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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 | 395 | |
1b90c137 | 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 | { | |
3971c9f6 SH |
977 | struct ib_sa_path_rec *pri_path = param->primary_path; |
978 | struct ib_sa_path_rec *alt_path = param->alternate_path; | |
979 | ||
a977049d HR |
980 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
981 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
982 | ||
983 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
984 | req_msg->service_id = param->service_id; | |
e971b8cd | 985 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d HR |
986 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
987 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
988 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
989 | cm_req_set_remote_resp_timeout(req_msg, | |
990 | param->remote_cm_response_timeout); | |
991 | cm_req_set_qp_type(req_msg, param->qp_type); | |
992 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
993 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
994 | cm_req_set_local_resp_timeout(req_msg, | |
995 | param->local_cm_response_timeout); | |
996 | cm_req_set_retry_count(req_msg, param->retry_count); | |
997 | req_msg->pkey = param->primary_path->pkey; | |
998 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
999 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
1000 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
1001 | cm_req_set_srq(req_msg, param->srq); | |
1002 | ||
3971c9f6 SH |
1003 | if (pri_path->hop_limit <= 1) { |
1004 | req_msg->primary_local_lid = pri_path->slid; | |
1005 | req_msg->primary_remote_lid = pri_path->dlid; | |
1006 | } else { | |
1007 | /* Work-around until there's a way to obtain remote LID info */ | |
1008 | req_msg->primary_local_lid = IB_LID_PERMISSIVE; | |
1009 | req_msg->primary_remote_lid = IB_LID_PERMISSIVE; | |
1010 | } | |
1011 | req_msg->primary_local_gid = pri_path->sgid; | |
1012 | req_msg->primary_remote_gid = pri_path->dgid; | |
1013 | cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); | |
1014 | cm_req_set_primary_packet_rate(req_msg, pri_path->rate); | |
1015 | req_msg->primary_traffic_class = pri_path->traffic_class; | |
1016 | req_msg->primary_hop_limit = pri_path->hop_limit; | |
1017 | cm_req_set_primary_sl(req_msg, pri_path->sl); | |
1018 | cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); | |
a977049d | 1019 | cm_req_set_primary_local_ack_timeout(req_msg, |
1d846126 | 1020 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1021 | pri_path->packet_life_time)); |
a977049d | 1022 | |
3971c9f6 SH |
1023 | if (alt_path) { |
1024 | if (alt_path->hop_limit <= 1) { | |
1025 | req_msg->alt_local_lid = alt_path->slid; | |
1026 | req_msg->alt_remote_lid = alt_path->dlid; | |
1027 | } else { | |
1028 | req_msg->alt_local_lid = IB_LID_PERMISSIVE; | |
1029 | req_msg->alt_remote_lid = IB_LID_PERMISSIVE; | |
1030 | } | |
1031 | req_msg->alt_local_gid = alt_path->sgid; | |
1032 | req_msg->alt_remote_gid = alt_path->dgid; | |
a977049d | 1033 | cm_req_set_alt_flow_label(req_msg, |
3971c9f6 SH |
1034 | alt_path->flow_label); |
1035 | cm_req_set_alt_packet_rate(req_msg, alt_path->rate); | |
1036 | req_msg->alt_traffic_class = alt_path->traffic_class; | |
1037 | req_msg->alt_hop_limit = alt_path->hop_limit; | |
1038 | cm_req_set_alt_sl(req_msg, alt_path->sl); | |
1039 | cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); | |
a977049d | 1040 | cm_req_set_alt_local_ack_timeout(req_msg, |
1d846126 | 1041 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1042 | alt_path->packet_life_time)); |
a977049d HR |
1043 | } |
1044 | ||
1045 | if (param->private_data && param->private_data_len) | |
1046 | memcpy(req_msg->private_data, param->private_data, | |
1047 | param->private_data_len); | |
1048 | } | |
1049 | ||
858119e1 | 1050 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
1051 | { |
1052 | /* peer-to-peer not supported */ | |
1053 | if (param->peer_to_peer) | |
1054 | return -EINVAL; | |
1055 | ||
1056 | if (!param->primary_path) | |
1057 | return -EINVAL; | |
1058 | ||
1059 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
1060 | return -EINVAL; | |
1061 | ||
1062 | if (param->private_data && | |
1063 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
1064 | return -EINVAL; | |
1065 | ||
1066 | if (param->alternate_path && | |
1067 | (param->alternate_path->pkey != param->primary_path->pkey || | |
1068 | param->alternate_path->mtu != param->primary_path->mtu)) | |
1069 | return -EINVAL; | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
1075 | struct ib_cm_req_param *param) | |
1076 | { | |
1077 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1078 | struct cm_req_msg *req_msg; |
1079 | unsigned long flags; | |
1080 | int ret; | |
1081 | ||
1082 | ret = cm_validate_req_param(param); | |
1083 | if (ret) | |
1084 | return ret; | |
1085 | ||
1086 | /* Verify that we're not in timewait. */ | |
1087 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1088 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1089 | if (cm_id->state != IB_CM_IDLE) { | |
1090 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1091 | ret = -EINVAL; | |
1092 | goto out; | |
1093 | } | |
1094 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1095 | ||
1096 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1097 | id.local_id); | |
75df23e2 SH |
1098 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1099 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 1100 | goto out; |
75df23e2 | 1101 | } |
a977049d HR |
1102 | |
1103 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
1104 | if (ret) | |
1105 | goto error1; | |
1106 | if (param->alternate_path) { | |
1107 | ret = cm_init_av_by_path(param->alternate_path, | |
1108 | &cm_id_priv->alt_av); | |
1109 | if (ret) | |
1110 | goto error1; | |
1111 | } | |
1112 | cm_id->service_id = param->service_id; | |
97f52eb4 | 1113 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1114 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1115 | param->primary_path->packet_life_time) * 2 + | |
1116 | cm_convert_to_ms( | |
1117 | param->remote_cm_response_timeout); | |
1118 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1119 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1120 | cm_id_priv->responder_resources = param->responder_resources; | |
1121 | cm_id_priv->retry_count = param->retry_count; | |
1122 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1123 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1124 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1125 | |
1126 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1127 | if (ret) | |
1128 | goto error1; | |
1129 | ||
1130 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1131 | cm_format_req(req_msg, cm_id_priv, param); | |
1132 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1133 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1134 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1135 | ||
1136 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1137 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
a977049d HR |
1138 | |
1139 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1140 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1141 | if (ret) { |
1142 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1143 | goto error2; | |
1144 | } | |
1145 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1146 | cm_id->state = IB_CM_REQ_SENT; | |
1147 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1148 | return 0; | |
1149 | ||
1150 | error2: cm_free_msg(cm_id_priv->msg); | |
1151 | error1: kfree(cm_id_priv->timewait_info); | |
1152 | out: return ret; | |
1153 | } | |
1154 | EXPORT_SYMBOL(ib_send_cm_req); | |
1155 | ||
1156 | static int cm_issue_rej(struct cm_port *port, | |
1157 | struct ib_mad_recv_wc *mad_recv_wc, | |
1158 | enum ib_cm_rej_reason reason, | |
1159 | enum cm_msg_response msg_rejected, | |
1160 | void *ari, u8 ari_length) | |
1161 | { | |
1162 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1163 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1164 | int ret; | |
1165 | ||
1166 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1167 | if (ret) | |
1168 | return ret; | |
1169 | ||
1170 | /* We just need common CM header information. Cast to any message. */ | |
1171 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1172 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1173 | ||
1174 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1175 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1176 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1177 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1178 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1179 | |
1180 | if (ari && ari_length) { | |
1181 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1182 | memcpy(rej_msg->ari, ari, ari_length); | |
1183 | } | |
1184 | ||
34816ad9 | 1185 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1186 | if (ret) |
1187 | cm_free_msg(msg); | |
1188 | ||
1189 | return ret; | |
1190 | } | |
1191 | ||
97f52eb4 SH |
1192 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1193 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1194 | { |
1195 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1196 | ((local_ca_guid == remote_ca_guid) && | |
1197 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1198 | } | |
1199 | ||
858119e1 | 1200 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1201 | struct ib_sa_path_rec *primary_path, |
1202 | struct ib_sa_path_rec *alt_path) | |
1203 | { | |
1204 | memset(primary_path, 0, sizeof *primary_path); | |
1205 | primary_path->dgid = req_msg->primary_local_gid; | |
1206 | primary_path->sgid = req_msg->primary_remote_gid; | |
1207 | primary_path->dlid = req_msg->primary_local_lid; | |
1208 | primary_path->slid = req_msg->primary_remote_lid; | |
1209 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1210 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1211 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1212 | primary_path->reversible = 1; | |
1213 | primary_path->pkey = req_msg->pkey; | |
1214 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1215 | primary_path->mtu_selector = IB_SA_EQ; | |
1216 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1217 | primary_path->rate_selector = IB_SA_EQ; | |
1218 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1219 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1220 | primary_path->packet_life_time = | |
1221 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1222 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1223 | ||
1224 | if (req_msg->alt_local_lid) { | |
1225 | memset(alt_path, 0, sizeof *alt_path); | |
1226 | alt_path->dgid = req_msg->alt_local_gid; | |
1227 | alt_path->sgid = req_msg->alt_remote_gid; | |
1228 | alt_path->dlid = req_msg->alt_local_lid; | |
1229 | alt_path->slid = req_msg->alt_remote_lid; | |
1230 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1231 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1232 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1233 | alt_path->reversible = 1; | |
1234 | alt_path->pkey = req_msg->pkey; | |
1235 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1236 | alt_path->mtu_selector = IB_SA_EQ; | |
1237 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1238 | alt_path->rate_selector = IB_SA_EQ; | |
1239 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1240 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1241 | alt_path->packet_life_time = | |
1242 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1243 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | static void cm_format_req_event(struct cm_work *work, | |
1248 | struct cm_id_private *cm_id_priv, | |
1249 | struct ib_cm_id *listen_id) | |
1250 | { | |
1251 | struct cm_req_msg *req_msg; | |
1252 | struct ib_cm_req_event_param *param; | |
1253 | ||
1254 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1255 | param = &work->cm_event.param.req_rcvd; | |
1256 | param->listen_id = listen_id; | |
a977049d HR |
1257 | param->port = cm_id_priv->av.port->port_num; |
1258 | param->primary_path = &work->path[0]; | |
1259 | if (req_msg->alt_local_lid) | |
1260 | param->alternate_path = &work->path[1]; | |
1261 | else | |
1262 | param->alternate_path = NULL; | |
1263 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1264 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1265 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1266 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1267 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1268 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1269 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1270 | param->local_cm_response_timeout = | |
1271 | cm_req_get_remote_resp_timeout(req_msg); | |
1272 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1273 | param->remote_cm_response_timeout = | |
1274 | cm_req_get_local_resp_timeout(req_msg); | |
1275 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1276 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1277 | param->srq = cm_req_get_srq(req_msg); | |
1278 | work->cm_event.private_data = &req_msg->private_data; | |
1279 | } | |
1280 | ||
1281 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1282 | struct cm_work *work) | |
1283 | { | |
a977049d HR |
1284 | int ret; |
1285 | ||
1286 | /* We will typically only have the current event to report. */ | |
1287 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1288 | cm_free_work(work); | |
1289 | ||
1290 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1291 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1292 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1293 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1294 | BUG_ON(!work); |
1295 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1296 | &work->cm_event); | |
1297 | cm_free_work(work); | |
1298 | } | |
1299 | cm_deref_id(cm_id_priv); | |
1300 | if (ret) | |
04c33543 | 1301 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1302 | } |
1303 | ||
1304 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1305 | struct cm_id_private *cm_id_priv, | |
1306 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1307 | const void *private_data, u8 private_data_len) | |
1308 | { | |
1309 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1310 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1311 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1312 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1313 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1314 | ||
1315 | if (private_data && private_data_len) | |
1316 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1317 | } | |
1318 | ||
1319 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1320 | struct cm_id_private *cm_id_priv, | |
1321 | enum ib_cm_rej_reason reason, | |
1322 | void *ari, | |
1323 | u8 ari_length, | |
1324 | const void *private_data, | |
1325 | u8 private_data_len) | |
1326 | { | |
1327 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1328 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1329 | ||
1330 | switch(cm_id_priv->id.state) { | |
1331 | case IB_CM_REQ_RCVD: | |
1332 | rej_msg->local_comm_id = 0; | |
1333 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1334 | break; | |
1335 | case IB_CM_MRA_REQ_SENT: | |
1336 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1337 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1338 | break; | |
1339 | case IB_CM_REP_RCVD: | |
1340 | case IB_CM_MRA_REP_SENT: | |
1341 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1342 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1343 | break; | |
1344 | default: | |
1345 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1346 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1347 | break; | |
1348 | } | |
1349 | ||
97f52eb4 | 1350 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1351 | if (ari && ari_length) { |
1352 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1353 | memcpy(rej_msg->ari, ari, ari_length); | |
1354 | } | |
1355 | ||
1356 | if (private_data && private_data_len) | |
1357 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1358 | } | |
1359 | ||
1360 | static void cm_dup_req_handler(struct cm_work *work, | |
1361 | struct cm_id_private *cm_id_priv) | |
1362 | { | |
1363 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1364 | int ret; |
1365 | ||
9af57b7a SH |
1366 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1367 | counter[CM_REQ_COUNTER]); | |
1368 | ||
a977049d HR |
1369 | /* Quick state check to discard duplicate REQs. */ |
1370 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1371 | return; | |
1372 | ||
1373 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1374 | if (ret) | |
1375 | return; | |
1376 | ||
24be6e81 | 1377 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1378 | switch (cm_id_priv->id.state) { |
1379 | case IB_CM_MRA_REQ_SENT: | |
1380 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1381 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1382 | cm_id_priv->private_data, | |
1383 | cm_id_priv->private_data_len); | |
1384 | break; | |
1385 | case IB_CM_TIMEWAIT: | |
1386 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1387 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1388 | break; | |
1389 | default: | |
1390 | goto unlock; | |
1391 | } | |
24be6e81 | 1392 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1393 | |
34816ad9 | 1394 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1395 | if (ret) |
1396 | goto free; | |
1397 | return; | |
1398 | ||
24be6e81 | 1399 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1400 | free: cm_free_msg(msg); |
1401 | } | |
1402 | ||
1403 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1404 | struct cm_id_private *cm_id_priv) | |
1405 | { | |
1406 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1407 | struct cm_timewait_info *timewait_info; | |
1408 | struct cm_req_msg *req_msg; | |
a977049d HR |
1409 | |
1410 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1411 | ||
d998ccce | 1412 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1413 | spin_lock_irq(&cm.lock); |
a977049d | 1414 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d HR |
1415 | if (timewait_info) { |
1416 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1417 | timewait_info->work.remote_id); | |
24be6e81 | 1418 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1419 | if (cur_cm_id_priv) { |
1420 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1421 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1422 | } |
1423 | return NULL; | |
1424 | } | |
1425 | ||
1426 | /* Check for stale connections. */ | |
1427 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1428 | if (timewait_info) { | |
1429 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
24be6e81 | 1430 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1431 | cm_issue_rej(work->port, work->mad_recv_wc, |
1432 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1433 | NULL, 0); | |
1434 | return NULL; | |
a977049d HR |
1435 | } |
1436 | ||
1437 | /* Find matching listen request. */ | |
07d357d0 | 1438 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1439 | req_msg->service_id, |
1440 | req_msg->private_data); | |
a977049d | 1441 | if (!listen_cm_id_priv) { |
8575329d | 1442 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
24be6e81 | 1443 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1444 | cm_issue_rej(work->port, work->mad_recv_wc, |
1445 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1446 | NULL, 0); | |
8575329d | 1447 | goto out; |
a977049d HR |
1448 | } |
1449 | atomic_inc(&listen_cm_id_priv->refcount); | |
1450 | atomic_inc(&cm_id_priv->refcount); | |
1451 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1452 | atomic_inc(&cm_id_priv->work_count); | |
24be6e81 | 1453 | spin_unlock_irq(&cm.lock); |
8575329d | 1454 | out: |
a977049d | 1455 | return listen_cm_id_priv; |
a977049d HR |
1456 | } |
1457 | ||
3971c9f6 SH |
1458 | /* |
1459 | * Work-around for inter-subnet connections. If the LIDs are permissive, | |
1460 | * we need to override the LID/SL data in the REQ with the LID information | |
1461 | * in the work completion. | |
1462 | */ | |
1463 | static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) | |
1464 | { | |
1465 | if (!cm_req_get_primary_subnet_local(req_msg)) { | |
1466 | if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { | |
1467 | req_msg->primary_local_lid = cpu_to_be16(wc->slid); | |
1468 | cm_req_set_primary_sl(req_msg, wc->sl); | |
1469 | } | |
1470 | ||
1471 | if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) | |
1472 | req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1473 | } | |
1474 | ||
1475 | if (!cm_req_get_alt_subnet_local(req_msg)) { | |
1476 | if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { | |
1477 | req_msg->alt_local_lid = cpu_to_be16(wc->slid); | |
1478 | cm_req_set_alt_sl(req_msg, wc->sl); | |
1479 | } | |
1480 | ||
1481 | if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) | |
1482 | req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1483 | } | |
1484 | } | |
1485 | ||
a977049d HR |
1486 | static int cm_req_handler(struct cm_work *work) |
1487 | { | |
1488 | struct ib_cm_id *cm_id; | |
1489 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1490 | struct cm_req_msg *req_msg; | |
1491 | int ret; | |
1492 | ||
1493 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1494 | ||
07d357d0 | 1495 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
1496 | if (IS_ERR(cm_id)) |
1497 | return PTR_ERR(cm_id); | |
1498 | ||
1499 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1500 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1501 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1502 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1503 | &cm_id_priv->av); |
1504 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1505 | id.local_id); | |
1506 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1507 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1508 | goto destroy; |
a977049d HR |
1509 | } |
1510 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1511 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1512 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1513 | ||
1514 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1515 | if (!listen_cm_id_priv) { | |
1516 | ret = -EINVAL; | |
76842405 SH |
1517 | kfree(cm_id_priv->timewait_info); |
1518 | goto destroy; | |
a977049d HR |
1519 | } |
1520 | ||
1521 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1522 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1523 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1524 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d | 1525 | |
3971c9f6 | 1526 | cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
a977049d HR |
1527 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
1528 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
76842405 SH |
1529 | if (ret) { |
1530 | ib_get_cached_gid(work->port->cm_dev->device, | |
1531 | work->port->port_num, 0, &work->path[0].sgid); | |
1532 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1533 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1534 | NULL, 0); | |
1535 | goto rejected; | |
1536 | } | |
a977049d HR |
1537 | if (req_msg->alt_local_lid) { |
1538 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1539 | if (ret) { |
1540 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1541 | &work->path[0].sgid, | |
1542 | sizeof work->path[0].sgid, NULL, 0); | |
1543 | goto rejected; | |
1544 | } | |
a977049d HR |
1545 | } |
1546 | cm_id_priv->tid = req_msg->hdr.tid; | |
1547 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1548 | cm_req_get_local_resp_timeout(req_msg)); | |
1549 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1550 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1551 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1552 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1553 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
e1444b5a | 1554 | cm_id_priv->pkey = req_msg->pkey; |
a977049d | 1555 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
a977049d HR |
1556 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
1557 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1558 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1559 | |
1560 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1561 | cm_process_work(cm_id_priv, work); | |
1562 | cm_deref_id(listen_cm_id_priv); | |
1563 | return 0; | |
1564 | ||
76842405 SH |
1565 | rejected: |
1566 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1567 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1568 | destroy: |
1569 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1570 | return ret; |
1571 | } | |
1572 | ||
1573 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1574 | struct cm_id_private *cm_id_priv, | |
1575 | struct ib_cm_rep_param *param) | |
1576 | { | |
1577 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1578 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1579 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1580 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1581 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1582 | rep_msg->resp_resources = param->responder_resources; | |
1583 | rep_msg->initiator_depth = param->initiator_depth; | |
1d846126 SH |
1584 | cm_rep_set_target_ack_delay(rep_msg, |
1585 | cm_id_priv->av.port->cm_dev->ack_delay); | |
a977049d HR |
1586 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
1587 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1588 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1589 | cm_rep_set_srq(rep_msg, param->srq); | |
e971b8cd | 1590 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d HR |
1591 | |
1592 | if (param->private_data && param->private_data_len) | |
1593 | memcpy(rep_msg->private_data, param->private_data, | |
1594 | param->private_data_len); | |
1595 | } | |
1596 | ||
1597 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1598 | struct ib_cm_rep_param *param) | |
1599 | { | |
1600 | struct cm_id_private *cm_id_priv; | |
1601 | struct ib_mad_send_buf *msg; | |
1602 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1603 | unsigned long flags; |
1604 | int ret; | |
1605 | ||
1606 | if (param->private_data && | |
1607 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1608 | return -EINVAL; | |
1609 | ||
1610 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1611 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1612 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1613 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1614 | ret = -EINVAL; | |
1615 | goto out; | |
1616 | } | |
1617 | ||
1618 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1619 | if (ret) | |
1620 | goto out; | |
1621 | ||
1622 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1623 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1624 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1625 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1626 | ||
34816ad9 | 1627 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1628 | if (ret) { |
1629 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1630 | cm_free_msg(msg); | |
1631 | return ret; | |
1632 | } | |
1633 | ||
1634 | cm_id->state = IB_CM_REP_SENT; | |
1635 | cm_id_priv->msg = msg; | |
1636 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1637 | cm_id_priv->responder_resources = param->responder_resources; | |
1638 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1639 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1640 | ||
1641 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1642 | return ret; | |
1643 | } | |
1644 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1645 | ||
1646 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1647 | struct cm_id_private *cm_id_priv, | |
1648 | const void *private_data, | |
1649 | u8 private_data_len) | |
1650 | { | |
1651 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1652 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1653 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1654 | ||
1655 | if (private_data && private_data_len) | |
1656 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1657 | } | |
1658 | ||
1659 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1660 | const void *private_data, | |
1661 | u8 private_data_len) | |
1662 | { | |
1663 | struct cm_id_private *cm_id_priv; | |
1664 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1665 | unsigned long flags; |
1666 | void *data; | |
1667 | int ret; | |
1668 | ||
1669 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1670 | return -EINVAL; | |
1671 | ||
1672 | data = cm_copy_private_data(private_data, private_data_len); | |
1673 | if (IS_ERR(data)) | |
1674 | return PTR_ERR(data); | |
1675 | ||
1676 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1677 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1678 | if (cm_id->state != IB_CM_REP_RCVD && | |
1679 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1680 | ret = -EINVAL; | |
1681 | goto error; | |
1682 | } | |
1683 | ||
1684 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1685 | if (ret) | |
1686 | goto error; | |
1687 | ||
1688 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1689 | private_data, private_data_len); | |
1690 | ||
34816ad9 | 1691 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1692 | if (ret) { |
1693 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1694 | cm_free_msg(msg); | |
1695 | kfree(data); | |
1696 | return ret; | |
1697 | } | |
1698 | ||
1699 | cm_id->state = IB_CM_ESTABLISHED; | |
1700 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1701 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1702 | return 0; | |
1703 | ||
1704 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1705 | kfree(data); | |
1706 | return ret; | |
1707 | } | |
1708 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1709 | ||
1710 | static void cm_format_rep_event(struct cm_work *work) | |
1711 | { | |
1712 | struct cm_rep_msg *rep_msg; | |
1713 | struct ib_cm_rep_event_param *param; | |
1714 | ||
1715 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1716 | param = &work->cm_event.param.rep_rcvd; | |
1717 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1718 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1719 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1720 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1721 | param->responder_resources = rep_msg->initiator_depth; | |
1722 | param->initiator_depth = rep_msg->resp_resources; | |
1723 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1724 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1725 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1726 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1727 | param->srq = cm_rep_get_srq(rep_msg); | |
1728 | work->cm_event.private_data = &rep_msg->private_data; | |
1729 | } | |
1730 | ||
1731 | static void cm_dup_rep_handler(struct cm_work *work) | |
1732 | { | |
1733 | struct cm_id_private *cm_id_priv; | |
1734 | struct cm_rep_msg *rep_msg; | |
1735 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1736 | int ret; |
1737 | ||
1738 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1739 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1740 | rep_msg->local_comm_id); | |
1741 | if (!cm_id_priv) | |
1742 | return; | |
1743 | ||
9af57b7a SH |
1744 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1745 | counter[CM_REP_COUNTER]); | |
a977049d HR |
1746 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
1747 | if (ret) | |
1748 | goto deref; | |
1749 | ||
24be6e81 | 1750 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1751 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
1752 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1753 | cm_id_priv->private_data, | |
1754 | cm_id_priv->private_data_len); | |
1755 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1756 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1757 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1758 | cm_id_priv->private_data, | |
1759 | cm_id_priv->private_data_len); | |
1760 | else | |
1761 | goto unlock; | |
24be6e81 | 1762 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1763 | |
34816ad9 | 1764 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1765 | if (ret) |
1766 | goto free; | |
1767 | goto deref; | |
1768 | ||
24be6e81 | 1769 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1770 | free: cm_free_msg(msg); |
1771 | deref: cm_deref_id(cm_id_priv); | |
1772 | } | |
1773 | ||
1774 | static int cm_rep_handler(struct cm_work *work) | |
1775 | { | |
1776 | struct cm_id_private *cm_id_priv; | |
1777 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1778 | int ret; |
1779 | ||
1780 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1781 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1782 | if (!cm_id_priv) { | |
1783 | cm_dup_rep_handler(work); | |
1784 | return -EINVAL; | |
1785 | } | |
1786 | ||
87fd1a11 SH |
1787 | cm_format_rep_event(work); |
1788 | ||
24be6e81 | 1789 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1790 | switch (cm_id_priv->id.state) { |
1791 | case IB_CM_REQ_SENT: | |
1792 | case IB_CM_MRA_REQ_RCVD: | |
1793 | break; | |
1794 | default: | |
24be6e81 | 1795 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1796 | ret = -EINVAL; |
1797 | goto error; | |
1798 | } | |
1799 | ||
a977049d HR |
1800 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1801 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1802 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1803 | ||
87fd1a11 | 1804 | spin_lock(&cm.lock); |
a977049d HR |
1805 | /* Check for duplicate REP. */ |
1806 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 1807 | spin_unlock(&cm.lock); |
24be6e81 | 1808 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1809 | ret = -EINVAL; |
1810 | goto error; | |
1811 | } | |
1812 | /* Check for a stale connection. */ | |
1813 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1814 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1815 | &cm.remote_id_table); | |
1816 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1817 | spin_unlock(&cm.lock); | |
24be6e81 | 1818 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1819 | cm_issue_rej(work->port, work->mad_recv_wc, |
1820 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1821 | NULL, 0); | |
1822 | ret = -EINVAL; | |
1823 | goto error; | |
1824 | } | |
87fd1a11 | 1825 | spin_unlock(&cm.lock); |
a977049d | 1826 | |
a977049d HR |
1827 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1828 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1829 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1830 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1831 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1832 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1833 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1d846126 SH |
1834 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
1835 | cm_id_priv->av.timeout = | |
1836 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1837 | cm_id_priv->av.timeout - 1); | |
1838 | cm_id_priv->alt_av.timeout = | |
1839 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1840 | cm_id_priv->alt_av.timeout - 1); | |
a977049d HR |
1841 | |
1842 | /* todo: handle peer_to_peer */ | |
1843 | ||
34816ad9 | 1844 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1845 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1846 | if (!ret) | |
1847 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1848 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1849 | |
1850 | if (ret) | |
1851 | cm_process_work(cm_id_priv, work); | |
1852 | else | |
1853 | cm_deref_id(cm_id_priv); | |
1854 | return 0; | |
1855 | ||
87fd1a11 | 1856 | error: |
a977049d HR |
1857 | cm_deref_id(cm_id_priv); |
1858 | return ret; | |
1859 | } | |
1860 | ||
1861 | static int cm_establish_handler(struct cm_work *work) | |
1862 | { | |
1863 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1864 | int ret; |
1865 | ||
e1444b5a | 1866 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
1867 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
1868 | if (!cm_id_priv) | |
1869 | return -EINVAL; | |
1870 | ||
24be6e81 | 1871 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1872 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 1873 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1874 | goto out; |
1875 | } | |
1876 | ||
34816ad9 | 1877 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1878 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1879 | if (!ret) | |
1880 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1881 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1882 | |
1883 | if (ret) | |
1884 | cm_process_work(cm_id_priv, work); | |
1885 | else | |
1886 | cm_deref_id(cm_id_priv); | |
1887 | return 0; | |
1888 | out: | |
1889 | cm_deref_id(cm_id_priv); | |
1890 | return -EINVAL; | |
1891 | } | |
1892 | ||
1893 | static int cm_rtu_handler(struct cm_work *work) | |
1894 | { | |
1895 | struct cm_id_private *cm_id_priv; | |
1896 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
1897 | int ret; |
1898 | ||
1899 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1900 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1901 | rtu_msg->local_comm_id); | |
1902 | if (!cm_id_priv) | |
1903 | return -EINVAL; | |
1904 | ||
1905 | work->cm_event.private_data = &rtu_msg->private_data; | |
1906 | ||
24be6e81 | 1907 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1908 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
1909 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 1910 | spin_unlock_irq(&cm_id_priv->lock); |
9af57b7a SH |
1911 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1912 | counter[CM_RTU_COUNTER]); | |
a977049d HR |
1913 | goto out; |
1914 | } | |
1915 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1916 | ||
34816ad9 | 1917 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1918 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1919 | if (!ret) | |
1920 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1921 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1922 | |
1923 | if (ret) | |
1924 | cm_process_work(cm_id_priv, work); | |
1925 | else | |
1926 | cm_deref_id(cm_id_priv); | |
1927 | return 0; | |
1928 | out: | |
1929 | cm_deref_id(cm_id_priv); | |
1930 | return -EINVAL; | |
1931 | } | |
1932 | ||
1933 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1934 | struct cm_id_private *cm_id_priv, | |
1935 | const void *private_data, | |
1936 | u8 private_data_len) | |
1937 | { | |
1938 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1939 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1940 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1941 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1942 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1943 | ||
1944 | if (private_data && private_data_len) | |
1945 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1946 | } | |
1947 | ||
1948 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1949 | const void *private_data, | |
1950 | u8 private_data_len) | |
1951 | { | |
1952 | struct cm_id_private *cm_id_priv; | |
1953 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1954 | unsigned long flags; |
1955 | int ret; | |
1956 | ||
1957 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1958 | return -EINVAL; | |
1959 | ||
1960 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1961 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1962 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1963 | ret = -EINVAL; | |
1964 | goto out; | |
1965 | } | |
1966 | ||
1967 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1968 | if (ret) { | |
1969 | cm_enter_timewait(cm_id_priv); | |
1970 | goto out; | |
1971 | } | |
1972 | ||
1973 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1974 | private_data, private_data_len); | |
34816ad9 | 1975 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1976 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
1977 | ||
34816ad9 | 1978 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1979 | if (ret) { |
1980 | cm_enter_timewait(cm_id_priv); | |
1981 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1982 | cm_free_msg(msg); | |
1983 | return ret; | |
1984 | } | |
1985 | ||
1986 | cm_id->state = IB_CM_DREQ_SENT; | |
1987 | cm_id_priv->msg = msg; | |
1988 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1989 | return ret; | |
1990 | } | |
1991 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
1992 | ||
1993 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
1994 | struct cm_id_private *cm_id_priv, | |
1995 | const void *private_data, | |
1996 | u8 private_data_len) | |
1997 | { | |
1998 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
1999 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
2000 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2001 | ||
2002 | if (private_data && private_data_len) | |
2003 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
2004 | } | |
2005 | ||
2006 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
2007 | const void *private_data, | |
2008 | u8 private_data_len) | |
2009 | { | |
2010 | struct cm_id_private *cm_id_priv; | |
2011 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2012 | unsigned long flags; |
2013 | void *data; | |
2014 | int ret; | |
2015 | ||
2016 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
2017 | return -EINVAL; | |
2018 | ||
2019 | data = cm_copy_private_data(private_data, private_data_len); | |
2020 | if (IS_ERR(data)) | |
2021 | return PTR_ERR(data); | |
2022 | ||
2023 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2024 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2025 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
2026 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2027 | kfree(data); | |
2028 | return -EINVAL; | |
2029 | } | |
2030 | ||
2031 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2032 | cm_enter_timewait(cm_id_priv); | |
2033 | ||
2034 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2035 | if (ret) | |
2036 | goto out; | |
2037 | ||
2038 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2039 | private_data, private_data_len); | |
2040 | ||
34816ad9 | 2041 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2042 | if (ret) { |
2043 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2044 | cm_free_msg(msg); | |
2045 | return ret; | |
2046 | } | |
2047 | ||
2048 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2049 | return ret; | |
2050 | } | |
2051 | EXPORT_SYMBOL(ib_send_cm_drep); | |
2052 | ||
82a9c16a SH |
2053 | static int cm_issue_drep(struct cm_port *port, |
2054 | struct ib_mad_recv_wc *mad_recv_wc) | |
2055 | { | |
2056 | struct ib_mad_send_buf *msg = NULL; | |
2057 | struct cm_dreq_msg *dreq_msg; | |
2058 | struct cm_drep_msg *drep_msg; | |
2059 | int ret; | |
2060 | ||
2061 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
2062 | if (ret) | |
2063 | return ret; | |
2064 | ||
2065 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
2066 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
2067 | ||
2068 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
2069 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
2070 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
2071 | ||
2072 | ret = ib_post_send_mad(msg, NULL); | |
2073 | if (ret) | |
2074 | cm_free_msg(msg); | |
2075 | ||
2076 | return ret; | |
2077 | } | |
2078 | ||
a977049d HR |
2079 | static int cm_dreq_handler(struct cm_work *work) |
2080 | { | |
2081 | struct cm_id_private *cm_id_priv; | |
2082 | struct cm_dreq_msg *dreq_msg; | |
2083 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2084 | int ret; |
2085 | ||
2086 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
2087 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
2088 | dreq_msg->local_comm_id); | |
82a9c16a | 2089 | if (!cm_id_priv) { |
9af57b7a SH |
2090 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2091 | counter[CM_DREQ_COUNTER]); | |
82a9c16a | 2092 | cm_issue_drep(work->port, work->mad_recv_wc); |
a977049d | 2093 | return -EINVAL; |
82a9c16a | 2094 | } |
a977049d HR |
2095 | |
2096 | work->cm_event.private_data = &dreq_msg->private_data; | |
2097 | ||
24be6e81 | 2098 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2099 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
2100 | goto unlock; | |
2101 | ||
2102 | switch (cm_id_priv->id.state) { | |
2103 | case IB_CM_REP_SENT: | |
2104 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2105 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2106 | break; |
2107 | case IB_CM_ESTABLISHED: | |
2108 | case IB_CM_MRA_REP_RCVD: | |
2109 | break; | |
2110 | case IB_CM_TIMEWAIT: | |
9af57b7a SH |
2111 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2112 | counter[CM_DREQ_COUNTER]); | |
a977049d HR |
2113 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2114 | goto unlock; | |
2115 | ||
2116 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2117 | cm_id_priv->private_data, | |
2118 | cm_id_priv->private_data_len); | |
24be6e81 | 2119 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2120 | |
34816ad9 | 2121 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2122 | cm_free_msg(msg); |
2123 | goto deref; | |
9af57b7a SH |
2124 | case IB_CM_DREQ_RCVD: |
2125 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2126 | counter[CM_DREQ_COUNTER]); | |
2127 | goto unlock; | |
a977049d HR |
2128 | default: |
2129 | goto unlock; | |
2130 | } | |
2131 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
2132 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
2133 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2134 | if (!ret) | |
2135 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2136 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2137 | |
2138 | if (ret) | |
2139 | cm_process_work(cm_id_priv, work); | |
2140 | else | |
2141 | cm_deref_id(cm_id_priv); | |
2142 | return 0; | |
2143 | ||
24be6e81 | 2144 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2145 | deref: cm_deref_id(cm_id_priv); |
2146 | return -EINVAL; | |
2147 | } | |
2148 | ||
2149 | static int cm_drep_handler(struct cm_work *work) | |
2150 | { | |
2151 | struct cm_id_private *cm_id_priv; | |
2152 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2153 | int ret; |
2154 | ||
2155 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2156 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2157 | drep_msg->local_comm_id); | |
2158 | if (!cm_id_priv) | |
2159 | return -EINVAL; | |
2160 | ||
2161 | work->cm_event.private_data = &drep_msg->private_data; | |
2162 | ||
24be6e81 | 2163 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2164 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2165 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2166 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2167 | goto out; |
2168 | } | |
2169 | cm_enter_timewait(cm_id_priv); | |
2170 | ||
34816ad9 | 2171 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2172 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2173 | if (!ret) | |
2174 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2175 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2176 | |
2177 | if (ret) | |
2178 | cm_process_work(cm_id_priv, work); | |
2179 | else | |
2180 | cm_deref_id(cm_id_priv); | |
2181 | return 0; | |
2182 | out: | |
2183 | cm_deref_id(cm_id_priv); | |
2184 | return -EINVAL; | |
2185 | } | |
2186 | ||
2187 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2188 | enum ib_cm_rej_reason reason, | |
2189 | void *ari, | |
2190 | u8 ari_length, | |
2191 | const void *private_data, | |
2192 | u8 private_data_len) | |
2193 | { | |
2194 | struct cm_id_private *cm_id_priv; | |
2195 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2196 | unsigned long flags; |
2197 | int ret; | |
2198 | ||
2199 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2200 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2201 | return -EINVAL; | |
2202 | ||
2203 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2204 | ||
2205 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2206 | switch (cm_id->state) { | |
2207 | case IB_CM_REQ_SENT: | |
2208 | case IB_CM_MRA_REQ_RCVD: | |
2209 | case IB_CM_REQ_RCVD: | |
2210 | case IB_CM_MRA_REQ_SENT: | |
2211 | case IB_CM_REP_RCVD: | |
2212 | case IB_CM_MRA_REP_SENT: | |
2213 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2214 | if (!ret) | |
2215 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2216 | cm_id_priv, reason, ari, ari_length, | |
2217 | private_data, private_data_len); | |
2218 | ||
2219 | cm_reset_to_idle(cm_id_priv); | |
2220 | break; | |
2221 | case IB_CM_REP_SENT: | |
2222 | case IB_CM_MRA_REP_RCVD: | |
2223 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2224 | if (!ret) | |
2225 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2226 | cm_id_priv, reason, ari, ari_length, | |
2227 | private_data, private_data_len); | |
2228 | ||
2229 | cm_enter_timewait(cm_id_priv); | |
2230 | break; | |
2231 | default: | |
2232 | ret = -EINVAL; | |
2233 | goto out; | |
2234 | } | |
2235 | ||
2236 | if (ret) | |
2237 | goto out; | |
2238 | ||
34816ad9 | 2239 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2240 | if (ret) |
2241 | cm_free_msg(msg); | |
2242 | ||
2243 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2244 | return ret; | |
2245 | } | |
2246 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2247 | ||
2248 | static void cm_format_rej_event(struct cm_work *work) | |
2249 | { | |
2250 | struct cm_rej_msg *rej_msg; | |
2251 | struct ib_cm_rej_event_param *param; | |
2252 | ||
2253 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2254 | param = &work->cm_event.param.rej_rcvd; | |
2255 | param->ari = rej_msg->ari; | |
2256 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2257 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2258 | work->cm_event.private_data = &rej_msg->private_data; |
2259 | } | |
2260 | ||
2261 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2262 | { | |
2263 | struct cm_timewait_info *timewait_info; | |
2264 | struct cm_id_private *cm_id_priv; | |
97f52eb4 | 2265 | __be32 remote_id; |
a977049d HR |
2266 | |
2267 | remote_id = rej_msg->local_comm_id; | |
2268 | ||
97f52eb4 | 2269 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
24be6e81 | 2270 | spin_lock_irq(&cm.lock); |
97f52eb4 | 2271 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2272 | remote_id); |
2273 | if (!timewait_info) { | |
24be6e81 | 2274 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2275 | return NULL; |
2276 | } | |
f06d2653 SH |
2277 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2278 | (timewait_info->work.local_id ^ | |
2279 | cm.random_id_operand)); | |
a977049d HR |
2280 | if (cm_id_priv) { |
2281 | if (cm_id_priv->id.remote_id == remote_id) | |
2282 | atomic_inc(&cm_id_priv->refcount); | |
2283 | else | |
2284 | cm_id_priv = NULL; | |
2285 | } | |
24be6e81 | 2286 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2287 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
2288 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2289 | else | |
2290 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2291 | ||
2292 | return cm_id_priv; | |
2293 | } | |
2294 | ||
2295 | static int cm_rej_handler(struct cm_work *work) | |
2296 | { | |
2297 | struct cm_id_private *cm_id_priv; | |
2298 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
2299 | int ret; |
2300 | ||
2301 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2302 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2303 | if (!cm_id_priv) | |
2304 | return -EINVAL; | |
2305 | ||
2306 | cm_format_rej_event(work); | |
2307 | ||
24be6e81 | 2308 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2309 | switch (cm_id_priv->id.state) { |
2310 | case IB_CM_REQ_SENT: | |
2311 | case IB_CM_MRA_REQ_RCVD: | |
2312 | case IB_CM_REP_SENT: | |
2313 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2314 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2315 | /* fall through */ |
2316 | case IB_CM_REQ_RCVD: | |
2317 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2318 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2319 | cm_enter_timewait(cm_id_priv); |
2320 | else | |
2321 | cm_reset_to_idle(cm_id_priv); | |
2322 | break; | |
2323 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2324 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2325 | /* fall through */ |
2326 | case IB_CM_REP_RCVD: | |
2327 | case IB_CM_MRA_REP_SENT: | |
2328 | case IB_CM_ESTABLISHED: | |
2329 | cm_enter_timewait(cm_id_priv); | |
2330 | break; | |
2331 | default: | |
24be6e81 | 2332 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2333 | ret = -EINVAL; |
2334 | goto out; | |
2335 | } | |
2336 | ||
2337 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2338 | if (!ret) | |
2339 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2340 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2341 | |
2342 | if (ret) | |
2343 | cm_process_work(cm_id_priv, work); | |
2344 | else | |
2345 | cm_deref_id(cm_id_priv); | |
2346 | return 0; | |
2347 | out: | |
2348 | cm_deref_id(cm_id_priv); | |
2349 | return -EINVAL; | |
2350 | } | |
2351 | ||
2352 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2353 | u8 service_timeout, | |
2354 | const void *private_data, | |
2355 | u8 private_data_len) | |
2356 | { | |
2357 | struct cm_id_private *cm_id_priv; | |
2358 | struct ib_mad_send_buf *msg; | |
de98b693 SH |
2359 | enum ib_cm_state cm_state; |
2360 | enum ib_cm_lap_state lap_state; | |
2361 | enum cm_msg_response msg_response; | |
a977049d HR |
2362 | void *data; |
2363 | unsigned long flags; | |
2364 | int ret; | |
2365 | ||
2366 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2367 | return -EINVAL; | |
2368 | ||
2369 | data = cm_copy_private_data(private_data, private_data_len); | |
2370 | if (IS_ERR(data)) | |
2371 | return PTR_ERR(data); | |
2372 | ||
2373 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2374 | ||
2375 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2376 | switch(cm_id_priv->id.state) { | |
2377 | case IB_CM_REQ_RCVD: | |
de98b693 SH |
2378 | cm_state = IB_CM_MRA_REQ_SENT; |
2379 | lap_state = cm_id->lap_state; | |
2380 | msg_response = CM_MSG_RESPONSE_REQ; | |
a977049d HR |
2381 | break; |
2382 | case IB_CM_REP_RCVD: | |
de98b693 SH |
2383 | cm_state = IB_CM_MRA_REP_SENT; |
2384 | lap_state = cm_id->lap_state; | |
2385 | msg_response = CM_MSG_RESPONSE_REP; | |
a977049d HR |
2386 | break; |
2387 | case IB_CM_ESTABLISHED: | |
de98b693 SH |
2388 | cm_state = cm_id->state; |
2389 | lap_state = IB_CM_MRA_LAP_SENT; | |
2390 | msg_response = CM_MSG_RESPONSE_OTHER; | |
2391 | break; | |
2392 | default: | |
2393 | ret = -EINVAL; | |
2394 | goto error1; | |
2395 | } | |
2396 | ||
2397 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { | |
a977049d HR |
2398 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2399 | if (ret) | |
2400 | goto error1; | |
2401 | ||
2402 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
de98b693 | 2403 | msg_response, service_timeout, |
a977049d | 2404 | private_data, private_data_len); |
34816ad9 | 2405 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2406 | if (ret) |
2407 | goto error2; | |
a977049d | 2408 | } |
de98b693 SH |
2409 | |
2410 | cm_id->state = cm_state; | |
2411 | cm_id->lap_state = lap_state; | |
a977049d HR |
2412 | cm_id_priv->service_timeout = service_timeout; |
2413 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2414 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2415 | return 0; | |
2416 | ||
2417 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2418 | kfree(data); | |
2419 | return ret; | |
2420 | ||
2421 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2422 | kfree(data); | |
2423 | cm_free_msg(msg); | |
2424 | return ret; | |
2425 | } | |
2426 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2427 | ||
2428 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2429 | { | |
2430 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2431 | case CM_MSG_RESPONSE_REQ: | |
2432 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2433 | case CM_MSG_RESPONSE_REP: | |
2434 | case CM_MSG_RESPONSE_OTHER: | |
2435 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2436 | mra_msg->local_comm_id); | |
2437 | default: | |
2438 | return NULL; | |
2439 | } | |
2440 | } | |
2441 | ||
2442 | static int cm_mra_handler(struct cm_work *work) | |
2443 | { | |
2444 | struct cm_id_private *cm_id_priv; | |
2445 | struct cm_mra_msg *mra_msg; | |
a977049d HR |
2446 | int timeout, ret; |
2447 | ||
2448 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2449 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2450 | if (!cm_id_priv) | |
2451 | return -EINVAL; | |
2452 | ||
2453 | work->cm_event.private_data = &mra_msg->private_data; | |
2454 | work->cm_event.param.mra_rcvd.service_timeout = | |
2455 | cm_mra_get_service_timeout(mra_msg); | |
2456 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
1d846126 | 2457 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 2458 | |
24be6e81 | 2459 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2460 | switch (cm_id_priv->id.state) { |
2461 | case IB_CM_REQ_SENT: | |
2462 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2463 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2464 | cm_id_priv->msg, timeout)) |
a977049d HR |
2465 | goto out; |
2466 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2467 | break; | |
2468 | case IB_CM_REP_SENT: | |
2469 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2470 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2471 | cm_id_priv->msg, timeout)) |
a977049d HR |
2472 | goto out; |
2473 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2474 | break; | |
2475 | case IB_CM_ESTABLISHED: | |
2476 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2477 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2478 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
9af57b7a SH |
2479 | cm_id_priv->msg, timeout)) { |
2480 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2481 | atomic_long_inc(&work->port-> | |
2482 | counter_group[CM_RECV_DUPLICATES]. | |
2483 | counter[CM_MRA_COUNTER]); | |
a977049d | 2484 | goto out; |
9af57b7a | 2485 | } |
a977049d HR |
2486 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
2487 | break; | |
9af57b7a SH |
2488 | case IB_CM_MRA_REQ_RCVD: |
2489 | case IB_CM_MRA_REP_RCVD: | |
2490 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2491 | counter[CM_MRA_COUNTER]); | |
2492 | /* fall through */ | |
a977049d HR |
2493 | default: |
2494 | goto out; | |
2495 | } | |
2496 | ||
2497 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2498 | cm_id_priv->id.state; | |
2499 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2500 | if (!ret) | |
2501 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2502 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2503 | |
2504 | if (ret) | |
2505 | cm_process_work(cm_id_priv, work); | |
2506 | else | |
2507 | cm_deref_id(cm_id_priv); | |
2508 | return 0; | |
2509 | out: | |
24be6e81 | 2510 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2511 | cm_deref_id(cm_id_priv); |
2512 | return -EINVAL; | |
2513 | } | |
2514 | ||
2515 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2516 | struct cm_id_private *cm_id_priv, | |
2517 | struct ib_sa_path_rec *alternate_path, | |
2518 | const void *private_data, | |
2519 | u8 private_data_len) | |
2520 | { | |
2521 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2522 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2523 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2524 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2525 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2526 | /* todo: need remote CM response timeout */ | |
2527 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2528 | lap_msg->alt_local_lid = alternate_path->slid; | |
2529 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2530 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2531 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2532 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2533 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2534 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2535 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2536 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2537 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2538 | cm_lap_set_local_ack_timeout(lap_msg, | |
1d846126 SH |
2539 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
2540 | alternate_path->packet_life_time)); | |
a977049d HR |
2541 | |
2542 | if (private_data && private_data_len) | |
2543 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2544 | } | |
2545 | ||
2546 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2547 | struct ib_sa_path_rec *alternate_path, | |
2548 | const void *private_data, | |
2549 | u8 private_data_len) | |
2550 | { | |
2551 | struct cm_id_private *cm_id_priv; | |
2552 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2553 | unsigned long flags; |
2554 | int ret; | |
2555 | ||
2556 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2557 | return -EINVAL; | |
2558 | ||
2559 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2560 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2561 | if (cm_id->state != IB_CM_ESTABLISHED || | |
e1444b5a SH |
2562 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
2563 | cm_id->lap_state != IB_CM_LAP_IDLE)) { | |
a977049d HR |
2564 | ret = -EINVAL; |
2565 | goto out; | |
2566 | } | |
2567 | ||
e1444b5a SH |
2568 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
2569 | if (ret) | |
2570 | goto out; | |
1d846126 SH |
2571 | cm_id_priv->alt_av.timeout = |
2572 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2573 | cm_id_priv->alt_av.timeout - 1); | |
e1444b5a | 2574 | |
a977049d HR |
2575 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2576 | if (ret) | |
2577 | goto out; | |
2578 | ||
2579 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2580 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2581 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2582 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2583 | ||
34816ad9 | 2584 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2585 | if (ret) { |
2586 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2587 | cm_free_msg(msg); | |
2588 | return ret; | |
2589 | } | |
2590 | ||
2591 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2592 | cm_id_priv->msg = msg; | |
2593 | ||
2594 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2595 | return ret; | |
2596 | } | |
2597 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2598 | ||
e1444b5a SH |
2599 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
2600 | struct ib_sa_path_rec *path, | |
a977049d HR |
2601 | struct cm_lap_msg *lap_msg) |
2602 | { | |
2603 | memset(path, 0, sizeof *path); | |
2604 | path->dgid = lap_msg->alt_local_gid; | |
2605 | path->sgid = lap_msg->alt_remote_gid; | |
2606 | path->dlid = lap_msg->alt_local_lid; | |
2607 | path->slid = lap_msg->alt_remote_lid; | |
2608 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2609 | path->hop_limit = lap_msg->alt_hop_limit; | |
2610 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2611 | path->reversible = 1; | |
e1444b5a | 2612 | path->pkey = cm_id_priv->pkey; |
a977049d HR |
2613 | path->sl = cm_lap_get_sl(lap_msg); |
2614 | path->mtu_selector = IB_SA_EQ; | |
e1444b5a | 2615 | path->mtu = cm_id_priv->path_mtu; |
a977049d HR |
2616 | path->rate_selector = IB_SA_EQ; |
2617 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2618 | path->packet_life_time_selector = IB_SA_EQ; | |
2619 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2620 | path->packet_life_time -= (path->packet_life_time > 0); | |
2621 | } | |
2622 | ||
2623 | static int cm_lap_handler(struct cm_work *work) | |
2624 | { | |
2625 | struct cm_id_private *cm_id_priv; | |
2626 | struct cm_lap_msg *lap_msg; | |
2627 | struct ib_cm_lap_event_param *param; | |
2628 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2629 | int ret; |
2630 | ||
2631 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2632 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2633 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2634 | lap_msg->local_comm_id); | |
2635 | if (!cm_id_priv) | |
2636 | return -EINVAL; | |
2637 | ||
2638 | param = &work->cm_event.param.lap_rcvd; | |
2639 | param->alternate_path = &work->path[0]; | |
e1444b5a | 2640 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
a977049d HR |
2641 | work->cm_event.private_data = &lap_msg->private_data; |
2642 | ||
24be6e81 | 2643 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2644 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
2645 | goto unlock; | |
2646 | ||
2647 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 2648 | case IB_CM_LAP_UNINIT: |
a977049d HR |
2649 | case IB_CM_LAP_IDLE: |
2650 | break; | |
2651 | case IB_CM_MRA_LAP_SENT: | |
9af57b7a SH |
2652 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2653 | counter[CM_LAP_COUNTER]); | |
a977049d HR |
2654 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2655 | goto unlock; | |
2656 | ||
2657 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2658 | CM_MSG_RESPONSE_OTHER, | |
2659 | cm_id_priv->service_timeout, | |
2660 | cm_id_priv->private_data, | |
2661 | cm_id_priv->private_data_len); | |
24be6e81 | 2662 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2663 | |
34816ad9 | 2664 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2665 | cm_free_msg(msg); |
2666 | goto deref; | |
9af57b7a SH |
2667 | case IB_CM_LAP_RCVD: |
2668 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2669 | counter[CM_LAP_COUNTER]); | |
2670 | goto unlock; | |
a977049d HR |
2671 | default: |
2672 | goto unlock; | |
2673 | } | |
2674 | ||
2675 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2676 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e1444b5a SH |
2677 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2678 | work->mad_recv_wc->recv_buf.grh, | |
2679 | &cm_id_priv->av); | |
2680 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); | |
a977049d HR |
2681 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2682 | if (!ret) | |
2683 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2684 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2685 | |
2686 | if (ret) | |
2687 | cm_process_work(cm_id_priv, work); | |
2688 | else | |
2689 | cm_deref_id(cm_id_priv); | |
2690 | return 0; | |
2691 | ||
24be6e81 | 2692 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2693 | deref: cm_deref_id(cm_id_priv); |
2694 | return -EINVAL; | |
2695 | } | |
2696 | ||
2697 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2698 | struct cm_id_private *cm_id_priv, | |
2699 | enum ib_cm_apr_status status, | |
2700 | void *info, | |
2701 | u8 info_length, | |
2702 | const void *private_data, | |
2703 | u8 private_data_len) | |
2704 | { | |
2705 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2706 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2707 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2708 | apr_msg->ap_status = (u8) status; | |
2709 | ||
2710 | if (info && info_length) { | |
2711 | apr_msg->info_length = info_length; | |
2712 | memcpy(apr_msg->info, info, info_length); | |
2713 | } | |
2714 | ||
2715 | if (private_data && private_data_len) | |
2716 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2717 | } | |
2718 | ||
2719 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2720 | enum ib_cm_apr_status status, | |
2721 | void *info, | |
2722 | u8 info_length, | |
2723 | const void *private_data, | |
2724 | u8 private_data_len) | |
2725 | { | |
2726 | struct cm_id_private *cm_id_priv; | |
2727 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2728 | unsigned long flags; |
2729 | int ret; | |
2730 | ||
2731 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2732 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2733 | return -EINVAL; | |
2734 | ||
2735 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2736 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2737 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2738 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2739 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2740 | ret = -EINVAL; | |
2741 | goto out; | |
2742 | } | |
2743 | ||
2744 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2745 | if (ret) | |
2746 | goto out; | |
2747 | ||
2748 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2749 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2750 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2751 | if (ret) { |
2752 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2753 | cm_free_msg(msg); | |
2754 | return ret; | |
2755 | } | |
2756 | ||
2757 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2758 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2759 | return ret; | |
2760 | } | |
2761 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2762 | ||
2763 | static int cm_apr_handler(struct cm_work *work) | |
2764 | { | |
2765 | struct cm_id_private *cm_id_priv; | |
2766 | struct cm_apr_msg *apr_msg; | |
a977049d HR |
2767 | int ret; |
2768 | ||
2769 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2770 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2771 | apr_msg->local_comm_id); | |
2772 | if (!cm_id_priv) | |
2773 | return -EINVAL; /* Unmatched reply. */ | |
2774 | ||
2775 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2776 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2777 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2778 | work->cm_event.private_data = &apr_msg->private_data; | |
2779 | ||
24be6e81 | 2780 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2781 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
2782 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2783 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 2784 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2785 | goto out; |
2786 | } | |
2787 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2788 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2789 | cm_id_priv->msg = NULL; |
2790 | ||
2791 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2792 | if (!ret) | |
2793 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2794 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2795 | |
2796 | if (ret) | |
2797 | cm_process_work(cm_id_priv, work); | |
2798 | else | |
2799 | cm_deref_id(cm_id_priv); | |
2800 | return 0; | |
2801 | out: | |
2802 | cm_deref_id(cm_id_priv); | |
2803 | return -EINVAL; | |
2804 | } | |
2805 | ||
2806 | static int cm_timewait_handler(struct cm_work *work) | |
2807 | { | |
2808 | struct cm_timewait_info *timewait_info; | |
2809 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2810 | int ret; |
2811 | ||
2812 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2813 | spin_lock_irq(&cm.lock); |
2814 | list_del(&timewait_info->list); | |
2815 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2816 | |
2817 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2818 | timewait_info->work.remote_id); | |
2819 | if (!cm_id_priv) | |
2820 | return -EINVAL; | |
2821 | ||
8575329d | 2822 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2823 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2824 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2825 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2826 | goto out; |
2827 | } | |
2828 | cm_id_priv->id.state = IB_CM_IDLE; | |
2829 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2830 | if (!ret) | |
2831 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2832 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2833 | |
2834 | if (ret) | |
2835 | cm_process_work(cm_id_priv, work); | |
2836 | else | |
2837 | cm_deref_id(cm_id_priv); | |
2838 | return 0; | |
2839 | out: | |
2840 | cm_deref_id(cm_id_priv); | |
2841 | return -EINVAL; | |
2842 | } | |
2843 | ||
2844 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2845 | struct cm_id_private *cm_id_priv, | |
2846 | struct ib_cm_sidr_req_param *param) | |
2847 | { | |
2848 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2849 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2850 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
75af9088 | 2851 | sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
a977049d HR |
2852 | sidr_req_msg->service_id = param->service_id; |
2853 | ||
2854 | if (param->private_data && param->private_data_len) | |
2855 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2856 | param->private_data_len); | |
2857 | } | |
2858 | ||
2859 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2860 | struct ib_cm_sidr_req_param *param) | |
2861 | { | |
2862 | struct cm_id_private *cm_id_priv; | |
2863 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2864 | unsigned long flags; |
2865 | int ret; | |
2866 | ||
2867 | if (!param->path || (param->private_data && | |
2868 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2869 | return -EINVAL; | |
2870 | ||
2871 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2872 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2873 | if (ret) | |
2874 | goto out; | |
2875 | ||
2876 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2877 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2878 | cm_id_priv->timeout_ms = param->timeout_ms; |
2879 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2880 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2881 | if (ret) | |
2882 | goto out; | |
2883 | ||
2884 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2885 | param); | |
34816ad9 | 2886 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2887 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2888 | ||
2889 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2890 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2891 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2892 | else |
2893 | ret = -EINVAL; | |
2894 | ||
2895 | if (ret) { | |
2896 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2897 | cm_free_msg(msg); | |
2898 | goto out; | |
2899 | } | |
2900 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2901 | cm_id_priv->msg = msg; | |
2902 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2903 | out: | |
2904 | return ret; | |
2905 | } | |
2906 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2907 | ||
2908 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2909 | struct ib_cm_id *listen_id) | |
2910 | { | |
2911 | struct cm_sidr_req_msg *sidr_req_msg; | |
2912 | struct ib_cm_sidr_req_event_param *param; | |
2913 | ||
2914 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2915 | work->mad_recv_wc->recv_buf.mad; | |
2916 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2917 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2918 | param->listen_id = listen_id; |
a977049d HR |
2919 | param->port = work->port->port_num; |
2920 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2921 | } | |
2922 | ||
2923 | static int cm_sidr_req_handler(struct cm_work *work) | |
2924 | { | |
2925 | struct ib_cm_id *cm_id; | |
2926 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2927 | struct cm_sidr_req_msg *sidr_req_msg; | |
2928 | struct ib_wc *wc; | |
a977049d | 2929 | |
07d357d0 | 2930 | cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
a977049d HR |
2931 | if (IS_ERR(cm_id)) |
2932 | return PTR_ERR(cm_id); | |
2933 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2934 | ||
2935 | /* Record SGID/SLID and request ID for lookup. */ | |
2936 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2937 | work->mad_recv_wc->recv_buf.mad; | |
2938 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2939 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2940 | cm_id_priv->av.dgid.global.interface_id = 0; |
2941 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 2942 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
2943 | &cm_id_priv->av); |
2944 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
a977049d HR |
2945 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
2946 | atomic_inc(&cm_id_priv->work_count); | |
2947 | ||
24be6e81 | 2948 | spin_lock_irq(&cm.lock); |
a977049d HR |
2949 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
2950 | if (cur_cm_id_priv) { | |
24be6e81 | 2951 | spin_unlock_irq(&cm.lock); |
9af57b7a SH |
2952 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2953 | counter[CM_SIDR_REQ_COUNTER]); | |
a977049d HR |
2954 | goto out; /* Duplicate message. */ |
2955 | } | |
29c2731c | 2956 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
07d357d0 | 2957 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
2958 | sidr_req_msg->service_id, |
2959 | sidr_req_msg->private_data); | |
a977049d | 2960 | if (!cur_cm_id_priv) { |
24be6e81 | 2961 | spin_unlock_irq(&cm.lock); |
6164c8cd | 2962 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
a977049d HR |
2963 | goto out; /* No match. */ |
2964 | } | |
2965 | atomic_inc(&cur_cm_id_priv->refcount); | |
24be6e81 | 2966 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2967 | |
2968 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2969 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2970 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2971 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2972 | |
2973 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2974 | cm_process_work(cm_id_priv, work); | |
2975 | cm_deref_id(cur_cm_id_priv); | |
2976 | return 0; | |
2977 | out: | |
2978 | ib_destroy_cm_id(&cm_id_priv->id); | |
2979 | return -EINVAL; | |
2980 | } | |
2981 | ||
2982 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
2983 | struct cm_id_private *cm_id_priv, | |
2984 | struct ib_cm_sidr_rep_param *param) | |
2985 | { | |
2986 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
2987 | cm_id_priv->tid); | |
2988 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
2989 | sidr_rep_msg->status = param->status; | |
2990 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
2991 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
2992 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
2993 | ||
2994 | if (param->info && param->info_length) | |
2995 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
2996 | ||
2997 | if (param->private_data && param->private_data_len) | |
2998 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
2999 | param->private_data_len); | |
3000 | } | |
3001 | ||
3002 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
3003 | struct ib_cm_sidr_rep_param *param) | |
3004 | { | |
3005 | struct cm_id_private *cm_id_priv; | |
3006 | struct ib_mad_send_buf *msg; | |
a977049d HR |
3007 | unsigned long flags; |
3008 | int ret; | |
3009 | ||
3010 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
3011 | (param->private_data && | |
3012 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
3013 | return -EINVAL; | |
3014 | ||
3015 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3016 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3017 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
3018 | ret = -EINVAL; | |
3019 | goto error; | |
3020 | } | |
3021 | ||
3022 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
3023 | if (ret) | |
3024 | goto error; | |
3025 | ||
3026 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
3027 | param); | |
34816ad9 | 3028 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
3029 | if (ret) { |
3030 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3031 | cm_free_msg(msg); | |
3032 | return ret; | |
3033 | } | |
3034 | cm_id->state = IB_CM_IDLE; | |
3035 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3036 | ||
3037 | spin_lock_irqsave(&cm.lock, flags); | |
3038 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
3039 | spin_unlock_irqrestore(&cm.lock, flags); | |
3040 | return 0; | |
3041 | ||
3042 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3043 | return ret; | |
3044 | } | |
3045 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
3046 | ||
3047 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
3048 | { | |
3049 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3050 | struct ib_cm_sidr_rep_event_param *param; | |
3051 | ||
3052 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3053 | work->mad_recv_wc->recv_buf.mad; | |
3054 | param = &work->cm_event.param.sidr_rep_rcvd; | |
3055 | param->status = sidr_rep_msg->status; | |
3056 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
3057 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
3058 | param->info = &sidr_rep_msg->info; | |
3059 | param->info_len = sidr_rep_msg->info_length; | |
3060 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
3061 | } | |
3062 | ||
3063 | static int cm_sidr_rep_handler(struct cm_work *work) | |
3064 | { | |
3065 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3066 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
3067 | |
3068 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3069 | work->mad_recv_wc->recv_buf.mad; | |
3070 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
3071 | if (!cm_id_priv) | |
3072 | return -EINVAL; /* Unmatched reply. */ | |
3073 | ||
24be6e81 | 3074 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 3075 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 3076 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3077 | goto out; |
3078 | } | |
3079 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 3080 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 3081 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3082 | |
3083 | cm_format_sidr_rep_event(work); | |
3084 | cm_process_work(cm_id_priv, work); | |
3085 | return 0; | |
3086 | out: | |
3087 | cm_deref_id(cm_id_priv); | |
3088 | return -EINVAL; | |
3089 | } | |
3090 | ||
3091 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
3092 | enum ib_wc_status wc_status) | |
3093 | { | |
3094 | struct cm_id_private *cm_id_priv; | |
3095 | struct ib_cm_event cm_event; | |
3096 | enum ib_cm_state state; | |
a977049d HR |
3097 | int ret; |
3098 | ||
3099 | memset(&cm_event, 0, sizeof cm_event); | |
3100 | cm_id_priv = msg->context[0]; | |
3101 | ||
3102 | /* Discard old sends or ones without a response. */ | |
24be6e81 | 3103 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3104 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
3105 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
3106 | goto discard; | |
3107 | ||
3108 | switch (state) { | |
3109 | case IB_CM_REQ_SENT: | |
3110 | case IB_CM_MRA_REQ_RCVD: | |
3111 | cm_reset_to_idle(cm_id_priv); | |
3112 | cm_event.event = IB_CM_REQ_ERROR; | |
3113 | break; | |
3114 | case IB_CM_REP_SENT: | |
3115 | case IB_CM_MRA_REP_RCVD: | |
3116 | cm_reset_to_idle(cm_id_priv); | |
3117 | cm_event.event = IB_CM_REP_ERROR; | |
3118 | break; | |
3119 | case IB_CM_DREQ_SENT: | |
3120 | cm_enter_timewait(cm_id_priv); | |
3121 | cm_event.event = IB_CM_DREQ_ERROR; | |
3122 | break; | |
3123 | case IB_CM_SIDR_REQ_SENT: | |
3124 | cm_id_priv->id.state = IB_CM_IDLE; | |
3125 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
3126 | break; | |
3127 | default: | |
3128 | goto discard; | |
3129 | } | |
24be6e81 | 3130 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3131 | cm_event.param.send_status = wc_status; |
3132 | ||
3133 | /* No other events can occur on the cm_id at this point. */ | |
3134 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
3135 | cm_free_msg(msg); | |
3136 | if (ret) | |
3137 | ib_destroy_cm_id(&cm_id_priv->id); | |
3138 | return; | |
3139 | discard: | |
24be6e81 | 3140 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3141 | cm_free_msg(msg); |
3142 | } | |
3143 | ||
3144 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
3145 | struct ib_mad_send_wc *mad_send_wc) | |
3146 | { | |
34816ad9 | 3147 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
9af57b7a SH |
3148 | struct cm_port *port; |
3149 | u16 attr_index; | |
3150 | ||
3151 | port = mad_agent->context; | |
3152 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) | |
3153 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; | |
3154 | ||
3155 | /* | |
3156 | * If the send was in response to a received message (context[0] is not | |
3157 | * set to a cm_id), and is not a REJ, then it is a send that was | |
3158 | * manually retried. | |
3159 | */ | |
3160 | if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) | |
3161 | msg->retries = 1; | |
3162 | ||
3163 | atomic_long_add(1 + msg->retries, | |
3164 | &port->counter_group[CM_XMIT].counter[attr_index]); | |
3165 | if (msg->retries) | |
3166 | atomic_long_add(msg->retries, | |
3167 | &port->counter_group[CM_XMIT_RETRIES]. | |
3168 | counter[attr_index]); | |
a977049d HR |
3169 | |
3170 | switch (mad_send_wc->status) { | |
3171 | case IB_WC_SUCCESS: | |
3172 | case IB_WC_WR_FLUSH_ERR: | |
3173 | cm_free_msg(msg); | |
3174 | break; | |
3175 | default: | |
3176 | if (msg->context[0] && msg->context[1]) | |
3177 | cm_process_send_error(msg, mad_send_wc->status); | |
3178 | else | |
3179 | cm_free_msg(msg); | |
3180 | break; | |
3181 | } | |
3182 | } | |
3183 | ||
c4028958 | 3184 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3185 | { |
c4028958 | 3186 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3187 | int ret; |
3188 | ||
3189 | switch (work->cm_event.event) { | |
3190 | case IB_CM_REQ_RECEIVED: | |
3191 | ret = cm_req_handler(work); | |
3192 | break; | |
3193 | case IB_CM_MRA_RECEIVED: | |
3194 | ret = cm_mra_handler(work); | |
3195 | break; | |
3196 | case IB_CM_REJ_RECEIVED: | |
3197 | ret = cm_rej_handler(work); | |
3198 | break; | |
3199 | case IB_CM_REP_RECEIVED: | |
3200 | ret = cm_rep_handler(work); | |
3201 | break; | |
3202 | case IB_CM_RTU_RECEIVED: | |
3203 | ret = cm_rtu_handler(work); | |
3204 | break; | |
3205 | case IB_CM_USER_ESTABLISHED: | |
3206 | ret = cm_establish_handler(work); | |
3207 | break; | |
3208 | case IB_CM_DREQ_RECEIVED: | |
3209 | ret = cm_dreq_handler(work); | |
3210 | break; | |
3211 | case IB_CM_DREP_RECEIVED: | |
3212 | ret = cm_drep_handler(work); | |
3213 | break; | |
3214 | case IB_CM_SIDR_REQ_RECEIVED: | |
3215 | ret = cm_sidr_req_handler(work); | |
3216 | break; | |
3217 | case IB_CM_SIDR_REP_RECEIVED: | |
3218 | ret = cm_sidr_rep_handler(work); | |
3219 | break; | |
3220 | case IB_CM_LAP_RECEIVED: | |
3221 | ret = cm_lap_handler(work); | |
3222 | break; | |
3223 | case IB_CM_APR_RECEIVED: | |
3224 | ret = cm_apr_handler(work); | |
3225 | break; | |
3226 | case IB_CM_TIMEWAIT_EXIT: | |
3227 | ret = cm_timewait_handler(work); | |
3228 | break; | |
3229 | default: | |
3230 | ret = -EINVAL; | |
3231 | break; | |
3232 | } | |
3233 | if (ret) | |
3234 | cm_free_work(work); | |
3235 | } | |
3236 | ||
e1444b5a | 3237 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3238 | { |
3239 | struct cm_id_private *cm_id_priv; | |
3240 | struct cm_work *work; | |
3241 | unsigned long flags; | |
3242 | int ret = 0; | |
3243 | ||
3244 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3245 | if (!work) | |
3246 | return -ENOMEM; | |
3247 | ||
3248 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3249 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3250 | switch (cm_id->state) | |
3251 | { | |
3252 | case IB_CM_REP_SENT: | |
3253 | case IB_CM_MRA_REP_RCVD: | |
3254 | cm_id->state = IB_CM_ESTABLISHED; | |
3255 | break; | |
3256 | case IB_CM_ESTABLISHED: | |
3257 | ret = -EISCONN; | |
3258 | break; | |
3259 | default: | |
3260 | ret = -EINVAL; | |
3261 | break; | |
3262 | } | |
3263 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3264 | ||
3265 | if (ret) { | |
3266 | kfree(work); | |
3267 | goto out; | |
3268 | } | |
3269 | ||
3270 | /* | |
3271 | * The CM worker thread may try to destroy the cm_id before it | |
3272 | * can execute this work item. To prevent potential deadlock, | |
3273 | * we need to find the cm_id once we're in the context of the | |
3274 | * worker thread, rather than holding a reference on it. | |
3275 | */ | |
c4028958 | 3276 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3277 | work->local_id = cm_id->local_id; |
3278 | work->remote_id = cm_id->remote_id; | |
3279 | work->mad_recv_wc = NULL; | |
3280 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
c4028958 | 3281 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3282 | out: |
3283 | return ret; | |
3284 | } | |
e1444b5a SH |
3285 | |
3286 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3287 | { | |
3288 | struct cm_id_private *cm_id_priv; | |
3289 | unsigned long flags; | |
3290 | int ret = 0; | |
3291 | ||
3292 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3293 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3294 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3295 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3296 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3297 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3298 | cm_id_priv->av = cm_id_priv->alt_av; | |
3299 | } else | |
3300 | ret = -EINVAL; | |
3301 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3302 | ||
3303 | return ret; | |
3304 | } | |
3305 | ||
3306 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3307 | { | |
3308 | int ret; | |
3309 | ||
3310 | switch (event) { | |
3311 | case IB_EVENT_COMM_EST: | |
3312 | ret = cm_establish(cm_id); | |
3313 | break; | |
3314 | case IB_EVENT_PATH_MIG: | |
3315 | ret = cm_migrate(cm_id); | |
3316 | break; | |
3317 | default: | |
3318 | ret = -EINVAL; | |
3319 | } | |
3320 | return ret; | |
3321 | } | |
3322 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3323 | |
3324 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3325 | struct ib_mad_recv_wc *mad_recv_wc) | |
3326 | { | |
9af57b7a | 3327 | struct cm_port *port = mad_agent->context; |
a977049d HR |
3328 | struct cm_work *work; |
3329 | enum ib_cm_event_type event; | |
9af57b7a | 3330 | u16 attr_id; |
a977049d HR |
3331 | int paths = 0; |
3332 | ||
3333 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3334 | case CM_REQ_ATTR_ID: | |
3335 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3336 | alt_local_lid != 0); | |
3337 | event = IB_CM_REQ_RECEIVED; | |
3338 | break; | |
3339 | case CM_MRA_ATTR_ID: | |
3340 | event = IB_CM_MRA_RECEIVED; | |
3341 | break; | |
3342 | case CM_REJ_ATTR_ID: | |
3343 | event = IB_CM_REJ_RECEIVED; | |
3344 | break; | |
3345 | case CM_REP_ATTR_ID: | |
3346 | event = IB_CM_REP_RECEIVED; | |
3347 | break; | |
3348 | case CM_RTU_ATTR_ID: | |
3349 | event = IB_CM_RTU_RECEIVED; | |
3350 | break; | |
3351 | case CM_DREQ_ATTR_ID: | |
3352 | event = IB_CM_DREQ_RECEIVED; | |
3353 | break; | |
3354 | case CM_DREP_ATTR_ID: | |
3355 | event = IB_CM_DREP_RECEIVED; | |
3356 | break; | |
3357 | case CM_SIDR_REQ_ATTR_ID: | |
3358 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3359 | break; | |
3360 | case CM_SIDR_REP_ATTR_ID: | |
3361 | event = IB_CM_SIDR_REP_RECEIVED; | |
3362 | break; | |
3363 | case CM_LAP_ATTR_ID: | |
3364 | paths = 1; | |
3365 | event = IB_CM_LAP_RECEIVED; | |
3366 | break; | |
3367 | case CM_APR_ATTR_ID: | |
3368 | event = IB_CM_APR_RECEIVED; | |
3369 | break; | |
3370 | default: | |
3371 | ib_free_recv_mad(mad_recv_wc); | |
3372 | return; | |
3373 | } | |
3374 | ||
9af57b7a SH |
3375 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
3376 | atomic_long_inc(&port->counter_group[CM_RECV]. | |
3377 | counter[attr_id - CM_ATTR_ID_OFFSET]); | |
3378 | ||
a977049d HR |
3379 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
3380 | GFP_KERNEL); | |
3381 | if (!work) { | |
3382 | ib_free_recv_mad(mad_recv_wc); | |
3383 | return; | |
3384 | } | |
3385 | ||
c4028958 | 3386 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3387 | work->cm_event.event = event; |
3388 | work->mad_recv_wc = mad_recv_wc; | |
9af57b7a | 3389 | work->port = port; |
c4028958 | 3390 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3391 | } |
3392 | ||
3393 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3394 | struct ib_qp_attr *qp_attr, | |
3395 | int *qp_attr_mask) | |
3396 | { | |
3397 | unsigned long flags; | |
3398 | int ret; | |
3399 | ||
3400 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3401 | switch (cm_id_priv->id.state) { | |
3402 | case IB_CM_REQ_SENT: | |
3403 | case IB_CM_MRA_REQ_RCVD: | |
3404 | case IB_CM_REQ_RCVD: | |
3405 | case IB_CM_MRA_REQ_SENT: | |
3406 | case IB_CM_REP_RCVD: | |
3407 | case IB_CM_MRA_REP_SENT: | |
3408 | case IB_CM_REP_SENT: | |
3409 | case IB_CM_MRA_REP_RCVD: | |
3410 | case IB_CM_ESTABLISHED: | |
3411 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3412 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 3413 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 3414 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3415 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3416 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3417 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3418 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3419 | ret = 0; | |
3420 | break; | |
3421 | default: | |
3422 | ret = -EINVAL; | |
3423 | break; | |
3424 | } | |
3425 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3426 | return ret; | |
3427 | } | |
3428 | ||
3429 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3430 | struct ib_qp_attr *qp_attr, | |
3431 | int *qp_attr_mask) | |
3432 | { | |
3433 | unsigned long flags; | |
3434 | int ret; | |
3435 | ||
3436 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3437 | switch (cm_id_priv->id.state) { | |
3438 | case IB_CM_REQ_RCVD: | |
3439 | case IB_CM_MRA_REQ_SENT: | |
3440 | case IB_CM_REP_RCVD: | |
3441 | case IB_CM_MRA_REP_SENT: | |
3442 | case IB_CM_REP_SENT: | |
3443 | case IB_CM_MRA_REP_RCVD: | |
3444 | case IB_CM_ESTABLISHED: | |
3445 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3446 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3447 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3448 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3449 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3450 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
ae7971a7 SH |
3451 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3452 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | | |
3453 | IB_QP_MIN_RNR_TIMER; | |
3454 | qp_attr->max_dest_rd_atomic = | |
3455 | cm_id_priv->responder_resources; | |
3456 | qp_attr->min_rnr_timer = 0; | |
3457 | } | |
a977049d HR |
3458 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3459 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3460 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 3461 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 3462 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
3463 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3464 | } | |
3465 | ret = 0; | |
3466 | break; | |
3467 | default: | |
3468 | ret = -EINVAL; | |
3469 | break; | |
3470 | } | |
3471 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3472 | return ret; | |
3473 | } | |
3474 | ||
3475 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3476 | struct ib_qp_attr *qp_attr, | |
3477 | int *qp_attr_mask) | |
3478 | { | |
3479 | unsigned long flags; | |
3480 | int ret; | |
3481 | ||
3482 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3483 | switch (cm_id_priv->id.state) { | |
0fe313b0 SH |
3484 | /* Allow transition to RTS before sending REP */ |
3485 | case IB_CM_REQ_RCVD: | |
3486 | case IB_CM_MRA_REQ_SENT: | |
3487 | ||
a977049d HR |
3488 | case IB_CM_REP_RCVD: |
3489 | case IB_CM_MRA_REP_SENT: | |
3490 | case IB_CM_REP_SENT: | |
3491 | case IB_CM_MRA_REP_RCVD: | |
3492 | case IB_CM_ESTABLISHED: | |
e1444b5a SH |
3493 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
3494 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
3495 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
3496 | if (cm_id_priv->qp_type == IB_QPT_RC) { | |
3497 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3498 | IB_QP_RNR_RETRY | | |
3499 | IB_QP_MAX_QP_RD_ATOMIC; | |
1d846126 | 3500 | qp_attr->timeout = cm_id_priv->av.timeout; |
e1444b5a SH |
3501 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
3502 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3503 | qp_attr->max_rd_atomic = | |
3504 | cm_id_priv->initiator_depth; | |
3505 | } | |
3506 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3507 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3508 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3509 | } | |
3510 | } else { | |
3511 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
3512 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; | |
3513 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; | |
1d846126 | 3514 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 3515 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
3516 | qp_attr->path_mig_state = IB_MIG_REARM; |
3517 | } | |
3518 | ret = 0; | |
3519 | break; | |
3520 | default: | |
3521 | ret = -EINVAL; | |
3522 | break; | |
3523 | } | |
3524 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3525 | return ret; | |
3526 | } | |
3527 | ||
3528 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3529 | struct ib_qp_attr *qp_attr, | |
3530 | int *qp_attr_mask) | |
3531 | { | |
3532 | struct cm_id_private *cm_id_priv; | |
3533 | int ret; | |
3534 | ||
3535 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3536 | switch (qp_attr->qp_state) { | |
3537 | case IB_QPS_INIT: | |
3538 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3539 | break; | |
3540 | case IB_QPS_RTR: | |
3541 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3542 | break; | |
3543 | case IB_QPS_RTS: | |
3544 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3545 | break; | |
3546 | default: | |
3547 | ret = -EINVAL; | |
3548 | break; | |
3549 | } | |
3550 | return ret; | |
3551 | } | |
3552 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3553 | ||
454a01e7 | 3554 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
1d846126 SH |
3555 | { |
3556 | struct ib_device_attr attr; | |
3557 | ||
3558 | if (ib_query_device(cm_dev->device, &attr)) | |
3559 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ | |
3560 | else | |
3561 | cm_dev->ack_delay = attr.local_ca_ack_delay; | |
3562 | } | |
3563 | ||
9af57b7a SH |
3564 | static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, |
3565 | char *buf) | |
3566 | { | |
3567 | struct cm_counter_group *group; | |
3568 | struct cm_counter_attribute *cm_attr; | |
3569 | ||
3570 | group = container_of(obj, struct cm_counter_group, obj); | |
3571 | cm_attr = container_of(attr, struct cm_counter_attribute, attr); | |
3572 | ||
3573 | return sprintf(buf, "%ld\n", | |
3574 | atomic_long_read(&group->counter[cm_attr->index])); | |
3575 | } | |
3576 | ||
3577 | static struct sysfs_ops cm_counter_ops = { | |
3578 | .show = cm_show_counter | |
3579 | }; | |
3580 | ||
3581 | static struct kobj_type cm_counter_obj_type = { | |
3582 | .sysfs_ops = &cm_counter_ops, | |
3583 | .default_attrs = cm_counter_default_attrs | |
3584 | }; | |
3585 | ||
3586 | static void cm_release_port_obj(struct kobject *obj) | |
3587 | { | |
3588 | struct cm_port *cm_port; | |
3589 | ||
9af57b7a SH |
3590 | cm_port = container_of(obj, struct cm_port, port_obj); |
3591 | kfree(cm_port); | |
3592 | } | |
3593 | ||
3594 | static struct kobj_type cm_port_obj_type = { | |
3595 | .release = cm_release_port_obj | |
3596 | }; | |
3597 | ||
3598 | static void cm_release_dev_obj(struct kobject *obj) | |
3599 | { | |
3600 | struct cm_device *cm_dev; | |
3601 | ||
9af57b7a SH |
3602 | cm_dev = container_of(obj, struct cm_device, dev_obj); |
3603 | kfree(cm_dev); | |
3604 | } | |
3605 | ||
3606 | static struct kobj_type cm_dev_obj_type = { | |
3607 | .release = cm_release_dev_obj | |
3608 | }; | |
3609 | ||
3610 | struct class cm_class = { | |
3611 | .name = "infiniband_cm", | |
3612 | }; | |
3613 | EXPORT_SYMBOL(cm_class); | |
3614 | ||
9af57b7a SH |
3615 | static int cm_create_port_fs(struct cm_port *port) |
3616 | { | |
3617 | int i, ret; | |
3618 | ||
3619 | ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, | |
7c7a9bcc | 3620 | &port->cm_dev->dev_obj, |
9af57b7a SH |
3621 | "%d", port->port_num); |
3622 | if (ret) { | |
3623 | kfree(port); | |
3624 | return ret; | |
3625 | } | |
3626 | ||
3627 | for (i = 0; i < CM_COUNTER_GROUPS; i++) { | |
3628 | ret = kobject_init_and_add(&port->counter_group[i].obj, | |
3629 | &cm_counter_obj_type, | |
7c7a9bcc | 3630 | &port->port_obj, |
9af57b7a SH |
3631 | "%s", counter_group_names[i]); |
3632 | if (ret) | |
3633 | goto error; | |
3634 | } | |
3635 | ||
3636 | return 0; | |
3637 | ||
3638 | error: | |
3639 | while (i--) | |
7c7a9bcc RD |
3640 | kobject_put(&port->counter_group[i].obj); |
3641 | kobject_put(&port->port_obj); | |
9af57b7a SH |
3642 | return ret; |
3643 | ||
3644 | } | |
3645 | ||
3646 | static void cm_remove_port_fs(struct cm_port *port) | |
3647 | { | |
3648 | int i; | |
3649 | ||
3650 | for (i = 0; i < CM_COUNTER_GROUPS; i++) | |
7c7a9bcc | 3651 | kobject_put(&port->counter_group[i].obj); |
9af57b7a | 3652 | |
7c7a9bcc | 3653 | kobject_put(&port->port_obj); |
9af57b7a SH |
3654 | } |
3655 | ||
a977049d HR |
3656 | static void cm_add_one(struct ib_device *device) |
3657 | { | |
3658 | struct cm_device *cm_dev; | |
3659 | struct cm_port *port; | |
3660 | struct ib_mad_reg_req reg_req = { | |
3661 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3662 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3663 | }; | |
3664 | struct ib_port_modify port_modify = { | |
3665 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3666 | }; | |
3667 | unsigned long flags; | |
3668 | int ret; | |
3669 | u8 i; | |
3670 | ||
07ebafba TT |
3671 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
3672 | return; | |
3673 | ||
9af57b7a | 3674 | cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * |
a977049d HR |
3675 | device->phys_port_cnt, GFP_KERNEL); |
3676 | if (!cm_dev) | |
3677 | return; | |
3678 | ||
3679 | cm_dev->device = device; | |
1d846126 | 3680 | cm_get_ack_delay(cm_dev); |
a977049d | 3681 | |
9af57b7a SH |
3682 | ret = kobject_init_and_add(&cm_dev->dev_obj, &cm_dev_obj_type, |
3683 | &cm_class.subsys.kobj, "%s", device->name); | |
3684 | if (ret) { | |
3685 | kfree(cm_dev); | |
3686 | return; | |
3687 | } | |
3688 | ||
a977049d HR |
3689 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
3690 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
9af57b7a SH |
3691 | port = kzalloc(sizeof *port, GFP_KERNEL); |
3692 | if (!port) | |
3693 | goto error1; | |
3694 | ||
3695 | cm_dev->port[i-1] = port; | |
a977049d HR |
3696 | port->cm_dev = cm_dev; |
3697 | port->port_num = i; | |
9af57b7a SH |
3698 | |
3699 | ret = cm_create_port_fs(port); | |
3700 | if (ret) | |
3701 | goto error1; | |
3702 | ||
a977049d HR |
3703 | port->mad_agent = ib_register_mad_agent(device, i, |
3704 | IB_QPT_GSI, | |
3705 | ®_req, | |
3706 | 0, | |
3707 | cm_send_handler, | |
3708 | cm_recv_handler, | |
3709 | port); | |
3710 | if (IS_ERR(port->mad_agent)) | |
9af57b7a | 3711 | goto error2; |
a977049d HR |
3712 | |
3713 | ret = ib_modify_port(device, i, 0, &port_modify); | |
3714 | if (ret) | |
9af57b7a | 3715 | goto error3; |
a977049d HR |
3716 | } |
3717 | ib_set_client_data(device, &cm_client, cm_dev); | |
3718 | ||
3719 | write_lock_irqsave(&cm.device_lock, flags); | |
3720 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3721 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3722 | return; | |
3723 | ||
9af57b7a | 3724 | error3: |
cf311cd4 | 3725 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a SH |
3726 | error2: |
3727 | cm_remove_port_fs(port); | |
cf311cd4 | 3728 | error1: |
a977049d HR |
3729 | port_modify.set_port_cap_mask = 0; |
3730 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3731 | while (--i) { | |
9af57b7a | 3732 | port = cm_dev->port[i-1]; |
a977049d HR |
3733 | ib_modify_port(device, port->port_num, 0, &port_modify); |
3734 | ib_unregister_mad_agent(port->mad_agent); | |
9af57b7a | 3735 | cm_remove_port_fs(port); |
a977049d | 3736 | } |
7c7a9bcc | 3737 | kobject_put(&cm_dev->dev_obj); |
a977049d HR |
3738 | } |
3739 | ||
3740 | static void cm_remove_one(struct ib_device *device) | |
3741 | { | |
3742 | struct cm_device *cm_dev; | |
3743 | struct cm_port *port; | |
3744 | struct ib_port_modify port_modify = { | |
3745 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3746 | }; | |
3747 | unsigned long flags; | |
3748 | int i; | |
3749 | ||
3750 | cm_dev = ib_get_client_data(device, &cm_client); | |
3751 | if (!cm_dev) | |
3752 | return; | |
3753 | ||
3754 | write_lock_irqsave(&cm.device_lock, flags); | |
3755 | list_del(&cm_dev->list); | |
3756 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3757 | ||
3758 | for (i = 1; i <= device->phys_port_cnt; i++) { | |
9af57b7a | 3759 | port = cm_dev->port[i-1]; |
a977049d HR |
3760 | ib_modify_port(device, port->port_num, 0, &port_modify); |
3761 | ib_unregister_mad_agent(port->mad_agent); | |
84ba284c | 3762 | flush_workqueue(cm.wq); |
9af57b7a | 3763 | cm_remove_port_fs(port); |
a977049d | 3764 | } |
7c7a9bcc | 3765 | kobject_put(&cm_dev->dev_obj); |
a977049d HR |
3766 | } |
3767 | ||
3768 | static int __init ib_cm_init(void) | |
3769 | { | |
3770 | int ret; | |
3771 | ||
3772 | memset(&cm, 0, sizeof cm); | |
3773 | INIT_LIST_HEAD(&cm.device_list); | |
3774 | rwlock_init(&cm.device_lock); | |
3775 | spin_lock_init(&cm.lock); | |
3776 | cm.listen_service_table = RB_ROOT; | |
3777 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3778 | cm.remote_id_table = RB_ROOT; | |
3779 | cm.remote_qp_table = RB_ROOT; | |
3780 | cm.remote_sidr_table = RB_ROOT; | |
3781 | idr_init(&cm.local_id_table); | |
f06d2653 | 3782 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
a977049d | 3783 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
8575329d | 3784 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d | 3785 | |
9af57b7a SH |
3786 | ret = class_register(&cm_class); |
3787 | if (ret) | |
a977049d HR |
3788 | return -ENOMEM; |
3789 | ||
9af57b7a SH |
3790 | cm.wq = create_workqueue("ib_cm"); |
3791 | if (!cm.wq) { | |
3792 | ret = -ENOMEM; | |
3793 | goto error1; | |
3794 | } | |
3795 | ||
a977049d HR |
3796 | ret = ib_register_client(&cm_client); |
3797 | if (ret) | |
9af57b7a | 3798 | goto error2; |
a977049d HR |
3799 | |
3800 | return 0; | |
9af57b7a | 3801 | error2: |
a977049d | 3802 | destroy_workqueue(cm.wq); |
9af57b7a SH |
3803 | error1: |
3804 | class_unregister(&cm_class); | |
a977049d HR |
3805 | return ret; |
3806 | } | |
3807 | ||
3808 | static void __exit ib_cm_cleanup(void) | |
3809 | { | |
8575329d SH |
3810 | struct cm_timewait_info *timewait_info, *tmp; |
3811 | ||
3812 | spin_lock_irq(&cm.lock); | |
3813 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3814 | cancel_delayed_work(&timewait_info->work.work); | |
3815 | spin_unlock_irq(&cm.lock); | |
3816 | ||
84ba284c | 3817 | ib_unregister_client(&cm_client); |
a977049d | 3818 | destroy_workqueue(cm.wq); |
8575329d SH |
3819 | |
3820 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3821 | list_del(&timewait_info->list); | |
3822 | kfree(timewait_info); | |
3823 | } | |
3824 | ||
9af57b7a | 3825 | class_unregister(&cm_class); |
5d7edb3c | 3826 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3827 | } |
3828 | ||
3829 | module_init(ib_cm_init); | |
3830 | module_exit(ib_cm_cleanup); | |
3831 |