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RDMA/cma: Support XRC QPs
[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>
a977049d
HR		 39#include <linux/err.h>
40#include <linux/idr.h>
41#include <linux/interrupt.h>
f06d2653 42#include <linux/random.h>
a977049d
HR		 43#include <linux/rbtree.h>
44#include <linux/spinlock.h>
5a0e3ad6 45#include <linux/slab.h>
9af57b7a 46#include <linux/sysfs.h>
a977049d 47#include <linux/workqueue.h>
110cf374 48#include <linux/kdev_t.h>
a977049d 49
a4d61e84
RD		 50#include <rdma/ib_cache.h>
51#include <rdma/ib_cm.h>
a977049d
HR		 52#include "cm_msgs.h"
53
54MODULE_AUTHOR("Sean Hefty");
55MODULE_DESCRIPTION("InfiniBand CM");
56MODULE_LICENSE("Dual BSD/GPL");
57
58static void cm_add_one(struct ib_device *device);
59static void cm_remove_one(struct ib_device *device);
60
61static struct ib_client cm_client = {
62 .name = "cm",
63 .add = cm_add_one,
64 .remove = cm_remove_one
65};
66
67static struct ib_cm {
68 spinlock_t lock;
69 struct list_head device_list;
70 rwlock_t device_lock;
71 struct rb_root listen_service_table;
72 u64 listen_service_id;
73 /* struct rb_root peer_service_table; todo: fix peer to peer */
74 struct rb_root remote_qp_table;
75 struct rb_root remote_id_table;
76 struct rb_root remote_sidr_table;
77 struct idr local_id_table;
f06d2653 78 __be32 random_id_operand;
8575329d 79 struct list_head timewait_list;
a977049d
HR		 80 struct workqueue_struct *wq;
81} cm;
82
9af57b7a
SH		 83/* Counter indexes ordered by attribute ID */
84enum {
85 CM_REQ_COUNTER,
86 CM_MRA_COUNTER,
87 CM_REJ_COUNTER,
88 CM_REP_COUNTER,
89 CM_RTU_COUNTER,
90 CM_DREQ_COUNTER,
91 CM_DREP_COUNTER,
92 CM_SIDR_REQ_COUNTER,
93 CM_SIDR_REP_COUNTER,
94 CM_LAP_COUNTER,
95 CM_APR_COUNTER,
96 CM_ATTR_COUNT,
97 CM_ATTR_ID_OFFSET = 0x0010,
98};
99
100enum {
101 CM_XMIT,
102 CM_XMIT_RETRIES,
103 CM_RECV,
104 CM_RECV_DUPLICATES,
105 CM_COUNTER_GROUPS
106};
107
108static char const counter_group_names[CM_COUNTER_GROUPS]
109 [sizeof("cm_rx_duplicates")] = {
110 "cm_tx_msgs", "cm_tx_retries",
111 "cm_rx_msgs", "cm_rx_duplicates"
112};
113
114struct cm_counter_group {
115 struct kobject obj;
116 atomic_long_t counter[CM_ATTR_COUNT];
117};
118
119struct cm_counter_attribute {
120 struct attribute attr;
121 int index;
122};
123
124#define CM_COUNTER_ATTR(_name, _index) \
125struct cm_counter_attribute cm_##_name##_counter_attr = { \
01e8ef11 126 .attr = { .name = __stringify(_name), .mode = 0444 }, \
9af57b7a
SH		 127 .index = _index \
128}
129
130static CM_COUNTER_ATTR(req, CM_REQ_COUNTER);
131static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER);
132static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER);
133static CM_COUNTER_ATTR(rep, CM_REP_COUNTER);
134static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER);
135static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER);
136static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER);
137static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER);
138static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER);
139static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER);
140static CM_COUNTER_ATTR(apr, CM_APR_COUNTER);
141
142static struct attribute *cm_counter_default_attrs[] = {
143 &cm_req_counter_attr.attr,
144 &cm_mra_counter_attr.attr,
145 &cm_rej_counter_attr.attr,
146 &cm_rep_counter_attr.attr,
147 &cm_rtu_counter_attr.attr,
148 &cm_dreq_counter_attr.attr,
149 &cm_drep_counter_attr.attr,
150 &cm_sidr_req_counter_attr.attr,
151 &cm_sidr_rep_counter_attr.attr,
152 &cm_lap_counter_attr.attr,
153 &cm_apr_counter_attr.attr,
154 NULL
155};
156
a977049d
HR		 157struct cm_port {
158 struct cm_device *cm_dev;
159 struct ib_mad_agent *mad_agent;
9af57b7a 160 struct kobject port_obj;
a977049d 161 u8 port_num;
9af57b7a 162 struct cm_counter_group counter_group[CM_COUNTER_GROUPS];
a977049d
HR		 163};
164
165struct cm_device {
166 struct list_head list;
d4c4196f 167 struct ib_device *ib_device;
110cf374 168 struct device *device;
1d846126 169 u8 ack_delay;
9af57b7a 170 struct cm_port *port[0];
a977049d
HR		 171};
172
173struct cm_av {
174 struct cm_port *port;
175 union ib_gid dgid;
176 struct ib_ah_attr ah_attr;
177 u16 pkey_index;
1d846126 178 u8 timeout;
a977049d
HR		 179};
180
181struct cm_work {
c4028958 182 struct delayed_work work;
a977049d
HR		 183 struct list_head list;
184 struct cm_port *port;
185 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
97f52eb4
SH		 186 __be32 local_id; /* Established / timewait */
187 __be32 remote_id;
a977049d
HR		 188 struct ib_cm_event cm_event;
189 struct ib_sa_path_rec path[0];
190};
191
192struct cm_timewait_info {
193 struct cm_work work; /* Must be first. */
8575329d 194 struct list_head list;
a977049d
HR		 195 struct rb_node remote_qp_node;
196 struct rb_node remote_id_node;
97f52eb4
SH		 197 __be64 remote_ca_guid;
198 __be32 remote_qpn;
a977049d
HR		 199 u8 inserted_remote_qp;
200 u8 inserted_remote_id;
201};
202
203struct cm_id_private {
204 struct ib_cm_id id;
205
206 struct rb_node service_node;
207 struct rb_node sidr_id_node;
87fd1a11 208 spinlock_t lock; /* Do not acquire inside cm.lock */
1b52fa98 209 struct completion comp;
a977049d
HR		 210 atomic_t refcount;
211
212 struct ib_mad_send_buf *msg;
213 struct cm_timewait_info *timewait_info;
214 /* todo: use alternate port on send failure */
215 struct cm_av av;
216 struct cm_av alt_av;
6e61d04f 217 struct ib_cm_compare_data *compare_data;
a977049d
HR		 218
219 void *private_data;
97f52eb4
SH		 220 __be64 tid;
221 __be32 local_qpn;
222 __be32 remote_qpn;
ae7971a7 223 enum ib_qp_type qp_type;
97f52eb4
SH		 224 __be32 sq_psn;
225 __be32 rq_psn;
a977049d
HR		 226 int timeout_ms;
227 enum ib_mtu path_mtu;
e1444b5a 228 __be16 pkey;
a977049d
HR		 229 u8 private_data_len;
230 u8 max_cm_retries;
231 u8 peer_to_peer;
232 u8 responder_resources;
233 u8 initiator_depth;
a977049d
HR		 234 u8 retry_count;
235 u8 rnr_retry_count;
236 u8 service_timeout;
1d846126 237 u8 target_ack_delay;
a977049d
HR		 238
239 struct list_head work_list;
240 atomic_t work_count;
241};
242
c4028958 243static void cm_work_handler(struct work_struct *work);
a977049d
HR		 244
245static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
246{
247 if (atomic_dec_and_test(&cm_id_priv->refcount))
1b52fa98 248 complete(&cm_id_priv->comp);
a977049d
HR		 249}
250
251static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
252 struct ib_mad_send_buf **msg)
253{
254 struct ib_mad_agent *mad_agent;
255 struct ib_mad_send_buf *m;
256 struct ib_ah *ah;
257
258 mad_agent = cm_id_priv->av.port->mad_agent;
259 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
260 if (IS_ERR(ah))
261 return PTR_ERR(ah);
262
3cd96564 263 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
354ba39c 264 cm_id_priv->av.pkey_index,
34816ad9 265 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 266 GFP_ATOMIC);
267 if (IS_ERR(m)) {
268 ib_destroy_ah(ah);
269 return PTR_ERR(m);
270 }
271
272 /* Timeout set by caller if response is expected. */
34816ad9
SH		 273 m->ah = ah;
274 m->retries = cm_id_priv->max_cm_retries;
a977049d
HR		 275
276 atomic_inc(&cm_id_priv->refcount);
277 m->context[0] = cm_id_priv;
278 *msg = m;
279 return 0;
280}
281
282static int cm_alloc_response_msg(struct cm_port *port,
283 struct ib_mad_recv_wc *mad_recv_wc,
284 struct ib_mad_send_buf **msg)
285{
286 struct ib_mad_send_buf *m;
287 struct ib_ah *ah;
288
289 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
290 mad_recv_wc->recv_buf.grh, port->port_num);
291 if (IS_ERR(ah))
292 return PTR_ERR(ah);
293
294 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
34816ad9 295 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
a977049d
HR		 296 GFP_ATOMIC);
297 if (IS_ERR(m)) {
298 ib_destroy_ah(ah);
299 return PTR_ERR(m);
300 }
34816ad9 301 m->ah = ah;
a977049d
HR		 302 *msg = m;
303 return 0;
304}
305
306static void cm_free_msg(struct ib_mad_send_buf *msg)
307{
34816ad9 308 ib_destroy_ah(msg->ah);
a977049d
HR		 309 if (msg->context[0])
310 cm_deref_id(msg->context[0]);
311 ib_free_send_mad(msg);
312}
313
314static void * cm_copy_private_data(const void *private_data,
315 u8 private_data_len)
316{
317 void *data;
318
319 if (!private_data || !private_data_len)
320 return NULL;
321
bed8bdfd 322 data = kmemdup(private_data, private_data_len, GFP_KERNEL);
a977049d
HR		 323 if (!data)
324 return ERR_PTR(-ENOMEM);
325
a977049d
HR		 326 return data;
327}
328
329static void cm_set_private_data(struct cm_id_private *cm_id_priv,
330 void *private_data, u8 private_data_len)
331{
332 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
333 kfree(cm_id_priv->private_data);
334
335 cm_id_priv->private_data = private_data;
336 cm_id_priv->private_data_len = private_data_len;
337}
338
ca222c6b
SH		 339static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
340 struct ib_grh *grh, struct cm_av *av)
a977049d
HR		 341{
342 av->port = port;
343 av->pkey_index = wc->pkey_index;
d4c4196f 344 ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc,
ca222c6b 345 grh, &av->ah_attr);
a977049d
HR		 346}
347
348static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
349{
350 struct cm_device *cm_dev;
351 struct cm_port *port = NULL;
352 unsigned long flags;
353 int ret;
354 u8 p;
355
356 read_lock_irqsave(&cm.device_lock, flags);
357 list_for_each_entry(cm_dev, &cm.device_list, list) {
d4c4196f 358 if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid,
a977049d 359 &p, NULL)) {
9af57b7a 360 port = cm_dev->port[p-1];
a977049d
HR		 361 break;
362 }
363 }
364 read_unlock_irqrestore(&cm.device_lock, flags);
365
366 if (!port)
367 return -EINVAL;
368
d4c4196f 369 ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num,
a977049d
HR		 370 be16_to_cpu(path->pkey), &av->pkey_index);
371 if (ret)
372 return ret;
373
374 av->port = port;
d4c4196f 375 ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path,
ca222c6b 376 &av->ah_attr);
1d846126 377 av->timeout = path->packet_life_time + 1;
a977049d
HR		 378 return 0;
379}
380
381static int cm_alloc_id(struct cm_id_private *cm_id_priv)
382{
383 unsigned long flags;
f06d2653 384 int ret, id;
de1bb1a6 385 static int next_id;
a977049d
HR		 386
387 do {
388 spin_lock_irqsave(&cm.lock, flags);
f06d2653 389 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv,
9f81036c
MT		 390 next_id, &id);
391 if (!ret)
392 next_id = ((unsigned) id + 1) & MAX_ID_MASK;
a977049d
HR		 393 spin_unlock_irqrestore(&cm.lock, flags);
394 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
f06d2653 395
1b90c137 396 cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
a977049d
HR		 397 return ret;
398}
399
97f52eb4 400static void cm_free_id(__be32 local_id)
a977049d 401{
24be6e81 402 spin_lock_irq(&cm.lock);
f06d2653
SH		 403 idr_remove(&cm.local_id_table,
404 (__force int) (local_id ^ cm.random_id_operand));
24be6e81 405 spin_unlock_irq(&cm.lock);
a977049d
HR		 406}
407
97f52eb4 408static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 409{
410 struct cm_id_private *cm_id_priv;
411
f06d2653
SH		 412 cm_id_priv = idr_find(&cm.local_id_table,
413 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 414 if (cm_id_priv) {
415 if (cm_id_priv->id.remote_id == remote_id)
416 atomic_inc(&cm_id_priv->refcount);
417 else
418 cm_id_priv = NULL;
419 }
420
421 return cm_id_priv;
422}
423
97f52eb4 424static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 425{
426 struct cm_id_private *cm_id_priv;
a977049d 427
24be6e81 428 spin_lock_irq(&cm.lock);
a977049d 429 cm_id_priv = cm_get_id(local_id, remote_id);
24be6e81 430 spin_unlock_irq(&cm.lock);
a977049d
HR		 431
432 return cm_id_priv;
433}
434
6e61d04f
SH		 435static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask)
436{
437 int i;
438
439 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++)
440 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] &
441 ((unsigned long *) mask)[i];
442}
443
444static int cm_compare_data(struct ib_cm_compare_data *src_data,
445 struct ib_cm_compare_data *dst_data)
446{
447 u8 src[IB_CM_COMPARE_SIZE];
448 u8 dst[IB_CM_COMPARE_SIZE];
449
450 if (!src_data || !dst_data)
451 return 0;
452
453 cm_mask_copy(src, src_data->data, dst_data->mask);
454 cm_mask_copy(dst, dst_data->data, src_data->mask);
455 return memcmp(src, dst, IB_CM_COMPARE_SIZE);
456}
457
458static int cm_compare_private_data(u8 *private_data,
459 struct ib_cm_compare_data *dst_data)
460{
461 u8 src[IB_CM_COMPARE_SIZE];
462
463 if (!dst_data)
464 return 0;
465
466 cm_mask_copy(src, private_data, dst_data->mask);
467 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE);
468}
469
a88f4888
RD		 470/*
471 * Trivial helpers to strip endian annotation and compare; the
472 * endianness doesn't actually matter since we just need a stable
473 * order for the RB tree.
474 */
475static int be32_lt(__be32 a, __be32 b)
476{
477 return (__force u32) a < (__force u32) b;
478}
479
480static int be32_gt(__be32 a, __be32 b)
481{
482 return (__force u32) a > (__force u32) b;
483}
484
485static int be64_lt(__be64 a, __be64 b)
486{
487 return (__force u64) a < (__force u64) b;
488}
489
490static int be64_gt(__be64 a, __be64 b)
491{
492 return (__force u64) a > (__force u64) b;
493}
494
a977049d
HR		 495static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
496{
497 struct rb_node **link = &cm.listen_service_table.rb_node;
498 struct rb_node *parent = NULL;
499 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 500 __be64 service_id = cm_id_priv->id.service_id;
501 __be64 service_mask = cm_id_priv->id.service_mask;
6e61d04f 502 int data_cmp;
a977049d
HR		 503
504 while (*link) {
505 parent = *link;
506 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
507 service_node);
6e61d04f
SH		 508 data_cmp = cm_compare_data(cm_id_priv->compare_data,
509 cur_cm_id_priv->compare_data);
a977049d 510 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0 511 (service_mask & cur_cm_id_priv->id.service_id) &&
6e61d04f
SH		 512 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
513 !data_cmp)
07d357d0
SH		 514 return cur_cm_id_priv;
515
516 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
517 link = &(*link)->rb_left;
518 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
519 link = &(*link)->rb_right;
a88f4888 520 else if (be64_lt(service_id, cur_cm_id_priv->id.service_id))
a977049d 521 link = &(*link)->rb_left;
a88f4888 522 else if (be64_gt(service_id, cur_cm_id_priv->id.service_id))
6e61d04f
SH		 523 link = &(*link)->rb_right;
524 else if (data_cmp < 0)
525 link = &(*link)->rb_left;
a977049d
HR		 526 else
527 link = &(*link)->rb_right;
528 }
529 rb_link_node(&cm_id_priv->service_node, parent, link);
530 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
531 return NULL;
532}
533
07d357d0 534static struct cm_id_private * cm_find_listen(struct ib_device *device,
6e61d04f
SH		 535 __be64 service_id,
536 u8 *private_data)
a977049d
HR		 537{
538 struct rb_node *node = cm.listen_service_table.rb_node;
539 struct cm_id_private *cm_id_priv;
6e61d04f 540 int data_cmp;
a977049d
HR		 541
542 while (node) {
543 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
6e61d04f
SH		 544 data_cmp = cm_compare_private_data(private_data,
545 cm_id_priv->compare_data);
a977049d 546 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0 547 cm_id_priv->id.service_id &&
6e61d04f 548 (cm_id_priv->id.device == device) && !data_cmp)
a977049d 549 return cm_id_priv;
07d357d0
SH		 550
551 if (device < cm_id_priv->id.device)
552 node = node->rb_left;
553 else if (device > cm_id_priv->id.device)
554 node = node->rb_right;
a88f4888 555 else if (be64_lt(service_id, cm_id_priv->id.service_id))
a977049d 556 node = node->rb_left;
a88f4888 557 else if (be64_gt(service_id, cm_id_priv->id.service_id))
6e61d04f
SH		 558 node = node->rb_right;
559 else if (data_cmp < 0)
560 node = node->rb_left;
a977049d
HR		 561 else
562 node = node->rb_right;
563 }
564 return NULL;
565}
566
567static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
568 *timewait_info)
569{
570 struct rb_node **link = &cm.remote_id_table.rb_node;
571 struct rb_node *parent = NULL;
572 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 573 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
574 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 575
576 while (*link) {
577 parent = *link;
578 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
579 remote_id_node);
a88f4888 580 if (be32_lt(remote_id, cur_timewait_info->work.remote_id))
a977049d 581 link = &(*link)->rb_left;
a88f4888 582 else if (be32_gt(remote_id, cur_timewait_info->work.remote_id))
a977049d 583 link = &(*link)->rb_right;
a88f4888 584 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d 585 link = &(*link)->rb_left;
a88f4888 586 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d
HR		 587 link = &(*link)->rb_right;
588 else
589 return cur_timewait_info;
590 }
591 timewait_info->inserted_remote_id = 1;
592 rb_link_node(&timewait_info->remote_id_node, parent, link);
593 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
594 return NULL;
595}
596
97f52eb4
SH		 597static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
598 __be32 remote_id)
a977049d
HR		 599{
600 struct rb_node *node = cm.remote_id_table.rb_node;
601 struct cm_timewait_info *timewait_info;
602
603 while (node) {
604 timewait_info = rb_entry(node, struct cm_timewait_info,
605 remote_id_node);
a88f4888 606 if (be32_lt(remote_id, timewait_info->work.remote_id))
a977049d 607 node = node->rb_left;
a88f4888 608 else if (be32_gt(remote_id, timewait_info->work.remote_id))
a977049d 609 node = node->rb_right;
a88f4888 610 else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid))
a977049d 611 node = node->rb_left;
a88f4888 612 else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid))
a977049d
HR		 613 node = node->rb_right;
614 else
615 return timewait_info;
616 }
617 return NULL;
618}
619
620static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
621 *timewait_info)
622{
623 struct rb_node **link = &cm.remote_qp_table.rb_node;
624 struct rb_node *parent = NULL;
625 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 626 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
627 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 628
629 while (*link) {
630 parent = *link;
631 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
632 remote_qp_node);
a88f4888 633 if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn))
a977049d 634 link = &(*link)->rb_left;
a88f4888 635 else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn))
a977049d 636 link = &(*link)->rb_right;
a88f4888 637 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d 638 link = &(*link)->rb_left;
a88f4888 639 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d
HR		 640 link = &(*link)->rb_right;
641 else
642 return cur_timewait_info;
643 }
644 timewait_info->inserted_remote_qp = 1;
645 rb_link_node(&timewait_info->remote_qp_node, parent, link);
646 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
647 return NULL;
648}
649
650static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
651 *cm_id_priv)
652{
653 struct rb_node **link = &cm.remote_sidr_table.rb_node;
654 struct rb_node *parent = NULL;
655 struct cm_id_private *cur_cm_id_priv;
656 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 657 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 658
659 while (*link) {
660 parent = *link;
661 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
662 sidr_id_node);
a88f4888 663 if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id))
a977049d 664 link = &(*link)->rb_left;
a88f4888 665 else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id))
a977049d
HR		 666 link = &(*link)->rb_right;
667 else {
668 int cmp;
669 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
670 sizeof *port_gid);
671 if (cmp < 0)
672 link = &(*link)->rb_left;
673 else if (cmp > 0)
674 link = &(*link)->rb_right;
675 else
676 return cur_cm_id_priv;
677 }
678 }
679 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
680 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
681 return NULL;
682}
683
684static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
685 enum ib_cm_sidr_status status)
686{
687 struct ib_cm_sidr_rep_param param;
688
689 memset(&param, 0, sizeof param);
690 param.status = status;
691 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
692}
693
07d357d0
SH		 694struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
695 ib_cm_handler cm_handler,
a977049d
HR		 696 void *context)
697{
698 struct cm_id_private *cm_id_priv;
699 int ret;
700
de6eb66b 701 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
a977049d
HR		 702 if (!cm_id_priv)
703 return ERR_PTR(-ENOMEM);
704
a977049d 705 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 706 cm_id_priv->id.device = device;
a977049d
HR		 707 cm_id_priv->id.cm_handler = cm_handler;
708 cm_id_priv->id.context = context;
354ba39c 709 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 710 ret = cm_alloc_id(cm_id_priv);
711 if (ret)
712 goto error;
713
714 spin_lock_init(&cm_id_priv->lock);
1b52fa98 715 init_completion(&cm_id_priv->comp);
a977049d
HR		 716 INIT_LIST_HEAD(&cm_id_priv->work_list);
717 atomic_set(&cm_id_priv->work_count, -1);
718 atomic_set(&cm_id_priv->refcount, 1);
719 return &cm_id_priv->id;
720
721error:
722 kfree(cm_id_priv);
723 return ERR_PTR(-ENOMEM);
724}
725EXPORT_SYMBOL(ib_create_cm_id);
726
727static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
728{
729 struct cm_work *work;
730
731 if (list_empty(&cm_id_priv->work_list))
732 return NULL;
733
734 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
735 list_del(&work->list);
736 return work;
737}
738
739static void cm_free_work(struct cm_work *work)
740{
741 if (work->mad_recv_wc)
742 ib_free_recv_mad(work->mad_recv_wc);
743 kfree(work);
744}
745
746static inline int cm_convert_to_ms(int iba_time)
747{
748 /* approximate conversion to ms from 4.096us x 2^iba_time */
749 return 1 << max(iba_time - 8, 0);
750}
751
1d846126
SH		 752/*
753 * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
754 * Because of how ack_timeout is stored, adding one doubles the timeout.
755 * To avoid large timeouts, select the max(ack_delay, life_time + 1), and
756 * increment it (round up) only if the other is within 50%.
757 */
758static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time)
759{
760 int ack_timeout = packet_life_time + 1;
761
762 if (ack_timeout >= ca_ack_delay)
763 ack_timeout += (ca_ack_delay >= (ack_timeout - 1));
764 else
765 ack_timeout = ca_ack_delay +
766 (ack_timeout >= (ca_ack_delay - 1));
767
768 return min(31, ack_timeout);
769}
770
a977049d
HR		 771static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
772{
a977049d
HR		 773 if (timewait_info->inserted_remote_id) {
774 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
775 timewait_info->inserted_remote_id = 0;
776 }
777
778 if (timewait_info->inserted_remote_qp) {
779 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
780 timewait_info->inserted_remote_qp = 0;
781 }
a977049d
HR		 782}
783
97f52eb4 784static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 785{
786 struct cm_timewait_info *timewait_info;
787
de6eb66b 788 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
a977049d
HR		 789 if (!timewait_info)
790 return ERR_PTR(-ENOMEM);
a977049d
HR		 791
792 timewait_info->work.local_id = local_id;
c4028958 793 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
a977049d
HR		 794 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
795 return timewait_info;
796}
797
798static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
799{
800 int wait_time;
8575329d 801 unsigned long flags;
a977049d 802
8575329d 803 spin_lock_irqsave(&cm.lock, flags);
a70d0590 804 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d
SH		 805 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
806 spin_unlock_irqrestore(&cm.lock, flags);
a70d0590 807
a977049d
HR		 808 /*
809 * The cm_id could be destroyed by the user before we exit timewait.
810 * To protect against this, we search for the cm_id after exiting
811 * timewait before notifying the user that we've exited timewait.
812 */
813 cm_id_priv->id.state = IB_CM_TIMEWAIT;
1d846126 814 wait_time = cm_convert_to_ms(cm_id_priv->av.timeout);
a977049d
HR		 815 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
816 msecs_to_jiffies(wait_time));
817 cm_id_priv->timewait_info = NULL;
818}
819
820static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
821{
8575329d
SH		 822 unsigned long flags;
823
a977049d
HR		 824 cm_id_priv->id.state = IB_CM_IDLE;
825 if (cm_id_priv->timewait_info) {
8575329d 826 spin_lock_irqsave(&cm.lock, flags);
a977049d 827 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d 828 spin_unlock_irqrestore(&cm.lock, flags);
a977049d
HR		 829 kfree(cm_id_priv->timewait_info);
830 cm_id_priv->timewait_info = NULL;
831 }
832}
833
04c33543 834static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
a977049d
HR		 835{
836 struct cm_id_private *cm_id_priv;
837 struct cm_work *work;
a977049d
HR		 838
839 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
840retest:
24be6e81 841 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 842 switch (cm_id->state) {
843 case IB_CM_LISTEN:
844 cm_id->state = IB_CM_IDLE;
24be6e81
SH		 845 spin_unlock_irq(&cm_id_priv->lock);
846 spin_lock_irq(&cm.lock);
a977049d 847 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
24be6e81 848 spin_unlock_irq(&cm.lock);
a977049d
HR		 849 break;
850 case IB_CM_SIDR_REQ_SENT:
851 cm_id->state = IB_CM_IDLE;
34816ad9 852 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
24be6e81 853 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 854 break;
855 case IB_CM_SIDR_REQ_RCVD:
24be6e81 856 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 857 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
858 break;
859 case IB_CM_REQ_SENT:
227eca83 860 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
24be6e81 861 spin_unlock_irq(&cm_id_priv->lock);
227eca83 862 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
e971b8cd
SH		 863 &cm_id_priv->id.device->node_guid,
864 sizeof cm_id_priv->id.device->node_guid,
227eca83
SH		 865 NULL, 0);
866 break;
04c33543
MT		 867 case IB_CM_REQ_RCVD:
868 if (err == -ENOMEM) {
869 /* Do not reject to allow future retries. */
870 cm_reset_to_idle(cm_id_priv);
24be6e81 871 spin_unlock_irq(&cm_id_priv->lock);
04c33543 872 } else {
24be6e81 873 spin_unlock_irq(&cm_id_priv->lock);
04c33543
MT		 874 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
875 NULL, 0, NULL, 0);
876 }
877 break;
a977049d
HR		 878 case IB_CM_MRA_REQ_RCVD:
879 case IB_CM_REP_SENT:
880 case IB_CM_MRA_REP_RCVD:
34816ad9 881 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 882 /* Fall through */
a977049d
HR		 883 case IB_CM_MRA_REQ_SENT:
884 case IB_CM_REP_RCVD:
885 case IB_CM_MRA_REP_SENT:
24be6e81 886 spin_unlock_irq(&cm_id_priv->lock);
227eca83
SH		 887 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
888 NULL, 0, NULL, 0);
a977049d
HR		 889 break;
890 case IB_CM_ESTABLISHED:
24be6e81 891 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 892 ib_send_cm_dreq(cm_id, NULL, 0);
893 goto retest;
894 case IB_CM_DREQ_SENT:
34816ad9 895 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 896 cm_enter_timewait(cm_id_priv);
24be6e81 897 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 898 break;
899 case IB_CM_DREQ_RCVD:
24be6e81 900 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 901 ib_send_cm_drep(cm_id, NULL, 0);
902 break;
903 default:
24be6e81 904 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 905 break;
906 }
907
908 cm_free_id(cm_id->local_id);
1b52fa98
SH		 909 cm_deref_id(cm_id_priv);
910 wait_for_completion(&cm_id_priv->comp);
a977049d
HR		 911 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
912 cm_free_work(work);
6e61d04f
SH		 913 kfree(cm_id_priv->compare_data);
914 kfree(cm_id_priv->private_data);
a977049d
HR		 915 kfree(cm_id_priv);
916}
04c33543
MT		 917
918void ib_destroy_cm_id(struct ib_cm_id *cm_id)
919{
920 cm_destroy_id(cm_id, 0);
921}
a977049d
HR		 922EXPORT_SYMBOL(ib_destroy_cm_id);
923
6e61d04f
SH		 924int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
925 struct ib_cm_compare_data *compare_data)
a977049d
HR		 926{
927 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
928 unsigned long flags;
929 int ret = 0;
930
9c3da099 931 service_mask = service_mask ? service_mask : ~cpu_to_be64(0);
a977049d
HR		 932 service_id &= service_mask;
933 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
934 (service_id != IB_CM_ASSIGN_SERVICE_ID))
935 return -EINVAL;
936
937 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
6e61d04f
SH		 938 if (cm_id->state != IB_CM_IDLE)
939 return -EINVAL;
940
941 if (compare_data) {
942 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
943 GFP_KERNEL);
944 if (!cm_id_priv->compare_data)
945 return -ENOMEM;
946 cm_mask_copy(cm_id_priv->compare_data->data,
947 compare_data->data, compare_data->mask);
948 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
949 IB_CM_COMPARE_SIZE);
950 }
a977049d
HR		 951
952 cm_id->state = IB_CM_LISTEN;
953
954 spin_lock_irqsave(&cm.lock, flags);
955 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
97f52eb4 956 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
9c3da099 957 cm_id->service_mask = ~cpu_to_be64(0);
a977049d
HR		 958 } else {
959 cm_id->service_id = service_id;
960 cm_id->service_mask = service_mask;
961 }
962 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
963 spin_unlock_irqrestore(&cm.lock, flags);
964
965 if (cur_cm_id_priv) {
966 cm_id->state = IB_CM_IDLE;
6e61d04f
SH		 967 kfree(cm_id_priv->compare_data);
968 cm_id_priv->compare_data = NULL;
a977049d
HR		 969 ret = -EBUSY;
970 }
971 return ret;
972}
973EXPORT_SYMBOL(ib_cm_listen);
974
97f52eb4
SH		 975static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
976 enum cm_msg_sequence msg_seq)
a977049d
HR		 977{
978 u64 hi_tid, low_tid;
979
980 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
97f52eb4
SH		 981 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
982 (msg_seq << 30));
a977049d
HR		 983 return cpu_to_be64(hi_tid | low_tid);
984}
985
986static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 987 __be16 attr_id, __be64 tid)
a977049d
HR		 988{
989 hdr->base_version = IB_MGMT_BASE_VERSION;
990 hdr->mgmt_class = IB_MGMT_CLASS_CM;
991 hdr->class_version = IB_CM_CLASS_VERSION;
992 hdr->method = IB_MGMT_METHOD_SEND;
993 hdr->attr_id = attr_id;
994 hdr->tid = tid;
995}
996
997static void cm_format_req(struct cm_req_msg *req_msg,
998 struct cm_id_private *cm_id_priv,
999 struct ib_cm_req_param *param)
1000{
3971c9f6
SH		 1001 struct ib_sa_path_rec *pri_path = param->primary_path;
1002 struct ib_sa_path_rec *alt_path = param->alternate_path;
1003
a977049d
HR		 1004 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
1005 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
1006
1007 req_msg->local_comm_id = cm_id_priv->id.local_id;
1008 req_msg->service_id = param->service_id;
e971b8cd 1009 req_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
a977049d 1010 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
a977049d
HR		 1011 cm_req_set_init_depth(req_msg, param->initiator_depth);
1012 cm_req_set_remote_resp_timeout(req_msg,
1013 param->remote_cm_response_timeout);
1014 cm_req_set_qp_type(req_msg, param->qp_type);
1015 cm_req_set_flow_ctrl(req_msg, param->flow_control);
1016 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
1017 cm_req_set_local_resp_timeout(req_msg,
1018 param->local_cm_response_timeout);
a977049d
HR		 1019 req_msg->pkey = param->primary_path->pkey;
1020 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
a977049d 1021 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
d26a360b
SH		 1022
1023 if (param->qp_type != IB_QPT_XRC_INI) {
1024 cm_req_set_resp_res(req_msg, param->responder_resources);
1025 cm_req_set_retry_count(req_msg, param->retry_count);
1026 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
1027 cm_req_set_srq(req_msg, param->srq);
1028 }
a977049d 1029
3971c9f6
SH		 1030 if (pri_path->hop_limit <= 1) {
1031 req_msg->primary_local_lid = pri_path->slid;
1032 req_msg->primary_remote_lid = pri_path->dlid;
1033 } else {
1034 /* Work-around until there's a way to obtain remote LID info */
1035 req_msg->primary_local_lid = IB_LID_PERMISSIVE;
1036 req_msg->primary_remote_lid = IB_LID_PERMISSIVE;
1037 }
1038 req_msg->primary_local_gid = pri_path->sgid;
1039 req_msg->primary_remote_gid = pri_path->dgid;
1040 cm_req_set_primary_flow_label(req_msg, pri_path->flow_label);
1041 cm_req_set_primary_packet_rate(req_msg, pri_path->rate);
1042 req_msg->primary_traffic_class = pri_path->traffic_class;
1043 req_msg->primary_hop_limit = pri_path->hop_limit;
1044 cm_req_set_primary_sl(req_msg, pri_path->sl);
1045 cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1));
a977049d 1046 cm_req_set_primary_local_ack_timeout(req_msg,
1d846126 1047 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
3971c9f6 1048 pri_path->packet_life_time));
a977049d 1049
3971c9f6
SH		 1050 if (alt_path) {
1051 if (alt_path->hop_limit <= 1) {
1052 req_msg->alt_local_lid = alt_path->slid;
1053 req_msg->alt_remote_lid = alt_path->dlid;
1054 } else {
1055 req_msg->alt_local_lid = IB_LID_PERMISSIVE;
1056 req_msg->alt_remote_lid = IB_LID_PERMISSIVE;
1057 }
1058 req_msg->alt_local_gid = alt_path->sgid;
1059 req_msg->alt_remote_gid = alt_path->dgid;
a977049d 1060 cm_req_set_alt_flow_label(req_msg,
3971c9f6
SH		 1061 alt_path->flow_label);
1062 cm_req_set_alt_packet_rate(req_msg, alt_path->rate);
1063 req_msg->alt_traffic_class = alt_path->traffic_class;
1064 req_msg->alt_hop_limit = alt_path->hop_limit;
1065 cm_req_set_alt_sl(req_msg, alt_path->sl);
1066 cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1));
a977049d 1067 cm_req_set_alt_local_ack_timeout(req_msg,
1d846126 1068 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
3971c9f6 1069 alt_path->packet_life_time));
a977049d
HR		 1070 }
1071
1072 if (param->private_data && param->private_data_len)
1073 memcpy(req_msg->private_data, param->private_data,
1074 param->private_data_len);
1075}
1076
858119e1 1077static int cm_validate_req_param(struct ib_cm_req_param *param)
a977049d
HR		 1078{
1079 /* peer-to-peer not supported */
1080 if (param->peer_to_peer)
1081 return -EINVAL;
1082
1083 if (!param->primary_path)
1084 return -EINVAL;
1085
d26a360b
SH		 1086 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC &&
1087 param->qp_type != IB_QPT_XRC_INI)
a977049d
HR		 1088 return -EINVAL;
1089
1090 if (param->private_data &&
1091 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
1092 return -EINVAL;
1093
1094 if (param->alternate_path &&
1095 (param->alternate_path->pkey != param->primary_path->pkey ||
1096 param->alternate_path->mtu != param->primary_path->mtu))
1097 return -EINVAL;
1098
1099 return 0;
1100}
1101
1102int ib_send_cm_req(struct ib_cm_id *cm_id,
1103 struct ib_cm_req_param *param)
1104{
1105 struct cm_id_private *cm_id_priv;
a977049d
HR		 1106 struct cm_req_msg *req_msg;
1107 unsigned long flags;
1108 int ret;
1109
1110 ret = cm_validate_req_param(param);
1111 if (ret)
1112 return ret;
1113
1114 /* Verify that we're not in timewait. */
1115 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1116 spin_lock_irqsave(&cm_id_priv->lock, flags);
1117 if (cm_id->state != IB_CM_IDLE) {
1118 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1119 ret = -EINVAL;
1120 goto out;
1121 }
1122 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1123
1124 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1125 id.local_id);
75df23e2
SH		 1126 if (IS_ERR(cm_id_priv->timewait_info)) {
1127 ret = PTR_ERR(cm_id_priv->timewait_info);
a977049d 1128 goto out;
75df23e2 1129 }
a977049d
HR		 1130
1131 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
1132 if (ret)
1133 goto error1;
1134 if (param->alternate_path) {
1135 ret = cm_init_av_by_path(param->alternate_path,
1136 &cm_id_priv->alt_av);
1137 if (ret)
1138 goto error1;
1139 }
1140 cm_id->service_id = param->service_id;
9c3da099 1141 cm_id->service_mask = ~cpu_to_be64(0);
a977049d
HR		 1142 cm_id_priv->timeout_ms = cm_convert_to_ms(
1143 param->primary_path->packet_life_time) * 2 +
1144 cm_convert_to_ms(
1145 param->remote_cm_response_timeout);
1146 cm_id_priv->max_cm_retries = param->max_cm_retries;
1147 cm_id_priv->initiator_depth = param->initiator_depth;
1148 cm_id_priv->responder_resources = param->responder_resources;
1149 cm_id_priv->retry_count = param->retry_count;
1150 cm_id_priv->path_mtu = param->primary_path->mtu;
e1444b5a 1151 cm_id_priv->pkey = param->primary_path->pkey;
ae7971a7 1152 cm_id_priv->qp_type = param->qp_type;
a977049d
HR		 1153
1154 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1155 if (ret)
1156 goto error1;
1157
1158 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1159 cm_format_req(req_msg, cm_id_priv, param);
1160 cm_id_priv->tid = req_msg->hdr.tid;
34816ad9 1161 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1162 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1163
1164 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1165 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
a977049d
HR		 1166
1167 spin_lock_irqsave(&cm_id_priv->lock, flags);
34816ad9 1168 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
a977049d
HR		 1169 if (ret) {
1170 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1171 goto error2;
1172 }
1173 BUG_ON(cm_id->state != IB_CM_IDLE);
1174 cm_id->state = IB_CM_REQ_SENT;
1175 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1176 return 0;
1177
1178error2: cm_free_msg(cm_id_priv->msg);
1179error1: kfree(cm_id_priv->timewait_info);
1180out: return ret;
1181}
1182EXPORT_SYMBOL(ib_send_cm_req);
1183
1184static int cm_issue_rej(struct cm_port *port,
1185 struct ib_mad_recv_wc *mad_recv_wc,
1186 enum ib_cm_rej_reason reason,
1187 enum cm_msg_response msg_rejected,
1188 void *ari, u8 ari_length)
1189{
1190 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1191 struct cm_rej_msg *rej_msg, *rcv_msg;
1192 int ret;
1193
1194 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1195 if (ret)
1196 return ret;
1197
1198 /* We just need common CM header information. Cast to any message. */
1199 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1200 rej_msg = (struct cm_rej_msg *) msg->mad;
1201
1202 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1203 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1204 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1205 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 1206 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1207
1208 if (ari && ari_length) {
1209 cm_rej_set_reject_info_len(rej_msg, ari_length);
1210 memcpy(rej_msg->ari, ari, ari_length);
1211 }
1212
34816ad9 1213 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1214 if (ret)
1215 cm_free_msg(msg);
1216
1217 return ret;
1218}
1219
97f52eb4
SH		 1220static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1221 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 1222{
1223 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1224 ((local_ca_guid == remote_ca_guid) &&
1225 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1226}
1227
858119e1 1228static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
a977049d
HR		 1229 struct ib_sa_path_rec *primary_path,
1230 struct ib_sa_path_rec *alt_path)
1231{
1232 memset(primary_path, 0, sizeof *primary_path);
1233 primary_path->dgid = req_msg->primary_local_gid;
1234 primary_path->sgid = req_msg->primary_remote_gid;
1235 primary_path->dlid = req_msg->primary_local_lid;
1236 primary_path->slid = req_msg->primary_remote_lid;
1237 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1238 primary_path->hop_limit = req_msg->primary_hop_limit;
1239 primary_path->traffic_class = req_msg->primary_traffic_class;
1240 primary_path->reversible = 1;
1241 primary_path->pkey = req_msg->pkey;
1242 primary_path->sl = cm_req_get_primary_sl(req_msg);
1243 primary_path->mtu_selector = IB_SA_EQ;
1244 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1245 primary_path->rate_selector = IB_SA_EQ;
1246 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1247 primary_path->packet_life_time_selector = IB_SA_EQ;
1248 primary_path->packet_life_time =
1249 cm_req_get_primary_local_ack_timeout(req_msg);
1250 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1251
1252 if (req_msg->alt_local_lid) {
1253 memset(alt_path, 0, sizeof *alt_path);
1254 alt_path->dgid = req_msg->alt_local_gid;
1255 alt_path->sgid = req_msg->alt_remote_gid;
1256 alt_path->dlid = req_msg->alt_local_lid;
1257 alt_path->slid = req_msg->alt_remote_lid;
1258 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1259 alt_path->hop_limit = req_msg->alt_hop_limit;
1260 alt_path->traffic_class = req_msg->alt_traffic_class;
1261 alt_path->reversible = 1;
1262 alt_path->pkey = req_msg->pkey;
1263 alt_path->sl = cm_req_get_alt_sl(req_msg);
1264 alt_path->mtu_selector = IB_SA_EQ;
1265 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1266 alt_path->rate_selector = IB_SA_EQ;
1267 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1268 alt_path->packet_life_time_selector = IB_SA_EQ;
1269 alt_path->packet_life_time =
1270 cm_req_get_alt_local_ack_timeout(req_msg);
1271 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1272 }
1273}
1274
1275static void cm_format_req_event(struct cm_work *work,
1276 struct cm_id_private *cm_id_priv,
1277 struct ib_cm_id *listen_id)
1278{
1279 struct cm_req_msg *req_msg;
1280 struct ib_cm_req_event_param *param;
1281
1282 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1283 param = &work->cm_event.param.req_rcvd;
1284 param->listen_id = listen_id;
a977049d
HR		 1285 param->port = cm_id_priv->av.port->port_num;
1286 param->primary_path = &work->path[0];
1287 if (req_msg->alt_local_lid)
1288 param->alternate_path = &work->path[1];
1289 else
1290 param->alternate_path = NULL;
1291 param->remote_ca_guid = req_msg->local_ca_guid;
1292 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1293 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1294 param->qp_type = cm_req_get_qp_type(req_msg);
1295 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1296 param->responder_resources = cm_req_get_init_depth(req_msg);
1297 param->initiator_depth = cm_req_get_resp_res(req_msg);
1298 param->local_cm_response_timeout =
1299 cm_req_get_remote_resp_timeout(req_msg);
1300 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1301 param->remote_cm_response_timeout =
1302 cm_req_get_local_resp_timeout(req_msg);
1303 param->retry_count = cm_req_get_retry_count(req_msg);
1304 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1305 param->srq = cm_req_get_srq(req_msg);
1306 work->cm_event.private_data = &req_msg->private_data;
1307}
1308
1309static void cm_process_work(struct cm_id_private *cm_id_priv,
1310 struct cm_work *work)
1311{
a977049d
HR		 1312 int ret;
1313
1314 /* We will typically only have the current event to report. */
1315 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1316 cm_free_work(work);
1317
1318 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
24be6e81 1319 spin_lock_irq(&cm_id_priv->lock);
a977049d 1320 work = cm_dequeue_work(cm_id_priv);
24be6e81 1321 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1322 BUG_ON(!work);
1323 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1324 &work->cm_event);
1325 cm_free_work(work);
1326 }
1327 cm_deref_id(cm_id_priv);
1328 if (ret)
04c33543 1329 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 1330}
1331
1332static void cm_format_mra(struct cm_mra_msg *mra_msg,
1333 struct cm_id_private *cm_id_priv,
1334 enum cm_msg_response msg_mraed, u8 service_timeout,
1335 const void *private_data, u8 private_data_len)
1336{
1337 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1338 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1339 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1340 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1341 cm_mra_set_service_timeout(mra_msg, service_timeout);
1342
1343 if (private_data && private_data_len)
1344 memcpy(mra_msg->private_data, private_data, private_data_len);
1345}
1346
1347static void cm_format_rej(struct cm_rej_msg *rej_msg,
1348 struct cm_id_private *cm_id_priv,
1349 enum ib_cm_rej_reason reason,
1350 void *ari,
1351 u8 ari_length,
1352 const void *private_data,
1353 u8 private_data_len)
1354{
1355 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1356 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1357
1358 switch(cm_id_priv->id.state) {
1359 case IB_CM_REQ_RCVD:
1360 rej_msg->local_comm_id = 0;
1361 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1362 break;
1363 case IB_CM_MRA_REQ_SENT:
1364 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1365 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1366 break;
1367 case IB_CM_REP_RCVD:
1368 case IB_CM_MRA_REP_SENT:
1369 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1370 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1371 break;
1372 default:
1373 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1374 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1375 break;
1376 }
1377
97f52eb4 1378 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1379 if (ari && ari_length) {
1380 cm_rej_set_reject_info_len(rej_msg, ari_length);
1381 memcpy(rej_msg->ari, ari, ari_length);
1382 }
1383
1384 if (private_data && private_data_len)
1385 memcpy(rej_msg->private_data, private_data, private_data_len);
1386}
1387
1388static void cm_dup_req_handler(struct cm_work *work,
1389 struct cm_id_private *cm_id_priv)
1390{
1391 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1392 int ret;
1393
9af57b7a
SH		 1394 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1395 counter[CM_REQ_COUNTER]);
1396
a977049d
HR		 1397 /* Quick state check to discard duplicate REQs. */
1398 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1399 return;
1400
1401 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1402 if (ret)
1403 return;
1404
24be6e81 1405 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 1406 switch (cm_id_priv->id.state) {
1407 case IB_CM_MRA_REQ_SENT:
1408 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1409 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1410 cm_id_priv->private_data,
1411 cm_id_priv->private_data_len);
1412 break;
1413 case IB_CM_TIMEWAIT:
1414 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1415 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1416 break;
1417 default:
1418 goto unlock;
1419 }
24be6e81 1420 spin_unlock_irq(&cm_id_priv->lock);
a977049d 1421
34816ad9 1422 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1423 if (ret)
1424 goto free;
1425 return;
1426
24be6e81 1427unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1428free: cm_free_msg(msg);
1429}
1430
1431static struct cm_id_private * cm_match_req(struct cm_work *work,
1432 struct cm_id_private *cm_id_priv)
1433{
1434 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1435 struct cm_timewait_info *timewait_info;
1436 struct cm_req_msg *req_msg;
a977049d
HR		 1437
1438 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1439
d998ccce 1440 /* Check for possible duplicate REQ. */
24be6e81 1441 spin_lock_irq(&cm.lock);
a977049d 1442 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
a977049d
HR		 1443 if (timewait_info) {
1444 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1445 timewait_info->work.remote_id);
24be6e81 1446 spin_unlock_irq(&cm.lock);
a977049d
HR		 1447 if (cur_cm_id_priv) {
1448 cm_dup_req_handler(work, cur_cm_id_priv);
1449 cm_deref_id(cur_cm_id_priv);
d998ccce
SH		 1450 }
1451 return NULL;
1452 }
1453
1454 /* Check for stale connections. */
1455 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1456 if (timewait_info) {
1457 cm_cleanup_timewait(cm_id_priv->timewait_info);
24be6e81 1458 spin_unlock_irq(&cm.lock);
d998ccce
SH		 1459 cm_issue_rej(work->port, work->mad_recv_wc,
1460 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1461 NULL, 0);
1462 return NULL;
a977049d
HR		 1463 }
1464
1465 /* Find matching listen request. */
07d357d0 1466 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
6e61d04f
SH		 1467 req_msg->service_id,
1468 req_msg->private_data);
a977049d 1469 if (!listen_cm_id_priv) {
8575329d 1470 cm_cleanup_timewait(cm_id_priv->timewait_info);
24be6e81 1471 spin_unlock_irq(&cm.lock);
a977049d
HR		 1472 cm_issue_rej(work->port, work->mad_recv_wc,
1473 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1474 NULL, 0);
8575329d 1475 goto out;
a977049d
HR		 1476 }
1477 atomic_inc(&listen_cm_id_priv->refcount);
1478 atomic_inc(&cm_id_priv->refcount);
1479 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1480 atomic_inc(&cm_id_priv->work_count);
24be6e81 1481 spin_unlock_irq(&cm.lock);
8575329d 1482out:
a977049d 1483 return listen_cm_id_priv;
a977049d
HR		 1484}
1485
3971c9f6
SH		 1486/*
1487 * Work-around for inter-subnet connections. If the LIDs are permissive,
1488 * we need to override the LID/SL data in the REQ with the LID information
1489 * in the work completion.
1490 */
1491static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
1492{
1493 if (!cm_req_get_primary_subnet_local(req_msg)) {
1494 if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) {
1495 req_msg->primary_local_lid = cpu_to_be16(wc->slid);
1496 cm_req_set_primary_sl(req_msg, wc->sl);
1497 }
1498
1499 if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE)
1500 req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits);
1501 }
1502
1503 if (!cm_req_get_alt_subnet_local(req_msg)) {
1504 if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) {
1505 req_msg->alt_local_lid = cpu_to_be16(wc->slid);
1506 cm_req_set_alt_sl(req_msg, wc->sl);
1507 }
1508
1509 if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE)
1510 req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits);
1511 }
1512}
1513
a977049d
HR		 1514static int cm_req_handler(struct cm_work *work)
1515{
1516 struct ib_cm_id *cm_id;
1517 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1518 struct cm_req_msg *req_msg;
1519 int ret;
1520
1521 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1522
d4c4196f 1523 cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
a977049d
HR		 1524 if (IS_ERR(cm_id))
1525 return PTR_ERR(cm_id);
1526
1527 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1528 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1529 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 1530 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 1531 &cm_id_priv->av);
1532 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1533 id.local_id);
1534 if (IS_ERR(cm_id_priv->timewait_info)) {
1535 ret = PTR_ERR(cm_id_priv->timewait_info);
76842405 1536 goto destroy;
a977049d
HR		 1537 }
1538 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1539 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1540 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1541
1542 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1543 if (!listen_cm_id_priv) {
1544 ret = -EINVAL;
76842405
SH		 1545 kfree(cm_id_priv->timewait_info);
1546 goto destroy;
a977049d
HR		 1547 }
1548
1549 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1550 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1551 cm_id_priv->id.service_id = req_msg->service_id;
9c3da099 1552 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
a977049d 1553
3971c9f6 1554 cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
a977049d
HR		 1555 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
1556 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
76842405 1557 if (ret) {
d4c4196f 1558 ib_get_cached_gid(work->port->cm_dev->ib_device,
76842405
SH		 1559 work->port->port_num, 0, &work->path[0].sgid);
1560 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1561 &work->path[0].sgid, sizeof work->path[0].sgid,
1562 NULL, 0);
1563 goto rejected;
1564 }
a977049d
HR		 1565 if (req_msg->alt_local_lid) {
1566 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
76842405
SH		 1567 if (ret) {
1568 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1569 &work->path[0].sgid,
1570 sizeof work->path[0].sgid, NULL, 0);
1571 goto rejected;
1572 }
a977049d
HR		 1573 }
1574 cm_id_priv->tid = req_msg->hdr.tid;
1575 cm_id_priv->timeout_ms = cm_convert_to_ms(
1576 cm_req_get_local_resp_timeout(req_msg));
1577 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1578 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1579 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1580 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1581 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
e1444b5a 1582 cm_id_priv->pkey = req_msg->pkey;
a977049d 1583 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
a977049d
HR		 1584 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1585 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
ae7971a7 1586 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
a977049d
HR		 1587
1588 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1589 cm_process_work(cm_id_priv, work);
1590 cm_deref_id(listen_cm_id_priv);
1591 return 0;
1592
76842405
SH		 1593rejected:
1594 atomic_dec(&cm_id_priv->refcount);
a977049d 1595 cm_deref_id(listen_cm_id_priv);
76842405
SH		 1596destroy:
1597 ib_destroy_cm_id(cm_id);
a977049d
HR		 1598 return ret;
1599}
1600
1601static void cm_format_rep(struct cm_rep_msg *rep_msg,
1602 struct cm_id_private *cm_id_priv,
1603 struct ib_cm_rep_param *param)
1604{
1605 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1606 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1607 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
a977049d
HR		 1608 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1609 rep_msg->resp_resources = param->responder_resources;
1d846126
SH		 1610 cm_rep_set_target_ack_delay(rep_msg,
1611 cm_id_priv->av.port->cm_dev->ack_delay);
a977049d 1612 cm_rep_set_failover(rep_msg, param->failover_accepted);
a977049d 1613 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
e971b8cd 1614 rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
a977049d 1615
d26a360b
SH		 1616 if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
1617 rep_msg->initiator_depth = param->initiator_depth;
1618 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1619 cm_rep_set_srq(rep_msg, param->srq);
ef700446 1620 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
d26a360b
SH		 1621 } else {
1622 cm_rep_set_srq(rep_msg, 1);
ef700446 1623 cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num));
d26a360b
SH		 1624 }
1625
a977049d
HR		 1626 if (param->private_data && param->private_data_len)
1627 memcpy(rep_msg->private_data, param->private_data,
1628 param->private_data_len);
1629}
1630
1631int ib_send_cm_rep(struct ib_cm_id *cm_id,
1632 struct ib_cm_rep_param *param)
1633{
1634 struct cm_id_private *cm_id_priv;
1635 struct ib_mad_send_buf *msg;
1636 struct cm_rep_msg *rep_msg;
a977049d
HR		 1637 unsigned long flags;
1638 int ret;
1639
1640 if (param->private_data &&
1641 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1642 return -EINVAL;
1643
1644 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1645 spin_lock_irqsave(&cm_id_priv->lock, flags);
1646 if (cm_id->state != IB_CM_REQ_RCVD &&
1647 cm_id->state != IB_CM_MRA_REQ_SENT) {
1648 ret = -EINVAL;
1649 goto out;
1650 }
1651
1652 ret = cm_alloc_msg(cm_id_priv, &msg);
1653 if (ret)
1654 goto out;
1655
1656 rep_msg = (struct cm_rep_msg *) msg->mad;
1657 cm_format_rep(rep_msg, cm_id_priv, param);
34816ad9 1658 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1659 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1660
34816ad9 1661 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1662 if (ret) {
1663 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1664 cm_free_msg(msg);
1665 return ret;
1666 }
1667
1668 cm_id->state = IB_CM_REP_SENT;
1669 cm_id_priv->msg = msg;
1670 cm_id_priv->initiator_depth = param->initiator_depth;
1671 cm_id_priv->responder_resources = param->responder_resources;
1672 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
ef700446 1673 cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
a977049d
HR		 1674
1675out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1676 return ret;
1677}
1678EXPORT_SYMBOL(ib_send_cm_rep);
1679
1680static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1681 struct cm_id_private *cm_id_priv,
1682 const void *private_data,
1683 u8 private_data_len)
1684{
1685 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1686 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1687 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1688
1689 if (private_data && private_data_len)
1690 memcpy(rtu_msg->private_data, private_data, private_data_len);
1691}
1692
1693int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1694 const void *private_data,
1695 u8 private_data_len)
1696{
1697 struct cm_id_private *cm_id_priv;
1698 struct ib_mad_send_buf *msg;
a977049d
HR		 1699 unsigned long flags;
1700 void *data;
1701 int ret;
1702
1703 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1704 return -EINVAL;
1705
1706 data = cm_copy_private_data(private_data, private_data_len);
1707 if (IS_ERR(data))
1708 return PTR_ERR(data);
1709
1710 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1711 spin_lock_irqsave(&cm_id_priv->lock, flags);
1712 if (cm_id->state != IB_CM_REP_RCVD &&
1713 cm_id->state != IB_CM_MRA_REP_SENT) {
1714 ret = -EINVAL;
1715 goto error;
1716 }
1717
1718 ret = cm_alloc_msg(cm_id_priv, &msg);
1719 if (ret)
1720 goto error;
1721
1722 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1723 private_data, private_data_len);
1724
34816ad9 1725 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1726 if (ret) {
1727 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1728 cm_free_msg(msg);
1729 kfree(data);
1730 return ret;
1731 }
1732
1733 cm_id->state = IB_CM_ESTABLISHED;
1734 cm_set_private_data(cm_id_priv, data, private_data_len);
1735 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1736 return 0;
1737
1738error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1739 kfree(data);
1740 return ret;
1741}
1742EXPORT_SYMBOL(ib_send_cm_rtu);
1743
ef700446 1744static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type)
a977049d
HR		 1745{
1746 struct cm_rep_msg *rep_msg;
1747 struct ib_cm_rep_event_param *param;
1748
1749 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1750 param = &work->cm_event.param.rep_rcvd;
1751 param->remote_ca_guid = rep_msg->local_ca_guid;
1752 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
ef700446 1753 param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type));
a977049d
HR		 1754 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1755 param->responder_resources = rep_msg->initiator_depth;
1756 param->initiator_depth = rep_msg->resp_resources;
1757 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1758 param->failover_accepted = cm_rep_get_failover(rep_msg);
1759 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1760 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1761 param->srq = cm_rep_get_srq(rep_msg);
1762 work->cm_event.private_data = &rep_msg->private_data;
1763}
1764
1765static void cm_dup_rep_handler(struct cm_work *work)
1766{
1767 struct cm_id_private *cm_id_priv;
1768 struct cm_rep_msg *rep_msg;
1769 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1770 int ret;
1771
1772 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1773 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1774 rep_msg->local_comm_id);
1775 if (!cm_id_priv)
1776 return;
1777
9af57b7a
SH		 1778 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1779 counter[CM_REP_COUNTER]);
a977049d
HR		 1780 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1781 if (ret)
1782 goto deref;
1783
24be6e81 1784 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 1785 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1786 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1787 cm_id_priv->private_data,
1788 cm_id_priv->private_data_len);
1789 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1790 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1791 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1792 cm_id_priv->private_data,
1793 cm_id_priv->private_data_len);
1794 else
1795 goto unlock;
24be6e81 1796 spin_unlock_irq(&cm_id_priv->lock);
a977049d 1797
34816ad9 1798 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1799 if (ret)
1800 goto free;
1801 goto deref;
1802
24be6e81 1803unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1804free: cm_free_msg(msg);
1805deref: cm_deref_id(cm_id_priv);
1806}
1807
1808static int cm_rep_handler(struct cm_work *work)
1809{
1810 struct cm_id_private *cm_id_priv;
1811 struct cm_rep_msg *rep_msg;
a977049d
HR		 1812 int ret;
1813
1814 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1815 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1816 if (!cm_id_priv) {
1817 cm_dup_rep_handler(work);
1818 return -EINVAL;
1819 }
1820
ef700446 1821 cm_format_rep_event(work, cm_id_priv->qp_type);
87fd1a11 1822
24be6e81 1823 spin_lock_irq(&cm_id_priv->lock);
87fd1a11
SH		 1824 switch (cm_id_priv->id.state) {
1825 case IB_CM_REQ_SENT:
1826 case IB_CM_MRA_REQ_RCVD:
1827 break;
1828 default:
24be6e81 1829 spin_unlock_irq(&cm_id_priv->lock);
87fd1a11
SH		 1830 ret = -EINVAL;
1831 goto error;
1832 }
1833
a977049d
HR		 1834 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1835 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
ef700446 1836 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
a977049d 1837
87fd1a11 1838 spin_lock(&cm.lock);
a977049d
HR		 1839 /* Check for duplicate REP. */
1840 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
87fd1a11 1841 spin_unlock(&cm.lock);
24be6e81 1842 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1843 ret = -EINVAL;
1844 goto error;
1845 }
1846 /* Check for a stale connection. */
1847 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1848 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1849 &cm.remote_id_table);
1850 cm_id_priv->timewait_info->inserted_remote_id = 0;
1851 spin_unlock(&cm.lock);
24be6e81 1852 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1853 cm_issue_rej(work->port, work->mad_recv_wc,
1854 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1855 NULL, 0);
1856 ret = -EINVAL;
1857 goto error;
1858 }
87fd1a11 1859 spin_unlock(&cm.lock);
a977049d 1860
a977049d
HR		 1861 cm_id_priv->id.state = IB_CM_REP_RCVD;
1862 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
ef700446 1863 cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
a977049d
HR		 1864 cm_id_priv->initiator_depth = rep_msg->resp_resources;
1865 cm_id_priv->responder_resources = rep_msg->initiator_depth;
1866 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
1867 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1d846126
SH		 1868 cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1869 cm_id_priv->av.timeout =
1870 cm_ack_timeout(cm_id_priv->target_ack_delay,
1871 cm_id_priv->av.timeout - 1);
1872 cm_id_priv->alt_av.timeout =
1873 cm_ack_timeout(cm_id_priv->target_ack_delay,
1874 cm_id_priv->alt_av.timeout - 1);
a977049d
HR		 1875
1876 /* todo: handle peer_to_peer */
1877
34816ad9 1878 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1879 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1880 if (!ret)
1881 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 1882 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1883
1884 if (ret)
1885 cm_process_work(cm_id_priv, work);
1886 else
1887 cm_deref_id(cm_id_priv);
1888 return 0;
1889
87fd1a11 1890error:
a977049d
HR		 1891 cm_deref_id(cm_id_priv);
1892 return ret;
1893}
1894
1895static int cm_establish_handler(struct cm_work *work)
1896{
1897 struct cm_id_private *cm_id_priv;
a977049d
HR		 1898 int ret;
1899
e1444b5a 1900 /* See comment in cm_establish about lookup. */
a977049d
HR		 1901 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
1902 if (!cm_id_priv)
1903 return -EINVAL;
1904
24be6e81 1905 spin_lock_irq(&cm_id_priv->lock);
a977049d 1906 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
24be6e81 1907 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1908 goto out;
1909 }
1910
34816ad9 1911 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1912 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1913 if (!ret)
1914 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 1915 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1916
1917 if (ret)
1918 cm_process_work(cm_id_priv, work);
1919 else
1920 cm_deref_id(cm_id_priv);
1921 return 0;
1922out:
1923 cm_deref_id(cm_id_priv);
1924 return -EINVAL;
1925}
1926
1927static int cm_rtu_handler(struct cm_work *work)
1928{
1929 struct cm_id_private *cm_id_priv;
1930 struct cm_rtu_msg *rtu_msg;
a977049d
HR		 1931 int ret;
1932
1933 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
1934 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
1935 rtu_msg->local_comm_id);
1936 if (!cm_id_priv)
1937 return -EINVAL;
1938
1939 work->cm_event.private_data = &rtu_msg->private_data;
1940
24be6e81 1941 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 1942 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
1943 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
24be6e81 1944 spin_unlock_irq(&cm_id_priv->lock);
9af57b7a
SH		 1945 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1946 counter[CM_RTU_COUNTER]);
a977049d
HR		 1947 goto out;
1948 }
1949 cm_id_priv->id.state = IB_CM_ESTABLISHED;
1950
34816ad9 1951 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 1952 ret = atomic_inc_and_test(&cm_id_priv->work_count);
1953 if (!ret)
1954 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 1955 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1956
1957 if (ret)
1958 cm_process_work(cm_id_priv, work);
1959 else
1960 cm_deref_id(cm_id_priv);
1961 return 0;
1962out:
1963 cm_deref_id(cm_id_priv);
1964 return -EINVAL;
1965}
1966
1967static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
1968 struct cm_id_private *cm_id_priv,
1969 const void *private_data,
1970 u8 private_data_len)
1971{
1972 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
1973 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
1974 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
1975 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
1976 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
1977
1978 if (private_data && private_data_len)
1979 memcpy(dreq_msg->private_data, private_data, private_data_len);
1980}
1981
1982int ib_send_cm_dreq(struct ib_cm_id *cm_id,
1983 const void *private_data,
1984 u8 private_data_len)
1985{
1986 struct cm_id_private *cm_id_priv;
1987 struct ib_mad_send_buf *msg;
a977049d
HR		 1988 unsigned long flags;
1989 int ret;
1990
1991 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
1992 return -EINVAL;
1993
1994 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1995 spin_lock_irqsave(&cm_id_priv->lock, flags);
1996 if (cm_id->state != IB_CM_ESTABLISHED) {
1997 ret = -EINVAL;
1998 goto out;
1999 }
2000
8d8ac865
SH		 2001 if (cm_id->lap_state == IB_CM_LAP_SENT ||
2002 cm_id->lap_state == IB_CM_MRA_LAP_RCVD)
2003 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2004
a977049d
HR		 2005 ret = cm_alloc_msg(cm_id_priv, &msg);
2006 if (ret) {
2007 cm_enter_timewait(cm_id_priv);
2008 goto out;
2009 }
2010
2011 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
2012 private_data, private_data_len);
34816ad9 2013 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2014 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
2015
34816ad9 2016 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2017 if (ret) {
2018 cm_enter_timewait(cm_id_priv);
2019 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2020 cm_free_msg(msg);
2021 return ret;
2022 }
2023
2024 cm_id->state = IB_CM_DREQ_SENT;
2025 cm_id_priv->msg = msg;
2026out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2027 return ret;
2028}
2029EXPORT_SYMBOL(ib_send_cm_dreq);
2030
2031static void cm_format_drep(struct cm_drep_msg *drep_msg,
2032 struct cm_id_private *cm_id_priv,
2033 const void *private_data,
2034 u8 private_data_len)
2035{
2036 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
2037 drep_msg->local_comm_id = cm_id_priv->id.local_id;
2038 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
2039
2040 if (private_data && private_data_len)
2041 memcpy(drep_msg->private_data, private_data, private_data_len);
2042}
2043
2044int ib_send_cm_drep(struct ib_cm_id *cm_id,
2045 const void *private_data,
2046 u8 private_data_len)
2047{
2048 struct cm_id_private *cm_id_priv;
2049 struct ib_mad_send_buf *msg;
a977049d
HR		 2050 unsigned long flags;
2051 void *data;
2052 int ret;
2053
2054 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
2055 return -EINVAL;
2056
2057 data = cm_copy_private_data(private_data, private_data_len);
2058 if (IS_ERR(data))
2059 return PTR_ERR(data);
2060
2061 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2062 spin_lock_irqsave(&cm_id_priv->lock, flags);
2063 if (cm_id->state != IB_CM_DREQ_RCVD) {
2064 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2065 kfree(data);
2066 return -EINVAL;
2067 }
2068
2069 cm_set_private_data(cm_id_priv, data, private_data_len);
2070 cm_enter_timewait(cm_id_priv);
2071
2072 ret = cm_alloc_msg(cm_id_priv, &msg);
2073 if (ret)
2074 goto out;
2075
2076 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2077 private_data, private_data_len);
2078
34816ad9 2079 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2080 if (ret) {
2081 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2082 cm_free_msg(msg);
2083 return ret;
2084 }
2085
2086out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2087 return ret;
2088}
2089EXPORT_SYMBOL(ib_send_cm_drep);
2090
82a9c16a
SH		 2091static int cm_issue_drep(struct cm_port *port,
2092 struct ib_mad_recv_wc *mad_recv_wc)
2093{
2094 struct ib_mad_send_buf *msg = NULL;
2095 struct cm_dreq_msg *dreq_msg;
2096 struct cm_drep_msg *drep_msg;
2097 int ret;
2098
2099 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
2100 if (ret)
2101 return ret;
2102
2103 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
2104 drep_msg = (struct cm_drep_msg *) msg->mad;
2105
2106 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
2107 drep_msg->remote_comm_id = dreq_msg->local_comm_id;
2108 drep_msg->local_comm_id = dreq_msg->remote_comm_id;
2109
2110 ret = ib_post_send_mad(msg, NULL);
2111 if (ret)
2112 cm_free_msg(msg);
2113
2114 return ret;
2115}
2116
a977049d
HR		 2117static int cm_dreq_handler(struct cm_work *work)
2118{
2119 struct cm_id_private *cm_id_priv;
2120 struct cm_dreq_msg *dreq_msg;
2121 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2122 int ret;
2123
2124 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
2125 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
2126 dreq_msg->local_comm_id);
82a9c16a 2127 if (!cm_id_priv) {
9af57b7a
SH		 2128 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2129 counter[CM_DREQ_COUNTER]);
82a9c16a 2130 cm_issue_drep(work->port, work->mad_recv_wc);
a977049d 2131 return -EINVAL;
82a9c16a 2132 }
a977049d
HR		 2133
2134 work->cm_event.private_data = &dreq_msg->private_data;
2135
24be6e81 2136 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2137 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
2138 goto unlock;
2139
2140 switch (cm_id_priv->id.state) {
2141 case IB_CM_REP_SENT:
2142 case IB_CM_DREQ_SENT:
34816ad9 2143 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2144 break;
2145 case IB_CM_ESTABLISHED:
8d8ac865
SH		 2146 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
2147 cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2148 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2149 break;
a977049d
HR		 2150 case IB_CM_MRA_REP_RCVD:
2151 break;
2152 case IB_CM_TIMEWAIT:
9af57b7a
SH		 2153 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2154 counter[CM_DREQ_COUNTER]);
a977049d
HR		 2155 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2156 goto unlock;
2157
2158 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2159 cm_id_priv->private_data,
2160 cm_id_priv->private_data_len);
24be6e81 2161 spin_unlock_irq(&cm_id_priv->lock);
a977049d 2162
34816ad9 2163 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2164 cm_free_msg(msg);
2165 goto deref;
9af57b7a
SH		 2166 case IB_CM_DREQ_RCVD:
2167 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2168 counter[CM_DREQ_COUNTER]);
2169 goto unlock;
a977049d
HR		 2170 default:
2171 goto unlock;
2172 }
2173 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
2174 cm_id_priv->tid = dreq_msg->hdr.tid;
2175 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2176 if (!ret)
2177 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2178 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2179
2180 if (ret)
2181 cm_process_work(cm_id_priv, work);
2182 else
2183 cm_deref_id(cm_id_priv);
2184 return 0;
2185
24be6e81 2186unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2187deref: cm_deref_id(cm_id_priv);
2188 return -EINVAL;
2189}
2190
2191static int cm_drep_handler(struct cm_work *work)
2192{
2193 struct cm_id_private *cm_id_priv;
2194 struct cm_drep_msg *drep_msg;
a977049d
HR		 2195 int ret;
2196
2197 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
2198 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
2199 drep_msg->local_comm_id);
2200 if (!cm_id_priv)
2201 return -EINVAL;
2202
2203 work->cm_event.private_data = &drep_msg->private_data;
2204
24be6e81 2205 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2206 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2207 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
24be6e81 2208 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2209 goto out;
2210 }
2211 cm_enter_timewait(cm_id_priv);
2212
34816ad9 2213 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2214 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2215 if (!ret)
2216 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2217 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2218
2219 if (ret)
2220 cm_process_work(cm_id_priv, work);
2221 else
2222 cm_deref_id(cm_id_priv);
2223 return 0;
2224out:
2225 cm_deref_id(cm_id_priv);
2226 return -EINVAL;
2227}
2228
2229int ib_send_cm_rej(struct ib_cm_id *cm_id,
2230 enum ib_cm_rej_reason reason,
2231 void *ari,
2232 u8 ari_length,
2233 const void *private_data,
2234 u8 private_data_len)
2235{
2236 struct cm_id_private *cm_id_priv;
2237 struct ib_mad_send_buf *msg;
a977049d
HR		 2238 unsigned long flags;
2239 int ret;
2240
2241 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2242 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2243 return -EINVAL;
2244
2245 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2246
2247 spin_lock_irqsave(&cm_id_priv->lock, flags);
2248 switch (cm_id->state) {
2249 case IB_CM_REQ_SENT:
2250 case IB_CM_MRA_REQ_RCVD:
2251 case IB_CM_REQ_RCVD:
2252 case IB_CM_MRA_REQ_SENT:
2253 case IB_CM_REP_RCVD:
2254 case IB_CM_MRA_REP_SENT:
2255 ret = cm_alloc_msg(cm_id_priv, &msg);
2256 if (!ret)
2257 cm_format_rej((struct cm_rej_msg *) msg->mad,
2258 cm_id_priv, reason, ari, ari_length,
2259 private_data, private_data_len);
2260
2261 cm_reset_to_idle(cm_id_priv);
2262 break;
2263 case IB_CM_REP_SENT:
2264 case IB_CM_MRA_REP_RCVD:
2265 ret = cm_alloc_msg(cm_id_priv, &msg);
2266 if (!ret)
2267 cm_format_rej((struct cm_rej_msg *) msg->mad,
2268 cm_id_priv, reason, ari, ari_length,
2269 private_data, private_data_len);
2270
2271 cm_enter_timewait(cm_id_priv);
2272 break;
2273 default:
2274 ret = -EINVAL;
2275 goto out;
2276 }
2277
2278 if (ret)
2279 goto out;
2280
34816ad9 2281 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2282 if (ret)
2283 cm_free_msg(msg);
2284
2285out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2286 return ret;
2287}
2288EXPORT_SYMBOL(ib_send_cm_rej);
2289
2290static void cm_format_rej_event(struct cm_work *work)
2291{
2292 struct cm_rej_msg *rej_msg;
2293 struct ib_cm_rej_event_param *param;
2294
2295 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2296 param = &work->cm_event.param.rej_rcvd;
2297 param->ari = rej_msg->ari;
2298 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 2299 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 2300 work->cm_event.private_data = &rej_msg->private_data;
2301}
2302
2303static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2304{
2305 struct cm_timewait_info *timewait_info;
2306 struct cm_id_private *cm_id_priv;
97f52eb4 2307 __be32 remote_id;
a977049d
HR		 2308
2309 remote_id = rej_msg->local_comm_id;
2310
97f52eb4 2311 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
24be6e81 2312 spin_lock_irq(&cm.lock);
97f52eb4 2313 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 2314 remote_id);
2315 if (!timewait_info) {
24be6e81 2316 spin_unlock_irq(&cm.lock);
a977049d
HR		 2317 return NULL;
2318 }
f06d2653
SH		 2319 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2320 (timewait_info->work.local_id ^
2321 cm.random_id_operand));
a977049d
HR		 2322 if (cm_id_priv) {
2323 if (cm_id_priv->id.remote_id == remote_id)
2324 atomic_inc(&cm_id_priv->refcount);
2325 else
2326 cm_id_priv = NULL;
2327 }
24be6e81 2328 spin_unlock_irq(&cm.lock);
a977049d
HR		 2329 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2330 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2331 else
2332 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2333
2334 return cm_id_priv;
2335}
2336
2337static int cm_rej_handler(struct cm_work *work)
2338{
2339 struct cm_id_private *cm_id_priv;
2340 struct cm_rej_msg *rej_msg;
a977049d
HR		 2341 int ret;
2342
2343 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2344 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2345 if (!cm_id_priv)
2346 return -EINVAL;
2347
2348 cm_format_rej_event(work);
2349
24be6e81 2350 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2351 switch (cm_id_priv->id.state) {
2352 case IB_CM_REQ_SENT:
2353 case IB_CM_MRA_REQ_RCVD:
2354 case IB_CM_REP_SENT:
2355 case IB_CM_MRA_REP_RCVD:
34816ad9 2356 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2357 /* fall through */
2358 case IB_CM_REQ_RCVD:
2359 case IB_CM_MRA_REQ_SENT:
97f52eb4 2360 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2361 cm_enter_timewait(cm_id_priv);
2362 else
2363 cm_reset_to_idle(cm_id_priv);
2364 break;
2365 case IB_CM_DREQ_SENT:
34816ad9 2366 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2367 /* fall through */
2368 case IB_CM_REP_RCVD:
2369 case IB_CM_MRA_REP_SENT:
a977049d
HR		 2370 cm_enter_timewait(cm_id_priv);
2371 break;
8d8ac865
SH		 2372 case IB_CM_ESTABLISHED:
2373 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT ||
2374 cm_id_priv->id.lap_state == IB_CM_LAP_SENT) {
2375 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT)
2376 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2377 cm_id_priv->msg);
2378 cm_enter_timewait(cm_id_priv);
2379 break;
2380 }
2381 /* fall through */
a977049d 2382 default:
24be6e81 2383 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2384 ret = -EINVAL;
2385 goto out;
2386 }
2387
2388 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2389 if (!ret)
2390 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2391 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2392
2393 if (ret)
2394 cm_process_work(cm_id_priv, work);
2395 else
2396 cm_deref_id(cm_id_priv);
2397 return 0;
2398out:
2399 cm_deref_id(cm_id_priv);
2400 return -EINVAL;
2401}
2402
2403int ib_send_cm_mra(struct ib_cm_id *cm_id,
2404 u8 service_timeout,
2405 const void *private_data,
2406 u8 private_data_len)
2407{
2408 struct cm_id_private *cm_id_priv;
2409 struct ib_mad_send_buf *msg;
de98b693
SH		 2410 enum ib_cm_state cm_state;
2411 enum ib_cm_lap_state lap_state;
2412 enum cm_msg_response msg_response;
a977049d
HR		 2413 void *data;
2414 unsigned long flags;
2415 int ret;
2416
2417 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2418 return -EINVAL;
2419
2420 data = cm_copy_private_data(private_data, private_data_len);
2421 if (IS_ERR(data))
2422 return PTR_ERR(data);
2423
2424 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2425
2426 spin_lock_irqsave(&cm_id_priv->lock, flags);
2427 switch(cm_id_priv->id.state) {
2428 case IB_CM_REQ_RCVD:
de98b693
SH		 2429 cm_state = IB_CM_MRA_REQ_SENT;
2430 lap_state = cm_id->lap_state;
2431 msg_response = CM_MSG_RESPONSE_REQ;
a977049d
HR		 2432 break;
2433 case IB_CM_REP_RCVD:
de98b693
SH		 2434 cm_state = IB_CM_MRA_REP_SENT;
2435 lap_state = cm_id->lap_state;
2436 msg_response = CM_MSG_RESPONSE_REP;
a977049d
HR		 2437 break;
2438 case IB_CM_ESTABLISHED:
50a025c6
SH		 2439 if (cm_id->lap_state == IB_CM_LAP_RCVD) {
2440 cm_state = cm_id->state;
2441 lap_state = IB_CM_MRA_LAP_SENT;
2442 msg_response = CM_MSG_RESPONSE_OTHER;
2443 break;
2444 }
de98b693
SH		 2445 default:
2446 ret = -EINVAL;
2447 goto error1;
2448 }
2449
2450 if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) {
a977049d
HR		 2451 ret = cm_alloc_msg(cm_id_priv, &msg);
2452 if (ret)
2453 goto error1;
2454
2455 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
de98b693 2456 msg_response, service_timeout,
a977049d 2457 private_data, private_data_len);
34816ad9 2458 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2459 if (ret)
2460 goto error2;
a977049d 2461 }
de98b693
SH		 2462
2463 cm_id->state = cm_state;
2464 cm_id->lap_state = lap_state;
a977049d
HR		 2465 cm_id_priv->service_timeout = service_timeout;
2466 cm_set_private_data(cm_id_priv, data, private_data_len);
2467 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2468 return 0;
2469
2470error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2471 kfree(data);
2472 return ret;
2473
2474error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2475 kfree(data);
2476 cm_free_msg(msg);
2477 return ret;
2478}
2479EXPORT_SYMBOL(ib_send_cm_mra);
2480
2481static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2482{
2483 switch (cm_mra_get_msg_mraed(mra_msg)) {
2484 case CM_MSG_RESPONSE_REQ:
2485 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2486 case CM_MSG_RESPONSE_REP:
2487 case CM_MSG_RESPONSE_OTHER:
2488 return cm_acquire_id(mra_msg->remote_comm_id,
2489 mra_msg->local_comm_id);
2490 default:
2491 return NULL;
2492 }
2493}
2494
2495static int cm_mra_handler(struct cm_work *work)
2496{
2497 struct cm_id_private *cm_id_priv;
2498 struct cm_mra_msg *mra_msg;
a977049d
HR		 2499 int timeout, ret;
2500
2501 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2502 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2503 if (!cm_id_priv)
2504 return -EINVAL;
2505
2506 work->cm_event.private_data = &mra_msg->private_data;
2507 work->cm_event.param.mra_rcvd.service_timeout =
2508 cm_mra_get_service_timeout(mra_msg);
2509 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
1d846126 2510 cm_convert_to_ms(cm_id_priv->av.timeout);
a977049d 2511
24be6e81 2512 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2513 switch (cm_id_priv->id.state) {
2514 case IB_CM_REQ_SENT:
2515 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2516 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2517 cm_id_priv->msg, timeout))
a977049d
HR		 2518 goto out;
2519 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2520 break;
2521 case IB_CM_REP_SENT:
2522 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2523 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2524 cm_id_priv->msg, timeout))
a977049d
HR		 2525 goto out;
2526 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2527 break;
2528 case IB_CM_ESTABLISHED:
2529 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2530 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2531 ib_modify_mad(cm_id_priv->av.port->mad_agent,
9af57b7a
SH		 2532 cm_id_priv->msg, timeout)) {
2533 if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2534 atomic_long_inc(&work->port->
2535 counter_group[CM_RECV_DUPLICATES].
2536 counter[CM_MRA_COUNTER]);
a977049d 2537 goto out;
9af57b7a 2538 }
a977049d
HR		 2539 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2540 break;
9af57b7a
SH		 2541 case IB_CM_MRA_REQ_RCVD:
2542 case IB_CM_MRA_REP_RCVD:
2543 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2544 counter[CM_MRA_COUNTER]);
2545 /* fall through */
a977049d
HR		 2546 default:
2547 goto out;
2548 }
2549
2550 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2551 cm_id_priv->id.state;
2552 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2553 if (!ret)
2554 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2555 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2556
2557 if (ret)
2558 cm_process_work(cm_id_priv, work);
2559 else
2560 cm_deref_id(cm_id_priv);
2561 return 0;
2562out:
24be6e81 2563 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2564 cm_deref_id(cm_id_priv);
2565 return -EINVAL;
2566}
2567
2568static void cm_format_lap(struct cm_lap_msg *lap_msg,
2569 struct cm_id_private *cm_id_priv,
2570 struct ib_sa_path_rec *alternate_path,
2571 const void *private_data,
2572 u8 private_data_len)
2573{
2574 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2575 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2576 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2577 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2578 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2579 /* todo: need remote CM response timeout */
2580 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2581 lap_msg->alt_local_lid = alternate_path->slid;
2582 lap_msg->alt_remote_lid = alternate_path->dlid;
2583 lap_msg->alt_local_gid = alternate_path->sgid;
2584 lap_msg->alt_remote_gid = alternate_path->dgid;
2585 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2586 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2587 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2588 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2589 cm_lap_set_sl(lap_msg, alternate_path->sl);
2590 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2591 cm_lap_set_local_ack_timeout(lap_msg,
1d846126
SH		 2592 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
2593 alternate_path->packet_life_time));
a977049d
HR		 2594
2595 if (private_data && private_data_len)
2596 memcpy(lap_msg->private_data, private_data, private_data_len);
2597}
2598
2599int ib_send_cm_lap(struct ib_cm_id *cm_id,
2600 struct ib_sa_path_rec *alternate_path,
2601 const void *private_data,
2602 u8 private_data_len)
2603{
2604 struct cm_id_private *cm_id_priv;
2605 struct ib_mad_send_buf *msg;
a977049d
HR		 2606 unsigned long flags;
2607 int ret;
2608
2609 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2610 return -EINVAL;
2611
2612 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2613 spin_lock_irqsave(&cm_id_priv->lock, flags);
2614 if (cm_id->state != IB_CM_ESTABLISHED ||
e1444b5a
SH		 2615 (cm_id->lap_state != IB_CM_LAP_UNINIT &&
2616 cm_id->lap_state != IB_CM_LAP_IDLE)) {
a977049d
HR		 2617 ret = -EINVAL;
2618 goto out;
2619 }
2620
e1444b5a
SH		 2621 ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av);
2622 if (ret)
2623 goto out;
1d846126
SH		 2624 cm_id_priv->alt_av.timeout =
2625 cm_ack_timeout(cm_id_priv->target_ack_delay,
2626 cm_id_priv->alt_av.timeout - 1);
e1444b5a 2627
a977049d
HR		 2628 ret = cm_alloc_msg(cm_id_priv, &msg);
2629 if (ret)
2630 goto out;
2631
2632 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2633 alternate_path, private_data, private_data_len);
34816ad9 2634 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2635 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2636
34816ad9 2637 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2638 if (ret) {
2639 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2640 cm_free_msg(msg);
2641 return ret;
2642 }
2643
2644 cm_id->lap_state = IB_CM_LAP_SENT;
2645 cm_id_priv->msg = msg;
2646
2647out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2648 return ret;
2649}
2650EXPORT_SYMBOL(ib_send_cm_lap);
2651
e1444b5a
SH		 2652static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
2653 struct ib_sa_path_rec *path,
a977049d
HR		 2654 struct cm_lap_msg *lap_msg)
2655{
2656 memset(path, 0, sizeof *path);
2657 path->dgid = lap_msg->alt_local_gid;
2658 path->sgid = lap_msg->alt_remote_gid;
2659 path->dlid = lap_msg->alt_local_lid;
2660 path->slid = lap_msg->alt_remote_lid;
2661 path->flow_label = cm_lap_get_flow_label(lap_msg);
2662 path->hop_limit = lap_msg->alt_hop_limit;
2663 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2664 path->reversible = 1;
e1444b5a 2665 path->pkey = cm_id_priv->pkey;
a977049d
HR		 2666 path->sl = cm_lap_get_sl(lap_msg);
2667 path->mtu_selector = IB_SA_EQ;
e1444b5a 2668 path->mtu = cm_id_priv->path_mtu;
a977049d
HR		 2669 path->rate_selector = IB_SA_EQ;
2670 path->rate = cm_lap_get_packet_rate(lap_msg);
2671 path->packet_life_time_selector = IB_SA_EQ;
2672 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2673 path->packet_life_time -= (path->packet_life_time > 0);
2674}
2675
2676static int cm_lap_handler(struct cm_work *work)
2677{
2678 struct cm_id_private *cm_id_priv;
2679 struct cm_lap_msg *lap_msg;
2680 struct ib_cm_lap_event_param *param;
2681 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2682 int ret;
2683
2684 /* todo: verify LAP request and send reject APR if invalid. */
2685 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2686 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2687 lap_msg->local_comm_id);
2688 if (!cm_id_priv)
2689 return -EINVAL;
2690
2691 param = &work->cm_event.param.lap_rcvd;
2692 param->alternate_path = &work->path[0];
e1444b5a 2693 cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
a977049d
HR		 2694 work->cm_event.private_data = &lap_msg->private_data;
2695
24be6e81 2696 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2697 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2698 goto unlock;
2699
2700 switch (cm_id_priv->id.lap_state) {
e1444b5a 2701 case IB_CM_LAP_UNINIT:
a977049d
HR		 2702 case IB_CM_LAP_IDLE:
2703 break;
2704 case IB_CM_MRA_LAP_SENT:
9af57b7a
SH		 2705 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2706 counter[CM_LAP_COUNTER]);
a977049d
HR		 2707 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2708 goto unlock;
2709
2710 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2711 CM_MSG_RESPONSE_OTHER,
2712 cm_id_priv->service_timeout,
2713 cm_id_priv->private_data,
2714 cm_id_priv->private_data_len);
24be6e81 2715 spin_unlock_irq(&cm_id_priv->lock);
a977049d 2716
34816ad9 2717 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2718 cm_free_msg(msg);
2719 goto deref;
9af57b7a
SH		 2720 case IB_CM_LAP_RCVD:
2721 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2722 counter[CM_LAP_COUNTER]);
2723 goto unlock;
a977049d
HR		 2724 default:
2725 goto unlock;
2726 }
2727
2728 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2729 cm_id_priv->tid = lap_msg->hdr.tid;
e1444b5a
SH		 2730 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2731 work->mad_recv_wc->recv_buf.grh,
2732 &cm_id_priv->av);
2733 cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av);
a977049d
HR		 2734 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2735 if (!ret)
2736 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2737 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2738
2739 if (ret)
2740 cm_process_work(cm_id_priv, work);
2741 else
2742 cm_deref_id(cm_id_priv);
2743 return 0;
2744
24be6e81 2745unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2746deref: cm_deref_id(cm_id_priv);
2747 return -EINVAL;
2748}
2749
2750static void cm_format_apr(struct cm_apr_msg *apr_msg,
2751 struct cm_id_private *cm_id_priv,
2752 enum ib_cm_apr_status status,
2753 void *info,
2754 u8 info_length,
2755 const void *private_data,
2756 u8 private_data_len)
2757{
2758 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2759 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2760 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2761 apr_msg->ap_status = (u8) status;
2762
2763 if (info && info_length) {
2764 apr_msg->info_length = info_length;
2765 memcpy(apr_msg->info, info, info_length);
2766 }
2767
2768 if (private_data && private_data_len)
2769 memcpy(apr_msg->private_data, private_data, private_data_len);
2770}
2771
2772int ib_send_cm_apr(struct ib_cm_id *cm_id,
2773 enum ib_cm_apr_status status,
2774 void *info,
2775 u8 info_length,
2776 const void *private_data,
2777 u8 private_data_len)
2778{
2779 struct cm_id_private *cm_id_priv;
2780 struct ib_mad_send_buf *msg;
a977049d
HR		 2781 unsigned long flags;
2782 int ret;
2783
2784 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2785 (info && info_length > IB_CM_APR_INFO_LENGTH))
2786 return -EINVAL;
2787
2788 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2789 spin_lock_irqsave(&cm_id_priv->lock, flags);
2790 if (cm_id->state != IB_CM_ESTABLISHED ||
2791 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2792 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2793 ret = -EINVAL;
2794 goto out;
2795 }
2796
2797 ret = cm_alloc_msg(cm_id_priv, &msg);
2798 if (ret)
2799 goto out;
2800
2801 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2802 info, info_length, private_data, private_data_len);
34816ad9 2803 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2804 if (ret) {
2805 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2806 cm_free_msg(msg);
2807 return ret;
2808 }
2809
2810 cm_id->lap_state = IB_CM_LAP_IDLE;
2811out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2812 return ret;
2813}
2814EXPORT_SYMBOL(ib_send_cm_apr);
2815
2816static int cm_apr_handler(struct cm_work *work)
2817{
2818 struct cm_id_private *cm_id_priv;
2819 struct cm_apr_msg *apr_msg;
a977049d
HR		 2820 int ret;
2821
2822 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2823 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2824 apr_msg->local_comm_id);
2825 if (!cm_id_priv)
2826 return -EINVAL; /* Unmatched reply. */
2827
2828 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2829 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2830 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2831 work->cm_event.private_data = &apr_msg->private_data;
2832
24be6e81 2833 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2834 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2835 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2836 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
24be6e81 2837 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2838 goto out;
2839 }
2840 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
34816ad9 2841 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2842 cm_id_priv->msg = NULL;
2843
2844 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2845 if (!ret)
2846 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2847 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2848
2849 if (ret)
2850 cm_process_work(cm_id_priv, work);
2851 else
2852 cm_deref_id(cm_id_priv);
2853 return 0;
2854out:
2855 cm_deref_id(cm_id_priv);
2856 return -EINVAL;
2857}
2858
2859static int cm_timewait_handler(struct cm_work *work)
2860{
2861 struct cm_timewait_info *timewait_info;
2862 struct cm_id_private *cm_id_priv;
a977049d
HR		 2863 int ret;
2864
2865 timewait_info = (struct cm_timewait_info *)work;
8575329d
SH		 2866 spin_lock_irq(&cm.lock);
2867 list_del(&timewait_info->list);
2868 spin_unlock_irq(&cm.lock);
a977049d
HR		 2869
2870 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2871 timewait_info->work.remote_id);
2872 if (!cm_id_priv)
2873 return -EINVAL;
2874
8575329d 2875 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2876 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
2877 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
8575329d 2878 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2879 goto out;
2880 }
2881 cm_id_priv->id.state = IB_CM_IDLE;
2882 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2883 if (!ret)
2884 list_add_tail(&work->list, &cm_id_priv->work_list);
8575329d 2885 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2886
2887 if (ret)
2888 cm_process_work(cm_id_priv, work);
2889 else
2890 cm_deref_id(cm_id_priv);
2891 return 0;
2892out:
2893 cm_deref_id(cm_id_priv);
2894 return -EINVAL;
2895}
2896
2897static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
2898 struct cm_id_private *cm_id_priv,
2899 struct ib_cm_sidr_req_param *param)
2900{
2901 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
2902 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
2903 sidr_req_msg->request_id = cm_id_priv->id.local_id;
a88f4888 2904 sidr_req_msg->pkey = param->path->pkey;
a977049d
HR		 2905 sidr_req_msg->service_id = param->service_id;
2906
2907 if (param->private_data && param->private_data_len)
2908 memcpy(sidr_req_msg->private_data, param->private_data,
2909 param->private_data_len);
2910}
2911
2912int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
2913 struct ib_cm_sidr_req_param *param)
2914{
2915 struct cm_id_private *cm_id_priv;
2916 struct ib_mad_send_buf *msg;
a977049d
HR		 2917 unsigned long flags;
2918 int ret;
2919
2920 if (!param->path || (param->private_data &&
2921 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
2922 return -EINVAL;
2923
2924 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2925 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
2926 if (ret)
2927 goto out;
2928
2929 cm_id->service_id = param->service_id;
9c3da099 2930 cm_id->service_mask = ~cpu_to_be64(0);
a977049d
HR		 2931 cm_id_priv->timeout_ms = param->timeout_ms;
2932 cm_id_priv->max_cm_retries = param->max_cm_retries;
2933 ret = cm_alloc_msg(cm_id_priv, &msg);
2934 if (ret)
2935 goto out;
2936
2937 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
2938 param);
34816ad9 2939 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2940 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
2941
2942 spin_lock_irqsave(&cm_id_priv->lock, flags);
2943 if (cm_id->state == IB_CM_IDLE)
34816ad9 2944 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2945 else
2946 ret = -EINVAL;
2947
2948 if (ret) {
2949 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2950 cm_free_msg(msg);
2951 goto out;
2952 }
2953 cm_id->state = IB_CM_SIDR_REQ_SENT;
2954 cm_id_priv->msg = msg;
2955 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2956out:
2957 return ret;
2958}
2959EXPORT_SYMBOL(ib_send_cm_sidr_req);
2960
2961static void cm_format_sidr_req_event(struct cm_work *work,
2962 struct ib_cm_id *listen_id)
2963{
2964 struct cm_sidr_req_msg *sidr_req_msg;
2965 struct ib_cm_sidr_req_event_param *param;
2966
2967 sidr_req_msg = (struct cm_sidr_req_msg *)
2968 work->mad_recv_wc->recv_buf.mad;
2969 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 2970 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 2971 param->listen_id = listen_id;
a977049d
HR		 2972 param->port = work->port->port_num;
2973 work->cm_event.private_data = &sidr_req_msg->private_data;
2974}
2975
2976static int cm_sidr_req_handler(struct cm_work *work)
2977{
2978 struct ib_cm_id *cm_id;
2979 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
2980 struct cm_sidr_req_msg *sidr_req_msg;
2981 struct ib_wc *wc;
a977049d 2982
d4c4196f 2983 cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
a977049d
HR		 2984 if (IS_ERR(cm_id))
2985 return PTR_ERR(cm_id);
2986 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2987
2988 /* Record SGID/SLID and request ID for lookup. */
2989 sidr_req_msg = (struct cm_sidr_req_msg *)
2990 work->mad_recv_wc->recv_buf.mad;
2991 wc = work->mad_recv_wc->wc;
97f52eb4 2992 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 2993 cm_id_priv->av.dgid.global.interface_id = 0;
2994 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 2995 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 2996 &cm_id_priv->av);
2997 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
a977049d
HR		 2998 cm_id_priv->tid = sidr_req_msg->hdr.tid;
2999 atomic_inc(&cm_id_priv->work_count);
3000
24be6e81 3001 spin_lock_irq(&cm.lock);
a977049d
HR		 3002 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
3003 if (cur_cm_id_priv) {
24be6e81 3004 spin_unlock_irq(&cm.lock);
9af57b7a
SH		 3005 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
3006 counter[CM_SIDR_REQ_COUNTER]);
a977049d
HR		 3007 goto out; /* Duplicate message. */
3008 }
29c2731c 3009 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
07d357d0 3010 cur_cm_id_priv = cm_find_listen(cm_id->device,
6e61d04f
SH		 3011 sidr_req_msg->service_id,
3012 sidr_req_msg->private_data);
a977049d 3013 if (!cur_cm_id_priv) {
24be6e81 3014 spin_unlock_irq(&cm.lock);
6164c8cd 3015 cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED);
a977049d
HR		 3016 goto out; /* No match. */
3017 }
3018 atomic_inc(&cur_cm_id_priv->refcount);
29963437 3019 atomic_inc(&cm_id_priv->refcount);
24be6e81 3020 spin_unlock_irq(&cm.lock);
a977049d
HR		 3021
3022 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
3023 cm_id_priv->id.context = cur_cm_id_priv->id.context;
3024 cm_id_priv->id.service_id = sidr_req_msg->service_id;
9c3da099 3025 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
a977049d
HR		 3026
3027 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
3028 cm_process_work(cm_id_priv, work);
3029 cm_deref_id(cur_cm_id_priv);
3030 return 0;
3031out:
3032 ib_destroy_cm_id(&cm_id_priv->id);
3033 return -EINVAL;
3034}
3035
3036static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
3037 struct cm_id_private *cm_id_priv,
3038 struct ib_cm_sidr_rep_param *param)
3039{
3040 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
3041 cm_id_priv->tid);
3042 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
3043 sidr_rep_msg->status = param->status;
3044 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
3045 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
3046 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
3047
3048 if (param->info && param->info_length)
3049 memcpy(sidr_rep_msg->info, param->info, param->info_length);
3050
3051 if (param->private_data && param->private_data_len)
3052 memcpy(sidr_rep_msg->private_data, param->private_data,
3053 param->private_data_len);
3054}
3055
3056int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
3057 struct ib_cm_sidr_rep_param *param)
3058{
3059 struct cm_id_private *cm_id_priv;
3060 struct ib_mad_send_buf *msg;
a977049d
HR		 3061 unsigned long flags;
3062 int ret;
3063
3064 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
3065 (param->private_data &&
3066 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
3067 return -EINVAL;
3068
3069 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3070 spin_lock_irqsave(&cm_id_priv->lock, flags);
3071 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
3072 ret = -EINVAL;
3073 goto error;
3074 }
3075
3076 ret = cm_alloc_msg(cm_id_priv, &msg);
3077 if (ret)
3078 goto error;
3079
3080 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
3081 param);
34816ad9 3082 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 3083 if (ret) {
3084 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3085 cm_free_msg(msg);
3086 return ret;
3087 }
3088 cm_id->state = IB_CM_IDLE;
3089 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3090
3091 spin_lock_irqsave(&cm.lock, flags);
3092 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
3093 spin_unlock_irqrestore(&cm.lock, flags);
3094 return 0;
3095
3096error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3097 return ret;
3098}
3099EXPORT_SYMBOL(ib_send_cm_sidr_rep);
3100
3101static void cm_format_sidr_rep_event(struct cm_work *work)
3102{
3103 struct cm_sidr_rep_msg *sidr_rep_msg;
3104 struct ib_cm_sidr_rep_event_param *param;
3105
3106 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3107 work->mad_recv_wc->recv_buf.mad;
3108 param = &work->cm_event.param.sidr_rep_rcvd;
3109 param->status = sidr_rep_msg->status;
3110 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
3111 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
3112 param->info = &sidr_rep_msg->info;
3113 param->info_len = sidr_rep_msg->info_length;
3114 work->cm_event.private_data = &sidr_rep_msg->private_data;
3115}
3116
3117static int cm_sidr_rep_handler(struct cm_work *work)
3118{
3119 struct cm_sidr_rep_msg *sidr_rep_msg;
3120 struct cm_id_private *cm_id_priv;
a977049d
HR		 3121
3122 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3123 work->mad_recv_wc->recv_buf.mad;
3124 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
3125 if (!cm_id_priv)
3126 return -EINVAL; /* Unmatched reply. */
3127
24be6e81 3128 spin_lock_irq(&cm_id_priv->lock);
a977049d 3129 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
24be6e81 3130 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3131 goto out;
3132 }
3133 cm_id_priv->id.state = IB_CM_IDLE;
34816ad9 3134 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
24be6e81 3135 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3136
3137 cm_format_sidr_rep_event(work);
3138 cm_process_work(cm_id_priv, work);
3139 return 0;
3140out:
3141 cm_deref_id(cm_id_priv);
3142 return -EINVAL;
3143}
3144
3145static void cm_process_send_error(struct ib_mad_send_buf *msg,
3146 enum ib_wc_status wc_status)
3147{
3148 struct cm_id_private *cm_id_priv;
3149 struct ib_cm_event cm_event;
3150 enum ib_cm_state state;
a977049d
HR		 3151 int ret;
3152
3153 memset(&cm_event, 0, sizeof cm_event);
3154 cm_id_priv = msg->context[0];
3155
3156 /* Discard old sends or ones without a response. */
24be6e81 3157 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 3158 state = (enum ib_cm_state) (unsigned long) msg->context[1];
3159 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
3160 goto discard;
3161
3162 switch (state) {
3163 case IB_CM_REQ_SENT:
3164 case IB_CM_MRA_REQ_RCVD:
3165 cm_reset_to_idle(cm_id_priv);
3166 cm_event.event = IB_CM_REQ_ERROR;
3167 break;
3168 case IB_CM_REP_SENT:
3169 case IB_CM_MRA_REP_RCVD:
3170 cm_reset_to_idle(cm_id_priv);
3171 cm_event.event = IB_CM_REP_ERROR;
3172 break;
3173 case IB_CM_DREQ_SENT:
3174 cm_enter_timewait(cm_id_priv);
3175 cm_event.event = IB_CM_DREQ_ERROR;
3176 break;
3177 case IB_CM_SIDR_REQ_SENT:
3178 cm_id_priv->id.state = IB_CM_IDLE;
3179 cm_event.event = IB_CM_SIDR_REQ_ERROR;
3180 break;
3181 default:
3182 goto discard;
3183 }
24be6e81 3184 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3185 cm_event.param.send_status = wc_status;
3186
3187 /* No other events can occur on the cm_id at this point. */
3188 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
3189 cm_free_msg(msg);
3190 if (ret)
3191 ib_destroy_cm_id(&cm_id_priv->id);
3192 return;
3193discard:
24be6e81 3194 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3195 cm_free_msg(msg);
3196}
3197
3198static void cm_send_handler(struct ib_mad_agent *mad_agent,
3199 struct ib_mad_send_wc *mad_send_wc)
3200{
34816ad9 3201 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
9af57b7a
SH		 3202 struct cm_port *port;
3203 u16 attr_index;
3204
3205 port = mad_agent->context;
3206 attr_index = be16_to_cpu(((struct ib_mad_hdr *)
3207 msg->mad)->attr_id) - CM_ATTR_ID_OFFSET;
3208
3209 /*
3210 * If the send was in response to a received message (context[0] is not
3211 * set to a cm_id), and is not a REJ, then it is a send that was
3212 * manually retried.
3213 */
3214 if (!msg->context[0] && (attr_index != CM_REJ_COUNTER))
3215 msg->retries = 1;
3216
3217 atomic_long_add(1 + msg->retries,
3218 &port->counter_group[CM_XMIT].counter[attr_index]);
3219 if (msg->retries)
3220 atomic_long_add(msg->retries,
3221 &port->counter_group[CM_XMIT_RETRIES].
3222 counter[attr_index]);
a977049d
HR		 3223
3224 switch (mad_send_wc->status) {
3225 case IB_WC_SUCCESS:
3226 case IB_WC_WR_FLUSH_ERR:
3227 cm_free_msg(msg);
3228 break;
3229 default:
3230 if (msg->context[0] && msg->context[1])
3231 cm_process_send_error(msg, mad_send_wc->status);
3232 else
3233 cm_free_msg(msg);
3234 break;
3235 }
3236}
3237
c4028958 3238static void cm_work_handler(struct work_struct *_work)
a977049d 3239{
c4028958 3240 struct cm_work *work = container_of(_work, struct cm_work, work.work);
a977049d
HR		 3241 int ret;
3242
3243 switch (work->cm_event.event) {
3244 case IB_CM_REQ_RECEIVED:
3245 ret = cm_req_handler(work);
3246 break;
3247 case IB_CM_MRA_RECEIVED:
3248 ret = cm_mra_handler(work);
3249 break;
3250 case IB_CM_REJ_RECEIVED:
3251 ret = cm_rej_handler(work);
3252 break;
3253 case IB_CM_REP_RECEIVED:
3254 ret = cm_rep_handler(work);
3255 break;
3256 case IB_CM_RTU_RECEIVED:
3257 ret = cm_rtu_handler(work);
3258 break;
3259 case IB_CM_USER_ESTABLISHED:
3260 ret = cm_establish_handler(work);
3261 break;
3262 case IB_CM_DREQ_RECEIVED:
3263 ret = cm_dreq_handler(work);
3264 break;
3265 case IB_CM_DREP_RECEIVED:
3266 ret = cm_drep_handler(work);
3267 break;
3268 case IB_CM_SIDR_REQ_RECEIVED:
3269 ret = cm_sidr_req_handler(work);
3270 break;
3271 case IB_CM_SIDR_REP_RECEIVED:
3272 ret = cm_sidr_rep_handler(work);
3273 break;
3274 case IB_CM_LAP_RECEIVED:
3275 ret = cm_lap_handler(work);
3276 break;
3277 case IB_CM_APR_RECEIVED:
3278 ret = cm_apr_handler(work);
3279 break;
3280 case IB_CM_TIMEWAIT_EXIT:
3281 ret = cm_timewait_handler(work);
3282 break;
3283 default:
3284 ret = -EINVAL;
3285 break;
3286 }
3287 if (ret)
3288 cm_free_work(work);
3289}
3290
e1444b5a 3291static int cm_establish(struct ib_cm_id *cm_id)
a977049d
HR		 3292{
3293 struct cm_id_private *cm_id_priv;
3294 struct cm_work *work;
3295 unsigned long flags;
3296 int ret = 0;
3297
3298 work = kmalloc(sizeof *work, GFP_ATOMIC);
3299 if (!work)
3300 return -ENOMEM;
3301
3302 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3303 spin_lock_irqsave(&cm_id_priv->lock, flags);
3304 switch (cm_id->state)
3305 {
3306 case IB_CM_REP_SENT:
3307 case IB_CM_MRA_REP_RCVD:
3308 cm_id->state = IB_CM_ESTABLISHED;
3309 break;
3310 case IB_CM_ESTABLISHED:
3311 ret = -EISCONN;
3312 break;
3313 default:
3314 ret = -EINVAL;
3315 break;
3316 }
3317 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3318
3319 if (ret) {
3320 kfree(work);
3321 goto out;
3322 }
3323
3324 /*
3325 * The CM worker thread may try to destroy the cm_id before it
3326 * can execute this work item. To prevent potential deadlock,
3327 * we need to find the cm_id once we're in the context of the
3328 * worker thread, rather than holding a reference on it.
3329 */
c4028958 3330 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 3331 work->local_id = cm_id->local_id;
3332 work->remote_id = cm_id->remote_id;
3333 work->mad_recv_wc = NULL;
3334 work->cm_event.event = IB_CM_USER_ESTABLISHED;
c4028958 3335 queue_delayed_work(cm.wq, &work->work, 0);
a977049d
HR		 3336out:
3337 return ret;
3338}
e1444b5a
SH		 3339
3340static int cm_migrate(struct ib_cm_id *cm_id)
3341{
3342 struct cm_id_private *cm_id_priv;
3343 unsigned long flags;
3344 int ret = 0;
3345
3346 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3347 spin_lock_irqsave(&cm_id_priv->lock, flags);
3348 if (cm_id->state == IB_CM_ESTABLISHED &&
3349 (cm_id->lap_state == IB_CM_LAP_UNINIT ||
3350 cm_id->lap_state == IB_CM_LAP_IDLE)) {
3351 cm_id->lap_state = IB_CM_LAP_IDLE;
3352 cm_id_priv->av = cm_id_priv->alt_av;
3353 } else
3354 ret = -EINVAL;
3355 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3356
3357 return ret;
3358}
3359
3360int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
3361{
3362 int ret;
3363
3364 switch (event) {
3365 case IB_EVENT_COMM_EST:
3366 ret = cm_establish(cm_id);
3367 break;
3368 case IB_EVENT_PATH_MIG:
3369 ret = cm_migrate(cm_id);
3370 break;
3371 default:
3372 ret = -EINVAL;
3373 }
3374 return ret;
3375}
3376EXPORT_SYMBOL(ib_cm_notify);
a977049d
HR		 3377
3378static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3379 struct ib_mad_recv_wc *mad_recv_wc)
3380{
9af57b7a 3381 struct cm_port *port = mad_agent->context;
a977049d
HR		 3382 struct cm_work *work;
3383 enum ib_cm_event_type event;
9af57b7a 3384 u16 attr_id;
a977049d
HR		 3385 int paths = 0;
3386
3387 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3388 case CM_REQ_ATTR_ID:
3389 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3390 alt_local_lid != 0);
3391 event = IB_CM_REQ_RECEIVED;
3392 break;
3393 case CM_MRA_ATTR_ID:
3394 event = IB_CM_MRA_RECEIVED;
3395 break;
3396 case CM_REJ_ATTR_ID:
3397 event = IB_CM_REJ_RECEIVED;
3398 break;
3399 case CM_REP_ATTR_ID:
3400 event = IB_CM_REP_RECEIVED;
3401 break;
3402 case CM_RTU_ATTR_ID:
3403 event = IB_CM_RTU_RECEIVED;
3404 break;
3405 case CM_DREQ_ATTR_ID:
3406 event = IB_CM_DREQ_RECEIVED;
3407 break;
3408 case CM_DREP_ATTR_ID:
3409 event = IB_CM_DREP_RECEIVED;
3410 break;
3411 case CM_SIDR_REQ_ATTR_ID:
3412 event = IB_CM_SIDR_REQ_RECEIVED;
3413 break;
3414 case CM_SIDR_REP_ATTR_ID:
3415 event = IB_CM_SIDR_REP_RECEIVED;
3416 break;
3417 case CM_LAP_ATTR_ID:
3418 paths = 1;
3419 event = IB_CM_LAP_RECEIVED;
3420 break;
3421 case CM_APR_ATTR_ID:
3422 event = IB_CM_APR_RECEIVED;
3423 break;
3424 default:
3425 ib_free_recv_mad(mad_recv_wc);
3426 return;
3427 }
3428
9af57b7a
SH		 3429 attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id);
3430 atomic_long_inc(&port->counter_group[CM_RECV].
3431 counter[attr_id - CM_ATTR_ID_OFFSET]);
3432
a977049d
HR		 3433 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3434 GFP_KERNEL);
3435 if (!work) {
3436 ib_free_recv_mad(mad_recv_wc);
3437 return;
3438 }
3439
c4028958 3440 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 3441 work->cm_event.event = event;
3442 work->mad_recv_wc = mad_recv_wc;
9af57b7a 3443 work->port = port;
c4028958 3444 queue_delayed_work(cm.wq, &work->work, 0);
a977049d
HR		 3445}
3446
3447static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3448 struct ib_qp_attr *qp_attr,
3449 int *qp_attr_mask)
3450{
3451 unsigned long flags;
3452 int ret;
3453
3454 spin_lock_irqsave(&cm_id_priv->lock, flags);
3455 switch (cm_id_priv->id.state) {
3456 case IB_CM_REQ_SENT:
3457 case IB_CM_MRA_REQ_RCVD:
3458 case IB_CM_REQ_RCVD:
3459 case IB_CM_MRA_REQ_SENT:
3460 case IB_CM_REP_RCVD:
3461 case IB_CM_MRA_REP_SENT:
3462 case IB_CM_REP_SENT:
3463 case IB_CM_MRA_REP_RCVD:
3464 case IB_CM_ESTABLISHED:
3465 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3466 IB_QP_PKEY_INDEX | IB_QP_PORT;
e31353ea 3467 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
a977049d 3468 if (cm_id_priv->responder_resources)
c1f250c0
SH		 3469 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3470 IB_ACCESS_REMOTE_ATOMIC;
a977049d
HR		 3471 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3472 qp_attr->port_num = cm_id_priv->av.port->port_num;
3473 ret = 0;
3474 break;
3475 default:
3476 ret = -EINVAL;
3477 break;
3478 }
3479 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3480 return ret;
3481}
3482
3483static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3484 struct ib_qp_attr *qp_attr,
3485 int *qp_attr_mask)
3486{
3487 unsigned long flags;
3488 int ret;
3489
3490 spin_lock_irqsave(&cm_id_priv->lock, flags);
3491 switch (cm_id_priv->id.state) {
3492 case IB_CM_REQ_RCVD:
3493 case IB_CM_MRA_REQ_SENT:
3494 case IB_CM_REP_RCVD:
3495 case IB_CM_MRA_REP_SENT:
3496 case IB_CM_REP_SENT:
3497 case IB_CM_MRA_REP_RCVD:
3498 case IB_CM_ESTABLISHED:
3499 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 3500 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d
HR		 3501 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
3502 qp_attr->path_mtu = cm_id_priv->path_mtu;
3503 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3504 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
d26a360b
SH		 3505 if (cm_id_priv->qp_type == IB_QPT_RC ||
3506 cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
ae7971a7
SH		 3507 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3508 IB_QP_MIN_RNR_TIMER;
3509 qp_attr->max_dest_rd_atomic =
3510 cm_id_priv->responder_resources;
3511 qp_attr->min_rnr_timer = 0;
3512 }
a977049d
HR		 3513 if (cm_id_priv->alt_av.ah_attr.dlid) {
3514 *qp_attr_mask |= IB_QP_ALT_PATH;
0d8fdfd7 3515 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
e1444b5a 3516 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
1d846126 3517 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
a977049d
HR		 3518 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3519 }
3520 ret = 0;
3521 break;
3522 default:
3523 ret = -EINVAL;
3524 break;
3525 }
3526 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3527 return ret;
3528}
3529
3530static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3531 struct ib_qp_attr *qp_attr,
3532 int *qp_attr_mask)
3533{
3534 unsigned long flags;
3535 int ret;
3536
3537 spin_lock_irqsave(&cm_id_priv->lock, flags);
3538 switch (cm_id_priv->id.state) {
0fe313b0
SH		 3539 /* Allow transition to RTS before sending REP */
3540 case IB_CM_REQ_RCVD:
3541 case IB_CM_MRA_REQ_SENT:
3542
a977049d
HR		 3543 case IB_CM_REP_RCVD:
3544 case IB_CM_MRA_REP_SENT:
3545 case IB_CM_REP_SENT:
3546 case IB_CM_MRA_REP_RCVD:
3547 case IB_CM_ESTABLISHED:
e1444b5a
SH		 3548 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
3549 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
3550 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
d26a360b
SH		 3551 switch (cm_id_priv->qp_type) {
3552 case IB_QPT_RC:
3553 case IB_QPT_XRC_INI:
3554 *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY |
e1444b5a 3555 IB_QP_MAX_QP_RD_ATOMIC;
e1444b5a
SH		 3556 qp_attr->retry_cnt = cm_id_priv->retry_count;
3557 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
d26a360b
SH		 3558 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3559 /* fall through */
3560 case IB_QPT_XRC_TGT:
3561 *qp_attr_mask |= IB_QP_TIMEOUT;
3562 qp_attr->timeout = cm_id_priv->av.timeout;
3563 break;
3564 default:
3565 break;
e1444b5a
SH		 3566 }
3567 if (cm_id_priv->alt_av.ah_attr.dlid) {
3568 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3569 qp_attr->path_mig_state = IB_MIG_REARM;
3570 }
3571 } else {
3572 *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
3573 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3574 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
1d846126 3575 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
e1444b5a 3576 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
a977049d
HR		 3577 qp_attr->path_mig_state = IB_MIG_REARM;
3578 }
3579 ret = 0;
3580 break;
3581 default:
3582 ret = -EINVAL;
3583 break;
3584 }
3585 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3586 return ret;
3587}
3588
3589int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3590 struct ib_qp_attr *qp_attr,
3591 int *qp_attr_mask)
3592{
3593 struct cm_id_private *cm_id_priv;
3594 int ret;
3595
3596 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3597 switch (qp_attr->qp_state) {
3598 case IB_QPS_INIT:
3599 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3600 break;
3601 case IB_QPS_RTR:
3602 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3603 break;
3604 case IB_QPS_RTS:
3605 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3606 break;
3607 default:
3608 ret = -EINVAL;
3609 break;
3610 }
3611 return ret;
3612}
3613EXPORT_SYMBOL(ib_cm_init_qp_attr);
3614
454a01e7 3615static void cm_get_ack_delay(struct cm_device *cm_dev)
1d846126
SH		 3616{
3617 struct ib_device_attr attr;
3618
d4c4196f 3619 if (ib_query_device(cm_dev->ib_device, &attr))
1d846126
SH		 3620 cm_dev->ack_delay = 0; /* acks will rely on packet life time */
3621 else
3622 cm_dev->ack_delay = attr.local_ca_ack_delay;
3623}
3624
9af57b7a
SH		 3625static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr,
3626 char *buf)
3627{
3628 struct cm_counter_group *group;
3629 struct cm_counter_attribute *cm_attr;
3630
3631 group = container_of(obj, struct cm_counter_group, obj);
3632 cm_attr = container_of(attr, struct cm_counter_attribute, attr);
3633
3634 return sprintf(buf, "%ld\n",
3635 atomic_long_read(&group->counter[cm_attr->index]));
3636}
3637
52cf25d0 3638static const struct sysfs_ops cm_counter_ops = {
9af57b7a
SH		 3639 .show = cm_show_counter
3640};
3641
3642static struct kobj_type cm_counter_obj_type = {
3643 .sysfs_ops = &cm_counter_ops,
3644 .default_attrs = cm_counter_default_attrs
3645};
3646
3647static void cm_release_port_obj(struct kobject *obj)
3648{
3649 struct cm_port *cm_port;
3650
9af57b7a
SH		 3651 cm_port = container_of(obj, struct cm_port, port_obj);
3652 kfree(cm_port);
3653}
3654
3655static struct kobj_type cm_port_obj_type = {
3656 .release = cm_release_port_obj
3657};
3658
c3af0980
RD		 3659static char *cm_devnode(struct device *dev, mode_t *mode)
3660{
b2bc4782
GR		 3661 if (mode)
3662 *mode = 0666;
c3af0980
RD		 3663 return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
3664}
3665
9af57b7a 3666struct class cm_class = {
c3af0980 3667 .owner = THIS_MODULE,
9af57b7a 3668 .name = "infiniband_cm",
c3af0980 3669 .devnode = cm_devnode,
9af57b7a
SH		 3670};
3671EXPORT_SYMBOL(cm_class);
3672
9af57b7a
SH		 3673static int cm_create_port_fs(struct cm_port *port)
3674{
3675 int i, ret;
3676
3677 ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type,
110cf374 3678 &port->cm_dev->device->kobj,
9af57b7a
SH		 3679 "%d", port->port_num);
3680 if (ret) {
3681 kfree(port);
3682 return ret;
3683 }
3684
3685 for (i = 0; i < CM_COUNTER_GROUPS; i++) {
3686 ret = kobject_init_and_add(&port->counter_group[i].obj,
3687 &cm_counter_obj_type,
7c7a9bcc 3688 &port->port_obj,
9af57b7a
SH		 3689 "%s", counter_group_names[i]);
3690 if (ret)
3691 goto error;
3692 }
3693
3694 return 0;
3695
3696error:
3697 while (i--)
7c7a9bcc
RD		 3698 kobject_put(&port->counter_group[i].obj);
3699 kobject_put(&port->port_obj);
9af57b7a
SH		 3700 return ret;
3701
3702}
3703
3704static void cm_remove_port_fs(struct cm_port *port)
3705{
3706 int i;
3707
3708 for (i = 0; i < CM_COUNTER_GROUPS; i++)
7c7a9bcc 3709 kobject_put(&port->counter_group[i].obj);
9af57b7a 3710
7c7a9bcc 3711 kobject_put(&port->port_obj);
9af57b7a
SH		 3712}
3713
d4c4196f 3714static void cm_add_one(struct ib_device *ib_device)
a977049d
HR		 3715{
3716 struct cm_device *cm_dev;
3717 struct cm_port *port;
3718 struct ib_mad_reg_req reg_req = {
3719 .mgmt_class = IB_MGMT_CLASS_CM,
3720 .mgmt_class_version = IB_CM_CLASS_VERSION
3721 };
3722 struct ib_port_modify port_modify = {
3723 .set_port_cap_mask = IB_PORT_CM_SUP
3724 };
3725 unsigned long flags;
3726 int ret;
3727 u8 i;
3728
d4c4196f 3729 if (rdma_node_get_transport(ib_device->node_type) != RDMA_TRANSPORT_IB)
07ebafba
TT		 3730 return;
3731
9af57b7a 3732 cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) *
d4c4196f 3733 ib_device->phys_port_cnt, GFP_KERNEL);
a977049d
HR		 3734 if (!cm_dev)
3735 return;
3736
d4c4196f 3737 cm_dev->ib_device = ib_device;
1d846126 3738 cm_get_ack_delay(cm_dev);
a977049d 3739
91bd418f
GKH		 3740 cm_dev->device = device_create(&cm_class, &ib_device->dev,
3741 MKDEV(0, 0), NULL,
3742 "%s", ib_device->name);
3e340c05 3743 if (IS_ERR(cm_dev->device)) {
9af57b7a
SH		 3744 kfree(cm_dev);
3745 return;
3746 }
3747
a977049d 3748 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
d4c4196f 3749 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
9af57b7a
SH		 3750 port = kzalloc(sizeof *port, GFP_KERNEL);
3751 if (!port)
3752 goto error1;
3753
3754 cm_dev->port[i-1] = port;
a977049d
HR		 3755 port->cm_dev = cm_dev;
3756 port->port_num = i;
9af57b7a
SH		 3757
3758 ret = cm_create_port_fs(port);
3759 if (ret)
3760 goto error1;
3761
d4c4196f 3762 port->mad_agent = ib_register_mad_agent(ib_device, i,
a977049d
HR		 3763 IB_QPT_GSI,
3764 &reg_req,
3765 0,
3766 cm_send_handler,
3767 cm_recv_handler,
3768 port);
3769 if (IS_ERR(port->mad_agent))
9af57b7a 3770 goto error2;
a977049d 3771
d4c4196f 3772 ret = ib_modify_port(ib_device, i, 0, &port_modify);
a977049d 3773 if (ret)
9af57b7a 3774 goto error3;
a977049d 3775 }
d4c4196f 3776 ib_set_client_data(ib_device, &cm_client, cm_dev);
a977049d
HR		 3777
3778 write_lock_irqsave(&cm.device_lock, flags);
3779 list_add_tail(&cm_dev->list, &cm.device_list);
3780 write_unlock_irqrestore(&cm.device_lock, flags);
3781 return;
3782
9af57b7a 3783error3:
cf311cd4 3784 ib_unregister_mad_agent(port->mad_agent);
9af57b7a
SH		 3785error2:
3786 cm_remove_port_fs(port);
cf311cd4 3787error1:
a977049d
HR		 3788 port_modify.set_port_cap_mask = 0;
3789 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3790 while (--i) {
9af57b7a 3791 port = cm_dev->port[i-1];
d4c4196f 3792 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
a977049d 3793 ib_unregister_mad_agent(port->mad_agent);
9af57b7a 3794 cm_remove_port_fs(port);
a977049d 3795 }
110cf374 3796 device_unregister(cm_dev->device);
a7e80ce2 3797 kfree(cm_dev);
a977049d
HR		 3798}
3799
d4c4196f 3800static void cm_remove_one(struct ib_device *ib_device)
a977049d
HR		 3801{
3802 struct cm_device *cm_dev;
3803 struct cm_port *port;
3804 struct ib_port_modify port_modify = {
3805 .clr_port_cap_mask = IB_PORT_CM_SUP
3806 };
3807 unsigned long flags;
3808 int i;
3809
d4c4196f 3810 cm_dev = ib_get_client_data(ib_device, &cm_client);
a977049d
HR		 3811 if (!cm_dev)
3812 return;
3813
3814 write_lock_irqsave(&cm.device_lock, flags);
3815 list_del(&cm_dev->list);
3816 write_unlock_irqrestore(&cm.device_lock, flags);
3817
d4c4196f 3818 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
9af57b7a 3819 port = cm_dev->port[i-1];
d4c4196f 3820 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
a977049d 3821 ib_unregister_mad_agent(port->mad_agent);
84ba284c 3822 flush_workqueue(cm.wq);
9af57b7a 3823 cm_remove_port_fs(port);
a977049d 3824 }
110cf374 3825 device_unregister(cm_dev->device);
a7e80ce2 3826 kfree(cm_dev);
a977049d
HR		 3827}
3828
3829static int __init ib_cm_init(void)
3830{
3831 int ret;
3832
3833 memset(&cm, 0, sizeof cm);
3834 INIT_LIST_HEAD(&cm.device_list);
3835 rwlock_init(&cm.device_lock);
3836 spin_lock_init(&cm.lock);
3837 cm.listen_service_table = RB_ROOT;
9c3da099 3838 cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
a977049d
HR		 3839 cm.remote_id_table = RB_ROOT;
3840 cm.remote_qp_table = RB_ROOT;
3841 cm.remote_sidr_table = RB_ROOT;
3842 idr_init(&cm.local_id_table);
f06d2653 3843 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
a977049d 3844 idr_pre_get(&cm.local_id_table, GFP_KERNEL);
8575329d 3845 INIT_LIST_HEAD(&cm.timewait_list);
a977049d 3846
9af57b7a
SH		 3847 ret = class_register(&cm_class);
3848 if (ret)
a977049d
HR		 3849 return -ENOMEM;
3850
9af57b7a
SH		 3851 cm.wq = create_workqueue("ib_cm");
3852 if (!cm.wq) {
3853 ret = -ENOMEM;
3854 goto error1;
3855 }
3856
a977049d
HR		 3857 ret = ib_register_client(&cm_client);
3858 if (ret)
9af57b7a 3859 goto error2;
a977049d
HR		 3860
3861 return 0;
9af57b7a 3862error2:
a977049d 3863 destroy_workqueue(cm.wq);
9af57b7a
SH		 3864error1:
3865 class_unregister(&cm_class);
a977049d
HR		 3866 return ret;
3867}
3868
3869static void __exit ib_cm_cleanup(void)
3870{
8575329d
SH		 3871 struct cm_timewait_info *timewait_info, *tmp;
3872
3873 spin_lock_irq(&cm.lock);
3874 list_for_each_entry(timewait_info, &cm.timewait_list, list)
3875 cancel_delayed_work(&timewait_info->work.work);
3876 spin_unlock_irq(&cm.lock);
3877
84ba284c 3878 ib_unregister_client(&cm_client);
a977049d 3879 destroy_workqueue(cm.wq);
8575329d
SH		 3880
3881 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
3882 list_del(&timewait_info->list);
3883 kfree(timewait_info);
3884 }
3885
9af57b7a 3886 class_unregister(&cm_class);
5d7edb3c 3887 idr_destroy(&cm.local_id_table);
a977049d
HR		 3888}
3889
3890module_init(ib_cm_init);
3891module_exit(ib_cm_cleanup);
3892
Linux kernel - Deliverables
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