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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 | ||
46 | #include <ib_cache.h> | |
47 | #include <ib_cm.h> | |
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; | |
86 | u64 ca_guid; | |
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 */ | |
103 | u32 local_id; /* Established / timewait */ | |
104 | u32 remote_id; | |
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; | |
113 | u64 remote_ca_guid; | |
114 | u32 remote_qpn; | |
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; | |
124 | spinlock_t lock; | |
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; | |
135 | u64 tid; | |
136 | u32 local_qpn; | |
137 | u32 remote_qpn; | |
138 | u32 sq_psn; | |
139 | u32 rq_psn; | |
140 | int timeout_ms; | |
141 | enum ib_mtu path_mtu; | |
142 | u8 private_data_len; | |
143 | u8 max_cm_retries; | |
144 | u8 peer_to_peer; | |
145 | u8 responder_resources; | |
146 | u8 initiator_depth; | |
147 | u8 local_ack_timeout; | |
148 | u8 retry_count; | |
149 | u8 rnr_retry_count; | |
150 | u8 service_timeout; | |
151 | ||
152 | struct list_head work_list; | |
153 | atomic_t work_count; | |
154 | }; | |
155 | ||
156 | static void cm_work_handler(void *data); | |
157 | ||
158 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
159 | { | |
160 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
161 | wake_up(&cm_id_priv->wait); | |
162 | } | |
163 | ||
164 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
165 | struct ib_mad_send_buf **msg) | |
166 | { | |
167 | struct ib_mad_agent *mad_agent; | |
168 | struct ib_mad_send_buf *m; | |
169 | struct ib_ah *ah; | |
170 | ||
171 | mad_agent = cm_id_priv->av.port->mad_agent; | |
172 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
173 | if (IS_ERR(ah)) | |
174 | return PTR_ERR(ah); | |
175 | ||
176 | m = ib_create_send_mad(mad_agent, 1, cm_id_priv->av.pkey_index, | |
177 | ah, 0, sizeof(struct ib_mad_hdr), | |
178 | sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr), | |
179 | GFP_ATOMIC); | |
180 | if (IS_ERR(m)) { | |
181 | ib_destroy_ah(ah); | |
182 | return PTR_ERR(m); | |
183 | } | |
184 | ||
185 | /* Timeout set by caller if response is expected. */ | |
186 | m->send_wr.wr.ud.retries = cm_id_priv->max_cm_retries; | |
187 | ||
188 | atomic_inc(&cm_id_priv->refcount); | |
189 | m->context[0] = cm_id_priv; | |
190 | *msg = m; | |
191 | return 0; | |
192 | } | |
193 | ||
194 | static int cm_alloc_response_msg(struct cm_port *port, | |
195 | struct ib_mad_recv_wc *mad_recv_wc, | |
196 | struct ib_mad_send_buf **msg) | |
197 | { | |
198 | struct ib_mad_send_buf *m; | |
199 | struct ib_ah *ah; | |
200 | ||
201 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
202 | mad_recv_wc->recv_buf.grh, port->port_num); | |
203 | if (IS_ERR(ah)) | |
204 | return PTR_ERR(ah); | |
205 | ||
206 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
207 | ah, 0, sizeof(struct ib_mad_hdr), | |
208 | sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr), | |
209 | GFP_ATOMIC); | |
210 | if (IS_ERR(m)) { | |
211 | ib_destroy_ah(ah); | |
212 | return PTR_ERR(m); | |
213 | } | |
214 | *msg = m; | |
215 | return 0; | |
216 | } | |
217 | ||
218 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
219 | { | |
220 | ib_destroy_ah(msg->send_wr.wr.ud.ah); | |
221 | if (msg->context[0]) | |
222 | cm_deref_id(msg->context[0]); | |
223 | ib_free_send_mad(msg); | |
224 | } | |
225 | ||
226 | static void * cm_copy_private_data(const void *private_data, | |
227 | u8 private_data_len) | |
228 | { | |
229 | void *data; | |
230 | ||
231 | if (!private_data || !private_data_len) | |
232 | return NULL; | |
233 | ||
234 | data = kmalloc(private_data_len, GFP_KERNEL); | |
235 | if (!data) | |
236 | return ERR_PTR(-ENOMEM); | |
237 | ||
238 | memcpy(data, private_data, private_data_len); | |
239 | return data; | |
240 | } | |
241 | ||
242 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
243 | void *private_data, u8 private_data_len) | |
244 | { | |
245 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
246 | kfree(cm_id_priv->private_data); | |
247 | ||
248 | cm_id_priv->private_data = private_data; | |
249 | cm_id_priv->private_data_len = private_data_len; | |
250 | } | |
251 | ||
252 | static void cm_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num, | |
253 | u16 dlid, u8 sl, u16 src_path_bits) | |
254 | { | |
255 | memset(ah_attr, 0, sizeof ah_attr); | |
256 | ah_attr->dlid = be16_to_cpu(dlid); | |
257 | ah_attr->sl = sl; | |
258 | ah_attr->src_path_bits = src_path_bits; | |
259 | ah_attr->port_num = port_num; | |
260 | } | |
261 | ||
262 | static void cm_init_av_for_response(struct cm_port *port, | |
263 | struct ib_wc *wc, struct cm_av *av) | |
264 | { | |
265 | av->port = port; | |
266 | av->pkey_index = wc->pkey_index; | |
267 | cm_set_ah_attr(&av->ah_attr, port->port_num, cpu_to_be16(wc->slid), | |
268 | wc->sl, wc->dlid_path_bits); | |
269 | } | |
270 | ||
271 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
272 | { | |
273 | struct cm_device *cm_dev; | |
274 | struct cm_port *port = NULL; | |
275 | unsigned long flags; | |
276 | int ret; | |
277 | u8 p; | |
278 | ||
279 | read_lock_irqsave(&cm.device_lock, flags); | |
280 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
281 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, | |
282 | &p, NULL)) { | |
283 | port = &cm_dev->port[p-1]; | |
284 | break; | |
285 | } | |
286 | } | |
287 | read_unlock_irqrestore(&cm.device_lock, flags); | |
288 | ||
289 | if (!port) | |
290 | return -EINVAL; | |
291 | ||
292 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, | |
293 | be16_to_cpu(path->pkey), &av->pkey_index); | |
294 | if (ret) | |
295 | return ret; | |
296 | ||
297 | av->port = port; | |
298 | cm_set_ah_attr(&av->ah_attr, av->port->port_num, path->dlid, | |
299 | path->sl, path->slid & 0x7F); | |
300 | av->packet_life_time = path->packet_life_time; | |
301 | return 0; | |
302 | } | |
303 | ||
304 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
305 | { | |
306 | unsigned long flags; | |
307 | int ret; | |
308 | ||
309 | do { | |
310 | spin_lock_irqsave(&cm.lock, flags); | |
311 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 1, | |
312 | (int *) &cm_id_priv->id.local_id); | |
313 | spin_unlock_irqrestore(&cm.lock, flags); | |
314 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
315 | return ret; | |
316 | } | |
317 | ||
318 | static void cm_free_id(u32 local_id) | |
319 | { | |
320 | unsigned long flags; | |
321 | ||
322 | spin_lock_irqsave(&cm.lock, flags); | |
323 | idr_remove(&cm.local_id_table, (int) local_id); | |
324 | spin_unlock_irqrestore(&cm.lock, flags); | |
325 | } | |
326 | ||
327 | static struct cm_id_private * cm_get_id(u32 local_id, u32 remote_id) | |
328 | { | |
329 | struct cm_id_private *cm_id_priv; | |
330 | ||
331 | cm_id_priv = idr_find(&cm.local_id_table, (int) local_id); | |
332 | if (cm_id_priv) { | |
333 | if (cm_id_priv->id.remote_id == remote_id) | |
334 | atomic_inc(&cm_id_priv->refcount); | |
335 | else | |
336 | cm_id_priv = NULL; | |
337 | } | |
338 | ||
339 | return cm_id_priv; | |
340 | } | |
341 | ||
342 | static struct cm_id_private * cm_acquire_id(u32 local_id, u32 remote_id) | |
343 | { | |
344 | struct cm_id_private *cm_id_priv; | |
345 | unsigned long flags; | |
346 | ||
347 | spin_lock_irqsave(&cm.lock, flags); | |
348 | cm_id_priv = cm_get_id(local_id, remote_id); | |
349 | spin_unlock_irqrestore(&cm.lock, flags); | |
350 | ||
351 | return cm_id_priv; | |
352 | } | |
353 | ||
354 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) | |
355 | { | |
356 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
357 | struct rb_node *parent = NULL; | |
358 | struct cm_id_private *cur_cm_id_priv; | |
359 | u64 service_id = cm_id_priv->id.service_id; | |
360 | u64 service_mask = cm_id_priv->id.service_mask; | |
361 | ||
362 | while (*link) { | |
363 | parent = *link; | |
364 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
365 | service_node); | |
366 | if ((cur_cm_id_priv->id.service_mask & service_id) == | |
367 | (service_mask & cur_cm_id_priv->id.service_id)) | |
368 | return cm_id_priv; | |
369 | if (service_id < cur_cm_id_priv->id.service_id) | |
370 | link = &(*link)->rb_left; | |
371 | else | |
372 | link = &(*link)->rb_right; | |
373 | } | |
374 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
375 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
376 | return NULL; | |
377 | } | |
378 | ||
379 | static struct cm_id_private * cm_find_listen(u64 service_id) | |
380 | { | |
381 | struct rb_node *node = cm.listen_service_table.rb_node; | |
382 | struct cm_id_private *cm_id_priv; | |
383 | ||
384 | while (node) { | |
385 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
386 | if ((cm_id_priv->id.service_mask & service_id) == | |
387 | (cm_id_priv->id.service_mask & cm_id_priv->id.service_id)) | |
388 | return cm_id_priv; | |
389 | if (service_id < cm_id_priv->id.service_id) | |
390 | node = node->rb_left; | |
391 | else | |
392 | node = node->rb_right; | |
393 | } | |
394 | return NULL; | |
395 | } | |
396 | ||
397 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
398 | *timewait_info) | |
399 | { | |
400 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
401 | struct rb_node *parent = NULL; | |
402 | struct cm_timewait_info *cur_timewait_info; | |
403 | u64 remote_ca_guid = timewait_info->remote_ca_guid; | |
404 | u32 remote_id = timewait_info->work.remote_id; | |
405 | ||
406 | while (*link) { | |
407 | parent = *link; | |
408 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
409 | remote_id_node); | |
410 | if (remote_id < cur_timewait_info->work.remote_id) | |
411 | link = &(*link)->rb_left; | |
412 | else if (remote_id > cur_timewait_info->work.remote_id) | |
413 | link = &(*link)->rb_right; | |
414 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
415 | link = &(*link)->rb_left; | |
416 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
417 | link = &(*link)->rb_right; | |
418 | else | |
419 | return cur_timewait_info; | |
420 | } | |
421 | timewait_info->inserted_remote_id = 1; | |
422 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
423 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
424 | return NULL; | |
425 | } | |
426 | ||
427 | static struct cm_timewait_info * cm_find_remote_id(u64 remote_ca_guid, | |
428 | u32 remote_id) | |
429 | { | |
430 | struct rb_node *node = cm.remote_id_table.rb_node; | |
431 | struct cm_timewait_info *timewait_info; | |
432 | ||
433 | while (node) { | |
434 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
435 | remote_id_node); | |
436 | if (remote_id < timewait_info->work.remote_id) | |
437 | node = node->rb_left; | |
438 | else if (remote_id > timewait_info->work.remote_id) | |
439 | node = node->rb_right; | |
440 | else if (remote_ca_guid < timewait_info->remote_ca_guid) | |
441 | node = node->rb_left; | |
442 | else if (remote_ca_guid > timewait_info->remote_ca_guid) | |
443 | node = node->rb_right; | |
444 | else | |
445 | return timewait_info; | |
446 | } | |
447 | return NULL; | |
448 | } | |
449 | ||
450 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
451 | *timewait_info) | |
452 | { | |
453 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
454 | struct rb_node *parent = NULL; | |
455 | struct cm_timewait_info *cur_timewait_info; | |
456 | u64 remote_ca_guid = timewait_info->remote_ca_guid; | |
457 | u32 remote_qpn = timewait_info->remote_qpn; | |
458 | ||
459 | while (*link) { | |
460 | parent = *link; | |
461 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
462 | remote_qp_node); | |
463 | if (remote_qpn < cur_timewait_info->remote_qpn) | |
464 | link = &(*link)->rb_left; | |
465 | else if (remote_qpn > cur_timewait_info->remote_qpn) | |
466 | link = &(*link)->rb_right; | |
467 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
468 | link = &(*link)->rb_left; | |
469 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
470 | link = &(*link)->rb_right; | |
471 | else | |
472 | return cur_timewait_info; | |
473 | } | |
474 | timewait_info->inserted_remote_qp = 1; | |
475 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
476 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
477 | return NULL; | |
478 | } | |
479 | ||
480 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
481 | *cm_id_priv) | |
482 | { | |
483 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
484 | struct rb_node *parent = NULL; | |
485 | struct cm_id_private *cur_cm_id_priv; | |
486 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
487 | u32 remote_id = cm_id_priv->id.remote_id; | |
488 | ||
489 | while (*link) { | |
490 | parent = *link; | |
491 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
492 | sidr_id_node); | |
493 | if (remote_id < cur_cm_id_priv->id.remote_id) | |
494 | link = &(*link)->rb_left; | |
495 | else if (remote_id > cur_cm_id_priv->id.remote_id) | |
496 | link = &(*link)->rb_right; | |
497 | else { | |
498 | int cmp; | |
499 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
500 | sizeof *port_gid); | |
501 | if (cmp < 0) | |
502 | link = &(*link)->rb_left; | |
503 | else if (cmp > 0) | |
504 | link = &(*link)->rb_right; | |
505 | else | |
506 | return cur_cm_id_priv; | |
507 | } | |
508 | } | |
509 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
510 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
511 | return NULL; | |
512 | } | |
513 | ||
514 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
515 | enum ib_cm_sidr_status status) | |
516 | { | |
517 | struct ib_cm_sidr_rep_param param; | |
518 | ||
519 | memset(¶m, 0, sizeof param); | |
520 | param.status = status; | |
521 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
522 | } | |
523 | ||
524 | struct ib_cm_id *ib_create_cm_id(ib_cm_handler cm_handler, | |
525 | void *context) | |
526 | { | |
527 | struct cm_id_private *cm_id_priv; | |
528 | int ret; | |
529 | ||
530 | cm_id_priv = kmalloc(sizeof *cm_id_priv, GFP_KERNEL); | |
531 | if (!cm_id_priv) | |
532 | return ERR_PTR(-ENOMEM); | |
533 | ||
534 | memset(cm_id_priv, 0, sizeof *cm_id_priv); | |
535 | cm_id_priv->id.state = IB_CM_IDLE; | |
536 | cm_id_priv->id.cm_handler = cm_handler; | |
537 | cm_id_priv->id.context = context; | |
538 | ret = cm_alloc_id(cm_id_priv); | |
539 | if (ret) | |
540 | goto error; | |
541 | ||
542 | spin_lock_init(&cm_id_priv->lock); | |
543 | init_waitqueue_head(&cm_id_priv->wait); | |
544 | INIT_LIST_HEAD(&cm_id_priv->work_list); | |
545 | atomic_set(&cm_id_priv->work_count, -1); | |
546 | atomic_set(&cm_id_priv->refcount, 1); | |
547 | return &cm_id_priv->id; | |
548 | ||
549 | error: | |
550 | kfree(cm_id_priv); | |
551 | return ERR_PTR(-ENOMEM); | |
552 | } | |
553 | EXPORT_SYMBOL(ib_create_cm_id); | |
554 | ||
555 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
556 | { | |
557 | struct cm_work *work; | |
558 | ||
559 | if (list_empty(&cm_id_priv->work_list)) | |
560 | return NULL; | |
561 | ||
562 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
563 | list_del(&work->list); | |
564 | return work; | |
565 | } | |
566 | ||
567 | static void cm_free_work(struct cm_work *work) | |
568 | { | |
569 | if (work->mad_recv_wc) | |
570 | ib_free_recv_mad(work->mad_recv_wc); | |
571 | kfree(work); | |
572 | } | |
573 | ||
574 | static inline int cm_convert_to_ms(int iba_time) | |
575 | { | |
576 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
577 | return 1 << max(iba_time - 8, 0); | |
578 | } | |
579 | ||
580 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) | |
581 | { | |
582 | unsigned long flags; | |
583 | ||
584 | if (!timewait_info->inserted_remote_id && | |
585 | !timewait_info->inserted_remote_qp) | |
586 | return; | |
587 | ||
588 | spin_lock_irqsave(&cm.lock, flags); | |
589 | if (timewait_info->inserted_remote_id) { | |
590 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
591 | timewait_info->inserted_remote_id = 0; | |
592 | } | |
593 | ||
594 | if (timewait_info->inserted_remote_qp) { | |
595 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
596 | timewait_info->inserted_remote_qp = 0; | |
597 | } | |
598 | spin_unlock_irqrestore(&cm.lock, flags); | |
599 | } | |
600 | ||
601 | static struct cm_timewait_info * cm_create_timewait_info(u32 local_id) | |
602 | { | |
603 | struct cm_timewait_info *timewait_info; | |
604 | ||
605 | timewait_info = kmalloc(sizeof *timewait_info, GFP_KERNEL); | |
606 | if (!timewait_info) | |
607 | return ERR_PTR(-ENOMEM); | |
608 | memset(timewait_info, 0, sizeof *timewait_info); | |
609 | ||
610 | timewait_info->work.local_id = local_id; | |
611 | INIT_WORK(&timewait_info->work.work, cm_work_handler, | |
612 | &timewait_info->work); | |
613 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; | |
614 | return timewait_info; | |
615 | } | |
616 | ||
617 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
618 | { | |
619 | int wait_time; | |
620 | ||
621 | /* | |
622 | * The cm_id could be destroyed by the user before we exit timewait. | |
623 | * To protect against this, we search for the cm_id after exiting | |
624 | * timewait before notifying the user that we've exited timewait. | |
625 | */ | |
626 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
627 | wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout); | |
628 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
629 | msecs_to_jiffies(wait_time)); | |
630 | cm_id_priv->timewait_info = NULL; | |
631 | } | |
632 | ||
633 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
634 | { | |
635 | cm_id_priv->id.state = IB_CM_IDLE; | |
636 | if (cm_id_priv->timewait_info) { | |
637 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
638 | kfree(cm_id_priv->timewait_info); | |
639 | cm_id_priv->timewait_info = NULL; | |
640 | } | |
641 | } | |
642 | ||
643 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
644 | { | |
645 | struct cm_id_private *cm_id_priv; | |
646 | struct cm_work *work; | |
647 | unsigned long flags; | |
648 | ||
649 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
650 | retest: | |
651 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
652 | switch (cm_id->state) { | |
653 | case IB_CM_LISTEN: | |
654 | cm_id->state = IB_CM_IDLE; | |
655 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
656 | spin_lock_irqsave(&cm.lock, flags); | |
657 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); | |
658 | spin_unlock_irqrestore(&cm.lock, flags); | |
659 | break; | |
660 | case IB_CM_SIDR_REQ_SENT: | |
661 | cm_id->state = IB_CM_IDLE; | |
662 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
663 | (unsigned long) cm_id_priv->msg); | |
664 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
665 | break; | |
666 | case IB_CM_SIDR_REQ_RCVD: | |
667 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
668 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); | |
669 | break; | |
670 | case IB_CM_REQ_SENT: | |
671 | case IB_CM_MRA_REQ_RCVD: | |
672 | case IB_CM_REP_SENT: | |
673 | case IB_CM_MRA_REP_RCVD: | |
674 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
675 | (unsigned long) cm_id_priv->msg); | |
676 | /* Fall through */ | |
677 | case IB_CM_REQ_RCVD: | |
678 | case IB_CM_MRA_REQ_SENT: | |
679 | case IB_CM_REP_RCVD: | |
680 | case IB_CM_MRA_REP_SENT: | |
681 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
682 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, | |
683 | &cm_id_priv->av.port->cm_dev->ca_guid, | |
684 | sizeof cm_id_priv->av.port->cm_dev->ca_guid, | |
685 | NULL, 0); | |
686 | break; | |
687 | case IB_CM_ESTABLISHED: | |
688 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
689 | ib_send_cm_dreq(cm_id, NULL, 0); | |
690 | goto retest; | |
691 | case IB_CM_DREQ_SENT: | |
692 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
693 | (unsigned long) cm_id_priv->msg); | |
694 | cm_enter_timewait(cm_id_priv); | |
695 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
696 | break; | |
697 | case IB_CM_DREQ_RCVD: | |
698 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
699 | ib_send_cm_drep(cm_id, NULL, 0); | |
700 | break; | |
701 | default: | |
702 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
703 | break; | |
704 | } | |
705 | ||
706 | cm_free_id(cm_id->local_id); | |
707 | atomic_dec(&cm_id_priv->refcount); | |
708 | wait_event(cm_id_priv->wait, !atomic_read(&cm_id_priv->refcount)); | |
709 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) | |
710 | cm_free_work(work); | |
711 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
712 | kfree(cm_id_priv->private_data); | |
713 | kfree(cm_id_priv); | |
714 | } | |
715 | EXPORT_SYMBOL(ib_destroy_cm_id); | |
716 | ||
717 | int ib_cm_listen(struct ib_cm_id *cm_id, | |
718 | u64 service_id, | |
719 | u64 service_mask) | |
720 | { | |
721 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
722 | unsigned long flags; | |
723 | int ret = 0; | |
724 | ||
725 | service_mask = service_mask ? service_mask : ~0ULL; | |
726 | service_id &= service_mask; | |
727 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
728 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
729 | return -EINVAL; | |
730 | ||
731 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
732 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
733 | ||
734 | cm_id->state = IB_CM_LISTEN; | |
735 | ||
736 | spin_lock_irqsave(&cm.lock, flags); | |
737 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
738 | cm_id->service_id = __cpu_to_be64(cm.listen_service_id++); | |
739 | cm_id->service_mask = ~0ULL; | |
740 | } else { | |
741 | cm_id->service_id = service_id; | |
742 | cm_id->service_mask = service_mask; | |
743 | } | |
744 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
745 | spin_unlock_irqrestore(&cm.lock, flags); | |
746 | ||
747 | if (cur_cm_id_priv) { | |
748 | cm_id->state = IB_CM_IDLE; | |
749 | ret = -EBUSY; | |
750 | } | |
751 | return ret; | |
752 | } | |
753 | EXPORT_SYMBOL(ib_cm_listen); | |
754 | ||
755 | static u64 cm_form_tid(struct cm_id_private *cm_id_priv, | |
756 | enum cm_msg_sequence msg_seq) | |
757 | { | |
758 | u64 hi_tid, low_tid; | |
759 | ||
760 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
761 | low_tid = (u64) (cm_id_priv->id.local_id | (msg_seq << 30)); | |
762 | return cpu_to_be64(hi_tid | low_tid); | |
763 | } | |
764 | ||
765 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
766 | enum cm_msg_attr_id attr_id, u64 tid) | |
767 | { | |
768 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
769 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
770 | hdr->class_version = IB_CM_CLASS_VERSION; | |
771 | hdr->method = IB_MGMT_METHOD_SEND; | |
772 | hdr->attr_id = attr_id; | |
773 | hdr->tid = tid; | |
774 | } | |
775 | ||
776 | static void cm_format_req(struct cm_req_msg *req_msg, | |
777 | struct cm_id_private *cm_id_priv, | |
778 | struct ib_cm_req_param *param) | |
779 | { | |
780 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, | |
781 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
782 | ||
783 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
784 | req_msg->service_id = param->service_id; | |
785 | req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
786 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); | |
787 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
788 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
789 | cm_req_set_remote_resp_timeout(req_msg, | |
790 | param->remote_cm_response_timeout); | |
791 | cm_req_set_qp_type(req_msg, param->qp_type); | |
792 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
793 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
794 | cm_req_set_local_resp_timeout(req_msg, | |
795 | param->local_cm_response_timeout); | |
796 | cm_req_set_retry_count(req_msg, param->retry_count); | |
797 | req_msg->pkey = param->primary_path->pkey; | |
798 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
799 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
800 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
801 | cm_req_set_srq(req_msg, param->srq); | |
802 | ||
803 | req_msg->primary_local_lid = param->primary_path->slid; | |
804 | req_msg->primary_remote_lid = param->primary_path->dlid; | |
805 | req_msg->primary_local_gid = param->primary_path->sgid; | |
806 | req_msg->primary_remote_gid = param->primary_path->dgid; | |
807 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); | |
808 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); | |
809 | req_msg->primary_traffic_class = param->primary_path->traffic_class; | |
810 | req_msg->primary_hop_limit = param->primary_path->hop_limit; | |
811 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); | |
812 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ | |
813 | cm_req_set_primary_local_ack_timeout(req_msg, | |
814 | min(31, param->primary_path->packet_life_time + 1)); | |
815 | ||
816 | if (param->alternate_path) { | |
817 | req_msg->alt_local_lid = param->alternate_path->slid; | |
818 | req_msg->alt_remote_lid = param->alternate_path->dlid; | |
819 | req_msg->alt_local_gid = param->alternate_path->sgid; | |
820 | req_msg->alt_remote_gid = param->alternate_path->dgid; | |
821 | cm_req_set_alt_flow_label(req_msg, | |
822 | param->alternate_path->flow_label); | |
823 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); | |
824 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; | |
825 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; | |
826 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); | |
827 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ | |
828 | cm_req_set_alt_local_ack_timeout(req_msg, | |
829 | min(31, param->alternate_path->packet_life_time + 1)); | |
830 | } | |
831 | ||
832 | if (param->private_data && param->private_data_len) | |
833 | memcpy(req_msg->private_data, param->private_data, | |
834 | param->private_data_len); | |
835 | } | |
836 | ||
837 | static inline int cm_validate_req_param(struct ib_cm_req_param *param) | |
838 | { | |
839 | /* peer-to-peer not supported */ | |
840 | if (param->peer_to_peer) | |
841 | return -EINVAL; | |
842 | ||
843 | if (!param->primary_path) | |
844 | return -EINVAL; | |
845 | ||
846 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
847 | return -EINVAL; | |
848 | ||
849 | if (param->private_data && | |
850 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
851 | return -EINVAL; | |
852 | ||
853 | if (param->alternate_path && | |
854 | (param->alternate_path->pkey != param->primary_path->pkey || | |
855 | param->alternate_path->mtu != param->primary_path->mtu)) | |
856 | return -EINVAL; | |
857 | ||
858 | return 0; | |
859 | } | |
860 | ||
861 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
862 | struct ib_cm_req_param *param) | |
863 | { | |
864 | struct cm_id_private *cm_id_priv; | |
865 | struct ib_send_wr *bad_send_wr; | |
866 | struct cm_req_msg *req_msg; | |
867 | unsigned long flags; | |
868 | int ret; | |
869 | ||
870 | ret = cm_validate_req_param(param); | |
871 | if (ret) | |
872 | return ret; | |
873 | ||
874 | /* Verify that we're not in timewait. */ | |
875 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
876 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
877 | if (cm_id->state != IB_CM_IDLE) { | |
878 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
879 | ret = -EINVAL; | |
880 | goto out; | |
881 | } | |
882 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
883 | ||
884 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
885 | id.local_id); | |
886 | if (IS_ERR(cm_id_priv->timewait_info)) | |
887 | goto out; | |
888 | ||
889 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
890 | if (ret) | |
891 | goto error1; | |
892 | if (param->alternate_path) { | |
893 | ret = cm_init_av_by_path(param->alternate_path, | |
894 | &cm_id_priv->alt_av); | |
895 | if (ret) | |
896 | goto error1; | |
897 | } | |
898 | cm_id->service_id = param->service_id; | |
899 | cm_id->service_mask = ~0ULL; | |
900 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
901 | param->primary_path->packet_life_time) * 2 + | |
902 | cm_convert_to_ms( | |
903 | param->remote_cm_response_timeout); | |
904 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
905 | cm_id_priv->initiator_depth = param->initiator_depth; | |
906 | cm_id_priv->responder_resources = param->responder_resources; | |
907 | cm_id_priv->retry_count = param->retry_count; | |
908 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
909 | ||
910 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
911 | if (ret) | |
912 | goto error1; | |
913 | ||
914 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
915 | cm_format_req(req_msg, cm_id_priv, param); | |
916 | cm_id_priv->tid = req_msg->hdr.tid; | |
917 | cm_id_priv->msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
918 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; | |
919 | ||
920 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
921 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
922 | cm_id_priv->local_ack_timeout = | |
923 | cm_req_get_primary_local_ack_timeout(req_msg); | |
924 | ||
925 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
926 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
927 | &cm_id_priv->msg->send_wr, &bad_send_wr); | |
928 | if (ret) { | |
929 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
930 | goto error2; | |
931 | } | |
932 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
933 | cm_id->state = IB_CM_REQ_SENT; | |
934 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
935 | return 0; | |
936 | ||
937 | error2: cm_free_msg(cm_id_priv->msg); | |
938 | error1: kfree(cm_id_priv->timewait_info); | |
939 | out: return ret; | |
940 | } | |
941 | EXPORT_SYMBOL(ib_send_cm_req); | |
942 | ||
943 | static int cm_issue_rej(struct cm_port *port, | |
944 | struct ib_mad_recv_wc *mad_recv_wc, | |
945 | enum ib_cm_rej_reason reason, | |
946 | enum cm_msg_response msg_rejected, | |
947 | void *ari, u8 ari_length) | |
948 | { | |
949 | struct ib_mad_send_buf *msg = NULL; | |
950 | struct ib_send_wr *bad_send_wr; | |
951 | struct cm_rej_msg *rej_msg, *rcv_msg; | |
952 | int ret; | |
953 | ||
954 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
955 | if (ret) | |
956 | return ret; | |
957 | ||
958 | /* We just need common CM header information. Cast to any message. */ | |
959 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
960 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
961 | ||
962 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
963 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
964 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
965 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
966 | rej_msg->reason = reason; | |
967 | ||
968 | if (ari && ari_length) { | |
969 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
970 | memcpy(rej_msg->ari, ari, ari_length); | |
971 | } | |
972 | ||
973 | ret = ib_post_send_mad(port->mad_agent, &msg->send_wr, &bad_send_wr); | |
974 | if (ret) | |
975 | cm_free_msg(msg); | |
976 | ||
977 | return ret; | |
978 | } | |
979 | ||
980 | static inline int cm_is_active_peer(u64 local_ca_guid, u64 remote_ca_guid, | |
981 | u32 local_qpn, u32 remote_qpn) | |
982 | { | |
983 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
984 | ((local_ca_guid == remote_ca_guid) && | |
985 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
986 | } | |
987 | ||
988 | static inline void cm_format_paths_from_req(struct cm_req_msg *req_msg, | |
989 | struct ib_sa_path_rec *primary_path, | |
990 | struct ib_sa_path_rec *alt_path) | |
991 | { | |
992 | memset(primary_path, 0, sizeof *primary_path); | |
993 | primary_path->dgid = req_msg->primary_local_gid; | |
994 | primary_path->sgid = req_msg->primary_remote_gid; | |
995 | primary_path->dlid = req_msg->primary_local_lid; | |
996 | primary_path->slid = req_msg->primary_remote_lid; | |
997 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
998 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
999 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1000 | primary_path->reversible = 1; | |
1001 | primary_path->pkey = req_msg->pkey; | |
1002 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1003 | primary_path->mtu_selector = IB_SA_EQ; | |
1004 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1005 | primary_path->rate_selector = IB_SA_EQ; | |
1006 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1007 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1008 | primary_path->packet_life_time = | |
1009 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1010 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1011 | ||
1012 | if (req_msg->alt_local_lid) { | |
1013 | memset(alt_path, 0, sizeof *alt_path); | |
1014 | alt_path->dgid = req_msg->alt_local_gid; | |
1015 | alt_path->sgid = req_msg->alt_remote_gid; | |
1016 | alt_path->dlid = req_msg->alt_local_lid; | |
1017 | alt_path->slid = req_msg->alt_remote_lid; | |
1018 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1019 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1020 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1021 | alt_path->reversible = 1; | |
1022 | alt_path->pkey = req_msg->pkey; | |
1023 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1024 | alt_path->mtu_selector = IB_SA_EQ; | |
1025 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1026 | alt_path->rate_selector = IB_SA_EQ; | |
1027 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1028 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1029 | alt_path->packet_life_time = | |
1030 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1031 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | static void cm_format_req_event(struct cm_work *work, | |
1036 | struct cm_id_private *cm_id_priv, | |
1037 | struct ib_cm_id *listen_id) | |
1038 | { | |
1039 | struct cm_req_msg *req_msg; | |
1040 | struct ib_cm_req_event_param *param; | |
1041 | ||
1042 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1043 | param = &work->cm_event.param.req_rcvd; | |
1044 | param->listen_id = listen_id; | |
1045 | param->device = cm_id_priv->av.port->mad_agent->device; | |
1046 | param->port = cm_id_priv->av.port->port_num; | |
1047 | param->primary_path = &work->path[0]; | |
1048 | if (req_msg->alt_local_lid) | |
1049 | param->alternate_path = &work->path[1]; | |
1050 | else | |
1051 | param->alternate_path = NULL; | |
1052 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1053 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1054 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1055 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1056 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1057 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1058 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1059 | param->local_cm_response_timeout = | |
1060 | cm_req_get_remote_resp_timeout(req_msg); | |
1061 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1062 | param->remote_cm_response_timeout = | |
1063 | cm_req_get_local_resp_timeout(req_msg); | |
1064 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1065 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1066 | param->srq = cm_req_get_srq(req_msg); | |
1067 | work->cm_event.private_data = &req_msg->private_data; | |
1068 | } | |
1069 | ||
1070 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1071 | struct cm_work *work) | |
1072 | { | |
1073 | unsigned long flags; | |
1074 | int ret; | |
1075 | ||
1076 | /* We will typically only have the current event to report. */ | |
1077 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1078 | cm_free_work(work); | |
1079 | ||
1080 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
1081 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1082 | work = cm_dequeue_work(cm_id_priv); | |
1083 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1084 | BUG_ON(!work); | |
1085 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1086 | &work->cm_event); | |
1087 | cm_free_work(work); | |
1088 | } | |
1089 | cm_deref_id(cm_id_priv); | |
1090 | if (ret) | |
1091 | ib_destroy_cm_id(&cm_id_priv->id); | |
1092 | } | |
1093 | ||
1094 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1095 | struct cm_id_private *cm_id_priv, | |
1096 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1097 | const void *private_data, u8 private_data_len) | |
1098 | { | |
1099 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1100 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1101 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1102 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1103 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1104 | ||
1105 | if (private_data && private_data_len) | |
1106 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1107 | } | |
1108 | ||
1109 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1110 | struct cm_id_private *cm_id_priv, | |
1111 | enum ib_cm_rej_reason reason, | |
1112 | void *ari, | |
1113 | u8 ari_length, | |
1114 | const void *private_data, | |
1115 | u8 private_data_len) | |
1116 | { | |
1117 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1118 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1119 | ||
1120 | switch(cm_id_priv->id.state) { | |
1121 | case IB_CM_REQ_RCVD: | |
1122 | rej_msg->local_comm_id = 0; | |
1123 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1124 | break; | |
1125 | case IB_CM_MRA_REQ_SENT: | |
1126 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1127 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1128 | break; | |
1129 | case IB_CM_REP_RCVD: | |
1130 | case IB_CM_MRA_REP_SENT: | |
1131 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1132 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1133 | break; | |
1134 | default: | |
1135 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1136 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1137 | break; | |
1138 | } | |
1139 | ||
1140 | rej_msg->reason = reason; | |
1141 | if (ari && ari_length) { | |
1142 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1143 | memcpy(rej_msg->ari, ari, ari_length); | |
1144 | } | |
1145 | ||
1146 | if (private_data && private_data_len) | |
1147 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1148 | } | |
1149 | ||
1150 | static void cm_dup_req_handler(struct cm_work *work, | |
1151 | struct cm_id_private *cm_id_priv) | |
1152 | { | |
1153 | struct ib_mad_send_buf *msg = NULL; | |
1154 | struct ib_send_wr *bad_send_wr; | |
1155 | unsigned long flags; | |
1156 | int ret; | |
1157 | ||
1158 | /* Quick state check to discard duplicate REQs. */ | |
1159 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1160 | return; | |
1161 | ||
1162 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1163 | if (ret) | |
1164 | return; | |
1165 | ||
1166 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1167 | switch (cm_id_priv->id.state) { | |
1168 | case IB_CM_MRA_REQ_SENT: | |
1169 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1170 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1171 | cm_id_priv->private_data, | |
1172 | cm_id_priv->private_data_len); | |
1173 | break; | |
1174 | case IB_CM_TIMEWAIT: | |
1175 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1176 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1177 | break; | |
1178 | default: | |
1179 | goto unlock; | |
1180 | } | |
1181 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1182 | ||
1183 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr, | |
1184 | &bad_send_wr); | |
1185 | if (ret) | |
1186 | goto free; | |
1187 | return; | |
1188 | ||
1189 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1190 | free: cm_free_msg(msg); | |
1191 | } | |
1192 | ||
1193 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1194 | struct cm_id_private *cm_id_priv) | |
1195 | { | |
1196 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1197 | struct cm_timewait_info *timewait_info; | |
1198 | struct cm_req_msg *req_msg; | |
1199 | unsigned long flags; | |
1200 | ||
1201 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1202 | ||
1203 | /* Check for duplicate REQ and stale connections. */ | |
1204 | spin_lock_irqsave(&cm.lock, flags); | |
1205 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); | |
1206 | if (!timewait_info) | |
1207 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1208 | ||
1209 | if (timewait_info) { | |
1210 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1211 | timewait_info->work.remote_id); | |
1212 | spin_unlock_irqrestore(&cm.lock, flags); | |
1213 | if (cur_cm_id_priv) { | |
1214 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1215 | cm_deref_id(cur_cm_id_priv); | |
1216 | } else | |
1217 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1218 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1219 | NULL, 0); | |
1220 | goto error; | |
1221 | } | |
1222 | ||
1223 | /* Find matching listen request. */ | |
1224 | listen_cm_id_priv = cm_find_listen(req_msg->service_id); | |
1225 | if (!listen_cm_id_priv) { | |
1226 | spin_unlock_irqrestore(&cm.lock, flags); | |
1227 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1228 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1229 | NULL, 0); | |
1230 | goto error; | |
1231 | } | |
1232 | atomic_inc(&listen_cm_id_priv->refcount); | |
1233 | atomic_inc(&cm_id_priv->refcount); | |
1234 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1235 | atomic_inc(&cm_id_priv->work_count); | |
1236 | spin_unlock_irqrestore(&cm.lock, flags); | |
1237 | return listen_cm_id_priv; | |
1238 | ||
1239 | error: cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1240 | return NULL; | |
1241 | } | |
1242 | ||
1243 | static int cm_req_handler(struct cm_work *work) | |
1244 | { | |
1245 | struct ib_cm_id *cm_id; | |
1246 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1247 | struct cm_req_msg *req_msg; | |
1248 | int ret; | |
1249 | ||
1250 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1251 | ||
1252 | cm_id = ib_create_cm_id(NULL, NULL); | |
1253 | if (IS_ERR(cm_id)) | |
1254 | return PTR_ERR(cm_id); | |
1255 | ||
1256 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1257 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1258 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
1259 | &cm_id_priv->av); | |
1260 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1261 | id.local_id); | |
1262 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1263 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
1264 | goto error1; | |
1265 | } | |
1266 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1267 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1268 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1269 | ||
1270 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1271 | if (!listen_cm_id_priv) { | |
1272 | ret = -EINVAL; | |
1273 | goto error2; | |
1274 | } | |
1275 | ||
1276 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1277 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1278 | cm_id_priv->id.service_id = req_msg->service_id; | |
1279 | cm_id_priv->id.service_mask = ~0ULL; | |
1280 | ||
1281 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); | |
1282 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
1283 | if (ret) | |
1284 | goto error3; | |
1285 | if (req_msg->alt_local_lid) { | |
1286 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
1287 | if (ret) | |
1288 | goto error3; | |
1289 | } | |
1290 | cm_id_priv->tid = req_msg->hdr.tid; | |
1291 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1292 | cm_req_get_local_resp_timeout(req_msg)); | |
1293 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1294 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1295 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1296 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1297 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
1298 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); | |
1299 | cm_id_priv->local_ack_timeout = | |
1300 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1301 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); | |
1302 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1303 | ||
1304 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1305 | cm_process_work(cm_id_priv, work); | |
1306 | cm_deref_id(listen_cm_id_priv); | |
1307 | return 0; | |
1308 | ||
1309 | error3: atomic_dec(&cm_id_priv->refcount); | |
1310 | cm_deref_id(listen_cm_id_priv); | |
1311 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1312 | error2: kfree(cm_id_priv->timewait_info); | |
1313 | error1: ib_destroy_cm_id(&cm_id_priv->id); | |
1314 | return ret; | |
1315 | } | |
1316 | ||
1317 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1318 | struct cm_id_private *cm_id_priv, | |
1319 | struct ib_cm_rep_param *param) | |
1320 | { | |
1321 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1322 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1323 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1324 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1325 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1326 | rep_msg->resp_resources = param->responder_resources; | |
1327 | rep_msg->initiator_depth = param->initiator_depth; | |
1328 | cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); | |
1329 | cm_rep_set_failover(rep_msg, param->failover_accepted); | |
1330 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1331 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1332 | cm_rep_set_srq(rep_msg, param->srq); | |
1333 | rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
1334 | ||
1335 | if (param->private_data && param->private_data_len) | |
1336 | memcpy(rep_msg->private_data, param->private_data, | |
1337 | param->private_data_len); | |
1338 | } | |
1339 | ||
1340 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1341 | struct ib_cm_rep_param *param) | |
1342 | { | |
1343 | struct cm_id_private *cm_id_priv; | |
1344 | struct ib_mad_send_buf *msg; | |
1345 | struct cm_rep_msg *rep_msg; | |
1346 | struct ib_send_wr *bad_send_wr; | |
1347 | unsigned long flags; | |
1348 | int ret; | |
1349 | ||
1350 | if (param->private_data && | |
1351 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1352 | return -EINVAL; | |
1353 | ||
1354 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1355 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1356 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1357 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1358 | ret = -EINVAL; | |
1359 | goto out; | |
1360 | } | |
1361 | ||
1362 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1363 | if (ret) | |
1364 | goto out; | |
1365 | ||
1366 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1367 | cm_format_rep(rep_msg, cm_id_priv, param); | |
1368 | msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
1369 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; | |
1370 | ||
1371 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1372 | &msg->send_wr, &bad_send_wr); | |
1373 | if (ret) { | |
1374 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1375 | cm_free_msg(msg); | |
1376 | return ret; | |
1377 | } | |
1378 | ||
1379 | cm_id->state = IB_CM_REP_SENT; | |
1380 | cm_id_priv->msg = msg; | |
1381 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1382 | cm_id_priv->responder_resources = param->responder_resources; | |
1383 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1384 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1385 | ||
1386 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1387 | return ret; | |
1388 | } | |
1389 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1390 | ||
1391 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1392 | struct cm_id_private *cm_id_priv, | |
1393 | const void *private_data, | |
1394 | u8 private_data_len) | |
1395 | { | |
1396 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1397 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1398 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1399 | ||
1400 | if (private_data && private_data_len) | |
1401 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1402 | } | |
1403 | ||
1404 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1405 | const void *private_data, | |
1406 | u8 private_data_len) | |
1407 | { | |
1408 | struct cm_id_private *cm_id_priv; | |
1409 | struct ib_mad_send_buf *msg; | |
1410 | struct ib_send_wr *bad_send_wr; | |
1411 | unsigned long flags; | |
1412 | void *data; | |
1413 | int ret; | |
1414 | ||
1415 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1416 | return -EINVAL; | |
1417 | ||
1418 | data = cm_copy_private_data(private_data, private_data_len); | |
1419 | if (IS_ERR(data)) | |
1420 | return PTR_ERR(data); | |
1421 | ||
1422 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1423 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1424 | if (cm_id->state != IB_CM_REP_RCVD && | |
1425 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1426 | ret = -EINVAL; | |
1427 | goto error; | |
1428 | } | |
1429 | ||
1430 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1431 | if (ret) | |
1432 | goto error; | |
1433 | ||
1434 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1435 | private_data, private_data_len); | |
1436 | ||
1437 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1438 | &msg->send_wr, &bad_send_wr); | |
1439 | if (ret) { | |
1440 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1441 | cm_free_msg(msg); | |
1442 | kfree(data); | |
1443 | return ret; | |
1444 | } | |
1445 | ||
1446 | cm_id->state = IB_CM_ESTABLISHED; | |
1447 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1448 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1449 | return 0; | |
1450 | ||
1451 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1452 | kfree(data); | |
1453 | return ret; | |
1454 | } | |
1455 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1456 | ||
1457 | static void cm_format_rep_event(struct cm_work *work) | |
1458 | { | |
1459 | struct cm_rep_msg *rep_msg; | |
1460 | struct ib_cm_rep_event_param *param; | |
1461 | ||
1462 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1463 | param = &work->cm_event.param.rep_rcvd; | |
1464 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1465 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1466 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1467 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1468 | param->responder_resources = rep_msg->initiator_depth; | |
1469 | param->initiator_depth = rep_msg->resp_resources; | |
1470 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1471 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1472 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1473 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1474 | param->srq = cm_rep_get_srq(rep_msg); | |
1475 | work->cm_event.private_data = &rep_msg->private_data; | |
1476 | } | |
1477 | ||
1478 | static void cm_dup_rep_handler(struct cm_work *work) | |
1479 | { | |
1480 | struct cm_id_private *cm_id_priv; | |
1481 | struct cm_rep_msg *rep_msg; | |
1482 | struct ib_mad_send_buf *msg = NULL; | |
1483 | struct ib_send_wr *bad_send_wr; | |
1484 | unsigned long flags; | |
1485 | int ret; | |
1486 | ||
1487 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1488 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1489 | rep_msg->local_comm_id); | |
1490 | if (!cm_id_priv) | |
1491 | return; | |
1492 | ||
1493 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1494 | if (ret) | |
1495 | goto deref; | |
1496 | ||
1497 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1498 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) | |
1499 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1500 | cm_id_priv->private_data, | |
1501 | cm_id_priv->private_data_len); | |
1502 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1503 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1504 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1505 | cm_id_priv->private_data, | |
1506 | cm_id_priv->private_data_len); | |
1507 | else | |
1508 | goto unlock; | |
1509 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1510 | ||
1511 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr, | |
1512 | &bad_send_wr); | |
1513 | if (ret) | |
1514 | goto free; | |
1515 | goto deref; | |
1516 | ||
1517 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1518 | free: cm_free_msg(msg); | |
1519 | deref: cm_deref_id(cm_id_priv); | |
1520 | } | |
1521 | ||
1522 | static int cm_rep_handler(struct cm_work *work) | |
1523 | { | |
1524 | struct cm_id_private *cm_id_priv; | |
1525 | struct cm_rep_msg *rep_msg; | |
1526 | unsigned long flags; | |
1527 | int ret; | |
1528 | ||
1529 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1530 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1531 | if (!cm_id_priv) { | |
1532 | cm_dup_rep_handler(work); | |
1533 | return -EINVAL; | |
1534 | } | |
1535 | ||
1536 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; | |
1537 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1538 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1539 | ||
1540 | spin_lock_irqsave(&cm.lock, flags); | |
1541 | /* Check for duplicate REP. */ | |
1542 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
1543 | spin_unlock_irqrestore(&cm.lock, flags); | |
1544 | ret = -EINVAL; | |
1545 | goto error; | |
1546 | } | |
1547 | /* Check for a stale connection. */ | |
1548 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
1549 | spin_unlock_irqrestore(&cm.lock, flags); | |
1550 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1551 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1552 | NULL, 0); | |
1553 | ret = -EINVAL; | |
1554 | goto error; | |
1555 | } | |
1556 | spin_unlock_irqrestore(&cm.lock, flags); | |
1557 | ||
1558 | cm_format_rep_event(work); | |
1559 | ||
1560 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1561 | switch (cm_id_priv->id.state) { | |
1562 | case IB_CM_REQ_SENT: | |
1563 | case IB_CM_MRA_REQ_RCVD: | |
1564 | break; | |
1565 | default: | |
1566 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1567 | ret = -EINVAL; | |
1568 | goto error; | |
1569 | } | |
1570 | cm_id_priv->id.state = IB_CM_REP_RCVD; | |
1571 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1572 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1573 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1574 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1575 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1576 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1577 | ||
1578 | /* todo: handle peer_to_peer */ | |
1579 | ||
1580 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1581 | (unsigned long) cm_id_priv->msg); | |
1582 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1583 | if (!ret) | |
1584 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1585 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1586 | ||
1587 | if (ret) | |
1588 | cm_process_work(cm_id_priv, work); | |
1589 | else | |
1590 | cm_deref_id(cm_id_priv); | |
1591 | return 0; | |
1592 | ||
1593 | error: cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1594 | cm_deref_id(cm_id_priv); | |
1595 | return ret; | |
1596 | } | |
1597 | ||
1598 | static int cm_establish_handler(struct cm_work *work) | |
1599 | { | |
1600 | struct cm_id_private *cm_id_priv; | |
1601 | unsigned long flags; | |
1602 | int ret; | |
1603 | ||
1604 | /* See comment in ib_cm_establish about lookup. */ | |
1605 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); | |
1606 | if (!cm_id_priv) | |
1607 | return -EINVAL; | |
1608 | ||
1609 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1610 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { | |
1611 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1612 | goto out; | |
1613 | } | |
1614 | ||
1615 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1616 | (unsigned long) cm_id_priv->msg); | |
1617 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1618 | if (!ret) | |
1619 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1620 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1621 | ||
1622 | if (ret) | |
1623 | cm_process_work(cm_id_priv, work); | |
1624 | else | |
1625 | cm_deref_id(cm_id_priv); | |
1626 | return 0; | |
1627 | out: | |
1628 | cm_deref_id(cm_id_priv); | |
1629 | return -EINVAL; | |
1630 | } | |
1631 | ||
1632 | static int cm_rtu_handler(struct cm_work *work) | |
1633 | { | |
1634 | struct cm_id_private *cm_id_priv; | |
1635 | struct cm_rtu_msg *rtu_msg; | |
1636 | unsigned long flags; | |
1637 | int ret; | |
1638 | ||
1639 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1640 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1641 | rtu_msg->local_comm_id); | |
1642 | if (!cm_id_priv) | |
1643 | return -EINVAL; | |
1644 | ||
1645 | work->cm_event.private_data = &rtu_msg->private_data; | |
1646 | ||
1647 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1648 | if (cm_id_priv->id.state != IB_CM_REP_SENT && | |
1649 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
1650 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1651 | goto out; | |
1652 | } | |
1653 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1654 | ||
1655 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1656 | (unsigned long) cm_id_priv->msg); | |
1657 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1658 | if (!ret) | |
1659 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1660 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1661 | ||
1662 | if (ret) | |
1663 | cm_process_work(cm_id_priv, work); | |
1664 | else | |
1665 | cm_deref_id(cm_id_priv); | |
1666 | return 0; | |
1667 | out: | |
1668 | cm_deref_id(cm_id_priv); | |
1669 | return -EINVAL; | |
1670 | } | |
1671 | ||
1672 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1673 | struct cm_id_private *cm_id_priv, | |
1674 | const void *private_data, | |
1675 | u8 private_data_len) | |
1676 | { | |
1677 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1678 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1679 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1680 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1681 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1682 | ||
1683 | if (private_data && private_data_len) | |
1684 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1685 | } | |
1686 | ||
1687 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1688 | const void *private_data, | |
1689 | u8 private_data_len) | |
1690 | { | |
1691 | struct cm_id_private *cm_id_priv; | |
1692 | struct ib_mad_send_buf *msg; | |
1693 | struct ib_send_wr *bad_send_wr; | |
1694 | unsigned long flags; | |
1695 | int ret; | |
1696 | ||
1697 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1698 | return -EINVAL; | |
1699 | ||
1700 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1701 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1702 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1703 | ret = -EINVAL; | |
1704 | goto out; | |
1705 | } | |
1706 | ||
1707 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1708 | if (ret) { | |
1709 | cm_enter_timewait(cm_id_priv); | |
1710 | goto out; | |
1711 | } | |
1712 | ||
1713 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1714 | private_data, private_data_len); | |
1715 | msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
1716 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; | |
1717 | ||
1718 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1719 | &msg->send_wr, &bad_send_wr); | |
1720 | if (ret) { | |
1721 | cm_enter_timewait(cm_id_priv); | |
1722 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1723 | cm_free_msg(msg); | |
1724 | return ret; | |
1725 | } | |
1726 | ||
1727 | cm_id->state = IB_CM_DREQ_SENT; | |
1728 | cm_id_priv->msg = msg; | |
1729 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1730 | return ret; | |
1731 | } | |
1732 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1733 | ||
1734 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1735 | struct cm_id_private *cm_id_priv, | |
1736 | const void *private_data, | |
1737 | u8 private_data_len) | |
1738 | { | |
1739 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1740 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1741 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1742 | ||
1743 | if (private_data && private_data_len) | |
1744 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
1745 | } | |
1746 | ||
1747 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
1748 | const void *private_data, | |
1749 | u8 private_data_len) | |
1750 | { | |
1751 | struct cm_id_private *cm_id_priv; | |
1752 | struct ib_mad_send_buf *msg; | |
1753 | struct ib_send_wr *bad_send_wr; | |
1754 | unsigned long flags; | |
1755 | void *data; | |
1756 | int ret; | |
1757 | ||
1758 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
1759 | return -EINVAL; | |
1760 | ||
1761 | data = cm_copy_private_data(private_data, private_data_len); | |
1762 | if (IS_ERR(data)) | |
1763 | return PTR_ERR(data); | |
1764 | ||
1765 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1766 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1767 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
1768 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1769 | kfree(data); | |
1770 | return -EINVAL; | |
1771 | } | |
1772 | ||
1773 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1774 | cm_enter_timewait(cm_id_priv); | |
1775 | ||
1776 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1777 | if (ret) | |
1778 | goto out; | |
1779 | ||
1780 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1781 | private_data, private_data_len); | |
1782 | ||
1783 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr, | |
1784 | &bad_send_wr); | |
1785 | if (ret) { | |
1786 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1787 | cm_free_msg(msg); | |
1788 | return ret; | |
1789 | } | |
1790 | ||
1791 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1792 | return ret; | |
1793 | } | |
1794 | EXPORT_SYMBOL(ib_send_cm_drep); | |
1795 | ||
1796 | static int cm_dreq_handler(struct cm_work *work) | |
1797 | { | |
1798 | struct cm_id_private *cm_id_priv; | |
1799 | struct cm_dreq_msg *dreq_msg; | |
1800 | struct ib_mad_send_buf *msg = NULL; | |
1801 | struct ib_send_wr *bad_send_wr; | |
1802 | unsigned long flags; | |
1803 | int ret; | |
1804 | ||
1805 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
1806 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
1807 | dreq_msg->local_comm_id); | |
1808 | if (!cm_id_priv) | |
1809 | return -EINVAL; | |
1810 | ||
1811 | work->cm_event.private_data = &dreq_msg->private_data; | |
1812 | ||
1813 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1814 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) | |
1815 | goto unlock; | |
1816 | ||
1817 | switch (cm_id_priv->id.state) { | |
1818 | case IB_CM_REP_SENT: | |
1819 | case IB_CM_DREQ_SENT: | |
1820 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1821 | (unsigned long) cm_id_priv->msg); | |
1822 | break; | |
1823 | case IB_CM_ESTABLISHED: | |
1824 | case IB_CM_MRA_REP_RCVD: | |
1825 | break; | |
1826 | case IB_CM_TIMEWAIT: | |
1827 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
1828 | goto unlock; | |
1829 | ||
1830 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1831 | cm_id_priv->private_data, | |
1832 | cm_id_priv->private_data_len); | |
1833 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1834 | ||
1835 | if (ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1836 | &msg->send_wr, &bad_send_wr)) | |
1837 | cm_free_msg(msg); | |
1838 | goto deref; | |
1839 | default: | |
1840 | goto unlock; | |
1841 | } | |
1842 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
1843 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
1844 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1845 | if (!ret) | |
1846 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1847 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1848 | ||
1849 | if (ret) | |
1850 | cm_process_work(cm_id_priv, work); | |
1851 | else | |
1852 | cm_deref_id(cm_id_priv); | |
1853 | return 0; | |
1854 | ||
1855 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1856 | deref: cm_deref_id(cm_id_priv); | |
1857 | return -EINVAL; | |
1858 | } | |
1859 | ||
1860 | static int cm_drep_handler(struct cm_work *work) | |
1861 | { | |
1862 | struct cm_id_private *cm_id_priv; | |
1863 | struct cm_drep_msg *drep_msg; | |
1864 | unsigned long flags; | |
1865 | int ret; | |
1866 | ||
1867 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1868 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
1869 | drep_msg->local_comm_id); | |
1870 | if (!cm_id_priv) | |
1871 | return -EINVAL; | |
1872 | ||
1873 | work->cm_event.private_data = &drep_msg->private_data; | |
1874 | ||
1875 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1876 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && | |
1877 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
1878 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1879 | goto out; | |
1880 | } | |
1881 | cm_enter_timewait(cm_id_priv); | |
1882 | ||
1883 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1884 | (unsigned long) cm_id_priv->msg); | |
1885 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1886 | if (!ret) | |
1887 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1888 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1889 | ||
1890 | if (ret) | |
1891 | cm_process_work(cm_id_priv, work); | |
1892 | else | |
1893 | cm_deref_id(cm_id_priv); | |
1894 | return 0; | |
1895 | out: | |
1896 | cm_deref_id(cm_id_priv); | |
1897 | return -EINVAL; | |
1898 | } | |
1899 | ||
1900 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
1901 | enum ib_cm_rej_reason reason, | |
1902 | void *ari, | |
1903 | u8 ari_length, | |
1904 | const void *private_data, | |
1905 | u8 private_data_len) | |
1906 | { | |
1907 | struct cm_id_private *cm_id_priv; | |
1908 | struct ib_mad_send_buf *msg; | |
1909 | struct ib_send_wr *bad_send_wr; | |
1910 | unsigned long flags; | |
1911 | int ret; | |
1912 | ||
1913 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
1914 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
1915 | return -EINVAL; | |
1916 | ||
1917 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1918 | ||
1919 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1920 | switch (cm_id->state) { | |
1921 | case IB_CM_REQ_SENT: | |
1922 | case IB_CM_MRA_REQ_RCVD: | |
1923 | case IB_CM_REQ_RCVD: | |
1924 | case IB_CM_MRA_REQ_SENT: | |
1925 | case IB_CM_REP_RCVD: | |
1926 | case IB_CM_MRA_REP_SENT: | |
1927 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1928 | if (!ret) | |
1929 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
1930 | cm_id_priv, reason, ari, ari_length, | |
1931 | private_data, private_data_len); | |
1932 | ||
1933 | cm_reset_to_idle(cm_id_priv); | |
1934 | break; | |
1935 | case IB_CM_REP_SENT: | |
1936 | case IB_CM_MRA_REP_RCVD: | |
1937 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1938 | if (!ret) | |
1939 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
1940 | cm_id_priv, reason, ari, ari_length, | |
1941 | private_data, private_data_len); | |
1942 | ||
1943 | cm_enter_timewait(cm_id_priv); | |
1944 | break; | |
1945 | default: | |
1946 | ret = -EINVAL; | |
1947 | goto out; | |
1948 | } | |
1949 | ||
1950 | if (ret) | |
1951 | goto out; | |
1952 | ||
1953 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1954 | &msg->send_wr, &bad_send_wr); | |
1955 | if (ret) | |
1956 | cm_free_msg(msg); | |
1957 | ||
1958 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1959 | return ret; | |
1960 | } | |
1961 | EXPORT_SYMBOL(ib_send_cm_rej); | |
1962 | ||
1963 | static void cm_format_rej_event(struct cm_work *work) | |
1964 | { | |
1965 | struct cm_rej_msg *rej_msg; | |
1966 | struct ib_cm_rej_event_param *param; | |
1967 | ||
1968 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
1969 | param = &work->cm_event.param.rej_rcvd; | |
1970 | param->ari = rej_msg->ari; | |
1971 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
1972 | param->reason = rej_msg->reason; | |
1973 | work->cm_event.private_data = &rej_msg->private_data; | |
1974 | } | |
1975 | ||
1976 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
1977 | { | |
1978 | struct cm_timewait_info *timewait_info; | |
1979 | struct cm_id_private *cm_id_priv; | |
1980 | unsigned long flags; | |
1981 | u32 remote_id; | |
1982 | ||
1983 | remote_id = rej_msg->local_comm_id; | |
1984 | ||
1985 | if (rej_msg->reason == IB_CM_REJ_TIMEOUT) { | |
1986 | spin_lock_irqsave(&cm.lock, flags); | |
1987 | timewait_info = cm_find_remote_id( *((u64 *) rej_msg->ari), | |
1988 | remote_id); | |
1989 | if (!timewait_info) { | |
1990 | spin_unlock_irqrestore(&cm.lock, flags); | |
1991 | return NULL; | |
1992 | } | |
1993 | cm_id_priv = idr_find(&cm.local_id_table, | |
1994 | (int) timewait_info->work.local_id); | |
1995 | if (cm_id_priv) { | |
1996 | if (cm_id_priv->id.remote_id == remote_id) | |
1997 | atomic_inc(&cm_id_priv->refcount); | |
1998 | else | |
1999 | cm_id_priv = NULL; | |
2000 | } | |
2001 | spin_unlock_irqrestore(&cm.lock, flags); | |
2002 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) | |
2003 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2004 | else | |
2005 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2006 | ||
2007 | return cm_id_priv; | |
2008 | } | |
2009 | ||
2010 | static int cm_rej_handler(struct cm_work *work) | |
2011 | { | |
2012 | struct cm_id_private *cm_id_priv; | |
2013 | struct cm_rej_msg *rej_msg; | |
2014 | unsigned long flags; | |
2015 | int ret; | |
2016 | ||
2017 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2018 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2019 | if (!cm_id_priv) | |
2020 | return -EINVAL; | |
2021 | ||
2022 | cm_format_rej_event(work); | |
2023 | ||
2024 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2025 | switch (cm_id_priv->id.state) { | |
2026 | case IB_CM_REQ_SENT: | |
2027 | case IB_CM_MRA_REQ_RCVD: | |
2028 | case IB_CM_REP_SENT: | |
2029 | case IB_CM_MRA_REP_RCVD: | |
2030 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2031 | (unsigned long) cm_id_priv->msg); | |
2032 | /* fall through */ | |
2033 | case IB_CM_REQ_RCVD: | |
2034 | case IB_CM_MRA_REQ_SENT: | |
2035 | if (rej_msg->reason == IB_CM_REJ_STALE_CONN) | |
2036 | cm_enter_timewait(cm_id_priv); | |
2037 | else | |
2038 | cm_reset_to_idle(cm_id_priv); | |
2039 | break; | |
2040 | case IB_CM_DREQ_SENT: | |
2041 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2042 | (unsigned long) cm_id_priv->msg); | |
2043 | /* fall through */ | |
2044 | case IB_CM_REP_RCVD: | |
2045 | case IB_CM_MRA_REP_SENT: | |
2046 | case IB_CM_ESTABLISHED: | |
2047 | cm_enter_timewait(cm_id_priv); | |
2048 | break; | |
2049 | default: | |
2050 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2051 | ret = -EINVAL; | |
2052 | goto out; | |
2053 | } | |
2054 | ||
2055 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2056 | if (!ret) | |
2057 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2058 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2059 | ||
2060 | if (ret) | |
2061 | cm_process_work(cm_id_priv, work); | |
2062 | else | |
2063 | cm_deref_id(cm_id_priv); | |
2064 | return 0; | |
2065 | out: | |
2066 | cm_deref_id(cm_id_priv); | |
2067 | return -EINVAL; | |
2068 | } | |
2069 | ||
2070 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2071 | u8 service_timeout, | |
2072 | const void *private_data, | |
2073 | u8 private_data_len) | |
2074 | { | |
2075 | struct cm_id_private *cm_id_priv; | |
2076 | struct ib_mad_send_buf *msg; | |
2077 | struct ib_send_wr *bad_send_wr; | |
2078 | void *data; | |
2079 | unsigned long flags; | |
2080 | int ret; | |
2081 | ||
2082 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2083 | return -EINVAL; | |
2084 | ||
2085 | data = cm_copy_private_data(private_data, private_data_len); | |
2086 | if (IS_ERR(data)) | |
2087 | return PTR_ERR(data); | |
2088 | ||
2089 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2090 | ||
2091 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2092 | switch(cm_id_priv->id.state) { | |
2093 | case IB_CM_REQ_RCVD: | |
2094 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2095 | if (ret) | |
2096 | goto error1; | |
2097 | ||
2098 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2099 | CM_MSG_RESPONSE_REQ, service_timeout, | |
2100 | private_data, private_data_len); | |
2101 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2102 | &msg->send_wr, &bad_send_wr); | |
2103 | if (ret) | |
2104 | goto error2; | |
2105 | cm_id->state = IB_CM_MRA_REQ_SENT; | |
2106 | break; | |
2107 | case IB_CM_REP_RCVD: | |
2108 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2109 | if (ret) | |
2110 | goto error1; | |
2111 | ||
2112 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2113 | CM_MSG_RESPONSE_REP, service_timeout, | |
2114 | private_data, private_data_len); | |
2115 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2116 | &msg->send_wr, &bad_send_wr); | |
2117 | if (ret) | |
2118 | goto error2; | |
2119 | cm_id->state = IB_CM_MRA_REP_SENT; | |
2120 | break; | |
2121 | case IB_CM_ESTABLISHED: | |
2122 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2123 | if (ret) | |
2124 | goto error1; | |
2125 | ||
2126 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2127 | CM_MSG_RESPONSE_OTHER, service_timeout, | |
2128 | private_data, private_data_len); | |
2129 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2130 | &msg->send_wr, &bad_send_wr); | |
2131 | if (ret) | |
2132 | goto error2; | |
2133 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; | |
2134 | break; | |
2135 | default: | |
2136 | ret = -EINVAL; | |
2137 | goto error1; | |
2138 | } | |
2139 | cm_id_priv->service_timeout = service_timeout; | |
2140 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2141 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2142 | return 0; | |
2143 | ||
2144 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2145 | kfree(data); | |
2146 | return ret; | |
2147 | ||
2148 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2149 | kfree(data); | |
2150 | cm_free_msg(msg); | |
2151 | return ret; | |
2152 | } | |
2153 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2154 | ||
2155 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2156 | { | |
2157 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2158 | case CM_MSG_RESPONSE_REQ: | |
2159 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2160 | case CM_MSG_RESPONSE_REP: | |
2161 | case CM_MSG_RESPONSE_OTHER: | |
2162 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2163 | mra_msg->local_comm_id); | |
2164 | default: | |
2165 | return NULL; | |
2166 | } | |
2167 | } | |
2168 | ||
2169 | static int cm_mra_handler(struct cm_work *work) | |
2170 | { | |
2171 | struct cm_id_private *cm_id_priv; | |
2172 | struct cm_mra_msg *mra_msg; | |
2173 | unsigned long flags; | |
2174 | int timeout, ret; | |
2175 | ||
2176 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2177 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2178 | if (!cm_id_priv) | |
2179 | return -EINVAL; | |
2180 | ||
2181 | work->cm_event.private_data = &mra_msg->private_data; | |
2182 | work->cm_event.param.mra_rcvd.service_timeout = | |
2183 | cm_mra_get_service_timeout(mra_msg); | |
2184 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
2185 | cm_convert_to_ms(cm_id_priv->av.packet_life_time); | |
2186 | ||
2187 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2188 | switch (cm_id_priv->id.state) { | |
2189 | case IB_CM_REQ_SENT: | |
2190 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2191 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
2192 | (unsigned long) cm_id_priv->msg, timeout)) | |
2193 | goto out; | |
2194 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2195 | break; | |
2196 | case IB_CM_REP_SENT: | |
2197 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2198 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
2199 | (unsigned long) cm_id_priv->msg, timeout)) | |
2200 | goto out; | |
2201 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2202 | break; | |
2203 | case IB_CM_ESTABLISHED: | |
2204 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2205 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2206 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
2207 | (unsigned long) cm_id_priv->msg, timeout)) | |
2208 | goto out; | |
2209 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; | |
2210 | break; | |
2211 | default: | |
2212 | goto out; | |
2213 | } | |
2214 | ||
2215 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2216 | cm_id_priv->id.state; | |
2217 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2218 | if (!ret) | |
2219 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2220 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2221 | ||
2222 | if (ret) | |
2223 | cm_process_work(cm_id_priv, work); | |
2224 | else | |
2225 | cm_deref_id(cm_id_priv); | |
2226 | return 0; | |
2227 | out: | |
2228 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2229 | cm_deref_id(cm_id_priv); | |
2230 | return -EINVAL; | |
2231 | } | |
2232 | ||
2233 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2234 | struct cm_id_private *cm_id_priv, | |
2235 | struct ib_sa_path_rec *alternate_path, | |
2236 | const void *private_data, | |
2237 | u8 private_data_len) | |
2238 | { | |
2239 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2240 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2241 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2242 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2243 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2244 | /* todo: need remote CM response timeout */ | |
2245 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2246 | lap_msg->alt_local_lid = alternate_path->slid; | |
2247 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2248 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2249 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2250 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2251 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2252 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2253 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2254 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2255 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2256 | cm_lap_set_local_ack_timeout(lap_msg, | |
2257 | min(31, alternate_path->packet_life_time + 1)); | |
2258 | ||
2259 | if (private_data && private_data_len) | |
2260 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2261 | } | |
2262 | ||
2263 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2264 | struct ib_sa_path_rec *alternate_path, | |
2265 | const void *private_data, | |
2266 | u8 private_data_len) | |
2267 | { | |
2268 | struct cm_id_private *cm_id_priv; | |
2269 | struct ib_mad_send_buf *msg; | |
2270 | struct ib_send_wr *bad_send_wr; | |
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); | |
2291 | msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
2292 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; | |
2293 | ||
2294 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2295 | &msg->send_wr, &bad_send_wr); | |
2296 | if (ret) { | |
2297 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2298 | cm_free_msg(msg); | |
2299 | return ret; | |
2300 | } | |
2301 | ||
2302 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2303 | cm_id_priv->msg = msg; | |
2304 | ||
2305 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2306 | return ret; | |
2307 | } | |
2308 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2309 | ||
2310 | static void cm_format_path_from_lap(struct ib_sa_path_rec *path, | |
2311 | struct cm_lap_msg *lap_msg) | |
2312 | { | |
2313 | memset(path, 0, sizeof *path); | |
2314 | path->dgid = lap_msg->alt_local_gid; | |
2315 | path->sgid = lap_msg->alt_remote_gid; | |
2316 | path->dlid = lap_msg->alt_local_lid; | |
2317 | path->slid = lap_msg->alt_remote_lid; | |
2318 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2319 | path->hop_limit = lap_msg->alt_hop_limit; | |
2320 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2321 | path->reversible = 1; | |
2322 | /* pkey is same as in REQ */ | |
2323 | path->sl = cm_lap_get_sl(lap_msg); | |
2324 | path->mtu_selector = IB_SA_EQ; | |
2325 | /* mtu is same as in REQ */ | |
2326 | path->rate_selector = IB_SA_EQ; | |
2327 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2328 | path->packet_life_time_selector = IB_SA_EQ; | |
2329 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2330 | path->packet_life_time -= (path->packet_life_time > 0); | |
2331 | } | |
2332 | ||
2333 | static int cm_lap_handler(struct cm_work *work) | |
2334 | { | |
2335 | struct cm_id_private *cm_id_priv; | |
2336 | struct cm_lap_msg *lap_msg; | |
2337 | struct ib_cm_lap_event_param *param; | |
2338 | struct ib_mad_send_buf *msg = NULL; | |
2339 | struct ib_send_wr *bad_send_wr; | |
2340 | unsigned long flags; | |
2341 | int ret; | |
2342 | ||
2343 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2344 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2345 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2346 | lap_msg->local_comm_id); | |
2347 | if (!cm_id_priv) | |
2348 | return -EINVAL; | |
2349 | ||
2350 | param = &work->cm_event.param.lap_rcvd; | |
2351 | param->alternate_path = &work->path[0]; | |
2352 | cm_format_path_from_lap(param->alternate_path, lap_msg); | |
2353 | work->cm_event.private_data = &lap_msg->private_data; | |
2354 | ||
2355 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2356 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) | |
2357 | goto unlock; | |
2358 | ||
2359 | switch (cm_id_priv->id.lap_state) { | |
2360 | case IB_CM_LAP_IDLE: | |
2361 | break; | |
2362 | case IB_CM_MRA_LAP_SENT: | |
2363 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
2364 | goto unlock; | |
2365 | ||
2366 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2367 | CM_MSG_RESPONSE_OTHER, | |
2368 | cm_id_priv->service_timeout, | |
2369 | cm_id_priv->private_data, | |
2370 | cm_id_priv->private_data_len); | |
2371 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2372 | ||
2373 | if (ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2374 | &msg->send_wr, &bad_send_wr)) | |
2375 | cm_free_msg(msg); | |
2376 | goto deref; | |
2377 | default: | |
2378 | goto unlock; | |
2379 | } | |
2380 | ||
2381 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2382 | cm_id_priv->tid = lap_msg->hdr.tid; | |
2383 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2384 | if (!ret) | |
2385 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2386 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2387 | ||
2388 | if (ret) | |
2389 | cm_process_work(cm_id_priv, work); | |
2390 | else | |
2391 | cm_deref_id(cm_id_priv); | |
2392 | return 0; | |
2393 | ||
2394 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2395 | deref: cm_deref_id(cm_id_priv); | |
2396 | return -EINVAL; | |
2397 | } | |
2398 | ||
2399 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2400 | struct cm_id_private *cm_id_priv, | |
2401 | enum ib_cm_apr_status status, | |
2402 | void *info, | |
2403 | u8 info_length, | |
2404 | const void *private_data, | |
2405 | u8 private_data_len) | |
2406 | { | |
2407 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2408 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2409 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2410 | apr_msg->ap_status = (u8) status; | |
2411 | ||
2412 | if (info && info_length) { | |
2413 | apr_msg->info_length = info_length; | |
2414 | memcpy(apr_msg->info, info, info_length); | |
2415 | } | |
2416 | ||
2417 | if (private_data && private_data_len) | |
2418 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2419 | } | |
2420 | ||
2421 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2422 | enum ib_cm_apr_status status, | |
2423 | void *info, | |
2424 | u8 info_length, | |
2425 | const void *private_data, | |
2426 | u8 private_data_len) | |
2427 | { | |
2428 | struct cm_id_private *cm_id_priv; | |
2429 | struct ib_mad_send_buf *msg; | |
2430 | struct ib_send_wr *bad_send_wr; | |
2431 | unsigned long flags; | |
2432 | int ret; | |
2433 | ||
2434 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2435 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2436 | return -EINVAL; | |
2437 | ||
2438 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2439 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2440 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2441 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2442 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2443 | ret = -EINVAL; | |
2444 | goto out; | |
2445 | } | |
2446 | ||
2447 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2448 | if (ret) | |
2449 | goto out; | |
2450 | ||
2451 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2452 | info, info_length, private_data, private_data_len); | |
2453 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2454 | &msg->send_wr, &bad_send_wr); | |
2455 | if (ret) { | |
2456 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2457 | cm_free_msg(msg); | |
2458 | return ret; | |
2459 | } | |
2460 | ||
2461 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2462 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2463 | return ret; | |
2464 | } | |
2465 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2466 | ||
2467 | static int cm_apr_handler(struct cm_work *work) | |
2468 | { | |
2469 | struct cm_id_private *cm_id_priv; | |
2470 | struct cm_apr_msg *apr_msg; | |
2471 | unsigned long flags; | |
2472 | int ret; | |
2473 | ||
2474 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2475 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2476 | apr_msg->local_comm_id); | |
2477 | if (!cm_id_priv) | |
2478 | return -EINVAL; /* Unmatched reply. */ | |
2479 | ||
2480 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2481 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2482 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2483 | work->cm_event.private_data = &apr_msg->private_data; | |
2484 | ||
2485 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2486 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || | |
2487 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2488 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
2489 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2490 | goto out; | |
2491 | } | |
2492 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
2493 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2494 | (unsigned long) cm_id_priv->msg); | |
2495 | cm_id_priv->msg = NULL; | |
2496 | ||
2497 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2498 | if (!ret) | |
2499 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2500 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2501 | ||
2502 | if (ret) | |
2503 | cm_process_work(cm_id_priv, work); | |
2504 | else | |
2505 | cm_deref_id(cm_id_priv); | |
2506 | return 0; | |
2507 | out: | |
2508 | cm_deref_id(cm_id_priv); | |
2509 | return -EINVAL; | |
2510 | } | |
2511 | ||
2512 | static int cm_timewait_handler(struct cm_work *work) | |
2513 | { | |
2514 | struct cm_timewait_info *timewait_info; | |
2515 | struct cm_id_private *cm_id_priv; | |
2516 | unsigned long flags; | |
2517 | int ret; | |
2518 | ||
2519 | timewait_info = (struct cm_timewait_info *)work; | |
2520 | cm_cleanup_timewait(timewait_info); | |
2521 | ||
2522 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2523 | timewait_info->work.remote_id); | |
2524 | if (!cm_id_priv) | |
2525 | return -EINVAL; | |
2526 | ||
2527 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2528 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || | |
2529 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
2530 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2531 | goto out; | |
2532 | } | |
2533 | cm_id_priv->id.state = IB_CM_IDLE; | |
2534 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2535 | if (!ret) | |
2536 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2537 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2538 | ||
2539 | if (ret) | |
2540 | cm_process_work(cm_id_priv, work); | |
2541 | else | |
2542 | cm_deref_id(cm_id_priv); | |
2543 | return 0; | |
2544 | out: | |
2545 | cm_deref_id(cm_id_priv); | |
2546 | return -EINVAL; | |
2547 | } | |
2548 | ||
2549 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2550 | struct cm_id_private *cm_id_priv, | |
2551 | struct ib_cm_sidr_req_param *param) | |
2552 | { | |
2553 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2554 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2555 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
2556 | sidr_req_msg->pkey = param->pkey; | |
2557 | sidr_req_msg->service_id = param->service_id; | |
2558 | ||
2559 | if (param->private_data && param->private_data_len) | |
2560 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2561 | param->private_data_len); | |
2562 | } | |
2563 | ||
2564 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2565 | struct ib_cm_sidr_req_param *param) | |
2566 | { | |
2567 | struct cm_id_private *cm_id_priv; | |
2568 | struct ib_mad_send_buf *msg; | |
2569 | struct ib_send_wr *bad_send_wr; | |
2570 | unsigned long flags; | |
2571 | int ret; | |
2572 | ||
2573 | if (!param->path || (param->private_data && | |
2574 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2575 | return -EINVAL; | |
2576 | ||
2577 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2578 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2579 | if (ret) | |
2580 | goto out; | |
2581 | ||
2582 | cm_id->service_id = param->service_id; | |
2583 | cm_id->service_mask = ~0ULL; | |
2584 | cm_id_priv->timeout_ms = param->timeout_ms; | |
2585 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2586 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2587 | if (ret) | |
2588 | goto out; | |
2589 | ||
2590 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2591 | param); | |
2592 | msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
2593 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; | |
2594 | ||
2595 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2596 | if (cm_id->state == IB_CM_IDLE) | |
2597 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2598 | &msg->send_wr, &bad_send_wr); | |
2599 | else | |
2600 | ret = -EINVAL; | |
2601 | ||
2602 | if (ret) { | |
2603 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2604 | cm_free_msg(msg); | |
2605 | goto out; | |
2606 | } | |
2607 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2608 | cm_id_priv->msg = msg; | |
2609 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2610 | out: | |
2611 | return ret; | |
2612 | } | |
2613 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2614 | ||
2615 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2616 | struct ib_cm_id *listen_id) | |
2617 | { | |
2618 | struct cm_sidr_req_msg *sidr_req_msg; | |
2619 | struct ib_cm_sidr_req_event_param *param; | |
2620 | ||
2621 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2622 | work->mad_recv_wc->recv_buf.mad; | |
2623 | param = &work->cm_event.param.sidr_req_rcvd; | |
2624 | param->pkey = sidr_req_msg->pkey; | |
2625 | param->listen_id = listen_id; | |
2626 | param->device = work->port->mad_agent->device; | |
2627 | param->port = work->port->port_num; | |
2628 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2629 | } | |
2630 | ||
2631 | static int cm_sidr_req_handler(struct cm_work *work) | |
2632 | { | |
2633 | struct ib_cm_id *cm_id; | |
2634 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2635 | struct cm_sidr_req_msg *sidr_req_msg; | |
2636 | struct ib_wc *wc; | |
2637 | unsigned long flags; | |
2638 | ||
2639 | cm_id = ib_create_cm_id(NULL, NULL); | |
2640 | if (IS_ERR(cm_id)) | |
2641 | return PTR_ERR(cm_id); | |
2642 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2643 | ||
2644 | /* Record SGID/SLID and request ID for lookup. */ | |
2645 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2646 | work->mad_recv_wc->recv_buf.mad; | |
2647 | wc = work->mad_recv_wc->wc; | |
2648 | cm_id_priv->av.dgid.global.subnet_prefix = wc->slid; | |
2649 | cm_id_priv->av.dgid.global.interface_id = 0; | |
2650 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
2651 | &cm_id_priv->av); | |
2652 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
2653 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; | |
2654 | cm_id_priv->tid = sidr_req_msg->hdr.tid; | |
2655 | atomic_inc(&cm_id_priv->work_count); | |
2656 | ||
2657 | spin_lock_irqsave(&cm.lock, flags); | |
2658 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); | |
2659 | if (cur_cm_id_priv) { | |
2660 | spin_unlock_irqrestore(&cm.lock, flags); | |
2661 | goto out; /* Duplicate message. */ | |
2662 | } | |
2663 | cur_cm_id_priv = cm_find_listen(sidr_req_msg->service_id); | |
2664 | if (!cur_cm_id_priv) { | |
2665 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2666 | spin_unlock_irqrestore(&cm.lock, flags); | |
2667 | /* todo: reply with no match */ | |
2668 | goto out; /* No match. */ | |
2669 | } | |
2670 | atomic_inc(&cur_cm_id_priv->refcount); | |
2671 | spin_unlock_irqrestore(&cm.lock, flags); | |
2672 | ||
2673 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2674 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2675 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
2676 | cm_id_priv->id.service_mask = ~0ULL; | |
2677 | ||
2678 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2679 | cm_process_work(cm_id_priv, work); | |
2680 | cm_deref_id(cur_cm_id_priv); | |
2681 | return 0; | |
2682 | out: | |
2683 | ib_destroy_cm_id(&cm_id_priv->id); | |
2684 | return -EINVAL; | |
2685 | } | |
2686 | ||
2687 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2688 | struct cm_id_private *cm_id_priv, | |
2689 | struct ib_cm_sidr_rep_param *param) | |
2690 | { | |
2691 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2692 | cm_id_priv->tid); | |
2693 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2694 | sidr_rep_msg->status = param->status; | |
2695 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2696 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2697 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2698 | ||
2699 | if (param->info && param->info_length) | |
2700 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2701 | ||
2702 | if (param->private_data && param->private_data_len) | |
2703 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2704 | param->private_data_len); | |
2705 | } | |
2706 | ||
2707 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
2708 | struct ib_cm_sidr_rep_param *param) | |
2709 | { | |
2710 | struct cm_id_private *cm_id_priv; | |
2711 | struct ib_mad_send_buf *msg; | |
2712 | struct ib_send_wr *bad_send_wr; | |
2713 | unsigned long flags; | |
2714 | int ret; | |
2715 | ||
2716 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
2717 | (param->private_data && | |
2718 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
2719 | return -EINVAL; | |
2720 | ||
2721 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2722 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2723 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
2724 | ret = -EINVAL; | |
2725 | goto error; | |
2726 | } | |
2727 | ||
2728 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2729 | if (ret) | |
2730 | goto error; | |
2731 | ||
2732 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
2733 | param); | |
2734 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2735 | &msg->send_wr, &bad_send_wr); | |
2736 | if (ret) { | |
2737 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2738 | cm_free_msg(msg); | |
2739 | return ret; | |
2740 | } | |
2741 | cm_id->state = IB_CM_IDLE; | |
2742 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2743 | ||
2744 | spin_lock_irqsave(&cm.lock, flags); | |
2745 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2746 | spin_unlock_irqrestore(&cm.lock, flags); | |
2747 | return 0; | |
2748 | ||
2749 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2750 | return ret; | |
2751 | } | |
2752 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
2753 | ||
2754 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
2755 | { | |
2756 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2757 | struct ib_cm_sidr_rep_event_param *param; | |
2758 | ||
2759 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2760 | work->mad_recv_wc->recv_buf.mad; | |
2761 | param = &work->cm_event.param.sidr_rep_rcvd; | |
2762 | param->status = sidr_rep_msg->status; | |
2763 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
2764 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
2765 | param->info = &sidr_rep_msg->info; | |
2766 | param->info_len = sidr_rep_msg->info_length; | |
2767 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
2768 | } | |
2769 | ||
2770 | static int cm_sidr_rep_handler(struct cm_work *work) | |
2771 | { | |
2772 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2773 | struct cm_id_private *cm_id_priv; | |
2774 | unsigned long flags; | |
2775 | ||
2776 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2777 | work->mad_recv_wc->recv_buf.mad; | |
2778 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
2779 | if (!cm_id_priv) | |
2780 | return -EINVAL; /* Unmatched reply. */ | |
2781 | ||
2782 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2783 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { | |
2784 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2785 | goto out; | |
2786 | } | |
2787 | cm_id_priv->id.state = IB_CM_IDLE; | |
2788 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2789 | (unsigned long) cm_id_priv->msg); | |
2790 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2791 | ||
2792 | cm_format_sidr_rep_event(work); | |
2793 | cm_process_work(cm_id_priv, work); | |
2794 | return 0; | |
2795 | out: | |
2796 | cm_deref_id(cm_id_priv); | |
2797 | return -EINVAL; | |
2798 | } | |
2799 | ||
2800 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
2801 | enum ib_wc_status wc_status) | |
2802 | { | |
2803 | struct cm_id_private *cm_id_priv; | |
2804 | struct ib_cm_event cm_event; | |
2805 | enum ib_cm_state state; | |
2806 | unsigned long flags; | |
2807 | int ret; | |
2808 | ||
2809 | memset(&cm_event, 0, sizeof cm_event); | |
2810 | cm_id_priv = msg->context[0]; | |
2811 | ||
2812 | /* Discard old sends or ones without a response. */ | |
2813 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2814 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; | |
2815 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
2816 | goto discard; | |
2817 | ||
2818 | switch (state) { | |
2819 | case IB_CM_REQ_SENT: | |
2820 | case IB_CM_MRA_REQ_RCVD: | |
2821 | cm_reset_to_idle(cm_id_priv); | |
2822 | cm_event.event = IB_CM_REQ_ERROR; | |
2823 | break; | |
2824 | case IB_CM_REP_SENT: | |
2825 | case IB_CM_MRA_REP_RCVD: | |
2826 | cm_reset_to_idle(cm_id_priv); | |
2827 | cm_event.event = IB_CM_REP_ERROR; | |
2828 | break; | |
2829 | case IB_CM_DREQ_SENT: | |
2830 | cm_enter_timewait(cm_id_priv); | |
2831 | cm_event.event = IB_CM_DREQ_ERROR; | |
2832 | break; | |
2833 | case IB_CM_SIDR_REQ_SENT: | |
2834 | cm_id_priv->id.state = IB_CM_IDLE; | |
2835 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
2836 | break; | |
2837 | default: | |
2838 | goto discard; | |
2839 | } | |
2840 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2841 | cm_event.param.send_status = wc_status; | |
2842 | ||
2843 | /* No other events can occur on the cm_id at this point. */ | |
2844 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
2845 | cm_free_msg(msg); | |
2846 | if (ret) | |
2847 | ib_destroy_cm_id(&cm_id_priv->id); | |
2848 | return; | |
2849 | discard: | |
2850 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2851 | cm_free_msg(msg); | |
2852 | } | |
2853 | ||
2854 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
2855 | struct ib_mad_send_wc *mad_send_wc) | |
2856 | { | |
2857 | struct ib_mad_send_buf *msg; | |
2858 | ||
2859 | msg = (struct ib_mad_send_buf *)(unsigned long)mad_send_wc->wr_id; | |
2860 | ||
2861 | switch (mad_send_wc->status) { | |
2862 | case IB_WC_SUCCESS: | |
2863 | case IB_WC_WR_FLUSH_ERR: | |
2864 | cm_free_msg(msg); | |
2865 | break; | |
2866 | default: | |
2867 | if (msg->context[0] && msg->context[1]) | |
2868 | cm_process_send_error(msg, mad_send_wc->status); | |
2869 | else | |
2870 | cm_free_msg(msg); | |
2871 | break; | |
2872 | } | |
2873 | } | |
2874 | ||
2875 | static void cm_work_handler(void *data) | |
2876 | { | |
2877 | struct cm_work *work = data; | |
2878 | int ret; | |
2879 | ||
2880 | switch (work->cm_event.event) { | |
2881 | case IB_CM_REQ_RECEIVED: | |
2882 | ret = cm_req_handler(work); | |
2883 | break; | |
2884 | case IB_CM_MRA_RECEIVED: | |
2885 | ret = cm_mra_handler(work); | |
2886 | break; | |
2887 | case IB_CM_REJ_RECEIVED: | |
2888 | ret = cm_rej_handler(work); | |
2889 | break; | |
2890 | case IB_CM_REP_RECEIVED: | |
2891 | ret = cm_rep_handler(work); | |
2892 | break; | |
2893 | case IB_CM_RTU_RECEIVED: | |
2894 | ret = cm_rtu_handler(work); | |
2895 | break; | |
2896 | case IB_CM_USER_ESTABLISHED: | |
2897 | ret = cm_establish_handler(work); | |
2898 | break; | |
2899 | case IB_CM_DREQ_RECEIVED: | |
2900 | ret = cm_dreq_handler(work); | |
2901 | break; | |
2902 | case IB_CM_DREP_RECEIVED: | |
2903 | ret = cm_drep_handler(work); | |
2904 | break; | |
2905 | case IB_CM_SIDR_REQ_RECEIVED: | |
2906 | ret = cm_sidr_req_handler(work); | |
2907 | break; | |
2908 | case IB_CM_SIDR_REP_RECEIVED: | |
2909 | ret = cm_sidr_rep_handler(work); | |
2910 | break; | |
2911 | case IB_CM_LAP_RECEIVED: | |
2912 | ret = cm_lap_handler(work); | |
2913 | break; | |
2914 | case IB_CM_APR_RECEIVED: | |
2915 | ret = cm_apr_handler(work); | |
2916 | break; | |
2917 | case IB_CM_TIMEWAIT_EXIT: | |
2918 | ret = cm_timewait_handler(work); | |
2919 | break; | |
2920 | default: | |
2921 | ret = -EINVAL; | |
2922 | break; | |
2923 | } | |
2924 | if (ret) | |
2925 | cm_free_work(work); | |
2926 | } | |
2927 | ||
2928 | int ib_cm_establish(struct ib_cm_id *cm_id) | |
2929 | { | |
2930 | struct cm_id_private *cm_id_priv; | |
2931 | struct cm_work *work; | |
2932 | unsigned long flags; | |
2933 | int ret = 0; | |
2934 | ||
2935 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
2936 | if (!work) | |
2937 | return -ENOMEM; | |
2938 | ||
2939 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2940 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2941 | switch (cm_id->state) | |
2942 | { | |
2943 | case IB_CM_REP_SENT: | |
2944 | case IB_CM_MRA_REP_RCVD: | |
2945 | cm_id->state = IB_CM_ESTABLISHED; | |
2946 | break; | |
2947 | case IB_CM_ESTABLISHED: | |
2948 | ret = -EISCONN; | |
2949 | break; | |
2950 | default: | |
2951 | ret = -EINVAL; | |
2952 | break; | |
2953 | } | |
2954 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2955 | ||
2956 | if (ret) { | |
2957 | kfree(work); | |
2958 | goto out; | |
2959 | } | |
2960 | ||
2961 | /* | |
2962 | * The CM worker thread may try to destroy the cm_id before it | |
2963 | * can execute this work item. To prevent potential deadlock, | |
2964 | * we need to find the cm_id once we're in the context of the | |
2965 | * worker thread, rather than holding a reference on it. | |
2966 | */ | |
2967 | INIT_WORK(&work->work, cm_work_handler, work); | |
2968 | work->local_id = cm_id->local_id; | |
2969 | work->remote_id = cm_id->remote_id; | |
2970 | work->mad_recv_wc = NULL; | |
2971 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
2972 | queue_work(cm.wq, &work->work); | |
2973 | out: | |
2974 | return ret; | |
2975 | } | |
2976 | EXPORT_SYMBOL(ib_cm_establish); | |
2977 | ||
2978 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
2979 | struct ib_mad_recv_wc *mad_recv_wc) | |
2980 | { | |
2981 | struct cm_work *work; | |
2982 | enum ib_cm_event_type event; | |
2983 | int paths = 0; | |
2984 | ||
2985 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
2986 | case CM_REQ_ATTR_ID: | |
2987 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
2988 | alt_local_lid != 0); | |
2989 | event = IB_CM_REQ_RECEIVED; | |
2990 | break; | |
2991 | case CM_MRA_ATTR_ID: | |
2992 | event = IB_CM_MRA_RECEIVED; | |
2993 | break; | |
2994 | case CM_REJ_ATTR_ID: | |
2995 | event = IB_CM_REJ_RECEIVED; | |
2996 | break; | |
2997 | case CM_REP_ATTR_ID: | |
2998 | event = IB_CM_REP_RECEIVED; | |
2999 | break; | |
3000 | case CM_RTU_ATTR_ID: | |
3001 | event = IB_CM_RTU_RECEIVED; | |
3002 | break; | |
3003 | case CM_DREQ_ATTR_ID: | |
3004 | event = IB_CM_DREQ_RECEIVED; | |
3005 | break; | |
3006 | case CM_DREP_ATTR_ID: | |
3007 | event = IB_CM_DREP_RECEIVED; | |
3008 | break; | |
3009 | case CM_SIDR_REQ_ATTR_ID: | |
3010 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3011 | break; | |
3012 | case CM_SIDR_REP_ATTR_ID: | |
3013 | event = IB_CM_SIDR_REP_RECEIVED; | |
3014 | break; | |
3015 | case CM_LAP_ATTR_ID: | |
3016 | paths = 1; | |
3017 | event = IB_CM_LAP_RECEIVED; | |
3018 | break; | |
3019 | case CM_APR_ATTR_ID: | |
3020 | event = IB_CM_APR_RECEIVED; | |
3021 | break; | |
3022 | default: | |
3023 | ib_free_recv_mad(mad_recv_wc); | |
3024 | return; | |
3025 | } | |
3026 | ||
3027 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, | |
3028 | GFP_KERNEL); | |
3029 | if (!work) { | |
3030 | ib_free_recv_mad(mad_recv_wc); | |
3031 | return; | |
3032 | } | |
3033 | ||
3034 | INIT_WORK(&work->work, cm_work_handler, work); | |
3035 | work->cm_event.event = event; | |
3036 | work->mad_recv_wc = mad_recv_wc; | |
3037 | work->port = (struct cm_port *)mad_agent->context; | |
3038 | queue_work(cm.wq, &work->work); | |
3039 | } | |
3040 | ||
3041 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3042 | struct ib_qp_attr *qp_attr, | |
3043 | int *qp_attr_mask) | |
3044 | { | |
3045 | unsigned long flags; | |
3046 | int ret; | |
3047 | ||
3048 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3049 | switch (cm_id_priv->id.state) { | |
3050 | case IB_CM_REQ_SENT: | |
3051 | case IB_CM_MRA_REQ_RCVD: | |
3052 | case IB_CM_REQ_RCVD: | |
3053 | case IB_CM_MRA_REQ_SENT: | |
3054 | case IB_CM_REP_RCVD: | |
3055 | case IB_CM_MRA_REP_SENT: | |
3056 | case IB_CM_REP_SENT: | |
3057 | case IB_CM_MRA_REP_RCVD: | |
3058 | case IB_CM_ESTABLISHED: | |
3059 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3060 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
3061 | qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE; | |
3062 | if (cm_id_priv->responder_resources) | |
3063 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_WRITE | | |
3064 | IB_ACCESS_REMOTE_READ; | |
3065 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; | |
3066 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3067 | ret = 0; | |
3068 | break; | |
3069 | default: | |
3070 | ret = -EINVAL; | |
3071 | break; | |
3072 | } | |
3073 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3074 | return ret; | |
3075 | } | |
3076 | ||
3077 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3078 | struct ib_qp_attr *qp_attr, | |
3079 | int *qp_attr_mask) | |
3080 | { | |
3081 | unsigned long flags; | |
3082 | int ret; | |
3083 | ||
3084 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3085 | switch (cm_id_priv->id.state) { | |
3086 | case IB_CM_REQ_RCVD: | |
3087 | case IB_CM_MRA_REQ_SENT: | |
3088 | case IB_CM_REP_RCVD: | |
3089 | case IB_CM_MRA_REP_SENT: | |
3090 | case IB_CM_REP_SENT: | |
3091 | case IB_CM_MRA_REP_RCVD: | |
3092 | case IB_CM_ESTABLISHED: | |
3093 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
3094 | IB_QP_DEST_QPN | IB_QP_RQ_PSN | | |
3095 | IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER; | |
3096 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; | |
3097 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3098 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3099 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
3100 | qp_attr->max_dest_rd_atomic = cm_id_priv->responder_resources; | |
3101 | qp_attr->min_rnr_timer = 0; | |
3102 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3103 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
3104 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; | |
3105 | } | |
3106 | ret = 0; | |
3107 | break; | |
3108 | default: | |
3109 | ret = -EINVAL; | |
3110 | break; | |
3111 | } | |
3112 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3113 | return ret; | |
3114 | } | |
3115 | ||
3116 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3117 | struct ib_qp_attr *qp_attr, | |
3118 | int *qp_attr_mask) | |
3119 | { | |
3120 | unsigned long flags; | |
3121 | int ret; | |
3122 | ||
3123 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3124 | switch (cm_id_priv->id.state) { | |
3125 | case IB_CM_REP_RCVD: | |
3126 | case IB_CM_MRA_REP_SENT: | |
3127 | case IB_CM_REP_SENT: | |
3128 | case IB_CM_MRA_REP_RCVD: | |
3129 | case IB_CM_ESTABLISHED: | |
3130 | *qp_attr_mask = IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3131 | IB_QP_RNR_RETRY | IB_QP_SQ_PSN | | |
3132 | IB_QP_MAX_QP_RD_ATOMIC; | |
3133 | qp_attr->timeout = cm_id_priv->local_ack_timeout; | |
3134 | qp_attr->retry_cnt = cm_id_priv->retry_count; | |
3135 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3136 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
3137 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; | |
3138 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3139 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3140 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3141 | } | |
3142 | ret = 0; | |
3143 | break; | |
3144 | default: | |
3145 | ret = -EINVAL; | |
3146 | break; | |
3147 | } | |
3148 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3149 | return ret; | |
3150 | } | |
3151 | ||
3152 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3153 | struct ib_qp_attr *qp_attr, | |
3154 | int *qp_attr_mask) | |
3155 | { | |
3156 | struct cm_id_private *cm_id_priv; | |
3157 | int ret; | |
3158 | ||
3159 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3160 | switch (qp_attr->qp_state) { | |
3161 | case IB_QPS_INIT: | |
3162 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3163 | break; | |
3164 | case IB_QPS_RTR: | |
3165 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3166 | break; | |
3167 | case IB_QPS_RTS: | |
3168 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3169 | break; | |
3170 | default: | |
3171 | ret = -EINVAL; | |
3172 | break; | |
3173 | } | |
3174 | return ret; | |
3175 | } | |
3176 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3177 | ||
3178 | static u64 cm_get_ca_guid(struct ib_device *device) | |
3179 | { | |
3180 | struct ib_device_attr *device_attr; | |
3181 | u64 guid; | |
3182 | int ret; | |
3183 | ||
3184 | device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); | |
3185 | if (!device_attr) | |
3186 | return 0; | |
3187 | ||
3188 | ret = ib_query_device(device, device_attr); | |
3189 | guid = ret ? 0 : device_attr->node_guid; | |
3190 | kfree(device_attr); | |
3191 | return guid; | |
3192 | } | |
3193 | ||
3194 | static void cm_add_one(struct ib_device *device) | |
3195 | { | |
3196 | struct cm_device *cm_dev; | |
3197 | struct cm_port *port; | |
3198 | struct ib_mad_reg_req reg_req = { | |
3199 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3200 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3201 | }; | |
3202 | struct ib_port_modify port_modify = { | |
3203 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3204 | }; | |
3205 | unsigned long flags; | |
3206 | int ret; | |
3207 | u8 i; | |
3208 | ||
3209 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * | |
3210 | device->phys_port_cnt, GFP_KERNEL); | |
3211 | if (!cm_dev) | |
3212 | return; | |
3213 | ||
3214 | cm_dev->device = device; | |
3215 | cm_dev->ca_guid = cm_get_ca_guid(device); | |
3216 | if (!cm_dev->ca_guid) | |
3217 | goto error1; | |
3218 | ||
3219 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); | |
3220 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3221 | port = &cm_dev->port[i-1]; | |
3222 | port->cm_dev = cm_dev; | |
3223 | port->port_num = i; | |
3224 | port->mad_agent = ib_register_mad_agent(device, i, | |
3225 | IB_QPT_GSI, | |
3226 | ®_req, | |
3227 | 0, | |
3228 | cm_send_handler, | |
3229 | cm_recv_handler, | |
3230 | port); | |
3231 | if (IS_ERR(port->mad_agent)) | |
3232 | goto error2; | |
3233 | ||
3234 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3235 | if (ret) | |
3236 | goto error3; | |
3237 | } | |
3238 | ib_set_client_data(device, &cm_client, cm_dev); | |
3239 | ||
3240 | write_lock_irqsave(&cm.device_lock, flags); | |
3241 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3242 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3243 | return; | |
3244 | ||
3245 | error3: | |
3246 | ib_unregister_mad_agent(port->mad_agent); | |
3247 | error2: | |
3248 | port_modify.set_port_cap_mask = 0; | |
3249 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3250 | while (--i) { | |
3251 | port = &cm_dev->port[i-1]; | |
3252 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3253 | ib_unregister_mad_agent(port->mad_agent); | |
3254 | } | |
3255 | error1: | |
3256 | kfree(cm_dev); | |
3257 | } | |
3258 | ||
3259 | static void cm_remove_one(struct ib_device *device) | |
3260 | { | |
3261 | struct cm_device *cm_dev; | |
3262 | struct cm_port *port; | |
3263 | struct ib_port_modify port_modify = { | |
3264 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3265 | }; | |
3266 | unsigned long flags; | |
3267 | int i; | |
3268 | ||
3269 | cm_dev = ib_get_client_data(device, &cm_client); | |
3270 | if (!cm_dev) | |
3271 | return; | |
3272 | ||
3273 | write_lock_irqsave(&cm.device_lock, flags); | |
3274 | list_del(&cm_dev->list); | |
3275 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3276 | ||
3277 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3278 | port = &cm_dev->port[i-1]; | |
3279 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3280 | ib_unregister_mad_agent(port->mad_agent); | |
3281 | } | |
3282 | kfree(cm_dev); | |
3283 | } | |
3284 | ||
3285 | static int __init ib_cm_init(void) | |
3286 | { | |
3287 | int ret; | |
3288 | ||
3289 | memset(&cm, 0, sizeof cm); | |
3290 | INIT_LIST_HEAD(&cm.device_list); | |
3291 | rwlock_init(&cm.device_lock); | |
3292 | spin_lock_init(&cm.lock); | |
3293 | cm.listen_service_table = RB_ROOT; | |
3294 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3295 | cm.remote_id_table = RB_ROOT; | |
3296 | cm.remote_qp_table = RB_ROOT; | |
3297 | cm.remote_sidr_table = RB_ROOT; | |
3298 | idr_init(&cm.local_id_table); | |
3299 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); | |
3300 | ||
3301 | cm.wq = create_workqueue("ib_cm"); | |
3302 | if (!cm.wq) | |
3303 | return -ENOMEM; | |
3304 | ||
3305 | ret = ib_register_client(&cm_client); | |
3306 | if (ret) | |
3307 | goto error; | |
3308 | ||
3309 | return 0; | |
3310 | error: | |
3311 | destroy_workqueue(cm.wq); | |
3312 | return ret; | |
3313 | } | |
3314 | ||
3315 | static void __exit ib_cm_cleanup(void) | |
3316 | { | |
3317 | flush_workqueue(cm.wq); | |
3318 | destroy_workqueue(cm.wq); | |
3319 | ib_unregister_client(&cm_client); | |
3320 | } | |
3321 | ||
3322 | module_init(ib_cm_init); | |
3323 | module_exit(ib_cm_cleanup); | |
3324 |