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a977049d | 1 | /* |
f06d2653 | 2 | * Copyright (c) 2004-2006 Intel Corporation. All rights reserved. |
a977049d HR |
3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. | |
5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
6 | * | |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
34 | * | |
6e61d04f | 35 | * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $ |
a977049d | 36 | */ |
1b52fa98 SH |
37 | |
38 | #include <linux/completion.h> | |
a977049d HR |
39 | #include <linux/dma-mapping.h> |
40 | #include <linux/err.h> | |
41 | #include <linux/idr.h> | |
42 | #include <linux/interrupt.h> | |
43 | #include <linux/pci.h> | |
f06d2653 | 44 | #include <linux/random.h> |
a977049d HR |
45 | #include <linux/rbtree.h> |
46 | #include <linux/spinlock.h> | |
47 | #include <linux/workqueue.h> | |
48 | ||
a4d61e84 RD |
49 | #include <rdma/ib_cache.h> |
50 | #include <rdma/ib_cm.h> | |
a977049d HR |
51 | #include "cm_msgs.h" |
52 | ||
53 | MODULE_AUTHOR("Sean Hefty"); | |
54 | MODULE_DESCRIPTION("InfiniBand CM"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
57 | static void cm_add_one(struct ib_device *device); | |
58 | static void cm_remove_one(struct ib_device *device); | |
59 | ||
60 | static struct ib_client cm_client = { | |
61 | .name = "cm", | |
62 | .add = cm_add_one, | |
63 | .remove = cm_remove_one | |
64 | }; | |
65 | ||
66 | static struct ib_cm { | |
67 | spinlock_t lock; | |
68 | struct list_head device_list; | |
69 | rwlock_t device_lock; | |
70 | struct rb_root listen_service_table; | |
71 | u64 listen_service_id; | |
72 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
73 | struct rb_root remote_qp_table; | |
74 | struct rb_root remote_id_table; | |
75 | struct rb_root remote_sidr_table; | |
76 | struct idr local_id_table; | |
f06d2653 | 77 | __be32 random_id_operand; |
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; | |
97f52eb4 | 90 | __be64 ca_guid; |
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; | |
99 | u8 packet_life_time; | |
100 | }; | |
101 | ||
102 | struct cm_work { | |
103 | struct work_struct work; | |
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. */ | |
115 | struct rb_node remote_qp_node; | |
116 | struct rb_node remote_id_node; | |
97f52eb4 SH |
117 | __be64 remote_ca_guid; |
118 | __be32 remote_qpn; | |
a977049d HR |
119 | u8 inserted_remote_qp; |
120 | u8 inserted_remote_id; | |
121 | }; | |
122 | ||
123 | struct cm_id_private { | |
124 | struct ib_cm_id id; | |
125 | ||
126 | struct rb_node service_node; | |
127 | struct rb_node sidr_id_node; | |
87fd1a11 | 128 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 129 | struct completion comp; |
a977049d HR |
130 | atomic_t refcount; |
131 | ||
132 | struct ib_mad_send_buf *msg; | |
133 | struct cm_timewait_info *timewait_info; | |
134 | /* todo: use alternate port on send failure */ | |
135 | struct cm_av av; | |
136 | struct cm_av alt_av; | |
6e61d04f | 137 | struct ib_cm_compare_data *compare_data; |
a977049d HR |
138 | |
139 | void *private_data; | |
97f52eb4 SH |
140 | __be64 tid; |
141 | __be32 local_qpn; | |
142 | __be32 remote_qpn; | |
ae7971a7 | 143 | enum ib_qp_type qp_type; |
97f52eb4 SH |
144 | __be32 sq_psn; |
145 | __be32 rq_psn; | |
a977049d HR |
146 | int timeout_ms; |
147 | enum ib_mtu path_mtu; | |
148 | u8 private_data_len; | |
149 | u8 max_cm_retries; | |
150 | u8 peer_to_peer; | |
151 | u8 responder_resources; | |
152 | u8 initiator_depth; | |
153 | u8 local_ack_timeout; | |
154 | u8 retry_count; | |
155 | u8 rnr_retry_count; | |
156 | u8 service_timeout; | |
157 | ||
158 | struct list_head work_list; | |
159 | atomic_t work_count; | |
160 | }; | |
161 | ||
162 | static void cm_work_handler(void *data); | |
163 | ||
164 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
165 | { | |
166 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 167 | complete(&cm_id_priv->comp); |
a977049d HR |
168 | } |
169 | ||
170 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
171 | struct ib_mad_send_buf **msg) | |
172 | { | |
173 | struct ib_mad_agent *mad_agent; | |
174 | struct ib_mad_send_buf *m; | |
175 | struct ib_ah *ah; | |
176 | ||
177 | mad_agent = cm_id_priv->av.port->mad_agent; | |
178 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
179 | if (IS_ERR(ah)) | |
180 | return PTR_ERR(ah); | |
181 | ||
3cd96564 | 182 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
354ba39c | 183 | cm_id_priv->av.pkey_index, |
34816ad9 | 184 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
185 | GFP_ATOMIC); |
186 | if (IS_ERR(m)) { | |
187 | ib_destroy_ah(ah); | |
188 | return PTR_ERR(m); | |
189 | } | |
190 | ||
191 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
192 | m->ah = ah; |
193 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
194 | |
195 | atomic_inc(&cm_id_priv->refcount); | |
196 | m->context[0] = cm_id_priv; | |
197 | *msg = m; | |
198 | return 0; | |
199 | } | |
200 | ||
201 | static int cm_alloc_response_msg(struct cm_port *port, | |
202 | struct ib_mad_recv_wc *mad_recv_wc, | |
203 | struct ib_mad_send_buf **msg) | |
204 | { | |
205 | struct ib_mad_send_buf *m; | |
206 | struct ib_ah *ah; | |
207 | ||
208 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
209 | mad_recv_wc->recv_buf.grh, port->port_num); | |
210 | if (IS_ERR(ah)) | |
211 | return PTR_ERR(ah); | |
212 | ||
213 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 214 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
215 | GFP_ATOMIC); |
216 | if (IS_ERR(m)) { | |
217 | ib_destroy_ah(ah); | |
218 | return PTR_ERR(m); | |
219 | } | |
34816ad9 | 220 | m->ah = ah; |
a977049d HR |
221 | *msg = m; |
222 | return 0; | |
223 | } | |
224 | ||
225 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
226 | { | |
34816ad9 | 227 | ib_destroy_ah(msg->ah); |
a977049d HR |
228 | if (msg->context[0]) |
229 | cm_deref_id(msg->context[0]); | |
230 | ib_free_send_mad(msg); | |
231 | } | |
232 | ||
233 | static void * cm_copy_private_data(const void *private_data, | |
234 | u8 private_data_len) | |
235 | { | |
236 | void *data; | |
237 | ||
238 | if (!private_data || !private_data_len) | |
239 | return NULL; | |
240 | ||
241 | data = kmalloc(private_data_len, GFP_KERNEL); | |
242 | if (!data) | |
243 | return ERR_PTR(-ENOMEM); | |
244 | ||
245 | memcpy(data, private_data, private_data_len); | |
246 | return data; | |
247 | } | |
248 | ||
249 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
250 | void *private_data, u8 private_data_len) | |
251 | { | |
252 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
253 | kfree(cm_id_priv->private_data); | |
254 | ||
255 | cm_id_priv->private_data = private_data; | |
256 | cm_id_priv->private_data_len = private_data_len; | |
257 | } | |
258 | ||
ca222c6b SH |
259 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
260 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
261 | { |
262 | av->port = port; | |
263 | av->pkey_index = wc->pkey_index; | |
ca222c6b SH |
264 | ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc, |
265 | grh, &av->ah_attr); | |
a977049d HR |
266 | } |
267 | ||
268 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
269 | { | |
270 | struct cm_device *cm_dev; | |
271 | struct cm_port *port = NULL; | |
272 | unsigned long flags; | |
273 | int ret; | |
274 | u8 p; | |
275 | ||
276 | read_lock_irqsave(&cm.device_lock, flags); | |
277 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
278 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, | |
279 | &p, NULL)) { | |
280 | port = &cm_dev->port[p-1]; | |
281 | break; | |
282 | } | |
283 | } | |
284 | read_unlock_irqrestore(&cm.device_lock, flags); | |
285 | ||
286 | if (!port) | |
287 | return -EINVAL; | |
288 | ||
289 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, | |
290 | be16_to_cpu(path->pkey), &av->pkey_index); | |
291 | if (ret) | |
292 | return ret; | |
293 | ||
294 | av->port = port; | |
ca222c6b SH |
295 | ib_init_ah_from_path(cm_dev->device, port->port_num, path, |
296 | &av->ah_attr); | |
a977049d HR |
297 | av->packet_life_time = path->packet_life_time; |
298 | return 0; | |
299 | } | |
300 | ||
301 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
302 | { | |
303 | unsigned long flags; | |
f06d2653 | 304 | int ret, id; |
de1bb1a6 | 305 | static int next_id; |
a977049d HR |
306 | |
307 | do { | |
308 | spin_lock_irqsave(&cm.lock, flags); | |
f06d2653 SH |
309 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
310 | next_id++, &id); | |
a977049d HR |
311 | spin_unlock_irqrestore(&cm.lock, flags); |
312 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
f06d2653 SH |
313 | |
314 | cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand); | |
a977049d HR |
315 | return ret; |
316 | } | |
317 | ||
97f52eb4 | 318 | static void cm_free_id(__be32 local_id) |
a977049d HR |
319 | { |
320 | unsigned long flags; | |
321 | ||
322 | spin_lock_irqsave(&cm.lock, flags); | |
f06d2653 SH |
323 | idr_remove(&cm.local_id_table, |
324 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
325 | spin_unlock_irqrestore(&cm.lock, flags); |
326 | } | |
327 | ||
97f52eb4 | 328 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
329 | { |
330 | struct cm_id_private *cm_id_priv; | |
331 | ||
f06d2653 SH |
332 | cm_id_priv = idr_find(&cm.local_id_table, |
333 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
334 | if (cm_id_priv) { |
335 | if (cm_id_priv->id.remote_id == remote_id) | |
336 | atomic_inc(&cm_id_priv->refcount); | |
337 | else | |
338 | cm_id_priv = NULL; | |
339 | } | |
340 | ||
341 | return cm_id_priv; | |
342 | } | |
343 | ||
97f52eb4 | 344 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
345 | { |
346 | struct cm_id_private *cm_id_priv; | |
347 | unsigned long flags; | |
348 | ||
349 | spin_lock_irqsave(&cm.lock, flags); | |
350 | cm_id_priv = cm_get_id(local_id, remote_id); | |
351 | spin_unlock_irqrestore(&cm.lock, flags); | |
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 | ||
648 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) | |
649 | { | |
650 | unsigned long flags; | |
651 | ||
652 | if (!timewait_info->inserted_remote_id && | |
653 | !timewait_info->inserted_remote_qp) | |
654 | return; | |
655 | ||
656 | spin_lock_irqsave(&cm.lock, flags); | |
657 | if (timewait_info->inserted_remote_id) { | |
658 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
659 | timewait_info->inserted_remote_id = 0; | |
660 | } | |
661 | ||
662 | if (timewait_info->inserted_remote_qp) { | |
663 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
664 | timewait_info->inserted_remote_qp = 0; | |
665 | } | |
666 | spin_unlock_irqrestore(&cm.lock, flags); | |
667 | } | |
668 | ||
97f52eb4 | 669 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
670 | { |
671 | struct cm_timewait_info *timewait_info; | |
672 | ||
de6eb66b | 673 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
674 | if (!timewait_info) |
675 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
676 | |
677 | timewait_info->work.local_id = local_id; | |
678 | INIT_WORK(&timewait_info->work.work, cm_work_handler, | |
679 | &timewait_info->work); | |
680 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; | |
681 | return timewait_info; | |
682 | } | |
683 | ||
684 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
685 | { | |
686 | int wait_time; | |
687 | ||
688 | /* | |
689 | * The cm_id could be destroyed by the user before we exit timewait. | |
690 | * To protect against this, we search for the cm_id after exiting | |
691 | * timewait before notifying the user that we've exited timewait. | |
692 | */ | |
693 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
694 | wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout); | |
695 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
696 | msecs_to_jiffies(wait_time)); | |
697 | cm_id_priv->timewait_info = NULL; | |
698 | } | |
699 | ||
700 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
701 | { | |
702 | cm_id_priv->id.state = IB_CM_IDLE; | |
703 | if (cm_id_priv->timewait_info) { | |
704 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
705 | kfree(cm_id_priv->timewait_info); | |
706 | cm_id_priv->timewait_info = NULL; | |
707 | } | |
708 | } | |
709 | ||
04c33543 | 710 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
711 | { |
712 | struct cm_id_private *cm_id_priv; | |
713 | struct cm_work *work; | |
714 | unsigned long flags; | |
715 | ||
716 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
717 | retest: | |
718 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
719 | switch (cm_id->state) { | |
720 | case IB_CM_LISTEN: | |
721 | cm_id->state = IB_CM_IDLE; | |
722 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
723 | spin_lock_irqsave(&cm.lock, flags); | |
724 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); | |
725 | spin_unlock_irqrestore(&cm.lock, flags); | |
726 | break; | |
727 | case IB_CM_SIDR_REQ_SENT: | |
728 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 729 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
730 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
731 | break; | |
732 | case IB_CM_SIDR_REQ_RCVD: | |
733 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
734 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); | |
735 | break; | |
736 | case IB_CM_REQ_SENT: | |
227eca83 SH |
737 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
738 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
739 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, | |
740 | &cm_id_priv->av.port->cm_dev->ca_guid, | |
741 | sizeof cm_id_priv->av.port->cm_dev->ca_guid, | |
742 | NULL, 0); | |
743 | break; | |
04c33543 MT |
744 | case IB_CM_REQ_RCVD: |
745 | if (err == -ENOMEM) { | |
746 | /* Do not reject to allow future retries. */ | |
747 | cm_reset_to_idle(cm_id_priv); | |
748 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
749 | } else { | |
750 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
751 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, | |
752 | NULL, 0, NULL, 0); | |
753 | } | |
754 | break; | |
a977049d HR |
755 | case IB_CM_MRA_REQ_RCVD: |
756 | case IB_CM_REP_SENT: | |
757 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 758 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 759 | /* Fall through */ |
a977049d HR |
760 | case IB_CM_MRA_REQ_SENT: |
761 | case IB_CM_REP_RCVD: | |
762 | case IB_CM_MRA_REP_SENT: | |
763 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
227eca83 SH |
764 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
765 | NULL, 0, NULL, 0); | |
a977049d HR |
766 | break; |
767 | case IB_CM_ESTABLISHED: | |
768 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
769 | ib_send_cm_dreq(cm_id, NULL, 0); | |
770 | goto retest; | |
771 | case IB_CM_DREQ_SENT: | |
34816ad9 | 772 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
773 | cm_enter_timewait(cm_id_priv); |
774 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
775 | break; | |
776 | case IB_CM_DREQ_RCVD: | |
777 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
778 | ib_send_cm_drep(cm_id, NULL, 0); | |
779 | break; | |
780 | default: | |
781 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
782 | break; | |
783 | } | |
784 | ||
785 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
786 | cm_deref_id(cm_id_priv); |
787 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
788 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
789 | cm_free_work(work); | |
6e61d04f SH |
790 | kfree(cm_id_priv->compare_data); |
791 | kfree(cm_id_priv->private_data); | |
a977049d HR |
792 | kfree(cm_id_priv); |
793 | } | |
04c33543 MT |
794 | |
795 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
796 | { | |
797 | cm_destroy_id(cm_id, 0); | |
798 | } | |
a977049d HR |
799 | EXPORT_SYMBOL(ib_destroy_cm_id); |
800 | ||
6e61d04f SH |
801 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
802 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
803 | { |
804 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
805 | unsigned long flags; | |
806 | int ret = 0; | |
807 | ||
97f52eb4 SH |
808 | service_mask = service_mask ? service_mask : |
809 | __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
810 | service_id &= service_mask; |
811 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
812 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
813 | return -EINVAL; | |
814 | ||
815 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
816 | if (cm_id->state != IB_CM_IDLE) |
817 | return -EINVAL; | |
818 | ||
819 | if (compare_data) { | |
820 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
821 | GFP_KERNEL); | |
822 | if (!cm_id_priv->compare_data) | |
823 | return -ENOMEM; | |
824 | cm_mask_copy(cm_id_priv->compare_data->data, | |
825 | compare_data->data, compare_data->mask); | |
826 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
827 | IB_CM_COMPARE_SIZE); | |
828 | } | |
a977049d HR |
829 | |
830 | cm_id->state = IB_CM_LISTEN; | |
831 | ||
832 | spin_lock_irqsave(&cm.lock, flags); | |
833 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 SH |
834 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
835 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
836 | } else { |
837 | cm_id->service_id = service_id; | |
838 | cm_id->service_mask = service_mask; | |
839 | } | |
840 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
841 | spin_unlock_irqrestore(&cm.lock, flags); | |
842 | ||
843 | if (cur_cm_id_priv) { | |
844 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
845 | kfree(cm_id_priv->compare_data); |
846 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
847 | ret = -EBUSY; |
848 | } | |
849 | return ret; | |
850 | } | |
851 | EXPORT_SYMBOL(ib_cm_listen); | |
852 | ||
97f52eb4 SH |
853 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
854 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
855 | { |
856 | u64 hi_tid, low_tid; | |
857 | ||
858 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
859 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
860 | (msg_seq << 30)); | |
a977049d HR |
861 | return cpu_to_be64(hi_tid | low_tid); |
862 | } | |
863 | ||
864 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 865 | __be16 attr_id, __be64 tid) |
a977049d HR |
866 | { |
867 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
868 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
869 | hdr->class_version = IB_CM_CLASS_VERSION; | |
870 | hdr->method = IB_MGMT_METHOD_SEND; | |
871 | hdr->attr_id = attr_id; | |
872 | hdr->tid = tid; | |
873 | } | |
874 | ||
875 | static void cm_format_req(struct cm_req_msg *req_msg, | |
876 | struct cm_id_private *cm_id_priv, | |
877 | struct ib_cm_req_param *param) | |
878 | { | |
879 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, | |
880 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
881 | ||
882 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
883 | req_msg->service_id = param->service_id; | |
884 | req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
885 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); | |
886 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
887 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
888 | cm_req_set_remote_resp_timeout(req_msg, | |
889 | param->remote_cm_response_timeout); | |
890 | cm_req_set_qp_type(req_msg, param->qp_type); | |
891 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
892 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
893 | cm_req_set_local_resp_timeout(req_msg, | |
894 | param->local_cm_response_timeout); | |
895 | cm_req_set_retry_count(req_msg, param->retry_count); | |
896 | req_msg->pkey = param->primary_path->pkey; | |
897 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
898 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
899 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
900 | cm_req_set_srq(req_msg, param->srq); | |
901 | ||
902 | req_msg->primary_local_lid = param->primary_path->slid; | |
903 | req_msg->primary_remote_lid = param->primary_path->dlid; | |
904 | req_msg->primary_local_gid = param->primary_path->sgid; | |
905 | req_msg->primary_remote_gid = param->primary_path->dgid; | |
906 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); | |
907 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); | |
908 | req_msg->primary_traffic_class = param->primary_path->traffic_class; | |
909 | req_msg->primary_hop_limit = param->primary_path->hop_limit; | |
910 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); | |
911 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ | |
912 | cm_req_set_primary_local_ack_timeout(req_msg, | |
913 | min(31, param->primary_path->packet_life_time + 1)); | |
914 | ||
915 | if (param->alternate_path) { | |
916 | req_msg->alt_local_lid = param->alternate_path->slid; | |
917 | req_msg->alt_remote_lid = param->alternate_path->dlid; | |
918 | req_msg->alt_local_gid = param->alternate_path->sgid; | |
919 | req_msg->alt_remote_gid = param->alternate_path->dgid; | |
920 | cm_req_set_alt_flow_label(req_msg, | |
921 | param->alternate_path->flow_label); | |
922 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); | |
923 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; | |
924 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; | |
925 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); | |
926 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ | |
927 | cm_req_set_alt_local_ack_timeout(req_msg, | |
928 | min(31, param->alternate_path->packet_life_time + 1)); | |
929 | } | |
930 | ||
931 | if (param->private_data && param->private_data_len) | |
932 | memcpy(req_msg->private_data, param->private_data, | |
933 | param->private_data_len); | |
934 | } | |
935 | ||
858119e1 | 936 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
937 | { |
938 | /* peer-to-peer not supported */ | |
939 | if (param->peer_to_peer) | |
940 | return -EINVAL; | |
941 | ||
942 | if (!param->primary_path) | |
943 | return -EINVAL; | |
944 | ||
945 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
946 | return -EINVAL; | |
947 | ||
948 | if (param->private_data && | |
949 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
950 | return -EINVAL; | |
951 | ||
952 | if (param->alternate_path && | |
953 | (param->alternate_path->pkey != param->primary_path->pkey || | |
954 | param->alternate_path->mtu != param->primary_path->mtu)) | |
955 | return -EINVAL; | |
956 | ||
957 | return 0; | |
958 | } | |
959 | ||
960 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
961 | struct ib_cm_req_param *param) | |
962 | { | |
963 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
964 | struct cm_req_msg *req_msg; |
965 | unsigned long flags; | |
966 | int ret; | |
967 | ||
968 | ret = cm_validate_req_param(param); | |
969 | if (ret) | |
970 | return ret; | |
971 | ||
972 | /* Verify that we're not in timewait. */ | |
973 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
974 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
975 | if (cm_id->state != IB_CM_IDLE) { | |
976 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
977 | ret = -EINVAL; | |
978 | goto out; | |
979 | } | |
980 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
981 | ||
982 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
983 | id.local_id); | |
75df23e2 SH |
984 | if (IS_ERR(cm_id_priv->timewait_info)) { |
985 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 986 | goto out; |
75df23e2 | 987 | } |
a977049d HR |
988 | |
989 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
990 | if (ret) | |
991 | goto error1; | |
992 | if (param->alternate_path) { | |
993 | ret = cm_init_av_by_path(param->alternate_path, | |
994 | &cm_id_priv->alt_av); | |
995 | if (ret) | |
996 | goto error1; | |
997 | } | |
998 | cm_id->service_id = param->service_id; | |
97f52eb4 | 999 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1000 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1001 | param->primary_path->packet_life_time) * 2 + | |
1002 | cm_convert_to_ms( | |
1003 | param->remote_cm_response_timeout); | |
1004 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1005 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1006 | cm_id_priv->responder_resources = param->responder_resources; | |
1007 | cm_id_priv->retry_count = param->retry_count; | |
1008 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
ae7971a7 | 1009 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1010 | |
1011 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1012 | if (ret) | |
1013 | goto error1; | |
1014 | ||
1015 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1016 | cm_format_req(req_msg, cm_id_priv, param); | |
1017 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1018 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1019 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1020 | ||
1021 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1022 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
1023 | cm_id_priv->local_ack_timeout = | |
1024 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1025 | ||
1026 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1027 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1028 | if (ret) { |
1029 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1030 | goto error2; | |
1031 | } | |
1032 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1033 | cm_id->state = IB_CM_REQ_SENT; | |
1034 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1035 | return 0; | |
1036 | ||
1037 | error2: cm_free_msg(cm_id_priv->msg); | |
1038 | error1: kfree(cm_id_priv->timewait_info); | |
1039 | out: return ret; | |
1040 | } | |
1041 | EXPORT_SYMBOL(ib_send_cm_req); | |
1042 | ||
1043 | static int cm_issue_rej(struct cm_port *port, | |
1044 | struct ib_mad_recv_wc *mad_recv_wc, | |
1045 | enum ib_cm_rej_reason reason, | |
1046 | enum cm_msg_response msg_rejected, | |
1047 | void *ari, u8 ari_length) | |
1048 | { | |
1049 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1050 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1051 | int ret; | |
1052 | ||
1053 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1054 | if (ret) | |
1055 | return ret; | |
1056 | ||
1057 | /* We just need common CM header information. Cast to any message. */ | |
1058 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1059 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1060 | ||
1061 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1062 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1063 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1064 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1065 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1066 | |
1067 | if (ari && ari_length) { | |
1068 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1069 | memcpy(rej_msg->ari, ari, ari_length); | |
1070 | } | |
1071 | ||
34816ad9 | 1072 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1073 | if (ret) |
1074 | cm_free_msg(msg); | |
1075 | ||
1076 | return ret; | |
1077 | } | |
1078 | ||
97f52eb4 SH |
1079 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1080 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1081 | { |
1082 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1083 | ((local_ca_guid == remote_ca_guid) && | |
1084 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1085 | } | |
1086 | ||
858119e1 | 1087 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1088 | struct ib_sa_path_rec *primary_path, |
1089 | struct ib_sa_path_rec *alt_path) | |
1090 | { | |
1091 | memset(primary_path, 0, sizeof *primary_path); | |
1092 | primary_path->dgid = req_msg->primary_local_gid; | |
1093 | primary_path->sgid = req_msg->primary_remote_gid; | |
1094 | primary_path->dlid = req_msg->primary_local_lid; | |
1095 | primary_path->slid = req_msg->primary_remote_lid; | |
1096 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1097 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1098 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1099 | primary_path->reversible = 1; | |
1100 | primary_path->pkey = req_msg->pkey; | |
1101 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1102 | primary_path->mtu_selector = IB_SA_EQ; | |
1103 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1104 | primary_path->rate_selector = IB_SA_EQ; | |
1105 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1106 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1107 | primary_path->packet_life_time = | |
1108 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1109 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1110 | ||
1111 | if (req_msg->alt_local_lid) { | |
1112 | memset(alt_path, 0, sizeof *alt_path); | |
1113 | alt_path->dgid = req_msg->alt_local_gid; | |
1114 | alt_path->sgid = req_msg->alt_remote_gid; | |
1115 | alt_path->dlid = req_msg->alt_local_lid; | |
1116 | alt_path->slid = req_msg->alt_remote_lid; | |
1117 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1118 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1119 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1120 | alt_path->reversible = 1; | |
1121 | alt_path->pkey = req_msg->pkey; | |
1122 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1123 | alt_path->mtu_selector = IB_SA_EQ; | |
1124 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1125 | alt_path->rate_selector = IB_SA_EQ; | |
1126 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1127 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1128 | alt_path->packet_life_time = | |
1129 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1130 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1131 | } | |
1132 | } | |
1133 | ||
1134 | static void cm_format_req_event(struct cm_work *work, | |
1135 | struct cm_id_private *cm_id_priv, | |
1136 | struct ib_cm_id *listen_id) | |
1137 | { | |
1138 | struct cm_req_msg *req_msg; | |
1139 | struct ib_cm_req_event_param *param; | |
1140 | ||
1141 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1142 | param = &work->cm_event.param.req_rcvd; | |
1143 | param->listen_id = listen_id; | |
a977049d HR |
1144 | param->port = cm_id_priv->av.port->port_num; |
1145 | param->primary_path = &work->path[0]; | |
1146 | if (req_msg->alt_local_lid) | |
1147 | param->alternate_path = &work->path[1]; | |
1148 | else | |
1149 | param->alternate_path = NULL; | |
1150 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1151 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1152 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1153 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1154 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1155 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1156 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1157 | param->local_cm_response_timeout = | |
1158 | cm_req_get_remote_resp_timeout(req_msg); | |
1159 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1160 | param->remote_cm_response_timeout = | |
1161 | cm_req_get_local_resp_timeout(req_msg); | |
1162 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1163 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1164 | param->srq = cm_req_get_srq(req_msg); | |
1165 | work->cm_event.private_data = &req_msg->private_data; | |
1166 | } | |
1167 | ||
1168 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1169 | struct cm_work *work) | |
1170 | { | |
1171 | unsigned long flags; | |
1172 | int ret; | |
1173 | ||
1174 | /* We will typically only have the current event to report. */ | |
1175 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1176 | cm_free_work(work); | |
1177 | ||
1178 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
1179 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1180 | work = cm_dequeue_work(cm_id_priv); | |
1181 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1182 | BUG_ON(!work); | |
1183 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1184 | &work->cm_event); | |
1185 | cm_free_work(work); | |
1186 | } | |
1187 | cm_deref_id(cm_id_priv); | |
1188 | if (ret) | |
04c33543 | 1189 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1190 | } |
1191 | ||
1192 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1193 | struct cm_id_private *cm_id_priv, | |
1194 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1195 | const void *private_data, u8 private_data_len) | |
1196 | { | |
1197 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1198 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1199 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1200 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1201 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1202 | ||
1203 | if (private_data && private_data_len) | |
1204 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1205 | } | |
1206 | ||
1207 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1208 | struct cm_id_private *cm_id_priv, | |
1209 | enum ib_cm_rej_reason reason, | |
1210 | void *ari, | |
1211 | u8 ari_length, | |
1212 | const void *private_data, | |
1213 | u8 private_data_len) | |
1214 | { | |
1215 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1216 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1217 | ||
1218 | switch(cm_id_priv->id.state) { | |
1219 | case IB_CM_REQ_RCVD: | |
1220 | rej_msg->local_comm_id = 0; | |
1221 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1222 | break; | |
1223 | case IB_CM_MRA_REQ_SENT: | |
1224 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1225 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1226 | break; | |
1227 | case IB_CM_REP_RCVD: | |
1228 | case IB_CM_MRA_REP_SENT: | |
1229 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1230 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1231 | break; | |
1232 | default: | |
1233 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1234 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1235 | break; | |
1236 | } | |
1237 | ||
97f52eb4 | 1238 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1239 | if (ari && ari_length) { |
1240 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1241 | memcpy(rej_msg->ari, ari, ari_length); | |
1242 | } | |
1243 | ||
1244 | if (private_data && private_data_len) | |
1245 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1246 | } | |
1247 | ||
1248 | static void cm_dup_req_handler(struct cm_work *work, | |
1249 | struct cm_id_private *cm_id_priv) | |
1250 | { | |
1251 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1252 | unsigned long flags; |
1253 | int ret; | |
1254 | ||
1255 | /* Quick state check to discard duplicate REQs. */ | |
1256 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1257 | return; | |
1258 | ||
1259 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1260 | if (ret) | |
1261 | return; | |
1262 | ||
1263 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1264 | switch (cm_id_priv->id.state) { | |
1265 | case IB_CM_MRA_REQ_SENT: | |
1266 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1267 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1268 | cm_id_priv->private_data, | |
1269 | cm_id_priv->private_data_len); | |
1270 | break; | |
1271 | case IB_CM_TIMEWAIT: | |
1272 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1273 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1274 | break; | |
1275 | default: | |
1276 | goto unlock; | |
1277 | } | |
1278 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1279 | ||
34816ad9 | 1280 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1281 | if (ret) |
1282 | goto free; | |
1283 | return; | |
1284 | ||
1285 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1286 | free: cm_free_msg(msg); | |
1287 | } | |
1288 | ||
1289 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1290 | struct cm_id_private *cm_id_priv) | |
1291 | { | |
1292 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1293 | struct cm_timewait_info *timewait_info; | |
1294 | struct cm_req_msg *req_msg; | |
1295 | unsigned long flags; | |
1296 | ||
1297 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1298 | ||
1299 | /* Check for duplicate REQ and stale connections. */ | |
1300 | spin_lock_irqsave(&cm.lock, flags); | |
1301 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); | |
1302 | if (!timewait_info) | |
1303 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1304 | ||
1305 | if (timewait_info) { | |
1306 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1307 | timewait_info->work.remote_id); | |
1308 | spin_unlock_irqrestore(&cm.lock, flags); | |
1309 | if (cur_cm_id_priv) { | |
1310 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1311 | cm_deref_id(cur_cm_id_priv); | |
1312 | } else | |
1313 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1314 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1315 | NULL, 0); | |
1316 | goto error; | |
1317 | } | |
1318 | ||
1319 | /* Find matching listen request. */ | |
07d357d0 | 1320 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1321 | req_msg->service_id, |
1322 | req_msg->private_data); | |
a977049d HR |
1323 | if (!listen_cm_id_priv) { |
1324 | spin_unlock_irqrestore(&cm.lock, flags); | |
1325 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1326 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1327 | NULL, 0); | |
1328 | goto error; | |
1329 | } | |
1330 | atomic_inc(&listen_cm_id_priv->refcount); | |
1331 | atomic_inc(&cm_id_priv->refcount); | |
1332 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1333 | atomic_inc(&cm_id_priv->work_count); | |
1334 | spin_unlock_irqrestore(&cm.lock, flags); | |
1335 | return listen_cm_id_priv; | |
1336 | ||
1337 | error: cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1338 | return NULL; | |
1339 | } | |
1340 | ||
1341 | static int cm_req_handler(struct cm_work *work) | |
1342 | { | |
1343 | struct ib_cm_id *cm_id; | |
1344 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1345 | struct cm_req_msg *req_msg; | |
1346 | int ret; | |
1347 | ||
1348 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1349 | ||
07d357d0 | 1350 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
1351 | if (IS_ERR(cm_id)) |
1352 | return PTR_ERR(cm_id); | |
1353 | ||
1354 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1355 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1356 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1357 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1358 | &cm_id_priv->av); |
1359 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1360 | id.local_id); | |
1361 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1362 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1363 | goto destroy; |
a977049d HR |
1364 | } |
1365 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1366 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1367 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1368 | ||
1369 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1370 | if (!listen_cm_id_priv) { | |
1371 | ret = -EINVAL; | |
76842405 SH |
1372 | kfree(cm_id_priv->timewait_info); |
1373 | goto destroy; | |
a977049d HR |
1374 | } |
1375 | ||
1376 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1377 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1378 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1379 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1380 | |
1381 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); | |
1382 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
76842405 SH |
1383 | if (ret) { |
1384 | ib_get_cached_gid(work->port->cm_dev->device, | |
1385 | work->port->port_num, 0, &work->path[0].sgid); | |
1386 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1387 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1388 | NULL, 0); | |
1389 | goto rejected; | |
1390 | } | |
a977049d HR |
1391 | if (req_msg->alt_local_lid) { |
1392 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1393 | if (ret) { |
1394 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1395 | &work->path[0].sgid, | |
1396 | sizeof work->path[0].sgid, NULL, 0); | |
1397 | goto rejected; | |
1398 | } | |
a977049d HR |
1399 | } |
1400 | cm_id_priv->tid = req_msg->hdr.tid; | |
1401 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1402 | cm_req_get_local_resp_timeout(req_msg)); | |
1403 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1404 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1405 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1406 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1407 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
1408 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); | |
1409 | cm_id_priv->local_ack_timeout = | |
1410 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1411 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); | |
1412 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1413 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1414 | |
1415 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1416 | cm_process_work(cm_id_priv, work); | |
1417 | cm_deref_id(listen_cm_id_priv); | |
1418 | return 0; | |
1419 | ||
76842405 SH |
1420 | rejected: |
1421 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1422 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1423 | destroy: |
1424 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1425 | return ret; |
1426 | } | |
1427 | ||
1428 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1429 | struct cm_id_private *cm_id_priv, | |
1430 | struct ib_cm_rep_param *param) | |
1431 | { | |
1432 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1433 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1434 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1435 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1436 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1437 | rep_msg->resp_resources = param->responder_resources; | |
1438 | rep_msg->initiator_depth = param->initiator_depth; | |
1439 | cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); | |
1440 | cm_rep_set_failover(rep_msg, param->failover_accepted); | |
1441 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1442 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1443 | cm_rep_set_srq(rep_msg, param->srq); | |
1444 | rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
1445 | ||
1446 | if (param->private_data && param->private_data_len) | |
1447 | memcpy(rep_msg->private_data, param->private_data, | |
1448 | param->private_data_len); | |
1449 | } | |
1450 | ||
1451 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1452 | struct ib_cm_rep_param *param) | |
1453 | { | |
1454 | struct cm_id_private *cm_id_priv; | |
1455 | struct ib_mad_send_buf *msg; | |
1456 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1457 | unsigned long flags; |
1458 | int ret; | |
1459 | ||
1460 | if (param->private_data && | |
1461 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1462 | return -EINVAL; | |
1463 | ||
1464 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1465 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1466 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1467 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1468 | ret = -EINVAL; | |
1469 | goto out; | |
1470 | } | |
1471 | ||
1472 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1473 | if (ret) | |
1474 | goto out; | |
1475 | ||
1476 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1477 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1478 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1479 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1480 | ||
34816ad9 | 1481 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1482 | if (ret) { |
1483 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1484 | cm_free_msg(msg); | |
1485 | return ret; | |
1486 | } | |
1487 | ||
1488 | cm_id->state = IB_CM_REP_SENT; | |
1489 | cm_id_priv->msg = msg; | |
1490 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1491 | cm_id_priv->responder_resources = param->responder_resources; | |
1492 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1493 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1494 | ||
1495 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1496 | return ret; | |
1497 | } | |
1498 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1499 | ||
1500 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1501 | struct cm_id_private *cm_id_priv, | |
1502 | const void *private_data, | |
1503 | u8 private_data_len) | |
1504 | { | |
1505 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1506 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1507 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1508 | ||
1509 | if (private_data && private_data_len) | |
1510 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1511 | } | |
1512 | ||
1513 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1514 | const void *private_data, | |
1515 | u8 private_data_len) | |
1516 | { | |
1517 | struct cm_id_private *cm_id_priv; | |
1518 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1519 | unsigned long flags; |
1520 | void *data; | |
1521 | int ret; | |
1522 | ||
1523 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1524 | return -EINVAL; | |
1525 | ||
1526 | data = cm_copy_private_data(private_data, private_data_len); | |
1527 | if (IS_ERR(data)) | |
1528 | return PTR_ERR(data); | |
1529 | ||
1530 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1531 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1532 | if (cm_id->state != IB_CM_REP_RCVD && | |
1533 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1534 | ret = -EINVAL; | |
1535 | goto error; | |
1536 | } | |
1537 | ||
1538 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1539 | if (ret) | |
1540 | goto error; | |
1541 | ||
1542 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1543 | private_data, private_data_len); | |
1544 | ||
34816ad9 | 1545 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1546 | if (ret) { |
1547 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1548 | cm_free_msg(msg); | |
1549 | kfree(data); | |
1550 | return ret; | |
1551 | } | |
1552 | ||
1553 | cm_id->state = IB_CM_ESTABLISHED; | |
1554 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1555 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1556 | return 0; | |
1557 | ||
1558 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1559 | kfree(data); | |
1560 | return ret; | |
1561 | } | |
1562 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1563 | ||
1564 | static void cm_format_rep_event(struct cm_work *work) | |
1565 | { | |
1566 | struct cm_rep_msg *rep_msg; | |
1567 | struct ib_cm_rep_event_param *param; | |
1568 | ||
1569 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1570 | param = &work->cm_event.param.rep_rcvd; | |
1571 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1572 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1573 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1574 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1575 | param->responder_resources = rep_msg->initiator_depth; | |
1576 | param->initiator_depth = rep_msg->resp_resources; | |
1577 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1578 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1579 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1580 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1581 | param->srq = cm_rep_get_srq(rep_msg); | |
1582 | work->cm_event.private_data = &rep_msg->private_data; | |
1583 | } | |
1584 | ||
1585 | static void cm_dup_rep_handler(struct cm_work *work) | |
1586 | { | |
1587 | struct cm_id_private *cm_id_priv; | |
1588 | struct cm_rep_msg *rep_msg; | |
1589 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1590 | unsigned long flags; |
1591 | int ret; | |
1592 | ||
1593 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1594 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1595 | rep_msg->local_comm_id); | |
1596 | if (!cm_id_priv) | |
1597 | return; | |
1598 | ||
1599 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1600 | if (ret) | |
1601 | goto deref; | |
1602 | ||
1603 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1604 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) | |
1605 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1606 | cm_id_priv->private_data, | |
1607 | cm_id_priv->private_data_len); | |
1608 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1609 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1610 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1611 | cm_id_priv->private_data, | |
1612 | cm_id_priv->private_data_len); | |
1613 | else | |
1614 | goto unlock; | |
1615 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1616 | ||
34816ad9 | 1617 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1618 | if (ret) |
1619 | goto free; | |
1620 | goto deref; | |
1621 | ||
1622 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1623 | free: cm_free_msg(msg); | |
1624 | deref: cm_deref_id(cm_id_priv); | |
1625 | } | |
1626 | ||
1627 | static int cm_rep_handler(struct cm_work *work) | |
1628 | { | |
1629 | struct cm_id_private *cm_id_priv; | |
1630 | struct cm_rep_msg *rep_msg; | |
1631 | unsigned long flags; | |
1632 | int ret; | |
1633 | ||
1634 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1635 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1636 | if (!cm_id_priv) { | |
1637 | cm_dup_rep_handler(work); | |
1638 | return -EINVAL; | |
1639 | } | |
1640 | ||
87fd1a11 SH |
1641 | cm_format_rep_event(work); |
1642 | ||
1643 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1644 | switch (cm_id_priv->id.state) { | |
1645 | case IB_CM_REQ_SENT: | |
1646 | case IB_CM_MRA_REQ_RCVD: | |
1647 | break; | |
1648 | default: | |
1649 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1650 | ret = -EINVAL; | |
1651 | goto error; | |
1652 | } | |
1653 | ||
a977049d HR |
1654 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1655 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1656 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1657 | ||
87fd1a11 | 1658 | spin_lock(&cm.lock); |
a977049d HR |
1659 | /* Check for duplicate REP. */ |
1660 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1661 | spin_unlock(&cm.lock); |
1662 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1663 | ret = -EINVAL; |
1664 | goto error; | |
1665 | } | |
1666 | /* Check for a stale connection. */ | |
1667 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1668 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1669 | &cm.remote_id_table); | |
1670 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1671 | spin_unlock(&cm.lock); | |
1672 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1673 | cm_issue_rej(work->port, work->mad_recv_wc, |
1674 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1675 | NULL, 0); | |
1676 | ret = -EINVAL; | |
1677 | goto error; | |
1678 | } | |
87fd1a11 | 1679 | spin_unlock(&cm.lock); |
a977049d | 1680 | |
a977049d HR |
1681 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1682 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1683 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1684 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1685 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1686 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1687 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1688 | ||
1689 | /* todo: handle peer_to_peer */ | |
1690 | ||
34816ad9 | 1691 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1692 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1693 | if (!ret) | |
1694 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1695 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1696 | ||
1697 | if (ret) | |
1698 | cm_process_work(cm_id_priv, work); | |
1699 | else | |
1700 | cm_deref_id(cm_id_priv); | |
1701 | return 0; | |
1702 | ||
87fd1a11 | 1703 | error: |
a977049d HR |
1704 | cm_deref_id(cm_id_priv); |
1705 | return ret; | |
1706 | } | |
1707 | ||
1708 | static int cm_establish_handler(struct cm_work *work) | |
1709 | { | |
1710 | struct cm_id_private *cm_id_priv; | |
1711 | unsigned long flags; | |
1712 | int ret; | |
1713 | ||
1714 | /* See comment in ib_cm_establish about lookup. */ | |
1715 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); | |
1716 | if (!cm_id_priv) | |
1717 | return -EINVAL; | |
1718 | ||
1719 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1720 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { | |
1721 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1722 | goto out; | |
1723 | } | |
1724 | ||
34816ad9 | 1725 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1726 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1727 | if (!ret) | |
1728 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1729 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1730 | ||
1731 | if (ret) | |
1732 | cm_process_work(cm_id_priv, work); | |
1733 | else | |
1734 | cm_deref_id(cm_id_priv); | |
1735 | return 0; | |
1736 | out: | |
1737 | cm_deref_id(cm_id_priv); | |
1738 | return -EINVAL; | |
1739 | } | |
1740 | ||
1741 | static int cm_rtu_handler(struct cm_work *work) | |
1742 | { | |
1743 | struct cm_id_private *cm_id_priv; | |
1744 | struct cm_rtu_msg *rtu_msg; | |
1745 | unsigned long flags; | |
1746 | int ret; | |
1747 | ||
1748 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1749 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1750 | rtu_msg->local_comm_id); | |
1751 | if (!cm_id_priv) | |
1752 | return -EINVAL; | |
1753 | ||
1754 | work->cm_event.private_data = &rtu_msg->private_data; | |
1755 | ||
1756 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1757 | if (cm_id_priv->id.state != IB_CM_REP_SENT && | |
1758 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
1759 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1760 | goto out; | |
1761 | } | |
1762 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1763 | ||
34816ad9 | 1764 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1765 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1766 | if (!ret) | |
1767 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1768 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1769 | ||
1770 | if (ret) | |
1771 | cm_process_work(cm_id_priv, work); | |
1772 | else | |
1773 | cm_deref_id(cm_id_priv); | |
1774 | return 0; | |
1775 | out: | |
1776 | cm_deref_id(cm_id_priv); | |
1777 | return -EINVAL; | |
1778 | } | |
1779 | ||
1780 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1781 | struct cm_id_private *cm_id_priv, | |
1782 | const void *private_data, | |
1783 | u8 private_data_len) | |
1784 | { | |
1785 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1786 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1787 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1788 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1789 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1790 | ||
1791 | if (private_data && private_data_len) | |
1792 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1793 | } | |
1794 | ||
1795 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1796 | const void *private_data, | |
1797 | u8 private_data_len) | |
1798 | { | |
1799 | struct cm_id_private *cm_id_priv; | |
1800 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1801 | unsigned long flags; |
1802 | int ret; | |
1803 | ||
1804 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1805 | return -EINVAL; | |
1806 | ||
1807 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1808 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1809 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1810 | ret = -EINVAL; | |
1811 | goto out; | |
1812 | } | |
1813 | ||
1814 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1815 | if (ret) { | |
1816 | cm_enter_timewait(cm_id_priv); | |
1817 | goto out; | |
1818 | } | |
1819 | ||
1820 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1821 | private_data, private_data_len); | |
34816ad9 | 1822 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1823 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
1824 | ||
34816ad9 | 1825 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1826 | if (ret) { |
1827 | cm_enter_timewait(cm_id_priv); | |
1828 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1829 | cm_free_msg(msg); | |
1830 | return ret; | |
1831 | } | |
1832 | ||
1833 | cm_id->state = IB_CM_DREQ_SENT; | |
1834 | cm_id_priv->msg = msg; | |
1835 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1836 | return ret; | |
1837 | } | |
1838 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1839 | ||
1840 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1841 | struct cm_id_private *cm_id_priv, | |
1842 | const void *private_data, | |
1843 | u8 private_data_len) | |
1844 | { | |
1845 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1846 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1847 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1848 | ||
1849 | if (private_data && private_data_len) | |
1850 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
1851 | } | |
1852 | ||
1853 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
1854 | const void *private_data, | |
1855 | u8 private_data_len) | |
1856 | { | |
1857 | struct cm_id_private *cm_id_priv; | |
1858 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1859 | unsigned long flags; |
1860 | void *data; | |
1861 | int ret; | |
1862 | ||
1863 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
1864 | return -EINVAL; | |
1865 | ||
1866 | data = cm_copy_private_data(private_data, private_data_len); | |
1867 | if (IS_ERR(data)) | |
1868 | return PTR_ERR(data); | |
1869 | ||
1870 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1871 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1872 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
1873 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1874 | kfree(data); | |
1875 | return -EINVAL; | |
1876 | } | |
1877 | ||
1878 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1879 | cm_enter_timewait(cm_id_priv); | |
1880 | ||
1881 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1882 | if (ret) | |
1883 | goto out; | |
1884 | ||
1885 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1886 | private_data, private_data_len); | |
1887 | ||
34816ad9 | 1888 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1889 | if (ret) { |
1890 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1891 | cm_free_msg(msg); | |
1892 | return ret; | |
1893 | } | |
1894 | ||
1895 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1896 | return ret; | |
1897 | } | |
1898 | EXPORT_SYMBOL(ib_send_cm_drep); | |
1899 | ||
1900 | static int cm_dreq_handler(struct cm_work *work) | |
1901 | { | |
1902 | struct cm_id_private *cm_id_priv; | |
1903 | struct cm_dreq_msg *dreq_msg; | |
1904 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1905 | unsigned long flags; |
1906 | int ret; | |
1907 | ||
1908 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
1909 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
1910 | dreq_msg->local_comm_id); | |
1911 | if (!cm_id_priv) | |
1912 | return -EINVAL; | |
1913 | ||
1914 | work->cm_event.private_data = &dreq_msg->private_data; | |
1915 | ||
1916 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1917 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) | |
1918 | goto unlock; | |
1919 | ||
1920 | switch (cm_id_priv->id.state) { | |
1921 | case IB_CM_REP_SENT: | |
1922 | case IB_CM_DREQ_SENT: | |
34816ad9 | 1923 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1924 | break; |
1925 | case IB_CM_ESTABLISHED: | |
1926 | case IB_CM_MRA_REP_RCVD: | |
1927 | break; | |
1928 | case IB_CM_TIMEWAIT: | |
1929 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
1930 | goto unlock; | |
1931 | ||
1932 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1933 | cm_id_priv->private_data, | |
1934 | cm_id_priv->private_data_len); | |
1935 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1936 | ||
34816ad9 | 1937 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
1938 | cm_free_msg(msg); |
1939 | goto deref; | |
1940 | default: | |
1941 | goto unlock; | |
1942 | } | |
1943 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
1944 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
1945 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1946 | if (!ret) | |
1947 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1948 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1949 | ||
1950 | if (ret) | |
1951 | cm_process_work(cm_id_priv, work); | |
1952 | else | |
1953 | cm_deref_id(cm_id_priv); | |
1954 | return 0; | |
1955 | ||
1956 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1957 | deref: cm_deref_id(cm_id_priv); | |
1958 | return -EINVAL; | |
1959 | } | |
1960 | ||
1961 | static int cm_drep_handler(struct cm_work *work) | |
1962 | { | |
1963 | struct cm_id_private *cm_id_priv; | |
1964 | struct cm_drep_msg *drep_msg; | |
1965 | unsigned long flags; | |
1966 | int ret; | |
1967 | ||
1968 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1969 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
1970 | drep_msg->local_comm_id); | |
1971 | if (!cm_id_priv) | |
1972 | return -EINVAL; | |
1973 | ||
1974 | work->cm_event.private_data = &drep_msg->private_data; | |
1975 | ||
1976 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1977 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && | |
1978 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
1979 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1980 | goto out; | |
1981 | } | |
1982 | cm_enter_timewait(cm_id_priv); | |
1983 | ||
34816ad9 | 1984 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1985 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1986 | if (!ret) | |
1987 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1988 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1989 | ||
1990 | if (ret) | |
1991 | cm_process_work(cm_id_priv, work); | |
1992 | else | |
1993 | cm_deref_id(cm_id_priv); | |
1994 | return 0; | |
1995 | out: | |
1996 | cm_deref_id(cm_id_priv); | |
1997 | return -EINVAL; | |
1998 | } | |
1999 | ||
2000 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2001 | enum ib_cm_rej_reason reason, | |
2002 | void *ari, | |
2003 | u8 ari_length, | |
2004 | const void *private_data, | |
2005 | u8 private_data_len) | |
2006 | { | |
2007 | struct cm_id_private *cm_id_priv; | |
2008 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2009 | unsigned long flags; |
2010 | int ret; | |
2011 | ||
2012 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2013 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2014 | return -EINVAL; | |
2015 | ||
2016 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2017 | ||
2018 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2019 | switch (cm_id->state) { | |
2020 | case IB_CM_REQ_SENT: | |
2021 | case IB_CM_MRA_REQ_RCVD: | |
2022 | case IB_CM_REQ_RCVD: | |
2023 | case IB_CM_MRA_REQ_SENT: | |
2024 | case IB_CM_REP_RCVD: | |
2025 | case IB_CM_MRA_REP_SENT: | |
2026 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2027 | if (!ret) | |
2028 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2029 | cm_id_priv, reason, ari, ari_length, | |
2030 | private_data, private_data_len); | |
2031 | ||
2032 | cm_reset_to_idle(cm_id_priv); | |
2033 | break; | |
2034 | case IB_CM_REP_SENT: | |
2035 | case IB_CM_MRA_REP_RCVD: | |
2036 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2037 | if (!ret) | |
2038 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2039 | cm_id_priv, reason, ari, ari_length, | |
2040 | private_data, private_data_len); | |
2041 | ||
2042 | cm_enter_timewait(cm_id_priv); | |
2043 | break; | |
2044 | default: | |
2045 | ret = -EINVAL; | |
2046 | goto out; | |
2047 | } | |
2048 | ||
2049 | if (ret) | |
2050 | goto out; | |
2051 | ||
34816ad9 | 2052 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2053 | if (ret) |
2054 | cm_free_msg(msg); | |
2055 | ||
2056 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2057 | return ret; | |
2058 | } | |
2059 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2060 | ||
2061 | static void cm_format_rej_event(struct cm_work *work) | |
2062 | { | |
2063 | struct cm_rej_msg *rej_msg; | |
2064 | struct ib_cm_rej_event_param *param; | |
2065 | ||
2066 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2067 | param = &work->cm_event.param.rej_rcvd; | |
2068 | param->ari = rej_msg->ari; | |
2069 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2070 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2071 | work->cm_event.private_data = &rej_msg->private_data; |
2072 | } | |
2073 | ||
2074 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2075 | { | |
2076 | struct cm_timewait_info *timewait_info; | |
2077 | struct cm_id_private *cm_id_priv; | |
2078 | unsigned long flags; | |
97f52eb4 | 2079 | __be32 remote_id; |
a977049d HR |
2080 | |
2081 | remote_id = rej_msg->local_comm_id; | |
2082 | ||
97f52eb4 | 2083 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
a977049d | 2084 | spin_lock_irqsave(&cm.lock, flags); |
97f52eb4 | 2085 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2086 | remote_id); |
2087 | if (!timewait_info) { | |
2088 | spin_unlock_irqrestore(&cm.lock, flags); | |
2089 | return NULL; | |
2090 | } | |
f06d2653 SH |
2091 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2092 | (timewait_info->work.local_id ^ | |
2093 | cm.random_id_operand)); | |
a977049d HR |
2094 | if (cm_id_priv) { |
2095 | if (cm_id_priv->id.remote_id == remote_id) | |
2096 | atomic_inc(&cm_id_priv->refcount); | |
2097 | else | |
2098 | cm_id_priv = NULL; | |
2099 | } | |
2100 | spin_unlock_irqrestore(&cm.lock, flags); | |
2101 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) | |
2102 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2103 | else | |
2104 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2105 | ||
2106 | return cm_id_priv; | |
2107 | } | |
2108 | ||
2109 | static int cm_rej_handler(struct cm_work *work) | |
2110 | { | |
2111 | struct cm_id_private *cm_id_priv; | |
2112 | struct cm_rej_msg *rej_msg; | |
2113 | unsigned long flags; | |
2114 | int ret; | |
2115 | ||
2116 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2117 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2118 | if (!cm_id_priv) | |
2119 | return -EINVAL; | |
2120 | ||
2121 | cm_format_rej_event(work); | |
2122 | ||
2123 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2124 | switch (cm_id_priv->id.state) { | |
2125 | case IB_CM_REQ_SENT: | |
2126 | case IB_CM_MRA_REQ_RCVD: | |
2127 | case IB_CM_REP_SENT: | |
2128 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2129 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2130 | /* fall through */ |
2131 | case IB_CM_REQ_RCVD: | |
2132 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2133 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2134 | cm_enter_timewait(cm_id_priv); |
2135 | else | |
2136 | cm_reset_to_idle(cm_id_priv); | |
2137 | break; | |
2138 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2139 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2140 | /* fall through */ |
2141 | case IB_CM_REP_RCVD: | |
2142 | case IB_CM_MRA_REP_SENT: | |
2143 | case IB_CM_ESTABLISHED: | |
2144 | cm_enter_timewait(cm_id_priv); | |
2145 | break; | |
2146 | default: | |
2147 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2148 | ret = -EINVAL; | |
2149 | goto out; | |
2150 | } | |
2151 | ||
2152 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2153 | if (!ret) | |
2154 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2155 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2156 | ||
2157 | if (ret) | |
2158 | cm_process_work(cm_id_priv, work); | |
2159 | else | |
2160 | cm_deref_id(cm_id_priv); | |
2161 | return 0; | |
2162 | out: | |
2163 | cm_deref_id(cm_id_priv); | |
2164 | return -EINVAL; | |
2165 | } | |
2166 | ||
2167 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2168 | u8 service_timeout, | |
2169 | const void *private_data, | |
2170 | u8 private_data_len) | |
2171 | { | |
2172 | struct cm_id_private *cm_id_priv; | |
2173 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2174 | void *data; |
2175 | unsigned long flags; | |
2176 | int ret; | |
2177 | ||
2178 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2179 | return -EINVAL; | |
2180 | ||
2181 | data = cm_copy_private_data(private_data, private_data_len); | |
2182 | if (IS_ERR(data)) | |
2183 | return PTR_ERR(data); | |
2184 | ||
2185 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2186 | ||
2187 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2188 | switch(cm_id_priv->id.state) { | |
2189 | case IB_CM_REQ_RCVD: | |
2190 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2191 | if (ret) | |
2192 | goto error1; | |
2193 | ||
2194 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2195 | CM_MSG_RESPONSE_REQ, service_timeout, | |
2196 | private_data, private_data_len); | |
34816ad9 | 2197 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2198 | if (ret) |
2199 | goto error2; | |
2200 | cm_id->state = IB_CM_MRA_REQ_SENT; | |
2201 | break; | |
2202 | case IB_CM_REP_RCVD: | |
2203 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2204 | if (ret) | |
2205 | goto error1; | |
2206 | ||
2207 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2208 | CM_MSG_RESPONSE_REP, service_timeout, | |
2209 | private_data, private_data_len); | |
34816ad9 | 2210 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2211 | if (ret) |
2212 | goto error2; | |
2213 | cm_id->state = IB_CM_MRA_REP_SENT; | |
2214 | break; | |
2215 | case IB_CM_ESTABLISHED: | |
2216 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2217 | if (ret) | |
2218 | goto error1; | |
2219 | ||
2220 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2221 | CM_MSG_RESPONSE_OTHER, service_timeout, | |
2222 | private_data, private_data_len); | |
34816ad9 | 2223 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2224 | if (ret) |
2225 | goto error2; | |
2226 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; | |
2227 | break; | |
2228 | default: | |
2229 | ret = -EINVAL; | |
2230 | goto error1; | |
2231 | } | |
2232 | cm_id_priv->service_timeout = service_timeout; | |
2233 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2234 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2235 | return 0; | |
2236 | ||
2237 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2238 | kfree(data); | |
2239 | return ret; | |
2240 | ||
2241 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2242 | kfree(data); | |
2243 | cm_free_msg(msg); | |
2244 | return ret; | |
2245 | } | |
2246 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2247 | ||
2248 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2249 | { | |
2250 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2251 | case CM_MSG_RESPONSE_REQ: | |
2252 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2253 | case CM_MSG_RESPONSE_REP: | |
2254 | case CM_MSG_RESPONSE_OTHER: | |
2255 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2256 | mra_msg->local_comm_id); | |
2257 | default: | |
2258 | return NULL; | |
2259 | } | |
2260 | } | |
2261 | ||
2262 | static int cm_mra_handler(struct cm_work *work) | |
2263 | { | |
2264 | struct cm_id_private *cm_id_priv; | |
2265 | struct cm_mra_msg *mra_msg; | |
2266 | unsigned long flags; | |
2267 | int timeout, ret; | |
2268 | ||
2269 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2270 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2271 | if (!cm_id_priv) | |
2272 | return -EINVAL; | |
2273 | ||
2274 | work->cm_event.private_data = &mra_msg->private_data; | |
2275 | work->cm_event.param.mra_rcvd.service_timeout = | |
2276 | cm_mra_get_service_timeout(mra_msg); | |
2277 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
2278 | cm_convert_to_ms(cm_id_priv->av.packet_life_time); | |
2279 | ||
2280 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2281 | switch (cm_id_priv->id.state) { | |
2282 | case IB_CM_REQ_SENT: | |
2283 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2284 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2285 | cm_id_priv->msg, timeout)) |
a977049d HR |
2286 | goto out; |
2287 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2288 | break; | |
2289 | case IB_CM_REP_SENT: | |
2290 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2291 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2292 | cm_id_priv->msg, timeout)) |
a977049d HR |
2293 | goto out; |
2294 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2295 | break; | |
2296 | case IB_CM_ESTABLISHED: | |
2297 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2298 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2299 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2300 | cm_id_priv->msg, timeout)) |
a977049d HR |
2301 | goto out; |
2302 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; | |
2303 | break; | |
2304 | default: | |
2305 | goto out; | |
2306 | } | |
2307 | ||
2308 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2309 | cm_id_priv->id.state; | |
2310 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2311 | if (!ret) | |
2312 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2313 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2314 | ||
2315 | if (ret) | |
2316 | cm_process_work(cm_id_priv, work); | |
2317 | else | |
2318 | cm_deref_id(cm_id_priv); | |
2319 | return 0; | |
2320 | out: | |
2321 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2322 | cm_deref_id(cm_id_priv); | |
2323 | return -EINVAL; | |
2324 | } | |
2325 | ||
2326 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2327 | struct cm_id_private *cm_id_priv, | |
2328 | struct ib_sa_path_rec *alternate_path, | |
2329 | const void *private_data, | |
2330 | u8 private_data_len) | |
2331 | { | |
2332 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2333 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2334 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2335 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2336 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2337 | /* todo: need remote CM response timeout */ | |
2338 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2339 | lap_msg->alt_local_lid = alternate_path->slid; | |
2340 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2341 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2342 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2343 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2344 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2345 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2346 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2347 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2348 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2349 | cm_lap_set_local_ack_timeout(lap_msg, | |
2350 | min(31, alternate_path->packet_life_time + 1)); | |
2351 | ||
2352 | if (private_data && private_data_len) | |
2353 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2354 | } | |
2355 | ||
2356 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2357 | struct ib_sa_path_rec *alternate_path, | |
2358 | const void *private_data, | |
2359 | u8 private_data_len) | |
2360 | { | |
2361 | struct cm_id_private *cm_id_priv; | |
2362 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2363 | unsigned long flags; |
2364 | int ret; | |
2365 | ||
2366 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2367 | return -EINVAL; | |
2368 | ||
2369 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2370 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2371 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2372 | cm_id->lap_state != IB_CM_LAP_IDLE) { | |
2373 | ret = -EINVAL; | |
2374 | goto out; | |
2375 | } | |
2376 | ||
2377 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2378 | if (ret) | |
2379 | goto out; | |
2380 | ||
2381 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2382 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2383 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2384 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2385 | ||
34816ad9 | 2386 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2387 | if (ret) { |
2388 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2389 | cm_free_msg(msg); | |
2390 | return ret; | |
2391 | } | |
2392 | ||
2393 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2394 | cm_id_priv->msg = msg; | |
2395 | ||
2396 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2397 | return ret; | |
2398 | } | |
2399 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2400 | ||
2401 | static void cm_format_path_from_lap(struct ib_sa_path_rec *path, | |
2402 | struct cm_lap_msg *lap_msg) | |
2403 | { | |
2404 | memset(path, 0, sizeof *path); | |
2405 | path->dgid = lap_msg->alt_local_gid; | |
2406 | path->sgid = lap_msg->alt_remote_gid; | |
2407 | path->dlid = lap_msg->alt_local_lid; | |
2408 | path->slid = lap_msg->alt_remote_lid; | |
2409 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2410 | path->hop_limit = lap_msg->alt_hop_limit; | |
2411 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2412 | path->reversible = 1; | |
2413 | /* pkey is same as in REQ */ | |
2414 | path->sl = cm_lap_get_sl(lap_msg); | |
2415 | path->mtu_selector = IB_SA_EQ; | |
2416 | /* mtu is same as in REQ */ | |
2417 | path->rate_selector = IB_SA_EQ; | |
2418 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2419 | path->packet_life_time_selector = IB_SA_EQ; | |
2420 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2421 | path->packet_life_time -= (path->packet_life_time > 0); | |
2422 | } | |
2423 | ||
2424 | static int cm_lap_handler(struct cm_work *work) | |
2425 | { | |
2426 | struct cm_id_private *cm_id_priv; | |
2427 | struct cm_lap_msg *lap_msg; | |
2428 | struct ib_cm_lap_event_param *param; | |
2429 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2430 | unsigned long flags; |
2431 | int ret; | |
2432 | ||
2433 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2434 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2435 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2436 | lap_msg->local_comm_id); | |
2437 | if (!cm_id_priv) | |
2438 | return -EINVAL; | |
2439 | ||
2440 | param = &work->cm_event.param.lap_rcvd; | |
2441 | param->alternate_path = &work->path[0]; | |
2442 | cm_format_path_from_lap(param->alternate_path, lap_msg); | |
2443 | work->cm_event.private_data = &lap_msg->private_data; | |
2444 | ||
2445 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2446 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) | |
2447 | goto unlock; | |
2448 | ||
2449 | switch (cm_id_priv->id.lap_state) { | |
2450 | case IB_CM_LAP_IDLE: | |
2451 | break; | |
2452 | case IB_CM_MRA_LAP_SENT: | |
2453 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
2454 | goto unlock; | |
2455 | ||
2456 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2457 | CM_MSG_RESPONSE_OTHER, | |
2458 | cm_id_priv->service_timeout, | |
2459 | cm_id_priv->private_data, | |
2460 | cm_id_priv->private_data_len); | |
2461 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2462 | ||
34816ad9 | 2463 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2464 | cm_free_msg(msg); |
2465 | goto deref; | |
2466 | default: | |
2467 | goto unlock; | |
2468 | } | |
2469 | ||
2470 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2471 | cm_id_priv->tid = lap_msg->hdr.tid; | |
2472 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2473 | if (!ret) | |
2474 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2475 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2476 | ||
2477 | if (ret) | |
2478 | cm_process_work(cm_id_priv, work); | |
2479 | else | |
2480 | cm_deref_id(cm_id_priv); | |
2481 | return 0; | |
2482 | ||
2483 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2484 | deref: cm_deref_id(cm_id_priv); | |
2485 | return -EINVAL; | |
2486 | } | |
2487 | ||
2488 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2489 | struct cm_id_private *cm_id_priv, | |
2490 | enum ib_cm_apr_status status, | |
2491 | void *info, | |
2492 | u8 info_length, | |
2493 | const void *private_data, | |
2494 | u8 private_data_len) | |
2495 | { | |
2496 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2497 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2498 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2499 | apr_msg->ap_status = (u8) status; | |
2500 | ||
2501 | if (info && info_length) { | |
2502 | apr_msg->info_length = info_length; | |
2503 | memcpy(apr_msg->info, info, info_length); | |
2504 | } | |
2505 | ||
2506 | if (private_data && private_data_len) | |
2507 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2508 | } | |
2509 | ||
2510 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2511 | enum ib_cm_apr_status status, | |
2512 | void *info, | |
2513 | u8 info_length, | |
2514 | const void *private_data, | |
2515 | u8 private_data_len) | |
2516 | { | |
2517 | struct cm_id_private *cm_id_priv; | |
2518 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2519 | unsigned long flags; |
2520 | int ret; | |
2521 | ||
2522 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2523 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2524 | return -EINVAL; | |
2525 | ||
2526 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2527 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2528 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2529 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2530 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2531 | ret = -EINVAL; | |
2532 | goto out; | |
2533 | } | |
2534 | ||
2535 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2536 | if (ret) | |
2537 | goto out; | |
2538 | ||
2539 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2540 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2541 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2542 | if (ret) { |
2543 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2544 | cm_free_msg(msg); | |
2545 | return ret; | |
2546 | } | |
2547 | ||
2548 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2549 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2550 | return ret; | |
2551 | } | |
2552 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2553 | ||
2554 | static int cm_apr_handler(struct cm_work *work) | |
2555 | { | |
2556 | struct cm_id_private *cm_id_priv; | |
2557 | struct cm_apr_msg *apr_msg; | |
2558 | unsigned long flags; | |
2559 | int ret; | |
2560 | ||
2561 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2562 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2563 | apr_msg->local_comm_id); | |
2564 | if (!cm_id_priv) | |
2565 | return -EINVAL; /* Unmatched reply. */ | |
2566 | ||
2567 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2568 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2569 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2570 | work->cm_event.private_data = &apr_msg->private_data; | |
2571 | ||
2572 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2573 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || | |
2574 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2575 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
2576 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2577 | goto out; | |
2578 | } | |
2579 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2580 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2581 | cm_id_priv->msg = NULL; |
2582 | ||
2583 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2584 | if (!ret) | |
2585 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2586 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2587 | ||
2588 | if (ret) | |
2589 | cm_process_work(cm_id_priv, work); | |
2590 | else | |
2591 | cm_deref_id(cm_id_priv); | |
2592 | return 0; | |
2593 | out: | |
2594 | cm_deref_id(cm_id_priv); | |
2595 | return -EINVAL; | |
2596 | } | |
2597 | ||
2598 | static int cm_timewait_handler(struct cm_work *work) | |
2599 | { | |
2600 | struct cm_timewait_info *timewait_info; | |
2601 | struct cm_id_private *cm_id_priv; | |
2602 | unsigned long flags; | |
2603 | int ret; | |
2604 | ||
2605 | timewait_info = (struct cm_timewait_info *)work; | |
2606 | cm_cleanup_timewait(timewait_info); | |
2607 | ||
2608 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2609 | timewait_info->work.remote_id); | |
2610 | if (!cm_id_priv) | |
2611 | return -EINVAL; | |
2612 | ||
2613 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2614 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || | |
2615 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
2616 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2617 | goto out; | |
2618 | } | |
2619 | cm_id_priv->id.state = IB_CM_IDLE; | |
2620 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2621 | if (!ret) | |
2622 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2623 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2624 | ||
2625 | if (ret) | |
2626 | cm_process_work(cm_id_priv, work); | |
2627 | else | |
2628 | cm_deref_id(cm_id_priv); | |
2629 | return 0; | |
2630 | out: | |
2631 | cm_deref_id(cm_id_priv); | |
2632 | return -EINVAL; | |
2633 | } | |
2634 | ||
2635 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2636 | struct cm_id_private *cm_id_priv, | |
2637 | struct ib_cm_sidr_req_param *param) | |
2638 | { | |
2639 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2640 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2641 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
75af9088 | 2642 | sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
a977049d HR |
2643 | sidr_req_msg->service_id = param->service_id; |
2644 | ||
2645 | if (param->private_data && param->private_data_len) | |
2646 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2647 | param->private_data_len); | |
2648 | } | |
2649 | ||
2650 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2651 | struct ib_cm_sidr_req_param *param) | |
2652 | { | |
2653 | struct cm_id_private *cm_id_priv; | |
2654 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2655 | unsigned long flags; |
2656 | int ret; | |
2657 | ||
2658 | if (!param->path || (param->private_data && | |
2659 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2660 | return -EINVAL; | |
2661 | ||
2662 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2663 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2664 | if (ret) | |
2665 | goto out; | |
2666 | ||
2667 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2668 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2669 | cm_id_priv->timeout_ms = param->timeout_ms; |
2670 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2671 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2672 | if (ret) | |
2673 | goto out; | |
2674 | ||
2675 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2676 | param); | |
34816ad9 | 2677 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2678 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2679 | ||
2680 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2681 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2682 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2683 | else |
2684 | ret = -EINVAL; | |
2685 | ||
2686 | if (ret) { | |
2687 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2688 | cm_free_msg(msg); | |
2689 | goto out; | |
2690 | } | |
2691 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2692 | cm_id_priv->msg = msg; | |
2693 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2694 | out: | |
2695 | return ret; | |
2696 | } | |
2697 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2698 | ||
2699 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2700 | struct ib_cm_id *listen_id) | |
2701 | { | |
2702 | struct cm_sidr_req_msg *sidr_req_msg; | |
2703 | struct ib_cm_sidr_req_event_param *param; | |
2704 | ||
2705 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2706 | work->mad_recv_wc->recv_buf.mad; | |
2707 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2708 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2709 | param->listen_id = listen_id; |
a977049d HR |
2710 | param->port = work->port->port_num; |
2711 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2712 | } | |
2713 | ||
2714 | static int cm_sidr_req_handler(struct cm_work *work) | |
2715 | { | |
2716 | struct ib_cm_id *cm_id; | |
2717 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2718 | struct cm_sidr_req_msg *sidr_req_msg; | |
2719 | struct ib_wc *wc; | |
2720 | unsigned long flags; | |
2721 | ||
07d357d0 | 2722 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
2723 | if (IS_ERR(cm_id)) |
2724 | return PTR_ERR(cm_id); | |
2725 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2726 | ||
2727 | /* Record SGID/SLID and request ID for lookup. */ | |
2728 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2729 | work->mad_recv_wc->recv_buf.mad; | |
2730 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2731 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2732 | cm_id_priv->av.dgid.global.interface_id = 0; |
2733 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 2734 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
2735 | &cm_id_priv->av); |
2736 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
2737 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; | |
2738 | cm_id_priv->tid = sidr_req_msg->hdr.tid; | |
2739 | atomic_inc(&cm_id_priv->work_count); | |
2740 | ||
2741 | spin_lock_irqsave(&cm.lock, flags); | |
2742 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); | |
2743 | if (cur_cm_id_priv) { | |
2744 | spin_unlock_irqrestore(&cm.lock, flags); | |
2745 | goto out; /* Duplicate message. */ | |
2746 | } | |
07d357d0 | 2747 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
2748 | sidr_req_msg->service_id, |
2749 | sidr_req_msg->private_data); | |
a977049d HR |
2750 | if (!cur_cm_id_priv) { |
2751 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2752 | spin_unlock_irqrestore(&cm.lock, flags); | |
2753 | /* todo: reply with no match */ | |
2754 | goto out; /* No match. */ | |
2755 | } | |
2756 | atomic_inc(&cur_cm_id_priv->refcount); | |
2757 | spin_unlock_irqrestore(&cm.lock, flags); | |
2758 | ||
2759 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2760 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2761 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2762 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2763 | |
2764 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2765 | cm_process_work(cm_id_priv, work); | |
2766 | cm_deref_id(cur_cm_id_priv); | |
2767 | return 0; | |
2768 | out: | |
2769 | ib_destroy_cm_id(&cm_id_priv->id); | |
2770 | return -EINVAL; | |
2771 | } | |
2772 | ||
2773 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2774 | struct cm_id_private *cm_id_priv, | |
2775 | struct ib_cm_sidr_rep_param *param) | |
2776 | { | |
2777 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2778 | cm_id_priv->tid); | |
2779 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2780 | sidr_rep_msg->status = param->status; | |
2781 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2782 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2783 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2784 | ||
2785 | if (param->info && param->info_length) | |
2786 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2787 | ||
2788 | if (param->private_data && param->private_data_len) | |
2789 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2790 | param->private_data_len); | |
2791 | } | |
2792 | ||
2793 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
2794 | struct ib_cm_sidr_rep_param *param) | |
2795 | { | |
2796 | struct cm_id_private *cm_id_priv; | |
2797 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2798 | unsigned long flags; |
2799 | int ret; | |
2800 | ||
2801 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
2802 | (param->private_data && | |
2803 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
2804 | return -EINVAL; | |
2805 | ||
2806 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2807 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2808 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
2809 | ret = -EINVAL; | |
2810 | goto error; | |
2811 | } | |
2812 | ||
2813 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2814 | if (ret) | |
2815 | goto error; | |
2816 | ||
2817 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
2818 | param); | |
34816ad9 | 2819 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2820 | if (ret) { |
2821 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2822 | cm_free_msg(msg); | |
2823 | return ret; | |
2824 | } | |
2825 | cm_id->state = IB_CM_IDLE; | |
2826 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2827 | ||
2828 | spin_lock_irqsave(&cm.lock, flags); | |
2829 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2830 | spin_unlock_irqrestore(&cm.lock, flags); | |
2831 | return 0; | |
2832 | ||
2833 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2834 | return ret; | |
2835 | } | |
2836 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
2837 | ||
2838 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
2839 | { | |
2840 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2841 | struct ib_cm_sidr_rep_event_param *param; | |
2842 | ||
2843 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2844 | work->mad_recv_wc->recv_buf.mad; | |
2845 | param = &work->cm_event.param.sidr_rep_rcvd; | |
2846 | param->status = sidr_rep_msg->status; | |
2847 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
2848 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
2849 | param->info = &sidr_rep_msg->info; | |
2850 | param->info_len = sidr_rep_msg->info_length; | |
2851 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
2852 | } | |
2853 | ||
2854 | static int cm_sidr_rep_handler(struct cm_work *work) | |
2855 | { | |
2856 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2857 | struct cm_id_private *cm_id_priv; | |
2858 | unsigned long flags; | |
2859 | ||
2860 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2861 | work->mad_recv_wc->recv_buf.mad; | |
2862 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
2863 | if (!cm_id_priv) | |
2864 | return -EINVAL; /* Unmatched reply. */ | |
2865 | ||
2866 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2867 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { | |
2868 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2869 | goto out; | |
2870 | } | |
2871 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 2872 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2873 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
2874 | ||
2875 | cm_format_sidr_rep_event(work); | |
2876 | cm_process_work(cm_id_priv, work); | |
2877 | return 0; | |
2878 | out: | |
2879 | cm_deref_id(cm_id_priv); | |
2880 | return -EINVAL; | |
2881 | } | |
2882 | ||
2883 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
2884 | enum ib_wc_status wc_status) | |
2885 | { | |
2886 | struct cm_id_private *cm_id_priv; | |
2887 | struct ib_cm_event cm_event; | |
2888 | enum ib_cm_state state; | |
2889 | unsigned long flags; | |
2890 | int ret; | |
2891 | ||
2892 | memset(&cm_event, 0, sizeof cm_event); | |
2893 | cm_id_priv = msg->context[0]; | |
2894 | ||
2895 | /* Discard old sends or ones without a response. */ | |
2896 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2897 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; | |
2898 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
2899 | goto discard; | |
2900 | ||
2901 | switch (state) { | |
2902 | case IB_CM_REQ_SENT: | |
2903 | case IB_CM_MRA_REQ_RCVD: | |
2904 | cm_reset_to_idle(cm_id_priv); | |
2905 | cm_event.event = IB_CM_REQ_ERROR; | |
2906 | break; | |
2907 | case IB_CM_REP_SENT: | |
2908 | case IB_CM_MRA_REP_RCVD: | |
2909 | cm_reset_to_idle(cm_id_priv); | |
2910 | cm_event.event = IB_CM_REP_ERROR; | |
2911 | break; | |
2912 | case IB_CM_DREQ_SENT: | |
2913 | cm_enter_timewait(cm_id_priv); | |
2914 | cm_event.event = IB_CM_DREQ_ERROR; | |
2915 | break; | |
2916 | case IB_CM_SIDR_REQ_SENT: | |
2917 | cm_id_priv->id.state = IB_CM_IDLE; | |
2918 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
2919 | break; | |
2920 | default: | |
2921 | goto discard; | |
2922 | } | |
2923 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2924 | cm_event.param.send_status = wc_status; | |
2925 | ||
2926 | /* No other events can occur on the cm_id at this point. */ | |
2927 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
2928 | cm_free_msg(msg); | |
2929 | if (ret) | |
2930 | ib_destroy_cm_id(&cm_id_priv->id); | |
2931 | return; | |
2932 | discard: | |
2933 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2934 | cm_free_msg(msg); | |
2935 | } | |
2936 | ||
2937 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
2938 | struct ib_mad_send_wc *mad_send_wc) | |
2939 | { | |
34816ad9 | 2940 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
a977049d HR |
2941 | |
2942 | switch (mad_send_wc->status) { | |
2943 | case IB_WC_SUCCESS: | |
2944 | case IB_WC_WR_FLUSH_ERR: | |
2945 | cm_free_msg(msg); | |
2946 | break; | |
2947 | default: | |
2948 | if (msg->context[0] && msg->context[1]) | |
2949 | cm_process_send_error(msg, mad_send_wc->status); | |
2950 | else | |
2951 | cm_free_msg(msg); | |
2952 | break; | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | static void cm_work_handler(void *data) | |
2957 | { | |
2958 | struct cm_work *work = data; | |
2959 | int ret; | |
2960 | ||
2961 | switch (work->cm_event.event) { | |
2962 | case IB_CM_REQ_RECEIVED: | |
2963 | ret = cm_req_handler(work); | |
2964 | break; | |
2965 | case IB_CM_MRA_RECEIVED: | |
2966 | ret = cm_mra_handler(work); | |
2967 | break; | |
2968 | case IB_CM_REJ_RECEIVED: | |
2969 | ret = cm_rej_handler(work); | |
2970 | break; | |
2971 | case IB_CM_REP_RECEIVED: | |
2972 | ret = cm_rep_handler(work); | |
2973 | break; | |
2974 | case IB_CM_RTU_RECEIVED: | |
2975 | ret = cm_rtu_handler(work); | |
2976 | break; | |
2977 | case IB_CM_USER_ESTABLISHED: | |
2978 | ret = cm_establish_handler(work); | |
2979 | break; | |
2980 | case IB_CM_DREQ_RECEIVED: | |
2981 | ret = cm_dreq_handler(work); | |
2982 | break; | |
2983 | case IB_CM_DREP_RECEIVED: | |
2984 | ret = cm_drep_handler(work); | |
2985 | break; | |
2986 | case IB_CM_SIDR_REQ_RECEIVED: | |
2987 | ret = cm_sidr_req_handler(work); | |
2988 | break; | |
2989 | case IB_CM_SIDR_REP_RECEIVED: | |
2990 | ret = cm_sidr_rep_handler(work); | |
2991 | break; | |
2992 | case IB_CM_LAP_RECEIVED: | |
2993 | ret = cm_lap_handler(work); | |
2994 | break; | |
2995 | case IB_CM_APR_RECEIVED: | |
2996 | ret = cm_apr_handler(work); | |
2997 | break; | |
2998 | case IB_CM_TIMEWAIT_EXIT: | |
2999 | ret = cm_timewait_handler(work); | |
3000 | break; | |
3001 | default: | |
3002 | ret = -EINVAL; | |
3003 | break; | |
3004 | } | |
3005 | if (ret) | |
3006 | cm_free_work(work); | |
3007 | } | |
3008 | ||
3009 | int ib_cm_establish(struct ib_cm_id *cm_id) | |
3010 | { | |
3011 | struct cm_id_private *cm_id_priv; | |
3012 | struct cm_work *work; | |
3013 | unsigned long flags; | |
3014 | int ret = 0; | |
3015 | ||
3016 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3017 | if (!work) | |
3018 | return -ENOMEM; | |
3019 | ||
3020 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3021 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3022 | switch (cm_id->state) | |
3023 | { | |
3024 | case IB_CM_REP_SENT: | |
3025 | case IB_CM_MRA_REP_RCVD: | |
3026 | cm_id->state = IB_CM_ESTABLISHED; | |
3027 | break; | |
3028 | case IB_CM_ESTABLISHED: | |
3029 | ret = -EISCONN; | |
3030 | break; | |
3031 | default: | |
3032 | ret = -EINVAL; | |
3033 | break; | |
3034 | } | |
3035 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3036 | ||
3037 | if (ret) { | |
3038 | kfree(work); | |
3039 | goto out; | |
3040 | } | |
3041 | ||
3042 | /* | |
3043 | * The CM worker thread may try to destroy the cm_id before it | |
3044 | * can execute this work item. To prevent potential deadlock, | |
3045 | * we need to find the cm_id once we're in the context of the | |
3046 | * worker thread, rather than holding a reference on it. | |
3047 | */ | |
3048 | INIT_WORK(&work->work, cm_work_handler, work); | |
3049 | work->local_id = cm_id->local_id; | |
3050 | work->remote_id = cm_id->remote_id; | |
3051 | work->mad_recv_wc = NULL; | |
3052 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
3053 | queue_work(cm.wq, &work->work); | |
3054 | out: | |
3055 | return ret; | |
3056 | } | |
3057 | EXPORT_SYMBOL(ib_cm_establish); | |
3058 | ||
3059 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3060 | struct ib_mad_recv_wc *mad_recv_wc) | |
3061 | { | |
3062 | struct cm_work *work; | |
3063 | enum ib_cm_event_type event; | |
3064 | int paths = 0; | |
3065 | ||
3066 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3067 | case CM_REQ_ATTR_ID: | |
3068 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3069 | alt_local_lid != 0); | |
3070 | event = IB_CM_REQ_RECEIVED; | |
3071 | break; | |
3072 | case CM_MRA_ATTR_ID: | |
3073 | event = IB_CM_MRA_RECEIVED; | |
3074 | break; | |
3075 | case CM_REJ_ATTR_ID: | |
3076 | event = IB_CM_REJ_RECEIVED; | |
3077 | break; | |
3078 | case CM_REP_ATTR_ID: | |
3079 | event = IB_CM_REP_RECEIVED; | |
3080 | break; | |
3081 | case CM_RTU_ATTR_ID: | |
3082 | event = IB_CM_RTU_RECEIVED; | |
3083 | break; | |
3084 | case CM_DREQ_ATTR_ID: | |
3085 | event = IB_CM_DREQ_RECEIVED; | |
3086 | break; | |
3087 | case CM_DREP_ATTR_ID: | |
3088 | event = IB_CM_DREP_RECEIVED; | |
3089 | break; | |
3090 | case CM_SIDR_REQ_ATTR_ID: | |
3091 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3092 | break; | |
3093 | case CM_SIDR_REP_ATTR_ID: | |
3094 | event = IB_CM_SIDR_REP_RECEIVED; | |
3095 | break; | |
3096 | case CM_LAP_ATTR_ID: | |
3097 | paths = 1; | |
3098 | event = IB_CM_LAP_RECEIVED; | |
3099 | break; | |
3100 | case CM_APR_ATTR_ID: | |
3101 | event = IB_CM_APR_RECEIVED; | |
3102 | break; | |
3103 | default: | |
3104 | ib_free_recv_mad(mad_recv_wc); | |
3105 | return; | |
3106 | } | |
3107 | ||
3108 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, | |
3109 | GFP_KERNEL); | |
3110 | if (!work) { | |
3111 | ib_free_recv_mad(mad_recv_wc); | |
3112 | return; | |
3113 | } | |
3114 | ||
3115 | INIT_WORK(&work->work, cm_work_handler, work); | |
3116 | work->cm_event.event = event; | |
3117 | work->mad_recv_wc = mad_recv_wc; | |
3118 | work->port = (struct cm_port *)mad_agent->context; | |
3119 | queue_work(cm.wq, &work->work); | |
3120 | } | |
3121 | ||
3122 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3123 | struct ib_qp_attr *qp_attr, | |
3124 | int *qp_attr_mask) | |
3125 | { | |
3126 | unsigned long flags; | |
3127 | int ret; | |
3128 | ||
3129 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3130 | switch (cm_id_priv->id.state) { | |
3131 | case IB_CM_REQ_SENT: | |
3132 | case IB_CM_MRA_REQ_RCVD: | |
3133 | case IB_CM_REQ_RCVD: | |
3134 | case IB_CM_MRA_REQ_SENT: | |
3135 | case IB_CM_REP_RCVD: | |
3136 | case IB_CM_MRA_REP_SENT: | |
3137 | case IB_CM_REP_SENT: | |
3138 | case IB_CM_MRA_REP_RCVD: | |
3139 | case IB_CM_ESTABLISHED: | |
3140 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3141 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
ae7971a7 SH |
3142 | qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE | |
3143 | IB_ACCESS_REMOTE_WRITE; | |
a977049d | 3144 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3145 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3146 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3147 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3148 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3149 | ret = 0; | |
3150 | break; | |
3151 | default: | |
3152 | ret = -EINVAL; | |
3153 | break; | |
3154 | } | |
3155 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3156 | return ret; | |
3157 | } | |
3158 | ||
3159 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3160 | struct ib_qp_attr *qp_attr, | |
3161 | int *qp_attr_mask) | |
3162 | { | |
3163 | unsigned long flags; | |
3164 | int ret; | |
3165 | ||
3166 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3167 | switch (cm_id_priv->id.state) { | |
3168 | case IB_CM_REQ_RCVD: | |
3169 | case IB_CM_MRA_REQ_SENT: | |
3170 | case IB_CM_REP_RCVD: | |
3171 | case IB_CM_MRA_REP_SENT: | |
3172 | case IB_CM_REP_SENT: | |
3173 | case IB_CM_MRA_REP_RCVD: | |
3174 | case IB_CM_ESTABLISHED: | |
3175 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3176 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3177 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3178 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3179 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3180 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
ae7971a7 SH |
3181 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3182 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | | |
3183 | IB_QP_MIN_RNR_TIMER; | |
3184 | qp_attr->max_dest_rd_atomic = | |
3185 | cm_id_priv->responder_resources; | |
3186 | qp_attr->min_rnr_timer = 0; | |
3187 | } | |
a977049d HR |
3188 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3189 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3190 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
a977049d HR |
3191 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3192 | } | |
3193 | ret = 0; | |
3194 | break; | |
3195 | default: | |
3196 | ret = -EINVAL; | |
3197 | break; | |
3198 | } | |
3199 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3200 | return ret; | |
3201 | } | |
3202 | ||
3203 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3204 | struct ib_qp_attr *qp_attr, | |
3205 | int *qp_attr_mask) | |
3206 | { | |
3207 | unsigned long flags; | |
3208 | int ret; | |
3209 | ||
3210 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3211 | switch (cm_id_priv->id.state) { | |
3212 | case IB_CM_REP_RCVD: | |
3213 | case IB_CM_MRA_REP_SENT: | |
3214 | case IB_CM_REP_SENT: | |
3215 | case IB_CM_MRA_REP_RCVD: | |
3216 | case IB_CM_ESTABLISHED: | |
ae7971a7 | 3217 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; |
a977049d | 3218 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); |
ae7971a7 SH |
3219 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3220 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3221 | IB_QP_RNR_RETRY | | |
3222 | IB_QP_MAX_QP_RD_ATOMIC; | |
3223 | qp_attr->timeout = cm_id_priv->local_ack_timeout; | |
3224 | qp_attr->retry_cnt = cm_id_priv->retry_count; | |
3225 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3226 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; | |
3227 | } | |
a977049d HR |
3228 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3229 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3230 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3231 | } | |
3232 | ret = 0; | |
3233 | break; | |
3234 | default: | |
3235 | ret = -EINVAL; | |
3236 | break; | |
3237 | } | |
3238 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3239 | return ret; | |
3240 | } | |
3241 | ||
3242 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3243 | struct ib_qp_attr *qp_attr, | |
3244 | int *qp_attr_mask) | |
3245 | { | |
3246 | struct cm_id_private *cm_id_priv; | |
3247 | int ret; | |
3248 | ||
3249 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3250 | switch (qp_attr->qp_state) { | |
3251 | case IB_QPS_INIT: | |
3252 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3253 | break; | |
3254 | case IB_QPS_RTR: | |
3255 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3256 | break; | |
3257 | case IB_QPS_RTS: | |
3258 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3259 | break; | |
3260 | default: | |
3261 | ret = -EINVAL; | |
3262 | break; | |
3263 | } | |
3264 | return ret; | |
3265 | } | |
3266 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3267 | ||
a977049d HR |
3268 | static void cm_add_one(struct ib_device *device) |
3269 | { | |
3270 | struct cm_device *cm_dev; | |
3271 | struct cm_port *port; | |
3272 | struct ib_mad_reg_req reg_req = { | |
3273 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3274 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3275 | }; | |
3276 | struct ib_port_modify port_modify = { | |
3277 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3278 | }; | |
3279 | unsigned long flags; | |
3280 | int ret; | |
3281 | u8 i; | |
3282 | ||
3283 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * | |
3284 | device->phys_port_cnt, GFP_KERNEL); | |
3285 | if (!cm_dev) | |
3286 | return; | |
3287 | ||
3288 | cm_dev->device = device; | |
cf311cd4 | 3289 | cm_dev->ca_guid = device->node_guid; |
a977049d HR |
3290 | |
3291 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); | |
3292 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3293 | port = &cm_dev->port[i-1]; | |
3294 | port->cm_dev = cm_dev; | |
3295 | port->port_num = i; | |
3296 | port->mad_agent = ib_register_mad_agent(device, i, | |
3297 | IB_QPT_GSI, | |
3298 | ®_req, | |
3299 | 0, | |
3300 | cm_send_handler, | |
3301 | cm_recv_handler, | |
3302 | port); | |
3303 | if (IS_ERR(port->mad_agent)) | |
cf311cd4 | 3304 | goto error1; |
a977049d HR |
3305 | |
3306 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3307 | if (ret) | |
cf311cd4 | 3308 | goto error2; |
a977049d HR |
3309 | } |
3310 | ib_set_client_data(device, &cm_client, cm_dev); | |
3311 | ||
3312 | write_lock_irqsave(&cm.device_lock, flags); | |
3313 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3314 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3315 | return; | |
3316 | ||
a977049d | 3317 | error2: |
cf311cd4 SH |
3318 | ib_unregister_mad_agent(port->mad_agent); |
3319 | error1: | |
a977049d HR |
3320 | port_modify.set_port_cap_mask = 0; |
3321 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3322 | while (--i) { | |
3323 | port = &cm_dev->port[i-1]; | |
3324 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3325 | ib_unregister_mad_agent(port->mad_agent); | |
3326 | } | |
a977049d HR |
3327 | kfree(cm_dev); |
3328 | } | |
3329 | ||
3330 | static void cm_remove_one(struct ib_device *device) | |
3331 | { | |
3332 | struct cm_device *cm_dev; | |
3333 | struct cm_port *port; | |
3334 | struct ib_port_modify port_modify = { | |
3335 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3336 | }; | |
3337 | unsigned long flags; | |
3338 | int i; | |
3339 | ||
3340 | cm_dev = ib_get_client_data(device, &cm_client); | |
3341 | if (!cm_dev) | |
3342 | return; | |
3343 | ||
3344 | write_lock_irqsave(&cm.device_lock, flags); | |
3345 | list_del(&cm_dev->list); | |
3346 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3347 | ||
3348 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3349 | port = &cm_dev->port[i-1]; | |
3350 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3351 | ib_unregister_mad_agent(port->mad_agent); | |
3352 | } | |
3353 | kfree(cm_dev); | |
3354 | } | |
3355 | ||
3356 | static int __init ib_cm_init(void) | |
3357 | { | |
3358 | int ret; | |
3359 | ||
3360 | memset(&cm, 0, sizeof cm); | |
3361 | INIT_LIST_HEAD(&cm.device_list); | |
3362 | rwlock_init(&cm.device_lock); | |
3363 | spin_lock_init(&cm.lock); | |
3364 | cm.listen_service_table = RB_ROOT; | |
3365 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3366 | cm.remote_id_table = RB_ROOT; | |
3367 | cm.remote_qp_table = RB_ROOT; | |
3368 | cm.remote_sidr_table = RB_ROOT; | |
3369 | idr_init(&cm.local_id_table); | |
f06d2653 | 3370 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
a977049d HR |
3371 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
3372 | ||
3373 | cm.wq = create_workqueue("ib_cm"); | |
3374 | if (!cm.wq) | |
3375 | return -ENOMEM; | |
3376 | ||
3377 | ret = ib_register_client(&cm_client); | |
3378 | if (ret) | |
3379 | goto error; | |
3380 | ||
3381 | return 0; | |
3382 | error: | |
3383 | destroy_workqueue(cm.wq); | |
3384 | return ret; | |
3385 | } | |
3386 | ||
3387 | static void __exit ib_cm_cleanup(void) | |
3388 | { | |
a977049d HR |
3389 | destroy_workqueue(cm.wq); |
3390 | ib_unregister_client(&cm_client); | |
5d7edb3c | 3391 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3392 | } |
3393 | ||
3394 | module_init(ib_cm_init); | |
3395 | module_exit(ib_cm_cleanup); | |
3396 |