin_lock_irqsave(&cm_id_priv->lock, flags);
34816ad9 1021 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
a977049d
HR		 1022 if (ret) {
1023 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1024 goto error2;
1025 }
1026 BUG_ON(cm_id->state != IB_CM_IDLE);
1027 cm_id->state = IB_CM_REQ_SENT;
1028 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1029 return 0;
1030
1031error2: cm_free_msg(cm_id_priv->msg);
1032error1: kfree(cm_id_priv->timewait_info);
1033out: return ret;
1034}
1035EXPORT_SYMBOL(ib_send_cm_req);
1036
1037static int cm_issue_rej(struct cm_port *port,
1038 struct ib_mad_recv_wc *mad_recv_wc,
1039 enum ib_cm_rej_reason reason,
1040 enum cm_msg_response msg_rejected,
1041 void *ari, u8 ari_length)
1042{
1043 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1044 struct cm_rej_msg *rej_msg, *rcv_msg;
1045 int ret;
1046
1047 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1048 if (ret)
1049 return ret;
1050
1051 /* We just need common CM header information. Cast to any message. */
1052 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1053 rej_msg = (struct cm_rej_msg *) msg->mad;
1054
1055 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1056 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1057 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1058 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 1059 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1060
1061 if (ari && ari_length) {
1062 cm_rej_set_reject_info_len(rej_msg, ari_length);
1063 memcpy(rej_msg->ari, ari, ari_length);
1064 }
1065
34816ad9 1066 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1067 if (ret)
1068 cm_free_msg(msg);
1069
1070 return ret;
1071}
1072
97f52eb4
SH		 1073static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1074 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 1075{
1076 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1077 ((local_ca_guid == remote_ca_guid) &&
1078 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1079}
1080
858119e1 1081static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
a977049d
HR		 1082 struct ib_sa_path_rec *primary_path,
1083 struct ib_sa_path_rec *alt_path)
1084{
1085 memset(primary_path, 0, sizeof *primary_path);
1086 primary_path->dgid = req_msg->primary_local_gid;
1087 primary_path->sgid = req_msg->primary_remote_gid;
1088 primary_path->dlid = req_msg->primary_local_lid;
1089 primary_path->slid = req_msg->primary_remote_lid;
1090 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1091 primary_path->hop_limit = req_msg->primary_hop_limit;
1092 primary_path->traffic_class = req_msg->primary_traffic_class;
1093 primary_path->reversible = 1;
1094 primary_path->pkey = req_msg->pkey;
1095 primary_path->sl = cm_req_get_primary_sl(req_msg);
1096 primary_path->mtu_selector = IB_SA_EQ;
1097 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1098 primary_path->rate_selector = IB_SA_EQ;
1099 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1100 primary_path->packet_life_time_selector = IB_SA_EQ;
1101 primary_path->packet_life_time =
1102 cm_req_get_primary_local_ack_timeout(req_msg);
1103 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1104
1105 if (req_msg->alt_local_lid) {
1106 memset(alt_path, 0, sizeof *alt_path);
1107 alt_path->dgid = req_msg->alt_local_gid;
1108 alt_path->sgid = req_msg->alt_remote_gid;
1109 alt_path->dlid = req_msg->alt_local_lid;
1110 alt_path->slid = req_msg->alt_remote_lid;
1111 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1112 alt_path->hop_limit = req_msg->alt_hop_limit;
1113 alt_path->traffic_class = req_msg->alt_traffic_class;
1114 alt_path->reversible = 1;
1115 alt_path->pkey = req_msg->pkey;
1116 alt_path->sl = cm_req_get_alt_sl(req_msg);
1117 alt_path->mtu_selector = IB_SA_EQ;
1118 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1119 alt_path->rate_selector = IB_SA_EQ;
1120 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1121 alt_path->packet_life_time_selector = IB_SA_EQ;
1122 alt_path->packet_life_time =
1123 cm_req_get_alt_local_ack_timeout(req_msg);
1124 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1125 }
1126}
1127
1128static void cm_format_req_event(struct cm_work *work,
1129 struct cm_id_private *cm_id_priv,
1130 struct ib_cm_id *listen_id)
1131{
1132 struct cm_req_msg *req_msg;
1133 struct ib_cm_req_event_param *param;
1134
1135 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1136 param = &work->cm_event.param.req_rcvd;
1137 param->listen_id = listen_id;
a977049d
HR		 1138 param->port = cm_id_priv->av.port->port_num;
1139 param->primary_path = &work->path[0];
1140 if (req_msg->alt_local_lid)
1141 param->alternate_path = &work->path[1];
1142 else
1143 param->alternate_path = NULL;
1144 param->remote_ca_guid = req_msg->local_ca_guid;
1145 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1146 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1147 param->qp_type = cm_req_get_qp_type(req_msg);
1148 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1149 param->responder_resources = cm_req_get_init_depth(req_msg);
1150 param->initiator_depth = cm_req_get_resp_res(req_msg);
1151 param->local_cm_response_timeout =
1152 cm_req_get_remote_resp_timeout(req_msg);
1153 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1154 param->remote_cm_response_timeout =
1155 cm_req_get_local_resp_timeout(req_msg);
1156 param->retry_count = cm_req_get_retry_count(req_msg);
1157 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1158 param->srq = cm_req_get_srq(req_msg);
1159 work->cm_event.private_data = &req_msg->private_data;
1160}
1161
1162static void cm_process_work(struct cm_id_private *cm_id_priv,
1163 struct cm_work *work)
1164{
1165 unsigned long flags;
1166 int ret;
1167
1168 /* We will typically only have the current event to report. */
1169 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1170 cm_free_work(work);
1171
1172 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1173 spin_lock_irqsave(&cm_id_priv->lock, flags);
1174 work = cm_dequeue_work(cm_id_priv);
1175 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1176 BUG_ON(!work);
1177 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1178 &work->cm_event);
1179 cm_free_work(work);
1180 }
1181 cm_deref_id(cm_id_priv);
1182 if (ret)
04c33543 1183 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 1184}
1185
1186static void cm_format_mra(struct cm_mra_msg *mra_msg,
1187 struct cm_id_private *cm_id_priv,
1188 enum cm_msg_response msg_mraed, u8 service_timeout,
1189 const void *private_data, u8 private_data_len)
1190{
1191 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1192 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1193 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1194 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1195 cm_mra_set_service_timeout(mra_msg, service_timeout);
1196
1197 if (private_data && private_data_len)
1198 memcpy(mra_msg->private_data, private_data, private_data_len);
1199}
1200
1201static void cm_format_rej(struct cm_rej_msg *rej_msg,
1202 struct cm_id_private *cm_id_priv,
1203 enum ib_cm_rej_reason reason,
1204 void *ari,
1205 u8 ari_length,
1206 const void *private_data,
1207 u8 private_data_len)
1208{
1209 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1210 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1211
1212 switch(cm_id_priv->id.state) {
1213 case IB_CM_REQ_RCVD:
1214 rej_msg->local_comm_id = 0;
1215 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1216 break;
1217 case IB_CM_MRA_REQ_SENT:
1218 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1219 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1220 break;
1221 case IB_CM_REP_RCVD:
1222 case IB_CM_MRA_REP_SENT:
1223 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1224 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1225 break;
1226 default:
1227 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1228 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1229 break;
1230 }
1231
97f52eb4 1232 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1233 if (ari && ari_length) {
1234 cm_rej_set_reject_info_len(rej_msg, ari_length);
1235 memcpy(rej_msg->ari, ari, ari_length);
1236 }
1237
1238 if (private_data && private_data_len)
1239 memcpy(rej_msg->private_data, private_data, private_data_len);
1240}
1241
1242static void cm_dup_req_handler(struct cm_work *work,
1243 struct cm_id_private *cm_id_priv)
1244{
1245 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1246 unsigned long flags;
1247 int ret;
1248
1249 /* Quick state check to discard duplicate REQs. */
1250 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1251 return;
1252
1253 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1254 if (ret)
1255 return;
1256
1257 spin_lock_irqsave(&cm_id_priv->lock, flags);
1258 switch (cm_id_priv->id.state) {
1259 case IB_CM_MRA_REQ_SENT:
1260 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1261 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1262 cm_id_priv->private_data,
1263 cm_id_priv->private_data_len);
1264 break;
1265 case IB_CM_TIMEWAIT:
1266 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1267 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1268 break;
1269 default:
1270 goto unlock;
1271 }
1272 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1273
34816ad9 1274 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1275 if (ret)
1276 goto free;
1277 return;
1278
1279unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1280free: cm_free_msg(msg);
1281}
1282
1283static struct cm_id_private * cm_match_req(struct cm_work *work,
1284 struct cm_id_private *cm_id_priv)
1285{
1286 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1287 struct cm_timewait_info *timewait_info;
1288 struct cm_req_msg *req_msg;
1289 unsigned long flags;
1290
1291 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1292
1293 /* Check for duplicate REQ and stale connections. */
1294 spin_lock_irqsave(&cm.lock, flags);
1295 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1296 if (!timewait_info)
1297 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1298
1299 if (timewait_info) {
1300 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1301 timewait_info->work.remote_id);
1302 spin_unlock_irqrestore(&cm.lock, flags);
1303 if (cur_cm_id_priv) {
1304 cm_dup_req_handler(work, cur_cm_id_priv);
1305 cm_deref_id(cur_cm_id_priv);
1306 } else
1307 cm_issue_rej(work->port, work->mad_recv_wc,
1308 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1309 NULL, 0);
1310 goto error;
1311 }
1312
1313 /* Find matching listen request. */
07d357d0 1314 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
6e61d04f
SH		 1315 req_msg->service_id,
1316 req_msg->private_data);
a977049d
HR		 1317 if (!listen_cm_id_priv) {
1318 spin_unlock_irqrestore(&cm.lock, flags);
1319 cm_issue_rej(work->port, work->mad_recv_wc,
1320 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1321 NULL, 0);
1322 goto error;
1323 }
1324 atomic_inc(&listen_cm_id_priv->refcount);
1325 atomic_inc(&cm_id_priv->refcount);
1326 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1327 atomic_inc(&cm_id_priv->work_count);
1328 spin_unlock_irqrestore(&cm.lock, flags);
1329 return listen_cm_id_priv;
1330
1331error: cm_cleanup_timewait(cm_id_priv->timewait_info);
1332 return NULL;
1333}
1334
1335static int cm_req_handler(struct cm_work *work)
1336{
1337 struct ib_cm_id *cm_id;
1338 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1339 struct cm_req_msg *req_msg;
1340 int ret;
1341
1342 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1343
07d357d0 1344 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 1345 if (IS_ERR(cm_id))
1346 return PTR_ERR(cm_id);
1347
1348 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1349 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1350 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 1351 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 1352 &cm_id_priv->av);
1353 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1354 id.local_id);
1355 if (IS_ERR(cm_id_priv->timewait_info)) {
1356 ret = PTR_ERR(cm_id_priv->timewait_info);
1357 goto error1;
1358 }
1359 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1360 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1361 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1362
1363 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1364 if (!listen_cm_id_priv) {
1365 ret = -EINVAL;
1366 goto error2;
1367 }
1368
1369 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1370 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1371 cm_id_priv->id.service_id = req_msg->service_id;
97f52eb4 1372 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1373
1374 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1375 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1376 if (ret)
1377 goto error3;
1378 if (req_msg->alt_local_lid) {
1379 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1380 if (ret)
1381 goto error3;
1382 }
1383 cm_id_priv->tid = req_msg->hdr.tid;
1384 cm_id_priv->timeout_ms = cm_convert_to_ms(
1385 cm_req_get_local_resp_timeout(req_msg));
1386 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1387 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1388 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1389 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1390 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1391 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1392 cm_id_priv->local_ack_timeout =
1393 cm_req_get_primary_local_ack_timeout(req_msg);
1394 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1395 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
ae7971a7 1396 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
a977049d
HR		 1397
1398 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1399 cm_process_work(cm_id_priv, work);
1400 cm_deref_id(listen_cm_id_priv);
1401 return 0;
1402
1403error3: atomic_dec(&cm_id_priv->refcount);
1404 cm_deref_id(listen_cm_id_priv);
1405 cm_cleanup_timewait(cm_id_priv->timewait_info);
1406error2: kfree(cm_id_priv->timewait_info);
1b205c2d 1407 cm_id_priv->timewait_info = NULL;
a977049d
HR		 1408error1: ib_destroy_cm_id(&cm_id_priv->id);
1409 return ret;
1410}
1411
1412static void cm_format_rep(struct cm_rep_msg *rep_msg,
1413 struct cm_id_private *cm_id_priv,
1414 struct ib_cm_rep_param *param)
1415{
1416 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1417 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1418 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1419 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1420 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1421 rep_msg->resp_resources = param->responder_resources;
1422 rep_msg->initiator_depth = param->initiator_depth;
1423 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1424 cm_rep_set_failover(rep_msg, param->failover_accepted);
1425 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1426 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1427 cm_rep_set_srq(rep_msg, param->srq);
1428 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1429
1430 if (param->private_data && param->private_data_len)
1431 memcpy(rep_msg->private_data, param->private_data,
1432 param->private_data_len);
1433}
1434
1435int ib_send_cm_rep(struct ib_cm_id *cm_id,
1436 struct ib_cm_rep_param *param)
1437{
1438 struct cm_id_private *cm_id_priv;
1439 struct ib_mad_send_buf *msg;
1440 struct cm_rep_msg *rep_msg;
a977049d
HR		 1441 unsigned long flags;
1442 int ret;
1443
1444 if (param->private_data &&
1445 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1446 return -EINVAL;
1447
1448 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1449 spin_lock_irqsave(&cm_id_priv->lock, flags);
1450 if (cm_id->state != IB_CM_REQ_RCVD &&
1451 cm_id->state != IB_CM_MRA_REQ_SENT) {
1452 ret = -EINVAL;
1453 goto out;
1454 }
1455
1456 ret = cm_alloc_msg(cm_id_priv, &msg);
1457 if (ret)
1458 goto out;
1459
1460 rep_msg = (struct cm_rep_msg *) msg->mad;
1461 cm_format_rep(rep_msg, cm_id_priv, param);
34816ad9 1462 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1463 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1464
34816ad9 1465 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1466 if (ret) {
1467 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1468 cm_free_msg(msg);
1469 return ret;
1470 }
1471
1472 cm_id->state = IB_CM_REP_SENT;
1473 cm_id_priv->msg = msg;
1474 cm_id_priv->initiator_depth = param->initiator_depth;
1475 cm_id_priv->responder_resources = param->responder_resources;
1476 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1477 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1478
1479out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1480 return ret;
1481}
1482EXPORT_SYMBOL(ib_send_cm_rep);
1483
1484static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1485 struct cm_id_private *cm_id_priv,
1486 const void *private_data,
1487 u8 private_data_len)
1488{
1489 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1490 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1491 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1492
1493 if (private_data && private_data_len)
1494 memcpy(rtu_msg->private_data, private_data, private_data_len);
1495}
1496
1497int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1498 const void *private_data,
1499 u8 private_data_len)
1500{
1501 struct cm_id_private *cm_id_priv;
1502 struct ib_mad_send_buf *msg;
a977049d
HR		 1503 unsigned long flags;
1504 void *data;
1505 int ret;
1506
1507 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1508 return -EINVAL;
1509
1510 data = cm_copy_private_data(private_data, private_data_len);
1511 if (IS_ERR(data))
1512 return PTR_ERR(data);
1513
1514 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1515 spin_lock_irqsave(&cm_id_priv->lock, flags);
1516 if (cm_id->state != IB_CM_REP_RCVD &&
1517 cm_id->state != IB_CM_MRA_REP_SENT) {
1518 ret = -EINVAL;
1519 goto error;
1520 }
1521
1522 ret = cm_alloc_msg(cm_id_priv, &msg);
1523 if (ret)
1524 goto error;
1525
1526 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1527 private_data, private_data_len);
1528
34816ad9 1529 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1530 if (ret) {
1531 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1532 cm_free_msg(msg);
1533 kfree(data);
1534 return ret;
1535 }
1536
1537 cm_id->state = IB_CM_ESTABLISHED;
1538 cm_set_private_data(cm_id_priv, data, private_data_len);
1539 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1540 return 0;
1541
1542error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1543 kfree(data);
1544 return ret;
1545}
1546EXPORT_SYMBOL(ib_send_cm_rtu);
1547
1548static void cm_format_rep_event(struct cm_work *work)
1549{
1550 struct cm_rep_msg *rep_msg;
1551 struct ib_cm_rep_event_param *param;
1552
1553 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1554 param = &work->cm_event.param.rep_rcvd;
1555 param->remote_ca_guid = rep_msg->local_ca_guid;
1556 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1557 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1558 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1559 param->responder_resources = rep_msg->initiator_depth;
1560 param->initiator_depth = rep_msg->resp_resources;
1561 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1562 param->failover_accepted = cm_rep_get_failover(rep_msg);
1563 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1564 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1565 param->srq = cm_rep_get_srq(rep_msg);
1566 work->cm_event.private_data = &rep_msg->private_data;
1567}
1568
1569static void cm_dup_rep_handler(struct cm_work *work)
1570{
1571 struct cm_id_private *cm_id_priv;
1572 struct cm_rep_msg *rep_msg;
1573 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1574 unsigned long flags;
1575 int ret;
1576
1577 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1578 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1579 rep_msg->local_comm_id);
1580 if (!cm_id_priv)
1581 return;
1582
1583 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1584 if (ret)
1585 goto deref;
1586
1587 spin_lock_irqsave(&cm_id_priv->lock, flags);
1588 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1589 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1590 cm_id_priv->private_data,
1591 cm_id_priv->private_data_len);
1592 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1593 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1594 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1595 cm_id_priv->private_data,
1596 cm_id_priv->private_data_len);
1597 else
1598 goto unlock;
1599 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1600
34816ad9 1601 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1602 if (ret)
1603 goto free;
1604 goto deref;
1605
1606unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1607free: cm_free_msg(msg);
1608deref: cm_deref_id(cm_id_priv);
1609}
1610
1611static int cm_rep_handler(struct cm_work *work)
1612{
1613 struct cm_id_private *cm_id_priv;
1614 struct cm_rep_msg *rep_msg;
1615 unsigned long flags;
1616 int ret;
1617
1618 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1619 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1620 if (!cm_id_priv) {
1621 cm_dup_rep_handler(work);
1622 return -EINVAL;
1623 }
1624
87fd1a11
SH		 1625 cm_format_rep_event(work);
1626
1627 spin_lock_irqsave(&cm_id_priv->lock, flags);
1628 switch (cm_id_priv->id.state) {
1629 case IB_CM_REQ_SENT:
1630 case IB_CM_MRA_REQ_RCVD:
1631 break;
1632 default:
1633 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1634 ret = -EINVAL;
1635 goto error;
1636 }
1637
a977049d
HR		 1638 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1639 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1640 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1641
87fd1a11 1642 spin_lock(&cm.lock);
a977049d
HR		 1643 /* Check for duplicate REP. */
1644 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1645 spin_unlock(&cm.lock);
1646 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1647 ret = -EINVAL;
1648 goto error;
1649 }
1650 /* Check for a stale connection. */
1651 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1652 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1653 &cm.remote_id_table);
1654 cm_id_priv->timewait_info->inserted_remote_id = 0;
1655 spin_unlock(&cm.lock);
1656 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1657 cm_issue_rej(work->port, work->mad_recv_wc,
1658 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1659 NULL, 0);
1660 ret = -EINVAL;
1661 goto error;
1662 }
87fd1a11 1663 spin_unlock(&cm.lock);
a977049d 1664
a977049d
HR		 1665 cm_id_priv->id.state = IB_CM_REP_RCVD;
1666 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1667 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1668 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1669 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1670 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1671 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1672
1673 /* todo: handle peer_to_peer */
1674
34816ad9 1675 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1676 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1677 if (!ret)
1678 list_add_tail(&work->list, &cm_id_priv->work_list);
1679 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1680
1681 if (ret)
1682 cm_process_work(cm_id_priv, work);
1683 else
1684 cm_deref_id(cm_id_priv);
1685 return 0;
1686
87fd1a11 1687error:
a977049d
HR		 1688 cm_deref_id(cm_id_priv);
1689 return ret;
1690}
1691
1692static int cm_establish_handler(struct cm_work *work)
1693{
1694 struct cm_id_private *cm_id_priv;
1695 unsigned long flags;
1696 int ret;
1697
1698 /* See comment in ib_cm_establish about lookup. */
1699 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1700 if (!cm_id_priv)
1701 return -EINVAL;
1702
1703 spin_lock_irqsave(&cm_id_priv->lock, flags);
1704 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1705 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1706 goto out;
1707 }
1708
34816ad9 1709 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1710 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1711 if (!ret)
1712 list_add_tail(&work->list, &cm_id_priv->work_list);
1713 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1714
1715 if (ret)
1716 cm_process_work(cm_id_priv, work);
1717 else
1718 cm_deref_id(cm_id_priv);
1719 return 0;
1720out:
1721 cm_deref_id(cm_id_priv);
1722 return -EINVAL;
1723}
1724
1725static int cm_rtu_handler(struct cm_work *work)
1726{
1727 struct cm_id_private *cm_id_priv;
1728 struct cm_rtu_msg *rtu_msg;
1729 unsigned long flags;
1730 int ret;
1731
1732 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1733 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1734 rtu_msg->local_comm_id);
1735 if (!cm_id_priv)
1736 return -EINVAL;
1737
1738 work->cm_event.private_data = &rtu_msg->private_data;
1739
1740 spin_lock_irqsave(&cm_id_priv->lock, flags);
1741 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1742 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1743 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1744 goto out;
1745 }
1746 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1747
34816ad9 1748 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1749 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1750 if (!ret)
1751 list_add_tail(&work->list, &cm_id_priv->work_list);
1752 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1753
1754 if (ret)
1755 cm_process_work(cm_id_priv, work);
1756 else
1757 cm_deref_id(cm_id_priv);
1758 return 0;
1759out:
1760 cm_deref_id(cm_id_priv);
1761 return -EINVAL;
1762}
1763
1764static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1765 struct cm_id_private *cm_id_priv,
1766 const void *private_data,
1767 u8 private_data_len)
1768{
1769 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1770 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1771 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1772 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1773 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1774
1775 if (private_data && private_data_len)
1776 memcpy(dreq_msg->private_data, private_data, private_data_len);
1777}
1778
1779int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1780 const void *private_data,
1781 u8 private_data_len)
1782{
1783 struct cm_id_private *cm_id_priv;
1784 struct ib_mad_send_buf *msg;
a977049d
HR		 1785 unsigned long flags;
1786 int ret;
1787
1788 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1789 return -EINVAL;
1790
1791 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1792 spin_lock_irqsave(&cm_id_priv->lock, flags);
1793 if (cm_id->state != IB_CM_ESTABLISHED) {
1794 ret = -EINVAL;
1795 goto out;
1796 }
1797
1798 ret = cm_alloc_msg(cm_id_priv, &msg);
1799 if (ret) {
1800 cm_enter_timewait(cm_id_priv);
1801 goto out;
1802 }
1803
1804 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1805 private_data, private_data_len);
34816ad9 1806 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1807 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1808
34816ad9 1809 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1810 if (ret) {
1811 cm_enter_timewait(cm_id_priv);
1812 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1813 cm_free_msg(msg);
1814 return ret;
1815 }
1816
1817 cm_id->state = IB_CM_DREQ_SENT;
1818 cm_id_priv->msg = msg;
1819out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1820 return ret;
1821}
1822EXPORT_SYMBOL(ib_send_cm_dreq);
1823
1824static void cm_format_drep(struct cm_drep_msg *drep_msg,
1825 struct cm_id_private *cm_id_priv,
1826 const void *private_data,
1827 u8 private_data_len)
1828{
1829 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1830 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1831 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1832
1833 if (private_data && private_data_len)
1834 memcpy(drep_msg->private_data, private_data, private_data_len);
1835}
1836
1837int ib_send_cm_drep(struct ib_cm_id *cm_id,
1838 const void *private_data,
1839 u8 private_data_len)
1840{
1841 struct cm_id_private *cm_id_priv;
1842 struct ib_mad_send_buf *msg;
a977049d
HR		 1843 unsigned long flags;
1844 void *data;
1845 int ret;
1846
1847 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1848 return -EINVAL;
1849
1850 data = cm_copy_private_data(private_data, private_data_len);
1851 if (IS_ERR(data))
1852 return PTR_ERR(data);
1853
1854 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1855 spin_lock_irqsave(&cm_id_priv->lock, flags);
1856 if (cm_id->state != IB_CM_DREQ_RCVD) {
1857 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1858 kfree(data);
1859 return -EINVAL;
1860 }
1861
1862 cm_set_private_data(cm_id_priv, data, private_data_len);
1863 cm_enter_timewait(cm_id_priv);
1864
1865 ret = cm_alloc_msg(cm_id_priv, &msg);
1866 if (ret)
1867 goto out;
1868
1869 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1870 private_data, private_data_len);
1871
34816ad9 1872 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1873 if (ret) {
1874 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1875 cm_free_msg(msg);
1876 return ret;
1877 }
1878
1879out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1880 return ret;
1881}
1882EXPORT_SYMBOL(ib_send_cm_drep);
1883
1884static int cm_dreq_handler(struct cm_work *work)
1885{
1886 struct cm_id_private *cm_id_priv;
1887 struct cm_dreq_msg *dreq_msg;
1888 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1889 unsigned long flags;
1890 int ret;
1891
1892 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1893 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1894 dreq_msg->local_comm_id);
1895 if (!cm_id_priv)
1896 return -EINVAL;
1897
1898 work->cm_event.private_data = &dreq_msg->private_data;
1899
1900 spin_lock_irqsave(&cm_id_priv->lock, flags);
1901 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1902 goto unlock;
1903
1904 switch (cm_id_priv->id.state) {
1905 case IB_CM_REP_SENT:
1906 case IB_CM_DREQ_SENT:
34816ad9 1907 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1908 break;
1909 case IB_CM_ESTABLISHED:
1910 case IB_CM_MRA_REP_RCVD:
1911 break;
1912 case IB_CM_TIMEWAIT:
1913 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1914 goto unlock;
1915
1916 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1917 cm_id_priv->private_data,
1918 cm_id_priv->private_data_len);
1919 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1920
34816ad9 1921 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 1922 cm_free_msg(msg);
1923 goto deref;
1924 default:
1925 goto unlock;
1926 }
1927 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1928 cm_id_priv->tid = dreq_msg->hdr.tid;
1929 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1930 if (!ret)
1931 list_add_tail(&work->list, &cm_id_priv->work_list);
1932 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1933
1934 if (ret)
1935 cm_process_work(cm_id_priv, work);
1936 else
1937 cm_deref_id(cm_id_priv);
1938 return 0;
1939
1940unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1941deref: cm_deref_id(cm_id_priv);
1942 return -EINVAL;
1943}
1944
1945static int cm_drep_handler(struct cm_work *work)
1946{
1947 struct cm_id_private *cm_id_priv;
1948 struct cm_drep_msg *drep_msg;
1949 unsigned long flags;
1950 int ret;
1951
1952 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
1953 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
1954 drep_msg->local_comm_id);
1955 if (!cm_id_priv)
1956 return -EINVAL;
1957
1958 work->cm_event.private_data = &drep_msg->private_data;
1959
1960 spin_lock_irqsave(&cm_id_priv->lock, flags);
1961 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
1962 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
1963 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1964 goto out;
1965 }
1966 cm_enter_timewait(cm_id_priv);
1967
34816ad9 1968 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1969 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1970 if (!ret)
1971 list_add_tail(&work->list, &cm_id_priv->work_list);
1972 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1973
1974 if (ret)
1975 cm_process_work(cm_id_priv, work);
1976 else
1977 cm_deref_id(cm_id_priv);
1978 return 0;
1979out:
1980 cm_deref_id(cm_id_priv);
1981 return -EINVAL;
1982}
1983
1984int ib_send_cm_rej(struct ib_cm_id *cm_id,
1985 enum ib_cm_rej_reason reason,
1986 void *ari,
1987 u8 ari_length,
1988 const void *private_data,
1989 u8 private_data_len)
1990{
1991 struct cm_id_private *cm_id_priv;
1992 struct ib_mad_send_buf *msg;
a977049d
HR		 1993 unsigned long flags;
1994 int ret;
1995
1996 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
1997 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
1998 return -EINVAL;
1999
2000 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2001
2002 spin_lock_irqsave(&cm_id_priv->lock, flags);
2003 switch (cm_id->state) {
2004 case IB_CM_REQ_SENT:
2005 case IB_CM_MRA_REQ_RCVD:
2006 case IB_CM_REQ_RCVD:
2007 case IB_CM_MRA_REQ_SENT:
2008 case IB_CM_REP_RCVD:
2009 case IB_CM_MRA_REP_SENT:
2010 ret = cm_alloc_msg(cm_id_priv, &msg);
2011 if (!ret)
2012 cm_format_rej((struct cm_rej_msg *) msg->mad,
2013 cm_id_priv, reason, ari, ari_length,
2014 private_data, private_data_len);
2015
2016 cm_reset_to_idle(cm_id_priv);
2017 break;
2018 case IB_CM_REP_SENT:
2019 case IB_CM_MRA_REP_RCVD:
2020 ret = cm_alloc_msg(cm_id_priv, &msg);
2021 if (!ret)
2022 cm_format_rej((struct cm_rej_msg *) msg->mad,
2023 cm_id_priv, reason, ari, ari_length,
2024 private_data, private_data_len);
2025
2026 cm_enter_timewait(cm_id_priv);
2027 break;
2028 default:
2029 ret = -EINVAL;
2030 goto out;
2031 }
2032
2033 if (ret)
2034 goto out;
2035
34816ad9 2036 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2037 if (ret)
2038 cm_free_msg(msg);
2039
2040out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2041 return ret;
2042}
2043EXPORT_SYMBOL(ib_send_cm_rej);
2044
2045static void cm_format_rej_event(struct cm_work *work)
2046{
2047 struct cm_rej_msg *rej_msg;
2048 struct ib_cm_rej_event_param *param;
2049
2050 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2051 param = &work->cm_event.param.rej_rcvd;
2052 param->ari = rej_msg->ari;
2053 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 2054 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 2055 work->cm_event.private_data = &rej_msg->private_data;
2056}
2057
2058static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2059{
2060 struct cm_timewait_info *timewait_info;
2061 struct cm_id_private *cm_id_priv;
2062 unsigned long flags;
97f52eb4 2063 __be32 remote_id;
a977049d
HR		 2064
2065 remote_id = rej_msg->local_comm_id;
2066
97f52eb4 2067 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
a977049d 2068 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 2069 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 2070 remote_id);
2071 if (!timewait_info) {
2072 spin_unlock_irqrestore(&cm.lock, flags);
2073 return NULL;
2074 }
2075 cm_id_priv = idr_find(&cm.local_id_table,
97f52eb4 2076 (__force int) timewait_info->work.local_id);
a977049d
HR		 2077 if (cm_id_priv) {
2078 if (cm_id_priv->id.remote_id == remote_id)
2079 atomic_inc(&cm_id_priv->refcount);
2080 else
2081 cm_id_priv = NULL;
2082 }
2083 spin_unlock_irqrestore(&cm.lock, flags);
2084 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2085 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2086 else
2087 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2088
2089 return cm_id_priv;
2090}
2091
2092static int cm_rej_handler(struct cm_work *work)
2093{
2094 struct cm_id_private *cm_id_priv;
2095 struct cm_rej_msg *rej_msg;
2096 unsigned long flags;
2097 int ret;
2098
2099 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2100 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2101 if (!cm_id_priv)
2102 return -EINVAL;
2103
2104 cm_format_rej_event(work);
2105
2106 spin_lock_irqsave(&cm_id_priv->lock, flags);
2107 switch (cm_id_priv->id.state) {
2108 case IB_CM_REQ_SENT:
2109 case IB_CM_MRA_REQ_RCVD:
2110 case IB_CM_REP_SENT:
2111 case IB_CM_MRA_REP_RCVD:
34816ad9 2112 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2113 /* fall through */
2114 case IB_CM_REQ_RCVD:
2115 case IB_CM_MRA_REQ_SENT:
97f52eb4 2116 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2117 cm_enter_timewait(cm_id_priv);
2118 else
2119 cm_reset_to_idle(cm_id_priv);
2120 break;
2121 case IB_CM_DREQ_SENT:
34816ad9 2122 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2123 /* fall through */
2124 case IB_CM_REP_RCVD:
2125 case IB_CM_MRA_REP_SENT:
2126 case IB_CM_ESTABLISHED:
2127 cm_enter_timewait(cm_id_priv);
2128 break;
2129 default:
2130 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2131 ret = -EINVAL;
2132 goto out;
2133 }
2134
2135 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2136 if (!ret)
2137 list_add_tail(&work->list, &cm_id_priv->work_list);
2138 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2139
2140 if (ret)
2141 cm_process_work(cm_id_priv, work);
2142 else
2143 cm_deref_id(cm_id_priv);
2144 return 0;
2145out:
2146 cm_deref_id(cm_id_priv);
2147 return -EINVAL;
2148}
2149
2150int ib_send_cm_mra(struct ib_cm_id *cm_id,
2151 u8 service_timeout,
2152 const void *private_data,
2153 u8 private_data_len)
2154{
2155 struct cm_id_private *cm_id_priv;
2156 struct ib_mad_send_buf *msg;
a977049d
HR		 2157 void *data;
2158 unsigned long flags;
2159 int ret;
2160
2161 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2162 return -EINVAL;
2163
2164 data = cm_copy_private_data(private_data, private_data_len);
2165 if (IS_ERR(data))
2166 return PTR_ERR(data);
2167
2168 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2169
2170 spin_lock_irqsave(&cm_id_priv->lock, flags);
2171 switch(cm_id_priv->id.state) {
2172 case IB_CM_REQ_RCVD:
2173 ret = cm_alloc_msg(cm_id_priv, &msg);
2174 if (ret)
2175 goto error1;
2176
2177 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2178 CM_MSG_RESPONSE_REQ, service_timeout,
2179 private_data, private_data_len);
34816ad9 2180 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2181 if (ret)
2182 goto error2;
2183 cm_id->state = IB_CM_MRA_REQ_SENT;
2184 break;
2185 case IB_CM_REP_RCVD:
2186 ret = cm_alloc_msg(cm_id_priv, &msg);
2187 if (ret)
2188 goto error1;
2189
2190 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2191 CM_MSG_RESPONSE_REP, service_timeout,
2192 private_data, private_data_len);
34816ad9 2193 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2194 if (ret)
2195 goto error2;
2196 cm_id->state = IB_CM_MRA_REP_SENT;
2197 break;
2198 case IB_CM_ESTABLISHED:
2199 ret = cm_alloc_msg(cm_id_priv, &msg);
2200 if (ret)
2201 goto error1;
2202
2203 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2204 CM_MSG_RESPONSE_OTHER, service_timeout,
2205 private_data, private_data_len);
34816ad9 2206 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2207 if (ret)
2208 goto error2;
2209 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2210 break;
2211 default:
2212 ret = -EINVAL;
2213 goto error1;
2214 }
2215 cm_id_priv->service_timeout = service_timeout;
2216 cm_set_private_data(cm_id_priv, data, private_data_len);
2217 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2218 return 0;
2219
2220error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2221 kfree(data);
2222 return ret;
2223
2224error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2225 kfree(data);
2226 cm_free_msg(msg);
2227 return ret;
2228}
2229EXPORT_SYMBOL(ib_send_cm_mra);
2230
2231static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2232{
2233 switch (cm_mra_get_msg_mraed(mra_msg)) {
2234 case CM_MSG_RESPONSE_REQ:
2235 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2236 case CM_MSG_RESPONSE_REP:
2237 case CM_MSG_RESPONSE_OTHER:
2238 return cm_acquire_id(mra_msg->remote_comm_id,
2239 mra_msg->local_comm_id);
2240 default:
2241 return NULL;
2242 }
2243}
2244
2245static int cm_mra_handler(struct cm_work *work)
2246{
2247 struct cm_id_private *cm_id_priv;
2248 struct cm_mra_msg *mra_msg;
2249 unsigned long flags;
2250 int timeout, ret;
2251
2252 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2253 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2254 if (!cm_id_priv)
2255 return -EINVAL;
2256
2257 work->cm_event.private_data = &mra_msg->private_data;
2258 work->cm_event.param.mra_rcvd.service_timeout =
2259 cm_mra_get_service_timeout(mra_msg);
2260 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2261 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2262
2263 spin_lock_irqsave(&cm_id_priv->lock, flags);
2264 switch (cm_id_priv->id.state) {
2265 case IB_CM_REQ_SENT:
2266 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2267 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2268 cm_id_priv->msg, timeout))
a977049d
HR		 2269 goto out;
2270 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2271 break;
2272 case IB_CM_REP_SENT:
2273 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2274 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2275 cm_id_priv->msg, timeout))
a977049d
HR		 2276 goto out;
2277 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2278 break;
2279 case IB_CM_ESTABLISHED:
2280 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2281 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2282 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2283 cm_id_priv->msg, timeout))
a977049d
HR		 2284 goto out;
2285 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2286 break;
2287 default:
2288 goto out;
2289 }
2290
2291 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2292 cm_id_priv->id.state;
2293 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2294 if (!ret)
2295 list_add_tail(&work->list, &cm_id_priv->work_list);
2296 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2297
2298 if (ret)
2299 cm_process_work(cm_id_priv, work);
2300 else
2301 cm_deref_id(cm_id_priv);
2302 return 0;
2303out:
2304 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2305 cm_deref_id(cm_id_priv);
2306 return -EINVAL;
2307}
2308
2309static void cm_format_lap(struct cm_lap_msg *lap_msg,
2310 struct cm_id_private *cm_id_priv,
2311 struct ib_sa_path_rec *alternate_path,
2312 const void *private_data,
2313 u8 private_data_len)
2314{
2315 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2316 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2317 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2318 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2319 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2320 /* todo: need remote CM response timeout */
2321 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2322 lap_msg->alt_local_lid = alternate_path->slid;
2323 lap_msg->alt_remote_lid = alternate_path->dlid;
2324 lap_msg->alt_local_gid = alternate_path->sgid;
2325 lap_msg->alt_remote_gid = alternate_path->dgid;
2326 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2327 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2328 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2329 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2330 cm_lap_set_sl(lap_msg, alternate_path->sl);
2331 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2332 cm_lap_set_local_ack_timeout(lap_msg,
2333 min(31, alternate_path->packet_life_time + 1));
2334
2335 if (private_data && private_data_len)
2336 memcpy(lap_msg->private_data, private_data, private_data_len);
2337}
2338
2339int ib_send_cm_lap(struct ib_cm_id *cm_id,
2340 struct ib_sa_path_rec *alternate_path,
2341 const void *private_data,
2342 u8 private_data_len)
2343{
2344 struct cm_id_private *cm_id_priv;
2345 struct ib_mad_send_buf *msg;
a977049d
HR		 2346 unsigned long flags;
2347 int ret;
2348
2349 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2350 return -EINVAL;
2351
2352 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2353 spin_lock_irqsave(&cm_id_priv->lock, flags);
2354 if (cm_id->state != IB_CM_ESTABLISHED ||
2355 cm_id->lap_state != IB_CM_LAP_IDLE) {
2356 ret = -EINVAL;
2357 goto out;
2358 }
2359
2360 ret = cm_alloc_msg(cm_id_priv, &msg);
2361 if (ret)
2362 goto out;
2363
2364 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2365 alternate_path, private_data, private_data_len);
34816ad9 2366 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2367 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2368
34816ad9 2369 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2370 if (ret) {
2371 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2372 cm_free_msg(msg);
2373 return ret;
2374 }
2375
2376 cm_id->lap_state = IB_CM_LAP_SENT;
2377 cm_id_priv->msg = msg;
2378
2379out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2380 return ret;
2381}
2382EXPORT_SYMBOL(ib_send_cm_lap);
2383
2384static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2385 struct cm_lap_msg *lap_msg)
2386{
2387 memset(path, 0, sizeof *path);
2388 path->dgid = lap_msg->alt_local_gid;
2389 path->sgid = lap_msg->alt_remote_gid;
2390 path->dlid = lap_msg->alt_local_lid;
2391 path->slid = lap_msg->alt_remote_lid;
2392 path->flow_label = cm_lap_get_flow_label(lap_msg);
2393 path->hop_limit = lap_msg->alt_hop_limit;
2394 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2395 path->reversible = 1;
2396 /* pkey is same as in REQ */
2397 path->sl = cm_lap_get_sl(lap_msg);
2398 path->mtu_selector = IB_SA_EQ;
2399 /* mtu is same as in REQ */
2400 path->rate_selector = IB_SA_EQ;
2401 path->rate = cm_lap_get_packet_rate(lap_msg);
2402 path->packet_life_time_selector = IB_SA_EQ;
2403 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2404 path->packet_life_time -= (path->packet_life_time > 0);
2405}
2406
2407static int cm_lap_handler(struct cm_work *work)
2408{
2409 struct cm_id_private *cm_id_priv;
2410 struct cm_lap_msg *lap_msg;
2411 struct ib_cm_lap_event_param *param;
2412 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2413 unsigned long flags;
2414 int ret;
2415
2416 /* todo: verify LAP request and send reject APR if invalid. */
2417 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2418 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2419 lap_msg->local_comm_id);
2420 if (!cm_id_priv)
2421 return -EINVAL;
2422
2423 param = &work->cm_event.param.lap_rcvd;
2424 param->alternate_path = &work->path[0];
2425 cm_format_path_from_lap(param->alternate_path, lap_msg);
2426 work->cm_event.private_data = &lap_msg->private_data;
2427
2428 spin_lock_irqsave(&cm_id_priv->lock, flags);
2429 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2430 goto unlock;
2431
2432 switch (cm_id_priv->id.lap_state) {
2433 case IB_CM_LAP_IDLE:
2434 break;
2435 case IB_CM_MRA_LAP_SENT:
2436 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2437 goto unlock;
2438
2439 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2440 CM_MSG_RESPONSE_OTHER,
2441 cm_id_priv->service_timeout,
2442 cm_id_priv->private_data,
2443 cm_id_priv->private_data_len);
2444 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2445
34816ad9 2446 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2447 cm_free_msg(msg);
2448 goto deref;
2449 default:
2450 goto unlock;
2451 }
2452
2453 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2454 cm_id_priv->tid = lap_msg->hdr.tid;
2455 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2456 if (!ret)
2457 list_add_tail(&work->list, &cm_id_priv->work_list);
2458 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2459
2460 if (ret)
2461 cm_process_work(cm_id_priv, work);
2462 else
2463 cm_deref_id(cm_id_priv);
2464 return 0;
2465
2466unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2467deref: cm_deref_id(cm_id_priv);
2468 return -EINVAL;
2469}
2470
2471static void cm_format_apr(struct cm_apr_msg *apr_msg,
2472 struct cm_id_private *cm_id_priv,
2473 enum ib_cm_apr_status status,
2474 void *info,
2475 u8 info_length,
2476 const void *private_data,
2477 u8 private_data_len)
2478{
2479 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2480 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2481 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2482 apr_msg->ap_status = (u8) status;
2483
2484 if (info && info_length) {
2485 apr_msg->info_length = info_length;
2486 memcpy(apr_msg->info, info, info_length);
2487 }
2488
2489 if (private_data && private_data_len)
2490 memcpy(apr_msg->private_data, private_data, private_data_len);
2491}
2492
2493int ib_send_cm_apr(struct ib_cm_id *cm_id,
2494 enum ib_cm_apr_status status,
2495 void *info,
2496 u8 info_length,
2497 const void *private_data,
2498 u8 private_data_len)
2499{
2500 struct cm_id_private *cm_id_priv;
2501 struct ib_mad_send_buf *msg;
a977049d
HR		 2502 unsigned long flags;
2503 int ret;
2504
2505 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2506 (info && info_length > IB_CM_APR_INFO_LENGTH))
2507 return -EINVAL;
2508
2509 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2510 spin_lock_irqsave(&cm_id_priv->lock, flags);
2511 if (cm_id->state != IB_CM_ESTABLISHED ||
2512 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2513 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2514 ret = -EINVAL;
2515 goto out;
2516 }
2517
2518 ret = cm_alloc_msg(cm_id_priv, &msg);
2519 if (ret)
2520 goto out;
2521
2522 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2523 info, info_length, private_data, private_data_len);
34816ad9 2524 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2525 if (ret) {
2526 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2527 cm_free_msg(msg);
2528 return ret;
2529 }
2530
2531 cm_id->lap_state = IB_CM_LAP_IDLE;
2532out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2533 return ret;
2534}
2535EXPORT_SYMBOL(ib_send_cm_apr);
2536
2537static int cm_apr_handler(struct cm_work *work)
2538{
2539 struct cm_id_private *cm_id_priv;
2540 struct cm_apr_msg *apr_msg;
2541 unsigned long flags;
2542 int ret;
2543
2544 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2545 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2546 apr_msg->local_comm_id);
2547 if (!cm_id_priv)
2548 return -EINVAL; /* Unmatched reply. */
2549
2550 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2551 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2552 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2553 work->cm_event.private_data = &apr_msg->private_data;
2554
2555 spin_lock_irqsave(&cm_id_priv->lock, flags);
2556 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2557 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2558 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2559 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2560 goto out;
2561 }
2562 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
34816ad9 2563 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2564 cm_id_priv->msg = NULL;
2565
2566 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2567 if (!ret)
2568 list_add_tail(&work->list, &cm_id_priv->work_list);
2569 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2570
2571 if (ret)
2572 cm_process_work(cm_id_priv, work);
2573 else
2574 cm_deref_id(cm_id_priv);
2575 return 0;
2576out:
2577 cm_deref_id(cm_id_priv);
2578 return -EINVAL;
2579}
2580
2581static int cm_timewait_handler(struct cm_work *work)
2582{
2583 struct cm_timewait_info *timewait_info;
2584 struct cm_id_private *cm_id_priv;
2585 unsigned long flags;
2586 int ret;
2587
2588 timewait_info = (struct cm_timewait_info *)work;
2589 cm_cleanup_timewait(timewait_info);
2590
2591 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2592 timewait_info->work.remote_id);
2593 if (!cm_id_priv)
2594 return -EINVAL;
2595
2596 spin_lock_irqsave(&cm_id_priv->lock, flags);
2597 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2598 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2599 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2600 goto out;
2601 }
2602 cm_id_priv->id.state = IB_CM_IDLE;
2603 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2604 if (!ret)
2605 list_add_tail(&work->list, &cm_id_priv->work_list);
2606 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2607
2608 if (ret)
2609 cm_process_work(cm_id_priv, work);
2610 else
2611 cm_deref_id(cm_id_priv);
2612 return 0;
2613out:
2614 cm_deref_id(cm_id_priv);
2615 return -EINVAL;
2616}
2617
2618static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2619 struct cm_id_private *cm_id_priv,
2620 struct ib_cm_sidr_req_param *param)
2621{
2622 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2623 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2624 sidr_req_msg->request_id = cm_id_priv->id.local_id;
75af9088 2625 sidr_req_msg->pkey = cpu_to_be16(param->path->pkey);
a977049d
HR		 2626 sidr_req_msg->service_id = param->service_id;
2627
2628 if (param->private_data && param->private_data_len)
2629 memcpy(sidr_req_msg->private_data, param->private_data,
2630 param->private_data_len);
2631}
2632
2633int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2634 struct ib_cm_sidr_req_param *param)
2635{
2636 struct cm_id_private *cm_id_priv;
2637 struct ib_mad_send_buf *msg;
a977049d
HR		 2638 unsigned long flags;
2639 int ret;
2640
2641 if (!param->path || (param->private_data &&
2642 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2643 return -EINVAL;
2644
2645 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2646 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2647 if (ret)
2648 goto out;
2649
2650 cm_id->service_id = param->service_id;
97f52eb4 2651 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2652 cm_id_priv->timeout_ms = param->timeout_ms;
2653 cm_id_priv->max_cm_retries = param->max_cm_retries;
2654 ret = cm_alloc_msg(cm_id_priv, &msg);
2655 if (ret)
2656 goto out;
2657
2658 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2659 param);
34816ad9 2660 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2661 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2662
2663 spin_lock_irqsave(&cm_id_priv->lock, flags);
2664 if (cm_id->state == IB_CM_IDLE)
34816ad9 2665 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2666 else
2667 ret = -EINVAL;
2668
2669 if (ret) {
2670 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2671 cm_free_msg(msg);
2672 goto out;
2673 }
2674 cm_id->state = IB_CM_SIDR_REQ_SENT;
2675 cm_id_priv->msg = msg;
2676 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2677out:
2678 return ret;
2679}
2680EXPORT_SYMBOL(ib_send_cm_sidr_req);
2681
2682static void cm_format_sidr_req_event(struct cm_work *work,
2683 struct ib_cm_id *listen_id)
2684{
2685 struct cm_sidr_req_msg *sidr_req_msg;
2686 struct ib_cm_sidr_req_event_param *param;
2687
2688 sidr_req_msg = (struct cm_sidr_req_msg *)
2689 work->mad_recv_wc->recv_buf.mad;
2690 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 2691 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 2692 param->listen_id = listen_id;
a977049d
HR		 2693 param->port = work->port->port_num;
2694 work->cm_event.private_data = &sidr_req_msg->private_data;
2695}
2696
2697static int cm_sidr_req_handler(struct cm_work *work)
2698{
2699 struct ib_cm_id *cm_id;
2700 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2701 struct cm_sidr_req_msg *sidr_req_msg;
2702 struct ib_wc *wc;
2703 unsigned long flags;
2704
07d357d0 2705 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 2706 if (IS_ERR(cm_id))
2707 return PTR_ERR(cm_id);
2708 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2709
2710 /* Record SGID/SLID and request ID for lookup. */
2711 sidr_req_msg = (struct cm_sidr_req_msg *)
2712 work->mad_recv_wc->recv_buf.mad;
2713 wc = work->mad_recv_wc->wc;
97f52eb4 2714 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 2715 cm_id_priv->av.dgid.global.interface_id = 0;
2716 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 2717 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 2718 &cm_id_priv->av);
2719 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2720 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2721 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2722 atomic_inc(&cm_id_priv->work_count);
2723
2724 spin_lock_irqsave(&cm.lock, flags);
2725 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2726 if (cur_cm_id_priv) {
2727 spin_unlock_irqrestore(&cm.lock, flags);
2728 goto out; /* Duplicate message. */
2729 }
07d357d0 2730 cur_cm_id_priv = cm_find_listen(cm_id->device,
6e61d04f
SH		 2731 sidr_req_msg->service_id,
2732 sidr_req_msg->private_data);
a977049d
HR		 2733 if (!cur_cm_id_priv) {
2734 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2735 spin_unlock_irqrestore(&cm.lock, flags);
2736 /* todo: reply with no match */
2737 goto out; /* No match. */
2738 }
2739 atomic_inc(&cur_cm_id_priv->refcount);
2740 spin_unlock_irqrestore(&cm.lock, flags);
2741
2742 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2743 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2744 cm_id_priv->id.service_id = sidr_req_msg->service_id;
97f52eb4 2745 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2746
2747 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2748 cm_process_work(cm_id_priv, work);
2749 cm_deref_id(cur_cm_id_priv);
2750 return 0;
2751out:
2752 ib_destroy_cm_id(&cm_id_priv->id);
2753 return -EINVAL;
2754}
2755
2756static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2757 struct cm_id_private *cm_id_priv,
2758 struct ib_cm_sidr_rep_param *param)
2759{
2760 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2761 cm_id_priv->tid);
2762 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2763 sidr_rep_msg->status = param->status;
2764 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2765 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2766 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2767
2768 if (param->info && param->info_length)
2769 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2770
2771 if (param->private_data && param->private_data_len)
2772 memcpy(sidr_rep_msg->private_data, param->private_data,
2773 param->private_data_len);
2774}
2775
2776int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2777 struct ib_cm_sidr_rep_param *param)
2778{
2779 struct cm_id_private *cm_id_priv;
2780 struct ib_mad_send_buf *msg;
a977049d
HR		 2781 unsigned long flags;
2782 int ret;
2783
2784 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2785 (param->private_data &&
2786 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2787 return -EINVAL;
2788
2789 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2790 spin_lock_irqsave(&cm_id_priv->lock, flags);
2791 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2792 ret = -EINVAL;
2793 goto error;
2794 }
2795
2796 ret = cm_alloc_msg(cm_id_priv, &msg);
2797 if (ret)
2798 goto error;
2799
2800 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2801 param);
34816ad9 2802 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2803 if (ret) {
2804 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2805 cm_free_msg(msg);
2806 return ret;
2807 }
2808 cm_id->state = IB_CM_IDLE;
2809 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2810
2811 spin_lock_irqsave(&cm.lock, flags);
2812 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2813 spin_unlock_irqrestore(&cm.lock, flags);
2814 return 0;
2815
2816error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2817 return ret;
2818}
2819EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2820
2821static void cm_format_sidr_rep_event(struct cm_work *work)
2822{
2823 struct cm_sidr_rep_msg *sidr_rep_msg;
2824 struct ib_cm_sidr_rep_event_param *param;
2825
2826 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2827 work->mad_recv_wc->recv_buf.mad;
2828 param = &work->cm_event.param.sidr_rep_rcvd;
2829 param->status = sidr_rep_msg->status;
2830 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2831 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2832 param->info = &sidr_rep_msg->info;
2833 param->info_len = sidr_rep_msg->info_length;
2834 work->cm_event.private_data = &sidr_rep_msg->private_data;
2835}
2836
2837static int cm_sidr_rep_handler(struct cm_work *work)
2838{
2839 struct cm_sidr_rep_msg *sidr_rep_msg;
2840 struct cm_id_private *cm_id_priv;
2841 unsigned long flags;
2842
2843 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2844 work->mad_recv_wc->recv_buf.mad;
2845 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2846 if (!cm_id_priv)
2847 return -EINVAL; /* Unmatched reply. */
2848
2849 spin_lock_irqsave(&cm_id_priv->lock, flags);
2850 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2851 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2852 goto out;
2853 }
2854 cm_id_priv->id.state = IB_CM_IDLE;
34816ad9 2855 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2856 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2857
2858 cm_format_sidr_rep_event(work);
2859 cm_process_work(cm_id_priv, work);
2860 return 0;
2861out:
2862 cm_deref_id(cm_id_priv);
2863 return -EINVAL;
2864}
2865
2866static void cm_process_send_error(struct ib_mad_send_buf *msg,
2867 enum ib_wc_status wc_status)
2868{
2869 struct cm_id_private *cm_id_priv;
2870 struct ib_cm_event cm_event;
2871 enum ib_cm_state state;
2872 unsigned long flags;
2873 int ret;
2874
2875 memset(&cm_event, 0, sizeof cm_event);
2876 cm_id_priv = msg->context[0];
2877
2878 /* Discard old sends or ones without a response. */
2879 spin_lock_irqsave(&cm_id_priv->lock, flags);
2880 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2881 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2882 goto discard;
2883
2884 switch (state) {
2885 case IB_CM_REQ_SENT:
2886 case IB_CM_MRA_REQ_RCVD:
2887 cm_reset_to_idle(cm_id_priv);
2888 cm_event.event = IB_CM_REQ_ERROR;
2889 break;
2890 case IB_CM_REP_SENT:
2891 case IB_CM_MRA_REP_RCVD:
2892 cm_reset_to_idle(cm_id_priv);
2893 cm_event.event = IB_CM_REP_ERROR;
2894 break;
2895 case IB_CM_DREQ_SENT:
2896 cm_enter_timewait(cm_id_priv);
2897 cm_event.event = IB_CM_DREQ_ERROR;
2898 break;
2899 case IB_CM_SIDR_REQ_SENT:
2900 cm_id_priv->id.state = IB_CM_IDLE;
2901 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2902 break;
2903 default:
2904 goto discard;
2905 }
2906 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2907 cm_event.param.send_status = wc_status;
2908
2909 /* No other events can occur on the cm_id at this point. */
2910 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2911 cm_free_msg(msg);
2912 if (ret)
2913 ib_destroy_cm_id(&cm_id_priv->id);
2914 return;
2915discard:
2916 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2917 cm_free_msg(msg);
2918}
2919
2920static void cm_send_handler(struct ib_mad_agent *mad_agent,
2921 struct ib_mad_send_wc *mad_send_wc)
2922{
34816ad9 2923 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
a977049d
HR		 2924
2925 switch (mad_send_wc->status) {
2926 case IB_WC_SUCCESS:
2927 case IB_WC_WR_FLUSH_ERR:
2928 cm_free_msg(msg);
2929 break;
2930 default:
2931 if (msg->context[0] && msg->context[1])
2932 cm_process_send_error(msg, mad_send_wc->status);
2933 else
2934 cm_free_msg(msg);
2935 break;
2936 }
2937}
2938
2939static void cm_work_handler(void *data)
2940{
2941 struct cm_work *work = data;
2942 int ret;
2943
2944 switch (work->cm_event.event) {
2945 case IB_CM_REQ_RECEIVED:
2946 ret = cm_req_handler(work);
2947 break;
2948 case IB_CM_MRA_RECEIVED:
2949 ret = cm_mra_handler(work);
2950 break;
2951 case IB_CM_REJ_RECEIVED:
2952 ret = cm_rej_handler(work);
2953 break;
2954 case IB_CM_REP_RECEIVED:
2955 ret = cm_rep_handler(work);
2956 break;
2957 case IB_CM_RTU_RECEIVED:
2958 ret = cm_rtu_handler(work);
2959 break;
2960 case IB_CM_USER_ESTABLISHED:
2961 ret = cm_establish_handler(work);
2962 break;
2963 case IB_CM_DREQ_RECEIVED:
2964 ret = cm_dreq_handler(work);
2965 break;
2966 case IB_CM_DREP_RECEIVED:
2967 ret = cm_drep_handler(work);
2968 break;
2969 case IB_CM_SIDR_REQ_RECEIVED:
2970 ret = cm_sidr_req_handler(work);
2971 break;
2972 case IB_CM_SIDR_REP_RECEIVED:
2973 ret = cm_sidr_rep_handler(work);
2974 break;
2975 case IB_CM_LAP_RECEIVED:
2976 ret = cm_lap_handler(work);
2977 break;
2978 case IB_CM_APR_RECEIVED:
2979 ret = cm_apr_handler(work);
2980 break;
2981 case IB_CM_TIMEWAIT_EXIT:
2982 ret = cm_timewait_handler(work);
2983 break;
2984 default:
2985 ret = -EINVAL;
2986 break;
2987 }
2988 if (ret)
2989 cm_free_work(work);
2990}
2991
2992int ib_cm_establish(struct ib_cm_id *cm_id)
2993{
2994 struct cm_id_private *cm_id_priv;
2995 struct cm_work *work;
2996 unsigned long flags;
2997 int ret = 0;
2998
2999 work = kmalloc(sizeof *work, GFP_ATOMIC);
3000 if (!work)
3001 return -ENOMEM;
3002
3003 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3004 spin_lock_irqsave(&cm_id_priv->lock, flags);
3005 switch (cm_id->state)
3006 {
3007 case IB_CM_REP_SENT:
3008 case IB_CM_MRA_REP_RCVD:
3009 cm_id->state = IB_CM_ESTABLISHED;
3010 break;
3011 case IB_CM_ESTABLISHED:
3012 ret = -EISCONN;
3013 break;
3014 default:
3015 ret = -EINVAL;
3016 break;
3017 }
3018 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3019
3020 if (ret) {
3021 kfree(work);
3022 goto out;
3023 }
3024
3025 /*
3026 * The CM worker thread may try to destroy the cm_id before it
3027 * can execute this work item. To prevent potential deadlock,
3028 * we need to find the cm_id once we're in the context of the
3029 * worker thread, rather than holding a reference on it.
3030 */
3031 INIT_WORK(&work->work, cm_work_handler, work);
3032 work->local_id = cm_id->local_id;
3033 work->remote_id = cm_id->remote_id;
3034 work->mad_recv_wc = NULL;
3035 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3036 queue_work(cm.wq, &work->work);
3037out:
3038 return ret;
3039}
3040EXPORT_SYMBOL(ib_cm_establish);
3041
3042static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3043 struct ib_mad_recv_wc *mad_recv_wc)
3044{
3045 struct cm_work *work;
3046 enum ib_cm_event_type event;
3047 int paths = 0;
3048
3049 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3050 case CM_REQ_ATTR_ID:
3051 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3052 alt_local_lid != 0);
3053 event = IB_CM_REQ_RECEIVED;
3054 break;
3055 case CM_MRA_ATTR_ID:
3056 event = IB_CM_MRA_RECEIVED;
3057 break;
3058 case CM_REJ_ATTR_ID:
3059 event = IB_CM_REJ_RECEIVED;
3060 break;
3061 case CM_REP_ATTR_ID:
3062 event = IB_CM_REP_RECEIVED;
3063 break;
3064 case CM_RTU_ATTR_ID:
3065 event = IB_CM_RTU_RECEIVED;
3066 break;
3067 case CM_DREQ_ATTR_ID:
3068 event = IB_CM_DREQ_RECEIVED;
3069 break;
3070 case CM_DREP_ATTR_ID:
3071 event = IB_CM_DREP_RECEIVED;
3072 break;
3073 case CM_SIDR_REQ_ATTR_ID:
3074 event = IB_CM_SIDR_REQ_RECEIVED;
3075 break;
3076 case CM_SIDR_REP_ATTR_ID:
3077 event = IB_CM_SIDR_REP_RECEIVED;
3078 break;
3079 case CM_LAP_ATTR_ID:
3080 paths = 1;
3081 event = IB_CM_LAP_RECEIVED;
3082 break;
3083 case CM_APR_ATTR_ID:
3084 event = IB_CM_APR_RECEIVED;
3085 break;
3086 default:
3087 ib_free_recv_mad(mad_recv_wc);
3088 return;
3089 }
3090
3091 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3092 GFP_KERNEL);
3093 if (!work) {
3094 ib_free_recv_mad(mad_recv_wc);
3095 return;
3096 }
3097
3098 INIT_WORK(&work->work, cm_work_handler, work);
3099 work->cm_event.event = event;
3100 work->mad_recv_wc = mad_recv_wc;
3101 work->port = (struct cm_port *)mad_agent->context;
3102 queue_work(cm.wq, &work->work);
3103}
3104
3105static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3106 struct ib_qp_attr *qp_attr,
3107 int *qp_attr_mask)
3108{
3109 unsigned long flags;
3110 int ret;
3111
3112 spin_lock_irqsave(&cm_id_priv->lock, flags);
3113 switch (cm_id_priv->id.state) {
3114 case IB_CM_REQ_SENT:
3115 case IB_CM_MRA_REQ_RCVD:
3116 case IB_CM_REQ_RCVD:
3117 case IB_CM_MRA_REQ_SENT:
3118 case IB_CM_REP_RCVD:
3119 case IB_CM_MRA_REP_SENT:
3120 case IB_CM_REP_SENT:
3121 case IB_CM_MRA_REP_RCVD:
3122 case IB_CM_ESTABLISHED:
3123 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3124 IB_QP_PKEY_INDEX | IB_QP_PORT;
ae7971a7
SH		 3125 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE |
3126 IB_ACCESS_REMOTE_WRITE;
a977049d 3127 if (cm_id_priv->responder_resources)
ae7971a7 3128 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ;
a977049d
HR		 3129 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3130 qp_attr->port_num = cm_id_priv->av.port->port_num;
3131 ret = 0;
3132 break;
3133 default:
3134 ret = -EINVAL;
3135 break;
3136 }
3137 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3138 return ret;
3139}
3140
3141static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3142 struct ib_qp_attr *qp_attr,
3143 int *qp_attr_mask)
3144{
3145 unsigned long flags;
3146 int ret;
3147
3148 spin_lock_irqsave(&cm_id_priv->lock, flags);
3149 switch (cm_id_priv->id.state) {
3150 case IB_CM_REQ_RCVD:
3151 case IB_CM_MRA_REQ_SENT:
3152 case IB_CM_REP_RCVD:
3153 case IB_CM_MRA_REP_SENT:
3154 case IB_CM_REP_SENT:
3155 case IB_CM_MRA_REP_RCVD:
3156 case IB_CM_ESTABLISHED:
3157 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 3158 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d
HR		 3159 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3160 qp_attr->path_mtu = cm_id_priv->path_mtu;
3161 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3162 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
ae7971a7
SH		 3163 if (cm_id_priv->qp_type == IB_QPT_RC) {
3164 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3165 IB_QP_MIN_RNR_TIMER;
3166 qp_attr->max_dest_rd_atomic =
3167 cm_id_priv->responder_resources;
3168 qp_attr->min_rnr_timer = 0;
3169 }
a977049d
HR		 3170 if (cm_id_priv->alt_av.ah_attr.dlid) {
3171 *qp_attr_mask |= IB_QP_ALT_PATH;
0d8fdfd7 3172 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
a977049d
HR		 3173 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3174 }
3175 ret = 0;
3176 break;
3177 default:
3178 ret = -EINVAL;
3179 break;
3180 }
3181 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3182 return ret;
3183}
3184
3185static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3186 struct ib_qp_attr *qp_attr,
3187 int *qp_attr_mask)
3188{
3189 unsigned long flags;
3190 int ret;
3191
3192 spin_lock_irqsave(&cm_id_priv->lock, flags);
3193 switch (cm_id_priv->id.state) {
3194 case IB_CM_REP_RCVD:
3195 case IB_CM_MRA_REP_SENT:
3196 case IB_CM_REP_SENT:
3197 case IB_CM_MRA_REP_RCVD:
3198 case IB_CM_ESTABLISHED:
ae7971a7 3199 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
a977049d 3200 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
ae7971a7
SH		 3201 if (cm_id_priv->qp_type == IB_QPT_RC) {
3202 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3203 IB_QP_RNR_RETRY |
3204 IB_QP_MAX_QP_RD_ATOMIC;
3205 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3206 qp_attr->retry_cnt = cm_id_priv->retry_count;
3207 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3208 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3209 }
a977049d
HR		 3210 if (cm_id_priv->alt_av.ah_attr.dlid) {
3211 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3212 qp_attr->path_mig_state = IB_MIG_REARM;
3213 }
3214 ret = 0;
3215 break;
3216 default:
3217 ret = -EINVAL;
3218 break;
3219 }
3220 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3221 return ret;
3222}
3223
3224int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3225 struct ib_qp_attr *qp_attr,
3226 int *qp_attr_mask)
3227{
3228 struct cm_id_private *cm_id_priv;
3229 int ret;
3230
3231 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3232 switch (qp_attr->qp_state) {
3233 case IB_QPS_INIT:
3234 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3235 break;
3236 case IB_QPS_RTR:
3237 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3238 break;
3239 case IB_QPS_RTS:
3240 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3241 break;
3242 default:
3243 ret = -EINVAL;
3244 break;
3245 }
3246 return ret;
3247}
3248EXPORT_SYMBOL(ib_cm_init_qp_attr);
3249
a977049d
HR		 3250static void cm_add_one(struct ib_device *device)
3251{
3252 struct cm_device *cm_dev;
3253 struct cm_port *port;
3254 struct ib_mad_reg_req reg_req = {
3255 .mgmt_class = IB_MGMT_CLASS_CM,
3256 .mgmt_class_version = IB_CM_CLASS_VERSION
3257 };
3258 struct ib_port_modify port_modify = {
3259 .set_port_cap_mask = IB_PORT_CM_SUP
3260 };
3261 unsigned long flags;
3262 int ret;
3263 u8 i;
3264
3265 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3266 device->phys_port_cnt, GFP_KERNEL);
3267 if (!cm_dev)
3268 return;
3269
3270 cm_dev->device = device;
cf311cd4 3271 cm_dev->ca_guid = device->node_guid;
a977049d
HR		 3272
3273 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3274 for (i = 1; i <= device->phys_port_cnt; i++) {
3275 port = &cm_dev->port[i-1];
3276 port->cm_dev = cm_dev;
3277 port->port_num = i;
3278 port->mad_agent = ib_register_mad_agent(device, i,
3279 IB_QPT_GSI,
3280 &reg_req,
3281 0,
3282 cm_send_handler,
3283 cm_recv_handler,
3284 port);
3285 if (IS_ERR(port->mad_agent))
cf311cd4 3286 goto error1;
a977049d
HR		 3287
3288 ret = ib_modify_port(device, i, 0, &port_modify);
3289 if (ret)
cf311cd4 3290 goto error2;
a977049d
HR		 3291 }
3292 ib_set_client_data(device, &cm_client, cm_dev);
3293
3294 write_lock_irqsave(&cm.device_lock, flags);
3295 list_add_tail(&cm_dev->list, &cm.device_list);
3296 write_unlock_irqrestore(&cm.device_lock, flags);
3297 return;
3298
a977049d 3299error2:
cf311cd4
SH		 3300 ib_unregister_mad_agent(port->mad_agent);
3301error1:
a977049d
HR		 3302 port_modify.set_port_cap_mask = 0;
3303 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3304 while (--i) {
3305 port = &cm_dev->port[i-1];
3306 ib_modify_port(device, port->port_num, 0, &port_modify);
3307 ib_unregister_mad_agent(port->mad_agent);
3308 }
a977049d
HR		 3309 kfree(cm_dev);
3310}
3311
3312static void cm_remove_one(struct ib_device *device)
3313{
3314 struct cm_device *cm_dev;
3315 struct cm_port *port;
3316 struct ib_port_modify port_modify = {
3317 .clr_port_cap_mask = IB_PORT_CM_SUP
3318 };
3319 unsigned long flags;
3320 int i;
3321
3322 cm_dev = ib_get_client_data(device, &cm_client);
3323 if (!cm_dev)
3324 return;
3325
3326 write_lock_irqsave(&cm.device_lock, flags);
3327 list_del(&cm_dev->list);
3328 write_unlock_irqrestore(&cm.device_lock, flags);
3329
3330 for (i = 1; i <= device->phys_port_cnt; i++) {
3331 port = &cm_dev->port[i-1];
3332 ib_modify_port(device, port->port_num, 0, &port_modify);
3333 ib_unregister_mad_agent(port->mad_agent);
3334 }
3335 kfree(cm_dev);
3336}
3337
3338static int __init ib_cm_init(void)
3339{
3340 int ret;
3341
3342 memset(&cm, 0, sizeof cm);
3343 INIT_LIST_HEAD(&cm.device_list);
3344 rwlock_init(&cm.device_lock);
3345 spin_lock_init(&cm.lock);
3346 cm.listen_service_table = RB_ROOT;
3347 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3348 cm.remote_id_table = RB_ROOT;
3349 cm.remote_qp_table = RB_ROOT;
3350 cm.remote_sidr_table = RB_ROOT;
3351 idr_init(&cm.local_id_table);
3352 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3353
3354 cm.wq = create_workqueue("ib_cm");
3355 if (!cm.wq)
3356 return -ENOMEM;
3357
3358 ret = ib_register_client(&cm_client);
3359 if (ret)
3360 goto error;
3361
3362 return 0;
3363error:
3364 destroy_workqueue(cm.wq);
3365 return ret;
3366}
3367
3368static void __exit ib_cm_cleanup(void)
3369{
a977049d
HR		 3370 destroy_workqueue(cm.wq);
3371 ib_unregister_client(&cm_client);
5d7edb3c 3372 idr_destroy(&cm.local_id_table);
a977049d
HR		 3373}
3374
3375module_init(ib_cm_init);
3376module_exit(ib_cm_cleanup);
3377
Linux kernel - Deliverables
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