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a977049d HR |
1 | /* |
2 | * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. | |
3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. | |
4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. | |
5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
6 | * | |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
34 | * | |
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> | |
44 | #include <linux/rbtree.h> | |
45 | #include <linux/spinlock.h> | |
46 | #include <linux/workqueue.h> | |
47 | ||
a4d61e84 RD |
48 | #include <rdma/ib_cache.h> |
49 | #include <rdma/ib_cm.h> | |
a977049d HR |
50 | #include "cm_msgs.h" |
51 | ||
52 | MODULE_AUTHOR("Sean Hefty"); | |
53 | MODULE_DESCRIPTION("InfiniBand CM"); | |
54 | MODULE_LICENSE("Dual BSD/GPL"); | |
55 | ||
56 | static void cm_add_one(struct ib_device *device); | |
57 | static void cm_remove_one(struct ib_device *device); | |
58 | ||
59 | static struct ib_client cm_client = { | |
60 | .name = "cm", | |
61 | .add = cm_add_one, | |
62 | .remove = cm_remove_one | |
63 | }; | |
64 | ||
65 | static struct ib_cm { | |
66 | spinlock_t lock; | |
67 | struct list_head device_list; | |
68 | rwlock_t device_lock; | |
69 | struct rb_root listen_service_table; | |
70 | u64 listen_service_id; | |
71 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
72 | struct rb_root remote_qp_table; | |
73 | struct rb_root remote_id_table; | |
74 | struct rb_root remote_sidr_table; | |
75 | struct idr local_id_table; | |
76 | struct workqueue_struct *wq; | |
77 | } cm; | |
78 | ||
79 | struct cm_port { | |
80 | struct cm_device *cm_dev; | |
81 | struct ib_mad_agent *mad_agent; | |
82 | u8 port_num; | |
83 | }; | |
84 | ||
85 | struct cm_device { | |
86 | struct list_head list; | |
87 | struct ib_device *device; | |
97f52eb4 | 88 | __be64 ca_guid; |
a977049d HR |
89 | struct cm_port port[0]; |
90 | }; | |
91 | ||
92 | struct cm_av { | |
93 | struct cm_port *port; | |
94 | union ib_gid dgid; | |
95 | struct ib_ah_attr ah_attr; | |
96 | u16 pkey_index; | |
97 | u8 packet_life_time; | |
98 | }; | |
99 | ||
100 | struct cm_work { | |
101 | struct work_struct work; | |
102 | struct list_head list; | |
103 | struct cm_port *port; | |
104 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
105 | __be32 local_id; /* Established / timewait */ |
106 | __be32 remote_id; | |
a977049d HR |
107 | struct ib_cm_event cm_event; |
108 | struct ib_sa_path_rec path[0]; | |
109 | }; | |
110 | ||
111 | struct cm_timewait_info { | |
112 | struct cm_work work; /* Must be first. */ | |
113 | struct rb_node remote_qp_node; | |
114 | struct rb_node remote_id_node; | |
97f52eb4 SH |
115 | __be64 remote_ca_guid; |
116 | __be32 remote_qpn; | |
a977049d HR |
117 | u8 inserted_remote_qp; |
118 | u8 inserted_remote_id; | |
119 | }; | |
120 | ||
121 | struct cm_id_private { | |
122 | struct ib_cm_id id; | |
123 | ||
124 | struct rb_node service_node; | |
125 | struct rb_node sidr_id_node; | |
87fd1a11 | 126 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 127 | struct completion comp; |
a977049d HR |
128 | atomic_t refcount; |
129 | ||
130 | struct ib_mad_send_buf *msg; | |
131 | struct cm_timewait_info *timewait_info; | |
132 | /* todo: use alternate port on send failure */ | |
133 | struct cm_av av; | |
134 | struct cm_av alt_av; | |
6e61d04f | 135 | struct ib_cm_compare_data *compare_data; |
a977049d HR |
136 | |
137 | void *private_data; | |
97f52eb4 SH |
138 | __be64 tid; |
139 | __be32 local_qpn; | |
140 | __be32 remote_qpn; | |
ae7971a7 | 141 | enum ib_qp_type qp_type; |
97f52eb4 SH |
142 | __be32 sq_psn; |
143 | __be32 rq_psn; | |
a977049d HR |
144 | int timeout_ms; |
145 | enum ib_mtu path_mtu; | |
146 | u8 private_data_len; | |
147 | u8 max_cm_retries; | |
148 | u8 peer_to_peer; | |
149 | u8 responder_resources; | |
150 | u8 initiator_depth; | |
151 | u8 local_ack_timeout; | |
152 | u8 retry_count; | |
153 | u8 rnr_retry_count; | |
154 | u8 service_timeout; | |
155 | ||
156 | struct list_head work_list; | |
157 | atomic_t work_count; | |
158 | }; | |
159 | ||
160 | static void cm_work_handler(void *data); | |
161 | ||
162 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
163 | { | |
164 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 165 | complete(&cm_id_priv->comp); |
a977049d HR |
166 | } |
167 | ||
168 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
169 | struct ib_mad_send_buf **msg) | |
170 | { | |
171 | struct ib_mad_agent *mad_agent; | |
172 | struct ib_mad_send_buf *m; | |
173 | struct ib_ah *ah; | |
174 | ||
175 | mad_agent = cm_id_priv->av.port->mad_agent; | |
176 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
177 | if (IS_ERR(ah)) | |
178 | return PTR_ERR(ah); | |
179 | ||
354ba39c JK |
180 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
181 | cm_id_priv->av.pkey_index, | |
34816ad9 | 182 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
183 | GFP_ATOMIC); |
184 | if (IS_ERR(m)) { | |
185 | ib_destroy_ah(ah); | |
186 | return PTR_ERR(m); | |
187 | } | |
188 | ||
189 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
190 | m->ah = ah; |
191 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
192 | |
193 | atomic_inc(&cm_id_priv->refcount); | |
194 | m->context[0] = cm_id_priv; | |
195 | *msg = m; | |
196 | return 0; | |
197 | } | |
198 | ||
199 | static int cm_alloc_response_msg(struct cm_port *port, | |
200 | struct ib_mad_recv_wc *mad_recv_wc, | |
201 | struct ib_mad_send_buf **msg) | |
202 | { | |
203 | struct ib_mad_send_buf *m; | |
204 | struct ib_ah *ah; | |
205 | ||
206 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
207 | mad_recv_wc->recv_buf.grh, port->port_num); | |
208 | if (IS_ERR(ah)) | |
209 | return PTR_ERR(ah); | |
210 | ||
211 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 212 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
213 | GFP_ATOMIC); |
214 | if (IS_ERR(m)) { | |
215 | ib_destroy_ah(ah); | |
216 | return PTR_ERR(m); | |
217 | } | |
34816ad9 | 218 | m->ah = ah; |
a977049d HR |
219 | *msg = m; |
220 | return 0; | |
221 | } | |
222 | ||
223 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
224 | { | |
34816ad9 | 225 | ib_destroy_ah(msg->ah); |
a977049d HR |
226 | if (msg->context[0]) |
227 | cm_deref_id(msg->context[0]); | |
228 | ib_free_send_mad(msg); | |
229 | } | |
230 | ||
231 | static void * cm_copy_private_data(const void *private_data, | |
232 | u8 private_data_len) | |
233 | { | |
234 | void *data; | |
235 | ||
236 | if (!private_data || !private_data_len) | |
237 | return NULL; | |
238 | ||
239 | data = kmalloc(private_data_len, GFP_KERNEL); | |
240 | if (!data) | |
241 | return ERR_PTR(-ENOMEM); | |
242 | ||
243 | memcpy(data, private_data, private_data_len); | |
244 | return data; | |
245 | } | |
246 | ||
247 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
248 | void *private_data, u8 private_data_len) | |
249 | { | |
250 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
251 | kfree(cm_id_priv->private_data); | |
252 | ||
253 | cm_id_priv->private_data = private_data; | |
254 | cm_id_priv->private_data_len = private_data_len; | |
255 | } | |
256 | ||
257 | static void cm_set_ah_attr(struct ib_ah_attr *ah_attr, u8 port_num, | |
258 | u16 dlid, u8 sl, u16 src_path_bits) | |
259 | { | |
260 | memset(ah_attr, 0, sizeof ah_attr); | |
97f52eb4 | 261 | ah_attr->dlid = dlid; |
a977049d HR |
262 | ah_attr->sl = sl; |
263 | ah_attr->src_path_bits = src_path_bits; | |
264 | ah_attr->port_num = port_num; | |
265 | } | |
266 | ||
267 | static void cm_init_av_for_response(struct cm_port *port, | |
268 | struct ib_wc *wc, struct cm_av *av) | |
269 | { | |
270 | av->port = port; | |
271 | av->pkey_index = wc->pkey_index; | |
97f52eb4 | 272 | cm_set_ah_attr(&av->ah_attr, port->port_num, wc->slid, |
a977049d HR |
273 | wc->sl, wc->dlid_path_bits); |
274 | } | |
275 | ||
276 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
277 | { | |
278 | struct cm_device *cm_dev; | |
279 | struct cm_port *port = NULL; | |
280 | unsigned long flags; | |
281 | int ret; | |
282 | u8 p; | |
283 | ||
284 | read_lock_irqsave(&cm.device_lock, flags); | |
285 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
286 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, | |
287 | &p, NULL)) { | |
288 | port = &cm_dev->port[p-1]; | |
289 | break; | |
290 | } | |
291 | } | |
292 | read_unlock_irqrestore(&cm.device_lock, flags); | |
293 | ||
294 | if (!port) | |
295 | return -EINVAL; | |
296 | ||
297 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, | |
298 | be16_to_cpu(path->pkey), &av->pkey_index); | |
299 | if (ret) | |
300 | return ret; | |
301 | ||
302 | av->port = port; | |
97f52eb4 SH |
303 | cm_set_ah_attr(&av->ah_attr, av->port->port_num, |
304 | be16_to_cpu(path->dlid), path->sl, | |
305 | be16_to_cpu(path->slid) & 0x7F); | |
a977049d HR |
306 | av->packet_life_time = path->packet_life_time; |
307 | return 0; | |
308 | } | |
309 | ||
310 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
311 | { | |
312 | unsigned long flags; | |
313 | int ret; | |
de1bb1a6 | 314 | static int next_id; |
a977049d HR |
315 | |
316 | do { | |
317 | spin_lock_irqsave(&cm.lock, flags); | |
de1bb1a6 | 318 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, next_id++, |
97f52eb4 | 319 | (__force int *) &cm_id_priv->id.local_id); |
a977049d HR |
320 | spin_unlock_irqrestore(&cm.lock, flags); |
321 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
322 | return ret; | |
323 | } | |
324 | ||
97f52eb4 | 325 | static void cm_free_id(__be32 local_id) |
a977049d HR |
326 | { |
327 | unsigned long flags; | |
328 | ||
329 | spin_lock_irqsave(&cm.lock, flags); | |
97f52eb4 | 330 | idr_remove(&cm.local_id_table, (__force int) local_id); |
a977049d HR |
331 | spin_unlock_irqrestore(&cm.lock, flags); |
332 | } | |
333 | ||
97f52eb4 | 334 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
335 | { |
336 | struct cm_id_private *cm_id_priv; | |
337 | ||
97f52eb4 | 338 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) local_id); |
a977049d HR |
339 | if (cm_id_priv) { |
340 | if (cm_id_priv->id.remote_id == remote_id) | |
341 | atomic_inc(&cm_id_priv->refcount); | |
342 | else | |
343 | cm_id_priv = NULL; | |
344 | } | |
345 | ||
346 | return cm_id_priv; | |
347 | } | |
348 | ||
97f52eb4 | 349 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
350 | { |
351 | struct cm_id_private *cm_id_priv; | |
352 | unsigned long flags; | |
353 | ||
354 | spin_lock_irqsave(&cm.lock, flags); | |
355 | cm_id_priv = cm_get_id(local_id, remote_id); | |
356 | spin_unlock_irqrestore(&cm.lock, flags); | |
357 | ||
358 | return cm_id_priv; | |
359 | } | |
360 | ||
6e61d04f SH |
361 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
362 | { | |
363 | int i; | |
364 | ||
365 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) | |
366 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & | |
367 | ((unsigned long *) mask)[i]; | |
368 | } | |
369 | ||
370 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
371 | struct ib_cm_compare_data *dst_data) | |
372 | { | |
373 | u8 src[IB_CM_COMPARE_SIZE]; | |
374 | u8 dst[IB_CM_COMPARE_SIZE]; | |
375 | ||
376 | if (!src_data || !dst_data) | |
377 | return 0; | |
378 | ||
379 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
380 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
381 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); | |
382 | } | |
383 | ||
384 | static int cm_compare_private_data(u8 *private_data, | |
385 | struct ib_cm_compare_data *dst_data) | |
386 | { | |
387 | u8 src[IB_CM_COMPARE_SIZE]; | |
388 | ||
389 | if (!dst_data) | |
390 | return 0; | |
391 | ||
392 | cm_mask_copy(src, private_data, dst_data->mask); | |
393 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); | |
394 | } | |
395 | ||
a977049d HR |
396 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
397 | { | |
398 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
399 | struct rb_node *parent = NULL; | |
400 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
401 | __be64 service_id = cm_id_priv->id.service_id; |
402 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 403 | int data_cmp; |
a977049d HR |
404 | |
405 | while (*link) { | |
406 | parent = *link; | |
407 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
408 | service_node); | |
6e61d04f SH |
409 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
410 | cur_cm_id_priv->compare_data); | |
a977049d | 411 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 412 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
413 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
414 | !data_cmp) | |
07d357d0 SH |
415 | return cur_cm_id_priv; |
416 | ||
417 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
418 | link = &(*link)->rb_left; | |
419 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
420 | link = &(*link)->rb_right; | |
421 | else if (service_id < cur_cm_id_priv->id.service_id) | |
a977049d | 422 | link = &(*link)->rb_left; |
6e61d04f SH |
423 | else if (service_id > cur_cm_id_priv->id.service_id) |
424 | link = &(*link)->rb_right; | |
425 | else if (data_cmp < 0) | |
426 | link = &(*link)->rb_left; | |
a977049d HR |
427 | else |
428 | link = &(*link)->rb_right; | |
429 | } | |
430 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
431 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
432 | return NULL; | |
433 | } | |
434 | ||
07d357d0 | 435 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f SH |
436 | __be64 service_id, |
437 | u8 *private_data) | |
a977049d HR |
438 | { |
439 | struct rb_node *node = cm.listen_service_table.rb_node; | |
440 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 441 | int data_cmp; |
a977049d HR |
442 | |
443 | while (node) { | |
444 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
445 | data_cmp = cm_compare_private_data(private_data, |
446 | cm_id_priv->compare_data); | |
a977049d | 447 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 448 | cm_id_priv->id.service_id && |
6e61d04f | 449 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 450 | return cm_id_priv; |
07d357d0 SH |
451 | |
452 | if (device < cm_id_priv->id.device) | |
453 | node = node->rb_left; | |
454 | else if (device > cm_id_priv->id.device) | |
455 | node = node->rb_right; | |
456 | else if (service_id < cm_id_priv->id.service_id) | |
a977049d | 457 | node = node->rb_left; |
6e61d04f SH |
458 | else if (service_id > cm_id_priv->id.service_id) |
459 | node = node->rb_right; | |
460 | else if (data_cmp < 0) | |
461 | node = node->rb_left; | |
a977049d HR |
462 | else |
463 | node = node->rb_right; | |
464 | } | |
465 | return NULL; | |
466 | } | |
467 | ||
468 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
469 | *timewait_info) | |
470 | { | |
471 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
472 | struct rb_node *parent = NULL; | |
473 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
474 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
475 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
476 | |
477 | while (*link) { | |
478 | parent = *link; | |
479 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
480 | remote_id_node); | |
481 | if (remote_id < cur_timewait_info->work.remote_id) | |
482 | link = &(*link)->rb_left; | |
483 | else if (remote_id > cur_timewait_info->work.remote_id) | |
484 | link = &(*link)->rb_right; | |
485 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
486 | link = &(*link)->rb_left; | |
487 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
488 | link = &(*link)->rb_right; | |
489 | else | |
490 | return cur_timewait_info; | |
491 | } | |
492 | timewait_info->inserted_remote_id = 1; | |
493 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
494 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
495 | return NULL; | |
496 | } | |
497 | ||
97f52eb4 SH |
498 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
499 | __be32 remote_id) | |
a977049d HR |
500 | { |
501 | struct rb_node *node = cm.remote_id_table.rb_node; | |
502 | struct cm_timewait_info *timewait_info; | |
503 | ||
504 | while (node) { | |
505 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
506 | remote_id_node); | |
507 | if (remote_id < timewait_info->work.remote_id) | |
508 | node = node->rb_left; | |
509 | else if (remote_id > timewait_info->work.remote_id) | |
510 | node = node->rb_right; | |
511 | else if (remote_ca_guid < timewait_info->remote_ca_guid) | |
512 | node = node->rb_left; | |
513 | else if (remote_ca_guid > timewait_info->remote_ca_guid) | |
514 | node = node->rb_right; | |
515 | else | |
516 | return timewait_info; | |
517 | } | |
518 | return NULL; | |
519 | } | |
520 | ||
521 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
522 | *timewait_info) | |
523 | { | |
524 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
525 | struct rb_node *parent = NULL; | |
526 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
527 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
528 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
529 | |
530 | while (*link) { | |
531 | parent = *link; | |
532 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
533 | remote_qp_node); | |
534 | if (remote_qpn < cur_timewait_info->remote_qpn) | |
535 | link = &(*link)->rb_left; | |
536 | else if (remote_qpn > cur_timewait_info->remote_qpn) | |
537 | link = &(*link)->rb_right; | |
538 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
539 | link = &(*link)->rb_left; | |
540 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
541 | link = &(*link)->rb_right; | |
542 | else | |
543 | return cur_timewait_info; | |
544 | } | |
545 | timewait_info->inserted_remote_qp = 1; | |
546 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
547 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
548 | return NULL; | |
549 | } | |
550 | ||
551 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
552 | *cm_id_priv) | |
553 | { | |
554 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
555 | struct rb_node *parent = NULL; | |
556 | struct cm_id_private *cur_cm_id_priv; | |
557 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 558 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
559 | |
560 | while (*link) { | |
561 | parent = *link; | |
562 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
563 | sidr_id_node); | |
564 | if (remote_id < cur_cm_id_priv->id.remote_id) | |
565 | link = &(*link)->rb_left; | |
566 | else if (remote_id > cur_cm_id_priv->id.remote_id) | |
567 | link = &(*link)->rb_right; | |
568 | else { | |
569 | int cmp; | |
570 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
571 | sizeof *port_gid); | |
572 | if (cmp < 0) | |
573 | link = &(*link)->rb_left; | |
574 | else if (cmp > 0) | |
575 | link = &(*link)->rb_right; | |
576 | else | |
577 | return cur_cm_id_priv; | |
578 | } | |
579 | } | |
580 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
581 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
582 | return NULL; | |
583 | } | |
584 | ||
585 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
586 | enum ib_cm_sidr_status status) | |
587 | { | |
588 | struct ib_cm_sidr_rep_param param; | |
589 | ||
590 | memset(¶m, 0, sizeof param); | |
591 | param.status = status; | |
592 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
593 | } | |
594 | ||
07d357d0 SH |
595 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
596 | ib_cm_handler cm_handler, | |
a977049d HR |
597 | void *context) |
598 | { | |
599 | struct cm_id_private *cm_id_priv; | |
600 | int ret; | |
601 | ||
de6eb66b | 602 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
603 | if (!cm_id_priv) |
604 | return ERR_PTR(-ENOMEM); | |
605 | ||
a977049d | 606 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 607 | cm_id_priv->id.device = device; |
a977049d HR |
608 | cm_id_priv->id.cm_handler = cm_handler; |
609 | cm_id_priv->id.context = context; | |
354ba39c | 610 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
611 | ret = cm_alloc_id(cm_id_priv); |
612 | if (ret) | |
613 | goto error; | |
614 | ||
615 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 616 | init_completion(&cm_id_priv->comp); |
a977049d HR |
617 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
618 | atomic_set(&cm_id_priv->work_count, -1); | |
619 | atomic_set(&cm_id_priv->refcount, 1); | |
620 | return &cm_id_priv->id; | |
621 | ||
622 | error: | |
623 | kfree(cm_id_priv); | |
624 | return ERR_PTR(-ENOMEM); | |
625 | } | |
626 | EXPORT_SYMBOL(ib_create_cm_id); | |
627 | ||
628 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
629 | { | |
630 | struct cm_work *work; | |
631 | ||
632 | if (list_empty(&cm_id_priv->work_list)) | |
633 | return NULL; | |
634 | ||
635 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
636 | list_del(&work->list); | |
637 | return work; | |
638 | } | |
639 | ||
640 | static void cm_free_work(struct cm_work *work) | |
641 | { | |
642 | if (work->mad_recv_wc) | |
643 | ib_free_recv_mad(work->mad_recv_wc); | |
644 | kfree(work); | |
645 | } | |
646 | ||
647 | static inline int cm_convert_to_ms(int iba_time) | |
648 | { | |
649 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
650 | return 1 << max(iba_time - 8, 0); | |
651 | } | |
652 | ||
653 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) | |
654 | { | |
655 | unsigned long flags; | |
656 | ||
657 | if (!timewait_info->inserted_remote_id && | |
658 | !timewait_info->inserted_remote_qp) | |
659 | return; | |
660 | ||
661 | spin_lock_irqsave(&cm.lock, flags); | |
662 | if (timewait_info->inserted_remote_id) { | |
663 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
664 | timewait_info->inserted_remote_id = 0; | |
665 | } | |
666 | ||
667 | if (timewait_info->inserted_remote_qp) { | |
668 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
669 | timewait_info->inserted_remote_qp = 0; | |
670 | } | |
671 | spin_unlock_irqrestore(&cm.lock, flags); | |
672 | } | |
673 | ||
97f52eb4 | 674 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
675 | { |
676 | struct cm_timewait_info *timewait_info; | |
677 | ||
de6eb66b | 678 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
679 | if (!timewait_info) |
680 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
681 | |
682 | timewait_info->work.local_id = local_id; | |
683 | INIT_WORK(&timewait_info->work.work, cm_work_handler, | |
684 | &timewait_info->work); | |
685 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; | |
686 | return timewait_info; | |
687 | } | |
688 | ||
689 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
690 | { | |
691 | int wait_time; | |
692 | ||
693 | /* | |
694 | * The cm_id could be destroyed by the user before we exit timewait. | |
695 | * To protect against this, we search for the cm_id after exiting | |
696 | * timewait before notifying the user that we've exited timewait. | |
697 | */ | |
698 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
699 | wait_time = cm_convert_to_ms(cm_id_priv->local_ack_timeout); | |
700 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
701 | msecs_to_jiffies(wait_time)); | |
702 | cm_id_priv->timewait_info = NULL; | |
703 | } | |
704 | ||
705 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
706 | { | |
707 | cm_id_priv->id.state = IB_CM_IDLE; | |
708 | if (cm_id_priv->timewait_info) { | |
709 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
710 | kfree(cm_id_priv->timewait_info); | |
711 | cm_id_priv->timewait_info = NULL; | |
712 | } | |
713 | } | |
714 | ||
715 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
716 | { | |
717 | struct cm_id_private *cm_id_priv; | |
718 | struct cm_work *work; | |
719 | unsigned long flags; | |
720 | ||
721 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
722 | retest: | |
723 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
724 | switch (cm_id->state) { | |
725 | case IB_CM_LISTEN: | |
726 | cm_id->state = IB_CM_IDLE; | |
727 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
728 | spin_lock_irqsave(&cm.lock, flags); | |
729 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); | |
730 | spin_unlock_irqrestore(&cm.lock, flags); | |
731 | break; | |
732 | case IB_CM_SIDR_REQ_SENT: | |
733 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 734 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
735 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
736 | break; | |
737 | case IB_CM_SIDR_REQ_RCVD: | |
738 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
739 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); | |
740 | break; | |
741 | case IB_CM_REQ_SENT: | |
227eca83 SH |
742 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
743 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
744 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, | |
745 | &cm_id_priv->av.port->cm_dev->ca_guid, | |
746 | sizeof cm_id_priv->av.port->cm_dev->ca_guid, | |
747 | NULL, 0); | |
748 | break; | |
a977049d HR |
749 | case IB_CM_MRA_REQ_RCVD: |
750 | case IB_CM_REP_SENT: | |
751 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 752 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
753 | /* Fall through */ |
754 | case IB_CM_REQ_RCVD: | |
755 | case IB_CM_MRA_REQ_SENT: | |
756 | case IB_CM_REP_RCVD: | |
757 | case IB_CM_MRA_REP_SENT: | |
758 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
227eca83 SH |
759 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
760 | NULL, 0, NULL, 0); | |
a977049d HR |
761 | break; |
762 | case IB_CM_ESTABLISHED: | |
763 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
764 | ib_send_cm_dreq(cm_id, NULL, 0); | |
765 | goto retest; | |
766 | case IB_CM_DREQ_SENT: | |
34816ad9 | 767 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
768 | cm_enter_timewait(cm_id_priv); |
769 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
770 | break; | |
771 | case IB_CM_DREQ_RCVD: | |
772 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
773 | ib_send_cm_drep(cm_id, NULL, 0); | |
774 | break; | |
775 | default: | |
776 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
777 | break; | |
778 | } | |
779 | ||
780 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
781 | cm_deref_id(cm_id_priv); |
782 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
783 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
784 | cm_free_work(work); | |
6e61d04f SH |
785 | kfree(cm_id_priv->compare_data); |
786 | kfree(cm_id_priv->private_data); | |
a977049d HR |
787 | kfree(cm_id_priv); |
788 | } | |
789 | EXPORT_SYMBOL(ib_destroy_cm_id); | |
790 | ||
6e61d04f SH |
791 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
792 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
793 | { |
794 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
795 | unsigned long flags; | |
796 | int ret = 0; | |
797 | ||
97f52eb4 SH |
798 | service_mask = service_mask ? service_mask : |
799 | __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
800 | service_id &= service_mask; |
801 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
802 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
803 | return -EINVAL; | |
804 | ||
805 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
806 | if (cm_id->state != IB_CM_IDLE) |
807 | return -EINVAL; | |
808 | ||
809 | if (compare_data) { | |
810 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
811 | GFP_KERNEL); | |
812 | if (!cm_id_priv->compare_data) | |
813 | return -ENOMEM; | |
814 | cm_mask_copy(cm_id_priv->compare_data->data, | |
815 | compare_data->data, compare_data->mask); | |
816 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
817 | IB_CM_COMPARE_SIZE); | |
818 | } | |
a977049d HR |
819 | |
820 | cm_id->state = IB_CM_LISTEN; | |
821 | ||
822 | spin_lock_irqsave(&cm.lock, flags); | |
823 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 SH |
824 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
825 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
826 | } else { |
827 | cm_id->service_id = service_id; | |
828 | cm_id->service_mask = service_mask; | |
829 | } | |
830 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
831 | spin_unlock_irqrestore(&cm.lock, flags); | |
832 | ||
833 | if (cur_cm_id_priv) { | |
834 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
835 | kfree(cm_id_priv->compare_data); |
836 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
837 | ret = -EBUSY; |
838 | } | |
839 | return ret; | |
840 | } | |
841 | EXPORT_SYMBOL(ib_cm_listen); | |
842 | ||
97f52eb4 SH |
843 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
844 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
845 | { |
846 | u64 hi_tid, low_tid; | |
847 | ||
848 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
849 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
850 | (msg_seq << 30)); | |
a977049d HR |
851 | return cpu_to_be64(hi_tid | low_tid); |
852 | } | |
853 | ||
854 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 855 | __be16 attr_id, __be64 tid) |
a977049d HR |
856 | { |
857 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
858 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
859 | hdr->class_version = IB_CM_CLASS_VERSION; | |
860 | hdr->method = IB_MGMT_METHOD_SEND; | |
861 | hdr->attr_id = attr_id; | |
862 | hdr->tid = tid; | |
863 | } | |
864 | ||
865 | static void cm_format_req(struct cm_req_msg *req_msg, | |
866 | struct cm_id_private *cm_id_priv, | |
867 | struct ib_cm_req_param *param) | |
868 | { | |
869 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, | |
870 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
871 | ||
872 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
873 | req_msg->service_id = param->service_id; | |
874 | req_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
875 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); | |
876 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
877 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
878 | cm_req_set_remote_resp_timeout(req_msg, | |
879 | param->remote_cm_response_timeout); | |
880 | cm_req_set_qp_type(req_msg, param->qp_type); | |
881 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
882 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
883 | cm_req_set_local_resp_timeout(req_msg, | |
884 | param->local_cm_response_timeout); | |
885 | cm_req_set_retry_count(req_msg, param->retry_count); | |
886 | req_msg->pkey = param->primary_path->pkey; | |
887 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
888 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
889 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
890 | cm_req_set_srq(req_msg, param->srq); | |
891 | ||
892 | req_msg->primary_local_lid = param->primary_path->slid; | |
893 | req_msg->primary_remote_lid = param->primary_path->dlid; | |
894 | req_msg->primary_local_gid = param->primary_path->sgid; | |
895 | req_msg->primary_remote_gid = param->primary_path->dgid; | |
896 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); | |
897 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); | |
898 | req_msg->primary_traffic_class = param->primary_path->traffic_class; | |
899 | req_msg->primary_hop_limit = param->primary_path->hop_limit; | |
900 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); | |
901 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ | |
902 | cm_req_set_primary_local_ack_timeout(req_msg, | |
903 | min(31, param->primary_path->packet_life_time + 1)); | |
904 | ||
905 | if (param->alternate_path) { | |
906 | req_msg->alt_local_lid = param->alternate_path->slid; | |
907 | req_msg->alt_remote_lid = param->alternate_path->dlid; | |
908 | req_msg->alt_local_gid = param->alternate_path->sgid; | |
909 | req_msg->alt_remote_gid = param->alternate_path->dgid; | |
910 | cm_req_set_alt_flow_label(req_msg, | |
911 | param->alternate_path->flow_label); | |
912 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); | |
913 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; | |
914 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; | |
915 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); | |
916 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ | |
917 | cm_req_set_alt_local_ack_timeout(req_msg, | |
918 | min(31, param->alternate_path->packet_life_time + 1)); | |
919 | } | |
920 | ||
921 | if (param->private_data && param->private_data_len) | |
922 | memcpy(req_msg->private_data, param->private_data, | |
923 | param->private_data_len); | |
924 | } | |
925 | ||
858119e1 | 926 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
927 | { |
928 | /* peer-to-peer not supported */ | |
929 | if (param->peer_to_peer) | |
930 | return -EINVAL; | |
931 | ||
932 | if (!param->primary_path) | |
933 | return -EINVAL; | |
934 | ||
935 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
936 | return -EINVAL; | |
937 | ||
938 | if (param->private_data && | |
939 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
940 | return -EINVAL; | |
941 | ||
942 | if (param->alternate_path && | |
943 | (param->alternate_path->pkey != param->primary_path->pkey || | |
944 | param->alternate_path->mtu != param->primary_path->mtu)) | |
945 | return -EINVAL; | |
946 | ||
947 | return 0; | |
948 | } | |
949 | ||
950 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
951 | struct ib_cm_req_param *param) | |
952 | { | |
953 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
954 | struct cm_req_msg *req_msg; |
955 | unsigned long flags; | |
956 | int ret; | |
957 | ||
958 | ret = cm_validate_req_param(param); | |
959 | if (ret) | |
960 | return ret; | |
961 | ||
962 | /* Verify that we're not in timewait. */ | |
963 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
964 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
965 | if (cm_id->state != IB_CM_IDLE) { | |
966 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
967 | ret = -EINVAL; | |
968 | goto out; | |
969 | } | |
970 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
971 | ||
972 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
973 | id.local_id); | |
974 | if (IS_ERR(cm_id_priv->timewait_info)) | |
975 | goto out; | |
976 | ||
977 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
978 | if (ret) | |
979 | goto error1; | |
980 | if (param->alternate_path) { | |
981 | ret = cm_init_av_by_path(param->alternate_path, | |
982 | &cm_id_priv->alt_av); | |
983 | if (ret) | |
984 | goto error1; | |
985 | } | |
986 | cm_id->service_id = param->service_id; | |
97f52eb4 | 987 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
988 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
989 | param->primary_path->packet_life_time) * 2 + | |
990 | cm_convert_to_ms( | |
991 | param->remote_cm_response_timeout); | |
992 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
993 | cm_id_priv->initiator_depth = param->initiator_depth; | |
994 | cm_id_priv->responder_resources = param->responder_resources; | |
995 | cm_id_priv->retry_count = param->retry_count; | |
996 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
ae7971a7 | 997 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
998 | |
999 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1000 | if (ret) | |
1001 | goto error1; | |
1002 | ||
1003 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1004 | cm_format_req(req_msg, cm_id_priv, param); | |
1005 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1006 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1007 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1008 | ||
1009 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1010 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
1011 | cm_id_priv->local_ack_timeout = | |
1012 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1013 | ||
1014 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1015 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1016 | if (ret) { |
1017 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1018 | goto error2; | |
1019 | } | |
1020 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1021 | cm_id->state = IB_CM_REQ_SENT; | |
1022 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1023 | return 0; | |
1024 | ||
1025 | error2: cm_free_msg(cm_id_priv->msg); | |
1026 | error1: kfree(cm_id_priv->timewait_info); | |
1027 | out: return ret; | |
1028 | } | |
1029 | EXPORT_SYMBOL(ib_send_cm_req); | |
1030 | ||
1031 | static int cm_issue_rej(struct cm_port *port, | |
1032 | struct ib_mad_recv_wc *mad_recv_wc, | |
1033 | enum ib_cm_rej_reason reason, | |
1034 | enum cm_msg_response msg_rejected, | |
1035 | void *ari, u8 ari_length) | |
1036 | { | |
1037 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1038 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1039 | int ret; | |
1040 | ||
1041 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1042 | if (ret) | |
1043 | return ret; | |
1044 | ||
1045 | /* We just need common CM header information. Cast to any message. */ | |
1046 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1047 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1048 | ||
1049 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1050 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1051 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1052 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1053 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1054 | |
1055 | if (ari && ari_length) { | |
1056 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1057 | memcpy(rej_msg->ari, ari, ari_length); | |
1058 | } | |
1059 | ||
34816ad9 | 1060 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1061 | if (ret) |
1062 | cm_free_msg(msg); | |
1063 | ||
1064 | return ret; | |
1065 | } | |
1066 | ||
97f52eb4 SH |
1067 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1068 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1069 | { |
1070 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1071 | ((local_ca_guid == remote_ca_guid) && | |
1072 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1073 | } | |
1074 | ||
858119e1 | 1075 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1076 | struct ib_sa_path_rec *primary_path, |
1077 | struct ib_sa_path_rec *alt_path) | |
1078 | { | |
1079 | memset(primary_path, 0, sizeof *primary_path); | |
1080 | primary_path->dgid = req_msg->primary_local_gid; | |
1081 | primary_path->sgid = req_msg->primary_remote_gid; | |
1082 | primary_path->dlid = req_msg->primary_local_lid; | |
1083 | primary_path->slid = req_msg->primary_remote_lid; | |
1084 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1085 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1086 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1087 | primary_path->reversible = 1; | |
1088 | primary_path->pkey = req_msg->pkey; | |
1089 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1090 | primary_path->mtu_selector = IB_SA_EQ; | |
1091 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1092 | primary_path->rate_selector = IB_SA_EQ; | |
1093 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1094 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1095 | primary_path->packet_life_time = | |
1096 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1097 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1098 | ||
1099 | if (req_msg->alt_local_lid) { | |
1100 | memset(alt_path, 0, sizeof *alt_path); | |
1101 | alt_path->dgid = req_msg->alt_local_gid; | |
1102 | alt_path->sgid = req_msg->alt_remote_gid; | |
1103 | alt_path->dlid = req_msg->alt_local_lid; | |
1104 | alt_path->slid = req_msg->alt_remote_lid; | |
1105 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1106 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1107 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1108 | alt_path->reversible = 1; | |
1109 | alt_path->pkey = req_msg->pkey; | |
1110 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1111 | alt_path->mtu_selector = IB_SA_EQ; | |
1112 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1113 | alt_path->rate_selector = IB_SA_EQ; | |
1114 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1115 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1116 | alt_path->packet_life_time = | |
1117 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1118 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | static void cm_format_req_event(struct cm_work *work, | |
1123 | struct cm_id_private *cm_id_priv, | |
1124 | struct ib_cm_id *listen_id) | |
1125 | { | |
1126 | struct cm_req_msg *req_msg; | |
1127 | struct ib_cm_req_event_param *param; | |
1128 | ||
1129 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1130 | param = &work->cm_event.param.req_rcvd; | |
1131 | param->listen_id = listen_id; | |
a977049d HR |
1132 | param->port = cm_id_priv->av.port->port_num; |
1133 | param->primary_path = &work->path[0]; | |
1134 | if (req_msg->alt_local_lid) | |
1135 | param->alternate_path = &work->path[1]; | |
1136 | else | |
1137 | param->alternate_path = NULL; | |
1138 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1139 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1140 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1141 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1142 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1143 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1144 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1145 | param->local_cm_response_timeout = | |
1146 | cm_req_get_remote_resp_timeout(req_msg); | |
1147 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1148 | param->remote_cm_response_timeout = | |
1149 | cm_req_get_local_resp_timeout(req_msg); | |
1150 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1151 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1152 | param->srq = cm_req_get_srq(req_msg); | |
1153 | work->cm_event.private_data = &req_msg->private_data; | |
1154 | } | |
1155 | ||
1156 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1157 | struct cm_work *work) | |
1158 | { | |
1159 | unsigned long flags; | |
1160 | int ret; | |
1161 | ||
1162 | /* We will typically only have the current event to report. */ | |
1163 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1164 | cm_free_work(work); | |
1165 | ||
1166 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
1167 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1168 | work = cm_dequeue_work(cm_id_priv); | |
1169 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1170 | BUG_ON(!work); | |
1171 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1172 | &work->cm_event); | |
1173 | cm_free_work(work); | |
1174 | } | |
1175 | cm_deref_id(cm_id_priv); | |
1176 | if (ret) | |
1177 | ib_destroy_cm_id(&cm_id_priv->id); | |
1178 | } | |
1179 | ||
1180 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1181 | struct cm_id_private *cm_id_priv, | |
1182 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1183 | const void *private_data, u8 private_data_len) | |
1184 | { | |
1185 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1186 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1187 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1188 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1189 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1190 | ||
1191 | if (private_data && private_data_len) | |
1192 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1193 | } | |
1194 | ||
1195 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1196 | struct cm_id_private *cm_id_priv, | |
1197 | enum ib_cm_rej_reason reason, | |
1198 | void *ari, | |
1199 | u8 ari_length, | |
1200 | const void *private_data, | |
1201 | u8 private_data_len) | |
1202 | { | |
1203 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1204 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1205 | ||
1206 | switch(cm_id_priv->id.state) { | |
1207 | case IB_CM_REQ_RCVD: | |
1208 | rej_msg->local_comm_id = 0; | |
1209 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1210 | break; | |
1211 | case IB_CM_MRA_REQ_SENT: | |
1212 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1213 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1214 | break; | |
1215 | case IB_CM_REP_RCVD: | |
1216 | case IB_CM_MRA_REP_SENT: | |
1217 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1218 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1219 | break; | |
1220 | default: | |
1221 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1222 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1223 | break; | |
1224 | } | |
1225 | ||
97f52eb4 | 1226 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1227 | if (ari && ari_length) { |
1228 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1229 | memcpy(rej_msg->ari, ari, ari_length); | |
1230 | } | |
1231 | ||
1232 | if (private_data && private_data_len) | |
1233 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1234 | } | |
1235 | ||
1236 | static void cm_dup_req_handler(struct cm_work *work, | |
1237 | struct cm_id_private *cm_id_priv) | |
1238 | { | |
1239 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1240 | unsigned long flags; |
1241 | int ret; | |
1242 | ||
1243 | /* Quick state check to discard duplicate REQs. */ | |
1244 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1245 | return; | |
1246 | ||
1247 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1248 | if (ret) | |
1249 | return; | |
1250 | ||
1251 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1252 | switch (cm_id_priv->id.state) { | |
1253 | case IB_CM_MRA_REQ_SENT: | |
1254 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1255 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1256 | cm_id_priv->private_data, | |
1257 | cm_id_priv->private_data_len); | |
1258 | break; | |
1259 | case IB_CM_TIMEWAIT: | |
1260 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1261 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1262 | break; | |
1263 | default: | |
1264 | goto unlock; | |
1265 | } | |
1266 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1267 | ||
34816ad9 | 1268 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1269 | if (ret) |
1270 | goto free; | |
1271 | return; | |
1272 | ||
1273 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1274 | free: cm_free_msg(msg); | |
1275 | } | |
1276 | ||
1277 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1278 | struct cm_id_private *cm_id_priv) | |
1279 | { | |
1280 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1281 | struct cm_timewait_info *timewait_info; | |
1282 | struct cm_req_msg *req_msg; | |
1283 | unsigned long flags; | |
1284 | ||
1285 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1286 | ||
1287 | /* Check for duplicate REQ and stale connections. */ | |
1288 | spin_lock_irqsave(&cm.lock, flags); | |
1289 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); | |
1290 | if (!timewait_info) | |
1291 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1292 | ||
1293 | if (timewait_info) { | |
1294 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1295 | timewait_info->work.remote_id); | |
1296 | spin_unlock_irqrestore(&cm.lock, flags); | |
1297 | if (cur_cm_id_priv) { | |
1298 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1299 | cm_deref_id(cur_cm_id_priv); | |
1300 | } else | |
1301 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1302 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1303 | NULL, 0); | |
1304 | goto error; | |
1305 | } | |
1306 | ||
1307 | /* Find matching listen request. */ | |
07d357d0 | 1308 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1309 | req_msg->service_id, |
1310 | req_msg->private_data); | |
a977049d HR |
1311 | if (!listen_cm_id_priv) { |
1312 | spin_unlock_irqrestore(&cm.lock, flags); | |
1313 | cm_issue_rej(work->port, work->mad_recv_wc, | |
1314 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1315 | NULL, 0); | |
1316 | goto error; | |
1317 | } | |
1318 | atomic_inc(&listen_cm_id_priv->refcount); | |
1319 | atomic_inc(&cm_id_priv->refcount); | |
1320 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1321 | atomic_inc(&cm_id_priv->work_count); | |
1322 | spin_unlock_irqrestore(&cm.lock, flags); | |
1323 | return listen_cm_id_priv; | |
1324 | ||
1325 | error: cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1326 | return NULL; | |
1327 | } | |
1328 | ||
1329 | static int cm_req_handler(struct cm_work *work) | |
1330 | { | |
1331 | struct ib_cm_id *cm_id; | |
1332 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1333 | struct cm_req_msg *req_msg; | |
1334 | int ret; | |
1335 | ||
1336 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1337 | ||
07d357d0 | 1338 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
1339 | if (IS_ERR(cm_id)) |
1340 | return PTR_ERR(cm_id); | |
1341 | ||
1342 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1343 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1344 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
1345 | &cm_id_priv->av); | |
1346 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1347 | id.local_id); | |
1348 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1349 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
1350 | goto error1; | |
1351 | } | |
1352 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1353 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1354 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1355 | ||
1356 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1357 | if (!listen_cm_id_priv) { | |
1358 | ret = -EINVAL; | |
1359 | goto error2; | |
1360 | } | |
1361 | ||
1362 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1363 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1364 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1365 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1366 | |
1367 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); | |
1368 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
1369 | if (ret) | |
1370 | goto error3; | |
1371 | if (req_msg->alt_local_lid) { | |
1372 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
1373 | if (ret) | |
1374 | goto error3; | |
1375 | } | |
1376 | cm_id_priv->tid = req_msg->hdr.tid; | |
1377 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1378 | cm_req_get_local_resp_timeout(req_msg)); | |
1379 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1380 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1381 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1382 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1383 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
1384 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); | |
1385 | cm_id_priv->local_ack_timeout = | |
1386 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1387 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); | |
1388 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1389 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1390 | |
1391 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1392 | cm_process_work(cm_id_priv, work); | |
1393 | cm_deref_id(listen_cm_id_priv); | |
1394 | return 0; | |
1395 | ||
1396 | error3: atomic_dec(&cm_id_priv->refcount); | |
1397 | cm_deref_id(listen_cm_id_priv); | |
1398 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
1399 | error2: kfree(cm_id_priv->timewait_info); | |
1b205c2d | 1400 | cm_id_priv->timewait_info = NULL; |
a977049d HR |
1401 | error1: ib_destroy_cm_id(&cm_id_priv->id); |
1402 | return ret; | |
1403 | } | |
1404 | ||
1405 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1406 | struct cm_id_private *cm_id_priv, | |
1407 | struct ib_cm_rep_param *param) | |
1408 | { | |
1409 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1410 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1411 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1412 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1413 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1414 | rep_msg->resp_resources = param->responder_resources; | |
1415 | rep_msg->initiator_depth = param->initiator_depth; | |
1416 | cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); | |
1417 | cm_rep_set_failover(rep_msg, param->failover_accepted); | |
1418 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1419 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1420 | cm_rep_set_srq(rep_msg, param->srq); | |
1421 | rep_msg->local_ca_guid = cm_id_priv->av.port->cm_dev->ca_guid; | |
1422 | ||
1423 | if (param->private_data && param->private_data_len) | |
1424 | memcpy(rep_msg->private_data, param->private_data, | |
1425 | param->private_data_len); | |
1426 | } | |
1427 | ||
1428 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1429 | struct ib_cm_rep_param *param) | |
1430 | { | |
1431 | struct cm_id_private *cm_id_priv; | |
1432 | struct ib_mad_send_buf *msg; | |
1433 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1434 | unsigned long flags; |
1435 | int ret; | |
1436 | ||
1437 | if (param->private_data && | |
1438 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1439 | return -EINVAL; | |
1440 | ||
1441 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1442 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1443 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1444 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1445 | ret = -EINVAL; | |
1446 | goto out; | |
1447 | } | |
1448 | ||
1449 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1450 | if (ret) | |
1451 | goto out; | |
1452 | ||
1453 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1454 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1455 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1456 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1457 | ||
34816ad9 | 1458 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1459 | if (ret) { |
1460 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1461 | cm_free_msg(msg); | |
1462 | return ret; | |
1463 | } | |
1464 | ||
1465 | cm_id->state = IB_CM_REP_SENT; | |
1466 | cm_id_priv->msg = msg; | |
1467 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1468 | cm_id_priv->responder_resources = param->responder_resources; | |
1469 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1470 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1471 | ||
1472 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1473 | return ret; | |
1474 | } | |
1475 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1476 | ||
1477 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1478 | struct cm_id_private *cm_id_priv, | |
1479 | const void *private_data, | |
1480 | u8 private_data_len) | |
1481 | { | |
1482 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1483 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1484 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1485 | ||
1486 | if (private_data && private_data_len) | |
1487 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1488 | } | |
1489 | ||
1490 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1491 | const void *private_data, | |
1492 | u8 private_data_len) | |
1493 | { | |
1494 | struct cm_id_private *cm_id_priv; | |
1495 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1496 | unsigned long flags; |
1497 | void *data; | |
1498 | int ret; | |
1499 | ||
1500 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1501 | return -EINVAL; | |
1502 | ||
1503 | data = cm_copy_private_data(private_data, private_data_len); | |
1504 | if (IS_ERR(data)) | |
1505 | return PTR_ERR(data); | |
1506 | ||
1507 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1508 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1509 | if (cm_id->state != IB_CM_REP_RCVD && | |
1510 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1511 | ret = -EINVAL; | |
1512 | goto error; | |
1513 | } | |
1514 | ||
1515 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1516 | if (ret) | |
1517 | goto error; | |
1518 | ||
1519 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1520 | private_data, private_data_len); | |
1521 | ||
34816ad9 | 1522 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1523 | if (ret) { |
1524 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1525 | cm_free_msg(msg); | |
1526 | kfree(data); | |
1527 | return ret; | |
1528 | } | |
1529 | ||
1530 | cm_id->state = IB_CM_ESTABLISHED; | |
1531 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1532 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1533 | return 0; | |
1534 | ||
1535 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1536 | kfree(data); | |
1537 | return ret; | |
1538 | } | |
1539 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1540 | ||
1541 | static void cm_format_rep_event(struct cm_work *work) | |
1542 | { | |
1543 | struct cm_rep_msg *rep_msg; | |
1544 | struct ib_cm_rep_event_param *param; | |
1545 | ||
1546 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1547 | param = &work->cm_event.param.rep_rcvd; | |
1548 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1549 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1550 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1551 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1552 | param->responder_resources = rep_msg->initiator_depth; | |
1553 | param->initiator_depth = rep_msg->resp_resources; | |
1554 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1555 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1556 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1557 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1558 | param->srq = cm_rep_get_srq(rep_msg); | |
1559 | work->cm_event.private_data = &rep_msg->private_data; | |
1560 | } | |
1561 | ||
1562 | static void cm_dup_rep_handler(struct cm_work *work) | |
1563 | { | |
1564 | struct cm_id_private *cm_id_priv; | |
1565 | struct cm_rep_msg *rep_msg; | |
1566 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1567 | unsigned long flags; |
1568 | int ret; | |
1569 | ||
1570 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1571 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1572 | rep_msg->local_comm_id); | |
1573 | if (!cm_id_priv) | |
1574 | return; | |
1575 | ||
1576 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1577 | if (ret) | |
1578 | goto deref; | |
1579 | ||
1580 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1581 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) | |
1582 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1583 | cm_id_priv->private_data, | |
1584 | cm_id_priv->private_data_len); | |
1585 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1586 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1587 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1588 | cm_id_priv->private_data, | |
1589 | cm_id_priv->private_data_len); | |
1590 | else | |
1591 | goto unlock; | |
1592 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1593 | ||
34816ad9 | 1594 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1595 | if (ret) |
1596 | goto free; | |
1597 | goto deref; | |
1598 | ||
1599 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1600 | free: cm_free_msg(msg); | |
1601 | deref: cm_deref_id(cm_id_priv); | |
1602 | } | |
1603 | ||
1604 | static int cm_rep_handler(struct cm_work *work) | |
1605 | { | |
1606 | struct cm_id_private *cm_id_priv; | |
1607 | struct cm_rep_msg *rep_msg; | |
1608 | unsigned long flags; | |
1609 | int ret; | |
1610 | ||
1611 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1612 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1613 | if (!cm_id_priv) { | |
1614 | cm_dup_rep_handler(work); | |
1615 | return -EINVAL; | |
1616 | } | |
1617 | ||
87fd1a11 SH |
1618 | cm_format_rep_event(work); |
1619 | ||
1620 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1621 | switch (cm_id_priv->id.state) { | |
1622 | case IB_CM_REQ_SENT: | |
1623 | case IB_CM_MRA_REQ_RCVD: | |
1624 | break; | |
1625 | default: | |
1626 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1627 | ret = -EINVAL; | |
1628 | goto error; | |
1629 | } | |
1630 | ||
a977049d HR |
1631 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1632 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1633 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1634 | ||
87fd1a11 | 1635 | spin_lock(&cm.lock); |
a977049d HR |
1636 | /* Check for duplicate REP. */ |
1637 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1638 | spin_unlock(&cm.lock); |
1639 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1640 | ret = -EINVAL; |
1641 | goto error; | |
1642 | } | |
1643 | /* Check for a stale connection. */ | |
1644 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1645 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1646 | &cm.remote_id_table); | |
1647 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1648 | spin_unlock(&cm.lock); | |
1649 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
1650 | cm_issue_rej(work->port, work->mad_recv_wc, |
1651 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1652 | NULL, 0); | |
1653 | ret = -EINVAL; | |
1654 | goto error; | |
1655 | } | |
87fd1a11 | 1656 | spin_unlock(&cm.lock); |
a977049d | 1657 | |
a977049d HR |
1658 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1659 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1660 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1661 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1662 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1663 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1664 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1665 | ||
1666 | /* todo: handle peer_to_peer */ | |
1667 | ||
34816ad9 | 1668 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1669 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1670 | if (!ret) | |
1671 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1672 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1673 | ||
1674 | if (ret) | |
1675 | cm_process_work(cm_id_priv, work); | |
1676 | else | |
1677 | cm_deref_id(cm_id_priv); | |
1678 | return 0; | |
1679 | ||
87fd1a11 | 1680 | error: |
a977049d HR |
1681 | cm_deref_id(cm_id_priv); |
1682 | return ret; | |
1683 | } | |
1684 | ||
1685 | static int cm_establish_handler(struct cm_work *work) | |
1686 | { | |
1687 | struct cm_id_private *cm_id_priv; | |
1688 | unsigned long flags; | |
1689 | int ret; | |
1690 | ||
1691 | /* See comment in ib_cm_establish about lookup. */ | |
1692 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); | |
1693 | if (!cm_id_priv) | |
1694 | return -EINVAL; | |
1695 | ||
1696 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1697 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { | |
1698 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1699 | goto out; | |
1700 | } | |
1701 | ||
34816ad9 | 1702 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1703 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1704 | if (!ret) | |
1705 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1706 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1707 | ||
1708 | if (ret) | |
1709 | cm_process_work(cm_id_priv, work); | |
1710 | else | |
1711 | cm_deref_id(cm_id_priv); | |
1712 | return 0; | |
1713 | out: | |
1714 | cm_deref_id(cm_id_priv); | |
1715 | return -EINVAL; | |
1716 | } | |
1717 | ||
1718 | static int cm_rtu_handler(struct cm_work *work) | |
1719 | { | |
1720 | struct cm_id_private *cm_id_priv; | |
1721 | struct cm_rtu_msg *rtu_msg; | |
1722 | unsigned long flags; | |
1723 | int ret; | |
1724 | ||
1725 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1726 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1727 | rtu_msg->local_comm_id); | |
1728 | if (!cm_id_priv) | |
1729 | return -EINVAL; | |
1730 | ||
1731 | work->cm_event.private_data = &rtu_msg->private_data; | |
1732 | ||
1733 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1734 | if (cm_id_priv->id.state != IB_CM_REP_SENT && | |
1735 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
1736 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1737 | goto out; | |
1738 | } | |
1739 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1740 | ||
34816ad9 | 1741 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1742 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1743 | if (!ret) | |
1744 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1745 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1746 | ||
1747 | if (ret) | |
1748 | cm_process_work(cm_id_priv, work); | |
1749 | else | |
1750 | cm_deref_id(cm_id_priv); | |
1751 | return 0; | |
1752 | out: | |
1753 | cm_deref_id(cm_id_priv); | |
1754 | return -EINVAL; | |
1755 | } | |
1756 | ||
1757 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1758 | struct cm_id_private *cm_id_priv, | |
1759 | const void *private_data, | |
1760 | u8 private_data_len) | |
1761 | { | |
1762 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1763 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1764 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1765 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1766 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1767 | ||
1768 | if (private_data && private_data_len) | |
1769 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1770 | } | |
1771 | ||
1772 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1773 | const void *private_data, | |
1774 | u8 private_data_len) | |
1775 | { | |
1776 | struct cm_id_private *cm_id_priv; | |
1777 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1778 | unsigned long flags; |
1779 | int ret; | |
1780 | ||
1781 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1782 | return -EINVAL; | |
1783 | ||
1784 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1785 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1786 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1787 | ret = -EINVAL; | |
1788 | goto out; | |
1789 | } | |
1790 | ||
1791 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1792 | if (ret) { | |
1793 | cm_enter_timewait(cm_id_priv); | |
1794 | goto out; | |
1795 | } | |
1796 | ||
1797 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1798 | private_data, private_data_len); | |
34816ad9 | 1799 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1800 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
1801 | ||
34816ad9 | 1802 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1803 | if (ret) { |
1804 | cm_enter_timewait(cm_id_priv); | |
1805 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1806 | cm_free_msg(msg); | |
1807 | return ret; | |
1808 | } | |
1809 | ||
1810 | cm_id->state = IB_CM_DREQ_SENT; | |
1811 | cm_id_priv->msg = msg; | |
1812 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1813 | return ret; | |
1814 | } | |
1815 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1816 | ||
1817 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1818 | struct cm_id_private *cm_id_priv, | |
1819 | const void *private_data, | |
1820 | u8 private_data_len) | |
1821 | { | |
1822 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1823 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1824 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1825 | ||
1826 | if (private_data && private_data_len) | |
1827 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
1828 | } | |
1829 | ||
1830 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
1831 | const void *private_data, | |
1832 | u8 private_data_len) | |
1833 | { | |
1834 | struct cm_id_private *cm_id_priv; | |
1835 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1836 | unsigned long flags; |
1837 | void *data; | |
1838 | int ret; | |
1839 | ||
1840 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
1841 | return -EINVAL; | |
1842 | ||
1843 | data = cm_copy_private_data(private_data, private_data_len); | |
1844 | if (IS_ERR(data)) | |
1845 | return PTR_ERR(data); | |
1846 | ||
1847 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1848 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1849 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
1850 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1851 | kfree(data); | |
1852 | return -EINVAL; | |
1853 | } | |
1854 | ||
1855 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1856 | cm_enter_timewait(cm_id_priv); | |
1857 | ||
1858 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1859 | if (ret) | |
1860 | goto out; | |
1861 | ||
1862 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1863 | private_data, private_data_len); | |
1864 | ||
34816ad9 | 1865 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1866 | if (ret) { |
1867 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1868 | cm_free_msg(msg); | |
1869 | return ret; | |
1870 | } | |
1871 | ||
1872 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1873 | return ret; | |
1874 | } | |
1875 | EXPORT_SYMBOL(ib_send_cm_drep); | |
1876 | ||
1877 | static int cm_dreq_handler(struct cm_work *work) | |
1878 | { | |
1879 | struct cm_id_private *cm_id_priv; | |
1880 | struct cm_dreq_msg *dreq_msg; | |
1881 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1882 | unsigned long flags; |
1883 | int ret; | |
1884 | ||
1885 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
1886 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
1887 | dreq_msg->local_comm_id); | |
1888 | if (!cm_id_priv) | |
1889 | return -EINVAL; | |
1890 | ||
1891 | work->cm_event.private_data = &dreq_msg->private_data; | |
1892 | ||
1893 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1894 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) | |
1895 | goto unlock; | |
1896 | ||
1897 | switch (cm_id_priv->id.state) { | |
1898 | case IB_CM_REP_SENT: | |
1899 | case IB_CM_DREQ_SENT: | |
34816ad9 | 1900 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1901 | break; |
1902 | case IB_CM_ESTABLISHED: | |
1903 | case IB_CM_MRA_REP_RCVD: | |
1904 | break; | |
1905 | case IB_CM_TIMEWAIT: | |
1906 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
1907 | goto unlock; | |
1908 | ||
1909 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1910 | cm_id_priv->private_data, | |
1911 | cm_id_priv->private_data_len); | |
1912 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1913 | ||
34816ad9 | 1914 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
1915 | cm_free_msg(msg); |
1916 | goto deref; | |
1917 | default: | |
1918 | goto unlock; | |
1919 | } | |
1920 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
1921 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
1922 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
1923 | if (!ret) | |
1924 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1925 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1926 | ||
1927 | if (ret) | |
1928 | cm_process_work(cm_id_priv, work); | |
1929 | else | |
1930 | cm_deref_id(cm_id_priv); | |
1931 | return 0; | |
1932 | ||
1933 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1934 | deref: cm_deref_id(cm_id_priv); | |
1935 | return -EINVAL; | |
1936 | } | |
1937 | ||
1938 | static int cm_drep_handler(struct cm_work *work) | |
1939 | { | |
1940 | struct cm_id_private *cm_id_priv; | |
1941 | struct cm_drep_msg *drep_msg; | |
1942 | unsigned long flags; | |
1943 | int ret; | |
1944 | ||
1945 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1946 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
1947 | drep_msg->local_comm_id); | |
1948 | if (!cm_id_priv) | |
1949 | return -EINVAL; | |
1950 | ||
1951 | work->cm_event.private_data = &drep_msg->private_data; | |
1952 | ||
1953 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1954 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && | |
1955 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
1956 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1957 | goto out; | |
1958 | } | |
1959 | cm_enter_timewait(cm_id_priv); | |
1960 | ||
34816ad9 | 1961 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1962 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1963 | if (!ret) | |
1964 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
1965 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1966 | ||
1967 | if (ret) | |
1968 | cm_process_work(cm_id_priv, work); | |
1969 | else | |
1970 | cm_deref_id(cm_id_priv); | |
1971 | return 0; | |
1972 | out: | |
1973 | cm_deref_id(cm_id_priv); | |
1974 | return -EINVAL; | |
1975 | } | |
1976 | ||
1977 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
1978 | enum ib_cm_rej_reason reason, | |
1979 | void *ari, | |
1980 | u8 ari_length, | |
1981 | const void *private_data, | |
1982 | u8 private_data_len) | |
1983 | { | |
1984 | struct cm_id_private *cm_id_priv; | |
1985 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1986 | unsigned long flags; |
1987 | int ret; | |
1988 | ||
1989 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
1990 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
1991 | return -EINVAL; | |
1992 | ||
1993 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1994 | ||
1995 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1996 | switch (cm_id->state) { | |
1997 | case IB_CM_REQ_SENT: | |
1998 | case IB_CM_MRA_REQ_RCVD: | |
1999 | case IB_CM_REQ_RCVD: | |
2000 | case IB_CM_MRA_REQ_SENT: | |
2001 | case IB_CM_REP_RCVD: | |
2002 | case IB_CM_MRA_REP_SENT: | |
2003 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2004 | if (!ret) | |
2005 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2006 | cm_id_priv, reason, ari, ari_length, | |
2007 | private_data, private_data_len); | |
2008 | ||
2009 | cm_reset_to_idle(cm_id_priv); | |
2010 | break; | |
2011 | case IB_CM_REP_SENT: | |
2012 | case IB_CM_MRA_REP_RCVD: | |
2013 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2014 | if (!ret) | |
2015 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2016 | cm_id_priv, reason, ari, ari_length, | |
2017 | private_data, private_data_len); | |
2018 | ||
2019 | cm_enter_timewait(cm_id_priv); | |
2020 | break; | |
2021 | default: | |
2022 | ret = -EINVAL; | |
2023 | goto out; | |
2024 | } | |
2025 | ||
2026 | if (ret) | |
2027 | goto out; | |
2028 | ||
34816ad9 | 2029 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2030 | if (ret) |
2031 | cm_free_msg(msg); | |
2032 | ||
2033 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2034 | return ret; | |
2035 | } | |
2036 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2037 | ||
2038 | static void cm_format_rej_event(struct cm_work *work) | |
2039 | { | |
2040 | struct cm_rej_msg *rej_msg; | |
2041 | struct ib_cm_rej_event_param *param; | |
2042 | ||
2043 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2044 | param = &work->cm_event.param.rej_rcvd; | |
2045 | param->ari = rej_msg->ari; | |
2046 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2047 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2048 | work->cm_event.private_data = &rej_msg->private_data; |
2049 | } | |
2050 | ||
2051 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2052 | { | |
2053 | struct cm_timewait_info *timewait_info; | |
2054 | struct cm_id_private *cm_id_priv; | |
2055 | unsigned long flags; | |
97f52eb4 | 2056 | __be32 remote_id; |
a977049d HR |
2057 | |
2058 | remote_id = rej_msg->local_comm_id; | |
2059 | ||
97f52eb4 | 2060 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
a977049d | 2061 | spin_lock_irqsave(&cm.lock, flags); |
97f52eb4 | 2062 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2063 | remote_id); |
2064 | if (!timewait_info) { | |
2065 | spin_unlock_irqrestore(&cm.lock, flags); | |
2066 | return NULL; | |
2067 | } | |
2068 | cm_id_priv = idr_find(&cm.local_id_table, | |
97f52eb4 | 2069 | (__force int) timewait_info->work.local_id); |
a977049d HR |
2070 | if (cm_id_priv) { |
2071 | if (cm_id_priv->id.remote_id == remote_id) | |
2072 | atomic_inc(&cm_id_priv->refcount); | |
2073 | else | |
2074 | cm_id_priv = NULL; | |
2075 | } | |
2076 | spin_unlock_irqrestore(&cm.lock, flags); | |
2077 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) | |
2078 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2079 | else | |
2080 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2081 | ||
2082 | return cm_id_priv; | |
2083 | } | |
2084 | ||
2085 | static int cm_rej_handler(struct cm_work *work) | |
2086 | { | |
2087 | struct cm_id_private *cm_id_priv; | |
2088 | struct cm_rej_msg *rej_msg; | |
2089 | unsigned long flags; | |
2090 | int ret; | |
2091 | ||
2092 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2093 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2094 | if (!cm_id_priv) | |
2095 | return -EINVAL; | |
2096 | ||
2097 | cm_format_rej_event(work); | |
2098 | ||
2099 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2100 | switch (cm_id_priv->id.state) { | |
2101 | case IB_CM_REQ_SENT: | |
2102 | case IB_CM_MRA_REQ_RCVD: | |
2103 | case IB_CM_REP_SENT: | |
2104 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2105 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2106 | /* fall through */ |
2107 | case IB_CM_REQ_RCVD: | |
2108 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2109 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2110 | cm_enter_timewait(cm_id_priv); |
2111 | else | |
2112 | cm_reset_to_idle(cm_id_priv); | |
2113 | break; | |
2114 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2115 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2116 | /* fall through */ |
2117 | case IB_CM_REP_RCVD: | |
2118 | case IB_CM_MRA_REP_SENT: | |
2119 | case IB_CM_ESTABLISHED: | |
2120 | cm_enter_timewait(cm_id_priv); | |
2121 | break; | |
2122 | default: | |
2123 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2124 | ret = -EINVAL; | |
2125 | goto out; | |
2126 | } | |
2127 | ||
2128 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2129 | if (!ret) | |
2130 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2131 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2132 | ||
2133 | if (ret) | |
2134 | cm_process_work(cm_id_priv, work); | |
2135 | else | |
2136 | cm_deref_id(cm_id_priv); | |
2137 | return 0; | |
2138 | out: | |
2139 | cm_deref_id(cm_id_priv); | |
2140 | return -EINVAL; | |
2141 | } | |
2142 | ||
2143 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2144 | u8 service_timeout, | |
2145 | const void *private_data, | |
2146 | u8 private_data_len) | |
2147 | { | |
2148 | struct cm_id_private *cm_id_priv; | |
2149 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2150 | void *data; |
2151 | unsigned long flags; | |
2152 | int ret; | |
2153 | ||
2154 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2155 | return -EINVAL; | |
2156 | ||
2157 | data = cm_copy_private_data(private_data, private_data_len); | |
2158 | if (IS_ERR(data)) | |
2159 | return PTR_ERR(data); | |
2160 | ||
2161 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2162 | ||
2163 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2164 | switch(cm_id_priv->id.state) { | |
2165 | case IB_CM_REQ_RCVD: | |
2166 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2167 | if (ret) | |
2168 | goto error1; | |
2169 | ||
2170 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2171 | CM_MSG_RESPONSE_REQ, service_timeout, | |
2172 | private_data, private_data_len); | |
34816ad9 | 2173 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2174 | if (ret) |
2175 | goto error2; | |
2176 | cm_id->state = IB_CM_MRA_REQ_SENT; | |
2177 | break; | |
2178 | case IB_CM_REP_RCVD: | |
2179 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2180 | if (ret) | |
2181 | goto error1; | |
2182 | ||
2183 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2184 | CM_MSG_RESPONSE_REP, service_timeout, | |
2185 | private_data, private_data_len); | |
34816ad9 | 2186 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2187 | if (ret) |
2188 | goto error2; | |
2189 | cm_id->state = IB_CM_MRA_REP_SENT; | |
2190 | break; | |
2191 | case IB_CM_ESTABLISHED: | |
2192 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2193 | if (ret) | |
2194 | goto error1; | |
2195 | ||
2196 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2197 | CM_MSG_RESPONSE_OTHER, service_timeout, | |
2198 | private_data, private_data_len); | |
34816ad9 | 2199 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2200 | if (ret) |
2201 | goto error2; | |
2202 | cm_id->lap_state = IB_CM_MRA_LAP_SENT; | |
2203 | break; | |
2204 | default: | |
2205 | ret = -EINVAL; | |
2206 | goto error1; | |
2207 | } | |
2208 | cm_id_priv->service_timeout = service_timeout; | |
2209 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2210 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2211 | return 0; | |
2212 | ||
2213 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2214 | kfree(data); | |
2215 | return ret; | |
2216 | ||
2217 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2218 | kfree(data); | |
2219 | cm_free_msg(msg); | |
2220 | return ret; | |
2221 | } | |
2222 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2223 | ||
2224 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2225 | { | |
2226 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2227 | case CM_MSG_RESPONSE_REQ: | |
2228 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2229 | case CM_MSG_RESPONSE_REP: | |
2230 | case CM_MSG_RESPONSE_OTHER: | |
2231 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2232 | mra_msg->local_comm_id); | |
2233 | default: | |
2234 | return NULL; | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | static int cm_mra_handler(struct cm_work *work) | |
2239 | { | |
2240 | struct cm_id_private *cm_id_priv; | |
2241 | struct cm_mra_msg *mra_msg; | |
2242 | unsigned long flags; | |
2243 | int timeout, ret; | |
2244 | ||
2245 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2246 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2247 | if (!cm_id_priv) | |
2248 | return -EINVAL; | |
2249 | ||
2250 | work->cm_event.private_data = &mra_msg->private_data; | |
2251 | work->cm_event.param.mra_rcvd.service_timeout = | |
2252 | cm_mra_get_service_timeout(mra_msg); | |
2253 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
2254 | cm_convert_to_ms(cm_id_priv->av.packet_life_time); | |
2255 | ||
2256 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2257 | switch (cm_id_priv->id.state) { | |
2258 | case IB_CM_REQ_SENT: | |
2259 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2260 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2261 | cm_id_priv->msg, timeout)) |
a977049d HR |
2262 | goto out; |
2263 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2264 | break; | |
2265 | case IB_CM_REP_SENT: | |
2266 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2267 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2268 | cm_id_priv->msg, timeout)) |
a977049d HR |
2269 | goto out; |
2270 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2271 | break; | |
2272 | case IB_CM_ESTABLISHED: | |
2273 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2274 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2275 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2276 | cm_id_priv->msg, timeout)) |
a977049d HR |
2277 | goto out; |
2278 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; | |
2279 | break; | |
2280 | default: | |
2281 | goto out; | |
2282 | } | |
2283 | ||
2284 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2285 | cm_id_priv->id.state; | |
2286 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2287 | if (!ret) | |
2288 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2289 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2290 | ||
2291 | if (ret) | |
2292 | cm_process_work(cm_id_priv, work); | |
2293 | else | |
2294 | cm_deref_id(cm_id_priv); | |
2295 | return 0; | |
2296 | out: | |
2297 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2298 | cm_deref_id(cm_id_priv); | |
2299 | return -EINVAL; | |
2300 | } | |
2301 | ||
2302 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2303 | struct cm_id_private *cm_id_priv, | |
2304 | struct ib_sa_path_rec *alternate_path, | |
2305 | const void *private_data, | |
2306 | u8 private_data_len) | |
2307 | { | |
2308 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2309 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2310 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2311 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2312 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2313 | /* todo: need remote CM response timeout */ | |
2314 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2315 | lap_msg->alt_local_lid = alternate_path->slid; | |
2316 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2317 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2318 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2319 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2320 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2321 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2322 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2323 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2324 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2325 | cm_lap_set_local_ack_timeout(lap_msg, | |
2326 | min(31, alternate_path->packet_life_time + 1)); | |
2327 | ||
2328 | if (private_data && private_data_len) | |
2329 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2330 | } | |
2331 | ||
2332 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2333 | struct ib_sa_path_rec *alternate_path, | |
2334 | const void *private_data, | |
2335 | u8 private_data_len) | |
2336 | { | |
2337 | struct cm_id_private *cm_id_priv; | |
2338 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2339 | unsigned long flags; |
2340 | int ret; | |
2341 | ||
2342 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2343 | return -EINVAL; | |
2344 | ||
2345 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2346 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2347 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2348 | cm_id->lap_state != IB_CM_LAP_IDLE) { | |
2349 | ret = -EINVAL; | |
2350 | goto out; | |
2351 | } | |
2352 | ||
2353 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2354 | if (ret) | |
2355 | goto out; | |
2356 | ||
2357 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2358 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2359 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2360 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2361 | ||
34816ad9 | 2362 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2363 | if (ret) { |
2364 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2365 | cm_free_msg(msg); | |
2366 | return ret; | |
2367 | } | |
2368 | ||
2369 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2370 | cm_id_priv->msg = msg; | |
2371 | ||
2372 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2373 | return ret; | |
2374 | } | |
2375 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2376 | ||
2377 | static void cm_format_path_from_lap(struct ib_sa_path_rec *path, | |
2378 | struct cm_lap_msg *lap_msg) | |
2379 | { | |
2380 | memset(path, 0, sizeof *path); | |
2381 | path->dgid = lap_msg->alt_local_gid; | |
2382 | path->sgid = lap_msg->alt_remote_gid; | |
2383 | path->dlid = lap_msg->alt_local_lid; | |
2384 | path->slid = lap_msg->alt_remote_lid; | |
2385 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2386 | path->hop_limit = lap_msg->alt_hop_limit; | |
2387 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2388 | path->reversible = 1; | |
2389 | /* pkey is same as in REQ */ | |
2390 | path->sl = cm_lap_get_sl(lap_msg); | |
2391 | path->mtu_selector = IB_SA_EQ; | |
2392 | /* mtu is same as in REQ */ | |
2393 | path->rate_selector = IB_SA_EQ; | |
2394 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2395 | path->packet_life_time_selector = IB_SA_EQ; | |
2396 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2397 | path->packet_life_time -= (path->packet_life_time > 0); | |
2398 | } | |
2399 | ||
2400 | static int cm_lap_handler(struct cm_work *work) | |
2401 | { | |
2402 | struct cm_id_private *cm_id_priv; | |
2403 | struct cm_lap_msg *lap_msg; | |
2404 | struct ib_cm_lap_event_param *param; | |
2405 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2406 | unsigned long flags; |
2407 | int ret; | |
2408 | ||
2409 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2410 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2411 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2412 | lap_msg->local_comm_id); | |
2413 | if (!cm_id_priv) | |
2414 | return -EINVAL; | |
2415 | ||
2416 | param = &work->cm_event.param.lap_rcvd; | |
2417 | param->alternate_path = &work->path[0]; | |
2418 | cm_format_path_from_lap(param->alternate_path, lap_msg); | |
2419 | work->cm_event.private_data = &lap_msg->private_data; | |
2420 | ||
2421 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2422 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) | |
2423 | goto unlock; | |
2424 | ||
2425 | switch (cm_id_priv->id.lap_state) { | |
2426 | case IB_CM_LAP_IDLE: | |
2427 | break; | |
2428 | case IB_CM_MRA_LAP_SENT: | |
2429 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) | |
2430 | goto unlock; | |
2431 | ||
2432 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2433 | CM_MSG_RESPONSE_OTHER, | |
2434 | cm_id_priv->service_timeout, | |
2435 | cm_id_priv->private_data, | |
2436 | cm_id_priv->private_data_len); | |
2437 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2438 | ||
34816ad9 | 2439 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2440 | cm_free_msg(msg); |
2441 | goto deref; | |
2442 | default: | |
2443 | goto unlock; | |
2444 | } | |
2445 | ||
2446 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2447 | cm_id_priv->tid = lap_msg->hdr.tid; | |
2448 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2449 | if (!ret) | |
2450 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2451 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2452 | ||
2453 | if (ret) | |
2454 | cm_process_work(cm_id_priv, work); | |
2455 | else | |
2456 | cm_deref_id(cm_id_priv); | |
2457 | return 0; | |
2458 | ||
2459 | unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2460 | deref: cm_deref_id(cm_id_priv); | |
2461 | return -EINVAL; | |
2462 | } | |
2463 | ||
2464 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2465 | struct cm_id_private *cm_id_priv, | |
2466 | enum ib_cm_apr_status status, | |
2467 | void *info, | |
2468 | u8 info_length, | |
2469 | const void *private_data, | |
2470 | u8 private_data_len) | |
2471 | { | |
2472 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2473 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2474 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2475 | apr_msg->ap_status = (u8) status; | |
2476 | ||
2477 | if (info && info_length) { | |
2478 | apr_msg->info_length = info_length; | |
2479 | memcpy(apr_msg->info, info, info_length); | |
2480 | } | |
2481 | ||
2482 | if (private_data && private_data_len) | |
2483 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2484 | } | |
2485 | ||
2486 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2487 | enum ib_cm_apr_status status, | |
2488 | void *info, | |
2489 | u8 info_length, | |
2490 | const void *private_data, | |
2491 | u8 private_data_len) | |
2492 | { | |
2493 | struct cm_id_private *cm_id_priv; | |
2494 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2495 | unsigned long flags; |
2496 | int ret; | |
2497 | ||
2498 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2499 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2500 | return -EINVAL; | |
2501 | ||
2502 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2503 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2504 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2505 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2506 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2507 | ret = -EINVAL; | |
2508 | goto out; | |
2509 | } | |
2510 | ||
2511 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2512 | if (ret) | |
2513 | goto out; | |
2514 | ||
2515 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2516 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2517 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2518 | if (ret) { |
2519 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2520 | cm_free_msg(msg); | |
2521 | return ret; | |
2522 | } | |
2523 | ||
2524 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2525 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2526 | return ret; | |
2527 | } | |
2528 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2529 | ||
2530 | static int cm_apr_handler(struct cm_work *work) | |
2531 | { | |
2532 | struct cm_id_private *cm_id_priv; | |
2533 | struct cm_apr_msg *apr_msg; | |
2534 | unsigned long flags; | |
2535 | int ret; | |
2536 | ||
2537 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2538 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2539 | apr_msg->local_comm_id); | |
2540 | if (!cm_id_priv) | |
2541 | return -EINVAL; /* Unmatched reply. */ | |
2542 | ||
2543 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2544 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2545 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2546 | work->cm_event.private_data = &apr_msg->private_data; | |
2547 | ||
2548 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2549 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || | |
2550 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2551 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
2552 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2553 | goto out; | |
2554 | } | |
2555 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2556 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2557 | cm_id_priv->msg = NULL; |
2558 | ||
2559 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2560 | if (!ret) | |
2561 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2562 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2563 | ||
2564 | if (ret) | |
2565 | cm_process_work(cm_id_priv, work); | |
2566 | else | |
2567 | cm_deref_id(cm_id_priv); | |
2568 | return 0; | |
2569 | out: | |
2570 | cm_deref_id(cm_id_priv); | |
2571 | return -EINVAL; | |
2572 | } | |
2573 | ||
2574 | static int cm_timewait_handler(struct cm_work *work) | |
2575 | { | |
2576 | struct cm_timewait_info *timewait_info; | |
2577 | struct cm_id_private *cm_id_priv; | |
2578 | unsigned long flags; | |
2579 | int ret; | |
2580 | ||
2581 | timewait_info = (struct cm_timewait_info *)work; | |
2582 | cm_cleanup_timewait(timewait_info); | |
2583 | ||
2584 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2585 | timewait_info->work.remote_id); | |
2586 | if (!cm_id_priv) | |
2587 | return -EINVAL; | |
2588 | ||
2589 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2590 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || | |
2591 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
2592 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2593 | goto out; | |
2594 | } | |
2595 | cm_id_priv->id.state = IB_CM_IDLE; | |
2596 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2597 | if (!ret) | |
2598 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
2599 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2600 | ||
2601 | if (ret) | |
2602 | cm_process_work(cm_id_priv, work); | |
2603 | else | |
2604 | cm_deref_id(cm_id_priv); | |
2605 | return 0; | |
2606 | out: | |
2607 | cm_deref_id(cm_id_priv); | |
2608 | return -EINVAL; | |
2609 | } | |
2610 | ||
2611 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2612 | struct cm_id_private *cm_id_priv, | |
2613 | struct ib_cm_sidr_req_param *param) | |
2614 | { | |
2615 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2616 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2617 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
75af9088 | 2618 | sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
a977049d HR |
2619 | sidr_req_msg->service_id = param->service_id; |
2620 | ||
2621 | if (param->private_data && param->private_data_len) | |
2622 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2623 | param->private_data_len); | |
2624 | } | |
2625 | ||
2626 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2627 | struct ib_cm_sidr_req_param *param) | |
2628 | { | |
2629 | struct cm_id_private *cm_id_priv; | |
2630 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2631 | unsigned long flags; |
2632 | int ret; | |
2633 | ||
2634 | if (!param->path || (param->private_data && | |
2635 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2636 | return -EINVAL; | |
2637 | ||
2638 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2639 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2640 | if (ret) | |
2641 | goto out; | |
2642 | ||
2643 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2644 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2645 | cm_id_priv->timeout_ms = param->timeout_ms; |
2646 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2647 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2648 | if (ret) | |
2649 | goto out; | |
2650 | ||
2651 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2652 | param); | |
34816ad9 | 2653 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2654 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2655 | ||
2656 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2657 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2658 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2659 | else |
2660 | ret = -EINVAL; | |
2661 | ||
2662 | if (ret) { | |
2663 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2664 | cm_free_msg(msg); | |
2665 | goto out; | |
2666 | } | |
2667 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2668 | cm_id_priv->msg = msg; | |
2669 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2670 | out: | |
2671 | return ret; | |
2672 | } | |
2673 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2674 | ||
2675 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2676 | struct ib_cm_id *listen_id) | |
2677 | { | |
2678 | struct cm_sidr_req_msg *sidr_req_msg; | |
2679 | struct ib_cm_sidr_req_event_param *param; | |
2680 | ||
2681 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2682 | work->mad_recv_wc->recv_buf.mad; | |
2683 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2684 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2685 | param->listen_id = listen_id; |
a977049d HR |
2686 | param->port = work->port->port_num; |
2687 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2688 | } | |
2689 | ||
2690 | static int cm_sidr_req_handler(struct cm_work *work) | |
2691 | { | |
2692 | struct ib_cm_id *cm_id; | |
2693 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2694 | struct cm_sidr_req_msg *sidr_req_msg; | |
2695 | struct ib_wc *wc; | |
2696 | unsigned long flags; | |
2697 | ||
07d357d0 | 2698 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
2699 | if (IS_ERR(cm_id)) |
2700 | return PTR_ERR(cm_id); | |
2701 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2702 | ||
2703 | /* Record SGID/SLID and request ID for lookup. */ | |
2704 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2705 | work->mad_recv_wc->recv_buf.mad; | |
2706 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2707 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2708 | cm_id_priv->av.dgid.global.interface_id = 0; |
2709 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
2710 | &cm_id_priv->av); | |
2711 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
2712 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; | |
2713 | cm_id_priv->tid = sidr_req_msg->hdr.tid; | |
2714 | atomic_inc(&cm_id_priv->work_count); | |
2715 | ||
2716 | spin_lock_irqsave(&cm.lock, flags); | |
2717 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); | |
2718 | if (cur_cm_id_priv) { | |
2719 | spin_unlock_irqrestore(&cm.lock, flags); | |
2720 | goto out; /* Duplicate message. */ | |
2721 | } | |
07d357d0 | 2722 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
2723 | sidr_req_msg->service_id, |
2724 | sidr_req_msg->private_data); | |
a977049d HR |
2725 | if (!cur_cm_id_priv) { |
2726 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2727 | spin_unlock_irqrestore(&cm.lock, flags); | |
2728 | /* todo: reply with no match */ | |
2729 | goto out; /* No match. */ | |
2730 | } | |
2731 | atomic_inc(&cur_cm_id_priv->refcount); | |
2732 | spin_unlock_irqrestore(&cm.lock, flags); | |
2733 | ||
2734 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2735 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2736 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2737 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2738 | |
2739 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2740 | cm_process_work(cm_id_priv, work); | |
2741 | cm_deref_id(cur_cm_id_priv); | |
2742 | return 0; | |
2743 | out: | |
2744 | ib_destroy_cm_id(&cm_id_priv->id); | |
2745 | return -EINVAL; | |
2746 | } | |
2747 | ||
2748 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2749 | struct cm_id_private *cm_id_priv, | |
2750 | struct ib_cm_sidr_rep_param *param) | |
2751 | { | |
2752 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2753 | cm_id_priv->tid); | |
2754 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2755 | sidr_rep_msg->status = param->status; | |
2756 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2757 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2758 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2759 | ||
2760 | if (param->info && param->info_length) | |
2761 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2762 | ||
2763 | if (param->private_data && param->private_data_len) | |
2764 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2765 | param->private_data_len); | |
2766 | } | |
2767 | ||
2768 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
2769 | struct ib_cm_sidr_rep_param *param) | |
2770 | { | |
2771 | struct cm_id_private *cm_id_priv; | |
2772 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2773 | unsigned long flags; |
2774 | int ret; | |
2775 | ||
2776 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
2777 | (param->private_data && | |
2778 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
2779 | return -EINVAL; | |
2780 | ||
2781 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2782 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2783 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
2784 | ret = -EINVAL; | |
2785 | goto error; | |
2786 | } | |
2787 | ||
2788 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2789 | if (ret) | |
2790 | goto error; | |
2791 | ||
2792 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
2793 | param); | |
34816ad9 | 2794 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2795 | if (ret) { |
2796 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2797 | cm_free_msg(msg); | |
2798 | return ret; | |
2799 | } | |
2800 | cm_id->state = IB_CM_IDLE; | |
2801 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2802 | ||
2803 | spin_lock_irqsave(&cm.lock, flags); | |
2804 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2805 | spin_unlock_irqrestore(&cm.lock, flags); | |
2806 | return 0; | |
2807 | ||
2808 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2809 | return ret; | |
2810 | } | |
2811 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
2812 | ||
2813 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
2814 | { | |
2815 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2816 | struct ib_cm_sidr_rep_event_param *param; | |
2817 | ||
2818 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2819 | work->mad_recv_wc->recv_buf.mad; | |
2820 | param = &work->cm_event.param.sidr_rep_rcvd; | |
2821 | param->status = sidr_rep_msg->status; | |
2822 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
2823 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
2824 | param->info = &sidr_rep_msg->info; | |
2825 | param->info_len = sidr_rep_msg->info_length; | |
2826 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
2827 | } | |
2828 | ||
2829 | static int cm_sidr_rep_handler(struct cm_work *work) | |
2830 | { | |
2831 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
2832 | struct cm_id_private *cm_id_priv; | |
2833 | unsigned long flags; | |
2834 | ||
2835 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
2836 | work->mad_recv_wc->recv_buf.mad; | |
2837 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
2838 | if (!cm_id_priv) | |
2839 | return -EINVAL; /* Unmatched reply. */ | |
2840 | ||
2841 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2842 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { | |
2843 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2844 | goto out; | |
2845 | } | |
2846 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 2847 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2848 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
2849 | ||
2850 | cm_format_sidr_rep_event(work); | |
2851 | cm_process_work(cm_id_priv, work); | |
2852 | return 0; | |
2853 | out: | |
2854 | cm_deref_id(cm_id_priv); | |
2855 | return -EINVAL; | |
2856 | } | |
2857 | ||
2858 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
2859 | enum ib_wc_status wc_status) | |
2860 | { | |
2861 | struct cm_id_private *cm_id_priv; | |
2862 | struct ib_cm_event cm_event; | |
2863 | enum ib_cm_state state; | |
2864 | unsigned long flags; | |
2865 | int ret; | |
2866 | ||
2867 | memset(&cm_event, 0, sizeof cm_event); | |
2868 | cm_id_priv = msg->context[0]; | |
2869 | ||
2870 | /* Discard old sends or ones without a response. */ | |
2871 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2872 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; | |
2873 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
2874 | goto discard; | |
2875 | ||
2876 | switch (state) { | |
2877 | case IB_CM_REQ_SENT: | |
2878 | case IB_CM_MRA_REQ_RCVD: | |
2879 | cm_reset_to_idle(cm_id_priv); | |
2880 | cm_event.event = IB_CM_REQ_ERROR; | |
2881 | break; | |
2882 | case IB_CM_REP_SENT: | |
2883 | case IB_CM_MRA_REP_RCVD: | |
2884 | cm_reset_to_idle(cm_id_priv); | |
2885 | cm_event.event = IB_CM_REP_ERROR; | |
2886 | break; | |
2887 | case IB_CM_DREQ_SENT: | |
2888 | cm_enter_timewait(cm_id_priv); | |
2889 | cm_event.event = IB_CM_DREQ_ERROR; | |
2890 | break; | |
2891 | case IB_CM_SIDR_REQ_SENT: | |
2892 | cm_id_priv->id.state = IB_CM_IDLE; | |
2893 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
2894 | break; | |
2895 | default: | |
2896 | goto discard; | |
2897 | } | |
2898 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2899 | cm_event.param.send_status = wc_status; | |
2900 | ||
2901 | /* No other events can occur on the cm_id at this point. */ | |
2902 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
2903 | cm_free_msg(msg); | |
2904 | if (ret) | |
2905 | ib_destroy_cm_id(&cm_id_priv->id); | |
2906 | return; | |
2907 | discard: | |
2908 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2909 | cm_free_msg(msg); | |
2910 | } | |
2911 | ||
2912 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
2913 | struct ib_mad_send_wc *mad_send_wc) | |
2914 | { | |
34816ad9 | 2915 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
a977049d HR |
2916 | |
2917 | switch (mad_send_wc->status) { | |
2918 | case IB_WC_SUCCESS: | |
2919 | case IB_WC_WR_FLUSH_ERR: | |
2920 | cm_free_msg(msg); | |
2921 | break; | |
2922 | default: | |
2923 | if (msg->context[0] && msg->context[1]) | |
2924 | cm_process_send_error(msg, mad_send_wc->status); | |
2925 | else | |
2926 | cm_free_msg(msg); | |
2927 | break; | |
2928 | } | |
2929 | } | |
2930 | ||
2931 | static void cm_work_handler(void *data) | |
2932 | { | |
2933 | struct cm_work *work = data; | |
2934 | int ret; | |
2935 | ||
2936 | switch (work->cm_event.event) { | |
2937 | case IB_CM_REQ_RECEIVED: | |
2938 | ret = cm_req_handler(work); | |
2939 | break; | |
2940 | case IB_CM_MRA_RECEIVED: | |
2941 | ret = cm_mra_handler(work); | |
2942 | break; | |
2943 | case IB_CM_REJ_RECEIVED: | |
2944 | ret = cm_rej_handler(work); | |
2945 | break; | |
2946 | case IB_CM_REP_RECEIVED: | |
2947 | ret = cm_rep_handler(work); | |
2948 | break; | |
2949 | case IB_CM_RTU_RECEIVED: | |
2950 | ret = cm_rtu_handler(work); | |
2951 | break; | |
2952 | case IB_CM_USER_ESTABLISHED: | |
2953 | ret = cm_establish_handler(work); | |
2954 | break; | |
2955 | case IB_CM_DREQ_RECEIVED: | |
2956 | ret = cm_dreq_handler(work); | |
2957 | break; | |
2958 | case IB_CM_DREP_RECEIVED: | |
2959 | ret = cm_drep_handler(work); | |
2960 | break; | |
2961 | case IB_CM_SIDR_REQ_RECEIVED: | |
2962 | ret = cm_sidr_req_handler(work); | |
2963 | break; | |
2964 | case IB_CM_SIDR_REP_RECEIVED: | |
2965 | ret = cm_sidr_rep_handler(work); | |
2966 | break; | |
2967 | case IB_CM_LAP_RECEIVED: | |
2968 | ret = cm_lap_handler(work); | |
2969 | break; | |
2970 | case IB_CM_APR_RECEIVED: | |
2971 | ret = cm_apr_handler(work); | |
2972 | break; | |
2973 | case IB_CM_TIMEWAIT_EXIT: | |
2974 | ret = cm_timewait_handler(work); | |
2975 | break; | |
2976 | default: | |
2977 | ret = -EINVAL; | |
2978 | break; | |
2979 | } | |
2980 | if (ret) | |
2981 | cm_free_work(work); | |
2982 | } | |
2983 | ||
2984 | int ib_cm_establish(struct ib_cm_id *cm_id) | |
2985 | { | |
2986 | struct cm_id_private *cm_id_priv; | |
2987 | struct cm_work *work; | |
2988 | unsigned long flags; | |
2989 | int ret = 0; | |
2990 | ||
2991 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
2992 | if (!work) | |
2993 | return -ENOMEM; | |
2994 | ||
2995 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2996 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2997 | switch (cm_id->state) | |
2998 | { | |
2999 | case IB_CM_REP_SENT: | |
3000 | case IB_CM_MRA_REP_RCVD: | |
3001 | cm_id->state = IB_CM_ESTABLISHED; | |
3002 | break; | |
3003 | case IB_CM_ESTABLISHED: | |
3004 | ret = -EISCONN; | |
3005 | break; | |
3006 | default: | |
3007 | ret = -EINVAL; | |
3008 | break; | |
3009 | } | |
3010 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3011 | ||
3012 | if (ret) { | |
3013 | kfree(work); | |
3014 | goto out; | |
3015 | } | |
3016 | ||
3017 | /* | |
3018 | * The CM worker thread may try to destroy the cm_id before it | |
3019 | * can execute this work item. To prevent potential deadlock, | |
3020 | * we need to find the cm_id once we're in the context of the | |
3021 | * worker thread, rather than holding a reference on it. | |
3022 | */ | |
3023 | INIT_WORK(&work->work, cm_work_handler, work); | |
3024 | work->local_id = cm_id->local_id; | |
3025 | work->remote_id = cm_id->remote_id; | |
3026 | work->mad_recv_wc = NULL; | |
3027 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
3028 | queue_work(cm.wq, &work->work); | |
3029 | out: | |
3030 | return ret; | |
3031 | } | |
3032 | EXPORT_SYMBOL(ib_cm_establish); | |
3033 | ||
3034 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3035 | struct ib_mad_recv_wc *mad_recv_wc) | |
3036 | { | |
3037 | struct cm_work *work; | |
3038 | enum ib_cm_event_type event; | |
3039 | int paths = 0; | |
3040 | ||
3041 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3042 | case CM_REQ_ATTR_ID: | |
3043 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3044 | alt_local_lid != 0); | |
3045 | event = IB_CM_REQ_RECEIVED; | |
3046 | break; | |
3047 | case CM_MRA_ATTR_ID: | |
3048 | event = IB_CM_MRA_RECEIVED; | |
3049 | break; | |
3050 | case CM_REJ_ATTR_ID: | |
3051 | event = IB_CM_REJ_RECEIVED; | |
3052 | break; | |
3053 | case CM_REP_ATTR_ID: | |
3054 | event = IB_CM_REP_RECEIVED; | |
3055 | break; | |
3056 | case CM_RTU_ATTR_ID: | |
3057 | event = IB_CM_RTU_RECEIVED; | |
3058 | break; | |
3059 | case CM_DREQ_ATTR_ID: | |
3060 | event = IB_CM_DREQ_RECEIVED; | |
3061 | break; | |
3062 | case CM_DREP_ATTR_ID: | |
3063 | event = IB_CM_DREP_RECEIVED; | |
3064 | break; | |
3065 | case CM_SIDR_REQ_ATTR_ID: | |
3066 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3067 | break; | |
3068 | case CM_SIDR_REP_ATTR_ID: | |
3069 | event = IB_CM_SIDR_REP_RECEIVED; | |
3070 | break; | |
3071 | case CM_LAP_ATTR_ID: | |
3072 | paths = 1; | |
3073 | event = IB_CM_LAP_RECEIVED; | |
3074 | break; | |
3075 | case CM_APR_ATTR_ID: | |
3076 | event = IB_CM_APR_RECEIVED; | |
3077 | break; | |
3078 | default: | |
3079 | ib_free_recv_mad(mad_recv_wc); | |
3080 | return; | |
3081 | } | |
3082 | ||
3083 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, | |
3084 | GFP_KERNEL); | |
3085 | if (!work) { | |
3086 | ib_free_recv_mad(mad_recv_wc); | |
3087 | return; | |
3088 | } | |
3089 | ||
3090 | INIT_WORK(&work->work, cm_work_handler, work); | |
3091 | work->cm_event.event = event; | |
3092 | work->mad_recv_wc = mad_recv_wc; | |
3093 | work->port = (struct cm_port *)mad_agent->context; | |
3094 | queue_work(cm.wq, &work->work); | |
3095 | } | |
3096 | ||
3097 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3098 | struct ib_qp_attr *qp_attr, | |
3099 | int *qp_attr_mask) | |
3100 | { | |
3101 | unsigned long flags; | |
3102 | int ret; | |
3103 | ||
3104 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3105 | switch (cm_id_priv->id.state) { | |
3106 | case IB_CM_REQ_SENT: | |
3107 | case IB_CM_MRA_REQ_RCVD: | |
3108 | case IB_CM_REQ_RCVD: | |
3109 | case IB_CM_MRA_REQ_SENT: | |
3110 | case IB_CM_REP_RCVD: | |
3111 | case IB_CM_MRA_REP_SENT: | |
3112 | case IB_CM_REP_SENT: | |
3113 | case IB_CM_MRA_REP_RCVD: | |
3114 | case IB_CM_ESTABLISHED: | |
3115 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3116 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
ae7971a7 SH |
3117 | qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE | |
3118 | IB_ACCESS_REMOTE_WRITE; | |
a977049d | 3119 | if (cm_id_priv->responder_resources) |
ae7971a7 | 3120 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ; |
a977049d HR |
3121 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3122 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3123 | ret = 0; | |
3124 | break; | |
3125 | default: | |
3126 | ret = -EINVAL; | |
3127 | break; | |
3128 | } | |
3129 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3130 | return ret; | |
3131 | } | |
3132 | ||
3133 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3134 | struct ib_qp_attr *qp_attr, | |
3135 | int *qp_attr_mask) | |
3136 | { | |
3137 | unsigned long flags; | |
3138 | int ret; | |
3139 | ||
3140 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3141 | switch (cm_id_priv->id.state) { | |
3142 | case IB_CM_REQ_RCVD: | |
3143 | case IB_CM_MRA_REQ_SENT: | |
3144 | case IB_CM_REP_RCVD: | |
3145 | case IB_CM_MRA_REP_SENT: | |
3146 | case IB_CM_REP_SENT: | |
3147 | case IB_CM_MRA_REP_RCVD: | |
3148 | case IB_CM_ESTABLISHED: | |
3149 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3150 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3151 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3152 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3153 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3154 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
ae7971a7 SH |
3155 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3156 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | | |
3157 | IB_QP_MIN_RNR_TIMER; | |
3158 | qp_attr->max_dest_rd_atomic = | |
3159 | cm_id_priv->responder_resources; | |
3160 | qp_attr->min_rnr_timer = 0; | |
3161 | } | |
a977049d HR |
3162 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3163 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
3164 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; | |
3165 | } | |
3166 | ret = 0; | |
3167 | break; | |
3168 | default: | |
3169 | ret = -EINVAL; | |
3170 | break; | |
3171 | } | |
3172 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3173 | return ret; | |
3174 | } | |
3175 | ||
3176 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3177 | struct ib_qp_attr *qp_attr, | |
3178 | int *qp_attr_mask) | |
3179 | { | |
3180 | unsigned long flags; | |
3181 | int ret; | |
3182 | ||
3183 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3184 | switch (cm_id_priv->id.state) { | |
3185 | case IB_CM_REP_RCVD: | |
3186 | case IB_CM_MRA_REP_SENT: | |
3187 | case IB_CM_REP_SENT: | |
3188 | case IB_CM_MRA_REP_RCVD: | |
3189 | case IB_CM_ESTABLISHED: | |
ae7971a7 | 3190 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; |
a977049d | 3191 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); |
ae7971a7 SH |
3192 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3193 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3194 | IB_QP_RNR_RETRY | | |
3195 | IB_QP_MAX_QP_RD_ATOMIC; | |
3196 | qp_attr->timeout = cm_id_priv->local_ack_timeout; | |
3197 | qp_attr->retry_cnt = cm_id_priv->retry_count; | |
3198 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3199 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; | |
3200 | } | |
a977049d HR |
3201 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3202 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3203 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3204 | } | |
3205 | ret = 0; | |
3206 | break; | |
3207 | default: | |
3208 | ret = -EINVAL; | |
3209 | break; | |
3210 | } | |
3211 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3212 | return ret; | |
3213 | } | |
3214 | ||
3215 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3216 | struct ib_qp_attr *qp_attr, | |
3217 | int *qp_attr_mask) | |
3218 | { | |
3219 | struct cm_id_private *cm_id_priv; | |
3220 | int ret; | |
3221 | ||
3222 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3223 | switch (qp_attr->qp_state) { | |
3224 | case IB_QPS_INIT: | |
3225 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3226 | break; | |
3227 | case IB_QPS_RTR: | |
3228 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3229 | break; | |
3230 | case IB_QPS_RTS: | |
3231 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3232 | break; | |
3233 | default: | |
3234 | ret = -EINVAL; | |
3235 | break; | |
3236 | } | |
3237 | return ret; | |
3238 | } | |
3239 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3240 | ||
a977049d HR |
3241 | static void cm_add_one(struct ib_device *device) |
3242 | { | |
3243 | struct cm_device *cm_dev; | |
3244 | struct cm_port *port; | |
3245 | struct ib_mad_reg_req reg_req = { | |
3246 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3247 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3248 | }; | |
3249 | struct ib_port_modify port_modify = { | |
3250 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3251 | }; | |
3252 | unsigned long flags; | |
3253 | int ret; | |
3254 | u8 i; | |
3255 | ||
3256 | cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * | |
3257 | device->phys_port_cnt, GFP_KERNEL); | |
3258 | if (!cm_dev) | |
3259 | return; | |
3260 | ||
3261 | cm_dev->device = device; | |
cf311cd4 | 3262 | cm_dev->ca_guid = device->node_guid; |
a977049d HR |
3263 | |
3264 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); | |
3265 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3266 | port = &cm_dev->port[i-1]; | |
3267 | port->cm_dev = cm_dev; | |
3268 | port->port_num = i; | |
3269 | port->mad_agent = ib_register_mad_agent(device, i, | |
3270 | IB_QPT_GSI, | |
3271 | ®_req, | |
3272 | 0, | |
3273 | cm_send_handler, | |
3274 | cm_recv_handler, | |
3275 | port); | |
3276 | if (IS_ERR(port->mad_agent)) | |
cf311cd4 | 3277 | goto error1; |
a977049d HR |
3278 | |
3279 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3280 | if (ret) | |
cf311cd4 | 3281 | goto error2; |
a977049d HR |
3282 | } |
3283 | ib_set_client_data(device, &cm_client, cm_dev); | |
3284 | ||
3285 | write_lock_irqsave(&cm.device_lock, flags); | |
3286 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3287 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3288 | return; | |
3289 | ||
a977049d | 3290 | error2: |
cf311cd4 SH |
3291 | ib_unregister_mad_agent(port->mad_agent); |
3292 | error1: | |
a977049d HR |
3293 | port_modify.set_port_cap_mask = 0; |
3294 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3295 | while (--i) { | |
3296 | port = &cm_dev->port[i-1]; | |
3297 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3298 | ib_unregister_mad_agent(port->mad_agent); | |
3299 | } | |
a977049d HR |
3300 | kfree(cm_dev); |
3301 | } | |
3302 | ||
3303 | static void cm_remove_one(struct ib_device *device) | |
3304 | { | |
3305 | struct cm_device *cm_dev; | |
3306 | struct cm_port *port; | |
3307 | struct ib_port_modify port_modify = { | |
3308 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3309 | }; | |
3310 | unsigned long flags; | |
3311 | int i; | |
3312 | ||
3313 | cm_dev = ib_get_client_data(device, &cm_client); | |
3314 | if (!cm_dev) | |
3315 | return; | |
3316 | ||
3317 | write_lock_irqsave(&cm.device_lock, flags); | |
3318 | list_del(&cm_dev->list); | |
3319 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3320 | ||
3321 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
3322 | port = &cm_dev->port[i-1]; | |
3323 | ib_modify_port(device, port->port_num, 0, &port_modify); | |
3324 | ib_unregister_mad_agent(port->mad_agent); | |
3325 | } | |
3326 | kfree(cm_dev); | |
3327 | } | |
3328 | ||
3329 | static int __init ib_cm_init(void) | |
3330 | { | |
3331 | int ret; | |
3332 | ||
3333 | memset(&cm, 0, sizeof cm); | |
3334 | INIT_LIST_HEAD(&cm.device_list); | |
3335 | rwlock_init(&cm.device_lock); | |
3336 | spin_lock_init(&cm.lock); | |
3337 | cm.listen_service_table = RB_ROOT; | |
3338 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3339 | cm.remote_id_table = RB_ROOT; | |
3340 | cm.remote_qp_table = RB_ROOT; | |
3341 | cm.remote_sidr_table = RB_ROOT; | |
3342 | idr_init(&cm.local_id_table); | |
3343 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); | |
3344 | ||
3345 | cm.wq = create_workqueue("ib_cm"); | |
3346 | if (!cm.wq) | |
3347 | return -ENOMEM; | |
3348 | ||
3349 | ret = ib_register_client(&cm_client); | |
3350 | if (ret) | |
3351 | goto error; | |
3352 | ||
3353 | return 0; | |
3354 | error: | |
3355 | destroy_workqueue(cm.wq); | |
3356 | return ret; | |
3357 | } | |
3358 | ||
3359 | static void __exit ib_cm_cleanup(void) | |
3360 | { | |
a977049d HR |
3361 | destroy_workqueue(cm.wq); |
3362 | ib_unregister_client(&cm_client); | |
5d7edb3c | 3363 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3364 | } |
3365 | ||
3366 | module_init(ib_cm_init); | |
3367 | module_exit(ib_cm_cleanup); | |
3368 |