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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 | ||
243 | data = kmalloc(private_data_len, GFP_KERNEL); | |
244 | if (!data) | |
245 | return ERR_PTR(-ENOMEM); | |
246 | ||
247 | memcpy(data, private_data, private_data_len); | |
248 | return data; | |
249 | } | |
250 | ||
251 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
252 | void *private_data, u8 private_data_len) | |
253 | { | |
254 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
255 | kfree(cm_id_priv->private_data); | |
256 | ||
257 | cm_id_priv->private_data = private_data; | |
258 | cm_id_priv->private_data_len = private_data_len; | |
259 | } | |
260 | ||
ca222c6b SH |
261 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
262 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
263 | { |
264 | av->port = port; | |
265 | av->pkey_index = wc->pkey_index; | |
ca222c6b SH |
266 | ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc, |
267 | grh, &av->ah_attr); | |
a977049d HR |
268 | } |
269 | ||
270 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
271 | { | |
272 | struct cm_device *cm_dev; | |
273 | struct cm_port *port = NULL; | |
274 | unsigned long flags; | |
275 | int ret; | |
276 | u8 p; | |
277 | ||
278 | read_lock_irqsave(&cm.device_lock, flags); | |
279 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
280 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, | |
281 | &p, NULL)) { | |
282 | port = &cm_dev->port[p-1]; | |
283 | break; | |
284 | } | |
285 | } | |
286 | read_unlock_irqrestore(&cm.device_lock, flags); | |
287 | ||
288 | if (!port) | |
289 | return -EINVAL; | |
290 | ||
291 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, | |
292 | be16_to_cpu(path->pkey), &av->pkey_index); | |
293 | if (ret) | |
294 | return ret; | |
295 | ||
296 | av->port = port; | |
ca222c6b SH |
297 | ib_init_ah_from_path(cm_dev->device, port->port_num, path, |
298 | &av->ah_attr); | |
a977049d HR |
299 | av->packet_life_time = path->packet_life_time; |
300 | return 0; | |
301 | } | |
302 | ||
303 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
304 | { | |
305 | unsigned long flags; | |
f06d2653 | 306 | int ret, id; |
de1bb1a6 | 307 | static int next_id; |
a977049d HR |
308 | |
309 | do { | |
310 | spin_lock_irqsave(&cm.lock, flags); | |
f06d2653 SH |
311 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
312 | next_id++, &id); | |
a977049d HR |
313 | spin_unlock_irqrestore(&cm.lock, flags); |
314 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
f06d2653 SH |
315 | |
316 | cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand); | |
a977049d HR |
317 | return ret; |
318 | } | |
319 | ||
97f52eb4 | 320 | static void cm_free_id(__be32 local_id) |
a977049d HR |
321 | { |
322 | unsigned long flags; | |
323 | ||
324 | spin_lock_irqsave(&cm.lock, flags); | |
f06d2653 SH |
325 | idr_remove(&cm.local_id_table, |
326 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
327 | spin_unlock_irqrestore(&cm.lock, flags); |
328 | } | |
329 | ||
97f52eb4 | 330 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
331 | { |
332 | struct cm_id_private *cm_id_priv; | |
333 | ||
f06d2653 SH |
334 | cm_id_priv = idr_find(&cm.local_id_table, |
335 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
336 | if (cm_id_priv) { |
337 | if (cm_id_priv->id.remote_id == remote_id) | |
338 | atomic_inc(&cm_id_priv->refcount); | |
339 | else | |
340 | cm_id_priv = NULL; | |
341 | } | |
342 | ||
343 | return cm_id_priv; | |
344 | } | |
345 | ||
97f52eb4 | 346 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
347 | { |
348 | struct cm_id_private *cm_id_priv; | |
349 | unsigned long flags; | |
350 | ||
351 | spin_lock_irqsave(&cm.lock, flags); | |
352 | cm_id_priv = cm_get_id(local_id, remote_id); | |
353 | spin_unlock_irqrestore(&cm.lock, flags); | |
354 | ||
355 | return cm_id_priv; | |
356 | } | |
357 | ||
6e61d04f SH |
358 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
359 | { | |
360 | int i; | |
361 | ||
362 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) | |
363 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & | |
364 | ((unsigned long *) mask)[i]; | |
365 | } | |
366 | ||
367 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
368 | struct ib_cm_compare_data *dst_data) | |
369 | { | |
370 | u8 src[IB_CM_COMPARE_SIZE]; | |
371 | u8 dst[IB_CM_COMPARE_SIZE]; | |
372 | ||
373 | if (!src_data || !dst_data) | |
374 | return 0; | |
375 | ||
376 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
377 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
378 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); | |
379 | } | |
380 | ||
381 | static int cm_compare_private_data(u8 *private_data, | |
382 | struct ib_cm_compare_data *dst_data) | |
383 | { | |
384 | u8 src[IB_CM_COMPARE_SIZE]; | |
385 | ||
386 | if (!dst_data) | |
387 | return 0; | |
388 | ||
389 | cm_mask_copy(src, private_data, dst_data->mask); | |
390 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); | |
391 | } | |
392 | ||
a977049d HR |
393 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
394 | { | |
395 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
396 | struct rb_node *parent = NULL; | |
397 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
398 | __be64 service_id = cm_id_priv->id.service_id; |
399 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 400 | int data_cmp; |
a977049d HR |
401 | |
402 | while (*link) { | |
403 | parent = *link; | |
404 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
405 | service_node); | |
6e61d04f SH |
406 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
407 | cur_cm_id_priv->compare_data); | |
a977049d | 408 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 409 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
410 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
411 | !data_cmp) | |
07d357d0 SH |
412 | return cur_cm_id_priv; |
413 | ||
414 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
415 | link = &(*link)->rb_left; | |
416 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
417 | link = &(*link)->rb_right; | |
418 | else if (service_id < cur_cm_id_priv->id.service_id) | |
a977049d | 419 | link = &(*link)->rb_left; |
6e61d04f SH |
420 | else if (service_id > cur_cm_id_priv->id.service_id) |
421 | link = &(*link)->rb_right; | |
422 | else if (data_cmp < 0) | |
423 | link = &(*link)->rb_left; | |
a977049d HR |
424 | else |
425 | link = &(*link)->rb_right; | |
426 | } | |
427 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
428 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
429 | return NULL; | |
430 | } | |
431 | ||
07d357d0 | 432 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f SH |
433 | __be64 service_id, |
434 | u8 *private_data) | |
a977049d HR |
435 | { |
436 | struct rb_node *node = cm.listen_service_table.rb_node; | |
437 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 438 | int data_cmp; |
a977049d HR |
439 | |
440 | while (node) { | |
441 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
442 | data_cmp = cm_compare_private_data(private_data, |
443 | cm_id_priv->compare_data); | |
a977049d | 444 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 445 | cm_id_priv->id.service_id && |
6e61d04f | 446 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 447 | return cm_id_priv; |
07d357d0 SH |
448 | |
449 | if (device < cm_id_priv->id.device) | |
450 | node = node->rb_left; | |
451 | else if (device > cm_id_priv->id.device) | |
452 | node = node->rb_right; | |
453 | else if (service_id < cm_id_priv->id.service_id) | |
a977049d | 454 | node = node->rb_left; |
6e61d04f SH |
455 | else if (service_id > cm_id_priv->id.service_id) |
456 | node = node->rb_right; | |
457 | else if (data_cmp < 0) | |
458 | node = node->rb_left; | |
a977049d HR |
459 | else |
460 | node = node->rb_right; | |
461 | } | |
462 | return NULL; | |
463 | } | |
464 | ||
465 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
466 | *timewait_info) | |
467 | { | |
468 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
469 | struct rb_node *parent = NULL; | |
470 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
471 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
472 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
473 | |
474 | while (*link) { | |
475 | parent = *link; | |
476 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
477 | remote_id_node); | |
478 | if (remote_id < cur_timewait_info->work.remote_id) | |
479 | link = &(*link)->rb_left; | |
480 | else if (remote_id > cur_timewait_info->work.remote_id) | |
481 | link = &(*link)->rb_right; | |
482 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
483 | link = &(*link)->rb_left; | |
484 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
485 | link = &(*link)->rb_right; | |
486 | else | |
487 | return cur_timewait_info; | |
488 | } | |
489 | timewait_info->inserted_remote_id = 1; | |
490 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
491 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
492 | return NULL; | |
493 | } | |
494 | ||
97f52eb4 SH |
495 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
496 | __be32 remote_id) | |
a977049d HR |
497 | { |
498 | struct rb_node *node = cm.remote_id_table.rb_node; | |
499 | struct cm_timewait_info *timewait_info; | |
500 | ||
501 | while (node) { | |
502 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
503 | remote_id_node); | |
504 | if (remote_id < timewait_info->work.remote_id) | |
505 | node = node->rb_left; | |
506 | else if (remote_id > timewait_info->work.remote_id) | |
507 | node = node->rb_right; | |
508 | else if (remote_ca_guid < timewait_info->remote_ca_guid) | |
509 | node = node->rb_left; | |
510 | else if (remote_ca_guid > timewait_info->remote_ca_guid) | |
511 | node = node->rb_right; | |
512 | else | |
513 | return timewait_info; | |
514 | } | |
515 | return NULL; | |
516 | } | |
517 | ||
518 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
519 | *timewait_info) | |
520 | { | |
521 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
522 | struct rb_node *parent = NULL; | |
523 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
524 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
525 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
526 | |
527 | while (*link) { | |
528 | parent = *link; | |
529 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
530 | remote_qp_node); | |
531 | if (remote_qpn < cur_timewait_info->remote_qpn) | |
532 | link = &(*link)->rb_left; | |
533 | else if (remote_qpn > cur_timewait_info->remote_qpn) | |
534 | link = &(*link)->rb_right; | |
535 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
536 | link = &(*link)->rb_left; | |
537 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
538 | link = &(*link)->rb_right; | |
539 | else | |
540 | return cur_timewait_info; | |
541 | } | |
542 | timewait_info->inserted_remote_qp = 1; | |
543 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
544 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
545 | return NULL; | |
546 | } | |
547 | ||
548 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
549 | *cm_id_priv) | |
550 | { | |
551 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
552 | struct rb_node *parent = NULL; | |
553 | struct cm_id_private *cur_cm_id_priv; | |
554 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 555 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
556 | |
557 | while (*link) { | |
558 | parent = *link; | |
559 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
560 | sidr_id_node); | |
561 | if (remote_id < cur_cm_id_priv->id.remote_id) | |
562 | link = &(*link)->rb_left; | |
563 | else if (remote_id > cur_cm_id_priv->id.remote_id) | |
564 | link = &(*link)->rb_right; | |
565 | else { | |
566 | int cmp; | |
567 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
568 | sizeof *port_gid); | |
569 | if (cmp < 0) | |
570 | link = &(*link)->rb_left; | |
571 | else if (cmp > 0) | |
572 | link = &(*link)->rb_right; | |
573 | else | |
574 | return cur_cm_id_priv; | |
575 | } | |
576 | } | |
577 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
578 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
579 | return NULL; | |
580 | } | |
581 | ||
582 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
583 | enum ib_cm_sidr_status status) | |
584 | { | |
585 | struct ib_cm_sidr_rep_param param; | |
586 | ||
587 | memset(¶m, 0, sizeof param); | |
588 | param.status = status; | |
589 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
590 | } | |
591 | ||
07d357d0 SH |
592 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
593 | ib_cm_handler cm_handler, | |
a977049d HR |
594 | void *context) |
595 | { | |
596 | struct cm_id_private *cm_id_priv; | |
597 | int ret; | |
598 | ||
de6eb66b | 599 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
600 | if (!cm_id_priv) |
601 | return ERR_PTR(-ENOMEM); | |
602 | ||
a977049d | 603 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 604 | cm_id_priv->id.device = device; |
a977049d HR |
605 | cm_id_priv->id.cm_handler = cm_handler; |
606 | cm_id_priv->id.context = context; | |
354ba39c | 607 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
608 | ret = cm_alloc_id(cm_id_priv); |
609 | if (ret) | |
610 | goto error; | |
611 | ||
612 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 613 | init_completion(&cm_id_priv->comp); |
a977049d HR |
614 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
615 | atomic_set(&cm_id_priv->work_count, -1); | |
616 | atomic_set(&cm_id_priv->refcount, 1); | |
617 | return &cm_id_priv->id; | |
618 | ||
619 | error: | |
620 | kfree(cm_id_priv); | |
621 | return ERR_PTR(-ENOMEM); | |
622 | } | |
623 | EXPORT_SYMBOL(ib_create_cm_id); | |
624 | ||
625 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
626 | { | |
627 | struct cm_work *work; | |
628 | ||
629 | if (list_empty(&cm_id_priv->work_list)) | |
630 | return NULL; | |
631 | ||
632 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
633 | list_del(&work->list); | |
634 | return work; | |
635 | } | |
636 | ||
637 | static void cm_free_work(struct cm_work *work) | |
638 | { | |
639 | if (work->mad_recv_wc) | |
640 | ib_free_recv_mad(work->mad_recv_wc); | |
641 | kfree(work); | |
642 | } | |
643 | ||
644 | static inline int cm_convert_to_ms(int iba_time) | |
645 | { | |
646 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
647 | return 1 << max(iba_time - 8, 0); | |
648 | } | |
649 | ||
650 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) | |
651 | { | |
a977049d HR |
652 | if (timewait_info->inserted_remote_id) { |
653 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
654 | timewait_info->inserted_remote_id = 0; | |
655 | } | |
656 | ||
657 | if (timewait_info->inserted_remote_qp) { | |
658 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
659 | timewait_info->inserted_remote_qp = 0; | |
660 | } | |
a977049d HR |
661 | } |
662 | ||
97f52eb4 | 663 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
664 | { |
665 | struct cm_timewait_info *timewait_info; | |
666 | ||
de6eb66b | 667 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
668 | if (!timewait_info) |
669 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
670 | |
671 | timewait_info->work.local_id = local_id; | |
672 | INIT_WORK(&timewait_info->work.work, cm_work_handler, | |
673 | &timewait_info->work); | |
674 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; | |
675 | return timewait_info; | |
676 | } | |
677 | ||
678 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
679 | { | |
680 | int wait_time; | |
8575329d | 681 | unsigned long flags; |
a977049d | 682 | |
8575329d | 683 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 684 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
685 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
686 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 687 | |
a977049d HR |
688 | /* |
689 | * The cm_id could be destroyed by the user before we exit timewait. | |
690 | * To protect against this, we search for the cm_id after exiting | |
691 | * timewait before notifying the user that we've exited timewait. | |
692 | */ | |
693 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
694 | wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout); | |
695 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
696 | msecs_to_jiffies(wait_time)); | |
697 | cm_id_priv->timewait_info = NULL; | |
698 | } | |
699 | ||
700 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
701 | { | |
8575329d SH |
702 | unsigned long flags; |
703 | ||
a977049d HR |
704 | cm_id_priv->id.state = IB_CM_IDLE; |
705 | if (cm_id_priv->timewait_info) { | |
8575329d | 706 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 707 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 708 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
709 | kfree(cm_id_priv->timewait_info); |
710 | cm_id_priv->timewait_info = NULL; | |
711 | } | |
712 | } | |
713 | ||
04c33543 | 714 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
715 | { |
716 | struct cm_id_private *cm_id_priv; | |
717 | struct cm_work *work; | |
718 | unsigned long flags; | |
719 | ||
720 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
721 | retest: | |
722 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
723 | switch (cm_id->state) { | |
724 | case IB_CM_LISTEN: | |
725 | cm_id->state = IB_CM_IDLE; | |
726 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
727 | spin_lock_irqsave(&cm.lock, flags); | |
728 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); | |
729 | spin_unlock_irqrestore(&cm.lock, flags); | |
730 | break; | |
731 | case IB_CM_SIDR_REQ_SENT: | |
732 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 733 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
734 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
735 | break; | |
736 | case IB_CM_SIDR_REQ_RCVD: | |
737 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
738 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); | |
739 | break; | |
740 | case IB_CM_REQ_SENT: | |
227eca83 SH |
741 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
742 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
743 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, | |
744 | &cm_id_priv->av.port->cm_dev->ca_guid, | |
745 | sizeof cm_id_priv->av.port->cm_dev->ca_guid, | |
746 | NULL, 0); | |
747 | break; | |
04c33543 MT |
748 | case IB_CM_REQ_RCVD: |
749 | if (err == -ENOMEM) { | |
750 | /* Do not reject to allow future retries. */ | |
751 | cm_reset_to_idle(cm_id_priv); | |
752 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
753 | } else { | |
754 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
755 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, | |
756 | NULL, 0, NULL, 0); | |
757 | } | |
758 | break; | |
a977049d HR |
759 | case IB_CM_MRA_REQ_RCVD: |
760 | case IB_CM_REP_SENT: | |
761 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 762 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 763 | /* Fall through */ |
a977049d HR |
764 | case IB_CM_MRA_REQ_SENT: |
765 | case IB_CM_REP_RCVD: | |
766 | case IB_CM_MRA_REP_SENT: | |
767 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
227eca83 SH |
768 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
769 | NULL, 0, NULL, 0); | |
a977049d HR |
770 | break; |
771 | case IB_CM_ESTABLISHED: | |
772 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
773 | ib_send_cm_dreq(cm_id, NULL, 0); | |
774 | goto retest; | |
775 | case IB_CM_DREQ_SENT: | |
34816ad9 | 776 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
777 | cm_enter_timewait(cm_id_priv); |
778 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
779 | break; | |
780 | case IB_CM_DREQ_RCVD: | |
781 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
782 | ib_send_cm_drep(cm_id, NULL, 0); | |
783 | break; | |
784 | default: | |
785 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
786 | break; | |
787 | } | |
788 | ||
789 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
790 | cm_deref_id(cm_id_priv); |
791 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
792 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
793 | cm_free_work(work); | |
6e61d04f SH |
794 | kfree(cm_id_priv->compare_data); |
795 | kfree(cm_id_priv->private_data); | |
a977049d HR |
796 | kfree(cm_id_priv); |
797 | } | |
04c33543 MT |
798 | |
799 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
800 | { | |
801 | cm_destroy_id(cm_id, 0); | |
802 | } | |
a977049d HR |
803 | EXPORT_SYMBOL(ib_destroy_cm_id); |
804 | ||
6e61d04f SH |
805 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
806 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
807 | { |
808 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
809 | unsigned long flags; | |
810 | int ret = 0; | |
811 | ||
97f52eb4 SH |
812 | service_mask = service_mask ? service_mask : |
813 | __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
814 | service_id &= service_mask; |
815 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
816 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
817 | return -EINVAL; | |
818 | ||
819 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
820 | if (cm_id->state != IB_CM_IDLE) |
821 | return -EINVAL; | |
822 | ||
823 | if (compare_data) { | |
824 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
825 | GFP_KERNEL); | |
826 | if (!cm_id_priv->compare_data) | |
827 | return -ENOMEM; | |
828 | cm_mask_copy(cm_id_priv->compare_data->data, | |
829 | compare_data->data, compare_data->mask); | |
830 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
831 | IB_CM_COMPARE_SIZE); | |
832 | } | |
a977049d HR |
833 | |
834 | cm_id->state = IB_CM_LISTEN; | |
835 | ||
836 | spin_lock_irqsave(&cm.lock, flags); | |
837 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 SH |
838 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
839 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
840 | } else { |
841 | cm_id->service_id = service_id; | |
842 | cm_id->service_mask = service_mask; | |
843 | } | |
844 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
845 | spin_unlock_irqrestore(&cm.lock, flags); | |
846 | ||
847 | if (cur_cm_id_priv) { | |
848 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
849 | kfree(cm_id_priv->compare_data); |
850 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
851 | ret = -EBUSY; |
852 | } | |
853 | return ret; | |
854 | } | |
855 | EXPORT_SYMBOL(ib_cm_listen); | |
856 | ||
97f52eb4 SH |
857 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
858 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
859 | { |
860 | u64 hi_tid, low_tid; | |
861 | ||
862 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
863 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
864 | (msg_seq << 30)); | |
a977049d HR |
865 | return cpu_to_be64(hi_tid | low_tid); |
866 | } | |
867 | ||
868 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 869 | __be16 attr_id, __be64 tid) |
a977049d HR |
870 | { |
871 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
872 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
873 | hdr->class_version = IB_CM_CLASS_VERSION; | |
874 | hdr->method = IB_MGMT_METHOD_SEND; | |
875 | hdr->attr_id = attr_id; | |
876 | hdr->tid = tid; | |
877 | } | |
878 | ||
879 | static void cm_format_req(struct cm_req_msg *req_msg, | |
880 | struct cm_id_private *cm_id_priv, | |
881 | struct ib_cm_req_param *param) | |
882 | { | |
883 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, | |
884 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
885 | ||
886 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
887 | req_msg->service_id = param->service_id; | |
888 | req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
889 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); | |
890 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
891 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
892 | cm_req_set_remote_resp_timeout(req_msg, | |
893 | param->remote_cm_response_timeout); | |
894 | cm_req_set_qp_type(req_msg, param->qp_type); | |
895 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
896 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
897 | cm_req_set_local_resp_timeout(req_msg, | |
898 | param->local_cm_response_timeout); | |
899 | cm_req_set_retry_count(req_msg, param->retry_count); | |
900 | req_msg->pkey = param->primary_path->pkey; | |
901 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
902 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
903 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
904 | cm_req_set_srq(req_msg, param->srq); | |
905 | ||
906 | req_msg->primary_local_lid = param->primary_path->slid; | |
907 | req_msg->primary_remote_lid = param->primary_path->dlid; | |
908 | req_msg->primary_local_gid = param->primary_path->sgid; | |
909 | req_msg->primary_remote_gid = param->primary_path->dgid; | |
910 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); | |
911 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); | |
912 | req_msg->primary_traffic_class = param->primary_path->traffic_class; | |
913 | req_msg->primary_hop_limit = param->primary_path->hop_limit; | |
914 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); | |
915 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ | |
916 | cm_req_set_primary_local_ack_timeout(req_msg, | |
917 | min(31, param->primary_path->packet_life_time + 1)); | |
918 | ||
919 | if (param->alternate_path) { | |
920 | req_msg->alt_local_lid = param->alternate_path->slid; | |
921 | req_msg->alt_remote_lid = param->alternate_path->dlid; | |
922 | req_msg->alt_local_gid = param->alternate_path->sgid; | |
923 | req_msg->alt_remote_gid = param->alternate_path->dgid; | |
924 | cm_req_set_alt_flow_label(req_msg, | |
925 | param->alternate_path->flow_label); | |
926 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); | |
927 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; | |
928 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; | |
929 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); | |
930 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ | |
931 | cm_req_set_alt_local_ack_timeout(req_msg, | |
932 | min(31, param->alternate_path->packet_life_time + 1)); | |
933 | } | |
934 | ||
935 | if (param->private_data && param->private_data_len) | |
936 | memcpy(req_msg->private_data, param->private_data, | |
937 | param->private_data_len); | |
938 | } | |
939 | ||
858119e1 | 940 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
941 | { |
942 | /* peer-to-peer not supported */ | |
943 | if (param->peer_to_peer) | |
944 | return -EINVAL; | |
945 | ||
946 | if (!param->primary_path) | |
947 | return -EINVAL; | |
948 | ||
949 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
950 | return -EINVAL; | |
951 | ||
952 | if (param->private_data && | |
953 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
954 | return -EINVAL; | |
955 | ||
956 | if (param->alternate_path && | |
957 | (param->alternate_path->pkey != param->primary_path->pkey || | |
958 | param->alternate_path->mtu != param->primary_path->mtu)) | |
959 | return -EINVAL; | |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
964 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
965 | struct ib_cm_req_param *param) | |
966 | { | |
967 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
968 | struct cm_req_msg *req_msg; |
969 | unsigned long flags; | |
970 | int ret; | |
971 | ||
972 | ret = cm_validate_req_param(param); | |
973 | if (ret) | |
974 | return ret; | |
975 | ||
976 | /* Verify that we're not in timewait. */ | |
977 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
978 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
979 | if (cm_id->state != IB_CM_IDLE) { | |
980 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
981 | ret = -EINVAL; | |
982 | goto out; | |
983 | } | |
984 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
985 | ||
986 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
987 | id.local_id); | |
75df23e2 SH |
988 | if (IS_ERR(cm_id_priv->timewait_info)) { |
989 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 990 | goto out; |
75df23e2 | 991 | } |
a977049d HR |
992 | |
993 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
994 | if (ret) | |
995 | goto error1; | |
996 | if (param->alternate_path) { | |
997 | ret = cm_init_av_by_path(param->alternate_path, | |
998 | &cm_id_priv->alt_av); | |
999 | if (ret) | |
1000 | goto error1; | |
1001 | } | |
1002 | cm_id->service_id = param->service_id; | |
97f52eb4 | 1003 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1004 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1005 | param->primary_path->packet_life_time) * 2 + | |
1006 | cm_convert_to_ms( | |
1007 | param->remote_cm_response_timeout); | |
1008 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1009 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1010 | cm_id_priv->responder_resources = param->responder_resources; | |
1011 | cm_id_priv->retry_count = param->retry_count; | |
1012 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
ae7971a7 | 1013 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1014 | |
1015 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1016 | if (ret) | |
1017 | goto error1; | |
1018 | ||
1019 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1020 | cm_format_req(req_msg, cm_id_priv, param); | |
1021 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1022 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1023 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1024 | ||
1025 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1026 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
1027 | cm_id_priv->local_ack_timeout = | |
1028 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1029 | ||
1030 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1031 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1032 | if (ret) { |
1033 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1034 | goto error2; | |
1035 | } | |
1036 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1037 | cm_id->state = IB_CM_REQ_SENT; | |
1038 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1039 | return 0; | |
1040 | ||
1041 | error2: cm_free_msg(cm_id_priv->msg); | |
1042 | error1: kfree(cm_id_priv->timewait_info); | |
1043 | out: return ret; | |
1044 | } | |
1045 | EXPORT_SYMBOL(ib_send_cm_req); | |
1046 | ||
1047 | static int cm_issue_rej(struct cm_port *port, | |
1048 | struct ib_mad_recv_wc *mad_recv_wc, | |
1049 | enum ib_cm_rej_reason reason, | |
1050 | enum cm_msg_response msg_rejected, | |
1051 | void *ari, u8 ari_length) | |
1052 | { | |
1053 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1054 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1055 | int ret; | |
1056 | ||
1057 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1058 | if (ret) | |
1059 | return ret; | |
1060 | ||
1061 | /* We just need common CM header information. Cast to any message. */ | |
1062 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1063 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1064 | ||
1065 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1066 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1067 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1068 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1069 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1070 | |
1071 | if (ari && ari_length) { | |
1072 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1073 | memcpy(rej_msg->ari, ari, ari_length); | |
1074 | } | |
1075 | ||
34816ad9 | 1076 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1077 | if (ret) |
1078 | cm_free_msg(msg); | |
1079 | ||
1080 | return ret; | |
1081 | } | |
1082 | ||
97f52eb4 SH |
1083 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1084 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1085 | { |
1086 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1087 | ((local_ca_guid == remote_ca_guid) && | |
1088 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1089 | } | |
1090 | ||
858119e1 | 1091 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1092 | struct ib_sa_path_rec *primary_path, |
1093 | struct ib_sa_path_rec *alt_path) | |
1094 | { | |
1095 | memset(primary_path, 0, sizeof *primary_path); | |
1096 | primary_path->dgid = req_msg->primary_local_gid; | |
1097 | primary_path->sgid = req_msg->primary_remote_gid; | |
1098 | primary_path->dlid = req_msg->primary_local_lid; | |
1099 | primary_path->slid = req_msg->primary_remote_lid; | |
1100 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1101 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1102 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1103 | primary_path->reversible = 1; | |
1104 | primary_path->pkey = req_msg->pkey; | |
1105 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1106 | primary_path->mtu_selector = IB_SA_EQ; | |
1107 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1108 | primary_path->rate_selector = IB_SA_EQ; | |
1109 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1110 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1111 | primary_path->packet_life_time = | |
1112 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1113 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1114 | ||
1115 | if (req_msg->alt_local_lid) { | |
1116 | memset(alt_path, 0, sizeof *alt_path); | |
1117 | alt_path->dgid = req_msg->alt_local_gid; | |
1118 | alt_path->sgid = req_msg->alt_remote_gid; | |
1119 | alt_path->dlid = req_msg->alt_local_lid; | |
1120 | alt_path->slid = req_msg->alt_remote_lid; | |
1121 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1122 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1123 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1124 | alt_path->reversible = 1; | |
1125 | alt_path->pkey = req_msg->pkey; | |
1126 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1127 | alt_path->mtu_selector = IB_SA_EQ; | |
1128 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1129 | alt_path->rate_selector = IB_SA_EQ; | |
1130 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1131 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1132 | alt_path->packet_life_time = | |
1133 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1134 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | static void cm_format_req_event(struct cm_work *work, | |
1139 | struct cm_id_private *cm_id_priv, | |
1140 | struct ib_cm_id *listen_id) | |
1141 | { | |
1142 | struct cm_req_msg *req_msg; | |
1143 | struct ib_cm_req_event_param *param; | |
1144 | ||
1145 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1146 | param = &work->cm_event.param.req_rcvd; | |
1147 | param->listen_id = listen_id; | |
a977049d HR |
1148 | param->port = cm_id_priv->av.port->port_num; |
1149 | param->primary_path = &work->path[0]; | |
1150 | if (req_msg->alt_local_lid) | |
1151 | param->alternate_path = &work->path[1]; | |
1152 | else | |
1153 | param->alternate_path = NULL; | |
1154 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1155 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1156 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1157 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1158 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1159 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1160 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1161 | param->local_cm_response_timeout = | |
1162 | cm_req_get_remote_resp_timeout(req_msg); | |
1163 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1164 | param->remote_cm_response_timeout = | |
1165 | cm_req_get_local_resp_timeout(req_msg); | |
1166 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1167 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1168 | param->srq = cm_req_get_srq(req_msg); | |
1169 | work->cm_event.private_data = &req_msg->private_data; | |
1170 | } | |
1171 | ||
1172 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1173 | struct cm_work *work) | |
1174 | { | |
1175 | unsigned long flags; | |
1176 | int ret; | |
1177 | ||
1178 | /* We will typically only have the current event to report. */ | |
1179 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1180 | cm_free_work(work); | |
1181 | ||
1182 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
1183 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1184 | work = cm_dequeue_work(cm_id_priv); | |
1185 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1186 | BUG_ON(!work); | |
1187 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1188 | &work->cm_event); | |
1189 | cm_free_work(work); | |
1190 | } | |
1191 | cm_deref_id(cm_id_priv); | |
1192 | if (ret) | |
04c33543 | 1193 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1194 | } |
1195 | ||
1196 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1197 | struct cm_id_private *cm_id_priv, | |
1198 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1199 | const void *private_data, u8 private_data_len) | |
1200 | { | |
1201 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1202 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1203 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1204 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1205 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1206 | ||
1207 | if (private_data && private_data_len) | |
1208 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1209 | } | |
1210 | ||
1211 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1212 | struct cm_id_private *cm_id_priv, | |
1213 | enum ib_cm_rej_reason reason, | |
1214 | void *ari, | |
1215 | u8 ari_length, | |
1216 | const void *private_data, | |
1217 | u8 private_data_len) | |
1218 | { | |
1219 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1220 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1221 | ||
1222 | switch(cm_id_priv->id.state) { | |
1223 | case IB_CM_REQ_RCVD: | |
1224 | rej_msg->local_comm_id = 0; | |
1225 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1226 | break; | |
1227 | case IB_CM_MRA_REQ_SENT: | |
1228 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1229 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1230 | break; | |
1231 | case IB_CM_REP_RCVD: | |
1232 | case IB_CM_MRA_REP_SENT: | |
1233 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1234 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1235 | break; | |
1236 | default: | |
1237 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1238 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1239 | break; | |
1240 | } | |
1241 | ||
97f52eb4 | 1242 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1243 | if (ari && ari_length) { |
1244 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1245 | memcpy(rej_msg->ari, ari, ari_length); | |
1246 | } | |
1247 | ||
1248 | if (private_data && private_data_len) | |
1249 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1250 | } | |
1251 | ||
1252 | static void cm_dup_req_handler(struct cm_work *work, | |
1253 | struct cm_id_private *cm_id_priv) | |
1254 | { | |
1255 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1256 | unsigned long flags; |
1257 | int ret; | |
1258 | ||
1259 | /* Quick state check to discard duplicate REQs. */ | |
1260 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1261 | return; | |
1262 | ||
1263 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1264 | if (ret) | |
1265 | return; | |
1266 | ||
1267 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1268 | switch (cm_id_priv->id.state) { | |
1269 | case IB_CM_MRA_REQ_SENT: | |
1270 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1271 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1272 | cm_id_priv->private_data, | |
1273 | cm_id_priv->private_data_len); | |
1274 | break; | |
1275 | case IB_CM_TIMEWAIT: | |
1276 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1277 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1278 | break; | |
1279 | default: | |
1280 | goto unlock; | |
1281 | } | |
1282 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1283 | ||
34816ad9 | 1284 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1285 | if (ret) |
1286 | goto free; | |
1287 | return; | |
1288 | ||
1289 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1290 | free: cm_free_msg(msg); | |
1291 | } | |
1292 | ||
1293 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1294 | struct cm_id_private *cm_id_priv) | |
1295 | { | |
1296 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1297 | struct cm_timewait_info *timewait_info; | |
1298 | struct cm_req_msg *req_msg; | |
1299 | unsigned long flags; | |
1300 | ||
1301 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1302 | ||
1303 | /* Check for duplicate REQ and stale connections. */ | |
1304 | spin_lock_irqsave(&cm.lock, flags); | |
1305 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); | |
1306 | if (!timewait_info) | |
1307 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1308 | ||
1309 | if (timewait_info) { | |
1310 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1311 | timewait_info->work.remote_id); | |
8575329d | 1312 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
a977049d HR |
1313 | spin_unlock_irqrestore(&cm.lock, flags); |
1314 | if (cur_cm_id_priv) { | |
1315 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1316 | cm_deref_id(cur_cm_id_priv); | |
1317 | } else | |
1318 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1319 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1320 | NULL, 0); | |
8575329d SH |
1321 | listen_cm_id_priv = NULL; |
1322 | goto out; | |
a977049d HR |
1323 | } |
1324 | ||
1325 | /* Find matching listen request. */ | |
07d357d0 | 1326 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1327 | req_msg->service_id, |
1328 | req_msg->private_data); | |
a977049d | 1329 | if (!listen_cm_id_priv) { |
8575329d | 1330 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
a977049d HR |
1331 | spin_unlock_irqrestore(&cm.lock, flags); |
1332 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1333 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1334 | NULL, 0); | |
8575329d | 1335 | goto out; |
a977049d HR |
1336 | } |
1337 | atomic_inc(&listen_cm_id_priv->refcount); | |
1338 | atomic_inc(&cm_id_priv->refcount); | |
1339 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1340 | atomic_inc(&cm_id_priv->work_count); | |
1341 | spin_unlock_irqrestore(&cm.lock, flags); | |
8575329d | 1342 | out: |
a977049d | 1343 | return listen_cm_id_priv; |
a977049d HR |
1344 | } |
1345 | ||
1346 | static int cm_req_handler(struct cm_work *work) | |
1347 | { | |
1348 | struct ib_cm_id *cm_id; | |
1349 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1350 | struct cm_req_msg *req_msg; | |
1351 | int ret; | |
1352 | ||
1353 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1354 | ||
07d357d0 | 1355 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
1356 | if (IS_ERR(cm_id)) |
1357 | return PTR_ERR(cm_id); | |
1358 | ||
1359 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1360 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1361 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1362 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1363 | &cm_id_priv->av); |
1364 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1365 | id.local_id); | |
1366 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1367 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1368 | goto destroy; |
a977049d HR |
1369 | } |
1370 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1371 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1372 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1373 | ||
1374 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1375 | if (!listen_cm_id_priv) { | |
1376 | ret = -EINVAL; | |
76842405 SH |
1377 | kfree(cm_id_priv->timewait_info); |
1378 | goto destroy; | |
a977049d HR |
1379 | } |
1380 | ||
1381 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1382 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1383 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1384 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1385 | |
1386 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); | |
1387 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
76842405 SH |
1388 | if (ret) { |
1389 | ib_get_cached_gid(work->port->cm_dev->device, | |
1390 | work->port->port_num, 0, &work->path[0].sgid); | |
1391 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1392 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1393 | NULL, 0); | |
1394 | goto rejected; | |
1395 | } | |
a977049d HR |
1396 | if (req_msg->alt_local_lid) { |
1397 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1398 | if (ret) { |
1399 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1400 | &work->path[0].sgid, | |
1401 | sizeof work->path[0].sgid, NULL, 0); | |
1402 | goto rejected; | |
1403 | } | |
a977049d HR |
1404 | } |
1405 | cm_id_priv->tid = req_msg->hdr.tid; | |
1406 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1407 | cm_req_get_local_resp_timeout(req_msg)); | |
1408 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1409 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1410 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1411 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1412 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
1413 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); | |
1414 | cm_id_priv->local_ack_timeout = | |
1415 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1416 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); | |
1417 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1418 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1419 | |
1420 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1421 | cm_process_work(cm_id_priv, work); | |
1422 | cm_deref_id(listen_cm_id_priv); | |
1423 | return 0; | |
1424 | ||
76842405 SH |
1425 | rejected: |
1426 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1427 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1428 | destroy: |
1429 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1430 | return ret; |
1431 | } | |
1432 | ||
1433 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1434 | struct cm_id_private *cm_id_priv, | |
1435 | struct ib_cm_rep_param *param) | |
1436 | { | |
1437 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1438 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1439 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1440 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1441 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1442 | rep_msg->resp_resources = param->responder_resources; | |
1443 | rep_msg->initiator_depth = param->initiator_depth; | |
1444 | cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); | |
1445 | cm_rep_set_failover(rep_msg, param->failover_accepted); | |
1446 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1447 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1448 | cm_rep_set_srq(rep_msg, param->srq); | |
1449 | rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
1450 | ||
1451 | if (param->private_data && param->private_data_len) | |
1452 | memcpy(rep_msg->private_data, param->private_data, | |
1453 | param->private_data_len); | |
1454 | } | |
1455 | ||
1456 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1457 | struct ib_cm_rep_param *param) | |
1458 | { | |
1459 | struct cm_id_private *cm_id_priv; | |
1460 | struct ib_mad_send_buf *msg; | |
1461 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1462 | unsigned long flags; |
1463 | int ret; | |
1464 | ||
1465 | if (param->private_data && | |
1466 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1467 | return -EINVAL; | |
1468 | ||
1469 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1470 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1471 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1472 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1473 | ret = -EINVAL; | |
1474 | goto out; | |
1475 | } | |
1476 | ||
1477 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1478 | if (ret) | |
1479 | goto out; | |
1480 | ||
1481 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1482 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1483 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1484 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1485 | ||
34816ad9 | 1486 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1487 | if (ret) { |
1488 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1489 | cm_free_msg(msg); | |
1490 | return ret; | |
1491 | } | |
1492 | ||
1493 | cm_id->state = IB_CM_REP_SENT; | |
1494 | cm_id_priv->msg = msg; | |
1495 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1496 | cm_id_priv->responder_resources = param->responder_resources; | |
1497 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1498 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1499 | ||
1500 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1501 | return ret; | |
1502 | } | |
1503 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1504 | ||
1505 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1506 | struct cm_id_private *cm_id_priv, | |
1507 | const void *private_data, | |
1508 | u8 private_data_len) | |
1509 | { | |
1510 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1511 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1512 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1513 | ||
1514 | if (private_data && private_data_len) | |
1515 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1516 | } | |
1517 | ||
1518 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1519 | const void *private_data, | |
1520 | u8 private_data_len) | |
1521 | { | |
1522 | struct cm_id_private *cm_id_priv; | |
1523 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1524 | unsigned long flags; |
1525 | void *data; | |
1526 | int ret; | |
1527 | ||
1528 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1529 | return -EINVAL; | |
1530 | ||
1531 | data = cm_copy_private_data(private_data, private_data_len); | |
1532 | if (IS_ERR(data)) | |
1533 | return PTR_ERR(data); | |
1534 | ||
1535 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1536 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1537 | if (cm_id->state != IB_CM_REP_RCVD && | |
1538 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1539 | ret = -EINVAL; | |
1540 | goto error; | |
1541 | } | |
1542 | ||
1543 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1544 | if (ret) | |
1545 | goto error; | |
1546 | ||
1547 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1548 | private_data, private_data_len); | |
1549 | ||
34816ad9 | 1550 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1551 | if (ret) { |
1552 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1553 | cm_free_msg(msg); | |
1554 | kfree(data); | |
1555 | return ret; | |
1556 | } | |
1557 | ||
1558 | cm_id->state = IB_CM_ESTABLISHED; | |
1559 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1560 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1561 | return 0; | |
1562 | ||
1563 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1564 | kfree(data); | |
1565 | return ret; | |
1566 | } | |
1567 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1568 | ||
1569 | static void cm_format_rep_event(struct cm_work *work) | |
1570 | { | |
1571 | struct cm_rep_msg *rep_msg; | |
1572 | struct ib_cm_rep_event_param *param; | |
1573 | ||
1574 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1575 | param = &work->cm_event.param.rep_rcvd; | |
1576 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1577 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1578 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1579 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1580 | param->responder_resources = rep_msg->initiator_depth; | |
1581 | param->initiator_depth = rep_msg->resp_resources; | |
1582 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1583 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1584 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1585 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1586 | param->srq = cm_rep_get_srq(rep_msg); | |
1587 | work->cm_event.private_data = &rep_msg->private_data; | |
1588 | } | |
1589 | ||
1590 | static void cm_dup_rep_handler(struct cm_work *work) | |
1591 | { | |
1592 | struct cm_id_private *cm_id_priv; | |
1593 | struct cm_rep_msg *rep_msg; | |
1594 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1595 | unsigned long flags; |
1596 | int ret; | |
1597 | ||
1598 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1599 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1600 | rep_msg->local_comm_id); | |
1601 | if (!cm_id_priv) | |
1602 | return; | |
1603 | ||
1604 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1605 | if (ret) | |
1606 | goto deref; | |
1607 | ||
1608 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1609 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) | |
1610 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1611 | cm_id_priv->private_data, | |
1612 | cm_id_priv->private_data_len); | |
1613 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1614 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1615 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1616 | cm_id_priv->private_data, | |
1617 | cm_id_priv->private_data_len); | |
1618 | else | |
1619 | goto unlock; | |
1620 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1621 | ||
34816ad9 | 1622 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1623 | if (ret) |
1624 | goto free; | |
1625 | goto deref; | |
1626 | ||
1627 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1628 | free: cm_free_msg(msg); | |
1629 | deref: cm_deref_id(cm_id_priv); | |
1630 | } | |
1631 | ||
1632 | static int cm_rep_handler(struct cm_work *work) | |
1633 | { | |
1634 | struct cm_id_private *cm_id_priv; | |
1635 | struct cm_rep_msg *rep_msg; | |
1636 | unsigned long flags; | |
1637 | int ret; | |
1638 | ||
1639 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1640 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1641 | if (!cm_id_priv) { | |
1642 | cm_dup_rep_handler(work); | |
1643 | return -EINVAL; | |
1644 | } | |
1645 | ||
87fd1a11 SH |
1646 | cm_format_rep_event(work); |
1647 | ||
1648 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1649 | switch (cm_id_priv->id.state) { | |
1650 | case IB_CM_REQ_SENT: | |
1651 | case IB_CM_MRA_REQ_RCVD: | |
1652 | break; | |
1653 | default: | |
1654 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1655 | ret = -EINVAL; | |
1656 | goto error; | |
1657 | } | |
1658 | ||
a977049d HR |
1659 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1660 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1661 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1662 | ||
87fd1a11 | 1663 | spin_lock(&cm.lock); |
a977049d HR |
1664 | /* Check for duplicate REP. */ |
1665 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1666 | spin_unlock(&cm.lock); |
1667 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1668 | ret = -EINVAL; |
1669 | goto error; | |
1670 | } | |
1671 | /* Check for a stale connection. */ | |
1672 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1673 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1674 | &cm.remote_id_table); | |
1675 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1676 | spin_unlock(&cm.lock); | |
1677 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1678 | cm_issue_rej(work->port, work->mad_recv_wc, |
1679 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1680 | NULL, 0); | |
1681 | ret = -EINVAL; | |
1682 | goto error; | |
1683 | } | |
87fd1a11 | 1684 | spin_unlock(&cm.lock); |
a977049d | 1685 | |
a977049d HR |
1686 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1687 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1688 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1689 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1690 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1691 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1692 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1693 | ||
1694 | /* todo: handle peer_to_peer */ | |
1695 | ||
34816ad9 | 1696 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1697 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1698 | if (!ret) | |
1699 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1700 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1701 | ||
1702 | if (ret) | |
1703 | cm_process_work(cm_id_priv, work); | |
1704 | else | |
1705 | cm_deref_id(cm_id_priv); | |
1706 | return 0; | |
1707 | ||
87fd1a11 | 1708 | error: |
a977049d HR |
1709 | cm_deref_id(cm_id_priv); |
1710 | return ret; | |
1711 | } | |
1712 | ||
1713 | static int cm_establish_handler(struct cm_work *work) | |
1714 | { | |
1715 | struct cm_id_private *cm_id_priv; | |
1716 | unsigned long flags; | |
1717 | int ret; | |
1718 | ||
1719 | /* See comment in ib_cm_establish about lookup. */ | |
1720 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); | |
1721 | if (!cm_id_priv) | |
1722 | return -EINVAL; | |
1723 | ||
1724 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1725 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { | |
1726 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1727 | goto out; | |
1728 | } | |
1729 | ||
34816ad9 | 1730 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1731 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1732 | if (!ret) | |
1733 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1734 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1735 | ||
1736 | if (ret) | |
1737 | cm_process_work(cm_id_priv, work); | |
1738 | else | |
1739 | cm_deref_id(cm_id_priv); | |
1740 | return 0; | |
1741 | out: | |
1742 | cm_deref_id(cm_id_priv); | |
1743 | return -EINVAL; | |
1744 | } | |
1745 | ||
1746 | static int cm_rtu_handler(struct cm_work *work) | |
1747 | { | |
1748 | struct cm_id_private *cm_id_priv; | |
1749 | struct cm_rtu_msg *rtu_msg; | |
1750 | unsigned long flags; | |
1751 | int ret; | |
1752 | ||
1753 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1754 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1755 | rtu_msg->local_comm_id); | |
1756 | if (!cm_id_priv) | |
1757 | return -EINVAL; | |
1758 | ||
1759 | work->cm_event.private_data = &rtu_msg->private_data; | |
1760 | ||
1761 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1762 | if (cm_id_priv->id.state != IB_CM_REP_SENT && | |
1763 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
1764 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1765 | goto out; | |
1766 | } | |
1767 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1768 | ||
34816ad9 | 1769 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1770 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1771 | if (!ret) | |
1772 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1773 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1774 | ||
1775 | if (ret) | |
1776 | cm_process_work(cm_id_priv, work); | |
1777 | else | |
1778 | cm_deref_id(cm_id_priv); | |
1779 | return 0; | |
1780 | out: | |
1781 | cm_deref_id(cm_id_priv); | |
1782 | return -EINVAL; | |
1783 | } | |
1784 | ||
1785 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1786 | struct cm_id_private *cm_id_priv, | |
1787 | const void *private_data, | |
1788 | u8 private_data_len) | |
1789 | { | |
1790 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1791 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1792 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1793 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1794 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1795 | ||
1796 | if (private_data && private_data_len) | |
1797 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1798 | } | |
1799 | ||
1800 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1801 | const void *private_data, | |
1802 | u8 private_data_len) | |
1803 | { | |
1804 | struct cm_id_private *cm_id_priv; | |
1805 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1806 | unsigned long flags; |
1807 | int ret; | |
1808 | ||
1809 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1810 | return -EINVAL; | |
1811 | ||
1812 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1813 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1814 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1815 | ret = -EINVAL; | |
1816 | goto out; | |
1817 | } | |
1818 | ||
1819 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1820 | if (ret) { | |
1821 | cm_enter_timewait(cm_id_priv); | |
1822 | goto out; | |
1823 | } | |
1824 | ||
1825 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1826 | private_data, private_data_len); | |
34816ad9 | 1827 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1828 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
1829 | ||
34816ad9 | 1830 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1831 | if (ret) { |
1832 | cm_enter_timewait(cm_id_priv); | |
1833 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1834 | cm_free_msg(msg); | |
1835 | return ret; | |
1836 | } | |
1837 | ||
1838 | cm_id->state = IB_CM_DREQ_SENT; | |
1839 | cm_id_priv->msg = msg; | |
1840 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1841 | return ret; | |
1842 | } | |
1843 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1844 | ||
1845 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1846 | struct cm_id_private *cm_id_priv, | |
1847 | const void *private_data, | |
1848 | u8 private_data_len) | |
1849 | { | |
1850 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1851 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1852 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1853 | ||
1854 | if (private_data && private_data_len) | |
1855 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
1856 | } | |
1857 | ||
1858 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
1859 | const void *private_data, | |
1860 | u8 private_data_len) | |
1861 | { | |
1862 | struct cm_id_private *cm_id_priv; | |
1863 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1864 | unsigned long flags; |
1865 | void *data; | |
1866 | int ret; | |
1867 | ||
1868 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
1869 | return -EINVAL; | |
1870 | ||
1871 | data = cm_copy_private_data(private_data, private_data_len); | |
1872 | if (IS_ERR(data)) | |
1873 | return PTR_ERR(data); | |
1874 | ||
1875 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1876 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1877 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
1878 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1879 | kfree(data); | |
1880 | return -EINVAL; | |
1881 | } | |
1882 | ||
1883 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1884 | cm_enter_timewait(cm_id_priv); | |
1885 | ||
1886 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1887 | if (ret) | |
1888 | goto out; | |
1889 | ||
1890 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1891 | private_data, private_data_len); | |
1892 | ||
34816ad9 | 1893 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1894 | if (ret) { |
1895 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1896 | cm_free_msg(msg); | |
1897 | return ret; | |
1898 | } | |
1899 | ||
1900 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1901 | return ret; | |
1902 | } | |
1903 | EXPORT_SYMBOL(ib_send_cm_drep); | |
1904 | ||
82a9c16a SH |
1905 | static int cm_issue_drep(struct cm_port *port, |
1906 | struct ib_mad_recv_wc *mad_recv_wc) | |
1907 | { | |
1908 | struct ib_mad_send_buf *msg = NULL; | |
1909 | struct cm_dreq_msg *dreq_msg; | |
1910 | struct cm_drep_msg *drep_msg; | |
1911 | int ret; | |
1912 | ||
1913 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1914 | if (ret) | |
1915 | return ret; | |
1916 | ||
1917 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
1918 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
1919 | ||
1920 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
1921 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
1922 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
1923 | ||
1924 | ret = ib_post_send_mad(msg, NULL); | |
1925 | if (ret) | |
1926 | cm_free_msg(msg); | |
1927 | ||
1928 | return ret; | |
1929 | } | |
1930 | ||
a977049d HR |
1931 | static int cm_dreq_handler(struct cm_work *work) |
1932 | { | |
1933 | struct cm_id_private *cm_id_priv; | |
1934 | struct cm_dreq_msg *dreq_msg; | |
1935 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1936 | unsigned long flags; |
1937 | int ret; | |
1938 | ||
1939 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
1940 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
1941 | dreq_msg->local_comm_id); | |
82a9c16a SH |
1942 | if (!cm_id_priv) { |
1943 | cm_issue_drep(work->port, work->mad_recv_wc); | |
a977049d | 1944 | return -EINVAL; |
82a9c16a | 1945 | } |
a977049d HR |
1946 | |
1947 | work->cm_event.private_data = &dreq_msg->private_data; | |
1948 | ||
1949 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1950 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) | |
1951 | goto unlock; | |
1952 | ||
1953 | switch (cm_id_priv->id.state) { | |
1954 | case IB_CM_REP_SENT: | |
1955 | case IB_CM_DREQ_SENT: | |
34816ad9 | 1956 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1957 | break; |
1958 | case IB_CM_ESTABLISHED: | |
1959 | case IB_CM_MRA_REP_RCVD: | |
1960 | break; | |
1961 | case IB_CM_TIMEWAIT: | |
1962 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
1963 | goto unlock; | |
1964 | ||
1965 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1966 | cm_id_priv->private_data, | |
1967 | cm_id_priv->private_data_len); | |
1968 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1969 | ||
34816ad9 | 1970 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
1971 | cm_free_msg(msg); |
1972 | goto deref; | |
1973 | default: | |
1974 | goto unlock; | |
1975 | } | |
1976 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
1977 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
1978 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1979 | if (!ret) | |
1980 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1981 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1982 | ||
1983 | if (ret) | |
1984 | cm_process_work(cm_id_priv, work); | |
1985 | else | |
1986 | cm_deref_id(cm_id_priv); | |
1987 | return 0; | |
1988 | ||
1989 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1990 | deref: cm_deref_id(cm_id_priv); | |
1991 | return -EINVAL; | |
1992 | } | |
1993 | ||
1994 | static int cm_drep_handler(struct cm_work *work) | |
1995 | { | |
1996 | struct cm_id_private *cm_id_priv; | |
1997 | struct cm_drep_msg *drep_msg; | |
1998 | unsigned long flags; | |
1999 | int ret; | |
2000 | ||
2001 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2002 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2003 | drep_msg->local_comm_id); | |
2004 | if (!cm_id_priv) | |
2005 | return -EINVAL; | |
2006 | ||
2007 | work->cm_event.private_data = &drep_msg->private_data; | |
2008 | ||
2009 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2010 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && | |
2011 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
2012 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2013 | goto out; | |
2014 | } | |
2015 | cm_enter_timewait(cm_id_priv); | |
2016 | ||
34816ad9 | 2017 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2018 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2019 | if (!ret) | |
2020 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2021 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2022 | ||
2023 | if (ret) | |
2024 | cm_process_work(cm_id_priv, work); | |
2025 | else | |
2026 | cm_deref_id(cm_id_priv); | |
2027 | return 0; | |
2028 | out: | |
2029 | cm_deref_id(cm_id_priv); | |
2030 | return -EINVAL; | |
2031 | } | |
2032 | ||
2033 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2034 | enum ib_cm_rej_reason reason, | |
2035 | void *ari, | |
2036 | u8 ari_length, | |
2037 | const void *private_data, | |
2038 | u8 private_data_len) | |
2039 | { | |
2040 | struct cm_id_private *cm_id_priv; | |
2041 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2042 | unsigned long flags; |
2043 | int ret; | |
2044 | ||
2045 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2046 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2047 | return -EINVAL; | |
2048 | ||
2049 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2050 | ||
2051 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2052 | switch (cm_id->state) { | |
2053 | case IB_CM_REQ_SENT: | |
2054 | case IB_CM_MRA_REQ_RCVD: | |
2055 | case IB_CM_REQ_RCVD: | |
2056 | case IB_CM_MRA_REQ_SENT: | |
2057 | case IB_CM_REP_RCVD: | |
2058 | case IB_CM_MRA_REP_SENT: | |
2059 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2060 | if (!ret) | |
2061 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2062 | cm_id_priv, reason, ari, ari_length, | |
2063 | private_data, private_data_len); | |
2064 | ||
2065 | cm_reset_to_idle(cm_id_priv); | |
2066 | break; | |
2067 | case IB_CM_REP_SENT: | |
2068 | case IB_CM_MRA_REP_RCVD: | |
2069 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2070 | if (!ret) | |
2071 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2072 | cm_id_priv, reason, ari, ari_length, | |
2073 | private_data, private_data_len); | |
2074 | ||
2075 | cm_enter_timewait(cm_id_priv); | |
2076 | break; | |
2077 | default: | |
2078 | ret = -EINVAL; | |
2079 | goto out; | |
2080 | } | |
2081 | ||
2082 | if (ret) | |
2083 | goto out; | |
2084 | ||
34816ad9 | 2085 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2086 | if (ret) |
2087 | cm_free_msg(msg); | |
2088 | ||
2089 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2090 | return ret; | |
2091 | } | |
2092 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2093 | ||
2094 | static void cm_format_rej_event(struct cm_work *work) | |
2095 | { | |
2096 | struct cm_rej_msg *rej_msg; | |
2097 | struct ib_cm_rej_event_param *param; | |
2098 | ||
2099 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2100 | param = &work->cm_event.param.rej_rcvd; | |
2101 | param->ari = rej_msg->ari; | |
2102 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2103 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2104 | work->cm_event.private_data = &rej_msg->private_data; |
2105 | } | |
2106 | ||
2107 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2108 | { | |
2109 | struct cm_timewait_info *timewait_info; | |
2110 | struct cm_id_private *cm_id_priv; | |
2111 | unsigned long flags; | |
97f52eb4 | 2112 | __be32 remote_id; |
a977049d HR |
2113 | |
2114 | remote_id = rej_msg->local_comm_id; | |
2115 | ||
97f52eb4 | 2116 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
a977049d | 2117 | spin_lock_irqsave(&cm.lock, flags); |
97f52eb4 | 2118 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2119 | remote_id); |
2120 | if (!timewait_info) { | |
2121 | spin_unlock_irqrestore(&cm.lock, flags); | |
2122 | return NULL; | |
2123 | } | |
f06d2653 SH |
2124 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2125 | (timewait_info->work.local_id ^ | |
2126 | cm.random_id_operand)); | |
a977049d HR |
2127 | if (cm_id_priv) { |
2128 | if (cm_id_priv->id.remote_id == remote_id) | |
2129 | atomic_inc(&cm_id_priv->refcount); | |
2130 | else | |
2131 | cm_id_priv = NULL; | |
2132 | } | |
2133 | spin_unlock_irqrestore(&cm.lock, flags); | |
2134 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) | |
2135 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2136 | else | |
2137 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2138 | ||
2139 | return cm_id_priv; | |
2140 | } | |
2141 | ||
2142 | static int cm_rej_handler(struct cm_work *work) | |
2143 | { | |
2144 | struct cm_id_private *cm_id_priv; | |
2145 | struct cm_rej_msg *rej_msg; | |
2146 | unsigned long flags; | |
2147 | int ret; | |
2148 | ||
2149 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2150 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2151 | if (!cm_id_priv) | |
2152 | return -EINVAL; | |
2153 | ||
2154 | cm_format_rej_event(work); | |
2155 | ||
2156 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2157 | switch (cm_id_priv->id.state) { | |
2158 | case IB_CM_REQ_SENT: | |
2159 | case IB_CM_MRA_REQ_RCVD: | |
2160 | case IB_CM_REP_SENT: | |
2161 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2162 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2163 | /* fall through */ |
2164 | case IB_CM_REQ_RCVD: | |
2165 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2166 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2167 | cm_enter_timewait(cm_id_priv); |
2168 | else | |
2169 | cm_reset_to_idle(cm_id_priv); | |
2170 | break; | |
2171 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2172 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2173 | /* fall through */ |
2174 | case IB_CM_REP_RCVD: | |
2175 | case IB_CM_MRA_REP_SENT: | |
2176 | case IB_CM_ESTABLISHED: | |
2177 | cm_enter_timewait(cm_id_priv); | |
2178 | break; | |
2179 | default: | |
2180 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2181 | ret = -EINVAL; | |
2182 | goto out; | |
2183 | } | |
2184 | ||
2185 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2186 | if (!ret) | |
2187 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2188 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2189 | ||
2190 | if (ret) | |
2191 | cm_process_work(cm_id_priv, work); | |
2192 | else | |
2193 | cm_deref_id(cm_id_priv); | |
2194 | return 0; | |
2195 | out: | |
2196 | cm_deref_id(cm_id_priv); | |
2197 | return -EINVAL; | |
2198 | } | |
2199 | ||
2200 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2201 | u8 service_timeout, | |
2202 | const void *private_data, | |
2203 | u8 private_data_len) | |
2204 | { | |
2205 | struct cm_id_private *cm_id_priv; | |
2206 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2207 | void *data; |
2208 | unsigned long flags; | |
2209 | int ret; | |
2210 | ||
2211 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2212 | return -EINVAL; | |
2213 | ||
2214 | data = cm_copy_private_data(private_data, private_data_len); | |
2215 | if (IS_ERR(data)) | |
2216 | return PTR_ERR(data); | |
2217 | ||
2218 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2219 | ||
2220 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2221 | switch(cm_id_priv->id.state) { | |
2222 | case IB_CM_REQ_RCVD: | |
2223 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2224 | if (ret) | |
2225 | goto error1; | |
2226 | ||
2227 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2228 | CM_MSG_RESPONSE_REQ, service_timeout, | |
2229 | private_data, private_data_len); | |
34816ad9 | 2230 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2231 | if (ret) |
2232 | goto error2; | |
2233 | cm_id->state = IB_CM_MRA_REQ_SENT; | |
2234 | break; | |
2235 | case IB_CM_REP_RCVD: | |
2236 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2237 | if (ret) | |
2238 | goto error1; | |
2239 | ||
2240 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2241 | CM_MSG_RESPONSE_REP, service_timeout, | |
2242 | private_data, private_data_len); | |
34816ad9 | 2243 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2244 | if (ret) |
2245 | goto error2; | |
2246 | cm_id->state = IB_CM_MRA_REP_SENT; | |
2247 | break; | |
2248 | case IB_CM_ESTABLISHED: | |
2249 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2250 | if (ret) | |
2251 | goto error1; | |
2252 | ||
2253 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2254 | CM_MSG_RESPONSE_OTHER, service_timeout, | |
2255 | private_data, private_data_len); | |
34816ad9 | 2256 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2257 | if (ret) |
2258 | goto error2; | |
2259 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; | |
2260 | break; | |
2261 | default: | |
2262 | ret = -EINVAL; | |
2263 | goto error1; | |
2264 | } | |
2265 | cm_id_priv->service_timeout = service_timeout; | |
2266 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2267 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2268 | return 0; | |
2269 | ||
2270 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2271 | kfree(data); | |
2272 | return ret; | |
2273 | ||
2274 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2275 | kfree(data); | |
2276 | cm_free_msg(msg); | |
2277 | return ret; | |
2278 | } | |
2279 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2280 | ||
2281 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2282 | { | |
2283 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2284 | case CM_MSG_RESPONSE_REQ: | |
2285 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2286 | case CM_MSG_RESPONSE_REP: | |
2287 | case CM_MSG_RESPONSE_OTHER: | |
2288 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2289 | mra_msg->local_comm_id); | |
2290 | default: | |
2291 | return NULL; | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | static int cm_mra_handler(struct cm_work *work) | |
2296 | { | |
2297 | struct cm_id_private *cm_id_priv; | |
2298 | struct cm_mra_msg *mra_msg; | |
2299 | unsigned long flags; | |
2300 | int timeout, ret; | |
2301 | ||
2302 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2303 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2304 | if (!cm_id_priv) | |
2305 | return -EINVAL; | |
2306 | ||
2307 | work->cm_event.private_data = &mra_msg->private_data; | |
2308 | work->cm_event.param.mra_rcvd.service_timeout = | |
2309 | cm_mra_get_service_timeout(mra_msg); | |
2310 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
2311 | cm_convert_to_ms(cm_id_priv->av.packet_life_time); | |
2312 | ||
2313 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2314 | switch (cm_id_priv->id.state) { | |
2315 | case IB_CM_REQ_SENT: | |
2316 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2317 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2318 | cm_id_priv->msg, timeout)) |
a977049d HR |
2319 | goto out; |
2320 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2321 | break; | |
2322 | case IB_CM_REP_SENT: | |
2323 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2324 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2325 | cm_id_priv->msg, timeout)) |
a977049d HR |
2326 | goto out; |
2327 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2328 | break; | |
2329 | case IB_CM_ESTABLISHED: | |
2330 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2331 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2332 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2333 | cm_id_priv->msg, timeout)) |
a977049d HR |
2334 | goto out; |
2335 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; | |
2336 | break; | |
2337 | default: | |
2338 | goto out; | |
2339 | } | |
2340 | ||
2341 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2342 | cm_id_priv->id.state; | |
2343 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2344 | if (!ret) | |
2345 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2346 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2347 | ||
2348 | if (ret) | |
2349 | cm_process_work(cm_id_priv, work); | |
2350 | else | |
2351 | cm_deref_id(cm_id_priv); | |
2352 | return 0; | |
2353 | out: | |
2354 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2355 | cm_deref_id(cm_id_priv); | |
2356 | return -EINVAL; | |
2357 | } | |
2358 | ||
2359 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2360 | struct cm_id_private *cm_id_priv, | |
2361 | struct ib_sa_path_rec *alternate_path, | |
2362 | const void *private_data, | |
2363 | u8 private_data_len) | |
2364 | { | |
2365 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2366 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2367 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2368 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2369 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2370 | /* todo: need remote CM response timeout */ | |
2371 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2372 | lap_msg->alt_local_lid = alternate_path->slid; | |
2373 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2374 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2375 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2376 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2377 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2378 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2379 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2380 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2381 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2382 | cm_lap_set_local_ack_timeout(lap_msg, | |
2383 | min(31, alternate_path->packet_life_time + 1)); | |
2384 | ||
2385 | if (private_data && private_data_len) | |
2386 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2387 | } | |
2388 | ||
2389 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2390 | struct ib_sa_path_rec *alternate_path, | |
2391 | const void *private_data, | |
2392 | u8 private_data_len) | |
2393 | { | |
2394 | struct cm_id_private *cm_id_priv; | |
2395 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2396 | unsigned long flags; |
2397 | int ret; | |
2398 | ||
2399 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2400 | return -EINVAL; | |
2401 | ||
2402 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2403 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2404 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2405 | cm_id->lap_state != IB_CM_LAP_IDLE) { | |
2406 | ret = -EINVAL; | |
2407 | goto out; | |
2408 | } | |
2409 | ||
2410 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2411 | if (ret) | |
2412 | goto out; | |
2413 | ||
2414 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2415 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2416 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2417 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2418 | ||
34816ad9 | 2419 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2420 | if (ret) { |
2421 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2422 | cm_free_msg(msg); | |
2423 | return ret; | |
2424 | } | |
2425 | ||
2426 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2427 | cm_id_priv->msg = msg; | |
2428 | ||
2429 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2430 | return ret; | |
2431 | } | |
2432 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2433 | ||
2434 | static void cm_format_path_from_lap(struct ib_sa_path_rec *path, | |
2435 | struct cm_lap_msg *lap_msg) | |
2436 | { | |
2437 | memset(path, 0, sizeof *path); | |
2438 | path->dgid = lap_msg->alt_local_gid; | |
2439 | path->sgid = lap_msg->alt_remote_gid; | |
2440 | path->dlid = lap_msg->alt_local_lid; | |
2441 | path->slid = lap_msg->alt_remote_lid; | |
2442 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2443 | path->hop_limit = lap_msg->alt_hop_limit; | |
2444 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2445 | path->reversible = 1; | |
2446 | /* pkey is same as in REQ */ | |
2447 | path->sl = cm_lap_get_sl(lap_msg); | |
2448 | path->mtu_selector = IB_SA_EQ; | |
2449 | /* mtu is same as in REQ */ | |
2450 | path->rate_selector = IB_SA_EQ; | |
2451 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2452 | path->packet_life_time_selector = IB_SA_EQ; | |
2453 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2454 | path->packet_life_time -= (path->packet_life_time > 0); | |
2455 | } | |
2456 | ||
2457 | static int cm_lap_handler(struct cm_work *work) | |
2458 | { | |
2459 | struct cm_id_private *cm_id_priv; | |
2460 | struct cm_lap_msg *lap_msg; | |
2461 | struct ib_cm_lap_event_param *param; | |
2462 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2463 | unsigned long flags; |
2464 | int ret; | |
2465 | ||
2466 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2467 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2468 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2469 | lap_msg->local_comm_id); | |
2470 | if (!cm_id_priv) | |
2471 | return -EINVAL; | |
2472 | ||
2473 | param = &work->cm_event.param.lap_rcvd; | |
2474 | param->alternate_path = &work->path[0]; | |
2475 | cm_format_path_from_lap(param->alternate_path, lap_msg); | |
2476 | work->cm_event.private_data = &lap_msg->private_data; | |
2477 | ||
2478 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2479 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) | |
2480 | goto unlock; | |
2481 | ||
2482 | switch (cm_id_priv->id.lap_state) { | |
2483 | case IB_CM_LAP_IDLE: | |
2484 | break; | |
2485 | case IB_CM_MRA_LAP_SENT: | |
2486 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
2487 | goto unlock; | |
2488 | ||
2489 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2490 | CM_MSG_RESPONSE_OTHER, | |
2491 | cm_id_priv->service_timeout, | |
2492 | cm_id_priv->private_data, | |
2493 | cm_id_priv->private_data_len); | |
2494 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2495 | ||
34816ad9 | 2496 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2497 | cm_free_msg(msg); |
2498 | goto deref; | |
2499 | default: | |
2500 | goto unlock; | |
2501 | } | |
2502 | ||
2503 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2504 | cm_id_priv->tid = lap_msg->hdr.tid; | |
2505 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2506 | if (!ret) | |
2507 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2508 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2509 | ||
2510 | if (ret) | |
2511 | cm_process_work(cm_id_priv, work); | |
2512 | else | |
2513 | cm_deref_id(cm_id_priv); | |
2514 | return 0; | |
2515 | ||
2516 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2517 | deref: cm_deref_id(cm_id_priv); | |
2518 | return -EINVAL; | |
2519 | } | |
2520 | ||
2521 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2522 | struct cm_id_private *cm_id_priv, | |
2523 | enum ib_cm_apr_status status, | |
2524 | void *info, | |
2525 | u8 info_length, | |
2526 | const void *private_data, | |
2527 | u8 private_data_len) | |
2528 | { | |
2529 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2530 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2531 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2532 | apr_msg->ap_status = (u8) status; | |
2533 | ||
2534 | if (info && info_length) { | |
2535 | apr_msg->info_length = info_length; | |
2536 | memcpy(apr_msg->info, info, info_length); | |
2537 | } | |
2538 | ||
2539 | if (private_data && private_data_len) | |
2540 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2541 | } | |
2542 | ||
2543 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2544 | enum ib_cm_apr_status status, | |
2545 | void *info, | |
2546 | u8 info_length, | |
2547 | const void *private_data, | |
2548 | u8 private_data_len) | |
2549 | { | |
2550 | struct cm_id_private *cm_id_priv; | |
2551 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2552 | unsigned long flags; |
2553 | int ret; | |
2554 | ||
2555 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2556 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2557 | return -EINVAL; | |
2558 | ||
2559 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2560 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2561 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2562 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2563 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2564 | ret = -EINVAL; | |
2565 | goto out; | |
2566 | } | |
2567 | ||
2568 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2569 | if (ret) | |
2570 | goto out; | |
2571 | ||
2572 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2573 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2574 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2575 | if (ret) { |
2576 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2577 | cm_free_msg(msg); | |
2578 | return ret; | |
2579 | } | |
2580 | ||
2581 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2582 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2583 | return ret; | |
2584 | } | |
2585 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2586 | ||
2587 | static int cm_apr_handler(struct cm_work *work) | |
2588 | { | |
2589 | struct cm_id_private *cm_id_priv; | |
2590 | struct cm_apr_msg *apr_msg; | |
2591 | unsigned long flags; | |
2592 | int ret; | |
2593 | ||
2594 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2595 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2596 | apr_msg->local_comm_id); | |
2597 | if (!cm_id_priv) | |
2598 | return -EINVAL; /* Unmatched reply. */ | |
2599 | ||
2600 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2601 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2602 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2603 | work->cm_event.private_data = &apr_msg->private_data; | |
2604 | ||
2605 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2606 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || | |
2607 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2608 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
2609 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2610 | goto out; | |
2611 | } | |
2612 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2613 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2614 | cm_id_priv->msg = NULL; |
2615 | ||
2616 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2617 | if (!ret) | |
2618 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2619 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2620 | ||
2621 | if (ret) | |
2622 | cm_process_work(cm_id_priv, work); | |
2623 | else | |
2624 | cm_deref_id(cm_id_priv); | |
2625 | return 0; | |
2626 | out: | |
2627 | cm_deref_id(cm_id_priv); | |
2628 | return -EINVAL; | |
2629 | } | |
2630 | ||
2631 | static int cm_timewait_handler(struct cm_work *work) | |
2632 | { | |
2633 | struct cm_timewait_info *timewait_info; | |
2634 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2635 | int ret; |
2636 | ||
2637 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2638 | spin_lock_irq(&cm.lock); |
2639 | list_del(&timewait_info->list); | |
2640 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2641 | |
2642 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2643 | timewait_info->work.remote_id); | |
2644 | if (!cm_id_priv) | |
2645 | return -EINVAL; | |
2646 | ||
8575329d | 2647 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2648 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2649 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2650 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2651 | goto out; |
2652 | } | |
2653 | cm_id_priv->id.state = IB_CM_IDLE; | |
2654 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2655 | if (!ret) | |
2656 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2657 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2658 | |
2659 | if (ret) | |
2660 | cm_process_work(cm_id_priv, work); | |
2661 | else | |
2662 | cm_deref_id(cm_id_priv); | |
2663 | return 0; | |
2664 | out: | |
2665 | cm_deref_id(cm_id_priv); | |
2666 | return -EINVAL; | |
2667 | } | |
2668 | ||
2669 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2670 | struct cm_id_private *cm_id_priv, | |
2671 | struct ib_cm_sidr_req_param *param) | |
2672 | { | |
2673 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2674 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2675 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
75af9088 | 2676 | sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
a977049d HR |
2677 | sidr_req_msg->service_id = param->service_id; |
2678 | ||
2679 | if (param->private_data && param->private_data_len) | |
2680 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2681 | param->private_data_len); | |
2682 | } | |
2683 | ||
2684 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2685 | struct ib_cm_sidr_req_param *param) | |
2686 | { | |
2687 | struct cm_id_private *cm_id_priv; | |
2688 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2689 | unsigned long flags; |
2690 | int ret; | |
2691 | ||
2692 | if (!param->path || (param->private_data && | |
2693 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2694 | return -EINVAL; | |
2695 | ||
2696 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2697 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2698 | if (ret) | |
2699 | goto out; | |
2700 | ||
2701 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2702 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2703 | cm_id_priv->timeout_ms = param->timeout_ms; |
2704 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2705 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2706 | if (ret) | |
2707 | goto out; | |
2708 | ||
2709 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2710 | param); | |
34816ad9 | 2711 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2712 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2713 | ||
2714 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2715 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2716 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2717 | else |
2718 | ret = -EINVAL; | |
2719 | ||
2720 | if (ret) { | |
2721 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2722 | cm_free_msg(msg); | |
2723 | goto out; | |
2724 | } | |
2725 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2726 | cm_id_priv->msg = msg; | |
2727 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2728 | out: | |
2729 | return ret; | |
2730 | } | |
2731 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2732 | ||
2733 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2734 | struct ib_cm_id *listen_id) | |
2735 | { | |
2736 | struct cm_sidr_req_msg *sidr_req_msg; | |
2737 | struct ib_cm_sidr_req_event_param *param; | |
2738 | ||
2739 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2740 | work->mad_recv_wc->recv_buf.mad; | |
2741 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2742 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2743 | param->listen_id = listen_id; |
a977049d HR |
2744 | param->port = work->port->port_num; |
2745 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2746 | } | |
2747 | ||
2748 | static int cm_sidr_req_handler(struct cm_work *work) | |
2749 | { | |
2750 | struct ib_cm_id *cm_id; | |
2751 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2752 | struct cm_sidr_req_msg *sidr_req_msg; | |
2753 | struct ib_wc *wc; | |
2754 | unsigned long flags; | |
2755 | ||
07d357d0 | 2756 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
2757 | if (IS_ERR(cm_id)) |
2758 | return PTR_ERR(cm_id); | |
2759 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2760 | ||
2761 | /* Record SGID/SLID and request ID for lookup. */ | |
2762 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2763 | work->mad_recv_wc->recv_buf.mad; | |
2764 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2765 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2766 | cm_id_priv->av.dgid.global.interface_id = 0; |
2767 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 2768 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
2769 | &cm_id_priv->av); |
2770 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
2771 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; | |
2772 | cm_id_priv->tid = sidr_req_msg->hdr.tid; | |
2773 | atomic_inc(&cm_id_priv->work_count); | |
2774 | ||
2775 | spin_lock_irqsave(&cm.lock, flags); | |
2776 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); | |
2777 | if (cur_cm_id_priv) { | |
2778 | spin_unlock_irqrestore(&cm.lock, flags); | |
2779 | goto out; /* Duplicate message. */ | |
2780 | } | |
07d357d0 | 2781 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
2782 | sidr_req_msg->service_id, |
2783 | sidr_req_msg->private_data); | |
a977049d HR |
2784 | if (!cur_cm_id_priv) { |
2785 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2786 | spin_unlock_irqrestore(&cm.lock, flags); | |
2787 | /* todo: reply with no match */ | |
2788 | goto out; /* No match. */ | |
2789 | } | |
2790 | atomic_inc(&cur_cm_id_priv->refcount); | |
2791 | spin_unlock_irqrestore(&cm.lock, flags); | |
2792 | ||
2793 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2794 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2795 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2796 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2797 | |
2798 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2799 | cm_process_work(cm_id_priv, work); | |
2800 | cm_deref_id(cur_cm_id_priv); | |
2801 | return 0; | |
2802 | out: | |
2803 | ib_destroy_cm_id(&cm_id_priv->id); | |
2804 | return -EINVAL; | |
2805 | } | |
2806 | ||
2807 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2808 | struct cm_id_private *cm_id_priv, | |
2809 | struct ib_cm_sidr_rep_param *param) | |
2810 | { | |
2811 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2812 | cm_id_priv->tid); | |
2813 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2814 | sidr_rep_msg->status = param->status; | |
2815 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2816 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2817 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2818 | ||
2819 | if (param->info && param->info_length) | |
2820 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2821 | ||
2822 | if (param->private_data && param->private_data_len) | |
2823 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2824 | param->private_data_len); | |
2825 | } | |
2826 | ||
2827 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
2828 | struct ib_cm_sidr_rep_param *param) | |
2829 | { | |
2830 | struct cm_id_private *cm_id_priv; | |
2831 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2832 | unsigned long flags; |
2833 | int ret; | |
2834 | ||
2835 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
2836 | (param->private_data && | |
2837 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
2838 | return -EINVAL; | |
2839 | ||
2840 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2841 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2842 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
2843 | ret = -EINVAL; | |
2844 | goto error; | |
2845 | } | |
2846 | ||
2847 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2848 | if (ret) | |
2849 | goto error; | |
2850 | ||
2851 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
2852 | param); | |
34816ad9 | 2853 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2854 | if (ret) { |
2855 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2856 | cm_free_msg(msg); | |
2857 | return ret; | |
2858 | } | |
2859 | cm_id->state = IB_CM_IDLE; | |
2860 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2861 | ||
2862 | spin_lock_irqsave(&cm.lock, flags); | |
2863 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2864 | spin_unlock_irqrestore(&cm.lock, flags); | |
2865 | return 0; | |
2866 | ||
2867 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2868 | return ret; | |
2869 | } | |
2870 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
2871 | ||
2872 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
2873 | { | |
2874 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2875 | struct ib_cm_sidr_rep_event_param *param; | |
2876 | ||
2877 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2878 | work->mad_recv_wc->recv_buf.mad; | |
2879 | param = &work->cm_event.param.sidr_rep_rcvd; | |
2880 | param->status = sidr_rep_msg->status; | |
2881 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
2882 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
2883 | param->info = &sidr_rep_msg->info; | |
2884 | param->info_len = sidr_rep_msg->info_length; | |
2885 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
2886 | } | |
2887 | ||
2888 | static int cm_sidr_rep_handler(struct cm_work *work) | |
2889 | { | |
2890 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2891 | struct cm_id_private *cm_id_priv; | |
2892 | unsigned long flags; | |
2893 | ||
2894 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2895 | work->mad_recv_wc->recv_buf.mad; | |
2896 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
2897 | if (!cm_id_priv) | |
2898 | return -EINVAL; /* Unmatched reply. */ | |
2899 | ||
2900 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2901 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { | |
2902 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2903 | goto out; | |
2904 | } | |
2905 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 2906 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2907 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
2908 | ||
2909 | cm_format_sidr_rep_event(work); | |
2910 | cm_process_work(cm_id_priv, work); | |
2911 | return 0; | |
2912 | out: | |
2913 | cm_deref_id(cm_id_priv); | |
2914 | return -EINVAL; | |
2915 | } | |
2916 | ||
2917 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
2918 | enum ib_wc_status wc_status) | |
2919 | { | |
2920 | struct cm_id_private *cm_id_priv; | |
2921 | struct ib_cm_event cm_event; | |
2922 | enum ib_cm_state state; | |
2923 | unsigned long flags; | |
2924 | int ret; | |
2925 | ||
2926 | memset(&cm_event, 0, sizeof cm_event); | |
2927 | cm_id_priv = msg->context[0]; | |
2928 | ||
2929 | /* Discard old sends or ones without a response. */ | |
2930 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2931 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; | |
2932 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
2933 | goto discard; | |
2934 | ||
2935 | switch (state) { | |
2936 | case IB_CM_REQ_SENT: | |
2937 | case IB_CM_MRA_REQ_RCVD: | |
2938 | cm_reset_to_idle(cm_id_priv); | |
2939 | cm_event.event = IB_CM_REQ_ERROR; | |
2940 | break; | |
2941 | case IB_CM_REP_SENT: | |
2942 | case IB_CM_MRA_REP_RCVD: | |
2943 | cm_reset_to_idle(cm_id_priv); | |
2944 | cm_event.event = IB_CM_REP_ERROR; | |
2945 | break; | |
2946 | case IB_CM_DREQ_SENT: | |
2947 | cm_enter_timewait(cm_id_priv); | |
2948 | cm_event.event = IB_CM_DREQ_ERROR; | |
2949 | break; | |
2950 | case IB_CM_SIDR_REQ_SENT: | |
2951 | cm_id_priv->id.state = IB_CM_IDLE; | |
2952 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
2953 | break; | |
2954 | default: | |
2955 | goto discard; | |
2956 | } | |
2957 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2958 | cm_event.param.send_status = wc_status; | |
2959 | ||
2960 | /* No other events can occur on the cm_id at this point. */ | |
2961 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
2962 | cm_free_msg(msg); | |
2963 | if (ret) | |
2964 | ib_destroy_cm_id(&cm_id_priv->id); | |
2965 | return; | |
2966 | discard: | |
2967 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2968 | cm_free_msg(msg); | |
2969 | } | |
2970 | ||
2971 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
2972 | struct ib_mad_send_wc *mad_send_wc) | |
2973 | { | |
34816ad9 | 2974 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
a977049d HR |
2975 | |
2976 | switch (mad_send_wc->status) { | |
2977 | case IB_WC_SUCCESS: | |
2978 | case IB_WC_WR_FLUSH_ERR: | |
2979 | cm_free_msg(msg); | |
2980 | break; | |
2981 | default: | |
2982 | if (msg->context[0] && msg->context[1]) | |
2983 | cm_process_send_error(msg, mad_send_wc->status); | |
2984 | else | |
2985 | cm_free_msg(msg); | |
2986 | break; | |
2987 | } | |
2988 | } | |
2989 | ||
2990 | static void cm_work_handler(void *data) | |
2991 | { | |
2992 | struct cm_work *work = data; | |
2993 | int ret; | |
2994 | ||
2995 | switch (work->cm_event.event) { | |
2996 | case IB_CM_REQ_RECEIVED: | |
2997 | ret = cm_req_handler(work); | |
2998 | break; | |
2999 | case IB_CM_MRA_RECEIVED: | |
3000 | ret = cm_mra_handler(work); | |
3001 | break; | |
3002 | case IB_CM_REJ_RECEIVED: | |
3003 | ret = cm_rej_handler(work); | |
3004 | break; | |
3005 | case IB_CM_REP_RECEIVED: | |
3006 | ret = cm_rep_handler(work); | |
3007 | break; | |
3008 | case IB_CM_RTU_RECEIVED: | |
3009 | ret = cm_rtu_handler(work); | |
3010 | break; | |
3011 | case IB_CM_USER_ESTABLISHED: | |
3012 | ret = cm_establish_handler(work); | |
3013 | break; | |
3014 | case IB_CM_DREQ_RECEIVED: | |
3015 | ret = cm_dreq_handler(work); | |
3016 | break; | |
3017 | case IB_CM_DREP_RECEIVED: | |
3018 | ret = cm_drep_handler(work); | |
3019 | break; | |
3020 | case IB_CM_SIDR_REQ_RECEIVED: | |
3021 | ret = cm_sidr_req_handler(work); | |
3022 | break; | |
3023 | case IB_CM_SIDR_REP_RECEIVED: | |
3024 | ret = cm_sidr_rep_handler(work); | |
3025 | break; | |
3026 | case IB_CM_LAP_RECEIVED: | |
3027 | ret = cm_lap_handler(work); | |
3028 | break; | |
3029 | case IB_CM_APR_RECEIVED: | |
3030 | ret = cm_apr_handler(work); | |
3031 | break; | |
3032 | case IB_CM_TIMEWAIT_EXIT: | |
3033 | ret = cm_timewait_handler(work); | |
3034 | break; | |
3035 | default: | |
3036 | ret = -EINVAL; | |
3037 | break; | |
3038 | } | |
3039 | if (ret) | |
3040 | cm_free_work(work); | |
3041 | } | |
3042 | ||
3043 | int ib_cm_establish(struct ib_cm_id *cm_id) | |
3044 | { | |
3045 | struct cm_id_private *cm_id_priv; | |
3046 | struct cm_work *work; | |
3047 | unsigned long flags; | |
3048 | int ret = 0; | |
3049 | ||
3050 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3051 | if (!work) | |
3052 | return -ENOMEM; | |
3053 | ||
3054 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3055 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3056 | switch (cm_id->state) | |
3057 | { | |
3058 | case IB_CM_REP_SENT: | |
3059 | case IB_CM_MRA_REP_RCVD: | |
3060 | cm_id->state = IB_CM_ESTABLISHED; | |
3061 | break; | |
3062 | case IB_CM_ESTABLISHED: | |
3063 | ret = -EISCONN; | |
3064 | break; | |
3065 | default: | |
3066 | ret = -EINVAL; | |
3067 | break; | |
3068 | } | |
3069 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3070 | ||
3071 | if (ret) { | |
3072 | kfree(work); | |
3073 | goto out; | |
3074 | } | |
3075 | ||
3076 | /* | |
3077 | * The CM worker thread may try to destroy the cm_id before it | |
3078 | * can execute this work item. To prevent potential deadlock, | |
3079 | * we need to find the cm_id once we're in the context of the | |
3080 | * worker thread, rather than holding a reference on it. | |
3081 | */ | |
3082 | INIT_WORK(&work->work, cm_work_handler, work); | |
3083 | work->local_id = cm_id->local_id; | |
3084 | work->remote_id = cm_id->remote_id; | |
3085 | work->mad_recv_wc = NULL; | |
3086 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
3087 | queue_work(cm.wq, &work->work); | |
3088 | out: | |
3089 | return ret; | |
3090 | } | |
3091 | EXPORT_SYMBOL(ib_cm_establish); | |
3092 | ||
3093 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3094 | struct ib_mad_recv_wc *mad_recv_wc) | |
3095 | { | |
3096 | struct cm_work *work; | |
3097 | enum ib_cm_event_type event; | |
3098 | int paths = 0; | |
3099 | ||
3100 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3101 | case CM_REQ_ATTR_ID: | |
3102 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3103 | alt_local_lid != 0); | |
3104 | event = IB_CM_REQ_RECEIVED; | |
3105 | break; | |
3106 | case CM_MRA_ATTR_ID: | |
3107 | event = IB_CM_MRA_RECEIVED; | |
3108 | break; | |
3109 | case CM_REJ_ATTR_ID: | |
3110 | event = IB_CM_REJ_RECEIVED; | |
3111 | break; | |
3112 | case CM_REP_ATTR_ID: | |
3113 | event = IB_CM_REP_RECEIVED; | |
3114 | break; | |
3115 | case CM_RTU_ATTR_ID: | |
3116 | event = IB_CM_RTU_RECEIVED; | |
3117 | break; | |
3118 | case CM_DREQ_ATTR_ID: | |
3119 | event = IB_CM_DREQ_RECEIVED; | |
3120 | break; | |
3121 | case CM_DREP_ATTR_ID: | |
3122 | event = IB_CM_DREP_RECEIVED; | |
3123 | break; | |
3124 | case CM_SIDR_REQ_ATTR_ID: | |
3125 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3126 | break; | |
3127 | case CM_SIDR_REP_ATTR_ID: | |
3128 | event = IB_CM_SIDR_REP_RECEIVED; | |
3129 | break; | |
3130 | case CM_LAP_ATTR_ID: | |
3131 | paths = 1; | |
3132 | event = IB_CM_LAP_RECEIVED; | |
3133 | break; | |
3134 | case CM_APR_ATTR_ID: | |
3135 | event = IB_CM_APR_RECEIVED; | |
3136 | break; | |
3137 | default: | |
3138 | ib_free_recv_mad(mad_recv_wc); | |
3139 | return; | |
3140 | } | |
3141 | ||
3142 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, | |
3143 | GFP_KERNEL); | |
3144 | if (!work) { | |
3145 | ib_free_recv_mad(mad_recv_wc); | |
3146 | return; | |
3147 | } | |
3148 | ||
3149 | INIT_WORK(&work->work, cm_work_handler, work); | |
3150 | work->cm_event.event = event; | |
3151 | work->mad_recv_wc = mad_recv_wc; | |
3152 | work->port = (struct cm_port *)mad_agent->context; | |
3153 | queue_work(cm.wq, &work->work); | |
3154 | } | |
3155 | ||
3156 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3157 | struct ib_qp_attr *qp_attr, | |
3158 | int *qp_attr_mask) | |
3159 | { | |
3160 | unsigned long flags; | |
3161 | int ret; | |
3162 | ||
3163 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3164 | switch (cm_id_priv->id.state) { | |
3165 | case IB_CM_REQ_SENT: | |
3166 | case IB_CM_MRA_REQ_RCVD: | |
3167 | case IB_CM_REQ_RCVD: | |
3168 | case IB_CM_MRA_REQ_SENT: | |
3169 | case IB_CM_REP_RCVD: | |
3170 | case IB_CM_MRA_REP_SENT: | |
3171 | case IB_CM_REP_SENT: | |
3172 | case IB_CM_MRA_REP_RCVD: | |
3173 | case IB_CM_ESTABLISHED: | |
3174 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3175 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
ae7971a7 SH |
3176 | qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE | |
3177 | IB_ACCESS_REMOTE_WRITE; | |
a977049d | 3178 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3179 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3180 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3181 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3182 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3183 | ret = 0; | |
3184 | break; | |
3185 | default: | |
3186 | ret = -EINVAL; | |
3187 | break; | |
3188 | } | |
3189 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3190 | return ret; | |
3191 | } | |
3192 | ||
3193 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3194 | struct ib_qp_attr *qp_attr, | |
3195 | int *qp_attr_mask) | |
3196 | { | |
3197 | unsigned long flags; | |
3198 | int ret; | |
3199 | ||
3200 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3201 | switch (cm_id_priv->id.state) { | |
3202 | case IB_CM_REQ_RCVD: | |
3203 | case IB_CM_MRA_REQ_SENT: | |
3204 | case IB_CM_REP_RCVD: | |
3205 | case IB_CM_MRA_REP_SENT: | |
3206 | case IB_CM_REP_SENT: | |
3207 | case IB_CM_MRA_REP_RCVD: | |
3208 | case IB_CM_ESTABLISHED: | |
3209 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3210 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3211 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3212 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3213 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3214 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
ae7971a7 SH |
3215 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3216 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | | |
3217 | IB_QP_MIN_RNR_TIMER; | |
3218 | qp_attr->max_dest_rd_atomic = | |
3219 | cm_id_priv->responder_resources; | |
3220 | qp_attr->min_rnr_timer = 0; | |
3221 | } | |
a977049d HR |
3222 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3223 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3224 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
a977049d HR |
3225 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3226 | } | |
3227 | ret = 0; | |
3228 | break; | |
3229 | default: | |
3230 | ret = -EINVAL; | |
3231 | break; | |
3232 | } | |
3233 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3234 | return ret; | |
3235 | } | |
3236 | ||
3237 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3238 | struct ib_qp_attr *qp_attr, | |
3239 | int *qp_attr_mask) | |
3240 | { | |
3241 | unsigned long flags; | |
3242 | int ret; | |
3243 | ||
3244 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3245 | switch (cm_id_priv->id.state) { | |
3246 | case IB_CM_REP_RCVD: | |
3247 | case IB_CM_MRA_REP_SENT: | |
3248 | case IB_CM_REP_SENT: | |
3249 | case IB_CM_MRA_REP_RCVD: | |
3250 | case IB_CM_ESTABLISHED: | |
ae7971a7 | 3251 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; |
a977049d | 3252 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); |
ae7971a7 SH |
3253 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3254 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3255 | IB_QP_RNR_RETRY | | |
3256 | IB_QP_MAX_QP_RD_ATOMIC; | |
3257 | qp_attr->timeout = cm_id_priv->local_ack_timeout; | |
3258 | qp_attr->retry_cnt = cm_id_priv->retry_count; | |
3259 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3260 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; | |
3261 | } | |
a977049d HR |
3262 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3263 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3264 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3265 | } | |
3266 | ret = 0; | |
3267 | break; | |
3268 | default: | |
3269 | ret = -EINVAL; | |
3270 | break; | |
3271 | } | |
3272 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3273 | return ret; | |
3274 | } | |
3275 | ||
3276 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3277 | struct ib_qp_attr *qp_attr, | |
3278 | int *qp_attr_mask) | |
3279 | { | |
3280 | struct cm_id_private *cm_id_priv; | |
3281 | int ret; | |
3282 | ||
3283 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3284 | switch (qp_attr->qp_state) { | |
3285 | case IB_QPS_INIT: | |
3286 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3287 | break; | |
3288 | case IB_QPS_RTR: | |
3289 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3290 | break; | |
3291 | case IB_QPS_RTS: | |
3292 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3293 | break; | |
3294 | default: | |
3295 | ret = -EINVAL; | |
3296 | break; | |
3297 | } | |
3298 | return ret; | |
3299 | } | |
3300 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3301 | ||
a977049d HR |
3302 | static void cm_add_one(struct ib_device *device) |
3303 | { | |
3304 | struct cm_device *cm_dev; | |
3305 | struct cm_port *port; | |
3306 | struct ib_mad_reg_req reg_req = { | |
3307 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3308 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3309 | }; | |
3310 | struct ib_port_modify port_modify = { | |
3311 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3312 | }; | |
3313 | unsigned long flags; | |
3314 | int ret; | |
3315 | u8 i; | |
3316 | ||
07ebafba TT |
3317 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
3318 | return; | |
3319 | ||
a977049d HR |
3320 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * |
3321 | device->phys_port_cnt, GFP_KERNEL); | |
3322 | if (!cm_dev) | |
3323 | return; | |
3324 | ||
3325 | cm_dev->device = device; | |
cf311cd4 | 3326 | cm_dev->ca_guid = device->node_guid; |
a977049d HR |
3327 | |
3328 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); | |
3329 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3330 | port = &cm_dev->port[i-1]; | |
3331 | port->cm_dev = cm_dev; | |
3332 | port->port_num = i; | |
3333 | port->mad_agent = ib_register_mad_agent(device, i, | |
3334 | IB_QPT_GSI, | |
3335 | ®_req, | |
3336 | 0, | |
3337 | cm_send_handler, | |
3338 | cm_recv_handler, | |
3339 | port); | |
3340 | if (IS_ERR(port->mad_agent)) | |
cf311cd4 | 3341 | goto error1; |
a977049d HR |
3342 | |
3343 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3344 | if (ret) | |
cf311cd4 | 3345 | goto error2; |
a977049d HR |
3346 | } |
3347 | ib_set_client_data(device, &cm_client, cm_dev); | |
3348 | ||
3349 | write_lock_irqsave(&cm.device_lock, flags); | |
3350 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3351 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3352 | return; | |
3353 | ||
a977049d | 3354 | error2: |
cf311cd4 SH |
3355 | ib_unregister_mad_agent(port->mad_agent); |
3356 | error1: | |
a977049d HR |
3357 | port_modify.set_port_cap_mask = 0; |
3358 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3359 | while (--i) { | |
3360 | port = &cm_dev->port[i-1]; | |
3361 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3362 | ib_unregister_mad_agent(port->mad_agent); | |
3363 | } | |
a977049d HR |
3364 | kfree(cm_dev); |
3365 | } | |
3366 | ||
3367 | static void cm_remove_one(struct ib_device *device) | |
3368 | { | |
3369 | struct cm_device *cm_dev; | |
3370 | struct cm_port *port; | |
3371 | struct ib_port_modify port_modify = { | |
3372 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3373 | }; | |
3374 | unsigned long flags; | |
3375 | int i; | |
3376 | ||
3377 | cm_dev = ib_get_client_data(device, &cm_client); | |
3378 | if (!cm_dev) | |
3379 | return; | |
3380 | ||
3381 | write_lock_irqsave(&cm.device_lock, flags); | |
3382 | list_del(&cm_dev->list); | |
3383 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3384 | ||
3385 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3386 | port = &cm_dev->port[i-1]; | |
3387 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3388 | ib_unregister_mad_agent(port->mad_agent); | |
3389 | } | |
3390 | kfree(cm_dev); | |
3391 | } | |
3392 | ||
3393 | static int __init ib_cm_init(void) | |
3394 | { | |
3395 | int ret; | |
3396 | ||
3397 | memset(&cm, 0, sizeof cm); | |
3398 | INIT_LIST_HEAD(&cm.device_list); | |
3399 | rwlock_init(&cm.device_lock); | |
3400 | spin_lock_init(&cm.lock); | |
3401 | cm.listen_service_table = RB_ROOT; | |
3402 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3403 | cm.remote_id_table = RB_ROOT; | |
3404 | cm.remote_qp_table = RB_ROOT; | |
3405 | cm.remote_sidr_table = RB_ROOT; | |
3406 | idr_init(&cm.local_id_table); | |
f06d2653 | 3407 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
a977049d | 3408 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
8575329d | 3409 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d HR |
3410 | |
3411 | cm.wq = create_workqueue("ib_cm"); | |
3412 | if (!cm.wq) | |
3413 | return -ENOMEM; | |
3414 | ||
3415 | ret = ib_register_client(&cm_client); | |
3416 | if (ret) | |
3417 | goto error; | |
3418 | ||
3419 | return 0; | |
3420 | error: | |
3421 | destroy_workqueue(cm.wq); | |
3422 | return ret; | |
3423 | } | |
3424 | ||
3425 | static void __exit ib_cm_cleanup(void) | |
3426 | { | |
8575329d SH |
3427 | struct cm_timewait_info *timewait_info, *tmp; |
3428 | ||
3429 | spin_lock_irq(&cm.lock); | |
3430 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3431 | cancel_delayed_work(&timewait_info->work.work); | |
3432 | spin_unlock_irq(&cm.lock); | |
3433 | ||
a977049d | 3434 | destroy_workqueue(cm.wq); |
8575329d SH |
3435 | |
3436 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3437 | list_del(&timewait_info->list); | |
3438 | kfree(timewait_info); | |
3439 | } | |
3440 | ||
a977049d | 3441 | ib_unregister_client(&cm_client); |
5d7edb3c | 3442 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3443 | } |
3444 | ||
3445 | module_init(ib_cm_init); | |
3446 | module_exit(ib_cm_cleanup); | |
3447 |