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a977049d | 1 | /* |
9af57b7a | 2 | * Copyright (c) 2004-2007 Intel Corporation. All rights reserved. |
a977049d HR |
3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. | |
5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
6 | * | |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
34 | * | |
6e61d04f | 35 | * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $ |
a977049d | 36 | */ |
1b52fa98 SH |
37 | |
38 | #include <linux/completion.h> | |
a977049d | 39 | #include <linux/dma-mapping.h> |
9af57b7a | 40 | #include <linux/device.h> |
a977049d HR |
41 | #include <linux/err.h> |
42 | #include <linux/idr.h> | |
43 | #include <linux/interrupt.h> | |
f06d2653 | 44 | #include <linux/random.h> |
a977049d HR |
45 | #include <linux/rbtree.h> |
46 | #include <linux/spinlock.h> | |
9af57b7a | 47 | #include <linux/sysfs.h> |
a977049d HR |
48 | #include <linux/workqueue.h> |
49 | ||
a4d61e84 RD |
50 | #include <rdma/ib_cache.h> |
51 | #include <rdma/ib_cm.h> | |
a977049d HR |
52 | #include "cm_msgs.h" |
53 | ||
54 | MODULE_AUTHOR("Sean Hefty"); | |
55 | MODULE_DESCRIPTION("InfiniBand CM"); | |
56 | MODULE_LICENSE("Dual BSD/GPL"); | |
57 | ||
58 | static void cm_add_one(struct ib_device *device); | |
59 | static void cm_remove_one(struct ib_device *device); | |
60 | ||
61 | static struct ib_client cm_client = { | |
62 | .name = "cm", | |
63 | .add = cm_add_one, | |
64 | .remove = cm_remove_one | |
65 | }; | |
66 | ||
67 | static struct ib_cm { | |
68 | spinlock_t lock; | |
69 | struct list_head device_list; | |
70 | rwlock_t device_lock; | |
71 | struct rb_root listen_service_table; | |
72 | u64 listen_service_id; | |
73 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
74 | struct rb_root remote_qp_table; | |
75 | struct rb_root remote_id_table; | |
76 | struct rb_root remote_sidr_table; | |
77 | struct idr local_id_table; | |
f06d2653 | 78 | __be32 random_id_operand; |
8575329d | 79 | struct list_head timewait_list; |
a977049d HR |
80 | struct workqueue_struct *wq; |
81 | } cm; | |
82 | ||
9af57b7a SH |
83 | /* Counter indexes ordered by attribute ID */ |
84 | enum { | |
85 | CM_REQ_COUNTER, | |
86 | CM_MRA_COUNTER, | |
87 | CM_REJ_COUNTER, | |
88 | CM_REP_COUNTER, | |
89 | CM_RTU_COUNTER, | |
90 | CM_DREQ_COUNTER, | |
91 | CM_DREP_COUNTER, | |
92 | CM_SIDR_REQ_COUNTER, | |
93 | CM_SIDR_REP_COUNTER, | |
94 | CM_LAP_COUNTER, | |
95 | CM_APR_COUNTER, | |
96 | CM_ATTR_COUNT, | |
97 | CM_ATTR_ID_OFFSET = 0x0010, | |
98 | }; | |
99 | ||
100 | enum { | |
101 | CM_XMIT, | |
102 | CM_XMIT_RETRIES, | |
103 | CM_RECV, | |
104 | CM_RECV_DUPLICATES, | |
105 | CM_COUNTER_GROUPS | |
106 | }; | |
107 | ||
108 | static char const counter_group_names[CM_COUNTER_GROUPS] | |
109 | [sizeof("cm_rx_duplicates")] = { | |
110 | "cm_tx_msgs", "cm_tx_retries", | |
111 | "cm_rx_msgs", "cm_rx_duplicates" | |
112 | }; | |
113 | ||
114 | struct cm_counter_group { | |
115 | struct kobject obj; | |
116 | atomic_long_t counter[CM_ATTR_COUNT]; | |
117 | }; | |
118 | ||
119 | struct cm_counter_attribute { | |
120 | struct attribute attr; | |
121 | int index; | |
122 | }; | |
123 | ||
124 | #define CM_COUNTER_ATTR(_name, _index) \ | |
125 | struct cm_counter_attribute cm_##_name##_counter_attr = { \ | |
126 | .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \ | |
127 | .index = _index \ | |
128 | } | |
129 | ||
130 | static CM_COUNTER_ATTR(req, CM_REQ_COUNTER); | |
131 | static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER); | |
132 | static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER); | |
133 | static CM_COUNTER_ATTR(rep, CM_REP_COUNTER); | |
134 | static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER); | |
135 | static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER); | |
136 | static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER); | |
137 | static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER); | |
138 | static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER); | |
139 | static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER); | |
140 | static CM_COUNTER_ATTR(apr, CM_APR_COUNTER); | |
141 | ||
142 | static struct attribute *cm_counter_default_attrs[] = { | |
143 | &cm_req_counter_attr.attr, | |
144 | &cm_mra_counter_attr.attr, | |
145 | &cm_rej_counter_attr.attr, | |
146 | &cm_rep_counter_attr.attr, | |
147 | &cm_rtu_counter_attr.attr, | |
148 | &cm_dreq_counter_attr.attr, | |
149 | &cm_drep_counter_attr.attr, | |
150 | &cm_sidr_req_counter_attr.attr, | |
151 | &cm_sidr_rep_counter_attr.attr, | |
152 | &cm_lap_counter_attr.attr, | |
153 | &cm_apr_counter_attr.attr, | |
154 | NULL | |
155 | }; | |
156 | ||
a977049d HR |
157 | struct cm_port { |
158 | struct cm_device *cm_dev; | |
159 | struct ib_mad_agent *mad_agent; | |
9af57b7a | 160 | struct kobject port_obj; |
a977049d | 161 | u8 port_num; |
9af57b7a | 162 | struct cm_counter_group counter_group[CM_COUNTER_GROUPS]; |
a977049d HR |
163 | }; |
164 | ||
165 | struct cm_device { | |
166 | struct list_head list; | |
167 | struct ib_device *device; | |
9af57b7a | 168 | struct kobject dev_obj; |
1d846126 | 169 | u8 ack_delay; |
9af57b7a | 170 | struct cm_port *port[0]; |
a977049d HR |
171 | }; |
172 | ||
173 | struct cm_av { | |
174 | struct cm_port *port; | |
175 | union ib_gid dgid; | |
176 | struct ib_ah_attr ah_attr; | |
177 | u16 pkey_index; | |
1d846126 | 178 | u8 timeout; |
a977049d HR |
179 | }; |
180 | ||
181 | struct cm_work { | |
c4028958 | 182 | struct delayed_work work; |
a977049d HR |
183 | struct list_head list; |
184 | struct cm_port *port; | |
185 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
186 | __be32 local_id; /* Established / timewait */ |
187 | __be32 remote_id; | |
a977049d HR |
188 | struct ib_cm_event cm_event; |
189 | struct ib_sa_path_rec path[0]; | |
190 | }; | |
191 | ||
192 | struct cm_timewait_info { | |
193 | struct cm_work work; /* Must be first. */ | |
8575329d | 194 | struct list_head list; |
a977049d HR |
195 | struct rb_node remote_qp_node; |
196 | struct rb_node remote_id_node; | |
97f52eb4 SH |
197 | __be64 remote_ca_guid; |
198 | __be32 remote_qpn; | |
a977049d HR |
199 | u8 inserted_remote_qp; |
200 | u8 inserted_remote_id; | |
201 | }; | |
202 | ||
203 | struct cm_id_private { | |
204 | struct ib_cm_id id; | |
205 | ||
206 | struct rb_node service_node; | |
207 | struct rb_node sidr_id_node; | |
87fd1a11 | 208 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 209 | struct completion comp; |
a977049d HR |
210 | atomic_t refcount; |
211 | ||
212 | struct ib_mad_send_buf *msg; | |
213 | struct cm_timewait_info *timewait_info; | |
214 | /* todo: use alternate port on send failure */ | |
215 | struct cm_av av; | |
216 | struct cm_av alt_av; | |
6e61d04f | 217 | struct ib_cm_compare_data *compare_data; |
a977049d HR |
218 | |
219 | void *private_data; | |
97f52eb4 SH |
220 | __be64 tid; |
221 | __be32 local_qpn; | |
222 | __be32 remote_qpn; | |
ae7971a7 | 223 | enum ib_qp_type qp_type; |
97f52eb4 SH |
224 | __be32 sq_psn; |
225 | __be32 rq_psn; | |
a977049d HR |
226 | int timeout_ms; |
227 | enum ib_mtu path_mtu; | |
e1444b5a | 228 | __be16 pkey; |
a977049d HR |
229 | u8 private_data_len; |
230 | u8 max_cm_retries; | |
231 | u8 peer_to_peer; | |
232 | u8 responder_resources; | |
233 | u8 initiator_depth; | |
a977049d HR |
234 | u8 retry_count; |
235 | u8 rnr_retry_count; | |
236 | u8 service_timeout; | |
1d846126 | 237 | u8 target_ack_delay; |
a977049d HR |
238 | |
239 | struct list_head work_list; | |
240 | atomic_t work_count; | |
241 | }; | |
242 | ||
c4028958 | 243 | static void cm_work_handler(struct work_struct *work); |
a977049d HR |
244 | |
245 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
246 | { | |
247 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 248 | complete(&cm_id_priv->comp); |
a977049d HR |
249 | } |
250 | ||
251 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
252 | struct ib_mad_send_buf **msg) | |
253 | { | |
254 | struct ib_mad_agent *mad_agent; | |
255 | struct ib_mad_send_buf *m; | |
256 | struct ib_ah *ah; | |
257 | ||
258 | mad_agent = cm_id_priv->av.port->mad_agent; | |
259 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
260 | if (IS_ERR(ah)) | |
261 | return PTR_ERR(ah); | |
262 | ||
3cd96564 | 263 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
354ba39c | 264 | cm_id_priv->av.pkey_index, |
34816ad9 | 265 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
266 | GFP_ATOMIC); |
267 | if (IS_ERR(m)) { | |
268 | ib_destroy_ah(ah); | |
269 | return PTR_ERR(m); | |
270 | } | |
271 | ||
272 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
273 | m->ah = ah; |
274 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
275 | |
276 | atomic_inc(&cm_id_priv->refcount); | |
277 | m->context[0] = cm_id_priv; | |
278 | *msg = m; | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static int cm_alloc_response_msg(struct cm_port *port, | |
283 | struct ib_mad_recv_wc *mad_recv_wc, | |
284 | struct ib_mad_send_buf **msg) | |
285 | { | |
286 | struct ib_mad_send_buf *m; | |
287 | struct ib_ah *ah; | |
288 | ||
289 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
290 | mad_recv_wc->recv_buf.grh, port->port_num); | |
291 | if (IS_ERR(ah)) | |
292 | return PTR_ERR(ah); | |
293 | ||
294 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 295 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
296 | GFP_ATOMIC); |
297 | if (IS_ERR(m)) { | |
298 | ib_destroy_ah(ah); | |
299 | return PTR_ERR(m); | |
300 | } | |
34816ad9 | 301 | m->ah = ah; |
a977049d HR |
302 | *msg = m; |
303 | return 0; | |
304 | } | |
305 | ||
306 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
307 | { | |
34816ad9 | 308 | ib_destroy_ah(msg->ah); |
a977049d HR |
309 | if (msg->context[0]) |
310 | cm_deref_id(msg->context[0]); | |
311 | ib_free_send_mad(msg); | |
312 | } | |
313 | ||
314 | static void * cm_copy_private_data(const void *private_data, | |
315 | u8 private_data_len) | |
316 | { | |
317 | void *data; | |
318 | ||
319 | if (!private_data || !private_data_len) | |
320 | return NULL; | |
321 | ||
bed8bdfd | 322 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
a977049d HR |
323 | if (!data) |
324 | return ERR_PTR(-ENOMEM); | |
325 | ||
a977049d HR |
326 | return data; |
327 | } | |
328 | ||
329 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
330 | void *private_data, u8 private_data_len) | |
331 | { | |
332 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
333 | kfree(cm_id_priv->private_data); | |
334 | ||
335 | cm_id_priv->private_data = private_data; | |
336 | cm_id_priv->private_data_len = private_data_len; | |
337 | } | |
338 | ||
ca222c6b SH |
339 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
340 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
341 | { |
342 | av->port = port; | |
343 | av->pkey_index = wc->pkey_index; | |
ca222c6b SH |
344 | ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc, |
345 | grh, &av->ah_attr); | |
a977049d HR |
346 | } |
347 | ||
348 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
349 | { | |
350 | struct cm_device *cm_dev; | |
351 | struct cm_port *port = NULL; | |
352 | unsigned long flags; | |
353 | int ret; | |
354 | u8 p; | |
355 | ||
356 | read_lock_irqsave(&cm.device_lock, flags); | |
357 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
358 | if (!ib_find_cached_gid(cm_dev->device, &path->sgid, | |
359 | &p, NULL)) { | |
9af57b7a | 360 | port = cm_dev->port[p-1]; |
a977049d HR |
361 | break; |
362 | } | |
363 | } | |
364 | read_unlock_irqrestore(&cm.device_lock, flags); | |
365 | ||
366 | if (!port) | |
367 | return -EINVAL; | |
368 | ||
369 | ret = ib_find_cached_pkey(cm_dev->device, port->port_num, | |
370 | be16_to_cpu(path->pkey), &av->pkey_index); | |
371 | if (ret) | |
372 | return ret; | |
373 | ||
374 | av->port = port; | |
ca222c6b SH |
375 | ib_init_ah_from_path(cm_dev->device, port->port_num, path, |
376 | &av->ah_attr); | |
1d846126 | 377 | av->timeout = path->packet_life_time + 1; |
a977049d HR |
378 | return 0; |
379 | } | |
380 | ||
381 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
382 | { | |
383 | unsigned long flags; | |
f06d2653 | 384 | int ret, id; |
de1bb1a6 | 385 | static int next_id; |
a977049d HR |
386 | |
387 | do { | |
388 | spin_lock_irqsave(&cm.lock, flags); | |
f06d2653 | 389 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
9f81036c MT |
390 | next_id, &id); |
391 | if (!ret) | |
392 | next_id = ((unsigned) id + 1) & MAX_ID_MASK; | |
a977049d HR |
393 | spin_unlock_irqrestore(&cm.lock, flags); |
394 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
f06d2653 SH |
395 | |
396 | cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand); | |
a977049d HR |
397 | return ret; |
398 | } | |
399 | ||
97f52eb4 | 400 | static void cm_free_id(__be32 local_id) |
a977049d | 401 | { |
24be6e81 | 402 | spin_lock_irq(&cm.lock); |
f06d2653 SH |
403 | idr_remove(&cm.local_id_table, |
404 | (__force int) (local_id ^ cm.random_id_operand)); | |
24be6e81 | 405 | spin_unlock_irq(&cm.lock); |
a977049d HR |
406 | } |
407 | ||
97f52eb4 | 408 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
409 | { |
410 | struct cm_id_private *cm_id_priv; | |
411 | ||
f06d2653 SH |
412 | cm_id_priv = idr_find(&cm.local_id_table, |
413 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
414 | if (cm_id_priv) { |
415 | if (cm_id_priv->id.remote_id == remote_id) | |
416 | atomic_inc(&cm_id_priv->refcount); | |
417 | else | |
418 | cm_id_priv = NULL; | |
419 | } | |
420 | ||
421 | return cm_id_priv; | |
422 | } | |
423 | ||
97f52eb4 | 424 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
425 | { |
426 | struct cm_id_private *cm_id_priv; | |
a977049d | 427 | |
24be6e81 | 428 | spin_lock_irq(&cm.lock); |
a977049d | 429 | cm_id_priv = cm_get_id(local_id, remote_id); |
24be6e81 | 430 | spin_unlock_irq(&cm.lock); |
a977049d HR |
431 | |
432 | return cm_id_priv; | |
433 | } | |
434 | ||
6e61d04f SH |
435 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
436 | { | |
437 | int i; | |
438 | ||
439 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) | |
440 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & | |
441 | ((unsigned long *) mask)[i]; | |
442 | } | |
443 | ||
444 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
445 | struct ib_cm_compare_data *dst_data) | |
446 | { | |
447 | u8 src[IB_CM_COMPARE_SIZE]; | |
448 | u8 dst[IB_CM_COMPARE_SIZE]; | |
449 | ||
450 | if (!src_data || !dst_data) | |
451 | return 0; | |
452 | ||
453 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
454 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
455 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); | |
456 | } | |
457 | ||
458 | static int cm_compare_private_data(u8 *private_data, | |
459 | struct ib_cm_compare_data *dst_data) | |
460 | { | |
461 | u8 src[IB_CM_COMPARE_SIZE]; | |
462 | ||
463 | if (!dst_data) | |
464 | return 0; | |
465 | ||
466 | cm_mask_copy(src, private_data, dst_data->mask); | |
467 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); | |
468 | } | |
469 | ||
a977049d HR |
470 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
471 | { | |
472 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
473 | struct rb_node *parent = NULL; | |
474 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
475 | __be64 service_id = cm_id_priv->id.service_id; |
476 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 477 | int data_cmp; |
a977049d HR |
478 | |
479 | while (*link) { | |
480 | parent = *link; | |
481 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
482 | service_node); | |
6e61d04f SH |
483 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
484 | cur_cm_id_priv->compare_data); | |
a977049d | 485 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 486 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
487 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
488 | !data_cmp) | |
07d357d0 SH |
489 | return cur_cm_id_priv; |
490 | ||
491 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
492 | link = &(*link)->rb_left; | |
493 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
494 | link = &(*link)->rb_right; | |
495 | else if (service_id < cur_cm_id_priv->id.service_id) | |
a977049d | 496 | link = &(*link)->rb_left; |
6e61d04f SH |
497 | else if (service_id > cur_cm_id_priv->id.service_id) |
498 | link = &(*link)->rb_right; | |
499 | else if (data_cmp < 0) | |
500 | link = &(*link)->rb_left; | |
a977049d HR |
501 | else |
502 | link = &(*link)->rb_right; | |
503 | } | |
504 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
505 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
506 | return NULL; | |
507 | } | |
508 | ||
07d357d0 | 509 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f SH |
510 | __be64 service_id, |
511 | u8 *private_data) | |
a977049d HR |
512 | { |
513 | struct rb_node *node = cm.listen_service_table.rb_node; | |
514 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 515 | int data_cmp; |
a977049d HR |
516 | |
517 | while (node) { | |
518 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
519 | data_cmp = cm_compare_private_data(private_data, |
520 | cm_id_priv->compare_data); | |
a977049d | 521 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 522 | cm_id_priv->id.service_id && |
6e61d04f | 523 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 524 | return cm_id_priv; |
07d357d0 SH |
525 | |
526 | if (device < cm_id_priv->id.device) | |
527 | node = node->rb_left; | |
528 | else if (device > cm_id_priv->id.device) | |
529 | node = node->rb_right; | |
530 | else if (service_id < cm_id_priv->id.service_id) | |
a977049d | 531 | node = node->rb_left; |
6e61d04f SH |
532 | else if (service_id > cm_id_priv->id.service_id) |
533 | node = node->rb_right; | |
534 | else if (data_cmp < 0) | |
535 | node = node->rb_left; | |
a977049d HR |
536 | else |
537 | node = node->rb_right; | |
538 | } | |
539 | return NULL; | |
540 | } | |
541 | ||
542 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
543 | *timewait_info) | |
544 | { | |
545 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
546 | struct rb_node *parent = NULL; | |
547 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
548 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
549 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
550 | |
551 | while (*link) { | |
552 | parent = *link; | |
553 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
554 | remote_id_node); | |
555 | if (remote_id < cur_timewait_info->work.remote_id) | |
556 | link = &(*link)->rb_left; | |
557 | else if (remote_id > cur_timewait_info->work.remote_id) | |
558 | link = &(*link)->rb_right; | |
559 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
560 | link = &(*link)->rb_left; | |
561 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
562 | link = &(*link)->rb_right; | |
563 | else | |
564 | return cur_timewait_info; | |
565 | } | |
566 | timewait_info->inserted_remote_id = 1; | |
567 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
568 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
569 | return NULL; | |
570 | } | |
571 | ||
97f52eb4 SH |
572 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
573 | __be32 remote_id) | |
a977049d HR |
574 | { |
575 | struct rb_node *node = cm.remote_id_table.rb_node; | |
576 | struct cm_timewait_info *timewait_info; | |
577 | ||
578 | while (node) { | |
579 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
580 | remote_id_node); | |
581 | if (remote_id < timewait_info->work.remote_id) | |
582 | node = node->rb_left; | |
583 | else if (remote_id > timewait_info->work.remote_id) | |
584 | node = node->rb_right; | |
585 | else if (remote_ca_guid < timewait_info->remote_ca_guid) | |
586 | node = node->rb_left; | |
587 | else if (remote_ca_guid > timewait_info->remote_ca_guid) | |
588 | node = node->rb_right; | |
589 | else | |
590 | return timewait_info; | |
591 | } | |
592 | return NULL; | |
593 | } | |
594 | ||
595 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
596 | *timewait_info) | |
597 | { | |
598 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
599 | struct rb_node *parent = NULL; | |
600 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
601 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
602 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
603 | |
604 | while (*link) { | |
605 | parent = *link; | |
606 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
607 | remote_qp_node); | |
608 | if (remote_qpn < cur_timewait_info->remote_qpn) | |
609 | link = &(*link)->rb_left; | |
610 | else if (remote_qpn > cur_timewait_info->remote_qpn) | |
611 | link = &(*link)->rb_right; | |
612 | else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) | |
613 | link = &(*link)->rb_left; | |
614 | else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) | |
615 | link = &(*link)->rb_right; | |
616 | else | |
617 | return cur_timewait_info; | |
618 | } | |
619 | timewait_info->inserted_remote_qp = 1; | |
620 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
621 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
622 | return NULL; | |
623 | } | |
624 | ||
625 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
626 | *cm_id_priv) | |
627 | { | |
628 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
629 | struct rb_node *parent = NULL; | |
630 | struct cm_id_private *cur_cm_id_priv; | |
631 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 632 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
633 | |
634 | while (*link) { | |
635 | parent = *link; | |
636 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
637 | sidr_id_node); | |
638 | if (remote_id < cur_cm_id_priv->id.remote_id) | |
639 | link = &(*link)->rb_left; | |
640 | else if (remote_id > cur_cm_id_priv->id.remote_id) | |
641 | link = &(*link)->rb_right; | |
642 | else { | |
643 | int cmp; | |
644 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
645 | sizeof *port_gid); | |
646 | if (cmp < 0) | |
647 | link = &(*link)->rb_left; | |
648 | else if (cmp > 0) | |
649 | link = &(*link)->rb_right; | |
650 | else | |
651 | return cur_cm_id_priv; | |
652 | } | |
653 | } | |
654 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
655 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
656 | return NULL; | |
657 | } | |
658 | ||
659 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
660 | enum ib_cm_sidr_status status) | |
661 | { | |
662 | struct ib_cm_sidr_rep_param param; | |
663 | ||
664 | memset(¶m, 0, sizeof param); | |
665 | param.status = status; | |
666 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
667 | } | |
668 | ||
07d357d0 SH |
669 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
670 | ib_cm_handler cm_handler, | |
a977049d HR |
671 | void *context) |
672 | { | |
673 | struct cm_id_private *cm_id_priv; | |
674 | int ret; | |
675 | ||
de6eb66b | 676 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
677 | if (!cm_id_priv) |
678 | return ERR_PTR(-ENOMEM); | |
679 | ||
a977049d | 680 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 681 | cm_id_priv->id.device = device; |
a977049d HR |
682 | cm_id_priv->id.cm_handler = cm_handler; |
683 | cm_id_priv->id.context = context; | |
354ba39c | 684 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
685 | ret = cm_alloc_id(cm_id_priv); |
686 | if (ret) | |
687 | goto error; | |
688 | ||
689 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 690 | init_completion(&cm_id_priv->comp); |
a977049d HR |
691 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
692 | atomic_set(&cm_id_priv->work_count, -1); | |
693 | atomic_set(&cm_id_priv->refcount, 1); | |
694 | return &cm_id_priv->id; | |
695 | ||
696 | error: | |
697 | kfree(cm_id_priv); | |
698 | return ERR_PTR(-ENOMEM); | |
699 | } | |
700 | EXPORT_SYMBOL(ib_create_cm_id); | |
701 | ||
702 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
703 | { | |
704 | struct cm_work *work; | |
705 | ||
706 | if (list_empty(&cm_id_priv->work_list)) | |
707 | return NULL; | |
708 | ||
709 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
710 | list_del(&work->list); | |
711 | return work; | |
712 | } | |
713 | ||
714 | static void cm_free_work(struct cm_work *work) | |
715 | { | |
716 | if (work->mad_recv_wc) | |
717 | ib_free_recv_mad(work->mad_recv_wc); | |
718 | kfree(work); | |
719 | } | |
720 | ||
721 | static inline int cm_convert_to_ms(int iba_time) | |
722 | { | |
723 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
724 | return 1 << max(iba_time - 8, 0); | |
725 | } | |
726 | ||
1d846126 SH |
727 | /* |
728 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time | |
729 | * Because of how ack_timeout is stored, adding one doubles the timeout. | |
730 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and | |
731 | * increment it (round up) only if the other is within 50%. | |
732 | */ | |
733 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) | |
734 | { | |
735 | int ack_timeout = packet_life_time + 1; | |
736 | ||
737 | if (ack_timeout >= ca_ack_delay) | |
738 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); | |
739 | else | |
740 | ack_timeout = ca_ack_delay + | |
741 | (ack_timeout >= (ca_ack_delay - 1)); | |
742 | ||
743 | return min(31, ack_timeout); | |
744 | } | |
745 | ||
a977049d HR |
746 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
747 | { | |
a977049d HR |
748 | if (timewait_info->inserted_remote_id) { |
749 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
750 | timewait_info->inserted_remote_id = 0; | |
751 | } | |
752 | ||
753 | if (timewait_info->inserted_remote_qp) { | |
754 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
755 | timewait_info->inserted_remote_qp = 0; | |
756 | } | |
a977049d HR |
757 | } |
758 | ||
97f52eb4 | 759 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
760 | { |
761 | struct cm_timewait_info *timewait_info; | |
762 | ||
de6eb66b | 763 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
764 | if (!timewait_info) |
765 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
766 | |
767 | timewait_info->work.local_id = local_id; | |
c4028958 | 768 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
a977049d HR |
769 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
770 | return timewait_info; | |
771 | } | |
772 | ||
773 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
774 | { | |
775 | int wait_time; | |
8575329d | 776 | unsigned long flags; |
a977049d | 777 | |
8575329d | 778 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 779 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
780 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
781 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 782 | |
a977049d HR |
783 | /* |
784 | * The cm_id could be destroyed by the user before we exit timewait. | |
785 | * To protect against this, we search for the cm_id after exiting | |
786 | * timewait before notifying the user that we've exited timewait. | |
787 | */ | |
788 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
1d846126 | 789 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d HR |
790 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
791 | msecs_to_jiffies(wait_time)); | |
792 | cm_id_priv->timewait_info = NULL; | |
793 | } | |
794 | ||
795 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
796 | { | |
8575329d SH |
797 | unsigned long flags; |
798 | ||
a977049d HR |
799 | cm_id_priv->id.state = IB_CM_IDLE; |
800 | if (cm_id_priv->timewait_info) { | |
8575329d | 801 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 802 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 803 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
804 | kfree(cm_id_priv->timewait_info); |
805 | cm_id_priv->timewait_info = NULL; | |
806 | } | |
807 | } | |
808 | ||
04c33543 | 809 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
810 | { |
811 | struct cm_id_private *cm_id_priv; | |
812 | struct cm_work *work; | |
a977049d HR |
813 | |
814 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
815 | retest: | |
24be6e81 | 816 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
817 | switch (cm_id->state) { |
818 | case IB_CM_LISTEN: | |
819 | cm_id->state = IB_CM_IDLE; | |
24be6e81 SH |
820 | spin_unlock_irq(&cm_id_priv->lock); |
821 | spin_lock_irq(&cm.lock); | |
a977049d | 822 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
24be6e81 | 823 | spin_unlock_irq(&cm.lock); |
a977049d HR |
824 | break; |
825 | case IB_CM_SIDR_REQ_SENT: | |
826 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 827 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 828 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
829 | break; |
830 | case IB_CM_SIDR_REQ_RCVD: | |
24be6e81 | 831 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
832 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
833 | break; | |
834 | case IB_CM_REQ_SENT: | |
227eca83 | 835 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 836 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 | 837 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
e971b8cd SH |
838 | &cm_id_priv->id.device->node_guid, |
839 | sizeof cm_id_priv->id.device->node_guid, | |
227eca83 SH |
840 | NULL, 0); |
841 | break; | |
04c33543 MT |
842 | case IB_CM_REQ_RCVD: |
843 | if (err == -ENOMEM) { | |
844 | /* Do not reject to allow future retries. */ | |
845 | cm_reset_to_idle(cm_id_priv); | |
24be6e81 | 846 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 | 847 | } else { |
24be6e81 | 848 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 MT |
849 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
850 | NULL, 0, NULL, 0); | |
851 | } | |
852 | break; | |
a977049d HR |
853 | case IB_CM_MRA_REQ_RCVD: |
854 | case IB_CM_REP_SENT: | |
855 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 856 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 857 | /* Fall through */ |
a977049d HR |
858 | case IB_CM_MRA_REQ_SENT: |
859 | case IB_CM_REP_RCVD: | |
860 | case IB_CM_MRA_REP_SENT: | |
24be6e81 | 861 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 SH |
862 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
863 | NULL, 0, NULL, 0); | |
a977049d HR |
864 | break; |
865 | case IB_CM_ESTABLISHED: | |
24be6e81 | 866 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
867 | ib_send_cm_dreq(cm_id, NULL, 0); |
868 | goto retest; | |
869 | case IB_CM_DREQ_SENT: | |
34816ad9 | 870 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 871 | cm_enter_timewait(cm_id_priv); |
24be6e81 | 872 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
873 | break; |
874 | case IB_CM_DREQ_RCVD: | |
24be6e81 | 875 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
876 | ib_send_cm_drep(cm_id, NULL, 0); |
877 | break; | |
878 | default: | |
24be6e81 | 879 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
880 | break; |
881 | } | |
882 | ||
883 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
884 | cm_deref_id(cm_id_priv); |
885 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
886 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
887 | cm_free_work(work); | |
6e61d04f SH |
888 | kfree(cm_id_priv->compare_data); |
889 | kfree(cm_id_priv->private_data); | |
a977049d HR |
890 | kfree(cm_id_priv); |
891 | } | |
04c33543 MT |
892 | |
893 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
894 | { | |
895 | cm_destroy_id(cm_id, 0); | |
896 | } | |
a977049d HR |
897 | EXPORT_SYMBOL(ib_destroy_cm_id); |
898 | ||
6e61d04f SH |
899 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
900 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
901 | { |
902 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
903 | unsigned long flags; | |
904 | int ret = 0; | |
905 | ||
97f52eb4 SH |
906 | service_mask = service_mask ? service_mask : |
907 | __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
908 | service_id &= service_mask; |
909 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
910 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
911 | return -EINVAL; | |
912 | ||
913 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
914 | if (cm_id->state != IB_CM_IDLE) |
915 | return -EINVAL; | |
916 | ||
917 | if (compare_data) { | |
918 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
919 | GFP_KERNEL); | |
920 | if (!cm_id_priv->compare_data) | |
921 | return -ENOMEM; | |
922 | cm_mask_copy(cm_id_priv->compare_data->data, | |
923 | compare_data->data, compare_data->mask); | |
924 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
925 | IB_CM_COMPARE_SIZE); | |
926 | } | |
a977049d HR |
927 | |
928 | cm_id->state = IB_CM_LISTEN; | |
929 | ||
930 | spin_lock_irqsave(&cm.lock, flags); | |
931 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 SH |
932 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
933 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
934 | } else { |
935 | cm_id->service_id = service_id; | |
936 | cm_id->service_mask = service_mask; | |
937 | } | |
938 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
939 | spin_unlock_irqrestore(&cm.lock, flags); | |
940 | ||
941 | if (cur_cm_id_priv) { | |
942 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
943 | kfree(cm_id_priv->compare_data); |
944 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
945 | ret = -EBUSY; |
946 | } | |
947 | return ret; | |
948 | } | |
949 | EXPORT_SYMBOL(ib_cm_listen); | |
950 | ||
97f52eb4 SH |
951 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
952 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
953 | { |
954 | u64 hi_tid, low_tid; | |
955 | ||
956 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
957 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
958 | (msg_seq << 30)); | |
a977049d HR |
959 | return cpu_to_be64(hi_tid | low_tid); |
960 | } | |
961 | ||
962 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 963 | __be16 attr_id, __be64 tid) |
a977049d HR |
964 | { |
965 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
966 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
967 | hdr->class_version = IB_CM_CLASS_VERSION; | |
968 | hdr->method = IB_MGMT_METHOD_SEND; | |
969 | hdr->attr_id = attr_id; | |
970 | hdr->tid = tid; | |
971 | } | |
972 | ||
973 | static void cm_format_req(struct cm_req_msg *req_msg, | |
974 | struct cm_id_private *cm_id_priv, | |
975 | struct ib_cm_req_param *param) | |
976 | { | |
977 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, | |
978 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
979 | ||
980 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
981 | req_msg->service_id = param->service_id; | |
e971b8cd | 982 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d HR |
983 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
984 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
985 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
986 | cm_req_set_remote_resp_timeout(req_msg, | |
987 | param->remote_cm_response_timeout); | |
988 | cm_req_set_qp_type(req_msg, param->qp_type); | |
989 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
990 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
991 | cm_req_set_local_resp_timeout(req_msg, | |
992 | param->local_cm_response_timeout); | |
993 | cm_req_set_retry_count(req_msg, param->retry_count); | |
994 | req_msg->pkey = param->primary_path->pkey; | |
995 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
996 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
997 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
998 | cm_req_set_srq(req_msg, param->srq); | |
999 | ||
1000 | req_msg->primary_local_lid = param->primary_path->slid; | |
1001 | req_msg->primary_remote_lid = param->primary_path->dlid; | |
1002 | req_msg->primary_local_gid = param->primary_path->sgid; | |
1003 | req_msg->primary_remote_gid = param->primary_path->dgid; | |
1004 | cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); | |
1005 | cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); | |
1006 | req_msg->primary_traffic_class = param->primary_path->traffic_class; | |
1007 | req_msg->primary_hop_limit = param->primary_path->hop_limit; | |
1008 | cm_req_set_primary_sl(req_msg, param->primary_path->sl); | |
1009 | cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ | |
1010 | cm_req_set_primary_local_ack_timeout(req_msg, | |
1d846126 SH |
1011 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
1012 | param->primary_path->packet_life_time)); | |
a977049d HR |
1013 | |
1014 | if (param->alternate_path) { | |
1015 | req_msg->alt_local_lid = param->alternate_path->slid; | |
1016 | req_msg->alt_remote_lid = param->alternate_path->dlid; | |
1017 | req_msg->alt_local_gid = param->alternate_path->sgid; | |
1018 | req_msg->alt_remote_gid = param->alternate_path->dgid; | |
1019 | cm_req_set_alt_flow_label(req_msg, | |
1020 | param->alternate_path->flow_label); | |
1021 | cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); | |
1022 | req_msg->alt_traffic_class = param->alternate_path->traffic_class; | |
1023 | req_msg->alt_hop_limit = param->alternate_path->hop_limit; | |
1024 | cm_req_set_alt_sl(req_msg, param->alternate_path->sl); | |
1025 | cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ | |
1026 | cm_req_set_alt_local_ack_timeout(req_msg, | |
1d846126 SH |
1027 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
1028 | param->alternate_path->packet_life_time)); | |
a977049d HR |
1029 | } |
1030 | ||
1031 | if (param->private_data && param->private_data_len) | |
1032 | memcpy(req_msg->private_data, param->private_data, | |
1033 | param->private_data_len); | |
1034 | } | |
1035 | ||
858119e1 | 1036 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
1037 | { |
1038 | /* peer-to-peer not supported */ | |
1039 | if (param->peer_to_peer) | |
1040 | return -EINVAL; | |
1041 | ||
1042 | if (!param->primary_path) | |
1043 | return -EINVAL; | |
1044 | ||
1045 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
1046 | return -EINVAL; | |
1047 | ||
1048 | if (param->private_data && | |
1049 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
1050 | return -EINVAL; | |
1051 | ||
1052 | if (param->alternate_path && | |
1053 | (param->alternate_path->pkey != param->primary_path->pkey || | |
1054 | param->alternate_path->mtu != param->primary_path->mtu)) | |
1055 | return -EINVAL; | |
1056 | ||
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
1061 | struct ib_cm_req_param *param) | |
1062 | { | |
1063 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1064 | struct cm_req_msg *req_msg; |
1065 | unsigned long flags; | |
1066 | int ret; | |
1067 | ||
1068 | ret = cm_validate_req_param(param); | |
1069 | if (ret) | |
1070 | return ret; | |
1071 | ||
1072 | /* Verify that we're not in timewait. */ | |
1073 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1074 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1075 | if (cm_id->state != IB_CM_IDLE) { | |
1076 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1077 | ret = -EINVAL; | |
1078 | goto out; | |
1079 | } | |
1080 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1081 | ||
1082 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1083 | id.local_id); | |
75df23e2 SH |
1084 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1085 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 1086 | goto out; |
75df23e2 | 1087 | } |
a977049d HR |
1088 | |
1089 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
1090 | if (ret) | |
1091 | goto error1; | |
1092 | if (param->alternate_path) { | |
1093 | ret = cm_init_av_by_path(param->alternate_path, | |
1094 | &cm_id_priv->alt_av); | |
1095 | if (ret) | |
1096 | goto error1; | |
1097 | } | |
1098 | cm_id->service_id = param->service_id; | |
97f52eb4 | 1099 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1100 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1101 | param->primary_path->packet_life_time) * 2 + | |
1102 | cm_convert_to_ms( | |
1103 | param->remote_cm_response_timeout); | |
1104 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1105 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1106 | cm_id_priv->responder_resources = param->responder_resources; | |
1107 | cm_id_priv->retry_count = param->retry_count; | |
1108 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1109 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1110 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1111 | |
1112 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1113 | if (ret) | |
1114 | goto error1; | |
1115 | ||
1116 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1117 | cm_format_req(req_msg, cm_id_priv, param); | |
1118 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1119 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1120 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1121 | ||
1122 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1123 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
a977049d HR |
1124 | |
1125 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1126 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1127 | if (ret) { |
1128 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1129 | goto error2; | |
1130 | } | |
1131 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1132 | cm_id->state = IB_CM_REQ_SENT; | |
1133 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1134 | return 0; | |
1135 | ||
1136 | error2: cm_free_msg(cm_id_priv->msg); | |
1137 | error1: kfree(cm_id_priv->timewait_info); | |
1138 | out: return ret; | |
1139 | } | |
1140 | EXPORT_SYMBOL(ib_send_cm_req); | |
1141 | ||
1142 | static int cm_issue_rej(struct cm_port *port, | |
1143 | struct ib_mad_recv_wc *mad_recv_wc, | |
1144 | enum ib_cm_rej_reason reason, | |
1145 | enum cm_msg_response msg_rejected, | |
1146 | void *ari, u8 ari_length) | |
1147 | { | |
1148 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1149 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1150 | int ret; | |
1151 | ||
1152 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1153 | if (ret) | |
1154 | return ret; | |
1155 | ||
1156 | /* We just need common CM header information. Cast to any message. */ | |
1157 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1158 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1159 | ||
1160 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1161 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1162 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1163 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1164 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1165 | |
1166 | if (ari && ari_length) { | |
1167 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1168 | memcpy(rej_msg->ari, ari, ari_length); | |
1169 | } | |
1170 | ||
34816ad9 | 1171 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1172 | if (ret) |
1173 | cm_free_msg(msg); | |
1174 | ||
1175 | return ret; | |
1176 | } | |
1177 | ||
97f52eb4 SH |
1178 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1179 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1180 | { |
1181 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1182 | ((local_ca_guid == remote_ca_guid) && | |
1183 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1184 | } | |
1185 | ||
858119e1 | 1186 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1187 | struct ib_sa_path_rec *primary_path, |
1188 | struct ib_sa_path_rec *alt_path) | |
1189 | { | |
1190 | memset(primary_path, 0, sizeof *primary_path); | |
1191 | primary_path->dgid = req_msg->primary_local_gid; | |
1192 | primary_path->sgid = req_msg->primary_remote_gid; | |
1193 | primary_path->dlid = req_msg->primary_local_lid; | |
1194 | primary_path->slid = req_msg->primary_remote_lid; | |
1195 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1196 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1197 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1198 | primary_path->reversible = 1; | |
1199 | primary_path->pkey = req_msg->pkey; | |
1200 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1201 | primary_path->mtu_selector = IB_SA_EQ; | |
1202 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1203 | primary_path->rate_selector = IB_SA_EQ; | |
1204 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1205 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1206 | primary_path->packet_life_time = | |
1207 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1208 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1209 | ||
1210 | if (req_msg->alt_local_lid) { | |
1211 | memset(alt_path, 0, sizeof *alt_path); | |
1212 | alt_path->dgid = req_msg->alt_local_gid; | |
1213 | alt_path->sgid = req_msg->alt_remote_gid; | |
1214 | alt_path->dlid = req_msg->alt_local_lid; | |
1215 | alt_path->slid = req_msg->alt_remote_lid; | |
1216 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1217 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1218 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1219 | alt_path->reversible = 1; | |
1220 | alt_path->pkey = req_msg->pkey; | |
1221 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1222 | alt_path->mtu_selector = IB_SA_EQ; | |
1223 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1224 | alt_path->rate_selector = IB_SA_EQ; | |
1225 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1226 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1227 | alt_path->packet_life_time = | |
1228 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1229 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1230 | } | |
1231 | } | |
1232 | ||
1233 | static void cm_format_req_event(struct cm_work *work, | |
1234 | struct cm_id_private *cm_id_priv, | |
1235 | struct ib_cm_id *listen_id) | |
1236 | { | |
1237 | struct cm_req_msg *req_msg; | |
1238 | struct ib_cm_req_event_param *param; | |
1239 | ||
1240 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1241 | param = &work->cm_event.param.req_rcvd; | |
1242 | param->listen_id = listen_id; | |
a977049d HR |
1243 | param->port = cm_id_priv->av.port->port_num; |
1244 | param->primary_path = &work->path[0]; | |
1245 | if (req_msg->alt_local_lid) | |
1246 | param->alternate_path = &work->path[1]; | |
1247 | else | |
1248 | param->alternate_path = NULL; | |
1249 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1250 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1251 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1252 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1253 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1254 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1255 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1256 | param->local_cm_response_timeout = | |
1257 | cm_req_get_remote_resp_timeout(req_msg); | |
1258 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1259 | param->remote_cm_response_timeout = | |
1260 | cm_req_get_local_resp_timeout(req_msg); | |
1261 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1262 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1263 | param->srq = cm_req_get_srq(req_msg); | |
1264 | work->cm_event.private_data = &req_msg->private_data; | |
1265 | } | |
1266 | ||
1267 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1268 | struct cm_work *work) | |
1269 | { | |
a977049d HR |
1270 | int ret; |
1271 | ||
1272 | /* We will typically only have the current event to report. */ | |
1273 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1274 | cm_free_work(work); | |
1275 | ||
1276 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1277 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1278 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1279 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1280 | BUG_ON(!work); |
1281 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1282 | &work->cm_event); | |
1283 | cm_free_work(work); | |
1284 | } | |
1285 | cm_deref_id(cm_id_priv); | |
1286 | if (ret) | |
04c33543 | 1287 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1288 | } |
1289 | ||
1290 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1291 | struct cm_id_private *cm_id_priv, | |
1292 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1293 | const void *private_data, u8 private_data_len) | |
1294 | { | |
1295 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1296 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1297 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1298 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1299 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1300 | ||
1301 | if (private_data && private_data_len) | |
1302 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1303 | } | |
1304 | ||
1305 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1306 | struct cm_id_private *cm_id_priv, | |
1307 | enum ib_cm_rej_reason reason, | |
1308 | void *ari, | |
1309 | u8 ari_length, | |
1310 | const void *private_data, | |
1311 | u8 private_data_len) | |
1312 | { | |
1313 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1314 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1315 | ||
1316 | switch(cm_id_priv->id.state) { | |
1317 | case IB_CM_REQ_RCVD: | |
1318 | rej_msg->local_comm_id = 0; | |
1319 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1320 | break; | |
1321 | case IB_CM_MRA_REQ_SENT: | |
1322 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1323 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1324 | break; | |
1325 | case IB_CM_REP_RCVD: | |
1326 | case IB_CM_MRA_REP_SENT: | |
1327 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1328 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1329 | break; | |
1330 | default: | |
1331 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1332 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1333 | break; | |
1334 | } | |
1335 | ||
97f52eb4 | 1336 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1337 | if (ari && ari_length) { |
1338 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1339 | memcpy(rej_msg->ari, ari, ari_length); | |
1340 | } | |
1341 | ||
1342 | if (private_data && private_data_len) | |
1343 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1344 | } | |
1345 | ||
1346 | static void cm_dup_req_handler(struct cm_work *work, | |
1347 | struct cm_id_private *cm_id_priv) | |
1348 | { | |
1349 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1350 | int ret; |
1351 | ||
9af57b7a SH |
1352 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1353 | counter[CM_REQ_COUNTER]); | |
1354 | ||
a977049d HR |
1355 | /* Quick state check to discard duplicate REQs. */ |
1356 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1357 | return; | |
1358 | ||
1359 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1360 | if (ret) | |
1361 | return; | |
1362 | ||
24be6e81 | 1363 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1364 | switch (cm_id_priv->id.state) { |
1365 | case IB_CM_MRA_REQ_SENT: | |
1366 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1367 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1368 | cm_id_priv->private_data, | |
1369 | cm_id_priv->private_data_len); | |
1370 | break; | |
1371 | case IB_CM_TIMEWAIT: | |
1372 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1373 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1374 | break; | |
1375 | default: | |
1376 | goto unlock; | |
1377 | } | |
24be6e81 | 1378 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1379 | |
34816ad9 | 1380 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1381 | if (ret) |
1382 | goto free; | |
1383 | return; | |
1384 | ||
24be6e81 | 1385 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1386 | free: cm_free_msg(msg); |
1387 | } | |
1388 | ||
1389 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1390 | struct cm_id_private *cm_id_priv) | |
1391 | { | |
1392 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1393 | struct cm_timewait_info *timewait_info; | |
1394 | struct cm_req_msg *req_msg; | |
a977049d HR |
1395 | |
1396 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1397 | ||
d998ccce | 1398 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1399 | spin_lock_irq(&cm.lock); |
a977049d | 1400 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d HR |
1401 | if (timewait_info) { |
1402 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1403 | timewait_info->work.remote_id); | |
24be6e81 | 1404 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1405 | if (cur_cm_id_priv) { |
1406 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1407 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1408 | } |
1409 | return NULL; | |
1410 | } | |
1411 | ||
1412 | /* Check for stale connections. */ | |
1413 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1414 | if (timewait_info) { | |
1415 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
24be6e81 | 1416 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1417 | cm_issue_rej(work->port, work->mad_recv_wc, |
1418 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1419 | NULL, 0); | |
1420 | return NULL; | |
a977049d HR |
1421 | } |
1422 | ||
1423 | /* Find matching listen request. */ | |
07d357d0 | 1424 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1425 | req_msg->service_id, |
1426 | req_msg->private_data); | |
a977049d | 1427 | if (!listen_cm_id_priv) { |
8575329d | 1428 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
24be6e81 | 1429 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1430 | cm_issue_rej(work->port, work->mad_recv_wc, |
1431 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1432 | NULL, 0); | |
8575329d | 1433 | goto out; |
a977049d HR |
1434 | } |
1435 | atomic_inc(&listen_cm_id_priv->refcount); | |
1436 | atomic_inc(&cm_id_priv->refcount); | |
1437 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1438 | atomic_inc(&cm_id_priv->work_count); | |
24be6e81 | 1439 | spin_unlock_irq(&cm.lock); |
8575329d | 1440 | out: |
a977049d | 1441 | return listen_cm_id_priv; |
a977049d HR |
1442 | } |
1443 | ||
1444 | static int cm_req_handler(struct cm_work *work) | |
1445 | { | |
1446 | struct ib_cm_id *cm_id; | |
1447 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1448 | struct cm_req_msg *req_msg; | |
1449 | int ret; | |
1450 | ||
1451 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1452 | ||
07d357d0 | 1453 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
1454 | if (IS_ERR(cm_id)) |
1455 | return PTR_ERR(cm_id); | |
1456 | ||
1457 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1458 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1459 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1460 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1461 | &cm_id_priv->av); |
1462 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1463 | id.local_id); | |
1464 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1465 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1466 | goto destroy; |
a977049d HR |
1467 | } |
1468 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1469 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1470 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1471 | ||
1472 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1473 | if (!listen_cm_id_priv) { | |
1474 | ret = -EINVAL; | |
76842405 SH |
1475 | kfree(cm_id_priv->timewait_info); |
1476 | goto destroy; | |
a977049d HR |
1477 | } |
1478 | ||
1479 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1480 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1481 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1482 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1483 | |
1484 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); | |
1485 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
76842405 SH |
1486 | if (ret) { |
1487 | ib_get_cached_gid(work->port->cm_dev->device, | |
1488 | work->port->port_num, 0, &work->path[0].sgid); | |
1489 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1490 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1491 | NULL, 0); | |
1492 | goto rejected; | |
1493 | } | |
a977049d HR |
1494 | if (req_msg->alt_local_lid) { |
1495 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1496 | if (ret) { |
1497 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1498 | &work->path[0].sgid, | |
1499 | sizeof work->path[0].sgid, NULL, 0); | |
1500 | goto rejected; | |
1501 | } | |
a977049d HR |
1502 | } |
1503 | cm_id_priv->tid = req_msg->hdr.tid; | |
1504 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1505 | cm_req_get_local_resp_timeout(req_msg)); | |
1506 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1507 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1508 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1509 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1510 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
e1444b5a | 1511 | cm_id_priv->pkey = req_msg->pkey; |
a977049d | 1512 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
a977049d HR |
1513 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
1514 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1515 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1516 | |
1517 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1518 | cm_process_work(cm_id_priv, work); | |
1519 | cm_deref_id(listen_cm_id_priv); | |
1520 | return 0; | |
1521 | ||
76842405 SH |
1522 | rejected: |
1523 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1524 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1525 | destroy: |
1526 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1527 | return ret; |
1528 | } | |
1529 | ||
1530 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1531 | struct cm_id_private *cm_id_priv, | |
1532 | struct ib_cm_rep_param *param) | |
1533 | { | |
1534 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1535 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1536 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1537 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1538 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1539 | rep_msg->resp_resources = param->responder_resources; | |
1540 | rep_msg->initiator_depth = param->initiator_depth; | |
1d846126 SH |
1541 | cm_rep_set_target_ack_delay(rep_msg, |
1542 | cm_id_priv->av.port->cm_dev->ack_delay); | |
a977049d HR |
1543 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
1544 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1545 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1546 | cm_rep_set_srq(rep_msg, param->srq); | |
e971b8cd | 1547 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d HR |
1548 | |
1549 | if (param->private_data && param->private_data_len) | |
1550 | memcpy(rep_msg->private_data, param->private_data, | |
1551 | param->private_data_len); | |
1552 | } | |
1553 | ||
1554 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1555 | struct ib_cm_rep_param *param) | |
1556 | { | |
1557 | struct cm_id_private *cm_id_priv; | |
1558 | struct ib_mad_send_buf *msg; | |
1559 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1560 | unsigned long flags; |
1561 | int ret; | |
1562 | ||
1563 | if (param->private_data && | |
1564 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1565 | return -EINVAL; | |
1566 | ||
1567 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1568 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1569 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1570 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1571 | ret = -EINVAL; | |
1572 | goto out; | |
1573 | } | |
1574 | ||
1575 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1576 | if (ret) | |
1577 | goto out; | |
1578 | ||
1579 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1580 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1581 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1582 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1583 | ||
34816ad9 | 1584 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1585 | if (ret) { |
1586 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1587 | cm_free_msg(msg); | |
1588 | return ret; | |
1589 | } | |
1590 | ||
1591 | cm_id->state = IB_CM_REP_SENT; | |
1592 | cm_id_priv->msg = msg; | |
1593 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1594 | cm_id_priv->responder_resources = param->responder_resources; | |
1595 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1596 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1597 | ||
1598 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1599 | return ret; | |
1600 | } | |
1601 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1602 | ||
1603 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1604 | struct cm_id_private *cm_id_priv, | |
1605 | const void *private_data, | |
1606 | u8 private_data_len) | |
1607 | { | |
1608 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1609 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1610 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1611 | ||
1612 | if (private_data && private_data_len) | |
1613 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1614 | } | |
1615 | ||
1616 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1617 | const void *private_data, | |
1618 | u8 private_data_len) | |
1619 | { | |
1620 | struct cm_id_private *cm_id_priv; | |
1621 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1622 | unsigned long flags; |
1623 | void *data; | |
1624 | int ret; | |
1625 | ||
1626 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1627 | return -EINVAL; | |
1628 | ||
1629 | data = cm_copy_private_data(private_data, private_data_len); | |
1630 | if (IS_ERR(data)) | |
1631 | return PTR_ERR(data); | |
1632 | ||
1633 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1634 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1635 | if (cm_id->state != IB_CM_REP_RCVD && | |
1636 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1637 | ret = -EINVAL; | |
1638 | goto error; | |
1639 | } | |
1640 | ||
1641 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1642 | if (ret) | |
1643 | goto error; | |
1644 | ||
1645 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1646 | private_data, private_data_len); | |
1647 | ||
34816ad9 | 1648 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1649 | if (ret) { |
1650 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1651 | cm_free_msg(msg); | |
1652 | kfree(data); | |
1653 | return ret; | |
1654 | } | |
1655 | ||
1656 | cm_id->state = IB_CM_ESTABLISHED; | |
1657 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1658 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1659 | return 0; | |
1660 | ||
1661 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1662 | kfree(data); | |
1663 | return ret; | |
1664 | } | |
1665 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1666 | ||
1667 | static void cm_format_rep_event(struct cm_work *work) | |
1668 | { | |
1669 | struct cm_rep_msg *rep_msg; | |
1670 | struct ib_cm_rep_event_param *param; | |
1671 | ||
1672 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1673 | param = &work->cm_event.param.rep_rcvd; | |
1674 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1675 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1676 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1677 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1678 | param->responder_resources = rep_msg->initiator_depth; | |
1679 | param->initiator_depth = rep_msg->resp_resources; | |
1680 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1681 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1682 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1683 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1684 | param->srq = cm_rep_get_srq(rep_msg); | |
1685 | work->cm_event.private_data = &rep_msg->private_data; | |
1686 | } | |
1687 | ||
1688 | static void cm_dup_rep_handler(struct cm_work *work) | |
1689 | { | |
1690 | struct cm_id_private *cm_id_priv; | |
1691 | struct cm_rep_msg *rep_msg; | |
1692 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1693 | int ret; |
1694 | ||
1695 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1696 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1697 | rep_msg->local_comm_id); | |
1698 | if (!cm_id_priv) | |
1699 | return; | |
1700 | ||
9af57b7a SH |
1701 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1702 | counter[CM_REP_COUNTER]); | |
a977049d HR |
1703 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
1704 | if (ret) | |
1705 | goto deref; | |
1706 | ||
24be6e81 | 1707 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1708 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
1709 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1710 | cm_id_priv->private_data, | |
1711 | cm_id_priv->private_data_len); | |
1712 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1713 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1714 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1715 | cm_id_priv->private_data, | |
1716 | cm_id_priv->private_data_len); | |
1717 | else | |
1718 | goto unlock; | |
24be6e81 | 1719 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1720 | |
34816ad9 | 1721 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1722 | if (ret) |
1723 | goto free; | |
1724 | goto deref; | |
1725 | ||
24be6e81 | 1726 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1727 | free: cm_free_msg(msg); |
1728 | deref: cm_deref_id(cm_id_priv); | |
1729 | } | |
1730 | ||
1731 | static int cm_rep_handler(struct cm_work *work) | |
1732 | { | |
1733 | struct cm_id_private *cm_id_priv; | |
1734 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1735 | int ret; |
1736 | ||
1737 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1738 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1739 | if (!cm_id_priv) { | |
1740 | cm_dup_rep_handler(work); | |
1741 | return -EINVAL; | |
1742 | } | |
1743 | ||
87fd1a11 SH |
1744 | cm_format_rep_event(work); |
1745 | ||
24be6e81 | 1746 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1747 | switch (cm_id_priv->id.state) { |
1748 | case IB_CM_REQ_SENT: | |
1749 | case IB_CM_MRA_REQ_RCVD: | |
1750 | break; | |
1751 | default: | |
24be6e81 | 1752 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1753 | ret = -EINVAL; |
1754 | goto error; | |
1755 | } | |
1756 | ||
a977049d HR |
1757 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1758 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1759 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1760 | ||
87fd1a11 | 1761 | spin_lock(&cm.lock); |
a977049d HR |
1762 | /* Check for duplicate REP. */ |
1763 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 1764 | spin_unlock(&cm.lock); |
24be6e81 | 1765 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1766 | ret = -EINVAL; |
1767 | goto error; | |
1768 | } | |
1769 | /* Check for a stale connection. */ | |
1770 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1771 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1772 | &cm.remote_id_table); | |
1773 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1774 | spin_unlock(&cm.lock); | |
24be6e81 | 1775 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1776 | cm_issue_rej(work->port, work->mad_recv_wc, |
1777 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1778 | NULL, 0); | |
1779 | ret = -EINVAL; | |
1780 | goto error; | |
1781 | } | |
87fd1a11 | 1782 | spin_unlock(&cm.lock); |
a977049d | 1783 | |
a977049d HR |
1784 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1785 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1786 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1787 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1788 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1789 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1790 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1d846126 SH |
1791 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
1792 | cm_id_priv->av.timeout = | |
1793 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1794 | cm_id_priv->av.timeout - 1); | |
1795 | cm_id_priv->alt_av.timeout = | |
1796 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1797 | cm_id_priv->alt_av.timeout - 1); | |
a977049d HR |
1798 | |
1799 | /* todo: handle peer_to_peer */ | |
1800 | ||
34816ad9 | 1801 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1802 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1803 | if (!ret) | |
1804 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1805 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1806 | |
1807 | if (ret) | |
1808 | cm_process_work(cm_id_priv, work); | |
1809 | else | |
1810 | cm_deref_id(cm_id_priv); | |
1811 | return 0; | |
1812 | ||
87fd1a11 | 1813 | error: |
a977049d HR |
1814 | cm_deref_id(cm_id_priv); |
1815 | return ret; | |
1816 | } | |
1817 | ||
1818 | static int cm_establish_handler(struct cm_work *work) | |
1819 | { | |
1820 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1821 | int ret; |
1822 | ||
e1444b5a | 1823 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
1824 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
1825 | if (!cm_id_priv) | |
1826 | return -EINVAL; | |
1827 | ||
24be6e81 | 1828 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1829 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 1830 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1831 | goto out; |
1832 | } | |
1833 | ||
34816ad9 | 1834 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1835 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1836 | if (!ret) | |
1837 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1838 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1839 | |
1840 | if (ret) | |
1841 | cm_process_work(cm_id_priv, work); | |
1842 | else | |
1843 | cm_deref_id(cm_id_priv); | |
1844 | return 0; | |
1845 | out: | |
1846 | cm_deref_id(cm_id_priv); | |
1847 | return -EINVAL; | |
1848 | } | |
1849 | ||
1850 | static int cm_rtu_handler(struct cm_work *work) | |
1851 | { | |
1852 | struct cm_id_private *cm_id_priv; | |
1853 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
1854 | int ret; |
1855 | ||
1856 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1857 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1858 | rtu_msg->local_comm_id); | |
1859 | if (!cm_id_priv) | |
1860 | return -EINVAL; | |
1861 | ||
1862 | work->cm_event.private_data = &rtu_msg->private_data; | |
1863 | ||
24be6e81 | 1864 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1865 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
1866 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 1867 | spin_unlock_irq(&cm_id_priv->lock); |
9af57b7a SH |
1868 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1869 | counter[CM_RTU_COUNTER]); | |
a977049d HR |
1870 | goto out; |
1871 | } | |
1872 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1873 | ||
34816ad9 | 1874 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1875 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1876 | if (!ret) | |
1877 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1878 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1879 | |
1880 | if (ret) | |
1881 | cm_process_work(cm_id_priv, work); | |
1882 | else | |
1883 | cm_deref_id(cm_id_priv); | |
1884 | return 0; | |
1885 | out: | |
1886 | cm_deref_id(cm_id_priv); | |
1887 | return -EINVAL; | |
1888 | } | |
1889 | ||
1890 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1891 | struct cm_id_private *cm_id_priv, | |
1892 | const void *private_data, | |
1893 | u8 private_data_len) | |
1894 | { | |
1895 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1896 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1897 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1898 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1899 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1900 | ||
1901 | if (private_data && private_data_len) | |
1902 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1903 | } | |
1904 | ||
1905 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1906 | const void *private_data, | |
1907 | u8 private_data_len) | |
1908 | { | |
1909 | struct cm_id_private *cm_id_priv; | |
1910 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1911 | unsigned long flags; |
1912 | int ret; | |
1913 | ||
1914 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1915 | return -EINVAL; | |
1916 | ||
1917 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1918 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1919 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1920 | ret = -EINVAL; | |
1921 | goto out; | |
1922 | } | |
1923 | ||
1924 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1925 | if (ret) { | |
1926 | cm_enter_timewait(cm_id_priv); | |
1927 | goto out; | |
1928 | } | |
1929 | ||
1930 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1931 | private_data, private_data_len); | |
34816ad9 | 1932 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1933 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
1934 | ||
34816ad9 | 1935 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1936 | if (ret) { |
1937 | cm_enter_timewait(cm_id_priv); | |
1938 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1939 | cm_free_msg(msg); | |
1940 | return ret; | |
1941 | } | |
1942 | ||
1943 | cm_id->state = IB_CM_DREQ_SENT; | |
1944 | cm_id_priv->msg = msg; | |
1945 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1946 | return ret; | |
1947 | } | |
1948 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1949 | ||
1950 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1951 | struct cm_id_private *cm_id_priv, | |
1952 | const void *private_data, | |
1953 | u8 private_data_len) | |
1954 | { | |
1955 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1956 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1957 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1958 | ||
1959 | if (private_data && private_data_len) | |
1960 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
1961 | } | |
1962 | ||
1963 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
1964 | const void *private_data, | |
1965 | u8 private_data_len) | |
1966 | { | |
1967 | struct cm_id_private *cm_id_priv; | |
1968 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1969 | unsigned long flags; |
1970 | void *data; | |
1971 | int ret; | |
1972 | ||
1973 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
1974 | return -EINVAL; | |
1975 | ||
1976 | data = cm_copy_private_data(private_data, private_data_len); | |
1977 | if (IS_ERR(data)) | |
1978 | return PTR_ERR(data); | |
1979 | ||
1980 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1981 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1982 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
1983 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1984 | kfree(data); | |
1985 | return -EINVAL; | |
1986 | } | |
1987 | ||
1988 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1989 | cm_enter_timewait(cm_id_priv); | |
1990 | ||
1991 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1992 | if (ret) | |
1993 | goto out; | |
1994 | ||
1995 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
1996 | private_data, private_data_len); | |
1997 | ||
34816ad9 | 1998 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1999 | if (ret) { |
2000 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2001 | cm_free_msg(msg); | |
2002 | return ret; | |
2003 | } | |
2004 | ||
2005 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2006 | return ret; | |
2007 | } | |
2008 | EXPORT_SYMBOL(ib_send_cm_drep); | |
2009 | ||
82a9c16a SH |
2010 | static int cm_issue_drep(struct cm_port *port, |
2011 | struct ib_mad_recv_wc *mad_recv_wc) | |
2012 | { | |
2013 | struct ib_mad_send_buf *msg = NULL; | |
2014 | struct cm_dreq_msg *dreq_msg; | |
2015 | struct cm_drep_msg *drep_msg; | |
2016 | int ret; | |
2017 | ||
2018 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
2019 | if (ret) | |
2020 | return ret; | |
2021 | ||
2022 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
2023 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
2024 | ||
2025 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
2026 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
2027 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
2028 | ||
2029 | ret = ib_post_send_mad(msg, NULL); | |
2030 | if (ret) | |
2031 | cm_free_msg(msg); | |
2032 | ||
2033 | return ret; | |
2034 | } | |
2035 | ||
a977049d HR |
2036 | static int cm_dreq_handler(struct cm_work *work) |
2037 | { | |
2038 | struct cm_id_private *cm_id_priv; | |
2039 | struct cm_dreq_msg *dreq_msg; | |
2040 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2041 | int ret; |
2042 | ||
2043 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
2044 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
2045 | dreq_msg->local_comm_id); | |
82a9c16a | 2046 | if (!cm_id_priv) { |
9af57b7a SH |
2047 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2048 | counter[CM_DREQ_COUNTER]); | |
82a9c16a | 2049 | cm_issue_drep(work->port, work->mad_recv_wc); |
a977049d | 2050 | return -EINVAL; |
82a9c16a | 2051 | } |
a977049d HR |
2052 | |
2053 | work->cm_event.private_data = &dreq_msg->private_data; | |
2054 | ||
24be6e81 | 2055 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2056 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
2057 | goto unlock; | |
2058 | ||
2059 | switch (cm_id_priv->id.state) { | |
2060 | case IB_CM_REP_SENT: | |
2061 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2062 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2063 | break; |
2064 | case IB_CM_ESTABLISHED: | |
2065 | case IB_CM_MRA_REP_RCVD: | |
2066 | break; | |
2067 | case IB_CM_TIMEWAIT: | |
9af57b7a SH |
2068 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2069 | counter[CM_DREQ_COUNTER]); | |
a977049d HR |
2070 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2071 | goto unlock; | |
2072 | ||
2073 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2074 | cm_id_priv->private_data, | |
2075 | cm_id_priv->private_data_len); | |
24be6e81 | 2076 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2077 | |
34816ad9 | 2078 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2079 | cm_free_msg(msg); |
2080 | goto deref; | |
9af57b7a SH |
2081 | case IB_CM_DREQ_RCVD: |
2082 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2083 | counter[CM_DREQ_COUNTER]); | |
2084 | goto unlock; | |
a977049d HR |
2085 | default: |
2086 | goto unlock; | |
2087 | } | |
2088 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
2089 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
2090 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2091 | if (!ret) | |
2092 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2093 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2094 | |
2095 | if (ret) | |
2096 | cm_process_work(cm_id_priv, work); | |
2097 | else | |
2098 | cm_deref_id(cm_id_priv); | |
2099 | return 0; | |
2100 | ||
24be6e81 | 2101 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2102 | deref: cm_deref_id(cm_id_priv); |
2103 | return -EINVAL; | |
2104 | } | |
2105 | ||
2106 | static int cm_drep_handler(struct cm_work *work) | |
2107 | { | |
2108 | struct cm_id_private *cm_id_priv; | |
2109 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2110 | int ret; |
2111 | ||
2112 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2113 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2114 | drep_msg->local_comm_id); | |
2115 | if (!cm_id_priv) | |
2116 | return -EINVAL; | |
2117 | ||
2118 | work->cm_event.private_data = &drep_msg->private_data; | |
2119 | ||
24be6e81 | 2120 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2121 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2122 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2123 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2124 | goto out; |
2125 | } | |
2126 | cm_enter_timewait(cm_id_priv); | |
2127 | ||
34816ad9 | 2128 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2129 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2130 | if (!ret) | |
2131 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2132 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2133 | |
2134 | if (ret) | |
2135 | cm_process_work(cm_id_priv, work); | |
2136 | else | |
2137 | cm_deref_id(cm_id_priv); | |
2138 | return 0; | |
2139 | out: | |
2140 | cm_deref_id(cm_id_priv); | |
2141 | return -EINVAL; | |
2142 | } | |
2143 | ||
2144 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2145 | enum ib_cm_rej_reason reason, | |
2146 | void *ari, | |
2147 | u8 ari_length, | |
2148 | const void *private_data, | |
2149 | u8 private_data_len) | |
2150 | { | |
2151 | struct cm_id_private *cm_id_priv; | |
2152 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2153 | unsigned long flags; |
2154 | int ret; | |
2155 | ||
2156 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2157 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2158 | return -EINVAL; | |
2159 | ||
2160 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2161 | ||
2162 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2163 | switch (cm_id->state) { | |
2164 | case IB_CM_REQ_SENT: | |
2165 | case IB_CM_MRA_REQ_RCVD: | |
2166 | case IB_CM_REQ_RCVD: | |
2167 | case IB_CM_MRA_REQ_SENT: | |
2168 | case IB_CM_REP_RCVD: | |
2169 | case IB_CM_MRA_REP_SENT: | |
2170 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2171 | if (!ret) | |
2172 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2173 | cm_id_priv, reason, ari, ari_length, | |
2174 | private_data, private_data_len); | |
2175 | ||
2176 | cm_reset_to_idle(cm_id_priv); | |
2177 | break; | |
2178 | case IB_CM_REP_SENT: | |
2179 | case IB_CM_MRA_REP_RCVD: | |
2180 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2181 | if (!ret) | |
2182 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2183 | cm_id_priv, reason, ari, ari_length, | |
2184 | private_data, private_data_len); | |
2185 | ||
2186 | cm_enter_timewait(cm_id_priv); | |
2187 | break; | |
2188 | default: | |
2189 | ret = -EINVAL; | |
2190 | goto out; | |
2191 | } | |
2192 | ||
2193 | if (ret) | |
2194 | goto out; | |
2195 | ||
34816ad9 | 2196 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2197 | if (ret) |
2198 | cm_free_msg(msg); | |
2199 | ||
2200 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2201 | return ret; | |
2202 | } | |
2203 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2204 | ||
2205 | static void cm_format_rej_event(struct cm_work *work) | |
2206 | { | |
2207 | struct cm_rej_msg *rej_msg; | |
2208 | struct ib_cm_rej_event_param *param; | |
2209 | ||
2210 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2211 | param = &work->cm_event.param.rej_rcvd; | |
2212 | param->ari = rej_msg->ari; | |
2213 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2214 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2215 | work->cm_event.private_data = &rej_msg->private_data; |
2216 | } | |
2217 | ||
2218 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2219 | { | |
2220 | struct cm_timewait_info *timewait_info; | |
2221 | struct cm_id_private *cm_id_priv; | |
97f52eb4 | 2222 | __be32 remote_id; |
a977049d HR |
2223 | |
2224 | remote_id = rej_msg->local_comm_id; | |
2225 | ||
97f52eb4 | 2226 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
24be6e81 | 2227 | spin_lock_irq(&cm.lock); |
97f52eb4 | 2228 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2229 | remote_id); |
2230 | if (!timewait_info) { | |
24be6e81 | 2231 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2232 | return NULL; |
2233 | } | |
f06d2653 SH |
2234 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2235 | (timewait_info->work.local_id ^ | |
2236 | cm.random_id_operand)); | |
a977049d HR |
2237 | if (cm_id_priv) { |
2238 | if (cm_id_priv->id.remote_id == remote_id) | |
2239 | atomic_inc(&cm_id_priv->refcount); | |
2240 | else | |
2241 | cm_id_priv = NULL; | |
2242 | } | |
24be6e81 | 2243 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2244 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
2245 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2246 | else | |
2247 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2248 | ||
2249 | return cm_id_priv; | |
2250 | } | |
2251 | ||
2252 | static int cm_rej_handler(struct cm_work *work) | |
2253 | { | |
2254 | struct cm_id_private *cm_id_priv; | |
2255 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
2256 | int ret; |
2257 | ||
2258 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2259 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2260 | if (!cm_id_priv) | |
2261 | return -EINVAL; | |
2262 | ||
2263 | cm_format_rej_event(work); | |
2264 | ||
24be6e81 | 2265 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2266 | switch (cm_id_priv->id.state) { |
2267 | case IB_CM_REQ_SENT: | |
2268 | case IB_CM_MRA_REQ_RCVD: | |
2269 | case IB_CM_REP_SENT: | |
2270 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2271 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2272 | /* fall through */ |
2273 | case IB_CM_REQ_RCVD: | |
2274 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2275 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2276 | cm_enter_timewait(cm_id_priv); |
2277 | else | |
2278 | cm_reset_to_idle(cm_id_priv); | |
2279 | break; | |
2280 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2281 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2282 | /* fall through */ |
2283 | case IB_CM_REP_RCVD: | |
2284 | case IB_CM_MRA_REP_SENT: | |
2285 | case IB_CM_ESTABLISHED: | |
2286 | cm_enter_timewait(cm_id_priv); | |
2287 | break; | |
2288 | default: | |
24be6e81 | 2289 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2290 | ret = -EINVAL; |
2291 | goto out; | |
2292 | } | |
2293 | ||
2294 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2295 | if (!ret) | |
2296 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2297 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2298 | |
2299 | if (ret) | |
2300 | cm_process_work(cm_id_priv, work); | |
2301 | else | |
2302 | cm_deref_id(cm_id_priv); | |
2303 | return 0; | |
2304 | out: | |
2305 | cm_deref_id(cm_id_priv); | |
2306 | return -EINVAL; | |
2307 | } | |
2308 | ||
2309 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2310 | u8 service_timeout, | |
2311 | const void *private_data, | |
2312 | u8 private_data_len) | |
2313 | { | |
2314 | struct cm_id_private *cm_id_priv; | |
2315 | struct ib_mad_send_buf *msg; | |
de98b693 SH |
2316 | enum ib_cm_state cm_state; |
2317 | enum ib_cm_lap_state lap_state; | |
2318 | enum cm_msg_response msg_response; | |
a977049d HR |
2319 | void *data; |
2320 | unsigned long flags; | |
2321 | int ret; | |
2322 | ||
2323 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2324 | return -EINVAL; | |
2325 | ||
2326 | data = cm_copy_private_data(private_data, private_data_len); | |
2327 | if (IS_ERR(data)) | |
2328 | return PTR_ERR(data); | |
2329 | ||
2330 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2331 | ||
2332 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2333 | switch(cm_id_priv->id.state) { | |
2334 | case IB_CM_REQ_RCVD: | |
de98b693 SH |
2335 | cm_state = IB_CM_MRA_REQ_SENT; |
2336 | lap_state = cm_id->lap_state; | |
2337 | msg_response = CM_MSG_RESPONSE_REQ; | |
a977049d HR |
2338 | break; |
2339 | case IB_CM_REP_RCVD: | |
de98b693 SH |
2340 | cm_state = IB_CM_MRA_REP_SENT; |
2341 | lap_state = cm_id->lap_state; | |
2342 | msg_response = CM_MSG_RESPONSE_REP; | |
a977049d HR |
2343 | break; |
2344 | case IB_CM_ESTABLISHED: | |
de98b693 SH |
2345 | cm_state = cm_id->state; |
2346 | lap_state = IB_CM_MRA_LAP_SENT; | |
2347 | msg_response = CM_MSG_RESPONSE_OTHER; | |
2348 | break; | |
2349 | default: | |
2350 | ret = -EINVAL; | |
2351 | goto error1; | |
2352 | } | |
2353 | ||
2354 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { | |
a977049d HR |
2355 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2356 | if (ret) | |
2357 | goto error1; | |
2358 | ||
2359 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
de98b693 | 2360 | msg_response, service_timeout, |
a977049d | 2361 | private_data, private_data_len); |
34816ad9 | 2362 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2363 | if (ret) |
2364 | goto error2; | |
a977049d | 2365 | } |
de98b693 SH |
2366 | |
2367 | cm_id->state = cm_state; | |
2368 | cm_id->lap_state = lap_state; | |
a977049d HR |
2369 | cm_id_priv->service_timeout = service_timeout; |
2370 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2371 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2372 | return 0; | |
2373 | ||
2374 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2375 | kfree(data); | |
2376 | return ret; | |
2377 | ||
2378 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2379 | kfree(data); | |
2380 | cm_free_msg(msg); | |
2381 | return ret; | |
2382 | } | |
2383 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2384 | ||
2385 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2386 | { | |
2387 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2388 | case CM_MSG_RESPONSE_REQ: | |
2389 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2390 | case CM_MSG_RESPONSE_REP: | |
2391 | case CM_MSG_RESPONSE_OTHER: | |
2392 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2393 | mra_msg->local_comm_id); | |
2394 | default: | |
2395 | return NULL; | |
2396 | } | |
2397 | } | |
2398 | ||
2399 | static int cm_mra_handler(struct cm_work *work) | |
2400 | { | |
2401 | struct cm_id_private *cm_id_priv; | |
2402 | struct cm_mra_msg *mra_msg; | |
a977049d HR |
2403 | int timeout, ret; |
2404 | ||
2405 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2406 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2407 | if (!cm_id_priv) | |
2408 | return -EINVAL; | |
2409 | ||
2410 | work->cm_event.private_data = &mra_msg->private_data; | |
2411 | work->cm_event.param.mra_rcvd.service_timeout = | |
2412 | cm_mra_get_service_timeout(mra_msg); | |
2413 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
1d846126 | 2414 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 2415 | |
24be6e81 | 2416 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2417 | switch (cm_id_priv->id.state) { |
2418 | case IB_CM_REQ_SENT: | |
2419 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2420 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2421 | cm_id_priv->msg, timeout)) |
a977049d HR |
2422 | goto out; |
2423 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2424 | break; | |
2425 | case IB_CM_REP_SENT: | |
2426 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2427 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2428 | cm_id_priv->msg, timeout)) |
a977049d HR |
2429 | goto out; |
2430 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2431 | break; | |
2432 | case IB_CM_ESTABLISHED: | |
2433 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2434 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2435 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
9af57b7a SH |
2436 | cm_id_priv->msg, timeout)) { |
2437 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2438 | atomic_long_inc(&work->port-> | |
2439 | counter_group[CM_RECV_DUPLICATES]. | |
2440 | counter[CM_MRA_COUNTER]); | |
a977049d | 2441 | goto out; |
9af57b7a | 2442 | } |
a977049d HR |
2443 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
2444 | break; | |
9af57b7a SH |
2445 | case IB_CM_MRA_REQ_RCVD: |
2446 | case IB_CM_MRA_REP_RCVD: | |
2447 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2448 | counter[CM_MRA_COUNTER]); | |
2449 | /* fall through */ | |
a977049d HR |
2450 | default: |
2451 | goto out; | |
2452 | } | |
2453 | ||
2454 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2455 | cm_id_priv->id.state; | |
2456 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2457 | if (!ret) | |
2458 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2459 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2460 | |
2461 | if (ret) | |
2462 | cm_process_work(cm_id_priv, work); | |
2463 | else | |
2464 | cm_deref_id(cm_id_priv); | |
2465 | return 0; | |
2466 | out: | |
24be6e81 | 2467 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2468 | cm_deref_id(cm_id_priv); |
2469 | return -EINVAL; | |
2470 | } | |
2471 | ||
2472 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2473 | struct cm_id_private *cm_id_priv, | |
2474 | struct ib_sa_path_rec *alternate_path, | |
2475 | const void *private_data, | |
2476 | u8 private_data_len) | |
2477 | { | |
2478 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2479 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2480 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2481 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2482 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2483 | /* todo: need remote CM response timeout */ | |
2484 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2485 | lap_msg->alt_local_lid = alternate_path->slid; | |
2486 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2487 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2488 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2489 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2490 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2491 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2492 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2493 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2494 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2495 | cm_lap_set_local_ack_timeout(lap_msg, | |
1d846126 SH |
2496 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
2497 | alternate_path->packet_life_time)); | |
a977049d HR |
2498 | |
2499 | if (private_data && private_data_len) | |
2500 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2501 | } | |
2502 | ||
2503 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2504 | struct ib_sa_path_rec *alternate_path, | |
2505 | const void *private_data, | |
2506 | u8 private_data_len) | |
2507 | { | |
2508 | struct cm_id_private *cm_id_priv; | |
2509 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2510 | unsigned long flags; |
2511 | int ret; | |
2512 | ||
2513 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2514 | return -EINVAL; | |
2515 | ||
2516 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2517 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2518 | if (cm_id->state != IB_CM_ESTABLISHED || | |
e1444b5a SH |
2519 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
2520 | cm_id->lap_state != IB_CM_LAP_IDLE)) { | |
a977049d HR |
2521 | ret = -EINVAL; |
2522 | goto out; | |
2523 | } | |
2524 | ||
e1444b5a SH |
2525 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
2526 | if (ret) | |
2527 | goto out; | |
1d846126 SH |
2528 | cm_id_priv->alt_av.timeout = |
2529 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2530 | cm_id_priv->alt_av.timeout - 1); | |
e1444b5a | 2531 | |
a977049d HR |
2532 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2533 | if (ret) | |
2534 | goto out; | |
2535 | ||
2536 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2537 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2538 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2539 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2540 | ||
34816ad9 | 2541 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2542 | if (ret) { |
2543 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2544 | cm_free_msg(msg); | |
2545 | return ret; | |
2546 | } | |
2547 | ||
2548 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2549 | cm_id_priv->msg = msg; | |
2550 | ||
2551 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2552 | return ret; | |
2553 | } | |
2554 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2555 | ||
e1444b5a SH |
2556 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
2557 | struct ib_sa_path_rec *path, | |
a977049d HR |
2558 | struct cm_lap_msg *lap_msg) |
2559 | { | |
2560 | memset(path, 0, sizeof *path); | |
2561 | path->dgid = lap_msg->alt_local_gid; | |
2562 | path->sgid = lap_msg->alt_remote_gid; | |
2563 | path->dlid = lap_msg->alt_local_lid; | |
2564 | path->slid = lap_msg->alt_remote_lid; | |
2565 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2566 | path->hop_limit = lap_msg->alt_hop_limit; | |
2567 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2568 | path->reversible = 1; | |
e1444b5a | 2569 | path->pkey = cm_id_priv->pkey; |
a977049d HR |
2570 | path->sl = cm_lap_get_sl(lap_msg); |
2571 | path->mtu_selector = IB_SA_EQ; | |
e1444b5a | 2572 | path->mtu = cm_id_priv->path_mtu; |
a977049d HR |
2573 | path->rate_selector = IB_SA_EQ; |
2574 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2575 | path->packet_life_time_selector = IB_SA_EQ; | |
2576 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2577 | path->packet_life_time -= (path->packet_life_time > 0); | |
2578 | } | |
2579 | ||
2580 | static int cm_lap_handler(struct cm_work *work) | |
2581 | { | |
2582 | struct cm_id_private *cm_id_priv; | |
2583 | struct cm_lap_msg *lap_msg; | |
2584 | struct ib_cm_lap_event_param *param; | |
2585 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2586 | int ret; |
2587 | ||
2588 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2589 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2590 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2591 | lap_msg->local_comm_id); | |
2592 | if (!cm_id_priv) | |
2593 | return -EINVAL; | |
2594 | ||
2595 | param = &work->cm_event.param.lap_rcvd; | |
2596 | param->alternate_path = &work->path[0]; | |
e1444b5a | 2597 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
a977049d HR |
2598 | work->cm_event.private_data = &lap_msg->private_data; |
2599 | ||
24be6e81 | 2600 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2601 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
2602 | goto unlock; | |
2603 | ||
2604 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 2605 | case IB_CM_LAP_UNINIT: |
a977049d HR |
2606 | case IB_CM_LAP_IDLE: |
2607 | break; | |
2608 | case IB_CM_MRA_LAP_SENT: | |
9af57b7a SH |
2609 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2610 | counter[CM_LAP_COUNTER]); | |
a977049d HR |
2611 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2612 | goto unlock; | |
2613 | ||
2614 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2615 | CM_MSG_RESPONSE_OTHER, | |
2616 | cm_id_priv->service_timeout, | |
2617 | cm_id_priv->private_data, | |
2618 | cm_id_priv->private_data_len); | |
24be6e81 | 2619 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2620 | |
34816ad9 | 2621 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2622 | cm_free_msg(msg); |
2623 | goto deref; | |
9af57b7a SH |
2624 | case IB_CM_LAP_RCVD: |
2625 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2626 | counter[CM_LAP_COUNTER]); | |
2627 | goto unlock; | |
a977049d HR |
2628 | default: |
2629 | goto unlock; | |
2630 | } | |
2631 | ||
2632 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2633 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e1444b5a SH |
2634 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2635 | work->mad_recv_wc->recv_buf.grh, | |
2636 | &cm_id_priv->av); | |
2637 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); | |
a977049d HR |
2638 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2639 | if (!ret) | |
2640 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2641 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2642 | |
2643 | if (ret) | |
2644 | cm_process_work(cm_id_priv, work); | |
2645 | else | |
2646 | cm_deref_id(cm_id_priv); | |
2647 | return 0; | |
2648 | ||
24be6e81 | 2649 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2650 | deref: cm_deref_id(cm_id_priv); |
2651 | return -EINVAL; | |
2652 | } | |
2653 | ||
2654 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2655 | struct cm_id_private *cm_id_priv, | |
2656 | enum ib_cm_apr_status status, | |
2657 | void *info, | |
2658 | u8 info_length, | |
2659 | const void *private_data, | |
2660 | u8 private_data_len) | |
2661 | { | |
2662 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2663 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2664 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2665 | apr_msg->ap_status = (u8) status; | |
2666 | ||
2667 | if (info && info_length) { | |
2668 | apr_msg->info_length = info_length; | |
2669 | memcpy(apr_msg->info, info, info_length); | |
2670 | } | |
2671 | ||
2672 | if (private_data && private_data_len) | |
2673 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2674 | } | |
2675 | ||
2676 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2677 | enum ib_cm_apr_status status, | |
2678 | void *info, | |
2679 | u8 info_length, | |
2680 | const void *private_data, | |
2681 | u8 private_data_len) | |
2682 | { | |
2683 | struct cm_id_private *cm_id_priv; | |
2684 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2685 | unsigned long flags; |
2686 | int ret; | |
2687 | ||
2688 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2689 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2690 | return -EINVAL; | |
2691 | ||
2692 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2693 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2694 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2695 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2696 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2697 | ret = -EINVAL; | |
2698 | goto out; | |
2699 | } | |
2700 | ||
2701 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2702 | if (ret) | |
2703 | goto out; | |
2704 | ||
2705 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2706 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2707 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2708 | if (ret) { |
2709 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2710 | cm_free_msg(msg); | |
2711 | return ret; | |
2712 | } | |
2713 | ||
2714 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2715 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2716 | return ret; | |
2717 | } | |
2718 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2719 | ||
2720 | static int cm_apr_handler(struct cm_work *work) | |
2721 | { | |
2722 | struct cm_id_private *cm_id_priv; | |
2723 | struct cm_apr_msg *apr_msg; | |
a977049d HR |
2724 | int ret; |
2725 | ||
2726 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2727 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2728 | apr_msg->local_comm_id); | |
2729 | if (!cm_id_priv) | |
2730 | return -EINVAL; /* Unmatched reply. */ | |
2731 | ||
2732 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2733 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2734 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2735 | work->cm_event.private_data = &apr_msg->private_data; | |
2736 | ||
24be6e81 | 2737 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2738 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
2739 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2740 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 2741 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2742 | goto out; |
2743 | } | |
2744 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2745 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2746 | cm_id_priv->msg = NULL; |
2747 | ||
2748 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2749 | if (!ret) | |
2750 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2751 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2752 | |
2753 | if (ret) | |
2754 | cm_process_work(cm_id_priv, work); | |
2755 | else | |
2756 | cm_deref_id(cm_id_priv); | |
2757 | return 0; | |
2758 | out: | |
2759 | cm_deref_id(cm_id_priv); | |
2760 | return -EINVAL; | |
2761 | } | |
2762 | ||
2763 | static int cm_timewait_handler(struct cm_work *work) | |
2764 | { | |
2765 | struct cm_timewait_info *timewait_info; | |
2766 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2767 | int ret; |
2768 | ||
2769 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2770 | spin_lock_irq(&cm.lock); |
2771 | list_del(&timewait_info->list); | |
2772 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2773 | |
2774 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2775 | timewait_info->work.remote_id); | |
2776 | if (!cm_id_priv) | |
2777 | return -EINVAL; | |
2778 | ||
8575329d | 2779 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2780 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2781 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2782 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2783 | goto out; |
2784 | } | |
2785 | cm_id_priv->id.state = IB_CM_IDLE; | |
2786 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2787 | if (!ret) | |
2788 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2789 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2790 | |
2791 | if (ret) | |
2792 | cm_process_work(cm_id_priv, work); | |
2793 | else | |
2794 | cm_deref_id(cm_id_priv); | |
2795 | return 0; | |
2796 | out: | |
2797 | cm_deref_id(cm_id_priv); | |
2798 | return -EINVAL; | |
2799 | } | |
2800 | ||
2801 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2802 | struct cm_id_private *cm_id_priv, | |
2803 | struct ib_cm_sidr_req_param *param) | |
2804 | { | |
2805 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2806 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2807 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
75af9088 | 2808 | sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
a977049d HR |
2809 | sidr_req_msg->service_id = param->service_id; |
2810 | ||
2811 | if (param->private_data && param->private_data_len) | |
2812 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2813 | param->private_data_len); | |
2814 | } | |
2815 | ||
2816 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2817 | struct ib_cm_sidr_req_param *param) | |
2818 | { | |
2819 | struct cm_id_private *cm_id_priv; | |
2820 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2821 | unsigned long flags; |
2822 | int ret; | |
2823 | ||
2824 | if (!param->path || (param->private_data && | |
2825 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2826 | return -EINVAL; | |
2827 | ||
2828 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2829 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2830 | if (ret) | |
2831 | goto out; | |
2832 | ||
2833 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2834 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2835 | cm_id_priv->timeout_ms = param->timeout_ms; |
2836 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2837 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2838 | if (ret) | |
2839 | goto out; | |
2840 | ||
2841 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2842 | param); | |
34816ad9 | 2843 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2844 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2845 | ||
2846 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2847 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2848 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2849 | else |
2850 | ret = -EINVAL; | |
2851 | ||
2852 | if (ret) { | |
2853 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2854 | cm_free_msg(msg); | |
2855 | goto out; | |
2856 | } | |
2857 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2858 | cm_id_priv->msg = msg; | |
2859 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2860 | out: | |
2861 | return ret; | |
2862 | } | |
2863 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2864 | ||
2865 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2866 | struct ib_cm_id *listen_id) | |
2867 | { | |
2868 | struct cm_sidr_req_msg *sidr_req_msg; | |
2869 | struct ib_cm_sidr_req_event_param *param; | |
2870 | ||
2871 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2872 | work->mad_recv_wc->recv_buf.mad; | |
2873 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2874 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2875 | param->listen_id = listen_id; |
a977049d HR |
2876 | param->port = work->port->port_num; |
2877 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2878 | } | |
2879 | ||
2880 | static int cm_sidr_req_handler(struct cm_work *work) | |
2881 | { | |
2882 | struct ib_cm_id *cm_id; | |
2883 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2884 | struct cm_sidr_req_msg *sidr_req_msg; | |
2885 | struct ib_wc *wc; | |
a977049d | 2886 | |
07d357d0 | 2887 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
2888 | if (IS_ERR(cm_id)) |
2889 | return PTR_ERR(cm_id); | |
2890 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2891 | ||
2892 | /* Record SGID/SLID and request ID for lookup. */ | |
2893 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2894 | work->mad_recv_wc->recv_buf.mad; | |
2895 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2896 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2897 | cm_id_priv->av.dgid.global.interface_id = 0; |
2898 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 2899 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
2900 | &cm_id_priv->av); |
2901 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
a977049d HR |
2902 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
2903 | atomic_inc(&cm_id_priv->work_count); | |
2904 | ||
24be6e81 | 2905 | spin_lock_irq(&cm.lock); |
a977049d HR |
2906 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
2907 | if (cur_cm_id_priv) { | |
24be6e81 | 2908 | spin_unlock_irq(&cm.lock); |
9af57b7a SH |
2909 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2910 | counter[CM_SIDR_REQ_COUNTER]); | |
a977049d HR |
2911 | goto out; /* Duplicate message. */ |
2912 | } | |
29c2731c | 2913 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
07d357d0 | 2914 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
2915 | sidr_req_msg->service_id, |
2916 | sidr_req_msg->private_data); | |
a977049d | 2917 | if (!cur_cm_id_priv) { |
24be6e81 | 2918 | spin_unlock_irq(&cm.lock); |
6164c8cd | 2919 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
a977049d HR |
2920 | goto out; /* No match. */ |
2921 | } | |
2922 | atomic_inc(&cur_cm_id_priv->refcount); | |
24be6e81 | 2923 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2924 | |
2925 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2926 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2927 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2928 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2929 | |
2930 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2931 | cm_process_work(cm_id_priv, work); | |
2932 | cm_deref_id(cur_cm_id_priv); | |
2933 | return 0; | |
2934 | out: | |
2935 | ib_destroy_cm_id(&cm_id_priv->id); | |
2936 | return -EINVAL; | |
2937 | } | |
2938 | ||
2939 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2940 | struct cm_id_private *cm_id_priv, | |
2941 | struct ib_cm_sidr_rep_param *param) | |
2942 | { | |
2943 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2944 | cm_id_priv->tid); | |
2945 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2946 | sidr_rep_msg->status = param->status; | |
2947 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2948 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2949 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2950 | ||
2951 | if (param->info && param->info_length) | |
2952 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2953 | ||
2954 | if (param->private_data && param->private_data_len) | |
2955 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2956 | param->private_data_len); | |
2957 | } | |
2958 | ||
2959 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
2960 | struct ib_cm_sidr_rep_param *param) | |
2961 | { | |
2962 | struct cm_id_private *cm_id_priv; | |
2963 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2964 | unsigned long flags; |
2965 | int ret; | |
2966 | ||
2967 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
2968 | (param->private_data && | |
2969 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
2970 | return -EINVAL; | |
2971 | ||
2972 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2973 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2974 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
2975 | ret = -EINVAL; | |
2976 | goto error; | |
2977 | } | |
2978 | ||
2979 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2980 | if (ret) | |
2981 | goto error; | |
2982 | ||
2983 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
2984 | param); | |
34816ad9 | 2985 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2986 | if (ret) { |
2987 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2988 | cm_free_msg(msg); | |
2989 | return ret; | |
2990 | } | |
2991 | cm_id->state = IB_CM_IDLE; | |
2992 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2993 | ||
2994 | spin_lock_irqsave(&cm.lock, flags); | |
2995 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
2996 | spin_unlock_irqrestore(&cm.lock, flags); | |
2997 | return 0; | |
2998 | ||
2999 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3000 | return ret; | |
3001 | } | |
3002 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
3003 | ||
3004 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
3005 | { | |
3006 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3007 | struct ib_cm_sidr_rep_event_param *param; | |
3008 | ||
3009 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3010 | work->mad_recv_wc->recv_buf.mad; | |
3011 | param = &work->cm_event.param.sidr_rep_rcvd; | |
3012 | param->status = sidr_rep_msg->status; | |
3013 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
3014 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
3015 | param->info = &sidr_rep_msg->info; | |
3016 | param->info_len = sidr_rep_msg->info_length; | |
3017 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
3018 | } | |
3019 | ||
3020 | static int cm_sidr_rep_handler(struct cm_work *work) | |
3021 | { | |
3022 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3023 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
3024 | |
3025 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3026 | work->mad_recv_wc->recv_buf.mad; | |
3027 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
3028 | if (!cm_id_priv) | |
3029 | return -EINVAL; /* Unmatched reply. */ | |
3030 | ||
24be6e81 | 3031 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 3032 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 3033 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3034 | goto out; |
3035 | } | |
3036 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 3037 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 3038 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3039 | |
3040 | cm_format_sidr_rep_event(work); | |
3041 | cm_process_work(cm_id_priv, work); | |
3042 | return 0; | |
3043 | out: | |
3044 | cm_deref_id(cm_id_priv); | |
3045 | return -EINVAL; | |
3046 | } | |
3047 | ||
3048 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
3049 | enum ib_wc_status wc_status) | |
3050 | { | |
3051 | struct cm_id_private *cm_id_priv; | |
3052 | struct ib_cm_event cm_event; | |
3053 | enum ib_cm_state state; | |
a977049d HR |
3054 | int ret; |
3055 | ||
3056 | memset(&cm_event, 0, sizeof cm_event); | |
3057 | cm_id_priv = msg->context[0]; | |
3058 | ||
3059 | /* Discard old sends or ones without a response. */ | |
24be6e81 | 3060 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3061 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
3062 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
3063 | goto discard; | |
3064 | ||
3065 | switch (state) { | |
3066 | case IB_CM_REQ_SENT: | |
3067 | case IB_CM_MRA_REQ_RCVD: | |
3068 | cm_reset_to_idle(cm_id_priv); | |
3069 | cm_event.event = IB_CM_REQ_ERROR; | |
3070 | break; | |
3071 | case IB_CM_REP_SENT: | |
3072 | case IB_CM_MRA_REP_RCVD: | |
3073 | cm_reset_to_idle(cm_id_priv); | |
3074 | cm_event.event = IB_CM_REP_ERROR; | |
3075 | break; | |
3076 | case IB_CM_DREQ_SENT: | |
3077 | cm_enter_timewait(cm_id_priv); | |
3078 | cm_event.event = IB_CM_DREQ_ERROR; | |
3079 | break; | |
3080 | case IB_CM_SIDR_REQ_SENT: | |
3081 | cm_id_priv->id.state = IB_CM_IDLE; | |
3082 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
3083 | break; | |
3084 | default: | |
3085 | goto discard; | |
3086 | } | |
24be6e81 | 3087 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3088 | cm_event.param.send_status = wc_status; |
3089 | ||
3090 | /* No other events can occur on the cm_id at this point. */ | |
3091 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
3092 | cm_free_msg(msg); | |
3093 | if (ret) | |
3094 | ib_destroy_cm_id(&cm_id_priv->id); | |
3095 | return; | |
3096 | discard: | |
24be6e81 | 3097 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3098 | cm_free_msg(msg); |
3099 | } | |
3100 | ||
3101 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
3102 | struct ib_mad_send_wc *mad_send_wc) | |
3103 | { | |
34816ad9 | 3104 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
9af57b7a SH |
3105 | struct cm_port *port; |
3106 | u16 attr_index; | |
3107 | ||
3108 | port = mad_agent->context; | |
3109 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) | |
3110 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; | |
3111 | ||
3112 | /* | |
3113 | * If the send was in response to a received message (context[0] is not | |
3114 | * set to a cm_id), and is not a REJ, then it is a send that was | |
3115 | * manually retried. | |
3116 | */ | |
3117 | if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) | |
3118 | msg->retries = 1; | |
3119 | ||
3120 | atomic_long_add(1 + msg->retries, | |
3121 | &port->counter_group[CM_XMIT].counter[attr_index]); | |
3122 | if (msg->retries) | |
3123 | atomic_long_add(msg->retries, | |
3124 | &port->counter_group[CM_XMIT_RETRIES]. | |
3125 | counter[attr_index]); | |
a977049d HR |
3126 | |
3127 | switch (mad_send_wc->status) { | |
3128 | case IB_WC_SUCCESS: | |
3129 | case IB_WC_WR_FLUSH_ERR: | |
3130 | cm_free_msg(msg); | |
3131 | break; | |
3132 | default: | |
3133 | if (msg->context[0] && msg->context[1]) | |
3134 | cm_process_send_error(msg, mad_send_wc->status); | |
3135 | else | |
3136 | cm_free_msg(msg); | |
3137 | break; | |
3138 | } | |
3139 | } | |
3140 | ||
c4028958 | 3141 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3142 | { |
c4028958 | 3143 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3144 | int ret; |
3145 | ||
3146 | switch (work->cm_event.event) { | |
3147 | case IB_CM_REQ_RECEIVED: | |
3148 | ret = cm_req_handler(work); | |
3149 | break; | |
3150 | case IB_CM_MRA_RECEIVED: | |
3151 | ret = cm_mra_handler(work); | |
3152 | break; | |
3153 | case IB_CM_REJ_RECEIVED: | |
3154 | ret = cm_rej_handler(work); | |
3155 | break; | |
3156 | case IB_CM_REP_RECEIVED: | |
3157 | ret = cm_rep_handler(work); | |
3158 | break; | |
3159 | case IB_CM_RTU_RECEIVED: | |
3160 | ret = cm_rtu_handler(work); | |
3161 | break; | |
3162 | case IB_CM_USER_ESTABLISHED: | |
3163 | ret = cm_establish_handler(work); | |
3164 | break; | |
3165 | case IB_CM_DREQ_RECEIVED: | |
3166 | ret = cm_dreq_handler(work); | |
3167 | break; | |
3168 | case IB_CM_DREP_RECEIVED: | |
3169 | ret = cm_drep_handler(work); | |
3170 | break; | |
3171 | case IB_CM_SIDR_REQ_RECEIVED: | |
3172 | ret = cm_sidr_req_handler(work); | |
3173 | break; | |
3174 | case IB_CM_SIDR_REP_RECEIVED: | |
3175 | ret = cm_sidr_rep_handler(work); | |
3176 | break; | |
3177 | case IB_CM_LAP_RECEIVED: | |
3178 | ret = cm_lap_handler(work); | |
3179 | break; | |
3180 | case IB_CM_APR_RECEIVED: | |
3181 | ret = cm_apr_handler(work); | |
3182 | break; | |
3183 | case IB_CM_TIMEWAIT_EXIT: | |
3184 | ret = cm_timewait_handler(work); | |
3185 | break; | |
3186 | default: | |
3187 | ret = -EINVAL; | |
3188 | break; | |
3189 | } | |
3190 | if (ret) | |
3191 | cm_free_work(work); | |
3192 | } | |
3193 | ||
e1444b5a | 3194 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3195 | { |
3196 | struct cm_id_private *cm_id_priv; | |
3197 | struct cm_work *work; | |
3198 | unsigned long flags; | |
3199 | int ret = 0; | |
3200 | ||
3201 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3202 | if (!work) | |
3203 | return -ENOMEM; | |
3204 | ||
3205 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3206 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3207 | switch (cm_id->state) | |
3208 | { | |
3209 | case IB_CM_REP_SENT: | |
3210 | case IB_CM_MRA_REP_RCVD: | |
3211 | cm_id->state = IB_CM_ESTABLISHED; | |
3212 | break; | |
3213 | case IB_CM_ESTABLISHED: | |
3214 | ret = -EISCONN; | |
3215 | break; | |
3216 | default: | |
3217 | ret = -EINVAL; | |
3218 | break; | |
3219 | } | |
3220 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3221 | ||
3222 | if (ret) { | |
3223 | kfree(work); | |
3224 | goto out; | |
3225 | } | |
3226 | ||
3227 | /* | |
3228 | * The CM worker thread may try to destroy the cm_id before it | |
3229 | * can execute this work item. To prevent potential deadlock, | |
3230 | * we need to find the cm_id once we're in the context of the | |
3231 | * worker thread, rather than holding a reference on it. | |
3232 | */ | |
c4028958 | 3233 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3234 | work->local_id = cm_id->local_id; |
3235 | work->remote_id = cm_id->remote_id; | |
3236 | work->mad_recv_wc = NULL; | |
3237 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
c4028958 | 3238 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3239 | out: |
3240 | return ret; | |
3241 | } | |
e1444b5a SH |
3242 | |
3243 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3244 | { | |
3245 | struct cm_id_private *cm_id_priv; | |
3246 | unsigned long flags; | |
3247 | int ret = 0; | |
3248 | ||
3249 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3250 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3251 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3252 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3253 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3254 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3255 | cm_id_priv->av = cm_id_priv->alt_av; | |
3256 | } else | |
3257 | ret = -EINVAL; | |
3258 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3259 | ||
3260 | return ret; | |
3261 | } | |
3262 | ||
3263 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3264 | { | |
3265 | int ret; | |
3266 | ||
3267 | switch (event) { | |
3268 | case IB_EVENT_COMM_EST: | |
3269 | ret = cm_establish(cm_id); | |
3270 | break; | |
3271 | case IB_EVENT_PATH_MIG: | |
3272 | ret = cm_migrate(cm_id); | |
3273 | break; | |
3274 | default: | |
3275 | ret = -EINVAL; | |
3276 | } | |
3277 | return ret; | |
3278 | } | |
3279 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3280 | |
3281 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3282 | struct ib_mad_recv_wc *mad_recv_wc) | |
3283 | { | |
9af57b7a | 3284 | struct cm_port *port = mad_agent->context; |
a977049d HR |
3285 | struct cm_work *work; |
3286 | enum ib_cm_event_type event; | |
9af57b7a | 3287 | u16 attr_id; |
a977049d HR |
3288 | int paths = 0; |
3289 | ||
3290 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3291 | case CM_REQ_ATTR_ID: | |
3292 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3293 | alt_local_lid != 0); | |
3294 | event = IB_CM_REQ_RECEIVED; | |
3295 | break; | |
3296 | case CM_MRA_ATTR_ID: | |
3297 | event = IB_CM_MRA_RECEIVED; | |
3298 | break; | |
3299 | case CM_REJ_ATTR_ID: | |
3300 | event = IB_CM_REJ_RECEIVED; | |
3301 | break; | |
3302 | case CM_REP_ATTR_ID: | |
3303 | event = IB_CM_REP_RECEIVED; | |
3304 | break; | |
3305 | case CM_RTU_ATTR_ID: | |
3306 | event = IB_CM_RTU_RECEIVED; | |
3307 | break; | |
3308 | case CM_DREQ_ATTR_ID: | |
3309 | event = IB_CM_DREQ_RECEIVED; | |
3310 | break; | |
3311 | case CM_DREP_ATTR_ID: | |
3312 | event = IB_CM_DREP_RECEIVED; | |
3313 | break; | |
3314 | case CM_SIDR_REQ_ATTR_ID: | |
3315 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3316 | break; | |
3317 | case CM_SIDR_REP_ATTR_ID: | |
3318 | event = IB_CM_SIDR_REP_RECEIVED; | |
3319 | break; | |
3320 | case CM_LAP_ATTR_ID: | |
3321 | paths = 1; | |
3322 | event = IB_CM_LAP_RECEIVED; | |
3323 | break; | |
3324 | case CM_APR_ATTR_ID: | |
3325 | event = IB_CM_APR_RECEIVED; | |
3326 | break; | |
3327 | default: | |
3328 | ib_free_recv_mad(mad_recv_wc); | |
3329 | return; | |
3330 | } | |
3331 | ||
9af57b7a SH |
3332 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
3333 | atomic_long_inc(&port->counter_group[CM_RECV]. | |
3334 | counter[attr_id - CM_ATTR_ID_OFFSET]); | |
3335 | ||
a977049d HR |
3336 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
3337 | GFP_KERNEL); | |
3338 | if (!work) { | |
3339 | ib_free_recv_mad(mad_recv_wc); | |
3340 | return; | |
3341 | } | |
3342 | ||
c4028958 | 3343 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3344 | work->cm_event.event = event; |
3345 | work->mad_recv_wc = mad_recv_wc; | |
9af57b7a | 3346 | work->port = port; |
c4028958 | 3347 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3348 | } |
3349 | ||
3350 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3351 | struct ib_qp_attr *qp_attr, | |
3352 | int *qp_attr_mask) | |
3353 | { | |
3354 | unsigned long flags; | |
3355 | int ret; | |
3356 | ||
3357 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3358 | switch (cm_id_priv->id.state) { | |
3359 | case IB_CM_REQ_SENT: | |
3360 | case IB_CM_MRA_REQ_RCVD: | |
3361 | case IB_CM_REQ_RCVD: | |
3362 | case IB_CM_MRA_REQ_SENT: | |
3363 | case IB_CM_REP_RCVD: | |
3364 | case IB_CM_MRA_REP_SENT: | |
3365 | case IB_CM_REP_SENT: | |
3366 | case IB_CM_MRA_REP_RCVD: | |
3367 | case IB_CM_ESTABLISHED: | |
3368 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3369 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 3370 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 3371 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3372 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3373 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3374 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3375 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3376 | ret = 0; | |
3377 | break; | |
3378 | default: | |
3379 | ret = -EINVAL; | |
3380 | break; | |
3381 | } | |
3382 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3383 | return ret; | |
3384 | } | |
3385 | ||
3386 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3387 | struct ib_qp_attr *qp_attr, | |
3388 | int *qp_attr_mask) | |
3389 | { | |
3390 | unsigned long flags; | |
3391 | int ret; | |
3392 | ||
3393 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3394 | switch (cm_id_priv->id.state) { | |
3395 | case IB_CM_REQ_RCVD: | |
3396 | case IB_CM_MRA_REQ_SENT: | |
3397 | case IB_CM_REP_RCVD: | |
3398 | case IB_CM_MRA_REP_SENT: | |
3399 | case IB_CM_REP_SENT: | |
3400 | case IB_CM_MRA_REP_RCVD: | |
3401 | case IB_CM_ESTABLISHED: | |
3402 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3403 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3404 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3405 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3406 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3407 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
ae7971a7 SH |
3408 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3409 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | | |
3410 | IB_QP_MIN_RNR_TIMER; | |
3411 | qp_attr->max_dest_rd_atomic = | |
3412 | cm_id_priv->responder_resources; | |
3413 | qp_attr->min_rnr_timer = 0; | |
3414 | } | |
a977049d HR |
3415 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3416 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3417 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 3418 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 3419 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
3420 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3421 | } | |
3422 | ret = 0; | |
3423 | break; | |
3424 | default: | |
3425 | ret = -EINVAL; | |
3426 | break; | |
3427 | } | |
3428 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3429 | return ret; | |
3430 | } | |
3431 | ||
3432 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3433 | struct ib_qp_attr *qp_attr, | |
3434 | int *qp_attr_mask) | |
3435 | { | |
3436 | unsigned long flags; | |
3437 | int ret; | |
3438 | ||
3439 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3440 | switch (cm_id_priv->id.state) { | |
0fe313b0 SH |
3441 | /* Allow transition to RTS before sending REP */ |
3442 | case IB_CM_REQ_RCVD: | |
3443 | case IB_CM_MRA_REQ_SENT: | |
3444 | ||
a977049d HR |
3445 | case IB_CM_REP_RCVD: |
3446 | case IB_CM_MRA_REP_SENT: | |
3447 | case IB_CM_REP_SENT: | |
3448 | case IB_CM_MRA_REP_RCVD: | |
3449 | case IB_CM_ESTABLISHED: | |
e1444b5a SH |
3450 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
3451 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
3452 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
3453 | if (cm_id_priv->qp_type == IB_QPT_RC) { | |
3454 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3455 | IB_QP_RNR_RETRY | | |
3456 | IB_QP_MAX_QP_RD_ATOMIC; | |
1d846126 | 3457 | qp_attr->timeout = cm_id_priv->av.timeout; |
e1444b5a SH |
3458 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
3459 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3460 | qp_attr->max_rd_atomic = | |
3461 | cm_id_priv->initiator_depth; | |
3462 | } | |
3463 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3464 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3465 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3466 | } | |
3467 | } else { | |
3468 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
3469 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; | |
3470 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; | |
1d846126 | 3471 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 3472 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
3473 | qp_attr->path_mig_state = IB_MIG_REARM; |
3474 | } | |
3475 | ret = 0; | |
3476 | break; | |
3477 | default: | |
3478 | ret = -EINVAL; | |
3479 | break; | |
3480 | } | |
3481 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3482 | return ret; | |
3483 | } | |
3484 | ||
3485 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3486 | struct ib_qp_attr *qp_attr, | |
3487 | int *qp_attr_mask) | |
3488 | { | |
3489 | struct cm_id_private *cm_id_priv; | |
3490 | int ret; | |
3491 | ||
3492 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3493 | switch (qp_attr->qp_state) { | |
3494 | case IB_QPS_INIT: | |
3495 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3496 | break; | |
3497 | case IB_QPS_RTR: | |
3498 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3499 | break; | |
3500 | case IB_QPS_RTS: | |
3501 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3502 | break; | |
3503 | default: | |
3504 | ret = -EINVAL; | |
3505 | break; | |
3506 | } | |
3507 | return ret; | |
3508 | } | |
3509 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3510 | ||
454a01e7 | 3511 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
1d846126 SH |
3512 | { |
3513 | struct ib_device_attr attr; | |
3514 | ||
3515 | if (ib_query_device(cm_dev->device, &attr)) | |
3516 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ | |
3517 | else | |
3518 | cm_dev->ack_delay = attr.local_ca_ack_delay; | |
3519 | } | |
3520 | ||
9af57b7a SH |
3521 | static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, |
3522 | char *buf) | |
3523 | { | |
3524 | struct cm_counter_group *group; | |
3525 | struct cm_counter_attribute *cm_attr; | |
3526 | ||
3527 | group = container_of(obj, struct cm_counter_group, obj); | |
3528 | cm_attr = container_of(attr, struct cm_counter_attribute, attr); | |
3529 | ||
3530 | return sprintf(buf, "%ld\n", | |
3531 | atomic_long_read(&group->counter[cm_attr->index])); | |
3532 | } | |
3533 | ||
3534 | static struct sysfs_ops cm_counter_ops = { | |
3535 | .show = cm_show_counter | |
3536 | }; | |
3537 | ||
3538 | static struct kobj_type cm_counter_obj_type = { | |
3539 | .sysfs_ops = &cm_counter_ops, | |
3540 | .default_attrs = cm_counter_default_attrs | |
3541 | }; | |
3542 | ||
3543 | static void cm_release_port_obj(struct kobject *obj) | |
3544 | { | |
3545 | struct cm_port *cm_port; | |
3546 | ||
3547 | printk(KERN_ERR "free cm port\n"); | |
3548 | ||
3549 | cm_port = container_of(obj, struct cm_port, port_obj); | |
3550 | kfree(cm_port); | |
3551 | } | |
3552 | ||
3553 | static struct kobj_type cm_port_obj_type = { | |
3554 | .release = cm_release_port_obj | |
3555 | }; | |
3556 | ||
3557 | static void cm_release_dev_obj(struct kobject *obj) | |
3558 | { | |
3559 | struct cm_device *cm_dev; | |
3560 | ||
3561 | printk(KERN_ERR "free cm dev\n"); | |
3562 | ||
3563 | cm_dev = container_of(obj, struct cm_device, dev_obj); | |
3564 | kfree(cm_dev); | |
3565 | } | |
3566 | ||
3567 | static struct kobj_type cm_dev_obj_type = { | |
3568 | .release = cm_release_dev_obj | |
3569 | }; | |
3570 | ||
3571 | struct class cm_class = { | |
3572 | .name = "infiniband_cm", | |
3573 | }; | |
3574 | EXPORT_SYMBOL(cm_class); | |
3575 | ||
3576 | static void cm_remove_fs_obj(struct kobject *obj) | |
3577 | { | |
3578 | kobject_put(obj->parent); | |
3579 | kobject_put(obj); | |
3580 | } | |
3581 | ||
3582 | static int cm_create_port_fs(struct cm_port *port) | |
3583 | { | |
3584 | int i, ret; | |
3585 | ||
3586 | ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, | |
3587 | kobject_get(&port->cm_dev->dev_obj), | |
3588 | "%d", port->port_num); | |
3589 | if (ret) { | |
3590 | kfree(port); | |
3591 | return ret; | |
3592 | } | |
3593 | ||
3594 | for (i = 0; i < CM_COUNTER_GROUPS; i++) { | |
3595 | ret = kobject_init_and_add(&port->counter_group[i].obj, | |
3596 | &cm_counter_obj_type, | |
3597 | kobject_get(&port->port_obj), | |
3598 | "%s", counter_group_names[i]); | |
3599 | if (ret) | |
3600 | goto error; | |
3601 | } | |
3602 | ||
3603 | return 0; | |
3604 | ||
3605 | error: | |
3606 | while (i--) | |
3607 | cm_remove_fs_obj(&port->counter_group[i].obj); | |
3608 | cm_remove_fs_obj(&port->port_obj); | |
3609 | return ret; | |
3610 | ||
3611 | } | |
3612 | ||
3613 | static void cm_remove_port_fs(struct cm_port *port) | |
3614 | { | |
3615 | int i; | |
3616 | ||
3617 | for (i = 0; i < CM_COUNTER_GROUPS; i++) | |
3618 | cm_remove_fs_obj(&port->counter_group[i].obj); | |
3619 | ||
3620 | cm_remove_fs_obj(&port->port_obj); | |
3621 | } | |
3622 | ||
a977049d HR |
3623 | static void cm_add_one(struct ib_device *device) |
3624 | { | |
3625 | struct cm_device *cm_dev; | |
3626 | struct cm_port *port; | |
3627 | struct ib_mad_reg_req reg_req = { | |
3628 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3629 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3630 | }; | |
3631 | struct ib_port_modify port_modify = { | |
3632 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3633 | }; | |
3634 | unsigned long flags; | |
3635 | int ret; | |
3636 | u8 i; | |
3637 | ||
07ebafba TT |
3638 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
3639 | return; | |
3640 | ||
9af57b7a | 3641 | cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * |
a977049d HR |
3642 | device->phys_port_cnt, GFP_KERNEL); |
3643 | if (!cm_dev) | |
3644 | return; | |
3645 | ||
3646 | cm_dev->device = device; | |
1d846126 | 3647 | cm_get_ack_delay(cm_dev); |
a977049d | 3648 | |
9af57b7a SH |
3649 | ret = kobject_init_and_add(&cm_dev->dev_obj, &cm_dev_obj_type, |
3650 | &cm_class.subsys.kobj, "%s", device->name); | |
3651 | if (ret) { | |
3652 | kfree(cm_dev); | |
3653 | return; | |
3654 | } | |
3655 | ||
a977049d HR |
3656 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
3657 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
9af57b7a SH |
3658 | port = kzalloc(sizeof *port, GFP_KERNEL); |
3659 | if (!port) | |
3660 | goto error1; | |
3661 | ||
3662 | cm_dev->port[i-1] = port; | |
a977049d HR |
3663 | port->cm_dev = cm_dev; |
3664 | port->port_num = i; | |
9af57b7a SH |
3665 | |
3666 | ret = cm_create_port_fs(port); | |
3667 | if (ret) | |
3668 | goto error1; | |
3669 | ||
a977049d HR |
3670 | port->mad_agent = ib_register_mad_agent(device, i, |
3671 | IB_QPT_GSI, | |
3672 | ®_req, | |
3673 | 0, | |
3674 | cm_send_handler, | |
3675 | cm_recv_handler, | |
3676 | port); | |
3677 | if (IS_ERR(port->mad_agent)) | |
9af57b7a | 3678 | goto error2; |
a977049d HR |
3679 | |
3680 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3681 | if (ret) | |
9af57b7a | 3682 | goto error3; |
a977049d HR |
3683 | } |
3684 | ib_set_client_data(device, &cm_client, cm_dev); | |
3685 | ||
3686 | write_lock_irqsave(&cm.device_lock, flags); | |
3687 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3688 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3689 | return; | |
3690 | ||
9af57b7a | 3691 | error3: |
cf311cd4 | 3692 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a SH |
3693 | error2: |
3694 | cm_remove_port_fs(port); | |
cf311cd4 | 3695 | error1: |
a977049d HR |
3696 | port_modify.set_port_cap_mask = 0; |
3697 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3698 | while (--i) { | |
9af57b7a | 3699 | port = cm_dev->port[i-1]; |
a977049d HR |
3700 | ib_modify_port(device, port->port_num, 0, &port_modify); |
3701 | ib_unregister_mad_agent(port->mad_agent); | |
9af57b7a | 3702 | cm_remove_port_fs(port); |
a977049d | 3703 | } |
9af57b7a | 3704 | cm_remove_fs_obj(&cm_dev->dev_obj); |
a977049d HR |
3705 | } |
3706 | ||
3707 | static void cm_remove_one(struct ib_device *device) | |
3708 | { | |
3709 | struct cm_device *cm_dev; | |
3710 | struct cm_port *port; | |
3711 | struct ib_port_modify port_modify = { | |
3712 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3713 | }; | |
3714 | unsigned long flags; | |
3715 | int i; | |
3716 | ||
3717 | cm_dev = ib_get_client_data(device, &cm_client); | |
3718 | if (!cm_dev) | |
3719 | return; | |
3720 | ||
3721 | write_lock_irqsave(&cm.device_lock, flags); | |
3722 | list_del(&cm_dev->list); | |
3723 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3724 | ||
3725 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
9af57b7a | 3726 | port = cm_dev->port[i-1]; |
a977049d HR |
3727 | ib_modify_port(device, port->port_num, 0, &port_modify); |
3728 | ib_unregister_mad_agent(port->mad_agent); | |
9af57b7a | 3729 | cm_remove_port_fs(port); |
a977049d | 3730 | } |
9af57b7a | 3731 | cm_remove_fs_obj(&cm_dev->dev_obj); |
a977049d HR |
3732 | } |
3733 | ||
3734 | static int __init ib_cm_init(void) | |
3735 | { | |
3736 | int ret; | |
3737 | ||
3738 | memset(&cm, 0, sizeof cm); | |
3739 | INIT_LIST_HEAD(&cm.device_list); | |
3740 | rwlock_init(&cm.device_lock); | |
3741 | spin_lock_init(&cm.lock); | |
3742 | cm.listen_service_table = RB_ROOT; | |
3743 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3744 | cm.remote_id_table = RB_ROOT; | |
3745 | cm.remote_qp_table = RB_ROOT; | |
3746 | cm.remote_sidr_table = RB_ROOT; | |
3747 | idr_init(&cm.local_id_table); | |
f06d2653 | 3748 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
a977049d | 3749 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
8575329d | 3750 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d | 3751 | |
9af57b7a SH |
3752 | ret = class_register(&cm_class); |
3753 | if (ret) | |
a977049d HR |
3754 | return -ENOMEM; |
3755 | ||
9af57b7a SH |
3756 | cm.wq = create_workqueue("ib_cm"); |
3757 | if (!cm.wq) { | |
3758 | ret = -ENOMEM; | |
3759 | goto error1; | |
3760 | } | |
3761 | ||
a977049d HR |
3762 | ret = ib_register_client(&cm_client); |
3763 | if (ret) | |
9af57b7a | 3764 | goto error2; |
a977049d HR |
3765 | |
3766 | return 0; | |
9af57b7a | 3767 | error2: |
a977049d | 3768 | destroy_workqueue(cm.wq); |
9af57b7a SH |
3769 | error1: |
3770 | class_unregister(&cm_class); | |
a977049d HR |
3771 | return ret; |
3772 | } | |
3773 | ||
3774 | static void __exit ib_cm_cleanup(void) | |
3775 | { | |
8575329d SH |
3776 | struct cm_timewait_info *timewait_info, *tmp; |
3777 | ||
3778 | spin_lock_irq(&cm.lock); | |
3779 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3780 | cancel_delayed_work(&timewait_info->work.work); | |
3781 | spin_unlock_irq(&cm.lock); | |
3782 | ||
a977049d | 3783 | destroy_workqueue(cm.wq); |
8575329d SH |
3784 | |
3785 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3786 | list_del(&timewait_info->list); | |
3787 | kfree(timewait_info); | |
3788 | } | |
3789 | ||
a977049d | 3790 | ib_unregister_client(&cm_client); |
9af57b7a | 3791 | class_unregister(&cm_class); |
5d7edb3c | 3792 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3793 | } |
3794 | ||
3795 | module_init(ib_cm_init); | |
3796 | module_exit(ib_cm_cleanup); | |
3797 |