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a977049d | 1 | /* |
f06d2653 | 2 | * Copyright (c) 2004-2006 Intel Corporation. All rights reserved. |
a977049d HR |
3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. | |
5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
6 | * | |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
34 | * | |
6e61d04f | 35 | * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $ |
a977049d | 36 | */ |
1b52fa98 SH |
37 | |
38 | #include <linux/completion.h> | |
a977049d HR |
39 | #include <linux/dma-mapping.h> |
40 | #include <linux/err.h> | |
41 | #include <linux/idr.h> | |
42 | #include <linux/interrupt.h> | |
43 | #include <linux/pci.h> | |
f06d2653 | 44 | #include <linux/random.h> |
a977049d HR |
45 | #include <linux/rbtree.h> |
46 | #include <linux/spinlock.h> | |
47 | #include <linux/workqueue.h> | |
48 | ||
a4d61e84 RD |
49 | #include <rdma/ib_cache.h> |
50 | #include <rdma/ib_cm.h> | |
a977049d HR |
51 | #include "cm_msgs.h" |
52 | ||
53 | MODULE_AUTHOR("Sean Hefty"); | |
54 | MODULE_DESCRIPTION("InfiniBand CM"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
57 | static void cm_add_one(struct ib_device *device); | |
58 | static void cm_remove_one(struct ib_device *device); | |
59 | ||
60 | static struct ib_client cm_client = { | |
61 | .name = "cm", | |
62 | .add = cm_add_one, | |
63 | .remove = cm_remove_one | |
64 | }; | |
65 | ||
66 | static struct ib_cm { | |
67 | spinlock_t lock; | |
68 | struct list_head device_list; | |
69 | rwlock_t device_lock; | |
70 | struct rb_root listen_service_table; | |
71 | u64 listen_service_id; | |
72 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
73 | struct rb_root remote_qp_table; | |
74 | struct rb_root remote_id_table; | |
75 | struct rb_root remote_sidr_table; | |
76 | struct idr local_id_table; | |
f06d2653 | 77 | __be32 random_id_operand; |
8575329d | 78 | struct list_head timewait_list; |
a977049d HR |
79 | struct workqueue_struct *wq; |
80 | } cm; | |
81 | ||
82 | struct cm_port { | |
83 | struct cm_device *cm_dev; | |
84 | struct ib_mad_agent *mad_agent; | |
85 | u8 port_num; | |
86 | }; | |
87 | ||
88 | struct cm_device { | |
89 | struct list_head list; | |
90 | struct ib_device *device; | |
97f52eb4 | 91 | __be64 ca_guid; |
a977049d HR |
92 | struct cm_port port[0]; |
93 | }; | |
94 | ||
95 | struct cm_av { | |
96 | struct cm_port *port; | |
97 | union ib_gid dgid; | |
98 | struct ib_ah_attr ah_attr; | |
99 | u16 pkey_index; | |
100 | u8 packet_life_time; | |
101 | }; | |
102 | ||
103 | struct cm_work { | |
104 | struct work_struct work; | |
105 | struct list_head list; | |
106 | struct cm_port *port; | |
107 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
108 | __be32 local_id; /* Established / timewait */ |
109 | __be32 remote_id; | |
a977049d HR |
110 | struct ib_cm_event cm_event; |
111 | struct ib_sa_path_rec path[0]; | |
112 | }; | |
113 | ||
114 | struct cm_timewait_info { | |
115 | struct cm_work work; /* Must be first. */ | |
8575329d | 116 | struct list_head list; |
a977049d HR |
117 | struct rb_node remote_qp_node; |
118 | struct rb_node remote_id_node; | |
97f52eb4 SH |
119 | __be64 remote_ca_guid; |
120 | __be32 remote_qpn; | |
a977049d HR |
121 | u8 inserted_remote_qp; |
122 | u8 inserted_remote_id; | |
123 | }; | |
124 | ||
125 | struct cm_id_private { | |
126 | struct ib_cm_id id; | |
127 | ||
128 | struct rb_node service_node; | |
129 | struct rb_node sidr_id_node; | |
87fd1a11 | 130 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 131 | struct completion comp; |
a977049d HR |
132 | atomic_t refcount; |
133 | ||
134 | struct ib_mad_send_buf *msg; | |
135 | struct cm_timewait_info *timewait_info; | |
136 | /* todo: use alternate port on send failure */ | |
137 | struct cm_av av; | |
138 | struct cm_av alt_av; | |
6e61d04f | 139 | struct ib_cm_compare_data *compare_data; |
a977049d HR |
140 | |
141 | void *private_data; | |
97f52eb4 SH |
142 | __be64 tid; |
143 | __be32 local_qpn; | |
144 | __be32 remote_qpn; | |
ae7971a7 | 145 | enum ib_qp_type qp_type; |
97f52eb4 SH |
146 | __be32 sq_psn; |
147 | __be32 rq_psn; | |
a977049d HR |
148 | int timeout_ms; |
149 | enum ib_mtu path_mtu; | |
150 | u8 private_data_len; | |
151 | u8 max_cm_retries; | |
152 | u8 peer_to_peer; | |
153 | u8 responder_resources; | |
154 | u8 initiator_depth; | |
155 | u8 local_ack_timeout; | |
156 | u8 retry_count; | |
157 | u8 rnr_retry_count; | |
158 | u8 service_timeout; | |
159 | ||
160 | struct list_head work_list; | |
161 | atomic_t work_count; | |
162 | }; | |
163 | ||
164 | static void cm_work_handler(void *data); | |
165 | ||
166 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
167 | { | |
168 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 169 | complete(&cm_id_priv->comp); |
a977049d HR |
170 | } |
171 | ||
172 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
173 | struct ib_mad_send_buf **msg) | |
174 | { | |
175 | struct ib_mad_agent *mad_agent; | |
176 | struct ib_mad_send_buf *m; | |
177 | struct ib_ah *ah; | |
178 | ||
179 | mad_agent = cm_id_priv->av.port->mad_agent; | |
180 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
181 | if (IS_ERR(ah)) | |
182 | return PTR_ERR(ah); | |
183 | ||
3cd96564 | 184 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
354ba39c | 185 | cm_id_priv->av.pkey_index, |
34816ad9 | 186 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
187 | GFP_ATOMIC); |
188 | if (IS_ERR(m)) { | |
189 | ib_destroy_ah(ah); | |
190 | return PTR_ERR(m); | |
191 | } | |
192 | ||
193 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
194 | m->ah = ah; |
195 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
196 | |
197 | atomic_inc(&cm_id_priv->refcount); | |
198 | m->context[0] = cm_id_priv; | |
199 | *msg = m; | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static int cm_alloc_response_msg(struct cm_port *port, | |
204 | struct ib_mad_recv_wc *mad_recv_wc, | |
205 | struct ib_mad_send_buf **msg) | |
206 | { | |
207 | struct ib_mad_send_buf *m; | |
208 | struct ib_ah *ah; | |
209 | ||
210 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
211 | mad_recv_wc->recv_buf.grh, port->port_num); | |
212 | if (IS_ERR(ah)) | |
213 | return PTR_ERR(ah); | |
214 | ||
215 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 216 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
217 | GFP_ATOMIC); |
218 | if (IS_ERR(m)) { | |
219 | ib_destroy_ah(ah); | |
220 | return PTR_ERR(m); | |
221 | } | |
34816ad9 | 222 | m->ah = ah; |
a977049d HR |
223 | *msg = m; |
224 | return 0; | |
225 | } | |
226 | ||
227 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
228 | { | |
34816ad9 | 229 | ib_destroy_ah(msg->ah); |
a977049d HR |
230 | if (msg->context[0]) |
231 | cm_deref_id(msg->context[0]); | |
232 | ib_free_send_mad(msg); | |
233 | } | |
234 | ||
235 | static void * cm_copy_private_data(const void *private_data, | |
236 | u8 private_data_len) | |
237 | { | |
238 | void *data; | |
239 | ||
240 | if (!private_data || !private_data_len) | |
241 | return NULL; | |
242 | ||
bed8bdfd | 243 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
a977049d HR |
244 | if (!data) |
245 | return ERR_PTR(-ENOMEM); | |
246 | ||
a977049d HR |
247 | return data; |
248 | } | |
249 | ||
250 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
251 | void *private_data, u8 private_data_len) | |
252 | { | |
253 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
254 | kfree(cm_id_priv->private_data); | |
255 | ||
256 | cm_id_priv->private_data = private_data; | |
257 | cm_id_priv->private_data_len = private_data_len; | |
258 | } | |
259 | ||
ca222c6b SH |
260 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
261 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
262 | { |
263 | av->port = port; | |
264 | av->pkey_index = wc->pkey_index; | |
ca222c6b SH |
265 | ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc, |
266 | grh, &av->ah_attr); | |
a977049d HR |
267 | } |
268 | ||
269 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
270 | { | |
271 | struct cm_device *cm_dev; | |
272 | struct cm_port *port = NULL; | |
273 | unsigned long flags; | |
274 | int ret; | |
275 | u8 p; | |
276 | ||
277 | read_lock_irqsave(&cm.device_lock, flags); | |
278 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
279 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, | |
280 | &p, NULL)) { | |
281 | port = &cm_dev->port[p-1]; | |
282 | break; | |
283 | } | |
284 | } | |
285 | read_unlock_irqrestore(&cm.device_lock, flags); | |
286 | ||
287 | if (!port) | |
288 | return -EINVAL; | |
289 | ||
290 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, | |
291 | be16_to_cpu(path->pkey), &av->pkey_index); | |
292 | if (ret) | |
293 | return ret; | |
294 | ||
295 | av->port = port; | |
ca222c6b SH |
296 | ib_init_ah_from_path(cm_dev->device, port->port_num, path, |
297 | &av->ah_attr); | |
a977049d HR |
298 | av->packet_life_time = path->packet_life_time; |
299 | return 0; | |
300 | } | |
301 | ||
302 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
303 | { | |
304 | unsigned long flags; | |
f06d2653 | 305 | int ret, id; |
de1bb1a6 | 306 | static int next_id; |
a977049d HR |
307 | |
308 | do { | |
309 | spin_lock_irqsave(&cm.lock, flags); | |
f06d2653 SH |
310 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
311 | next_id++, &id); | |
a977049d HR |
312 | spin_unlock_irqrestore(&cm.lock, flags); |
313 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
f06d2653 SH |
314 | |
315 | cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand); | |
a977049d HR |
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); | |
f06d2653 SH |
324 | idr_remove(&cm.local_id_table, |
325 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
326 | spin_unlock_irqrestore(&cm.lock, flags); |
327 | } | |
328 | ||
97f52eb4 | 329 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
330 | { |
331 | struct cm_id_private *cm_id_priv; | |
332 | ||
f06d2653 SH |
333 | cm_id_priv = idr_find(&cm.local_id_table, |
334 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
335 | if (cm_id_priv) { |
336 | if (cm_id_priv->id.remote_id == remote_id) | |
337 | atomic_inc(&cm_id_priv->refcount); | |
338 | else | |
339 | cm_id_priv = NULL; | |
340 | } | |
341 | ||
342 | return cm_id_priv; | |
343 | } | |
344 | ||
97f52eb4 | 345 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
346 | { |
347 | struct cm_id_private *cm_id_priv; | |
348 | unsigned long flags; | |
349 | ||
350 | spin_lock_irqsave(&cm.lock, flags); | |
351 | cm_id_priv = cm_get_id(local_id, remote_id); | |
352 | spin_unlock_irqrestore(&cm.lock, flags); | |
353 | ||
354 | return cm_id_priv; | |
355 | } | |
356 | ||
6e61d04f SH |
357 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
358 | { | |
359 | int i; | |
360 | ||
361 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) | |
362 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & | |
363 | ((unsigned long *) mask)[i]; | |
364 | } | |
365 | ||
366 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
367 | struct ib_cm_compare_data *dst_data) | |
368 | { | |
369 | u8 src[IB_CM_COMPARE_SIZE]; | |
370 | u8 dst[IB_CM_COMPARE_SIZE]; | |
371 | ||
372 | if (!src_data || !dst_data) | |
373 | return 0; | |
374 | ||
375 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
376 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
377 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); | |
378 | } | |
379 | ||
380 | static int cm_compare_private_data(u8 *private_data, | |
381 | struct ib_cm_compare_data *dst_data) | |
382 | { | |
383 | u8 src[IB_CM_COMPARE_SIZE]; | |
384 | ||
385 | if (!dst_data) | |
386 | return 0; | |
387 | ||
388 | cm_mask_copy(src, private_data, dst_data->mask); | |
389 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); | |
390 | } | |
391 | ||
a977049d HR |
392 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
393 | { | |
394 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
395 | struct rb_node *parent = NULL; | |
396 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
397 | __be64 service_id = cm_id_priv->id.service_id; |
398 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 399 | int data_cmp; |
a977049d HR |
400 | |
401 | while (*link) { | |
402 | parent = *link; | |
403 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
404 | service_node); | |
6e61d04f SH |
405 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
406 | cur_cm_id_priv->compare_data); | |
a977049d | 407 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 408 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
409 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
410 | !data_cmp) | |
07d357d0 SH |
411 | return cur_cm_id_priv; |
412 | ||
413 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
414 | link = &(*link)->rb_left; | |
415 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
416 | link = &(*link)->rb_right; | |
417 | else if (service_id < cur_cm_id_priv->id.service_id) | |
a977049d | 418 | link = &(*link)->rb_left; |
6e61d04f SH |
419 | else if (service_id > cur_cm_id_priv->id.service_id) |
420 | link = &(*link)->rb_right; | |
421 | else if (data_cmp < 0) | |
422 | link = &(*link)->rb_left; | |
a977049d HR |
423 | else |
424 | link = &(*link)->rb_right; | |
425 | } | |
426 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
427 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
428 | return NULL; | |
429 | } | |
430 | ||
07d357d0 | 431 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f SH |
432 | __be64 service_id, |
433 | u8 *private_data) | |
a977049d HR |
434 | { |
435 | struct rb_node *node = cm.listen_service_table.rb_node; | |
436 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 437 | int data_cmp; |
a977049d HR |
438 | |
439 | while (node) { | |
440 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
441 | data_cmp = cm_compare_private_data(private_data, |
442 | cm_id_priv->compare_data); | |
a977049d | 443 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 444 | cm_id_priv->id.service_id && |
6e61d04f | 445 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 446 | return cm_id_priv; |
07d357d0 SH |
447 | |
448 | if (device < cm_id_priv->id.device) | |
449 | node = node->rb_left; | |
450 | else if (device > cm_id_priv->id.device) | |
451 | node = node->rb_right; | |
452 | else if (service_id < cm_id_priv->id.service_id) | |
a977049d | 453 | node = node->rb_left; |
6e61d04f SH |
454 | else if (service_id > cm_id_priv->id.service_id) |
455 | node = node->rb_right; | |
456 | else if (data_cmp < 0) | |
457 | node = node->rb_left; | |
a977049d HR |
458 | else |
459 | node = node->rb_right; | |
460 | } | |
461 | return NULL; | |
462 | } | |
463 | ||
464 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
465 | *timewait_info) | |
466 | { | |
467 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
468 | struct rb_node *parent = NULL; | |
469 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
470 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
471 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
472 | |
473 | while (*link) { | |
474 | parent = *link; | |
475 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
476 | remote_id_node); | |
477 | if (remote_id < cur_timewait_info->work.remote_id) | |
478 | link = &(*link)->rb_left; | |
479 | else if (remote_id > cur_timewait_info->work.remote_id) | |
480 | link = &(*link)->rb_right; | |
481 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
482 | link = &(*link)->rb_left; | |
483 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
484 | link = &(*link)->rb_right; | |
485 | else | |
486 | return cur_timewait_info; | |
487 | } | |
488 | timewait_info->inserted_remote_id = 1; | |
489 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
490 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
491 | return NULL; | |
492 | } | |
493 | ||
97f52eb4 SH |
494 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
495 | __be32 remote_id) | |
a977049d HR |
496 | { |
497 | struct rb_node *node = cm.remote_id_table.rb_node; | |
498 | struct cm_timewait_info *timewait_info; | |
499 | ||
500 | while (node) { | |
501 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
502 | remote_id_node); | |
503 | if (remote_id < timewait_info->work.remote_id) | |
504 | node = node->rb_left; | |
505 | else if (remote_id > timewait_info->work.remote_id) | |
506 | node = node->rb_right; | |
507 | else if (remote_ca_guid < timewait_info->remote_ca_guid) | |
508 | node = node->rb_left; | |
509 | else if (remote_ca_guid > timewait_info->remote_ca_guid) | |
510 | node = node->rb_right; | |
511 | else | |
512 | return timewait_info; | |
513 | } | |
514 | return NULL; | |
515 | } | |
516 | ||
517 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
518 | *timewait_info) | |
519 | { | |
520 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
521 | struct rb_node *parent = NULL; | |
522 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
523 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
524 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
525 | |
526 | while (*link) { | |
527 | parent = *link; | |
528 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
529 | remote_qp_node); | |
530 | if (remote_qpn < cur_timewait_info->remote_qpn) | |
531 | link = &(*link)->rb_left; | |
532 | else if (remote_qpn > cur_timewait_info->remote_qpn) | |
533 | link = &(*link)->rb_right; | |
534 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
535 | link = &(*link)->rb_left; | |
536 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
537 | link = &(*link)->rb_right; | |
538 | else | |
539 | return cur_timewait_info; | |
540 | } | |
541 | timewait_info->inserted_remote_qp = 1; | |
542 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
543 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
544 | return NULL; | |
545 | } | |
546 | ||
547 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
548 | *cm_id_priv) | |
549 | { | |
550 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
551 | struct rb_node *parent = NULL; | |
552 | struct cm_id_private *cur_cm_id_priv; | |
553 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 554 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
555 | |
556 | while (*link) { | |
557 | parent = *link; | |
558 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
559 | sidr_id_node); | |
560 | if (remote_id < cur_cm_id_priv->id.remote_id) | |
561 | link = &(*link)->rb_left; | |
562 | else if (remote_id > cur_cm_id_priv->id.remote_id) | |
563 | link = &(*link)->rb_right; | |
564 | else { | |
565 | int cmp; | |
566 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
567 | sizeof *port_gid); | |
568 | if (cmp < 0) | |
569 | link = &(*link)->rb_left; | |
570 | else if (cmp > 0) | |
571 | link = &(*link)->rb_right; | |
572 | else | |
573 | return cur_cm_id_priv; | |
574 | } | |
575 | } | |
576 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
577 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
578 | return NULL; | |
579 | } | |
580 | ||
581 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
582 | enum ib_cm_sidr_status status) | |
583 | { | |
584 | struct ib_cm_sidr_rep_param param; | |
585 | ||
586 | memset(¶m, 0, sizeof param); | |
587 | param.status = status; | |
588 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
589 | } | |
590 | ||
07d357d0 SH |
591 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
592 | ib_cm_handler cm_handler, | |
a977049d HR |
593 | void *context) |
594 | { | |
595 | struct cm_id_private *cm_id_priv; | |
596 | int ret; | |
597 | ||
de6eb66b | 598 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
599 | if (!cm_id_priv) |
600 | return ERR_PTR(-ENOMEM); | |
601 | ||
a977049d | 602 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 603 | cm_id_priv->id.device = device; |
a977049d HR |
604 | cm_id_priv->id.cm_handler = cm_handler; |
605 | cm_id_priv->id.context = context; | |
354ba39c | 606 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
607 | ret = cm_alloc_id(cm_id_priv); |
608 | if (ret) | |
609 | goto error; | |
610 | ||
611 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 612 | init_completion(&cm_id_priv->comp); |
a977049d HR |
613 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
614 | atomic_set(&cm_id_priv->work_count, -1); | |
615 | atomic_set(&cm_id_priv->refcount, 1); | |
616 | return &cm_id_priv->id; | |
617 | ||
618 | error: | |
619 | kfree(cm_id_priv); | |
620 | return ERR_PTR(-ENOMEM); | |
621 | } | |
622 | EXPORT_SYMBOL(ib_create_cm_id); | |
623 | ||
624 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
625 | { | |
626 | struct cm_work *work; | |
627 | ||
628 | if (list_empty(&cm_id_priv->work_list)) | |
629 | return NULL; | |
630 | ||
631 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
632 | list_del(&work->list); | |
633 | return work; | |
634 | } | |
635 | ||
636 | static void cm_free_work(struct cm_work *work) | |
637 | { | |
638 | if (work->mad_recv_wc) | |
639 | ib_free_recv_mad(work->mad_recv_wc); | |
640 | kfree(work); | |
641 | } | |
642 | ||
643 | static inline int cm_convert_to_ms(int iba_time) | |
644 | { | |
645 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
646 | return 1 << max(iba_time - 8, 0); | |
647 | } | |
648 | ||
649 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) | |
650 | { | |
a977049d HR |
651 | if (timewait_info->inserted_remote_id) { |
652 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
653 | timewait_info->inserted_remote_id = 0; | |
654 | } | |
655 | ||
656 | if (timewait_info->inserted_remote_qp) { | |
657 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
658 | timewait_info->inserted_remote_qp = 0; | |
659 | } | |
a977049d HR |
660 | } |
661 | ||
97f52eb4 | 662 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
663 | { |
664 | struct cm_timewait_info *timewait_info; | |
665 | ||
de6eb66b | 666 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
667 | if (!timewait_info) |
668 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
669 | |
670 | timewait_info->work.local_id = local_id; | |
671 | INIT_WORK(&timewait_info->work.work, cm_work_handler, | |
672 | &timewait_info->work); | |
673 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; | |
674 | return timewait_info; | |
675 | } | |
676 | ||
677 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
678 | { | |
679 | int wait_time; | |
8575329d | 680 | unsigned long flags; |
a977049d | 681 | |
8575329d | 682 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 683 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
684 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
685 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 686 | |
a977049d HR |
687 | /* |
688 | * The cm_id could be destroyed by the user before we exit timewait. | |
689 | * To protect against this, we search for the cm_id after exiting | |
690 | * timewait before notifying the user that we've exited timewait. | |
691 | */ | |
692 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
693 | wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout); | |
694 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
695 | msecs_to_jiffies(wait_time)); | |
696 | cm_id_priv->timewait_info = NULL; | |
697 | } | |
698 | ||
699 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
700 | { | |
8575329d SH |
701 | unsigned long flags; |
702 | ||
a977049d HR |
703 | cm_id_priv->id.state = IB_CM_IDLE; |
704 | if (cm_id_priv->timewait_info) { | |
8575329d | 705 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 706 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 707 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
708 | kfree(cm_id_priv->timewait_info); |
709 | cm_id_priv->timewait_info = NULL; | |
710 | } | |
711 | } | |
712 | ||
04c33543 | 713 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
714 | { |
715 | struct cm_id_private *cm_id_priv; | |
716 | struct cm_work *work; | |
717 | unsigned long flags; | |
718 | ||
719 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
720 | retest: | |
721 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
722 | switch (cm_id->state) { | |
723 | case IB_CM_LISTEN: | |
724 | cm_id->state = IB_CM_IDLE; | |
725 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
726 | spin_lock_irqsave(&cm.lock, flags); | |
727 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); | |
728 | spin_unlock_irqrestore(&cm.lock, flags); | |
729 | break; | |
730 | case IB_CM_SIDR_REQ_SENT: | |
731 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 732 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
733 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
734 | break; | |
735 | case IB_CM_SIDR_REQ_RCVD: | |
736 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
737 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); | |
738 | break; | |
739 | case IB_CM_REQ_SENT: | |
227eca83 SH |
740 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
741 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
742 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, | |
743 | &cm_id_priv->av.port->cm_dev->ca_guid, | |
744 | sizeof cm_id_priv->av.port->cm_dev->ca_guid, | |
745 | NULL, 0); | |
746 | break; | |
04c33543 MT |
747 | case IB_CM_REQ_RCVD: |
748 | if (err == -ENOMEM) { | |
749 | /* Do not reject to allow future retries. */ | |
750 | cm_reset_to_idle(cm_id_priv); | |
751 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
752 | } else { | |
753 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
754 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, | |
755 | NULL, 0, NULL, 0); | |
756 | } | |
757 | break; | |
a977049d HR |
758 | case IB_CM_MRA_REQ_RCVD: |
759 | case IB_CM_REP_SENT: | |
760 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 761 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 762 | /* Fall through */ |
a977049d HR |
763 | case IB_CM_MRA_REQ_SENT: |
764 | case IB_CM_REP_RCVD: | |
765 | case IB_CM_MRA_REP_SENT: | |
766 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
227eca83 SH |
767 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
768 | NULL, 0, NULL, 0); | |
a977049d HR |
769 | break; |
770 | case IB_CM_ESTABLISHED: | |
771 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
772 | ib_send_cm_dreq(cm_id, NULL, 0); | |
773 | goto retest; | |
774 | case IB_CM_DREQ_SENT: | |
34816ad9 | 775 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
776 | cm_enter_timewait(cm_id_priv); |
777 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
778 | break; | |
779 | case IB_CM_DREQ_RCVD: | |
780 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
781 | ib_send_cm_drep(cm_id, NULL, 0); | |
782 | break; | |
783 | default: | |
784 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
785 | break; | |
786 | } | |
787 | ||
788 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
789 | cm_deref_id(cm_id_priv); |
790 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
791 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
792 | cm_free_work(work); | |
6e61d04f SH |
793 | kfree(cm_id_priv->compare_data); |
794 | kfree(cm_id_priv->private_data); | |
a977049d HR |
795 | kfree(cm_id_priv); |
796 | } | |
04c33543 MT |
797 | |
798 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
799 | { | |
800 | cm_destroy_id(cm_id, 0); | |
801 | } | |
a977049d HR |
802 | EXPORT_SYMBOL(ib_destroy_cm_id); |
803 | ||
6e61d04f SH |
804 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
805 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
806 | { |
807 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
808 | unsigned long flags; | |
809 | int ret = 0; | |
810 | ||
97f52eb4 SH |
811 | service_mask = service_mask ? service_mask : |
812 | __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
813 | service_id &= service_mask; |
814 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
815 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
816 | return -EINVAL; | |
817 | ||
818 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
819 | if (cm_id->state != IB_CM_IDLE) |
820 | return -EINVAL; | |
821 | ||
822 | if (compare_data) { | |
823 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
824 | GFP_KERNEL); | |
825 | if (!cm_id_priv->compare_data) | |
826 | return -ENOMEM; | |
827 | cm_mask_copy(cm_id_priv->compare_data->data, | |
828 | compare_data->data, compare_data->mask); | |
829 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
830 | IB_CM_COMPARE_SIZE); | |
831 | } | |
a977049d HR |
832 | |
833 | cm_id->state = IB_CM_LISTEN; | |
834 | ||
835 | spin_lock_irqsave(&cm.lock, flags); | |
836 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 SH |
837 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
838 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
839 | } else { |
840 | cm_id->service_id = service_id; | |
841 | cm_id->service_mask = service_mask; | |
842 | } | |
843 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
844 | spin_unlock_irqrestore(&cm.lock, flags); | |
845 | ||
846 | if (cur_cm_id_priv) { | |
847 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
848 | kfree(cm_id_priv->compare_data); |
849 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
850 | ret = -EBUSY; |
851 | } | |
852 | return ret; | |
853 | } | |
854 | EXPORT_SYMBOL(ib_cm_listen); | |
855 | ||
97f52eb4 SH |
856 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
857 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
858 | { |
859 | u64 hi_tid, low_tid; | |
860 | ||
861 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
862 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
863 | (msg_seq << 30)); | |
a977049d HR |
864 | return cpu_to_be64(hi_tid | low_tid); |
865 | } | |
866 | ||
867 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 868 | __be16 attr_id, __be64 tid) |
a977049d HR |
869 | { |
870 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
871 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
872 | hdr->class_version = IB_CM_CLASS_VERSION; | |
873 | hdr->method = IB_MGMT_METHOD_SEND; | |
874 | hdr->attr_id = attr_id; | |
875 | hdr->tid = tid; | |
876 | } | |
877 | ||
878 | static void cm_format_req(struct cm_req_msg *req_msg, | |
879 | struct cm_id_private *cm_id_priv, | |
880 | struct ib_cm_req_param *param) | |
881 | { | |
882 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, | |
883 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
884 | ||
885 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
886 | req_msg->service_id = param->service_id; | |
887 | req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
888 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); | |
889 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
890 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
891 | cm_req_set_remote_resp_timeout(req_msg, | |
892 | param->remote_cm_response_timeout); | |
893 | cm_req_set_qp_type(req_msg, param->qp_type); | |
894 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
895 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
896 | cm_req_set_local_resp_timeout(req_msg, | |
897 | param->local_cm_response_timeout); | |
898 | cm_req_set_retry_count(req_msg, param->retry_count); | |
899 | req_msg->pkey = param->primary_path->pkey; | |
900 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
901 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
902 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
903 | cm_req_set_srq(req_msg, param->srq); | |
904 | ||
905 | req_msg->primary_local_lid = param->primary_path->slid; | |
906 | req_msg->primary_remote_lid = param->primary_path->dlid; | |
907 | req_msg->primary_local_gid = param->primary_path->sgid; | |
908 | req_msg->primary_remote_gid = param->primary_path->dgid; | |
909 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); | |
910 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); | |
911 | req_msg->primary_traffic_class = param->primary_path->traffic_class; | |
912 | req_msg->primary_hop_limit = param->primary_path->hop_limit; | |
913 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); | |
914 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ | |
915 | cm_req_set_primary_local_ack_timeout(req_msg, | |
916 | min(31, param->primary_path->packet_life_time + 1)); | |
917 | ||
918 | if (param->alternate_path) { | |
919 | req_msg->alt_local_lid = param->alternate_path->slid; | |
920 | req_msg->alt_remote_lid = param->alternate_path->dlid; | |
921 | req_msg->alt_local_gid = param->alternate_path->sgid; | |
922 | req_msg->alt_remote_gid = param->alternate_path->dgid; | |
923 | cm_req_set_alt_flow_label(req_msg, | |
924 | param->alternate_path->flow_label); | |
925 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); | |
926 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; | |
927 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; | |
928 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); | |
929 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ | |
930 | cm_req_set_alt_local_ack_timeout(req_msg, | |
931 | min(31, param->alternate_path->packet_life_time + 1)); | |
932 | } | |
933 | ||
934 | if (param->private_data && param->private_data_len) | |
935 | memcpy(req_msg->private_data, param->private_data, | |
936 | param->private_data_len); | |
937 | } | |
938 | ||
858119e1 | 939 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
940 | { |
941 | /* peer-to-peer not supported */ | |
942 | if (param->peer_to_peer) | |
943 | return -EINVAL; | |
944 | ||
945 | if (!param->primary_path) | |
946 | return -EINVAL; | |
947 | ||
948 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
949 | return -EINVAL; | |
950 | ||
951 | if (param->private_data && | |
952 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
953 | return -EINVAL; | |
954 | ||
955 | if (param->alternate_path && | |
956 | (param->alternate_path->pkey != param->primary_path->pkey || | |
957 | param->alternate_path->mtu != param->primary_path->mtu)) | |
958 | return -EINVAL; | |
959 | ||
960 | return 0; | |
961 | } | |
962 | ||
963 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
964 | struct ib_cm_req_param *param) | |
965 | { | |
966 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
967 | struct cm_req_msg *req_msg; |
968 | unsigned long flags; | |
969 | int ret; | |
970 | ||
971 | ret = cm_validate_req_param(param); | |
972 | if (ret) | |
973 | return ret; | |
974 | ||
975 | /* Verify that we're not in timewait. */ | |
976 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
977 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
978 | if (cm_id->state != IB_CM_IDLE) { | |
979 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
980 | ret = -EINVAL; | |
981 | goto out; | |
982 | } | |
983 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
984 | ||
985 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
986 | id.local_id); | |
75df23e2 SH |
987 | if (IS_ERR(cm_id_priv->timewait_info)) { |
988 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 989 | goto out; |
75df23e2 | 990 | } |
a977049d HR |
991 | |
992 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
993 | if (ret) | |
994 | goto error1; | |
995 | if (param->alternate_path) { | |
996 | ret = cm_init_av_by_path(param->alternate_path, | |
997 | &cm_id_priv->alt_av); | |
998 | if (ret) | |
999 | goto error1; | |
1000 | } | |
1001 | cm_id->service_id = param->service_id; | |
97f52eb4 | 1002 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1003 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1004 | param->primary_path->packet_life_time) * 2 + | |
1005 | cm_convert_to_ms( | |
1006 | param->remote_cm_response_timeout); | |
1007 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1008 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1009 | cm_id_priv->responder_resources = param->responder_resources; | |
1010 | cm_id_priv->retry_count = param->retry_count; | |
1011 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
ae7971a7 | 1012 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1013 | |
1014 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1015 | if (ret) | |
1016 | goto error1; | |
1017 | ||
1018 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1019 | cm_format_req(req_msg, cm_id_priv, param); | |
1020 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1021 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1022 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1023 | ||
1024 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1025 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
1026 | cm_id_priv->local_ack_timeout = | |
1027 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1028 | ||
1029 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1030 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1031 | if (ret) { |
1032 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1033 | goto error2; | |
1034 | } | |
1035 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1036 | cm_id->state = IB_CM_REQ_SENT; | |
1037 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1038 | return 0; | |
1039 | ||
1040 | error2: cm_free_msg(cm_id_priv->msg); | |
1041 | error1: kfree(cm_id_priv->timewait_info); | |
1042 | out: return ret; | |
1043 | } | |
1044 | EXPORT_SYMBOL(ib_send_cm_req); | |
1045 | ||
1046 | static int cm_issue_rej(struct cm_port *port, | |
1047 | struct ib_mad_recv_wc *mad_recv_wc, | |
1048 | enum ib_cm_rej_reason reason, | |
1049 | enum cm_msg_response msg_rejected, | |
1050 | void *ari, u8 ari_length) | |
1051 | { | |
1052 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1053 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1054 | int ret; | |
1055 | ||
1056 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1057 | if (ret) | |
1058 | return ret; | |
1059 | ||
1060 | /* We just need common CM header information. Cast to any message. */ | |
1061 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1062 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1063 | ||
1064 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1065 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1066 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1067 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1068 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1069 | |
1070 | if (ari && ari_length) { | |
1071 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1072 | memcpy(rej_msg->ari, ari, ari_length); | |
1073 | } | |
1074 | ||
34816ad9 | 1075 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1076 | if (ret) |
1077 | cm_free_msg(msg); | |
1078 | ||
1079 | return ret; | |
1080 | } | |
1081 | ||
97f52eb4 SH |
1082 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1083 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1084 | { |
1085 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1086 | ((local_ca_guid == remote_ca_guid) && | |
1087 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1088 | } | |
1089 | ||
858119e1 | 1090 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1091 | struct ib_sa_path_rec *primary_path, |
1092 | struct ib_sa_path_rec *alt_path) | |
1093 | { | |
1094 | memset(primary_path, 0, sizeof *primary_path); | |
1095 | primary_path->dgid = req_msg->primary_local_gid; | |
1096 | primary_path->sgid = req_msg->primary_remote_gid; | |
1097 | primary_path->dlid = req_msg->primary_local_lid; | |
1098 | primary_path->slid = req_msg->primary_remote_lid; | |
1099 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1100 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1101 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1102 | primary_path->reversible = 1; | |
1103 | primary_path->pkey = req_msg->pkey; | |
1104 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1105 | primary_path->mtu_selector = IB_SA_EQ; | |
1106 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1107 | primary_path->rate_selector = IB_SA_EQ; | |
1108 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1109 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1110 | primary_path->packet_life_time = | |
1111 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1112 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1113 | ||
1114 | if (req_msg->alt_local_lid) { | |
1115 | memset(alt_path, 0, sizeof *alt_path); | |
1116 | alt_path->dgid = req_msg->alt_local_gid; | |
1117 | alt_path->sgid = req_msg->alt_remote_gid; | |
1118 | alt_path->dlid = req_msg->alt_local_lid; | |
1119 | alt_path->slid = req_msg->alt_remote_lid; | |
1120 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1121 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1122 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1123 | alt_path->reversible = 1; | |
1124 | alt_path->pkey = req_msg->pkey; | |
1125 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1126 | alt_path->mtu_selector = IB_SA_EQ; | |
1127 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1128 | alt_path->rate_selector = IB_SA_EQ; | |
1129 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1130 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1131 | alt_path->packet_life_time = | |
1132 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1133 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1134 | } | |
1135 | } | |
1136 | ||
1137 | static void cm_format_req_event(struct cm_work *work, | |
1138 | struct cm_id_private *cm_id_priv, | |
1139 | struct ib_cm_id *listen_id) | |
1140 | { | |
1141 | struct cm_req_msg *req_msg; | |
1142 | struct ib_cm_req_event_param *param; | |
1143 | ||
1144 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1145 | param = &work->cm_event.param.req_rcvd; | |
1146 | param->listen_id = listen_id; | |
a977049d HR |
1147 | param->port = cm_id_priv->av.port->port_num; |
1148 | param->primary_path = &work->path[0]; | |
1149 | if (req_msg->alt_local_lid) | |
1150 | param->alternate_path = &work->path[1]; | |
1151 | else | |
1152 | param->alternate_path = NULL; | |
1153 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1154 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1155 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1156 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1157 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1158 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1159 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1160 | param->local_cm_response_timeout = | |
1161 | cm_req_get_remote_resp_timeout(req_msg); | |
1162 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1163 | param->remote_cm_response_timeout = | |
1164 | cm_req_get_local_resp_timeout(req_msg); | |
1165 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1166 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1167 | param->srq = cm_req_get_srq(req_msg); | |
1168 | work->cm_event.private_data = &req_msg->private_data; | |
1169 | } | |
1170 | ||
1171 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1172 | struct cm_work *work) | |
1173 | { | |
1174 | unsigned long flags; | |
1175 | int ret; | |
1176 | ||
1177 | /* We will typically only have the current event to report. */ | |
1178 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1179 | cm_free_work(work); | |
1180 | ||
1181 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
1182 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1183 | work = cm_dequeue_work(cm_id_priv); | |
1184 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1185 | BUG_ON(!work); | |
1186 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1187 | &work->cm_event); | |
1188 | cm_free_work(work); | |
1189 | } | |
1190 | cm_deref_id(cm_id_priv); | |
1191 | if (ret) | |
04c33543 | 1192 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1193 | } |
1194 | ||
1195 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1196 | struct cm_id_private *cm_id_priv, | |
1197 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1198 | const void *private_data, u8 private_data_len) | |
1199 | { | |
1200 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1201 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1202 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1203 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1204 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1205 | ||
1206 | if (private_data && private_data_len) | |
1207 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1208 | } | |
1209 | ||
1210 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1211 | struct cm_id_private *cm_id_priv, | |
1212 | enum ib_cm_rej_reason reason, | |
1213 | void *ari, | |
1214 | u8 ari_length, | |
1215 | const void *private_data, | |
1216 | u8 private_data_len) | |
1217 | { | |
1218 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1219 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1220 | ||
1221 | switch(cm_id_priv->id.state) { | |
1222 | case IB_CM_REQ_RCVD: | |
1223 | rej_msg->local_comm_id = 0; | |
1224 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1225 | break; | |
1226 | case IB_CM_MRA_REQ_SENT: | |
1227 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1228 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1229 | break; | |
1230 | case IB_CM_REP_RCVD: | |
1231 | case IB_CM_MRA_REP_SENT: | |
1232 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1233 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1234 | break; | |
1235 | default: | |
1236 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1237 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1238 | break; | |
1239 | } | |
1240 | ||
97f52eb4 | 1241 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1242 | if (ari && ari_length) { |
1243 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1244 | memcpy(rej_msg->ari, ari, ari_length); | |
1245 | } | |
1246 | ||
1247 | if (private_data && private_data_len) | |
1248 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1249 | } | |
1250 | ||
1251 | static void cm_dup_req_handler(struct cm_work *work, | |
1252 | struct cm_id_private *cm_id_priv) | |
1253 | { | |
1254 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1255 | unsigned long flags; |
1256 | int ret; | |
1257 | ||
1258 | /* Quick state check to discard duplicate REQs. */ | |
1259 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1260 | return; | |
1261 | ||
1262 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1263 | if (ret) | |
1264 | return; | |
1265 | ||
1266 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1267 | switch (cm_id_priv->id.state) { | |
1268 | case IB_CM_MRA_REQ_SENT: | |
1269 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1270 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1271 | cm_id_priv->private_data, | |
1272 | cm_id_priv->private_data_len); | |
1273 | break; | |
1274 | case IB_CM_TIMEWAIT: | |
1275 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1276 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1277 | break; | |
1278 | default: | |
1279 | goto unlock; | |
1280 | } | |
1281 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1282 | ||
34816ad9 | 1283 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1284 | if (ret) |
1285 | goto free; | |
1286 | return; | |
1287 | ||
1288 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1289 | free: cm_free_msg(msg); | |
1290 | } | |
1291 | ||
1292 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1293 | struct cm_id_private *cm_id_priv) | |
1294 | { | |
1295 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1296 | struct cm_timewait_info *timewait_info; | |
1297 | struct cm_req_msg *req_msg; | |
1298 | unsigned long flags; | |
1299 | ||
1300 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1301 | ||
1302 | /* Check for duplicate REQ and stale connections. */ | |
1303 | spin_lock_irqsave(&cm.lock, flags); | |
1304 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); | |
1305 | if (!timewait_info) | |
1306 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1307 | ||
1308 | if (timewait_info) { | |
1309 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1310 | timewait_info->work.remote_id); | |
8575329d | 1311 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
a977049d HR |
1312 | spin_unlock_irqrestore(&cm.lock, flags); |
1313 | if (cur_cm_id_priv) { | |
1314 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1315 | cm_deref_id(cur_cm_id_priv); | |
1316 | } else | |
1317 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1318 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1319 | NULL, 0); | |
8575329d SH |
1320 | listen_cm_id_priv = NULL; |
1321 | goto out; | |
a977049d HR |
1322 | } |
1323 | ||
1324 | /* Find matching listen request. */ | |
07d357d0 | 1325 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1326 | req_msg->service_id, |
1327 | req_msg->private_data); | |
a977049d | 1328 | if (!listen_cm_id_priv) { |
8575329d | 1329 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
a977049d HR |
1330 | spin_unlock_irqrestore(&cm.lock, flags); |
1331 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1332 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1333 | NULL, 0); | |
8575329d | 1334 | goto out; |
a977049d HR |
1335 | } |
1336 | atomic_inc(&listen_cm_id_priv->refcount); | |
1337 | atomic_inc(&cm_id_priv->refcount); | |
1338 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1339 | atomic_inc(&cm_id_priv->work_count); | |
1340 | spin_unlock_irqrestore(&cm.lock, flags); | |
8575329d | 1341 | out: |
a977049d | 1342 | return listen_cm_id_priv; |
a977049d HR |
1343 | } |
1344 | ||
1345 | static int cm_req_handler(struct cm_work *work) | |
1346 | { | |
1347 | struct ib_cm_id *cm_id; | |
1348 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1349 | struct cm_req_msg *req_msg; | |
1350 | int ret; | |
1351 | ||
1352 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1353 | ||
07d357d0 | 1354 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
1355 | if (IS_ERR(cm_id)) |
1356 | return PTR_ERR(cm_id); | |
1357 | ||
1358 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1359 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1360 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1361 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1362 | &cm_id_priv->av); |
1363 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1364 | id.local_id); | |
1365 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1366 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1367 | goto destroy; |
a977049d HR |
1368 | } |
1369 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1370 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1371 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1372 | ||
1373 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1374 | if (!listen_cm_id_priv) { | |
1375 | ret = -EINVAL; | |
76842405 SH |
1376 | kfree(cm_id_priv->timewait_info); |
1377 | goto destroy; | |
a977049d HR |
1378 | } |
1379 | ||
1380 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1381 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1382 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1383 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1384 | |
1385 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); | |
1386 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
76842405 SH |
1387 | if (ret) { |
1388 | ib_get_cached_gid(work->port->cm_dev->device, | |
1389 | work->port->port_num, 0, &work->path[0].sgid); | |
1390 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1391 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1392 | NULL, 0); | |
1393 | goto rejected; | |
1394 | } | |
a977049d HR |
1395 | if (req_msg->alt_local_lid) { |
1396 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1397 | if (ret) { |
1398 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1399 | &work->path[0].sgid, | |
1400 | sizeof work->path[0].sgid, NULL, 0); | |
1401 | goto rejected; | |
1402 | } | |
a977049d HR |
1403 | } |
1404 | cm_id_priv->tid = req_msg->hdr.tid; | |
1405 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1406 | cm_req_get_local_resp_timeout(req_msg)); | |
1407 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1408 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1409 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1410 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1411 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
1412 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); | |
1413 | cm_id_priv->local_ack_timeout = | |
1414 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1415 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); | |
1416 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1417 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1418 | |
1419 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1420 | cm_process_work(cm_id_priv, work); | |
1421 | cm_deref_id(listen_cm_id_priv); | |
1422 | return 0; | |
1423 | ||
76842405 SH |
1424 | rejected: |
1425 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1426 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1427 | destroy: |
1428 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1429 | return ret; |
1430 | } | |
1431 | ||
1432 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1433 | struct cm_id_private *cm_id_priv, | |
1434 | struct ib_cm_rep_param *param) | |
1435 | { | |
1436 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1437 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1438 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1439 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1440 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1441 | rep_msg->resp_resources = param->responder_resources; | |
1442 | rep_msg->initiator_depth = param->initiator_depth; | |
1443 | cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); | |
1444 | cm_rep_set_failover(rep_msg, param->failover_accepted); | |
1445 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1446 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1447 | cm_rep_set_srq(rep_msg, param->srq); | |
1448 | rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
1449 | ||
1450 | if (param->private_data && param->private_data_len) | |
1451 | memcpy(rep_msg->private_data, param->private_data, | |
1452 | param->private_data_len); | |
1453 | } | |
1454 | ||
1455 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1456 | struct ib_cm_rep_param *param) | |
1457 | { | |
1458 | struct cm_id_private *cm_id_priv; | |
1459 | struct ib_mad_send_buf *msg; | |
1460 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1461 | unsigned long flags; |
1462 | int ret; | |
1463 | ||
1464 | if (param->private_data && | |
1465 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1466 | return -EINVAL; | |
1467 | ||
1468 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1469 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1470 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1471 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1472 | ret = -EINVAL; | |
1473 | goto out; | |
1474 | } | |
1475 | ||
1476 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1477 | if (ret) | |
1478 | goto out; | |
1479 | ||
1480 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1481 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1482 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1483 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1484 | ||
34816ad9 | 1485 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1486 | if (ret) { |
1487 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1488 | cm_free_msg(msg); | |
1489 | return ret; | |
1490 | } | |
1491 | ||
1492 | cm_id->state = IB_CM_REP_SENT; | |
1493 | cm_id_priv->msg = msg; | |
1494 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1495 | cm_id_priv->responder_resources = param->responder_resources; | |
1496 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1497 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1498 | ||
1499 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1500 | return ret; | |
1501 | } | |
1502 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1503 | ||
1504 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1505 | struct cm_id_private *cm_id_priv, | |
1506 | const void *private_data, | |
1507 | u8 private_data_len) | |
1508 | { | |
1509 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1510 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1511 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1512 | ||
1513 | if (private_data && private_data_len) | |
1514 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1515 | } | |
1516 | ||
1517 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1518 | const void *private_data, | |
1519 | u8 private_data_len) | |
1520 | { | |
1521 | struct cm_id_private *cm_id_priv; | |
1522 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1523 | unsigned long flags; |
1524 | void *data; | |
1525 | int ret; | |
1526 | ||
1527 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1528 | return -EINVAL; | |
1529 | ||
1530 | data = cm_copy_private_data(private_data, private_data_len); | |
1531 | if (IS_ERR(data)) | |
1532 | return PTR_ERR(data); | |
1533 | ||
1534 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1535 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1536 | if (cm_id->state != IB_CM_REP_RCVD && | |
1537 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1538 | ret = -EINVAL; | |
1539 | goto error; | |
1540 | } | |
1541 | ||
1542 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1543 | if (ret) | |
1544 | goto error; | |
1545 | ||
1546 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1547 | private_data, private_data_len); | |
1548 | ||
34816ad9 | 1549 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1550 | if (ret) { |
1551 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1552 | cm_free_msg(msg); | |
1553 | kfree(data); | |
1554 | return ret; | |
1555 | } | |
1556 | ||
1557 | cm_id->state = IB_CM_ESTABLISHED; | |
1558 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1559 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1560 | return 0; | |
1561 | ||
1562 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1563 | kfree(data); | |
1564 | return ret; | |
1565 | } | |
1566 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1567 | ||
1568 | static void cm_format_rep_event(struct cm_work *work) | |
1569 | { | |
1570 | struct cm_rep_msg *rep_msg; | |
1571 | struct ib_cm_rep_event_param *param; | |
1572 | ||
1573 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1574 | param = &work->cm_event.param.rep_rcvd; | |
1575 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1576 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1577 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1578 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1579 | param->responder_resources = rep_msg->initiator_depth; | |
1580 | param->initiator_depth = rep_msg->resp_resources; | |
1581 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1582 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1583 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1584 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1585 | param->srq = cm_rep_get_srq(rep_msg); | |
1586 | work->cm_event.private_data = &rep_msg->private_data; | |
1587 | } | |
1588 | ||
1589 | static void cm_dup_rep_handler(struct cm_work *work) | |
1590 | { | |
1591 | struct cm_id_private *cm_id_priv; | |
1592 | struct cm_rep_msg *rep_msg; | |
1593 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1594 | unsigned long flags; |
1595 | int ret; | |
1596 | ||
1597 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1598 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1599 | rep_msg->local_comm_id); | |
1600 | if (!cm_id_priv) | |
1601 | return; | |
1602 | ||
1603 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1604 | if (ret) | |
1605 | goto deref; | |
1606 | ||
1607 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1608 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) | |
1609 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1610 | cm_id_priv->private_data, | |
1611 | cm_id_priv->private_data_len); | |
1612 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1613 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1614 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1615 | cm_id_priv->private_data, | |
1616 | cm_id_priv->private_data_len); | |
1617 | else | |
1618 | goto unlock; | |
1619 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1620 | ||
34816ad9 | 1621 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1622 | if (ret) |
1623 | goto free; | |
1624 | goto deref; | |
1625 | ||
1626 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1627 | free: cm_free_msg(msg); | |
1628 | deref: cm_deref_id(cm_id_priv); | |
1629 | } | |
1630 | ||
1631 | static int cm_rep_handler(struct cm_work *work) | |
1632 | { | |
1633 | struct cm_id_private *cm_id_priv; | |
1634 | struct cm_rep_msg *rep_msg; | |
1635 | unsigned long flags; | |
1636 | int ret; | |
1637 | ||
1638 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1639 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1640 | if (!cm_id_priv) { | |
1641 | cm_dup_rep_handler(work); | |
1642 | return -EINVAL; | |
1643 | } | |
1644 | ||
87fd1a11 SH |
1645 | cm_format_rep_event(work); |
1646 | ||
1647 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1648 | switch (cm_id_priv->id.state) { | |
1649 | case IB_CM_REQ_SENT: | |
1650 | case IB_CM_MRA_REQ_RCVD: | |
1651 | break; | |
1652 | default: | |
1653 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1654 | ret = -EINVAL; | |
1655 | goto error; | |
1656 | } | |
1657 | ||
a977049d HR |
1658 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1659 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1660 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1661 | ||
87fd1a11 | 1662 | spin_lock(&cm.lock); |
a977049d HR |
1663 | /* Check for duplicate REP. */ |
1664 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1665 | spin_unlock(&cm.lock); |
1666 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1667 | ret = -EINVAL; |
1668 | goto error; | |
1669 | } | |
1670 | /* Check for a stale connection. */ | |
1671 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1672 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1673 | &cm.remote_id_table); | |
1674 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1675 | spin_unlock(&cm.lock); | |
1676 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1677 | cm_issue_rej(work->port, work->mad_recv_wc, |
1678 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1679 | NULL, 0); | |
1680 | ret = -EINVAL; | |
1681 | goto error; | |
1682 | } | |
87fd1a11 | 1683 | spin_unlock(&cm.lock); |
a977049d | 1684 | |
a977049d HR |
1685 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1686 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1687 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1688 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1689 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1690 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1691 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1692 | ||
1693 | /* todo: handle peer_to_peer */ | |
1694 | ||
34816ad9 | 1695 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1696 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1697 | if (!ret) | |
1698 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1699 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1700 | ||
1701 | if (ret) | |
1702 | cm_process_work(cm_id_priv, work); | |
1703 | else | |
1704 | cm_deref_id(cm_id_priv); | |
1705 | return 0; | |
1706 | ||
87fd1a11 | 1707 | error: |
a977049d HR |
1708 | cm_deref_id(cm_id_priv); |
1709 | return ret; | |
1710 | } | |
1711 | ||
1712 | static int cm_establish_handler(struct cm_work *work) | |
1713 | { | |
1714 | struct cm_id_private *cm_id_priv; | |
1715 | unsigned long flags; | |
1716 | int ret; | |
1717 | ||
1718 | /* See comment in ib_cm_establish about lookup. */ | |
1719 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); | |
1720 | if (!cm_id_priv) | |
1721 | return -EINVAL; | |
1722 | ||
1723 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1724 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { | |
1725 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1726 | goto out; | |
1727 | } | |
1728 | ||
34816ad9 | 1729 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1730 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1731 | if (!ret) | |
1732 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1733 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1734 | ||
1735 | if (ret) | |
1736 | cm_process_work(cm_id_priv, work); | |
1737 | else | |
1738 | cm_deref_id(cm_id_priv); | |
1739 | return 0; | |
1740 | out: | |
1741 | cm_deref_id(cm_id_priv); | |
1742 | return -EINVAL; | |
1743 | } | |
1744 | ||
1745 | static int cm_rtu_handler(struct cm_work *work) | |
1746 | { | |
1747 | struct cm_id_private *cm_id_priv; | |
1748 | struct cm_rtu_msg *rtu_msg; | |
1749 | unsigned long flags; | |
1750 | int ret; | |
1751 | ||
1752 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1753 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1754 | rtu_msg->local_comm_id); | |
1755 | if (!cm_id_priv) | |
1756 | return -EINVAL; | |
1757 | ||
1758 | work->cm_event.private_data = &rtu_msg->private_data; | |
1759 | ||
1760 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1761 | if (cm_id_priv->id.state != IB_CM_REP_SENT && | |
1762 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
1763 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1764 | goto out; | |
1765 | } | |
1766 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1767 | ||
34816ad9 | 1768 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1769 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1770 | if (!ret) | |
1771 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1772 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1773 | ||
1774 | if (ret) | |
1775 | cm_process_work(cm_id_priv, work); | |
1776 | else | |
1777 | cm_deref_id(cm_id_priv); | |
1778 | return 0; | |
1779 | out: | |
1780 | cm_deref_id(cm_id_priv); | |
1781 | return -EINVAL; | |
1782 | } | |
1783 | ||
1784 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1785 | struct cm_id_private *cm_id_priv, | |
1786 | const void *private_data, | |
1787 | u8 private_data_len) | |
1788 | { | |
1789 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1790 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1791 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1792 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1793 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1794 | ||
1795 | if (private_data && private_data_len) | |
1796 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1797 | } | |
1798 | ||
1799 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1800 | const void *private_data, | |
1801 | u8 private_data_len) | |
1802 | { | |
1803 | struct cm_id_private *cm_id_priv; | |
1804 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1805 | unsigned long flags; |
1806 | int ret; | |
1807 | ||
1808 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1809 | return -EINVAL; | |
1810 | ||
1811 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1812 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1813 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1814 | ret = -EINVAL; | |
1815 | goto out; | |
1816 | } | |
1817 | ||
1818 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1819 | if (ret) { | |
1820 | cm_enter_timewait(cm_id_priv); | |
1821 | goto out; | |
1822 | } | |
1823 | ||
1824 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1825 | private_data, private_data_len); | |
34816ad9 | 1826 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1827 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
1828 | ||
34816ad9 | 1829 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1830 | if (ret) { |
1831 | cm_enter_timewait(cm_id_priv); | |
1832 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1833 | cm_free_msg(msg); | |
1834 | return ret; | |
1835 | } | |
1836 | ||
1837 | cm_id->state = IB_CM_DREQ_SENT; | |
1838 | cm_id_priv->msg = msg; | |
1839 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1840 | return ret; | |
1841 | } | |
1842 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1843 | ||
1844 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1845 | struct cm_id_private *cm_id_priv, | |
1846 | const void *private_data, | |
1847 | u8 private_data_len) | |
1848 | { | |
1849 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1850 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1851 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1852 | ||
1853 | if (private_data && private_data_len) | |
1854 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
1855 | } | |
1856 | ||
1857 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
1858 | const void *private_data, | |
1859 | u8 private_data_len) | |
1860 | { | |
1861 | struct cm_id_private *cm_id_priv; | |
1862 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1863 | unsigned long flags; |
1864 | void *data; | |
1865 | int ret; | |
1866 | ||
1867 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
1868 | return -EINVAL; | |
1869 | ||
1870 | data = cm_copy_private_data(private_data, private_data_len); | |
1871 | if (IS_ERR(data)) | |
1872 | return PTR_ERR(data); | |
1873 | ||
1874 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1875 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1876 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
1877 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1878 | kfree(data); | |
1879 | return -EINVAL; | |
1880 | } | |
1881 | ||
1882 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1883 | cm_enter_timewait(cm_id_priv); | |
1884 | ||
1885 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1886 | if (ret) | |
1887 | goto out; | |
1888 | ||
1889 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1890 | private_data, private_data_len); | |
1891 | ||
34816ad9 | 1892 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1893 | if (ret) { |
1894 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1895 | cm_free_msg(msg); | |
1896 | return ret; | |
1897 | } | |
1898 | ||
1899 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1900 | return ret; | |
1901 | } | |
1902 | EXPORT_SYMBOL(ib_send_cm_drep); | |
1903 | ||
82a9c16a SH |
1904 | static int cm_issue_drep(struct cm_port *port, |
1905 | struct ib_mad_recv_wc *mad_recv_wc) | |
1906 | { | |
1907 | struct ib_mad_send_buf *msg = NULL; | |
1908 | struct cm_dreq_msg *dreq_msg; | |
1909 | struct cm_drep_msg *drep_msg; | |
1910 | int ret; | |
1911 | ||
1912 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1913 | if (ret) | |
1914 | return ret; | |
1915 | ||
1916 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
1917 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
1918 | ||
1919 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
1920 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
1921 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
1922 | ||
1923 | ret = ib_post_send_mad(msg, NULL); | |
1924 | if (ret) | |
1925 | cm_free_msg(msg); | |
1926 | ||
1927 | return ret; | |
1928 | } | |
1929 | ||
a977049d HR |
1930 | static int cm_dreq_handler(struct cm_work *work) |
1931 | { | |
1932 | struct cm_id_private *cm_id_priv; | |
1933 | struct cm_dreq_msg *dreq_msg; | |
1934 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1935 | unsigned long flags; |
1936 | int ret; | |
1937 | ||
1938 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
1939 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
1940 | dreq_msg->local_comm_id); | |
82a9c16a SH |
1941 | if (!cm_id_priv) { |
1942 | cm_issue_drep(work->port, work->mad_recv_wc); | |
a977049d | 1943 | return -EINVAL; |
82a9c16a | 1944 | } |
a977049d HR |
1945 | |
1946 | work->cm_event.private_data = &dreq_msg->private_data; | |
1947 | ||
1948 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1949 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) | |
1950 | goto unlock; | |
1951 | ||
1952 | switch (cm_id_priv->id.state) { | |
1953 | case IB_CM_REP_SENT: | |
1954 | case IB_CM_DREQ_SENT: | |
34816ad9 | 1955 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1956 | break; |
1957 | case IB_CM_ESTABLISHED: | |
1958 | case IB_CM_MRA_REP_RCVD: | |
1959 | break; | |
1960 | case IB_CM_TIMEWAIT: | |
1961 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
1962 | goto unlock; | |
1963 | ||
1964 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1965 | cm_id_priv->private_data, | |
1966 | cm_id_priv->private_data_len); | |
1967 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1968 | ||
34816ad9 | 1969 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
1970 | cm_free_msg(msg); |
1971 | goto deref; | |
1972 | default: | |
1973 | goto unlock; | |
1974 | } | |
1975 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
1976 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
1977 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1978 | if (!ret) | |
1979 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1980 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1981 | ||
1982 | if (ret) | |
1983 | cm_process_work(cm_id_priv, work); | |
1984 | else | |
1985 | cm_deref_id(cm_id_priv); | |
1986 | return 0; | |
1987 | ||
1988 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1989 | deref: cm_deref_id(cm_id_priv); | |
1990 | return -EINVAL; | |
1991 | } | |
1992 | ||
1993 | static int cm_drep_handler(struct cm_work *work) | |
1994 | { | |
1995 | struct cm_id_private *cm_id_priv; | |
1996 | struct cm_drep_msg *drep_msg; | |
1997 | unsigned long flags; | |
1998 | int ret; | |
1999 | ||
2000 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2001 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2002 | drep_msg->local_comm_id); | |
2003 | if (!cm_id_priv) | |
2004 | return -EINVAL; | |
2005 | ||
2006 | work->cm_event.private_data = &drep_msg->private_data; | |
2007 | ||
2008 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2009 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && | |
2010 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
2011 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2012 | goto out; | |
2013 | } | |
2014 | cm_enter_timewait(cm_id_priv); | |
2015 | ||
34816ad9 | 2016 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2017 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2018 | if (!ret) | |
2019 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2020 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2021 | ||
2022 | if (ret) | |
2023 | cm_process_work(cm_id_priv, work); | |
2024 | else | |
2025 | cm_deref_id(cm_id_priv); | |
2026 | return 0; | |
2027 | out: | |
2028 | cm_deref_id(cm_id_priv); | |
2029 | return -EINVAL; | |
2030 | } | |
2031 | ||
2032 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2033 | enum ib_cm_rej_reason reason, | |
2034 | void *ari, | |
2035 | u8 ari_length, | |
2036 | const void *private_data, | |
2037 | u8 private_data_len) | |
2038 | { | |
2039 | struct cm_id_private *cm_id_priv; | |
2040 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2041 | unsigned long flags; |
2042 | int ret; | |
2043 | ||
2044 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2045 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2046 | return -EINVAL; | |
2047 | ||
2048 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2049 | ||
2050 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2051 | switch (cm_id->state) { | |
2052 | case IB_CM_REQ_SENT: | |
2053 | case IB_CM_MRA_REQ_RCVD: | |
2054 | case IB_CM_REQ_RCVD: | |
2055 | case IB_CM_MRA_REQ_SENT: | |
2056 | case IB_CM_REP_RCVD: | |
2057 | case IB_CM_MRA_REP_SENT: | |
2058 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2059 | if (!ret) | |
2060 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2061 | cm_id_priv, reason, ari, ari_length, | |
2062 | private_data, private_data_len); | |
2063 | ||
2064 | cm_reset_to_idle(cm_id_priv); | |
2065 | break; | |
2066 | case IB_CM_REP_SENT: | |
2067 | case IB_CM_MRA_REP_RCVD: | |
2068 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2069 | if (!ret) | |
2070 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2071 | cm_id_priv, reason, ari, ari_length, | |
2072 | private_data, private_data_len); | |
2073 | ||
2074 | cm_enter_timewait(cm_id_priv); | |
2075 | break; | |
2076 | default: | |
2077 | ret = -EINVAL; | |
2078 | goto out; | |
2079 | } | |
2080 | ||
2081 | if (ret) | |
2082 | goto out; | |
2083 | ||
34816ad9 | 2084 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2085 | if (ret) |
2086 | cm_free_msg(msg); | |
2087 | ||
2088 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2089 | return ret; | |
2090 | } | |
2091 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2092 | ||
2093 | static void cm_format_rej_event(struct cm_work *work) | |
2094 | { | |
2095 | struct cm_rej_msg *rej_msg; | |
2096 | struct ib_cm_rej_event_param *param; | |
2097 | ||
2098 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2099 | param = &work->cm_event.param.rej_rcvd; | |
2100 | param->ari = rej_msg->ari; | |
2101 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2102 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2103 | work->cm_event.private_data = &rej_msg->private_data; |
2104 | } | |
2105 | ||
2106 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2107 | { | |
2108 | struct cm_timewait_info *timewait_info; | |
2109 | struct cm_id_private *cm_id_priv; | |
2110 | unsigned long flags; | |
97f52eb4 | 2111 | __be32 remote_id; |
a977049d HR |
2112 | |
2113 | remote_id = rej_msg->local_comm_id; | |
2114 | ||
97f52eb4 | 2115 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
a977049d | 2116 | spin_lock_irqsave(&cm.lock, flags); |
97f52eb4 | 2117 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2118 | remote_id); |
2119 | if (!timewait_info) { | |
2120 | spin_unlock_irqrestore(&cm.lock, flags); | |
2121 | return NULL; | |
2122 | } | |
f06d2653 SH |
2123 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2124 | (timewait_info->work.local_id ^ | |
2125 | cm.random_id_operand)); | |
a977049d HR |
2126 | if (cm_id_priv) { |
2127 | if (cm_id_priv->id.remote_id == remote_id) | |
2128 | atomic_inc(&cm_id_priv->refcount); | |
2129 | else | |
2130 | cm_id_priv = NULL; | |
2131 | } | |
2132 | spin_unlock_irqrestore(&cm.lock, flags); | |
2133 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) | |
2134 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2135 | else | |
2136 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2137 | ||
2138 | return cm_id_priv; | |
2139 | } | |
2140 | ||
2141 | static int cm_rej_handler(struct cm_work *work) | |
2142 | { | |
2143 | struct cm_id_private *cm_id_priv; | |
2144 | struct cm_rej_msg *rej_msg; | |
2145 | unsigned long flags; | |
2146 | int ret; | |
2147 | ||
2148 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2149 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2150 | if (!cm_id_priv) | |
2151 | return -EINVAL; | |
2152 | ||
2153 | cm_format_rej_event(work); | |
2154 | ||
2155 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2156 | switch (cm_id_priv->id.state) { | |
2157 | case IB_CM_REQ_SENT: | |
2158 | case IB_CM_MRA_REQ_RCVD: | |
2159 | case IB_CM_REP_SENT: | |
2160 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2161 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2162 | /* fall through */ |
2163 | case IB_CM_REQ_RCVD: | |
2164 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2165 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2166 | cm_enter_timewait(cm_id_priv); |
2167 | else | |
2168 | cm_reset_to_idle(cm_id_priv); | |
2169 | break; | |
2170 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2171 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2172 | /* fall through */ |
2173 | case IB_CM_REP_RCVD: | |
2174 | case IB_CM_MRA_REP_SENT: | |
2175 | case IB_CM_ESTABLISHED: | |
2176 | cm_enter_timewait(cm_id_priv); | |
2177 | break; | |
2178 | default: | |
2179 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2180 | ret = -EINVAL; | |
2181 | goto out; | |
2182 | } | |
2183 | ||
2184 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2185 | if (!ret) | |
2186 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2187 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2188 | ||
2189 | if (ret) | |
2190 | cm_process_work(cm_id_priv, work); | |
2191 | else | |
2192 | cm_deref_id(cm_id_priv); | |
2193 | return 0; | |
2194 | out: | |
2195 | cm_deref_id(cm_id_priv); | |
2196 | return -EINVAL; | |
2197 | } | |
2198 | ||
2199 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2200 | u8 service_timeout, | |
2201 | const void *private_data, | |
2202 | u8 private_data_len) | |
2203 | { | |
2204 | struct cm_id_private *cm_id_priv; | |
2205 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2206 | void *data; |
2207 | unsigned long flags; | |
2208 | int ret; | |
2209 | ||
2210 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2211 | return -EINVAL; | |
2212 | ||
2213 | data = cm_copy_private_data(private_data, private_data_len); | |
2214 | if (IS_ERR(data)) | |
2215 | return PTR_ERR(data); | |
2216 | ||
2217 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2218 | ||
2219 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2220 | switch(cm_id_priv->id.state) { | |
2221 | case IB_CM_REQ_RCVD: | |
2222 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2223 | if (ret) | |
2224 | goto error1; | |
2225 | ||
2226 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2227 | CM_MSG_RESPONSE_REQ, service_timeout, | |
2228 | private_data, private_data_len); | |
34816ad9 | 2229 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2230 | if (ret) |
2231 | goto error2; | |
2232 | cm_id->state = IB_CM_MRA_REQ_SENT; | |
2233 | break; | |
2234 | case IB_CM_REP_RCVD: | |
2235 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2236 | if (ret) | |
2237 | goto error1; | |
2238 | ||
2239 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2240 | CM_MSG_RESPONSE_REP, service_timeout, | |
2241 | private_data, private_data_len); | |
34816ad9 | 2242 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2243 | if (ret) |
2244 | goto error2; | |
2245 | cm_id->state = IB_CM_MRA_REP_SENT; | |
2246 | break; | |
2247 | case IB_CM_ESTABLISHED: | |
2248 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2249 | if (ret) | |
2250 | goto error1; | |
2251 | ||
2252 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2253 | CM_MSG_RESPONSE_OTHER, service_timeout, | |
2254 | private_data, private_data_len); | |
34816ad9 | 2255 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2256 | if (ret) |
2257 | goto error2; | |
2258 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; | |
2259 | break; | |
2260 | default: | |
2261 | ret = -EINVAL; | |
2262 | goto error1; | |
2263 | } | |
2264 | cm_id_priv->service_timeout = service_timeout; | |
2265 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2266 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2267 | return 0; | |
2268 | ||
2269 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2270 | kfree(data); | |
2271 | return ret; | |
2272 | ||
2273 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2274 | kfree(data); | |
2275 | cm_free_msg(msg); | |
2276 | return ret; | |
2277 | } | |
2278 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2279 | ||
2280 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2281 | { | |
2282 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2283 | case CM_MSG_RESPONSE_REQ: | |
2284 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2285 | case CM_MSG_RESPONSE_REP: | |
2286 | case CM_MSG_RESPONSE_OTHER: | |
2287 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2288 | mra_msg->local_comm_id); | |
2289 | default: | |
2290 | return NULL; | |
2291 | } | |
2292 | } | |
2293 | ||
2294 | static int cm_mra_handler(struct cm_work *work) | |
2295 | { | |
2296 | struct cm_id_private *cm_id_priv; | |
2297 | struct cm_mra_msg *mra_msg; | |
2298 | unsigned long flags; | |
2299 | int timeout, ret; | |
2300 | ||
2301 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2302 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2303 | if (!cm_id_priv) | |
2304 | return -EINVAL; | |
2305 | ||
2306 | work->cm_event.private_data = &mra_msg->private_data; | |
2307 | work->cm_event.param.mra_rcvd.service_timeout = | |
2308 | cm_mra_get_service_timeout(mra_msg); | |
2309 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
2310 | cm_convert_to_ms(cm_id_priv->av.packet_life_time); | |
2311 | ||
2312 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2313 | switch (cm_id_priv->id.state) { | |
2314 | case IB_CM_REQ_SENT: | |
2315 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2316 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2317 | cm_id_priv->msg, timeout)) |
a977049d HR |
2318 | goto out; |
2319 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2320 | break; | |
2321 | case IB_CM_REP_SENT: | |
2322 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2323 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2324 | cm_id_priv->msg, timeout)) |
a977049d HR |
2325 | goto out; |
2326 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2327 | break; | |
2328 | case IB_CM_ESTABLISHED: | |
2329 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2330 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2331 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2332 | cm_id_priv->msg, timeout)) |
a977049d HR |
2333 | goto out; |
2334 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; | |
2335 | break; | |
2336 | default: | |
2337 | goto out; | |
2338 | } | |
2339 | ||
2340 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2341 | cm_id_priv->id.state; | |
2342 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2343 | if (!ret) | |
2344 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2345 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2346 | ||
2347 | if (ret) | |
2348 | cm_process_work(cm_id_priv, work); | |
2349 | else | |
2350 | cm_deref_id(cm_id_priv); | |
2351 | return 0; | |
2352 | out: | |
2353 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2354 | cm_deref_id(cm_id_priv); | |
2355 | return -EINVAL; | |
2356 | } | |
2357 | ||
2358 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2359 | struct cm_id_private *cm_id_priv, | |
2360 | struct ib_sa_path_rec *alternate_path, | |
2361 | const void *private_data, | |
2362 | u8 private_data_len) | |
2363 | { | |
2364 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2365 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2366 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2367 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2368 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2369 | /* todo: need remote CM response timeout */ | |
2370 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2371 | lap_msg->alt_local_lid = alternate_path->slid; | |
2372 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2373 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2374 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2375 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2376 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2377 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2378 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2379 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2380 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2381 | cm_lap_set_local_ack_timeout(lap_msg, | |
2382 | min(31, alternate_path->packet_life_time + 1)); | |
2383 | ||
2384 | if (private_data && private_data_len) | |
2385 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2386 | } | |
2387 | ||
2388 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2389 | struct ib_sa_path_rec *alternate_path, | |
2390 | const void *private_data, | |
2391 | u8 private_data_len) | |
2392 | { | |
2393 | struct cm_id_private *cm_id_priv; | |
2394 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2395 | unsigned long flags; |
2396 | int ret; | |
2397 | ||
2398 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2399 | return -EINVAL; | |
2400 | ||
2401 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2402 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2403 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2404 | cm_id->lap_state != IB_CM_LAP_IDLE) { | |
2405 | ret = -EINVAL; | |
2406 | goto out; | |
2407 | } | |
2408 | ||
2409 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2410 | if (ret) | |
2411 | goto out; | |
2412 | ||
2413 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2414 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2415 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2416 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2417 | ||
34816ad9 | 2418 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2419 | if (ret) { |
2420 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2421 | cm_free_msg(msg); | |
2422 | return ret; | |
2423 | } | |
2424 | ||
2425 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2426 | cm_id_priv->msg = msg; | |
2427 | ||
2428 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2429 | return ret; | |
2430 | } | |
2431 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2432 | ||
2433 | static void cm_format_path_from_lap(struct ib_sa_path_rec *path, | |
2434 | struct cm_lap_msg *lap_msg) | |
2435 | { | |
2436 | memset(path, 0, sizeof *path); | |
2437 | path->dgid = lap_msg->alt_local_gid; | |
2438 | path->sgid = lap_msg->alt_remote_gid; | |
2439 | path->dlid = lap_msg->alt_local_lid; | |
2440 | path->slid = lap_msg->alt_remote_lid; | |
2441 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2442 | path->hop_limit = lap_msg->alt_hop_limit; | |
2443 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2444 | path->reversible = 1; | |
2445 | /* pkey is same as in REQ */ | |
2446 | path->sl = cm_lap_get_sl(lap_msg); | |
2447 | path->mtu_selector = IB_SA_EQ; | |
2448 | /* mtu is same as in REQ */ | |
2449 | path->rate_selector = IB_SA_EQ; | |
2450 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2451 | path->packet_life_time_selector = IB_SA_EQ; | |
2452 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2453 | path->packet_life_time -= (path->packet_life_time > 0); | |
2454 | } | |
2455 | ||
2456 | static int cm_lap_handler(struct cm_work *work) | |
2457 | { | |
2458 | struct cm_id_private *cm_id_priv; | |
2459 | struct cm_lap_msg *lap_msg; | |
2460 | struct ib_cm_lap_event_param *param; | |
2461 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2462 | unsigned long flags; |
2463 | int ret; | |
2464 | ||
2465 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2466 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2467 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2468 | lap_msg->local_comm_id); | |
2469 | if (!cm_id_priv) | |
2470 | return -EINVAL; | |
2471 | ||
2472 | param = &work->cm_event.param.lap_rcvd; | |
2473 | param->alternate_path = &work->path[0]; | |
2474 | cm_format_path_from_lap(param->alternate_path, lap_msg); | |
2475 | work->cm_event.private_data = &lap_msg->private_data; | |
2476 | ||
2477 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2478 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) | |
2479 | goto unlock; | |
2480 | ||
2481 | switch (cm_id_priv->id.lap_state) { | |
2482 | case IB_CM_LAP_IDLE: | |
2483 | break; | |
2484 | case IB_CM_MRA_LAP_SENT: | |
2485 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
2486 | goto unlock; | |
2487 | ||
2488 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2489 | CM_MSG_RESPONSE_OTHER, | |
2490 | cm_id_priv->service_timeout, | |
2491 | cm_id_priv->private_data, | |
2492 | cm_id_priv->private_data_len); | |
2493 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2494 | ||
34816ad9 | 2495 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2496 | cm_free_msg(msg); |
2497 | goto deref; | |
2498 | default: | |
2499 | goto unlock; | |
2500 | } | |
2501 | ||
2502 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2503 | cm_id_priv->tid = lap_msg->hdr.tid; | |
2504 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2505 | if (!ret) | |
2506 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2507 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2508 | ||
2509 | if (ret) | |
2510 | cm_process_work(cm_id_priv, work); | |
2511 | else | |
2512 | cm_deref_id(cm_id_priv); | |
2513 | return 0; | |
2514 | ||
2515 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2516 | deref: cm_deref_id(cm_id_priv); | |
2517 | return -EINVAL; | |
2518 | } | |
2519 | ||
2520 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2521 | struct cm_id_private *cm_id_priv, | |
2522 | enum ib_cm_apr_status status, | |
2523 | void *info, | |
2524 | u8 info_length, | |
2525 | const void *private_data, | |
2526 | u8 private_data_len) | |
2527 | { | |
2528 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2529 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2530 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2531 | apr_msg->ap_status = (u8) status; | |
2532 | ||
2533 | if (info && info_length) { | |
2534 | apr_msg->info_length = info_length; | |
2535 | memcpy(apr_msg->info, info, info_length); | |
2536 | } | |
2537 | ||
2538 | if (private_data && private_data_len) | |
2539 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2540 | } | |
2541 | ||
2542 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2543 | enum ib_cm_apr_status status, | |
2544 | void *info, | |
2545 | u8 info_length, | |
2546 | const void *private_data, | |
2547 | u8 private_data_len) | |
2548 | { | |
2549 | struct cm_id_private *cm_id_priv; | |
2550 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2551 | unsigned long flags; |
2552 | int ret; | |
2553 | ||
2554 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2555 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2556 | return -EINVAL; | |
2557 | ||
2558 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2559 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2560 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2561 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2562 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2563 | ret = -EINVAL; | |
2564 | goto out; | |
2565 | } | |
2566 | ||
2567 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2568 | if (ret) | |
2569 | goto out; | |
2570 | ||
2571 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2572 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2573 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2574 | if (ret) { |
2575 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2576 | cm_free_msg(msg); | |
2577 | return ret; | |
2578 | } | |
2579 | ||
2580 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2581 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2582 | return ret; | |
2583 | } | |
2584 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2585 | ||
2586 | static int cm_apr_handler(struct cm_work *work) | |
2587 | { | |
2588 | struct cm_id_private *cm_id_priv; | |
2589 | struct cm_apr_msg *apr_msg; | |
2590 | unsigned long flags; | |
2591 | int ret; | |
2592 | ||
2593 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2594 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2595 | apr_msg->local_comm_id); | |
2596 | if (!cm_id_priv) | |
2597 | return -EINVAL; /* Unmatched reply. */ | |
2598 | ||
2599 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2600 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2601 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2602 | work->cm_event.private_data = &apr_msg->private_data; | |
2603 | ||
2604 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2605 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || | |
2606 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2607 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
2608 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2609 | goto out; | |
2610 | } | |
2611 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2612 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2613 | cm_id_priv->msg = NULL; |
2614 | ||
2615 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2616 | if (!ret) | |
2617 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2618 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2619 | ||
2620 | if (ret) | |
2621 | cm_process_work(cm_id_priv, work); | |
2622 | else | |
2623 | cm_deref_id(cm_id_priv); | |
2624 | return 0; | |
2625 | out: | |
2626 | cm_deref_id(cm_id_priv); | |
2627 | return -EINVAL; | |
2628 | } | |
2629 | ||
2630 | static int cm_timewait_handler(struct cm_work *work) | |
2631 | { | |
2632 | struct cm_timewait_info *timewait_info; | |
2633 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2634 | int ret; |
2635 | ||
2636 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2637 | spin_lock_irq(&cm.lock); |
2638 | list_del(&timewait_info->list); | |
2639 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2640 | |
2641 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2642 | timewait_info->work.remote_id); | |
2643 | if (!cm_id_priv) | |
2644 | return -EINVAL; | |
2645 | ||
8575329d | 2646 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2647 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2648 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2649 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2650 | goto out; |
2651 | } | |
2652 | cm_id_priv->id.state = IB_CM_IDLE; | |
2653 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2654 | if (!ret) | |
2655 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2656 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2657 | |
2658 | if (ret) | |
2659 | cm_process_work(cm_id_priv, work); | |
2660 | else | |
2661 | cm_deref_id(cm_id_priv); | |
2662 | return 0; | |
2663 | out: | |
2664 | cm_deref_id(cm_id_priv); | |
2665 | return -EINVAL; | |
2666 | } | |
2667 | ||
2668 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2669 | struct cm_id_private *cm_id_priv, | |
2670 | struct ib_cm_sidr_req_param *param) | |
2671 | { | |
2672 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2673 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2674 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
75af9088 | 2675 | sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
a977049d HR |
2676 | sidr_req_msg->service_id = param->service_id; |
2677 | ||
2678 | if (param->private_data && param->private_data_len) | |
2679 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2680 | param->private_data_len); | |
2681 | } | |
2682 | ||
2683 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2684 | struct ib_cm_sidr_req_param *param) | |
2685 | { | |
2686 | struct cm_id_private *cm_id_priv; | |
2687 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2688 | unsigned long flags; |
2689 | int ret; | |
2690 | ||
2691 | if (!param->path || (param->private_data && | |
2692 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2693 | return -EINVAL; | |
2694 | ||
2695 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2696 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2697 | if (ret) | |
2698 | goto out; | |
2699 | ||
2700 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2701 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2702 | cm_id_priv->timeout_ms = param->timeout_ms; |
2703 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2704 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2705 | if (ret) | |
2706 | goto out; | |
2707 | ||
2708 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2709 | param); | |
34816ad9 | 2710 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2711 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2712 | ||
2713 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2714 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2715 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2716 | else |
2717 | ret = -EINVAL; | |
2718 | ||
2719 | if (ret) { | |
2720 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2721 | cm_free_msg(msg); | |
2722 | goto out; | |
2723 | } | |
2724 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2725 | cm_id_priv->msg = msg; | |
2726 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2727 | out: | |
2728 | return ret; | |
2729 | } | |
2730 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2731 | ||
2732 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2733 | struct ib_cm_id *listen_id) | |
2734 | { | |
2735 | struct cm_sidr_req_msg *sidr_req_msg; | |
2736 | struct ib_cm_sidr_req_event_param *param; | |
2737 | ||
2738 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2739 | work->mad_recv_wc->recv_buf.mad; | |
2740 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2741 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2742 | param->listen_id = listen_id; |
a977049d HR |
2743 | param->port = work->port->port_num; |
2744 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2745 | } | |
2746 | ||
2747 | static int cm_sidr_req_handler(struct cm_work *work) | |
2748 | { | |
2749 | struct ib_cm_id *cm_id; | |
2750 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2751 | struct cm_sidr_req_msg *sidr_req_msg; | |
2752 | struct ib_wc *wc; | |
2753 | unsigned long flags; | |
2754 | ||
07d357d0 | 2755 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
2756 | if (IS_ERR(cm_id)) |
2757 | return PTR_ERR(cm_id); | |
2758 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2759 | ||
2760 | /* Record SGID/SLID and request ID for lookup. */ | |
2761 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2762 | work->mad_recv_wc->recv_buf.mad; | |
2763 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2764 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2765 | cm_id_priv->av.dgid.global.interface_id = 0; |
2766 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 2767 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
2768 | &cm_id_priv->av); |
2769 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
2770 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; | |
2771 | cm_id_priv->tid = sidr_req_msg->hdr.tid; | |
2772 | atomic_inc(&cm_id_priv->work_count); | |
2773 | ||
2774 | spin_lock_irqsave(&cm.lock, flags); | |
2775 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); | |
2776 | if (cur_cm_id_priv) { | |
2777 | spin_unlock_irqrestore(&cm.lock, flags); | |
2778 | goto out; /* Duplicate message. */ | |
2779 | } | |
07d357d0 | 2780 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
2781 | sidr_req_msg->service_id, |
2782 | sidr_req_msg->private_data); | |
a977049d HR |
2783 | if (!cur_cm_id_priv) { |
2784 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2785 | spin_unlock_irqrestore(&cm.lock, flags); | |
2786 | /* todo: reply with no match */ | |
2787 | goto out; /* No match. */ | |
2788 | } | |
2789 | atomic_inc(&cur_cm_id_priv->refcount); | |
2790 | spin_unlock_irqrestore(&cm.lock, flags); | |
2791 | ||
2792 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2793 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2794 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2795 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2796 | |
2797 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2798 | cm_process_work(cm_id_priv, work); | |
2799 | cm_deref_id(cur_cm_id_priv); | |
2800 | return 0; | |
2801 | out: | |
2802 | ib_destroy_cm_id(&cm_id_priv->id); | |
2803 | return -EINVAL; | |
2804 | } | |
2805 | ||
2806 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2807 | struct cm_id_private *cm_id_priv, | |
2808 | struct ib_cm_sidr_rep_param *param) | |
2809 | { | |
2810 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2811 | cm_id_priv->tid); | |
2812 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2813 | sidr_rep_msg->status = param->status; | |
2814 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2815 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2816 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2817 | ||
2818 | if (param->info && param->info_length) | |
2819 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2820 | ||
2821 | if (param->private_data && param->private_data_len) | |
2822 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2823 | param->private_data_len); | |
2824 | } | |
2825 | ||
2826 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
2827 | struct ib_cm_sidr_rep_param *param) | |
2828 | { | |
2829 | struct cm_id_private *cm_id_priv; | |
2830 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2831 | unsigned long flags; |
2832 | int ret; | |
2833 | ||
2834 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
2835 | (param->private_data && | |
2836 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
2837 | return -EINVAL; | |
2838 | ||
2839 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2840 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2841 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
2842 | ret = -EINVAL; | |
2843 | goto error; | |
2844 | } | |
2845 | ||
2846 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2847 | if (ret) | |
2848 | goto error; | |
2849 | ||
2850 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
2851 | param); | |
34816ad9 | 2852 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2853 | if (ret) { |
2854 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2855 | cm_free_msg(msg); | |
2856 | return ret; | |
2857 | } | |
2858 | cm_id->state = IB_CM_IDLE; | |
2859 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2860 | ||
2861 | spin_lock_irqsave(&cm.lock, flags); | |
2862 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2863 | spin_unlock_irqrestore(&cm.lock, flags); | |
2864 | return 0; | |
2865 | ||
2866 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2867 | return ret; | |
2868 | } | |
2869 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
2870 | ||
2871 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
2872 | { | |
2873 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2874 | struct ib_cm_sidr_rep_event_param *param; | |
2875 | ||
2876 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2877 | work->mad_recv_wc->recv_buf.mad; | |
2878 | param = &work->cm_event.param.sidr_rep_rcvd; | |
2879 | param->status = sidr_rep_msg->status; | |
2880 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
2881 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
2882 | param->info = &sidr_rep_msg->info; | |
2883 | param->info_len = sidr_rep_msg->info_length; | |
2884 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
2885 | } | |
2886 | ||
2887 | static int cm_sidr_rep_handler(struct cm_work *work) | |
2888 | { | |
2889 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2890 | struct cm_id_private *cm_id_priv; | |
2891 | unsigned long flags; | |
2892 | ||
2893 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2894 | work->mad_recv_wc->recv_buf.mad; | |
2895 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
2896 | if (!cm_id_priv) | |
2897 | return -EINVAL; /* Unmatched reply. */ | |
2898 | ||
2899 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2900 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { | |
2901 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2902 | goto out; | |
2903 | } | |
2904 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 2905 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2906 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
2907 | ||
2908 | cm_format_sidr_rep_event(work); | |
2909 | cm_process_work(cm_id_priv, work); | |
2910 | return 0; | |
2911 | out: | |
2912 | cm_deref_id(cm_id_priv); | |
2913 | return -EINVAL; | |
2914 | } | |
2915 | ||
2916 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
2917 | enum ib_wc_status wc_status) | |
2918 | { | |
2919 | struct cm_id_private *cm_id_priv; | |
2920 | struct ib_cm_event cm_event; | |
2921 | enum ib_cm_state state; | |
2922 | unsigned long flags; | |
2923 | int ret; | |
2924 | ||
2925 | memset(&cm_event, 0, sizeof cm_event); | |
2926 | cm_id_priv = msg->context[0]; | |
2927 | ||
2928 | /* Discard old sends or ones without a response. */ | |
2929 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2930 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; | |
2931 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
2932 | goto discard; | |
2933 | ||
2934 | switch (state) { | |
2935 | case IB_CM_REQ_SENT: | |
2936 | case IB_CM_MRA_REQ_RCVD: | |
2937 | cm_reset_to_idle(cm_id_priv); | |
2938 | cm_event.event = IB_CM_REQ_ERROR; | |
2939 | break; | |
2940 | case IB_CM_REP_SENT: | |
2941 | case IB_CM_MRA_REP_RCVD: | |
2942 | cm_reset_to_idle(cm_id_priv); | |
2943 | cm_event.event = IB_CM_REP_ERROR; | |
2944 | break; | |
2945 | case IB_CM_DREQ_SENT: | |
2946 | cm_enter_timewait(cm_id_priv); | |
2947 | cm_event.event = IB_CM_DREQ_ERROR; | |
2948 | break; | |
2949 | case IB_CM_SIDR_REQ_SENT: | |
2950 | cm_id_priv->id.state = IB_CM_IDLE; | |
2951 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
2952 | break; | |
2953 | default: | |
2954 | goto discard; | |
2955 | } | |
2956 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2957 | cm_event.param.send_status = wc_status; | |
2958 | ||
2959 | /* No other events can occur on the cm_id at this point. */ | |
2960 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
2961 | cm_free_msg(msg); | |
2962 | if (ret) | |
2963 | ib_destroy_cm_id(&cm_id_priv->id); | |
2964 | return; | |
2965 | discard: | |
2966 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2967 | cm_free_msg(msg); | |
2968 | } | |
2969 | ||
2970 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
2971 | struct ib_mad_send_wc *mad_send_wc) | |
2972 | { | |
34816ad9 | 2973 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
a977049d HR |
2974 | |
2975 | switch (mad_send_wc->status) { | |
2976 | case IB_WC_SUCCESS: | |
2977 | case IB_WC_WR_FLUSH_ERR: | |
2978 | cm_free_msg(msg); | |
2979 | break; | |
2980 | default: | |
2981 | if (msg->context[0] && msg->context[1]) | |
2982 | cm_process_send_error(msg, mad_send_wc->status); | |
2983 | else | |
2984 | cm_free_msg(msg); | |
2985 | break; | |
2986 | } | |
2987 | } | |
2988 | ||
2989 | static void cm_work_handler(void *data) | |
2990 | { | |
2991 | struct cm_work *work = data; | |
2992 | int ret; | |
2993 | ||
2994 | switch (work->cm_event.event) { | |
2995 | case IB_CM_REQ_RECEIVED: | |
2996 | ret = cm_req_handler(work); | |
2997 | break; | |
2998 | case IB_CM_MRA_RECEIVED: | |
2999 | ret = cm_mra_handler(work); | |
3000 | break; | |
3001 | case IB_CM_REJ_RECEIVED: | |
3002 | ret = cm_rej_handler(work); | |
3003 | break; | |
3004 | case IB_CM_REP_RECEIVED: | |
3005 | ret = cm_rep_handler(work); | |
3006 | break; | |
3007 | case IB_CM_RTU_RECEIVED: | |
3008 | ret = cm_rtu_handler(work); | |
3009 | break; | |
3010 | case IB_CM_USER_ESTABLISHED: | |
3011 | ret = cm_establish_handler(work); | |
3012 | break; | |
3013 | case IB_CM_DREQ_RECEIVED: | |
3014 | ret = cm_dreq_handler(work); | |
3015 | break; | |
3016 | case IB_CM_DREP_RECEIVED: | |
3017 | ret = cm_drep_handler(work); | |
3018 | break; | |
3019 | case IB_CM_SIDR_REQ_RECEIVED: | |
3020 | ret = cm_sidr_req_handler(work); | |
3021 | break; | |
3022 | case IB_CM_SIDR_REP_RECEIVED: | |
3023 | ret = cm_sidr_rep_handler(work); | |
3024 | break; | |
3025 | case IB_CM_LAP_RECEIVED: | |
3026 | ret = cm_lap_handler(work); | |
3027 | break; | |
3028 | case IB_CM_APR_RECEIVED: | |
3029 | ret = cm_apr_handler(work); | |
3030 | break; | |
3031 | case IB_CM_TIMEWAIT_EXIT: | |
3032 | ret = cm_timewait_handler(work); | |
3033 | break; | |
3034 | default: | |
3035 | ret = -EINVAL; | |
3036 | break; | |
3037 | } | |
3038 | if (ret) | |
3039 | cm_free_work(work); | |
3040 | } | |
3041 | ||
3042 | int ib_cm_establish(struct ib_cm_id *cm_id) | |
3043 | { | |
3044 | struct cm_id_private *cm_id_priv; | |
3045 | struct cm_work *work; | |
3046 | unsigned long flags; | |
3047 | int ret = 0; | |
3048 | ||
3049 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3050 | if (!work) | |
3051 | return -ENOMEM; | |
3052 | ||
3053 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3054 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3055 | switch (cm_id->state) | |
3056 | { | |
3057 | case IB_CM_REP_SENT: | |
3058 | case IB_CM_MRA_REP_RCVD: | |
3059 | cm_id->state = IB_CM_ESTABLISHED; | |
3060 | break; | |
3061 | case IB_CM_ESTABLISHED: | |
3062 | ret = -EISCONN; | |
3063 | break; | |
3064 | default: | |
3065 | ret = -EINVAL; | |
3066 | break; | |
3067 | } | |
3068 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3069 | ||
3070 | if (ret) { | |
3071 | kfree(work); | |
3072 | goto out; | |
3073 | } | |
3074 | ||
3075 | /* | |
3076 | * The CM worker thread may try to destroy the cm_id before it | |
3077 | * can execute this work item. To prevent potential deadlock, | |
3078 | * we need to find the cm_id once we're in the context of the | |
3079 | * worker thread, rather than holding a reference on it. | |
3080 | */ | |
3081 | INIT_WORK(&work->work, cm_work_handler, work); | |
3082 | work->local_id = cm_id->local_id; | |
3083 | work->remote_id = cm_id->remote_id; | |
3084 | work->mad_recv_wc = NULL; | |
3085 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
3086 | queue_work(cm.wq, &work->work); | |
3087 | out: | |
3088 | return ret; | |
3089 | } | |
3090 | EXPORT_SYMBOL(ib_cm_establish); | |
3091 | ||
3092 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3093 | struct ib_mad_recv_wc *mad_recv_wc) | |
3094 | { | |
3095 | struct cm_work *work; | |
3096 | enum ib_cm_event_type event; | |
3097 | int paths = 0; | |
3098 | ||
3099 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3100 | case CM_REQ_ATTR_ID: | |
3101 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3102 | alt_local_lid != 0); | |
3103 | event = IB_CM_REQ_RECEIVED; | |
3104 | break; | |
3105 | case CM_MRA_ATTR_ID: | |
3106 | event = IB_CM_MRA_RECEIVED; | |
3107 | break; | |
3108 | case CM_REJ_ATTR_ID: | |
3109 | event = IB_CM_REJ_RECEIVED; | |
3110 | break; | |
3111 | case CM_REP_ATTR_ID: | |
3112 | event = IB_CM_REP_RECEIVED; | |
3113 | break; | |
3114 | case CM_RTU_ATTR_ID: | |
3115 | event = IB_CM_RTU_RECEIVED; | |
3116 | break; | |
3117 | case CM_DREQ_ATTR_ID: | |
3118 | event = IB_CM_DREQ_RECEIVED; | |
3119 | break; | |
3120 | case CM_DREP_ATTR_ID: | |
3121 | event = IB_CM_DREP_RECEIVED; | |
3122 | break; | |
3123 | case CM_SIDR_REQ_ATTR_ID: | |
3124 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3125 | break; | |
3126 | case CM_SIDR_REP_ATTR_ID: | |
3127 | event = IB_CM_SIDR_REP_RECEIVED; | |
3128 | break; | |
3129 | case CM_LAP_ATTR_ID: | |
3130 | paths = 1; | |
3131 | event = IB_CM_LAP_RECEIVED; | |
3132 | break; | |
3133 | case CM_APR_ATTR_ID: | |
3134 | event = IB_CM_APR_RECEIVED; | |
3135 | break; | |
3136 | default: | |
3137 | ib_free_recv_mad(mad_recv_wc); | |
3138 | return; | |
3139 | } | |
3140 | ||
3141 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, | |
3142 | GFP_KERNEL); | |
3143 | if (!work) { | |
3144 | ib_free_recv_mad(mad_recv_wc); | |
3145 | return; | |
3146 | } | |
3147 | ||
3148 | INIT_WORK(&work->work, cm_work_handler, work); | |
3149 | work->cm_event.event = event; | |
3150 | work->mad_recv_wc = mad_recv_wc; | |
3151 | work->port = (struct cm_port *)mad_agent->context; | |
3152 | queue_work(cm.wq, &work->work); | |
3153 | } | |
3154 | ||
3155 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3156 | struct ib_qp_attr *qp_attr, | |
3157 | int *qp_attr_mask) | |
3158 | { | |
3159 | unsigned long flags; | |
3160 | int ret; | |
3161 | ||
3162 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3163 | switch (cm_id_priv->id.state) { | |
3164 | case IB_CM_REQ_SENT: | |
3165 | case IB_CM_MRA_REQ_RCVD: | |
3166 | case IB_CM_REQ_RCVD: | |
3167 | case IB_CM_MRA_REQ_SENT: | |
3168 | case IB_CM_REP_RCVD: | |
3169 | case IB_CM_MRA_REP_SENT: | |
3170 | case IB_CM_REP_SENT: | |
3171 | case IB_CM_MRA_REP_RCVD: | |
3172 | case IB_CM_ESTABLISHED: | |
3173 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3174 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
ae7971a7 SH |
3175 | qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE | |
3176 | IB_ACCESS_REMOTE_WRITE; | |
a977049d | 3177 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3178 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3179 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3180 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3181 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3182 | ret = 0; | |
3183 | break; | |
3184 | default: | |
3185 | ret = -EINVAL; | |
3186 | break; | |
3187 | } | |
3188 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3189 | return ret; | |
3190 | } | |
3191 | ||
3192 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3193 | struct ib_qp_attr *qp_attr, | |
3194 | int *qp_attr_mask) | |
3195 | { | |
3196 | unsigned long flags; | |
3197 | int ret; | |
3198 | ||
3199 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3200 | switch (cm_id_priv->id.state) { | |
3201 | case IB_CM_REQ_RCVD: | |
3202 | case IB_CM_MRA_REQ_SENT: | |
3203 | case IB_CM_REP_RCVD: | |
3204 | case IB_CM_MRA_REP_SENT: | |
3205 | case IB_CM_REP_SENT: | |
3206 | case IB_CM_MRA_REP_RCVD: | |
3207 | case IB_CM_ESTABLISHED: | |
3208 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3209 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3210 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3211 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3212 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3213 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
ae7971a7 SH |
3214 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3215 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | | |
3216 | IB_QP_MIN_RNR_TIMER; | |
3217 | qp_attr->max_dest_rd_atomic = | |
3218 | cm_id_priv->responder_resources; | |
3219 | qp_attr->min_rnr_timer = 0; | |
3220 | } | |
a977049d HR |
3221 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3222 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3223 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
a977049d HR |
3224 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3225 | } | |
3226 | ret = 0; | |
3227 | break; | |
3228 | default: | |
3229 | ret = -EINVAL; | |
3230 | break; | |
3231 | } | |
3232 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3233 | return ret; | |
3234 | } | |
3235 | ||
3236 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3237 | struct ib_qp_attr *qp_attr, | |
3238 | int *qp_attr_mask) | |
3239 | { | |
3240 | unsigned long flags; | |
3241 | int ret; | |
3242 | ||
3243 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3244 | switch (cm_id_priv->id.state) { | |
3245 | case IB_CM_REP_RCVD: | |
3246 | case IB_CM_MRA_REP_SENT: | |
3247 | case IB_CM_REP_SENT: | |
3248 | case IB_CM_MRA_REP_RCVD: | |
3249 | case IB_CM_ESTABLISHED: | |
ae7971a7 | 3250 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; |
a977049d | 3251 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); |
ae7971a7 SH |
3252 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3253 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3254 | IB_QP_RNR_RETRY | | |
3255 | IB_QP_MAX_QP_RD_ATOMIC; | |
3256 | qp_attr->timeout = cm_id_priv->local_ack_timeout; | |
3257 | qp_attr->retry_cnt = cm_id_priv->retry_count; | |
3258 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3259 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; | |
3260 | } | |
a977049d HR |
3261 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3262 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3263 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3264 | } | |
3265 | ret = 0; | |
3266 | break; | |
3267 | default: | |
3268 | ret = -EINVAL; | |
3269 | break; | |
3270 | } | |
3271 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3272 | return ret; | |
3273 | } | |
3274 | ||
3275 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3276 | struct ib_qp_attr *qp_attr, | |
3277 | int *qp_attr_mask) | |
3278 | { | |
3279 | struct cm_id_private *cm_id_priv; | |
3280 | int ret; | |
3281 | ||
3282 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3283 | switch (qp_attr->qp_state) { | |
3284 | case IB_QPS_INIT: | |
3285 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3286 | break; | |
3287 | case IB_QPS_RTR: | |
3288 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3289 | break; | |
3290 | case IB_QPS_RTS: | |
3291 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3292 | break; | |
3293 | default: | |
3294 | ret = -EINVAL; | |
3295 | break; | |
3296 | } | |
3297 | return ret; | |
3298 | } | |
3299 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3300 | ||
a977049d HR |
3301 | static void cm_add_one(struct ib_device *device) |
3302 | { | |
3303 | struct cm_device *cm_dev; | |
3304 | struct cm_port *port; | |
3305 | struct ib_mad_reg_req reg_req = { | |
3306 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3307 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3308 | }; | |
3309 | struct ib_port_modify port_modify = { | |
3310 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3311 | }; | |
3312 | unsigned long flags; | |
3313 | int ret; | |
3314 | u8 i; | |
3315 | ||
07ebafba TT |
3316 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
3317 | return; | |
3318 | ||
a977049d HR |
3319 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * |
3320 | device->phys_port_cnt, GFP_KERNEL); | |
3321 | if (!cm_dev) | |
3322 | return; | |
3323 | ||
3324 | cm_dev->device = device; | |
cf311cd4 | 3325 | cm_dev->ca_guid = device->node_guid; |
a977049d HR |
3326 | |
3327 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); | |
3328 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3329 | port = &cm_dev->port[i-1]; | |
3330 | port->cm_dev = cm_dev; | |
3331 | port->port_num = i; | |
3332 | port->mad_agent = ib_register_mad_agent(device, i, | |
3333 | IB_QPT_GSI, | |
3334 | ®_req, | |
3335 | 0, | |
3336 | cm_send_handler, | |
3337 | cm_recv_handler, | |
3338 | port); | |
3339 | if (IS_ERR(port->mad_agent)) | |
cf311cd4 | 3340 | goto error1; |
a977049d HR |
3341 | |
3342 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3343 | if (ret) | |
cf311cd4 | 3344 | goto error2; |
a977049d HR |
3345 | } |
3346 | ib_set_client_data(device, &cm_client, cm_dev); | |
3347 | ||
3348 | write_lock_irqsave(&cm.device_lock, flags); | |
3349 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3350 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3351 | return; | |
3352 | ||
a977049d | 3353 | error2: |
cf311cd4 SH |
3354 | ib_unregister_mad_agent(port->mad_agent); |
3355 | error1: | |
a977049d HR |
3356 | port_modify.set_port_cap_mask = 0; |
3357 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3358 | while (--i) { | |
3359 | port = &cm_dev->port[i-1]; | |
3360 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3361 | ib_unregister_mad_agent(port->mad_agent); | |
3362 | } | |
a977049d HR |
3363 | kfree(cm_dev); |
3364 | } | |
3365 | ||
3366 | static void cm_remove_one(struct ib_device *device) | |
3367 | { | |
3368 | struct cm_device *cm_dev; | |
3369 | struct cm_port *port; | |
3370 | struct ib_port_modify port_modify = { | |
3371 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3372 | }; | |
3373 | unsigned long flags; | |
3374 | int i; | |
3375 | ||
3376 | cm_dev = ib_get_client_data(device, &cm_client); | |
3377 | if (!cm_dev) | |
3378 | return; | |
3379 | ||
3380 | write_lock_irqsave(&cm.device_lock, flags); | |
3381 | list_del(&cm_dev->list); | |
3382 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3383 | ||
3384 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3385 | port = &cm_dev->port[i-1]; | |
3386 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3387 | ib_unregister_mad_agent(port->mad_agent); | |
3388 | } | |
3389 | kfree(cm_dev); | |
3390 | } | |
3391 | ||
3392 | static int __init ib_cm_init(void) | |
3393 | { | |
3394 | int ret; | |
3395 | ||
3396 | memset(&cm, 0, sizeof cm); | |
3397 | INIT_LIST_HEAD(&cm.device_list); | |
3398 | rwlock_init(&cm.device_lock); | |
3399 | spin_lock_init(&cm.lock); | |
3400 | cm.listen_service_table = RB_ROOT; | |
3401 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3402 | cm.remote_id_table = RB_ROOT; | |
3403 | cm.remote_qp_table = RB_ROOT; | |
3404 | cm.remote_sidr_table = RB_ROOT; | |
3405 | idr_init(&cm.local_id_table); | |
f06d2653 | 3406 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
a977049d | 3407 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
8575329d | 3408 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d HR |
3409 | |
3410 | cm.wq = create_workqueue("ib_cm"); | |
3411 | if (!cm.wq) | |
3412 | return -ENOMEM; | |
3413 | ||
3414 | ret = ib_register_client(&cm_client); | |
3415 | if (ret) | |
3416 | goto error; | |
3417 | ||
3418 | return 0; | |
3419 | error: | |
3420 | destroy_workqueue(cm.wq); | |
3421 | return ret; | |
3422 | } | |
3423 | ||
3424 | static void __exit ib_cm_cleanup(void) | |
3425 | { | |
8575329d SH |
3426 | struct cm_timewait_info *timewait_info, *tmp; |
3427 | ||
3428 | spin_lock_irq(&cm.lock); | |
3429 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3430 | cancel_delayed_work(&timewait_info->work.work); | |
3431 | spin_unlock_irq(&cm.lock); | |
3432 | ||
a977049d | 3433 | destroy_workqueue(cm.wq); |
8575329d SH |
3434 | |
3435 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3436 | list_del(&timewait_info->list); | |
3437 | kfree(timewait_info); | |
3438 | } | |
3439 | ||
a977049d | 3440 | ib_unregister_client(&cm_client); |
5d7edb3c | 3441 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3442 | } |
3443 | ||
3444 | module_init(ib_cm_init); | |
3445 | module_exit(ib_cm_cleanup); | |
3446 |