projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'trace-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux...
[deliverable/linux.git] / drivers / infiniband / core / cm.c
CommitLineData
a977049d 1/*
9af57b7a 2 * Copyright (c) 2004-2007 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.
a977049d 34 */
1b52fa98
SH		 35
36#include <linux/completion.h>
a977049d 37#include <linux/dma-mapping.h>
9af57b7a 38#include <linux/device.h>
e4dd23d7 39#include <linux/module.h>
a977049d
HR		 40#include <linux/err.h>
41#include <linux/idr.h>
42#include <linux/interrupt.h>
f06d2653 43#include <linux/random.h>
a977049d
HR		 44#include <linux/rbtree.h>
45#include <linux/spinlock.h>
5a0e3ad6 46#include <linux/slab.h>
9af57b7a 47#include <linux/sysfs.h>
a977049d 48#include <linux/workqueue.h>
110cf374 49#include <linux/kdev_t.h>
dd5f03be 50#include <linux/etherdevice.h>
a977049d 51
a4d61e84
RD		 52#include <rdma/ib_cache.h>
53#include <rdma/ib_cm.h>
a977049d
HR		 54#include "cm_msgs.h"
55
56MODULE_AUTHOR("Sean Hefty");
57MODULE_DESCRIPTION("InfiniBand CM");
58MODULE_LICENSE("Dual BSD/GPL");
59
60static void cm_add_one(struct ib_device *device);
7c1eb45a 61static void cm_remove_one(struct ib_device *device, void *client_data);
a977049d
HR		 62
63static struct ib_client cm_client = {
64 .name = "cm",
65 .add = cm_add_one,
66 .remove = cm_remove_one
67};
68
69static struct ib_cm {
70 spinlock_t lock;
71 struct list_head device_list;
72 rwlock_t device_lock;
73 struct rb_root listen_service_table;
74 u64 listen_service_id;
75 /* struct rb_root peer_service_table; todo: fix peer to peer */
76 struct rb_root remote_qp_table;
77 struct rb_root remote_id_table;
78 struct rb_root remote_sidr_table;
79 struct idr local_id_table;
f06d2653 80 __be32 random_id_operand;
8575329d 81 struct list_head timewait_list;
a977049d
HR		 82 struct workqueue_struct *wq;
83} cm;
84
9af57b7a
SH		 85/* Counter indexes ordered by attribute ID */
86enum {
87 CM_REQ_COUNTER,
88 CM_MRA_COUNTER,
89 CM_REJ_COUNTER,
90 CM_REP_COUNTER,
91 CM_RTU_COUNTER,
92 CM_DREQ_COUNTER,
93 CM_DREP_COUNTER,
94 CM_SIDR_REQ_COUNTER,
95 CM_SIDR_REP_COUNTER,
96 CM_LAP_COUNTER,
97 CM_APR_COUNTER,
98 CM_ATTR_COUNT,
99 CM_ATTR_ID_OFFSET = 0x0010,
100};
101
102enum {
103 CM_XMIT,
104 CM_XMIT_RETRIES,
105 CM_RECV,
106 CM_RECV_DUPLICATES,
107 CM_COUNTER_GROUPS
108};
109
110static char const counter_group_names[CM_COUNTER_GROUPS]
111 [sizeof("cm_rx_duplicates")] = {
112 "cm_tx_msgs", "cm_tx_retries",
113 "cm_rx_msgs", "cm_rx_duplicates"
114};
115
116struct cm_counter_group {
117 struct kobject obj;
118 atomic_long_t counter[CM_ATTR_COUNT];
119};
120
121struct cm_counter_attribute {
122 struct attribute attr;
123 int index;
124};
125
126#define CM_COUNTER_ATTR(_name, _index) \
127struct cm_counter_attribute cm_##_name##_counter_attr = { \
01e8ef11 128 .attr = { .name = __stringify(_name), .mode = 0444 }, \
9af57b7a
SH		 129 .index = _index \
130}
131
132static CM_COUNTER_ATTR(req, CM_REQ_COUNTER);
133static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER);
134static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER);
135static CM_COUNTER_ATTR(rep, CM_REP_COUNTER);
136static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER);
137static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER);
138static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER);
139static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER);
140static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER);
141static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER);
142static CM_COUNTER_ATTR(apr, CM_APR_COUNTER);
143
144static struct attribute *cm_counter_default_attrs[] = {
145 &cm_req_counter_attr.attr,
146 &cm_mra_counter_attr.attr,
147 &cm_rej_counter_attr.attr,
148 &cm_rep_counter_attr.attr,
149 &cm_rtu_counter_attr.attr,
150 &cm_dreq_counter_attr.attr,
151 &cm_drep_counter_attr.attr,
152 &cm_sidr_req_counter_attr.attr,
153 &cm_sidr_rep_counter_attr.attr,
154 &cm_lap_counter_attr.attr,
155 &cm_apr_counter_attr.attr,
156 NULL
157};
158
a977049d
HR		 159struct cm_port {
160 struct cm_device *cm_dev;
161 struct ib_mad_agent *mad_agent;
9af57b7a 162 struct kobject port_obj;
a977049d 163 u8 port_num;
9af57b7a 164 struct cm_counter_group counter_group[CM_COUNTER_GROUPS];
a977049d
HR		 165};
166
167struct cm_device {
168 struct list_head list;
d4c4196f 169 struct ib_device *ib_device;
110cf374 170 struct device *device;
1d846126 171 u8 ack_delay;
be4b4993 172 int going_down;
9af57b7a 173 struct cm_port *port[0];
a977049d
HR		 174};
175
176struct cm_av {
177 struct cm_port *port;
178 union ib_gid dgid;
179 struct ib_ah_attr ah_attr;
180 u16 pkey_index;
1d846126 181 u8 timeout;
a977049d
HR		 182};
183
184struct cm_work {
c4028958 185 struct delayed_work work;
a977049d
HR		 186 struct list_head list;
187 struct cm_port *port;
188 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
97f52eb4
SH		 189 __be32 local_id; /* Established / timewait */
190 __be32 remote_id;
a977049d
HR		 191 struct ib_cm_event cm_event;
192 struct ib_sa_path_rec path[0];
193};
194
195struct cm_timewait_info {
196 struct cm_work work; /* Must be first. */
8575329d 197 struct list_head list;
a977049d
HR		 198 struct rb_node remote_qp_node;
199 struct rb_node remote_id_node;
97f52eb4
SH		 200 __be64 remote_ca_guid;
201 __be32 remote_qpn;
a977049d
HR		 202 u8 inserted_remote_qp;
203 u8 inserted_remote_id;
204};
205
206struct cm_id_private {
207 struct ib_cm_id id;
208
209 struct rb_node service_node;
210 struct rb_node sidr_id_node;
87fd1a11 211 spinlock_t lock; /* Do not acquire inside cm.lock */
1b52fa98 212 struct completion comp;
a977049d 213 atomic_t refcount;
067b171b
HE		 214 /* Number of clients sharing this ib_cm_id. Only valid for listeners.
215 * Protected by the cm.lock spinlock. */
216 int listen_sharecount;
a977049d
HR		 217
218 struct ib_mad_send_buf *msg;
219 struct cm_timewait_info *timewait_info;
220 /* todo: use alternate port on send failure */
221 struct cm_av av;
222 struct cm_av alt_av;
223
224 void *private_data;
97f52eb4
SH		 225 __be64 tid;
226 __be32 local_qpn;
227 __be32 remote_qpn;
ae7971a7 228 enum ib_qp_type qp_type;
97f52eb4
SH		 229 __be32 sq_psn;
230 __be32 rq_psn;
a977049d
HR		 231 int timeout_ms;
232 enum ib_mtu path_mtu;
e1444b5a 233 __be16 pkey;
a977049d
HR		 234 u8 private_data_len;
235 u8 max_cm_retries;
236 u8 peer_to_peer;
237 u8 responder_resources;
238 u8 initiator_depth;
a977049d
HR		 239 u8 retry_count;
240 u8 rnr_retry_count;
241 u8 service_timeout;
1d846126 242 u8 target_ack_delay;
a977049d
HR		 243
244 struct list_head work_list;
245 atomic_t work_count;
246};
247
c4028958 248static void cm_work_handler(struct work_struct *work);
a977049d
HR		 249
250static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
251{
252 if (atomic_dec_and_test(&cm_id_priv->refcount))
1b52fa98 253 complete(&cm_id_priv->comp);
a977049d
HR		 254}
255
256static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
257 struct ib_mad_send_buf **msg)
258{
259 struct ib_mad_agent *mad_agent;
260 struct ib_mad_send_buf *m;
261 struct ib_ah *ah;
262
263 mad_agent = cm_id_priv->av.port->mad_agent;
264 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
265 if (IS_ERR(ah))
266 return PTR_ERR(ah);
267
3cd96564 268 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
354ba39c 269 cm_id_priv->av.pkey_index,
34816ad9 270 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
da2dfaa3
IW		 271 GFP_ATOMIC,
272 IB_MGMT_BASE_VERSION);
a977049d
HR		 273 if (IS_ERR(m)) {
274 ib_destroy_ah(ah);
275 return PTR_ERR(m);
276 }
277
278 /* Timeout set by caller if response is expected. */
34816ad9
SH		 279 m->ah = ah;
280 m->retries = cm_id_priv->max_cm_retries;
a977049d
HR		 281
282 atomic_inc(&cm_id_priv->refcount);
283 m->context[0] = cm_id_priv;
284 *msg = m;
285 return 0;
286}
287
288static int cm_alloc_response_msg(struct cm_port *port,
289 struct ib_mad_recv_wc *mad_recv_wc,
290 struct ib_mad_send_buf **msg)
291{
292 struct ib_mad_send_buf *m;
293 struct ib_ah *ah;
294
295 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
296 mad_recv_wc->recv_buf.grh, port->port_num);
297 if (IS_ERR(ah))
298 return PTR_ERR(ah);
299
300 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
34816ad9 301 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
da2dfaa3
IW		 302 GFP_ATOMIC,
303 IB_MGMT_BASE_VERSION);
a977049d
HR		 304 if (IS_ERR(m)) {
305 ib_destroy_ah(ah);
306 return PTR_ERR(m);
307 }
34816ad9 308 m->ah = ah;
a977049d
HR		 309 *msg = m;
310 return 0;
311}
312
313static void cm_free_msg(struct ib_mad_send_buf *msg)
314{
34816ad9 315 ib_destroy_ah(msg->ah);
a977049d
HR		 316 if (msg->context[0])
317 cm_deref_id(msg->context[0]);
318 ib_free_send_mad(msg);
319}
320
321static void * cm_copy_private_data(const void *private_data,
322 u8 private_data_len)
323{
324 void *data;
325
326 if (!private_data || !private_data_len)
327 return NULL;
328
bed8bdfd 329 data = kmemdup(private_data, private_data_len, GFP_KERNEL);
a977049d
HR		 330 if (!data)
331 return ERR_PTR(-ENOMEM);
332
a977049d
HR		 333 return data;
334}
335
336static void cm_set_private_data(struct cm_id_private *cm_id_priv,
337 void *private_data, u8 private_data_len)
338{
339 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
340 kfree(cm_id_priv->private_data);
341
342 cm_id_priv->private_data = private_data;
343 cm_id_priv->private_data_len = private_data_len;
344}
345
ca222c6b
SH		 346static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
347 struct ib_grh *grh, struct cm_av *av)
a977049d
HR		 348{
349 av->port = port;
350 av->pkey_index = wc->pkey_index;
d4c4196f 351 ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc,
ca222c6b 352 grh, &av->ah_attr);
a977049d
HR		 353}
354
355static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
356{
357 struct cm_device *cm_dev;
358 struct cm_port *port = NULL;
359 unsigned long flags;
360 int ret;
361 u8 p;
c2c6ff13 362 struct net_device *ndev = ib_get_ndev_from_path(path);
a977049d
HR		 363
364 read_lock_irqsave(&cm.device_lock, flags);
365 list_for_each_entry(cm_dev, &cm.device_list, list) {
d4c4196f 366 if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid,
c2c6ff13 367 ndev, &p, NULL)) {
9af57b7a 368 port = cm_dev->port[p-1];
a977049d
HR		 369 break;
370 }
371 }
372 read_unlock_irqrestore(&cm.device_lock, flags);
373
c2c6ff13
MB		 374 if (ndev)
375 dev_put(ndev);
376
a977049d
HR		 377 if (!port)
378 return -EINVAL;
379
d4c4196f 380 ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num,
a977049d
HR		 381 be16_to_cpu(path->pkey), &av->pkey_index);
382 if (ret)
383 return ret;
384
385 av->port = port;
d4c4196f 386 ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path,
ca222c6b 387 &av->ah_attr);
1d846126 388 av->timeout = path->packet_life_time + 1;
dd5f03be 389
a977049d
HR		 390 return 0;
391}
392
393static int cm_alloc_id(struct cm_id_private *cm_id_priv)
394{
395 unsigned long flags;
3b069c5d 396 int id;
a977049d 397
3b069c5d
TH		 398 idr_preload(GFP_KERNEL);
399 spin_lock_irqsave(&cm.lock, flags);
400
ab626d1a 401 id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT);
3b069c5d
TH		 402
403 spin_unlock_irqrestore(&cm.lock, flags);
404 idr_preload_end();
f06d2653 405
1b90c137 406 cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
3b069c5d 407 return id < 0 ? id : 0;
a977049d
HR		 408}
409
97f52eb4 410static void cm_free_id(__be32 local_id)
a977049d 411{
24be6e81 412 spin_lock_irq(&cm.lock);
f06d2653
SH		 413 idr_remove(&cm.local_id_table,
414 (__force int) (local_id ^ cm.random_id_operand));
24be6e81 415 spin_unlock_irq(&cm.lock);
a977049d
HR		 416}
417
97f52eb4 418static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 419{
420 struct cm_id_private *cm_id_priv;
421
f06d2653
SH		 422 cm_id_priv = idr_find(&cm.local_id_table,
423 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 424 if (cm_id_priv) {
425 if (cm_id_priv->id.remote_id == remote_id)
426 atomic_inc(&cm_id_priv->refcount);
427 else
428 cm_id_priv = NULL;
429 }
430
431 return cm_id_priv;
432}
433
97f52eb4 434static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 435{
436 struct cm_id_private *cm_id_priv;
a977049d 437
24be6e81 438 spin_lock_irq(&cm.lock);
a977049d 439 cm_id_priv = cm_get_id(local_id, remote_id);
24be6e81 440 spin_unlock_irq(&cm.lock);
a977049d
HR		 441
442 return cm_id_priv;
443}
444
a88f4888
RD		 445/*
446 * Trivial helpers to strip endian annotation and compare; the
447 * endianness doesn't actually matter since we just need a stable
448 * order for the RB tree.
449 */
450static int be32_lt(__be32 a, __be32 b)
451{
452 return (__force u32) a < (__force u32) b;
453}
454
455static int be32_gt(__be32 a, __be32 b)
456{
457 return (__force u32) a > (__force u32) b;
458}
459
460static int be64_lt(__be64 a, __be64 b)
461{
462 return (__force u64) a < (__force u64) b;
463}
464
465static int be64_gt(__be64 a, __be64 b)
466{
467 return (__force u64) a > (__force u64) b;
468}
469
a977049d
HR		 470static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
471{
472 struct rb_node **link = &cm.listen_service_table.rb_node;
473 struct rb_node *parent = NULL;
474 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 475 __be64 service_id = cm_id_priv->id.service_id;
476 __be64 service_mask = cm_id_priv->id.service_mask;
a977049d
HR		 477
478 while (*link) {
479 parent = *link;
480 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
481 service_node);
482 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0 483 (service_mask & cur_cm_id_priv->id.service_id) &&
73fec7fd 484 (cm_id_priv->id.device == cur_cm_id_priv->id.device))
07d357d0
SH		 485 return cur_cm_id_priv;
486
487 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
488 link = &(*link)->rb_left;
489 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
490 link = &(*link)->rb_right;
a88f4888 491 else if (be64_lt(service_id, cur_cm_id_priv->id.service_id))
a977049d 492 link = &(*link)->rb_left;
a88f4888 493 else if (be64_gt(service_id, cur_cm_id_priv->id.service_id))
6e61d04f 494 link = &(*link)->rb_right;
a977049d
HR		 495 else
496 link = &(*link)->rb_right;
497 }
498 rb_link_node(&cm_id_priv->service_node, parent, link);
499 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
500 return NULL;
501}
502
07d357d0 503static struct cm_id_private * cm_find_listen(struct ib_device *device,
73fec7fd 504 __be64 service_id)
a977049d
HR		 505{
506 struct rb_node *node = cm.listen_service_table.rb_node;
507 struct cm_id_private *cm_id_priv;
508
509 while (node) {
510 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
511 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0 512 cm_id_priv->id.service_id &&
73fec7fd 513 (cm_id_priv->id.device == device))
a977049d 514 return cm_id_priv;
07d357d0
SH		 515
516 if (device < cm_id_priv->id.device)
517 node = node->rb_left;
518 else if (device > cm_id_priv->id.device)
519 node = node->rb_right;
a88f4888 520 else if (be64_lt(service_id, cm_id_priv->id.service_id))
a977049d 521 node = node->rb_left;
a88f4888 522 else if (be64_gt(service_id, cm_id_priv->id.service_id))
6e61d04f 523 node = node->rb_right;
a977049d
HR		 524 else
525 node = node->rb_right;
526 }
527 return NULL;
528}
529
530static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
531 *timewait_info)
532{
533 struct rb_node **link = &cm.remote_id_table.rb_node;
534 struct rb_node *parent = NULL;
535 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 536 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
537 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 538
539 while (*link) {
540 parent = *link;
541 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
542 remote_id_node);
a88f4888 543 if (be32_lt(remote_id, cur_timewait_info->work.remote_id))
a977049d 544 link = &(*link)->rb_left;
a88f4888 545 else if (be32_gt(remote_id, cur_timewait_info->work.remote_id))
a977049d 546 link = &(*link)->rb_right;
a88f4888 547 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d 548 link = &(*link)->rb_left;
a88f4888 549 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d
HR		 550 link = &(*link)->rb_right;
551 else
552 return cur_timewait_info;
553 }
554 timewait_info->inserted_remote_id = 1;
555 rb_link_node(&timewait_info->remote_id_node, parent, link);
556 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
557 return NULL;
558}
559
97f52eb4
SH		 560static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
561 __be32 remote_id)
a977049d
HR		 562{
563 struct rb_node *node = cm.remote_id_table.rb_node;
564 struct cm_timewait_info *timewait_info;
565
566 while (node) {
567 timewait_info = rb_entry(node, struct cm_timewait_info,
568 remote_id_node);
a88f4888 569 if (be32_lt(remote_id, timewait_info->work.remote_id))
a977049d 570 node = node->rb_left;
a88f4888 571 else if (be32_gt(remote_id, timewait_info->work.remote_id))
a977049d 572 node = node->rb_right;
a88f4888 573 else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid))
a977049d 574 node = node->rb_left;
a88f4888 575 else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid))
a977049d
HR		 576 node = node->rb_right;
577 else
578 return timewait_info;
579 }
580 return NULL;
581}
582
583static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
584 *timewait_info)
585{
586 struct rb_node **link = &cm.remote_qp_table.rb_node;
587 struct rb_node *parent = NULL;
588 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 589 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
590 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 591
592 while (*link) {
593 parent = *link;
594 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
595 remote_qp_node);
a88f4888 596 if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn))
a977049d 597 link = &(*link)->rb_left;
a88f4888 598 else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn))
a977049d 599 link = &(*link)->rb_right;
a88f4888 600 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d 601 link = &(*link)->rb_left;
a88f4888 602 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d
HR		 603 link = &(*link)->rb_right;
604 else
605 return cur_timewait_info;
606 }
607 timewait_info->inserted_remote_qp = 1;
608 rb_link_node(&timewait_info->remote_qp_node, parent, link);
609 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
610 return NULL;
611}
612
613static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
614 *cm_id_priv)
615{
616 struct rb_node **link = &cm.remote_sidr_table.rb_node;
617 struct rb_node *parent = NULL;
618 struct cm_id_private *cur_cm_id_priv;
619 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 620 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 621
622 while (*link) {
623 parent = *link;
624 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
625 sidr_id_node);
a88f4888 626 if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id))
a977049d 627 link = &(*link)->rb_left;
a88f4888 628 else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id))
a977049d
HR		 629 link = &(*link)->rb_right;
630 else {
631 int cmp;
632 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
633 sizeof *port_gid);
634 if (cmp < 0)
635 link = &(*link)->rb_left;
636 else if (cmp > 0)
637 link = &(*link)->rb_right;
638 else
639 return cur_cm_id_priv;
640 }
641 }
642 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
643 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
644 return NULL;
645}
646
647static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
648 enum ib_cm_sidr_status status)
649{
650 struct ib_cm_sidr_rep_param param;
651
652 memset(&param, 0, sizeof param);
653 param.status = status;
654 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
655}
656
07d357d0
SH		 657struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
658 ib_cm_handler cm_handler,
a977049d
HR		 659 void *context)
660{
661 struct cm_id_private *cm_id_priv;
662 int ret;
663
de6eb66b 664 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
a977049d
HR		 665 if (!cm_id_priv)
666 return ERR_PTR(-ENOMEM);
667
a977049d 668 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 669 cm_id_priv->id.device = device;
a977049d
HR		 670 cm_id_priv->id.cm_handler = cm_handler;
671 cm_id_priv->id.context = context;
354ba39c 672 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 673 ret = cm_alloc_id(cm_id_priv);
674 if (ret)
675 goto error;
676
677 spin_lock_init(&cm_id_priv->lock);
1b52fa98 678 init_completion(&cm_id_priv->comp);
a977049d
HR		 679 INIT_LIST_HEAD(&cm_id_priv->work_list);
680 atomic_set(&cm_id_priv->work_count, -1);
681 atomic_set(&cm_id_priv->refcount, 1);
682 return &cm_id_priv->id;
683
684error:
685 kfree(cm_id_priv);
686 return ERR_PTR(-ENOMEM);
687}
688EXPORT_SYMBOL(ib_create_cm_id);
689
690static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
691{
692 struct cm_work *work;
693
694 if (list_empty(&cm_id_priv->work_list))
695 return NULL;
696
697 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
698 list_del(&work->list);
699 return work;
700}
701
702static void cm_free_work(struct cm_work *work)
703{
704 if (work->mad_recv_wc)
705 ib_free_recv_mad(work->mad_recv_wc);
706 kfree(work);
707}
708
709static inline int cm_convert_to_ms(int iba_time)
710{
711 /* approximate conversion to ms from 4.096us x 2^iba_time */
712 return 1 << max(iba_time - 8, 0);
713}
714
1d846126
SH		 715/*
716 * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
717 * Because of how ack_timeout is stored, adding one doubles the timeout.
718 * To avoid large timeouts, select the max(ack_delay, life_time + 1), and
719 * increment it (round up) only if the other is within 50%.
720 */
721static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time)
722{
723 int ack_timeout = packet_life_time + 1;
724
725 if (ack_timeout >= ca_ack_delay)
726 ack_timeout += (ca_ack_delay >= (ack_timeout - 1));
727 else
728 ack_timeout = ca_ack_delay +
729 (ack_timeout >= (ca_ack_delay - 1));
730
731 return min(31, ack_timeout);
732}
733
a977049d
HR		 734static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
735{
a977049d
HR		 736 if (timewait_info->inserted_remote_id) {
737 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
738 timewait_info->inserted_remote_id = 0;
739 }
740
741 if (timewait_info->inserted_remote_qp) {
742 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
743 timewait_info->inserted_remote_qp = 0;
744 }
a977049d
HR		 745}
746
97f52eb4 747static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 748{
749 struct cm_timewait_info *timewait_info;
750
de6eb66b 751 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
a977049d
HR		 752 if (!timewait_info)
753 return ERR_PTR(-ENOMEM);
a977049d
HR		 754
755 timewait_info->work.local_id = local_id;
c4028958 756 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
a977049d
HR		 757 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
758 return timewait_info;
759}
760
761static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
762{
763 int wait_time;
8575329d 764 unsigned long flags;
be4b4993
ES		 765 struct cm_device *cm_dev;
766
767 cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client);
768 if (!cm_dev)
769 return;
a977049d 770
8575329d 771 spin_lock_irqsave(&cm.lock, flags);
a70d0590 772 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d
SH		 773 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
774 spin_unlock_irqrestore(&cm.lock, flags);
a70d0590 775
a977049d
HR		 776 /*
777 * The cm_id could be destroyed by the user before we exit timewait.
778 * To protect against this, we search for the cm_id after exiting
779 * timewait before notifying the user that we've exited timewait.
780 */
781 cm_id_priv->id.state = IB_CM_TIMEWAIT;
1d846126 782 wait_time = cm_convert_to_ms(cm_id_priv->av.timeout);
be4b4993
ES		 783
784 /* Check if the device started its remove_one */
785 spin_lock_irq(&cm.lock);
786 if (!cm_dev->going_down)
787 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
788 msecs_to_jiffies(wait_time));
789 spin_unlock_irq(&cm.lock);
790
a977049d
HR		 791 cm_id_priv->timewait_info = NULL;
792}
793
794static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
795{
8575329d
SH		 796 unsigned long flags;
797
a977049d
HR		 798 cm_id_priv->id.state = IB_CM_IDLE;
799 if (cm_id_priv->timewait_info) {
8575329d 800 spin_lock_irqsave(&cm.lock, flags);
a977049d 801 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d 802 spin_unlock_irqrestore(&cm.lock, flags);
a977049d
HR		 803 kfree(cm_id_priv->timewait_info);
804 cm_id_priv->timewait_info = NULL;
805 }
806}
807
04c33543 808static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
a977049d
HR		 809{
810 struct cm_id_private *cm_id_priv;
811 struct cm_work *work;
a977049d
HR		 812
813 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
814retest:
24be6e81 815 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 816 switch (cm_id->state) {
817 case IB_CM_LISTEN:
24be6e81 818 spin_unlock_irq(&cm_id_priv->lock);
067b171b 819
24be6e81 820 spin_lock_irq(&cm.lock);
067b171b
HE		 821 if (--cm_id_priv->listen_sharecount > 0) {
822 /* The id is still shared. */
823 cm_deref_id(cm_id_priv);
824 spin_unlock_irq(&cm.lock);
825 return;
826 }
a977049d 827 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
24be6e81 828 spin_unlock_irq(&cm.lock);
a977049d
HR		 829 break;
830 case IB_CM_SIDR_REQ_SENT:
831 cm_id->state = IB_CM_IDLE;
34816ad9 832 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
24be6e81 833 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 834 break;
835 case IB_CM_SIDR_REQ_RCVD:
24be6e81 836 spin_unlock_irq(&cm_id_priv->lock);
a977049d 837 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
0ca81a28
DT		 838 spin_lock_irq(&cm.lock);
839 if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node))
840 rb_erase(&cm_id_priv->sidr_id_node,
841 &cm.remote_sidr_table);
842 spin_unlock_irq(&cm.lock);
a977049d
HR		 843 break;
844 case IB_CM_REQ_SENT:
c29ed5a4 845 case IB_CM_MRA_REQ_RCVD:
227eca83 846 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
24be6e81 847 spin_unlock_irq(&cm_id_priv->lock);
227eca83 848 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
e971b8cd
SH		 849 &cm_id_priv->id.device->node_guid,
850 sizeof cm_id_priv->id.device->node_guid,
227eca83
SH		 851 NULL, 0);
852 break;
04c33543
MT		 853 case IB_CM_REQ_RCVD:
854 if (err == -ENOMEM) {
855 /* Do not reject to allow future retries. */
856 cm_reset_to_idle(cm_id_priv);
24be6e81 857 spin_unlock_irq(&cm_id_priv->lock);
04c33543 858 } else {
24be6e81 859 spin_unlock_irq(&cm_id_priv->lock);
04c33543
MT		 860 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
861 NULL, 0, NULL, 0);
862 }
863 break;
a977049d
HR		 864 case IB_CM_REP_SENT:
865 case IB_CM_MRA_REP_RCVD:
34816ad9 866 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 867 /* Fall through */
a977049d
HR		 868 case IB_CM_MRA_REQ_SENT:
869 case IB_CM_REP_RCVD:
870 case IB_CM_MRA_REP_SENT:
24be6e81 871 spin_unlock_irq(&cm_id_priv->lock);
227eca83
SH		 872 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
873 NULL, 0, NULL, 0);
a977049d
HR		 874 break;
875 case IB_CM_ESTABLISHED:
24be6e81 876 spin_unlock_irq(&cm_id_priv->lock);
2622e18e
SH		 877 if (cm_id_priv->qp_type == IB_QPT_XRC_TGT)
878 break;
a977049d
HR		 879 ib_send_cm_dreq(cm_id, NULL, 0);
880 goto retest;
881 case IB_CM_DREQ_SENT:
34816ad9 882 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 883 cm_enter_timewait(cm_id_priv);
24be6e81 884 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 885 break;
886 case IB_CM_DREQ_RCVD:
24be6e81 887 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 888 ib_send_cm_drep(cm_id, NULL, 0);
889 break;
890 default:
24be6e81 891 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 892 break;
893 }
894
895 cm_free_id(cm_id->local_id);
1b52fa98
SH		 896 cm_deref_id(cm_id_priv);
897 wait_for_completion(&cm_id_priv->comp);
a977049d
HR		 898 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
899 cm_free_work(work);
6e61d04f 900 kfree(cm_id_priv->private_data);
a977049d
HR		 901 kfree(cm_id_priv);
902}
04c33543
MT		 903
904void ib_destroy_cm_id(struct ib_cm_id *cm_id)
905{
906 cm_destroy_id(cm_id, 0);
907}
a977049d
HR		 908EXPORT_SYMBOL(ib_destroy_cm_id);
909
067b171b
HE		 910/**
911 * __ib_cm_listen - Initiates listening on the specified service ID for
912 * connection and service ID resolution requests.
913 * @cm_id: Connection identifier associated with the listen request.
914 * @service_id: Service identifier matched against incoming connection
915 * and service ID resolution requests. The service ID should be specified
916 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
917 * assign a service ID to the caller.
918 * @service_mask: Mask applied to service ID used to listen across a
919 * range of service IDs. If set to 0, the service ID is matched
920 * exactly. This parameter is ignored if %service_id is set to
921 * IB_CM_ASSIGN_SERVICE_ID.
067b171b
HE		 922 */
923static int __ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id,
73fec7fd 924 __be64 service_mask)
a977049d
HR		 925{
926 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
a977049d
HR		 927 int ret = 0;
928
9c3da099 929 service_mask = service_mask ? service_mask : ~cpu_to_be64(0);
a977049d
HR		 930 service_id &= service_mask;
931 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
932 (service_id != IB_CM_ASSIGN_SERVICE_ID))
933 return -EINVAL;
934
935 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
6e61d04f
SH		 936 if (cm_id->state != IB_CM_IDLE)
937 return -EINVAL;
938
a977049d 939 cm_id->state = IB_CM_LISTEN;
067b171b 940 ++cm_id_priv->listen_sharecount;
73fec7fd 941
a977049d 942 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
97f52eb4 943 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
9c3da099 944 cm_id->service_mask = ~cpu_to_be64(0);
a977049d
HR		 945 } else {
946 cm_id->service_id = service_id;
947 cm_id->service_mask = service_mask;
948 }
949 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
a977049d
HR		 950
951 if (cur_cm_id_priv) {
952 cm_id->state = IB_CM_IDLE;
067b171b 953 --cm_id_priv->listen_sharecount;
a977049d
HR		 954 ret = -EBUSY;
955 }
956 return ret;
957}
067b171b 958
73fec7fd 959int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask)
067b171b 960{
73fec7fd
HE		 961 unsigned long flags;
962 int ret;
963
964 spin_lock_irqsave(&cm.lock, flags);
965 ret = __ib_cm_listen(cm_id, service_id, service_mask);
966 spin_unlock_irqrestore(&cm.lock, flags);
967
968 return ret;
067b171b 969}
a977049d
HR		 970EXPORT_SYMBOL(ib_cm_listen);
971
067b171b
HE		 972/**
973 * Create a new listening ib_cm_id and listen on the given service ID.
974 *
975 * If there's an existing ID listening on that same device and service ID,
976 * return it.
977 *
978 * @device: Device associated with the cm_id. All related communication will
979 * be associated with the specified device.
980 * @cm_handler: Callback invoked to notify the user of CM events.
981 * @service_id: Service identifier matched against incoming connection
982 * and service ID resolution requests. The service ID should be specified
983 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
984 * assign a service ID to the caller.
985 *
986 * Callers should call ib_destroy_cm_id when done with the listener ID.
987 */
988struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
989 ib_cm_handler cm_handler,
990 __be64 service_id)
991{
992 struct cm_id_private *cm_id_priv;
993 struct ib_cm_id *cm_id;
994 unsigned long flags;
995 int err = 0;
996
997 /* Create an ID in advance, since the creation may sleep */
998 cm_id = ib_create_cm_id(device, cm_handler, NULL);
999 if (IS_ERR(cm_id))
1000 return cm_id;
1001
1002 spin_lock_irqsave(&cm.lock, flags);
1003
1004 if (service_id == IB_CM_ASSIGN_SERVICE_ID)
1005 goto new_id;
1006
1007 /* Find an existing ID */
73fec7fd 1008 cm_id_priv = cm_find_listen(device, service_id);
067b171b
HE		 1009 if (cm_id_priv) {
1010 if (cm_id->cm_handler != cm_handler || cm_id->context) {
1011 /* Sharing an ib_cm_id with different handlers is not
1012 * supported */
1013 spin_unlock_irqrestore(&cm.lock, flags);
1014 return ERR_PTR(-EINVAL);
1015 }
1016 atomic_inc(&cm_id_priv->refcount);
1017 ++cm_id_priv->listen_sharecount;
1018 spin_unlock_irqrestore(&cm.lock, flags);
1019
1020 ib_destroy_cm_id(cm_id);
1021 cm_id = &cm_id_priv->id;
1022 return cm_id;
1023 }
1024
1025new_id:
1026 /* Use newly created ID */
73fec7fd 1027 err = __ib_cm_listen(cm_id, service_id, 0);
067b171b
HE		 1028
1029 spin_unlock_irqrestore(&cm.lock, flags);
1030
1031 if (err) {
1032 ib_destroy_cm_id(cm_id);
1033 return ERR_PTR(err);
1034 }
1035 return cm_id;
1036}
1037EXPORT_SYMBOL(ib_cm_insert_listen);
1038
97f52eb4
SH		 1039static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
1040 enum cm_msg_sequence msg_seq)
a977049d
HR		 1041{
1042 u64 hi_tid, low_tid;
1043
1044 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
97f52eb4
SH		 1045 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
1046 (msg_seq << 30));
a977049d
HR		 1047 return cpu_to_be64(hi_tid | low_tid);
1048}
1049
1050static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 1051 __be16 attr_id, __be64 tid)
a977049d
HR		 1052{
1053 hdr->base_version = IB_MGMT_BASE_VERSION;
1054 hdr->mgmt_class = IB_MGMT_CLASS_CM;
1055 hdr->class_version = IB_CM_CLASS_VERSION;
1056 hdr->method = IB_MGMT_METHOD_SEND;
1057 hdr->attr_id = attr_id;
1058 hdr->tid = tid;
1059}
1060
1061static void cm_format_req(struct cm_req_msg *req_msg,
1062 struct cm_id_private *cm_id_priv,
1063 struct ib_cm_req_param *param)
1064{
3971c9f6
SH		 1065 struct ib_sa_path_rec *pri_path = param->primary_path;
1066 struct ib_sa_path_rec *alt_path = param->alternate_path;
1067
a977049d
HR		 1068 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
1069 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
1070
1071 req_msg->local_comm_id = cm_id_priv->id.local_id;
1072 req_msg->service_id = param->service_id;
e971b8cd 1073 req_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
a977049d 1074 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
a977049d
HR		 1075 cm_req_set_init_depth(req_msg, param->initiator_depth);
1076 cm_req_set_remote_resp_timeout(req_msg,
1077 param->remote_cm_response_timeout);
1078 cm_req_set_qp_type(req_msg, param->qp_type);
1079 cm_req_set_flow_ctrl(req_msg, param->flow_control);
1080 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
1081 cm_req_set_local_resp_timeout(req_msg,
1082 param->local_cm_response_timeout);
a977049d
HR		 1083 req_msg->pkey = param->primary_path->pkey;
1084 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
a977049d 1085 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
d26a360b
SH		 1086
1087 if (param->qp_type != IB_QPT_XRC_INI) {
1088 cm_req_set_resp_res(req_msg, param->responder_resources);
1089 cm_req_set_retry_count(req_msg, param->retry_count);
1090 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
1091 cm_req_set_srq(req_msg, param->srq);
1092 }
a977049d 1093
3971c9f6
SH		 1094 if (pri_path->hop_limit <= 1) {
1095 req_msg->primary_local_lid = pri_path->slid;
1096 req_msg->primary_remote_lid = pri_path->dlid;
1097 } else {
1098 /* Work-around until there's a way to obtain remote LID info */
1099 req_msg->primary_local_lid = IB_LID_PERMISSIVE;
1100 req_msg->primary_remote_lid = IB_LID_PERMISSIVE;
1101 }
1102 req_msg->primary_local_gid = pri_path->sgid;
1103 req_msg->primary_remote_gid = pri_path->dgid;
1104 cm_req_set_primary_flow_label(req_msg, pri_path->flow_label);
1105 cm_req_set_primary_packet_rate(req_msg, pri_path->rate);
1106 req_msg->primary_traffic_class = pri_path->traffic_class;
1107 req_msg->primary_hop_limit = pri_path->hop_limit;
1108 cm_req_set_primary_sl(req_msg, pri_path->sl);
1109 cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1));
a977049d 1110 cm_req_set_primary_local_ack_timeout(req_msg,
1d846126 1111 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
3971c9f6 1112 pri_path->packet_life_time));
a977049d 1113
3971c9f6
SH		 1114 if (alt_path) {
1115 if (alt_path->hop_limit <= 1) {
1116 req_msg->alt_local_lid = alt_path->slid;
1117 req_msg->alt_remote_lid = alt_path->dlid;
1118 } else {
1119 req_msg->alt_local_lid = IB_LID_PERMISSIVE;
1120 req_msg->alt_remote_lid = IB_LID_PERMISSIVE;
1121 }
1122 req_msg->alt_local_gid = alt_path->sgid;
1123 req_msg->alt_remote_gid = alt_path->dgid;
a977049d 1124 cm_req_set_alt_flow_label(req_msg,
3971c9f6
SH		 1125 alt_path->flow_label);
1126 cm_req_set_alt_packet_rate(req_msg, alt_path->rate);
1127 req_msg->alt_traffic_class = alt_path->traffic_class;
1128 req_msg->alt_hop_limit = alt_path->hop_limit;
1129 cm_req_set_alt_sl(req_msg, alt_path->sl);
1130 cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1));
a977049d 1131 cm_req_set_alt_local_ack_timeout(req_msg,
1d846126 1132 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
3971c9f6 1133 alt_path->packet_life_time));
a977049d
HR		 1134 }
1135
1136 if (param->private_data && param->private_data_len)
1137 memcpy(req_msg->private_data, param->private_data,
1138 param->private_data_len);
1139}
1140
858119e1 1141static int cm_validate_req_param(struct ib_cm_req_param *param)
a977049d
HR		 1142{
1143 /* peer-to-peer not supported */
1144 if (param->peer_to_peer)
1145 return -EINVAL;
1146
1147 if (!param->primary_path)
1148 return -EINVAL;
1149
d26a360b
SH		 1150 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC &&
1151 param->qp_type != IB_QPT_XRC_INI)
a977049d
HR		 1152 return -EINVAL;
1153
1154 if (param->private_data &&
1155 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
1156 return -EINVAL;
1157
1158 if (param->alternate_path &&
1159 (param->alternate_path->pkey != param->primary_path->pkey ||
1160 param->alternate_path->mtu != param->primary_path->mtu))
1161 return -EINVAL;
1162
1163 return 0;
1164}
1165
1166int ib_send_cm_req(struct ib_cm_id *cm_id,
1167 struct ib_cm_req_param *param)
1168{
1169 struct cm_id_private *cm_id_priv;
a977049d
HR		 1170 struct cm_req_msg *req_msg;
1171 unsigned long flags;
1172 int ret;
1173
1174 ret = cm_validate_req_param(param);
1175 if (ret)
1176 return ret;
1177
1178 /* Verify that we're not in timewait. */
1179 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1180 spin_lock_irqsave(&cm_id_priv->lock, flags);
1181 if (cm_id->state != IB_CM_IDLE) {
1182 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1183 ret = -EINVAL;
1184 goto out;
1185 }
1186 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1187
1188 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1189 id.local_id);
75df23e2
SH		 1190 if (IS_ERR(cm_id_priv->timewait_info)) {
1191 ret = PTR_ERR(cm_id_priv->timewait_info);
a977049d 1192 goto out;
75df23e2 1193 }
a977049d
HR		 1194
1195 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
1196 if (ret)
1197 goto error1;
1198 if (param->alternate_path) {
1199 ret = cm_init_av_by_path(param->alternate_path,
1200 &cm_id_priv->alt_av);
1201 if (ret)
1202 goto error1;
1203 }
1204 cm_id->service_id = param->service_id;
9c3da099 1205 cm_id->service_mask = ~cpu_to_be64(0);
a977049d
HR		 1206 cm_id_priv->timeout_ms = cm_convert_to_ms(
1207 param->primary_path->packet_life_time) * 2 +
1208 cm_convert_to_ms(
1209 param->remote_cm_response_timeout);
1210 cm_id_priv->max_cm_retries = param->max_cm_retries;
1211 cm_id_priv->initiator_depth = param->initiator_depth;
1212 cm_id_priv->responder_resources = param->responder_resources;
1213 cm_id_priv->retry_count = param->retry_count;
1214 cm_id_priv->path_mtu = param->primary_path->mtu;
e1444b5a 1215 cm_id_priv->pkey = param->primary_path->pkey;
ae7971a7 1216 cm_id_priv->qp_type = param->qp_type;
a977049d
HR		 1217
1218 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1219 if (ret)
1220 goto error1;
1221
1222 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1223 cm_format_req(req_msg, cm_id_priv, param);
1224 cm_id_priv->tid = req_msg->hdr.tid;
34816ad9 1225 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1226 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1227
1228 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1229 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
a977049d
HR		 1230
1231 spin_lock_irqsave(&cm_id_priv->lock, flags);
34816ad9 1232 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
a977049d
HR		 1233 if (ret) {
1234 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1235 goto error2;
1236 }
1237 BUG_ON(cm_id->state != IB_CM_IDLE);
1238 cm_id->state = IB_CM_REQ_SENT;
1239 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1240 return 0;
1241
1242error2: cm_free_msg(cm_id_priv->msg);
1243error1: kfree(cm_id_priv->timewait_info);
1244out: return ret;
1245}
1246EXPORT_SYMBOL(ib_send_cm_req);
1247
1248static int cm_issue_rej(struct cm_port *port,
1249 struct ib_mad_recv_wc *mad_recv_wc,
1250 enum ib_cm_rej_reason reason,
1251 enum cm_msg_response msg_rejected,
1252 void *ari, u8 ari_length)
1253{
1254 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1255 struct cm_rej_msg *rej_msg, *rcv_msg;
1256 int ret;
1257
1258 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1259 if (ret)
1260 return ret;
1261
1262 /* We just need common CM header information. Cast to any message. */
1263 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1264 rej_msg = (struct cm_rej_msg *) msg->mad;
1265
1266 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1267 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1268 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1269 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 1270 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1271
1272 if (ari && ari_length) {
1273 cm_rej_set_reject_info_len(rej_msg, ari_length);
1274 memcpy(rej_msg->ari, ari, ari_length);
1275 }
1276
34816ad9 1277 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1278 if (ret)
1279 cm_free_msg(msg);
1280
1281 return ret;
1282}
1283
97f52eb4
SH		 1284static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1285 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 1286{
1287 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1288 ((local_ca_guid == remote_ca_guid) &&
1289 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1290}
1291
858119e1 1292static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
a977049d
HR		 1293 struct ib_sa_path_rec *primary_path,
1294 struct ib_sa_path_rec *alt_path)
1295{
1296 memset(primary_path, 0, sizeof *primary_path);
1297 primary_path->dgid = req_msg->primary_local_gid;
1298 primary_path->sgid = req_msg->primary_remote_gid;
1299 primary_path->dlid = req_msg->primary_local_lid;
1300 primary_path->slid = req_msg->primary_remote_lid;
1301 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1302 primary_path->hop_limit = req_msg->primary_hop_limit;
1303 primary_path->traffic_class = req_msg->primary_traffic_class;
1304 primary_path->reversible = 1;
1305 primary_path->pkey = req_msg->pkey;
1306 primary_path->sl = cm_req_get_primary_sl(req_msg);
1307 primary_path->mtu_selector = IB_SA_EQ;
1308 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1309 primary_path->rate_selector = IB_SA_EQ;
1310 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1311 primary_path->packet_life_time_selector = IB_SA_EQ;
1312 primary_path->packet_life_time =
1313 cm_req_get_primary_local_ack_timeout(req_msg);
1314 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
15865e7d 1315 primary_path->service_id = req_msg->service_id;
a977049d
HR		 1316
1317 if (req_msg->alt_local_lid) {
1318 memset(alt_path, 0, sizeof *alt_path);
1319 alt_path->dgid = req_msg->alt_local_gid;
1320 alt_path->sgid = req_msg->alt_remote_gid;
1321 alt_path->dlid = req_msg->alt_local_lid;
1322 alt_path->slid = req_msg->alt_remote_lid;
1323 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1324 alt_path->hop_limit = req_msg->alt_hop_limit;
1325 alt_path->traffic_class = req_msg->alt_traffic_class;
1326 alt_path->reversible = 1;
1327 alt_path->pkey = req_msg->pkey;
1328 alt_path->sl = cm_req_get_alt_sl(req_msg);
1329 alt_path->mtu_selector = IB_SA_EQ;
1330 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1331 alt_path->rate_selector = IB_SA_EQ;
1332 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1333 alt_path->packet_life_time_selector = IB_SA_EQ;
1334 alt_path->packet_life_time =
1335 cm_req_get_alt_local_ack_timeout(req_msg);
1336 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
15865e7d 1337 alt_path->service_id = req_msg->service_id;
a977049d
HR		 1338 }
1339}
1340
24cad9a7
HE		 1341static u16 cm_get_bth_pkey(struct cm_work *work)
1342{
1343 struct ib_device *ib_dev = work->port->cm_dev->ib_device;
1344 u8 port_num = work->port->port_num;
1345 u16 pkey_index = work->mad_recv_wc->wc->pkey_index;
1346 u16 pkey;
1347 int ret;
1348
1349 ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey);
1350 if (ret) {
1351 dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %d, pkey index %d). %d\n",
1352 port_num, pkey_index, ret);
1353 return 0;
1354 }
1355
1356 return pkey;
1357}
1358
a977049d
HR		 1359static void cm_format_req_event(struct cm_work *work,
1360 struct cm_id_private *cm_id_priv,
1361 struct ib_cm_id *listen_id)
1362{
1363 struct cm_req_msg *req_msg;
1364 struct ib_cm_req_event_param *param;
1365
1366 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1367 param = &work->cm_event.param.req_rcvd;
1368 param->listen_id = listen_id;
24cad9a7 1369 param->bth_pkey = cm_get_bth_pkey(work);
a977049d
HR		 1370 param->port = cm_id_priv->av.port->port_num;
1371 param->primary_path = &work->path[0];
1372 if (req_msg->alt_local_lid)
1373 param->alternate_path = &work->path[1];
1374 else
1375 param->alternate_path = NULL;
1376 param->remote_ca_guid = req_msg->local_ca_guid;
1377 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1378 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1379 param->qp_type = cm_req_get_qp_type(req_msg);
1380 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1381 param->responder_resources = cm_req_get_init_depth(req_msg);
1382 param->initiator_depth = cm_req_get_resp_res(req_msg);
1383 param->local_cm_response_timeout =
1384 cm_req_get_remote_resp_timeout(req_msg);
1385 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1386 param->remote_cm_response_timeout =
1387 cm_req_get_local_resp_timeout(req_msg);
1388 param->retry_count = cm_req_get_retry_count(req_msg);
1389 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1390 param->srq = cm_req_get_srq(req_msg);
1391 work->cm_event.private_data = &req_msg->private_data;
1392}
1393
1394static void cm_process_work(struct cm_id_private *cm_id_priv,
1395 struct cm_work *work)
1396{
a977049d
HR		 1397 int ret;
1398
1399 /* We will typically only have the current event to report. */
1400 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1401 cm_free_work(work);
1402
1403 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
24be6e81 1404 spin_lock_irq(&cm_id_priv->lock);
a977049d 1405 work = cm_dequeue_work(cm_id_priv);
24be6e81 1406 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1407 BUG_ON(!work);
1408 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1409 &work->cm_event);
1410 cm_free_work(work);
1411 }
1412 cm_deref_id(cm_id_priv);
1413 if (ret)
04c33543 1414 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 1415}
1416
1417static void cm_format_mra(struct cm_mra_msg *mra_msg,
1418 struct cm_id_private *cm_id_priv,
1419 enum cm_msg_response msg_mraed, u8 service_timeout,
1420 const void *private_data, u8 private_data_len)
1421{
1422 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1423 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1424 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1425 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1426 cm_mra_set_service_timeout(mra_msg, service_timeout);
1427
1428 if (private_data && private_data_len)
1429 memcpy(mra_msg->private_data, private_data, private_data_len);
1430}
1431
1432static void cm_format_rej(struct cm_rej_msg *rej_msg,
1433 struct cm_id_private *cm_id_priv,
1434 enum ib_cm_rej_reason reason,
1435 void *ari,
1436 u8 ari_length,
1437 const void *private_data,
1438 u8 private_data_len)
1439{
1440 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1441 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1442
1443 switch(cm_id_priv->id.state) {
1444 case IB_CM_REQ_RCVD:
1445 rej_msg->local_comm_id = 0;
1446 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1447 break;
1448 case IB_CM_MRA_REQ_SENT:
1449 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1450 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1451 break;
1452 case IB_CM_REP_RCVD:
1453 case IB_CM_MRA_REP_SENT:
1454 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1455 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1456 break;
1457 default:
1458 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1459 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1460 break;
1461 }
1462
97f52eb4 1463 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1464 if (ari && ari_length) {
1465 cm_rej_set_reject_info_len(rej_msg, ari_length);
1466 memcpy(rej_msg->ari, ari, ari_length);
1467 }
1468
1469 if (private_data && private_data_len)
1470 memcpy(rej_msg->private_data, private_data, private_data_len);
1471}
1472
1473static void cm_dup_req_handler(struct cm_work *work,
1474 struct cm_id_private *cm_id_priv)
1475{
1476 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1477 int ret;
1478
9af57b7a
SH		 1479 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1480 counter[CM_REQ_COUNTER]);
1481
a977049d
HR		 1482 /* Quick state check to discard duplicate REQs. */
1483 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1484 return;
1485
1486 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1487 if (ret)
1488 return;
1489
24be6e81 1490 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 1491 switch (cm_id_priv->id.state) {
1492 case IB_CM_MRA_REQ_SENT:
1493 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1494 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1495 cm_id_priv->private_data,
1496 cm_id_priv->private_data_len);
1497 break;
1498 case IB_CM_TIMEWAIT:
1499 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1500 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1501 break;
1502 default:
1503 goto unlock;
1504 }
24be6e81 1505 spin_unlock_irq(&cm_id_priv->lock);
a977049d 1506
34816ad9 1507 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1508 if (ret)
1509 goto free;
1510 return;
1511
24be6e81 1512unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1513free: cm_free_msg(msg);
1514}
1515
1516static struct cm_id_private * cm_match_req(struct cm_work *work,
1517 struct cm_id_private *cm_id_priv)
1518{
1519 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1520 struct cm_timewait_info *timewait_info;
1521 struct cm_req_msg *req_msg;
a977049d
HR		 1522
1523 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1524
d998ccce 1525 /* Check for possible duplicate REQ. */
24be6e81 1526 spin_lock_irq(&cm.lock);
a977049d 1527 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
a977049d
HR		 1528 if (timewait_info) {
1529 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1530 timewait_info->work.remote_id);
24be6e81 1531 spin_unlock_irq(&cm.lock);
a977049d
HR		 1532 if (cur_cm_id_priv) {
1533 cm_dup_req_handler(work, cur_cm_id_priv);
1534 cm_deref_id(cur_cm_id_priv);
d998ccce
SH		 1535 }
1536 return NULL;
1537 }
1538
1539 /* Check for stale connections. */
1540 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1541 if (timewait_info) {
1542 cm_cleanup_timewait(cm_id_priv->timewait_info);
24be6e81 1543 spin_unlock_irq(&cm.lock);
d998ccce
SH		 1544 cm_issue_rej(work->port, work->mad_recv_wc,
1545 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1546 NULL, 0);
1547 return NULL;
a977049d
HR		 1548 }
1549
1550 /* Find matching listen request. */
07d357d0 1551 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
73fec7fd 1552 req_msg->service_id);
a977049d 1553 if (!listen_cm_id_priv) {
8575329d 1554 cm_cleanup_timewait(cm_id_priv->timewait_info);
24be6e81 1555 spin_unlock_irq(&cm.lock);
a977049d
HR		 1556 cm_issue_rej(work->port, work->mad_recv_wc,
1557 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1558 NULL, 0);
8575329d 1559 goto out;
a977049d
HR		 1560 }
1561 atomic_inc(&listen_cm_id_priv->refcount);
1562 atomic_inc(&cm_id_priv->refcount);
1563 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1564 atomic_inc(&cm_id_priv->work_count);
24be6e81 1565 spin_unlock_irq(&cm.lock);
8575329d 1566out:
a977049d 1567 return listen_cm_id_priv;
a977049d
HR		 1568}
1569
3971c9f6
SH		 1570/*
1571 * Work-around for inter-subnet connections. If the LIDs are permissive,
1572 * we need to override the LID/SL data in the REQ with the LID information
1573 * in the work completion.
1574 */
1575static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
1576{
1577 if (!cm_req_get_primary_subnet_local(req_msg)) {
1578 if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) {
1579 req_msg->primary_local_lid = cpu_to_be16(wc->slid);
1580 cm_req_set_primary_sl(req_msg, wc->sl);
1581 }
1582
1583 if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE)
1584 req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits);
1585 }
1586
1587 if (!cm_req_get_alt_subnet_local(req_msg)) {
1588 if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) {
1589 req_msg->alt_local_lid = cpu_to_be16(wc->slid);
1590 cm_req_set_alt_sl(req_msg, wc->sl);
1591 }
1592
1593 if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE)
1594 req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits);
1595 }
1596}
1597
a977049d
HR		 1598static int cm_req_handler(struct cm_work *work)
1599{
1600 struct ib_cm_id *cm_id;
1601 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1602 struct cm_req_msg *req_msg;
1603 int ret;
1604
1605 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1606
d4c4196f 1607 cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
a977049d
HR		 1608 if (IS_ERR(cm_id))
1609 return PTR_ERR(cm_id);
1610
1611 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1612 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1613 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 1614 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 1615 &cm_id_priv->av);
1616 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1617 id.local_id);
1618 if (IS_ERR(cm_id_priv->timewait_info)) {
1619 ret = PTR_ERR(cm_id_priv->timewait_info);
76842405 1620 goto destroy;
a977049d
HR		 1621 }
1622 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1623 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1624 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1625
1626 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1627 if (!listen_cm_id_priv) {
1628 ret = -EINVAL;
76842405
SH		 1629 kfree(cm_id_priv->timewait_info);
1630 goto destroy;
a977049d
HR		 1631 }
1632
1633 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1634 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1635 cm_id_priv->id.service_id = req_msg->service_id;
9c3da099 1636 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
a977049d 1637
3971c9f6 1638 cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
a977049d 1639 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
dd5f03be
MB		 1640
1641 memcpy(work->path[0].dmac, cm_id_priv->av.ah_attr.dmac, ETH_ALEN);
a977049d 1642 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
76842405 1643 if (ret) {
d4c4196f 1644 ib_get_cached_gid(work->port->cm_dev->ib_device,
55ee3ab2
MB		 1645 work->port->port_num, 0, &work->path[0].sgid,
1646 NULL);
76842405
SH		 1647 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1648 &work->path[0].sgid, sizeof work->path[0].sgid,
1649 NULL, 0);
1650 goto rejected;
1651 }
a977049d
HR		 1652 if (req_msg->alt_local_lid) {
1653 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
76842405
SH		 1654 if (ret) {
1655 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1656 &work->path[0].sgid,
1657 sizeof work->path[0].sgid, NULL, 0);
1658 goto rejected;
1659 }
a977049d
HR		 1660 }
1661 cm_id_priv->tid = req_msg->hdr.tid;
1662 cm_id_priv->timeout_ms = cm_convert_to_ms(
1663 cm_req_get_local_resp_timeout(req_msg));
1664 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1665 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1666 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1667 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1668 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
e1444b5a 1669 cm_id_priv->pkey = req_msg->pkey;
a977049d 1670 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
a977049d
HR		 1671 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1672 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
ae7971a7 1673 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
a977049d
HR		 1674
1675 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1676 cm_process_work(cm_id_priv, work);
1677 cm_deref_id(listen_cm_id_priv);
1678 return 0;
1679
76842405
SH		 1680rejected:
1681 atomic_dec(&cm_id_priv->refcount);
a977049d 1682 cm_deref_id(listen_cm_id_priv);
76842405
SH		 1683destroy:
1684 ib_destroy_cm_id(cm_id);
a977049d
HR		 1685 return ret;
1686}
1687
1688static void cm_format_rep(struct cm_rep_msg *rep_msg,
1689 struct cm_id_private *cm_id_priv,
1690 struct ib_cm_rep_param *param)
1691{
1692 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1693 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1694 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
a977049d
HR		 1695 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1696 rep_msg->resp_resources = param->responder_resources;
1d846126
SH		 1697 cm_rep_set_target_ack_delay(rep_msg,
1698 cm_id_priv->av.port->cm_dev->ack_delay);
a977049d 1699 cm_rep_set_failover(rep_msg, param->failover_accepted);
a977049d 1700 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
e971b8cd 1701 rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
a977049d 1702
d26a360b
SH		 1703 if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
1704 rep_msg->initiator_depth = param->initiator_depth;
1705 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1706 cm_rep_set_srq(rep_msg, param->srq);
ef700446 1707 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
d26a360b
SH		 1708 } else {
1709 cm_rep_set_srq(rep_msg, 1);
ef700446 1710 cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num));
d26a360b
SH		 1711 }
1712
a977049d
HR		 1713 if (param->private_data && param->private_data_len)
1714 memcpy(rep_msg->private_data, param->private_data,
1715 param->private_data_len);
1716}
1717
1718int ib_send_cm_rep(struct ib_cm_id *cm_id,
1719 struct ib_cm_rep_param *param)
1720{
1721 struct cm_id_private *cm_id_priv;
1722 struct ib_mad_send_buf *msg;
1723 struct cm_rep_msg *rep_msg;
a977049d
HR		 1724 unsigned long flags;
1725 int ret;
1726
1727 if (param->private_data &&
1728 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1729 return -EINVAL;
1730
1731 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1732 spin_lock_irqsave(&cm_id_priv->lock, flags);
1733 if (cm_id->state != IB_CM_REQ_RCVD &&
1734 cm_id->state != IB_CM_MRA_REQ_SENT) {
1735 ret = -EINVAL;
1736 goto out;
1737 }
1738
1739 ret = cm_alloc_msg(cm_id_priv, &msg);
1740 if (ret)
1741 goto out;
1742
1743 rep_msg = (struct cm_rep_msg *) msg->mad;
1744 cm_format_rep(rep_msg, cm_id_priv, param);
34816ad9 1745 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1746 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1747
34816ad9 1748 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1749 if (ret) {
1750 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1751 cm_free_msg(msg);
1752 return ret;
1753 }
1754
1755 cm_id->state = IB_CM_REP_SENT;
1756 cm_id_priv->msg = msg;
1757 cm_id_priv->initiator_depth = param->initiator_depth;
1758 cm_id_priv->responder_resources = param->responder_resources;
1759 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
ef700446 1760 cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
a977049d
HR		 1761
1762out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1763 return ret;
1764}
1765EXPORT_SYMBOL(ib_send_cm_rep);
1766
1767static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1768 struct cm_id_private *cm_id_priv,
1769 const void *private_data,
1770 u8 private_data_len)
1771{
1772 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1773 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1774 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1775
1776 if (private_data && private_data_len)
1777 memcpy(rtu_msg->private_data, private_data, private_data_len);
1778}
1779
1780int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1781 const void *private_data,
1782 u8 private_data_len)
1783{
1784 struct cm_id_private *cm_id_priv;
1785 struct ib_mad_send_buf *msg;
a977049d
HR		 1786 unsigned long flags;
1787 void *data;
1788 int ret;
1789
1790 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1791 return -EINVAL;
1792
1793 data = cm_copy_private_data(private_data, private_data_len);
1794 if (IS_ERR(data))
1795 return PTR_ERR(data);
1796
1797 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1798 spin_lock_irqsave(&cm_id_priv->lock, flags);
1799 if (cm_id->state != IB_CM_REP_RCVD &&
1800 cm_id->state != IB_CM_MRA_REP_SENT) {
1801 ret = -EINVAL;
1802 goto error;
1803 }
1804
1805 ret = cm_alloc_msg(cm_id_priv, &msg);
1806 if (ret)
1807 goto error;
1808
1809 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1810 private_data, private_data_len);
1811
34816ad9 1812 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1813 if (ret) {
1814 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1815 cm_free_msg(msg);
1816 kfree(data);
1817 return ret;
1818 }
1819
1820 cm_id->state = IB_CM_ESTABLISHED;
1821 cm_set_private_data(cm_id_priv, data, private_data_len);
1822 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1823 return 0;
1824
1825error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1826 kfree(data);
1827 return ret;
1828}
1829EXPORT_SYMBOL(ib_send_cm_rtu);
1830
ef700446 1831static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type)
a977049d
HR		 1832{
1833 struct cm_rep_msg *rep_msg;
1834 struct ib_cm_rep_event_param *param;
1835
1836 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1837 param = &work->cm_event.param.rep_rcvd;
1838 param->remote_ca_guid = rep_msg->local_ca_guid;
1839 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
ef700446 1840 param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type));
a977049d
HR		 1841 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1842 param->responder_resources = rep_msg->initiator_depth;
1843 param->initiator_depth = rep_msg->resp_resources;
1844 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1845 param->failover_accepted = cm_rep_get_failover(rep_msg);
1846 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1847 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1848 param->srq = cm_rep_get_srq(rep_msg);
1849 work->cm_event.private_data = &rep_msg->private_data;
1850}
1851
1852static void cm_dup_rep_handler(struct cm_work *work)
1853{
1854 struct cm_id_private *cm_id_priv;
1855 struct cm_rep_msg *rep_msg;
1856 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1857 int ret;
1858
1859 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1860 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1861 rep_msg->local_comm_id);
1862 if (!cm_id_priv)
1863 return;
1864
9af57b7a
SH		 1865 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1866 counter[CM_REP_COUNTER]);
a977049d
HR		 1867 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1868 if (ret)
1869 goto deref;
1870
24be6e81 1871 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 1872 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1873 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1874 cm_id_priv->private_data,
1875 cm_id_priv->private_data_len);
1876 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1877 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1878 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1879 cm_id_priv->private_data,
1880 cm_id_priv->private_data_len);
1881 else
1882 goto unlock;
24be6e81 1883 spin_unlock_irq(&cm_id_priv->lock);
a977049d 1884
34816ad9 1885 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1886 if (ret)
1887 goto free;
1888 goto deref;
1889
24be6e81 1890unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1891free: cm_free_msg(msg);
1892deref: cm_deref_id(cm_id_priv);
1893}
1894
1895static int cm_rep_handler(struct cm_work *work)
1896{
1897 struct cm_id_private *cm_id_priv;
1898 struct cm_rep_msg *rep_msg;
a977049d
HR		 1899 int ret;
1900
1901 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1902 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1903 if (!cm_id_priv) {
1904 cm_dup_rep_handler(work);
1905 return -EINVAL;
1906 }
1907
ef700446 1908 cm_format_rep_event(work, cm_id_priv->qp_type);
87fd1a11 1909
24be6e81 1910 spin_lock_irq(&cm_id_priv->lock);
87fd1a11
SH		 1911 switch (cm_id_priv->id.state) {
1912 case IB_CM_REQ_SENT:
1913 case IB_CM_MRA_REQ_RCVD:
1914 break;
1915 default:
24be6e81 1916 spin_unlock_irq(&cm_id_priv->lock);
87fd1a11
SH		 1917 ret = -EINVAL;
1918 goto error;
1919 }
1920
a977049d
HR		 1921 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1922 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
ef700446 1923 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
a977049d 1924
87fd1a11 1925 spin_lock(&cm.lock);
a977049d
HR		 1926 /* Check for duplicate REP. */
1927 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
87fd1a11 1928 spin_unlock(&cm.lock);
24be6e81 1929 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1930 ret = -EINVAL;
1931 goto error;
1932 }
1933 /* Check for a stale connection. */
1934 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1935 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1936 &cm.remote_id_table);
1937 cm_id_priv->timewait_info->inserted_remote_id = 0;
1938 spin_unlock(&cm.lock);
24be6e81 1939 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1940 cm_issue_rej(work->port, work->mad_recv_wc,
1941 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1942 NULL, 0);
1943 ret = -EINVAL;
1944 goto error;
1945 }
87fd1a11 1946 spin_unlock(&cm.lock);
a977049d 1947
a977049d
HR		 1948 cm_id_priv->id.state = IB_CM_REP_RCVD;
1949 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
ef700446 1950 cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
a977049d
HR		 1951 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1952 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1953 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1954 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1d846126
SH		 1955 cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1956 cm_id_priv->av.timeout =
1957 cm_ack_timeout(cm_id_priv->target_ack_delay,
1958 cm_id_priv->av.timeout - 1);
1959 cm_id_priv->alt_av.timeout =
1960 cm_ack_timeout(cm_id_priv->target_ack_delay,
1961 cm_id_priv->alt_av.timeout - 1);
a977049d
HR		 1962
1963 /* todo: handle peer_to_peer */
1964
34816ad9 1965 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1966 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1967 if (!ret)
1968 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 1969 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1970
1971 if (ret)
1972 cm_process_work(cm_id_priv, work);
1973 else
1974 cm_deref_id(cm_id_priv);
1975 return 0;
1976
87fd1a11 1977error:
a977049d
HR		 1978 cm_deref_id(cm_id_priv);
1979 return ret;
1980}
1981
1982static int cm_establish_handler(struct cm_work *work)
1983{
1984 struct cm_id_private *cm_id_priv;
a977049d
HR		 1985 int ret;
1986
e1444b5a 1987 /* See comment in cm_establish about lookup. */
a977049d
HR		 1988 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1989 if (!cm_id_priv)
1990 return -EINVAL;
1991
24be6e81 1992 spin_lock_irq(&cm_id_priv->lock);
a977049d 1993 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
24be6e81 1994 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1995 goto out;
1996 }
1997
34816ad9 1998 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1999 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2000 if (!ret)
2001 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2002 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2003
2004 if (ret)
2005 cm_process_work(cm_id_priv, work);
2006 else
2007 cm_deref_id(cm_id_priv);
2008 return 0;
2009out:
2010 cm_deref_id(cm_id_priv);
2011 return -EINVAL;
2012}
2013
2014static int cm_rtu_handler(struct cm_work *work)
2015{
2016 struct cm_id_private *cm_id_priv;
2017 struct cm_rtu_msg *rtu_msg;
a977049d
HR		 2018 int ret;
2019
2020 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
2021 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
2022 rtu_msg->local_comm_id);
2023 if (!cm_id_priv)
2024 return -EINVAL;
2025
2026 work->cm_event.private_data = &rtu_msg->private_data;
2027
24be6e81 2028 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2029 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
2030 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
24be6e81 2031 spin_unlock_irq(&cm_id_priv->lock);
9af57b7a
SH		 2032 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2033 counter[CM_RTU_COUNTER]);
a977049d
HR		 2034 goto out;
2035 }
2036 cm_id_priv->id.state = IB_CM_ESTABLISHED;
2037
34816ad9 2038 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2039 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2040 if (!ret)
2041 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2042 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2043
2044 if (ret)
2045 cm_process_work(cm_id_priv, work);
2046 else
2047 cm_deref_id(cm_id_priv);
2048 return 0;
2049out:
2050 cm_deref_id(cm_id_priv);
2051 return -EINVAL;
2052}
2053
2054static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
2055 struct cm_id_private *cm_id_priv,
2056 const void *private_data,
2057 u8 private_data_len)
2058{
2059 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
2060 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
2061 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
2062 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
2063 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
2064
2065 if (private_data && private_data_len)
2066 memcpy(dreq_msg->private_data, private_data, private_data_len);
2067}
2068
2069int ib_send_cm_dreq(struct ib_cm_id *cm_id,
2070 const void *private_data,
2071 u8 private_data_len)
2072{
2073 struct cm_id_private *cm_id_priv;
2074 struct ib_mad_send_buf *msg;
a977049d
HR		 2075 unsigned long flags;
2076 int ret;
2077
2078 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
2079 return -EINVAL;
2080
2081 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2082 spin_lock_irqsave(&cm_id_priv->lock, flags);
2083 if (cm_id->state != IB_CM_ESTABLISHED) {
2084 ret = -EINVAL;
2085 goto out;
2086 }
2087
8d8ac865
SH		 2088 if (cm_id->lap_state == IB_CM_LAP_SENT ||
2089 cm_id->lap_state == IB_CM_MRA_LAP_RCVD)
2090 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2091
a977049d
HR		 2092 ret = cm_alloc_msg(cm_id_priv, &msg);
2093 if (ret) {
2094 cm_enter_timewait(cm_id_priv);
2095 goto out;
2096 }
2097
2098 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
2099 private_data, private_data_len);
34816ad9 2100 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2101 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
2102
34816ad9 2103 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2104 if (ret) {
2105 cm_enter_timewait(cm_id_priv);
2106 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2107 cm_free_msg(msg);
2108 return ret;
2109 }
2110
2111 cm_id->state = IB_CM_DREQ_SENT;
2112 cm_id_priv->msg = msg;
2113out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2114 return ret;
2115}
2116EXPORT_SYMBOL(ib_send_cm_dreq);
2117
2118static void cm_format_drep(struct cm_drep_msg *drep_msg,
2119 struct cm_id_private *cm_id_priv,
2120 const void *private_data,
2121 u8 private_data_len)
2122{
2123 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
2124 drep_msg->local_comm_id = cm_id_priv->id.local_id;
2125 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
2126
2127 if (private_data && private_data_len)
2128 memcpy(drep_msg->private_data, private_data, private_data_len);
2129}
2130
2131int ib_send_cm_drep(struct ib_cm_id *cm_id,
2132 const void *private_data,
2133 u8 private_data_len)
2134{
2135 struct cm_id_private *cm_id_priv;
2136 struct ib_mad_send_buf *msg;
a977049d
HR		 2137 unsigned long flags;
2138 void *data;
2139 int ret;
2140
2141 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
2142 return -EINVAL;
2143
2144 data = cm_copy_private_data(private_data, private_data_len);
2145 if (IS_ERR(data))
2146 return PTR_ERR(data);
2147
2148 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2149 spin_lock_irqsave(&cm_id_priv->lock, flags);
2150 if (cm_id->state != IB_CM_DREQ_RCVD) {
2151 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2152 kfree(data);
2153 return -EINVAL;
2154 }
2155
2156 cm_set_private_data(cm_id_priv, data, private_data_len);
2157 cm_enter_timewait(cm_id_priv);
2158
2159 ret = cm_alloc_msg(cm_id_priv, &msg);
2160 if (ret)
2161 goto out;
2162
2163 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2164 private_data, private_data_len);
2165
34816ad9 2166 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2167 if (ret) {
2168 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2169 cm_free_msg(msg);
2170 return ret;
2171 }
2172
2173out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2174 return ret;
2175}
2176EXPORT_SYMBOL(ib_send_cm_drep);
2177
82a9c16a
SH		 2178static int cm_issue_drep(struct cm_port *port,
2179 struct ib_mad_recv_wc *mad_recv_wc)
2180{
2181 struct ib_mad_send_buf *msg = NULL;
2182 struct cm_dreq_msg *dreq_msg;
2183 struct cm_drep_msg *drep_msg;
2184 int ret;
2185
2186 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
2187 if (ret)
2188 return ret;
2189
2190 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
2191 drep_msg = (struct cm_drep_msg *) msg->mad;
2192
2193 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
2194 drep_msg->remote_comm_id = dreq_msg->local_comm_id;
2195 drep_msg->local_comm_id = dreq_msg->remote_comm_id;
2196
2197 ret = ib_post_send_mad(msg, NULL);
2198 if (ret)
2199 cm_free_msg(msg);
2200
2201 return ret;
2202}
2203
a977049d
HR		 2204static int cm_dreq_handler(struct cm_work *work)
2205{
2206 struct cm_id_private *cm_id_priv;
2207 struct cm_dreq_msg *dreq_msg;
2208 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2209 int ret;
2210
2211 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
2212 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
2213 dreq_msg->local_comm_id);
82a9c16a 2214 if (!cm_id_priv) {
9af57b7a
SH		 2215 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2216 counter[CM_DREQ_COUNTER]);
82a9c16a 2217 cm_issue_drep(work->port, work->mad_recv_wc);
a977049d 2218 return -EINVAL;
82a9c16a 2219 }
a977049d
HR		 2220
2221 work->cm_event.private_data = &dreq_msg->private_data;
2222
24be6e81 2223 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2224 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
2225 goto unlock;
2226
2227 switch (cm_id_priv->id.state) {
2228 case IB_CM_REP_SENT:
2229 case IB_CM_DREQ_SENT:
34816ad9 2230 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2231 break;
2232 case IB_CM_ESTABLISHED:
8d8ac865
SH		 2233 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
2234 cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2235 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2236 break;
a977049d
HR		 2237 case IB_CM_MRA_REP_RCVD:
2238 break;
2239 case IB_CM_TIMEWAIT:
9af57b7a
SH		 2240 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2241 counter[CM_DREQ_COUNTER]);
a977049d
HR		 2242 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2243 goto unlock;
2244
2245 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2246 cm_id_priv->private_data,
2247 cm_id_priv->private_data_len);
24be6e81 2248 spin_unlock_irq(&cm_id_priv->lock);
a977049d 2249
34816ad9 2250 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2251 cm_free_msg(msg);
2252 goto deref;
9af57b7a
SH		 2253 case IB_CM_DREQ_RCVD:
2254 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2255 counter[CM_DREQ_COUNTER]);
2256 goto unlock;
a977049d
HR		 2257 default:
2258 goto unlock;
2259 }
2260 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
2261 cm_id_priv->tid = dreq_msg->hdr.tid;
2262 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2263 if (!ret)
2264 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2265 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2266
2267 if (ret)
2268 cm_process_work(cm_id_priv, work);
2269 else
2270 cm_deref_id(cm_id_priv);
2271 return 0;
2272
24be6e81 2273unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2274deref: cm_deref_id(cm_id_priv);
2275 return -EINVAL;
2276}
2277
2278static int cm_drep_handler(struct cm_work *work)
2279{
2280 struct cm_id_private *cm_id_priv;
2281 struct cm_drep_msg *drep_msg;
a977049d
HR		 2282 int ret;
2283
2284 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
2285 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
2286 drep_msg->local_comm_id);
2287 if (!cm_id_priv)
2288 return -EINVAL;
2289
2290 work->cm_event.private_data = &drep_msg->private_data;
2291
24be6e81 2292 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2293 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2294 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
24be6e81 2295 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2296 goto out;
2297 }
2298 cm_enter_timewait(cm_id_priv);
2299
34816ad9 2300 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2301 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2302 if (!ret)
2303 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2304 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2305
2306 if (ret)
2307 cm_process_work(cm_id_priv, work);
2308 else
2309 cm_deref_id(cm_id_priv);
2310 return 0;
2311out:
2312 cm_deref_id(cm_id_priv);
2313 return -EINVAL;
2314}
2315
2316int ib_send_cm_rej(struct ib_cm_id *cm_id,
2317 enum ib_cm_rej_reason reason,
2318 void *ari,
2319 u8 ari_length,
2320 const void *private_data,
2321 u8 private_data_len)
2322{
2323 struct cm_id_private *cm_id_priv;
2324 struct ib_mad_send_buf *msg;
a977049d
HR		 2325 unsigned long flags;
2326 int ret;
2327
2328 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2329 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2330 return -EINVAL;
2331
2332 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2333
2334 spin_lock_irqsave(&cm_id_priv->lock, flags);
2335 switch (cm_id->state) {
2336 case IB_CM_REQ_SENT:
2337 case IB_CM_MRA_REQ_RCVD:
2338 case IB_CM_REQ_RCVD:
2339 case IB_CM_MRA_REQ_SENT:
2340 case IB_CM_REP_RCVD:
2341 case IB_CM_MRA_REP_SENT:
2342 ret = cm_alloc_msg(cm_id_priv, &msg);
2343 if (!ret)
2344 cm_format_rej((struct cm_rej_msg *) msg->mad,
2345 cm_id_priv, reason, ari, ari_length,
2346 private_data, private_data_len);
2347
2348 cm_reset_to_idle(cm_id_priv);
2349 break;
2350 case IB_CM_REP_SENT:
2351 case IB_CM_MRA_REP_RCVD:
2352 ret = cm_alloc_msg(cm_id_priv, &msg);
2353 if (!ret)
2354 cm_format_rej((struct cm_rej_msg *) msg->mad,
2355 cm_id_priv, reason, ari, ari_length,
2356 private_data, private_data_len);
2357
2358 cm_enter_timewait(cm_id_priv);
2359 break;
2360 default:
2361 ret = -EINVAL;
2362 goto out;
2363 }
2364
2365 if (ret)
2366 goto out;
2367
34816ad9 2368 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2369 if (ret)
2370 cm_free_msg(msg);
2371
2372out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2373 return ret;
2374}
2375EXPORT_SYMBOL(ib_send_cm_rej);
2376
2377static void cm_format_rej_event(struct cm_work *work)
2378{
2379 struct cm_rej_msg *rej_msg;
2380 struct ib_cm_rej_event_param *param;
2381
2382 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2383 param = &work->cm_event.param.rej_rcvd;
2384 param->ari = rej_msg->ari;
2385 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 2386 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 2387 work->cm_event.private_data = &rej_msg->private_data;
2388}
2389
2390static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2391{
2392 struct cm_timewait_info *timewait_info;
2393 struct cm_id_private *cm_id_priv;
97f52eb4 2394 __be32 remote_id;
a977049d
HR		 2395
2396 remote_id = rej_msg->local_comm_id;
2397
97f52eb4 2398 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
24be6e81 2399 spin_lock_irq(&cm.lock);
97f52eb4 2400 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 2401 remote_id);
2402 if (!timewait_info) {
24be6e81 2403 spin_unlock_irq(&cm.lock);
a977049d
HR		 2404 return NULL;
2405 }
f06d2653
SH		 2406 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2407 (timewait_info->work.local_id ^
2408 cm.random_id_operand));
a977049d
HR		 2409 if (cm_id_priv) {
2410 if (cm_id_priv->id.remote_id == remote_id)
2411 atomic_inc(&cm_id_priv->refcount);
2412 else
2413 cm_id_priv = NULL;
2414 }
24be6e81 2415 spin_unlock_irq(&cm.lock);
a977049d
HR		 2416 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2417 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2418 else
2419 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2420
2421 return cm_id_priv;
2422}
2423
2424static int cm_rej_handler(struct cm_work *work)
2425{
2426 struct cm_id_private *cm_id_priv;
2427 struct cm_rej_msg *rej_msg;
a977049d
HR		 2428 int ret;
2429
2430 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2431 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2432 if (!cm_id_priv)
2433 return -EINVAL;
2434
2435 cm_format_rej_event(work);
2436
24be6e81 2437 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2438 switch (cm_id_priv->id.state) {
2439 case IB_CM_REQ_SENT:
2440 case IB_CM_MRA_REQ_RCVD:
2441 case IB_CM_REP_SENT:
2442 case IB_CM_MRA_REP_RCVD:
34816ad9 2443 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2444 /* fall through */
2445 case IB_CM_REQ_RCVD:
2446 case IB_CM_MRA_REQ_SENT:
97f52eb4 2447 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2448 cm_enter_timewait(cm_id_priv);
2449 else
2450 cm_reset_to_idle(cm_id_priv);
2451 break;
2452 case IB_CM_DREQ_SENT:
34816ad9 2453 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2454 /* fall through */
2455 case IB_CM_REP_RCVD:
2456 case IB_CM_MRA_REP_SENT:
a977049d
HR		 2457 cm_enter_timewait(cm_id_priv);
2458 break;
8d8ac865
SH		 2459 case IB_CM_ESTABLISHED:
2460 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT ||
2461 cm_id_priv->id.lap_state == IB_CM_LAP_SENT) {
2462 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT)
2463 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2464 cm_id_priv->msg);
2465 cm_enter_timewait(cm_id_priv);
2466 break;
2467 }
2468 /* fall through */
a977049d 2469 default:
24be6e81 2470 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2471 ret = -EINVAL;
2472 goto out;
2473 }
2474
2475 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2476 if (!ret)
2477 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2478 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2479
2480 if (ret)
2481 cm_process_work(cm_id_priv, work);
2482 else
2483 cm_deref_id(cm_id_priv);
2484 return 0;
2485out:
2486 cm_deref_id(cm_id_priv);
2487 return -EINVAL;
2488}
2489
2490int ib_send_cm_mra(struct ib_cm_id *cm_id,
2491 u8 service_timeout,
2492 const void *private_data,
2493 u8 private_data_len)
2494{
2495 struct cm_id_private *cm_id_priv;
2496 struct ib_mad_send_buf *msg;
de98b693
SH		 2497 enum ib_cm_state cm_state;
2498 enum ib_cm_lap_state lap_state;
2499 enum cm_msg_response msg_response;
a977049d
HR		 2500 void *data;
2501 unsigned long flags;
2502 int ret;
2503
2504 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2505 return -EINVAL;
2506
2507 data = cm_copy_private_data(private_data, private_data_len);
2508 if (IS_ERR(data))
2509 return PTR_ERR(data);
2510
2511 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2512
2513 spin_lock_irqsave(&cm_id_priv->lock, flags);
2514 switch(cm_id_priv->id.state) {
2515 case IB_CM_REQ_RCVD:
de98b693
SH		 2516 cm_state = IB_CM_MRA_REQ_SENT;
2517 lap_state = cm_id->lap_state;
2518 msg_response = CM_MSG_RESPONSE_REQ;
a977049d
HR		 2519 break;
2520 case IB_CM_REP_RCVD:
de98b693
SH		 2521 cm_state = IB_CM_MRA_REP_SENT;
2522 lap_state = cm_id->lap_state;
2523 msg_response = CM_MSG_RESPONSE_REP;
a977049d
HR		 2524 break;
2525 case IB_CM_ESTABLISHED:
50a025c6
SH		 2526 if (cm_id->lap_state == IB_CM_LAP_RCVD) {
2527 cm_state = cm_id->state;
2528 lap_state = IB_CM_MRA_LAP_SENT;
2529 msg_response = CM_MSG_RESPONSE_OTHER;
2530 break;
2531 }
de98b693
SH		 2532 default:
2533 ret = -EINVAL;
2534 goto error1;
2535 }
2536
2537 if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) {
a977049d
HR		 2538 ret = cm_alloc_msg(cm_id_priv, &msg);
2539 if (ret)
2540 goto error1;
2541
2542 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
de98b693 2543 msg_response, service_timeout,
a977049d 2544 private_data, private_data_len);
34816ad9 2545 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2546 if (ret)
2547 goto error2;
a977049d 2548 }
de98b693
SH		 2549
2550 cm_id->state = cm_state;
2551 cm_id->lap_state = lap_state;
a977049d
HR		 2552 cm_id_priv->service_timeout = service_timeout;
2553 cm_set_private_data(cm_id_priv, data, private_data_len);
2554 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2555 return 0;
2556
2557error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2558 kfree(data);
2559 return ret;
2560
2561error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2562 kfree(data);
2563 cm_free_msg(msg);
2564 return ret;
2565}
2566EXPORT_SYMBOL(ib_send_cm_mra);
2567
2568static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2569{
2570 switch (cm_mra_get_msg_mraed(mra_msg)) {
2571 case CM_MSG_RESPONSE_REQ:
2572 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2573 case CM_MSG_RESPONSE_REP:
2574 case CM_MSG_RESPONSE_OTHER:
2575 return cm_acquire_id(mra_msg->remote_comm_id,
2576 mra_msg->local_comm_id);
2577 default:
2578 return NULL;
2579 }
2580}
2581
2582static int cm_mra_handler(struct cm_work *work)
2583{
2584 struct cm_id_private *cm_id_priv;
2585 struct cm_mra_msg *mra_msg;
a977049d
HR		 2586 int timeout, ret;
2587
2588 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2589 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2590 if (!cm_id_priv)
2591 return -EINVAL;
2592
2593 work->cm_event.private_data = &mra_msg->private_data;
2594 work->cm_event.param.mra_rcvd.service_timeout =
2595 cm_mra_get_service_timeout(mra_msg);
2596 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
1d846126 2597 cm_convert_to_ms(cm_id_priv->av.timeout);
a977049d 2598
24be6e81 2599 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2600 switch (cm_id_priv->id.state) {
2601 case IB_CM_REQ_SENT:
2602 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2603 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2604 cm_id_priv->msg, timeout))
a977049d
HR		 2605 goto out;
2606 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2607 break;
2608 case IB_CM_REP_SENT:
2609 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2610 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2611 cm_id_priv->msg, timeout))
a977049d
HR		 2612 goto out;
2613 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2614 break;
2615 case IB_CM_ESTABLISHED:
2616 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2617 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2618 ib_modify_mad(cm_id_priv->av.port->mad_agent,
9af57b7a
SH		 2619 cm_id_priv->msg, timeout)) {
2620 if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2621 atomic_long_inc(&work->port->
2622 counter_group[CM_RECV_DUPLICATES].
2623 counter[CM_MRA_COUNTER]);
a977049d 2624 goto out;
9af57b7a 2625 }
a977049d
HR		 2626 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2627 break;
9af57b7a
SH		 2628 case IB_CM_MRA_REQ_RCVD:
2629 case IB_CM_MRA_REP_RCVD:
2630 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2631 counter[CM_MRA_COUNTER]);
2632 /* fall through */
a977049d
HR		 2633 default:
2634 goto out;
2635 }
2636
2637 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2638 cm_id_priv->id.state;
2639 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2640 if (!ret)
2641 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2642 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2643
2644 if (ret)
2645 cm_process_work(cm_id_priv, work);
2646 else
2647 cm_deref_id(cm_id_priv);
2648 return 0;
2649out:
24be6e81 2650 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2651 cm_deref_id(cm_id_priv);
2652 return -EINVAL;
2653}
2654
2655static void cm_format_lap(struct cm_lap_msg *lap_msg,
2656 struct cm_id_private *cm_id_priv,
2657 struct ib_sa_path_rec *alternate_path,
2658 const void *private_data,
2659 u8 private_data_len)
2660{
2661 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2662 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2663 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2664 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2665 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2666 /* todo: need remote CM response timeout */
2667 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2668 lap_msg->alt_local_lid = alternate_path->slid;
2669 lap_msg->alt_remote_lid = alternate_path->dlid;
2670 lap_msg->alt_local_gid = alternate_path->sgid;
2671 lap_msg->alt_remote_gid = alternate_path->dgid;
2672 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2673 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2674 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2675 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2676 cm_lap_set_sl(lap_msg, alternate_path->sl);
2677 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2678 cm_lap_set_local_ack_timeout(lap_msg,
1d846126
SH		 2679 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
2680 alternate_path->packet_life_time));
a977049d
HR		 2681
2682 if (private_data && private_data_len)
2683 memcpy(lap_msg->private_data, private_data, private_data_len);
2684}
2685
2686int ib_send_cm_lap(struct ib_cm_id *cm_id,
2687 struct ib_sa_path_rec *alternate_path,
2688 const void *private_data,
2689 u8 private_data_len)
2690{
2691 struct cm_id_private *cm_id_priv;
2692 struct ib_mad_send_buf *msg;
a977049d
HR		 2693 unsigned long flags;
2694 int ret;
2695
2696 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2697 return -EINVAL;
2698
2699 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2700 spin_lock_irqsave(&cm_id_priv->lock, flags);
2701 if (cm_id->state != IB_CM_ESTABLISHED ||
e1444b5a
SH		 2702 (cm_id->lap_state != IB_CM_LAP_UNINIT &&
2703 cm_id->lap_state != IB_CM_LAP_IDLE)) {
a977049d
HR		 2704 ret = -EINVAL;
2705 goto out;
2706 }
2707
e1444b5a
SH		 2708 ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av);
2709 if (ret)
2710 goto out;
1d846126
SH		 2711 cm_id_priv->alt_av.timeout =
2712 cm_ack_timeout(cm_id_priv->target_ack_delay,
2713 cm_id_priv->alt_av.timeout - 1);
e1444b5a 2714
a977049d
HR		 2715 ret = cm_alloc_msg(cm_id_priv, &msg);
2716 if (ret)
2717 goto out;
2718
2719 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2720 alternate_path, private_data, private_data_len);
34816ad9 2721 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2722 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2723
34816ad9 2724 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2725 if (ret) {
2726 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2727 cm_free_msg(msg);
2728 return ret;
2729 }
2730
2731 cm_id->lap_state = IB_CM_LAP_SENT;
2732 cm_id_priv->msg = msg;
2733
2734out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2735 return ret;
2736}
2737EXPORT_SYMBOL(ib_send_cm_lap);
2738
e1444b5a
SH		 2739static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
2740 struct ib_sa_path_rec *path,
a977049d
HR		 2741 struct cm_lap_msg *lap_msg)
2742{
2743 memset(path, 0, sizeof *path);
2744 path->dgid = lap_msg->alt_local_gid;
2745 path->sgid = lap_msg->alt_remote_gid;
2746 path->dlid = lap_msg->alt_local_lid;
2747 path->slid = lap_msg->alt_remote_lid;
2748 path->flow_label = cm_lap_get_flow_label(lap_msg);
2749 path->hop_limit = lap_msg->alt_hop_limit;
2750 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2751 path->reversible = 1;
e1444b5a 2752 path->pkey = cm_id_priv->pkey;
a977049d
HR		 2753 path->sl = cm_lap_get_sl(lap_msg);
2754 path->mtu_selector = IB_SA_EQ;
e1444b5a 2755 path->mtu = cm_id_priv->path_mtu;
a977049d
HR		 2756 path->rate_selector = IB_SA_EQ;
2757 path->rate = cm_lap_get_packet_rate(lap_msg);
2758 path->packet_life_time_selector = IB_SA_EQ;
2759 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2760 path->packet_life_time -= (path->packet_life_time > 0);
2761}
2762
2763static int cm_lap_handler(struct cm_work *work)
2764{
2765 struct cm_id_private *cm_id_priv;
2766 struct cm_lap_msg *lap_msg;
2767 struct ib_cm_lap_event_param *param;
2768 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2769 int ret;
2770
2771 /* todo: verify LAP request and send reject APR if invalid. */
2772 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2773 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2774 lap_msg->local_comm_id);
2775 if (!cm_id_priv)
2776 return -EINVAL;
2777
2778 param = &work->cm_event.param.lap_rcvd;
2779 param->alternate_path = &work->path[0];
e1444b5a 2780 cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
a977049d
HR		 2781 work->cm_event.private_data = &lap_msg->private_data;
2782
24be6e81 2783 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2784 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2785 goto unlock;
2786
2787 switch (cm_id_priv->id.lap_state) {
e1444b5a 2788 case IB_CM_LAP_UNINIT:
a977049d
HR		 2789 case IB_CM_LAP_IDLE:
2790 break;
2791 case IB_CM_MRA_LAP_SENT:
9af57b7a
SH		 2792 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2793 counter[CM_LAP_COUNTER]);
a977049d
HR		 2794 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2795 goto unlock;
2796
2797 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2798 CM_MSG_RESPONSE_OTHER,
2799 cm_id_priv->service_timeout,
2800 cm_id_priv->private_data,
2801 cm_id_priv->private_data_len);
24be6e81 2802 spin_unlock_irq(&cm_id_priv->lock);
a977049d 2803
34816ad9 2804 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2805 cm_free_msg(msg);
2806 goto deref;
9af57b7a
SH		 2807 case IB_CM_LAP_RCVD:
2808 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2809 counter[CM_LAP_COUNTER]);
2810 goto unlock;
a977049d
HR		 2811 default:
2812 goto unlock;
2813 }
2814
2815 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2816 cm_id_priv->tid = lap_msg->hdr.tid;
e1444b5a
SH		 2817 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2818 work->mad_recv_wc->recv_buf.grh,
2819 &cm_id_priv->av);
2820 cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av);
a977049d
HR		 2821 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2822 if (!ret)
2823 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2824 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2825
2826 if (ret)
2827 cm_process_work(cm_id_priv, work);
2828 else
2829 cm_deref_id(cm_id_priv);
2830 return 0;
2831
24be6e81 2832unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2833deref: cm_deref_id(cm_id_priv);
2834 return -EINVAL;
2835}
2836
2837static void cm_format_apr(struct cm_apr_msg *apr_msg,
2838 struct cm_id_private *cm_id_priv,
2839 enum ib_cm_apr_status status,
2840 void *info,
2841 u8 info_length,
2842 const void *private_data,
2843 u8 private_data_len)
2844{
2845 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2846 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2847 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2848 apr_msg->ap_status = (u8) status;
2849
2850 if (info && info_length) {
2851 apr_msg->info_length = info_length;
2852 memcpy(apr_msg->info, info, info_length);
2853 }
2854
2855 if (private_data && private_data_len)
2856 memcpy(apr_msg->private_data, private_data, private_data_len);
2857}
2858
2859int ib_send_cm_apr(struct ib_cm_id *cm_id,
2860 enum ib_cm_apr_status status,
2861 void *info,
2862 u8 info_length,
2863 const void *private_data,
2864 u8 private_data_len)
2865{
2866 struct cm_id_private *cm_id_priv;
2867 struct ib_mad_send_buf *msg;
a977049d
HR		 2868 unsigned long flags;
2869 int ret;
2870
2871 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2872 (info && info_length > IB_CM_APR_INFO_LENGTH))
2873 return -EINVAL;
2874
2875 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2876 spin_lock_irqsave(&cm_id_priv->lock, flags);
2877 if (cm_id->state != IB_CM_ESTABLISHED ||
2878 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2879 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2880 ret = -EINVAL;
2881 goto out;
2882 }
2883
2884 ret = cm_alloc_msg(cm_id_priv, &msg);
2885 if (ret)
2886 goto out;
2887
2888 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2889 info, info_length, private_data, private_data_len);
34816ad9 2890 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2891 if (ret) {
2892 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2893 cm_free_msg(msg);
2894 return ret;
2895 }
2896
2897 cm_id->lap_state = IB_CM_LAP_IDLE;
2898out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2899 return ret;
2900}
2901EXPORT_SYMBOL(ib_send_cm_apr);
2902
2903static int cm_apr_handler(struct cm_work *work)
2904{
2905 struct cm_id_private *cm_id_priv;
2906 struct cm_apr_msg *apr_msg;
a977049d
HR		 2907 int ret;
2908
2909 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2910 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2911 apr_msg->local_comm_id);
2912 if (!cm_id_priv)
2913 return -EINVAL; /* Unmatched reply. */
2914
2915 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2916 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2917 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2918 work->cm_event.private_data = &apr_msg->private_data;
2919
24be6e81 2920 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2921 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2922 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2923 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
24be6e81 2924 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2925 goto out;
2926 }
2927 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
34816ad9 2928 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2929 cm_id_priv->msg = NULL;
2930
2931 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2932 if (!ret)
2933 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2934 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2935
2936 if (ret)
2937 cm_process_work(cm_id_priv, work);
2938 else
2939 cm_deref_id(cm_id_priv);
2940 return 0;
2941out:
2942 cm_deref_id(cm_id_priv);
2943 return -EINVAL;
2944}
2945
2946static int cm_timewait_handler(struct cm_work *work)
2947{
2948 struct cm_timewait_info *timewait_info;
2949 struct cm_id_private *cm_id_priv;
a977049d
HR		 2950 int ret;
2951
2952 timewait_info = (struct cm_timewait_info *)work;
8575329d
SH		 2953 spin_lock_irq(&cm.lock);
2954 list_del(&timewait_info->list);
2955 spin_unlock_irq(&cm.lock);
a977049d
HR		 2956
2957 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2958 timewait_info->work.remote_id);
2959 if (!cm_id_priv)
2960 return -EINVAL;
2961
8575329d 2962 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2963 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2964 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
8575329d 2965 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2966 goto out;
2967 }
2968 cm_id_priv->id.state = IB_CM_IDLE;
2969 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2970 if (!ret)
2971 list_add_tail(&work->list, &cm_id_priv->work_list);
8575329d 2972 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2973
2974 if (ret)
2975 cm_process_work(cm_id_priv, work);
2976 else
2977 cm_deref_id(cm_id_priv);
2978 return 0;
2979out:
2980 cm_deref_id(cm_id_priv);
2981 return -EINVAL;
2982}
2983
2984static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2985 struct cm_id_private *cm_id_priv,
2986 struct ib_cm_sidr_req_param *param)
2987{
2988 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2989 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2990 sidr_req_msg->request_id = cm_id_priv->id.local_id;
a88f4888 2991 sidr_req_msg->pkey = param->path->pkey;
a977049d
HR		 2992 sidr_req_msg->service_id = param->service_id;
2993
2994 if (param->private_data && param->private_data_len)
2995 memcpy(sidr_req_msg->private_data, param->private_data,
2996 param->private_data_len);
2997}
2998
2999int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
3000 struct ib_cm_sidr_req_param *param)
3001{
3002 struct cm_id_private *cm_id_priv;
3003 struct ib_mad_send_buf *msg;
a977049d
HR		 3004 unsigned long flags;
3005 int ret;
3006
3007 if (!param->path || (param->private_data &&
3008 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
3009 return -EINVAL;
3010
3011 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3012 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
3013 if (ret)
3014 goto out;
3015
3016 cm_id->service_id = param->service_id;
9c3da099 3017 cm_id->service_mask = ~cpu_to_be64(0);
a977049d
HR		 3018 cm_id_priv->timeout_ms = param->timeout_ms;
3019 cm_id_priv->max_cm_retries = param->max_cm_retries;
3020 ret = cm_alloc_msg(cm_id_priv, &msg);
3021 if (ret)
3022 goto out;
3023
3024 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
3025 param);
34816ad9 3026 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 3027 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
3028
3029 spin_lock_irqsave(&cm_id_priv->lock, flags);
3030 if (cm_id->state == IB_CM_IDLE)
34816ad9 3031 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 3032 else
3033 ret = -EINVAL;
3034
3035 if (ret) {
3036 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3037 cm_free_msg(msg);
3038 goto out;
3039 }
3040 cm_id->state = IB_CM_SIDR_REQ_SENT;
3041 cm_id_priv->msg = msg;
3042 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3043out:
3044 return ret;
3045}
3046EXPORT_SYMBOL(ib_send_cm_sidr_req);
3047
3048static void cm_format_sidr_req_event(struct cm_work *work,
3049 struct ib_cm_id *listen_id)
3050{
3051 struct cm_sidr_req_msg *sidr_req_msg;
3052 struct ib_cm_sidr_req_event_param *param;
3053
3054 sidr_req_msg = (struct cm_sidr_req_msg *)
3055 work->mad_recv_wc->recv_buf.mad;
3056 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 3057 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 3058 param->listen_id = listen_id;
15865e7d 3059 param->service_id = sidr_req_msg->service_id;
24cad9a7 3060 param->bth_pkey = cm_get_bth_pkey(work);
a977049d
HR		 3061 param->port = work->port->port_num;
3062 work->cm_event.private_data = &sidr_req_msg->private_data;
3063}
3064
3065static int cm_sidr_req_handler(struct cm_work *work)
3066{
3067 struct ib_cm_id *cm_id;
3068 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
3069 struct cm_sidr_req_msg *sidr_req_msg;
3070 struct ib_wc *wc;
a977049d 3071
d4c4196f 3072 cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
a977049d
HR		 3073 if (IS_ERR(cm_id))
3074 return PTR_ERR(cm_id);
3075 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3076
3077 /* Record SGID/SLID and request ID for lookup. */
3078 sidr_req_msg = (struct cm_sidr_req_msg *)
3079 work->mad_recv_wc->recv_buf.mad;
3080 wc = work->mad_recv_wc->wc;
97f52eb4 3081 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 3082 cm_id_priv->av.dgid.global.interface_id = 0;
3083 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 3084 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 3085 &cm_id_priv->av);
3086 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
a977049d
HR		 3087 cm_id_priv->tid = sidr_req_msg->hdr.tid;
3088 atomic_inc(&cm_id_priv->work_count);
3089
24be6e81 3090 spin_lock_irq(&cm.lock);
a977049d
HR		 3091 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
3092 if (cur_cm_id_priv) {
24be6e81 3093 spin_unlock_irq(&cm.lock);
9af57b7a
SH		 3094 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
3095 counter[CM_SIDR_REQ_COUNTER]);
a977049d
HR		 3096 goto out; /* Duplicate message. */
3097 }
29c2731c 3098 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
07d357d0 3099 cur_cm_id_priv = cm_find_listen(cm_id->device,
73fec7fd 3100 sidr_req_msg->service_id);
a977049d 3101 if (!cur_cm_id_priv) {
24be6e81 3102 spin_unlock_irq(&cm.lock);
6164c8cd 3103 cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED);
a977049d
HR		 3104 goto out; /* No match. */
3105 }
3106 atomic_inc(&cur_cm_id_priv->refcount);
29963437 3107 atomic_inc(&cm_id_priv->refcount);
24be6e81 3108 spin_unlock_irq(&cm.lock);
a977049d
HR		 3109
3110 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
3111 cm_id_priv->id.context = cur_cm_id_priv->id.context;
3112 cm_id_priv->id.service_id = sidr_req_msg->service_id;
9c3da099 3113 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
a977049d
HR		 3114
3115 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
3116 cm_process_work(cm_id_priv, work);
3117 cm_deref_id(cur_cm_id_priv);
3118 return 0;
3119out:
3120 ib_destroy_cm_id(&cm_id_priv->id);
3121 return -EINVAL;
3122}
3123
3124static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
3125 struct cm_id_private *cm_id_priv,
3126 struct ib_cm_sidr_rep_param *param)
3127{
3128 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
3129 cm_id_priv->tid);
3130 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
3131 sidr_rep_msg->status = param->status;
3132 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
3133 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
3134 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
3135
3136 if (param->info && param->info_length)
3137 memcpy(sidr_rep_msg->info, param->info, param->info_length);
3138
3139 if (param->private_data && param->private_data_len)
3140 memcpy(sidr_rep_msg->private_data, param->private_data,
3141 param->private_data_len);
3142}
3143
3144int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
3145 struct ib_cm_sidr_rep_param *param)
3146{
3147 struct cm_id_private *cm_id_priv;
3148 struct ib_mad_send_buf *msg;
a977049d
HR		 3149 unsigned long flags;
3150 int ret;
3151
3152 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
3153 (param->private_data &&
3154 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
3155 return -EINVAL;
3156
3157 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3158 spin_lock_irqsave(&cm_id_priv->lock, flags);
3159 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
3160 ret = -EINVAL;
3161 goto error;
3162 }
3163
3164 ret = cm_alloc_msg(cm_id_priv, &msg);
3165 if (ret)
3166 goto error;
3167
3168 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
3169 param);
34816ad9 3170 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 3171 if (ret) {
3172 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3173 cm_free_msg(msg);
3174 return ret;
3175 }
3176 cm_id->state = IB_CM_IDLE;
3177 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3178
3179 spin_lock_irqsave(&cm.lock, flags);
0ca81a28
DT		 3180 if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) {
3181 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
3182 RB_CLEAR_NODE(&cm_id_priv->sidr_id_node);
3183 }
a977049d
HR		 3184 spin_unlock_irqrestore(&cm.lock, flags);
3185 return 0;
3186
3187error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3188 return ret;
3189}
3190EXPORT_SYMBOL(ib_send_cm_sidr_rep);
3191
3192static void cm_format_sidr_rep_event(struct cm_work *work)
3193{
3194 struct cm_sidr_rep_msg *sidr_rep_msg;
3195 struct ib_cm_sidr_rep_event_param *param;
3196
3197 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3198 work->mad_recv_wc->recv_buf.mad;
3199 param = &work->cm_event.param.sidr_rep_rcvd;
3200 param->status = sidr_rep_msg->status;
3201 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
3202 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
3203 param->info = &sidr_rep_msg->info;
3204 param->info_len = sidr_rep_msg->info_length;
3205 work->cm_event.private_data = &sidr_rep_msg->private_data;
3206}
3207
3208static int cm_sidr_rep_handler(struct cm_work *work)
3209{
3210 struct cm_sidr_rep_msg *sidr_rep_msg;
3211 struct cm_id_private *cm_id_priv;
a977049d
HR		 3212
3213 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3214 work->mad_recv_wc->recv_buf.mad;
3215 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
3216 if (!cm_id_priv)
3217 return -EINVAL; /* Unmatched reply. */
3218
24be6e81 3219 spin_lock_irq(&cm_id_priv->lock);
a977049d 3220 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
24be6e81 3221 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3222 goto out;
3223 }
3224 cm_id_priv->id.state = IB_CM_IDLE;
34816ad9 3225 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
24be6e81 3226 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3227
3228 cm_format_sidr_rep_event(work);
3229 cm_process_work(cm_id_priv, work);
3230 return 0;
3231out:
3232 cm_deref_id(cm_id_priv);
3233 return -EINVAL;
3234}
3235
3236static void cm_process_send_error(struct ib_mad_send_buf *msg,
3237 enum ib_wc_status wc_status)
3238{
3239 struct cm_id_private *cm_id_priv;
3240 struct ib_cm_event cm_event;
3241 enum ib_cm_state state;
a977049d
HR		 3242 int ret;
3243
3244 memset(&cm_event, 0, sizeof cm_event);
3245 cm_id_priv = msg->context[0];
3246
3247 /* Discard old sends or ones without a response. */
24be6e81 3248 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 3249 state = (enum ib_cm_state) (unsigned long) msg->context[1];
3250 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
3251 goto discard;
3252
3253 switch (state) {
3254 case IB_CM_REQ_SENT:
3255 case IB_CM_MRA_REQ_RCVD:
3256 cm_reset_to_idle(cm_id_priv);
3257 cm_event.event = IB_CM_REQ_ERROR;
3258 break;
3259 case IB_CM_REP_SENT:
3260 case IB_CM_MRA_REP_RCVD:
3261 cm_reset_to_idle(cm_id_priv);
3262 cm_event.event = IB_CM_REP_ERROR;
3263 break;
3264 case IB_CM_DREQ_SENT:
3265 cm_enter_timewait(cm_id_priv);
3266 cm_event.event = IB_CM_DREQ_ERROR;
3267 break;
3268 case IB_CM_SIDR_REQ_SENT:
3269 cm_id_priv->id.state = IB_CM_IDLE;
3270 cm_event.event = IB_CM_SIDR_REQ_ERROR;
3271 break;
3272 default:
3273 goto discard;
3274 }
24be6e81 3275 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3276 cm_event.param.send_status = wc_status;
3277
3278 /* No other events can occur on the cm_id at this point. */
3279 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
3280 cm_free_msg(msg);
3281 if (ret)
3282 ib_destroy_cm_id(&cm_id_priv->id);
3283 return;
3284discard:
24be6e81 3285 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3286 cm_free_msg(msg);
3287}
3288
3289static void cm_send_handler(struct ib_mad_agent *mad_agent,
3290 struct ib_mad_send_wc *mad_send_wc)
3291{
34816ad9 3292 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
9af57b7a
SH		 3293 struct cm_port *port;
3294 u16 attr_index;
3295
3296 port = mad_agent->context;
3297 attr_index = be16_to_cpu(((struct ib_mad_hdr *)
3298 msg->mad)->attr_id) - CM_ATTR_ID_OFFSET;
3299
3300 /*
3301 * If the send was in response to a received message (context[0] is not
3302 * set to a cm_id), and is not a REJ, then it is a send that was
3303 * manually retried.
3304 */
3305 if (!msg->context[0] && (attr_index != CM_REJ_COUNTER))
3306 msg->retries = 1;
3307
3308 atomic_long_add(1 + msg->retries,
3309 &port->counter_group[CM_XMIT].counter[attr_index]);
3310 if (msg->retries)
3311 atomic_long_add(msg->retries,
3312 &port->counter_group[CM_XMIT_RETRIES].
3313 counter[attr_index]);
a977049d
HR		 3314
3315 switch (mad_send_wc->status) {
3316 case IB_WC_SUCCESS:
3317 case IB_WC_WR_FLUSH_ERR:
3318 cm_free_msg(msg);
3319 break;
3320 default:
3321 if (msg->context[0] && msg->context[1])
3322 cm_process_send_error(msg, mad_send_wc->status);
3323 else
3324 cm_free_msg(msg);
3325 break;
3326 }
3327}
3328
c4028958 3329static void cm_work_handler(struct work_struct *_work)
a977049d 3330{
c4028958 3331 struct cm_work *work = container_of(_work, struct cm_work, work.work);
a977049d
HR		 3332 int ret;
3333
3334 switch (work->cm_event.event) {
3335 case IB_CM_REQ_RECEIVED:
3336 ret = cm_req_handler(work);
3337 break;
3338 case IB_CM_MRA_RECEIVED:
3339 ret = cm_mra_handler(work);
3340 break;
3341 case IB_CM_REJ_RECEIVED:
3342 ret = cm_rej_handler(work);
3343 break;
3344 case IB_CM_REP_RECEIVED:
3345 ret = cm_rep_handler(work);
3346 break;
3347 case IB_CM_RTU_RECEIVED:
3348 ret = cm_rtu_handler(work);
3349 break;
3350 case IB_CM_USER_ESTABLISHED:
3351 ret = cm_establish_handler(work);
3352 break;
3353 case IB_CM_DREQ_RECEIVED:
3354 ret = cm_dreq_handler(work);
3355 break;
3356 case IB_CM_DREP_RECEIVED:
3357 ret = cm_drep_handler(work);
3358 break;
3359 case IB_CM_SIDR_REQ_RECEIVED:
3360 ret = cm_sidr_req_handler(work);
3361 break;
3362 case IB_CM_SIDR_REP_RECEIVED:
3363 ret = cm_sidr_rep_handler(work);
3364 break;
3365 case IB_CM_LAP_RECEIVED:
3366 ret = cm_lap_handler(work);
3367 break;
3368 case IB_CM_APR_RECEIVED:
3369 ret = cm_apr_handler(work);
3370 break;
3371 case IB_CM_TIMEWAIT_EXIT:
3372 ret = cm_timewait_handler(work);
3373 break;
3374 default:
3375 ret = -EINVAL;
3376 break;
3377 }
3378 if (ret)
3379 cm_free_work(work);
3380}
3381
e1444b5a 3382static int cm_establish(struct ib_cm_id *cm_id)
a977049d
HR		 3383{
3384 struct cm_id_private *cm_id_priv;
3385 struct cm_work *work;
3386 unsigned long flags;
3387 int ret = 0;
be4b4993
ES		 3388 struct cm_device *cm_dev;
3389
3390 cm_dev = ib_get_client_data(cm_id->device, &cm_client);
3391 if (!cm_dev)
3392 return -ENODEV;
a977049d
HR		 3393
3394 work = kmalloc(sizeof *work, GFP_ATOMIC);
3395 if (!work)
3396 return -ENOMEM;
3397
3398 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3399 spin_lock_irqsave(&cm_id_priv->lock, flags);
3400 switch (cm_id->state)
3401 {
3402 case IB_CM_REP_SENT:
3403 case IB_CM_MRA_REP_RCVD:
3404 cm_id->state = IB_CM_ESTABLISHED;
3405 break;
3406 case IB_CM_ESTABLISHED:
3407 ret = -EISCONN;
3408 break;
3409 default:
3410 ret = -EINVAL;
3411 break;
3412 }
3413 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3414
3415 if (ret) {
3416 kfree(work);
3417 goto out;
3418 }
3419
3420 /*
3421 * The CM worker thread may try to destroy the cm_id before it
3422 * can execute this work item. To prevent potential deadlock,
3423 * we need to find the cm_id once we're in the context of the
3424 * worker thread, rather than holding a reference on it.
3425 */
c4028958 3426 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 3427 work->local_id = cm_id->local_id;
3428 work->remote_id = cm_id->remote_id;
3429 work->mad_recv_wc = NULL;
3430 work->cm_event.event = IB_CM_USER_ESTABLISHED;
be4b4993
ES		 3431
3432 /* Check if the device started its remove_one */
3433 spin_lock_irq(&cm.lock);
3434 if (!cm_dev->going_down) {
3435 queue_delayed_work(cm.wq, &work->work, 0);
3436 } else {
3437 kfree(work);
3438 ret = -ENODEV;
3439 }
3440 spin_unlock_irq(&cm.lock);
3441
a977049d
HR		 3442out:
3443 return ret;
3444}
e1444b5a
SH		 3445
3446static int cm_migrate(struct ib_cm_id *cm_id)
3447{
3448 struct cm_id_private *cm_id_priv;
3449 unsigned long flags;
3450 int ret = 0;
3451
3452 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3453 spin_lock_irqsave(&cm_id_priv->lock, flags);
3454 if (cm_id->state == IB_CM_ESTABLISHED &&
3455 (cm_id->lap_state == IB_CM_LAP_UNINIT ||
3456 cm_id->lap_state == IB_CM_LAP_IDLE)) {
3457 cm_id->lap_state = IB_CM_LAP_IDLE;
3458 cm_id_priv->av = cm_id_priv->alt_av;
3459 } else
3460 ret = -EINVAL;
3461 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3462
3463 return ret;
3464}
3465
3466int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
3467{
3468 int ret;
3469
3470 switch (event) {
3471 case IB_EVENT_COMM_EST:
3472 ret = cm_establish(cm_id);
3473 break;
3474 case IB_EVENT_PATH_MIG:
3475 ret = cm_migrate(cm_id);
3476 break;
3477 default:
3478 ret = -EINVAL;
3479 }
3480 return ret;
3481}
3482EXPORT_SYMBOL(ib_cm_notify);
a977049d
HR		 3483
3484static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3485 struct ib_mad_recv_wc *mad_recv_wc)
3486{
9af57b7a 3487 struct cm_port *port = mad_agent->context;
a977049d
HR		 3488 struct cm_work *work;
3489 enum ib_cm_event_type event;
9af57b7a 3490 u16 attr_id;
a977049d 3491 int paths = 0;
be4b4993 3492 int going_down = 0;
a977049d
HR		 3493
3494 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3495 case CM_REQ_ATTR_ID:
3496 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3497 alt_local_lid != 0);
3498 event = IB_CM_REQ_RECEIVED;
3499 break;
3500 case CM_MRA_ATTR_ID:
3501 event = IB_CM_MRA_RECEIVED;
3502 break;
3503 case CM_REJ_ATTR_ID:
3504 event = IB_CM_REJ_RECEIVED;
3505 break;
3506 case CM_REP_ATTR_ID:
3507 event = IB_CM_REP_RECEIVED;
3508 break;
3509 case CM_RTU_ATTR_ID:
3510 event = IB_CM_RTU_RECEIVED;
3511 break;
3512 case CM_DREQ_ATTR_ID:
3513 event = IB_CM_DREQ_RECEIVED;
3514 break;
3515 case CM_DREP_ATTR_ID:
3516 event = IB_CM_DREP_RECEIVED;
3517 break;
3518 case CM_SIDR_REQ_ATTR_ID:
3519 event = IB_CM_SIDR_REQ_RECEIVED;
3520 break;
3521 case CM_SIDR_REP_ATTR_ID:
3522 event = IB_CM_SIDR_REP_RECEIVED;
3523 break;
3524 case CM_LAP_ATTR_ID:
3525 paths = 1;
3526 event = IB_CM_LAP_RECEIVED;
3527 break;
3528 case CM_APR_ATTR_ID:
3529 event = IB_CM_APR_RECEIVED;
3530 break;
3531 default:
3532 ib_free_recv_mad(mad_recv_wc);
3533 return;
3534 }
3535
9af57b7a
SH		 3536 attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id);
3537 atomic_long_inc(&port->counter_group[CM_RECV].
3538 counter[attr_id - CM_ATTR_ID_OFFSET]);
3539
a977049d
HR		 3540 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3541 GFP_KERNEL);
3542 if (!work) {
3543 ib_free_recv_mad(mad_recv_wc);
3544 return;
3545 }
3546
c4028958 3547 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 3548 work->cm_event.event = event;
3549 work->mad_recv_wc = mad_recv_wc;
9af57b7a 3550 work->port = port;
be4b4993
ES		 3551
3552 /* Check if the device started its remove_one */
3553 spin_lock_irq(&cm.lock);
3554 if (!port->cm_dev->going_down)
3555 queue_delayed_work(cm.wq, &work->work, 0);
3556 else
3557 going_down = 1;
3558 spin_unlock_irq(&cm.lock);
3559
3560 if (going_down) {
3561 kfree(work);
3562 ib_free_recv_mad(mad_recv_wc);
3563 }
a977049d
HR		 3564}
3565
3566static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3567 struct ib_qp_attr *qp_attr,
3568 int *qp_attr_mask)
3569{
3570 unsigned long flags;
3571 int ret;
3572
3573 spin_lock_irqsave(&cm_id_priv->lock, flags);
3574 switch (cm_id_priv->id.state) {
3575 case IB_CM_REQ_SENT:
3576 case IB_CM_MRA_REQ_RCVD:
3577 case IB_CM_REQ_RCVD:
3578 case IB_CM_MRA_REQ_SENT:
3579 case IB_CM_REP_RCVD:
3580 case IB_CM_MRA_REP_SENT:
3581 case IB_CM_REP_SENT:
3582 case IB_CM_MRA_REP_RCVD:
3583 case IB_CM_ESTABLISHED:
3584 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3585 IB_QP_PKEY_INDEX | IB_QP_PORT;
e31353ea 3586 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
a977049d 3587 if (cm_id_priv->responder_resources)
c1f250c0
SH		 3588 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3589 IB_ACCESS_REMOTE_ATOMIC;
a977049d
HR		 3590 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3591 qp_attr->port_num = cm_id_priv->av.port->port_num;
3592 ret = 0;
3593 break;
3594 default:
3595 ret = -EINVAL;
3596 break;
3597 }
3598 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3599 return ret;
3600}
3601
3602static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3603 struct ib_qp_attr *qp_attr,
3604 int *qp_attr_mask)
3605{
3606 unsigned long flags;
3607 int ret;
3608
3609 spin_lock_irqsave(&cm_id_priv->lock, flags);
3610 switch (cm_id_priv->id.state) {
3611 case IB_CM_REQ_RCVD:
3612 case IB_CM_MRA_REQ_SENT:
3613 case IB_CM_REP_RCVD:
3614 case IB_CM_MRA_REP_SENT:
3615 case IB_CM_REP_SENT:
3616 case IB_CM_MRA_REP_RCVD:
3617 case IB_CM_ESTABLISHED:
3618 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 3619 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d
HR		 3620 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3621 qp_attr->path_mtu = cm_id_priv->path_mtu;
3622 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3623 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
d26a360b
SH		 3624 if (cm_id_priv->qp_type == IB_QPT_RC ||
3625 cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
ae7971a7
SH		 3626 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3627 IB_QP_MIN_RNR_TIMER;
3628 qp_attr->max_dest_rd_atomic =
3629 cm_id_priv->responder_resources;
3630 qp_attr->min_rnr_timer = 0;
3631 }
a977049d
HR		 3632 if (cm_id_priv->alt_av.ah_attr.dlid) {
3633 *qp_attr_mask |= IB_QP_ALT_PATH;
0d8fdfd7 3634 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
e1444b5a 3635 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
1d846126 3636 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
a977049d
HR		 3637 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3638 }
3639 ret = 0;
3640 break;
3641 default:
3642 ret = -EINVAL;
3643 break;
3644 }
3645 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3646 return ret;
3647}
3648
3649static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3650 struct ib_qp_attr *qp_attr,
3651 int *qp_attr_mask)
3652{
3653 unsigned long flags;
3654 int ret;
3655
3656 spin_lock_irqsave(&cm_id_priv->lock, flags);
3657 switch (cm_id_priv->id.state) {
0fe313b0
SH		 3658 /* Allow transition to RTS before sending REP */
3659 case IB_CM_REQ_RCVD:
3660 case IB_CM_MRA_REQ_SENT:
3661
a977049d
HR		 3662 case IB_CM_REP_RCVD:
3663 case IB_CM_MRA_REP_SENT:
3664 case IB_CM_REP_SENT:
3665 case IB_CM_MRA_REP_RCVD:
3666 case IB_CM_ESTABLISHED:
e1444b5a
SH		 3667 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
3668 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
3669 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
d26a360b
SH		 3670 switch (cm_id_priv->qp_type) {
3671 case IB_QPT_RC:
3672 case IB_QPT_XRC_INI:
3673 *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY |
e1444b5a 3674 IB_QP_MAX_QP_RD_ATOMIC;
e1444b5a
SH		 3675 qp_attr->retry_cnt = cm_id_priv->retry_count;
3676 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
d26a360b
SH		 3677 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3678 /* fall through */
3679 case IB_QPT_XRC_TGT:
3680 *qp_attr_mask |= IB_QP_TIMEOUT;
3681 qp_attr->timeout = cm_id_priv->av.timeout;
3682 break;
3683 default:
3684 break;
e1444b5a
SH		 3685 }
3686 if (cm_id_priv->alt_av.ah_attr.dlid) {
3687 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3688 qp_attr->path_mig_state = IB_MIG_REARM;
3689 }
3690 } else {
3691 *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
3692 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3693 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
1d846126 3694 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
e1444b5a 3695 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
a977049d
HR		 3696 qp_attr->path_mig_state = IB_MIG_REARM;
3697 }
3698 ret = 0;
3699 break;
3700 default:
3701 ret = -EINVAL;
3702 break;
3703 }
3704 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3705 return ret;
3706}
3707
3708int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3709 struct ib_qp_attr *qp_attr,
3710 int *qp_attr_mask)
3711{
3712 struct cm_id_private *cm_id_priv;
3713 int ret;
3714
3715 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3716 switch (qp_attr->qp_state) {
3717 case IB_QPS_INIT:
3718 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3719 break;
3720 case IB_QPS_RTR:
3721 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3722 break;
3723 case IB_QPS_RTS:
3724 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3725 break;
3726 default:
3727 ret = -EINVAL;
3728 break;
3729 }
3730 return ret;
3731}
3732EXPORT_SYMBOL(ib_cm_init_qp_attr);
3733
454a01e7 3734static void cm_get_ack_delay(struct cm_device *cm_dev)
1d846126
SH		 3735{
3736 struct ib_device_attr attr;
3737
d4c4196f 3738 if (ib_query_device(cm_dev->ib_device, &attr))
1d846126
SH		 3739 cm_dev->ack_delay = 0; /* acks will rely on packet life time */
3740 else
3741 cm_dev->ack_delay = attr.local_ca_ack_delay;
3742}
3743
9af57b7a
SH		 3744static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr,
3745 char *buf)
3746{
3747 struct cm_counter_group *group;
3748 struct cm_counter_attribute *cm_attr;
3749
3750 group = container_of(obj, struct cm_counter_group, obj);
3751 cm_attr = container_of(attr, struct cm_counter_attribute, attr);
3752
3753 return sprintf(buf, "%ld\n",
3754 atomic_long_read(&group->counter[cm_attr->index]));
3755}
3756
52cf25d0 3757static const struct sysfs_ops cm_counter_ops = {
9af57b7a
SH		 3758 .show = cm_show_counter
3759};
3760
3761static struct kobj_type cm_counter_obj_type = {
3762 .sysfs_ops = &cm_counter_ops,
3763 .default_attrs = cm_counter_default_attrs
3764};
3765
3766static void cm_release_port_obj(struct kobject *obj)
3767{
3768 struct cm_port *cm_port;
3769
9af57b7a
SH		 3770 cm_port = container_of(obj, struct cm_port, port_obj);
3771 kfree(cm_port);
3772}
3773
3774static struct kobj_type cm_port_obj_type = {
3775 .release = cm_release_port_obj
3776};
3777
2c9ede55 3778static char *cm_devnode(struct device *dev, umode_t *mode)
c3af0980 3779{
b2bc4782
GR		 3780 if (mode)
3781 *mode = 0666;
c3af0980
RD		 3782 return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
3783}
3784
9af57b7a 3785struct class cm_class = {
c3af0980 3786 .owner = THIS_MODULE,
9af57b7a 3787 .name = "infiniband_cm",
c3af0980 3788 .devnode = cm_devnode,
9af57b7a
SH		 3789};
3790EXPORT_SYMBOL(cm_class);
3791
9af57b7a
SH		 3792static int cm_create_port_fs(struct cm_port *port)
3793{
3794 int i, ret;
3795
3796 ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type,
110cf374 3797 &port->cm_dev->device->kobj,
9af57b7a
SH		 3798 "%d", port->port_num);
3799 if (ret) {
3800 kfree(port);
3801 return ret;
3802 }
3803
3804 for (i = 0; i < CM_COUNTER_GROUPS; i++) {
3805 ret = kobject_init_and_add(&port->counter_group[i].obj,
3806 &cm_counter_obj_type,
7c7a9bcc 3807 &port->port_obj,
9af57b7a
SH		 3808 "%s", counter_group_names[i]);
3809 if (ret)
3810 goto error;
3811 }
3812
3813 return 0;
3814
3815error:
3816 while (i--)
7c7a9bcc
RD		 3817 kobject_put(&port->counter_group[i].obj);
3818 kobject_put(&port->port_obj);
9af57b7a
SH		 3819 return ret;
3820
3821}
3822
3823static void cm_remove_port_fs(struct cm_port *port)
3824{
3825 int i;
3826
3827 for (i = 0; i < CM_COUNTER_GROUPS; i++)
7c7a9bcc 3828 kobject_put(&port->counter_group[i].obj);
9af57b7a 3829
7c7a9bcc 3830 kobject_put(&port->port_obj);
9af57b7a
SH		 3831}
3832
d4c4196f 3833static void cm_add_one(struct ib_device *ib_device)
a977049d
HR		 3834{
3835 struct cm_device *cm_dev;
3836 struct cm_port *port;
3837 struct ib_mad_reg_req reg_req = {
3838 .mgmt_class = IB_MGMT_CLASS_CM,
0f29b46d 3839 .mgmt_class_version = IB_CM_CLASS_VERSION,
a977049d
HR		 3840 };
3841 struct ib_port_modify port_modify = {
3842 .set_port_cap_mask = IB_PORT_CM_SUP
3843 };
3844 unsigned long flags;
3845 int ret;
091e6a4c 3846 int count = 0;
a977049d
HR		 3847 u8 i;
3848
9af57b7a 3849 cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) *
d4c4196f 3850 ib_device->phys_port_cnt, GFP_KERNEL);
a977049d
HR		 3851 if (!cm_dev)
3852 return;
3853
d4c4196f 3854 cm_dev->ib_device = ib_device;
1d846126 3855 cm_get_ack_delay(cm_dev);
be4b4993 3856 cm_dev->going_down = 0;
91bd418f
GKH		 3857 cm_dev->device = device_create(&cm_class, &ib_device->dev,
3858 MKDEV(0, 0), NULL,
3859 "%s", ib_device->name);
3e340c05 3860 if (IS_ERR(cm_dev->device)) {
9af57b7a
SH		 3861 kfree(cm_dev);
3862 return;
3863 }
3864
a977049d 3865 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
d4c4196f 3866 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
72219cea 3867 if (!rdma_cap_ib_cm(ib_device, i))
091e6a4c
MW		 3868 continue;
3869
9af57b7a
SH		 3870 port = kzalloc(sizeof *port, GFP_KERNEL);
3871 if (!port)
3872 goto error1;
3873
3874 cm_dev->port[i-1] = port;
a977049d
HR		 3875 port->cm_dev = cm_dev;
3876 port->port_num = i;
9af57b7a
SH		 3877
3878 ret = cm_create_port_fs(port);
3879 if (ret)
3880 goto error1;
3881
d4c4196f 3882 port->mad_agent = ib_register_mad_agent(ib_device, i,
a977049d
HR		 3883 IB_QPT_GSI,
3884 &reg_req,
3885 0,
3886 cm_send_handler,
3887 cm_recv_handler,
0f29b46d
IW		 3888 port,
3889 0);
a977049d 3890 if (IS_ERR(port->mad_agent))
9af57b7a 3891 goto error2;
a977049d 3892
d4c4196f 3893 ret = ib_modify_port(ib_device, i, 0, &port_modify);
a977049d 3894 if (ret)
9af57b7a 3895 goto error3;
091e6a4c
MW		 3896
3897 count++;
a977049d 3898 }
091e6a4c
MW		 3899
3900 if (!count)
3901 goto free;
3902
d4c4196f 3903 ib_set_client_data(ib_device, &cm_client, cm_dev);
a977049d
HR		 3904
3905 write_lock_irqsave(&cm.device_lock, flags);
3906 list_add_tail(&cm_dev->list, &cm.device_list);
3907 write_unlock_irqrestore(&cm.device_lock, flags);
3908 return;
3909
9af57b7a 3910error3:
cf311cd4 3911 ib_unregister_mad_agent(port->mad_agent);
9af57b7a
SH		 3912error2:
3913 cm_remove_port_fs(port);
cf311cd4 3914error1:
a977049d
HR		 3915 port_modify.set_port_cap_mask = 0;
3916 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3917 while (--i) {
72219cea 3918 if (!rdma_cap_ib_cm(ib_device, i))
091e6a4c
MW		 3919 continue;
3920
9af57b7a 3921 port = cm_dev->port[i-1];
d4c4196f 3922 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
a977049d 3923 ib_unregister_mad_agent(port->mad_agent);
9af57b7a 3924 cm_remove_port_fs(port);
a977049d 3925 }
091e6a4c 3926free:
110cf374 3927 device_unregister(cm_dev->device);
a7e80ce2 3928 kfree(cm_dev);
a977049d
HR		 3929}
3930
7c1eb45a 3931static void cm_remove_one(struct ib_device *ib_device, void *client_data)
a977049d 3932{
7c1eb45a 3933 struct cm_device *cm_dev = client_data;
a977049d
HR		 3934 struct cm_port *port;
3935 struct ib_port_modify port_modify = {
3936 .clr_port_cap_mask = IB_PORT_CM_SUP
3937 };
3938 unsigned long flags;
3939 int i;
3940
a977049d
HR		 3941 if (!cm_dev)
3942 return;
3943
3944 write_lock_irqsave(&cm.device_lock, flags);
3945 list_del(&cm_dev->list);
3946 write_unlock_irqrestore(&cm.device_lock, flags);
3947
be4b4993
ES		 3948 spin_lock_irq(&cm.lock);
3949 cm_dev->going_down = 1;
3950 spin_unlock_irq(&cm.lock);
3951
d4c4196f 3952 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
72219cea 3953 if (!rdma_cap_ib_cm(ib_device, i))
091e6a4c
MW		 3954 continue;
3955
9af57b7a 3956 port = cm_dev->port[i-1];
d4c4196f 3957 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
be4b4993
ES		 3958 /*
3959 * We flush the queue here after the going_down set, this
3960 * verify that no new works will be queued in the recv handler,
3961 * after that we can call the unregister_mad_agent
3962 */
84ba284c 3963 flush_workqueue(cm.wq);
be4b4993 3964 ib_unregister_mad_agent(port->mad_agent);
9af57b7a 3965 cm_remove_port_fs(port);
a977049d 3966 }
110cf374 3967 device_unregister(cm_dev->device);
a7e80ce2 3968 kfree(cm_dev);
a977049d
HR		 3969}
3970
3971static int __init ib_cm_init(void)
3972{
3973 int ret;
3974
3975 memset(&cm, 0, sizeof cm);
3976 INIT_LIST_HEAD(&cm.device_list);
3977 rwlock_init(&cm.device_lock);
3978 spin_lock_init(&cm.lock);
3979 cm.listen_service_table = RB_ROOT;
9c3da099 3980 cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
a977049d
HR		 3981 cm.remote_id_table = RB_ROOT;
3982 cm.remote_qp_table = RB_ROOT;
3983 cm.remote_sidr_table = RB_ROOT;
3984 idr_init(&cm.local_id_table);
f06d2653 3985 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
8575329d 3986 INIT_LIST_HEAD(&cm.timewait_list);
a977049d 3987
9af57b7a 3988 ret = class_register(&cm_class);
87d4abda
DB		 3989 if (ret) {
3990 ret = -ENOMEM;
3991 goto error1;
3992 }
a977049d 3993
9af57b7a
SH		 3994 cm.wq = create_workqueue("ib_cm");
3995 if (!cm.wq) {
3996 ret = -ENOMEM;
87d4abda 3997 goto error2;
9af57b7a
SH		 3998 }
3999
a977049d
HR		 4000 ret = ib_register_client(&cm_client);
4001 if (ret)
87d4abda 4002 goto error3;
a977049d
HR		 4003
4004 return 0;
87d4abda 4005error3:
a977049d 4006 destroy_workqueue(cm.wq);
87d4abda 4007error2:
9af57b7a 4008 class_unregister(&cm_class);
87d4abda
DB		 4009error1:
4010 idr_destroy(&cm.local_id_table);
a977049d
HR		 4011 return ret;
4012}
4013
4014static void __exit ib_cm_cleanup(void)
4015{
8575329d
SH		 4016 struct cm_timewait_info *timewait_info, *tmp;
4017
4018 spin_lock_irq(&cm.lock);
4019 list_for_each_entry(timewait_info, &cm.timewait_list, list)
4020 cancel_delayed_work(&timewait_info->work.work);
4021 spin_unlock_irq(&cm.lock);
4022
84ba284c 4023 ib_unregister_client(&cm_client);
a977049d 4024 destroy_workqueue(cm.wq);
8575329d
SH		 4025
4026 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
4027 list_del(&timewait_info->list);
4028 kfree(timewait_info);
4029 }
4030
9af57b7a 4031 class_unregister(&cm_class);
5d7edb3c 4032 idr_destroy(&cm.local_id_table);
a977049d
HR		 4033}
4034
4035module_init(ib_cm_init);
4036module_exit(ib_cm_cleanup);
4037
Linux kernel - Deliverables
This page took 1.457224 seconds and 5 git commands to generate.