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IPoIB: Fix skb leak when freeing neighbour
[deliverable/linux.git] / drivers / infiniband / core / cm.c
CommitLineData
a977049d 1/*
f06d2653 2 * Copyright (c) 2004-2006 Intel Corporation. All rights reserved.
a977049d
HR		 3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 *
6e61d04f 35 * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $
a977049d 36 */
1b52fa98
SH		 37
38#include <linux/completion.h>
a977049d
HR		 39#include <linux/dma-mapping.h>
40#include <linux/err.h>
41#include <linux/idr.h>
42#include <linux/interrupt.h>
43#include <linux/pci.h>
f06d2653 44#include <linux/random.h>
a977049d
HR		 45#include <linux/rbtree.h>
46#include <linux/spinlock.h>
47#include <linux/workqueue.h>
48
a4d61e84
RD		 49#include <rdma/ib_cache.h>
50#include <rdma/ib_cm.h>
a977049d
HR		 51#include "cm_msgs.h"
52
53MODULE_AUTHOR("Sean Hefty");
54MODULE_DESCRIPTION("InfiniBand CM");
55MODULE_LICENSE("Dual BSD/GPL");
56
57static void cm_add_one(struct ib_device *device);
58static void cm_remove_one(struct ib_device *device);
59
60static struct ib_client cm_client = {
61 .name = "cm",
62 .add = cm_add_one,
63 .remove = cm_remove_one
64};
65
66static struct ib_cm {
67 spinlock_t lock;
68 struct list_head device_list;
69 rwlock_t device_lock;
70 struct rb_root listen_service_table;
71 u64 listen_service_id;
72 /* struct rb_root peer_service_table; todo: fix peer to peer */
73 struct rb_root remote_qp_table;
74 struct rb_root remote_id_table;
75 struct rb_root remote_sidr_table;
76 struct idr local_id_table;
f06d2653 77 __be32 random_id_operand;
8575329d 78 struct list_head timewait_list;
a977049d
HR		 79 struct workqueue_struct *wq;
80} cm;
81
82struct cm_port {
83 struct cm_device *cm_dev;
84 struct ib_mad_agent *mad_agent;
85 u8 port_num;
86};
87
88struct cm_device {
89 struct list_head list;
90 struct ib_device *device;
97f52eb4 91 __be64 ca_guid;
a977049d
HR		 92 struct cm_port port[0];
93};
94
95struct cm_av {
96 struct cm_port *port;
97 union ib_gid dgid;
98 struct ib_ah_attr ah_attr;
99 u16 pkey_index;
100 u8 packet_life_time;
101};
102
103struct cm_work {
104 struct work_struct work;
105 struct list_head list;
106 struct cm_port *port;
107 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
97f52eb4
SH		 108 __be32 local_id; /* Established / timewait */
109 __be32 remote_id;
a977049d
HR		 110 struct ib_cm_event cm_event;
111 struct ib_sa_path_rec path[0];
112};
113
114struct cm_timewait_info {
115 struct cm_work work; /* Must be first. */
8575329d 116 struct list_head list;
a977049d
HR		 117 struct rb_node remote_qp_node;
118 struct rb_node remote_id_node;
97f52eb4
SH		 119 __be64 remote_ca_guid;
120 __be32 remote_qpn;
a977049d
HR		 121 u8 inserted_remote_qp;
122 u8 inserted_remote_id;
123};
124
125struct cm_id_private {
126 struct ib_cm_id id;
127
128 struct rb_node service_node;
129 struct rb_node sidr_id_node;
87fd1a11 130 spinlock_t lock; /* Do not acquire inside cm.lock */
1b52fa98 131 struct completion comp;
a977049d
HR		 132 atomic_t refcount;
133
134 struct ib_mad_send_buf *msg;
135 struct cm_timewait_info *timewait_info;
136 /* todo: use alternate port on send failure */
137 struct cm_av av;
138 struct cm_av alt_av;
6e61d04f 139 struct ib_cm_compare_data *compare_data;
a977049d
HR		 140
141 void *private_data;
97f52eb4
SH		 142 __be64 tid;
143 __be32 local_qpn;
144 __be32 remote_qpn;
ae7971a7 145 enum ib_qp_type qp_type;
97f52eb4
SH		 146 __be32 sq_psn;
147 __be32 rq_psn;
a977049d
HR		 148 int timeout_ms;
149 enum ib_mtu path_mtu;
150 u8 private_data_len;
151 u8 max_cm_retries;
152 u8 peer_to_peer;
153 u8 responder_resources;
154 u8 initiator_depth;
155 u8 local_ack_timeout;
156 u8 retry_count;
157 u8 rnr_retry_count;
158 u8 service_timeout;
159
160 struct list_head work_list;
161 atomic_t work_count;
162};
163
164static void cm_work_handler(void *data);
165
166static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
167{
168 if (atomic_dec_and_test(&cm_id_priv->refcount))
1b52fa98 169 complete(&cm_id_priv->comp);
a977049d
HR		 170}
171
172static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
173 struct ib_mad_send_buf **msg)
174{
175 struct ib_mad_agent *mad_agent;
176 struct ib_mad_send_buf *m;
177 struct ib_ah *ah;
178
179 mad_agent = cm_id_priv->av.port->mad_agent;
180 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
181 if (IS_ERR(ah))
182 return PTR_ERR(ah);
183
3cd96564 184 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
354ba39c 185 cm_id_priv->av.pkey_index,
34816ad9 186 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 187 GFP_ATOMIC);
188 if (IS_ERR(m)) {
189 ib_destroy_ah(ah);
190 return PTR_ERR(m);
191 }
192
193 /* Timeout set by caller if response is expected. */
34816ad9
SH		 194 m->ah = ah;
195 m->retries = cm_id_priv->max_cm_retries;
a977049d
HR		 196
197 atomic_inc(&cm_id_priv->refcount);
198 m->context[0] = cm_id_priv;
199 *msg = m;
200 return 0;
201}
202
203static int cm_alloc_response_msg(struct cm_port *port,
204 struct ib_mad_recv_wc *mad_recv_wc,
205 struct ib_mad_send_buf **msg)
206{
207 struct ib_mad_send_buf *m;
208 struct ib_ah *ah;
209
210 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
211 mad_recv_wc->recv_buf.grh, port->port_num);
212 if (IS_ERR(ah))
213 return PTR_ERR(ah);
214
215 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
34816ad9 216 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 217 GFP_ATOMIC);
218 if (IS_ERR(m)) {
219 ib_destroy_ah(ah);
220 return PTR_ERR(m);
221 }
34816ad9 222 m->ah = ah;
a977049d
HR		 223 *msg = m;
224 return 0;
225}
226
227static void cm_free_msg(struct ib_mad_send_buf *msg)
228{
34816ad9 229 ib_destroy_ah(msg->ah);
a977049d
HR		 230 if (msg->context[0])
231 cm_deref_id(msg->context[0]);
232 ib_free_send_mad(msg);
233}
234
235static void * cm_copy_private_data(const void *private_data,
236 u8 private_data_len)
237{
238 void *data;
239
240 if (!private_data || !private_data_len)
241 return NULL;
242
bed8bdfd 243 data = kmemdup(private_data, private_data_len, GFP_KERNEL);
a977049d
HR		 244 if (!data)
245 return ERR_PTR(-ENOMEM);
246
a977049d
HR		 247 return data;
248}
249
250static void cm_set_private_data(struct cm_id_private *cm_id_priv,
251 void *private_data, u8 private_data_len)
252{
253 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
254 kfree(cm_id_priv->private_data);
255
256 cm_id_priv->private_data = private_data;
257 cm_id_priv->private_data_len = private_data_len;
258}
259
ca222c6b
SH		 260static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
261 struct ib_grh *grh, struct cm_av *av)
a977049d
HR		 262{
263 av->port = port;
264 av->pkey_index = wc->pkey_index;
ca222c6b
SH		 265 ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc,
266 grh, &av->ah_attr);
a977049d
HR		 267}
268
269static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
270{
271 struct cm_device *cm_dev;
272 struct cm_port *port = NULL;
273 unsigned long flags;
274 int ret;
275 u8 p;
276
277 read_lock_irqsave(&cm.device_lock, flags);
278 list_for_each_entry(cm_dev, &cm.device_list, list) {
279 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
280 &p, NULL)) {
281 port = &cm_dev->port[p-1];
282 break;
283 }
284 }
285 read_unlock_irqrestore(&cm.device_lock, flags);
286
287 if (!port)
288 return -EINVAL;
289
290 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
291 be16_to_cpu(path->pkey), &av->pkey_index);
292 if (ret)
293 return ret;
294
295 av->port = port;
ca222c6b
SH		 296 ib_init_ah_from_path(cm_dev->device, port->port_num, path,
297 &av->ah_attr);
a977049d
HR		 298 av->packet_life_time = path->packet_life_time;
299 return 0;
300}
301
302static int cm_alloc_id(struct cm_id_private *cm_id_priv)
303{
304 unsigned long flags;
f06d2653 305 int ret, id;
de1bb1a6 306 static int next_id;
a977049d
HR		 307
308 do {
309 spin_lock_irqsave(&cm.lock, flags);
f06d2653
SH		 310 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv,
311 next_id++, &id);
a977049d
HR		 312 spin_unlock_irqrestore(&cm.lock, flags);
313 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
f06d2653
SH		 314
315 cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand);
a977049d
HR		 316 return ret;
317}
318
97f52eb4 319static void cm_free_id(__be32 local_id)
a977049d
HR		 320{
321 unsigned long flags;
322
323 spin_lock_irqsave(&cm.lock, flags);
f06d2653
SH		 324 idr_remove(&cm.local_id_table,
325 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 326 spin_unlock_irqrestore(&cm.lock, flags);
327}
328
97f52eb4 329static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 330{
331 struct cm_id_private *cm_id_priv;
332
f06d2653
SH		 333 cm_id_priv = idr_find(&cm.local_id_table,
334 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 335 if (cm_id_priv) {
336 if (cm_id_priv->id.remote_id == remote_id)
337 atomic_inc(&cm_id_priv->refcount);
338 else
339 cm_id_priv = NULL;
340 }
341
342 return cm_id_priv;
343}
344
97f52eb4 345static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 346{
347 struct cm_id_private *cm_id_priv;
348 unsigned long flags;
349
350 spin_lock_irqsave(&cm.lock, flags);
351 cm_id_priv = cm_get_id(local_id, remote_id);
352 spin_unlock_irqrestore(&cm.lock, flags);
353
354 return cm_id_priv;
355}
356
6e61d04f
SH		 357static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
358{
359 int i;
360
361 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
362 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
363 ((unsigned long *) mask)[i];
364}
365
366static int cm_compare_data(struct ib_cm_compare_data *src_data,
367 struct ib_cm_compare_data *dst_data)
368{
369 u8 src[IB_CM_COMPARE_SIZE];
370 u8 dst[IB_CM_COMPARE_SIZE];
371
372 if (!src_data || !dst_data)
373 return 0;
374
375 cm_mask_copy(src, src_data->data, dst_data->mask);
376 cm_mask_copy(dst, dst_data->data, src_data->mask);
377 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
378}
379
380static int cm_compare_private_data(u8 *private_data,
381 struct ib_cm_compare_data *dst_data)
382{
383 u8 src[IB_CM_COMPARE_SIZE];
384
385 if (!dst_data)
386 return 0;
387
388 cm_mask_copy(src, private_data, dst_data->mask);
389 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
390}
391
a977049d
HR		 392static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
393{
394 struct rb_node **link = &cm.listen_service_table.rb_node;
395 struct rb_node *parent = NULL;
396 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 397 __be64 service_id = cm_id_priv->id.service_id;
398 __be64 service_mask = cm_id_priv->id.service_mask;
6e61d04f 399 int data_cmp;
a977049d
HR		 400
401 while (*link) {
402 parent = *link;
403 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
404 service_node);
6e61d04f
SH		 405 data_cmp = cm_compare_data(cm_id_priv->compare_data,
406 cur_cm_id_priv->compare_data);
a977049d 407 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0 408 (service_mask & cur_cm_id_priv->id.service_id) &&
6e61d04f
SH		 409 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
410 !data_cmp)
07d357d0
SH		 411 return cur_cm_id_priv;
412
413 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
414 link = &(*link)->rb_left;
415 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
416 link = &(*link)->rb_right;
417 else if (service_id < cur_cm_id_priv->id.service_id)
a977049d 418 link = &(*link)->rb_left;
6e61d04f
SH		 419 else if (service_id > cur_cm_id_priv->id.service_id)
420 link = &(*link)->rb_right;
421 else if (data_cmp < 0)
422 link = &(*link)->rb_left;
a977049d
HR		 423 else
424 link = &(*link)->rb_right;
425 }
426 rb_link_node(&cm_id_priv->service_node, parent, link);
427 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
428 return NULL;
429}
430
07d357d0 431static struct cm_id_private * cm_find_listen(struct ib_device *device,
6e61d04f
SH		 432 __be64 service_id,
433 u8 *private_data)
a977049d
HR		 434{
435 struct rb_node *node = cm.listen_service_table.rb_node;
436 struct cm_id_private *cm_id_priv;
6e61d04f 437 int data_cmp;
a977049d
HR		 438
439 while (node) {
440 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
6e61d04f
SH		 441 data_cmp = cm_compare_private_data(private_data,
442 cm_id_priv->compare_data);
a977049d 443 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0 444 cm_id_priv->id.service_id &&
6e61d04f 445 (cm_id_priv->id.device == device) && !data_cmp)
a977049d 446 return cm_id_priv;
07d357d0
SH		 447
448 if (device < cm_id_priv->id.device)
449 node = node->rb_left;
450 else if (device > cm_id_priv->id.device)
451 node = node->rb_right;
452 else if (service_id < cm_id_priv->id.service_id)
a977049d 453 node = node->rb_left;
6e61d04f
SH		 454 else if (service_id > cm_id_priv->id.service_id)
455 node = node->rb_right;
456 else if (data_cmp < 0)
457 node = node->rb_left;
a977049d
HR		 458 else
459 node = node->rb_right;
460 }
461 return NULL;
462}
463
464static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
465 *timewait_info)
466{
467 struct rb_node **link = &cm.remote_id_table.rb_node;
468 struct rb_node *parent = NULL;
469 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 470 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
471 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 472
473 while (*link) {
474 parent = *link;
475 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
476 remote_id_node);
477 if (remote_id < cur_timewait_info->work.remote_id)
478 link = &(*link)->rb_left;
479 else if (remote_id > cur_timewait_info->work.remote_id)
480 link = &(*link)->rb_right;
481 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
482 link = &(*link)->rb_left;
483 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
484 link = &(*link)->rb_right;
485 else
486 return cur_timewait_info;
487 }
488 timewait_info->inserted_remote_id = 1;
489 rb_link_node(&timewait_info->remote_id_node, parent, link);
490 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
491 return NULL;
492}
493
97f52eb4
SH		 494static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
495 __be32 remote_id)
a977049d
HR		 496{
497 struct rb_node *node = cm.remote_id_table.rb_node;
498 struct cm_timewait_info *timewait_info;
499
500 while (node) {
501 timewait_info = rb_entry(node, struct cm_timewait_info,
502 remote_id_node);
503 if (remote_id < timewait_info->work.remote_id)
504 node = node->rb_left;
505 else if (remote_id > timewait_info->work.remote_id)
506 node = node->rb_right;
507 else if (remote_ca_guid < timewait_info->remote_ca_guid)
508 node = node->rb_left;
509 else if (remote_ca_guid > timewait_info->remote_ca_guid)
510 node = node->rb_right;
511 else
512 return timewait_info;
513 }
514 return NULL;
515}
516
517static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
518 *timewait_info)
519{
520 struct rb_node **link = &cm.remote_qp_table.rb_node;
521 struct rb_node *parent = NULL;
522 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 523 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
524 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 525
526 while (*link) {
527 parent = *link;
528 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
529 remote_qp_node);
530 if (remote_qpn < cur_timewait_info->remote_qpn)
531 link = &(*link)->rb_left;
532 else if (remote_qpn > cur_timewait_info->remote_qpn)
533 link = &(*link)->rb_right;
534 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
535 link = &(*link)->rb_left;
536 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
537 link = &(*link)->rb_right;
538 else
539 return cur_timewait_info;
540 }
541 timewait_info->inserted_remote_qp = 1;
542 rb_link_node(&timewait_info->remote_qp_node, parent, link);
543 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
544 return NULL;
545}
546
547static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
548 *cm_id_priv)
549{
550 struct rb_node **link = &cm.remote_sidr_table.rb_node;
551 struct rb_node *parent = NULL;
552 struct cm_id_private *cur_cm_id_priv;
553 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 554 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 555
556 while (*link) {
557 parent = *link;
558 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
559 sidr_id_node);
560 if (remote_id < cur_cm_id_priv->id.remote_id)
561 link = &(*link)->rb_left;
562 else if (remote_id > cur_cm_id_priv->id.remote_id)
563 link = &(*link)->rb_right;
564 else {
565 int cmp;
566 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
567 sizeof *port_gid);
568 if (cmp < 0)
569 link = &(*link)->rb_left;
570 else if (cmp > 0)
571 link = &(*link)->rb_right;
572 else
573 return cur_cm_id_priv;
574 }
575 }
576 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
577 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
578 return NULL;
579}
580
581static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
582 enum ib_cm_sidr_status status)
583{
584 struct ib_cm_sidr_rep_param param;
585
586 memset(&param, 0, sizeof param);
587 param.status = status;
588 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
589}
590
07d357d0
SH		 591struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
592 ib_cm_handler cm_handler,
a977049d
HR		 593 void *context)
594{
595 struct cm_id_private *cm_id_priv;
596 int ret;
597
de6eb66b 598 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
a977049d
HR		 599 if (!cm_id_priv)
600 return ERR_PTR(-ENOMEM);
601
a977049d 602 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 603 cm_id_priv->id.device = device;
a977049d
HR		 604 cm_id_priv->id.cm_handler = cm_handler;
605 cm_id_priv->id.context = context;
354ba39c 606 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 607 ret = cm_alloc_id(cm_id_priv);
608 if (ret)
609 goto error;
610
611 spin_lock_init(&cm_id_priv->lock);
1b52fa98 612 init_completion(&cm_id_priv->comp);
a977049d
HR		 613 INIT_LIST_HEAD(&cm_id_priv->work_list);
614 atomic_set(&cm_id_priv->work_count, -1);
615 atomic_set(&cm_id_priv->refcount, 1);
616 return &cm_id_priv->id;
617
618error:
619 kfree(cm_id_priv);
620 return ERR_PTR(-ENOMEM);
621}
622EXPORT_SYMBOL(ib_create_cm_id);
623
624static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
625{
626 struct cm_work *work;
627
628 if (list_empty(&cm_id_priv->work_list))
629 return NULL;
630
631 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
632 list_del(&work->list);
633 return work;
634}
635
636static void cm_free_work(struct cm_work *work)
637{
638 if (work->mad_recv_wc)
639 ib_free_recv_mad(work->mad_recv_wc);
640 kfree(work);
641}
642
643static inline int cm_convert_to_ms(int iba_time)
644{
645 /* approximate conversion to ms from 4.096us x 2^iba_time */
646 return 1 << max(iba_time - 8, 0);
647}
648
649static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
650{
a977049d
HR		 651 if (timewait_info->inserted_remote_id) {
652 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
653 timewait_info->inserted_remote_id = 0;
654 }
655
656 if (timewait_info->inserted_remote_qp) {
657 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
658 timewait_info->inserted_remote_qp = 0;
659 }
a977049d
HR		 660}
661
97f52eb4 662static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 663{
664 struct cm_timewait_info *timewait_info;
665
de6eb66b 666 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
a977049d
HR		 667 if (!timewait_info)
668 return ERR_PTR(-ENOMEM);
a977049d
HR		 669
670 timewait_info->work.local_id = local_id;
671 INIT_WORK(&timewait_info->work.work, cm_work_handler,
672 &timewait_info->work);
673 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
674 return timewait_info;
675}
676
677static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
678{
679 int wait_time;
8575329d 680 unsigned long flags;
a977049d 681
8575329d 682 spin_lock_irqsave(&cm.lock, flags);
a70d0590 683 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d
SH		 684 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
685 spin_unlock_irqrestore(&cm.lock, flags);
a70d0590 686
a977049d
HR		 687 /*
688 * The cm_id could be destroyed by the user before we exit timewait.
689 * To protect against this, we search for the cm_id after exiting
690 * timewait before notifying the user that we've exited timewait.
691 */
692 cm_id_priv->id.state = IB_CM_TIMEWAIT;
693 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
694 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
695 msecs_to_jiffies(wait_time));
696 cm_id_priv->timewait_info = NULL;
697}
698
699static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
700{
8575329d
SH		 701 unsigned long flags;
702
a977049d
HR		 703 cm_id_priv->id.state = IB_CM_IDLE;
704 if (cm_id_priv->timewait_info) {
8575329d 705 spin_lock_irqsave(&cm.lock, flags);
a977049d 706 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d 707 spin_unlock_irqrestore(&cm.lock, flags);
a977049d
HR		 708 kfree(cm_id_priv->timewait_info);
709 cm_id_priv->timewait_info = NULL;
710 }
711}
712
04c33543 713static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
a977049d
HR		 714{
715 struct cm_id_private *cm_id_priv;
716 struct cm_work *work;
717 unsigned long flags;
718
719 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
720retest:
721 spin_lock_irqsave(&cm_id_priv->lock, flags);
722 switch (cm_id->state) {
723 case IB_CM_LISTEN:
724 cm_id->state = IB_CM_IDLE;
725 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
726 spin_lock_irqsave(&cm.lock, flags);
727 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
728 spin_unlock_irqrestore(&cm.lock, flags);
729 break;
730 case IB_CM_SIDR_REQ_SENT:
731 cm_id->state = IB_CM_IDLE;
34816ad9 732 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 733 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
734 break;
735 case IB_CM_SIDR_REQ_RCVD:
736 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
737 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
738 break;
739 case IB_CM_REQ_SENT:
227eca83
SH		 740 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
741 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
742 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
743 &cm_id_priv->av.port->cm_dev->ca_guid,
744 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
745 NULL, 0);
746 break;
04c33543
MT		 747 case IB_CM_REQ_RCVD:
748 if (err == -ENOMEM) {
749 /* Do not reject to allow future retries. */
750 cm_reset_to_idle(cm_id_priv);
751 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
752 } else {
753 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
754 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
755 NULL, 0, NULL, 0);
756 }
757 break;
a977049d
HR		 758 case IB_CM_MRA_REQ_RCVD:
759 case IB_CM_REP_SENT:
760 case IB_CM_MRA_REP_RCVD:
34816ad9 761 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 762 /* Fall through */
a977049d
HR		 763 case IB_CM_MRA_REQ_SENT:
764 case IB_CM_REP_RCVD:
765 case IB_CM_MRA_REP_SENT:
766 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
227eca83
SH		 767 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
768 NULL, 0, NULL, 0);
a977049d
HR		 769 break;
770 case IB_CM_ESTABLISHED:
771 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
772 ib_send_cm_dreq(cm_id, NULL, 0);
773 goto retest;
774 case IB_CM_DREQ_SENT:
34816ad9 775 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 776 cm_enter_timewait(cm_id_priv);
777 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
778 break;
779 case IB_CM_DREQ_RCVD:
780 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
781 ib_send_cm_drep(cm_id, NULL, 0);
782 break;
783 default:
784 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
785 break;
786 }
787
788 cm_free_id(cm_id->local_id);
1b52fa98
SH		 789 cm_deref_id(cm_id_priv);
790 wait_for_completion(&cm_id_priv->comp);
a977049d
HR		 791 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
792 cm_free_work(work);
6e61d04f
SH		 793 kfree(cm_id_priv->compare_data);
794 kfree(cm_id_priv->private_data);
a977049d
HR		 795 kfree(cm_id_priv);
796}
04c33543
MT		 797
798void ib_destroy_cm_id(struct ib_cm_id *cm_id)
799{
800 cm_destroy_id(cm_id, 0);
801}
a977049d
HR		 802EXPORT_SYMBOL(ib_destroy_cm_id);
803
6e61d04f
SH		 804int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
805 struct ib_cm_compare_data *compare_data)
a977049d
HR		 806{
807 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
808 unsigned long flags;
809 int ret = 0;
810
97f52eb4
SH		 811 service_mask = service_mask ? service_mask :
812 __constant_cpu_to_be64(~0ULL);
a977049d
HR		 813 service_id &= service_mask;
814 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
815 (service_id != IB_CM_ASSIGN_SERVICE_ID))
816 return -EINVAL;
817
818 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
6e61d04f
SH		 819 if (cm_id->state != IB_CM_IDLE)
820 return -EINVAL;
821
822 if (compare_data) {
823 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
824 GFP_KERNEL);
825 if (!cm_id_priv->compare_data)
826 return -ENOMEM;
827 cm_mask_copy(cm_id_priv->compare_data->data,
828 compare_data->data, compare_data->mask);
829 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
830 IB_CM_COMPARE_SIZE);
831 }
a977049d
HR		 832
833 cm_id->state = IB_CM_LISTEN;
834
835 spin_lock_irqsave(&cm.lock, flags);
836 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
97f52eb4
SH		 837 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
838 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 839 } else {
840 cm_id->service_id = service_id;
841 cm_id->service_mask = service_mask;
842 }
843 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
844 spin_unlock_irqrestore(&cm.lock, flags);
845
846 if (cur_cm_id_priv) {
847 cm_id->state = IB_CM_IDLE;
6e61d04f
SH		 848 kfree(cm_id_priv->compare_data);
849 cm_id_priv->compare_data = NULL;
a977049d
HR		 850 ret = -EBUSY;
851 }
852 return ret;
853}
854EXPORT_SYMBOL(ib_cm_listen);
855
97f52eb4
SH		 856static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
857 enum cm_msg_sequence msg_seq)
a977049d
HR		 858{
859 u64 hi_tid, low_tid;
860
861 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
97f52eb4
SH		 862 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
863 (msg_seq << 30));
a977049d
HR		 864 return cpu_to_be64(hi_tid | low_tid);
865}
866
867static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 868 __be16 attr_id, __be64 tid)
a977049d
HR		 869{
870 hdr->base_version = IB_MGMT_BASE_VERSION;
871 hdr->mgmt_class = IB_MGMT_CLASS_CM;
872 hdr->class_version = IB_CM_CLASS_VERSION;
873 hdr->method = IB_MGMT_METHOD_SEND;
874 hdr->attr_id = attr_id;
875 hdr->tid = tid;
876}
877
878static void cm_format_req(struct cm_req_msg *req_msg,
879 struct cm_id_private *cm_id_priv,
880 struct ib_cm_req_param *param)
881{
882 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
883 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
884
885 req_msg->local_comm_id = cm_id_priv->id.local_id;
886 req_msg->service_id = param->service_id;
887 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
888 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
889 cm_req_set_resp_res(req_msg, param->responder_resources);
890 cm_req_set_init_depth(req_msg, param->initiator_depth);
891 cm_req_set_remote_resp_timeout(req_msg,
892 param->remote_cm_response_timeout);
893 cm_req_set_qp_type(req_msg, param->qp_type);
894 cm_req_set_flow_ctrl(req_msg, param->flow_control);
895 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
896 cm_req_set_local_resp_timeout(req_msg,
897 param->local_cm_response_timeout);
898 cm_req_set_retry_count(req_msg, param->retry_count);
899 req_msg->pkey = param->primary_path->pkey;
900 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
901 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
902 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
903 cm_req_set_srq(req_msg, param->srq);
904
905 req_msg->primary_local_lid = param->primary_path->slid;
906 req_msg->primary_remote_lid = param->primary_path->dlid;
907 req_msg->primary_local_gid = param->primary_path->sgid;
908 req_msg->primary_remote_gid = param->primary_path->dgid;
909 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
910 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
911 req_msg->primary_traffic_class = param->primary_path->traffic_class;
912 req_msg->primary_hop_limit = param->primary_path->hop_limit;
913 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
914 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
915 cm_req_set_primary_local_ack_timeout(req_msg,
916 min(31, param->primary_path->packet_life_time + 1));
917
918 if (param->alternate_path) {
919 req_msg->alt_local_lid = param->alternate_path->slid;
920 req_msg->alt_remote_lid = param->alternate_path->dlid;
921 req_msg->alt_local_gid = param->alternate_path->sgid;
922 req_msg->alt_remote_gid = param->alternate_path->dgid;
923 cm_req_set_alt_flow_label(req_msg,
924 param->alternate_path->flow_label);
925 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
926 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
927 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
928 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
929 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
930 cm_req_set_alt_local_ack_timeout(req_msg,
931 min(31, param->alternate_path->packet_life_time + 1));
932 }
933
934 if (param->private_data && param->private_data_len)
935 memcpy(req_msg->private_data, param->private_data,
936 param->private_data_len);
937}
938
858119e1 939static int cm_validate_req_param(struct ib_cm_req_param *param)
a977049d
HR		 940{
941 /* peer-to-peer not supported */
942 if (param->peer_to_peer)
943 return -EINVAL;
944
945 if (!param->primary_path)
946 return -EINVAL;
947
948 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
949 return -EINVAL;
950
951 if (param->private_data &&
952 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
953 return -EINVAL;
954
955 if (param->alternate_path &&
956 (param->alternate_path->pkey != param->primary_path->pkey ||
957 param->alternate_path->mtu != param->primary_path->mtu))
958 return -EINVAL;
959
960 return 0;
961}
962
963int ib_send_cm_req(struct ib_cm_id *cm_id,
964 struct ib_cm_req_param *param)
965{
966 struct cm_id_private *cm_id_priv;
a977049d
HR		 967 struct cm_req_msg *req_msg;
968 unsigned long flags;
969 int ret;
970
971 ret = cm_validate_req_param(param);
972 if (ret)
973 return ret;
974
975 /* Verify that we're not in timewait. */
976 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
977 spin_lock_irqsave(&cm_id_priv->lock, flags);
978 if (cm_id->state != IB_CM_IDLE) {
979 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
980 ret = -EINVAL;
981 goto out;
982 }
983 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
984
985 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
986 id.local_id);
75df23e2
SH		 987 if (IS_ERR(cm_id_priv->timewait_info)) {
988 ret = PTR_ERR(cm_id_priv->timewait_info);
a977049d 989 goto out;
75df23e2 990 }
a977049d
HR		 991
992 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
993 if (ret)
994 goto error1;
995 if (param->alternate_path) {
996 ret = cm_init_av_by_path(param->alternate_path,
997 &cm_id_priv->alt_av);
998 if (ret)
999 goto error1;
1000 }
1001 cm_id->service_id = param->service_id;
97f52eb4 1002 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1003 cm_id_priv->timeout_ms = cm_convert_to_ms(
1004 param->primary_path->packet_life_time) * 2 +
1005 cm_convert_to_ms(
1006 param->remote_cm_response_timeout);
1007 cm_id_priv->max_cm_retries = param->max_cm_retries;
1008 cm_id_priv->initiator_depth = param->initiator_depth;
1009 cm_id_priv->responder_resources = param->responder_resources;
1010 cm_id_priv->retry_count = param->retry_count;
1011 cm_id_priv->path_mtu = param->primary_path->mtu;
ae7971a7 1012 cm_id_priv->qp_type = param->qp_type;
a977049d
HR		 1013
1014 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1015 if (ret)
1016 goto error1;
1017
1018 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1019 cm_format_req(req_msg, cm_id_priv, param);
1020 cm_id_priv->tid = req_msg->hdr.tid;
34816ad9 1021 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1022 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1023
1024 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1025 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
1026 cm_id_priv->local_ack_timeout =
1027 cm_req_get_primary_local_ack_timeout(req_msg);
1028
1029 spin_lock_irqsave(&cm_id_priv->lock, flags);
34816ad9 1030 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
a977049d
HR		 1031 if (ret) {
1032 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1033 goto error2;
1034 }
1035 BUG_ON(cm_id->state != IB_CM_IDLE);
1036 cm_id->state = IB_CM_REQ_SENT;
1037 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1038 return 0;
1039
1040error2: cm_free_msg(cm_id_priv->msg);
1041error1: kfree(cm_id_priv->timewait_info);
1042out: return ret;
1043}
1044EXPORT_SYMBOL(ib_send_cm_req);
1045
1046static int cm_issue_rej(struct cm_port *port,
1047 struct ib_mad_recv_wc *mad_recv_wc,
1048 enum ib_cm_rej_reason reason,
1049 enum cm_msg_response msg_rejected,
1050 void *ari, u8 ari_length)
1051{
1052 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1053 struct cm_rej_msg *rej_msg, *rcv_msg;
1054 int ret;
1055
1056 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1057 if (ret)
1058 return ret;
1059
1060 /* We just need common CM header information. Cast to any message. */
1061 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1062 rej_msg = (struct cm_rej_msg *) msg->mad;
1063
1064 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1065 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1066 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1067 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 1068 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1069
1070 if (ari && ari_length) {
1071 cm_rej_set_reject_info_len(rej_msg, ari_length);
1072 memcpy(rej_msg->ari, ari, ari_length);
1073 }
1074
34816ad9 1075 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1076 if (ret)
1077 cm_free_msg(msg);
1078
1079 return ret;
1080}
1081
97f52eb4
SH		 1082static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1083 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 1084{
1085 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1086 ((local_ca_guid == remote_ca_guid) &&
1087 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1088}
1089
858119e1 1090static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
a977049d
HR		 1091 struct ib_sa_path_rec *primary_path,
1092 struct ib_sa_path_rec *alt_path)
1093{
1094 memset(primary_path, 0, sizeof *primary_path);
1095 primary_path->dgid = req_msg->primary_local_gid;
1096 primary_path->sgid = req_msg->primary_remote_gid;
1097 primary_path->dlid = req_msg->primary_local_lid;
1098 primary_path->slid = req_msg->primary_remote_lid;
1099 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1100 primary_path->hop_limit = req_msg->primary_hop_limit;
1101 primary_path->traffic_class = req_msg->primary_traffic_class;
1102 primary_path->reversible = 1;
1103 primary_path->pkey = req_msg->pkey;
1104 primary_path->sl = cm_req_get_primary_sl(req_msg);
1105 primary_path->mtu_selector = IB_SA_EQ;
1106 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1107 primary_path->rate_selector = IB_SA_EQ;
1108 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1109 primary_path->packet_life_time_selector = IB_SA_EQ;
1110 primary_path->packet_life_time =
1111 cm_req_get_primary_local_ack_timeout(req_msg);
1112 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1113
1114 if (req_msg->alt_local_lid) {
1115 memset(alt_path, 0, sizeof *alt_path);
1116 alt_path->dgid = req_msg->alt_local_gid;
1117 alt_path->sgid = req_msg->alt_remote_gid;
1118 alt_path->dlid = req_msg->alt_local_lid;
1119 alt_path->slid = req_msg->alt_remote_lid;
1120 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1121 alt_path->hop_limit = req_msg->alt_hop_limit;
1122 alt_path->traffic_class = req_msg->alt_traffic_class;
1123 alt_path->reversible = 1;
1124 alt_path->pkey = req_msg->pkey;
1125 alt_path->sl = cm_req_get_alt_sl(req_msg);
1126 alt_path->mtu_selector = IB_SA_EQ;
1127 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1128 alt_path->rate_selector = IB_SA_EQ;
1129 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1130 alt_path->packet_life_time_selector = IB_SA_EQ;
1131 alt_path->packet_life_time =
1132 cm_req_get_alt_local_ack_timeout(req_msg);
1133 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1134 }
1135}
1136
1137static void cm_format_req_event(struct cm_work *work,
1138 struct cm_id_private *cm_id_priv,
1139 struct ib_cm_id *listen_id)
1140{
1141 struct cm_req_msg *req_msg;
1142 struct ib_cm_req_event_param *param;
1143
1144 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1145 param = &work->cm_event.param.req_rcvd;
1146 param->listen_id = listen_id;
a977049d
HR		 1147 param->port = cm_id_priv->av.port->port_num;
1148 param->primary_path = &work->path[0];
1149 if (req_msg->alt_local_lid)
1150 param->alternate_path = &work->path[1];
1151 else
1152 param->alternate_path = NULL;
1153 param->remote_ca_guid = req_msg->local_ca_guid;
1154 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1155 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1156 param->qp_type = cm_req_get_qp_type(req_msg);
1157 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1158 param->responder_resources = cm_req_get_init_depth(req_msg);
1159 param->initiator_depth = cm_req_get_resp_res(req_msg);
1160 param->local_cm_response_timeout =
1161 cm_req_get_remote_resp_timeout(req_msg);
1162 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1163 param->remote_cm_response_timeout =
1164 cm_req_get_local_resp_timeout(req_msg);
1165 param->retry_count = cm_req_get_retry_count(req_msg);
1166 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1167 param->srq = cm_req_get_srq(req_msg);
1168 work->cm_event.private_data = &req_msg->private_data;
1169}
1170
1171static void cm_process_work(struct cm_id_private *cm_id_priv,
1172 struct cm_work *work)
1173{
1174 unsigned long flags;
1175 int ret;
1176
1177 /* We will typically only have the current event to report. */
1178 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1179 cm_free_work(work);
1180
1181 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1182 spin_lock_irqsave(&cm_id_priv->lock, flags);
1183 work = cm_dequeue_work(cm_id_priv);
1184 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1185 BUG_ON(!work);
1186 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1187 &work->cm_event);
1188 cm_free_work(work);
1189 }
1190 cm_deref_id(cm_id_priv);
1191 if (ret)
04c33543 1192 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 1193}
1194
1195static void cm_format_mra(struct cm_mra_msg *mra_msg,
1196 struct cm_id_private *cm_id_priv,
1197 enum cm_msg_response msg_mraed, u8 service_timeout,
1198 const void *private_data, u8 private_data_len)
1199{
1200 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1201 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1202 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1203 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1204 cm_mra_set_service_timeout(mra_msg, service_timeout);
1205
1206 if (private_data && private_data_len)
1207 memcpy(mra_msg->private_data, private_data, private_data_len);
1208}
1209
1210static void cm_format_rej(struct cm_rej_msg *rej_msg,
1211 struct cm_id_private *cm_id_priv,
1212 enum ib_cm_rej_reason reason,
1213 void *ari,
1214 u8 ari_length,
1215 const void *private_data,
1216 u8 private_data_len)
1217{
1218 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1219 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1220
1221 switch(cm_id_priv->id.state) {
1222 case IB_CM_REQ_RCVD:
1223 rej_msg->local_comm_id = 0;
1224 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1225 break;
1226 case IB_CM_MRA_REQ_SENT:
1227 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1228 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1229 break;
1230 case IB_CM_REP_RCVD:
1231 case IB_CM_MRA_REP_SENT:
1232 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1233 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1234 break;
1235 default:
1236 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1237 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1238 break;
1239 }
1240
97f52eb4 1241 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1242 if (ari && ari_length) {
1243 cm_rej_set_reject_info_len(rej_msg, ari_length);
1244 memcpy(rej_msg->ari, ari, ari_length);
1245 }
1246
1247 if (private_data && private_data_len)
1248 memcpy(rej_msg->private_data, private_data, private_data_len);
1249}
1250
1251static void cm_dup_req_handler(struct cm_work *work,
1252 struct cm_id_private *cm_id_priv)
1253{
1254 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1255 unsigned long flags;
1256 int ret;
1257
1258 /* Quick state check to discard duplicate REQs. */
1259 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1260 return;
1261
1262 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1263 if (ret)
1264 return;
1265
1266 spin_lock_irqsave(&cm_id_priv->lock, flags);
1267 switch (cm_id_priv->id.state) {
1268 case IB_CM_MRA_REQ_SENT:
1269 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1270 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1271 cm_id_priv->private_data,
1272 cm_id_priv->private_data_len);
1273 break;
1274 case IB_CM_TIMEWAIT:
1275 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1276 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1277 break;
1278 default:
1279 goto unlock;
1280 }
1281 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1282
34816ad9 1283 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1284 if (ret)
1285 goto free;
1286 return;
1287
1288unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1289free: cm_free_msg(msg);
1290}
1291
1292static struct cm_id_private * cm_match_req(struct cm_work *work,
1293 struct cm_id_private *cm_id_priv)
1294{
1295 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1296 struct cm_timewait_info *timewait_info;
1297 struct cm_req_msg *req_msg;
1298 unsigned long flags;
1299
1300 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1301
1302 /* Check for duplicate REQ and stale connections. */
1303 spin_lock_irqsave(&cm.lock, flags);
1304 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1305 if (!timewait_info)
1306 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1307
1308 if (timewait_info) {
1309 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1310 timewait_info->work.remote_id);
8575329d 1311 cm_cleanup_timewait(cm_id_priv->timewait_info);
a977049d
HR		 1312 spin_unlock_irqrestore(&cm.lock, flags);
1313 if (cur_cm_id_priv) {
1314 cm_dup_req_handler(work, cur_cm_id_priv);
1315 cm_deref_id(cur_cm_id_priv);
1316 } else
1317 cm_issue_rej(work->port, work->mad_recv_wc,
1318 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1319 NULL, 0);
8575329d
SH		 1320 listen_cm_id_priv = NULL;
1321 goto out;
a977049d
HR		 1322 }
1323
1324 /* Find matching listen request. */
07d357d0 1325 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
6e61d04f
SH		 1326 req_msg->service_id,
1327 req_msg->private_data);
a977049d 1328 if (!listen_cm_id_priv) {
8575329d 1329 cm_cleanup_timewait(cm_id_priv->timewait_info);
a977049d
HR		 1330 spin_unlock_irqrestore(&cm.lock, flags);
1331 cm_issue_rej(work->port, work->mad_recv_wc,
1332 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1333 NULL, 0);
8575329d 1334 goto out;
a977049d
HR		 1335 }
1336 atomic_inc(&listen_cm_id_priv->refcount);
1337 atomic_inc(&cm_id_priv->refcount);
1338 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1339 atomic_inc(&cm_id_priv->work_count);
1340 spin_unlock_irqrestore(&cm.lock, flags);
8575329d 1341out:
a977049d 1342 return listen_cm_id_priv;
a977049d
HR		 1343}
1344
1345static int cm_req_handler(struct cm_work *work)
1346{
1347 struct ib_cm_id *cm_id;
1348 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1349 struct cm_req_msg *req_msg;
1350 int ret;
1351
1352 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1353
07d357d0 1354 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 1355 if (IS_ERR(cm_id))
1356 return PTR_ERR(cm_id);
1357
1358 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1359 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1360 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 1361 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 1362 &cm_id_priv->av);
1363 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1364 id.local_id);
1365 if (IS_ERR(cm_id_priv->timewait_info)) {
1366 ret = PTR_ERR(cm_id_priv->timewait_info);
76842405 1367 goto destroy;
a977049d
HR		 1368 }
1369 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1370 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1371 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1372
1373 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1374 if (!listen_cm_id_priv) {
1375 ret = -EINVAL;
76842405
SH		 1376 kfree(cm_id_priv->timewait_info);
1377 goto destroy;
a977049d
HR		 1378 }
1379
1380 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1381 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1382 cm_id_priv->id.service_id = req_msg->service_id;
97f52eb4 1383 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1384
1385 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1386 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
76842405
SH		 1387 if (ret) {
1388 ib_get_cached_gid(work->port->cm_dev->device,
1389 work->port->port_num, 0, &work->path[0].sgid);
1390 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1391 &work->path[0].sgid, sizeof work->path[0].sgid,
1392 NULL, 0);
1393 goto rejected;
1394 }
a977049d
HR		 1395 if (req_msg->alt_local_lid) {
1396 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
76842405
SH		 1397 if (ret) {
1398 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1399 &work->path[0].sgid,
1400 sizeof work->path[0].sgid, NULL, 0);
1401 goto rejected;
1402 }
a977049d
HR		 1403 }
1404 cm_id_priv->tid = req_msg->hdr.tid;
1405 cm_id_priv->timeout_ms = cm_convert_to_ms(
1406 cm_req_get_local_resp_timeout(req_msg));
1407 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1408 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1409 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1410 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1411 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1412 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1413 cm_id_priv->local_ack_timeout =
1414 cm_req_get_primary_local_ack_timeout(req_msg);
1415 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1416 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
ae7971a7 1417 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
a977049d
HR		 1418
1419 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1420 cm_process_work(cm_id_priv, work);
1421 cm_deref_id(listen_cm_id_priv);
1422 return 0;
1423
76842405
SH		 1424rejected:
1425 atomic_dec(&cm_id_priv->refcount);
a977049d 1426 cm_deref_id(listen_cm_id_priv);
76842405
SH		 1427destroy:
1428 ib_destroy_cm_id(cm_id);
a977049d
HR		 1429 return ret;
1430}
1431
1432static void cm_format_rep(struct cm_rep_msg *rep_msg,
1433 struct cm_id_private *cm_id_priv,
1434 struct ib_cm_rep_param *param)
1435{
1436 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1437 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1438 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1439 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1440 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1441 rep_msg->resp_resources = param->responder_resources;
1442 rep_msg->initiator_depth = param->initiator_depth;
1443 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1444 cm_rep_set_failover(rep_msg, param->failover_accepted);
1445 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1446 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1447 cm_rep_set_srq(rep_msg, param->srq);
1448 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1449
1450 if (param->private_data && param->private_data_len)
1451 memcpy(rep_msg->private_data, param->private_data,
1452 param->private_data_len);
1453}
1454
1455int ib_send_cm_rep(struct ib_cm_id *cm_id,
1456 struct ib_cm_rep_param *param)
1457{
1458 struct cm_id_private *cm_id_priv;
1459 struct ib_mad_send_buf *msg;
1460 struct cm_rep_msg *rep_msg;
a977049d
HR		 1461 unsigned long flags;
1462 int ret;
1463
1464 if (param->private_data &&
1465 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1466 return -EINVAL;
1467
1468 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1469 spin_lock_irqsave(&cm_id_priv->lock, flags);
1470 if (cm_id->state != IB_CM_REQ_RCVD &&
1471 cm_id->state != IB_CM_MRA_REQ_SENT) {
1472 ret = -EINVAL;
1473 goto out;
1474 }
1475
1476 ret = cm_alloc_msg(cm_id_priv, &msg);
1477 if (ret)
1478 goto out;
1479
1480 rep_msg = (struct cm_rep_msg *) msg->mad;
1481 cm_format_rep(rep_msg, cm_id_priv, param);
34816ad9 1482 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1483 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1484
34816ad9 1485 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1486 if (ret) {
1487 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1488 cm_free_msg(msg);
1489 return ret;
1490 }
1491
1492 cm_id->state = IB_CM_REP_SENT;
1493 cm_id_priv->msg = msg;
1494 cm_id_priv->initiator_depth = param->initiator_depth;
1495 cm_id_priv->responder_resources = param->responder_resources;
1496 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1497 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1498
1499out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1500 return ret;
1501}
1502EXPORT_SYMBOL(ib_send_cm_rep);
1503
1504static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1505 struct cm_id_private *cm_id_priv,
1506 const void *private_data,
1507 u8 private_data_len)
1508{
1509 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1510 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1511 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1512
1513 if (private_data && private_data_len)
1514 memcpy(rtu_msg->private_data, private_data, private_data_len);
1515}
1516
1517int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1518 const void *private_data,
1519 u8 private_data_len)
1520{
1521 struct cm_id_private *cm_id_priv;
1522 struct ib_mad_send_buf *msg;
a977049d
HR		 1523 unsigned long flags;
1524 void *data;
1525 int ret;
1526
1527 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1528 return -EINVAL;
1529
1530 data = cm_copy_private_data(private_data, private_data_len);
1531 if (IS_ERR(data))
1532 return PTR_ERR(data);
1533
1534 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1535 spin_lock_irqsave(&cm_id_priv->lock, flags);
1536 if (cm_id->state != IB_CM_REP_RCVD &&
1537 cm_id->state != IB_CM_MRA_REP_SENT) {
1538 ret = -EINVAL;
1539 goto error;
1540 }
1541
1542 ret = cm_alloc_msg(cm_id_priv, &msg);
1543 if (ret)
1544 goto error;
1545
1546 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1547 private_data, private_data_len);
1548
34816ad9 1549 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1550 if (ret) {
1551 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1552 cm_free_msg(msg);
1553 kfree(data);
1554 return ret;
1555 }
1556
1557 cm_id->state = IB_CM_ESTABLISHED;
1558 cm_set_private_data(cm_id_priv, data, private_data_len);
1559 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1560 return 0;
1561
1562error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1563 kfree(data);
1564 return ret;
1565}
1566EXPORT_SYMBOL(ib_send_cm_rtu);
1567
1568static void cm_format_rep_event(struct cm_work *work)
1569{
1570 struct cm_rep_msg *rep_msg;
1571 struct ib_cm_rep_event_param *param;
1572
1573 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1574 param = &work->cm_event.param.rep_rcvd;
1575 param->remote_ca_guid = rep_msg->local_ca_guid;
1576 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1577 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1578 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1579 param->responder_resources = rep_msg->initiator_depth;
1580 param->initiator_depth = rep_msg->resp_resources;
1581 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1582 param->failover_accepted = cm_rep_get_failover(rep_msg);
1583 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1584 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1585 param->srq = cm_rep_get_srq(rep_msg);
1586 work->cm_event.private_data = &rep_msg->private_data;
1587}
1588
1589static void cm_dup_rep_handler(struct cm_work *work)
1590{
1591 struct cm_id_private *cm_id_priv;
1592 struct cm_rep_msg *rep_msg;
1593 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1594 unsigned long flags;
1595 int ret;
1596
1597 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1598 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1599 rep_msg->local_comm_id);
1600 if (!cm_id_priv)
1601 return;
1602
1603 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1604 if (ret)
1605 goto deref;
1606
1607 spin_lock_irqsave(&cm_id_priv->lock, flags);
1608 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1609 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1610 cm_id_priv->private_data,
1611 cm_id_priv->private_data_len);
1612 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1613 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1614 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1615 cm_id_priv->private_data,
1616 cm_id_priv->private_data_len);
1617 else
1618 goto unlock;
1619 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1620
34816ad9 1621 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1622 if (ret)
1623 goto free;
1624 goto deref;
1625
1626unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1627free: cm_free_msg(msg);
1628deref: cm_deref_id(cm_id_priv);
1629}
1630
1631static int cm_rep_handler(struct cm_work *work)
1632{
1633 struct cm_id_private *cm_id_priv;
1634 struct cm_rep_msg *rep_msg;
1635 unsigned long flags;
1636 int ret;
1637
1638 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1639 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1640 if (!cm_id_priv) {
1641 cm_dup_rep_handler(work);
1642 return -EINVAL;
1643 }
1644
87fd1a11
SH		 1645 cm_format_rep_event(work);
1646
1647 spin_lock_irqsave(&cm_id_priv->lock, flags);
1648 switch (cm_id_priv->id.state) {
1649 case IB_CM_REQ_SENT:
1650 case IB_CM_MRA_REQ_RCVD:
1651 break;
1652 default:
1653 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1654 ret = -EINVAL;
1655 goto error;
1656 }
1657
a977049d
HR		 1658 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1659 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1660 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1661
87fd1a11 1662 spin_lock(&cm.lock);
a977049d
HR		 1663 /* Check for duplicate REP. */
1664 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1665 spin_unlock(&cm.lock);
1666 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1667 ret = -EINVAL;
1668 goto error;
1669 }
1670 /* Check for a stale connection. */
1671 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1672 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1673 &cm.remote_id_table);
1674 cm_id_priv->timewait_info->inserted_remote_id = 0;
1675 spin_unlock(&cm.lock);
1676 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1677 cm_issue_rej(work->port, work->mad_recv_wc,
1678 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1679 NULL, 0);
1680 ret = -EINVAL;
1681 goto error;
1682 }
87fd1a11 1683 spin_unlock(&cm.lock);
a977049d 1684
a977049d
HR		 1685 cm_id_priv->id.state = IB_CM_REP_RCVD;
1686 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1687 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1688 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1689 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1690 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1691 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1692
1693 /* todo: handle peer_to_peer */
1694
34816ad9 1695 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1696 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1697 if (!ret)
1698 list_add_tail(&work->list, &cm_id_priv->work_list);
1699 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1700
1701 if (ret)
1702 cm_process_work(cm_id_priv, work);
1703 else
1704 cm_deref_id(cm_id_priv);
1705 return 0;
1706
87fd1a11 1707error:
a977049d
HR		 1708 cm_deref_id(cm_id_priv);
1709 return ret;
1710}
1711
1712static int cm_establish_handler(struct cm_work *work)
1713{
1714 struct cm_id_private *cm_id_priv;
1715 unsigned long flags;
1716 int ret;
1717
1718 /* See comment in ib_cm_establish about lookup. */
1719 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1720 if (!cm_id_priv)
1721 return -EINVAL;
1722
1723 spin_lock_irqsave(&cm_id_priv->lock, flags);
1724 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1725 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1726 goto out;
1727 }
1728
34816ad9 1729 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1730 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1731 if (!ret)
1732 list_add_tail(&work->list, &cm_id_priv->work_list);
1733 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1734
1735 if (ret)
1736 cm_process_work(cm_id_priv, work);
1737 else
1738 cm_deref_id(cm_id_priv);
1739 return 0;
1740out:
1741 cm_deref_id(cm_id_priv);
1742 return -EINVAL;
1743}
1744
1745static int cm_rtu_handler(struct cm_work *work)
1746{
1747 struct cm_id_private *cm_id_priv;
1748 struct cm_rtu_msg *rtu_msg;
1749 unsigned long flags;
1750 int ret;
1751
1752 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1753 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1754 rtu_msg->local_comm_id);
1755 if (!cm_id_priv)
1756 return -EINVAL;
1757
1758 work->cm_event.private_data = &rtu_msg->private_data;
1759
1760 spin_lock_irqsave(&cm_id_priv->lock, flags);
1761 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1762 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1763 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1764 goto out;
1765 }
1766 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1767
34816ad9 1768 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1769 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1770 if (!ret)
1771 list_add_tail(&work->list, &cm_id_priv->work_list);
1772 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1773
1774 if (ret)
1775 cm_process_work(cm_id_priv, work);
1776 else
1777 cm_deref_id(cm_id_priv);
1778 return 0;
1779out:
1780 cm_deref_id(cm_id_priv);
1781 return -EINVAL;
1782}
1783
1784static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1785 struct cm_id_private *cm_id_priv,
1786 const void *private_data,
1787 u8 private_data_len)
1788{
1789 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1790 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1791 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1792 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1793 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1794
1795 if (private_data && private_data_len)
1796 memcpy(dreq_msg->private_data, private_data, private_data_len);
1797}
1798
1799int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1800 const void *private_data,
1801 u8 private_data_len)
1802{
1803 struct cm_id_private *cm_id_priv;
1804 struct ib_mad_send_buf *msg;
a977049d
HR		 1805 unsigned long flags;
1806 int ret;
1807
1808 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1809 return -EINVAL;
1810
1811 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1812 spin_lock_irqsave(&cm_id_priv->lock, flags);
1813 if (cm_id->state != IB_CM_ESTABLISHED) {
1814 ret = -EINVAL;
1815 goto out;
1816 }
1817
1818 ret = cm_alloc_msg(cm_id_priv, &msg);
1819 if (ret) {
1820 cm_enter_timewait(cm_id_priv);
1821 goto out;
1822 }
1823
1824 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1825 private_data, private_data_len);
34816ad9 1826 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1827 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1828
34816ad9 1829 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1830 if (ret) {
1831 cm_enter_timewait(cm_id_priv);
1832 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1833 cm_free_msg(msg);
1834 return ret;
1835 }
1836
1837 cm_id->state = IB_CM_DREQ_SENT;
1838 cm_id_priv->msg = msg;
1839out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1840 return ret;
1841}
1842EXPORT_SYMBOL(ib_send_cm_dreq);
1843
1844static void cm_format_drep(struct cm_drep_msg *drep_msg,
1845 struct cm_id_private *cm_id_priv,
1846 const void *private_data,
1847 u8 private_data_len)
1848{
1849 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1850 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1851 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1852
1853 if (private_data && private_data_len)
1854 memcpy(drep_msg->private_data, private_data, private_data_len);
1855}
1856
1857int ib_send_cm_drep(struct ib_cm_id *cm_id,
1858 const void *private_data,
1859 u8 private_data_len)
1860{
1861 struct cm_id_private *cm_id_priv;
1862 struct ib_mad_send_buf *msg;
a977049d
HR		 1863 unsigned long flags;
1864 void *data;
1865 int ret;
1866
1867 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1868 return -EINVAL;
1869
1870 data = cm_copy_private_data(private_data, private_data_len);
1871 if (IS_ERR(data))
1872 return PTR_ERR(data);
1873
1874 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1875 spin_lock_irqsave(&cm_id_priv->lock, flags);
1876 if (cm_id->state != IB_CM_DREQ_RCVD) {
1877 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1878 kfree(data);
1879 return -EINVAL;
1880 }
1881
1882 cm_set_private_data(cm_id_priv, data, private_data_len);
1883 cm_enter_timewait(cm_id_priv);
1884
1885 ret = cm_alloc_msg(cm_id_priv, &msg);
1886 if (ret)
1887 goto out;
1888
1889 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1890 private_data, private_data_len);
1891
34816ad9 1892 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1893 if (ret) {
1894 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1895 cm_free_msg(msg);
1896 return ret;
1897 }
1898
1899out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1900 return ret;
1901}
1902EXPORT_SYMBOL(ib_send_cm_drep);
1903
82a9c16a
SH		 1904static int cm_issue_drep(struct cm_port *port,
1905 struct ib_mad_recv_wc *mad_recv_wc)
1906{
1907 struct ib_mad_send_buf *msg = NULL;
1908 struct cm_dreq_msg *dreq_msg;
1909 struct cm_drep_msg *drep_msg;
1910 int ret;
1911
1912 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1913 if (ret)
1914 return ret;
1915
1916 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
1917 drep_msg = (struct cm_drep_msg *) msg->mad;
1918
1919 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
1920 drep_msg->remote_comm_id = dreq_msg->local_comm_id;
1921 drep_msg->local_comm_id = dreq_msg->remote_comm_id;
1922
1923 ret = ib_post_send_mad(msg, NULL);
1924 if (ret)
1925 cm_free_msg(msg);
1926
1927 return ret;
1928}
1929
a977049d
HR		 1930static int cm_dreq_handler(struct cm_work *work)
1931{
1932 struct cm_id_private *cm_id_priv;
1933 struct cm_dreq_msg *dreq_msg;
1934 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1935 unsigned long flags;
1936 int ret;
1937
1938 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1939 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1940 dreq_msg->local_comm_id);
82a9c16a
SH		 1941 if (!cm_id_priv) {
1942 cm_issue_drep(work->port, work->mad_recv_wc);
a977049d 1943 return -EINVAL;
82a9c16a 1944 }
a977049d
HR		 1945
1946 work->cm_event.private_data = &dreq_msg->private_data;
1947
1948 spin_lock_irqsave(&cm_id_priv->lock, flags);
1949 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1950 goto unlock;
1951
1952 switch (cm_id_priv->id.state) {
1953 case IB_CM_REP_SENT:
1954 case IB_CM_DREQ_SENT:
34816ad9 1955 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1956 break;
1957 case IB_CM_ESTABLISHED:
1958 case IB_CM_MRA_REP_RCVD:
1959 break;
1960 case IB_CM_TIMEWAIT:
1961 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1962 goto unlock;
1963
1964 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1965 cm_id_priv->private_data,
1966 cm_id_priv->private_data_len);
1967 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1968
34816ad9 1969 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 1970 cm_free_msg(msg);
1971 goto deref;
1972 default:
1973 goto unlock;
1974 }
1975 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1976 cm_id_priv->tid = dreq_msg->hdr.tid;
1977 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1978 if (!ret)
1979 list_add_tail(&work->list, &cm_id_priv->work_list);
1980 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1981
1982 if (ret)
1983 cm_process_work(cm_id_priv, work);
1984 else
1985 cm_deref_id(cm_id_priv);
1986 return 0;
1987
1988unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1989deref: cm_deref_id(cm_id_priv);
1990 return -EINVAL;
1991}
1992
1993static int cm_drep_handler(struct cm_work *work)
1994{
1995 struct cm_id_private *cm_id_priv;
1996 struct cm_drep_msg *drep_msg;
1997 unsigned long flags;
1998 int ret;
1999
2000 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
2001 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
2002 drep_msg->local_comm_id);
2003 if (!cm_id_priv)
2004 return -EINVAL;
2005
2006 work->cm_event.private_data = &drep_msg->private_data;
2007
2008 spin_lock_irqsave(&cm_id_priv->lock, flags);
2009 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2010 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
2011 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2012 goto out;
2013 }
2014 cm_enter_timewait(cm_id_priv);
2015
34816ad9 2016 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2017 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2018 if (!ret)
2019 list_add_tail(&work->list, &cm_id_priv->work_list);
2020 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2021
2022 if (ret)
2023 cm_process_work(cm_id_priv, work);
2024 else
2025 cm_deref_id(cm_id_priv);
2026 return 0;
2027out:
2028 cm_deref_id(cm_id_priv);
2029 return -EINVAL;
2030}
2031
2032int ib_send_cm_rej(struct ib_cm_id *cm_id,
2033 enum ib_cm_rej_reason reason,
2034 void *ari,
2035 u8 ari_length,
2036 const void *private_data,
2037 u8 private_data_len)
2038{
2039 struct cm_id_private *cm_id_priv;
2040 struct ib_mad_send_buf *msg;
a977049d
HR		 2041 unsigned long flags;
2042 int ret;
2043
2044 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2045 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2046 return -EINVAL;
2047
2048 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2049
2050 spin_lock_irqsave(&cm_id_priv->lock, flags);
2051 switch (cm_id->state) {
2052 case IB_CM_REQ_SENT:
2053 case IB_CM_MRA_REQ_RCVD:
2054 case IB_CM_REQ_RCVD:
2055 case IB_CM_MRA_REQ_SENT:
2056 case IB_CM_REP_RCVD:
2057 case IB_CM_MRA_REP_SENT:
2058 ret = cm_alloc_msg(cm_id_priv, &msg);
2059 if (!ret)
2060 cm_format_rej((struct cm_rej_msg *) msg->mad,
2061 cm_id_priv, reason, ari, ari_length,
2062 private_data, private_data_len);
2063
2064 cm_reset_to_idle(cm_id_priv);
2065 break;
2066 case IB_CM_REP_SENT:
2067 case IB_CM_MRA_REP_RCVD:
2068 ret = cm_alloc_msg(cm_id_priv, &msg);
2069 if (!ret)
2070 cm_format_rej((struct cm_rej_msg *) msg->mad,
2071 cm_id_priv, reason, ari, ari_length,
2072 private_data, private_data_len);
2073
2074 cm_enter_timewait(cm_id_priv);
2075 break;
2076 default:
2077 ret = -EINVAL;
2078 goto out;
2079 }
2080
2081 if (ret)
2082 goto out;
2083
34816ad9 2084 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2085 if (ret)
2086 cm_free_msg(msg);
2087
2088out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2089 return ret;
2090}
2091EXPORT_SYMBOL(ib_send_cm_rej);
2092
2093static void cm_format_rej_event(struct cm_work *work)
2094{
2095 struct cm_rej_msg *rej_msg;
2096 struct ib_cm_rej_event_param *param;
2097
2098 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2099 param = &work->cm_event.param.rej_rcvd;
2100 param->ari = rej_msg->ari;
2101 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 2102 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 2103 work->cm_event.private_data = &rej_msg->private_data;
2104}
2105
2106static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2107{
2108 struct cm_timewait_info *timewait_info;
2109 struct cm_id_private *cm_id_priv;
2110 unsigned long flags;
97f52eb4 2111 __be32 remote_id;
a977049d
HR		 2112
2113 remote_id = rej_msg->local_comm_id;
2114
97f52eb4 2115 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
a977049d 2116 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 2117 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 2118 remote_id);
2119 if (!timewait_info) {
2120 spin_unlock_irqrestore(&cm.lock, flags);
2121 return NULL;
2122 }
f06d2653
SH		 2123 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2124 (timewait_info->work.local_id ^
2125 cm.random_id_operand));
a977049d
HR		 2126 if (cm_id_priv) {
2127 if (cm_id_priv->id.remote_id == remote_id)
2128 atomic_inc(&cm_id_priv->refcount);
2129 else
2130 cm_id_priv = NULL;
2131 }
2132 spin_unlock_irqrestore(&cm.lock, flags);
2133 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2134 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2135 else
2136 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2137
2138 return cm_id_priv;
2139}
2140
2141static int cm_rej_handler(struct cm_work *work)
2142{
2143 struct cm_id_private *cm_id_priv;
2144 struct cm_rej_msg *rej_msg;
2145 unsigned long flags;
2146 int ret;
2147
2148 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2149 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2150 if (!cm_id_priv)
2151 return -EINVAL;
2152
2153 cm_format_rej_event(work);
2154
2155 spin_lock_irqsave(&cm_id_priv->lock, flags);
2156 switch (cm_id_priv->id.state) {
2157 case IB_CM_REQ_SENT:
2158 case IB_CM_MRA_REQ_RCVD:
2159 case IB_CM_REP_SENT:
2160 case IB_CM_MRA_REP_RCVD:
34816ad9 2161 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2162 /* fall through */
2163 case IB_CM_REQ_RCVD:
2164 case IB_CM_MRA_REQ_SENT:
97f52eb4 2165 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2166 cm_enter_timewait(cm_id_priv);
2167 else
2168 cm_reset_to_idle(cm_id_priv);
2169 break;
2170 case IB_CM_DREQ_SENT:
34816ad9 2171 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2172 /* fall through */
2173 case IB_CM_REP_RCVD:
2174 case IB_CM_MRA_REP_SENT:
2175 case IB_CM_ESTABLISHED:
2176 cm_enter_timewait(cm_id_priv);
2177 break;
2178 default:
2179 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2180 ret = -EINVAL;
2181 goto out;
2182 }
2183
2184 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2185 if (!ret)
2186 list_add_tail(&work->list, &cm_id_priv->work_list);
2187 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2188
2189 if (ret)
2190 cm_process_work(cm_id_priv, work);
2191 else
2192 cm_deref_id(cm_id_priv);
2193 return 0;
2194out:
2195 cm_deref_id(cm_id_priv);
2196 return -EINVAL;
2197}
2198
2199int ib_send_cm_mra(struct ib_cm_id *cm_id,
2200 u8 service_timeout,
2201 const void *private_data,
2202 u8 private_data_len)
2203{
2204 struct cm_id_private *cm_id_priv;
2205 struct ib_mad_send_buf *msg;
a977049d
HR		 2206 void *data;
2207 unsigned long flags;
2208 int ret;
2209
2210 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2211 return -EINVAL;
2212
2213 data = cm_copy_private_data(private_data, private_data_len);
2214 if (IS_ERR(data))
2215 return PTR_ERR(data);
2216
2217 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2218
2219 spin_lock_irqsave(&cm_id_priv->lock, flags);
2220 switch(cm_id_priv->id.state) {
2221 case IB_CM_REQ_RCVD:
2222 ret = cm_alloc_msg(cm_id_priv, &msg);
2223 if (ret)
2224 goto error1;
2225
2226 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2227 CM_MSG_RESPONSE_REQ, service_timeout,
2228 private_data, private_data_len);
34816ad9 2229 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2230 if (ret)
2231 goto error2;
2232 cm_id->state = IB_CM_MRA_REQ_SENT;
2233 break;
2234 case IB_CM_REP_RCVD:
2235 ret = cm_alloc_msg(cm_id_priv, &msg);
2236 if (ret)
2237 goto error1;
2238
2239 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2240 CM_MSG_RESPONSE_REP, service_timeout,
2241 private_data, private_data_len);
34816ad9 2242 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2243 if (ret)
2244 goto error2;
2245 cm_id->state = IB_CM_MRA_REP_SENT;
2246 break;
2247 case IB_CM_ESTABLISHED:
2248 ret = cm_alloc_msg(cm_id_priv, &msg);
2249 if (ret)
2250 goto error1;
2251
2252 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2253 CM_MSG_RESPONSE_OTHER, service_timeout,
2254 private_data, private_data_len);
34816ad9 2255 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2256 if (ret)
2257 goto error2;
2258 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2259 break;
2260 default:
2261 ret = -EINVAL;
2262 goto error1;
2263 }
2264 cm_id_priv->service_timeout = service_timeout;
2265 cm_set_private_data(cm_id_priv, data, private_data_len);
2266 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2267 return 0;
2268
2269error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2270 kfree(data);
2271 return ret;
2272
2273error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2274 kfree(data);
2275 cm_free_msg(msg);
2276 return ret;
2277}
2278EXPORT_SYMBOL(ib_send_cm_mra);
2279
2280static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2281{
2282 switch (cm_mra_get_msg_mraed(mra_msg)) {
2283 case CM_MSG_RESPONSE_REQ:
2284 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2285 case CM_MSG_RESPONSE_REP:
2286 case CM_MSG_RESPONSE_OTHER:
2287 return cm_acquire_id(mra_msg->remote_comm_id,
2288 mra_msg->local_comm_id);
2289 default:
2290 return NULL;
2291 }
2292}
2293
2294static int cm_mra_handler(struct cm_work *work)
2295{
2296 struct cm_id_private *cm_id_priv;
2297 struct cm_mra_msg *mra_msg;
2298 unsigned long flags;
2299 int timeout, ret;
2300
2301 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2302 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2303 if (!cm_id_priv)
2304 return -EINVAL;
2305
2306 work->cm_event.private_data = &mra_msg->private_data;
2307 work->cm_event.param.mra_rcvd.service_timeout =
2308 cm_mra_get_service_timeout(mra_msg);
2309 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2310 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2311
2312 spin_lock_irqsave(&cm_id_priv->lock, flags);
2313 switch (cm_id_priv->id.state) {
2314 case IB_CM_REQ_SENT:
2315 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2316 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2317 cm_id_priv->msg, timeout))
a977049d
HR		 2318 goto out;
2319 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2320 break;
2321 case IB_CM_REP_SENT:
2322 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2323 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2324 cm_id_priv->msg, timeout))
a977049d
HR		 2325 goto out;
2326 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2327 break;
2328 case IB_CM_ESTABLISHED:
2329 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2330 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2331 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2332 cm_id_priv->msg, timeout))
a977049d
HR		 2333 goto out;
2334 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2335 break;
2336 default:
2337 goto out;
2338 }
2339
2340 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2341 cm_id_priv->id.state;
2342 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2343 if (!ret)
2344 list_add_tail(&work->list, &cm_id_priv->work_list);
2345 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2346
2347 if (ret)
2348 cm_process_work(cm_id_priv, work);
2349 else
2350 cm_deref_id(cm_id_priv);
2351 return 0;
2352out:
2353 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2354 cm_deref_id(cm_id_priv);
2355 return -EINVAL;
2356}
2357
2358static void cm_format_lap(struct cm_lap_msg *lap_msg,
2359 struct cm_id_private *cm_id_priv,
2360 struct ib_sa_path_rec *alternate_path,
2361 const void *private_data,
2362 u8 private_data_len)
2363{
2364 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2365 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2366 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2367 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2368 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2369 /* todo: need remote CM response timeout */
2370 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2371 lap_msg->alt_local_lid = alternate_path->slid;
2372 lap_msg->alt_remote_lid = alternate_path->dlid;
2373 lap_msg->alt_local_gid = alternate_path->sgid;
2374 lap_msg->alt_remote_gid = alternate_path->dgid;
2375 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2376 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2377 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2378 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2379 cm_lap_set_sl(lap_msg, alternate_path->sl);
2380 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2381 cm_lap_set_local_ack_timeout(lap_msg,
2382 min(31, alternate_path->packet_life_time + 1));
2383
2384 if (private_data && private_data_len)
2385 memcpy(lap_msg->private_data, private_data, private_data_len);
2386}
2387
2388int ib_send_cm_lap(struct ib_cm_id *cm_id,
2389 struct ib_sa_path_rec *alternate_path,
2390 const void *private_data,
2391 u8 private_data_len)
2392{
2393 struct cm_id_private *cm_id_priv;
2394 struct ib_mad_send_buf *msg;
a977049d
HR		 2395 unsigned long flags;
2396 int ret;
2397
2398 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2399 return -EINVAL;
2400
2401 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2402 spin_lock_irqsave(&cm_id_priv->lock, flags);
2403 if (cm_id->state != IB_CM_ESTABLISHED ||
2404 cm_id->lap_state != IB_CM_LAP_IDLE) {
2405 ret = -EINVAL;
2406 goto out;
2407 }
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);
34816ad9 2415 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2416 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2417
34816ad9 2418 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 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
2428out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2429 return ret;
2430}
2431EXPORT_SYMBOL(ib_send_cm_lap);
2432
2433static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2434 struct cm_lap_msg *lap_msg)
2435{
2436 memset(path, 0, sizeof *path);
2437 path->dgid = lap_msg->alt_local_gid;
2438 path->sgid = lap_msg->alt_remote_gid;
2439 path->dlid = lap_msg->alt_local_lid;
2440 path->slid = lap_msg->alt_remote_lid;
2441 path->flow_label = cm_lap_get_flow_label(lap_msg);
2442 path->hop_limit = lap_msg->alt_hop_limit;
2443 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2444 path->reversible = 1;
2445 /* pkey is same as in REQ */
2446 path->sl = cm_lap_get_sl(lap_msg);
2447 path->mtu_selector = IB_SA_EQ;
2448 /* mtu is same as in REQ */
2449 path->rate_selector = IB_SA_EQ;
2450 path->rate = cm_lap_get_packet_rate(lap_msg);
2451 path->packet_life_time_selector = IB_SA_EQ;
2452 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2453 path->packet_life_time -= (path->packet_life_time > 0);
2454}
2455
2456static int cm_lap_handler(struct cm_work *work)
2457{
2458 struct cm_id_private *cm_id_priv;
2459 struct cm_lap_msg *lap_msg;
2460 struct ib_cm_lap_event_param *param;
2461 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2462 unsigned long flags;
2463 int ret;
2464
2465 /* todo: verify LAP request and send reject APR if invalid. */
2466 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2467 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2468 lap_msg->local_comm_id);
2469 if (!cm_id_priv)
2470 return -EINVAL;
2471
2472 param = &work->cm_event.param.lap_rcvd;
2473 param->alternate_path = &work->path[0];
2474 cm_format_path_from_lap(param->alternate_path, lap_msg);
2475 work->cm_event.private_data = &lap_msg->private_data;
2476
2477 spin_lock_irqsave(&cm_id_priv->lock, flags);
2478 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2479 goto unlock;
2480
2481 switch (cm_id_priv->id.lap_state) {
2482 case IB_CM_LAP_IDLE:
2483 break;
2484 case IB_CM_MRA_LAP_SENT:
2485 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2486 goto unlock;
2487
2488 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2489 CM_MSG_RESPONSE_OTHER,
2490 cm_id_priv->service_timeout,
2491 cm_id_priv->private_data,
2492 cm_id_priv->private_data_len);
2493 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2494
34816ad9 2495 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2496 cm_free_msg(msg);
2497 goto deref;
2498 default:
2499 goto unlock;
2500 }
2501
2502 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2503 cm_id_priv->tid = lap_msg->hdr.tid;
2504 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2505 if (!ret)
2506 list_add_tail(&work->list, &cm_id_priv->work_list);
2507 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2508
2509 if (ret)
2510 cm_process_work(cm_id_priv, work);
2511 else
2512 cm_deref_id(cm_id_priv);
2513 return 0;
2514
2515unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2516deref: cm_deref_id(cm_id_priv);
2517 return -EINVAL;
2518}
2519
2520static void cm_format_apr(struct cm_apr_msg *apr_msg,
2521 struct cm_id_private *cm_id_priv,
2522 enum ib_cm_apr_status status,
2523 void *info,
2524 u8 info_length,
2525 const void *private_data,
2526 u8 private_data_len)
2527{
2528 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2529 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2530 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2531 apr_msg->ap_status = (u8) status;
2532
2533 if (info && info_length) {
2534 apr_msg->info_length = info_length;
2535 memcpy(apr_msg->info, info, info_length);
2536 }
2537
2538 if (private_data && private_data_len)
2539 memcpy(apr_msg->private_data, private_data, private_data_len);
2540}
2541
2542int ib_send_cm_apr(struct ib_cm_id *cm_id,
2543 enum ib_cm_apr_status status,
2544 void *info,
2545 u8 info_length,
2546 const void *private_data,
2547 u8 private_data_len)
2548{
2549 struct cm_id_private *cm_id_priv;
2550 struct ib_mad_send_buf *msg;
a977049d
HR		 2551 unsigned long flags;
2552 int ret;
2553
2554 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2555 (info && info_length > IB_CM_APR_INFO_LENGTH))
2556 return -EINVAL;
2557
2558 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2559 spin_lock_irqsave(&cm_id_priv->lock, flags);
2560 if (cm_id->state != IB_CM_ESTABLISHED ||
2561 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2562 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2563 ret = -EINVAL;
2564 goto out;
2565 }
2566
2567 ret = cm_alloc_msg(cm_id_priv, &msg);
2568 if (ret)
2569 goto out;
2570
2571 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2572 info, info_length, private_data, private_data_len);
34816ad9 2573 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2574 if (ret) {
2575 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2576 cm_free_msg(msg);
2577 return ret;
2578 }
2579
2580 cm_id->lap_state = IB_CM_LAP_IDLE;
2581out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2582 return ret;
2583}
2584EXPORT_SYMBOL(ib_send_cm_apr);
2585
2586static int cm_apr_handler(struct cm_work *work)
2587{
2588 struct cm_id_private *cm_id_priv;
2589 struct cm_apr_msg *apr_msg;
2590 unsigned long flags;
2591 int ret;
2592
2593 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2594 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2595 apr_msg->local_comm_id);
2596 if (!cm_id_priv)
2597 return -EINVAL; /* Unmatched reply. */
2598
2599 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2600 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2601 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2602 work->cm_event.private_data = &apr_msg->private_data;
2603
2604 spin_lock_irqsave(&cm_id_priv->lock, flags);
2605 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2606 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2607 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2608 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2609 goto out;
2610 }
2611 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
34816ad9 2612 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2613 cm_id_priv->msg = NULL;
2614
2615 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2616 if (!ret)
2617 list_add_tail(&work->list, &cm_id_priv->work_list);
2618 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2619
2620 if (ret)
2621 cm_process_work(cm_id_priv, work);
2622 else
2623 cm_deref_id(cm_id_priv);
2624 return 0;
2625out:
2626 cm_deref_id(cm_id_priv);
2627 return -EINVAL;
2628}
2629
2630static int cm_timewait_handler(struct cm_work *work)
2631{
2632 struct cm_timewait_info *timewait_info;
2633 struct cm_id_private *cm_id_priv;
a977049d
HR		 2634 int ret;
2635
2636 timewait_info = (struct cm_timewait_info *)work;
8575329d
SH		 2637 spin_lock_irq(&cm.lock);
2638 list_del(&timewait_info->list);
2639 spin_unlock_irq(&cm.lock);
a977049d
HR		 2640
2641 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2642 timewait_info->work.remote_id);
2643 if (!cm_id_priv)
2644 return -EINVAL;
2645
8575329d 2646 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2647 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2648 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
8575329d 2649 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2650 goto out;
2651 }
2652 cm_id_priv->id.state = IB_CM_IDLE;
2653 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2654 if (!ret)
2655 list_add_tail(&work->list, &cm_id_priv->work_list);
8575329d 2656 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2657
2658 if (ret)
2659 cm_process_work(cm_id_priv, work);
2660 else
2661 cm_deref_id(cm_id_priv);
2662 return 0;
2663out:
2664 cm_deref_id(cm_id_priv);
2665 return -EINVAL;
2666}
2667
2668static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2669 struct cm_id_private *cm_id_priv,
2670 struct ib_cm_sidr_req_param *param)
2671{
2672 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2673 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2674 sidr_req_msg->request_id = cm_id_priv->id.local_id;
75af9088 2675 sidr_req_msg->pkey = cpu_to_be16(param->path->pkey);
a977049d
HR		 2676 sidr_req_msg->service_id = param->service_id;
2677
2678 if (param->private_data && param->private_data_len)
2679 memcpy(sidr_req_msg->private_data, param->private_data,
2680 param->private_data_len);
2681}
2682
2683int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2684 struct ib_cm_sidr_req_param *param)
2685{
2686 struct cm_id_private *cm_id_priv;
2687 struct ib_mad_send_buf *msg;
a977049d
HR		 2688 unsigned long flags;
2689 int ret;
2690
2691 if (!param->path || (param->private_data &&
2692 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2693 return -EINVAL;
2694
2695 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2696 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2697 if (ret)
2698 goto out;
2699
2700 cm_id->service_id = param->service_id;
97f52eb4 2701 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2702 cm_id_priv->timeout_ms = param->timeout_ms;
2703 cm_id_priv->max_cm_retries = param->max_cm_retries;
2704 ret = cm_alloc_msg(cm_id_priv, &msg);
2705 if (ret)
2706 goto out;
2707
2708 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2709 param);
34816ad9 2710 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2711 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2712
2713 spin_lock_irqsave(&cm_id_priv->lock, flags);
2714 if (cm_id->state == IB_CM_IDLE)
34816ad9 2715 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2716 else
2717 ret = -EINVAL;
2718
2719 if (ret) {
2720 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2721 cm_free_msg(msg);
2722 goto out;
2723 }
2724 cm_id->state = IB_CM_SIDR_REQ_SENT;
2725 cm_id_priv->msg = msg;
2726 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2727out:
2728 return ret;
2729}
2730EXPORT_SYMBOL(ib_send_cm_sidr_req);
2731
2732static void cm_format_sidr_req_event(struct cm_work *work,
2733 struct ib_cm_id *listen_id)
2734{
2735 struct cm_sidr_req_msg *sidr_req_msg;
2736 struct ib_cm_sidr_req_event_param *param;
2737
2738 sidr_req_msg = (struct cm_sidr_req_msg *)
2739 work->mad_recv_wc->recv_buf.mad;
2740 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 2741 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 2742 param->listen_id = listen_id;
a977049d
HR		 2743 param->port = work->port->port_num;
2744 work->cm_event.private_data = &sidr_req_msg->private_data;
2745}
2746
2747static int cm_sidr_req_handler(struct cm_work *work)
2748{
2749 struct ib_cm_id *cm_id;
2750 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2751 struct cm_sidr_req_msg *sidr_req_msg;
2752 struct ib_wc *wc;
2753 unsigned long flags;
2754
07d357d0 2755 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 2756 if (IS_ERR(cm_id))
2757 return PTR_ERR(cm_id);
2758 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2759
2760 /* Record SGID/SLID and request ID for lookup. */
2761 sidr_req_msg = (struct cm_sidr_req_msg *)
2762 work->mad_recv_wc->recv_buf.mad;
2763 wc = work->mad_recv_wc->wc;
97f52eb4 2764 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 2765 cm_id_priv->av.dgid.global.interface_id = 0;
2766 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 2767 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 2768 &cm_id_priv->av);
2769 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2770 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2771 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2772 atomic_inc(&cm_id_priv->work_count);
2773
2774 spin_lock_irqsave(&cm.lock, flags);
2775 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2776 if (cur_cm_id_priv) {
2777 spin_unlock_irqrestore(&cm.lock, flags);
2778 goto out; /* Duplicate message. */
2779 }
07d357d0 2780 cur_cm_id_priv = cm_find_listen(cm_id->device,
6e61d04f
SH		 2781 sidr_req_msg->service_id,
2782 sidr_req_msg->private_data);
a977049d
HR		 2783 if (!cur_cm_id_priv) {
2784 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2785 spin_unlock_irqrestore(&cm.lock, flags);
2786 /* todo: reply with no match */
2787 goto out; /* No match. */
2788 }
2789 atomic_inc(&cur_cm_id_priv->refcount);
2790 spin_unlock_irqrestore(&cm.lock, flags);
2791
2792 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2793 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2794 cm_id_priv->id.service_id = sidr_req_msg->service_id;
97f52eb4 2795 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2796
2797 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2798 cm_process_work(cm_id_priv, work);
2799 cm_deref_id(cur_cm_id_priv);
2800 return 0;
2801out:
2802 ib_destroy_cm_id(&cm_id_priv->id);
2803 return -EINVAL;
2804}
2805
2806static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2807 struct cm_id_private *cm_id_priv,
2808 struct ib_cm_sidr_rep_param *param)
2809{
2810 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2811 cm_id_priv->tid);
2812 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2813 sidr_rep_msg->status = param->status;
2814 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2815 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2816 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2817
2818 if (param->info && param->info_length)
2819 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2820
2821 if (param->private_data && param->private_data_len)
2822 memcpy(sidr_rep_msg->private_data, param->private_data,
2823 param->private_data_len);
2824}
2825
2826int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2827 struct ib_cm_sidr_rep_param *param)
2828{
2829 struct cm_id_private *cm_id_priv;
2830 struct ib_mad_send_buf *msg;
a977049d
HR		 2831 unsigned long flags;
2832 int ret;
2833
2834 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2835 (param->private_data &&
2836 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2837 return -EINVAL;
2838
2839 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2840 spin_lock_irqsave(&cm_id_priv->lock, flags);
2841 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2842 ret = -EINVAL;
2843 goto error;
2844 }
2845
2846 ret = cm_alloc_msg(cm_id_priv, &msg);
2847 if (ret)
2848 goto error;
2849
2850 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2851 param);
34816ad9 2852 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2853 if (ret) {
2854 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2855 cm_free_msg(msg);
2856 return ret;
2857 }
2858 cm_id->state = IB_CM_IDLE;
2859 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2860
2861 spin_lock_irqsave(&cm.lock, flags);
2862 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2863 spin_unlock_irqrestore(&cm.lock, flags);
2864 return 0;
2865
2866error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2867 return ret;
2868}
2869EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2870
2871static void cm_format_sidr_rep_event(struct cm_work *work)
2872{
2873 struct cm_sidr_rep_msg *sidr_rep_msg;
2874 struct ib_cm_sidr_rep_event_param *param;
2875
2876 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2877 work->mad_recv_wc->recv_buf.mad;
2878 param = &work->cm_event.param.sidr_rep_rcvd;
2879 param->status = sidr_rep_msg->status;
2880 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2881 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2882 param->info = &sidr_rep_msg->info;
2883 param->info_len = sidr_rep_msg->info_length;
2884 work->cm_event.private_data = &sidr_rep_msg->private_data;
2885}
2886
2887static int cm_sidr_rep_handler(struct cm_work *work)
2888{
2889 struct cm_sidr_rep_msg *sidr_rep_msg;
2890 struct cm_id_private *cm_id_priv;
2891 unsigned long flags;
2892
2893 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2894 work->mad_recv_wc->recv_buf.mad;
2895 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2896 if (!cm_id_priv)
2897 return -EINVAL; /* Unmatched reply. */
2898
2899 spin_lock_irqsave(&cm_id_priv->lock, flags);
2900 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2901 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2902 goto out;
2903 }
2904 cm_id_priv->id.state = IB_CM_IDLE;
34816ad9 2905 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2906 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2907
2908 cm_format_sidr_rep_event(work);
2909 cm_process_work(cm_id_priv, work);
2910 return 0;
2911out:
2912 cm_deref_id(cm_id_priv);
2913 return -EINVAL;
2914}
2915
2916static void cm_process_send_error(struct ib_mad_send_buf *msg,
2917 enum ib_wc_status wc_status)
2918{
2919 struct cm_id_private *cm_id_priv;
2920 struct ib_cm_event cm_event;
2921 enum ib_cm_state state;
2922 unsigned long flags;
2923 int ret;
2924
2925 memset(&cm_event, 0, sizeof cm_event);
2926 cm_id_priv = msg->context[0];
2927
2928 /* Discard old sends or ones without a response. */
2929 spin_lock_irqsave(&cm_id_priv->lock, flags);
2930 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2931 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2932 goto discard;
2933
2934 switch (state) {
2935 case IB_CM_REQ_SENT:
2936 case IB_CM_MRA_REQ_RCVD:
2937 cm_reset_to_idle(cm_id_priv);
2938 cm_event.event = IB_CM_REQ_ERROR;
2939 break;
2940 case IB_CM_REP_SENT:
2941 case IB_CM_MRA_REP_RCVD:
2942 cm_reset_to_idle(cm_id_priv);
2943 cm_event.event = IB_CM_REP_ERROR;
2944 break;
2945 case IB_CM_DREQ_SENT:
2946 cm_enter_timewait(cm_id_priv);
2947 cm_event.event = IB_CM_DREQ_ERROR;
2948 break;
2949 case IB_CM_SIDR_REQ_SENT:
2950 cm_id_priv->id.state = IB_CM_IDLE;
2951 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2952 break;
2953 default:
2954 goto discard;
2955 }
2956 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2957 cm_event.param.send_status = wc_status;
2958
2959 /* No other events can occur on the cm_id at this point. */
2960 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2961 cm_free_msg(msg);
2962 if (ret)
2963 ib_destroy_cm_id(&cm_id_priv->id);
2964 return;
2965discard:
2966 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2967 cm_free_msg(msg);
2968}
2969
2970static void cm_send_handler(struct ib_mad_agent *mad_agent,
2971 struct ib_mad_send_wc *mad_send_wc)
2972{
34816ad9 2973 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
a977049d
HR		 2974
2975 switch (mad_send_wc->status) {
2976 case IB_WC_SUCCESS:
2977 case IB_WC_WR_FLUSH_ERR:
2978 cm_free_msg(msg);
2979 break;
2980 default:
2981 if (msg->context[0] && msg->context[1])
2982 cm_process_send_error(msg, mad_send_wc->status);
2983 else
2984 cm_free_msg(msg);
2985 break;
2986 }
2987}
2988
2989static void cm_work_handler(void *data)
2990{
2991 struct cm_work *work = data;
2992 int ret;
2993
2994 switch (work->cm_event.event) {
2995 case IB_CM_REQ_RECEIVED:
2996 ret = cm_req_handler(work);
2997 break;
2998 case IB_CM_MRA_RECEIVED:
2999 ret = cm_mra_handler(work);
3000 break;
3001 case IB_CM_REJ_RECEIVED:
3002 ret = cm_rej_handler(work);
3003 break;
3004 case IB_CM_REP_RECEIVED:
3005 ret = cm_rep_handler(work);
3006 break;
3007 case IB_CM_RTU_RECEIVED:
3008 ret = cm_rtu_handler(work);
3009 break;
3010 case IB_CM_USER_ESTABLISHED:
3011 ret = cm_establish_handler(work);
3012 break;
3013 case IB_CM_DREQ_RECEIVED:
3014 ret = cm_dreq_handler(work);
3015 break;
3016 case IB_CM_DREP_RECEIVED:
3017 ret = cm_drep_handler(work);
3018 break;
3019 case IB_CM_SIDR_REQ_RECEIVED:
3020 ret = cm_sidr_req_handler(work);
3021 break;
3022 case IB_CM_SIDR_REP_RECEIVED:
3023 ret = cm_sidr_rep_handler(work);
3024 break;
3025 case IB_CM_LAP_RECEIVED:
3026 ret = cm_lap_handler(work);
3027 break;
3028 case IB_CM_APR_RECEIVED:
3029 ret = cm_apr_handler(work);
3030 break;
3031 case IB_CM_TIMEWAIT_EXIT:
3032 ret = cm_timewait_handler(work);
3033 break;
3034 default:
3035 ret = -EINVAL;
3036 break;
3037 }
3038 if (ret)
3039 cm_free_work(work);
3040}
3041
3042int ib_cm_establish(struct ib_cm_id *cm_id)
3043{
3044 struct cm_id_private *cm_id_priv;
3045 struct cm_work *work;
3046 unsigned long flags;
3047 int ret = 0;
3048
3049 work = kmalloc(sizeof *work, GFP_ATOMIC);
3050 if (!work)
3051 return -ENOMEM;
3052
3053 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3054 spin_lock_irqsave(&cm_id_priv->lock, flags);
3055 switch (cm_id->state)
3056 {
3057 case IB_CM_REP_SENT:
3058 case IB_CM_MRA_REP_RCVD:
3059 cm_id->state = IB_CM_ESTABLISHED;
3060 break;
3061 case IB_CM_ESTABLISHED:
3062 ret = -EISCONN;
3063 break;
3064 default:
3065 ret = -EINVAL;
3066 break;
3067 }
3068 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3069
3070 if (ret) {
3071 kfree(work);
3072 goto out;
3073 }
3074
3075 /*
3076 * The CM worker thread may try to destroy the cm_id before it
3077 * can execute this work item. To prevent potential deadlock,
3078 * we need to find the cm_id once we're in the context of the
3079 * worker thread, rather than holding a reference on it.
3080 */
3081 INIT_WORK(&work->work, cm_work_handler, work);
3082 work->local_id = cm_id->local_id;
3083 work->remote_id = cm_id->remote_id;
3084 work->mad_recv_wc = NULL;
3085 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3086 queue_work(cm.wq, &work->work);
3087out:
3088 return ret;
3089}
3090EXPORT_SYMBOL(ib_cm_establish);
3091
3092static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3093 struct ib_mad_recv_wc *mad_recv_wc)
3094{
3095 struct cm_work *work;
3096 enum ib_cm_event_type event;
3097 int paths = 0;
3098
3099 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3100 case CM_REQ_ATTR_ID:
3101 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3102 alt_local_lid != 0);
3103 event = IB_CM_REQ_RECEIVED;
3104 break;
3105 case CM_MRA_ATTR_ID:
3106 event = IB_CM_MRA_RECEIVED;
3107 break;
3108 case CM_REJ_ATTR_ID:
3109 event = IB_CM_REJ_RECEIVED;
3110 break;
3111 case CM_REP_ATTR_ID:
3112 event = IB_CM_REP_RECEIVED;
3113 break;
3114 case CM_RTU_ATTR_ID:
3115 event = IB_CM_RTU_RECEIVED;
3116 break;
3117 case CM_DREQ_ATTR_ID:
3118 event = IB_CM_DREQ_RECEIVED;
3119 break;
3120 case CM_DREP_ATTR_ID:
3121 event = IB_CM_DREP_RECEIVED;
3122 break;
3123 case CM_SIDR_REQ_ATTR_ID:
3124 event = IB_CM_SIDR_REQ_RECEIVED;
3125 break;
3126 case CM_SIDR_REP_ATTR_ID:
3127 event = IB_CM_SIDR_REP_RECEIVED;
3128 break;
3129 case CM_LAP_ATTR_ID:
3130 paths = 1;
3131 event = IB_CM_LAP_RECEIVED;
3132 break;
3133 case CM_APR_ATTR_ID:
3134 event = IB_CM_APR_RECEIVED;
3135 break;
3136 default:
3137 ib_free_recv_mad(mad_recv_wc);
3138 return;
3139 }
3140
3141 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3142 GFP_KERNEL);
3143 if (!work) {
3144 ib_free_recv_mad(mad_recv_wc);
3145 return;
3146 }
3147
3148 INIT_WORK(&work->work, cm_work_handler, work);
3149 work->cm_event.event = event;
3150 work->mad_recv_wc = mad_recv_wc;
3151 work->port = (struct cm_port *)mad_agent->context;
3152 queue_work(cm.wq, &work->work);
3153}
3154
3155static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3156 struct ib_qp_attr *qp_attr,
3157 int *qp_attr_mask)
3158{
3159 unsigned long flags;
3160 int ret;
3161
3162 spin_lock_irqsave(&cm_id_priv->lock, flags);
3163 switch (cm_id_priv->id.state) {
3164 case IB_CM_REQ_SENT:
3165 case IB_CM_MRA_REQ_RCVD:
3166 case IB_CM_REQ_RCVD:
3167 case IB_CM_MRA_REQ_SENT:
3168 case IB_CM_REP_RCVD:
3169 case IB_CM_MRA_REP_SENT:
3170 case IB_CM_REP_SENT:
3171 case IB_CM_MRA_REP_RCVD:
3172 case IB_CM_ESTABLISHED:
3173 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3174 IB_QP_PKEY_INDEX | IB_QP_PORT;
e31353ea 3175 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
a977049d 3176 if (cm_id_priv->responder_resources)
c1f250c0
SH		 3177 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3178 IB_ACCESS_REMOTE_ATOMIC;
a977049d
HR		 3179 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3180 qp_attr->port_num = cm_id_priv->av.port->port_num;
3181 ret = 0;
3182 break;
3183 default:
3184 ret = -EINVAL;
3185 break;
3186 }
3187 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3188 return ret;
3189}
3190
3191static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3192 struct ib_qp_attr *qp_attr,
3193 int *qp_attr_mask)
3194{
3195 unsigned long flags;
3196 int ret;
3197
3198 spin_lock_irqsave(&cm_id_priv->lock, flags);
3199 switch (cm_id_priv->id.state) {
3200 case IB_CM_REQ_RCVD:
3201 case IB_CM_MRA_REQ_SENT:
3202 case IB_CM_REP_RCVD:
3203 case IB_CM_MRA_REP_SENT:
3204 case IB_CM_REP_SENT:
3205 case IB_CM_MRA_REP_RCVD:
3206 case IB_CM_ESTABLISHED:
3207 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 3208 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d
HR		 3209 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3210 qp_attr->path_mtu = cm_id_priv->path_mtu;
3211 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3212 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
ae7971a7
SH		 3213 if (cm_id_priv->qp_type == IB_QPT_RC) {
3214 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3215 IB_QP_MIN_RNR_TIMER;
3216 qp_attr->max_dest_rd_atomic =
3217 cm_id_priv->responder_resources;
3218 qp_attr->min_rnr_timer = 0;
3219 }
a977049d
HR		 3220 if (cm_id_priv->alt_av.ah_attr.dlid) {
3221 *qp_attr_mask |= IB_QP_ALT_PATH;
0d8fdfd7 3222 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
a977049d
HR		 3223 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3224 }
3225 ret = 0;
3226 break;
3227 default:
3228 ret = -EINVAL;
3229 break;
3230 }
3231 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3232 return ret;
3233}
3234
3235static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3236 struct ib_qp_attr *qp_attr,
3237 int *qp_attr_mask)
3238{
3239 unsigned long flags;
3240 int ret;
3241
3242 spin_lock_irqsave(&cm_id_priv->lock, flags);
3243 switch (cm_id_priv->id.state) {
3244 case IB_CM_REP_RCVD:
3245 case IB_CM_MRA_REP_SENT:
3246 case IB_CM_REP_SENT:
3247 case IB_CM_MRA_REP_RCVD:
3248 case IB_CM_ESTABLISHED:
ae7971a7 3249 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
a977049d 3250 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
ae7971a7
SH		 3251 if (cm_id_priv->qp_type == IB_QPT_RC) {
3252 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3253 IB_QP_RNR_RETRY |
3254 IB_QP_MAX_QP_RD_ATOMIC;
3255 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3256 qp_attr->retry_cnt = cm_id_priv->retry_count;
3257 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3258 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3259 }
a977049d
HR		 3260 if (cm_id_priv->alt_av.ah_attr.dlid) {
3261 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3262 qp_attr->path_mig_state = IB_MIG_REARM;
3263 }
3264 ret = 0;
3265 break;
3266 default:
3267 ret = -EINVAL;
3268 break;
3269 }
3270 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3271 return ret;
3272}
3273
3274int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3275 struct ib_qp_attr *qp_attr,
3276 int *qp_attr_mask)
3277{
3278 struct cm_id_private *cm_id_priv;
3279 int ret;
3280
3281 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3282 switch (qp_attr->qp_state) {
3283 case IB_QPS_INIT:
3284 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3285 break;
3286 case IB_QPS_RTR:
3287 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3288 break;
3289 case IB_QPS_RTS:
3290 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3291 break;
3292 default:
3293 ret = -EINVAL;
3294 break;
3295 }
3296 return ret;
3297}
3298EXPORT_SYMBOL(ib_cm_init_qp_attr);
3299
a977049d
HR		 3300static void cm_add_one(struct ib_device *device)
3301{
3302 struct cm_device *cm_dev;
3303 struct cm_port *port;
3304 struct ib_mad_reg_req reg_req = {
3305 .mgmt_class = IB_MGMT_CLASS_CM,
3306 .mgmt_class_version = IB_CM_CLASS_VERSION
3307 };
3308 struct ib_port_modify port_modify = {
3309 .set_port_cap_mask = IB_PORT_CM_SUP
3310 };
3311 unsigned long flags;
3312 int ret;
3313 u8 i;
3314
07ebafba
TT		 3315 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
3316 return;
3317
a977049d
HR		 3318 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3319 device->phys_port_cnt, GFP_KERNEL);
3320 if (!cm_dev)
3321 return;
3322
3323 cm_dev->device = device;
cf311cd4 3324 cm_dev->ca_guid = device->node_guid;
a977049d
HR		 3325
3326 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3327 for (i = 1; i <= device->phys_port_cnt; i++) {
3328 port = &cm_dev->port[i-1];
3329 port->cm_dev = cm_dev;
3330 port->port_num = i;
3331 port->mad_agent = ib_register_mad_agent(device, i,
3332 IB_QPT_GSI,
3333 &reg_req,
3334 0,
3335 cm_send_handler,
3336 cm_recv_handler,
3337 port);
3338 if (IS_ERR(port->mad_agent))
cf311cd4 3339 goto error1;
a977049d
HR		 3340
3341 ret = ib_modify_port(device, i, 0, &port_modify);
3342 if (ret)
cf311cd4 3343 goto error2;
a977049d
HR		 3344 }
3345 ib_set_client_data(device, &cm_client, cm_dev);
3346
3347 write_lock_irqsave(&cm.device_lock, flags);
3348 list_add_tail(&cm_dev->list, &cm.device_list);
3349 write_unlock_irqrestore(&cm.device_lock, flags);
3350 return;
3351
a977049d 3352error2:
cf311cd4
SH		 3353 ib_unregister_mad_agent(port->mad_agent);
3354error1:
a977049d
HR		 3355 port_modify.set_port_cap_mask = 0;
3356 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3357 while (--i) {
3358 port = &cm_dev->port[i-1];
3359 ib_modify_port(device, port->port_num, 0, &port_modify);
3360 ib_unregister_mad_agent(port->mad_agent);
3361 }
a977049d
HR		 3362 kfree(cm_dev);
3363}
3364
3365static void cm_remove_one(struct ib_device *device)
3366{
3367 struct cm_device *cm_dev;
3368 struct cm_port *port;
3369 struct ib_port_modify port_modify = {
3370 .clr_port_cap_mask = IB_PORT_CM_SUP
3371 };
3372 unsigned long flags;
3373 int i;
3374
3375 cm_dev = ib_get_client_data(device, &cm_client);
3376 if (!cm_dev)
3377 return;
3378
3379 write_lock_irqsave(&cm.device_lock, flags);
3380 list_del(&cm_dev->list);
3381 write_unlock_irqrestore(&cm.device_lock, flags);
3382
3383 for (i = 1; i <= device->phys_port_cnt; i++) {
3384 port = &cm_dev->port[i-1];
3385 ib_modify_port(device, port->port_num, 0, &port_modify);
3386 ib_unregister_mad_agent(port->mad_agent);
3387 }
3388 kfree(cm_dev);
3389}
3390
3391static int __init ib_cm_init(void)
3392{
3393 int ret;
3394
3395 memset(&cm, 0, sizeof cm);
3396 INIT_LIST_HEAD(&cm.device_list);
3397 rwlock_init(&cm.device_lock);
3398 spin_lock_init(&cm.lock);
3399 cm.listen_service_table = RB_ROOT;
3400 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3401 cm.remote_id_table = RB_ROOT;
3402 cm.remote_qp_table = RB_ROOT;
3403 cm.remote_sidr_table = RB_ROOT;
3404 idr_init(&cm.local_id_table);
f06d2653 3405 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
a977049d 3406 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
8575329d 3407 INIT_LIST_HEAD(&cm.timewait_list);
a977049d
HR		 3408
3409 cm.wq = create_workqueue("ib_cm");
3410 if (!cm.wq)
3411 return -ENOMEM;
3412
3413 ret = ib_register_client(&cm_client);
3414 if (ret)
3415 goto error;
3416
3417 return 0;
3418error:
3419 destroy_workqueue(cm.wq);
3420 return ret;
3421}
3422
3423static void __exit ib_cm_cleanup(void)
3424{
8575329d
SH		 3425 struct cm_timewait_info *timewait_info, *tmp;
3426
3427 spin_lock_irq(&cm.lock);
3428 list_for_each_entry(timewait_info, &cm.timewait_list, list)
3429 cancel_delayed_work(&timewait_info->work.work);
3430 spin_unlock_irq(&cm.lock);
3431
a977049d 3432 destroy_workqueue(cm.wq);
8575329d
SH		 3433
3434 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
3435 list_del(&timewait_info->list);
3436 kfree(timewait_info);
3437 }
3438
a977049d 3439 ib_unregister_client(&cm_client);
5d7edb3c 3440 idr_destroy(&cm.local_id_table);
a977049d
HR		 3441}
3442
3443module_init(ib_cm_init);
3444module_exit(ib_cm_cleanup);
3445
Linux kernel - Deliverables
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