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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 | ||
dd5f03be MB |
352 | int ib_update_cm_av(struct ib_cm_id *id, const u8 *smac, const u8 *alt_smac) |
353 | { | |
354 | struct cm_id_private *cm_id_priv; | |
355 | ||
356 | cm_id_priv = container_of(id, struct cm_id_private, id); | |
357 | ||
358 | if (smac != NULL) | |
359 | memcpy(cm_id_priv->av.smac, smac, sizeof(cm_id_priv->av.smac)); | |
360 | ||
361 | if (alt_smac != NULL) | |
362 | memcpy(cm_id_priv->alt_av.smac, alt_smac, | |
363 | sizeof(cm_id_priv->alt_av.smac)); | |
364 | ||
365 | return 0; | |
366 | } | |
367 | EXPORT_SYMBOL(ib_update_cm_av); | |
368 | ||
a977049d HR |
369 | static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) |
370 | { | |
371 | struct cm_device *cm_dev; | |
372 | struct cm_port *port = NULL; | |
373 | unsigned long flags; | |
374 | int ret; | |
375 | u8 p; | |
376 | ||
377 | read_lock_irqsave(&cm.device_lock, flags); | |
378 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
d4c4196f | 379 | if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid, |
a977049d | 380 | &p, NULL)) { |
9af57b7a | 381 | port = cm_dev->port[p-1]; |
a977049d HR |
382 | break; |
383 | } | |
384 | } | |
385 | read_unlock_irqrestore(&cm.device_lock, flags); | |
386 | ||
387 | if (!port) | |
388 | return -EINVAL; | |
389 | ||
d4c4196f | 390 | ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num, |
a977049d HR |
391 | be16_to_cpu(path->pkey), &av->pkey_index); |
392 | if (ret) | |
393 | return ret; | |
394 | ||
395 | av->port = port; | |
d4c4196f | 396 | ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path, |
ca222c6b | 397 | &av->ah_attr); |
1d846126 | 398 | av->timeout = path->packet_life_time + 1; |
dd5f03be MB |
399 | memcpy(av->smac, path->smac, sizeof(av->smac)); |
400 | ||
401 | av->valid = 1; | |
a977049d HR |
402 | return 0; |
403 | } | |
404 | ||
405 | static int cm_alloc_id(struct cm_id_private *cm_id_priv) | |
406 | { | |
407 | unsigned long flags; | |
3b069c5d | 408 | int id; |
a977049d | 409 | |
3b069c5d TH |
410 | idr_preload(GFP_KERNEL); |
411 | spin_lock_irqsave(&cm.lock, flags); | |
412 | ||
ab626d1a | 413 | id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT); |
3b069c5d TH |
414 | |
415 | spin_unlock_irqrestore(&cm.lock, flags); | |
416 | idr_preload_end(); | |
f06d2653 | 417 | |
1b90c137 | 418 | cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; |
3b069c5d | 419 | return id < 0 ? id : 0; |
a977049d HR |
420 | } |
421 | ||
97f52eb4 | 422 | static void cm_free_id(__be32 local_id) |
a977049d | 423 | { |
24be6e81 | 424 | spin_lock_irq(&cm.lock); |
f06d2653 SH |
425 | idr_remove(&cm.local_id_table, |
426 | (__force int) (local_id ^ cm.random_id_operand)); | |
24be6e81 | 427 | spin_unlock_irq(&cm.lock); |
a977049d HR |
428 | } |
429 | ||
97f52eb4 | 430 | static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
431 | { |
432 | struct cm_id_private *cm_id_priv; | |
433 | ||
f06d2653 SH |
434 | cm_id_priv = idr_find(&cm.local_id_table, |
435 | (__force int) (local_id ^ cm.random_id_operand)); | |
a977049d HR |
436 | if (cm_id_priv) { |
437 | if (cm_id_priv->id.remote_id == remote_id) | |
438 | atomic_inc(&cm_id_priv->refcount); | |
439 | else | |
440 | cm_id_priv = NULL; | |
441 | } | |
442 | ||
443 | return cm_id_priv; | |
444 | } | |
445 | ||
97f52eb4 | 446 | static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
447 | { |
448 | struct cm_id_private *cm_id_priv; | |
a977049d | 449 | |
24be6e81 | 450 | spin_lock_irq(&cm.lock); |
a977049d | 451 | cm_id_priv = cm_get_id(local_id, remote_id); |
24be6e81 | 452 | spin_unlock_irq(&cm.lock); |
a977049d HR |
453 | |
454 | return cm_id_priv; | |
455 | } | |
456 | ||
6e61d04f SH |
457 | static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
458 | { | |
459 | int i; | |
460 | ||
461 | for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) | |
462 | ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & | |
463 | ((unsigned long *) mask)[i]; | |
464 | } | |
465 | ||
466 | static int cm_compare_data(struct ib_cm_compare_data *src_data, | |
467 | struct ib_cm_compare_data *dst_data) | |
468 | { | |
469 | u8 src[IB_CM_COMPARE_SIZE]; | |
470 | u8 dst[IB_CM_COMPARE_SIZE]; | |
471 | ||
472 | if (!src_data || !dst_data) | |
473 | return 0; | |
474 | ||
475 | cm_mask_copy(src, src_data->data, dst_data->mask); | |
476 | cm_mask_copy(dst, dst_data->data, src_data->mask); | |
477 | return memcmp(src, dst, IB_CM_COMPARE_SIZE); | |
478 | } | |
479 | ||
480 | static int cm_compare_private_data(u8 *private_data, | |
481 | struct ib_cm_compare_data *dst_data) | |
482 | { | |
483 | u8 src[IB_CM_COMPARE_SIZE]; | |
484 | ||
485 | if (!dst_data) | |
486 | return 0; | |
487 | ||
488 | cm_mask_copy(src, private_data, dst_data->mask); | |
489 | return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); | |
490 | } | |
491 | ||
a88f4888 RD |
492 | /* |
493 | * Trivial helpers to strip endian annotation and compare; the | |
494 | * endianness doesn't actually matter since we just need a stable | |
495 | * order for the RB tree. | |
496 | */ | |
497 | static int be32_lt(__be32 a, __be32 b) | |
498 | { | |
499 | return (__force u32) a < (__force u32) b; | |
500 | } | |
501 | ||
502 | static int be32_gt(__be32 a, __be32 b) | |
503 | { | |
504 | return (__force u32) a > (__force u32) b; | |
505 | } | |
506 | ||
507 | static int be64_lt(__be64 a, __be64 b) | |
508 | { | |
509 | return (__force u64) a < (__force u64) b; | |
510 | } | |
511 | ||
512 | static int be64_gt(__be64 a, __be64 b) | |
513 | { | |
514 | return (__force u64) a > (__force u64) b; | |
515 | } | |
516 | ||
a977049d HR |
517 | static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
518 | { | |
519 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
520 | struct rb_node *parent = NULL; | |
521 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
522 | __be64 service_id = cm_id_priv->id.service_id; |
523 | __be64 service_mask = cm_id_priv->id.service_mask; | |
6e61d04f | 524 | int data_cmp; |
a977049d HR |
525 | |
526 | while (*link) { | |
527 | parent = *link; | |
528 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
529 | service_node); | |
6e61d04f SH |
530 | data_cmp = cm_compare_data(cm_id_priv->compare_data, |
531 | cur_cm_id_priv->compare_data); | |
a977049d | 532 | if ((cur_cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 533 | (service_mask & cur_cm_id_priv->id.service_id) && |
6e61d04f SH |
534 | (cm_id_priv->id.device == cur_cm_id_priv->id.device) && |
535 | !data_cmp) | |
07d357d0 SH |
536 | return cur_cm_id_priv; |
537 | ||
538 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
539 | link = &(*link)->rb_left; | |
540 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
541 | link = &(*link)->rb_right; | |
a88f4888 | 542 | else if (be64_lt(service_id, cur_cm_id_priv->id.service_id)) |
a977049d | 543 | link = &(*link)->rb_left; |
a88f4888 | 544 | else if (be64_gt(service_id, cur_cm_id_priv->id.service_id)) |
6e61d04f SH |
545 | link = &(*link)->rb_right; |
546 | else if (data_cmp < 0) | |
547 | link = &(*link)->rb_left; | |
a977049d HR |
548 | else |
549 | link = &(*link)->rb_right; | |
550 | } | |
551 | rb_link_node(&cm_id_priv->service_node, parent, link); | |
552 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
553 | return NULL; | |
554 | } | |
555 | ||
07d357d0 | 556 | static struct cm_id_private * cm_find_listen(struct ib_device *device, |
6e61d04f SH |
557 | __be64 service_id, |
558 | u8 *private_data) | |
a977049d HR |
559 | { |
560 | struct rb_node *node = cm.listen_service_table.rb_node; | |
561 | struct cm_id_private *cm_id_priv; | |
6e61d04f | 562 | int data_cmp; |
a977049d HR |
563 | |
564 | while (node) { | |
565 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
6e61d04f SH |
566 | data_cmp = cm_compare_private_data(private_data, |
567 | cm_id_priv->compare_data); | |
a977049d | 568 | if ((cm_id_priv->id.service_mask & service_id) == |
07d357d0 | 569 | cm_id_priv->id.service_id && |
6e61d04f | 570 | (cm_id_priv->id.device == device) && !data_cmp) |
a977049d | 571 | return cm_id_priv; |
07d357d0 SH |
572 | |
573 | if (device < cm_id_priv->id.device) | |
574 | node = node->rb_left; | |
575 | else if (device > cm_id_priv->id.device) | |
576 | node = node->rb_right; | |
a88f4888 | 577 | else if (be64_lt(service_id, cm_id_priv->id.service_id)) |
a977049d | 578 | node = node->rb_left; |
a88f4888 | 579 | else if (be64_gt(service_id, cm_id_priv->id.service_id)) |
6e61d04f SH |
580 | node = node->rb_right; |
581 | else if (data_cmp < 0) | |
582 | node = node->rb_left; | |
a977049d HR |
583 | else |
584 | node = node->rb_right; | |
585 | } | |
586 | return NULL; | |
587 | } | |
588 | ||
589 | static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info | |
590 | *timewait_info) | |
591 | { | |
592 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
593 | struct rb_node *parent = NULL; | |
594 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
595 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
596 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
597 | |
598 | while (*link) { | |
599 | parent = *link; | |
600 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
601 | remote_id_node); | |
a88f4888 | 602 | if (be32_lt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 603 | link = &(*link)->rb_left; |
a88f4888 | 604 | else if (be32_gt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 605 | link = &(*link)->rb_right; |
a88f4888 | 606 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 607 | link = &(*link)->rb_left; |
a88f4888 | 608 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
609 | link = &(*link)->rb_right; |
610 | else | |
611 | return cur_timewait_info; | |
612 | } | |
613 | timewait_info->inserted_remote_id = 1; | |
614 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
615 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
616 | return NULL; | |
617 | } | |
618 | ||
97f52eb4 SH |
619 | static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
620 | __be32 remote_id) | |
a977049d HR |
621 | { |
622 | struct rb_node *node = cm.remote_id_table.rb_node; | |
623 | struct cm_timewait_info *timewait_info; | |
624 | ||
625 | while (node) { | |
626 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
627 | remote_id_node); | |
a88f4888 | 628 | if (be32_lt(remote_id, timewait_info->work.remote_id)) |
a977049d | 629 | node = node->rb_left; |
a88f4888 | 630 | else if (be32_gt(remote_id, timewait_info->work.remote_id)) |
a977049d | 631 | node = node->rb_right; |
a88f4888 | 632 | else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d | 633 | node = node->rb_left; |
a88f4888 | 634 | else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d HR |
635 | node = node->rb_right; |
636 | else | |
637 | return timewait_info; | |
638 | } | |
639 | return NULL; | |
640 | } | |
641 | ||
642 | static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info | |
643 | *timewait_info) | |
644 | { | |
645 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
646 | struct rb_node *parent = NULL; | |
647 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
648 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
649 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
650 | |
651 | while (*link) { | |
652 | parent = *link; | |
653 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
654 | remote_qp_node); | |
a88f4888 | 655 | if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 656 | link = &(*link)->rb_left; |
a88f4888 | 657 | else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 658 | link = &(*link)->rb_right; |
a88f4888 | 659 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 660 | link = &(*link)->rb_left; |
a88f4888 | 661 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
662 | link = &(*link)->rb_right; |
663 | else | |
664 | return cur_timewait_info; | |
665 | } | |
666 | timewait_info->inserted_remote_qp = 1; | |
667 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
668 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
669 | return NULL; | |
670 | } | |
671 | ||
672 | static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private | |
673 | *cm_id_priv) | |
674 | { | |
675 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
676 | struct rb_node *parent = NULL; | |
677 | struct cm_id_private *cur_cm_id_priv; | |
678 | union ib_gid *port_gid = &cm_id_priv->av.dgid; | |
97f52eb4 | 679 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
680 | |
681 | while (*link) { | |
682 | parent = *link; | |
683 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
684 | sidr_id_node); | |
a88f4888 | 685 | if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d | 686 | link = &(*link)->rb_left; |
a88f4888 | 687 | else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d HR |
688 | link = &(*link)->rb_right; |
689 | else { | |
690 | int cmp; | |
691 | cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, | |
692 | sizeof *port_gid); | |
693 | if (cmp < 0) | |
694 | link = &(*link)->rb_left; | |
695 | else if (cmp > 0) | |
696 | link = &(*link)->rb_right; | |
697 | else | |
698 | return cur_cm_id_priv; | |
699 | } | |
700 | } | |
701 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
702 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
703 | return NULL; | |
704 | } | |
705 | ||
706 | static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, | |
707 | enum ib_cm_sidr_status status) | |
708 | { | |
709 | struct ib_cm_sidr_rep_param param; | |
710 | ||
711 | memset(¶m, 0, sizeof param); | |
712 | param.status = status; | |
713 | ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); | |
714 | } | |
715 | ||
07d357d0 SH |
716 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
717 | ib_cm_handler cm_handler, | |
a977049d HR |
718 | void *context) |
719 | { | |
720 | struct cm_id_private *cm_id_priv; | |
721 | int ret; | |
722 | ||
de6eb66b | 723 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
724 | if (!cm_id_priv) |
725 | return ERR_PTR(-ENOMEM); | |
726 | ||
a977049d | 727 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 728 | cm_id_priv->id.device = device; |
a977049d HR |
729 | cm_id_priv->id.cm_handler = cm_handler; |
730 | cm_id_priv->id.context = context; | |
354ba39c | 731 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d HR |
732 | ret = cm_alloc_id(cm_id_priv); |
733 | if (ret) | |
734 | goto error; | |
735 | ||
736 | spin_lock_init(&cm_id_priv->lock); | |
1b52fa98 | 737 | init_completion(&cm_id_priv->comp); |
a977049d HR |
738 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
739 | atomic_set(&cm_id_priv->work_count, -1); | |
740 | atomic_set(&cm_id_priv->refcount, 1); | |
741 | return &cm_id_priv->id; | |
742 | ||
743 | error: | |
744 | kfree(cm_id_priv); | |
745 | return ERR_PTR(-ENOMEM); | |
746 | } | |
747 | EXPORT_SYMBOL(ib_create_cm_id); | |
748 | ||
749 | static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) | |
750 | { | |
751 | struct cm_work *work; | |
752 | ||
753 | if (list_empty(&cm_id_priv->work_list)) | |
754 | return NULL; | |
755 | ||
756 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
757 | list_del(&work->list); | |
758 | return work; | |
759 | } | |
760 | ||
761 | static void cm_free_work(struct cm_work *work) | |
762 | { | |
763 | if (work->mad_recv_wc) | |
764 | ib_free_recv_mad(work->mad_recv_wc); | |
765 | kfree(work); | |
766 | } | |
767 | ||
768 | static inline int cm_convert_to_ms(int iba_time) | |
769 | { | |
770 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
771 | return 1 << max(iba_time - 8, 0); | |
772 | } | |
773 | ||
1d846126 SH |
774 | /* |
775 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time | |
776 | * Because of how ack_timeout is stored, adding one doubles the timeout. | |
777 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and | |
778 | * increment it (round up) only if the other is within 50%. | |
779 | */ | |
780 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) | |
781 | { | |
782 | int ack_timeout = packet_life_time + 1; | |
783 | ||
784 | if (ack_timeout >= ca_ack_delay) | |
785 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); | |
786 | else | |
787 | ack_timeout = ca_ack_delay + | |
788 | (ack_timeout >= (ca_ack_delay - 1)); | |
789 | ||
790 | return min(31, ack_timeout); | |
791 | } | |
792 | ||
a977049d HR |
793 | static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
794 | { | |
a977049d HR |
795 | if (timewait_info->inserted_remote_id) { |
796 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
797 | timewait_info->inserted_remote_id = 0; | |
798 | } | |
799 | ||
800 | if (timewait_info->inserted_remote_qp) { | |
801 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
802 | timewait_info->inserted_remote_qp = 0; | |
803 | } | |
a977049d HR |
804 | } |
805 | ||
97f52eb4 | 806 | static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
a977049d HR |
807 | { |
808 | struct cm_timewait_info *timewait_info; | |
809 | ||
de6eb66b | 810 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
811 | if (!timewait_info) |
812 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
813 | |
814 | timewait_info->work.local_id = local_id; | |
c4028958 | 815 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
a977049d HR |
816 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
817 | return timewait_info; | |
818 | } | |
819 | ||
820 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
821 | { | |
822 | int wait_time; | |
8575329d | 823 | unsigned long flags; |
a977049d | 824 | |
8575329d | 825 | spin_lock_irqsave(&cm.lock, flags); |
a70d0590 | 826 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d SH |
827 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
828 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 829 | |
a977049d HR |
830 | /* |
831 | * The cm_id could be destroyed by the user before we exit timewait. | |
832 | * To protect against this, we search for the cm_id after exiting | |
833 | * timewait before notifying the user that we've exited timewait. | |
834 | */ | |
835 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
1d846126 | 836 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d HR |
837 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
838 | msecs_to_jiffies(wait_time)); | |
839 | cm_id_priv->timewait_info = NULL; | |
840 | } | |
841 | ||
842 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
843 | { | |
8575329d SH |
844 | unsigned long flags; |
845 | ||
a977049d HR |
846 | cm_id_priv->id.state = IB_CM_IDLE; |
847 | if (cm_id_priv->timewait_info) { | |
8575329d | 848 | spin_lock_irqsave(&cm.lock, flags); |
a977049d | 849 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
8575329d | 850 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
851 | kfree(cm_id_priv->timewait_info); |
852 | cm_id_priv->timewait_info = NULL; | |
853 | } | |
854 | } | |
855 | ||
04c33543 | 856 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
857 | { |
858 | struct cm_id_private *cm_id_priv; | |
859 | struct cm_work *work; | |
a977049d HR |
860 | |
861 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
862 | retest: | |
24be6e81 | 863 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
864 | switch (cm_id->state) { |
865 | case IB_CM_LISTEN: | |
866 | cm_id->state = IB_CM_IDLE; | |
24be6e81 SH |
867 | spin_unlock_irq(&cm_id_priv->lock); |
868 | spin_lock_irq(&cm.lock); | |
a977049d | 869 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
24be6e81 | 870 | spin_unlock_irq(&cm.lock); |
a977049d HR |
871 | break; |
872 | case IB_CM_SIDR_REQ_SENT: | |
873 | cm_id->state = IB_CM_IDLE; | |
34816ad9 | 874 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 875 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
876 | break; |
877 | case IB_CM_SIDR_REQ_RCVD: | |
24be6e81 | 878 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
879 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
880 | break; | |
881 | case IB_CM_REQ_SENT: | |
227eca83 | 882 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 883 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 | 884 | ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
e971b8cd SH |
885 | &cm_id_priv->id.device->node_guid, |
886 | sizeof cm_id_priv->id.device->node_guid, | |
227eca83 SH |
887 | NULL, 0); |
888 | break; | |
04c33543 MT |
889 | case IB_CM_REQ_RCVD: |
890 | if (err == -ENOMEM) { | |
891 | /* Do not reject to allow future retries. */ | |
892 | cm_reset_to_idle(cm_id_priv); | |
24be6e81 | 893 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 | 894 | } else { |
24be6e81 | 895 | spin_unlock_irq(&cm_id_priv->lock); |
04c33543 MT |
896 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
897 | NULL, 0, NULL, 0); | |
898 | } | |
899 | break; | |
a977049d HR |
900 | case IB_CM_MRA_REQ_RCVD: |
901 | case IB_CM_REP_SENT: | |
902 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 903 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 904 | /* Fall through */ |
a977049d HR |
905 | case IB_CM_MRA_REQ_SENT: |
906 | case IB_CM_REP_RCVD: | |
907 | case IB_CM_MRA_REP_SENT: | |
24be6e81 | 908 | spin_unlock_irq(&cm_id_priv->lock); |
227eca83 SH |
909 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
910 | NULL, 0, NULL, 0); | |
a977049d HR |
911 | break; |
912 | case IB_CM_ESTABLISHED: | |
24be6e81 | 913 | spin_unlock_irq(&cm_id_priv->lock); |
2622e18e SH |
914 | if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) |
915 | break; | |
a977049d HR |
916 | ib_send_cm_dreq(cm_id, NULL, 0); |
917 | goto retest; | |
918 | case IB_CM_DREQ_SENT: | |
34816ad9 | 919 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d | 920 | cm_enter_timewait(cm_id_priv); |
24be6e81 | 921 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
922 | break; |
923 | case IB_CM_DREQ_RCVD: | |
24be6e81 | 924 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
925 | ib_send_cm_drep(cm_id, NULL, 0); |
926 | break; | |
927 | default: | |
24be6e81 | 928 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
929 | break; |
930 | } | |
931 | ||
932 | cm_free_id(cm_id->local_id); | |
1b52fa98 SH |
933 | cm_deref_id(cm_id_priv); |
934 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
935 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
936 | cm_free_work(work); | |
6e61d04f SH |
937 | kfree(cm_id_priv->compare_data); |
938 | kfree(cm_id_priv->private_data); | |
a977049d HR |
939 | kfree(cm_id_priv); |
940 | } | |
04c33543 MT |
941 | |
942 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
943 | { | |
944 | cm_destroy_id(cm_id, 0); | |
945 | } | |
a977049d HR |
946 | EXPORT_SYMBOL(ib_destroy_cm_id); |
947 | ||
6e61d04f SH |
948 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
949 | struct ib_cm_compare_data *compare_data) | |
a977049d HR |
950 | { |
951 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
952 | unsigned long flags; | |
953 | int ret = 0; | |
954 | ||
9c3da099 | 955 | service_mask = service_mask ? service_mask : ~cpu_to_be64(0); |
a977049d HR |
956 | service_id &= service_mask; |
957 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
958 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
959 | return -EINVAL; | |
960 | ||
961 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
6e61d04f SH |
962 | if (cm_id->state != IB_CM_IDLE) |
963 | return -EINVAL; | |
964 | ||
965 | if (compare_data) { | |
966 | cm_id_priv->compare_data = kzalloc(sizeof *compare_data, | |
967 | GFP_KERNEL); | |
968 | if (!cm_id_priv->compare_data) | |
969 | return -ENOMEM; | |
970 | cm_mask_copy(cm_id_priv->compare_data->data, | |
971 | compare_data->data, compare_data->mask); | |
972 | memcpy(cm_id_priv->compare_data->mask, compare_data->mask, | |
973 | IB_CM_COMPARE_SIZE); | |
974 | } | |
a977049d HR |
975 | |
976 | cm_id->state = IB_CM_LISTEN; | |
977 | ||
978 | spin_lock_irqsave(&cm.lock, flags); | |
979 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
97f52eb4 | 980 | cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
9c3da099 | 981 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
982 | } else { |
983 | cm_id->service_id = service_id; | |
984 | cm_id->service_mask = service_mask; | |
985 | } | |
986 | cur_cm_id_priv = cm_insert_listen(cm_id_priv); | |
987 | spin_unlock_irqrestore(&cm.lock, flags); | |
988 | ||
989 | if (cur_cm_id_priv) { | |
990 | cm_id->state = IB_CM_IDLE; | |
6e61d04f SH |
991 | kfree(cm_id_priv->compare_data); |
992 | cm_id_priv->compare_data = NULL; | |
a977049d HR |
993 | ret = -EBUSY; |
994 | } | |
995 | return ret; | |
996 | } | |
997 | EXPORT_SYMBOL(ib_cm_listen); | |
998 | ||
97f52eb4 SH |
999 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
1000 | enum cm_msg_sequence msg_seq) | |
a977049d HR |
1001 | { |
1002 | u64 hi_tid, low_tid; | |
1003 | ||
1004 | hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
97f52eb4 SH |
1005 | low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
1006 | (msg_seq << 30)); | |
a977049d HR |
1007 | return cpu_to_be64(hi_tid | low_tid); |
1008 | } | |
1009 | ||
1010 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 1011 | __be16 attr_id, __be64 tid) |
a977049d HR |
1012 | { |
1013 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
1014 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
1015 | hdr->class_version = IB_CM_CLASS_VERSION; | |
1016 | hdr->method = IB_MGMT_METHOD_SEND; | |
1017 | hdr->attr_id = attr_id; | |
1018 | hdr->tid = tid; | |
1019 | } | |
1020 | ||
1021 | static void cm_format_req(struct cm_req_msg *req_msg, | |
1022 | struct cm_id_private *cm_id_priv, | |
1023 | struct ib_cm_req_param *param) | |
1024 | { | |
3971c9f6 SH |
1025 | struct ib_sa_path_rec *pri_path = param->primary_path; |
1026 | struct ib_sa_path_rec *alt_path = param->alternate_path; | |
1027 | ||
a977049d HR |
1028 | cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
1029 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); | |
1030 | ||
1031 | req_msg->local_comm_id = cm_id_priv->id.local_id; | |
1032 | req_msg->service_id = param->service_id; | |
e971b8cd | 1033 | req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1034 | cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
a977049d HR |
1035 | cm_req_set_init_depth(req_msg, param->initiator_depth); |
1036 | cm_req_set_remote_resp_timeout(req_msg, | |
1037 | param->remote_cm_response_timeout); | |
1038 | cm_req_set_qp_type(req_msg, param->qp_type); | |
1039 | cm_req_set_flow_ctrl(req_msg, param->flow_control); | |
1040 | cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); | |
1041 | cm_req_set_local_resp_timeout(req_msg, | |
1042 | param->local_cm_response_timeout); | |
a977049d HR |
1043 | req_msg->pkey = param->primary_path->pkey; |
1044 | cm_req_set_path_mtu(req_msg, param->primary_path->mtu); | |
a977049d | 1045 | cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); |
d26a360b SH |
1046 | |
1047 | if (param->qp_type != IB_QPT_XRC_INI) { | |
1048 | cm_req_set_resp_res(req_msg, param->responder_resources); | |
1049 | cm_req_set_retry_count(req_msg, param->retry_count); | |
1050 | cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); | |
1051 | cm_req_set_srq(req_msg, param->srq); | |
1052 | } | |
a977049d | 1053 | |
3971c9f6 SH |
1054 | if (pri_path->hop_limit <= 1) { |
1055 | req_msg->primary_local_lid = pri_path->slid; | |
1056 | req_msg->primary_remote_lid = pri_path->dlid; | |
1057 | } else { | |
1058 | /* Work-around until there's a way to obtain remote LID info */ | |
1059 | req_msg->primary_local_lid = IB_LID_PERMISSIVE; | |
1060 | req_msg->primary_remote_lid = IB_LID_PERMISSIVE; | |
1061 | } | |
1062 | req_msg->primary_local_gid = pri_path->sgid; | |
1063 | req_msg->primary_remote_gid = pri_path->dgid; | |
1064 | cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); | |
1065 | cm_req_set_primary_packet_rate(req_msg, pri_path->rate); | |
1066 | req_msg->primary_traffic_class = pri_path->traffic_class; | |
1067 | req_msg->primary_hop_limit = pri_path->hop_limit; | |
1068 | cm_req_set_primary_sl(req_msg, pri_path->sl); | |
1069 | cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); | |
a977049d | 1070 | cm_req_set_primary_local_ack_timeout(req_msg, |
1d846126 | 1071 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1072 | pri_path->packet_life_time)); |
a977049d | 1073 | |
3971c9f6 SH |
1074 | if (alt_path) { |
1075 | if (alt_path->hop_limit <= 1) { | |
1076 | req_msg->alt_local_lid = alt_path->slid; | |
1077 | req_msg->alt_remote_lid = alt_path->dlid; | |
1078 | } else { | |
1079 | req_msg->alt_local_lid = IB_LID_PERMISSIVE; | |
1080 | req_msg->alt_remote_lid = IB_LID_PERMISSIVE; | |
1081 | } | |
1082 | req_msg->alt_local_gid = alt_path->sgid; | |
1083 | req_msg->alt_remote_gid = alt_path->dgid; | |
a977049d | 1084 | cm_req_set_alt_flow_label(req_msg, |
3971c9f6 SH |
1085 | alt_path->flow_label); |
1086 | cm_req_set_alt_packet_rate(req_msg, alt_path->rate); | |
1087 | req_msg->alt_traffic_class = alt_path->traffic_class; | |
1088 | req_msg->alt_hop_limit = alt_path->hop_limit; | |
1089 | cm_req_set_alt_sl(req_msg, alt_path->sl); | |
1090 | cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); | |
a977049d | 1091 | cm_req_set_alt_local_ack_timeout(req_msg, |
1d846126 | 1092 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1093 | alt_path->packet_life_time)); |
a977049d HR |
1094 | } |
1095 | ||
1096 | if (param->private_data && param->private_data_len) | |
1097 | memcpy(req_msg->private_data, param->private_data, | |
1098 | param->private_data_len); | |
1099 | } | |
1100 | ||
858119e1 | 1101 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d HR |
1102 | { |
1103 | /* peer-to-peer not supported */ | |
1104 | if (param->peer_to_peer) | |
1105 | return -EINVAL; | |
1106 | ||
1107 | if (!param->primary_path) | |
1108 | return -EINVAL; | |
1109 | ||
d26a360b SH |
1110 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC && |
1111 | param->qp_type != IB_QPT_XRC_INI) | |
a977049d HR |
1112 | return -EINVAL; |
1113 | ||
1114 | if (param->private_data && | |
1115 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
1116 | return -EINVAL; | |
1117 | ||
1118 | if (param->alternate_path && | |
1119 | (param->alternate_path->pkey != param->primary_path->pkey || | |
1120 | param->alternate_path->mtu != param->primary_path->mtu)) | |
1121 | return -EINVAL; | |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
1127 | struct ib_cm_req_param *param) | |
1128 | { | |
1129 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1130 | struct cm_req_msg *req_msg; |
1131 | unsigned long flags; | |
1132 | int ret; | |
1133 | ||
1134 | ret = cm_validate_req_param(param); | |
1135 | if (ret) | |
1136 | return ret; | |
1137 | ||
1138 | /* Verify that we're not in timewait. */ | |
1139 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1140 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1141 | if (cm_id->state != IB_CM_IDLE) { | |
1142 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1143 | ret = -EINVAL; | |
1144 | goto out; | |
1145 | } | |
1146 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1147 | ||
1148 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1149 | id.local_id); | |
75df23e2 SH |
1150 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1151 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
a977049d | 1152 | goto out; |
75df23e2 | 1153 | } |
a977049d HR |
1154 | |
1155 | ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); | |
1156 | if (ret) | |
1157 | goto error1; | |
1158 | if (param->alternate_path) { | |
1159 | ret = cm_init_av_by_path(param->alternate_path, | |
1160 | &cm_id_priv->alt_av); | |
1161 | if (ret) | |
1162 | goto error1; | |
1163 | } | |
1164 | cm_id->service_id = param->service_id; | |
9c3da099 | 1165 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
1166 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1167 | param->primary_path->packet_life_time) * 2 + | |
1168 | cm_convert_to_ms( | |
1169 | param->remote_cm_response_timeout); | |
1170 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1171 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1172 | cm_id_priv->responder_resources = param->responder_resources; | |
1173 | cm_id_priv->retry_count = param->retry_count; | |
1174 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1175 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1176 | cm_id_priv->qp_type = param->qp_type; |
a977049d HR |
1177 | |
1178 | ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); | |
1179 | if (ret) | |
1180 | goto error1; | |
1181 | ||
1182 | req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; | |
1183 | cm_format_req(req_msg, cm_id_priv, param); | |
1184 | cm_id_priv->tid = req_msg->hdr.tid; | |
34816ad9 | 1185 | cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1186 | cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
1187 | ||
1188 | cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); | |
1189 | cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); | |
a977049d HR |
1190 | |
1191 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
34816ad9 | 1192 | ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
a977049d HR |
1193 | if (ret) { |
1194 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1195 | goto error2; | |
1196 | } | |
1197 | BUG_ON(cm_id->state != IB_CM_IDLE); | |
1198 | cm_id->state = IB_CM_REQ_SENT; | |
1199 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1200 | return 0; | |
1201 | ||
1202 | error2: cm_free_msg(cm_id_priv->msg); | |
1203 | error1: kfree(cm_id_priv->timewait_info); | |
1204 | out: return ret; | |
1205 | } | |
1206 | EXPORT_SYMBOL(ib_send_cm_req); | |
1207 | ||
1208 | static int cm_issue_rej(struct cm_port *port, | |
1209 | struct ib_mad_recv_wc *mad_recv_wc, | |
1210 | enum ib_cm_rej_reason reason, | |
1211 | enum cm_msg_response msg_rejected, | |
1212 | void *ari, u8 ari_length) | |
1213 | { | |
1214 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1215 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1216 | int ret; | |
1217 | ||
1218 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1219 | if (ret) | |
1220 | return ret; | |
1221 | ||
1222 | /* We just need common CM header information. Cast to any message. */ | |
1223 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1224 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1225 | ||
1226 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
1227 | rej_msg->remote_comm_id = rcv_msg->local_comm_id; | |
1228 | rej_msg->local_comm_id = rcv_msg->remote_comm_id; | |
1229 | cm_rej_set_msg_rejected(rej_msg, msg_rejected); | |
97f52eb4 | 1230 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1231 | |
1232 | if (ari && ari_length) { | |
1233 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1234 | memcpy(rej_msg->ari, ari, ari_length); | |
1235 | } | |
1236 | ||
34816ad9 | 1237 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1238 | if (ret) |
1239 | cm_free_msg(msg); | |
1240 | ||
1241 | return ret; | |
1242 | } | |
1243 | ||
97f52eb4 SH |
1244 | static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
1245 | __be32 local_qpn, __be32 remote_qpn) | |
a977049d HR |
1246 | { |
1247 | return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || | |
1248 | ((local_ca_guid == remote_ca_guid) && | |
1249 | (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); | |
1250 | } | |
1251 | ||
858119e1 | 1252 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
a977049d HR |
1253 | struct ib_sa_path_rec *primary_path, |
1254 | struct ib_sa_path_rec *alt_path) | |
1255 | { | |
1256 | memset(primary_path, 0, sizeof *primary_path); | |
1257 | primary_path->dgid = req_msg->primary_local_gid; | |
1258 | primary_path->sgid = req_msg->primary_remote_gid; | |
1259 | primary_path->dlid = req_msg->primary_local_lid; | |
1260 | primary_path->slid = req_msg->primary_remote_lid; | |
1261 | primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); | |
1262 | primary_path->hop_limit = req_msg->primary_hop_limit; | |
1263 | primary_path->traffic_class = req_msg->primary_traffic_class; | |
1264 | primary_path->reversible = 1; | |
1265 | primary_path->pkey = req_msg->pkey; | |
1266 | primary_path->sl = cm_req_get_primary_sl(req_msg); | |
1267 | primary_path->mtu_selector = IB_SA_EQ; | |
1268 | primary_path->mtu = cm_req_get_path_mtu(req_msg); | |
1269 | primary_path->rate_selector = IB_SA_EQ; | |
1270 | primary_path->rate = cm_req_get_primary_packet_rate(req_msg); | |
1271 | primary_path->packet_life_time_selector = IB_SA_EQ; | |
1272 | primary_path->packet_life_time = | |
1273 | cm_req_get_primary_local_ack_timeout(req_msg); | |
1274 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); | |
1275 | ||
1276 | if (req_msg->alt_local_lid) { | |
1277 | memset(alt_path, 0, sizeof *alt_path); | |
1278 | alt_path->dgid = req_msg->alt_local_gid; | |
1279 | alt_path->sgid = req_msg->alt_remote_gid; | |
1280 | alt_path->dlid = req_msg->alt_local_lid; | |
1281 | alt_path->slid = req_msg->alt_remote_lid; | |
1282 | alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); | |
1283 | alt_path->hop_limit = req_msg->alt_hop_limit; | |
1284 | alt_path->traffic_class = req_msg->alt_traffic_class; | |
1285 | alt_path->reversible = 1; | |
1286 | alt_path->pkey = req_msg->pkey; | |
1287 | alt_path->sl = cm_req_get_alt_sl(req_msg); | |
1288 | alt_path->mtu_selector = IB_SA_EQ; | |
1289 | alt_path->mtu = cm_req_get_path_mtu(req_msg); | |
1290 | alt_path->rate_selector = IB_SA_EQ; | |
1291 | alt_path->rate = cm_req_get_alt_packet_rate(req_msg); | |
1292 | alt_path->packet_life_time_selector = IB_SA_EQ; | |
1293 | alt_path->packet_life_time = | |
1294 | cm_req_get_alt_local_ack_timeout(req_msg); | |
1295 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); | |
1296 | } | |
1297 | } | |
1298 | ||
1299 | static void cm_format_req_event(struct cm_work *work, | |
1300 | struct cm_id_private *cm_id_priv, | |
1301 | struct ib_cm_id *listen_id) | |
1302 | { | |
1303 | struct cm_req_msg *req_msg; | |
1304 | struct ib_cm_req_event_param *param; | |
1305 | ||
1306 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1307 | param = &work->cm_event.param.req_rcvd; | |
1308 | param->listen_id = listen_id; | |
a977049d HR |
1309 | param->port = cm_id_priv->av.port->port_num; |
1310 | param->primary_path = &work->path[0]; | |
1311 | if (req_msg->alt_local_lid) | |
1312 | param->alternate_path = &work->path[1]; | |
1313 | else | |
1314 | param->alternate_path = NULL; | |
1315 | param->remote_ca_guid = req_msg->local_ca_guid; | |
1316 | param->remote_qkey = be32_to_cpu(req_msg->local_qkey); | |
1317 | param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); | |
1318 | param->qp_type = cm_req_get_qp_type(req_msg); | |
1319 | param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); | |
1320 | param->responder_resources = cm_req_get_init_depth(req_msg); | |
1321 | param->initiator_depth = cm_req_get_resp_res(req_msg); | |
1322 | param->local_cm_response_timeout = | |
1323 | cm_req_get_remote_resp_timeout(req_msg); | |
1324 | param->flow_control = cm_req_get_flow_ctrl(req_msg); | |
1325 | param->remote_cm_response_timeout = | |
1326 | cm_req_get_local_resp_timeout(req_msg); | |
1327 | param->retry_count = cm_req_get_retry_count(req_msg); | |
1328 | param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
1329 | param->srq = cm_req_get_srq(req_msg); | |
1330 | work->cm_event.private_data = &req_msg->private_data; | |
1331 | } | |
1332 | ||
1333 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1334 | struct cm_work *work) | |
1335 | { | |
a977049d HR |
1336 | int ret; |
1337 | ||
1338 | /* We will typically only have the current event to report. */ | |
1339 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1340 | cm_free_work(work); | |
1341 | ||
1342 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1343 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1344 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1345 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1346 | BUG_ON(!work); |
1347 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, | |
1348 | &work->cm_event); | |
1349 | cm_free_work(work); | |
1350 | } | |
1351 | cm_deref_id(cm_id_priv); | |
1352 | if (ret) | |
04c33543 | 1353 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1354 | } |
1355 | ||
1356 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1357 | struct cm_id_private *cm_id_priv, | |
1358 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1359 | const void *private_data, u8 private_data_len) | |
1360 | { | |
1361 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
1362 | cm_mra_set_msg_mraed(mra_msg, msg_mraed); | |
1363 | mra_msg->local_comm_id = cm_id_priv->id.local_id; | |
1364 | mra_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1365 | cm_mra_set_service_timeout(mra_msg, service_timeout); | |
1366 | ||
1367 | if (private_data && private_data_len) | |
1368 | memcpy(mra_msg->private_data, private_data, private_data_len); | |
1369 | } | |
1370 | ||
1371 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1372 | struct cm_id_private *cm_id_priv, | |
1373 | enum ib_cm_rej_reason reason, | |
1374 | void *ari, | |
1375 | u8 ari_length, | |
1376 | const void *private_data, | |
1377 | u8 private_data_len) | |
1378 | { | |
1379 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); | |
1380 | rej_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1381 | ||
1382 | switch(cm_id_priv->id.state) { | |
1383 | case IB_CM_REQ_RCVD: | |
1384 | rej_msg->local_comm_id = 0; | |
1385 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1386 | break; | |
1387 | case IB_CM_MRA_REQ_SENT: | |
1388 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1389 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); | |
1390 | break; | |
1391 | case IB_CM_REP_RCVD: | |
1392 | case IB_CM_MRA_REP_SENT: | |
1393 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1394 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); | |
1395 | break; | |
1396 | default: | |
1397 | rej_msg->local_comm_id = cm_id_priv->id.local_id; | |
1398 | cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); | |
1399 | break; | |
1400 | } | |
1401 | ||
97f52eb4 | 1402 | rej_msg->reason = cpu_to_be16(reason); |
a977049d HR |
1403 | if (ari && ari_length) { |
1404 | cm_rej_set_reject_info_len(rej_msg, ari_length); | |
1405 | memcpy(rej_msg->ari, ari, ari_length); | |
1406 | } | |
1407 | ||
1408 | if (private_data && private_data_len) | |
1409 | memcpy(rej_msg->private_data, private_data, private_data_len); | |
1410 | } | |
1411 | ||
1412 | static void cm_dup_req_handler(struct cm_work *work, | |
1413 | struct cm_id_private *cm_id_priv) | |
1414 | { | |
1415 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1416 | int ret; |
1417 | ||
9af57b7a SH |
1418 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1419 | counter[CM_REQ_COUNTER]); | |
1420 | ||
a977049d HR |
1421 | /* Quick state check to discard duplicate REQs. */ |
1422 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) | |
1423 | return; | |
1424 | ||
1425 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1426 | if (ret) | |
1427 | return; | |
1428 | ||
24be6e81 | 1429 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1430 | switch (cm_id_priv->id.state) { |
1431 | case IB_CM_MRA_REQ_SENT: | |
1432 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1433 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1434 | cm_id_priv->private_data, | |
1435 | cm_id_priv->private_data_len); | |
1436 | break; | |
1437 | case IB_CM_TIMEWAIT: | |
1438 | cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, | |
1439 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); | |
1440 | break; | |
1441 | default: | |
1442 | goto unlock; | |
1443 | } | |
24be6e81 | 1444 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1445 | |
34816ad9 | 1446 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1447 | if (ret) |
1448 | goto free; | |
1449 | return; | |
1450 | ||
24be6e81 | 1451 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1452 | free: cm_free_msg(msg); |
1453 | } | |
1454 | ||
1455 | static struct cm_id_private * cm_match_req(struct cm_work *work, | |
1456 | struct cm_id_private *cm_id_priv) | |
1457 | { | |
1458 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1459 | struct cm_timewait_info *timewait_info; | |
1460 | struct cm_req_msg *req_msg; | |
a977049d HR |
1461 | |
1462 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1463 | ||
d998ccce | 1464 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1465 | spin_lock_irq(&cm.lock); |
a977049d | 1466 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d HR |
1467 | if (timewait_info) { |
1468 | cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, | |
1469 | timewait_info->work.remote_id); | |
24be6e81 | 1470 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1471 | if (cur_cm_id_priv) { |
1472 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1473 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1474 | } |
1475 | return NULL; | |
1476 | } | |
1477 | ||
1478 | /* Check for stale connections. */ | |
1479 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1480 | if (timewait_info) { | |
1481 | cm_cleanup_timewait(cm_id_priv->timewait_info); | |
24be6e81 | 1482 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1483 | cm_issue_rej(work->port, work->mad_recv_wc, |
1484 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
1485 | NULL, 0); | |
1486 | return NULL; | |
a977049d HR |
1487 | } |
1488 | ||
1489 | /* Find matching listen request. */ | |
07d357d0 | 1490 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
6e61d04f SH |
1491 | req_msg->service_id, |
1492 | req_msg->private_data); | |
a977049d | 1493 | if (!listen_cm_id_priv) { |
8575329d | 1494 | cm_cleanup_timewait(cm_id_priv->timewait_info); |
24be6e81 | 1495 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1496 | cm_issue_rej(work->port, work->mad_recv_wc, |
1497 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
1498 | NULL, 0); | |
8575329d | 1499 | goto out; |
a977049d HR |
1500 | } |
1501 | atomic_inc(&listen_cm_id_priv->refcount); | |
1502 | atomic_inc(&cm_id_priv->refcount); | |
1503 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
1504 | atomic_inc(&cm_id_priv->work_count); | |
24be6e81 | 1505 | spin_unlock_irq(&cm.lock); |
8575329d | 1506 | out: |
a977049d | 1507 | return listen_cm_id_priv; |
a977049d HR |
1508 | } |
1509 | ||
3971c9f6 SH |
1510 | /* |
1511 | * Work-around for inter-subnet connections. If the LIDs are permissive, | |
1512 | * we need to override the LID/SL data in the REQ with the LID information | |
1513 | * in the work completion. | |
1514 | */ | |
1515 | static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) | |
1516 | { | |
1517 | if (!cm_req_get_primary_subnet_local(req_msg)) { | |
1518 | if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { | |
1519 | req_msg->primary_local_lid = cpu_to_be16(wc->slid); | |
1520 | cm_req_set_primary_sl(req_msg, wc->sl); | |
1521 | } | |
1522 | ||
1523 | if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) | |
1524 | req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1525 | } | |
1526 | ||
1527 | if (!cm_req_get_alt_subnet_local(req_msg)) { | |
1528 | if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { | |
1529 | req_msg->alt_local_lid = cpu_to_be16(wc->slid); | |
1530 | cm_req_set_alt_sl(req_msg, wc->sl); | |
1531 | } | |
1532 | ||
1533 | if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) | |
1534 | req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); | |
1535 | } | |
1536 | } | |
1537 | ||
a977049d HR |
1538 | static int cm_req_handler(struct cm_work *work) |
1539 | { | |
1540 | struct ib_cm_id *cm_id; | |
1541 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; | |
1542 | struct cm_req_msg *req_msg; | |
1543 | int ret; | |
1544 | ||
1545 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1546 | ||
d4c4196f | 1547 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
1548 | if (IS_ERR(cm_id)) |
1549 | return PTR_ERR(cm_id); | |
1550 | ||
1551 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1552 | cm_id_priv->id.remote_id = req_msg->local_comm_id; | |
1553 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 1554 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
1555 | &cm_id_priv->av); |
1556 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1557 | id.local_id); | |
1558 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
1559 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
76842405 | 1560 | goto destroy; |
a977049d HR |
1561 | } |
1562 | cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; | |
1563 | cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; | |
1564 | cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1565 | ||
1566 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
1567 | if (!listen_cm_id_priv) { | |
1568 | ret = -EINVAL; | |
76842405 SH |
1569 | kfree(cm_id_priv->timewait_info); |
1570 | goto destroy; | |
a977049d HR |
1571 | } |
1572 | ||
1573 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; | |
1574 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
1575 | cm_id_priv->id.service_id = req_msg->service_id; | |
9c3da099 | 1576 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d | 1577 | |
3971c9f6 | 1578 | cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
a977049d | 1579 | cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
dd5f03be MB |
1580 | |
1581 | memcpy(work->path[0].dmac, cm_id_priv->av.ah_attr.dmac, ETH_ALEN); | |
1582 | work->path[0].vlan_id = cm_id_priv->av.ah_attr.vlan_id; | |
a977049d | 1583 | ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); |
76842405 | 1584 | if (ret) { |
d4c4196f | 1585 | ib_get_cached_gid(work->port->cm_dev->ib_device, |
76842405 SH |
1586 | work->port->port_num, 0, &work->path[0].sgid); |
1587 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, | |
1588 | &work->path[0].sgid, sizeof work->path[0].sgid, | |
1589 | NULL, 0); | |
1590 | goto rejected; | |
1591 | } | |
a977049d HR |
1592 | if (req_msg->alt_local_lid) { |
1593 | ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); | |
76842405 SH |
1594 | if (ret) { |
1595 | ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, | |
1596 | &work->path[0].sgid, | |
1597 | sizeof work->path[0].sgid, NULL, 0); | |
1598 | goto rejected; | |
1599 | } | |
a977049d HR |
1600 | } |
1601 | cm_id_priv->tid = req_msg->hdr.tid; | |
1602 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
1603 | cm_req_get_local_resp_timeout(req_msg)); | |
1604 | cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); | |
1605 | cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); | |
1606 | cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); | |
1607 | cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); | |
1608 | cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); | |
e1444b5a | 1609 | cm_id_priv->pkey = req_msg->pkey; |
a977049d | 1610 | cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
a977049d HR |
1611 | cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
1612 | cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); | |
ae7971a7 | 1613 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
a977049d HR |
1614 | |
1615 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
1616 | cm_process_work(cm_id_priv, work); | |
1617 | cm_deref_id(listen_cm_id_priv); | |
1618 | return 0; | |
1619 | ||
76842405 SH |
1620 | rejected: |
1621 | atomic_dec(&cm_id_priv->refcount); | |
a977049d | 1622 | cm_deref_id(listen_cm_id_priv); |
76842405 SH |
1623 | destroy: |
1624 | ib_destroy_cm_id(cm_id); | |
a977049d HR |
1625 | return ret; |
1626 | } | |
1627 | ||
1628 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
1629 | struct cm_id_private *cm_id_priv, | |
1630 | struct ib_cm_rep_param *param) | |
1631 | { | |
1632 | cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); | |
1633 | rep_msg->local_comm_id = cm_id_priv->id.local_id; | |
1634 | rep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
a977049d HR |
1635 | cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); |
1636 | rep_msg->resp_resources = param->responder_resources; | |
1d846126 SH |
1637 | cm_rep_set_target_ack_delay(rep_msg, |
1638 | cm_id_priv->av.port->cm_dev->ack_delay); | |
a977049d | 1639 | cm_rep_set_failover(rep_msg, param->failover_accepted); |
a977049d | 1640 | cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); |
e971b8cd | 1641 | rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
a977049d | 1642 | |
d26a360b SH |
1643 | if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) { |
1644 | rep_msg->initiator_depth = param->initiator_depth; | |
1645 | cm_rep_set_flow_ctrl(rep_msg, param->flow_control); | |
1646 | cm_rep_set_srq(rep_msg, param->srq); | |
ef700446 | 1647 | cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1648 | } else { |
1649 | cm_rep_set_srq(rep_msg, 1); | |
ef700446 | 1650 | cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num)); |
d26a360b SH |
1651 | } |
1652 | ||
a977049d HR |
1653 | if (param->private_data && param->private_data_len) |
1654 | memcpy(rep_msg->private_data, param->private_data, | |
1655 | param->private_data_len); | |
1656 | } | |
1657 | ||
1658 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
1659 | struct ib_cm_rep_param *param) | |
1660 | { | |
1661 | struct cm_id_private *cm_id_priv; | |
1662 | struct ib_mad_send_buf *msg; | |
1663 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1664 | unsigned long flags; |
1665 | int ret; | |
1666 | ||
1667 | if (param->private_data && | |
1668 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
1669 | return -EINVAL; | |
1670 | ||
1671 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1672 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1673 | if (cm_id->state != IB_CM_REQ_RCVD && | |
1674 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
1675 | ret = -EINVAL; | |
1676 | goto out; | |
1677 | } | |
1678 | ||
1679 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1680 | if (ret) | |
1681 | goto out; | |
1682 | ||
1683 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
1684 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 1685 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
1686 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
1687 | ||
34816ad9 | 1688 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1689 | if (ret) { |
1690 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1691 | cm_free_msg(msg); | |
1692 | return ret; | |
1693 | } | |
1694 | ||
1695 | cm_id->state = IB_CM_REP_SENT; | |
1696 | cm_id_priv->msg = msg; | |
1697 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1698 | cm_id_priv->responder_resources = param->responder_resources; | |
1699 | cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); | |
ef700446 | 1700 | cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF); |
a977049d HR |
1701 | |
1702 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1703 | return ret; | |
1704 | } | |
1705 | EXPORT_SYMBOL(ib_send_cm_rep); | |
1706 | ||
1707 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
1708 | struct cm_id_private *cm_id_priv, | |
1709 | const void *private_data, | |
1710 | u8 private_data_len) | |
1711 | { | |
1712 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
1713 | rtu_msg->local_comm_id = cm_id_priv->id.local_id; | |
1714 | rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
1715 | ||
1716 | if (private_data && private_data_len) | |
1717 | memcpy(rtu_msg->private_data, private_data, private_data_len); | |
1718 | } | |
1719 | ||
1720 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
1721 | const void *private_data, | |
1722 | u8 private_data_len) | |
1723 | { | |
1724 | struct cm_id_private *cm_id_priv; | |
1725 | struct ib_mad_send_buf *msg; | |
a977049d HR |
1726 | unsigned long flags; |
1727 | void *data; | |
1728 | int ret; | |
1729 | ||
1730 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
1731 | return -EINVAL; | |
1732 | ||
1733 | data = cm_copy_private_data(private_data, private_data_len); | |
1734 | if (IS_ERR(data)) | |
1735 | return PTR_ERR(data); | |
1736 | ||
1737 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1738 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
1739 | if (cm_id->state != IB_CM_REP_RCVD && | |
1740 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
1741 | ret = -EINVAL; | |
1742 | goto error; | |
1743 | } | |
1744 | ||
1745 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
1746 | if (ret) | |
1747 | goto error; | |
1748 | ||
1749 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1750 | private_data, private_data_len); | |
1751 | ||
34816ad9 | 1752 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1753 | if (ret) { |
1754 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1755 | cm_free_msg(msg); | |
1756 | kfree(data); | |
1757 | return ret; | |
1758 | } | |
1759 | ||
1760 | cm_id->state = IB_CM_ESTABLISHED; | |
1761 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
1762 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1763 | return 0; | |
1764 | ||
1765 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1766 | kfree(data); | |
1767 | return ret; | |
1768 | } | |
1769 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
1770 | ||
ef700446 | 1771 | static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type) |
a977049d HR |
1772 | { |
1773 | struct cm_rep_msg *rep_msg; | |
1774 | struct ib_cm_rep_event_param *param; | |
1775 | ||
1776 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1777 | param = &work->cm_event.param.rep_rcvd; | |
1778 | param->remote_ca_guid = rep_msg->local_ca_guid; | |
1779 | param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); | |
ef700446 | 1780 | param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type)); |
a977049d HR |
1781 | param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); |
1782 | param->responder_resources = rep_msg->initiator_depth; | |
1783 | param->initiator_depth = rep_msg->resp_resources; | |
1784 | param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); | |
1785 | param->failover_accepted = cm_rep_get_failover(rep_msg); | |
1786 | param->flow_control = cm_rep_get_flow_ctrl(rep_msg); | |
1787 | param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1788 | param->srq = cm_rep_get_srq(rep_msg); | |
1789 | work->cm_event.private_data = &rep_msg->private_data; | |
1790 | } | |
1791 | ||
1792 | static void cm_dup_rep_handler(struct cm_work *work) | |
1793 | { | |
1794 | struct cm_id_private *cm_id_priv; | |
1795 | struct cm_rep_msg *rep_msg; | |
1796 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1797 | int ret; |
1798 | ||
1799 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
1800 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, | |
1801 | rep_msg->local_comm_id); | |
1802 | if (!cm_id_priv) | |
1803 | return; | |
1804 | ||
9af57b7a SH |
1805 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1806 | counter[CM_REP_COUNTER]); | |
a977049d HR |
1807 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
1808 | if (ret) | |
1809 | goto deref; | |
1810 | ||
24be6e81 | 1811 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1812 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
1813 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
1814 | cm_id_priv->private_data, | |
1815 | cm_id_priv->private_data_len); | |
1816 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
1817 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1818 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
1819 | cm_id_priv->private_data, | |
1820 | cm_id_priv->private_data_len); | |
1821 | else | |
1822 | goto unlock; | |
24be6e81 | 1823 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1824 | |
34816ad9 | 1825 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1826 | if (ret) |
1827 | goto free; | |
1828 | goto deref; | |
1829 | ||
24be6e81 | 1830 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1831 | free: cm_free_msg(msg); |
1832 | deref: cm_deref_id(cm_id_priv); | |
1833 | } | |
1834 | ||
1835 | static int cm_rep_handler(struct cm_work *work) | |
1836 | { | |
1837 | struct cm_id_private *cm_id_priv; | |
1838 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
1839 | int ret; |
1840 | ||
1841 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
1842 | cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); | |
1843 | if (!cm_id_priv) { | |
1844 | cm_dup_rep_handler(work); | |
1845 | return -EINVAL; | |
1846 | } | |
1847 | ||
ef700446 | 1848 | cm_format_rep_event(work, cm_id_priv->qp_type); |
87fd1a11 | 1849 | |
24be6e81 | 1850 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1851 | switch (cm_id_priv->id.state) { |
1852 | case IB_CM_REQ_SENT: | |
1853 | case IB_CM_MRA_REQ_RCVD: | |
1854 | break; | |
1855 | default: | |
24be6e81 | 1856 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
1857 | ret = -EINVAL; |
1858 | goto error; | |
1859 | } | |
1860 | ||
a977049d HR |
1861 | cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
1862 | cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; | |
ef700446 | 1863 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d | 1864 | |
87fd1a11 | 1865 | spin_lock(&cm.lock); |
a977049d HR |
1866 | /* Check for duplicate REP. */ |
1867 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 1868 | spin_unlock(&cm.lock); |
24be6e81 | 1869 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1870 | ret = -EINVAL; |
1871 | goto error; | |
1872 | } | |
1873 | /* Check for a stale connection. */ | |
1874 | if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { | |
87fd1a11 SH |
1875 | rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
1876 | &cm.remote_id_table); | |
1877 | cm_id_priv->timewait_info->inserted_remote_id = 0; | |
1878 | spin_unlock(&cm.lock); | |
24be6e81 | 1879 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1880 | cm_issue_rej(work->port, work->mad_recv_wc, |
1881 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
1882 | NULL, 0); | |
1883 | ret = -EINVAL; | |
1884 | goto error; | |
1885 | } | |
87fd1a11 | 1886 | spin_unlock(&cm.lock); |
a977049d | 1887 | |
a977049d HR |
1888 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
1889 | cm_id_priv->id.remote_id = rep_msg->local_comm_id; | |
ef700446 | 1890 | cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d HR |
1891 | cm_id_priv->initiator_depth = rep_msg->resp_resources; |
1892 | cm_id_priv->responder_resources = rep_msg->initiator_depth; | |
1893 | cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); | |
1894 | cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); | |
1d846126 SH |
1895 | cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
1896 | cm_id_priv->av.timeout = | |
1897 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1898 | cm_id_priv->av.timeout - 1); | |
1899 | cm_id_priv->alt_av.timeout = | |
1900 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
1901 | cm_id_priv->alt_av.timeout - 1); | |
a977049d HR |
1902 | |
1903 | /* todo: handle peer_to_peer */ | |
1904 | ||
34816ad9 | 1905 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1906 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1907 | if (!ret) | |
1908 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1909 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1910 | |
1911 | if (ret) | |
1912 | cm_process_work(cm_id_priv, work); | |
1913 | else | |
1914 | cm_deref_id(cm_id_priv); | |
1915 | return 0; | |
1916 | ||
87fd1a11 | 1917 | error: |
a977049d HR |
1918 | cm_deref_id(cm_id_priv); |
1919 | return ret; | |
1920 | } | |
1921 | ||
1922 | static int cm_establish_handler(struct cm_work *work) | |
1923 | { | |
1924 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
1925 | int ret; |
1926 | ||
e1444b5a | 1927 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
1928 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
1929 | if (!cm_id_priv) | |
1930 | return -EINVAL; | |
1931 | ||
24be6e81 | 1932 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1933 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 1934 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1935 | goto out; |
1936 | } | |
1937 | ||
34816ad9 | 1938 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1939 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1940 | if (!ret) | |
1941 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1942 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1943 | |
1944 | if (ret) | |
1945 | cm_process_work(cm_id_priv, work); | |
1946 | else | |
1947 | cm_deref_id(cm_id_priv); | |
1948 | return 0; | |
1949 | out: | |
1950 | cm_deref_id(cm_id_priv); | |
1951 | return -EINVAL; | |
1952 | } | |
1953 | ||
1954 | static int cm_rtu_handler(struct cm_work *work) | |
1955 | { | |
1956 | struct cm_id_private *cm_id_priv; | |
1957 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
1958 | int ret; |
1959 | ||
1960 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
1961 | cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, | |
1962 | rtu_msg->local_comm_id); | |
1963 | if (!cm_id_priv) | |
1964 | return -EINVAL; | |
1965 | ||
1966 | work->cm_event.private_data = &rtu_msg->private_data; | |
1967 | ||
24be6e81 | 1968 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1969 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
1970 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 1971 | spin_unlock_irq(&cm_id_priv->lock); |
9af57b7a SH |
1972 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
1973 | counter[CM_RTU_COUNTER]); | |
a977049d HR |
1974 | goto out; |
1975 | } | |
1976 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
1977 | ||
34816ad9 | 1978 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
1979 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
1980 | if (!ret) | |
1981 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 1982 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
1983 | |
1984 | if (ret) | |
1985 | cm_process_work(cm_id_priv, work); | |
1986 | else | |
1987 | cm_deref_id(cm_id_priv); | |
1988 | return 0; | |
1989 | out: | |
1990 | cm_deref_id(cm_id_priv); | |
1991 | return -EINVAL; | |
1992 | } | |
1993 | ||
1994 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
1995 | struct cm_id_private *cm_id_priv, | |
1996 | const void *private_data, | |
1997 | u8 private_data_len) | |
1998 | { | |
1999 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
2000 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); | |
2001 | dreq_msg->local_comm_id = cm_id_priv->id.local_id; | |
2002 | dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2003 | cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); | |
2004 | ||
2005 | if (private_data && private_data_len) | |
2006 | memcpy(dreq_msg->private_data, private_data, private_data_len); | |
2007 | } | |
2008 | ||
2009 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, | |
2010 | const void *private_data, | |
2011 | u8 private_data_len) | |
2012 | { | |
2013 | struct cm_id_private *cm_id_priv; | |
2014 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2015 | unsigned long flags; |
2016 | int ret; | |
2017 | ||
2018 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) | |
2019 | return -EINVAL; | |
2020 | ||
2021 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2022 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2023 | if (cm_id->state != IB_CM_ESTABLISHED) { | |
2024 | ret = -EINVAL; | |
2025 | goto out; | |
2026 | } | |
2027 | ||
8d8ac865 SH |
2028 | if (cm_id->lap_state == IB_CM_LAP_SENT || |
2029 | cm_id->lap_state == IB_CM_MRA_LAP_RCVD) | |
2030 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2031 | ||
a977049d HR |
2032 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2033 | if (ret) { | |
2034 | cm_enter_timewait(cm_id_priv); | |
2035 | goto out; | |
2036 | } | |
2037 | ||
2038 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
2039 | private_data, private_data_len); | |
34816ad9 | 2040 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2041 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
2042 | ||
34816ad9 | 2043 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2044 | if (ret) { |
2045 | cm_enter_timewait(cm_id_priv); | |
2046 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2047 | cm_free_msg(msg); | |
2048 | return ret; | |
2049 | } | |
2050 | ||
2051 | cm_id->state = IB_CM_DREQ_SENT; | |
2052 | cm_id_priv->msg = msg; | |
2053 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2054 | return ret; | |
2055 | } | |
2056 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
2057 | ||
2058 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
2059 | struct cm_id_private *cm_id_priv, | |
2060 | const void *private_data, | |
2061 | u8 private_data_len) | |
2062 | { | |
2063 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
2064 | drep_msg->local_comm_id = cm_id_priv->id.local_id; | |
2065 | drep_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2066 | ||
2067 | if (private_data && private_data_len) | |
2068 | memcpy(drep_msg->private_data, private_data, private_data_len); | |
2069 | } | |
2070 | ||
2071 | int ib_send_cm_drep(struct ib_cm_id *cm_id, | |
2072 | const void *private_data, | |
2073 | u8 private_data_len) | |
2074 | { | |
2075 | struct cm_id_private *cm_id_priv; | |
2076 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2077 | unsigned long flags; |
2078 | void *data; | |
2079 | int ret; | |
2080 | ||
2081 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) | |
2082 | return -EINVAL; | |
2083 | ||
2084 | data = cm_copy_private_data(private_data, private_data_len); | |
2085 | if (IS_ERR(data)) | |
2086 | return PTR_ERR(data); | |
2087 | ||
2088 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2089 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2090 | if (cm_id->state != IB_CM_DREQ_RCVD) { | |
2091 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2092 | kfree(data); | |
2093 | return -EINVAL; | |
2094 | } | |
2095 | ||
2096 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2097 | cm_enter_timewait(cm_id_priv); | |
2098 | ||
2099 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2100 | if (ret) | |
2101 | goto out; | |
2102 | ||
2103 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2104 | private_data, private_data_len); | |
2105 | ||
34816ad9 | 2106 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2107 | if (ret) { |
2108 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2109 | cm_free_msg(msg); | |
2110 | return ret; | |
2111 | } | |
2112 | ||
2113 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2114 | return ret; | |
2115 | } | |
2116 | EXPORT_SYMBOL(ib_send_cm_drep); | |
2117 | ||
82a9c16a SH |
2118 | static int cm_issue_drep(struct cm_port *port, |
2119 | struct ib_mad_recv_wc *mad_recv_wc) | |
2120 | { | |
2121 | struct ib_mad_send_buf *msg = NULL; | |
2122 | struct cm_dreq_msg *dreq_msg; | |
2123 | struct cm_drep_msg *drep_msg; | |
2124 | int ret; | |
2125 | ||
2126 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
2127 | if (ret) | |
2128 | return ret; | |
2129 | ||
2130 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
2131 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
2132 | ||
2133 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
2134 | drep_msg->remote_comm_id = dreq_msg->local_comm_id; | |
2135 | drep_msg->local_comm_id = dreq_msg->remote_comm_id; | |
2136 | ||
2137 | ret = ib_post_send_mad(msg, NULL); | |
2138 | if (ret) | |
2139 | cm_free_msg(msg); | |
2140 | ||
2141 | return ret; | |
2142 | } | |
2143 | ||
a977049d HR |
2144 | static int cm_dreq_handler(struct cm_work *work) |
2145 | { | |
2146 | struct cm_id_private *cm_id_priv; | |
2147 | struct cm_dreq_msg *dreq_msg; | |
2148 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2149 | int ret; |
2150 | ||
2151 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
2152 | cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, | |
2153 | dreq_msg->local_comm_id); | |
82a9c16a | 2154 | if (!cm_id_priv) { |
9af57b7a SH |
2155 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2156 | counter[CM_DREQ_COUNTER]); | |
82a9c16a | 2157 | cm_issue_drep(work->port, work->mad_recv_wc); |
a977049d | 2158 | return -EINVAL; |
82a9c16a | 2159 | } |
a977049d HR |
2160 | |
2161 | work->cm_event.private_data = &dreq_msg->private_data; | |
2162 | ||
24be6e81 | 2163 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2164 | if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
2165 | goto unlock; | |
2166 | ||
2167 | switch (cm_id_priv->id.state) { | |
2168 | case IB_CM_REP_SENT: | |
2169 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2170 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2171 | break; |
2172 | case IB_CM_ESTABLISHED: | |
8d8ac865 SH |
2173 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || |
2174 | cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2175 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); | |
2176 | break; | |
a977049d HR |
2177 | case IB_CM_MRA_REP_RCVD: |
2178 | break; | |
2179 | case IB_CM_TIMEWAIT: | |
9af57b7a SH |
2180 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2181 | counter[CM_DREQ_COUNTER]); | |
a977049d HR |
2182 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2183 | goto unlock; | |
2184 | ||
2185 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2186 | cm_id_priv->private_data, | |
2187 | cm_id_priv->private_data_len); | |
24be6e81 | 2188 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2189 | |
34816ad9 | 2190 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2191 | cm_free_msg(msg); |
2192 | goto deref; | |
9af57b7a SH |
2193 | case IB_CM_DREQ_RCVD: |
2194 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2195 | counter[CM_DREQ_COUNTER]); | |
2196 | goto unlock; | |
a977049d HR |
2197 | default: |
2198 | goto unlock; | |
2199 | } | |
2200 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
2201 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
2202 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2203 | if (!ret) | |
2204 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2205 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2206 | |
2207 | if (ret) | |
2208 | cm_process_work(cm_id_priv, work); | |
2209 | else | |
2210 | cm_deref_id(cm_id_priv); | |
2211 | return 0; | |
2212 | ||
24be6e81 | 2213 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2214 | deref: cm_deref_id(cm_id_priv); |
2215 | return -EINVAL; | |
2216 | } | |
2217 | ||
2218 | static int cm_drep_handler(struct cm_work *work) | |
2219 | { | |
2220 | struct cm_id_private *cm_id_priv; | |
2221 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2222 | int ret; |
2223 | ||
2224 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2225 | cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, | |
2226 | drep_msg->local_comm_id); | |
2227 | if (!cm_id_priv) | |
2228 | return -EINVAL; | |
2229 | ||
2230 | work->cm_event.private_data = &drep_msg->private_data; | |
2231 | ||
24be6e81 | 2232 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2233 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2234 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2235 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2236 | goto out; |
2237 | } | |
2238 | cm_enter_timewait(cm_id_priv); | |
2239 | ||
34816ad9 | 2240 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2241 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2242 | if (!ret) | |
2243 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2244 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2245 | |
2246 | if (ret) | |
2247 | cm_process_work(cm_id_priv, work); | |
2248 | else | |
2249 | cm_deref_id(cm_id_priv); | |
2250 | return 0; | |
2251 | out: | |
2252 | cm_deref_id(cm_id_priv); | |
2253 | return -EINVAL; | |
2254 | } | |
2255 | ||
2256 | int ib_send_cm_rej(struct ib_cm_id *cm_id, | |
2257 | enum ib_cm_rej_reason reason, | |
2258 | void *ari, | |
2259 | u8 ari_length, | |
2260 | const void *private_data, | |
2261 | u8 private_data_len) | |
2262 | { | |
2263 | struct cm_id_private *cm_id_priv; | |
2264 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2265 | unsigned long flags; |
2266 | int ret; | |
2267 | ||
2268 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || | |
2269 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2270 | return -EINVAL; | |
2271 | ||
2272 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2273 | ||
2274 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2275 | switch (cm_id->state) { | |
2276 | case IB_CM_REQ_SENT: | |
2277 | case IB_CM_MRA_REQ_RCVD: | |
2278 | case IB_CM_REQ_RCVD: | |
2279 | case IB_CM_MRA_REQ_SENT: | |
2280 | case IB_CM_REP_RCVD: | |
2281 | case IB_CM_MRA_REP_SENT: | |
2282 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2283 | if (!ret) | |
2284 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2285 | cm_id_priv, reason, ari, ari_length, | |
2286 | private_data, private_data_len); | |
2287 | ||
2288 | cm_reset_to_idle(cm_id_priv); | |
2289 | break; | |
2290 | case IB_CM_REP_SENT: | |
2291 | case IB_CM_MRA_REP_RCVD: | |
2292 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2293 | if (!ret) | |
2294 | cm_format_rej((struct cm_rej_msg *) msg->mad, | |
2295 | cm_id_priv, reason, ari, ari_length, | |
2296 | private_data, private_data_len); | |
2297 | ||
2298 | cm_enter_timewait(cm_id_priv); | |
2299 | break; | |
2300 | default: | |
2301 | ret = -EINVAL; | |
2302 | goto out; | |
2303 | } | |
2304 | ||
2305 | if (ret) | |
2306 | goto out; | |
2307 | ||
34816ad9 | 2308 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2309 | if (ret) |
2310 | cm_free_msg(msg); | |
2311 | ||
2312 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2313 | return ret; | |
2314 | } | |
2315 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2316 | ||
2317 | static void cm_format_rej_event(struct cm_work *work) | |
2318 | { | |
2319 | struct cm_rej_msg *rej_msg; | |
2320 | struct ib_cm_rej_event_param *param; | |
2321 | ||
2322 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2323 | param = &work->cm_event.param.rej_rcvd; | |
2324 | param->ari = rej_msg->ari; | |
2325 | param->ari_length = cm_rej_get_reject_info_len(rej_msg); | |
97f52eb4 | 2326 | param->reason = __be16_to_cpu(rej_msg->reason); |
a977049d HR |
2327 | work->cm_event.private_data = &rej_msg->private_data; |
2328 | } | |
2329 | ||
2330 | static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) | |
2331 | { | |
2332 | struct cm_timewait_info *timewait_info; | |
2333 | struct cm_id_private *cm_id_priv; | |
97f52eb4 | 2334 | __be32 remote_id; |
a977049d HR |
2335 | |
2336 | remote_id = rej_msg->local_comm_id; | |
2337 | ||
97f52eb4 | 2338 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
24be6e81 | 2339 | spin_lock_irq(&cm.lock); |
97f52eb4 | 2340 | timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
a977049d HR |
2341 | remote_id); |
2342 | if (!timewait_info) { | |
24be6e81 | 2343 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2344 | return NULL; |
2345 | } | |
f06d2653 SH |
2346 | cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
2347 | (timewait_info->work.local_id ^ | |
2348 | cm.random_id_operand)); | |
a977049d HR |
2349 | if (cm_id_priv) { |
2350 | if (cm_id_priv->id.remote_id == remote_id) | |
2351 | atomic_inc(&cm_id_priv->refcount); | |
2352 | else | |
2353 | cm_id_priv = NULL; | |
2354 | } | |
24be6e81 | 2355 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2356 | } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
2357 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); | |
2358 | else | |
2359 | cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); | |
2360 | ||
2361 | return cm_id_priv; | |
2362 | } | |
2363 | ||
2364 | static int cm_rej_handler(struct cm_work *work) | |
2365 | { | |
2366 | struct cm_id_private *cm_id_priv; | |
2367 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
2368 | int ret; |
2369 | ||
2370 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2371 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
2372 | if (!cm_id_priv) | |
2373 | return -EINVAL; | |
2374 | ||
2375 | cm_format_rej_event(work); | |
2376 | ||
24be6e81 | 2377 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2378 | switch (cm_id_priv->id.state) { |
2379 | case IB_CM_REQ_SENT: | |
2380 | case IB_CM_MRA_REQ_RCVD: | |
2381 | case IB_CM_REP_SENT: | |
2382 | case IB_CM_MRA_REP_RCVD: | |
34816ad9 | 2383 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2384 | /* fall through */ |
2385 | case IB_CM_REQ_RCVD: | |
2386 | case IB_CM_MRA_REQ_SENT: | |
97f52eb4 | 2387 | if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
2388 | cm_enter_timewait(cm_id_priv); |
2389 | else | |
2390 | cm_reset_to_idle(cm_id_priv); | |
2391 | break; | |
2392 | case IB_CM_DREQ_SENT: | |
34816ad9 | 2393 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2394 | /* fall through */ |
2395 | case IB_CM_REP_RCVD: | |
2396 | case IB_CM_MRA_REP_SENT: | |
a977049d HR |
2397 | cm_enter_timewait(cm_id_priv); |
2398 | break; | |
8d8ac865 SH |
2399 | case IB_CM_ESTABLISHED: |
2400 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT || | |
2401 | cm_id_priv->id.lap_state == IB_CM_LAP_SENT) { | |
2402 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT) | |
2403 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, | |
2404 | cm_id_priv->msg); | |
2405 | cm_enter_timewait(cm_id_priv); | |
2406 | break; | |
2407 | } | |
2408 | /* fall through */ | |
a977049d | 2409 | default: |
24be6e81 | 2410 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2411 | ret = -EINVAL; |
2412 | goto out; | |
2413 | } | |
2414 | ||
2415 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2416 | if (!ret) | |
2417 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2418 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2419 | |
2420 | if (ret) | |
2421 | cm_process_work(cm_id_priv, work); | |
2422 | else | |
2423 | cm_deref_id(cm_id_priv); | |
2424 | return 0; | |
2425 | out: | |
2426 | cm_deref_id(cm_id_priv); | |
2427 | return -EINVAL; | |
2428 | } | |
2429 | ||
2430 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
2431 | u8 service_timeout, | |
2432 | const void *private_data, | |
2433 | u8 private_data_len) | |
2434 | { | |
2435 | struct cm_id_private *cm_id_priv; | |
2436 | struct ib_mad_send_buf *msg; | |
de98b693 SH |
2437 | enum ib_cm_state cm_state; |
2438 | enum ib_cm_lap_state lap_state; | |
2439 | enum cm_msg_response msg_response; | |
a977049d HR |
2440 | void *data; |
2441 | unsigned long flags; | |
2442 | int ret; | |
2443 | ||
2444 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
2445 | return -EINVAL; | |
2446 | ||
2447 | data = cm_copy_private_data(private_data, private_data_len); | |
2448 | if (IS_ERR(data)) | |
2449 | return PTR_ERR(data); | |
2450 | ||
2451 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2452 | ||
2453 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2454 | switch(cm_id_priv->id.state) { | |
2455 | case IB_CM_REQ_RCVD: | |
de98b693 SH |
2456 | cm_state = IB_CM_MRA_REQ_SENT; |
2457 | lap_state = cm_id->lap_state; | |
2458 | msg_response = CM_MSG_RESPONSE_REQ; | |
a977049d HR |
2459 | break; |
2460 | case IB_CM_REP_RCVD: | |
de98b693 SH |
2461 | cm_state = IB_CM_MRA_REP_SENT; |
2462 | lap_state = cm_id->lap_state; | |
2463 | msg_response = CM_MSG_RESPONSE_REP; | |
a977049d HR |
2464 | break; |
2465 | case IB_CM_ESTABLISHED: | |
50a025c6 SH |
2466 | if (cm_id->lap_state == IB_CM_LAP_RCVD) { |
2467 | cm_state = cm_id->state; | |
2468 | lap_state = IB_CM_MRA_LAP_SENT; | |
2469 | msg_response = CM_MSG_RESPONSE_OTHER; | |
2470 | break; | |
2471 | } | |
de98b693 SH |
2472 | default: |
2473 | ret = -EINVAL; | |
2474 | goto error1; | |
2475 | } | |
2476 | ||
2477 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { | |
a977049d HR |
2478 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2479 | if (ret) | |
2480 | goto error1; | |
2481 | ||
2482 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
de98b693 | 2483 | msg_response, service_timeout, |
a977049d | 2484 | private_data, private_data_len); |
34816ad9 | 2485 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2486 | if (ret) |
2487 | goto error2; | |
a977049d | 2488 | } |
de98b693 SH |
2489 | |
2490 | cm_id->state = cm_state; | |
2491 | cm_id->lap_state = lap_state; | |
a977049d HR |
2492 | cm_id_priv->service_timeout = service_timeout; |
2493 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2494 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2495 | return 0; | |
2496 | ||
2497 | error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2498 | kfree(data); | |
2499 | return ret; | |
2500 | ||
2501 | error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2502 | kfree(data); | |
2503 | cm_free_msg(msg); | |
2504 | return ret; | |
2505 | } | |
2506 | EXPORT_SYMBOL(ib_send_cm_mra); | |
2507 | ||
2508 | static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) | |
2509 | { | |
2510 | switch (cm_mra_get_msg_mraed(mra_msg)) { | |
2511 | case CM_MSG_RESPONSE_REQ: | |
2512 | return cm_acquire_id(mra_msg->remote_comm_id, 0); | |
2513 | case CM_MSG_RESPONSE_REP: | |
2514 | case CM_MSG_RESPONSE_OTHER: | |
2515 | return cm_acquire_id(mra_msg->remote_comm_id, | |
2516 | mra_msg->local_comm_id); | |
2517 | default: | |
2518 | return NULL; | |
2519 | } | |
2520 | } | |
2521 | ||
2522 | static int cm_mra_handler(struct cm_work *work) | |
2523 | { | |
2524 | struct cm_id_private *cm_id_priv; | |
2525 | struct cm_mra_msg *mra_msg; | |
a977049d HR |
2526 | int timeout, ret; |
2527 | ||
2528 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
2529 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
2530 | if (!cm_id_priv) | |
2531 | return -EINVAL; | |
2532 | ||
2533 | work->cm_event.private_data = &mra_msg->private_data; | |
2534 | work->cm_event.param.mra_rcvd.service_timeout = | |
2535 | cm_mra_get_service_timeout(mra_msg); | |
2536 | timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + | |
1d846126 | 2537 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 2538 | |
24be6e81 | 2539 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2540 | switch (cm_id_priv->id.state) { |
2541 | case IB_CM_REQ_SENT: | |
2542 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || | |
2543 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2544 | cm_id_priv->msg, timeout)) |
a977049d HR |
2545 | goto out; |
2546 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
2547 | break; | |
2548 | case IB_CM_REP_SENT: | |
2549 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || | |
2550 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
34816ad9 | 2551 | cm_id_priv->msg, timeout)) |
a977049d HR |
2552 | goto out; |
2553 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
2554 | break; | |
2555 | case IB_CM_ESTABLISHED: | |
2556 | if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || | |
2557 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || | |
2558 | ib_modify_mad(cm_id_priv->av.port->mad_agent, | |
9af57b7a SH |
2559 | cm_id_priv->msg, timeout)) { |
2560 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
2561 | atomic_long_inc(&work->port-> | |
2562 | counter_group[CM_RECV_DUPLICATES]. | |
2563 | counter[CM_MRA_COUNTER]); | |
a977049d | 2564 | goto out; |
9af57b7a | 2565 | } |
a977049d HR |
2566 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
2567 | break; | |
9af57b7a SH |
2568 | case IB_CM_MRA_REQ_RCVD: |
2569 | case IB_CM_MRA_REP_RCVD: | |
2570 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2571 | counter[CM_MRA_COUNTER]); | |
2572 | /* fall through */ | |
a977049d HR |
2573 | default: |
2574 | goto out; | |
2575 | } | |
2576 | ||
2577 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
2578 | cm_id_priv->id.state; | |
2579 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2580 | if (!ret) | |
2581 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2582 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2583 | |
2584 | if (ret) | |
2585 | cm_process_work(cm_id_priv, work); | |
2586 | else | |
2587 | cm_deref_id(cm_id_priv); | |
2588 | return 0; | |
2589 | out: | |
24be6e81 | 2590 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2591 | cm_deref_id(cm_id_priv); |
2592 | return -EINVAL; | |
2593 | } | |
2594 | ||
2595 | static void cm_format_lap(struct cm_lap_msg *lap_msg, | |
2596 | struct cm_id_private *cm_id_priv, | |
2597 | struct ib_sa_path_rec *alternate_path, | |
2598 | const void *private_data, | |
2599 | u8 private_data_len) | |
2600 | { | |
2601 | cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, | |
2602 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); | |
2603 | lap_msg->local_comm_id = cm_id_priv->id.local_id; | |
2604 | lap_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2605 | cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); | |
2606 | /* todo: need remote CM response timeout */ | |
2607 | cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); | |
2608 | lap_msg->alt_local_lid = alternate_path->slid; | |
2609 | lap_msg->alt_remote_lid = alternate_path->dlid; | |
2610 | lap_msg->alt_local_gid = alternate_path->sgid; | |
2611 | lap_msg->alt_remote_gid = alternate_path->dgid; | |
2612 | cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); | |
2613 | cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); | |
2614 | lap_msg->alt_hop_limit = alternate_path->hop_limit; | |
2615 | cm_lap_set_packet_rate(lap_msg, alternate_path->rate); | |
2616 | cm_lap_set_sl(lap_msg, alternate_path->sl); | |
2617 | cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ | |
2618 | cm_lap_set_local_ack_timeout(lap_msg, | |
1d846126 SH |
2619 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
2620 | alternate_path->packet_life_time)); | |
a977049d HR |
2621 | |
2622 | if (private_data && private_data_len) | |
2623 | memcpy(lap_msg->private_data, private_data, private_data_len); | |
2624 | } | |
2625 | ||
2626 | int ib_send_cm_lap(struct ib_cm_id *cm_id, | |
2627 | struct ib_sa_path_rec *alternate_path, | |
2628 | const void *private_data, | |
2629 | u8 private_data_len) | |
2630 | { | |
2631 | struct cm_id_private *cm_id_priv; | |
2632 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2633 | unsigned long flags; |
2634 | int ret; | |
2635 | ||
2636 | if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) | |
2637 | return -EINVAL; | |
2638 | ||
2639 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2640 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2641 | if (cm_id->state != IB_CM_ESTABLISHED || | |
e1444b5a SH |
2642 | (cm_id->lap_state != IB_CM_LAP_UNINIT && |
2643 | cm_id->lap_state != IB_CM_LAP_IDLE)) { | |
a977049d HR |
2644 | ret = -EINVAL; |
2645 | goto out; | |
2646 | } | |
2647 | ||
e1444b5a SH |
2648 | ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
2649 | if (ret) | |
2650 | goto out; | |
1d846126 SH |
2651 | cm_id_priv->alt_av.timeout = |
2652 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2653 | cm_id_priv->alt_av.timeout - 1); | |
e1444b5a | 2654 | |
a977049d HR |
2655 | ret = cm_alloc_msg(cm_id_priv, &msg); |
2656 | if (ret) | |
2657 | goto out; | |
2658 | ||
2659 | cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, | |
2660 | alternate_path, private_data, private_data_len); | |
34816ad9 | 2661 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2662 | msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
2663 | ||
34816ad9 | 2664 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2665 | if (ret) { |
2666 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2667 | cm_free_msg(msg); | |
2668 | return ret; | |
2669 | } | |
2670 | ||
2671 | cm_id->lap_state = IB_CM_LAP_SENT; | |
2672 | cm_id_priv->msg = msg; | |
2673 | ||
2674 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2675 | return ret; | |
2676 | } | |
2677 | EXPORT_SYMBOL(ib_send_cm_lap); | |
2678 | ||
e1444b5a SH |
2679 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
2680 | struct ib_sa_path_rec *path, | |
a977049d HR |
2681 | struct cm_lap_msg *lap_msg) |
2682 | { | |
2683 | memset(path, 0, sizeof *path); | |
2684 | path->dgid = lap_msg->alt_local_gid; | |
2685 | path->sgid = lap_msg->alt_remote_gid; | |
2686 | path->dlid = lap_msg->alt_local_lid; | |
2687 | path->slid = lap_msg->alt_remote_lid; | |
2688 | path->flow_label = cm_lap_get_flow_label(lap_msg); | |
2689 | path->hop_limit = lap_msg->alt_hop_limit; | |
2690 | path->traffic_class = cm_lap_get_traffic_class(lap_msg); | |
2691 | path->reversible = 1; | |
e1444b5a | 2692 | path->pkey = cm_id_priv->pkey; |
a977049d HR |
2693 | path->sl = cm_lap_get_sl(lap_msg); |
2694 | path->mtu_selector = IB_SA_EQ; | |
e1444b5a | 2695 | path->mtu = cm_id_priv->path_mtu; |
a977049d HR |
2696 | path->rate_selector = IB_SA_EQ; |
2697 | path->rate = cm_lap_get_packet_rate(lap_msg); | |
2698 | path->packet_life_time_selector = IB_SA_EQ; | |
2699 | path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); | |
2700 | path->packet_life_time -= (path->packet_life_time > 0); | |
2701 | } | |
2702 | ||
2703 | static int cm_lap_handler(struct cm_work *work) | |
2704 | { | |
2705 | struct cm_id_private *cm_id_priv; | |
2706 | struct cm_lap_msg *lap_msg; | |
2707 | struct ib_cm_lap_event_param *param; | |
2708 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2709 | int ret; |
2710 | ||
2711 | /* todo: verify LAP request and send reject APR if invalid. */ | |
2712 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
2713 | cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, | |
2714 | lap_msg->local_comm_id); | |
2715 | if (!cm_id_priv) | |
2716 | return -EINVAL; | |
2717 | ||
2718 | param = &work->cm_event.param.lap_rcvd; | |
2719 | param->alternate_path = &work->path[0]; | |
e1444b5a | 2720 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
a977049d HR |
2721 | work->cm_event.private_data = &lap_msg->private_data; |
2722 | ||
24be6e81 | 2723 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2724 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
2725 | goto unlock; | |
2726 | ||
2727 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 2728 | case IB_CM_LAP_UNINIT: |
a977049d HR |
2729 | case IB_CM_LAP_IDLE: |
2730 | break; | |
2731 | case IB_CM_MRA_LAP_SENT: | |
9af57b7a SH |
2732 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
2733 | counter[CM_LAP_COUNTER]); | |
a977049d HR |
2734 | if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
2735 | goto unlock; | |
2736 | ||
2737 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2738 | CM_MSG_RESPONSE_OTHER, | |
2739 | cm_id_priv->service_timeout, | |
2740 | cm_id_priv->private_data, | |
2741 | cm_id_priv->private_data_len); | |
24be6e81 | 2742 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2743 | |
34816ad9 | 2744 | if (ib_post_send_mad(msg, NULL)) |
a977049d HR |
2745 | cm_free_msg(msg); |
2746 | goto deref; | |
9af57b7a SH |
2747 | case IB_CM_LAP_RCVD: |
2748 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. | |
2749 | counter[CM_LAP_COUNTER]); | |
2750 | goto unlock; | |
a977049d HR |
2751 | default: |
2752 | goto unlock; | |
2753 | } | |
2754 | ||
2755 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; | |
2756 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e1444b5a SH |
2757 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2758 | work->mad_recv_wc->recv_buf.grh, | |
2759 | &cm_id_priv->av); | |
2760 | cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); | |
a977049d HR |
2761 | ret = atomic_inc_and_test(&cm_id_priv->work_count); |
2762 | if (!ret) | |
2763 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2764 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2765 | |
2766 | if (ret) | |
2767 | cm_process_work(cm_id_priv, work); | |
2768 | else | |
2769 | cm_deref_id(cm_id_priv); | |
2770 | return 0; | |
2771 | ||
24be6e81 | 2772 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2773 | deref: cm_deref_id(cm_id_priv); |
2774 | return -EINVAL; | |
2775 | } | |
2776 | ||
2777 | static void cm_format_apr(struct cm_apr_msg *apr_msg, | |
2778 | struct cm_id_private *cm_id_priv, | |
2779 | enum ib_cm_apr_status status, | |
2780 | void *info, | |
2781 | u8 info_length, | |
2782 | const void *private_data, | |
2783 | u8 private_data_len) | |
2784 | { | |
2785 | cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); | |
2786 | apr_msg->local_comm_id = cm_id_priv->id.local_id; | |
2787 | apr_msg->remote_comm_id = cm_id_priv->id.remote_id; | |
2788 | apr_msg->ap_status = (u8) status; | |
2789 | ||
2790 | if (info && info_length) { | |
2791 | apr_msg->info_length = info_length; | |
2792 | memcpy(apr_msg->info, info, info_length); | |
2793 | } | |
2794 | ||
2795 | if (private_data && private_data_len) | |
2796 | memcpy(apr_msg->private_data, private_data, private_data_len); | |
2797 | } | |
2798 | ||
2799 | int ib_send_cm_apr(struct ib_cm_id *cm_id, | |
2800 | enum ib_cm_apr_status status, | |
2801 | void *info, | |
2802 | u8 info_length, | |
2803 | const void *private_data, | |
2804 | u8 private_data_len) | |
2805 | { | |
2806 | struct cm_id_private *cm_id_priv; | |
2807 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2808 | unsigned long flags; |
2809 | int ret; | |
2810 | ||
2811 | if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || | |
2812 | (info && info_length > IB_CM_APR_INFO_LENGTH)) | |
2813 | return -EINVAL; | |
2814 | ||
2815 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2816 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2817 | if (cm_id->state != IB_CM_ESTABLISHED || | |
2818 | (cm_id->lap_state != IB_CM_LAP_RCVD && | |
2819 | cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { | |
2820 | ret = -EINVAL; | |
2821 | goto out; | |
2822 | } | |
2823 | ||
2824 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2825 | if (ret) | |
2826 | goto out; | |
2827 | ||
2828 | cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, | |
2829 | info, info_length, private_data, private_data_len); | |
34816ad9 | 2830 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2831 | if (ret) { |
2832 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2833 | cm_free_msg(msg); | |
2834 | return ret; | |
2835 | } | |
2836 | ||
2837 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
2838 | out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2839 | return ret; | |
2840 | } | |
2841 | EXPORT_SYMBOL(ib_send_cm_apr); | |
2842 | ||
2843 | static int cm_apr_handler(struct cm_work *work) | |
2844 | { | |
2845 | struct cm_id_private *cm_id_priv; | |
2846 | struct cm_apr_msg *apr_msg; | |
a977049d HR |
2847 | int ret; |
2848 | ||
2849 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; | |
2850 | cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, | |
2851 | apr_msg->local_comm_id); | |
2852 | if (!cm_id_priv) | |
2853 | return -EINVAL; /* Unmatched reply. */ | |
2854 | ||
2855 | work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; | |
2856 | work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; | |
2857 | work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; | |
2858 | work->cm_event.private_data = &apr_msg->private_data; | |
2859 | ||
24be6e81 | 2860 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2861 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
2862 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
2863 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 2864 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2865 | goto out; |
2866 | } | |
2867 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
34816ad9 | 2868 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
a977049d HR |
2869 | cm_id_priv->msg = NULL; |
2870 | ||
2871 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2872 | if (!ret) | |
2873 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
24be6e81 | 2874 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2875 | |
2876 | if (ret) | |
2877 | cm_process_work(cm_id_priv, work); | |
2878 | else | |
2879 | cm_deref_id(cm_id_priv); | |
2880 | return 0; | |
2881 | out: | |
2882 | cm_deref_id(cm_id_priv); | |
2883 | return -EINVAL; | |
2884 | } | |
2885 | ||
2886 | static int cm_timewait_handler(struct cm_work *work) | |
2887 | { | |
2888 | struct cm_timewait_info *timewait_info; | |
2889 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
2890 | int ret; |
2891 | ||
2892 | timewait_info = (struct cm_timewait_info *)work; | |
8575329d SH |
2893 | spin_lock_irq(&cm.lock); |
2894 | list_del(&timewait_info->list); | |
2895 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
2896 | |
2897 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
2898 | timewait_info->work.remote_id); | |
2899 | if (!cm_id_priv) | |
2900 | return -EINVAL; | |
2901 | ||
8575329d | 2902 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2903 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
2904 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 2905 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2906 | goto out; |
2907 | } | |
2908 | cm_id_priv->id.state = IB_CM_IDLE; | |
2909 | ret = atomic_inc_and_test(&cm_id_priv->work_count); | |
2910 | if (!ret) | |
2911 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
8575329d | 2912 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2913 | |
2914 | if (ret) | |
2915 | cm_process_work(cm_id_priv, work); | |
2916 | else | |
2917 | cm_deref_id(cm_id_priv); | |
2918 | return 0; | |
2919 | out: | |
2920 | cm_deref_id(cm_id_priv); | |
2921 | return -EINVAL; | |
2922 | } | |
2923 | ||
2924 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
2925 | struct cm_id_private *cm_id_priv, | |
2926 | struct ib_cm_sidr_req_param *param) | |
2927 | { | |
2928 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
2929 | cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); | |
2930 | sidr_req_msg->request_id = cm_id_priv->id.local_id; | |
a88f4888 | 2931 | sidr_req_msg->pkey = param->path->pkey; |
a977049d HR |
2932 | sidr_req_msg->service_id = param->service_id; |
2933 | ||
2934 | if (param->private_data && param->private_data_len) | |
2935 | memcpy(sidr_req_msg->private_data, param->private_data, | |
2936 | param->private_data_len); | |
2937 | } | |
2938 | ||
2939 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
2940 | struct ib_cm_sidr_req_param *param) | |
2941 | { | |
2942 | struct cm_id_private *cm_id_priv; | |
2943 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2944 | unsigned long flags; |
2945 | int ret; | |
2946 | ||
2947 | if (!param->path || (param->private_data && | |
2948 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
2949 | return -EINVAL; | |
2950 | ||
2951 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2952 | ret = cm_init_av_by_path(param->path, &cm_id_priv->av); | |
2953 | if (ret) | |
2954 | goto out; | |
2955 | ||
2956 | cm_id->service_id = param->service_id; | |
9c3da099 | 2957 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
2958 | cm_id_priv->timeout_ms = param->timeout_ms; |
2959 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
2960 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
2961 | if (ret) | |
2962 | goto out; | |
2963 | ||
2964 | cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, | |
2965 | param); | |
34816ad9 | 2966 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2967 | msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
2968 | ||
2969 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2970 | if (cm_id->state == IB_CM_IDLE) | |
34816ad9 | 2971 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2972 | else |
2973 | ret = -EINVAL; | |
2974 | ||
2975 | if (ret) { | |
2976 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2977 | cm_free_msg(msg); | |
2978 | goto out; | |
2979 | } | |
2980 | cm_id->state = IB_CM_SIDR_REQ_SENT; | |
2981 | cm_id_priv->msg = msg; | |
2982 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2983 | out: | |
2984 | return ret; | |
2985 | } | |
2986 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
2987 | ||
2988 | static void cm_format_sidr_req_event(struct cm_work *work, | |
2989 | struct ib_cm_id *listen_id) | |
2990 | { | |
2991 | struct cm_sidr_req_msg *sidr_req_msg; | |
2992 | struct ib_cm_sidr_req_event_param *param; | |
2993 | ||
2994 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
2995 | work->mad_recv_wc->recv_buf.mad; | |
2996 | param = &work->cm_event.param.sidr_req_rcvd; | |
97f52eb4 | 2997 | param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
a977049d | 2998 | param->listen_id = listen_id; |
a977049d HR |
2999 | param->port = work->port->port_num; |
3000 | work->cm_event.private_data = &sidr_req_msg->private_data; | |
3001 | } | |
3002 | ||
3003 | static int cm_sidr_req_handler(struct cm_work *work) | |
3004 | { | |
3005 | struct ib_cm_id *cm_id; | |
3006 | struct cm_id_private *cm_id_priv, *cur_cm_id_priv; | |
3007 | struct cm_sidr_req_msg *sidr_req_msg; | |
3008 | struct ib_wc *wc; | |
a977049d | 3009 | |
d4c4196f | 3010 | cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); |
a977049d HR |
3011 | if (IS_ERR(cm_id)) |
3012 | return PTR_ERR(cm_id); | |
3013 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3014 | ||
3015 | /* Record SGID/SLID and request ID for lookup. */ | |
3016 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
3017 | work->mad_recv_wc->recv_buf.mad; | |
3018 | wc = work->mad_recv_wc->wc; | |
97f52eb4 | 3019 | cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
a977049d HR |
3020 | cm_id_priv->av.dgid.global.interface_id = 0; |
3021 | cm_init_av_for_response(work->port, work->mad_recv_wc->wc, | |
ca222c6b | 3022 | work->mad_recv_wc->recv_buf.grh, |
a977049d HR |
3023 | &cm_id_priv->av); |
3024 | cm_id_priv->id.remote_id = sidr_req_msg->request_id; | |
a977049d HR |
3025 | cm_id_priv->tid = sidr_req_msg->hdr.tid; |
3026 | atomic_inc(&cm_id_priv->work_count); | |
3027 | ||
24be6e81 | 3028 | spin_lock_irq(&cm.lock); |
a977049d HR |
3029 | cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
3030 | if (cur_cm_id_priv) { | |
24be6e81 | 3031 | spin_unlock_irq(&cm.lock); |
9af57b7a SH |
3032 | atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. |
3033 | counter[CM_SIDR_REQ_COUNTER]); | |
a977049d HR |
3034 | goto out; /* Duplicate message. */ |
3035 | } | |
29c2731c | 3036 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
07d357d0 | 3037 | cur_cm_id_priv = cm_find_listen(cm_id->device, |
6e61d04f SH |
3038 | sidr_req_msg->service_id, |
3039 | sidr_req_msg->private_data); | |
a977049d | 3040 | if (!cur_cm_id_priv) { |
24be6e81 | 3041 | spin_unlock_irq(&cm.lock); |
6164c8cd | 3042 | cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
a977049d HR |
3043 | goto out; /* No match. */ |
3044 | } | |
3045 | atomic_inc(&cur_cm_id_priv->refcount); | |
29963437 | 3046 | atomic_inc(&cm_id_priv->refcount); |
24be6e81 | 3047 | spin_unlock_irq(&cm.lock); |
a977049d HR |
3048 | |
3049 | cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; | |
3050 | cm_id_priv->id.context = cur_cm_id_priv->id.context; | |
3051 | cm_id_priv->id.service_id = sidr_req_msg->service_id; | |
9c3da099 | 3052 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
a977049d HR |
3053 | |
3054 | cm_format_sidr_req_event(work, &cur_cm_id_priv->id); | |
3055 | cm_process_work(cm_id_priv, work); | |
3056 | cm_deref_id(cur_cm_id_priv); | |
3057 | return 0; | |
3058 | out: | |
3059 | ib_destroy_cm_id(&cm_id_priv->id); | |
3060 | return -EINVAL; | |
3061 | } | |
3062 | ||
3063 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
3064 | struct cm_id_private *cm_id_priv, | |
3065 | struct ib_cm_sidr_rep_param *param) | |
3066 | { | |
3067 | cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, | |
3068 | cm_id_priv->tid); | |
3069 | sidr_rep_msg->request_id = cm_id_priv->id.remote_id; | |
3070 | sidr_rep_msg->status = param->status; | |
3071 | cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); | |
3072 | sidr_rep_msg->service_id = cm_id_priv->id.service_id; | |
3073 | sidr_rep_msg->qkey = cpu_to_be32(param->qkey); | |
3074 | ||
3075 | if (param->info && param->info_length) | |
3076 | memcpy(sidr_rep_msg->info, param->info, param->info_length); | |
3077 | ||
3078 | if (param->private_data && param->private_data_len) | |
3079 | memcpy(sidr_rep_msg->private_data, param->private_data, | |
3080 | param->private_data_len); | |
3081 | } | |
3082 | ||
3083 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, | |
3084 | struct ib_cm_sidr_rep_param *param) | |
3085 | { | |
3086 | struct cm_id_private *cm_id_priv; | |
3087 | struct ib_mad_send_buf *msg; | |
a977049d HR |
3088 | unsigned long flags; |
3089 | int ret; | |
3090 | ||
3091 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || | |
3092 | (param->private_data && | |
3093 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
3094 | return -EINVAL; | |
3095 | ||
3096 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3097 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3098 | if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { | |
3099 | ret = -EINVAL; | |
3100 | goto error; | |
3101 | } | |
3102 | ||
3103 | ret = cm_alloc_msg(cm_id_priv, &msg); | |
3104 | if (ret) | |
3105 | goto error; | |
3106 | ||
3107 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
3108 | param); | |
34816ad9 | 3109 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
3110 | if (ret) { |
3111 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3112 | cm_free_msg(msg); | |
3113 | return ret; | |
3114 | } | |
3115 | cm_id->state = IB_CM_IDLE; | |
3116 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3117 | ||
3118 | spin_lock_irqsave(&cm.lock, flags); | |
3119 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
3120 | spin_unlock_irqrestore(&cm.lock, flags); | |
3121 | return 0; | |
3122 | ||
3123 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3124 | return ret; | |
3125 | } | |
3126 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
3127 | ||
3128 | static void cm_format_sidr_rep_event(struct cm_work *work) | |
3129 | { | |
3130 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3131 | struct ib_cm_sidr_rep_event_param *param; | |
3132 | ||
3133 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3134 | work->mad_recv_wc->recv_buf.mad; | |
3135 | param = &work->cm_event.param.sidr_rep_rcvd; | |
3136 | param->status = sidr_rep_msg->status; | |
3137 | param->qkey = be32_to_cpu(sidr_rep_msg->qkey); | |
3138 | param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); | |
3139 | param->info = &sidr_rep_msg->info; | |
3140 | param->info_len = sidr_rep_msg->info_length; | |
3141 | work->cm_event.private_data = &sidr_rep_msg->private_data; | |
3142 | } | |
3143 | ||
3144 | static int cm_sidr_rep_handler(struct cm_work *work) | |
3145 | { | |
3146 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3147 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
3148 | |
3149 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3150 | work->mad_recv_wc->recv_buf.mad; | |
3151 | cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); | |
3152 | if (!cm_id_priv) | |
3153 | return -EINVAL; /* Unmatched reply. */ | |
3154 | ||
24be6e81 | 3155 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 3156 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 3157 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3158 | goto out; |
3159 | } | |
3160 | cm_id_priv->id.state = IB_CM_IDLE; | |
34816ad9 | 3161 | ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
24be6e81 | 3162 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3163 | |
3164 | cm_format_sidr_rep_event(work); | |
3165 | cm_process_work(cm_id_priv, work); | |
3166 | return 0; | |
3167 | out: | |
3168 | cm_deref_id(cm_id_priv); | |
3169 | return -EINVAL; | |
3170 | } | |
3171 | ||
3172 | static void cm_process_send_error(struct ib_mad_send_buf *msg, | |
3173 | enum ib_wc_status wc_status) | |
3174 | { | |
3175 | struct cm_id_private *cm_id_priv; | |
3176 | struct ib_cm_event cm_event; | |
3177 | enum ib_cm_state state; | |
a977049d HR |
3178 | int ret; |
3179 | ||
3180 | memset(&cm_event, 0, sizeof cm_event); | |
3181 | cm_id_priv = msg->context[0]; | |
3182 | ||
3183 | /* Discard old sends or ones without a response. */ | |
24be6e81 | 3184 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3185 | state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
3186 | if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) | |
3187 | goto discard; | |
3188 | ||
3189 | switch (state) { | |
3190 | case IB_CM_REQ_SENT: | |
3191 | case IB_CM_MRA_REQ_RCVD: | |
3192 | cm_reset_to_idle(cm_id_priv); | |
3193 | cm_event.event = IB_CM_REQ_ERROR; | |
3194 | break; | |
3195 | case IB_CM_REP_SENT: | |
3196 | case IB_CM_MRA_REP_RCVD: | |
3197 | cm_reset_to_idle(cm_id_priv); | |
3198 | cm_event.event = IB_CM_REP_ERROR; | |
3199 | break; | |
3200 | case IB_CM_DREQ_SENT: | |
3201 | cm_enter_timewait(cm_id_priv); | |
3202 | cm_event.event = IB_CM_DREQ_ERROR; | |
3203 | break; | |
3204 | case IB_CM_SIDR_REQ_SENT: | |
3205 | cm_id_priv->id.state = IB_CM_IDLE; | |
3206 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
3207 | break; | |
3208 | default: | |
3209 | goto discard; | |
3210 | } | |
24be6e81 | 3211 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3212 | cm_event.param.send_status = wc_status; |
3213 | ||
3214 | /* No other events can occur on the cm_id at this point. */ | |
3215 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
3216 | cm_free_msg(msg); | |
3217 | if (ret) | |
3218 | ib_destroy_cm_id(&cm_id_priv->id); | |
3219 | return; | |
3220 | discard: | |
24be6e81 | 3221 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3222 | cm_free_msg(msg); |
3223 | } | |
3224 | ||
3225 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
3226 | struct ib_mad_send_wc *mad_send_wc) | |
3227 | { | |
34816ad9 | 3228 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
9af57b7a SH |
3229 | struct cm_port *port; |
3230 | u16 attr_index; | |
3231 | ||
3232 | port = mad_agent->context; | |
3233 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) | |
3234 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; | |
3235 | ||
3236 | /* | |
3237 | * If the send was in response to a received message (context[0] is not | |
3238 | * set to a cm_id), and is not a REJ, then it is a send that was | |
3239 | * manually retried. | |
3240 | */ | |
3241 | if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) | |
3242 | msg->retries = 1; | |
3243 | ||
3244 | atomic_long_add(1 + msg->retries, | |
3245 | &port->counter_group[CM_XMIT].counter[attr_index]); | |
3246 | if (msg->retries) | |
3247 | atomic_long_add(msg->retries, | |
3248 | &port->counter_group[CM_XMIT_RETRIES]. | |
3249 | counter[attr_index]); | |
a977049d HR |
3250 | |
3251 | switch (mad_send_wc->status) { | |
3252 | case IB_WC_SUCCESS: | |
3253 | case IB_WC_WR_FLUSH_ERR: | |
3254 | cm_free_msg(msg); | |
3255 | break; | |
3256 | default: | |
3257 | if (msg->context[0] && msg->context[1]) | |
3258 | cm_process_send_error(msg, mad_send_wc->status); | |
3259 | else | |
3260 | cm_free_msg(msg); | |
3261 | break; | |
3262 | } | |
3263 | } | |
3264 | ||
c4028958 | 3265 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3266 | { |
c4028958 | 3267 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3268 | int ret; |
3269 | ||
3270 | switch (work->cm_event.event) { | |
3271 | case IB_CM_REQ_RECEIVED: | |
3272 | ret = cm_req_handler(work); | |
3273 | break; | |
3274 | case IB_CM_MRA_RECEIVED: | |
3275 | ret = cm_mra_handler(work); | |
3276 | break; | |
3277 | case IB_CM_REJ_RECEIVED: | |
3278 | ret = cm_rej_handler(work); | |
3279 | break; | |
3280 | case IB_CM_REP_RECEIVED: | |
3281 | ret = cm_rep_handler(work); | |
3282 | break; | |
3283 | case IB_CM_RTU_RECEIVED: | |
3284 | ret = cm_rtu_handler(work); | |
3285 | break; | |
3286 | case IB_CM_USER_ESTABLISHED: | |
3287 | ret = cm_establish_handler(work); | |
3288 | break; | |
3289 | case IB_CM_DREQ_RECEIVED: | |
3290 | ret = cm_dreq_handler(work); | |
3291 | break; | |
3292 | case IB_CM_DREP_RECEIVED: | |
3293 | ret = cm_drep_handler(work); | |
3294 | break; | |
3295 | case IB_CM_SIDR_REQ_RECEIVED: | |
3296 | ret = cm_sidr_req_handler(work); | |
3297 | break; | |
3298 | case IB_CM_SIDR_REP_RECEIVED: | |
3299 | ret = cm_sidr_rep_handler(work); | |
3300 | break; | |
3301 | case IB_CM_LAP_RECEIVED: | |
3302 | ret = cm_lap_handler(work); | |
3303 | break; | |
3304 | case IB_CM_APR_RECEIVED: | |
3305 | ret = cm_apr_handler(work); | |
3306 | break; | |
3307 | case IB_CM_TIMEWAIT_EXIT: | |
3308 | ret = cm_timewait_handler(work); | |
3309 | break; | |
3310 | default: | |
3311 | ret = -EINVAL; | |
3312 | break; | |
3313 | } | |
3314 | if (ret) | |
3315 | cm_free_work(work); | |
3316 | } | |
3317 | ||
e1444b5a | 3318 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3319 | { |
3320 | struct cm_id_private *cm_id_priv; | |
3321 | struct cm_work *work; | |
3322 | unsigned long flags; | |
3323 | int ret = 0; | |
3324 | ||
3325 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3326 | if (!work) | |
3327 | return -ENOMEM; | |
3328 | ||
3329 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3330 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3331 | switch (cm_id->state) | |
3332 | { | |
3333 | case IB_CM_REP_SENT: | |
3334 | case IB_CM_MRA_REP_RCVD: | |
3335 | cm_id->state = IB_CM_ESTABLISHED; | |
3336 | break; | |
3337 | case IB_CM_ESTABLISHED: | |
3338 | ret = -EISCONN; | |
3339 | break; | |
3340 | default: | |
3341 | ret = -EINVAL; | |
3342 | break; | |
3343 | } | |
3344 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3345 | ||
3346 | if (ret) { | |
3347 | kfree(work); | |
3348 | goto out; | |
3349 | } | |
3350 | ||
3351 | /* | |
3352 | * The CM worker thread may try to destroy the cm_id before it | |
3353 | * can execute this work item. To prevent potential deadlock, | |
3354 | * we need to find the cm_id once we're in the context of the | |
3355 | * worker thread, rather than holding a reference on it. | |
3356 | */ | |
c4028958 | 3357 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3358 | work->local_id = cm_id->local_id; |
3359 | work->remote_id = cm_id->remote_id; | |
3360 | work->mad_recv_wc = NULL; | |
3361 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
c4028958 | 3362 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3363 | out: |
3364 | return ret; | |
3365 | } | |
e1444b5a SH |
3366 | |
3367 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3368 | { | |
3369 | struct cm_id_private *cm_id_priv; | |
3370 | unsigned long flags; | |
3371 | int ret = 0; | |
3372 | ||
3373 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3374 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3375 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3376 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3377 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3378 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3379 | cm_id_priv->av = cm_id_priv->alt_av; | |
3380 | } else | |
3381 | ret = -EINVAL; | |
3382 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3383 | ||
3384 | return ret; | |
3385 | } | |
3386 | ||
3387 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3388 | { | |
3389 | int ret; | |
3390 | ||
3391 | switch (event) { | |
3392 | case IB_EVENT_COMM_EST: | |
3393 | ret = cm_establish(cm_id); | |
3394 | break; | |
3395 | case IB_EVENT_PATH_MIG: | |
3396 | ret = cm_migrate(cm_id); | |
3397 | break; | |
3398 | default: | |
3399 | ret = -EINVAL; | |
3400 | } | |
3401 | return ret; | |
3402 | } | |
3403 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3404 | |
3405 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
3406 | struct ib_mad_recv_wc *mad_recv_wc) | |
3407 | { | |
9af57b7a | 3408 | struct cm_port *port = mad_agent->context; |
a977049d HR |
3409 | struct cm_work *work; |
3410 | enum ib_cm_event_type event; | |
9af57b7a | 3411 | u16 attr_id; |
a977049d HR |
3412 | int paths = 0; |
3413 | ||
3414 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
3415 | case CM_REQ_ATTR_ID: | |
3416 | paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> | |
3417 | alt_local_lid != 0); | |
3418 | event = IB_CM_REQ_RECEIVED; | |
3419 | break; | |
3420 | case CM_MRA_ATTR_ID: | |
3421 | event = IB_CM_MRA_RECEIVED; | |
3422 | break; | |
3423 | case CM_REJ_ATTR_ID: | |
3424 | event = IB_CM_REJ_RECEIVED; | |
3425 | break; | |
3426 | case CM_REP_ATTR_ID: | |
3427 | event = IB_CM_REP_RECEIVED; | |
3428 | break; | |
3429 | case CM_RTU_ATTR_ID: | |
3430 | event = IB_CM_RTU_RECEIVED; | |
3431 | break; | |
3432 | case CM_DREQ_ATTR_ID: | |
3433 | event = IB_CM_DREQ_RECEIVED; | |
3434 | break; | |
3435 | case CM_DREP_ATTR_ID: | |
3436 | event = IB_CM_DREP_RECEIVED; | |
3437 | break; | |
3438 | case CM_SIDR_REQ_ATTR_ID: | |
3439 | event = IB_CM_SIDR_REQ_RECEIVED; | |
3440 | break; | |
3441 | case CM_SIDR_REP_ATTR_ID: | |
3442 | event = IB_CM_SIDR_REP_RECEIVED; | |
3443 | break; | |
3444 | case CM_LAP_ATTR_ID: | |
3445 | paths = 1; | |
3446 | event = IB_CM_LAP_RECEIVED; | |
3447 | break; | |
3448 | case CM_APR_ATTR_ID: | |
3449 | event = IB_CM_APR_RECEIVED; | |
3450 | break; | |
3451 | default: | |
3452 | ib_free_recv_mad(mad_recv_wc); | |
3453 | return; | |
3454 | } | |
3455 | ||
9af57b7a SH |
3456 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
3457 | atomic_long_inc(&port->counter_group[CM_RECV]. | |
3458 | counter[attr_id - CM_ATTR_ID_OFFSET]); | |
3459 | ||
a977049d HR |
3460 | work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
3461 | GFP_KERNEL); | |
3462 | if (!work) { | |
3463 | ib_free_recv_mad(mad_recv_wc); | |
3464 | return; | |
3465 | } | |
3466 | ||
c4028958 | 3467 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3468 | work->cm_event.event = event; |
3469 | work->mad_recv_wc = mad_recv_wc; | |
9af57b7a | 3470 | work->port = port; |
c4028958 | 3471 | queue_delayed_work(cm.wq, &work->work, 0); |
a977049d HR |
3472 | } |
3473 | ||
3474 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
3475 | struct ib_qp_attr *qp_attr, | |
3476 | int *qp_attr_mask) | |
3477 | { | |
3478 | unsigned long flags; | |
3479 | int ret; | |
3480 | ||
3481 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3482 | switch (cm_id_priv->id.state) { | |
3483 | case IB_CM_REQ_SENT: | |
3484 | case IB_CM_MRA_REQ_RCVD: | |
3485 | case IB_CM_REQ_RCVD: | |
3486 | case IB_CM_MRA_REQ_SENT: | |
3487 | case IB_CM_REP_RCVD: | |
3488 | case IB_CM_MRA_REP_SENT: | |
3489 | case IB_CM_REP_SENT: | |
3490 | case IB_CM_MRA_REP_RCVD: | |
3491 | case IB_CM_ESTABLISHED: | |
3492 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
3493 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 3494 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 3495 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
3496 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
3497 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d HR |
3498 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
3499 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
3500 | ret = 0; | |
3501 | break; | |
3502 | default: | |
3503 | ret = -EINVAL; | |
3504 | break; | |
3505 | } | |
3506 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3507 | return ret; | |
3508 | } | |
3509 | ||
3510 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
3511 | struct ib_qp_attr *qp_attr, | |
3512 | int *qp_attr_mask) | |
3513 | { | |
3514 | unsigned long flags; | |
3515 | int ret; | |
3516 | ||
3517 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3518 | switch (cm_id_priv->id.state) { | |
3519 | case IB_CM_REQ_RCVD: | |
3520 | case IB_CM_MRA_REQ_SENT: | |
3521 | case IB_CM_REP_RCVD: | |
3522 | case IB_CM_MRA_REP_SENT: | |
3523 | case IB_CM_REP_SENT: | |
3524 | case IB_CM_MRA_REP_RCVD: | |
3525 | case IB_CM_ESTABLISHED: | |
3526 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 3527 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d | 3528 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
dd5f03be MB |
3529 | if (!cm_id_priv->av.valid) |
3530 | return -EINVAL; | |
3531 | if (cm_id_priv->av.ah_attr.vlan_id != 0xffff) { | |
3532 | qp_attr->vlan_id = cm_id_priv->av.ah_attr.vlan_id; | |
3533 | *qp_attr_mask |= IB_QP_VID; | |
3534 | } | |
3535 | if (!is_zero_ether_addr(cm_id_priv->av.smac)) { | |
3536 | memcpy(qp_attr->smac, cm_id_priv->av.smac, | |
3537 | sizeof(qp_attr->smac)); | |
3538 | *qp_attr_mask |= IB_QP_SMAC; | |
3539 | } | |
3540 | if (cm_id_priv->alt_av.valid) { | |
3541 | if (cm_id_priv->alt_av.ah_attr.vlan_id != 0xffff) { | |
3542 | qp_attr->alt_vlan_id = | |
3543 | cm_id_priv->alt_av.ah_attr.vlan_id; | |
3544 | *qp_attr_mask |= IB_QP_ALT_VID; | |
3545 | } | |
3546 | if (!is_zero_ether_addr(cm_id_priv->alt_av.smac)) { | |
3547 | memcpy(qp_attr->alt_smac, | |
3548 | cm_id_priv->alt_av.smac, | |
3549 | sizeof(qp_attr->alt_smac)); | |
3550 | *qp_attr_mask |= IB_QP_ALT_SMAC; | |
3551 | } | |
3552 | } | |
a977049d HR |
3553 | qp_attr->path_mtu = cm_id_priv->path_mtu; |
3554 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
3555 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
d26a360b SH |
3556 | if (cm_id_priv->qp_type == IB_QPT_RC || |
3557 | cm_id_priv->qp_type == IB_QPT_XRC_TGT) { | |
ae7971a7 SH |
3558 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
3559 | IB_QP_MIN_RNR_TIMER; | |
3560 | qp_attr->max_dest_rd_atomic = | |
3561 | cm_id_priv->responder_resources; | |
3562 | qp_attr->min_rnr_timer = 0; | |
3563 | } | |
a977049d HR |
3564 | if (cm_id_priv->alt_av.ah_attr.dlid) { |
3565 | *qp_attr_mask |= IB_QP_ALT_PATH; | |
0d8fdfd7 | 3566 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 3567 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 3568 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
3569 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
3570 | } | |
3571 | ret = 0; | |
3572 | break; | |
3573 | default: | |
3574 | ret = -EINVAL; | |
3575 | break; | |
3576 | } | |
3577 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3578 | return ret; | |
3579 | } | |
3580 | ||
3581 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
3582 | struct ib_qp_attr *qp_attr, | |
3583 | int *qp_attr_mask) | |
3584 | { | |
3585 | unsigned long flags; | |
3586 | int ret; | |
3587 | ||
3588 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3589 | switch (cm_id_priv->id.state) { | |
0fe313b0 SH |
3590 | /* Allow transition to RTS before sending REP */ |
3591 | case IB_CM_REQ_RCVD: | |
3592 | case IB_CM_MRA_REQ_SENT: | |
3593 | ||
a977049d HR |
3594 | case IB_CM_REP_RCVD: |
3595 | case IB_CM_MRA_REP_SENT: | |
3596 | case IB_CM_REP_SENT: | |
3597 | case IB_CM_MRA_REP_RCVD: | |
3598 | case IB_CM_ESTABLISHED: | |
e1444b5a SH |
3599 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
3600 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
3601 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
d26a360b SH |
3602 | switch (cm_id_priv->qp_type) { |
3603 | case IB_QPT_RC: | |
3604 | case IB_QPT_XRC_INI: | |
3605 | *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY | | |
e1444b5a | 3606 | IB_QP_MAX_QP_RD_ATOMIC; |
e1444b5a SH |
3607 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
3608 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
d26a360b SH |
3609 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; |
3610 | /* fall through */ | |
3611 | case IB_QPT_XRC_TGT: | |
3612 | *qp_attr_mask |= IB_QP_TIMEOUT; | |
3613 | qp_attr->timeout = cm_id_priv->av.timeout; | |
3614 | break; | |
3615 | default: | |
3616 | break; | |
e1444b5a SH |
3617 | } |
3618 | if (cm_id_priv->alt_av.ah_attr.dlid) { | |
3619 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; | |
3620 | qp_attr->path_mig_state = IB_MIG_REARM; | |
3621 | } | |
3622 | } else { | |
3623 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
3624 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; | |
3625 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; | |
1d846126 | 3626 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 3627 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
3628 | qp_attr->path_mig_state = IB_MIG_REARM; |
3629 | } | |
3630 | ret = 0; | |
3631 | break; | |
3632 | default: | |
3633 | ret = -EINVAL; | |
3634 | break; | |
3635 | } | |
3636 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3637 | return ret; | |
3638 | } | |
3639 | ||
3640 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
3641 | struct ib_qp_attr *qp_attr, | |
3642 | int *qp_attr_mask) | |
3643 | { | |
3644 | struct cm_id_private *cm_id_priv; | |
3645 | int ret; | |
3646 | ||
3647 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3648 | switch (qp_attr->qp_state) { | |
3649 | case IB_QPS_INIT: | |
3650 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3651 | break; | |
3652 | case IB_QPS_RTR: | |
3653 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3654 | break; | |
3655 | case IB_QPS_RTS: | |
3656 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
3657 | break; | |
3658 | default: | |
3659 | ret = -EINVAL; | |
3660 | break; | |
3661 | } | |
3662 | return ret; | |
3663 | } | |
3664 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
3665 | ||
454a01e7 | 3666 | static void cm_get_ack_delay(struct cm_device *cm_dev) |
1d846126 SH |
3667 | { |
3668 | struct ib_device_attr attr; | |
3669 | ||
d4c4196f | 3670 | if (ib_query_device(cm_dev->ib_device, &attr)) |
1d846126 SH |
3671 | cm_dev->ack_delay = 0; /* acks will rely on packet life time */ |
3672 | else | |
3673 | cm_dev->ack_delay = attr.local_ca_ack_delay; | |
3674 | } | |
3675 | ||
9af57b7a SH |
3676 | static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, |
3677 | char *buf) | |
3678 | { | |
3679 | struct cm_counter_group *group; | |
3680 | struct cm_counter_attribute *cm_attr; | |
3681 | ||
3682 | group = container_of(obj, struct cm_counter_group, obj); | |
3683 | cm_attr = container_of(attr, struct cm_counter_attribute, attr); | |
3684 | ||
3685 | return sprintf(buf, "%ld\n", | |
3686 | atomic_long_read(&group->counter[cm_attr->index])); | |
3687 | } | |
3688 | ||
52cf25d0 | 3689 | static const struct sysfs_ops cm_counter_ops = { |
9af57b7a SH |
3690 | .show = cm_show_counter |
3691 | }; | |
3692 | ||
3693 | static struct kobj_type cm_counter_obj_type = { | |
3694 | .sysfs_ops = &cm_counter_ops, | |
3695 | .default_attrs = cm_counter_default_attrs | |
3696 | }; | |
3697 | ||
3698 | static void cm_release_port_obj(struct kobject *obj) | |
3699 | { | |
3700 | struct cm_port *cm_port; | |
3701 | ||
9af57b7a SH |
3702 | cm_port = container_of(obj, struct cm_port, port_obj); |
3703 | kfree(cm_port); | |
3704 | } | |
3705 | ||
3706 | static struct kobj_type cm_port_obj_type = { | |
3707 | .release = cm_release_port_obj | |
3708 | }; | |
3709 | ||
2c9ede55 | 3710 | static char *cm_devnode(struct device *dev, umode_t *mode) |
c3af0980 | 3711 | { |
b2bc4782 GR |
3712 | if (mode) |
3713 | *mode = 0666; | |
c3af0980 RD |
3714 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
3715 | } | |
3716 | ||
9af57b7a | 3717 | struct class cm_class = { |
c3af0980 | 3718 | .owner = THIS_MODULE, |
9af57b7a | 3719 | .name = "infiniband_cm", |
c3af0980 | 3720 | .devnode = cm_devnode, |
9af57b7a SH |
3721 | }; |
3722 | EXPORT_SYMBOL(cm_class); | |
3723 | ||
9af57b7a SH |
3724 | static int cm_create_port_fs(struct cm_port *port) |
3725 | { | |
3726 | int i, ret; | |
3727 | ||
3728 | ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, | |
110cf374 | 3729 | &port->cm_dev->device->kobj, |
9af57b7a SH |
3730 | "%d", port->port_num); |
3731 | if (ret) { | |
3732 | kfree(port); | |
3733 | return ret; | |
3734 | } | |
3735 | ||
3736 | for (i = 0; i < CM_COUNTER_GROUPS; i++) { | |
3737 | ret = kobject_init_and_add(&port->counter_group[i].obj, | |
3738 | &cm_counter_obj_type, | |
7c7a9bcc | 3739 | &port->port_obj, |
9af57b7a SH |
3740 | "%s", counter_group_names[i]); |
3741 | if (ret) | |
3742 | goto error; | |
3743 | } | |
3744 | ||
3745 | return 0; | |
3746 | ||
3747 | error: | |
3748 | while (i--) | |
7c7a9bcc RD |
3749 | kobject_put(&port->counter_group[i].obj); |
3750 | kobject_put(&port->port_obj); | |
9af57b7a SH |
3751 | return ret; |
3752 | ||
3753 | } | |
3754 | ||
3755 | static void cm_remove_port_fs(struct cm_port *port) | |
3756 | { | |
3757 | int i; | |
3758 | ||
3759 | for (i = 0; i < CM_COUNTER_GROUPS; i++) | |
7c7a9bcc | 3760 | kobject_put(&port->counter_group[i].obj); |
9af57b7a | 3761 | |
7c7a9bcc | 3762 | kobject_put(&port->port_obj); |
9af57b7a SH |
3763 | } |
3764 | ||
d4c4196f | 3765 | static void cm_add_one(struct ib_device *ib_device) |
a977049d HR |
3766 | { |
3767 | struct cm_device *cm_dev; | |
3768 | struct cm_port *port; | |
3769 | struct ib_mad_reg_req reg_req = { | |
3770 | .mgmt_class = IB_MGMT_CLASS_CM, | |
3771 | .mgmt_class_version = IB_CM_CLASS_VERSION | |
3772 | }; | |
3773 | struct ib_port_modify port_modify = { | |
3774 | .set_port_cap_mask = IB_PORT_CM_SUP | |
3775 | }; | |
3776 | unsigned long flags; | |
3777 | int ret; | |
3778 | u8 i; | |
3779 | ||
d4c4196f | 3780 | if (rdma_node_get_transport(ib_device->node_type) != RDMA_TRANSPORT_IB) |
07ebafba TT |
3781 | return; |
3782 | ||
9af57b7a | 3783 | cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * |
d4c4196f | 3784 | ib_device->phys_port_cnt, GFP_KERNEL); |
a977049d HR |
3785 | if (!cm_dev) |
3786 | return; | |
3787 | ||
d4c4196f | 3788 | cm_dev->ib_device = ib_device; |
1d846126 | 3789 | cm_get_ack_delay(cm_dev); |
a977049d | 3790 | |
91bd418f GKH |
3791 | cm_dev->device = device_create(&cm_class, &ib_device->dev, |
3792 | MKDEV(0, 0), NULL, | |
3793 | "%s", ib_device->name); | |
3e340c05 | 3794 | if (IS_ERR(cm_dev->device)) { |
9af57b7a SH |
3795 | kfree(cm_dev); |
3796 | return; | |
3797 | } | |
3798 | ||
a977049d | 3799 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
d4c4196f | 3800 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
9af57b7a SH |
3801 | port = kzalloc(sizeof *port, GFP_KERNEL); |
3802 | if (!port) | |
3803 | goto error1; | |
3804 | ||
3805 | cm_dev->port[i-1] = port; | |
a977049d HR |
3806 | port->cm_dev = cm_dev; |
3807 | port->port_num = i; | |
9af57b7a SH |
3808 | |
3809 | ret = cm_create_port_fs(port); | |
3810 | if (ret) | |
3811 | goto error1; | |
3812 | ||
d4c4196f | 3813 | port->mad_agent = ib_register_mad_agent(ib_device, i, |
a977049d HR |
3814 | IB_QPT_GSI, |
3815 | ®_req, | |
3816 | 0, | |
3817 | cm_send_handler, | |
3818 | cm_recv_handler, | |
3819 | port); | |
3820 | if (IS_ERR(port->mad_agent)) | |
9af57b7a | 3821 | goto error2; |
a977049d | 3822 | |
d4c4196f | 3823 | ret = ib_modify_port(ib_device, i, 0, &port_modify); |
a977049d | 3824 | if (ret) |
9af57b7a | 3825 | goto error3; |
a977049d | 3826 | } |
d4c4196f | 3827 | ib_set_client_data(ib_device, &cm_client, cm_dev); |
a977049d HR |
3828 | |
3829 | write_lock_irqsave(&cm.device_lock, flags); | |
3830 | list_add_tail(&cm_dev->list, &cm.device_list); | |
3831 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3832 | return; | |
3833 | ||
9af57b7a | 3834 | error3: |
cf311cd4 | 3835 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a SH |
3836 | error2: |
3837 | cm_remove_port_fs(port); | |
cf311cd4 | 3838 | error1: |
a977049d HR |
3839 | port_modify.set_port_cap_mask = 0; |
3840 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
3841 | while (--i) { | |
9af57b7a | 3842 | port = cm_dev->port[i-1]; |
d4c4196f | 3843 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3844 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a | 3845 | cm_remove_port_fs(port); |
a977049d | 3846 | } |
110cf374 | 3847 | device_unregister(cm_dev->device); |
a7e80ce2 | 3848 | kfree(cm_dev); |
a977049d HR |
3849 | } |
3850 | ||
d4c4196f | 3851 | static void cm_remove_one(struct ib_device *ib_device) |
a977049d HR |
3852 | { |
3853 | struct cm_device *cm_dev; | |
3854 | struct cm_port *port; | |
3855 | struct ib_port_modify port_modify = { | |
3856 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
3857 | }; | |
3858 | unsigned long flags; | |
3859 | int i; | |
3860 | ||
d4c4196f | 3861 | cm_dev = ib_get_client_data(ib_device, &cm_client); |
a977049d HR |
3862 | if (!cm_dev) |
3863 | return; | |
3864 | ||
3865 | write_lock_irqsave(&cm.device_lock, flags); | |
3866 | list_del(&cm_dev->list); | |
3867 | write_unlock_irqrestore(&cm.device_lock, flags); | |
3868 | ||
d4c4196f | 3869 | for (i = 1; i <= ib_device->phys_port_cnt; i++) { |
9af57b7a | 3870 | port = cm_dev->port[i-1]; |
d4c4196f | 3871 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 3872 | ib_unregister_mad_agent(port->mad_agent); |
84ba284c | 3873 | flush_workqueue(cm.wq); |
9af57b7a | 3874 | cm_remove_port_fs(port); |
a977049d | 3875 | } |
110cf374 | 3876 | device_unregister(cm_dev->device); |
a7e80ce2 | 3877 | kfree(cm_dev); |
a977049d HR |
3878 | } |
3879 | ||
3880 | static int __init ib_cm_init(void) | |
3881 | { | |
3882 | int ret; | |
3883 | ||
3884 | memset(&cm, 0, sizeof cm); | |
3885 | INIT_LIST_HEAD(&cm.device_list); | |
3886 | rwlock_init(&cm.device_lock); | |
3887 | spin_lock_init(&cm.lock); | |
3888 | cm.listen_service_table = RB_ROOT; | |
9c3da099 | 3889 | cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
a977049d HR |
3890 | cm.remote_id_table = RB_ROOT; |
3891 | cm.remote_qp_table = RB_ROOT; | |
3892 | cm.remote_sidr_table = RB_ROOT; | |
3893 | idr_init(&cm.local_id_table); | |
f06d2653 | 3894 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
8575329d | 3895 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d | 3896 | |
9af57b7a | 3897 | ret = class_register(&cm_class); |
87d4abda DB |
3898 | if (ret) { |
3899 | ret = -ENOMEM; | |
3900 | goto error1; | |
3901 | } | |
a977049d | 3902 | |
9af57b7a SH |
3903 | cm.wq = create_workqueue("ib_cm"); |
3904 | if (!cm.wq) { | |
3905 | ret = -ENOMEM; | |
87d4abda | 3906 | goto error2; |
9af57b7a SH |
3907 | } |
3908 | ||
a977049d HR |
3909 | ret = ib_register_client(&cm_client); |
3910 | if (ret) | |
87d4abda | 3911 | goto error3; |
a977049d HR |
3912 | |
3913 | return 0; | |
87d4abda | 3914 | error3: |
a977049d | 3915 | destroy_workqueue(cm.wq); |
87d4abda | 3916 | error2: |
9af57b7a | 3917 | class_unregister(&cm_class); |
87d4abda DB |
3918 | error1: |
3919 | idr_destroy(&cm.local_id_table); | |
a977049d HR |
3920 | return ret; |
3921 | } | |
3922 | ||
3923 | static void __exit ib_cm_cleanup(void) | |
3924 | { | |
8575329d SH |
3925 | struct cm_timewait_info *timewait_info, *tmp; |
3926 | ||
3927 | spin_lock_irq(&cm.lock); | |
3928 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
3929 | cancel_delayed_work(&timewait_info->work.work); | |
3930 | spin_unlock_irq(&cm.lock); | |
3931 | ||
84ba284c | 3932 | ib_unregister_client(&cm_client); |
a977049d | 3933 | destroy_workqueue(cm.wq); |
8575329d SH |
3934 | |
3935 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
3936 | list_del(&timewait_info->list); | |
3937 | kfree(timewait_info); | |
3938 | } | |
3939 | ||
9af57b7a | 3940 | class_unregister(&cm_class); |
5d7edb3c | 3941 | idr_destroy(&cm.local_id_table); |
a977049d HR |
3942 | } |
3943 | ||
3944 | module_init(ib_cm_init); | |
3945 | module_exit(ib_cm_cleanup); | |
3946 |