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1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
5 * Copyright (c) 2005 Voltaire, 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.
34 */
35
36#include <linux/if_vlan.h>
37#include <linux/errno.h>
38#include <linux/slab.h>
39#include <linux/workqueue.h>
40#include <linux/netdevice.h>
41#include <net/addrconf.h>
42
43#include <rdma/ib_cache.h>
44
45#include "core_priv.h"
46
47struct ib_pkey_cache {
48 int table_len;
49 u16 table[] __counted_by(table_len);
50};
51
52struct ib_update_work {
53 struct work_struct work;
54 struct ib_event event;
55 bool enforce_security;
56};
57
58union ib_gid zgid;
59EXPORT_SYMBOL(zgid);
60
61enum gid_attr_find_mask {
62 GID_ATTR_FIND_MASK_GID = 1UL << 0,
63 GID_ATTR_FIND_MASK_NETDEV = 1UL << 1,
64 GID_ATTR_FIND_MASK_DEFAULT = 1UL << 2,
65 GID_ATTR_FIND_MASK_GID_TYPE = 1UL << 3,
66};
67
68enum gid_table_entry_state {
69 GID_TABLE_ENTRY_INVALID = 1,
70 GID_TABLE_ENTRY_VALID = 2,
71 /*
72 * Indicates that entry is pending to be removed, there may
73 * be active users of this GID entry.
74 * When last user of the GID entry releases reference to it,
75 * GID entry is detached from the table.
76 */
77 GID_TABLE_ENTRY_PENDING_DEL = 3,
78};
79
80struct roce_gid_ndev_storage {
81 struct rcu_head rcu_head;
82 struct net_device *ndev;
83};
84
85struct ib_gid_table_entry {
86 struct kref kref;
87 struct work_struct del_work;
88 struct ib_gid_attr attr;
89 void *context;
90 /* Store the ndev pointer to release reference later on in
91 * call_rcu context because by that time gid_table_entry
92 * and attr might be already freed. So keep a copy of it.
93 * ndev_storage is freed by rcu callback.
94 */
95 struct roce_gid_ndev_storage *ndev_storage;
96 enum gid_table_entry_state state;
97};
98
99struct ib_gid_table {
100 int sz;
101 /* In RoCE, adding a GID to the table requires:
102 * (a) Find if this GID is already exists.
103 * (b) Find a free space.
104 * (c) Write the new GID
105 *
106 * Delete requires different set of operations:
107 * (a) Find the GID
108 * (b) Delete it.
109 *
110 **/
111 /* Any writer to data_vec must hold this lock and the write side of
112 * rwlock. Readers must hold only rwlock. All writers must be in a
113 * sleepable context.
114 */
115 struct mutex lock;
116 /* rwlock protects data_vec[ix]->state and entry pointer.
117 */
118 rwlock_t rwlock;
119 struct ib_gid_table_entry **data_vec;
120 /* bit field, each bit indicates the index of default GID */
121 u32 default_gid_indices;
122};
123
124static void dispatch_gid_change_event(struct ib_device *ib_dev, u32 port)
125{
126 struct ib_event event;
127
128 event.device = ib_dev;
129 event.element.port_num = port;
130 event.event = IB_EVENT_GID_CHANGE;
131
132 ib_dispatch_event_clients(&event);
133}
134
135static const char * const gid_type_str[] = {
136 /* IB/RoCE v1 value is set for IB_GID_TYPE_IB and IB_GID_TYPE_ROCE for
137 * user space compatibility reasons.
138 */
139 [IB_GID_TYPE_IB] = "IB/RoCE v1",
140 [IB_GID_TYPE_ROCE] = "IB/RoCE v1",
141 [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2",
142};
143
144const char *ib_cache_gid_type_str(enum ib_gid_type gid_type)
145{
146 if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type])
147 return gid_type_str[gid_type];
148
149 return "Invalid GID type";
150}
151EXPORT_SYMBOL(ib_cache_gid_type_str);
152
153/** rdma_is_zero_gid - Check if given GID is zero or not.
154 * @gid: GID to check
155 * Returns true if given GID is zero, returns false otherwise.
156 */
157bool rdma_is_zero_gid(const union ib_gid *gid)
158{
159 return !memcmp(gid, &zgid, sizeof(*gid));
160}
161EXPORT_SYMBOL(rdma_is_zero_gid);
162
163/** is_gid_index_default - Check if a given index belongs to
164 * reserved default GIDs or not.
165 * @table: GID table pointer
166 * @index: Index to check in GID table
167 * Returns true if index is one of the reserved default GID index otherwise
168 * returns false.
169 */
170static bool is_gid_index_default(const struct ib_gid_table *table,
171 unsigned int index)
172{
173 return index < 32 && (BIT(index) & table->default_gid_indices);
174}
175
176int ib_cache_gid_parse_type_str(const char *buf)
177{
178 unsigned int i;
179 size_t len;
180 int err = -EINVAL;
181
182 len = strlen(buf);
183 if (len == 0)
184 return -EINVAL;
185
186 if (buf[len - 1] == '\n')
187 len--;
188
189 for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i)
190 if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) &&
191 len == strlen(gid_type_str[i])) {
192 err = i;
193 break;
194 }
195
196 return err;
197}
198EXPORT_SYMBOL(ib_cache_gid_parse_type_str);
199
200static struct ib_gid_table *rdma_gid_table(struct ib_device *device, u32 port)
201{
202 return device->port_data[port].cache.gid;
203}
204
205static bool is_gid_entry_free(const struct ib_gid_table_entry *entry)
206{
207 return !entry;
208}
209
210static bool is_gid_entry_valid(const struct ib_gid_table_entry *entry)
211{
212 return entry && entry->state == GID_TABLE_ENTRY_VALID;
213}
214
215static void schedule_free_gid(struct kref *kref)
216{
217 struct ib_gid_table_entry *entry =
218 container_of(kref, struct ib_gid_table_entry, kref);
219
220 queue_work(ib_wq, &entry->del_work);
221}
222
223static void put_gid_ndev(struct rcu_head *head)
224{
225 struct roce_gid_ndev_storage *storage =
226 container_of(head, struct roce_gid_ndev_storage, rcu_head);
227
228 WARN_ON(!storage->ndev);
229 /* At this point its safe to release netdev reference,
230 * as all callers working on gid_attr->ndev are done
231 * using this netdev.
232 */
233 dev_put(storage->ndev);
234 kfree(storage);
235}
236
237static void free_gid_entry_locked(struct ib_gid_table_entry *entry)
238{
239 struct ib_device *device = entry->attr.device;
240 u32 port_num = entry->attr.port_num;
241 struct ib_gid_table *table = rdma_gid_table(device, port_num);
242
243 dev_dbg(&device->dev, "%s port=%u index=%u gid %pI6\n", __func__,
244 port_num, entry->attr.index, entry->attr.gid.raw);
245
246 write_lock_irq(&table->rwlock);
247
248 /*
249 * The only way to avoid overwriting NULL in table is
250 * by comparing if it is same entry in table or not!
251 * If new entry in table is added by the time we free here,
252 * don't overwrite the table entry.
253 */
254 if (entry == table->data_vec[entry->attr.index])
255 table->data_vec[entry->attr.index] = NULL;
256 /* Now this index is ready to be allocated */
257 write_unlock_irq(&table->rwlock);
258
259 if (entry->ndev_storage)
260 call_rcu(&entry->ndev_storage->rcu_head, put_gid_ndev);
261 kfree(entry);
262}
263
264static void free_gid_entry(struct kref *kref)
265{
266 struct ib_gid_table_entry *entry =
267 container_of(kref, struct ib_gid_table_entry, kref);
268
269 free_gid_entry_locked(entry);
270}
271
272/**
273 * free_gid_work - Release reference to the GID entry
274 * @work: Work structure to refer to GID entry which needs to be
275 * deleted.
276 *
277 * free_gid_work() frees the entry from the HCA's hardware table
278 * if provider supports it. It releases reference to netdevice.
279 */
280static void free_gid_work(struct work_struct *work)
281{
282 struct ib_gid_table_entry *entry =
283 container_of(work, struct ib_gid_table_entry, del_work);
284 struct ib_device *device = entry->attr.device;
285 u32 port_num = entry->attr.port_num;
286 struct ib_gid_table *table = rdma_gid_table(device, port_num);
287
288 mutex_lock(&table->lock);
289 free_gid_entry_locked(entry);
290 mutex_unlock(&table->lock);
291}
292
293static struct ib_gid_table_entry *
294alloc_gid_entry(const struct ib_gid_attr *attr)
295{
296 struct ib_gid_table_entry *entry;
297 struct net_device *ndev;
298
299 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
300 if (!entry)
301 return NULL;
302
303 ndev = rcu_dereference_protected(attr->ndev, 1);
304 if (ndev) {
305 entry->ndev_storage = kzalloc(sizeof(*entry->ndev_storage),
306 GFP_KERNEL);
307 if (!entry->ndev_storage) {
308 kfree(entry);
309 return NULL;
310 }
311 dev_hold(ndev);
312 entry->ndev_storage->ndev = ndev;
313 }
314 kref_init(&entry->kref);
315 memcpy(&entry->attr, attr, sizeof(*attr));
316 INIT_WORK(&entry->del_work, free_gid_work);
317 entry->state = GID_TABLE_ENTRY_INVALID;
318 return entry;
319}
320
321static void store_gid_entry(struct ib_gid_table *table,
322 struct ib_gid_table_entry *entry)
323{
324 entry->state = GID_TABLE_ENTRY_VALID;
325
326 dev_dbg(&entry->attr.device->dev, "%s port=%u index=%u gid %pI6\n",
327 __func__, entry->attr.port_num, entry->attr.index,
328 entry->attr.gid.raw);
329
330 lockdep_assert_held(&table->lock);
331 write_lock_irq(&table->rwlock);
332 table->data_vec[entry->attr.index] = entry;
333 write_unlock_irq(&table->rwlock);
334}
335
336static void get_gid_entry(struct ib_gid_table_entry *entry)
337{
338 kref_get(&entry->kref);
339}
340
341static void put_gid_entry(struct ib_gid_table_entry *entry)
342{
343 kref_put(&entry->kref, schedule_free_gid);
344}
345
346static void put_gid_entry_locked(struct ib_gid_table_entry *entry)
347{
348 kref_put(&entry->kref, free_gid_entry);
349}
350
351static int add_roce_gid(struct ib_gid_table_entry *entry)
352{
353 const struct ib_gid_attr *attr = &entry->attr;
354 int ret;
355
356 if (!attr->ndev) {
357 dev_err(&attr->device->dev, "%s NULL netdev port=%u index=%u\n",
358 __func__, attr->port_num, attr->index);
359 return -EINVAL;
360 }
361 if (rdma_cap_roce_gid_table(attr->device, attr->port_num)) {
362 ret = attr->device->ops.add_gid(attr, &entry->context);
363 if (ret) {
364 dev_err(&attr->device->dev,
365 "%s GID add failed port=%u index=%u\n",
366 __func__, attr->port_num, attr->index);
367 return ret;
368 }
369 }
370 return 0;
371}
372
373/**
374 * del_gid - Delete GID table entry
375 *
376 * @ib_dev: IB device whose GID entry to be deleted
377 * @port: Port number of the IB device
378 * @table: GID table of the IB device for a port
379 * @ix: GID entry index to delete
380 *
381 */
382static void del_gid(struct ib_device *ib_dev, u32 port,
383 struct ib_gid_table *table, int ix)
384{
385 struct roce_gid_ndev_storage *ndev_storage;
386 struct ib_gid_table_entry *entry;
387
388 lockdep_assert_held(&table->lock);
389
390 dev_dbg(&ib_dev->dev, "%s port=%u index=%d gid %pI6\n", __func__, port,
391 ix, table->data_vec[ix]->attr.gid.raw);
392
393 write_lock_irq(&table->rwlock);
394 entry = table->data_vec[ix];
395 entry->state = GID_TABLE_ENTRY_PENDING_DEL;
396 /*
397 * For non RoCE protocol, GID entry slot is ready to use.
398 */
399 if (!rdma_protocol_roce(ib_dev, port))
400 table->data_vec[ix] = NULL;
401 write_unlock_irq(&table->rwlock);
402
403 if (rdma_cap_roce_gid_table(ib_dev, port))
404 ib_dev->ops.del_gid(&entry->attr, &entry->context);
405
406 ndev_storage = entry->ndev_storage;
407 if (ndev_storage) {
408 entry->ndev_storage = NULL;
409 rcu_assign_pointer(entry->attr.ndev, NULL);
410 call_rcu(&ndev_storage->rcu_head, put_gid_ndev);
411 }
412
413 put_gid_entry_locked(entry);
414}
415
416/**
417 * add_modify_gid - Add or modify GID table entry
418 *
419 * @table: GID table in which GID to be added or modified
420 * @attr: Attributes of the GID
421 *
422 * Returns 0 on success or appropriate error code. It accepts zero
423 * GID addition for non RoCE ports for HCA's who report them as valid
424 * GID. However such zero GIDs are not added to the cache.
425 */
426static int add_modify_gid(struct ib_gid_table *table,
427 const struct ib_gid_attr *attr)
428{
429 struct ib_gid_table_entry *entry;
430 int ret = 0;
431
432 /*
433 * Invalidate any old entry in the table to make it safe to write to
434 * this index.
435 */
436 if (is_gid_entry_valid(table->data_vec[attr->index]))
437 del_gid(attr->device, attr->port_num, table, attr->index);
438
439 /*
440 * Some HCA's report multiple GID entries with only one valid GID, and
441 * leave other unused entries as the zero GID. Convert zero GIDs to
442 * empty table entries instead of storing them.
443 */
444 if (rdma_is_zero_gid(&attr->gid))
445 return 0;
446
447 entry = alloc_gid_entry(attr);
448 if (!entry)
449 return -ENOMEM;
450
451 if (rdma_protocol_roce(attr->device, attr->port_num)) {
452 ret = add_roce_gid(entry);
453 if (ret)
454 goto done;
455 }
456
457 store_gid_entry(table, entry);
458 return 0;
459
460done:
461 put_gid_entry(entry);
462 return ret;
463}
464
465/* rwlock should be read locked, or lock should be held */
466static int find_gid(struct ib_gid_table *table, const union ib_gid *gid,
467 const struct ib_gid_attr *val, bool default_gid,
468 unsigned long mask, int *pempty)
469{
470 int i = 0;
471 int found = -1;
472 int empty = pempty ? -1 : 0;
473
474 while (i < table->sz && (found < 0 || empty < 0)) {
475 struct ib_gid_table_entry *data = table->data_vec[i];
476 struct ib_gid_attr *attr;
477 int curr_index = i;
478
479 i++;
480
481 /* find_gid() is used during GID addition where it is expected
482 * to return a free entry slot which is not duplicate.
483 * Free entry slot is requested and returned if pempty is set,
484 * so lookup free slot only if requested.
485 */
486 if (pempty && empty < 0) {
487 if (is_gid_entry_free(data) &&
488 default_gid ==
489 is_gid_index_default(table, curr_index)) {
490 /*
491 * Found an invalid (free) entry; allocate it.
492 * If default GID is requested, then our
493 * found slot must be one of the DEFAULT
494 * reserved slots or we fail.
495 * This ensures that only DEFAULT reserved
496 * slots are used for default property GIDs.
497 */
498 empty = curr_index;
499 }
500 }
501
502 /*
503 * Additionally find_gid() is used to find valid entry during
504 * lookup operation; so ignore the entries which are marked as
505 * pending for removal and the entries which are marked as
506 * invalid.
507 */
508 if (!is_gid_entry_valid(data))
509 continue;
510
511 if (found >= 0)
512 continue;
513
514 attr = &data->attr;
515 if (mask & GID_ATTR_FIND_MASK_GID_TYPE &&
516 attr->gid_type != val->gid_type)
517 continue;
518
519 if (mask & GID_ATTR_FIND_MASK_GID &&
520 memcmp(gid, &data->attr.gid, sizeof(*gid)))
521 continue;
522
523 if (mask & GID_ATTR_FIND_MASK_NETDEV &&
524 attr->ndev != val->ndev)
525 continue;
526
527 if (mask & GID_ATTR_FIND_MASK_DEFAULT &&
528 is_gid_index_default(table, curr_index) != default_gid)
529 continue;
530
531 found = curr_index;
532 }
533
534 if (pempty)
535 *pempty = empty;
536
537 return found;
538}
539
540static void make_default_gid(struct net_device *dev, union ib_gid *gid)
541{
542 gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
543 addrconf_ifid_eui48(&gid->raw[8], dev);
544}
545
546static int __ib_cache_gid_add(struct ib_device *ib_dev, u32 port,
547 union ib_gid *gid, struct ib_gid_attr *attr,
548 unsigned long mask, bool default_gid)
549{
550 struct ib_gid_table *table;
551 int ret = 0;
552 int empty;
553 int ix;
554
555 /* Do not allow adding zero GID in support of
556 * IB spec version 1.3 section 4.1.1 point (6) and
557 * section 12.7.10 and section 12.7.20
558 */
559 if (rdma_is_zero_gid(gid))
560 return -EINVAL;
561
562 table = rdma_gid_table(ib_dev, port);
563
564 mutex_lock(&table->lock);
565
566 ix = find_gid(table, gid, attr, default_gid, mask, &empty);
567 if (ix >= 0)
568 goto out_unlock;
569
570 if (empty < 0) {
571 ret = -ENOSPC;
572 goto out_unlock;
573 }
574 attr->device = ib_dev;
575 attr->index = empty;
576 attr->port_num = port;
577 attr->gid = *gid;
578 ret = add_modify_gid(table, attr);
579 if (!ret)
580 dispatch_gid_change_event(ib_dev, port);
581
582out_unlock:
583 mutex_unlock(&table->lock);
584 if (ret)
585 pr_warn("%s: unable to add gid %pI6 error=%d\n",
586 __func__, gid->raw, ret);
587 return ret;
588}
589
590int ib_cache_gid_add(struct ib_device *ib_dev, u32 port,
591 union ib_gid *gid, struct ib_gid_attr *attr)
592{
593 unsigned long mask = GID_ATTR_FIND_MASK_GID |
594 GID_ATTR_FIND_MASK_GID_TYPE |
595 GID_ATTR_FIND_MASK_NETDEV;
596
597 return __ib_cache_gid_add(ib_dev, port, gid, attr, mask, false);
598}
599
600static int
601_ib_cache_gid_del(struct ib_device *ib_dev, u32 port,
602 union ib_gid *gid, struct ib_gid_attr *attr,
603 unsigned long mask, bool default_gid)
604{
605 struct ib_gid_table *table;
606 int ret = 0;
607 int ix;
608
609 table = rdma_gid_table(ib_dev, port);
610
611 mutex_lock(&table->lock);
612
613 ix = find_gid(table, gid, attr, default_gid, mask, NULL);
614 if (ix < 0) {
615 ret = -EINVAL;
616 goto out_unlock;
617 }
618
619 del_gid(ib_dev, port, table, ix);
620 dispatch_gid_change_event(ib_dev, port);
621
622out_unlock:
623 mutex_unlock(&table->lock);
624 if (ret)
625 pr_debug("%s: can't delete gid %pI6 error=%d\n",
626 __func__, gid->raw, ret);
627 return ret;
628}
629
630int ib_cache_gid_del(struct ib_device *ib_dev, u32 port,
631 union ib_gid *gid, struct ib_gid_attr *attr)
632{
633 unsigned long mask = GID_ATTR_FIND_MASK_GID |
634 GID_ATTR_FIND_MASK_GID_TYPE |
635 GID_ATTR_FIND_MASK_DEFAULT |
636 GID_ATTR_FIND_MASK_NETDEV;
637
638 return _ib_cache_gid_del(ib_dev, port, gid, attr, mask, false);
639}
640
641int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u32 port,
642 struct net_device *ndev)
643{
644 struct ib_gid_table *table;
645 int ix;
646 bool deleted = false;
647
648 table = rdma_gid_table(ib_dev, port);
649
650 mutex_lock(&table->lock);
651
652 for (ix = 0; ix < table->sz; ix++) {
653 if (is_gid_entry_valid(table->data_vec[ix]) &&
654 table->data_vec[ix]->attr.ndev == ndev) {
655 del_gid(ib_dev, port, table, ix);
656 deleted = true;
657 }
658 }
659
660 mutex_unlock(&table->lock);
661
662 if (deleted)
663 dispatch_gid_change_event(ib_dev, port);
664
665 return 0;
666}
667
668/**
669 * rdma_find_gid_by_port - Returns the GID entry attributes when it finds
670 * a valid GID entry for given search parameters. It searches for the specified
671 * GID value in the local software cache.
672 * @ib_dev: The device to query.
673 * @gid: The GID value to search for.
674 * @gid_type: The GID type to search for.
675 * @port: The port number of the device where the GID value should be searched.
676 * @ndev: In RoCE, the net device of the device. NULL means ignore.
677 *
678 * Returns sgid attributes if the GID is found with valid reference or
679 * returns ERR_PTR for the error.
680 * The caller must invoke rdma_put_gid_attr() to release the reference.
681 */
682const struct ib_gid_attr *
683rdma_find_gid_by_port(struct ib_device *ib_dev,
684 const union ib_gid *gid,
685 enum ib_gid_type gid_type,
686 u32 port, struct net_device *ndev)
687{
688 int local_index;
689 struct ib_gid_table *table;
690 unsigned long mask = GID_ATTR_FIND_MASK_GID |
691 GID_ATTR_FIND_MASK_GID_TYPE;
692 struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type};
693 const struct ib_gid_attr *attr;
694 unsigned long flags;
695
696 if (!rdma_is_port_valid(ib_dev, port))
697 return ERR_PTR(-ENOENT);
698
699 table = rdma_gid_table(ib_dev, port);
700
701 if (ndev)
702 mask |= GID_ATTR_FIND_MASK_NETDEV;
703
704 read_lock_irqsave(&table->rwlock, flags);
705 local_index = find_gid(table, gid, &val, false, mask, NULL);
706 if (local_index >= 0) {
707 get_gid_entry(table->data_vec[local_index]);
708 attr = &table->data_vec[local_index]->attr;
709 read_unlock_irqrestore(&table->rwlock, flags);
710 return attr;
711 }
712
713 read_unlock_irqrestore(&table->rwlock, flags);
714 return ERR_PTR(-ENOENT);
715}
716EXPORT_SYMBOL(rdma_find_gid_by_port);
717
718/**
719 * rdma_find_gid_by_filter - Returns the GID table attribute where a
720 * specified GID value occurs
721 * @ib_dev: The device to query.
722 * @gid: The GID value to search for.
723 * @port: The port number of the device where the GID value could be
724 * searched.
725 * @filter: The filter function is executed on any matching GID in the table.
726 * If the filter function returns true, the corresponding index is returned,
727 * otherwise, we continue searching the GID table. It's guaranteed that
728 * while filter is executed, ndev field is valid and the structure won't
729 * change. filter is executed in an atomic context. filter must not be NULL.
730 * @context: Private data to pass into the call-back.
731 *
732 * rdma_find_gid_by_filter() searches for the specified GID value
733 * of which the filter function returns true in the port's GID table.
734 *
735 */
736const struct ib_gid_attr *rdma_find_gid_by_filter(
737 struct ib_device *ib_dev, const union ib_gid *gid, u32 port,
738 bool (*filter)(const union ib_gid *gid, const struct ib_gid_attr *,
739 void *),
740 void *context)
741{
742 const struct ib_gid_attr *res = ERR_PTR(-ENOENT);
743 struct ib_gid_table *table;
744 unsigned long flags;
745 unsigned int i;
746
747 if (!rdma_is_port_valid(ib_dev, port))
748 return ERR_PTR(-EINVAL);
749
750 table = rdma_gid_table(ib_dev, port);
751
752 read_lock_irqsave(&table->rwlock, flags);
753 for (i = 0; i < table->sz; i++) {
754 struct ib_gid_table_entry *entry = table->data_vec[i];
755
756 if (!is_gid_entry_valid(entry))
757 continue;
758
759 if (memcmp(gid, &entry->attr.gid, sizeof(*gid)))
760 continue;
761
762 if (filter(gid, &entry->attr, context)) {
763 get_gid_entry(entry);
764 res = &entry->attr;
765 break;
766 }
767 }
768 read_unlock_irqrestore(&table->rwlock, flags);
769 return res;
770}
771
772static struct ib_gid_table *alloc_gid_table(int sz)
773{
774 struct ib_gid_table *table = kzalloc(sizeof(*table), GFP_KERNEL);
775
776 if (!table)
777 return NULL;
778
779 table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL);
780 if (!table->data_vec)
781 goto err_free_table;
782
783 mutex_init(&table->lock);
784
785 table->sz = sz;
786 rwlock_init(&table->rwlock);
787 return table;
788
789err_free_table:
790 kfree(table);
791 return NULL;
792}
793
794static void release_gid_table(struct ib_device *device,
795 struct ib_gid_table *table)
796{
797 bool leak = false;
798 int i;
799
800 if (!table)
801 return;
802
803 for (i = 0; i < table->sz; i++) {
804 if (is_gid_entry_free(table->data_vec[i]))
805 continue;
806 if (kref_read(&table->data_vec[i]->kref) > 1) {
807 dev_err(&device->dev,
808 "GID entry ref leak for index %d ref=%u\n", i,
809 kref_read(&table->data_vec[i]->kref));
810 leak = true;
811 }
812 }
813 if (leak)
814 return;
815
816 mutex_destroy(&table->lock);
817 kfree(table->data_vec);
818 kfree(table);
819}
820
821static void cleanup_gid_table_port(struct ib_device *ib_dev, u32 port,
822 struct ib_gid_table *table)
823{
824 int i;
825
826 if (!table)
827 return;
828
829 mutex_lock(&table->lock);
830 for (i = 0; i < table->sz; ++i) {
831 if (is_gid_entry_valid(table->data_vec[i]))
832 del_gid(ib_dev, port, table, i);
833 }
834 mutex_unlock(&table->lock);
835}
836
837void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u32 port,
838 struct net_device *ndev,
839 unsigned long gid_type_mask,
840 enum ib_cache_gid_default_mode mode)
841{
842 union ib_gid gid = { };
843 struct ib_gid_attr gid_attr;
844 unsigned int gid_type;
845 unsigned long mask;
846
847 mask = GID_ATTR_FIND_MASK_GID_TYPE |
848 GID_ATTR_FIND_MASK_DEFAULT |
849 GID_ATTR_FIND_MASK_NETDEV;
850 memset(&gid_attr, 0, sizeof(gid_attr));
851 gid_attr.ndev = ndev;
852
853 for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) {
854 if (1UL << gid_type & ~gid_type_mask)
855 continue;
856
857 gid_attr.gid_type = gid_type;
858
859 if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) {
860 make_default_gid(ndev, &gid);
861 __ib_cache_gid_add(ib_dev, port, &gid,
862 &gid_attr, mask, true);
863 } else if (mode == IB_CACHE_GID_DEFAULT_MODE_DELETE) {
864 _ib_cache_gid_del(ib_dev, port, &gid,
865 &gid_attr, mask, true);
866 }
867 }
868}
869
870static void gid_table_reserve_default(struct ib_device *ib_dev, u32 port,
871 struct ib_gid_table *table)
872{
873 unsigned int i;
874 unsigned long roce_gid_type_mask;
875 unsigned int num_default_gids;
876
877 roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
878 num_default_gids = hweight_long(roce_gid_type_mask);
879 /* Reserve starting indices for default GIDs */
880 for (i = 0; i < num_default_gids && i < table->sz; i++)
881 table->default_gid_indices |= BIT(i);
882}
883
884
885static void gid_table_release_one(struct ib_device *ib_dev)
886{
887 u32 p;
888
889 rdma_for_each_port (ib_dev, p) {
890 release_gid_table(ib_dev, ib_dev->port_data[p].cache.gid);
891 ib_dev->port_data[p].cache.gid = NULL;
892 }
893}
894
895static int _gid_table_setup_one(struct ib_device *ib_dev)
896{
897 struct ib_gid_table *table;
898 u32 rdma_port;
899
900 rdma_for_each_port (ib_dev, rdma_port) {
901 table = alloc_gid_table(
902 ib_dev->port_data[rdma_port].immutable.gid_tbl_len);
903 if (!table)
904 goto rollback_table_setup;
905
906 gid_table_reserve_default(ib_dev, rdma_port, table);
907 ib_dev->port_data[rdma_port].cache.gid = table;
908 }
909 return 0;
910
911rollback_table_setup:
912 gid_table_release_one(ib_dev);
913 return -ENOMEM;
914}
915
916static void gid_table_cleanup_one(struct ib_device *ib_dev)
917{
918 u32 p;
919
920 rdma_for_each_port (ib_dev, p)
921 cleanup_gid_table_port(ib_dev, p,
922 ib_dev->port_data[p].cache.gid);
923}
924
925static int gid_table_setup_one(struct ib_device *ib_dev)
926{
927 int err;
928
929 err = _gid_table_setup_one(ib_dev);
930
931 if (err)
932 return err;
933
934 rdma_roce_rescan_device(ib_dev);
935
936 return err;
937}
938
939/**
940 * rdma_query_gid - Read the GID content from the GID software cache
941 * @device: Device to query the GID
942 * @port_num: Port number of the device
943 * @index: Index of the GID table entry to read
944 * @gid: Pointer to GID where to store the entry's GID
945 *
946 * rdma_query_gid() only reads the GID entry content for requested device,
947 * port and index. It reads for IB, RoCE and iWarp link layers. It doesn't
948 * hold any reference to the GID table entry in the HCA or software cache.
949 *
950 * Returns 0 on success or appropriate error code.
951 *
952 */
953int rdma_query_gid(struct ib_device *device, u32 port_num,
954 int index, union ib_gid *gid)
955{
956 struct ib_gid_table *table;
957 unsigned long flags;
958 int res;
959
960 if (!rdma_is_port_valid(device, port_num))
961 return -EINVAL;
962
963 table = rdma_gid_table(device, port_num);
964 read_lock_irqsave(&table->rwlock, flags);
965
966 if (index < 0 || index >= table->sz) {
967 res = -EINVAL;
968 goto done;
969 }
970
971 if (!is_gid_entry_valid(table->data_vec[index])) {
972 res = -ENOENT;
973 goto done;
974 }
975
976 memcpy(gid, &table->data_vec[index]->attr.gid, sizeof(*gid));
977 res = 0;
978
979done:
980 read_unlock_irqrestore(&table->rwlock, flags);
981 return res;
982}
983EXPORT_SYMBOL(rdma_query_gid);
984
985/**
986 * rdma_read_gid_hw_context - Read the HW GID context from GID attribute
987 * @attr: Potinter to the GID attribute
988 *
989 * rdma_read_gid_hw_context() reads the drivers GID HW context corresponding
990 * to the SGID attr. Callers are required to already be holding the reference
991 * to an existing GID entry.
992 *
993 * Returns the HW GID context
994 *
995 */
996void *rdma_read_gid_hw_context(const struct ib_gid_attr *attr)
997{
998 return container_of(attr, struct ib_gid_table_entry, attr)->context;
999}
1000EXPORT_SYMBOL(rdma_read_gid_hw_context);
1001
1002/**
1003 * rdma_find_gid - Returns SGID attributes if the matching GID is found.
1004 * @device: The device to query.
1005 * @gid: The GID value to search for.
1006 * @gid_type: The GID type to search for.
1007 * @ndev: In RoCE, the net device of the device. NULL means ignore.
1008 *
1009 * rdma_find_gid() searches for the specified GID value in the software cache.
1010 *
1011 * Returns GID attributes if a valid GID is found or returns ERR_PTR for the
1012 * error. The caller must invoke rdma_put_gid_attr() to release the reference.
1013 *
1014 */
1015const struct ib_gid_attr *rdma_find_gid(struct ib_device *device,
1016 const union ib_gid *gid,
1017 enum ib_gid_type gid_type,
1018 struct net_device *ndev)
1019{
1020 unsigned long mask = GID_ATTR_FIND_MASK_GID |
1021 GID_ATTR_FIND_MASK_GID_TYPE;
1022 struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type};
1023 u32 p;
1024
1025 if (ndev)
1026 mask |= GID_ATTR_FIND_MASK_NETDEV;
1027
1028 rdma_for_each_port(device, p) {
1029 struct ib_gid_table *table;
1030 unsigned long flags;
1031 int index;
1032
1033 table = device->port_data[p].cache.gid;
1034 read_lock_irqsave(&table->rwlock, flags);
1035 index = find_gid(table, gid, &gid_attr_val, false, mask, NULL);
1036 if (index >= 0) {
1037 const struct ib_gid_attr *attr;
1038
1039 get_gid_entry(table->data_vec[index]);
1040 attr = &table->data_vec[index]->attr;
1041 read_unlock_irqrestore(&table->rwlock, flags);
1042 return attr;
1043 }
1044 read_unlock_irqrestore(&table->rwlock, flags);
1045 }
1046
1047 return ERR_PTR(-ENOENT);
1048}
1049EXPORT_SYMBOL(rdma_find_gid);
1050
1051int ib_get_cached_pkey(struct ib_device *device,
1052 u32 port_num,
1053 int index,
1054 u16 *pkey)
1055{
1056 struct ib_pkey_cache *cache;
1057 unsigned long flags;
1058 int ret = 0;
1059
1060 if (!rdma_is_port_valid(device, port_num))
1061 return -EINVAL;
1062
1063 read_lock_irqsave(&device->cache_lock, flags);
1064
1065 cache = device->port_data[port_num].cache.pkey;
1066
1067 if (!cache || index < 0 || index >= cache->table_len)
1068 ret = -EINVAL;
1069 else
1070 *pkey = cache->table[index];
1071
1072 read_unlock_irqrestore(&device->cache_lock, flags);
1073
1074 return ret;
1075}
1076EXPORT_SYMBOL(ib_get_cached_pkey);
1077
1078void ib_get_cached_subnet_prefix(struct ib_device *device, u32 port_num,
1079 u64 *sn_pfx)
1080{
1081 unsigned long flags;
1082
1083 read_lock_irqsave(&device->cache_lock, flags);
1084 *sn_pfx = device->port_data[port_num].cache.subnet_prefix;
1085 read_unlock_irqrestore(&device->cache_lock, flags);
1086}
1087EXPORT_SYMBOL(ib_get_cached_subnet_prefix);
1088
1089int ib_find_cached_pkey(struct ib_device *device, u32 port_num,
1090 u16 pkey, u16 *index)
1091{
1092 struct ib_pkey_cache *cache;
1093 unsigned long flags;
1094 int i;
1095 int ret = -ENOENT;
1096 int partial_ix = -1;
1097
1098 if (!rdma_is_port_valid(device, port_num))
1099 return -EINVAL;
1100
1101 read_lock_irqsave(&device->cache_lock, flags);
1102
1103 cache = device->port_data[port_num].cache.pkey;
1104 if (!cache) {
1105 ret = -EINVAL;
1106 goto err;
1107 }
1108
1109 *index = -1;
1110
1111 for (i = 0; i < cache->table_len; ++i)
1112 if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) {
1113 if (cache->table[i] & 0x8000) {
1114 *index = i;
1115 ret = 0;
1116 break;
1117 } else {
1118 partial_ix = i;
1119 }
1120 }
1121
1122 if (ret && partial_ix >= 0) {
1123 *index = partial_ix;
1124 ret = 0;
1125 }
1126
1127err:
1128 read_unlock_irqrestore(&device->cache_lock, flags);
1129
1130 return ret;
1131}
1132EXPORT_SYMBOL(ib_find_cached_pkey);
1133
1134int ib_find_exact_cached_pkey(struct ib_device *device, u32 port_num,
1135 u16 pkey, u16 *index)
1136{
1137 struct ib_pkey_cache *cache;
1138 unsigned long flags;
1139 int i;
1140 int ret = -ENOENT;
1141
1142 if (!rdma_is_port_valid(device, port_num))
1143 return -EINVAL;
1144
1145 read_lock_irqsave(&device->cache_lock, flags);
1146
1147 cache = device->port_data[port_num].cache.pkey;
1148 if (!cache) {
1149 ret = -EINVAL;
1150 goto err;
1151 }
1152
1153 *index = -1;
1154
1155 for (i = 0; i < cache->table_len; ++i)
1156 if (cache->table[i] == pkey) {
1157 *index = i;
1158 ret = 0;
1159 break;
1160 }
1161
1162err:
1163 read_unlock_irqrestore(&device->cache_lock, flags);
1164
1165 return ret;
1166}
1167EXPORT_SYMBOL(ib_find_exact_cached_pkey);
1168
1169int ib_get_cached_lmc(struct ib_device *device, u32 port_num, u8 *lmc)
1170{
1171 unsigned long flags;
1172 int ret = 0;
1173
1174 if (!rdma_is_port_valid(device, port_num))
1175 return -EINVAL;
1176
1177 read_lock_irqsave(&device->cache_lock, flags);
1178 *lmc = device->port_data[port_num].cache.lmc;
1179 read_unlock_irqrestore(&device->cache_lock, flags);
1180
1181 return ret;
1182}
1183EXPORT_SYMBOL(ib_get_cached_lmc);
1184
1185int ib_get_cached_port_state(struct ib_device *device, u32 port_num,
1186 enum ib_port_state *port_state)
1187{
1188 unsigned long flags;
1189 int ret = 0;
1190
1191 if (!rdma_is_port_valid(device, port_num))
1192 return -EINVAL;
1193
1194 read_lock_irqsave(&device->cache_lock, flags);
1195 *port_state = device->port_data[port_num].cache.port_state;
1196 read_unlock_irqrestore(&device->cache_lock, flags);
1197
1198 return ret;
1199}
1200EXPORT_SYMBOL(ib_get_cached_port_state);
1201
1202/**
1203 * rdma_get_gid_attr - Returns GID attributes for a port of a device
1204 * at a requested gid_index, if a valid GID entry exists.
1205 * @device: The device to query.
1206 * @port_num: The port number on the device where the GID value
1207 * is to be queried.
1208 * @index: Index of the GID table entry whose attributes are to
1209 * be queried.
1210 *
1211 * rdma_get_gid_attr() acquires reference count of gid attributes from the
1212 * cached GID table. Caller must invoke rdma_put_gid_attr() to release
1213 * reference to gid attribute regardless of link layer.
1214 *
1215 * Returns pointer to valid gid attribute or ERR_PTR for the appropriate error
1216 * code.
1217 */
1218const struct ib_gid_attr *
1219rdma_get_gid_attr(struct ib_device *device, u32 port_num, int index)
1220{
1221 const struct ib_gid_attr *attr = ERR_PTR(-ENODATA);
1222 struct ib_gid_table *table;
1223 unsigned long flags;
1224
1225 if (!rdma_is_port_valid(device, port_num))
1226 return ERR_PTR(-EINVAL);
1227
1228 table = rdma_gid_table(device, port_num);
1229 if (index < 0 || index >= table->sz)
1230 return ERR_PTR(-EINVAL);
1231
1232 read_lock_irqsave(&table->rwlock, flags);
1233 if (!is_gid_entry_valid(table->data_vec[index]))
1234 goto done;
1235
1236 get_gid_entry(table->data_vec[index]);
1237 attr = &table->data_vec[index]->attr;
1238done:
1239 read_unlock_irqrestore(&table->rwlock, flags);
1240 return attr;
1241}
1242EXPORT_SYMBOL(rdma_get_gid_attr);
1243
1244/**
1245 * rdma_query_gid_table - Reads GID table entries of all the ports of a device up to max_entries.
1246 * @device: The device to query.
1247 * @entries: Entries where GID entries are returned.
1248 * @max_entries: Maximum number of entries that can be returned.
1249 * Entries array must be allocated to hold max_entries number of entries.
1250 *
1251 * Returns number of entries on success or appropriate error code.
1252 */
1253ssize_t rdma_query_gid_table(struct ib_device *device,
1254 struct ib_uverbs_gid_entry *entries,
1255 size_t max_entries)
1256{
1257 const struct ib_gid_attr *gid_attr;
1258 ssize_t num_entries = 0, ret;
1259 struct ib_gid_table *table;
1260 u32 port_num, i;
1261 struct net_device *ndev;
1262 unsigned long flags;
1263
1264 rdma_for_each_port(device, port_num) {
1265 table = rdma_gid_table(device, port_num);
1266 read_lock_irqsave(&table->rwlock, flags);
1267 for (i = 0; i < table->sz; i++) {
1268 if (!is_gid_entry_valid(table->data_vec[i]))
1269 continue;
1270 if (num_entries >= max_entries) {
1271 ret = -EINVAL;
1272 goto err;
1273 }
1274
1275 gid_attr = &table->data_vec[i]->attr;
1276
1277 memcpy(&entries->gid, &gid_attr->gid,
1278 sizeof(gid_attr->gid));
1279 entries->gid_index = gid_attr->index;
1280 entries->port_num = gid_attr->port_num;
1281 entries->gid_type = gid_attr->gid_type;
1282 ndev = rcu_dereference_protected(
1283 gid_attr->ndev,
1284 lockdep_is_held(&table->rwlock));
1285 if (ndev)
1286 entries->netdev_ifindex = ndev->ifindex;
1287
1288 num_entries++;
1289 entries++;
1290 }
1291 read_unlock_irqrestore(&table->rwlock, flags);
1292 }
1293
1294 return num_entries;
1295err:
1296 read_unlock_irqrestore(&table->rwlock, flags);
1297 return ret;
1298}
1299EXPORT_SYMBOL(rdma_query_gid_table);
1300
1301/**
1302 * rdma_put_gid_attr - Release reference to the GID attribute
1303 * @attr: Pointer to the GID attribute whose reference
1304 * needs to be released.
1305 *
1306 * rdma_put_gid_attr() must be used to release reference whose
1307 * reference is acquired using rdma_get_gid_attr() or any APIs
1308 * which returns a pointer to the ib_gid_attr regardless of link layer
1309 * of IB or RoCE.
1310 *
1311 */
1312void rdma_put_gid_attr(const struct ib_gid_attr *attr)
1313{
1314 struct ib_gid_table_entry *entry =
1315 container_of(attr, struct ib_gid_table_entry, attr);
1316
1317 put_gid_entry(entry);
1318}
1319EXPORT_SYMBOL(rdma_put_gid_attr);
1320
1321/**
1322 * rdma_hold_gid_attr - Get reference to existing GID attribute
1323 *
1324 * @attr: Pointer to the GID attribute whose reference
1325 * needs to be taken.
1326 *
1327 * Increase the reference count to a GID attribute to keep it from being
1328 * freed. Callers are required to already be holding a reference to attribute.
1329 *
1330 */
1331void rdma_hold_gid_attr(const struct ib_gid_attr *attr)
1332{
1333 struct ib_gid_table_entry *entry =
1334 container_of(attr, struct ib_gid_table_entry, attr);
1335
1336 get_gid_entry(entry);
1337}
1338EXPORT_SYMBOL(rdma_hold_gid_attr);
1339
1340/**
1341 * rdma_read_gid_attr_ndev_rcu - Read GID attribute netdevice
1342 * which must be in UP state.
1343 *
1344 * @attr:Pointer to the GID attribute
1345 *
1346 * Returns pointer to netdevice if the netdevice was attached to GID and
1347 * netdevice is in UP state. Caller must hold RCU lock as this API
1348 * reads the netdev flags which can change while netdevice migrates to
1349 * different net namespace. Returns ERR_PTR with error code otherwise.
1350 *
1351 */
1352struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr)
1353{
1354 struct ib_gid_table_entry *entry =
1355 container_of(attr, struct ib_gid_table_entry, attr);
1356 struct ib_device *device = entry->attr.device;
1357 struct net_device *ndev = ERR_PTR(-EINVAL);
1358 u32 port_num = entry->attr.port_num;
1359 struct ib_gid_table *table;
1360 unsigned long flags;
1361 bool valid;
1362
1363 table = rdma_gid_table(device, port_num);
1364
1365 read_lock_irqsave(&table->rwlock, flags);
1366 valid = is_gid_entry_valid(table->data_vec[attr->index]);
1367 if (valid) {
1368 ndev = rcu_dereference(attr->ndev);
1369 if (!ndev)
1370 ndev = ERR_PTR(-ENODEV);
1371 }
1372 read_unlock_irqrestore(&table->rwlock, flags);
1373 return ndev;
1374}
1375EXPORT_SYMBOL(rdma_read_gid_attr_ndev_rcu);
1376
1377static int get_lower_dev_vlan(struct net_device *lower_dev,
1378 struct netdev_nested_priv *priv)
1379{
1380 u16 *vlan_id = (u16 *)priv->data;
1381
1382 if (is_vlan_dev(lower_dev))
1383 *vlan_id = vlan_dev_vlan_id(lower_dev);
1384
1385 /* We are interested only in first level vlan device, so
1386 * always return 1 to stop iterating over next level devices.
1387 */
1388 return 1;
1389}
1390
1391/**
1392 * rdma_read_gid_l2_fields - Read the vlan ID and source MAC address
1393 * of a GID entry.
1394 *
1395 * @attr: GID attribute pointer whose L2 fields to be read
1396 * @vlan_id: Pointer to vlan id to fill up if the GID entry has
1397 * vlan id. It is optional.
1398 * @smac: Pointer to smac to fill up for a GID entry. It is optional.
1399 *
1400 * rdma_read_gid_l2_fields() returns 0 on success and returns vlan id
1401 * (if gid entry has vlan) and source MAC, or returns error.
1402 */
1403int rdma_read_gid_l2_fields(const struct ib_gid_attr *attr,
1404 u16 *vlan_id, u8 *smac)
1405{
1406 struct netdev_nested_priv priv = {
1407 .data = (void *)vlan_id,
1408 };
1409 struct net_device *ndev;
1410
1411 rcu_read_lock();
1412 ndev = rcu_dereference(attr->ndev);
1413 if (!ndev) {
1414 rcu_read_unlock();
1415 return -ENODEV;
1416 }
1417 if (smac)
1418 ether_addr_copy(smac, ndev->dev_addr);
1419 if (vlan_id) {
1420 *vlan_id = 0xffff;
1421 if (is_vlan_dev(ndev)) {
1422 *vlan_id = vlan_dev_vlan_id(ndev);
1423 } else {
1424 /* If the netdev is upper device and if it's lower
1425 * device is vlan device, consider vlan id of
1426 * the lower vlan device for this gid entry.
1427 */
1428 netdev_walk_all_lower_dev_rcu(attr->ndev,
1429 get_lower_dev_vlan, &priv);
1430 }
1431 }
1432 rcu_read_unlock();
1433 return 0;
1434}
1435EXPORT_SYMBOL(rdma_read_gid_l2_fields);
1436
1437static int config_non_roce_gid_cache(struct ib_device *device,
1438 u32 port, struct ib_port_attr *tprops)
1439{
1440 struct ib_gid_attr gid_attr = {};
1441 struct ib_gid_table *table;
1442 int ret = 0;
1443 int i;
1444
1445 gid_attr.device = device;
1446 gid_attr.port_num = port;
1447 table = rdma_gid_table(device, port);
1448
1449 mutex_lock(&table->lock);
1450 for (i = 0; i < tprops->gid_tbl_len; ++i) {
1451 if (!device->ops.query_gid)
1452 continue;
1453 ret = device->ops.query_gid(device, port, i, &gid_attr.gid);
1454 if (ret) {
1455 dev_warn(&device->dev,
1456 "query_gid failed (%d) for index %d\n", ret,
1457 i);
1458 goto err;
1459 }
1460
1461 if (rdma_protocol_iwarp(device, port)) {
1462 struct net_device *ndev;
1463
1464 ndev = ib_device_get_netdev(device, port);
1465 if (!ndev)
1466 continue;
1467 RCU_INIT_POINTER(gid_attr.ndev, ndev);
1468 dev_put(ndev);
1469 }
1470
1471 gid_attr.index = i;
1472 tprops->subnet_prefix =
1473 be64_to_cpu(gid_attr.gid.global.subnet_prefix);
1474 add_modify_gid(table, &gid_attr);
1475 }
1476err:
1477 mutex_unlock(&table->lock);
1478 return ret;
1479}
1480
1481static int
1482ib_cache_update(struct ib_device *device, u32 port, bool update_gids,
1483 bool update_pkeys, bool enforce_security)
1484{
1485 struct ib_port_attr *tprops = NULL;
1486 struct ib_pkey_cache *pkey_cache = NULL;
1487 struct ib_pkey_cache *old_pkey_cache = NULL;
1488 int i;
1489 int ret;
1490
1491 if (!rdma_is_port_valid(device, port))
1492 return -EINVAL;
1493
1494 tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
1495 if (!tprops)
1496 return -ENOMEM;
1497
1498 ret = ib_query_port(device, port, tprops);
1499 if (ret) {
1500 dev_warn(&device->dev, "ib_query_port failed (%d)\n", ret);
1501 goto err;
1502 }
1503
1504 if (!rdma_protocol_roce(device, port) && update_gids) {
1505 ret = config_non_roce_gid_cache(device, port,
1506 tprops);
1507 if (ret)
1508 goto err;
1509 }
1510
1511 update_pkeys &= !!tprops->pkey_tbl_len;
1512
1513 if (update_pkeys) {
1514 pkey_cache = kmalloc(struct_size(pkey_cache, table,
1515 tprops->pkey_tbl_len),
1516 GFP_KERNEL);
1517 if (!pkey_cache) {
1518 ret = -ENOMEM;
1519 goto err;
1520 }
1521
1522 pkey_cache->table_len = tprops->pkey_tbl_len;
1523
1524 for (i = 0; i < pkey_cache->table_len; ++i) {
1525 ret = ib_query_pkey(device, port, i,
1526 pkey_cache->table + i);
1527 if (ret) {
1528 dev_warn(&device->dev,
1529 "ib_query_pkey failed (%d) for index %d\n",
1530 ret, i);
1531 goto err;
1532 }
1533 }
1534 }
1535
1536 write_lock_irq(&device->cache_lock);
1537
1538 if (update_pkeys) {
1539 old_pkey_cache = device->port_data[port].cache.pkey;
1540 device->port_data[port].cache.pkey = pkey_cache;
1541 }
1542 device->port_data[port].cache.lmc = tprops->lmc;
1543 device->port_data[port].cache.port_state = tprops->state;
1544
1545 device->port_data[port].cache.subnet_prefix = tprops->subnet_prefix;
1546 write_unlock_irq(&device->cache_lock);
1547
1548 if (enforce_security)
1549 ib_security_cache_change(device,
1550 port,
1551 tprops->subnet_prefix);
1552
1553 kfree(old_pkey_cache);
1554 kfree(tprops);
1555 return 0;
1556
1557err:
1558 kfree(pkey_cache);
1559 kfree(tprops);
1560 return ret;
1561}
1562
1563static void ib_cache_event_task(struct work_struct *_work)
1564{
1565 struct ib_update_work *work =
1566 container_of(_work, struct ib_update_work, work);
1567 int ret;
1568
1569 /* Before distributing the cache update event, first sync
1570 * the cache.
1571 */
1572 ret = ib_cache_update(work->event.device, work->event.element.port_num,
1573 work->event.event == IB_EVENT_GID_CHANGE,
1574 work->event.event == IB_EVENT_PKEY_CHANGE,
1575 work->enforce_security);
1576
1577 /* GID event is notified already for individual GID entries by
1578 * dispatch_gid_change_event(). Hence, notifiy for rest of the
1579 * events.
1580 */
1581 if (!ret && work->event.event != IB_EVENT_GID_CHANGE)
1582 ib_dispatch_event_clients(&work->event);
1583
1584 kfree(work);
1585}
1586
1587static void ib_generic_event_task(struct work_struct *_work)
1588{
1589 struct ib_update_work *work =
1590 container_of(_work, struct ib_update_work, work);
1591
1592 ib_dispatch_event_clients(&work->event);
1593 kfree(work);
1594}
1595
1596static bool is_cache_update_event(const struct ib_event *event)
1597{
1598 return (event->event == IB_EVENT_PORT_ERR ||
1599 event->event == IB_EVENT_PORT_ACTIVE ||
1600 event->event == IB_EVENT_LID_CHANGE ||
1601 event->event == IB_EVENT_PKEY_CHANGE ||
1602 event->event == IB_EVENT_CLIENT_REREGISTER ||
1603 event->event == IB_EVENT_GID_CHANGE);
1604}
1605
1606/**
1607 * ib_dispatch_event - Dispatch an asynchronous event
1608 * @event:Event to dispatch
1609 *
1610 * Low-level drivers must call ib_dispatch_event() to dispatch the
1611 * event to all registered event handlers when an asynchronous event
1612 * occurs.
1613 */
1614void ib_dispatch_event(const struct ib_event *event)
1615{
1616 struct ib_update_work *work;
1617
1618 work = kzalloc(sizeof(*work), GFP_ATOMIC);
1619 if (!work)
1620 return;
1621
1622 if (is_cache_update_event(event))
1623 INIT_WORK(&work->work, ib_cache_event_task);
1624 else
1625 INIT_WORK(&work->work, ib_generic_event_task);
1626
1627 work->event = *event;
1628 if (event->event == IB_EVENT_PKEY_CHANGE ||
1629 event->event == IB_EVENT_GID_CHANGE)
1630 work->enforce_security = true;
1631
1632 queue_work(ib_wq, &work->work);
1633}
1634EXPORT_SYMBOL(ib_dispatch_event);
1635
1636int ib_cache_setup_one(struct ib_device *device)
1637{
1638 u32 p;
1639 int err;
1640
1641 err = gid_table_setup_one(device);
1642 if (err)
1643 return err;
1644
1645 rdma_for_each_port (device, p) {
1646 err = ib_cache_update(device, p, true, true, true);
1647 if (err)
1648 return err;
1649 }
1650
1651 return 0;
1652}
1653
1654void ib_cache_release_one(struct ib_device *device)
1655{
1656 u32 p;
1657
1658 /*
1659 * The release function frees all the cache elements.
1660 * This function should be called as part of freeing
1661 * all the device's resources when the cache could no
1662 * longer be accessed.
1663 */
1664 rdma_for_each_port (device, p)
1665 kfree(device->port_data[p].cache.pkey);
1666
1667 gid_table_release_one(device);
1668}
1669
1670void ib_cache_cleanup_one(struct ib_device *device)
1671{
1672 /* The cleanup function waits for all in-progress workqueue
1673 * elements and cleans up the GID cache. This function should be
1674 * called after the device was removed from the devices list and
1675 * all clients were removed, so the cache exists but is
1676 * non-functional and shouldn't be updated anymore.
1677 */
1678 flush_workqueue(ib_wq);
1679 gid_table_cleanup_one(device);
1680
1681 /*
1682 * Flush the wq second time for any pending GID delete work.
1683 */
1684 flush_workqueue(ib_wq);
1685}
1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
5 * Copyright (c) 2005 Voltaire, 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.
34 */
35
36#include <linux/module.h>
37#include <linux/errno.h>
38#include <linux/slab.h>
39#include <linux/workqueue.h>
40#include <linux/netdevice.h>
41#include <net/addrconf.h>
42
43#include <rdma/ib_cache.h>
44
45#include "core_priv.h"
46
47struct ib_pkey_cache {
48 int table_len;
49 u16 table[0];
50};
51
52struct ib_update_work {
53 struct work_struct work;
54 struct ib_device *device;
55 u8 port_num;
56};
57
58union ib_gid zgid;
59EXPORT_SYMBOL(zgid);
60
61static const struct ib_gid_attr zattr;
62
63enum gid_attr_find_mask {
64 GID_ATTR_FIND_MASK_GID = 1UL << 0,
65 GID_ATTR_FIND_MASK_NETDEV = 1UL << 1,
66 GID_ATTR_FIND_MASK_DEFAULT = 1UL << 2,
67 GID_ATTR_FIND_MASK_GID_TYPE = 1UL << 3,
68};
69
70enum gid_table_entry_props {
71 GID_TABLE_ENTRY_INVALID = 1UL << 0,
72 GID_TABLE_ENTRY_DEFAULT = 1UL << 1,
73};
74
75enum gid_table_write_action {
76 GID_TABLE_WRITE_ACTION_ADD,
77 GID_TABLE_WRITE_ACTION_DEL,
78 /* MODIFY only updates the GID table. Currently only used by
79 * ib_cache_update.
80 */
81 GID_TABLE_WRITE_ACTION_MODIFY
82};
83
84struct ib_gid_table_entry {
85 unsigned long props;
86 union ib_gid gid;
87 struct ib_gid_attr attr;
88 void *context;
89};
90
91struct ib_gid_table {
92 int sz;
93 /* In RoCE, adding a GID to the table requires:
94 * (a) Find if this GID is already exists.
95 * (b) Find a free space.
96 * (c) Write the new GID
97 *
98 * Delete requires different set of operations:
99 * (a) Find the GID
100 * (b) Delete it.
101 *
102 * Add/delete should be carried out atomically.
103 * This is done by locking this mutex from multiple
104 * writers. We don't need this lock for IB, as the MAD
105 * layer replaces all entries. All data_vec entries
106 * are locked by this lock.
107 **/
108 struct mutex lock;
109 /* This lock protects the table entries from being
110 * read and written simultaneously.
111 */
112 rwlock_t rwlock;
113 struct ib_gid_table_entry *data_vec;
114};
115
116static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port)
117{
118 if (rdma_cap_roce_gid_table(ib_dev, port)) {
119 struct ib_event event;
120
121 event.device = ib_dev;
122 event.element.port_num = port;
123 event.event = IB_EVENT_GID_CHANGE;
124
125 ib_dispatch_event(&event);
126 }
127}
128
129static const char * const gid_type_str[] = {
130 [IB_GID_TYPE_IB] = "IB/RoCE v1",
131 [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2",
132};
133
134const char *ib_cache_gid_type_str(enum ib_gid_type gid_type)
135{
136 if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type])
137 return gid_type_str[gid_type];
138
139 return "Invalid GID type";
140}
141EXPORT_SYMBOL(ib_cache_gid_type_str);
142
143int ib_cache_gid_parse_type_str(const char *buf)
144{
145 unsigned int i;
146 size_t len;
147 int err = -EINVAL;
148
149 len = strlen(buf);
150 if (len == 0)
151 return -EINVAL;
152
153 if (buf[len - 1] == '\n')
154 len--;
155
156 for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i)
157 if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) &&
158 len == strlen(gid_type_str[i])) {
159 err = i;
160 break;
161 }
162
163 return err;
164}
165EXPORT_SYMBOL(ib_cache_gid_parse_type_str);
166
167/* This function expects that rwlock will be write locked in all
168 * scenarios and that lock will be locked in sleep-able (RoCE)
169 * scenarios.
170 */
171static int write_gid(struct ib_device *ib_dev, u8 port,
172 struct ib_gid_table *table, int ix,
173 const union ib_gid *gid,
174 const struct ib_gid_attr *attr,
175 enum gid_table_write_action action,
176 bool default_gid)
177 __releases(&table->rwlock) __acquires(&table->rwlock)
178{
179 int ret = 0;
180 struct net_device *old_net_dev;
181 enum ib_gid_type old_gid_type;
182
183 /* in rdma_cap_roce_gid_table, this funciton should be protected by a
184 * sleep-able lock.
185 */
186
187 if (rdma_cap_roce_gid_table(ib_dev, port)) {
188 table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID;
189 write_unlock_irq(&table->rwlock);
190 /* GID_TABLE_WRITE_ACTION_MODIFY currently isn't supported by
191 * RoCE providers and thus only updates the cache.
192 */
193 if (action == GID_TABLE_WRITE_ACTION_ADD)
194 ret = ib_dev->add_gid(ib_dev, port, ix, gid, attr,
195 &table->data_vec[ix].context);
196 else if (action == GID_TABLE_WRITE_ACTION_DEL)
197 ret = ib_dev->del_gid(ib_dev, port, ix,
198 &table->data_vec[ix].context);
199 write_lock_irq(&table->rwlock);
200 }
201
202 old_net_dev = table->data_vec[ix].attr.ndev;
203 old_gid_type = table->data_vec[ix].attr.gid_type;
204 if (old_net_dev && old_net_dev != attr->ndev)
205 dev_put(old_net_dev);
206 /* if modify_gid failed, just delete the old gid */
207 if (ret || action == GID_TABLE_WRITE_ACTION_DEL) {
208 gid = &zgid;
209 attr = &zattr;
210 table->data_vec[ix].context = NULL;
211 }
212
213 memcpy(&table->data_vec[ix].gid, gid, sizeof(*gid));
214 memcpy(&table->data_vec[ix].attr, attr, sizeof(*attr));
215 if (default_gid) {
216 table->data_vec[ix].props |= GID_TABLE_ENTRY_DEFAULT;
217 if (action == GID_TABLE_WRITE_ACTION_DEL)
218 table->data_vec[ix].attr.gid_type = old_gid_type;
219 }
220 if (table->data_vec[ix].attr.ndev &&
221 table->data_vec[ix].attr.ndev != old_net_dev)
222 dev_hold(table->data_vec[ix].attr.ndev);
223
224 table->data_vec[ix].props &= ~GID_TABLE_ENTRY_INVALID;
225
226 return ret;
227}
228
229static int add_gid(struct ib_device *ib_dev, u8 port,
230 struct ib_gid_table *table, int ix,
231 const union ib_gid *gid,
232 const struct ib_gid_attr *attr,
233 bool default_gid) {
234 return write_gid(ib_dev, port, table, ix, gid, attr,
235 GID_TABLE_WRITE_ACTION_ADD, default_gid);
236}
237
238static int modify_gid(struct ib_device *ib_dev, u8 port,
239 struct ib_gid_table *table, int ix,
240 const union ib_gid *gid,
241 const struct ib_gid_attr *attr,
242 bool default_gid) {
243 return write_gid(ib_dev, port, table, ix, gid, attr,
244 GID_TABLE_WRITE_ACTION_MODIFY, default_gid);
245}
246
247static int del_gid(struct ib_device *ib_dev, u8 port,
248 struct ib_gid_table *table, int ix,
249 bool default_gid) {
250 return write_gid(ib_dev, port, table, ix, &zgid, &zattr,
251 GID_TABLE_WRITE_ACTION_DEL, default_gid);
252}
253
254/* rwlock should be read locked */
255static int find_gid(struct ib_gid_table *table, const union ib_gid *gid,
256 const struct ib_gid_attr *val, bool default_gid,
257 unsigned long mask, int *pempty)
258{
259 int i = 0;
260 int found = -1;
261 int empty = pempty ? -1 : 0;
262
263 while (i < table->sz && (found < 0 || empty < 0)) {
264 struct ib_gid_table_entry *data = &table->data_vec[i];
265 struct ib_gid_attr *attr = &data->attr;
266 int curr_index = i;
267
268 i++;
269
270 if (data->props & GID_TABLE_ENTRY_INVALID)
271 continue;
272
273 if (empty < 0)
274 if (!memcmp(&data->gid, &zgid, sizeof(*gid)) &&
275 !memcmp(attr, &zattr, sizeof(*attr)) &&
276 !data->props)
277 empty = curr_index;
278
279 if (found >= 0)
280 continue;
281
282 if (mask & GID_ATTR_FIND_MASK_GID_TYPE &&
283 attr->gid_type != val->gid_type)
284 continue;
285
286 if (mask & GID_ATTR_FIND_MASK_GID &&
287 memcmp(gid, &data->gid, sizeof(*gid)))
288 continue;
289
290 if (mask & GID_ATTR_FIND_MASK_NETDEV &&
291 attr->ndev != val->ndev)
292 continue;
293
294 if (mask & GID_ATTR_FIND_MASK_DEFAULT &&
295 !!(data->props & GID_TABLE_ENTRY_DEFAULT) !=
296 default_gid)
297 continue;
298
299 found = curr_index;
300 }
301
302 if (pempty)
303 *pempty = empty;
304
305 return found;
306}
307
308static void make_default_gid(struct net_device *dev, union ib_gid *gid)
309{
310 gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
311 addrconf_ifid_eui48(&gid->raw[8], dev);
312}
313
314int ib_cache_gid_add(struct ib_device *ib_dev, u8 port,
315 union ib_gid *gid, struct ib_gid_attr *attr)
316{
317 struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
318 struct ib_gid_table *table;
319 int ix;
320 int ret = 0;
321 struct net_device *idev;
322 int empty;
323
324 table = ports_table[port - rdma_start_port(ib_dev)];
325
326 if (!memcmp(gid, &zgid, sizeof(*gid)))
327 return -EINVAL;
328
329 if (ib_dev->get_netdev) {
330 idev = ib_dev->get_netdev(ib_dev, port);
331 if (idev && attr->ndev != idev) {
332 union ib_gid default_gid;
333
334 /* Adding default GIDs in not permitted */
335 make_default_gid(idev, &default_gid);
336 if (!memcmp(gid, &default_gid, sizeof(*gid))) {
337 dev_put(idev);
338 return -EPERM;
339 }
340 }
341 if (idev)
342 dev_put(idev);
343 }
344
345 mutex_lock(&table->lock);
346 write_lock_irq(&table->rwlock);
347
348 ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID |
349 GID_ATTR_FIND_MASK_GID_TYPE |
350 GID_ATTR_FIND_MASK_NETDEV, &empty);
351 if (ix >= 0)
352 goto out_unlock;
353
354 if (empty < 0) {
355 ret = -ENOSPC;
356 goto out_unlock;
357 }
358
359 ret = add_gid(ib_dev, port, table, empty, gid, attr, false);
360 if (!ret)
361 dispatch_gid_change_event(ib_dev, port);
362
363out_unlock:
364 write_unlock_irq(&table->rwlock);
365 mutex_unlock(&table->lock);
366 return ret;
367}
368
369int ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
370 union ib_gid *gid, struct ib_gid_attr *attr)
371{
372 struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
373 struct ib_gid_table *table;
374 int ix;
375
376 table = ports_table[port - rdma_start_port(ib_dev)];
377
378 mutex_lock(&table->lock);
379 write_lock_irq(&table->rwlock);
380
381 ix = find_gid(table, gid, attr, false,
382 GID_ATTR_FIND_MASK_GID |
383 GID_ATTR_FIND_MASK_GID_TYPE |
384 GID_ATTR_FIND_MASK_NETDEV |
385 GID_ATTR_FIND_MASK_DEFAULT,
386 NULL);
387 if (ix < 0)
388 goto out_unlock;
389
390 if (!del_gid(ib_dev, port, table, ix, false))
391 dispatch_gid_change_event(ib_dev, port);
392
393out_unlock:
394 write_unlock_irq(&table->rwlock);
395 mutex_unlock(&table->lock);
396 return 0;
397}
398
399int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
400 struct net_device *ndev)
401{
402 struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
403 struct ib_gid_table *table;
404 int ix;
405 bool deleted = false;
406
407 table = ports_table[port - rdma_start_port(ib_dev)];
408
409 mutex_lock(&table->lock);
410 write_lock_irq(&table->rwlock);
411
412 for (ix = 0; ix < table->sz; ix++)
413 if (table->data_vec[ix].attr.ndev == ndev)
414 if (!del_gid(ib_dev, port, table, ix,
415 !!(table->data_vec[ix].props &
416 GID_TABLE_ENTRY_DEFAULT)))
417 deleted = true;
418
419 write_unlock_irq(&table->rwlock);
420 mutex_unlock(&table->lock);
421
422 if (deleted)
423 dispatch_gid_change_event(ib_dev, port);
424
425 return 0;
426}
427
428static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index,
429 union ib_gid *gid, struct ib_gid_attr *attr)
430{
431 struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
432 struct ib_gid_table *table;
433
434 table = ports_table[port - rdma_start_port(ib_dev)];
435
436 if (index < 0 || index >= table->sz)
437 return -EINVAL;
438
439 if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID)
440 return -EAGAIN;
441
442 memcpy(gid, &table->data_vec[index].gid, sizeof(*gid));
443 if (attr) {
444 memcpy(attr, &table->data_vec[index].attr, sizeof(*attr));
445 if (attr->ndev)
446 dev_hold(attr->ndev);
447 }
448
449 return 0;
450}
451
452static int _ib_cache_gid_table_find(struct ib_device *ib_dev,
453 const union ib_gid *gid,
454 const struct ib_gid_attr *val,
455 unsigned long mask,
456 u8 *port, u16 *index)
457{
458 struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
459 struct ib_gid_table *table;
460 u8 p;
461 int local_index;
462 unsigned long flags;
463
464 for (p = 0; p < ib_dev->phys_port_cnt; p++) {
465 table = ports_table[p];
466 read_lock_irqsave(&table->rwlock, flags);
467 local_index = find_gid(table, gid, val, false, mask, NULL);
468 if (local_index >= 0) {
469 if (index)
470 *index = local_index;
471 if (port)
472 *port = p + rdma_start_port(ib_dev);
473 read_unlock_irqrestore(&table->rwlock, flags);
474 return 0;
475 }
476 read_unlock_irqrestore(&table->rwlock, flags);
477 }
478
479 return -ENOENT;
480}
481
482static int ib_cache_gid_find(struct ib_device *ib_dev,
483 const union ib_gid *gid,
484 enum ib_gid_type gid_type,
485 struct net_device *ndev, u8 *port,
486 u16 *index)
487{
488 unsigned long mask = GID_ATTR_FIND_MASK_GID |
489 GID_ATTR_FIND_MASK_GID_TYPE;
490 struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type};
491
492 if (ndev)
493 mask |= GID_ATTR_FIND_MASK_NETDEV;
494
495 return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val,
496 mask, port, index);
497}
498
499int ib_find_cached_gid_by_port(struct ib_device *ib_dev,
500 const union ib_gid *gid,
501 enum ib_gid_type gid_type,
502 u8 port, struct net_device *ndev,
503 u16 *index)
504{
505 int local_index;
506 struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
507 struct ib_gid_table *table;
508 unsigned long mask = GID_ATTR_FIND_MASK_GID |
509 GID_ATTR_FIND_MASK_GID_TYPE;
510 struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type};
511 unsigned long flags;
512
513 if (port < rdma_start_port(ib_dev) ||
514 port > rdma_end_port(ib_dev))
515 return -ENOENT;
516
517 table = ports_table[port - rdma_start_port(ib_dev)];
518
519 if (ndev)
520 mask |= GID_ATTR_FIND_MASK_NETDEV;
521
522 read_lock_irqsave(&table->rwlock, flags);
523 local_index = find_gid(table, gid, &val, false, mask, NULL);
524 if (local_index >= 0) {
525 if (index)
526 *index = local_index;
527 read_unlock_irqrestore(&table->rwlock, flags);
528 return 0;
529 }
530
531 read_unlock_irqrestore(&table->rwlock, flags);
532 return -ENOENT;
533}
534EXPORT_SYMBOL(ib_find_cached_gid_by_port);
535
536/**
537 * ib_find_gid_by_filter - Returns the GID table index where a specified
538 * GID value occurs
539 * @device: The device to query.
540 * @gid: The GID value to search for.
541 * @port_num: The port number of the device where the GID value could be
542 * searched.
543 * @filter: The filter function is executed on any matching GID in the table.
544 * If the filter function returns true, the corresponding index is returned,
545 * otherwise, we continue searching the GID table. It's guaranteed that
546 * while filter is executed, ndev field is valid and the structure won't
547 * change. filter is executed in an atomic context. filter must not be NULL.
548 * @index: The index into the cached GID table where the GID was found. This
549 * parameter may be NULL.
550 *
551 * ib_cache_gid_find_by_filter() searches for the specified GID value
552 * of which the filter function returns true in the port's GID table.
553 * This function is only supported on RoCE ports.
554 *
555 */
556static int ib_cache_gid_find_by_filter(struct ib_device *ib_dev,
557 const union ib_gid *gid,
558 u8 port,
559 bool (*filter)(const union ib_gid *,
560 const struct ib_gid_attr *,
561 void *),
562 void *context,
563 u16 *index)
564{
565 struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
566 struct ib_gid_table *table;
567 unsigned int i;
568 unsigned long flags;
569 bool found = false;
570
571 if (!ports_table)
572 return -EOPNOTSUPP;
573
574 if (port < rdma_start_port(ib_dev) ||
575 port > rdma_end_port(ib_dev) ||
576 !rdma_protocol_roce(ib_dev, port))
577 return -EPROTONOSUPPORT;
578
579 table = ports_table[port - rdma_start_port(ib_dev)];
580
581 read_lock_irqsave(&table->rwlock, flags);
582 for (i = 0; i < table->sz; i++) {
583 struct ib_gid_attr attr;
584
585 if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID)
586 goto next;
587
588 if (memcmp(gid, &table->data_vec[i].gid, sizeof(*gid)))
589 goto next;
590
591 memcpy(&attr, &table->data_vec[i].attr, sizeof(attr));
592
593 if (filter(gid, &attr, context))
594 found = true;
595
596next:
597 if (found)
598 break;
599 }
600 read_unlock_irqrestore(&table->rwlock, flags);
601
602 if (!found)
603 return -ENOENT;
604
605 if (index)
606 *index = i;
607 return 0;
608}
609
610static struct ib_gid_table *alloc_gid_table(int sz)
611{
612 struct ib_gid_table *table =
613 kzalloc(sizeof(struct ib_gid_table), GFP_KERNEL);
614
615 if (!table)
616 return NULL;
617
618 table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL);
619 if (!table->data_vec)
620 goto err_free_table;
621
622 mutex_init(&table->lock);
623
624 table->sz = sz;
625 rwlock_init(&table->rwlock);
626
627 return table;
628
629err_free_table:
630 kfree(table);
631 return NULL;
632}
633
634static void release_gid_table(struct ib_gid_table *table)
635{
636 if (table) {
637 kfree(table->data_vec);
638 kfree(table);
639 }
640}
641
642static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port,
643 struct ib_gid_table *table)
644{
645 int i;
646 bool deleted = false;
647
648 if (!table)
649 return;
650
651 write_lock_irq(&table->rwlock);
652 for (i = 0; i < table->sz; ++i) {
653 if (memcmp(&table->data_vec[i].gid, &zgid,
654 sizeof(table->data_vec[i].gid)))
655 if (!del_gid(ib_dev, port, table, i,
656 table->data_vec[i].props &
657 GID_ATTR_FIND_MASK_DEFAULT))
658 deleted = true;
659 }
660 write_unlock_irq(&table->rwlock);
661
662 if (deleted)
663 dispatch_gid_change_event(ib_dev, port);
664}
665
666void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port,
667 struct net_device *ndev,
668 unsigned long gid_type_mask,
669 enum ib_cache_gid_default_mode mode)
670{
671 struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
672 union ib_gid gid;
673 struct ib_gid_attr gid_attr;
674 struct ib_gid_attr zattr_type = zattr;
675 struct ib_gid_table *table;
676 unsigned int gid_type;
677
678 table = ports_table[port - rdma_start_port(ib_dev)];
679
680 make_default_gid(ndev, &gid);
681 memset(&gid_attr, 0, sizeof(gid_attr));
682 gid_attr.ndev = ndev;
683
684 for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) {
685 int ix;
686 union ib_gid current_gid;
687 struct ib_gid_attr current_gid_attr = {};
688
689 if (1UL << gid_type & ~gid_type_mask)
690 continue;
691
692 gid_attr.gid_type = gid_type;
693
694 mutex_lock(&table->lock);
695 write_lock_irq(&table->rwlock);
696 ix = find_gid(table, NULL, &gid_attr, true,
697 GID_ATTR_FIND_MASK_GID_TYPE |
698 GID_ATTR_FIND_MASK_DEFAULT,
699 NULL);
700
701 /* Coudn't find default GID location */
702 if (WARN_ON(ix < 0))
703 goto release;
704
705 zattr_type.gid_type = gid_type;
706
707 if (!__ib_cache_gid_get(ib_dev, port, ix,
708 ¤t_gid, ¤t_gid_attr) &&
709 mode == IB_CACHE_GID_DEFAULT_MODE_SET &&
710 !memcmp(&gid, ¤t_gid, sizeof(gid)) &&
711 !memcmp(&gid_attr, ¤t_gid_attr, sizeof(gid_attr)))
712 goto release;
713
714 if (memcmp(¤t_gid, &zgid, sizeof(current_gid)) ||
715 memcmp(¤t_gid_attr, &zattr_type,
716 sizeof(current_gid_attr))) {
717 if (del_gid(ib_dev, port, table, ix, true)) {
718 pr_warn("ib_cache_gid: can't delete index %d for default gid %pI6\n",
719 ix, gid.raw);
720 goto release;
721 } else {
722 dispatch_gid_change_event(ib_dev, port);
723 }
724 }
725
726 if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) {
727 if (add_gid(ib_dev, port, table, ix, &gid, &gid_attr, true))
728 pr_warn("ib_cache_gid: unable to add default gid %pI6\n",
729 gid.raw);
730 else
731 dispatch_gid_change_event(ib_dev, port);
732 }
733
734release:
735 if (current_gid_attr.ndev)
736 dev_put(current_gid_attr.ndev);
737 write_unlock_irq(&table->rwlock);
738 mutex_unlock(&table->lock);
739 }
740}
741
742static int gid_table_reserve_default(struct ib_device *ib_dev, u8 port,
743 struct ib_gid_table *table)
744{
745 unsigned int i;
746 unsigned long roce_gid_type_mask;
747 unsigned int num_default_gids;
748 unsigned int current_gid = 0;
749
750 roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
751 num_default_gids = hweight_long(roce_gid_type_mask);
752 for (i = 0; i < num_default_gids && i < table->sz; i++) {
753 struct ib_gid_table_entry *entry =
754 &table->data_vec[i];
755
756 entry->props |= GID_TABLE_ENTRY_DEFAULT;
757 current_gid = find_next_bit(&roce_gid_type_mask,
758 BITS_PER_LONG,
759 current_gid);
760 entry->attr.gid_type = current_gid++;
761 }
762
763 return 0;
764}
765
766static int _gid_table_setup_one(struct ib_device *ib_dev)
767{
768 u8 port;
769 struct ib_gid_table **table;
770 int err = 0;
771
772 table = kcalloc(ib_dev->phys_port_cnt, sizeof(*table), GFP_KERNEL);
773 if (!table)
774 return -ENOMEM;
775
776 for (port = 0; port < ib_dev->phys_port_cnt; port++) {
777 u8 rdma_port = port + rdma_start_port(ib_dev);
778
779 table[port] =
780 alloc_gid_table(
781 ib_dev->port_immutable[rdma_port].gid_tbl_len);
782 if (!table[port]) {
783 err = -ENOMEM;
784 goto rollback_table_setup;
785 }
786
787 err = gid_table_reserve_default(ib_dev,
788 port + rdma_start_port(ib_dev),
789 table[port]);
790 if (err)
791 goto rollback_table_setup;
792 }
793
794 ib_dev->cache.gid_cache = table;
795 return 0;
796
797rollback_table_setup:
798 for (port = 0; port < ib_dev->phys_port_cnt; port++) {
799 cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev),
800 table[port]);
801 release_gid_table(table[port]);
802 }
803
804 kfree(table);
805 return err;
806}
807
808static void gid_table_release_one(struct ib_device *ib_dev)
809{
810 struct ib_gid_table **table = ib_dev->cache.gid_cache;
811 u8 port;
812
813 if (!table)
814 return;
815
816 for (port = 0; port < ib_dev->phys_port_cnt; port++)
817 release_gid_table(table[port]);
818
819 kfree(table);
820 ib_dev->cache.gid_cache = NULL;
821}
822
823static void gid_table_cleanup_one(struct ib_device *ib_dev)
824{
825 struct ib_gid_table **table = ib_dev->cache.gid_cache;
826 u8 port;
827
828 if (!table)
829 return;
830
831 for (port = 0; port < ib_dev->phys_port_cnt; port++)
832 cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev),
833 table[port]);
834}
835
836static int gid_table_setup_one(struct ib_device *ib_dev)
837{
838 int err;
839
840 err = _gid_table_setup_one(ib_dev);
841
842 if (err)
843 return err;
844
845 err = roce_rescan_device(ib_dev);
846
847 if (err) {
848 gid_table_cleanup_one(ib_dev);
849 gid_table_release_one(ib_dev);
850 }
851
852 return err;
853}
854
855int ib_get_cached_gid(struct ib_device *device,
856 u8 port_num,
857 int index,
858 union ib_gid *gid,
859 struct ib_gid_attr *gid_attr)
860{
861 int res;
862 unsigned long flags;
863 struct ib_gid_table **ports_table = device->cache.gid_cache;
864 struct ib_gid_table *table = ports_table[port_num - rdma_start_port(device)];
865
866 if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
867 return -EINVAL;
868
869 read_lock_irqsave(&table->rwlock, flags);
870 res = __ib_cache_gid_get(device, port_num, index, gid, gid_attr);
871 read_unlock_irqrestore(&table->rwlock, flags);
872
873 return res;
874}
875EXPORT_SYMBOL(ib_get_cached_gid);
876
877int ib_find_cached_gid(struct ib_device *device,
878 const union ib_gid *gid,
879 enum ib_gid_type gid_type,
880 struct net_device *ndev,
881 u8 *port_num,
882 u16 *index)
883{
884 return ib_cache_gid_find(device, gid, gid_type, ndev, port_num, index);
885}
886EXPORT_SYMBOL(ib_find_cached_gid);
887
888int ib_find_gid_by_filter(struct ib_device *device,
889 const union ib_gid *gid,
890 u8 port_num,
891 bool (*filter)(const union ib_gid *gid,
892 const struct ib_gid_attr *,
893 void *),
894 void *context, u16 *index)
895{
896 /* Only RoCE GID table supports filter function */
897 if (!rdma_cap_roce_gid_table(device, port_num) && filter)
898 return -EPROTONOSUPPORT;
899
900 return ib_cache_gid_find_by_filter(device, gid,
901 port_num, filter,
902 context, index);
903}
904EXPORT_SYMBOL(ib_find_gid_by_filter);
905
906int ib_get_cached_pkey(struct ib_device *device,
907 u8 port_num,
908 int index,
909 u16 *pkey)
910{
911 struct ib_pkey_cache *cache;
912 unsigned long flags;
913 int ret = 0;
914
915 if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
916 return -EINVAL;
917
918 read_lock_irqsave(&device->cache.lock, flags);
919
920 cache = device->cache.pkey_cache[port_num - rdma_start_port(device)];
921
922 if (index < 0 || index >= cache->table_len)
923 ret = -EINVAL;
924 else
925 *pkey = cache->table[index];
926
927 read_unlock_irqrestore(&device->cache.lock, flags);
928
929 return ret;
930}
931EXPORT_SYMBOL(ib_get_cached_pkey);
932
933int ib_find_cached_pkey(struct ib_device *device,
934 u8 port_num,
935 u16 pkey,
936 u16 *index)
937{
938 struct ib_pkey_cache *cache;
939 unsigned long flags;
940 int i;
941 int ret = -ENOENT;
942 int partial_ix = -1;
943
944 if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
945 return -EINVAL;
946
947 read_lock_irqsave(&device->cache.lock, flags);
948
949 cache = device->cache.pkey_cache[port_num - rdma_start_port(device)];
950
951 *index = -1;
952
953 for (i = 0; i < cache->table_len; ++i)
954 if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) {
955 if (cache->table[i] & 0x8000) {
956 *index = i;
957 ret = 0;
958 break;
959 } else
960 partial_ix = i;
961 }
962
963 if (ret && partial_ix >= 0) {
964 *index = partial_ix;
965 ret = 0;
966 }
967
968 read_unlock_irqrestore(&device->cache.lock, flags);
969
970 return ret;
971}
972EXPORT_SYMBOL(ib_find_cached_pkey);
973
974int ib_find_exact_cached_pkey(struct ib_device *device,
975 u8 port_num,
976 u16 pkey,
977 u16 *index)
978{
979 struct ib_pkey_cache *cache;
980 unsigned long flags;
981 int i;
982 int ret = -ENOENT;
983
984 if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
985 return -EINVAL;
986
987 read_lock_irqsave(&device->cache.lock, flags);
988
989 cache = device->cache.pkey_cache[port_num - rdma_start_port(device)];
990
991 *index = -1;
992
993 for (i = 0; i < cache->table_len; ++i)
994 if (cache->table[i] == pkey) {
995 *index = i;
996 ret = 0;
997 break;
998 }
999
1000 read_unlock_irqrestore(&device->cache.lock, flags);
1001
1002 return ret;
1003}
1004EXPORT_SYMBOL(ib_find_exact_cached_pkey);
1005
1006int ib_get_cached_lmc(struct ib_device *device,
1007 u8 port_num,
1008 u8 *lmc)
1009{
1010 unsigned long flags;
1011 int ret = 0;
1012
1013 if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
1014 return -EINVAL;
1015
1016 read_lock_irqsave(&device->cache.lock, flags);
1017 *lmc = device->cache.lmc_cache[port_num - rdma_start_port(device)];
1018 read_unlock_irqrestore(&device->cache.lock, flags);
1019
1020 return ret;
1021}
1022EXPORT_SYMBOL(ib_get_cached_lmc);
1023
1024static void ib_cache_update(struct ib_device *device,
1025 u8 port)
1026{
1027 struct ib_port_attr *tprops = NULL;
1028 struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache;
1029 struct ib_gid_cache {
1030 int table_len;
1031 union ib_gid table[0];
1032 } *gid_cache = NULL;
1033 int i;
1034 int ret;
1035 struct ib_gid_table *table;
1036 struct ib_gid_table **ports_table = device->cache.gid_cache;
1037 bool use_roce_gid_table =
1038 rdma_cap_roce_gid_table(device, port);
1039
1040 if (port < rdma_start_port(device) || port > rdma_end_port(device))
1041 return;
1042
1043 table = ports_table[port - rdma_start_port(device)];
1044
1045 tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
1046 if (!tprops)
1047 return;
1048
1049 ret = ib_query_port(device, port, tprops);
1050 if (ret) {
1051 pr_warn("ib_query_port failed (%d) for %s\n",
1052 ret, device->name);
1053 goto err;
1054 }
1055
1056 pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len *
1057 sizeof *pkey_cache->table, GFP_KERNEL);
1058 if (!pkey_cache)
1059 goto err;
1060
1061 pkey_cache->table_len = tprops->pkey_tbl_len;
1062
1063 if (!use_roce_gid_table) {
1064 gid_cache = kmalloc(sizeof(*gid_cache) + tprops->gid_tbl_len *
1065 sizeof(*gid_cache->table), GFP_KERNEL);
1066 if (!gid_cache)
1067 goto err;
1068
1069 gid_cache->table_len = tprops->gid_tbl_len;
1070 }
1071
1072 for (i = 0; i < pkey_cache->table_len; ++i) {
1073 ret = ib_query_pkey(device, port, i, pkey_cache->table + i);
1074 if (ret) {
1075 pr_warn("ib_query_pkey failed (%d) for %s (index %d)\n",
1076 ret, device->name, i);
1077 goto err;
1078 }
1079 }
1080
1081 if (!use_roce_gid_table) {
1082 for (i = 0; i < gid_cache->table_len; ++i) {
1083 ret = ib_query_gid(device, port, i,
1084 gid_cache->table + i, NULL);
1085 if (ret) {
1086 pr_warn("ib_query_gid failed (%d) for %s (index %d)\n",
1087 ret, device->name, i);
1088 goto err;
1089 }
1090 }
1091 }
1092
1093 write_lock_irq(&device->cache.lock);
1094
1095 old_pkey_cache = device->cache.pkey_cache[port - rdma_start_port(device)];
1096
1097 device->cache.pkey_cache[port - rdma_start_port(device)] = pkey_cache;
1098 if (!use_roce_gid_table) {
1099 write_lock(&table->rwlock);
1100 for (i = 0; i < gid_cache->table_len; i++) {
1101 modify_gid(device, port, table, i, gid_cache->table + i,
1102 &zattr, false);
1103 }
1104 write_unlock(&table->rwlock);
1105 }
1106
1107 device->cache.lmc_cache[port - rdma_start_port(device)] = tprops->lmc;
1108
1109 write_unlock_irq(&device->cache.lock);
1110
1111 kfree(gid_cache);
1112 kfree(old_pkey_cache);
1113 kfree(tprops);
1114 return;
1115
1116err:
1117 kfree(pkey_cache);
1118 kfree(gid_cache);
1119 kfree(tprops);
1120}
1121
1122static void ib_cache_task(struct work_struct *_work)
1123{
1124 struct ib_update_work *work =
1125 container_of(_work, struct ib_update_work, work);
1126
1127 ib_cache_update(work->device, work->port_num);
1128 kfree(work);
1129}
1130
1131static void ib_cache_event(struct ib_event_handler *handler,
1132 struct ib_event *event)
1133{
1134 struct ib_update_work *work;
1135
1136 if (event->event == IB_EVENT_PORT_ERR ||
1137 event->event == IB_EVENT_PORT_ACTIVE ||
1138 event->event == IB_EVENT_LID_CHANGE ||
1139 event->event == IB_EVENT_PKEY_CHANGE ||
1140 event->event == IB_EVENT_SM_CHANGE ||
1141 event->event == IB_EVENT_CLIENT_REREGISTER ||
1142 event->event == IB_EVENT_GID_CHANGE) {
1143 work = kmalloc(sizeof *work, GFP_ATOMIC);
1144 if (work) {
1145 INIT_WORK(&work->work, ib_cache_task);
1146 work->device = event->device;
1147 work->port_num = event->element.port_num;
1148 queue_work(ib_wq, &work->work);
1149 }
1150 }
1151}
1152
1153int ib_cache_setup_one(struct ib_device *device)
1154{
1155 int p;
1156 int err;
1157
1158 rwlock_init(&device->cache.lock);
1159
1160 device->cache.pkey_cache =
1161 kzalloc(sizeof *device->cache.pkey_cache *
1162 (rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL);
1163 device->cache.lmc_cache = kmalloc(sizeof *device->cache.lmc_cache *
1164 (rdma_end_port(device) -
1165 rdma_start_port(device) + 1),
1166 GFP_KERNEL);
1167 if (!device->cache.pkey_cache ||
1168 !device->cache.lmc_cache) {
1169 err = -ENOMEM;
1170 goto free;
1171 }
1172
1173 err = gid_table_setup_one(device);
1174 if (err)
1175 goto free;
1176
1177 for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p)
1178 ib_cache_update(device, p + rdma_start_port(device));
1179
1180 INIT_IB_EVENT_HANDLER(&device->cache.event_handler,
1181 device, ib_cache_event);
1182 err = ib_register_event_handler(&device->cache.event_handler);
1183 if (err)
1184 goto err;
1185
1186 return 0;
1187
1188err:
1189 gid_table_cleanup_one(device);
1190free:
1191 kfree(device->cache.pkey_cache);
1192 kfree(device->cache.lmc_cache);
1193 return err;
1194}
1195
1196void ib_cache_release_one(struct ib_device *device)
1197{
1198 int p;
1199
1200 /*
1201 * The release function frees all the cache elements.
1202 * This function should be called as part of freeing
1203 * all the device's resources when the cache could no
1204 * longer be accessed.
1205 */
1206 if (device->cache.pkey_cache)
1207 for (p = 0;
1208 p <= rdma_end_port(device) - rdma_start_port(device); ++p)
1209 kfree(device->cache.pkey_cache[p]);
1210
1211 gid_table_release_one(device);
1212 kfree(device->cache.pkey_cache);
1213 kfree(device->cache.lmc_cache);
1214}
1215
1216void ib_cache_cleanup_one(struct ib_device *device)
1217{
1218 /* The cleanup function unregisters the event handler,
1219 * waits for all in-progress workqueue elements and cleans
1220 * up the GID cache. This function should be called after
1221 * the device was removed from the devices list and all
1222 * clients were removed, so the cache exists but is
1223 * non-functional and shouldn't be updated anymore.
1224 */
1225 ib_unregister_event_handler(&device->cache.event_handler);
1226 flush_workqueue(ib_wq);
1227 gid_table_cleanup_one(device);
1228}
1229
1230void __init ib_cache_setup(void)
1231{
1232 roce_gid_mgmt_init();
1233}
1234
1235void __exit ib_cache_cleanup(void)
1236{
1237 roce_gid_mgmt_cleanup();
1238}