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 | ||
03db3a2d | 81 | struct ib_gid_table_entry { |
b150c386 PP |
82 | struct kref kref; |
83 | struct work_struct del_work; | |
84 | struct ib_gid_attr attr; | |
85 | void *context; | |
86 | enum gid_table_entry_state state; | |
03db3a2d MB |
87 | }; |
88 | ||
89 | struct ib_gid_table { | |
1c36cf91 | 90 | int sz; |
03db3a2d MB |
91 | /* In RoCE, adding a GID to the table requires: |
92 | * (a) Find if this GID is already exists. | |
93 | * (b) Find a free space. | |
94 | * (c) Write the new GID | |
95 | * | |
96 | * Delete requires different set of operations: | |
97 | * (a) Find the GID | |
98 | * (b) Delete it. | |
99 | * | |
03db3a2d | 100 | **/ |
598ff6ba | 101 | /* Any writer to data_vec must hold this lock and the write side of |
b150c386 | 102 | * rwlock. Readers must hold only rwlock. All writers must be in a |
598ff6ba | 103 | * sleepable context. |
9c584f04 | 104 | */ |
1c36cf91 | 105 | struct mutex lock; |
b150c386 PP |
106 | /* rwlock protects data_vec[ix]->state and entry pointer. |
107 | */ | |
1c36cf91 | 108 | rwlock_t rwlock; |
b150c386 | 109 | struct ib_gid_table_entry **data_vec; |
1c36cf91 PP |
110 | /* bit field, each bit indicates the index of default GID */ |
111 | u32 default_gid_indices; | |
03db3a2d MB |
112 | }; |
113 | ||
f3906bd3 MB |
114 | static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port) |
115 | { | |
3401857e | 116 | struct ib_event event; |
f3906bd3 | 117 | |
3401857e PP |
118 | event.device = ib_dev; |
119 | event.element.port_num = port; | |
120 | event.event = IB_EVENT_GID_CHANGE; | |
f3906bd3 | 121 | |
3401857e | 122 | ib_dispatch_event(&event); |
f3906bd3 MB |
123 | } |
124 | ||
b39ffa1d MB |
125 | static const char * const gid_type_str[] = { |
126 | [IB_GID_TYPE_IB] = "IB/RoCE v1", | |
7766a99f | 127 | [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2", |
b39ffa1d MB |
128 | }; |
129 | ||
130 | const char *ib_cache_gid_type_str(enum ib_gid_type gid_type) | |
131 | { | |
132 | if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type]) | |
133 | return gid_type_str[gid_type]; | |
134 | ||
135 | return "Invalid GID type"; | |
136 | } | |
137 | EXPORT_SYMBOL(ib_cache_gid_type_str); | |
138 | ||
25e62655 PP |
139 | /** rdma_is_zero_gid - Check if given GID is zero or not. |
140 | * @gid: GID to check | |
141 | * Returns true if given GID is zero, returns false otherwise. | |
142 | */ | |
143 | bool rdma_is_zero_gid(const union ib_gid *gid) | |
144 | { | |
145 | return !memcmp(gid, &zgid, sizeof(*gid)); | |
146 | } | |
147 | EXPORT_SYMBOL(rdma_is_zero_gid); | |
148 | ||
1c36cf91 PP |
149 | /** is_gid_index_default - Check if a given index belongs to |
150 | * reserved default GIDs or not. | |
151 | * @table: GID table pointer | |
152 | * @index: Index to check in GID table | |
153 | * Returns true if index is one of the reserved default GID index otherwise | |
154 | * returns false. | |
155 | */ | |
156 | static bool is_gid_index_default(const struct ib_gid_table *table, | |
157 | unsigned int index) | |
158 | { | |
159 | return index < 32 && (BIT(index) & table->default_gid_indices); | |
160 | } | |
161 | ||
045959db MB |
162 | int ib_cache_gid_parse_type_str(const char *buf) |
163 | { | |
164 | unsigned int i; | |
165 | size_t len; | |
166 | int err = -EINVAL; | |
167 | ||
168 | len = strlen(buf); | |
169 | if (len == 0) | |
170 | return -EINVAL; | |
171 | ||
172 | if (buf[len - 1] == '\n') | |
173 | len--; | |
174 | ||
175 | for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i) | |
176 | if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) && | |
177 | len == strlen(gid_type_str[i])) { | |
178 | err = i; | |
179 | break; | |
180 | } | |
181 | ||
182 | return err; | |
183 | } | |
184 | EXPORT_SYMBOL(ib_cache_gid_parse_type_str); | |
185 | ||
724631a9 PP |
186 | static struct ib_gid_table *rdma_gid_table(struct ib_device *device, u8 port) |
187 | { | |
188 | return device->cache.ports[port - rdma_start_port(device)].gid; | |
189 | } | |
190 | ||
b150c386 PP |
191 | static bool is_gid_entry_free(const struct ib_gid_table_entry *entry) |
192 | { | |
193 | return !entry; | |
194 | } | |
195 | ||
196 | static bool is_gid_entry_valid(const struct ib_gid_table_entry *entry) | |
197 | { | |
198 | return entry && entry->state == GID_TABLE_ENTRY_VALID; | |
199 | } | |
200 | ||
201 | static void schedule_free_gid(struct kref *kref) | |
202 | { | |
203 | struct ib_gid_table_entry *entry = | |
204 | container_of(kref, struct ib_gid_table_entry, kref); | |
205 | ||
206 | queue_work(ib_wq, &entry->del_work); | |
207 | } | |
208 | ||
209 | static void free_gid_entry(struct ib_gid_table_entry *entry) | |
1da177e4 | 210 | { |
b150c386 PP |
211 | struct ib_device *device = entry->attr.device; |
212 | u8 port_num = entry->attr.port_num; | |
213 | struct ib_gid_table *table = rdma_gid_table(device, port_num); | |
214 | ||
598ff6ba | 215 | pr_debug("%s device=%s port=%d index=%d gid %pI6\n", __func__, |
b150c386 PP |
216 | device->name, port_num, entry->attr.index, |
217 | entry->attr.gid.raw); | |
218 | ||
219 | mutex_lock(&table->lock); | |
220 | if (rdma_cap_roce_gid_table(device, port_num) && | |
221 | entry->state != GID_TABLE_ENTRY_INVALID) | |
222 | device->del_gid(&entry->attr, &entry->context); | |
223 | write_lock_irq(&table->rwlock); | |
598ff6ba | 224 | |
b150c386 PP |
225 | /* |
226 | * The only way to avoid overwriting NULL in table is | |
227 | * by comparing if it is same entry in table or not! | |
228 | * If new entry in table is added by the time we free here, | |
229 | * don't overwrite the table entry. | |
230 | */ | |
231 | if (entry == table->data_vec[entry->attr.index]) | |
232 | table->data_vec[entry->attr.index] = NULL; | |
233 | /* Now this index is ready to be allocated */ | |
234 | write_unlock_irq(&table->rwlock); | |
235 | mutex_unlock(&table->lock); | |
236 | ||
237 | if (entry->attr.ndev) | |
238 | dev_put(entry->attr.ndev); | |
239 | kfree(entry); | |
240 | } | |
241 | ||
242 | /** | |
243 | * free_gid_work - Release reference to the GID entry | |
244 | * @work: Work structure to refer to GID entry which needs to be | |
245 | * deleted. | |
246 | * | |
247 | * free_gid_work() frees the entry from the HCA's hardware table | |
248 | * if provider supports it. It releases reference to netdevice. | |
249 | */ | |
250 | static void free_gid_work(struct work_struct *work) | |
251 | { | |
252 | struct ib_gid_table_entry *entry = | |
253 | container_of(work, struct ib_gid_table_entry, del_work); | |
254 | free_gid_entry(entry); | |
598ff6ba | 255 | } |
03db3a2d | 256 | |
b150c386 PP |
257 | static struct ib_gid_table_entry * |
258 | alloc_gid_entry(const struct ib_gid_attr *attr) | |
598ff6ba PP |
259 | { |
260 | struct ib_gid_table_entry *entry; | |
b150c386 PP |
261 | |
262 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); | |
263 | if (!entry) | |
264 | return NULL; | |
265 | kref_init(&entry->kref); | |
266 | memcpy(&entry->attr, attr, sizeof(*attr)); | |
267 | if (entry->attr.ndev) | |
268 | dev_hold(entry->attr.ndev); | |
269 | INIT_WORK(&entry->del_work, free_gid_work); | |
270 | entry->state = GID_TABLE_ENTRY_INVALID; | |
271 | return entry; | |
272 | } | |
273 | ||
274 | static void store_gid_entry(struct ib_gid_table *table, | |
275 | struct ib_gid_table_entry *entry) | |
276 | { | |
277 | entry->state = GID_TABLE_ENTRY_VALID; | |
278 | ||
279 | pr_debug("%s device=%s port=%d index=%d gid %pI6\n", __func__, | |
280 | entry->attr.device->name, entry->attr.port_num, | |
281 | entry->attr.index, entry->attr.gid.raw); | |
282 | ||
283 | lockdep_assert_held(&table->lock); | |
284 | write_lock_irq(&table->rwlock); | |
285 | table->data_vec[entry->attr.index] = entry; | |
286 | write_unlock_irq(&table->rwlock); | |
287 | } | |
288 | ||
bf399c2c PP |
289 | static void get_gid_entry(struct ib_gid_table_entry *entry) |
290 | { | |
291 | kref_get(&entry->kref); | |
292 | } | |
293 | ||
b150c386 PP |
294 | static void put_gid_entry(struct ib_gid_table_entry *entry) |
295 | { | |
296 | kref_put(&entry->kref, schedule_free_gid); | |
297 | } | |
298 | ||
299 | static int add_roce_gid(struct ib_gid_table_entry *entry) | |
300 | { | |
301 | const struct ib_gid_attr *attr = &entry->attr; | |
302 | int ret; | |
03db3a2d | 303 | |
598ff6ba PP |
304 | if (!attr->ndev) { |
305 | pr_err("%s NULL netdev device=%s port=%d index=%d\n", | |
306 | __func__, attr->device->name, attr->port_num, | |
307 | attr->index); | |
308 | return -EINVAL; | |
03db3a2d | 309 | } |
598ff6ba | 310 | if (rdma_cap_roce_gid_table(attr->device, attr->port_num)) { |
f4df9a7c | 311 | ret = attr->device->add_gid(attr, &entry->context); |
598ff6ba PP |
312 | if (ret) { |
313 | pr_err("%s GID add failed device=%s port=%d index=%d\n", | |
314 | __func__, attr->device->name, attr->port_num, | |
315 | attr->index); | |
b150c386 | 316 | return ret; |
598ff6ba | 317 | } |
8e787646 | 318 | } |
b150c386 | 319 | return 0; |
03db3a2d MB |
320 | } |
321 | ||
598ff6ba PP |
322 | /** |
323 | * add_modify_gid - Add or modify GID table entry | |
324 | * | |
325 | * @table: GID table in which GID to be added or modified | |
598ff6ba PP |
326 | * @attr: Attributes of the GID |
327 | * | |
328 | * Returns 0 on success or appropriate error code. It accepts zero | |
329 | * GID addition for non RoCE ports for HCA's who report them as valid | |
330 | * GID. However such zero GIDs are not added to the cache. | |
331 | */ | |
332 | static int add_modify_gid(struct ib_gid_table *table, | |
598ff6ba PP |
333 | const struct ib_gid_attr *attr) |
334 | { | |
b150c386 PP |
335 | struct ib_gid_table_entry *entry; |
336 | int ret = 0; | |
337 | ||
338 | /* | |
339 | * Invalidate any old entry in the table to make it safe to write to | |
340 | * this index. | |
341 | */ | |
342 | if (is_gid_entry_valid(table->data_vec[attr->index])) | |
343 | put_gid_entry(table->data_vec[attr->index]); | |
344 | ||
345 | /* | |
346 | * Some HCA's report multiple GID entries with only one valid GID, and | |
347 | * leave other unused entries as the zero GID. Convert zero GIDs to | |
348 | * empty table entries instead of storing them. | |
349 | */ | |
350 | if (rdma_is_zero_gid(&attr->gid)) | |
351 | return 0; | |
352 | ||
353 | entry = alloc_gid_entry(attr); | |
354 | if (!entry) | |
355 | return -ENOMEM; | |
598ff6ba PP |
356 | |
357 | if (rdma_protocol_roce(attr->device, attr->port_num)) { | |
b150c386 | 358 | ret = add_roce_gid(entry); |
598ff6ba | 359 | if (ret) |
b150c386 | 360 | goto done; |
598ff6ba PP |
361 | } |
362 | ||
b150c386 | 363 | store_gid_entry(table, entry); |
598ff6ba | 364 | return 0; |
b150c386 PP |
365 | |
366 | done: | |
367 | put_gid_entry(entry); | |
368 | return ret; | |
03db3a2d MB |
369 | } |
370 | ||
598ff6ba PP |
371 | /** |
372 | * del_gid - Delete GID table entry | |
373 | * | |
374 | * @ib_dev: IB device whose GID entry to be deleted | |
375 | * @port: Port number of the IB device | |
376 | * @table: GID table of the IB device for a port | |
377 | * @ix: GID entry index to delete | |
378 | * | |
379 | */ | |
380 | static void del_gid(struct ib_device *ib_dev, u8 port, | |
381 | struct ib_gid_table *table, int ix) | |
382 | { | |
b150c386 PP |
383 | struct ib_gid_table_entry *entry; |
384 | ||
598ff6ba | 385 | lockdep_assert_held(&table->lock); |
b150c386 PP |
386 | |
387 | pr_debug("%s device=%s port=%d index=%d gid %pI6\n", __func__, | |
388 | ib_dev->name, port, ix, | |
389 | table->data_vec[ix]->attr.gid.raw); | |
390 | ||
598ff6ba | 391 | write_lock_irq(&table->rwlock); |
b150c386 PP |
392 | entry = table->data_vec[ix]; |
393 | entry->state = GID_TABLE_ENTRY_PENDING_DEL; | |
394 | /* | |
395 | * For non RoCE protocol, GID entry slot is ready to use. | |
396 | */ | |
397 | if (!rdma_protocol_roce(ib_dev, port)) | |
398 | table->data_vec[ix] = NULL; | |
598ff6ba PP |
399 | write_unlock_irq(&table->rwlock); |
400 | ||
b150c386 | 401 | put_gid_entry(entry); |
03db3a2d MB |
402 | } |
403 | ||
598ff6ba | 404 | /* rwlock should be read locked, or lock should be held */ |
03db3a2d MB |
405 | static int find_gid(struct ib_gid_table *table, const union ib_gid *gid, |
406 | const struct ib_gid_attr *val, bool default_gid, | |
cee3c4d0 | 407 | unsigned long mask, int *pempty) |
03db3a2d | 408 | { |
cee3c4d0 MB |
409 | int i = 0; |
410 | int found = -1; | |
411 | int empty = pempty ? -1 : 0; | |
03db3a2d | 412 | |
cee3c4d0 | 413 | while (i < table->sz && (found < 0 || empty < 0)) { |
b150c386 PP |
414 | struct ib_gid_table_entry *data = table->data_vec[i]; |
415 | struct ib_gid_attr *attr; | |
cee3c4d0 | 416 | int curr_index = i; |
03db3a2d | 417 | |
cee3c4d0 | 418 | i++; |
03db3a2d | 419 | |
598ff6ba PP |
420 | /* find_gid() is used during GID addition where it is expected |
421 | * to return a free entry slot which is not duplicate. | |
422 | * Free entry slot is requested and returned if pempty is set, | |
423 | * so lookup free slot only if requested. | |
424 | */ | |
425 | if (pempty && empty < 0) { | |
b150c386 PP |
426 | if (is_gid_entry_free(data) && |
427 | default_gid == | |
428 | is_gid_index_default(table, curr_index)) { | |
a66ed149 PP |
429 | /* |
430 | * Found an invalid (free) entry; allocate it. | |
431 | * If default GID is requested, then our | |
432 | * found slot must be one of the DEFAULT | |
433 | * reserved slots or we fail. | |
434 | * This ensures that only DEFAULT reserved | |
435 | * slots are used for default property GIDs. | |
436 | */ | |
437 | empty = curr_index; | |
598ff6ba PP |
438 | } |
439 | } | |
440 | ||
441 | /* | |
442 | * Additionally find_gid() is used to find valid entry during | |
b150c386 PP |
443 | * lookup operation; so ignore the entries which are marked as |
444 | * pending for removal and the entries which are marked as | |
445 | * invalid. | |
598ff6ba | 446 | */ |
b150c386 | 447 | if (!is_gid_entry_valid(data)) |
cee3c4d0 MB |
448 | continue; |
449 | ||
cee3c4d0 | 450 | if (found >= 0) |
9c584f04 | 451 | continue; |
03db3a2d | 452 | |
b150c386 | 453 | attr = &data->attr; |
b39ffa1d MB |
454 | if (mask & GID_ATTR_FIND_MASK_GID_TYPE && |
455 | attr->gid_type != val->gid_type) | |
456 | continue; | |
457 | ||
03db3a2d | 458 | if (mask & GID_ATTR_FIND_MASK_GID && |
b150c386 | 459 | memcmp(gid, &data->attr.gid, sizeof(*gid))) |
9c584f04 | 460 | continue; |
03db3a2d MB |
461 | |
462 | if (mask & GID_ATTR_FIND_MASK_NETDEV && | |
463 | attr->ndev != val->ndev) | |
9c584f04 | 464 | continue; |
03db3a2d MB |
465 | |
466 | if (mask & GID_ATTR_FIND_MASK_DEFAULT && | |
1c36cf91 | 467 | is_gid_index_default(table, curr_index) != default_gid) |
9c584f04 | 468 | continue; |
03db3a2d | 469 | |
cee3c4d0 | 470 | found = curr_index; |
03db3a2d MB |
471 | } |
472 | ||
cee3c4d0 MB |
473 | if (pempty) |
474 | *pempty = empty; | |
475 | ||
476 | return found; | |
03db3a2d MB |
477 | } |
478 | ||
479 | static void make_default_gid(struct net_device *dev, union ib_gid *gid) | |
480 | { | |
481 | gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); | |
482 | addrconf_ifid_eui48(&gid->raw[8], dev); | |
483 | } | |
484 | ||
598ff6ba PP |
485 | static int __ib_cache_gid_add(struct ib_device *ib_dev, u8 port, |
486 | union ib_gid *gid, struct ib_gid_attr *attr, | |
487 | unsigned long mask, bool default_gid) | |
03db3a2d | 488 | { |
03db3a2d | 489 | struct ib_gid_table *table; |
1da177e4 | 490 | int ret = 0; |
cee3c4d0 | 491 | int empty; |
598ff6ba | 492 | int ix; |
1da177e4 | 493 | |
598ff6ba PP |
494 | /* Do not allow adding zero GID in support of |
495 | * IB spec version 1.3 section 4.1.1 point (6) and | |
496 | * section 12.7.10 and section 12.7.20 | |
497 | */ | |
25e62655 | 498 | if (rdma_is_zero_gid(gid)) |
1da177e4 LT |
499 | return -EINVAL; |
500 | ||
724631a9 | 501 | table = rdma_gid_table(ib_dev, port); |
598ff6ba PP |
502 | |
503 | mutex_lock(&table->lock); | |
504 | ||
505 | ix = find_gid(table, gid, attr, default_gid, mask, &empty); | |
506 | if (ix >= 0) | |
507 | goto out_unlock; | |
508 | ||
509 | if (empty < 0) { | |
510 | ret = -ENOSPC; | |
511 | goto out_unlock; | |
512 | } | |
513 | attr->device = ib_dev; | |
514 | attr->index = empty; | |
515 | attr->port_num = port; | |
b150c386 PP |
516 | attr->gid = *gid; |
517 | ret = add_modify_gid(table, attr); | |
598ff6ba PP |
518 | if (!ret) |
519 | dispatch_gid_change_event(ib_dev, port); | |
520 | ||
521 | out_unlock: | |
522 | mutex_unlock(&table->lock); | |
523 | if (ret) | |
524 | pr_warn("%s: unable to add gid %pI6 error=%d\n", | |
525 | __func__, gid->raw, ret); | |
526 | return ret; | |
527 | } | |
528 | ||
529 | int ib_cache_gid_add(struct ib_device *ib_dev, u8 port, | |
530 | union ib_gid *gid, struct ib_gid_attr *attr) | |
531 | { | |
532 | struct net_device *idev; | |
533 | unsigned long mask; | |
534 | int ret; | |
535 | ||
03db3a2d MB |
536 | if (ib_dev->get_netdev) { |
537 | idev = ib_dev->get_netdev(ib_dev, port); | |
538 | if (idev && attr->ndev != idev) { | |
539 | union ib_gid default_gid; | |
1da177e4 | 540 | |
03db3a2d MB |
541 | /* Adding default GIDs in not permitted */ |
542 | make_default_gid(idev, &default_gid); | |
543 | if (!memcmp(gid, &default_gid, sizeof(*gid))) { | |
544 | dev_put(idev); | |
545 | return -EPERM; | |
546 | } | |
547 | } | |
548 | if (idev) | |
549 | dev_put(idev); | |
550 | } | |
1da177e4 | 551 | |
598ff6ba PP |
552 | mask = GID_ATTR_FIND_MASK_GID | |
553 | GID_ATTR_FIND_MASK_GID_TYPE | | |
554 | GID_ATTR_FIND_MASK_NETDEV; | |
03db3a2d | 555 | |
598ff6ba | 556 | ret = __ib_cache_gid_add(ib_dev, port, gid, attr, mask, false); |
1da177e4 LT |
557 | return ret; |
558 | } | |
1da177e4 | 559 | |
22c01ee4 PP |
560 | static int |
561 | _ib_cache_gid_del(struct ib_device *ib_dev, u8 port, | |
562 | union ib_gid *gid, struct ib_gid_attr *attr, | |
dc5640f2 | 563 | unsigned long mask, bool default_gid) |
1da177e4 | 564 | { |
03db3a2d | 565 | struct ib_gid_table *table; |
598ff6ba | 566 | int ret = 0; |
03db3a2d MB |
567 | int ix; |
568 | ||
724631a9 | 569 | table = rdma_gid_table(ib_dev, port); |
03db3a2d MB |
570 | |
571 | mutex_lock(&table->lock); | |
572 | ||
dc5640f2 | 573 | ix = find_gid(table, gid, attr, default_gid, mask, NULL); |
598ff6ba PP |
574 | if (ix < 0) { |
575 | ret = -EINVAL; | |
03db3a2d | 576 | goto out_unlock; |
598ff6ba | 577 | } |
03db3a2d | 578 | |
598ff6ba PP |
579 | del_gid(ib_dev, port, table, ix); |
580 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
581 | |
582 | out_unlock: | |
583 | mutex_unlock(&table->lock); | |
598ff6ba PP |
584 | if (ret) |
585 | pr_debug("%s: can't delete gid %pI6 error=%d\n", | |
586 | __func__, gid->raw, ret); | |
587 | return ret; | |
03db3a2d MB |
588 | } |
589 | ||
22c01ee4 PP |
590 | int ib_cache_gid_del(struct ib_device *ib_dev, u8 port, |
591 | union ib_gid *gid, struct ib_gid_attr *attr) | |
592 | { | |
dc5640f2 PP |
593 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
594 | GID_ATTR_FIND_MASK_GID_TYPE | | |
595 | GID_ATTR_FIND_MASK_DEFAULT | | |
596 | GID_ATTR_FIND_MASK_NETDEV; | |
597 | ||
598 | return _ib_cache_gid_del(ib_dev, port, gid, attr, mask, false); | |
22c01ee4 PP |
599 | } |
600 | ||
03db3a2d MB |
601 | int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, |
602 | struct net_device *ndev) | |
603 | { | |
03db3a2d MB |
604 | struct ib_gid_table *table; |
605 | int ix; | |
9c584f04 | 606 | bool deleted = false; |
03db3a2d | 607 | |
724631a9 | 608 | table = rdma_gid_table(ib_dev, port); |
03db3a2d MB |
609 | |
610 | mutex_lock(&table->lock); | |
611 | ||
598ff6ba | 612 | for (ix = 0; ix < table->sz; ix++) { |
b150c386 PP |
613 | if (is_gid_entry_valid(table->data_vec[ix]) && |
614 | table->data_vec[ix]->attr.ndev == ndev) { | |
598ff6ba PP |
615 | del_gid(ib_dev, port, table, ix); |
616 | deleted = true; | |
617 | } | |
618 | } | |
03db3a2d MB |
619 | |
620 | mutex_unlock(&table->lock); | |
9c584f04 MB |
621 | |
622 | if (deleted) | |
623 | dispatch_gid_change_event(ib_dev, port); | |
624 | ||
03db3a2d MB |
625 | return 0; |
626 | } | |
627 | ||
628 | static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index, | |
629 | union ib_gid *gid, struct ib_gid_attr *attr) | |
630 | { | |
03db3a2d | 631 | struct ib_gid_table *table; |
1da177e4 | 632 | |
724631a9 | 633 | table = rdma_gid_table(ib_dev, port); |
1da177e4 | 634 | |
03db3a2d MB |
635 | if (index < 0 || index >= table->sz) |
636 | return -EINVAL; | |
1da177e4 | 637 | |
b150c386 | 638 | if (!is_gid_entry_valid(table->data_vec[index])) |
a840c93c | 639 | return -EINVAL; |
03db3a2d | 640 | |
b150c386 | 641 | memcpy(gid, &table->data_vec[index]->attr.gid, sizeof(*gid)); |
03db3a2d | 642 | if (attr) { |
b150c386 PP |
643 | memcpy(attr, &table->data_vec[index]->attr, |
644 | sizeof(*attr)); | |
03db3a2d MB |
645 | if (attr->ndev) |
646 | dev_hold(attr->ndev); | |
647 | } | |
648 | ||
03db3a2d MB |
649 | return 0; |
650 | } | |
651 | ||
652 | static int _ib_cache_gid_table_find(struct ib_device *ib_dev, | |
653 | const union ib_gid *gid, | |
654 | const struct ib_gid_attr *val, | |
655 | unsigned long mask, | |
656 | u8 *port, u16 *index) | |
657 | { | |
03db3a2d MB |
658 | struct ib_gid_table *table; |
659 | u8 p; | |
660 | int local_index; | |
9c584f04 | 661 | unsigned long flags; |
03db3a2d MB |
662 | |
663 | for (p = 0; p < ib_dev->phys_port_cnt; p++) { | |
21d6454a | 664 | table = ib_dev->cache.ports[p].gid; |
9c584f04 | 665 | read_lock_irqsave(&table->rwlock, flags); |
cee3c4d0 | 666 | local_index = find_gid(table, gid, val, false, mask, NULL); |
03db3a2d MB |
667 | if (local_index >= 0) { |
668 | if (index) | |
669 | *index = local_index; | |
670 | if (port) | |
671 | *port = p + rdma_start_port(ib_dev); | |
9c584f04 | 672 | read_unlock_irqrestore(&table->rwlock, flags); |
03db3a2d | 673 | return 0; |
1da177e4 | 674 | } |
9c584f04 | 675 | read_unlock_irqrestore(&table->rwlock, flags); |
1da177e4 | 676 | } |
1da177e4 | 677 | |
03db3a2d MB |
678 | return -ENOENT; |
679 | } | |
680 | ||
681 | static int ib_cache_gid_find(struct ib_device *ib_dev, | |
682 | const union ib_gid *gid, | |
b39ffa1d | 683 | enum ib_gid_type gid_type, |
03db3a2d MB |
684 | struct net_device *ndev, u8 *port, |
685 | u16 *index) | |
686 | { | |
b39ffa1d MB |
687 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
688 | GID_ATTR_FIND_MASK_GID_TYPE; | |
689 | struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type}; | |
03db3a2d MB |
690 | |
691 | if (ndev) | |
692 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
693 | ||
694 | return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val, | |
695 | mask, port, index); | |
696 | } | |
697 | ||
6612b498 PP |
698 | /** |
699 | * ib_find_cached_gid_by_port - Returns the GID table index where a specified | |
700 | * GID value occurs. It searches for the specified GID value in the local | |
701 | * software cache. | |
702 | * @device: The device to query. | |
703 | * @gid: The GID value to search for. | |
704 | * @gid_type: The GID type to search for. | |
705 | * @port_num: The port number of the device where the GID value should be | |
706 | * searched. | |
707 | * @ndev: In RoCE, the net device of the device. Null means ignore. | |
708 | * @index: The index into the cached GID table where the GID was found. This | |
709 | * parameter may be NULL. | |
710 | */ | |
d300ec52 MB |
711 | int ib_find_cached_gid_by_port(struct ib_device *ib_dev, |
712 | const union ib_gid *gid, | |
b39ffa1d | 713 | enum ib_gid_type gid_type, |
d300ec52 MB |
714 | u8 port, struct net_device *ndev, |
715 | u16 *index) | |
03db3a2d MB |
716 | { |
717 | int local_index; | |
03db3a2d | 718 | struct ib_gid_table *table; |
b39ffa1d MB |
719 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
720 | GID_ATTR_FIND_MASK_GID_TYPE; | |
721 | struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type}; | |
9c584f04 | 722 | unsigned long flags; |
03db3a2d | 723 | |
24dc831b | 724 | if (!rdma_is_port_valid(ib_dev, port)) |
03db3a2d MB |
725 | return -ENOENT; |
726 | ||
724631a9 | 727 | table = rdma_gid_table(ib_dev, port); |
03db3a2d MB |
728 | |
729 | if (ndev) | |
730 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
731 | ||
9c584f04 | 732 | read_lock_irqsave(&table->rwlock, flags); |
cee3c4d0 | 733 | local_index = find_gid(table, gid, &val, false, mask, NULL); |
03db3a2d MB |
734 | if (local_index >= 0) { |
735 | if (index) | |
736 | *index = local_index; | |
9c584f04 | 737 | read_unlock_irqrestore(&table->rwlock, flags); |
03db3a2d MB |
738 | return 0; |
739 | } | |
740 | ||
9c584f04 | 741 | read_unlock_irqrestore(&table->rwlock, flags); |
03db3a2d MB |
742 | return -ENOENT; |
743 | } | |
d300ec52 | 744 | EXPORT_SYMBOL(ib_find_cached_gid_by_port); |
03db3a2d | 745 | |
99b27e3b | 746 | /** |
6612b498 | 747 | * ib_cache_gid_find_by_filter - Returns the GID table index where a specified |
99b27e3b MB |
748 | * GID value occurs |
749 | * @device: The device to query. | |
750 | * @gid: The GID value to search for. | |
751 | * @port_num: The port number of the device where the GID value could be | |
752 | * searched. | |
753 | * @filter: The filter function is executed on any matching GID in the table. | |
754 | * If the filter function returns true, the corresponding index is returned, | |
755 | * otherwise, we continue searching the GID table. It's guaranteed that | |
756 | * while filter is executed, ndev field is valid and the structure won't | |
757 | * change. filter is executed in an atomic context. filter must not be NULL. | |
6612b498 | 758 | * @index: The index into the cached GID table where the GID was found. This |
99b27e3b MB |
759 | * parameter may be NULL. |
760 | * | |
761 | * ib_cache_gid_find_by_filter() searches for the specified GID value | |
762 | * of which the filter function returns true in the port's GID table. | |
763 | * This function is only supported on RoCE ports. | |
764 | * | |
765 | */ | |
766 | static int ib_cache_gid_find_by_filter(struct ib_device *ib_dev, | |
767 | const union ib_gid *gid, | |
768 | u8 port, | |
769 | bool (*filter)(const union ib_gid *, | |
770 | const struct ib_gid_attr *, | |
771 | void *), | |
772 | void *context, | |
773 | u16 *index) | |
774 | { | |
99b27e3b MB |
775 | struct ib_gid_table *table; |
776 | unsigned int i; | |
9c584f04 | 777 | unsigned long flags; |
99b27e3b MB |
778 | bool found = false; |
779 | ||
99b27e3b | 780 | |
24dc831b | 781 | if (!rdma_is_port_valid(ib_dev, port) || |
99b27e3b MB |
782 | !rdma_protocol_roce(ib_dev, port)) |
783 | return -EPROTONOSUPPORT; | |
784 | ||
724631a9 | 785 | table = rdma_gid_table(ib_dev, port); |
99b27e3b | 786 | |
9c584f04 | 787 | read_lock_irqsave(&table->rwlock, flags); |
99b27e3b MB |
788 | for (i = 0; i < table->sz; i++) { |
789 | struct ib_gid_attr attr; | |
99b27e3b | 790 | |
b150c386 | 791 | if (!is_gid_entry_valid(table->data_vec[i])) |
151ed9d7 | 792 | continue; |
99b27e3b | 793 | |
b150c386 PP |
794 | if (memcmp(gid, &table->data_vec[i]->attr.gid, |
795 | sizeof(*gid))) | |
151ed9d7 | 796 | continue; |
99b27e3b | 797 | |
b150c386 | 798 | memcpy(&attr, &table->data_vec[i]->attr, sizeof(attr)); |
99b27e3b | 799 | |
151ed9d7 | 800 | if (filter(gid, &attr, context)) { |
99b27e3b | 801 | found = true; |
151ed9d7 PP |
802 | if (index) |
803 | *index = i; | |
99b27e3b | 804 | break; |
151ed9d7 | 805 | } |
99b27e3b | 806 | } |
9c584f04 | 807 | read_unlock_irqrestore(&table->rwlock, flags); |
99b27e3b MB |
808 | |
809 | if (!found) | |
810 | return -ENOENT; | |
99b27e3b MB |
811 | return 0; |
812 | } | |
813 | ||
03db3a2d MB |
814 | static struct ib_gid_table *alloc_gid_table(int sz) |
815 | { | |
b150c386 | 816 | struct ib_gid_table *table = kzalloc(sizeof(*table), GFP_KERNEL); |
9c584f04 | 817 | |
03db3a2d MB |
818 | if (!table) |
819 | return NULL; | |
820 | ||
821 | table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL); | |
822 | if (!table->data_vec) | |
823 | goto err_free_table; | |
824 | ||
825 | mutex_init(&table->lock); | |
826 | ||
827 | table->sz = sz; | |
9c584f04 | 828 | rwlock_init(&table->rwlock); |
03db3a2d MB |
829 | return table; |
830 | ||
831 | err_free_table: | |
832 | kfree(table); | |
833 | return NULL; | |
834 | } | |
835 | ||
b150c386 PP |
836 | static void release_gid_table(struct ib_device *device, u8 port, |
837 | struct ib_gid_table *table) | |
03db3a2d | 838 | { |
b150c386 PP |
839 | bool leak = false; |
840 | int i; | |
841 | ||
842 | if (!table) | |
843 | return; | |
844 | ||
845 | for (i = 0; i < table->sz; i++) { | |
846 | if (is_gid_entry_free(table->data_vec[i])) | |
847 | continue; | |
848 | if (kref_read(&table->data_vec[i]->kref) > 1) { | |
849 | pr_err("GID entry ref leak for %s (index %d) ref=%d\n", | |
850 | device->name, i, | |
851 | kref_read(&table->data_vec[i]->kref)); | |
852 | leak = true; | |
853 | } | |
03db3a2d | 854 | } |
b150c386 PP |
855 | if (leak) |
856 | return; | |
857 | ||
858 | kfree(table->data_vec); | |
859 | kfree(table); | |
03db3a2d MB |
860 | } |
861 | ||
862 | static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port, | |
863 | struct ib_gid_table *table) | |
864 | { | |
865 | int i; | |
9c584f04 | 866 | bool deleted = false; |
03db3a2d MB |
867 | |
868 | if (!table) | |
869 | return; | |
870 | ||
598ff6ba | 871 | mutex_lock(&table->lock); |
03db3a2d | 872 | for (i = 0; i < table->sz; ++i) { |
b150c386 | 873 | if (is_gid_entry_valid(table->data_vec[i])) { |
598ff6ba PP |
874 | del_gid(ib_dev, port, table, i); |
875 | deleted = true; | |
876 | } | |
03db3a2d | 877 | } |
598ff6ba | 878 | mutex_unlock(&table->lock); |
9c584f04 MB |
879 | |
880 | if (deleted) | |
881 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
882 | } |
883 | ||
884 | void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port, | |
885 | struct net_device *ndev, | |
b39ffa1d | 886 | unsigned long gid_type_mask, |
03db3a2d MB |
887 | enum ib_cache_gid_default_mode mode) |
888 | { | |
dc5640f2 | 889 | union ib_gid gid = { }; |
03db3a2d MB |
890 | struct ib_gid_attr gid_attr; |
891 | struct ib_gid_table *table; | |
b39ffa1d | 892 | unsigned int gid_type; |
598ff6ba | 893 | unsigned long mask; |
03db3a2d | 894 | |
724631a9 | 895 | table = rdma_gid_table(ib_dev, port); |
03db3a2d | 896 | |
dc5640f2 PP |
897 | mask = GID_ATTR_FIND_MASK_GID_TYPE | |
898 | GID_ATTR_FIND_MASK_DEFAULT | | |
899 | GID_ATTR_FIND_MASK_NETDEV; | |
03db3a2d MB |
900 | memset(&gid_attr, 0, sizeof(gid_attr)); |
901 | gid_attr.ndev = ndev; | |
902 | ||
b39ffa1d | 903 | for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) { |
b39ffa1d MB |
904 | if (1UL << gid_type & ~gid_type_mask) |
905 | continue; | |
906 | ||
907 | gid_attr.gid_type = gid_type; | |
908 | ||
b39ffa1d | 909 | if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) { |
dc5640f2 | 910 | make_default_gid(ndev, &gid); |
598ff6ba PP |
911 | __ib_cache_gid_add(ib_dev, port, &gid, |
912 | &gid_attr, mask, true); | |
913 | } else if (mode == IB_CACHE_GID_DEFAULT_MODE_DELETE) { | |
dc5640f2 PP |
914 | _ib_cache_gid_del(ib_dev, port, &gid, |
915 | &gid_attr, mask, true); | |
9c584f04 | 916 | } |
b39ffa1d | 917 | } |
03db3a2d MB |
918 | } |
919 | ||
25a1cd3f PP |
920 | static void gid_table_reserve_default(struct ib_device *ib_dev, u8 port, |
921 | struct ib_gid_table *table) | |
03db3a2d | 922 | { |
b39ffa1d MB |
923 | unsigned int i; |
924 | unsigned long roce_gid_type_mask; | |
925 | unsigned int num_default_gids; | |
b39ffa1d MB |
926 | |
927 | roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port); | |
928 | num_default_gids = hweight_long(roce_gid_type_mask); | |
1c36cf91 PP |
929 | /* Reserve starting indices for default GIDs */ |
930 | for (i = 0; i < num_default_gids && i < table->sz; i++) | |
931 | table->default_gid_indices |= BIT(i); | |
03db3a2d | 932 | } |
03db3a2d | 933 | |
be0e8f34 PP |
934 | |
935 | static void gid_table_release_one(struct ib_device *ib_dev) | |
936 | { | |
937 | struct ib_gid_table *table; | |
938 | u8 port; | |
939 | ||
940 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { | |
941 | table = ib_dev->cache.ports[port].gid; | |
b150c386 | 942 | release_gid_table(ib_dev, port, table); |
be0e8f34 PP |
943 | ib_dev->cache.ports[port].gid = NULL; |
944 | } | |
03db3a2d MB |
945 | } |
946 | ||
947 | static int _gid_table_setup_one(struct ib_device *ib_dev) | |
948 | { | |
949 | u8 port; | |
21d6454a | 950 | struct ib_gid_table *table; |
03db3a2d | 951 | |
03db3a2d MB |
952 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { |
953 | u8 rdma_port = port + rdma_start_port(ib_dev); | |
954 | ||
25a1cd3f | 955 | table = alloc_gid_table( |
03db3a2d | 956 | ib_dev->port_immutable[rdma_port].gid_tbl_len); |
be0e8f34 | 957 | if (!table) |
03db3a2d | 958 | goto rollback_table_setup; |
03db3a2d | 959 | |
25a1cd3f | 960 | gid_table_reserve_default(ib_dev, rdma_port, table); |
21d6454a | 961 | ib_dev->cache.ports[port].gid = table; |
03db3a2d | 962 | } |
03db3a2d MB |
963 | return 0; |
964 | ||
965 | rollback_table_setup: | |
be0e8f34 PP |
966 | gid_table_release_one(ib_dev); |
967 | return -ENOMEM; | |
03db3a2d MB |
968 | } |
969 | ||
970 | static void gid_table_cleanup_one(struct ib_device *ib_dev) | |
971 | { | |
21d6454a | 972 | struct ib_gid_table *table; |
03db3a2d MB |
973 | u8 port; |
974 | ||
21d6454a JW |
975 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { |
976 | table = ib_dev->cache.ports[port].gid; | |
03db3a2d | 977 | cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev), |
21d6454a JW |
978 | table); |
979 | } | |
03db3a2d MB |
980 | } |
981 | ||
982 | static int gid_table_setup_one(struct ib_device *ib_dev) | |
983 | { | |
984 | int err; | |
985 | ||
986 | err = _gid_table_setup_one(ib_dev); | |
987 | ||
988 | if (err) | |
989 | return err; | |
990 | ||
32f69e4b | 991 | rdma_roce_rescan_device(ib_dev); |
03db3a2d MB |
992 | |
993 | return err; | |
994 | } | |
995 | ||
996 | int ib_get_cached_gid(struct ib_device *device, | |
997 | u8 port_num, | |
998 | int index, | |
55ee3ab2 MB |
999 | union ib_gid *gid, |
1000 | struct ib_gid_attr *gid_attr) | |
03db3a2d | 1001 | { |
9c584f04 MB |
1002 | int res; |
1003 | unsigned long flags; | |
21d6454a | 1004 | struct ib_gid_table *table; |
9c584f04 | 1005 | |
24dc831b | 1006 | if (!rdma_is_port_valid(device, port_num)) |
03db3a2d MB |
1007 | return -EINVAL; |
1008 | ||
724631a9 | 1009 | table = rdma_gid_table(device, port_num); |
9c584f04 MB |
1010 | read_lock_irqsave(&table->rwlock, flags); |
1011 | res = __ib_cache_gid_get(device, port_num, index, gid, gid_attr); | |
1012 | read_unlock_irqrestore(&table->rwlock, flags); | |
1013 | ||
1014 | return res; | |
03db3a2d MB |
1015 | } |
1016 | EXPORT_SYMBOL(ib_get_cached_gid); | |
1017 | ||
6612b498 PP |
1018 | /** |
1019 | * ib_find_cached_gid - Returns the port number and GID table index where | |
1020 | * a specified GID value occurs. | |
1021 | * @device: The device to query. | |
1022 | * @gid: The GID value to search for. | |
1023 | * @gid_type: The GID type to search for. | |
1024 | * @ndev: In RoCE, the net device of the device. NULL means ignore. | |
1025 | * @port_num: The port number of the device where the GID value was found. | |
1026 | * @index: The index into the cached GID table where the GID was found. This | |
1027 | * parameter may be NULL. | |
1028 | * | |
1029 | * ib_find_cached_gid() searches for the specified GID value in | |
1030 | * the local software cache. | |
1031 | */ | |
03db3a2d MB |
1032 | int ib_find_cached_gid(struct ib_device *device, |
1033 | const union ib_gid *gid, | |
b39ffa1d | 1034 | enum ib_gid_type gid_type, |
55ee3ab2 | 1035 | struct net_device *ndev, |
03db3a2d MB |
1036 | u8 *port_num, |
1037 | u16 *index) | |
1038 | { | |
b39ffa1d | 1039 | return ib_cache_gid_find(device, gid, gid_type, ndev, port_num, index); |
1da177e4 LT |
1040 | } |
1041 | EXPORT_SYMBOL(ib_find_cached_gid); | |
1042 | ||
99b27e3b MB |
1043 | int ib_find_gid_by_filter(struct ib_device *device, |
1044 | const union ib_gid *gid, | |
1045 | u8 port_num, | |
1046 | bool (*filter)(const union ib_gid *gid, | |
1047 | const struct ib_gid_attr *, | |
1048 | void *), | |
1049 | void *context, u16 *index) | |
1050 | { | |
1051 | /* Only RoCE GID table supports filter function */ | |
4ab7cb4b | 1052 | if (!rdma_protocol_roce(device, port_num) && filter) |
99b27e3b MB |
1053 | return -EPROTONOSUPPORT; |
1054 | ||
1055 | return ib_cache_gid_find_by_filter(device, gid, | |
1056 | port_num, filter, | |
1057 | context, index); | |
1058 | } | |
99b27e3b | 1059 | |
1da177e4 LT |
1060 | int ib_get_cached_pkey(struct ib_device *device, |
1061 | u8 port_num, | |
1062 | int index, | |
1063 | u16 *pkey) | |
1064 | { | |
1065 | struct ib_pkey_cache *cache; | |
1066 | unsigned long flags; | |
1067 | int ret = 0; | |
1068 | ||
24dc831b | 1069 | if (!rdma_is_port_valid(device, port_num)) |
1da177e4 LT |
1070 | return -EINVAL; |
1071 | ||
1072 | read_lock_irqsave(&device->cache.lock, flags); | |
1073 | ||
21d6454a | 1074 | cache = device->cache.ports[port_num - rdma_start_port(device)].pkey; |
1da177e4 LT |
1075 | |
1076 | if (index < 0 || index >= cache->table_len) | |
1077 | ret = -EINVAL; | |
1078 | else | |
1079 | *pkey = cache->table[index]; | |
1080 | ||
1081 | read_unlock_irqrestore(&device->cache.lock, flags); | |
1082 | ||
1083 | return ret; | |
1084 | } | |
1085 | EXPORT_SYMBOL(ib_get_cached_pkey); | |
1086 | ||
883c71fe DJ |
1087 | int ib_get_cached_subnet_prefix(struct ib_device *device, |
1088 | u8 port_num, | |
1089 | u64 *sn_pfx) | |
1090 | { | |
1091 | unsigned long flags; | |
1092 | int p; | |
1093 | ||
6d5b2047 | 1094 | if (!rdma_is_port_valid(device, port_num)) |
883c71fe DJ |
1095 | return -EINVAL; |
1096 | ||
1097 | p = port_num - rdma_start_port(device); | |
1098 | read_lock_irqsave(&device->cache.lock, flags); | |
1099 | *sn_pfx = device->cache.ports[p].subnet_prefix; | |
1100 | read_unlock_irqrestore(&device->cache.lock, flags); | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | EXPORT_SYMBOL(ib_get_cached_subnet_prefix); | |
1105 | ||
1da177e4 LT |
1106 | int ib_find_cached_pkey(struct ib_device *device, |
1107 | u8 port_num, | |
1108 | u16 pkey, | |
1109 | u16 *index) | |
1110 | { | |
1111 | struct ib_pkey_cache *cache; | |
1112 | unsigned long flags; | |
1113 | int i; | |
1114 | int ret = -ENOENT; | |
ff7166c4 | 1115 | int partial_ix = -1; |
1da177e4 | 1116 | |
24dc831b | 1117 | if (!rdma_is_port_valid(device, port_num)) |
1da177e4 LT |
1118 | return -EINVAL; |
1119 | ||
1120 | read_lock_irqsave(&device->cache.lock, flags); | |
1121 | ||
21d6454a | 1122 | cache = device->cache.ports[port_num - rdma_start_port(device)].pkey; |
1da177e4 LT |
1123 | |
1124 | *index = -1; | |
1125 | ||
1126 | for (i = 0; i < cache->table_len; ++i) | |
1127 | if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) { | |
ff7166c4 JM |
1128 | if (cache->table[i] & 0x8000) { |
1129 | *index = i; | |
1130 | ret = 0; | |
1131 | break; | |
1132 | } else | |
1133 | partial_ix = i; | |
1da177e4 LT |
1134 | } |
1135 | ||
ff7166c4 JM |
1136 | if (ret && partial_ix >= 0) { |
1137 | *index = partial_ix; | |
1138 | ret = 0; | |
1139 | } | |
1140 | ||
1da177e4 LT |
1141 | read_unlock_irqrestore(&device->cache.lock, flags); |
1142 | ||
1143 | return ret; | |
1144 | } | |
1145 | EXPORT_SYMBOL(ib_find_cached_pkey); | |
1146 | ||
73aaa741 JM |
1147 | int ib_find_exact_cached_pkey(struct ib_device *device, |
1148 | u8 port_num, | |
1149 | u16 pkey, | |
1150 | u16 *index) | |
1151 | { | |
1152 | struct ib_pkey_cache *cache; | |
1153 | unsigned long flags; | |
1154 | int i; | |
1155 | int ret = -ENOENT; | |
1156 | ||
24dc831b | 1157 | if (!rdma_is_port_valid(device, port_num)) |
73aaa741 JM |
1158 | return -EINVAL; |
1159 | ||
1160 | read_lock_irqsave(&device->cache.lock, flags); | |
1161 | ||
21d6454a | 1162 | cache = device->cache.ports[port_num - rdma_start_port(device)].pkey; |
73aaa741 JM |
1163 | |
1164 | *index = -1; | |
1165 | ||
1166 | for (i = 0; i < cache->table_len; ++i) | |
1167 | if (cache->table[i] == pkey) { | |
1168 | *index = i; | |
1169 | ret = 0; | |
1170 | break; | |
1171 | } | |
1172 | ||
1173 | read_unlock_irqrestore(&device->cache.lock, flags); | |
1174 | ||
1175 | return ret; | |
1176 | } | |
1177 | EXPORT_SYMBOL(ib_find_exact_cached_pkey); | |
1178 | ||
6fb9cdbf JM |
1179 | int ib_get_cached_lmc(struct ib_device *device, |
1180 | u8 port_num, | |
1181 | u8 *lmc) | |
1182 | { | |
1183 | unsigned long flags; | |
1184 | int ret = 0; | |
1185 | ||
24dc831b | 1186 | if (!rdma_is_port_valid(device, port_num)) |
6fb9cdbf JM |
1187 | return -EINVAL; |
1188 | ||
1189 | read_lock_irqsave(&device->cache.lock, flags); | |
21d6454a | 1190 | *lmc = device->cache.ports[port_num - rdma_start_port(device)].lmc; |
6fb9cdbf JM |
1191 | read_unlock_irqrestore(&device->cache.lock, flags); |
1192 | ||
1193 | return ret; | |
1194 | } | |
1195 | EXPORT_SYMBOL(ib_get_cached_lmc); | |
1196 | ||
9e2c3f1c JW |
1197 | int ib_get_cached_port_state(struct ib_device *device, |
1198 | u8 port_num, | |
1199 | enum ib_port_state *port_state) | |
1200 | { | |
1201 | unsigned long flags; | |
1202 | int ret = 0; | |
1203 | ||
6d5b2047 | 1204 | if (!rdma_is_port_valid(device, port_num)) |
9e2c3f1c JW |
1205 | return -EINVAL; |
1206 | ||
1207 | read_lock_irqsave(&device->cache.lock, flags); | |
21d6454a JW |
1208 | *port_state = device->cache.ports[port_num |
1209 | - rdma_start_port(device)].port_state; | |
9e2c3f1c JW |
1210 | read_unlock_irqrestore(&device->cache.lock, flags); |
1211 | ||
1212 | return ret; | |
1213 | } | |
1214 | EXPORT_SYMBOL(ib_get_cached_port_state); | |
1215 | ||
bf399c2c PP |
1216 | /** |
1217 | * rdma_get_gid_attr - Returns GID attributes for a port of a device | |
1218 | * at a requested gid_index, if a valid GID entry exists. | |
1219 | * @device: The device to query. | |
1220 | * @port_num: The port number on the device where the GID value | |
1221 | * is to be queried. | |
1222 | * @index: Index of the GID table entry whose attributes are to | |
1223 | * be queried. | |
1224 | * | |
1225 | * rdma_get_gid_attr() acquires reference count of gid attributes from the | |
1226 | * cached GID table. Caller must invoke rdma_put_gid_attr() to release | |
1227 | * reference to gid attribute regardless of link layer. | |
1228 | * | |
1229 | * Returns pointer to valid gid attribute or ERR_PTR for the appropriate error | |
1230 | * code. | |
1231 | */ | |
1232 | const struct ib_gid_attr * | |
1233 | rdma_get_gid_attr(struct ib_device *device, u8 port_num, int index) | |
1234 | { | |
1235 | const struct ib_gid_attr *attr = ERR_PTR(-EINVAL); | |
1236 | struct ib_gid_table *table; | |
1237 | unsigned long flags; | |
1238 | ||
1239 | if (!rdma_is_port_valid(device, port_num)) | |
1240 | return ERR_PTR(-EINVAL); | |
1241 | ||
1242 | table = rdma_gid_table(device, port_num); | |
1243 | if (index < 0 || index >= table->sz) | |
1244 | return ERR_PTR(-EINVAL); | |
1245 | ||
1246 | read_lock_irqsave(&table->rwlock, flags); | |
1247 | if (!is_gid_entry_valid(table->data_vec[index])) | |
1248 | goto done; | |
1249 | ||
1250 | get_gid_entry(table->data_vec[index]); | |
1251 | attr = &table->data_vec[index]->attr; | |
1252 | done: | |
1253 | read_unlock_irqrestore(&table->rwlock, flags); | |
1254 | return attr; | |
1255 | } | |
1256 | EXPORT_SYMBOL(rdma_get_gid_attr); | |
1257 | ||
1258 | /** | |
1259 | * rdma_put_gid_attr - Release reference to the GID attribute | |
1260 | * @attr: Pointer to the GID attribute whose reference | |
1261 | * needs to be released. | |
1262 | * | |
1263 | * rdma_put_gid_attr() must be used to release reference whose | |
1264 | * reference is acquired using rdma_get_gid_attr() or any APIs | |
1265 | * which returns a pointer to the ib_gid_attr regardless of link layer | |
1266 | * of IB or RoCE. | |
1267 | * | |
1268 | */ | |
1269 | void rdma_put_gid_attr(const struct ib_gid_attr *attr) | |
1270 | { | |
1271 | struct ib_gid_table_entry *entry = | |
1272 | container_of(attr, struct ib_gid_table_entry, attr); | |
1273 | ||
1274 | put_gid_entry(entry); | |
1275 | } | |
1276 | EXPORT_SYMBOL(rdma_put_gid_attr); | |
1277 | ||
1278 | /** | |
1279 | * rdma_hold_gid_attr - Get reference to existing GID attribute | |
1280 | * | |
1281 | * @attr: Pointer to the GID attribute whose reference | |
1282 | * needs to be taken. | |
1283 | * | |
1284 | * Increase the reference count to a GID attribute to keep it from being | |
1285 | * freed. Callers are required to already be holding a reference to attribute. | |
1286 | * | |
1287 | */ | |
1288 | void rdma_hold_gid_attr(const struct ib_gid_attr *attr) | |
1289 | { | |
1290 | struct ib_gid_table_entry *entry = | |
1291 | container_of(attr, struct ib_gid_table_entry, attr); | |
1292 | ||
1293 | get_gid_entry(entry); | |
1294 | } | |
1295 | EXPORT_SYMBOL(rdma_hold_gid_attr); | |
1296 | ||
598ff6ba PP |
1297 | static int config_non_roce_gid_cache(struct ib_device *device, |
1298 | u8 port, int gid_tbl_len) | |
1299 | { | |
1300 | struct ib_gid_attr gid_attr = {}; | |
1301 | struct ib_gid_table *table; | |
598ff6ba PP |
1302 | int ret = 0; |
1303 | int i; | |
1304 | ||
1305 | gid_attr.device = device; | |
1306 | gid_attr.port_num = port; | |
724631a9 | 1307 | table = rdma_gid_table(device, port); |
598ff6ba PP |
1308 | |
1309 | mutex_lock(&table->lock); | |
1310 | for (i = 0; i < gid_tbl_len; ++i) { | |
1311 | if (!device->query_gid) | |
1312 | continue; | |
b150c386 | 1313 | ret = device->query_gid(device, port, i, &gid_attr.gid); |
598ff6ba PP |
1314 | if (ret) { |
1315 | pr_warn("query_gid failed (%d) for %s (index %d)\n", | |
1316 | ret, device->name, i); | |
1317 | goto err; | |
1318 | } | |
1319 | gid_attr.index = i; | |
b150c386 | 1320 | add_modify_gid(table, &gid_attr); |
598ff6ba PP |
1321 | } |
1322 | err: | |
1323 | mutex_unlock(&table->lock); | |
1324 | return ret; | |
1325 | } | |
1326 | ||
1da177e4 | 1327 | static void ib_cache_update(struct ib_device *device, |
d291f1a6 DJ |
1328 | u8 port, |
1329 | bool enforce_security) | |
1da177e4 LT |
1330 | { |
1331 | struct ib_port_attr *tprops = NULL; | |
1332 | struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache; | |
1da177e4 LT |
1333 | int i; |
1334 | int ret; | |
03db3a2d | 1335 | struct ib_gid_table *table; |
03db3a2d | 1336 | |
24dc831b | 1337 | if (!rdma_is_port_valid(device, port)) |
03db3a2d MB |
1338 | return; |
1339 | ||
724631a9 | 1340 | table = rdma_gid_table(device, port); |
1da177e4 LT |
1341 | |
1342 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); | |
1343 | if (!tprops) | |
1344 | return; | |
1345 | ||
1346 | ret = ib_query_port(device, port, tprops); | |
1347 | if (ret) { | |
aba25a3e PP |
1348 | pr_warn("ib_query_port failed (%d) for %s\n", |
1349 | ret, device->name); | |
1da177e4 LT |
1350 | goto err; |
1351 | } | |
1352 | ||
598ff6ba PP |
1353 | if (!rdma_protocol_roce(device, port)) { |
1354 | ret = config_non_roce_gid_cache(device, port, | |
1355 | tprops->gid_tbl_len); | |
1356 | if (ret) | |
1357 | goto err; | |
1358 | } | |
1359 | ||
acafe7e3 KC |
1360 | pkey_cache = kmalloc(struct_size(pkey_cache, table, |
1361 | tprops->pkey_tbl_len), | |
1362 | GFP_KERNEL); | |
1da177e4 LT |
1363 | if (!pkey_cache) |
1364 | goto err; | |
1365 | ||
1366 | pkey_cache->table_len = tprops->pkey_tbl_len; | |
1367 | ||
1da177e4 LT |
1368 | for (i = 0; i < pkey_cache->table_len; ++i) { |
1369 | ret = ib_query_pkey(device, port, i, pkey_cache->table + i); | |
1370 | if (ret) { | |
aba25a3e PP |
1371 | pr_warn("ib_query_pkey failed (%d) for %s (index %d)\n", |
1372 | ret, device->name, i); | |
1da177e4 LT |
1373 | goto err; |
1374 | } | |
1375 | } | |
1376 | ||
1da177e4 LT |
1377 | write_lock_irq(&device->cache.lock); |
1378 | ||
21d6454a JW |
1379 | old_pkey_cache = device->cache.ports[port - |
1380 | rdma_start_port(device)].pkey; | |
1da177e4 | 1381 | |
21d6454a | 1382 | device->cache.ports[port - rdma_start_port(device)].pkey = pkey_cache; |
21d6454a JW |
1383 | device->cache.ports[port - rdma_start_port(device)].lmc = tprops->lmc; |
1384 | device->cache.ports[port - rdma_start_port(device)].port_state = | |
aaaca121 | 1385 | tprops->state; |
6fb9cdbf | 1386 | |
883c71fe DJ |
1387 | device->cache.ports[port - rdma_start_port(device)].subnet_prefix = |
1388 | tprops->subnet_prefix; | |
1da177e4 LT |
1389 | write_unlock_irq(&device->cache.lock); |
1390 | ||
d291f1a6 DJ |
1391 | if (enforce_security) |
1392 | ib_security_cache_change(device, | |
1393 | port, | |
1394 | tprops->subnet_prefix); | |
1395 | ||
1da177e4 | 1396 | kfree(old_pkey_cache); |
1da177e4 LT |
1397 | kfree(tprops); |
1398 | return; | |
1399 | ||
1400 | err: | |
1401 | kfree(pkey_cache); | |
1da177e4 LT |
1402 | kfree(tprops); |
1403 | } | |
1404 | ||
c4028958 | 1405 | static void ib_cache_task(struct work_struct *_work) |
1da177e4 | 1406 | { |
c4028958 DH |
1407 | struct ib_update_work *work = |
1408 | container_of(_work, struct ib_update_work, work); | |
1da177e4 | 1409 | |
d291f1a6 DJ |
1410 | ib_cache_update(work->device, |
1411 | work->port_num, | |
1412 | work->enforce_security); | |
1da177e4 LT |
1413 | kfree(work); |
1414 | } | |
1415 | ||
1416 | static void ib_cache_event(struct ib_event_handler *handler, | |
1417 | struct ib_event *event) | |
1418 | { | |
1419 | struct ib_update_work *work; | |
1420 | ||
1421 | if (event->event == IB_EVENT_PORT_ERR || | |
1422 | event->event == IB_EVENT_PORT_ACTIVE || | |
1423 | event->event == IB_EVENT_LID_CHANGE || | |
1424 | event->event == IB_EVENT_PKEY_CHANGE || | |
acaea9ee | 1425 | event->event == IB_EVENT_SM_CHANGE || |
761d90ed OG |
1426 | event->event == IB_EVENT_CLIENT_REREGISTER || |
1427 | event->event == IB_EVENT_GID_CHANGE) { | |
1da177e4 LT |
1428 | work = kmalloc(sizeof *work, GFP_ATOMIC); |
1429 | if (work) { | |
c4028958 | 1430 | INIT_WORK(&work->work, ib_cache_task); |
1da177e4 LT |
1431 | work->device = event->device; |
1432 | work->port_num = event->element.port_num; | |
d291f1a6 DJ |
1433 | if (event->event == IB_EVENT_PKEY_CHANGE || |
1434 | event->event == IB_EVENT_GID_CHANGE) | |
1435 | work->enforce_security = true; | |
1436 | else | |
1437 | work->enforce_security = false; | |
1438 | ||
f0626710 | 1439 | queue_work(ib_wq, &work->work); |
1da177e4 LT |
1440 | } |
1441 | } | |
1442 | } | |
1443 | ||
03db3a2d | 1444 | int ib_cache_setup_one(struct ib_device *device) |
1da177e4 LT |
1445 | { |
1446 | int p; | |
03db3a2d | 1447 | int err; |
1da177e4 LT |
1448 | |
1449 | rwlock_init(&device->cache.lock); | |
1450 | ||
21d6454a | 1451 | device->cache.ports = |
6396bb22 KC |
1452 | kcalloc(rdma_end_port(device) - rdma_start_port(device) + 1, |
1453 | sizeof(*device->cache.ports), | |
1454 | GFP_KERNEL); | |
dcc9881e LR |
1455 | if (!device->cache.ports) |
1456 | return -ENOMEM; | |
1da177e4 | 1457 | |
03db3a2d | 1458 | err = gid_table_setup_one(device); |
dcc9881e LR |
1459 | if (err) { |
1460 | kfree(device->cache.ports); | |
1461 | device->cache.ports = NULL; | |
1462 | return err; | |
1463 | } | |
03db3a2d | 1464 | |
55aeed06 | 1465 | for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p) |
d291f1a6 | 1466 | ib_cache_update(device, p + rdma_start_port(device), true); |
1da177e4 LT |
1467 | |
1468 | INIT_IB_EVENT_HANDLER(&device->cache.event_handler, | |
1469 | device, ib_cache_event); | |
dcc9881e | 1470 | ib_register_event_handler(&device->cache.event_handler); |
03db3a2d | 1471 | return 0; |
1da177e4 LT |
1472 | } |
1473 | ||
03db3a2d | 1474 | void ib_cache_release_one(struct ib_device *device) |
1da177e4 LT |
1475 | { |
1476 | int p; | |
1477 | ||
03db3a2d MB |
1478 | /* |
1479 | * The release function frees all the cache elements. | |
1480 | * This function should be called as part of freeing | |
1481 | * all the device's resources when the cache could no | |
1482 | * longer be accessed. | |
1483 | */ | |
21d6454a JW |
1484 | for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p) |
1485 | kfree(device->cache.ports[p].pkey); | |
03db3a2d MB |
1486 | |
1487 | gid_table_release_one(device); | |
21d6454a | 1488 | kfree(device->cache.ports); |
1da177e4 LT |
1489 | } |
1490 | ||
03db3a2d MB |
1491 | void ib_cache_cleanup_one(struct ib_device *device) |
1492 | { | |
1493 | /* The cleanup function unregisters the event handler, | |
1494 | * waits for all in-progress workqueue elements and cleans | |
1495 | * up the GID cache. This function should be called after | |
1496 | * the device was removed from the devices list and all | |
1497 | * clients were removed, so the cache exists but is | |
1498 | * non-functional and shouldn't be updated anymore. | |
1499 | */ | |
1500 | ib_unregister_event_handler(&device->cache.event_handler); | |
1501 | flush_workqueue(ib_wq); | |
1502 | gid_table_cleanup_one(device); | |
b150c386 PP |
1503 | |
1504 | /* | |
1505 | * Flush the wq second time for any pending GID delete work. | |
1506 | */ | |
1507 | flush_workqueue(ib_wq); | |
03db3a2d | 1508 | } |