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a977049d | 1 | /* |
9af57b7a | 2 | * Copyright (c) 2004-2007 Intel Corporation. All rights reserved. |
a977049d HR |
3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. | |
5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
6 | * | |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
a977049d | 34 | */ |
1b52fa98 SH |
35 | |
36 | #include <linux/completion.h> | |
a977049d | 37 | #include <linux/dma-mapping.h> |
9af57b7a | 38 | #include <linux/device.h> |
a977049d HR |
39 | #include <linux/err.h> |
40 | #include <linux/idr.h> | |
41 | #include <linux/interrupt.h> | |
f06d2653 | 42 | #include <linux/random.h> |
a977049d HR |
43 | #include <linux/rbtree.h> |
44 | #include <linux/spinlock.h> | |
9af57b7a | 45 | #include <linux/sysfs.h> |
a977049d | 46 | #include <linux/workqueue.h> |
110cf374 | 47 | #include <linux/kdev_t.h> |
a977049d | 48 | |
a4d61e84 RD |
49 | #include <rdma/ib_cache.h> |
50 | #include <rdma/ib_cm.h> | |
a977049d HR |
51 | #include "cm_msgs.h" |
52 | ||
53 | MODULE_AUTHOR("Sean Hefty"); | |
54 | MODULE_DESCRIPTION("InfiniBand CM"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
57 | static void cm_add_one(struct ib_device *device); | |
58 | static void cm_remove_one(struct ib_device *device); | |
59 | ||
60 | static struct ib_client cm_client = { | |
61 | .name = "cm", | |
62 | .add = cm_add_one, | |
63 | .remove = cm_remove_one | |
64 | }; | |
65 | ||
66 | static struct ib_cm { | |
67 | spinlock_t lock; | |
68 | struct list_head device_list; | |
69 | rwlock_t device_lock; | |
70 | struct rb_root listen_service_table; | |
71 | u64 listen_service_id; | |
72 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
73 | struct rb_root remote_qp_table; | |
74 | struct rb_root remote_id_table; | |
75 | struct rb_root remote_sidr_table; | |
76 | struct idr local_id_table; | |
f06d2653 | 77 | __be32 random_id_operand; |
8575329d | 78 | struct list_head timewait_list; |
a977049d HR |
79 | struct workqueue_struct *wq; |
80 | } cm; | |
81 | ||
9af57b7a SH |
82 | /* Counter indexes ordered by attribute ID */ |
83 | enum { | |
84 | CM_REQ_COUNTER, | |
85 | CM_MRA_COUNTER, | |
86 | CM_REJ_COUNTER, | |
87 | CM_REP_COUNTER, | |
88 | CM_RTU_COUNTER, | |
89 | CM_DREQ_COUNTER, | |
90 | CM_DREP_COUNTER, | |
91 | CM_SIDR_REQ_COUNTER, | |
92 | CM_SIDR_REP_COUNTER, | |
93 | CM_LAP_COUNTER, | |
94 | CM_APR_COUNTER, | |
95 | CM_ATTR_COUNT, | |
96 | CM_ATTR_ID_OFFSET = 0x0010, | |
97 | }; | |
98 | ||
99 | enum { | |
100 | CM_XMIT, | |
101 | CM_XMIT_RETRIES, | |
102 | CM_RECV, | |
103 | CM_RECV_DUPLICATES, | |
104 | CM_COUNTER_GROUPS | |
105 | }; | |
106 | ||
107 | static char const counter_group_names[CM_COUNTER_GROUPS] | |
108 | [sizeof("cm_rx_duplicates")] = { | |
109 | "cm_tx_msgs", "cm_tx_retries", | |
110 | "cm_rx_msgs", "cm_rx_duplicates" | |
111 | }; | |
112 | ||
113 | struct cm_counter_group { | |
114 | struct kobject obj; | |
115 | atomic_long_t counter[CM_ATTR_COUNT]; | |
116 | }; | |
117 | ||
118 | struct cm_counter_attribute { | |
119 | struct attribute attr; | |
120 | int index; | |
121 | }; | |
122 | ||
123 | #define CM_COUNTER_ATTR(_name, _index) \ | |
124 | struct cm_counter_attribute cm_##_name##_counter_attr = { \ | |
125 | .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \ | |
126 | .index = _index \ | |
127 | } | |
128 | ||
129 | static CM_COUNTER_ATTR(req, CM_REQ_COUNTER); | |
130 | static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER); | |
131 | static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER); | |
132 | static CM_COUNTER_ATTR(rep, CM_REP_COUNTER); | |
133 | static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER); | |
134 | static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER); | |
135 | static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER); | |
136 | static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER); | |
137 | static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER); | |
138 | static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER); | |
139 | static CM_COUNTER_ATTR(apr, CM_APR_COUNTER); | |
140 | ||
141 | static struct attribute *cm_counter_default_attrs[] = { | |
142 | &cm_req_counter_attr.attr, | |
143 | &cm_mra_counter_attr.attr, | |
144 | &cm_rej_counter_attr.attr, | |
145 | &cm_rep_counter_attr.attr, | |
146 | &cm_rtu_counter_attr.attr, | |
147 | &cm_dreq_counter_attr.attr, | |
148 | &cm_drep_counter_attr.attr, | |
149 | &cm_sidr_req_counter_attr.attr, | |
150 | &cm_sidr_rep_counter_attr.attr, | |
151 | &cm_lap_counter_attr.attr, | |
152 | &cm_apr_counter_attr.attr, | |
153 | NULL | |
154 | }; | |
155 | ||
a977049d HR |
156 | struct cm_port { |
157 | struct cm_device *cm_dev; | |
158 | struct ib_mad_agent *mad_agent; | |
9af57b7a | 159 | struct kobject port_obj; |
a977049d | 160 | u8 port_num; |
9af57b7a | 161 | struct cm_counter_group counter_group[CM_COUNTER_GROUPS]; |
a977049d HR |
162 | }; |
163 | ||
164 | struct cm_device { | |
165 | struct list_head list; | |
d4c4196f | 166 | struct ib_device *ib_device; |
110cf374 | 167 | struct device *device; |
1d846126 | 168 | u8 ack_delay; |
9af57b7a | 169 | struct cm_port *port[0]; |
a977049d HR |
170 | }; |
171 | ||
172 | struct cm_av { | |
173 | struct cm_port *port; | |
174 | union ib_gid dgid; | |
175 | struct ib_ah_attr ah_attr; | |
176 | u16 pkey_index; | |
1d846126 | 177 | u8 timeout; |
a977049d HR |
178 | }; |
179 | ||
180 | struct cm_work { | |
c4028958 | 181 | struct delayed_work work; |
a977049d HR |
182 | struct list_head list; |
183 | struct cm_port *port; | |
184 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
185 | __be32 local_id; /* Established / timewait */ |
186 | __be32 remote_id; | |
a977049d HR |
187 | struct ib_cm_event cm_event; |
188 | struct ib_sa_path_rec path[0]; | |
189 | }; | |
190 | ||
191 | struct cm_timewait_info { | |
192 | struct cm_work work; /* Must be first. */ | |
8575329d | 193 | struct list_head list; |
a977049d HR |
194 | struct rb_node remote_qp_node; |
195 | struct rb_node remote_id_node; | |
97f52eb4 SH |
196 | __be64 remote_ca_guid; |
197 | __be32 remote_qpn; | |
a977049d HR |
198 | u8 inserted_remote_qp; |
199 | u8 inserted_remote_id; | |
200 | }; | |
201 | ||
202 | struct cm_id_private { | |
203 | struct ib_cm_id id; | |
204 | ||
205 | struct rb_node service_node; | |
206 | struct rb_node sidr_id_node; | |
87fd1a11 | 207 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 208 | struct completion comp; |
a977049d HR |
209 | atomic_t refcount; |
210 | ||
211 | struct ib_mad_send_buf *msg; | |
212 | struct cm_timewait_info *timewait_info; | |
213 | /* todo: use alternate port on send failure */ | |
214 | struct cm_av av; | |
215 | struct cm_av alt_av; | |
6e61d04f | 216 | struct ib_cm_compare_data *compare_data; |
a977049d HR |
217 | |
218 | void *private_data; | |
97f52eb4 SH |
219 | __be64 tid; |
220 | __be32 local_qpn; | |
221 | __be32 remote_qpn; | |
ae7971a7 | 222 | enum ib_qp_type qp_type; |
97f52eb4 SH |
223 | __be32 sq_psn; |
224 | __be32 rq_psn; | |
a977049d HR |
225 | int timeout_ms; |
226 | enum ib_mtu path_mtu; | |
e1444b5a | 227 | __be16 pkey; |
a977049d HR |
228 | u8 private_data_len; |
229 | u8 max_cm_retries; | |
230 | u8 peer_to_peer; | |
231 | u8 responder_resources; | |
232 | u8 initiator_depth; | |
a977049d HR |
233 | u8 retry_count; |
234 | u8 rnr_retry_count; | |
235 | u8 service_timeout; | |
1d846126 | 236 | u8 target_ack_delay; |
a977049d HR |
237 | |
238 | struct list_head work_list; | |
239 | atomic_t work_count; | |
240 | }; | |
241 | ||
c4028958 | 242 | static void cm_work_handler(struct work_struct *work); |
a977049d HR |
243 | |
244 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
245 | { | |
246 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 247 | complete(&cm_id_priv->comp); |
a977049d HR |
248 | } |
249 | ||
250 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
251 | struct ib_mad_send_buf **msg) | |
252 | { | |
253 | struct ib_mad_agent *mad_agent; | |
254 | struct ib_mad_send_buf *m; | |
255 | struct ib_ah *ah; | |
256 | ||
257 | mad_agent = cm_id_priv->av.port->mad_agent; | |
258 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
259 | if (IS_ERR(ah)) | |
260 | return PTR_ERR(ah); | |
261 | ||
3cd96564 | 262 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
354ba39c | 263 | cm_id_priv->av.pkey_index, |
34816ad9 | 264 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
265 | GFP_ATOMIC); |
266 | if (IS_ERR(m)) { | |
267 | ib_destroy_ah(ah); | |
268 | return PTR_ERR(m); | |
269 | } | |
270 | ||
271 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
272 | m->ah = ah; |
273 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
274 | |
275 | atomic_inc(&cm_id_priv->refcount); | |
276 | m->context[0] = cm_id_priv; | |
277 | *msg = m; | |
278 | return 0; | |
279 | } | |
280 | ||
281 | static int cm_alloc_response_msg(struct cm_port *port, | |
282 | struct ib_mad_recv_wc *mad_recv_wc, | |
283 | struct ib_mad_send_buf **msg) | |
284 | { | |
285 | struct ib_mad_send_buf *m; | |
286 | struct ib_ah *ah; | |
287 | ||
288 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
289 | mad_recv_wc->recv_buf.grh, port->port_num); | |
290 | if (IS_ERR(ah)) | |
291 | return PTR_ERR(ah); | |
292 | ||
293 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 294 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
295 | GFP_ATOMIC); |
296 | if (IS_ERR(m)) { | |
297 | ib_destroy_ah(ah); | |
298 | return PTR_ERR(m); | |
299 | } | |
34816ad9 | 300 | m->ah = ah; |
a977049d HR |
301 | *msg = m; |
302 | return 0; | |
303 | } | |
304 | ||
305 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
306 | { | |
34816ad9 | 307 | ib_destroy_ah(msg->ah); |
a977049d HR |
308 | if (msg->context[0]) |
309 | cm_deref_id(msg->context[0]); | |
310 | ib_free_send_mad(msg); | |
311 | } | |
312 | ||
313 | static void * cm_copy_private_data(const void *private_data, | |
314 | u8 private_data_len) | |
315 | { | |
316 | void *data; | |
317 | ||
318 | if (!private_data || !private_data_len) | |
319 | return NULL; | |
320 | ||
bed8bdfd | 321 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
a977049d HR |
322 | if (!data) |
323 | return ERR_PTR(-ENOMEM); | |
324 | ||
a977049d HR |
325 | return data; |
326 | } | |
327 | ||
328 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
329 | void *private_data, u8 private_data_len) | |
330 | { | |
331 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
332 | kfree(cm_id_priv->private_data); | |
333 | ||
334 | cm_id_priv->private_data = private_data; | |
335 | cm_id_priv->private_data_len = private_data_len; | |
336 | } | |
337 | ||
ca222c6b SH |
338 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
339 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
340 | { |
341 | av->port = port; | |
342 | av->pkey_index = wc->pkey_index; | |
d4c4196f | 343 | ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc, |
ca222c6b | 344 | grh, &av->ah_attr); |
a977049d HR |
345 | } |
346 | ||
347 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
348 | { | |
349 | struct cm_device *cm_dev; | |
350 | struct cm_port *port = NULL; | |
351 | unsigned long flags; | |
352 | int ret; | |
353 | u8 p; | |
354 | ||
355 | read_lock_irqsave(&cm.device_lock, flags); | |
356 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
d4c4196f | 357 | if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid, |
a977049d | 358 | &p, NULL)) { |
9af57b7a | 359 | port = cm_dev->port[p-1]; |
a977049d HR |
360 | break; |
361 | } | |
362 | } | |
363 | read_unlock_irqrestore(&cm.device_lock, flags); | |
364 | ||
365 | if (!port) | |
366 | return -EINVAL; | |
367 | ||
d4c4196f | 368 | ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num, |
a977049d HR |
369 | be16_to_cpu(path->pkey), &av->pkey_index); |
370 | if (ret) | |
371 | return ret; | |
372 | ||
373 | av->port = port; | |
d4c4196f | 374 | ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path, |
ca222c6b | 375 | &av->ah_attr); |
1d846126 | 376 | av->timeout = path->packet_life_time + 1; |
a977049d HR |
377 | return 0; |
378 | } | |
379 | ||
380 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
381 | { | |
382 | unsigned long flags; | |
f06d2653 | 383 | int ret, id; |
de1bb1a6 | 384 | static int next_id; |
a977049d HR |
385 | |
386 | do { | |
387 | spin_lock_irqsave(&cm.lock, flags); | |
f06d2653 | 388 | ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
9f81036c MT |
389 | next_id, &id); |
390 | if (!ret) | |
391 | next_id = ((unsigned) id + 1) & MAX_ID_MASK; | |
a977049d HR |
392 | spin_unlock_irqrestore(&cm.lock, flags); |
393 | } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); | |
f06d2653 | 394 | |
1b90c137 | 395 | cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; |
a977049d HR |
396 | return ret; |
397 | } | |
398 | ||
97f52eb4 | 399 | static void cm_free_id(__be32 local_id) |
a977049d | 400 | { |
24be6e81 | 401 | spin_lock_irq(&cm.lock); |
f06d2653 SH |
402 | idr_remove(&cm.local_id_table, |
403 | (__force int) (local_id ^ cm.random_id_operand)); | |
24be6e81 | 404 | spin_unlock_irq(&cm.lock); |
a977049d HR |
405 | } |
406 | ||
97f52eb4 | 407 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
408 | { |
409 | struct cm_id_private *cm_id_priv; | |
410 | ||
f06d2653 SH |
411 | cm_id_priv = idr_find(&cm.local_id_table, |
412 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
413 | if (cm_id_priv) { |
414 | if (cm_id_priv->id.remote_id == remote_id) | |
415 | atomic_inc(&cm_id_priv->refcount); | |
416 | else | |
417 | cm_id_priv = NULL; | |
418 | } | |
419 | ||
420 | return cm_id_priv; | |
421 | } | |
422 | ||
97f52eb4 | 423 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
424 | { |
425 | struct cm_id_private *cm_id_priv; | |
a977049d | 426 | |
24be6e81 | 427 | spin_lock_irq(&cm.lock); |
a977049d | 428 | cm_id_priv = cm_get_id(local_id, remote_id); |
24be6e81 | 429 | spin_unlock_irq(&cm.lock); |
a977049d HR |
430 | |
431 | return cm_id_priv; | |
432 | } | |
433 | ||
6e61d04f SH |
434 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
435 | { | |
436 | int i; | |
437 | ||
438 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) | |
439 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & | |
440 | ((unsigned long *) mask)[i]; | |
441 | } | |
442 | ||
443 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
444 | struct ib_cm_compare_data *dst_data) | |
445 | { | |
446 | u8 src[IB_CM_COMPARE_SIZE]; | |
447 | u8 dst[IB_CM_COMPARE_SIZE]; | |
448 | ||
449 | if (!src_data || !dst_data) | |
450 | return 0; | |
451 | ||
452 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
453 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
454 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); | |
455 | } | |
456 | ||
457 | static int cm_compare_private_data(u8 *private_data, | |
458 | struct ib_cm_compare_data *dst_data) | |
459 | { | |
460 | u8 src[IB_CM_COMPARE_SIZE]; | |
461 | ||
462 | if (!dst_data) | |
463 | return 0; | |
464 | ||
465 | cm_mask_copy(src, private_data, dst_data->mask); | |
466 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); | |
467 | } | |
468 | ||
a88f4888 RD |
469 | /* |
470 | * Trivial helpers to strip endian annotation and compare; the | |
471 | * endianness doesn't actually matter since we just need a stable | |
472 | * order for the RB tree. | |
473 | */ | |
474 | static int be32_lt(__be32 a, __be32 b) | |
475 | { | |
476 | return (__force u32) a < (__force u32) b; | |
477 | } | |
478 | ||
479 | static int be32_gt(__be32 a, __be32 b) | |
480 | { | |
481 | return (__force u32) a > (__force u32) b; | |
482 | } | |
483 | ||
484 | static int be64_lt(__be64 a, __be64 b) | |
485 | { | |
486 | return (__force u64) a < (__force u64) b; | |
487 | } | |
488 | ||
489 | static int be64_gt(__be64 a, __be64 b) | |
490 | { | |
491 | return (__force u64) a > (__force u64) b; | |
492 | } | |
493 | ||
a977049d HR |
494 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
495 | { | |
496 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
497 | struct rb_node *parent = NULL; | |
498 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
499 | __be64 service_id = cm_id_priv->id.service_id; |
500 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 501 | int data_cmp; |
a977049d HR |
502 | |
503 | while (*link) { | |
504 | parent = *link; | |
505 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
506 | service_node); | |
6e61d04f SH |
507 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
508 | cur_cm_id_priv->compare_data); | |
a977049d | 509 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 510 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
511 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
512 | !data_cmp) | |
07d357d0 SH |
513 | return cur_cm_id_priv; |
514 | ||
515 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
516 | link = &(*link)->rb_left; | |
517 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
518 | link = &(*link)->rb_right; | |
a88f4888 | 519 | else if (be64_lt(service_id, cur_cm_id_priv->id.service_id)) |
a977049d | 520 | link = &(*link)->rb_left; |
a88f4888 | 521 | else if (be64_gt(service_id, cur_cm_id_priv->id.service_id)) |
6e61d04f SH |
522 | link = &(*link)->rb_right; |
523 | else if (data_cmp < 0) | |
524 | link = &(*link)->rb_left; | |
a977049d HR |
525 | else |
526 | link = &(*link)->rb_right; | |
527 | } | |
528 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
529 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
530 | return NULL; | |
531 | } | |
532 | ||
07d357d0 | 533 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f SH |
534 | __be64 service_id, |
535 | u8 *private_data) | |
a977049d HR |
536 | { |
537 | struct rb_node *node = cm.listen_service_table.rb_node; | |
538 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 539 | int data_cmp; |
a977049d HR |
540 | |
541 | while (node) { | |
542 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
543 | data_cmp = cm_compare_private_data(private_data, |
544 | cm_id_priv->compare_data); | |
a977049d | 545 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 546 | cm_id_priv->id.service_id && |
6e61d04f | 547 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 548 | return cm_id_priv; |
07d357d0 SH |
549 | |
550 | if (device < cm_id_priv->id.device) | |
551 | node = node->rb_left; | |
552 | else if (device > cm_id_priv->id.device) | |
553 | node = node->rb_right; | |
a88f4888 | 554 | else if (be64_lt(service_id, cm_id_priv->id.service_id)) |
a977049d | 555 | node = node->rb_left; |
a88f4888 | 556 | else if (be64_gt(service_id, cm_id_priv->id.service_id)) |
6e61d04f SH |
557 | node = node->rb_right; |
558 | else if (data_cmp < 0) | |
559 | node = node->rb_left; | |
a977049d HR |
560 | else |
561 | node = node->rb_right; | |
562 | } | |
563 | return NULL; | |
564 | } | |
565 | ||
566 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
567 | *timewait_info) | |
568 | { | |
569 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
570 | struct rb_node *parent = NULL; | |
571 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
572 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
573 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
574 | |
575 | while (*link) { | |
576 | parent = *link; | |
577 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
578 | remote_id_node); | |
a88f4888 | 579 | if (be32_lt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 580 | link = &(*link)->rb_left; |
a88f4888 | 581 | else if (be32_gt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 582 | link = &(*link)->rb_right; |
a88f4888 | 583 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 584 | link = &(*link)->rb_left; |
a88f4888 | 585 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
586 | link = &(*link)->rb_right; |
587 | else | |
588 | return cur_timewait_info; | |
589 | } | |
590 | timewait_info->inserted_remote_id = 1; | |
591 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
592 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
593 | return NULL; | |
594 | } | |
595 | ||
97f52eb4 SH |
596 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
597 | __be32 remote_id) | |
a977049d HR |
598 | { |
599 | struct rb_node *node = cm.remote_id_table.rb_node; | |
600 | struct cm_timewait_info *timewait_info; | |
601 | ||
602 | while (node) { | |
603 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
604 | remote_id_node); | |
a88f4888 | 605 | if (be32_lt(remote_id, timewait_info->work.remote_id)) |
a977049d | 606 | node = node->rb_left; |
a88f4888 | 607 | else if (be32_gt(remote_id, timewait_info->work.remote_id)) |
a977049d | 608 | node = node->rb_right; |
a88f4888 | 609 | else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d | 610 | node = node->rb_left; |
a88f4888 | 611 | else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d HR |
612 | node = node->rb_right; |
613 | else | |
614 | return timewait_info; | |
615 | } | |
616 | return NULL; | |
617 | } | |
618 | ||
619 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
620 | *timewait_info) | |
621 | { | |
622 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
623 | struct rb_node *parent = NULL; | |
624 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
625 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
626 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
627 | |
628 | while (*link) { | |
629 | parent = *link; | |
630 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
631 | remote_qp_node); | |
a88f4888 | 632 | if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 633 | link = &(*link)->rb_left; |
a88f4888 | 634 | else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 635 | link = &(*link)->rb_right; |
a88f4888 | 636 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 637 | link = &(*link)->rb_left; |
a88f4888 | 638 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
639 | link = &(*link)->rb_right; |
640 | else | |
641 | return cur_timewait_info; | |
642 | } | |
643 | timewait_info->inserted_remote_qp = 1; | |
644 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
645 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
646 | return NULL; | |
647 | } | |
648 | ||
649 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
650 | *cm_id_priv) | |
651 | { | |
652 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
653 | struct rb_node *parent = NULL; | |
654 | struct cm_id_private *cur_cm_id_priv; | |
655 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 656 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
657 | |
658 | while (*link) { | |
659 | parent = *link; | |
660 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
661 | sidr_id_node); | |
a88f4888 | 662 | if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d | 663 | link = &(*link)->rb_left; |
a88f4888 | 664 | else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d HR |
665 | link = &(*link)->rb_right; |
666 | else { | |
667 | int cmp; | |
668 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
669 | sizeof *port_gid); | |
670 | if (cmp < 0) | |
671 | link = &(*link)->rb_left; | |
672 | else if (cmp > 0) | |
673 | link = &(*link)->rb_right; | |
674 | else | |
675 | return cur_cm_id_priv; | |
676 | } | |
677 | } | |
678 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
679 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
680 | return NULL; | |
681 | } | |
682 | ||
683 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
684 | enum ib_cm_sidr_status status) | |
685 | { | |
686 | struct ib_cm_sidr_rep_param param; | |
687 | ||
688 | memset(¶m, 0, sizeof param); | |
689 | param.status = status; | |
690 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
691 | } | |
692 | ||
07d357d0 SH |
693 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
694 | ib_cm_handler cm_handler, | |
a977049d HR |
695 | void *context) |
696 | { | |
697 | struct cm_id_private *cm_id_priv; | |
698 | int ret; | |
699 | ||
de6eb66b | 700 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
701 | if (!cm_id_priv) |
702 | return ERR_PTR(-ENOMEM); | |
703 | ||
a977049d | 704 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 705 | cm_id_priv->id.device = device; |
a977049d HR |
706 | cm_id_priv->id.cm_handler = cm_handler; |
707 | cm_id_priv->id.context = context; | |
354ba39c | 708 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
709 | ret = cm_alloc_id(cm_id_priv); |
710 | if (ret) | |
711 | goto error; | |
712 | ||
713 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 714 | init_completion(&cm_id_priv->comp); |
a977049d HR |
715 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
716 | atomic_set(&cm_id_priv->work_count, -1); | |
717 | atomic_set(&cm_id_priv->refcount, 1); | |
718 | return &cm_id_priv->id; | |
719 | ||
720 | error: | |
721 | kfree(cm_id_priv); | |
722 | return ERR_PTR(-ENOMEM); | |
723 | } | |
724 | EXPORT_SYMBOL(ib_create_cm_id); | |
725 | ||
726 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
727 | { | |
728 | struct cm_work *work; | |
729 | ||
730 | if (list_empty(&cm_id_priv->work_list)) | |
731 | return NULL; | |
732 | ||
733 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
734 | list_del(&work->list); | |
735 | return work; | |
736 | } | |
737 | ||
738 | static void cm_free_work(struct cm_work *work) | |
739 | { | |
740 | if (work->mad_recv_wc) | |
741 | ib_free_recv_mad(work->mad_recv_wc); | |
742 | kfree(work); | |
743 | } | |
744 | ||
745 | static inline int cm_convert_to_ms(int iba_time) | |
746 | { | |
747 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
748 | return 1 << max(iba_time - 8, 0); | |
749 | } | |
750 | ||
1d846126 SH |
751 | /* |
752 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time | |
753 | * Because of how ack_timeout is stored, adding one doubles the timeout. | |
754 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and | |
755 | * increment it (round up) only if the other is within 50%. | |
756 | */ | |
757 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) | |
758 | { | |
759 | int ack_timeout = packet_life_time + 1; | |
760 | ||
761 | if (ack_timeout >= ca_ack_delay) | |
762 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); | |
763 | else | |
764 | ack_timeout = ca_ack_delay + | |
765 | (ack_timeout >= (ca_ack_delay - 1)); | |
766 | ||
767 | return min(31, ack_timeout); | |
768 | } | |
769 | ||
a977049d HR |
770 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
771 | { | |
a977049d HR |
772 | if (timewait_info->inserted_remote_id) { |
773 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
774 | timewait_info->inserted_remote_id = 0; | |
775 | } | |
776 | ||
777 | if (timewait_info->inserted_remote_qp) { | |
778 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
779 | timewait_info->inserted_remote_qp = 0; | |
780 | } | |
a977049d HR |
781 | } |
782 | ||
97f52eb4 | 783 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
784 | { |
785 | struct cm_timewait_info *timewait_info; | |
786 | ||
de6eb66b | 787 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
788 | if (!timewait_info) |
789 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
790 | |
791 | timewait_info->work.local_id = local_id; | |
c4028958 | 792 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
a977049d HR |
793 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
794 | return timewait_info; | |
795 | } | |
796 | ||
797 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
798 | { | |
799 | int wait_time; | |
8575329d | 800 | unsigned long flags; |
a977049d | 801 | |
8575329d | 802 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 803 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
804 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
805 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 806 | |
a977049d HR |
807 | /* |
808 | * The cm_id could be destroyed by the user before we exit timewait. | |
809 | * To protect against this, we search for the cm_id after exiting | |
810 | * timewait before notifying the user that we've exited timewait. | |
811 | */ | |
812 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
1d846126 | 813 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d HR |
814 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
815 | msecs_to_jiffies(wait_time)); | |
816 | cm_id_priv->timewait_info = NULL; | |
817 | } | |
818 | ||
819 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
820 | { | |
8575329d SH |
821 | unsigned long flags; |
822 | ||
a977049d HR |
823 | cm_id_priv->id.state = IB_CM_IDLE; |
824 | if (cm_id_priv->timewait_info) { | |
8575329d | 825 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 826 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 827 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
828 | kfree(cm_id_priv->timewait_info); |
829 | cm_id_priv->timewait_info = NULL; | |
830 | } | |
831 | } | |
832 | ||
04c33543 | 833 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
834 | { |
835 | struct cm_id_private *cm_id_priv; | |
836 | struct cm_work *work; | |
a977049d HR |
837 | |
838 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
839 | retest: | |
24be6e81 | 840 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
841 | switch (cm_id->state) { |
842 | case IB_CM_LISTEN: | |
843 | cm_id->state = IB_CM_IDLE; | |
24be6e81 SH |
844 | spin_unlock_irq(&cm_id_priv->lock); |
845 | spin_lock_irq(&cm.lock); | |
a977049d | 846 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
24be6e81 | 847 | spin_unlock_irq(&cm.lock); |
a977049d HR |
848 | break; |
849 | case IB_CM_SIDR_REQ_SENT: | |
850 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 851 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 852 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
853 | break; |
854 | case IB_CM_SIDR_REQ_RCVD: | |
24be6e81 | 855 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
856 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
857 | break; | |
858 | case IB_CM_REQ_SENT: | |
227eca83 | 859 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 860 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 | 861 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
e971b8cd SH |
862 | &cm_id_priv->id.device->node_guid, |
863 | sizeof cm_id_priv->id.device->node_guid, | |
227eca83 SH |
864 | NULL, 0); |
865 | break; | |
04c33543 MT |
866 | case IB_CM_REQ_RCVD: |
867 | if (err == -ENOMEM) { | |
868 | /* Do not reject to allow future retries. */ | |
869 | cm_reset_to_idle(cm_id_priv); | |
24be6e81 | 870 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 | 871 | } else { |
24be6e81 | 872 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 MT |
873 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
874 | NULL, 0, NULL, 0); | |
875 | } | |
876 | break; | |
a977049d HR |
877 | case IB_CM_MRA_REQ_RCVD: |
878 | case IB_CM_REP_SENT: | |
879 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 880 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 881 | /* Fall through */ |
a977049d HR |
882 | case IB_CM_MRA_REQ_SENT: |
883 | case IB_CM_REP_RCVD: | |
884 | case IB_CM_MRA_REP_SENT: | |
24be6e81 | 885 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 SH |
886 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
887 | NULL, 0, NULL, 0); | |
a977049d HR |
888 | break; |
889 | case IB_CM_ESTABLISHED: | |
24be6e81 | 890 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
891 | ib_send_cm_dreq(cm_id, NULL, 0); |
892 | goto retest; | |
893 | case IB_CM_DREQ_SENT: | |
34816ad9 | 894 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 895 | cm_enter_timewait(cm_id_priv); |
24be6e81 | 896 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
897 | break; |
898 | case IB_CM_DREQ_RCVD: | |
24be6e81 | 899 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
900 | ib_send_cm_drep(cm_id, NULL, 0); |
901 | break; | |
902 | default: | |
24be6e81 | 903 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
904 | break; |
905 | } | |
906 | ||
907 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
908 | cm_deref_id(cm_id_priv); |
909 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
910 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
911 | cm_free_work(work); | |
6e61d04f SH |
912 | kfree(cm_id_priv->compare_data); |
913 | kfree(cm_id_priv->private_data); | |
a977049d HR |
914 | kfree(cm_id_priv); |
915 | } | |
04c33543 MT |
916 | |
917 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
918 | { | |
919 | cm_destroy_id(cm_id, 0); | |
920 | } | |
a977049d HR |
921 | EXPORT_SYMBOL(ib_destroy_cm_id); |
922 | ||
6e61d04f SH |
923 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
924 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
925 | { |
926 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
927 | unsigned long flags; | |
928 | int ret = 0; | |
929 | ||
97f52eb4 SH |
930 | service_mask = service_mask ? service_mask : |
931 | __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
932 | service_id &= service_mask; |
933 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
934 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
935 | return -EINVAL; | |
936 | ||
937 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
938 | if (cm_id->state != IB_CM_IDLE) |
939 | return -EINVAL; | |
940 | ||
941 | if (compare_data) { | |
942 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
943 | GFP_KERNEL); | |
944 | if (!cm_id_priv->compare_data) | |
945 | return -ENOMEM; | |
946 | cm_mask_copy(cm_id_priv->compare_data->data, | |
947 | compare_data->data, compare_data->mask); | |
948 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
949 | IB_CM_COMPARE_SIZE); | |
950 | } | |
a977049d HR |
951 | |
952 | cm_id->state = IB_CM_LISTEN; | |
953 | ||
954 | spin_lock_irqsave(&cm.lock, flags); | |
955 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 SH |
956 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
957 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); | |
a977049d HR |
958 | } else { |
959 | cm_id->service_id = service_id; | |
960 | cm_id->service_mask = service_mask; | |
961 | } | |
962 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
963 | spin_unlock_irqrestore(&cm.lock, flags); | |
964 | ||
965 | if (cur_cm_id_priv) { | |
966 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
967 | kfree(cm_id_priv->compare_data); |
968 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
969 | ret = -EBUSY; |
970 | } | |
971 | return ret; | |
972 | } | |
973 | EXPORT_SYMBOL(ib_cm_listen); | |
974 | ||
97f52eb4 SH |
975 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
976 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
977 | { |
978 | u64 hi_tid, low_tid; | |
979 | ||
980 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
981 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
982 | (msg_seq << 30)); | |
a977049d HR |
983 | return cpu_to_be64(hi_tid | low_tid); |
984 | } | |
985 | ||
986 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 987 | __be16 attr_id, __be64 tid) |
a977049d HR |
988 | { |
989 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
990 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
991 | hdr->class_version = IB_CM_CLASS_VERSION; | |
992 | hdr->method = IB_MGMT_METHOD_SEND; | |
993 | hdr->attr_id = attr_id; | |
994 | hdr->tid = tid; | |
995 | } | |
996 | ||
997 | static void cm_format_req(struct cm_req_msg *req_msg, | |
998 | struct cm_id_private *cm_id_priv, | |
999 | struct ib_cm_req_param *param) | |
1000 | { | |
3971c9f6 SH |
1001 | struct ib_sa_path_rec *pri_path = param->primary_path; |
1002 | struct ib_sa_path_rec *alt_path = param->alternate_path; | |
1003 | ||
a977049d HR |
1004 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
1005 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
1006 | ||
1007 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
1008 | req_msg->service_id = param->service_id; | |
e971b8cd | 1009 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d HR |
1010 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
1011 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
1012 | cm_req_set_init_depth(req_msg, param->initiator_depth); | |
1013 | cm_req_set_remote_resp_timeout(req_msg, | |
1014 | param->remote_cm_response_timeout); | |
1015 | cm_req_set_qp_type(req_msg, param->qp_type); | |
1016 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
1017 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
1018 | cm_req_set_local_resp_timeout(req_msg, | |
1019 | param->local_cm_response_timeout); | |
1020 | cm_req_set_retry_count(req_msg, param->retry_count); | |
1021 | req_msg->pkey = param->primary_path->pkey; | |
1022 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
1023 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
1024 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); | |
1025 | cm_req_set_srq(req_msg, param->srq); | |
1026 | ||
3971c9f6 SH |
1027 | if (pri_path->hop_limit <= 1) { |
1028 | req_msg->primary_local_lid = pri_path->slid; | |
1029 | req_msg->primary_remote_lid = pri_path->dlid; | |
1030 | } else { | |
1031 | /* Work-around until there's a way to obtain remote LID info */ | |
1032 | req_msg->primary_local_lid = IB_LID_PERMISSIVE; | |
1033 | req_msg->primary_remote_lid = IB_LID_PERMISSIVE; | |
1034 | } | |
1035 | req_msg->primary_local_gid = pri_path->sgid; | |
1036 | req_msg->primary_remote_gid = pri_path->dgid; | |
1037 | cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); | |
1038 | cm_req_set_primary_packet_rate(req_msg, pri_path->rate); | |
1039 | req_msg->primary_traffic_class = pri_path->traffic_class; | |
1040 | req_msg->primary_hop_limit = pri_path->hop_limit; | |
1041 | cm_req_set_primary_sl(req_msg, pri_path->sl); | |
1042 | cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); | |
a977049d | 1043 | cm_req_set_primary_local_ack_timeout(req_msg, |
1d846126 | 1044 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1045 | pri_path->packet_life_time)); |
a977049d | 1046 | |
3971c9f6 SH |
1047 | if (alt_path) { |
1048 | if (alt_path->hop_limit <= 1) { | |
1049 | req_msg->alt_local_lid = alt_path->slid; | |
1050 | req_msg->alt_remote_lid = alt_path->dlid; | |
1051 | } else { | |
1052 | req_msg->alt_local_lid = IB_LID_PERMISSIVE; | |
1053 | req_msg->alt_remote_lid = IB_LID_PERMISSIVE; | |
1054 | } | |
1055 | req_msg->alt_local_gid = alt_path->sgid; | |
1056 | req_msg->alt_remote_gid = alt_path->dgid; | |
a977049d | 1057 | cm_req_set_alt_flow_label(req_msg, |
3971c9f6 SH |
1058 | alt_path->flow_label); |
1059 | cm_req_set_alt_packet_rate(req_msg, alt_path->rate); | |
1060 | req_msg->alt_traffic_class = alt_path->traffic_class; | |
1061 | req_msg->alt_hop_limit = alt_path->hop_limit; | |
1062 | cm_req_set_alt_sl(req_msg, alt_path->sl); | |
1063 | cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); | |
a977049d | 1064 | cm_req_set_alt_local_ack_timeout(req_msg, |
1d846126 | 1065 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1066 | alt_path->packet_life_time)); |
a977049d HR |
1067 | } |
1068 | ||
1069 | if (param->private_data && param->private_data_len) | |
1070 | memcpy(req_msg->private_data, param->private_data, | |
1071 | param->private_data_len); | |
1072 | } | |
1073 | ||
858119e1 | 1074 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
1075 | { |
1076 | /* peer-to-peer not supported */ | |
1077 | if (param->peer_to_peer) | |
1078 | return -EINVAL; | |
1079 | ||
1080 | if (!param->primary_path) | |
1081 | return -EINVAL; | |
1082 | ||
1083 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) | |
1084 | return -EINVAL; | |
1085 | ||
1086 | if (param->private_data && | |
1087 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
1088 | return -EINVAL; | |
1089 | ||
1090 | if (param->alternate_path && | |
1091 | (param->alternate_path->pkey != param->primary_path->pkey || | |
1092 | param->alternate_path->mtu != param->primary_path->mtu)) | |
1093 | return -EINVAL; | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
1099 | struct ib_cm_req_param *param) | |
1100 | { | |
1101 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1102 | struct cm_req_msg *req_msg; |
1103 | unsigned long flags; | |
1104 | int ret; | |
1105 | ||
1106 | ret = cm_validate_req_param(param); | |
1107 | if (ret) | |
1108 | return ret; | |
1109 | ||
1110 | /* Verify that we're not in timewait. */ | |
1111 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1112 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1113 | if (cm_id->state != IB_CM_IDLE) { | |
1114 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1115 | ret = -EINVAL; | |
1116 | goto out; | |
1117 | } | |
1118 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1119 | ||
1120 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1121 | id.local_id); | |
75df23e2 SH |
1122 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1123 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 1124 | goto out; |
75df23e2 | 1125 | } |
a977049d HR |
1126 | |
1127 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
1128 | if (ret) | |
1129 | goto error1; | |
1130 | if (param->alternate_path) { | |
1131 | ret = cm_init_av_by_path(param->alternate_path, | |
1132 | &cm_id_priv->alt_av); | |
1133 | if (ret) | |
1134 | goto error1; | |
1135 | } | |
1136 | cm_id->service_id = param->service_id; | |
97f52eb4 | 1137 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
1138 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1139 | param->primary_path->packet_life_time) * 2 + | |
1140 | cm_convert_to_ms( | |
1141 | param->remote_cm_response_timeout); | |
1142 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1143 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1144 | cm_id_priv->responder_resources = param->responder_resources; | |
1145 | cm_id_priv->retry_count = param->retry_count; | |
1146 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1147 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1148 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1149 | |
1150 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1151 | if (ret) | |
1152 | goto error1; | |
1153 | ||
1154 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1155 | cm_format_req(req_msg, cm_id_priv, param); | |
1156 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1157 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1158 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1159 | ||
1160 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1161 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
a977049d HR |
1162 | |
1163 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1164 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1165 | if (ret) { |
1166 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1167 | goto error2; | |
1168 | } | |
1169 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1170 | cm_id->state = IB_CM_REQ_SENT; | |
1171 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1172 | return 0; | |
1173 | ||
1174 | error2: cm_free_msg(cm_id_priv->msg); | |
1175 | error1: kfree(cm_id_priv->timewait_info); | |
1176 | out: return ret; | |
1177 | } | |
1178 | EXPORT_SYMBOL(ib_send_cm_req); | |
1179 | ||
1180 | static int cm_issue_rej(struct cm_port *port, | |
1181 | struct ib_mad_recv_wc *mad_recv_wc, | |
1182 | enum ib_cm_rej_reason reason, | |
1183 | enum cm_msg_response msg_rejected, | |
1184 | void *ari, u8 ari_length) | |
1185 | { | |
1186 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1187 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1188 | int ret; | |
1189 | ||
1190 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1191 | if (ret) | |
1192 | return ret; | |
1193 | ||
1194 | /* We just need common CM header information. Cast to any message. */ | |
1195 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1196 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1197 | ||
1198 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1199 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1200 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1201 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1202 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1203 | |
1204 | if (ari && ari_length) { | |
1205 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1206 | memcpy(rej_msg->ari, ari, ari_length); | |
1207 | } | |
1208 | ||
34816ad9 | 1209 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1210 | if (ret) |
1211 | cm_free_msg(msg); | |
1212 | ||
1213 | return ret; | |
1214 | } | |
1215 | ||
97f52eb4 SH |
1216 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1217 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1218 | { |
1219 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1220 | ((local_ca_guid == remote_ca_guid) && | |
1221 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1222 | } | |
1223 | ||
858119e1 | 1224 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1225 | struct ib_sa_path_rec *primary_path, |
1226 | struct ib_sa_path_rec *alt_path) | |
1227 | { | |
1228 | memset(primary_path, 0, sizeof *primary_path); | |
1229 | primary_path->dgid = req_msg->primary_local_gid; | |
1230 | primary_path->sgid = req_msg->primary_remote_gid; | |
1231 | primary_path->dlid = req_msg->primary_local_lid; | |
1232 | primary_path->slid = req_msg->primary_remote_lid; | |
1233 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1234 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1235 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1236 | primary_path->reversible = 1; | |
1237 | primary_path->pkey = req_msg->pkey; | |
1238 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1239 | primary_path->mtu_selector = IB_SA_EQ; | |
1240 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1241 | primary_path->rate_selector = IB_SA_EQ; | |
1242 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1243 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1244 | primary_path->packet_life_time = | |
1245 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1246 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1247 | ||
1248 | if (req_msg->alt_local_lid) { | |
1249 | memset(alt_path, 0, sizeof *alt_path); | |
1250 | alt_path->dgid = req_msg->alt_local_gid; | |
1251 | alt_path->sgid = req_msg->alt_remote_gid; | |
1252 | alt_path->dlid = req_msg->alt_local_lid; | |
1253 | alt_path->slid = req_msg->alt_remote_lid; | |
1254 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1255 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1256 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1257 | alt_path->reversible = 1; | |
1258 | alt_path->pkey = req_msg->pkey; | |
1259 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1260 | alt_path->mtu_selector = IB_SA_EQ; | |
1261 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1262 | alt_path->rate_selector = IB_SA_EQ; | |
1263 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1264 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1265 | alt_path->packet_life_time = | |
1266 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1267 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | static void cm_format_req_event(struct cm_work *work, | |
1272 | struct cm_id_private *cm_id_priv, | |
1273 | struct ib_cm_id *listen_id) | |
1274 | { | |
1275 | struct cm_req_msg *req_msg; | |
1276 | struct ib_cm_req_event_param *param; | |
1277 | ||
1278 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1279 | param = &work->cm_event.param.req_rcvd; | |
1280 | param->listen_id = listen_id; | |
a977049d HR |
1281 | param->port = cm_id_priv->av.port->port_num; |
1282 | param->primary_path = &work->path[0]; | |
1283 | if (req_msg->alt_local_lid) | |
1284 | param->alternate_path = &work->path[1]; | |
1285 | else | |
1286 | param->alternate_path = NULL; | |
1287 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1288 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1289 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1290 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1291 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1292 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1293 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1294 | param->local_cm_response_timeout = | |
1295 | cm_req_get_remote_resp_timeout(req_msg); | |
1296 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1297 | param->remote_cm_response_timeout = | |
1298 | cm_req_get_local_resp_timeout(req_msg); | |
1299 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1300 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1301 | param->srq = cm_req_get_srq(req_msg); | |
1302 | work->cm_event.private_data = &req_msg->private_data; | |
1303 | } | |
1304 | ||
1305 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1306 | struct cm_work *work) | |
1307 | { | |
a977049d HR |
1308 | int ret; |
1309 | ||
1310 | /* We will typically only have the current event to report. */ | |
1311 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1312 | cm_free_work(work); | |
1313 | ||
1314 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1315 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1316 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1317 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1318 | BUG_ON(!work); |
1319 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1320 | &work->cm_event); | |
1321 | cm_free_work(work); | |
1322 | } | |
1323 | cm_deref_id(cm_id_priv); | |
1324 | if (ret) | |
04c33543 | 1325 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1326 | } |
1327 | ||
1328 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1329 | struct cm_id_private *cm_id_priv, | |
1330 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1331 | const void *private_data, u8 private_data_len) | |
1332 | { | |
1333 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1334 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1335 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1336 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1337 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1338 | ||
1339 | if (private_data && private_data_len) | |
1340 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1341 | } | |
1342 | ||
1343 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1344 | struct cm_id_private *cm_id_priv, | |
1345 | enum ib_cm_rej_reason reason, | |
1346 | void *ari, | |
1347 | u8 ari_length, | |
1348 | const void *private_data, | |
1349 | u8 private_data_len) | |
1350 | { | |
1351 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1352 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1353 | ||
1354 | switch(cm_id_priv->id.state) { | |
1355 | case IB_CM_REQ_RCVD: | |
1356 | rej_msg->local_comm_id = 0; | |
1357 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1358 | break; | |
1359 | case IB_CM_MRA_REQ_SENT: | |
1360 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1361 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1362 | break; | |
1363 | case IB_CM_REP_RCVD: | |
1364 | case IB_CM_MRA_REP_SENT: | |
1365 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1366 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1367 | break; | |
1368 | default: | |
1369 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1370 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1371 | break; | |
1372 | } | |
1373 | ||
97f52eb4 | 1374 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1375 | if (ari && ari_length) { |
1376 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1377 | memcpy(rej_msg->ari, ari, ari_length); | |
1378 | } | |
1379 | ||
1380 | if (private_data && private_data_len) | |
1381 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1382 | } | |
1383 | ||
1384 | static void cm_dup_req_handler(struct cm_work *work, | |
1385 | struct cm_id_private *cm_id_priv) | |
1386 | { | |
1387 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1388 | int ret; |
1389 | ||
9af57b7a SH |
1390 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1391 | counter[CM_REQ_COUNTER]); | |
1392 | ||
a977049d HR |
1393 | /* Quick state check to discard duplicate REQs. */ |
1394 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1395 | return; | |
1396 | ||
1397 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1398 | if (ret) | |
1399 | return; | |
1400 | ||
24be6e81 | 1401 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1402 | switch (cm_id_priv->id.state) { |
1403 | case IB_CM_MRA_REQ_SENT: | |
1404 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1405 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1406 | cm_id_priv->private_data, | |
1407 | cm_id_priv->private_data_len); | |
1408 | break; | |
1409 | case IB_CM_TIMEWAIT: | |
1410 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1411 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1412 | break; | |
1413 | default: | |
1414 | goto unlock; | |
1415 | } | |
24be6e81 | 1416 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1417 | |
34816ad9 | 1418 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1419 | if (ret) |
1420 | goto free; | |
1421 | return; | |
1422 | ||
24be6e81 | 1423 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1424 | free: cm_free_msg(msg); |
1425 | } | |
1426 | ||
1427 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1428 | struct cm_id_private *cm_id_priv) | |
1429 | { | |
1430 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1431 | struct cm_timewait_info *timewait_info; | |
1432 | struct cm_req_msg *req_msg; | |
a977049d HR |
1433 | |
1434 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1435 | ||
d998ccce | 1436 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1437 | spin_lock_irq(&cm.lock); |
a977049d | 1438 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d HR |
1439 | if (timewait_info) { |
1440 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1441 | timewait_info->work.remote_id); | |
24be6e81 | 1442 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1443 | if (cur_cm_id_priv) { |
1444 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1445 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1446 | } |
1447 | return NULL; | |
1448 | } | |
1449 | ||
1450 | /* Check for stale connections. */ | |
1451 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1452 | if (timewait_info) { | |
1453 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
24be6e81 | 1454 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1455 | cm_issue_rej(work->port, work->mad_recv_wc, |
1456 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1457 | NULL, 0); | |
1458 | return NULL; | |
a977049d HR |
1459 | } |
1460 | ||
1461 | /* Find matching listen request. */ | |
07d357d0 | 1462 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1463 | req_msg->service_id, |
1464 | req_msg->private_data); | |
a977049d | 1465 | if (!listen_cm_id_priv) { |
8575329d | 1466 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
24be6e81 | 1467 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1468 | cm_issue_rej(work->port, work->mad_recv_wc, |
1469 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1470 | NULL, 0); | |
8575329d | 1471 | goto out; |
a977049d HR |
1472 | } |
1473 | atomic_inc(&listen_cm_id_priv->refcount); | |
1474 | atomic_inc(&cm_id_priv->refcount); | |
1475 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1476 | atomic_inc(&cm_id_priv->work_count); | |
24be6e81 | 1477 | spin_unlock_irq(&cm.lock); |
8575329d | 1478 | out: |
a977049d | 1479 | return listen_cm_id_priv; |
a977049d HR |
1480 | } |
1481 | ||
3971c9f6 SH |
1482 | /* |
1483 | * Work-around for inter-subnet connections. If the LIDs are permissive, | |
1484 | * we need to override the LID/SL data in the REQ with the LID information | |
1485 | * in the work completion. | |
1486 | */ | |
1487 | static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) | |
1488 | { | |
1489 | if (!cm_req_get_primary_subnet_local(req_msg)) { | |
1490 | if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { | |
1491 | req_msg->primary_local_lid = cpu_to_be16(wc->slid); | |
1492 | cm_req_set_primary_sl(req_msg, wc->sl); | |
1493 | } | |
1494 | ||
1495 | if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) | |
1496 | req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1497 | } | |
1498 | ||
1499 | if (!cm_req_get_alt_subnet_local(req_msg)) { | |
1500 | if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { | |
1501 | req_msg->alt_local_lid = cpu_to_be16(wc->slid); | |
1502 | cm_req_set_alt_sl(req_msg, wc->sl); | |
1503 | } | |
1504 | ||
1505 | if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) | |
1506 | req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1507 | } | |
1508 | } | |
1509 | ||
a977049d HR |
1510 | static int cm_req_handler(struct cm_work *work) |
1511 | { | |
1512 | struct ib_cm_id *cm_id; | |
1513 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1514 | struct cm_req_msg *req_msg; | |
1515 | int ret; | |
1516 | ||
1517 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1518 | ||
d4c4196f | 1519 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
1520 | if (IS_ERR(cm_id)) |
1521 | return PTR_ERR(cm_id); | |
1522 | ||
1523 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1524 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1525 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1526 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1527 | &cm_id_priv->av); |
1528 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1529 | id.local_id); | |
1530 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1531 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1532 | goto destroy; |
a977049d HR |
1533 | } |
1534 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1535 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1536 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1537 | ||
1538 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1539 | if (!listen_cm_id_priv) { | |
1540 | ret = -EINVAL; | |
76842405 SH |
1541 | kfree(cm_id_priv->timewait_info); |
1542 | goto destroy; | |
a977049d HR |
1543 | } |
1544 | ||
1545 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1546 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1547 | cm_id_priv->id.service_id = req_msg->service_id; | |
97f52eb4 | 1548 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d | 1549 | |
3971c9f6 | 1550 | cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
a977049d HR |
1551 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
1552 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); | |
76842405 | 1553 | if (ret) { |
d4c4196f | 1554 | ib_get_cached_gid(work->port->cm_dev->ib_device, |
76842405 SH |
1555 | work->port->port_num, 0, &work->path[0].sgid); |
1556 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1557 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1558 | NULL, 0); | |
1559 | goto rejected; | |
1560 | } | |
a977049d HR |
1561 | if (req_msg->alt_local_lid) { |
1562 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1563 | if (ret) { |
1564 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1565 | &work->path[0].sgid, | |
1566 | sizeof work->path[0].sgid, NULL, 0); | |
1567 | goto rejected; | |
1568 | } | |
a977049d HR |
1569 | } |
1570 | cm_id_priv->tid = req_msg->hdr.tid; | |
1571 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1572 | cm_req_get_local_resp_timeout(req_msg)); | |
1573 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1574 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1575 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1576 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1577 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
e1444b5a | 1578 | cm_id_priv->pkey = req_msg->pkey; |
a977049d | 1579 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
a977049d HR |
1580 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
1581 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1582 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1583 | |
1584 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1585 | cm_process_work(cm_id_priv, work); | |
1586 | cm_deref_id(listen_cm_id_priv); | |
1587 | return 0; | |
1588 | ||
76842405 SH |
1589 | rejected: |
1590 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1591 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1592 | destroy: |
1593 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1594 | return ret; |
1595 | } | |
1596 | ||
1597 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1598 | struct cm_id_private *cm_id_priv, | |
1599 | struct ib_cm_rep_param *param) | |
1600 | { | |
1601 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1602 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1603 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1604 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); | |
1605 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); | |
1606 | rep_msg->resp_resources = param->responder_resources; | |
1607 | rep_msg->initiator_depth = param->initiator_depth; | |
1d846126 SH |
1608 | cm_rep_set_target_ack_delay(rep_msg, |
1609 | cm_id_priv->av.port->cm_dev->ack_delay); | |
a977049d HR |
1610 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
1611 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1612 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); | |
1613 | cm_rep_set_srq(rep_msg, param->srq); | |
e971b8cd | 1614 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d HR |
1615 | |
1616 | if (param->private_data && param->private_data_len) | |
1617 | memcpy(rep_msg->private_data, param->private_data, | |
1618 | param->private_data_len); | |
1619 | } | |
1620 | ||
1621 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1622 | struct ib_cm_rep_param *param) | |
1623 | { | |
1624 | struct cm_id_private *cm_id_priv; | |
1625 | struct ib_mad_send_buf *msg; | |
1626 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1627 | unsigned long flags; |
1628 | int ret; | |
1629 | ||
1630 | if (param->private_data && | |
1631 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1632 | return -EINVAL; | |
1633 | ||
1634 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1635 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1636 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1637 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1638 | ret = -EINVAL; | |
1639 | goto out; | |
1640 | } | |
1641 | ||
1642 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1643 | if (ret) | |
1644 | goto out; | |
1645 | ||
1646 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1647 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1648 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1649 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1650 | ||
34816ad9 | 1651 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1652 | if (ret) { |
1653 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1654 | cm_free_msg(msg); | |
1655 | return ret; | |
1656 | } | |
1657 | ||
1658 | cm_id->state = IB_CM_REP_SENT; | |
1659 | cm_id_priv->msg = msg; | |
1660 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1661 | cm_id_priv->responder_resources = param->responder_resources; | |
1662 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
1663 | cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); | |
1664 | ||
1665 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1666 | return ret; | |
1667 | } | |
1668 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1669 | ||
1670 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1671 | struct cm_id_private *cm_id_priv, | |
1672 | const void *private_data, | |
1673 | u8 private_data_len) | |
1674 | { | |
1675 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1676 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1677 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1678 | ||
1679 | if (private_data && private_data_len) | |
1680 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1681 | } | |
1682 | ||
1683 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1684 | const void *private_data, | |
1685 | u8 private_data_len) | |
1686 | { | |
1687 | struct cm_id_private *cm_id_priv; | |
1688 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1689 | unsigned long flags; |
1690 | void *data; | |
1691 | int ret; | |
1692 | ||
1693 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1694 | return -EINVAL; | |
1695 | ||
1696 | data = cm_copy_private_data(private_data, private_data_len); | |
1697 | if (IS_ERR(data)) | |
1698 | return PTR_ERR(data); | |
1699 | ||
1700 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1701 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1702 | if (cm_id->state != IB_CM_REP_RCVD && | |
1703 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1704 | ret = -EINVAL; | |
1705 | goto error; | |
1706 | } | |
1707 | ||
1708 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1709 | if (ret) | |
1710 | goto error; | |
1711 | ||
1712 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1713 | private_data, private_data_len); | |
1714 | ||
34816ad9 | 1715 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1716 | if (ret) { |
1717 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1718 | cm_free_msg(msg); | |
1719 | kfree(data); | |
1720 | return ret; | |
1721 | } | |
1722 | ||
1723 | cm_id->state = IB_CM_ESTABLISHED; | |
1724 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1725 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1726 | return 0; | |
1727 | ||
1728 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1729 | kfree(data); | |
1730 | return ret; | |
1731 | } | |
1732 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1733 | ||
1734 | static void cm_format_rep_event(struct cm_work *work) | |
1735 | { | |
1736 | struct cm_rep_msg *rep_msg; | |
1737 | struct ib_cm_rep_event_param *param; | |
1738 | ||
1739 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1740 | param = &work->cm_event.param.rep_rcvd; | |
1741 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1742 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
1743 | param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); | |
1744 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); | |
1745 | param->responder_resources = rep_msg->initiator_depth; | |
1746 | param->initiator_depth = rep_msg->resp_resources; | |
1747 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1748 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1749 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1750 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1751 | param->srq = cm_rep_get_srq(rep_msg); | |
1752 | work->cm_event.private_data = &rep_msg->private_data; | |
1753 | } | |
1754 | ||
1755 | static void cm_dup_rep_handler(struct cm_work *work) | |
1756 | { | |
1757 | struct cm_id_private *cm_id_priv; | |
1758 | struct cm_rep_msg *rep_msg; | |
1759 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1760 | int ret; |
1761 | ||
1762 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1763 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1764 | rep_msg->local_comm_id); | |
1765 | if (!cm_id_priv) | |
1766 | return; | |
1767 | ||
9af57b7a SH |
1768 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1769 | counter[CM_REP_COUNTER]); | |
a977049d HR |
1770 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
1771 | if (ret) | |
1772 | goto deref; | |
1773 | ||
24be6e81 | 1774 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1775 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
1776 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1777 | cm_id_priv->private_data, | |
1778 | cm_id_priv->private_data_len); | |
1779 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1780 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1781 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1782 | cm_id_priv->private_data, | |
1783 | cm_id_priv->private_data_len); | |
1784 | else | |
1785 | goto unlock; | |
24be6e81 | 1786 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1787 | |
34816ad9 | 1788 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1789 | if (ret) |
1790 | goto free; | |
1791 | goto deref; | |
1792 | ||
24be6e81 | 1793 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1794 | free: cm_free_msg(msg); |
1795 | deref: cm_deref_id(cm_id_priv); | |
1796 | } | |
1797 | ||
1798 | static int cm_rep_handler(struct cm_work *work) | |
1799 | { | |
1800 | struct cm_id_private *cm_id_priv; | |
1801 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1802 | int ret; |
1803 | ||
1804 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1805 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1806 | if (!cm_id_priv) { | |
1807 | cm_dup_rep_handler(work); | |
1808 | return -EINVAL; | |
1809 | } | |
1810 | ||
87fd1a11 SH |
1811 | cm_format_rep_event(work); |
1812 | ||
24be6e81 | 1813 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1814 | switch (cm_id_priv->id.state) { |
1815 | case IB_CM_REQ_SENT: | |
1816 | case IB_CM_MRA_REQ_RCVD: | |
1817 | break; | |
1818 | default: | |
24be6e81 | 1819 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1820 | ret = -EINVAL; |
1821 | goto error; | |
1822 | } | |
1823 | ||
a977049d HR |
1824 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1825 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
1826 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1827 | ||
87fd1a11 | 1828 | spin_lock(&cm.lock); |
a977049d HR |
1829 | /* Check for duplicate REP. */ |
1830 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 1831 | spin_unlock(&cm.lock); |
24be6e81 | 1832 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1833 | ret = -EINVAL; |
1834 | goto error; | |
1835 | } | |
1836 | /* Check for a stale connection. */ | |
1837 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1838 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1839 | &cm.remote_id_table); | |
1840 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1841 | spin_unlock(&cm.lock); | |
24be6e81 | 1842 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1843 | cm_issue_rej(work->port, work->mad_recv_wc, |
1844 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1845 | NULL, 0); | |
1846 | ret = -EINVAL; | |
1847 | goto error; | |
1848 | } | |
87fd1a11 | 1849 | spin_unlock(&cm.lock); |
a977049d | 1850 | |
a977049d HR |
1851 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1852 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
1853 | cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); | |
1854 | cm_id_priv->initiator_depth = rep_msg->resp_resources; | |
1855 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1856 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1857 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1d846126 SH |
1858 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
1859 | cm_id_priv->av.timeout = | |
1860 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1861 | cm_id_priv->av.timeout - 1); | |
1862 | cm_id_priv->alt_av.timeout = | |
1863 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1864 | cm_id_priv->alt_av.timeout - 1); | |
a977049d HR |
1865 | |
1866 | /* todo: handle peer_to_peer */ | |
1867 | ||
34816ad9 | 1868 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1869 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1870 | if (!ret) | |
1871 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1872 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1873 | |
1874 | if (ret) | |
1875 | cm_process_work(cm_id_priv, work); | |
1876 | else | |
1877 | cm_deref_id(cm_id_priv); | |
1878 | return 0; | |
1879 | ||
87fd1a11 | 1880 | error: |
a977049d HR |
1881 | cm_deref_id(cm_id_priv); |
1882 | return ret; | |
1883 | } | |
1884 | ||
1885 | static int cm_establish_handler(struct cm_work *work) | |
1886 | { | |
1887 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1888 | int ret; |
1889 | ||
e1444b5a | 1890 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
1891 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
1892 | if (!cm_id_priv) | |
1893 | return -EINVAL; | |
1894 | ||
24be6e81 | 1895 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1896 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 1897 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1898 | goto out; |
1899 | } | |
1900 | ||
34816ad9 | 1901 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1902 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1903 | if (!ret) | |
1904 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1905 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1906 | |
1907 | if (ret) | |
1908 | cm_process_work(cm_id_priv, work); | |
1909 | else | |
1910 | cm_deref_id(cm_id_priv); | |
1911 | return 0; | |
1912 | out: | |
1913 | cm_deref_id(cm_id_priv); | |
1914 | return -EINVAL; | |
1915 | } | |
1916 | ||
1917 | static int cm_rtu_handler(struct cm_work *work) | |
1918 | { | |
1919 | struct cm_id_private *cm_id_priv; | |
1920 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
1921 | int ret; |
1922 | ||
1923 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1924 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1925 | rtu_msg->local_comm_id); | |
1926 | if (!cm_id_priv) | |
1927 | return -EINVAL; | |
1928 | ||
1929 | work->cm_event.private_data = &rtu_msg->private_data; | |
1930 | ||
24be6e81 | 1931 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1932 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
1933 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 1934 | spin_unlock_irq(&cm_id_priv->lock); |
9af57b7a SH |
1935 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1936 | counter[CM_RTU_COUNTER]); | |
a977049d HR |
1937 | goto out; |
1938 | } | |
1939 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1940 | ||
34816ad9 | 1941 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1942 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1943 | if (!ret) | |
1944 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1945 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1946 | |
1947 | if (ret) | |
1948 | cm_process_work(cm_id_priv, work); | |
1949 | else | |
1950 | cm_deref_id(cm_id_priv); | |
1951 | return 0; | |
1952 | out: | |
1953 | cm_deref_id(cm_id_priv); | |
1954 | return -EINVAL; | |
1955 | } | |
1956 | ||
1957 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1958 | struct cm_id_private *cm_id_priv, | |
1959 | const void *private_data, | |
1960 | u8 private_data_len) | |
1961 | { | |
1962 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1963 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1964 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1965 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1966 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1967 | ||
1968 | if (private_data && private_data_len) | |
1969 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1970 | } | |
1971 | ||
1972 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1973 | const void *private_data, | |
1974 | u8 private_data_len) | |
1975 | { | |
1976 | struct cm_id_private *cm_id_priv; | |
1977 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1978 | unsigned long flags; |
1979 | int ret; | |
1980 | ||
1981 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
1982 | return -EINVAL; | |
1983 | ||
1984 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1985 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1986 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
1987 | ret = -EINVAL; | |
1988 | goto out; | |
1989 | } | |
1990 | ||
1991 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1992 | if (ret) { | |
1993 | cm_enter_timewait(cm_id_priv); | |
1994 | goto out; | |
1995 | } | |
1996 | ||
1997 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
1998 | private_data, private_data_len); | |
34816ad9 | 1999 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2000 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
2001 | ||
34816ad9 | 2002 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2003 | if (ret) { |
2004 | cm_enter_timewait(cm_id_priv); | |
2005 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2006 | cm_free_msg(msg); | |
2007 | return ret; | |
2008 | } | |
2009 | ||
2010 | cm_id->state = IB_CM_DREQ_SENT; | |
2011 | cm_id_priv->msg = msg; | |
2012 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2013 | return ret; | |
2014 | } | |
2015 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
2016 | ||
2017 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
2018 | struct cm_id_private *cm_id_priv, | |
2019 | const void *private_data, | |
2020 | u8 private_data_len) | |
2021 | { | |
2022 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
2023 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
2024 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2025 | ||
2026 | if (private_data && private_data_len) | |
2027 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
2028 | } | |
2029 | ||
2030 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
2031 | const void *private_data, | |
2032 | u8 private_data_len) | |
2033 | { | |
2034 | struct cm_id_private *cm_id_priv; | |
2035 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2036 | unsigned long flags; |
2037 | void *data; | |
2038 | int ret; | |
2039 | ||
2040 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
2041 | return -EINVAL; | |
2042 | ||
2043 | data = cm_copy_private_data(private_data, private_data_len); | |
2044 | if (IS_ERR(data)) | |
2045 | return PTR_ERR(data); | |
2046 | ||
2047 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2048 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2049 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
2050 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2051 | kfree(data); | |
2052 | return -EINVAL; | |
2053 | } | |
2054 | ||
2055 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2056 | cm_enter_timewait(cm_id_priv); | |
2057 | ||
2058 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2059 | if (ret) | |
2060 | goto out; | |
2061 | ||
2062 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2063 | private_data, private_data_len); | |
2064 | ||
34816ad9 | 2065 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2066 | if (ret) { |
2067 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2068 | cm_free_msg(msg); | |
2069 | return ret; | |
2070 | } | |
2071 | ||
2072 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2073 | return ret; | |
2074 | } | |
2075 | EXPORT_SYMBOL(ib_send_cm_drep); | |
2076 | ||
82a9c16a SH |
2077 | static int cm_issue_drep(struct cm_port *port, |
2078 | struct ib_mad_recv_wc *mad_recv_wc) | |
2079 | { | |
2080 | struct ib_mad_send_buf *msg = NULL; | |
2081 | struct cm_dreq_msg *dreq_msg; | |
2082 | struct cm_drep_msg *drep_msg; | |
2083 | int ret; | |
2084 | ||
2085 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
2086 | if (ret) | |
2087 | return ret; | |
2088 | ||
2089 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
2090 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
2091 | ||
2092 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
2093 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
2094 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
2095 | ||
2096 | ret = ib_post_send_mad(msg, NULL); | |
2097 | if (ret) | |
2098 | cm_free_msg(msg); | |
2099 | ||
2100 | return ret; | |
2101 | } | |
2102 | ||
a977049d HR |
2103 | static int cm_dreq_handler(struct cm_work *work) |
2104 | { | |
2105 | struct cm_id_private *cm_id_priv; | |
2106 | struct cm_dreq_msg *dreq_msg; | |
2107 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2108 | int ret; |
2109 | ||
2110 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
2111 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
2112 | dreq_msg->local_comm_id); | |
82a9c16a | 2113 | if (!cm_id_priv) { |
9af57b7a SH |
2114 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2115 | counter[CM_DREQ_COUNTER]); | |
82a9c16a | 2116 | cm_issue_drep(work->port, work->mad_recv_wc); |
a977049d | 2117 | return -EINVAL; |
82a9c16a | 2118 | } |
a977049d HR |
2119 | |
2120 | work->cm_event.private_data = &dreq_msg->private_data; | |
2121 | ||
24be6e81 | 2122 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2123 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
2124 | goto unlock; | |
2125 | ||
2126 | switch (cm_id_priv->id.state) { | |
2127 | case IB_CM_REP_SENT: | |
2128 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2129 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2130 | break; |
2131 | case IB_CM_ESTABLISHED: | |
2132 | case IB_CM_MRA_REP_RCVD: | |
2133 | break; | |
2134 | case IB_CM_TIMEWAIT: | |
9af57b7a SH |
2135 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2136 | counter[CM_DREQ_COUNTER]); | |
a977049d HR |
2137 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2138 | goto unlock; | |
2139 | ||
2140 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2141 | cm_id_priv->private_data, | |
2142 | cm_id_priv->private_data_len); | |
24be6e81 | 2143 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2144 | |
34816ad9 | 2145 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2146 | cm_free_msg(msg); |
2147 | goto deref; | |
9af57b7a SH |
2148 | case IB_CM_DREQ_RCVD: |
2149 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2150 | counter[CM_DREQ_COUNTER]); | |
2151 | goto unlock; | |
a977049d HR |
2152 | default: |
2153 | goto unlock; | |
2154 | } | |
2155 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
2156 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
2157 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2158 | if (!ret) | |
2159 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2160 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2161 | |
2162 | if (ret) | |
2163 | cm_process_work(cm_id_priv, work); | |
2164 | else | |
2165 | cm_deref_id(cm_id_priv); | |
2166 | return 0; | |
2167 | ||
24be6e81 | 2168 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2169 | deref: cm_deref_id(cm_id_priv); |
2170 | return -EINVAL; | |
2171 | } | |
2172 | ||
2173 | static int cm_drep_handler(struct cm_work *work) | |
2174 | { | |
2175 | struct cm_id_private *cm_id_priv; | |
2176 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2177 | int ret; |
2178 | ||
2179 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2180 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2181 | drep_msg->local_comm_id); | |
2182 | if (!cm_id_priv) | |
2183 | return -EINVAL; | |
2184 | ||
2185 | work->cm_event.private_data = &drep_msg->private_data; | |
2186 | ||
24be6e81 | 2187 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2188 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2189 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2190 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2191 | goto out; |
2192 | } | |
2193 | cm_enter_timewait(cm_id_priv); | |
2194 | ||
34816ad9 | 2195 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2196 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2197 | if (!ret) | |
2198 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2199 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2200 | |
2201 | if (ret) | |
2202 | cm_process_work(cm_id_priv, work); | |
2203 | else | |
2204 | cm_deref_id(cm_id_priv); | |
2205 | return 0; | |
2206 | out: | |
2207 | cm_deref_id(cm_id_priv); | |
2208 | return -EINVAL; | |
2209 | } | |
2210 | ||
2211 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2212 | enum ib_cm_rej_reason reason, | |
2213 | void *ari, | |
2214 | u8 ari_length, | |
2215 | const void *private_data, | |
2216 | u8 private_data_len) | |
2217 | { | |
2218 | struct cm_id_private *cm_id_priv; | |
2219 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2220 | unsigned long flags; |
2221 | int ret; | |
2222 | ||
2223 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2224 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2225 | return -EINVAL; | |
2226 | ||
2227 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2228 | ||
2229 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2230 | switch (cm_id->state) { | |
2231 | case IB_CM_REQ_SENT: | |
2232 | case IB_CM_MRA_REQ_RCVD: | |
2233 | case IB_CM_REQ_RCVD: | |
2234 | case IB_CM_MRA_REQ_SENT: | |
2235 | case IB_CM_REP_RCVD: | |
2236 | case IB_CM_MRA_REP_SENT: | |
2237 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2238 | if (!ret) | |
2239 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2240 | cm_id_priv, reason, ari, ari_length, | |
2241 | private_data, private_data_len); | |
2242 | ||
2243 | cm_reset_to_idle(cm_id_priv); | |
2244 | break; | |
2245 | case IB_CM_REP_SENT: | |
2246 | case IB_CM_MRA_REP_RCVD: | |
2247 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2248 | if (!ret) | |
2249 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2250 | cm_id_priv, reason, ari, ari_length, | |
2251 | private_data, private_data_len); | |
2252 | ||
2253 | cm_enter_timewait(cm_id_priv); | |
2254 | break; | |
2255 | default: | |
2256 | ret = -EINVAL; | |
2257 | goto out; | |
2258 | } | |
2259 | ||
2260 | if (ret) | |
2261 | goto out; | |
2262 | ||
34816ad9 | 2263 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2264 | if (ret) |
2265 | cm_free_msg(msg); | |
2266 | ||
2267 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2268 | return ret; | |
2269 | } | |
2270 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2271 | ||
2272 | static void cm_format_rej_event(struct cm_work *work) | |
2273 | { | |
2274 | struct cm_rej_msg *rej_msg; | |
2275 | struct ib_cm_rej_event_param *param; | |
2276 | ||
2277 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2278 | param = &work->cm_event.param.rej_rcvd; | |
2279 | param->ari = rej_msg->ari; | |
2280 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2281 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2282 | work->cm_event.private_data = &rej_msg->private_data; |
2283 | } | |
2284 | ||
2285 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2286 | { | |
2287 | struct cm_timewait_info *timewait_info; | |
2288 | struct cm_id_private *cm_id_priv; | |
97f52eb4 | 2289 | __be32 remote_id; |
a977049d HR |
2290 | |
2291 | remote_id = rej_msg->local_comm_id; | |
2292 | ||
97f52eb4 | 2293 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
24be6e81 | 2294 | spin_lock_irq(&cm.lock); |
97f52eb4 | 2295 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2296 | remote_id); |
2297 | if (!timewait_info) { | |
24be6e81 | 2298 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2299 | return NULL; |
2300 | } | |
f06d2653 SH |
2301 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2302 | (timewait_info->work.local_id ^ | |
2303 | cm.random_id_operand)); | |
a977049d HR |
2304 | if (cm_id_priv) { |
2305 | if (cm_id_priv->id.remote_id == remote_id) | |
2306 | atomic_inc(&cm_id_priv->refcount); | |
2307 | else | |
2308 | cm_id_priv = NULL; | |
2309 | } | |
24be6e81 | 2310 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2311 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
2312 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2313 | else | |
2314 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2315 | ||
2316 | return cm_id_priv; | |
2317 | } | |
2318 | ||
2319 | static int cm_rej_handler(struct cm_work *work) | |
2320 | { | |
2321 | struct cm_id_private *cm_id_priv; | |
2322 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
2323 | int ret; |
2324 | ||
2325 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2326 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2327 | if (!cm_id_priv) | |
2328 | return -EINVAL; | |
2329 | ||
2330 | cm_format_rej_event(work); | |
2331 | ||
24be6e81 | 2332 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2333 | switch (cm_id_priv->id.state) { |
2334 | case IB_CM_REQ_SENT: | |
2335 | case IB_CM_MRA_REQ_RCVD: | |
2336 | case IB_CM_REP_SENT: | |
2337 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2338 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2339 | /* fall through */ |
2340 | case IB_CM_REQ_RCVD: | |
2341 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2342 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2343 | cm_enter_timewait(cm_id_priv); |
2344 | else | |
2345 | cm_reset_to_idle(cm_id_priv); | |
2346 | break; | |
2347 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2348 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2349 | /* fall through */ |
2350 | case IB_CM_REP_RCVD: | |
2351 | case IB_CM_MRA_REP_SENT: | |
2352 | case IB_CM_ESTABLISHED: | |
2353 | cm_enter_timewait(cm_id_priv); | |
2354 | break; | |
2355 | default: | |
24be6e81 | 2356 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2357 | ret = -EINVAL; |
2358 | goto out; | |
2359 | } | |
2360 | ||
2361 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2362 | if (!ret) | |
2363 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2364 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2365 | |
2366 | if (ret) | |
2367 | cm_process_work(cm_id_priv, work); | |
2368 | else | |
2369 | cm_deref_id(cm_id_priv); | |
2370 | return 0; | |
2371 | out: | |
2372 | cm_deref_id(cm_id_priv); | |
2373 | return -EINVAL; | |
2374 | } | |
2375 | ||
2376 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2377 | u8 service_timeout, | |
2378 | const void *private_data, | |
2379 | u8 private_data_len) | |
2380 | { | |
2381 | struct cm_id_private *cm_id_priv; | |
2382 | struct ib_mad_send_buf *msg; | |
de98b693 SH |
2383 | enum ib_cm_state cm_state; |
2384 | enum ib_cm_lap_state lap_state; | |
2385 | enum cm_msg_response msg_response; | |
a977049d HR |
2386 | void *data; |
2387 | unsigned long flags; | |
2388 | int ret; | |
2389 | ||
2390 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2391 | return -EINVAL; | |
2392 | ||
2393 | data = cm_copy_private_data(private_data, private_data_len); | |
2394 | if (IS_ERR(data)) | |
2395 | return PTR_ERR(data); | |
2396 | ||
2397 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2398 | ||
2399 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2400 | switch(cm_id_priv->id.state) { | |
2401 | case IB_CM_REQ_RCVD: | |
de98b693 SH |
2402 | cm_state = IB_CM_MRA_REQ_SENT; |
2403 | lap_state = cm_id->lap_state; | |
2404 | msg_response = CM_MSG_RESPONSE_REQ; | |
a977049d HR |
2405 | break; |
2406 | case IB_CM_REP_RCVD: | |
de98b693 SH |
2407 | cm_state = IB_CM_MRA_REP_SENT; |
2408 | lap_state = cm_id->lap_state; | |
2409 | msg_response = CM_MSG_RESPONSE_REP; | |
a977049d HR |
2410 | break; |
2411 | case IB_CM_ESTABLISHED: | |
de98b693 SH |
2412 | cm_state = cm_id->state; |
2413 | lap_state = IB_CM_MRA_LAP_SENT; | |
2414 | msg_response = CM_MSG_RESPONSE_OTHER; | |
2415 | break; | |
2416 | default: | |
2417 | ret = -EINVAL; | |
2418 | goto error1; | |
2419 | } | |
2420 | ||
2421 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { | |
a977049d HR |
2422 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2423 | if (ret) | |
2424 | goto error1; | |
2425 | ||
2426 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
de98b693 | 2427 | msg_response, service_timeout, |
a977049d | 2428 | private_data, private_data_len); |
34816ad9 | 2429 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2430 | if (ret) |
2431 | goto error2; | |
a977049d | 2432 | } |
de98b693 SH |
2433 | |
2434 | cm_id->state = cm_state; | |
2435 | cm_id->lap_state = lap_state; | |
a977049d HR |
2436 | cm_id_priv->service_timeout = service_timeout; |
2437 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2438 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2439 | return 0; | |
2440 | ||
2441 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2442 | kfree(data); | |
2443 | return ret; | |
2444 | ||
2445 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2446 | kfree(data); | |
2447 | cm_free_msg(msg); | |
2448 | return ret; | |
2449 | } | |
2450 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2451 | ||
2452 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2453 | { | |
2454 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2455 | case CM_MSG_RESPONSE_REQ: | |
2456 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2457 | case CM_MSG_RESPONSE_REP: | |
2458 | case CM_MSG_RESPONSE_OTHER: | |
2459 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2460 | mra_msg->local_comm_id); | |
2461 | default: | |
2462 | return NULL; | |
2463 | } | |
2464 | } | |
2465 | ||
2466 | static int cm_mra_handler(struct cm_work *work) | |
2467 | { | |
2468 | struct cm_id_private *cm_id_priv; | |
2469 | struct cm_mra_msg *mra_msg; | |
a977049d HR |
2470 | int timeout, ret; |
2471 | ||
2472 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2473 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2474 | if (!cm_id_priv) | |
2475 | return -EINVAL; | |
2476 | ||
2477 | work->cm_event.private_data = &mra_msg->private_data; | |
2478 | work->cm_event.param.mra_rcvd.service_timeout = | |
2479 | cm_mra_get_service_timeout(mra_msg); | |
2480 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
1d846126 | 2481 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 2482 | |
24be6e81 | 2483 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2484 | switch (cm_id_priv->id.state) { |
2485 | case IB_CM_REQ_SENT: | |
2486 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2487 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2488 | cm_id_priv->msg, timeout)) |
a977049d HR |
2489 | goto out; |
2490 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2491 | break; | |
2492 | case IB_CM_REP_SENT: | |
2493 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2494 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2495 | cm_id_priv->msg, timeout)) |
a977049d HR |
2496 | goto out; |
2497 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2498 | break; | |
2499 | case IB_CM_ESTABLISHED: | |
2500 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2501 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2502 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
9af57b7a SH |
2503 | cm_id_priv->msg, timeout)) { |
2504 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2505 | atomic_long_inc(&work->port-> | |
2506 | counter_group[CM_RECV_DUPLICATES]. | |
2507 | counter[CM_MRA_COUNTER]); | |
a977049d | 2508 | goto out; |
9af57b7a | 2509 | } |
a977049d HR |
2510 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
2511 | break; | |
9af57b7a SH |
2512 | case IB_CM_MRA_REQ_RCVD: |
2513 | case IB_CM_MRA_REP_RCVD: | |
2514 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2515 | counter[CM_MRA_COUNTER]); | |
2516 | /* fall through */ | |
a977049d HR |
2517 | default: |
2518 | goto out; | |
2519 | } | |
2520 | ||
2521 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2522 | cm_id_priv->id.state; | |
2523 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2524 | if (!ret) | |
2525 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2526 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2527 | |
2528 | if (ret) | |
2529 | cm_process_work(cm_id_priv, work); | |
2530 | else | |
2531 | cm_deref_id(cm_id_priv); | |
2532 | return 0; | |
2533 | out: | |
24be6e81 | 2534 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2535 | cm_deref_id(cm_id_priv); |
2536 | return -EINVAL; | |
2537 | } | |
2538 | ||
2539 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2540 | struct cm_id_private *cm_id_priv, | |
2541 | struct ib_sa_path_rec *alternate_path, | |
2542 | const void *private_data, | |
2543 | u8 private_data_len) | |
2544 | { | |
2545 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2546 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2547 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2548 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2549 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2550 | /* todo: need remote CM response timeout */ | |
2551 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2552 | lap_msg->alt_local_lid = alternate_path->slid; | |
2553 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2554 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2555 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2556 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2557 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2558 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2559 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2560 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2561 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2562 | cm_lap_set_local_ack_timeout(lap_msg, | |
1d846126 SH |
2563 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
2564 | alternate_path->packet_life_time)); | |
a977049d HR |
2565 | |
2566 | if (private_data && private_data_len) | |
2567 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2568 | } | |
2569 | ||
2570 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2571 | struct ib_sa_path_rec *alternate_path, | |
2572 | const void *private_data, | |
2573 | u8 private_data_len) | |
2574 | { | |
2575 | struct cm_id_private *cm_id_priv; | |
2576 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2577 | unsigned long flags; |
2578 | int ret; | |
2579 | ||
2580 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2581 | return -EINVAL; | |
2582 | ||
2583 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2584 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2585 | if (cm_id->state != IB_CM_ESTABLISHED || | |
e1444b5a SH |
2586 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
2587 | cm_id->lap_state != IB_CM_LAP_IDLE)) { | |
a977049d HR |
2588 | ret = -EINVAL; |
2589 | goto out; | |
2590 | } | |
2591 | ||
e1444b5a SH |
2592 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
2593 | if (ret) | |
2594 | goto out; | |
1d846126 SH |
2595 | cm_id_priv->alt_av.timeout = |
2596 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2597 | cm_id_priv->alt_av.timeout - 1); | |
e1444b5a | 2598 | |
a977049d HR |
2599 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2600 | if (ret) | |
2601 | goto out; | |
2602 | ||
2603 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2604 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2605 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2606 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2607 | ||
34816ad9 | 2608 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2609 | if (ret) { |
2610 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2611 | cm_free_msg(msg); | |
2612 | return ret; | |
2613 | } | |
2614 | ||
2615 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2616 | cm_id_priv->msg = msg; | |
2617 | ||
2618 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2619 | return ret; | |
2620 | } | |
2621 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2622 | ||
e1444b5a SH |
2623 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
2624 | struct ib_sa_path_rec *path, | |
a977049d HR |
2625 | struct cm_lap_msg *lap_msg) |
2626 | { | |
2627 | memset(path, 0, sizeof *path); | |
2628 | path->dgid = lap_msg->alt_local_gid; | |
2629 | path->sgid = lap_msg->alt_remote_gid; | |
2630 | path->dlid = lap_msg->alt_local_lid; | |
2631 | path->slid = lap_msg->alt_remote_lid; | |
2632 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2633 | path->hop_limit = lap_msg->alt_hop_limit; | |
2634 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2635 | path->reversible = 1; | |
e1444b5a | 2636 | path->pkey = cm_id_priv->pkey; |
a977049d HR |
2637 | path->sl = cm_lap_get_sl(lap_msg); |
2638 | path->mtu_selector = IB_SA_EQ; | |
e1444b5a | 2639 | path->mtu = cm_id_priv->path_mtu; |
a977049d HR |
2640 | path->rate_selector = IB_SA_EQ; |
2641 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2642 | path->packet_life_time_selector = IB_SA_EQ; | |
2643 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2644 | path->packet_life_time -= (path->packet_life_time > 0); | |
2645 | } | |
2646 | ||
2647 | static int cm_lap_handler(struct cm_work *work) | |
2648 | { | |
2649 | struct cm_id_private *cm_id_priv; | |
2650 | struct cm_lap_msg *lap_msg; | |
2651 | struct ib_cm_lap_event_param *param; | |
2652 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2653 | int ret; |
2654 | ||
2655 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2656 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2657 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2658 | lap_msg->local_comm_id); | |
2659 | if (!cm_id_priv) | |
2660 | return -EINVAL; | |
2661 | ||
2662 | param = &work->cm_event.param.lap_rcvd; | |
2663 | param->alternate_path = &work->path[0]; | |
e1444b5a | 2664 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
a977049d HR |
2665 | work->cm_event.private_data = &lap_msg->private_data; |
2666 | ||
24be6e81 | 2667 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2668 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
2669 | goto unlock; | |
2670 | ||
2671 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 2672 | case IB_CM_LAP_UNINIT: |
a977049d HR |
2673 | case IB_CM_LAP_IDLE: |
2674 | break; | |
2675 | case IB_CM_MRA_LAP_SENT: | |
9af57b7a SH |
2676 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2677 | counter[CM_LAP_COUNTER]); | |
a977049d HR |
2678 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2679 | goto unlock; | |
2680 | ||
2681 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2682 | CM_MSG_RESPONSE_OTHER, | |
2683 | cm_id_priv->service_timeout, | |
2684 | cm_id_priv->private_data, | |
2685 | cm_id_priv->private_data_len); | |
24be6e81 | 2686 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2687 | |
34816ad9 | 2688 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2689 | cm_free_msg(msg); |
2690 | goto deref; | |
9af57b7a SH |
2691 | case IB_CM_LAP_RCVD: |
2692 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2693 | counter[CM_LAP_COUNTER]); | |
2694 | goto unlock; | |
a977049d HR |
2695 | default: |
2696 | goto unlock; | |
2697 | } | |
2698 | ||
2699 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2700 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e1444b5a SH |
2701 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2702 | work->mad_recv_wc->recv_buf.grh, | |
2703 | &cm_id_priv->av); | |
2704 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); | |
a977049d HR |
2705 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2706 | if (!ret) | |
2707 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2708 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2709 | |
2710 | if (ret) | |
2711 | cm_process_work(cm_id_priv, work); | |
2712 | else | |
2713 | cm_deref_id(cm_id_priv); | |
2714 | return 0; | |
2715 | ||
24be6e81 | 2716 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2717 | deref: cm_deref_id(cm_id_priv); |
2718 | return -EINVAL; | |
2719 | } | |
2720 | ||
2721 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2722 | struct cm_id_private *cm_id_priv, | |
2723 | enum ib_cm_apr_status status, | |
2724 | void *info, | |
2725 | u8 info_length, | |
2726 | const void *private_data, | |
2727 | u8 private_data_len) | |
2728 | { | |
2729 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2730 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2731 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2732 | apr_msg->ap_status = (u8) status; | |
2733 | ||
2734 | if (info && info_length) { | |
2735 | apr_msg->info_length = info_length; | |
2736 | memcpy(apr_msg->info, info, info_length); | |
2737 | } | |
2738 | ||
2739 | if (private_data && private_data_len) | |
2740 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2741 | } | |
2742 | ||
2743 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2744 | enum ib_cm_apr_status status, | |
2745 | void *info, | |
2746 | u8 info_length, | |
2747 | const void *private_data, | |
2748 | u8 private_data_len) | |
2749 | { | |
2750 | struct cm_id_private *cm_id_priv; | |
2751 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2752 | unsigned long flags; |
2753 | int ret; | |
2754 | ||
2755 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2756 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2757 | return -EINVAL; | |
2758 | ||
2759 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2760 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2761 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2762 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2763 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2764 | ret = -EINVAL; | |
2765 | goto out; | |
2766 | } | |
2767 | ||
2768 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2769 | if (ret) | |
2770 | goto out; | |
2771 | ||
2772 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2773 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2774 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2775 | if (ret) { |
2776 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2777 | cm_free_msg(msg); | |
2778 | return ret; | |
2779 | } | |
2780 | ||
2781 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2782 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2783 | return ret; | |
2784 | } | |
2785 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2786 | ||
2787 | static int cm_apr_handler(struct cm_work *work) | |
2788 | { | |
2789 | struct cm_id_private *cm_id_priv; | |
2790 | struct cm_apr_msg *apr_msg; | |
a977049d HR |
2791 | int ret; |
2792 | ||
2793 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2794 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2795 | apr_msg->local_comm_id); | |
2796 | if (!cm_id_priv) | |
2797 | return -EINVAL; /* Unmatched reply. */ | |
2798 | ||
2799 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2800 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2801 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2802 | work->cm_event.private_data = &apr_msg->private_data; | |
2803 | ||
24be6e81 | 2804 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2805 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
2806 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2807 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 2808 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2809 | goto out; |
2810 | } | |
2811 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2812 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2813 | cm_id_priv->msg = NULL; |
2814 | ||
2815 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2816 | if (!ret) | |
2817 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2818 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2819 | |
2820 | if (ret) | |
2821 | cm_process_work(cm_id_priv, work); | |
2822 | else | |
2823 | cm_deref_id(cm_id_priv); | |
2824 | return 0; | |
2825 | out: | |
2826 | cm_deref_id(cm_id_priv); | |
2827 | return -EINVAL; | |
2828 | } | |
2829 | ||
2830 | static int cm_timewait_handler(struct cm_work *work) | |
2831 | { | |
2832 | struct cm_timewait_info *timewait_info; | |
2833 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2834 | int ret; |
2835 | ||
2836 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2837 | spin_lock_irq(&cm.lock); |
2838 | list_del(&timewait_info->list); | |
2839 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2840 | |
2841 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2842 | timewait_info->work.remote_id); | |
2843 | if (!cm_id_priv) | |
2844 | return -EINVAL; | |
2845 | ||
8575329d | 2846 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2847 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2848 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2849 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2850 | goto out; |
2851 | } | |
2852 | cm_id_priv->id.state = IB_CM_IDLE; | |
2853 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2854 | if (!ret) | |
2855 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2856 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2857 | |
2858 | if (ret) | |
2859 | cm_process_work(cm_id_priv, work); | |
2860 | else | |
2861 | cm_deref_id(cm_id_priv); | |
2862 | return 0; | |
2863 | out: | |
2864 | cm_deref_id(cm_id_priv); | |
2865 | return -EINVAL; | |
2866 | } | |
2867 | ||
2868 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2869 | struct cm_id_private *cm_id_priv, | |
2870 | struct ib_cm_sidr_req_param *param) | |
2871 | { | |
2872 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2873 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2874 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
a88f4888 | 2875 | sidr_req_msg->pkey = param->path->pkey; |
a977049d HR |
2876 | sidr_req_msg->service_id = param->service_id; |
2877 | ||
2878 | if (param->private_data && param->private_data_len) | |
2879 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2880 | param->private_data_len); | |
2881 | } | |
2882 | ||
2883 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2884 | struct ib_cm_sidr_req_param *param) | |
2885 | { | |
2886 | struct cm_id_private *cm_id_priv; | |
2887 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2888 | unsigned long flags; |
2889 | int ret; | |
2890 | ||
2891 | if (!param->path || (param->private_data && | |
2892 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2893 | return -EINVAL; | |
2894 | ||
2895 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2896 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2897 | if (ret) | |
2898 | goto out; | |
2899 | ||
2900 | cm_id->service_id = param->service_id; | |
97f52eb4 | 2901 | cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2902 | cm_id_priv->timeout_ms = param->timeout_ms; |
2903 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2904 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2905 | if (ret) | |
2906 | goto out; | |
2907 | ||
2908 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2909 | param); | |
34816ad9 | 2910 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2911 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2912 | ||
2913 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2914 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2915 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2916 | else |
2917 | ret = -EINVAL; | |
2918 | ||
2919 | if (ret) { | |
2920 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2921 | cm_free_msg(msg); | |
2922 | goto out; | |
2923 | } | |
2924 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2925 | cm_id_priv->msg = msg; | |
2926 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2927 | out: | |
2928 | return ret; | |
2929 | } | |
2930 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2931 | ||
2932 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2933 | struct ib_cm_id *listen_id) | |
2934 | { | |
2935 | struct cm_sidr_req_msg *sidr_req_msg; | |
2936 | struct ib_cm_sidr_req_event_param *param; | |
2937 | ||
2938 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2939 | work->mad_recv_wc->recv_buf.mad; | |
2940 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2941 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2942 | param->listen_id = listen_id; |
a977049d HR |
2943 | param->port = work->port->port_num; |
2944 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2945 | } | |
2946 | ||
2947 | static int cm_sidr_req_handler(struct cm_work *work) | |
2948 | { | |
2949 | struct ib_cm_id *cm_id; | |
2950 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2951 | struct cm_sidr_req_msg *sidr_req_msg; | |
2952 | struct ib_wc *wc; | |
a977049d | 2953 | |
d4c4196f | 2954 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
2955 | if (IS_ERR(cm_id)) |
2956 | return PTR_ERR(cm_id); | |
2957 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2958 | ||
2959 | /* Record SGID/SLID and request ID for lookup. */ | |
2960 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2961 | work->mad_recv_wc->recv_buf.mad; | |
2962 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 2963 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
2964 | cm_id_priv->av.dgid.global.interface_id = 0; |
2965 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 2966 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
2967 | &cm_id_priv->av); |
2968 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
a977049d HR |
2969 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
2970 | atomic_inc(&cm_id_priv->work_count); | |
2971 | ||
24be6e81 | 2972 | spin_lock_irq(&cm.lock); |
a977049d HR |
2973 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
2974 | if (cur_cm_id_priv) { | |
24be6e81 | 2975 | spin_unlock_irq(&cm.lock); |
9af57b7a SH |
2976 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2977 | counter[CM_SIDR_REQ_COUNTER]); | |
a977049d HR |
2978 | goto out; /* Duplicate message. */ |
2979 | } | |
29c2731c | 2980 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
07d357d0 | 2981 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
2982 | sidr_req_msg->service_id, |
2983 | sidr_req_msg->private_data); | |
a977049d | 2984 | if (!cur_cm_id_priv) { |
24be6e81 | 2985 | spin_unlock_irq(&cm.lock); |
6164c8cd | 2986 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
a977049d HR |
2987 | goto out; /* No match. */ |
2988 | } | |
2989 | atomic_inc(&cur_cm_id_priv->refcount); | |
24be6e81 | 2990 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2991 | |
2992 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
2993 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
2994 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
97f52eb4 | 2995 | cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
a977049d HR |
2996 | |
2997 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
2998 | cm_process_work(cm_id_priv, work); | |
2999 | cm_deref_id(cur_cm_id_priv); | |
3000 | return 0; | |
3001 | out: | |
3002 | ib_destroy_cm_id(&cm_id_priv->id); | |
3003 | return -EINVAL; | |
3004 | } | |
3005 | ||
3006 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
3007 | struct cm_id_private *cm_id_priv, | |
3008 | struct ib_cm_sidr_rep_param *param) | |
3009 | { | |
3010 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
3011 | cm_id_priv->tid); | |
3012 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
3013 | sidr_rep_msg->status = param->status; | |
3014 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
3015 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
3016 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
3017 | ||
3018 | if (param->info && param->info_length) | |
3019 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
3020 | ||
3021 | if (param->private_data && param->private_data_len) | |
3022 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
3023 | param->private_data_len); | |
3024 | } | |
3025 | ||
3026 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
3027 | struct ib_cm_sidr_rep_param *param) | |
3028 | { | |
3029 | struct cm_id_private *cm_id_priv; | |
3030 | struct ib_mad_send_buf *msg; | |
a977049d HR |
3031 | unsigned long flags; |
3032 | int ret; | |
3033 | ||
3034 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
3035 | (param->private_data && | |
3036 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
3037 | return -EINVAL; | |
3038 | ||
3039 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3040 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3041 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
3042 | ret = -EINVAL; | |
3043 | goto error; | |
3044 | } | |
3045 | ||
3046 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
3047 | if (ret) | |
3048 | goto error; | |
3049 | ||
3050 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
3051 | param); | |
34816ad9 | 3052 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
3053 | if (ret) { |
3054 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3055 | cm_free_msg(msg); | |
3056 | return ret; | |
3057 | } | |
3058 | cm_id->state = IB_CM_IDLE; | |
3059 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3060 | ||
3061 | spin_lock_irqsave(&cm.lock, flags); | |
3062 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
3063 | spin_unlock_irqrestore(&cm.lock, flags); | |
3064 | return 0; | |
3065 | ||
3066 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3067 | return ret; | |
3068 | } | |
3069 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
3070 | ||
3071 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
3072 | { | |
3073 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3074 | struct ib_cm_sidr_rep_event_param *param; | |
3075 | ||
3076 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3077 | work->mad_recv_wc->recv_buf.mad; | |
3078 | param = &work->cm_event.param.sidr_rep_rcvd; | |
3079 | param->status = sidr_rep_msg->status; | |
3080 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
3081 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
3082 | param->info = &sidr_rep_msg->info; | |
3083 | param->info_len = sidr_rep_msg->info_length; | |
3084 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
3085 | } | |
3086 | ||
3087 | static int cm_sidr_rep_handler(struct cm_work *work) | |
3088 | { | |
3089 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3090 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
3091 | |
3092 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3093 | work->mad_recv_wc->recv_buf.mad; | |
3094 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
3095 | if (!cm_id_priv) | |
3096 | return -EINVAL; /* Unmatched reply. */ | |
3097 | ||
24be6e81 | 3098 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 3099 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 3100 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3101 | goto out; |
3102 | } | |
3103 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 3104 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 3105 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3106 | |
3107 | cm_format_sidr_rep_event(work); | |
3108 | cm_process_work(cm_id_priv, work); | |
3109 | return 0; | |
3110 | out: | |
3111 | cm_deref_id(cm_id_priv); | |
3112 | return -EINVAL; | |
3113 | } | |
3114 | ||
3115 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
3116 | enum ib_wc_status wc_status) | |
3117 | { | |
3118 | struct cm_id_private *cm_id_priv; | |
3119 | struct ib_cm_event cm_event; | |
3120 | enum ib_cm_state state; | |
a977049d HR |
3121 | int ret; |
3122 | ||
3123 | memset(&cm_event, 0, sizeof cm_event); | |
3124 | cm_id_priv = msg->context[0]; | |
3125 | ||
3126 | /* Discard old sends or ones without a response. */ | |
24be6e81 | 3127 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3128 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
3129 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
3130 | goto discard; | |
3131 | ||
3132 | switch (state) { | |
3133 | case IB_CM_REQ_SENT: | |
3134 | case IB_CM_MRA_REQ_RCVD: | |
3135 | cm_reset_to_idle(cm_id_priv); | |
3136 | cm_event.event = IB_CM_REQ_ERROR; | |
3137 | break; | |
3138 | case IB_CM_REP_SENT: | |
3139 | case IB_CM_MRA_REP_RCVD: | |
3140 | cm_reset_to_idle(cm_id_priv); | |
3141 | cm_event.event = IB_CM_REP_ERROR; | |
3142 | break; | |
3143 | case IB_CM_DREQ_SENT: | |
3144 | cm_enter_timewait(cm_id_priv); | |
3145 | cm_event.event = IB_CM_DREQ_ERROR; | |
3146 | break; | |
3147 | case IB_CM_SIDR_REQ_SENT: | |
3148 | cm_id_priv->id.state = IB_CM_IDLE; | |
3149 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
3150 | break; | |
3151 | default: | |
3152 | goto discard; | |
3153 | } | |
24be6e81 | 3154 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3155 | cm_event.param.send_status = wc_status; |
3156 | ||
3157 | /* No other events can occur on the cm_id at this point. */ | |
3158 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
3159 | cm_free_msg(msg); | |
3160 | if (ret) | |
3161 | ib_destroy_cm_id(&cm_id_priv->id); | |
3162 | return; | |
3163 | discard: | |
24be6e81 | 3164 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3165 | cm_free_msg(msg); |
3166 | } | |
3167 | ||
3168 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
3169 | struct ib_mad_send_wc *mad_send_wc) | |
3170 | { | |
34816ad9 | 3171 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
9af57b7a SH |
3172 | struct cm_port *port; |
3173 | u16 attr_index; | |
3174 | ||
3175 | port = mad_agent->context; | |
3176 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) | |
3177 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; | |
3178 | ||
3179 | /* | |
3180 | * If the send was in response to a received message (context[0] is not | |
3181 | * set to a cm_id), and is not a REJ, then it is a send that was | |
3182 | * manually retried. | |
3183 | */ | |
3184 | if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) | |
3185 | msg->retries = 1; | |
3186 | ||
3187 | atomic_long_add(1 + msg->retries, | |
3188 | &port->counter_group[CM_XMIT].counter[attr_index]); | |
3189 | if (msg->retries) | |
3190 | atomic_long_add(msg->retries, | |
3191 | &port->counter_group[CM_XMIT_RETRIES]. | |
3192 | counter[attr_index]); | |
a977049d HR |
3193 | |
3194 | switch (mad_send_wc->status) { | |
3195 | case IB_WC_SUCCESS: | |
3196 | case IB_WC_WR_FLUSH_ERR: | |
3197 | cm_free_msg(msg); | |
3198 | break; | |
3199 | default: | |
3200 | if (msg->context[0] && msg->context[1]) | |
3201 | cm_process_send_error(msg, mad_send_wc->status); | |
3202 | else | |
3203 | cm_free_msg(msg); | |
3204 | break; | |
3205 | } | |
3206 | } | |
3207 | ||
c4028958 | 3208 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3209 | { |
c4028958 | 3210 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3211 | int ret; |
3212 | ||
3213 | switch (work->cm_event.event) { | |
3214 | case IB_CM_REQ_RECEIVED: | |
3215 | ret = cm_req_handler(work); | |
3216 | break; | |
3217 | case IB_CM_MRA_RECEIVED: | |
3218 | ret = cm_mra_handler(work); | |
3219 | break; | |
3220 | case IB_CM_REJ_RECEIVED: | |
3221 | ret = cm_rej_handler(work); | |
3222 | break; | |
3223 | case IB_CM_REP_RECEIVED: | |
3224 | ret = cm_rep_handler(work); | |
3225 | break; | |
3226 | case IB_CM_RTU_RECEIVED: | |
3227 | ret = cm_rtu_handler(work); | |
3228 | break; | |
3229 | case IB_CM_USER_ESTABLISHED: | |
3230 | ret = cm_establish_handler(work); | |
3231 | break; | |
3232 | case IB_CM_DREQ_RECEIVED: | |
3233 | ret = cm_dreq_handler(work); | |
3234 | break; | |
3235 | case IB_CM_DREP_RECEIVED: | |
3236 | ret = cm_drep_handler(work); | |
3237 | break; | |
3238 | case IB_CM_SIDR_REQ_RECEIVED: | |
3239 | ret = cm_sidr_req_handler(work); | |
3240 | break; | |
3241 | case IB_CM_SIDR_REP_RECEIVED: | |
3242 | ret = cm_sidr_rep_handler(work); | |
3243 | break; | |
3244 | case IB_CM_LAP_RECEIVED: | |
3245 | ret = cm_lap_handler(work); | |
3246 | break; | |
3247 | case IB_CM_APR_RECEIVED: | |
3248 | ret = cm_apr_handler(work); | |
3249 | break; | |
3250 | case IB_CM_TIMEWAIT_EXIT: | |
3251 | ret = cm_timewait_handler(work); | |
3252 | break; | |
3253 | default: | |
3254 | ret = -EINVAL; | |
3255 | break; | |
3256 | } | |
3257 | if (ret) | |
3258 | cm_free_work(work); | |
3259 | } | |
3260 | ||
e1444b5a | 3261 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3262 | { |
3263 | struct cm_id_private *cm_id_priv; | |
3264 | struct cm_work *work; | |
3265 | unsigned long flags; | |
3266 | int ret = 0; | |
3267 | ||
3268 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3269 | if (!work) | |
3270 | return -ENOMEM; | |
3271 | ||
3272 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3273 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3274 | switch (cm_id->state) | |
3275 | { | |
3276 | case IB_CM_REP_SENT: | |
3277 | case IB_CM_MRA_REP_RCVD: | |
3278 | cm_id->state = IB_CM_ESTABLISHED; | |
3279 | break; | |
3280 | case IB_CM_ESTABLISHED: | |
3281 | ret = -EISCONN; | |
3282 | break; | |
3283 | default: | |
3284 | ret = -EINVAL; | |
3285 | break; | |
3286 | } | |
3287 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3288 | ||
3289 | if (ret) { | |
3290 | kfree(work); | |
3291 | goto out; | |
3292 | } | |
3293 | ||
3294 | /* | |
3295 | * The CM worker thread may try to destroy the cm_id before it | |
3296 | * can execute this work item. To prevent potential deadlock, | |
3297 | * we need to find the cm_id once we're in the context of the | |
3298 | * worker thread, rather than holding a reference on it. | |
3299 | */ | |
c4028958 | 3300 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3301 | work->local_id = cm_id->local_id; |
3302 | work->remote_id = cm_id->remote_id; | |
3303 | work->mad_recv_wc = NULL; | |
3304 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
c4028958 | 3305 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3306 | out: |
3307 | return ret; | |
3308 | } | |
e1444b5a SH |
3309 | |
3310 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3311 | { | |
3312 | struct cm_id_private *cm_id_priv; | |
3313 | unsigned long flags; | |
3314 | int ret = 0; | |
3315 | ||
3316 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3317 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3318 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3319 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3320 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3321 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3322 | cm_id_priv->av = cm_id_priv->alt_av; | |
3323 | } else | |
3324 | ret = -EINVAL; | |
3325 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3326 | ||
3327 | return ret; | |
3328 | } | |
3329 | ||
3330 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3331 | { | |
3332 | int ret; | |
3333 | ||
3334 | switch (event) { | |
3335 | case IB_EVENT_COMM_EST: | |
3336 | ret = cm_establish(cm_id); | |
3337 | break; | |
3338 | case IB_EVENT_PATH_MIG: | |
3339 | ret = cm_migrate(cm_id); | |
3340 | break; | |
3341 | default: | |
3342 | ret = -EINVAL; | |
3343 | } | |
3344 | return ret; | |
3345 | } | |
3346 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3347 | |
3348 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3349 | struct ib_mad_recv_wc *mad_recv_wc) | |
3350 | { | |
9af57b7a | 3351 | struct cm_port *port = mad_agent->context; |
a977049d HR |
3352 | struct cm_work *work; |
3353 | enum ib_cm_event_type event; | |
9af57b7a | 3354 | u16 attr_id; |
a977049d HR |
3355 | int paths = 0; |
3356 | ||
3357 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3358 | case CM_REQ_ATTR_ID: | |
3359 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3360 | alt_local_lid != 0); | |
3361 | event = IB_CM_REQ_RECEIVED; | |
3362 | break; | |
3363 | case CM_MRA_ATTR_ID: | |
3364 | event = IB_CM_MRA_RECEIVED; | |
3365 | break; | |
3366 | case CM_REJ_ATTR_ID: | |
3367 | event = IB_CM_REJ_RECEIVED; | |
3368 | break; | |
3369 | case CM_REP_ATTR_ID: | |
3370 | event = IB_CM_REP_RECEIVED; | |
3371 | break; | |
3372 | case CM_RTU_ATTR_ID: | |
3373 | event = IB_CM_RTU_RECEIVED; | |
3374 | break; | |
3375 | case CM_DREQ_ATTR_ID: | |
3376 | event = IB_CM_DREQ_RECEIVED; | |
3377 | break; | |
3378 | case CM_DREP_ATTR_ID: | |
3379 | event = IB_CM_DREP_RECEIVED; | |
3380 | break; | |
3381 | case CM_SIDR_REQ_ATTR_ID: | |
3382 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3383 | break; | |
3384 | case CM_SIDR_REP_ATTR_ID: | |
3385 | event = IB_CM_SIDR_REP_RECEIVED; | |
3386 | break; | |
3387 | case CM_LAP_ATTR_ID: | |
3388 | paths = 1; | |
3389 | event = IB_CM_LAP_RECEIVED; | |
3390 | break; | |
3391 | case CM_APR_ATTR_ID: | |
3392 | event = IB_CM_APR_RECEIVED; | |
3393 | break; | |
3394 | default: | |
3395 | ib_free_recv_mad(mad_recv_wc); | |
3396 | return; | |
3397 | } | |
3398 | ||
9af57b7a SH |
3399 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
3400 | atomic_long_inc(&port->counter_group[CM_RECV]. | |
3401 | counter[attr_id - CM_ATTR_ID_OFFSET]); | |
3402 | ||
a977049d HR |
3403 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
3404 | GFP_KERNEL); | |
3405 | if (!work) { | |
3406 | ib_free_recv_mad(mad_recv_wc); | |
3407 | return; | |
3408 | } | |
3409 | ||
c4028958 | 3410 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3411 | work->cm_event.event = event; |
3412 | work->mad_recv_wc = mad_recv_wc; | |
9af57b7a | 3413 | work->port = port; |
c4028958 | 3414 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3415 | } |
3416 | ||
3417 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3418 | struct ib_qp_attr *qp_attr, | |
3419 | int *qp_attr_mask) | |
3420 | { | |
3421 | unsigned long flags; | |
3422 | int ret; | |
3423 | ||
3424 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3425 | switch (cm_id_priv->id.state) { | |
3426 | case IB_CM_REQ_SENT: | |
3427 | case IB_CM_MRA_REQ_RCVD: | |
3428 | case IB_CM_REQ_RCVD: | |
3429 | case IB_CM_MRA_REQ_SENT: | |
3430 | case IB_CM_REP_RCVD: | |
3431 | case IB_CM_MRA_REP_SENT: | |
3432 | case IB_CM_REP_SENT: | |
3433 | case IB_CM_MRA_REP_RCVD: | |
3434 | case IB_CM_ESTABLISHED: | |
3435 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3436 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 3437 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 3438 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3439 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3440 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3441 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3442 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3443 | ret = 0; | |
3444 | break; | |
3445 | default: | |
3446 | ret = -EINVAL; | |
3447 | break; | |
3448 | } | |
3449 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3450 | return ret; | |
3451 | } | |
3452 | ||
3453 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3454 | struct ib_qp_attr *qp_attr, | |
3455 | int *qp_attr_mask) | |
3456 | { | |
3457 | unsigned long flags; | |
3458 | int ret; | |
3459 | ||
3460 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3461 | switch (cm_id_priv->id.state) { | |
3462 | case IB_CM_REQ_RCVD: | |
3463 | case IB_CM_MRA_REQ_SENT: | |
3464 | case IB_CM_REP_RCVD: | |
3465 | case IB_CM_MRA_REP_SENT: | |
3466 | case IB_CM_REP_SENT: | |
3467 | case IB_CM_MRA_REP_RCVD: | |
3468 | case IB_CM_ESTABLISHED: | |
3469 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3470 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
3471 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
3472 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
3473 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3474 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
ae7971a7 SH |
3475 | if (cm_id_priv->qp_type == IB_QPT_RC) { |
3476 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | | |
3477 | IB_QP_MIN_RNR_TIMER; | |
3478 | qp_attr->max_dest_rd_atomic = | |
3479 | cm_id_priv->responder_resources; | |
3480 | qp_attr->min_rnr_timer = 0; | |
3481 | } | |
a977049d HR |
3482 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3483 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3484 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 3485 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 3486 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
3487 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3488 | } | |
3489 | ret = 0; | |
3490 | break; | |
3491 | default: | |
3492 | ret = -EINVAL; | |
3493 | break; | |
3494 | } | |
3495 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3496 | return ret; | |
3497 | } | |
3498 | ||
3499 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3500 | struct ib_qp_attr *qp_attr, | |
3501 | int *qp_attr_mask) | |
3502 | { | |
3503 | unsigned long flags; | |
3504 | int ret; | |
3505 | ||
3506 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3507 | switch (cm_id_priv->id.state) { | |
0fe313b0 SH |
3508 | /* Allow transition to RTS before sending REP */ |
3509 | case IB_CM_REQ_RCVD: | |
3510 | case IB_CM_MRA_REQ_SENT: | |
3511 | ||
a977049d HR |
3512 | case IB_CM_REP_RCVD: |
3513 | case IB_CM_MRA_REP_SENT: | |
3514 | case IB_CM_REP_SENT: | |
3515 | case IB_CM_MRA_REP_RCVD: | |
3516 | case IB_CM_ESTABLISHED: | |
e1444b5a SH |
3517 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
3518 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
3519 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
3520 | if (cm_id_priv->qp_type == IB_QPT_RC) { | |
3521 | *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
3522 | IB_QP_RNR_RETRY | | |
3523 | IB_QP_MAX_QP_RD_ATOMIC; | |
1d846126 | 3524 | qp_attr->timeout = cm_id_priv->av.timeout; |
e1444b5a SH |
3525 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
3526 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
3527 | qp_attr->max_rd_atomic = | |
3528 | cm_id_priv->initiator_depth; | |
3529 | } | |
3530 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3531 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3532 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3533 | } | |
3534 | } else { | |
3535 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
3536 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; | |
3537 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; | |
1d846126 | 3538 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 3539 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
3540 | qp_attr->path_mig_state = IB_MIG_REARM; |
3541 | } | |
3542 | ret = 0; | |
3543 | break; | |
3544 | default: | |
3545 | ret = -EINVAL; | |
3546 | break; | |
3547 | } | |
3548 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3549 | return ret; | |
3550 | } | |
3551 | ||
3552 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3553 | struct ib_qp_attr *qp_attr, | |
3554 | int *qp_attr_mask) | |
3555 | { | |
3556 | struct cm_id_private *cm_id_priv; | |
3557 | int ret; | |
3558 | ||
3559 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3560 | switch (qp_attr->qp_state) { | |
3561 | case IB_QPS_INIT: | |
3562 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3563 | break; | |
3564 | case IB_QPS_RTR: | |
3565 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3566 | break; | |
3567 | case IB_QPS_RTS: | |
3568 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3569 | break; | |
3570 | default: | |
3571 | ret = -EINVAL; | |
3572 | break; | |
3573 | } | |
3574 | return ret; | |
3575 | } | |
3576 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3577 | ||
454a01e7 | 3578 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
1d846126 SH |
3579 | { |
3580 | struct ib_device_attr attr; | |
3581 | ||
d4c4196f | 3582 | if (ib_query_device(cm_dev->ib_device, &attr)) |
1d846126 SH |
3583 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ |
3584 | else | |
3585 | cm_dev->ack_delay = attr.local_ca_ack_delay; | |
3586 | } | |
3587 | ||
9af57b7a SH |
3588 | static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, |
3589 | char *buf) | |
3590 | { | |
3591 | struct cm_counter_group *group; | |
3592 | struct cm_counter_attribute *cm_attr; | |
3593 | ||
3594 | group = container_of(obj, struct cm_counter_group, obj); | |
3595 | cm_attr = container_of(attr, struct cm_counter_attribute, attr); | |
3596 | ||
3597 | return sprintf(buf, "%ld\n", | |
3598 | atomic_long_read(&group->counter[cm_attr->index])); | |
3599 | } | |
3600 | ||
3601 | static struct sysfs_ops cm_counter_ops = { | |
3602 | .show = cm_show_counter | |
3603 | }; | |
3604 | ||
3605 | static struct kobj_type cm_counter_obj_type = { | |
3606 | .sysfs_ops = &cm_counter_ops, | |
3607 | .default_attrs = cm_counter_default_attrs | |
3608 | }; | |
3609 | ||
3610 | static void cm_release_port_obj(struct kobject *obj) | |
3611 | { | |
3612 | struct cm_port *cm_port; | |
3613 | ||
9af57b7a SH |
3614 | cm_port = container_of(obj, struct cm_port, port_obj); |
3615 | kfree(cm_port); | |
3616 | } | |
3617 | ||
3618 | static struct kobj_type cm_port_obj_type = { | |
3619 | .release = cm_release_port_obj | |
3620 | }; | |
3621 | ||
9af57b7a SH |
3622 | struct class cm_class = { |
3623 | .name = "infiniband_cm", | |
3624 | }; | |
3625 | EXPORT_SYMBOL(cm_class); | |
3626 | ||
9af57b7a SH |
3627 | static int cm_create_port_fs(struct cm_port *port) |
3628 | { | |
3629 | int i, ret; | |
3630 | ||
3631 | ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, | |
110cf374 | 3632 | &port->cm_dev->device->kobj, |
9af57b7a SH |
3633 | "%d", port->port_num); |
3634 | if (ret) { | |
3635 | kfree(port); | |
3636 | return ret; | |
3637 | } | |
3638 | ||
3639 | for (i = 0; i < CM_COUNTER_GROUPS; i++) { | |
3640 | ret = kobject_init_and_add(&port->counter_group[i].obj, | |
3641 | &cm_counter_obj_type, | |
7c7a9bcc | 3642 | &port->port_obj, |
9af57b7a SH |
3643 | "%s", counter_group_names[i]); |
3644 | if (ret) | |
3645 | goto error; | |
3646 | } | |
3647 | ||
3648 | return 0; | |
3649 | ||
3650 | error: | |
3651 | while (i--) | |
7c7a9bcc RD |
3652 | kobject_put(&port->counter_group[i].obj); |
3653 | kobject_put(&port->port_obj); | |
9af57b7a SH |
3654 | return ret; |
3655 | ||
3656 | } | |
3657 | ||
3658 | static void cm_remove_port_fs(struct cm_port *port) | |
3659 | { | |
3660 | int i; | |
3661 | ||
3662 | for (i = 0; i < CM_COUNTER_GROUPS; i++) | |
7c7a9bcc | 3663 | kobject_put(&port->counter_group[i].obj); |
9af57b7a | 3664 | |
7c7a9bcc | 3665 | kobject_put(&port->port_obj); |
9af57b7a SH |
3666 | } |
3667 | ||
d4c4196f | 3668 | static void cm_add_one(struct ib_device *ib_device) |
a977049d HR |
3669 | { |
3670 | struct cm_device *cm_dev; | |
3671 | struct cm_port *port; | |
3672 | struct ib_mad_reg_req reg_req = { | |
3673 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3674 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3675 | }; | |
3676 | struct ib_port_modify port_modify = { | |
3677 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3678 | }; | |
3679 | unsigned long flags; | |
3680 | int ret; | |
3681 | u8 i; | |
3682 | ||
d4c4196f | 3683 | if (rdma_node_get_transport(ib_device->node_type) != RDMA_TRANSPORT_IB) |
07ebafba TT |
3684 | return; |
3685 | ||
9af57b7a | 3686 | cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * |
d4c4196f | 3687 | ib_device->phys_port_cnt, GFP_KERNEL); |
a977049d HR |
3688 | if (!cm_dev) |
3689 | return; | |
3690 | ||
d4c4196f | 3691 | cm_dev->ib_device = ib_device; |
1d846126 | 3692 | cm_get_ack_delay(cm_dev); |
a977049d | 3693 | |
91bd418f GKH |
3694 | cm_dev->device = device_create(&cm_class, &ib_device->dev, |
3695 | MKDEV(0, 0), NULL, | |
3696 | "%s", ib_device->name); | |
110cf374 | 3697 | if (!cm_dev->device) { |
9af57b7a SH |
3698 | kfree(cm_dev); |
3699 | return; | |
3700 | } | |
3701 | ||
a977049d | 3702 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
d4c4196f | 3703 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
9af57b7a SH |
3704 | port = kzalloc(sizeof *port, GFP_KERNEL); |
3705 | if (!port) | |
3706 | goto error1; | |
3707 | ||
3708 | cm_dev->port[i-1] = port; | |
a977049d HR |
3709 | port->cm_dev = cm_dev; |
3710 | port->port_num = i; | |
9af57b7a SH |
3711 | |
3712 | ret = cm_create_port_fs(port); | |
3713 | if (ret) | |
3714 | goto error1; | |
3715 | ||
d4c4196f | 3716 | port->mad_agent = ib_register_mad_agent(ib_device, i, |
a977049d HR |
3717 | IB_QPT_GSI, |
3718 | ®_req, | |
3719 | 0, | |
3720 | cm_send_handler, | |
3721 | cm_recv_handler, | |
3722 | port); | |
3723 | if (IS_ERR(port->mad_agent)) | |
9af57b7a | 3724 | goto error2; |
a977049d | 3725 | |
d4c4196f | 3726 | ret = ib_modify_port(ib_device, i, 0, &port_modify); |
a977049d | 3727 | if (ret) |
9af57b7a | 3728 | goto error3; |
a977049d | 3729 | } |
d4c4196f | 3730 | ib_set_client_data(ib_device, &cm_client, cm_dev); |
a977049d HR |
3731 | |
3732 | write_lock_irqsave(&cm.device_lock, flags); | |
3733 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3734 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3735 | return; | |
3736 | ||
9af57b7a | 3737 | error3: |
cf311cd4 | 3738 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a SH |
3739 | error2: |
3740 | cm_remove_port_fs(port); | |
cf311cd4 | 3741 | error1: |
a977049d HR |
3742 | port_modify.set_port_cap_mask = 0; |
3743 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3744 | while (--i) { | |
9af57b7a | 3745 | port = cm_dev->port[i-1]; |
d4c4196f | 3746 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3747 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a | 3748 | cm_remove_port_fs(port); |
a977049d | 3749 | } |
110cf374 | 3750 | device_unregister(cm_dev->device); |
a7e80ce2 | 3751 | kfree(cm_dev); |
a977049d HR |
3752 | } |
3753 | ||
d4c4196f | 3754 | static void cm_remove_one(struct ib_device *ib_device) |
a977049d HR |
3755 | { |
3756 | struct cm_device *cm_dev; | |
3757 | struct cm_port *port; | |
3758 | struct ib_port_modify port_modify = { | |
3759 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3760 | }; | |
3761 | unsigned long flags; | |
3762 | int i; | |
3763 | ||
d4c4196f | 3764 | cm_dev = ib_get_client_data(ib_device, &cm_client); |
a977049d HR |
3765 | if (!cm_dev) |
3766 | return; | |
3767 | ||
3768 | write_lock_irqsave(&cm.device_lock, flags); | |
3769 | list_del(&cm_dev->list); | |
3770 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3771 | ||
d4c4196f | 3772 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
9af57b7a | 3773 | port = cm_dev->port[i-1]; |
d4c4196f | 3774 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3775 | ib_unregister_mad_agent(port->mad_agent); |
84ba284c | 3776 | flush_workqueue(cm.wq); |
9af57b7a | 3777 | cm_remove_port_fs(port); |
a977049d | 3778 | } |
110cf374 | 3779 | device_unregister(cm_dev->device); |
a7e80ce2 | 3780 | kfree(cm_dev); |
a977049d HR |
3781 | } |
3782 | ||
3783 | static int __init ib_cm_init(void) | |
3784 | { | |
3785 | int ret; | |
3786 | ||
3787 | memset(&cm, 0, sizeof cm); | |
3788 | INIT_LIST_HEAD(&cm.device_list); | |
3789 | rwlock_init(&cm.device_lock); | |
3790 | spin_lock_init(&cm.lock); | |
3791 | cm.listen_service_table = RB_ROOT; | |
3792 | cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); | |
3793 | cm.remote_id_table = RB_ROOT; | |
3794 | cm.remote_qp_table = RB_ROOT; | |
3795 | cm.remote_sidr_table = RB_ROOT; | |
3796 | idr_init(&cm.local_id_table); | |
f06d2653 | 3797 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
a977049d | 3798 | idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
8575329d | 3799 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d | 3800 | |
9af57b7a SH |
3801 | ret = class_register(&cm_class); |
3802 | if (ret) | |
a977049d HR |
3803 | return -ENOMEM; |
3804 | ||
9af57b7a SH |
3805 | cm.wq = create_workqueue("ib_cm"); |
3806 | if (!cm.wq) { | |
3807 | ret = -ENOMEM; | |
3808 | goto error1; | |
3809 | } | |
3810 | ||
a977049d HR |
3811 | ret = ib_register_client(&cm_client); |
3812 | if (ret) | |
9af57b7a | 3813 | goto error2; |
a977049d HR |
3814 | |
3815 | return 0; | |
9af57b7a | 3816 | error2: |
a977049d | 3817 | destroy_workqueue(cm.wq); |
9af57b7a SH |
3818 | error1: |
3819 | class_unregister(&cm_class); | |
a977049d HR |
3820 | return ret; |
3821 | } | |
3822 | ||
3823 | static void __exit ib_cm_cleanup(void) | |
3824 | { | |
8575329d SH |
3825 | struct cm_timewait_info *timewait_info, *tmp; |
3826 | ||
3827 | spin_lock_irq(&cm.lock); | |
3828 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3829 | cancel_delayed_work(&timewait_info->work.work); | |
3830 | spin_unlock_irq(&cm.lock); | |
3831 | ||
84ba284c | 3832 | ib_unregister_client(&cm_client); |
a977049d | 3833 | destroy_workqueue(cm.wq); |
8575329d SH |
3834 | |
3835 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3836 | list_del(&timewait_info->list); | |
3837 | kfree(timewait_info); | |
3838 | } | |
3839 | ||
9af57b7a | 3840 | class_unregister(&cm_class); |
5d7edb3c | 3841 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3842 | } |
3843 | ||
3844 | module_init(ib_cm_init); | |
3845 | module_exit(ib_cm_cleanup); | |
3846 |