1/*
2 * Copyright (c) 2012 Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#include <rdma/ib_mad.h>
34
35#include <linux/mlx4/cmd.h>
36#include <linux/rbtree.h>
37#include <linux/idr.h>
38#include <rdma/ib_cm.h>
39
40#include "mlx4_ib.h"
41
42#define CM_CLEANUP_CACHE_TIMEOUT (30 * HZ)
43
44struct id_map_entry {
45 struct rb_node node;
46
47 u32 sl_cm_id;
48 u32 pv_cm_id;
49 int slave_id;
50 int scheduled_delete;
51 struct mlx4_ib_dev *dev;
52
53 struct list_head list;
54 struct delayed_work timeout;
55};
56
57struct rej_tmout_entry {
58 int slave;
59 u32 rem_pv_cm_id;
60 struct delayed_work timeout;
61 struct xarray *xa_rej_tmout;
62};
63
64struct cm_generic_msg {
65 struct ib_mad_hdr hdr;
66
67 __be32 local_comm_id;
68 __be32 remote_comm_id;
69 unsigned char unused[2];
70 __be16 rej_reason;
71};
72
73struct cm_sidr_generic_msg {
74 struct ib_mad_hdr hdr;
75 __be32 request_id;
76};
77
78struct cm_req_msg {
79 unsigned char unused[0x60];
80 union ib_gid primary_path_sgid;
81};
82
83static struct workqueue_struct *cm_wq;
84
85static void set_local_comm_id(struct ib_mad *mad, u32 cm_id)
86{
87 if (mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
88 struct cm_sidr_generic_msg *msg =
89 (struct cm_sidr_generic_msg *)mad;
90 msg->request_id = cpu_to_be32(cm_id);
91 } else if (mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
92 pr_err("trying to set local_comm_id in SIDR_REP\n");
93 return;
94 } else {
95 struct cm_generic_msg *msg = (struct cm_generic_msg *)mad;
96 msg->local_comm_id = cpu_to_be32(cm_id);
97 }
98}
99
100static u32 get_local_comm_id(struct ib_mad *mad)
101{
102 if (mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
103 struct cm_sidr_generic_msg *msg =
104 (struct cm_sidr_generic_msg *)mad;
105 return be32_to_cpu(msg->request_id);
106 } else if (mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
107 pr_err("trying to set local_comm_id in SIDR_REP\n");
108 return -1;
109 } else {
110 struct cm_generic_msg *msg = (struct cm_generic_msg *)mad;
111 return be32_to_cpu(msg->local_comm_id);
112 }
113}
114
115static void set_remote_comm_id(struct ib_mad *mad, u32 cm_id)
116{
117 if (mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
118 struct cm_sidr_generic_msg *msg =
119 (struct cm_sidr_generic_msg *)mad;
120 msg->request_id = cpu_to_be32(cm_id);
121 } else if (mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
122 pr_err("trying to set remote_comm_id in SIDR_REQ\n");
123 return;
124 } else {
125 struct cm_generic_msg *msg = (struct cm_generic_msg *)mad;
126 msg->remote_comm_id = cpu_to_be32(cm_id);
127 }
128}
129
130static u32 get_remote_comm_id(struct ib_mad *mad)
131{
132 if (mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
133 struct cm_sidr_generic_msg *msg =
134 (struct cm_sidr_generic_msg *)mad;
135 return be32_to_cpu(msg->request_id);
136 } else if (mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
137 pr_err("trying to set remote_comm_id in SIDR_REQ\n");
138 return -1;
139 } else {
140 struct cm_generic_msg *msg = (struct cm_generic_msg *)mad;
141 return be32_to_cpu(msg->remote_comm_id);
142 }
143}
144
145static union ib_gid gid_from_req_msg(struct ib_device *ibdev, struct ib_mad *mad)
146{
147 struct cm_req_msg *msg = (struct cm_req_msg *)mad;
148
149 return msg->primary_path_sgid;
150}
151
152/* Lock should be taken before called */
153static struct id_map_entry *
154id_map_find_by_sl_id(struct ib_device *ibdev, u32 slave_id, u32 sl_cm_id)
155{
156 struct rb_root *sl_id_map = &to_mdev(ibdev)->sriov.sl_id_map;
157 struct rb_node *node = sl_id_map->rb_node;
158
159 while (node) {
160 struct id_map_entry *id_map_entry =
161 rb_entry(node, struct id_map_entry, node);
162
163 if (id_map_entry->sl_cm_id > sl_cm_id)
164 node = node->rb_left;
165 else if (id_map_entry->sl_cm_id < sl_cm_id)
166 node = node->rb_right;
167 else if (id_map_entry->slave_id > slave_id)
168 node = node->rb_left;
169 else if (id_map_entry->slave_id < slave_id)
170 node = node->rb_right;
171 else
172 return id_map_entry;
173 }
174 return NULL;
175}
176
177static void id_map_ent_timeout(struct work_struct *work)
178{
179 struct delayed_work *delay = to_delayed_work(work);
180 struct id_map_entry *ent = container_of(delay, struct id_map_entry, timeout);
181 struct id_map_entry *found_ent;
182 struct mlx4_ib_dev *dev = ent->dev;
183 struct mlx4_ib_sriov *sriov = &dev->sriov;
184 struct rb_root *sl_id_map = &sriov->sl_id_map;
185
186 spin_lock(lock: &sriov->id_map_lock);
187 if (!xa_erase(&sriov->pv_id_table, index: ent->pv_cm_id))
188 goto out;
189 found_ent = id_map_find_by_sl_id(ibdev: &dev->ib_dev, slave_id: ent->slave_id, sl_cm_id: ent->sl_cm_id);
190 if (found_ent && found_ent == ent)
191 rb_erase(&found_ent->node, sl_id_map);
192
193out:
194 list_del(entry: &ent->list);
195 spin_unlock(lock: &sriov->id_map_lock);
196 kfree(objp: ent);
197}
198
199static void sl_id_map_add(struct ib_device *ibdev, struct id_map_entry *new)
200{
201 struct rb_root *sl_id_map = &to_mdev(ibdev)->sriov.sl_id_map;
202 struct rb_node **link = &sl_id_map->rb_node, *parent = NULL;
203 struct id_map_entry *ent;
204 int slave_id = new->slave_id;
205 int sl_cm_id = new->sl_cm_id;
206
207 ent = id_map_find_by_sl_id(ibdev, slave_id, sl_cm_id);
208 if (ent) {
209 pr_debug("overriding existing sl_id_map entry (cm_id = %x)\n",
210 sl_cm_id);
211
212 rb_replace_node(victim: &ent->node, new: &new->node, root: sl_id_map);
213 return;
214 }
215
216 /* Go to the bottom of the tree */
217 while (*link) {
218 parent = *link;
219 ent = rb_entry(parent, struct id_map_entry, node);
220
221 if (ent->sl_cm_id > sl_cm_id || (ent->sl_cm_id == sl_cm_id && ent->slave_id > slave_id))
222 link = &(*link)->rb_left;
223 else
224 link = &(*link)->rb_right;
225 }
226
227 rb_link_node(node: &new->node, parent, rb_link: link);
228 rb_insert_color(&new->node, sl_id_map);
229}
230
231static struct id_map_entry *
232id_map_alloc(struct ib_device *ibdev, int slave_id, u32 sl_cm_id)
233{
234 int ret;
235 struct id_map_entry *ent;
236 struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
237
238 ent = kmalloc(sizeof (struct id_map_entry), GFP_KERNEL);
239 if (!ent)
240 return ERR_PTR(error: -ENOMEM);
241
242 ent->sl_cm_id = sl_cm_id;
243 ent->slave_id = slave_id;
244 ent->scheduled_delete = 0;
245 ent->dev = to_mdev(ibdev);
246 INIT_DELAYED_WORK(&ent->timeout, id_map_ent_timeout);
247
248 ret = xa_alloc_cyclic(xa: &sriov->pv_id_table, id: &ent->pv_cm_id, entry: ent,
249 xa_limit_32b, next: &sriov->pv_id_next, GFP_KERNEL);
250 if (ret >= 0) {
251 spin_lock(lock: &sriov->id_map_lock);
252 sl_id_map_add(ibdev, new: ent);
253 list_add_tail(new: &ent->list, head: &sriov->cm_list);
254 spin_unlock(lock: &sriov->id_map_lock);
255 return ent;
256 }
257
258 /*error flow*/
259 kfree(objp: ent);
260 mlx4_ib_warn(ibdev, "Allocation failed (err:0x%x)\n", ret);
261 return ERR_PTR(error: -ENOMEM);
262}
263
264static struct id_map_entry *
265id_map_get(struct ib_device *ibdev, int *pv_cm_id, int slave_id, int sl_cm_id)
266{
267 struct id_map_entry *ent;
268 struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
269
270 spin_lock(lock: &sriov->id_map_lock);
271 if (*pv_cm_id == -1) {
272 ent = id_map_find_by_sl_id(ibdev, slave_id, sl_cm_id);
273 if (ent)
274 *pv_cm_id = (int) ent->pv_cm_id;
275 } else
276 ent = xa_load(&sriov->pv_id_table, index: *pv_cm_id);
277 spin_unlock(lock: &sriov->id_map_lock);
278
279 return ent;
280}
281
282static void schedule_delayed(struct ib_device *ibdev, struct id_map_entry *id)
283{
284 struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
285 unsigned long flags;
286
287 spin_lock(lock: &sriov->id_map_lock);
288 spin_lock_irqsave(&sriov->going_down_lock, flags);
289 /*make sure that there is no schedule inside the scheduled work.*/
290 if (!sriov->is_going_down && !id->scheduled_delete) {
291 id->scheduled_delete = 1;
292 queue_delayed_work(wq: cm_wq, dwork: &id->timeout, CM_CLEANUP_CACHE_TIMEOUT);
293 } else if (id->scheduled_delete) {
294 /* Adjust timeout if already scheduled */
295 mod_delayed_work(wq: cm_wq, dwork: &id->timeout, CM_CLEANUP_CACHE_TIMEOUT);
296 }
297 spin_unlock_irqrestore(lock: &sriov->going_down_lock, flags);
298 spin_unlock(lock: &sriov->id_map_lock);
299}
300
301#define REJ_REASON(m) be16_to_cpu(((struct cm_generic_msg *)(m))->rej_reason)
302int mlx4_ib_multiplex_cm_handler(struct ib_device *ibdev, int port, int slave_id,
303 struct ib_mad *mad)
304{
305 struct id_map_entry *id;
306 u32 sl_cm_id;
307 int pv_cm_id = -1;
308
309 if (mad->mad_hdr.attr_id == CM_REQ_ATTR_ID ||
310 mad->mad_hdr.attr_id == CM_REP_ATTR_ID ||
311 mad->mad_hdr.attr_id == CM_MRA_ATTR_ID ||
312 mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID ||
313 (mad->mad_hdr.attr_id == CM_REJ_ATTR_ID && REJ_REASON(mad) == IB_CM_REJ_TIMEOUT)) {
314 sl_cm_id = get_local_comm_id(mad);
315 id = id_map_get(ibdev, pv_cm_id: &pv_cm_id, slave_id, sl_cm_id);
316 if (id)
317 goto cont;
318 id = id_map_alloc(ibdev, slave_id, sl_cm_id);
319 if (IS_ERR(ptr: id)) {
320 mlx4_ib_warn(ibdev, "%s: id{slave: %d, sl_cm_id: 0x%x} Failed to id_map_alloc\n",
321 __func__, slave_id, sl_cm_id);
322 return PTR_ERR(ptr: id);
323 }
324 } else if (mad->mad_hdr.attr_id == CM_REJ_ATTR_ID ||
325 mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
326 return 0;
327 } else {
328 sl_cm_id = get_local_comm_id(mad);
329 id = id_map_get(ibdev, pv_cm_id: &pv_cm_id, slave_id, sl_cm_id);
330 }
331
332 if (!id) {
333 pr_debug("id{slave: %d, sl_cm_id: 0x%x} is NULL! attr_id: 0x%x\n",
334 slave_id, sl_cm_id, be16_to_cpu(mad->mad_hdr.attr_id));
335 return -EINVAL;
336 }
337
338cont:
339 set_local_comm_id(mad, cm_id: id->pv_cm_id);
340
341 if (mad->mad_hdr.attr_id == CM_DREQ_ATTR_ID)
342 schedule_delayed(ibdev, id);
343 return 0;
344}
345
346static void rej_tmout_timeout(struct work_struct *work)
347{
348 struct delayed_work *delay = to_delayed_work(work);
349 struct rej_tmout_entry *item = container_of(delay, struct rej_tmout_entry, timeout);
350 struct rej_tmout_entry *deleted;
351
352 deleted = xa_cmpxchg(xa: item->xa_rej_tmout, index: item->rem_pv_cm_id, old: item, NULL, gfp: 0);
353
354 if (deleted != item)
355 pr_debug("deleted(%p) != item(%p)\n", deleted, item);
356
357 kfree(objp: item);
358}
359
360static int alloc_rej_tmout(struct mlx4_ib_sriov *sriov, u32 rem_pv_cm_id, int slave)
361{
362 struct rej_tmout_entry *item;
363 struct rej_tmout_entry *old;
364 int ret = 0;
365
366 xa_lock(&sriov->xa_rej_tmout);
367 item = xa_load(&sriov->xa_rej_tmout, index: (unsigned long)rem_pv_cm_id);
368
369 if (item) {
370 if (xa_err(entry: item))
371 ret = xa_err(entry: item);
372 else
373 /* If a retry, adjust delayed work */
374 mod_delayed_work(wq: cm_wq, dwork: &item->timeout, CM_CLEANUP_CACHE_TIMEOUT);
375 goto err_or_exists;
376 }
377 xa_unlock(&sriov->xa_rej_tmout);
378
379 item = kmalloc(sizeof(*item), GFP_KERNEL);
380 if (!item)
381 return -ENOMEM;
382
383 INIT_DELAYED_WORK(&item->timeout, rej_tmout_timeout);
384 item->slave = slave;
385 item->rem_pv_cm_id = rem_pv_cm_id;
386 item->xa_rej_tmout = &sriov->xa_rej_tmout;
387
388 old = xa_cmpxchg(xa: &sriov->xa_rej_tmout, index: (unsigned long)rem_pv_cm_id, NULL, entry: item, GFP_KERNEL);
389 if (old) {
390 pr_debug(
391 "Non-null old entry (%p) or error (%d) when inserting\n",
392 old, xa_err(old));
393 kfree(objp: item);
394 return xa_err(entry: old);
395 }
396
397 queue_delayed_work(wq: cm_wq, dwork: &item->timeout, CM_CLEANUP_CACHE_TIMEOUT);
398
399 return 0;
400
401err_or_exists:
402 xa_unlock(&sriov->xa_rej_tmout);
403 return ret;
404}
405
406static int lookup_rej_tmout_slave(struct mlx4_ib_sriov *sriov, u32 rem_pv_cm_id)
407{
408 struct rej_tmout_entry *item;
409 int slave;
410
411 xa_lock(&sriov->xa_rej_tmout);
412 item = xa_load(&sriov->xa_rej_tmout, index: (unsigned long)rem_pv_cm_id);
413
414 if (!item || xa_err(entry: item)) {
415 pr_debug("Could not find slave. rem_pv_cm_id 0x%x error: %d\n",
416 rem_pv_cm_id, xa_err(item));
417 slave = !item ? -ENOENT : xa_err(entry: item);
418 } else {
419 slave = item->slave;
420 }
421 xa_unlock(&sriov->xa_rej_tmout);
422
423 return slave;
424}
425
426int mlx4_ib_demux_cm_handler(struct ib_device *ibdev, int port, int *slave,
427 struct ib_mad *mad)
428{
429 struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
430 u32 rem_pv_cm_id = get_local_comm_id(mad);
431 u32 pv_cm_id;
432 struct id_map_entry *id;
433 int sts;
434
435 if (mad->mad_hdr.attr_id == CM_REQ_ATTR_ID ||
436 mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
437 union ib_gid gid;
438
439 if (!slave)
440 return 0;
441
442 gid = gid_from_req_msg(ibdev, mad);
443 *slave = mlx4_ib_find_real_gid(ibdev, port, guid: gid.global.interface_id);
444 if (*slave < 0) {
445 mlx4_ib_warn(ibdev, "failed matching slave_id by gid (0x%llx)\n",
446 be64_to_cpu(gid.global.interface_id));
447 return -ENOENT;
448 }
449
450 sts = alloc_rej_tmout(sriov, rem_pv_cm_id, slave: *slave);
451 if (sts)
452 /* Even if this fails, we pass on the REQ to the slave */
453 pr_debug("Could not allocate rej_tmout entry. rem_pv_cm_id 0x%x slave %d status %d\n",
454 rem_pv_cm_id, *slave, sts);
455
456 return 0;
457 }
458
459 pv_cm_id = get_remote_comm_id(mad);
460 id = id_map_get(ibdev, pv_cm_id: (int *)&pv_cm_id, slave_id: -1, sl_cm_id: -1);
461
462 if (!id) {
463 if (mad->mad_hdr.attr_id == CM_REJ_ATTR_ID &&
464 REJ_REASON(mad) == IB_CM_REJ_TIMEOUT && slave) {
465 *slave = lookup_rej_tmout_slave(sriov, rem_pv_cm_id);
466
467 return (*slave < 0) ? *slave : 0;
468 }
469 pr_debug("Couldn't find an entry for pv_cm_id 0x%x, attr_id 0x%x\n",
470 pv_cm_id, be16_to_cpu(mad->mad_hdr.attr_id));
471 return -ENOENT;
472 }
473
474 if (slave)
475 *slave = id->slave_id;
476 set_remote_comm_id(mad, cm_id: id->sl_cm_id);
477
478 if (mad->mad_hdr.attr_id == CM_DREQ_ATTR_ID ||
479 mad->mad_hdr.attr_id == CM_REJ_ATTR_ID)
480 schedule_delayed(ibdev, id);
481
482 return 0;
483}
484
485void mlx4_ib_cm_paravirt_init(struct mlx4_ib_dev *dev)
486{
487 spin_lock_init(&dev->sriov.id_map_lock);
488 INIT_LIST_HEAD(list: &dev->sriov.cm_list);
489 dev->sriov.sl_id_map = RB_ROOT;
490 xa_init_flags(xa: &dev->sriov.pv_id_table, XA_FLAGS_ALLOC);
491 xa_init(xa: &dev->sriov.xa_rej_tmout);
492}
493
494static void rej_tmout_xa_cleanup(struct mlx4_ib_sriov *sriov, int slave)
495{
496 struct rej_tmout_entry *item;
497 bool flush_needed = false;
498 unsigned long id;
499 int cnt = 0;
500
501 xa_lock(&sriov->xa_rej_tmout);
502 xa_for_each(&sriov->xa_rej_tmout, id, item) {
503 if (slave < 0 || slave == item->slave) {
504 mod_delayed_work(wq: cm_wq, dwork: &item->timeout, delay: 0);
505 flush_needed = true;
506 ++cnt;
507 }
508 }
509 xa_unlock(&sriov->xa_rej_tmout);
510
511 if (flush_needed) {
512 flush_workqueue(cm_wq);
513 pr_debug("Deleted %d entries in xarray for slave %d during cleanup\n",
514 cnt, slave);
515 }
516
517 if (slave < 0)
518 WARN_ON(!xa_empty(&sriov->xa_rej_tmout));
519}
520
521/* slave = -1 ==> all slaves */
522/* TBD -- call paravirt clean for single slave. Need for slave RESET event */
523void mlx4_ib_cm_paravirt_clean(struct mlx4_ib_dev *dev, int slave)
524{
525 struct mlx4_ib_sriov *sriov = &dev->sriov;
526 struct rb_root *sl_id_map = &sriov->sl_id_map;
527 struct list_head lh;
528 struct rb_node *nd;
529 int need_flush = 0;
530 struct id_map_entry *map, *tmp_map;
531 /* cancel all delayed work queue entries */
532 INIT_LIST_HEAD(list: &lh);
533 spin_lock(lock: &sriov->id_map_lock);
534 list_for_each_entry_safe(map, tmp_map, &dev->sriov.cm_list, list) {
535 if (slave < 0 || slave == map->slave_id) {
536 if (map->scheduled_delete)
537 need_flush |= !cancel_delayed_work(dwork: &map->timeout);
538 }
539 }
540
541 spin_unlock(lock: &sriov->id_map_lock);
542
543 if (need_flush)
544 flush_workqueue(cm_wq); /* make sure all timers were flushed */
545
546 /* now, remove all leftover entries from databases*/
547 spin_lock(lock: &sriov->id_map_lock);
548 if (slave < 0) {
549 while (rb_first(root: sl_id_map)) {
550 struct id_map_entry *ent =
551 rb_entry(rb_first(sl_id_map),
552 struct id_map_entry, node);
553
554 rb_erase(&ent->node, sl_id_map);
555 xa_erase(&sriov->pv_id_table, index: ent->pv_cm_id);
556 }
557 list_splice_init(list: &dev->sriov.cm_list, head: &lh);
558 } else {
559 /* first, move nodes belonging to slave to db remove list */
560 nd = rb_first(root: sl_id_map);
561 while (nd) {
562 struct id_map_entry *ent =
563 rb_entry(nd, struct id_map_entry, node);
564 nd = rb_next(nd);
565 if (ent->slave_id == slave)
566 list_move_tail(list: &ent->list, head: &lh);
567 }
568 /* remove those nodes from databases */
569 list_for_each_entry_safe(map, tmp_map, &lh, list) {
570 rb_erase(&map->node, sl_id_map);
571 xa_erase(&sriov->pv_id_table, index: map->pv_cm_id);
572 }
573
574 /* add remaining nodes from cm_list */
575 list_for_each_entry_safe(map, tmp_map, &dev->sriov.cm_list, list) {
576 if (slave == map->slave_id)
577 list_move_tail(list: &map->list, head: &lh);
578 }
579 }
580
581 spin_unlock(lock: &sriov->id_map_lock);
582
583 /* free any map entries left behind due to cancel_delayed_work above */
584 list_for_each_entry_safe(map, tmp_map, &lh, list) {
585 list_del(entry: &map->list);
586 kfree(objp: map);
587 }
588
589 rej_tmout_xa_cleanup(sriov, slave);
590}
591
592int mlx4_ib_cm_init(void)
593{
594 cm_wq = alloc_workqueue("mlx4_ib_cm", WQ_PERCPU, 0);
595 if (!cm_wq)
596 return -ENOMEM;
597
598 return 0;
599}
600
601void mlx4_ib_cm_destroy(void)
602{
603 destroy_workqueue(wq: cm_wq);
604}
605

source code of linux/drivers/infiniband/hw/mlx4/cm.c