Commit | Line | Data |
---|---|---|
a977049d HR |
1 | /* |
2 | * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. | |
3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. | |
4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. | |
5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
6 | * | |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
34 | * | |
35 | * $Id: cm.c 2821 2005-07-08 17:07:28Z sean.hefty $ | |
36 | */ | |
37 | #include <linux/dma-mapping.h> | |
38 | #include <linux/err.h> | |
39 | #include <linux/idr.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/pci.h> | |
42 | #include <linux/rbtree.h> | |
43 | #include <linux/spinlock.h> | |
44 | #include <linux/workqueue.h> | |
45 | ||
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; | |
97f52eb4 | 86 | __be64 ca_guid; |
a977049d HR |
87 | struct cm_port port[0]; |
88 | }; | |
89 | ||
90 | struct cm_av { | |
91 | struct cm_port *port; | |
92 | union ib_gid dgid; | |
93 | struct ib_ah_attr ah_attr; | |
94 | u16 pkey_index; | |
95 | u8 packet_life_time; | |
96 | }; | |
97 | ||
98 | struct cm_work { | |
99 | struct work_struct work; | |
100 | struct list_head list; | |
101 | struct cm_port *port; | |
102 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
103 | __be32 local_id; /* Established / timewait */ |
104 | __be32 remote_id; | |
a977049d HR |
105 | struct ib_cm_event cm_event; |
106 | struct ib_sa_path_rec path[0]; | |
107 | }; | |
108 | ||
109 | struct cm_timewait_info { | |
110 | struct cm_work work; /* Must be first. */ | |
111 | struct rb_node remote_qp_node; | |
112 | struct rb_node remote_id_node; | |
97f52eb4 SH |
113 | __be64 remote_ca_guid; |
114 | __be32 remote_qpn; | |
a977049d HR |
115 | u8 inserted_remote_qp; |
116 | u8 inserted_remote_id; | |
117 | }; | |
118 | ||
119 | struct cm_id_private { | |
120 | struct ib_cm_id id; | |
121 | ||
122 | struct rb_node service_node; | |
123 | struct rb_node sidr_id_node; | |
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; | |
97f52eb4 SH |
135 | __be64 tid; |
136 | __be32 local_qpn; | |
137 | __be32 remote_qpn; | |
138 | __be32 sq_psn; | |
139 | __be32 rq_psn; | |
a977049d HR |
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); | |
97f52eb4 | 256 | ah_attr->dlid = dlid; |
a977049d HR |
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; | |
97f52eb4 | 267 | cm_set_ah_attr(&av->ah_attr, port->port_num, wc->slid, |
a977049d HR |
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; | |
97f52eb4 SH |
298 | cm_set_ah_attr(&av->ah_attr, av->port->port_num, |
299 | be16_to_cpu(path->dlid), path->sl, | |
300 | be16_to_cpu(path->slid) & 0x7F); | |
a977049d HR |
301 | av->packet_life_time = path->packet_life_time; |
302 | return 0; | |
303 | } | |
304 | ||
305 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
306 | { | |
307 | unsigned long flags; | |
308 | int ret; | |
309 | ||
310 | do { | |
311 | spin_lock_irqsave(&cm.lock, flags); | |
312 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 1, | |
97f52eb4 | 313 | (__force int *) &cm_id_priv->id.local_id); |
a977049d HR |
314 | spin_unlock_irqrestore(&cm.lock, flags); |
315 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
316 | return ret; | |
317 | } | |
318 | ||
97f52eb4 | 319 | static void cm_free_id(__be32 local_id) |
a977049d HR |
320 | { |
321 | unsigned long flags; | |
322 | ||
323 | spin_lock_irqsave(&cm.lock, flags); | |
97f52eb4 | 324 | idr_remove(&cm.local_id_table, (__force int) local_id); |
a977049d HR |
325 | spin_unlock_irqrestore(&cm.lock, flags); |
326 | } | |
327 | ||
97f52eb4 | 328 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
329 | { |
330 | struct cm_id_private *cm_id_priv; | |
331 | ||
97f52eb4 | 332 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id); |
a977049d HR |
333 | if (cm_id_priv) { |
334 | if (cm_id_priv->id.remote_id == remote_id) | |
335 | atomic_inc(&cm_id_priv->refcount); | |
336 | else | |
337 | cm_id_priv = NULL; | |
338 | } | |
339 | ||
340 | return cm_id_priv; | |
341 | } | |
342 | ||
97f52eb4 | 343 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
344 | { |
345 | struct cm_id_private *cm_id_priv; | |
346 | unsigned long flags; | |
347 | ||
348 | spin_lock_irqsave(&cm.lock, flags); | |
349 | cm_id_priv = cm_get_id(local_id, remote_id); | |
350 | spin_unlock_irqrestore(&cm.lock, flags); | |
351 | ||
352 | return cm_id_priv; | |
353 | } | |
354 | ||
355 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) | |
356 | { | |
357 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
358 | struct rb_node *parent = NULL; | |
359 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
360 | __be64 service_id = cm_id_priv->id.service_id; |
361 | __be64 service_mask = cm_id_priv->id.service_mask; | |
a977049d HR |
362 | |
363 | while (*link) { | |
364 | parent = *link; | |
365 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
366 | service_node); | |
367 | if ((cur_cm_id_priv->id.service_mask & service_id) == | |
368 | (service_mask & cur_cm_id_priv->id.service_id)) | |
369 | return cm_id_priv; | |
370 | if (service_id < cur_cm_id_priv->id.service_id) | |
371 | link = &(*link)->rb_left; | |
372 | else | |
373 | link = &(*link)->rb_right; | |
374 | } | |
375 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
376 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
377 | return NULL; | |
378 | } | |
379 | ||
97f52eb4 | 380 | static struct cm_id_private * cm_find_listen(__be64 service_id) |
a977049d HR |
381 | { |
382 | struct rb_node *node = cm.listen_service_table.rb_node; | |
383 | struct cm_id_private *cm_id_priv; | |
384 | ||
385 | while (node) { | |
386 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
387 | if ((cm_id_priv->id.service_mask & service_id) == | |
388 | (cm_id_priv->id.service_mask & cm_id_priv->id.service_id)) | |
389 | return cm_id_priv; | |
390 | if (service_id < cm_id_priv->id.service_id) | |
391 | node = node->rb_left; | |
392 | else | |
393 | node = node->rb_right; | |
394 | } | |
395 | return NULL; | |
396 | } | |
397 | ||
398 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
399 | *timewait_info) | |
400 | { | |
401 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
402 | struct rb_node *parent = NULL; | |
403 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
404 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
405 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
406 | |
407 | while (*link) { | |
408 | parent = *link; | |
409 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
410 | remote_id_node); | |
411 | if (remote_id < cur_timewait_info->work.remote_id) | |
412 | link = &(*link)->rb_left; | |
413 | else if (remote_id > cur_timewait_info->work.remote_id) | |
414 | link = &(*link)->rb_right; | |
415 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
416 | link = &(*link)->rb_left; | |
417 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
418 | link = &(*link)->rb_right; | |
419 | else | |
420 | return cur_timewait_info; | |
421 | } | |
422 | timewait_info->inserted_remote_id = 1; | |
423 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
424 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
425 | return NULL; | |
426 | } | |
427 | ||
97f52eb4 SH |
428 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
429 | __be32 remote_id) | |
a977049d HR |
430 | { |
431 | struct rb_node *node = cm.remote_id_table.rb_node; | |
432 | struct cm_timewait_info *timewait_info; | |
433 | ||
434 | while (node) { | |
435 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
436 | remote_id_node); | |
437 | if (remote_id < timewait_info->work.remote_id) | |
438 | node = node->rb_left; | |
439 | else if (remote_id > timewait_info->work.remote_id) | |
440 | node = node->rb_right; | |
441 | else if (remote_ca_guid < timewait_info->remote_ca_guid) | |
442 | node = node->rb_left; | |
443 | else if (remote_ca_guid > timewait_info->remote_ca_guid) | |
444 | node = node->rb_right; | |
445 | else | |
446 | return timewait_info; | |
447 | } | |
448 | return NULL; | |
449 | } | |
450 | ||
451 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
452 | *timewait_info) | |
453 | { | |
454 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
455 | struct rb_node *parent = NULL; | |
456 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
457 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
458 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
459 | |
460 | while (*link) { | |
461 | parent = *link; | |
462 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
463 | remote_qp_node); | |
464 | if (remote_qpn < cur_timewait_info->remote_qpn) | |
465 | link = &(*link)->rb_left; | |
466 | else if (remote_qpn > cur_timewait_info->remote_qpn) | |
467 | link = &(*link)->rb_right; | |
468 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
469 | link = &(*link)->rb_left; | |
470 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
471 | link = &(*link)->rb_right; | |
472 | else | |
473 | return cur_timewait_info; | |
474 | } | |
475 | timewait_info->inserted_remote_qp = 1; | |
476 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
477 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
478 | return NULL; | |
479 | } | |
480 | ||
481 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
482 | *cm_id_priv) | |
483 | { | |
484 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
485 | struct rb_node *parent = NULL; | |
486 | struct cm_id_private *cur_cm_id_priv; | |
487 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 488 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
489 | |
490 | while (*link) { | |
491 | parent = *link; | |
492 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
493 | sidr_id_node); | |
494 | if (remote_id < cur_cm_id_priv->id.remote_id) | |
495 | link = &(*link)->rb_left; | |
496 | else if (remote_id > cur_cm_id_priv->id.remote_id) | |
497 | link = &(*link)->rb_right; | |
498 | else { | |
499 | int cmp; | |
500 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
501 | sizeof *port_gid); | |
502 | if (cmp < 0) | |
503 | link = &(*link)->rb_left; | |
504 | else if (cmp > 0) | |
505 | link = &(*link)->rb_right; | |
506 | else | |
507 | return cur_cm_id_priv; | |
508 | } | |
509 | } | |
510 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
511 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
512 | return NULL; | |
513 | } | |
514 | ||
515 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
516 | enum ib_cm_sidr_status status) | |
517 | { | |
518 | struct ib_cm_sidr_rep_param param; | |
519 | ||
520 | memset(¶m, 0, sizeof param); | |
521 | param.status = status; | |
522 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
523 | } | |
524 | ||
525 | struct ib_cm_id *ib_create_cm_id(ib_cm_handler cm_handler, | |
526 | void *context) | |
527 | { | |
528 | struct cm_id_private *cm_id_priv; | |
529 | int ret; | |
530 | ||
531 | cm_id_priv = kmalloc(sizeof *cm_id_priv, GFP_KERNEL); | |
532 | if (!cm_id_priv) | |
533 | return ERR_PTR(-ENOMEM); | |
534 | ||
535 | memset(cm_id_priv, 0, sizeof *cm_id_priv); | |
536 | cm_id_priv->id.state = IB_CM_IDLE; | |
537 | cm_id_priv->id.cm_handler = cm_handler; | |
538 | cm_id_priv->id.context = context; | |
539 | ret = cm_alloc_id(cm_id_priv); | |
540 | if (ret) | |
541 | goto error; | |
542 | ||
543 | spin_lock_init(&cm_id_priv->lock); | |
544 | init_waitqueue_head(&cm_id_priv->wait); | |
545 | INIT_LIST_HEAD(&cm_id_priv->work_list); | |
546 | atomic_set(&cm_id_priv->work_count, -1); | |
547 | atomic_set(&cm_id_priv->refcount, 1); | |
548 | return &cm_id_priv->id; | |
549 | ||
550 | error: | |
551 | kfree(cm_id_priv); | |
552 | return ERR_PTR(-ENOMEM); | |
553 | } | |
554 | EXPORT_SYMBOL(ib_create_cm_id); | |
555 | ||
556 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
557 | { | |
558 | struct cm_work *work; | |
559 | ||
560 | if (list_empty(&cm_id_priv->work_list)) | |
561 | return NULL; | |
562 | ||
563 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
564 | list_del(&work->list); | |
565 | return work; | |
566 | } | |
567 | ||
568 | static void cm_free_work(struct cm_work *work) | |
569 | { | |
570 | if (work->mad_recv_wc) | |
571 | ib_free_recv_mad(work->mad_recv_wc); | |
572 | kfree(work); | |
573 | } | |
574 | ||
575 | static inline int cm_convert_to_ms(int iba_time) | |
576 | { | |
577 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
578 | return 1 << max(iba_time - 8, 0); | |
579 | } | |
580 | ||
581 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) | |
582 | { | |
583 | unsigned long flags; | |
584 | ||
585 | if (!timewait_info->inserted_remote_id && | |
586 | !timewait_info->inserted_remote_qp) | |
587 | return; | |
588 | ||
589 | spin_lock_irqsave(&cm.lock, flags); | |
590 | if (timewait_info->inserted_remote_id) { | |
591 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
592 | timewait_info->inserted_remote_id = 0; | |
593 | } | |
594 | ||
595 | if (timewait_info->inserted_remote_qp) { | |
596 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
597 | timewait_info->inserted_remote_qp = 0; | |
598 | } | |
599 | spin_unlock_irqrestore(&cm.lock, flags); | |
600 | } | |
601 | ||
97f52eb4 | 602 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
603 | { |
604 | struct cm_timewait_info *timewait_info; | |
605 | ||
606 | timewait_info = kmalloc(sizeof *timewait_info, GFP_KERNEL); | |
607 | if (!timewait_info) | |
608 | return ERR_PTR(-ENOMEM); | |
609 | memset(timewait_info, 0, sizeof *timewait_info); | |
610 | ||
611 | timewait_info->work.local_id = local_id; | |
612 | INIT_WORK(&timewait_info->work.work, cm_work_handler, | |
613 | &timewait_info->work); | |
614 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; | |
615 | return timewait_info; | |
616 | } | |
617 | ||
618 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
619 | { | |
620 | int wait_time; | |
621 | ||
622 | /* | |
623 | * The cm_id could be destroyed by the user before we exit timewait. | |
624 | * To protect against this, we search for the cm_id after exiting | |
625 | * timewait before notifying the user that we've exited timewait. | |
626 | */ | |
627 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
628 | wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout); | |
629 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
630 | msecs_to_jiffies(wait_time)); | |
631 | cm_id_priv->timewait_info = NULL; | |
632 | } | |
633 | ||
634 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
635 | { | |
636 | cm_id_priv->id.state = IB_CM_IDLE; | |
637 | if (cm_id_priv->timewait_info) { | |
638 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
639 | kfree(cm_id_priv->timewait_info); | |
640 | cm_id_priv->timewait_info = NULL; | |
641 | } | |
642 | } | |
643 | ||
644 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
645 | { | |
646 | struct cm_id_private *cm_id_priv; | |
647 | struct cm_work *work; | |
648 | unsigned long flags; | |
649 | ||
650 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
651 | retest: | |
652 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
653 | switch (cm_id->state) { | |
654 | case IB_CM_LISTEN: | |
655 | cm_id->state = IB_CM_IDLE; | |
656 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
657 | spin_lock_irqsave(&cm.lock, flags); | |
658 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); | |
659 | spin_unlock_irqrestore(&cm.lock, flags); | |
660 | break; | |
661 | case IB_CM_SIDR_REQ_SENT: | |
662 | cm_id->state = IB_CM_IDLE; | |
663 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
664 | (unsigned long) cm_id_priv->msg); | |
665 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
666 | break; | |
667 | case IB_CM_SIDR_REQ_RCVD: | |
668 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
669 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); | |
670 | break; | |
671 | case IB_CM_REQ_SENT: | |
672 | case IB_CM_MRA_REQ_RCVD: | |
673 | case IB_CM_REP_SENT: | |
674 | case IB_CM_MRA_REP_RCVD: | |
675 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
676 | (unsigned long) cm_id_priv->msg); | |
677 | /* Fall through */ | |
678 | case IB_CM_REQ_RCVD: | |
679 | case IB_CM_MRA_REQ_SENT: | |
680 | case IB_CM_REP_RCVD: | |
681 | case IB_CM_MRA_REP_SENT: | |
682 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
683 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, | |
684 | &cm_id_priv->av.port->cm_dev->ca_guid, | |
685 | sizeof cm_id_priv->av.port->cm_dev->ca_guid, | |
686 | NULL, 0); | |
687 | break; | |
688 | case IB_CM_ESTABLISHED: | |
689 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
690 | ib_send_cm_dreq(cm_id, NULL, 0); | |
691 | goto retest; | |
692 | case IB_CM_DREQ_SENT: | |
693 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
694 | (unsigned long) cm_id_priv->msg); | |
695 | cm_enter_timewait(cm_id_priv); | |
696 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
697 | break; | |
698 | case IB_CM_DREQ_RCVD: | |
699 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
700 | ib_send_cm_drep(cm_id, NULL, 0); | |
701 | break; | |
702 | default: | |
703 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
704 | break; | |
705 | } | |
706 | ||
707 | cm_free_id(cm_id->local_id); | |
708 | atomic_dec(&cm_id_priv->refcount); | |
709 | wait_event(cm_id_priv->wait, !atomic_read(&cm_id_priv->refcount)); | |
710 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) | |
711 | cm_free_work(work); | |
712 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
713 | kfree(cm_id_priv->private_data); | |
714 | kfree(cm_id_priv); | |
715 | } | |
716 | EXPORT_SYMBOL(ib_destroy_cm_id); | |
717 | ||
718 | int ib_cm_listen(struct ib_cm_id *cm_id, | |
97f52eb4 SH |
719 | __be64 service_id, |
720 | __be64 service_mask) | |
a977049d HR |
721 | { |
722 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
723 | unsigned long flags; | |
724 | int ret = 0; | |
725 | ||
97f52eb4 SH |
726 | service_mask = service_mask ? service_mask : |
727 | __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
728 | service_id &= service_mask; |
729 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
730 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
731 | return -EINVAL; | |
732 | ||
733 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
734 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
735 | ||
736 | cm_id->state = IB_CM_LISTEN; | |
737 | ||
738 | spin_lock_irqsave(&cm.lock, flags); | |
739 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 SH |
740 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
741 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
742 | } else { |
743 | cm_id->service_id = service_id; | |
744 | cm_id->service_mask = service_mask; | |
745 | } | |
746 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
747 | spin_unlock_irqrestore(&cm.lock, flags); | |
748 | ||
749 | if (cur_cm_id_priv) { | |
750 | cm_id->state = IB_CM_IDLE; | |
751 | ret = -EBUSY; | |
752 | } | |
753 | return ret; | |
754 | } | |
755 | EXPORT_SYMBOL(ib_cm_listen); | |
756 | ||
97f52eb4 SH |
757 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
758 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
759 | { |
760 | u64 hi_tid, low_tid; | |
761 | ||
762 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
763 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
764 | (msg_seq << 30)); | |
a977049d HR |
765 | return cpu_to_be64(hi_tid | low_tid); |
766 | } | |
767 | ||
768 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 769 | __be16 attr_id, __be64 tid) |
a977049d HR |
770 | { |
771 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
772 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
773 | hdr->class_version = IB_CM_CLASS_VERSION; | |
774 | hdr->method = IB_MGMT_METHOD_SEND; | |
775 | hdr->attr_id = attr_id; | |
776 | hdr->tid = tid; | |
777 | } | |
778 | ||
779 | static void cm_format_req(struct cm_req_msg *req_msg, | |
780 | struct cm_id_private *cm_id_priv, | |
781 | struct ib_cm_req_param *param) | |
782 | { | |
783 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, | |
784 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
785 | ||
786 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
787 | req_msg->service_id = param->service_id; | |
788 | req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
789 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); | |
790 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
791 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
792 | cm_req_set_remote_resp_timeout(req_msg, | |
793 | param->remote_cm_response_timeout); | |
794 | cm_req_set_qp_type(req_msg, param->qp_type); | |
795 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
796 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
797 | cm_req_set_local_resp_timeout(req_msg, | |
798 | param->local_cm_response_timeout); | |
799 | cm_req_set_retry_count(req_msg, param->retry_count); | |
800 | req_msg->pkey = param->primary_path->pkey; | |
801 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
802 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
803 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
804 | cm_req_set_srq(req_msg, param->srq); | |
805 | ||
806 | req_msg->primary_local_lid = param->primary_path->slid; | |
807 | req_msg->primary_remote_lid = param->primary_path->dlid; | |
808 | req_msg->primary_local_gid = param->primary_path->sgid; | |
809 | req_msg->primary_remote_gid = param->primary_path->dgid; | |
810 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); | |
811 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); | |
812 | req_msg->primary_traffic_class = param->primary_path->traffic_class; | |
813 | req_msg->primary_hop_limit = param->primary_path->hop_limit; | |
814 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); | |
815 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ | |
816 | cm_req_set_primary_local_ack_timeout(req_msg, | |
817 | min(31, param->primary_path->packet_life_time + 1)); | |
818 | ||
819 | if (param->alternate_path) { | |
820 | req_msg->alt_local_lid = param->alternate_path->slid; | |
821 | req_msg->alt_remote_lid = param->alternate_path->dlid; | |
822 | req_msg->alt_local_gid = param->alternate_path->sgid; | |
823 | req_msg->alt_remote_gid = param->alternate_path->dgid; | |
824 | cm_req_set_alt_flow_label(req_msg, | |
825 | param->alternate_path->flow_label); | |
826 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); | |
827 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; | |
828 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; | |
829 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); | |
830 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ | |
831 | cm_req_set_alt_local_ack_timeout(req_msg, | |
832 | min(31, param->alternate_path->packet_life_time + 1)); | |
833 | } | |
834 | ||
835 | if (param->private_data && param->private_data_len) | |
836 | memcpy(req_msg->private_data, param->private_data, | |
837 | param->private_data_len); | |
838 | } | |
839 | ||
840 | static inline int cm_validate_req_param(struct ib_cm_req_param *param) | |
841 | { | |
842 | /* peer-to-peer not supported */ | |
843 | if (param->peer_to_peer) | |
844 | return -EINVAL; | |
845 | ||
846 | if (!param->primary_path) | |
847 | return -EINVAL; | |
848 | ||
849 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
850 | return -EINVAL; | |
851 | ||
852 | if (param->private_data && | |
853 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
854 | return -EINVAL; | |
855 | ||
856 | if (param->alternate_path && | |
857 | (param->alternate_path->pkey != param->primary_path->pkey || | |
858 | param->alternate_path->mtu != param->primary_path->mtu)) | |
859 | return -EINVAL; | |
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
864 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
865 | struct ib_cm_req_param *param) | |
866 | { | |
867 | struct cm_id_private *cm_id_priv; | |
868 | struct ib_send_wr *bad_send_wr; | |
869 | struct cm_req_msg *req_msg; | |
870 | unsigned long flags; | |
871 | int ret; | |
872 | ||
873 | ret = cm_validate_req_param(param); | |
874 | if (ret) | |
875 | return ret; | |
876 | ||
877 | /* Verify that we're not in timewait. */ | |
878 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
879 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
880 | if (cm_id->state != IB_CM_IDLE) { | |
881 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
882 | ret = -EINVAL; | |
883 | goto out; | |
884 | } | |
885 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
886 | ||
887 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
888 | id.local_id); | |
889 | if (IS_ERR(cm_id_priv->timewait_info)) | |
890 | goto out; | |
891 | ||
892 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
893 | if (ret) | |
894 | goto error1; | |
895 | if (param->alternate_path) { | |
896 | ret = cm_init_av_by_path(param->alternate_path, | |
897 | &cm_id_priv->alt_av); | |
898 | if (ret) | |
899 | goto error1; | |
900 | } | |
901 | cm_id->service_id = param->service_id; | |
97f52eb4 | 902 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
903 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
904 | param->primary_path->packet_life_time) * 2 + | |
905 | cm_convert_to_ms( | |
906 | param->remote_cm_response_timeout); | |
907 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
908 | cm_id_priv->initiator_depth = param->initiator_depth; | |
909 | cm_id_priv->responder_resources = param->responder_resources; | |
910 | cm_id_priv->retry_count = param->retry_count; | |
911 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
912 | ||
913 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
914 | if (ret) | |
915 | goto error1; | |
916 | ||
917 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
918 | cm_format_req(req_msg, cm_id_priv, param); | |
919 | cm_id_priv->tid = req_msg->hdr.tid; | |
920 | cm_id_priv->msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
921 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; | |
922 | ||
923 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
924 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
925 | cm_id_priv->local_ack_timeout = | |
926 | cm_req_get_primary_local_ack_timeout(req_msg); | |
927 | ||
928 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
929 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
930 | &cm_id_priv->msg->send_wr, &bad_send_wr); | |
931 | if (ret) { | |
932 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
933 | goto error2; | |
934 | } | |
935 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
936 | cm_id->state = IB_CM_REQ_SENT; | |
937 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
938 | return 0; | |
939 | ||
940 | error2: cm_free_msg(cm_id_priv->msg); | |
941 | error1: kfree(cm_id_priv->timewait_info); | |
942 | out: return ret; | |
943 | } | |
944 | EXPORT_SYMBOL(ib_send_cm_req); | |
945 | ||
946 | static int cm_issue_rej(struct cm_port *port, | |
947 | struct ib_mad_recv_wc *mad_recv_wc, | |
948 | enum ib_cm_rej_reason reason, | |
949 | enum cm_msg_response msg_rejected, | |
950 | void *ari, u8 ari_length) | |
951 | { | |
952 | struct ib_mad_send_buf *msg = NULL; | |
953 | struct ib_send_wr *bad_send_wr; | |
954 | struct cm_rej_msg *rej_msg, *rcv_msg; | |
955 | int ret; | |
956 | ||
957 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
958 | if (ret) | |
959 | return ret; | |
960 | ||
961 | /* We just need common CM header information. Cast to any message. */ | |
962 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
963 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
964 | ||
965 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
966 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
967 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
968 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 969 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
970 | |
971 | if (ari && ari_length) { | |
972 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
973 | memcpy(rej_msg->ari, ari, ari_length); | |
974 | } | |
975 | ||
976 | ret = ib_post_send_mad(port->mad_agent, &msg->send_wr, &bad_send_wr); | |
977 | if (ret) | |
978 | cm_free_msg(msg); | |
979 | ||
980 | return ret; | |
981 | } | |
982 | ||
97f52eb4 SH |
983 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
984 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
985 | { |
986 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
987 | ((local_ca_guid == remote_ca_guid) && | |
988 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
989 | } | |
990 | ||
991 | static inline void cm_format_paths_from_req(struct cm_req_msg *req_msg, | |
992 | struct ib_sa_path_rec *primary_path, | |
993 | struct ib_sa_path_rec *alt_path) | |
994 | { | |
995 | memset(primary_path, 0, sizeof *primary_path); | |
996 | primary_path->dgid = req_msg->primary_local_gid; | |
997 | primary_path->sgid = req_msg->primary_remote_gid; | |
998 | primary_path->dlid = req_msg->primary_local_lid; | |
999 | primary_path->slid = req_msg->primary_remote_lid; | |
1000 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1001 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1002 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1003 | primary_path->reversible = 1; | |
1004 | primary_path->pkey = req_msg->pkey; | |
1005 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1006 | primary_path->mtu_selector = IB_SA_EQ; | |
1007 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1008 | primary_path->rate_selector = IB_SA_EQ; | |
1009 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1010 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1011 | primary_path->packet_life_time = | |
1012 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1013 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1014 | ||
1015 | if (req_msg->alt_local_lid) { | |
1016 | memset(alt_path, 0, sizeof *alt_path); | |
1017 | alt_path->dgid = req_msg->alt_local_gid; | |
1018 | alt_path->sgid = req_msg->alt_remote_gid; | |
1019 | alt_path->dlid = req_msg->alt_local_lid; | |
1020 | alt_path->slid = req_msg->alt_remote_lid; | |
1021 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1022 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1023 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1024 | alt_path->reversible = 1; | |
1025 | alt_path->pkey = req_msg->pkey; | |
1026 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1027 | alt_path->mtu_selector = IB_SA_EQ; | |
1028 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1029 | alt_path->rate_selector = IB_SA_EQ; | |
1030 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1031 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1032 | alt_path->packet_life_time = | |
1033 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1034 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | static void cm_format_req_event(struct cm_work *work, | |
1039 | struct cm_id_private *cm_id_priv, | |
1040 | struct ib_cm_id *listen_id) | |
1041 | { | |
1042 | struct cm_req_msg *req_msg; | |
1043 | struct ib_cm_req_event_param *param; | |
1044 | ||
1045 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1046 | param = &work->cm_event.param.req_rcvd; | |
1047 | param->listen_id = listen_id; | |
1048 | param->device = cm_id_priv->av.port->mad_agent->device; | |
1049 | param->port = cm_id_priv->av.port->port_num; | |
1050 | param->primary_path = &work->path[0]; | |
1051 | if (req_msg->alt_local_lid) | |
1052 | param->alternate_path = &work->path[1]; | |
1053 | else | |
1054 | param->alternate_path = NULL; | |
1055 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1056 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1057 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1058 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1059 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1060 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1061 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1062 | param->local_cm_response_timeout = | |
1063 | cm_req_get_remote_resp_timeout(req_msg); | |
1064 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1065 | param->remote_cm_response_timeout = | |
1066 | cm_req_get_local_resp_timeout(req_msg); | |
1067 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1068 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1069 | param->srq = cm_req_get_srq(req_msg); | |
1070 | work->cm_event.private_data = &req_msg->private_data; | |
1071 | } | |
1072 | ||
1073 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1074 | struct cm_work *work) | |
1075 | { | |
1076 | unsigned long flags; | |
1077 | int ret; | |
1078 | ||
1079 | /* We will typically only have the current event to report. */ | |
1080 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1081 | cm_free_work(work); | |
1082 | ||
1083 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
1084 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1085 | work = cm_dequeue_work(cm_id_priv); | |
1086 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1087 | BUG_ON(!work); | |
1088 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1089 | &work->cm_event); | |
1090 | cm_free_work(work); | |
1091 | } | |
1092 | cm_deref_id(cm_id_priv); | |
1093 | if (ret) | |
1094 | ib_destroy_cm_id(&cm_id_priv->id); | |
1095 | } | |
1096 | ||
1097 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1098 | struct cm_id_private *cm_id_priv, | |
1099 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1100 | const void *private_data, u8 private_data_len) | |
1101 | { | |
1102 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1103 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1104 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1105 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1106 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1107 | ||
1108 | if (private_data && private_data_len) | |
1109 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1110 | } | |
1111 | ||
1112 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1113 | struct cm_id_private *cm_id_priv, | |
1114 | enum ib_cm_rej_reason reason, | |
1115 | void *ari, | |
1116 | u8 ari_length, | |
1117 | const void *private_data, | |
1118 | u8 private_data_len) | |
1119 | { | |
1120 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1121 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1122 | ||
1123 | switch(cm_id_priv->id.state) { | |
1124 | case IB_CM_REQ_RCVD: | |
1125 | rej_msg->local_comm_id = 0; | |
1126 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1127 | break; | |
1128 | case IB_CM_MRA_REQ_SENT: | |
1129 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1130 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1131 | break; | |
1132 | case IB_CM_REP_RCVD: | |
1133 | case IB_CM_MRA_REP_SENT: | |
1134 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1135 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1136 | break; | |
1137 | default: | |
1138 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1139 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1140 | break; | |
1141 | } | |
1142 | ||
97f52eb4 | 1143 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1144 | if (ari && ari_length) { |
1145 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1146 | memcpy(rej_msg->ari, ari, ari_length); | |
1147 | } | |
1148 | ||
1149 | if (private_data && private_data_len) | |
1150 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1151 | } | |
1152 | ||
1153 | static void cm_dup_req_handler(struct cm_work *work, | |
1154 | struct cm_id_private *cm_id_priv) | |
1155 | { | |
1156 | struct ib_mad_send_buf *msg = NULL; | |
1157 | struct ib_send_wr *bad_send_wr; | |
1158 | unsigned long flags; | |
1159 | int ret; | |
1160 | ||
1161 | /* Quick state check to discard duplicate REQs. */ | |
1162 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1163 | return; | |
1164 | ||
1165 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1166 | if (ret) | |
1167 | return; | |
1168 | ||
1169 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1170 | switch (cm_id_priv->id.state) { | |
1171 | case IB_CM_MRA_REQ_SENT: | |
1172 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1173 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1174 | cm_id_priv->private_data, | |
1175 | cm_id_priv->private_data_len); | |
1176 | break; | |
1177 | case IB_CM_TIMEWAIT: | |
1178 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1179 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1180 | break; | |
1181 | default: | |
1182 | goto unlock; | |
1183 | } | |
1184 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1185 | ||
1186 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr, | |
1187 | &bad_send_wr); | |
1188 | if (ret) | |
1189 | goto free; | |
1190 | return; | |
1191 | ||
1192 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1193 | free: cm_free_msg(msg); | |
1194 | } | |
1195 | ||
1196 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1197 | struct cm_id_private *cm_id_priv) | |
1198 | { | |
1199 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1200 | struct cm_timewait_info *timewait_info; | |
1201 | struct cm_req_msg *req_msg; | |
1202 | unsigned long flags; | |
1203 | ||
1204 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1205 | ||
1206 | /* Check for duplicate REQ and stale connections. */ | |
1207 | spin_lock_irqsave(&cm.lock, flags); | |
1208 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); | |
1209 | if (!timewait_info) | |
1210 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1211 | ||
1212 | if (timewait_info) { | |
1213 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1214 | timewait_info->work.remote_id); | |
1215 | spin_unlock_irqrestore(&cm.lock, flags); | |
1216 | if (cur_cm_id_priv) { | |
1217 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1218 | cm_deref_id(cur_cm_id_priv); | |
1219 | } else | |
1220 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1221 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1222 | NULL, 0); | |
1223 | goto error; | |
1224 | } | |
1225 | ||
1226 | /* Find matching listen request. */ | |
1227 | listen_cm_id_priv = cm_find_listen(req_msg->service_id); | |
1228 | if (!listen_cm_id_priv) { | |
1229 | spin_unlock_irqrestore(&cm.lock, flags); | |
1230 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1231 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1232 | NULL, 0); | |
1233 | goto error; | |
1234 | } | |
1235 | atomic_inc(&listen_cm_id_priv->refcount); | |
1236 | atomic_inc(&cm_id_priv->refcount); | |
1237 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1238 | atomic_inc(&cm_id_priv->work_count); | |
1239 | spin_unlock_irqrestore(&cm.lock, flags); | |
1240 | return listen_cm_id_priv; | |
1241 | ||
1242 | error: cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1243 | return NULL; | |
1244 | } | |
1245 | ||
1246 | static int cm_req_handler(struct cm_work *work) | |
1247 | { | |
1248 | struct ib_cm_id *cm_id; | |
1249 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1250 | struct cm_req_msg *req_msg; | |
1251 | int ret; | |
1252 | ||
1253 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1254 | ||
1255 | cm_id = ib_create_cm_id(NULL, NULL); | |
1256 | if (IS_ERR(cm_id)) | |
1257 | return PTR_ERR(cm_id); | |
1258 | ||
1259 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1260 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1261 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
1262 | &cm_id_priv->av); | |
1263 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1264 | id.local_id); | |
1265 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1266 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
1267 | goto error1; | |
1268 | } | |
1269 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1270 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1271 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1272 | ||
1273 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1274 | if (!listen_cm_id_priv) { | |
1275 | ret = -EINVAL; | |
1276 | goto error2; | |
1277 | } | |
1278 | ||
1279 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1280 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1281 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1282 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1283 | |
1284 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); | |
1285 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
1286 | if (ret) | |
1287 | goto error3; | |
1288 | if (req_msg->alt_local_lid) { | |
1289 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
1290 | if (ret) | |
1291 | goto error3; | |
1292 | } | |
1293 | cm_id_priv->tid = req_msg->hdr.tid; | |
1294 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1295 | cm_req_get_local_resp_timeout(req_msg)); | |
1296 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1297 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1298 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1299 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1300 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
1301 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); | |
1302 | cm_id_priv->local_ack_timeout = | |
1303 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1304 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); | |
1305 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1306 | ||
1307 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1308 | cm_process_work(cm_id_priv, work); | |
1309 | cm_deref_id(listen_cm_id_priv); | |
1310 | return 0; | |
1311 | ||
1312 | error3: atomic_dec(&cm_id_priv->refcount); | |
1313 | cm_deref_id(listen_cm_id_priv); | |
1314 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1315 | error2: kfree(cm_id_priv->timewait_info); | |
1316 | error1: ib_destroy_cm_id(&cm_id_priv->id); | |
1317 | return ret; | |
1318 | } | |
1319 | ||
1320 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1321 | struct cm_id_private *cm_id_priv, | |
1322 | struct ib_cm_rep_param *param) | |
1323 | { | |
1324 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1325 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1326 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1327 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1328 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1329 | rep_msg->resp_resources = param->responder_resources; | |
1330 | rep_msg->initiator_depth = param->initiator_depth; | |
1331 | cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); | |
1332 | cm_rep_set_failover(rep_msg, param->failover_accepted); | |
1333 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1334 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1335 | cm_rep_set_srq(rep_msg, param->srq); | |
1336 | rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
1337 | ||
1338 | if (param->private_data && param->private_data_len) | |
1339 | memcpy(rep_msg->private_data, param->private_data, | |
1340 | param->private_data_len); | |
1341 | } | |
1342 | ||
1343 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1344 | struct ib_cm_rep_param *param) | |
1345 | { | |
1346 | struct cm_id_private *cm_id_priv; | |
1347 | struct ib_mad_send_buf *msg; | |
1348 | struct cm_rep_msg *rep_msg; | |
1349 | struct ib_send_wr *bad_send_wr; | |
1350 | unsigned long flags; | |
1351 | int ret; | |
1352 | ||
1353 | if (param->private_data && | |
1354 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1355 | return -EINVAL; | |
1356 | ||
1357 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1358 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1359 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1360 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1361 | ret = -EINVAL; | |
1362 | goto out; | |
1363 | } | |
1364 | ||
1365 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1366 | if (ret) | |
1367 | goto out; | |
1368 | ||
1369 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1370 | cm_format_rep(rep_msg, cm_id_priv, param); | |
1371 | msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
1372 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; | |
1373 | ||
1374 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1375 | &msg->send_wr, &bad_send_wr); | |
1376 | if (ret) { | |
1377 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1378 | cm_free_msg(msg); | |
1379 | return ret; | |
1380 | } | |
1381 | ||
1382 | cm_id->state = IB_CM_REP_SENT; | |
1383 | cm_id_priv->msg = msg; | |
1384 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1385 | cm_id_priv->responder_resources = param->responder_resources; | |
1386 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1387 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1388 | ||
1389 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1390 | return ret; | |
1391 | } | |
1392 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1393 | ||
1394 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1395 | struct cm_id_private *cm_id_priv, | |
1396 | const void *private_data, | |
1397 | u8 private_data_len) | |
1398 | { | |
1399 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1400 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1401 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1402 | ||
1403 | if (private_data && private_data_len) | |
1404 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1405 | } | |
1406 | ||
1407 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1408 | const void *private_data, | |
1409 | u8 private_data_len) | |
1410 | { | |
1411 | struct cm_id_private *cm_id_priv; | |
1412 | struct ib_mad_send_buf *msg; | |
1413 | struct ib_send_wr *bad_send_wr; | |
1414 | unsigned long flags; | |
1415 | void *data; | |
1416 | int ret; | |
1417 | ||
1418 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1419 | return -EINVAL; | |
1420 | ||
1421 | data = cm_copy_private_data(private_data, private_data_len); | |
1422 | if (IS_ERR(data)) | |
1423 | return PTR_ERR(data); | |
1424 | ||
1425 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1426 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1427 | if (cm_id->state != IB_CM_REP_RCVD && | |
1428 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1429 | ret = -EINVAL; | |
1430 | goto error; | |
1431 | } | |
1432 | ||
1433 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1434 | if (ret) | |
1435 | goto error; | |
1436 | ||
1437 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1438 | private_data, private_data_len); | |
1439 | ||
1440 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1441 | &msg->send_wr, &bad_send_wr); | |
1442 | if (ret) { | |
1443 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1444 | cm_free_msg(msg); | |
1445 | kfree(data); | |
1446 | return ret; | |
1447 | } | |
1448 | ||
1449 | cm_id->state = IB_CM_ESTABLISHED; | |
1450 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1451 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1452 | return 0; | |
1453 | ||
1454 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1455 | kfree(data); | |
1456 | return ret; | |
1457 | } | |
1458 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1459 | ||
1460 | static void cm_format_rep_event(struct cm_work *work) | |
1461 | { | |
1462 | struct cm_rep_msg *rep_msg; | |
1463 | struct ib_cm_rep_event_param *param; | |
1464 | ||
1465 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1466 | param = &work->cm_event.param.rep_rcvd; | |
1467 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1468 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1469 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1470 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1471 | param->responder_resources = rep_msg->initiator_depth; | |
1472 | param->initiator_depth = rep_msg->resp_resources; | |
1473 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1474 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1475 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1476 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1477 | param->srq = cm_rep_get_srq(rep_msg); | |
1478 | work->cm_event.private_data = &rep_msg->private_data; | |
1479 | } | |
1480 | ||
1481 | static void cm_dup_rep_handler(struct cm_work *work) | |
1482 | { | |
1483 | struct cm_id_private *cm_id_priv; | |
1484 | struct cm_rep_msg *rep_msg; | |
1485 | struct ib_mad_send_buf *msg = NULL; | |
1486 | struct ib_send_wr *bad_send_wr; | |
1487 | unsigned long flags; | |
1488 | int ret; | |
1489 | ||
1490 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1491 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1492 | rep_msg->local_comm_id); | |
1493 | if (!cm_id_priv) | |
1494 | return; | |
1495 | ||
1496 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1497 | if (ret) | |
1498 | goto deref; | |
1499 | ||
1500 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1501 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) | |
1502 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1503 | cm_id_priv->private_data, | |
1504 | cm_id_priv->private_data_len); | |
1505 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1506 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1507 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1508 | cm_id_priv->private_data, | |
1509 | cm_id_priv->private_data_len); | |
1510 | else | |
1511 | goto unlock; | |
1512 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1513 | ||
1514 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr, | |
1515 | &bad_send_wr); | |
1516 | if (ret) | |
1517 | goto free; | |
1518 | goto deref; | |
1519 | ||
1520 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1521 | free: cm_free_msg(msg); | |
1522 | deref: cm_deref_id(cm_id_priv); | |
1523 | } | |
1524 | ||
1525 | static int cm_rep_handler(struct cm_work *work) | |
1526 | { | |
1527 | struct cm_id_private *cm_id_priv; | |
1528 | struct cm_rep_msg *rep_msg; | |
1529 | unsigned long flags; | |
1530 | int ret; | |
1531 | ||
1532 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1533 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1534 | if (!cm_id_priv) { | |
1535 | cm_dup_rep_handler(work); | |
1536 | return -EINVAL; | |
1537 | } | |
1538 | ||
1539 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; | |
1540 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1541 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1542 | ||
1543 | spin_lock_irqsave(&cm.lock, flags); | |
1544 | /* Check for duplicate REP. */ | |
1545 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
1546 | spin_unlock_irqrestore(&cm.lock, flags); | |
1547 | ret = -EINVAL; | |
1548 | goto error; | |
1549 | } | |
1550 | /* Check for a stale connection. */ | |
1551 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
1552 | spin_unlock_irqrestore(&cm.lock, flags); | |
1553 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1554 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1555 | NULL, 0); | |
1556 | ret = -EINVAL; | |
1557 | goto error; | |
1558 | } | |
1559 | spin_unlock_irqrestore(&cm.lock, flags); | |
1560 | ||
1561 | cm_format_rep_event(work); | |
1562 | ||
1563 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1564 | switch (cm_id_priv->id.state) { | |
1565 | case IB_CM_REQ_SENT: | |
1566 | case IB_CM_MRA_REQ_RCVD: | |
1567 | break; | |
1568 | default: | |
1569 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1570 | ret = -EINVAL; | |
1571 | goto error; | |
1572 | } | |
1573 | cm_id_priv->id.state = IB_CM_REP_RCVD; | |
1574 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1575 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1576 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1577 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1578 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1579 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1580 | ||
1581 | /* todo: handle peer_to_peer */ | |
1582 | ||
1583 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1584 | (unsigned long) cm_id_priv->msg); | |
1585 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1586 | if (!ret) | |
1587 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1588 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1589 | ||
1590 | if (ret) | |
1591 | cm_process_work(cm_id_priv, work); | |
1592 | else | |
1593 | cm_deref_id(cm_id_priv); | |
1594 | return 0; | |
1595 | ||
1596 | error: cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1597 | cm_deref_id(cm_id_priv); | |
1598 | return ret; | |
1599 | } | |
1600 | ||
1601 | static int cm_establish_handler(struct cm_work *work) | |
1602 | { | |
1603 | struct cm_id_private *cm_id_priv; | |
1604 | unsigned long flags; | |
1605 | int ret; | |
1606 | ||
1607 | /* See comment in ib_cm_establish about lookup. */ | |
1608 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); | |
1609 | if (!cm_id_priv) | |
1610 | return -EINVAL; | |
1611 | ||
1612 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1613 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { | |
1614 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1615 | goto out; | |
1616 | } | |
1617 | ||
1618 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1619 | (unsigned long) cm_id_priv->msg); | |
1620 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1621 | if (!ret) | |
1622 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1623 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1624 | ||
1625 | if (ret) | |
1626 | cm_process_work(cm_id_priv, work); | |
1627 | else | |
1628 | cm_deref_id(cm_id_priv); | |
1629 | return 0; | |
1630 | out: | |
1631 | cm_deref_id(cm_id_priv); | |
1632 | return -EINVAL; | |
1633 | } | |
1634 | ||
1635 | static int cm_rtu_handler(struct cm_work *work) | |
1636 | { | |
1637 | struct cm_id_private *cm_id_priv; | |
1638 | struct cm_rtu_msg *rtu_msg; | |
1639 | unsigned long flags; | |
1640 | int ret; | |
1641 | ||
1642 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1643 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1644 | rtu_msg->local_comm_id); | |
1645 | if (!cm_id_priv) | |
1646 | return -EINVAL; | |
1647 | ||
1648 | work->cm_event.private_data = &rtu_msg->private_data; | |
1649 | ||
1650 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1651 | if (cm_id_priv->id.state != IB_CM_REP_SENT && | |
1652 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
1653 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1654 | goto out; | |
1655 | } | |
1656 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1657 | ||
1658 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1659 | (unsigned long) cm_id_priv->msg); | |
1660 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1661 | if (!ret) | |
1662 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1663 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1664 | ||
1665 | if (ret) | |
1666 | cm_process_work(cm_id_priv, work); | |
1667 | else | |
1668 | cm_deref_id(cm_id_priv); | |
1669 | return 0; | |
1670 | out: | |
1671 | cm_deref_id(cm_id_priv); | |
1672 | return -EINVAL; | |
1673 | } | |
1674 | ||
1675 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1676 | struct cm_id_private *cm_id_priv, | |
1677 | const void *private_data, | |
1678 | u8 private_data_len) | |
1679 | { | |
1680 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1681 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1682 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1683 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1684 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1685 | ||
1686 | if (private_data && private_data_len) | |
1687 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1688 | } | |
1689 | ||
1690 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1691 | const void *private_data, | |
1692 | u8 private_data_len) | |
1693 | { | |
1694 | struct cm_id_private *cm_id_priv; | |
1695 | struct ib_mad_send_buf *msg; | |
1696 | struct ib_send_wr *bad_send_wr; | |
1697 | unsigned long flags; | |
1698 | int ret; | |
1699 | ||
1700 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1701 | return -EINVAL; | |
1702 | ||
1703 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1704 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1705 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1706 | ret = -EINVAL; | |
1707 | goto out; | |
1708 | } | |
1709 | ||
1710 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1711 | if (ret) { | |
1712 | cm_enter_timewait(cm_id_priv); | |
1713 | goto out; | |
1714 | } | |
1715 | ||
1716 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1717 | private_data, private_data_len); | |
1718 | msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
1719 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; | |
1720 | ||
1721 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1722 | &msg->send_wr, &bad_send_wr); | |
1723 | if (ret) { | |
1724 | cm_enter_timewait(cm_id_priv); | |
1725 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1726 | cm_free_msg(msg); | |
1727 | return ret; | |
1728 | } | |
1729 | ||
1730 | cm_id->state = IB_CM_DREQ_SENT; | |
1731 | cm_id_priv->msg = msg; | |
1732 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1733 | return ret; | |
1734 | } | |
1735 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1736 | ||
1737 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1738 | struct cm_id_private *cm_id_priv, | |
1739 | const void *private_data, | |
1740 | u8 private_data_len) | |
1741 | { | |
1742 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1743 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1744 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1745 | ||
1746 | if (private_data && private_data_len) | |
1747 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
1748 | } | |
1749 | ||
1750 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
1751 | const void *private_data, | |
1752 | u8 private_data_len) | |
1753 | { | |
1754 | struct cm_id_private *cm_id_priv; | |
1755 | struct ib_mad_send_buf *msg; | |
1756 | struct ib_send_wr *bad_send_wr; | |
1757 | unsigned long flags; | |
1758 | void *data; | |
1759 | int ret; | |
1760 | ||
1761 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
1762 | return -EINVAL; | |
1763 | ||
1764 | data = cm_copy_private_data(private_data, private_data_len); | |
1765 | if (IS_ERR(data)) | |
1766 | return PTR_ERR(data); | |
1767 | ||
1768 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1769 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1770 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
1771 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1772 | kfree(data); | |
1773 | return -EINVAL; | |
1774 | } | |
1775 | ||
1776 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1777 | cm_enter_timewait(cm_id_priv); | |
1778 | ||
1779 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1780 | if (ret) | |
1781 | goto out; | |
1782 | ||
1783 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1784 | private_data, private_data_len); | |
1785 | ||
1786 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, &msg->send_wr, | |
1787 | &bad_send_wr); | |
1788 | if (ret) { | |
1789 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1790 | cm_free_msg(msg); | |
1791 | return ret; | |
1792 | } | |
1793 | ||
1794 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1795 | return ret; | |
1796 | } | |
1797 | EXPORT_SYMBOL(ib_send_cm_drep); | |
1798 | ||
1799 | static int cm_dreq_handler(struct cm_work *work) | |
1800 | { | |
1801 | struct cm_id_private *cm_id_priv; | |
1802 | struct cm_dreq_msg *dreq_msg; | |
1803 | struct ib_mad_send_buf *msg = NULL; | |
1804 | struct ib_send_wr *bad_send_wr; | |
1805 | unsigned long flags; | |
1806 | int ret; | |
1807 | ||
1808 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
1809 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
1810 | dreq_msg->local_comm_id); | |
1811 | if (!cm_id_priv) | |
1812 | return -EINVAL; | |
1813 | ||
1814 | work->cm_event.private_data = &dreq_msg->private_data; | |
1815 | ||
1816 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1817 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) | |
1818 | goto unlock; | |
1819 | ||
1820 | switch (cm_id_priv->id.state) { | |
1821 | case IB_CM_REP_SENT: | |
1822 | case IB_CM_DREQ_SENT: | |
1823 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1824 | (unsigned long) cm_id_priv->msg); | |
1825 | break; | |
1826 | case IB_CM_ESTABLISHED: | |
1827 | case IB_CM_MRA_REP_RCVD: | |
1828 | break; | |
1829 | case IB_CM_TIMEWAIT: | |
1830 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
1831 | goto unlock; | |
1832 | ||
1833 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1834 | cm_id_priv->private_data, | |
1835 | cm_id_priv->private_data_len); | |
1836 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1837 | ||
1838 | if (ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1839 | &msg->send_wr, &bad_send_wr)) | |
1840 | cm_free_msg(msg); | |
1841 | goto deref; | |
1842 | default: | |
1843 | goto unlock; | |
1844 | } | |
1845 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
1846 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
1847 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1848 | if (!ret) | |
1849 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1850 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1851 | ||
1852 | if (ret) | |
1853 | cm_process_work(cm_id_priv, work); | |
1854 | else | |
1855 | cm_deref_id(cm_id_priv); | |
1856 | return 0; | |
1857 | ||
1858 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1859 | deref: cm_deref_id(cm_id_priv); | |
1860 | return -EINVAL; | |
1861 | } | |
1862 | ||
1863 | static int cm_drep_handler(struct cm_work *work) | |
1864 | { | |
1865 | struct cm_id_private *cm_id_priv; | |
1866 | struct cm_drep_msg *drep_msg; | |
1867 | unsigned long flags; | |
1868 | int ret; | |
1869 | ||
1870 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1871 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
1872 | drep_msg->local_comm_id); | |
1873 | if (!cm_id_priv) | |
1874 | return -EINVAL; | |
1875 | ||
1876 | work->cm_event.private_data = &drep_msg->private_data; | |
1877 | ||
1878 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1879 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && | |
1880 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
1881 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1882 | goto out; | |
1883 | } | |
1884 | cm_enter_timewait(cm_id_priv); | |
1885 | ||
1886 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
1887 | (unsigned long) cm_id_priv->msg); | |
1888 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1889 | if (!ret) | |
1890 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1891 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1892 | ||
1893 | if (ret) | |
1894 | cm_process_work(cm_id_priv, work); | |
1895 | else | |
1896 | cm_deref_id(cm_id_priv); | |
1897 | return 0; | |
1898 | out: | |
1899 | cm_deref_id(cm_id_priv); | |
1900 | return -EINVAL; | |
1901 | } | |
1902 | ||
1903 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
1904 | enum ib_cm_rej_reason reason, | |
1905 | void *ari, | |
1906 | u8 ari_length, | |
1907 | const void *private_data, | |
1908 | u8 private_data_len) | |
1909 | { | |
1910 | struct cm_id_private *cm_id_priv; | |
1911 | struct ib_mad_send_buf *msg; | |
1912 | struct ib_send_wr *bad_send_wr; | |
1913 | unsigned long flags; | |
1914 | int ret; | |
1915 | ||
1916 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
1917 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
1918 | return -EINVAL; | |
1919 | ||
1920 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1921 | ||
1922 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1923 | switch (cm_id->state) { | |
1924 | case IB_CM_REQ_SENT: | |
1925 | case IB_CM_MRA_REQ_RCVD: | |
1926 | case IB_CM_REQ_RCVD: | |
1927 | case IB_CM_MRA_REQ_SENT: | |
1928 | case IB_CM_REP_RCVD: | |
1929 | case IB_CM_MRA_REP_SENT: | |
1930 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1931 | if (!ret) | |
1932 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
1933 | cm_id_priv, reason, ari, ari_length, | |
1934 | private_data, private_data_len); | |
1935 | ||
1936 | cm_reset_to_idle(cm_id_priv); | |
1937 | break; | |
1938 | case IB_CM_REP_SENT: | |
1939 | case IB_CM_MRA_REP_RCVD: | |
1940 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1941 | if (!ret) | |
1942 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
1943 | cm_id_priv, reason, ari, ari_length, | |
1944 | private_data, private_data_len); | |
1945 | ||
1946 | cm_enter_timewait(cm_id_priv); | |
1947 | break; | |
1948 | default: | |
1949 | ret = -EINVAL; | |
1950 | goto out; | |
1951 | } | |
1952 | ||
1953 | if (ret) | |
1954 | goto out; | |
1955 | ||
1956 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
1957 | &msg->send_wr, &bad_send_wr); | |
1958 | if (ret) | |
1959 | cm_free_msg(msg); | |
1960 | ||
1961 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1962 | return ret; | |
1963 | } | |
1964 | EXPORT_SYMBOL(ib_send_cm_rej); | |
1965 | ||
1966 | static void cm_format_rej_event(struct cm_work *work) | |
1967 | { | |
1968 | struct cm_rej_msg *rej_msg; | |
1969 | struct ib_cm_rej_event_param *param; | |
1970 | ||
1971 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
1972 | param = &work->cm_event.param.rej_rcvd; | |
1973 | param->ari = rej_msg->ari; | |
1974 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 1975 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
1976 | work->cm_event.private_data = &rej_msg->private_data; |
1977 | } | |
1978 | ||
1979 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
1980 | { | |
1981 | struct cm_timewait_info *timewait_info; | |
1982 | struct cm_id_private *cm_id_priv; | |
1983 | unsigned long flags; | |
97f52eb4 | 1984 | __be32 remote_id; |
a977049d HR |
1985 | |
1986 | remote_id = rej_msg->local_comm_id; | |
1987 | ||
97f52eb4 | 1988 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
a977049d | 1989 | spin_lock_irqsave(&cm.lock, flags); |
97f52eb4 | 1990 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
1991 | remote_id); |
1992 | if (!timewait_info) { | |
1993 | spin_unlock_irqrestore(&cm.lock, flags); | |
1994 | return NULL; | |
1995 | } | |
1996 | cm_id_priv = idr_find(&cm.local_id_table, | |
97f52eb4 | 1997 | (__force int) timewait_info->work.local_id); |
a977049d HR |
1998 | if (cm_id_priv) { |
1999 | if (cm_id_priv->id.remote_id == remote_id) | |
2000 | atomic_inc(&cm_id_priv->refcount); | |
2001 | else | |
2002 | cm_id_priv = NULL; | |
2003 | } | |
2004 | spin_unlock_irqrestore(&cm.lock, flags); | |
2005 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) | |
2006 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2007 | else | |
2008 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2009 | ||
2010 | return cm_id_priv; | |
2011 | } | |
2012 | ||
2013 | static int cm_rej_handler(struct cm_work *work) | |
2014 | { | |
2015 | struct cm_id_private *cm_id_priv; | |
2016 | struct cm_rej_msg *rej_msg; | |
2017 | unsigned long flags; | |
2018 | int ret; | |
2019 | ||
2020 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2021 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2022 | if (!cm_id_priv) | |
2023 | return -EINVAL; | |
2024 | ||
2025 | cm_format_rej_event(work); | |
2026 | ||
2027 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2028 | switch (cm_id_priv->id.state) { | |
2029 | case IB_CM_REQ_SENT: | |
2030 | case IB_CM_MRA_REQ_RCVD: | |
2031 | case IB_CM_REP_SENT: | |
2032 | case IB_CM_MRA_REP_RCVD: | |
2033 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2034 | (unsigned long) cm_id_priv->msg); | |
2035 | /* fall through */ | |
2036 | case IB_CM_REQ_RCVD: | |
2037 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2038 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2039 | cm_enter_timewait(cm_id_priv); |
2040 | else | |
2041 | cm_reset_to_idle(cm_id_priv); | |
2042 | break; | |
2043 | case IB_CM_DREQ_SENT: | |
2044 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2045 | (unsigned long) cm_id_priv->msg); | |
2046 | /* fall through */ | |
2047 | case IB_CM_REP_RCVD: | |
2048 | case IB_CM_MRA_REP_SENT: | |
2049 | case IB_CM_ESTABLISHED: | |
2050 | cm_enter_timewait(cm_id_priv); | |
2051 | break; | |
2052 | default: | |
2053 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2054 | ret = -EINVAL; | |
2055 | goto out; | |
2056 | } | |
2057 | ||
2058 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2059 | if (!ret) | |
2060 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2061 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2062 | ||
2063 | if (ret) | |
2064 | cm_process_work(cm_id_priv, work); | |
2065 | else | |
2066 | cm_deref_id(cm_id_priv); | |
2067 | return 0; | |
2068 | out: | |
2069 | cm_deref_id(cm_id_priv); | |
2070 | return -EINVAL; | |
2071 | } | |
2072 | ||
2073 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2074 | u8 service_timeout, | |
2075 | const void *private_data, | |
2076 | u8 private_data_len) | |
2077 | { | |
2078 | struct cm_id_private *cm_id_priv; | |
2079 | struct ib_mad_send_buf *msg; | |
2080 | struct ib_send_wr *bad_send_wr; | |
2081 | void *data; | |
2082 | unsigned long flags; | |
2083 | int ret; | |
2084 | ||
2085 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2086 | return -EINVAL; | |
2087 | ||
2088 | data = cm_copy_private_data(private_data, private_data_len); | |
2089 | if (IS_ERR(data)) | |
2090 | return PTR_ERR(data); | |
2091 | ||
2092 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2093 | ||
2094 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2095 | switch(cm_id_priv->id.state) { | |
2096 | case IB_CM_REQ_RCVD: | |
2097 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2098 | if (ret) | |
2099 | goto error1; | |
2100 | ||
2101 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2102 | CM_MSG_RESPONSE_REQ, service_timeout, | |
2103 | private_data, private_data_len); | |
2104 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2105 | &msg->send_wr, &bad_send_wr); | |
2106 | if (ret) | |
2107 | goto error2; | |
2108 | cm_id->state = IB_CM_MRA_REQ_SENT; | |
2109 | break; | |
2110 | case IB_CM_REP_RCVD: | |
2111 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2112 | if (ret) | |
2113 | goto error1; | |
2114 | ||
2115 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2116 | CM_MSG_RESPONSE_REP, service_timeout, | |
2117 | private_data, private_data_len); | |
2118 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2119 | &msg->send_wr, &bad_send_wr); | |
2120 | if (ret) | |
2121 | goto error2; | |
2122 | cm_id->state = IB_CM_MRA_REP_SENT; | |
2123 | break; | |
2124 | case IB_CM_ESTABLISHED: | |
2125 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2126 | if (ret) | |
2127 | goto error1; | |
2128 | ||
2129 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2130 | CM_MSG_RESPONSE_OTHER, service_timeout, | |
2131 | private_data, private_data_len); | |
2132 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2133 | &msg->send_wr, &bad_send_wr); | |
2134 | if (ret) | |
2135 | goto error2; | |
2136 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; | |
2137 | break; | |
2138 | default: | |
2139 | ret = -EINVAL; | |
2140 | goto error1; | |
2141 | } | |
2142 | cm_id_priv->service_timeout = service_timeout; | |
2143 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2144 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2145 | return 0; | |
2146 | ||
2147 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2148 | kfree(data); | |
2149 | return ret; | |
2150 | ||
2151 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2152 | kfree(data); | |
2153 | cm_free_msg(msg); | |
2154 | return ret; | |
2155 | } | |
2156 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2157 | ||
2158 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2159 | { | |
2160 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2161 | case CM_MSG_RESPONSE_REQ: | |
2162 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2163 | case CM_MSG_RESPONSE_REP: | |
2164 | case CM_MSG_RESPONSE_OTHER: | |
2165 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2166 | mra_msg->local_comm_id); | |
2167 | default: | |
2168 | return NULL; | |
2169 | } | |
2170 | } | |
2171 | ||
2172 | static int cm_mra_handler(struct cm_work *work) | |
2173 | { | |
2174 | struct cm_id_private *cm_id_priv; | |
2175 | struct cm_mra_msg *mra_msg; | |
2176 | unsigned long flags; | |
2177 | int timeout, ret; | |
2178 | ||
2179 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2180 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2181 | if (!cm_id_priv) | |
2182 | return -EINVAL; | |
2183 | ||
2184 | work->cm_event.private_data = &mra_msg->private_data; | |
2185 | work->cm_event.param.mra_rcvd.service_timeout = | |
2186 | cm_mra_get_service_timeout(mra_msg); | |
2187 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
2188 | cm_convert_to_ms(cm_id_priv->av.packet_life_time); | |
2189 | ||
2190 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2191 | switch (cm_id_priv->id.state) { | |
2192 | case IB_CM_REQ_SENT: | |
2193 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2194 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
2195 | (unsigned long) cm_id_priv->msg, timeout)) | |
2196 | goto out; | |
2197 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2198 | break; | |
2199 | case IB_CM_REP_SENT: | |
2200 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2201 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
2202 | (unsigned long) cm_id_priv->msg, timeout)) | |
2203 | goto out; | |
2204 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2205 | break; | |
2206 | case IB_CM_ESTABLISHED: | |
2207 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2208 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2209 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
2210 | (unsigned long) cm_id_priv->msg, timeout)) | |
2211 | goto out; | |
2212 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; | |
2213 | break; | |
2214 | default: | |
2215 | goto out; | |
2216 | } | |
2217 | ||
2218 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2219 | cm_id_priv->id.state; | |
2220 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2221 | if (!ret) | |
2222 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2223 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2224 | ||
2225 | if (ret) | |
2226 | cm_process_work(cm_id_priv, work); | |
2227 | else | |
2228 | cm_deref_id(cm_id_priv); | |
2229 | return 0; | |
2230 | out: | |
2231 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2232 | cm_deref_id(cm_id_priv); | |
2233 | return -EINVAL; | |
2234 | } | |
2235 | ||
2236 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2237 | struct cm_id_private *cm_id_priv, | |
2238 | struct ib_sa_path_rec *alternate_path, | |
2239 | const void *private_data, | |
2240 | u8 private_data_len) | |
2241 | { | |
2242 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2243 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2244 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2245 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2246 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2247 | /* todo: need remote CM response timeout */ | |
2248 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2249 | lap_msg->alt_local_lid = alternate_path->slid; | |
2250 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2251 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2252 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2253 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2254 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2255 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2256 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2257 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2258 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2259 | cm_lap_set_local_ack_timeout(lap_msg, | |
2260 | min(31, alternate_path->packet_life_time + 1)); | |
2261 | ||
2262 | if (private_data && private_data_len) | |
2263 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2264 | } | |
2265 | ||
2266 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2267 | struct ib_sa_path_rec *alternate_path, | |
2268 | const void *private_data, | |
2269 | u8 private_data_len) | |
2270 | { | |
2271 | struct cm_id_private *cm_id_priv; | |
2272 | struct ib_mad_send_buf *msg; | |
2273 | struct ib_send_wr *bad_send_wr; | |
2274 | unsigned long flags; | |
2275 | int ret; | |
2276 | ||
2277 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2278 | return -EINVAL; | |
2279 | ||
2280 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2281 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2282 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2283 | cm_id->lap_state != IB_CM_LAP_IDLE) { | |
2284 | ret = -EINVAL; | |
2285 | goto out; | |
2286 | } | |
2287 | ||
2288 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2289 | if (ret) | |
2290 | goto out; | |
2291 | ||
2292 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2293 | alternate_path, private_data, private_data_len); | |
2294 | msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
2295 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; | |
2296 | ||
2297 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2298 | &msg->send_wr, &bad_send_wr); | |
2299 | if (ret) { | |
2300 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2301 | cm_free_msg(msg); | |
2302 | return ret; | |
2303 | } | |
2304 | ||
2305 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2306 | cm_id_priv->msg = msg; | |
2307 | ||
2308 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2309 | return ret; | |
2310 | } | |
2311 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2312 | ||
2313 | static void cm_format_path_from_lap(struct ib_sa_path_rec *path, | |
2314 | struct cm_lap_msg *lap_msg) | |
2315 | { | |
2316 | memset(path, 0, sizeof *path); | |
2317 | path->dgid = lap_msg->alt_local_gid; | |
2318 | path->sgid = lap_msg->alt_remote_gid; | |
2319 | path->dlid = lap_msg->alt_local_lid; | |
2320 | path->slid = lap_msg->alt_remote_lid; | |
2321 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2322 | path->hop_limit = lap_msg->alt_hop_limit; | |
2323 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2324 | path->reversible = 1; | |
2325 | /* pkey is same as in REQ */ | |
2326 | path->sl = cm_lap_get_sl(lap_msg); | |
2327 | path->mtu_selector = IB_SA_EQ; | |
2328 | /* mtu is same as in REQ */ | |
2329 | path->rate_selector = IB_SA_EQ; | |
2330 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2331 | path->packet_life_time_selector = IB_SA_EQ; | |
2332 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2333 | path->packet_life_time -= (path->packet_life_time > 0); | |
2334 | } | |
2335 | ||
2336 | static int cm_lap_handler(struct cm_work *work) | |
2337 | { | |
2338 | struct cm_id_private *cm_id_priv; | |
2339 | struct cm_lap_msg *lap_msg; | |
2340 | struct ib_cm_lap_event_param *param; | |
2341 | struct ib_mad_send_buf *msg = NULL; | |
2342 | struct ib_send_wr *bad_send_wr; | |
2343 | unsigned long flags; | |
2344 | int ret; | |
2345 | ||
2346 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2347 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2348 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2349 | lap_msg->local_comm_id); | |
2350 | if (!cm_id_priv) | |
2351 | return -EINVAL; | |
2352 | ||
2353 | param = &work->cm_event.param.lap_rcvd; | |
2354 | param->alternate_path = &work->path[0]; | |
2355 | cm_format_path_from_lap(param->alternate_path, lap_msg); | |
2356 | work->cm_event.private_data = &lap_msg->private_data; | |
2357 | ||
2358 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2359 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) | |
2360 | goto unlock; | |
2361 | ||
2362 | switch (cm_id_priv->id.lap_state) { | |
2363 | case IB_CM_LAP_IDLE: | |
2364 | break; | |
2365 | case IB_CM_MRA_LAP_SENT: | |
2366 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
2367 | goto unlock; | |
2368 | ||
2369 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2370 | CM_MSG_RESPONSE_OTHER, | |
2371 | cm_id_priv->service_timeout, | |
2372 | cm_id_priv->private_data, | |
2373 | cm_id_priv->private_data_len); | |
2374 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2375 | ||
2376 | if (ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2377 | &msg->send_wr, &bad_send_wr)) | |
2378 | cm_free_msg(msg); | |
2379 | goto deref; | |
2380 | default: | |
2381 | goto unlock; | |
2382 | } | |
2383 | ||
2384 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2385 | cm_id_priv->tid = lap_msg->hdr.tid; | |
2386 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2387 | if (!ret) | |
2388 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2389 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2390 | ||
2391 | if (ret) | |
2392 | cm_process_work(cm_id_priv, work); | |
2393 | else | |
2394 | cm_deref_id(cm_id_priv); | |
2395 | return 0; | |
2396 | ||
2397 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2398 | deref: cm_deref_id(cm_id_priv); | |
2399 | return -EINVAL; | |
2400 | } | |
2401 | ||
2402 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2403 | struct cm_id_private *cm_id_priv, | |
2404 | enum ib_cm_apr_status status, | |
2405 | void *info, | |
2406 | u8 info_length, | |
2407 | const void *private_data, | |
2408 | u8 private_data_len) | |
2409 | { | |
2410 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2411 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2412 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2413 | apr_msg->ap_status = (u8) status; | |
2414 | ||
2415 | if (info && info_length) { | |
2416 | apr_msg->info_length = info_length; | |
2417 | memcpy(apr_msg->info, info, info_length); | |
2418 | } | |
2419 | ||
2420 | if (private_data && private_data_len) | |
2421 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2422 | } | |
2423 | ||
2424 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2425 | enum ib_cm_apr_status status, | |
2426 | void *info, | |
2427 | u8 info_length, | |
2428 | const void *private_data, | |
2429 | u8 private_data_len) | |
2430 | { | |
2431 | struct cm_id_private *cm_id_priv; | |
2432 | struct ib_mad_send_buf *msg; | |
2433 | struct ib_send_wr *bad_send_wr; | |
2434 | unsigned long flags; | |
2435 | int ret; | |
2436 | ||
2437 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2438 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2439 | return -EINVAL; | |
2440 | ||
2441 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2442 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2443 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2444 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2445 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2446 | ret = -EINVAL; | |
2447 | goto out; | |
2448 | } | |
2449 | ||
2450 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2451 | if (ret) | |
2452 | goto out; | |
2453 | ||
2454 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2455 | info, info_length, private_data, private_data_len); | |
2456 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2457 | &msg->send_wr, &bad_send_wr); | |
2458 | if (ret) { | |
2459 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2460 | cm_free_msg(msg); | |
2461 | return ret; | |
2462 | } | |
2463 | ||
2464 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2465 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2466 | return ret; | |
2467 | } | |
2468 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2469 | ||
2470 | static int cm_apr_handler(struct cm_work *work) | |
2471 | { | |
2472 | struct cm_id_private *cm_id_priv; | |
2473 | struct cm_apr_msg *apr_msg; | |
2474 | unsigned long flags; | |
2475 | int ret; | |
2476 | ||
2477 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2478 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2479 | apr_msg->local_comm_id); | |
2480 | if (!cm_id_priv) | |
2481 | return -EINVAL; /* Unmatched reply. */ | |
2482 | ||
2483 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2484 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2485 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2486 | work->cm_event.private_data = &apr_msg->private_data; | |
2487 | ||
2488 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2489 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || | |
2490 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2491 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
2492 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2493 | goto out; | |
2494 | } | |
2495 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
2496 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2497 | (unsigned long) cm_id_priv->msg); | |
2498 | cm_id_priv->msg = NULL; | |
2499 | ||
2500 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2501 | if (!ret) | |
2502 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2503 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2504 | ||
2505 | if (ret) | |
2506 | cm_process_work(cm_id_priv, work); | |
2507 | else | |
2508 | cm_deref_id(cm_id_priv); | |
2509 | return 0; | |
2510 | out: | |
2511 | cm_deref_id(cm_id_priv); | |
2512 | return -EINVAL; | |
2513 | } | |
2514 | ||
2515 | static int cm_timewait_handler(struct cm_work *work) | |
2516 | { | |
2517 | struct cm_timewait_info *timewait_info; | |
2518 | struct cm_id_private *cm_id_priv; | |
2519 | unsigned long flags; | |
2520 | int ret; | |
2521 | ||
2522 | timewait_info = (struct cm_timewait_info *)work; | |
2523 | cm_cleanup_timewait(timewait_info); | |
2524 | ||
2525 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2526 | timewait_info->work.remote_id); | |
2527 | if (!cm_id_priv) | |
2528 | return -EINVAL; | |
2529 | ||
2530 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2531 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || | |
2532 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
2533 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2534 | goto out; | |
2535 | } | |
2536 | cm_id_priv->id.state = IB_CM_IDLE; | |
2537 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2538 | if (!ret) | |
2539 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2540 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2541 | ||
2542 | if (ret) | |
2543 | cm_process_work(cm_id_priv, work); | |
2544 | else | |
2545 | cm_deref_id(cm_id_priv); | |
2546 | return 0; | |
2547 | out: | |
2548 | cm_deref_id(cm_id_priv); | |
2549 | return -EINVAL; | |
2550 | } | |
2551 | ||
2552 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2553 | struct cm_id_private *cm_id_priv, | |
2554 | struct ib_cm_sidr_req_param *param) | |
2555 | { | |
2556 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2557 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2558 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
97f52eb4 | 2559 | sidr_req_msg->pkey = cpu_to_be16(param->pkey); |
a977049d HR |
2560 | sidr_req_msg->service_id = param->service_id; |
2561 | ||
2562 | if (param->private_data && param->private_data_len) | |
2563 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2564 | param->private_data_len); | |
2565 | } | |
2566 | ||
2567 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2568 | struct ib_cm_sidr_req_param *param) | |
2569 | { | |
2570 | struct cm_id_private *cm_id_priv; | |
2571 | struct ib_mad_send_buf *msg; | |
2572 | struct ib_send_wr *bad_send_wr; | |
2573 | unsigned long flags; | |
2574 | int ret; | |
2575 | ||
2576 | if (!param->path || (param->private_data && | |
2577 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2578 | return -EINVAL; | |
2579 | ||
2580 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2581 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2582 | if (ret) | |
2583 | goto out; | |
2584 | ||
2585 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2586 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2587 | cm_id_priv->timeout_ms = param->timeout_ms; |
2588 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2589 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2590 | if (ret) | |
2591 | goto out; | |
2592 | ||
2593 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2594 | param); | |
2595 | msg->send_wr.wr.ud.timeout_ms = cm_id_priv->timeout_ms; | |
2596 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; | |
2597 | ||
2598 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2599 | if (cm_id->state == IB_CM_IDLE) | |
2600 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2601 | &msg->send_wr, &bad_send_wr); | |
2602 | else | |
2603 | ret = -EINVAL; | |
2604 | ||
2605 | if (ret) { | |
2606 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2607 | cm_free_msg(msg); | |
2608 | goto out; | |
2609 | } | |
2610 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2611 | cm_id_priv->msg = msg; | |
2612 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2613 | out: | |
2614 | return ret; | |
2615 | } | |
2616 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2617 | ||
2618 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2619 | struct ib_cm_id *listen_id) | |
2620 | { | |
2621 | struct cm_sidr_req_msg *sidr_req_msg; | |
2622 | struct ib_cm_sidr_req_event_param *param; | |
2623 | ||
2624 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2625 | work->mad_recv_wc->recv_buf.mad; | |
2626 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2627 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d HR |
2628 | param->listen_id = listen_id; |
2629 | param->device = work->port->mad_agent->device; | |
2630 | param->port = work->port->port_num; | |
2631 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2632 | } | |
2633 | ||
2634 | static int cm_sidr_req_handler(struct cm_work *work) | |
2635 | { | |
2636 | struct ib_cm_id *cm_id; | |
2637 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2638 | struct cm_sidr_req_msg *sidr_req_msg; | |
2639 | struct ib_wc *wc; | |
2640 | unsigned long flags; | |
2641 | ||
2642 | cm_id = ib_create_cm_id(NULL, NULL); | |
2643 | if (IS_ERR(cm_id)) | |
2644 | return PTR_ERR(cm_id); | |
2645 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2646 | ||
2647 | /* Record SGID/SLID and request ID for lookup. */ | |
2648 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2649 | work->mad_recv_wc->recv_buf.mad; | |
2650 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2651 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2652 | cm_id_priv->av.dgid.global.interface_id = 0; |
2653 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
2654 | &cm_id_priv->av); | |
2655 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
2656 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; | |
2657 | cm_id_priv->tid = sidr_req_msg->hdr.tid; | |
2658 | atomic_inc(&cm_id_priv->work_count); | |
2659 | ||
2660 | spin_lock_irqsave(&cm.lock, flags); | |
2661 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); | |
2662 | if (cur_cm_id_priv) { | |
2663 | spin_unlock_irqrestore(&cm.lock, flags); | |
2664 | goto out; /* Duplicate message. */ | |
2665 | } | |
2666 | cur_cm_id_priv = cm_find_listen(sidr_req_msg->service_id); | |
2667 | if (!cur_cm_id_priv) { | |
2668 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2669 | spin_unlock_irqrestore(&cm.lock, flags); | |
2670 | /* todo: reply with no match */ | |
2671 | goto out; /* No match. */ | |
2672 | } | |
2673 | atomic_inc(&cur_cm_id_priv->refcount); | |
2674 | spin_unlock_irqrestore(&cm.lock, flags); | |
2675 | ||
2676 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2677 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2678 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2679 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2680 | |
2681 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2682 | cm_process_work(cm_id_priv, work); | |
2683 | cm_deref_id(cur_cm_id_priv); | |
2684 | return 0; | |
2685 | out: | |
2686 | ib_destroy_cm_id(&cm_id_priv->id); | |
2687 | return -EINVAL; | |
2688 | } | |
2689 | ||
2690 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2691 | struct cm_id_private *cm_id_priv, | |
2692 | struct ib_cm_sidr_rep_param *param) | |
2693 | { | |
2694 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2695 | cm_id_priv->tid); | |
2696 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2697 | sidr_rep_msg->status = param->status; | |
2698 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2699 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2700 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2701 | ||
2702 | if (param->info && param->info_length) | |
2703 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2704 | ||
2705 | if (param->private_data && param->private_data_len) | |
2706 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2707 | param->private_data_len); | |
2708 | } | |
2709 | ||
2710 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
2711 | struct ib_cm_sidr_rep_param *param) | |
2712 | { | |
2713 | struct cm_id_private *cm_id_priv; | |
2714 | struct ib_mad_send_buf *msg; | |
2715 | struct ib_send_wr *bad_send_wr; | |
2716 | unsigned long flags; | |
2717 | int ret; | |
2718 | ||
2719 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
2720 | (param->private_data && | |
2721 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
2722 | return -EINVAL; | |
2723 | ||
2724 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2725 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2726 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
2727 | ret = -EINVAL; | |
2728 | goto error; | |
2729 | } | |
2730 | ||
2731 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2732 | if (ret) | |
2733 | goto error; | |
2734 | ||
2735 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
2736 | param); | |
2737 | ret = ib_post_send_mad(cm_id_priv->av.port->mad_agent, | |
2738 | &msg->send_wr, &bad_send_wr); | |
2739 | if (ret) { | |
2740 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2741 | cm_free_msg(msg); | |
2742 | return ret; | |
2743 | } | |
2744 | cm_id->state = IB_CM_IDLE; | |
2745 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2746 | ||
2747 | spin_lock_irqsave(&cm.lock, flags); | |
2748 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2749 | spin_unlock_irqrestore(&cm.lock, flags); | |
2750 | return 0; | |
2751 | ||
2752 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2753 | return ret; | |
2754 | } | |
2755 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
2756 | ||
2757 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
2758 | { | |
2759 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2760 | struct ib_cm_sidr_rep_event_param *param; | |
2761 | ||
2762 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2763 | work->mad_recv_wc->recv_buf.mad; | |
2764 | param = &work->cm_event.param.sidr_rep_rcvd; | |
2765 | param->status = sidr_rep_msg->status; | |
2766 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
2767 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
2768 | param->info = &sidr_rep_msg->info; | |
2769 | param->info_len = sidr_rep_msg->info_length; | |
2770 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
2771 | } | |
2772 | ||
2773 | static int cm_sidr_rep_handler(struct cm_work *work) | |
2774 | { | |
2775 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2776 | struct cm_id_private *cm_id_priv; | |
2777 | unsigned long flags; | |
2778 | ||
2779 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2780 | work->mad_recv_wc->recv_buf.mad; | |
2781 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
2782 | if (!cm_id_priv) | |
2783 | return -EINVAL; /* Unmatched reply. */ | |
2784 | ||
2785 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2786 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { | |
2787 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2788 | goto out; | |
2789 | } | |
2790 | cm_id_priv->id.state = IB_CM_IDLE; | |
2791 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2792 | (unsigned long) cm_id_priv->msg); | |
2793 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2794 | ||
2795 | cm_format_sidr_rep_event(work); | |
2796 | cm_process_work(cm_id_priv, work); | |
2797 | return 0; | |
2798 | out: | |
2799 | cm_deref_id(cm_id_priv); | |
2800 | return -EINVAL; | |
2801 | } | |
2802 | ||
2803 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
2804 | enum ib_wc_status wc_status) | |
2805 | { | |
2806 | struct cm_id_private *cm_id_priv; | |
2807 | struct ib_cm_event cm_event; | |
2808 | enum ib_cm_state state; | |
2809 | unsigned long flags; | |
2810 | int ret; | |
2811 | ||
2812 | memset(&cm_event, 0, sizeof cm_event); | |
2813 | cm_id_priv = msg->context[0]; | |
2814 | ||
2815 | /* Discard old sends or ones without a response. */ | |
2816 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2817 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; | |
2818 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
2819 | goto discard; | |
2820 | ||
2821 | switch (state) { | |
2822 | case IB_CM_REQ_SENT: | |
2823 | case IB_CM_MRA_REQ_RCVD: | |
2824 | cm_reset_to_idle(cm_id_priv); | |
2825 | cm_event.event = IB_CM_REQ_ERROR; | |
2826 | break; | |
2827 | case IB_CM_REP_SENT: | |
2828 | case IB_CM_MRA_REP_RCVD: | |
2829 | cm_reset_to_idle(cm_id_priv); | |
2830 | cm_event.event = IB_CM_REP_ERROR; | |
2831 | break; | |
2832 | case IB_CM_DREQ_SENT: | |
2833 | cm_enter_timewait(cm_id_priv); | |
2834 | cm_event.event = IB_CM_DREQ_ERROR; | |
2835 | break; | |
2836 | case IB_CM_SIDR_REQ_SENT: | |
2837 | cm_id_priv->id.state = IB_CM_IDLE; | |
2838 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
2839 | break; | |
2840 | default: | |
2841 | goto discard; | |
2842 | } | |
2843 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2844 | cm_event.param.send_status = wc_status; | |
2845 | ||
2846 | /* No other events can occur on the cm_id at this point. */ | |
2847 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
2848 | cm_free_msg(msg); | |
2849 | if (ret) | |
2850 | ib_destroy_cm_id(&cm_id_priv->id); | |
2851 | return; | |
2852 | discard: | |
2853 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2854 | cm_free_msg(msg); | |
2855 | } | |
2856 | ||
2857 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
2858 | struct ib_mad_send_wc *mad_send_wc) | |
2859 | { | |
2860 | struct ib_mad_send_buf *msg; | |
2861 | ||
2862 | msg = (struct ib_mad_send_buf *)(unsigned long)mad_send_wc->wr_id; | |
2863 | ||
2864 | switch (mad_send_wc->status) { | |
2865 | case IB_WC_SUCCESS: | |
2866 | case IB_WC_WR_FLUSH_ERR: | |
2867 | cm_free_msg(msg); | |
2868 | break; | |
2869 | default: | |
2870 | if (msg->context[0] && msg->context[1]) | |
2871 | cm_process_send_error(msg, mad_send_wc->status); | |
2872 | else | |
2873 | cm_free_msg(msg); | |
2874 | break; | |
2875 | } | |
2876 | } | |
2877 | ||
2878 | static void cm_work_handler(void *data) | |
2879 | { | |
2880 | struct cm_work *work = data; | |
2881 | int ret; | |
2882 | ||
2883 | switch (work->cm_event.event) { | |
2884 | case IB_CM_REQ_RECEIVED: | |
2885 | ret = cm_req_handler(work); | |
2886 | break; | |
2887 | case IB_CM_MRA_RECEIVED: | |
2888 | ret = cm_mra_handler(work); | |
2889 | break; | |
2890 | case IB_CM_REJ_RECEIVED: | |
2891 | ret = cm_rej_handler(work); | |
2892 | break; | |
2893 | case IB_CM_REP_RECEIVED: | |
2894 | ret = cm_rep_handler(work); | |
2895 | break; | |
2896 | case IB_CM_RTU_RECEIVED: | |
2897 | ret = cm_rtu_handler(work); | |
2898 | break; | |
2899 | case IB_CM_USER_ESTABLISHED: | |
2900 | ret = cm_establish_handler(work); | |
2901 | break; | |
2902 | case IB_CM_DREQ_RECEIVED: | |
2903 | ret = cm_dreq_handler(work); | |
2904 | break; | |
2905 | case IB_CM_DREP_RECEIVED: | |
2906 | ret = cm_drep_handler(work); | |
2907 | break; | |
2908 | case IB_CM_SIDR_REQ_RECEIVED: | |
2909 | ret = cm_sidr_req_handler(work); | |
2910 | break; | |
2911 | case IB_CM_SIDR_REP_RECEIVED: | |
2912 | ret = cm_sidr_rep_handler(work); | |
2913 | break; | |
2914 | case IB_CM_LAP_RECEIVED: | |
2915 | ret = cm_lap_handler(work); | |
2916 | break; | |
2917 | case IB_CM_APR_RECEIVED: | |
2918 | ret = cm_apr_handler(work); | |
2919 | break; | |
2920 | case IB_CM_TIMEWAIT_EXIT: | |
2921 | ret = cm_timewait_handler(work); | |
2922 | break; | |
2923 | default: | |
2924 | ret = -EINVAL; | |
2925 | break; | |
2926 | } | |
2927 | if (ret) | |
2928 | cm_free_work(work); | |
2929 | } | |
2930 | ||
2931 | int ib_cm_establish(struct ib_cm_id *cm_id) | |
2932 | { | |
2933 | struct cm_id_private *cm_id_priv; | |
2934 | struct cm_work *work; | |
2935 | unsigned long flags; | |
2936 | int ret = 0; | |
2937 | ||
2938 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
2939 | if (!work) | |
2940 | return -ENOMEM; | |
2941 | ||
2942 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2943 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2944 | switch (cm_id->state) | |
2945 | { | |
2946 | case IB_CM_REP_SENT: | |
2947 | case IB_CM_MRA_REP_RCVD: | |
2948 | cm_id->state = IB_CM_ESTABLISHED; | |
2949 | break; | |
2950 | case IB_CM_ESTABLISHED: | |
2951 | ret = -EISCONN; | |
2952 | break; | |
2953 | default: | |
2954 | ret = -EINVAL; | |
2955 | break; | |
2956 | } | |
2957 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2958 | ||
2959 | if (ret) { | |
2960 | kfree(work); | |
2961 | goto out; | |
2962 | } | |
2963 | ||
2964 | /* | |
2965 | * The CM worker thread may try to destroy the cm_id before it | |
2966 | * can execute this work item. To prevent potential deadlock, | |
2967 | * we need to find the cm_id once we're in the context of the | |
2968 | * worker thread, rather than holding a reference on it. | |
2969 | */ | |
2970 | INIT_WORK(&work->work, cm_work_handler, work); | |
2971 | work->local_id = cm_id->local_id; | |
2972 | work->remote_id = cm_id->remote_id; | |
2973 | work->mad_recv_wc = NULL; | |
2974 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
2975 | queue_work(cm.wq, &work->work); | |
2976 | out: | |
2977 | return ret; | |
2978 | } | |
2979 | EXPORT_SYMBOL(ib_cm_establish); | |
2980 | ||
2981 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
2982 | struct ib_mad_recv_wc *mad_recv_wc) | |
2983 | { | |
2984 | struct cm_work *work; | |
2985 | enum ib_cm_event_type event; | |
2986 | int paths = 0; | |
2987 | ||
2988 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
2989 | case CM_REQ_ATTR_ID: | |
2990 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
2991 | alt_local_lid != 0); | |
2992 | event = IB_CM_REQ_RECEIVED; | |
2993 | break; | |
2994 | case CM_MRA_ATTR_ID: | |
2995 | event = IB_CM_MRA_RECEIVED; | |
2996 | break; | |
2997 | case CM_REJ_ATTR_ID: | |
2998 | event = IB_CM_REJ_RECEIVED; | |
2999 | break; | |
3000 | case CM_REP_ATTR_ID: | |
3001 | event = IB_CM_REP_RECEIVED; | |
3002 | break; | |
3003 | case CM_RTU_ATTR_ID: | |
3004 | event = IB_CM_RTU_RECEIVED; | |
3005 | break; | |
3006 | case CM_DREQ_ATTR_ID: | |
3007 | event = IB_CM_DREQ_RECEIVED; | |
3008 | break; | |
3009 | case CM_DREP_ATTR_ID: | |
3010 | event = IB_CM_DREP_RECEIVED; | |
3011 | break; | |
3012 | case CM_SIDR_REQ_ATTR_ID: | |
3013 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3014 | break; | |
3015 | case CM_SIDR_REP_ATTR_ID: | |
3016 | event = IB_CM_SIDR_REP_RECEIVED; | |
3017 | break; | |
3018 | case CM_LAP_ATTR_ID: | |
3019 | paths = 1; | |
3020 | event = IB_CM_LAP_RECEIVED; | |
3021 | break; | |
3022 | case CM_APR_ATTR_ID: | |
3023 | event = IB_CM_APR_RECEIVED; | |
3024 | break; | |
3025 | default: | |
3026 | ib_free_recv_mad(mad_recv_wc); | |
3027 | return; | |
3028 | } | |
3029 | ||
3030 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, | |
3031 | GFP_KERNEL); | |
3032 | if (!work) { | |
3033 | ib_free_recv_mad(mad_recv_wc); | |
3034 | return; | |
3035 | } | |
3036 | ||
3037 | INIT_WORK(&work->work, cm_work_handler, work); | |
3038 | work->cm_event.event = event; | |
3039 | work->mad_recv_wc = mad_recv_wc; | |
3040 | work->port = (struct cm_port *)mad_agent->context; | |
3041 | queue_work(cm.wq, &work->work); | |
3042 | } | |
3043 | ||
3044 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3045 | struct ib_qp_attr *qp_attr, | |
3046 | int *qp_attr_mask) | |
3047 | { | |
3048 | unsigned long flags; | |
3049 | int ret; | |
3050 | ||
3051 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3052 | switch (cm_id_priv->id.state) { | |
3053 | case IB_CM_REQ_SENT: | |
3054 | case IB_CM_MRA_REQ_RCVD: | |
3055 | case IB_CM_REQ_RCVD: | |
3056 | case IB_CM_MRA_REQ_SENT: | |
3057 | case IB_CM_REP_RCVD: | |
3058 | case IB_CM_MRA_REP_SENT: | |
3059 | case IB_CM_REP_SENT: | |
3060 | case IB_CM_MRA_REP_RCVD: | |
3061 | case IB_CM_ESTABLISHED: | |
3062 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3063 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
3064 | qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE; | |
3065 | if (cm_id_priv->responder_resources) | |
3066 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_WRITE | | |
3067 | IB_ACCESS_REMOTE_READ; | |
3068 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; | |
3069 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3070 | ret = 0; | |
3071 | break; | |
3072 | default: | |
3073 | ret = -EINVAL; | |
3074 | break; | |
3075 | } | |
3076 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3077 | return ret; | |
3078 | } | |
3079 | ||
3080 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3081 | struct ib_qp_attr *qp_attr, | |
3082 | int *qp_attr_mask) | |
3083 | { | |
3084 | unsigned long flags; | |
3085 | int ret; | |
3086 | ||
3087 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3088 | switch (cm_id_priv->id.state) { | |
3089 | case IB_CM_REQ_RCVD: | |
3090 | case IB_CM_MRA_REQ_SENT: | |
3091 | case IB_CM_REP_RCVD: | |
3092 | case IB_CM_MRA_REP_SENT: | |
3093 | case IB_CM_REP_SENT: | |
3094 | case IB_CM_MRA_REP_RCVD: | |
3095 | case IB_CM_ESTABLISHED: | |
3096 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
3097 | IB_QP_DEST_QPN | IB_QP_RQ_PSN | | |
3098 | IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER; | |
3099 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; | |
3100 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3101 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3102 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
3103 | qp_attr->max_dest_rd_atomic = cm_id_priv->responder_resources; | |
3104 | qp_attr->min_rnr_timer = 0; | |
3105 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3106 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
3107 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; | |
3108 | } | |
3109 | ret = 0; | |
3110 | break; | |
3111 | default: | |
3112 | ret = -EINVAL; | |
3113 | break; | |
3114 | } | |
3115 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3116 | return ret; | |
3117 | } | |
3118 | ||
3119 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3120 | struct ib_qp_attr *qp_attr, | |
3121 | int *qp_attr_mask) | |
3122 | { | |
3123 | unsigned long flags; | |
3124 | int ret; | |
3125 | ||
3126 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3127 | switch (cm_id_priv->id.state) { | |
3128 | case IB_CM_REP_RCVD: | |
3129 | case IB_CM_MRA_REP_SENT: | |
3130 | case IB_CM_REP_SENT: | |
3131 | case IB_CM_MRA_REP_RCVD: | |
3132 | case IB_CM_ESTABLISHED: | |
3133 | *qp_attr_mask = IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3134 | IB_QP_RNR_RETRY | IB_QP_SQ_PSN | | |
3135 | IB_QP_MAX_QP_RD_ATOMIC; | |
3136 | qp_attr->timeout = cm_id_priv->local_ack_timeout; | |
3137 | qp_attr->retry_cnt = cm_id_priv->retry_count; | |
3138 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3139 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
3140 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; | |
3141 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3142 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3143 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3144 | } | |
3145 | ret = 0; | |
3146 | break; | |
3147 | default: | |
3148 | ret = -EINVAL; | |
3149 | break; | |
3150 | } | |
3151 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3152 | return ret; | |
3153 | } | |
3154 | ||
3155 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3156 | struct ib_qp_attr *qp_attr, | |
3157 | int *qp_attr_mask) | |
3158 | { | |
3159 | struct cm_id_private *cm_id_priv; | |
3160 | int ret; | |
3161 | ||
3162 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3163 | switch (qp_attr->qp_state) { | |
3164 | case IB_QPS_INIT: | |
3165 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3166 | break; | |
3167 | case IB_QPS_RTR: | |
3168 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3169 | break; | |
3170 | case IB_QPS_RTS: | |
3171 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3172 | break; | |
3173 | default: | |
3174 | ret = -EINVAL; | |
3175 | break; | |
3176 | } | |
3177 | return ret; | |
3178 | } | |
3179 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3180 | ||
97f52eb4 | 3181 | static __be64 cm_get_ca_guid(struct ib_device *device) |
a977049d HR |
3182 | { |
3183 | struct ib_device_attr *device_attr; | |
97f52eb4 | 3184 | __be64 guid; |
a977049d HR |
3185 | int ret; |
3186 | ||
3187 | device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); | |
3188 | if (!device_attr) | |
3189 | return 0; | |
3190 | ||
3191 | ret = ib_query_device(device, device_attr); | |
3192 | guid = ret ? 0 : device_attr->node_guid; | |
3193 | kfree(device_attr); | |
3194 | return guid; | |
3195 | } | |
3196 | ||
3197 | static void cm_add_one(struct ib_device *device) | |
3198 | { | |
3199 | struct cm_device *cm_dev; | |
3200 | struct cm_port *port; | |
3201 | struct ib_mad_reg_req reg_req = { | |
3202 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3203 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3204 | }; | |
3205 | struct ib_port_modify port_modify = { | |
3206 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3207 | }; | |
3208 | unsigned long flags; | |
3209 | int ret; | |
3210 | u8 i; | |
3211 | ||
3212 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * | |
3213 | device->phys_port_cnt, GFP_KERNEL); | |
3214 | if (!cm_dev) | |
3215 | return; | |
3216 | ||
3217 | cm_dev->device = device; | |
3218 | cm_dev->ca_guid = cm_get_ca_guid(device); | |
3219 | if (!cm_dev->ca_guid) | |
3220 | goto error1; | |
3221 | ||
3222 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); | |
3223 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3224 | port = &cm_dev->port[i-1]; | |
3225 | port->cm_dev = cm_dev; | |
3226 | port->port_num = i; | |
3227 | port->mad_agent = ib_register_mad_agent(device, i, | |
3228 | IB_QPT_GSI, | |
3229 | ®_req, | |
3230 | 0, | |
3231 | cm_send_handler, | |
3232 | cm_recv_handler, | |
3233 | port); | |
3234 | if (IS_ERR(port->mad_agent)) | |
3235 | goto error2; | |
3236 | ||
3237 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3238 | if (ret) | |
3239 | goto error3; | |
3240 | } | |
3241 | ib_set_client_data(device, &cm_client, cm_dev); | |
3242 | ||
3243 | write_lock_irqsave(&cm.device_lock, flags); | |
3244 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3245 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3246 | return; | |
3247 | ||
3248 | error3: | |
3249 | ib_unregister_mad_agent(port->mad_agent); | |
3250 | error2: | |
3251 | port_modify.set_port_cap_mask = 0; | |
3252 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3253 | while (--i) { | |
3254 | port = &cm_dev->port[i-1]; | |
3255 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3256 | ib_unregister_mad_agent(port->mad_agent); | |
3257 | } | |
3258 | error1: | |
3259 | kfree(cm_dev); | |
3260 | } | |
3261 | ||
3262 | static void cm_remove_one(struct ib_device *device) | |
3263 | { | |
3264 | struct cm_device *cm_dev; | |
3265 | struct cm_port *port; | |
3266 | struct ib_port_modify port_modify = { | |
3267 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3268 | }; | |
3269 | unsigned long flags; | |
3270 | int i; | |
3271 | ||
3272 | cm_dev = ib_get_client_data(device, &cm_client); | |
3273 | if (!cm_dev) | |
3274 | return; | |
3275 | ||
3276 | write_lock_irqsave(&cm.device_lock, flags); | |
3277 | list_del(&cm_dev->list); | |
3278 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3279 | ||
3280 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3281 | port = &cm_dev->port[i-1]; | |
3282 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3283 | ib_unregister_mad_agent(port->mad_agent); | |
3284 | } | |
3285 | kfree(cm_dev); | |
3286 | } | |
3287 | ||
3288 | static int __init ib_cm_init(void) | |
3289 | { | |
3290 | int ret; | |
3291 | ||
3292 | memset(&cm, 0, sizeof cm); | |
3293 | INIT_LIST_HEAD(&cm.device_list); | |
3294 | rwlock_init(&cm.device_lock); | |
3295 | spin_lock_init(&cm.lock); | |
3296 | cm.listen_service_table = RB_ROOT; | |
3297 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3298 | cm.remote_id_table = RB_ROOT; | |
3299 | cm.remote_qp_table = RB_ROOT; | |
3300 | cm.remote_sidr_table = RB_ROOT; | |
3301 | idr_init(&cm.local_id_table); | |
3302 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); | |
3303 | ||
3304 | cm.wq = create_workqueue("ib_cm"); | |
3305 | if (!cm.wq) | |
3306 | return -ENOMEM; | |
3307 | ||
3308 | ret = ib_register_client(&cm_client); | |
3309 | if (ret) | |
3310 | goto error; | |
3311 | ||
3312 | return 0; | |
3313 | error: | |
3314 | destroy_workqueue(cm.wq); | |
3315 | return ret; | |
3316 | } | |
3317 | ||
3318 | static void __exit ib_cm_cleanup(void) | |
3319 | { | |
3320 | flush_workqueue(cm.wq); | |
3321 | destroy_workqueue(cm.wq); | |
3322 | ib_unregister_client(&cm_client); | |
3323 | } | |
3324 | ||
3325 | module_init(ib_cm_init); | |
3326 | module_exit(ib_cm_cleanup); | |
3327 |