?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Revert "[PATCH] paravirt: Add startup infrastructure for paravirtualization"
[pv_ops_mirror.git] / drivers / infiniband / core / cm.c
blobeff591deeb4642c4ef1a6c5a89dd49742d786c42
1 /*
2 * Copyright (c) 2004-2006 Intel Corporation. All rights reserved.
3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 *
35 * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $
36 */
37
38 #include <linux/completion.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/err.h>
41 #include <linux/idr.h>
42 #include <linux/interrupt.h>
43 #include <linux/random.h>
44 #include <linux/rbtree.h>
45 #include <linux/spinlock.h>
46 #include <linux/workqueue.h>
47
48 #include <rdma/ib_cache.h>
49 #include <rdma/ib_cm.h>
50 #include "cm_msgs.h"
51
52 MODULE_AUTHOR("Sean Hefty");
53 MODULE_DESCRIPTION("InfiniBand CM");
54 MODULE_LICENSE("Dual BSD/GPL");
55
56 static void cm_add_one(struct ib_device *device);
57 static void cm_remove_one(struct ib_device *device);
58
59 static struct ib_client cm_client = {
60 .name = "cm",
61 .add = cm_add_one,
62 .remove = cm_remove_one
63 };
64
65 static 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 __be32 random_id_operand;
77 struct list_head timewait_list;
78 struct workqueue_struct *wq;
79 } cm;
80
81 struct cm_port {
82 struct cm_device *cm_dev;
83 struct ib_mad_agent *mad_agent;
84 u8 port_num;
85 };
86
87 struct cm_device {
88 struct list_head list;
89 struct ib_device *device;
90 struct cm_port port[0];
91 };
92
93 struct cm_av {
94 struct cm_port *port;
95 union ib_gid dgid;
96 struct ib_ah_attr ah_attr;
97 u16 pkey_index;
98 u8 packet_life_time;
99 };
100
101 struct cm_work {
102 struct delayed_work work;
103 struct list_head list;
104 struct cm_port *port;
105 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
106 __be32 local_id; /* Established / timewait */
107 __be32 remote_id;
108 struct ib_cm_event cm_event;
109 struct ib_sa_path_rec path[0];
110 };
111
112 struct cm_timewait_info {
113 struct cm_work work; /* Must be first. */
114 struct list_head list;
115 struct rb_node remote_qp_node;
116 struct rb_node remote_id_node;
117 __be64 remote_ca_guid;
118 __be32 remote_qpn;
119 u8 inserted_remote_qp;
120 u8 inserted_remote_id;
121 };
122
123 struct cm_id_private {
124 struct ib_cm_id id;
125
126 struct rb_node service_node;
127 struct rb_node sidr_id_node;
128 spinlock_t lock; /* Do not acquire inside cm.lock */
129 struct completion comp;
130 atomic_t refcount;
131
132 struct ib_mad_send_buf *msg;
133 struct cm_timewait_info *timewait_info;
134 /* todo: use alternate port on send failure */
135 struct cm_av av;
136 struct cm_av alt_av;
137 struct ib_cm_compare_data *compare_data;
138
139 void *private_data;
140 __be64 tid;
141 __be32 local_qpn;
142 __be32 remote_qpn;
143 enum ib_qp_type qp_type;
144 __be32 sq_psn;
145 __be32 rq_psn;
146 int timeout_ms;
147 enum ib_mtu path_mtu;
148 __be16 pkey;
149 u8 private_data_len;
150 u8 max_cm_retries;
151 u8 peer_to_peer;
152 u8 responder_resources;
153 u8 initiator_depth;
154 u8 retry_count;
155 u8 rnr_retry_count;
156 u8 service_timeout;
157
158 struct list_head work_list;
159 atomic_t work_count;
160 };
161
162 static void cm_work_handler(struct work_struct *work);
163
164 static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
165 {
166 if (atomic_dec_and_test(&cm_id_priv->refcount))
167 complete(&cm_id_priv->comp);
168 }
169
170 static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
171 struct ib_mad_send_buf **msg)
172 {
173 struct ib_mad_agent *mad_agent;
174 struct ib_mad_send_buf *m;
175 struct ib_ah *ah;
176
177 mad_agent = cm_id_priv->av.port->mad_agent;
178 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
179 if (IS_ERR(ah))
180 return PTR_ERR(ah);
181
182 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
183 cm_id_priv->av.pkey_index,
184 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
185 GFP_ATOMIC);
186 if (IS_ERR(m)) {
187 ib_destroy_ah(ah);
188 return PTR_ERR(m);
189 }
190
191 /* Timeout set by caller if response is expected. */
192 m->ah = ah;
193 m->retries = cm_id_priv->max_cm_retries;
194
195 atomic_inc(&cm_id_priv->refcount);
196 m->context[0] = cm_id_priv;
197 *msg = m;
198 return 0;
199 }
200
201 static int cm_alloc_response_msg(struct cm_port *port,
202 struct ib_mad_recv_wc *mad_recv_wc,
203 struct ib_mad_send_buf **msg)
204 {
205 struct ib_mad_send_buf *m;
206 struct ib_ah *ah;
207
208 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
209 mad_recv_wc->recv_buf.grh, port->port_num);
210 if (IS_ERR(ah))
211 return PTR_ERR(ah);
212
213 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
214 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
215 GFP_ATOMIC);
216 if (IS_ERR(m)) {
217 ib_destroy_ah(ah);
218 return PTR_ERR(m);
219 }
220 m->ah = ah;
221 *msg = m;
222 return 0;
223 }
224
225 static void cm_free_msg(struct ib_mad_send_buf *msg)
226 {
227 ib_destroy_ah(msg->ah);
228 if (msg->context[0])
229 cm_deref_id(msg->context[0]);
230 ib_free_send_mad(msg);
231 }
232
233 static void * cm_copy_private_data(const void *private_data,
234 u8 private_data_len)
235 {
236 void *data;
237
238 if (!private_data || !private_data_len)
239 return NULL;
240
241 data = kmemdup(private_data, private_data_len, GFP_KERNEL);
242 if (!data)
243 return ERR_PTR(-ENOMEM);
244
245 return data;
246 }
247
248 static void cm_set_private_data(struct cm_id_private *cm_id_priv,
249 void *private_data, u8 private_data_len)
250 {
251 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
252 kfree(cm_id_priv->private_data);
253
254 cm_id_priv->private_data = private_data;
255 cm_id_priv->private_data_len = private_data_len;
256 }
257
258 static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
259 struct ib_grh *grh, struct cm_av *av)
260 {
261 av->port = port;
262 av->pkey_index = wc->pkey_index;
263 ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc,
264 grh, &av->ah_attr);
265 }
266
267 static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
268 {
269 struct cm_device *cm_dev;
270 struct cm_port *port = NULL;
271 unsigned long flags;
272 int ret;
273 u8 p;
274
275 read_lock_irqsave(&cm.device_lock, flags);
276 list_for_each_entry(cm_dev, &cm.device_list, list) {
277 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
278 &p, NULL)) {
279 port = &cm_dev->port[p-1];
280 break;
281 }
282 }
283 read_unlock_irqrestore(&cm.device_lock, flags);
284
285 if (!port)
286 return -EINVAL;
287
288 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
289 be16_to_cpu(path->pkey), &av->pkey_index);
290 if (ret)
291 return ret;
292
293 av->port = port;
294 ib_init_ah_from_path(cm_dev->device, port->port_num, path,
295 &av->ah_attr);
296 av->packet_life_time = path->packet_life_time;
297 return 0;
298 }
299
300 static int cm_alloc_id(struct cm_id_private *cm_id_priv)
301 {
302 unsigned long flags;
303 int ret, id;
304 static int next_id;
305
306 do {
307 spin_lock_irqsave(&cm.lock, flags);
308 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv,
309 next_id++, &id);
310 spin_unlock_irqrestore(&cm.lock, flags);
311 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
312
313 cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand);
314 return ret;
315 }
316
317 static void cm_free_id(__be32 local_id)
318 {
319 unsigned long flags;
320
321 spin_lock_irqsave(&cm.lock, flags);
322 idr_remove(&cm.local_id_table,
323 (__force int) (local_id ^ cm.random_id_operand));
324 spin_unlock_irqrestore(&cm.lock, flags);
325 }
326
327 static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
328 {
329 struct cm_id_private *cm_id_priv;
330
331 cm_id_priv = idr_find(&cm.local_id_table,
332 (__force int) (local_id ^ cm.random_id_operand));
333 if (cm_id_priv) {
334 if (cm_id_priv->id.remote_id == remote_id)
335 atomic_inc(&cm_id_priv->refcount);
336 else
337 cm_id_priv = NULL;
338 }
339
340 return cm_id_priv;
341 }
342
343 static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
344 {
345 struct cm_id_private *cm_id_priv;
346 unsigned long flags;
347
348 spin_lock_irqsave(&cm.lock, flags);
349 cm_id_priv = cm_get_id(local_id, remote_id);
350 spin_unlock_irqrestore(&cm.lock, flags);
351
352 return cm_id_priv;
353 }
354
355 static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
356 {
357 int i;
358
359 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
360 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
361 ((unsigned long *) mask)[i];
362 }
363
364 static int cm_compare_data(struct ib_cm_compare_data *src_data,
365 struct ib_cm_compare_data *dst_data)
366 {
367 u8 src[IB_CM_COMPARE_SIZE];
368 u8 dst[IB_CM_COMPARE_SIZE];
369
370 if (!src_data || !dst_data)
371 return 0;
372
373 cm_mask_copy(src, src_data->data, dst_data->mask);
374 cm_mask_copy(dst, dst_data->data, src_data->mask);
375 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
376 }
377
378 static int cm_compare_private_data(u8 *private_data,
379 struct ib_cm_compare_data *dst_data)
380 {
381 u8 src[IB_CM_COMPARE_SIZE];
382
383 if (!dst_data)
384 return 0;
385
386 cm_mask_copy(src, private_data, dst_data->mask);
387 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
388 }
389
390 static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
391 {
392 struct rb_node **link = &cm.listen_service_table.rb_node;
393 struct rb_node *parent = NULL;
394 struct cm_id_private *cur_cm_id_priv;
395 __be64 service_id = cm_id_priv->id.service_id;
396 __be64 service_mask = cm_id_priv->id.service_mask;
397 int data_cmp;
398
399 while (*link) {
400 parent = *link;
401 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
402 service_node);
403 data_cmp = cm_compare_data(cm_id_priv->compare_data,
404 cur_cm_id_priv->compare_data);
405 if ((cur_cm_id_priv->id.service_mask & service_id) ==
406 (service_mask & cur_cm_id_priv->id.service_id) &&
407 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
408 !data_cmp)
409 return cur_cm_id_priv;
410
411 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
412 link = &(*link)->rb_left;
413 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
414 link = &(*link)->rb_right;
415 else if (service_id < cur_cm_id_priv->id.service_id)
416 link = &(*link)->rb_left;
417 else if (service_id > cur_cm_id_priv->id.service_id)
418 link = &(*link)->rb_right;
419 else if (data_cmp < 0)
420 link = &(*link)->rb_left;
421 else
422 link = &(*link)->rb_right;
423 }
424 rb_link_node(&cm_id_priv->service_node, parent, link);
425 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
426 return NULL;
427 }
428
429 static struct cm_id_private * cm_find_listen(struct ib_device *device,
430 __be64 service_id,
431 u8 *private_data)
432 {
433 struct rb_node *node = cm.listen_service_table.rb_node;
434 struct cm_id_private *cm_id_priv;
435 int data_cmp;
436
437 while (node) {
438 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
439 data_cmp = cm_compare_private_data(private_data,
440 cm_id_priv->compare_data);
441 if ((cm_id_priv->id.service_mask & service_id) ==
442 cm_id_priv->id.service_id &&
443 (cm_id_priv->id.device == device) && !data_cmp)
444 return cm_id_priv;
445
446 if (device < cm_id_priv->id.device)
447 node = node->rb_left;
448 else if (device > cm_id_priv->id.device)
449 node = node->rb_right;
450 else if (service_id < cm_id_priv->id.service_id)
451 node = node->rb_left;
452 else if (service_id > cm_id_priv->id.service_id)
453 node = node->rb_right;
454 else if (data_cmp < 0)
455 node = node->rb_left;
456 else
457 node = node->rb_right;
458 }
459 return NULL;
460 }
461
462 static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
463 *timewait_info)
464 {
465 struct rb_node **link = &cm.remote_id_table.rb_node;
466 struct rb_node *parent = NULL;
467 struct cm_timewait_info *cur_timewait_info;
468 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
469 __be32 remote_id = timewait_info->work.remote_id;
470
471 while (*link) {
472 parent = *link;
473 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
474 remote_id_node);
475 if (remote_id < cur_timewait_info->work.remote_id)
476 link = &(*link)->rb_left;
477 else if (remote_id > cur_timewait_info->work.remote_id)
478 link = &(*link)->rb_right;
479 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
480 link = &(*link)->rb_left;
481 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
482 link = &(*link)->rb_right;
483 else
484 return cur_timewait_info;
485 }
486 timewait_info->inserted_remote_id = 1;
487 rb_link_node(&timewait_info->remote_id_node, parent, link);
488 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
489 return NULL;
490 }
491
492 static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
493 __be32 remote_id)
494 {
495 struct rb_node *node = cm.remote_id_table.rb_node;
496 struct cm_timewait_info *timewait_info;
497
498 while (node) {
499 timewait_info = rb_entry(node, struct cm_timewait_info,
500 remote_id_node);
501 if (remote_id < timewait_info->work.remote_id)
502 node = node->rb_left;
503 else if (remote_id > timewait_info->work.remote_id)
504 node = node->rb_right;
505 else if (remote_ca_guid < timewait_info->remote_ca_guid)
506 node = node->rb_left;
507 else if (remote_ca_guid > timewait_info->remote_ca_guid)
508 node = node->rb_right;
509 else
510 return timewait_info;
511 }
512 return NULL;
513 }
514
515 static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
516 *timewait_info)
517 {
518 struct rb_node **link = &cm.remote_qp_table.rb_node;
519 struct rb_node *parent = NULL;
520 struct cm_timewait_info *cur_timewait_info;
521 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
522 __be32 remote_qpn = timewait_info->remote_qpn;
523
524 while (*link) {
525 parent = *link;
526 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
527 remote_qp_node);
528 if (remote_qpn < cur_timewait_info->remote_qpn)
529 link = &(*link)->rb_left;
530 else if (remote_qpn > cur_timewait_info->remote_qpn)
531 link = &(*link)->rb_right;
532 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
533 link = &(*link)->rb_left;
534 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
535 link = &(*link)->rb_right;
536 else
537 return cur_timewait_info;
538 }
539 timewait_info->inserted_remote_qp = 1;
540 rb_link_node(&timewait_info->remote_qp_node, parent, link);
541 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
542 return NULL;
543 }
544
545 static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
546 *cm_id_priv)
547 {
548 struct rb_node **link = &cm.remote_sidr_table.rb_node;
549 struct rb_node *parent = NULL;
550 struct cm_id_private *cur_cm_id_priv;
551 union ib_gid *port_gid = &cm_id_priv->av.dgid;
552 __be32 remote_id = cm_id_priv->id.remote_id;
553
554 while (*link) {
555 parent = *link;
556 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
557 sidr_id_node);
558 if (remote_id < cur_cm_id_priv->id.remote_id)
559 link = &(*link)->rb_left;
560 else if (remote_id > cur_cm_id_priv->id.remote_id)
561 link = &(*link)->rb_right;
562 else {
563 int cmp;
564 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
565 sizeof *port_gid);
566 if (cmp < 0)
567 link = &(*link)->rb_left;
568 else if (cmp > 0)
569 link = &(*link)->rb_right;
570 else
571 return cur_cm_id_priv;
572 }
573 }
574 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
575 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
576 return NULL;
577 }
578
579 static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
580 enum ib_cm_sidr_status status)
581 {
582 struct ib_cm_sidr_rep_param param;
583
584 memset(&param, 0, sizeof param);
585 param.status = status;
586 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
587 }
588
589 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
590 ib_cm_handler cm_handler,
591 void *context)
592 {
593 struct cm_id_private *cm_id_priv;
594 int ret;
595
596 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
597 if (!cm_id_priv)
598 return ERR_PTR(-ENOMEM);
599
600 cm_id_priv->id.state = IB_CM_IDLE;
601 cm_id_priv->id.device = device;
602 cm_id_priv->id.cm_handler = cm_handler;
603 cm_id_priv->id.context = context;
604 cm_id_priv->id.remote_cm_qpn = 1;
605 ret = cm_alloc_id(cm_id_priv);
606 if (ret)
607 goto error;
608
609 spin_lock_init(&cm_id_priv->lock);
610 init_completion(&cm_id_priv->comp);
611 INIT_LIST_HEAD(&cm_id_priv->work_list);
612 atomic_set(&cm_id_priv->work_count, -1);
613 atomic_set(&cm_id_priv->refcount, 1);
614 return &cm_id_priv->id;
615
616 error:
617 kfree(cm_id_priv);
618 return ERR_PTR(-ENOMEM);
619 }
620 EXPORT_SYMBOL(ib_create_cm_id);
621
622 static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
623 {
624 struct cm_work *work;
625
626 if (list_empty(&cm_id_priv->work_list))
627 return NULL;
628
629 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
630 list_del(&work->list);
631 return work;
632 }
633
634 static void cm_free_work(struct cm_work *work)
635 {
636 if (work->mad_recv_wc)
637 ib_free_recv_mad(work->mad_recv_wc);
638 kfree(work);
639 }
640
641 static inline int cm_convert_to_ms(int iba_time)
642 {
643 /* approximate conversion to ms from 4.096us x 2^iba_time */
644 return 1 << max(iba_time - 8, 0);
645 }
646
647 static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
648 {
649 if (timewait_info->inserted_remote_id) {
650 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
651 timewait_info->inserted_remote_id = 0;
652 }
653
654 if (timewait_info->inserted_remote_qp) {
655 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
656 timewait_info->inserted_remote_qp = 0;
657 }
658 }
659
660 static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
661 {
662 struct cm_timewait_info *timewait_info;
663
664 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
665 if (!timewait_info)
666 return ERR_PTR(-ENOMEM);
667
668 timewait_info->work.local_id = local_id;
669 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
670 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
671 return timewait_info;
672 }
673
674 static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
675 {
676 int wait_time;
677 unsigned long flags;
678
679 spin_lock_irqsave(&cm.lock, flags);
680 cm_cleanup_timewait(cm_id_priv->timewait_info);
681 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
682 spin_unlock_irqrestore(&cm.lock, flags);
683
684 /*
685 * The cm_id could be destroyed by the user before we exit timewait.
686 * To protect against this, we search for the cm_id after exiting
687 * timewait before notifying the user that we've exited timewait.
688 */
689 cm_id_priv->id.state = IB_CM_TIMEWAIT;
690 wait_time = cm_convert_to_ms(cm_id_priv->av.packet_life_time + 1);
691 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
692 msecs_to_jiffies(wait_time));
693 cm_id_priv->timewait_info = NULL;
694 }
695
696 static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
697 {
698 unsigned long flags;
699
700 cm_id_priv->id.state = IB_CM_IDLE;
701 if (cm_id_priv->timewait_info) {
702 spin_lock_irqsave(&cm.lock, flags);
703 cm_cleanup_timewait(cm_id_priv->timewait_info);
704 spin_unlock_irqrestore(&cm.lock, flags);
705 kfree(cm_id_priv->timewait_info);
706 cm_id_priv->timewait_info = NULL;
707 }
708 }
709
710 static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
711 {
712 struct cm_id_private *cm_id_priv;
713 struct cm_work *work;
714 unsigned long flags;
715
716 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
717 retest:
718 spin_lock_irqsave(&cm_id_priv->lock, flags);
719 switch (cm_id->state) {
720 case IB_CM_LISTEN:
721 cm_id->state = IB_CM_IDLE;
722 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
723 spin_lock_irqsave(&cm.lock, flags);
724 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
725 spin_unlock_irqrestore(&cm.lock, flags);
726 break;
727 case IB_CM_SIDR_REQ_SENT:
728 cm_id->state = IB_CM_IDLE;
729 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
730 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
731 break;
732 case IB_CM_SIDR_REQ_RCVD:
733 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
734 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
735 break;
736 case IB_CM_REQ_SENT:
737 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
738 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
739 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
740 &cm_id_priv->id.device->node_guid,
741 sizeof cm_id_priv->id.device->node_guid,
742 NULL, 0);
743 break;
744 case IB_CM_REQ_RCVD:
745 if (err == -ENOMEM) {
746 /* Do not reject to allow future retries. */
747 cm_reset_to_idle(cm_id_priv);
748 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
749 } else {
750 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
751 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
752 NULL, 0, NULL, 0);
753 }
754 break;
755 case IB_CM_MRA_REQ_RCVD:
756 case IB_CM_REP_SENT:
757 case IB_CM_MRA_REP_RCVD:
758 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
759 /* Fall through */
760 case IB_CM_MRA_REQ_SENT:
761 case IB_CM_REP_RCVD:
762 case IB_CM_MRA_REP_SENT:
763 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
764 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
765 NULL, 0, NULL, 0);
766 break;
767 case IB_CM_ESTABLISHED:
768 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
769 ib_send_cm_dreq(cm_id, NULL, 0);
770 goto retest;
771 case IB_CM_DREQ_SENT:
772 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
773 cm_enter_timewait(cm_id_priv);
774 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
775 break;
776 case IB_CM_DREQ_RCVD:
777 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
778 ib_send_cm_drep(cm_id, NULL, 0);
779 break;
780 default:
781 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
782 break;
783 }
784
785 cm_free_id(cm_id->local_id);
786 cm_deref_id(cm_id_priv);
787 wait_for_completion(&cm_id_priv->comp);
788 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
789 cm_free_work(work);
790 kfree(cm_id_priv->compare_data);
791 kfree(cm_id_priv->private_data);
792 kfree(cm_id_priv);
793 }
794
795 void ib_destroy_cm_id(struct ib_cm_id *cm_id)
796 {
797 cm_destroy_id(cm_id, 0);
798 }
799 EXPORT_SYMBOL(ib_destroy_cm_id);
800
801 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
802 struct ib_cm_compare_data *compare_data)
803 {
804 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
805 unsigned long flags;
806 int ret = 0;
807
808 service_mask = service_mask ? service_mask :
809 __constant_cpu_to_be64(~0ULL);
810 service_id &= service_mask;
811 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
812 (service_id != IB_CM_ASSIGN_SERVICE_ID))
813 return -EINVAL;
814
815 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
816 if (cm_id->state != IB_CM_IDLE)
817 return -EINVAL;
818
819 if (compare_data) {
820 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
821 GFP_KERNEL);
822 if (!cm_id_priv->compare_data)
823 return -ENOMEM;
824 cm_mask_copy(cm_id_priv->compare_data->data,
825 compare_data->data, compare_data->mask);
826 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
827 IB_CM_COMPARE_SIZE);
828 }
829
830 cm_id->state = IB_CM_LISTEN;
831
832 spin_lock_irqsave(&cm.lock, flags);
833 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
834 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
835 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
836 } else {
837 cm_id->service_id = service_id;
838 cm_id->service_mask = service_mask;
839 }
840 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
841 spin_unlock_irqrestore(&cm.lock, flags);
842
843 if (cur_cm_id_priv) {
844 cm_id->state = IB_CM_IDLE;
845 kfree(cm_id_priv->compare_data);
846 cm_id_priv->compare_data = NULL;
847 ret = -EBUSY;
848 }
849 return ret;
850 }
851 EXPORT_SYMBOL(ib_cm_listen);
852
853 static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
854 enum cm_msg_sequence msg_seq)
855 {
856 u64 hi_tid, low_tid;
857
858 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
859 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
860 (msg_seq << 30));
861 return cpu_to_be64(hi_tid | low_tid);
862 }
863
864 static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
865 __be16 attr_id, __be64 tid)
866 {
867 hdr->base_version = IB_MGMT_BASE_VERSION;
868 hdr->mgmt_class = IB_MGMT_CLASS_CM;
869 hdr->class_version = IB_CM_CLASS_VERSION;
870 hdr->method = IB_MGMT_METHOD_SEND;
871 hdr->attr_id = attr_id;
872 hdr->tid = tid;
873 }
874
875 static void cm_format_req(struct cm_req_msg *req_msg,
876 struct cm_id_private *cm_id_priv,
877 struct ib_cm_req_param *param)
878 {
879 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
880 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
881
882 req_msg->local_comm_id = cm_id_priv->id.local_id;
883 req_msg->service_id = param->service_id;
884 req_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
885 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
886 cm_req_set_resp_res(req_msg, param->responder_resources);
887 cm_req_set_init_depth(req_msg, param->initiator_depth);
888 cm_req_set_remote_resp_timeout(req_msg,
889 param->remote_cm_response_timeout);
890 cm_req_set_qp_type(req_msg, param->qp_type);
891 cm_req_set_flow_ctrl(req_msg, param->flow_control);
892 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
893 cm_req_set_local_resp_timeout(req_msg,
894 param->local_cm_response_timeout);
895 cm_req_set_retry_count(req_msg, param->retry_count);
896 req_msg->pkey = param->primary_path->pkey;
897 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
898 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
899 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
900 cm_req_set_srq(req_msg, param->srq);
901
902 req_msg->primary_local_lid = param->primary_path->slid;
903 req_msg->primary_remote_lid = param->primary_path->dlid;
904 req_msg->primary_local_gid = param->primary_path->sgid;
905 req_msg->primary_remote_gid = param->primary_path->dgid;
906 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
907 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
908 req_msg->primary_traffic_class = param->primary_path->traffic_class;
909 req_msg->primary_hop_limit = param->primary_path->hop_limit;
910 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
911 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
912 cm_req_set_primary_local_ack_timeout(req_msg,
913 min(31, param->primary_path->packet_life_time + 1));
914
915 if (param->alternate_path) {
916 req_msg->alt_local_lid = param->alternate_path->slid;
917 req_msg->alt_remote_lid = param->alternate_path->dlid;
918 req_msg->alt_local_gid = param->alternate_path->sgid;
919 req_msg->alt_remote_gid = param->alternate_path->dgid;
920 cm_req_set_alt_flow_label(req_msg,
921 param->alternate_path->flow_label);
922 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
923 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
924 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
925 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
926 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
927 cm_req_set_alt_local_ack_timeout(req_msg,
928 min(31, param->alternate_path->packet_life_time + 1));
929 }
930
931 if (param->private_data && param->private_data_len)
932 memcpy(req_msg->private_data, param->private_data,
933 param->private_data_len);
934 }
935
936 static int cm_validate_req_param(struct ib_cm_req_param *param)
937 {
938 /* peer-to-peer not supported */
939 if (param->peer_to_peer)
940 return -EINVAL;
941
942 if (!param->primary_path)
943 return -EINVAL;
944
945 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
946 return -EINVAL;
947
948 if (param->private_data &&
949 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
950 return -EINVAL;
951
952 if (param->alternate_path &&
953 (param->alternate_path->pkey != param->primary_path->pkey ||
954 param->alternate_path->mtu != param->primary_path->mtu))
955 return -EINVAL;
956
957 return 0;
958 }
959
960 int ib_send_cm_req(struct ib_cm_id *cm_id,
961 struct ib_cm_req_param *param)
962 {
963 struct cm_id_private *cm_id_priv;
964 struct cm_req_msg *req_msg;
965 unsigned long flags;
966 int ret;
967
968 ret = cm_validate_req_param(param);
969 if (ret)
970 return ret;
971
972 /* Verify that we're not in timewait. */
973 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
974 spin_lock_irqsave(&cm_id_priv->lock, flags);
975 if (cm_id->state != IB_CM_IDLE) {
976 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
977 ret = -EINVAL;
978 goto out;
979 }
980 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
981
982 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
983 id.local_id);
984 if (IS_ERR(cm_id_priv->timewait_info)) {
985 ret = PTR_ERR(cm_id_priv->timewait_info);
986 goto out;
987 }
988
989 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
990 if (ret)
991 goto error1;
992 if (param->alternate_path) {
993 ret = cm_init_av_by_path(param->alternate_path,
994 &cm_id_priv->alt_av);
995 if (ret)
996 goto error1;
997 }
998 cm_id->service_id = param->service_id;
999 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
1000 cm_id_priv->timeout_ms = cm_convert_to_ms(
1001 param->primary_path->packet_life_time) * 2 +
1002 cm_convert_to_ms(
1003 param->remote_cm_response_timeout);
1004 cm_id_priv->max_cm_retries = param->max_cm_retries;
1005 cm_id_priv->initiator_depth = param->initiator_depth;
1006 cm_id_priv->responder_resources = param->responder_resources;
1007 cm_id_priv->retry_count = param->retry_count;
1008 cm_id_priv->path_mtu = param->primary_path->mtu;
1009 cm_id_priv->pkey = param->primary_path->pkey;
1010 cm_id_priv->qp_type = param->qp_type;
1011
1012 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1013 if (ret)
1014 goto error1;
1015
1016 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1017 cm_format_req(req_msg, cm_id_priv, param);
1018 cm_id_priv->tid = req_msg->hdr.tid;
1019 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
1020 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1021
1022 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1023 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
1024
1025 spin_lock_irqsave(&cm_id_priv->lock, flags);
1026 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
1027 if (ret) {
1028 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1029 goto error2;
1030 }
1031 BUG_ON(cm_id->state != IB_CM_IDLE);
1032 cm_id->state = IB_CM_REQ_SENT;
1033 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1034 return 0;
1035
1036 error2: cm_free_msg(cm_id_priv->msg);
1037 error1: kfree(cm_id_priv->timewait_info);
1038 out: return ret;
1039 }
1040 EXPORT_SYMBOL(ib_send_cm_req);
1041
1042 static int cm_issue_rej(struct cm_port *port,
1043 struct ib_mad_recv_wc *mad_recv_wc,
1044 enum ib_cm_rej_reason reason,
1045 enum cm_msg_response msg_rejected,
1046 void *ari, u8 ari_length)
1047 {
1048 struct ib_mad_send_buf *msg = NULL;
1049 struct cm_rej_msg *rej_msg, *rcv_msg;
1050 int ret;
1051
1052 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1053 if (ret)
1054 return ret;
1055
1056 /* We just need common CM header information. Cast to any message. */
1057 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1058 rej_msg = (struct cm_rej_msg *) msg->mad;
1059
1060 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1061 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1062 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1063 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
1064 rej_msg->reason = cpu_to_be16(reason);
1065
1066 if (ari && ari_length) {
1067 cm_rej_set_reject_info_len(rej_msg, ari_length);
1068 memcpy(rej_msg->ari, ari, ari_length);
1069 }
1070
1071 ret = ib_post_send_mad(msg, NULL);
1072 if (ret)
1073 cm_free_msg(msg);
1074
1075 return ret;
1076 }
1077
1078 static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1079 __be32 local_qpn, __be32 remote_qpn)
1080 {
1081 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1082 ((local_ca_guid == remote_ca_guid) &&
1083 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1084 }
1085
1086 static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
1087 struct ib_sa_path_rec *primary_path,
1088 struct ib_sa_path_rec *alt_path)
1089 {
1090 memset(primary_path, 0, sizeof *primary_path);
1091 primary_path->dgid = req_msg->primary_local_gid;
1092 primary_path->sgid = req_msg->primary_remote_gid;
1093 primary_path->dlid = req_msg->primary_local_lid;
1094 primary_path->slid = req_msg->primary_remote_lid;
1095 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1096 primary_path->hop_limit = req_msg->primary_hop_limit;
1097 primary_path->traffic_class = req_msg->primary_traffic_class;
1098 primary_path->reversible = 1;
1099 primary_path->pkey = req_msg->pkey;
1100 primary_path->sl = cm_req_get_primary_sl(req_msg);
1101 primary_path->mtu_selector = IB_SA_EQ;
1102 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1103 primary_path->rate_selector = IB_SA_EQ;
1104 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1105 primary_path->packet_life_time_selector = IB_SA_EQ;
1106 primary_path->packet_life_time =
1107 cm_req_get_primary_local_ack_timeout(req_msg);
1108 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1109
1110 if (req_msg->alt_local_lid) {
1111 memset(alt_path, 0, sizeof *alt_path);
1112 alt_path->dgid = req_msg->alt_local_gid;
1113 alt_path->sgid = req_msg->alt_remote_gid;
1114 alt_path->dlid = req_msg->alt_local_lid;
1115 alt_path->slid = req_msg->alt_remote_lid;
1116 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1117 alt_path->hop_limit = req_msg->alt_hop_limit;
1118 alt_path->traffic_class = req_msg->alt_traffic_class;
1119 alt_path->reversible = 1;
1120 alt_path->pkey = req_msg->pkey;
1121 alt_path->sl = cm_req_get_alt_sl(req_msg);
1122 alt_path->mtu_selector = IB_SA_EQ;
1123 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1124 alt_path->rate_selector = IB_SA_EQ;
1125 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1126 alt_path->packet_life_time_selector = IB_SA_EQ;
1127 alt_path->packet_life_time =
1128 cm_req_get_alt_local_ack_timeout(req_msg);
1129 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1130 }
1131 }
1132
1133 static void cm_format_req_event(struct cm_work *work,
1134 struct cm_id_private *cm_id_priv,
1135 struct ib_cm_id *listen_id)
1136 {
1137 struct cm_req_msg *req_msg;
1138 struct ib_cm_req_event_param *param;
1139
1140 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1141 param = &work->cm_event.param.req_rcvd;
1142 param->listen_id = listen_id;
1143 param->port = cm_id_priv->av.port->port_num;
1144 param->primary_path = &work->path[0];
1145 if (req_msg->alt_local_lid)
1146 param->alternate_path = &work->path[1];
1147 else
1148 param->alternate_path = NULL;
1149 param->remote_ca_guid = req_msg->local_ca_guid;
1150 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1151 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1152 param->qp_type = cm_req_get_qp_type(req_msg);
1153 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1154 param->responder_resources = cm_req_get_init_depth(req_msg);
1155 param->initiator_depth = cm_req_get_resp_res(req_msg);
1156 param->local_cm_response_timeout =
1157 cm_req_get_remote_resp_timeout(req_msg);
1158 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1159 param->remote_cm_response_timeout =
1160 cm_req_get_local_resp_timeout(req_msg);
1161 param->retry_count = cm_req_get_retry_count(req_msg);
1162 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1163 param->srq = cm_req_get_srq(req_msg);
1164 work->cm_event.private_data = &req_msg->private_data;
1165 }
1166
1167 static void cm_process_work(struct cm_id_private *cm_id_priv,
1168 struct cm_work *work)
1169 {
1170 unsigned long flags;
1171 int ret;
1172
1173 /* We will typically only have the current event to report. */
1174 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1175 cm_free_work(work);
1176
1177 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1178 spin_lock_irqsave(&cm_id_priv->lock, flags);
1179 work = cm_dequeue_work(cm_id_priv);
1180 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1181 BUG_ON(!work);
1182 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1183 &work->cm_event);
1184 cm_free_work(work);
1185 }
1186 cm_deref_id(cm_id_priv);
1187 if (ret)
1188 cm_destroy_id(&cm_id_priv->id, ret);
1189 }
1190
1191 static void cm_format_mra(struct cm_mra_msg *mra_msg,
1192 struct cm_id_private *cm_id_priv,
1193 enum cm_msg_response msg_mraed, u8 service_timeout,
1194 const void *private_data, u8 private_data_len)
1195 {
1196 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1197 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1198 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1199 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1200 cm_mra_set_service_timeout(mra_msg, service_timeout);
1201
1202 if (private_data && private_data_len)
1203 memcpy(mra_msg->private_data, private_data, private_data_len);
1204 }
1205
1206 static void cm_format_rej(struct cm_rej_msg *rej_msg,
1207 struct cm_id_private *cm_id_priv,
1208 enum ib_cm_rej_reason reason,
1209 void *ari,
1210 u8 ari_length,
1211 const void *private_data,
1212 u8 private_data_len)
1213 {
1214 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1215 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1216
1217 switch(cm_id_priv->id.state) {
1218 case IB_CM_REQ_RCVD:
1219 rej_msg->local_comm_id = 0;
1220 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1221 break;
1222 case IB_CM_MRA_REQ_SENT:
1223 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1224 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1225 break;
1226 case IB_CM_REP_RCVD:
1227 case IB_CM_MRA_REP_SENT:
1228 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1229 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1230 break;
1231 default:
1232 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1233 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1234 break;
1235 }
1236
1237 rej_msg->reason = cpu_to_be16(reason);
1238 if (ari && ari_length) {
1239 cm_rej_set_reject_info_len(rej_msg, ari_length);
1240 memcpy(rej_msg->ari, ari, ari_length);
1241 }
1242
1243 if (private_data && private_data_len)
1244 memcpy(rej_msg->private_data, private_data, private_data_len);
1245 }
1246
1247 static void cm_dup_req_handler(struct cm_work *work,
1248 struct cm_id_private *cm_id_priv)
1249 {
1250 struct ib_mad_send_buf *msg = NULL;
1251 unsigned long flags;
1252 int ret;
1253
1254 /* Quick state check to discard duplicate REQs. */
1255 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1256 return;
1257
1258 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1259 if (ret)
1260 return;
1261
1262 spin_lock_irqsave(&cm_id_priv->lock, flags);
1263 switch (cm_id_priv->id.state) {
1264 case IB_CM_MRA_REQ_SENT:
1265 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1266 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1267 cm_id_priv->private_data,
1268 cm_id_priv->private_data_len);
1269 break;
1270 case IB_CM_TIMEWAIT:
1271 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1272 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1273 break;
1274 default:
1275 goto unlock;
1276 }
1277 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1278
1279 ret = ib_post_send_mad(msg, NULL);
1280 if (ret)
1281 goto free;
1282 return;
1283
1284 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1285 free: cm_free_msg(msg);
1286 }
1287
1288 static struct cm_id_private * cm_match_req(struct cm_work *work,
1289 struct cm_id_private *cm_id_priv)
1290 {
1291 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1292 struct cm_timewait_info *timewait_info;
1293 struct cm_req_msg *req_msg;
1294 unsigned long flags;
1295
1296 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1297
1298 /* Check for duplicate REQ and stale connections. */
1299 spin_lock_irqsave(&cm.lock, flags);
1300 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1301 if (!timewait_info)
1302 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1303
1304 if (timewait_info) {
1305 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1306 timewait_info->work.remote_id);
1307 cm_cleanup_timewait(cm_id_priv->timewait_info);
1308 spin_unlock_irqrestore(&cm.lock, flags);
1309 if (cur_cm_id_priv) {
1310 cm_dup_req_handler(work, cur_cm_id_priv);
1311 cm_deref_id(cur_cm_id_priv);
1312 } else
1313 cm_issue_rej(work->port, work->mad_recv_wc,
1314 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1315 NULL, 0);
1316 listen_cm_id_priv = NULL;
1317 goto out;
1318 }
1319
1320 /* Find matching listen request. */
1321 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
1322 req_msg->service_id,
1323 req_msg->private_data);
1324 if (!listen_cm_id_priv) {
1325 cm_cleanup_timewait(cm_id_priv->timewait_info);
1326 spin_unlock_irqrestore(&cm.lock, flags);
1327 cm_issue_rej(work->port, work->mad_recv_wc,
1328 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1329 NULL, 0);
1330 goto out;
1331 }
1332 atomic_inc(&listen_cm_id_priv->refcount);
1333 atomic_inc(&cm_id_priv->refcount);
1334 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1335 atomic_inc(&cm_id_priv->work_count);
1336 spin_unlock_irqrestore(&cm.lock, flags);
1337 out:
1338 return listen_cm_id_priv;
1339 }
1340
1341 static int cm_req_handler(struct cm_work *work)
1342 {
1343 struct ib_cm_id *cm_id;
1344 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1345 struct cm_req_msg *req_msg;
1346 int ret;
1347
1348 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1349
1350 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
1351 if (IS_ERR(cm_id))
1352 return PTR_ERR(cm_id);
1353
1354 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1355 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1356 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
1357 work->mad_recv_wc->recv_buf.grh,
1358 &cm_id_priv->av);
1359 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1360 id.local_id);
1361 if (IS_ERR(cm_id_priv->timewait_info)) {
1362 ret = PTR_ERR(cm_id_priv->timewait_info);
1363 goto destroy;
1364 }
1365 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1366 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1367 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1368
1369 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1370 if (!listen_cm_id_priv) {
1371 ret = -EINVAL;
1372 kfree(cm_id_priv->timewait_info);
1373 goto destroy;
1374 }
1375
1376 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1377 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1378 cm_id_priv->id.service_id = req_msg->service_id;
1379 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
1380
1381 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1382 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
1383 if (ret) {
1384 ib_get_cached_gid(work->port->cm_dev->device,
1385 work->port->port_num, 0, &work->path[0].sgid);
1386 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1387 &work->path[0].sgid, sizeof work->path[0].sgid,
1388 NULL, 0);
1389 goto rejected;
1390 }
1391 if (req_msg->alt_local_lid) {
1392 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
1393 if (ret) {
1394 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1395 &work->path[0].sgid,
1396 sizeof work->path[0].sgid, NULL, 0);
1397 goto rejected;
1398 }
1399 }
1400 cm_id_priv->tid = req_msg->hdr.tid;
1401 cm_id_priv->timeout_ms = cm_convert_to_ms(
1402 cm_req_get_local_resp_timeout(req_msg));
1403 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1404 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1405 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1406 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1407 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1408 cm_id_priv->pkey = req_msg->pkey;
1409 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1410 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1411 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1412 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
1413
1414 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1415 cm_process_work(cm_id_priv, work);
1416 cm_deref_id(listen_cm_id_priv);
1417 return 0;
1418
1419 rejected:
1420 atomic_dec(&cm_id_priv->refcount);
1421 cm_deref_id(listen_cm_id_priv);
1422 destroy:
1423 ib_destroy_cm_id(cm_id);
1424 return ret;
1425 }
1426
1427 static void cm_format_rep(struct cm_rep_msg *rep_msg,
1428 struct cm_id_private *cm_id_priv,
1429 struct ib_cm_rep_param *param)
1430 {
1431 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1432 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1433 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1434 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1435 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1436 rep_msg->resp_resources = param->responder_resources;
1437 rep_msg->initiator_depth = param->initiator_depth;
1438 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1439 cm_rep_set_failover(rep_msg, param->failover_accepted);
1440 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1441 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1442 cm_rep_set_srq(rep_msg, param->srq);
1443 rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
1444
1445 if (param->private_data && param->private_data_len)
1446 memcpy(rep_msg->private_data, param->private_data,
1447 param->private_data_len);
1448 }
1449
1450 int ib_send_cm_rep(struct ib_cm_id *cm_id,
1451 struct ib_cm_rep_param *param)
1452 {
1453 struct cm_id_private *cm_id_priv;
1454 struct ib_mad_send_buf *msg;
1455 struct cm_rep_msg *rep_msg;
1456 unsigned long flags;
1457 int ret;
1458
1459 if (param->private_data &&
1460 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1461 return -EINVAL;
1462
1463 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1464 spin_lock_irqsave(&cm_id_priv->lock, flags);
1465 if (cm_id->state != IB_CM_REQ_RCVD &&
1466 cm_id->state != IB_CM_MRA_REQ_SENT) {
1467 ret = -EINVAL;
1468 goto out;
1469 }
1470
1471 ret = cm_alloc_msg(cm_id_priv, &msg);
1472 if (ret)
1473 goto out;
1474
1475 rep_msg = (struct cm_rep_msg *) msg->mad;
1476 cm_format_rep(rep_msg, cm_id_priv, param);
1477 msg->timeout_ms = cm_id_priv->timeout_ms;
1478 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1479
1480 ret = ib_post_send_mad(msg, NULL);
1481 if (ret) {
1482 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1483 cm_free_msg(msg);
1484 return ret;
1485 }
1486
1487 cm_id->state = IB_CM_REP_SENT;
1488 cm_id_priv->msg = msg;
1489 cm_id_priv->initiator_depth = param->initiator_depth;
1490 cm_id_priv->responder_resources = param->responder_resources;
1491 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1492 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1493
1494 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1495 return ret;
1496 }
1497 EXPORT_SYMBOL(ib_send_cm_rep);
1498
1499 static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1500 struct cm_id_private *cm_id_priv,
1501 const void *private_data,
1502 u8 private_data_len)
1503 {
1504 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1505 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1506 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1507
1508 if (private_data && private_data_len)
1509 memcpy(rtu_msg->private_data, private_data, private_data_len);
1510 }
1511
1512 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1513 const void *private_data,
1514 u8 private_data_len)
1515 {
1516 struct cm_id_private *cm_id_priv;
1517 struct ib_mad_send_buf *msg;
1518 unsigned long flags;
1519 void *data;
1520 int ret;
1521
1522 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1523 return -EINVAL;
1524
1525 data = cm_copy_private_data(private_data, private_data_len);
1526 if (IS_ERR(data))
1527 return PTR_ERR(data);
1528
1529 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1530 spin_lock_irqsave(&cm_id_priv->lock, flags);
1531 if (cm_id->state != IB_CM_REP_RCVD &&
1532 cm_id->state != IB_CM_MRA_REP_SENT) {
1533 ret = -EINVAL;
1534 goto error;
1535 }
1536
1537 ret = cm_alloc_msg(cm_id_priv, &msg);
1538 if (ret)
1539 goto error;
1540
1541 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1542 private_data, private_data_len);
1543
1544 ret = ib_post_send_mad(msg, NULL);
1545 if (ret) {
1546 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1547 cm_free_msg(msg);
1548 kfree(data);
1549 return ret;
1550 }
1551
1552 cm_id->state = IB_CM_ESTABLISHED;
1553 cm_set_private_data(cm_id_priv, data, private_data_len);
1554 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1555 return 0;
1556
1557 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1558 kfree(data);
1559 return ret;
1560 }
1561 EXPORT_SYMBOL(ib_send_cm_rtu);
1562
1563 static void cm_format_rep_event(struct cm_work *work)
1564 {
1565 struct cm_rep_msg *rep_msg;
1566 struct ib_cm_rep_event_param *param;
1567
1568 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1569 param = &work->cm_event.param.rep_rcvd;
1570 param->remote_ca_guid = rep_msg->local_ca_guid;
1571 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1572 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1573 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1574 param->responder_resources = rep_msg->initiator_depth;
1575 param->initiator_depth = rep_msg->resp_resources;
1576 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1577 param->failover_accepted = cm_rep_get_failover(rep_msg);
1578 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1579 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1580 param->srq = cm_rep_get_srq(rep_msg);
1581 work->cm_event.private_data = &rep_msg->private_data;
1582 }
1583
1584 static void cm_dup_rep_handler(struct cm_work *work)
1585 {
1586 struct cm_id_private *cm_id_priv;
1587 struct cm_rep_msg *rep_msg;
1588 struct ib_mad_send_buf *msg = NULL;
1589 unsigned long flags;
1590 int ret;
1591
1592 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1593 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1594 rep_msg->local_comm_id);
1595 if (!cm_id_priv)
1596 return;
1597
1598 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1599 if (ret)
1600 goto deref;
1601
1602 spin_lock_irqsave(&cm_id_priv->lock, flags);
1603 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1604 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1605 cm_id_priv->private_data,
1606 cm_id_priv->private_data_len);
1607 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1608 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1609 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1610 cm_id_priv->private_data,
1611 cm_id_priv->private_data_len);
1612 else
1613 goto unlock;
1614 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1615
1616 ret = ib_post_send_mad(msg, NULL);
1617 if (ret)
1618 goto free;
1619 goto deref;
1620
1621 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1622 free: cm_free_msg(msg);
1623 deref: cm_deref_id(cm_id_priv);
1624 }
1625
1626 static int cm_rep_handler(struct cm_work *work)
1627 {
1628 struct cm_id_private *cm_id_priv;
1629 struct cm_rep_msg *rep_msg;
1630 unsigned long flags;
1631 int ret;
1632
1633 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1634 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1635 if (!cm_id_priv) {
1636 cm_dup_rep_handler(work);
1637 return -EINVAL;
1638 }
1639
1640 cm_format_rep_event(work);
1641
1642 spin_lock_irqsave(&cm_id_priv->lock, flags);
1643 switch (cm_id_priv->id.state) {
1644 case IB_CM_REQ_SENT:
1645 case IB_CM_MRA_REQ_RCVD:
1646 break;
1647 default:
1648 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1649 ret = -EINVAL;
1650 goto error;
1651 }
1652
1653 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1654 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1655 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1656
1657 spin_lock(&cm.lock);
1658 /* Check for duplicate REP. */
1659 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
1660 spin_unlock(&cm.lock);
1661 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1662 ret = -EINVAL;
1663 goto error;
1664 }
1665 /* Check for a stale connection. */
1666 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
1667 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1668 &cm.remote_id_table);
1669 cm_id_priv->timewait_info->inserted_remote_id = 0;
1670 spin_unlock(&cm.lock);
1671 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1672 cm_issue_rej(work->port, work->mad_recv_wc,
1673 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1674 NULL, 0);
1675 ret = -EINVAL;
1676 goto error;
1677 }
1678 spin_unlock(&cm.lock);
1679
1680 cm_id_priv->id.state = IB_CM_REP_RCVD;
1681 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1682 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1683 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1684 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1685 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1686 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1687
1688 /* todo: handle peer_to_peer */
1689
1690 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1691 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1692 if (!ret)
1693 list_add_tail(&work->list, &cm_id_priv->work_list);
1694 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1695
1696 if (ret)
1697 cm_process_work(cm_id_priv, work);
1698 else
1699 cm_deref_id(cm_id_priv);
1700 return 0;
1701
1702 error:
1703 cm_deref_id(cm_id_priv);
1704 return ret;
1705 }
1706
1707 static int cm_establish_handler(struct cm_work *work)
1708 {
1709 struct cm_id_private *cm_id_priv;
1710 unsigned long flags;
1711 int ret;
1712
1713 /* See comment in cm_establish about lookup. */
1714 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1715 if (!cm_id_priv)
1716 return -EINVAL;
1717
1718 spin_lock_irqsave(&cm_id_priv->lock, flags);
1719 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1720 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1721 goto out;
1722 }
1723
1724 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1725 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1726 if (!ret)
1727 list_add_tail(&work->list, &cm_id_priv->work_list);
1728 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1729
1730 if (ret)
1731 cm_process_work(cm_id_priv, work);
1732 else
1733 cm_deref_id(cm_id_priv);
1734 return 0;
1735 out:
1736 cm_deref_id(cm_id_priv);
1737 return -EINVAL;
1738 }
1739
1740 static int cm_rtu_handler(struct cm_work *work)
1741 {
1742 struct cm_id_private *cm_id_priv;
1743 struct cm_rtu_msg *rtu_msg;
1744 unsigned long flags;
1745 int ret;
1746
1747 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1748 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1749 rtu_msg->local_comm_id);
1750 if (!cm_id_priv)
1751 return -EINVAL;
1752
1753 work->cm_event.private_data = &rtu_msg->private_data;
1754
1755 spin_lock_irqsave(&cm_id_priv->lock, flags);
1756 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1757 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1758 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1759 goto out;
1760 }
1761 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1762
1763 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1764 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1765 if (!ret)
1766 list_add_tail(&work->list, &cm_id_priv->work_list);
1767 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1768
1769 if (ret)
1770 cm_process_work(cm_id_priv, work);
1771 else
1772 cm_deref_id(cm_id_priv);
1773 return 0;
1774 out:
1775 cm_deref_id(cm_id_priv);
1776 return -EINVAL;
1777 }
1778
1779 static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1780 struct cm_id_private *cm_id_priv,
1781 const void *private_data,
1782 u8 private_data_len)
1783 {
1784 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1785 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1786 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1787 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1788 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1789
1790 if (private_data && private_data_len)
1791 memcpy(dreq_msg->private_data, private_data, private_data_len);
1792 }
1793
1794 int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1795 const void *private_data,
1796 u8 private_data_len)
1797 {
1798 struct cm_id_private *cm_id_priv;
1799 struct ib_mad_send_buf *msg;
1800 unsigned long flags;
1801 int ret;
1802
1803 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1804 return -EINVAL;
1805
1806 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1807 spin_lock_irqsave(&cm_id_priv->lock, flags);
1808 if (cm_id->state != IB_CM_ESTABLISHED) {
1809 ret = -EINVAL;
1810 goto out;
1811 }
1812
1813 ret = cm_alloc_msg(cm_id_priv, &msg);
1814 if (ret) {
1815 cm_enter_timewait(cm_id_priv);
1816 goto out;
1817 }
1818
1819 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1820 private_data, private_data_len);
1821 msg->timeout_ms = cm_id_priv->timeout_ms;
1822 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1823
1824 ret = ib_post_send_mad(msg, NULL);
1825 if (ret) {
1826 cm_enter_timewait(cm_id_priv);
1827 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1828 cm_free_msg(msg);
1829 return ret;
1830 }
1831
1832 cm_id->state = IB_CM_DREQ_SENT;
1833 cm_id_priv->msg = msg;
1834 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1835 return ret;
1836 }
1837 EXPORT_SYMBOL(ib_send_cm_dreq);
1838
1839 static void cm_format_drep(struct cm_drep_msg *drep_msg,
1840 struct cm_id_private *cm_id_priv,
1841 const void *private_data,
1842 u8 private_data_len)
1843 {
1844 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1845 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1846 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1847
1848 if (private_data && private_data_len)
1849 memcpy(drep_msg->private_data, private_data, private_data_len);
1850 }
1851
1852 int ib_send_cm_drep(struct ib_cm_id *cm_id,
1853 const void *private_data,
1854 u8 private_data_len)
1855 {
1856 struct cm_id_private *cm_id_priv;
1857 struct ib_mad_send_buf *msg;
1858 unsigned long flags;
1859 void *data;
1860 int ret;
1861
1862 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1863 return -EINVAL;
1864
1865 data = cm_copy_private_data(private_data, private_data_len);
1866 if (IS_ERR(data))
1867 return PTR_ERR(data);
1868
1869 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1870 spin_lock_irqsave(&cm_id_priv->lock, flags);
1871 if (cm_id->state != IB_CM_DREQ_RCVD) {
1872 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1873 kfree(data);
1874 return -EINVAL;
1875 }
1876
1877 cm_set_private_data(cm_id_priv, data, private_data_len);
1878 cm_enter_timewait(cm_id_priv);
1879
1880 ret = cm_alloc_msg(cm_id_priv, &msg);
1881 if (ret)
1882 goto out;
1883
1884 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1885 private_data, private_data_len);
1886
1887 ret = ib_post_send_mad(msg, NULL);
1888 if (ret) {
1889 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1890 cm_free_msg(msg);
1891 return ret;
1892 }
1893
1894 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1895 return ret;
1896 }
1897 EXPORT_SYMBOL(ib_send_cm_drep);
1898
1899 static int cm_issue_drep(struct cm_port *port,
1900 struct ib_mad_recv_wc *mad_recv_wc)
1901 {
1902 struct ib_mad_send_buf *msg = NULL;
1903 struct cm_dreq_msg *dreq_msg;
1904 struct cm_drep_msg *drep_msg;
1905 int ret;
1906
1907 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1908 if (ret)
1909 return ret;
1910
1911 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
1912 drep_msg = (struct cm_drep_msg *) msg->mad;
1913
1914 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
1915 drep_msg->remote_comm_id = dreq_msg->local_comm_id;
1916 drep_msg->local_comm_id = dreq_msg->remote_comm_id;
1917
1918 ret = ib_post_send_mad(msg, NULL);
1919 if (ret)
1920 cm_free_msg(msg);
1921
1922 return ret;
1923 }
1924
1925 static int cm_dreq_handler(struct cm_work *work)
1926 {
1927 struct cm_id_private *cm_id_priv;
1928 struct cm_dreq_msg *dreq_msg;
1929 struct ib_mad_send_buf *msg = NULL;
1930 unsigned long flags;
1931 int ret;
1932
1933 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1934 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1935 dreq_msg->local_comm_id);
1936 if (!cm_id_priv) {
1937 cm_issue_drep(work->port, work->mad_recv_wc);
1938 return -EINVAL;
1939 }
1940
1941 work->cm_event.private_data = &dreq_msg->private_data;
1942
1943 spin_lock_irqsave(&cm_id_priv->lock, flags);
1944 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1945 goto unlock;
1946
1947 switch (cm_id_priv->id.state) {
1948 case IB_CM_REP_SENT:
1949 case IB_CM_DREQ_SENT:
1950 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1951 break;
1952 case IB_CM_ESTABLISHED:
1953 case IB_CM_MRA_REP_RCVD:
1954 break;
1955 case IB_CM_TIMEWAIT:
1956 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1957 goto unlock;
1958
1959 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1960 cm_id_priv->private_data,
1961 cm_id_priv->private_data_len);
1962 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1963
1964 if (ib_post_send_mad(msg, NULL))
1965 cm_free_msg(msg);
1966 goto deref;
1967 default:
1968 goto unlock;
1969 }
1970 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1971 cm_id_priv->tid = dreq_msg->hdr.tid;
1972 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1973 if (!ret)
1974 list_add_tail(&work->list, &cm_id_priv->work_list);
1975 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1976
1977 if (ret)
1978 cm_process_work(cm_id_priv, work);
1979 else
1980 cm_deref_id(cm_id_priv);
1981 return 0;
1982
1983 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1984 deref: cm_deref_id(cm_id_priv);
1985 return -EINVAL;
1986 }
1987
1988 static int cm_drep_handler(struct cm_work *work)
1989 {
1990 struct cm_id_private *cm_id_priv;
1991 struct cm_drep_msg *drep_msg;
1992 unsigned long flags;
1993 int ret;
1994
1995 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
1996 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
1997 drep_msg->local_comm_id);
1998 if (!cm_id_priv)
1999 return -EINVAL;
2000
2001 work->cm_event.private_data = &drep_msg->private_data;
2002
2003 spin_lock_irqsave(&cm_id_priv->lock, flags);
2004 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2005 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
2006 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2007 goto out;
2008 }
2009 cm_enter_timewait(cm_id_priv);
2010
2011 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2012 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2013 if (!ret)
2014 list_add_tail(&work->list, &cm_id_priv->work_list);
2015 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2016
2017 if (ret)
2018 cm_process_work(cm_id_priv, work);
2019 else
2020 cm_deref_id(cm_id_priv);
2021 return 0;
2022 out:
2023 cm_deref_id(cm_id_priv);
2024 return -EINVAL;
2025 }
2026
2027 int ib_send_cm_rej(struct ib_cm_id *cm_id,
2028 enum ib_cm_rej_reason reason,
2029 void *ari,
2030 u8 ari_length,
2031 const void *private_data,
2032 u8 private_data_len)
2033 {
2034 struct cm_id_private *cm_id_priv;
2035 struct ib_mad_send_buf *msg;
2036 unsigned long flags;
2037 int ret;
2038
2039 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2040 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2041 return -EINVAL;
2042
2043 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2044
2045 spin_lock_irqsave(&cm_id_priv->lock, flags);
2046 switch (cm_id->state) {
2047 case IB_CM_REQ_SENT:
2048 case IB_CM_MRA_REQ_RCVD:
2049 case IB_CM_REQ_RCVD:
2050 case IB_CM_MRA_REQ_SENT:
2051 case IB_CM_REP_RCVD:
2052 case IB_CM_MRA_REP_SENT:
2053 ret = cm_alloc_msg(cm_id_priv, &msg);
2054 if (!ret)
2055 cm_format_rej((struct cm_rej_msg *) msg->mad,
2056 cm_id_priv, reason, ari, ari_length,
2057 private_data, private_data_len);
2058
2059 cm_reset_to_idle(cm_id_priv);
2060 break;
2061 case IB_CM_REP_SENT:
2062 case IB_CM_MRA_REP_RCVD:
2063 ret = cm_alloc_msg(cm_id_priv, &msg);
2064 if (!ret)
2065 cm_format_rej((struct cm_rej_msg *) msg->mad,
2066 cm_id_priv, reason, ari, ari_length,
2067 private_data, private_data_len);
2068
2069 cm_enter_timewait(cm_id_priv);
2070 break;
2071 default:
2072 ret = -EINVAL;
2073 goto out;
2074 }
2075
2076 if (ret)
2077 goto out;
2078
2079 ret = ib_post_send_mad(msg, NULL);
2080 if (ret)
2081 cm_free_msg(msg);
2082
2083 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2084 return ret;
2085 }
2086 EXPORT_SYMBOL(ib_send_cm_rej);
2087
2088 static void cm_format_rej_event(struct cm_work *work)
2089 {
2090 struct cm_rej_msg *rej_msg;
2091 struct ib_cm_rej_event_param *param;
2092
2093 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2094 param = &work->cm_event.param.rej_rcvd;
2095 param->ari = rej_msg->ari;
2096 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
2097 param->reason = __be16_to_cpu(rej_msg->reason);
2098 work->cm_event.private_data = &rej_msg->private_data;
2099 }
2100
2101 static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2102 {
2103 struct cm_timewait_info *timewait_info;
2104 struct cm_id_private *cm_id_priv;
2105 unsigned long flags;
2106 __be32 remote_id;
2107
2108 remote_id = rej_msg->local_comm_id;
2109
2110 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
2111 spin_lock_irqsave(&cm.lock, flags);
2112 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
2113 remote_id);
2114 if (!timewait_info) {
2115 spin_unlock_irqrestore(&cm.lock, flags);
2116 return NULL;
2117 }
2118 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2119 (timewait_info->work.local_id ^
2120 cm.random_id_operand));
2121 if (cm_id_priv) {
2122 if (cm_id_priv->id.remote_id == remote_id)
2123 atomic_inc(&cm_id_priv->refcount);
2124 else
2125 cm_id_priv = NULL;
2126 }
2127 spin_unlock_irqrestore(&cm.lock, flags);
2128 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2129 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2130 else
2131 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2132
2133 return cm_id_priv;
2134 }
2135
2136 static int cm_rej_handler(struct cm_work *work)
2137 {
2138 struct cm_id_private *cm_id_priv;
2139 struct cm_rej_msg *rej_msg;
2140 unsigned long flags;
2141 int ret;
2142
2143 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2144 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2145 if (!cm_id_priv)
2146 return -EINVAL;
2147
2148 cm_format_rej_event(work);
2149
2150 spin_lock_irqsave(&cm_id_priv->lock, flags);
2151 switch (cm_id_priv->id.state) {
2152 case IB_CM_REQ_SENT:
2153 case IB_CM_MRA_REQ_RCVD:
2154 case IB_CM_REP_SENT:
2155 case IB_CM_MRA_REP_RCVD:
2156 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2157 /* fall through */
2158 case IB_CM_REQ_RCVD:
2159 case IB_CM_MRA_REQ_SENT:
2160 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
2161 cm_enter_timewait(cm_id_priv);
2162 else
2163 cm_reset_to_idle(cm_id_priv);
2164 break;
2165 case IB_CM_DREQ_SENT:
2166 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2167 /* fall through */
2168 case IB_CM_REP_RCVD:
2169 case IB_CM_MRA_REP_SENT:
2170 case IB_CM_ESTABLISHED:
2171 cm_enter_timewait(cm_id_priv);
2172 break;
2173 default:
2174 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2175 ret = -EINVAL;
2176 goto out;
2177 }
2178
2179 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2180 if (!ret)
2181 list_add_tail(&work->list, &cm_id_priv->work_list);
2182 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2183
2184 if (ret)
2185 cm_process_work(cm_id_priv, work);
2186 else
2187 cm_deref_id(cm_id_priv);
2188 return 0;
2189 out:
2190 cm_deref_id(cm_id_priv);
2191 return -EINVAL;
2192 }
2193
2194 int ib_send_cm_mra(struct ib_cm_id *cm_id,
2195 u8 service_timeout,
2196 const void *private_data,
2197 u8 private_data_len)
2198 {
2199 struct cm_id_private *cm_id_priv;
2200 struct ib_mad_send_buf *msg;
2201 void *data;
2202 unsigned long flags;
2203 int ret;
2204
2205 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2206 return -EINVAL;
2207
2208 data = cm_copy_private_data(private_data, private_data_len);
2209 if (IS_ERR(data))
2210 return PTR_ERR(data);
2211
2212 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2213
2214 spin_lock_irqsave(&cm_id_priv->lock, flags);
2215 switch(cm_id_priv->id.state) {
2216 case IB_CM_REQ_RCVD:
2217 ret = cm_alloc_msg(cm_id_priv, &msg);
2218 if (ret)
2219 goto error1;
2220
2221 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2222 CM_MSG_RESPONSE_REQ, service_timeout,
2223 private_data, private_data_len);
2224 ret = ib_post_send_mad(msg, NULL);
2225 if (ret)
2226 goto error2;
2227 cm_id->state = IB_CM_MRA_REQ_SENT;
2228 break;
2229 case IB_CM_REP_RCVD:
2230 ret = cm_alloc_msg(cm_id_priv, &msg);
2231 if (ret)
2232 goto error1;
2233
2234 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2235 CM_MSG_RESPONSE_REP, service_timeout,
2236 private_data, private_data_len);
2237 ret = ib_post_send_mad(msg, NULL);
2238 if (ret)
2239 goto error2;
2240 cm_id->state = IB_CM_MRA_REP_SENT;
2241 break;
2242 case IB_CM_ESTABLISHED:
2243 ret = cm_alloc_msg(cm_id_priv, &msg);
2244 if (ret)
2245 goto error1;
2246
2247 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2248 CM_MSG_RESPONSE_OTHER, service_timeout,
2249 private_data, private_data_len);
2250 ret = ib_post_send_mad(msg, NULL);
2251 if (ret)
2252 goto error2;
2253 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2254 break;
2255 default:
2256 ret = -EINVAL;
2257 goto error1;
2258 }
2259 cm_id_priv->service_timeout = service_timeout;
2260 cm_set_private_data(cm_id_priv, data, private_data_len);
2261 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2262 return 0;
2263
2264 error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2265 kfree(data);
2266 return ret;
2267
2268 error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2269 kfree(data);
2270 cm_free_msg(msg);
2271 return ret;
2272 }
2273 EXPORT_SYMBOL(ib_send_cm_mra);
2274
2275 static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2276 {
2277 switch (cm_mra_get_msg_mraed(mra_msg)) {
2278 case CM_MSG_RESPONSE_REQ:
2279 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2280 case CM_MSG_RESPONSE_REP:
2281 case CM_MSG_RESPONSE_OTHER:
2282 return cm_acquire_id(mra_msg->remote_comm_id,
2283 mra_msg->local_comm_id);
2284 default:
2285 return NULL;
2286 }
2287 }
2288
2289 static int cm_mra_handler(struct cm_work *work)
2290 {
2291 struct cm_id_private *cm_id_priv;
2292 struct cm_mra_msg *mra_msg;
2293 unsigned long flags;
2294 int timeout, ret;
2295
2296 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2297 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2298 if (!cm_id_priv)
2299 return -EINVAL;
2300
2301 work->cm_event.private_data = &mra_msg->private_data;
2302 work->cm_event.param.mra_rcvd.service_timeout =
2303 cm_mra_get_service_timeout(mra_msg);
2304 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2305 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2306
2307 spin_lock_irqsave(&cm_id_priv->lock, flags);
2308 switch (cm_id_priv->id.state) {
2309 case IB_CM_REQ_SENT:
2310 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2311 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2312 cm_id_priv->msg, timeout))
2313 goto out;
2314 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2315 break;
2316 case IB_CM_REP_SENT:
2317 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2318 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2319 cm_id_priv->msg, timeout))
2320 goto out;
2321 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2322 break;
2323 case IB_CM_ESTABLISHED:
2324 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2325 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2326 ib_modify_mad(cm_id_priv->av.port->mad_agent,
2327 cm_id_priv->msg, timeout))
2328 goto out;
2329 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2330 break;
2331 default:
2332 goto out;
2333 }
2334
2335 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2336 cm_id_priv->id.state;
2337 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2338 if (!ret)
2339 list_add_tail(&work->list, &cm_id_priv->work_list);
2340 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2341
2342 if (ret)
2343 cm_process_work(cm_id_priv, work);
2344 else
2345 cm_deref_id(cm_id_priv);
2346 return 0;
2347 out:
2348 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2349 cm_deref_id(cm_id_priv);
2350 return -EINVAL;
2351 }
2352
2353 static void cm_format_lap(struct cm_lap_msg *lap_msg,
2354 struct cm_id_private *cm_id_priv,
2355 struct ib_sa_path_rec *alternate_path,
2356 const void *private_data,
2357 u8 private_data_len)
2358 {
2359 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2360 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2361 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2362 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2363 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2364 /* todo: need remote CM response timeout */
2365 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2366 lap_msg->alt_local_lid = alternate_path->slid;
2367 lap_msg->alt_remote_lid = alternate_path->dlid;
2368 lap_msg->alt_local_gid = alternate_path->sgid;
2369 lap_msg->alt_remote_gid = alternate_path->dgid;
2370 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2371 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2372 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2373 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2374 cm_lap_set_sl(lap_msg, alternate_path->sl);
2375 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2376 cm_lap_set_local_ack_timeout(lap_msg,
2377 min(31, alternate_path->packet_life_time + 1));
2378
2379 if (private_data && private_data_len)
2380 memcpy(lap_msg->private_data, private_data, private_data_len);
2381 }
2382
2383 int ib_send_cm_lap(struct ib_cm_id *cm_id,
2384 struct ib_sa_path_rec *alternate_path,
2385 const void *private_data,
2386 u8 private_data_len)
2387 {
2388 struct cm_id_private *cm_id_priv;
2389 struct ib_mad_send_buf *msg;
2390 unsigned long flags;
2391 int ret;
2392
2393 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2394 return -EINVAL;
2395
2396 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2397 spin_lock_irqsave(&cm_id_priv->lock, flags);
2398 if (cm_id->state != IB_CM_ESTABLISHED ||
2399 (cm_id->lap_state != IB_CM_LAP_UNINIT &&
2400 cm_id->lap_state != IB_CM_LAP_IDLE)) {
2401 ret = -EINVAL;
2402 goto out;
2403 }
2404
2405 ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av);
2406 if (ret)
2407 goto out;
2408
2409 ret = cm_alloc_msg(cm_id_priv, &msg);
2410 if (ret)
2411 goto out;
2412
2413 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2414 alternate_path, private_data, private_data_len);
2415 msg->timeout_ms = cm_id_priv->timeout_ms;
2416 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2417
2418 ret = ib_post_send_mad(msg, NULL);
2419 if (ret) {
2420 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2421 cm_free_msg(msg);
2422 return ret;
2423 }
2424
2425 cm_id->lap_state = IB_CM_LAP_SENT;
2426 cm_id_priv->msg = msg;
2427
2428 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2429 return ret;
2430 }
2431 EXPORT_SYMBOL(ib_send_cm_lap);
2432
2433 static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
2434 struct ib_sa_path_rec *path,
2435 struct cm_lap_msg *lap_msg)
2436 {
2437 memset(path, 0, sizeof *path);
2438 path->dgid = lap_msg->alt_local_gid;
2439 path->sgid = lap_msg->alt_remote_gid;
2440 path->dlid = lap_msg->alt_local_lid;
2441 path->slid = lap_msg->alt_remote_lid;
2442 path->flow_label = cm_lap_get_flow_label(lap_msg);
2443 path->hop_limit = lap_msg->alt_hop_limit;
2444 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2445 path->reversible = 1;
2446 path->pkey = cm_id_priv->pkey;
2447 path->sl = cm_lap_get_sl(lap_msg);
2448 path->mtu_selector = IB_SA_EQ;
2449 path->mtu = cm_id_priv->path_mtu;
2450 path->rate_selector = IB_SA_EQ;
2451 path->rate = cm_lap_get_packet_rate(lap_msg);
2452 path->packet_life_time_selector = IB_SA_EQ;
2453 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2454 path->packet_life_time -= (path->packet_life_time > 0);
2455 }
2456
2457 static int cm_lap_handler(struct cm_work *work)
2458 {
2459 struct cm_id_private *cm_id_priv;
2460 struct cm_lap_msg *lap_msg;
2461 struct ib_cm_lap_event_param *param;
2462 struct ib_mad_send_buf *msg = NULL;
2463 unsigned long flags;
2464 int ret;
2465
2466 /* todo: verify LAP request and send reject APR if invalid. */
2467 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2468 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2469 lap_msg->local_comm_id);
2470 if (!cm_id_priv)
2471 return -EINVAL;
2472
2473 param = &work->cm_event.param.lap_rcvd;
2474 param->alternate_path = &work->path[0];
2475 cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
2476 work->cm_event.private_data = &lap_msg->private_data;
2477
2478 spin_lock_irqsave(&cm_id_priv->lock, flags);
2479 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2480 goto unlock;
2481
2482 switch (cm_id_priv->id.lap_state) {
2483 case IB_CM_LAP_UNINIT:
2484 case IB_CM_LAP_IDLE:
2485 break;
2486 case IB_CM_MRA_LAP_SENT:
2487 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2488 goto unlock;
2489
2490 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2491 CM_MSG_RESPONSE_OTHER,
2492 cm_id_priv->service_timeout,
2493 cm_id_priv->private_data,
2494 cm_id_priv->private_data_len);
2495 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2496
2497 if (ib_post_send_mad(msg, NULL))
2498 cm_free_msg(msg);
2499 goto deref;
2500 default:
2501 goto unlock;
2502 }
2503
2504 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2505 cm_id_priv->tid = lap_msg->hdr.tid;
2506 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2507 work->mad_recv_wc->recv_buf.grh,
2508 &cm_id_priv->av);
2509 cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av);
2510 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2511 if (!ret)
2512 list_add_tail(&work->list, &cm_id_priv->work_list);
2513 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2514
2515 if (ret)
2516 cm_process_work(cm_id_priv, work);
2517 else
2518 cm_deref_id(cm_id_priv);
2519 return 0;
2520
2521 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2522 deref: cm_deref_id(cm_id_priv);
2523 return -EINVAL;
2524 }
2525
2526 static void cm_format_apr(struct cm_apr_msg *apr_msg,
2527 struct cm_id_private *cm_id_priv,
2528 enum ib_cm_apr_status status,
2529 void *info,
2530 u8 info_length,
2531 const void *private_data,
2532 u8 private_data_len)
2533 {
2534 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2535 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2536 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2537 apr_msg->ap_status = (u8) status;
2538
2539 if (info && info_length) {
2540 apr_msg->info_length = info_length;
2541 memcpy(apr_msg->info, info, info_length);
2542 }
2543
2544 if (private_data && private_data_len)
2545 memcpy(apr_msg->private_data, private_data, private_data_len);
2546 }
2547
2548 int ib_send_cm_apr(struct ib_cm_id *cm_id,
2549 enum ib_cm_apr_status status,
2550 void *info,
2551 u8 info_length,
2552 const void *private_data,
2553 u8 private_data_len)
2554 {
2555 struct cm_id_private *cm_id_priv;
2556 struct ib_mad_send_buf *msg;
2557 unsigned long flags;
2558 int ret;
2559
2560 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2561 (info && info_length > IB_CM_APR_INFO_LENGTH))
2562 return -EINVAL;
2563
2564 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2565 spin_lock_irqsave(&cm_id_priv->lock, flags);
2566 if (cm_id->state != IB_CM_ESTABLISHED ||
2567 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2568 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2569 ret = -EINVAL;
2570 goto out;
2571 }
2572
2573 ret = cm_alloc_msg(cm_id_priv, &msg);
2574 if (ret)
2575 goto out;
2576
2577 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2578 info, info_length, private_data, private_data_len);
2579 ret = ib_post_send_mad(msg, NULL);
2580 if (ret) {
2581 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2582 cm_free_msg(msg);
2583 return ret;
2584 }
2585
2586 cm_id->lap_state = IB_CM_LAP_IDLE;
2587 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2588 return ret;
2589 }
2590 EXPORT_SYMBOL(ib_send_cm_apr);
2591
2592 static int cm_apr_handler(struct cm_work *work)
2593 {
2594 struct cm_id_private *cm_id_priv;
2595 struct cm_apr_msg *apr_msg;
2596 unsigned long flags;
2597 int ret;
2598
2599 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2600 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2601 apr_msg->local_comm_id);
2602 if (!cm_id_priv)
2603 return -EINVAL; /* Unmatched reply. */
2604
2605 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2606 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2607 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2608 work->cm_event.private_data = &apr_msg->private_data;
2609
2610 spin_lock_irqsave(&cm_id_priv->lock, flags);
2611 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2612 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2613 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2614 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2615 goto out;
2616 }
2617 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
2618 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2619 cm_id_priv->msg = NULL;
2620
2621 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2622 if (!ret)
2623 list_add_tail(&work->list, &cm_id_priv->work_list);
2624 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2625
2626 if (ret)
2627 cm_process_work(cm_id_priv, work);
2628 else
2629 cm_deref_id(cm_id_priv);
2630 return 0;
2631 out:
2632 cm_deref_id(cm_id_priv);
2633 return -EINVAL;
2634 }
2635
2636 static int cm_timewait_handler(struct cm_work *work)
2637 {
2638 struct cm_timewait_info *timewait_info;
2639 struct cm_id_private *cm_id_priv;
2640 int ret;
2641
2642 timewait_info = (struct cm_timewait_info *)work;
2643 spin_lock_irq(&cm.lock);
2644 list_del(&timewait_info->list);
2645 spin_unlock_irq(&cm.lock);
2646
2647 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2648 timewait_info->work.remote_id);
2649 if (!cm_id_priv)
2650 return -EINVAL;
2651
2652 spin_lock_irq(&cm_id_priv->lock);
2653 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2654 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
2655 spin_unlock_irq(&cm_id_priv->lock);
2656 goto out;
2657 }
2658 cm_id_priv->id.state = IB_CM_IDLE;
2659 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2660 if (!ret)
2661 list_add_tail(&work->list, &cm_id_priv->work_list);
2662 spin_unlock_irq(&cm_id_priv->lock);
2663
2664 if (ret)
2665 cm_process_work(cm_id_priv, work);
2666 else
2667 cm_deref_id(cm_id_priv);
2668 return 0;
2669 out:
2670 cm_deref_id(cm_id_priv);
2671 return -EINVAL;
2672 }
2673
2674 static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2675 struct cm_id_private *cm_id_priv,
2676 struct ib_cm_sidr_req_param *param)
2677 {
2678 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2679 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2680 sidr_req_msg->request_id = cm_id_priv->id.local_id;
2681 sidr_req_msg->pkey = cpu_to_be16(param->path->pkey);
2682 sidr_req_msg->service_id = param->service_id;
2683
2684 if (param->private_data && param->private_data_len)
2685 memcpy(sidr_req_msg->private_data, param->private_data,
2686 param->private_data_len);
2687 }
2688
2689 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2690 struct ib_cm_sidr_req_param *param)
2691 {
2692 struct cm_id_private *cm_id_priv;
2693 struct ib_mad_send_buf *msg;
2694 unsigned long flags;
2695 int ret;
2696
2697 if (!param->path || (param->private_data &&
2698 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2699 return -EINVAL;
2700
2701 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2702 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2703 if (ret)
2704 goto out;
2705
2706 cm_id->service_id = param->service_id;
2707 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
2708 cm_id_priv->timeout_ms = param->timeout_ms;
2709 cm_id_priv->max_cm_retries = param->max_cm_retries;
2710 ret = cm_alloc_msg(cm_id_priv, &msg);
2711 if (ret)
2712 goto out;
2713
2714 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2715 param);
2716 msg->timeout_ms = cm_id_priv->timeout_ms;
2717 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2718
2719 spin_lock_irqsave(&cm_id_priv->lock, flags);
2720 if (cm_id->state == IB_CM_IDLE)
2721 ret = ib_post_send_mad(msg, NULL);
2722 else
2723 ret = -EINVAL;
2724
2725 if (ret) {
2726 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2727 cm_free_msg(msg);
2728 goto out;
2729 }
2730 cm_id->state = IB_CM_SIDR_REQ_SENT;
2731 cm_id_priv->msg = msg;
2732 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2733 out:
2734 return ret;
2735 }
2736 EXPORT_SYMBOL(ib_send_cm_sidr_req);
2737
2738 static void cm_format_sidr_req_event(struct cm_work *work,
2739 struct ib_cm_id *listen_id)
2740 {
2741 struct cm_sidr_req_msg *sidr_req_msg;
2742 struct ib_cm_sidr_req_event_param *param;
2743
2744 sidr_req_msg = (struct cm_sidr_req_msg *)
2745 work->mad_recv_wc->recv_buf.mad;
2746 param = &work->cm_event.param.sidr_req_rcvd;
2747 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
2748 param->listen_id = listen_id;
2749 param->port = work->port->port_num;
2750 work->cm_event.private_data = &sidr_req_msg->private_data;
2751 }
2752
2753 static int cm_sidr_req_handler(struct cm_work *work)
2754 {
2755 struct ib_cm_id *cm_id;
2756 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2757 struct cm_sidr_req_msg *sidr_req_msg;
2758 struct ib_wc *wc;
2759 unsigned long flags;
2760
2761 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
2762 if (IS_ERR(cm_id))
2763 return PTR_ERR(cm_id);
2764 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2765
2766 /* Record SGID/SLID and request ID for lookup. */
2767 sidr_req_msg = (struct cm_sidr_req_msg *)
2768 work->mad_recv_wc->recv_buf.mad;
2769 wc = work->mad_recv_wc->wc;
2770 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
2771 cm_id_priv->av.dgid.global.interface_id = 0;
2772 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2773 work->mad_recv_wc->recv_buf.grh,
2774 &cm_id_priv->av);
2775 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2776 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2777 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2778 atomic_inc(&cm_id_priv->work_count);
2779
2780 spin_lock_irqsave(&cm.lock, flags);
2781 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2782 if (cur_cm_id_priv) {
2783 spin_unlock_irqrestore(&cm.lock, flags);
2784 goto out; /* Duplicate message. */
2785 }
2786 cur_cm_id_priv = cm_find_listen(cm_id->device,
2787 sidr_req_msg->service_id,
2788 sidr_req_msg->private_data);
2789 if (!cur_cm_id_priv) {
2790 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2791 spin_unlock_irqrestore(&cm.lock, flags);
2792 /* todo: reply with no match */
2793 goto out; /* No match. */
2794 }
2795 atomic_inc(&cur_cm_id_priv->refcount);
2796 spin_unlock_irqrestore(&cm.lock, flags);
2797
2798 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2799 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2800 cm_id_priv->id.service_id = sidr_req_msg->service_id;
2801 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
2802
2803 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2804 cm_process_work(cm_id_priv, work);
2805 cm_deref_id(cur_cm_id_priv);
2806 return 0;
2807 out:
2808 ib_destroy_cm_id(&cm_id_priv->id);
2809 return -EINVAL;
2810 }
2811
2812 static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2813 struct cm_id_private *cm_id_priv,
2814 struct ib_cm_sidr_rep_param *param)
2815 {
2816 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2817 cm_id_priv->tid);
2818 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2819 sidr_rep_msg->status = param->status;
2820 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2821 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2822 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2823
2824 if (param->info && param->info_length)
2825 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2826
2827 if (param->private_data && param->private_data_len)
2828 memcpy(sidr_rep_msg->private_data, param->private_data,
2829 param->private_data_len);
2830 }
2831
2832 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2833 struct ib_cm_sidr_rep_param *param)
2834 {
2835 struct cm_id_private *cm_id_priv;
2836 struct ib_mad_send_buf *msg;
2837 unsigned long flags;
2838 int ret;
2839
2840 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2841 (param->private_data &&
2842 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2843 return -EINVAL;
2844
2845 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2846 spin_lock_irqsave(&cm_id_priv->lock, flags);
2847 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2848 ret = -EINVAL;
2849 goto error;
2850 }
2851
2852 ret = cm_alloc_msg(cm_id_priv, &msg);
2853 if (ret)
2854 goto error;
2855
2856 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2857 param);
2858 ret = ib_post_send_mad(msg, NULL);
2859 if (ret) {
2860 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2861 cm_free_msg(msg);
2862 return ret;
2863 }
2864 cm_id->state = IB_CM_IDLE;
2865 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2866
2867 spin_lock_irqsave(&cm.lock, flags);
2868 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2869 spin_unlock_irqrestore(&cm.lock, flags);
2870 return 0;
2871
2872 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2873 return ret;
2874 }
2875 EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2876
2877 static void cm_format_sidr_rep_event(struct cm_work *work)
2878 {
2879 struct cm_sidr_rep_msg *sidr_rep_msg;
2880 struct ib_cm_sidr_rep_event_param *param;
2881
2882 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2883 work->mad_recv_wc->recv_buf.mad;
2884 param = &work->cm_event.param.sidr_rep_rcvd;
2885 param->status = sidr_rep_msg->status;
2886 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2887 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2888 param->info = &sidr_rep_msg->info;
2889 param->info_len = sidr_rep_msg->info_length;
2890 work->cm_event.private_data = &sidr_rep_msg->private_data;
2891 }
2892
2893 static int cm_sidr_rep_handler(struct cm_work *work)
2894 {
2895 struct cm_sidr_rep_msg *sidr_rep_msg;
2896 struct cm_id_private *cm_id_priv;
2897 unsigned long flags;
2898
2899 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2900 work->mad_recv_wc->recv_buf.mad;
2901 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2902 if (!cm_id_priv)
2903 return -EINVAL; /* Unmatched reply. */
2904
2905 spin_lock_irqsave(&cm_id_priv->lock, flags);
2906 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2907 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2908 goto out;
2909 }
2910 cm_id_priv->id.state = IB_CM_IDLE;
2911 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2912 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2913
2914 cm_format_sidr_rep_event(work);
2915 cm_process_work(cm_id_priv, work);
2916 return 0;
2917 out:
2918 cm_deref_id(cm_id_priv);
2919 return -EINVAL;
2920 }
2921
2922 static void cm_process_send_error(struct ib_mad_send_buf *msg,
2923 enum ib_wc_status wc_status)
2924 {
2925 struct cm_id_private *cm_id_priv;
2926 struct ib_cm_event cm_event;
2927 enum ib_cm_state state;
2928 unsigned long flags;
2929 int ret;
2930
2931 memset(&cm_event, 0, sizeof cm_event);
2932 cm_id_priv = msg->context[0];
2933
2934 /* Discard old sends or ones without a response. */
2935 spin_lock_irqsave(&cm_id_priv->lock, flags);
2936 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2937 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2938 goto discard;
2939
2940 switch (state) {
2941 case IB_CM_REQ_SENT:
2942 case IB_CM_MRA_REQ_RCVD:
2943 cm_reset_to_idle(cm_id_priv);
2944 cm_event.event = IB_CM_REQ_ERROR;
2945 break;
2946 case IB_CM_REP_SENT:
2947 case IB_CM_MRA_REP_RCVD:
2948 cm_reset_to_idle(cm_id_priv);
2949 cm_event.event = IB_CM_REP_ERROR;
2950 break;
2951 case IB_CM_DREQ_SENT:
2952 cm_enter_timewait(cm_id_priv);
2953 cm_event.event = IB_CM_DREQ_ERROR;
2954 break;
2955 case IB_CM_SIDR_REQ_SENT:
2956 cm_id_priv->id.state = IB_CM_IDLE;
2957 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2958 break;
2959 default:
2960 goto discard;
2961 }
2962 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2963 cm_event.param.send_status = wc_status;
2964
2965 /* No other events can occur on the cm_id at this point. */
2966 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2967 cm_free_msg(msg);
2968 if (ret)
2969 ib_destroy_cm_id(&cm_id_priv->id);
2970 return;
2971 discard:
2972 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2973 cm_free_msg(msg);
2974 }
2975
2976 static void cm_send_handler(struct ib_mad_agent *mad_agent,
2977 struct ib_mad_send_wc *mad_send_wc)
2978 {
2979 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
2980
2981 switch (mad_send_wc->status) {
2982 case IB_WC_SUCCESS:
2983 case IB_WC_WR_FLUSH_ERR:
2984 cm_free_msg(msg);
2985 break;
2986 default:
2987 if (msg->context[0] && msg->context[1])
2988 cm_process_send_error(msg, mad_send_wc->status);
2989 else
2990 cm_free_msg(msg);
2991 break;
2992 }
2993 }
2994
2995 static void cm_work_handler(struct work_struct *_work)
2996 {
2997 struct cm_work *work = container_of(_work, struct cm_work, work.work);
2998 int ret;
2999
3000 switch (work->cm_event.event) {
3001 case IB_CM_REQ_RECEIVED:
3002 ret = cm_req_handler(work);
3003 break;
3004 case IB_CM_MRA_RECEIVED:
3005 ret = cm_mra_handler(work);
3006 break;
3007 case IB_CM_REJ_RECEIVED:
3008 ret = cm_rej_handler(work);
3009 break;
3010 case IB_CM_REP_RECEIVED:
3011 ret = cm_rep_handler(work);
3012 break;
3013 case IB_CM_RTU_RECEIVED:
3014 ret = cm_rtu_handler(work);
3015 break;
3016 case IB_CM_USER_ESTABLISHED:
3017 ret = cm_establish_handler(work);
3018 break;
3019 case IB_CM_DREQ_RECEIVED:
3020 ret = cm_dreq_handler(work);
3021 break;
3022 case IB_CM_DREP_RECEIVED:
3023 ret = cm_drep_handler(work);
3024 break;
3025 case IB_CM_SIDR_REQ_RECEIVED:
3026 ret = cm_sidr_req_handler(work);
3027 break;
3028 case IB_CM_SIDR_REP_RECEIVED:
3029 ret = cm_sidr_rep_handler(work);
3030 break;
3031 case IB_CM_LAP_RECEIVED:
3032 ret = cm_lap_handler(work);
3033 break;
3034 case IB_CM_APR_RECEIVED:
3035 ret = cm_apr_handler(work);
3036 break;
3037 case IB_CM_TIMEWAIT_EXIT:
3038 ret = cm_timewait_handler(work);
3039 break;
3040 default:
3041 ret = -EINVAL;
3042 break;
3043 }
3044 if (ret)
3045 cm_free_work(work);
3046 }
3047
3048 static int cm_establish(struct ib_cm_id *cm_id)
3049 {
3050 struct cm_id_private *cm_id_priv;
3051 struct cm_work *work;
3052 unsigned long flags;
3053 int ret = 0;
3054
3055 work = kmalloc(sizeof *work, GFP_ATOMIC);
3056 if (!work)
3057 return -ENOMEM;
3058
3059 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3060 spin_lock_irqsave(&cm_id_priv->lock, flags);
3061 switch (cm_id->state)
3062 {
3063 case IB_CM_REP_SENT:
3064 case IB_CM_MRA_REP_RCVD:
3065 cm_id->state = IB_CM_ESTABLISHED;
3066 break;
3067 case IB_CM_ESTABLISHED:
3068 ret = -EISCONN;
3069 break;
3070 default:
3071 ret = -EINVAL;
3072 break;
3073 }
3074 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3075
3076 if (ret) {
3077 kfree(work);
3078 goto out;
3079 }
3080
3081 /*
3082 * The CM worker thread may try to destroy the cm_id before it
3083 * can execute this work item. To prevent potential deadlock,
3084 * we need to find the cm_id once we're in the context of the
3085 * worker thread, rather than holding a reference on it.
3086 */
3087 INIT_DELAYED_WORK(&work->work, cm_work_handler);
3088 work->local_id = cm_id->local_id;
3089 work->remote_id = cm_id->remote_id;
3090 work->mad_recv_wc = NULL;
3091 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3092 queue_delayed_work(cm.wq, &work->work, 0);
3093 out:
3094 return ret;
3095 }
3096
3097 static int cm_migrate(struct ib_cm_id *cm_id)
3098 {
3099 struct cm_id_private *cm_id_priv;
3100 unsigned long flags;
3101 int ret = 0;
3102
3103 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3104 spin_lock_irqsave(&cm_id_priv->lock, flags);
3105 if (cm_id->state == IB_CM_ESTABLISHED &&
3106 (cm_id->lap_state == IB_CM_LAP_UNINIT ||
3107 cm_id->lap_state == IB_CM_LAP_IDLE)) {
3108 cm_id->lap_state = IB_CM_LAP_IDLE;
3109 cm_id_priv->av = cm_id_priv->alt_av;
3110 } else
3111 ret = -EINVAL;
3112 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3113
3114 return ret;
3115 }
3116
3117 int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
3118 {
3119 int ret;
3120
3121 switch (event) {
3122 case IB_EVENT_COMM_EST:
3123 ret = cm_establish(cm_id);
3124 break;
3125 case IB_EVENT_PATH_MIG:
3126 ret = cm_migrate(cm_id);
3127 break;
3128 default:
3129 ret = -EINVAL;
3130 }
3131 return ret;
3132 }
3133 EXPORT_SYMBOL(ib_cm_notify);
3134
3135 static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3136 struct ib_mad_recv_wc *mad_recv_wc)
3137 {
3138 struct cm_work *work;
3139 enum ib_cm_event_type event;
3140 int paths = 0;
3141
3142 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3143 case CM_REQ_ATTR_ID:
3144 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3145 alt_local_lid != 0);
3146 event = IB_CM_REQ_RECEIVED;
3147 break;
3148 case CM_MRA_ATTR_ID:
3149 event = IB_CM_MRA_RECEIVED;
3150 break;
3151 case CM_REJ_ATTR_ID:
3152 event = IB_CM_REJ_RECEIVED;
3153 break;
3154 case CM_REP_ATTR_ID:
3155 event = IB_CM_REP_RECEIVED;
3156 break;
3157 case CM_RTU_ATTR_ID:
3158 event = IB_CM_RTU_RECEIVED;
3159 break;
3160 case CM_DREQ_ATTR_ID:
3161 event = IB_CM_DREQ_RECEIVED;
3162 break;
3163 case CM_DREP_ATTR_ID:
3164 event = IB_CM_DREP_RECEIVED;
3165 break;
3166 case CM_SIDR_REQ_ATTR_ID:
3167 event = IB_CM_SIDR_REQ_RECEIVED;
3168 break;
3169 case CM_SIDR_REP_ATTR_ID:
3170 event = IB_CM_SIDR_REP_RECEIVED;
3171 break;
3172 case CM_LAP_ATTR_ID:
3173 paths = 1;
3174 event = IB_CM_LAP_RECEIVED;
3175 break;
3176 case CM_APR_ATTR_ID:
3177 event = IB_CM_APR_RECEIVED;
3178 break;
3179 default:
3180 ib_free_recv_mad(mad_recv_wc);
3181 return;
3182 }
3183
3184 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3185 GFP_KERNEL);
3186 if (!work) {
3187 ib_free_recv_mad(mad_recv_wc);
3188 return;
3189 }
3190
3191 INIT_DELAYED_WORK(&work->work, cm_work_handler);
3192 work->cm_event.event = event;
3193 work->mad_recv_wc = mad_recv_wc;
3194 work->port = (struct cm_port *)mad_agent->context;
3195 queue_delayed_work(cm.wq, &work->work, 0);
3196 }
3197
3198 static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3199 struct ib_qp_attr *qp_attr,
3200 int *qp_attr_mask)
3201 {
3202 unsigned long flags;
3203 int ret;
3204
3205 spin_lock_irqsave(&cm_id_priv->lock, flags);
3206 switch (cm_id_priv->id.state) {
3207 case IB_CM_REQ_SENT:
3208 case IB_CM_MRA_REQ_RCVD:
3209 case IB_CM_REQ_RCVD:
3210 case IB_CM_MRA_REQ_SENT:
3211 case IB_CM_REP_RCVD:
3212 case IB_CM_MRA_REP_SENT:
3213 case IB_CM_REP_SENT:
3214 case IB_CM_MRA_REP_RCVD:
3215 case IB_CM_ESTABLISHED:
3216 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3217 IB_QP_PKEY_INDEX | IB_QP_PORT;
3218 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
3219 if (cm_id_priv->responder_resources)
3220 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3221 IB_ACCESS_REMOTE_ATOMIC;
3222 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3223 qp_attr->port_num = cm_id_priv->av.port->port_num;
3224 ret = 0;
3225 break;
3226 default:
3227 ret = -EINVAL;
3228 break;
3229 }
3230 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3231 return ret;
3232 }
3233
3234 static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3235 struct ib_qp_attr *qp_attr,
3236 int *qp_attr_mask)
3237 {
3238 unsigned long flags;
3239 int ret;
3240
3241 spin_lock_irqsave(&cm_id_priv->lock, flags);
3242 switch (cm_id_priv->id.state) {
3243 case IB_CM_REQ_RCVD:
3244 case IB_CM_MRA_REQ_SENT:
3245 case IB_CM_REP_RCVD:
3246 case IB_CM_MRA_REP_SENT:
3247 case IB_CM_REP_SENT:
3248 case IB_CM_MRA_REP_RCVD:
3249 case IB_CM_ESTABLISHED:
3250 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
3251 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
3252 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3253 qp_attr->path_mtu = cm_id_priv->path_mtu;
3254 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3255 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
3256 if (cm_id_priv->qp_type == IB_QPT_RC) {
3257 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3258 IB_QP_MIN_RNR_TIMER;
3259 qp_attr->max_dest_rd_atomic =
3260 cm_id_priv->responder_resources;
3261 qp_attr->min_rnr_timer = 0;
3262 }
3263 if (cm_id_priv->alt_av.ah_attr.dlid) {
3264 *qp_attr_mask |= IB_QP_ALT_PATH;
3265 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3266 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
3267 qp_attr->alt_timeout =
3268 cm_id_priv->alt_av.packet_life_time + 1;
3269 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3270 }
3271 ret = 0;
3272 break;
3273 default:
3274 ret = -EINVAL;
3275 break;
3276 }
3277 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3278 return ret;
3279 }
3280
3281 static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3282 struct ib_qp_attr *qp_attr,
3283 int *qp_attr_mask)
3284 {
3285 unsigned long flags;
3286 int ret;
3287
3288 spin_lock_irqsave(&cm_id_priv->lock, flags);
3289 switch (cm_id_priv->id.state) {
3290 /* Allow transition to RTS before sending REP */
3291 case IB_CM_REQ_RCVD:
3292 case IB_CM_MRA_REQ_SENT:
3293
3294 case IB_CM_REP_RCVD:
3295 case IB_CM_MRA_REP_SENT:
3296 case IB_CM_REP_SENT:
3297 case IB_CM_MRA_REP_RCVD:
3298 case IB_CM_ESTABLISHED:
3299 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
3300 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
3301 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
3302 if (cm_id_priv->qp_type == IB_QPT_RC) {
3303 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3304 IB_QP_RNR_RETRY |
3305 IB_QP_MAX_QP_RD_ATOMIC;
3306 qp_attr->timeout =
3307 cm_id_priv->av.packet_life_time + 1;
3308 qp_attr->retry_cnt = cm_id_priv->retry_count;
3309 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3310 qp_attr->max_rd_atomic =
3311 cm_id_priv->initiator_depth;
3312 }
3313 if (cm_id_priv->alt_av.ah_attr.dlid) {
3314 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3315 qp_attr->path_mig_state = IB_MIG_REARM;
3316 }
3317 } else {
3318 *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
3319 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3320 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
3321 qp_attr->alt_timeout =
3322 cm_id_priv->alt_av.packet_life_time + 1;
3323 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3324 qp_attr->path_mig_state = IB_MIG_REARM;
3325 }
3326 ret = 0;
3327 break;
3328 default:
3329 ret = -EINVAL;
3330 break;
3331 }
3332 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3333 return ret;
3334 }
3335
3336 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3337 struct ib_qp_attr *qp_attr,
3338 int *qp_attr_mask)
3339 {
3340 struct cm_id_private *cm_id_priv;
3341 int ret;
3342
3343 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3344 switch (qp_attr->qp_state) {
3345 case IB_QPS_INIT:
3346 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3347 break;
3348 case IB_QPS_RTR:
3349 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3350 break;
3351 case IB_QPS_RTS:
3352 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3353 break;
3354 default:
3355 ret = -EINVAL;
3356 break;
3357 }
3358 return ret;
3359 }
3360 EXPORT_SYMBOL(ib_cm_init_qp_attr);
3361
3362 static void cm_add_one(struct ib_device *device)
3363 {
3364 struct cm_device *cm_dev;
3365 struct cm_port *port;
3366 struct ib_mad_reg_req reg_req = {
3367 .mgmt_class = IB_MGMT_CLASS_CM,
3368 .mgmt_class_version = IB_CM_CLASS_VERSION
3369 };
3370 struct ib_port_modify port_modify = {
3371 .set_port_cap_mask = IB_PORT_CM_SUP
3372 };
3373 unsigned long flags;
3374 int ret;
3375 u8 i;
3376
3377 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
3378 return;
3379
3380 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3381 device->phys_port_cnt, GFP_KERNEL);
3382 if (!cm_dev)
3383 return;
3384
3385 cm_dev->device = device;
3386
3387 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3388 for (i = 1; i <= device->phys_port_cnt; i++) {
3389 port = &cm_dev->port[i-1];
3390 port->cm_dev = cm_dev;
3391 port->port_num = i;
3392 port->mad_agent = ib_register_mad_agent(device, i,
3393 IB_QPT_GSI,
3394 &reg_req,
3395 0,
3396 cm_send_handler,
3397 cm_recv_handler,
3398 port);
3399 if (IS_ERR(port->mad_agent))
3400 goto error1;
3401
3402 ret = ib_modify_port(device, i, 0, &port_modify);
3403 if (ret)
3404 goto error2;
3405 }
3406 ib_set_client_data(device, &cm_client, cm_dev);
3407
3408 write_lock_irqsave(&cm.device_lock, flags);
3409 list_add_tail(&cm_dev->list, &cm.device_list);
3410 write_unlock_irqrestore(&cm.device_lock, flags);
3411 return;
3412
3413 error2:
3414 ib_unregister_mad_agent(port->mad_agent);
3415 error1:
3416 port_modify.set_port_cap_mask = 0;
3417 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3418 while (--i) {
3419 port = &cm_dev->port[i-1];
3420 ib_modify_port(device, port->port_num, 0, &port_modify);
3421 ib_unregister_mad_agent(port->mad_agent);
3422 }
3423 kfree(cm_dev);
3424 }
3425
3426 static void cm_remove_one(struct ib_device *device)
3427 {
3428 struct cm_device *cm_dev;
3429 struct cm_port *port;
3430 struct ib_port_modify port_modify = {
3431 .clr_port_cap_mask = IB_PORT_CM_SUP
3432 };
3433 unsigned long flags;
3434 int i;
3435
3436 cm_dev = ib_get_client_data(device, &cm_client);
3437 if (!cm_dev)
3438 return;
3439
3440 write_lock_irqsave(&cm.device_lock, flags);
3441 list_del(&cm_dev->list);
3442 write_unlock_irqrestore(&cm.device_lock, flags);
3443
3444 for (i = 1; i <= device->phys_port_cnt; i++) {
3445 port = &cm_dev->port[i-1];
3446 ib_modify_port(device, port->port_num, 0, &port_modify);
3447 ib_unregister_mad_agent(port->mad_agent);
3448 }
3449 kfree(cm_dev);
3450 }
3451
3452 static int __init ib_cm_init(void)
3453 {
3454 int ret;
3455
3456 memset(&cm, 0, sizeof cm);
3457 INIT_LIST_HEAD(&cm.device_list);
3458 rwlock_init(&cm.device_lock);
3459 spin_lock_init(&cm.lock);
3460 cm.listen_service_table = RB_ROOT;
3461 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3462 cm.remote_id_table = RB_ROOT;
3463 cm.remote_qp_table = RB_ROOT;
3464 cm.remote_sidr_table = RB_ROOT;
3465 idr_init(&cm.local_id_table);
3466 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
3467 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
3468 INIT_LIST_HEAD(&cm.timewait_list);
3469
3470 cm.wq = create_workqueue("ib_cm");
3471 if (!cm.wq)
3472 return -ENOMEM;
3473
3474 ret = ib_register_client(&cm_client);
3475 if (ret)
3476 goto error;
3477
3478 return 0;
3479 error:
3480 destroy_workqueue(cm.wq);
3481 return ret;
3482 }
3483
3484 static void __exit ib_cm_cleanup(void)
3485 {
3486 struct cm_timewait_info *timewait_info, *tmp;
3487
3488 spin_lock_irq(&cm.lock);
3489 list_for_each_entry(timewait_info, &cm.timewait_list, list)
3490 cancel_delayed_work(&timewait_info->work.work);
3491 spin_unlock_irq(&cm.lock);
3492
3493 destroy_workqueue(cm.wq);
3494
3495 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
3496 list_del(&timewait_info->list);
3497 kfree(timewait_info);
3498 }
3499
3500 ib_unregister_client(&cm_client);
3501 idr_destroy(&cm.local_id_table);
3502 }
3503
3504 module_init(ib_cm_init);
3505 module_exit(ib_cm_cleanup);
3506
Mirror for ia64_pv_ops.git