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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); | |
7c1eb45a | 61 | static void cm_remove_one(struct ib_device *device, void *client_data); |
a977049d HR |
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 | 215 | atomic_t refcount; |
067b171b HE |
216 | /* Number of clients sharing this ib_cm_id. Only valid for listeners. |
217 | * Protected by the cm.lock spinlock. */ | |
218 | int listen_sharecount; | |
a977049d HR |
219 | |
220 | struct ib_mad_send_buf *msg; | |
221 | struct cm_timewait_info *timewait_info; | |
222 | /* todo: use alternate port on send failure */ | |
223 | struct cm_av av; | |
224 | struct cm_av alt_av; | |
225 | ||
226 | void *private_data; | |
97f52eb4 SH |
227 | __be64 tid; |
228 | __be32 local_qpn; | |
229 | __be32 remote_qpn; | |
ae7971a7 | 230 | enum ib_qp_type qp_type; |
97f52eb4 SH |
231 | __be32 sq_psn; |
232 | __be32 rq_psn; | |
a977049d HR |
233 | int timeout_ms; |
234 | enum ib_mtu path_mtu; | |
e1444b5a | 235 | __be16 pkey; |
a977049d HR |
236 | u8 private_data_len; |
237 | u8 max_cm_retries; | |
238 | u8 peer_to_peer; | |
239 | u8 responder_resources; | |
240 | u8 initiator_depth; | |
a977049d HR |
241 | u8 retry_count; |
242 | u8 rnr_retry_count; | |
243 | u8 service_timeout; | |
1d846126 | 244 | u8 target_ack_delay; |
a977049d HR |
245 | |
246 | struct list_head work_list; | |
247 | atomic_t work_count; | |
248 | }; | |
249 | ||
c4028958 | 250 | static void cm_work_handler(struct work_struct *work); |
a977049d HR |
251 | |
252 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
253 | { | |
254 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 255 | complete(&cm_id_priv->comp); |
a977049d HR |
256 | } |
257 | ||
258 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
259 | struct ib_mad_send_buf **msg) | |
260 | { | |
261 | struct ib_mad_agent *mad_agent; | |
262 | struct ib_mad_send_buf *m; | |
263 | struct ib_ah *ah; | |
264 | ||
265 | mad_agent = cm_id_priv->av.port->mad_agent; | |
266 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
267 | if (IS_ERR(ah)) | |
268 | return PTR_ERR(ah); | |
269 | ||
3cd96564 | 270 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
354ba39c | 271 | cm_id_priv->av.pkey_index, |
34816ad9 | 272 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
da2dfaa3 IW |
273 | GFP_ATOMIC, |
274 | IB_MGMT_BASE_VERSION); | |
a977049d HR |
275 | if (IS_ERR(m)) { |
276 | ib_destroy_ah(ah); | |
277 | return PTR_ERR(m); | |
278 | } | |
279 | ||
280 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
281 | m->ah = ah; |
282 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
283 | |
284 | atomic_inc(&cm_id_priv->refcount); | |
285 | m->context[0] = cm_id_priv; | |
286 | *msg = m; | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int cm_alloc_response_msg(struct cm_port *port, | |
291 | struct ib_mad_recv_wc *mad_recv_wc, | |
292 | struct ib_mad_send_buf **msg) | |
293 | { | |
294 | struct ib_mad_send_buf *m; | |
295 | struct ib_ah *ah; | |
296 | ||
297 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
298 | mad_recv_wc->recv_buf.grh, port->port_num); | |
299 | if (IS_ERR(ah)) | |
300 | return PTR_ERR(ah); | |
301 | ||
302 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 303 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
da2dfaa3 IW |
304 | GFP_ATOMIC, |
305 | IB_MGMT_BASE_VERSION); | |
a977049d HR |
306 | if (IS_ERR(m)) { |
307 | ib_destroy_ah(ah); | |
308 | return PTR_ERR(m); | |
309 | } | |
34816ad9 | 310 | m->ah = ah; |
a977049d HR |
311 | *msg = m; |
312 | return 0; | |
313 | } | |
314 | ||
315 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
316 | { | |
34816ad9 | 317 | ib_destroy_ah(msg->ah); |
a977049d HR |
318 | if (msg->context[0]) |
319 | cm_deref_id(msg->context[0]); | |
320 | ib_free_send_mad(msg); | |
321 | } | |
322 | ||
323 | static void * cm_copy_private_data(const void *private_data, | |
324 | u8 private_data_len) | |
325 | { | |
326 | void *data; | |
327 | ||
328 | if (!private_data || !private_data_len) | |
329 | return NULL; | |
330 | ||
bed8bdfd | 331 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
a977049d HR |
332 | if (!data) |
333 | return ERR_PTR(-ENOMEM); | |
334 | ||
a977049d HR |
335 | return data; |
336 | } | |
337 | ||
338 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
339 | void *private_data, u8 private_data_len) | |
340 | { | |
341 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
342 | kfree(cm_id_priv->private_data); | |
343 | ||
344 | cm_id_priv->private_data = private_data; | |
345 | cm_id_priv->private_data_len = private_data_len; | |
346 | } | |
347 | ||
ca222c6b SH |
348 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
349 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
350 | { |
351 | av->port = port; | |
352 | av->pkey_index = wc->pkey_index; | |
d4c4196f | 353 | ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc, |
ca222c6b | 354 | grh, &av->ah_attr); |
a977049d HR |
355 | } |
356 | ||
357 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
358 | { | |
359 | struct cm_device *cm_dev; | |
360 | struct cm_port *port = NULL; | |
361 | unsigned long flags; | |
362 | int ret; | |
363 | u8 p; | |
364 | ||
365 | read_lock_irqsave(&cm.device_lock, flags); | |
366 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
d4c4196f | 367 | if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid, |
a977049d | 368 | &p, NULL)) { |
9af57b7a | 369 | port = cm_dev->port[p-1]; |
a977049d HR |
370 | break; |
371 | } | |
372 | } | |
373 | read_unlock_irqrestore(&cm.device_lock, flags); | |
374 | ||
375 | if (!port) | |
376 | return -EINVAL; | |
377 | ||
d4c4196f | 378 | ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num, |
a977049d HR |
379 | be16_to_cpu(path->pkey), &av->pkey_index); |
380 | if (ret) | |
381 | return ret; | |
382 | ||
383 | av->port = port; | |
d4c4196f | 384 | ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path, |
ca222c6b | 385 | &av->ah_attr); |
1d846126 | 386 | av->timeout = path->packet_life_time + 1; |
dd5f03be MB |
387 | memcpy(av->smac, path->smac, sizeof(av->smac)); |
388 | ||
389 | av->valid = 1; | |
a977049d HR |
390 | return 0; |
391 | } | |
392 | ||
393 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
394 | { | |
395 | unsigned long flags; | |
3b069c5d | 396 | int id; |
a977049d | 397 | |
3b069c5d TH |
398 | idr_preload(GFP_KERNEL); |
399 | spin_lock_irqsave(&cm.lock, flags); | |
400 | ||
ab626d1a | 401 | id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT); |
3b069c5d TH |
402 | |
403 | spin_unlock_irqrestore(&cm.lock, flags); | |
404 | idr_preload_end(); | |
f06d2653 | 405 | |
1b90c137 | 406 | cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; |
3b069c5d | 407 | return id < 0 ? id : 0; |
a977049d HR |
408 | } |
409 | ||
97f52eb4 | 410 | static void cm_free_id(__be32 local_id) |
a977049d | 411 | { |
24be6e81 | 412 | spin_lock_irq(&cm.lock); |
f06d2653 SH |
413 | idr_remove(&cm.local_id_table, |
414 | (__force int) (local_id ^ cm.random_id_operand)); | |
24be6e81 | 415 | spin_unlock_irq(&cm.lock); |
a977049d HR |
416 | } |
417 | ||
97f52eb4 | 418 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
419 | { |
420 | struct cm_id_private *cm_id_priv; | |
421 | ||
f06d2653 SH |
422 | cm_id_priv = idr_find(&cm.local_id_table, |
423 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
424 | if (cm_id_priv) { |
425 | if (cm_id_priv->id.remote_id == remote_id) | |
426 | atomic_inc(&cm_id_priv->refcount); | |
427 | else | |
428 | cm_id_priv = NULL; | |
429 | } | |
430 | ||
431 | return cm_id_priv; | |
432 | } | |
433 | ||
97f52eb4 | 434 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
435 | { |
436 | struct cm_id_private *cm_id_priv; | |
a977049d | 437 | |
24be6e81 | 438 | spin_lock_irq(&cm.lock); |
a977049d | 439 | cm_id_priv = cm_get_id(local_id, remote_id); |
24be6e81 | 440 | spin_unlock_irq(&cm.lock); |
a977049d HR |
441 | |
442 | return cm_id_priv; | |
443 | } | |
444 | ||
a88f4888 RD |
445 | /* |
446 | * Trivial helpers to strip endian annotation and compare; the | |
447 | * endianness doesn't actually matter since we just need a stable | |
448 | * order for the RB tree. | |
449 | */ | |
450 | static int be32_lt(__be32 a, __be32 b) | |
451 | { | |
452 | return (__force u32) a < (__force u32) b; | |
453 | } | |
454 | ||
455 | static int be32_gt(__be32 a, __be32 b) | |
456 | { | |
457 | return (__force u32) a > (__force u32) b; | |
458 | } | |
459 | ||
460 | static int be64_lt(__be64 a, __be64 b) | |
461 | { | |
462 | return (__force u64) a < (__force u64) b; | |
463 | } | |
464 | ||
465 | static int be64_gt(__be64 a, __be64 b) | |
466 | { | |
467 | return (__force u64) a > (__force u64) b; | |
468 | } | |
469 | ||
a977049d HR |
470 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
471 | { | |
472 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
473 | struct rb_node *parent = NULL; | |
474 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
475 | __be64 service_id = cm_id_priv->id.service_id; |
476 | __be64 service_mask = cm_id_priv->id.service_mask; | |
a977049d HR |
477 | |
478 | while (*link) { | |
479 | parent = *link; | |
480 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
481 | service_node); | |
482 | if ((cur_cm_id_priv->id.service_mask & service_id) == | |
07d357d0 | 483 | (service_mask & cur_cm_id_priv->id.service_id) && |
73fec7fd | 484 | (cm_id_priv->id.device == cur_cm_id_priv->id.device)) |
07d357d0 SH |
485 | return cur_cm_id_priv; |
486 | ||
487 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
488 | link = &(*link)->rb_left; | |
489 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
490 | link = &(*link)->rb_right; | |
a88f4888 | 491 | else if (be64_lt(service_id, cur_cm_id_priv->id.service_id)) |
a977049d | 492 | link = &(*link)->rb_left; |
a88f4888 | 493 | else if (be64_gt(service_id, cur_cm_id_priv->id.service_id)) |
6e61d04f | 494 | link = &(*link)->rb_right; |
a977049d HR |
495 | else |
496 | link = &(*link)->rb_right; | |
497 | } | |
498 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
499 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
500 | return NULL; | |
501 | } | |
502 | ||
07d357d0 | 503 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
73fec7fd | 504 | __be64 service_id) |
a977049d HR |
505 | { |
506 | struct rb_node *node = cm.listen_service_table.rb_node; | |
507 | struct cm_id_private *cm_id_priv; | |
508 | ||
509 | while (node) { | |
510 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
511 | if ((cm_id_priv->id.service_mask & service_id) == | |
07d357d0 | 512 | cm_id_priv->id.service_id && |
73fec7fd | 513 | (cm_id_priv->id.device == device)) |
a977049d | 514 | return cm_id_priv; |
07d357d0 SH |
515 | |
516 | if (device < cm_id_priv->id.device) | |
517 | node = node->rb_left; | |
518 | else if (device > cm_id_priv->id.device) | |
519 | node = node->rb_right; | |
a88f4888 | 520 | else if (be64_lt(service_id, cm_id_priv->id.service_id)) |
a977049d | 521 | node = node->rb_left; |
a88f4888 | 522 | else if (be64_gt(service_id, cm_id_priv->id.service_id)) |
6e61d04f | 523 | node = node->rb_right; |
a977049d HR |
524 | else |
525 | node = node->rb_right; | |
526 | } | |
527 | return NULL; | |
528 | } | |
529 | ||
530 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
531 | *timewait_info) | |
532 | { | |
533 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
534 | struct rb_node *parent = NULL; | |
535 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
536 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
537 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
538 | |
539 | while (*link) { | |
540 | parent = *link; | |
541 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
542 | remote_id_node); | |
a88f4888 | 543 | if (be32_lt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 544 | link = &(*link)->rb_left; |
a88f4888 | 545 | else if (be32_gt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 546 | link = &(*link)->rb_right; |
a88f4888 | 547 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 548 | link = &(*link)->rb_left; |
a88f4888 | 549 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
550 | link = &(*link)->rb_right; |
551 | else | |
552 | return cur_timewait_info; | |
553 | } | |
554 | timewait_info->inserted_remote_id = 1; | |
555 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
556 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
557 | return NULL; | |
558 | } | |
559 | ||
97f52eb4 SH |
560 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
561 | __be32 remote_id) | |
a977049d HR |
562 | { |
563 | struct rb_node *node = cm.remote_id_table.rb_node; | |
564 | struct cm_timewait_info *timewait_info; | |
565 | ||
566 | while (node) { | |
567 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
568 | remote_id_node); | |
a88f4888 | 569 | if (be32_lt(remote_id, timewait_info->work.remote_id)) |
a977049d | 570 | node = node->rb_left; |
a88f4888 | 571 | else if (be32_gt(remote_id, timewait_info->work.remote_id)) |
a977049d | 572 | node = node->rb_right; |
a88f4888 | 573 | else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d | 574 | node = node->rb_left; |
a88f4888 | 575 | else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d HR |
576 | node = node->rb_right; |
577 | else | |
578 | return timewait_info; | |
579 | } | |
580 | return NULL; | |
581 | } | |
582 | ||
583 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
584 | *timewait_info) | |
585 | { | |
586 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
587 | struct rb_node *parent = NULL; | |
588 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
589 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
590 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
591 | |
592 | while (*link) { | |
593 | parent = *link; | |
594 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
595 | remote_qp_node); | |
a88f4888 | 596 | if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 597 | link = &(*link)->rb_left; |
a88f4888 | 598 | else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 599 | link = &(*link)->rb_right; |
a88f4888 | 600 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 601 | link = &(*link)->rb_left; |
a88f4888 | 602 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
603 | link = &(*link)->rb_right; |
604 | else | |
605 | return cur_timewait_info; | |
606 | } | |
607 | timewait_info->inserted_remote_qp = 1; | |
608 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
609 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
610 | return NULL; | |
611 | } | |
612 | ||
613 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
614 | *cm_id_priv) | |
615 | { | |
616 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
617 | struct rb_node *parent = NULL; | |
618 | struct cm_id_private *cur_cm_id_priv; | |
619 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 620 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
621 | |
622 | while (*link) { | |
623 | parent = *link; | |
624 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
625 | sidr_id_node); | |
a88f4888 | 626 | if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d | 627 | link = &(*link)->rb_left; |
a88f4888 | 628 | else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d HR |
629 | link = &(*link)->rb_right; |
630 | else { | |
631 | int cmp; | |
632 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
633 | sizeof *port_gid); | |
634 | if (cmp < 0) | |
635 | link = &(*link)->rb_left; | |
636 | else if (cmp > 0) | |
637 | link = &(*link)->rb_right; | |
638 | else | |
639 | return cur_cm_id_priv; | |
640 | } | |
641 | } | |
642 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
643 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
644 | return NULL; | |
645 | } | |
646 | ||
647 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
648 | enum ib_cm_sidr_status status) | |
649 | { | |
650 | struct ib_cm_sidr_rep_param param; | |
651 | ||
652 | memset(¶m, 0, sizeof param); | |
653 | param.status = status; | |
654 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
655 | } | |
656 | ||
07d357d0 SH |
657 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
658 | ib_cm_handler cm_handler, | |
a977049d HR |
659 | void *context) |
660 | { | |
661 | struct cm_id_private *cm_id_priv; | |
662 | int ret; | |
663 | ||
de6eb66b | 664 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
665 | if (!cm_id_priv) |
666 | return ERR_PTR(-ENOMEM); | |
667 | ||
a977049d | 668 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 669 | cm_id_priv->id.device = device; |
a977049d HR |
670 | cm_id_priv->id.cm_handler = cm_handler; |
671 | cm_id_priv->id.context = context; | |
354ba39c | 672 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
673 | ret = cm_alloc_id(cm_id_priv); |
674 | if (ret) | |
675 | goto error; | |
676 | ||
677 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 678 | init_completion(&cm_id_priv->comp); |
a977049d HR |
679 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
680 | atomic_set(&cm_id_priv->work_count, -1); | |
681 | atomic_set(&cm_id_priv->refcount, 1); | |
682 | return &cm_id_priv->id; | |
683 | ||
684 | error: | |
685 | kfree(cm_id_priv); | |
686 | return ERR_PTR(-ENOMEM); | |
687 | } | |
688 | EXPORT_SYMBOL(ib_create_cm_id); | |
689 | ||
690 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
691 | { | |
692 | struct cm_work *work; | |
693 | ||
694 | if (list_empty(&cm_id_priv->work_list)) | |
695 | return NULL; | |
696 | ||
697 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
698 | list_del(&work->list); | |
699 | return work; | |
700 | } | |
701 | ||
702 | static void cm_free_work(struct cm_work *work) | |
703 | { | |
704 | if (work->mad_recv_wc) | |
705 | ib_free_recv_mad(work->mad_recv_wc); | |
706 | kfree(work); | |
707 | } | |
708 | ||
709 | static inline int cm_convert_to_ms(int iba_time) | |
710 | { | |
711 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
712 | return 1 << max(iba_time - 8, 0); | |
713 | } | |
714 | ||
1d846126 SH |
715 | /* |
716 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time | |
717 | * Because of how ack_timeout is stored, adding one doubles the timeout. | |
718 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and | |
719 | * increment it (round up) only if the other is within 50%. | |
720 | */ | |
721 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) | |
722 | { | |
723 | int ack_timeout = packet_life_time + 1; | |
724 | ||
725 | if (ack_timeout >= ca_ack_delay) | |
726 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); | |
727 | else | |
728 | ack_timeout = ca_ack_delay + | |
729 | (ack_timeout >= (ca_ack_delay - 1)); | |
730 | ||
731 | return min(31, ack_timeout); | |
732 | } | |
733 | ||
a977049d HR |
734 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
735 | { | |
a977049d HR |
736 | if (timewait_info->inserted_remote_id) { |
737 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
738 | timewait_info->inserted_remote_id = 0; | |
739 | } | |
740 | ||
741 | if (timewait_info->inserted_remote_qp) { | |
742 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
743 | timewait_info->inserted_remote_qp = 0; | |
744 | } | |
a977049d HR |
745 | } |
746 | ||
97f52eb4 | 747 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
748 | { |
749 | struct cm_timewait_info *timewait_info; | |
750 | ||
de6eb66b | 751 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
752 | if (!timewait_info) |
753 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
754 | |
755 | timewait_info->work.local_id = local_id; | |
c4028958 | 756 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
a977049d HR |
757 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
758 | return timewait_info; | |
759 | } | |
760 | ||
761 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
762 | { | |
763 | int wait_time; | |
8575329d | 764 | unsigned long flags; |
be4b4993 ES |
765 | struct cm_device *cm_dev; |
766 | ||
767 | cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client); | |
768 | if (!cm_dev) | |
769 | return; | |
a977049d | 770 | |
8575329d | 771 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 772 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
773 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
774 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 775 | |
a977049d HR |
776 | /* |
777 | * The cm_id could be destroyed by the user before we exit timewait. | |
778 | * To protect against this, we search for the cm_id after exiting | |
779 | * timewait before notifying the user that we've exited timewait. | |
780 | */ | |
781 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
1d846126 | 782 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
be4b4993 ES |
783 | |
784 | /* Check if the device started its remove_one */ | |
785 | spin_lock_irq(&cm.lock); | |
786 | if (!cm_dev->going_down) | |
787 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
788 | msecs_to_jiffies(wait_time)); | |
789 | spin_unlock_irq(&cm.lock); | |
790 | ||
a977049d HR |
791 | cm_id_priv->timewait_info = NULL; |
792 | } | |
793 | ||
794 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
795 | { | |
8575329d SH |
796 | unsigned long flags; |
797 | ||
a977049d HR |
798 | cm_id_priv->id.state = IB_CM_IDLE; |
799 | if (cm_id_priv->timewait_info) { | |
8575329d | 800 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 801 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 802 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
803 | kfree(cm_id_priv->timewait_info); |
804 | cm_id_priv->timewait_info = NULL; | |
805 | } | |
806 | } | |
807 | ||
04c33543 | 808 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
809 | { |
810 | struct cm_id_private *cm_id_priv; | |
811 | struct cm_work *work; | |
a977049d HR |
812 | |
813 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
814 | retest: | |
24be6e81 | 815 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
816 | switch (cm_id->state) { |
817 | case IB_CM_LISTEN: | |
24be6e81 | 818 | spin_unlock_irq(&cm_id_priv->lock); |
067b171b | 819 | |
24be6e81 | 820 | spin_lock_irq(&cm.lock); |
067b171b HE |
821 | if (--cm_id_priv->listen_sharecount > 0) { |
822 | /* The id is still shared. */ | |
823 | cm_deref_id(cm_id_priv); | |
824 | spin_unlock_irq(&cm.lock); | |
825 | return; | |
826 | } | |
a977049d | 827 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
24be6e81 | 828 | spin_unlock_irq(&cm.lock); |
a977049d HR |
829 | break; |
830 | case IB_CM_SIDR_REQ_SENT: | |
831 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 832 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 833 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
834 | break; |
835 | case IB_CM_SIDR_REQ_RCVD: | |
24be6e81 | 836 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 837 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
0ca81a28 DT |
838 | spin_lock_irq(&cm.lock); |
839 | if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) | |
840 | rb_erase(&cm_id_priv->sidr_id_node, | |
841 | &cm.remote_sidr_table); | |
842 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
843 | break; |
844 | case IB_CM_REQ_SENT: | |
c29ed5a4 | 845 | case IB_CM_MRA_REQ_RCVD: |
227eca83 | 846 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 847 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 | 848 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
e971b8cd SH |
849 | &cm_id_priv->id.device->node_guid, |
850 | sizeof cm_id_priv->id.device->node_guid, | |
227eca83 SH |
851 | NULL, 0); |
852 | break; | |
04c33543 MT |
853 | case IB_CM_REQ_RCVD: |
854 | if (err == -ENOMEM) { | |
855 | /* Do not reject to allow future retries. */ | |
856 | cm_reset_to_idle(cm_id_priv); | |
24be6e81 | 857 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 | 858 | } else { |
24be6e81 | 859 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 MT |
860 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
861 | NULL, 0, NULL, 0); | |
862 | } | |
863 | break; | |
a977049d HR |
864 | case IB_CM_REP_SENT: |
865 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 866 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 867 | /* Fall through */ |
a977049d HR |
868 | case IB_CM_MRA_REQ_SENT: |
869 | case IB_CM_REP_RCVD: | |
870 | case IB_CM_MRA_REP_SENT: | |
24be6e81 | 871 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 SH |
872 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
873 | NULL, 0, NULL, 0); | |
a977049d HR |
874 | break; |
875 | case IB_CM_ESTABLISHED: | |
24be6e81 | 876 | spin_unlock_irq(&cm_id_priv->lock); |
2622e18e SH |
877 | if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) |
878 | break; | |
a977049d HR |
879 | ib_send_cm_dreq(cm_id, NULL, 0); |
880 | goto retest; | |
881 | case IB_CM_DREQ_SENT: | |
34816ad9 | 882 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 883 | cm_enter_timewait(cm_id_priv); |
24be6e81 | 884 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
885 | break; |
886 | case IB_CM_DREQ_RCVD: | |
24be6e81 | 887 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
888 | ib_send_cm_drep(cm_id, NULL, 0); |
889 | break; | |
890 | default: | |
24be6e81 | 891 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
892 | break; |
893 | } | |
894 | ||
895 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
896 | cm_deref_id(cm_id_priv); |
897 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
898 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
899 | cm_free_work(work); | |
6e61d04f | 900 | kfree(cm_id_priv->private_data); |
a977049d HR |
901 | kfree(cm_id_priv); |
902 | } | |
04c33543 MT |
903 | |
904 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
905 | { | |
906 | cm_destroy_id(cm_id, 0); | |
907 | } | |
a977049d HR |
908 | EXPORT_SYMBOL(ib_destroy_cm_id); |
909 | ||
067b171b HE |
910 | /** |
911 | * __ib_cm_listen - Initiates listening on the specified service ID for | |
912 | * connection and service ID resolution requests. | |
913 | * @cm_id: Connection identifier associated with the listen request. | |
914 | * @service_id: Service identifier matched against incoming connection | |
915 | * and service ID resolution requests. The service ID should be specified | |
916 | * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will | |
917 | * assign a service ID to the caller. | |
918 | * @service_mask: Mask applied to service ID used to listen across a | |
919 | * range of service IDs. If set to 0, the service ID is matched | |
920 | * exactly. This parameter is ignored if %service_id is set to | |
921 | * IB_CM_ASSIGN_SERVICE_ID. | |
067b171b HE |
922 | */ |
923 | static int __ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, | |
73fec7fd | 924 | __be64 service_mask) |
a977049d HR |
925 | { |
926 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
a977049d HR |
927 | int ret = 0; |
928 | ||
9c3da099 | 929 | service_mask = service_mask ? service_mask : ~cpu_to_be64(0); |
a977049d HR |
930 | service_id &= service_mask; |
931 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
932 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
933 | return -EINVAL; | |
934 | ||
935 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
936 | if (cm_id->state != IB_CM_IDLE) |
937 | return -EINVAL; | |
938 | ||
a977049d | 939 | cm_id->state = IB_CM_LISTEN; |
067b171b | 940 | ++cm_id_priv->listen_sharecount; |
73fec7fd | 941 | |
a977049d | 942 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { |
97f52eb4 | 943 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
9c3da099 | 944 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
945 | } else { |
946 | cm_id->service_id = service_id; | |
947 | cm_id->service_mask = service_mask; | |
948 | } | |
949 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
a977049d HR |
950 | |
951 | if (cur_cm_id_priv) { | |
952 | cm_id->state = IB_CM_IDLE; | |
067b171b | 953 | --cm_id_priv->listen_sharecount; |
a977049d HR |
954 | ret = -EBUSY; |
955 | } | |
956 | return ret; | |
957 | } | |
067b171b | 958 | |
73fec7fd | 959 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask) |
067b171b | 960 | { |
73fec7fd HE |
961 | unsigned long flags; |
962 | int ret; | |
963 | ||
964 | spin_lock_irqsave(&cm.lock, flags); | |
965 | ret = __ib_cm_listen(cm_id, service_id, service_mask); | |
966 | spin_unlock_irqrestore(&cm.lock, flags); | |
967 | ||
968 | return ret; | |
067b171b | 969 | } |
a977049d HR |
970 | EXPORT_SYMBOL(ib_cm_listen); |
971 | ||
067b171b HE |
972 | /** |
973 | * Create a new listening ib_cm_id and listen on the given service ID. | |
974 | * | |
975 | * If there's an existing ID listening on that same device and service ID, | |
976 | * return it. | |
977 | * | |
978 | * @device: Device associated with the cm_id. All related communication will | |
979 | * be associated with the specified device. | |
980 | * @cm_handler: Callback invoked to notify the user of CM events. | |
981 | * @service_id: Service identifier matched against incoming connection | |
982 | * and service ID resolution requests. The service ID should be specified | |
983 | * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will | |
984 | * assign a service ID to the caller. | |
985 | * | |
986 | * Callers should call ib_destroy_cm_id when done with the listener ID. | |
987 | */ | |
988 | struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device, | |
989 | ib_cm_handler cm_handler, | |
990 | __be64 service_id) | |
991 | { | |
992 | struct cm_id_private *cm_id_priv; | |
993 | struct ib_cm_id *cm_id; | |
994 | unsigned long flags; | |
995 | int err = 0; | |
996 | ||
997 | /* Create an ID in advance, since the creation may sleep */ | |
998 | cm_id = ib_create_cm_id(device, cm_handler, NULL); | |
999 | if (IS_ERR(cm_id)) | |
1000 | return cm_id; | |
1001 | ||
1002 | spin_lock_irqsave(&cm.lock, flags); | |
1003 | ||
1004 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) | |
1005 | goto new_id; | |
1006 | ||
1007 | /* Find an existing ID */ | |
73fec7fd | 1008 | cm_id_priv = cm_find_listen(device, service_id); |
067b171b HE |
1009 | if (cm_id_priv) { |
1010 | if (cm_id->cm_handler != cm_handler || cm_id->context) { | |
1011 | /* Sharing an ib_cm_id with different handlers is not | |
1012 | * supported */ | |
1013 | spin_unlock_irqrestore(&cm.lock, flags); | |
1014 | return ERR_PTR(-EINVAL); | |
1015 | } | |
1016 | atomic_inc(&cm_id_priv->refcount); | |
1017 | ++cm_id_priv->listen_sharecount; | |
1018 | spin_unlock_irqrestore(&cm.lock, flags); | |
1019 | ||
1020 | ib_destroy_cm_id(cm_id); | |
1021 | cm_id = &cm_id_priv->id; | |
1022 | return cm_id; | |
1023 | } | |
1024 | ||
1025 | new_id: | |
1026 | /* Use newly created ID */ | |
73fec7fd | 1027 | err = __ib_cm_listen(cm_id, service_id, 0); |
067b171b HE |
1028 | |
1029 | spin_unlock_irqrestore(&cm.lock, flags); | |
1030 | ||
1031 | if (err) { | |
1032 | ib_destroy_cm_id(cm_id); | |
1033 | return ERR_PTR(err); | |
1034 | } | |
1035 | return cm_id; | |
1036 | } | |
1037 | EXPORT_SYMBOL(ib_cm_insert_listen); | |
1038 | ||
97f52eb4 SH |
1039 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
1040 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
1041 | { |
1042 | u64 hi_tid, low_tid; | |
1043 | ||
1044 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
1045 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
1046 | (msg_seq << 30)); | |
a977049d HR |
1047 | return cpu_to_be64(hi_tid | low_tid); |
1048 | } | |
1049 | ||
1050 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 1051 | __be16 attr_id, __be64 tid) |
a977049d HR |
1052 | { |
1053 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
1054 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
1055 | hdr->class_version = IB_CM_CLASS_VERSION; | |
1056 | hdr->method = IB_MGMT_METHOD_SEND; | |
1057 | hdr->attr_id = attr_id; | |
1058 | hdr->tid = tid; | |
1059 | } | |
1060 | ||
1061 | static void cm_format_req(struct cm_req_msg *req_msg, | |
1062 | struct cm_id_private *cm_id_priv, | |
1063 | struct ib_cm_req_param *param) | |
1064 | { | |
3971c9f6 SH |
1065 | struct ib_sa_path_rec *pri_path = param->primary_path; |
1066 | struct ib_sa_path_rec *alt_path = param->alternate_path; | |
1067 | ||
a977049d HR |
1068 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
1069 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
1070 | ||
1071 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
1072 | req_msg->service_id = param->service_id; | |
e971b8cd | 1073 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1074 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
a977049d HR |
1075 | cm_req_set_init_depth(req_msg, param->initiator_depth); |
1076 | cm_req_set_remote_resp_timeout(req_msg, | |
1077 | param->remote_cm_response_timeout); | |
1078 | cm_req_set_qp_type(req_msg, param->qp_type); | |
1079 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
1080 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
1081 | cm_req_set_local_resp_timeout(req_msg, | |
1082 | param->local_cm_response_timeout); | |
a977049d HR |
1083 | req_msg->pkey = param->primary_path->pkey; |
1084 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
a977049d | 1085 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); |
d26a360b SH |
1086 | |
1087 | if (param->qp_type != IB_QPT_XRC_INI) { | |
1088 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
1089 | cm_req_set_retry_count(req_msg, param->retry_count); | |
1090 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
1091 | cm_req_set_srq(req_msg, param->srq); | |
1092 | } | |
a977049d | 1093 | |
3971c9f6 SH |
1094 | if (pri_path->hop_limit <= 1) { |
1095 | req_msg->primary_local_lid = pri_path->slid; | |
1096 | req_msg->primary_remote_lid = pri_path->dlid; | |
1097 | } else { | |
1098 | /* Work-around until there's a way to obtain remote LID info */ | |
1099 | req_msg->primary_local_lid = IB_LID_PERMISSIVE; | |
1100 | req_msg->primary_remote_lid = IB_LID_PERMISSIVE; | |
1101 | } | |
1102 | req_msg->primary_local_gid = pri_path->sgid; | |
1103 | req_msg->primary_remote_gid = pri_path->dgid; | |
1104 | cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); | |
1105 | cm_req_set_primary_packet_rate(req_msg, pri_path->rate); | |
1106 | req_msg->primary_traffic_class = pri_path->traffic_class; | |
1107 | req_msg->primary_hop_limit = pri_path->hop_limit; | |
1108 | cm_req_set_primary_sl(req_msg, pri_path->sl); | |
1109 | cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); | |
a977049d | 1110 | cm_req_set_primary_local_ack_timeout(req_msg, |
1d846126 | 1111 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1112 | pri_path->packet_life_time)); |
a977049d | 1113 | |
3971c9f6 SH |
1114 | if (alt_path) { |
1115 | if (alt_path->hop_limit <= 1) { | |
1116 | req_msg->alt_local_lid = alt_path->slid; | |
1117 | req_msg->alt_remote_lid = alt_path->dlid; | |
1118 | } else { | |
1119 | req_msg->alt_local_lid = IB_LID_PERMISSIVE; | |
1120 | req_msg->alt_remote_lid = IB_LID_PERMISSIVE; | |
1121 | } | |
1122 | req_msg->alt_local_gid = alt_path->sgid; | |
1123 | req_msg->alt_remote_gid = alt_path->dgid; | |
a977049d | 1124 | cm_req_set_alt_flow_label(req_msg, |
3971c9f6 SH |
1125 | alt_path->flow_label); |
1126 | cm_req_set_alt_packet_rate(req_msg, alt_path->rate); | |
1127 | req_msg->alt_traffic_class = alt_path->traffic_class; | |
1128 | req_msg->alt_hop_limit = alt_path->hop_limit; | |
1129 | cm_req_set_alt_sl(req_msg, alt_path->sl); | |
1130 | cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); | |
a977049d | 1131 | cm_req_set_alt_local_ack_timeout(req_msg, |
1d846126 | 1132 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1133 | alt_path->packet_life_time)); |
a977049d HR |
1134 | } |
1135 | ||
1136 | if (param->private_data && param->private_data_len) | |
1137 | memcpy(req_msg->private_data, param->private_data, | |
1138 | param->private_data_len); | |
1139 | } | |
1140 | ||
858119e1 | 1141 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
1142 | { |
1143 | /* peer-to-peer not supported */ | |
1144 | if (param->peer_to_peer) | |
1145 | return -EINVAL; | |
1146 | ||
1147 | if (!param->primary_path) | |
1148 | return -EINVAL; | |
1149 | ||
d26a360b SH |
1150 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC && |
1151 | param->qp_type != IB_QPT_XRC_INI) | |
a977049d HR |
1152 | return -EINVAL; |
1153 | ||
1154 | if (param->private_data && | |
1155 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
1156 | return -EINVAL; | |
1157 | ||
1158 | if (param->alternate_path && | |
1159 | (param->alternate_path->pkey != param->primary_path->pkey || | |
1160 | param->alternate_path->mtu != param->primary_path->mtu)) | |
1161 | return -EINVAL; | |
1162 | ||
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
1167 | struct ib_cm_req_param *param) | |
1168 | { | |
1169 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1170 | struct cm_req_msg *req_msg; |
1171 | unsigned long flags; | |
1172 | int ret; | |
1173 | ||
1174 | ret = cm_validate_req_param(param); | |
1175 | if (ret) | |
1176 | return ret; | |
1177 | ||
1178 | /* Verify that we're not in timewait. */ | |
1179 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1180 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1181 | if (cm_id->state != IB_CM_IDLE) { | |
1182 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1183 | ret = -EINVAL; | |
1184 | goto out; | |
1185 | } | |
1186 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1187 | ||
1188 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1189 | id.local_id); | |
75df23e2 SH |
1190 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1191 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 1192 | goto out; |
75df23e2 | 1193 | } |
a977049d HR |
1194 | |
1195 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
1196 | if (ret) | |
1197 | goto error1; | |
1198 | if (param->alternate_path) { | |
1199 | ret = cm_init_av_by_path(param->alternate_path, | |
1200 | &cm_id_priv->alt_av); | |
1201 | if (ret) | |
1202 | goto error1; | |
1203 | } | |
1204 | cm_id->service_id = param->service_id; | |
9c3da099 | 1205 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
1206 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1207 | param->primary_path->packet_life_time) * 2 + | |
1208 | cm_convert_to_ms( | |
1209 | param->remote_cm_response_timeout); | |
1210 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1211 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1212 | cm_id_priv->responder_resources = param->responder_resources; | |
1213 | cm_id_priv->retry_count = param->retry_count; | |
1214 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1215 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1216 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1217 | |
1218 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1219 | if (ret) | |
1220 | goto error1; | |
1221 | ||
1222 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1223 | cm_format_req(req_msg, cm_id_priv, param); | |
1224 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1225 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1226 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1227 | ||
1228 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1229 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
a977049d HR |
1230 | |
1231 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1232 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1233 | if (ret) { |
1234 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1235 | goto error2; | |
1236 | } | |
1237 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1238 | cm_id->state = IB_CM_REQ_SENT; | |
1239 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1240 | return 0; | |
1241 | ||
1242 | error2: cm_free_msg(cm_id_priv->msg); | |
1243 | error1: kfree(cm_id_priv->timewait_info); | |
1244 | out: return ret; | |
1245 | } | |
1246 | EXPORT_SYMBOL(ib_send_cm_req); | |
1247 | ||
1248 | static int cm_issue_rej(struct cm_port *port, | |
1249 | struct ib_mad_recv_wc *mad_recv_wc, | |
1250 | enum ib_cm_rej_reason reason, | |
1251 | enum cm_msg_response msg_rejected, | |
1252 | void *ari, u8 ari_length) | |
1253 | { | |
1254 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1255 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1256 | int ret; | |
1257 | ||
1258 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1259 | if (ret) | |
1260 | return ret; | |
1261 | ||
1262 | /* We just need common CM header information. Cast to any message. */ | |
1263 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1264 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1265 | ||
1266 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1267 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1268 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1269 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1270 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1271 | |
1272 | if (ari && ari_length) { | |
1273 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1274 | memcpy(rej_msg->ari, ari, ari_length); | |
1275 | } | |
1276 | ||
34816ad9 | 1277 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1278 | if (ret) |
1279 | cm_free_msg(msg); | |
1280 | ||
1281 | return ret; | |
1282 | } | |
1283 | ||
97f52eb4 SH |
1284 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1285 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1286 | { |
1287 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1288 | ((local_ca_guid == remote_ca_guid) && | |
1289 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1290 | } | |
1291 | ||
858119e1 | 1292 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1293 | struct ib_sa_path_rec *primary_path, |
1294 | struct ib_sa_path_rec *alt_path) | |
1295 | { | |
1296 | memset(primary_path, 0, sizeof *primary_path); | |
1297 | primary_path->dgid = req_msg->primary_local_gid; | |
1298 | primary_path->sgid = req_msg->primary_remote_gid; | |
1299 | primary_path->dlid = req_msg->primary_local_lid; | |
1300 | primary_path->slid = req_msg->primary_remote_lid; | |
1301 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1302 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1303 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1304 | primary_path->reversible = 1; | |
1305 | primary_path->pkey = req_msg->pkey; | |
1306 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1307 | primary_path->mtu_selector = IB_SA_EQ; | |
1308 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1309 | primary_path->rate_selector = IB_SA_EQ; | |
1310 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1311 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1312 | primary_path->packet_life_time = | |
1313 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1314 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
15865e7d | 1315 | primary_path->service_id = req_msg->service_id; |
a977049d HR |
1316 | |
1317 | if (req_msg->alt_local_lid) { | |
1318 | memset(alt_path, 0, sizeof *alt_path); | |
1319 | alt_path->dgid = req_msg->alt_local_gid; | |
1320 | alt_path->sgid = req_msg->alt_remote_gid; | |
1321 | alt_path->dlid = req_msg->alt_local_lid; | |
1322 | alt_path->slid = req_msg->alt_remote_lid; | |
1323 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1324 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1325 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1326 | alt_path->reversible = 1; | |
1327 | alt_path->pkey = req_msg->pkey; | |
1328 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1329 | alt_path->mtu_selector = IB_SA_EQ; | |
1330 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1331 | alt_path->rate_selector = IB_SA_EQ; | |
1332 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1333 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1334 | alt_path->packet_life_time = | |
1335 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1336 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
15865e7d | 1337 | alt_path->service_id = req_msg->service_id; |
a977049d HR |
1338 | } |
1339 | } | |
1340 | ||
24cad9a7 HE |
1341 | static u16 cm_get_bth_pkey(struct cm_work *work) |
1342 | { | |
1343 | struct ib_device *ib_dev = work->port->cm_dev->ib_device; | |
1344 | u8 port_num = work->port->port_num; | |
1345 | u16 pkey_index = work->mad_recv_wc->wc->pkey_index; | |
1346 | u16 pkey; | |
1347 | int ret; | |
1348 | ||
1349 | ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey); | |
1350 | if (ret) { | |
1351 | dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %d, pkey index %d). %d\n", | |
1352 | port_num, pkey_index, ret); | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | return pkey; | |
1357 | } | |
1358 | ||
a977049d HR |
1359 | static void cm_format_req_event(struct cm_work *work, |
1360 | struct cm_id_private *cm_id_priv, | |
1361 | struct ib_cm_id *listen_id) | |
1362 | { | |
1363 | struct cm_req_msg *req_msg; | |
1364 | struct ib_cm_req_event_param *param; | |
1365 | ||
1366 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1367 | param = &work->cm_event.param.req_rcvd; | |
1368 | param->listen_id = listen_id; | |
24cad9a7 | 1369 | param->bth_pkey = cm_get_bth_pkey(work); |
a977049d HR |
1370 | param->port = cm_id_priv->av.port->port_num; |
1371 | param->primary_path = &work->path[0]; | |
1372 | if (req_msg->alt_local_lid) | |
1373 | param->alternate_path = &work->path[1]; | |
1374 | else | |
1375 | param->alternate_path = NULL; | |
1376 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1377 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1378 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1379 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1380 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1381 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1382 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1383 | param->local_cm_response_timeout = | |
1384 | cm_req_get_remote_resp_timeout(req_msg); | |
1385 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1386 | param->remote_cm_response_timeout = | |
1387 | cm_req_get_local_resp_timeout(req_msg); | |
1388 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1389 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1390 | param->srq = cm_req_get_srq(req_msg); | |
1391 | work->cm_event.private_data = &req_msg->private_data; | |
1392 | } | |
1393 | ||
1394 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1395 | struct cm_work *work) | |
1396 | { | |
a977049d HR |
1397 | int ret; |
1398 | ||
1399 | /* We will typically only have the current event to report. */ | |
1400 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1401 | cm_free_work(work); | |
1402 | ||
1403 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1404 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1405 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1406 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1407 | BUG_ON(!work); |
1408 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1409 | &work->cm_event); | |
1410 | cm_free_work(work); | |
1411 | } | |
1412 | cm_deref_id(cm_id_priv); | |
1413 | if (ret) | |
04c33543 | 1414 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1415 | } |
1416 | ||
1417 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1418 | struct cm_id_private *cm_id_priv, | |
1419 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1420 | const void *private_data, u8 private_data_len) | |
1421 | { | |
1422 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1423 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1424 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1425 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1426 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1427 | ||
1428 | if (private_data && private_data_len) | |
1429 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1430 | } | |
1431 | ||
1432 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1433 | struct cm_id_private *cm_id_priv, | |
1434 | enum ib_cm_rej_reason reason, | |
1435 | void *ari, | |
1436 | u8 ari_length, | |
1437 | const void *private_data, | |
1438 | u8 private_data_len) | |
1439 | { | |
1440 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1441 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1442 | ||
1443 | switch(cm_id_priv->id.state) { | |
1444 | case IB_CM_REQ_RCVD: | |
1445 | rej_msg->local_comm_id = 0; | |
1446 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1447 | break; | |
1448 | case IB_CM_MRA_REQ_SENT: | |
1449 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1450 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1451 | break; | |
1452 | case IB_CM_REP_RCVD: | |
1453 | case IB_CM_MRA_REP_SENT: | |
1454 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1455 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1456 | break; | |
1457 | default: | |
1458 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1459 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1460 | break; | |
1461 | } | |
1462 | ||
97f52eb4 | 1463 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1464 | if (ari && ari_length) { |
1465 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1466 | memcpy(rej_msg->ari, ari, ari_length); | |
1467 | } | |
1468 | ||
1469 | if (private_data && private_data_len) | |
1470 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1471 | } | |
1472 | ||
1473 | static void cm_dup_req_handler(struct cm_work *work, | |
1474 | struct cm_id_private *cm_id_priv) | |
1475 | { | |
1476 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1477 | int ret; |
1478 | ||
9af57b7a SH |
1479 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1480 | counter[CM_REQ_COUNTER]); | |
1481 | ||
a977049d HR |
1482 | /* Quick state check to discard duplicate REQs. */ |
1483 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1484 | return; | |
1485 | ||
1486 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1487 | if (ret) | |
1488 | return; | |
1489 | ||
24be6e81 | 1490 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1491 | switch (cm_id_priv->id.state) { |
1492 | case IB_CM_MRA_REQ_SENT: | |
1493 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1494 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1495 | cm_id_priv->private_data, | |
1496 | cm_id_priv->private_data_len); | |
1497 | break; | |
1498 | case IB_CM_TIMEWAIT: | |
1499 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1500 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1501 | break; | |
1502 | default: | |
1503 | goto unlock; | |
1504 | } | |
24be6e81 | 1505 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1506 | |
34816ad9 | 1507 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1508 | if (ret) |
1509 | goto free; | |
1510 | return; | |
1511 | ||
24be6e81 | 1512 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1513 | free: cm_free_msg(msg); |
1514 | } | |
1515 | ||
1516 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1517 | struct cm_id_private *cm_id_priv) | |
1518 | { | |
1519 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1520 | struct cm_timewait_info *timewait_info; | |
1521 | struct cm_req_msg *req_msg; | |
a977049d HR |
1522 | |
1523 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1524 | ||
d998ccce | 1525 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1526 | spin_lock_irq(&cm.lock); |
a977049d | 1527 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d HR |
1528 | if (timewait_info) { |
1529 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1530 | timewait_info->work.remote_id); | |
24be6e81 | 1531 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1532 | if (cur_cm_id_priv) { |
1533 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1534 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1535 | } |
1536 | return NULL; | |
1537 | } | |
1538 | ||
1539 | /* Check for stale connections. */ | |
1540 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1541 | if (timewait_info) { | |
1542 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
24be6e81 | 1543 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1544 | cm_issue_rej(work->port, work->mad_recv_wc, |
1545 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1546 | NULL, 0); | |
1547 | return NULL; | |
a977049d HR |
1548 | } |
1549 | ||
1550 | /* Find matching listen request. */ | |
07d357d0 | 1551 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
73fec7fd | 1552 | req_msg->service_id); |
a977049d | 1553 | if (!listen_cm_id_priv) { |
8575329d | 1554 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
24be6e81 | 1555 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1556 | cm_issue_rej(work->port, work->mad_recv_wc, |
1557 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1558 | NULL, 0); | |
8575329d | 1559 | goto out; |
a977049d HR |
1560 | } |
1561 | atomic_inc(&listen_cm_id_priv->refcount); | |
1562 | atomic_inc(&cm_id_priv->refcount); | |
1563 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1564 | atomic_inc(&cm_id_priv->work_count); | |
24be6e81 | 1565 | spin_unlock_irq(&cm.lock); |
8575329d | 1566 | out: |
a977049d | 1567 | return listen_cm_id_priv; |
a977049d HR |
1568 | } |
1569 | ||
3971c9f6 SH |
1570 | /* |
1571 | * Work-around for inter-subnet connections. If the LIDs are permissive, | |
1572 | * we need to override the LID/SL data in the REQ with the LID information | |
1573 | * in the work completion. | |
1574 | */ | |
1575 | static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) | |
1576 | { | |
1577 | if (!cm_req_get_primary_subnet_local(req_msg)) { | |
1578 | if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { | |
1579 | req_msg->primary_local_lid = cpu_to_be16(wc->slid); | |
1580 | cm_req_set_primary_sl(req_msg, wc->sl); | |
1581 | } | |
1582 | ||
1583 | if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) | |
1584 | req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1585 | } | |
1586 | ||
1587 | if (!cm_req_get_alt_subnet_local(req_msg)) { | |
1588 | if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { | |
1589 | req_msg->alt_local_lid = cpu_to_be16(wc->slid); | |
1590 | cm_req_set_alt_sl(req_msg, wc->sl); | |
1591 | } | |
1592 | ||
1593 | if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) | |
1594 | req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1595 | } | |
1596 | } | |
1597 | ||
a977049d HR |
1598 | static int cm_req_handler(struct cm_work *work) |
1599 | { | |
1600 | struct ib_cm_id *cm_id; | |
1601 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1602 | struct cm_req_msg *req_msg; | |
1603 | int ret; | |
1604 | ||
1605 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1606 | ||
d4c4196f | 1607 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
1608 | if (IS_ERR(cm_id)) |
1609 | return PTR_ERR(cm_id); | |
1610 | ||
1611 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1612 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1613 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1614 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1615 | &cm_id_priv->av); |
1616 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1617 | id.local_id); | |
1618 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1619 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1620 | goto destroy; |
a977049d HR |
1621 | } |
1622 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1623 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1624 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1625 | ||
1626 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1627 | if (!listen_cm_id_priv) { | |
1628 | ret = -EINVAL; | |
76842405 SH |
1629 | kfree(cm_id_priv->timewait_info); |
1630 | goto destroy; | |
a977049d HR |
1631 | } |
1632 | ||
1633 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1634 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1635 | cm_id_priv->id.service_id = req_msg->service_id; | |
9c3da099 | 1636 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d | 1637 | |
3971c9f6 | 1638 | cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
a977049d | 1639 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
dd5f03be MB |
1640 | |
1641 | memcpy(work->path[0].dmac, cm_id_priv->av.ah_attr.dmac, ETH_ALEN); | |
1642 | work->path[0].vlan_id = cm_id_priv->av.ah_attr.vlan_id; | |
a977049d | 1643 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); |
76842405 | 1644 | if (ret) { |
d4c4196f | 1645 | ib_get_cached_gid(work->port->cm_dev->ib_device, |
76842405 SH |
1646 | work->port->port_num, 0, &work->path[0].sgid); |
1647 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1648 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1649 | NULL, 0); | |
1650 | goto rejected; | |
1651 | } | |
a977049d HR |
1652 | if (req_msg->alt_local_lid) { |
1653 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1654 | if (ret) { |
1655 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1656 | &work->path[0].sgid, | |
1657 | sizeof work->path[0].sgid, NULL, 0); | |
1658 | goto rejected; | |
1659 | } | |
a977049d HR |
1660 | } |
1661 | cm_id_priv->tid = req_msg->hdr.tid; | |
1662 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1663 | cm_req_get_local_resp_timeout(req_msg)); | |
1664 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1665 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1666 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1667 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1668 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
e1444b5a | 1669 | cm_id_priv->pkey = req_msg->pkey; |
a977049d | 1670 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
a977049d HR |
1671 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
1672 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1673 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1674 | |
1675 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1676 | cm_process_work(cm_id_priv, work); | |
1677 | cm_deref_id(listen_cm_id_priv); | |
1678 | return 0; | |
1679 | ||
76842405 SH |
1680 | rejected: |
1681 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1682 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1683 | destroy: |
1684 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1685 | return ret; |
1686 | } | |
1687 | ||
1688 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1689 | struct cm_id_private *cm_id_priv, | |
1690 | struct ib_cm_rep_param *param) | |
1691 | { | |
1692 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1693 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1694 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
a977049d HR |
1695 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); |
1696 | rep_msg->resp_resources = param->responder_resources; | |
1d846126 SH |
1697 | cm_rep_set_target_ack_delay(rep_msg, |
1698 | cm_id_priv->av.port->cm_dev->ack_delay); | |
a977049d | 1699 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
a977049d | 1700 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); |
e971b8cd | 1701 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1702 | |
d26a360b SH |
1703 | if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) { |
1704 | rep_msg->initiator_depth = param->initiator_depth; | |
1705 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1706 | cm_rep_set_srq(rep_msg, param->srq); | |
ef700446 | 1707 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1708 | } else { |
1709 | cm_rep_set_srq(rep_msg, 1); | |
ef700446 | 1710 | cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1711 | } |
1712 | ||
a977049d HR |
1713 | if (param->private_data && param->private_data_len) |
1714 | memcpy(rep_msg->private_data, param->private_data, | |
1715 | param->private_data_len); | |
1716 | } | |
1717 | ||
1718 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1719 | struct ib_cm_rep_param *param) | |
1720 | { | |
1721 | struct cm_id_private *cm_id_priv; | |
1722 | struct ib_mad_send_buf *msg; | |
1723 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1724 | unsigned long flags; |
1725 | int ret; | |
1726 | ||
1727 | if (param->private_data && | |
1728 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1729 | return -EINVAL; | |
1730 | ||
1731 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1732 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1733 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1734 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1735 | ret = -EINVAL; | |
1736 | goto out; | |
1737 | } | |
1738 | ||
1739 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1740 | if (ret) | |
1741 | goto out; | |
1742 | ||
1743 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1744 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1745 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1746 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
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 | return ret; | |
1753 | } | |
1754 | ||
1755 | cm_id->state = IB_CM_REP_SENT; | |
1756 | cm_id_priv->msg = msg; | |
1757 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1758 | cm_id_priv->responder_resources = param->responder_resources; | |
1759 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
ef700446 | 1760 | cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF); |
a977049d HR |
1761 | |
1762 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1763 | return ret; | |
1764 | } | |
1765 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1766 | ||
1767 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1768 | struct cm_id_private *cm_id_priv, | |
1769 | const void *private_data, | |
1770 | u8 private_data_len) | |
1771 | { | |
1772 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1773 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1774 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1775 | ||
1776 | if (private_data && private_data_len) | |
1777 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1778 | } | |
1779 | ||
1780 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1781 | const void *private_data, | |
1782 | u8 private_data_len) | |
1783 | { | |
1784 | struct cm_id_private *cm_id_priv; | |
1785 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1786 | unsigned long flags; |
1787 | void *data; | |
1788 | int ret; | |
1789 | ||
1790 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1791 | return -EINVAL; | |
1792 | ||
1793 | data = cm_copy_private_data(private_data, private_data_len); | |
1794 | if (IS_ERR(data)) | |
1795 | return PTR_ERR(data); | |
1796 | ||
1797 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1798 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1799 | if (cm_id->state != IB_CM_REP_RCVD && | |
1800 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1801 | ret = -EINVAL; | |
1802 | goto error; | |
1803 | } | |
1804 | ||
1805 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1806 | if (ret) | |
1807 | goto error; | |
1808 | ||
1809 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1810 | private_data, private_data_len); | |
1811 | ||
34816ad9 | 1812 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1813 | if (ret) { |
1814 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1815 | cm_free_msg(msg); | |
1816 | kfree(data); | |
1817 | return ret; | |
1818 | } | |
1819 | ||
1820 | cm_id->state = IB_CM_ESTABLISHED; | |
1821 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1822 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1823 | return 0; | |
1824 | ||
1825 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1826 | kfree(data); | |
1827 | return ret; | |
1828 | } | |
1829 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1830 | ||
ef700446 | 1831 | static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type) |
a977049d HR |
1832 | { |
1833 | struct cm_rep_msg *rep_msg; | |
1834 | struct ib_cm_rep_event_param *param; | |
1835 | ||
1836 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1837 | param = &work->cm_event.param.rep_rcvd; | |
1838 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1839 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
ef700446 | 1840 | param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type)); |
a977049d HR |
1841 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); |
1842 | param->responder_resources = rep_msg->initiator_depth; | |
1843 | param->initiator_depth = rep_msg->resp_resources; | |
1844 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1845 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1846 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1847 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1848 | param->srq = cm_rep_get_srq(rep_msg); | |
1849 | work->cm_event.private_data = &rep_msg->private_data; | |
1850 | } | |
1851 | ||
1852 | static void cm_dup_rep_handler(struct cm_work *work) | |
1853 | { | |
1854 | struct cm_id_private *cm_id_priv; | |
1855 | struct cm_rep_msg *rep_msg; | |
1856 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1857 | int ret; |
1858 | ||
1859 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1860 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1861 | rep_msg->local_comm_id); | |
1862 | if (!cm_id_priv) | |
1863 | return; | |
1864 | ||
9af57b7a SH |
1865 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1866 | counter[CM_REP_COUNTER]); | |
a977049d HR |
1867 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
1868 | if (ret) | |
1869 | goto deref; | |
1870 | ||
24be6e81 | 1871 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1872 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
1873 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1874 | cm_id_priv->private_data, | |
1875 | cm_id_priv->private_data_len); | |
1876 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1877 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1878 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1879 | cm_id_priv->private_data, | |
1880 | cm_id_priv->private_data_len); | |
1881 | else | |
1882 | goto unlock; | |
24be6e81 | 1883 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1884 | |
34816ad9 | 1885 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1886 | if (ret) |
1887 | goto free; | |
1888 | goto deref; | |
1889 | ||
24be6e81 | 1890 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1891 | free: cm_free_msg(msg); |
1892 | deref: cm_deref_id(cm_id_priv); | |
1893 | } | |
1894 | ||
1895 | static int cm_rep_handler(struct cm_work *work) | |
1896 | { | |
1897 | struct cm_id_private *cm_id_priv; | |
1898 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1899 | int ret; |
1900 | ||
1901 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1902 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1903 | if (!cm_id_priv) { | |
1904 | cm_dup_rep_handler(work); | |
1905 | return -EINVAL; | |
1906 | } | |
1907 | ||
ef700446 | 1908 | cm_format_rep_event(work, cm_id_priv->qp_type); |
87fd1a11 | 1909 | |
24be6e81 | 1910 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1911 | switch (cm_id_priv->id.state) { |
1912 | case IB_CM_REQ_SENT: | |
1913 | case IB_CM_MRA_REQ_RCVD: | |
1914 | break; | |
1915 | default: | |
24be6e81 | 1916 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1917 | ret = -EINVAL; |
1918 | goto error; | |
1919 | } | |
1920 | ||
a977049d HR |
1921 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1922 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
ef700446 | 1923 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d | 1924 | |
87fd1a11 | 1925 | spin_lock(&cm.lock); |
a977049d HR |
1926 | /* Check for duplicate REP. */ |
1927 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 1928 | spin_unlock(&cm.lock); |
24be6e81 | 1929 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1930 | ret = -EINVAL; |
1931 | goto error; | |
1932 | } | |
1933 | /* Check for a stale connection. */ | |
1934 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1935 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1936 | &cm.remote_id_table); | |
1937 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1938 | spin_unlock(&cm.lock); | |
24be6e81 | 1939 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1940 | cm_issue_rej(work->port, work->mad_recv_wc, |
1941 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1942 | NULL, 0); | |
1943 | ret = -EINVAL; | |
1944 | goto error; | |
1945 | } | |
87fd1a11 | 1946 | spin_unlock(&cm.lock); |
a977049d | 1947 | |
a977049d HR |
1948 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1949 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
ef700446 | 1950 | cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d HR |
1951 | cm_id_priv->initiator_depth = rep_msg->resp_resources; |
1952 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1953 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1954 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1d846126 SH |
1955 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
1956 | cm_id_priv->av.timeout = | |
1957 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1958 | cm_id_priv->av.timeout - 1); | |
1959 | cm_id_priv->alt_av.timeout = | |
1960 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1961 | cm_id_priv->alt_av.timeout - 1); | |
a977049d HR |
1962 | |
1963 | /* todo: handle peer_to_peer */ | |
1964 | ||
34816ad9 | 1965 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1966 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1967 | if (!ret) | |
1968 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1969 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1970 | |
1971 | if (ret) | |
1972 | cm_process_work(cm_id_priv, work); | |
1973 | else | |
1974 | cm_deref_id(cm_id_priv); | |
1975 | return 0; | |
1976 | ||
87fd1a11 | 1977 | error: |
a977049d HR |
1978 | cm_deref_id(cm_id_priv); |
1979 | return ret; | |
1980 | } | |
1981 | ||
1982 | static int cm_establish_handler(struct cm_work *work) | |
1983 | { | |
1984 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1985 | int ret; |
1986 | ||
e1444b5a | 1987 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
1988 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
1989 | if (!cm_id_priv) | |
1990 | return -EINVAL; | |
1991 | ||
24be6e81 | 1992 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1993 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 1994 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1995 | goto out; |
1996 | } | |
1997 | ||
34816ad9 | 1998 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1999 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2000 | if (!ret) | |
2001 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2002 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2003 | |
2004 | if (ret) | |
2005 | cm_process_work(cm_id_priv, work); | |
2006 | else | |
2007 | cm_deref_id(cm_id_priv); | |
2008 | return 0; | |
2009 | out: | |
2010 | cm_deref_id(cm_id_priv); | |
2011 | return -EINVAL; | |
2012 | } | |
2013 | ||
2014 | static int cm_rtu_handler(struct cm_work *work) | |
2015 | { | |
2016 | struct cm_id_private *cm_id_priv; | |
2017 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
2018 | int ret; |
2019 | ||
2020 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
2021 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
2022 | rtu_msg->local_comm_id); | |
2023 | if (!cm_id_priv) | |
2024 | return -EINVAL; | |
2025 | ||
2026 | work->cm_event.private_data = &rtu_msg->private_data; | |
2027 | ||
24be6e81 | 2028 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2029 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
2030 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 2031 | spin_unlock_irq(&cm_id_priv->lock); |
9af57b7a SH |
2032 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2033 | counter[CM_RTU_COUNTER]); | |
a977049d HR |
2034 | goto out; |
2035 | } | |
2036 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
2037 | ||
34816ad9 | 2038 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2039 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2040 | if (!ret) | |
2041 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2042 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2043 | |
2044 | if (ret) | |
2045 | cm_process_work(cm_id_priv, work); | |
2046 | else | |
2047 | cm_deref_id(cm_id_priv); | |
2048 | return 0; | |
2049 | out: | |
2050 | cm_deref_id(cm_id_priv); | |
2051 | return -EINVAL; | |
2052 | } | |
2053 | ||
2054 | static void cm_format_dreq(struct cm_dreq_msg *dreq_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(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
2060 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
2061 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
2062 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2063 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
2064 | ||
2065 | if (private_data && private_data_len) | |
2066 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
2067 | } | |
2068 | ||
2069 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
2070 | const void *private_data, | |
2071 | u8 private_data_len) | |
2072 | { | |
2073 | struct cm_id_private *cm_id_priv; | |
2074 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2075 | unsigned long flags; |
2076 | int ret; | |
2077 | ||
2078 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
2079 | return -EINVAL; | |
2080 | ||
2081 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2082 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2083 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
2084 | ret = -EINVAL; | |
2085 | goto out; | |
2086 | } | |
2087 | ||
8d8ac865 SH |
2088 | if (cm_id->lap_state == IB_CM_LAP_SENT || |
2089 | cm_id->lap_state == IB_CM_MRA_LAP_RCVD) | |
2090 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2091 | ||
a977049d HR |
2092 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2093 | if (ret) { | |
2094 | cm_enter_timewait(cm_id_priv); | |
2095 | goto out; | |
2096 | } | |
2097 | ||
2098 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
2099 | private_data, private_data_len); | |
34816ad9 | 2100 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2101 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
2102 | ||
34816ad9 | 2103 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2104 | if (ret) { |
2105 | cm_enter_timewait(cm_id_priv); | |
2106 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2107 | cm_free_msg(msg); | |
2108 | return ret; | |
2109 | } | |
2110 | ||
2111 | cm_id->state = IB_CM_DREQ_SENT; | |
2112 | cm_id_priv->msg = msg; | |
2113 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2114 | return ret; | |
2115 | } | |
2116 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
2117 | ||
2118 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
2119 | struct cm_id_private *cm_id_priv, | |
2120 | const void *private_data, | |
2121 | u8 private_data_len) | |
2122 | { | |
2123 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
2124 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
2125 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2126 | ||
2127 | if (private_data && private_data_len) | |
2128 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
2129 | } | |
2130 | ||
2131 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
2132 | const void *private_data, | |
2133 | u8 private_data_len) | |
2134 | { | |
2135 | struct cm_id_private *cm_id_priv; | |
2136 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2137 | unsigned long flags; |
2138 | void *data; | |
2139 | int ret; | |
2140 | ||
2141 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
2142 | return -EINVAL; | |
2143 | ||
2144 | data = cm_copy_private_data(private_data, private_data_len); | |
2145 | if (IS_ERR(data)) | |
2146 | return PTR_ERR(data); | |
2147 | ||
2148 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2149 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2150 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
2151 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2152 | kfree(data); | |
2153 | return -EINVAL; | |
2154 | } | |
2155 | ||
2156 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2157 | cm_enter_timewait(cm_id_priv); | |
2158 | ||
2159 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2160 | if (ret) | |
2161 | goto out; | |
2162 | ||
2163 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2164 | private_data, private_data_len); | |
2165 | ||
34816ad9 | 2166 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2167 | if (ret) { |
2168 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2169 | cm_free_msg(msg); | |
2170 | return ret; | |
2171 | } | |
2172 | ||
2173 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2174 | return ret; | |
2175 | } | |
2176 | EXPORT_SYMBOL(ib_send_cm_drep); | |
2177 | ||
82a9c16a SH |
2178 | static int cm_issue_drep(struct cm_port *port, |
2179 | struct ib_mad_recv_wc *mad_recv_wc) | |
2180 | { | |
2181 | struct ib_mad_send_buf *msg = NULL; | |
2182 | struct cm_dreq_msg *dreq_msg; | |
2183 | struct cm_drep_msg *drep_msg; | |
2184 | int ret; | |
2185 | ||
2186 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
2187 | if (ret) | |
2188 | return ret; | |
2189 | ||
2190 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
2191 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
2192 | ||
2193 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
2194 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
2195 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
2196 | ||
2197 | ret = ib_post_send_mad(msg, NULL); | |
2198 | if (ret) | |
2199 | cm_free_msg(msg); | |
2200 | ||
2201 | return ret; | |
2202 | } | |
2203 | ||
a977049d HR |
2204 | static int cm_dreq_handler(struct cm_work *work) |
2205 | { | |
2206 | struct cm_id_private *cm_id_priv; | |
2207 | struct cm_dreq_msg *dreq_msg; | |
2208 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2209 | int ret; |
2210 | ||
2211 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
2212 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
2213 | dreq_msg->local_comm_id); | |
82a9c16a | 2214 | if (!cm_id_priv) { |
9af57b7a SH |
2215 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2216 | counter[CM_DREQ_COUNTER]); | |
82a9c16a | 2217 | cm_issue_drep(work->port, work->mad_recv_wc); |
a977049d | 2218 | return -EINVAL; |
82a9c16a | 2219 | } |
a977049d HR |
2220 | |
2221 | work->cm_event.private_data = &dreq_msg->private_data; | |
2222 | ||
24be6e81 | 2223 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2224 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
2225 | goto unlock; | |
2226 | ||
2227 | switch (cm_id_priv->id.state) { | |
2228 | case IB_CM_REP_SENT: | |
2229 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2230 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2231 | break; |
2232 | case IB_CM_ESTABLISHED: | |
8d8ac865 SH |
2233 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || |
2234 | cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2235 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2236 | break; | |
a977049d HR |
2237 | case IB_CM_MRA_REP_RCVD: |
2238 | break; | |
2239 | case IB_CM_TIMEWAIT: | |
9af57b7a SH |
2240 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2241 | counter[CM_DREQ_COUNTER]); | |
a977049d HR |
2242 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2243 | goto unlock; | |
2244 | ||
2245 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2246 | cm_id_priv->private_data, | |
2247 | cm_id_priv->private_data_len); | |
24be6e81 | 2248 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2249 | |
34816ad9 | 2250 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2251 | cm_free_msg(msg); |
2252 | goto deref; | |
9af57b7a SH |
2253 | case IB_CM_DREQ_RCVD: |
2254 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2255 | counter[CM_DREQ_COUNTER]); | |
2256 | goto unlock; | |
a977049d HR |
2257 | default: |
2258 | goto unlock; | |
2259 | } | |
2260 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
2261 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
2262 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2263 | if (!ret) | |
2264 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2265 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2266 | |
2267 | if (ret) | |
2268 | cm_process_work(cm_id_priv, work); | |
2269 | else | |
2270 | cm_deref_id(cm_id_priv); | |
2271 | return 0; | |
2272 | ||
24be6e81 | 2273 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2274 | deref: cm_deref_id(cm_id_priv); |
2275 | return -EINVAL; | |
2276 | } | |
2277 | ||
2278 | static int cm_drep_handler(struct cm_work *work) | |
2279 | { | |
2280 | struct cm_id_private *cm_id_priv; | |
2281 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2282 | int ret; |
2283 | ||
2284 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2285 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2286 | drep_msg->local_comm_id); | |
2287 | if (!cm_id_priv) | |
2288 | return -EINVAL; | |
2289 | ||
2290 | work->cm_event.private_data = &drep_msg->private_data; | |
2291 | ||
24be6e81 | 2292 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2293 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2294 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2295 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2296 | goto out; |
2297 | } | |
2298 | cm_enter_timewait(cm_id_priv); | |
2299 | ||
34816ad9 | 2300 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2301 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2302 | if (!ret) | |
2303 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2304 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2305 | |
2306 | if (ret) | |
2307 | cm_process_work(cm_id_priv, work); | |
2308 | else | |
2309 | cm_deref_id(cm_id_priv); | |
2310 | return 0; | |
2311 | out: | |
2312 | cm_deref_id(cm_id_priv); | |
2313 | return -EINVAL; | |
2314 | } | |
2315 | ||
2316 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2317 | enum ib_cm_rej_reason reason, | |
2318 | void *ari, | |
2319 | u8 ari_length, | |
2320 | const void *private_data, | |
2321 | u8 private_data_len) | |
2322 | { | |
2323 | struct cm_id_private *cm_id_priv; | |
2324 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2325 | unsigned long flags; |
2326 | int ret; | |
2327 | ||
2328 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2329 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2330 | return -EINVAL; | |
2331 | ||
2332 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2333 | ||
2334 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2335 | switch (cm_id->state) { | |
2336 | case IB_CM_REQ_SENT: | |
2337 | case IB_CM_MRA_REQ_RCVD: | |
2338 | case IB_CM_REQ_RCVD: | |
2339 | case IB_CM_MRA_REQ_SENT: | |
2340 | case IB_CM_REP_RCVD: | |
2341 | case IB_CM_MRA_REP_SENT: | |
2342 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2343 | if (!ret) | |
2344 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2345 | cm_id_priv, reason, ari, ari_length, | |
2346 | private_data, private_data_len); | |
2347 | ||
2348 | cm_reset_to_idle(cm_id_priv); | |
2349 | break; | |
2350 | case IB_CM_REP_SENT: | |
2351 | case IB_CM_MRA_REP_RCVD: | |
2352 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2353 | if (!ret) | |
2354 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2355 | cm_id_priv, reason, ari, ari_length, | |
2356 | private_data, private_data_len); | |
2357 | ||
2358 | cm_enter_timewait(cm_id_priv); | |
2359 | break; | |
2360 | default: | |
2361 | ret = -EINVAL; | |
2362 | goto out; | |
2363 | } | |
2364 | ||
2365 | if (ret) | |
2366 | goto out; | |
2367 | ||
34816ad9 | 2368 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2369 | if (ret) |
2370 | cm_free_msg(msg); | |
2371 | ||
2372 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2373 | return ret; | |
2374 | } | |
2375 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2376 | ||
2377 | static void cm_format_rej_event(struct cm_work *work) | |
2378 | { | |
2379 | struct cm_rej_msg *rej_msg; | |
2380 | struct ib_cm_rej_event_param *param; | |
2381 | ||
2382 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2383 | param = &work->cm_event.param.rej_rcvd; | |
2384 | param->ari = rej_msg->ari; | |
2385 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2386 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2387 | work->cm_event.private_data = &rej_msg->private_data; |
2388 | } | |
2389 | ||
2390 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2391 | { | |
2392 | struct cm_timewait_info *timewait_info; | |
2393 | struct cm_id_private *cm_id_priv; | |
97f52eb4 | 2394 | __be32 remote_id; |
a977049d HR |
2395 | |
2396 | remote_id = rej_msg->local_comm_id; | |
2397 | ||
97f52eb4 | 2398 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
24be6e81 | 2399 | spin_lock_irq(&cm.lock); |
97f52eb4 | 2400 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2401 | remote_id); |
2402 | if (!timewait_info) { | |
24be6e81 | 2403 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2404 | return NULL; |
2405 | } | |
f06d2653 SH |
2406 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2407 | (timewait_info->work.local_id ^ | |
2408 | cm.random_id_operand)); | |
a977049d HR |
2409 | if (cm_id_priv) { |
2410 | if (cm_id_priv->id.remote_id == remote_id) | |
2411 | atomic_inc(&cm_id_priv->refcount); | |
2412 | else | |
2413 | cm_id_priv = NULL; | |
2414 | } | |
24be6e81 | 2415 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2416 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
2417 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2418 | else | |
2419 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2420 | ||
2421 | return cm_id_priv; | |
2422 | } | |
2423 | ||
2424 | static int cm_rej_handler(struct cm_work *work) | |
2425 | { | |
2426 | struct cm_id_private *cm_id_priv; | |
2427 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
2428 | int ret; |
2429 | ||
2430 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2431 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2432 | if (!cm_id_priv) | |
2433 | return -EINVAL; | |
2434 | ||
2435 | cm_format_rej_event(work); | |
2436 | ||
24be6e81 | 2437 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2438 | switch (cm_id_priv->id.state) { |
2439 | case IB_CM_REQ_SENT: | |
2440 | case IB_CM_MRA_REQ_RCVD: | |
2441 | case IB_CM_REP_SENT: | |
2442 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2443 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2444 | /* fall through */ |
2445 | case IB_CM_REQ_RCVD: | |
2446 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2447 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2448 | cm_enter_timewait(cm_id_priv); |
2449 | else | |
2450 | cm_reset_to_idle(cm_id_priv); | |
2451 | break; | |
2452 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2453 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2454 | /* fall through */ |
2455 | case IB_CM_REP_RCVD: | |
2456 | case IB_CM_MRA_REP_SENT: | |
a977049d HR |
2457 | cm_enter_timewait(cm_id_priv); |
2458 | break; | |
8d8ac865 SH |
2459 | case IB_CM_ESTABLISHED: |
2460 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT || | |
2461 | cm_id_priv->id.lap_state == IB_CM_LAP_SENT) { | |
2462 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT) | |
2463 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2464 | cm_id_priv->msg); | |
2465 | cm_enter_timewait(cm_id_priv); | |
2466 | break; | |
2467 | } | |
2468 | /* fall through */ | |
a977049d | 2469 | default: |
24be6e81 | 2470 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2471 | ret = -EINVAL; |
2472 | goto out; | |
2473 | } | |
2474 | ||
2475 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2476 | if (!ret) | |
2477 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2478 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2479 | |
2480 | if (ret) | |
2481 | cm_process_work(cm_id_priv, work); | |
2482 | else | |
2483 | cm_deref_id(cm_id_priv); | |
2484 | return 0; | |
2485 | out: | |
2486 | cm_deref_id(cm_id_priv); | |
2487 | return -EINVAL; | |
2488 | } | |
2489 | ||
2490 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2491 | u8 service_timeout, | |
2492 | const void *private_data, | |
2493 | u8 private_data_len) | |
2494 | { | |
2495 | struct cm_id_private *cm_id_priv; | |
2496 | struct ib_mad_send_buf *msg; | |
de98b693 SH |
2497 | enum ib_cm_state cm_state; |
2498 | enum ib_cm_lap_state lap_state; | |
2499 | enum cm_msg_response msg_response; | |
a977049d HR |
2500 | void *data; |
2501 | unsigned long flags; | |
2502 | int ret; | |
2503 | ||
2504 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2505 | return -EINVAL; | |
2506 | ||
2507 | data = cm_copy_private_data(private_data, private_data_len); | |
2508 | if (IS_ERR(data)) | |
2509 | return PTR_ERR(data); | |
2510 | ||
2511 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2512 | ||
2513 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2514 | switch(cm_id_priv->id.state) { | |
2515 | case IB_CM_REQ_RCVD: | |
de98b693 SH |
2516 | cm_state = IB_CM_MRA_REQ_SENT; |
2517 | lap_state = cm_id->lap_state; | |
2518 | msg_response = CM_MSG_RESPONSE_REQ; | |
a977049d HR |
2519 | break; |
2520 | case IB_CM_REP_RCVD: | |
de98b693 SH |
2521 | cm_state = IB_CM_MRA_REP_SENT; |
2522 | lap_state = cm_id->lap_state; | |
2523 | msg_response = CM_MSG_RESPONSE_REP; | |
a977049d HR |
2524 | break; |
2525 | case IB_CM_ESTABLISHED: | |
50a025c6 SH |
2526 | if (cm_id->lap_state == IB_CM_LAP_RCVD) { |
2527 | cm_state = cm_id->state; | |
2528 | lap_state = IB_CM_MRA_LAP_SENT; | |
2529 | msg_response = CM_MSG_RESPONSE_OTHER; | |
2530 | break; | |
2531 | } | |
de98b693 SH |
2532 | default: |
2533 | ret = -EINVAL; | |
2534 | goto error1; | |
2535 | } | |
2536 | ||
2537 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { | |
a977049d HR |
2538 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2539 | if (ret) | |
2540 | goto error1; | |
2541 | ||
2542 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
de98b693 | 2543 | msg_response, service_timeout, |
a977049d | 2544 | private_data, private_data_len); |
34816ad9 | 2545 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2546 | if (ret) |
2547 | goto error2; | |
a977049d | 2548 | } |
de98b693 SH |
2549 | |
2550 | cm_id->state = cm_state; | |
2551 | cm_id->lap_state = lap_state; | |
a977049d HR |
2552 | cm_id_priv->service_timeout = service_timeout; |
2553 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2554 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2555 | return 0; | |
2556 | ||
2557 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2558 | kfree(data); | |
2559 | return ret; | |
2560 | ||
2561 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2562 | kfree(data); | |
2563 | cm_free_msg(msg); | |
2564 | return ret; | |
2565 | } | |
2566 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2567 | ||
2568 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2569 | { | |
2570 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2571 | case CM_MSG_RESPONSE_REQ: | |
2572 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2573 | case CM_MSG_RESPONSE_REP: | |
2574 | case CM_MSG_RESPONSE_OTHER: | |
2575 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2576 | mra_msg->local_comm_id); | |
2577 | default: | |
2578 | return NULL; | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | static int cm_mra_handler(struct cm_work *work) | |
2583 | { | |
2584 | struct cm_id_private *cm_id_priv; | |
2585 | struct cm_mra_msg *mra_msg; | |
a977049d HR |
2586 | int timeout, ret; |
2587 | ||
2588 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2589 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2590 | if (!cm_id_priv) | |
2591 | return -EINVAL; | |
2592 | ||
2593 | work->cm_event.private_data = &mra_msg->private_data; | |
2594 | work->cm_event.param.mra_rcvd.service_timeout = | |
2595 | cm_mra_get_service_timeout(mra_msg); | |
2596 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
1d846126 | 2597 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 2598 | |
24be6e81 | 2599 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2600 | switch (cm_id_priv->id.state) { |
2601 | case IB_CM_REQ_SENT: | |
2602 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2603 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2604 | cm_id_priv->msg, timeout)) |
a977049d HR |
2605 | goto out; |
2606 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2607 | break; | |
2608 | case IB_CM_REP_SENT: | |
2609 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2610 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2611 | cm_id_priv->msg, timeout)) |
a977049d HR |
2612 | goto out; |
2613 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2614 | break; | |
2615 | case IB_CM_ESTABLISHED: | |
2616 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2617 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2618 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
9af57b7a SH |
2619 | cm_id_priv->msg, timeout)) { |
2620 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2621 | atomic_long_inc(&work->port-> | |
2622 | counter_group[CM_RECV_DUPLICATES]. | |
2623 | counter[CM_MRA_COUNTER]); | |
a977049d | 2624 | goto out; |
9af57b7a | 2625 | } |
a977049d HR |
2626 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
2627 | break; | |
9af57b7a SH |
2628 | case IB_CM_MRA_REQ_RCVD: |
2629 | case IB_CM_MRA_REP_RCVD: | |
2630 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2631 | counter[CM_MRA_COUNTER]); | |
2632 | /* fall through */ | |
a977049d HR |
2633 | default: |
2634 | goto out; | |
2635 | } | |
2636 | ||
2637 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2638 | cm_id_priv->id.state; | |
2639 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2640 | if (!ret) | |
2641 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2642 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2643 | |
2644 | if (ret) | |
2645 | cm_process_work(cm_id_priv, work); | |
2646 | else | |
2647 | cm_deref_id(cm_id_priv); | |
2648 | return 0; | |
2649 | out: | |
24be6e81 | 2650 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2651 | cm_deref_id(cm_id_priv); |
2652 | return -EINVAL; | |
2653 | } | |
2654 | ||
2655 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2656 | struct cm_id_private *cm_id_priv, | |
2657 | struct ib_sa_path_rec *alternate_path, | |
2658 | const void *private_data, | |
2659 | u8 private_data_len) | |
2660 | { | |
2661 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2662 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2663 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2664 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2665 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2666 | /* todo: need remote CM response timeout */ | |
2667 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2668 | lap_msg->alt_local_lid = alternate_path->slid; | |
2669 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2670 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2671 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2672 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2673 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2674 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2675 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2676 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2677 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2678 | cm_lap_set_local_ack_timeout(lap_msg, | |
1d846126 SH |
2679 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
2680 | alternate_path->packet_life_time)); | |
a977049d HR |
2681 | |
2682 | if (private_data && private_data_len) | |
2683 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2684 | } | |
2685 | ||
2686 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2687 | struct ib_sa_path_rec *alternate_path, | |
2688 | const void *private_data, | |
2689 | u8 private_data_len) | |
2690 | { | |
2691 | struct cm_id_private *cm_id_priv; | |
2692 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2693 | unsigned long flags; |
2694 | int ret; | |
2695 | ||
2696 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2697 | return -EINVAL; | |
2698 | ||
2699 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2700 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2701 | if (cm_id->state != IB_CM_ESTABLISHED || | |
e1444b5a SH |
2702 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
2703 | cm_id->lap_state != IB_CM_LAP_IDLE)) { | |
a977049d HR |
2704 | ret = -EINVAL; |
2705 | goto out; | |
2706 | } | |
2707 | ||
e1444b5a SH |
2708 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
2709 | if (ret) | |
2710 | goto out; | |
1d846126 SH |
2711 | cm_id_priv->alt_av.timeout = |
2712 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2713 | cm_id_priv->alt_av.timeout - 1); | |
e1444b5a | 2714 | |
a977049d HR |
2715 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2716 | if (ret) | |
2717 | goto out; | |
2718 | ||
2719 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2720 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2721 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2722 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2723 | ||
34816ad9 | 2724 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2725 | if (ret) { |
2726 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2727 | cm_free_msg(msg); | |
2728 | return ret; | |
2729 | } | |
2730 | ||
2731 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2732 | cm_id_priv->msg = msg; | |
2733 | ||
2734 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2735 | return ret; | |
2736 | } | |
2737 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2738 | ||
e1444b5a SH |
2739 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
2740 | struct ib_sa_path_rec *path, | |
a977049d HR |
2741 | struct cm_lap_msg *lap_msg) |
2742 | { | |
2743 | memset(path, 0, sizeof *path); | |
2744 | path->dgid = lap_msg->alt_local_gid; | |
2745 | path->sgid = lap_msg->alt_remote_gid; | |
2746 | path->dlid = lap_msg->alt_local_lid; | |
2747 | path->slid = lap_msg->alt_remote_lid; | |
2748 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2749 | path->hop_limit = lap_msg->alt_hop_limit; | |
2750 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2751 | path->reversible = 1; | |
e1444b5a | 2752 | path->pkey = cm_id_priv->pkey; |
a977049d HR |
2753 | path->sl = cm_lap_get_sl(lap_msg); |
2754 | path->mtu_selector = IB_SA_EQ; | |
e1444b5a | 2755 | path->mtu = cm_id_priv->path_mtu; |
a977049d HR |
2756 | path->rate_selector = IB_SA_EQ; |
2757 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2758 | path->packet_life_time_selector = IB_SA_EQ; | |
2759 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2760 | path->packet_life_time -= (path->packet_life_time > 0); | |
2761 | } | |
2762 | ||
2763 | static int cm_lap_handler(struct cm_work *work) | |
2764 | { | |
2765 | struct cm_id_private *cm_id_priv; | |
2766 | struct cm_lap_msg *lap_msg; | |
2767 | struct ib_cm_lap_event_param *param; | |
2768 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2769 | int ret; |
2770 | ||
2771 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2772 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2773 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2774 | lap_msg->local_comm_id); | |
2775 | if (!cm_id_priv) | |
2776 | return -EINVAL; | |
2777 | ||
2778 | param = &work->cm_event.param.lap_rcvd; | |
2779 | param->alternate_path = &work->path[0]; | |
e1444b5a | 2780 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
a977049d HR |
2781 | work->cm_event.private_data = &lap_msg->private_data; |
2782 | ||
24be6e81 | 2783 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2784 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
2785 | goto unlock; | |
2786 | ||
2787 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 2788 | case IB_CM_LAP_UNINIT: |
a977049d HR |
2789 | case IB_CM_LAP_IDLE: |
2790 | break; | |
2791 | case IB_CM_MRA_LAP_SENT: | |
9af57b7a SH |
2792 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2793 | counter[CM_LAP_COUNTER]); | |
a977049d HR |
2794 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2795 | goto unlock; | |
2796 | ||
2797 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2798 | CM_MSG_RESPONSE_OTHER, | |
2799 | cm_id_priv->service_timeout, | |
2800 | cm_id_priv->private_data, | |
2801 | cm_id_priv->private_data_len); | |
24be6e81 | 2802 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2803 | |
34816ad9 | 2804 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2805 | cm_free_msg(msg); |
2806 | goto deref; | |
9af57b7a SH |
2807 | case IB_CM_LAP_RCVD: |
2808 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2809 | counter[CM_LAP_COUNTER]); | |
2810 | goto unlock; | |
a977049d HR |
2811 | default: |
2812 | goto unlock; | |
2813 | } | |
2814 | ||
2815 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2816 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e1444b5a SH |
2817 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2818 | work->mad_recv_wc->recv_buf.grh, | |
2819 | &cm_id_priv->av); | |
2820 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); | |
a977049d HR |
2821 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2822 | if (!ret) | |
2823 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2824 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2825 | |
2826 | if (ret) | |
2827 | cm_process_work(cm_id_priv, work); | |
2828 | else | |
2829 | cm_deref_id(cm_id_priv); | |
2830 | return 0; | |
2831 | ||
24be6e81 | 2832 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2833 | deref: cm_deref_id(cm_id_priv); |
2834 | return -EINVAL; | |
2835 | } | |
2836 | ||
2837 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2838 | struct cm_id_private *cm_id_priv, | |
2839 | enum ib_cm_apr_status status, | |
2840 | void *info, | |
2841 | u8 info_length, | |
2842 | const void *private_data, | |
2843 | u8 private_data_len) | |
2844 | { | |
2845 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2846 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2847 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2848 | apr_msg->ap_status = (u8) status; | |
2849 | ||
2850 | if (info && info_length) { | |
2851 | apr_msg->info_length = info_length; | |
2852 | memcpy(apr_msg->info, info, info_length); | |
2853 | } | |
2854 | ||
2855 | if (private_data && private_data_len) | |
2856 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2857 | } | |
2858 | ||
2859 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2860 | enum ib_cm_apr_status status, | |
2861 | void *info, | |
2862 | u8 info_length, | |
2863 | const void *private_data, | |
2864 | u8 private_data_len) | |
2865 | { | |
2866 | struct cm_id_private *cm_id_priv; | |
2867 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2868 | unsigned long flags; |
2869 | int ret; | |
2870 | ||
2871 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2872 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2873 | return -EINVAL; | |
2874 | ||
2875 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2876 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2877 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2878 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2879 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2880 | ret = -EINVAL; | |
2881 | goto out; | |
2882 | } | |
2883 | ||
2884 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2885 | if (ret) | |
2886 | goto out; | |
2887 | ||
2888 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2889 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2890 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2891 | if (ret) { |
2892 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2893 | cm_free_msg(msg); | |
2894 | return ret; | |
2895 | } | |
2896 | ||
2897 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2898 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2899 | return ret; | |
2900 | } | |
2901 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2902 | ||
2903 | static int cm_apr_handler(struct cm_work *work) | |
2904 | { | |
2905 | struct cm_id_private *cm_id_priv; | |
2906 | struct cm_apr_msg *apr_msg; | |
a977049d HR |
2907 | int ret; |
2908 | ||
2909 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2910 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2911 | apr_msg->local_comm_id); | |
2912 | if (!cm_id_priv) | |
2913 | return -EINVAL; /* Unmatched reply. */ | |
2914 | ||
2915 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2916 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2917 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2918 | work->cm_event.private_data = &apr_msg->private_data; | |
2919 | ||
24be6e81 | 2920 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2921 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
2922 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2923 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 2924 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2925 | goto out; |
2926 | } | |
2927 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2928 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2929 | cm_id_priv->msg = NULL; |
2930 | ||
2931 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2932 | if (!ret) | |
2933 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2934 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2935 | |
2936 | if (ret) | |
2937 | cm_process_work(cm_id_priv, work); | |
2938 | else | |
2939 | cm_deref_id(cm_id_priv); | |
2940 | return 0; | |
2941 | out: | |
2942 | cm_deref_id(cm_id_priv); | |
2943 | return -EINVAL; | |
2944 | } | |
2945 | ||
2946 | static int cm_timewait_handler(struct cm_work *work) | |
2947 | { | |
2948 | struct cm_timewait_info *timewait_info; | |
2949 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2950 | int ret; |
2951 | ||
2952 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2953 | spin_lock_irq(&cm.lock); |
2954 | list_del(&timewait_info->list); | |
2955 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2956 | |
2957 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2958 | timewait_info->work.remote_id); | |
2959 | if (!cm_id_priv) | |
2960 | return -EINVAL; | |
2961 | ||
8575329d | 2962 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2963 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2964 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2965 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2966 | goto out; |
2967 | } | |
2968 | cm_id_priv->id.state = IB_CM_IDLE; | |
2969 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2970 | if (!ret) | |
2971 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2972 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2973 | |
2974 | if (ret) | |
2975 | cm_process_work(cm_id_priv, work); | |
2976 | else | |
2977 | cm_deref_id(cm_id_priv); | |
2978 | return 0; | |
2979 | out: | |
2980 | cm_deref_id(cm_id_priv); | |
2981 | return -EINVAL; | |
2982 | } | |
2983 | ||
2984 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2985 | struct cm_id_private *cm_id_priv, | |
2986 | struct ib_cm_sidr_req_param *param) | |
2987 | { | |
2988 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2989 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2990 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
a88f4888 | 2991 | sidr_req_msg->pkey = param->path->pkey; |
a977049d HR |
2992 | sidr_req_msg->service_id = param->service_id; |
2993 | ||
2994 | if (param->private_data && param->private_data_len) | |
2995 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2996 | param->private_data_len); | |
2997 | } | |
2998 | ||
2999 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
3000 | struct ib_cm_sidr_req_param *param) | |
3001 | { | |
3002 | struct cm_id_private *cm_id_priv; | |
3003 | struct ib_mad_send_buf *msg; | |
a977049d HR |
3004 | unsigned long flags; |
3005 | int ret; | |
3006 | ||
3007 | if (!param->path || (param->private_data && | |
3008 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
3009 | return -EINVAL; | |
3010 | ||
3011 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3012 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
3013 | if (ret) | |
3014 | goto out; | |
3015 | ||
3016 | cm_id->service_id = param->service_id; | |
9c3da099 | 3017 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
3018 | cm_id_priv->timeout_ms = param->timeout_ms; |
3019 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
3020 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
3021 | if (ret) | |
3022 | goto out; | |
3023 | ||
3024 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
3025 | param); | |
34816ad9 | 3026 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
3027 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
3028 | ||
3029 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3030 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 3031 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
3032 | else |
3033 | ret = -EINVAL; | |
3034 | ||
3035 | if (ret) { | |
3036 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3037 | cm_free_msg(msg); | |
3038 | goto out; | |
3039 | } | |
3040 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
3041 | cm_id_priv->msg = msg; | |
3042 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3043 | out: | |
3044 | return ret; | |
3045 | } | |
3046 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
3047 | ||
3048 | static void cm_format_sidr_req_event(struct cm_work *work, | |
3049 | struct ib_cm_id *listen_id) | |
3050 | { | |
3051 | struct cm_sidr_req_msg *sidr_req_msg; | |
3052 | struct ib_cm_sidr_req_event_param *param; | |
3053 | ||
3054 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
3055 | work->mad_recv_wc->recv_buf.mad; | |
3056 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 3057 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 3058 | param->listen_id = listen_id; |
15865e7d | 3059 | param->service_id = sidr_req_msg->service_id; |
24cad9a7 | 3060 | param->bth_pkey = cm_get_bth_pkey(work); |
a977049d HR |
3061 | param->port = work->port->port_num; |
3062 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
3063 | } | |
3064 | ||
3065 | static int cm_sidr_req_handler(struct cm_work *work) | |
3066 | { | |
3067 | struct ib_cm_id *cm_id; | |
3068 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
3069 | struct cm_sidr_req_msg *sidr_req_msg; | |
3070 | struct ib_wc *wc; | |
a977049d | 3071 | |
d4c4196f | 3072 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
3073 | if (IS_ERR(cm_id)) |
3074 | return PTR_ERR(cm_id); | |
3075 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3076 | ||
3077 | /* Record SGID/SLID and request ID for lookup. */ | |
3078 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
3079 | work->mad_recv_wc->recv_buf.mad; | |
3080 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 3081 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
3082 | cm_id_priv->av.dgid.global.interface_id = 0; |
3083 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 3084 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
3085 | &cm_id_priv->av); |
3086 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
a977049d HR |
3087 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
3088 | atomic_inc(&cm_id_priv->work_count); | |
3089 | ||
24be6e81 | 3090 | spin_lock_irq(&cm.lock); |
a977049d HR |
3091 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
3092 | if (cur_cm_id_priv) { | |
24be6e81 | 3093 | spin_unlock_irq(&cm.lock); |
9af57b7a SH |
3094 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
3095 | counter[CM_SIDR_REQ_COUNTER]); | |
a977049d HR |
3096 | goto out; /* Duplicate message. */ |
3097 | } | |
29c2731c | 3098 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
07d357d0 | 3099 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
73fec7fd | 3100 | sidr_req_msg->service_id); |
a977049d | 3101 | if (!cur_cm_id_priv) { |
24be6e81 | 3102 | spin_unlock_irq(&cm.lock); |
6164c8cd | 3103 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
a977049d HR |
3104 | goto out; /* No match. */ |
3105 | } | |
3106 | atomic_inc(&cur_cm_id_priv->refcount); | |
29963437 | 3107 | atomic_inc(&cm_id_priv->refcount); |
24be6e81 | 3108 | spin_unlock_irq(&cm.lock); |
a977049d HR |
3109 | |
3110 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
3111 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
3112 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
9c3da099 | 3113 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d HR |
3114 | |
3115 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
3116 | cm_process_work(cm_id_priv, work); | |
3117 | cm_deref_id(cur_cm_id_priv); | |
3118 | return 0; | |
3119 | out: | |
3120 | ib_destroy_cm_id(&cm_id_priv->id); | |
3121 | return -EINVAL; | |
3122 | } | |
3123 | ||
3124 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
3125 | struct cm_id_private *cm_id_priv, | |
3126 | struct ib_cm_sidr_rep_param *param) | |
3127 | { | |
3128 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
3129 | cm_id_priv->tid); | |
3130 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
3131 | sidr_rep_msg->status = param->status; | |
3132 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
3133 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
3134 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
3135 | ||
3136 | if (param->info && param->info_length) | |
3137 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
3138 | ||
3139 | if (param->private_data && param->private_data_len) | |
3140 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
3141 | param->private_data_len); | |
3142 | } | |
3143 | ||
3144 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
3145 | struct ib_cm_sidr_rep_param *param) | |
3146 | { | |
3147 | struct cm_id_private *cm_id_priv; | |
3148 | struct ib_mad_send_buf *msg; | |
a977049d HR |
3149 | unsigned long flags; |
3150 | int ret; | |
3151 | ||
3152 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
3153 | (param->private_data && | |
3154 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
3155 | return -EINVAL; | |
3156 | ||
3157 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3158 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3159 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
3160 | ret = -EINVAL; | |
3161 | goto error; | |
3162 | } | |
3163 | ||
3164 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
3165 | if (ret) | |
3166 | goto error; | |
3167 | ||
3168 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
3169 | param); | |
34816ad9 | 3170 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
3171 | if (ret) { |
3172 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3173 | cm_free_msg(msg); | |
3174 | return ret; | |
3175 | } | |
3176 | cm_id->state = IB_CM_IDLE; | |
3177 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3178 | ||
3179 | spin_lock_irqsave(&cm.lock, flags); | |
0ca81a28 DT |
3180 | if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) { |
3181 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
3182 | RB_CLEAR_NODE(&cm_id_priv->sidr_id_node); | |
3183 | } | |
a977049d HR |
3184 | spin_unlock_irqrestore(&cm.lock, flags); |
3185 | return 0; | |
3186 | ||
3187 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3188 | return ret; | |
3189 | } | |
3190 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
3191 | ||
3192 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
3193 | { | |
3194 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3195 | struct ib_cm_sidr_rep_event_param *param; | |
3196 | ||
3197 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3198 | work->mad_recv_wc->recv_buf.mad; | |
3199 | param = &work->cm_event.param.sidr_rep_rcvd; | |
3200 | param->status = sidr_rep_msg->status; | |
3201 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
3202 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
3203 | param->info = &sidr_rep_msg->info; | |
3204 | param->info_len = sidr_rep_msg->info_length; | |
3205 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
3206 | } | |
3207 | ||
3208 | static int cm_sidr_rep_handler(struct cm_work *work) | |
3209 | { | |
3210 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3211 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
3212 | |
3213 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3214 | work->mad_recv_wc->recv_buf.mad; | |
3215 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
3216 | if (!cm_id_priv) | |
3217 | return -EINVAL; /* Unmatched reply. */ | |
3218 | ||
24be6e81 | 3219 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 3220 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 3221 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3222 | goto out; |
3223 | } | |
3224 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 3225 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 3226 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3227 | |
3228 | cm_format_sidr_rep_event(work); | |
3229 | cm_process_work(cm_id_priv, work); | |
3230 | return 0; | |
3231 | out: | |
3232 | cm_deref_id(cm_id_priv); | |
3233 | return -EINVAL; | |
3234 | } | |
3235 | ||
3236 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
3237 | enum ib_wc_status wc_status) | |
3238 | { | |
3239 | struct cm_id_private *cm_id_priv; | |
3240 | struct ib_cm_event cm_event; | |
3241 | enum ib_cm_state state; | |
a977049d HR |
3242 | int ret; |
3243 | ||
3244 | memset(&cm_event, 0, sizeof cm_event); | |
3245 | cm_id_priv = msg->context[0]; | |
3246 | ||
3247 | /* Discard old sends or ones without a response. */ | |
24be6e81 | 3248 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3249 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
3250 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
3251 | goto discard; | |
3252 | ||
3253 | switch (state) { | |
3254 | case IB_CM_REQ_SENT: | |
3255 | case IB_CM_MRA_REQ_RCVD: | |
3256 | cm_reset_to_idle(cm_id_priv); | |
3257 | cm_event.event = IB_CM_REQ_ERROR; | |
3258 | break; | |
3259 | case IB_CM_REP_SENT: | |
3260 | case IB_CM_MRA_REP_RCVD: | |
3261 | cm_reset_to_idle(cm_id_priv); | |
3262 | cm_event.event = IB_CM_REP_ERROR; | |
3263 | break; | |
3264 | case IB_CM_DREQ_SENT: | |
3265 | cm_enter_timewait(cm_id_priv); | |
3266 | cm_event.event = IB_CM_DREQ_ERROR; | |
3267 | break; | |
3268 | case IB_CM_SIDR_REQ_SENT: | |
3269 | cm_id_priv->id.state = IB_CM_IDLE; | |
3270 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
3271 | break; | |
3272 | default: | |
3273 | goto discard; | |
3274 | } | |
24be6e81 | 3275 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3276 | cm_event.param.send_status = wc_status; |
3277 | ||
3278 | /* No other events can occur on the cm_id at this point. */ | |
3279 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
3280 | cm_free_msg(msg); | |
3281 | if (ret) | |
3282 | ib_destroy_cm_id(&cm_id_priv->id); | |
3283 | return; | |
3284 | discard: | |
24be6e81 | 3285 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3286 | cm_free_msg(msg); |
3287 | } | |
3288 | ||
3289 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
3290 | struct ib_mad_send_wc *mad_send_wc) | |
3291 | { | |
34816ad9 | 3292 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
9af57b7a SH |
3293 | struct cm_port *port; |
3294 | u16 attr_index; | |
3295 | ||
3296 | port = mad_agent->context; | |
3297 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) | |
3298 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; | |
3299 | ||
3300 | /* | |
3301 | * If the send was in response to a received message (context[0] is not | |
3302 | * set to a cm_id), and is not a REJ, then it is a send that was | |
3303 | * manually retried. | |
3304 | */ | |
3305 | if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) | |
3306 | msg->retries = 1; | |
3307 | ||
3308 | atomic_long_add(1 + msg->retries, | |
3309 | &port->counter_group[CM_XMIT].counter[attr_index]); | |
3310 | if (msg->retries) | |
3311 | atomic_long_add(msg->retries, | |
3312 | &port->counter_group[CM_XMIT_RETRIES]. | |
3313 | counter[attr_index]); | |
a977049d HR |
3314 | |
3315 | switch (mad_send_wc->status) { | |
3316 | case IB_WC_SUCCESS: | |
3317 | case IB_WC_WR_FLUSH_ERR: | |
3318 | cm_free_msg(msg); | |
3319 | break; | |
3320 | default: | |
3321 | if (msg->context[0] && msg->context[1]) | |
3322 | cm_process_send_error(msg, mad_send_wc->status); | |
3323 | else | |
3324 | cm_free_msg(msg); | |
3325 | break; | |
3326 | } | |
3327 | } | |
3328 | ||
c4028958 | 3329 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3330 | { |
c4028958 | 3331 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3332 | int ret; |
3333 | ||
3334 | switch (work->cm_event.event) { | |
3335 | case IB_CM_REQ_RECEIVED: | |
3336 | ret = cm_req_handler(work); | |
3337 | break; | |
3338 | case IB_CM_MRA_RECEIVED: | |
3339 | ret = cm_mra_handler(work); | |
3340 | break; | |
3341 | case IB_CM_REJ_RECEIVED: | |
3342 | ret = cm_rej_handler(work); | |
3343 | break; | |
3344 | case IB_CM_REP_RECEIVED: | |
3345 | ret = cm_rep_handler(work); | |
3346 | break; | |
3347 | case IB_CM_RTU_RECEIVED: | |
3348 | ret = cm_rtu_handler(work); | |
3349 | break; | |
3350 | case IB_CM_USER_ESTABLISHED: | |
3351 | ret = cm_establish_handler(work); | |
3352 | break; | |
3353 | case IB_CM_DREQ_RECEIVED: | |
3354 | ret = cm_dreq_handler(work); | |
3355 | break; | |
3356 | case IB_CM_DREP_RECEIVED: | |
3357 | ret = cm_drep_handler(work); | |
3358 | break; | |
3359 | case IB_CM_SIDR_REQ_RECEIVED: | |
3360 | ret = cm_sidr_req_handler(work); | |
3361 | break; | |
3362 | case IB_CM_SIDR_REP_RECEIVED: | |
3363 | ret = cm_sidr_rep_handler(work); | |
3364 | break; | |
3365 | case IB_CM_LAP_RECEIVED: | |
3366 | ret = cm_lap_handler(work); | |
3367 | break; | |
3368 | case IB_CM_APR_RECEIVED: | |
3369 | ret = cm_apr_handler(work); | |
3370 | break; | |
3371 | case IB_CM_TIMEWAIT_EXIT: | |
3372 | ret = cm_timewait_handler(work); | |
3373 | break; | |
3374 | default: | |
3375 | ret = -EINVAL; | |
3376 | break; | |
3377 | } | |
3378 | if (ret) | |
3379 | cm_free_work(work); | |
3380 | } | |
3381 | ||
e1444b5a | 3382 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3383 | { |
3384 | struct cm_id_private *cm_id_priv; | |
3385 | struct cm_work *work; | |
3386 | unsigned long flags; | |
3387 | int ret = 0; | |
be4b4993 ES |
3388 | struct cm_device *cm_dev; |
3389 | ||
3390 | cm_dev = ib_get_client_data(cm_id->device, &cm_client); | |
3391 | if (!cm_dev) | |
3392 | return -ENODEV; | |
a977049d HR |
3393 | |
3394 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3395 | if (!work) | |
3396 | return -ENOMEM; | |
3397 | ||
3398 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3399 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3400 | switch (cm_id->state) | |
3401 | { | |
3402 | case IB_CM_REP_SENT: | |
3403 | case IB_CM_MRA_REP_RCVD: | |
3404 | cm_id->state = IB_CM_ESTABLISHED; | |
3405 | break; | |
3406 | case IB_CM_ESTABLISHED: | |
3407 | ret = -EISCONN; | |
3408 | break; | |
3409 | default: | |
3410 | ret = -EINVAL; | |
3411 | break; | |
3412 | } | |
3413 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3414 | ||
3415 | if (ret) { | |
3416 | kfree(work); | |
3417 | goto out; | |
3418 | } | |
3419 | ||
3420 | /* | |
3421 | * The CM worker thread may try to destroy the cm_id before it | |
3422 | * can execute this work item. To prevent potential deadlock, | |
3423 | * we need to find the cm_id once we're in the context of the | |
3424 | * worker thread, rather than holding a reference on it. | |
3425 | */ | |
c4028958 | 3426 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3427 | work->local_id = cm_id->local_id; |
3428 | work->remote_id = cm_id->remote_id; | |
3429 | work->mad_recv_wc = NULL; | |
3430 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
be4b4993 ES |
3431 | |
3432 | /* Check if the device started its remove_one */ | |
3433 | spin_lock_irq(&cm.lock); | |
3434 | if (!cm_dev->going_down) { | |
3435 | queue_delayed_work(cm.wq, &work->work, 0); | |
3436 | } else { | |
3437 | kfree(work); | |
3438 | ret = -ENODEV; | |
3439 | } | |
3440 | spin_unlock_irq(&cm.lock); | |
3441 | ||
a977049d HR |
3442 | out: |
3443 | return ret; | |
3444 | } | |
e1444b5a SH |
3445 | |
3446 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3447 | { | |
3448 | struct cm_id_private *cm_id_priv; | |
3449 | unsigned long flags; | |
3450 | int ret = 0; | |
3451 | ||
3452 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3453 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3454 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3455 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3456 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3457 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3458 | cm_id_priv->av = cm_id_priv->alt_av; | |
3459 | } else | |
3460 | ret = -EINVAL; | |
3461 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3462 | ||
3463 | return ret; | |
3464 | } | |
3465 | ||
3466 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3467 | { | |
3468 | int ret; | |
3469 | ||
3470 | switch (event) { | |
3471 | case IB_EVENT_COMM_EST: | |
3472 | ret = cm_establish(cm_id); | |
3473 | break; | |
3474 | case IB_EVENT_PATH_MIG: | |
3475 | ret = cm_migrate(cm_id); | |
3476 | break; | |
3477 | default: | |
3478 | ret = -EINVAL; | |
3479 | } | |
3480 | return ret; | |
3481 | } | |
3482 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3483 | |
3484 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3485 | struct ib_mad_recv_wc *mad_recv_wc) | |
3486 | { | |
9af57b7a | 3487 | struct cm_port *port = mad_agent->context; |
a977049d HR |
3488 | struct cm_work *work; |
3489 | enum ib_cm_event_type event; | |
9af57b7a | 3490 | u16 attr_id; |
a977049d | 3491 | int paths = 0; |
be4b4993 | 3492 | int going_down = 0; |
a977049d HR |
3493 | |
3494 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3495 | case CM_REQ_ATTR_ID: | |
3496 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3497 | alt_local_lid != 0); | |
3498 | event = IB_CM_REQ_RECEIVED; | |
3499 | break; | |
3500 | case CM_MRA_ATTR_ID: | |
3501 | event = IB_CM_MRA_RECEIVED; | |
3502 | break; | |
3503 | case CM_REJ_ATTR_ID: | |
3504 | event = IB_CM_REJ_RECEIVED; | |
3505 | break; | |
3506 | case CM_REP_ATTR_ID: | |
3507 | event = IB_CM_REP_RECEIVED; | |
3508 | break; | |
3509 | case CM_RTU_ATTR_ID: | |
3510 | event = IB_CM_RTU_RECEIVED; | |
3511 | break; | |
3512 | case CM_DREQ_ATTR_ID: | |
3513 | event = IB_CM_DREQ_RECEIVED; | |
3514 | break; | |
3515 | case CM_DREP_ATTR_ID: | |
3516 | event = IB_CM_DREP_RECEIVED; | |
3517 | break; | |
3518 | case CM_SIDR_REQ_ATTR_ID: | |
3519 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3520 | break; | |
3521 | case CM_SIDR_REP_ATTR_ID: | |
3522 | event = IB_CM_SIDR_REP_RECEIVED; | |
3523 | break; | |
3524 | case CM_LAP_ATTR_ID: | |
3525 | paths = 1; | |
3526 | event = IB_CM_LAP_RECEIVED; | |
3527 | break; | |
3528 | case CM_APR_ATTR_ID: | |
3529 | event = IB_CM_APR_RECEIVED; | |
3530 | break; | |
3531 | default: | |
3532 | ib_free_recv_mad(mad_recv_wc); | |
3533 | return; | |
3534 | } | |
3535 | ||
9af57b7a SH |
3536 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
3537 | atomic_long_inc(&port->counter_group[CM_RECV]. | |
3538 | counter[attr_id - CM_ATTR_ID_OFFSET]); | |
3539 | ||
a977049d HR |
3540 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
3541 | GFP_KERNEL); | |
3542 | if (!work) { | |
3543 | ib_free_recv_mad(mad_recv_wc); | |
3544 | return; | |
3545 | } | |
3546 | ||
c4028958 | 3547 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3548 | work->cm_event.event = event; |
3549 | work->mad_recv_wc = mad_recv_wc; | |
9af57b7a | 3550 | work->port = port; |
be4b4993 ES |
3551 | |
3552 | /* Check if the device started its remove_one */ | |
3553 | spin_lock_irq(&cm.lock); | |
3554 | if (!port->cm_dev->going_down) | |
3555 | queue_delayed_work(cm.wq, &work->work, 0); | |
3556 | else | |
3557 | going_down = 1; | |
3558 | spin_unlock_irq(&cm.lock); | |
3559 | ||
3560 | if (going_down) { | |
3561 | kfree(work); | |
3562 | ib_free_recv_mad(mad_recv_wc); | |
3563 | } | |
a977049d HR |
3564 | } |
3565 | ||
3566 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3567 | struct ib_qp_attr *qp_attr, | |
3568 | int *qp_attr_mask) | |
3569 | { | |
3570 | unsigned long flags; | |
3571 | int ret; | |
3572 | ||
3573 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3574 | switch (cm_id_priv->id.state) { | |
3575 | case IB_CM_REQ_SENT: | |
3576 | case IB_CM_MRA_REQ_RCVD: | |
3577 | case IB_CM_REQ_RCVD: | |
3578 | case IB_CM_MRA_REQ_SENT: | |
3579 | case IB_CM_REP_RCVD: | |
3580 | case IB_CM_MRA_REP_SENT: | |
3581 | case IB_CM_REP_SENT: | |
3582 | case IB_CM_MRA_REP_RCVD: | |
3583 | case IB_CM_ESTABLISHED: | |
3584 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3585 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 3586 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 3587 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3588 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3589 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3590 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3591 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3592 | ret = 0; | |
3593 | break; | |
3594 | default: | |
3595 | ret = -EINVAL; | |
3596 | break; | |
3597 | } | |
3598 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3599 | return ret; | |
3600 | } | |
3601 | ||
3602 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3603 | struct ib_qp_attr *qp_attr, | |
3604 | int *qp_attr_mask) | |
3605 | { | |
3606 | unsigned long flags; | |
3607 | int ret; | |
3608 | ||
3609 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3610 | switch (cm_id_priv->id.state) { | |
3611 | case IB_CM_REQ_RCVD: | |
3612 | case IB_CM_MRA_REQ_SENT: | |
3613 | case IB_CM_REP_RCVD: | |
3614 | case IB_CM_MRA_REP_SENT: | |
3615 | case IB_CM_REP_SENT: | |
3616 | case IB_CM_MRA_REP_RCVD: | |
3617 | case IB_CM_ESTABLISHED: | |
3618 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3619 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d | 3620 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
990acea6 WY |
3621 | if (!cm_id_priv->av.valid) { |
3622 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
dd5f03be | 3623 | return -EINVAL; |
990acea6 | 3624 | } |
dd5f03be MB |
3625 | if (cm_id_priv->av.ah_attr.vlan_id != 0xffff) { |
3626 | qp_attr->vlan_id = cm_id_priv->av.ah_attr.vlan_id; | |
3627 | *qp_attr_mask |= IB_QP_VID; | |
3628 | } | |
3629 | if (!is_zero_ether_addr(cm_id_priv->av.smac)) { | |
3630 | memcpy(qp_attr->smac, cm_id_priv->av.smac, | |
3631 | sizeof(qp_attr->smac)); | |
3632 | *qp_attr_mask |= IB_QP_SMAC; | |
3633 | } | |
3634 | if (cm_id_priv->alt_av.valid) { | |
3635 | if (cm_id_priv->alt_av.ah_attr.vlan_id != 0xffff) { | |
3636 | qp_attr->alt_vlan_id = | |
3637 | cm_id_priv->alt_av.ah_attr.vlan_id; | |
3638 | *qp_attr_mask |= IB_QP_ALT_VID; | |
3639 | } | |
3640 | if (!is_zero_ether_addr(cm_id_priv->alt_av.smac)) { | |
3641 | memcpy(qp_attr->alt_smac, | |
3642 | cm_id_priv->alt_av.smac, | |
3643 | sizeof(qp_attr->alt_smac)); | |
3644 | *qp_attr_mask |= IB_QP_ALT_SMAC; | |
3645 | } | |
3646 | } | |
a977049d HR |
3647 | qp_attr->path_mtu = cm_id_priv->path_mtu; |
3648 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3649 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
d26a360b SH |
3650 | if (cm_id_priv->qp_type == IB_QPT_RC || |
3651 | cm_id_priv->qp_type == IB_QPT_XRC_TGT) { | |
ae7971a7 SH |
3652 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
3653 | IB_QP_MIN_RNR_TIMER; | |
3654 | qp_attr->max_dest_rd_atomic = | |
3655 | cm_id_priv->responder_resources; | |
3656 | qp_attr->min_rnr_timer = 0; | |
3657 | } | |
a977049d HR |
3658 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3659 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3660 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 3661 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 3662 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
3663 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3664 | } | |
3665 | ret = 0; | |
3666 | break; | |
3667 | default: | |
3668 | ret = -EINVAL; | |
3669 | break; | |
3670 | } | |
3671 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3672 | return ret; | |
3673 | } | |
3674 | ||
3675 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3676 | struct ib_qp_attr *qp_attr, | |
3677 | int *qp_attr_mask) | |
3678 | { | |
3679 | unsigned long flags; | |
3680 | int ret; | |
3681 | ||
3682 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3683 | switch (cm_id_priv->id.state) { | |
0fe313b0 SH |
3684 | /* Allow transition to RTS before sending REP */ |
3685 | case IB_CM_REQ_RCVD: | |
3686 | case IB_CM_MRA_REQ_SENT: | |
3687 | ||
a977049d HR |
3688 | case IB_CM_REP_RCVD: |
3689 | case IB_CM_MRA_REP_SENT: | |
3690 | case IB_CM_REP_SENT: | |
3691 | case IB_CM_MRA_REP_RCVD: | |
3692 | case IB_CM_ESTABLISHED: | |
e1444b5a SH |
3693 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
3694 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
3695 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
d26a360b SH |
3696 | switch (cm_id_priv->qp_type) { |
3697 | case IB_QPT_RC: | |
3698 | case IB_QPT_XRC_INI: | |
3699 | *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY | | |
e1444b5a | 3700 | IB_QP_MAX_QP_RD_ATOMIC; |
e1444b5a SH |
3701 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
3702 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
d26a360b SH |
3703 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; |
3704 | /* fall through */ | |
3705 | case IB_QPT_XRC_TGT: | |
3706 | *qp_attr_mask |= IB_QP_TIMEOUT; | |
3707 | qp_attr->timeout = cm_id_priv->av.timeout; | |
3708 | break; | |
3709 | default: | |
3710 | break; | |
e1444b5a SH |
3711 | } |
3712 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3713 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3714 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3715 | } | |
3716 | } else { | |
3717 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
3718 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; | |
3719 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; | |
1d846126 | 3720 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 3721 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
3722 | qp_attr->path_mig_state = IB_MIG_REARM; |
3723 | } | |
3724 | ret = 0; | |
3725 | break; | |
3726 | default: | |
3727 | ret = -EINVAL; | |
3728 | break; | |
3729 | } | |
3730 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3731 | return ret; | |
3732 | } | |
3733 | ||
3734 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3735 | struct ib_qp_attr *qp_attr, | |
3736 | int *qp_attr_mask) | |
3737 | { | |
3738 | struct cm_id_private *cm_id_priv; | |
3739 | int ret; | |
3740 | ||
3741 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3742 | switch (qp_attr->qp_state) { | |
3743 | case IB_QPS_INIT: | |
3744 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3745 | break; | |
3746 | case IB_QPS_RTR: | |
3747 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3748 | break; | |
3749 | case IB_QPS_RTS: | |
3750 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3751 | break; | |
3752 | default: | |
3753 | ret = -EINVAL; | |
3754 | break; | |
3755 | } | |
3756 | return ret; | |
3757 | } | |
3758 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3759 | ||
454a01e7 | 3760 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
1d846126 SH |
3761 | { |
3762 | struct ib_device_attr attr; | |
3763 | ||
d4c4196f | 3764 | if (ib_query_device(cm_dev->ib_device, &attr)) |
1d846126 SH |
3765 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ |
3766 | else | |
3767 | cm_dev->ack_delay = attr.local_ca_ack_delay; | |
3768 | } | |
3769 | ||
9af57b7a SH |
3770 | static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, |
3771 | char *buf) | |
3772 | { | |
3773 | struct cm_counter_group *group; | |
3774 | struct cm_counter_attribute *cm_attr; | |
3775 | ||
3776 | group = container_of(obj, struct cm_counter_group, obj); | |
3777 | cm_attr = container_of(attr, struct cm_counter_attribute, attr); | |
3778 | ||
3779 | return sprintf(buf, "%ld\n", | |
3780 | atomic_long_read(&group->counter[cm_attr->index])); | |
3781 | } | |
3782 | ||
52cf25d0 | 3783 | static const struct sysfs_ops cm_counter_ops = { |
9af57b7a SH |
3784 | .show = cm_show_counter |
3785 | }; | |
3786 | ||
3787 | static struct kobj_type cm_counter_obj_type = { | |
3788 | .sysfs_ops = &cm_counter_ops, | |
3789 | .default_attrs = cm_counter_default_attrs | |
3790 | }; | |
3791 | ||
3792 | static void cm_release_port_obj(struct kobject *obj) | |
3793 | { | |
3794 | struct cm_port *cm_port; | |
3795 | ||
9af57b7a SH |
3796 | cm_port = container_of(obj, struct cm_port, port_obj); |
3797 | kfree(cm_port); | |
3798 | } | |
3799 | ||
3800 | static struct kobj_type cm_port_obj_type = { | |
3801 | .release = cm_release_port_obj | |
3802 | }; | |
3803 | ||
2c9ede55 | 3804 | static char *cm_devnode(struct device *dev, umode_t *mode) |
c3af0980 | 3805 | { |
b2bc4782 GR |
3806 | if (mode) |
3807 | *mode = 0666; | |
c3af0980 RD |
3808 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
3809 | } | |
3810 | ||
9af57b7a | 3811 | struct class cm_class = { |
c3af0980 | 3812 | .owner = THIS_MODULE, |
9af57b7a | 3813 | .name = "infiniband_cm", |
c3af0980 | 3814 | .devnode = cm_devnode, |
9af57b7a SH |
3815 | }; |
3816 | EXPORT_SYMBOL(cm_class); | |
3817 | ||
9af57b7a SH |
3818 | static int cm_create_port_fs(struct cm_port *port) |
3819 | { | |
3820 | int i, ret; | |
3821 | ||
3822 | ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, | |
110cf374 | 3823 | &port->cm_dev->device->kobj, |
9af57b7a SH |
3824 | "%d", port->port_num); |
3825 | if (ret) { | |
3826 | kfree(port); | |
3827 | return ret; | |
3828 | } | |
3829 | ||
3830 | for (i = 0; i < CM_COUNTER_GROUPS; i++) { | |
3831 | ret = kobject_init_and_add(&port->counter_group[i].obj, | |
3832 | &cm_counter_obj_type, | |
7c7a9bcc | 3833 | &port->port_obj, |
9af57b7a SH |
3834 | "%s", counter_group_names[i]); |
3835 | if (ret) | |
3836 | goto error; | |
3837 | } | |
3838 | ||
3839 | return 0; | |
3840 | ||
3841 | error: | |
3842 | while (i--) | |
7c7a9bcc RD |
3843 | kobject_put(&port->counter_group[i].obj); |
3844 | kobject_put(&port->port_obj); | |
9af57b7a SH |
3845 | return ret; |
3846 | ||
3847 | } | |
3848 | ||
3849 | static void cm_remove_port_fs(struct cm_port *port) | |
3850 | { | |
3851 | int i; | |
3852 | ||
3853 | for (i = 0; i < CM_COUNTER_GROUPS; i++) | |
7c7a9bcc | 3854 | kobject_put(&port->counter_group[i].obj); |
9af57b7a | 3855 | |
7c7a9bcc | 3856 | kobject_put(&port->port_obj); |
9af57b7a SH |
3857 | } |
3858 | ||
d4c4196f | 3859 | static void cm_add_one(struct ib_device *ib_device) |
a977049d HR |
3860 | { |
3861 | struct cm_device *cm_dev; | |
3862 | struct cm_port *port; | |
3863 | struct ib_mad_reg_req reg_req = { | |
3864 | .mgmt_class = IB_MGMT_CLASS_CM, | |
0f29b46d | 3865 | .mgmt_class_version = IB_CM_CLASS_VERSION, |
a977049d HR |
3866 | }; |
3867 | struct ib_port_modify port_modify = { | |
3868 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3869 | }; | |
3870 | unsigned long flags; | |
3871 | int ret; | |
091e6a4c | 3872 | int count = 0; |
a977049d HR |
3873 | u8 i; |
3874 | ||
9af57b7a | 3875 | cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * |
d4c4196f | 3876 | ib_device->phys_port_cnt, GFP_KERNEL); |
a977049d HR |
3877 | if (!cm_dev) |
3878 | return; | |
3879 | ||
d4c4196f | 3880 | cm_dev->ib_device = ib_device; |
1d846126 | 3881 | cm_get_ack_delay(cm_dev); |
be4b4993 | 3882 | cm_dev->going_down = 0; |
91bd418f GKH |
3883 | cm_dev->device = device_create(&cm_class, &ib_device->dev, |
3884 | MKDEV(0, 0), NULL, | |
3885 | "%s", ib_device->name); | |
3e340c05 | 3886 | if (IS_ERR(cm_dev->device)) { |
9af57b7a SH |
3887 | kfree(cm_dev); |
3888 | return; | |
3889 | } | |
3890 | ||
a977049d | 3891 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
d4c4196f | 3892 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
72219cea | 3893 | if (!rdma_cap_ib_cm(ib_device, i)) |
091e6a4c MW |
3894 | continue; |
3895 | ||
9af57b7a SH |
3896 | port = kzalloc(sizeof *port, GFP_KERNEL); |
3897 | if (!port) | |
3898 | goto error1; | |
3899 | ||
3900 | cm_dev->port[i-1] = port; | |
a977049d HR |
3901 | port->cm_dev = cm_dev; |
3902 | port->port_num = i; | |
9af57b7a SH |
3903 | |
3904 | ret = cm_create_port_fs(port); | |
3905 | if (ret) | |
3906 | goto error1; | |
3907 | ||
d4c4196f | 3908 | port->mad_agent = ib_register_mad_agent(ib_device, i, |
a977049d HR |
3909 | IB_QPT_GSI, |
3910 | ®_req, | |
3911 | 0, | |
3912 | cm_send_handler, | |
3913 | cm_recv_handler, | |
0f29b46d IW |
3914 | port, |
3915 | 0); | |
a977049d | 3916 | if (IS_ERR(port->mad_agent)) |
9af57b7a | 3917 | goto error2; |
a977049d | 3918 | |
d4c4196f | 3919 | ret = ib_modify_port(ib_device, i, 0, &port_modify); |
a977049d | 3920 | if (ret) |
9af57b7a | 3921 | goto error3; |
091e6a4c MW |
3922 | |
3923 | count++; | |
a977049d | 3924 | } |
091e6a4c MW |
3925 | |
3926 | if (!count) | |
3927 | goto free; | |
3928 | ||
d4c4196f | 3929 | ib_set_client_data(ib_device, &cm_client, cm_dev); |
a977049d HR |
3930 | |
3931 | write_lock_irqsave(&cm.device_lock, flags); | |
3932 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3933 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3934 | return; | |
3935 | ||
9af57b7a | 3936 | error3: |
cf311cd4 | 3937 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a SH |
3938 | error2: |
3939 | cm_remove_port_fs(port); | |
cf311cd4 | 3940 | error1: |
a977049d HR |
3941 | port_modify.set_port_cap_mask = 0; |
3942 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3943 | while (--i) { | |
72219cea | 3944 | if (!rdma_cap_ib_cm(ib_device, i)) |
091e6a4c MW |
3945 | continue; |
3946 | ||
9af57b7a | 3947 | port = cm_dev->port[i-1]; |
d4c4196f | 3948 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3949 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a | 3950 | cm_remove_port_fs(port); |
a977049d | 3951 | } |
091e6a4c | 3952 | free: |
110cf374 | 3953 | device_unregister(cm_dev->device); |
a7e80ce2 | 3954 | kfree(cm_dev); |
a977049d HR |
3955 | } |
3956 | ||
7c1eb45a | 3957 | static void cm_remove_one(struct ib_device *ib_device, void *client_data) |
a977049d | 3958 | { |
7c1eb45a | 3959 | struct cm_device *cm_dev = client_data; |
a977049d HR |
3960 | struct cm_port *port; |
3961 | struct ib_port_modify port_modify = { | |
3962 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3963 | }; | |
3964 | unsigned long flags; | |
3965 | int i; | |
3966 | ||
a977049d HR |
3967 | if (!cm_dev) |
3968 | return; | |
3969 | ||
3970 | write_lock_irqsave(&cm.device_lock, flags); | |
3971 | list_del(&cm_dev->list); | |
3972 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3973 | ||
be4b4993 ES |
3974 | spin_lock_irq(&cm.lock); |
3975 | cm_dev->going_down = 1; | |
3976 | spin_unlock_irq(&cm.lock); | |
3977 | ||
d4c4196f | 3978 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
72219cea | 3979 | if (!rdma_cap_ib_cm(ib_device, i)) |
091e6a4c MW |
3980 | continue; |
3981 | ||
9af57b7a | 3982 | port = cm_dev->port[i-1]; |
d4c4196f | 3983 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
be4b4993 ES |
3984 | /* |
3985 | * We flush the queue here after the going_down set, this | |
3986 | * verify that no new works will be queued in the recv handler, | |
3987 | * after that we can call the unregister_mad_agent | |
3988 | */ | |
84ba284c | 3989 | flush_workqueue(cm.wq); |
be4b4993 | 3990 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a | 3991 | cm_remove_port_fs(port); |
a977049d | 3992 | } |
110cf374 | 3993 | device_unregister(cm_dev->device); |
a7e80ce2 | 3994 | kfree(cm_dev); |
a977049d HR |
3995 | } |
3996 | ||
3997 | static int __init ib_cm_init(void) | |
3998 | { | |
3999 | int ret; | |
4000 | ||
4001 | memset(&cm, 0, sizeof cm); | |
4002 | INIT_LIST_HEAD(&cm.device_list); | |
4003 | rwlock_init(&cm.device_lock); | |
4004 | spin_lock_init(&cm.lock); | |
4005 | cm.listen_service_table = RB_ROOT; | |
9c3da099 | 4006 | cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
a977049d HR |
4007 | cm.remote_id_table = RB_ROOT; |
4008 | cm.remote_qp_table = RB_ROOT; | |
4009 | cm.remote_sidr_table = RB_ROOT; | |
4010 | idr_init(&cm.local_id_table); | |
f06d2653 | 4011 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
8575329d | 4012 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d | 4013 | |
9af57b7a | 4014 | ret = class_register(&cm_class); |
87d4abda DB |
4015 | if (ret) { |
4016 | ret = -ENOMEM; | |
4017 | goto error1; | |
4018 | } | |
a977049d | 4019 | |
9af57b7a SH |
4020 | cm.wq = create_workqueue("ib_cm"); |
4021 | if (!cm.wq) { | |
4022 | ret = -ENOMEM; | |
87d4abda | 4023 | goto error2; |
9af57b7a SH |
4024 | } |
4025 | ||
a977049d HR |
4026 | ret = ib_register_client(&cm_client); |
4027 | if (ret) | |
87d4abda | 4028 | goto error3; |
a977049d HR |
4029 | |
4030 | return 0; | |
87d4abda | 4031 | error3: |
a977049d | 4032 | destroy_workqueue(cm.wq); |
87d4abda | 4033 | error2: |
9af57b7a | 4034 | class_unregister(&cm_class); |
87d4abda DB |
4035 | error1: |
4036 | idr_destroy(&cm.local_id_table); | |
a977049d HR |
4037 | return ret; |
4038 | } | |
4039 | ||
4040 | static void __exit ib_cm_cleanup(void) | |
4041 | { | |
8575329d SH |
4042 | struct cm_timewait_info *timewait_info, *tmp; |
4043 | ||
4044 | spin_lock_irq(&cm.lock); | |
4045 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
4046 | cancel_delayed_work(&timewait_info->work.work); | |
4047 | spin_unlock_irq(&cm.lock); | |
4048 | ||
84ba284c | 4049 | ib_unregister_client(&cm_client); |
a977049d | 4050 | destroy_workqueue(cm.wq); |
8575329d SH |
4051 | |
4052 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
4053 | list_del(&timewait_info->list); | |
4054 | kfree(timewait_info); | |
4055 | } | |
4056 | ||
9af57b7a | 4057 | class_unregister(&cm_class); |
5d7edb3c | 4058 | idr_destroy(&cm.local_id_table); |
a977049d HR |
4059 | } |
4060 | ||
4061 | module_init(ib_cm_init); | |
4062 | module_exit(ib_cm_cleanup); | |
4063 |