Commit | Line | Data |
---|---|---|
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. | |
a977049d | 34 | */ |
1b52fa98 SH |
35 | |
36 | #include <linux/completion.h> | |
a977049d | 37 | #include <linux/dma-mapping.h> |
9af57b7a | 38 | #include <linux/device.h> |
e4dd23d7 | 39 | #include <linux/module.h> |
a977049d HR |
40 | #include <linux/err.h> |
41 | #include <linux/idr.h> | |
42 | #include <linux/interrupt.h> | |
f06d2653 | 43 | #include <linux/random.h> |
a977049d HR |
44 | #include <linux/rbtree.h> |
45 | #include <linux/spinlock.h> | |
5a0e3ad6 | 46 | #include <linux/slab.h> |
9af57b7a | 47 | #include <linux/sysfs.h> |
a977049d | 48 | #include <linux/workqueue.h> |
110cf374 | 49 | #include <linux/kdev_t.h> |
a977049d | 50 | |
a4d61e84 RD |
51 | #include <rdma/ib_cache.h> |
52 | #include <rdma/ib_cm.h> | |
a977049d HR |
53 | #include "cm_msgs.h" |
54 | ||
55 | MODULE_AUTHOR("Sean Hefty"); | |
56 | MODULE_DESCRIPTION("InfiniBand CM"); | |
57 | MODULE_LICENSE("Dual BSD/GPL"); | |
58 | ||
59 | static void cm_add_one(struct ib_device *device); | |
60 | static void cm_remove_one(struct ib_device *device); | |
61 | ||
62 | static struct ib_client cm_client = { | |
63 | .name = "cm", | |
64 | .add = cm_add_one, | |
65 | .remove = cm_remove_one | |
66 | }; | |
67 | ||
68 | static struct ib_cm { | |
69 | spinlock_t lock; | |
70 | struct list_head device_list; | |
71 | rwlock_t device_lock; | |
72 | struct rb_root listen_service_table; | |
73 | u64 listen_service_id; | |
74 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
75 | struct rb_root remote_qp_table; | |
76 | struct rb_root remote_id_table; | |
77 | struct rb_root remote_sidr_table; | |
78 | struct idr local_id_table; | |
f06d2653 | 79 | __be32 random_id_operand; |
8575329d | 80 | struct list_head timewait_list; |
a977049d HR |
81 | struct workqueue_struct *wq; |
82 | } cm; | |
83 | ||
9af57b7a SH |
84 | /* Counter indexes ordered by attribute ID */ |
85 | enum { | |
86 | CM_REQ_COUNTER, | |
87 | CM_MRA_COUNTER, | |
88 | CM_REJ_COUNTER, | |
89 | CM_REP_COUNTER, | |
90 | CM_RTU_COUNTER, | |
91 | CM_DREQ_COUNTER, | |
92 | CM_DREP_COUNTER, | |
93 | CM_SIDR_REQ_COUNTER, | |
94 | CM_SIDR_REP_COUNTER, | |
95 | CM_LAP_COUNTER, | |
96 | CM_APR_COUNTER, | |
97 | CM_ATTR_COUNT, | |
98 | CM_ATTR_ID_OFFSET = 0x0010, | |
99 | }; | |
100 | ||
101 | enum { | |
102 | CM_XMIT, | |
103 | CM_XMIT_RETRIES, | |
104 | CM_RECV, | |
105 | CM_RECV_DUPLICATES, | |
106 | CM_COUNTER_GROUPS | |
107 | }; | |
108 | ||
109 | static char const counter_group_names[CM_COUNTER_GROUPS] | |
110 | [sizeof("cm_rx_duplicates")] = { | |
111 | "cm_tx_msgs", "cm_tx_retries", | |
112 | "cm_rx_msgs", "cm_rx_duplicates" | |
113 | }; | |
114 | ||
115 | struct cm_counter_group { | |
116 | struct kobject obj; | |
117 | atomic_long_t counter[CM_ATTR_COUNT]; | |
118 | }; | |
119 | ||
120 | struct cm_counter_attribute { | |
121 | struct attribute attr; | |
122 | int index; | |
123 | }; | |
124 | ||
125 | #define CM_COUNTER_ATTR(_name, _index) \ | |
126 | struct cm_counter_attribute cm_##_name##_counter_attr = { \ | |
01e8ef11 | 127 | .attr = { .name = __stringify(_name), .mode = 0444 }, \ |
9af57b7a SH |
128 | .index = _index \ |
129 | } | |
130 | ||
131 | static CM_COUNTER_ATTR(req, CM_REQ_COUNTER); | |
132 | static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER); | |
133 | static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER); | |
134 | static CM_COUNTER_ATTR(rep, CM_REP_COUNTER); | |
135 | static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER); | |
136 | static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER); | |
137 | static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER); | |
138 | static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER); | |
139 | static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER); | |
140 | static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER); | |
141 | static CM_COUNTER_ATTR(apr, CM_APR_COUNTER); | |
142 | ||
143 | static struct attribute *cm_counter_default_attrs[] = { | |
144 | &cm_req_counter_attr.attr, | |
145 | &cm_mra_counter_attr.attr, | |
146 | &cm_rej_counter_attr.attr, | |
147 | &cm_rep_counter_attr.attr, | |
148 | &cm_rtu_counter_attr.attr, | |
149 | &cm_dreq_counter_attr.attr, | |
150 | &cm_drep_counter_attr.attr, | |
151 | &cm_sidr_req_counter_attr.attr, | |
152 | &cm_sidr_rep_counter_attr.attr, | |
153 | &cm_lap_counter_attr.attr, | |
154 | &cm_apr_counter_attr.attr, | |
155 | NULL | |
156 | }; | |
157 | ||
a977049d HR |
158 | struct cm_port { |
159 | struct cm_device *cm_dev; | |
160 | struct ib_mad_agent *mad_agent; | |
9af57b7a | 161 | struct kobject port_obj; |
a977049d | 162 | u8 port_num; |
9af57b7a | 163 | struct cm_counter_group counter_group[CM_COUNTER_GROUPS]; |
a977049d HR |
164 | }; |
165 | ||
166 | struct cm_device { | |
167 | struct list_head list; | |
d4c4196f | 168 | struct ib_device *ib_device; |
110cf374 | 169 | struct device *device; |
1d846126 | 170 | u8 ack_delay; |
9af57b7a | 171 | struct cm_port *port[0]; |
a977049d HR |
172 | }; |
173 | ||
174 | struct cm_av { | |
175 | struct cm_port *port; | |
176 | union ib_gid dgid; | |
177 | struct ib_ah_attr ah_attr; | |
178 | u16 pkey_index; | |
1d846126 | 179 | u8 timeout; |
a977049d HR |
180 | }; |
181 | ||
182 | struct cm_work { | |
c4028958 | 183 | struct delayed_work work; |
a977049d HR |
184 | struct list_head list; |
185 | struct cm_port *port; | |
186 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
187 | __be32 local_id; /* Established / timewait */ |
188 | __be32 remote_id; | |
a977049d HR |
189 | struct ib_cm_event cm_event; |
190 | struct ib_sa_path_rec path[0]; | |
191 | }; | |
192 | ||
193 | struct cm_timewait_info { | |
194 | struct cm_work work; /* Must be first. */ | |
8575329d | 195 | struct list_head list; |
a977049d HR |
196 | struct rb_node remote_qp_node; |
197 | struct rb_node remote_id_node; | |
97f52eb4 SH |
198 | __be64 remote_ca_guid; |
199 | __be32 remote_qpn; | |
a977049d HR |
200 | u8 inserted_remote_qp; |
201 | u8 inserted_remote_id; | |
202 | }; | |
203 | ||
204 | struct cm_id_private { | |
205 | struct ib_cm_id id; | |
206 | ||
207 | struct rb_node service_node; | |
208 | struct rb_node sidr_id_node; | |
87fd1a11 | 209 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 210 | struct completion comp; |
a977049d HR |
211 | atomic_t refcount; |
212 | ||
213 | struct ib_mad_send_buf *msg; | |
214 | struct cm_timewait_info *timewait_info; | |
215 | /* todo: use alternate port on send failure */ | |
216 | struct cm_av av; | |
217 | struct cm_av alt_av; | |
6e61d04f | 218 | struct ib_cm_compare_data *compare_data; |
a977049d HR |
219 | |
220 | void *private_data; | |
97f52eb4 SH |
221 | __be64 tid; |
222 | __be32 local_qpn; | |
223 | __be32 remote_qpn; | |
ae7971a7 | 224 | enum ib_qp_type qp_type; |
97f52eb4 SH |
225 | __be32 sq_psn; |
226 | __be32 rq_psn; | |
a977049d HR |
227 | int timeout_ms; |
228 | enum ib_mtu path_mtu; | |
e1444b5a | 229 | __be16 pkey; |
a977049d HR |
230 | u8 private_data_len; |
231 | u8 max_cm_retries; | |
232 | u8 peer_to_peer; | |
233 | u8 responder_resources; | |
234 | u8 initiator_depth; | |
a977049d HR |
235 | u8 retry_count; |
236 | u8 rnr_retry_count; | |
237 | u8 service_timeout; | |
1d846126 | 238 | u8 target_ack_delay; |
a977049d HR |
239 | |
240 | struct list_head work_list; | |
241 | atomic_t work_count; | |
242 | }; | |
243 | ||
c4028958 | 244 | static void cm_work_handler(struct work_struct *work); |
a977049d HR |
245 | |
246 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
247 | { | |
248 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 249 | complete(&cm_id_priv->comp); |
a977049d HR |
250 | } |
251 | ||
252 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
253 | struct ib_mad_send_buf **msg) | |
254 | { | |
255 | struct ib_mad_agent *mad_agent; | |
256 | struct ib_mad_send_buf *m; | |
257 | struct ib_ah *ah; | |
258 | ||
259 | mad_agent = cm_id_priv->av.port->mad_agent; | |
260 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
261 | if (IS_ERR(ah)) | |
262 | return PTR_ERR(ah); | |
263 | ||
3cd96564 | 264 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
354ba39c | 265 | cm_id_priv->av.pkey_index, |
34816ad9 | 266 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
267 | GFP_ATOMIC); |
268 | if (IS_ERR(m)) { | |
269 | ib_destroy_ah(ah); | |
270 | return PTR_ERR(m); | |
271 | } | |
272 | ||
273 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
274 | m->ah = ah; |
275 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
276 | |
277 | atomic_inc(&cm_id_priv->refcount); | |
278 | m->context[0] = cm_id_priv; | |
279 | *msg = m; | |
280 | return 0; | |
281 | } | |
282 | ||
283 | static int cm_alloc_response_msg(struct cm_port *port, | |
284 | struct ib_mad_recv_wc *mad_recv_wc, | |
285 | struct ib_mad_send_buf **msg) | |
286 | { | |
287 | struct ib_mad_send_buf *m; | |
288 | struct ib_ah *ah; | |
289 | ||
290 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
291 | mad_recv_wc->recv_buf.grh, port->port_num); | |
292 | if (IS_ERR(ah)) | |
293 | return PTR_ERR(ah); | |
294 | ||
295 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 296 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
297 | GFP_ATOMIC); |
298 | if (IS_ERR(m)) { | |
299 | ib_destroy_ah(ah); | |
300 | return PTR_ERR(m); | |
301 | } | |
34816ad9 | 302 | m->ah = ah; |
a977049d HR |
303 | *msg = m; |
304 | return 0; | |
305 | } | |
306 | ||
307 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
308 | { | |
34816ad9 | 309 | ib_destroy_ah(msg->ah); |
a977049d HR |
310 | if (msg->context[0]) |
311 | cm_deref_id(msg->context[0]); | |
312 | ib_free_send_mad(msg); | |
313 | } | |
314 | ||
315 | static void * cm_copy_private_data(const void *private_data, | |
316 | u8 private_data_len) | |
317 | { | |
318 | void *data; | |
319 | ||
320 | if (!private_data || !private_data_len) | |
321 | return NULL; | |
322 | ||
bed8bdfd | 323 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
a977049d HR |
324 | if (!data) |
325 | return ERR_PTR(-ENOMEM); | |
326 | ||
a977049d HR |
327 | return data; |
328 | } | |
329 | ||
330 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
331 | void *private_data, u8 private_data_len) | |
332 | { | |
333 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
334 | kfree(cm_id_priv->private_data); | |
335 | ||
336 | cm_id_priv->private_data = private_data; | |
337 | cm_id_priv->private_data_len = private_data_len; | |
338 | } | |
339 | ||
ca222c6b SH |
340 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
341 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
342 | { |
343 | av->port = port; | |
344 | av->pkey_index = wc->pkey_index; | |
d4c4196f | 345 | ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc, |
ca222c6b | 346 | grh, &av->ah_attr); |
a977049d HR |
347 | } |
348 | ||
349 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
350 | { | |
351 | struct cm_device *cm_dev; | |
352 | struct cm_port *port = NULL; | |
353 | unsigned long flags; | |
354 | int ret; | |
355 | u8 p; | |
356 | ||
357 | read_lock_irqsave(&cm.device_lock, flags); | |
358 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
d4c4196f | 359 | if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid, |
a977049d | 360 | &p, NULL)) { |
9af57b7a | 361 | port = cm_dev->port[p-1]; |
a977049d HR |
362 | break; |
363 | } | |
364 | } | |
365 | read_unlock_irqrestore(&cm.device_lock, flags); | |
366 | ||
367 | if (!port) | |
368 | return -EINVAL; | |
369 | ||
d4c4196f | 370 | ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num, |
a977049d HR |
371 | be16_to_cpu(path->pkey), &av->pkey_index); |
372 | if (ret) | |
373 | return ret; | |
374 | ||
375 | av->port = port; | |
d4c4196f | 376 | ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path, |
ca222c6b | 377 | &av->ah_attr); |
1d846126 | 378 | av->timeout = path->packet_life_time + 1; |
a977049d HR |
379 | return 0; |
380 | } | |
381 | ||
382 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
383 | { | |
384 | unsigned long flags; | |
f06d2653 | 385 | int ret, id; |
de1bb1a6 | 386 | static int next_id; |
a977049d HR |
387 | |
388 | do { | |
389 | spin_lock_irqsave(&cm.lock, flags); | |
f06d2653 | 390 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
9f81036c MT |
391 | next_id, &id); |
392 | if (!ret) | |
393 | next_id = ((unsigned) id + 1) & MAX_ID_MASK; | |
a977049d HR |
394 | spin_unlock_irqrestore(&cm.lock, flags); |
395 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
f06d2653 | 396 | |
1b90c137 | 397 | cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; |
a977049d HR |
398 | return ret; |
399 | } | |
400 | ||
97f52eb4 | 401 | static void cm_free_id(__be32 local_id) |
a977049d | 402 | { |
24be6e81 | 403 | spin_lock_irq(&cm.lock); |
f06d2653 SH |
404 | idr_remove(&cm.local_id_table, |
405 | (__force int) (local_id ^ cm.random_id_operand)); | |
24be6e81 | 406 | spin_unlock_irq(&cm.lock); |
a977049d HR |
407 | } |
408 | ||
97f52eb4 | 409 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
410 | { |
411 | struct cm_id_private *cm_id_priv; | |
412 | ||
f06d2653 SH |
413 | cm_id_priv = idr_find(&cm.local_id_table, |
414 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
415 | if (cm_id_priv) { |
416 | if (cm_id_priv->id.remote_id == remote_id) | |
417 | atomic_inc(&cm_id_priv->refcount); | |
418 | else | |
419 | cm_id_priv = NULL; | |
420 | } | |
421 | ||
422 | return cm_id_priv; | |
423 | } | |
424 | ||
97f52eb4 | 425 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
426 | { |
427 | struct cm_id_private *cm_id_priv; | |
a977049d | 428 | |
24be6e81 | 429 | spin_lock_irq(&cm.lock); |
a977049d | 430 | cm_id_priv = cm_get_id(local_id, remote_id); |
24be6e81 | 431 | spin_unlock_irq(&cm.lock); |
a977049d HR |
432 | |
433 | return cm_id_priv; | |
434 | } | |
435 | ||
6e61d04f SH |
436 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
437 | { | |
438 | int i; | |
439 | ||
440 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) | |
441 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & | |
442 | ((unsigned long *) mask)[i]; | |
443 | } | |
444 | ||
445 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
446 | struct ib_cm_compare_data *dst_data) | |
447 | { | |
448 | u8 src[IB_CM_COMPARE_SIZE]; | |
449 | u8 dst[IB_CM_COMPARE_SIZE]; | |
450 | ||
451 | if (!src_data || !dst_data) | |
452 | return 0; | |
453 | ||
454 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
455 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
456 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); | |
457 | } | |
458 | ||
459 | static int cm_compare_private_data(u8 *private_data, | |
460 | struct ib_cm_compare_data *dst_data) | |
461 | { | |
462 | u8 src[IB_CM_COMPARE_SIZE]; | |
463 | ||
464 | if (!dst_data) | |
465 | return 0; | |
466 | ||
467 | cm_mask_copy(src, private_data, dst_data->mask); | |
468 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); | |
469 | } | |
470 | ||
a88f4888 RD |
471 | /* |
472 | * Trivial helpers to strip endian annotation and compare; the | |
473 | * endianness doesn't actually matter since we just need a stable | |
474 | * order for the RB tree. | |
475 | */ | |
476 | static int be32_lt(__be32 a, __be32 b) | |
477 | { | |
478 | return (__force u32) a < (__force u32) b; | |
479 | } | |
480 | ||
481 | static int be32_gt(__be32 a, __be32 b) | |
482 | { | |
483 | return (__force u32) a > (__force u32) b; | |
484 | } | |
485 | ||
486 | static int be64_lt(__be64 a, __be64 b) | |
487 | { | |
488 | return (__force u64) a < (__force u64) b; | |
489 | } | |
490 | ||
491 | static int be64_gt(__be64 a, __be64 b) | |
492 | { | |
493 | return (__force u64) a > (__force u64) b; | |
494 | } | |
495 | ||
a977049d HR |
496 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
497 | { | |
498 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
499 | struct rb_node *parent = NULL; | |
500 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
501 | __be64 service_id = cm_id_priv->id.service_id; |
502 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 503 | int data_cmp; |
a977049d HR |
504 | |
505 | while (*link) { | |
506 | parent = *link; | |
507 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
508 | service_node); | |
6e61d04f SH |
509 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
510 | cur_cm_id_priv->compare_data); | |
a977049d | 511 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 512 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
513 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
514 | !data_cmp) | |
07d357d0 SH |
515 | return cur_cm_id_priv; |
516 | ||
517 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
518 | link = &(*link)->rb_left; | |
519 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
520 | link = &(*link)->rb_right; | |
a88f4888 | 521 | else if (be64_lt(service_id, cur_cm_id_priv->id.service_id)) |
a977049d | 522 | link = &(*link)->rb_left; |
a88f4888 | 523 | else if (be64_gt(service_id, cur_cm_id_priv->id.service_id)) |
6e61d04f SH |
524 | link = &(*link)->rb_right; |
525 | else if (data_cmp < 0) | |
526 | link = &(*link)->rb_left; | |
a977049d HR |
527 | else |
528 | link = &(*link)->rb_right; | |
529 | } | |
530 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
531 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
532 | return NULL; | |
533 | } | |
534 | ||
07d357d0 | 535 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f SH |
536 | __be64 service_id, |
537 | u8 *private_data) | |
a977049d HR |
538 | { |
539 | struct rb_node *node = cm.listen_service_table.rb_node; | |
540 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 541 | int data_cmp; |
a977049d HR |
542 | |
543 | while (node) { | |
544 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
545 | data_cmp = cm_compare_private_data(private_data, |
546 | cm_id_priv->compare_data); | |
a977049d | 547 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 548 | cm_id_priv->id.service_id && |
6e61d04f | 549 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 550 | return cm_id_priv; |
07d357d0 SH |
551 | |
552 | if (device < cm_id_priv->id.device) | |
553 | node = node->rb_left; | |
554 | else if (device > cm_id_priv->id.device) | |
555 | node = node->rb_right; | |
a88f4888 | 556 | else if (be64_lt(service_id, cm_id_priv->id.service_id)) |
a977049d | 557 | node = node->rb_left; |
a88f4888 | 558 | else if (be64_gt(service_id, cm_id_priv->id.service_id)) |
6e61d04f SH |
559 | node = node->rb_right; |
560 | else if (data_cmp < 0) | |
561 | node = node->rb_left; | |
a977049d HR |
562 | else |
563 | node = node->rb_right; | |
564 | } | |
565 | return NULL; | |
566 | } | |
567 | ||
568 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
569 | *timewait_info) | |
570 | { | |
571 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
572 | struct rb_node *parent = NULL; | |
573 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
574 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
575 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
576 | |
577 | while (*link) { | |
578 | parent = *link; | |
579 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
580 | remote_id_node); | |
a88f4888 | 581 | if (be32_lt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 582 | link = &(*link)->rb_left; |
a88f4888 | 583 | else if (be32_gt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 584 | link = &(*link)->rb_right; |
a88f4888 | 585 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 586 | link = &(*link)->rb_left; |
a88f4888 | 587 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
588 | link = &(*link)->rb_right; |
589 | else | |
590 | return cur_timewait_info; | |
591 | } | |
592 | timewait_info->inserted_remote_id = 1; | |
593 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
594 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
595 | return NULL; | |
596 | } | |
597 | ||
97f52eb4 SH |
598 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
599 | __be32 remote_id) | |
a977049d HR |
600 | { |
601 | struct rb_node *node = cm.remote_id_table.rb_node; | |
602 | struct cm_timewait_info *timewait_info; | |
603 | ||
604 | while (node) { | |
605 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
606 | remote_id_node); | |
a88f4888 | 607 | if (be32_lt(remote_id, timewait_info->work.remote_id)) |
a977049d | 608 | node = node->rb_left; |
a88f4888 | 609 | else if (be32_gt(remote_id, timewait_info->work.remote_id)) |
a977049d | 610 | node = node->rb_right; |
a88f4888 | 611 | else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d | 612 | node = node->rb_left; |
a88f4888 | 613 | else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d HR |
614 | node = node->rb_right; |
615 | else | |
616 | return timewait_info; | |
617 | } | |
618 | return NULL; | |
619 | } | |
620 | ||
621 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
622 | *timewait_info) | |
623 | { | |
624 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
625 | struct rb_node *parent = NULL; | |
626 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
627 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
628 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
629 | |
630 | while (*link) { | |
631 | parent = *link; | |
632 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
633 | remote_qp_node); | |
a88f4888 | 634 | if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 635 | link = &(*link)->rb_left; |
a88f4888 | 636 | else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 637 | link = &(*link)->rb_right; |
a88f4888 | 638 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 639 | link = &(*link)->rb_left; |
a88f4888 | 640 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
641 | link = &(*link)->rb_right; |
642 | else | |
643 | return cur_timewait_info; | |
644 | } | |
645 | timewait_info->inserted_remote_qp = 1; | |
646 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
647 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
648 | return NULL; | |
649 | } | |
650 | ||
651 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
652 | *cm_id_priv) | |
653 | { | |
654 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
655 | struct rb_node *parent = NULL; | |
656 | struct cm_id_private *cur_cm_id_priv; | |
657 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 658 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
659 | |
660 | while (*link) { | |
661 | parent = *link; | |
662 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
663 | sidr_id_node); | |
a88f4888 | 664 | if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d | 665 | link = &(*link)->rb_left; |
a88f4888 | 666 | else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d HR |
667 | link = &(*link)->rb_right; |
668 | else { | |
669 | int cmp; | |
670 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
671 | sizeof *port_gid); | |
672 | if (cmp < 0) | |
673 | link = &(*link)->rb_left; | |
674 | else if (cmp > 0) | |
675 | link = &(*link)->rb_right; | |
676 | else | |
677 | return cur_cm_id_priv; | |
678 | } | |
679 | } | |
680 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
681 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
682 | return NULL; | |
683 | } | |
684 | ||
685 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
686 | enum ib_cm_sidr_status status) | |
687 | { | |
688 | struct ib_cm_sidr_rep_param param; | |
689 | ||
690 | memset(¶m, 0, sizeof param); | |
691 | param.status = status; | |
692 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
693 | } | |
694 | ||
07d357d0 SH |
695 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
696 | ib_cm_handler cm_handler, | |
a977049d HR |
697 | void *context) |
698 | { | |
699 | struct cm_id_private *cm_id_priv; | |
700 | int ret; | |
701 | ||
de6eb66b | 702 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
703 | if (!cm_id_priv) |
704 | return ERR_PTR(-ENOMEM); | |
705 | ||
a977049d | 706 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 707 | cm_id_priv->id.device = device; |
a977049d HR |
708 | cm_id_priv->id.cm_handler = cm_handler; |
709 | cm_id_priv->id.context = context; | |
354ba39c | 710 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
711 | ret = cm_alloc_id(cm_id_priv); |
712 | if (ret) | |
713 | goto error; | |
714 | ||
715 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 716 | init_completion(&cm_id_priv->comp); |
a977049d HR |
717 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
718 | atomic_set(&cm_id_priv->work_count, -1); | |
719 | atomic_set(&cm_id_priv->refcount, 1); | |
720 | return &cm_id_priv->id; | |
721 | ||
722 | error: | |
723 | kfree(cm_id_priv); | |
724 | return ERR_PTR(-ENOMEM); | |
725 | } | |
726 | EXPORT_SYMBOL(ib_create_cm_id); | |
727 | ||
728 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
729 | { | |
730 | struct cm_work *work; | |
731 | ||
732 | if (list_empty(&cm_id_priv->work_list)) | |
733 | return NULL; | |
734 | ||
735 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
736 | list_del(&work->list); | |
737 | return work; | |
738 | } | |
739 | ||
740 | static void cm_free_work(struct cm_work *work) | |
741 | { | |
742 | if (work->mad_recv_wc) | |
743 | ib_free_recv_mad(work->mad_recv_wc); | |
744 | kfree(work); | |
745 | } | |
746 | ||
747 | static inline int cm_convert_to_ms(int iba_time) | |
748 | { | |
749 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
750 | return 1 << max(iba_time - 8, 0); | |
751 | } | |
752 | ||
1d846126 SH |
753 | /* |
754 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time | |
755 | * Because of how ack_timeout is stored, adding one doubles the timeout. | |
756 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and | |
757 | * increment it (round up) only if the other is within 50%. | |
758 | */ | |
759 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) | |
760 | { | |
761 | int ack_timeout = packet_life_time + 1; | |
762 | ||
763 | if (ack_timeout >= ca_ack_delay) | |
764 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); | |
765 | else | |
766 | ack_timeout = ca_ack_delay + | |
767 | (ack_timeout >= (ca_ack_delay - 1)); | |
768 | ||
769 | return min(31, ack_timeout); | |
770 | } | |
771 | ||
a977049d HR |
772 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
773 | { | |
a977049d HR |
774 | if (timewait_info->inserted_remote_id) { |
775 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
776 | timewait_info->inserted_remote_id = 0; | |
777 | } | |
778 | ||
779 | if (timewait_info->inserted_remote_qp) { | |
780 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
781 | timewait_info->inserted_remote_qp = 0; | |
782 | } | |
a977049d HR |
783 | } |
784 | ||
97f52eb4 | 785 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
786 | { |
787 | struct cm_timewait_info *timewait_info; | |
788 | ||
de6eb66b | 789 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
790 | if (!timewait_info) |
791 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
792 | |
793 | timewait_info->work.local_id = local_id; | |
c4028958 | 794 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
a977049d HR |
795 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
796 | return timewait_info; | |
797 | } | |
798 | ||
799 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
800 | { | |
801 | int wait_time; | |
8575329d | 802 | unsigned long flags; |
a977049d | 803 | |
8575329d | 804 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 805 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
806 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
807 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 808 | |
a977049d HR |
809 | /* |
810 | * The cm_id could be destroyed by the user before we exit timewait. | |
811 | * To protect against this, we search for the cm_id after exiting | |
812 | * timewait before notifying the user that we've exited timewait. | |
813 | */ | |
814 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
1d846126 | 815 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d HR |
816 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
817 | msecs_to_jiffies(wait_time)); | |
818 | cm_id_priv->timewait_info = NULL; | |
819 | } | |
820 | ||
821 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
822 | { | |
8575329d SH |
823 | unsigned long flags; |
824 | ||
a977049d HR |
825 | cm_id_priv->id.state = IB_CM_IDLE; |
826 | if (cm_id_priv->timewait_info) { | |
8575329d | 827 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 828 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 829 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
830 | kfree(cm_id_priv->timewait_info); |
831 | cm_id_priv->timewait_info = NULL; | |
832 | } | |
833 | } | |
834 | ||
04c33543 | 835 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
836 | { |
837 | struct cm_id_private *cm_id_priv; | |
838 | struct cm_work *work; | |
a977049d HR |
839 | |
840 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
841 | retest: | |
24be6e81 | 842 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
843 | switch (cm_id->state) { |
844 | case IB_CM_LISTEN: | |
845 | cm_id->state = IB_CM_IDLE; | |
24be6e81 SH |
846 | spin_unlock_irq(&cm_id_priv->lock); |
847 | spin_lock_irq(&cm.lock); | |
a977049d | 848 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
24be6e81 | 849 | spin_unlock_irq(&cm.lock); |
a977049d HR |
850 | break; |
851 | case IB_CM_SIDR_REQ_SENT: | |
852 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 853 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 854 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
855 | break; |
856 | case IB_CM_SIDR_REQ_RCVD: | |
24be6e81 | 857 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
858 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
859 | break; | |
860 | case IB_CM_REQ_SENT: | |
227eca83 | 861 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 862 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 | 863 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
e971b8cd SH |
864 | &cm_id_priv->id.device->node_guid, |
865 | sizeof cm_id_priv->id.device->node_guid, | |
227eca83 SH |
866 | NULL, 0); |
867 | break; | |
04c33543 MT |
868 | case IB_CM_REQ_RCVD: |
869 | if (err == -ENOMEM) { | |
870 | /* Do not reject to allow future retries. */ | |
871 | cm_reset_to_idle(cm_id_priv); | |
24be6e81 | 872 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 | 873 | } else { |
24be6e81 | 874 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 MT |
875 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
876 | NULL, 0, NULL, 0); | |
877 | } | |
878 | break; | |
a977049d HR |
879 | case IB_CM_MRA_REQ_RCVD: |
880 | case IB_CM_REP_SENT: | |
881 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 882 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 883 | /* Fall through */ |
a977049d HR |
884 | case IB_CM_MRA_REQ_SENT: |
885 | case IB_CM_REP_RCVD: | |
886 | case IB_CM_MRA_REP_SENT: | |
24be6e81 | 887 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 SH |
888 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
889 | NULL, 0, NULL, 0); | |
a977049d HR |
890 | break; |
891 | case IB_CM_ESTABLISHED: | |
24be6e81 | 892 | spin_unlock_irq(&cm_id_priv->lock); |
2622e18e SH |
893 | if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) |
894 | break; | |
a977049d HR |
895 | ib_send_cm_dreq(cm_id, NULL, 0); |
896 | goto retest; | |
897 | case IB_CM_DREQ_SENT: | |
34816ad9 | 898 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 899 | cm_enter_timewait(cm_id_priv); |
24be6e81 | 900 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
901 | break; |
902 | case IB_CM_DREQ_RCVD: | |
24be6e81 | 903 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
904 | ib_send_cm_drep(cm_id, NULL, 0); |
905 | break; | |
906 | default: | |
24be6e81 | 907 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
908 | break; |
909 | } | |
910 | ||
911 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
912 | cm_deref_id(cm_id_priv); |
913 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
914 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
915 | cm_free_work(work); | |
6e61d04f SH |
916 | kfree(cm_id_priv->compare_data); |
917 | kfree(cm_id_priv->private_data); | |
a977049d HR |
918 | kfree(cm_id_priv); |
919 | } | |
04c33543 MT |
920 | |
921 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
922 | { | |
923 | cm_destroy_id(cm_id, 0); | |
924 | } | |
a977049d HR |
925 | EXPORT_SYMBOL(ib_destroy_cm_id); |
926 | ||
6e61d04f SH |
927 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
928 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
929 | { |
930 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
931 | unsigned long flags; | |
932 | int ret = 0; | |
933 | ||
9c3da099 | 934 | service_mask = service_mask ? service_mask : ~cpu_to_be64(0); |
a977049d HR |
935 | service_id &= service_mask; |
936 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
937 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
938 | return -EINVAL; | |
939 | ||
940 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
941 | if (cm_id->state != IB_CM_IDLE) |
942 | return -EINVAL; | |
943 | ||
944 | if (compare_data) { | |
945 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
946 | GFP_KERNEL); | |
947 | if (!cm_id_priv->compare_data) | |
948 | return -ENOMEM; | |
949 | cm_mask_copy(cm_id_priv->compare_data->data, | |
950 | compare_data->data, compare_data->mask); | |
951 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
952 | IB_CM_COMPARE_SIZE); | |
953 | } | |
a977049d HR |
954 | |
955 | cm_id->state = IB_CM_LISTEN; | |
956 | ||
957 | spin_lock_irqsave(&cm.lock, flags); | |
958 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 | 959 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
9c3da099 | 960 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
961 | } else { |
962 | cm_id->service_id = service_id; | |
963 | cm_id->service_mask = service_mask; | |
964 | } | |
965 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
966 | spin_unlock_irqrestore(&cm.lock, flags); | |
967 | ||
968 | if (cur_cm_id_priv) { | |
969 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
970 | kfree(cm_id_priv->compare_data); |
971 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
972 | ret = -EBUSY; |
973 | } | |
974 | return ret; | |
975 | } | |
976 | EXPORT_SYMBOL(ib_cm_listen); | |
977 | ||
97f52eb4 SH |
978 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
979 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
980 | { |
981 | u64 hi_tid, low_tid; | |
982 | ||
983 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
984 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
985 | (msg_seq << 30)); | |
a977049d HR |
986 | return cpu_to_be64(hi_tid | low_tid); |
987 | } | |
988 | ||
989 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 990 | __be16 attr_id, __be64 tid) |
a977049d HR |
991 | { |
992 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
993 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
994 | hdr->class_version = IB_CM_CLASS_VERSION; | |
995 | hdr->method = IB_MGMT_METHOD_SEND; | |
996 | hdr->attr_id = attr_id; | |
997 | hdr->tid = tid; | |
998 | } | |
999 | ||
1000 | static void cm_format_req(struct cm_req_msg *req_msg, | |
1001 | struct cm_id_private *cm_id_priv, | |
1002 | struct ib_cm_req_param *param) | |
1003 | { | |
3971c9f6 SH |
1004 | struct ib_sa_path_rec *pri_path = param->primary_path; |
1005 | struct ib_sa_path_rec *alt_path = param->alternate_path; | |
1006 | ||
a977049d HR |
1007 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
1008 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
1009 | ||
1010 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
1011 | req_msg->service_id = param->service_id; | |
e971b8cd | 1012 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1013 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
a977049d HR |
1014 | cm_req_set_init_depth(req_msg, param->initiator_depth); |
1015 | cm_req_set_remote_resp_timeout(req_msg, | |
1016 | param->remote_cm_response_timeout); | |
1017 | cm_req_set_qp_type(req_msg, param->qp_type); | |
1018 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
1019 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
1020 | cm_req_set_local_resp_timeout(req_msg, | |
1021 | param->local_cm_response_timeout); | |
a977049d HR |
1022 | req_msg->pkey = param->primary_path->pkey; |
1023 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
a977049d | 1024 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); |
d26a360b SH |
1025 | |
1026 | if (param->qp_type != IB_QPT_XRC_INI) { | |
1027 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
1028 | cm_req_set_retry_count(req_msg, param->retry_count); | |
1029 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
1030 | cm_req_set_srq(req_msg, param->srq); | |
1031 | } | |
a977049d | 1032 | |
3971c9f6 SH |
1033 | if (pri_path->hop_limit <= 1) { |
1034 | req_msg->primary_local_lid = pri_path->slid; | |
1035 | req_msg->primary_remote_lid = pri_path->dlid; | |
1036 | } else { | |
1037 | /* Work-around until there's a way to obtain remote LID info */ | |
1038 | req_msg->primary_local_lid = IB_LID_PERMISSIVE; | |
1039 | req_msg->primary_remote_lid = IB_LID_PERMISSIVE; | |
1040 | } | |
1041 | req_msg->primary_local_gid = pri_path->sgid; | |
1042 | req_msg->primary_remote_gid = pri_path->dgid; | |
1043 | cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); | |
1044 | cm_req_set_primary_packet_rate(req_msg, pri_path->rate); | |
1045 | req_msg->primary_traffic_class = pri_path->traffic_class; | |
1046 | req_msg->primary_hop_limit = pri_path->hop_limit; | |
1047 | cm_req_set_primary_sl(req_msg, pri_path->sl); | |
1048 | cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); | |
a977049d | 1049 | cm_req_set_primary_local_ack_timeout(req_msg, |
1d846126 | 1050 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1051 | pri_path->packet_life_time)); |
a977049d | 1052 | |
3971c9f6 SH |
1053 | if (alt_path) { |
1054 | if (alt_path->hop_limit <= 1) { | |
1055 | req_msg->alt_local_lid = alt_path->slid; | |
1056 | req_msg->alt_remote_lid = alt_path->dlid; | |
1057 | } else { | |
1058 | req_msg->alt_local_lid = IB_LID_PERMISSIVE; | |
1059 | req_msg->alt_remote_lid = IB_LID_PERMISSIVE; | |
1060 | } | |
1061 | req_msg->alt_local_gid = alt_path->sgid; | |
1062 | req_msg->alt_remote_gid = alt_path->dgid; | |
a977049d | 1063 | cm_req_set_alt_flow_label(req_msg, |
3971c9f6 SH |
1064 | alt_path->flow_label); |
1065 | cm_req_set_alt_packet_rate(req_msg, alt_path->rate); | |
1066 | req_msg->alt_traffic_class = alt_path->traffic_class; | |
1067 | req_msg->alt_hop_limit = alt_path->hop_limit; | |
1068 | cm_req_set_alt_sl(req_msg, alt_path->sl); | |
1069 | cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); | |
a977049d | 1070 | cm_req_set_alt_local_ack_timeout(req_msg, |
1d846126 | 1071 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1072 | alt_path->packet_life_time)); |
a977049d HR |
1073 | } |
1074 | ||
1075 | if (param->private_data && param->private_data_len) | |
1076 | memcpy(req_msg->private_data, param->private_data, | |
1077 | param->private_data_len); | |
1078 | } | |
1079 | ||
858119e1 | 1080 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
1081 | { |
1082 | /* peer-to-peer not supported */ | |
1083 | if (param->peer_to_peer) | |
1084 | return -EINVAL; | |
1085 | ||
1086 | if (!param->primary_path) | |
1087 | return -EINVAL; | |
1088 | ||
d26a360b SH |
1089 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC && |
1090 | param->qp_type != IB_QPT_XRC_INI) | |
a977049d HR |
1091 | return -EINVAL; |
1092 | ||
1093 | if (param->private_data && | |
1094 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
1095 | return -EINVAL; | |
1096 | ||
1097 | if (param->alternate_path && | |
1098 | (param->alternate_path->pkey != param->primary_path->pkey || | |
1099 | param->alternate_path->mtu != param->primary_path->mtu)) | |
1100 | return -EINVAL; | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
1106 | struct ib_cm_req_param *param) | |
1107 | { | |
1108 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1109 | struct cm_req_msg *req_msg; |
1110 | unsigned long flags; | |
1111 | int ret; | |
1112 | ||
1113 | ret = cm_validate_req_param(param); | |
1114 | if (ret) | |
1115 | return ret; | |
1116 | ||
1117 | /* Verify that we're not in timewait. */ | |
1118 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1119 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1120 | if (cm_id->state != IB_CM_IDLE) { | |
1121 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1122 | ret = -EINVAL; | |
1123 | goto out; | |
1124 | } | |
1125 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1126 | ||
1127 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1128 | id.local_id); | |
75df23e2 SH |
1129 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1130 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 1131 | goto out; |
75df23e2 | 1132 | } |
a977049d HR |
1133 | |
1134 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
1135 | if (ret) | |
1136 | goto error1; | |
1137 | if (param->alternate_path) { | |
1138 | ret = cm_init_av_by_path(param->alternate_path, | |
1139 | &cm_id_priv->alt_av); | |
1140 | if (ret) | |
1141 | goto error1; | |
1142 | } | |
1143 | cm_id->service_id = param->service_id; | |
9c3da099 | 1144 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
1145 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1146 | param->primary_path->packet_life_time) * 2 + | |
1147 | cm_convert_to_ms( | |
1148 | param->remote_cm_response_timeout); | |
1149 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1150 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1151 | cm_id_priv->responder_resources = param->responder_resources; | |
1152 | cm_id_priv->retry_count = param->retry_count; | |
1153 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1154 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1155 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1156 | |
1157 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1158 | if (ret) | |
1159 | goto error1; | |
1160 | ||
1161 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1162 | cm_format_req(req_msg, cm_id_priv, param); | |
1163 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1164 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1165 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1166 | ||
1167 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1168 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
a977049d HR |
1169 | |
1170 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1171 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1172 | if (ret) { |
1173 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1174 | goto error2; | |
1175 | } | |
1176 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1177 | cm_id->state = IB_CM_REQ_SENT; | |
1178 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1179 | return 0; | |
1180 | ||
1181 | error2: cm_free_msg(cm_id_priv->msg); | |
1182 | error1: kfree(cm_id_priv->timewait_info); | |
1183 | out: return ret; | |
1184 | } | |
1185 | EXPORT_SYMBOL(ib_send_cm_req); | |
1186 | ||
1187 | static int cm_issue_rej(struct cm_port *port, | |
1188 | struct ib_mad_recv_wc *mad_recv_wc, | |
1189 | enum ib_cm_rej_reason reason, | |
1190 | enum cm_msg_response msg_rejected, | |
1191 | void *ari, u8 ari_length) | |
1192 | { | |
1193 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1194 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1195 | int ret; | |
1196 | ||
1197 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1198 | if (ret) | |
1199 | return ret; | |
1200 | ||
1201 | /* We just need common CM header information. Cast to any message. */ | |
1202 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1203 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1204 | ||
1205 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1206 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1207 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1208 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1209 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1210 | |
1211 | if (ari && ari_length) { | |
1212 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1213 | memcpy(rej_msg->ari, ari, ari_length); | |
1214 | } | |
1215 | ||
34816ad9 | 1216 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1217 | if (ret) |
1218 | cm_free_msg(msg); | |
1219 | ||
1220 | return ret; | |
1221 | } | |
1222 | ||
97f52eb4 SH |
1223 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1224 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1225 | { |
1226 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1227 | ((local_ca_guid == remote_ca_guid) && | |
1228 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1229 | } | |
1230 | ||
858119e1 | 1231 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1232 | struct ib_sa_path_rec *primary_path, |
1233 | struct ib_sa_path_rec *alt_path) | |
1234 | { | |
1235 | memset(primary_path, 0, sizeof *primary_path); | |
1236 | primary_path->dgid = req_msg->primary_local_gid; | |
1237 | primary_path->sgid = req_msg->primary_remote_gid; | |
1238 | primary_path->dlid = req_msg->primary_local_lid; | |
1239 | primary_path->slid = req_msg->primary_remote_lid; | |
1240 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1241 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1242 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1243 | primary_path->reversible = 1; | |
1244 | primary_path->pkey = req_msg->pkey; | |
1245 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1246 | primary_path->mtu_selector = IB_SA_EQ; | |
1247 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1248 | primary_path->rate_selector = IB_SA_EQ; | |
1249 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1250 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1251 | primary_path->packet_life_time = | |
1252 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1253 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1254 | ||
1255 | if (req_msg->alt_local_lid) { | |
1256 | memset(alt_path, 0, sizeof *alt_path); | |
1257 | alt_path->dgid = req_msg->alt_local_gid; | |
1258 | alt_path->sgid = req_msg->alt_remote_gid; | |
1259 | alt_path->dlid = req_msg->alt_local_lid; | |
1260 | alt_path->slid = req_msg->alt_remote_lid; | |
1261 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1262 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1263 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1264 | alt_path->reversible = 1; | |
1265 | alt_path->pkey = req_msg->pkey; | |
1266 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1267 | alt_path->mtu_selector = IB_SA_EQ; | |
1268 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1269 | alt_path->rate_selector = IB_SA_EQ; | |
1270 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1271 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1272 | alt_path->packet_life_time = | |
1273 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1274 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | static void cm_format_req_event(struct cm_work *work, | |
1279 | struct cm_id_private *cm_id_priv, | |
1280 | struct ib_cm_id *listen_id) | |
1281 | { | |
1282 | struct cm_req_msg *req_msg; | |
1283 | struct ib_cm_req_event_param *param; | |
1284 | ||
1285 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1286 | param = &work->cm_event.param.req_rcvd; | |
1287 | param->listen_id = listen_id; | |
a977049d HR |
1288 | param->port = cm_id_priv->av.port->port_num; |
1289 | param->primary_path = &work->path[0]; | |
1290 | if (req_msg->alt_local_lid) | |
1291 | param->alternate_path = &work->path[1]; | |
1292 | else | |
1293 | param->alternate_path = NULL; | |
1294 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1295 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1296 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1297 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1298 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1299 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1300 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1301 | param->local_cm_response_timeout = | |
1302 | cm_req_get_remote_resp_timeout(req_msg); | |
1303 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1304 | param->remote_cm_response_timeout = | |
1305 | cm_req_get_local_resp_timeout(req_msg); | |
1306 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1307 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1308 | param->srq = cm_req_get_srq(req_msg); | |
1309 | work->cm_event.private_data = &req_msg->private_data; | |
1310 | } | |
1311 | ||
1312 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1313 | struct cm_work *work) | |
1314 | { | |
a977049d HR |
1315 | int ret; |
1316 | ||
1317 | /* We will typically only have the current event to report. */ | |
1318 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1319 | cm_free_work(work); | |
1320 | ||
1321 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1322 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1323 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1324 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1325 | BUG_ON(!work); |
1326 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1327 | &work->cm_event); | |
1328 | cm_free_work(work); | |
1329 | } | |
1330 | cm_deref_id(cm_id_priv); | |
1331 | if (ret) | |
04c33543 | 1332 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1333 | } |
1334 | ||
1335 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1336 | struct cm_id_private *cm_id_priv, | |
1337 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1338 | const void *private_data, u8 private_data_len) | |
1339 | { | |
1340 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1341 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1342 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1343 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1344 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1345 | ||
1346 | if (private_data && private_data_len) | |
1347 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1348 | } | |
1349 | ||
1350 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1351 | struct cm_id_private *cm_id_priv, | |
1352 | enum ib_cm_rej_reason reason, | |
1353 | void *ari, | |
1354 | u8 ari_length, | |
1355 | const void *private_data, | |
1356 | u8 private_data_len) | |
1357 | { | |
1358 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1359 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1360 | ||
1361 | switch(cm_id_priv->id.state) { | |
1362 | case IB_CM_REQ_RCVD: | |
1363 | rej_msg->local_comm_id = 0; | |
1364 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1365 | break; | |
1366 | case IB_CM_MRA_REQ_SENT: | |
1367 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1368 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1369 | break; | |
1370 | case IB_CM_REP_RCVD: | |
1371 | case IB_CM_MRA_REP_SENT: | |
1372 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1373 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1374 | break; | |
1375 | default: | |
1376 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1377 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1378 | break; | |
1379 | } | |
1380 | ||
97f52eb4 | 1381 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1382 | if (ari && ari_length) { |
1383 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1384 | memcpy(rej_msg->ari, ari, ari_length); | |
1385 | } | |
1386 | ||
1387 | if (private_data && private_data_len) | |
1388 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1389 | } | |
1390 | ||
1391 | static void cm_dup_req_handler(struct cm_work *work, | |
1392 | struct cm_id_private *cm_id_priv) | |
1393 | { | |
1394 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1395 | int ret; |
1396 | ||
9af57b7a SH |
1397 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1398 | counter[CM_REQ_COUNTER]); | |
1399 | ||
a977049d HR |
1400 | /* Quick state check to discard duplicate REQs. */ |
1401 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1402 | return; | |
1403 | ||
1404 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1405 | if (ret) | |
1406 | return; | |
1407 | ||
24be6e81 | 1408 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1409 | switch (cm_id_priv->id.state) { |
1410 | case IB_CM_MRA_REQ_SENT: | |
1411 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1412 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1413 | cm_id_priv->private_data, | |
1414 | cm_id_priv->private_data_len); | |
1415 | break; | |
1416 | case IB_CM_TIMEWAIT: | |
1417 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1418 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1419 | break; | |
1420 | default: | |
1421 | goto unlock; | |
1422 | } | |
24be6e81 | 1423 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1424 | |
34816ad9 | 1425 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1426 | if (ret) |
1427 | goto free; | |
1428 | return; | |
1429 | ||
24be6e81 | 1430 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1431 | free: cm_free_msg(msg); |
1432 | } | |
1433 | ||
1434 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1435 | struct cm_id_private *cm_id_priv) | |
1436 | { | |
1437 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1438 | struct cm_timewait_info *timewait_info; | |
1439 | struct cm_req_msg *req_msg; | |
a977049d HR |
1440 | |
1441 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1442 | ||
d998ccce | 1443 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1444 | spin_lock_irq(&cm.lock); |
a977049d | 1445 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d HR |
1446 | if (timewait_info) { |
1447 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1448 | timewait_info->work.remote_id); | |
24be6e81 | 1449 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1450 | if (cur_cm_id_priv) { |
1451 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1452 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1453 | } |
1454 | return NULL; | |
1455 | } | |
1456 | ||
1457 | /* Check for stale connections. */ | |
1458 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1459 | if (timewait_info) { | |
1460 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
24be6e81 | 1461 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1462 | cm_issue_rej(work->port, work->mad_recv_wc, |
1463 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1464 | NULL, 0); | |
1465 | return NULL; | |
a977049d HR |
1466 | } |
1467 | ||
1468 | /* Find matching listen request. */ | |
07d357d0 | 1469 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1470 | req_msg->service_id, |
1471 | req_msg->private_data); | |
a977049d | 1472 | if (!listen_cm_id_priv) { |
8575329d | 1473 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
24be6e81 | 1474 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1475 | cm_issue_rej(work->port, work->mad_recv_wc, |
1476 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1477 | NULL, 0); | |
8575329d | 1478 | goto out; |
a977049d HR |
1479 | } |
1480 | atomic_inc(&listen_cm_id_priv->refcount); | |
1481 | atomic_inc(&cm_id_priv->refcount); | |
1482 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1483 | atomic_inc(&cm_id_priv->work_count); | |
24be6e81 | 1484 | spin_unlock_irq(&cm.lock); |
8575329d | 1485 | out: |
a977049d | 1486 | return listen_cm_id_priv; |
a977049d HR |
1487 | } |
1488 | ||
3971c9f6 SH |
1489 | /* |
1490 | * Work-around for inter-subnet connections. If the LIDs are permissive, | |
1491 | * we need to override the LID/SL data in the REQ with the LID information | |
1492 | * in the work completion. | |
1493 | */ | |
1494 | static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) | |
1495 | { | |
1496 | if (!cm_req_get_primary_subnet_local(req_msg)) { | |
1497 | if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { | |
1498 | req_msg->primary_local_lid = cpu_to_be16(wc->slid); | |
1499 | cm_req_set_primary_sl(req_msg, wc->sl); | |
1500 | } | |
1501 | ||
1502 | if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) | |
1503 | req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1504 | } | |
1505 | ||
1506 | if (!cm_req_get_alt_subnet_local(req_msg)) { | |
1507 | if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { | |
1508 | req_msg->alt_local_lid = cpu_to_be16(wc->slid); | |
1509 | cm_req_set_alt_sl(req_msg, wc->sl); | |
1510 | } | |
1511 | ||
1512 | if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) | |
1513 | req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1514 | } | |
1515 | } | |
1516 | ||
a977049d HR |
1517 | static int cm_req_handler(struct cm_work *work) |
1518 | { | |
1519 | struct ib_cm_id *cm_id; | |
1520 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1521 | struct cm_req_msg *req_msg; | |
1522 | int ret; | |
1523 | ||
1524 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1525 | ||
d4c4196f | 1526 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
1527 | if (IS_ERR(cm_id)) |
1528 | return PTR_ERR(cm_id); | |
1529 | ||
1530 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1531 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1532 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1533 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1534 | &cm_id_priv->av); |
1535 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1536 | id.local_id); | |
1537 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1538 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1539 | goto destroy; |
a977049d HR |
1540 | } |
1541 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1542 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1543 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1544 | ||
1545 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1546 | if (!listen_cm_id_priv) { | |
1547 | ret = -EINVAL; | |
76842405 SH |
1548 | kfree(cm_id_priv->timewait_info); |
1549 | goto destroy; | |
a977049d HR |
1550 | } |
1551 | ||
1552 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1553 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1554 | cm_id_priv->id.service_id = req_msg->service_id; | |
9c3da099 | 1555 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d | 1556 | |
3971c9f6 | 1557 | cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
a977049d HR |
1558 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
1559 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
76842405 | 1560 | if (ret) { |
d4c4196f | 1561 | ib_get_cached_gid(work->port->cm_dev->ib_device, |
76842405 SH |
1562 | work->port->port_num, 0, &work->path[0].sgid); |
1563 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1564 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1565 | NULL, 0); | |
1566 | goto rejected; | |
1567 | } | |
a977049d HR |
1568 | if (req_msg->alt_local_lid) { |
1569 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1570 | if (ret) { |
1571 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1572 | &work->path[0].sgid, | |
1573 | sizeof work->path[0].sgid, NULL, 0); | |
1574 | goto rejected; | |
1575 | } | |
a977049d HR |
1576 | } |
1577 | cm_id_priv->tid = req_msg->hdr.tid; | |
1578 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1579 | cm_req_get_local_resp_timeout(req_msg)); | |
1580 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1581 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1582 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1583 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1584 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
e1444b5a | 1585 | cm_id_priv->pkey = req_msg->pkey; |
a977049d | 1586 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
a977049d HR |
1587 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
1588 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1589 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1590 | |
1591 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1592 | cm_process_work(cm_id_priv, work); | |
1593 | cm_deref_id(listen_cm_id_priv); | |
1594 | return 0; | |
1595 | ||
76842405 SH |
1596 | rejected: |
1597 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1598 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1599 | destroy: |
1600 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1601 | return ret; |
1602 | } | |
1603 | ||
1604 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1605 | struct cm_id_private *cm_id_priv, | |
1606 | struct ib_cm_rep_param *param) | |
1607 | { | |
1608 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1609 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1610 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
a977049d HR |
1611 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); |
1612 | rep_msg->resp_resources = param->responder_resources; | |
1d846126 SH |
1613 | cm_rep_set_target_ack_delay(rep_msg, |
1614 | cm_id_priv->av.port->cm_dev->ack_delay); | |
a977049d | 1615 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
a977049d | 1616 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); |
e971b8cd | 1617 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1618 | |
d26a360b SH |
1619 | if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) { |
1620 | rep_msg->initiator_depth = param->initiator_depth; | |
1621 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1622 | cm_rep_set_srq(rep_msg, param->srq); | |
ef700446 | 1623 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1624 | } else { |
1625 | cm_rep_set_srq(rep_msg, 1); | |
ef700446 | 1626 | cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1627 | } |
1628 | ||
a977049d HR |
1629 | if (param->private_data && param->private_data_len) |
1630 | memcpy(rep_msg->private_data, param->private_data, | |
1631 | param->private_data_len); | |
1632 | } | |
1633 | ||
1634 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1635 | struct ib_cm_rep_param *param) | |
1636 | { | |
1637 | struct cm_id_private *cm_id_priv; | |
1638 | struct ib_mad_send_buf *msg; | |
1639 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1640 | unsigned long flags; |
1641 | int ret; | |
1642 | ||
1643 | if (param->private_data && | |
1644 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1645 | return -EINVAL; | |
1646 | ||
1647 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1648 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1649 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1650 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1651 | ret = -EINVAL; | |
1652 | goto out; | |
1653 | } | |
1654 | ||
1655 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1656 | if (ret) | |
1657 | goto out; | |
1658 | ||
1659 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1660 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1661 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1662 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1663 | ||
34816ad9 | 1664 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1665 | if (ret) { |
1666 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1667 | cm_free_msg(msg); | |
1668 | return ret; | |
1669 | } | |
1670 | ||
1671 | cm_id->state = IB_CM_REP_SENT; | |
1672 | cm_id_priv->msg = msg; | |
1673 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1674 | cm_id_priv->responder_resources = param->responder_resources; | |
1675 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
ef700446 | 1676 | cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF); |
a977049d HR |
1677 | |
1678 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1679 | return ret; | |
1680 | } | |
1681 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1682 | ||
1683 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1684 | struct cm_id_private *cm_id_priv, | |
1685 | const void *private_data, | |
1686 | u8 private_data_len) | |
1687 | { | |
1688 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1689 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1690 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1691 | ||
1692 | if (private_data && private_data_len) | |
1693 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1694 | } | |
1695 | ||
1696 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1697 | const void *private_data, | |
1698 | u8 private_data_len) | |
1699 | { | |
1700 | struct cm_id_private *cm_id_priv; | |
1701 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1702 | unsigned long flags; |
1703 | void *data; | |
1704 | int ret; | |
1705 | ||
1706 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1707 | return -EINVAL; | |
1708 | ||
1709 | data = cm_copy_private_data(private_data, private_data_len); | |
1710 | if (IS_ERR(data)) | |
1711 | return PTR_ERR(data); | |
1712 | ||
1713 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1714 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1715 | if (cm_id->state != IB_CM_REP_RCVD && | |
1716 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1717 | ret = -EINVAL; | |
1718 | goto error; | |
1719 | } | |
1720 | ||
1721 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1722 | if (ret) | |
1723 | goto error; | |
1724 | ||
1725 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1726 | private_data, private_data_len); | |
1727 | ||
34816ad9 | 1728 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1729 | if (ret) { |
1730 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1731 | cm_free_msg(msg); | |
1732 | kfree(data); | |
1733 | return ret; | |
1734 | } | |
1735 | ||
1736 | cm_id->state = IB_CM_ESTABLISHED; | |
1737 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1738 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1739 | return 0; | |
1740 | ||
1741 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1742 | kfree(data); | |
1743 | return ret; | |
1744 | } | |
1745 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1746 | ||
ef700446 | 1747 | static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type) |
a977049d HR |
1748 | { |
1749 | struct cm_rep_msg *rep_msg; | |
1750 | struct ib_cm_rep_event_param *param; | |
1751 | ||
1752 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1753 | param = &work->cm_event.param.rep_rcvd; | |
1754 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1755 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
ef700446 | 1756 | param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type)); |
a977049d HR |
1757 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); |
1758 | param->responder_resources = rep_msg->initiator_depth; | |
1759 | param->initiator_depth = rep_msg->resp_resources; | |
1760 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1761 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1762 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1763 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1764 | param->srq = cm_rep_get_srq(rep_msg); | |
1765 | work->cm_event.private_data = &rep_msg->private_data; | |
1766 | } | |
1767 | ||
1768 | static void cm_dup_rep_handler(struct cm_work *work) | |
1769 | { | |
1770 | struct cm_id_private *cm_id_priv; | |
1771 | struct cm_rep_msg *rep_msg; | |
1772 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1773 | int ret; |
1774 | ||
1775 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1776 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1777 | rep_msg->local_comm_id); | |
1778 | if (!cm_id_priv) | |
1779 | return; | |
1780 | ||
9af57b7a SH |
1781 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1782 | counter[CM_REP_COUNTER]); | |
a977049d HR |
1783 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
1784 | if (ret) | |
1785 | goto deref; | |
1786 | ||
24be6e81 | 1787 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1788 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
1789 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1790 | cm_id_priv->private_data, | |
1791 | cm_id_priv->private_data_len); | |
1792 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1793 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1794 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1795 | cm_id_priv->private_data, | |
1796 | cm_id_priv->private_data_len); | |
1797 | else | |
1798 | goto unlock; | |
24be6e81 | 1799 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1800 | |
34816ad9 | 1801 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1802 | if (ret) |
1803 | goto free; | |
1804 | goto deref; | |
1805 | ||
24be6e81 | 1806 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1807 | free: cm_free_msg(msg); |
1808 | deref: cm_deref_id(cm_id_priv); | |
1809 | } | |
1810 | ||
1811 | static int cm_rep_handler(struct cm_work *work) | |
1812 | { | |
1813 | struct cm_id_private *cm_id_priv; | |
1814 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1815 | int ret; |
1816 | ||
1817 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1818 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1819 | if (!cm_id_priv) { | |
1820 | cm_dup_rep_handler(work); | |
1821 | return -EINVAL; | |
1822 | } | |
1823 | ||
ef700446 | 1824 | cm_format_rep_event(work, cm_id_priv->qp_type); |
87fd1a11 | 1825 | |
24be6e81 | 1826 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1827 | switch (cm_id_priv->id.state) { |
1828 | case IB_CM_REQ_SENT: | |
1829 | case IB_CM_MRA_REQ_RCVD: | |
1830 | break; | |
1831 | default: | |
24be6e81 | 1832 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1833 | ret = -EINVAL; |
1834 | goto error; | |
1835 | } | |
1836 | ||
a977049d HR |
1837 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1838 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
ef700446 | 1839 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d | 1840 | |
87fd1a11 | 1841 | spin_lock(&cm.lock); |
a977049d HR |
1842 | /* Check for duplicate REP. */ |
1843 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 1844 | spin_unlock(&cm.lock); |
24be6e81 | 1845 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1846 | ret = -EINVAL; |
1847 | goto error; | |
1848 | } | |
1849 | /* Check for a stale connection. */ | |
1850 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1851 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1852 | &cm.remote_id_table); | |
1853 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1854 | spin_unlock(&cm.lock); | |
24be6e81 | 1855 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1856 | cm_issue_rej(work->port, work->mad_recv_wc, |
1857 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1858 | NULL, 0); | |
1859 | ret = -EINVAL; | |
1860 | goto error; | |
1861 | } | |
87fd1a11 | 1862 | spin_unlock(&cm.lock); |
a977049d | 1863 | |
a977049d HR |
1864 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1865 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
ef700446 | 1866 | cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d HR |
1867 | cm_id_priv->initiator_depth = rep_msg->resp_resources; |
1868 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1869 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1870 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1d846126 SH |
1871 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
1872 | cm_id_priv->av.timeout = | |
1873 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1874 | cm_id_priv->av.timeout - 1); | |
1875 | cm_id_priv->alt_av.timeout = | |
1876 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1877 | cm_id_priv->alt_av.timeout - 1); | |
a977049d HR |
1878 | |
1879 | /* todo: handle peer_to_peer */ | |
1880 | ||
34816ad9 | 1881 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1882 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1883 | if (!ret) | |
1884 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1885 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1886 | |
1887 | if (ret) | |
1888 | cm_process_work(cm_id_priv, work); | |
1889 | else | |
1890 | cm_deref_id(cm_id_priv); | |
1891 | return 0; | |
1892 | ||
87fd1a11 | 1893 | error: |
a977049d HR |
1894 | cm_deref_id(cm_id_priv); |
1895 | return ret; | |
1896 | } | |
1897 | ||
1898 | static int cm_establish_handler(struct cm_work *work) | |
1899 | { | |
1900 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1901 | int ret; |
1902 | ||
e1444b5a | 1903 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
1904 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
1905 | if (!cm_id_priv) | |
1906 | return -EINVAL; | |
1907 | ||
24be6e81 | 1908 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1909 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 1910 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1911 | goto out; |
1912 | } | |
1913 | ||
34816ad9 | 1914 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1915 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1916 | if (!ret) | |
1917 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1918 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1919 | |
1920 | if (ret) | |
1921 | cm_process_work(cm_id_priv, work); | |
1922 | else | |
1923 | cm_deref_id(cm_id_priv); | |
1924 | return 0; | |
1925 | out: | |
1926 | cm_deref_id(cm_id_priv); | |
1927 | return -EINVAL; | |
1928 | } | |
1929 | ||
1930 | static int cm_rtu_handler(struct cm_work *work) | |
1931 | { | |
1932 | struct cm_id_private *cm_id_priv; | |
1933 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
1934 | int ret; |
1935 | ||
1936 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1937 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1938 | rtu_msg->local_comm_id); | |
1939 | if (!cm_id_priv) | |
1940 | return -EINVAL; | |
1941 | ||
1942 | work->cm_event.private_data = &rtu_msg->private_data; | |
1943 | ||
24be6e81 | 1944 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1945 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
1946 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 1947 | spin_unlock_irq(&cm_id_priv->lock); |
9af57b7a SH |
1948 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1949 | counter[CM_RTU_COUNTER]); | |
a977049d HR |
1950 | goto out; |
1951 | } | |
1952 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1953 | ||
34816ad9 | 1954 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1955 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1956 | if (!ret) | |
1957 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1958 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1959 | |
1960 | if (ret) | |
1961 | cm_process_work(cm_id_priv, work); | |
1962 | else | |
1963 | cm_deref_id(cm_id_priv); | |
1964 | return 0; | |
1965 | out: | |
1966 | cm_deref_id(cm_id_priv); | |
1967 | return -EINVAL; | |
1968 | } | |
1969 | ||
1970 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1971 | struct cm_id_private *cm_id_priv, | |
1972 | const void *private_data, | |
1973 | u8 private_data_len) | |
1974 | { | |
1975 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1976 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1977 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1978 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1979 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1980 | ||
1981 | if (private_data && private_data_len) | |
1982 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1983 | } | |
1984 | ||
1985 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1986 | const void *private_data, | |
1987 | u8 private_data_len) | |
1988 | { | |
1989 | struct cm_id_private *cm_id_priv; | |
1990 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1991 | unsigned long flags; |
1992 | int ret; | |
1993 | ||
1994 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1995 | return -EINVAL; | |
1996 | ||
1997 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1998 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1999 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
2000 | ret = -EINVAL; | |
2001 | goto out; | |
2002 | } | |
2003 | ||
8d8ac865 SH |
2004 | if (cm_id->lap_state == IB_CM_LAP_SENT || |
2005 | cm_id->lap_state == IB_CM_MRA_LAP_RCVD) | |
2006 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2007 | ||
a977049d HR |
2008 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2009 | if (ret) { | |
2010 | cm_enter_timewait(cm_id_priv); | |
2011 | goto out; | |
2012 | } | |
2013 | ||
2014 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
2015 | private_data, private_data_len); | |
34816ad9 | 2016 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2017 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
2018 | ||
34816ad9 | 2019 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2020 | if (ret) { |
2021 | cm_enter_timewait(cm_id_priv); | |
2022 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2023 | cm_free_msg(msg); | |
2024 | return ret; | |
2025 | } | |
2026 | ||
2027 | cm_id->state = IB_CM_DREQ_SENT; | |
2028 | cm_id_priv->msg = msg; | |
2029 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2030 | return ret; | |
2031 | } | |
2032 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
2033 | ||
2034 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
2035 | struct cm_id_private *cm_id_priv, | |
2036 | const void *private_data, | |
2037 | u8 private_data_len) | |
2038 | { | |
2039 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
2040 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
2041 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2042 | ||
2043 | if (private_data && private_data_len) | |
2044 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
2045 | } | |
2046 | ||
2047 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
2048 | const void *private_data, | |
2049 | u8 private_data_len) | |
2050 | { | |
2051 | struct cm_id_private *cm_id_priv; | |
2052 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2053 | unsigned long flags; |
2054 | void *data; | |
2055 | int ret; | |
2056 | ||
2057 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
2058 | return -EINVAL; | |
2059 | ||
2060 | data = cm_copy_private_data(private_data, private_data_len); | |
2061 | if (IS_ERR(data)) | |
2062 | return PTR_ERR(data); | |
2063 | ||
2064 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2065 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2066 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
2067 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2068 | kfree(data); | |
2069 | return -EINVAL; | |
2070 | } | |
2071 | ||
2072 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2073 | cm_enter_timewait(cm_id_priv); | |
2074 | ||
2075 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2076 | if (ret) | |
2077 | goto out; | |
2078 | ||
2079 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2080 | private_data, private_data_len); | |
2081 | ||
34816ad9 | 2082 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2083 | if (ret) { |
2084 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2085 | cm_free_msg(msg); | |
2086 | return ret; | |
2087 | } | |
2088 | ||
2089 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2090 | return ret; | |
2091 | } | |
2092 | EXPORT_SYMBOL(ib_send_cm_drep); | |
2093 | ||
82a9c16a SH |
2094 | static int cm_issue_drep(struct cm_port *port, |
2095 | struct ib_mad_recv_wc *mad_recv_wc) | |
2096 | { | |
2097 | struct ib_mad_send_buf *msg = NULL; | |
2098 | struct cm_dreq_msg *dreq_msg; | |
2099 | struct cm_drep_msg *drep_msg; | |
2100 | int ret; | |
2101 | ||
2102 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
2103 | if (ret) | |
2104 | return ret; | |
2105 | ||
2106 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
2107 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
2108 | ||
2109 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
2110 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
2111 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
2112 | ||
2113 | ret = ib_post_send_mad(msg, NULL); | |
2114 | if (ret) | |
2115 | cm_free_msg(msg); | |
2116 | ||
2117 | return ret; | |
2118 | } | |
2119 | ||
a977049d HR |
2120 | static int cm_dreq_handler(struct cm_work *work) |
2121 | { | |
2122 | struct cm_id_private *cm_id_priv; | |
2123 | struct cm_dreq_msg *dreq_msg; | |
2124 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2125 | int ret; |
2126 | ||
2127 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
2128 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
2129 | dreq_msg->local_comm_id); | |
82a9c16a | 2130 | if (!cm_id_priv) { |
9af57b7a SH |
2131 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2132 | counter[CM_DREQ_COUNTER]); | |
82a9c16a | 2133 | cm_issue_drep(work->port, work->mad_recv_wc); |
a977049d | 2134 | return -EINVAL; |
82a9c16a | 2135 | } |
a977049d HR |
2136 | |
2137 | work->cm_event.private_data = &dreq_msg->private_data; | |
2138 | ||
24be6e81 | 2139 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2140 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
2141 | goto unlock; | |
2142 | ||
2143 | switch (cm_id_priv->id.state) { | |
2144 | case IB_CM_REP_SENT: | |
2145 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2146 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2147 | break; |
2148 | case IB_CM_ESTABLISHED: | |
8d8ac865 SH |
2149 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || |
2150 | cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2151 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2152 | break; | |
a977049d HR |
2153 | case IB_CM_MRA_REP_RCVD: |
2154 | break; | |
2155 | case IB_CM_TIMEWAIT: | |
9af57b7a SH |
2156 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2157 | counter[CM_DREQ_COUNTER]); | |
a977049d HR |
2158 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2159 | goto unlock; | |
2160 | ||
2161 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2162 | cm_id_priv->private_data, | |
2163 | cm_id_priv->private_data_len); | |
24be6e81 | 2164 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2165 | |
34816ad9 | 2166 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2167 | cm_free_msg(msg); |
2168 | goto deref; | |
9af57b7a SH |
2169 | case IB_CM_DREQ_RCVD: |
2170 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2171 | counter[CM_DREQ_COUNTER]); | |
2172 | goto unlock; | |
a977049d HR |
2173 | default: |
2174 | goto unlock; | |
2175 | } | |
2176 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
2177 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
2178 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2179 | if (!ret) | |
2180 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2181 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2182 | |
2183 | if (ret) | |
2184 | cm_process_work(cm_id_priv, work); | |
2185 | else | |
2186 | cm_deref_id(cm_id_priv); | |
2187 | return 0; | |
2188 | ||
24be6e81 | 2189 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2190 | deref: cm_deref_id(cm_id_priv); |
2191 | return -EINVAL; | |
2192 | } | |
2193 | ||
2194 | static int cm_drep_handler(struct cm_work *work) | |
2195 | { | |
2196 | struct cm_id_private *cm_id_priv; | |
2197 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2198 | int ret; |
2199 | ||
2200 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2201 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2202 | drep_msg->local_comm_id); | |
2203 | if (!cm_id_priv) | |
2204 | return -EINVAL; | |
2205 | ||
2206 | work->cm_event.private_data = &drep_msg->private_data; | |
2207 | ||
24be6e81 | 2208 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2209 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2210 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2211 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2212 | goto out; |
2213 | } | |
2214 | cm_enter_timewait(cm_id_priv); | |
2215 | ||
34816ad9 | 2216 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2217 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2218 | if (!ret) | |
2219 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2220 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2221 | |
2222 | if (ret) | |
2223 | cm_process_work(cm_id_priv, work); | |
2224 | else | |
2225 | cm_deref_id(cm_id_priv); | |
2226 | return 0; | |
2227 | out: | |
2228 | cm_deref_id(cm_id_priv); | |
2229 | return -EINVAL; | |
2230 | } | |
2231 | ||
2232 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2233 | enum ib_cm_rej_reason reason, | |
2234 | void *ari, | |
2235 | u8 ari_length, | |
2236 | const void *private_data, | |
2237 | u8 private_data_len) | |
2238 | { | |
2239 | struct cm_id_private *cm_id_priv; | |
2240 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2241 | unsigned long flags; |
2242 | int ret; | |
2243 | ||
2244 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2245 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2246 | return -EINVAL; | |
2247 | ||
2248 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2249 | ||
2250 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2251 | switch (cm_id->state) { | |
2252 | case IB_CM_REQ_SENT: | |
2253 | case IB_CM_MRA_REQ_RCVD: | |
2254 | case IB_CM_REQ_RCVD: | |
2255 | case IB_CM_MRA_REQ_SENT: | |
2256 | case IB_CM_REP_RCVD: | |
2257 | case IB_CM_MRA_REP_SENT: | |
2258 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2259 | if (!ret) | |
2260 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2261 | cm_id_priv, reason, ari, ari_length, | |
2262 | private_data, private_data_len); | |
2263 | ||
2264 | cm_reset_to_idle(cm_id_priv); | |
2265 | break; | |
2266 | case IB_CM_REP_SENT: | |
2267 | case IB_CM_MRA_REP_RCVD: | |
2268 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2269 | if (!ret) | |
2270 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2271 | cm_id_priv, reason, ari, ari_length, | |
2272 | private_data, private_data_len); | |
2273 | ||
2274 | cm_enter_timewait(cm_id_priv); | |
2275 | break; | |
2276 | default: | |
2277 | ret = -EINVAL; | |
2278 | goto out; | |
2279 | } | |
2280 | ||
2281 | if (ret) | |
2282 | goto out; | |
2283 | ||
34816ad9 | 2284 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2285 | if (ret) |
2286 | cm_free_msg(msg); | |
2287 | ||
2288 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2289 | return ret; | |
2290 | } | |
2291 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2292 | ||
2293 | static void cm_format_rej_event(struct cm_work *work) | |
2294 | { | |
2295 | struct cm_rej_msg *rej_msg; | |
2296 | struct ib_cm_rej_event_param *param; | |
2297 | ||
2298 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2299 | param = &work->cm_event.param.rej_rcvd; | |
2300 | param->ari = rej_msg->ari; | |
2301 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2302 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2303 | work->cm_event.private_data = &rej_msg->private_data; |
2304 | } | |
2305 | ||
2306 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2307 | { | |
2308 | struct cm_timewait_info *timewait_info; | |
2309 | struct cm_id_private *cm_id_priv; | |
97f52eb4 | 2310 | __be32 remote_id; |
a977049d HR |
2311 | |
2312 | remote_id = rej_msg->local_comm_id; | |
2313 | ||
97f52eb4 | 2314 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
24be6e81 | 2315 | spin_lock_irq(&cm.lock); |
97f52eb4 | 2316 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2317 | remote_id); |
2318 | if (!timewait_info) { | |
24be6e81 | 2319 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2320 | return NULL; |
2321 | } | |
f06d2653 SH |
2322 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2323 | (timewait_info->work.local_id ^ | |
2324 | cm.random_id_operand)); | |
a977049d HR |
2325 | if (cm_id_priv) { |
2326 | if (cm_id_priv->id.remote_id == remote_id) | |
2327 | atomic_inc(&cm_id_priv->refcount); | |
2328 | else | |
2329 | cm_id_priv = NULL; | |
2330 | } | |
24be6e81 | 2331 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2332 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
2333 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2334 | else | |
2335 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2336 | ||
2337 | return cm_id_priv; | |
2338 | } | |
2339 | ||
2340 | static int cm_rej_handler(struct cm_work *work) | |
2341 | { | |
2342 | struct cm_id_private *cm_id_priv; | |
2343 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
2344 | int ret; |
2345 | ||
2346 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2347 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2348 | if (!cm_id_priv) | |
2349 | return -EINVAL; | |
2350 | ||
2351 | cm_format_rej_event(work); | |
2352 | ||
24be6e81 | 2353 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2354 | switch (cm_id_priv->id.state) { |
2355 | case IB_CM_REQ_SENT: | |
2356 | case IB_CM_MRA_REQ_RCVD: | |
2357 | case IB_CM_REP_SENT: | |
2358 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2359 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2360 | /* fall through */ |
2361 | case IB_CM_REQ_RCVD: | |
2362 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2363 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2364 | cm_enter_timewait(cm_id_priv); |
2365 | else | |
2366 | cm_reset_to_idle(cm_id_priv); | |
2367 | break; | |
2368 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2369 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2370 | /* fall through */ |
2371 | case IB_CM_REP_RCVD: | |
2372 | case IB_CM_MRA_REP_SENT: | |
a977049d HR |
2373 | cm_enter_timewait(cm_id_priv); |
2374 | break; | |
8d8ac865 SH |
2375 | case IB_CM_ESTABLISHED: |
2376 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT || | |
2377 | cm_id_priv->id.lap_state == IB_CM_LAP_SENT) { | |
2378 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT) | |
2379 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2380 | cm_id_priv->msg); | |
2381 | cm_enter_timewait(cm_id_priv); | |
2382 | break; | |
2383 | } | |
2384 | /* fall through */ | |
a977049d | 2385 | default: |
24be6e81 | 2386 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2387 | ret = -EINVAL; |
2388 | goto out; | |
2389 | } | |
2390 | ||
2391 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2392 | if (!ret) | |
2393 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2394 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2395 | |
2396 | if (ret) | |
2397 | cm_process_work(cm_id_priv, work); | |
2398 | else | |
2399 | cm_deref_id(cm_id_priv); | |
2400 | return 0; | |
2401 | out: | |
2402 | cm_deref_id(cm_id_priv); | |
2403 | return -EINVAL; | |
2404 | } | |
2405 | ||
2406 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2407 | u8 service_timeout, | |
2408 | const void *private_data, | |
2409 | u8 private_data_len) | |
2410 | { | |
2411 | struct cm_id_private *cm_id_priv; | |
2412 | struct ib_mad_send_buf *msg; | |
de98b693 SH |
2413 | enum ib_cm_state cm_state; |
2414 | enum ib_cm_lap_state lap_state; | |
2415 | enum cm_msg_response msg_response; | |
a977049d HR |
2416 | void *data; |
2417 | unsigned long flags; | |
2418 | int ret; | |
2419 | ||
2420 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2421 | return -EINVAL; | |
2422 | ||
2423 | data = cm_copy_private_data(private_data, private_data_len); | |
2424 | if (IS_ERR(data)) | |
2425 | return PTR_ERR(data); | |
2426 | ||
2427 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2428 | ||
2429 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2430 | switch(cm_id_priv->id.state) { | |
2431 | case IB_CM_REQ_RCVD: | |
de98b693 SH |
2432 | cm_state = IB_CM_MRA_REQ_SENT; |
2433 | lap_state = cm_id->lap_state; | |
2434 | msg_response = CM_MSG_RESPONSE_REQ; | |
a977049d HR |
2435 | break; |
2436 | case IB_CM_REP_RCVD: | |
de98b693 SH |
2437 | cm_state = IB_CM_MRA_REP_SENT; |
2438 | lap_state = cm_id->lap_state; | |
2439 | msg_response = CM_MSG_RESPONSE_REP; | |
a977049d HR |
2440 | break; |
2441 | case IB_CM_ESTABLISHED: | |
50a025c6 SH |
2442 | if (cm_id->lap_state == IB_CM_LAP_RCVD) { |
2443 | cm_state = cm_id->state; | |
2444 | lap_state = IB_CM_MRA_LAP_SENT; | |
2445 | msg_response = CM_MSG_RESPONSE_OTHER; | |
2446 | break; | |
2447 | } | |
de98b693 SH |
2448 | default: |
2449 | ret = -EINVAL; | |
2450 | goto error1; | |
2451 | } | |
2452 | ||
2453 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { | |
a977049d HR |
2454 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2455 | if (ret) | |
2456 | goto error1; | |
2457 | ||
2458 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
de98b693 | 2459 | msg_response, service_timeout, |
a977049d | 2460 | private_data, private_data_len); |
34816ad9 | 2461 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2462 | if (ret) |
2463 | goto error2; | |
a977049d | 2464 | } |
de98b693 SH |
2465 | |
2466 | cm_id->state = cm_state; | |
2467 | cm_id->lap_state = lap_state; | |
a977049d HR |
2468 | cm_id_priv->service_timeout = service_timeout; |
2469 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2470 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2471 | return 0; | |
2472 | ||
2473 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2474 | kfree(data); | |
2475 | return ret; | |
2476 | ||
2477 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2478 | kfree(data); | |
2479 | cm_free_msg(msg); | |
2480 | return ret; | |
2481 | } | |
2482 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2483 | ||
2484 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2485 | { | |
2486 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2487 | case CM_MSG_RESPONSE_REQ: | |
2488 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2489 | case CM_MSG_RESPONSE_REP: | |
2490 | case CM_MSG_RESPONSE_OTHER: | |
2491 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2492 | mra_msg->local_comm_id); | |
2493 | default: | |
2494 | return NULL; | |
2495 | } | |
2496 | } | |
2497 | ||
2498 | static int cm_mra_handler(struct cm_work *work) | |
2499 | { | |
2500 | struct cm_id_private *cm_id_priv; | |
2501 | struct cm_mra_msg *mra_msg; | |
a977049d HR |
2502 | int timeout, ret; |
2503 | ||
2504 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2505 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2506 | if (!cm_id_priv) | |
2507 | return -EINVAL; | |
2508 | ||
2509 | work->cm_event.private_data = &mra_msg->private_data; | |
2510 | work->cm_event.param.mra_rcvd.service_timeout = | |
2511 | cm_mra_get_service_timeout(mra_msg); | |
2512 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
1d846126 | 2513 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 2514 | |
24be6e81 | 2515 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2516 | switch (cm_id_priv->id.state) { |
2517 | case IB_CM_REQ_SENT: | |
2518 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2519 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2520 | cm_id_priv->msg, timeout)) |
a977049d HR |
2521 | goto out; |
2522 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2523 | break; | |
2524 | case IB_CM_REP_SENT: | |
2525 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2526 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2527 | cm_id_priv->msg, timeout)) |
a977049d HR |
2528 | goto out; |
2529 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2530 | break; | |
2531 | case IB_CM_ESTABLISHED: | |
2532 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2533 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2534 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
9af57b7a SH |
2535 | cm_id_priv->msg, timeout)) { |
2536 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2537 | atomic_long_inc(&work->port-> | |
2538 | counter_group[CM_RECV_DUPLICATES]. | |
2539 | counter[CM_MRA_COUNTER]); | |
a977049d | 2540 | goto out; |
9af57b7a | 2541 | } |
a977049d HR |
2542 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
2543 | break; | |
9af57b7a SH |
2544 | case IB_CM_MRA_REQ_RCVD: |
2545 | case IB_CM_MRA_REP_RCVD: | |
2546 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2547 | counter[CM_MRA_COUNTER]); | |
2548 | /* fall through */ | |
a977049d HR |
2549 | default: |
2550 | goto out; | |
2551 | } | |
2552 | ||
2553 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2554 | cm_id_priv->id.state; | |
2555 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2556 | if (!ret) | |
2557 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2558 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2559 | |
2560 | if (ret) | |
2561 | cm_process_work(cm_id_priv, work); | |
2562 | else | |
2563 | cm_deref_id(cm_id_priv); | |
2564 | return 0; | |
2565 | out: | |
24be6e81 | 2566 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2567 | cm_deref_id(cm_id_priv); |
2568 | return -EINVAL; | |
2569 | } | |
2570 | ||
2571 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2572 | struct cm_id_private *cm_id_priv, | |
2573 | struct ib_sa_path_rec *alternate_path, | |
2574 | const void *private_data, | |
2575 | u8 private_data_len) | |
2576 | { | |
2577 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2578 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2579 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2580 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2581 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2582 | /* todo: need remote CM response timeout */ | |
2583 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2584 | lap_msg->alt_local_lid = alternate_path->slid; | |
2585 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2586 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2587 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2588 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2589 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2590 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2591 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2592 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2593 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2594 | cm_lap_set_local_ack_timeout(lap_msg, | |
1d846126 SH |
2595 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
2596 | alternate_path->packet_life_time)); | |
a977049d HR |
2597 | |
2598 | if (private_data && private_data_len) | |
2599 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2600 | } | |
2601 | ||
2602 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2603 | struct ib_sa_path_rec *alternate_path, | |
2604 | const void *private_data, | |
2605 | u8 private_data_len) | |
2606 | { | |
2607 | struct cm_id_private *cm_id_priv; | |
2608 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2609 | unsigned long flags; |
2610 | int ret; | |
2611 | ||
2612 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2613 | return -EINVAL; | |
2614 | ||
2615 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2616 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2617 | if (cm_id->state != IB_CM_ESTABLISHED || | |
e1444b5a SH |
2618 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
2619 | cm_id->lap_state != IB_CM_LAP_IDLE)) { | |
a977049d HR |
2620 | ret = -EINVAL; |
2621 | goto out; | |
2622 | } | |
2623 | ||
e1444b5a SH |
2624 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
2625 | if (ret) | |
2626 | goto out; | |
1d846126 SH |
2627 | cm_id_priv->alt_av.timeout = |
2628 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2629 | cm_id_priv->alt_av.timeout - 1); | |
e1444b5a | 2630 | |
a977049d HR |
2631 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2632 | if (ret) | |
2633 | goto out; | |
2634 | ||
2635 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2636 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2637 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2638 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2639 | ||
34816ad9 | 2640 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2641 | if (ret) { |
2642 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2643 | cm_free_msg(msg); | |
2644 | return ret; | |
2645 | } | |
2646 | ||
2647 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2648 | cm_id_priv->msg = msg; | |
2649 | ||
2650 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2651 | return ret; | |
2652 | } | |
2653 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2654 | ||
e1444b5a SH |
2655 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
2656 | struct ib_sa_path_rec *path, | |
a977049d HR |
2657 | struct cm_lap_msg *lap_msg) |
2658 | { | |
2659 | memset(path, 0, sizeof *path); | |
2660 | path->dgid = lap_msg->alt_local_gid; | |
2661 | path->sgid = lap_msg->alt_remote_gid; | |
2662 | path->dlid = lap_msg->alt_local_lid; | |
2663 | path->slid = lap_msg->alt_remote_lid; | |
2664 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2665 | path->hop_limit = lap_msg->alt_hop_limit; | |
2666 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2667 | path->reversible = 1; | |
e1444b5a | 2668 | path->pkey = cm_id_priv->pkey; |
a977049d HR |
2669 | path->sl = cm_lap_get_sl(lap_msg); |
2670 | path->mtu_selector = IB_SA_EQ; | |
e1444b5a | 2671 | path->mtu = cm_id_priv->path_mtu; |
a977049d HR |
2672 | path->rate_selector = IB_SA_EQ; |
2673 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2674 | path->packet_life_time_selector = IB_SA_EQ; | |
2675 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2676 | path->packet_life_time -= (path->packet_life_time > 0); | |
2677 | } | |
2678 | ||
2679 | static int cm_lap_handler(struct cm_work *work) | |
2680 | { | |
2681 | struct cm_id_private *cm_id_priv; | |
2682 | struct cm_lap_msg *lap_msg; | |
2683 | struct ib_cm_lap_event_param *param; | |
2684 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2685 | int ret; |
2686 | ||
2687 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2688 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2689 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2690 | lap_msg->local_comm_id); | |
2691 | if (!cm_id_priv) | |
2692 | return -EINVAL; | |
2693 | ||
2694 | param = &work->cm_event.param.lap_rcvd; | |
2695 | param->alternate_path = &work->path[0]; | |
e1444b5a | 2696 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
a977049d HR |
2697 | work->cm_event.private_data = &lap_msg->private_data; |
2698 | ||
24be6e81 | 2699 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2700 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
2701 | goto unlock; | |
2702 | ||
2703 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 2704 | case IB_CM_LAP_UNINIT: |
a977049d HR |
2705 | case IB_CM_LAP_IDLE: |
2706 | break; | |
2707 | case IB_CM_MRA_LAP_SENT: | |
9af57b7a SH |
2708 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2709 | counter[CM_LAP_COUNTER]); | |
a977049d HR |
2710 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2711 | goto unlock; | |
2712 | ||
2713 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2714 | CM_MSG_RESPONSE_OTHER, | |
2715 | cm_id_priv->service_timeout, | |
2716 | cm_id_priv->private_data, | |
2717 | cm_id_priv->private_data_len); | |
24be6e81 | 2718 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2719 | |
34816ad9 | 2720 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2721 | cm_free_msg(msg); |
2722 | goto deref; | |
9af57b7a SH |
2723 | case IB_CM_LAP_RCVD: |
2724 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2725 | counter[CM_LAP_COUNTER]); | |
2726 | goto unlock; | |
a977049d HR |
2727 | default: |
2728 | goto unlock; | |
2729 | } | |
2730 | ||
2731 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2732 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e1444b5a SH |
2733 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2734 | work->mad_recv_wc->recv_buf.grh, | |
2735 | &cm_id_priv->av); | |
2736 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); | |
a977049d HR |
2737 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2738 | if (!ret) | |
2739 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2740 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2741 | |
2742 | if (ret) | |
2743 | cm_process_work(cm_id_priv, work); | |
2744 | else | |
2745 | cm_deref_id(cm_id_priv); | |
2746 | return 0; | |
2747 | ||
24be6e81 | 2748 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2749 | deref: cm_deref_id(cm_id_priv); |
2750 | return -EINVAL; | |
2751 | } | |
2752 | ||
2753 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2754 | struct cm_id_private *cm_id_priv, | |
2755 | enum ib_cm_apr_status status, | |
2756 | void *info, | |
2757 | u8 info_length, | |
2758 | const void *private_data, | |
2759 | u8 private_data_len) | |
2760 | { | |
2761 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2762 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2763 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2764 | apr_msg->ap_status = (u8) status; | |
2765 | ||
2766 | if (info && info_length) { | |
2767 | apr_msg->info_length = info_length; | |
2768 | memcpy(apr_msg->info, info, info_length); | |
2769 | } | |
2770 | ||
2771 | if (private_data && private_data_len) | |
2772 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2773 | } | |
2774 | ||
2775 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2776 | enum ib_cm_apr_status status, | |
2777 | void *info, | |
2778 | u8 info_length, | |
2779 | const void *private_data, | |
2780 | u8 private_data_len) | |
2781 | { | |
2782 | struct cm_id_private *cm_id_priv; | |
2783 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2784 | unsigned long flags; |
2785 | int ret; | |
2786 | ||
2787 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2788 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2789 | return -EINVAL; | |
2790 | ||
2791 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2792 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2793 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2794 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2795 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2796 | ret = -EINVAL; | |
2797 | goto out; | |
2798 | } | |
2799 | ||
2800 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2801 | if (ret) | |
2802 | goto out; | |
2803 | ||
2804 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2805 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2806 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2807 | if (ret) { |
2808 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2809 | cm_free_msg(msg); | |
2810 | return ret; | |
2811 | } | |
2812 | ||
2813 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2814 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2815 | return ret; | |
2816 | } | |
2817 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2818 | ||
2819 | static int cm_apr_handler(struct cm_work *work) | |
2820 | { | |
2821 | struct cm_id_private *cm_id_priv; | |
2822 | struct cm_apr_msg *apr_msg; | |
a977049d HR |
2823 | int ret; |
2824 | ||
2825 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2826 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2827 | apr_msg->local_comm_id); | |
2828 | if (!cm_id_priv) | |
2829 | return -EINVAL; /* Unmatched reply. */ | |
2830 | ||
2831 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2832 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2833 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2834 | work->cm_event.private_data = &apr_msg->private_data; | |
2835 | ||
24be6e81 | 2836 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2837 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
2838 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2839 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 2840 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2841 | goto out; |
2842 | } | |
2843 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2844 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2845 | cm_id_priv->msg = NULL; |
2846 | ||
2847 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2848 | if (!ret) | |
2849 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2850 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2851 | |
2852 | if (ret) | |
2853 | cm_process_work(cm_id_priv, work); | |
2854 | else | |
2855 | cm_deref_id(cm_id_priv); | |
2856 | return 0; | |
2857 | out: | |
2858 | cm_deref_id(cm_id_priv); | |
2859 | return -EINVAL; | |
2860 | } | |
2861 | ||
2862 | static int cm_timewait_handler(struct cm_work *work) | |
2863 | { | |
2864 | struct cm_timewait_info *timewait_info; | |
2865 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2866 | int ret; |
2867 | ||
2868 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2869 | spin_lock_irq(&cm.lock); |
2870 | list_del(&timewait_info->list); | |
2871 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2872 | |
2873 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2874 | timewait_info->work.remote_id); | |
2875 | if (!cm_id_priv) | |
2876 | return -EINVAL; | |
2877 | ||
8575329d | 2878 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2879 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2880 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2881 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2882 | goto out; |
2883 | } | |
2884 | cm_id_priv->id.state = IB_CM_IDLE; | |
2885 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2886 | if (!ret) | |
2887 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2888 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2889 | |
2890 | if (ret) | |
2891 | cm_process_work(cm_id_priv, work); | |
2892 | else | |
2893 | cm_deref_id(cm_id_priv); | |
2894 | return 0; | |
2895 | out: | |
2896 | cm_deref_id(cm_id_priv); | |
2897 | return -EINVAL; | |
2898 | } | |
2899 | ||
2900 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2901 | struct cm_id_private *cm_id_priv, | |
2902 | struct ib_cm_sidr_req_param *param) | |
2903 | { | |
2904 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2905 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2906 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
a88f4888 | 2907 | sidr_req_msg->pkey = param->path->pkey; |
a977049d HR |
2908 | sidr_req_msg->service_id = param->service_id; |
2909 | ||
2910 | if (param->private_data && param->private_data_len) | |
2911 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2912 | param->private_data_len); | |
2913 | } | |
2914 | ||
2915 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2916 | struct ib_cm_sidr_req_param *param) | |
2917 | { | |
2918 | struct cm_id_private *cm_id_priv; | |
2919 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2920 | unsigned long flags; |
2921 | int ret; | |
2922 | ||
2923 | if (!param->path || (param->private_data && | |
2924 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2925 | return -EINVAL; | |
2926 | ||
2927 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2928 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2929 | if (ret) | |
2930 | goto out; | |
2931 | ||
2932 | cm_id->service_id = param->service_id; | |
9c3da099 | 2933 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
2934 | cm_id_priv->timeout_ms = param->timeout_ms; |
2935 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2936 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2937 | if (ret) | |
2938 | goto out; | |
2939 | ||
2940 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2941 | param); | |
34816ad9 | 2942 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2943 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2944 | ||
2945 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2946 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2947 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2948 | else |
2949 | ret = -EINVAL; | |
2950 | ||
2951 | if (ret) { | |
2952 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2953 | cm_free_msg(msg); | |
2954 | goto out; | |
2955 | } | |
2956 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2957 | cm_id_priv->msg = msg; | |
2958 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2959 | out: | |
2960 | return ret; | |
2961 | } | |
2962 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2963 | ||
2964 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2965 | struct ib_cm_id *listen_id) | |
2966 | { | |
2967 | struct cm_sidr_req_msg *sidr_req_msg; | |
2968 | struct ib_cm_sidr_req_event_param *param; | |
2969 | ||
2970 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2971 | work->mad_recv_wc->recv_buf.mad; | |
2972 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2973 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2974 | param->listen_id = listen_id; |
a977049d HR |
2975 | param->port = work->port->port_num; |
2976 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2977 | } | |
2978 | ||
2979 | static int cm_sidr_req_handler(struct cm_work *work) | |
2980 | { | |
2981 | struct ib_cm_id *cm_id; | |
2982 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2983 | struct cm_sidr_req_msg *sidr_req_msg; | |
2984 | struct ib_wc *wc; | |
a977049d | 2985 | |
d4c4196f | 2986 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
2987 | if (IS_ERR(cm_id)) |
2988 | return PTR_ERR(cm_id); | |
2989 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2990 | ||
2991 | /* Record SGID/SLID and request ID for lookup. */ | |
2992 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2993 | work->mad_recv_wc->recv_buf.mad; | |
2994 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2995 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2996 | cm_id_priv->av.dgid.global.interface_id = 0; |
2997 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 2998 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
2999 | &cm_id_priv->av); |
3000 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
a977049d HR |
3001 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
3002 | atomic_inc(&cm_id_priv->work_count); | |
3003 | ||
24be6e81 | 3004 | spin_lock_irq(&cm.lock); |
a977049d HR |
3005 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
3006 | if (cur_cm_id_priv) { | |
24be6e81 | 3007 | spin_unlock_irq(&cm.lock); |
9af57b7a SH |
3008 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
3009 | counter[CM_SIDR_REQ_COUNTER]); | |
a977049d HR |
3010 | goto out; /* Duplicate message. */ |
3011 | } | |
29c2731c | 3012 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
07d357d0 | 3013 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
3014 | sidr_req_msg->service_id, |
3015 | sidr_req_msg->private_data); | |
a977049d | 3016 | if (!cur_cm_id_priv) { |
24be6e81 | 3017 | spin_unlock_irq(&cm.lock); |
6164c8cd | 3018 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
a977049d HR |
3019 | goto out; /* No match. */ |
3020 | } | |
3021 | atomic_inc(&cur_cm_id_priv->refcount); | |
29963437 | 3022 | atomic_inc(&cm_id_priv->refcount); |
24be6e81 | 3023 | spin_unlock_irq(&cm.lock); |
a977049d HR |
3024 | |
3025 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
3026 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
3027 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
9c3da099 | 3028 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d HR |
3029 | |
3030 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
3031 | cm_process_work(cm_id_priv, work); | |
3032 | cm_deref_id(cur_cm_id_priv); | |
3033 | return 0; | |
3034 | out: | |
3035 | ib_destroy_cm_id(&cm_id_priv->id); | |
3036 | return -EINVAL; | |
3037 | } | |
3038 | ||
3039 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
3040 | struct cm_id_private *cm_id_priv, | |
3041 | struct ib_cm_sidr_rep_param *param) | |
3042 | { | |
3043 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
3044 | cm_id_priv->tid); | |
3045 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
3046 | sidr_rep_msg->status = param->status; | |
3047 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
3048 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
3049 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
3050 | ||
3051 | if (param->info && param->info_length) | |
3052 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
3053 | ||
3054 | if (param->private_data && param->private_data_len) | |
3055 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
3056 | param->private_data_len); | |
3057 | } | |
3058 | ||
3059 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
3060 | struct ib_cm_sidr_rep_param *param) | |
3061 | { | |
3062 | struct cm_id_private *cm_id_priv; | |
3063 | struct ib_mad_send_buf *msg; | |
a977049d HR |
3064 | unsigned long flags; |
3065 | int ret; | |
3066 | ||
3067 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
3068 | (param->private_data && | |
3069 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
3070 | return -EINVAL; | |
3071 | ||
3072 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3073 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3074 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
3075 | ret = -EINVAL; | |
3076 | goto error; | |
3077 | } | |
3078 | ||
3079 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
3080 | if (ret) | |
3081 | goto error; | |
3082 | ||
3083 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
3084 | param); | |
34816ad9 | 3085 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
3086 | if (ret) { |
3087 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3088 | cm_free_msg(msg); | |
3089 | return ret; | |
3090 | } | |
3091 | cm_id->state = IB_CM_IDLE; | |
3092 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3093 | ||
3094 | spin_lock_irqsave(&cm.lock, flags); | |
3095 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
3096 | spin_unlock_irqrestore(&cm.lock, flags); | |
3097 | return 0; | |
3098 | ||
3099 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3100 | return ret; | |
3101 | } | |
3102 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
3103 | ||
3104 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
3105 | { | |
3106 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3107 | struct ib_cm_sidr_rep_event_param *param; | |
3108 | ||
3109 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3110 | work->mad_recv_wc->recv_buf.mad; | |
3111 | param = &work->cm_event.param.sidr_rep_rcvd; | |
3112 | param->status = sidr_rep_msg->status; | |
3113 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
3114 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
3115 | param->info = &sidr_rep_msg->info; | |
3116 | param->info_len = sidr_rep_msg->info_length; | |
3117 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
3118 | } | |
3119 | ||
3120 | static int cm_sidr_rep_handler(struct cm_work *work) | |
3121 | { | |
3122 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3123 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
3124 | |
3125 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3126 | work->mad_recv_wc->recv_buf.mad; | |
3127 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
3128 | if (!cm_id_priv) | |
3129 | return -EINVAL; /* Unmatched reply. */ | |
3130 | ||
24be6e81 | 3131 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 3132 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 3133 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3134 | goto out; |
3135 | } | |
3136 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 3137 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 3138 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3139 | |
3140 | cm_format_sidr_rep_event(work); | |
3141 | cm_process_work(cm_id_priv, work); | |
3142 | return 0; | |
3143 | out: | |
3144 | cm_deref_id(cm_id_priv); | |
3145 | return -EINVAL; | |
3146 | } | |
3147 | ||
3148 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
3149 | enum ib_wc_status wc_status) | |
3150 | { | |
3151 | struct cm_id_private *cm_id_priv; | |
3152 | struct ib_cm_event cm_event; | |
3153 | enum ib_cm_state state; | |
a977049d HR |
3154 | int ret; |
3155 | ||
3156 | memset(&cm_event, 0, sizeof cm_event); | |
3157 | cm_id_priv = msg->context[0]; | |
3158 | ||
3159 | /* Discard old sends or ones without a response. */ | |
24be6e81 | 3160 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3161 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
3162 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
3163 | goto discard; | |
3164 | ||
3165 | switch (state) { | |
3166 | case IB_CM_REQ_SENT: | |
3167 | case IB_CM_MRA_REQ_RCVD: | |
3168 | cm_reset_to_idle(cm_id_priv); | |
3169 | cm_event.event = IB_CM_REQ_ERROR; | |
3170 | break; | |
3171 | case IB_CM_REP_SENT: | |
3172 | case IB_CM_MRA_REP_RCVD: | |
3173 | cm_reset_to_idle(cm_id_priv); | |
3174 | cm_event.event = IB_CM_REP_ERROR; | |
3175 | break; | |
3176 | case IB_CM_DREQ_SENT: | |
3177 | cm_enter_timewait(cm_id_priv); | |
3178 | cm_event.event = IB_CM_DREQ_ERROR; | |
3179 | break; | |
3180 | case IB_CM_SIDR_REQ_SENT: | |
3181 | cm_id_priv->id.state = IB_CM_IDLE; | |
3182 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
3183 | break; | |
3184 | default: | |
3185 | goto discard; | |
3186 | } | |
24be6e81 | 3187 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3188 | cm_event.param.send_status = wc_status; |
3189 | ||
3190 | /* No other events can occur on the cm_id at this point. */ | |
3191 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
3192 | cm_free_msg(msg); | |
3193 | if (ret) | |
3194 | ib_destroy_cm_id(&cm_id_priv->id); | |
3195 | return; | |
3196 | discard: | |
24be6e81 | 3197 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3198 | cm_free_msg(msg); |
3199 | } | |
3200 | ||
3201 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
3202 | struct ib_mad_send_wc *mad_send_wc) | |
3203 | { | |
34816ad9 | 3204 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
9af57b7a SH |
3205 | struct cm_port *port; |
3206 | u16 attr_index; | |
3207 | ||
3208 | port = mad_agent->context; | |
3209 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) | |
3210 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; | |
3211 | ||
3212 | /* | |
3213 | * If the send was in response to a received message (context[0] is not | |
3214 | * set to a cm_id), and is not a REJ, then it is a send that was | |
3215 | * manually retried. | |
3216 | */ | |
3217 | if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) | |
3218 | msg->retries = 1; | |
3219 | ||
3220 | atomic_long_add(1 + msg->retries, | |
3221 | &port->counter_group[CM_XMIT].counter[attr_index]); | |
3222 | if (msg->retries) | |
3223 | atomic_long_add(msg->retries, | |
3224 | &port->counter_group[CM_XMIT_RETRIES]. | |
3225 | counter[attr_index]); | |
a977049d HR |
3226 | |
3227 | switch (mad_send_wc->status) { | |
3228 | case IB_WC_SUCCESS: | |
3229 | case IB_WC_WR_FLUSH_ERR: | |
3230 | cm_free_msg(msg); | |
3231 | break; | |
3232 | default: | |
3233 | if (msg->context[0] && msg->context[1]) | |
3234 | cm_process_send_error(msg, mad_send_wc->status); | |
3235 | else | |
3236 | cm_free_msg(msg); | |
3237 | break; | |
3238 | } | |
3239 | } | |
3240 | ||
c4028958 | 3241 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3242 | { |
c4028958 | 3243 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3244 | int ret; |
3245 | ||
3246 | switch (work->cm_event.event) { | |
3247 | case IB_CM_REQ_RECEIVED: | |
3248 | ret = cm_req_handler(work); | |
3249 | break; | |
3250 | case IB_CM_MRA_RECEIVED: | |
3251 | ret = cm_mra_handler(work); | |
3252 | break; | |
3253 | case IB_CM_REJ_RECEIVED: | |
3254 | ret = cm_rej_handler(work); | |
3255 | break; | |
3256 | case IB_CM_REP_RECEIVED: | |
3257 | ret = cm_rep_handler(work); | |
3258 | break; | |
3259 | case IB_CM_RTU_RECEIVED: | |
3260 | ret = cm_rtu_handler(work); | |
3261 | break; | |
3262 | case IB_CM_USER_ESTABLISHED: | |
3263 | ret = cm_establish_handler(work); | |
3264 | break; | |
3265 | case IB_CM_DREQ_RECEIVED: | |
3266 | ret = cm_dreq_handler(work); | |
3267 | break; | |
3268 | case IB_CM_DREP_RECEIVED: | |
3269 | ret = cm_drep_handler(work); | |
3270 | break; | |
3271 | case IB_CM_SIDR_REQ_RECEIVED: | |
3272 | ret = cm_sidr_req_handler(work); | |
3273 | break; | |
3274 | case IB_CM_SIDR_REP_RECEIVED: | |
3275 | ret = cm_sidr_rep_handler(work); | |
3276 | break; | |
3277 | case IB_CM_LAP_RECEIVED: | |
3278 | ret = cm_lap_handler(work); | |
3279 | break; | |
3280 | case IB_CM_APR_RECEIVED: | |
3281 | ret = cm_apr_handler(work); | |
3282 | break; | |
3283 | case IB_CM_TIMEWAIT_EXIT: | |
3284 | ret = cm_timewait_handler(work); | |
3285 | break; | |
3286 | default: | |
3287 | ret = -EINVAL; | |
3288 | break; | |
3289 | } | |
3290 | if (ret) | |
3291 | cm_free_work(work); | |
3292 | } | |
3293 | ||
e1444b5a | 3294 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3295 | { |
3296 | struct cm_id_private *cm_id_priv; | |
3297 | struct cm_work *work; | |
3298 | unsigned long flags; | |
3299 | int ret = 0; | |
3300 | ||
3301 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3302 | if (!work) | |
3303 | return -ENOMEM; | |
3304 | ||
3305 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3306 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3307 | switch (cm_id->state) | |
3308 | { | |
3309 | case IB_CM_REP_SENT: | |
3310 | case IB_CM_MRA_REP_RCVD: | |
3311 | cm_id->state = IB_CM_ESTABLISHED; | |
3312 | break; | |
3313 | case IB_CM_ESTABLISHED: | |
3314 | ret = -EISCONN; | |
3315 | break; | |
3316 | default: | |
3317 | ret = -EINVAL; | |
3318 | break; | |
3319 | } | |
3320 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3321 | ||
3322 | if (ret) { | |
3323 | kfree(work); | |
3324 | goto out; | |
3325 | } | |
3326 | ||
3327 | /* | |
3328 | * The CM worker thread may try to destroy the cm_id before it | |
3329 | * can execute this work item. To prevent potential deadlock, | |
3330 | * we need to find the cm_id once we're in the context of the | |
3331 | * worker thread, rather than holding a reference on it. | |
3332 | */ | |
c4028958 | 3333 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3334 | work->local_id = cm_id->local_id; |
3335 | work->remote_id = cm_id->remote_id; | |
3336 | work->mad_recv_wc = NULL; | |
3337 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
c4028958 | 3338 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3339 | out: |
3340 | return ret; | |
3341 | } | |
e1444b5a SH |
3342 | |
3343 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3344 | { | |
3345 | struct cm_id_private *cm_id_priv; | |
3346 | unsigned long flags; | |
3347 | int ret = 0; | |
3348 | ||
3349 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3350 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3351 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3352 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3353 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3354 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3355 | cm_id_priv->av = cm_id_priv->alt_av; | |
3356 | } else | |
3357 | ret = -EINVAL; | |
3358 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3359 | ||
3360 | return ret; | |
3361 | } | |
3362 | ||
3363 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3364 | { | |
3365 | int ret; | |
3366 | ||
3367 | switch (event) { | |
3368 | case IB_EVENT_COMM_EST: | |
3369 | ret = cm_establish(cm_id); | |
3370 | break; | |
3371 | case IB_EVENT_PATH_MIG: | |
3372 | ret = cm_migrate(cm_id); | |
3373 | break; | |
3374 | default: | |
3375 | ret = -EINVAL; | |
3376 | } | |
3377 | return ret; | |
3378 | } | |
3379 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3380 | |
3381 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3382 | struct ib_mad_recv_wc *mad_recv_wc) | |
3383 | { | |
9af57b7a | 3384 | struct cm_port *port = mad_agent->context; |
a977049d HR |
3385 | struct cm_work *work; |
3386 | enum ib_cm_event_type event; | |
9af57b7a | 3387 | u16 attr_id; |
a977049d HR |
3388 | int paths = 0; |
3389 | ||
3390 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3391 | case CM_REQ_ATTR_ID: | |
3392 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3393 | alt_local_lid != 0); | |
3394 | event = IB_CM_REQ_RECEIVED; | |
3395 | break; | |
3396 | case CM_MRA_ATTR_ID: | |
3397 | event = IB_CM_MRA_RECEIVED; | |
3398 | break; | |
3399 | case CM_REJ_ATTR_ID: | |
3400 | event = IB_CM_REJ_RECEIVED; | |
3401 | break; | |
3402 | case CM_REP_ATTR_ID: | |
3403 | event = IB_CM_REP_RECEIVED; | |
3404 | break; | |
3405 | case CM_RTU_ATTR_ID: | |
3406 | event = IB_CM_RTU_RECEIVED; | |
3407 | break; | |
3408 | case CM_DREQ_ATTR_ID: | |
3409 | event = IB_CM_DREQ_RECEIVED; | |
3410 | break; | |
3411 | case CM_DREP_ATTR_ID: | |
3412 | event = IB_CM_DREP_RECEIVED; | |
3413 | break; | |
3414 | case CM_SIDR_REQ_ATTR_ID: | |
3415 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3416 | break; | |
3417 | case CM_SIDR_REP_ATTR_ID: | |
3418 | event = IB_CM_SIDR_REP_RECEIVED; | |
3419 | break; | |
3420 | case CM_LAP_ATTR_ID: | |
3421 | paths = 1; | |
3422 | event = IB_CM_LAP_RECEIVED; | |
3423 | break; | |
3424 | case CM_APR_ATTR_ID: | |
3425 | event = IB_CM_APR_RECEIVED; | |
3426 | break; | |
3427 | default: | |
3428 | ib_free_recv_mad(mad_recv_wc); | |
3429 | return; | |
3430 | } | |
3431 | ||
9af57b7a SH |
3432 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
3433 | atomic_long_inc(&port->counter_group[CM_RECV]. | |
3434 | counter[attr_id - CM_ATTR_ID_OFFSET]); | |
3435 | ||
a977049d HR |
3436 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
3437 | GFP_KERNEL); | |
3438 | if (!work) { | |
3439 | ib_free_recv_mad(mad_recv_wc); | |
3440 | return; | |
3441 | } | |
3442 | ||
c4028958 | 3443 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3444 | work->cm_event.event = event; |
3445 | work->mad_recv_wc = mad_recv_wc; | |
9af57b7a | 3446 | work->port = port; |
c4028958 | 3447 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3448 | } |
3449 | ||
3450 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3451 | struct ib_qp_attr *qp_attr, | |
3452 | int *qp_attr_mask) | |
3453 | { | |
3454 | unsigned long flags; | |
3455 | int ret; | |
3456 | ||
3457 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3458 | switch (cm_id_priv->id.state) { | |
3459 | case IB_CM_REQ_SENT: | |
3460 | case IB_CM_MRA_REQ_RCVD: | |
3461 | case IB_CM_REQ_RCVD: | |
3462 | case IB_CM_MRA_REQ_SENT: | |
3463 | case IB_CM_REP_RCVD: | |
3464 | case IB_CM_MRA_REP_SENT: | |
3465 | case IB_CM_REP_SENT: | |
3466 | case IB_CM_MRA_REP_RCVD: | |
3467 | case IB_CM_ESTABLISHED: | |
3468 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3469 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 3470 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 3471 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3472 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3473 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3474 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3475 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3476 | ret = 0; | |
3477 | break; | |
3478 | default: | |
3479 | ret = -EINVAL; | |
3480 | break; | |
3481 | } | |
3482 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3483 | return ret; | |
3484 | } | |
3485 | ||
3486 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3487 | struct ib_qp_attr *qp_attr, | |
3488 | int *qp_attr_mask) | |
3489 | { | |
3490 | unsigned long flags; | |
3491 | int ret; | |
3492 | ||
3493 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3494 | switch (cm_id_priv->id.state) { | |
3495 | case IB_CM_REQ_RCVD: | |
3496 | case IB_CM_MRA_REQ_SENT: | |
3497 | case IB_CM_REP_RCVD: | |
3498 | case IB_CM_MRA_REP_SENT: | |
3499 | case IB_CM_REP_SENT: | |
3500 | case IB_CM_MRA_REP_RCVD: | |
3501 | case IB_CM_ESTABLISHED: | |
3502 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3503 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3504 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3505 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3506 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3507 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
d26a360b SH |
3508 | if (cm_id_priv->qp_type == IB_QPT_RC || |
3509 | cm_id_priv->qp_type == IB_QPT_XRC_TGT) { | |
ae7971a7 SH |
3510 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
3511 | IB_QP_MIN_RNR_TIMER; | |
3512 | qp_attr->max_dest_rd_atomic = | |
3513 | cm_id_priv->responder_resources; | |
3514 | qp_attr->min_rnr_timer = 0; | |
3515 | } | |
a977049d HR |
3516 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3517 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3518 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 3519 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 3520 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
3521 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3522 | } | |
3523 | ret = 0; | |
3524 | break; | |
3525 | default: | |
3526 | ret = -EINVAL; | |
3527 | break; | |
3528 | } | |
3529 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3530 | return ret; | |
3531 | } | |
3532 | ||
3533 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3534 | struct ib_qp_attr *qp_attr, | |
3535 | int *qp_attr_mask) | |
3536 | { | |
3537 | unsigned long flags; | |
3538 | int ret; | |
3539 | ||
3540 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3541 | switch (cm_id_priv->id.state) { | |
0fe313b0 SH |
3542 | /* Allow transition to RTS before sending REP */ |
3543 | case IB_CM_REQ_RCVD: | |
3544 | case IB_CM_MRA_REQ_SENT: | |
3545 | ||
a977049d HR |
3546 | case IB_CM_REP_RCVD: |
3547 | case IB_CM_MRA_REP_SENT: | |
3548 | case IB_CM_REP_SENT: | |
3549 | case IB_CM_MRA_REP_RCVD: | |
3550 | case IB_CM_ESTABLISHED: | |
e1444b5a SH |
3551 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
3552 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
3553 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
d26a360b SH |
3554 | switch (cm_id_priv->qp_type) { |
3555 | case IB_QPT_RC: | |
3556 | case IB_QPT_XRC_INI: | |
3557 | *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY | | |
e1444b5a | 3558 | IB_QP_MAX_QP_RD_ATOMIC; |
e1444b5a SH |
3559 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
3560 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
d26a360b SH |
3561 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; |
3562 | /* fall through */ | |
3563 | case IB_QPT_XRC_TGT: | |
3564 | *qp_attr_mask |= IB_QP_TIMEOUT; | |
3565 | qp_attr->timeout = cm_id_priv->av.timeout; | |
3566 | break; | |
3567 | default: | |
3568 | break; | |
e1444b5a SH |
3569 | } |
3570 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3571 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3572 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3573 | } | |
3574 | } else { | |
3575 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
3576 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; | |
3577 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; | |
1d846126 | 3578 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 3579 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
3580 | qp_attr->path_mig_state = IB_MIG_REARM; |
3581 | } | |
3582 | ret = 0; | |
3583 | break; | |
3584 | default: | |
3585 | ret = -EINVAL; | |
3586 | break; | |
3587 | } | |
3588 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3589 | return ret; | |
3590 | } | |
3591 | ||
3592 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3593 | struct ib_qp_attr *qp_attr, | |
3594 | int *qp_attr_mask) | |
3595 | { | |
3596 | struct cm_id_private *cm_id_priv; | |
3597 | int ret; | |
3598 | ||
3599 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3600 | switch (qp_attr->qp_state) { | |
3601 | case IB_QPS_INIT: | |
3602 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3603 | break; | |
3604 | case IB_QPS_RTR: | |
3605 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3606 | break; | |
3607 | case IB_QPS_RTS: | |
3608 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3609 | break; | |
3610 | default: | |
3611 | ret = -EINVAL; | |
3612 | break; | |
3613 | } | |
3614 | return ret; | |
3615 | } | |
3616 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3617 | ||
454a01e7 | 3618 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
1d846126 SH |
3619 | { |
3620 | struct ib_device_attr attr; | |
3621 | ||
d4c4196f | 3622 | if (ib_query_device(cm_dev->ib_device, &attr)) |
1d846126 SH |
3623 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ |
3624 | else | |
3625 | cm_dev->ack_delay = attr.local_ca_ack_delay; | |
3626 | } | |
3627 | ||
9af57b7a SH |
3628 | static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, |
3629 | char *buf) | |
3630 | { | |
3631 | struct cm_counter_group *group; | |
3632 | struct cm_counter_attribute *cm_attr; | |
3633 | ||
3634 | group = container_of(obj, struct cm_counter_group, obj); | |
3635 | cm_attr = container_of(attr, struct cm_counter_attribute, attr); | |
3636 | ||
3637 | return sprintf(buf, "%ld\n", | |
3638 | atomic_long_read(&group->counter[cm_attr->index])); | |
3639 | } | |
3640 | ||
52cf25d0 | 3641 | static const struct sysfs_ops cm_counter_ops = { |
9af57b7a SH |
3642 | .show = cm_show_counter |
3643 | }; | |
3644 | ||
3645 | static struct kobj_type cm_counter_obj_type = { | |
3646 | .sysfs_ops = &cm_counter_ops, | |
3647 | .default_attrs = cm_counter_default_attrs | |
3648 | }; | |
3649 | ||
3650 | static void cm_release_port_obj(struct kobject *obj) | |
3651 | { | |
3652 | struct cm_port *cm_port; | |
3653 | ||
9af57b7a SH |
3654 | cm_port = container_of(obj, struct cm_port, port_obj); |
3655 | kfree(cm_port); | |
3656 | } | |
3657 | ||
3658 | static struct kobj_type cm_port_obj_type = { | |
3659 | .release = cm_release_port_obj | |
3660 | }; | |
3661 | ||
2c9ede55 | 3662 | static char *cm_devnode(struct device *dev, umode_t *mode) |
c3af0980 | 3663 | { |
b2bc4782 GR |
3664 | if (mode) |
3665 | *mode = 0666; | |
c3af0980 RD |
3666 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
3667 | } | |
3668 | ||
9af57b7a | 3669 | struct class cm_class = { |
c3af0980 | 3670 | .owner = THIS_MODULE, |
9af57b7a | 3671 | .name = "infiniband_cm", |
c3af0980 | 3672 | .devnode = cm_devnode, |
9af57b7a SH |
3673 | }; |
3674 | EXPORT_SYMBOL(cm_class); | |
3675 | ||
9af57b7a SH |
3676 | static int cm_create_port_fs(struct cm_port *port) |
3677 | { | |
3678 | int i, ret; | |
3679 | ||
3680 | ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, | |
110cf374 | 3681 | &port->cm_dev->device->kobj, |
9af57b7a SH |
3682 | "%d", port->port_num); |
3683 | if (ret) { | |
3684 | kfree(port); | |
3685 | return ret; | |
3686 | } | |
3687 | ||
3688 | for (i = 0; i < CM_COUNTER_GROUPS; i++) { | |
3689 | ret = kobject_init_and_add(&port->counter_group[i].obj, | |
3690 | &cm_counter_obj_type, | |
7c7a9bcc | 3691 | &port->port_obj, |
9af57b7a SH |
3692 | "%s", counter_group_names[i]); |
3693 | if (ret) | |
3694 | goto error; | |
3695 | } | |
3696 | ||
3697 | return 0; | |
3698 | ||
3699 | error: | |
3700 | while (i--) | |
7c7a9bcc RD |
3701 | kobject_put(&port->counter_group[i].obj); |
3702 | kobject_put(&port->port_obj); | |
9af57b7a SH |
3703 | return ret; |
3704 | ||
3705 | } | |
3706 | ||
3707 | static void cm_remove_port_fs(struct cm_port *port) | |
3708 | { | |
3709 | int i; | |
3710 | ||
3711 | for (i = 0; i < CM_COUNTER_GROUPS; i++) | |
7c7a9bcc | 3712 | kobject_put(&port->counter_group[i].obj); |
9af57b7a | 3713 | |
7c7a9bcc | 3714 | kobject_put(&port->port_obj); |
9af57b7a SH |
3715 | } |
3716 | ||
d4c4196f | 3717 | static void cm_add_one(struct ib_device *ib_device) |
a977049d HR |
3718 | { |
3719 | struct cm_device *cm_dev; | |
3720 | struct cm_port *port; | |
3721 | struct ib_mad_reg_req reg_req = { | |
3722 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3723 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3724 | }; | |
3725 | struct ib_port_modify port_modify = { | |
3726 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3727 | }; | |
3728 | unsigned long flags; | |
3729 | int ret; | |
3730 | u8 i; | |
3731 | ||
d4c4196f | 3732 | if (rdma_node_get_transport(ib_device->node_type) != RDMA_TRANSPORT_IB) |
07ebafba TT |
3733 | return; |
3734 | ||
9af57b7a | 3735 | cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * |
d4c4196f | 3736 | ib_device->phys_port_cnt, GFP_KERNEL); |
a977049d HR |
3737 | if (!cm_dev) |
3738 | return; | |
3739 | ||
d4c4196f | 3740 | cm_dev->ib_device = ib_device; |
1d846126 | 3741 | cm_get_ack_delay(cm_dev); |
a977049d | 3742 | |
91bd418f GKH |
3743 | cm_dev->device = device_create(&cm_class, &ib_device->dev, |
3744 | MKDEV(0, 0), NULL, | |
3745 | "%s", ib_device->name); | |
3e340c05 | 3746 | if (IS_ERR(cm_dev->device)) { |
9af57b7a SH |
3747 | kfree(cm_dev); |
3748 | return; | |
3749 | } | |
3750 | ||
a977049d | 3751 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
d4c4196f | 3752 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
9af57b7a SH |
3753 | port = kzalloc(sizeof *port, GFP_KERNEL); |
3754 | if (!port) | |
3755 | goto error1; | |
3756 | ||
3757 | cm_dev->port[i-1] = port; | |
a977049d HR |
3758 | port->cm_dev = cm_dev; |
3759 | port->port_num = i; | |
9af57b7a SH |
3760 | |
3761 | ret = cm_create_port_fs(port); | |
3762 | if (ret) | |
3763 | goto error1; | |
3764 | ||
d4c4196f | 3765 | port->mad_agent = ib_register_mad_agent(ib_device, i, |
a977049d HR |
3766 | IB_QPT_GSI, |
3767 | ®_req, | |
3768 | 0, | |
3769 | cm_send_handler, | |
3770 | cm_recv_handler, | |
3771 | port); | |
3772 | if (IS_ERR(port->mad_agent)) | |
9af57b7a | 3773 | goto error2; |
a977049d | 3774 | |
d4c4196f | 3775 | ret = ib_modify_port(ib_device, i, 0, &port_modify); |
a977049d | 3776 | if (ret) |
9af57b7a | 3777 | goto error3; |
a977049d | 3778 | } |
d4c4196f | 3779 | ib_set_client_data(ib_device, &cm_client, cm_dev); |
a977049d HR |
3780 | |
3781 | write_lock_irqsave(&cm.device_lock, flags); | |
3782 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3783 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3784 | return; | |
3785 | ||
9af57b7a | 3786 | error3: |
cf311cd4 | 3787 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a SH |
3788 | error2: |
3789 | cm_remove_port_fs(port); | |
cf311cd4 | 3790 | error1: |
a977049d HR |
3791 | port_modify.set_port_cap_mask = 0; |
3792 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3793 | while (--i) { | |
9af57b7a | 3794 | port = cm_dev->port[i-1]; |
d4c4196f | 3795 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3796 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a | 3797 | cm_remove_port_fs(port); |
a977049d | 3798 | } |
110cf374 | 3799 | device_unregister(cm_dev->device); |
a7e80ce2 | 3800 | kfree(cm_dev); |
a977049d HR |
3801 | } |
3802 | ||
d4c4196f | 3803 | static void cm_remove_one(struct ib_device *ib_device) |
a977049d HR |
3804 | { |
3805 | struct cm_device *cm_dev; | |
3806 | struct cm_port *port; | |
3807 | struct ib_port_modify port_modify = { | |
3808 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3809 | }; | |
3810 | unsigned long flags; | |
3811 | int i; | |
3812 | ||
d4c4196f | 3813 | cm_dev = ib_get_client_data(ib_device, &cm_client); |
a977049d HR |
3814 | if (!cm_dev) |
3815 | return; | |
3816 | ||
3817 | write_lock_irqsave(&cm.device_lock, flags); | |
3818 | list_del(&cm_dev->list); | |
3819 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3820 | ||
d4c4196f | 3821 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
9af57b7a | 3822 | port = cm_dev->port[i-1]; |
d4c4196f | 3823 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3824 | ib_unregister_mad_agent(port->mad_agent); |
84ba284c | 3825 | flush_workqueue(cm.wq); |
9af57b7a | 3826 | cm_remove_port_fs(port); |
a977049d | 3827 | } |
110cf374 | 3828 | device_unregister(cm_dev->device); |
a7e80ce2 | 3829 | kfree(cm_dev); |
a977049d HR |
3830 | } |
3831 | ||
3832 | static int __init ib_cm_init(void) | |
3833 | { | |
3834 | int ret; | |
3835 | ||
3836 | memset(&cm, 0, sizeof cm); | |
3837 | INIT_LIST_HEAD(&cm.device_list); | |
3838 | rwlock_init(&cm.device_lock); | |
3839 | spin_lock_init(&cm.lock); | |
3840 | cm.listen_service_table = RB_ROOT; | |
9c3da099 | 3841 | cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
a977049d HR |
3842 | cm.remote_id_table = RB_ROOT; |
3843 | cm.remote_qp_table = RB_ROOT; | |
3844 | cm.remote_sidr_table = RB_ROOT; | |
3845 | idr_init(&cm.local_id_table); | |
f06d2653 | 3846 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
a977049d | 3847 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
8575329d | 3848 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d | 3849 | |
9af57b7a SH |
3850 | ret = class_register(&cm_class); |
3851 | if (ret) | |
a977049d HR |
3852 | return -ENOMEM; |
3853 | ||
9af57b7a SH |
3854 | cm.wq = create_workqueue("ib_cm"); |
3855 | if (!cm.wq) { | |
3856 | ret = -ENOMEM; | |
3857 | goto error1; | |
3858 | } | |
3859 | ||
a977049d HR |
3860 | ret = ib_register_client(&cm_client); |
3861 | if (ret) | |
9af57b7a | 3862 | goto error2; |
a977049d HR |
3863 | |
3864 | return 0; | |
9af57b7a | 3865 | error2: |
a977049d | 3866 | destroy_workqueue(cm.wq); |
9af57b7a SH |
3867 | error1: |
3868 | class_unregister(&cm_class); | |
a977049d HR |
3869 | return ret; |
3870 | } | |
3871 | ||
3872 | static void __exit ib_cm_cleanup(void) | |
3873 | { | |
8575329d SH |
3874 | struct cm_timewait_info *timewait_info, *tmp; |
3875 | ||
3876 | spin_lock_irq(&cm.lock); | |
3877 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3878 | cancel_delayed_work(&timewait_info->work.work); | |
3879 | spin_unlock_irq(&cm.lock); | |
3880 | ||
84ba284c | 3881 | ib_unregister_client(&cm_client); |
a977049d | 3882 | destroy_workqueue(cm.wq); |
8575329d SH |
3883 | |
3884 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3885 | list_del(&timewait_info->list); | |
3886 | kfree(timewait_info); | |
3887 | } | |
3888 | ||
9af57b7a | 3889 | class_unregister(&cm_class); |
5d7edb3c | 3890 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3891 | } |
3892 | ||
3893 | module_init(ib_cm_init); | |
3894 | module_exit(ib_cm_cleanup); | |
3895 |