Commit | Line | Data |
---|---|---|
a977049d HR |
1 | /* |
2 | * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. | |
3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. | |
4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. | |
5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
6 | * | |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
34 | * | |
35 | * $Id: cm.c 2821 2005-07-08 17:07:28Z sean.hefty $ | |
36 | */ | |
37 | #include <linux/dma-mapping.h> | |
38 | #include <linux/err.h> | |
39 | #include <linux/idr.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/pci.h> | |
42 | #include <linux/rbtree.h> | |
43 | #include <linux/spinlock.h> | |
44 | #include <linux/workqueue.h> | |
45 | ||
a4d61e84 RD |
46 | #include <rdma/ib_cache.h> |
47 | #include <rdma/ib_cm.h> | |
a977049d HR |
48 | #include "cm_msgs.h" |
49 | ||
50 | MODULE_AUTHOR("Sean Hefty"); | |
51 | MODULE_DESCRIPTION("InfiniBand CM"); | |
52 | MODULE_LICENSE("Dual BSD/GPL"); | |
53 | ||
54 | static void cm_add_one(struct ib_device *device); | |
55 | static void cm_remove_one(struct ib_device *device); | |
56 | ||
57 | static struct ib_client cm_client = { | |
58 | .name = "cm", | |
59 | .add = cm_add_one, | |
60 | .remove = cm_remove_one | |
61 | }; | |
62 | ||
63 | static struct ib_cm { | |
64 | spinlock_t lock; | |
65 | struct list_head device_list; | |
66 | rwlock_t device_lock; | |
67 | struct rb_root listen_service_table; | |
68 | u64 listen_service_id; | |
69 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
70 | struct rb_root remote_qp_table; | |
71 | struct rb_root remote_id_table; | |
72 | struct rb_root remote_sidr_table; | |
73 | struct idr local_id_table; | |
74 | struct workqueue_struct *wq; | |
75 | } cm; | |
76 | ||
77 | struct cm_port { | |
78 | struct cm_device *cm_dev; | |
79 | struct ib_mad_agent *mad_agent; | |
80 | u8 port_num; | |
81 | }; | |
82 | ||
83 | struct cm_device { | |
84 | struct list_head list; | |
85 | struct ib_device *device; | |
97f52eb4 | 86 | __be64 ca_guid; |
a977049d HR |
87 | struct cm_port port[0]; |
88 | }; | |
89 | ||
90 | struct cm_av { | |
91 | struct cm_port *port; | |
92 | union ib_gid dgid; | |
93 | struct ib_ah_attr ah_attr; | |
94 | u16 pkey_index; | |
95 | u8 packet_life_time; | |
96 | }; | |
97 | ||
98 | struct cm_work { | |
99 | struct work_struct work; | |
100 | struct list_head list; | |
101 | struct cm_port *port; | |
102 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
103 | __be32 local_id; /* Established / timewait */ |
104 | __be32 remote_id; | |
a977049d HR |
105 | struct ib_cm_event cm_event; |
106 | struct ib_sa_path_rec path[0]; | |
107 | }; | |
108 | ||
109 | struct cm_timewait_info { | |
110 | struct cm_work work; /* Must be first. */ | |
111 | struct rb_node remote_qp_node; | |
112 | struct rb_node remote_id_node; | |
97f52eb4 SH |
113 | __be64 remote_ca_guid; |
114 | __be32 remote_qpn; | |
a977049d HR |
115 | u8 inserted_remote_qp; |
116 | u8 inserted_remote_id; | |
117 | }; | |
118 | ||
119 | struct cm_id_private { | |
120 | struct ib_cm_id id; | |
121 | ||
122 | struct rb_node service_node; | |
123 | struct rb_node sidr_id_node; | |
87fd1a11 | 124 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
a977049d HR |
125 | wait_queue_head_t wait; |
126 | atomic_t refcount; | |
127 | ||
128 | struct ib_mad_send_buf *msg; | |
129 | struct cm_timewait_info *timewait_info; | |
130 | /* todo: use alternate port on send failure */ | |
131 | struct cm_av av; | |
132 | struct cm_av alt_av; | |
133 | ||
134 | void *private_data; | |
97f52eb4 SH |
135 | __be64 tid; |
136 | __be32 local_qpn; | |
137 | __be32 remote_qpn; | |
ae7971a7 | 138 | enum ib_qp_type qp_type; |
97f52eb4 SH |
139 | __be32 sq_psn; |
140 | __be32 rq_psn; | |
a977049d HR |
141 | int timeout_ms; |
142 | enum ib_mtu path_mtu; | |
143 | u8 private_data_len; | |
144 | u8 max_cm_retries; | |
145 | u8 peer_to_peer; | |
146 | u8 responder_resources; | |
147 | u8 initiator_depth; | |
148 | u8 local_ack_timeout; | |
149 | u8 retry_count; | |
150 | u8 rnr_retry_count; | |
151 | u8 service_timeout; | |
152 | ||
153 | struct list_head work_list; | |
154 | atomic_t work_count; | |
155 | }; | |
156 | ||
157 | static void cm_work_handler(void *data); | |
158 | ||
159 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
160 | { | |
161 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
162 | wake_up(&cm_id_priv->wait); | |
163 | } | |
164 | ||
165 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
166 | struct ib_mad_send_buf **msg) | |
167 | { | |
168 | struct ib_mad_agent *mad_agent; | |
169 | struct ib_mad_send_buf *m; | |
170 | struct ib_ah *ah; | |
171 | ||
172 | mad_agent = cm_id_priv->av.port->mad_agent; | |
173 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
174 | if (IS_ERR(ah)) | |
175 | return PTR_ERR(ah); | |
176 | ||
354ba39c JK |
177 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
178 | cm_id_priv->av.pkey_index, | |
34816ad9 | 179 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
180 | GFP_ATOMIC); |
181 | if (IS_ERR(m)) { | |
182 | ib_destroy_ah(ah); | |
183 | return PTR_ERR(m); | |
184 | } | |
185 | ||
186 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
187 | m->ah = ah; |
188 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
189 | |
190 | atomic_inc(&cm_id_priv->refcount); | |
191 | m->context[0] = cm_id_priv; | |
192 | *msg = m; | |
193 | return 0; | |
194 | } | |
195 | ||
196 | static int cm_alloc_response_msg(struct cm_port *port, | |
197 | struct ib_mad_recv_wc *mad_recv_wc, | |
198 | struct ib_mad_send_buf **msg) | |
199 | { | |
200 | struct ib_mad_send_buf *m; | |
201 | struct ib_ah *ah; | |
202 | ||
203 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
204 | mad_recv_wc->recv_buf.grh, port->port_num); | |
205 | if (IS_ERR(ah)) | |
206 | return PTR_ERR(ah); | |
207 | ||
208 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 209 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
210 | GFP_ATOMIC); |
211 | if (IS_ERR(m)) { | |
212 | ib_destroy_ah(ah); | |
213 | return PTR_ERR(m); | |
214 | } | |
34816ad9 | 215 | m->ah = ah; |
a977049d HR |
216 | *msg = m; |
217 | return 0; | |
218 | } | |
219 | ||
220 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
221 | { | |
34816ad9 | 222 | ib_destroy_ah(msg->ah); |
a977049d HR |
223 | if (msg->context[0]) |
224 | cm_deref_id(msg->context[0]); | |
225 | ib_free_send_mad(msg); | |
226 | } | |
227 | ||
228 | static void * cm_copy_private_data(const void *private_data, | |
229 | u8 private_data_len) | |
230 | { | |
231 | void *data; | |
232 | ||
233 | if (!private_data || !private_data_len) | |
234 | return NULL; | |
235 | ||
236 | data = kmalloc(private_data_len, GFP_KERNEL); | |
237 | if (!data) | |
238 | return ERR_PTR(-ENOMEM); | |
239 | ||
240 | memcpy(data, private_data, private_data_len); | |
241 | return data; | |
242 | } | |
243 | ||
244 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
245 | void *private_data, u8 private_data_len) | |
246 | { | |
247 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
248 | kfree(cm_id_priv->private_data); | |
249 | ||
250 | cm_id_priv->private_data = private_data; | |
251 | cm_id_priv->private_data_len = private_data_len; | |
252 | } | |
253 | ||
254 | static void cm_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num, | |
255 | u16 dlid, u8 sl, u16 src_path_bits) | |
256 | { | |
257 | memset(ah_attr, 0, sizeof ah_attr); | |
97f52eb4 | 258 | ah_attr->dlid = dlid; |
a977049d HR |
259 | ah_attr->sl = sl; |
260 | ah_attr->src_path_bits = src_path_bits; | |
261 | ah_attr->port_num = port_num; | |
262 | } | |
263 | ||
264 | static void cm_init_av_for_response(struct cm_port *port, | |
265 | struct ib_wc *wc, struct cm_av *av) | |
266 | { | |
267 | av->port = port; | |
268 | av->pkey_index = wc->pkey_index; | |
97f52eb4 | 269 | cm_set_ah_attr(&av->ah_attr, port->port_num, wc->slid, |
a977049d HR |
270 | wc->sl, wc->dlid_path_bits); |
271 | } | |
272 | ||
273 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
274 | { | |
275 | struct cm_device *cm_dev; | |
276 | struct cm_port *port = NULL; | |
277 | unsigned long flags; | |
278 | int ret; | |
279 | u8 p; | |
280 | ||
281 | read_lock_irqsave(&cm.device_lock, flags); | |
282 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
283 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, | |
284 | &p, NULL)) { | |
285 | port = &cm_dev->port[p-1]; | |
286 | break; | |
287 | } | |
288 | } | |
289 | read_unlock_irqrestore(&cm.device_lock, flags); | |
290 | ||
291 | if (!port) | |
292 | return -EINVAL; | |
293 | ||
294 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, | |
295 | be16_to_cpu(path->pkey), &av->pkey_index); | |
296 | if (ret) | |
297 | return ret; | |
298 | ||
299 | av->port = port; | |
97f52eb4 SH |
300 | cm_set_ah_attr(&av->ah_attr, av->port->port_num, |
301 | be16_to_cpu(path->dlid), path->sl, | |
302 | be16_to_cpu(path->slid) & 0x7F); | |
a977049d HR |
303 | av->packet_life_time = path->packet_life_time; |
304 | return 0; | |
305 | } | |
306 | ||
307 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
308 | { | |
309 | unsigned long flags; | |
310 | int ret; | |
de1bb1a6 | 311 | static int next_id; |
a977049d HR |
312 | |
313 | do { | |
314 | spin_lock_irqsave(&cm.lock, flags); | |
de1bb1a6 | 315 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, next_id++, |
97f52eb4 | 316 | (__force int *) &cm_id_priv->id.local_id); |
a977049d HR |
317 | spin_unlock_irqrestore(&cm.lock, flags); |
318 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
319 | return ret; | |
320 | } | |
321 | ||
97f52eb4 | 322 | static void cm_free_id(__be32 local_id) |
a977049d HR |
323 | { |
324 | unsigned long flags; | |
325 | ||
326 | spin_lock_irqsave(&cm.lock, flags); | |
97f52eb4 | 327 | idr_remove(&cm.local_id_table, (__force int) local_id); |
a977049d HR |
328 | spin_unlock_irqrestore(&cm.lock, flags); |
329 | } | |
330 | ||
97f52eb4 | 331 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
332 | { |
333 | struct cm_id_private *cm_id_priv; | |
334 | ||
97f52eb4 | 335 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id); |
a977049d HR |
336 | if (cm_id_priv) { |
337 | if (cm_id_priv->id.remote_id == remote_id) | |
338 | atomic_inc(&cm_id_priv->refcount); | |
339 | else | |
340 | cm_id_priv = NULL; | |
341 | } | |
342 | ||
343 | return cm_id_priv; | |
344 | } | |
345 | ||
97f52eb4 | 346 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
347 | { |
348 | struct cm_id_private *cm_id_priv; | |
349 | unsigned long flags; | |
350 | ||
351 | spin_lock_irqsave(&cm.lock, flags); | |
352 | cm_id_priv = cm_get_id(local_id, remote_id); | |
353 | spin_unlock_irqrestore(&cm.lock, flags); | |
354 | ||
355 | return cm_id_priv; | |
356 | } | |
357 | ||
358 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) | |
359 | { | |
360 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
361 | struct rb_node *parent = NULL; | |
362 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
363 | __be64 service_id = cm_id_priv->id.service_id; |
364 | __be64 service_mask = cm_id_priv->id.service_mask; | |
a977049d HR |
365 | |
366 | while (*link) { | |
367 | parent = *link; | |
368 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
369 | service_node); | |
370 | if ((cur_cm_id_priv->id.service_mask & service_id) == | |
07d357d0 SH |
371 | (service_mask & cur_cm_id_priv->id.service_id) && |
372 | (cm_id_priv->id.device == cur_cm_id_priv->id.device)) | |
373 | return cur_cm_id_priv; | |
374 | ||
375 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
376 | link = &(*link)->rb_left; | |
377 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
378 | link = &(*link)->rb_right; | |
379 | else if (service_id < cur_cm_id_priv->id.service_id) | |
a977049d HR |
380 | link = &(*link)->rb_left; |
381 | else | |
382 | link = &(*link)->rb_right; | |
383 | } | |
384 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
385 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
386 | return NULL; | |
387 | } | |
388 | ||
07d357d0 SH |
389 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
390 | __be64 service_id) | |
a977049d HR |
391 | { |
392 | struct rb_node *node = cm.listen_service_table.rb_node; | |
393 | struct cm_id_private *cm_id_priv; | |
394 | ||
395 | while (node) { | |
396 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
397 | if ((cm_id_priv->id.service_mask & service_id) == | |
07d357d0 SH |
398 | cm_id_priv->id.service_id && |
399 | (cm_id_priv->id.device == device)) | |
a977049d | 400 | return cm_id_priv; |
07d357d0 SH |
401 | |
402 | if (device < cm_id_priv->id.device) | |
403 | node = node->rb_left; | |
404 | else if (device > cm_id_priv->id.device) | |
405 | node = node->rb_right; | |
406 | else if (service_id < cm_id_priv->id.service_id) | |
a977049d HR |
407 | node = node->rb_left; |
408 | else | |
409 | node = node->rb_right; | |
410 | } | |
411 | return NULL; | |
412 | } | |
413 | ||
414 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
415 | *timewait_info) | |
416 | { | |
417 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
418 | struct rb_node *parent = NULL; | |
419 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
420 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
421 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
422 | |
423 | while (*link) { | |
424 | parent = *link; | |
425 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
426 | remote_id_node); | |
427 | if (remote_id < cur_timewait_info->work.remote_id) | |
428 | link = &(*link)->rb_left; | |
429 | else if (remote_id > cur_timewait_info->work.remote_id) | |
430 | link = &(*link)->rb_right; | |
431 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
432 | link = &(*link)->rb_left; | |
433 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
434 | link = &(*link)->rb_right; | |
435 | else | |
436 | return cur_timewait_info; | |
437 | } | |
438 | timewait_info->inserted_remote_id = 1; | |
439 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
440 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
441 | return NULL; | |
442 | } | |
443 | ||
97f52eb4 SH |
444 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
445 | __be32 remote_id) | |
a977049d HR |
446 | { |
447 | struct rb_node *node = cm.remote_id_table.rb_node; | |
448 | struct cm_timewait_info *timewait_info; | |
449 | ||
450 | while (node) { | |
451 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
452 | remote_id_node); | |
453 | if (remote_id < timewait_info->work.remote_id) | |
454 | node = node->rb_left; | |
455 | else if (remote_id > timewait_info->work.remote_id) | |
456 | node = node->rb_right; | |
457 | else if (remote_ca_guid < timewait_info->remote_ca_guid) | |
458 | node = node->rb_left; | |
459 | else if (remote_ca_guid > timewait_info->remote_ca_guid) | |
460 | node = node->rb_right; | |
461 | else | |
462 | return timewait_info; | |
463 | } | |
464 | return NULL; | |
465 | } | |
466 | ||
467 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
468 | *timewait_info) | |
469 | { | |
470 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
471 | struct rb_node *parent = NULL; | |
472 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
473 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
474 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
475 | |
476 | while (*link) { | |
477 | parent = *link; | |
478 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
479 | remote_qp_node); | |
480 | if (remote_qpn < cur_timewait_info->remote_qpn) | |
481 | link = &(*link)->rb_left; | |
482 | else if (remote_qpn > cur_timewait_info->remote_qpn) | |
483 | link = &(*link)->rb_right; | |
484 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
485 | link = &(*link)->rb_left; | |
486 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
487 | link = &(*link)->rb_right; | |
488 | else | |
489 | return cur_timewait_info; | |
490 | } | |
491 | timewait_info->inserted_remote_qp = 1; | |
492 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
493 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
494 | return NULL; | |
495 | } | |
496 | ||
497 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
498 | *cm_id_priv) | |
499 | { | |
500 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
501 | struct rb_node *parent = NULL; | |
502 | struct cm_id_private *cur_cm_id_priv; | |
503 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 504 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
505 | |
506 | while (*link) { | |
507 | parent = *link; | |
508 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
509 | sidr_id_node); | |
510 | if (remote_id < cur_cm_id_priv->id.remote_id) | |
511 | link = &(*link)->rb_left; | |
512 | else if (remote_id > cur_cm_id_priv->id.remote_id) | |
513 | link = &(*link)->rb_right; | |
514 | else { | |
515 | int cmp; | |
516 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
517 | sizeof *port_gid); | |
518 | if (cmp < 0) | |
519 | link = &(*link)->rb_left; | |
520 | else if (cmp > 0) | |
521 | link = &(*link)->rb_right; | |
522 | else | |
523 | return cur_cm_id_priv; | |
524 | } | |
525 | } | |
526 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
527 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
528 | return NULL; | |
529 | } | |
530 | ||
531 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
532 | enum ib_cm_sidr_status status) | |
533 | { | |
534 | struct ib_cm_sidr_rep_param param; | |
535 | ||
536 | memset(¶m, 0, sizeof param); | |
537 | param.status = status; | |
538 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
539 | } | |
540 | ||
07d357d0 SH |
541 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
542 | ib_cm_handler cm_handler, | |
a977049d HR |
543 | void *context) |
544 | { | |
545 | struct cm_id_private *cm_id_priv; | |
546 | int ret; | |
547 | ||
de6eb66b | 548 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
549 | if (!cm_id_priv) |
550 | return ERR_PTR(-ENOMEM); | |
551 | ||
a977049d | 552 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 553 | cm_id_priv->id.device = device; |
a977049d HR |
554 | cm_id_priv->id.cm_handler = cm_handler; |
555 | cm_id_priv->id.context = context; | |
354ba39c | 556 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
557 | ret = cm_alloc_id(cm_id_priv); |
558 | if (ret) | |
559 | goto error; | |
560 | ||
561 | spin_lock_init(&cm_id_priv->lock); | |
562 | init_waitqueue_head(&cm_id_priv->wait); | |
563 | INIT_LIST_HEAD(&cm_id_priv->work_list); | |
564 | atomic_set(&cm_id_priv->work_count, -1); | |
565 | atomic_set(&cm_id_priv->refcount, 1); | |
566 | return &cm_id_priv->id; | |
567 | ||
568 | error: | |
569 | kfree(cm_id_priv); | |
570 | return ERR_PTR(-ENOMEM); | |
571 | } | |
572 | EXPORT_SYMBOL(ib_create_cm_id); | |
573 | ||
574 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
575 | { | |
576 | struct cm_work *work; | |
577 | ||
578 | if (list_empty(&cm_id_priv->work_list)) | |
579 | return NULL; | |
580 | ||
581 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
582 | list_del(&work->list); | |
583 | return work; | |
584 | } | |
585 | ||
586 | static void cm_free_work(struct cm_work *work) | |
587 | { | |
588 | if (work->mad_recv_wc) | |
589 | ib_free_recv_mad(work->mad_recv_wc); | |
590 | kfree(work); | |
591 | } | |
592 | ||
593 | static inline int cm_convert_to_ms(int iba_time) | |
594 | { | |
595 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
596 | return 1 << max(iba_time - 8, 0); | |
597 | } | |
598 | ||
599 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) | |
600 | { | |
601 | unsigned long flags; | |
602 | ||
603 | if (!timewait_info->inserted_remote_id && | |
604 | !timewait_info->inserted_remote_qp) | |
605 | return; | |
606 | ||
607 | spin_lock_irqsave(&cm.lock, flags); | |
608 | if (timewait_info->inserted_remote_id) { | |
609 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
610 | timewait_info->inserted_remote_id = 0; | |
611 | } | |
612 | ||
613 | if (timewait_info->inserted_remote_qp) { | |
614 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
615 | timewait_info->inserted_remote_qp = 0; | |
616 | } | |
617 | spin_unlock_irqrestore(&cm.lock, flags); | |
618 | } | |
619 | ||
97f52eb4 | 620 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
621 | { |
622 | struct cm_timewait_info *timewait_info; | |
623 | ||
de6eb66b | 624 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
625 | if (!timewait_info) |
626 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
627 | |
628 | timewait_info->work.local_id = local_id; | |
629 | INIT_WORK(&timewait_info->work.work, cm_work_handler, | |
630 | &timewait_info->work); | |
631 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; | |
632 | return timewait_info; | |
633 | } | |
634 | ||
635 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
636 | { | |
637 | int wait_time; | |
638 | ||
639 | /* | |
640 | * The cm_id could be destroyed by the user before we exit timewait. | |
641 | * To protect against this, we search for the cm_id after exiting | |
642 | * timewait before notifying the user that we've exited timewait. | |
643 | */ | |
644 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
645 | wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout); | |
646 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
647 | msecs_to_jiffies(wait_time)); | |
648 | cm_id_priv->timewait_info = NULL; | |
649 | } | |
650 | ||
651 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
652 | { | |
653 | cm_id_priv->id.state = IB_CM_IDLE; | |
654 | if (cm_id_priv->timewait_info) { | |
655 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
656 | kfree(cm_id_priv->timewait_info); | |
657 | cm_id_priv->timewait_info = NULL; | |
658 | } | |
659 | } | |
660 | ||
661 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
662 | { | |
663 | struct cm_id_private *cm_id_priv; | |
664 | struct cm_work *work; | |
665 | unsigned long flags; | |
666 | ||
667 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
668 | retest: | |
669 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
670 | switch (cm_id->state) { | |
671 | case IB_CM_LISTEN: | |
672 | cm_id->state = IB_CM_IDLE; | |
673 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
674 | spin_lock_irqsave(&cm.lock, flags); | |
675 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); | |
676 | spin_unlock_irqrestore(&cm.lock, flags); | |
677 | break; | |
678 | case IB_CM_SIDR_REQ_SENT: | |
679 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 680 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
681 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
682 | break; | |
683 | case IB_CM_SIDR_REQ_RCVD: | |
684 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
685 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); | |
686 | break; | |
687 | case IB_CM_REQ_SENT: | |
227eca83 SH |
688 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
689 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
690 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, | |
691 | &cm_id_priv->av.port->cm_dev->ca_guid, | |
692 | sizeof cm_id_priv->av.port->cm_dev->ca_guid, | |
693 | NULL, 0); | |
694 | break; | |
a977049d HR |
695 | case IB_CM_MRA_REQ_RCVD: |
696 | case IB_CM_REP_SENT: | |
697 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 698 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
699 | /* Fall through */ |
700 | case IB_CM_REQ_RCVD: | |
701 | case IB_CM_MRA_REQ_SENT: | |
702 | case IB_CM_REP_RCVD: | |
703 | case IB_CM_MRA_REP_SENT: | |
704 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
227eca83 SH |
705 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
706 | NULL, 0, NULL, 0); | |
a977049d HR |
707 | break; |
708 | case IB_CM_ESTABLISHED: | |
709 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
710 | ib_send_cm_dreq(cm_id, NULL, 0); | |
711 | goto retest; | |
712 | case IB_CM_DREQ_SENT: | |
34816ad9 | 713 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
714 | cm_enter_timewait(cm_id_priv); |
715 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
716 | break; | |
717 | case IB_CM_DREQ_RCVD: | |
718 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
719 | ib_send_cm_drep(cm_id, NULL, 0); | |
720 | break; | |
721 | default: | |
722 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
723 | break; | |
724 | } | |
725 | ||
726 | cm_free_id(cm_id->local_id); | |
727 | atomic_dec(&cm_id_priv->refcount); | |
728 | wait_event(cm_id_priv->wait, !atomic_read(&cm_id_priv->refcount)); | |
729 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) | |
730 | cm_free_work(work); | |
731 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
732 | kfree(cm_id_priv->private_data); | |
733 | kfree(cm_id_priv); | |
734 | } | |
735 | EXPORT_SYMBOL(ib_destroy_cm_id); | |
736 | ||
737 | int ib_cm_listen(struct ib_cm_id *cm_id, | |
97f52eb4 SH |
738 | __be64 service_id, |
739 | __be64 service_mask) | |
a977049d HR |
740 | { |
741 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
742 | unsigned long flags; | |
743 | int ret = 0; | |
744 | ||
97f52eb4 SH |
745 | service_mask = service_mask ? service_mask : |
746 | __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
747 | service_id &= service_mask; |
748 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
749 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
750 | return -EINVAL; | |
751 | ||
752 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
753 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
754 | ||
755 | cm_id->state = IB_CM_LISTEN; | |
756 | ||
757 | spin_lock_irqsave(&cm.lock, flags); | |
758 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 SH |
759 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
760 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
761 | } else { |
762 | cm_id->service_id = service_id; | |
763 | cm_id->service_mask = service_mask; | |
764 | } | |
765 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
766 | spin_unlock_irqrestore(&cm.lock, flags); | |
767 | ||
768 | if (cur_cm_id_priv) { | |
769 | cm_id->state = IB_CM_IDLE; | |
770 | ret = -EBUSY; | |
771 | } | |
772 | return ret; | |
773 | } | |
774 | EXPORT_SYMBOL(ib_cm_listen); | |
775 | ||
97f52eb4 SH |
776 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
777 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
778 | { |
779 | u64 hi_tid, low_tid; | |
780 | ||
781 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
782 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
783 | (msg_seq << 30)); | |
a977049d HR |
784 | return cpu_to_be64(hi_tid | low_tid); |
785 | } | |
786 | ||
787 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 788 | __be16 attr_id, __be64 tid) |
a977049d HR |
789 | { |
790 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
791 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
792 | hdr->class_version = IB_CM_CLASS_VERSION; | |
793 | hdr->method = IB_MGMT_METHOD_SEND; | |
794 | hdr->attr_id = attr_id; | |
795 | hdr->tid = tid; | |
796 | } | |
797 | ||
798 | static void cm_format_req(struct cm_req_msg *req_msg, | |
799 | struct cm_id_private *cm_id_priv, | |
800 | struct ib_cm_req_param *param) | |
801 | { | |
802 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, | |
803 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
804 | ||
805 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
806 | req_msg->service_id = param->service_id; | |
807 | req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
808 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); | |
809 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
810 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
811 | cm_req_set_remote_resp_timeout(req_msg, | |
812 | param->remote_cm_response_timeout); | |
813 | cm_req_set_qp_type(req_msg, param->qp_type); | |
814 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
815 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
816 | cm_req_set_local_resp_timeout(req_msg, | |
817 | param->local_cm_response_timeout); | |
818 | cm_req_set_retry_count(req_msg, param->retry_count); | |
819 | req_msg->pkey = param->primary_path->pkey; | |
820 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
821 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
822 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
823 | cm_req_set_srq(req_msg, param->srq); | |
824 | ||
825 | req_msg->primary_local_lid = param->primary_path->slid; | |
826 | req_msg->primary_remote_lid = param->primary_path->dlid; | |
827 | req_msg->primary_local_gid = param->primary_path->sgid; | |
828 | req_msg->primary_remote_gid = param->primary_path->dgid; | |
829 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); | |
830 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); | |
831 | req_msg->primary_traffic_class = param->primary_path->traffic_class; | |
832 | req_msg->primary_hop_limit = param->primary_path->hop_limit; | |
833 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); | |
834 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ | |
835 | cm_req_set_primary_local_ack_timeout(req_msg, | |
836 | min(31, param->primary_path->packet_life_time + 1)); | |
837 | ||
838 | if (param->alternate_path) { | |
839 | req_msg->alt_local_lid = param->alternate_path->slid; | |
840 | req_msg->alt_remote_lid = param->alternate_path->dlid; | |
841 | req_msg->alt_local_gid = param->alternate_path->sgid; | |
842 | req_msg->alt_remote_gid = param->alternate_path->dgid; | |
843 | cm_req_set_alt_flow_label(req_msg, | |
844 | param->alternate_path->flow_label); | |
845 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); | |
846 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; | |
847 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; | |
848 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); | |
849 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ | |
850 | cm_req_set_alt_local_ack_timeout(req_msg, | |
851 | min(31, param->alternate_path->packet_life_time + 1)); | |
852 | } | |
853 | ||
854 | if (param->private_data && param->private_data_len) | |
855 | memcpy(req_msg->private_data, param->private_data, | |
856 | param->private_data_len); | |
857 | } | |
858 | ||
858119e1 | 859 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
860 | { |
861 | /* peer-to-peer not supported */ | |
862 | if (param->peer_to_peer) | |
863 | return -EINVAL; | |
864 | ||
865 | if (!param->primary_path) | |
866 | return -EINVAL; | |
867 | ||
868 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
869 | return -EINVAL; | |
870 | ||
871 | if (param->private_data && | |
872 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
873 | return -EINVAL; | |
874 | ||
875 | if (param->alternate_path && | |
876 | (param->alternate_path->pkey != param->primary_path->pkey || | |
877 | param->alternate_path->mtu != param->primary_path->mtu)) | |
878 | return -EINVAL; | |
879 | ||
880 | return 0; | |
881 | } | |
882 | ||
883 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
884 | struct ib_cm_req_param *param) | |
885 | { | |
886 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
887 | struct cm_req_msg *req_msg; |
888 | unsigned long flags; | |
889 | int ret; | |
890 | ||
891 | ret = cm_validate_req_param(param); | |
892 | if (ret) | |
893 | return ret; | |
894 | ||
895 | /* Verify that we're not in timewait. */ | |
896 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
897 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
898 | if (cm_id->state != IB_CM_IDLE) { | |
899 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
900 | ret = -EINVAL; | |
901 | goto out; | |
902 | } | |
903 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
904 | ||
905 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
906 | id.local_id); | |
907 | if (IS_ERR(cm_id_priv->timewait_info)) | |
908 | goto out; | |
909 | ||
910 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
911 | if (ret) | |
912 | goto error1; | |
913 | if (param->alternate_path) { | |
914 | ret = cm_init_av_by_path(param->alternate_path, | |
915 | &cm_id_priv->alt_av); | |
916 | if (ret) | |
917 | goto error1; | |
918 | } | |
919 | cm_id->service_id = param->service_id; | |
97f52eb4 | 920 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
921 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
922 | param->primary_path->packet_life_time) * 2 + | |
923 | cm_convert_to_ms( | |
924 | param->remote_cm_response_timeout); | |
925 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
926 | cm_id_priv->initiator_depth = param->initiator_depth; | |
927 | cm_id_priv->responder_resources = param->responder_resources; | |
928 | cm_id_priv->retry_count = param->retry_count; | |
929 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
ae7971a7 | 930 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
931 | |
932 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
933 | if (ret) | |
934 | goto error1; | |
935 | ||
936 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
937 | cm_format_req(req_msg, cm_id_priv, param); | |
938 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 939 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
940 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
941 | ||
942 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
943 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
944 | cm_id_priv->local_ack_timeout = | |
945 | cm_req_get_primary_local_ack_timeout(req_msg); | |
946 | ||
947 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 948 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
949 | if (ret) { |
950 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
951 | goto error2; | |
952 | } | |
953 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
954 | cm_id->state = IB_CM_REQ_SENT; | |
955 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
956 | return 0; | |
957 | ||
958 | error2: cm_free_msg(cm_id_priv->msg); | |
959 | error1: kfree(cm_id_priv->timewait_info); | |
960 | out: return ret; | |
961 | } | |
962 | EXPORT_SYMBOL(ib_send_cm_req); | |
963 | ||
964 | static int cm_issue_rej(struct cm_port *port, | |
965 | struct ib_mad_recv_wc *mad_recv_wc, | |
966 | enum ib_cm_rej_reason reason, | |
967 | enum cm_msg_response msg_rejected, | |
968 | void *ari, u8 ari_length) | |
969 | { | |
970 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
971 | struct cm_rej_msg *rej_msg, *rcv_msg; |
972 | int ret; | |
973 | ||
974 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
975 | if (ret) | |
976 | return ret; | |
977 | ||
978 | /* We just need common CM header information. Cast to any message. */ | |
979 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
980 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
981 | ||
982 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
983 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
984 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
985 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 986 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
987 | |
988 | if (ari && ari_length) { | |
989 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
990 | memcpy(rej_msg->ari, ari, ari_length); | |
991 | } | |
992 | ||
34816ad9 | 993 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
994 | if (ret) |
995 | cm_free_msg(msg); | |
996 | ||
997 | return ret; | |
998 | } | |
999 | ||
97f52eb4 SH |
1000 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1001 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1002 | { |
1003 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1004 | ((local_ca_guid == remote_ca_guid) && | |
1005 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1006 | } | |
1007 | ||
858119e1 | 1008 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1009 | struct ib_sa_path_rec *primary_path, |
1010 | struct ib_sa_path_rec *alt_path) | |
1011 | { | |
1012 | memset(primary_path, 0, sizeof *primary_path); | |
1013 | primary_path->dgid = req_msg->primary_local_gid; | |
1014 | primary_path->sgid = req_msg->primary_remote_gid; | |
1015 | primary_path->dlid = req_msg->primary_local_lid; | |
1016 | primary_path->slid = req_msg->primary_remote_lid; | |
1017 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1018 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1019 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1020 | primary_path->reversible = 1; | |
1021 | primary_path->pkey = req_msg->pkey; | |
1022 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1023 | primary_path->mtu_selector = IB_SA_EQ; | |
1024 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1025 | primary_path->rate_selector = IB_SA_EQ; | |
1026 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1027 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1028 | primary_path->packet_life_time = | |
1029 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1030 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1031 | ||
1032 | if (req_msg->alt_local_lid) { | |
1033 | memset(alt_path, 0, sizeof *alt_path); | |
1034 | alt_path->dgid = req_msg->alt_local_gid; | |
1035 | alt_path->sgid = req_msg->alt_remote_gid; | |
1036 | alt_path->dlid = req_msg->alt_local_lid; | |
1037 | alt_path->slid = req_msg->alt_remote_lid; | |
1038 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1039 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1040 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1041 | alt_path->reversible = 1; | |
1042 | alt_path->pkey = req_msg->pkey; | |
1043 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1044 | alt_path->mtu_selector = IB_SA_EQ; | |
1045 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1046 | alt_path->rate_selector = IB_SA_EQ; | |
1047 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1048 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1049 | alt_path->packet_life_time = | |
1050 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1051 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | static void cm_format_req_event(struct cm_work *work, | |
1056 | struct cm_id_private *cm_id_priv, | |
1057 | struct ib_cm_id *listen_id) | |
1058 | { | |
1059 | struct cm_req_msg *req_msg; | |
1060 | struct ib_cm_req_event_param *param; | |
1061 | ||
1062 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1063 | param = &work->cm_event.param.req_rcvd; | |
1064 | param->listen_id = listen_id; | |
a977049d HR |
1065 | param->port = cm_id_priv->av.port->port_num; |
1066 | param->primary_path = &work->path[0]; | |
1067 | if (req_msg->alt_local_lid) | |
1068 | param->alternate_path = &work->path[1]; | |
1069 | else | |
1070 | param->alternate_path = NULL; | |
1071 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1072 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1073 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1074 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1075 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1076 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1077 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1078 | param->local_cm_response_timeout = | |
1079 | cm_req_get_remote_resp_timeout(req_msg); | |
1080 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1081 | param->remote_cm_response_timeout = | |
1082 | cm_req_get_local_resp_timeout(req_msg); | |
1083 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1084 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1085 | param->srq = cm_req_get_srq(req_msg); | |
1086 | work->cm_event.private_data = &req_msg->private_data; | |
1087 | } | |
1088 | ||
1089 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1090 | struct cm_work *work) | |
1091 | { | |
1092 | unsigned long flags; | |
1093 | int ret; | |
1094 | ||
1095 | /* We will typically only have the current event to report. */ | |
1096 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1097 | cm_free_work(work); | |
1098 | ||
1099 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
1100 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1101 | work = cm_dequeue_work(cm_id_priv); | |
1102 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1103 | BUG_ON(!work); | |
1104 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1105 | &work->cm_event); | |
1106 | cm_free_work(work); | |
1107 | } | |
1108 | cm_deref_id(cm_id_priv); | |
1109 | if (ret) | |
1110 | ib_destroy_cm_id(&cm_id_priv->id); | |
1111 | } | |
1112 | ||
1113 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1114 | struct cm_id_private *cm_id_priv, | |
1115 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1116 | const void *private_data, u8 private_data_len) | |
1117 | { | |
1118 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1119 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1120 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1121 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1122 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1123 | ||
1124 | if (private_data && private_data_len) | |
1125 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1126 | } | |
1127 | ||
1128 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1129 | struct cm_id_private *cm_id_priv, | |
1130 | enum ib_cm_rej_reason reason, | |
1131 | void *ari, | |
1132 | u8 ari_length, | |
1133 | const void *private_data, | |
1134 | u8 private_data_len) | |
1135 | { | |
1136 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1137 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1138 | ||
1139 | switch(cm_id_priv->id.state) { | |
1140 | case IB_CM_REQ_RCVD: | |
1141 | rej_msg->local_comm_id = 0; | |
1142 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1143 | break; | |
1144 | case IB_CM_MRA_REQ_SENT: | |
1145 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1146 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1147 | break; | |
1148 | case IB_CM_REP_RCVD: | |
1149 | case IB_CM_MRA_REP_SENT: | |
1150 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1151 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1152 | break; | |
1153 | default: | |
1154 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1155 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1156 | break; | |
1157 | } | |
1158 | ||
97f52eb4 | 1159 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1160 | if (ari && ari_length) { |
1161 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1162 | memcpy(rej_msg->ari, ari, ari_length); | |
1163 | } | |
1164 | ||
1165 | if (private_data && private_data_len) | |
1166 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1167 | } | |
1168 | ||
1169 | static void cm_dup_req_handler(struct cm_work *work, | |
1170 | struct cm_id_private *cm_id_priv) | |
1171 | { | |
1172 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1173 | unsigned long flags; |
1174 | int ret; | |
1175 | ||
1176 | /* Quick state check to discard duplicate REQs. */ | |
1177 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1178 | return; | |
1179 | ||
1180 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1181 | if (ret) | |
1182 | return; | |
1183 | ||
1184 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1185 | switch (cm_id_priv->id.state) { | |
1186 | case IB_CM_MRA_REQ_SENT: | |
1187 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1188 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1189 | cm_id_priv->private_data, | |
1190 | cm_id_priv->private_data_len); | |
1191 | break; | |
1192 | case IB_CM_TIMEWAIT: | |
1193 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1194 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1195 | break; | |
1196 | default: | |
1197 | goto unlock; | |
1198 | } | |
1199 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1200 | ||
34816ad9 | 1201 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1202 | if (ret) |
1203 | goto free; | |
1204 | return; | |
1205 | ||
1206 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1207 | free: cm_free_msg(msg); | |
1208 | } | |
1209 | ||
1210 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1211 | struct cm_id_private *cm_id_priv) | |
1212 | { | |
1213 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1214 | struct cm_timewait_info *timewait_info; | |
1215 | struct cm_req_msg *req_msg; | |
1216 | unsigned long flags; | |
1217 | ||
1218 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1219 | ||
1220 | /* Check for duplicate REQ and stale connections. */ | |
1221 | spin_lock_irqsave(&cm.lock, flags); | |
1222 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); | |
1223 | if (!timewait_info) | |
1224 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1225 | ||
1226 | if (timewait_info) { | |
1227 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1228 | timewait_info->work.remote_id); | |
1229 | spin_unlock_irqrestore(&cm.lock, flags); | |
1230 | if (cur_cm_id_priv) { | |
1231 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1232 | cm_deref_id(cur_cm_id_priv); | |
1233 | } else | |
1234 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1235 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1236 | NULL, 0); | |
1237 | goto error; | |
1238 | } | |
1239 | ||
1240 | /* Find matching listen request. */ | |
07d357d0 SH |
1241 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
1242 | req_msg->service_id); | |
a977049d HR |
1243 | if (!listen_cm_id_priv) { |
1244 | spin_unlock_irqrestore(&cm.lock, flags); | |
1245 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1246 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1247 | NULL, 0); | |
1248 | goto error; | |
1249 | } | |
1250 | atomic_inc(&listen_cm_id_priv->refcount); | |
1251 | atomic_inc(&cm_id_priv->refcount); | |
1252 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1253 | atomic_inc(&cm_id_priv->work_count); | |
1254 | spin_unlock_irqrestore(&cm.lock, flags); | |
1255 | return listen_cm_id_priv; | |
1256 | ||
1257 | error: cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1258 | return NULL; | |
1259 | } | |
1260 | ||
1261 | static int cm_req_handler(struct cm_work *work) | |
1262 | { | |
1263 | struct ib_cm_id *cm_id; | |
1264 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1265 | struct cm_req_msg *req_msg; | |
1266 | int ret; | |
1267 | ||
1268 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1269 | ||
07d357d0 | 1270 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
1271 | if (IS_ERR(cm_id)) |
1272 | return PTR_ERR(cm_id); | |
1273 | ||
1274 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1275 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1276 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
1277 | &cm_id_priv->av); | |
1278 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1279 | id.local_id); | |
1280 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1281 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
1282 | goto error1; | |
1283 | } | |
1284 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1285 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1286 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1287 | ||
1288 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1289 | if (!listen_cm_id_priv) { | |
1290 | ret = -EINVAL; | |
1291 | goto error2; | |
1292 | } | |
1293 | ||
1294 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1295 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1296 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1297 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1298 | |
1299 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); | |
1300 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
1301 | if (ret) | |
1302 | goto error3; | |
1303 | if (req_msg->alt_local_lid) { | |
1304 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
1305 | if (ret) | |
1306 | goto error3; | |
1307 | } | |
1308 | cm_id_priv->tid = req_msg->hdr.tid; | |
1309 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1310 | cm_req_get_local_resp_timeout(req_msg)); | |
1311 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1312 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1313 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1314 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1315 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
1316 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); | |
1317 | cm_id_priv->local_ack_timeout = | |
1318 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1319 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); | |
1320 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1321 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1322 | |
1323 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1324 | cm_process_work(cm_id_priv, work); | |
1325 | cm_deref_id(listen_cm_id_priv); | |
1326 | return 0; | |
1327 | ||
1328 | error3: atomic_dec(&cm_id_priv->refcount); | |
1329 | cm_deref_id(listen_cm_id_priv); | |
1330 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1331 | error2: kfree(cm_id_priv->timewait_info); | |
1b205c2d | 1332 | cm_id_priv->timewait_info = NULL; |
a977049d HR |
1333 | error1: ib_destroy_cm_id(&cm_id_priv->id); |
1334 | return ret; | |
1335 | } | |
1336 | ||
1337 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1338 | struct cm_id_private *cm_id_priv, | |
1339 | struct ib_cm_rep_param *param) | |
1340 | { | |
1341 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1342 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1343 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1344 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1345 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1346 | rep_msg->resp_resources = param->responder_resources; | |
1347 | rep_msg->initiator_depth = param->initiator_depth; | |
1348 | cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); | |
1349 | cm_rep_set_failover(rep_msg, param->failover_accepted); | |
1350 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1351 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1352 | cm_rep_set_srq(rep_msg, param->srq); | |
1353 | rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
1354 | ||
1355 | if (param->private_data && param->private_data_len) | |
1356 | memcpy(rep_msg->private_data, param->private_data, | |
1357 | param->private_data_len); | |
1358 | } | |
1359 | ||
1360 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1361 | struct ib_cm_rep_param *param) | |
1362 | { | |
1363 | struct cm_id_private *cm_id_priv; | |
1364 | struct ib_mad_send_buf *msg; | |
1365 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1366 | unsigned long flags; |
1367 | int ret; | |
1368 | ||
1369 | if (param->private_data && | |
1370 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1371 | return -EINVAL; | |
1372 | ||
1373 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1374 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1375 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1376 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1377 | ret = -EINVAL; | |
1378 | goto out; | |
1379 | } | |
1380 | ||
1381 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1382 | if (ret) | |
1383 | goto out; | |
1384 | ||
1385 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1386 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1387 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1388 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1389 | ||
34816ad9 | 1390 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1391 | if (ret) { |
1392 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1393 | cm_free_msg(msg); | |
1394 | return ret; | |
1395 | } | |
1396 | ||
1397 | cm_id->state = IB_CM_REP_SENT; | |
1398 | cm_id_priv->msg = msg; | |
1399 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1400 | cm_id_priv->responder_resources = param->responder_resources; | |
1401 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1402 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1403 | ||
1404 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1405 | return ret; | |
1406 | } | |
1407 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1408 | ||
1409 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1410 | struct cm_id_private *cm_id_priv, | |
1411 | const void *private_data, | |
1412 | u8 private_data_len) | |
1413 | { | |
1414 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1415 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1416 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1417 | ||
1418 | if (private_data && private_data_len) | |
1419 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1420 | } | |
1421 | ||
1422 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1423 | const void *private_data, | |
1424 | u8 private_data_len) | |
1425 | { | |
1426 | struct cm_id_private *cm_id_priv; | |
1427 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1428 | unsigned long flags; |
1429 | void *data; | |
1430 | int ret; | |
1431 | ||
1432 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1433 | return -EINVAL; | |
1434 | ||
1435 | data = cm_copy_private_data(private_data, private_data_len); | |
1436 | if (IS_ERR(data)) | |
1437 | return PTR_ERR(data); | |
1438 | ||
1439 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1440 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1441 | if (cm_id->state != IB_CM_REP_RCVD && | |
1442 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1443 | ret = -EINVAL; | |
1444 | goto error; | |
1445 | } | |
1446 | ||
1447 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1448 | if (ret) | |
1449 | goto error; | |
1450 | ||
1451 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1452 | private_data, private_data_len); | |
1453 | ||
34816ad9 | 1454 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1455 | if (ret) { |
1456 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1457 | cm_free_msg(msg); | |
1458 | kfree(data); | |
1459 | return ret; | |
1460 | } | |
1461 | ||
1462 | cm_id->state = IB_CM_ESTABLISHED; | |
1463 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1464 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1465 | return 0; | |
1466 | ||
1467 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1468 | kfree(data); | |
1469 | return ret; | |
1470 | } | |
1471 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1472 | ||
1473 | static void cm_format_rep_event(struct cm_work *work) | |
1474 | { | |
1475 | struct cm_rep_msg *rep_msg; | |
1476 | struct ib_cm_rep_event_param *param; | |
1477 | ||
1478 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1479 | param = &work->cm_event.param.rep_rcvd; | |
1480 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1481 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1482 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1483 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1484 | param->responder_resources = rep_msg->initiator_depth; | |
1485 | param->initiator_depth = rep_msg->resp_resources; | |
1486 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1487 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1488 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1489 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1490 | param->srq = cm_rep_get_srq(rep_msg); | |
1491 | work->cm_event.private_data = &rep_msg->private_data; | |
1492 | } | |
1493 | ||
1494 | static void cm_dup_rep_handler(struct cm_work *work) | |
1495 | { | |
1496 | struct cm_id_private *cm_id_priv; | |
1497 | struct cm_rep_msg *rep_msg; | |
1498 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1499 | unsigned long flags; |
1500 | int ret; | |
1501 | ||
1502 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1503 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1504 | rep_msg->local_comm_id); | |
1505 | if (!cm_id_priv) | |
1506 | return; | |
1507 | ||
1508 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1509 | if (ret) | |
1510 | goto deref; | |
1511 | ||
1512 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1513 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) | |
1514 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1515 | cm_id_priv->private_data, | |
1516 | cm_id_priv->private_data_len); | |
1517 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1518 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1519 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1520 | cm_id_priv->private_data, | |
1521 | cm_id_priv->private_data_len); | |
1522 | else | |
1523 | goto unlock; | |
1524 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1525 | ||
34816ad9 | 1526 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1527 | if (ret) |
1528 | goto free; | |
1529 | goto deref; | |
1530 | ||
1531 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1532 | free: cm_free_msg(msg); | |
1533 | deref: cm_deref_id(cm_id_priv); | |
1534 | } | |
1535 | ||
1536 | static int cm_rep_handler(struct cm_work *work) | |
1537 | { | |
1538 | struct cm_id_private *cm_id_priv; | |
1539 | struct cm_rep_msg *rep_msg; | |
1540 | unsigned long flags; | |
1541 | int ret; | |
1542 | ||
1543 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1544 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1545 | if (!cm_id_priv) { | |
1546 | cm_dup_rep_handler(work); | |
1547 | return -EINVAL; | |
1548 | } | |
1549 | ||
87fd1a11 SH |
1550 | cm_format_rep_event(work); |
1551 | ||
1552 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1553 | switch (cm_id_priv->id.state) { | |
1554 | case IB_CM_REQ_SENT: | |
1555 | case IB_CM_MRA_REQ_RCVD: | |
1556 | break; | |
1557 | default: | |
1558 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1559 | ret = -EINVAL; | |
1560 | goto error; | |
1561 | } | |
1562 | ||
a977049d HR |
1563 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1564 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1565 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1566 | ||
87fd1a11 | 1567 | spin_lock(&cm.lock); |
a977049d HR |
1568 | /* Check for duplicate REP. */ |
1569 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1570 | spin_unlock(&cm.lock); |
1571 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1572 | ret = -EINVAL; |
1573 | goto error; | |
1574 | } | |
1575 | /* Check for a stale connection. */ | |
1576 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1577 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1578 | &cm.remote_id_table); | |
1579 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1580 | spin_unlock(&cm.lock); | |
1581 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1582 | cm_issue_rej(work->port, work->mad_recv_wc, |
1583 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1584 | NULL, 0); | |
1585 | ret = -EINVAL; | |
1586 | goto error; | |
1587 | } | |
87fd1a11 | 1588 | spin_unlock(&cm.lock); |
a977049d | 1589 | |
a977049d HR |
1590 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1591 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1592 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1593 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1594 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1595 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1596 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1597 | ||
1598 | /* todo: handle peer_to_peer */ | |
1599 | ||
34816ad9 | 1600 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1601 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1602 | if (!ret) | |
1603 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1604 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1605 | ||
1606 | if (ret) | |
1607 | cm_process_work(cm_id_priv, work); | |
1608 | else | |
1609 | cm_deref_id(cm_id_priv); | |
1610 | return 0; | |
1611 | ||
87fd1a11 | 1612 | error: |
a977049d HR |
1613 | cm_deref_id(cm_id_priv); |
1614 | return ret; | |
1615 | } | |
1616 | ||
1617 | static int cm_establish_handler(struct cm_work *work) | |
1618 | { | |
1619 | struct cm_id_private *cm_id_priv; | |
1620 | unsigned long flags; | |
1621 | int ret; | |
1622 | ||
1623 | /* See comment in ib_cm_establish about lookup. */ | |
1624 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); | |
1625 | if (!cm_id_priv) | |
1626 | return -EINVAL; | |
1627 | ||
1628 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1629 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { | |
1630 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1631 | goto out; | |
1632 | } | |
1633 | ||
34816ad9 | 1634 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1635 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1636 | if (!ret) | |
1637 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1638 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1639 | ||
1640 | if (ret) | |
1641 | cm_process_work(cm_id_priv, work); | |
1642 | else | |
1643 | cm_deref_id(cm_id_priv); | |
1644 | return 0; | |
1645 | out: | |
1646 | cm_deref_id(cm_id_priv); | |
1647 | return -EINVAL; | |
1648 | } | |
1649 | ||
1650 | static int cm_rtu_handler(struct cm_work *work) | |
1651 | { | |
1652 | struct cm_id_private *cm_id_priv; | |
1653 | struct cm_rtu_msg *rtu_msg; | |
1654 | unsigned long flags; | |
1655 | int ret; | |
1656 | ||
1657 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1658 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1659 | rtu_msg->local_comm_id); | |
1660 | if (!cm_id_priv) | |
1661 | return -EINVAL; | |
1662 | ||
1663 | work->cm_event.private_data = &rtu_msg->private_data; | |
1664 | ||
1665 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1666 | if (cm_id_priv->id.state != IB_CM_REP_SENT && | |
1667 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
1668 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1669 | goto out; | |
1670 | } | |
1671 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1672 | ||
34816ad9 | 1673 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1674 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1675 | if (!ret) | |
1676 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1677 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1678 | ||
1679 | if (ret) | |
1680 | cm_process_work(cm_id_priv, work); | |
1681 | else | |
1682 | cm_deref_id(cm_id_priv); | |
1683 | return 0; | |
1684 | out: | |
1685 | cm_deref_id(cm_id_priv); | |
1686 | return -EINVAL; | |
1687 | } | |
1688 | ||
1689 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1690 | struct cm_id_private *cm_id_priv, | |
1691 | const void *private_data, | |
1692 | u8 private_data_len) | |
1693 | { | |
1694 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1695 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1696 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1697 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1698 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1699 | ||
1700 | if (private_data && private_data_len) | |
1701 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1702 | } | |
1703 | ||
1704 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1705 | const void *private_data, | |
1706 | u8 private_data_len) | |
1707 | { | |
1708 | struct cm_id_private *cm_id_priv; | |
1709 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1710 | unsigned long flags; |
1711 | int ret; | |
1712 | ||
1713 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1714 | return -EINVAL; | |
1715 | ||
1716 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1717 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1718 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1719 | ret = -EINVAL; | |
1720 | goto out; | |
1721 | } | |
1722 | ||
1723 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1724 | if (ret) { | |
1725 | cm_enter_timewait(cm_id_priv); | |
1726 | goto out; | |
1727 | } | |
1728 | ||
1729 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1730 | private_data, private_data_len); | |
34816ad9 | 1731 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1732 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
1733 | ||
34816ad9 | 1734 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1735 | if (ret) { |
1736 | cm_enter_timewait(cm_id_priv); | |
1737 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1738 | cm_free_msg(msg); | |
1739 | return ret; | |
1740 | } | |
1741 | ||
1742 | cm_id->state = IB_CM_DREQ_SENT; | |
1743 | cm_id_priv->msg = msg; | |
1744 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1745 | return ret; | |
1746 | } | |
1747 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1748 | ||
1749 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1750 | struct cm_id_private *cm_id_priv, | |
1751 | const void *private_data, | |
1752 | u8 private_data_len) | |
1753 | { | |
1754 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1755 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1756 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1757 | ||
1758 | if (private_data && private_data_len) | |
1759 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
1760 | } | |
1761 | ||
1762 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
1763 | const void *private_data, | |
1764 | u8 private_data_len) | |
1765 | { | |
1766 | struct cm_id_private *cm_id_priv; | |
1767 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1768 | unsigned long flags; |
1769 | void *data; | |
1770 | int ret; | |
1771 | ||
1772 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
1773 | return -EINVAL; | |
1774 | ||
1775 | data = cm_copy_private_data(private_data, private_data_len); | |
1776 | if (IS_ERR(data)) | |
1777 | return PTR_ERR(data); | |
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_DREQ_RCVD) { | |
1782 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1783 | kfree(data); | |
1784 | return -EINVAL; | |
1785 | } | |
1786 | ||
1787 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1788 | cm_enter_timewait(cm_id_priv); | |
1789 | ||
1790 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1791 | if (ret) | |
1792 | goto out; | |
1793 | ||
1794 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1795 | private_data, private_data_len); | |
1796 | ||
34816ad9 | 1797 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1798 | if (ret) { |
1799 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1800 | cm_free_msg(msg); | |
1801 | return ret; | |
1802 | } | |
1803 | ||
1804 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1805 | return ret; | |
1806 | } | |
1807 | EXPORT_SYMBOL(ib_send_cm_drep); | |
1808 | ||
1809 | static int cm_dreq_handler(struct cm_work *work) | |
1810 | { | |
1811 | struct cm_id_private *cm_id_priv; | |
1812 | struct cm_dreq_msg *dreq_msg; | |
1813 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1814 | unsigned long flags; |
1815 | int ret; | |
1816 | ||
1817 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
1818 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
1819 | dreq_msg->local_comm_id); | |
1820 | if (!cm_id_priv) | |
1821 | return -EINVAL; | |
1822 | ||
1823 | work->cm_event.private_data = &dreq_msg->private_data; | |
1824 | ||
1825 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1826 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) | |
1827 | goto unlock; | |
1828 | ||
1829 | switch (cm_id_priv->id.state) { | |
1830 | case IB_CM_REP_SENT: | |
1831 | case IB_CM_DREQ_SENT: | |
34816ad9 | 1832 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1833 | break; |
1834 | case IB_CM_ESTABLISHED: | |
1835 | case IB_CM_MRA_REP_RCVD: | |
1836 | break; | |
1837 | case IB_CM_TIMEWAIT: | |
1838 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
1839 | goto unlock; | |
1840 | ||
1841 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1842 | cm_id_priv->private_data, | |
1843 | cm_id_priv->private_data_len); | |
1844 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1845 | ||
34816ad9 | 1846 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
1847 | cm_free_msg(msg); |
1848 | goto deref; | |
1849 | default: | |
1850 | goto unlock; | |
1851 | } | |
1852 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
1853 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
1854 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1855 | if (!ret) | |
1856 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1857 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1858 | ||
1859 | if (ret) | |
1860 | cm_process_work(cm_id_priv, work); | |
1861 | else | |
1862 | cm_deref_id(cm_id_priv); | |
1863 | return 0; | |
1864 | ||
1865 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1866 | deref: cm_deref_id(cm_id_priv); | |
1867 | return -EINVAL; | |
1868 | } | |
1869 | ||
1870 | static int cm_drep_handler(struct cm_work *work) | |
1871 | { | |
1872 | struct cm_id_private *cm_id_priv; | |
1873 | struct cm_drep_msg *drep_msg; | |
1874 | unsigned long flags; | |
1875 | int ret; | |
1876 | ||
1877 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1878 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
1879 | drep_msg->local_comm_id); | |
1880 | if (!cm_id_priv) | |
1881 | return -EINVAL; | |
1882 | ||
1883 | work->cm_event.private_data = &drep_msg->private_data; | |
1884 | ||
1885 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1886 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && | |
1887 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
1888 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1889 | goto out; | |
1890 | } | |
1891 | cm_enter_timewait(cm_id_priv); | |
1892 | ||
34816ad9 | 1893 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1894 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1895 | if (!ret) | |
1896 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1897 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1898 | ||
1899 | if (ret) | |
1900 | cm_process_work(cm_id_priv, work); | |
1901 | else | |
1902 | cm_deref_id(cm_id_priv); | |
1903 | return 0; | |
1904 | out: | |
1905 | cm_deref_id(cm_id_priv); | |
1906 | return -EINVAL; | |
1907 | } | |
1908 | ||
1909 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
1910 | enum ib_cm_rej_reason reason, | |
1911 | void *ari, | |
1912 | u8 ari_length, | |
1913 | const void *private_data, | |
1914 | u8 private_data_len) | |
1915 | { | |
1916 | struct cm_id_private *cm_id_priv; | |
1917 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1918 | unsigned long flags; |
1919 | int ret; | |
1920 | ||
1921 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
1922 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
1923 | return -EINVAL; | |
1924 | ||
1925 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1926 | ||
1927 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1928 | switch (cm_id->state) { | |
1929 | case IB_CM_REQ_SENT: | |
1930 | case IB_CM_MRA_REQ_RCVD: | |
1931 | case IB_CM_REQ_RCVD: | |
1932 | case IB_CM_MRA_REQ_SENT: | |
1933 | case IB_CM_REP_RCVD: | |
1934 | case IB_CM_MRA_REP_SENT: | |
1935 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1936 | if (!ret) | |
1937 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
1938 | cm_id_priv, reason, ari, ari_length, | |
1939 | private_data, private_data_len); | |
1940 | ||
1941 | cm_reset_to_idle(cm_id_priv); | |
1942 | break; | |
1943 | case IB_CM_REP_SENT: | |
1944 | case IB_CM_MRA_REP_RCVD: | |
1945 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1946 | if (!ret) | |
1947 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
1948 | cm_id_priv, reason, ari, ari_length, | |
1949 | private_data, private_data_len); | |
1950 | ||
1951 | cm_enter_timewait(cm_id_priv); | |
1952 | break; | |
1953 | default: | |
1954 | ret = -EINVAL; | |
1955 | goto out; | |
1956 | } | |
1957 | ||
1958 | if (ret) | |
1959 | goto out; | |
1960 | ||
34816ad9 | 1961 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1962 | if (ret) |
1963 | cm_free_msg(msg); | |
1964 | ||
1965 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1966 | return ret; | |
1967 | } | |
1968 | EXPORT_SYMBOL(ib_send_cm_rej); | |
1969 | ||
1970 | static void cm_format_rej_event(struct cm_work *work) | |
1971 | { | |
1972 | struct cm_rej_msg *rej_msg; | |
1973 | struct ib_cm_rej_event_param *param; | |
1974 | ||
1975 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
1976 | param = &work->cm_event.param.rej_rcvd; | |
1977 | param->ari = rej_msg->ari; | |
1978 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 1979 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
1980 | work->cm_event.private_data = &rej_msg->private_data; |
1981 | } | |
1982 | ||
1983 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
1984 | { | |
1985 | struct cm_timewait_info *timewait_info; | |
1986 | struct cm_id_private *cm_id_priv; | |
1987 | unsigned long flags; | |
97f52eb4 | 1988 | __be32 remote_id; |
a977049d HR |
1989 | |
1990 | remote_id = rej_msg->local_comm_id; | |
1991 | ||
97f52eb4 | 1992 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
a977049d | 1993 | spin_lock_irqsave(&cm.lock, flags); |
97f52eb4 | 1994 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
1995 | remote_id); |
1996 | if (!timewait_info) { | |
1997 | spin_unlock_irqrestore(&cm.lock, flags); | |
1998 | return NULL; | |
1999 | } | |
2000 | cm_id_priv = idr_find(&cm.local_id_table, | |
97f52eb4 | 2001 | (__force int) timewait_info->work.local_id); |
a977049d HR |
2002 | if (cm_id_priv) { |
2003 | if (cm_id_priv->id.remote_id == remote_id) | |
2004 | atomic_inc(&cm_id_priv->refcount); | |
2005 | else | |
2006 | cm_id_priv = NULL; | |
2007 | } | |
2008 | spin_unlock_irqrestore(&cm.lock, flags); | |
2009 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) | |
2010 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2011 | else | |
2012 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2013 | ||
2014 | return cm_id_priv; | |
2015 | } | |
2016 | ||
2017 | static int cm_rej_handler(struct cm_work *work) | |
2018 | { | |
2019 | struct cm_id_private *cm_id_priv; | |
2020 | struct cm_rej_msg *rej_msg; | |
2021 | unsigned long flags; | |
2022 | int ret; | |
2023 | ||
2024 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2025 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2026 | if (!cm_id_priv) | |
2027 | return -EINVAL; | |
2028 | ||
2029 | cm_format_rej_event(work); | |
2030 | ||
2031 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2032 | switch (cm_id_priv->id.state) { | |
2033 | case IB_CM_REQ_SENT: | |
2034 | case IB_CM_MRA_REQ_RCVD: | |
2035 | case IB_CM_REP_SENT: | |
2036 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2037 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2038 | /* fall through */ |
2039 | case IB_CM_REQ_RCVD: | |
2040 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2041 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2042 | cm_enter_timewait(cm_id_priv); |
2043 | else | |
2044 | cm_reset_to_idle(cm_id_priv); | |
2045 | break; | |
2046 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2047 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2048 | /* fall through */ |
2049 | case IB_CM_REP_RCVD: | |
2050 | case IB_CM_MRA_REP_SENT: | |
2051 | case IB_CM_ESTABLISHED: | |
2052 | cm_enter_timewait(cm_id_priv); | |
2053 | break; | |
2054 | default: | |
2055 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2056 | ret = -EINVAL; | |
2057 | goto out; | |
2058 | } | |
2059 | ||
2060 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2061 | if (!ret) | |
2062 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2063 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2064 | ||
2065 | if (ret) | |
2066 | cm_process_work(cm_id_priv, work); | |
2067 | else | |
2068 | cm_deref_id(cm_id_priv); | |
2069 | return 0; | |
2070 | out: | |
2071 | cm_deref_id(cm_id_priv); | |
2072 | return -EINVAL; | |
2073 | } | |
2074 | ||
2075 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2076 | u8 service_timeout, | |
2077 | const void *private_data, | |
2078 | u8 private_data_len) | |
2079 | { | |
2080 | struct cm_id_private *cm_id_priv; | |
2081 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2082 | void *data; |
2083 | unsigned long flags; | |
2084 | int ret; | |
2085 | ||
2086 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2087 | return -EINVAL; | |
2088 | ||
2089 | data = cm_copy_private_data(private_data, private_data_len); | |
2090 | if (IS_ERR(data)) | |
2091 | return PTR_ERR(data); | |
2092 | ||
2093 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2094 | ||
2095 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2096 | switch(cm_id_priv->id.state) { | |
2097 | case IB_CM_REQ_RCVD: | |
2098 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2099 | if (ret) | |
2100 | goto error1; | |
2101 | ||
2102 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2103 | CM_MSG_RESPONSE_REQ, service_timeout, | |
2104 | private_data, private_data_len); | |
34816ad9 | 2105 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2106 | if (ret) |
2107 | goto error2; | |
2108 | cm_id->state = IB_CM_MRA_REQ_SENT; | |
2109 | break; | |
2110 | case IB_CM_REP_RCVD: | |
2111 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2112 | if (ret) | |
2113 | goto error1; | |
2114 | ||
2115 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2116 | CM_MSG_RESPONSE_REP, service_timeout, | |
2117 | private_data, private_data_len); | |
34816ad9 | 2118 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2119 | if (ret) |
2120 | goto error2; | |
2121 | cm_id->state = IB_CM_MRA_REP_SENT; | |
2122 | break; | |
2123 | case IB_CM_ESTABLISHED: | |
2124 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2125 | if (ret) | |
2126 | goto error1; | |
2127 | ||
2128 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2129 | CM_MSG_RESPONSE_OTHER, service_timeout, | |
2130 | private_data, private_data_len); | |
34816ad9 | 2131 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2132 | if (ret) |
2133 | goto error2; | |
2134 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; | |
2135 | break; | |
2136 | default: | |
2137 | ret = -EINVAL; | |
2138 | goto error1; | |
2139 | } | |
2140 | cm_id_priv->service_timeout = service_timeout; | |
2141 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2142 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2143 | return 0; | |
2144 | ||
2145 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2146 | kfree(data); | |
2147 | return ret; | |
2148 | ||
2149 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2150 | kfree(data); | |
2151 | cm_free_msg(msg); | |
2152 | return ret; | |
2153 | } | |
2154 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2155 | ||
2156 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2157 | { | |
2158 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2159 | case CM_MSG_RESPONSE_REQ: | |
2160 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2161 | case CM_MSG_RESPONSE_REP: | |
2162 | case CM_MSG_RESPONSE_OTHER: | |
2163 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2164 | mra_msg->local_comm_id); | |
2165 | default: | |
2166 | return NULL; | |
2167 | } | |
2168 | } | |
2169 | ||
2170 | static int cm_mra_handler(struct cm_work *work) | |
2171 | { | |
2172 | struct cm_id_private *cm_id_priv; | |
2173 | struct cm_mra_msg *mra_msg; | |
2174 | unsigned long flags; | |
2175 | int timeout, ret; | |
2176 | ||
2177 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2178 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2179 | if (!cm_id_priv) | |
2180 | return -EINVAL; | |
2181 | ||
2182 | work->cm_event.private_data = &mra_msg->private_data; | |
2183 | work->cm_event.param.mra_rcvd.service_timeout = | |
2184 | cm_mra_get_service_timeout(mra_msg); | |
2185 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
2186 | cm_convert_to_ms(cm_id_priv->av.packet_life_time); | |
2187 | ||
2188 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2189 | switch (cm_id_priv->id.state) { | |
2190 | case IB_CM_REQ_SENT: | |
2191 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2192 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2193 | cm_id_priv->msg, timeout)) |
a977049d HR |
2194 | goto out; |
2195 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2196 | break; | |
2197 | case IB_CM_REP_SENT: | |
2198 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2199 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2200 | cm_id_priv->msg, timeout)) |
a977049d HR |
2201 | goto out; |
2202 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2203 | break; | |
2204 | case IB_CM_ESTABLISHED: | |
2205 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2206 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2207 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2208 | cm_id_priv->msg, timeout)) |
a977049d HR |
2209 | goto out; |
2210 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; | |
2211 | break; | |
2212 | default: | |
2213 | goto out; | |
2214 | } | |
2215 | ||
2216 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2217 | cm_id_priv->id.state; | |
2218 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2219 | if (!ret) | |
2220 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2221 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2222 | ||
2223 | if (ret) | |
2224 | cm_process_work(cm_id_priv, work); | |
2225 | else | |
2226 | cm_deref_id(cm_id_priv); | |
2227 | return 0; | |
2228 | out: | |
2229 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2230 | cm_deref_id(cm_id_priv); | |
2231 | return -EINVAL; | |
2232 | } | |
2233 | ||
2234 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2235 | struct cm_id_private *cm_id_priv, | |
2236 | struct ib_sa_path_rec *alternate_path, | |
2237 | const void *private_data, | |
2238 | u8 private_data_len) | |
2239 | { | |
2240 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2241 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2242 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2243 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2244 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2245 | /* todo: need remote CM response timeout */ | |
2246 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2247 | lap_msg->alt_local_lid = alternate_path->slid; | |
2248 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2249 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2250 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2251 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2252 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2253 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2254 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2255 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2256 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2257 | cm_lap_set_local_ack_timeout(lap_msg, | |
2258 | min(31, alternate_path->packet_life_time + 1)); | |
2259 | ||
2260 | if (private_data && private_data_len) | |
2261 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2262 | } | |
2263 | ||
2264 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2265 | struct ib_sa_path_rec *alternate_path, | |
2266 | const void *private_data, | |
2267 | u8 private_data_len) | |
2268 | { | |
2269 | struct cm_id_private *cm_id_priv; | |
2270 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2271 | unsigned long flags; |
2272 | int ret; | |
2273 | ||
2274 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2275 | return -EINVAL; | |
2276 | ||
2277 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2278 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2279 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2280 | cm_id->lap_state != IB_CM_LAP_IDLE) { | |
2281 | ret = -EINVAL; | |
2282 | goto out; | |
2283 | } | |
2284 | ||
2285 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2286 | if (ret) | |
2287 | goto out; | |
2288 | ||
2289 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2290 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2291 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2292 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2293 | ||
34816ad9 | 2294 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2295 | if (ret) { |
2296 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2297 | cm_free_msg(msg); | |
2298 | return ret; | |
2299 | } | |
2300 | ||
2301 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2302 | cm_id_priv->msg = msg; | |
2303 | ||
2304 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2305 | return ret; | |
2306 | } | |
2307 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2308 | ||
2309 | static void cm_format_path_from_lap(struct ib_sa_path_rec *path, | |
2310 | struct cm_lap_msg *lap_msg) | |
2311 | { | |
2312 | memset(path, 0, sizeof *path); | |
2313 | path->dgid = lap_msg->alt_local_gid; | |
2314 | path->sgid = lap_msg->alt_remote_gid; | |
2315 | path->dlid = lap_msg->alt_local_lid; | |
2316 | path->slid = lap_msg->alt_remote_lid; | |
2317 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2318 | path->hop_limit = lap_msg->alt_hop_limit; | |
2319 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2320 | path->reversible = 1; | |
2321 | /* pkey is same as in REQ */ | |
2322 | path->sl = cm_lap_get_sl(lap_msg); | |
2323 | path->mtu_selector = IB_SA_EQ; | |
2324 | /* mtu is same as in REQ */ | |
2325 | path->rate_selector = IB_SA_EQ; | |
2326 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2327 | path->packet_life_time_selector = IB_SA_EQ; | |
2328 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2329 | path->packet_life_time -= (path->packet_life_time > 0); | |
2330 | } | |
2331 | ||
2332 | static int cm_lap_handler(struct cm_work *work) | |
2333 | { | |
2334 | struct cm_id_private *cm_id_priv; | |
2335 | struct cm_lap_msg *lap_msg; | |
2336 | struct ib_cm_lap_event_param *param; | |
2337 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2338 | unsigned long flags; |
2339 | int ret; | |
2340 | ||
2341 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2342 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2343 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2344 | lap_msg->local_comm_id); | |
2345 | if (!cm_id_priv) | |
2346 | return -EINVAL; | |
2347 | ||
2348 | param = &work->cm_event.param.lap_rcvd; | |
2349 | param->alternate_path = &work->path[0]; | |
2350 | cm_format_path_from_lap(param->alternate_path, lap_msg); | |
2351 | work->cm_event.private_data = &lap_msg->private_data; | |
2352 | ||
2353 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2354 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) | |
2355 | goto unlock; | |
2356 | ||
2357 | switch (cm_id_priv->id.lap_state) { | |
2358 | case IB_CM_LAP_IDLE: | |
2359 | break; | |
2360 | case IB_CM_MRA_LAP_SENT: | |
2361 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
2362 | goto unlock; | |
2363 | ||
2364 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2365 | CM_MSG_RESPONSE_OTHER, | |
2366 | cm_id_priv->service_timeout, | |
2367 | cm_id_priv->private_data, | |
2368 | cm_id_priv->private_data_len); | |
2369 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2370 | ||
34816ad9 | 2371 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2372 | cm_free_msg(msg); |
2373 | goto deref; | |
2374 | default: | |
2375 | goto unlock; | |
2376 | } | |
2377 | ||
2378 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2379 | cm_id_priv->tid = lap_msg->hdr.tid; | |
2380 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2381 | if (!ret) | |
2382 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2383 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2384 | ||
2385 | if (ret) | |
2386 | cm_process_work(cm_id_priv, work); | |
2387 | else | |
2388 | cm_deref_id(cm_id_priv); | |
2389 | return 0; | |
2390 | ||
2391 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2392 | deref: cm_deref_id(cm_id_priv); | |
2393 | return -EINVAL; | |
2394 | } | |
2395 | ||
2396 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2397 | struct cm_id_private *cm_id_priv, | |
2398 | enum ib_cm_apr_status status, | |
2399 | void *info, | |
2400 | u8 info_length, | |
2401 | const void *private_data, | |
2402 | u8 private_data_len) | |
2403 | { | |
2404 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2405 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2406 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2407 | apr_msg->ap_status = (u8) status; | |
2408 | ||
2409 | if (info && info_length) { | |
2410 | apr_msg->info_length = info_length; | |
2411 | memcpy(apr_msg->info, info, info_length); | |
2412 | } | |
2413 | ||
2414 | if (private_data && private_data_len) | |
2415 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2416 | } | |
2417 | ||
2418 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2419 | enum ib_cm_apr_status status, | |
2420 | void *info, | |
2421 | u8 info_length, | |
2422 | const void *private_data, | |
2423 | u8 private_data_len) | |
2424 | { | |
2425 | struct cm_id_private *cm_id_priv; | |
2426 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2427 | unsigned long flags; |
2428 | int ret; | |
2429 | ||
2430 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2431 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2432 | return -EINVAL; | |
2433 | ||
2434 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2435 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2436 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2437 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2438 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2439 | ret = -EINVAL; | |
2440 | goto out; | |
2441 | } | |
2442 | ||
2443 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2444 | if (ret) | |
2445 | goto out; | |
2446 | ||
2447 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2448 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2449 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2450 | if (ret) { |
2451 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2452 | cm_free_msg(msg); | |
2453 | return ret; | |
2454 | } | |
2455 | ||
2456 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2457 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2458 | return ret; | |
2459 | } | |
2460 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2461 | ||
2462 | static int cm_apr_handler(struct cm_work *work) | |
2463 | { | |
2464 | struct cm_id_private *cm_id_priv; | |
2465 | struct cm_apr_msg *apr_msg; | |
2466 | unsigned long flags; | |
2467 | int ret; | |
2468 | ||
2469 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2470 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2471 | apr_msg->local_comm_id); | |
2472 | if (!cm_id_priv) | |
2473 | return -EINVAL; /* Unmatched reply. */ | |
2474 | ||
2475 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2476 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2477 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2478 | work->cm_event.private_data = &apr_msg->private_data; | |
2479 | ||
2480 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2481 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || | |
2482 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2483 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
2484 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2485 | goto out; | |
2486 | } | |
2487 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2488 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2489 | cm_id_priv->msg = NULL; |
2490 | ||
2491 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2492 | if (!ret) | |
2493 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2494 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2495 | ||
2496 | if (ret) | |
2497 | cm_process_work(cm_id_priv, work); | |
2498 | else | |
2499 | cm_deref_id(cm_id_priv); | |
2500 | return 0; | |
2501 | out: | |
2502 | cm_deref_id(cm_id_priv); | |
2503 | return -EINVAL; | |
2504 | } | |
2505 | ||
2506 | static int cm_timewait_handler(struct cm_work *work) | |
2507 | { | |
2508 | struct cm_timewait_info *timewait_info; | |
2509 | struct cm_id_private *cm_id_priv; | |
2510 | unsigned long flags; | |
2511 | int ret; | |
2512 | ||
2513 | timewait_info = (struct cm_timewait_info *)work; | |
2514 | cm_cleanup_timewait(timewait_info); | |
2515 | ||
2516 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2517 | timewait_info->work.remote_id); | |
2518 | if (!cm_id_priv) | |
2519 | return -EINVAL; | |
2520 | ||
2521 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2522 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || | |
2523 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
2524 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2525 | goto out; | |
2526 | } | |
2527 | cm_id_priv->id.state = IB_CM_IDLE; | |
2528 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2529 | if (!ret) | |
2530 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2531 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2532 | ||
2533 | if (ret) | |
2534 | cm_process_work(cm_id_priv, work); | |
2535 | else | |
2536 | cm_deref_id(cm_id_priv); | |
2537 | return 0; | |
2538 | out: | |
2539 | cm_deref_id(cm_id_priv); | |
2540 | return -EINVAL; | |
2541 | } | |
2542 | ||
2543 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2544 | struct cm_id_private *cm_id_priv, | |
2545 | struct ib_cm_sidr_req_param *param) | |
2546 | { | |
2547 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2548 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2549 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
97f52eb4 | 2550 | sidr_req_msg->pkey = cpu_to_be16(param->pkey); |
a977049d HR |
2551 | sidr_req_msg->service_id = param->service_id; |
2552 | ||
2553 | if (param->private_data && param->private_data_len) | |
2554 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2555 | param->private_data_len); | |
2556 | } | |
2557 | ||
2558 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2559 | struct ib_cm_sidr_req_param *param) | |
2560 | { | |
2561 | struct cm_id_private *cm_id_priv; | |
2562 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2563 | unsigned long flags; |
2564 | int ret; | |
2565 | ||
2566 | if (!param->path || (param->private_data && | |
2567 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2568 | return -EINVAL; | |
2569 | ||
2570 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2571 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2572 | if (ret) | |
2573 | goto out; | |
2574 | ||
2575 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2576 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2577 | cm_id_priv->timeout_ms = param->timeout_ms; |
2578 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2579 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2580 | if (ret) | |
2581 | goto out; | |
2582 | ||
2583 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2584 | param); | |
34816ad9 | 2585 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2586 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2587 | ||
2588 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2589 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2590 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2591 | else |
2592 | ret = -EINVAL; | |
2593 | ||
2594 | if (ret) { | |
2595 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2596 | cm_free_msg(msg); | |
2597 | goto out; | |
2598 | } | |
2599 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2600 | cm_id_priv->msg = msg; | |
2601 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2602 | out: | |
2603 | return ret; | |
2604 | } | |
2605 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2606 | ||
2607 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2608 | struct ib_cm_id *listen_id) | |
2609 | { | |
2610 | struct cm_sidr_req_msg *sidr_req_msg; | |
2611 | struct ib_cm_sidr_req_event_param *param; | |
2612 | ||
2613 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2614 | work->mad_recv_wc->recv_buf.mad; | |
2615 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2616 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2617 | param->listen_id = listen_id; |
a977049d HR |
2618 | param->port = work->port->port_num; |
2619 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2620 | } | |
2621 | ||
2622 | static int cm_sidr_req_handler(struct cm_work *work) | |
2623 | { | |
2624 | struct ib_cm_id *cm_id; | |
2625 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2626 | struct cm_sidr_req_msg *sidr_req_msg; | |
2627 | struct ib_wc *wc; | |
2628 | unsigned long flags; | |
2629 | ||
07d357d0 | 2630 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
2631 | if (IS_ERR(cm_id)) |
2632 | return PTR_ERR(cm_id); | |
2633 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2634 | ||
2635 | /* Record SGID/SLID and request ID for lookup. */ | |
2636 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2637 | work->mad_recv_wc->recv_buf.mad; | |
2638 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2639 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2640 | cm_id_priv->av.dgid.global.interface_id = 0; |
2641 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
2642 | &cm_id_priv->av); | |
2643 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
2644 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; | |
2645 | cm_id_priv->tid = sidr_req_msg->hdr.tid; | |
2646 | atomic_inc(&cm_id_priv->work_count); | |
2647 | ||
2648 | spin_lock_irqsave(&cm.lock, flags); | |
2649 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); | |
2650 | if (cur_cm_id_priv) { | |
2651 | spin_unlock_irqrestore(&cm.lock, flags); | |
2652 | goto out; /* Duplicate message. */ | |
2653 | } | |
07d357d0 SH |
2654 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
2655 | sidr_req_msg->service_id); | |
a977049d HR |
2656 | if (!cur_cm_id_priv) { |
2657 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2658 | spin_unlock_irqrestore(&cm.lock, flags); | |
2659 | /* todo: reply with no match */ | |
2660 | goto out; /* No match. */ | |
2661 | } | |
2662 | atomic_inc(&cur_cm_id_priv->refcount); | |
2663 | spin_unlock_irqrestore(&cm.lock, flags); | |
2664 | ||
2665 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2666 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2667 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2668 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2669 | |
2670 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2671 | cm_process_work(cm_id_priv, work); | |
2672 | cm_deref_id(cur_cm_id_priv); | |
2673 | return 0; | |
2674 | out: | |
2675 | ib_destroy_cm_id(&cm_id_priv->id); | |
2676 | return -EINVAL; | |
2677 | } | |
2678 | ||
2679 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2680 | struct cm_id_private *cm_id_priv, | |
2681 | struct ib_cm_sidr_rep_param *param) | |
2682 | { | |
2683 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2684 | cm_id_priv->tid); | |
2685 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2686 | sidr_rep_msg->status = param->status; | |
2687 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2688 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2689 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2690 | ||
2691 | if (param->info && param->info_length) | |
2692 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2693 | ||
2694 | if (param->private_data && param->private_data_len) | |
2695 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2696 | param->private_data_len); | |
2697 | } | |
2698 | ||
2699 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
2700 | struct ib_cm_sidr_rep_param *param) | |
2701 | { | |
2702 | struct cm_id_private *cm_id_priv; | |
2703 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2704 | unsigned long flags; |
2705 | int ret; | |
2706 | ||
2707 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
2708 | (param->private_data && | |
2709 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
2710 | return -EINVAL; | |
2711 | ||
2712 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2713 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2714 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
2715 | ret = -EINVAL; | |
2716 | goto error; | |
2717 | } | |
2718 | ||
2719 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2720 | if (ret) | |
2721 | goto error; | |
2722 | ||
2723 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
2724 | param); | |
34816ad9 | 2725 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2726 | if (ret) { |
2727 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2728 | cm_free_msg(msg); | |
2729 | return ret; | |
2730 | } | |
2731 | cm_id->state = IB_CM_IDLE; | |
2732 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2733 | ||
2734 | spin_lock_irqsave(&cm.lock, flags); | |
2735 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2736 | spin_unlock_irqrestore(&cm.lock, flags); | |
2737 | return 0; | |
2738 | ||
2739 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2740 | return ret; | |
2741 | } | |
2742 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
2743 | ||
2744 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
2745 | { | |
2746 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2747 | struct ib_cm_sidr_rep_event_param *param; | |
2748 | ||
2749 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2750 | work->mad_recv_wc->recv_buf.mad; | |
2751 | param = &work->cm_event.param.sidr_rep_rcvd; | |
2752 | param->status = sidr_rep_msg->status; | |
2753 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
2754 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
2755 | param->info = &sidr_rep_msg->info; | |
2756 | param->info_len = sidr_rep_msg->info_length; | |
2757 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
2758 | } | |
2759 | ||
2760 | static int cm_sidr_rep_handler(struct cm_work *work) | |
2761 | { | |
2762 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2763 | struct cm_id_private *cm_id_priv; | |
2764 | unsigned long flags; | |
2765 | ||
2766 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2767 | work->mad_recv_wc->recv_buf.mad; | |
2768 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
2769 | if (!cm_id_priv) | |
2770 | return -EINVAL; /* Unmatched reply. */ | |
2771 | ||
2772 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2773 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { | |
2774 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2775 | goto out; | |
2776 | } | |
2777 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 2778 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2779 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
2780 | ||
2781 | cm_format_sidr_rep_event(work); | |
2782 | cm_process_work(cm_id_priv, work); | |
2783 | return 0; | |
2784 | out: | |
2785 | cm_deref_id(cm_id_priv); | |
2786 | return -EINVAL; | |
2787 | } | |
2788 | ||
2789 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
2790 | enum ib_wc_status wc_status) | |
2791 | { | |
2792 | struct cm_id_private *cm_id_priv; | |
2793 | struct ib_cm_event cm_event; | |
2794 | enum ib_cm_state state; | |
2795 | unsigned long flags; | |
2796 | int ret; | |
2797 | ||
2798 | memset(&cm_event, 0, sizeof cm_event); | |
2799 | cm_id_priv = msg->context[0]; | |
2800 | ||
2801 | /* Discard old sends or ones without a response. */ | |
2802 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2803 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; | |
2804 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
2805 | goto discard; | |
2806 | ||
2807 | switch (state) { | |
2808 | case IB_CM_REQ_SENT: | |
2809 | case IB_CM_MRA_REQ_RCVD: | |
2810 | cm_reset_to_idle(cm_id_priv); | |
2811 | cm_event.event = IB_CM_REQ_ERROR; | |
2812 | break; | |
2813 | case IB_CM_REP_SENT: | |
2814 | case IB_CM_MRA_REP_RCVD: | |
2815 | cm_reset_to_idle(cm_id_priv); | |
2816 | cm_event.event = IB_CM_REP_ERROR; | |
2817 | break; | |
2818 | case IB_CM_DREQ_SENT: | |
2819 | cm_enter_timewait(cm_id_priv); | |
2820 | cm_event.event = IB_CM_DREQ_ERROR; | |
2821 | break; | |
2822 | case IB_CM_SIDR_REQ_SENT: | |
2823 | cm_id_priv->id.state = IB_CM_IDLE; | |
2824 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
2825 | break; | |
2826 | default: | |
2827 | goto discard; | |
2828 | } | |
2829 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2830 | cm_event.param.send_status = wc_status; | |
2831 | ||
2832 | /* No other events can occur on the cm_id at this point. */ | |
2833 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
2834 | cm_free_msg(msg); | |
2835 | if (ret) | |
2836 | ib_destroy_cm_id(&cm_id_priv->id); | |
2837 | return; | |
2838 | discard: | |
2839 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2840 | cm_free_msg(msg); | |
2841 | } | |
2842 | ||
2843 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
2844 | struct ib_mad_send_wc *mad_send_wc) | |
2845 | { | |
34816ad9 | 2846 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
a977049d HR |
2847 | |
2848 | switch (mad_send_wc->status) { | |
2849 | case IB_WC_SUCCESS: | |
2850 | case IB_WC_WR_FLUSH_ERR: | |
2851 | cm_free_msg(msg); | |
2852 | break; | |
2853 | default: | |
2854 | if (msg->context[0] && msg->context[1]) | |
2855 | cm_process_send_error(msg, mad_send_wc->status); | |
2856 | else | |
2857 | cm_free_msg(msg); | |
2858 | break; | |
2859 | } | |
2860 | } | |
2861 | ||
2862 | static void cm_work_handler(void *data) | |
2863 | { | |
2864 | struct cm_work *work = data; | |
2865 | int ret; | |
2866 | ||
2867 | switch (work->cm_event.event) { | |
2868 | case IB_CM_REQ_RECEIVED: | |
2869 | ret = cm_req_handler(work); | |
2870 | break; | |
2871 | case IB_CM_MRA_RECEIVED: | |
2872 | ret = cm_mra_handler(work); | |
2873 | break; | |
2874 | case IB_CM_REJ_RECEIVED: | |
2875 | ret = cm_rej_handler(work); | |
2876 | break; | |
2877 | case IB_CM_REP_RECEIVED: | |
2878 | ret = cm_rep_handler(work); | |
2879 | break; | |
2880 | case IB_CM_RTU_RECEIVED: | |
2881 | ret = cm_rtu_handler(work); | |
2882 | break; | |
2883 | case IB_CM_USER_ESTABLISHED: | |
2884 | ret = cm_establish_handler(work); | |
2885 | break; | |
2886 | case IB_CM_DREQ_RECEIVED: | |
2887 | ret = cm_dreq_handler(work); | |
2888 | break; | |
2889 | case IB_CM_DREP_RECEIVED: | |
2890 | ret = cm_drep_handler(work); | |
2891 | break; | |
2892 | case IB_CM_SIDR_REQ_RECEIVED: | |
2893 | ret = cm_sidr_req_handler(work); | |
2894 | break; | |
2895 | case IB_CM_SIDR_REP_RECEIVED: | |
2896 | ret = cm_sidr_rep_handler(work); | |
2897 | break; | |
2898 | case IB_CM_LAP_RECEIVED: | |
2899 | ret = cm_lap_handler(work); | |
2900 | break; | |
2901 | case IB_CM_APR_RECEIVED: | |
2902 | ret = cm_apr_handler(work); | |
2903 | break; | |
2904 | case IB_CM_TIMEWAIT_EXIT: | |
2905 | ret = cm_timewait_handler(work); | |
2906 | break; | |
2907 | default: | |
2908 | ret = -EINVAL; | |
2909 | break; | |
2910 | } | |
2911 | if (ret) | |
2912 | cm_free_work(work); | |
2913 | } | |
2914 | ||
2915 | int ib_cm_establish(struct ib_cm_id *cm_id) | |
2916 | { | |
2917 | struct cm_id_private *cm_id_priv; | |
2918 | struct cm_work *work; | |
2919 | unsigned long flags; | |
2920 | int ret = 0; | |
2921 | ||
2922 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
2923 | if (!work) | |
2924 | return -ENOMEM; | |
2925 | ||
2926 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2927 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2928 | switch (cm_id->state) | |
2929 | { | |
2930 | case IB_CM_REP_SENT: | |
2931 | case IB_CM_MRA_REP_RCVD: | |
2932 | cm_id->state = IB_CM_ESTABLISHED; | |
2933 | break; | |
2934 | case IB_CM_ESTABLISHED: | |
2935 | ret = -EISCONN; | |
2936 | break; | |
2937 | default: | |
2938 | ret = -EINVAL; | |
2939 | break; | |
2940 | } | |
2941 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2942 | ||
2943 | if (ret) { | |
2944 | kfree(work); | |
2945 | goto out; | |
2946 | } | |
2947 | ||
2948 | /* | |
2949 | * The CM worker thread may try to destroy the cm_id before it | |
2950 | * can execute this work item. To prevent potential deadlock, | |
2951 | * we need to find the cm_id once we're in the context of the | |
2952 | * worker thread, rather than holding a reference on it. | |
2953 | */ | |
2954 | INIT_WORK(&work->work, cm_work_handler, work); | |
2955 | work->local_id = cm_id->local_id; | |
2956 | work->remote_id = cm_id->remote_id; | |
2957 | work->mad_recv_wc = NULL; | |
2958 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
2959 | queue_work(cm.wq, &work->work); | |
2960 | out: | |
2961 | return ret; | |
2962 | } | |
2963 | EXPORT_SYMBOL(ib_cm_establish); | |
2964 | ||
2965 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
2966 | struct ib_mad_recv_wc *mad_recv_wc) | |
2967 | { | |
2968 | struct cm_work *work; | |
2969 | enum ib_cm_event_type event; | |
2970 | int paths = 0; | |
2971 | ||
2972 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
2973 | case CM_REQ_ATTR_ID: | |
2974 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
2975 | alt_local_lid != 0); | |
2976 | event = IB_CM_REQ_RECEIVED; | |
2977 | break; | |
2978 | case CM_MRA_ATTR_ID: | |
2979 | event = IB_CM_MRA_RECEIVED; | |
2980 | break; | |
2981 | case CM_REJ_ATTR_ID: | |
2982 | event = IB_CM_REJ_RECEIVED; | |
2983 | break; | |
2984 | case CM_REP_ATTR_ID: | |
2985 | event = IB_CM_REP_RECEIVED; | |
2986 | break; | |
2987 | case CM_RTU_ATTR_ID: | |
2988 | event = IB_CM_RTU_RECEIVED; | |
2989 | break; | |
2990 | case CM_DREQ_ATTR_ID: | |
2991 | event = IB_CM_DREQ_RECEIVED; | |
2992 | break; | |
2993 | case CM_DREP_ATTR_ID: | |
2994 | event = IB_CM_DREP_RECEIVED; | |
2995 | break; | |
2996 | case CM_SIDR_REQ_ATTR_ID: | |
2997 | event = IB_CM_SIDR_REQ_RECEIVED; | |
2998 | break; | |
2999 | case CM_SIDR_REP_ATTR_ID: | |
3000 | event = IB_CM_SIDR_REP_RECEIVED; | |
3001 | break; | |
3002 | case CM_LAP_ATTR_ID: | |
3003 | paths = 1; | |
3004 | event = IB_CM_LAP_RECEIVED; | |
3005 | break; | |
3006 | case CM_APR_ATTR_ID: | |
3007 | event = IB_CM_APR_RECEIVED; | |
3008 | break; | |
3009 | default: | |
3010 | ib_free_recv_mad(mad_recv_wc); | |
3011 | return; | |
3012 | } | |
3013 | ||
3014 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, | |
3015 | GFP_KERNEL); | |
3016 | if (!work) { | |
3017 | ib_free_recv_mad(mad_recv_wc); | |
3018 | return; | |
3019 | } | |
3020 | ||
3021 | INIT_WORK(&work->work, cm_work_handler, work); | |
3022 | work->cm_event.event = event; | |
3023 | work->mad_recv_wc = mad_recv_wc; | |
3024 | work->port = (struct cm_port *)mad_agent->context; | |
3025 | queue_work(cm.wq, &work->work); | |
3026 | } | |
3027 | ||
3028 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3029 | struct ib_qp_attr *qp_attr, | |
3030 | int *qp_attr_mask) | |
3031 | { | |
3032 | unsigned long flags; | |
3033 | int ret; | |
3034 | ||
3035 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3036 | switch (cm_id_priv->id.state) { | |
3037 | case IB_CM_REQ_SENT: | |
3038 | case IB_CM_MRA_REQ_RCVD: | |
3039 | case IB_CM_REQ_RCVD: | |
3040 | case IB_CM_MRA_REQ_SENT: | |
3041 | case IB_CM_REP_RCVD: | |
3042 | case IB_CM_MRA_REP_SENT: | |
3043 | case IB_CM_REP_SENT: | |
3044 | case IB_CM_MRA_REP_RCVD: | |
3045 | case IB_CM_ESTABLISHED: | |
3046 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3047 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
ae7971a7 SH |
3048 | qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE | |
3049 | IB_ACCESS_REMOTE_WRITE; | |
a977049d | 3050 | if (cm_id_priv->responder_resources) |
ae7971a7 | 3051 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ; |
a977049d HR |
3052 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3053 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3054 | ret = 0; | |
3055 | break; | |
3056 | default: | |
3057 | ret = -EINVAL; | |
3058 | break; | |
3059 | } | |
3060 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3061 | return ret; | |
3062 | } | |
3063 | ||
3064 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3065 | struct ib_qp_attr *qp_attr, | |
3066 | int *qp_attr_mask) | |
3067 | { | |
3068 | unsigned long flags; | |
3069 | int ret; | |
3070 | ||
3071 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3072 | switch (cm_id_priv->id.state) { | |
3073 | case IB_CM_REQ_RCVD: | |
3074 | case IB_CM_MRA_REQ_SENT: | |
3075 | case IB_CM_REP_RCVD: | |
3076 | case IB_CM_MRA_REP_SENT: | |
3077 | case IB_CM_REP_SENT: | |
3078 | case IB_CM_MRA_REP_RCVD: | |
3079 | case IB_CM_ESTABLISHED: | |
3080 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3081 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3082 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3083 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3084 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3085 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
ae7971a7 SH |
3086 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3087 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | | |
3088 | IB_QP_MIN_RNR_TIMER; | |
3089 | qp_attr->max_dest_rd_atomic = | |
3090 | cm_id_priv->responder_resources; | |
3091 | qp_attr->min_rnr_timer = 0; | |
3092 | } | |
a977049d HR |
3093 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3094 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
3095 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; | |
3096 | } | |
3097 | ret = 0; | |
3098 | break; | |
3099 | default: | |
3100 | ret = -EINVAL; | |
3101 | break; | |
3102 | } | |
3103 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3104 | return ret; | |
3105 | } | |
3106 | ||
3107 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3108 | struct ib_qp_attr *qp_attr, | |
3109 | int *qp_attr_mask) | |
3110 | { | |
3111 | unsigned long flags; | |
3112 | int ret; | |
3113 | ||
3114 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3115 | switch (cm_id_priv->id.state) { | |
3116 | case IB_CM_REP_RCVD: | |
3117 | case IB_CM_MRA_REP_SENT: | |
3118 | case IB_CM_REP_SENT: | |
3119 | case IB_CM_MRA_REP_RCVD: | |
3120 | case IB_CM_ESTABLISHED: | |
ae7971a7 | 3121 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; |
a977049d | 3122 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); |
ae7971a7 SH |
3123 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3124 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3125 | IB_QP_RNR_RETRY | | |
3126 | IB_QP_MAX_QP_RD_ATOMIC; | |
3127 | qp_attr->timeout = cm_id_priv->local_ack_timeout; | |
3128 | qp_attr->retry_cnt = cm_id_priv->retry_count; | |
3129 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3130 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; | |
3131 | } | |
a977049d HR |
3132 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3133 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3134 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3135 | } | |
3136 | ret = 0; | |
3137 | break; | |
3138 | default: | |
3139 | ret = -EINVAL; | |
3140 | break; | |
3141 | } | |
3142 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3143 | return ret; | |
3144 | } | |
3145 | ||
3146 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3147 | struct ib_qp_attr *qp_attr, | |
3148 | int *qp_attr_mask) | |
3149 | { | |
3150 | struct cm_id_private *cm_id_priv; | |
3151 | int ret; | |
3152 | ||
3153 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3154 | switch (qp_attr->qp_state) { | |
3155 | case IB_QPS_INIT: | |
3156 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3157 | break; | |
3158 | case IB_QPS_RTR: | |
3159 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3160 | break; | |
3161 | case IB_QPS_RTS: | |
3162 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3163 | break; | |
3164 | default: | |
3165 | ret = -EINVAL; | |
3166 | break; | |
3167 | } | |
3168 | return ret; | |
3169 | } | |
3170 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3171 | ||
a977049d HR |
3172 | static void cm_add_one(struct ib_device *device) |
3173 | { | |
3174 | struct cm_device *cm_dev; | |
3175 | struct cm_port *port; | |
3176 | struct ib_mad_reg_req reg_req = { | |
3177 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3178 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3179 | }; | |
3180 | struct ib_port_modify port_modify = { | |
3181 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3182 | }; | |
3183 | unsigned long flags; | |
3184 | int ret; | |
3185 | u8 i; | |
3186 | ||
3187 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * | |
3188 | device->phys_port_cnt, GFP_KERNEL); | |
3189 | if (!cm_dev) | |
3190 | return; | |
3191 | ||
3192 | cm_dev->device = device; | |
cf311cd4 | 3193 | cm_dev->ca_guid = device->node_guid; |
a977049d HR |
3194 | |
3195 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); | |
3196 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3197 | port = &cm_dev->port[i-1]; | |
3198 | port->cm_dev = cm_dev; | |
3199 | port->port_num = i; | |
3200 | port->mad_agent = ib_register_mad_agent(device, i, | |
3201 | IB_QPT_GSI, | |
3202 | ®_req, | |
3203 | 0, | |
3204 | cm_send_handler, | |
3205 | cm_recv_handler, | |
3206 | port); | |
3207 | if (IS_ERR(port->mad_agent)) | |
cf311cd4 | 3208 | goto error1; |
a977049d HR |
3209 | |
3210 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3211 | if (ret) | |
cf311cd4 | 3212 | goto error2; |
a977049d HR |
3213 | } |
3214 | ib_set_client_data(device, &cm_client, cm_dev); | |
3215 | ||
3216 | write_lock_irqsave(&cm.device_lock, flags); | |
3217 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3218 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3219 | return; | |
3220 | ||
a977049d | 3221 | error2: |
cf311cd4 SH |
3222 | ib_unregister_mad_agent(port->mad_agent); |
3223 | error1: | |
a977049d HR |
3224 | port_modify.set_port_cap_mask = 0; |
3225 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3226 | while (--i) { | |
3227 | port = &cm_dev->port[i-1]; | |
3228 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3229 | ib_unregister_mad_agent(port->mad_agent); | |
3230 | } | |
a977049d HR |
3231 | kfree(cm_dev); |
3232 | } | |
3233 | ||
3234 | static void cm_remove_one(struct ib_device *device) | |
3235 | { | |
3236 | struct cm_device *cm_dev; | |
3237 | struct cm_port *port; | |
3238 | struct ib_port_modify port_modify = { | |
3239 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3240 | }; | |
3241 | unsigned long flags; | |
3242 | int i; | |
3243 | ||
3244 | cm_dev = ib_get_client_data(device, &cm_client); | |
3245 | if (!cm_dev) | |
3246 | return; | |
3247 | ||
3248 | write_lock_irqsave(&cm.device_lock, flags); | |
3249 | list_del(&cm_dev->list); | |
3250 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3251 | ||
3252 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3253 | port = &cm_dev->port[i-1]; | |
3254 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3255 | ib_unregister_mad_agent(port->mad_agent); | |
3256 | } | |
3257 | kfree(cm_dev); | |
3258 | } | |
3259 | ||
3260 | static int __init ib_cm_init(void) | |
3261 | { | |
3262 | int ret; | |
3263 | ||
3264 | memset(&cm, 0, sizeof cm); | |
3265 | INIT_LIST_HEAD(&cm.device_list); | |
3266 | rwlock_init(&cm.device_lock); | |
3267 | spin_lock_init(&cm.lock); | |
3268 | cm.listen_service_table = RB_ROOT; | |
3269 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3270 | cm.remote_id_table = RB_ROOT; | |
3271 | cm.remote_qp_table = RB_ROOT; | |
3272 | cm.remote_sidr_table = RB_ROOT; | |
3273 | idr_init(&cm.local_id_table); | |
3274 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); | |
3275 | ||
3276 | cm.wq = create_workqueue("ib_cm"); | |
3277 | if (!cm.wq) | |
3278 | return -ENOMEM; | |
3279 | ||
3280 | ret = ib_register_client(&cm_client); | |
3281 | if (ret) | |
3282 | goto error; | |
3283 | ||
3284 | return 0; | |
3285 | error: | |
3286 | destroy_workqueue(cm.wq); | |
3287 | return ret; | |
3288 | } | |
3289 | ||
3290 | static void __exit ib_cm_cleanup(void) | |
3291 | { | |
3292 | flush_workqueue(cm.wq); | |
3293 | destroy_workqueue(cm.wq); | |
3294 | ib_unregister_client(&cm_client); | |
5d7edb3c | 3295 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3296 | } |
3297 | ||
3298 | module_init(ib_cm_init); | |
3299 | module_exit(ib_cm_cleanup); | |
3300 |