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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> |
e4dd23d7 | 39 | #include <linux/module.h> |
a977049d HR |
40 | #include <linux/err.h> |
41 | #include <linux/idr.h> | |
42 | #include <linux/interrupt.h> | |
f06d2653 | 43 | #include <linux/random.h> |
a977049d HR |
44 | #include <linux/rbtree.h> |
45 | #include <linux/spinlock.h> | |
5a0e3ad6 | 46 | #include <linux/slab.h> |
9af57b7a | 47 | #include <linux/sysfs.h> |
a977049d | 48 | #include <linux/workqueue.h> |
110cf374 | 49 | #include <linux/kdev_t.h> |
dd5f03be | 50 | #include <linux/etherdevice.h> |
a977049d | 51 | |
a4d61e84 RD |
52 | #include <rdma/ib_cache.h> |
53 | #include <rdma/ib_cm.h> | |
a977049d HR |
54 | #include "cm_msgs.h" |
55 | ||
56 | MODULE_AUTHOR("Sean Hefty"); | |
57 | MODULE_DESCRIPTION("InfiniBand CM"); | |
58 | MODULE_LICENSE("Dual BSD/GPL"); | |
59 | ||
60 | static void cm_add_one(struct ib_device *device); | |
61 | static void cm_remove_one(struct ib_device *device); | |
62 | ||
63 | static struct ib_client cm_client = { | |
64 | .name = "cm", | |
65 | .add = cm_add_one, | |
66 | .remove = cm_remove_one | |
67 | }; | |
68 | ||
69 | static struct ib_cm { | |
70 | spinlock_t lock; | |
71 | struct list_head device_list; | |
72 | rwlock_t device_lock; | |
73 | struct rb_root listen_service_table; | |
74 | u64 listen_service_id; | |
75 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
76 | struct rb_root remote_qp_table; | |
77 | struct rb_root remote_id_table; | |
78 | struct rb_root remote_sidr_table; | |
79 | struct idr local_id_table; | |
f06d2653 | 80 | __be32 random_id_operand; |
8575329d | 81 | struct list_head timewait_list; |
a977049d HR |
82 | struct workqueue_struct *wq; |
83 | } cm; | |
84 | ||
9af57b7a SH |
85 | /* Counter indexes ordered by attribute ID */ |
86 | enum { | |
87 | CM_REQ_COUNTER, | |
88 | CM_MRA_COUNTER, | |
89 | CM_REJ_COUNTER, | |
90 | CM_REP_COUNTER, | |
91 | CM_RTU_COUNTER, | |
92 | CM_DREQ_COUNTER, | |
93 | CM_DREP_COUNTER, | |
94 | CM_SIDR_REQ_COUNTER, | |
95 | CM_SIDR_REP_COUNTER, | |
96 | CM_LAP_COUNTER, | |
97 | CM_APR_COUNTER, | |
98 | CM_ATTR_COUNT, | |
99 | CM_ATTR_ID_OFFSET = 0x0010, | |
100 | }; | |
101 | ||
102 | enum { | |
103 | CM_XMIT, | |
104 | CM_XMIT_RETRIES, | |
105 | CM_RECV, | |
106 | CM_RECV_DUPLICATES, | |
107 | CM_COUNTER_GROUPS | |
108 | }; | |
109 | ||
110 | static char const counter_group_names[CM_COUNTER_GROUPS] | |
111 | [sizeof("cm_rx_duplicates")] = { | |
112 | "cm_tx_msgs", "cm_tx_retries", | |
113 | "cm_rx_msgs", "cm_rx_duplicates" | |
114 | }; | |
115 | ||
116 | struct cm_counter_group { | |
117 | struct kobject obj; | |
118 | atomic_long_t counter[CM_ATTR_COUNT]; | |
119 | }; | |
120 | ||
121 | struct cm_counter_attribute { | |
122 | struct attribute attr; | |
123 | int index; | |
124 | }; | |
125 | ||
126 | #define CM_COUNTER_ATTR(_name, _index) \ | |
127 | struct cm_counter_attribute cm_##_name##_counter_attr = { \ | |
01e8ef11 | 128 | .attr = { .name = __stringify(_name), .mode = 0444 }, \ |
9af57b7a SH |
129 | .index = _index \ |
130 | } | |
131 | ||
132 | static CM_COUNTER_ATTR(req, CM_REQ_COUNTER); | |
133 | static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER); | |
134 | static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER); | |
135 | static CM_COUNTER_ATTR(rep, CM_REP_COUNTER); | |
136 | static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER); | |
137 | static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER); | |
138 | static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER); | |
139 | static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER); | |
140 | static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER); | |
141 | static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER); | |
142 | static CM_COUNTER_ATTR(apr, CM_APR_COUNTER); | |
143 | ||
144 | static struct attribute *cm_counter_default_attrs[] = { | |
145 | &cm_req_counter_attr.attr, | |
146 | &cm_mra_counter_attr.attr, | |
147 | &cm_rej_counter_attr.attr, | |
148 | &cm_rep_counter_attr.attr, | |
149 | &cm_rtu_counter_attr.attr, | |
150 | &cm_dreq_counter_attr.attr, | |
151 | &cm_drep_counter_attr.attr, | |
152 | &cm_sidr_req_counter_attr.attr, | |
153 | &cm_sidr_rep_counter_attr.attr, | |
154 | &cm_lap_counter_attr.attr, | |
155 | &cm_apr_counter_attr.attr, | |
156 | NULL | |
157 | }; | |
158 | ||
a977049d HR |
159 | struct cm_port { |
160 | struct cm_device *cm_dev; | |
161 | struct ib_mad_agent *mad_agent; | |
9af57b7a | 162 | struct kobject port_obj; |
a977049d | 163 | u8 port_num; |
9af57b7a | 164 | struct cm_counter_group counter_group[CM_COUNTER_GROUPS]; |
a977049d HR |
165 | }; |
166 | ||
167 | struct cm_device { | |
168 | struct list_head list; | |
d4c4196f | 169 | struct ib_device *ib_device; |
110cf374 | 170 | struct device *device; |
1d846126 | 171 | u8 ack_delay; |
be4b4993 | 172 | int going_down; |
9af57b7a | 173 | struct cm_port *port[0]; |
a977049d HR |
174 | }; |
175 | ||
176 | struct cm_av { | |
177 | struct cm_port *port; | |
178 | union ib_gid dgid; | |
179 | struct ib_ah_attr ah_attr; | |
180 | u16 pkey_index; | |
1d846126 | 181 | u8 timeout; |
dd5f03be MB |
182 | u8 valid; |
183 | u8 smac[ETH_ALEN]; | |
a977049d HR |
184 | }; |
185 | ||
186 | struct cm_work { | |
c4028958 | 187 | struct delayed_work work; |
a977049d HR |
188 | struct list_head list; |
189 | struct cm_port *port; | |
190 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
191 | __be32 local_id; /* Established / timewait */ |
192 | __be32 remote_id; | |
a977049d HR |
193 | struct ib_cm_event cm_event; |
194 | struct ib_sa_path_rec path[0]; | |
195 | }; | |
196 | ||
197 | struct cm_timewait_info { | |
198 | struct cm_work work; /* Must be first. */ | |
8575329d | 199 | struct list_head list; |
a977049d HR |
200 | struct rb_node remote_qp_node; |
201 | struct rb_node remote_id_node; | |
97f52eb4 SH |
202 | __be64 remote_ca_guid; |
203 | __be32 remote_qpn; | |
a977049d HR |
204 | u8 inserted_remote_qp; |
205 | u8 inserted_remote_id; | |
206 | }; | |
207 | ||
208 | struct cm_id_private { | |
209 | struct ib_cm_id id; | |
210 | ||
211 | struct rb_node service_node; | |
212 | struct rb_node sidr_id_node; | |
87fd1a11 | 213 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 214 | struct completion comp; |
a977049d HR |
215 | atomic_t refcount; |
216 | ||
217 | struct ib_mad_send_buf *msg; | |
218 | struct cm_timewait_info *timewait_info; | |
219 | /* todo: use alternate port on send failure */ | |
220 | struct cm_av av; | |
221 | struct cm_av alt_av; | |
6e61d04f | 222 | struct ib_cm_compare_data *compare_data; |
a977049d HR |
223 | |
224 | void *private_data; | |
97f52eb4 SH |
225 | __be64 tid; |
226 | __be32 local_qpn; | |
227 | __be32 remote_qpn; | |
ae7971a7 | 228 | enum ib_qp_type qp_type; |
97f52eb4 SH |
229 | __be32 sq_psn; |
230 | __be32 rq_psn; | |
a977049d HR |
231 | int timeout_ms; |
232 | enum ib_mtu path_mtu; | |
e1444b5a | 233 | __be16 pkey; |
a977049d HR |
234 | u8 private_data_len; |
235 | u8 max_cm_retries; | |
236 | u8 peer_to_peer; | |
237 | u8 responder_resources; | |
238 | u8 initiator_depth; | |
a977049d HR |
239 | u8 retry_count; |
240 | u8 rnr_retry_count; | |
241 | u8 service_timeout; | |
1d846126 | 242 | u8 target_ack_delay; |
a977049d HR |
243 | |
244 | struct list_head work_list; | |
245 | atomic_t work_count; | |
246 | }; | |
247 | ||
c4028958 | 248 | static void cm_work_handler(struct work_struct *work); |
a977049d HR |
249 | |
250 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
251 | { | |
252 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 253 | complete(&cm_id_priv->comp); |
a977049d HR |
254 | } |
255 | ||
256 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
257 | struct ib_mad_send_buf **msg) | |
258 | { | |
259 | struct ib_mad_agent *mad_agent; | |
260 | struct ib_mad_send_buf *m; | |
261 | struct ib_ah *ah; | |
262 | ||
263 | mad_agent = cm_id_priv->av.port->mad_agent; | |
264 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
265 | if (IS_ERR(ah)) | |
266 | return PTR_ERR(ah); | |
267 | ||
3cd96564 | 268 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
354ba39c | 269 | cm_id_priv->av.pkey_index, |
34816ad9 | 270 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
da2dfaa3 IW |
271 | GFP_ATOMIC, |
272 | IB_MGMT_BASE_VERSION); | |
a977049d HR |
273 | if (IS_ERR(m)) { |
274 | ib_destroy_ah(ah); | |
275 | return PTR_ERR(m); | |
276 | } | |
277 | ||
278 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
279 | m->ah = ah; |
280 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
281 | |
282 | atomic_inc(&cm_id_priv->refcount); | |
283 | m->context[0] = cm_id_priv; | |
284 | *msg = m; | |
285 | return 0; | |
286 | } | |
287 | ||
288 | static int cm_alloc_response_msg(struct cm_port *port, | |
289 | struct ib_mad_recv_wc *mad_recv_wc, | |
290 | struct ib_mad_send_buf **msg) | |
291 | { | |
292 | struct ib_mad_send_buf *m; | |
293 | struct ib_ah *ah; | |
294 | ||
295 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
296 | mad_recv_wc->recv_buf.grh, port->port_num); | |
297 | if (IS_ERR(ah)) | |
298 | return PTR_ERR(ah); | |
299 | ||
300 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 301 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
da2dfaa3 IW |
302 | GFP_ATOMIC, |
303 | IB_MGMT_BASE_VERSION); | |
a977049d HR |
304 | if (IS_ERR(m)) { |
305 | ib_destroy_ah(ah); | |
306 | return PTR_ERR(m); | |
307 | } | |
34816ad9 | 308 | m->ah = ah; |
a977049d HR |
309 | *msg = m; |
310 | return 0; | |
311 | } | |
312 | ||
313 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
314 | { | |
34816ad9 | 315 | ib_destroy_ah(msg->ah); |
a977049d HR |
316 | if (msg->context[0]) |
317 | cm_deref_id(msg->context[0]); | |
318 | ib_free_send_mad(msg); | |
319 | } | |
320 | ||
321 | static void * cm_copy_private_data(const void *private_data, | |
322 | u8 private_data_len) | |
323 | { | |
324 | void *data; | |
325 | ||
326 | if (!private_data || !private_data_len) | |
327 | return NULL; | |
328 | ||
bed8bdfd | 329 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
a977049d HR |
330 | if (!data) |
331 | return ERR_PTR(-ENOMEM); | |
332 | ||
a977049d HR |
333 | return data; |
334 | } | |
335 | ||
336 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
337 | void *private_data, u8 private_data_len) | |
338 | { | |
339 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
340 | kfree(cm_id_priv->private_data); | |
341 | ||
342 | cm_id_priv->private_data = private_data; | |
343 | cm_id_priv->private_data_len = private_data_len; | |
344 | } | |
345 | ||
ca222c6b SH |
346 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
347 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
348 | { |
349 | av->port = port; | |
350 | av->pkey_index = wc->pkey_index; | |
d4c4196f | 351 | ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc, |
ca222c6b | 352 | grh, &av->ah_attr); |
a977049d HR |
353 | } |
354 | ||
355 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
356 | { | |
357 | struct cm_device *cm_dev; | |
358 | struct cm_port *port = NULL; | |
359 | unsigned long flags; | |
360 | int ret; | |
361 | u8 p; | |
362 | ||
363 | read_lock_irqsave(&cm.device_lock, flags); | |
364 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
d4c4196f | 365 | if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid, |
a977049d | 366 | &p, NULL)) { |
9af57b7a | 367 | port = cm_dev->port[p-1]; |
a977049d HR |
368 | break; |
369 | } | |
370 | } | |
371 | read_unlock_irqrestore(&cm.device_lock, flags); | |
372 | ||
373 | if (!port) | |
374 | return -EINVAL; | |
375 | ||
d4c4196f | 376 | ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num, |
a977049d HR |
377 | be16_to_cpu(path->pkey), &av->pkey_index); |
378 | if (ret) | |
379 | return ret; | |
380 | ||
381 | av->port = port; | |
d4c4196f | 382 | ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path, |
ca222c6b | 383 | &av->ah_attr); |
1d846126 | 384 | av->timeout = path->packet_life_time + 1; |
dd5f03be MB |
385 | memcpy(av->smac, path->smac, sizeof(av->smac)); |
386 | ||
387 | av->valid = 1; | |
a977049d HR |
388 | return 0; |
389 | } | |
390 | ||
391 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
392 | { | |
393 | unsigned long flags; | |
3b069c5d | 394 | int id; |
a977049d | 395 | |
3b069c5d TH |
396 | idr_preload(GFP_KERNEL); |
397 | spin_lock_irqsave(&cm.lock, flags); | |
398 | ||
ab626d1a | 399 | id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT); |
3b069c5d TH |
400 | |
401 | spin_unlock_irqrestore(&cm.lock, flags); | |
402 | idr_preload_end(); | |
f06d2653 | 403 | |
1b90c137 | 404 | cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; |
3b069c5d | 405 | return id < 0 ? id : 0; |
a977049d HR |
406 | } |
407 | ||
97f52eb4 | 408 | static void cm_free_id(__be32 local_id) |
a977049d | 409 | { |
24be6e81 | 410 | spin_lock_irq(&cm.lock); |
f06d2653 SH |
411 | idr_remove(&cm.local_id_table, |
412 | (__force int) (local_id ^ cm.random_id_operand)); | |
24be6e81 | 413 | spin_unlock_irq(&cm.lock); |
a977049d HR |
414 | } |
415 | ||
97f52eb4 | 416 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
417 | { |
418 | struct cm_id_private *cm_id_priv; | |
419 | ||
f06d2653 SH |
420 | cm_id_priv = idr_find(&cm.local_id_table, |
421 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
422 | if (cm_id_priv) { |
423 | if (cm_id_priv->id.remote_id == remote_id) | |
424 | atomic_inc(&cm_id_priv->refcount); | |
425 | else | |
426 | cm_id_priv = NULL; | |
427 | } | |
428 | ||
429 | return cm_id_priv; | |
430 | } | |
431 | ||
97f52eb4 | 432 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
433 | { |
434 | struct cm_id_private *cm_id_priv; | |
a977049d | 435 | |
24be6e81 | 436 | spin_lock_irq(&cm.lock); |
a977049d | 437 | cm_id_priv = cm_get_id(local_id, remote_id); |
24be6e81 | 438 | spin_unlock_irq(&cm.lock); |
a977049d HR |
439 | |
440 | return cm_id_priv; | |
441 | } | |
442 | ||
0d0f738f | 443 | static void cm_mask_copy(u32 *dst, const u32 *src, const u32 *mask) |
6e61d04f SH |
444 | { |
445 | int i; | |
446 | ||
0d0f738f DA |
447 | for (i = 0; i < IB_CM_COMPARE_SIZE; i++) |
448 | dst[i] = src[i] & mask[i]; | |
6e61d04f SH |
449 | } |
450 | ||
451 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
452 | struct ib_cm_compare_data *dst_data) | |
453 | { | |
0d0f738f DA |
454 | u32 src[IB_CM_COMPARE_SIZE]; |
455 | u32 dst[IB_CM_COMPARE_SIZE]; | |
6e61d04f SH |
456 | |
457 | if (!src_data || !dst_data) | |
458 | return 0; | |
459 | ||
460 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
461 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
0d0f738f | 462 | return memcmp(src, dst, sizeof(src)); |
6e61d04f SH |
463 | } |
464 | ||
0d0f738f | 465 | static int cm_compare_private_data(u32 *private_data, |
6e61d04f SH |
466 | struct ib_cm_compare_data *dst_data) |
467 | { | |
0d0f738f | 468 | u32 src[IB_CM_COMPARE_SIZE]; |
6e61d04f SH |
469 | |
470 | if (!dst_data) | |
471 | return 0; | |
472 | ||
473 | cm_mask_copy(src, private_data, dst_data->mask); | |
0d0f738f | 474 | return memcmp(src, dst_data->data, sizeof(src)); |
6e61d04f SH |
475 | } |
476 | ||
a88f4888 RD |
477 | /* |
478 | * Trivial helpers to strip endian annotation and compare; the | |
479 | * endianness doesn't actually matter since we just need a stable | |
480 | * order for the RB tree. | |
481 | */ | |
482 | static int be32_lt(__be32 a, __be32 b) | |
483 | { | |
484 | return (__force u32) a < (__force u32) b; | |
485 | } | |
486 | ||
487 | static int be32_gt(__be32 a, __be32 b) | |
488 | { | |
489 | return (__force u32) a > (__force u32) b; | |
490 | } | |
491 | ||
492 | static int be64_lt(__be64 a, __be64 b) | |
493 | { | |
494 | return (__force u64) a < (__force u64) b; | |
495 | } | |
496 | ||
497 | static int be64_gt(__be64 a, __be64 b) | |
498 | { | |
499 | return (__force u64) a > (__force u64) b; | |
500 | } | |
501 | ||
a977049d HR |
502 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
503 | { | |
504 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
505 | struct rb_node *parent = NULL; | |
506 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
507 | __be64 service_id = cm_id_priv->id.service_id; |
508 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 509 | int data_cmp; |
a977049d HR |
510 | |
511 | while (*link) { | |
512 | parent = *link; | |
513 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
514 | service_node); | |
6e61d04f SH |
515 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
516 | cur_cm_id_priv->compare_data); | |
a977049d | 517 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 518 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
519 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
520 | !data_cmp) | |
07d357d0 SH |
521 | return cur_cm_id_priv; |
522 | ||
523 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
524 | link = &(*link)->rb_left; | |
525 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
526 | link = &(*link)->rb_right; | |
a88f4888 | 527 | else if (be64_lt(service_id, cur_cm_id_priv->id.service_id)) |
a977049d | 528 | link = &(*link)->rb_left; |
a88f4888 | 529 | else if (be64_gt(service_id, cur_cm_id_priv->id.service_id)) |
6e61d04f SH |
530 | link = &(*link)->rb_right; |
531 | else if (data_cmp < 0) | |
532 | link = &(*link)->rb_left; | |
a977049d HR |
533 | else |
534 | link = &(*link)->rb_right; | |
535 | } | |
536 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
537 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
538 | return NULL; | |
539 | } | |
540 | ||
07d357d0 | 541 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f | 542 | __be64 service_id, |
0d0f738f | 543 | u32 *private_data) |
a977049d HR |
544 | { |
545 | struct rb_node *node = cm.listen_service_table.rb_node; | |
546 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 547 | int data_cmp; |
a977049d HR |
548 | |
549 | while (node) { | |
550 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
551 | data_cmp = cm_compare_private_data(private_data, |
552 | cm_id_priv->compare_data); | |
a977049d | 553 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 554 | cm_id_priv->id.service_id && |
6e61d04f | 555 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 556 | return cm_id_priv; |
07d357d0 SH |
557 | |
558 | if (device < cm_id_priv->id.device) | |
559 | node = node->rb_left; | |
560 | else if (device > cm_id_priv->id.device) | |
561 | node = node->rb_right; | |
a88f4888 | 562 | else if (be64_lt(service_id, cm_id_priv->id.service_id)) |
a977049d | 563 | node = node->rb_left; |
a88f4888 | 564 | else if (be64_gt(service_id, cm_id_priv->id.service_id)) |
6e61d04f SH |
565 | node = node->rb_right; |
566 | else if (data_cmp < 0) | |
567 | node = node->rb_left; | |
a977049d HR |
568 | else |
569 | node = node->rb_right; | |
570 | } | |
571 | return NULL; | |
572 | } | |
573 | ||
574 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
575 | *timewait_info) | |
576 | { | |
577 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
578 | struct rb_node *parent = NULL; | |
579 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
580 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
581 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
582 | |
583 | while (*link) { | |
584 | parent = *link; | |
585 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
586 | remote_id_node); | |
a88f4888 | 587 | if (be32_lt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 588 | link = &(*link)->rb_left; |
a88f4888 | 589 | else if (be32_gt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 590 | link = &(*link)->rb_right; |
a88f4888 | 591 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 592 | link = &(*link)->rb_left; |
a88f4888 | 593 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
594 | link = &(*link)->rb_right; |
595 | else | |
596 | return cur_timewait_info; | |
597 | } | |
598 | timewait_info->inserted_remote_id = 1; | |
599 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
600 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
601 | return NULL; | |
602 | } | |
603 | ||
97f52eb4 SH |
604 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
605 | __be32 remote_id) | |
a977049d HR |
606 | { |
607 | struct rb_node *node = cm.remote_id_table.rb_node; | |
608 | struct cm_timewait_info *timewait_info; | |
609 | ||
610 | while (node) { | |
611 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
612 | remote_id_node); | |
a88f4888 | 613 | if (be32_lt(remote_id, timewait_info->work.remote_id)) |
a977049d | 614 | node = node->rb_left; |
a88f4888 | 615 | else if (be32_gt(remote_id, timewait_info->work.remote_id)) |
a977049d | 616 | node = node->rb_right; |
a88f4888 | 617 | else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d | 618 | node = node->rb_left; |
a88f4888 | 619 | else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d HR |
620 | node = node->rb_right; |
621 | else | |
622 | return timewait_info; | |
623 | } | |
624 | return NULL; | |
625 | } | |
626 | ||
627 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
628 | *timewait_info) | |
629 | { | |
630 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
631 | struct rb_node *parent = NULL; | |
632 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
633 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
634 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
635 | |
636 | while (*link) { | |
637 | parent = *link; | |
638 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
639 | remote_qp_node); | |
a88f4888 | 640 | if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 641 | link = &(*link)->rb_left; |
a88f4888 | 642 | else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 643 | link = &(*link)->rb_right; |
a88f4888 | 644 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 645 | link = &(*link)->rb_left; |
a88f4888 | 646 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
647 | link = &(*link)->rb_right; |
648 | else | |
649 | return cur_timewait_info; | |
650 | } | |
651 | timewait_info->inserted_remote_qp = 1; | |
652 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
653 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
654 | return NULL; | |
655 | } | |
656 | ||
657 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
658 | *cm_id_priv) | |
659 | { | |
660 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
661 | struct rb_node *parent = NULL; | |
662 | struct cm_id_private *cur_cm_id_priv; | |
663 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 664 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
665 | |
666 | while (*link) { | |
667 | parent = *link; | |
668 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
669 | sidr_id_node); | |
a88f4888 | 670 | if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d | 671 | link = &(*link)->rb_left; |
a88f4888 | 672 | else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d HR |
673 | link = &(*link)->rb_right; |
674 | else { | |
675 | int cmp; | |
676 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
677 | sizeof *port_gid); | |
678 | if (cmp < 0) | |
679 | link = &(*link)->rb_left; | |
680 | else if (cmp > 0) | |
681 | link = &(*link)->rb_right; | |
682 | else | |
683 | return cur_cm_id_priv; | |
684 | } | |
685 | } | |
686 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
687 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
688 | return NULL; | |
689 | } | |
690 | ||
691 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
692 | enum ib_cm_sidr_status status) | |
693 | { | |
694 | struct ib_cm_sidr_rep_param param; | |
695 | ||
696 | memset(¶m, 0, sizeof param); | |
697 | param.status = status; | |
698 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
699 | } | |
700 | ||
07d357d0 SH |
701 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
702 | ib_cm_handler cm_handler, | |
a977049d HR |
703 | void *context) |
704 | { | |
705 | struct cm_id_private *cm_id_priv; | |
706 | int ret; | |
707 | ||
de6eb66b | 708 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
709 | if (!cm_id_priv) |
710 | return ERR_PTR(-ENOMEM); | |
711 | ||
a977049d | 712 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 713 | cm_id_priv->id.device = device; |
a977049d HR |
714 | cm_id_priv->id.cm_handler = cm_handler; |
715 | cm_id_priv->id.context = context; | |
354ba39c | 716 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
717 | ret = cm_alloc_id(cm_id_priv); |
718 | if (ret) | |
719 | goto error; | |
720 | ||
721 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 722 | init_completion(&cm_id_priv->comp); |
a977049d HR |
723 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
724 | atomic_set(&cm_id_priv->work_count, -1); | |
725 | atomic_set(&cm_id_priv->refcount, 1); | |
726 | return &cm_id_priv->id; | |
727 | ||
728 | error: | |
729 | kfree(cm_id_priv); | |
730 | return ERR_PTR(-ENOMEM); | |
731 | } | |
732 | EXPORT_SYMBOL(ib_create_cm_id); | |
733 | ||
734 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
735 | { | |
736 | struct cm_work *work; | |
737 | ||
738 | if (list_empty(&cm_id_priv->work_list)) | |
739 | return NULL; | |
740 | ||
741 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
742 | list_del(&work->list); | |
743 | return work; | |
744 | } | |
745 | ||
746 | static void cm_free_work(struct cm_work *work) | |
747 | { | |
748 | if (work->mad_recv_wc) | |
749 | ib_free_recv_mad(work->mad_recv_wc); | |
750 | kfree(work); | |
751 | } | |
752 | ||
753 | static inline int cm_convert_to_ms(int iba_time) | |
754 | { | |
755 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
756 | return 1 << max(iba_time - 8, 0); | |
757 | } | |
758 | ||
1d846126 SH |
759 | /* |
760 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time | |
761 | * Because of how ack_timeout is stored, adding one doubles the timeout. | |
762 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and | |
763 | * increment it (round up) only if the other is within 50%. | |
764 | */ | |
765 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) | |
766 | { | |
767 | int ack_timeout = packet_life_time + 1; | |
768 | ||
769 | if (ack_timeout >= ca_ack_delay) | |
770 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); | |
771 | else | |
772 | ack_timeout = ca_ack_delay + | |
773 | (ack_timeout >= (ca_ack_delay - 1)); | |
774 | ||
775 | return min(31, ack_timeout); | |
776 | } | |
777 | ||
a977049d HR |
778 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
779 | { | |
a977049d HR |
780 | if (timewait_info->inserted_remote_id) { |
781 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
782 | timewait_info->inserted_remote_id = 0; | |
783 | } | |
784 | ||
785 | if (timewait_info->inserted_remote_qp) { | |
786 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
787 | timewait_info->inserted_remote_qp = 0; | |
788 | } | |
a977049d HR |
789 | } |
790 | ||
97f52eb4 | 791 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
792 | { |
793 | struct cm_timewait_info *timewait_info; | |
794 | ||
de6eb66b | 795 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
796 | if (!timewait_info) |
797 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
798 | |
799 | timewait_info->work.local_id = local_id; | |
c4028958 | 800 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
a977049d HR |
801 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
802 | return timewait_info; | |
803 | } | |
804 | ||
805 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
806 | { | |
807 | int wait_time; | |
8575329d | 808 | unsigned long flags; |
be4b4993 ES |
809 | struct cm_device *cm_dev; |
810 | ||
811 | cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client); | |
812 | if (!cm_dev) | |
813 | return; | |
a977049d | 814 | |
8575329d | 815 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 816 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
817 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
818 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 819 | |
a977049d HR |
820 | /* |
821 | * The cm_id could be destroyed by the user before we exit timewait. | |
822 | * To protect against this, we search for the cm_id after exiting | |
823 | * timewait before notifying the user that we've exited timewait. | |
824 | */ | |
825 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
1d846126 | 826 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
be4b4993 ES |
827 | |
828 | /* Check if the device started its remove_one */ | |
829 | spin_lock_irq(&cm.lock); | |
830 | if (!cm_dev->going_down) | |
831 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
832 | msecs_to_jiffies(wait_time)); | |
833 | spin_unlock_irq(&cm.lock); | |
834 | ||
a977049d HR |
835 | cm_id_priv->timewait_info = NULL; |
836 | } | |
837 | ||
838 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
839 | { | |
8575329d SH |
840 | unsigned long flags; |
841 | ||
a977049d HR |
842 | cm_id_priv->id.state = IB_CM_IDLE; |
843 | if (cm_id_priv->timewait_info) { | |
8575329d | 844 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 845 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 846 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
847 | kfree(cm_id_priv->timewait_info); |
848 | cm_id_priv->timewait_info = NULL; | |
849 | } | |
850 | } | |
851 | ||
04c33543 | 852 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
853 | { |
854 | struct cm_id_private *cm_id_priv; | |
855 | struct cm_work *work; | |
a977049d HR |
856 | |
857 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
858 | retest: | |
24be6e81 | 859 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
860 | switch (cm_id->state) { |
861 | case IB_CM_LISTEN: | |
862 | cm_id->state = IB_CM_IDLE; | |
24be6e81 SH |
863 | spin_unlock_irq(&cm_id_priv->lock); |
864 | spin_lock_irq(&cm.lock); | |
a977049d | 865 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
24be6e81 | 866 | spin_unlock_irq(&cm.lock); |
a977049d HR |
867 | break; |
868 | case IB_CM_SIDR_REQ_SENT: | |
869 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 870 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 871 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
872 | break; |
873 | case IB_CM_SIDR_REQ_RCVD: | |
24be6e81 | 874 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
875 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
876 | break; | |
877 | case IB_CM_REQ_SENT: | |
c29ed5a4 | 878 | case IB_CM_MRA_REQ_RCVD: |
227eca83 | 879 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 880 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 | 881 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
e971b8cd SH |
882 | &cm_id_priv->id.device->node_guid, |
883 | sizeof cm_id_priv->id.device->node_guid, | |
227eca83 SH |
884 | NULL, 0); |
885 | break; | |
04c33543 MT |
886 | case IB_CM_REQ_RCVD: |
887 | if (err == -ENOMEM) { | |
888 | /* Do not reject to allow future retries. */ | |
889 | cm_reset_to_idle(cm_id_priv); | |
24be6e81 | 890 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 | 891 | } else { |
24be6e81 | 892 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 MT |
893 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
894 | NULL, 0, NULL, 0); | |
895 | } | |
896 | break; | |
a977049d HR |
897 | case IB_CM_REP_SENT: |
898 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 899 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 900 | /* Fall through */ |
a977049d HR |
901 | case IB_CM_MRA_REQ_SENT: |
902 | case IB_CM_REP_RCVD: | |
903 | case IB_CM_MRA_REP_SENT: | |
24be6e81 | 904 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 SH |
905 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
906 | NULL, 0, NULL, 0); | |
a977049d HR |
907 | break; |
908 | case IB_CM_ESTABLISHED: | |
24be6e81 | 909 | spin_unlock_irq(&cm_id_priv->lock); |
2622e18e SH |
910 | if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) |
911 | break; | |
a977049d HR |
912 | ib_send_cm_dreq(cm_id, NULL, 0); |
913 | goto retest; | |
914 | case IB_CM_DREQ_SENT: | |
34816ad9 | 915 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 916 | cm_enter_timewait(cm_id_priv); |
24be6e81 | 917 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
918 | break; |
919 | case IB_CM_DREQ_RCVD: | |
24be6e81 | 920 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
921 | ib_send_cm_drep(cm_id, NULL, 0); |
922 | break; | |
923 | default: | |
24be6e81 | 924 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
925 | break; |
926 | } | |
927 | ||
928 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
929 | cm_deref_id(cm_id_priv); |
930 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
931 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
932 | cm_free_work(work); | |
6e61d04f SH |
933 | kfree(cm_id_priv->compare_data); |
934 | kfree(cm_id_priv->private_data); | |
a977049d HR |
935 | kfree(cm_id_priv); |
936 | } | |
04c33543 MT |
937 | |
938 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
939 | { | |
940 | cm_destroy_id(cm_id, 0); | |
941 | } | |
a977049d HR |
942 | EXPORT_SYMBOL(ib_destroy_cm_id); |
943 | ||
6e61d04f SH |
944 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
945 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
946 | { |
947 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
948 | unsigned long flags; | |
949 | int ret = 0; | |
950 | ||
9c3da099 | 951 | service_mask = service_mask ? service_mask : ~cpu_to_be64(0); |
a977049d HR |
952 | service_id &= service_mask; |
953 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
954 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
955 | return -EINVAL; | |
956 | ||
957 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
958 | if (cm_id->state != IB_CM_IDLE) |
959 | return -EINVAL; | |
960 | ||
961 | if (compare_data) { | |
962 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
963 | GFP_KERNEL); | |
964 | if (!cm_id_priv->compare_data) | |
965 | return -ENOMEM; | |
966 | cm_mask_copy(cm_id_priv->compare_data->data, | |
967 | compare_data->data, compare_data->mask); | |
968 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
0d0f738f | 969 | sizeof(compare_data->mask)); |
6e61d04f | 970 | } |
a977049d HR |
971 | |
972 | cm_id->state = IB_CM_LISTEN; | |
973 | ||
974 | spin_lock_irqsave(&cm.lock, flags); | |
975 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 | 976 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
9c3da099 | 977 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
978 | } else { |
979 | cm_id->service_id = service_id; | |
980 | cm_id->service_mask = service_mask; | |
981 | } | |
982 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
983 | spin_unlock_irqrestore(&cm.lock, flags); | |
984 | ||
985 | if (cur_cm_id_priv) { | |
986 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
987 | kfree(cm_id_priv->compare_data); |
988 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
989 | ret = -EBUSY; |
990 | } | |
991 | return ret; | |
992 | } | |
993 | EXPORT_SYMBOL(ib_cm_listen); | |
994 | ||
97f52eb4 SH |
995 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
996 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
997 | { |
998 | u64 hi_tid, low_tid; | |
999 | ||
1000 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
1001 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
1002 | (msg_seq << 30)); | |
a977049d HR |
1003 | return cpu_to_be64(hi_tid | low_tid); |
1004 | } | |
1005 | ||
1006 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 1007 | __be16 attr_id, __be64 tid) |
a977049d HR |
1008 | { |
1009 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
1010 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
1011 | hdr->class_version = IB_CM_CLASS_VERSION; | |
1012 | hdr->method = IB_MGMT_METHOD_SEND; | |
1013 | hdr->attr_id = attr_id; | |
1014 | hdr->tid = tid; | |
1015 | } | |
1016 | ||
1017 | static void cm_format_req(struct cm_req_msg *req_msg, | |
1018 | struct cm_id_private *cm_id_priv, | |
1019 | struct ib_cm_req_param *param) | |
1020 | { | |
3971c9f6 SH |
1021 | struct ib_sa_path_rec *pri_path = param->primary_path; |
1022 | struct ib_sa_path_rec *alt_path = param->alternate_path; | |
1023 | ||
a977049d HR |
1024 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
1025 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
1026 | ||
1027 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
1028 | req_msg->service_id = param->service_id; | |
e971b8cd | 1029 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1030 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
a977049d HR |
1031 | cm_req_set_init_depth(req_msg, param->initiator_depth); |
1032 | cm_req_set_remote_resp_timeout(req_msg, | |
1033 | param->remote_cm_response_timeout); | |
1034 | cm_req_set_qp_type(req_msg, param->qp_type); | |
1035 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
1036 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
1037 | cm_req_set_local_resp_timeout(req_msg, | |
1038 | param->local_cm_response_timeout); | |
a977049d HR |
1039 | req_msg->pkey = param->primary_path->pkey; |
1040 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
a977049d | 1041 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); |
d26a360b SH |
1042 | |
1043 | if (param->qp_type != IB_QPT_XRC_INI) { | |
1044 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
1045 | cm_req_set_retry_count(req_msg, param->retry_count); | |
1046 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
1047 | cm_req_set_srq(req_msg, param->srq); | |
1048 | } | |
a977049d | 1049 | |
3971c9f6 SH |
1050 | if (pri_path->hop_limit <= 1) { |
1051 | req_msg->primary_local_lid = pri_path->slid; | |
1052 | req_msg->primary_remote_lid = pri_path->dlid; | |
1053 | } else { | |
1054 | /* Work-around until there's a way to obtain remote LID info */ | |
1055 | req_msg->primary_local_lid = IB_LID_PERMISSIVE; | |
1056 | req_msg->primary_remote_lid = IB_LID_PERMISSIVE; | |
1057 | } | |
1058 | req_msg->primary_local_gid = pri_path->sgid; | |
1059 | req_msg->primary_remote_gid = pri_path->dgid; | |
1060 | cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); | |
1061 | cm_req_set_primary_packet_rate(req_msg, pri_path->rate); | |
1062 | req_msg->primary_traffic_class = pri_path->traffic_class; | |
1063 | req_msg->primary_hop_limit = pri_path->hop_limit; | |
1064 | cm_req_set_primary_sl(req_msg, pri_path->sl); | |
1065 | cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); | |
a977049d | 1066 | cm_req_set_primary_local_ack_timeout(req_msg, |
1d846126 | 1067 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1068 | pri_path->packet_life_time)); |
a977049d | 1069 | |
3971c9f6 SH |
1070 | if (alt_path) { |
1071 | if (alt_path->hop_limit <= 1) { | |
1072 | req_msg->alt_local_lid = alt_path->slid; | |
1073 | req_msg->alt_remote_lid = alt_path->dlid; | |
1074 | } else { | |
1075 | req_msg->alt_local_lid = IB_LID_PERMISSIVE; | |
1076 | req_msg->alt_remote_lid = IB_LID_PERMISSIVE; | |
1077 | } | |
1078 | req_msg->alt_local_gid = alt_path->sgid; | |
1079 | req_msg->alt_remote_gid = alt_path->dgid; | |
a977049d | 1080 | cm_req_set_alt_flow_label(req_msg, |
3971c9f6 SH |
1081 | alt_path->flow_label); |
1082 | cm_req_set_alt_packet_rate(req_msg, alt_path->rate); | |
1083 | req_msg->alt_traffic_class = alt_path->traffic_class; | |
1084 | req_msg->alt_hop_limit = alt_path->hop_limit; | |
1085 | cm_req_set_alt_sl(req_msg, alt_path->sl); | |
1086 | cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); | |
a977049d | 1087 | cm_req_set_alt_local_ack_timeout(req_msg, |
1d846126 | 1088 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1089 | alt_path->packet_life_time)); |
a977049d HR |
1090 | } |
1091 | ||
1092 | if (param->private_data && param->private_data_len) | |
1093 | memcpy(req_msg->private_data, param->private_data, | |
1094 | param->private_data_len); | |
1095 | } | |
1096 | ||
858119e1 | 1097 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
1098 | { |
1099 | /* peer-to-peer not supported */ | |
1100 | if (param->peer_to_peer) | |
1101 | return -EINVAL; | |
1102 | ||
1103 | if (!param->primary_path) | |
1104 | return -EINVAL; | |
1105 | ||
d26a360b SH |
1106 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC && |
1107 | param->qp_type != IB_QPT_XRC_INI) | |
a977049d HR |
1108 | return -EINVAL; |
1109 | ||
1110 | if (param->private_data && | |
1111 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
1112 | return -EINVAL; | |
1113 | ||
1114 | if (param->alternate_path && | |
1115 | (param->alternate_path->pkey != param->primary_path->pkey || | |
1116 | param->alternate_path->mtu != param->primary_path->mtu)) | |
1117 | return -EINVAL; | |
1118 | ||
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
1123 | struct ib_cm_req_param *param) | |
1124 | { | |
1125 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1126 | struct cm_req_msg *req_msg; |
1127 | unsigned long flags; | |
1128 | int ret; | |
1129 | ||
1130 | ret = cm_validate_req_param(param); | |
1131 | if (ret) | |
1132 | return ret; | |
1133 | ||
1134 | /* Verify that we're not in timewait. */ | |
1135 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1136 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1137 | if (cm_id->state != IB_CM_IDLE) { | |
1138 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1139 | ret = -EINVAL; | |
1140 | goto out; | |
1141 | } | |
1142 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1143 | ||
1144 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1145 | id.local_id); | |
75df23e2 SH |
1146 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1147 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 1148 | goto out; |
75df23e2 | 1149 | } |
a977049d HR |
1150 | |
1151 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
1152 | if (ret) | |
1153 | goto error1; | |
1154 | if (param->alternate_path) { | |
1155 | ret = cm_init_av_by_path(param->alternate_path, | |
1156 | &cm_id_priv->alt_av); | |
1157 | if (ret) | |
1158 | goto error1; | |
1159 | } | |
1160 | cm_id->service_id = param->service_id; | |
9c3da099 | 1161 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
1162 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1163 | param->primary_path->packet_life_time) * 2 + | |
1164 | cm_convert_to_ms( | |
1165 | param->remote_cm_response_timeout); | |
1166 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1167 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1168 | cm_id_priv->responder_resources = param->responder_resources; | |
1169 | cm_id_priv->retry_count = param->retry_count; | |
1170 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1171 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1172 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1173 | |
1174 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1175 | if (ret) | |
1176 | goto error1; | |
1177 | ||
1178 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1179 | cm_format_req(req_msg, cm_id_priv, param); | |
1180 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1181 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1182 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1183 | ||
1184 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1185 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
a977049d HR |
1186 | |
1187 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1188 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1189 | if (ret) { |
1190 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1191 | goto error2; | |
1192 | } | |
1193 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1194 | cm_id->state = IB_CM_REQ_SENT; | |
1195 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1196 | return 0; | |
1197 | ||
1198 | error2: cm_free_msg(cm_id_priv->msg); | |
1199 | error1: kfree(cm_id_priv->timewait_info); | |
1200 | out: return ret; | |
1201 | } | |
1202 | EXPORT_SYMBOL(ib_send_cm_req); | |
1203 | ||
1204 | static int cm_issue_rej(struct cm_port *port, | |
1205 | struct ib_mad_recv_wc *mad_recv_wc, | |
1206 | enum ib_cm_rej_reason reason, | |
1207 | enum cm_msg_response msg_rejected, | |
1208 | void *ari, u8 ari_length) | |
1209 | { | |
1210 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1211 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1212 | int ret; | |
1213 | ||
1214 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1215 | if (ret) | |
1216 | return ret; | |
1217 | ||
1218 | /* We just need common CM header information. Cast to any message. */ | |
1219 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1220 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1221 | ||
1222 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1223 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1224 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1225 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1226 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1227 | |
1228 | if (ari && ari_length) { | |
1229 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1230 | memcpy(rej_msg->ari, ari, ari_length); | |
1231 | } | |
1232 | ||
34816ad9 | 1233 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1234 | if (ret) |
1235 | cm_free_msg(msg); | |
1236 | ||
1237 | return ret; | |
1238 | } | |
1239 | ||
97f52eb4 SH |
1240 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1241 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1242 | { |
1243 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1244 | ((local_ca_guid == remote_ca_guid) && | |
1245 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1246 | } | |
1247 | ||
858119e1 | 1248 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1249 | struct ib_sa_path_rec *primary_path, |
1250 | struct ib_sa_path_rec *alt_path) | |
1251 | { | |
1252 | memset(primary_path, 0, sizeof *primary_path); | |
1253 | primary_path->dgid = req_msg->primary_local_gid; | |
1254 | primary_path->sgid = req_msg->primary_remote_gid; | |
1255 | primary_path->dlid = req_msg->primary_local_lid; | |
1256 | primary_path->slid = req_msg->primary_remote_lid; | |
1257 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1258 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1259 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1260 | primary_path->reversible = 1; | |
1261 | primary_path->pkey = req_msg->pkey; | |
1262 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1263 | primary_path->mtu_selector = IB_SA_EQ; | |
1264 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1265 | primary_path->rate_selector = IB_SA_EQ; | |
1266 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1267 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1268 | primary_path->packet_life_time = | |
1269 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1270 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1271 | ||
1272 | if (req_msg->alt_local_lid) { | |
1273 | memset(alt_path, 0, sizeof *alt_path); | |
1274 | alt_path->dgid = req_msg->alt_local_gid; | |
1275 | alt_path->sgid = req_msg->alt_remote_gid; | |
1276 | alt_path->dlid = req_msg->alt_local_lid; | |
1277 | alt_path->slid = req_msg->alt_remote_lid; | |
1278 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1279 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1280 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1281 | alt_path->reversible = 1; | |
1282 | alt_path->pkey = req_msg->pkey; | |
1283 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1284 | alt_path->mtu_selector = IB_SA_EQ; | |
1285 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1286 | alt_path->rate_selector = IB_SA_EQ; | |
1287 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1288 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1289 | alt_path->packet_life_time = | |
1290 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1291 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | static void cm_format_req_event(struct cm_work *work, | |
1296 | struct cm_id_private *cm_id_priv, | |
1297 | struct ib_cm_id *listen_id) | |
1298 | { | |
1299 | struct cm_req_msg *req_msg; | |
1300 | struct ib_cm_req_event_param *param; | |
1301 | ||
1302 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1303 | param = &work->cm_event.param.req_rcvd; | |
1304 | param->listen_id = listen_id; | |
a977049d HR |
1305 | param->port = cm_id_priv->av.port->port_num; |
1306 | param->primary_path = &work->path[0]; | |
1307 | if (req_msg->alt_local_lid) | |
1308 | param->alternate_path = &work->path[1]; | |
1309 | else | |
1310 | param->alternate_path = NULL; | |
1311 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1312 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1313 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1314 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1315 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1316 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1317 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1318 | param->local_cm_response_timeout = | |
1319 | cm_req_get_remote_resp_timeout(req_msg); | |
1320 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1321 | param->remote_cm_response_timeout = | |
1322 | cm_req_get_local_resp_timeout(req_msg); | |
1323 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1324 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1325 | param->srq = cm_req_get_srq(req_msg); | |
1326 | work->cm_event.private_data = &req_msg->private_data; | |
1327 | } | |
1328 | ||
1329 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1330 | struct cm_work *work) | |
1331 | { | |
a977049d HR |
1332 | int ret; |
1333 | ||
1334 | /* We will typically only have the current event to report. */ | |
1335 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1336 | cm_free_work(work); | |
1337 | ||
1338 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1339 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1340 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1341 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1342 | BUG_ON(!work); |
1343 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1344 | &work->cm_event); | |
1345 | cm_free_work(work); | |
1346 | } | |
1347 | cm_deref_id(cm_id_priv); | |
1348 | if (ret) | |
04c33543 | 1349 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1350 | } |
1351 | ||
1352 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1353 | struct cm_id_private *cm_id_priv, | |
1354 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1355 | const void *private_data, u8 private_data_len) | |
1356 | { | |
1357 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1358 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1359 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1360 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1361 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1362 | ||
1363 | if (private_data && private_data_len) | |
1364 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1365 | } | |
1366 | ||
1367 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1368 | struct cm_id_private *cm_id_priv, | |
1369 | enum ib_cm_rej_reason reason, | |
1370 | void *ari, | |
1371 | u8 ari_length, | |
1372 | const void *private_data, | |
1373 | u8 private_data_len) | |
1374 | { | |
1375 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1376 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1377 | ||
1378 | switch(cm_id_priv->id.state) { | |
1379 | case IB_CM_REQ_RCVD: | |
1380 | rej_msg->local_comm_id = 0; | |
1381 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1382 | break; | |
1383 | case IB_CM_MRA_REQ_SENT: | |
1384 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1385 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1386 | break; | |
1387 | case IB_CM_REP_RCVD: | |
1388 | case IB_CM_MRA_REP_SENT: | |
1389 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1390 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1391 | break; | |
1392 | default: | |
1393 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1394 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1395 | break; | |
1396 | } | |
1397 | ||
97f52eb4 | 1398 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1399 | if (ari && ari_length) { |
1400 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1401 | memcpy(rej_msg->ari, ari, ari_length); | |
1402 | } | |
1403 | ||
1404 | if (private_data && private_data_len) | |
1405 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1406 | } | |
1407 | ||
1408 | static void cm_dup_req_handler(struct cm_work *work, | |
1409 | struct cm_id_private *cm_id_priv) | |
1410 | { | |
1411 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1412 | int ret; |
1413 | ||
9af57b7a SH |
1414 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1415 | counter[CM_REQ_COUNTER]); | |
1416 | ||
a977049d HR |
1417 | /* Quick state check to discard duplicate REQs. */ |
1418 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1419 | return; | |
1420 | ||
1421 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1422 | if (ret) | |
1423 | return; | |
1424 | ||
24be6e81 | 1425 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1426 | switch (cm_id_priv->id.state) { |
1427 | case IB_CM_MRA_REQ_SENT: | |
1428 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1429 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1430 | cm_id_priv->private_data, | |
1431 | cm_id_priv->private_data_len); | |
1432 | break; | |
1433 | case IB_CM_TIMEWAIT: | |
1434 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1435 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1436 | break; | |
1437 | default: | |
1438 | goto unlock; | |
1439 | } | |
24be6e81 | 1440 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1441 | |
34816ad9 | 1442 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1443 | if (ret) |
1444 | goto free; | |
1445 | return; | |
1446 | ||
24be6e81 | 1447 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1448 | free: cm_free_msg(msg); |
1449 | } | |
1450 | ||
1451 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1452 | struct cm_id_private *cm_id_priv) | |
1453 | { | |
1454 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1455 | struct cm_timewait_info *timewait_info; | |
1456 | struct cm_req_msg *req_msg; | |
a977049d HR |
1457 | |
1458 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1459 | ||
d998ccce | 1460 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1461 | spin_lock_irq(&cm.lock); |
a977049d | 1462 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d HR |
1463 | if (timewait_info) { |
1464 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1465 | timewait_info->work.remote_id); | |
24be6e81 | 1466 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1467 | if (cur_cm_id_priv) { |
1468 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1469 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1470 | } |
1471 | return NULL; | |
1472 | } | |
1473 | ||
1474 | /* Check for stale connections. */ | |
1475 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1476 | if (timewait_info) { | |
1477 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
24be6e81 | 1478 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1479 | cm_issue_rej(work->port, work->mad_recv_wc, |
1480 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1481 | NULL, 0); | |
1482 | return NULL; | |
a977049d HR |
1483 | } |
1484 | ||
1485 | /* Find matching listen request. */ | |
07d357d0 | 1486 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1487 | req_msg->service_id, |
1488 | req_msg->private_data); | |
a977049d | 1489 | if (!listen_cm_id_priv) { |
8575329d | 1490 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
24be6e81 | 1491 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1492 | cm_issue_rej(work->port, work->mad_recv_wc, |
1493 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1494 | NULL, 0); | |
8575329d | 1495 | goto out; |
a977049d HR |
1496 | } |
1497 | atomic_inc(&listen_cm_id_priv->refcount); | |
1498 | atomic_inc(&cm_id_priv->refcount); | |
1499 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1500 | atomic_inc(&cm_id_priv->work_count); | |
24be6e81 | 1501 | spin_unlock_irq(&cm.lock); |
8575329d | 1502 | out: |
a977049d | 1503 | return listen_cm_id_priv; |
a977049d HR |
1504 | } |
1505 | ||
3971c9f6 SH |
1506 | /* |
1507 | * Work-around for inter-subnet connections. If the LIDs are permissive, | |
1508 | * we need to override the LID/SL data in the REQ with the LID information | |
1509 | * in the work completion. | |
1510 | */ | |
1511 | static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) | |
1512 | { | |
1513 | if (!cm_req_get_primary_subnet_local(req_msg)) { | |
1514 | if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { | |
1515 | req_msg->primary_local_lid = cpu_to_be16(wc->slid); | |
1516 | cm_req_set_primary_sl(req_msg, wc->sl); | |
1517 | } | |
1518 | ||
1519 | if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) | |
1520 | req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1521 | } | |
1522 | ||
1523 | if (!cm_req_get_alt_subnet_local(req_msg)) { | |
1524 | if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { | |
1525 | req_msg->alt_local_lid = cpu_to_be16(wc->slid); | |
1526 | cm_req_set_alt_sl(req_msg, wc->sl); | |
1527 | } | |
1528 | ||
1529 | if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) | |
1530 | req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1531 | } | |
1532 | } | |
1533 | ||
a977049d HR |
1534 | static int cm_req_handler(struct cm_work *work) |
1535 | { | |
1536 | struct ib_cm_id *cm_id; | |
1537 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1538 | struct cm_req_msg *req_msg; | |
1539 | int ret; | |
1540 | ||
1541 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1542 | ||
d4c4196f | 1543 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
1544 | if (IS_ERR(cm_id)) |
1545 | return PTR_ERR(cm_id); | |
1546 | ||
1547 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1548 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1549 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1550 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1551 | &cm_id_priv->av); |
1552 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1553 | id.local_id); | |
1554 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1555 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1556 | goto destroy; |
a977049d HR |
1557 | } |
1558 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1559 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1560 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1561 | ||
1562 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1563 | if (!listen_cm_id_priv) { | |
1564 | ret = -EINVAL; | |
76842405 SH |
1565 | kfree(cm_id_priv->timewait_info); |
1566 | goto destroy; | |
a977049d HR |
1567 | } |
1568 | ||
1569 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1570 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1571 | cm_id_priv->id.service_id = req_msg->service_id; | |
9c3da099 | 1572 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d | 1573 | |
3971c9f6 | 1574 | cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
a977049d | 1575 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
dd5f03be MB |
1576 | |
1577 | memcpy(work->path[0].dmac, cm_id_priv->av.ah_attr.dmac, ETH_ALEN); | |
1578 | work->path[0].vlan_id = cm_id_priv->av.ah_attr.vlan_id; | |
a977049d | 1579 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); |
76842405 | 1580 | if (ret) { |
d4c4196f | 1581 | ib_get_cached_gid(work->port->cm_dev->ib_device, |
76842405 SH |
1582 | work->port->port_num, 0, &work->path[0].sgid); |
1583 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1584 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1585 | NULL, 0); | |
1586 | goto rejected; | |
1587 | } | |
a977049d HR |
1588 | if (req_msg->alt_local_lid) { |
1589 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1590 | if (ret) { |
1591 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1592 | &work->path[0].sgid, | |
1593 | sizeof work->path[0].sgid, NULL, 0); | |
1594 | goto rejected; | |
1595 | } | |
a977049d HR |
1596 | } |
1597 | cm_id_priv->tid = req_msg->hdr.tid; | |
1598 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1599 | cm_req_get_local_resp_timeout(req_msg)); | |
1600 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1601 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1602 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1603 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1604 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
e1444b5a | 1605 | cm_id_priv->pkey = req_msg->pkey; |
a977049d | 1606 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
a977049d HR |
1607 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
1608 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1609 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1610 | |
1611 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1612 | cm_process_work(cm_id_priv, work); | |
1613 | cm_deref_id(listen_cm_id_priv); | |
1614 | return 0; | |
1615 | ||
76842405 SH |
1616 | rejected: |
1617 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1618 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1619 | destroy: |
1620 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1621 | return ret; |
1622 | } | |
1623 | ||
1624 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1625 | struct cm_id_private *cm_id_priv, | |
1626 | struct ib_cm_rep_param *param) | |
1627 | { | |
1628 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1629 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1630 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
a977049d HR |
1631 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); |
1632 | rep_msg->resp_resources = param->responder_resources; | |
1d846126 SH |
1633 | cm_rep_set_target_ack_delay(rep_msg, |
1634 | cm_id_priv->av.port->cm_dev->ack_delay); | |
a977049d | 1635 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
a977049d | 1636 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); |
e971b8cd | 1637 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1638 | |
d26a360b SH |
1639 | if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) { |
1640 | rep_msg->initiator_depth = param->initiator_depth; | |
1641 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1642 | cm_rep_set_srq(rep_msg, param->srq); | |
ef700446 | 1643 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1644 | } else { |
1645 | cm_rep_set_srq(rep_msg, 1); | |
ef700446 | 1646 | cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1647 | } |
1648 | ||
a977049d HR |
1649 | if (param->private_data && param->private_data_len) |
1650 | memcpy(rep_msg->private_data, param->private_data, | |
1651 | param->private_data_len); | |
1652 | } | |
1653 | ||
1654 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1655 | struct ib_cm_rep_param *param) | |
1656 | { | |
1657 | struct cm_id_private *cm_id_priv; | |
1658 | struct ib_mad_send_buf *msg; | |
1659 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1660 | unsigned long flags; |
1661 | int ret; | |
1662 | ||
1663 | if (param->private_data && | |
1664 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1665 | return -EINVAL; | |
1666 | ||
1667 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1668 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1669 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1670 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1671 | ret = -EINVAL; | |
1672 | goto out; | |
1673 | } | |
1674 | ||
1675 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1676 | if (ret) | |
1677 | goto out; | |
1678 | ||
1679 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1680 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1681 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1682 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1683 | ||
34816ad9 | 1684 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1685 | if (ret) { |
1686 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1687 | cm_free_msg(msg); | |
1688 | return ret; | |
1689 | } | |
1690 | ||
1691 | cm_id->state = IB_CM_REP_SENT; | |
1692 | cm_id_priv->msg = msg; | |
1693 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1694 | cm_id_priv->responder_resources = param->responder_resources; | |
1695 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
ef700446 | 1696 | cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF); |
a977049d HR |
1697 | |
1698 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1699 | return ret; | |
1700 | } | |
1701 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1702 | ||
1703 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1704 | struct cm_id_private *cm_id_priv, | |
1705 | const void *private_data, | |
1706 | u8 private_data_len) | |
1707 | { | |
1708 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1709 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1710 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1711 | ||
1712 | if (private_data && private_data_len) | |
1713 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1714 | } | |
1715 | ||
1716 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1717 | const void *private_data, | |
1718 | u8 private_data_len) | |
1719 | { | |
1720 | struct cm_id_private *cm_id_priv; | |
1721 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1722 | unsigned long flags; |
1723 | void *data; | |
1724 | int ret; | |
1725 | ||
1726 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1727 | return -EINVAL; | |
1728 | ||
1729 | data = cm_copy_private_data(private_data, private_data_len); | |
1730 | if (IS_ERR(data)) | |
1731 | return PTR_ERR(data); | |
1732 | ||
1733 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1734 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1735 | if (cm_id->state != IB_CM_REP_RCVD && | |
1736 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1737 | ret = -EINVAL; | |
1738 | goto error; | |
1739 | } | |
1740 | ||
1741 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1742 | if (ret) | |
1743 | goto error; | |
1744 | ||
1745 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1746 | private_data, private_data_len); | |
1747 | ||
34816ad9 | 1748 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1749 | if (ret) { |
1750 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1751 | cm_free_msg(msg); | |
1752 | kfree(data); | |
1753 | return ret; | |
1754 | } | |
1755 | ||
1756 | cm_id->state = IB_CM_ESTABLISHED; | |
1757 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1758 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1759 | return 0; | |
1760 | ||
1761 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1762 | kfree(data); | |
1763 | return ret; | |
1764 | } | |
1765 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1766 | ||
ef700446 | 1767 | static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type) |
a977049d HR |
1768 | { |
1769 | struct cm_rep_msg *rep_msg; | |
1770 | struct ib_cm_rep_event_param *param; | |
1771 | ||
1772 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1773 | param = &work->cm_event.param.rep_rcvd; | |
1774 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1775 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
ef700446 | 1776 | param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type)); |
a977049d HR |
1777 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); |
1778 | param->responder_resources = rep_msg->initiator_depth; | |
1779 | param->initiator_depth = rep_msg->resp_resources; | |
1780 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1781 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1782 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1783 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1784 | param->srq = cm_rep_get_srq(rep_msg); | |
1785 | work->cm_event.private_data = &rep_msg->private_data; | |
1786 | } | |
1787 | ||
1788 | static void cm_dup_rep_handler(struct cm_work *work) | |
1789 | { | |
1790 | struct cm_id_private *cm_id_priv; | |
1791 | struct cm_rep_msg *rep_msg; | |
1792 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1793 | int ret; |
1794 | ||
1795 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1796 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1797 | rep_msg->local_comm_id); | |
1798 | if (!cm_id_priv) | |
1799 | return; | |
1800 | ||
9af57b7a SH |
1801 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1802 | counter[CM_REP_COUNTER]); | |
a977049d HR |
1803 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
1804 | if (ret) | |
1805 | goto deref; | |
1806 | ||
24be6e81 | 1807 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1808 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
1809 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1810 | cm_id_priv->private_data, | |
1811 | cm_id_priv->private_data_len); | |
1812 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1813 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1814 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1815 | cm_id_priv->private_data, | |
1816 | cm_id_priv->private_data_len); | |
1817 | else | |
1818 | goto unlock; | |
24be6e81 | 1819 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1820 | |
34816ad9 | 1821 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1822 | if (ret) |
1823 | goto free; | |
1824 | goto deref; | |
1825 | ||
24be6e81 | 1826 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1827 | free: cm_free_msg(msg); |
1828 | deref: cm_deref_id(cm_id_priv); | |
1829 | } | |
1830 | ||
1831 | static int cm_rep_handler(struct cm_work *work) | |
1832 | { | |
1833 | struct cm_id_private *cm_id_priv; | |
1834 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1835 | int ret; |
1836 | ||
1837 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1838 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1839 | if (!cm_id_priv) { | |
1840 | cm_dup_rep_handler(work); | |
1841 | return -EINVAL; | |
1842 | } | |
1843 | ||
ef700446 | 1844 | cm_format_rep_event(work, cm_id_priv->qp_type); |
87fd1a11 | 1845 | |
24be6e81 | 1846 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1847 | switch (cm_id_priv->id.state) { |
1848 | case IB_CM_REQ_SENT: | |
1849 | case IB_CM_MRA_REQ_RCVD: | |
1850 | break; | |
1851 | default: | |
24be6e81 | 1852 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1853 | ret = -EINVAL; |
1854 | goto error; | |
1855 | } | |
1856 | ||
a977049d HR |
1857 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1858 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
ef700446 | 1859 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d | 1860 | |
87fd1a11 | 1861 | spin_lock(&cm.lock); |
a977049d HR |
1862 | /* Check for duplicate REP. */ |
1863 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 1864 | spin_unlock(&cm.lock); |
24be6e81 | 1865 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1866 | ret = -EINVAL; |
1867 | goto error; | |
1868 | } | |
1869 | /* Check for a stale connection. */ | |
1870 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1871 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1872 | &cm.remote_id_table); | |
1873 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1874 | spin_unlock(&cm.lock); | |
24be6e81 | 1875 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1876 | cm_issue_rej(work->port, work->mad_recv_wc, |
1877 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1878 | NULL, 0); | |
1879 | ret = -EINVAL; | |
1880 | goto error; | |
1881 | } | |
87fd1a11 | 1882 | spin_unlock(&cm.lock); |
a977049d | 1883 | |
a977049d HR |
1884 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1885 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
ef700446 | 1886 | cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d HR |
1887 | cm_id_priv->initiator_depth = rep_msg->resp_resources; |
1888 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1889 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1890 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1d846126 SH |
1891 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
1892 | cm_id_priv->av.timeout = | |
1893 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1894 | cm_id_priv->av.timeout - 1); | |
1895 | cm_id_priv->alt_av.timeout = | |
1896 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1897 | cm_id_priv->alt_av.timeout - 1); | |
a977049d HR |
1898 | |
1899 | /* todo: handle peer_to_peer */ | |
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 | ||
87fd1a11 | 1913 | error: |
a977049d HR |
1914 | cm_deref_id(cm_id_priv); |
1915 | return ret; | |
1916 | } | |
1917 | ||
1918 | static int cm_establish_handler(struct cm_work *work) | |
1919 | { | |
1920 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1921 | int ret; |
1922 | ||
e1444b5a | 1923 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
1924 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
1925 | if (!cm_id_priv) | |
1926 | return -EINVAL; | |
1927 | ||
24be6e81 | 1928 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1929 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 1930 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1931 | goto out; |
1932 | } | |
1933 | ||
34816ad9 | 1934 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1935 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1936 | if (!ret) | |
1937 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1938 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1939 | |
1940 | if (ret) | |
1941 | cm_process_work(cm_id_priv, work); | |
1942 | else | |
1943 | cm_deref_id(cm_id_priv); | |
1944 | return 0; | |
1945 | out: | |
1946 | cm_deref_id(cm_id_priv); | |
1947 | return -EINVAL; | |
1948 | } | |
1949 | ||
1950 | static int cm_rtu_handler(struct cm_work *work) | |
1951 | { | |
1952 | struct cm_id_private *cm_id_priv; | |
1953 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
1954 | int ret; |
1955 | ||
1956 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1957 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1958 | rtu_msg->local_comm_id); | |
1959 | if (!cm_id_priv) | |
1960 | return -EINVAL; | |
1961 | ||
1962 | work->cm_event.private_data = &rtu_msg->private_data; | |
1963 | ||
24be6e81 | 1964 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1965 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
1966 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 1967 | spin_unlock_irq(&cm_id_priv->lock); |
9af57b7a SH |
1968 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1969 | counter[CM_RTU_COUNTER]); | |
a977049d HR |
1970 | goto out; |
1971 | } | |
1972 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1973 | ||
34816ad9 | 1974 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1975 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1976 | if (!ret) | |
1977 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1978 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1979 | |
1980 | if (ret) | |
1981 | cm_process_work(cm_id_priv, work); | |
1982 | else | |
1983 | cm_deref_id(cm_id_priv); | |
1984 | return 0; | |
1985 | out: | |
1986 | cm_deref_id(cm_id_priv); | |
1987 | return -EINVAL; | |
1988 | } | |
1989 | ||
1990 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1991 | struct cm_id_private *cm_id_priv, | |
1992 | const void *private_data, | |
1993 | u8 private_data_len) | |
1994 | { | |
1995 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1996 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1997 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1998 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1999 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
2000 | ||
2001 | if (private_data && private_data_len) | |
2002 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
2003 | } | |
2004 | ||
2005 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
2006 | const void *private_data, | |
2007 | u8 private_data_len) | |
2008 | { | |
2009 | struct cm_id_private *cm_id_priv; | |
2010 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2011 | unsigned long flags; |
2012 | int ret; | |
2013 | ||
2014 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
2015 | return -EINVAL; | |
2016 | ||
2017 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2018 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2019 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
2020 | ret = -EINVAL; | |
2021 | goto out; | |
2022 | } | |
2023 | ||
8d8ac865 SH |
2024 | if (cm_id->lap_state == IB_CM_LAP_SENT || |
2025 | cm_id->lap_state == IB_CM_MRA_LAP_RCVD) | |
2026 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2027 | ||
a977049d HR |
2028 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2029 | if (ret) { | |
2030 | cm_enter_timewait(cm_id_priv); | |
2031 | goto out; | |
2032 | } | |
2033 | ||
2034 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
2035 | private_data, private_data_len); | |
34816ad9 | 2036 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2037 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
2038 | ||
34816ad9 | 2039 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2040 | if (ret) { |
2041 | cm_enter_timewait(cm_id_priv); | |
2042 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2043 | cm_free_msg(msg); | |
2044 | return ret; | |
2045 | } | |
2046 | ||
2047 | cm_id->state = IB_CM_DREQ_SENT; | |
2048 | cm_id_priv->msg = msg; | |
2049 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2050 | return ret; | |
2051 | } | |
2052 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
2053 | ||
2054 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
2055 | struct cm_id_private *cm_id_priv, | |
2056 | const void *private_data, | |
2057 | u8 private_data_len) | |
2058 | { | |
2059 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
2060 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
2061 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2062 | ||
2063 | if (private_data && private_data_len) | |
2064 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
2065 | } | |
2066 | ||
2067 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
2068 | const void *private_data, | |
2069 | u8 private_data_len) | |
2070 | { | |
2071 | struct cm_id_private *cm_id_priv; | |
2072 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2073 | unsigned long flags; |
2074 | void *data; | |
2075 | int ret; | |
2076 | ||
2077 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
2078 | return -EINVAL; | |
2079 | ||
2080 | data = cm_copy_private_data(private_data, private_data_len); | |
2081 | if (IS_ERR(data)) | |
2082 | return PTR_ERR(data); | |
2083 | ||
2084 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2085 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2086 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
2087 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2088 | kfree(data); | |
2089 | return -EINVAL; | |
2090 | } | |
2091 | ||
2092 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2093 | cm_enter_timewait(cm_id_priv); | |
2094 | ||
2095 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2096 | if (ret) | |
2097 | goto out; | |
2098 | ||
2099 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2100 | private_data, private_data_len); | |
2101 | ||
34816ad9 | 2102 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2103 | if (ret) { |
2104 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2105 | cm_free_msg(msg); | |
2106 | return ret; | |
2107 | } | |
2108 | ||
2109 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2110 | return ret; | |
2111 | } | |
2112 | EXPORT_SYMBOL(ib_send_cm_drep); | |
2113 | ||
82a9c16a SH |
2114 | static int cm_issue_drep(struct cm_port *port, |
2115 | struct ib_mad_recv_wc *mad_recv_wc) | |
2116 | { | |
2117 | struct ib_mad_send_buf *msg = NULL; | |
2118 | struct cm_dreq_msg *dreq_msg; | |
2119 | struct cm_drep_msg *drep_msg; | |
2120 | int ret; | |
2121 | ||
2122 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
2123 | if (ret) | |
2124 | return ret; | |
2125 | ||
2126 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
2127 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
2128 | ||
2129 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
2130 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
2131 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
2132 | ||
2133 | ret = ib_post_send_mad(msg, NULL); | |
2134 | if (ret) | |
2135 | cm_free_msg(msg); | |
2136 | ||
2137 | return ret; | |
2138 | } | |
2139 | ||
a977049d HR |
2140 | static int cm_dreq_handler(struct cm_work *work) |
2141 | { | |
2142 | struct cm_id_private *cm_id_priv; | |
2143 | struct cm_dreq_msg *dreq_msg; | |
2144 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2145 | int ret; |
2146 | ||
2147 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
2148 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
2149 | dreq_msg->local_comm_id); | |
82a9c16a | 2150 | if (!cm_id_priv) { |
9af57b7a SH |
2151 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2152 | counter[CM_DREQ_COUNTER]); | |
82a9c16a | 2153 | cm_issue_drep(work->port, work->mad_recv_wc); |
a977049d | 2154 | return -EINVAL; |
82a9c16a | 2155 | } |
a977049d HR |
2156 | |
2157 | work->cm_event.private_data = &dreq_msg->private_data; | |
2158 | ||
24be6e81 | 2159 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2160 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
2161 | goto unlock; | |
2162 | ||
2163 | switch (cm_id_priv->id.state) { | |
2164 | case IB_CM_REP_SENT: | |
2165 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2166 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2167 | break; |
2168 | case IB_CM_ESTABLISHED: | |
8d8ac865 SH |
2169 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || |
2170 | cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2171 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2172 | break; | |
a977049d HR |
2173 | case IB_CM_MRA_REP_RCVD: |
2174 | break; | |
2175 | case IB_CM_TIMEWAIT: | |
9af57b7a SH |
2176 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2177 | counter[CM_DREQ_COUNTER]); | |
a977049d HR |
2178 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2179 | goto unlock; | |
2180 | ||
2181 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2182 | cm_id_priv->private_data, | |
2183 | cm_id_priv->private_data_len); | |
24be6e81 | 2184 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2185 | |
34816ad9 | 2186 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2187 | cm_free_msg(msg); |
2188 | goto deref; | |
9af57b7a SH |
2189 | case IB_CM_DREQ_RCVD: |
2190 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2191 | counter[CM_DREQ_COUNTER]); | |
2192 | goto unlock; | |
a977049d HR |
2193 | default: |
2194 | goto unlock; | |
2195 | } | |
2196 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
2197 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
2198 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2199 | if (!ret) | |
2200 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2201 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2202 | |
2203 | if (ret) | |
2204 | cm_process_work(cm_id_priv, work); | |
2205 | else | |
2206 | cm_deref_id(cm_id_priv); | |
2207 | return 0; | |
2208 | ||
24be6e81 | 2209 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2210 | deref: cm_deref_id(cm_id_priv); |
2211 | return -EINVAL; | |
2212 | } | |
2213 | ||
2214 | static int cm_drep_handler(struct cm_work *work) | |
2215 | { | |
2216 | struct cm_id_private *cm_id_priv; | |
2217 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2218 | int ret; |
2219 | ||
2220 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2221 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2222 | drep_msg->local_comm_id); | |
2223 | if (!cm_id_priv) | |
2224 | return -EINVAL; | |
2225 | ||
2226 | work->cm_event.private_data = &drep_msg->private_data; | |
2227 | ||
24be6e81 | 2228 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2229 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2230 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2231 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2232 | goto out; |
2233 | } | |
2234 | cm_enter_timewait(cm_id_priv); | |
2235 | ||
34816ad9 | 2236 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2237 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2238 | if (!ret) | |
2239 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2240 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2241 | |
2242 | if (ret) | |
2243 | cm_process_work(cm_id_priv, work); | |
2244 | else | |
2245 | cm_deref_id(cm_id_priv); | |
2246 | return 0; | |
2247 | out: | |
2248 | cm_deref_id(cm_id_priv); | |
2249 | return -EINVAL; | |
2250 | } | |
2251 | ||
2252 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2253 | enum ib_cm_rej_reason reason, | |
2254 | void *ari, | |
2255 | u8 ari_length, | |
2256 | const void *private_data, | |
2257 | u8 private_data_len) | |
2258 | { | |
2259 | struct cm_id_private *cm_id_priv; | |
2260 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2261 | unsigned long flags; |
2262 | int ret; | |
2263 | ||
2264 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2265 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2266 | return -EINVAL; | |
2267 | ||
2268 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2269 | ||
2270 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2271 | switch (cm_id->state) { | |
2272 | case IB_CM_REQ_SENT: | |
2273 | case IB_CM_MRA_REQ_RCVD: | |
2274 | case IB_CM_REQ_RCVD: | |
2275 | case IB_CM_MRA_REQ_SENT: | |
2276 | case IB_CM_REP_RCVD: | |
2277 | case IB_CM_MRA_REP_SENT: | |
2278 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2279 | if (!ret) | |
2280 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2281 | cm_id_priv, reason, ari, ari_length, | |
2282 | private_data, private_data_len); | |
2283 | ||
2284 | cm_reset_to_idle(cm_id_priv); | |
2285 | break; | |
2286 | case IB_CM_REP_SENT: | |
2287 | case IB_CM_MRA_REP_RCVD: | |
2288 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2289 | if (!ret) | |
2290 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2291 | cm_id_priv, reason, ari, ari_length, | |
2292 | private_data, private_data_len); | |
2293 | ||
2294 | cm_enter_timewait(cm_id_priv); | |
2295 | break; | |
2296 | default: | |
2297 | ret = -EINVAL; | |
2298 | goto out; | |
2299 | } | |
2300 | ||
2301 | if (ret) | |
2302 | goto out; | |
2303 | ||
34816ad9 | 2304 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2305 | if (ret) |
2306 | cm_free_msg(msg); | |
2307 | ||
2308 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2309 | return ret; | |
2310 | } | |
2311 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2312 | ||
2313 | static void cm_format_rej_event(struct cm_work *work) | |
2314 | { | |
2315 | struct cm_rej_msg *rej_msg; | |
2316 | struct ib_cm_rej_event_param *param; | |
2317 | ||
2318 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2319 | param = &work->cm_event.param.rej_rcvd; | |
2320 | param->ari = rej_msg->ari; | |
2321 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2322 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2323 | work->cm_event.private_data = &rej_msg->private_data; |
2324 | } | |
2325 | ||
2326 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2327 | { | |
2328 | struct cm_timewait_info *timewait_info; | |
2329 | struct cm_id_private *cm_id_priv; | |
97f52eb4 | 2330 | __be32 remote_id; |
a977049d HR |
2331 | |
2332 | remote_id = rej_msg->local_comm_id; | |
2333 | ||
97f52eb4 | 2334 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
24be6e81 | 2335 | spin_lock_irq(&cm.lock); |
97f52eb4 | 2336 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2337 | remote_id); |
2338 | if (!timewait_info) { | |
24be6e81 | 2339 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2340 | return NULL; |
2341 | } | |
f06d2653 SH |
2342 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2343 | (timewait_info->work.local_id ^ | |
2344 | cm.random_id_operand)); | |
a977049d HR |
2345 | if (cm_id_priv) { |
2346 | if (cm_id_priv->id.remote_id == remote_id) | |
2347 | atomic_inc(&cm_id_priv->refcount); | |
2348 | else | |
2349 | cm_id_priv = NULL; | |
2350 | } | |
24be6e81 | 2351 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2352 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
2353 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2354 | else | |
2355 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2356 | ||
2357 | return cm_id_priv; | |
2358 | } | |
2359 | ||
2360 | static int cm_rej_handler(struct cm_work *work) | |
2361 | { | |
2362 | struct cm_id_private *cm_id_priv; | |
2363 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
2364 | int ret; |
2365 | ||
2366 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2367 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2368 | if (!cm_id_priv) | |
2369 | return -EINVAL; | |
2370 | ||
2371 | cm_format_rej_event(work); | |
2372 | ||
24be6e81 | 2373 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2374 | switch (cm_id_priv->id.state) { |
2375 | case IB_CM_REQ_SENT: | |
2376 | case IB_CM_MRA_REQ_RCVD: | |
2377 | case IB_CM_REP_SENT: | |
2378 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2379 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2380 | /* fall through */ |
2381 | case IB_CM_REQ_RCVD: | |
2382 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2383 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2384 | cm_enter_timewait(cm_id_priv); |
2385 | else | |
2386 | cm_reset_to_idle(cm_id_priv); | |
2387 | break; | |
2388 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2389 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2390 | /* fall through */ |
2391 | case IB_CM_REP_RCVD: | |
2392 | case IB_CM_MRA_REP_SENT: | |
a977049d HR |
2393 | cm_enter_timewait(cm_id_priv); |
2394 | break; | |
8d8ac865 SH |
2395 | case IB_CM_ESTABLISHED: |
2396 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT || | |
2397 | cm_id_priv->id.lap_state == IB_CM_LAP_SENT) { | |
2398 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT) | |
2399 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2400 | cm_id_priv->msg); | |
2401 | cm_enter_timewait(cm_id_priv); | |
2402 | break; | |
2403 | } | |
2404 | /* fall through */ | |
a977049d | 2405 | default: |
24be6e81 | 2406 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2407 | ret = -EINVAL; |
2408 | goto out; | |
2409 | } | |
2410 | ||
2411 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2412 | if (!ret) | |
2413 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2414 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2415 | |
2416 | if (ret) | |
2417 | cm_process_work(cm_id_priv, work); | |
2418 | else | |
2419 | cm_deref_id(cm_id_priv); | |
2420 | return 0; | |
2421 | out: | |
2422 | cm_deref_id(cm_id_priv); | |
2423 | return -EINVAL; | |
2424 | } | |
2425 | ||
2426 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2427 | u8 service_timeout, | |
2428 | const void *private_data, | |
2429 | u8 private_data_len) | |
2430 | { | |
2431 | struct cm_id_private *cm_id_priv; | |
2432 | struct ib_mad_send_buf *msg; | |
de98b693 SH |
2433 | enum ib_cm_state cm_state; |
2434 | enum ib_cm_lap_state lap_state; | |
2435 | enum cm_msg_response msg_response; | |
a977049d HR |
2436 | void *data; |
2437 | unsigned long flags; | |
2438 | int ret; | |
2439 | ||
2440 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2441 | return -EINVAL; | |
2442 | ||
2443 | data = cm_copy_private_data(private_data, private_data_len); | |
2444 | if (IS_ERR(data)) | |
2445 | return PTR_ERR(data); | |
2446 | ||
2447 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2448 | ||
2449 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2450 | switch(cm_id_priv->id.state) { | |
2451 | case IB_CM_REQ_RCVD: | |
de98b693 SH |
2452 | cm_state = IB_CM_MRA_REQ_SENT; |
2453 | lap_state = cm_id->lap_state; | |
2454 | msg_response = CM_MSG_RESPONSE_REQ; | |
a977049d HR |
2455 | break; |
2456 | case IB_CM_REP_RCVD: | |
de98b693 SH |
2457 | cm_state = IB_CM_MRA_REP_SENT; |
2458 | lap_state = cm_id->lap_state; | |
2459 | msg_response = CM_MSG_RESPONSE_REP; | |
a977049d HR |
2460 | break; |
2461 | case IB_CM_ESTABLISHED: | |
50a025c6 SH |
2462 | if (cm_id->lap_state == IB_CM_LAP_RCVD) { |
2463 | cm_state = cm_id->state; | |
2464 | lap_state = IB_CM_MRA_LAP_SENT; | |
2465 | msg_response = CM_MSG_RESPONSE_OTHER; | |
2466 | break; | |
2467 | } | |
de98b693 SH |
2468 | default: |
2469 | ret = -EINVAL; | |
2470 | goto error1; | |
2471 | } | |
2472 | ||
2473 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { | |
a977049d HR |
2474 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2475 | if (ret) | |
2476 | goto error1; | |
2477 | ||
2478 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
de98b693 | 2479 | msg_response, service_timeout, |
a977049d | 2480 | private_data, private_data_len); |
34816ad9 | 2481 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2482 | if (ret) |
2483 | goto error2; | |
a977049d | 2484 | } |
de98b693 SH |
2485 | |
2486 | cm_id->state = cm_state; | |
2487 | cm_id->lap_state = lap_state; | |
a977049d HR |
2488 | cm_id_priv->service_timeout = service_timeout; |
2489 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2490 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2491 | return 0; | |
2492 | ||
2493 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2494 | kfree(data); | |
2495 | return ret; | |
2496 | ||
2497 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2498 | kfree(data); | |
2499 | cm_free_msg(msg); | |
2500 | return ret; | |
2501 | } | |
2502 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2503 | ||
2504 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2505 | { | |
2506 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2507 | case CM_MSG_RESPONSE_REQ: | |
2508 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2509 | case CM_MSG_RESPONSE_REP: | |
2510 | case CM_MSG_RESPONSE_OTHER: | |
2511 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2512 | mra_msg->local_comm_id); | |
2513 | default: | |
2514 | return NULL; | |
2515 | } | |
2516 | } | |
2517 | ||
2518 | static int cm_mra_handler(struct cm_work *work) | |
2519 | { | |
2520 | struct cm_id_private *cm_id_priv; | |
2521 | struct cm_mra_msg *mra_msg; | |
a977049d HR |
2522 | int timeout, ret; |
2523 | ||
2524 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2525 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2526 | if (!cm_id_priv) | |
2527 | return -EINVAL; | |
2528 | ||
2529 | work->cm_event.private_data = &mra_msg->private_data; | |
2530 | work->cm_event.param.mra_rcvd.service_timeout = | |
2531 | cm_mra_get_service_timeout(mra_msg); | |
2532 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
1d846126 | 2533 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 2534 | |
24be6e81 | 2535 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2536 | switch (cm_id_priv->id.state) { |
2537 | case IB_CM_REQ_SENT: | |
2538 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2539 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2540 | cm_id_priv->msg, timeout)) |
a977049d HR |
2541 | goto out; |
2542 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2543 | break; | |
2544 | case IB_CM_REP_SENT: | |
2545 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2546 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2547 | cm_id_priv->msg, timeout)) |
a977049d HR |
2548 | goto out; |
2549 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2550 | break; | |
2551 | case IB_CM_ESTABLISHED: | |
2552 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2553 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2554 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
9af57b7a SH |
2555 | cm_id_priv->msg, timeout)) { |
2556 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2557 | atomic_long_inc(&work->port-> | |
2558 | counter_group[CM_RECV_DUPLICATES]. | |
2559 | counter[CM_MRA_COUNTER]); | |
a977049d | 2560 | goto out; |
9af57b7a | 2561 | } |
a977049d HR |
2562 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
2563 | break; | |
9af57b7a SH |
2564 | case IB_CM_MRA_REQ_RCVD: |
2565 | case IB_CM_MRA_REP_RCVD: | |
2566 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2567 | counter[CM_MRA_COUNTER]); | |
2568 | /* fall through */ | |
a977049d HR |
2569 | default: |
2570 | goto out; | |
2571 | } | |
2572 | ||
2573 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2574 | cm_id_priv->id.state; | |
2575 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2576 | if (!ret) | |
2577 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2578 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2579 | |
2580 | if (ret) | |
2581 | cm_process_work(cm_id_priv, work); | |
2582 | else | |
2583 | cm_deref_id(cm_id_priv); | |
2584 | return 0; | |
2585 | out: | |
24be6e81 | 2586 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2587 | cm_deref_id(cm_id_priv); |
2588 | return -EINVAL; | |
2589 | } | |
2590 | ||
2591 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2592 | struct cm_id_private *cm_id_priv, | |
2593 | struct ib_sa_path_rec *alternate_path, | |
2594 | const void *private_data, | |
2595 | u8 private_data_len) | |
2596 | { | |
2597 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2598 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2599 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2600 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2601 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2602 | /* todo: need remote CM response timeout */ | |
2603 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2604 | lap_msg->alt_local_lid = alternate_path->slid; | |
2605 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2606 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2607 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2608 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2609 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2610 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2611 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2612 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2613 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2614 | cm_lap_set_local_ack_timeout(lap_msg, | |
1d846126 SH |
2615 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
2616 | alternate_path->packet_life_time)); | |
a977049d HR |
2617 | |
2618 | if (private_data && private_data_len) | |
2619 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2620 | } | |
2621 | ||
2622 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2623 | struct ib_sa_path_rec *alternate_path, | |
2624 | const void *private_data, | |
2625 | u8 private_data_len) | |
2626 | { | |
2627 | struct cm_id_private *cm_id_priv; | |
2628 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2629 | unsigned long flags; |
2630 | int ret; | |
2631 | ||
2632 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2633 | return -EINVAL; | |
2634 | ||
2635 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2636 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2637 | if (cm_id->state != IB_CM_ESTABLISHED || | |
e1444b5a SH |
2638 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
2639 | cm_id->lap_state != IB_CM_LAP_IDLE)) { | |
a977049d HR |
2640 | ret = -EINVAL; |
2641 | goto out; | |
2642 | } | |
2643 | ||
e1444b5a SH |
2644 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
2645 | if (ret) | |
2646 | goto out; | |
1d846126 SH |
2647 | cm_id_priv->alt_av.timeout = |
2648 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2649 | cm_id_priv->alt_av.timeout - 1); | |
e1444b5a | 2650 | |
a977049d HR |
2651 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2652 | if (ret) | |
2653 | goto out; | |
2654 | ||
2655 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2656 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2657 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2658 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2659 | ||
34816ad9 | 2660 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2661 | if (ret) { |
2662 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2663 | cm_free_msg(msg); | |
2664 | return ret; | |
2665 | } | |
2666 | ||
2667 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2668 | cm_id_priv->msg = msg; | |
2669 | ||
2670 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2671 | return ret; | |
2672 | } | |
2673 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2674 | ||
e1444b5a SH |
2675 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
2676 | struct ib_sa_path_rec *path, | |
a977049d HR |
2677 | struct cm_lap_msg *lap_msg) |
2678 | { | |
2679 | memset(path, 0, sizeof *path); | |
2680 | path->dgid = lap_msg->alt_local_gid; | |
2681 | path->sgid = lap_msg->alt_remote_gid; | |
2682 | path->dlid = lap_msg->alt_local_lid; | |
2683 | path->slid = lap_msg->alt_remote_lid; | |
2684 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2685 | path->hop_limit = lap_msg->alt_hop_limit; | |
2686 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2687 | path->reversible = 1; | |
e1444b5a | 2688 | path->pkey = cm_id_priv->pkey; |
a977049d HR |
2689 | path->sl = cm_lap_get_sl(lap_msg); |
2690 | path->mtu_selector = IB_SA_EQ; | |
e1444b5a | 2691 | path->mtu = cm_id_priv->path_mtu; |
a977049d HR |
2692 | path->rate_selector = IB_SA_EQ; |
2693 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2694 | path->packet_life_time_selector = IB_SA_EQ; | |
2695 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2696 | path->packet_life_time -= (path->packet_life_time > 0); | |
2697 | } | |
2698 | ||
2699 | static int cm_lap_handler(struct cm_work *work) | |
2700 | { | |
2701 | struct cm_id_private *cm_id_priv; | |
2702 | struct cm_lap_msg *lap_msg; | |
2703 | struct ib_cm_lap_event_param *param; | |
2704 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2705 | int ret; |
2706 | ||
2707 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2708 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2709 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2710 | lap_msg->local_comm_id); | |
2711 | if (!cm_id_priv) | |
2712 | return -EINVAL; | |
2713 | ||
2714 | param = &work->cm_event.param.lap_rcvd; | |
2715 | param->alternate_path = &work->path[0]; | |
e1444b5a | 2716 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
a977049d HR |
2717 | work->cm_event.private_data = &lap_msg->private_data; |
2718 | ||
24be6e81 | 2719 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2720 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
2721 | goto unlock; | |
2722 | ||
2723 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 2724 | case IB_CM_LAP_UNINIT: |
a977049d HR |
2725 | case IB_CM_LAP_IDLE: |
2726 | break; | |
2727 | case IB_CM_MRA_LAP_SENT: | |
9af57b7a SH |
2728 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2729 | counter[CM_LAP_COUNTER]); | |
a977049d HR |
2730 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2731 | goto unlock; | |
2732 | ||
2733 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2734 | CM_MSG_RESPONSE_OTHER, | |
2735 | cm_id_priv->service_timeout, | |
2736 | cm_id_priv->private_data, | |
2737 | cm_id_priv->private_data_len); | |
24be6e81 | 2738 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2739 | |
34816ad9 | 2740 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2741 | cm_free_msg(msg); |
2742 | goto deref; | |
9af57b7a SH |
2743 | case IB_CM_LAP_RCVD: |
2744 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2745 | counter[CM_LAP_COUNTER]); | |
2746 | goto unlock; | |
a977049d HR |
2747 | default: |
2748 | goto unlock; | |
2749 | } | |
2750 | ||
2751 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2752 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e1444b5a SH |
2753 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2754 | work->mad_recv_wc->recv_buf.grh, | |
2755 | &cm_id_priv->av); | |
2756 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); | |
a977049d HR |
2757 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2758 | if (!ret) | |
2759 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2760 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2761 | |
2762 | if (ret) | |
2763 | cm_process_work(cm_id_priv, work); | |
2764 | else | |
2765 | cm_deref_id(cm_id_priv); | |
2766 | return 0; | |
2767 | ||
24be6e81 | 2768 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2769 | deref: cm_deref_id(cm_id_priv); |
2770 | return -EINVAL; | |
2771 | } | |
2772 | ||
2773 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2774 | struct cm_id_private *cm_id_priv, | |
2775 | enum ib_cm_apr_status status, | |
2776 | void *info, | |
2777 | u8 info_length, | |
2778 | const void *private_data, | |
2779 | u8 private_data_len) | |
2780 | { | |
2781 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2782 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2783 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2784 | apr_msg->ap_status = (u8) status; | |
2785 | ||
2786 | if (info && info_length) { | |
2787 | apr_msg->info_length = info_length; | |
2788 | memcpy(apr_msg->info, info, info_length); | |
2789 | } | |
2790 | ||
2791 | if (private_data && private_data_len) | |
2792 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2793 | } | |
2794 | ||
2795 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2796 | enum ib_cm_apr_status status, | |
2797 | void *info, | |
2798 | u8 info_length, | |
2799 | const void *private_data, | |
2800 | u8 private_data_len) | |
2801 | { | |
2802 | struct cm_id_private *cm_id_priv; | |
2803 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2804 | unsigned long flags; |
2805 | int ret; | |
2806 | ||
2807 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2808 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2809 | return -EINVAL; | |
2810 | ||
2811 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2812 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2813 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2814 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2815 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2816 | ret = -EINVAL; | |
2817 | goto out; | |
2818 | } | |
2819 | ||
2820 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2821 | if (ret) | |
2822 | goto out; | |
2823 | ||
2824 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2825 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2826 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2827 | if (ret) { |
2828 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2829 | cm_free_msg(msg); | |
2830 | return ret; | |
2831 | } | |
2832 | ||
2833 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2834 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2835 | return ret; | |
2836 | } | |
2837 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2838 | ||
2839 | static int cm_apr_handler(struct cm_work *work) | |
2840 | { | |
2841 | struct cm_id_private *cm_id_priv; | |
2842 | struct cm_apr_msg *apr_msg; | |
a977049d HR |
2843 | int ret; |
2844 | ||
2845 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2846 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2847 | apr_msg->local_comm_id); | |
2848 | if (!cm_id_priv) | |
2849 | return -EINVAL; /* Unmatched reply. */ | |
2850 | ||
2851 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2852 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2853 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2854 | work->cm_event.private_data = &apr_msg->private_data; | |
2855 | ||
24be6e81 | 2856 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2857 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
2858 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2859 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 2860 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2861 | goto out; |
2862 | } | |
2863 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2864 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2865 | cm_id_priv->msg = NULL; |
2866 | ||
2867 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2868 | if (!ret) | |
2869 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2870 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2871 | |
2872 | if (ret) | |
2873 | cm_process_work(cm_id_priv, work); | |
2874 | else | |
2875 | cm_deref_id(cm_id_priv); | |
2876 | return 0; | |
2877 | out: | |
2878 | cm_deref_id(cm_id_priv); | |
2879 | return -EINVAL; | |
2880 | } | |
2881 | ||
2882 | static int cm_timewait_handler(struct cm_work *work) | |
2883 | { | |
2884 | struct cm_timewait_info *timewait_info; | |
2885 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2886 | int ret; |
2887 | ||
2888 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2889 | spin_lock_irq(&cm.lock); |
2890 | list_del(&timewait_info->list); | |
2891 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2892 | |
2893 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2894 | timewait_info->work.remote_id); | |
2895 | if (!cm_id_priv) | |
2896 | return -EINVAL; | |
2897 | ||
8575329d | 2898 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2899 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2900 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2901 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2902 | goto out; |
2903 | } | |
2904 | cm_id_priv->id.state = IB_CM_IDLE; | |
2905 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2906 | if (!ret) | |
2907 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2908 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2909 | |
2910 | if (ret) | |
2911 | cm_process_work(cm_id_priv, work); | |
2912 | else | |
2913 | cm_deref_id(cm_id_priv); | |
2914 | return 0; | |
2915 | out: | |
2916 | cm_deref_id(cm_id_priv); | |
2917 | return -EINVAL; | |
2918 | } | |
2919 | ||
2920 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2921 | struct cm_id_private *cm_id_priv, | |
2922 | struct ib_cm_sidr_req_param *param) | |
2923 | { | |
2924 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2925 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2926 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
a88f4888 | 2927 | sidr_req_msg->pkey = param->path->pkey; |
a977049d HR |
2928 | sidr_req_msg->service_id = param->service_id; |
2929 | ||
2930 | if (param->private_data && param->private_data_len) | |
2931 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2932 | param->private_data_len); | |
2933 | } | |
2934 | ||
2935 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2936 | struct ib_cm_sidr_req_param *param) | |
2937 | { | |
2938 | struct cm_id_private *cm_id_priv; | |
2939 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2940 | unsigned long flags; |
2941 | int ret; | |
2942 | ||
2943 | if (!param->path || (param->private_data && | |
2944 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2945 | return -EINVAL; | |
2946 | ||
2947 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2948 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2949 | if (ret) | |
2950 | goto out; | |
2951 | ||
2952 | cm_id->service_id = param->service_id; | |
9c3da099 | 2953 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
2954 | cm_id_priv->timeout_ms = param->timeout_ms; |
2955 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2956 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2957 | if (ret) | |
2958 | goto out; | |
2959 | ||
2960 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2961 | param); | |
34816ad9 | 2962 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2963 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2964 | ||
2965 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2966 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2967 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2968 | else |
2969 | ret = -EINVAL; | |
2970 | ||
2971 | if (ret) { | |
2972 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2973 | cm_free_msg(msg); | |
2974 | goto out; | |
2975 | } | |
2976 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2977 | cm_id_priv->msg = msg; | |
2978 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2979 | out: | |
2980 | return ret; | |
2981 | } | |
2982 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2983 | ||
2984 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2985 | struct ib_cm_id *listen_id) | |
2986 | { | |
2987 | struct cm_sidr_req_msg *sidr_req_msg; | |
2988 | struct ib_cm_sidr_req_event_param *param; | |
2989 | ||
2990 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2991 | work->mad_recv_wc->recv_buf.mad; | |
2992 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2993 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2994 | param->listen_id = listen_id; |
a977049d HR |
2995 | param->port = work->port->port_num; |
2996 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2997 | } | |
2998 | ||
2999 | static int cm_sidr_req_handler(struct cm_work *work) | |
3000 | { | |
3001 | struct ib_cm_id *cm_id; | |
3002 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
3003 | struct cm_sidr_req_msg *sidr_req_msg; | |
3004 | struct ib_wc *wc; | |
a977049d | 3005 | |
d4c4196f | 3006 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
3007 | if (IS_ERR(cm_id)) |
3008 | return PTR_ERR(cm_id); | |
3009 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3010 | ||
3011 | /* Record SGID/SLID and request ID for lookup. */ | |
3012 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
3013 | work->mad_recv_wc->recv_buf.mad; | |
3014 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 3015 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
3016 | cm_id_priv->av.dgid.global.interface_id = 0; |
3017 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 3018 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
3019 | &cm_id_priv->av); |
3020 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
a977049d HR |
3021 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
3022 | atomic_inc(&cm_id_priv->work_count); | |
3023 | ||
24be6e81 | 3024 | spin_lock_irq(&cm.lock); |
a977049d HR |
3025 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
3026 | if (cur_cm_id_priv) { | |
24be6e81 | 3027 | spin_unlock_irq(&cm.lock); |
9af57b7a SH |
3028 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
3029 | counter[CM_SIDR_REQ_COUNTER]); | |
a977049d HR |
3030 | goto out; /* Duplicate message. */ |
3031 | } | |
29c2731c | 3032 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
07d357d0 | 3033 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
3034 | sidr_req_msg->service_id, |
3035 | sidr_req_msg->private_data); | |
a977049d | 3036 | if (!cur_cm_id_priv) { |
24be6e81 | 3037 | spin_unlock_irq(&cm.lock); |
6164c8cd | 3038 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
a977049d HR |
3039 | goto out; /* No match. */ |
3040 | } | |
3041 | atomic_inc(&cur_cm_id_priv->refcount); | |
29963437 | 3042 | atomic_inc(&cm_id_priv->refcount); |
24be6e81 | 3043 | spin_unlock_irq(&cm.lock); |
a977049d HR |
3044 | |
3045 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
3046 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
3047 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
9c3da099 | 3048 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d HR |
3049 | |
3050 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
3051 | cm_process_work(cm_id_priv, work); | |
3052 | cm_deref_id(cur_cm_id_priv); | |
3053 | return 0; | |
3054 | out: | |
3055 | ib_destroy_cm_id(&cm_id_priv->id); | |
3056 | return -EINVAL; | |
3057 | } | |
3058 | ||
3059 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
3060 | struct cm_id_private *cm_id_priv, | |
3061 | struct ib_cm_sidr_rep_param *param) | |
3062 | { | |
3063 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
3064 | cm_id_priv->tid); | |
3065 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
3066 | sidr_rep_msg->status = param->status; | |
3067 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
3068 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
3069 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
3070 | ||
3071 | if (param->info && param->info_length) | |
3072 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
3073 | ||
3074 | if (param->private_data && param->private_data_len) | |
3075 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
3076 | param->private_data_len); | |
3077 | } | |
3078 | ||
3079 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
3080 | struct ib_cm_sidr_rep_param *param) | |
3081 | { | |
3082 | struct cm_id_private *cm_id_priv; | |
3083 | struct ib_mad_send_buf *msg; | |
a977049d HR |
3084 | unsigned long flags; |
3085 | int ret; | |
3086 | ||
3087 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
3088 | (param->private_data && | |
3089 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
3090 | return -EINVAL; | |
3091 | ||
3092 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3093 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3094 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
3095 | ret = -EINVAL; | |
3096 | goto error; | |
3097 | } | |
3098 | ||
3099 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
3100 | if (ret) | |
3101 | goto error; | |
3102 | ||
3103 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
3104 | param); | |
34816ad9 | 3105 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
3106 | if (ret) { |
3107 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3108 | cm_free_msg(msg); | |
3109 | return ret; | |
3110 | } | |
3111 | cm_id->state = IB_CM_IDLE; | |
3112 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3113 | ||
3114 | spin_lock_irqsave(&cm.lock, flags); | |
3115 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
3116 | spin_unlock_irqrestore(&cm.lock, flags); | |
3117 | return 0; | |
3118 | ||
3119 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3120 | return ret; | |
3121 | } | |
3122 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
3123 | ||
3124 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
3125 | { | |
3126 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3127 | struct ib_cm_sidr_rep_event_param *param; | |
3128 | ||
3129 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3130 | work->mad_recv_wc->recv_buf.mad; | |
3131 | param = &work->cm_event.param.sidr_rep_rcvd; | |
3132 | param->status = sidr_rep_msg->status; | |
3133 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
3134 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
3135 | param->info = &sidr_rep_msg->info; | |
3136 | param->info_len = sidr_rep_msg->info_length; | |
3137 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
3138 | } | |
3139 | ||
3140 | static int cm_sidr_rep_handler(struct cm_work *work) | |
3141 | { | |
3142 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3143 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
3144 | |
3145 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3146 | work->mad_recv_wc->recv_buf.mad; | |
3147 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
3148 | if (!cm_id_priv) | |
3149 | return -EINVAL; /* Unmatched reply. */ | |
3150 | ||
24be6e81 | 3151 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 3152 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 3153 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3154 | goto out; |
3155 | } | |
3156 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 3157 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 3158 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3159 | |
3160 | cm_format_sidr_rep_event(work); | |
3161 | cm_process_work(cm_id_priv, work); | |
3162 | return 0; | |
3163 | out: | |
3164 | cm_deref_id(cm_id_priv); | |
3165 | return -EINVAL; | |
3166 | } | |
3167 | ||
3168 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
3169 | enum ib_wc_status wc_status) | |
3170 | { | |
3171 | struct cm_id_private *cm_id_priv; | |
3172 | struct ib_cm_event cm_event; | |
3173 | enum ib_cm_state state; | |
a977049d HR |
3174 | int ret; |
3175 | ||
3176 | memset(&cm_event, 0, sizeof cm_event); | |
3177 | cm_id_priv = msg->context[0]; | |
3178 | ||
3179 | /* Discard old sends or ones without a response. */ | |
24be6e81 | 3180 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3181 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
3182 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
3183 | goto discard; | |
3184 | ||
3185 | switch (state) { | |
3186 | case IB_CM_REQ_SENT: | |
3187 | case IB_CM_MRA_REQ_RCVD: | |
3188 | cm_reset_to_idle(cm_id_priv); | |
3189 | cm_event.event = IB_CM_REQ_ERROR; | |
3190 | break; | |
3191 | case IB_CM_REP_SENT: | |
3192 | case IB_CM_MRA_REP_RCVD: | |
3193 | cm_reset_to_idle(cm_id_priv); | |
3194 | cm_event.event = IB_CM_REP_ERROR; | |
3195 | break; | |
3196 | case IB_CM_DREQ_SENT: | |
3197 | cm_enter_timewait(cm_id_priv); | |
3198 | cm_event.event = IB_CM_DREQ_ERROR; | |
3199 | break; | |
3200 | case IB_CM_SIDR_REQ_SENT: | |
3201 | cm_id_priv->id.state = IB_CM_IDLE; | |
3202 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
3203 | break; | |
3204 | default: | |
3205 | goto discard; | |
3206 | } | |
24be6e81 | 3207 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3208 | cm_event.param.send_status = wc_status; |
3209 | ||
3210 | /* No other events can occur on the cm_id at this point. */ | |
3211 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
3212 | cm_free_msg(msg); | |
3213 | if (ret) | |
3214 | ib_destroy_cm_id(&cm_id_priv->id); | |
3215 | return; | |
3216 | discard: | |
24be6e81 | 3217 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3218 | cm_free_msg(msg); |
3219 | } | |
3220 | ||
3221 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
3222 | struct ib_mad_send_wc *mad_send_wc) | |
3223 | { | |
34816ad9 | 3224 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
9af57b7a SH |
3225 | struct cm_port *port; |
3226 | u16 attr_index; | |
3227 | ||
3228 | port = mad_agent->context; | |
3229 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) | |
3230 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; | |
3231 | ||
3232 | /* | |
3233 | * If the send was in response to a received message (context[0] is not | |
3234 | * set to a cm_id), and is not a REJ, then it is a send that was | |
3235 | * manually retried. | |
3236 | */ | |
3237 | if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) | |
3238 | msg->retries = 1; | |
3239 | ||
3240 | atomic_long_add(1 + msg->retries, | |
3241 | &port->counter_group[CM_XMIT].counter[attr_index]); | |
3242 | if (msg->retries) | |
3243 | atomic_long_add(msg->retries, | |
3244 | &port->counter_group[CM_XMIT_RETRIES]. | |
3245 | counter[attr_index]); | |
a977049d HR |
3246 | |
3247 | switch (mad_send_wc->status) { | |
3248 | case IB_WC_SUCCESS: | |
3249 | case IB_WC_WR_FLUSH_ERR: | |
3250 | cm_free_msg(msg); | |
3251 | break; | |
3252 | default: | |
3253 | if (msg->context[0] && msg->context[1]) | |
3254 | cm_process_send_error(msg, mad_send_wc->status); | |
3255 | else | |
3256 | cm_free_msg(msg); | |
3257 | break; | |
3258 | } | |
3259 | } | |
3260 | ||
c4028958 | 3261 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3262 | { |
c4028958 | 3263 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3264 | int ret; |
3265 | ||
3266 | switch (work->cm_event.event) { | |
3267 | case IB_CM_REQ_RECEIVED: | |
3268 | ret = cm_req_handler(work); | |
3269 | break; | |
3270 | case IB_CM_MRA_RECEIVED: | |
3271 | ret = cm_mra_handler(work); | |
3272 | break; | |
3273 | case IB_CM_REJ_RECEIVED: | |
3274 | ret = cm_rej_handler(work); | |
3275 | break; | |
3276 | case IB_CM_REP_RECEIVED: | |
3277 | ret = cm_rep_handler(work); | |
3278 | break; | |
3279 | case IB_CM_RTU_RECEIVED: | |
3280 | ret = cm_rtu_handler(work); | |
3281 | break; | |
3282 | case IB_CM_USER_ESTABLISHED: | |
3283 | ret = cm_establish_handler(work); | |
3284 | break; | |
3285 | case IB_CM_DREQ_RECEIVED: | |
3286 | ret = cm_dreq_handler(work); | |
3287 | break; | |
3288 | case IB_CM_DREP_RECEIVED: | |
3289 | ret = cm_drep_handler(work); | |
3290 | break; | |
3291 | case IB_CM_SIDR_REQ_RECEIVED: | |
3292 | ret = cm_sidr_req_handler(work); | |
3293 | break; | |
3294 | case IB_CM_SIDR_REP_RECEIVED: | |
3295 | ret = cm_sidr_rep_handler(work); | |
3296 | break; | |
3297 | case IB_CM_LAP_RECEIVED: | |
3298 | ret = cm_lap_handler(work); | |
3299 | break; | |
3300 | case IB_CM_APR_RECEIVED: | |
3301 | ret = cm_apr_handler(work); | |
3302 | break; | |
3303 | case IB_CM_TIMEWAIT_EXIT: | |
3304 | ret = cm_timewait_handler(work); | |
3305 | break; | |
3306 | default: | |
3307 | ret = -EINVAL; | |
3308 | break; | |
3309 | } | |
3310 | if (ret) | |
3311 | cm_free_work(work); | |
3312 | } | |
3313 | ||
e1444b5a | 3314 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3315 | { |
3316 | struct cm_id_private *cm_id_priv; | |
3317 | struct cm_work *work; | |
3318 | unsigned long flags; | |
3319 | int ret = 0; | |
be4b4993 ES |
3320 | struct cm_device *cm_dev; |
3321 | ||
3322 | cm_dev = ib_get_client_data(cm_id->device, &cm_client); | |
3323 | if (!cm_dev) | |
3324 | return -ENODEV; | |
a977049d HR |
3325 | |
3326 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3327 | if (!work) | |
3328 | return -ENOMEM; | |
3329 | ||
3330 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3331 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3332 | switch (cm_id->state) | |
3333 | { | |
3334 | case IB_CM_REP_SENT: | |
3335 | case IB_CM_MRA_REP_RCVD: | |
3336 | cm_id->state = IB_CM_ESTABLISHED; | |
3337 | break; | |
3338 | case IB_CM_ESTABLISHED: | |
3339 | ret = -EISCONN; | |
3340 | break; | |
3341 | default: | |
3342 | ret = -EINVAL; | |
3343 | break; | |
3344 | } | |
3345 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3346 | ||
3347 | if (ret) { | |
3348 | kfree(work); | |
3349 | goto out; | |
3350 | } | |
3351 | ||
3352 | /* | |
3353 | * The CM worker thread may try to destroy the cm_id before it | |
3354 | * can execute this work item. To prevent potential deadlock, | |
3355 | * we need to find the cm_id once we're in the context of the | |
3356 | * worker thread, rather than holding a reference on it. | |
3357 | */ | |
c4028958 | 3358 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3359 | work->local_id = cm_id->local_id; |
3360 | work->remote_id = cm_id->remote_id; | |
3361 | work->mad_recv_wc = NULL; | |
3362 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
be4b4993 ES |
3363 | |
3364 | /* Check if the device started its remove_one */ | |
3365 | spin_lock_irq(&cm.lock); | |
3366 | if (!cm_dev->going_down) { | |
3367 | queue_delayed_work(cm.wq, &work->work, 0); | |
3368 | } else { | |
3369 | kfree(work); | |
3370 | ret = -ENODEV; | |
3371 | } | |
3372 | spin_unlock_irq(&cm.lock); | |
3373 | ||
a977049d HR |
3374 | out: |
3375 | return ret; | |
3376 | } | |
e1444b5a SH |
3377 | |
3378 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3379 | { | |
3380 | struct cm_id_private *cm_id_priv; | |
3381 | unsigned long flags; | |
3382 | int ret = 0; | |
3383 | ||
3384 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3385 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3386 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3387 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3388 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3389 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3390 | cm_id_priv->av = cm_id_priv->alt_av; | |
3391 | } else | |
3392 | ret = -EINVAL; | |
3393 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3394 | ||
3395 | return ret; | |
3396 | } | |
3397 | ||
3398 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3399 | { | |
3400 | int ret; | |
3401 | ||
3402 | switch (event) { | |
3403 | case IB_EVENT_COMM_EST: | |
3404 | ret = cm_establish(cm_id); | |
3405 | break; | |
3406 | case IB_EVENT_PATH_MIG: | |
3407 | ret = cm_migrate(cm_id); | |
3408 | break; | |
3409 | default: | |
3410 | ret = -EINVAL; | |
3411 | } | |
3412 | return ret; | |
3413 | } | |
3414 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3415 | |
3416 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3417 | struct ib_mad_recv_wc *mad_recv_wc) | |
3418 | { | |
9af57b7a | 3419 | struct cm_port *port = mad_agent->context; |
a977049d HR |
3420 | struct cm_work *work; |
3421 | enum ib_cm_event_type event; | |
9af57b7a | 3422 | u16 attr_id; |
a977049d | 3423 | int paths = 0; |
be4b4993 | 3424 | int going_down = 0; |
a977049d HR |
3425 | |
3426 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3427 | case CM_REQ_ATTR_ID: | |
3428 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3429 | alt_local_lid != 0); | |
3430 | event = IB_CM_REQ_RECEIVED; | |
3431 | break; | |
3432 | case CM_MRA_ATTR_ID: | |
3433 | event = IB_CM_MRA_RECEIVED; | |
3434 | break; | |
3435 | case CM_REJ_ATTR_ID: | |
3436 | event = IB_CM_REJ_RECEIVED; | |
3437 | break; | |
3438 | case CM_REP_ATTR_ID: | |
3439 | event = IB_CM_REP_RECEIVED; | |
3440 | break; | |
3441 | case CM_RTU_ATTR_ID: | |
3442 | event = IB_CM_RTU_RECEIVED; | |
3443 | break; | |
3444 | case CM_DREQ_ATTR_ID: | |
3445 | event = IB_CM_DREQ_RECEIVED; | |
3446 | break; | |
3447 | case CM_DREP_ATTR_ID: | |
3448 | event = IB_CM_DREP_RECEIVED; | |
3449 | break; | |
3450 | case CM_SIDR_REQ_ATTR_ID: | |
3451 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3452 | break; | |
3453 | case CM_SIDR_REP_ATTR_ID: | |
3454 | event = IB_CM_SIDR_REP_RECEIVED; | |
3455 | break; | |
3456 | case CM_LAP_ATTR_ID: | |
3457 | paths = 1; | |
3458 | event = IB_CM_LAP_RECEIVED; | |
3459 | break; | |
3460 | case CM_APR_ATTR_ID: | |
3461 | event = IB_CM_APR_RECEIVED; | |
3462 | break; | |
3463 | default: | |
3464 | ib_free_recv_mad(mad_recv_wc); | |
3465 | return; | |
3466 | } | |
3467 | ||
9af57b7a SH |
3468 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
3469 | atomic_long_inc(&port->counter_group[CM_RECV]. | |
3470 | counter[attr_id - CM_ATTR_ID_OFFSET]); | |
3471 | ||
a977049d HR |
3472 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
3473 | GFP_KERNEL); | |
3474 | if (!work) { | |
3475 | ib_free_recv_mad(mad_recv_wc); | |
3476 | return; | |
3477 | } | |
3478 | ||
c4028958 | 3479 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3480 | work->cm_event.event = event; |
3481 | work->mad_recv_wc = mad_recv_wc; | |
9af57b7a | 3482 | work->port = port; |
be4b4993 ES |
3483 | |
3484 | /* Check if the device started its remove_one */ | |
3485 | spin_lock_irq(&cm.lock); | |
3486 | if (!port->cm_dev->going_down) | |
3487 | queue_delayed_work(cm.wq, &work->work, 0); | |
3488 | else | |
3489 | going_down = 1; | |
3490 | spin_unlock_irq(&cm.lock); | |
3491 | ||
3492 | if (going_down) { | |
3493 | kfree(work); | |
3494 | ib_free_recv_mad(mad_recv_wc); | |
3495 | } | |
a977049d HR |
3496 | } |
3497 | ||
3498 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3499 | struct ib_qp_attr *qp_attr, | |
3500 | int *qp_attr_mask) | |
3501 | { | |
3502 | unsigned long flags; | |
3503 | int ret; | |
3504 | ||
3505 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3506 | switch (cm_id_priv->id.state) { | |
3507 | case IB_CM_REQ_SENT: | |
3508 | case IB_CM_MRA_REQ_RCVD: | |
3509 | case IB_CM_REQ_RCVD: | |
3510 | case IB_CM_MRA_REQ_SENT: | |
3511 | case IB_CM_REP_RCVD: | |
3512 | case IB_CM_MRA_REP_SENT: | |
3513 | case IB_CM_REP_SENT: | |
3514 | case IB_CM_MRA_REP_RCVD: | |
3515 | case IB_CM_ESTABLISHED: | |
3516 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3517 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 3518 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 3519 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3520 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3521 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3522 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3523 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3524 | ret = 0; | |
3525 | break; | |
3526 | default: | |
3527 | ret = -EINVAL; | |
3528 | break; | |
3529 | } | |
3530 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3531 | return ret; | |
3532 | } | |
3533 | ||
3534 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3535 | struct ib_qp_attr *qp_attr, | |
3536 | int *qp_attr_mask) | |
3537 | { | |
3538 | unsigned long flags; | |
3539 | int ret; | |
3540 | ||
3541 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3542 | switch (cm_id_priv->id.state) { | |
3543 | case IB_CM_REQ_RCVD: | |
3544 | case IB_CM_MRA_REQ_SENT: | |
3545 | case IB_CM_REP_RCVD: | |
3546 | case IB_CM_MRA_REP_SENT: | |
3547 | case IB_CM_REP_SENT: | |
3548 | case IB_CM_MRA_REP_RCVD: | |
3549 | case IB_CM_ESTABLISHED: | |
3550 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3551 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d | 3552 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
990acea6 WY |
3553 | if (!cm_id_priv->av.valid) { |
3554 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
dd5f03be | 3555 | return -EINVAL; |
990acea6 | 3556 | } |
dd5f03be MB |
3557 | if (cm_id_priv->av.ah_attr.vlan_id != 0xffff) { |
3558 | qp_attr->vlan_id = cm_id_priv->av.ah_attr.vlan_id; | |
3559 | *qp_attr_mask |= IB_QP_VID; | |
3560 | } | |
3561 | if (!is_zero_ether_addr(cm_id_priv->av.smac)) { | |
3562 | memcpy(qp_attr->smac, cm_id_priv->av.smac, | |
3563 | sizeof(qp_attr->smac)); | |
3564 | *qp_attr_mask |= IB_QP_SMAC; | |
3565 | } | |
3566 | if (cm_id_priv->alt_av.valid) { | |
3567 | if (cm_id_priv->alt_av.ah_attr.vlan_id != 0xffff) { | |
3568 | qp_attr->alt_vlan_id = | |
3569 | cm_id_priv->alt_av.ah_attr.vlan_id; | |
3570 | *qp_attr_mask |= IB_QP_ALT_VID; | |
3571 | } | |
3572 | if (!is_zero_ether_addr(cm_id_priv->alt_av.smac)) { | |
3573 | memcpy(qp_attr->alt_smac, | |
3574 | cm_id_priv->alt_av.smac, | |
3575 | sizeof(qp_attr->alt_smac)); | |
3576 | *qp_attr_mask |= IB_QP_ALT_SMAC; | |
3577 | } | |
3578 | } | |
a977049d HR |
3579 | qp_attr->path_mtu = cm_id_priv->path_mtu; |
3580 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3581 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
d26a360b SH |
3582 | if (cm_id_priv->qp_type == IB_QPT_RC || |
3583 | cm_id_priv->qp_type == IB_QPT_XRC_TGT) { | |
ae7971a7 SH |
3584 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
3585 | IB_QP_MIN_RNR_TIMER; | |
3586 | qp_attr->max_dest_rd_atomic = | |
3587 | cm_id_priv->responder_resources; | |
3588 | qp_attr->min_rnr_timer = 0; | |
3589 | } | |
a977049d HR |
3590 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3591 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3592 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 3593 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 3594 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
3595 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3596 | } | |
3597 | ret = 0; | |
3598 | break; | |
3599 | default: | |
3600 | ret = -EINVAL; | |
3601 | break; | |
3602 | } | |
3603 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3604 | return ret; | |
3605 | } | |
3606 | ||
3607 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3608 | struct ib_qp_attr *qp_attr, | |
3609 | int *qp_attr_mask) | |
3610 | { | |
3611 | unsigned long flags; | |
3612 | int ret; | |
3613 | ||
3614 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3615 | switch (cm_id_priv->id.state) { | |
0fe313b0 SH |
3616 | /* Allow transition to RTS before sending REP */ |
3617 | case IB_CM_REQ_RCVD: | |
3618 | case IB_CM_MRA_REQ_SENT: | |
3619 | ||
a977049d HR |
3620 | case IB_CM_REP_RCVD: |
3621 | case IB_CM_MRA_REP_SENT: | |
3622 | case IB_CM_REP_SENT: | |
3623 | case IB_CM_MRA_REP_RCVD: | |
3624 | case IB_CM_ESTABLISHED: | |
e1444b5a SH |
3625 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
3626 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
3627 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
d26a360b SH |
3628 | switch (cm_id_priv->qp_type) { |
3629 | case IB_QPT_RC: | |
3630 | case IB_QPT_XRC_INI: | |
3631 | *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY | | |
e1444b5a | 3632 | IB_QP_MAX_QP_RD_ATOMIC; |
e1444b5a SH |
3633 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
3634 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
d26a360b SH |
3635 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; |
3636 | /* fall through */ | |
3637 | case IB_QPT_XRC_TGT: | |
3638 | *qp_attr_mask |= IB_QP_TIMEOUT; | |
3639 | qp_attr->timeout = cm_id_priv->av.timeout; | |
3640 | break; | |
3641 | default: | |
3642 | break; | |
e1444b5a SH |
3643 | } |
3644 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3645 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3646 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3647 | } | |
3648 | } else { | |
3649 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
3650 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; | |
3651 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; | |
1d846126 | 3652 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 3653 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
3654 | qp_attr->path_mig_state = IB_MIG_REARM; |
3655 | } | |
3656 | ret = 0; | |
3657 | break; | |
3658 | default: | |
3659 | ret = -EINVAL; | |
3660 | break; | |
3661 | } | |
3662 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3663 | return ret; | |
3664 | } | |
3665 | ||
3666 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3667 | struct ib_qp_attr *qp_attr, | |
3668 | int *qp_attr_mask) | |
3669 | { | |
3670 | struct cm_id_private *cm_id_priv; | |
3671 | int ret; | |
3672 | ||
3673 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3674 | switch (qp_attr->qp_state) { | |
3675 | case IB_QPS_INIT: | |
3676 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3677 | break; | |
3678 | case IB_QPS_RTR: | |
3679 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3680 | break; | |
3681 | case IB_QPS_RTS: | |
3682 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3683 | break; | |
3684 | default: | |
3685 | ret = -EINVAL; | |
3686 | break; | |
3687 | } | |
3688 | return ret; | |
3689 | } | |
3690 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3691 | ||
454a01e7 | 3692 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
1d846126 SH |
3693 | { |
3694 | struct ib_device_attr attr; | |
3695 | ||
d4c4196f | 3696 | if (ib_query_device(cm_dev->ib_device, &attr)) |
1d846126 SH |
3697 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ |
3698 | else | |
3699 | cm_dev->ack_delay = attr.local_ca_ack_delay; | |
3700 | } | |
3701 | ||
9af57b7a SH |
3702 | static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, |
3703 | char *buf) | |
3704 | { | |
3705 | struct cm_counter_group *group; | |
3706 | struct cm_counter_attribute *cm_attr; | |
3707 | ||
3708 | group = container_of(obj, struct cm_counter_group, obj); | |
3709 | cm_attr = container_of(attr, struct cm_counter_attribute, attr); | |
3710 | ||
3711 | return sprintf(buf, "%ld\n", | |
3712 | atomic_long_read(&group->counter[cm_attr->index])); | |
3713 | } | |
3714 | ||
52cf25d0 | 3715 | static const struct sysfs_ops cm_counter_ops = { |
9af57b7a SH |
3716 | .show = cm_show_counter |
3717 | }; | |
3718 | ||
3719 | static struct kobj_type cm_counter_obj_type = { | |
3720 | .sysfs_ops = &cm_counter_ops, | |
3721 | .default_attrs = cm_counter_default_attrs | |
3722 | }; | |
3723 | ||
3724 | static void cm_release_port_obj(struct kobject *obj) | |
3725 | { | |
3726 | struct cm_port *cm_port; | |
3727 | ||
9af57b7a SH |
3728 | cm_port = container_of(obj, struct cm_port, port_obj); |
3729 | kfree(cm_port); | |
3730 | } | |
3731 | ||
3732 | static struct kobj_type cm_port_obj_type = { | |
3733 | .release = cm_release_port_obj | |
3734 | }; | |
3735 | ||
2c9ede55 | 3736 | static char *cm_devnode(struct device *dev, umode_t *mode) |
c3af0980 | 3737 | { |
b2bc4782 GR |
3738 | if (mode) |
3739 | *mode = 0666; | |
c3af0980 RD |
3740 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
3741 | } | |
3742 | ||
9af57b7a | 3743 | struct class cm_class = { |
c3af0980 | 3744 | .owner = THIS_MODULE, |
9af57b7a | 3745 | .name = "infiniband_cm", |
c3af0980 | 3746 | .devnode = cm_devnode, |
9af57b7a SH |
3747 | }; |
3748 | EXPORT_SYMBOL(cm_class); | |
3749 | ||
9af57b7a SH |
3750 | static int cm_create_port_fs(struct cm_port *port) |
3751 | { | |
3752 | int i, ret; | |
3753 | ||
3754 | ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, | |
110cf374 | 3755 | &port->cm_dev->device->kobj, |
9af57b7a SH |
3756 | "%d", port->port_num); |
3757 | if (ret) { | |
3758 | kfree(port); | |
3759 | return ret; | |
3760 | } | |
3761 | ||
3762 | for (i = 0; i < CM_COUNTER_GROUPS; i++) { | |
3763 | ret = kobject_init_and_add(&port->counter_group[i].obj, | |
3764 | &cm_counter_obj_type, | |
7c7a9bcc | 3765 | &port->port_obj, |
9af57b7a SH |
3766 | "%s", counter_group_names[i]); |
3767 | if (ret) | |
3768 | goto error; | |
3769 | } | |
3770 | ||
3771 | return 0; | |
3772 | ||
3773 | error: | |
3774 | while (i--) | |
7c7a9bcc RD |
3775 | kobject_put(&port->counter_group[i].obj); |
3776 | kobject_put(&port->port_obj); | |
9af57b7a SH |
3777 | return ret; |
3778 | ||
3779 | } | |
3780 | ||
3781 | static void cm_remove_port_fs(struct cm_port *port) | |
3782 | { | |
3783 | int i; | |
3784 | ||
3785 | for (i = 0; i < CM_COUNTER_GROUPS; i++) | |
7c7a9bcc | 3786 | kobject_put(&port->counter_group[i].obj); |
9af57b7a | 3787 | |
7c7a9bcc | 3788 | kobject_put(&port->port_obj); |
9af57b7a SH |
3789 | } |
3790 | ||
d4c4196f | 3791 | static void cm_add_one(struct ib_device *ib_device) |
a977049d HR |
3792 | { |
3793 | struct cm_device *cm_dev; | |
3794 | struct cm_port *port; | |
3795 | struct ib_mad_reg_req reg_req = { | |
3796 | .mgmt_class = IB_MGMT_CLASS_CM, | |
0f29b46d | 3797 | .mgmt_class_version = IB_CM_CLASS_VERSION, |
a977049d HR |
3798 | }; |
3799 | struct ib_port_modify port_modify = { | |
3800 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3801 | }; | |
3802 | unsigned long flags; | |
3803 | int ret; | |
091e6a4c | 3804 | int count = 0; |
a977049d HR |
3805 | u8 i; |
3806 | ||
9af57b7a | 3807 | cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * |
d4c4196f | 3808 | ib_device->phys_port_cnt, GFP_KERNEL); |
a977049d HR |
3809 | if (!cm_dev) |
3810 | return; | |
3811 | ||
d4c4196f | 3812 | cm_dev->ib_device = ib_device; |
1d846126 | 3813 | cm_get_ack_delay(cm_dev); |
be4b4993 | 3814 | cm_dev->going_down = 0; |
91bd418f GKH |
3815 | cm_dev->device = device_create(&cm_class, &ib_device->dev, |
3816 | MKDEV(0, 0), NULL, | |
3817 | "%s", ib_device->name); | |
3e340c05 | 3818 | if (IS_ERR(cm_dev->device)) { |
9af57b7a SH |
3819 | kfree(cm_dev); |
3820 | return; | |
3821 | } | |
3822 | ||
a977049d | 3823 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
d4c4196f | 3824 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
72219cea | 3825 | if (!rdma_cap_ib_cm(ib_device, i)) |
091e6a4c MW |
3826 | continue; |
3827 | ||
9af57b7a SH |
3828 | port = kzalloc(sizeof *port, GFP_KERNEL); |
3829 | if (!port) | |
3830 | goto error1; | |
3831 | ||
3832 | cm_dev->port[i-1] = port; | |
a977049d HR |
3833 | port->cm_dev = cm_dev; |
3834 | port->port_num = i; | |
9af57b7a SH |
3835 | |
3836 | ret = cm_create_port_fs(port); | |
3837 | if (ret) | |
3838 | goto error1; | |
3839 | ||
d4c4196f | 3840 | port->mad_agent = ib_register_mad_agent(ib_device, i, |
a977049d HR |
3841 | IB_QPT_GSI, |
3842 | ®_req, | |
3843 | 0, | |
3844 | cm_send_handler, | |
3845 | cm_recv_handler, | |
0f29b46d IW |
3846 | port, |
3847 | 0); | |
a977049d | 3848 | if (IS_ERR(port->mad_agent)) |
9af57b7a | 3849 | goto error2; |
a977049d | 3850 | |
d4c4196f | 3851 | ret = ib_modify_port(ib_device, i, 0, &port_modify); |
a977049d | 3852 | if (ret) |
9af57b7a | 3853 | goto error3; |
091e6a4c MW |
3854 | |
3855 | count++; | |
a977049d | 3856 | } |
091e6a4c MW |
3857 | |
3858 | if (!count) | |
3859 | goto free; | |
3860 | ||
d4c4196f | 3861 | ib_set_client_data(ib_device, &cm_client, cm_dev); |
a977049d HR |
3862 | |
3863 | write_lock_irqsave(&cm.device_lock, flags); | |
3864 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3865 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3866 | return; | |
3867 | ||
9af57b7a | 3868 | error3: |
cf311cd4 | 3869 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a SH |
3870 | error2: |
3871 | cm_remove_port_fs(port); | |
cf311cd4 | 3872 | error1: |
a977049d HR |
3873 | port_modify.set_port_cap_mask = 0; |
3874 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3875 | while (--i) { | |
72219cea | 3876 | if (!rdma_cap_ib_cm(ib_device, i)) |
091e6a4c MW |
3877 | continue; |
3878 | ||
9af57b7a | 3879 | port = cm_dev->port[i-1]; |
d4c4196f | 3880 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3881 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a | 3882 | cm_remove_port_fs(port); |
a977049d | 3883 | } |
091e6a4c | 3884 | free: |
110cf374 | 3885 | device_unregister(cm_dev->device); |
a7e80ce2 | 3886 | kfree(cm_dev); |
a977049d HR |
3887 | } |
3888 | ||
d4c4196f | 3889 | static void cm_remove_one(struct ib_device *ib_device) |
a977049d HR |
3890 | { |
3891 | struct cm_device *cm_dev; | |
3892 | struct cm_port *port; | |
3893 | struct ib_port_modify port_modify = { | |
3894 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3895 | }; | |
3896 | unsigned long flags; | |
3897 | int i; | |
3898 | ||
d4c4196f | 3899 | cm_dev = ib_get_client_data(ib_device, &cm_client); |
a977049d HR |
3900 | if (!cm_dev) |
3901 | return; | |
3902 | ||
3903 | write_lock_irqsave(&cm.device_lock, flags); | |
3904 | list_del(&cm_dev->list); | |
3905 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3906 | ||
be4b4993 ES |
3907 | spin_lock_irq(&cm.lock); |
3908 | cm_dev->going_down = 1; | |
3909 | spin_unlock_irq(&cm.lock); | |
3910 | ||
d4c4196f | 3911 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
72219cea | 3912 | if (!rdma_cap_ib_cm(ib_device, i)) |
091e6a4c MW |
3913 | continue; |
3914 | ||
9af57b7a | 3915 | port = cm_dev->port[i-1]; |
d4c4196f | 3916 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
be4b4993 ES |
3917 | /* |
3918 | * We flush the queue here after the going_down set, this | |
3919 | * verify that no new works will be queued in the recv handler, | |
3920 | * after that we can call the unregister_mad_agent | |
3921 | */ | |
84ba284c | 3922 | flush_workqueue(cm.wq); |
be4b4993 | 3923 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a | 3924 | cm_remove_port_fs(port); |
a977049d | 3925 | } |
110cf374 | 3926 | device_unregister(cm_dev->device); |
a7e80ce2 | 3927 | kfree(cm_dev); |
a977049d HR |
3928 | } |
3929 | ||
3930 | static int __init ib_cm_init(void) | |
3931 | { | |
3932 | int ret; | |
3933 | ||
3934 | memset(&cm, 0, sizeof cm); | |
3935 | INIT_LIST_HEAD(&cm.device_list); | |
3936 | rwlock_init(&cm.device_lock); | |
3937 | spin_lock_init(&cm.lock); | |
3938 | cm.listen_service_table = RB_ROOT; | |
9c3da099 | 3939 | cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
a977049d HR |
3940 | cm.remote_id_table = RB_ROOT; |
3941 | cm.remote_qp_table = RB_ROOT; | |
3942 | cm.remote_sidr_table = RB_ROOT; | |
3943 | idr_init(&cm.local_id_table); | |
f06d2653 | 3944 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
8575329d | 3945 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d | 3946 | |
9af57b7a | 3947 | ret = class_register(&cm_class); |
87d4abda DB |
3948 | if (ret) { |
3949 | ret = -ENOMEM; | |
3950 | goto error1; | |
3951 | } | |
a977049d | 3952 | |
9af57b7a SH |
3953 | cm.wq = create_workqueue("ib_cm"); |
3954 | if (!cm.wq) { | |
3955 | ret = -ENOMEM; | |
87d4abda | 3956 | goto error2; |
9af57b7a SH |
3957 | } |
3958 | ||
a977049d HR |
3959 | ret = ib_register_client(&cm_client); |
3960 | if (ret) | |
87d4abda | 3961 | goto error3; |
a977049d HR |
3962 | |
3963 | return 0; | |
87d4abda | 3964 | error3: |
a977049d | 3965 | destroy_workqueue(cm.wq); |
87d4abda | 3966 | error2: |
9af57b7a | 3967 | class_unregister(&cm_class); |
87d4abda DB |
3968 | error1: |
3969 | idr_destroy(&cm.local_id_table); | |
a977049d HR |
3970 | return ret; |
3971 | } | |
3972 | ||
3973 | static void __exit ib_cm_cleanup(void) | |
3974 | { | |
8575329d SH |
3975 | struct cm_timewait_info *timewait_info, *tmp; |
3976 | ||
3977 | spin_lock_irq(&cm.lock); | |
3978 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3979 | cancel_delayed_work(&timewait_info->work.work); | |
3980 | spin_unlock_irq(&cm.lock); | |
3981 | ||
84ba284c | 3982 | ib_unregister_client(&cm_client); |
a977049d | 3983 | destroy_workqueue(cm.wq); |
8575329d SH |
3984 | |
3985 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3986 | list_del(&timewait_info->list); | |
3987 | kfree(timewait_info); | |
3988 | } | |
3989 | ||
9af57b7a | 3990 | class_unregister(&cm_class); |
5d7edb3c | 3991 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3992 | } |
3993 | ||
3994 | module_init(ib_cm_init); | |
3995 | module_exit(ib_cm_cleanup); | |
3996 |