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WorkStruct: Pass the work_struct pointer instead of context data
[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
243 data = kmalloc(private_data_len, GFP_KERNEL);
244 if (!data)
245 return ERR_PTR(-ENOMEM);
246
247 memcpy(data, private_data, private_data_len);
248 return data;
249}
250
251static void cm_set_private_data(struct cm_id_private *cm_id_priv,
252 void *private_data, u8 private_data_len)
253{
254 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
255 kfree(cm_id_priv->private_data);
256
257 cm_id_priv->private_data = private_data;
258 cm_id_priv->private_data_len = private_data_len;
259}
260
ca222c6b
SH		 261static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
262 struct ib_grh *grh, struct cm_av *av)
a977049d
HR		 263{
264 av->port = port;
265 av->pkey_index = wc->pkey_index;
ca222c6b
SH		 266 ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc,
267 grh, &av->ah_attr);
a977049d
HR		 268}
269
270static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
271{
272 struct cm_device *cm_dev;
273 struct cm_port *port = NULL;
274 unsigned long flags;
275 int ret;
276 u8 p;
277
278 read_lock_irqsave(&cm.device_lock, flags);
279 list_for_each_entry(cm_dev, &cm.device_list, list) {
280 if (!ib_find_cached_gid(cm_dev->device, &path->sgid,
281 &p, NULL)) {
282 port = &cm_dev->port[p-1];
283 break;
284 }
285 }
286 read_unlock_irqrestore(&cm.device_lock, flags);
287
288 if (!port)
289 return -EINVAL;
290
291 ret = ib_find_cached_pkey(cm_dev->device, port->port_num,
292 be16_to_cpu(path->pkey), &av->pkey_index);
293 if (ret)
294 return ret;
295
296 av->port = port;
ca222c6b
SH		 297 ib_init_ah_from_path(cm_dev->device, port->port_num, path,
298 &av->ah_attr);
a977049d
HR		 299 av->packet_life_time = path->packet_life_time;
300 return 0;
301}
302
303static int cm_alloc_id(struct cm_id_private *cm_id_priv)
304{
305 unsigned long flags;
f06d2653 306 int ret, id;
de1bb1a6 307 static int next_id;
a977049d
HR		 308
309 do {
310 spin_lock_irqsave(&cm.lock, flags);
f06d2653
SH		 311 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv,
312 next_id++, &id);
a977049d
HR		 313 spin_unlock_irqrestore(&cm.lock, flags);
314 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
f06d2653
SH		 315
316 cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand);
a977049d
HR		 317 return ret;
318}
319
97f52eb4 320static void cm_free_id(__be32 local_id)
a977049d
HR		 321{
322 unsigned long flags;
323
324 spin_lock_irqsave(&cm.lock, flags);
f06d2653
SH		 325 idr_remove(&cm.local_id_table,
326 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 327 spin_unlock_irqrestore(&cm.lock, flags);
328}
329
97f52eb4 330static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 331{
332 struct cm_id_private *cm_id_priv;
333
f06d2653
SH		 334 cm_id_priv = idr_find(&cm.local_id_table,
335 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 336 if (cm_id_priv) {
337 if (cm_id_priv->id.remote_id == remote_id)
338 atomic_inc(&cm_id_priv->refcount);
339 else
340 cm_id_priv = NULL;
341 }
342
343 return cm_id_priv;
344}
345
97f52eb4 346static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 347{
348 struct cm_id_private *cm_id_priv;
349 unsigned long flags;
350
351 spin_lock_irqsave(&cm.lock, flags);
352 cm_id_priv = cm_get_id(local_id, remote_id);
353 spin_unlock_irqrestore(&cm.lock, flags);
354
355 return cm_id_priv;
356}
357
6e61d04f
SH		 358static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
359{
360 int i;
361
362 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
363 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
364 ((unsigned long *) mask)[i];
365}
366
367static int cm_compare_data(struct ib_cm_compare_data *src_data,
368 struct ib_cm_compare_data *dst_data)
369{
370 u8 src[IB_CM_COMPARE_SIZE];
371 u8 dst[IB_CM_COMPARE_SIZE];
372
373 if (!src_data || !dst_data)
374 return 0;
375
376 cm_mask_copy(src, src_data->data, dst_data->mask);
377 cm_mask_copy(dst, dst_data->data, src_data->mask);
378 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
379}
380
381static int cm_compare_private_data(u8 *private_data,
382 struct ib_cm_compare_data *dst_data)
383{
384 u8 src[IB_CM_COMPARE_SIZE];
385
386 if (!dst_data)
387 return 0;
388
389 cm_mask_copy(src, private_data, dst_data->mask);
390 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
391}
392
a977049d
HR		 393static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
394{
395 struct rb_node **link = &cm.listen_service_table.rb_node;
396 struct rb_node *parent = NULL;
397 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 398 __be64 service_id = cm_id_priv->id.service_id;
399 __be64 service_mask = cm_id_priv->id.service_mask;
6e61d04f 400 int data_cmp;
a977049d
HR		 401
402 while (*link) {
403 parent = *link;
404 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
405 service_node);
6e61d04f
SH		 406 data_cmp = cm_compare_data(cm_id_priv->compare_data,
407 cur_cm_id_priv->compare_data);
a977049d 408 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0 409 (service_mask & cur_cm_id_priv->id.service_id) &&
6e61d04f
SH		 410 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
411 !data_cmp)
07d357d0
SH		 412 return cur_cm_id_priv;
413
414 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
415 link = &(*link)->rb_left;
416 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
417 link = &(*link)->rb_right;
418 else if (service_id < cur_cm_id_priv->id.service_id)
a977049d 419 link = &(*link)->rb_left;
6e61d04f
SH		 420 else if (service_id > cur_cm_id_priv->id.service_id)
421 link = &(*link)->rb_right;
422 else if (data_cmp < 0)
423 link = &(*link)->rb_left;
a977049d
HR		 424 else
425 link = &(*link)->rb_right;
426 }
427 rb_link_node(&cm_id_priv->service_node, parent, link);
428 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
429 return NULL;
430}
431
07d357d0 432static struct cm_id_private * cm_find_listen(struct ib_device *device,
6e61d04f
SH		 433 __be64 service_id,
434 u8 *private_data)
a977049d
HR		 435{
436 struct rb_node *node = cm.listen_service_table.rb_node;
437 struct cm_id_private *cm_id_priv;
6e61d04f 438 int data_cmp;
a977049d
HR		 439
440 while (node) {
441 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
6e61d04f
SH		 442 data_cmp = cm_compare_private_data(private_data,
443 cm_id_priv->compare_data);
a977049d 444 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0 445 cm_id_priv->id.service_id &&
6e61d04f 446 (cm_id_priv->id.device == device) && !data_cmp)
a977049d 447 return cm_id_priv;
07d357d0
SH		 448
449 if (device < cm_id_priv->id.device)
450 node = node->rb_left;
451 else if (device > cm_id_priv->id.device)
452 node = node->rb_right;
453 else if (service_id < cm_id_priv->id.service_id)
a977049d 454 node = node->rb_left;
6e61d04f
SH		 455 else if (service_id > cm_id_priv->id.service_id)
456 node = node->rb_right;
457 else if (data_cmp < 0)
458 node = node->rb_left;
a977049d
HR		 459 else
460 node = node->rb_right;
461 }
462 return NULL;
463}
464
465static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
466 *timewait_info)
467{
468 struct rb_node **link = &cm.remote_id_table.rb_node;
469 struct rb_node *parent = NULL;
470 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 471 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
472 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 473
474 while (*link) {
475 parent = *link;
476 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
477 remote_id_node);
478 if (remote_id < cur_timewait_info->work.remote_id)
479 link = &(*link)->rb_left;
480 else if (remote_id > cur_timewait_info->work.remote_id)
481 link = &(*link)->rb_right;
482 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
483 link = &(*link)->rb_left;
484 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
485 link = &(*link)->rb_right;
486 else
487 return cur_timewait_info;
488 }
489 timewait_info->inserted_remote_id = 1;
490 rb_link_node(&timewait_info->remote_id_node, parent, link);
491 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
492 return NULL;
493}
494
97f52eb4
SH		 495static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
496 __be32 remote_id)
a977049d
HR		 497{
498 struct rb_node *node = cm.remote_id_table.rb_node;
499 struct cm_timewait_info *timewait_info;
500
501 while (node) {
502 timewait_info = rb_entry(node, struct cm_timewait_info,
503 remote_id_node);
504 if (remote_id < timewait_info->work.remote_id)
505 node = node->rb_left;
506 else if (remote_id > timewait_info->work.remote_id)
507 node = node->rb_right;
508 else if (remote_ca_guid < timewait_info->remote_ca_guid)
509 node = node->rb_left;
510 else if (remote_ca_guid > timewait_info->remote_ca_guid)
511 node = node->rb_right;
512 else
513 return timewait_info;
514 }
515 return NULL;
516}
517
518static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
519 *timewait_info)
520{
521 struct rb_node **link = &cm.remote_qp_table.rb_node;
522 struct rb_node *parent = NULL;
523 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 524 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
525 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 526
527 while (*link) {
528 parent = *link;
529 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
530 remote_qp_node);
531 if (remote_qpn < cur_timewait_info->remote_qpn)
532 link = &(*link)->rb_left;
533 else if (remote_qpn > cur_timewait_info->remote_qpn)
534 link = &(*link)->rb_right;
535 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid)
536 link = &(*link)->rb_left;
537 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid)
538 link = &(*link)->rb_right;
539 else
540 return cur_timewait_info;
541 }
542 timewait_info->inserted_remote_qp = 1;
543 rb_link_node(&timewait_info->remote_qp_node, parent, link);
544 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
545 return NULL;
546}
547
548static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
549 *cm_id_priv)
550{
551 struct rb_node **link = &cm.remote_sidr_table.rb_node;
552 struct rb_node *parent = NULL;
553 struct cm_id_private *cur_cm_id_priv;
554 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 555 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 556
557 while (*link) {
558 parent = *link;
559 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
560 sidr_id_node);
561 if (remote_id < cur_cm_id_priv->id.remote_id)
562 link = &(*link)->rb_left;
563 else if (remote_id > cur_cm_id_priv->id.remote_id)
564 link = &(*link)->rb_right;
565 else {
566 int cmp;
567 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
568 sizeof *port_gid);
569 if (cmp < 0)
570 link = &(*link)->rb_left;
571 else if (cmp > 0)
572 link = &(*link)->rb_right;
573 else
574 return cur_cm_id_priv;
575 }
576 }
577 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
578 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
579 return NULL;
580}
581
582static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
583 enum ib_cm_sidr_status status)
584{
585 struct ib_cm_sidr_rep_param param;
586
587 memset(&param, 0, sizeof param);
588 param.status = status;
589 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
590}
591
07d357d0
SH		 592struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
593 ib_cm_handler cm_handler,
a977049d
HR		 594 void *context)
595{
596 struct cm_id_private *cm_id_priv;
597 int ret;
598
de6eb66b 599 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
a977049d
HR		 600 if (!cm_id_priv)
601 return ERR_PTR(-ENOMEM);
602
a977049d 603 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 604 cm_id_priv->id.device = device;
a977049d
HR		 605 cm_id_priv->id.cm_handler = cm_handler;
606 cm_id_priv->id.context = context;
354ba39c 607 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 608 ret = cm_alloc_id(cm_id_priv);
609 if (ret)
610 goto error;
611
612 spin_lock_init(&cm_id_priv->lock);
1b52fa98 613 init_completion(&cm_id_priv->comp);
a977049d
HR		 614 INIT_LIST_HEAD(&cm_id_priv->work_list);
615 atomic_set(&cm_id_priv->work_count, -1);
616 atomic_set(&cm_id_priv->refcount, 1);
617 return &cm_id_priv->id;
618
619error:
620 kfree(cm_id_priv);
621 return ERR_PTR(-ENOMEM);
622}
623EXPORT_SYMBOL(ib_create_cm_id);
624
625static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
626{
627 struct cm_work *work;
628
629 if (list_empty(&cm_id_priv->work_list))
630 return NULL;
631
632 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
633 list_del(&work->list);
634 return work;
635}
636
637static void cm_free_work(struct cm_work *work)
638{
639 if (work->mad_recv_wc)
640 ib_free_recv_mad(work->mad_recv_wc);
641 kfree(work);
642}
643
644static inline int cm_convert_to_ms(int iba_time)
645{
646 /* approximate conversion to ms from 4.096us x 2^iba_time */
647 return 1 << max(iba_time - 8, 0);
648}
649
650static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
651{
a977049d
HR		 652 if (timewait_info->inserted_remote_id) {
653 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
654 timewait_info->inserted_remote_id = 0;
655 }
656
657 if (timewait_info->inserted_remote_qp) {
658 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
659 timewait_info->inserted_remote_qp = 0;
660 }
a977049d
HR		 661}
662
97f52eb4 663static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 664{
665 struct cm_timewait_info *timewait_info;
666
de6eb66b 667 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
a977049d
HR		 668 if (!timewait_info)
669 return ERR_PTR(-ENOMEM);
a977049d
HR		 670
671 timewait_info->work.local_id = local_id;
672 INIT_WORK(&timewait_info->work.work, cm_work_handler,
673 &timewait_info->work);
674 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
675 return timewait_info;
676}
677
678static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
679{
680 int wait_time;
8575329d 681 unsigned long flags;
a977049d 682
8575329d 683 spin_lock_irqsave(&cm.lock, flags);
a70d0590 684 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d
SH		 685 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
686 spin_unlock_irqrestore(&cm.lock, flags);
a70d0590 687
a977049d
HR		 688 /*
689 * The cm_id could be destroyed by the user before we exit timewait.
690 * To protect against this, we search for the cm_id after exiting
691 * timewait before notifying the user that we've exited timewait.
692 */
693 cm_id_priv->id.state = IB_CM_TIMEWAIT;
694 wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout);
695 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
696 msecs_to_jiffies(wait_time));
697 cm_id_priv->timewait_info = NULL;
698}
699
700static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
701{
8575329d
SH		 702 unsigned long flags;
703
a977049d
HR		 704 cm_id_priv->id.state = IB_CM_IDLE;
705 if (cm_id_priv->timewait_info) {
8575329d 706 spin_lock_irqsave(&cm.lock, flags);
a977049d 707 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d 708 spin_unlock_irqrestore(&cm.lock, flags);
a977049d
HR		 709 kfree(cm_id_priv->timewait_info);
710 cm_id_priv->timewait_info = NULL;
711 }
712}
713
04c33543 714static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
a977049d
HR		 715{
716 struct cm_id_private *cm_id_priv;
717 struct cm_work *work;
718 unsigned long flags;
719
720 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
721retest:
722 spin_lock_irqsave(&cm_id_priv->lock, flags);
723 switch (cm_id->state) {
724 case IB_CM_LISTEN:
725 cm_id->state = IB_CM_IDLE;
726 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
727 spin_lock_irqsave(&cm.lock, flags);
728 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
729 spin_unlock_irqrestore(&cm.lock, flags);
730 break;
731 case IB_CM_SIDR_REQ_SENT:
732 cm_id->state = IB_CM_IDLE;
34816ad9 733 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 734 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
735 break;
736 case IB_CM_SIDR_REQ_RCVD:
737 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
738 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
739 break;
740 case IB_CM_REQ_SENT:
227eca83
SH		 741 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
742 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
743 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
744 &cm_id_priv->av.port->cm_dev->ca_guid,
745 sizeof cm_id_priv->av.port->cm_dev->ca_guid,
746 NULL, 0);
747 break;
04c33543
MT		 748 case IB_CM_REQ_RCVD:
749 if (err == -ENOMEM) {
750 /* Do not reject to allow future retries. */
751 cm_reset_to_idle(cm_id_priv);
752 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
753 } else {
754 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
755 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
756 NULL, 0, NULL, 0);
757 }
758 break;
a977049d
HR		 759 case IB_CM_MRA_REQ_RCVD:
760 case IB_CM_REP_SENT:
761 case IB_CM_MRA_REP_RCVD:
34816ad9 762 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 763 /* Fall through */
a977049d
HR		 764 case IB_CM_MRA_REQ_SENT:
765 case IB_CM_REP_RCVD:
766 case IB_CM_MRA_REP_SENT:
767 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
227eca83
SH		 768 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
769 NULL, 0, NULL, 0);
a977049d
HR		 770 break;
771 case IB_CM_ESTABLISHED:
772 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
773 ib_send_cm_dreq(cm_id, NULL, 0);
774 goto retest;
775 case IB_CM_DREQ_SENT:
34816ad9 776 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 777 cm_enter_timewait(cm_id_priv);
778 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
779 break;
780 case IB_CM_DREQ_RCVD:
781 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
782 ib_send_cm_drep(cm_id, NULL, 0);
783 break;
784 default:
785 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
786 break;
787 }
788
789 cm_free_id(cm_id->local_id);
1b52fa98
SH		 790 cm_deref_id(cm_id_priv);
791 wait_for_completion(&cm_id_priv->comp);
a977049d
HR		 792 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
793 cm_free_work(work);
6e61d04f
SH		 794 kfree(cm_id_priv->compare_data);
795 kfree(cm_id_priv->private_data);
a977049d
HR		 796 kfree(cm_id_priv);
797}
04c33543
MT		 798
799void ib_destroy_cm_id(struct ib_cm_id *cm_id)
800{
801 cm_destroy_id(cm_id, 0);
802}
a977049d
HR		 803EXPORT_SYMBOL(ib_destroy_cm_id);
804
6e61d04f
SH		 805int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
806 struct ib_cm_compare_data *compare_data)
a977049d
HR		 807{
808 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
809 unsigned long flags;
810 int ret = 0;
811
97f52eb4
SH		 812 service_mask = service_mask ? service_mask :
813 __constant_cpu_to_be64(~0ULL);
a977049d
HR		 814 service_id &= service_mask;
815 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
816 (service_id != IB_CM_ASSIGN_SERVICE_ID))
817 return -EINVAL;
818
819 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
6e61d04f
SH		 820 if (cm_id->state != IB_CM_IDLE)
821 return -EINVAL;
822
823 if (compare_data) {
824 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
825 GFP_KERNEL);
826 if (!cm_id_priv->compare_data)
827 return -ENOMEM;
828 cm_mask_copy(cm_id_priv->compare_data->data,
829 compare_data->data, compare_data->mask);
830 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
831 IB_CM_COMPARE_SIZE);
832 }
a977049d
HR		 833
834 cm_id->state = IB_CM_LISTEN;
835
836 spin_lock_irqsave(&cm.lock, flags);
837 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
97f52eb4
SH		 838 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
839 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 840 } else {
841 cm_id->service_id = service_id;
842 cm_id->service_mask = service_mask;
843 }
844 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
845 spin_unlock_irqrestore(&cm.lock, flags);
846
847 if (cur_cm_id_priv) {
848 cm_id->state = IB_CM_IDLE;
6e61d04f
SH		 849 kfree(cm_id_priv->compare_data);
850 cm_id_priv->compare_data = NULL;
a977049d
HR		 851 ret = -EBUSY;
852 }
853 return ret;
854}
855EXPORT_SYMBOL(ib_cm_listen);
856
97f52eb4
SH		 857static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
858 enum cm_msg_sequence msg_seq)
a977049d
HR		 859{
860 u64 hi_tid, low_tid;
861
862 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
97f52eb4
SH		 863 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
864 (msg_seq << 30));
a977049d
HR		 865 return cpu_to_be64(hi_tid | low_tid);
866}
867
868static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 869 __be16 attr_id, __be64 tid)
a977049d
HR		 870{
871 hdr->base_version = IB_MGMT_BASE_VERSION;
872 hdr->mgmt_class = IB_MGMT_CLASS_CM;
873 hdr->class_version = IB_CM_CLASS_VERSION;
874 hdr->method = IB_MGMT_METHOD_SEND;
875 hdr->attr_id = attr_id;
876 hdr->tid = tid;
877}
878
879static void cm_format_req(struct cm_req_msg *req_msg,
880 struct cm_id_private *cm_id_priv,
881 struct ib_cm_req_param *param)
882{
883 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
884 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
885
886 req_msg->local_comm_id = cm_id_priv->id.local_id;
887 req_msg->service_id = param->service_id;
888 req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
889 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
890 cm_req_set_resp_res(req_msg, param->responder_resources);
891 cm_req_set_init_depth(req_msg, param->initiator_depth);
892 cm_req_set_remote_resp_timeout(req_msg,
893 param->remote_cm_response_timeout);
894 cm_req_set_qp_type(req_msg, param->qp_type);
895 cm_req_set_flow_ctrl(req_msg, param->flow_control);
896 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
897 cm_req_set_local_resp_timeout(req_msg,
898 param->local_cm_response_timeout);
899 cm_req_set_retry_count(req_msg, param->retry_count);
900 req_msg->pkey = param->primary_path->pkey;
901 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
902 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
903 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
904 cm_req_set_srq(req_msg, param->srq);
905
906 req_msg->primary_local_lid = param->primary_path->slid;
907 req_msg->primary_remote_lid = param->primary_path->dlid;
908 req_msg->primary_local_gid = param->primary_path->sgid;
909 req_msg->primary_remote_gid = param->primary_path->dgid;
910 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label);
911 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate);
912 req_msg->primary_traffic_class = param->primary_path->traffic_class;
913 req_msg->primary_hop_limit = param->primary_path->hop_limit;
914 cm_req_set_primary_sl(req_msg, param->primary_path->sl);
915 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */
916 cm_req_set_primary_local_ack_timeout(req_msg,
917 min(31, param->primary_path->packet_life_time + 1));
918
919 if (param->alternate_path) {
920 req_msg->alt_local_lid = param->alternate_path->slid;
921 req_msg->alt_remote_lid = param->alternate_path->dlid;
922 req_msg->alt_local_gid = param->alternate_path->sgid;
923 req_msg->alt_remote_gid = param->alternate_path->dgid;
924 cm_req_set_alt_flow_label(req_msg,
925 param->alternate_path->flow_label);
926 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate);
927 req_msg->alt_traffic_class = param->alternate_path->traffic_class;
928 req_msg->alt_hop_limit = param->alternate_path->hop_limit;
929 cm_req_set_alt_sl(req_msg, param->alternate_path->sl);
930 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */
931 cm_req_set_alt_local_ack_timeout(req_msg,
932 min(31, param->alternate_path->packet_life_time + 1));
933 }
934
935 if (param->private_data && param->private_data_len)
936 memcpy(req_msg->private_data, param->private_data,
937 param->private_data_len);
938}
939
858119e1 940static int cm_validate_req_param(struct ib_cm_req_param *param)
a977049d
HR		 941{
942 /* peer-to-peer not supported */
943 if (param->peer_to_peer)
944 return -EINVAL;
945
946 if (!param->primary_path)
947 return -EINVAL;
948
949 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
950 return -EINVAL;
951
952 if (param->private_data &&
953 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
954 return -EINVAL;
955
956 if (param->alternate_path &&
957 (param->alternate_path->pkey != param->primary_path->pkey ||
958 param->alternate_path->mtu != param->primary_path->mtu))
959 return -EINVAL;
960
961 return 0;
962}
963
964int ib_send_cm_req(struct ib_cm_id *cm_id,
965 struct ib_cm_req_param *param)
966{
967 struct cm_id_private *cm_id_priv;
a977049d
HR		 968 struct cm_req_msg *req_msg;
969 unsigned long flags;
970 int ret;
971
972 ret = cm_validate_req_param(param);
973 if (ret)
974 return ret;
975
976 /* Verify that we're not in timewait. */
977 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
978 spin_lock_irqsave(&cm_id_priv->lock, flags);
979 if (cm_id->state != IB_CM_IDLE) {
980 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
981 ret = -EINVAL;
982 goto out;
983 }
984 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
985
986 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
987 id.local_id);
75df23e2
SH		 988 if (IS_ERR(cm_id_priv->timewait_info)) {
989 ret = PTR_ERR(cm_id_priv->timewait_info);
a977049d 990 goto out;
75df23e2 991 }
a977049d
HR		 992
993 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
994 if (ret)
995 goto error1;
996 if (param->alternate_path) {
997 ret = cm_init_av_by_path(param->alternate_path,
998 &cm_id_priv->alt_av);
999 if (ret)
1000 goto error1;
1001 }
1002 cm_id->service_id = param->service_id;
97f52eb4 1003 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1004 cm_id_priv->timeout_ms = cm_convert_to_ms(
1005 param->primary_path->packet_life_time) * 2 +
1006 cm_convert_to_ms(
1007 param->remote_cm_response_timeout);
1008 cm_id_priv->max_cm_retries = param->max_cm_retries;
1009 cm_id_priv->initiator_depth = param->initiator_depth;
1010 cm_id_priv->responder_resources = param->responder_resources;
1011 cm_id_priv->retry_count = param->retry_count;
1012 cm_id_priv->path_mtu = param->primary_path->mtu;
ae7971a7 1013 cm_id_priv->qp_type = param->qp_type;
a977049d
HR		 1014
1015 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1016 if (ret)
1017 goto error1;
1018
1019 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1020 cm_format_req(req_msg, cm_id_priv, param);
1021 cm_id_priv->tid = req_msg->hdr.tid;
34816ad9 1022 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1023 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1024
1025 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1026 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
1027 cm_id_priv->local_ack_timeout =
1028 cm_req_get_primary_local_ack_timeout(req_msg);
1029
1030 spin_lock_irqsave(&cm_id_priv->lock, flags);
34816ad9 1031 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
a977049d
HR		 1032 if (ret) {
1033 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1034 goto error2;
1035 }
1036 BUG_ON(cm_id->state != IB_CM_IDLE);
1037 cm_id->state = IB_CM_REQ_SENT;
1038 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1039 return 0;
1040
1041error2: cm_free_msg(cm_id_priv->msg);
1042error1: kfree(cm_id_priv->timewait_info);
1043out: return ret;
1044}
1045EXPORT_SYMBOL(ib_send_cm_req);
1046
1047static int cm_issue_rej(struct cm_port *port,
1048 struct ib_mad_recv_wc *mad_recv_wc,
1049 enum ib_cm_rej_reason reason,
1050 enum cm_msg_response msg_rejected,
1051 void *ari, u8 ari_length)
1052{
1053 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1054 struct cm_rej_msg *rej_msg, *rcv_msg;
1055 int ret;
1056
1057 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1058 if (ret)
1059 return ret;
1060
1061 /* We just need common CM header information. Cast to any message. */
1062 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1063 rej_msg = (struct cm_rej_msg *) msg->mad;
1064
1065 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1066 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1067 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1068 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 1069 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1070
1071 if (ari && ari_length) {
1072 cm_rej_set_reject_info_len(rej_msg, ari_length);
1073 memcpy(rej_msg->ari, ari, ari_length);
1074 }
1075
34816ad9 1076 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1077 if (ret)
1078 cm_free_msg(msg);
1079
1080 return ret;
1081}
1082
97f52eb4
SH		 1083static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1084 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 1085{
1086 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1087 ((local_ca_guid == remote_ca_guid) &&
1088 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1089}
1090
858119e1 1091static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
a977049d
HR		 1092 struct ib_sa_path_rec *primary_path,
1093 struct ib_sa_path_rec *alt_path)
1094{
1095 memset(primary_path, 0, sizeof *primary_path);
1096 primary_path->dgid = req_msg->primary_local_gid;
1097 primary_path->sgid = req_msg->primary_remote_gid;
1098 primary_path->dlid = req_msg->primary_local_lid;
1099 primary_path->slid = req_msg->primary_remote_lid;
1100 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1101 primary_path->hop_limit = req_msg->primary_hop_limit;
1102 primary_path->traffic_class = req_msg->primary_traffic_class;
1103 primary_path->reversible = 1;
1104 primary_path->pkey = req_msg->pkey;
1105 primary_path->sl = cm_req_get_primary_sl(req_msg);
1106 primary_path->mtu_selector = IB_SA_EQ;
1107 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1108 primary_path->rate_selector = IB_SA_EQ;
1109 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1110 primary_path->packet_life_time_selector = IB_SA_EQ;
1111 primary_path->packet_life_time =
1112 cm_req_get_primary_local_ack_timeout(req_msg);
1113 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1114
1115 if (req_msg->alt_local_lid) {
1116 memset(alt_path, 0, sizeof *alt_path);
1117 alt_path->dgid = req_msg->alt_local_gid;
1118 alt_path->sgid = req_msg->alt_remote_gid;
1119 alt_path->dlid = req_msg->alt_local_lid;
1120 alt_path->slid = req_msg->alt_remote_lid;
1121 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1122 alt_path->hop_limit = req_msg->alt_hop_limit;
1123 alt_path->traffic_class = req_msg->alt_traffic_class;
1124 alt_path->reversible = 1;
1125 alt_path->pkey = req_msg->pkey;
1126 alt_path->sl = cm_req_get_alt_sl(req_msg);
1127 alt_path->mtu_selector = IB_SA_EQ;
1128 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1129 alt_path->rate_selector = IB_SA_EQ;
1130 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1131 alt_path->packet_life_time_selector = IB_SA_EQ;
1132 alt_path->packet_life_time =
1133 cm_req_get_alt_local_ack_timeout(req_msg);
1134 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1135 }
1136}
1137
1138static void cm_format_req_event(struct cm_work *work,
1139 struct cm_id_private *cm_id_priv,
1140 struct ib_cm_id *listen_id)
1141{
1142 struct cm_req_msg *req_msg;
1143 struct ib_cm_req_event_param *param;
1144
1145 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1146 param = &work->cm_event.param.req_rcvd;
1147 param->listen_id = listen_id;
a977049d
HR		 1148 param->port = cm_id_priv->av.port->port_num;
1149 param->primary_path = &work->path[0];
1150 if (req_msg->alt_local_lid)
1151 param->alternate_path = &work->path[1];
1152 else
1153 param->alternate_path = NULL;
1154 param->remote_ca_guid = req_msg->local_ca_guid;
1155 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1156 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1157 param->qp_type = cm_req_get_qp_type(req_msg);
1158 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1159 param->responder_resources = cm_req_get_init_depth(req_msg);
1160 param->initiator_depth = cm_req_get_resp_res(req_msg);
1161 param->local_cm_response_timeout =
1162 cm_req_get_remote_resp_timeout(req_msg);
1163 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1164 param->remote_cm_response_timeout =
1165 cm_req_get_local_resp_timeout(req_msg);
1166 param->retry_count = cm_req_get_retry_count(req_msg);
1167 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1168 param->srq = cm_req_get_srq(req_msg);
1169 work->cm_event.private_data = &req_msg->private_data;
1170}
1171
1172static void cm_process_work(struct cm_id_private *cm_id_priv,
1173 struct cm_work *work)
1174{
1175 unsigned long flags;
1176 int ret;
1177
1178 /* We will typically only have the current event to report. */
1179 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1180 cm_free_work(work);
1181
1182 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1183 spin_lock_irqsave(&cm_id_priv->lock, flags);
1184 work = cm_dequeue_work(cm_id_priv);
1185 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1186 BUG_ON(!work);
1187 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1188 &work->cm_event);
1189 cm_free_work(work);
1190 }
1191 cm_deref_id(cm_id_priv);
1192 if (ret)
04c33543 1193 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 1194}
1195
1196static void cm_format_mra(struct cm_mra_msg *mra_msg,
1197 struct cm_id_private *cm_id_priv,
1198 enum cm_msg_response msg_mraed, u8 service_timeout,
1199 const void *private_data, u8 private_data_len)
1200{
1201 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1202 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1203 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1204 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1205 cm_mra_set_service_timeout(mra_msg, service_timeout);
1206
1207 if (private_data && private_data_len)
1208 memcpy(mra_msg->private_data, private_data, private_data_len);
1209}
1210
1211static void cm_format_rej(struct cm_rej_msg *rej_msg,
1212 struct cm_id_private *cm_id_priv,
1213 enum ib_cm_rej_reason reason,
1214 void *ari,
1215 u8 ari_length,
1216 const void *private_data,
1217 u8 private_data_len)
1218{
1219 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1220 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1221
1222 switch(cm_id_priv->id.state) {
1223 case IB_CM_REQ_RCVD:
1224 rej_msg->local_comm_id = 0;
1225 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1226 break;
1227 case IB_CM_MRA_REQ_SENT:
1228 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1229 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1230 break;
1231 case IB_CM_REP_RCVD:
1232 case IB_CM_MRA_REP_SENT:
1233 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1234 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1235 break;
1236 default:
1237 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1238 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1239 break;
1240 }
1241
97f52eb4 1242 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1243 if (ari && ari_length) {
1244 cm_rej_set_reject_info_len(rej_msg, ari_length);
1245 memcpy(rej_msg->ari, ari, ari_length);
1246 }
1247
1248 if (private_data && private_data_len)
1249 memcpy(rej_msg->private_data, private_data, private_data_len);
1250}
1251
1252static void cm_dup_req_handler(struct cm_work *work,
1253 struct cm_id_private *cm_id_priv)
1254{
1255 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1256 unsigned long flags;
1257 int ret;
1258
1259 /* Quick state check to discard duplicate REQs. */
1260 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1261 return;
1262
1263 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1264 if (ret)
1265 return;
1266
1267 spin_lock_irqsave(&cm_id_priv->lock, flags);
1268 switch (cm_id_priv->id.state) {
1269 case IB_CM_MRA_REQ_SENT:
1270 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1271 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1272 cm_id_priv->private_data,
1273 cm_id_priv->private_data_len);
1274 break;
1275 case IB_CM_TIMEWAIT:
1276 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1277 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1278 break;
1279 default:
1280 goto unlock;
1281 }
1282 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1283
34816ad9 1284 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1285 if (ret)
1286 goto free;
1287 return;
1288
1289unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1290free: cm_free_msg(msg);
1291}
1292
1293static struct cm_id_private * cm_match_req(struct cm_work *work,
1294 struct cm_id_private *cm_id_priv)
1295{
1296 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1297 struct cm_timewait_info *timewait_info;
1298 struct cm_req_msg *req_msg;
1299 unsigned long flags;
1300
1301 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1302
1303 /* Check for duplicate REQ and stale connections. */
1304 spin_lock_irqsave(&cm.lock, flags);
1305 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1306 if (!timewait_info)
1307 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1308
1309 if (timewait_info) {
1310 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1311 timewait_info->work.remote_id);
8575329d 1312 cm_cleanup_timewait(cm_id_priv->timewait_info);
a977049d
HR		 1313 spin_unlock_irqrestore(&cm.lock, flags);
1314 if (cur_cm_id_priv) {
1315 cm_dup_req_handler(work, cur_cm_id_priv);
1316 cm_deref_id(cur_cm_id_priv);
1317 } else
1318 cm_issue_rej(work->port, work->mad_recv_wc,
1319 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1320 NULL, 0);
8575329d
SH		 1321 listen_cm_id_priv = NULL;
1322 goto out;
a977049d
HR		 1323 }
1324
1325 /* Find matching listen request. */
07d357d0 1326 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
6e61d04f
SH		 1327 req_msg->service_id,
1328 req_msg->private_data);
a977049d 1329 if (!listen_cm_id_priv) {
8575329d 1330 cm_cleanup_timewait(cm_id_priv->timewait_info);
a977049d
HR		 1331 spin_unlock_irqrestore(&cm.lock, flags);
1332 cm_issue_rej(work->port, work->mad_recv_wc,
1333 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1334 NULL, 0);
8575329d 1335 goto out;
a977049d
HR		 1336 }
1337 atomic_inc(&listen_cm_id_priv->refcount);
1338 atomic_inc(&cm_id_priv->refcount);
1339 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1340 atomic_inc(&cm_id_priv->work_count);
1341 spin_unlock_irqrestore(&cm.lock, flags);
8575329d 1342out:
a977049d 1343 return listen_cm_id_priv;
a977049d
HR		 1344}
1345
1346static int cm_req_handler(struct cm_work *work)
1347{
1348 struct ib_cm_id *cm_id;
1349 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1350 struct cm_req_msg *req_msg;
1351 int ret;
1352
1353 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1354
07d357d0 1355 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 1356 if (IS_ERR(cm_id))
1357 return PTR_ERR(cm_id);
1358
1359 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1360 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1361 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 1362 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 1363 &cm_id_priv->av);
1364 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1365 id.local_id);
1366 if (IS_ERR(cm_id_priv->timewait_info)) {
1367 ret = PTR_ERR(cm_id_priv->timewait_info);
76842405 1368 goto destroy;
a977049d
HR		 1369 }
1370 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1371 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1372 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1373
1374 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1375 if (!listen_cm_id_priv) {
1376 ret = -EINVAL;
76842405
SH		 1377 kfree(cm_id_priv->timewait_info);
1378 goto destroy;
a977049d
HR		 1379 }
1380
1381 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1382 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1383 cm_id_priv->id.service_id = req_msg->service_id;
97f52eb4 1384 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 1385
1386 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1387 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
76842405
SH		 1388 if (ret) {
1389 ib_get_cached_gid(work->port->cm_dev->device,
1390 work->port->port_num, 0, &work->path[0].sgid);
1391 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1392 &work->path[0].sgid, sizeof work->path[0].sgid,
1393 NULL, 0);
1394 goto rejected;
1395 }
a977049d
HR		 1396 if (req_msg->alt_local_lid) {
1397 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
76842405
SH		 1398 if (ret) {
1399 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1400 &work->path[0].sgid,
1401 sizeof work->path[0].sgid, NULL, 0);
1402 goto rejected;
1403 }
a977049d
HR		 1404 }
1405 cm_id_priv->tid = req_msg->hdr.tid;
1406 cm_id_priv->timeout_ms = cm_convert_to_ms(
1407 cm_req_get_local_resp_timeout(req_msg));
1408 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1409 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1410 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1411 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1412 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
1413 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
1414 cm_id_priv->local_ack_timeout =
1415 cm_req_get_primary_local_ack_timeout(req_msg);
1416 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1417 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
ae7971a7 1418 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
a977049d
HR		 1419
1420 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1421 cm_process_work(cm_id_priv, work);
1422 cm_deref_id(listen_cm_id_priv);
1423 return 0;
1424
76842405
SH		 1425rejected:
1426 atomic_dec(&cm_id_priv->refcount);
a977049d 1427 cm_deref_id(listen_cm_id_priv);
76842405
SH		 1428destroy:
1429 ib_destroy_cm_id(cm_id);
a977049d
HR		 1430 return ret;
1431}
1432
1433static void cm_format_rep(struct cm_rep_msg *rep_msg,
1434 struct cm_id_private *cm_id_priv,
1435 struct ib_cm_rep_param *param)
1436{
1437 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1438 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1439 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1440 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
1441 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1442 rep_msg->resp_resources = param->responder_resources;
1443 rep_msg->initiator_depth = param->initiator_depth;
1444 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay);
1445 cm_rep_set_failover(rep_msg, param->failover_accepted);
1446 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1447 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
1448 cm_rep_set_srq(rep_msg, param->srq);
1449 rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid;
1450
1451 if (param->private_data && param->private_data_len)
1452 memcpy(rep_msg->private_data, param->private_data,
1453 param->private_data_len);
1454}
1455
1456int ib_send_cm_rep(struct ib_cm_id *cm_id,
1457 struct ib_cm_rep_param *param)
1458{
1459 struct cm_id_private *cm_id_priv;
1460 struct ib_mad_send_buf *msg;
1461 struct cm_rep_msg *rep_msg;
a977049d
HR		 1462 unsigned long flags;
1463 int ret;
1464
1465 if (param->private_data &&
1466 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1467 return -EINVAL;
1468
1469 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1470 spin_lock_irqsave(&cm_id_priv->lock, flags);
1471 if (cm_id->state != IB_CM_REQ_RCVD &&
1472 cm_id->state != IB_CM_MRA_REQ_SENT) {
1473 ret = -EINVAL;
1474 goto out;
1475 }
1476
1477 ret = cm_alloc_msg(cm_id_priv, &msg);
1478 if (ret)
1479 goto out;
1480
1481 rep_msg = (struct cm_rep_msg *) msg->mad;
1482 cm_format_rep(rep_msg, cm_id_priv, param);
34816ad9 1483 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1484 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1485
34816ad9 1486 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1487 if (ret) {
1488 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1489 cm_free_msg(msg);
1490 return ret;
1491 }
1492
1493 cm_id->state = IB_CM_REP_SENT;
1494 cm_id_priv->msg = msg;
1495 cm_id_priv->initiator_depth = param->initiator_depth;
1496 cm_id_priv->responder_resources = param->responder_resources;
1497 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
1498 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg);
1499
1500out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1501 return ret;
1502}
1503EXPORT_SYMBOL(ib_send_cm_rep);
1504
1505static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1506 struct cm_id_private *cm_id_priv,
1507 const void *private_data,
1508 u8 private_data_len)
1509{
1510 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1511 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1512 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1513
1514 if (private_data && private_data_len)
1515 memcpy(rtu_msg->private_data, private_data, private_data_len);
1516}
1517
1518int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1519 const void *private_data,
1520 u8 private_data_len)
1521{
1522 struct cm_id_private *cm_id_priv;
1523 struct ib_mad_send_buf *msg;
a977049d
HR		 1524 unsigned long flags;
1525 void *data;
1526 int ret;
1527
1528 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1529 return -EINVAL;
1530
1531 data = cm_copy_private_data(private_data, private_data_len);
1532 if (IS_ERR(data))
1533 return PTR_ERR(data);
1534
1535 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1536 spin_lock_irqsave(&cm_id_priv->lock, flags);
1537 if (cm_id->state != IB_CM_REP_RCVD &&
1538 cm_id->state != IB_CM_MRA_REP_SENT) {
1539 ret = -EINVAL;
1540 goto error;
1541 }
1542
1543 ret = cm_alloc_msg(cm_id_priv, &msg);
1544 if (ret)
1545 goto error;
1546
1547 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1548 private_data, private_data_len);
1549
34816ad9 1550 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1551 if (ret) {
1552 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1553 cm_free_msg(msg);
1554 kfree(data);
1555 return ret;
1556 }
1557
1558 cm_id->state = IB_CM_ESTABLISHED;
1559 cm_set_private_data(cm_id_priv, data, private_data_len);
1560 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1561 return 0;
1562
1563error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1564 kfree(data);
1565 return ret;
1566}
1567EXPORT_SYMBOL(ib_send_cm_rtu);
1568
1569static void cm_format_rep_event(struct cm_work *work)
1570{
1571 struct cm_rep_msg *rep_msg;
1572 struct ib_cm_rep_event_param *param;
1573
1574 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1575 param = &work->cm_event.param.rep_rcvd;
1576 param->remote_ca_guid = rep_msg->local_ca_guid;
1577 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
1578 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg));
1579 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1580 param->responder_resources = rep_msg->initiator_depth;
1581 param->initiator_depth = rep_msg->resp_resources;
1582 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1583 param->failover_accepted = cm_rep_get_failover(rep_msg);
1584 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1585 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1586 param->srq = cm_rep_get_srq(rep_msg);
1587 work->cm_event.private_data = &rep_msg->private_data;
1588}
1589
1590static void cm_dup_rep_handler(struct cm_work *work)
1591{
1592 struct cm_id_private *cm_id_priv;
1593 struct cm_rep_msg *rep_msg;
1594 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1595 unsigned long flags;
1596 int ret;
1597
1598 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1599 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1600 rep_msg->local_comm_id);
1601 if (!cm_id_priv)
1602 return;
1603
1604 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1605 if (ret)
1606 goto deref;
1607
1608 spin_lock_irqsave(&cm_id_priv->lock, flags);
1609 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1610 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1611 cm_id_priv->private_data,
1612 cm_id_priv->private_data_len);
1613 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1614 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1615 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1616 cm_id_priv->private_data,
1617 cm_id_priv->private_data_len);
1618 else
1619 goto unlock;
1620 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1621
34816ad9 1622 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1623 if (ret)
1624 goto free;
1625 goto deref;
1626
1627unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1628free: cm_free_msg(msg);
1629deref: cm_deref_id(cm_id_priv);
1630}
1631
1632static int cm_rep_handler(struct cm_work *work)
1633{
1634 struct cm_id_private *cm_id_priv;
1635 struct cm_rep_msg *rep_msg;
1636 unsigned long flags;
1637 int ret;
1638
1639 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1640 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1641 if (!cm_id_priv) {
1642 cm_dup_rep_handler(work);
1643 return -EINVAL;
1644 }
1645
87fd1a11
SH		 1646 cm_format_rep_event(work);
1647
1648 spin_lock_irqsave(&cm_id_priv->lock, flags);
1649 switch (cm_id_priv->id.state) {
1650 case IB_CM_REQ_SENT:
1651 case IB_CM_MRA_REQ_RCVD:
1652 break;
1653 default:
1654 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1655 ret = -EINVAL;
1656 goto error;
1657 }
1658
a977049d
HR		 1659 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1660 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
1661 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1662
87fd1a11 1663 spin_lock(&cm.lock);
a977049d
HR		 1664 /* Check for duplicate REP. */
1665 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1666 spin_unlock(&cm.lock);
1667 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1668 ret = -EINVAL;
1669 goto error;
1670 }
1671 /* Check for a stale connection. */
1672 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1673 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1674 &cm.remote_id_table);
1675 cm_id_priv->timewait_info->inserted_remote_id = 0;
1676 spin_unlock(&cm.lock);
1677 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 1678 cm_issue_rej(work->port, work->mad_recv_wc,
1679 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1680 NULL, 0);
1681 ret = -EINVAL;
1682 goto error;
1683 }
87fd1a11 1684 spin_unlock(&cm.lock);
a977049d 1685
a977049d
HR		 1686 cm_id_priv->id.state = IB_CM_REP_RCVD;
1687 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
1688 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg);
1689 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1690 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1691 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1692 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1693
1694 /* todo: handle peer_to_peer */
1695
34816ad9 1696 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1697 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1698 if (!ret)
1699 list_add_tail(&work->list, &cm_id_priv->work_list);
1700 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1701
1702 if (ret)
1703 cm_process_work(cm_id_priv, work);
1704 else
1705 cm_deref_id(cm_id_priv);
1706 return 0;
1707
87fd1a11 1708error:
a977049d
HR		 1709 cm_deref_id(cm_id_priv);
1710 return ret;
1711}
1712
1713static int cm_establish_handler(struct cm_work *work)
1714{
1715 struct cm_id_private *cm_id_priv;
1716 unsigned long flags;
1717 int ret;
1718
1719 /* See comment in ib_cm_establish about lookup. */
1720 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1721 if (!cm_id_priv)
1722 return -EINVAL;
1723
1724 spin_lock_irqsave(&cm_id_priv->lock, flags);
1725 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
1726 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1727 goto out;
1728 }
1729
34816ad9 1730 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1731 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1732 if (!ret)
1733 list_add_tail(&work->list, &cm_id_priv->work_list);
1734 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1735
1736 if (ret)
1737 cm_process_work(cm_id_priv, work);
1738 else
1739 cm_deref_id(cm_id_priv);
1740 return 0;
1741out:
1742 cm_deref_id(cm_id_priv);
1743 return -EINVAL;
1744}
1745
1746static int cm_rtu_handler(struct cm_work *work)
1747{
1748 struct cm_id_private *cm_id_priv;
1749 struct cm_rtu_msg *rtu_msg;
1750 unsigned long flags;
1751 int ret;
1752
1753 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1754 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1755 rtu_msg->local_comm_id);
1756 if (!cm_id_priv)
1757 return -EINVAL;
1758
1759 work->cm_event.private_data = &rtu_msg->private_data;
1760
1761 spin_lock_irqsave(&cm_id_priv->lock, flags);
1762 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1763 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
1764 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1765 goto out;
1766 }
1767 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1768
34816ad9 1769 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1770 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1771 if (!ret)
1772 list_add_tail(&work->list, &cm_id_priv->work_list);
1773 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1774
1775 if (ret)
1776 cm_process_work(cm_id_priv, work);
1777 else
1778 cm_deref_id(cm_id_priv);
1779 return 0;
1780out:
1781 cm_deref_id(cm_id_priv);
1782 return -EINVAL;
1783}
1784
1785static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1786 struct cm_id_private *cm_id_priv,
1787 const void *private_data,
1788 u8 private_data_len)
1789{
1790 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1791 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1792 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1793 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1794 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1795
1796 if (private_data && private_data_len)
1797 memcpy(dreq_msg->private_data, private_data, private_data_len);
1798}
1799
1800int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1801 const void *private_data,
1802 u8 private_data_len)
1803{
1804 struct cm_id_private *cm_id_priv;
1805 struct ib_mad_send_buf *msg;
a977049d
HR		 1806 unsigned long flags;
1807 int ret;
1808
1809 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1810 return -EINVAL;
1811
1812 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1813 spin_lock_irqsave(&cm_id_priv->lock, flags);
1814 if (cm_id->state != IB_CM_ESTABLISHED) {
1815 ret = -EINVAL;
1816 goto out;
1817 }
1818
1819 ret = cm_alloc_msg(cm_id_priv, &msg);
1820 if (ret) {
1821 cm_enter_timewait(cm_id_priv);
1822 goto out;
1823 }
1824
1825 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
1826 private_data, private_data_len);
34816ad9 1827 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1828 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
1829
34816ad9 1830 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1831 if (ret) {
1832 cm_enter_timewait(cm_id_priv);
1833 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1834 cm_free_msg(msg);
1835 return ret;
1836 }
1837
1838 cm_id->state = IB_CM_DREQ_SENT;
1839 cm_id_priv->msg = msg;
1840out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1841 return ret;
1842}
1843EXPORT_SYMBOL(ib_send_cm_dreq);
1844
1845static void cm_format_drep(struct cm_drep_msg *drep_msg,
1846 struct cm_id_private *cm_id_priv,
1847 const void *private_data,
1848 u8 private_data_len)
1849{
1850 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
1851 drep_msg->local_comm_id = cm_id_priv->id.local_id;
1852 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
1853
1854 if (private_data && private_data_len)
1855 memcpy(drep_msg->private_data, private_data, private_data_len);
1856}
1857
1858int ib_send_cm_drep(struct ib_cm_id *cm_id,
1859 const void *private_data,
1860 u8 private_data_len)
1861{
1862 struct cm_id_private *cm_id_priv;
1863 struct ib_mad_send_buf *msg;
a977049d
HR		 1864 unsigned long flags;
1865 void *data;
1866 int ret;
1867
1868 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
1869 return -EINVAL;
1870
1871 data = cm_copy_private_data(private_data, private_data_len);
1872 if (IS_ERR(data))
1873 return PTR_ERR(data);
1874
1875 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1876 spin_lock_irqsave(&cm_id_priv->lock, flags);
1877 if (cm_id->state != IB_CM_DREQ_RCVD) {
1878 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1879 kfree(data);
1880 return -EINVAL;
1881 }
1882
1883 cm_set_private_data(cm_id_priv, data, private_data_len);
1884 cm_enter_timewait(cm_id_priv);
1885
1886 ret = cm_alloc_msg(cm_id_priv, &msg);
1887 if (ret)
1888 goto out;
1889
1890 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1891 private_data, private_data_len);
1892
34816ad9 1893 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1894 if (ret) {
1895 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1896 cm_free_msg(msg);
1897 return ret;
1898 }
1899
1900out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1901 return ret;
1902}
1903EXPORT_SYMBOL(ib_send_cm_drep);
1904
82a9c16a
SH		 1905static int cm_issue_drep(struct cm_port *port,
1906 struct ib_mad_recv_wc *mad_recv_wc)
1907{
1908 struct ib_mad_send_buf *msg = NULL;
1909 struct cm_dreq_msg *dreq_msg;
1910 struct cm_drep_msg *drep_msg;
1911 int ret;
1912
1913 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1914 if (ret)
1915 return ret;
1916
1917 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
1918 drep_msg = (struct cm_drep_msg *) msg->mad;
1919
1920 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
1921 drep_msg->remote_comm_id = dreq_msg->local_comm_id;
1922 drep_msg->local_comm_id = dreq_msg->remote_comm_id;
1923
1924 ret = ib_post_send_mad(msg, NULL);
1925 if (ret)
1926 cm_free_msg(msg);
1927
1928 return ret;
1929}
1930
a977049d
HR		 1931static int cm_dreq_handler(struct cm_work *work)
1932{
1933 struct cm_id_private *cm_id_priv;
1934 struct cm_dreq_msg *dreq_msg;
1935 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1936 unsigned long flags;
1937 int ret;
1938
1939 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
1940 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
1941 dreq_msg->local_comm_id);
82a9c16a
SH		 1942 if (!cm_id_priv) {
1943 cm_issue_drep(work->port, work->mad_recv_wc);
a977049d 1944 return -EINVAL;
82a9c16a 1945 }
a977049d
HR		 1946
1947 work->cm_event.private_data = &dreq_msg->private_data;
1948
1949 spin_lock_irqsave(&cm_id_priv->lock, flags);
1950 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
1951 goto unlock;
1952
1953 switch (cm_id_priv->id.state) {
1954 case IB_CM_REP_SENT:
1955 case IB_CM_DREQ_SENT:
34816ad9 1956 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1957 break;
1958 case IB_CM_ESTABLISHED:
1959 case IB_CM_MRA_REP_RCVD:
1960 break;
1961 case IB_CM_TIMEWAIT:
1962 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
1963 goto unlock;
1964
1965 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
1966 cm_id_priv->private_data,
1967 cm_id_priv->private_data_len);
1968 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1969
34816ad9 1970 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 1971 cm_free_msg(msg);
1972 goto deref;
1973 default:
1974 goto unlock;
1975 }
1976 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
1977 cm_id_priv->tid = dreq_msg->hdr.tid;
1978 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1979 if (!ret)
1980 list_add_tail(&work->list, &cm_id_priv->work_list);
1981 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1982
1983 if (ret)
1984 cm_process_work(cm_id_priv, work);
1985 else
1986 cm_deref_id(cm_id_priv);
1987 return 0;
1988
1989unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1990deref: cm_deref_id(cm_id_priv);
1991 return -EINVAL;
1992}
1993
1994static int cm_drep_handler(struct cm_work *work)
1995{
1996 struct cm_id_private *cm_id_priv;
1997 struct cm_drep_msg *drep_msg;
1998 unsigned long flags;
1999 int ret;
2000
2001 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
2002 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
2003 drep_msg->local_comm_id);
2004 if (!cm_id_priv)
2005 return -EINVAL;
2006
2007 work->cm_event.private_data = &drep_msg->private_data;
2008
2009 spin_lock_irqsave(&cm_id_priv->lock, flags);
2010 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2011 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
2012 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2013 goto out;
2014 }
2015 cm_enter_timewait(cm_id_priv);
2016
34816ad9 2017 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2018 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2019 if (!ret)
2020 list_add_tail(&work->list, &cm_id_priv->work_list);
2021 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2022
2023 if (ret)
2024 cm_process_work(cm_id_priv, work);
2025 else
2026 cm_deref_id(cm_id_priv);
2027 return 0;
2028out:
2029 cm_deref_id(cm_id_priv);
2030 return -EINVAL;
2031}
2032
2033int ib_send_cm_rej(struct ib_cm_id *cm_id,
2034 enum ib_cm_rej_reason reason,
2035 void *ari,
2036 u8 ari_length,
2037 const void *private_data,
2038 u8 private_data_len)
2039{
2040 struct cm_id_private *cm_id_priv;
2041 struct ib_mad_send_buf *msg;
a977049d
HR		 2042 unsigned long flags;
2043 int ret;
2044
2045 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2046 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2047 return -EINVAL;
2048
2049 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2050
2051 spin_lock_irqsave(&cm_id_priv->lock, flags);
2052 switch (cm_id->state) {
2053 case IB_CM_REQ_SENT:
2054 case IB_CM_MRA_REQ_RCVD:
2055 case IB_CM_REQ_RCVD:
2056 case IB_CM_MRA_REQ_SENT:
2057 case IB_CM_REP_RCVD:
2058 case IB_CM_MRA_REP_SENT:
2059 ret = cm_alloc_msg(cm_id_priv, &msg);
2060 if (!ret)
2061 cm_format_rej((struct cm_rej_msg *) msg->mad,
2062 cm_id_priv, reason, ari, ari_length,
2063 private_data, private_data_len);
2064
2065 cm_reset_to_idle(cm_id_priv);
2066 break;
2067 case IB_CM_REP_SENT:
2068 case IB_CM_MRA_REP_RCVD:
2069 ret = cm_alloc_msg(cm_id_priv, &msg);
2070 if (!ret)
2071 cm_format_rej((struct cm_rej_msg *) msg->mad,
2072 cm_id_priv, reason, ari, ari_length,
2073 private_data, private_data_len);
2074
2075 cm_enter_timewait(cm_id_priv);
2076 break;
2077 default:
2078 ret = -EINVAL;
2079 goto out;
2080 }
2081
2082 if (ret)
2083 goto out;
2084
34816ad9 2085 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2086 if (ret)
2087 cm_free_msg(msg);
2088
2089out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2090 return ret;
2091}
2092EXPORT_SYMBOL(ib_send_cm_rej);
2093
2094static void cm_format_rej_event(struct cm_work *work)
2095{
2096 struct cm_rej_msg *rej_msg;
2097 struct ib_cm_rej_event_param *param;
2098
2099 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2100 param = &work->cm_event.param.rej_rcvd;
2101 param->ari = rej_msg->ari;
2102 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 2103 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 2104 work->cm_event.private_data = &rej_msg->private_data;
2105}
2106
2107static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2108{
2109 struct cm_timewait_info *timewait_info;
2110 struct cm_id_private *cm_id_priv;
2111 unsigned long flags;
97f52eb4 2112 __be32 remote_id;
a977049d
HR		 2113
2114 remote_id = rej_msg->local_comm_id;
2115
97f52eb4 2116 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
a977049d 2117 spin_lock_irqsave(&cm.lock, flags);
97f52eb4 2118 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 2119 remote_id);
2120 if (!timewait_info) {
2121 spin_unlock_irqrestore(&cm.lock, flags);
2122 return NULL;
2123 }
f06d2653
SH		 2124 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2125 (timewait_info->work.local_id ^
2126 cm.random_id_operand));
a977049d
HR		 2127 if (cm_id_priv) {
2128 if (cm_id_priv->id.remote_id == remote_id)
2129 atomic_inc(&cm_id_priv->refcount);
2130 else
2131 cm_id_priv = NULL;
2132 }
2133 spin_unlock_irqrestore(&cm.lock, flags);
2134 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2135 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2136 else
2137 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2138
2139 return cm_id_priv;
2140}
2141
2142static int cm_rej_handler(struct cm_work *work)
2143{
2144 struct cm_id_private *cm_id_priv;
2145 struct cm_rej_msg *rej_msg;
2146 unsigned long flags;
2147 int ret;
2148
2149 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2150 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2151 if (!cm_id_priv)
2152 return -EINVAL;
2153
2154 cm_format_rej_event(work);
2155
2156 spin_lock_irqsave(&cm_id_priv->lock, flags);
2157 switch (cm_id_priv->id.state) {
2158 case IB_CM_REQ_SENT:
2159 case IB_CM_MRA_REQ_RCVD:
2160 case IB_CM_REP_SENT:
2161 case IB_CM_MRA_REP_RCVD:
34816ad9 2162 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2163 /* fall through */
2164 case IB_CM_REQ_RCVD:
2165 case IB_CM_MRA_REQ_SENT:
97f52eb4 2166 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2167 cm_enter_timewait(cm_id_priv);
2168 else
2169 cm_reset_to_idle(cm_id_priv);
2170 break;
2171 case IB_CM_DREQ_SENT:
34816ad9 2172 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2173 /* fall through */
2174 case IB_CM_REP_RCVD:
2175 case IB_CM_MRA_REP_SENT:
2176 case IB_CM_ESTABLISHED:
2177 cm_enter_timewait(cm_id_priv);
2178 break;
2179 default:
2180 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2181 ret = -EINVAL;
2182 goto out;
2183 }
2184
2185 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2186 if (!ret)
2187 list_add_tail(&work->list, &cm_id_priv->work_list);
2188 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2189
2190 if (ret)
2191 cm_process_work(cm_id_priv, work);
2192 else
2193 cm_deref_id(cm_id_priv);
2194 return 0;
2195out:
2196 cm_deref_id(cm_id_priv);
2197 return -EINVAL;
2198}
2199
2200int ib_send_cm_mra(struct ib_cm_id *cm_id,
2201 u8 service_timeout,
2202 const void *private_data,
2203 u8 private_data_len)
2204{
2205 struct cm_id_private *cm_id_priv;
2206 struct ib_mad_send_buf *msg;
a977049d
HR		 2207 void *data;
2208 unsigned long flags;
2209 int ret;
2210
2211 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2212 return -EINVAL;
2213
2214 data = cm_copy_private_data(private_data, private_data_len);
2215 if (IS_ERR(data))
2216 return PTR_ERR(data);
2217
2218 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2219
2220 spin_lock_irqsave(&cm_id_priv->lock, flags);
2221 switch(cm_id_priv->id.state) {
2222 case IB_CM_REQ_RCVD:
2223 ret = cm_alloc_msg(cm_id_priv, &msg);
2224 if (ret)
2225 goto error1;
2226
2227 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2228 CM_MSG_RESPONSE_REQ, service_timeout,
2229 private_data, private_data_len);
34816ad9 2230 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2231 if (ret)
2232 goto error2;
2233 cm_id->state = IB_CM_MRA_REQ_SENT;
2234 break;
2235 case IB_CM_REP_RCVD:
2236 ret = cm_alloc_msg(cm_id_priv, &msg);
2237 if (ret)
2238 goto error1;
2239
2240 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2241 CM_MSG_RESPONSE_REP, service_timeout,
2242 private_data, private_data_len);
34816ad9 2243 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2244 if (ret)
2245 goto error2;
2246 cm_id->state = IB_CM_MRA_REP_SENT;
2247 break;
2248 case IB_CM_ESTABLISHED:
2249 ret = cm_alloc_msg(cm_id_priv, &msg);
2250 if (ret)
2251 goto error1;
2252
2253 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2254 CM_MSG_RESPONSE_OTHER, service_timeout,
2255 private_data, private_data_len);
34816ad9 2256 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2257 if (ret)
2258 goto error2;
2259 cm_id->lap_state = IB_CM_MRA_LAP_SENT;
2260 break;
2261 default:
2262 ret = -EINVAL;
2263 goto error1;
2264 }
2265 cm_id_priv->service_timeout = service_timeout;
2266 cm_set_private_data(cm_id_priv, data, private_data_len);
2267 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2268 return 0;
2269
2270error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2271 kfree(data);
2272 return ret;
2273
2274error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2275 kfree(data);
2276 cm_free_msg(msg);
2277 return ret;
2278}
2279EXPORT_SYMBOL(ib_send_cm_mra);
2280
2281static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2282{
2283 switch (cm_mra_get_msg_mraed(mra_msg)) {
2284 case CM_MSG_RESPONSE_REQ:
2285 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2286 case CM_MSG_RESPONSE_REP:
2287 case CM_MSG_RESPONSE_OTHER:
2288 return cm_acquire_id(mra_msg->remote_comm_id,
2289 mra_msg->local_comm_id);
2290 default:
2291 return NULL;
2292 }
2293}
2294
2295static int cm_mra_handler(struct cm_work *work)
2296{
2297 struct cm_id_private *cm_id_priv;
2298 struct cm_mra_msg *mra_msg;
2299 unsigned long flags;
2300 int timeout, ret;
2301
2302 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2303 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2304 if (!cm_id_priv)
2305 return -EINVAL;
2306
2307 work->cm_event.private_data = &mra_msg->private_data;
2308 work->cm_event.param.mra_rcvd.service_timeout =
2309 cm_mra_get_service_timeout(mra_msg);
2310 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
2311 cm_convert_to_ms(cm_id_priv->av.packet_life_time);
2312
2313 spin_lock_irqsave(&cm_id_priv->lock, flags);
2314 switch (cm_id_priv->id.state) {
2315 case IB_CM_REQ_SENT:
2316 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2317 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2318 cm_id_priv->msg, timeout))
a977049d
HR		 2319 goto out;
2320 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2321 break;
2322 case IB_CM_REP_SENT:
2323 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2324 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2325 cm_id_priv->msg, timeout))
a977049d
HR		 2326 goto out;
2327 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2328 break;
2329 case IB_CM_ESTABLISHED:
2330 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2331 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2332 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2333 cm_id_priv->msg, timeout))
a977049d
HR		 2334 goto out;
2335 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2336 break;
2337 default:
2338 goto out;
2339 }
2340
2341 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2342 cm_id_priv->id.state;
2343 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2344 if (!ret)
2345 list_add_tail(&work->list, &cm_id_priv->work_list);
2346 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2347
2348 if (ret)
2349 cm_process_work(cm_id_priv, work);
2350 else
2351 cm_deref_id(cm_id_priv);
2352 return 0;
2353out:
2354 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2355 cm_deref_id(cm_id_priv);
2356 return -EINVAL;
2357}
2358
2359static void cm_format_lap(struct cm_lap_msg *lap_msg,
2360 struct cm_id_private *cm_id_priv,
2361 struct ib_sa_path_rec *alternate_path,
2362 const void *private_data,
2363 u8 private_data_len)
2364{
2365 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2366 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2367 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2368 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2369 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2370 /* todo: need remote CM response timeout */
2371 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2372 lap_msg->alt_local_lid = alternate_path->slid;
2373 lap_msg->alt_remote_lid = alternate_path->dlid;
2374 lap_msg->alt_local_gid = alternate_path->sgid;
2375 lap_msg->alt_remote_gid = alternate_path->dgid;
2376 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2377 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2378 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2379 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2380 cm_lap_set_sl(lap_msg, alternate_path->sl);
2381 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2382 cm_lap_set_local_ack_timeout(lap_msg,
2383 min(31, alternate_path->packet_life_time + 1));
2384
2385 if (private_data && private_data_len)
2386 memcpy(lap_msg->private_data, private_data, private_data_len);
2387}
2388
2389int ib_send_cm_lap(struct ib_cm_id *cm_id,
2390 struct ib_sa_path_rec *alternate_path,
2391 const void *private_data,
2392 u8 private_data_len)
2393{
2394 struct cm_id_private *cm_id_priv;
2395 struct ib_mad_send_buf *msg;
a977049d
HR		 2396 unsigned long flags;
2397 int ret;
2398
2399 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2400 return -EINVAL;
2401
2402 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2403 spin_lock_irqsave(&cm_id_priv->lock, flags);
2404 if (cm_id->state != IB_CM_ESTABLISHED ||
2405 cm_id->lap_state != IB_CM_LAP_IDLE) {
2406 ret = -EINVAL;
2407 goto out;
2408 }
2409
2410 ret = cm_alloc_msg(cm_id_priv, &msg);
2411 if (ret)
2412 goto out;
2413
2414 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2415 alternate_path, private_data, private_data_len);
34816ad9 2416 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2417 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2418
34816ad9 2419 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2420 if (ret) {
2421 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2422 cm_free_msg(msg);
2423 return ret;
2424 }
2425
2426 cm_id->lap_state = IB_CM_LAP_SENT;
2427 cm_id_priv->msg = msg;
2428
2429out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2430 return ret;
2431}
2432EXPORT_SYMBOL(ib_send_cm_lap);
2433
2434static void cm_format_path_from_lap(struct ib_sa_path_rec *path,
2435 struct cm_lap_msg *lap_msg)
2436{
2437 memset(path, 0, sizeof *path);
2438 path->dgid = lap_msg->alt_local_gid;
2439 path->sgid = lap_msg->alt_remote_gid;
2440 path->dlid = lap_msg->alt_local_lid;
2441 path->slid = lap_msg->alt_remote_lid;
2442 path->flow_label = cm_lap_get_flow_label(lap_msg);
2443 path->hop_limit = lap_msg->alt_hop_limit;
2444 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2445 path->reversible = 1;
2446 /* pkey is same as in REQ */
2447 path->sl = cm_lap_get_sl(lap_msg);
2448 path->mtu_selector = IB_SA_EQ;
2449 /* mtu is same as in REQ */
2450 path->rate_selector = IB_SA_EQ;
2451 path->rate = cm_lap_get_packet_rate(lap_msg);
2452 path->packet_life_time_selector = IB_SA_EQ;
2453 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2454 path->packet_life_time -= (path->packet_life_time > 0);
2455}
2456
2457static int cm_lap_handler(struct cm_work *work)
2458{
2459 struct cm_id_private *cm_id_priv;
2460 struct cm_lap_msg *lap_msg;
2461 struct ib_cm_lap_event_param *param;
2462 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2463 unsigned long flags;
2464 int ret;
2465
2466 /* todo: verify LAP request and send reject APR if invalid. */
2467 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2468 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2469 lap_msg->local_comm_id);
2470 if (!cm_id_priv)
2471 return -EINVAL;
2472
2473 param = &work->cm_event.param.lap_rcvd;
2474 param->alternate_path = &work->path[0];
2475 cm_format_path_from_lap(param->alternate_path, lap_msg);
2476 work->cm_event.private_data = &lap_msg->private_data;
2477
2478 spin_lock_irqsave(&cm_id_priv->lock, flags);
2479 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2480 goto unlock;
2481
2482 switch (cm_id_priv->id.lap_state) {
2483 case IB_CM_LAP_IDLE:
2484 break;
2485 case IB_CM_MRA_LAP_SENT:
2486 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2487 goto unlock;
2488
2489 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2490 CM_MSG_RESPONSE_OTHER,
2491 cm_id_priv->service_timeout,
2492 cm_id_priv->private_data,
2493 cm_id_priv->private_data_len);
2494 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2495
34816ad9 2496 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2497 cm_free_msg(msg);
2498 goto deref;
2499 default:
2500 goto unlock;
2501 }
2502
2503 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2504 cm_id_priv->tid = lap_msg->hdr.tid;
2505 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2506 if (!ret)
2507 list_add_tail(&work->list, &cm_id_priv->work_list);
2508 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2509
2510 if (ret)
2511 cm_process_work(cm_id_priv, work);
2512 else
2513 cm_deref_id(cm_id_priv);
2514 return 0;
2515
2516unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2517deref: cm_deref_id(cm_id_priv);
2518 return -EINVAL;
2519}
2520
2521static void cm_format_apr(struct cm_apr_msg *apr_msg,
2522 struct cm_id_private *cm_id_priv,
2523 enum ib_cm_apr_status status,
2524 void *info,
2525 u8 info_length,
2526 const void *private_data,
2527 u8 private_data_len)
2528{
2529 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2530 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2531 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2532 apr_msg->ap_status = (u8) status;
2533
2534 if (info && info_length) {
2535 apr_msg->info_length = info_length;
2536 memcpy(apr_msg->info, info, info_length);
2537 }
2538
2539 if (private_data && private_data_len)
2540 memcpy(apr_msg->private_data, private_data, private_data_len);
2541}
2542
2543int ib_send_cm_apr(struct ib_cm_id *cm_id,
2544 enum ib_cm_apr_status status,
2545 void *info,
2546 u8 info_length,
2547 const void *private_data,
2548 u8 private_data_len)
2549{
2550 struct cm_id_private *cm_id_priv;
2551 struct ib_mad_send_buf *msg;
a977049d
HR		 2552 unsigned long flags;
2553 int ret;
2554
2555 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2556 (info && info_length > IB_CM_APR_INFO_LENGTH))
2557 return -EINVAL;
2558
2559 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2560 spin_lock_irqsave(&cm_id_priv->lock, flags);
2561 if (cm_id->state != IB_CM_ESTABLISHED ||
2562 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2563 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2564 ret = -EINVAL;
2565 goto out;
2566 }
2567
2568 ret = cm_alloc_msg(cm_id_priv, &msg);
2569 if (ret)
2570 goto out;
2571
2572 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2573 info, info_length, private_data, private_data_len);
34816ad9 2574 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2575 if (ret) {
2576 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2577 cm_free_msg(msg);
2578 return ret;
2579 }
2580
2581 cm_id->lap_state = IB_CM_LAP_IDLE;
2582out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2583 return ret;
2584}
2585EXPORT_SYMBOL(ib_send_cm_apr);
2586
2587static int cm_apr_handler(struct cm_work *work)
2588{
2589 struct cm_id_private *cm_id_priv;
2590 struct cm_apr_msg *apr_msg;
2591 unsigned long flags;
2592 int ret;
2593
2594 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2595 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2596 apr_msg->local_comm_id);
2597 if (!cm_id_priv)
2598 return -EINVAL; /* Unmatched reply. */
2599
2600 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2601 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2602 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2603 work->cm_event.private_data = &apr_msg->private_data;
2604
2605 spin_lock_irqsave(&cm_id_priv->lock, flags);
2606 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2607 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2608 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
2609 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2610 goto out;
2611 }
2612 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
34816ad9 2613 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2614 cm_id_priv->msg = NULL;
2615
2616 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2617 if (!ret)
2618 list_add_tail(&work->list, &cm_id_priv->work_list);
2619 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2620
2621 if (ret)
2622 cm_process_work(cm_id_priv, work);
2623 else
2624 cm_deref_id(cm_id_priv);
2625 return 0;
2626out:
2627 cm_deref_id(cm_id_priv);
2628 return -EINVAL;
2629}
2630
2631static int cm_timewait_handler(struct cm_work *work)
2632{
2633 struct cm_timewait_info *timewait_info;
2634 struct cm_id_private *cm_id_priv;
a977049d
HR		 2635 int ret;
2636
2637 timewait_info = (struct cm_timewait_info *)work;
8575329d
SH		 2638 spin_lock_irq(&cm.lock);
2639 list_del(&timewait_info->list);
2640 spin_unlock_irq(&cm.lock);
a977049d
HR		 2641
2642 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2643 timewait_info->work.remote_id);
2644 if (!cm_id_priv)
2645 return -EINVAL;
2646
8575329d 2647 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2648 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2649 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
8575329d 2650 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2651 goto out;
2652 }
2653 cm_id_priv->id.state = IB_CM_IDLE;
2654 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2655 if (!ret)
2656 list_add_tail(&work->list, &cm_id_priv->work_list);
8575329d 2657 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2658
2659 if (ret)
2660 cm_process_work(cm_id_priv, work);
2661 else
2662 cm_deref_id(cm_id_priv);
2663 return 0;
2664out:
2665 cm_deref_id(cm_id_priv);
2666 return -EINVAL;
2667}
2668
2669static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2670 struct cm_id_private *cm_id_priv,
2671 struct ib_cm_sidr_req_param *param)
2672{
2673 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2674 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2675 sidr_req_msg->request_id = cm_id_priv->id.local_id;
75af9088 2676 sidr_req_msg->pkey = cpu_to_be16(param->path->pkey);
a977049d
HR		 2677 sidr_req_msg->service_id = param->service_id;
2678
2679 if (param->private_data && param->private_data_len)
2680 memcpy(sidr_req_msg->private_data, param->private_data,
2681 param->private_data_len);
2682}
2683
2684int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2685 struct ib_cm_sidr_req_param *param)
2686{
2687 struct cm_id_private *cm_id_priv;
2688 struct ib_mad_send_buf *msg;
a977049d
HR		 2689 unsigned long flags;
2690 int ret;
2691
2692 if (!param->path || (param->private_data &&
2693 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2694 return -EINVAL;
2695
2696 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2697 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2698 if (ret)
2699 goto out;
2700
2701 cm_id->service_id = param->service_id;
97f52eb4 2702 cm_id->service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2703 cm_id_priv->timeout_ms = param->timeout_ms;
2704 cm_id_priv->max_cm_retries = param->max_cm_retries;
2705 ret = cm_alloc_msg(cm_id_priv, &msg);
2706 if (ret)
2707 goto out;
2708
2709 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2710 param);
34816ad9 2711 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2712 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2713
2714 spin_lock_irqsave(&cm_id_priv->lock, flags);
2715 if (cm_id->state == IB_CM_IDLE)
34816ad9 2716 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2717 else
2718 ret = -EINVAL;
2719
2720 if (ret) {
2721 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2722 cm_free_msg(msg);
2723 goto out;
2724 }
2725 cm_id->state = IB_CM_SIDR_REQ_SENT;
2726 cm_id_priv->msg = msg;
2727 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2728out:
2729 return ret;
2730}
2731EXPORT_SYMBOL(ib_send_cm_sidr_req);
2732
2733static void cm_format_sidr_req_event(struct cm_work *work,
2734 struct ib_cm_id *listen_id)
2735{
2736 struct cm_sidr_req_msg *sidr_req_msg;
2737 struct ib_cm_sidr_req_event_param *param;
2738
2739 sidr_req_msg = (struct cm_sidr_req_msg *)
2740 work->mad_recv_wc->recv_buf.mad;
2741 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 2742 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 2743 param->listen_id = listen_id;
a977049d
HR		 2744 param->port = work->port->port_num;
2745 work->cm_event.private_data = &sidr_req_msg->private_data;
2746}
2747
2748static int cm_sidr_req_handler(struct cm_work *work)
2749{
2750 struct ib_cm_id *cm_id;
2751 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2752 struct cm_sidr_req_msg *sidr_req_msg;
2753 struct ib_wc *wc;
2754 unsigned long flags;
2755
07d357d0 2756 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
a977049d
HR		 2757 if (IS_ERR(cm_id))
2758 return PTR_ERR(cm_id);
2759 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2760
2761 /* Record SGID/SLID and request ID for lookup. */
2762 sidr_req_msg = (struct cm_sidr_req_msg *)
2763 work->mad_recv_wc->recv_buf.mad;
2764 wc = work->mad_recv_wc->wc;
97f52eb4 2765 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 2766 cm_id_priv->av.dgid.global.interface_id = 0;
2767 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 2768 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 2769 &cm_id_priv->av);
2770 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
2771 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
2772 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2773 atomic_inc(&cm_id_priv->work_count);
2774
2775 spin_lock_irqsave(&cm.lock, flags);
2776 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
2777 if (cur_cm_id_priv) {
2778 spin_unlock_irqrestore(&cm.lock, flags);
2779 goto out; /* Duplicate message. */
2780 }
07d357d0 2781 cur_cm_id_priv = cm_find_listen(cm_id->device,
6e61d04f
SH		 2782 sidr_req_msg->service_id,
2783 sidr_req_msg->private_data);
a977049d
HR		 2784 if (!cur_cm_id_priv) {
2785 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2786 spin_unlock_irqrestore(&cm.lock, flags);
2787 /* todo: reply with no match */
2788 goto out; /* No match. */
2789 }
2790 atomic_inc(&cur_cm_id_priv->refcount);
2791 spin_unlock_irqrestore(&cm.lock, flags);
2792
2793 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
2794 cm_id_priv->id.context = cur_cm_id_priv->id.context;
2795 cm_id_priv->id.service_id = sidr_req_msg->service_id;
97f52eb4 2796 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL);
a977049d
HR		 2797
2798 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
2799 cm_process_work(cm_id_priv, work);
2800 cm_deref_id(cur_cm_id_priv);
2801 return 0;
2802out:
2803 ib_destroy_cm_id(&cm_id_priv->id);
2804 return -EINVAL;
2805}
2806
2807static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
2808 struct cm_id_private *cm_id_priv,
2809 struct ib_cm_sidr_rep_param *param)
2810{
2811 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
2812 cm_id_priv->tid);
2813 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
2814 sidr_rep_msg->status = param->status;
2815 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
2816 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
2817 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
2818
2819 if (param->info && param->info_length)
2820 memcpy(sidr_rep_msg->info, param->info, param->info_length);
2821
2822 if (param->private_data && param->private_data_len)
2823 memcpy(sidr_rep_msg->private_data, param->private_data,
2824 param->private_data_len);
2825}
2826
2827int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
2828 struct ib_cm_sidr_rep_param *param)
2829{
2830 struct cm_id_private *cm_id_priv;
2831 struct ib_mad_send_buf *msg;
a977049d
HR		 2832 unsigned long flags;
2833 int ret;
2834
2835 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
2836 (param->private_data &&
2837 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
2838 return -EINVAL;
2839
2840 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2841 spin_lock_irqsave(&cm_id_priv->lock, flags);
2842 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
2843 ret = -EINVAL;
2844 goto error;
2845 }
2846
2847 ret = cm_alloc_msg(cm_id_priv, &msg);
2848 if (ret)
2849 goto error;
2850
2851 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
2852 param);
34816ad9 2853 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2854 if (ret) {
2855 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2856 cm_free_msg(msg);
2857 return ret;
2858 }
2859 cm_id->state = IB_CM_IDLE;
2860 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2861
2862 spin_lock_irqsave(&cm.lock, flags);
2863 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
2864 spin_unlock_irqrestore(&cm.lock, flags);
2865 return 0;
2866
2867error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2868 return ret;
2869}
2870EXPORT_SYMBOL(ib_send_cm_sidr_rep);
2871
2872static void cm_format_sidr_rep_event(struct cm_work *work)
2873{
2874 struct cm_sidr_rep_msg *sidr_rep_msg;
2875 struct ib_cm_sidr_rep_event_param *param;
2876
2877 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2878 work->mad_recv_wc->recv_buf.mad;
2879 param = &work->cm_event.param.sidr_rep_rcvd;
2880 param->status = sidr_rep_msg->status;
2881 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
2882 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
2883 param->info = &sidr_rep_msg->info;
2884 param->info_len = sidr_rep_msg->info_length;
2885 work->cm_event.private_data = &sidr_rep_msg->private_data;
2886}
2887
2888static int cm_sidr_rep_handler(struct cm_work *work)
2889{
2890 struct cm_sidr_rep_msg *sidr_rep_msg;
2891 struct cm_id_private *cm_id_priv;
2892 unsigned long flags;
2893
2894 sidr_rep_msg = (struct cm_sidr_rep_msg *)
2895 work->mad_recv_wc->recv_buf.mad;
2896 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
2897 if (!cm_id_priv)
2898 return -EINVAL; /* Unmatched reply. */
2899
2900 spin_lock_irqsave(&cm_id_priv->lock, flags);
2901 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
2902 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2903 goto out;
2904 }
2905 cm_id_priv->id.state = IB_CM_IDLE;
34816ad9 2906 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2907 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2908
2909 cm_format_sidr_rep_event(work);
2910 cm_process_work(cm_id_priv, work);
2911 return 0;
2912out:
2913 cm_deref_id(cm_id_priv);
2914 return -EINVAL;
2915}
2916
2917static void cm_process_send_error(struct ib_mad_send_buf *msg,
2918 enum ib_wc_status wc_status)
2919{
2920 struct cm_id_private *cm_id_priv;
2921 struct ib_cm_event cm_event;
2922 enum ib_cm_state state;
2923 unsigned long flags;
2924 int ret;
2925
2926 memset(&cm_event, 0, sizeof cm_event);
2927 cm_id_priv = msg->context[0];
2928
2929 /* Discard old sends or ones without a response. */
2930 spin_lock_irqsave(&cm_id_priv->lock, flags);
2931 state = (enum ib_cm_state) (unsigned long) msg->context[1];
2932 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
2933 goto discard;
2934
2935 switch (state) {
2936 case IB_CM_REQ_SENT:
2937 case IB_CM_MRA_REQ_RCVD:
2938 cm_reset_to_idle(cm_id_priv);
2939 cm_event.event = IB_CM_REQ_ERROR;
2940 break;
2941 case IB_CM_REP_SENT:
2942 case IB_CM_MRA_REP_RCVD:
2943 cm_reset_to_idle(cm_id_priv);
2944 cm_event.event = IB_CM_REP_ERROR;
2945 break;
2946 case IB_CM_DREQ_SENT:
2947 cm_enter_timewait(cm_id_priv);
2948 cm_event.event = IB_CM_DREQ_ERROR;
2949 break;
2950 case IB_CM_SIDR_REQ_SENT:
2951 cm_id_priv->id.state = IB_CM_IDLE;
2952 cm_event.event = IB_CM_SIDR_REQ_ERROR;
2953 break;
2954 default:
2955 goto discard;
2956 }
2957 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2958 cm_event.param.send_status = wc_status;
2959
2960 /* No other events can occur on the cm_id at this point. */
2961 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
2962 cm_free_msg(msg);
2963 if (ret)
2964 ib_destroy_cm_id(&cm_id_priv->id);
2965 return;
2966discard:
2967 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2968 cm_free_msg(msg);
2969}
2970
2971static void cm_send_handler(struct ib_mad_agent *mad_agent,
2972 struct ib_mad_send_wc *mad_send_wc)
2973{
34816ad9 2974 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
a977049d
HR		 2975
2976 switch (mad_send_wc->status) {
2977 case IB_WC_SUCCESS:
2978 case IB_WC_WR_FLUSH_ERR:
2979 cm_free_msg(msg);
2980 break;
2981 default:
2982 if (msg->context[0] && msg->context[1])
2983 cm_process_send_error(msg, mad_send_wc->status);
2984 else
2985 cm_free_msg(msg);
2986 break;
2987 }
2988}
2989
2990static void cm_work_handler(void *data)
2991{
2992 struct cm_work *work = data;
2993 int ret;
2994
2995 switch (work->cm_event.event) {
2996 case IB_CM_REQ_RECEIVED:
2997 ret = cm_req_handler(work);
2998 break;
2999 case IB_CM_MRA_RECEIVED:
3000 ret = cm_mra_handler(work);
3001 break;
3002 case IB_CM_REJ_RECEIVED:
3003 ret = cm_rej_handler(work);
3004 break;
3005 case IB_CM_REP_RECEIVED:
3006 ret = cm_rep_handler(work);
3007 break;
3008 case IB_CM_RTU_RECEIVED:
3009 ret = cm_rtu_handler(work);
3010 break;
3011 case IB_CM_USER_ESTABLISHED:
3012 ret = cm_establish_handler(work);
3013 break;
3014 case IB_CM_DREQ_RECEIVED:
3015 ret = cm_dreq_handler(work);
3016 break;
3017 case IB_CM_DREP_RECEIVED:
3018 ret = cm_drep_handler(work);
3019 break;
3020 case IB_CM_SIDR_REQ_RECEIVED:
3021 ret = cm_sidr_req_handler(work);
3022 break;
3023 case IB_CM_SIDR_REP_RECEIVED:
3024 ret = cm_sidr_rep_handler(work);
3025 break;
3026 case IB_CM_LAP_RECEIVED:
3027 ret = cm_lap_handler(work);
3028 break;
3029 case IB_CM_APR_RECEIVED:
3030 ret = cm_apr_handler(work);
3031 break;
3032 case IB_CM_TIMEWAIT_EXIT:
3033 ret = cm_timewait_handler(work);
3034 break;
3035 default:
3036 ret = -EINVAL;
3037 break;
3038 }
3039 if (ret)
3040 cm_free_work(work);
3041}
3042
3043int ib_cm_establish(struct ib_cm_id *cm_id)
3044{
3045 struct cm_id_private *cm_id_priv;
3046 struct cm_work *work;
3047 unsigned long flags;
3048 int ret = 0;
3049
3050 work = kmalloc(sizeof *work, GFP_ATOMIC);
3051 if (!work)
3052 return -ENOMEM;
3053
3054 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3055 spin_lock_irqsave(&cm_id_priv->lock, flags);
3056 switch (cm_id->state)
3057 {
3058 case IB_CM_REP_SENT:
3059 case IB_CM_MRA_REP_RCVD:
3060 cm_id->state = IB_CM_ESTABLISHED;
3061 break;
3062 case IB_CM_ESTABLISHED:
3063 ret = -EISCONN;
3064 break;
3065 default:
3066 ret = -EINVAL;
3067 break;
3068 }
3069 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3070
3071 if (ret) {
3072 kfree(work);
3073 goto out;
3074 }
3075
3076 /*
3077 * The CM worker thread may try to destroy the cm_id before it
3078 * can execute this work item. To prevent potential deadlock,
3079 * we need to find the cm_id once we're in the context of the
3080 * worker thread, rather than holding a reference on it.
3081 */
3082 INIT_WORK(&work->work, cm_work_handler, work);
3083 work->local_id = cm_id->local_id;
3084 work->remote_id = cm_id->remote_id;
3085 work->mad_recv_wc = NULL;
3086 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3087 queue_work(cm.wq, &work->work);
3088out:
3089 return ret;
3090}
3091EXPORT_SYMBOL(ib_cm_establish);
3092
3093static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3094 struct ib_mad_recv_wc *mad_recv_wc)
3095{
3096 struct cm_work *work;
3097 enum ib_cm_event_type event;
3098 int paths = 0;
3099
3100 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3101 case CM_REQ_ATTR_ID:
3102 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3103 alt_local_lid != 0);
3104 event = IB_CM_REQ_RECEIVED;
3105 break;
3106 case CM_MRA_ATTR_ID:
3107 event = IB_CM_MRA_RECEIVED;
3108 break;
3109 case CM_REJ_ATTR_ID:
3110 event = IB_CM_REJ_RECEIVED;
3111 break;
3112 case CM_REP_ATTR_ID:
3113 event = IB_CM_REP_RECEIVED;
3114 break;
3115 case CM_RTU_ATTR_ID:
3116 event = IB_CM_RTU_RECEIVED;
3117 break;
3118 case CM_DREQ_ATTR_ID:
3119 event = IB_CM_DREQ_RECEIVED;
3120 break;
3121 case CM_DREP_ATTR_ID:
3122 event = IB_CM_DREP_RECEIVED;
3123 break;
3124 case CM_SIDR_REQ_ATTR_ID:
3125 event = IB_CM_SIDR_REQ_RECEIVED;
3126 break;
3127 case CM_SIDR_REP_ATTR_ID:
3128 event = IB_CM_SIDR_REP_RECEIVED;
3129 break;
3130 case CM_LAP_ATTR_ID:
3131 paths = 1;
3132 event = IB_CM_LAP_RECEIVED;
3133 break;
3134 case CM_APR_ATTR_ID:
3135 event = IB_CM_APR_RECEIVED;
3136 break;
3137 default:
3138 ib_free_recv_mad(mad_recv_wc);
3139 return;
3140 }
3141
3142 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3143 GFP_KERNEL);
3144 if (!work) {
3145 ib_free_recv_mad(mad_recv_wc);
3146 return;
3147 }
3148
3149 INIT_WORK(&work->work, cm_work_handler, work);
3150 work->cm_event.event = event;
3151 work->mad_recv_wc = mad_recv_wc;
3152 work->port = (struct cm_port *)mad_agent->context;
3153 queue_work(cm.wq, &work->work);
3154}
3155
3156static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3157 struct ib_qp_attr *qp_attr,
3158 int *qp_attr_mask)
3159{
3160 unsigned long flags;
3161 int ret;
3162
3163 spin_lock_irqsave(&cm_id_priv->lock, flags);
3164 switch (cm_id_priv->id.state) {
3165 case IB_CM_REQ_SENT:
3166 case IB_CM_MRA_REQ_RCVD:
3167 case IB_CM_REQ_RCVD:
3168 case IB_CM_MRA_REQ_SENT:
3169 case IB_CM_REP_RCVD:
3170 case IB_CM_MRA_REP_SENT:
3171 case IB_CM_REP_SENT:
3172 case IB_CM_MRA_REP_RCVD:
3173 case IB_CM_ESTABLISHED:
3174 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3175 IB_QP_PKEY_INDEX | IB_QP_PORT;
ae7971a7
SH		 3176 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE |
3177 IB_ACCESS_REMOTE_WRITE;
a977049d 3178 if (cm_id_priv->responder_resources)
c1f250c0
SH		 3179 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3180 IB_ACCESS_REMOTE_ATOMIC;
a977049d
HR		 3181 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3182 qp_attr->port_num = cm_id_priv->av.port->port_num;
3183 ret = 0;
3184 break;
3185 default:
3186 ret = -EINVAL;
3187 break;
3188 }
3189 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3190 return ret;
3191}
3192
3193static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3194 struct ib_qp_attr *qp_attr,
3195 int *qp_attr_mask)
3196{
3197 unsigned long flags;
3198 int ret;
3199
3200 spin_lock_irqsave(&cm_id_priv->lock, flags);
3201 switch (cm_id_priv->id.state) {
3202 case IB_CM_REQ_RCVD:
3203 case IB_CM_MRA_REQ_SENT:
3204 case IB_CM_REP_RCVD:
3205 case IB_CM_MRA_REP_SENT:
3206 case IB_CM_REP_SENT:
3207 case IB_CM_MRA_REP_RCVD:
3208 case IB_CM_ESTABLISHED:
3209 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 3210 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d
HR		 3211 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3212 qp_attr->path_mtu = cm_id_priv->path_mtu;
3213 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3214 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
ae7971a7
SH		 3215 if (cm_id_priv->qp_type == IB_QPT_RC) {
3216 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3217 IB_QP_MIN_RNR_TIMER;
3218 qp_attr->max_dest_rd_atomic =
3219 cm_id_priv->responder_resources;
3220 qp_attr->min_rnr_timer = 0;
3221 }
a977049d
HR		 3222 if (cm_id_priv->alt_av.ah_attr.dlid) {
3223 *qp_attr_mask |= IB_QP_ALT_PATH;
0d8fdfd7 3224 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
a977049d
HR		 3225 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3226 }
3227 ret = 0;
3228 break;
3229 default:
3230 ret = -EINVAL;
3231 break;
3232 }
3233 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3234 return ret;
3235}
3236
3237static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3238 struct ib_qp_attr *qp_attr,
3239 int *qp_attr_mask)
3240{
3241 unsigned long flags;
3242 int ret;
3243
3244 spin_lock_irqsave(&cm_id_priv->lock, flags);
3245 switch (cm_id_priv->id.state) {
3246 case IB_CM_REP_RCVD:
3247 case IB_CM_MRA_REP_SENT:
3248 case IB_CM_REP_SENT:
3249 case IB_CM_MRA_REP_RCVD:
3250 case IB_CM_ESTABLISHED:
ae7971a7 3251 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
a977049d 3252 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
ae7971a7
SH		 3253 if (cm_id_priv->qp_type == IB_QPT_RC) {
3254 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
3255 IB_QP_RNR_RETRY |
3256 IB_QP_MAX_QP_RD_ATOMIC;
3257 qp_attr->timeout = cm_id_priv->local_ack_timeout;
3258 qp_attr->retry_cnt = cm_id_priv->retry_count;
3259 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
3260 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3261 }
a977049d
HR		 3262 if (cm_id_priv->alt_av.ah_attr.dlid) {
3263 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3264 qp_attr->path_mig_state = IB_MIG_REARM;
3265 }
3266 ret = 0;
3267 break;
3268 default:
3269 ret = -EINVAL;
3270 break;
3271 }
3272 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3273 return ret;
3274}
3275
3276int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3277 struct ib_qp_attr *qp_attr,
3278 int *qp_attr_mask)
3279{
3280 struct cm_id_private *cm_id_priv;
3281 int ret;
3282
3283 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3284 switch (qp_attr->qp_state) {
3285 case IB_QPS_INIT:
3286 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3287 break;
3288 case IB_QPS_RTR:
3289 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3290 break;
3291 case IB_QPS_RTS:
3292 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3293 break;
3294 default:
3295 ret = -EINVAL;
3296 break;
3297 }
3298 return ret;
3299}
3300EXPORT_SYMBOL(ib_cm_init_qp_attr);
3301
a977049d
HR		 3302static void cm_add_one(struct ib_device *device)
3303{
3304 struct cm_device *cm_dev;
3305 struct cm_port *port;
3306 struct ib_mad_reg_req reg_req = {
3307 .mgmt_class = IB_MGMT_CLASS_CM,
3308 .mgmt_class_version = IB_CM_CLASS_VERSION
3309 };
3310 struct ib_port_modify port_modify = {
3311 .set_port_cap_mask = IB_PORT_CM_SUP
3312 };
3313 unsigned long flags;
3314 int ret;
3315 u8 i;
3316
07ebafba
TT		 3317 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
3318 return;
3319
a977049d
HR		 3320 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) *
3321 device->phys_port_cnt, GFP_KERNEL);
3322 if (!cm_dev)
3323 return;
3324
3325 cm_dev->device = device;
cf311cd4 3326 cm_dev->ca_guid = device->node_guid;
a977049d
HR		 3327
3328 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
3329 for (i = 1; i <= device->phys_port_cnt; i++) {
3330 port = &cm_dev->port[i-1];
3331 port->cm_dev = cm_dev;
3332 port->port_num = i;
3333 port->mad_agent = ib_register_mad_agent(device, i,
3334 IB_QPT_GSI,
3335 &reg_req,
3336 0,
3337 cm_send_handler,
3338 cm_recv_handler,
3339 port);
3340 if (IS_ERR(port->mad_agent))
cf311cd4 3341 goto error1;
a977049d
HR		 3342
3343 ret = ib_modify_port(device, i, 0, &port_modify);
3344 if (ret)
cf311cd4 3345 goto error2;
a977049d
HR		 3346 }
3347 ib_set_client_data(device, &cm_client, cm_dev);
3348
3349 write_lock_irqsave(&cm.device_lock, flags);
3350 list_add_tail(&cm_dev->list, &cm.device_list);
3351 write_unlock_irqrestore(&cm.device_lock, flags);
3352 return;
3353
a977049d 3354error2:
cf311cd4
SH		 3355 ib_unregister_mad_agent(port->mad_agent);
3356error1:
a977049d
HR		 3357 port_modify.set_port_cap_mask = 0;
3358 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3359 while (--i) {
3360 port = &cm_dev->port[i-1];
3361 ib_modify_port(device, port->port_num, 0, &port_modify);
3362 ib_unregister_mad_agent(port->mad_agent);
3363 }
a977049d
HR		 3364 kfree(cm_dev);
3365}
3366
3367static void cm_remove_one(struct ib_device *device)
3368{
3369 struct cm_device *cm_dev;
3370 struct cm_port *port;
3371 struct ib_port_modify port_modify = {
3372 .clr_port_cap_mask = IB_PORT_CM_SUP
3373 };
3374 unsigned long flags;
3375 int i;
3376
3377 cm_dev = ib_get_client_data(device, &cm_client);
3378 if (!cm_dev)
3379 return;
3380
3381 write_lock_irqsave(&cm.device_lock, flags);
3382 list_del(&cm_dev->list);
3383 write_unlock_irqrestore(&cm.device_lock, flags);
3384
3385 for (i = 1; i <= device->phys_port_cnt; i++) {
3386 port = &cm_dev->port[i-1];
3387 ib_modify_port(device, port->port_num, 0, &port_modify);
3388 ib_unregister_mad_agent(port->mad_agent);
3389 }
3390 kfree(cm_dev);
3391}
3392
3393static int __init ib_cm_init(void)
3394{
3395 int ret;
3396
3397 memset(&cm, 0, sizeof cm);
3398 INIT_LIST_HEAD(&cm.device_list);
3399 rwlock_init(&cm.device_lock);
3400 spin_lock_init(&cm.lock);
3401 cm.listen_service_table = RB_ROOT;
3402 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
3403 cm.remote_id_table = RB_ROOT;
3404 cm.remote_qp_table = RB_ROOT;
3405 cm.remote_sidr_table = RB_ROOT;
3406 idr_init(&cm.local_id_table);
f06d2653 3407 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
a977049d 3408 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
8575329d 3409 INIT_LIST_HEAD(&cm.timewait_list);
a977049d
HR		 3410
3411 cm.wq = create_workqueue("ib_cm");
3412 if (!cm.wq)
3413 return -ENOMEM;
3414
3415 ret = ib_register_client(&cm_client);
3416 if (ret)
3417 goto error;
3418
3419 return 0;
3420error:
3421 destroy_workqueue(cm.wq);
3422 return ret;
3423}
3424
3425static void __exit ib_cm_cleanup(void)
3426{
8575329d
SH		 3427 struct cm_timewait_info *timewait_info, *tmp;
3428
3429 spin_lock_irq(&cm.lock);
3430 list_for_each_entry(timewait_info, &cm.timewait_list, list)
3431 cancel_delayed_work(&timewait_info->work.work);
3432 spin_unlock_irq(&cm.lock);
3433
a977049d 3434 destroy_workqueue(cm.wq);
8575329d
SH		 3435
3436 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
3437 list_del(&timewait_info->list);
3438 kfree(timewait_info);
3439 }
3440
a977049d 3441 ib_unregister_client(&cm_client);
5d7edb3c 3442 idr_destroy(&cm.local_id_table);
a977049d
HR		 3443}
3444
3445module_init(ib_cm_init);
3446module_exit(ib_cm_cleanup);
3447
Linux kernel - Deliverables
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