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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; | |
5b361328 | 49 | u16 table[]; |
1da177e4 LT |
50 | }; |
51 | ||
1da177e4 LT |
52 | struct ib_update_work { |
53 | struct work_struct work; | |
6b57cea9 PP |
54 | struct ib_event event; |
55 | bool enforce_security; | |
1da177e4 LT |
56 | }; |
57 | ||
e26be1bf MS |
58 | union ib_gid zgid; |
59 | EXPORT_SYMBOL(zgid); | |
03db3a2d | 60 | |
03db3a2d MB |
61 | enum 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, | |
b39ffa1d | 65 | GID_ATTR_FIND_MASK_GID_TYPE = 1UL << 3, |
03db3a2d MB |
66 | }; |
67 | ||
b150c386 PP |
68 | enum 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, | |
03db3a2d MB |
78 | }; |
79 | ||
943bd984 PP |
80 | struct roce_gid_ndev_storage { |
81 | struct rcu_head rcu_head; | |
82 | struct net_device *ndev; | |
83 | }; | |
84 | ||
03db3a2d | 85 | struct ib_gid_table_entry { |
b150c386 PP |
86 | struct kref kref; |
87 | struct work_struct del_work; | |
88 | struct ib_gid_attr attr; | |
89 | void *context; | |
943bd984 PP |
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; | |
b150c386 | 96 | enum gid_table_entry_state state; |
03db3a2d MB |
97 | }; |
98 | ||
99 | struct ib_gid_table { | |
1c36cf91 | 100 | int sz; |
03db3a2d MB |
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 | * | |
03db3a2d | 110 | **/ |
598ff6ba | 111 | /* Any writer to data_vec must hold this lock and the write side of |
b150c386 | 112 | * rwlock. Readers must hold only rwlock. All writers must be in a |
598ff6ba | 113 | * sleepable context. |
9c584f04 | 114 | */ |
1c36cf91 | 115 | struct mutex lock; |
b150c386 PP |
116 | /* rwlock protects data_vec[ix]->state and entry pointer. |
117 | */ | |
1c36cf91 | 118 | rwlock_t rwlock; |
b150c386 | 119 | struct ib_gid_table_entry **data_vec; |
1c36cf91 PP |
120 | /* bit field, each bit indicates the index of default GID */ |
121 | u32 default_gid_indices; | |
03db3a2d MB |
122 | }; |
123 | ||
f3906bd3 MB |
124 | static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port) |
125 | { | |
3401857e | 126 | struct ib_event event; |
f3906bd3 | 127 | |
3401857e PP |
128 | event.device = ib_dev; |
129 | event.element.port_num = port; | |
130 | event.event = IB_EVENT_GID_CHANGE; | |
f3906bd3 | 131 | |
6b57cea9 | 132 | ib_dispatch_event_clients(&event); |
f3906bd3 MB |
133 | } |
134 | ||
b39ffa1d MB |
135 | static const char * const gid_type_str[] = { |
136 | [IB_GID_TYPE_IB] = "IB/RoCE v1", | |
7766a99f | 137 | [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2", |
b39ffa1d MB |
138 | }; |
139 | ||
140 | const char *ib_cache_gid_type_str(enum ib_gid_type gid_type) | |
141 | { | |
142 | if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type]) | |
143 | return gid_type_str[gid_type]; | |
144 | ||
145 | return "Invalid GID type"; | |
146 | } | |
147 | EXPORT_SYMBOL(ib_cache_gid_type_str); | |
148 | ||
25e62655 PP |
149 | /** rdma_is_zero_gid - Check if given GID is zero or not. |
150 | * @gid: GID to check | |
151 | * Returns true if given GID is zero, returns false otherwise. | |
152 | */ | |
153 | bool rdma_is_zero_gid(const union ib_gid *gid) | |
154 | { | |
155 | return !memcmp(gid, &zgid, sizeof(*gid)); | |
156 | } | |
157 | EXPORT_SYMBOL(rdma_is_zero_gid); | |
158 | ||
1c36cf91 PP |
159 | /** is_gid_index_default - Check if a given index belongs to |
160 | * reserved default GIDs or not. | |
161 | * @table: GID table pointer | |
162 | * @index: Index to check in GID table | |
163 | * Returns true if index is one of the reserved default GID index otherwise | |
164 | * returns false. | |
165 | */ | |
166 | static bool is_gid_index_default(const struct ib_gid_table *table, | |
167 | unsigned int index) | |
168 | { | |
169 | return index < 32 && (BIT(index) & table->default_gid_indices); | |
170 | } | |
171 | ||
045959db MB |
172 | int ib_cache_gid_parse_type_str(const char *buf) |
173 | { | |
174 | unsigned int i; | |
175 | size_t len; | |
176 | int err = -EINVAL; | |
177 | ||
178 | len = strlen(buf); | |
179 | if (len == 0) | |
180 | return -EINVAL; | |
181 | ||
182 | if (buf[len - 1] == '\n') | |
183 | len--; | |
184 | ||
185 | for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i) | |
186 | if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) && | |
187 | len == strlen(gid_type_str[i])) { | |
188 | err = i; | |
189 | break; | |
190 | } | |
191 | ||
192 | return err; | |
193 | } | |
194 | EXPORT_SYMBOL(ib_cache_gid_parse_type_str); | |
195 | ||
724631a9 PP |
196 | static struct ib_gid_table *rdma_gid_table(struct ib_device *device, u8 port) |
197 | { | |
8faea9fd | 198 | return device->port_data[port].cache.gid; |
724631a9 PP |
199 | } |
200 | ||
b150c386 PP |
201 | static bool is_gid_entry_free(const struct ib_gid_table_entry *entry) |
202 | { | |
203 | return !entry; | |
204 | } | |
205 | ||
206 | static bool is_gid_entry_valid(const struct ib_gid_table_entry *entry) | |
207 | { | |
208 | return entry && entry->state == GID_TABLE_ENTRY_VALID; | |
209 | } | |
210 | ||
211 | static void schedule_free_gid(struct kref *kref) | |
212 | { | |
213 | struct ib_gid_table_entry *entry = | |
214 | container_of(kref, struct ib_gid_table_entry, kref); | |
215 | ||
216 | queue_work(ib_wq, &entry->del_work); | |
217 | } | |
218 | ||
943bd984 PP |
219 | static void put_gid_ndev(struct rcu_head *head) |
220 | { | |
221 | struct roce_gid_ndev_storage *storage = | |
222 | container_of(head, struct roce_gid_ndev_storage, rcu_head); | |
223 | ||
224 | WARN_ON(!storage->ndev); | |
225 | /* At this point its safe to release netdev reference, | |
226 | * as all callers working on gid_attr->ndev are done | |
227 | * using this netdev. | |
228 | */ | |
229 | dev_put(storage->ndev); | |
230 | kfree(storage); | |
231 | } | |
232 | ||
59d40813 | 233 | static void free_gid_entry_locked(struct ib_gid_table_entry *entry) |
1da177e4 | 234 | { |
b150c386 PP |
235 | struct ib_device *device = entry->attr.device; |
236 | u8 port_num = entry->attr.port_num; | |
237 | struct ib_gid_table *table = rdma_gid_table(device, port_num); | |
238 | ||
43c7c851 JG |
239 | dev_dbg(&device->dev, "%s port=%d index=%d gid %pI6\n", __func__, |
240 | port_num, entry->attr.index, entry->attr.gid.raw); | |
b150c386 | 241 | |
b150c386 | 242 | write_lock_irq(&table->rwlock); |
598ff6ba | 243 | |
b150c386 PP |
244 | /* |
245 | * The only way to avoid overwriting NULL in table is | |
246 | * by comparing if it is same entry in table or not! | |
247 | * If new entry in table is added by the time we free here, | |
248 | * don't overwrite the table entry. | |
249 | */ | |
250 | if (entry == table->data_vec[entry->attr.index]) | |
251 | table->data_vec[entry->attr.index] = NULL; | |
252 | /* Now this index is ready to be allocated */ | |
253 | write_unlock_irq(&table->rwlock); | |
b150c386 | 254 | |
943bd984 PP |
255 | if (entry->ndev_storage) |
256 | call_rcu(&entry->ndev_storage->rcu_head, put_gid_ndev); | |
b150c386 PP |
257 | kfree(entry); |
258 | } | |
259 | ||
59d40813 PP |
260 | static void free_gid_entry(struct kref *kref) |
261 | { | |
262 | struct ib_gid_table_entry *entry = | |
263 | container_of(kref, struct ib_gid_table_entry, kref); | |
264 | ||
265 | free_gid_entry_locked(entry); | |
266 | } | |
267 | ||
b150c386 PP |
268 | /** |
269 | * free_gid_work - Release reference to the GID entry | |
270 | * @work: Work structure to refer to GID entry which needs to be | |
271 | * deleted. | |
272 | * | |
273 | * free_gid_work() frees the entry from the HCA's hardware table | |
274 | * if provider supports it. It releases reference to netdevice. | |
275 | */ | |
276 | static void free_gid_work(struct work_struct *work) | |
277 | { | |
278 | struct ib_gid_table_entry *entry = | |
279 | container_of(work, struct ib_gid_table_entry, del_work); | |
59d40813 PP |
280 | struct ib_device *device = entry->attr.device; |
281 | u8 port_num = entry->attr.port_num; | |
282 | struct ib_gid_table *table = rdma_gid_table(device, port_num); | |
283 | ||
284 | mutex_lock(&table->lock); | |
285 | free_gid_entry_locked(entry); | |
286 | mutex_unlock(&table->lock); | |
598ff6ba | 287 | } |
03db3a2d | 288 | |
b150c386 PP |
289 | static struct ib_gid_table_entry * |
290 | alloc_gid_entry(const struct ib_gid_attr *attr) | |
598ff6ba PP |
291 | { |
292 | struct ib_gid_table_entry *entry; | |
943bd984 | 293 | struct net_device *ndev; |
b150c386 PP |
294 | |
295 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); | |
296 | if (!entry) | |
297 | return NULL; | |
943bd984 PP |
298 | |
299 | ndev = rcu_dereference_protected(attr->ndev, 1); | |
300 | if (ndev) { | |
301 | entry->ndev_storage = kzalloc(sizeof(*entry->ndev_storage), | |
302 | GFP_KERNEL); | |
303 | if (!entry->ndev_storage) { | |
304 | kfree(entry); | |
305 | return NULL; | |
306 | } | |
307 | dev_hold(ndev); | |
308 | entry->ndev_storage->ndev = ndev; | |
309 | } | |
b150c386 PP |
310 | kref_init(&entry->kref); |
311 | memcpy(&entry->attr, attr, sizeof(*attr)); | |
b150c386 PP |
312 | INIT_WORK(&entry->del_work, free_gid_work); |
313 | entry->state = GID_TABLE_ENTRY_INVALID; | |
314 | return entry; | |
315 | } | |
316 | ||
317 | static void store_gid_entry(struct ib_gid_table *table, | |
318 | struct ib_gid_table_entry *entry) | |
319 | { | |
320 | entry->state = GID_TABLE_ENTRY_VALID; | |
321 | ||
43c7c851 JG |
322 | dev_dbg(&entry->attr.device->dev, "%s port=%d index=%d gid %pI6\n", |
323 | __func__, entry->attr.port_num, entry->attr.index, | |
324 | entry->attr.gid.raw); | |
b150c386 PP |
325 | |
326 | lockdep_assert_held(&table->lock); | |
327 | write_lock_irq(&table->rwlock); | |
328 | table->data_vec[entry->attr.index] = entry; | |
329 | write_unlock_irq(&table->rwlock); | |
330 | } | |
331 | ||
bf399c2c PP |
332 | static void get_gid_entry(struct ib_gid_table_entry *entry) |
333 | { | |
334 | kref_get(&entry->kref); | |
335 | } | |
336 | ||
b150c386 PP |
337 | static void put_gid_entry(struct ib_gid_table_entry *entry) |
338 | { | |
339 | kref_put(&entry->kref, schedule_free_gid); | |
340 | } | |
341 | ||
59d40813 PP |
342 | static void put_gid_entry_locked(struct ib_gid_table_entry *entry) |
343 | { | |
344 | kref_put(&entry->kref, free_gid_entry); | |
345 | } | |
346 | ||
b150c386 PP |
347 | static int add_roce_gid(struct ib_gid_table_entry *entry) |
348 | { | |
349 | const struct ib_gid_attr *attr = &entry->attr; | |
350 | int ret; | |
03db3a2d | 351 | |
598ff6ba | 352 | if (!attr->ndev) { |
43c7c851 JG |
353 | dev_err(&attr->device->dev, "%s NULL netdev port=%d index=%d\n", |
354 | __func__, attr->port_num, attr->index); | |
598ff6ba | 355 | return -EINVAL; |
03db3a2d | 356 | } |
598ff6ba | 357 | if (rdma_cap_roce_gid_table(attr->device, attr->port_num)) { |
3023a1e9 | 358 | ret = attr->device->ops.add_gid(attr, &entry->context); |
598ff6ba | 359 | if (ret) { |
43c7c851 JG |
360 | dev_err(&attr->device->dev, |
361 | "%s GID add failed port=%d index=%d\n", | |
362 | __func__, attr->port_num, attr->index); | |
b150c386 | 363 | return ret; |
598ff6ba | 364 | } |
8e787646 | 365 | } |
b150c386 | 366 | return 0; |
03db3a2d MB |
367 | } |
368 | ||
5c5702e2 PP |
369 | /** |
370 | * del_gid - Delete GID table entry | |
371 | * | |
372 | * @ib_dev: IB device whose GID entry to be deleted | |
373 | * @port: Port number of the IB device | |
374 | * @table: GID table of the IB device for a port | |
375 | * @ix: GID entry index to delete | |
376 | * | |
377 | */ | |
378 | static void del_gid(struct ib_device *ib_dev, u8 port, | |
379 | struct ib_gid_table *table, int ix) | |
380 | { | |
943bd984 | 381 | struct roce_gid_ndev_storage *ndev_storage; |
5c5702e2 PP |
382 | struct ib_gid_table_entry *entry; |
383 | ||
384 | lockdep_assert_held(&table->lock); | |
385 | ||
59bfc59a JG |
386 | dev_dbg(&ib_dev->dev, "%s port=%d index=%d gid %pI6\n", __func__, port, |
387 | ix, table->data_vec[ix]->attr.gid.raw); | |
5c5702e2 PP |
388 | |
389 | write_lock_irq(&table->rwlock); | |
390 | entry = table->data_vec[ix]; | |
391 | entry->state = GID_TABLE_ENTRY_PENDING_DEL; | |
392 | /* | |
393 | * For non RoCE protocol, GID entry slot is ready to use. | |
394 | */ | |
395 | if (!rdma_protocol_roce(ib_dev, port)) | |
396 | table->data_vec[ix] = NULL; | |
397 | write_unlock_irq(&table->rwlock); | |
398 | ||
943bd984 PP |
399 | ndev_storage = entry->ndev_storage; |
400 | if (ndev_storage) { | |
401 | entry->ndev_storage = NULL; | |
402 | rcu_assign_pointer(entry->attr.ndev, NULL); | |
403 | call_rcu(&ndev_storage->rcu_head, put_gid_ndev); | |
404 | } | |
405 | ||
be5914c1 PP |
406 | if (rdma_cap_roce_gid_table(ib_dev, port)) |
407 | ib_dev->ops.del_gid(&entry->attr, &entry->context); | |
408 | ||
5c5702e2 PP |
409 | put_gid_entry_locked(entry); |
410 | } | |
411 | ||
598ff6ba PP |
412 | /** |
413 | * add_modify_gid - Add or modify GID table entry | |
414 | * | |
415 | * @table: GID table in which GID to be added or modified | |
598ff6ba PP |
416 | * @attr: Attributes of the GID |
417 | * | |
418 | * Returns 0 on success or appropriate error code. It accepts zero | |
419 | * GID addition for non RoCE ports for HCA's who report them as valid | |
420 | * GID. However such zero GIDs are not added to the cache. | |
421 | */ | |
422 | static int add_modify_gid(struct ib_gid_table *table, | |
598ff6ba PP |
423 | const struct ib_gid_attr *attr) |
424 | { | |
b150c386 PP |
425 | struct ib_gid_table_entry *entry; |
426 | int ret = 0; | |
427 | ||
428 | /* | |
429 | * Invalidate any old entry in the table to make it safe to write to | |
430 | * this index. | |
431 | */ | |
432 | if (is_gid_entry_valid(table->data_vec[attr->index])) | |
5c5702e2 | 433 | del_gid(attr->device, attr->port_num, table, attr->index); |
b150c386 PP |
434 | |
435 | /* | |
436 | * Some HCA's report multiple GID entries with only one valid GID, and | |
437 | * leave other unused entries as the zero GID. Convert zero GIDs to | |
438 | * empty table entries instead of storing them. | |
439 | */ | |
440 | if (rdma_is_zero_gid(&attr->gid)) | |
441 | return 0; | |
442 | ||
443 | entry = alloc_gid_entry(attr); | |
444 | if (!entry) | |
445 | return -ENOMEM; | |
598ff6ba PP |
446 | |
447 | if (rdma_protocol_roce(attr->device, attr->port_num)) { | |
b150c386 | 448 | ret = add_roce_gid(entry); |
598ff6ba | 449 | if (ret) |
b150c386 | 450 | goto done; |
598ff6ba PP |
451 | } |
452 | ||
b150c386 | 453 | store_gid_entry(table, entry); |
598ff6ba | 454 | return 0; |
b150c386 PP |
455 | |
456 | done: | |
457 | put_gid_entry(entry); | |
458 | return ret; | |
03db3a2d MB |
459 | } |
460 | ||
598ff6ba | 461 | /* rwlock should be read locked, or lock should be held */ |
03db3a2d MB |
462 | static int find_gid(struct ib_gid_table *table, const union ib_gid *gid, |
463 | const struct ib_gid_attr *val, bool default_gid, | |
cee3c4d0 | 464 | unsigned long mask, int *pempty) |
03db3a2d | 465 | { |
cee3c4d0 MB |
466 | int i = 0; |
467 | int found = -1; | |
468 | int empty = pempty ? -1 : 0; | |
03db3a2d | 469 | |
cee3c4d0 | 470 | while (i < table->sz && (found < 0 || empty < 0)) { |
b150c386 PP |
471 | struct ib_gid_table_entry *data = table->data_vec[i]; |
472 | struct ib_gid_attr *attr; | |
cee3c4d0 | 473 | int curr_index = i; |
03db3a2d | 474 | |
cee3c4d0 | 475 | i++; |
03db3a2d | 476 | |
598ff6ba PP |
477 | /* find_gid() is used during GID addition where it is expected |
478 | * to return a free entry slot which is not duplicate. | |
479 | * Free entry slot is requested and returned if pempty is set, | |
480 | * so lookup free slot only if requested. | |
481 | */ | |
482 | if (pempty && empty < 0) { | |
b150c386 PP |
483 | if (is_gid_entry_free(data) && |
484 | default_gid == | |
485 | is_gid_index_default(table, curr_index)) { | |
a66ed149 PP |
486 | /* |
487 | * Found an invalid (free) entry; allocate it. | |
488 | * If default GID is requested, then our | |
489 | * found slot must be one of the DEFAULT | |
490 | * reserved slots or we fail. | |
491 | * This ensures that only DEFAULT reserved | |
492 | * slots are used for default property GIDs. | |
493 | */ | |
494 | empty = curr_index; | |
598ff6ba PP |
495 | } |
496 | } | |
497 | ||
498 | /* | |
499 | * Additionally find_gid() is used to find valid entry during | |
b150c386 PP |
500 | * lookup operation; so ignore the entries which are marked as |
501 | * pending for removal and the entries which are marked as | |
502 | * invalid. | |
598ff6ba | 503 | */ |
b150c386 | 504 | if (!is_gid_entry_valid(data)) |
cee3c4d0 MB |
505 | continue; |
506 | ||
cee3c4d0 | 507 | if (found >= 0) |
9c584f04 | 508 | continue; |
03db3a2d | 509 | |
b150c386 | 510 | attr = &data->attr; |
b39ffa1d MB |
511 | if (mask & GID_ATTR_FIND_MASK_GID_TYPE && |
512 | attr->gid_type != val->gid_type) | |
513 | continue; | |
514 | ||
03db3a2d | 515 | if (mask & GID_ATTR_FIND_MASK_GID && |
b150c386 | 516 | memcmp(gid, &data->attr.gid, sizeof(*gid))) |
9c584f04 | 517 | continue; |
03db3a2d MB |
518 | |
519 | if (mask & GID_ATTR_FIND_MASK_NETDEV && | |
520 | attr->ndev != val->ndev) | |
9c584f04 | 521 | continue; |
03db3a2d MB |
522 | |
523 | if (mask & GID_ATTR_FIND_MASK_DEFAULT && | |
1c36cf91 | 524 | is_gid_index_default(table, curr_index) != default_gid) |
9c584f04 | 525 | continue; |
03db3a2d | 526 | |
cee3c4d0 | 527 | found = curr_index; |
03db3a2d MB |
528 | } |
529 | ||
cee3c4d0 MB |
530 | if (pempty) |
531 | *pempty = empty; | |
532 | ||
533 | return found; | |
03db3a2d MB |
534 | } |
535 | ||
536 | static void make_default_gid(struct net_device *dev, union ib_gid *gid) | |
537 | { | |
538 | gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); | |
539 | addrconf_ifid_eui48(&gid->raw[8], dev); | |
540 | } | |
541 | ||
598ff6ba PP |
542 | static int __ib_cache_gid_add(struct ib_device *ib_dev, u8 port, |
543 | union ib_gid *gid, struct ib_gid_attr *attr, | |
544 | unsigned long mask, bool default_gid) | |
03db3a2d | 545 | { |
03db3a2d | 546 | struct ib_gid_table *table; |
1da177e4 | 547 | int ret = 0; |
cee3c4d0 | 548 | int empty; |
598ff6ba | 549 | int ix; |
1da177e4 | 550 | |
598ff6ba PP |
551 | /* Do not allow adding zero GID in support of |
552 | * IB spec version 1.3 section 4.1.1 point (6) and | |
553 | * section 12.7.10 and section 12.7.20 | |
554 | */ | |
25e62655 | 555 | if (rdma_is_zero_gid(gid)) |
1da177e4 LT |
556 | return -EINVAL; |
557 | ||
724631a9 | 558 | table = rdma_gid_table(ib_dev, port); |
598ff6ba PP |
559 | |
560 | mutex_lock(&table->lock); | |
561 | ||
562 | ix = find_gid(table, gid, attr, default_gid, mask, &empty); | |
563 | if (ix >= 0) | |
564 | goto out_unlock; | |
565 | ||
566 | if (empty < 0) { | |
567 | ret = -ENOSPC; | |
568 | goto out_unlock; | |
569 | } | |
570 | attr->device = ib_dev; | |
571 | attr->index = empty; | |
572 | attr->port_num = port; | |
b150c386 PP |
573 | attr->gid = *gid; |
574 | ret = add_modify_gid(table, attr); | |
598ff6ba PP |
575 | if (!ret) |
576 | dispatch_gid_change_event(ib_dev, port); | |
577 | ||
578 | out_unlock: | |
579 | mutex_unlock(&table->lock); | |
580 | if (ret) | |
581 | pr_warn("%s: unable to add gid %pI6 error=%d\n", | |
582 | __func__, gid->raw, ret); | |
583 | return ret; | |
584 | } | |
585 | ||
586 | int ib_cache_gid_add(struct ib_device *ib_dev, u8 port, | |
587 | union ib_gid *gid, struct ib_gid_attr *attr) | |
588 | { | |
823b23da PP |
589 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
590 | GID_ATTR_FIND_MASK_GID_TYPE | | |
591 | GID_ATTR_FIND_MASK_NETDEV; | |
c2261dd7 | 592 | |
823b23da | 593 | return __ib_cache_gid_add(ib_dev, port, gid, attr, mask, false); |
1da177e4 | 594 | } |
1da177e4 | 595 | |
22c01ee4 PP |
596 | static int |
597 | _ib_cache_gid_del(struct ib_device *ib_dev, u8 port, | |
598 | union ib_gid *gid, struct ib_gid_attr *attr, | |
dc5640f2 | 599 | unsigned long mask, bool default_gid) |
1da177e4 | 600 | { |
03db3a2d | 601 | struct ib_gid_table *table; |
598ff6ba | 602 | int ret = 0; |
03db3a2d MB |
603 | int ix; |
604 | ||
724631a9 | 605 | table = rdma_gid_table(ib_dev, port); |
03db3a2d MB |
606 | |
607 | mutex_lock(&table->lock); | |
608 | ||
dc5640f2 | 609 | ix = find_gid(table, gid, attr, default_gid, mask, NULL); |
598ff6ba PP |
610 | if (ix < 0) { |
611 | ret = -EINVAL; | |
03db3a2d | 612 | goto out_unlock; |
598ff6ba | 613 | } |
03db3a2d | 614 | |
598ff6ba PP |
615 | del_gid(ib_dev, port, table, ix); |
616 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
617 | |
618 | out_unlock: | |
619 | mutex_unlock(&table->lock); | |
598ff6ba PP |
620 | if (ret) |
621 | pr_debug("%s: can't delete gid %pI6 error=%d\n", | |
622 | __func__, gid->raw, ret); | |
623 | return ret; | |
03db3a2d MB |
624 | } |
625 | ||
22c01ee4 PP |
626 | int ib_cache_gid_del(struct ib_device *ib_dev, u8 port, |
627 | union ib_gid *gid, struct ib_gid_attr *attr) | |
628 | { | |
dc5640f2 PP |
629 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
630 | GID_ATTR_FIND_MASK_GID_TYPE | | |
631 | GID_ATTR_FIND_MASK_DEFAULT | | |
632 | GID_ATTR_FIND_MASK_NETDEV; | |
633 | ||
634 | return _ib_cache_gid_del(ib_dev, port, gid, attr, mask, false); | |
22c01ee4 PP |
635 | } |
636 | ||
03db3a2d MB |
637 | int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, |
638 | struct net_device *ndev) | |
639 | { | |
03db3a2d MB |
640 | struct ib_gid_table *table; |
641 | int ix; | |
9c584f04 | 642 | bool deleted = false; |
03db3a2d | 643 | |
724631a9 | 644 | table = rdma_gid_table(ib_dev, port); |
03db3a2d MB |
645 | |
646 | mutex_lock(&table->lock); | |
647 | ||
598ff6ba | 648 | for (ix = 0; ix < table->sz; ix++) { |
b150c386 PP |
649 | if (is_gid_entry_valid(table->data_vec[ix]) && |
650 | table->data_vec[ix]->attr.ndev == ndev) { | |
598ff6ba PP |
651 | del_gid(ib_dev, port, table, ix); |
652 | deleted = true; | |
653 | } | |
654 | } | |
03db3a2d MB |
655 | |
656 | mutex_unlock(&table->lock); | |
9c584f04 MB |
657 | |
658 | if (deleted) | |
659 | dispatch_gid_change_event(ib_dev, port); | |
660 | ||
03db3a2d MB |
661 | return 0; |
662 | } | |
663 | ||
6612b498 | 664 | /** |
c3d71b69 JG |
665 | * rdma_find_gid_by_port - Returns the GID entry attributes when it finds |
666 | * a valid GID entry for given search parameters. It searches for the specified | |
667 | * GID value in the local software cache. | |
6612b498 PP |
668 | * @device: The device to query. |
669 | * @gid: The GID value to search for. | |
670 | * @gid_type: The GID type to search for. | |
671 | * @port_num: The port number of the device where the GID value should be | |
672 | * searched. | |
c3d71b69 JG |
673 | * @ndev: In RoCE, the net device of the device. NULL means ignore. |
674 | * | |
675 | * Returns sgid attributes if the GID is found with valid reference or | |
676 | * returns ERR_PTR for the error. | |
677 | * The caller must invoke rdma_put_gid_attr() to release the reference. | |
6612b498 | 678 | */ |
c3d71b69 JG |
679 | const struct ib_gid_attr * |
680 | rdma_find_gid_by_port(struct ib_device *ib_dev, | |
681 | const union ib_gid *gid, | |
682 | enum ib_gid_type gid_type, | |
683 | u8 port, struct net_device *ndev) | |
03db3a2d MB |
684 | { |
685 | int local_index; | |
03db3a2d | 686 | struct ib_gid_table *table; |
b39ffa1d MB |
687 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
688 | GID_ATTR_FIND_MASK_GID_TYPE; | |
689 | struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type}; | |
c3d71b69 | 690 | const struct ib_gid_attr *attr; |
9c584f04 | 691 | unsigned long flags; |
03db3a2d | 692 | |
24dc831b | 693 | if (!rdma_is_port_valid(ib_dev, port)) |
c3d71b69 | 694 | return ERR_PTR(-ENOENT); |
03db3a2d | 695 | |
724631a9 | 696 | table = rdma_gid_table(ib_dev, port); |
03db3a2d MB |
697 | |
698 | if (ndev) | |
699 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
700 | ||
9c584f04 | 701 | read_lock_irqsave(&table->rwlock, flags); |
cee3c4d0 | 702 | local_index = find_gid(table, gid, &val, false, mask, NULL); |
03db3a2d | 703 | if (local_index >= 0) { |
c3d71b69 JG |
704 | get_gid_entry(table->data_vec[local_index]); |
705 | attr = &table->data_vec[local_index]->attr; | |
9c584f04 | 706 | read_unlock_irqrestore(&table->rwlock, flags); |
c3d71b69 | 707 | return attr; |
03db3a2d MB |
708 | } |
709 | ||
9c584f04 | 710 | read_unlock_irqrestore(&table->rwlock, flags); |
c3d71b69 | 711 | return ERR_PTR(-ENOENT); |
03db3a2d | 712 | } |
c3d71b69 | 713 | EXPORT_SYMBOL(rdma_find_gid_by_port); |
03db3a2d | 714 | |
99b27e3b | 715 | /** |
c3d71b69 JG |
716 | * rdma_find_gid_by_filter - Returns the GID table attribute where a |
717 | * specified GID value occurs | |
99b27e3b MB |
718 | * @device: The device to query. |
719 | * @gid: The GID value to search for. | |
c3d71b69 | 720 | * @port: The port number of the device where the GID value could be |
99b27e3b MB |
721 | * searched. |
722 | * @filter: The filter function is executed on any matching GID in the table. | |
723 | * If the filter function returns true, the corresponding index is returned, | |
724 | * otherwise, we continue searching the GID table. It's guaranteed that | |
725 | * while filter is executed, ndev field is valid and the structure won't | |
726 | * change. filter is executed in an atomic context. filter must not be NULL. | |
99b27e3b | 727 | * |
c3d71b69 | 728 | * rdma_find_gid_by_filter() searches for the specified GID value |
99b27e3b | 729 | * of which the filter function returns true in the port's GID table. |
99b27e3b MB |
730 | * |
731 | */ | |
c3d71b69 JG |
732 | const struct ib_gid_attr *rdma_find_gid_by_filter( |
733 | struct ib_device *ib_dev, const union ib_gid *gid, u8 port, | |
734 | bool (*filter)(const union ib_gid *gid, const struct ib_gid_attr *, | |
735 | void *), | |
736 | void *context) | |
99b27e3b | 737 | { |
c3d71b69 | 738 | const struct ib_gid_attr *res = ERR_PTR(-ENOENT); |
99b27e3b | 739 | struct ib_gid_table *table; |
9c584f04 | 740 | unsigned long flags; |
c3d71b69 | 741 | unsigned int i; |
99b27e3b | 742 | |
83f6f8d2 JG |
743 | if (!rdma_is_port_valid(ib_dev, port)) |
744 | return ERR_PTR(-EINVAL); | |
99b27e3b | 745 | |
724631a9 | 746 | table = rdma_gid_table(ib_dev, port); |
99b27e3b | 747 | |
9c584f04 | 748 | read_lock_irqsave(&table->rwlock, flags); |
99b27e3b | 749 | for (i = 0; i < table->sz; i++) { |
83f6f8d2 | 750 | struct ib_gid_table_entry *entry = table->data_vec[i]; |
99b27e3b | 751 | |
83f6f8d2 | 752 | if (!is_gid_entry_valid(entry)) |
151ed9d7 | 753 | continue; |
99b27e3b | 754 | |
83f6f8d2 | 755 | if (memcmp(gid, &entry->attr.gid, sizeof(*gid))) |
151ed9d7 | 756 | continue; |
99b27e3b | 757 | |
83f6f8d2 JG |
758 | if (filter(gid, &entry->attr, context)) { |
759 | get_gid_entry(entry); | |
760 | res = &entry->attr; | |
99b27e3b | 761 | break; |
151ed9d7 | 762 | } |
99b27e3b | 763 | } |
9c584f04 | 764 | read_unlock_irqrestore(&table->rwlock, flags); |
c3d71b69 JG |
765 | return res; |
766 | } | |
767 | ||
03db3a2d MB |
768 | static struct ib_gid_table *alloc_gid_table(int sz) |
769 | { | |
b150c386 | 770 | struct ib_gid_table *table = kzalloc(sizeof(*table), GFP_KERNEL); |
9c584f04 | 771 | |
03db3a2d MB |
772 | if (!table) |
773 | return NULL; | |
774 | ||
775 | table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL); | |
776 | if (!table->data_vec) | |
777 | goto err_free_table; | |
778 | ||
779 | mutex_init(&table->lock); | |
780 | ||
781 | table->sz = sz; | |
9c584f04 | 782 | rwlock_init(&table->rwlock); |
03db3a2d MB |
783 | return table; |
784 | ||
785 | err_free_table: | |
786 | kfree(table); | |
787 | return NULL; | |
788 | } | |
789 | ||
8faea9fd | 790 | static void release_gid_table(struct ib_device *device, |
b150c386 | 791 | struct ib_gid_table *table) |
03db3a2d | 792 | { |
b150c386 PP |
793 | bool leak = false; |
794 | int i; | |
795 | ||
796 | if (!table) | |
797 | return; | |
798 | ||
799 | for (i = 0; i < table->sz; i++) { | |
800 | if (is_gid_entry_free(table->data_vec[i])) | |
801 | continue; | |
802 | if (kref_read(&table->data_vec[i]->kref) > 1) { | |
43c7c851 JG |
803 | dev_err(&device->dev, |
804 | "GID entry ref leak for index %d ref=%d\n", i, | |
805 | kref_read(&table->data_vec[i]->kref)); | |
b150c386 PP |
806 | leak = true; |
807 | } | |
03db3a2d | 808 | } |
b150c386 PP |
809 | if (leak) |
810 | return; | |
811 | ||
56594ae1 | 812 | mutex_destroy(&table->lock); |
b150c386 PP |
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; | |
821 | ||
822 | if (!table) | |
823 | return; | |
824 | ||
598ff6ba | 825 | mutex_lock(&table->lock); |
03db3a2d | 826 | for (i = 0; i < table->sz; ++i) { |
c4c8aff5 | 827 | if (is_gid_entry_valid(table->data_vec[i])) |
598ff6ba | 828 | del_gid(ib_dev, port, table, i); |
03db3a2d | 829 | } |
598ff6ba | 830 | mutex_unlock(&table->lock); |
03db3a2d MB |
831 | } |
832 | ||
833 | void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port, | |
834 | struct net_device *ndev, | |
b39ffa1d | 835 | unsigned long gid_type_mask, |
03db3a2d MB |
836 | enum ib_cache_gid_default_mode mode) |
837 | { | |
dc5640f2 | 838 | union ib_gid gid = { }; |
03db3a2d | 839 | struct ib_gid_attr gid_attr; |
b39ffa1d | 840 | unsigned int gid_type; |
598ff6ba | 841 | unsigned long mask; |
03db3a2d | 842 | |
dc5640f2 PP |
843 | mask = GID_ATTR_FIND_MASK_GID_TYPE | |
844 | GID_ATTR_FIND_MASK_DEFAULT | | |
845 | GID_ATTR_FIND_MASK_NETDEV; | |
03db3a2d MB |
846 | memset(&gid_attr, 0, sizeof(gid_attr)); |
847 | gid_attr.ndev = ndev; | |
848 | ||
b39ffa1d | 849 | for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) { |
b39ffa1d MB |
850 | if (1UL << gid_type & ~gid_type_mask) |
851 | continue; | |
852 | ||
853 | gid_attr.gid_type = gid_type; | |
854 | ||
b39ffa1d | 855 | if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) { |
dc5640f2 | 856 | make_default_gid(ndev, &gid); |
598ff6ba PP |
857 | __ib_cache_gid_add(ib_dev, port, &gid, |
858 | &gid_attr, mask, true); | |
859 | } else if (mode == IB_CACHE_GID_DEFAULT_MODE_DELETE) { | |
dc5640f2 PP |
860 | _ib_cache_gid_del(ib_dev, port, &gid, |
861 | &gid_attr, mask, true); | |
9c584f04 | 862 | } |
b39ffa1d | 863 | } |
03db3a2d MB |
864 | } |
865 | ||
25a1cd3f PP |
866 | static void gid_table_reserve_default(struct ib_device *ib_dev, u8 port, |
867 | struct ib_gid_table *table) | |
03db3a2d | 868 | { |
b39ffa1d MB |
869 | unsigned int i; |
870 | unsigned long roce_gid_type_mask; | |
871 | unsigned int num_default_gids; | |
b39ffa1d MB |
872 | |
873 | roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port); | |
874 | num_default_gids = hweight_long(roce_gid_type_mask); | |
1c36cf91 PP |
875 | /* Reserve starting indices for default GIDs */ |
876 | for (i = 0; i < num_default_gids && i < table->sz; i++) | |
877 | table->default_gid_indices |= BIT(i); | |
03db3a2d | 878 | } |
03db3a2d | 879 | |
be0e8f34 PP |
880 | |
881 | static void gid_table_release_one(struct ib_device *ib_dev) | |
882 | { | |
8faea9fd | 883 | unsigned int p; |
be0e8f34 | 884 | |
8faea9fd JG |
885 | rdma_for_each_port (ib_dev, p) { |
886 | release_gid_table(ib_dev, ib_dev->port_data[p].cache.gid); | |
887 | ib_dev->port_data[p].cache.gid = NULL; | |
be0e8f34 | 888 | } |
03db3a2d MB |
889 | } |
890 | ||
891 | static int _gid_table_setup_one(struct ib_device *ib_dev) | |
892 | { | |
21d6454a | 893 | struct ib_gid_table *table; |
8faea9fd | 894 | unsigned int rdma_port; |
03db3a2d | 895 | |
8faea9fd | 896 | rdma_for_each_port (ib_dev, rdma_port) { |
8ceb1357 JG |
897 | table = alloc_gid_table( |
898 | ib_dev->port_data[rdma_port].immutable.gid_tbl_len); | |
be0e8f34 | 899 | if (!table) |
03db3a2d | 900 | goto rollback_table_setup; |
03db3a2d | 901 | |
25a1cd3f | 902 | gid_table_reserve_default(ib_dev, rdma_port, table); |
8faea9fd | 903 | ib_dev->port_data[rdma_port].cache.gid = table; |
03db3a2d | 904 | } |
03db3a2d MB |
905 | return 0; |
906 | ||
907 | rollback_table_setup: | |
be0e8f34 PP |
908 | gid_table_release_one(ib_dev); |
909 | return -ENOMEM; | |
03db3a2d MB |
910 | } |
911 | ||
912 | static void gid_table_cleanup_one(struct ib_device *ib_dev) | |
913 | { | |
8faea9fd | 914 | unsigned int p; |
03db3a2d | 915 | |
8faea9fd JG |
916 | rdma_for_each_port (ib_dev, p) |
917 | cleanup_gid_table_port(ib_dev, p, | |
918 | ib_dev->port_data[p].cache.gid); | |
03db3a2d MB |
919 | } |
920 | ||
921 | static int gid_table_setup_one(struct ib_device *ib_dev) | |
922 | { | |
923 | int err; | |
924 | ||
925 | err = _gid_table_setup_one(ib_dev); | |
926 | ||
927 | if (err) | |
928 | return err; | |
929 | ||
32f69e4b | 930 | rdma_roce_rescan_device(ib_dev); |
03db3a2d MB |
931 | |
932 | return err; | |
933 | } | |
934 | ||
6612b498 | 935 | /** |
c3d71b69 JG |
936 | * rdma_query_gid - Read the GID content from the GID software cache |
937 | * @device: Device to query the GID | |
938 | * @port_num: Port number of the device | |
939 | * @index: Index of the GID table entry to read | |
940 | * @gid: Pointer to GID where to store the entry's GID | |
941 | * | |
942 | * rdma_query_gid() only reads the GID entry content for requested device, | |
943 | * port and index. It reads for IB, RoCE and iWarp link layers. It doesn't | |
944 | * hold any reference to the GID table entry in the HCA or software cache. | |
945 | * | |
946 | * Returns 0 on success or appropriate error code. | |
947 | * | |
948 | */ | |
949 | int rdma_query_gid(struct ib_device *device, u8 port_num, | |
950 | int index, union ib_gid *gid) | |
951 | { | |
952 | struct ib_gid_table *table; | |
953 | unsigned long flags; | |
954 | int res = -EINVAL; | |
955 | ||
956 | if (!rdma_is_port_valid(device, port_num)) | |
957 | return -EINVAL; | |
958 | ||
959 | table = rdma_gid_table(device, port_num); | |
960 | read_lock_irqsave(&table->rwlock, flags); | |
961 | ||
962 | if (index < 0 || index >= table->sz || | |
963 | !is_gid_entry_valid(table->data_vec[index])) | |
964 | goto done; | |
965 | ||
966 | memcpy(gid, &table->data_vec[index]->attr.gid, sizeof(*gid)); | |
967 | res = 0; | |
968 | ||
969 | done: | |
970 | read_unlock_irqrestore(&table->rwlock, flags); | |
971 | return res; | |
972 | } | |
973 | EXPORT_SYMBOL(rdma_query_gid); | |
974 | ||
779820c2 SX |
975 | /** |
976 | * rdma_read_gid_hw_context - Read the HW GID context from GID attribute | |
977 | * @attr: Potinter to the GID attribute | |
978 | * | |
979 | * rdma_read_gid_hw_context() reads the drivers GID HW context corresponding | |
980 | * to the SGID attr. Callers are required to already be holding the reference | |
981 | * to an existing GID entry. | |
982 | * | |
983 | * Returns the HW GID context | |
984 | * | |
985 | */ | |
986 | void *rdma_read_gid_hw_context(const struct ib_gid_attr *attr) | |
987 | { | |
988 | return container_of(attr, struct ib_gid_table_entry, attr)->context; | |
989 | } | |
990 | EXPORT_SYMBOL(rdma_read_gid_hw_context); | |
991 | ||
c3d71b69 JG |
992 | /** |
993 | * rdma_find_gid - Returns SGID attributes if the matching GID is found. | |
6612b498 PP |
994 | * @device: The device to query. |
995 | * @gid: The GID value to search for. | |
996 | * @gid_type: The GID type to search for. | |
997 | * @ndev: In RoCE, the net device of the device. NULL means ignore. | |
6612b498 | 998 | * |
c3d71b69 JG |
999 | * rdma_find_gid() searches for the specified GID value in the software cache. |
1000 | * | |
1001 | * Returns GID attributes if a valid GID is found or returns ERR_PTR for the | |
1002 | * error. The caller must invoke rdma_put_gid_attr() to release the reference. | |
1003 | * | |
6612b498 | 1004 | */ |
c3d71b69 JG |
1005 | const struct ib_gid_attr *rdma_find_gid(struct ib_device *device, |
1006 | const union ib_gid *gid, | |
1007 | enum ib_gid_type gid_type, | |
1008 | struct net_device *ndev) | |
03db3a2d | 1009 | { |
c3d71b69 JG |
1010 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
1011 | GID_ATTR_FIND_MASK_GID_TYPE; | |
1012 | struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type}; | |
8faea9fd | 1013 | unsigned int p; |
c3d71b69 JG |
1014 | |
1015 | if (ndev) | |
1016 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
1017 | ||
8faea9fd | 1018 | rdma_for_each_port(device, p) { |
c3d71b69 JG |
1019 | struct ib_gid_table *table; |
1020 | unsigned long flags; | |
1021 | int index; | |
1022 | ||
8faea9fd | 1023 | table = device->port_data[p].cache.gid; |
c3d71b69 JG |
1024 | read_lock_irqsave(&table->rwlock, flags); |
1025 | index = find_gid(table, gid, &gid_attr_val, false, mask, NULL); | |
1026 | if (index >= 0) { | |
1027 | const struct ib_gid_attr *attr; | |
1028 | ||
1029 | get_gid_entry(table->data_vec[index]); | |
1030 | attr = &table->data_vec[index]->attr; | |
1031 | read_unlock_irqrestore(&table->rwlock, flags); | |
1032 | return attr; | |
1033 | } | |
1034 | read_unlock_irqrestore(&table->rwlock, flags); | |
1035 | } | |
1036 | ||
1037 | return ERR_PTR(-ENOENT); | |
1038 | } | |
1039 | EXPORT_SYMBOL(rdma_find_gid); | |
1040 | ||
1da177e4 LT |
1041 | int ib_get_cached_pkey(struct ib_device *device, |
1042 | u8 port_num, | |
1043 | int index, | |
1044 | u16 *pkey) | |
1045 | { | |
1046 | struct ib_pkey_cache *cache; | |
1047 | unsigned long flags; | |
1048 | int ret = 0; | |
1049 | ||
24dc831b | 1050 | if (!rdma_is_port_valid(device, port_num)) |
1da177e4 LT |
1051 | return -EINVAL; |
1052 | ||
17e10646 | 1053 | read_lock_irqsave(&device->cache_lock, flags); |
1da177e4 | 1054 | |
8faea9fd | 1055 | cache = device->port_data[port_num].cache.pkey; |
1da177e4 LT |
1056 | |
1057 | if (index < 0 || index >= cache->table_len) | |
1058 | ret = -EINVAL; | |
1059 | else | |
1060 | *pkey = cache->table[index]; | |
1061 | ||
17e10646 | 1062 | read_unlock_irqrestore(&device->cache_lock, flags); |
1da177e4 LT |
1063 | |
1064 | return ret; | |
1065 | } | |
1066 | EXPORT_SYMBOL(ib_get_cached_pkey); | |
1067 | ||
883c71fe DJ |
1068 | int ib_get_cached_subnet_prefix(struct ib_device *device, |
1069 | u8 port_num, | |
1070 | u64 *sn_pfx) | |
1071 | { | |
1072 | unsigned long flags; | |
883c71fe | 1073 | |
6d5b2047 | 1074 | if (!rdma_is_port_valid(device, port_num)) |
883c71fe DJ |
1075 | return -EINVAL; |
1076 | ||
17e10646 | 1077 | read_lock_irqsave(&device->cache_lock, flags); |
8faea9fd | 1078 | *sn_pfx = device->port_data[port_num].cache.subnet_prefix; |
17e10646 | 1079 | read_unlock_irqrestore(&device->cache_lock, flags); |
883c71fe DJ |
1080 | |
1081 | return 0; | |
1082 | } | |
1083 | EXPORT_SYMBOL(ib_get_cached_subnet_prefix); | |
1084 | ||
1da177e4 LT |
1085 | int ib_find_cached_pkey(struct ib_device *device, |
1086 | u8 port_num, | |
1087 | u16 pkey, | |
1088 | u16 *index) | |
1089 | { | |
1090 | struct ib_pkey_cache *cache; | |
1091 | unsigned long flags; | |
1092 | int i; | |
1093 | int ret = -ENOENT; | |
ff7166c4 | 1094 | int partial_ix = -1; |
1da177e4 | 1095 | |
24dc831b | 1096 | if (!rdma_is_port_valid(device, port_num)) |
1da177e4 LT |
1097 | return -EINVAL; |
1098 | ||
17e10646 | 1099 | read_lock_irqsave(&device->cache_lock, flags); |
1da177e4 | 1100 | |
8faea9fd | 1101 | cache = device->port_data[port_num].cache.pkey; |
1da177e4 LT |
1102 | |
1103 | *index = -1; | |
1104 | ||
1105 | for (i = 0; i < cache->table_len; ++i) | |
1106 | if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) { | |
ff7166c4 JM |
1107 | if (cache->table[i] & 0x8000) { |
1108 | *index = i; | |
1109 | ret = 0; | |
1110 | break; | |
1111 | } else | |
1112 | partial_ix = i; | |
1da177e4 LT |
1113 | } |
1114 | ||
ff7166c4 JM |
1115 | if (ret && partial_ix >= 0) { |
1116 | *index = partial_ix; | |
1117 | ret = 0; | |
1118 | } | |
1119 | ||
17e10646 | 1120 | read_unlock_irqrestore(&device->cache_lock, flags); |
1da177e4 LT |
1121 | |
1122 | return ret; | |
1123 | } | |
1124 | EXPORT_SYMBOL(ib_find_cached_pkey); | |
1125 | ||
73aaa741 JM |
1126 | int ib_find_exact_cached_pkey(struct ib_device *device, |
1127 | u8 port_num, | |
1128 | u16 pkey, | |
1129 | u16 *index) | |
1130 | { | |
1131 | struct ib_pkey_cache *cache; | |
1132 | unsigned long flags; | |
1133 | int i; | |
1134 | int ret = -ENOENT; | |
1135 | ||
24dc831b | 1136 | if (!rdma_is_port_valid(device, port_num)) |
73aaa741 JM |
1137 | return -EINVAL; |
1138 | ||
17e10646 | 1139 | read_lock_irqsave(&device->cache_lock, flags); |
73aaa741 | 1140 | |
8faea9fd | 1141 | cache = device->port_data[port_num].cache.pkey; |
73aaa741 JM |
1142 | |
1143 | *index = -1; | |
1144 | ||
1145 | for (i = 0; i < cache->table_len; ++i) | |
1146 | if (cache->table[i] == pkey) { | |
1147 | *index = i; | |
1148 | ret = 0; | |
1149 | break; | |
1150 | } | |
1151 | ||
17e10646 | 1152 | read_unlock_irqrestore(&device->cache_lock, flags); |
73aaa741 JM |
1153 | |
1154 | return ret; | |
1155 | } | |
1156 | EXPORT_SYMBOL(ib_find_exact_cached_pkey); | |
1157 | ||
6fb9cdbf JM |
1158 | int ib_get_cached_lmc(struct ib_device *device, |
1159 | u8 port_num, | |
1160 | u8 *lmc) | |
1161 | { | |
1162 | unsigned long flags; | |
1163 | int ret = 0; | |
1164 | ||
24dc831b | 1165 | if (!rdma_is_port_valid(device, port_num)) |
6fb9cdbf JM |
1166 | return -EINVAL; |
1167 | ||
17e10646 | 1168 | read_lock_irqsave(&device->cache_lock, flags); |
8faea9fd | 1169 | *lmc = device->port_data[port_num].cache.lmc; |
17e10646 | 1170 | read_unlock_irqrestore(&device->cache_lock, flags); |
6fb9cdbf JM |
1171 | |
1172 | return ret; | |
1173 | } | |
1174 | EXPORT_SYMBOL(ib_get_cached_lmc); | |
1175 | ||
9e2c3f1c JW |
1176 | int ib_get_cached_port_state(struct ib_device *device, |
1177 | u8 port_num, | |
1178 | enum ib_port_state *port_state) | |
1179 | { | |
1180 | unsigned long flags; | |
1181 | int ret = 0; | |
1182 | ||
6d5b2047 | 1183 | if (!rdma_is_port_valid(device, port_num)) |
9e2c3f1c JW |
1184 | return -EINVAL; |
1185 | ||
17e10646 | 1186 | read_lock_irqsave(&device->cache_lock, flags); |
8faea9fd | 1187 | *port_state = device->port_data[port_num].cache.port_state; |
17e10646 | 1188 | read_unlock_irqrestore(&device->cache_lock, flags); |
9e2c3f1c JW |
1189 | |
1190 | return ret; | |
1191 | } | |
1192 | EXPORT_SYMBOL(ib_get_cached_port_state); | |
1193 | ||
bf399c2c PP |
1194 | /** |
1195 | * rdma_get_gid_attr - Returns GID attributes for a port of a device | |
1196 | * at a requested gid_index, if a valid GID entry exists. | |
1197 | * @device: The device to query. | |
1198 | * @port_num: The port number on the device where the GID value | |
1199 | * is to be queried. | |
1200 | * @index: Index of the GID table entry whose attributes are to | |
1201 | * be queried. | |
1202 | * | |
1203 | * rdma_get_gid_attr() acquires reference count of gid attributes from the | |
1204 | * cached GID table. Caller must invoke rdma_put_gid_attr() to release | |
1205 | * reference to gid attribute regardless of link layer. | |
1206 | * | |
1207 | * Returns pointer to valid gid attribute or ERR_PTR for the appropriate error | |
1208 | * code. | |
1209 | */ | |
1210 | const struct ib_gid_attr * | |
1211 | rdma_get_gid_attr(struct ib_device *device, u8 port_num, int index) | |
1212 | { | |
1213 | const struct ib_gid_attr *attr = ERR_PTR(-EINVAL); | |
1214 | struct ib_gid_table *table; | |
1215 | unsigned long flags; | |
1216 | ||
1217 | if (!rdma_is_port_valid(device, port_num)) | |
1218 | return ERR_PTR(-EINVAL); | |
1219 | ||
1220 | table = rdma_gid_table(device, port_num); | |
1221 | if (index < 0 || index >= table->sz) | |
1222 | return ERR_PTR(-EINVAL); | |
1223 | ||
1224 | read_lock_irqsave(&table->rwlock, flags); | |
1225 | if (!is_gid_entry_valid(table->data_vec[index])) | |
1226 | goto done; | |
1227 | ||
1228 | get_gid_entry(table->data_vec[index]); | |
1229 | attr = &table->data_vec[index]->attr; | |
1230 | done: | |
1231 | read_unlock_irqrestore(&table->rwlock, flags); | |
1232 | return attr; | |
1233 | } | |
1234 | EXPORT_SYMBOL(rdma_get_gid_attr); | |
1235 | ||
1236 | /** | |
1237 | * rdma_put_gid_attr - Release reference to the GID attribute | |
1238 | * @attr: Pointer to the GID attribute whose reference | |
1239 | * needs to be released. | |
1240 | * | |
1241 | * rdma_put_gid_attr() must be used to release reference whose | |
1242 | * reference is acquired using rdma_get_gid_attr() or any APIs | |
1243 | * which returns a pointer to the ib_gid_attr regardless of link layer | |
1244 | * of IB or RoCE. | |
1245 | * | |
1246 | */ | |
1247 | void rdma_put_gid_attr(const struct ib_gid_attr *attr) | |
1248 | { | |
1249 | struct ib_gid_table_entry *entry = | |
1250 | container_of(attr, struct ib_gid_table_entry, attr); | |
1251 | ||
1252 | put_gid_entry(entry); | |
1253 | } | |
1254 | EXPORT_SYMBOL(rdma_put_gid_attr); | |
1255 | ||
1256 | /** | |
1257 | * rdma_hold_gid_attr - Get reference to existing GID attribute | |
1258 | * | |
1259 | * @attr: Pointer to the GID attribute whose reference | |
1260 | * needs to be taken. | |
1261 | * | |
1262 | * Increase the reference count to a GID attribute to keep it from being | |
1263 | * freed. Callers are required to already be holding a reference to attribute. | |
1264 | * | |
1265 | */ | |
1266 | void rdma_hold_gid_attr(const struct ib_gid_attr *attr) | |
1267 | { | |
1268 | struct ib_gid_table_entry *entry = | |
1269 | container_of(attr, struct ib_gid_table_entry, attr); | |
1270 | ||
1271 | get_gid_entry(entry); | |
1272 | } | |
1273 | EXPORT_SYMBOL(rdma_hold_gid_attr); | |
1274 | ||
d6b1764a PP |
1275 | /** |
1276 | * rdma_read_gid_attr_ndev_rcu - Read GID attribute netdevice | |
1277 | * which must be in UP state. | |
1278 | * | |
1279 | * @attr:Pointer to the GID attribute | |
1280 | * | |
1281 | * Returns pointer to netdevice if the netdevice was attached to GID and | |
1282 | * netdevice is in UP state. Caller must hold RCU lock as this API | |
1283 | * reads the netdev flags which can change while netdevice migrates to | |
1284 | * different net namespace. Returns ERR_PTR with error code otherwise. | |
1285 | * | |
1286 | */ | |
1287 | struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr) | |
1288 | { | |
1289 | struct ib_gid_table_entry *entry = | |
1290 | container_of(attr, struct ib_gid_table_entry, attr); | |
1291 | struct ib_device *device = entry->attr.device; | |
1292 | struct net_device *ndev = ERR_PTR(-ENODEV); | |
1293 | u8 port_num = entry->attr.port_num; | |
1294 | struct ib_gid_table *table; | |
1295 | unsigned long flags; | |
1296 | bool valid; | |
1297 | ||
1298 | table = rdma_gid_table(device, port_num); | |
1299 | ||
1300 | read_lock_irqsave(&table->rwlock, flags); | |
1301 | valid = is_gid_entry_valid(table->data_vec[attr->index]); | |
943bd984 PP |
1302 | if (valid) { |
1303 | ndev = rcu_dereference(attr->ndev); | |
1304 | if (!ndev || | |
1305 | (ndev && ((READ_ONCE(ndev->flags) & IFF_UP) == 0))) | |
1306 | ndev = ERR_PTR(-ENODEV); | |
1307 | } | |
d6b1764a PP |
1308 | read_unlock_irqrestore(&table->rwlock, flags); |
1309 | return ndev; | |
1310 | } | |
adb4a57a | 1311 | EXPORT_SYMBOL(rdma_read_gid_attr_ndev_rcu); |
d6b1764a | 1312 | |
a70c0739 PP |
1313 | static int get_lower_dev_vlan(struct net_device *lower_dev, void *data) |
1314 | { | |
1315 | u16 *vlan_id = data; | |
1316 | ||
1317 | if (is_vlan_dev(lower_dev)) | |
1318 | *vlan_id = vlan_dev_vlan_id(lower_dev); | |
1319 | ||
1320 | /* We are interested only in first level vlan device, so | |
1321 | * always return 1 to stop iterating over next level devices. | |
1322 | */ | |
1323 | return 1; | |
1324 | } | |
1325 | ||
1326 | /** | |
1327 | * rdma_read_gid_l2_fields - Read the vlan ID and source MAC address | |
1328 | * of a GID entry. | |
1329 | * | |
1330 | * @attr: GID attribute pointer whose L2 fields to be read | |
1331 | * @vlan_id: Pointer to vlan id to fill up if the GID entry has | |
1332 | * vlan id. It is optional. | |
1333 | * @smac: Pointer to smac to fill up for a GID entry. It is optional. | |
1334 | * | |
1335 | * rdma_read_gid_l2_fields() returns 0 on success and returns vlan id | |
1336 | * (if gid entry has vlan) and source MAC, or returns error. | |
1337 | */ | |
1338 | int rdma_read_gid_l2_fields(const struct ib_gid_attr *attr, | |
1339 | u16 *vlan_id, u8 *smac) | |
1340 | { | |
1341 | struct net_device *ndev; | |
1342 | ||
943bd984 PP |
1343 | rcu_read_lock(); |
1344 | ndev = rcu_dereference(attr->ndev); | |
1345 | if (!ndev) { | |
1346 | rcu_read_unlock(); | |
1347 | return -ENODEV; | |
1348 | } | |
a70c0739 PP |
1349 | if (smac) |
1350 | ether_addr_copy(smac, ndev->dev_addr); | |
1351 | if (vlan_id) { | |
1352 | *vlan_id = 0xffff; | |
1353 | if (is_vlan_dev(ndev)) { | |
1354 | *vlan_id = vlan_dev_vlan_id(ndev); | |
1355 | } else { | |
1356 | /* If the netdev is upper device and if it's lower | |
1357 | * device is vlan device, consider vlan id of the | |
1358 | * the lower vlan device for this gid entry. | |
1359 | */ | |
a70c0739 PP |
1360 | netdev_walk_all_lower_dev_rcu(attr->ndev, |
1361 | get_lower_dev_vlan, vlan_id); | |
a70c0739 PP |
1362 | } |
1363 | } | |
943bd984 | 1364 | rcu_read_unlock(); |
a70c0739 PP |
1365 | return 0; |
1366 | } | |
1367 | EXPORT_SYMBOL(rdma_read_gid_l2_fields); | |
1368 | ||
598ff6ba PP |
1369 | static int config_non_roce_gid_cache(struct ib_device *device, |
1370 | u8 port, int gid_tbl_len) | |
1371 | { | |
1372 | struct ib_gid_attr gid_attr = {}; | |
1373 | struct ib_gid_table *table; | |
598ff6ba PP |
1374 | int ret = 0; |
1375 | int i; | |
1376 | ||
1377 | gid_attr.device = device; | |
1378 | gid_attr.port_num = port; | |
724631a9 | 1379 | table = rdma_gid_table(device, port); |
598ff6ba PP |
1380 | |
1381 | mutex_lock(&table->lock); | |
1382 | for (i = 0; i < gid_tbl_len; ++i) { | |
3023a1e9 | 1383 | if (!device->ops.query_gid) |
598ff6ba | 1384 | continue; |
3023a1e9 | 1385 | ret = device->ops.query_gid(device, port, i, &gid_attr.gid); |
598ff6ba | 1386 | if (ret) { |
43c7c851 JG |
1387 | dev_warn(&device->dev, |
1388 | "query_gid failed (%d) for index %d\n", ret, | |
1389 | i); | |
598ff6ba PP |
1390 | goto err; |
1391 | } | |
1392 | gid_attr.index = i; | |
b150c386 | 1393 | add_modify_gid(table, &gid_attr); |
598ff6ba PP |
1394 | } |
1395 | err: | |
1396 | mutex_unlock(&table->lock); | |
1397 | return ret; | |
1398 | } | |
1399 | ||
6b57cea9 PP |
1400 | static int |
1401 | ib_cache_update(struct ib_device *device, u8 port, bool enforce_security) | |
1da177e4 LT |
1402 | { |
1403 | struct ib_port_attr *tprops = NULL; | |
1404 | struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache; | |
1da177e4 LT |
1405 | int i; |
1406 | int ret; | |
03db3a2d | 1407 | |
24dc831b | 1408 | if (!rdma_is_port_valid(device, port)) |
6b57cea9 | 1409 | return -EINVAL; |
03db3a2d | 1410 | |
1da177e4 LT |
1411 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); |
1412 | if (!tprops) | |
6b57cea9 | 1413 | return -ENOMEM; |
1da177e4 LT |
1414 | |
1415 | ret = ib_query_port(device, port, tprops); | |
1416 | if (ret) { | |
43c7c851 | 1417 | dev_warn(&device->dev, "ib_query_port failed (%d)\n", ret); |
1da177e4 LT |
1418 | goto err; |
1419 | } | |
1420 | ||
598ff6ba PP |
1421 | if (!rdma_protocol_roce(device, port)) { |
1422 | ret = config_non_roce_gid_cache(device, port, | |
1423 | tprops->gid_tbl_len); | |
1424 | if (ret) | |
1425 | goto err; | |
1426 | } | |
1427 | ||
acafe7e3 KC |
1428 | pkey_cache = kmalloc(struct_size(pkey_cache, table, |
1429 | tprops->pkey_tbl_len), | |
1430 | GFP_KERNEL); | |
6b57cea9 PP |
1431 | if (!pkey_cache) { |
1432 | ret = -ENOMEM; | |
1da177e4 | 1433 | goto err; |
6b57cea9 | 1434 | } |
1da177e4 LT |
1435 | |
1436 | pkey_cache->table_len = tprops->pkey_tbl_len; | |
1437 | ||
1da177e4 LT |
1438 | for (i = 0; i < pkey_cache->table_len; ++i) { |
1439 | ret = ib_query_pkey(device, port, i, pkey_cache->table + i); | |
1440 | if (ret) { | |
43c7c851 JG |
1441 | dev_warn(&device->dev, |
1442 | "ib_query_pkey failed (%d) for index %d\n", | |
1443 | ret, i); | |
1da177e4 LT |
1444 | goto err; |
1445 | } | |
1446 | } | |
1447 | ||
17e10646 | 1448 | write_lock_irq(&device->cache_lock); |
1da177e4 | 1449 | |
8faea9fd | 1450 | old_pkey_cache = device->port_data[port].cache.pkey; |
1da177e4 | 1451 | |
8faea9fd JG |
1452 | device->port_data[port].cache.pkey = pkey_cache; |
1453 | device->port_data[port].cache.lmc = tprops->lmc; | |
1454 | device->port_data[port].cache.port_state = tprops->state; | |
6fb9cdbf | 1455 | |
8faea9fd | 1456 | device->port_data[port].cache.subnet_prefix = tprops->subnet_prefix; |
17e10646 | 1457 | write_unlock_irq(&device->cache_lock); |
1da177e4 | 1458 | |
d291f1a6 DJ |
1459 | if (enforce_security) |
1460 | ib_security_cache_change(device, | |
1461 | port, | |
1462 | tprops->subnet_prefix); | |
1463 | ||
1da177e4 | 1464 | kfree(old_pkey_cache); |
1da177e4 | 1465 | kfree(tprops); |
6b57cea9 | 1466 | return 0; |
1da177e4 LT |
1467 | |
1468 | err: | |
1469 | kfree(pkey_cache); | |
1da177e4 | 1470 | kfree(tprops); |
6b57cea9 PP |
1471 | return ret; |
1472 | } | |
1473 | ||
1474 | static void ib_cache_event_task(struct work_struct *_work) | |
1475 | { | |
1476 | struct ib_update_work *work = | |
1477 | container_of(_work, struct ib_update_work, work); | |
1478 | int ret; | |
1479 | ||
1480 | /* Before distributing the cache update event, first sync | |
1481 | * the cache. | |
1482 | */ | |
1483 | ret = ib_cache_update(work->event.device, work->event.element.port_num, | |
1484 | work->enforce_security); | |
1485 | ||
1486 | /* GID event is notified already for individual GID entries by | |
1487 | * dispatch_gid_change_event(). Hence, notifiy for rest of the | |
1488 | * events. | |
1489 | */ | |
1490 | if (!ret && work->event.event != IB_EVENT_GID_CHANGE) | |
1491 | ib_dispatch_event_clients(&work->event); | |
1492 | ||
1493 | kfree(work); | |
1da177e4 LT |
1494 | } |
1495 | ||
6b57cea9 | 1496 | static void ib_generic_event_task(struct work_struct *_work) |
1da177e4 | 1497 | { |
c4028958 DH |
1498 | struct ib_update_work *work = |
1499 | container_of(_work, struct ib_update_work, work); | |
1da177e4 | 1500 | |
6b57cea9 | 1501 | ib_dispatch_event_clients(&work->event); |
1da177e4 LT |
1502 | kfree(work); |
1503 | } | |
1504 | ||
6b57cea9 PP |
1505 | static bool is_cache_update_event(const struct ib_event *event) |
1506 | { | |
1507 | return (event->event == IB_EVENT_PORT_ERR || | |
1508 | event->event == IB_EVENT_PORT_ACTIVE || | |
1509 | event->event == IB_EVENT_LID_CHANGE || | |
1510 | event->event == IB_EVENT_PKEY_CHANGE || | |
1511 | event->event == IB_EVENT_CLIENT_REREGISTER || | |
1512 | event->event == IB_EVENT_GID_CHANGE); | |
1513 | } | |
1514 | ||
1515 | /** | |
1516 | * ib_dispatch_event - Dispatch an asynchronous event | |
1517 | * @event:Event to dispatch | |
1518 | * | |
1519 | * Low-level drivers must call ib_dispatch_event() to dispatch the | |
1520 | * event to all registered event handlers when an asynchronous event | |
1521 | * occurs. | |
1522 | */ | |
1523 | void ib_dispatch_event(const struct ib_event *event) | |
1da177e4 LT |
1524 | { |
1525 | struct ib_update_work *work; | |
1526 | ||
6b57cea9 PP |
1527 | work = kzalloc(sizeof(*work), GFP_ATOMIC); |
1528 | if (!work) | |
1529 | return; | |
1530 | ||
1531 | if (is_cache_update_event(event)) | |
1532 | INIT_WORK(&work->work, ib_cache_event_task); | |
1533 | else | |
1534 | INIT_WORK(&work->work, ib_generic_event_task); | |
1535 | ||
1536 | work->event = *event; | |
1537 | if (event->event == IB_EVENT_PKEY_CHANGE || | |
1538 | event->event == IB_EVENT_GID_CHANGE) | |
1539 | work->enforce_security = true; | |
1540 | ||
1541 | queue_work(ib_wq, &work->work); | |
1da177e4 | 1542 | } |
6b57cea9 | 1543 | EXPORT_SYMBOL(ib_dispatch_event); |
1da177e4 | 1544 | |
03db3a2d | 1545 | int ib_cache_setup_one(struct ib_device *device) |
1da177e4 | 1546 | { |
ea1075ed | 1547 | unsigned int p; |
03db3a2d | 1548 | int err; |
1da177e4 | 1549 | |
17e10646 | 1550 | rwlock_init(&device->cache_lock); |
1da177e4 | 1551 | |
03db3a2d | 1552 | err = gid_table_setup_one(device); |
8faea9fd | 1553 | if (err) |
dcc9881e | 1554 | return err; |
03db3a2d | 1555 | |
1901b91f JM |
1556 | rdma_for_each_port (device, p) { |
1557 | err = ib_cache_update(device, p, true); | |
1558 | if (err) | |
1559 | return err; | |
1560 | } | |
1da177e4 | 1561 | |
03db3a2d | 1562 | return 0; |
1da177e4 LT |
1563 | } |
1564 | ||
03db3a2d | 1565 | void ib_cache_release_one(struct ib_device *device) |
1da177e4 | 1566 | { |
8faea9fd | 1567 | unsigned int p; |
d45f89d5 | 1568 | |
03db3a2d MB |
1569 | /* |
1570 | * The release function frees all the cache elements. | |
1571 | * This function should be called as part of freeing | |
1572 | * all the device's resources when the cache could no | |
1573 | * longer be accessed. | |
1574 | */ | |
8faea9fd JG |
1575 | rdma_for_each_port (device, p) |
1576 | kfree(device->port_data[p].cache.pkey); | |
03db3a2d MB |
1577 | |
1578 | gid_table_release_one(device); | |
1da177e4 LT |
1579 | } |
1580 | ||
03db3a2d MB |
1581 | void ib_cache_cleanup_one(struct ib_device *device) |
1582 | { | |
6b57cea9 PP |
1583 | /* The cleanup function waits for all in-progress workqueue |
1584 | * elements and cleans up the GID cache. This function should be | |
1585 | * called after the device was removed from the devices list and | |
1586 | * all clients were removed, so the cache exists but is | |
03db3a2d MB |
1587 | * non-functional and shouldn't be updated anymore. |
1588 | */ | |
03db3a2d MB |
1589 | flush_workqueue(ib_wq); |
1590 | gid_table_cleanup_one(device); | |
b150c386 PP |
1591 | |
1592 | /* | |
1593 | * Flush the wq second time for any pending GID delete work. | |
1594 | */ | |
1595 | flush_workqueue(ib_wq); | |
03db3a2d | 1596 | } |