Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. | |
2a1d9b7f RD |
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. | |
1da177e4 LT |
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. | |
1da177e4 LT |
34 | */ |
35 | ||
1da177e4 LT |
36 | #include <linux/module.h> |
37 | #include <linux/errno.h> | |
38 | #include <linux/slab.h> | |
e8edc6e0 | 39 | #include <linux/workqueue.h> |
03db3a2d MB |
40 | #include <linux/netdevice.h> |
41 | #include <net/addrconf.h> | |
1da177e4 | 42 | |
a4d61e84 | 43 | #include <rdma/ib_cache.h> |
1da177e4 LT |
44 | |
45 | #include "core_priv.h" | |
46 | ||
47 | struct ib_pkey_cache { | |
48 | int table_len; | |
49 | u16 table[0]; | |
50 | }; | |
51 | ||
1da177e4 LT |
52 | struct ib_update_work { |
53 | struct work_struct work; | |
54 | struct ib_device *device; | |
55 | u8 port_num; | |
d291f1a6 | 56 | bool enforce_security; |
1da177e4 LT |
57 | }; |
58 | ||
e26be1bf MS |
59 | union ib_gid zgid; |
60 | EXPORT_SYMBOL(zgid); | |
03db3a2d | 61 | |
03db3a2d MB |
62 | enum gid_attr_find_mask { |
63 | GID_ATTR_FIND_MASK_GID = 1UL << 0, | |
64 | GID_ATTR_FIND_MASK_NETDEV = 1UL << 1, | |
65 | GID_ATTR_FIND_MASK_DEFAULT = 1UL << 2, | |
b39ffa1d | 66 | GID_ATTR_FIND_MASK_GID_TYPE = 1UL << 3, |
03db3a2d MB |
67 | }; |
68 | ||
b150c386 PP |
69 | enum gid_table_entry_state { |
70 | GID_TABLE_ENTRY_INVALID = 1, | |
71 | GID_TABLE_ENTRY_VALID = 2, | |
72 | /* | |
73 | * Indicates that entry is pending to be removed, there may | |
74 | * be active users of this GID entry. | |
75 | * When last user of the GID entry releases reference to it, | |
76 | * GID entry is detached from the table. | |
77 | */ | |
78 | GID_TABLE_ENTRY_PENDING_DEL = 3, | |
03db3a2d MB |
79 | }; |
80 | ||
943bd984 PP |
81 | struct roce_gid_ndev_storage { |
82 | struct rcu_head rcu_head; | |
83 | struct net_device *ndev; | |
84 | }; | |
85 | ||
03db3a2d | 86 | struct ib_gid_table_entry { |
b150c386 PP |
87 | struct kref kref; |
88 | struct work_struct del_work; | |
89 | struct ib_gid_attr attr; | |
90 | void *context; | |
943bd984 PP |
91 | /* Store the ndev pointer to release reference later on in |
92 | * call_rcu context because by that time gid_table_entry | |
93 | * and attr might be already freed. So keep a copy of it. | |
94 | * ndev_storage is freed by rcu callback. | |
95 | */ | |
96 | struct roce_gid_ndev_storage *ndev_storage; | |
b150c386 | 97 | enum gid_table_entry_state state; |
03db3a2d MB |
98 | }; |
99 | ||
100 | struct ib_gid_table { | |
1c36cf91 | 101 | int sz; |
03db3a2d MB |
102 | /* In RoCE, adding a GID to the table requires: |
103 | * (a) Find if this GID is already exists. | |
104 | * (b) Find a free space. | |
105 | * (c) Write the new GID | |
106 | * | |
107 | * Delete requires different set of operations: | |
108 | * (a) Find the GID | |
109 | * (b) Delete it. | |
110 | * | |
03db3a2d | 111 | **/ |
598ff6ba | 112 | /* Any writer to data_vec must hold this lock and the write side of |
b150c386 | 113 | * rwlock. Readers must hold only rwlock. All writers must be in a |
598ff6ba | 114 | * sleepable context. |
9c584f04 | 115 | */ |
1c36cf91 | 116 | struct mutex lock; |
b150c386 PP |
117 | /* rwlock protects data_vec[ix]->state and entry pointer. |
118 | */ | |
1c36cf91 | 119 | rwlock_t rwlock; |
b150c386 | 120 | struct ib_gid_table_entry **data_vec; |
1c36cf91 PP |
121 | /* bit field, each bit indicates the index of default GID */ |
122 | u32 default_gid_indices; | |
03db3a2d MB |
123 | }; |
124 | ||
f3906bd3 MB |
125 | static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port) |
126 | { | |
3401857e | 127 | struct ib_event event; |
f3906bd3 | 128 | |
3401857e PP |
129 | event.device = ib_dev; |
130 | event.element.port_num = port; | |
131 | event.event = IB_EVENT_GID_CHANGE; | |
f3906bd3 | 132 | |
3401857e | 133 | ib_dispatch_event(&event); |
f3906bd3 MB |
134 | } |
135 | ||
b39ffa1d MB |
136 | static const char * const gid_type_str[] = { |
137 | [IB_GID_TYPE_IB] = "IB/RoCE v1", | |
7766a99f | 138 | [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2", |
b39ffa1d MB |
139 | }; |
140 | ||
141 | const char *ib_cache_gid_type_str(enum ib_gid_type gid_type) | |
142 | { | |
143 | if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type]) | |
144 | return gid_type_str[gid_type]; | |
145 | ||
146 | return "Invalid GID type"; | |
147 | } | |
148 | EXPORT_SYMBOL(ib_cache_gid_type_str); | |
149 | ||
25e62655 PP |
150 | /** rdma_is_zero_gid - Check if given GID is zero or not. |
151 | * @gid: GID to check | |
152 | * Returns true if given GID is zero, returns false otherwise. | |
153 | */ | |
154 | bool rdma_is_zero_gid(const union ib_gid *gid) | |
155 | { | |
156 | return !memcmp(gid, &zgid, sizeof(*gid)); | |
157 | } | |
158 | EXPORT_SYMBOL(rdma_is_zero_gid); | |
159 | ||
1c36cf91 PP |
160 | /** is_gid_index_default - Check if a given index belongs to |
161 | * reserved default GIDs or not. | |
162 | * @table: GID table pointer | |
163 | * @index: Index to check in GID table | |
164 | * Returns true if index is one of the reserved default GID index otherwise | |
165 | * returns false. | |
166 | */ | |
167 | static bool is_gid_index_default(const struct ib_gid_table *table, | |
168 | unsigned int index) | |
169 | { | |
170 | return index < 32 && (BIT(index) & table->default_gid_indices); | |
171 | } | |
172 | ||
045959db MB |
173 | int ib_cache_gid_parse_type_str(const char *buf) |
174 | { | |
175 | unsigned int i; | |
176 | size_t len; | |
177 | int err = -EINVAL; | |
178 | ||
179 | len = strlen(buf); | |
180 | if (len == 0) | |
181 | return -EINVAL; | |
182 | ||
183 | if (buf[len - 1] == '\n') | |
184 | len--; | |
185 | ||
186 | for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i) | |
187 | if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) && | |
188 | len == strlen(gid_type_str[i])) { | |
189 | err = i; | |
190 | break; | |
191 | } | |
192 | ||
193 | return err; | |
194 | } | |
195 | EXPORT_SYMBOL(ib_cache_gid_parse_type_str); | |
196 | ||
724631a9 PP |
197 | static struct ib_gid_table *rdma_gid_table(struct ib_device *device, u8 port) |
198 | { | |
8faea9fd | 199 | return device->port_data[port].cache.gid; |
724631a9 PP |
200 | } |
201 | ||
b150c386 PP |
202 | static bool is_gid_entry_free(const struct ib_gid_table_entry *entry) |
203 | { | |
204 | return !entry; | |
205 | } | |
206 | ||
207 | static bool is_gid_entry_valid(const struct ib_gid_table_entry *entry) | |
208 | { | |
209 | return entry && entry->state == GID_TABLE_ENTRY_VALID; | |
210 | } | |
211 | ||
212 | static void schedule_free_gid(struct kref *kref) | |
213 | { | |
214 | struct ib_gid_table_entry *entry = | |
215 | container_of(kref, struct ib_gid_table_entry, kref); | |
216 | ||
217 | queue_work(ib_wq, &entry->del_work); | |
218 | } | |
219 | ||
943bd984 PP |
220 | static void put_gid_ndev(struct rcu_head *head) |
221 | { | |
222 | struct roce_gid_ndev_storage *storage = | |
223 | container_of(head, struct roce_gid_ndev_storage, rcu_head); | |
224 | ||
225 | WARN_ON(!storage->ndev); | |
226 | /* At this point its safe to release netdev reference, | |
227 | * as all callers working on gid_attr->ndev are done | |
228 | * using this netdev. | |
229 | */ | |
230 | dev_put(storage->ndev); | |
231 | kfree(storage); | |
232 | } | |
233 | ||
59d40813 | 234 | static void free_gid_entry_locked(struct ib_gid_table_entry *entry) |
1da177e4 | 235 | { |
b150c386 PP |
236 | struct ib_device *device = entry->attr.device; |
237 | u8 port_num = entry->attr.port_num; | |
238 | struct ib_gid_table *table = rdma_gid_table(device, port_num); | |
239 | ||
43c7c851 JG |
240 | dev_dbg(&device->dev, "%s port=%d index=%d gid %pI6\n", __func__, |
241 | port_num, entry->attr.index, entry->attr.gid.raw); | |
b150c386 | 242 | |
b150c386 | 243 | write_lock_irq(&table->rwlock); |
598ff6ba | 244 | |
b150c386 PP |
245 | /* |
246 | * The only way to avoid overwriting NULL in table is | |
247 | * by comparing if it is same entry in table or not! | |
248 | * If new entry in table is added by the time we free here, | |
249 | * don't overwrite the table entry. | |
250 | */ | |
251 | if (entry == table->data_vec[entry->attr.index]) | |
252 | table->data_vec[entry->attr.index] = NULL; | |
253 | /* Now this index is ready to be allocated */ | |
254 | write_unlock_irq(&table->rwlock); | |
b150c386 | 255 | |
943bd984 PP |
256 | if (entry->ndev_storage) |
257 | call_rcu(&entry->ndev_storage->rcu_head, put_gid_ndev); | |
b150c386 PP |
258 | kfree(entry); |
259 | } | |
260 | ||
59d40813 PP |
261 | static void free_gid_entry(struct kref *kref) |
262 | { | |
263 | struct ib_gid_table_entry *entry = | |
264 | container_of(kref, struct ib_gid_table_entry, kref); | |
265 | ||
266 | free_gid_entry_locked(entry); | |
267 | } | |
268 | ||
b150c386 PP |
269 | /** |
270 | * free_gid_work - Release reference to the GID entry | |
271 | * @work: Work structure to refer to GID entry which needs to be | |
272 | * deleted. | |
273 | * | |
274 | * free_gid_work() frees the entry from the HCA's hardware table | |
275 | * if provider supports it. It releases reference to netdevice. | |
276 | */ | |
277 | static void free_gid_work(struct work_struct *work) | |
278 | { | |
279 | struct ib_gid_table_entry *entry = | |
280 | container_of(work, struct ib_gid_table_entry, del_work); | |
59d40813 PP |
281 | struct ib_device *device = entry->attr.device; |
282 | u8 port_num = entry->attr.port_num; | |
283 | struct ib_gid_table *table = rdma_gid_table(device, port_num); | |
284 | ||
285 | mutex_lock(&table->lock); | |
286 | free_gid_entry_locked(entry); | |
287 | mutex_unlock(&table->lock); | |
598ff6ba | 288 | } |
03db3a2d | 289 | |
b150c386 PP |
290 | static struct ib_gid_table_entry * |
291 | alloc_gid_entry(const struct ib_gid_attr *attr) | |
598ff6ba PP |
292 | { |
293 | struct ib_gid_table_entry *entry; | |
943bd984 | 294 | struct net_device *ndev; |
b150c386 PP |
295 | |
296 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); | |
297 | if (!entry) | |
298 | return NULL; | |
943bd984 PP |
299 | |
300 | ndev = rcu_dereference_protected(attr->ndev, 1); | |
301 | if (ndev) { | |
302 | entry->ndev_storage = kzalloc(sizeof(*entry->ndev_storage), | |
303 | GFP_KERNEL); | |
304 | if (!entry->ndev_storage) { | |
305 | kfree(entry); | |
306 | return NULL; | |
307 | } | |
308 | dev_hold(ndev); | |
309 | entry->ndev_storage->ndev = ndev; | |
310 | } | |
b150c386 PP |
311 | kref_init(&entry->kref); |
312 | memcpy(&entry->attr, attr, sizeof(*attr)); | |
b150c386 PP |
313 | INIT_WORK(&entry->del_work, free_gid_work); |
314 | entry->state = GID_TABLE_ENTRY_INVALID; | |
315 | return entry; | |
316 | } | |
317 | ||
318 | static void store_gid_entry(struct ib_gid_table *table, | |
319 | struct ib_gid_table_entry *entry) | |
320 | { | |
321 | entry->state = GID_TABLE_ENTRY_VALID; | |
322 | ||
43c7c851 JG |
323 | dev_dbg(&entry->attr.device->dev, "%s port=%d index=%d gid %pI6\n", |
324 | __func__, entry->attr.port_num, entry->attr.index, | |
325 | entry->attr.gid.raw); | |
b150c386 PP |
326 | |
327 | lockdep_assert_held(&table->lock); | |
328 | write_lock_irq(&table->rwlock); | |
329 | table->data_vec[entry->attr.index] = entry; | |
330 | write_unlock_irq(&table->rwlock); | |
331 | } | |
332 | ||
bf399c2c PP |
333 | static void get_gid_entry(struct ib_gid_table_entry *entry) |
334 | { | |
335 | kref_get(&entry->kref); | |
336 | } | |
337 | ||
b150c386 PP |
338 | static void put_gid_entry(struct ib_gid_table_entry *entry) |
339 | { | |
340 | kref_put(&entry->kref, schedule_free_gid); | |
341 | } | |
342 | ||
59d40813 PP |
343 | static void put_gid_entry_locked(struct ib_gid_table_entry *entry) |
344 | { | |
345 | kref_put(&entry->kref, free_gid_entry); | |
346 | } | |
347 | ||
b150c386 PP |
348 | static int add_roce_gid(struct ib_gid_table_entry *entry) |
349 | { | |
350 | const struct ib_gid_attr *attr = &entry->attr; | |
351 | int ret; | |
03db3a2d | 352 | |
598ff6ba | 353 | if (!attr->ndev) { |
43c7c851 JG |
354 | dev_err(&attr->device->dev, "%s NULL netdev port=%d index=%d\n", |
355 | __func__, attr->port_num, attr->index); | |
598ff6ba | 356 | return -EINVAL; |
03db3a2d | 357 | } |
598ff6ba | 358 | if (rdma_cap_roce_gid_table(attr->device, attr->port_num)) { |
3023a1e9 | 359 | ret = attr->device->ops.add_gid(attr, &entry->context); |
598ff6ba | 360 | if (ret) { |
43c7c851 JG |
361 | dev_err(&attr->device->dev, |
362 | "%s GID add failed port=%d index=%d\n", | |
363 | __func__, attr->port_num, attr->index); | |
b150c386 | 364 | return ret; |
598ff6ba | 365 | } |
8e787646 | 366 | } |
b150c386 | 367 | return 0; |
03db3a2d MB |
368 | } |
369 | ||
5c5702e2 PP |
370 | /** |
371 | * del_gid - Delete GID table entry | |
372 | * | |
373 | * @ib_dev: IB device whose GID entry to be deleted | |
374 | * @port: Port number of the IB device | |
375 | * @table: GID table of the IB device for a port | |
376 | * @ix: GID entry index to delete | |
377 | * | |
378 | */ | |
379 | static void del_gid(struct ib_device *ib_dev, u8 port, | |
380 | struct ib_gid_table *table, int ix) | |
381 | { | |
943bd984 | 382 | struct roce_gid_ndev_storage *ndev_storage; |
5c5702e2 PP |
383 | struct ib_gid_table_entry *entry; |
384 | ||
385 | lockdep_assert_held(&table->lock); | |
386 | ||
59bfc59a JG |
387 | dev_dbg(&ib_dev->dev, "%s port=%d index=%d gid %pI6\n", __func__, port, |
388 | ix, table->data_vec[ix]->attr.gid.raw); | |
5c5702e2 PP |
389 | |
390 | write_lock_irq(&table->rwlock); | |
391 | entry = table->data_vec[ix]; | |
392 | entry->state = GID_TABLE_ENTRY_PENDING_DEL; | |
393 | /* | |
394 | * For non RoCE protocol, GID entry slot is ready to use. | |
395 | */ | |
396 | if (!rdma_protocol_roce(ib_dev, port)) | |
397 | table->data_vec[ix] = NULL; | |
398 | write_unlock_irq(&table->rwlock); | |
399 | ||
943bd984 PP |
400 | ndev_storage = entry->ndev_storage; |
401 | if (ndev_storage) { | |
402 | entry->ndev_storage = NULL; | |
403 | rcu_assign_pointer(entry->attr.ndev, NULL); | |
404 | call_rcu(&ndev_storage->rcu_head, put_gid_ndev); | |
405 | } | |
406 | ||
be5914c1 PP |
407 | if (rdma_cap_roce_gid_table(ib_dev, port)) |
408 | ib_dev->ops.del_gid(&entry->attr, &entry->context); | |
409 | ||
5c5702e2 PP |
410 | put_gid_entry_locked(entry); |
411 | } | |
412 | ||
598ff6ba PP |
413 | /** |
414 | * add_modify_gid - Add or modify GID table entry | |
415 | * | |
416 | * @table: GID table in which GID to be added or modified | |
598ff6ba PP |
417 | * @attr: Attributes of the GID |
418 | * | |
419 | * Returns 0 on success or appropriate error code. It accepts zero | |
420 | * GID addition for non RoCE ports for HCA's who report them as valid | |
421 | * GID. However such zero GIDs are not added to the cache. | |
422 | */ | |
423 | static int add_modify_gid(struct ib_gid_table *table, | |
598ff6ba PP |
424 | const struct ib_gid_attr *attr) |
425 | { | |
b150c386 PP |
426 | struct ib_gid_table_entry *entry; |
427 | int ret = 0; | |
428 | ||
429 | /* | |
430 | * Invalidate any old entry in the table to make it safe to write to | |
431 | * this index. | |
432 | */ | |
433 | if (is_gid_entry_valid(table->data_vec[attr->index])) | |
5c5702e2 | 434 | del_gid(attr->device, attr->port_num, table, attr->index); |
b150c386 PP |
435 | |
436 | /* | |
437 | * Some HCA's report multiple GID entries with only one valid GID, and | |
438 | * leave other unused entries as the zero GID. Convert zero GIDs to | |
439 | * empty table entries instead of storing them. | |
440 | */ | |
441 | if (rdma_is_zero_gid(&attr->gid)) | |
442 | return 0; | |
443 | ||
444 | entry = alloc_gid_entry(attr); | |
445 | if (!entry) | |
446 | return -ENOMEM; | |
598ff6ba PP |
447 | |
448 | if (rdma_protocol_roce(attr->device, attr->port_num)) { | |
b150c386 | 449 | ret = add_roce_gid(entry); |
598ff6ba | 450 | if (ret) |
b150c386 | 451 | goto done; |
598ff6ba PP |
452 | } |
453 | ||
b150c386 | 454 | store_gid_entry(table, entry); |
598ff6ba | 455 | return 0; |
b150c386 PP |
456 | |
457 | done: | |
458 | put_gid_entry(entry); | |
459 | return ret; | |
03db3a2d MB |
460 | } |
461 | ||
598ff6ba | 462 | /* rwlock should be read locked, or lock should be held */ |
03db3a2d MB |
463 | static int find_gid(struct ib_gid_table *table, const union ib_gid *gid, |
464 | const struct ib_gid_attr *val, bool default_gid, | |
cee3c4d0 | 465 | unsigned long mask, int *pempty) |
03db3a2d | 466 | { |
cee3c4d0 MB |
467 | int i = 0; |
468 | int found = -1; | |
469 | int empty = pempty ? -1 : 0; | |
03db3a2d | 470 | |
cee3c4d0 | 471 | while (i < table->sz && (found < 0 || empty < 0)) { |
b150c386 PP |
472 | struct ib_gid_table_entry *data = table->data_vec[i]; |
473 | struct ib_gid_attr *attr; | |
cee3c4d0 | 474 | int curr_index = i; |
03db3a2d | 475 | |
cee3c4d0 | 476 | i++; |
03db3a2d | 477 | |
598ff6ba PP |
478 | /* find_gid() is used during GID addition where it is expected |
479 | * to return a free entry slot which is not duplicate. | |
480 | * Free entry slot is requested and returned if pempty is set, | |
481 | * so lookup free slot only if requested. | |
482 | */ | |
483 | if (pempty && empty < 0) { | |
b150c386 PP |
484 | if (is_gid_entry_free(data) && |
485 | default_gid == | |
486 | is_gid_index_default(table, curr_index)) { | |
a66ed149 PP |
487 | /* |
488 | * Found an invalid (free) entry; allocate it. | |
489 | * If default GID is requested, then our | |
490 | * found slot must be one of the DEFAULT | |
491 | * reserved slots or we fail. | |
492 | * This ensures that only DEFAULT reserved | |
493 | * slots are used for default property GIDs. | |
494 | */ | |
495 | empty = curr_index; | |
598ff6ba PP |
496 | } |
497 | } | |
498 | ||
499 | /* | |
500 | * Additionally find_gid() is used to find valid entry during | |
b150c386 PP |
501 | * lookup operation; so ignore the entries which are marked as |
502 | * pending for removal and the entries which are marked as | |
503 | * invalid. | |
598ff6ba | 504 | */ |
b150c386 | 505 | if (!is_gid_entry_valid(data)) |
cee3c4d0 MB |
506 | continue; |
507 | ||
cee3c4d0 | 508 | if (found >= 0) |
9c584f04 | 509 | continue; |
03db3a2d | 510 | |
b150c386 | 511 | attr = &data->attr; |
b39ffa1d MB |
512 | if (mask & GID_ATTR_FIND_MASK_GID_TYPE && |
513 | attr->gid_type != val->gid_type) | |
514 | continue; | |
515 | ||
03db3a2d | 516 | if (mask & GID_ATTR_FIND_MASK_GID && |
b150c386 | 517 | memcmp(gid, &data->attr.gid, sizeof(*gid))) |
9c584f04 | 518 | continue; |
03db3a2d MB |
519 | |
520 | if (mask & GID_ATTR_FIND_MASK_NETDEV && | |
521 | attr->ndev != val->ndev) | |
9c584f04 | 522 | continue; |
03db3a2d MB |
523 | |
524 | if (mask & GID_ATTR_FIND_MASK_DEFAULT && | |
1c36cf91 | 525 | is_gid_index_default(table, curr_index) != default_gid) |
9c584f04 | 526 | continue; |
03db3a2d | 527 | |
cee3c4d0 | 528 | found = curr_index; |
03db3a2d MB |
529 | } |
530 | ||
cee3c4d0 MB |
531 | if (pempty) |
532 | *pempty = empty; | |
533 | ||
534 | return found; | |
03db3a2d MB |
535 | } |
536 | ||
537 | static void make_default_gid(struct net_device *dev, union ib_gid *gid) | |
538 | { | |
539 | gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); | |
540 | addrconf_ifid_eui48(&gid->raw[8], dev); | |
541 | } | |
542 | ||
598ff6ba PP |
543 | static int __ib_cache_gid_add(struct ib_device *ib_dev, u8 port, |
544 | union ib_gid *gid, struct ib_gid_attr *attr, | |
545 | unsigned long mask, bool default_gid) | |
03db3a2d | 546 | { |
03db3a2d | 547 | struct ib_gid_table *table; |
1da177e4 | 548 | int ret = 0; |
cee3c4d0 | 549 | int empty; |
598ff6ba | 550 | int ix; |
1da177e4 | 551 | |
598ff6ba PP |
552 | /* Do not allow adding zero GID in support of |
553 | * IB spec version 1.3 section 4.1.1 point (6) and | |
554 | * section 12.7.10 and section 12.7.20 | |
555 | */ | |
25e62655 | 556 | if (rdma_is_zero_gid(gid)) |
1da177e4 LT |
557 | return -EINVAL; |
558 | ||
724631a9 | 559 | table = rdma_gid_table(ib_dev, port); |
598ff6ba PP |
560 | |
561 | mutex_lock(&table->lock); | |
562 | ||
563 | ix = find_gid(table, gid, attr, default_gid, mask, &empty); | |
564 | if (ix >= 0) | |
565 | goto out_unlock; | |
566 | ||
567 | if (empty < 0) { | |
568 | ret = -ENOSPC; | |
569 | goto out_unlock; | |
570 | } | |
571 | attr->device = ib_dev; | |
572 | attr->index = empty; | |
573 | attr->port_num = port; | |
b150c386 PP |
574 | attr->gid = *gid; |
575 | ret = add_modify_gid(table, attr); | |
598ff6ba PP |
576 | if (!ret) |
577 | dispatch_gid_change_event(ib_dev, port); | |
578 | ||
579 | out_unlock: | |
580 | mutex_unlock(&table->lock); | |
581 | if (ret) | |
582 | pr_warn("%s: unable to add gid %pI6 error=%d\n", | |
583 | __func__, gid->raw, ret); | |
584 | return ret; | |
585 | } | |
586 | ||
587 | int ib_cache_gid_add(struct ib_device *ib_dev, u8 port, | |
588 | union ib_gid *gid, struct ib_gid_attr *attr) | |
589 | { | |
823b23da PP |
590 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
591 | GID_ATTR_FIND_MASK_GID_TYPE | | |
592 | GID_ATTR_FIND_MASK_NETDEV; | |
c2261dd7 | 593 | |
823b23da | 594 | return __ib_cache_gid_add(ib_dev, port, gid, attr, mask, false); |
1da177e4 | 595 | } |
1da177e4 | 596 | |
22c01ee4 PP |
597 | static int |
598 | _ib_cache_gid_del(struct ib_device *ib_dev, u8 port, | |
599 | union ib_gid *gid, struct ib_gid_attr *attr, | |
dc5640f2 | 600 | unsigned long mask, bool default_gid) |
1da177e4 | 601 | { |
03db3a2d | 602 | struct ib_gid_table *table; |
598ff6ba | 603 | int ret = 0; |
03db3a2d MB |
604 | int ix; |
605 | ||
724631a9 | 606 | table = rdma_gid_table(ib_dev, port); |
03db3a2d MB |
607 | |
608 | mutex_lock(&table->lock); | |
609 | ||
dc5640f2 | 610 | ix = find_gid(table, gid, attr, default_gid, mask, NULL); |
598ff6ba PP |
611 | if (ix < 0) { |
612 | ret = -EINVAL; | |
03db3a2d | 613 | goto out_unlock; |
598ff6ba | 614 | } |
03db3a2d | 615 | |
598ff6ba PP |
616 | del_gid(ib_dev, port, table, ix); |
617 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
618 | |
619 | out_unlock: | |
620 | mutex_unlock(&table->lock); | |
598ff6ba PP |
621 | if (ret) |
622 | pr_debug("%s: can't delete gid %pI6 error=%d\n", | |
623 | __func__, gid->raw, ret); | |
624 | return ret; | |
03db3a2d MB |
625 | } |
626 | ||
22c01ee4 PP |
627 | int ib_cache_gid_del(struct ib_device *ib_dev, u8 port, |
628 | union ib_gid *gid, struct ib_gid_attr *attr) | |
629 | { | |
dc5640f2 PP |
630 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
631 | GID_ATTR_FIND_MASK_GID_TYPE | | |
632 | GID_ATTR_FIND_MASK_DEFAULT | | |
633 | GID_ATTR_FIND_MASK_NETDEV; | |
634 | ||
635 | return _ib_cache_gid_del(ib_dev, port, gid, attr, mask, false); | |
22c01ee4 PP |
636 | } |
637 | ||
03db3a2d MB |
638 | int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, |
639 | struct net_device *ndev) | |
640 | { | |
03db3a2d MB |
641 | struct ib_gid_table *table; |
642 | int ix; | |
9c584f04 | 643 | bool deleted = false; |
03db3a2d | 644 | |
724631a9 | 645 | table = rdma_gid_table(ib_dev, port); |
03db3a2d MB |
646 | |
647 | mutex_lock(&table->lock); | |
648 | ||
598ff6ba | 649 | for (ix = 0; ix < table->sz; ix++) { |
b150c386 PP |
650 | if (is_gid_entry_valid(table->data_vec[ix]) && |
651 | table->data_vec[ix]->attr.ndev == ndev) { | |
598ff6ba PP |
652 | del_gid(ib_dev, port, table, ix); |
653 | deleted = true; | |
654 | } | |
655 | } | |
03db3a2d MB |
656 | |
657 | mutex_unlock(&table->lock); | |
9c584f04 MB |
658 | |
659 | if (deleted) | |
660 | dispatch_gid_change_event(ib_dev, port); | |
661 | ||
03db3a2d MB |
662 | return 0; |
663 | } | |
664 | ||
6612b498 | 665 | /** |
c3d71b69 JG |
666 | * rdma_find_gid_by_port - Returns the GID entry attributes when it finds |
667 | * a valid GID entry for given search parameters. It searches for the specified | |
668 | * GID value in the local software cache. | |
6612b498 PP |
669 | * @device: The device to query. |
670 | * @gid: The GID value to search for. | |
671 | * @gid_type: The GID type to search for. | |
672 | * @port_num: The port number of the device where the GID value should be | |
673 | * searched. | |
c3d71b69 JG |
674 | * @ndev: In RoCE, the net device of the device. NULL means ignore. |
675 | * | |
676 | * Returns sgid attributes if the GID is found with valid reference or | |
677 | * returns ERR_PTR for the error. | |
678 | * The caller must invoke rdma_put_gid_attr() to release the reference. | |
6612b498 | 679 | */ |
c3d71b69 JG |
680 | const struct ib_gid_attr * |
681 | rdma_find_gid_by_port(struct ib_device *ib_dev, | |
682 | const union ib_gid *gid, | |
683 | enum ib_gid_type gid_type, | |
684 | u8 port, struct net_device *ndev) | |
03db3a2d MB |
685 | { |
686 | int local_index; | |
03db3a2d | 687 | struct ib_gid_table *table; |
b39ffa1d MB |
688 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
689 | GID_ATTR_FIND_MASK_GID_TYPE; | |
690 | struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type}; | |
c3d71b69 | 691 | const struct ib_gid_attr *attr; |
9c584f04 | 692 | unsigned long flags; |
03db3a2d | 693 | |
24dc831b | 694 | if (!rdma_is_port_valid(ib_dev, port)) |
c3d71b69 | 695 | return ERR_PTR(-ENOENT); |
03db3a2d | 696 | |
724631a9 | 697 | table = rdma_gid_table(ib_dev, port); |
03db3a2d MB |
698 | |
699 | if (ndev) | |
700 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
701 | ||
9c584f04 | 702 | read_lock_irqsave(&table->rwlock, flags); |
cee3c4d0 | 703 | local_index = find_gid(table, gid, &val, false, mask, NULL); |
03db3a2d | 704 | if (local_index >= 0) { |
c3d71b69 JG |
705 | get_gid_entry(table->data_vec[local_index]); |
706 | attr = &table->data_vec[local_index]->attr; | |
9c584f04 | 707 | read_unlock_irqrestore(&table->rwlock, flags); |
c3d71b69 | 708 | return attr; |
03db3a2d MB |
709 | } |
710 | ||
9c584f04 | 711 | read_unlock_irqrestore(&table->rwlock, flags); |
c3d71b69 | 712 | return ERR_PTR(-ENOENT); |
03db3a2d | 713 | } |
c3d71b69 | 714 | EXPORT_SYMBOL(rdma_find_gid_by_port); |
03db3a2d | 715 | |
99b27e3b | 716 | /** |
c3d71b69 JG |
717 | * rdma_find_gid_by_filter - Returns the GID table attribute where a |
718 | * specified GID value occurs | |
99b27e3b MB |
719 | * @device: The device to query. |
720 | * @gid: The GID value to search for. | |
c3d71b69 | 721 | * @port: The port number of the device where the GID value could be |
99b27e3b MB |
722 | * searched. |
723 | * @filter: The filter function is executed on any matching GID in the table. | |
724 | * If the filter function returns true, the corresponding index is returned, | |
725 | * otherwise, we continue searching the GID table. It's guaranteed that | |
726 | * while filter is executed, ndev field is valid and the structure won't | |
727 | * change. filter is executed in an atomic context. filter must not be NULL. | |
99b27e3b | 728 | * |
c3d71b69 | 729 | * rdma_find_gid_by_filter() searches for the specified GID value |
99b27e3b | 730 | * of which the filter function returns true in the port's GID table. |
99b27e3b MB |
731 | * |
732 | */ | |
c3d71b69 JG |
733 | const struct ib_gid_attr *rdma_find_gid_by_filter( |
734 | struct ib_device *ib_dev, const union ib_gid *gid, u8 port, | |
735 | bool (*filter)(const union ib_gid *gid, const struct ib_gid_attr *, | |
736 | void *), | |
737 | void *context) | |
99b27e3b | 738 | { |
c3d71b69 | 739 | const struct ib_gid_attr *res = ERR_PTR(-ENOENT); |
99b27e3b | 740 | struct ib_gid_table *table; |
9c584f04 | 741 | unsigned long flags; |
c3d71b69 | 742 | unsigned int i; |
99b27e3b | 743 | |
83f6f8d2 JG |
744 | if (!rdma_is_port_valid(ib_dev, port)) |
745 | return ERR_PTR(-EINVAL); | |
99b27e3b | 746 | |
724631a9 | 747 | table = rdma_gid_table(ib_dev, port); |
99b27e3b | 748 | |
9c584f04 | 749 | read_lock_irqsave(&table->rwlock, flags); |
99b27e3b | 750 | for (i = 0; i < table->sz; i++) { |
83f6f8d2 | 751 | struct ib_gid_table_entry *entry = table->data_vec[i]; |
99b27e3b | 752 | |
83f6f8d2 | 753 | if (!is_gid_entry_valid(entry)) |
151ed9d7 | 754 | continue; |
99b27e3b | 755 | |
83f6f8d2 | 756 | if (memcmp(gid, &entry->attr.gid, sizeof(*gid))) |
151ed9d7 | 757 | continue; |
99b27e3b | 758 | |
83f6f8d2 JG |
759 | if (filter(gid, &entry->attr, context)) { |
760 | get_gid_entry(entry); | |
761 | res = &entry->attr; | |
99b27e3b | 762 | break; |
151ed9d7 | 763 | } |
99b27e3b | 764 | } |
9c584f04 | 765 | read_unlock_irqrestore(&table->rwlock, flags); |
c3d71b69 JG |
766 | return res; |
767 | } | |
768 | ||
03db3a2d MB |
769 | static struct ib_gid_table *alloc_gid_table(int sz) |
770 | { | |
b150c386 | 771 | struct ib_gid_table *table = kzalloc(sizeof(*table), GFP_KERNEL); |
9c584f04 | 772 | |
03db3a2d MB |
773 | if (!table) |
774 | return NULL; | |
775 | ||
776 | table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL); | |
777 | if (!table->data_vec) | |
778 | goto err_free_table; | |
779 | ||
780 | mutex_init(&table->lock); | |
781 | ||
782 | table->sz = sz; | |
9c584f04 | 783 | rwlock_init(&table->rwlock); |
03db3a2d MB |
784 | return table; |
785 | ||
786 | err_free_table: | |
787 | kfree(table); | |
788 | return NULL; | |
789 | } | |
790 | ||
8faea9fd | 791 | static void release_gid_table(struct ib_device *device, |
b150c386 | 792 | struct ib_gid_table *table) |
03db3a2d | 793 | { |
b150c386 PP |
794 | bool leak = false; |
795 | int i; | |
796 | ||
797 | if (!table) | |
798 | return; | |
799 | ||
800 | for (i = 0; i < table->sz; i++) { | |
801 | if (is_gid_entry_free(table->data_vec[i])) | |
802 | continue; | |
803 | if (kref_read(&table->data_vec[i]->kref) > 1) { | |
43c7c851 JG |
804 | dev_err(&device->dev, |
805 | "GID entry ref leak for index %d ref=%d\n", i, | |
806 | kref_read(&table->data_vec[i]->kref)); | |
b150c386 PP |
807 | leak = true; |
808 | } | |
03db3a2d | 809 | } |
b150c386 PP |
810 | if (leak) |
811 | return; | |
812 | ||
813 | kfree(table->data_vec); | |
814 | kfree(table); | |
03db3a2d MB |
815 | } |
816 | ||
817 | static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port, | |
818 | struct ib_gid_table *table) | |
819 | { | |
820 | int i; | |
9c584f04 | 821 | bool deleted = false; |
03db3a2d MB |
822 | |
823 | if (!table) | |
824 | return; | |
825 | ||
598ff6ba | 826 | mutex_lock(&table->lock); |
03db3a2d | 827 | for (i = 0; i < table->sz; ++i) { |
b150c386 | 828 | if (is_gid_entry_valid(table->data_vec[i])) { |
598ff6ba PP |
829 | del_gid(ib_dev, port, table, i); |
830 | deleted = true; | |
831 | } | |
03db3a2d | 832 | } |
598ff6ba | 833 | mutex_unlock(&table->lock); |
9c584f04 MB |
834 | |
835 | if (deleted) | |
836 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
837 | } |
838 | ||
839 | void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port, | |
840 | struct net_device *ndev, | |
b39ffa1d | 841 | unsigned long gid_type_mask, |
03db3a2d MB |
842 | enum ib_cache_gid_default_mode mode) |
843 | { | |
dc5640f2 | 844 | union ib_gid gid = { }; |
03db3a2d | 845 | struct ib_gid_attr gid_attr; |
b39ffa1d | 846 | unsigned int gid_type; |
598ff6ba | 847 | unsigned long mask; |
03db3a2d | 848 | |
dc5640f2 PP |
849 | mask = GID_ATTR_FIND_MASK_GID_TYPE | |
850 | GID_ATTR_FIND_MASK_DEFAULT | | |
851 | GID_ATTR_FIND_MASK_NETDEV; | |
03db3a2d MB |
852 | memset(&gid_attr, 0, sizeof(gid_attr)); |
853 | gid_attr.ndev = ndev; | |
854 | ||
b39ffa1d | 855 | for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) { |
b39ffa1d MB |
856 | if (1UL << gid_type & ~gid_type_mask) |
857 | continue; | |
858 | ||
859 | gid_attr.gid_type = gid_type; | |
860 | ||
b39ffa1d | 861 | if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) { |
dc5640f2 | 862 | make_default_gid(ndev, &gid); |
598ff6ba PP |
863 | __ib_cache_gid_add(ib_dev, port, &gid, |
864 | &gid_attr, mask, true); | |
865 | } else if (mode == IB_CACHE_GID_DEFAULT_MODE_DELETE) { | |
dc5640f2 PP |
866 | _ib_cache_gid_del(ib_dev, port, &gid, |
867 | &gid_attr, mask, true); | |
9c584f04 | 868 | } |
b39ffa1d | 869 | } |
03db3a2d MB |
870 | } |
871 | ||
25a1cd3f PP |
872 | static void gid_table_reserve_default(struct ib_device *ib_dev, u8 port, |
873 | struct ib_gid_table *table) | |
03db3a2d | 874 | { |
b39ffa1d MB |
875 | unsigned int i; |
876 | unsigned long roce_gid_type_mask; | |
877 | unsigned int num_default_gids; | |
b39ffa1d MB |
878 | |
879 | roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port); | |
880 | num_default_gids = hweight_long(roce_gid_type_mask); | |
1c36cf91 PP |
881 | /* Reserve starting indices for default GIDs */ |
882 | for (i = 0; i < num_default_gids && i < table->sz; i++) | |
883 | table->default_gid_indices |= BIT(i); | |
03db3a2d | 884 | } |
03db3a2d | 885 | |
be0e8f34 PP |
886 | |
887 | static void gid_table_release_one(struct ib_device *ib_dev) | |
888 | { | |
8faea9fd | 889 | unsigned int p; |
be0e8f34 | 890 | |
8faea9fd JG |
891 | rdma_for_each_port (ib_dev, p) { |
892 | release_gid_table(ib_dev, ib_dev->port_data[p].cache.gid); | |
893 | ib_dev->port_data[p].cache.gid = NULL; | |
be0e8f34 | 894 | } |
03db3a2d MB |
895 | } |
896 | ||
897 | static int _gid_table_setup_one(struct ib_device *ib_dev) | |
898 | { | |
21d6454a | 899 | struct ib_gid_table *table; |
8faea9fd | 900 | unsigned int rdma_port; |
03db3a2d | 901 | |
8faea9fd | 902 | rdma_for_each_port (ib_dev, rdma_port) { |
8ceb1357 JG |
903 | table = alloc_gid_table( |
904 | ib_dev->port_data[rdma_port].immutable.gid_tbl_len); | |
be0e8f34 | 905 | if (!table) |
03db3a2d | 906 | goto rollback_table_setup; |
03db3a2d | 907 | |
25a1cd3f | 908 | gid_table_reserve_default(ib_dev, rdma_port, table); |
8faea9fd | 909 | ib_dev->port_data[rdma_port].cache.gid = table; |
03db3a2d | 910 | } |
03db3a2d MB |
911 | return 0; |
912 | ||
913 | rollback_table_setup: | |
be0e8f34 PP |
914 | gid_table_release_one(ib_dev); |
915 | return -ENOMEM; | |
03db3a2d MB |
916 | } |
917 | ||
918 | static void gid_table_cleanup_one(struct ib_device *ib_dev) | |
919 | { | |
8faea9fd | 920 | unsigned int p; |
03db3a2d | 921 | |
8faea9fd JG |
922 | rdma_for_each_port (ib_dev, p) |
923 | cleanup_gid_table_port(ib_dev, p, | |
924 | ib_dev->port_data[p].cache.gid); | |
03db3a2d MB |
925 | } |
926 | ||
927 | static int gid_table_setup_one(struct ib_device *ib_dev) | |
928 | { | |
929 | int err; | |
930 | ||
931 | err = _gid_table_setup_one(ib_dev); | |
932 | ||
933 | if (err) | |
934 | return err; | |
935 | ||
32f69e4b | 936 | rdma_roce_rescan_device(ib_dev); |
03db3a2d MB |
937 | |
938 | return err; | |
939 | } | |
940 | ||
6612b498 | 941 | /** |
c3d71b69 JG |
942 | * rdma_query_gid - Read the GID content from the GID software cache |
943 | * @device: Device to query the GID | |
944 | * @port_num: Port number of the device | |
945 | * @index: Index of the GID table entry to read | |
946 | * @gid: Pointer to GID where to store the entry's GID | |
947 | * | |
948 | * rdma_query_gid() only reads the GID entry content for requested device, | |
949 | * port and index. It reads for IB, RoCE and iWarp link layers. It doesn't | |
950 | * hold any reference to the GID table entry in the HCA or software cache. | |
951 | * | |
952 | * Returns 0 on success or appropriate error code. | |
953 | * | |
954 | */ | |
955 | int rdma_query_gid(struct ib_device *device, u8 port_num, | |
956 | int index, union ib_gid *gid) | |
957 | { | |
958 | struct ib_gid_table *table; | |
959 | unsigned long flags; | |
960 | int res = -EINVAL; | |
961 | ||
962 | if (!rdma_is_port_valid(device, port_num)) | |
963 | return -EINVAL; | |
964 | ||
965 | table = rdma_gid_table(device, port_num); | |
966 | read_lock_irqsave(&table->rwlock, flags); | |
967 | ||
968 | if (index < 0 || index >= table->sz || | |
969 | !is_gid_entry_valid(table->data_vec[index])) | |
970 | goto done; | |
971 | ||
972 | memcpy(gid, &table->data_vec[index]->attr.gid, sizeof(*gid)); | |
973 | res = 0; | |
974 | ||
975 | done: | |
976 | read_unlock_irqrestore(&table->rwlock, flags); | |
977 | return res; | |
978 | } | |
979 | EXPORT_SYMBOL(rdma_query_gid); | |
980 | ||
981 | /** | |
982 | * rdma_find_gid - Returns SGID attributes if the matching GID is found. | |
6612b498 PP |
983 | * @device: The device to query. |
984 | * @gid: The GID value to search for. | |
985 | * @gid_type: The GID type to search for. | |
986 | * @ndev: In RoCE, the net device of the device. NULL means ignore. | |
6612b498 | 987 | * |
c3d71b69 JG |
988 | * rdma_find_gid() searches for the specified GID value in the software cache. |
989 | * | |
990 | * Returns GID attributes if a valid GID is found or returns ERR_PTR for the | |
991 | * error. The caller must invoke rdma_put_gid_attr() to release the reference. | |
992 | * | |
6612b498 | 993 | */ |
c3d71b69 JG |
994 | const struct ib_gid_attr *rdma_find_gid(struct ib_device *device, |
995 | const union ib_gid *gid, | |
996 | enum ib_gid_type gid_type, | |
997 | struct net_device *ndev) | |
03db3a2d | 998 | { |
c3d71b69 JG |
999 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
1000 | GID_ATTR_FIND_MASK_GID_TYPE; | |
1001 | struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type}; | |
8faea9fd | 1002 | unsigned int p; |
c3d71b69 JG |
1003 | |
1004 | if (ndev) | |
1005 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
1006 | ||
8faea9fd | 1007 | rdma_for_each_port(device, p) { |
c3d71b69 JG |
1008 | struct ib_gid_table *table; |
1009 | unsigned long flags; | |
1010 | int index; | |
1011 | ||
8faea9fd | 1012 | table = device->port_data[p].cache.gid; |
c3d71b69 JG |
1013 | read_lock_irqsave(&table->rwlock, flags); |
1014 | index = find_gid(table, gid, &gid_attr_val, false, mask, NULL); | |
1015 | if (index >= 0) { | |
1016 | const struct ib_gid_attr *attr; | |
1017 | ||
1018 | get_gid_entry(table->data_vec[index]); | |
1019 | attr = &table->data_vec[index]->attr; | |
1020 | read_unlock_irqrestore(&table->rwlock, flags); | |
1021 | return attr; | |
1022 | } | |
1023 | read_unlock_irqrestore(&table->rwlock, flags); | |
1024 | } | |
1025 | ||
1026 | return ERR_PTR(-ENOENT); | |
1027 | } | |
1028 | EXPORT_SYMBOL(rdma_find_gid); | |
1029 | ||
1da177e4 LT |
1030 | int ib_get_cached_pkey(struct ib_device *device, |
1031 | u8 port_num, | |
1032 | int index, | |
1033 | u16 *pkey) | |
1034 | { | |
1035 | struct ib_pkey_cache *cache; | |
1036 | unsigned long flags; | |
1037 | int ret = 0; | |
1038 | ||
24dc831b | 1039 | if (!rdma_is_port_valid(device, port_num)) |
1da177e4 LT |
1040 | return -EINVAL; |
1041 | ||
1042 | read_lock_irqsave(&device->cache.lock, flags); | |
1043 | ||
8faea9fd | 1044 | cache = device->port_data[port_num].cache.pkey; |
1da177e4 LT |
1045 | |
1046 | if (index < 0 || index >= cache->table_len) | |
1047 | ret = -EINVAL; | |
1048 | else | |
1049 | *pkey = cache->table[index]; | |
1050 | ||
1051 | read_unlock_irqrestore(&device->cache.lock, flags); | |
1052 | ||
1053 | return ret; | |
1054 | } | |
1055 | EXPORT_SYMBOL(ib_get_cached_pkey); | |
1056 | ||
883c71fe DJ |
1057 | int ib_get_cached_subnet_prefix(struct ib_device *device, |
1058 | u8 port_num, | |
1059 | u64 *sn_pfx) | |
1060 | { | |
1061 | unsigned long flags; | |
883c71fe | 1062 | |
6d5b2047 | 1063 | if (!rdma_is_port_valid(device, port_num)) |
883c71fe DJ |
1064 | return -EINVAL; |
1065 | ||
883c71fe | 1066 | read_lock_irqsave(&device->cache.lock, flags); |
8faea9fd | 1067 | *sn_pfx = device->port_data[port_num].cache.subnet_prefix; |
883c71fe DJ |
1068 | read_unlock_irqrestore(&device->cache.lock, flags); |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | EXPORT_SYMBOL(ib_get_cached_subnet_prefix); | |
1073 | ||
1da177e4 LT |
1074 | int ib_find_cached_pkey(struct ib_device *device, |
1075 | u8 port_num, | |
1076 | u16 pkey, | |
1077 | u16 *index) | |
1078 | { | |
1079 | struct ib_pkey_cache *cache; | |
1080 | unsigned long flags; | |
1081 | int i; | |
1082 | int ret = -ENOENT; | |
ff7166c4 | 1083 | int partial_ix = -1; |
1da177e4 | 1084 | |
24dc831b | 1085 | if (!rdma_is_port_valid(device, port_num)) |
1da177e4 LT |
1086 | return -EINVAL; |
1087 | ||
1088 | read_lock_irqsave(&device->cache.lock, flags); | |
1089 | ||
8faea9fd | 1090 | cache = device->port_data[port_num].cache.pkey; |
1da177e4 LT |
1091 | |
1092 | *index = -1; | |
1093 | ||
1094 | for (i = 0; i < cache->table_len; ++i) | |
1095 | if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) { | |
ff7166c4 JM |
1096 | if (cache->table[i] & 0x8000) { |
1097 | *index = i; | |
1098 | ret = 0; | |
1099 | break; | |
1100 | } else | |
1101 | partial_ix = i; | |
1da177e4 LT |
1102 | } |
1103 | ||
ff7166c4 JM |
1104 | if (ret && partial_ix >= 0) { |
1105 | *index = partial_ix; | |
1106 | ret = 0; | |
1107 | } | |
1108 | ||
1da177e4 LT |
1109 | read_unlock_irqrestore(&device->cache.lock, flags); |
1110 | ||
1111 | return ret; | |
1112 | } | |
1113 | EXPORT_SYMBOL(ib_find_cached_pkey); | |
1114 | ||
73aaa741 JM |
1115 | int ib_find_exact_cached_pkey(struct ib_device *device, |
1116 | u8 port_num, | |
1117 | u16 pkey, | |
1118 | u16 *index) | |
1119 | { | |
1120 | struct ib_pkey_cache *cache; | |
1121 | unsigned long flags; | |
1122 | int i; | |
1123 | int ret = -ENOENT; | |
1124 | ||
24dc831b | 1125 | if (!rdma_is_port_valid(device, port_num)) |
73aaa741 JM |
1126 | return -EINVAL; |
1127 | ||
1128 | read_lock_irqsave(&device->cache.lock, flags); | |
1129 | ||
8faea9fd | 1130 | cache = device->port_data[port_num].cache.pkey; |
73aaa741 JM |
1131 | |
1132 | *index = -1; | |
1133 | ||
1134 | for (i = 0; i < cache->table_len; ++i) | |
1135 | if (cache->table[i] == pkey) { | |
1136 | *index = i; | |
1137 | ret = 0; | |
1138 | break; | |
1139 | } | |
1140 | ||
1141 | read_unlock_irqrestore(&device->cache.lock, flags); | |
1142 | ||
1143 | return ret; | |
1144 | } | |
1145 | EXPORT_SYMBOL(ib_find_exact_cached_pkey); | |
1146 | ||
6fb9cdbf JM |
1147 | int ib_get_cached_lmc(struct ib_device *device, |
1148 | u8 port_num, | |
1149 | u8 *lmc) | |
1150 | { | |
1151 | unsigned long flags; | |
1152 | int ret = 0; | |
1153 | ||
24dc831b | 1154 | if (!rdma_is_port_valid(device, port_num)) |
6fb9cdbf JM |
1155 | return -EINVAL; |
1156 | ||
1157 | read_lock_irqsave(&device->cache.lock, flags); | |
8faea9fd | 1158 | *lmc = device->port_data[port_num].cache.lmc; |
6fb9cdbf JM |
1159 | read_unlock_irqrestore(&device->cache.lock, flags); |
1160 | ||
1161 | return ret; | |
1162 | } | |
1163 | EXPORT_SYMBOL(ib_get_cached_lmc); | |
1164 | ||
9e2c3f1c JW |
1165 | int ib_get_cached_port_state(struct ib_device *device, |
1166 | u8 port_num, | |
1167 | enum ib_port_state *port_state) | |
1168 | { | |
1169 | unsigned long flags; | |
1170 | int ret = 0; | |
1171 | ||
6d5b2047 | 1172 | if (!rdma_is_port_valid(device, port_num)) |
9e2c3f1c JW |
1173 | return -EINVAL; |
1174 | ||
1175 | read_lock_irqsave(&device->cache.lock, flags); | |
8faea9fd | 1176 | *port_state = device->port_data[port_num].cache.port_state; |
9e2c3f1c JW |
1177 | read_unlock_irqrestore(&device->cache.lock, flags); |
1178 | ||
1179 | return ret; | |
1180 | } | |
1181 | EXPORT_SYMBOL(ib_get_cached_port_state); | |
1182 | ||
bf399c2c PP |
1183 | /** |
1184 | * rdma_get_gid_attr - Returns GID attributes for a port of a device | |
1185 | * at a requested gid_index, if a valid GID entry exists. | |
1186 | * @device: The device to query. | |
1187 | * @port_num: The port number on the device where the GID value | |
1188 | * is to be queried. | |
1189 | * @index: Index of the GID table entry whose attributes are to | |
1190 | * be queried. | |
1191 | * | |
1192 | * rdma_get_gid_attr() acquires reference count of gid attributes from the | |
1193 | * cached GID table. Caller must invoke rdma_put_gid_attr() to release | |
1194 | * reference to gid attribute regardless of link layer. | |
1195 | * | |
1196 | * Returns pointer to valid gid attribute or ERR_PTR for the appropriate error | |
1197 | * code. | |
1198 | */ | |
1199 | const struct ib_gid_attr * | |
1200 | rdma_get_gid_attr(struct ib_device *device, u8 port_num, int index) | |
1201 | { | |
1202 | const struct ib_gid_attr *attr = ERR_PTR(-EINVAL); | |
1203 | struct ib_gid_table *table; | |
1204 | unsigned long flags; | |
1205 | ||
1206 | if (!rdma_is_port_valid(device, port_num)) | |
1207 | return ERR_PTR(-EINVAL); | |
1208 | ||
1209 | table = rdma_gid_table(device, port_num); | |
1210 | if (index < 0 || index >= table->sz) | |
1211 | return ERR_PTR(-EINVAL); | |
1212 | ||
1213 | read_lock_irqsave(&table->rwlock, flags); | |
1214 | if (!is_gid_entry_valid(table->data_vec[index])) | |
1215 | goto done; | |
1216 | ||
1217 | get_gid_entry(table->data_vec[index]); | |
1218 | attr = &table->data_vec[index]->attr; | |
1219 | done: | |
1220 | read_unlock_irqrestore(&table->rwlock, flags); | |
1221 | return attr; | |
1222 | } | |
1223 | EXPORT_SYMBOL(rdma_get_gid_attr); | |
1224 | ||
1225 | /** | |
1226 | * rdma_put_gid_attr - Release reference to the GID attribute | |
1227 | * @attr: Pointer to the GID attribute whose reference | |
1228 | * needs to be released. | |
1229 | * | |
1230 | * rdma_put_gid_attr() must be used to release reference whose | |
1231 | * reference is acquired using rdma_get_gid_attr() or any APIs | |
1232 | * which returns a pointer to the ib_gid_attr regardless of link layer | |
1233 | * of IB or RoCE. | |
1234 | * | |
1235 | */ | |
1236 | void rdma_put_gid_attr(const struct ib_gid_attr *attr) | |
1237 | { | |
1238 | struct ib_gid_table_entry *entry = | |
1239 | container_of(attr, struct ib_gid_table_entry, attr); | |
1240 | ||
1241 | put_gid_entry(entry); | |
1242 | } | |
1243 | EXPORT_SYMBOL(rdma_put_gid_attr); | |
1244 | ||
1245 | /** | |
1246 | * rdma_hold_gid_attr - Get reference to existing GID attribute | |
1247 | * | |
1248 | * @attr: Pointer to the GID attribute whose reference | |
1249 | * needs to be taken. | |
1250 | * | |
1251 | * Increase the reference count to a GID attribute to keep it from being | |
1252 | * freed. Callers are required to already be holding a reference to attribute. | |
1253 | * | |
1254 | */ | |
1255 | void rdma_hold_gid_attr(const struct ib_gid_attr *attr) | |
1256 | { | |
1257 | struct ib_gid_table_entry *entry = | |
1258 | container_of(attr, struct ib_gid_table_entry, attr); | |
1259 | ||
1260 | get_gid_entry(entry); | |
1261 | } | |
1262 | EXPORT_SYMBOL(rdma_hold_gid_attr); | |
1263 | ||
d6b1764a PP |
1264 | /** |
1265 | * rdma_read_gid_attr_ndev_rcu - Read GID attribute netdevice | |
1266 | * which must be in UP state. | |
1267 | * | |
1268 | * @attr:Pointer to the GID attribute | |
1269 | * | |
1270 | * Returns pointer to netdevice if the netdevice was attached to GID and | |
1271 | * netdevice is in UP state. Caller must hold RCU lock as this API | |
1272 | * reads the netdev flags which can change while netdevice migrates to | |
1273 | * different net namespace. Returns ERR_PTR with error code otherwise. | |
1274 | * | |
1275 | */ | |
1276 | struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr) | |
1277 | { | |
1278 | struct ib_gid_table_entry *entry = | |
1279 | container_of(attr, struct ib_gid_table_entry, attr); | |
1280 | struct ib_device *device = entry->attr.device; | |
1281 | struct net_device *ndev = ERR_PTR(-ENODEV); | |
1282 | u8 port_num = entry->attr.port_num; | |
1283 | struct ib_gid_table *table; | |
1284 | unsigned long flags; | |
1285 | bool valid; | |
1286 | ||
1287 | table = rdma_gid_table(device, port_num); | |
1288 | ||
1289 | read_lock_irqsave(&table->rwlock, flags); | |
1290 | valid = is_gid_entry_valid(table->data_vec[attr->index]); | |
943bd984 PP |
1291 | if (valid) { |
1292 | ndev = rcu_dereference(attr->ndev); | |
1293 | if (!ndev || | |
1294 | (ndev && ((READ_ONCE(ndev->flags) & IFF_UP) == 0))) | |
1295 | ndev = ERR_PTR(-ENODEV); | |
1296 | } | |
d6b1764a PP |
1297 | read_unlock_irqrestore(&table->rwlock, flags); |
1298 | return ndev; | |
1299 | } | |
adb4a57a | 1300 | EXPORT_SYMBOL(rdma_read_gid_attr_ndev_rcu); |
d6b1764a | 1301 | |
a70c0739 PP |
1302 | static int get_lower_dev_vlan(struct net_device *lower_dev, void *data) |
1303 | { | |
1304 | u16 *vlan_id = data; | |
1305 | ||
1306 | if (is_vlan_dev(lower_dev)) | |
1307 | *vlan_id = vlan_dev_vlan_id(lower_dev); | |
1308 | ||
1309 | /* We are interested only in first level vlan device, so | |
1310 | * always return 1 to stop iterating over next level devices. | |
1311 | */ | |
1312 | return 1; | |
1313 | } | |
1314 | ||
1315 | /** | |
1316 | * rdma_read_gid_l2_fields - Read the vlan ID and source MAC address | |
1317 | * of a GID entry. | |
1318 | * | |
1319 | * @attr: GID attribute pointer whose L2 fields to be read | |
1320 | * @vlan_id: Pointer to vlan id to fill up if the GID entry has | |
1321 | * vlan id. It is optional. | |
1322 | * @smac: Pointer to smac to fill up for a GID entry. It is optional. | |
1323 | * | |
1324 | * rdma_read_gid_l2_fields() returns 0 on success and returns vlan id | |
1325 | * (if gid entry has vlan) and source MAC, or returns error. | |
1326 | */ | |
1327 | int rdma_read_gid_l2_fields(const struct ib_gid_attr *attr, | |
1328 | u16 *vlan_id, u8 *smac) | |
1329 | { | |
1330 | struct net_device *ndev; | |
1331 | ||
943bd984 PP |
1332 | rcu_read_lock(); |
1333 | ndev = rcu_dereference(attr->ndev); | |
1334 | if (!ndev) { | |
1335 | rcu_read_unlock(); | |
1336 | return -ENODEV; | |
1337 | } | |
a70c0739 PP |
1338 | if (smac) |
1339 | ether_addr_copy(smac, ndev->dev_addr); | |
1340 | if (vlan_id) { | |
1341 | *vlan_id = 0xffff; | |
1342 | if (is_vlan_dev(ndev)) { | |
1343 | *vlan_id = vlan_dev_vlan_id(ndev); | |
1344 | } else { | |
1345 | /* If the netdev is upper device and if it's lower | |
1346 | * device is vlan device, consider vlan id of the | |
1347 | * the lower vlan device for this gid entry. | |
1348 | */ | |
a70c0739 PP |
1349 | netdev_walk_all_lower_dev_rcu(attr->ndev, |
1350 | get_lower_dev_vlan, vlan_id); | |
a70c0739 PP |
1351 | } |
1352 | } | |
943bd984 | 1353 | rcu_read_unlock(); |
a70c0739 PP |
1354 | return 0; |
1355 | } | |
1356 | EXPORT_SYMBOL(rdma_read_gid_l2_fields); | |
1357 | ||
598ff6ba PP |
1358 | static int config_non_roce_gid_cache(struct ib_device *device, |
1359 | u8 port, int gid_tbl_len) | |
1360 | { | |
1361 | struct ib_gid_attr gid_attr = {}; | |
1362 | struct ib_gid_table *table; | |
598ff6ba PP |
1363 | int ret = 0; |
1364 | int i; | |
1365 | ||
1366 | gid_attr.device = device; | |
1367 | gid_attr.port_num = port; | |
724631a9 | 1368 | table = rdma_gid_table(device, port); |
598ff6ba PP |
1369 | |
1370 | mutex_lock(&table->lock); | |
1371 | for (i = 0; i < gid_tbl_len; ++i) { | |
3023a1e9 | 1372 | if (!device->ops.query_gid) |
598ff6ba | 1373 | continue; |
3023a1e9 | 1374 | ret = device->ops.query_gid(device, port, i, &gid_attr.gid); |
598ff6ba | 1375 | if (ret) { |
43c7c851 JG |
1376 | dev_warn(&device->dev, |
1377 | "query_gid failed (%d) for index %d\n", ret, | |
1378 | i); | |
598ff6ba PP |
1379 | goto err; |
1380 | } | |
1381 | gid_attr.index = i; | |
b150c386 | 1382 | add_modify_gid(table, &gid_attr); |
598ff6ba PP |
1383 | } |
1384 | err: | |
1385 | mutex_unlock(&table->lock); | |
1386 | return ret; | |
1387 | } | |
1388 | ||
1da177e4 | 1389 | static void ib_cache_update(struct ib_device *device, |
d291f1a6 DJ |
1390 | u8 port, |
1391 | bool enforce_security) | |
1da177e4 LT |
1392 | { |
1393 | struct ib_port_attr *tprops = NULL; | |
1394 | struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache; | |
1da177e4 LT |
1395 | int i; |
1396 | int ret; | |
03db3a2d | 1397 | |
24dc831b | 1398 | if (!rdma_is_port_valid(device, port)) |
03db3a2d MB |
1399 | return; |
1400 | ||
1da177e4 LT |
1401 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); |
1402 | if (!tprops) | |
1403 | return; | |
1404 | ||
1405 | ret = ib_query_port(device, port, tprops); | |
1406 | if (ret) { | |
43c7c851 | 1407 | dev_warn(&device->dev, "ib_query_port failed (%d)\n", ret); |
1da177e4 LT |
1408 | goto err; |
1409 | } | |
1410 | ||
598ff6ba PP |
1411 | if (!rdma_protocol_roce(device, port)) { |
1412 | ret = config_non_roce_gid_cache(device, port, | |
1413 | tprops->gid_tbl_len); | |
1414 | if (ret) | |
1415 | goto err; | |
1416 | } | |
1417 | ||
acafe7e3 KC |
1418 | pkey_cache = kmalloc(struct_size(pkey_cache, table, |
1419 | tprops->pkey_tbl_len), | |
1420 | GFP_KERNEL); | |
1da177e4 LT |
1421 | if (!pkey_cache) |
1422 | goto err; | |
1423 | ||
1424 | pkey_cache->table_len = tprops->pkey_tbl_len; | |
1425 | ||
1da177e4 LT |
1426 | for (i = 0; i < pkey_cache->table_len; ++i) { |
1427 | ret = ib_query_pkey(device, port, i, pkey_cache->table + i); | |
1428 | if (ret) { | |
43c7c851 JG |
1429 | dev_warn(&device->dev, |
1430 | "ib_query_pkey failed (%d) for index %d\n", | |
1431 | ret, i); | |
1da177e4 LT |
1432 | goto err; |
1433 | } | |
1434 | } | |
1435 | ||
1da177e4 LT |
1436 | write_lock_irq(&device->cache.lock); |
1437 | ||
8faea9fd | 1438 | old_pkey_cache = device->port_data[port].cache.pkey; |
1da177e4 | 1439 | |
8faea9fd JG |
1440 | device->port_data[port].cache.pkey = pkey_cache; |
1441 | device->port_data[port].cache.lmc = tprops->lmc; | |
1442 | device->port_data[port].cache.port_state = tprops->state; | |
6fb9cdbf | 1443 | |
8faea9fd | 1444 | device->port_data[port].cache.subnet_prefix = tprops->subnet_prefix; |
1da177e4 LT |
1445 | write_unlock_irq(&device->cache.lock); |
1446 | ||
d291f1a6 DJ |
1447 | if (enforce_security) |
1448 | ib_security_cache_change(device, | |
1449 | port, | |
1450 | tprops->subnet_prefix); | |
1451 | ||
1da177e4 | 1452 | kfree(old_pkey_cache); |
1da177e4 LT |
1453 | kfree(tprops); |
1454 | return; | |
1455 | ||
1456 | err: | |
1457 | kfree(pkey_cache); | |
1da177e4 LT |
1458 | kfree(tprops); |
1459 | } | |
1460 | ||
c4028958 | 1461 | static void ib_cache_task(struct work_struct *_work) |
1da177e4 | 1462 | { |
c4028958 DH |
1463 | struct ib_update_work *work = |
1464 | container_of(_work, struct ib_update_work, work); | |
1da177e4 | 1465 | |
d291f1a6 DJ |
1466 | ib_cache_update(work->device, |
1467 | work->port_num, | |
1468 | work->enforce_security); | |
1da177e4 LT |
1469 | kfree(work); |
1470 | } | |
1471 | ||
1472 | static void ib_cache_event(struct ib_event_handler *handler, | |
1473 | struct ib_event *event) | |
1474 | { | |
1475 | struct ib_update_work *work; | |
1476 | ||
1477 | if (event->event == IB_EVENT_PORT_ERR || | |
1478 | event->event == IB_EVENT_PORT_ACTIVE || | |
1479 | event->event == IB_EVENT_LID_CHANGE || | |
1480 | event->event == IB_EVENT_PKEY_CHANGE || | |
761d90ed OG |
1481 | event->event == IB_EVENT_CLIENT_REREGISTER || |
1482 | event->event == IB_EVENT_GID_CHANGE) { | |
1da177e4 LT |
1483 | work = kmalloc(sizeof *work, GFP_ATOMIC); |
1484 | if (work) { | |
c4028958 | 1485 | INIT_WORK(&work->work, ib_cache_task); |
1da177e4 LT |
1486 | work->device = event->device; |
1487 | work->port_num = event->element.port_num; | |
d291f1a6 DJ |
1488 | if (event->event == IB_EVENT_PKEY_CHANGE || |
1489 | event->event == IB_EVENT_GID_CHANGE) | |
1490 | work->enforce_security = true; | |
1491 | else | |
1492 | work->enforce_security = false; | |
1493 | ||
f0626710 | 1494 | queue_work(ib_wq, &work->work); |
1da177e4 LT |
1495 | } |
1496 | } | |
1497 | } | |
1498 | ||
03db3a2d | 1499 | int ib_cache_setup_one(struct ib_device *device) |
1da177e4 | 1500 | { |
ea1075ed | 1501 | unsigned int p; |
03db3a2d | 1502 | int err; |
1da177e4 LT |
1503 | |
1504 | rwlock_init(&device->cache.lock); | |
1505 | ||
03db3a2d | 1506 | err = gid_table_setup_one(device); |
8faea9fd | 1507 | if (err) |
dcc9881e | 1508 | return err; |
03db3a2d | 1509 | |
ea1075ed JG |
1510 | rdma_for_each_port (device, p) |
1511 | ib_cache_update(device, p, true); | |
1da177e4 LT |
1512 | |
1513 | INIT_IB_EVENT_HANDLER(&device->cache.event_handler, | |
1514 | device, ib_cache_event); | |
dcc9881e | 1515 | ib_register_event_handler(&device->cache.event_handler); |
03db3a2d | 1516 | return 0; |
1da177e4 LT |
1517 | } |
1518 | ||
03db3a2d | 1519 | void ib_cache_release_one(struct ib_device *device) |
1da177e4 | 1520 | { |
8faea9fd | 1521 | unsigned int p; |
d45f89d5 | 1522 | |
03db3a2d MB |
1523 | /* |
1524 | * The release function frees all the cache elements. | |
1525 | * This function should be called as part of freeing | |
1526 | * all the device's resources when the cache could no | |
1527 | * longer be accessed. | |
1528 | */ | |
8faea9fd JG |
1529 | rdma_for_each_port (device, p) |
1530 | kfree(device->port_data[p].cache.pkey); | |
03db3a2d MB |
1531 | |
1532 | gid_table_release_one(device); | |
1da177e4 LT |
1533 | } |
1534 | ||
03db3a2d MB |
1535 | void ib_cache_cleanup_one(struct ib_device *device) |
1536 | { | |
1537 | /* The cleanup function unregisters the event handler, | |
1538 | * waits for all in-progress workqueue elements and cleans | |
1539 | * up the GID cache. This function should be called after | |
1540 | * the device was removed from the devices list and all | |
1541 | * clients were removed, so the cache exists but is | |
1542 | * non-functional and shouldn't be updated anymore. | |
1543 | */ | |
1544 | ib_unregister_event_handler(&device->cache.event_handler); | |
1545 | flush_workqueue(ib_wq); | |
1546 | gid_table_cleanup_one(device); | |
b150c386 PP |
1547 | |
1548 | /* | |
1549 | * Flush the wq second time for any pending GID delete work. | |
1550 | */ | |
1551 | flush_workqueue(ib_wq); | |
03db3a2d | 1552 | } |