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IB/cm: Share listening CM IDs
[deliverable/linux.git] / drivers / infiniband / core / cm.c
CommitLineData
a977049d 1/*
9af57b7a 2 * Copyright (c) 2004-2007 Intel Corporation. All rights reserved.
a977049d
HR		 3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
a977049d 34 */
1b52fa98
SH		 35
36#include <linux/completion.h>
a977049d 37#include <linux/dma-mapping.h>
9af57b7a 38#include <linux/device.h>
e4dd23d7 39#include <linux/module.h>
a977049d
HR		 40#include <linux/err.h>
41#include <linux/idr.h>
42#include <linux/interrupt.h>
f06d2653 43#include <linux/random.h>
a977049d
HR		 44#include <linux/rbtree.h>
45#include <linux/spinlock.h>
5a0e3ad6 46#include <linux/slab.h>
9af57b7a 47#include <linux/sysfs.h>
a977049d 48#include <linux/workqueue.h>
110cf374 49#include <linux/kdev_t.h>
dd5f03be 50#include <linux/etherdevice.h>
a977049d 51
a4d61e84
RD		 52#include <rdma/ib_cache.h>
53#include <rdma/ib_cm.h>
a977049d
HR		 54#include "cm_msgs.h"
55
56MODULE_AUTHOR("Sean Hefty");
57MODULE_DESCRIPTION("InfiniBand CM");
58MODULE_LICENSE("Dual BSD/GPL");
59
60static void cm_add_one(struct ib_device *device);
7c1eb45a 61static void cm_remove_one(struct ib_device *device, void *client_data);
a977049d
HR		 62
63static struct ib_client cm_client = {
64 .name = "cm",
65 .add = cm_add_one,
66 .remove = cm_remove_one
67};
68
69static struct ib_cm {
70 spinlock_t lock;
71 struct list_head device_list;
72 rwlock_t device_lock;
73 struct rb_root listen_service_table;
74 u64 listen_service_id;
75 /* struct rb_root peer_service_table; todo: fix peer to peer */
76 struct rb_root remote_qp_table;
77 struct rb_root remote_id_table;
78 struct rb_root remote_sidr_table;
79 struct idr local_id_table;
f06d2653 80 __be32 random_id_operand;
8575329d 81 struct list_head timewait_list;
a977049d
HR		 82 struct workqueue_struct *wq;
83} cm;
84
9af57b7a
SH		 85/* Counter indexes ordered by attribute ID */
86enum {
87 CM_REQ_COUNTER,
88 CM_MRA_COUNTER,
89 CM_REJ_COUNTER,
90 CM_REP_COUNTER,
91 CM_RTU_COUNTER,
92 CM_DREQ_COUNTER,
93 CM_DREP_COUNTER,
94 CM_SIDR_REQ_COUNTER,
95 CM_SIDR_REP_COUNTER,
96 CM_LAP_COUNTER,
97 CM_APR_COUNTER,
98 CM_ATTR_COUNT,
99 CM_ATTR_ID_OFFSET = 0x0010,
100};
101
102enum {
103 CM_XMIT,
104 CM_XMIT_RETRIES,
105 CM_RECV,
106 CM_RECV_DUPLICATES,
107 CM_COUNTER_GROUPS
108};
109
110static char const counter_group_names[CM_COUNTER_GROUPS]
111 [sizeof("cm_rx_duplicates")] = {
112 "cm_tx_msgs", "cm_tx_retries",
113 "cm_rx_msgs", "cm_rx_duplicates"
114};
115
116struct cm_counter_group {
117 struct kobject obj;
118 atomic_long_t counter[CM_ATTR_COUNT];
119};
120
121struct cm_counter_attribute {
122 struct attribute attr;
123 int index;
124};
125
126#define CM_COUNTER_ATTR(_name, _index) \
127struct cm_counter_attribute cm_##_name##_counter_attr = { \
01e8ef11 128 .attr = { .name = __stringify(_name), .mode = 0444 }, \
9af57b7a
SH		 129 .index = _index \
130}
131
132static CM_COUNTER_ATTR(req, CM_REQ_COUNTER);
133static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER);
134static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER);
135static CM_COUNTER_ATTR(rep, CM_REP_COUNTER);
136static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER);
137static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER);
138static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER);
139static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER);
140static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER);
141static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER);
142static CM_COUNTER_ATTR(apr, CM_APR_COUNTER);
143
144static struct attribute *cm_counter_default_attrs[] = {
145 &cm_req_counter_attr.attr,
146 &cm_mra_counter_attr.attr,
147 &cm_rej_counter_attr.attr,
148 &cm_rep_counter_attr.attr,
149 &cm_rtu_counter_attr.attr,
150 &cm_dreq_counter_attr.attr,
151 &cm_drep_counter_attr.attr,
152 &cm_sidr_req_counter_attr.attr,
153 &cm_sidr_rep_counter_attr.attr,
154 &cm_lap_counter_attr.attr,
155 &cm_apr_counter_attr.attr,
156 NULL
157};
158
a977049d
HR		 159struct cm_port {
160 struct cm_device *cm_dev;
161 struct ib_mad_agent *mad_agent;
9af57b7a 162 struct kobject port_obj;
a977049d 163 u8 port_num;
9af57b7a 164 struct cm_counter_group counter_group[CM_COUNTER_GROUPS];
a977049d
HR		 165};
166
167struct cm_device {
168 struct list_head list;
d4c4196f 169 struct ib_device *ib_device;
110cf374 170 struct device *device;
1d846126 171 u8 ack_delay;
be4b4993 172 int going_down;
9af57b7a 173 struct cm_port *port[0];
a977049d
HR		 174};
175
176struct cm_av {
177 struct cm_port *port;
178 union ib_gid dgid;
179 struct ib_ah_attr ah_attr;
180 u16 pkey_index;
1d846126 181 u8 timeout;
dd5f03be
MB		 182 u8 valid;
183 u8 smac[ETH_ALEN];
a977049d
HR		 184};
185
186struct cm_work {
c4028958 187 struct delayed_work work;
a977049d
HR		 188 struct list_head list;
189 struct cm_port *port;
190 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
97f52eb4
SH		 191 __be32 local_id; /* Established / timewait */
192 __be32 remote_id;
a977049d
HR		 193 struct ib_cm_event cm_event;
194 struct ib_sa_path_rec path[0];
195};
196
197struct cm_timewait_info {
198 struct cm_work work; /* Must be first. */
8575329d 199 struct list_head list;
a977049d
HR		 200 struct rb_node remote_qp_node;
201 struct rb_node remote_id_node;
97f52eb4
SH		 202 __be64 remote_ca_guid;
203 __be32 remote_qpn;
a977049d
HR		 204 u8 inserted_remote_qp;
205 u8 inserted_remote_id;
206};
207
208struct cm_id_private {
209 struct ib_cm_id id;
210
211 struct rb_node service_node;
212 struct rb_node sidr_id_node;
87fd1a11 213 spinlock_t lock; /* Do not acquire inside cm.lock */
1b52fa98 214 struct completion comp;
a977049d 215 atomic_t refcount;
067b171b
HE		 216 /* Number of clients sharing this ib_cm_id. Only valid for listeners.
217 * Protected by the cm.lock spinlock. */
218 int listen_sharecount;
a977049d
HR		 219
220 struct ib_mad_send_buf *msg;
221 struct cm_timewait_info *timewait_info;
222 /* todo: use alternate port on send failure */
223 struct cm_av av;
224 struct cm_av alt_av;
6e61d04f 225 struct ib_cm_compare_data *compare_data;
a977049d
HR		 226
227 void *private_data;
97f52eb4
SH		 228 __be64 tid;
229 __be32 local_qpn;
230 __be32 remote_qpn;
ae7971a7 231 enum ib_qp_type qp_type;
97f52eb4
SH		 232 __be32 sq_psn;
233 __be32 rq_psn;
a977049d
HR		 234 int timeout_ms;
235 enum ib_mtu path_mtu;
e1444b5a 236 __be16 pkey;
a977049d
HR		 237 u8 private_data_len;
238 u8 max_cm_retries;
239 u8 peer_to_peer;
240 u8 responder_resources;
241 u8 initiator_depth;
a977049d
HR		 242 u8 retry_count;
243 u8 rnr_retry_count;
244 u8 service_timeout;
1d846126 245 u8 target_ack_delay;
a977049d
HR		 246
247 struct list_head work_list;
248 atomic_t work_count;
249};
250
c4028958 251static void cm_work_handler(struct work_struct *work);
a977049d
HR		 252
253static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
254{
255 if (atomic_dec_and_test(&cm_id_priv->refcount))
1b52fa98 256 complete(&cm_id_priv->comp);
a977049d
HR		 257}
258
259static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
260 struct ib_mad_send_buf **msg)
261{
262 struct ib_mad_agent *mad_agent;
263 struct ib_mad_send_buf *m;
264 struct ib_ah *ah;
265
266 mad_agent = cm_id_priv->av.port->mad_agent;
267 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
268 if (IS_ERR(ah))
269 return PTR_ERR(ah);
270
3cd96564 271 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
354ba39c 272 cm_id_priv->av.pkey_index,
34816ad9 273 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
da2dfaa3
IW		 274 GFP_ATOMIC,
275 IB_MGMT_BASE_VERSION);
a977049d
HR		 276 if (IS_ERR(m)) {
277 ib_destroy_ah(ah);
278 return PTR_ERR(m);
279 }
280
281 /* Timeout set by caller if response is expected. */
34816ad9
SH		 282 m->ah = ah;
283 m->retries = cm_id_priv->max_cm_retries;
a977049d
HR		 284
285 atomic_inc(&cm_id_priv->refcount);
286 m->context[0] = cm_id_priv;
287 *msg = m;
288 return 0;
289}
290
291static int cm_alloc_response_msg(struct cm_port *port,
292 struct ib_mad_recv_wc *mad_recv_wc,
293 struct ib_mad_send_buf **msg)
294{
295 struct ib_mad_send_buf *m;
296 struct ib_ah *ah;
297
298 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
299 mad_recv_wc->recv_buf.grh, port->port_num);
300 if (IS_ERR(ah))
301 return PTR_ERR(ah);
302
303 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
34816ad9 304 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
da2dfaa3
IW		 305 GFP_ATOMIC,
306 IB_MGMT_BASE_VERSION);
a977049d
HR		 307 if (IS_ERR(m)) {
308 ib_destroy_ah(ah);
309 return PTR_ERR(m);
310 }
34816ad9 311 m->ah = ah;
a977049d
HR		 312 *msg = m;
313 return 0;
314}
315
316static void cm_free_msg(struct ib_mad_send_buf *msg)
317{
34816ad9 318 ib_destroy_ah(msg->ah);
a977049d
HR		 319 if (msg->context[0])
320 cm_deref_id(msg->context[0]);
321 ib_free_send_mad(msg);
322}
323
324static void * cm_copy_private_data(const void *private_data,
325 u8 private_data_len)
326{
327 void *data;
328
329 if (!private_data || !private_data_len)
330 return NULL;
331
bed8bdfd 332 data = kmemdup(private_data, private_data_len, GFP_KERNEL);
a977049d
HR		 333 if (!data)
334 return ERR_PTR(-ENOMEM);
335
a977049d
HR		 336 return data;
337}
338
339static void cm_set_private_data(struct cm_id_private *cm_id_priv,
340 void *private_data, u8 private_data_len)
341{
342 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
343 kfree(cm_id_priv->private_data);
344
345 cm_id_priv->private_data = private_data;
346 cm_id_priv->private_data_len = private_data_len;
347}
348
ca222c6b
SH		 349static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
350 struct ib_grh *grh, struct cm_av *av)
a977049d
HR		 351{
352 av->port = port;
353 av->pkey_index = wc->pkey_index;
d4c4196f 354 ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc,
ca222c6b 355 grh, &av->ah_attr);
a977049d
HR		 356}
357
358static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
359{
360 struct cm_device *cm_dev;
361 struct cm_port *port = NULL;
362 unsigned long flags;
363 int ret;
364 u8 p;
365
366 read_lock_irqsave(&cm.device_lock, flags);
367 list_for_each_entry(cm_dev, &cm.device_list, list) {
d4c4196f 368 if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid,
a977049d 369 &p, NULL)) {
9af57b7a 370 port = cm_dev->port[p-1];
a977049d
HR		 371 break;
372 }
373 }
374 read_unlock_irqrestore(&cm.device_lock, flags);
375
376 if (!port)
377 return -EINVAL;
378
d4c4196f 379 ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num,
a977049d
HR		 380 be16_to_cpu(path->pkey), &av->pkey_index);
381 if (ret)
382 return ret;
383
384 av->port = port;
d4c4196f 385 ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path,
ca222c6b 386 &av->ah_attr);
1d846126 387 av->timeout = path->packet_life_time + 1;
dd5f03be
MB		 388 memcpy(av->smac, path->smac, sizeof(av->smac));
389
390 av->valid = 1;
a977049d
HR		 391 return 0;
392}
393
394static int cm_alloc_id(struct cm_id_private *cm_id_priv)
395{
396 unsigned long flags;
3b069c5d 397 int id;
a977049d 398
3b069c5d
TH		 399 idr_preload(GFP_KERNEL);
400 spin_lock_irqsave(&cm.lock, flags);
401
ab626d1a 402 id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT);
3b069c5d
TH		 403
404 spin_unlock_irqrestore(&cm.lock, flags);
405 idr_preload_end();
f06d2653 406
1b90c137 407 cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
3b069c5d 408 return id < 0 ? id : 0;
a977049d
HR		 409}
410
97f52eb4 411static void cm_free_id(__be32 local_id)
a977049d 412{
24be6e81 413 spin_lock_irq(&cm.lock);
f06d2653
SH		 414 idr_remove(&cm.local_id_table,
415 (__force int) (local_id ^ cm.random_id_operand));
24be6e81 416 spin_unlock_irq(&cm.lock);
a977049d
HR		 417}
418
97f52eb4 419static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 420{
421 struct cm_id_private *cm_id_priv;
422
f06d2653
SH		 423 cm_id_priv = idr_find(&cm.local_id_table,
424 (__force int) (local_id ^ cm.random_id_operand));
a977049d
HR		 425 if (cm_id_priv) {
426 if (cm_id_priv->id.remote_id == remote_id)
427 atomic_inc(&cm_id_priv->refcount);
428 else
429 cm_id_priv = NULL;
430 }
431
432 return cm_id_priv;
433}
434
97f52eb4 435static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 436{
437 struct cm_id_private *cm_id_priv;
a977049d 438
24be6e81 439 spin_lock_irq(&cm.lock);
a977049d 440 cm_id_priv = cm_get_id(local_id, remote_id);
24be6e81 441 spin_unlock_irq(&cm.lock);
a977049d
HR		 442
443 return cm_id_priv;
444}
445
0d0f738f 446static void cm_mask_copy(u32 *dst, const u32 *src, const u32 *mask)
6e61d04f
SH		 447{
448 int i;
449
0d0f738f
DA		 450 for (i = 0; i < IB_CM_COMPARE_SIZE; i++)
451 dst[i] = src[i] & mask[i];
6e61d04f
SH		 452}
453
454static int cm_compare_data(struct ib_cm_compare_data *src_data,
455 struct ib_cm_compare_data *dst_data)
456{
0d0f738f
DA		 457 u32 src[IB_CM_COMPARE_SIZE];
458 u32 dst[IB_CM_COMPARE_SIZE];
6e61d04f
SH		 459
460 if (!src_data || !dst_data)
461 return 0;
462
463 cm_mask_copy(src, src_data->data, dst_data->mask);
464 cm_mask_copy(dst, dst_data->data, src_data->mask);
0d0f738f 465 return memcmp(src, dst, sizeof(src));
6e61d04f
SH		 466}
467
0d0f738f 468static int cm_compare_private_data(u32 *private_data,
6e61d04f
SH		 469 struct ib_cm_compare_data *dst_data)
470{
0d0f738f 471 u32 src[IB_CM_COMPARE_SIZE];
6e61d04f
SH		 472
473 if (!dst_data)
474 return 0;
475
476 cm_mask_copy(src, private_data, dst_data->mask);
0d0f738f 477 return memcmp(src, dst_data->data, sizeof(src));
6e61d04f
SH		 478}
479
a88f4888
RD		 480/*
481 * Trivial helpers to strip endian annotation and compare; the
482 * endianness doesn't actually matter since we just need a stable
483 * order for the RB tree.
484 */
485static int be32_lt(__be32 a, __be32 b)
486{
487 return (__force u32) a < (__force u32) b;
488}
489
490static int be32_gt(__be32 a, __be32 b)
491{
492 return (__force u32) a > (__force u32) b;
493}
494
495static int be64_lt(__be64 a, __be64 b)
496{
497 return (__force u64) a < (__force u64) b;
498}
499
500static int be64_gt(__be64 a, __be64 b)
501{
502 return (__force u64) a > (__force u64) b;
503}
504
a977049d
HR		 505static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
506{
507 struct rb_node **link = &cm.listen_service_table.rb_node;
508 struct rb_node *parent = NULL;
509 struct cm_id_private *cur_cm_id_priv;
97f52eb4
SH		 510 __be64 service_id = cm_id_priv->id.service_id;
511 __be64 service_mask = cm_id_priv->id.service_mask;
6e61d04f 512 int data_cmp;
a977049d
HR		 513
514 while (*link) {
515 parent = *link;
516 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
517 service_node);
6e61d04f
SH		 518 data_cmp = cm_compare_data(cm_id_priv->compare_data,
519 cur_cm_id_priv->compare_data);
a977049d 520 if ((cur_cm_id_priv->id.service_mask & service_id) ==
07d357d0 521 (service_mask & cur_cm_id_priv->id.service_id) &&
6e61d04f
SH		 522 (cm_id_priv->id.device == cur_cm_id_priv->id.device) &&
523 !data_cmp)
07d357d0
SH		 524 return cur_cm_id_priv;
525
526 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
527 link = &(*link)->rb_left;
528 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
529 link = &(*link)->rb_right;
a88f4888 530 else if (be64_lt(service_id, cur_cm_id_priv->id.service_id))
a977049d 531 link = &(*link)->rb_left;
a88f4888 532 else if (be64_gt(service_id, cur_cm_id_priv->id.service_id))
6e61d04f
SH		 533 link = &(*link)->rb_right;
534 else if (data_cmp < 0)
535 link = &(*link)->rb_left;
a977049d
HR		 536 else
537 link = &(*link)->rb_right;
538 }
539 rb_link_node(&cm_id_priv->service_node, parent, link);
540 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
541 return NULL;
542}
543
07d357d0 544static struct cm_id_private * cm_find_listen(struct ib_device *device,
6e61d04f 545 __be64 service_id,
0d0f738f 546 u32 *private_data)
a977049d
HR		 547{
548 struct rb_node *node = cm.listen_service_table.rb_node;
549 struct cm_id_private *cm_id_priv;
6e61d04f 550 int data_cmp;
a977049d
HR		 551
552 while (node) {
553 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
6e61d04f
SH		 554 data_cmp = cm_compare_private_data(private_data,
555 cm_id_priv->compare_data);
a977049d 556 if ((cm_id_priv->id.service_mask & service_id) ==
07d357d0 557 cm_id_priv->id.service_id &&
6e61d04f 558 (cm_id_priv->id.device == device) && !data_cmp)
a977049d 559 return cm_id_priv;
07d357d0
SH		 560
561 if (device < cm_id_priv->id.device)
562 node = node->rb_left;
563 else if (device > cm_id_priv->id.device)
564 node = node->rb_right;
a88f4888 565 else if (be64_lt(service_id, cm_id_priv->id.service_id))
a977049d 566 node = node->rb_left;
a88f4888 567 else if (be64_gt(service_id, cm_id_priv->id.service_id))
6e61d04f
SH		 568 node = node->rb_right;
569 else if (data_cmp < 0)
570 node = node->rb_left;
a977049d
HR		 571 else
572 node = node->rb_right;
573 }
574 return NULL;
575}
576
577static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
578 *timewait_info)
579{
580 struct rb_node **link = &cm.remote_id_table.rb_node;
581 struct rb_node *parent = NULL;
582 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 583 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
584 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 585
586 while (*link) {
587 parent = *link;
588 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
589 remote_id_node);
a88f4888 590 if (be32_lt(remote_id, cur_timewait_info->work.remote_id))
a977049d 591 link = &(*link)->rb_left;
a88f4888 592 else if (be32_gt(remote_id, cur_timewait_info->work.remote_id))
a977049d 593 link = &(*link)->rb_right;
a88f4888 594 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d 595 link = &(*link)->rb_left;
a88f4888 596 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d
HR		 597 link = &(*link)->rb_right;
598 else
599 return cur_timewait_info;
600 }
601 timewait_info->inserted_remote_id = 1;
602 rb_link_node(&timewait_info->remote_id_node, parent, link);
603 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
604 return NULL;
605}
606
97f52eb4
SH		 607static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
608 __be32 remote_id)
a977049d
HR		 609{
610 struct rb_node *node = cm.remote_id_table.rb_node;
611 struct cm_timewait_info *timewait_info;
612
613 while (node) {
614 timewait_info = rb_entry(node, struct cm_timewait_info,
615 remote_id_node);
a88f4888 616 if (be32_lt(remote_id, timewait_info->work.remote_id))
a977049d 617 node = node->rb_left;
a88f4888 618 else if (be32_gt(remote_id, timewait_info->work.remote_id))
a977049d 619 node = node->rb_right;
a88f4888 620 else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid))
a977049d 621 node = node->rb_left;
a88f4888 622 else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid))
a977049d
HR		 623 node = node->rb_right;
624 else
625 return timewait_info;
626 }
627 return NULL;
628}
629
630static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
631 *timewait_info)
632{
633 struct rb_node **link = &cm.remote_qp_table.rb_node;
634 struct rb_node *parent = NULL;
635 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 636 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
637 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 638
639 while (*link) {
640 parent = *link;
641 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
642 remote_qp_node);
a88f4888 643 if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn))
a977049d 644 link = &(*link)->rb_left;
a88f4888 645 else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn))
a977049d 646 link = &(*link)->rb_right;
a88f4888 647 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d 648 link = &(*link)->rb_left;
a88f4888 649 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d
HR		 650 link = &(*link)->rb_right;
651 else
652 return cur_timewait_info;
653 }
654 timewait_info->inserted_remote_qp = 1;
655 rb_link_node(&timewait_info->remote_qp_node, parent, link);
656 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
657 return NULL;
658}
659
660static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
661 *cm_id_priv)
662{
663 struct rb_node **link = &cm.remote_sidr_table.rb_node;
664 struct rb_node *parent = NULL;
665 struct cm_id_private *cur_cm_id_priv;
666 union ib_gid *port_gid = &cm_id_priv->av.dgid;
97f52eb4 667 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 668
669 while (*link) {
670 parent = *link;
671 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
672 sidr_id_node);
a88f4888 673 if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id))
a977049d 674 link = &(*link)->rb_left;
a88f4888 675 else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id))
a977049d
HR		 676 link = &(*link)->rb_right;
677 else {
678 int cmp;
679 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
680 sizeof *port_gid);
681 if (cmp < 0)
682 link = &(*link)->rb_left;
683 else if (cmp > 0)
684 link = &(*link)->rb_right;
685 else
686 return cur_cm_id_priv;
687 }
688 }
689 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
690 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
691 return NULL;
692}
693
694static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
695 enum ib_cm_sidr_status status)
696{
697 struct ib_cm_sidr_rep_param param;
698
699 memset(&param, 0, sizeof param);
700 param.status = status;
701 ib_send_cm_sidr_rep(&cm_id_priv->id, &param);
702}
703
07d357d0
SH		 704struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
705 ib_cm_handler cm_handler,
a977049d
HR		 706 void *context)
707{
708 struct cm_id_private *cm_id_priv;
709 int ret;
710
de6eb66b 711 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
a977049d
HR		 712 if (!cm_id_priv)
713 return ERR_PTR(-ENOMEM);
714
a977049d 715 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 716 cm_id_priv->id.device = device;
a977049d
HR		 717 cm_id_priv->id.cm_handler = cm_handler;
718 cm_id_priv->id.context = context;
354ba39c 719 cm_id_priv->id.remote_cm_qpn = 1;
a977049d
HR		 720 ret = cm_alloc_id(cm_id_priv);
721 if (ret)
722 goto error;
723
724 spin_lock_init(&cm_id_priv->lock);
1b52fa98 725 init_completion(&cm_id_priv->comp);
a977049d
HR		 726 INIT_LIST_HEAD(&cm_id_priv->work_list);
727 atomic_set(&cm_id_priv->work_count, -1);
728 atomic_set(&cm_id_priv->refcount, 1);
729 return &cm_id_priv->id;
730
731error:
732 kfree(cm_id_priv);
733 return ERR_PTR(-ENOMEM);
734}
735EXPORT_SYMBOL(ib_create_cm_id);
736
737static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
738{
739 struct cm_work *work;
740
741 if (list_empty(&cm_id_priv->work_list))
742 return NULL;
743
744 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
745 list_del(&work->list);
746 return work;
747}
748
749static void cm_free_work(struct cm_work *work)
750{
751 if (work->mad_recv_wc)
752 ib_free_recv_mad(work->mad_recv_wc);
753 kfree(work);
754}
755
756static inline int cm_convert_to_ms(int iba_time)
757{
758 /* approximate conversion to ms from 4.096us x 2^iba_time */
759 return 1 << max(iba_time - 8, 0);
760}
761
1d846126
SH		 762/*
763 * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
764 * Because of how ack_timeout is stored, adding one doubles the timeout.
765 * To avoid large timeouts, select the max(ack_delay, life_time + 1), and
766 * increment it (round up) only if the other is within 50%.
767 */
768static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time)
769{
770 int ack_timeout = packet_life_time + 1;
771
772 if (ack_timeout >= ca_ack_delay)
773 ack_timeout += (ca_ack_delay >= (ack_timeout - 1));
774 else
775 ack_timeout = ca_ack_delay +
776 (ack_timeout >= (ca_ack_delay - 1));
777
778 return min(31, ack_timeout);
779}
780
a977049d
HR		 781static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
782{
a977049d
HR		 783 if (timewait_info->inserted_remote_id) {
784 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
785 timewait_info->inserted_remote_id = 0;
786 }
787
788 if (timewait_info->inserted_remote_qp) {
789 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
790 timewait_info->inserted_remote_qp = 0;
791 }
a977049d
HR		 792}
793
97f52eb4 794static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
a977049d
HR		 795{
796 struct cm_timewait_info *timewait_info;
797
de6eb66b 798 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
a977049d
HR		 799 if (!timewait_info)
800 return ERR_PTR(-ENOMEM);
a977049d
HR		 801
802 timewait_info->work.local_id = local_id;
c4028958 803 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
a977049d
HR		 804 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
805 return timewait_info;
806}
807
808static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
809{
810 int wait_time;
8575329d 811 unsigned long flags;
be4b4993
ES		 812 struct cm_device *cm_dev;
813
814 cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client);
815 if (!cm_dev)
816 return;
a977049d 817
8575329d 818 spin_lock_irqsave(&cm.lock, flags);
a70d0590 819 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d
SH		 820 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
821 spin_unlock_irqrestore(&cm.lock, flags);
a70d0590 822
a977049d
HR		 823 /*
824 * The cm_id could be destroyed by the user before we exit timewait.
825 * To protect against this, we search for the cm_id after exiting
826 * timewait before notifying the user that we've exited timewait.
827 */
828 cm_id_priv->id.state = IB_CM_TIMEWAIT;
1d846126 829 wait_time = cm_convert_to_ms(cm_id_priv->av.timeout);
be4b4993
ES		 830
831 /* Check if the device started its remove_one */
832 spin_lock_irq(&cm.lock);
833 if (!cm_dev->going_down)
834 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
835 msecs_to_jiffies(wait_time));
836 spin_unlock_irq(&cm.lock);
837
a977049d
HR		 838 cm_id_priv->timewait_info = NULL;
839}
840
841static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
842{
8575329d
SH		 843 unsigned long flags;
844
a977049d
HR		 845 cm_id_priv->id.state = IB_CM_IDLE;
846 if (cm_id_priv->timewait_info) {
8575329d 847 spin_lock_irqsave(&cm.lock, flags);
a977049d 848 cm_cleanup_timewait(cm_id_priv->timewait_info);
8575329d 849 spin_unlock_irqrestore(&cm.lock, flags);
a977049d
HR		 850 kfree(cm_id_priv->timewait_info);
851 cm_id_priv->timewait_info = NULL;
852 }
853}
854
04c33543 855static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
a977049d
HR		 856{
857 struct cm_id_private *cm_id_priv;
858 struct cm_work *work;
a977049d
HR		 859
860 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
861retest:
24be6e81 862 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 863 switch (cm_id->state) {
864 case IB_CM_LISTEN:
24be6e81 865 spin_unlock_irq(&cm_id_priv->lock);
067b171b 866
24be6e81 867 spin_lock_irq(&cm.lock);
067b171b
HE		 868 if (--cm_id_priv->listen_sharecount > 0) {
869 /* The id is still shared. */
870 cm_deref_id(cm_id_priv);
871 spin_unlock_irq(&cm.lock);
872 return;
873 }
a977049d 874 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
24be6e81 875 spin_unlock_irq(&cm.lock);
a977049d
HR		 876 break;
877 case IB_CM_SIDR_REQ_SENT:
878 cm_id->state = IB_CM_IDLE;
34816ad9 879 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
24be6e81 880 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 881 break;
882 case IB_CM_SIDR_REQ_RCVD:
24be6e81 883 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 884 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
885 break;
886 case IB_CM_REQ_SENT:
c29ed5a4 887 case IB_CM_MRA_REQ_RCVD:
227eca83 888 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
24be6e81 889 spin_unlock_irq(&cm_id_priv->lock);
227eca83 890 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
e971b8cd
SH		 891 &cm_id_priv->id.device->node_guid,
892 sizeof cm_id_priv->id.device->node_guid,
227eca83
SH		 893 NULL, 0);
894 break;
04c33543
MT		 895 case IB_CM_REQ_RCVD:
896 if (err == -ENOMEM) {
897 /* Do not reject to allow future retries. */
898 cm_reset_to_idle(cm_id_priv);
24be6e81 899 spin_unlock_irq(&cm_id_priv->lock);
04c33543 900 } else {
24be6e81 901 spin_unlock_irq(&cm_id_priv->lock);
04c33543
MT		 902 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
903 NULL, 0, NULL, 0);
904 }
905 break;
a977049d
HR		 906 case IB_CM_REP_SENT:
907 case IB_CM_MRA_REP_RCVD:
34816ad9 908 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 909 /* Fall through */
a977049d
HR		 910 case IB_CM_MRA_REQ_SENT:
911 case IB_CM_REP_RCVD:
912 case IB_CM_MRA_REP_SENT:
24be6e81 913 spin_unlock_irq(&cm_id_priv->lock);
227eca83
SH		 914 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
915 NULL, 0, NULL, 0);
a977049d
HR		 916 break;
917 case IB_CM_ESTABLISHED:
24be6e81 918 spin_unlock_irq(&cm_id_priv->lock);
2622e18e
SH		 919 if (cm_id_priv->qp_type == IB_QPT_XRC_TGT)
920 break;
a977049d
HR		 921 ib_send_cm_dreq(cm_id, NULL, 0);
922 goto retest;
923 case IB_CM_DREQ_SENT:
34816ad9 924 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d 925 cm_enter_timewait(cm_id_priv);
24be6e81 926 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 927 break;
928 case IB_CM_DREQ_RCVD:
24be6e81 929 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 930 ib_send_cm_drep(cm_id, NULL, 0);
931 break;
932 default:
24be6e81 933 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 934 break;
935 }
936
937 cm_free_id(cm_id->local_id);
1b52fa98
SH		 938 cm_deref_id(cm_id_priv);
939 wait_for_completion(&cm_id_priv->comp);
a977049d
HR		 940 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
941 cm_free_work(work);
6e61d04f
SH		 942 kfree(cm_id_priv->compare_data);
943 kfree(cm_id_priv->private_data);
a977049d
HR		 944 kfree(cm_id_priv);
945}
04c33543
MT		 946
947void ib_destroy_cm_id(struct ib_cm_id *cm_id)
948{
949 cm_destroy_id(cm_id, 0);
950}
a977049d
HR		 951EXPORT_SYMBOL(ib_destroy_cm_id);
952
067b171b
HE		 953/**
954 * __ib_cm_listen - Initiates listening on the specified service ID for
955 * connection and service ID resolution requests.
956 * @cm_id: Connection identifier associated with the listen request.
957 * @service_id: Service identifier matched against incoming connection
958 * and service ID resolution requests. The service ID should be specified
959 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
960 * assign a service ID to the caller.
961 * @service_mask: Mask applied to service ID used to listen across a
962 * range of service IDs. If set to 0, the service ID is matched
963 * exactly. This parameter is ignored if %service_id is set to
964 * IB_CM_ASSIGN_SERVICE_ID.
965 * @compare_data: This parameter is optional. It specifies data that must
966 * appear in the private data of a connection request for the specified
967 * listen request.
968 * @lock: If set, lock the cm.lock spin-lock when adding the id to the
969 * listener tree. When false, the caller must already hold the spin-lock,
970 * and compare_data must be NULL.
971 */
972static int __ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id,
973 __be64 service_mask,
974 struct ib_cm_compare_data *compare_data,
975 bool lock)
a977049d
HR		 976{
977 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
067b171b 978 unsigned long flags = 0;
a977049d
HR		 979 int ret = 0;
980
9c3da099 981 service_mask = service_mask ? service_mask : ~cpu_to_be64(0);
a977049d
HR		 982 service_id &= service_mask;
983 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
984 (service_id != IB_CM_ASSIGN_SERVICE_ID))
985 return -EINVAL;
986
987 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
6e61d04f
SH		 988 if (cm_id->state != IB_CM_IDLE)
989 return -EINVAL;
990
991 if (compare_data) {
992 cm_id_priv->compare_data = kzalloc(sizeof *compare_data,
993 GFP_KERNEL);
994 if (!cm_id_priv->compare_data)
995 return -ENOMEM;
996 cm_mask_copy(cm_id_priv->compare_data->data,
997 compare_data->data, compare_data->mask);
998 memcpy(cm_id_priv->compare_data->mask, compare_data->mask,
0d0f738f 999 sizeof(compare_data->mask));
6e61d04f 1000 }
a977049d
HR		 1001
1002 cm_id->state = IB_CM_LISTEN;
067b171b
HE		 1003 if (lock)
1004 spin_lock_irqsave(&cm.lock, flags);
a977049d 1005
067b171b 1006 ++cm_id_priv->listen_sharecount;
a977049d 1007 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
97f52eb4 1008 cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
9c3da099 1009 cm_id->service_mask = ~cpu_to_be64(0);
a977049d
HR		 1010 } else {
1011 cm_id->service_id = service_id;
1012 cm_id->service_mask = service_mask;
1013 }
1014 cur_cm_id_priv = cm_insert_listen(cm_id_priv);
a977049d
HR		 1015
1016 if (cur_cm_id_priv) {
1017 cm_id->state = IB_CM_IDLE;
067b171b 1018 --cm_id_priv->listen_sharecount;
6e61d04f
SH		 1019 kfree(cm_id_priv->compare_data);
1020 cm_id_priv->compare_data = NULL;
a977049d
HR		 1021 ret = -EBUSY;
1022 }
067b171b
HE		 1023
1024 if (lock)
1025 spin_unlock_irqrestore(&cm.lock, flags);
1026
a977049d
HR		 1027 return ret;
1028}
067b171b
HE		 1029
1030int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
1031 struct ib_cm_compare_data *compare_data)
1032{
1033 return __ib_cm_listen(cm_id, service_id, service_mask, compare_data,
1034 true);
1035}
a977049d
HR		 1036EXPORT_SYMBOL(ib_cm_listen);
1037
067b171b
HE		 1038/**
1039 * Create a new listening ib_cm_id and listen on the given service ID.
1040 *
1041 * If there's an existing ID listening on that same device and service ID,
1042 * return it.
1043 *
1044 * @device: Device associated with the cm_id. All related communication will
1045 * be associated with the specified device.
1046 * @cm_handler: Callback invoked to notify the user of CM events.
1047 * @service_id: Service identifier matched against incoming connection
1048 * and service ID resolution requests. The service ID should be specified
1049 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
1050 * assign a service ID to the caller.
1051 *
1052 * Callers should call ib_destroy_cm_id when done with the listener ID.
1053 */
1054struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
1055 ib_cm_handler cm_handler,
1056 __be64 service_id)
1057{
1058 struct cm_id_private *cm_id_priv;
1059 struct ib_cm_id *cm_id;
1060 unsigned long flags;
1061 int err = 0;
1062
1063 /* Create an ID in advance, since the creation may sleep */
1064 cm_id = ib_create_cm_id(device, cm_handler, NULL);
1065 if (IS_ERR(cm_id))
1066 return cm_id;
1067
1068 spin_lock_irqsave(&cm.lock, flags);
1069
1070 if (service_id == IB_CM_ASSIGN_SERVICE_ID)
1071 goto new_id;
1072
1073 /* Find an existing ID */
1074 cm_id_priv = cm_find_listen(device, service_id, NULL);
1075 if (cm_id_priv) {
1076 if (cm_id->cm_handler != cm_handler || cm_id->context) {
1077 /* Sharing an ib_cm_id with different handlers is not
1078 * supported */
1079 spin_unlock_irqrestore(&cm.lock, flags);
1080 return ERR_PTR(-EINVAL);
1081 }
1082 atomic_inc(&cm_id_priv->refcount);
1083 ++cm_id_priv->listen_sharecount;
1084 spin_unlock_irqrestore(&cm.lock, flags);
1085
1086 ib_destroy_cm_id(cm_id);
1087 cm_id = &cm_id_priv->id;
1088 return cm_id;
1089 }
1090
1091new_id:
1092 /* Use newly created ID */
1093 err = __ib_cm_listen(cm_id, service_id, 0, NULL, false);
1094
1095 spin_unlock_irqrestore(&cm.lock, flags);
1096
1097 if (err) {
1098 ib_destroy_cm_id(cm_id);
1099 return ERR_PTR(err);
1100 }
1101 return cm_id;
1102}
1103EXPORT_SYMBOL(ib_cm_insert_listen);
1104
97f52eb4
SH		 1105static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
1106 enum cm_msg_sequence msg_seq)
a977049d
HR		 1107{
1108 u64 hi_tid, low_tid;
1109
1110 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
97f52eb4
SH		 1111 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
1112 (msg_seq << 30));
a977049d
HR		 1113 return cpu_to_be64(hi_tid | low_tid);
1114}
1115
1116static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 1117 __be16 attr_id, __be64 tid)
a977049d
HR		 1118{
1119 hdr->base_version = IB_MGMT_BASE_VERSION;
1120 hdr->mgmt_class = IB_MGMT_CLASS_CM;
1121 hdr->class_version = IB_CM_CLASS_VERSION;
1122 hdr->method = IB_MGMT_METHOD_SEND;
1123 hdr->attr_id = attr_id;
1124 hdr->tid = tid;
1125}
1126
1127static void cm_format_req(struct cm_req_msg *req_msg,
1128 struct cm_id_private *cm_id_priv,
1129 struct ib_cm_req_param *param)
1130{
3971c9f6
SH		 1131 struct ib_sa_path_rec *pri_path = param->primary_path;
1132 struct ib_sa_path_rec *alt_path = param->alternate_path;
1133
a977049d
HR		 1134 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
1135 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
1136
1137 req_msg->local_comm_id = cm_id_priv->id.local_id;
1138 req_msg->service_id = param->service_id;
e971b8cd 1139 req_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
a977049d 1140 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
a977049d
HR		 1141 cm_req_set_init_depth(req_msg, param->initiator_depth);
1142 cm_req_set_remote_resp_timeout(req_msg,
1143 param->remote_cm_response_timeout);
1144 cm_req_set_qp_type(req_msg, param->qp_type);
1145 cm_req_set_flow_ctrl(req_msg, param->flow_control);
1146 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
1147 cm_req_set_local_resp_timeout(req_msg,
1148 param->local_cm_response_timeout);
a977049d
HR		 1149 req_msg->pkey = param->primary_path->pkey;
1150 cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
a977049d 1151 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
d26a360b
SH		 1152
1153 if (param->qp_type != IB_QPT_XRC_INI) {
1154 cm_req_set_resp_res(req_msg, param->responder_resources);
1155 cm_req_set_retry_count(req_msg, param->retry_count);
1156 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
1157 cm_req_set_srq(req_msg, param->srq);
1158 }
a977049d 1159
3971c9f6
SH		 1160 if (pri_path->hop_limit <= 1) {
1161 req_msg->primary_local_lid = pri_path->slid;
1162 req_msg->primary_remote_lid = pri_path->dlid;
1163 } else {
1164 /* Work-around until there's a way to obtain remote LID info */
1165 req_msg->primary_local_lid = IB_LID_PERMISSIVE;
1166 req_msg->primary_remote_lid = IB_LID_PERMISSIVE;
1167 }
1168 req_msg->primary_local_gid = pri_path->sgid;
1169 req_msg->primary_remote_gid = pri_path->dgid;
1170 cm_req_set_primary_flow_label(req_msg, pri_path->flow_label);
1171 cm_req_set_primary_packet_rate(req_msg, pri_path->rate);
1172 req_msg->primary_traffic_class = pri_path->traffic_class;
1173 req_msg->primary_hop_limit = pri_path->hop_limit;
1174 cm_req_set_primary_sl(req_msg, pri_path->sl);
1175 cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1));
a977049d 1176 cm_req_set_primary_local_ack_timeout(req_msg,
1d846126 1177 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
3971c9f6 1178 pri_path->packet_life_time));
a977049d 1179
3971c9f6
SH		 1180 if (alt_path) {
1181 if (alt_path->hop_limit <= 1) {
1182 req_msg->alt_local_lid = alt_path->slid;
1183 req_msg->alt_remote_lid = alt_path->dlid;
1184 } else {
1185 req_msg->alt_local_lid = IB_LID_PERMISSIVE;
1186 req_msg->alt_remote_lid = IB_LID_PERMISSIVE;
1187 }
1188 req_msg->alt_local_gid = alt_path->sgid;
1189 req_msg->alt_remote_gid = alt_path->dgid;
a977049d 1190 cm_req_set_alt_flow_label(req_msg,
3971c9f6
SH		 1191 alt_path->flow_label);
1192 cm_req_set_alt_packet_rate(req_msg, alt_path->rate);
1193 req_msg->alt_traffic_class = alt_path->traffic_class;
1194 req_msg->alt_hop_limit = alt_path->hop_limit;
1195 cm_req_set_alt_sl(req_msg, alt_path->sl);
1196 cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1));
a977049d 1197 cm_req_set_alt_local_ack_timeout(req_msg,
1d846126 1198 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
3971c9f6 1199 alt_path->packet_life_time));
a977049d
HR		 1200 }
1201
1202 if (param->private_data && param->private_data_len)
1203 memcpy(req_msg->private_data, param->private_data,
1204 param->private_data_len);
1205}
1206
858119e1 1207static int cm_validate_req_param(struct ib_cm_req_param *param)
a977049d
HR		 1208{
1209 /* peer-to-peer not supported */
1210 if (param->peer_to_peer)
1211 return -EINVAL;
1212
1213 if (!param->primary_path)
1214 return -EINVAL;
1215
d26a360b
SH		 1216 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC &&
1217 param->qp_type != IB_QPT_XRC_INI)
a977049d
HR		 1218 return -EINVAL;
1219
1220 if (param->private_data &&
1221 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
1222 return -EINVAL;
1223
1224 if (param->alternate_path &&
1225 (param->alternate_path->pkey != param->primary_path->pkey ||
1226 param->alternate_path->mtu != param->primary_path->mtu))
1227 return -EINVAL;
1228
1229 return 0;
1230}
1231
1232int ib_send_cm_req(struct ib_cm_id *cm_id,
1233 struct ib_cm_req_param *param)
1234{
1235 struct cm_id_private *cm_id_priv;
a977049d
HR		 1236 struct cm_req_msg *req_msg;
1237 unsigned long flags;
1238 int ret;
1239
1240 ret = cm_validate_req_param(param);
1241 if (ret)
1242 return ret;
1243
1244 /* Verify that we're not in timewait. */
1245 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1246 spin_lock_irqsave(&cm_id_priv->lock, flags);
1247 if (cm_id->state != IB_CM_IDLE) {
1248 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1249 ret = -EINVAL;
1250 goto out;
1251 }
1252 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1253
1254 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1255 id.local_id);
75df23e2
SH		 1256 if (IS_ERR(cm_id_priv->timewait_info)) {
1257 ret = PTR_ERR(cm_id_priv->timewait_info);
a977049d 1258 goto out;
75df23e2 1259 }
a977049d
HR		 1260
1261 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
1262 if (ret)
1263 goto error1;
1264 if (param->alternate_path) {
1265 ret = cm_init_av_by_path(param->alternate_path,
1266 &cm_id_priv->alt_av);
1267 if (ret)
1268 goto error1;
1269 }
1270 cm_id->service_id = param->service_id;
9c3da099 1271 cm_id->service_mask = ~cpu_to_be64(0);
a977049d
HR		 1272 cm_id_priv->timeout_ms = cm_convert_to_ms(
1273 param->primary_path->packet_life_time) * 2 +
1274 cm_convert_to_ms(
1275 param->remote_cm_response_timeout);
1276 cm_id_priv->max_cm_retries = param->max_cm_retries;
1277 cm_id_priv->initiator_depth = param->initiator_depth;
1278 cm_id_priv->responder_resources = param->responder_resources;
1279 cm_id_priv->retry_count = param->retry_count;
1280 cm_id_priv->path_mtu = param->primary_path->mtu;
e1444b5a 1281 cm_id_priv->pkey = param->primary_path->pkey;
ae7971a7 1282 cm_id_priv->qp_type = param->qp_type;
a977049d
HR		 1283
1284 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1285 if (ret)
1286 goto error1;
1287
1288 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1289 cm_format_req(req_msg, cm_id_priv, param);
1290 cm_id_priv->tid = req_msg->hdr.tid;
34816ad9 1291 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1292 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1293
1294 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
1295 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
a977049d
HR		 1296
1297 spin_lock_irqsave(&cm_id_priv->lock, flags);
34816ad9 1298 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
a977049d
HR		 1299 if (ret) {
1300 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1301 goto error2;
1302 }
1303 BUG_ON(cm_id->state != IB_CM_IDLE);
1304 cm_id->state = IB_CM_REQ_SENT;
1305 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1306 return 0;
1307
1308error2: cm_free_msg(cm_id_priv->msg);
1309error1: kfree(cm_id_priv->timewait_info);
1310out: return ret;
1311}
1312EXPORT_SYMBOL(ib_send_cm_req);
1313
1314static int cm_issue_rej(struct cm_port *port,
1315 struct ib_mad_recv_wc *mad_recv_wc,
1316 enum ib_cm_rej_reason reason,
1317 enum cm_msg_response msg_rejected,
1318 void *ari, u8 ari_length)
1319{
1320 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1321 struct cm_rej_msg *rej_msg, *rcv_msg;
1322 int ret;
1323
1324 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1325 if (ret)
1326 return ret;
1327
1328 /* We just need common CM header information. Cast to any message. */
1329 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1330 rej_msg = (struct cm_rej_msg *) msg->mad;
1331
1332 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1333 rej_msg->remote_comm_id = rcv_msg->local_comm_id;
1334 rej_msg->local_comm_id = rcv_msg->remote_comm_id;
1335 cm_rej_set_msg_rejected(rej_msg, msg_rejected);
97f52eb4 1336 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1337
1338 if (ari && ari_length) {
1339 cm_rej_set_reject_info_len(rej_msg, ari_length);
1340 memcpy(rej_msg->ari, ari, ari_length);
1341 }
1342
34816ad9 1343 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1344 if (ret)
1345 cm_free_msg(msg);
1346
1347 return ret;
1348}
1349
97f52eb4
SH		 1350static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
1351 __be32 local_qpn, __be32 remote_qpn)
a977049d
HR		 1352{
1353 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
1354 ((local_ca_guid == remote_ca_guid) &&
1355 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
1356}
1357
858119e1 1358static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
a977049d
HR		 1359 struct ib_sa_path_rec *primary_path,
1360 struct ib_sa_path_rec *alt_path)
1361{
1362 memset(primary_path, 0, sizeof *primary_path);
1363 primary_path->dgid = req_msg->primary_local_gid;
1364 primary_path->sgid = req_msg->primary_remote_gid;
1365 primary_path->dlid = req_msg->primary_local_lid;
1366 primary_path->slid = req_msg->primary_remote_lid;
1367 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
1368 primary_path->hop_limit = req_msg->primary_hop_limit;
1369 primary_path->traffic_class = req_msg->primary_traffic_class;
1370 primary_path->reversible = 1;
1371 primary_path->pkey = req_msg->pkey;
1372 primary_path->sl = cm_req_get_primary_sl(req_msg);
1373 primary_path->mtu_selector = IB_SA_EQ;
1374 primary_path->mtu = cm_req_get_path_mtu(req_msg);
1375 primary_path->rate_selector = IB_SA_EQ;
1376 primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
1377 primary_path->packet_life_time_selector = IB_SA_EQ;
1378 primary_path->packet_life_time =
1379 cm_req_get_primary_local_ack_timeout(req_msg);
1380 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
15865e7d 1381 primary_path->service_id = req_msg->service_id;
a977049d
HR		 1382
1383 if (req_msg->alt_local_lid) {
1384 memset(alt_path, 0, sizeof *alt_path);
1385 alt_path->dgid = req_msg->alt_local_gid;
1386 alt_path->sgid = req_msg->alt_remote_gid;
1387 alt_path->dlid = req_msg->alt_local_lid;
1388 alt_path->slid = req_msg->alt_remote_lid;
1389 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
1390 alt_path->hop_limit = req_msg->alt_hop_limit;
1391 alt_path->traffic_class = req_msg->alt_traffic_class;
1392 alt_path->reversible = 1;
1393 alt_path->pkey = req_msg->pkey;
1394 alt_path->sl = cm_req_get_alt_sl(req_msg);
1395 alt_path->mtu_selector = IB_SA_EQ;
1396 alt_path->mtu = cm_req_get_path_mtu(req_msg);
1397 alt_path->rate_selector = IB_SA_EQ;
1398 alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
1399 alt_path->packet_life_time_selector = IB_SA_EQ;
1400 alt_path->packet_life_time =
1401 cm_req_get_alt_local_ack_timeout(req_msg);
1402 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
15865e7d 1403 alt_path->service_id = req_msg->service_id;
a977049d
HR		 1404 }
1405}
1406
1407static void cm_format_req_event(struct cm_work *work,
1408 struct cm_id_private *cm_id_priv,
1409 struct ib_cm_id *listen_id)
1410{
1411 struct cm_req_msg *req_msg;
1412 struct ib_cm_req_event_param *param;
1413
1414 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1415 param = &work->cm_event.param.req_rcvd;
1416 param->listen_id = listen_id;
a977049d
HR		 1417 param->port = cm_id_priv->av.port->port_num;
1418 param->primary_path = &work->path[0];
1419 if (req_msg->alt_local_lid)
1420 param->alternate_path = &work->path[1];
1421 else
1422 param->alternate_path = NULL;
1423 param->remote_ca_guid = req_msg->local_ca_guid;
1424 param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
1425 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
1426 param->qp_type = cm_req_get_qp_type(req_msg);
1427 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
1428 param->responder_resources = cm_req_get_init_depth(req_msg);
1429 param->initiator_depth = cm_req_get_resp_res(req_msg);
1430 param->local_cm_response_timeout =
1431 cm_req_get_remote_resp_timeout(req_msg);
1432 param->flow_control = cm_req_get_flow_ctrl(req_msg);
1433 param->remote_cm_response_timeout =
1434 cm_req_get_local_resp_timeout(req_msg);
1435 param->retry_count = cm_req_get_retry_count(req_msg);
1436 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
1437 param->srq = cm_req_get_srq(req_msg);
1438 work->cm_event.private_data = &req_msg->private_data;
1439}
1440
1441static void cm_process_work(struct cm_id_private *cm_id_priv,
1442 struct cm_work *work)
1443{
a977049d
HR		 1444 int ret;
1445
1446 /* We will typically only have the current event to report. */
1447 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1448 cm_free_work(work);
1449
1450 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
24be6e81 1451 spin_lock_irq(&cm_id_priv->lock);
a977049d 1452 work = cm_dequeue_work(cm_id_priv);
24be6e81 1453 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1454 BUG_ON(!work);
1455 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1456 &work->cm_event);
1457 cm_free_work(work);
1458 }
1459 cm_deref_id(cm_id_priv);
1460 if (ret)
04c33543 1461 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 1462}
1463
1464static void cm_format_mra(struct cm_mra_msg *mra_msg,
1465 struct cm_id_private *cm_id_priv,
1466 enum cm_msg_response msg_mraed, u8 service_timeout,
1467 const void *private_data, u8 private_data_len)
1468{
1469 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1470 cm_mra_set_msg_mraed(mra_msg, msg_mraed);
1471 mra_msg->local_comm_id = cm_id_priv->id.local_id;
1472 mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
1473 cm_mra_set_service_timeout(mra_msg, service_timeout);
1474
1475 if (private_data && private_data_len)
1476 memcpy(mra_msg->private_data, private_data, private_data_len);
1477}
1478
1479static void cm_format_rej(struct cm_rej_msg *rej_msg,
1480 struct cm_id_private *cm_id_priv,
1481 enum ib_cm_rej_reason reason,
1482 void *ari,
1483 u8 ari_length,
1484 const void *private_data,
1485 u8 private_data_len)
1486{
1487 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1488 rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
1489
1490 switch(cm_id_priv->id.state) {
1491 case IB_CM_REQ_RCVD:
1492 rej_msg->local_comm_id = 0;
1493 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1494 break;
1495 case IB_CM_MRA_REQ_SENT:
1496 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1497 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
1498 break;
1499 case IB_CM_REP_RCVD:
1500 case IB_CM_MRA_REP_SENT:
1501 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1502 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
1503 break;
1504 default:
1505 rej_msg->local_comm_id = cm_id_priv->id.local_id;
1506 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
1507 break;
1508 }
1509
97f52eb4 1510 rej_msg->reason = cpu_to_be16(reason);
a977049d
HR		 1511 if (ari && ari_length) {
1512 cm_rej_set_reject_info_len(rej_msg, ari_length);
1513 memcpy(rej_msg->ari, ari, ari_length);
1514 }
1515
1516 if (private_data && private_data_len)
1517 memcpy(rej_msg->private_data, private_data, private_data_len);
1518}
1519
1520static void cm_dup_req_handler(struct cm_work *work,
1521 struct cm_id_private *cm_id_priv)
1522{
1523 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1524 int ret;
1525
9af57b7a
SH		 1526 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1527 counter[CM_REQ_COUNTER]);
1528
a977049d
HR		 1529 /* Quick state check to discard duplicate REQs. */
1530 if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
1531 return;
1532
1533 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1534 if (ret)
1535 return;
1536
24be6e81 1537 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 1538 switch (cm_id_priv->id.state) {
1539 case IB_CM_MRA_REQ_SENT:
1540 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1541 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1542 cm_id_priv->private_data,
1543 cm_id_priv->private_data_len);
1544 break;
1545 case IB_CM_TIMEWAIT:
1546 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
1547 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
1548 break;
1549 default:
1550 goto unlock;
1551 }
24be6e81 1552 spin_unlock_irq(&cm_id_priv->lock);
a977049d 1553
34816ad9 1554 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1555 if (ret)
1556 goto free;
1557 return;
1558
24be6e81 1559unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1560free: cm_free_msg(msg);
1561}
1562
1563static struct cm_id_private * cm_match_req(struct cm_work *work,
1564 struct cm_id_private *cm_id_priv)
1565{
1566 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1567 struct cm_timewait_info *timewait_info;
1568 struct cm_req_msg *req_msg;
a977049d
HR		 1569
1570 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1571
d998ccce 1572 /* Check for possible duplicate REQ. */
24be6e81 1573 spin_lock_irq(&cm.lock);
a977049d 1574 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
a977049d
HR		 1575 if (timewait_info) {
1576 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
1577 timewait_info->work.remote_id);
24be6e81 1578 spin_unlock_irq(&cm.lock);
a977049d
HR		 1579 if (cur_cm_id_priv) {
1580 cm_dup_req_handler(work, cur_cm_id_priv);
1581 cm_deref_id(cur_cm_id_priv);
d998ccce
SH		 1582 }
1583 return NULL;
1584 }
1585
1586 /* Check for stale connections. */
1587 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
1588 if (timewait_info) {
1589 cm_cleanup_timewait(cm_id_priv->timewait_info);
24be6e81 1590 spin_unlock_irq(&cm.lock);
d998ccce
SH		 1591 cm_issue_rej(work->port, work->mad_recv_wc,
1592 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
1593 NULL, 0);
1594 return NULL;
a977049d
HR		 1595 }
1596
1597 /* Find matching listen request. */
07d357d0 1598 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
6e61d04f
SH		 1599 req_msg->service_id,
1600 req_msg->private_data);
a977049d 1601 if (!listen_cm_id_priv) {
8575329d 1602 cm_cleanup_timewait(cm_id_priv->timewait_info);
24be6e81 1603 spin_unlock_irq(&cm.lock);
a977049d
HR		 1604 cm_issue_rej(work->port, work->mad_recv_wc,
1605 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
1606 NULL, 0);
8575329d 1607 goto out;
a977049d
HR		 1608 }
1609 atomic_inc(&listen_cm_id_priv->refcount);
1610 atomic_inc(&cm_id_priv->refcount);
1611 cm_id_priv->id.state = IB_CM_REQ_RCVD;
1612 atomic_inc(&cm_id_priv->work_count);
24be6e81 1613 spin_unlock_irq(&cm.lock);
8575329d 1614out:
a977049d 1615 return listen_cm_id_priv;
a977049d
HR		 1616}
1617
3971c9f6
SH		 1618/*
1619 * Work-around for inter-subnet connections. If the LIDs are permissive,
1620 * we need to override the LID/SL data in the REQ with the LID information
1621 * in the work completion.
1622 */
1623static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
1624{
1625 if (!cm_req_get_primary_subnet_local(req_msg)) {
1626 if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) {
1627 req_msg->primary_local_lid = cpu_to_be16(wc->slid);
1628 cm_req_set_primary_sl(req_msg, wc->sl);
1629 }
1630
1631 if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE)
1632 req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits);
1633 }
1634
1635 if (!cm_req_get_alt_subnet_local(req_msg)) {
1636 if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) {
1637 req_msg->alt_local_lid = cpu_to_be16(wc->slid);
1638 cm_req_set_alt_sl(req_msg, wc->sl);
1639 }
1640
1641 if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE)
1642 req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits);
1643 }
1644}
1645
a977049d
HR		 1646static int cm_req_handler(struct cm_work *work)
1647{
1648 struct ib_cm_id *cm_id;
1649 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
1650 struct cm_req_msg *req_msg;
1651 int ret;
1652
1653 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1654
d4c4196f 1655 cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
a977049d
HR		 1656 if (IS_ERR(cm_id))
1657 return PTR_ERR(cm_id);
1658
1659 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1660 cm_id_priv->id.remote_id = req_msg->local_comm_id;
1661 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 1662 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 1663 &cm_id_priv->av);
1664 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1665 id.local_id);
1666 if (IS_ERR(cm_id_priv->timewait_info)) {
1667 ret = PTR_ERR(cm_id_priv->timewait_info);
76842405 1668 goto destroy;
a977049d
HR		 1669 }
1670 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
1671 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
1672 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
1673
1674 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
1675 if (!listen_cm_id_priv) {
1676 ret = -EINVAL;
76842405
SH		 1677 kfree(cm_id_priv->timewait_info);
1678 goto destroy;
a977049d
HR		 1679 }
1680
1681 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
1682 cm_id_priv->id.context = listen_cm_id_priv->id.context;
1683 cm_id_priv->id.service_id = req_msg->service_id;
9c3da099 1684 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
a977049d 1685
3971c9f6 1686 cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
a977049d 1687 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
dd5f03be
MB		 1688
1689 memcpy(work->path[0].dmac, cm_id_priv->av.ah_attr.dmac, ETH_ALEN);
1690 work->path[0].vlan_id = cm_id_priv->av.ah_attr.vlan_id;
a977049d 1691 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
76842405 1692 if (ret) {
d4c4196f 1693 ib_get_cached_gid(work->port->cm_dev->ib_device,
76842405
SH		 1694 work->port->port_num, 0, &work->path[0].sgid);
1695 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
1696 &work->path[0].sgid, sizeof work->path[0].sgid,
1697 NULL, 0);
1698 goto rejected;
1699 }
a977049d
HR		 1700 if (req_msg->alt_local_lid) {
1701 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
76842405
SH		 1702 if (ret) {
1703 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
1704 &work->path[0].sgid,
1705 sizeof work->path[0].sgid, NULL, 0);
1706 goto rejected;
1707 }
a977049d
HR		 1708 }
1709 cm_id_priv->tid = req_msg->hdr.tid;
1710 cm_id_priv->timeout_ms = cm_convert_to_ms(
1711 cm_req_get_local_resp_timeout(req_msg));
1712 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
1713 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
1714 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
1715 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
1716 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
e1444b5a 1717 cm_id_priv->pkey = req_msg->pkey;
a977049d 1718 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
a977049d
HR		 1719 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
1720 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
ae7971a7 1721 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
a977049d
HR		 1722
1723 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
1724 cm_process_work(cm_id_priv, work);
1725 cm_deref_id(listen_cm_id_priv);
1726 return 0;
1727
76842405
SH		 1728rejected:
1729 atomic_dec(&cm_id_priv->refcount);
a977049d 1730 cm_deref_id(listen_cm_id_priv);
76842405
SH		 1731destroy:
1732 ib_destroy_cm_id(cm_id);
a977049d
HR		 1733 return ret;
1734}
1735
1736static void cm_format_rep(struct cm_rep_msg *rep_msg,
1737 struct cm_id_private *cm_id_priv,
1738 struct ib_cm_rep_param *param)
1739{
1740 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
1741 rep_msg->local_comm_id = cm_id_priv->id.local_id;
1742 rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
a977049d
HR		 1743 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
1744 rep_msg->resp_resources = param->responder_resources;
1d846126
SH		 1745 cm_rep_set_target_ack_delay(rep_msg,
1746 cm_id_priv->av.port->cm_dev->ack_delay);
a977049d 1747 cm_rep_set_failover(rep_msg, param->failover_accepted);
a977049d 1748 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
e971b8cd 1749 rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
a977049d 1750
d26a360b
SH		 1751 if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
1752 rep_msg->initiator_depth = param->initiator_depth;
1753 cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
1754 cm_rep_set_srq(rep_msg, param->srq);
ef700446 1755 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
d26a360b
SH		 1756 } else {
1757 cm_rep_set_srq(rep_msg, 1);
ef700446 1758 cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num));
d26a360b
SH		 1759 }
1760
a977049d
HR		 1761 if (param->private_data && param->private_data_len)
1762 memcpy(rep_msg->private_data, param->private_data,
1763 param->private_data_len);
1764}
1765
1766int ib_send_cm_rep(struct ib_cm_id *cm_id,
1767 struct ib_cm_rep_param *param)
1768{
1769 struct cm_id_private *cm_id_priv;
1770 struct ib_mad_send_buf *msg;
1771 struct cm_rep_msg *rep_msg;
a977049d
HR		 1772 unsigned long flags;
1773 int ret;
1774
1775 if (param->private_data &&
1776 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
1777 return -EINVAL;
1778
1779 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1780 spin_lock_irqsave(&cm_id_priv->lock, flags);
1781 if (cm_id->state != IB_CM_REQ_RCVD &&
1782 cm_id->state != IB_CM_MRA_REQ_SENT) {
1783 ret = -EINVAL;
1784 goto out;
1785 }
1786
1787 ret = cm_alloc_msg(cm_id_priv, &msg);
1788 if (ret)
1789 goto out;
1790
1791 rep_msg = (struct cm_rep_msg *) msg->mad;
1792 cm_format_rep(rep_msg, cm_id_priv, param);
34816ad9 1793 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 1794 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
1795
34816ad9 1796 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1797 if (ret) {
1798 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1799 cm_free_msg(msg);
1800 return ret;
1801 }
1802
1803 cm_id->state = IB_CM_REP_SENT;
1804 cm_id_priv->msg = msg;
1805 cm_id_priv->initiator_depth = param->initiator_depth;
1806 cm_id_priv->responder_resources = param->responder_resources;
1807 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
ef700446 1808 cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
a977049d
HR		 1809
1810out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1811 return ret;
1812}
1813EXPORT_SYMBOL(ib_send_cm_rep);
1814
1815static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
1816 struct cm_id_private *cm_id_priv,
1817 const void *private_data,
1818 u8 private_data_len)
1819{
1820 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
1821 rtu_msg->local_comm_id = cm_id_priv->id.local_id;
1822 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
1823
1824 if (private_data && private_data_len)
1825 memcpy(rtu_msg->private_data, private_data, private_data_len);
1826}
1827
1828int ib_send_cm_rtu(struct ib_cm_id *cm_id,
1829 const void *private_data,
1830 u8 private_data_len)
1831{
1832 struct cm_id_private *cm_id_priv;
1833 struct ib_mad_send_buf *msg;
a977049d
HR		 1834 unsigned long flags;
1835 void *data;
1836 int ret;
1837
1838 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
1839 return -EINVAL;
1840
1841 data = cm_copy_private_data(private_data, private_data_len);
1842 if (IS_ERR(data))
1843 return PTR_ERR(data);
1844
1845 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1846 spin_lock_irqsave(&cm_id_priv->lock, flags);
1847 if (cm_id->state != IB_CM_REP_RCVD &&
1848 cm_id->state != IB_CM_MRA_REP_SENT) {
1849 ret = -EINVAL;
1850 goto error;
1851 }
1852
1853 ret = cm_alloc_msg(cm_id_priv, &msg);
1854 if (ret)
1855 goto error;
1856
1857 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1858 private_data, private_data_len);
1859
34816ad9 1860 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1861 if (ret) {
1862 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1863 cm_free_msg(msg);
1864 kfree(data);
1865 return ret;
1866 }
1867
1868 cm_id->state = IB_CM_ESTABLISHED;
1869 cm_set_private_data(cm_id_priv, data, private_data_len);
1870 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1871 return 0;
1872
1873error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1874 kfree(data);
1875 return ret;
1876}
1877EXPORT_SYMBOL(ib_send_cm_rtu);
1878
ef700446 1879static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type)
a977049d
HR		 1880{
1881 struct cm_rep_msg *rep_msg;
1882 struct ib_cm_rep_event_param *param;
1883
1884 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1885 param = &work->cm_event.param.rep_rcvd;
1886 param->remote_ca_guid = rep_msg->local_ca_guid;
1887 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
ef700446 1888 param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type));
a977049d
HR		 1889 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
1890 param->responder_resources = rep_msg->initiator_depth;
1891 param->initiator_depth = rep_msg->resp_resources;
1892 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
1893 param->failover_accepted = cm_rep_get_failover(rep_msg);
1894 param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
1895 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1896 param->srq = cm_rep_get_srq(rep_msg);
1897 work->cm_event.private_data = &rep_msg->private_data;
1898}
1899
1900static void cm_dup_rep_handler(struct cm_work *work)
1901{
1902 struct cm_id_private *cm_id_priv;
1903 struct cm_rep_msg *rep_msg;
1904 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1905 int ret;
1906
1907 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
1908 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
1909 rep_msg->local_comm_id);
1910 if (!cm_id_priv)
1911 return;
1912
9af57b7a
SH		 1913 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1914 counter[CM_REP_COUNTER]);
a977049d
HR		 1915 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1916 if (ret)
1917 goto deref;
1918
24be6e81 1919 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 1920 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
1921 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
1922 cm_id_priv->private_data,
1923 cm_id_priv->private_data_len);
1924 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
1925 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1926 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
1927 cm_id_priv->private_data,
1928 cm_id_priv->private_data_len);
1929 else
1930 goto unlock;
24be6e81 1931 spin_unlock_irq(&cm_id_priv->lock);
a977049d 1932
34816ad9 1933 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1934 if (ret)
1935 goto free;
1936 goto deref;
1937
24be6e81 1938unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1939free: cm_free_msg(msg);
1940deref: cm_deref_id(cm_id_priv);
1941}
1942
1943static int cm_rep_handler(struct cm_work *work)
1944{
1945 struct cm_id_private *cm_id_priv;
1946 struct cm_rep_msg *rep_msg;
a977049d
HR		 1947 int ret;
1948
1949 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
1950 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
1951 if (!cm_id_priv) {
1952 cm_dup_rep_handler(work);
1953 return -EINVAL;
1954 }
1955
ef700446 1956 cm_format_rep_event(work, cm_id_priv->qp_type);
87fd1a11 1957
24be6e81 1958 spin_lock_irq(&cm_id_priv->lock);
87fd1a11
SH		 1959 switch (cm_id_priv->id.state) {
1960 case IB_CM_REQ_SENT:
1961 case IB_CM_MRA_REQ_RCVD:
1962 break;
1963 default:
24be6e81 1964 spin_unlock_irq(&cm_id_priv->lock);
87fd1a11
SH		 1965 ret = -EINVAL;
1966 goto error;
1967 }
1968
a977049d
HR		 1969 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
1970 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
ef700446 1971 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
a977049d 1972
87fd1a11 1973 spin_lock(&cm.lock);
a977049d
HR		 1974 /* Check for duplicate REP. */
1975 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
87fd1a11 1976 spin_unlock(&cm.lock);
24be6e81 1977 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1978 ret = -EINVAL;
1979 goto error;
1980 }
1981 /* Check for a stale connection. */
1982 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
87fd1a11
SH		 1983 rb_erase(&cm_id_priv->timewait_info->remote_id_node,
1984 &cm.remote_id_table);
1985 cm_id_priv->timewait_info->inserted_remote_id = 0;
1986 spin_unlock(&cm.lock);
24be6e81 1987 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 1988 cm_issue_rej(work->port, work->mad_recv_wc,
1989 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
1990 NULL, 0);
1991 ret = -EINVAL;
1992 goto error;
1993 }
87fd1a11 1994 spin_unlock(&cm.lock);
a977049d 1995
a977049d
HR		 1996 cm_id_priv->id.state = IB_CM_REP_RCVD;
1997 cm_id_priv->id.remote_id = rep_msg->local_comm_id;
ef700446 1998 cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
a977049d
HR		 1999 cm_id_priv->initiator_depth = rep_msg->resp_resources;
2000 cm_id_priv->responder_resources = rep_msg->initiator_depth;
2001 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
2002 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
1d846126
SH		 2003 cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
2004 cm_id_priv->av.timeout =
2005 cm_ack_timeout(cm_id_priv->target_ack_delay,
2006 cm_id_priv->av.timeout - 1);
2007 cm_id_priv->alt_av.timeout =
2008 cm_ack_timeout(cm_id_priv->target_ack_delay,
2009 cm_id_priv->alt_av.timeout - 1);
a977049d
HR		 2010
2011 /* todo: handle peer_to_peer */
2012
34816ad9 2013 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2014 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2015 if (!ret)
2016 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2017 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2018
2019 if (ret)
2020 cm_process_work(cm_id_priv, work);
2021 else
2022 cm_deref_id(cm_id_priv);
2023 return 0;
2024
87fd1a11 2025error:
a977049d
HR		 2026 cm_deref_id(cm_id_priv);
2027 return ret;
2028}
2029
2030static int cm_establish_handler(struct cm_work *work)
2031{
2032 struct cm_id_private *cm_id_priv;
a977049d
HR		 2033 int ret;
2034
e1444b5a 2035 /* See comment in cm_establish about lookup. */
a977049d
HR		 2036 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
2037 if (!cm_id_priv)
2038 return -EINVAL;
2039
24be6e81 2040 spin_lock_irq(&cm_id_priv->lock);
a977049d 2041 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
24be6e81 2042 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2043 goto out;
2044 }
2045
34816ad9 2046 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2047 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2048 if (!ret)
2049 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2050 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2051
2052 if (ret)
2053 cm_process_work(cm_id_priv, work);
2054 else
2055 cm_deref_id(cm_id_priv);
2056 return 0;
2057out:
2058 cm_deref_id(cm_id_priv);
2059 return -EINVAL;
2060}
2061
2062static int cm_rtu_handler(struct cm_work *work)
2063{
2064 struct cm_id_private *cm_id_priv;
2065 struct cm_rtu_msg *rtu_msg;
a977049d
HR		 2066 int ret;
2067
2068 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
2069 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
2070 rtu_msg->local_comm_id);
2071 if (!cm_id_priv)
2072 return -EINVAL;
2073
2074 work->cm_event.private_data = &rtu_msg->private_data;
2075
24be6e81 2076 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2077 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
2078 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
24be6e81 2079 spin_unlock_irq(&cm_id_priv->lock);
9af57b7a
SH		 2080 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2081 counter[CM_RTU_COUNTER]);
a977049d
HR		 2082 goto out;
2083 }
2084 cm_id_priv->id.state = IB_CM_ESTABLISHED;
2085
34816ad9 2086 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2087 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2088 if (!ret)
2089 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2090 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2091
2092 if (ret)
2093 cm_process_work(cm_id_priv, work);
2094 else
2095 cm_deref_id(cm_id_priv);
2096 return 0;
2097out:
2098 cm_deref_id(cm_id_priv);
2099 return -EINVAL;
2100}
2101
2102static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
2103 struct cm_id_private *cm_id_priv,
2104 const void *private_data,
2105 u8 private_data_len)
2106{
2107 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
2108 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
2109 dreq_msg->local_comm_id = cm_id_priv->id.local_id;
2110 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
2111 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
2112
2113 if (private_data && private_data_len)
2114 memcpy(dreq_msg->private_data, private_data, private_data_len);
2115}
2116
2117int ib_send_cm_dreq(struct ib_cm_id *cm_id,
2118 const void *private_data,
2119 u8 private_data_len)
2120{
2121 struct cm_id_private *cm_id_priv;
2122 struct ib_mad_send_buf *msg;
a977049d
HR		 2123 unsigned long flags;
2124 int ret;
2125
2126 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
2127 return -EINVAL;
2128
2129 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2130 spin_lock_irqsave(&cm_id_priv->lock, flags);
2131 if (cm_id->state != IB_CM_ESTABLISHED) {
2132 ret = -EINVAL;
2133 goto out;
2134 }
2135
8d8ac865
SH		 2136 if (cm_id->lap_state == IB_CM_LAP_SENT ||
2137 cm_id->lap_state == IB_CM_MRA_LAP_RCVD)
2138 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2139
a977049d
HR		 2140 ret = cm_alloc_msg(cm_id_priv, &msg);
2141 if (ret) {
2142 cm_enter_timewait(cm_id_priv);
2143 goto out;
2144 }
2145
2146 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
2147 private_data, private_data_len);
34816ad9 2148 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2149 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
2150
34816ad9 2151 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2152 if (ret) {
2153 cm_enter_timewait(cm_id_priv);
2154 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2155 cm_free_msg(msg);
2156 return ret;
2157 }
2158
2159 cm_id->state = IB_CM_DREQ_SENT;
2160 cm_id_priv->msg = msg;
2161out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2162 return ret;
2163}
2164EXPORT_SYMBOL(ib_send_cm_dreq);
2165
2166static void cm_format_drep(struct cm_drep_msg *drep_msg,
2167 struct cm_id_private *cm_id_priv,
2168 const void *private_data,
2169 u8 private_data_len)
2170{
2171 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
2172 drep_msg->local_comm_id = cm_id_priv->id.local_id;
2173 drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
2174
2175 if (private_data && private_data_len)
2176 memcpy(drep_msg->private_data, private_data, private_data_len);
2177}
2178
2179int ib_send_cm_drep(struct ib_cm_id *cm_id,
2180 const void *private_data,
2181 u8 private_data_len)
2182{
2183 struct cm_id_private *cm_id_priv;
2184 struct ib_mad_send_buf *msg;
a977049d
HR		 2185 unsigned long flags;
2186 void *data;
2187 int ret;
2188
2189 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
2190 return -EINVAL;
2191
2192 data = cm_copy_private_data(private_data, private_data_len);
2193 if (IS_ERR(data))
2194 return PTR_ERR(data);
2195
2196 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2197 spin_lock_irqsave(&cm_id_priv->lock, flags);
2198 if (cm_id->state != IB_CM_DREQ_RCVD) {
2199 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2200 kfree(data);
2201 return -EINVAL;
2202 }
2203
2204 cm_set_private_data(cm_id_priv, data, private_data_len);
2205 cm_enter_timewait(cm_id_priv);
2206
2207 ret = cm_alloc_msg(cm_id_priv, &msg);
2208 if (ret)
2209 goto out;
2210
2211 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2212 private_data, private_data_len);
2213
34816ad9 2214 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2215 if (ret) {
2216 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2217 cm_free_msg(msg);
2218 return ret;
2219 }
2220
2221out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2222 return ret;
2223}
2224EXPORT_SYMBOL(ib_send_cm_drep);
2225
82a9c16a
SH		 2226static int cm_issue_drep(struct cm_port *port,
2227 struct ib_mad_recv_wc *mad_recv_wc)
2228{
2229 struct ib_mad_send_buf *msg = NULL;
2230 struct cm_dreq_msg *dreq_msg;
2231 struct cm_drep_msg *drep_msg;
2232 int ret;
2233
2234 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
2235 if (ret)
2236 return ret;
2237
2238 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
2239 drep_msg = (struct cm_drep_msg *) msg->mad;
2240
2241 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
2242 drep_msg->remote_comm_id = dreq_msg->local_comm_id;
2243 drep_msg->local_comm_id = dreq_msg->remote_comm_id;
2244
2245 ret = ib_post_send_mad(msg, NULL);
2246 if (ret)
2247 cm_free_msg(msg);
2248
2249 return ret;
2250}
2251
a977049d
HR		 2252static int cm_dreq_handler(struct cm_work *work)
2253{
2254 struct cm_id_private *cm_id_priv;
2255 struct cm_dreq_msg *dreq_msg;
2256 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2257 int ret;
2258
2259 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
2260 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
2261 dreq_msg->local_comm_id);
82a9c16a 2262 if (!cm_id_priv) {
9af57b7a
SH		 2263 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2264 counter[CM_DREQ_COUNTER]);
82a9c16a 2265 cm_issue_drep(work->port, work->mad_recv_wc);
a977049d 2266 return -EINVAL;
82a9c16a 2267 }
a977049d
HR		 2268
2269 work->cm_event.private_data = &dreq_msg->private_data;
2270
24be6e81 2271 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2272 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
2273 goto unlock;
2274
2275 switch (cm_id_priv->id.state) {
2276 case IB_CM_REP_SENT:
2277 case IB_CM_DREQ_SENT:
34816ad9 2278 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2279 break;
2280 case IB_CM_ESTABLISHED:
8d8ac865
SH		 2281 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
2282 cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2283 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2284 break;
a977049d
HR		 2285 case IB_CM_MRA_REP_RCVD:
2286 break;
2287 case IB_CM_TIMEWAIT:
9af57b7a
SH		 2288 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2289 counter[CM_DREQ_COUNTER]);
a977049d
HR		 2290 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2291 goto unlock;
2292
2293 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2294 cm_id_priv->private_data,
2295 cm_id_priv->private_data_len);
24be6e81 2296 spin_unlock_irq(&cm_id_priv->lock);
a977049d 2297
34816ad9 2298 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2299 cm_free_msg(msg);
2300 goto deref;
9af57b7a
SH		 2301 case IB_CM_DREQ_RCVD:
2302 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2303 counter[CM_DREQ_COUNTER]);
2304 goto unlock;
a977049d
HR		 2305 default:
2306 goto unlock;
2307 }
2308 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
2309 cm_id_priv->tid = dreq_msg->hdr.tid;
2310 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2311 if (!ret)
2312 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2313 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2314
2315 if (ret)
2316 cm_process_work(cm_id_priv, work);
2317 else
2318 cm_deref_id(cm_id_priv);
2319 return 0;
2320
24be6e81 2321unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2322deref: cm_deref_id(cm_id_priv);
2323 return -EINVAL;
2324}
2325
2326static int cm_drep_handler(struct cm_work *work)
2327{
2328 struct cm_id_private *cm_id_priv;
2329 struct cm_drep_msg *drep_msg;
a977049d
HR		 2330 int ret;
2331
2332 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
2333 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
2334 drep_msg->local_comm_id);
2335 if (!cm_id_priv)
2336 return -EINVAL;
2337
2338 work->cm_event.private_data = &drep_msg->private_data;
2339
24be6e81 2340 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2341 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2342 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
24be6e81 2343 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2344 goto out;
2345 }
2346 cm_enter_timewait(cm_id_priv);
2347
34816ad9 2348 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2349 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2350 if (!ret)
2351 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2352 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2353
2354 if (ret)
2355 cm_process_work(cm_id_priv, work);
2356 else
2357 cm_deref_id(cm_id_priv);
2358 return 0;
2359out:
2360 cm_deref_id(cm_id_priv);
2361 return -EINVAL;
2362}
2363
2364int ib_send_cm_rej(struct ib_cm_id *cm_id,
2365 enum ib_cm_rej_reason reason,
2366 void *ari,
2367 u8 ari_length,
2368 const void *private_data,
2369 u8 private_data_len)
2370{
2371 struct cm_id_private *cm_id_priv;
2372 struct ib_mad_send_buf *msg;
a977049d
HR		 2373 unsigned long flags;
2374 int ret;
2375
2376 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2377 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2378 return -EINVAL;
2379
2380 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2381
2382 spin_lock_irqsave(&cm_id_priv->lock, flags);
2383 switch (cm_id->state) {
2384 case IB_CM_REQ_SENT:
2385 case IB_CM_MRA_REQ_RCVD:
2386 case IB_CM_REQ_RCVD:
2387 case IB_CM_MRA_REQ_SENT:
2388 case IB_CM_REP_RCVD:
2389 case IB_CM_MRA_REP_SENT:
2390 ret = cm_alloc_msg(cm_id_priv, &msg);
2391 if (!ret)
2392 cm_format_rej((struct cm_rej_msg *) msg->mad,
2393 cm_id_priv, reason, ari, ari_length,
2394 private_data, private_data_len);
2395
2396 cm_reset_to_idle(cm_id_priv);
2397 break;
2398 case IB_CM_REP_SENT:
2399 case IB_CM_MRA_REP_RCVD:
2400 ret = cm_alloc_msg(cm_id_priv, &msg);
2401 if (!ret)
2402 cm_format_rej((struct cm_rej_msg *) msg->mad,
2403 cm_id_priv, reason, ari, ari_length,
2404 private_data, private_data_len);
2405
2406 cm_enter_timewait(cm_id_priv);
2407 break;
2408 default:
2409 ret = -EINVAL;
2410 goto out;
2411 }
2412
2413 if (ret)
2414 goto out;
2415
34816ad9 2416 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2417 if (ret)
2418 cm_free_msg(msg);
2419
2420out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2421 return ret;
2422}
2423EXPORT_SYMBOL(ib_send_cm_rej);
2424
2425static void cm_format_rej_event(struct cm_work *work)
2426{
2427 struct cm_rej_msg *rej_msg;
2428 struct ib_cm_rej_event_param *param;
2429
2430 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2431 param = &work->cm_event.param.rej_rcvd;
2432 param->ari = rej_msg->ari;
2433 param->ari_length = cm_rej_get_reject_info_len(rej_msg);
97f52eb4 2434 param->reason = __be16_to_cpu(rej_msg->reason);
a977049d
HR		 2435 work->cm_event.private_data = &rej_msg->private_data;
2436}
2437
2438static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2439{
2440 struct cm_timewait_info *timewait_info;
2441 struct cm_id_private *cm_id_priv;
97f52eb4 2442 __be32 remote_id;
a977049d
HR		 2443
2444 remote_id = rej_msg->local_comm_id;
2445
97f52eb4 2446 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
24be6e81 2447 spin_lock_irq(&cm.lock);
97f52eb4 2448 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
a977049d
HR		 2449 remote_id);
2450 if (!timewait_info) {
24be6e81 2451 spin_unlock_irq(&cm.lock);
a977049d
HR		 2452 return NULL;
2453 }
f06d2653
SH		 2454 cm_id_priv = idr_find(&cm.local_id_table, (__force int)
2455 (timewait_info->work.local_id ^
2456 cm.random_id_operand));
a977049d
HR		 2457 if (cm_id_priv) {
2458 if (cm_id_priv->id.remote_id == remote_id)
2459 atomic_inc(&cm_id_priv->refcount);
2460 else
2461 cm_id_priv = NULL;
2462 }
24be6e81 2463 spin_unlock_irq(&cm.lock);
a977049d
HR		 2464 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
2465 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
2466 else
2467 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
2468
2469 return cm_id_priv;
2470}
2471
2472static int cm_rej_handler(struct cm_work *work)
2473{
2474 struct cm_id_private *cm_id_priv;
2475 struct cm_rej_msg *rej_msg;
a977049d
HR		 2476 int ret;
2477
2478 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2479 cm_id_priv = cm_acquire_rejected_id(rej_msg);
2480 if (!cm_id_priv)
2481 return -EINVAL;
2482
2483 cm_format_rej_event(work);
2484
24be6e81 2485 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2486 switch (cm_id_priv->id.state) {
2487 case IB_CM_REQ_SENT:
2488 case IB_CM_MRA_REQ_RCVD:
2489 case IB_CM_REP_SENT:
2490 case IB_CM_MRA_REP_RCVD:
34816ad9 2491 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2492 /* fall through */
2493 case IB_CM_REQ_RCVD:
2494 case IB_CM_MRA_REQ_SENT:
97f52eb4 2495 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 2496 cm_enter_timewait(cm_id_priv);
2497 else
2498 cm_reset_to_idle(cm_id_priv);
2499 break;
2500 case IB_CM_DREQ_SENT:
34816ad9 2501 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2502 /* fall through */
2503 case IB_CM_REP_RCVD:
2504 case IB_CM_MRA_REP_SENT:
a977049d
HR		 2505 cm_enter_timewait(cm_id_priv);
2506 break;
8d8ac865
SH		 2507 case IB_CM_ESTABLISHED:
2508 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT ||
2509 cm_id_priv->id.lap_state == IB_CM_LAP_SENT) {
2510 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT)
2511 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
2512 cm_id_priv->msg);
2513 cm_enter_timewait(cm_id_priv);
2514 break;
2515 }
2516 /* fall through */
a977049d 2517 default:
24be6e81 2518 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2519 ret = -EINVAL;
2520 goto out;
2521 }
2522
2523 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2524 if (!ret)
2525 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2526 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2527
2528 if (ret)
2529 cm_process_work(cm_id_priv, work);
2530 else
2531 cm_deref_id(cm_id_priv);
2532 return 0;
2533out:
2534 cm_deref_id(cm_id_priv);
2535 return -EINVAL;
2536}
2537
2538int ib_send_cm_mra(struct ib_cm_id *cm_id,
2539 u8 service_timeout,
2540 const void *private_data,
2541 u8 private_data_len)
2542{
2543 struct cm_id_private *cm_id_priv;
2544 struct ib_mad_send_buf *msg;
de98b693
SH		 2545 enum ib_cm_state cm_state;
2546 enum ib_cm_lap_state lap_state;
2547 enum cm_msg_response msg_response;
a977049d
HR		 2548 void *data;
2549 unsigned long flags;
2550 int ret;
2551
2552 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
2553 return -EINVAL;
2554
2555 data = cm_copy_private_data(private_data, private_data_len);
2556 if (IS_ERR(data))
2557 return PTR_ERR(data);
2558
2559 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2560
2561 spin_lock_irqsave(&cm_id_priv->lock, flags);
2562 switch(cm_id_priv->id.state) {
2563 case IB_CM_REQ_RCVD:
de98b693
SH		 2564 cm_state = IB_CM_MRA_REQ_SENT;
2565 lap_state = cm_id->lap_state;
2566 msg_response = CM_MSG_RESPONSE_REQ;
a977049d
HR		 2567 break;
2568 case IB_CM_REP_RCVD:
de98b693
SH		 2569 cm_state = IB_CM_MRA_REP_SENT;
2570 lap_state = cm_id->lap_state;
2571 msg_response = CM_MSG_RESPONSE_REP;
a977049d
HR		 2572 break;
2573 case IB_CM_ESTABLISHED:
50a025c6
SH		 2574 if (cm_id->lap_state == IB_CM_LAP_RCVD) {
2575 cm_state = cm_id->state;
2576 lap_state = IB_CM_MRA_LAP_SENT;
2577 msg_response = CM_MSG_RESPONSE_OTHER;
2578 break;
2579 }
de98b693
SH		 2580 default:
2581 ret = -EINVAL;
2582 goto error1;
2583 }
2584
2585 if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) {
a977049d
HR		 2586 ret = cm_alloc_msg(cm_id_priv, &msg);
2587 if (ret)
2588 goto error1;
2589
2590 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
de98b693 2591 msg_response, service_timeout,
a977049d 2592 private_data, private_data_len);
34816ad9 2593 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2594 if (ret)
2595 goto error2;
a977049d 2596 }
de98b693
SH		 2597
2598 cm_id->state = cm_state;
2599 cm_id->lap_state = lap_state;
a977049d
HR		 2600 cm_id_priv->service_timeout = service_timeout;
2601 cm_set_private_data(cm_id_priv, data, private_data_len);
2602 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2603 return 0;
2604
2605error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2606 kfree(data);
2607 return ret;
2608
2609error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2610 kfree(data);
2611 cm_free_msg(msg);
2612 return ret;
2613}
2614EXPORT_SYMBOL(ib_send_cm_mra);
2615
2616static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
2617{
2618 switch (cm_mra_get_msg_mraed(mra_msg)) {
2619 case CM_MSG_RESPONSE_REQ:
2620 return cm_acquire_id(mra_msg->remote_comm_id, 0);
2621 case CM_MSG_RESPONSE_REP:
2622 case CM_MSG_RESPONSE_OTHER:
2623 return cm_acquire_id(mra_msg->remote_comm_id,
2624 mra_msg->local_comm_id);
2625 default:
2626 return NULL;
2627 }
2628}
2629
2630static int cm_mra_handler(struct cm_work *work)
2631{
2632 struct cm_id_private *cm_id_priv;
2633 struct cm_mra_msg *mra_msg;
a977049d
HR		 2634 int timeout, ret;
2635
2636 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
2637 cm_id_priv = cm_acquire_mraed_id(mra_msg);
2638 if (!cm_id_priv)
2639 return -EINVAL;
2640
2641 work->cm_event.private_data = &mra_msg->private_data;
2642 work->cm_event.param.mra_rcvd.service_timeout =
2643 cm_mra_get_service_timeout(mra_msg);
2644 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
1d846126 2645 cm_convert_to_ms(cm_id_priv->av.timeout);
a977049d 2646
24be6e81 2647 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2648 switch (cm_id_priv->id.state) {
2649 case IB_CM_REQ_SENT:
2650 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
2651 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2652 cm_id_priv->msg, timeout))
a977049d
HR		 2653 goto out;
2654 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
2655 break;
2656 case IB_CM_REP_SENT:
2657 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
2658 ib_modify_mad(cm_id_priv->av.port->mad_agent,
34816ad9 2659 cm_id_priv->msg, timeout))
a977049d
HR		 2660 goto out;
2661 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
2662 break;
2663 case IB_CM_ESTABLISHED:
2664 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
2665 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
2666 ib_modify_mad(cm_id_priv->av.port->mad_agent,
9af57b7a
SH		 2667 cm_id_priv->msg, timeout)) {
2668 if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2669 atomic_long_inc(&work->port->
2670 counter_group[CM_RECV_DUPLICATES].
2671 counter[CM_MRA_COUNTER]);
a977049d 2672 goto out;
9af57b7a 2673 }
a977049d
HR		 2674 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
2675 break;
9af57b7a
SH		 2676 case IB_CM_MRA_REQ_RCVD:
2677 case IB_CM_MRA_REP_RCVD:
2678 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2679 counter[CM_MRA_COUNTER]);
2680 /* fall through */
a977049d
HR		 2681 default:
2682 goto out;
2683 }
2684
2685 cm_id_priv->msg->context[1] = (void *) (unsigned long)
2686 cm_id_priv->id.state;
2687 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2688 if (!ret)
2689 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2690 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2691
2692 if (ret)
2693 cm_process_work(cm_id_priv, work);
2694 else
2695 cm_deref_id(cm_id_priv);
2696 return 0;
2697out:
24be6e81 2698 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2699 cm_deref_id(cm_id_priv);
2700 return -EINVAL;
2701}
2702
2703static void cm_format_lap(struct cm_lap_msg *lap_msg,
2704 struct cm_id_private *cm_id_priv,
2705 struct ib_sa_path_rec *alternate_path,
2706 const void *private_data,
2707 u8 private_data_len)
2708{
2709 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
2710 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
2711 lap_msg->local_comm_id = cm_id_priv->id.local_id;
2712 lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
2713 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
2714 /* todo: need remote CM response timeout */
2715 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
2716 lap_msg->alt_local_lid = alternate_path->slid;
2717 lap_msg->alt_remote_lid = alternate_path->dlid;
2718 lap_msg->alt_local_gid = alternate_path->sgid;
2719 lap_msg->alt_remote_gid = alternate_path->dgid;
2720 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
2721 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
2722 lap_msg->alt_hop_limit = alternate_path->hop_limit;
2723 cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
2724 cm_lap_set_sl(lap_msg, alternate_path->sl);
2725 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
2726 cm_lap_set_local_ack_timeout(lap_msg,
1d846126
SH		 2727 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
2728 alternate_path->packet_life_time));
a977049d
HR		 2729
2730 if (private_data && private_data_len)
2731 memcpy(lap_msg->private_data, private_data, private_data_len);
2732}
2733
2734int ib_send_cm_lap(struct ib_cm_id *cm_id,
2735 struct ib_sa_path_rec *alternate_path,
2736 const void *private_data,
2737 u8 private_data_len)
2738{
2739 struct cm_id_private *cm_id_priv;
2740 struct ib_mad_send_buf *msg;
a977049d
HR		 2741 unsigned long flags;
2742 int ret;
2743
2744 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
2745 return -EINVAL;
2746
2747 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2748 spin_lock_irqsave(&cm_id_priv->lock, flags);
2749 if (cm_id->state != IB_CM_ESTABLISHED ||
e1444b5a
SH		 2750 (cm_id->lap_state != IB_CM_LAP_UNINIT &&
2751 cm_id->lap_state != IB_CM_LAP_IDLE)) {
a977049d
HR		 2752 ret = -EINVAL;
2753 goto out;
2754 }
2755
e1444b5a
SH		 2756 ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av);
2757 if (ret)
2758 goto out;
1d846126
SH		 2759 cm_id_priv->alt_av.timeout =
2760 cm_ack_timeout(cm_id_priv->target_ack_delay,
2761 cm_id_priv->alt_av.timeout - 1);
e1444b5a 2762
a977049d
HR		 2763 ret = cm_alloc_msg(cm_id_priv, &msg);
2764 if (ret)
2765 goto out;
2766
2767 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
2768 alternate_path, private_data, private_data_len);
34816ad9 2769 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 2770 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
2771
34816ad9 2772 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2773 if (ret) {
2774 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2775 cm_free_msg(msg);
2776 return ret;
2777 }
2778
2779 cm_id->lap_state = IB_CM_LAP_SENT;
2780 cm_id_priv->msg = msg;
2781
2782out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2783 return ret;
2784}
2785EXPORT_SYMBOL(ib_send_cm_lap);
2786
e1444b5a
SH		 2787static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
2788 struct ib_sa_path_rec *path,
a977049d
HR		 2789 struct cm_lap_msg *lap_msg)
2790{
2791 memset(path, 0, sizeof *path);
2792 path->dgid = lap_msg->alt_local_gid;
2793 path->sgid = lap_msg->alt_remote_gid;
2794 path->dlid = lap_msg->alt_local_lid;
2795 path->slid = lap_msg->alt_remote_lid;
2796 path->flow_label = cm_lap_get_flow_label(lap_msg);
2797 path->hop_limit = lap_msg->alt_hop_limit;
2798 path->traffic_class = cm_lap_get_traffic_class(lap_msg);
2799 path->reversible = 1;
e1444b5a 2800 path->pkey = cm_id_priv->pkey;
a977049d
HR		 2801 path->sl = cm_lap_get_sl(lap_msg);
2802 path->mtu_selector = IB_SA_EQ;
e1444b5a 2803 path->mtu = cm_id_priv->path_mtu;
a977049d
HR		 2804 path->rate_selector = IB_SA_EQ;
2805 path->rate = cm_lap_get_packet_rate(lap_msg);
2806 path->packet_life_time_selector = IB_SA_EQ;
2807 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
2808 path->packet_life_time -= (path->packet_life_time > 0);
2809}
2810
2811static int cm_lap_handler(struct cm_work *work)
2812{
2813 struct cm_id_private *cm_id_priv;
2814 struct cm_lap_msg *lap_msg;
2815 struct ib_cm_lap_event_param *param;
2816 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2817 int ret;
2818
2819 /* todo: verify LAP request and send reject APR if invalid. */
2820 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
2821 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
2822 lap_msg->local_comm_id);
2823 if (!cm_id_priv)
2824 return -EINVAL;
2825
2826 param = &work->cm_event.param.lap_rcvd;
2827 param->alternate_path = &work->path[0];
e1444b5a 2828 cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
a977049d
HR		 2829 work->cm_event.private_data = &lap_msg->private_data;
2830
24be6e81 2831 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2832 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
2833 goto unlock;
2834
2835 switch (cm_id_priv->id.lap_state) {
e1444b5a 2836 case IB_CM_LAP_UNINIT:
a977049d
HR		 2837 case IB_CM_LAP_IDLE:
2838 break;
2839 case IB_CM_MRA_LAP_SENT:
9af57b7a
SH		 2840 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2841 counter[CM_LAP_COUNTER]);
a977049d
HR		 2842 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
2843 goto unlock;
2844
2845 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2846 CM_MSG_RESPONSE_OTHER,
2847 cm_id_priv->service_timeout,
2848 cm_id_priv->private_data,
2849 cm_id_priv->private_data_len);
24be6e81 2850 spin_unlock_irq(&cm_id_priv->lock);
a977049d 2851
34816ad9 2852 if (ib_post_send_mad(msg, NULL))
a977049d
HR		 2853 cm_free_msg(msg);
2854 goto deref;
9af57b7a
SH		 2855 case IB_CM_LAP_RCVD:
2856 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2857 counter[CM_LAP_COUNTER]);
2858 goto unlock;
a977049d
HR		 2859 default:
2860 goto unlock;
2861 }
2862
2863 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
2864 cm_id_priv->tid = lap_msg->hdr.tid;
e1444b5a
SH		 2865 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2866 work->mad_recv_wc->recv_buf.grh,
2867 &cm_id_priv->av);
2868 cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av);
a977049d
HR		 2869 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2870 if (!ret)
2871 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2872 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2873
2874 if (ret)
2875 cm_process_work(cm_id_priv, work);
2876 else
2877 cm_deref_id(cm_id_priv);
2878 return 0;
2879
24be6e81 2880unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2881deref: cm_deref_id(cm_id_priv);
2882 return -EINVAL;
2883}
2884
2885static void cm_format_apr(struct cm_apr_msg *apr_msg,
2886 struct cm_id_private *cm_id_priv,
2887 enum ib_cm_apr_status status,
2888 void *info,
2889 u8 info_length,
2890 const void *private_data,
2891 u8 private_data_len)
2892{
2893 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
2894 apr_msg->local_comm_id = cm_id_priv->id.local_id;
2895 apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
2896 apr_msg->ap_status = (u8) status;
2897
2898 if (info && info_length) {
2899 apr_msg->info_length = info_length;
2900 memcpy(apr_msg->info, info, info_length);
2901 }
2902
2903 if (private_data && private_data_len)
2904 memcpy(apr_msg->private_data, private_data, private_data_len);
2905}
2906
2907int ib_send_cm_apr(struct ib_cm_id *cm_id,
2908 enum ib_cm_apr_status status,
2909 void *info,
2910 u8 info_length,
2911 const void *private_data,
2912 u8 private_data_len)
2913{
2914 struct cm_id_private *cm_id_priv;
2915 struct ib_mad_send_buf *msg;
a977049d
HR		 2916 unsigned long flags;
2917 int ret;
2918
2919 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
2920 (info && info_length > IB_CM_APR_INFO_LENGTH))
2921 return -EINVAL;
2922
2923 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2924 spin_lock_irqsave(&cm_id_priv->lock, flags);
2925 if (cm_id->state != IB_CM_ESTABLISHED ||
2926 (cm_id->lap_state != IB_CM_LAP_RCVD &&
2927 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
2928 ret = -EINVAL;
2929 goto out;
2930 }
2931
2932 ret = cm_alloc_msg(cm_id_priv, &msg);
2933 if (ret)
2934 goto out;
2935
2936 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
2937 info, info_length, private_data, private_data_len);
34816ad9 2938 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2939 if (ret) {
2940 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2941 cm_free_msg(msg);
2942 return ret;
2943 }
2944
2945 cm_id->lap_state = IB_CM_LAP_IDLE;
2946out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2947 return ret;
2948}
2949EXPORT_SYMBOL(ib_send_cm_apr);
2950
2951static int cm_apr_handler(struct cm_work *work)
2952{
2953 struct cm_id_private *cm_id_priv;
2954 struct cm_apr_msg *apr_msg;
a977049d
HR		 2955 int ret;
2956
2957 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
2958 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
2959 apr_msg->local_comm_id);
2960 if (!cm_id_priv)
2961 return -EINVAL; /* Unmatched reply. */
2962
2963 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
2964 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
2965 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
2966 work->cm_event.private_data = &apr_msg->private_data;
2967
24be6e81 2968 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2969 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
2970 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
2971 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
24be6e81 2972 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2973 goto out;
2974 }
2975 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
34816ad9 2976 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
a977049d
HR		 2977 cm_id_priv->msg = NULL;
2978
2979 ret = atomic_inc_and_test(&cm_id_priv->work_count);
2980 if (!ret)
2981 list_add_tail(&work->list, &cm_id_priv->work_list);
24be6e81 2982 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2983
2984 if (ret)
2985 cm_process_work(cm_id_priv, work);
2986 else
2987 cm_deref_id(cm_id_priv);
2988 return 0;
2989out:
2990 cm_deref_id(cm_id_priv);
2991 return -EINVAL;
2992}
2993
2994static int cm_timewait_handler(struct cm_work *work)
2995{
2996 struct cm_timewait_info *timewait_info;
2997 struct cm_id_private *cm_id_priv;
a977049d
HR		 2998 int ret;
2999
3000 timewait_info = (struct cm_timewait_info *)work;
8575329d
SH		 3001 spin_lock_irq(&cm.lock);
3002 list_del(&timewait_info->list);
3003 spin_unlock_irq(&cm.lock);
a977049d
HR		 3004
3005 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
3006 timewait_info->work.remote_id);
3007 if (!cm_id_priv)
3008 return -EINVAL;
3009
8575329d 3010 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 3011 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
3012 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
8575329d 3013 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3014 goto out;
3015 }
3016 cm_id_priv->id.state = IB_CM_IDLE;
3017 ret = atomic_inc_and_test(&cm_id_priv->work_count);
3018 if (!ret)
3019 list_add_tail(&work->list, &cm_id_priv->work_list);
8575329d 3020 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3021
3022 if (ret)
3023 cm_process_work(cm_id_priv, work);
3024 else
3025 cm_deref_id(cm_id_priv);
3026 return 0;
3027out:
3028 cm_deref_id(cm_id_priv);
3029 return -EINVAL;
3030}
3031
3032static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
3033 struct cm_id_private *cm_id_priv,
3034 struct ib_cm_sidr_req_param *param)
3035{
3036 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
3037 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
3038 sidr_req_msg->request_id = cm_id_priv->id.local_id;
a88f4888 3039 sidr_req_msg->pkey = param->path->pkey;
a977049d
HR		 3040 sidr_req_msg->service_id = param->service_id;
3041
3042 if (param->private_data && param->private_data_len)
3043 memcpy(sidr_req_msg->private_data, param->private_data,
3044 param->private_data_len);
3045}
3046
3047int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
3048 struct ib_cm_sidr_req_param *param)
3049{
3050 struct cm_id_private *cm_id_priv;
3051 struct ib_mad_send_buf *msg;
a977049d
HR		 3052 unsigned long flags;
3053 int ret;
3054
3055 if (!param->path || (param->private_data &&
3056 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
3057 return -EINVAL;
3058
3059 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3060 ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
3061 if (ret)
3062 goto out;
3063
3064 cm_id->service_id = param->service_id;
9c3da099 3065 cm_id->service_mask = ~cpu_to_be64(0);
a977049d
HR		 3066 cm_id_priv->timeout_ms = param->timeout_ms;
3067 cm_id_priv->max_cm_retries = param->max_cm_retries;
3068 ret = cm_alloc_msg(cm_id_priv, &msg);
3069 if (ret)
3070 goto out;
3071
3072 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
3073 param);
34816ad9 3074 msg->timeout_ms = cm_id_priv->timeout_ms;
a977049d
HR		 3075 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
3076
3077 spin_lock_irqsave(&cm_id_priv->lock, flags);
3078 if (cm_id->state == IB_CM_IDLE)
34816ad9 3079 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 3080 else
3081 ret = -EINVAL;
3082
3083 if (ret) {
3084 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3085 cm_free_msg(msg);
3086 goto out;
3087 }
3088 cm_id->state = IB_CM_SIDR_REQ_SENT;
3089 cm_id_priv->msg = msg;
3090 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3091out:
3092 return ret;
3093}
3094EXPORT_SYMBOL(ib_send_cm_sidr_req);
3095
3096static void cm_format_sidr_req_event(struct cm_work *work,
3097 struct ib_cm_id *listen_id)
3098{
3099 struct cm_sidr_req_msg *sidr_req_msg;
3100 struct ib_cm_sidr_req_event_param *param;
3101
3102 sidr_req_msg = (struct cm_sidr_req_msg *)
3103 work->mad_recv_wc->recv_buf.mad;
3104 param = &work->cm_event.param.sidr_req_rcvd;
97f52eb4 3105 param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
a977049d 3106 param->listen_id = listen_id;
15865e7d 3107 param->service_id = sidr_req_msg->service_id;
a977049d
HR		 3108 param->port = work->port->port_num;
3109 work->cm_event.private_data = &sidr_req_msg->private_data;
3110}
3111
3112static int cm_sidr_req_handler(struct cm_work *work)
3113{
3114 struct ib_cm_id *cm_id;
3115 struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
3116 struct cm_sidr_req_msg *sidr_req_msg;
3117 struct ib_wc *wc;
a977049d 3118
d4c4196f 3119 cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
a977049d
HR		 3120 if (IS_ERR(cm_id))
3121 return PTR_ERR(cm_id);
3122 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3123
3124 /* Record SGID/SLID and request ID for lookup. */
3125 sidr_req_msg = (struct cm_sidr_req_msg *)
3126 work->mad_recv_wc->recv_buf.mad;
3127 wc = work->mad_recv_wc->wc;
97f52eb4 3128 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
a977049d
HR		 3129 cm_id_priv->av.dgid.global.interface_id = 0;
3130 cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
ca222c6b 3131 work->mad_recv_wc->recv_buf.grh,
a977049d
HR		 3132 &cm_id_priv->av);
3133 cm_id_priv->id.remote_id = sidr_req_msg->request_id;
a977049d
HR		 3134 cm_id_priv->tid = sidr_req_msg->hdr.tid;
3135 atomic_inc(&cm_id_priv->work_count);
3136
24be6e81 3137 spin_lock_irq(&cm.lock);
a977049d
HR		 3138 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
3139 if (cur_cm_id_priv) {
24be6e81 3140 spin_unlock_irq(&cm.lock);
9af57b7a
SH		 3141 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
3142 counter[CM_SIDR_REQ_COUNTER]);
a977049d
HR		 3143 goto out; /* Duplicate message. */
3144 }
29c2731c 3145 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
07d357d0 3146 cur_cm_id_priv = cm_find_listen(cm_id->device,
6e61d04f
SH		 3147 sidr_req_msg->service_id,
3148 sidr_req_msg->private_data);
a977049d 3149 if (!cur_cm_id_priv) {
24be6e81 3150 spin_unlock_irq(&cm.lock);
6164c8cd 3151 cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED);
a977049d
HR		 3152 goto out; /* No match. */
3153 }
3154 atomic_inc(&cur_cm_id_priv->refcount);
29963437 3155 atomic_inc(&cm_id_priv->refcount);
24be6e81 3156 spin_unlock_irq(&cm.lock);
a977049d
HR		 3157
3158 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
3159 cm_id_priv->id.context = cur_cm_id_priv->id.context;
3160 cm_id_priv->id.service_id = sidr_req_msg->service_id;
9c3da099 3161 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
a977049d
HR		 3162
3163 cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
3164 cm_process_work(cm_id_priv, work);
3165 cm_deref_id(cur_cm_id_priv);
3166 return 0;
3167out:
3168 ib_destroy_cm_id(&cm_id_priv->id);
3169 return -EINVAL;
3170}
3171
3172static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
3173 struct cm_id_private *cm_id_priv,
3174 struct ib_cm_sidr_rep_param *param)
3175{
3176 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
3177 cm_id_priv->tid);
3178 sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
3179 sidr_rep_msg->status = param->status;
3180 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
3181 sidr_rep_msg->service_id = cm_id_priv->id.service_id;
3182 sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
3183
3184 if (param->info && param->info_length)
3185 memcpy(sidr_rep_msg->info, param->info, param->info_length);
3186
3187 if (param->private_data && param->private_data_len)
3188 memcpy(sidr_rep_msg->private_data, param->private_data,
3189 param->private_data_len);
3190}
3191
3192int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
3193 struct ib_cm_sidr_rep_param *param)
3194{
3195 struct cm_id_private *cm_id_priv;
3196 struct ib_mad_send_buf *msg;
a977049d
HR		 3197 unsigned long flags;
3198 int ret;
3199
3200 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
3201 (param->private_data &&
3202 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
3203 return -EINVAL;
3204
3205 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3206 spin_lock_irqsave(&cm_id_priv->lock, flags);
3207 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
3208 ret = -EINVAL;
3209 goto error;
3210 }
3211
3212 ret = cm_alloc_msg(cm_id_priv, &msg);
3213 if (ret)
3214 goto error;
3215
3216 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
3217 param);
34816ad9 3218 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 3219 if (ret) {
3220 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3221 cm_free_msg(msg);
3222 return ret;
3223 }
3224 cm_id->state = IB_CM_IDLE;
3225 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3226
3227 spin_lock_irqsave(&cm.lock, flags);
3228 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
3229 spin_unlock_irqrestore(&cm.lock, flags);
3230 return 0;
3231
3232error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3233 return ret;
3234}
3235EXPORT_SYMBOL(ib_send_cm_sidr_rep);
3236
3237static void cm_format_sidr_rep_event(struct cm_work *work)
3238{
3239 struct cm_sidr_rep_msg *sidr_rep_msg;
3240 struct ib_cm_sidr_rep_event_param *param;
3241
3242 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3243 work->mad_recv_wc->recv_buf.mad;
3244 param = &work->cm_event.param.sidr_rep_rcvd;
3245 param->status = sidr_rep_msg->status;
3246 param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
3247 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
3248 param->info = &sidr_rep_msg->info;
3249 param->info_len = sidr_rep_msg->info_length;
3250 work->cm_event.private_data = &sidr_rep_msg->private_data;
3251}
3252
3253static int cm_sidr_rep_handler(struct cm_work *work)
3254{
3255 struct cm_sidr_rep_msg *sidr_rep_msg;
3256 struct cm_id_private *cm_id_priv;
a977049d
HR		 3257
3258 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3259 work->mad_recv_wc->recv_buf.mad;
3260 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
3261 if (!cm_id_priv)
3262 return -EINVAL; /* Unmatched reply. */
3263
24be6e81 3264 spin_lock_irq(&cm_id_priv->lock);
a977049d 3265 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
24be6e81 3266 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3267 goto out;
3268 }
3269 cm_id_priv->id.state = IB_CM_IDLE;
34816ad9 3270 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
24be6e81 3271 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3272
3273 cm_format_sidr_rep_event(work);
3274 cm_process_work(cm_id_priv, work);
3275 return 0;
3276out:
3277 cm_deref_id(cm_id_priv);
3278 return -EINVAL;
3279}
3280
3281static void cm_process_send_error(struct ib_mad_send_buf *msg,
3282 enum ib_wc_status wc_status)
3283{
3284 struct cm_id_private *cm_id_priv;
3285 struct ib_cm_event cm_event;
3286 enum ib_cm_state state;
a977049d
HR		 3287 int ret;
3288
3289 memset(&cm_event, 0, sizeof cm_event);
3290 cm_id_priv = msg->context[0];
3291
3292 /* Discard old sends or ones without a response. */
24be6e81 3293 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 3294 state = (enum ib_cm_state) (unsigned long) msg->context[1];
3295 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
3296 goto discard;
3297
3298 switch (state) {
3299 case IB_CM_REQ_SENT:
3300 case IB_CM_MRA_REQ_RCVD:
3301 cm_reset_to_idle(cm_id_priv);
3302 cm_event.event = IB_CM_REQ_ERROR;
3303 break;
3304 case IB_CM_REP_SENT:
3305 case IB_CM_MRA_REP_RCVD:
3306 cm_reset_to_idle(cm_id_priv);
3307 cm_event.event = IB_CM_REP_ERROR;
3308 break;
3309 case IB_CM_DREQ_SENT:
3310 cm_enter_timewait(cm_id_priv);
3311 cm_event.event = IB_CM_DREQ_ERROR;
3312 break;
3313 case IB_CM_SIDR_REQ_SENT:
3314 cm_id_priv->id.state = IB_CM_IDLE;
3315 cm_event.event = IB_CM_SIDR_REQ_ERROR;
3316 break;
3317 default:
3318 goto discard;
3319 }
24be6e81 3320 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3321 cm_event.param.send_status = wc_status;
3322
3323 /* No other events can occur on the cm_id at this point. */
3324 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
3325 cm_free_msg(msg);
3326 if (ret)
3327 ib_destroy_cm_id(&cm_id_priv->id);
3328 return;
3329discard:
24be6e81 3330 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3331 cm_free_msg(msg);
3332}
3333
3334static void cm_send_handler(struct ib_mad_agent *mad_agent,
3335 struct ib_mad_send_wc *mad_send_wc)
3336{
34816ad9 3337 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
9af57b7a
SH		 3338 struct cm_port *port;
3339 u16 attr_index;
3340
3341 port = mad_agent->context;
3342 attr_index = be16_to_cpu(((struct ib_mad_hdr *)
3343 msg->mad)->attr_id) - CM_ATTR_ID_OFFSET;
3344
3345 /*
3346 * If the send was in response to a received message (context[0] is not
3347 * set to a cm_id), and is not a REJ, then it is a send that was
3348 * manually retried.
3349 */
3350 if (!msg->context[0] && (attr_index != CM_REJ_COUNTER))
3351 msg->retries = 1;
3352
3353 atomic_long_add(1 + msg->retries,
3354 &port->counter_group[CM_XMIT].counter[attr_index]);
3355 if (msg->retries)
3356 atomic_long_add(msg->retries,
3357 &port->counter_group[CM_XMIT_RETRIES].
3358 counter[attr_index]);
a977049d
HR		 3359
3360 switch (mad_send_wc->status) {
3361 case IB_WC_SUCCESS:
3362 case IB_WC_WR_FLUSH_ERR:
3363 cm_free_msg(msg);
3364 break;
3365 default:
3366 if (msg->context[0] && msg->context[1])
3367 cm_process_send_error(msg, mad_send_wc->status);
3368 else
3369 cm_free_msg(msg);
3370 break;
3371 }
3372}
3373
c4028958 3374static void cm_work_handler(struct work_struct *_work)
a977049d 3375{
c4028958 3376 struct cm_work *work = container_of(_work, struct cm_work, work.work);
a977049d
HR		 3377 int ret;
3378
3379 switch (work->cm_event.event) {
3380 case IB_CM_REQ_RECEIVED:
3381 ret = cm_req_handler(work);
3382 break;
3383 case IB_CM_MRA_RECEIVED:
3384 ret = cm_mra_handler(work);
3385 break;
3386 case IB_CM_REJ_RECEIVED:
3387 ret = cm_rej_handler(work);
3388 break;
3389 case IB_CM_REP_RECEIVED:
3390 ret = cm_rep_handler(work);
3391 break;
3392 case IB_CM_RTU_RECEIVED:
3393 ret = cm_rtu_handler(work);
3394 break;
3395 case IB_CM_USER_ESTABLISHED:
3396 ret = cm_establish_handler(work);
3397 break;
3398 case IB_CM_DREQ_RECEIVED:
3399 ret = cm_dreq_handler(work);
3400 break;
3401 case IB_CM_DREP_RECEIVED:
3402 ret = cm_drep_handler(work);
3403 break;
3404 case IB_CM_SIDR_REQ_RECEIVED:
3405 ret = cm_sidr_req_handler(work);
3406 break;
3407 case IB_CM_SIDR_REP_RECEIVED:
3408 ret = cm_sidr_rep_handler(work);
3409 break;
3410 case IB_CM_LAP_RECEIVED:
3411 ret = cm_lap_handler(work);
3412 break;
3413 case IB_CM_APR_RECEIVED:
3414 ret = cm_apr_handler(work);
3415 break;
3416 case IB_CM_TIMEWAIT_EXIT:
3417 ret = cm_timewait_handler(work);
3418 break;
3419 default:
3420 ret = -EINVAL;
3421 break;
3422 }
3423 if (ret)
3424 cm_free_work(work);
3425}
3426
e1444b5a 3427static int cm_establish(struct ib_cm_id *cm_id)
a977049d
HR		 3428{
3429 struct cm_id_private *cm_id_priv;
3430 struct cm_work *work;
3431 unsigned long flags;
3432 int ret = 0;
be4b4993
ES		 3433 struct cm_device *cm_dev;
3434
3435 cm_dev = ib_get_client_data(cm_id->device, &cm_client);
3436 if (!cm_dev)
3437 return -ENODEV;
a977049d
HR		 3438
3439 work = kmalloc(sizeof *work, GFP_ATOMIC);
3440 if (!work)
3441 return -ENOMEM;
3442
3443 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3444 spin_lock_irqsave(&cm_id_priv->lock, flags);
3445 switch (cm_id->state)
3446 {
3447 case IB_CM_REP_SENT:
3448 case IB_CM_MRA_REP_RCVD:
3449 cm_id->state = IB_CM_ESTABLISHED;
3450 break;
3451 case IB_CM_ESTABLISHED:
3452 ret = -EISCONN;
3453 break;
3454 default:
3455 ret = -EINVAL;
3456 break;
3457 }
3458 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3459
3460 if (ret) {
3461 kfree(work);
3462 goto out;
3463 }
3464
3465 /*
3466 * The CM worker thread may try to destroy the cm_id before it
3467 * can execute this work item. To prevent potential deadlock,
3468 * we need to find the cm_id once we're in the context of the
3469 * worker thread, rather than holding a reference on it.
3470 */
c4028958 3471 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 3472 work->local_id = cm_id->local_id;
3473 work->remote_id = cm_id->remote_id;
3474 work->mad_recv_wc = NULL;
3475 work->cm_event.event = IB_CM_USER_ESTABLISHED;
be4b4993
ES		 3476
3477 /* Check if the device started its remove_one */
3478 spin_lock_irq(&cm.lock);
3479 if (!cm_dev->going_down) {
3480 queue_delayed_work(cm.wq, &work->work, 0);
3481 } else {
3482 kfree(work);
3483 ret = -ENODEV;
3484 }
3485 spin_unlock_irq(&cm.lock);
3486
a977049d
HR		 3487out:
3488 return ret;
3489}
e1444b5a
SH		 3490
3491static int cm_migrate(struct ib_cm_id *cm_id)
3492{
3493 struct cm_id_private *cm_id_priv;
3494 unsigned long flags;
3495 int ret = 0;
3496
3497 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3498 spin_lock_irqsave(&cm_id_priv->lock, flags);
3499 if (cm_id->state == IB_CM_ESTABLISHED &&
3500 (cm_id->lap_state == IB_CM_LAP_UNINIT ||
3501 cm_id->lap_state == IB_CM_LAP_IDLE)) {
3502 cm_id->lap_state = IB_CM_LAP_IDLE;
3503 cm_id_priv->av = cm_id_priv->alt_av;
3504 } else
3505 ret = -EINVAL;
3506 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3507
3508 return ret;
3509}
3510
3511int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
3512{
3513 int ret;
3514
3515 switch (event) {
3516 case IB_EVENT_COMM_EST:
3517 ret = cm_establish(cm_id);
3518 break;
3519 case IB_EVENT_PATH_MIG:
3520 ret = cm_migrate(cm_id);
3521 break;
3522 default:
3523 ret = -EINVAL;
3524 }
3525 return ret;
3526}
3527EXPORT_SYMBOL(ib_cm_notify);
a977049d
HR		 3528
3529static void cm_recv_handler(struct ib_mad_agent *mad_agent,
3530 struct ib_mad_recv_wc *mad_recv_wc)
3531{
9af57b7a 3532 struct cm_port *port = mad_agent->context;
a977049d
HR		 3533 struct cm_work *work;
3534 enum ib_cm_event_type event;
9af57b7a 3535 u16 attr_id;
a977049d 3536 int paths = 0;
be4b4993 3537 int going_down = 0;
a977049d
HR		 3538
3539 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3540 case CM_REQ_ATTR_ID:
3541 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
3542 alt_local_lid != 0);
3543 event = IB_CM_REQ_RECEIVED;
3544 break;
3545 case CM_MRA_ATTR_ID:
3546 event = IB_CM_MRA_RECEIVED;
3547 break;
3548 case CM_REJ_ATTR_ID:
3549 event = IB_CM_REJ_RECEIVED;
3550 break;
3551 case CM_REP_ATTR_ID:
3552 event = IB_CM_REP_RECEIVED;
3553 break;
3554 case CM_RTU_ATTR_ID:
3555 event = IB_CM_RTU_RECEIVED;
3556 break;
3557 case CM_DREQ_ATTR_ID:
3558 event = IB_CM_DREQ_RECEIVED;
3559 break;
3560 case CM_DREP_ATTR_ID:
3561 event = IB_CM_DREP_RECEIVED;
3562 break;
3563 case CM_SIDR_REQ_ATTR_ID:
3564 event = IB_CM_SIDR_REQ_RECEIVED;
3565 break;
3566 case CM_SIDR_REP_ATTR_ID:
3567 event = IB_CM_SIDR_REP_RECEIVED;
3568 break;
3569 case CM_LAP_ATTR_ID:
3570 paths = 1;
3571 event = IB_CM_LAP_RECEIVED;
3572 break;
3573 case CM_APR_ATTR_ID:
3574 event = IB_CM_APR_RECEIVED;
3575 break;
3576 default:
3577 ib_free_recv_mad(mad_recv_wc);
3578 return;
3579 }
3580
9af57b7a
SH		 3581 attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id);
3582 atomic_long_inc(&port->counter_group[CM_RECV].
3583 counter[attr_id - CM_ATTR_ID_OFFSET]);
3584
a977049d
HR		 3585 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
3586 GFP_KERNEL);
3587 if (!work) {
3588 ib_free_recv_mad(mad_recv_wc);
3589 return;
3590 }
3591
c4028958 3592 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 3593 work->cm_event.event = event;
3594 work->mad_recv_wc = mad_recv_wc;
9af57b7a 3595 work->port = port;
be4b4993
ES		 3596
3597 /* Check if the device started its remove_one */
3598 spin_lock_irq(&cm.lock);
3599 if (!port->cm_dev->going_down)
3600 queue_delayed_work(cm.wq, &work->work, 0);
3601 else
3602 going_down = 1;
3603 spin_unlock_irq(&cm.lock);
3604
3605 if (going_down) {
3606 kfree(work);
3607 ib_free_recv_mad(mad_recv_wc);
3608 }
a977049d
HR		 3609}
3610
3611static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
3612 struct ib_qp_attr *qp_attr,
3613 int *qp_attr_mask)
3614{
3615 unsigned long flags;
3616 int ret;
3617
3618 spin_lock_irqsave(&cm_id_priv->lock, flags);
3619 switch (cm_id_priv->id.state) {
3620 case IB_CM_REQ_SENT:
3621 case IB_CM_MRA_REQ_RCVD:
3622 case IB_CM_REQ_RCVD:
3623 case IB_CM_MRA_REQ_SENT:
3624 case IB_CM_REP_RCVD:
3625 case IB_CM_MRA_REP_SENT:
3626 case IB_CM_REP_SENT:
3627 case IB_CM_MRA_REP_RCVD:
3628 case IB_CM_ESTABLISHED:
3629 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
3630 IB_QP_PKEY_INDEX | IB_QP_PORT;
e31353ea 3631 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
a977049d 3632 if (cm_id_priv->responder_resources)
c1f250c0
SH		 3633 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
3634 IB_ACCESS_REMOTE_ATOMIC;
a977049d
HR		 3635 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
3636 qp_attr->port_num = cm_id_priv->av.port->port_num;
3637 ret = 0;
3638 break;
3639 default:
3640 ret = -EINVAL;
3641 break;
3642 }
3643 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3644 return ret;
3645}
3646
3647static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
3648 struct ib_qp_attr *qp_attr,
3649 int *qp_attr_mask)
3650{
3651 unsigned long flags;
3652 int ret;
3653
3654 spin_lock_irqsave(&cm_id_priv->lock, flags);
3655 switch (cm_id_priv->id.state) {
3656 case IB_CM_REQ_RCVD:
3657 case IB_CM_MRA_REQ_SENT:
3658 case IB_CM_REP_RCVD:
3659 case IB_CM_MRA_REP_SENT:
3660 case IB_CM_REP_SENT:
3661 case IB_CM_MRA_REP_RCVD:
3662 case IB_CM_ESTABLISHED:
3663 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 3664 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d 3665 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
990acea6
WY		 3666 if (!cm_id_priv->av.valid) {
3667 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
dd5f03be 3668 return -EINVAL;
990acea6 3669 }
dd5f03be
MB		 3670 if (cm_id_priv->av.ah_attr.vlan_id != 0xffff) {
3671 qp_attr->vlan_id = cm_id_priv->av.ah_attr.vlan_id;
3672 *qp_attr_mask |= IB_QP_VID;
3673 }
3674 if (!is_zero_ether_addr(cm_id_priv->av.smac)) {
3675 memcpy(qp_attr->smac, cm_id_priv->av.smac,
3676 sizeof(qp_attr->smac));
3677 *qp_attr_mask |= IB_QP_SMAC;
3678 }
3679 if (cm_id_priv->alt_av.valid) {
3680 if (cm_id_priv->alt_av.ah_attr.vlan_id != 0xffff) {
3681 qp_attr->alt_vlan_id =
3682 cm_id_priv->alt_av.ah_attr.vlan_id;
3683 *qp_attr_mask |= IB_QP_ALT_VID;
3684 }
3685 if (!is_zero_ether_addr(cm_id_priv->alt_av.smac)) {
3686 memcpy(qp_attr->alt_smac,
3687 cm_id_priv->alt_av.smac,
3688 sizeof(qp_attr->alt_smac));
3689 *qp_attr_mask |= IB_QP_ALT_SMAC;
3690 }
3691 }
a977049d
HR		 3692 qp_attr->path_mtu = cm_id_priv->path_mtu;
3693 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
3694 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
d26a360b
SH		 3695 if (cm_id_priv->qp_type == IB_QPT_RC ||
3696 cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
ae7971a7
SH		 3697 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
3698 IB_QP_MIN_RNR_TIMER;
3699 qp_attr->max_dest_rd_atomic =
3700 cm_id_priv->responder_resources;
3701 qp_attr->min_rnr_timer = 0;
3702 }
a977049d
HR		 3703 if (cm_id_priv->alt_av.ah_attr.dlid) {
3704 *qp_attr_mask |= IB_QP_ALT_PATH;
0d8fdfd7 3705 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
e1444b5a 3706 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
1d846126 3707 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
a977049d
HR		 3708 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
3709 }
3710 ret = 0;
3711 break;
3712 default:
3713 ret = -EINVAL;
3714 break;
3715 }
3716 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3717 return ret;
3718}
3719
3720static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
3721 struct ib_qp_attr *qp_attr,
3722 int *qp_attr_mask)
3723{
3724 unsigned long flags;
3725 int ret;
3726
3727 spin_lock_irqsave(&cm_id_priv->lock, flags);
3728 switch (cm_id_priv->id.state) {
0fe313b0
SH		 3729 /* Allow transition to RTS before sending REP */
3730 case IB_CM_REQ_RCVD:
3731 case IB_CM_MRA_REQ_SENT:
3732
a977049d
HR		 3733 case IB_CM_REP_RCVD:
3734 case IB_CM_MRA_REP_SENT:
3735 case IB_CM_REP_SENT:
3736 case IB_CM_MRA_REP_RCVD:
3737 case IB_CM_ESTABLISHED:
e1444b5a
SH		 3738 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
3739 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
3740 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
d26a360b
SH		 3741 switch (cm_id_priv->qp_type) {
3742 case IB_QPT_RC:
3743 case IB_QPT_XRC_INI:
3744 *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY |
e1444b5a 3745 IB_QP_MAX_QP_RD_ATOMIC;
e1444b5a
SH		 3746 qp_attr->retry_cnt = cm_id_priv->retry_count;
3747 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
d26a360b
SH		 3748 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
3749 /* fall through */
3750 case IB_QPT_XRC_TGT:
3751 *qp_attr_mask |= IB_QP_TIMEOUT;
3752 qp_attr->timeout = cm_id_priv->av.timeout;
3753 break;
3754 default:
3755 break;
e1444b5a
SH		 3756 }
3757 if (cm_id_priv->alt_av.ah_attr.dlid) {
3758 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
3759 qp_attr->path_mig_state = IB_MIG_REARM;
3760 }
3761 } else {
3762 *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
3763 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
3764 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
1d846126 3765 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
e1444b5a 3766 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
a977049d
HR		 3767 qp_attr->path_mig_state = IB_MIG_REARM;
3768 }
3769 ret = 0;
3770 break;
3771 default:
3772 ret = -EINVAL;
3773 break;
3774 }
3775 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3776 return ret;
3777}
3778
3779int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
3780 struct ib_qp_attr *qp_attr,
3781 int *qp_attr_mask)
3782{
3783 struct cm_id_private *cm_id_priv;
3784 int ret;
3785
3786 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3787 switch (qp_attr->qp_state) {
3788 case IB_QPS_INIT:
3789 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
3790 break;
3791 case IB_QPS_RTR:
3792 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
3793 break;
3794 case IB_QPS_RTS:
3795 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
3796 break;
3797 default:
3798 ret = -EINVAL;
3799 break;
3800 }
3801 return ret;
3802}
3803EXPORT_SYMBOL(ib_cm_init_qp_attr);
3804
454a01e7 3805static void cm_get_ack_delay(struct cm_device *cm_dev)
1d846126
SH		 3806{
3807 struct ib_device_attr attr;
3808
d4c4196f 3809 if (ib_query_device(cm_dev->ib_device, &attr))
1d846126
SH		 3810 cm_dev->ack_delay = 0; /* acks will rely on packet life time */
3811 else
3812 cm_dev->ack_delay = attr.local_ca_ack_delay;
3813}
3814
9af57b7a
SH		 3815static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr,
3816 char *buf)
3817{
3818 struct cm_counter_group *group;
3819 struct cm_counter_attribute *cm_attr;
3820
3821 group = container_of(obj, struct cm_counter_group, obj);
3822 cm_attr = container_of(attr, struct cm_counter_attribute, attr);
3823
3824 return sprintf(buf, "%ld\n",
3825 atomic_long_read(&group->counter[cm_attr->index]));
3826}
3827
52cf25d0 3828static const struct sysfs_ops cm_counter_ops = {
9af57b7a
SH		 3829 .show = cm_show_counter
3830};
3831
3832static struct kobj_type cm_counter_obj_type = {
3833 .sysfs_ops = &cm_counter_ops,
3834 .default_attrs = cm_counter_default_attrs
3835};
3836
3837static void cm_release_port_obj(struct kobject *obj)
3838{
3839 struct cm_port *cm_port;
3840
9af57b7a
SH		 3841 cm_port = container_of(obj, struct cm_port, port_obj);
3842 kfree(cm_port);
3843}
3844
3845static struct kobj_type cm_port_obj_type = {
3846 .release = cm_release_port_obj
3847};
3848
2c9ede55 3849static char *cm_devnode(struct device *dev, umode_t *mode)
c3af0980 3850{
b2bc4782
GR		 3851 if (mode)
3852 *mode = 0666;
c3af0980
RD		 3853 return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
3854}
3855
9af57b7a 3856struct class cm_class = {
c3af0980 3857 .owner = THIS_MODULE,
9af57b7a 3858 .name = "infiniband_cm",
c3af0980 3859 .devnode = cm_devnode,
9af57b7a
SH		 3860};
3861EXPORT_SYMBOL(cm_class);
3862
9af57b7a
SH		 3863static int cm_create_port_fs(struct cm_port *port)
3864{
3865 int i, ret;
3866
3867 ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type,
110cf374 3868 &port->cm_dev->device->kobj,
9af57b7a
SH		 3869 "%d", port->port_num);
3870 if (ret) {
3871 kfree(port);
3872 return ret;
3873 }
3874
3875 for (i = 0; i < CM_COUNTER_GROUPS; i++) {
3876 ret = kobject_init_and_add(&port->counter_group[i].obj,
3877 &cm_counter_obj_type,
7c7a9bcc 3878 &port->port_obj,
9af57b7a
SH		 3879 "%s", counter_group_names[i]);
3880 if (ret)
3881 goto error;
3882 }
3883
3884 return 0;
3885
3886error:
3887 while (i--)
7c7a9bcc
RD		 3888 kobject_put(&port->counter_group[i].obj);
3889 kobject_put(&port->port_obj);
9af57b7a
SH		 3890 return ret;
3891
3892}
3893
3894static void cm_remove_port_fs(struct cm_port *port)
3895{
3896 int i;
3897
3898 for (i = 0; i < CM_COUNTER_GROUPS; i++)
7c7a9bcc 3899 kobject_put(&port->counter_group[i].obj);
9af57b7a 3900
7c7a9bcc 3901 kobject_put(&port->port_obj);
9af57b7a
SH		 3902}
3903
d4c4196f 3904static void cm_add_one(struct ib_device *ib_device)
a977049d
HR		 3905{
3906 struct cm_device *cm_dev;
3907 struct cm_port *port;
3908 struct ib_mad_reg_req reg_req = {
3909 .mgmt_class = IB_MGMT_CLASS_CM,
0f29b46d 3910 .mgmt_class_version = IB_CM_CLASS_VERSION,
a977049d
HR		 3911 };
3912 struct ib_port_modify port_modify = {
3913 .set_port_cap_mask = IB_PORT_CM_SUP
3914 };
3915 unsigned long flags;
3916 int ret;
091e6a4c 3917 int count = 0;
a977049d
HR		 3918 u8 i;
3919
9af57b7a 3920 cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) *
d4c4196f 3921 ib_device->phys_port_cnt, GFP_KERNEL);
a977049d
HR		 3922 if (!cm_dev)
3923 return;
3924
d4c4196f 3925 cm_dev->ib_device = ib_device;
1d846126 3926 cm_get_ack_delay(cm_dev);
be4b4993 3927 cm_dev->going_down = 0;
91bd418f
GKH		 3928 cm_dev->device = device_create(&cm_class, &ib_device->dev,
3929 MKDEV(0, 0), NULL,
3930 "%s", ib_device->name);
3e340c05 3931 if (IS_ERR(cm_dev->device)) {
9af57b7a
SH		 3932 kfree(cm_dev);
3933 return;
3934 }
3935
a977049d 3936 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
d4c4196f 3937 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
72219cea 3938 if (!rdma_cap_ib_cm(ib_device, i))
091e6a4c
MW		 3939 continue;
3940
9af57b7a
SH		 3941 port = kzalloc(sizeof *port, GFP_KERNEL);
3942 if (!port)
3943 goto error1;
3944
3945 cm_dev->port[i-1] = port;
a977049d
HR		 3946 port->cm_dev = cm_dev;
3947 port->port_num = i;
9af57b7a
SH		 3948
3949 ret = cm_create_port_fs(port);
3950 if (ret)
3951 goto error1;
3952
d4c4196f 3953 port->mad_agent = ib_register_mad_agent(ib_device, i,
a977049d
HR		 3954 IB_QPT_GSI,
3955 &reg_req,
3956 0,
3957 cm_send_handler,
3958 cm_recv_handler,
0f29b46d
IW		 3959 port,
3960 0);
a977049d 3961 if (IS_ERR(port->mad_agent))
9af57b7a 3962 goto error2;
a977049d 3963
d4c4196f 3964 ret = ib_modify_port(ib_device, i, 0, &port_modify);
a977049d 3965 if (ret)
9af57b7a 3966 goto error3;
091e6a4c
MW		 3967
3968 count++;
a977049d 3969 }
091e6a4c
MW		 3970
3971 if (!count)
3972 goto free;
3973
d4c4196f 3974 ib_set_client_data(ib_device, &cm_client, cm_dev);
a977049d
HR		 3975
3976 write_lock_irqsave(&cm.device_lock, flags);
3977 list_add_tail(&cm_dev->list, &cm.device_list);
3978 write_unlock_irqrestore(&cm.device_lock, flags);
3979 return;
3980
9af57b7a 3981error3:
cf311cd4 3982 ib_unregister_mad_agent(port->mad_agent);
9af57b7a
SH		 3983error2:
3984 cm_remove_port_fs(port);
cf311cd4 3985error1:
a977049d
HR		 3986 port_modify.set_port_cap_mask = 0;
3987 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
3988 while (--i) {
72219cea 3989 if (!rdma_cap_ib_cm(ib_device, i))
091e6a4c
MW		 3990 continue;
3991
9af57b7a 3992 port = cm_dev->port[i-1];
d4c4196f 3993 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
a977049d 3994 ib_unregister_mad_agent(port->mad_agent);
9af57b7a 3995 cm_remove_port_fs(port);
a977049d 3996 }
091e6a4c 3997free:
110cf374 3998 device_unregister(cm_dev->device);
a7e80ce2 3999 kfree(cm_dev);
a977049d
HR		 4000}
4001
7c1eb45a 4002static void cm_remove_one(struct ib_device *ib_device, void *client_data)
a977049d 4003{
7c1eb45a 4004 struct cm_device *cm_dev = client_data;
a977049d
HR		 4005 struct cm_port *port;
4006 struct ib_port_modify port_modify = {
4007 .clr_port_cap_mask = IB_PORT_CM_SUP
4008 };
4009 unsigned long flags;
4010 int i;
4011
a977049d
HR		 4012 if (!cm_dev)
4013 return;
4014
4015 write_lock_irqsave(&cm.device_lock, flags);
4016 list_del(&cm_dev->list);
4017 write_unlock_irqrestore(&cm.device_lock, flags);
4018
be4b4993
ES		 4019 spin_lock_irq(&cm.lock);
4020 cm_dev->going_down = 1;
4021 spin_unlock_irq(&cm.lock);
4022
d4c4196f 4023 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
72219cea 4024 if (!rdma_cap_ib_cm(ib_device, i))
091e6a4c
MW		 4025 continue;
4026
9af57b7a 4027 port = cm_dev->port[i-1];
d4c4196f 4028 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
be4b4993
ES		 4029 /*
4030 * We flush the queue here after the going_down set, this
4031 * verify that no new works will be queued in the recv handler,
4032 * after that we can call the unregister_mad_agent
4033 */
84ba284c 4034 flush_workqueue(cm.wq);
be4b4993 4035 ib_unregister_mad_agent(port->mad_agent);
9af57b7a 4036 cm_remove_port_fs(port);
a977049d 4037 }
110cf374 4038 device_unregister(cm_dev->device);
a7e80ce2 4039 kfree(cm_dev);
a977049d
HR		 4040}
4041
4042static int __init ib_cm_init(void)
4043{
4044 int ret;
4045
4046 memset(&cm, 0, sizeof cm);
4047 INIT_LIST_HEAD(&cm.device_list);
4048 rwlock_init(&cm.device_lock);
4049 spin_lock_init(&cm.lock);
4050 cm.listen_service_table = RB_ROOT;
9c3da099 4051 cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
a977049d
HR		 4052 cm.remote_id_table = RB_ROOT;
4053 cm.remote_qp_table = RB_ROOT;
4054 cm.remote_sidr_table = RB_ROOT;
4055 idr_init(&cm.local_id_table);
f06d2653 4056 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
8575329d 4057 INIT_LIST_HEAD(&cm.timewait_list);
a977049d 4058
9af57b7a 4059 ret = class_register(&cm_class);
87d4abda
DB		 4060 if (ret) {
4061 ret = -ENOMEM;
4062 goto error1;
4063 }
a977049d 4064
9af57b7a
SH		 4065 cm.wq = create_workqueue("ib_cm");
4066 if (!cm.wq) {
4067 ret = -ENOMEM;
87d4abda 4068 goto error2;
9af57b7a
SH		 4069 }
4070
a977049d
HR		 4071 ret = ib_register_client(&cm_client);
4072 if (ret)
87d4abda 4073 goto error3;
a977049d
HR		 4074
4075 return 0;
87d4abda 4076error3:
a977049d 4077 destroy_workqueue(cm.wq);
87d4abda 4078error2:
9af57b7a 4079 class_unregister(&cm_class);
87d4abda
DB		 4080error1:
4081 idr_destroy(&cm.local_id_table);
a977049d
HR		 4082 return ret;
4083}
4084
4085static void __exit ib_cm_cleanup(void)
4086{
8575329d
SH		 4087 struct cm_timewait_info *timewait_info, *tmp;
4088
4089 spin_lock_irq(&cm.lock);
4090 list_for_each_entry(timewait_info, &cm.timewait_list, list)
4091 cancel_delayed_work(&timewait_info->work.work);
4092 spin_unlock_irq(&cm.lock);
4093
84ba284c 4094 ib_unregister_client(&cm_client);
a977049d 4095 destroy_workqueue(cm.wq);
8575329d
SH		 4096
4097 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
4098 list_del(&timewait_info->list);
4099 kfree(timewait_info);
4100 }
4101
9af57b7a 4102 class_unregister(&cm_class);
5d7edb3c 4103 idr_destroy(&cm.local_id_table);
a977049d
HR		 4104}
4105
4106module_init(ib_cm_init);
4107module_exit(ib_cm_cleanup);
4108
Linux kernel - Deliverables
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