Commit | Line | Data |
---|---|---|
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> | |
f06d2653 | 43 | #include <linux/random.h> |
a977049d HR |
44 | #include <linux/rbtree.h> |
45 | #include <linux/spinlock.h> | |
46 | #include <linux/workqueue.h> | |
47 | ||
a4d61e84 RD |
48 | #include <rdma/ib_cache.h> |
49 | #include <rdma/ib_cm.h> | |
a977049d HR |
50 | #include "cm_msgs.h" |
51 | ||
52 | MODULE_AUTHOR("Sean Hefty"); | |
53 | MODULE_DESCRIPTION("InfiniBand CM"); | |
54 | MODULE_LICENSE("Dual BSD/GPL"); | |
55 | ||
56 | static void cm_add_one(struct ib_device *device); | |
57 | static void cm_remove_one(struct ib_device *device); | |
58 | ||
59 | static struct ib_client cm_client = { | |
60 | .name = "cm", | |
61 | .add = cm_add_one, | |
62 | .remove = cm_remove_one | |
63 | }; | |
64 | ||
65 | static struct ib_cm { | |
66 | spinlock_t lock; | |
67 | struct list_head device_list; | |
68 | rwlock_t device_lock; | |
69 | struct rb_root listen_service_table; | |
70 | u64 listen_service_id; | |
71 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
72 | struct rb_root remote_qp_table; | |
73 | struct rb_root remote_id_table; | |
74 | struct rb_root remote_sidr_table; | |
75 | struct idr local_id_table; | |
f06d2653 | 76 | __be32 random_id_operand; |
8575329d | 77 | struct list_head timewait_list; |
a977049d HR |
78 | struct workqueue_struct *wq; |
79 | } cm; | |
80 | ||
81 | struct cm_port { | |
82 | struct cm_device *cm_dev; | |
83 | struct ib_mad_agent *mad_agent; | |
84 | u8 port_num; | |
85 | }; | |
86 | ||
87 | struct cm_device { | |
88 | struct list_head list; | |
89 | struct ib_device *device; | |
1d846126 | 90 | u8 ack_delay; |
a977049d HR |
91 | struct cm_port port[0]; |
92 | }; | |
93 | ||
94 | struct cm_av { | |
95 | struct cm_port *port; | |
96 | union ib_gid dgid; | |
97 | struct ib_ah_attr ah_attr; | |
98 | u16 pkey_index; | |
1d846126 | 99 | u8 timeout; |
a977049d HR |
100 | }; |
101 | ||
102 | struct cm_work { | |
c4028958 | 103 | struct delayed_work work; |
a977049d HR |
104 | struct list_head list; |
105 | struct cm_port *port; | |
106 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
107 | __be32 local_id; /* Established / timewait */ |
108 | __be32 remote_id; | |
a977049d HR |
109 | struct ib_cm_event cm_event; |
110 | struct ib_sa_path_rec path[0]; | |
111 | }; | |
112 | ||
113 | struct cm_timewait_info { | |
114 | struct cm_work work; /* Must be first. */ | |
8575329d | 115 | struct list_head list; |
a977049d HR |
116 | struct rb_node remote_qp_node; |
117 | struct rb_node remote_id_node; | |
97f52eb4 SH |
118 | __be64 remote_ca_guid; |
119 | __be32 remote_qpn; | |
a977049d HR |
120 | u8 inserted_remote_qp; |
121 | u8 inserted_remote_id; | |
122 | }; | |
123 | ||
124 | struct cm_id_private { | |
125 | struct ib_cm_id id; | |
126 | ||
127 | struct rb_node service_node; | |
128 | struct rb_node sidr_id_node; | |
87fd1a11 | 129 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 130 | struct completion comp; |
a977049d HR |
131 | atomic_t refcount; |
132 | ||
133 | struct ib_mad_send_buf *msg; | |
134 | struct cm_timewait_info *timewait_info; | |
135 | /* todo: use alternate port on send failure */ | |
136 | struct cm_av av; | |
137 | struct cm_av alt_av; | |
6e61d04f | 138 | struct ib_cm_compare_data *compare_data; |
a977049d HR |
139 | |
140 | void *private_data; | |
97f52eb4 SH |
141 | __be64 tid; |
142 | __be32 local_qpn; | |
143 | __be32 remote_qpn; | |
ae7971a7 | 144 | enum ib_qp_type qp_type; |
97f52eb4 SH |
145 | __be32 sq_psn; |
146 | __be32 rq_psn; | |
a977049d HR |
147 | int timeout_ms; |
148 | enum ib_mtu path_mtu; | |
e1444b5a | 149 | __be16 pkey; |
a977049d HR |
150 | u8 private_data_len; |
151 | u8 max_cm_retries; | |
152 | u8 peer_to_peer; | |
153 | u8 responder_resources; | |
154 | u8 initiator_depth; | |
a977049d HR |
155 | u8 retry_count; |
156 | u8 rnr_retry_count; | |
157 | u8 service_timeout; | |
1d846126 | 158 | u8 target_ack_delay; |
a977049d HR |
159 | |
160 | struct list_head work_list; | |
161 | atomic_t work_count; | |
162 | }; | |
163 | ||
c4028958 | 164 | static void cm_work_handler(struct work_struct *work); |
a977049d HR |
165 | |
166 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
167 | { | |
168 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 169 | complete(&cm_id_priv->comp); |
a977049d HR |
170 | } |
171 | ||
172 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
173 | struct ib_mad_send_buf **msg) | |
174 | { | |
175 | struct ib_mad_agent *mad_agent; | |
176 | struct ib_mad_send_buf *m; | |
177 | struct ib_ah *ah; | |
178 | ||
179 | mad_agent = cm_id_priv->av.port->mad_agent; | |
180 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
181 | if (IS_ERR(ah)) | |
182 | return PTR_ERR(ah); | |
183 | ||
3cd96564 | 184 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
354ba39c | 185 | cm_id_priv->av.pkey_index, |
34816ad9 | 186 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
187 | GFP_ATOMIC); |
188 | if (IS_ERR(m)) { | |
189 | ib_destroy_ah(ah); | |
190 | return PTR_ERR(m); | |
191 | } | |
192 | ||
193 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
194 | m->ah = ah; |
195 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
196 | |
197 | atomic_inc(&cm_id_priv->refcount); | |
198 | m->context[0] = cm_id_priv; | |
199 | *msg = m; | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static int cm_alloc_response_msg(struct cm_port *port, | |
204 | struct ib_mad_recv_wc *mad_recv_wc, | |
205 | struct ib_mad_send_buf **msg) | |
206 | { | |
207 | struct ib_mad_send_buf *m; | |
208 | struct ib_ah *ah; | |
209 | ||
210 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
211 | mad_recv_wc->recv_buf.grh, port->port_num); | |
212 | if (IS_ERR(ah)) | |
213 | return PTR_ERR(ah); | |
214 | ||
215 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 216 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
217 | GFP_ATOMIC); |
218 | if (IS_ERR(m)) { | |
219 | ib_destroy_ah(ah); | |
220 | return PTR_ERR(m); | |
221 | } | |
34816ad9 | 222 | m->ah = ah; |
a977049d HR |
223 | *msg = m; |
224 | return 0; | |
225 | } | |
226 | ||
227 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
228 | { | |
34816ad9 | 229 | ib_destroy_ah(msg->ah); |
a977049d HR |
230 | if (msg->context[0]) |
231 | cm_deref_id(msg->context[0]); | |
232 | ib_free_send_mad(msg); | |
233 | } | |
234 | ||
235 | static void * cm_copy_private_data(const void *private_data, | |
236 | u8 private_data_len) | |
237 | { | |
238 | void *data; | |
239 | ||
240 | if (!private_data || !private_data_len) | |
241 | return NULL; | |
242 | ||
bed8bdfd | 243 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
a977049d HR |
244 | if (!data) |
245 | return ERR_PTR(-ENOMEM); | |
246 | ||
a977049d HR |
247 | return data; |
248 | } | |
249 | ||
250 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
251 | void *private_data, u8 private_data_len) | |
252 | { | |
253 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
254 | kfree(cm_id_priv->private_data); | |
255 | ||
256 | cm_id_priv->private_data = private_data; | |
257 | cm_id_priv->private_data_len = private_data_len; | |
258 | } | |
259 | ||
ca222c6b SH |
260 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
261 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
262 | { |
263 | av->port = port; | |
264 | av->pkey_index = wc->pkey_index; | |
ca222c6b SH |
265 | ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc, |
266 | grh, &av->ah_attr); | |
a977049d HR |
267 | } |
268 | ||
269 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
270 | { | |
271 | struct cm_device *cm_dev; | |
272 | struct cm_port *port = NULL; | |
273 | unsigned long flags; | |
274 | int ret; | |
275 | u8 p; | |
276 | ||
277 | read_lock_irqsave(&cm.device_lock, flags); | |
278 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
279 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, | |
280 | &p, NULL)) { | |
281 | port = &cm_dev->port[p-1]; | |
282 | break; | |
283 | } | |
284 | } | |
285 | read_unlock_irqrestore(&cm.device_lock, flags); | |
286 | ||
287 | if (!port) | |
288 | return -EINVAL; | |
289 | ||
290 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, | |
291 | be16_to_cpu(path->pkey), &av->pkey_index); | |
292 | if (ret) | |
293 | return ret; | |
294 | ||
295 | av->port = port; | |
ca222c6b SH |
296 | ib_init_ah_from_path(cm_dev->device, port->port_num, path, |
297 | &av->ah_attr); | |
1d846126 | 298 | av->timeout = path->packet_life_time + 1; |
a977049d HR |
299 | return 0; |
300 | } | |
301 | ||
302 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
303 | { | |
304 | unsigned long flags; | |
f06d2653 | 305 | int ret, id; |
de1bb1a6 | 306 | static int next_id; |
a977049d HR |
307 | |
308 | do { | |
309 | spin_lock_irqsave(&cm.lock, flags); | |
f06d2653 | 310 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
9f81036c MT |
311 | next_id, &id); |
312 | if (!ret) | |
313 | next_id = ((unsigned) id + 1) & MAX_ID_MASK; | |
a977049d HR |
314 | spin_unlock_irqrestore(&cm.lock, flags); |
315 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
f06d2653 SH |
316 | |
317 | cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand); | |
a977049d HR |
318 | return ret; |
319 | } | |
320 | ||
97f52eb4 | 321 | static void cm_free_id(__be32 local_id) |
a977049d | 322 | { |
24be6e81 | 323 | spin_lock_irq(&cm.lock); |
f06d2653 SH |
324 | idr_remove(&cm.local_id_table, |
325 | (__force int) (local_id ^ cm.random_id_operand)); | |
24be6e81 | 326 | spin_unlock_irq(&cm.lock); |
a977049d HR |
327 | } |
328 | ||
97f52eb4 | 329 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
330 | { |
331 | struct cm_id_private *cm_id_priv; | |
332 | ||
f06d2653 SH |
333 | cm_id_priv = idr_find(&cm.local_id_table, |
334 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
335 | if (cm_id_priv) { |
336 | if (cm_id_priv->id.remote_id == remote_id) | |
337 | atomic_inc(&cm_id_priv->refcount); | |
338 | else | |
339 | cm_id_priv = NULL; | |
340 | } | |
341 | ||
342 | return cm_id_priv; | |
343 | } | |
344 | ||
97f52eb4 | 345 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
346 | { |
347 | struct cm_id_private *cm_id_priv; | |
a977049d | 348 | |
24be6e81 | 349 | spin_lock_irq(&cm.lock); |
a977049d | 350 | cm_id_priv = cm_get_id(local_id, remote_id); |
24be6e81 | 351 | spin_unlock_irq(&cm.lock); |
a977049d HR |
352 | |
353 | return cm_id_priv; | |
354 | } | |
355 | ||
6e61d04f SH |
356 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
357 | { | |
358 | int i; | |
359 | ||
360 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) | |
361 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & | |
362 | ((unsigned long *) mask)[i]; | |
363 | } | |
364 | ||
365 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
366 | struct ib_cm_compare_data *dst_data) | |
367 | { | |
368 | u8 src[IB_CM_COMPARE_SIZE]; | |
369 | u8 dst[IB_CM_COMPARE_SIZE]; | |
370 | ||
371 | if (!src_data || !dst_data) | |
372 | return 0; | |
373 | ||
374 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
375 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
376 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); | |
377 | } | |
378 | ||
379 | static int cm_compare_private_data(u8 *private_data, | |
380 | struct ib_cm_compare_data *dst_data) | |
381 | { | |
382 | u8 src[IB_CM_COMPARE_SIZE]; | |
383 | ||
384 | if (!dst_data) | |
385 | return 0; | |
386 | ||
387 | cm_mask_copy(src, private_data, dst_data->mask); | |
388 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); | |
389 | } | |
390 | ||
a977049d HR |
391 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
392 | { | |
393 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
394 | struct rb_node *parent = NULL; | |
395 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
396 | __be64 service_id = cm_id_priv->id.service_id; |
397 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 398 | int data_cmp; |
a977049d HR |
399 | |
400 | while (*link) { | |
401 | parent = *link; | |
402 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
403 | service_node); | |
6e61d04f SH |
404 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
405 | cur_cm_id_priv->compare_data); | |
a977049d | 406 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 407 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
408 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
409 | !data_cmp) | |
07d357d0 SH |
410 | return cur_cm_id_priv; |
411 | ||
412 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
413 | link = &(*link)->rb_left; | |
414 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
415 | link = &(*link)->rb_right; | |
416 | else if (service_id < cur_cm_id_priv->id.service_id) | |
a977049d | 417 | link = &(*link)->rb_left; |
6e61d04f SH |
418 | else if (service_id > cur_cm_id_priv->id.service_id) |
419 | link = &(*link)->rb_right; | |
420 | else if (data_cmp < 0) | |
421 | link = &(*link)->rb_left; | |
a977049d HR |
422 | else |
423 | link = &(*link)->rb_right; | |
424 | } | |
425 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
426 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
427 | return NULL; | |
428 | } | |
429 | ||
07d357d0 | 430 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f SH |
431 | __be64 service_id, |
432 | u8 *private_data) | |
a977049d HR |
433 | { |
434 | struct rb_node *node = cm.listen_service_table.rb_node; | |
435 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 436 | int data_cmp; |
a977049d HR |
437 | |
438 | while (node) { | |
439 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
440 | data_cmp = cm_compare_private_data(private_data, |
441 | cm_id_priv->compare_data); | |
a977049d | 442 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 443 | cm_id_priv->id.service_id && |
6e61d04f | 444 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 445 | return cm_id_priv; |
07d357d0 SH |
446 | |
447 | if (device < cm_id_priv->id.device) | |
448 | node = node->rb_left; | |
449 | else if (device > cm_id_priv->id.device) | |
450 | node = node->rb_right; | |
451 | else if (service_id < cm_id_priv->id.service_id) | |
a977049d | 452 | node = node->rb_left; |
6e61d04f SH |
453 | else if (service_id > cm_id_priv->id.service_id) |
454 | node = node->rb_right; | |
455 | else if (data_cmp < 0) | |
456 | node = node->rb_left; | |
a977049d HR |
457 | else |
458 | node = node->rb_right; | |
459 | } | |
460 | return NULL; | |
461 | } | |
462 | ||
463 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
464 | *timewait_info) | |
465 | { | |
466 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
467 | struct rb_node *parent = NULL; | |
468 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
469 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
470 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
471 | |
472 | while (*link) { | |
473 | parent = *link; | |
474 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
475 | remote_id_node); | |
476 | if (remote_id < cur_timewait_info->work.remote_id) | |
477 | link = &(*link)->rb_left; | |
478 | else if (remote_id > cur_timewait_info->work.remote_id) | |
479 | link = &(*link)->rb_right; | |
480 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
481 | link = &(*link)->rb_left; | |
482 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
483 | link = &(*link)->rb_right; | |
484 | else | |
485 | return cur_timewait_info; | |
486 | } | |
487 | timewait_info->inserted_remote_id = 1; | |
488 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
489 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
490 | return NULL; | |
491 | } | |
492 | ||
97f52eb4 SH |
493 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
494 | __be32 remote_id) | |
a977049d HR |
495 | { |
496 | struct rb_node *node = cm.remote_id_table.rb_node; | |
497 | struct cm_timewait_info *timewait_info; | |
498 | ||
499 | while (node) { | |
500 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
501 | remote_id_node); | |
502 | if (remote_id < timewait_info->work.remote_id) | |
503 | node = node->rb_left; | |
504 | else if (remote_id > timewait_info->work.remote_id) | |
505 | node = node->rb_right; | |
506 | else if (remote_ca_guid < timewait_info->remote_ca_guid) | |
507 | node = node->rb_left; | |
508 | else if (remote_ca_guid > timewait_info->remote_ca_guid) | |
509 | node = node->rb_right; | |
510 | else | |
511 | return timewait_info; | |
512 | } | |
513 | return NULL; | |
514 | } | |
515 | ||
516 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
517 | *timewait_info) | |
518 | { | |
519 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
520 | struct rb_node *parent = NULL; | |
521 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
522 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
523 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
524 | |
525 | while (*link) { | |
526 | parent = *link; | |
527 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
528 | remote_qp_node); | |
529 | if (remote_qpn < cur_timewait_info->remote_qpn) | |
530 | link = &(*link)->rb_left; | |
531 | else if (remote_qpn > cur_timewait_info->remote_qpn) | |
532 | link = &(*link)->rb_right; | |
533 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
534 | link = &(*link)->rb_left; | |
535 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
536 | link = &(*link)->rb_right; | |
537 | else | |
538 | return cur_timewait_info; | |
539 | } | |
540 | timewait_info->inserted_remote_qp = 1; | |
541 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
542 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
543 | return NULL; | |
544 | } | |
545 | ||
546 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
547 | *cm_id_priv) | |
548 | { | |
549 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
550 | struct rb_node *parent = NULL; | |
551 | struct cm_id_private *cur_cm_id_priv; | |
552 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 553 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
554 | |
555 | while (*link) { | |
556 | parent = *link; | |
557 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
558 | sidr_id_node); | |
559 | if (remote_id < cur_cm_id_priv->id.remote_id) | |
560 | link = &(*link)->rb_left; | |
561 | else if (remote_id > cur_cm_id_priv->id.remote_id) | |
562 | link = &(*link)->rb_right; | |
563 | else { | |
564 | int cmp; | |
565 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
566 | sizeof *port_gid); | |
567 | if (cmp < 0) | |
568 | link = &(*link)->rb_left; | |
569 | else if (cmp > 0) | |
570 | link = &(*link)->rb_right; | |
571 | else | |
572 | return cur_cm_id_priv; | |
573 | } | |
574 | } | |
575 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
576 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
577 | return NULL; | |
578 | } | |
579 | ||
580 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
581 | enum ib_cm_sidr_status status) | |
582 | { | |
583 | struct ib_cm_sidr_rep_param param; | |
584 | ||
585 | memset(¶m, 0, sizeof param); | |
586 | param.status = status; | |
587 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
588 | } | |
589 | ||
07d357d0 SH |
590 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
591 | ib_cm_handler cm_handler, | |
a977049d HR |
592 | void *context) |
593 | { | |
594 | struct cm_id_private *cm_id_priv; | |
595 | int ret; | |
596 | ||
de6eb66b | 597 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
598 | if (!cm_id_priv) |
599 | return ERR_PTR(-ENOMEM); | |
600 | ||
a977049d | 601 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 602 | cm_id_priv->id.device = device; |
a977049d HR |
603 | cm_id_priv->id.cm_handler = cm_handler; |
604 | cm_id_priv->id.context = context; | |
354ba39c | 605 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
606 | ret = cm_alloc_id(cm_id_priv); |
607 | if (ret) | |
608 | goto error; | |
609 | ||
610 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 611 | init_completion(&cm_id_priv->comp); |
a977049d HR |
612 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
613 | atomic_set(&cm_id_priv->work_count, -1); | |
614 | atomic_set(&cm_id_priv->refcount, 1); | |
615 | return &cm_id_priv->id; | |
616 | ||
617 | error: | |
618 | kfree(cm_id_priv); | |
619 | return ERR_PTR(-ENOMEM); | |
620 | } | |
621 | EXPORT_SYMBOL(ib_create_cm_id); | |
622 | ||
623 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
624 | { | |
625 | struct cm_work *work; | |
626 | ||
627 | if (list_empty(&cm_id_priv->work_list)) | |
628 | return NULL; | |
629 | ||
630 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
631 | list_del(&work->list); | |
632 | return work; | |
633 | } | |
634 | ||
635 | static void cm_free_work(struct cm_work *work) | |
636 | { | |
637 | if (work->mad_recv_wc) | |
638 | ib_free_recv_mad(work->mad_recv_wc); | |
639 | kfree(work); | |
640 | } | |
641 | ||
642 | static inline int cm_convert_to_ms(int iba_time) | |
643 | { | |
644 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
645 | return 1 << max(iba_time - 8, 0); | |
646 | } | |
647 | ||
1d846126 SH |
648 | /* |
649 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time | |
650 | * Because of how ack_timeout is stored, adding one doubles the timeout. | |
651 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and | |
652 | * increment it (round up) only if the other is within 50%. | |
653 | */ | |
654 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) | |
655 | { | |
656 | int ack_timeout = packet_life_time + 1; | |
657 | ||
658 | if (ack_timeout >= ca_ack_delay) | |
659 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); | |
660 | else | |
661 | ack_timeout = ca_ack_delay + | |
662 | (ack_timeout >= (ca_ack_delay - 1)); | |
663 | ||
664 | return min(31, ack_timeout); | |
665 | } | |
666 | ||
a977049d HR |
667 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
668 | { | |
a977049d HR |
669 | if (timewait_info->inserted_remote_id) { |
670 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
671 | timewait_info->inserted_remote_id = 0; | |
672 | } | |
673 | ||
674 | if (timewait_info->inserted_remote_qp) { | |
675 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
676 | timewait_info->inserted_remote_qp = 0; | |
677 | } | |
a977049d HR |
678 | } |
679 | ||
97f52eb4 | 680 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
681 | { |
682 | struct cm_timewait_info *timewait_info; | |
683 | ||
de6eb66b | 684 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
685 | if (!timewait_info) |
686 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
687 | |
688 | timewait_info->work.local_id = local_id; | |
c4028958 | 689 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
a977049d HR |
690 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
691 | return timewait_info; | |
692 | } | |
693 | ||
694 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
695 | { | |
696 | int wait_time; | |
8575329d | 697 | unsigned long flags; |
a977049d | 698 | |
8575329d | 699 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 700 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
701 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
702 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 703 | |
a977049d HR |
704 | /* |
705 | * The cm_id could be destroyed by the user before we exit timewait. | |
706 | * To protect against this, we search for the cm_id after exiting | |
707 | * timewait before notifying the user that we've exited timewait. | |
708 | */ | |
709 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
1d846126 | 710 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d HR |
711 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
712 | msecs_to_jiffies(wait_time)); | |
713 | cm_id_priv->timewait_info = NULL; | |
714 | } | |
715 | ||
716 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
717 | { | |
8575329d SH |
718 | unsigned long flags; |
719 | ||
a977049d HR |
720 | cm_id_priv->id.state = IB_CM_IDLE; |
721 | if (cm_id_priv->timewait_info) { | |
8575329d | 722 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 723 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 724 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
725 | kfree(cm_id_priv->timewait_info); |
726 | cm_id_priv->timewait_info = NULL; | |
727 | } | |
728 | } | |
729 | ||
04c33543 | 730 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
731 | { |
732 | struct cm_id_private *cm_id_priv; | |
733 | struct cm_work *work; | |
a977049d HR |
734 | |
735 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
736 | retest: | |
24be6e81 | 737 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
738 | switch (cm_id->state) { |
739 | case IB_CM_LISTEN: | |
740 | cm_id->state = IB_CM_IDLE; | |
24be6e81 SH |
741 | spin_unlock_irq(&cm_id_priv->lock); |
742 | spin_lock_irq(&cm.lock); | |
a977049d | 743 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
24be6e81 | 744 | spin_unlock_irq(&cm.lock); |
a977049d HR |
745 | break; |
746 | case IB_CM_SIDR_REQ_SENT: | |
747 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 748 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 749 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
750 | break; |
751 | case IB_CM_SIDR_REQ_RCVD: | |
24be6e81 | 752 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
753 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
754 | break; | |
755 | case IB_CM_REQ_SENT: | |
227eca83 | 756 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 757 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 | 758 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
e971b8cd SH |
759 | &cm_id_priv->id.device->node_guid, |
760 | sizeof cm_id_priv->id.device->node_guid, | |
227eca83 SH |
761 | NULL, 0); |
762 | break; | |
04c33543 MT |
763 | case IB_CM_REQ_RCVD: |
764 | if (err == -ENOMEM) { | |
765 | /* Do not reject to allow future retries. */ | |
766 | cm_reset_to_idle(cm_id_priv); | |
24be6e81 | 767 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 | 768 | } else { |
24be6e81 | 769 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 MT |
770 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
771 | NULL, 0, NULL, 0); | |
772 | } | |
773 | break; | |
a977049d HR |
774 | case IB_CM_MRA_REQ_RCVD: |
775 | case IB_CM_REP_SENT: | |
776 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 777 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 778 | /* Fall through */ |
a977049d HR |
779 | case IB_CM_MRA_REQ_SENT: |
780 | case IB_CM_REP_RCVD: | |
781 | case IB_CM_MRA_REP_SENT: | |
24be6e81 | 782 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 SH |
783 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
784 | NULL, 0, NULL, 0); | |
a977049d HR |
785 | break; |
786 | case IB_CM_ESTABLISHED: | |
24be6e81 | 787 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
788 | ib_send_cm_dreq(cm_id, NULL, 0); |
789 | goto retest; | |
790 | case IB_CM_DREQ_SENT: | |
34816ad9 | 791 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 792 | cm_enter_timewait(cm_id_priv); |
24be6e81 | 793 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
794 | break; |
795 | case IB_CM_DREQ_RCVD: | |
24be6e81 | 796 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
797 | ib_send_cm_drep(cm_id, NULL, 0); |
798 | break; | |
799 | default: | |
24be6e81 | 800 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
801 | break; |
802 | } | |
803 | ||
804 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
805 | cm_deref_id(cm_id_priv); |
806 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
807 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
808 | cm_free_work(work); | |
6e61d04f SH |
809 | kfree(cm_id_priv->compare_data); |
810 | kfree(cm_id_priv->private_data); | |
a977049d HR |
811 | kfree(cm_id_priv); |
812 | } | |
04c33543 MT |
813 | |
814 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
815 | { | |
816 | cm_destroy_id(cm_id, 0); | |
817 | } | |
a977049d HR |
818 | EXPORT_SYMBOL(ib_destroy_cm_id); |
819 | ||
6e61d04f SH |
820 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
821 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
822 | { |
823 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
824 | unsigned long flags; | |
825 | int ret = 0; | |
826 | ||
97f52eb4 SH |
827 | service_mask = service_mask ? service_mask : |
828 | __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
829 | service_id &= service_mask; |
830 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
831 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
832 | return -EINVAL; | |
833 | ||
834 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
835 | if (cm_id->state != IB_CM_IDLE) |
836 | return -EINVAL; | |
837 | ||
838 | if (compare_data) { | |
839 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
840 | GFP_KERNEL); | |
841 | if (!cm_id_priv->compare_data) | |
842 | return -ENOMEM; | |
843 | cm_mask_copy(cm_id_priv->compare_data->data, | |
844 | compare_data->data, compare_data->mask); | |
845 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
846 | IB_CM_COMPARE_SIZE); | |
847 | } | |
a977049d HR |
848 | |
849 | cm_id->state = IB_CM_LISTEN; | |
850 | ||
851 | spin_lock_irqsave(&cm.lock, flags); | |
852 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 SH |
853 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
854 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
855 | } else { |
856 | cm_id->service_id = service_id; | |
857 | cm_id->service_mask = service_mask; | |
858 | } | |
859 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
860 | spin_unlock_irqrestore(&cm.lock, flags); | |
861 | ||
862 | if (cur_cm_id_priv) { | |
863 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
864 | kfree(cm_id_priv->compare_data); |
865 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
866 | ret = -EBUSY; |
867 | } | |
868 | return ret; | |
869 | } | |
870 | EXPORT_SYMBOL(ib_cm_listen); | |
871 | ||
97f52eb4 SH |
872 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
873 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
874 | { |
875 | u64 hi_tid, low_tid; | |
876 | ||
877 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
878 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
879 | (msg_seq << 30)); | |
a977049d HR |
880 | return cpu_to_be64(hi_tid | low_tid); |
881 | } | |
882 | ||
883 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 884 | __be16 attr_id, __be64 tid) |
a977049d HR |
885 | { |
886 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
887 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
888 | hdr->class_version = IB_CM_CLASS_VERSION; | |
889 | hdr->method = IB_MGMT_METHOD_SEND; | |
890 | hdr->attr_id = attr_id; | |
891 | hdr->tid = tid; | |
892 | } | |
893 | ||
894 | static void cm_format_req(struct cm_req_msg *req_msg, | |
895 | struct cm_id_private *cm_id_priv, | |
896 | struct ib_cm_req_param *param) | |
897 | { | |
898 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, | |
899 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
900 | ||
901 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
902 | req_msg->service_id = param->service_id; | |
e971b8cd | 903 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d HR |
904 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
905 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
906 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
907 | cm_req_set_remote_resp_timeout(req_msg, | |
908 | param->remote_cm_response_timeout); | |
909 | cm_req_set_qp_type(req_msg, param->qp_type); | |
910 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
911 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
912 | cm_req_set_local_resp_timeout(req_msg, | |
913 | param->local_cm_response_timeout); | |
914 | cm_req_set_retry_count(req_msg, param->retry_count); | |
915 | req_msg->pkey = param->primary_path->pkey; | |
916 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
917 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
918 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
919 | cm_req_set_srq(req_msg, param->srq); | |
920 | ||
921 | req_msg->primary_local_lid = param->primary_path->slid; | |
922 | req_msg->primary_remote_lid = param->primary_path->dlid; | |
923 | req_msg->primary_local_gid = param->primary_path->sgid; | |
924 | req_msg->primary_remote_gid = param->primary_path->dgid; | |
925 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); | |
926 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); | |
927 | req_msg->primary_traffic_class = param->primary_path->traffic_class; | |
928 | req_msg->primary_hop_limit = param->primary_path->hop_limit; | |
929 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); | |
930 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ | |
931 | cm_req_set_primary_local_ack_timeout(req_msg, | |
1d846126 SH |
932 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
933 | param->primary_path->packet_life_time)); | |
a977049d HR |
934 | |
935 | if (param->alternate_path) { | |
936 | req_msg->alt_local_lid = param->alternate_path->slid; | |
937 | req_msg->alt_remote_lid = param->alternate_path->dlid; | |
938 | req_msg->alt_local_gid = param->alternate_path->sgid; | |
939 | req_msg->alt_remote_gid = param->alternate_path->dgid; | |
940 | cm_req_set_alt_flow_label(req_msg, | |
941 | param->alternate_path->flow_label); | |
942 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); | |
943 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; | |
944 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; | |
945 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); | |
946 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ | |
947 | cm_req_set_alt_local_ack_timeout(req_msg, | |
1d846126 SH |
948 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
949 | param->alternate_path->packet_life_time)); | |
a977049d HR |
950 | } |
951 | ||
952 | if (param->private_data && param->private_data_len) | |
953 | memcpy(req_msg->private_data, param->private_data, | |
954 | param->private_data_len); | |
955 | } | |
956 | ||
858119e1 | 957 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
958 | { |
959 | /* peer-to-peer not supported */ | |
960 | if (param->peer_to_peer) | |
961 | return -EINVAL; | |
962 | ||
963 | if (!param->primary_path) | |
964 | return -EINVAL; | |
965 | ||
966 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
967 | return -EINVAL; | |
968 | ||
969 | if (param->private_data && | |
970 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
971 | return -EINVAL; | |
972 | ||
973 | if (param->alternate_path && | |
974 | (param->alternate_path->pkey != param->primary_path->pkey || | |
975 | param->alternate_path->mtu != param->primary_path->mtu)) | |
976 | return -EINVAL; | |
977 | ||
978 | return 0; | |
979 | } | |
980 | ||
981 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
982 | struct ib_cm_req_param *param) | |
983 | { | |
984 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
985 | struct cm_req_msg *req_msg; |
986 | unsigned long flags; | |
987 | int ret; | |
988 | ||
989 | ret = cm_validate_req_param(param); | |
990 | if (ret) | |
991 | return ret; | |
992 | ||
993 | /* Verify that we're not in timewait. */ | |
994 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
995 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
996 | if (cm_id->state != IB_CM_IDLE) { | |
997 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
998 | ret = -EINVAL; | |
999 | goto out; | |
1000 | } | |
1001 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1002 | ||
1003 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1004 | id.local_id); | |
75df23e2 SH |
1005 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1006 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 1007 | goto out; |
75df23e2 | 1008 | } |
a977049d HR |
1009 | |
1010 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
1011 | if (ret) | |
1012 | goto error1; | |
1013 | if (param->alternate_path) { | |
1014 | ret = cm_init_av_by_path(param->alternate_path, | |
1015 | &cm_id_priv->alt_av); | |
1016 | if (ret) | |
1017 | goto error1; | |
1018 | } | |
1019 | cm_id->service_id = param->service_id; | |
97f52eb4 | 1020 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1021 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1022 | param->primary_path->packet_life_time) * 2 + | |
1023 | cm_convert_to_ms( | |
1024 | param->remote_cm_response_timeout); | |
1025 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1026 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1027 | cm_id_priv->responder_resources = param->responder_resources; | |
1028 | cm_id_priv->retry_count = param->retry_count; | |
1029 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1030 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1031 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1032 | |
1033 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1034 | if (ret) | |
1035 | goto error1; | |
1036 | ||
1037 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1038 | cm_format_req(req_msg, cm_id_priv, param); | |
1039 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1040 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1041 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1042 | ||
1043 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1044 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
a977049d HR |
1045 | |
1046 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1047 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1048 | if (ret) { |
1049 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1050 | goto error2; | |
1051 | } | |
1052 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1053 | cm_id->state = IB_CM_REQ_SENT; | |
1054 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1055 | return 0; | |
1056 | ||
1057 | error2: cm_free_msg(cm_id_priv->msg); | |
1058 | error1: kfree(cm_id_priv->timewait_info); | |
1059 | out: return ret; | |
1060 | } | |
1061 | EXPORT_SYMBOL(ib_send_cm_req); | |
1062 | ||
1063 | static int cm_issue_rej(struct cm_port *port, | |
1064 | struct ib_mad_recv_wc *mad_recv_wc, | |
1065 | enum ib_cm_rej_reason reason, | |
1066 | enum cm_msg_response msg_rejected, | |
1067 | void *ari, u8 ari_length) | |
1068 | { | |
1069 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1070 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1071 | int ret; | |
1072 | ||
1073 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1074 | if (ret) | |
1075 | return ret; | |
1076 | ||
1077 | /* We just need common CM header information. Cast to any message. */ | |
1078 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1079 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1080 | ||
1081 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1082 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1083 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1084 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1085 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1086 | |
1087 | if (ari && ari_length) { | |
1088 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1089 | memcpy(rej_msg->ari, ari, ari_length); | |
1090 | } | |
1091 | ||
34816ad9 | 1092 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1093 | if (ret) |
1094 | cm_free_msg(msg); | |
1095 | ||
1096 | return ret; | |
1097 | } | |
1098 | ||
97f52eb4 SH |
1099 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1100 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1101 | { |
1102 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1103 | ((local_ca_guid == remote_ca_guid) && | |
1104 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1105 | } | |
1106 | ||
858119e1 | 1107 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1108 | struct ib_sa_path_rec *primary_path, |
1109 | struct ib_sa_path_rec *alt_path) | |
1110 | { | |
1111 | memset(primary_path, 0, sizeof *primary_path); | |
1112 | primary_path->dgid = req_msg->primary_local_gid; | |
1113 | primary_path->sgid = req_msg->primary_remote_gid; | |
1114 | primary_path->dlid = req_msg->primary_local_lid; | |
1115 | primary_path->slid = req_msg->primary_remote_lid; | |
1116 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1117 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1118 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1119 | primary_path->reversible = 1; | |
1120 | primary_path->pkey = req_msg->pkey; | |
1121 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1122 | primary_path->mtu_selector = IB_SA_EQ; | |
1123 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1124 | primary_path->rate_selector = IB_SA_EQ; | |
1125 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1126 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1127 | primary_path->packet_life_time = | |
1128 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1129 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1130 | ||
1131 | if (req_msg->alt_local_lid) { | |
1132 | memset(alt_path, 0, sizeof *alt_path); | |
1133 | alt_path->dgid = req_msg->alt_local_gid; | |
1134 | alt_path->sgid = req_msg->alt_remote_gid; | |
1135 | alt_path->dlid = req_msg->alt_local_lid; | |
1136 | alt_path->slid = req_msg->alt_remote_lid; | |
1137 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1138 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1139 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1140 | alt_path->reversible = 1; | |
1141 | alt_path->pkey = req_msg->pkey; | |
1142 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1143 | alt_path->mtu_selector = IB_SA_EQ; | |
1144 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1145 | alt_path->rate_selector = IB_SA_EQ; | |
1146 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1147 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1148 | alt_path->packet_life_time = | |
1149 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1150 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | static void cm_format_req_event(struct cm_work *work, | |
1155 | struct cm_id_private *cm_id_priv, | |
1156 | struct ib_cm_id *listen_id) | |
1157 | { | |
1158 | struct cm_req_msg *req_msg; | |
1159 | struct ib_cm_req_event_param *param; | |
1160 | ||
1161 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1162 | param = &work->cm_event.param.req_rcvd; | |
1163 | param->listen_id = listen_id; | |
a977049d HR |
1164 | param->port = cm_id_priv->av.port->port_num; |
1165 | param->primary_path = &work->path[0]; | |
1166 | if (req_msg->alt_local_lid) | |
1167 | param->alternate_path = &work->path[1]; | |
1168 | else | |
1169 | param->alternate_path = NULL; | |
1170 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1171 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1172 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1173 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1174 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1175 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1176 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1177 | param->local_cm_response_timeout = | |
1178 | cm_req_get_remote_resp_timeout(req_msg); | |
1179 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1180 | param->remote_cm_response_timeout = | |
1181 | cm_req_get_local_resp_timeout(req_msg); | |
1182 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1183 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1184 | param->srq = cm_req_get_srq(req_msg); | |
1185 | work->cm_event.private_data = &req_msg->private_data; | |
1186 | } | |
1187 | ||
1188 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1189 | struct cm_work *work) | |
1190 | { | |
a977049d HR |
1191 | int ret; |
1192 | ||
1193 | /* We will typically only have the current event to report. */ | |
1194 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1195 | cm_free_work(work); | |
1196 | ||
1197 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1198 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1199 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1200 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1201 | BUG_ON(!work); |
1202 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1203 | &work->cm_event); | |
1204 | cm_free_work(work); | |
1205 | } | |
1206 | cm_deref_id(cm_id_priv); | |
1207 | if (ret) | |
04c33543 | 1208 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1209 | } |
1210 | ||
1211 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1212 | struct cm_id_private *cm_id_priv, | |
1213 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1214 | const void *private_data, u8 private_data_len) | |
1215 | { | |
1216 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1217 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1218 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1219 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1220 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1221 | ||
1222 | if (private_data && private_data_len) | |
1223 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1224 | } | |
1225 | ||
1226 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1227 | struct cm_id_private *cm_id_priv, | |
1228 | enum ib_cm_rej_reason reason, | |
1229 | void *ari, | |
1230 | u8 ari_length, | |
1231 | const void *private_data, | |
1232 | u8 private_data_len) | |
1233 | { | |
1234 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1235 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1236 | ||
1237 | switch(cm_id_priv->id.state) { | |
1238 | case IB_CM_REQ_RCVD: | |
1239 | rej_msg->local_comm_id = 0; | |
1240 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1241 | break; | |
1242 | case IB_CM_MRA_REQ_SENT: | |
1243 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1244 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1245 | break; | |
1246 | case IB_CM_REP_RCVD: | |
1247 | case IB_CM_MRA_REP_SENT: | |
1248 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1249 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1250 | break; | |
1251 | default: | |
1252 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1253 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1254 | break; | |
1255 | } | |
1256 | ||
97f52eb4 | 1257 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1258 | if (ari && ari_length) { |
1259 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1260 | memcpy(rej_msg->ari, ari, ari_length); | |
1261 | } | |
1262 | ||
1263 | if (private_data && private_data_len) | |
1264 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1265 | } | |
1266 | ||
1267 | static void cm_dup_req_handler(struct cm_work *work, | |
1268 | struct cm_id_private *cm_id_priv) | |
1269 | { | |
1270 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1271 | int ret; |
1272 | ||
1273 | /* Quick state check to discard duplicate REQs. */ | |
1274 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1275 | return; | |
1276 | ||
1277 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1278 | if (ret) | |
1279 | return; | |
1280 | ||
24be6e81 | 1281 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1282 | switch (cm_id_priv->id.state) { |
1283 | case IB_CM_MRA_REQ_SENT: | |
1284 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1285 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1286 | cm_id_priv->private_data, | |
1287 | cm_id_priv->private_data_len); | |
1288 | break; | |
1289 | case IB_CM_TIMEWAIT: | |
1290 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1291 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1292 | break; | |
1293 | default: | |
1294 | goto unlock; | |
1295 | } | |
24be6e81 | 1296 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1297 | |
34816ad9 | 1298 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1299 | if (ret) |
1300 | goto free; | |
1301 | return; | |
1302 | ||
24be6e81 | 1303 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1304 | free: cm_free_msg(msg); |
1305 | } | |
1306 | ||
1307 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1308 | struct cm_id_private *cm_id_priv) | |
1309 | { | |
1310 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1311 | struct cm_timewait_info *timewait_info; | |
1312 | struct cm_req_msg *req_msg; | |
a977049d HR |
1313 | |
1314 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1315 | ||
d998ccce | 1316 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1317 | spin_lock_irq(&cm.lock); |
a977049d | 1318 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d HR |
1319 | if (timewait_info) { |
1320 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1321 | timewait_info->work.remote_id); | |
24be6e81 | 1322 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1323 | if (cur_cm_id_priv) { |
1324 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1325 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1326 | } |
1327 | return NULL; | |
1328 | } | |
1329 | ||
1330 | /* Check for stale connections. */ | |
1331 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1332 | if (timewait_info) { | |
1333 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
24be6e81 | 1334 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1335 | cm_issue_rej(work->port, work->mad_recv_wc, |
1336 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1337 | NULL, 0); | |
1338 | return NULL; | |
a977049d HR |
1339 | } |
1340 | ||
1341 | /* Find matching listen request. */ | |
07d357d0 | 1342 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1343 | req_msg->service_id, |
1344 | req_msg->private_data); | |
a977049d | 1345 | if (!listen_cm_id_priv) { |
8575329d | 1346 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
24be6e81 | 1347 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1348 | cm_issue_rej(work->port, work->mad_recv_wc, |
1349 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1350 | NULL, 0); | |
8575329d | 1351 | goto out; |
a977049d HR |
1352 | } |
1353 | atomic_inc(&listen_cm_id_priv->refcount); | |
1354 | atomic_inc(&cm_id_priv->refcount); | |
1355 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1356 | atomic_inc(&cm_id_priv->work_count); | |
24be6e81 | 1357 | spin_unlock_irq(&cm.lock); |
8575329d | 1358 | out: |
a977049d | 1359 | return listen_cm_id_priv; |
a977049d HR |
1360 | } |
1361 | ||
1362 | static int cm_req_handler(struct cm_work *work) | |
1363 | { | |
1364 | struct ib_cm_id *cm_id; | |
1365 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1366 | struct cm_req_msg *req_msg; | |
1367 | int ret; | |
1368 | ||
1369 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1370 | ||
07d357d0 | 1371 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
1372 | if (IS_ERR(cm_id)) |
1373 | return PTR_ERR(cm_id); | |
1374 | ||
1375 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1376 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1377 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1378 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1379 | &cm_id_priv->av); |
1380 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1381 | id.local_id); | |
1382 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1383 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1384 | goto destroy; |
a977049d HR |
1385 | } |
1386 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1387 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1388 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1389 | ||
1390 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1391 | if (!listen_cm_id_priv) { | |
1392 | ret = -EINVAL; | |
76842405 SH |
1393 | kfree(cm_id_priv->timewait_info); |
1394 | goto destroy; | |
a977049d HR |
1395 | } |
1396 | ||
1397 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1398 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1399 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1400 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1401 | |
1402 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); | |
1403 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
76842405 SH |
1404 | if (ret) { |
1405 | ib_get_cached_gid(work->port->cm_dev->device, | |
1406 | work->port->port_num, 0, &work->path[0].sgid); | |
1407 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1408 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1409 | NULL, 0); | |
1410 | goto rejected; | |
1411 | } | |
a977049d HR |
1412 | if (req_msg->alt_local_lid) { |
1413 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1414 | if (ret) { |
1415 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1416 | &work->path[0].sgid, | |
1417 | sizeof work->path[0].sgid, NULL, 0); | |
1418 | goto rejected; | |
1419 | } | |
a977049d HR |
1420 | } |
1421 | cm_id_priv->tid = req_msg->hdr.tid; | |
1422 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1423 | cm_req_get_local_resp_timeout(req_msg)); | |
1424 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1425 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1426 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1427 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1428 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
e1444b5a | 1429 | cm_id_priv->pkey = req_msg->pkey; |
a977049d | 1430 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
a977049d HR |
1431 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
1432 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1433 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1434 | |
1435 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1436 | cm_process_work(cm_id_priv, work); | |
1437 | cm_deref_id(listen_cm_id_priv); | |
1438 | return 0; | |
1439 | ||
76842405 SH |
1440 | rejected: |
1441 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1442 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1443 | destroy: |
1444 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1445 | return ret; |
1446 | } | |
1447 | ||
1448 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1449 | struct cm_id_private *cm_id_priv, | |
1450 | struct ib_cm_rep_param *param) | |
1451 | { | |
1452 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1453 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1454 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1455 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1456 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1457 | rep_msg->resp_resources = param->responder_resources; | |
1458 | rep_msg->initiator_depth = param->initiator_depth; | |
1d846126 SH |
1459 | cm_rep_set_target_ack_delay(rep_msg, |
1460 | cm_id_priv->av.port->cm_dev->ack_delay); | |
a977049d HR |
1461 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
1462 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1463 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1464 | cm_rep_set_srq(rep_msg, param->srq); | |
e971b8cd | 1465 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d HR |
1466 | |
1467 | if (param->private_data && param->private_data_len) | |
1468 | memcpy(rep_msg->private_data, param->private_data, | |
1469 | param->private_data_len); | |
1470 | } | |
1471 | ||
1472 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1473 | struct ib_cm_rep_param *param) | |
1474 | { | |
1475 | struct cm_id_private *cm_id_priv; | |
1476 | struct ib_mad_send_buf *msg; | |
1477 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1478 | unsigned long flags; |
1479 | int ret; | |
1480 | ||
1481 | if (param->private_data && | |
1482 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1483 | return -EINVAL; | |
1484 | ||
1485 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1486 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1487 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1488 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1489 | ret = -EINVAL; | |
1490 | goto out; | |
1491 | } | |
1492 | ||
1493 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1494 | if (ret) | |
1495 | goto out; | |
1496 | ||
1497 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1498 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1499 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1500 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1501 | ||
34816ad9 | 1502 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1503 | if (ret) { |
1504 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1505 | cm_free_msg(msg); | |
1506 | return ret; | |
1507 | } | |
1508 | ||
1509 | cm_id->state = IB_CM_REP_SENT; | |
1510 | cm_id_priv->msg = msg; | |
1511 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1512 | cm_id_priv->responder_resources = param->responder_resources; | |
1513 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1514 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1515 | ||
1516 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1517 | return ret; | |
1518 | } | |
1519 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1520 | ||
1521 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1522 | struct cm_id_private *cm_id_priv, | |
1523 | const void *private_data, | |
1524 | u8 private_data_len) | |
1525 | { | |
1526 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1527 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1528 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1529 | ||
1530 | if (private_data && private_data_len) | |
1531 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1532 | } | |
1533 | ||
1534 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1535 | const void *private_data, | |
1536 | u8 private_data_len) | |
1537 | { | |
1538 | struct cm_id_private *cm_id_priv; | |
1539 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1540 | unsigned long flags; |
1541 | void *data; | |
1542 | int ret; | |
1543 | ||
1544 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1545 | return -EINVAL; | |
1546 | ||
1547 | data = cm_copy_private_data(private_data, private_data_len); | |
1548 | if (IS_ERR(data)) | |
1549 | return PTR_ERR(data); | |
1550 | ||
1551 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1552 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1553 | if (cm_id->state != IB_CM_REP_RCVD && | |
1554 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1555 | ret = -EINVAL; | |
1556 | goto error; | |
1557 | } | |
1558 | ||
1559 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1560 | if (ret) | |
1561 | goto error; | |
1562 | ||
1563 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1564 | private_data, private_data_len); | |
1565 | ||
34816ad9 | 1566 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1567 | if (ret) { |
1568 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1569 | cm_free_msg(msg); | |
1570 | kfree(data); | |
1571 | return ret; | |
1572 | } | |
1573 | ||
1574 | cm_id->state = IB_CM_ESTABLISHED; | |
1575 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1576 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1577 | return 0; | |
1578 | ||
1579 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1580 | kfree(data); | |
1581 | return ret; | |
1582 | } | |
1583 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1584 | ||
1585 | static void cm_format_rep_event(struct cm_work *work) | |
1586 | { | |
1587 | struct cm_rep_msg *rep_msg; | |
1588 | struct ib_cm_rep_event_param *param; | |
1589 | ||
1590 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1591 | param = &work->cm_event.param.rep_rcvd; | |
1592 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1593 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1594 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1595 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1596 | param->responder_resources = rep_msg->initiator_depth; | |
1597 | param->initiator_depth = rep_msg->resp_resources; | |
1598 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1599 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1600 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1601 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1602 | param->srq = cm_rep_get_srq(rep_msg); | |
1603 | work->cm_event.private_data = &rep_msg->private_data; | |
1604 | } | |
1605 | ||
1606 | static void cm_dup_rep_handler(struct cm_work *work) | |
1607 | { | |
1608 | struct cm_id_private *cm_id_priv; | |
1609 | struct cm_rep_msg *rep_msg; | |
1610 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1611 | int ret; |
1612 | ||
1613 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1614 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1615 | rep_msg->local_comm_id); | |
1616 | if (!cm_id_priv) | |
1617 | return; | |
1618 | ||
1619 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1620 | if (ret) | |
1621 | goto deref; | |
1622 | ||
24be6e81 | 1623 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1624 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
1625 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1626 | cm_id_priv->private_data, | |
1627 | cm_id_priv->private_data_len); | |
1628 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1629 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1630 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1631 | cm_id_priv->private_data, | |
1632 | cm_id_priv->private_data_len); | |
1633 | else | |
1634 | goto unlock; | |
24be6e81 | 1635 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1636 | |
34816ad9 | 1637 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1638 | if (ret) |
1639 | goto free; | |
1640 | goto deref; | |
1641 | ||
24be6e81 | 1642 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1643 | free: cm_free_msg(msg); |
1644 | deref: cm_deref_id(cm_id_priv); | |
1645 | } | |
1646 | ||
1647 | static int cm_rep_handler(struct cm_work *work) | |
1648 | { | |
1649 | struct cm_id_private *cm_id_priv; | |
1650 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1651 | int ret; |
1652 | ||
1653 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1654 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1655 | if (!cm_id_priv) { | |
1656 | cm_dup_rep_handler(work); | |
1657 | return -EINVAL; | |
1658 | } | |
1659 | ||
87fd1a11 SH |
1660 | cm_format_rep_event(work); |
1661 | ||
24be6e81 | 1662 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1663 | switch (cm_id_priv->id.state) { |
1664 | case IB_CM_REQ_SENT: | |
1665 | case IB_CM_MRA_REQ_RCVD: | |
1666 | break; | |
1667 | default: | |
24be6e81 | 1668 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1669 | ret = -EINVAL; |
1670 | goto error; | |
1671 | } | |
1672 | ||
a977049d HR |
1673 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1674 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1675 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1676 | ||
87fd1a11 | 1677 | spin_lock(&cm.lock); |
a977049d HR |
1678 | /* Check for duplicate REP. */ |
1679 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 1680 | spin_unlock(&cm.lock); |
24be6e81 | 1681 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1682 | ret = -EINVAL; |
1683 | goto error; | |
1684 | } | |
1685 | /* Check for a stale connection. */ | |
1686 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1687 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1688 | &cm.remote_id_table); | |
1689 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1690 | spin_unlock(&cm.lock); | |
24be6e81 | 1691 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1692 | cm_issue_rej(work->port, work->mad_recv_wc, |
1693 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1694 | NULL, 0); | |
1695 | ret = -EINVAL; | |
1696 | goto error; | |
1697 | } | |
87fd1a11 | 1698 | spin_unlock(&cm.lock); |
a977049d | 1699 | |
a977049d HR |
1700 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1701 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1702 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1703 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1704 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1705 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1706 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1d846126 SH |
1707 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
1708 | cm_id_priv->av.timeout = | |
1709 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1710 | cm_id_priv->av.timeout - 1); | |
1711 | cm_id_priv->alt_av.timeout = | |
1712 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1713 | cm_id_priv->alt_av.timeout - 1); | |
a977049d HR |
1714 | |
1715 | /* todo: handle peer_to_peer */ | |
1716 | ||
34816ad9 | 1717 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1718 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1719 | if (!ret) | |
1720 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1721 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1722 | |
1723 | if (ret) | |
1724 | cm_process_work(cm_id_priv, work); | |
1725 | else | |
1726 | cm_deref_id(cm_id_priv); | |
1727 | return 0; | |
1728 | ||
87fd1a11 | 1729 | error: |
a977049d HR |
1730 | cm_deref_id(cm_id_priv); |
1731 | return ret; | |
1732 | } | |
1733 | ||
1734 | static int cm_establish_handler(struct cm_work *work) | |
1735 | { | |
1736 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1737 | int ret; |
1738 | ||
e1444b5a | 1739 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
1740 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
1741 | if (!cm_id_priv) | |
1742 | return -EINVAL; | |
1743 | ||
24be6e81 | 1744 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1745 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 1746 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1747 | goto out; |
1748 | } | |
1749 | ||
34816ad9 | 1750 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1751 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1752 | if (!ret) | |
1753 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1754 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1755 | |
1756 | if (ret) | |
1757 | cm_process_work(cm_id_priv, work); | |
1758 | else | |
1759 | cm_deref_id(cm_id_priv); | |
1760 | return 0; | |
1761 | out: | |
1762 | cm_deref_id(cm_id_priv); | |
1763 | return -EINVAL; | |
1764 | } | |
1765 | ||
1766 | static int cm_rtu_handler(struct cm_work *work) | |
1767 | { | |
1768 | struct cm_id_private *cm_id_priv; | |
1769 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
1770 | int ret; |
1771 | ||
1772 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1773 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1774 | rtu_msg->local_comm_id); | |
1775 | if (!cm_id_priv) | |
1776 | return -EINVAL; | |
1777 | ||
1778 | work->cm_event.private_data = &rtu_msg->private_data; | |
1779 | ||
24be6e81 | 1780 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1781 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
1782 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 1783 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1784 | goto out; |
1785 | } | |
1786 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1787 | ||
34816ad9 | 1788 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1789 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1790 | if (!ret) | |
1791 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1792 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1793 | |
1794 | if (ret) | |
1795 | cm_process_work(cm_id_priv, work); | |
1796 | else | |
1797 | cm_deref_id(cm_id_priv); | |
1798 | return 0; | |
1799 | out: | |
1800 | cm_deref_id(cm_id_priv); | |
1801 | return -EINVAL; | |
1802 | } | |
1803 | ||
1804 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1805 | struct cm_id_private *cm_id_priv, | |
1806 | const void *private_data, | |
1807 | u8 private_data_len) | |
1808 | { | |
1809 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1810 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1811 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1812 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1813 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1814 | ||
1815 | if (private_data && private_data_len) | |
1816 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1817 | } | |
1818 | ||
1819 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1820 | const void *private_data, | |
1821 | u8 private_data_len) | |
1822 | { | |
1823 | struct cm_id_private *cm_id_priv; | |
1824 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1825 | unsigned long flags; |
1826 | int ret; | |
1827 | ||
1828 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1829 | return -EINVAL; | |
1830 | ||
1831 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1832 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1833 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1834 | ret = -EINVAL; | |
1835 | goto out; | |
1836 | } | |
1837 | ||
1838 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1839 | if (ret) { | |
1840 | cm_enter_timewait(cm_id_priv); | |
1841 | goto out; | |
1842 | } | |
1843 | ||
1844 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1845 | private_data, private_data_len); | |
34816ad9 | 1846 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1847 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
1848 | ||
34816ad9 | 1849 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1850 | if (ret) { |
1851 | cm_enter_timewait(cm_id_priv); | |
1852 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1853 | cm_free_msg(msg); | |
1854 | return ret; | |
1855 | } | |
1856 | ||
1857 | cm_id->state = IB_CM_DREQ_SENT; | |
1858 | cm_id_priv->msg = msg; | |
1859 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1860 | return ret; | |
1861 | } | |
1862 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1863 | ||
1864 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1865 | struct cm_id_private *cm_id_priv, | |
1866 | const void *private_data, | |
1867 | u8 private_data_len) | |
1868 | { | |
1869 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1870 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1871 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1872 | ||
1873 | if (private_data && private_data_len) | |
1874 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
1875 | } | |
1876 | ||
1877 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
1878 | const void *private_data, | |
1879 | u8 private_data_len) | |
1880 | { | |
1881 | struct cm_id_private *cm_id_priv; | |
1882 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1883 | unsigned long flags; |
1884 | void *data; | |
1885 | int ret; | |
1886 | ||
1887 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
1888 | return -EINVAL; | |
1889 | ||
1890 | data = cm_copy_private_data(private_data, private_data_len); | |
1891 | if (IS_ERR(data)) | |
1892 | return PTR_ERR(data); | |
1893 | ||
1894 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1895 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1896 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
1897 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1898 | kfree(data); | |
1899 | return -EINVAL; | |
1900 | } | |
1901 | ||
1902 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1903 | cm_enter_timewait(cm_id_priv); | |
1904 | ||
1905 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1906 | if (ret) | |
1907 | goto out; | |
1908 | ||
1909 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1910 | private_data, private_data_len); | |
1911 | ||
34816ad9 | 1912 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1913 | if (ret) { |
1914 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1915 | cm_free_msg(msg); | |
1916 | return ret; | |
1917 | } | |
1918 | ||
1919 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1920 | return ret; | |
1921 | } | |
1922 | EXPORT_SYMBOL(ib_send_cm_drep); | |
1923 | ||
82a9c16a SH |
1924 | static int cm_issue_drep(struct cm_port *port, |
1925 | struct ib_mad_recv_wc *mad_recv_wc) | |
1926 | { | |
1927 | struct ib_mad_send_buf *msg = NULL; | |
1928 | struct cm_dreq_msg *dreq_msg; | |
1929 | struct cm_drep_msg *drep_msg; | |
1930 | int ret; | |
1931 | ||
1932 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1933 | if (ret) | |
1934 | return ret; | |
1935 | ||
1936 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
1937 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
1938 | ||
1939 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
1940 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
1941 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
1942 | ||
1943 | ret = ib_post_send_mad(msg, NULL); | |
1944 | if (ret) | |
1945 | cm_free_msg(msg); | |
1946 | ||
1947 | return ret; | |
1948 | } | |
1949 | ||
a977049d HR |
1950 | static int cm_dreq_handler(struct cm_work *work) |
1951 | { | |
1952 | struct cm_id_private *cm_id_priv; | |
1953 | struct cm_dreq_msg *dreq_msg; | |
1954 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1955 | int ret; |
1956 | ||
1957 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
1958 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
1959 | dreq_msg->local_comm_id); | |
82a9c16a SH |
1960 | if (!cm_id_priv) { |
1961 | cm_issue_drep(work->port, work->mad_recv_wc); | |
a977049d | 1962 | return -EINVAL; |
82a9c16a | 1963 | } |
a977049d HR |
1964 | |
1965 | work->cm_event.private_data = &dreq_msg->private_data; | |
1966 | ||
24be6e81 | 1967 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1968 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
1969 | goto unlock; | |
1970 | ||
1971 | switch (cm_id_priv->id.state) { | |
1972 | case IB_CM_REP_SENT: | |
1973 | case IB_CM_DREQ_SENT: | |
34816ad9 | 1974 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1975 | break; |
1976 | case IB_CM_ESTABLISHED: | |
1977 | case IB_CM_MRA_REP_RCVD: | |
1978 | break; | |
1979 | case IB_CM_TIMEWAIT: | |
1980 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
1981 | goto unlock; | |
1982 | ||
1983 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1984 | cm_id_priv->private_data, | |
1985 | cm_id_priv->private_data_len); | |
24be6e81 | 1986 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1987 | |
34816ad9 | 1988 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
1989 | cm_free_msg(msg); |
1990 | goto deref; | |
1991 | default: | |
1992 | goto unlock; | |
1993 | } | |
1994 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
1995 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
1996 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1997 | if (!ret) | |
1998 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1999 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2000 | |
2001 | if (ret) | |
2002 | cm_process_work(cm_id_priv, work); | |
2003 | else | |
2004 | cm_deref_id(cm_id_priv); | |
2005 | return 0; | |
2006 | ||
24be6e81 | 2007 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2008 | deref: cm_deref_id(cm_id_priv); |
2009 | return -EINVAL; | |
2010 | } | |
2011 | ||
2012 | static int cm_drep_handler(struct cm_work *work) | |
2013 | { | |
2014 | struct cm_id_private *cm_id_priv; | |
2015 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2016 | int ret; |
2017 | ||
2018 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2019 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2020 | drep_msg->local_comm_id); | |
2021 | if (!cm_id_priv) | |
2022 | return -EINVAL; | |
2023 | ||
2024 | work->cm_event.private_data = &drep_msg->private_data; | |
2025 | ||
24be6e81 | 2026 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2027 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2028 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2029 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2030 | goto out; |
2031 | } | |
2032 | cm_enter_timewait(cm_id_priv); | |
2033 | ||
34816ad9 | 2034 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2035 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2036 | if (!ret) | |
2037 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2038 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2039 | |
2040 | if (ret) | |
2041 | cm_process_work(cm_id_priv, work); | |
2042 | else | |
2043 | cm_deref_id(cm_id_priv); | |
2044 | return 0; | |
2045 | out: | |
2046 | cm_deref_id(cm_id_priv); | |
2047 | return -EINVAL; | |
2048 | } | |
2049 | ||
2050 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2051 | enum ib_cm_rej_reason reason, | |
2052 | void *ari, | |
2053 | u8 ari_length, | |
2054 | const void *private_data, | |
2055 | u8 private_data_len) | |
2056 | { | |
2057 | struct cm_id_private *cm_id_priv; | |
2058 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2059 | unsigned long flags; |
2060 | int ret; | |
2061 | ||
2062 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2063 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2064 | return -EINVAL; | |
2065 | ||
2066 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2067 | ||
2068 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2069 | switch (cm_id->state) { | |
2070 | case IB_CM_REQ_SENT: | |
2071 | case IB_CM_MRA_REQ_RCVD: | |
2072 | case IB_CM_REQ_RCVD: | |
2073 | case IB_CM_MRA_REQ_SENT: | |
2074 | case IB_CM_REP_RCVD: | |
2075 | case IB_CM_MRA_REP_SENT: | |
2076 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2077 | if (!ret) | |
2078 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2079 | cm_id_priv, reason, ari, ari_length, | |
2080 | private_data, private_data_len); | |
2081 | ||
2082 | cm_reset_to_idle(cm_id_priv); | |
2083 | break; | |
2084 | case IB_CM_REP_SENT: | |
2085 | case IB_CM_MRA_REP_RCVD: | |
2086 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2087 | if (!ret) | |
2088 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2089 | cm_id_priv, reason, ari, ari_length, | |
2090 | private_data, private_data_len); | |
2091 | ||
2092 | cm_enter_timewait(cm_id_priv); | |
2093 | break; | |
2094 | default: | |
2095 | ret = -EINVAL; | |
2096 | goto out; | |
2097 | } | |
2098 | ||
2099 | if (ret) | |
2100 | goto out; | |
2101 | ||
34816ad9 | 2102 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2103 | if (ret) |
2104 | cm_free_msg(msg); | |
2105 | ||
2106 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2107 | return ret; | |
2108 | } | |
2109 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2110 | ||
2111 | static void cm_format_rej_event(struct cm_work *work) | |
2112 | { | |
2113 | struct cm_rej_msg *rej_msg; | |
2114 | struct ib_cm_rej_event_param *param; | |
2115 | ||
2116 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2117 | param = &work->cm_event.param.rej_rcvd; | |
2118 | param->ari = rej_msg->ari; | |
2119 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2120 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2121 | work->cm_event.private_data = &rej_msg->private_data; |
2122 | } | |
2123 | ||
2124 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2125 | { | |
2126 | struct cm_timewait_info *timewait_info; | |
2127 | struct cm_id_private *cm_id_priv; | |
97f52eb4 | 2128 | __be32 remote_id; |
a977049d HR |
2129 | |
2130 | remote_id = rej_msg->local_comm_id; | |
2131 | ||
97f52eb4 | 2132 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
24be6e81 | 2133 | spin_lock_irq(&cm.lock); |
97f52eb4 | 2134 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2135 | remote_id); |
2136 | if (!timewait_info) { | |
24be6e81 | 2137 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2138 | return NULL; |
2139 | } | |
f06d2653 SH |
2140 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2141 | (timewait_info->work.local_id ^ | |
2142 | cm.random_id_operand)); | |
a977049d HR |
2143 | if (cm_id_priv) { |
2144 | if (cm_id_priv->id.remote_id == remote_id) | |
2145 | atomic_inc(&cm_id_priv->refcount); | |
2146 | else | |
2147 | cm_id_priv = NULL; | |
2148 | } | |
24be6e81 | 2149 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2150 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
2151 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2152 | else | |
2153 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2154 | ||
2155 | return cm_id_priv; | |
2156 | } | |
2157 | ||
2158 | static int cm_rej_handler(struct cm_work *work) | |
2159 | { | |
2160 | struct cm_id_private *cm_id_priv; | |
2161 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
2162 | int ret; |
2163 | ||
2164 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2165 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2166 | if (!cm_id_priv) | |
2167 | return -EINVAL; | |
2168 | ||
2169 | cm_format_rej_event(work); | |
2170 | ||
24be6e81 | 2171 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2172 | switch (cm_id_priv->id.state) { |
2173 | case IB_CM_REQ_SENT: | |
2174 | case IB_CM_MRA_REQ_RCVD: | |
2175 | case IB_CM_REP_SENT: | |
2176 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2177 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2178 | /* fall through */ |
2179 | case IB_CM_REQ_RCVD: | |
2180 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2181 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2182 | cm_enter_timewait(cm_id_priv); |
2183 | else | |
2184 | cm_reset_to_idle(cm_id_priv); | |
2185 | break; | |
2186 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2187 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2188 | /* fall through */ |
2189 | case IB_CM_REP_RCVD: | |
2190 | case IB_CM_MRA_REP_SENT: | |
2191 | case IB_CM_ESTABLISHED: | |
2192 | cm_enter_timewait(cm_id_priv); | |
2193 | break; | |
2194 | default: | |
24be6e81 | 2195 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2196 | ret = -EINVAL; |
2197 | goto out; | |
2198 | } | |
2199 | ||
2200 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2201 | if (!ret) | |
2202 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2203 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2204 | |
2205 | if (ret) | |
2206 | cm_process_work(cm_id_priv, work); | |
2207 | else | |
2208 | cm_deref_id(cm_id_priv); | |
2209 | return 0; | |
2210 | out: | |
2211 | cm_deref_id(cm_id_priv); | |
2212 | return -EINVAL; | |
2213 | } | |
2214 | ||
2215 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2216 | u8 service_timeout, | |
2217 | const void *private_data, | |
2218 | u8 private_data_len) | |
2219 | { | |
2220 | struct cm_id_private *cm_id_priv; | |
2221 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2222 | void *data; |
2223 | unsigned long flags; | |
2224 | int ret; | |
2225 | ||
2226 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2227 | return -EINVAL; | |
2228 | ||
2229 | data = cm_copy_private_data(private_data, private_data_len); | |
2230 | if (IS_ERR(data)) | |
2231 | return PTR_ERR(data); | |
2232 | ||
2233 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2234 | ||
2235 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2236 | switch(cm_id_priv->id.state) { | |
2237 | case IB_CM_REQ_RCVD: | |
2238 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2239 | if (ret) | |
2240 | goto error1; | |
2241 | ||
2242 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2243 | CM_MSG_RESPONSE_REQ, service_timeout, | |
2244 | private_data, private_data_len); | |
34816ad9 | 2245 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2246 | if (ret) |
2247 | goto error2; | |
2248 | cm_id->state = IB_CM_MRA_REQ_SENT; | |
2249 | break; | |
2250 | case IB_CM_REP_RCVD: | |
2251 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2252 | if (ret) | |
2253 | goto error1; | |
2254 | ||
2255 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2256 | CM_MSG_RESPONSE_REP, service_timeout, | |
2257 | private_data, private_data_len); | |
34816ad9 | 2258 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2259 | if (ret) |
2260 | goto error2; | |
2261 | cm_id->state = IB_CM_MRA_REP_SENT; | |
2262 | break; | |
2263 | case IB_CM_ESTABLISHED: | |
2264 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2265 | if (ret) | |
2266 | goto error1; | |
2267 | ||
2268 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2269 | CM_MSG_RESPONSE_OTHER, service_timeout, | |
2270 | private_data, private_data_len); | |
34816ad9 | 2271 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2272 | if (ret) |
2273 | goto error2; | |
2274 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; | |
2275 | break; | |
2276 | default: | |
2277 | ret = -EINVAL; | |
2278 | goto error1; | |
2279 | } | |
2280 | cm_id_priv->service_timeout = service_timeout; | |
2281 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2282 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2283 | return 0; | |
2284 | ||
2285 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2286 | kfree(data); | |
2287 | return ret; | |
2288 | ||
2289 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2290 | kfree(data); | |
2291 | cm_free_msg(msg); | |
2292 | return ret; | |
2293 | } | |
2294 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2295 | ||
2296 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2297 | { | |
2298 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2299 | case CM_MSG_RESPONSE_REQ: | |
2300 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2301 | case CM_MSG_RESPONSE_REP: | |
2302 | case CM_MSG_RESPONSE_OTHER: | |
2303 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2304 | mra_msg->local_comm_id); | |
2305 | default: | |
2306 | return NULL; | |
2307 | } | |
2308 | } | |
2309 | ||
2310 | static int cm_mra_handler(struct cm_work *work) | |
2311 | { | |
2312 | struct cm_id_private *cm_id_priv; | |
2313 | struct cm_mra_msg *mra_msg; | |
a977049d HR |
2314 | int timeout, ret; |
2315 | ||
2316 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2317 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2318 | if (!cm_id_priv) | |
2319 | return -EINVAL; | |
2320 | ||
2321 | work->cm_event.private_data = &mra_msg->private_data; | |
2322 | work->cm_event.param.mra_rcvd.service_timeout = | |
2323 | cm_mra_get_service_timeout(mra_msg); | |
2324 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
1d846126 | 2325 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 2326 | |
24be6e81 | 2327 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2328 | switch (cm_id_priv->id.state) { |
2329 | case IB_CM_REQ_SENT: | |
2330 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2331 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2332 | cm_id_priv->msg, timeout)) |
a977049d HR |
2333 | goto out; |
2334 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2335 | break; | |
2336 | case IB_CM_REP_SENT: | |
2337 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2338 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2339 | cm_id_priv->msg, timeout)) |
a977049d HR |
2340 | goto out; |
2341 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2342 | break; | |
2343 | case IB_CM_ESTABLISHED: | |
2344 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2345 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2346 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2347 | cm_id_priv->msg, timeout)) |
a977049d HR |
2348 | goto out; |
2349 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; | |
2350 | break; | |
2351 | default: | |
2352 | goto out; | |
2353 | } | |
2354 | ||
2355 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2356 | cm_id_priv->id.state; | |
2357 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2358 | if (!ret) | |
2359 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2360 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2361 | |
2362 | if (ret) | |
2363 | cm_process_work(cm_id_priv, work); | |
2364 | else | |
2365 | cm_deref_id(cm_id_priv); | |
2366 | return 0; | |
2367 | out: | |
24be6e81 | 2368 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2369 | cm_deref_id(cm_id_priv); |
2370 | return -EINVAL; | |
2371 | } | |
2372 | ||
2373 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2374 | struct cm_id_private *cm_id_priv, | |
2375 | struct ib_sa_path_rec *alternate_path, | |
2376 | const void *private_data, | |
2377 | u8 private_data_len) | |
2378 | { | |
2379 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2380 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2381 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2382 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2383 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2384 | /* todo: need remote CM response timeout */ | |
2385 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2386 | lap_msg->alt_local_lid = alternate_path->slid; | |
2387 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2388 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2389 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2390 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2391 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2392 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2393 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2394 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2395 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2396 | cm_lap_set_local_ack_timeout(lap_msg, | |
1d846126 SH |
2397 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
2398 | alternate_path->packet_life_time)); | |
a977049d HR |
2399 | |
2400 | if (private_data && private_data_len) | |
2401 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2402 | } | |
2403 | ||
2404 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2405 | struct ib_sa_path_rec *alternate_path, | |
2406 | const void *private_data, | |
2407 | u8 private_data_len) | |
2408 | { | |
2409 | struct cm_id_private *cm_id_priv; | |
2410 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2411 | unsigned long flags; |
2412 | int ret; | |
2413 | ||
2414 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2415 | return -EINVAL; | |
2416 | ||
2417 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2418 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2419 | if (cm_id->state != IB_CM_ESTABLISHED || | |
e1444b5a SH |
2420 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
2421 | cm_id->lap_state != IB_CM_LAP_IDLE)) { | |
a977049d HR |
2422 | ret = -EINVAL; |
2423 | goto out; | |
2424 | } | |
2425 | ||
e1444b5a SH |
2426 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
2427 | if (ret) | |
2428 | goto out; | |
1d846126 SH |
2429 | cm_id_priv->alt_av.timeout = |
2430 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2431 | cm_id_priv->alt_av.timeout - 1); | |
e1444b5a | 2432 | |
a977049d HR |
2433 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2434 | if (ret) | |
2435 | goto out; | |
2436 | ||
2437 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2438 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2439 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2440 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2441 | ||
34816ad9 | 2442 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2443 | if (ret) { |
2444 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2445 | cm_free_msg(msg); | |
2446 | return ret; | |
2447 | } | |
2448 | ||
2449 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2450 | cm_id_priv->msg = msg; | |
2451 | ||
2452 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2453 | return ret; | |
2454 | } | |
2455 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2456 | ||
e1444b5a SH |
2457 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
2458 | struct ib_sa_path_rec *path, | |
a977049d HR |
2459 | struct cm_lap_msg *lap_msg) |
2460 | { | |
2461 | memset(path, 0, sizeof *path); | |
2462 | path->dgid = lap_msg->alt_local_gid; | |
2463 | path->sgid = lap_msg->alt_remote_gid; | |
2464 | path->dlid = lap_msg->alt_local_lid; | |
2465 | path->slid = lap_msg->alt_remote_lid; | |
2466 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2467 | path->hop_limit = lap_msg->alt_hop_limit; | |
2468 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2469 | path->reversible = 1; | |
e1444b5a | 2470 | path->pkey = cm_id_priv->pkey; |
a977049d HR |
2471 | path->sl = cm_lap_get_sl(lap_msg); |
2472 | path->mtu_selector = IB_SA_EQ; | |
e1444b5a | 2473 | path->mtu = cm_id_priv->path_mtu; |
a977049d HR |
2474 | path->rate_selector = IB_SA_EQ; |
2475 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2476 | path->packet_life_time_selector = IB_SA_EQ; | |
2477 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2478 | path->packet_life_time -= (path->packet_life_time > 0); | |
2479 | } | |
2480 | ||
2481 | static int cm_lap_handler(struct cm_work *work) | |
2482 | { | |
2483 | struct cm_id_private *cm_id_priv; | |
2484 | struct cm_lap_msg *lap_msg; | |
2485 | struct ib_cm_lap_event_param *param; | |
2486 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2487 | int ret; |
2488 | ||
2489 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2490 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2491 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2492 | lap_msg->local_comm_id); | |
2493 | if (!cm_id_priv) | |
2494 | return -EINVAL; | |
2495 | ||
2496 | param = &work->cm_event.param.lap_rcvd; | |
2497 | param->alternate_path = &work->path[0]; | |
e1444b5a | 2498 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
a977049d HR |
2499 | work->cm_event.private_data = &lap_msg->private_data; |
2500 | ||
24be6e81 | 2501 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2502 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
2503 | goto unlock; | |
2504 | ||
2505 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 2506 | case IB_CM_LAP_UNINIT: |
a977049d HR |
2507 | case IB_CM_LAP_IDLE: |
2508 | break; | |
2509 | case IB_CM_MRA_LAP_SENT: | |
2510 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
2511 | goto unlock; | |
2512 | ||
2513 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2514 | CM_MSG_RESPONSE_OTHER, | |
2515 | cm_id_priv->service_timeout, | |
2516 | cm_id_priv->private_data, | |
2517 | cm_id_priv->private_data_len); | |
24be6e81 | 2518 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2519 | |
34816ad9 | 2520 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2521 | cm_free_msg(msg); |
2522 | goto deref; | |
2523 | default: | |
2524 | goto unlock; | |
2525 | } | |
2526 | ||
2527 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2528 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e1444b5a SH |
2529 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2530 | work->mad_recv_wc->recv_buf.grh, | |
2531 | &cm_id_priv->av); | |
2532 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); | |
a977049d HR |
2533 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2534 | if (!ret) | |
2535 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2536 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2537 | |
2538 | if (ret) | |
2539 | cm_process_work(cm_id_priv, work); | |
2540 | else | |
2541 | cm_deref_id(cm_id_priv); | |
2542 | return 0; | |
2543 | ||
24be6e81 | 2544 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2545 | deref: cm_deref_id(cm_id_priv); |
2546 | return -EINVAL; | |
2547 | } | |
2548 | ||
2549 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2550 | struct cm_id_private *cm_id_priv, | |
2551 | enum ib_cm_apr_status status, | |
2552 | void *info, | |
2553 | u8 info_length, | |
2554 | const void *private_data, | |
2555 | u8 private_data_len) | |
2556 | { | |
2557 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2558 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2559 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2560 | apr_msg->ap_status = (u8) status; | |
2561 | ||
2562 | if (info && info_length) { | |
2563 | apr_msg->info_length = info_length; | |
2564 | memcpy(apr_msg->info, info, info_length); | |
2565 | } | |
2566 | ||
2567 | if (private_data && private_data_len) | |
2568 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2569 | } | |
2570 | ||
2571 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2572 | enum ib_cm_apr_status status, | |
2573 | void *info, | |
2574 | u8 info_length, | |
2575 | const void *private_data, | |
2576 | u8 private_data_len) | |
2577 | { | |
2578 | struct cm_id_private *cm_id_priv; | |
2579 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2580 | unsigned long flags; |
2581 | int ret; | |
2582 | ||
2583 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2584 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2585 | return -EINVAL; | |
2586 | ||
2587 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2588 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2589 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2590 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2591 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2592 | ret = -EINVAL; | |
2593 | goto out; | |
2594 | } | |
2595 | ||
2596 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2597 | if (ret) | |
2598 | goto out; | |
2599 | ||
2600 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2601 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2602 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2603 | if (ret) { |
2604 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2605 | cm_free_msg(msg); | |
2606 | return ret; | |
2607 | } | |
2608 | ||
2609 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2610 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2611 | return ret; | |
2612 | } | |
2613 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2614 | ||
2615 | static int cm_apr_handler(struct cm_work *work) | |
2616 | { | |
2617 | struct cm_id_private *cm_id_priv; | |
2618 | struct cm_apr_msg *apr_msg; | |
a977049d HR |
2619 | int ret; |
2620 | ||
2621 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2622 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2623 | apr_msg->local_comm_id); | |
2624 | if (!cm_id_priv) | |
2625 | return -EINVAL; /* Unmatched reply. */ | |
2626 | ||
2627 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2628 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2629 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2630 | work->cm_event.private_data = &apr_msg->private_data; | |
2631 | ||
24be6e81 | 2632 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2633 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
2634 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2635 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 2636 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2637 | goto out; |
2638 | } | |
2639 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2640 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2641 | cm_id_priv->msg = NULL; |
2642 | ||
2643 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2644 | if (!ret) | |
2645 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2646 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2647 | |
2648 | if (ret) | |
2649 | cm_process_work(cm_id_priv, work); | |
2650 | else | |
2651 | cm_deref_id(cm_id_priv); | |
2652 | return 0; | |
2653 | out: | |
2654 | cm_deref_id(cm_id_priv); | |
2655 | return -EINVAL; | |
2656 | } | |
2657 | ||
2658 | static int cm_timewait_handler(struct cm_work *work) | |
2659 | { | |
2660 | struct cm_timewait_info *timewait_info; | |
2661 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2662 | int ret; |
2663 | ||
2664 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2665 | spin_lock_irq(&cm.lock); |
2666 | list_del(&timewait_info->list); | |
2667 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2668 | |
2669 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2670 | timewait_info->work.remote_id); | |
2671 | if (!cm_id_priv) | |
2672 | return -EINVAL; | |
2673 | ||
8575329d | 2674 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2675 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2676 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2677 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2678 | goto out; |
2679 | } | |
2680 | cm_id_priv->id.state = IB_CM_IDLE; | |
2681 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2682 | if (!ret) | |
2683 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2684 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2685 | |
2686 | if (ret) | |
2687 | cm_process_work(cm_id_priv, work); | |
2688 | else | |
2689 | cm_deref_id(cm_id_priv); | |
2690 | return 0; | |
2691 | out: | |
2692 | cm_deref_id(cm_id_priv); | |
2693 | return -EINVAL; | |
2694 | } | |
2695 | ||
2696 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2697 | struct cm_id_private *cm_id_priv, | |
2698 | struct ib_cm_sidr_req_param *param) | |
2699 | { | |
2700 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2701 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2702 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
75af9088 | 2703 | sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
a977049d HR |
2704 | sidr_req_msg->service_id = param->service_id; |
2705 | ||
2706 | if (param->private_data && param->private_data_len) | |
2707 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2708 | param->private_data_len); | |
2709 | } | |
2710 | ||
2711 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2712 | struct ib_cm_sidr_req_param *param) | |
2713 | { | |
2714 | struct cm_id_private *cm_id_priv; | |
2715 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2716 | unsigned long flags; |
2717 | int ret; | |
2718 | ||
2719 | if (!param->path || (param->private_data && | |
2720 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2721 | return -EINVAL; | |
2722 | ||
2723 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2724 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2725 | if (ret) | |
2726 | goto out; | |
2727 | ||
2728 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2729 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2730 | cm_id_priv->timeout_ms = param->timeout_ms; |
2731 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2732 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2733 | if (ret) | |
2734 | goto out; | |
2735 | ||
2736 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2737 | param); | |
34816ad9 | 2738 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2739 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2740 | ||
2741 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2742 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2743 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2744 | else |
2745 | ret = -EINVAL; | |
2746 | ||
2747 | if (ret) { | |
2748 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2749 | cm_free_msg(msg); | |
2750 | goto out; | |
2751 | } | |
2752 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2753 | cm_id_priv->msg = msg; | |
2754 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2755 | out: | |
2756 | return ret; | |
2757 | } | |
2758 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2759 | ||
2760 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2761 | struct ib_cm_id *listen_id) | |
2762 | { | |
2763 | struct cm_sidr_req_msg *sidr_req_msg; | |
2764 | struct ib_cm_sidr_req_event_param *param; | |
2765 | ||
2766 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2767 | work->mad_recv_wc->recv_buf.mad; | |
2768 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2769 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2770 | param->listen_id = listen_id; |
a977049d HR |
2771 | param->port = work->port->port_num; |
2772 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2773 | } | |
2774 | ||
2775 | static int cm_sidr_req_handler(struct cm_work *work) | |
2776 | { | |
2777 | struct ib_cm_id *cm_id; | |
2778 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2779 | struct cm_sidr_req_msg *sidr_req_msg; | |
2780 | struct ib_wc *wc; | |
a977049d | 2781 | |
07d357d0 | 2782 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
2783 | if (IS_ERR(cm_id)) |
2784 | return PTR_ERR(cm_id); | |
2785 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2786 | ||
2787 | /* Record SGID/SLID and request ID for lookup. */ | |
2788 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2789 | work->mad_recv_wc->recv_buf.mad; | |
2790 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2791 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2792 | cm_id_priv->av.dgid.global.interface_id = 0; |
2793 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 2794 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
2795 | &cm_id_priv->av); |
2796 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
a977049d HR |
2797 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
2798 | atomic_inc(&cm_id_priv->work_count); | |
2799 | ||
24be6e81 | 2800 | spin_lock_irq(&cm.lock); |
a977049d HR |
2801 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
2802 | if (cur_cm_id_priv) { | |
24be6e81 | 2803 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2804 | goto out; /* Duplicate message. */ |
2805 | } | |
29c2731c | 2806 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
07d357d0 | 2807 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
2808 | sidr_req_msg->service_id, |
2809 | sidr_req_msg->private_data); | |
a977049d | 2810 | if (!cur_cm_id_priv) { |
24be6e81 | 2811 | spin_unlock_irq(&cm.lock); |
6164c8cd | 2812 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
a977049d HR |
2813 | goto out; /* No match. */ |
2814 | } | |
2815 | atomic_inc(&cur_cm_id_priv->refcount); | |
24be6e81 | 2816 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2817 | |
2818 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2819 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2820 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2821 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2822 | |
2823 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2824 | cm_process_work(cm_id_priv, work); | |
2825 | cm_deref_id(cur_cm_id_priv); | |
2826 | return 0; | |
2827 | out: | |
2828 | ib_destroy_cm_id(&cm_id_priv->id); | |
2829 | return -EINVAL; | |
2830 | } | |
2831 | ||
2832 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2833 | struct cm_id_private *cm_id_priv, | |
2834 | struct ib_cm_sidr_rep_param *param) | |
2835 | { | |
2836 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2837 | cm_id_priv->tid); | |
2838 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2839 | sidr_rep_msg->status = param->status; | |
2840 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2841 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2842 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2843 | ||
2844 | if (param->info && param->info_length) | |
2845 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2846 | ||
2847 | if (param->private_data && param->private_data_len) | |
2848 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2849 | param->private_data_len); | |
2850 | } | |
2851 | ||
2852 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
2853 | struct ib_cm_sidr_rep_param *param) | |
2854 | { | |
2855 | struct cm_id_private *cm_id_priv; | |
2856 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2857 | unsigned long flags; |
2858 | int ret; | |
2859 | ||
2860 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
2861 | (param->private_data && | |
2862 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
2863 | return -EINVAL; | |
2864 | ||
2865 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2866 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2867 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
2868 | ret = -EINVAL; | |
2869 | goto error; | |
2870 | } | |
2871 | ||
2872 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2873 | if (ret) | |
2874 | goto error; | |
2875 | ||
2876 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
2877 | param); | |
34816ad9 | 2878 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2879 | if (ret) { |
2880 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2881 | cm_free_msg(msg); | |
2882 | return ret; | |
2883 | } | |
2884 | cm_id->state = IB_CM_IDLE; | |
2885 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2886 | ||
2887 | spin_lock_irqsave(&cm.lock, flags); | |
2888 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2889 | spin_unlock_irqrestore(&cm.lock, flags); | |
2890 | return 0; | |
2891 | ||
2892 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2893 | return ret; | |
2894 | } | |
2895 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
2896 | ||
2897 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
2898 | { | |
2899 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2900 | struct ib_cm_sidr_rep_event_param *param; | |
2901 | ||
2902 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2903 | work->mad_recv_wc->recv_buf.mad; | |
2904 | param = &work->cm_event.param.sidr_rep_rcvd; | |
2905 | param->status = sidr_rep_msg->status; | |
2906 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
2907 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
2908 | param->info = &sidr_rep_msg->info; | |
2909 | param->info_len = sidr_rep_msg->info_length; | |
2910 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
2911 | } | |
2912 | ||
2913 | static int cm_sidr_rep_handler(struct cm_work *work) | |
2914 | { | |
2915 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2916 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2917 | |
2918 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2919 | work->mad_recv_wc->recv_buf.mad; | |
2920 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
2921 | if (!cm_id_priv) | |
2922 | return -EINVAL; /* Unmatched reply. */ | |
2923 | ||
24be6e81 | 2924 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 2925 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 2926 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2927 | goto out; |
2928 | } | |
2929 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 2930 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 2931 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2932 | |
2933 | cm_format_sidr_rep_event(work); | |
2934 | cm_process_work(cm_id_priv, work); | |
2935 | return 0; | |
2936 | out: | |
2937 | cm_deref_id(cm_id_priv); | |
2938 | return -EINVAL; | |
2939 | } | |
2940 | ||
2941 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
2942 | enum ib_wc_status wc_status) | |
2943 | { | |
2944 | struct cm_id_private *cm_id_priv; | |
2945 | struct ib_cm_event cm_event; | |
2946 | enum ib_cm_state state; | |
a977049d HR |
2947 | int ret; |
2948 | ||
2949 | memset(&cm_event, 0, sizeof cm_event); | |
2950 | cm_id_priv = msg->context[0]; | |
2951 | ||
2952 | /* Discard old sends or ones without a response. */ | |
24be6e81 | 2953 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2954 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
2955 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
2956 | goto discard; | |
2957 | ||
2958 | switch (state) { | |
2959 | case IB_CM_REQ_SENT: | |
2960 | case IB_CM_MRA_REQ_RCVD: | |
2961 | cm_reset_to_idle(cm_id_priv); | |
2962 | cm_event.event = IB_CM_REQ_ERROR; | |
2963 | break; | |
2964 | case IB_CM_REP_SENT: | |
2965 | case IB_CM_MRA_REP_RCVD: | |
2966 | cm_reset_to_idle(cm_id_priv); | |
2967 | cm_event.event = IB_CM_REP_ERROR; | |
2968 | break; | |
2969 | case IB_CM_DREQ_SENT: | |
2970 | cm_enter_timewait(cm_id_priv); | |
2971 | cm_event.event = IB_CM_DREQ_ERROR; | |
2972 | break; | |
2973 | case IB_CM_SIDR_REQ_SENT: | |
2974 | cm_id_priv->id.state = IB_CM_IDLE; | |
2975 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
2976 | break; | |
2977 | default: | |
2978 | goto discard; | |
2979 | } | |
24be6e81 | 2980 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2981 | cm_event.param.send_status = wc_status; |
2982 | ||
2983 | /* No other events can occur on the cm_id at this point. */ | |
2984 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
2985 | cm_free_msg(msg); | |
2986 | if (ret) | |
2987 | ib_destroy_cm_id(&cm_id_priv->id); | |
2988 | return; | |
2989 | discard: | |
24be6e81 | 2990 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2991 | cm_free_msg(msg); |
2992 | } | |
2993 | ||
2994 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
2995 | struct ib_mad_send_wc *mad_send_wc) | |
2996 | { | |
34816ad9 | 2997 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
a977049d HR |
2998 | |
2999 | switch (mad_send_wc->status) { | |
3000 | case IB_WC_SUCCESS: | |
3001 | case IB_WC_WR_FLUSH_ERR: | |
3002 | cm_free_msg(msg); | |
3003 | break; | |
3004 | default: | |
3005 | if (msg->context[0] && msg->context[1]) | |
3006 | cm_process_send_error(msg, mad_send_wc->status); | |
3007 | else | |
3008 | cm_free_msg(msg); | |
3009 | break; | |
3010 | } | |
3011 | } | |
3012 | ||
c4028958 | 3013 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3014 | { |
c4028958 | 3015 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3016 | int ret; |
3017 | ||
3018 | switch (work->cm_event.event) { | |
3019 | case IB_CM_REQ_RECEIVED: | |
3020 | ret = cm_req_handler(work); | |
3021 | break; | |
3022 | case IB_CM_MRA_RECEIVED: | |
3023 | ret = cm_mra_handler(work); | |
3024 | break; | |
3025 | case IB_CM_REJ_RECEIVED: | |
3026 | ret = cm_rej_handler(work); | |
3027 | break; | |
3028 | case IB_CM_REP_RECEIVED: | |
3029 | ret = cm_rep_handler(work); | |
3030 | break; | |
3031 | case IB_CM_RTU_RECEIVED: | |
3032 | ret = cm_rtu_handler(work); | |
3033 | break; | |
3034 | case IB_CM_USER_ESTABLISHED: | |
3035 | ret = cm_establish_handler(work); | |
3036 | break; | |
3037 | case IB_CM_DREQ_RECEIVED: | |
3038 | ret = cm_dreq_handler(work); | |
3039 | break; | |
3040 | case IB_CM_DREP_RECEIVED: | |
3041 | ret = cm_drep_handler(work); | |
3042 | break; | |
3043 | case IB_CM_SIDR_REQ_RECEIVED: | |
3044 | ret = cm_sidr_req_handler(work); | |
3045 | break; | |
3046 | case IB_CM_SIDR_REP_RECEIVED: | |
3047 | ret = cm_sidr_rep_handler(work); | |
3048 | break; | |
3049 | case IB_CM_LAP_RECEIVED: | |
3050 | ret = cm_lap_handler(work); | |
3051 | break; | |
3052 | case IB_CM_APR_RECEIVED: | |
3053 | ret = cm_apr_handler(work); | |
3054 | break; | |
3055 | case IB_CM_TIMEWAIT_EXIT: | |
3056 | ret = cm_timewait_handler(work); | |
3057 | break; | |
3058 | default: | |
3059 | ret = -EINVAL; | |
3060 | break; | |
3061 | } | |
3062 | if (ret) | |
3063 | cm_free_work(work); | |
3064 | } | |
3065 | ||
e1444b5a | 3066 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3067 | { |
3068 | struct cm_id_private *cm_id_priv; | |
3069 | struct cm_work *work; | |
3070 | unsigned long flags; | |
3071 | int ret = 0; | |
3072 | ||
3073 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3074 | if (!work) | |
3075 | return -ENOMEM; | |
3076 | ||
3077 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3078 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3079 | switch (cm_id->state) | |
3080 | { | |
3081 | case IB_CM_REP_SENT: | |
3082 | case IB_CM_MRA_REP_RCVD: | |
3083 | cm_id->state = IB_CM_ESTABLISHED; | |
3084 | break; | |
3085 | case IB_CM_ESTABLISHED: | |
3086 | ret = -EISCONN; | |
3087 | break; | |
3088 | default: | |
3089 | ret = -EINVAL; | |
3090 | break; | |
3091 | } | |
3092 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3093 | ||
3094 | if (ret) { | |
3095 | kfree(work); | |
3096 | goto out; | |
3097 | } | |
3098 | ||
3099 | /* | |
3100 | * The CM worker thread may try to destroy the cm_id before it | |
3101 | * can execute this work item. To prevent potential deadlock, | |
3102 | * we need to find the cm_id once we're in the context of the | |
3103 | * worker thread, rather than holding a reference on it. | |
3104 | */ | |
c4028958 | 3105 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3106 | work->local_id = cm_id->local_id; |
3107 | work->remote_id = cm_id->remote_id; | |
3108 | work->mad_recv_wc = NULL; | |
3109 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
c4028958 | 3110 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3111 | out: |
3112 | return ret; | |
3113 | } | |
e1444b5a SH |
3114 | |
3115 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3116 | { | |
3117 | struct cm_id_private *cm_id_priv; | |
3118 | unsigned long flags; | |
3119 | int ret = 0; | |
3120 | ||
3121 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3122 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3123 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3124 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3125 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3126 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3127 | cm_id_priv->av = cm_id_priv->alt_av; | |
3128 | } else | |
3129 | ret = -EINVAL; | |
3130 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3131 | ||
3132 | return ret; | |
3133 | } | |
3134 | ||
3135 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3136 | { | |
3137 | int ret; | |
3138 | ||
3139 | switch (event) { | |
3140 | case IB_EVENT_COMM_EST: | |
3141 | ret = cm_establish(cm_id); | |
3142 | break; | |
3143 | case IB_EVENT_PATH_MIG: | |
3144 | ret = cm_migrate(cm_id); | |
3145 | break; | |
3146 | default: | |
3147 | ret = -EINVAL; | |
3148 | } | |
3149 | return ret; | |
3150 | } | |
3151 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3152 | |
3153 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3154 | struct ib_mad_recv_wc *mad_recv_wc) | |
3155 | { | |
3156 | struct cm_work *work; | |
3157 | enum ib_cm_event_type event; | |
3158 | int paths = 0; | |
3159 | ||
3160 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3161 | case CM_REQ_ATTR_ID: | |
3162 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3163 | alt_local_lid != 0); | |
3164 | event = IB_CM_REQ_RECEIVED; | |
3165 | break; | |
3166 | case CM_MRA_ATTR_ID: | |
3167 | event = IB_CM_MRA_RECEIVED; | |
3168 | break; | |
3169 | case CM_REJ_ATTR_ID: | |
3170 | event = IB_CM_REJ_RECEIVED; | |
3171 | break; | |
3172 | case CM_REP_ATTR_ID: | |
3173 | event = IB_CM_REP_RECEIVED; | |
3174 | break; | |
3175 | case CM_RTU_ATTR_ID: | |
3176 | event = IB_CM_RTU_RECEIVED; | |
3177 | break; | |
3178 | case CM_DREQ_ATTR_ID: | |
3179 | event = IB_CM_DREQ_RECEIVED; | |
3180 | break; | |
3181 | case CM_DREP_ATTR_ID: | |
3182 | event = IB_CM_DREP_RECEIVED; | |
3183 | break; | |
3184 | case CM_SIDR_REQ_ATTR_ID: | |
3185 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3186 | break; | |
3187 | case CM_SIDR_REP_ATTR_ID: | |
3188 | event = IB_CM_SIDR_REP_RECEIVED; | |
3189 | break; | |
3190 | case CM_LAP_ATTR_ID: | |
3191 | paths = 1; | |
3192 | event = IB_CM_LAP_RECEIVED; | |
3193 | break; | |
3194 | case CM_APR_ATTR_ID: | |
3195 | event = IB_CM_APR_RECEIVED; | |
3196 | break; | |
3197 | default: | |
3198 | ib_free_recv_mad(mad_recv_wc); | |
3199 | return; | |
3200 | } | |
3201 | ||
3202 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, | |
3203 | GFP_KERNEL); | |
3204 | if (!work) { | |
3205 | ib_free_recv_mad(mad_recv_wc); | |
3206 | return; | |
3207 | } | |
3208 | ||
c4028958 | 3209 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3210 | work->cm_event.event = event; |
3211 | work->mad_recv_wc = mad_recv_wc; | |
3212 | work->port = (struct cm_port *)mad_agent->context; | |
c4028958 | 3213 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3214 | } |
3215 | ||
3216 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3217 | struct ib_qp_attr *qp_attr, | |
3218 | int *qp_attr_mask) | |
3219 | { | |
3220 | unsigned long flags; | |
3221 | int ret; | |
3222 | ||
3223 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3224 | switch (cm_id_priv->id.state) { | |
3225 | case IB_CM_REQ_SENT: | |
3226 | case IB_CM_MRA_REQ_RCVD: | |
3227 | case IB_CM_REQ_RCVD: | |
3228 | case IB_CM_MRA_REQ_SENT: | |
3229 | case IB_CM_REP_RCVD: | |
3230 | case IB_CM_MRA_REP_SENT: | |
3231 | case IB_CM_REP_SENT: | |
3232 | case IB_CM_MRA_REP_RCVD: | |
3233 | case IB_CM_ESTABLISHED: | |
3234 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3235 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 3236 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 3237 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3238 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3239 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3240 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3241 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3242 | ret = 0; | |
3243 | break; | |
3244 | default: | |
3245 | ret = -EINVAL; | |
3246 | break; | |
3247 | } | |
3248 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3249 | return ret; | |
3250 | } | |
3251 | ||
3252 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3253 | struct ib_qp_attr *qp_attr, | |
3254 | int *qp_attr_mask) | |
3255 | { | |
3256 | unsigned long flags; | |
3257 | int ret; | |
3258 | ||
3259 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3260 | switch (cm_id_priv->id.state) { | |
3261 | case IB_CM_REQ_RCVD: | |
3262 | case IB_CM_MRA_REQ_SENT: | |
3263 | case IB_CM_REP_RCVD: | |
3264 | case IB_CM_MRA_REP_SENT: | |
3265 | case IB_CM_REP_SENT: | |
3266 | case IB_CM_MRA_REP_RCVD: | |
3267 | case IB_CM_ESTABLISHED: | |
3268 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3269 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3270 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3271 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3272 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3273 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
ae7971a7 SH |
3274 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3275 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | | |
3276 | IB_QP_MIN_RNR_TIMER; | |
3277 | qp_attr->max_dest_rd_atomic = | |
3278 | cm_id_priv->responder_resources; | |
3279 | qp_attr->min_rnr_timer = 0; | |
3280 | } | |
a977049d HR |
3281 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3282 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3283 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 3284 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 3285 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
3286 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3287 | } | |
3288 | ret = 0; | |
3289 | break; | |
3290 | default: | |
3291 | ret = -EINVAL; | |
3292 | break; | |
3293 | } | |
3294 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3295 | return ret; | |
3296 | } | |
3297 | ||
3298 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3299 | struct ib_qp_attr *qp_attr, | |
3300 | int *qp_attr_mask) | |
3301 | { | |
3302 | unsigned long flags; | |
3303 | int ret; | |
3304 | ||
3305 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3306 | switch (cm_id_priv->id.state) { | |
0fe313b0 SH |
3307 | /* Allow transition to RTS before sending REP */ |
3308 | case IB_CM_REQ_RCVD: | |
3309 | case IB_CM_MRA_REQ_SENT: | |
3310 | ||
a977049d HR |
3311 | case IB_CM_REP_RCVD: |
3312 | case IB_CM_MRA_REP_SENT: | |
3313 | case IB_CM_REP_SENT: | |
3314 | case IB_CM_MRA_REP_RCVD: | |
3315 | case IB_CM_ESTABLISHED: | |
e1444b5a SH |
3316 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
3317 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
3318 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
3319 | if (cm_id_priv->qp_type == IB_QPT_RC) { | |
3320 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3321 | IB_QP_RNR_RETRY | | |
3322 | IB_QP_MAX_QP_RD_ATOMIC; | |
1d846126 | 3323 | qp_attr->timeout = cm_id_priv->av.timeout; |
e1444b5a SH |
3324 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
3325 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3326 | qp_attr->max_rd_atomic = | |
3327 | cm_id_priv->initiator_depth; | |
3328 | } | |
3329 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3330 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3331 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3332 | } | |
3333 | } else { | |
3334 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
3335 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; | |
3336 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; | |
1d846126 | 3337 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 3338 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
3339 | qp_attr->path_mig_state = IB_MIG_REARM; |
3340 | } | |
3341 | ret = 0; | |
3342 | break; | |
3343 | default: | |
3344 | ret = -EINVAL; | |
3345 | break; | |
3346 | } | |
3347 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3348 | return ret; | |
3349 | } | |
3350 | ||
3351 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3352 | struct ib_qp_attr *qp_attr, | |
3353 | int *qp_attr_mask) | |
3354 | { | |
3355 | struct cm_id_private *cm_id_priv; | |
3356 | int ret; | |
3357 | ||
3358 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3359 | switch (qp_attr->qp_state) { | |
3360 | case IB_QPS_INIT: | |
3361 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3362 | break; | |
3363 | case IB_QPS_RTR: | |
3364 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3365 | break; | |
3366 | case IB_QPS_RTS: | |
3367 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3368 | break; | |
3369 | default: | |
3370 | ret = -EINVAL; | |
3371 | break; | |
3372 | } | |
3373 | return ret; | |
3374 | } | |
3375 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3376 | ||
454a01e7 | 3377 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
1d846126 SH |
3378 | { |
3379 | struct ib_device_attr attr; | |
3380 | ||
3381 | if (ib_query_device(cm_dev->device, &attr)) | |
3382 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ | |
3383 | else | |
3384 | cm_dev->ack_delay = attr.local_ca_ack_delay; | |
3385 | } | |
3386 | ||
a977049d HR |
3387 | static void cm_add_one(struct ib_device *device) |
3388 | { | |
3389 | struct cm_device *cm_dev; | |
3390 | struct cm_port *port; | |
3391 | struct ib_mad_reg_req reg_req = { | |
3392 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3393 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3394 | }; | |
3395 | struct ib_port_modify port_modify = { | |
3396 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3397 | }; | |
3398 | unsigned long flags; | |
3399 | int ret; | |
3400 | u8 i; | |
3401 | ||
07ebafba TT |
3402 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
3403 | return; | |
3404 | ||
a977049d HR |
3405 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * |
3406 | device->phys_port_cnt, GFP_KERNEL); | |
3407 | if (!cm_dev) | |
3408 | return; | |
3409 | ||
3410 | cm_dev->device = device; | |
1d846126 | 3411 | cm_get_ack_delay(cm_dev); |
a977049d HR |
3412 | |
3413 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); | |
3414 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3415 | port = &cm_dev->port[i-1]; | |
3416 | port->cm_dev = cm_dev; | |
3417 | port->port_num = i; | |
3418 | port->mad_agent = ib_register_mad_agent(device, i, | |
3419 | IB_QPT_GSI, | |
3420 | ®_req, | |
3421 | 0, | |
3422 | cm_send_handler, | |
3423 | cm_recv_handler, | |
3424 | port); | |
3425 | if (IS_ERR(port->mad_agent)) | |
cf311cd4 | 3426 | goto error1; |
a977049d HR |
3427 | |
3428 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3429 | if (ret) | |
cf311cd4 | 3430 | goto error2; |
a977049d HR |
3431 | } |
3432 | ib_set_client_data(device, &cm_client, cm_dev); | |
3433 | ||
3434 | write_lock_irqsave(&cm.device_lock, flags); | |
3435 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3436 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3437 | return; | |
3438 | ||
a977049d | 3439 | error2: |
cf311cd4 SH |
3440 | ib_unregister_mad_agent(port->mad_agent); |
3441 | error1: | |
a977049d HR |
3442 | port_modify.set_port_cap_mask = 0; |
3443 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3444 | while (--i) { | |
3445 | port = &cm_dev->port[i-1]; | |
3446 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3447 | ib_unregister_mad_agent(port->mad_agent); | |
3448 | } | |
a977049d HR |
3449 | kfree(cm_dev); |
3450 | } | |
3451 | ||
3452 | static void cm_remove_one(struct ib_device *device) | |
3453 | { | |
3454 | struct cm_device *cm_dev; | |
3455 | struct cm_port *port; | |
3456 | struct ib_port_modify port_modify = { | |
3457 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3458 | }; | |
3459 | unsigned long flags; | |
3460 | int i; | |
3461 | ||
3462 | cm_dev = ib_get_client_data(device, &cm_client); | |
3463 | if (!cm_dev) | |
3464 | return; | |
3465 | ||
3466 | write_lock_irqsave(&cm.device_lock, flags); | |
3467 | list_del(&cm_dev->list); | |
3468 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3469 | ||
3470 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3471 | port = &cm_dev->port[i-1]; | |
3472 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3473 | ib_unregister_mad_agent(port->mad_agent); | |
3474 | } | |
3475 | kfree(cm_dev); | |
3476 | } | |
3477 | ||
3478 | static int __init ib_cm_init(void) | |
3479 | { | |
3480 | int ret; | |
3481 | ||
3482 | memset(&cm, 0, sizeof cm); | |
3483 | INIT_LIST_HEAD(&cm.device_list); | |
3484 | rwlock_init(&cm.device_lock); | |
3485 | spin_lock_init(&cm.lock); | |
3486 | cm.listen_service_table = RB_ROOT; | |
3487 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3488 | cm.remote_id_table = RB_ROOT; | |
3489 | cm.remote_qp_table = RB_ROOT; | |
3490 | cm.remote_sidr_table = RB_ROOT; | |
3491 | idr_init(&cm.local_id_table); | |
f06d2653 | 3492 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
a977049d | 3493 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
8575329d | 3494 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d HR |
3495 | |
3496 | cm.wq = create_workqueue("ib_cm"); | |
3497 | if (!cm.wq) | |
3498 | return -ENOMEM; | |
3499 | ||
3500 | ret = ib_register_client(&cm_client); | |
3501 | if (ret) | |
3502 | goto error; | |
3503 | ||
3504 | return 0; | |
3505 | error: | |
3506 | destroy_workqueue(cm.wq); | |
3507 | return ret; | |
3508 | } | |
3509 | ||
3510 | static void __exit ib_cm_cleanup(void) | |
3511 | { | |
8575329d SH |
3512 | struct cm_timewait_info *timewait_info, *tmp; |
3513 | ||
3514 | spin_lock_irq(&cm.lock); | |
3515 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3516 | cancel_delayed_work(&timewait_info->work.work); | |
3517 | spin_unlock_irq(&cm.lock); | |
3518 | ||
a977049d | 3519 | destroy_workqueue(cm.wq); |
8575329d SH |
3520 | |
3521 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3522 | list_del(&timewait_info->list); | |
3523 | kfree(timewait_info); | |
3524 | } | |
3525 | ||
a977049d | 3526 | ib_unregister_client(&cm_client); |
5d7edb3c | 3527 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3528 | } |
3529 | ||
3530 | module_init(ib_cm_init); | |
3531 | module_exit(ib_cm_cleanup); | |
3532 |