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a977049d | 1 | /* |
9af57b7a | 2 | * Copyright (c) 2004-2007 Intel Corporation. All rights reserved. |
a977049d HR |
3 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
4 | * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. | |
5 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
6 | * | |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
a977049d | 34 | */ |
1b52fa98 SH |
35 | |
36 | #include <linux/completion.h> | |
a977049d | 37 | #include <linux/dma-mapping.h> |
9af57b7a | 38 | #include <linux/device.h> |
e4dd23d7 | 39 | #include <linux/module.h> |
a977049d HR |
40 | #include <linux/err.h> |
41 | #include <linux/idr.h> | |
42 | #include <linux/interrupt.h> | |
f06d2653 | 43 | #include <linux/random.h> |
a977049d HR |
44 | #include <linux/rbtree.h> |
45 | #include <linux/spinlock.h> | |
5a0e3ad6 | 46 | #include <linux/slab.h> |
9af57b7a | 47 | #include <linux/sysfs.h> |
a977049d | 48 | #include <linux/workqueue.h> |
110cf374 | 49 | #include <linux/kdev_t.h> |
dd5f03be | 50 | #include <linux/etherdevice.h> |
a977049d | 51 | |
a4d61e84 RD |
52 | #include <rdma/ib_cache.h> |
53 | #include <rdma/ib_cm.h> | |
a977049d HR |
54 | #include "cm_msgs.h" |
55 | ||
56 | MODULE_AUTHOR("Sean Hefty"); | |
57 | MODULE_DESCRIPTION("InfiniBand CM"); | |
58 | MODULE_LICENSE("Dual BSD/GPL"); | |
59 | ||
60 | static void cm_add_one(struct ib_device *device); | |
61 | static void cm_remove_one(struct ib_device *device); | |
62 | ||
63 | static struct ib_client cm_client = { | |
64 | .name = "cm", | |
65 | .add = cm_add_one, | |
66 | .remove = cm_remove_one | |
67 | }; | |
68 | ||
69 | static struct ib_cm { | |
70 | spinlock_t lock; | |
71 | struct list_head device_list; | |
72 | rwlock_t device_lock; | |
73 | struct rb_root listen_service_table; | |
74 | u64 listen_service_id; | |
75 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
76 | struct rb_root remote_qp_table; | |
77 | struct rb_root remote_id_table; | |
78 | struct rb_root remote_sidr_table; | |
79 | struct idr local_id_table; | |
f06d2653 | 80 | __be32 random_id_operand; |
8575329d | 81 | struct list_head timewait_list; |
a977049d HR |
82 | struct workqueue_struct *wq; |
83 | } cm; | |
84 | ||
9af57b7a SH |
85 | /* Counter indexes ordered by attribute ID */ |
86 | enum { | |
87 | CM_REQ_COUNTER, | |
88 | CM_MRA_COUNTER, | |
89 | CM_REJ_COUNTER, | |
90 | CM_REP_COUNTER, | |
91 | CM_RTU_COUNTER, | |
92 | CM_DREQ_COUNTER, | |
93 | CM_DREP_COUNTER, | |
94 | CM_SIDR_REQ_COUNTER, | |
95 | CM_SIDR_REP_COUNTER, | |
96 | CM_LAP_COUNTER, | |
97 | CM_APR_COUNTER, | |
98 | CM_ATTR_COUNT, | |
99 | CM_ATTR_ID_OFFSET = 0x0010, | |
100 | }; | |
101 | ||
102 | enum { | |
103 | CM_XMIT, | |
104 | CM_XMIT_RETRIES, | |
105 | CM_RECV, | |
106 | CM_RECV_DUPLICATES, | |
107 | CM_COUNTER_GROUPS | |
108 | }; | |
109 | ||
110 | static char const counter_group_names[CM_COUNTER_GROUPS] | |
111 | [sizeof("cm_rx_duplicates")] = { | |
112 | "cm_tx_msgs", "cm_tx_retries", | |
113 | "cm_rx_msgs", "cm_rx_duplicates" | |
114 | }; | |
115 | ||
116 | struct cm_counter_group { | |
117 | struct kobject obj; | |
118 | atomic_long_t counter[CM_ATTR_COUNT]; | |
119 | }; | |
120 | ||
121 | struct cm_counter_attribute { | |
122 | struct attribute attr; | |
123 | int index; | |
124 | }; | |
125 | ||
126 | #define CM_COUNTER_ATTR(_name, _index) \ | |
127 | struct cm_counter_attribute cm_##_name##_counter_attr = { \ | |
01e8ef11 | 128 | .attr = { .name = __stringify(_name), .mode = 0444 }, \ |
9af57b7a SH |
129 | .index = _index \ |
130 | } | |
131 | ||
132 | static CM_COUNTER_ATTR(req, CM_REQ_COUNTER); | |
133 | static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER); | |
134 | static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER); | |
135 | static CM_COUNTER_ATTR(rep, CM_REP_COUNTER); | |
136 | static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER); | |
137 | static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER); | |
138 | static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER); | |
139 | static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER); | |
140 | static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER); | |
141 | static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER); | |
142 | static CM_COUNTER_ATTR(apr, CM_APR_COUNTER); | |
143 | ||
144 | static struct attribute *cm_counter_default_attrs[] = { | |
145 | &cm_req_counter_attr.attr, | |
146 | &cm_mra_counter_attr.attr, | |
147 | &cm_rej_counter_attr.attr, | |
148 | &cm_rep_counter_attr.attr, | |
149 | &cm_rtu_counter_attr.attr, | |
150 | &cm_dreq_counter_attr.attr, | |
151 | &cm_drep_counter_attr.attr, | |
152 | &cm_sidr_req_counter_attr.attr, | |
153 | &cm_sidr_rep_counter_attr.attr, | |
154 | &cm_lap_counter_attr.attr, | |
155 | &cm_apr_counter_attr.attr, | |
156 | NULL | |
157 | }; | |
158 | ||
a977049d HR |
159 | struct cm_port { |
160 | struct cm_device *cm_dev; | |
161 | struct ib_mad_agent *mad_agent; | |
9af57b7a | 162 | struct kobject port_obj; |
a977049d | 163 | u8 port_num; |
9af57b7a | 164 | struct cm_counter_group counter_group[CM_COUNTER_GROUPS]; |
a977049d HR |
165 | }; |
166 | ||
167 | struct cm_device { | |
168 | struct list_head list; | |
d4c4196f | 169 | struct ib_device *ib_device; |
110cf374 | 170 | struct device *device; |
1d846126 | 171 | u8 ack_delay; |
9af57b7a | 172 | struct cm_port *port[0]; |
a977049d HR |
173 | }; |
174 | ||
175 | struct cm_av { | |
176 | struct cm_port *port; | |
177 | union ib_gid dgid; | |
178 | struct ib_ah_attr ah_attr; | |
179 | u16 pkey_index; | |
1d846126 | 180 | u8 timeout; |
dd5f03be MB |
181 | u8 valid; |
182 | u8 smac[ETH_ALEN]; | |
a977049d HR |
183 | }; |
184 | ||
185 | struct cm_work { | |
c4028958 | 186 | struct delayed_work work; |
a977049d HR |
187 | struct list_head list; |
188 | struct cm_port *port; | |
189 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
190 | __be32 local_id; /* Established / timewait */ |
191 | __be32 remote_id; | |
a977049d HR |
192 | struct ib_cm_event cm_event; |
193 | struct ib_sa_path_rec path[0]; | |
194 | }; | |
195 | ||
196 | struct cm_timewait_info { | |
197 | struct cm_work work; /* Must be first. */ | |
8575329d | 198 | struct list_head list; |
a977049d HR |
199 | struct rb_node remote_qp_node; |
200 | struct rb_node remote_id_node; | |
97f52eb4 SH |
201 | __be64 remote_ca_guid; |
202 | __be32 remote_qpn; | |
a977049d HR |
203 | u8 inserted_remote_qp; |
204 | u8 inserted_remote_id; | |
205 | }; | |
206 | ||
207 | struct cm_id_private { | |
208 | struct ib_cm_id id; | |
209 | ||
210 | struct rb_node service_node; | |
211 | struct rb_node sidr_id_node; | |
87fd1a11 | 212 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 213 | struct completion comp; |
a977049d HR |
214 | atomic_t refcount; |
215 | ||
216 | struct ib_mad_send_buf *msg; | |
217 | struct cm_timewait_info *timewait_info; | |
218 | /* todo: use alternate port on send failure */ | |
219 | struct cm_av av; | |
220 | struct cm_av alt_av; | |
6e61d04f | 221 | struct ib_cm_compare_data *compare_data; |
a977049d HR |
222 | |
223 | void *private_data; | |
97f52eb4 SH |
224 | __be64 tid; |
225 | __be32 local_qpn; | |
226 | __be32 remote_qpn; | |
ae7971a7 | 227 | enum ib_qp_type qp_type; |
97f52eb4 SH |
228 | __be32 sq_psn; |
229 | __be32 rq_psn; | |
a977049d HR |
230 | int timeout_ms; |
231 | enum ib_mtu path_mtu; | |
e1444b5a | 232 | __be16 pkey; |
a977049d HR |
233 | u8 private_data_len; |
234 | u8 max_cm_retries; | |
235 | u8 peer_to_peer; | |
236 | u8 responder_resources; | |
237 | u8 initiator_depth; | |
a977049d HR |
238 | u8 retry_count; |
239 | u8 rnr_retry_count; | |
240 | u8 service_timeout; | |
1d846126 | 241 | u8 target_ack_delay; |
a977049d HR |
242 | |
243 | struct list_head work_list; | |
244 | atomic_t work_count; | |
245 | }; | |
246 | ||
c4028958 | 247 | static void cm_work_handler(struct work_struct *work); |
a977049d HR |
248 | |
249 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
250 | { | |
251 | if (atomic_dec_and_test(&cm_id_priv->refcount)) | |
1b52fa98 | 252 | complete(&cm_id_priv->comp); |
a977049d HR |
253 | } |
254 | ||
255 | static int cm_alloc_msg(struct cm_id_private *cm_id_priv, | |
256 | struct ib_mad_send_buf **msg) | |
257 | { | |
258 | struct ib_mad_agent *mad_agent; | |
259 | struct ib_mad_send_buf *m; | |
260 | struct ib_ah *ah; | |
261 | ||
262 | mad_agent = cm_id_priv->av.port->mad_agent; | |
263 | ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); | |
264 | if (IS_ERR(ah)) | |
265 | return PTR_ERR(ah); | |
266 | ||
3cd96564 | 267 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
354ba39c | 268 | cm_id_priv->av.pkey_index, |
34816ad9 | 269 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
270 | GFP_ATOMIC); |
271 | if (IS_ERR(m)) { | |
272 | ib_destroy_ah(ah); | |
273 | return PTR_ERR(m); | |
274 | } | |
275 | ||
276 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
277 | m->ah = ah; |
278 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d HR |
279 | |
280 | atomic_inc(&cm_id_priv->refcount); | |
281 | m->context[0] = cm_id_priv; | |
282 | *msg = m; | |
283 | return 0; | |
284 | } | |
285 | ||
286 | static int cm_alloc_response_msg(struct cm_port *port, | |
287 | struct ib_mad_recv_wc *mad_recv_wc, | |
288 | struct ib_mad_send_buf **msg) | |
289 | { | |
290 | struct ib_mad_send_buf *m; | |
291 | struct ib_ah *ah; | |
292 | ||
293 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
294 | mad_recv_wc->recv_buf.grh, port->port_num); | |
295 | if (IS_ERR(ah)) | |
296 | return PTR_ERR(ah); | |
297 | ||
298 | m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
34816ad9 | 299 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
a977049d HR |
300 | GFP_ATOMIC); |
301 | if (IS_ERR(m)) { | |
302 | ib_destroy_ah(ah); | |
303 | return PTR_ERR(m); | |
304 | } | |
34816ad9 | 305 | m->ah = ah; |
a977049d HR |
306 | *msg = m; |
307 | return 0; | |
308 | } | |
309 | ||
310 | static void cm_free_msg(struct ib_mad_send_buf *msg) | |
311 | { | |
34816ad9 | 312 | ib_destroy_ah(msg->ah); |
a977049d HR |
313 | if (msg->context[0]) |
314 | cm_deref_id(msg->context[0]); | |
315 | ib_free_send_mad(msg); | |
316 | } | |
317 | ||
318 | static void * cm_copy_private_data(const void *private_data, | |
319 | u8 private_data_len) | |
320 | { | |
321 | void *data; | |
322 | ||
323 | if (!private_data || !private_data_len) | |
324 | return NULL; | |
325 | ||
bed8bdfd | 326 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
a977049d HR |
327 | if (!data) |
328 | return ERR_PTR(-ENOMEM); | |
329 | ||
a977049d HR |
330 | return data; |
331 | } | |
332 | ||
333 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
334 | void *private_data, u8 private_data_len) | |
335 | { | |
336 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
337 | kfree(cm_id_priv->private_data); | |
338 | ||
339 | cm_id_priv->private_data = private_data; | |
340 | cm_id_priv->private_data_len = private_data_len; | |
341 | } | |
342 | ||
ca222c6b SH |
343 | static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
344 | struct ib_grh *grh, struct cm_av *av) | |
a977049d HR |
345 | { |
346 | av->port = port; | |
347 | av->pkey_index = wc->pkey_index; | |
d4c4196f | 348 | ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc, |
ca222c6b | 349 | grh, &av->ah_attr); |
a977049d HR |
350 | } |
351 | ||
352 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) | |
353 | { | |
354 | struct cm_device *cm_dev; | |
355 | struct cm_port *port = NULL; | |
356 | unsigned long flags; | |
357 | int ret; | |
358 | u8 p; | |
359 | ||
360 | read_lock_irqsave(&cm.device_lock, flags); | |
361 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
d4c4196f | 362 | if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid, |
a977049d | 363 | &p, NULL)) { |
9af57b7a | 364 | port = cm_dev->port[p-1]; |
a977049d HR |
365 | break; |
366 | } | |
367 | } | |
368 | read_unlock_irqrestore(&cm.device_lock, flags); | |
369 | ||
370 | if (!port) | |
371 | return -EINVAL; | |
372 | ||
d4c4196f | 373 | ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num, |
a977049d HR |
374 | be16_to_cpu(path->pkey), &av->pkey_index); |
375 | if (ret) | |
376 | return ret; | |
377 | ||
378 | av->port = port; | |
d4c4196f | 379 | ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path, |
ca222c6b | 380 | &av->ah_attr); |
1d846126 | 381 | av->timeout = path->packet_life_time + 1; |
dd5f03be MB |
382 | memcpy(av->smac, path->smac, sizeof(av->smac)); |
383 | ||
384 | av->valid = 1; | |
a977049d HR |
385 | return 0; |
386 | } | |
387 | ||
388 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
389 | { | |
390 | unsigned long flags; | |
3b069c5d | 391 | int id; |
a977049d | 392 | |
3b069c5d TH |
393 | idr_preload(GFP_KERNEL); |
394 | spin_lock_irqsave(&cm.lock, flags); | |
395 | ||
ab626d1a | 396 | id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT); |
3b069c5d TH |
397 | |
398 | spin_unlock_irqrestore(&cm.lock, flags); | |
399 | idr_preload_end(); | |
f06d2653 | 400 | |
1b90c137 | 401 | cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; |
3b069c5d | 402 | return id < 0 ? id : 0; |
a977049d HR |
403 | } |
404 | ||
97f52eb4 | 405 | static void cm_free_id(__be32 local_id) |
a977049d | 406 | { |
24be6e81 | 407 | spin_lock_irq(&cm.lock); |
f06d2653 SH |
408 | idr_remove(&cm.local_id_table, |
409 | (__force int) (local_id ^ cm.random_id_operand)); | |
24be6e81 | 410 | spin_unlock_irq(&cm.lock); |
a977049d HR |
411 | } |
412 | ||
97f52eb4 | 413 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
414 | { |
415 | struct cm_id_private *cm_id_priv; | |
416 | ||
f06d2653 SH |
417 | cm_id_priv = idr_find(&cm.local_id_table, |
418 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
419 | if (cm_id_priv) { |
420 | if (cm_id_priv->id.remote_id == remote_id) | |
421 | atomic_inc(&cm_id_priv->refcount); | |
422 | else | |
423 | cm_id_priv = NULL; | |
424 | } | |
425 | ||
426 | return cm_id_priv; | |
427 | } | |
428 | ||
97f52eb4 | 429 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
430 | { |
431 | struct cm_id_private *cm_id_priv; | |
a977049d | 432 | |
24be6e81 | 433 | spin_lock_irq(&cm.lock); |
a977049d | 434 | cm_id_priv = cm_get_id(local_id, remote_id); |
24be6e81 | 435 | spin_unlock_irq(&cm.lock); |
a977049d HR |
436 | |
437 | return cm_id_priv; | |
438 | } | |
439 | ||
6e61d04f SH |
440 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
441 | { | |
442 | int i; | |
443 | ||
444 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) | |
445 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & | |
446 | ((unsigned long *) mask)[i]; | |
447 | } | |
448 | ||
449 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
450 | struct ib_cm_compare_data *dst_data) | |
451 | { | |
452 | u8 src[IB_CM_COMPARE_SIZE]; | |
453 | u8 dst[IB_CM_COMPARE_SIZE]; | |
454 | ||
455 | if (!src_data || !dst_data) | |
456 | return 0; | |
457 | ||
458 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
459 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
460 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); | |
461 | } | |
462 | ||
463 | static int cm_compare_private_data(u8 *private_data, | |
464 | struct ib_cm_compare_data *dst_data) | |
465 | { | |
466 | u8 src[IB_CM_COMPARE_SIZE]; | |
467 | ||
468 | if (!dst_data) | |
469 | return 0; | |
470 | ||
471 | cm_mask_copy(src, private_data, dst_data->mask); | |
472 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); | |
473 | } | |
474 | ||
a88f4888 RD |
475 | /* |
476 | * Trivial helpers to strip endian annotation and compare; the | |
477 | * endianness doesn't actually matter since we just need a stable | |
478 | * order for the RB tree. | |
479 | */ | |
480 | static int be32_lt(__be32 a, __be32 b) | |
481 | { | |
482 | return (__force u32) a < (__force u32) b; | |
483 | } | |
484 | ||
485 | static int be32_gt(__be32 a, __be32 b) | |
486 | { | |
487 | return (__force u32) a > (__force u32) b; | |
488 | } | |
489 | ||
490 | static int be64_lt(__be64 a, __be64 b) | |
491 | { | |
492 | return (__force u64) a < (__force u64) b; | |
493 | } | |
494 | ||
495 | static int be64_gt(__be64 a, __be64 b) | |
496 | { | |
497 | return (__force u64) a > (__force u64) b; | |
498 | } | |
499 | ||
a977049d HR |
500 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
501 | { | |
502 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
503 | struct rb_node *parent = NULL; | |
504 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
505 | __be64 service_id = cm_id_priv->id.service_id; |
506 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 507 | int data_cmp; |
a977049d HR |
508 | |
509 | while (*link) { | |
510 | parent = *link; | |
511 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
512 | service_node); | |
6e61d04f SH |
513 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
514 | cur_cm_id_priv->compare_data); | |
a977049d | 515 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 516 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
517 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
518 | !data_cmp) | |
07d357d0 SH |
519 | return cur_cm_id_priv; |
520 | ||
521 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
522 | link = &(*link)->rb_left; | |
523 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
524 | link = &(*link)->rb_right; | |
a88f4888 | 525 | else if (be64_lt(service_id, cur_cm_id_priv->id.service_id)) |
a977049d | 526 | link = &(*link)->rb_left; |
a88f4888 | 527 | else if (be64_gt(service_id, cur_cm_id_priv->id.service_id)) |
6e61d04f SH |
528 | link = &(*link)->rb_right; |
529 | else if (data_cmp < 0) | |
530 | link = &(*link)->rb_left; | |
a977049d HR |
531 | else |
532 | link = &(*link)->rb_right; | |
533 | } | |
534 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
535 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
536 | return NULL; | |
537 | } | |
538 | ||
07d357d0 | 539 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f SH |
540 | __be64 service_id, |
541 | u8 *private_data) | |
a977049d HR |
542 | { |
543 | struct rb_node *node = cm.listen_service_table.rb_node; | |
544 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 545 | int data_cmp; |
a977049d HR |
546 | |
547 | while (node) { | |
548 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
549 | data_cmp = cm_compare_private_data(private_data, |
550 | cm_id_priv->compare_data); | |
a977049d | 551 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 552 | cm_id_priv->id.service_id && |
6e61d04f | 553 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 554 | return cm_id_priv; |
07d357d0 SH |
555 | |
556 | if (device < cm_id_priv->id.device) | |
557 | node = node->rb_left; | |
558 | else if (device > cm_id_priv->id.device) | |
559 | node = node->rb_right; | |
a88f4888 | 560 | else if (be64_lt(service_id, cm_id_priv->id.service_id)) |
a977049d | 561 | node = node->rb_left; |
a88f4888 | 562 | else if (be64_gt(service_id, cm_id_priv->id.service_id)) |
6e61d04f SH |
563 | node = node->rb_right; |
564 | else if (data_cmp < 0) | |
565 | node = node->rb_left; | |
a977049d HR |
566 | else |
567 | node = node->rb_right; | |
568 | } | |
569 | return NULL; | |
570 | } | |
571 | ||
572 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
573 | *timewait_info) | |
574 | { | |
575 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
576 | struct rb_node *parent = NULL; | |
577 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
578 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
579 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
580 | |
581 | while (*link) { | |
582 | parent = *link; | |
583 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
584 | remote_id_node); | |
a88f4888 | 585 | if (be32_lt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 586 | link = &(*link)->rb_left; |
a88f4888 | 587 | else if (be32_gt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 588 | link = &(*link)->rb_right; |
a88f4888 | 589 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 590 | link = &(*link)->rb_left; |
a88f4888 | 591 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
592 | link = &(*link)->rb_right; |
593 | else | |
594 | return cur_timewait_info; | |
595 | } | |
596 | timewait_info->inserted_remote_id = 1; | |
597 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
598 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
599 | return NULL; | |
600 | } | |
601 | ||
97f52eb4 SH |
602 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
603 | __be32 remote_id) | |
a977049d HR |
604 | { |
605 | struct rb_node *node = cm.remote_id_table.rb_node; | |
606 | struct cm_timewait_info *timewait_info; | |
607 | ||
608 | while (node) { | |
609 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
610 | remote_id_node); | |
a88f4888 | 611 | if (be32_lt(remote_id, timewait_info->work.remote_id)) |
a977049d | 612 | node = node->rb_left; |
a88f4888 | 613 | else if (be32_gt(remote_id, timewait_info->work.remote_id)) |
a977049d | 614 | node = node->rb_right; |
a88f4888 | 615 | else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d | 616 | node = node->rb_left; |
a88f4888 | 617 | else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d HR |
618 | node = node->rb_right; |
619 | else | |
620 | return timewait_info; | |
621 | } | |
622 | return NULL; | |
623 | } | |
624 | ||
625 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
626 | *timewait_info) | |
627 | { | |
628 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
629 | struct rb_node *parent = NULL; | |
630 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
631 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
632 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
633 | |
634 | while (*link) { | |
635 | parent = *link; | |
636 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
637 | remote_qp_node); | |
a88f4888 | 638 | if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 639 | link = &(*link)->rb_left; |
a88f4888 | 640 | else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 641 | link = &(*link)->rb_right; |
a88f4888 | 642 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 643 | link = &(*link)->rb_left; |
a88f4888 | 644 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
645 | link = &(*link)->rb_right; |
646 | else | |
647 | return cur_timewait_info; | |
648 | } | |
649 | timewait_info->inserted_remote_qp = 1; | |
650 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
651 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
652 | return NULL; | |
653 | } | |
654 | ||
655 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
656 | *cm_id_priv) | |
657 | { | |
658 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
659 | struct rb_node *parent = NULL; | |
660 | struct cm_id_private *cur_cm_id_priv; | |
661 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 662 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
663 | |
664 | while (*link) { | |
665 | parent = *link; | |
666 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
667 | sidr_id_node); | |
a88f4888 | 668 | if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d | 669 | link = &(*link)->rb_left; |
a88f4888 | 670 | else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d HR |
671 | link = &(*link)->rb_right; |
672 | else { | |
673 | int cmp; | |
674 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
675 | sizeof *port_gid); | |
676 | if (cmp < 0) | |
677 | link = &(*link)->rb_left; | |
678 | else if (cmp > 0) | |
679 | link = &(*link)->rb_right; | |
680 | else | |
681 | return cur_cm_id_priv; | |
682 | } | |
683 | } | |
684 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
685 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
686 | return NULL; | |
687 | } | |
688 | ||
689 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
690 | enum ib_cm_sidr_status status) | |
691 | { | |
692 | struct ib_cm_sidr_rep_param param; | |
693 | ||
694 | memset(¶m, 0, sizeof param); | |
695 | param.status = status; | |
696 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
697 | } | |
698 | ||
07d357d0 SH |
699 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
700 | ib_cm_handler cm_handler, | |
a977049d HR |
701 | void *context) |
702 | { | |
703 | struct cm_id_private *cm_id_priv; | |
704 | int ret; | |
705 | ||
de6eb66b | 706 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
707 | if (!cm_id_priv) |
708 | return ERR_PTR(-ENOMEM); | |
709 | ||
a977049d | 710 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 711 | cm_id_priv->id.device = device; |
a977049d HR |
712 | cm_id_priv->id.cm_handler = cm_handler; |
713 | cm_id_priv->id.context = context; | |
354ba39c | 714 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
715 | ret = cm_alloc_id(cm_id_priv); |
716 | if (ret) | |
717 | goto error; | |
718 | ||
719 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 720 | init_completion(&cm_id_priv->comp); |
a977049d HR |
721 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
722 | atomic_set(&cm_id_priv->work_count, -1); | |
723 | atomic_set(&cm_id_priv->refcount, 1); | |
724 | return &cm_id_priv->id; | |
725 | ||
726 | error: | |
727 | kfree(cm_id_priv); | |
728 | return ERR_PTR(-ENOMEM); | |
729 | } | |
730 | EXPORT_SYMBOL(ib_create_cm_id); | |
731 | ||
732 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
733 | { | |
734 | struct cm_work *work; | |
735 | ||
736 | if (list_empty(&cm_id_priv->work_list)) | |
737 | return NULL; | |
738 | ||
739 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
740 | list_del(&work->list); | |
741 | return work; | |
742 | } | |
743 | ||
744 | static void cm_free_work(struct cm_work *work) | |
745 | { | |
746 | if (work->mad_recv_wc) | |
747 | ib_free_recv_mad(work->mad_recv_wc); | |
748 | kfree(work); | |
749 | } | |
750 | ||
751 | static inline int cm_convert_to_ms(int iba_time) | |
752 | { | |
753 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
754 | return 1 << max(iba_time - 8, 0); | |
755 | } | |
756 | ||
1d846126 SH |
757 | /* |
758 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time | |
759 | * Because of how ack_timeout is stored, adding one doubles the timeout. | |
760 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and | |
761 | * increment it (round up) only if the other is within 50%. | |
762 | */ | |
763 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) | |
764 | { | |
765 | int ack_timeout = packet_life_time + 1; | |
766 | ||
767 | if (ack_timeout >= ca_ack_delay) | |
768 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); | |
769 | else | |
770 | ack_timeout = ca_ack_delay + | |
771 | (ack_timeout >= (ca_ack_delay - 1)); | |
772 | ||
773 | return min(31, ack_timeout); | |
774 | } | |
775 | ||
a977049d HR |
776 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
777 | { | |
a977049d HR |
778 | if (timewait_info->inserted_remote_id) { |
779 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
780 | timewait_info->inserted_remote_id = 0; | |
781 | } | |
782 | ||
783 | if (timewait_info->inserted_remote_qp) { | |
784 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
785 | timewait_info->inserted_remote_qp = 0; | |
786 | } | |
a977049d HR |
787 | } |
788 | ||
97f52eb4 | 789 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
790 | { |
791 | struct cm_timewait_info *timewait_info; | |
792 | ||
de6eb66b | 793 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
794 | if (!timewait_info) |
795 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
796 | |
797 | timewait_info->work.local_id = local_id; | |
c4028958 | 798 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
a977049d HR |
799 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
800 | return timewait_info; | |
801 | } | |
802 | ||
803 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
804 | { | |
805 | int wait_time; | |
8575329d | 806 | unsigned long flags; |
a977049d | 807 | |
8575329d | 808 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 809 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
810 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
811 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 812 | |
a977049d HR |
813 | /* |
814 | * The cm_id could be destroyed by the user before we exit timewait. | |
815 | * To protect against this, we search for the cm_id after exiting | |
816 | * timewait before notifying the user that we've exited timewait. | |
817 | */ | |
818 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
1d846126 | 819 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d HR |
820 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
821 | msecs_to_jiffies(wait_time)); | |
822 | cm_id_priv->timewait_info = NULL; | |
823 | } | |
824 | ||
825 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
826 | { | |
8575329d SH |
827 | unsigned long flags; |
828 | ||
a977049d HR |
829 | cm_id_priv->id.state = IB_CM_IDLE; |
830 | if (cm_id_priv->timewait_info) { | |
8575329d | 831 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 832 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 833 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
834 | kfree(cm_id_priv->timewait_info); |
835 | cm_id_priv->timewait_info = NULL; | |
836 | } | |
837 | } | |
838 | ||
04c33543 | 839 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
840 | { |
841 | struct cm_id_private *cm_id_priv; | |
842 | struct cm_work *work; | |
a977049d HR |
843 | |
844 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
845 | retest: | |
24be6e81 | 846 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
847 | switch (cm_id->state) { |
848 | case IB_CM_LISTEN: | |
849 | cm_id->state = IB_CM_IDLE; | |
24be6e81 SH |
850 | spin_unlock_irq(&cm_id_priv->lock); |
851 | spin_lock_irq(&cm.lock); | |
a977049d | 852 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
24be6e81 | 853 | spin_unlock_irq(&cm.lock); |
a977049d HR |
854 | break; |
855 | case IB_CM_SIDR_REQ_SENT: | |
856 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 857 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 858 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
859 | break; |
860 | case IB_CM_SIDR_REQ_RCVD: | |
24be6e81 | 861 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
862 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
863 | break; | |
864 | case IB_CM_REQ_SENT: | |
227eca83 | 865 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 866 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 | 867 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
e971b8cd SH |
868 | &cm_id_priv->id.device->node_guid, |
869 | sizeof cm_id_priv->id.device->node_guid, | |
227eca83 SH |
870 | NULL, 0); |
871 | break; | |
04c33543 MT |
872 | case IB_CM_REQ_RCVD: |
873 | if (err == -ENOMEM) { | |
874 | /* Do not reject to allow future retries. */ | |
875 | cm_reset_to_idle(cm_id_priv); | |
24be6e81 | 876 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 | 877 | } else { |
24be6e81 | 878 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 MT |
879 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
880 | NULL, 0, NULL, 0); | |
881 | } | |
882 | break; | |
a977049d HR |
883 | case IB_CM_MRA_REQ_RCVD: |
884 | case IB_CM_REP_SENT: | |
885 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 886 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 887 | /* Fall through */ |
a977049d HR |
888 | case IB_CM_MRA_REQ_SENT: |
889 | case IB_CM_REP_RCVD: | |
890 | case IB_CM_MRA_REP_SENT: | |
24be6e81 | 891 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 SH |
892 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
893 | NULL, 0, NULL, 0); | |
a977049d HR |
894 | break; |
895 | case IB_CM_ESTABLISHED: | |
24be6e81 | 896 | spin_unlock_irq(&cm_id_priv->lock); |
2622e18e SH |
897 | if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) |
898 | break; | |
a977049d HR |
899 | ib_send_cm_dreq(cm_id, NULL, 0); |
900 | goto retest; | |
901 | case IB_CM_DREQ_SENT: | |
34816ad9 | 902 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 903 | cm_enter_timewait(cm_id_priv); |
24be6e81 | 904 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
905 | break; |
906 | case IB_CM_DREQ_RCVD: | |
24be6e81 | 907 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
908 | ib_send_cm_drep(cm_id, NULL, 0); |
909 | break; | |
910 | default: | |
24be6e81 | 911 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
912 | break; |
913 | } | |
914 | ||
915 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
916 | cm_deref_id(cm_id_priv); |
917 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
918 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
919 | cm_free_work(work); | |
6e61d04f SH |
920 | kfree(cm_id_priv->compare_data); |
921 | kfree(cm_id_priv->private_data); | |
a977049d HR |
922 | kfree(cm_id_priv); |
923 | } | |
04c33543 MT |
924 | |
925 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
926 | { | |
927 | cm_destroy_id(cm_id, 0); | |
928 | } | |
a977049d HR |
929 | EXPORT_SYMBOL(ib_destroy_cm_id); |
930 | ||
6e61d04f SH |
931 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
932 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
933 | { |
934 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
935 | unsigned long flags; | |
936 | int ret = 0; | |
937 | ||
9c3da099 | 938 | service_mask = service_mask ? service_mask : ~cpu_to_be64(0); |
a977049d HR |
939 | service_id &= service_mask; |
940 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
941 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
942 | return -EINVAL; | |
943 | ||
944 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
945 | if (cm_id->state != IB_CM_IDLE) |
946 | return -EINVAL; | |
947 | ||
948 | if (compare_data) { | |
949 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
950 | GFP_KERNEL); | |
951 | if (!cm_id_priv->compare_data) | |
952 | return -ENOMEM; | |
953 | cm_mask_copy(cm_id_priv->compare_data->data, | |
954 | compare_data->data, compare_data->mask); | |
955 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
956 | IB_CM_COMPARE_SIZE); | |
957 | } | |
a977049d HR |
958 | |
959 | cm_id->state = IB_CM_LISTEN; | |
960 | ||
961 | spin_lock_irqsave(&cm.lock, flags); | |
962 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 | 963 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
9c3da099 | 964 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
965 | } else { |
966 | cm_id->service_id = service_id; | |
967 | cm_id->service_mask = service_mask; | |
968 | } | |
969 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
970 | spin_unlock_irqrestore(&cm.lock, flags); | |
971 | ||
972 | if (cur_cm_id_priv) { | |
973 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
974 | kfree(cm_id_priv->compare_data); |
975 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
976 | ret = -EBUSY; |
977 | } | |
978 | return ret; | |
979 | } | |
980 | EXPORT_SYMBOL(ib_cm_listen); | |
981 | ||
97f52eb4 SH |
982 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
983 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
984 | { |
985 | u64 hi_tid, low_tid; | |
986 | ||
987 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
988 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
989 | (msg_seq << 30)); | |
a977049d HR |
990 | return cpu_to_be64(hi_tid | low_tid); |
991 | } | |
992 | ||
993 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 994 | __be16 attr_id, __be64 tid) |
a977049d HR |
995 | { |
996 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
997 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
998 | hdr->class_version = IB_CM_CLASS_VERSION; | |
999 | hdr->method = IB_MGMT_METHOD_SEND; | |
1000 | hdr->attr_id = attr_id; | |
1001 | hdr->tid = tid; | |
1002 | } | |
1003 | ||
1004 | static void cm_format_req(struct cm_req_msg *req_msg, | |
1005 | struct cm_id_private *cm_id_priv, | |
1006 | struct ib_cm_req_param *param) | |
1007 | { | |
3971c9f6 SH |
1008 | struct ib_sa_path_rec *pri_path = param->primary_path; |
1009 | struct ib_sa_path_rec *alt_path = param->alternate_path; | |
1010 | ||
a977049d HR |
1011 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
1012 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
1013 | ||
1014 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
1015 | req_msg->service_id = param->service_id; | |
e971b8cd | 1016 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1017 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
a977049d HR |
1018 | cm_req_set_init_depth(req_msg, param->initiator_depth); |
1019 | cm_req_set_remote_resp_timeout(req_msg, | |
1020 | param->remote_cm_response_timeout); | |
1021 | cm_req_set_qp_type(req_msg, param->qp_type); | |
1022 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
1023 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
1024 | cm_req_set_local_resp_timeout(req_msg, | |
1025 | param->local_cm_response_timeout); | |
a977049d HR |
1026 | req_msg->pkey = param->primary_path->pkey; |
1027 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
a977049d | 1028 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); |
d26a360b SH |
1029 | |
1030 | if (param->qp_type != IB_QPT_XRC_INI) { | |
1031 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
1032 | cm_req_set_retry_count(req_msg, param->retry_count); | |
1033 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
1034 | cm_req_set_srq(req_msg, param->srq); | |
1035 | } | |
a977049d | 1036 | |
3971c9f6 SH |
1037 | if (pri_path->hop_limit <= 1) { |
1038 | req_msg->primary_local_lid = pri_path->slid; | |
1039 | req_msg->primary_remote_lid = pri_path->dlid; | |
1040 | } else { | |
1041 | /* Work-around until there's a way to obtain remote LID info */ | |
1042 | req_msg->primary_local_lid = IB_LID_PERMISSIVE; | |
1043 | req_msg->primary_remote_lid = IB_LID_PERMISSIVE; | |
1044 | } | |
1045 | req_msg->primary_local_gid = pri_path->sgid; | |
1046 | req_msg->primary_remote_gid = pri_path->dgid; | |
1047 | cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); | |
1048 | cm_req_set_primary_packet_rate(req_msg, pri_path->rate); | |
1049 | req_msg->primary_traffic_class = pri_path->traffic_class; | |
1050 | req_msg->primary_hop_limit = pri_path->hop_limit; | |
1051 | cm_req_set_primary_sl(req_msg, pri_path->sl); | |
1052 | cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); | |
a977049d | 1053 | cm_req_set_primary_local_ack_timeout(req_msg, |
1d846126 | 1054 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1055 | pri_path->packet_life_time)); |
a977049d | 1056 | |
3971c9f6 SH |
1057 | if (alt_path) { |
1058 | if (alt_path->hop_limit <= 1) { | |
1059 | req_msg->alt_local_lid = alt_path->slid; | |
1060 | req_msg->alt_remote_lid = alt_path->dlid; | |
1061 | } else { | |
1062 | req_msg->alt_local_lid = IB_LID_PERMISSIVE; | |
1063 | req_msg->alt_remote_lid = IB_LID_PERMISSIVE; | |
1064 | } | |
1065 | req_msg->alt_local_gid = alt_path->sgid; | |
1066 | req_msg->alt_remote_gid = alt_path->dgid; | |
a977049d | 1067 | cm_req_set_alt_flow_label(req_msg, |
3971c9f6 SH |
1068 | alt_path->flow_label); |
1069 | cm_req_set_alt_packet_rate(req_msg, alt_path->rate); | |
1070 | req_msg->alt_traffic_class = alt_path->traffic_class; | |
1071 | req_msg->alt_hop_limit = alt_path->hop_limit; | |
1072 | cm_req_set_alt_sl(req_msg, alt_path->sl); | |
1073 | cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); | |
a977049d | 1074 | cm_req_set_alt_local_ack_timeout(req_msg, |
1d846126 | 1075 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1076 | alt_path->packet_life_time)); |
a977049d HR |
1077 | } |
1078 | ||
1079 | if (param->private_data && param->private_data_len) | |
1080 | memcpy(req_msg->private_data, param->private_data, | |
1081 | param->private_data_len); | |
1082 | } | |
1083 | ||
858119e1 | 1084 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
1085 | { |
1086 | /* peer-to-peer not supported */ | |
1087 | if (param->peer_to_peer) | |
1088 | return -EINVAL; | |
1089 | ||
1090 | if (!param->primary_path) | |
1091 | return -EINVAL; | |
1092 | ||
d26a360b SH |
1093 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC && |
1094 | param->qp_type != IB_QPT_XRC_INI) | |
a977049d HR |
1095 | return -EINVAL; |
1096 | ||
1097 | if (param->private_data && | |
1098 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | if (param->alternate_path && | |
1102 | (param->alternate_path->pkey != param->primary_path->pkey || | |
1103 | param->alternate_path->mtu != param->primary_path->mtu)) | |
1104 | return -EINVAL; | |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
1110 | struct ib_cm_req_param *param) | |
1111 | { | |
1112 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1113 | struct cm_req_msg *req_msg; |
1114 | unsigned long flags; | |
1115 | int ret; | |
1116 | ||
1117 | ret = cm_validate_req_param(param); | |
1118 | if (ret) | |
1119 | return ret; | |
1120 | ||
1121 | /* Verify that we're not in timewait. */ | |
1122 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1123 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1124 | if (cm_id->state != IB_CM_IDLE) { | |
1125 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1126 | ret = -EINVAL; | |
1127 | goto out; | |
1128 | } | |
1129 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1130 | ||
1131 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1132 | id.local_id); | |
75df23e2 SH |
1133 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1134 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 1135 | goto out; |
75df23e2 | 1136 | } |
a977049d HR |
1137 | |
1138 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
1139 | if (ret) | |
1140 | goto error1; | |
1141 | if (param->alternate_path) { | |
1142 | ret = cm_init_av_by_path(param->alternate_path, | |
1143 | &cm_id_priv->alt_av); | |
1144 | if (ret) | |
1145 | goto error1; | |
1146 | } | |
1147 | cm_id->service_id = param->service_id; | |
9c3da099 | 1148 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
1149 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1150 | param->primary_path->packet_life_time) * 2 + | |
1151 | cm_convert_to_ms( | |
1152 | param->remote_cm_response_timeout); | |
1153 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1154 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1155 | cm_id_priv->responder_resources = param->responder_resources; | |
1156 | cm_id_priv->retry_count = param->retry_count; | |
1157 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1158 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1159 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1160 | |
1161 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1162 | if (ret) | |
1163 | goto error1; | |
1164 | ||
1165 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1166 | cm_format_req(req_msg, cm_id_priv, param); | |
1167 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1168 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1169 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1170 | ||
1171 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1172 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
a977049d HR |
1173 | |
1174 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1175 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1176 | if (ret) { |
1177 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1178 | goto error2; | |
1179 | } | |
1180 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1181 | cm_id->state = IB_CM_REQ_SENT; | |
1182 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1183 | return 0; | |
1184 | ||
1185 | error2: cm_free_msg(cm_id_priv->msg); | |
1186 | error1: kfree(cm_id_priv->timewait_info); | |
1187 | out: return ret; | |
1188 | } | |
1189 | EXPORT_SYMBOL(ib_send_cm_req); | |
1190 | ||
1191 | static int cm_issue_rej(struct cm_port *port, | |
1192 | struct ib_mad_recv_wc *mad_recv_wc, | |
1193 | enum ib_cm_rej_reason reason, | |
1194 | enum cm_msg_response msg_rejected, | |
1195 | void *ari, u8 ari_length) | |
1196 | { | |
1197 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1198 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1199 | int ret; | |
1200 | ||
1201 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1202 | if (ret) | |
1203 | return ret; | |
1204 | ||
1205 | /* We just need common CM header information. Cast to any message. */ | |
1206 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1207 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1208 | ||
1209 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1210 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1211 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1212 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1213 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1214 | |
1215 | if (ari && ari_length) { | |
1216 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1217 | memcpy(rej_msg->ari, ari, ari_length); | |
1218 | } | |
1219 | ||
34816ad9 | 1220 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1221 | if (ret) |
1222 | cm_free_msg(msg); | |
1223 | ||
1224 | return ret; | |
1225 | } | |
1226 | ||
97f52eb4 SH |
1227 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1228 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1229 | { |
1230 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1231 | ((local_ca_guid == remote_ca_guid) && | |
1232 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1233 | } | |
1234 | ||
858119e1 | 1235 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1236 | struct ib_sa_path_rec *primary_path, |
1237 | struct ib_sa_path_rec *alt_path) | |
1238 | { | |
1239 | memset(primary_path, 0, sizeof *primary_path); | |
1240 | primary_path->dgid = req_msg->primary_local_gid; | |
1241 | primary_path->sgid = req_msg->primary_remote_gid; | |
1242 | primary_path->dlid = req_msg->primary_local_lid; | |
1243 | primary_path->slid = req_msg->primary_remote_lid; | |
1244 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1245 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1246 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1247 | primary_path->reversible = 1; | |
1248 | primary_path->pkey = req_msg->pkey; | |
1249 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1250 | primary_path->mtu_selector = IB_SA_EQ; | |
1251 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1252 | primary_path->rate_selector = IB_SA_EQ; | |
1253 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1254 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1255 | primary_path->packet_life_time = | |
1256 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1257 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1258 | ||
1259 | if (req_msg->alt_local_lid) { | |
1260 | memset(alt_path, 0, sizeof *alt_path); | |
1261 | alt_path->dgid = req_msg->alt_local_gid; | |
1262 | alt_path->sgid = req_msg->alt_remote_gid; | |
1263 | alt_path->dlid = req_msg->alt_local_lid; | |
1264 | alt_path->slid = req_msg->alt_remote_lid; | |
1265 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1266 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1267 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1268 | alt_path->reversible = 1; | |
1269 | alt_path->pkey = req_msg->pkey; | |
1270 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1271 | alt_path->mtu_selector = IB_SA_EQ; | |
1272 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1273 | alt_path->rate_selector = IB_SA_EQ; | |
1274 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1275 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1276 | alt_path->packet_life_time = | |
1277 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1278 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | static void cm_format_req_event(struct cm_work *work, | |
1283 | struct cm_id_private *cm_id_priv, | |
1284 | struct ib_cm_id *listen_id) | |
1285 | { | |
1286 | struct cm_req_msg *req_msg; | |
1287 | struct ib_cm_req_event_param *param; | |
1288 | ||
1289 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1290 | param = &work->cm_event.param.req_rcvd; | |
1291 | param->listen_id = listen_id; | |
a977049d HR |
1292 | param->port = cm_id_priv->av.port->port_num; |
1293 | param->primary_path = &work->path[0]; | |
1294 | if (req_msg->alt_local_lid) | |
1295 | param->alternate_path = &work->path[1]; | |
1296 | else | |
1297 | param->alternate_path = NULL; | |
1298 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1299 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1300 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1301 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1302 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1303 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1304 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1305 | param->local_cm_response_timeout = | |
1306 | cm_req_get_remote_resp_timeout(req_msg); | |
1307 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1308 | param->remote_cm_response_timeout = | |
1309 | cm_req_get_local_resp_timeout(req_msg); | |
1310 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1311 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1312 | param->srq = cm_req_get_srq(req_msg); | |
1313 | work->cm_event.private_data = &req_msg->private_data; | |
1314 | } | |
1315 | ||
1316 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1317 | struct cm_work *work) | |
1318 | { | |
a977049d HR |
1319 | int ret; |
1320 | ||
1321 | /* We will typically only have the current event to report. */ | |
1322 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1323 | cm_free_work(work); | |
1324 | ||
1325 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1326 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1327 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1328 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1329 | BUG_ON(!work); |
1330 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1331 | &work->cm_event); | |
1332 | cm_free_work(work); | |
1333 | } | |
1334 | cm_deref_id(cm_id_priv); | |
1335 | if (ret) | |
04c33543 | 1336 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1337 | } |
1338 | ||
1339 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1340 | struct cm_id_private *cm_id_priv, | |
1341 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1342 | const void *private_data, u8 private_data_len) | |
1343 | { | |
1344 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1345 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1346 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1347 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1348 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1349 | ||
1350 | if (private_data && private_data_len) | |
1351 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1352 | } | |
1353 | ||
1354 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1355 | struct cm_id_private *cm_id_priv, | |
1356 | enum ib_cm_rej_reason reason, | |
1357 | void *ari, | |
1358 | u8 ari_length, | |
1359 | const void *private_data, | |
1360 | u8 private_data_len) | |
1361 | { | |
1362 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1363 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1364 | ||
1365 | switch(cm_id_priv->id.state) { | |
1366 | case IB_CM_REQ_RCVD: | |
1367 | rej_msg->local_comm_id = 0; | |
1368 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1369 | break; | |
1370 | case IB_CM_MRA_REQ_SENT: | |
1371 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1372 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1373 | break; | |
1374 | case IB_CM_REP_RCVD: | |
1375 | case IB_CM_MRA_REP_SENT: | |
1376 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1377 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1378 | break; | |
1379 | default: | |
1380 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1381 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1382 | break; | |
1383 | } | |
1384 | ||
97f52eb4 | 1385 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1386 | if (ari && ari_length) { |
1387 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1388 | memcpy(rej_msg->ari, ari, ari_length); | |
1389 | } | |
1390 | ||
1391 | if (private_data && private_data_len) | |
1392 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1393 | } | |
1394 | ||
1395 | static void cm_dup_req_handler(struct cm_work *work, | |
1396 | struct cm_id_private *cm_id_priv) | |
1397 | { | |
1398 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1399 | int ret; |
1400 | ||
9af57b7a SH |
1401 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1402 | counter[CM_REQ_COUNTER]); | |
1403 | ||
a977049d HR |
1404 | /* Quick state check to discard duplicate REQs. */ |
1405 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1406 | return; | |
1407 | ||
1408 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1409 | if (ret) | |
1410 | return; | |
1411 | ||
24be6e81 | 1412 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1413 | switch (cm_id_priv->id.state) { |
1414 | case IB_CM_MRA_REQ_SENT: | |
1415 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1416 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1417 | cm_id_priv->private_data, | |
1418 | cm_id_priv->private_data_len); | |
1419 | break; | |
1420 | case IB_CM_TIMEWAIT: | |
1421 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1422 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1423 | break; | |
1424 | default: | |
1425 | goto unlock; | |
1426 | } | |
24be6e81 | 1427 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1428 | |
34816ad9 | 1429 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1430 | if (ret) |
1431 | goto free; | |
1432 | return; | |
1433 | ||
24be6e81 | 1434 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1435 | free: cm_free_msg(msg); |
1436 | } | |
1437 | ||
1438 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1439 | struct cm_id_private *cm_id_priv) | |
1440 | { | |
1441 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1442 | struct cm_timewait_info *timewait_info; | |
1443 | struct cm_req_msg *req_msg; | |
a977049d HR |
1444 | |
1445 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1446 | ||
d998ccce | 1447 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1448 | spin_lock_irq(&cm.lock); |
a977049d | 1449 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d HR |
1450 | if (timewait_info) { |
1451 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1452 | timewait_info->work.remote_id); | |
24be6e81 | 1453 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1454 | if (cur_cm_id_priv) { |
1455 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1456 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1457 | } |
1458 | return NULL; | |
1459 | } | |
1460 | ||
1461 | /* Check for stale connections. */ | |
1462 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1463 | if (timewait_info) { | |
1464 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
24be6e81 | 1465 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1466 | cm_issue_rej(work->port, work->mad_recv_wc, |
1467 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1468 | NULL, 0); | |
1469 | return NULL; | |
a977049d HR |
1470 | } |
1471 | ||
1472 | /* Find matching listen request. */ | |
07d357d0 | 1473 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1474 | req_msg->service_id, |
1475 | req_msg->private_data); | |
a977049d | 1476 | if (!listen_cm_id_priv) { |
8575329d | 1477 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
24be6e81 | 1478 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1479 | cm_issue_rej(work->port, work->mad_recv_wc, |
1480 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1481 | NULL, 0); | |
8575329d | 1482 | goto out; |
a977049d HR |
1483 | } |
1484 | atomic_inc(&listen_cm_id_priv->refcount); | |
1485 | atomic_inc(&cm_id_priv->refcount); | |
1486 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1487 | atomic_inc(&cm_id_priv->work_count); | |
24be6e81 | 1488 | spin_unlock_irq(&cm.lock); |
8575329d | 1489 | out: |
a977049d | 1490 | return listen_cm_id_priv; |
a977049d HR |
1491 | } |
1492 | ||
3971c9f6 SH |
1493 | /* |
1494 | * Work-around for inter-subnet connections. If the LIDs are permissive, | |
1495 | * we need to override the LID/SL data in the REQ with the LID information | |
1496 | * in the work completion. | |
1497 | */ | |
1498 | static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) | |
1499 | { | |
1500 | if (!cm_req_get_primary_subnet_local(req_msg)) { | |
1501 | if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { | |
1502 | req_msg->primary_local_lid = cpu_to_be16(wc->slid); | |
1503 | cm_req_set_primary_sl(req_msg, wc->sl); | |
1504 | } | |
1505 | ||
1506 | if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) | |
1507 | req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1508 | } | |
1509 | ||
1510 | if (!cm_req_get_alt_subnet_local(req_msg)) { | |
1511 | if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { | |
1512 | req_msg->alt_local_lid = cpu_to_be16(wc->slid); | |
1513 | cm_req_set_alt_sl(req_msg, wc->sl); | |
1514 | } | |
1515 | ||
1516 | if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) | |
1517 | req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1518 | } | |
1519 | } | |
1520 | ||
a977049d HR |
1521 | static int cm_req_handler(struct cm_work *work) |
1522 | { | |
1523 | struct ib_cm_id *cm_id; | |
1524 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1525 | struct cm_req_msg *req_msg; | |
1526 | int ret; | |
1527 | ||
1528 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1529 | ||
d4c4196f | 1530 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
1531 | if (IS_ERR(cm_id)) |
1532 | return PTR_ERR(cm_id); | |
1533 | ||
1534 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1535 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1536 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1537 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1538 | &cm_id_priv->av); |
1539 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1540 | id.local_id); | |
1541 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1542 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1543 | goto destroy; |
a977049d HR |
1544 | } |
1545 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1546 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1547 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1548 | ||
1549 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1550 | if (!listen_cm_id_priv) { | |
1551 | ret = -EINVAL; | |
76842405 SH |
1552 | kfree(cm_id_priv->timewait_info); |
1553 | goto destroy; | |
a977049d HR |
1554 | } |
1555 | ||
1556 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1557 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1558 | cm_id_priv->id.service_id = req_msg->service_id; | |
9c3da099 | 1559 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d | 1560 | |
3971c9f6 | 1561 | cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
a977049d | 1562 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
dd5f03be MB |
1563 | |
1564 | memcpy(work->path[0].dmac, cm_id_priv->av.ah_attr.dmac, ETH_ALEN); | |
1565 | work->path[0].vlan_id = cm_id_priv->av.ah_attr.vlan_id; | |
a977049d | 1566 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); |
76842405 | 1567 | if (ret) { |
d4c4196f | 1568 | ib_get_cached_gid(work->port->cm_dev->ib_device, |
76842405 SH |
1569 | work->port->port_num, 0, &work->path[0].sgid); |
1570 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1571 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1572 | NULL, 0); | |
1573 | goto rejected; | |
1574 | } | |
a977049d HR |
1575 | if (req_msg->alt_local_lid) { |
1576 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1577 | if (ret) { |
1578 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1579 | &work->path[0].sgid, | |
1580 | sizeof work->path[0].sgid, NULL, 0); | |
1581 | goto rejected; | |
1582 | } | |
a977049d HR |
1583 | } |
1584 | cm_id_priv->tid = req_msg->hdr.tid; | |
1585 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1586 | cm_req_get_local_resp_timeout(req_msg)); | |
1587 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1588 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1589 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1590 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1591 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
e1444b5a | 1592 | cm_id_priv->pkey = req_msg->pkey; |
a977049d | 1593 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
a977049d HR |
1594 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
1595 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1596 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1597 | |
1598 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1599 | cm_process_work(cm_id_priv, work); | |
1600 | cm_deref_id(listen_cm_id_priv); | |
1601 | return 0; | |
1602 | ||
76842405 SH |
1603 | rejected: |
1604 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1605 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1606 | destroy: |
1607 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1608 | return ret; |
1609 | } | |
1610 | ||
1611 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1612 | struct cm_id_private *cm_id_priv, | |
1613 | struct ib_cm_rep_param *param) | |
1614 | { | |
1615 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1616 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1617 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
a977049d HR |
1618 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); |
1619 | rep_msg->resp_resources = param->responder_resources; | |
1d846126 SH |
1620 | cm_rep_set_target_ack_delay(rep_msg, |
1621 | cm_id_priv->av.port->cm_dev->ack_delay); | |
a977049d | 1622 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
a977049d | 1623 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); |
e971b8cd | 1624 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1625 | |
d26a360b SH |
1626 | if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) { |
1627 | rep_msg->initiator_depth = param->initiator_depth; | |
1628 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1629 | cm_rep_set_srq(rep_msg, param->srq); | |
ef700446 | 1630 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1631 | } else { |
1632 | cm_rep_set_srq(rep_msg, 1); | |
ef700446 | 1633 | cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1634 | } |
1635 | ||
a977049d HR |
1636 | if (param->private_data && param->private_data_len) |
1637 | memcpy(rep_msg->private_data, param->private_data, | |
1638 | param->private_data_len); | |
1639 | } | |
1640 | ||
1641 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1642 | struct ib_cm_rep_param *param) | |
1643 | { | |
1644 | struct cm_id_private *cm_id_priv; | |
1645 | struct ib_mad_send_buf *msg; | |
1646 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1647 | unsigned long flags; |
1648 | int ret; | |
1649 | ||
1650 | if (param->private_data && | |
1651 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1652 | return -EINVAL; | |
1653 | ||
1654 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1655 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1656 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1657 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1658 | ret = -EINVAL; | |
1659 | goto out; | |
1660 | } | |
1661 | ||
1662 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1663 | if (ret) | |
1664 | goto out; | |
1665 | ||
1666 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1667 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1668 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1669 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1670 | ||
34816ad9 | 1671 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1672 | if (ret) { |
1673 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1674 | cm_free_msg(msg); | |
1675 | return ret; | |
1676 | } | |
1677 | ||
1678 | cm_id->state = IB_CM_REP_SENT; | |
1679 | cm_id_priv->msg = msg; | |
1680 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1681 | cm_id_priv->responder_resources = param->responder_resources; | |
1682 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
ef700446 | 1683 | cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF); |
a977049d HR |
1684 | |
1685 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1686 | return ret; | |
1687 | } | |
1688 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1689 | ||
1690 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1691 | struct cm_id_private *cm_id_priv, | |
1692 | const void *private_data, | |
1693 | u8 private_data_len) | |
1694 | { | |
1695 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1696 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1697 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1698 | ||
1699 | if (private_data && private_data_len) | |
1700 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1701 | } | |
1702 | ||
1703 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1704 | const void *private_data, | |
1705 | u8 private_data_len) | |
1706 | { | |
1707 | struct cm_id_private *cm_id_priv; | |
1708 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1709 | unsigned long flags; |
1710 | void *data; | |
1711 | int ret; | |
1712 | ||
1713 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1714 | return -EINVAL; | |
1715 | ||
1716 | data = cm_copy_private_data(private_data, private_data_len); | |
1717 | if (IS_ERR(data)) | |
1718 | return PTR_ERR(data); | |
1719 | ||
1720 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1721 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1722 | if (cm_id->state != IB_CM_REP_RCVD && | |
1723 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1724 | ret = -EINVAL; | |
1725 | goto error; | |
1726 | } | |
1727 | ||
1728 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1729 | if (ret) | |
1730 | goto error; | |
1731 | ||
1732 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1733 | private_data, private_data_len); | |
1734 | ||
34816ad9 | 1735 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1736 | if (ret) { |
1737 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1738 | cm_free_msg(msg); | |
1739 | kfree(data); | |
1740 | return ret; | |
1741 | } | |
1742 | ||
1743 | cm_id->state = IB_CM_ESTABLISHED; | |
1744 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1745 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1746 | return 0; | |
1747 | ||
1748 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1749 | kfree(data); | |
1750 | return ret; | |
1751 | } | |
1752 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1753 | ||
ef700446 | 1754 | static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type) |
a977049d HR |
1755 | { |
1756 | struct cm_rep_msg *rep_msg; | |
1757 | struct ib_cm_rep_event_param *param; | |
1758 | ||
1759 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1760 | param = &work->cm_event.param.rep_rcvd; | |
1761 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1762 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
ef700446 | 1763 | param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type)); |
a977049d HR |
1764 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); |
1765 | param->responder_resources = rep_msg->initiator_depth; | |
1766 | param->initiator_depth = rep_msg->resp_resources; | |
1767 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1768 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1769 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1770 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1771 | param->srq = cm_rep_get_srq(rep_msg); | |
1772 | work->cm_event.private_data = &rep_msg->private_data; | |
1773 | } | |
1774 | ||
1775 | static void cm_dup_rep_handler(struct cm_work *work) | |
1776 | { | |
1777 | struct cm_id_private *cm_id_priv; | |
1778 | struct cm_rep_msg *rep_msg; | |
1779 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1780 | int ret; |
1781 | ||
1782 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1783 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1784 | rep_msg->local_comm_id); | |
1785 | if (!cm_id_priv) | |
1786 | return; | |
1787 | ||
9af57b7a SH |
1788 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1789 | counter[CM_REP_COUNTER]); | |
a977049d HR |
1790 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
1791 | if (ret) | |
1792 | goto deref; | |
1793 | ||
24be6e81 | 1794 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1795 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
1796 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1797 | cm_id_priv->private_data, | |
1798 | cm_id_priv->private_data_len); | |
1799 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1800 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1801 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1802 | cm_id_priv->private_data, | |
1803 | cm_id_priv->private_data_len); | |
1804 | else | |
1805 | goto unlock; | |
24be6e81 | 1806 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1807 | |
34816ad9 | 1808 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1809 | if (ret) |
1810 | goto free; | |
1811 | goto deref; | |
1812 | ||
24be6e81 | 1813 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1814 | free: cm_free_msg(msg); |
1815 | deref: cm_deref_id(cm_id_priv); | |
1816 | } | |
1817 | ||
1818 | static int cm_rep_handler(struct cm_work *work) | |
1819 | { | |
1820 | struct cm_id_private *cm_id_priv; | |
1821 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1822 | int ret; |
1823 | ||
1824 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1825 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1826 | if (!cm_id_priv) { | |
1827 | cm_dup_rep_handler(work); | |
1828 | return -EINVAL; | |
1829 | } | |
1830 | ||
ef700446 | 1831 | cm_format_rep_event(work, cm_id_priv->qp_type); |
87fd1a11 | 1832 | |
24be6e81 | 1833 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1834 | switch (cm_id_priv->id.state) { |
1835 | case IB_CM_REQ_SENT: | |
1836 | case IB_CM_MRA_REQ_RCVD: | |
1837 | break; | |
1838 | default: | |
24be6e81 | 1839 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1840 | ret = -EINVAL; |
1841 | goto error; | |
1842 | } | |
1843 | ||
a977049d HR |
1844 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1845 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
ef700446 | 1846 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d | 1847 | |
87fd1a11 | 1848 | spin_lock(&cm.lock); |
a977049d HR |
1849 | /* Check for duplicate REP. */ |
1850 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 1851 | spin_unlock(&cm.lock); |
24be6e81 | 1852 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1853 | ret = -EINVAL; |
1854 | goto error; | |
1855 | } | |
1856 | /* Check for a stale connection. */ | |
1857 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1858 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1859 | &cm.remote_id_table); | |
1860 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1861 | spin_unlock(&cm.lock); | |
24be6e81 | 1862 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1863 | cm_issue_rej(work->port, work->mad_recv_wc, |
1864 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1865 | NULL, 0); | |
1866 | ret = -EINVAL; | |
1867 | goto error; | |
1868 | } | |
87fd1a11 | 1869 | spin_unlock(&cm.lock); |
a977049d | 1870 | |
a977049d HR |
1871 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1872 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
ef700446 | 1873 | cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d HR |
1874 | cm_id_priv->initiator_depth = rep_msg->resp_resources; |
1875 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1876 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1877 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1d846126 SH |
1878 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
1879 | cm_id_priv->av.timeout = | |
1880 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1881 | cm_id_priv->av.timeout - 1); | |
1882 | cm_id_priv->alt_av.timeout = | |
1883 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1884 | cm_id_priv->alt_av.timeout - 1); | |
a977049d HR |
1885 | |
1886 | /* todo: handle peer_to_peer */ | |
1887 | ||
34816ad9 | 1888 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1889 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1890 | if (!ret) | |
1891 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1892 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1893 | |
1894 | if (ret) | |
1895 | cm_process_work(cm_id_priv, work); | |
1896 | else | |
1897 | cm_deref_id(cm_id_priv); | |
1898 | return 0; | |
1899 | ||
87fd1a11 | 1900 | error: |
a977049d HR |
1901 | cm_deref_id(cm_id_priv); |
1902 | return ret; | |
1903 | } | |
1904 | ||
1905 | static int cm_establish_handler(struct cm_work *work) | |
1906 | { | |
1907 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1908 | int ret; |
1909 | ||
e1444b5a | 1910 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
1911 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
1912 | if (!cm_id_priv) | |
1913 | return -EINVAL; | |
1914 | ||
24be6e81 | 1915 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1916 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 1917 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1918 | goto out; |
1919 | } | |
1920 | ||
34816ad9 | 1921 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1922 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1923 | if (!ret) | |
1924 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1925 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1926 | |
1927 | if (ret) | |
1928 | cm_process_work(cm_id_priv, work); | |
1929 | else | |
1930 | cm_deref_id(cm_id_priv); | |
1931 | return 0; | |
1932 | out: | |
1933 | cm_deref_id(cm_id_priv); | |
1934 | return -EINVAL; | |
1935 | } | |
1936 | ||
1937 | static int cm_rtu_handler(struct cm_work *work) | |
1938 | { | |
1939 | struct cm_id_private *cm_id_priv; | |
1940 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
1941 | int ret; |
1942 | ||
1943 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1944 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1945 | rtu_msg->local_comm_id); | |
1946 | if (!cm_id_priv) | |
1947 | return -EINVAL; | |
1948 | ||
1949 | work->cm_event.private_data = &rtu_msg->private_data; | |
1950 | ||
24be6e81 | 1951 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1952 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
1953 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 1954 | spin_unlock_irq(&cm_id_priv->lock); |
9af57b7a SH |
1955 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1956 | counter[CM_RTU_COUNTER]); | |
a977049d HR |
1957 | goto out; |
1958 | } | |
1959 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1960 | ||
34816ad9 | 1961 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1962 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1963 | if (!ret) | |
1964 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1965 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1966 | |
1967 | if (ret) | |
1968 | cm_process_work(cm_id_priv, work); | |
1969 | else | |
1970 | cm_deref_id(cm_id_priv); | |
1971 | return 0; | |
1972 | out: | |
1973 | cm_deref_id(cm_id_priv); | |
1974 | return -EINVAL; | |
1975 | } | |
1976 | ||
1977 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1978 | struct cm_id_private *cm_id_priv, | |
1979 | const void *private_data, | |
1980 | u8 private_data_len) | |
1981 | { | |
1982 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
1983 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
1984 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
1985 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1986 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
1987 | ||
1988 | if (private_data && private_data_len) | |
1989 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
1990 | } | |
1991 | ||
1992 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
1993 | const void *private_data, | |
1994 | u8 private_data_len) | |
1995 | { | |
1996 | struct cm_id_private *cm_id_priv; | |
1997 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1998 | unsigned long flags; |
1999 | int ret; | |
2000 | ||
2001 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
2002 | return -EINVAL; | |
2003 | ||
2004 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2005 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2006 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
2007 | ret = -EINVAL; | |
2008 | goto out; | |
2009 | } | |
2010 | ||
8d8ac865 SH |
2011 | if (cm_id->lap_state == IB_CM_LAP_SENT || |
2012 | cm_id->lap_state == IB_CM_MRA_LAP_RCVD) | |
2013 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2014 | ||
a977049d HR |
2015 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2016 | if (ret) { | |
2017 | cm_enter_timewait(cm_id_priv); | |
2018 | goto out; | |
2019 | } | |
2020 | ||
2021 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
2022 | private_data, private_data_len); | |
34816ad9 | 2023 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2024 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
2025 | ||
34816ad9 | 2026 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2027 | if (ret) { |
2028 | cm_enter_timewait(cm_id_priv); | |
2029 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2030 | cm_free_msg(msg); | |
2031 | return ret; | |
2032 | } | |
2033 | ||
2034 | cm_id->state = IB_CM_DREQ_SENT; | |
2035 | cm_id_priv->msg = msg; | |
2036 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2037 | return ret; | |
2038 | } | |
2039 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
2040 | ||
2041 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
2042 | struct cm_id_private *cm_id_priv, | |
2043 | const void *private_data, | |
2044 | u8 private_data_len) | |
2045 | { | |
2046 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
2047 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
2048 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2049 | ||
2050 | if (private_data && private_data_len) | |
2051 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
2052 | } | |
2053 | ||
2054 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
2055 | const void *private_data, | |
2056 | u8 private_data_len) | |
2057 | { | |
2058 | struct cm_id_private *cm_id_priv; | |
2059 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2060 | unsigned long flags; |
2061 | void *data; | |
2062 | int ret; | |
2063 | ||
2064 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
2065 | return -EINVAL; | |
2066 | ||
2067 | data = cm_copy_private_data(private_data, private_data_len); | |
2068 | if (IS_ERR(data)) | |
2069 | return PTR_ERR(data); | |
2070 | ||
2071 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2072 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2073 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
2074 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2075 | kfree(data); | |
2076 | return -EINVAL; | |
2077 | } | |
2078 | ||
2079 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2080 | cm_enter_timewait(cm_id_priv); | |
2081 | ||
2082 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2083 | if (ret) | |
2084 | goto out; | |
2085 | ||
2086 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2087 | private_data, private_data_len); | |
2088 | ||
34816ad9 | 2089 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2090 | if (ret) { |
2091 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2092 | cm_free_msg(msg); | |
2093 | return ret; | |
2094 | } | |
2095 | ||
2096 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2097 | return ret; | |
2098 | } | |
2099 | EXPORT_SYMBOL(ib_send_cm_drep); | |
2100 | ||
82a9c16a SH |
2101 | static int cm_issue_drep(struct cm_port *port, |
2102 | struct ib_mad_recv_wc *mad_recv_wc) | |
2103 | { | |
2104 | struct ib_mad_send_buf *msg = NULL; | |
2105 | struct cm_dreq_msg *dreq_msg; | |
2106 | struct cm_drep_msg *drep_msg; | |
2107 | int ret; | |
2108 | ||
2109 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
2110 | if (ret) | |
2111 | return ret; | |
2112 | ||
2113 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
2114 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
2115 | ||
2116 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
2117 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
2118 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
2119 | ||
2120 | ret = ib_post_send_mad(msg, NULL); | |
2121 | if (ret) | |
2122 | cm_free_msg(msg); | |
2123 | ||
2124 | return ret; | |
2125 | } | |
2126 | ||
a977049d HR |
2127 | static int cm_dreq_handler(struct cm_work *work) |
2128 | { | |
2129 | struct cm_id_private *cm_id_priv; | |
2130 | struct cm_dreq_msg *dreq_msg; | |
2131 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2132 | int ret; |
2133 | ||
2134 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
2135 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
2136 | dreq_msg->local_comm_id); | |
82a9c16a | 2137 | if (!cm_id_priv) { |
9af57b7a SH |
2138 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2139 | counter[CM_DREQ_COUNTER]); | |
82a9c16a | 2140 | cm_issue_drep(work->port, work->mad_recv_wc); |
a977049d | 2141 | return -EINVAL; |
82a9c16a | 2142 | } |
a977049d HR |
2143 | |
2144 | work->cm_event.private_data = &dreq_msg->private_data; | |
2145 | ||
24be6e81 | 2146 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2147 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
2148 | goto unlock; | |
2149 | ||
2150 | switch (cm_id_priv->id.state) { | |
2151 | case IB_CM_REP_SENT: | |
2152 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2153 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2154 | break; |
2155 | case IB_CM_ESTABLISHED: | |
8d8ac865 SH |
2156 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || |
2157 | cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2158 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2159 | break; | |
a977049d HR |
2160 | case IB_CM_MRA_REP_RCVD: |
2161 | break; | |
2162 | case IB_CM_TIMEWAIT: | |
9af57b7a SH |
2163 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2164 | counter[CM_DREQ_COUNTER]); | |
a977049d HR |
2165 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2166 | goto unlock; | |
2167 | ||
2168 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2169 | cm_id_priv->private_data, | |
2170 | cm_id_priv->private_data_len); | |
24be6e81 | 2171 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2172 | |
34816ad9 | 2173 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2174 | cm_free_msg(msg); |
2175 | goto deref; | |
9af57b7a SH |
2176 | case IB_CM_DREQ_RCVD: |
2177 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2178 | counter[CM_DREQ_COUNTER]); | |
2179 | goto unlock; | |
a977049d HR |
2180 | default: |
2181 | goto unlock; | |
2182 | } | |
2183 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
2184 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
2185 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2186 | if (!ret) | |
2187 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2188 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2189 | |
2190 | if (ret) | |
2191 | cm_process_work(cm_id_priv, work); | |
2192 | else | |
2193 | cm_deref_id(cm_id_priv); | |
2194 | return 0; | |
2195 | ||
24be6e81 | 2196 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2197 | deref: cm_deref_id(cm_id_priv); |
2198 | return -EINVAL; | |
2199 | } | |
2200 | ||
2201 | static int cm_drep_handler(struct cm_work *work) | |
2202 | { | |
2203 | struct cm_id_private *cm_id_priv; | |
2204 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2205 | int ret; |
2206 | ||
2207 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2208 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2209 | drep_msg->local_comm_id); | |
2210 | if (!cm_id_priv) | |
2211 | return -EINVAL; | |
2212 | ||
2213 | work->cm_event.private_data = &drep_msg->private_data; | |
2214 | ||
24be6e81 | 2215 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2216 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2217 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2218 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2219 | goto out; |
2220 | } | |
2221 | cm_enter_timewait(cm_id_priv); | |
2222 | ||
34816ad9 | 2223 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2224 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2225 | if (!ret) | |
2226 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2227 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2228 | |
2229 | if (ret) | |
2230 | cm_process_work(cm_id_priv, work); | |
2231 | else | |
2232 | cm_deref_id(cm_id_priv); | |
2233 | return 0; | |
2234 | out: | |
2235 | cm_deref_id(cm_id_priv); | |
2236 | return -EINVAL; | |
2237 | } | |
2238 | ||
2239 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2240 | enum ib_cm_rej_reason reason, | |
2241 | void *ari, | |
2242 | u8 ari_length, | |
2243 | const void *private_data, | |
2244 | u8 private_data_len) | |
2245 | { | |
2246 | struct cm_id_private *cm_id_priv; | |
2247 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2248 | unsigned long flags; |
2249 | int ret; | |
2250 | ||
2251 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2252 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2253 | return -EINVAL; | |
2254 | ||
2255 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2256 | ||
2257 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2258 | switch (cm_id->state) { | |
2259 | case IB_CM_REQ_SENT: | |
2260 | case IB_CM_MRA_REQ_RCVD: | |
2261 | case IB_CM_REQ_RCVD: | |
2262 | case IB_CM_MRA_REQ_SENT: | |
2263 | case IB_CM_REP_RCVD: | |
2264 | case IB_CM_MRA_REP_SENT: | |
2265 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2266 | if (!ret) | |
2267 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2268 | cm_id_priv, reason, ari, ari_length, | |
2269 | private_data, private_data_len); | |
2270 | ||
2271 | cm_reset_to_idle(cm_id_priv); | |
2272 | break; | |
2273 | case IB_CM_REP_SENT: | |
2274 | case IB_CM_MRA_REP_RCVD: | |
2275 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2276 | if (!ret) | |
2277 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2278 | cm_id_priv, reason, ari, ari_length, | |
2279 | private_data, private_data_len); | |
2280 | ||
2281 | cm_enter_timewait(cm_id_priv); | |
2282 | break; | |
2283 | default: | |
2284 | ret = -EINVAL; | |
2285 | goto out; | |
2286 | } | |
2287 | ||
2288 | if (ret) | |
2289 | goto out; | |
2290 | ||
34816ad9 | 2291 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2292 | if (ret) |
2293 | cm_free_msg(msg); | |
2294 | ||
2295 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2296 | return ret; | |
2297 | } | |
2298 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2299 | ||
2300 | static void cm_format_rej_event(struct cm_work *work) | |
2301 | { | |
2302 | struct cm_rej_msg *rej_msg; | |
2303 | struct ib_cm_rej_event_param *param; | |
2304 | ||
2305 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2306 | param = &work->cm_event.param.rej_rcvd; | |
2307 | param->ari = rej_msg->ari; | |
2308 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2309 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2310 | work->cm_event.private_data = &rej_msg->private_data; |
2311 | } | |
2312 | ||
2313 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2314 | { | |
2315 | struct cm_timewait_info *timewait_info; | |
2316 | struct cm_id_private *cm_id_priv; | |
97f52eb4 | 2317 | __be32 remote_id; |
a977049d HR |
2318 | |
2319 | remote_id = rej_msg->local_comm_id; | |
2320 | ||
97f52eb4 | 2321 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
24be6e81 | 2322 | spin_lock_irq(&cm.lock); |
97f52eb4 | 2323 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2324 | remote_id); |
2325 | if (!timewait_info) { | |
24be6e81 | 2326 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2327 | return NULL; |
2328 | } | |
f06d2653 SH |
2329 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2330 | (timewait_info->work.local_id ^ | |
2331 | cm.random_id_operand)); | |
a977049d HR |
2332 | if (cm_id_priv) { |
2333 | if (cm_id_priv->id.remote_id == remote_id) | |
2334 | atomic_inc(&cm_id_priv->refcount); | |
2335 | else | |
2336 | cm_id_priv = NULL; | |
2337 | } | |
24be6e81 | 2338 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2339 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
2340 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2341 | else | |
2342 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2343 | ||
2344 | return cm_id_priv; | |
2345 | } | |
2346 | ||
2347 | static int cm_rej_handler(struct cm_work *work) | |
2348 | { | |
2349 | struct cm_id_private *cm_id_priv; | |
2350 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
2351 | int ret; |
2352 | ||
2353 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2354 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2355 | if (!cm_id_priv) | |
2356 | return -EINVAL; | |
2357 | ||
2358 | cm_format_rej_event(work); | |
2359 | ||
24be6e81 | 2360 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2361 | switch (cm_id_priv->id.state) { |
2362 | case IB_CM_REQ_SENT: | |
2363 | case IB_CM_MRA_REQ_RCVD: | |
2364 | case IB_CM_REP_SENT: | |
2365 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2366 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2367 | /* fall through */ |
2368 | case IB_CM_REQ_RCVD: | |
2369 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2370 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2371 | cm_enter_timewait(cm_id_priv); |
2372 | else | |
2373 | cm_reset_to_idle(cm_id_priv); | |
2374 | break; | |
2375 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2376 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2377 | /* fall through */ |
2378 | case IB_CM_REP_RCVD: | |
2379 | case IB_CM_MRA_REP_SENT: | |
a977049d HR |
2380 | cm_enter_timewait(cm_id_priv); |
2381 | break; | |
8d8ac865 SH |
2382 | case IB_CM_ESTABLISHED: |
2383 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT || | |
2384 | cm_id_priv->id.lap_state == IB_CM_LAP_SENT) { | |
2385 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT) | |
2386 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2387 | cm_id_priv->msg); | |
2388 | cm_enter_timewait(cm_id_priv); | |
2389 | break; | |
2390 | } | |
2391 | /* fall through */ | |
a977049d | 2392 | default: |
24be6e81 | 2393 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2394 | ret = -EINVAL; |
2395 | goto out; | |
2396 | } | |
2397 | ||
2398 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2399 | if (!ret) | |
2400 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2401 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2402 | |
2403 | if (ret) | |
2404 | cm_process_work(cm_id_priv, work); | |
2405 | else | |
2406 | cm_deref_id(cm_id_priv); | |
2407 | return 0; | |
2408 | out: | |
2409 | cm_deref_id(cm_id_priv); | |
2410 | return -EINVAL; | |
2411 | } | |
2412 | ||
2413 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2414 | u8 service_timeout, | |
2415 | const void *private_data, | |
2416 | u8 private_data_len) | |
2417 | { | |
2418 | struct cm_id_private *cm_id_priv; | |
2419 | struct ib_mad_send_buf *msg; | |
de98b693 SH |
2420 | enum ib_cm_state cm_state; |
2421 | enum ib_cm_lap_state lap_state; | |
2422 | enum cm_msg_response msg_response; | |
a977049d HR |
2423 | void *data; |
2424 | unsigned long flags; | |
2425 | int ret; | |
2426 | ||
2427 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2428 | return -EINVAL; | |
2429 | ||
2430 | data = cm_copy_private_data(private_data, private_data_len); | |
2431 | if (IS_ERR(data)) | |
2432 | return PTR_ERR(data); | |
2433 | ||
2434 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2435 | ||
2436 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2437 | switch(cm_id_priv->id.state) { | |
2438 | case IB_CM_REQ_RCVD: | |
de98b693 SH |
2439 | cm_state = IB_CM_MRA_REQ_SENT; |
2440 | lap_state = cm_id->lap_state; | |
2441 | msg_response = CM_MSG_RESPONSE_REQ; | |
a977049d HR |
2442 | break; |
2443 | case IB_CM_REP_RCVD: | |
de98b693 SH |
2444 | cm_state = IB_CM_MRA_REP_SENT; |
2445 | lap_state = cm_id->lap_state; | |
2446 | msg_response = CM_MSG_RESPONSE_REP; | |
a977049d HR |
2447 | break; |
2448 | case IB_CM_ESTABLISHED: | |
50a025c6 SH |
2449 | if (cm_id->lap_state == IB_CM_LAP_RCVD) { |
2450 | cm_state = cm_id->state; | |
2451 | lap_state = IB_CM_MRA_LAP_SENT; | |
2452 | msg_response = CM_MSG_RESPONSE_OTHER; | |
2453 | break; | |
2454 | } | |
de98b693 SH |
2455 | default: |
2456 | ret = -EINVAL; | |
2457 | goto error1; | |
2458 | } | |
2459 | ||
2460 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { | |
a977049d HR |
2461 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2462 | if (ret) | |
2463 | goto error1; | |
2464 | ||
2465 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
de98b693 | 2466 | msg_response, service_timeout, |
a977049d | 2467 | private_data, private_data_len); |
34816ad9 | 2468 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2469 | if (ret) |
2470 | goto error2; | |
a977049d | 2471 | } |
de98b693 SH |
2472 | |
2473 | cm_id->state = cm_state; | |
2474 | cm_id->lap_state = lap_state; | |
a977049d HR |
2475 | cm_id_priv->service_timeout = service_timeout; |
2476 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2477 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2478 | return 0; | |
2479 | ||
2480 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2481 | kfree(data); | |
2482 | return ret; | |
2483 | ||
2484 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2485 | kfree(data); | |
2486 | cm_free_msg(msg); | |
2487 | return ret; | |
2488 | } | |
2489 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2490 | ||
2491 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2492 | { | |
2493 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2494 | case CM_MSG_RESPONSE_REQ: | |
2495 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2496 | case CM_MSG_RESPONSE_REP: | |
2497 | case CM_MSG_RESPONSE_OTHER: | |
2498 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2499 | mra_msg->local_comm_id); | |
2500 | default: | |
2501 | return NULL; | |
2502 | } | |
2503 | } | |
2504 | ||
2505 | static int cm_mra_handler(struct cm_work *work) | |
2506 | { | |
2507 | struct cm_id_private *cm_id_priv; | |
2508 | struct cm_mra_msg *mra_msg; | |
a977049d HR |
2509 | int timeout, ret; |
2510 | ||
2511 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2512 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2513 | if (!cm_id_priv) | |
2514 | return -EINVAL; | |
2515 | ||
2516 | work->cm_event.private_data = &mra_msg->private_data; | |
2517 | work->cm_event.param.mra_rcvd.service_timeout = | |
2518 | cm_mra_get_service_timeout(mra_msg); | |
2519 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
1d846126 | 2520 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 2521 | |
24be6e81 | 2522 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2523 | switch (cm_id_priv->id.state) { |
2524 | case IB_CM_REQ_SENT: | |
2525 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2526 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2527 | cm_id_priv->msg, timeout)) |
a977049d HR |
2528 | goto out; |
2529 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2530 | break; | |
2531 | case IB_CM_REP_SENT: | |
2532 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2533 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2534 | cm_id_priv->msg, timeout)) |
a977049d HR |
2535 | goto out; |
2536 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2537 | break; | |
2538 | case IB_CM_ESTABLISHED: | |
2539 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2540 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2541 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
9af57b7a SH |
2542 | cm_id_priv->msg, timeout)) { |
2543 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2544 | atomic_long_inc(&work->port-> | |
2545 | counter_group[CM_RECV_DUPLICATES]. | |
2546 | counter[CM_MRA_COUNTER]); | |
a977049d | 2547 | goto out; |
9af57b7a | 2548 | } |
a977049d HR |
2549 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
2550 | break; | |
9af57b7a SH |
2551 | case IB_CM_MRA_REQ_RCVD: |
2552 | case IB_CM_MRA_REP_RCVD: | |
2553 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2554 | counter[CM_MRA_COUNTER]); | |
2555 | /* fall through */ | |
a977049d HR |
2556 | default: |
2557 | goto out; | |
2558 | } | |
2559 | ||
2560 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2561 | cm_id_priv->id.state; | |
2562 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2563 | if (!ret) | |
2564 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2565 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2566 | |
2567 | if (ret) | |
2568 | cm_process_work(cm_id_priv, work); | |
2569 | else | |
2570 | cm_deref_id(cm_id_priv); | |
2571 | return 0; | |
2572 | out: | |
24be6e81 | 2573 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2574 | cm_deref_id(cm_id_priv); |
2575 | return -EINVAL; | |
2576 | } | |
2577 | ||
2578 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2579 | struct cm_id_private *cm_id_priv, | |
2580 | struct ib_sa_path_rec *alternate_path, | |
2581 | const void *private_data, | |
2582 | u8 private_data_len) | |
2583 | { | |
2584 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2585 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2586 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2587 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2588 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2589 | /* todo: need remote CM response timeout */ | |
2590 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2591 | lap_msg->alt_local_lid = alternate_path->slid; | |
2592 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2593 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2594 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2595 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2596 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2597 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2598 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2599 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2600 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2601 | cm_lap_set_local_ack_timeout(lap_msg, | |
1d846126 SH |
2602 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
2603 | alternate_path->packet_life_time)); | |
a977049d HR |
2604 | |
2605 | if (private_data && private_data_len) | |
2606 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2607 | } | |
2608 | ||
2609 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2610 | struct ib_sa_path_rec *alternate_path, | |
2611 | const void *private_data, | |
2612 | u8 private_data_len) | |
2613 | { | |
2614 | struct cm_id_private *cm_id_priv; | |
2615 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2616 | unsigned long flags; |
2617 | int ret; | |
2618 | ||
2619 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2620 | return -EINVAL; | |
2621 | ||
2622 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2623 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2624 | if (cm_id->state != IB_CM_ESTABLISHED || | |
e1444b5a SH |
2625 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
2626 | cm_id->lap_state != IB_CM_LAP_IDLE)) { | |
a977049d HR |
2627 | ret = -EINVAL; |
2628 | goto out; | |
2629 | } | |
2630 | ||
e1444b5a SH |
2631 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
2632 | if (ret) | |
2633 | goto out; | |
1d846126 SH |
2634 | cm_id_priv->alt_av.timeout = |
2635 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2636 | cm_id_priv->alt_av.timeout - 1); | |
e1444b5a | 2637 | |
a977049d HR |
2638 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2639 | if (ret) | |
2640 | goto out; | |
2641 | ||
2642 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2643 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2644 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2645 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2646 | ||
34816ad9 | 2647 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2648 | if (ret) { |
2649 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2650 | cm_free_msg(msg); | |
2651 | return ret; | |
2652 | } | |
2653 | ||
2654 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2655 | cm_id_priv->msg = msg; | |
2656 | ||
2657 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2658 | return ret; | |
2659 | } | |
2660 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2661 | ||
e1444b5a SH |
2662 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
2663 | struct ib_sa_path_rec *path, | |
a977049d HR |
2664 | struct cm_lap_msg *lap_msg) |
2665 | { | |
2666 | memset(path, 0, sizeof *path); | |
2667 | path->dgid = lap_msg->alt_local_gid; | |
2668 | path->sgid = lap_msg->alt_remote_gid; | |
2669 | path->dlid = lap_msg->alt_local_lid; | |
2670 | path->slid = lap_msg->alt_remote_lid; | |
2671 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2672 | path->hop_limit = lap_msg->alt_hop_limit; | |
2673 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2674 | path->reversible = 1; | |
e1444b5a | 2675 | path->pkey = cm_id_priv->pkey; |
a977049d HR |
2676 | path->sl = cm_lap_get_sl(lap_msg); |
2677 | path->mtu_selector = IB_SA_EQ; | |
e1444b5a | 2678 | path->mtu = cm_id_priv->path_mtu; |
a977049d HR |
2679 | path->rate_selector = IB_SA_EQ; |
2680 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2681 | path->packet_life_time_selector = IB_SA_EQ; | |
2682 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2683 | path->packet_life_time -= (path->packet_life_time > 0); | |
2684 | } | |
2685 | ||
2686 | static int cm_lap_handler(struct cm_work *work) | |
2687 | { | |
2688 | struct cm_id_private *cm_id_priv; | |
2689 | struct cm_lap_msg *lap_msg; | |
2690 | struct ib_cm_lap_event_param *param; | |
2691 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2692 | int ret; |
2693 | ||
2694 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2695 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2696 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2697 | lap_msg->local_comm_id); | |
2698 | if (!cm_id_priv) | |
2699 | return -EINVAL; | |
2700 | ||
2701 | param = &work->cm_event.param.lap_rcvd; | |
2702 | param->alternate_path = &work->path[0]; | |
e1444b5a | 2703 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
a977049d HR |
2704 | work->cm_event.private_data = &lap_msg->private_data; |
2705 | ||
24be6e81 | 2706 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2707 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
2708 | goto unlock; | |
2709 | ||
2710 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 2711 | case IB_CM_LAP_UNINIT: |
a977049d HR |
2712 | case IB_CM_LAP_IDLE: |
2713 | break; | |
2714 | case IB_CM_MRA_LAP_SENT: | |
9af57b7a SH |
2715 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2716 | counter[CM_LAP_COUNTER]); | |
a977049d HR |
2717 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2718 | goto unlock; | |
2719 | ||
2720 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2721 | CM_MSG_RESPONSE_OTHER, | |
2722 | cm_id_priv->service_timeout, | |
2723 | cm_id_priv->private_data, | |
2724 | cm_id_priv->private_data_len); | |
24be6e81 | 2725 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2726 | |
34816ad9 | 2727 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2728 | cm_free_msg(msg); |
2729 | goto deref; | |
9af57b7a SH |
2730 | case IB_CM_LAP_RCVD: |
2731 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2732 | counter[CM_LAP_COUNTER]); | |
2733 | goto unlock; | |
a977049d HR |
2734 | default: |
2735 | goto unlock; | |
2736 | } | |
2737 | ||
2738 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2739 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e1444b5a SH |
2740 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2741 | work->mad_recv_wc->recv_buf.grh, | |
2742 | &cm_id_priv->av); | |
2743 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); | |
a977049d HR |
2744 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2745 | if (!ret) | |
2746 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2747 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2748 | |
2749 | if (ret) | |
2750 | cm_process_work(cm_id_priv, work); | |
2751 | else | |
2752 | cm_deref_id(cm_id_priv); | |
2753 | return 0; | |
2754 | ||
24be6e81 | 2755 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2756 | deref: cm_deref_id(cm_id_priv); |
2757 | return -EINVAL; | |
2758 | } | |
2759 | ||
2760 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2761 | struct cm_id_private *cm_id_priv, | |
2762 | enum ib_cm_apr_status status, | |
2763 | void *info, | |
2764 | u8 info_length, | |
2765 | const void *private_data, | |
2766 | u8 private_data_len) | |
2767 | { | |
2768 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2769 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2770 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2771 | apr_msg->ap_status = (u8) status; | |
2772 | ||
2773 | if (info && info_length) { | |
2774 | apr_msg->info_length = info_length; | |
2775 | memcpy(apr_msg->info, info, info_length); | |
2776 | } | |
2777 | ||
2778 | if (private_data && private_data_len) | |
2779 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2780 | } | |
2781 | ||
2782 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2783 | enum ib_cm_apr_status status, | |
2784 | void *info, | |
2785 | u8 info_length, | |
2786 | const void *private_data, | |
2787 | u8 private_data_len) | |
2788 | { | |
2789 | struct cm_id_private *cm_id_priv; | |
2790 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2791 | unsigned long flags; |
2792 | int ret; | |
2793 | ||
2794 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2795 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2796 | return -EINVAL; | |
2797 | ||
2798 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2799 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2800 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2801 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2802 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2803 | ret = -EINVAL; | |
2804 | goto out; | |
2805 | } | |
2806 | ||
2807 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2808 | if (ret) | |
2809 | goto out; | |
2810 | ||
2811 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2812 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2813 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2814 | if (ret) { |
2815 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2816 | cm_free_msg(msg); | |
2817 | return ret; | |
2818 | } | |
2819 | ||
2820 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2821 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2822 | return ret; | |
2823 | } | |
2824 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2825 | ||
2826 | static int cm_apr_handler(struct cm_work *work) | |
2827 | { | |
2828 | struct cm_id_private *cm_id_priv; | |
2829 | struct cm_apr_msg *apr_msg; | |
a977049d HR |
2830 | int ret; |
2831 | ||
2832 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2833 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2834 | apr_msg->local_comm_id); | |
2835 | if (!cm_id_priv) | |
2836 | return -EINVAL; /* Unmatched reply. */ | |
2837 | ||
2838 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2839 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2840 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2841 | work->cm_event.private_data = &apr_msg->private_data; | |
2842 | ||
24be6e81 | 2843 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2844 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
2845 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2846 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 2847 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2848 | goto out; |
2849 | } | |
2850 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2851 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2852 | cm_id_priv->msg = NULL; |
2853 | ||
2854 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2855 | if (!ret) | |
2856 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2857 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2858 | |
2859 | if (ret) | |
2860 | cm_process_work(cm_id_priv, work); | |
2861 | else | |
2862 | cm_deref_id(cm_id_priv); | |
2863 | return 0; | |
2864 | out: | |
2865 | cm_deref_id(cm_id_priv); | |
2866 | return -EINVAL; | |
2867 | } | |
2868 | ||
2869 | static int cm_timewait_handler(struct cm_work *work) | |
2870 | { | |
2871 | struct cm_timewait_info *timewait_info; | |
2872 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2873 | int ret; |
2874 | ||
2875 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2876 | spin_lock_irq(&cm.lock); |
2877 | list_del(&timewait_info->list); | |
2878 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2879 | |
2880 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2881 | timewait_info->work.remote_id); | |
2882 | if (!cm_id_priv) | |
2883 | return -EINVAL; | |
2884 | ||
8575329d | 2885 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2886 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2887 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2888 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2889 | goto out; |
2890 | } | |
2891 | cm_id_priv->id.state = IB_CM_IDLE; | |
2892 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2893 | if (!ret) | |
2894 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2895 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2896 | |
2897 | if (ret) | |
2898 | cm_process_work(cm_id_priv, work); | |
2899 | else | |
2900 | cm_deref_id(cm_id_priv); | |
2901 | return 0; | |
2902 | out: | |
2903 | cm_deref_id(cm_id_priv); | |
2904 | return -EINVAL; | |
2905 | } | |
2906 | ||
2907 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2908 | struct cm_id_private *cm_id_priv, | |
2909 | struct ib_cm_sidr_req_param *param) | |
2910 | { | |
2911 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2912 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2913 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
a88f4888 | 2914 | sidr_req_msg->pkey = param->path->pkey; |
a977049d HR |
2915 | sidr_req_msg->service_id = param->service_id; |
2916 | ||
2917 | if (param->private_data && param->private_data_len) | |
2918 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2919 | param->private_data_len); | |
2920 | } | |
2921 | ||
2922 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2923 | struct ib_cm_sidr_req_param *param) | |
2924 | { | |
2925 | struct cm_id_private *cm_id_priv; | |
2926 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2927 | unsigned long flags; |
2928 | int ret; | |
2929 | ||
2930 | if (!param->path || (param->private_data && | |
2931 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2932 | return -EINVAL; | |
2933 | ||
2934 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2935 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2936 | if (ret) | |
2937 | goto out; | |
2938 | ||
2939 | cm_id->service_id = param->service_id; | |
9c3da099 | 2940 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
2941 | cm_id_priv->timeout_ms = param->timeout_ms; |
2942 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2943 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2944 | if (ret) | |
2945 | goto out; | |
2946 | ||
2947 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2948 | param); | |
34816ad9 | 2949 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2950 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2951 | ||
2952 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2953 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2954 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2955 | else |
2956 | ret = -EINVAL; | |
2957 | ||
2958 | if (ret) { | |
2959 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2960 | cm_free_msg(msg); | |
2961 | goto out; | |
2962 | } | |
2963 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2964 | cm_id_priv->msg = msg; | |
2965 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2966 | out: | |
2967 | return ret; | |
2968 | } | |
2969 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2970 | ||
2971 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2972 | struct ib_cm_id *listen_id) | |
2973 | { | |
2974 | struct cm_sidr_req_msg *sidr_req_msg; | |
2975 | struct ib_cm_sidr_req_event_param *param; | |
2976 | ||
2977 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2978 | work->mad_recv_wc->recv_buf.mad; | |
2979 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2980 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2981 | param->listen_id = listen_id; |
a977049d HR |
2982 | param->port = work->port->port_num; |
2983 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
2984 | } | |
2985 | ||
2986 | static int cm_sidr_req_handler(struct cm_work *work) | |
2987 | { | |
2988 | struct ib_cm_id *cm_id; | |
2989 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
2990 | struct cm_sidr_req_msg *sidr_req_msg; | |
2991 | struct ib_wc *wc; | |
a977049d | 2992 | |
d4c4196f | 2993 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
2994 | if (IS_ERR(cm_id)) |
2995 | return PTR_ERR(cm_id); | |
2996 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2997 | ||
2998 | /* Record SGID/SLID and request ID for lookup. */ | |
2999 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
3000 | work->mad_recv_wc->recv_buf.mad; | |
3001 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 3002 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
3003 | cm_id_priv->av.dgid.global.interface_id = 0; |
3004 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 3005 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
3006 | &cm_id_priv->av); |
3007 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
a977049d HR |
3008 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
3009 | atomic_inc(&cm_id_priv->work_count); | |
3010 | ||
24be6e81 | 3011 | spin_lock_irq(&cm.lock); |
a977049d HR |
3012 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
3013 | if (cur_cm_id_priv) { | |
24be6e81 | 3014 | spin_unlock_irq(&cm.lock); |
9af57b7a SH |
3015 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
3016 | counter[CM_SIDR_REQ_COUNTER]); | |
a977049d HR |
3017 | goto out; /* Duplicate message. */ |
3018 | } | |
29c2731c | 3019 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
07d357d0 | 3020 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
3021 | sidr_req_msg->service_id, |
3022 | sidr_req_msg->private_data); | |
a977049d | 3023 | if (!cur_cm_id_priv) { |
24be6e81 | 3024 | spin_unlock_irq(&cm.lock); |
6164c8cd | 3025 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
a977049d HR |
3026 | goto out; /* No match. */ |
3027 | } | |
3028 | atomic_inc(&cur_cm_id_priv->refcount); | |
29963437 | 3029 | atomic_inc(&cm_id_priv->refcount); |
24be6e81 | 3030 | spin_unlock_irq(&cm.lock); |
a977049d HR |
3031 | |
3032 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
3033 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
3034 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
9c3da099 | 3035 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d HR |
3036 | |
3037 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
3038 | cm_process_work(cm_id_priv, work); | |
3039 | cm_deref_id(cur_cm_id_priv); | |
3040 | return 0; | |
3041 | out: | |
3042 | ib_destroy_cm_id(&cm_id_priv->id); | |
3043 | return -EINVAL; | |
3044 | } | |
3045 | ||
3046 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
3047 | struct cm_id_private *cm_id_priv, | |
3048 | struct ib_cm_sidr_rep_param *param) | |
3049 | { | |
3050 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
3051 | cm_id_priv->tid); | |
3052 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
3053 | sidr_rep_msg->status = param->status; | |
3054 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
3055 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
3056 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
3057 | ||
3058 | if (param->info && param->info_length) | |
3059 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
3060 | ||
3061 | if (param->private_data && param->private_data_len) | |
3062 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
3063 | param->private_data_len); | |
3064 | } | |
3065 | ||
3066 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
3067 | struct ib_cm_sidr_rep_param *param) | |
3068 | { | |
3069 | struct cm_id_private *cm_id_priv; | |
3070 | struct ib_mad_send_buf *msg; | |
a977049d HR |
3071 | unsigned long flags; |
3072 | int ret; | |
3073 | ||
3074 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
3075 | (param->private_data && | |
3076 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
3077 | return -EINVAL; | |
3078 | ||
3079 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3080 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3081 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
3082 | ret = -EINVAL; | |
3083 | goto error; | |
3084 | } | |
3085 | ||
3086 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
3087 | if (ret) | |
3088 | goto error; | |
3089 | ||
3090 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
3091 | param); | |
34816ad9 | 3092 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
3093 | if (ret) { |
3094 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3095 | cm_free_msg(msg); | |
3096 | return ret; | |
3097 | } | |
3098 | cm_id->state = IB_CM_IDLE; | |
3099 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3100 | ||
3101 | spin_lock_irqsave(&cm.lock, flags); | |
3102 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
3103 | spin_unlock_irqrestore(&cm.lock, flags); | |
3104 | return 0; | |
3105 | ||
3106 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3107 | return ret; | |
3108 | } | |
3109 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
3110 | ||
3111 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
3112 | { | |
3113 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3114 | struct ib_cm_sidr_rep_event_param *param; | |
3115 | ||
3116 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3117 | work->mad_recv_wc->recv_buf.mad; | |
3118 | param = &work->cm_event.param.sidr_rep_rcvd; | |
3119 | param->status = sidr_rep_msg->status; | |
3120 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
3121 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
3122 | param->info = &sidr_rep_msg->info; | |
3123 | param->info_len = sidr_rep_msg->info_length; | |
3124 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
3125 | } | |
3126 | ||
3127 | static int cm_sidr_rep_handler(struct cm_work *work) | |
3128 | { | |
3129 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3130 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
3131 | |
3132 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3133 | work->mad_recv_wc->recv_buf.mad; | |
3134 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
3135 | if (!cm_id_priv) | |
3136 | return -EINVAL; /* Unmatched reply. */ | |
3137 | ||
24be6e81 | 3138 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 3139 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 3140 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3141 | goto out; |
3142 | } | |
3143 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 3144 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 3145 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3146 | |
3147 | cm_format_sidr_rep_event(work); | |
3148 | cm_process_work(cm_id_priv, work); | |
3149 | return 0; | |
3150 | out: | |
3151 | cm_deref_id(cm_id_priv); | |
3152 | return -EINVAL; | |
3153 | } | |
3154 | ||
3155 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
3156 | enum ib_wc_status wc_status) | |
3157 | { | |
3158 | struct cm_id_private *cm_id_priv; | |
3159 | struct ib_cm_event cm_event; | |
3160 | enum ib_cm_state state; | |
a977049d HR |
3161 | int ret; |
3162 | ||
3163 | memset(&cm_event, 0, sizeof cm_event); | |
3164 | cm_id_priv = msg->context[0]; | |
3165 | ||
3166 | /* Discard old sends or ones without a response. */ | |
24be6e81 | 3167 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3168 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
3169 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
3170 | goto discard; | |
3171 | ||
3172 | switch (state) { | |
3173 | case IB_CM_REQ_SENT: | |
3174 | case IB_CM_MRA_REQ_RCVD: | |
3175 | cm_reset_to_idle(cm_id_priv); | |
3176 | cm_event.event = IB_CM_REQ_ERROR; | |
3177 | break; | |
3178 | case IB_CM_REP_SENT: | |
3179 | case IB_CM_MRA_REP_RCVD: | |
3180 | cm_reset_to_idle(cm_id_priv); | |
3181 | cm_event.event = IB_CM_REP_ERROR; | |
3182 | break; | |
3183 | case IB_CM_DREQ_SENT: | |
3184 | cm_enter_timewait(cm_id_priv); | |
3185 | cm_event.event = IB_CM_DREQ_ERROR; | |
3186 | break; | |
3187 | case IB_CM_SIDR_REQ_SENT: | |
3188 | cm_id_priv->id.state = IB_CM_IDLE; | |
3189 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
3190 | break; | |
3191 | default: | |
3192 | goto discard; | |
3193 | } | |
24be6e81 | 3194 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3195 | cm_event.param.send_status = wc_status; |
3196 | ||
3197 | /* No other events can occur on the cm_id at this point. */ | |
3198 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
3199 | cm_free_msg(msg); | |
3200 | if (ret) | |
3201 | ib_destroy_cm_id(&cm_id_priv->id); | |
3202 | return; | |
3203 | discard: | |
24be6e81 | 3204 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3205 | cm_free_msg(msg); |
3206 | } | |
3207 | ||
3208 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
3209 | struct ib_mad_send_wc *mad_send_wc) | |
3210 | { | |
34816ad9 | 3211 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
9af57b7a SH |
3212 | struct cm_port *port; |
3213 | u16 attr_index; | |
3214 | ||
3215 | port = mad_agent->context; | |
3216 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) | |
3217 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; | |
3218 | ||
3219 | /* | |
3220 | * If the send was in response to a received message (context[0] is not | |
3221 | * set to a cm_id), and is not a REJ, then it is a send that was | |
3222 | * manually retried. | |
3223 | */ | |
3224 | if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) | |
3225 | msg->retries = 1; | |
3226 | ||
3227 | atomic_long_add(1 + msg->retries, | |
3228 | &port->counter_group[CM_XMIT].counter[attr_index]); | |
3229 | if (msg->retries) | |
3230 | atomic_long_add(msg->retries, | |
3231 | &port->counter_group[CM_XMIT_RETRIES]. | |
3232 | counter[attr_index]); | |
a977049d HR |
3233 | |
3234 | switch (mad_send_wc->status) { | |
3235 | case IB_WC_SUCCESS: | |
3236 | case IB_WC_WR_FLUSH_ERR: | |
3237 | cm_free_msg(msg); | |
3238 | break; | |
3239 | default: | |
3240 | if (msg->context[0] && msg->context[1]) | |
3241 | cm_process_send_error(msg, mad_send_wc->status); | |
3242 | else | |
3243 | cm_free_msg(msg); | |
3244 | break; | |
3245 | } | |
3246 | } | |
3247 | ||
c4028958 | 3248 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3249 | { |
c4028958 | 3250 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3251 | int ret; |
3252 | ||
3253 | switch (work->cm_event.event) { | |
3254 | case IB_CM_REQ_RECEIVED: | |
3255 | ret = cm_req_handler(work); | |
3256 | break; | |
3257 | case IB_CM_MRA_RECEIVED: | |
3258 | ret = cm_mra_handler(work); | |
3259 | break; | |
3260 | case IB_CM_REJ_RECEIVED: | |
3261 | ret = cm_rej_handler(work); | |
3262 | break; | |
3263 | case IB_CM_REP_RECEIVED: | |
3264 | ret = cm_rep_handler(work); | |
3265 | break; | |
3266 | case IB_CM_RTU_RECEIVED: | |
3267 | ret = cm_rtu_handler(work); | |
3268 | break; | |
3269 | case IB_CM_USER_ESTABLISHED: | |
3270 | ret = cm_establish_handler(work); | |
3271 | break; | |
3272 | case IB_CM_DREQ_RECEIVED: | |
3273 | ret = cm_dreq_handler(work); | |
3274 | break; | |
3275 | case IB_CM_DREP_RECEIVED: | |
3276 | ret = cm_drep_handler(work); | |
3277 | break; | |
3278 | case IB_CM_SIDR_REQ_RECEIVED: | |
3279 | ret = cm_sidr_req_handler(work); | |
3280 | break; | |
3281 | case IB_CM_SIDR_REP_RECEIVED: | |
3282 | ret = cm_sidr_rep_handler(work); | |
3283 | break; | |
3284 | case IB_CM_LAP_RECEIVED: | |
3285 | ret = cm_lap_handler(work); | |
3286 | break; | |
3287 | case IB_CM_APR_RECEIVED: | |
3288 | ret = cm_apr_handler(work); | |
3289 | break; | |
3290 | case IB_CM_TIMEWAIT_EXIT: | |
3291 | ret = cm_timewait_handler(work); | |
3292 | break; | |
3293 | default: | |
3294 | ret = -EINVAL; | |
3295 | break; | |
3296 | } | |
3297 | if (ret) | |
3298 | cm_free_work(work); | |
3299 | } | |
3300 | ||
e1444b5a | 3301 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3302 | { |
3303 | struct cm_id_private *cm_id_priv; | |
3304 | struct cm_work *work; | |
3305 | unsigned long flags; | |
3306 | int ret = 0; | |
3307 | ||
3308 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3309 | if (!work) | |
3310 | return -ENOMEM; | |
3311 | ||
3312 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3313 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3314 | switch (cm_id->state) | |
3315 | { | |
3316 | case IB_CM_REP_SENT: | |
3317 | case IB_CM_MRA_REP_RCVD: | |
3318 | cm_id->state = IB_CM_ESTABLISHED; | |
3319 | break; | |
3320 | case IB_CM_ESTABLISHED: | |
3321 | ret = -EISCONN; | |
3322 | break; | |
3323 | default: | |
3324 | ret = -EINVAL; | |
3325 | break; | |
3326 | } | |
3327 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3328 | ||
3329 | if (ret) { | |
3330 | kfree(work); | |
3331 | goto out; | |
3332 | } | |
3333 | ||
3334 | /* | |
3335 | * The CM worker thread may try to destroy the cm_id before it | |
3336 | * can execute this work item. To prevent potential deadlock, | |
3337 | * we need to find the cm_id once we're in the context of the | |
3338 | * worker thread, rather than holding a reference on it. | |
3339 | */ | |
c4028958 | 3340 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3341 | work->local_id = cm_id->local_id; |
3342 | work->remote_id = cm_id->remote_id; | |
3343 | work->mad_recv_wc = NULL; | |
3344 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
c4028958 | 3345 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3346 | out: |
3347 | return ret; | |
3348 | } | |
e1444b5a SH |
3349 | |
3350 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3351 | { | |
3352 | struct cm_id_private *cm_id_priv; | |
3353 | unsigned long flags; | |
3354 | int ret = 0; | |
3355 | ||
3356 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3357 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3358 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3359 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3360 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3361 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3362 | cm_id_priv->av = cm_id_priv->alt_av; | |
3363 | } else | |
3364 | ret = -EINVAL; | |
3365 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3366 | ||
3367 | return ret; | |
3368 | } | |
3369 | ||
3370 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3371 | { | |
3372 | int ret; | |
3373 | ||
3374 | switch (event) { | |
3375 | case IB_EVENT_COMM_EST: | |
3376 | ret = cm_establish(cm_id); | |
3377 | break; | |
3378 | case IB_EVENT_PATH_MIG: | |
3379 | ret = cm_migrate(cm_id); | |
3380 | break; | |
3381 | default: | |
3382 | ret = -EINVAL; | |
3383 | } | |
3384 | return ret; | |
3385 | } | |
3386 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3387 | |
3388 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3389 | struct ib_mad_recv_wc *mad_recv_wc) | |
3390 | { | |
9af57b7a | 3391 | struct cm_port *port = mad_agent->context; |
a977049d HR |
3392 | struct cm_work *work; |
3393 | enum ib_cm_event_type event; | |
9af57b7a | 3394 | u16 attr_id; |
a977049d HR |
3395 | int paths = 0; |
3396 | ||
3397 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3398 | case CM_REQ_ATTR_ID: | |
3399 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3400 | alt_local_lid != 0); | |
3401 | event = IB_CM_REQ_RECEIVED; | |
3402 | break; | |
3403 | case CM_MRA_ATTR_ID: | |
3404 | event = IB_CM_MRA_RECEIVED; | |
3405 | break; | |
3406 | case CM_REJ_ATTR_ID: | |
3407 | event = IB_CM_REJ_RECEIVED; | |
3408 | break; | |
3409 | case CM_REP_ATTR_ID: | |
3410 | event = IB_CM_REP_RECEIVED; | |
3411 | break; | |
3412 | case CM_RTU_ATTR_ID: | |
3413 | event = IB_CM_RTU_RECEIVED; | |
3414 | break; | |
3415 | case CM_DREQ_ATTR_ID: | |
3416 | event = IB_CM_DREQ_RECEIVED; | |
3417 | break; | |
3418 | case CM_DREP_ATTR_ID: | |
3419 | event = IB_CM_DREP_RECEIVED; | |
3420 | break; | |
3421 | case CM_SIDR_REQ_ATTR_ID: | |
3422 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3423 | break; | |
3424 | case CM_SIDR_REP_ATTR_ID: | |
3425 | event = IB_CM_SIDR_REP_RECEIVED; | |
3426 | break; | |
3427 | case CM_LAP_ATTR_ID: | |
3428 | paths = 1; | |
3429 | event = IB_CM_LAP_RECEIVED; | |
3430 | break; | |
3431 | case CM_APR_ATTR_ID: | |
3432 | event = IB_CM_APR_RECEIVED; | |
3433 | break; | |
3434 | default: | |
3435 | ib_free_recv_mad(mad_recv_wc); | |
3436 | return; | |
3437 | } | |
3438 | ||
9af57b7a SH |
3439 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
3440 | atomic_long_inc(&port->counter_group[CM_RECV]. | |
3441 | counter[attr_id - CM_ATTR_ID_OFFSET]); | |
3442 | ||
a977049d HR |
3443 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
3444 | GFP_KERNEL); | |
3445 | if (!work) { | |
3446 | ib_free_recv_mad(mad_recv_wc); | |
3447 | return; | |
3448 | } | |
3449 | ||
c4028958 | 3450 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3451 | work->cm_event.event = event; |
3452 | work->mad_recv_wc = mad_recv_wc; | |
9af57b7a | 3453 | work->port = port; |
c4028958 | 3454 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3455 | } |
3456 | ||
3457 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3458 | struct ib_qp_attr *qp_attr, | |
3459 | int *qp_attr_mask) | |
3460 | { | |
3461 | unsigned long flags; | |
3462 | int ret; | |
3463 | ||
3464 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3465 | switch (cm_id_priv->id.state) { | |
3466 | case IB_CM_REQ_SENT: | |
3467 | case IB_CM_MRA_REQ_RCVD: | |
3468 | case IB_CM_REQ_RCVD: | |
3469 | case IB_CM_MRA_REQ_SENT: | |
3470 | case IB_CM_REP_RCVD: | |
3471 | case IB_CM_MRA_REP_SENT: | |
3472 | case IB_CM_REP_SENT: | |
3473 | case IB_CM_MRA_REP_RCVD: | |
3474 | case IB_CM_ESTABLISHED: | |
3475 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3476 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 3477 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 3478 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3479 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3480 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3481 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3482 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3483 | ret = 0; | |
3484 | break; | |
3485 | default: | |
3486 | ret = -EINVAL; | |
3487 | break; | |
3488 | } | |
3489 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3490 | return ret; | |
3491 | } | |
3492 | ||
3493 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3494 | struct ib_qp_attr *qp_attr, | |
3495 | int *qp_attr_mask) | |
3496 | { | |
3497 | unsigned long flags; | |
3498 | int ret; | |
3499 | ||
3500 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3501 | switch (cm_id_priv->id.state) { | |
3502 | case IB_CM_REQ_RCVD: | |
3503 | case IB_CM_MRA_REQ_SENT: | |
3504 | case IB_CM_REP_RCVD: | |
3505 | case IB_CM_MRA_REP_SENT: | |
3506 | case IB_CM_REP_SENT: | |
3507 | case IB_CM_MRA_REP_RCVD: | |
3508 | case IB_CM_ESTABLISHED: | |
3509 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3510 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d | 3511 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
990acea6 WY |
3512 | if (!cm_id_priv->av.valid) { |
3513 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
dd5f03be | 3514 | return -EINVAL; |
990acea6 | 3515 | } |
dd5f03be MB |
3516 | if (cm_id_priv->av.ah_attr.vlan_id != 0xffff) { |
3517 | qp_attr->vlan_id = cm_id_priv->av.ah_attr.vlan_id; | |
3518 | *qp_attr_mask |= IB_QP_VID; | |
3519 | } | |
3520 | if (!is_zero_ether_addr(cm_id_priv->av.smac)) { | |
3521 | memcpy(qp_attr->smac, cm_id_priv->av.smac, | |
3522 | sizeof(qp_attr->smac)); | |
3523 | *qp_attr_mask |= IB_QP_SMAC; | |
3524 | } | |
3525 | if (cm_id_priv->alt_av.valid) { | |
3526 | if (cm_id_priv->alt_av.ah_attr.vlan_id != 0xffff) { | |
3527 | qp_attr->alt_vlan_id = | |
3528 | cm_id_priv->alt_av.ah_attr.vlan_id; | |
3529 | *qp_attr_mask |= IB_QP_ALT_VID; | |
3530 | } | |
3531 | if (!is_zero_ether_addr(cm_id_priv->alt_av.smac)) { | |
3532 | memcpy(qp_attr->alt_smac, | |
3533 | cm_id_priv->alt_av.smac, | |
3534 | sizeof(qp_attr->alt_smac)); | |
3535 | *qp_attr_mask |= IB_QP_ALT_SMAC; | |
3536 | } | |
3537 | } | |
a977049d HR |
3538 | qp_attr->path_mtu = cm_id_priv->path_mtu; |
3539 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3540 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
d26a360b SH |
3541 | if (cm_id_priv->qp_type == IB_QPT_RC || |
3542 | cm_id_priv->qp_type == IB_QPT_XRC_TGT) { | |
ae7971a7 SH |
3543 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
3544 | IB_QP_MIN_RNR_TIMER; | |
3545 | qp_attr->max_dest_rd_atomic = | |
3546 | cm_id_priv->responder_resources; | |
3547 | qp_attr->min_rnr_timer = 0; | |
3548 | } | |
a977049d HR |
3549 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3550 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3551 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 3552 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 3553 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
3554 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3555 | } | |
3556 | ret = 0; | |
3557 | break; | |
3558 | default: | |
3559 | ret = -EINVAL; | |
3560 | break; | |
3561 | } | |
3562 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3563 | return ret; | |
3564 | } | |
3565 | ||
3566 | static int cm_init_qp_rts_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) { | |
0fe313b0 SH |
3575 | /* Allow transition to RTS before sending REP */ |
3576 | case IB_CM_REQ_RCVD: | |
3577 | case IB_CM_MRA_REQ_SENT: | |
3578 | ||
a977049d HR |
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: | |
e1444b5a SH |
3584 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
3585 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
3586 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
d26a360b SH |
3587 | switch (cm_id_priv->qp_type) { |
3588 | case IB_QPT_RC: | |
3589 | case IB_QPT_XRC_INI: | |
3590 | *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY | | |
e1444b5a | 3591 | IB_QP_MAX_QP_RD_ATOMIC; |
e1444b5a SH |
3592 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
3593 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
d26a360b SH |
3594 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; |
3595 | /* fall through */ | |
3596 | case IB_QPT_XRC_TGT: | |
3597 | *qp_attr_mask |= IB_QP_TIMEOUT; | |
3598 | qp_attr->timeout = cm_id_priv->av.timeout; | |
3599 | break; | |
3600 | default: | |
3601 | break; | |
e1444b5a SH |
3602 | } |
3603 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3604 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3605 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3606 | } | |
3607 | } else { | |
3608 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
3609 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; | |
3610 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; | |
1d846126 | 3611 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 3612 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
3613 | qp_attr->path_mig_state = IB_MIG_REARM; |
3614 | } | |
3615 | ret = 0; | |
3616 | break; | |
3617 | default: | |
3618 | ret = -EINVAL; | |
3619 | break; | |
3620 | } | |
3621 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3622 | return ret; | |
3623 | } | |
3624 | ||
3625 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3626 | struct ib_qp_attr *qp_attr, | |
3627 | int *qp_attr_mask) | |
3628 | { | |
3629 | struct cm_id_private *cm_id_priv; | |
3630 | int ret; | |
3631 | ||
3632 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3633 | switch (qp_attr->qp_state) { | |
3634 | case IB_QPS_INIT: | |
3635 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3636 | break; | |
3637 | case IB_QPS_RTR: | |
3638 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3639 | break; | |
3640 | case IB_QPS_RTS: | |
3641 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3642 | break; | |
3643 | default: | |
3644 | ret = -EINVAL; | |
3645 | break; | |
3646 | } | |
3647 | return ret; | |
3648 | } | |
3649 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3650 | ||
454a01e7 | 3651 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
1d846126 SH |
3652 | { |
3653 | struct ib_device_attr attr; | |
3654 | ||
d4c4196f | 3655 | if (ib_query_device(cm_dev->ib_device, &attr)) |
1d846126 SH |
3656 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ |
3657 | else | |
3658 | cm_dev->ack_delay = attr.local_ca_ack_delay; | |
3659 | } | |
3660 | ||
9af57b7a SH |
3661 | static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, |
3662 | char *buf) | |
3663 | { | |
3664 | struct cm_counter_group *group; | |
3665 | struct cm_counter_attribute *cm_attr; | |
3666 | ||
3667 | group = container_of(obj, struct cm_counter_group, obj); | |
3668 | cm_attr = container_of(attr, struct cm_counter_attribute, attr); | |
3669 | ||
3670 | return sprintf(buf, "%ld\n", | |
3671 | atomic_long_read(&group->counter[cm_attr->index])); | |
3672 | } | |
3673 | ||
52cf25d0 | 3674 | static const struct sysfs_ops cm_counter_ops = { |
9af57b7a SH |
3675 | .show = cm_show_counter |
3676 | }; | |
3677 | ||
3678 | static struct kobj_type cm_counter_obj_type = { | |
3679 | .sysfs_ops = &cm_counter_ops, | |
3680 | .default_attrs = cm_counter_default_attrs | |
3681 | }; | |
3682 | ||
3683 | static void cm_release_port_obj(struct kobject *obj) | |
3684 | { | |
3685 | struct cm_port *cm_port; | |
3686 | ||
9af57b7a SH |
3687 | cm_port = container_of(obj, struct cm_port, port_obj); |
3688 | kfree(cm_port); | |
3689 | } | |
3690 | ||
3691 | static struct kobj_type cm_port_obj_type = { | |
3692 | .release = cm_release_port_obj | |
3693 | }; | |
3694 | ||
2c9ede55 | 3695 | static char *cm_devnode(struct device *dev, umode_t *mode) |
c3af0980 | 3696 | { |
b2bc4782 GR |
3697 | if (mode) |
3698 | *mode = 0666; | |
c3af0980 RD |
3699 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
3700 | } | |
3701 | ||
9af57b7a | 3702 | struct class cm_class = { |
c3af0980 | 3703 | .owner = THIS_MODULE, |
9af57b7a | 3704 | .name = "infiniband_cm", |
c3af0980 | 3705 | .devnode = cm_devnode, |
9af57b7a SH |
3706 | }; |
3707 | EXPORT_SYMBOL(cm_class); | |
3708 | ||
9af57b7a SH |
3709 | static int cm_create_port_fs(struct cm_port *port) |
3710 | { | |
3711 | int i, ret; | |
3712 | ||
3713 | ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, | |
110cf374 | 3714 | &port->cm_dev->device->kobj, |
9af57b7a SH |
3715 | "%d", port->port_num); |
3716 | if (ret) { | |
3717 | kfree(port); | |
3718 | return ret; | |
3719 | } | |
3720 | ||
3721 | for (i = 0; i < CM_COUNTER_GROUPS; i++) { | |
3722 | ret = kobject_init_and_add(&port->counter_group[i].obj, | |
3723 | &cm_counter_obj_type, | |
7c7a9bcc | 3724 | &port->port_obj, |
9af57b7a SH |
3725 | "%s", counter_group_names[i]); |
3726 | if (ret) | |
3727 | goto error; | |
3728 | } | |
3729 | ||
3730 | return 0; | |
3731 | ||
3732 | error: | |
3733 | while (i--) | |
7c7a9bcc RD |
3734 | kobject_put(&port->counter_group[i].obj); |
3735 | kobject_put(&port->port_obj); | |
9af57b7a SH |
3736 | return ret; |
3737 | ||
3738 | } | |
3739 | ||
3740 | static void cm_remove_port_fs(struct cm_port *port) | |
3741 | { | |
3742 | int i; | |
3743 | ||
3744 | for (i = 0; i < CM_COUNTER_GROUPS; i++) | |
7c7a9bcc | 3745 | kobject_put(&port->counter_group[i].obj); |
9af57b7a | 3746 | |
7c7a9bcc | 3747 | kobject_put(&port->port_obj); |
9af57b7a SH |
3748 | } |
3749 | ||
d4c4196f | 3750 | static void cm_add_one(struct ib_device *ib_device) |
a977049d HR |
3751 | { |
3752 | struct cm_device *cm_dev; | |
3753 | struct cm_port *port; | |
3754 | struct ib_mad_reg_req reg_req = { | |
3755 | .mgmt_class = IB_MGMT_CLASS_CM, | |
0f29b46d | 3756 | .mgmt_class_version = IB_CM_CLASS_VERSION, |
a977049d HR |
3757 | }; |
3758 | struct ib_port_modify port_modify = { | |
3759 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3760 | }; | |
3761 | unsigned long flags; | |
3762 | int ret; | |
3763 | u8 i; | |
3764 | ||
d4c4196f | 3765 | if (rdma_node_get_transport(ib_device->node_type) != RDMA_TRANSPORT_IB) |
07ebafba TT |
3766 | return; |
3767 | ||
9af57b7a | 3768 | cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * |
d4c4196f | 3769 | ib_device->phys_port_cnt, GFP_KERNEL); |
a977049d HR |
3770 | if (!cm_dev) |
3771 | return; | |
3772 | ||
d4c4196f | 3773 | cm_dev->ib_device = ib_device; |
1d846126 | 3774 | cm_get_ack_delay(cm_dev); |
a977049d | 3775 | |
91bd418f GKH |
3776 | cm_dev->device = device_create(&cm_class, &ib_device->dev, |
3777 | MKDEV(0, 0), NULL, | |
3778 | "%s", ib_device->name); | |
3e340c05 | 3779 | if (IS_ERR(cm_dev->device)) { |
9af57b7a SH |
3780 | kfree(cm_dev); |
3781 | return; | |
3782 | } | |
3783 | ||
a977049d | 3784 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
d4c4196f | 3785 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
9af57b7a SH |
3786 | port = kzalloc(sizeof *port, GFP_KERNEL); |
3787 | if (!port) | |
3788 | goto error1; | |
3789 | ||
3790 | cm_dev->port[i-1] = port; | |
a977049d HR |
3791 | port->cm_dev = cm_dev; |
3792 | port->port_num = i; | |
9af57b7a SH |
3793 | |
3794 | ret = cm_create_port_fs(port); | |
3795 | if (ret) | |
3796 | goto error1; | |
3797 | ||
d4c4196f | 3798 | port->mad_agent = ib_register_mad_agent(ib_device, i, |
a977049d HR |
3799 | IB_QPT_GSI, |
3800 | ®_req, | |
3801 | 0, | |
3802 | cm_send_handler, | |
3803 | cm_recv_handler, | |
0f29b46d IW |
3804 | port, |
3805 | 0); | |
a977049d | 3806 | if (IS_ERR(port->mad_agent)) |
9af57b7a | 3807 | goto error2; |
a977049d | 3808 | |
d4c4196f | 3809 | ret = ib_modify_port(ib_device, i, 0, &port_modify); |
a977049d | 3810 | if (ret) |
9af57b7a | 3811 | goto error3; |
a977049d | 3812 | } |
d4c4196f | 3813 | ib_set_client_data(ib_device, &cm_client, cm_dev); |
a977049d HR |
3814 | |
3815 | write_lock_irqsave(&cm.device_lock, flags); | |
3816 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3817 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3818 | return; | |
3819 | ||
9af57b7a | 3820 | error3: |
cf311cd4 | 3821 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a SH |
3822 | error2: |
3823 | cm_remove_port_fs(port); | |
cf311cd4 | 3824 | error1: |
a977049d HR |
3825 | port_modify.set_port_cap_mask = 0; |
3826 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3827 | while (--i) { | |
9af57b7a | 3828 | port = cm_dev->port[i-1]; |
d4c4196f | 3829 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3830 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a | 3831 | cm_remove_port_fs(port); |
a977049d | 3832 | } |
110cf374 | 3833 | device_unregister(cm_dev->device); |
a7e80ce2 | 3834 | kfree(cm_dev); |
a977049d HR |
3835 | } |
3836 | ||
d4c4196f | 3837 | static void cm_remove_one(struct ib_device *ib_device) |
a977049d HR |
3838 | { |
3839 | struct cm_device *cm_dev; | |
3840 | struct cm_port *port; | |
3841 | struct ib_port_modify port_modify = { | |
3842 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3843 | }; | |
3844 | unsigned long flags; | |
3845 | int i; | |
3846 | ||
d4c4196f | 3847 | cm_dev = ib_get_client_data(ib_device, &cm_client); |
a977049d HR |
3848 | if (!cm_dev) |
3849 | return; | |
3850 | ||
3851 | write_lock_irqsave(&cm.device_lock, flags); | |
3852 | list_del(&cm_dev->list); | |
3853 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3854 | ||
d4c4196f | 3855 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
9af57b7a | 3856 | port = cm_dev->port[i-1]; |
d4c4196f | 3857 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3858 | ib_unregister_mad_agent(port->mad_agent); |
84ba284c | 3859 | flush_workqueue(cm.wq); |
9af57b7a | 3860 | cm_remove_port_fs(port); |
a977049d | 3861 | } |
110cf374 | 3862 | device_unregister(cm_dev->device); |
a7e80ce2 | 3863 | kfree(cm_dev); |
a977049d HR |
3864 | } |
3865 | ||
3866 | static int __init ib_cm_init(void) | |
3867 | { | |
3868 | int ret; | |
3869 | ||
3870 | memset(&cm, 0, sizeof cm); | |
3871 | INIT_LIST_HEAD(&cm.device_list); | |
3872 | rwlock_init(&cm.device_lock); | |
3873 | spin_lock_init(&cm.lock); | |
3874 | cm.listen_service_table = RB_ROOT; | |
9c3da099 | 3875 | cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
a977049d HR |
3876 | cm.remote_id_table = RB_ROOT; |
3877 | cm.remote_qp_table = RB_ROOT; | |
3878 | cm.remote_sidr_table = RB_ROOT; | |
3879 | idr_init(&cm.local_id_table); | |
f06d2653 | 3880 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
8575329d | 3881 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d | 3882 | |
9af57b7a | 3883 | ret = class_register(&cm_class); |
87d4abda DB |
3884 | if (ret) { |
3885 | ret = -ENOMEM; | |
3886 | goto error1; | |
3887 | } | |
a977049d | 3888 | |
9af57b7a SH |
3889 | cm.wq = create_workqueue("ib_cm"); |
3890 | if (!cm.wq) { | |
3891 | ret = -ENOMEM; | |
87d4abda | 3892 | goto error2; |
9af57b7a SH |
3893 | } |
3894 | ||
a977049d HR |
3895 | ret = ib_register_client(&cm_client); |
3896 | if (ret) | |
87d4abda | 3897 | goto error3; |
a977049d HR |
3898 | |
3899 | return 0; | |
87d4abda | 3900 | error3: |
a977049d | 3901 | destroy_workqueue(cm.wq); |
87d4abda | 3902 | error2: |
9af57b7a | 3903 | class_unregister(&cm_class); |
87d4abda DB |
3904 | error1: |
3905 | idr_destroy(&cm.local_id_table); | |
a977049d HR |
3906 | return ret; |
3907 | } | |
3908 | ||
3909 | static void __exit ib_cm_cleanup(void) | |
3910 | { | |
8575329d SH |
3911 | struct cm_timewait_info *timewait_info, *tmp; |
3912 | ||
3913 | spin_lock_irq(&cm.lock); | |
3914 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3915 | cancel_delayed_work(&timewait_info->work.work); | |
3916 | spin_unlock_irq(&cm.lock); | |
3917 | ||
84ba284c | 3918 | ib_unregister_client(&cm_client); |
a977049d | 3919 | destroy_workqueue(cm.wq); |
8575329d SH |
3920 | |
3921 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3922 | list_del(&timewait_info->list); | |
3923 | kfree(timewait_info); | |
3924 | } | |
3925 | ||
9af57b7a | 3926 | class_unregister(&cm_class); |
5d7edb3c | 3927 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3928 | } |
3929 | ||
3930 | module_init(ib_cm_init); | |
3931 | module_exit(ib_cm_cleanup); | |
3932 |