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 | ||
69 | enum gid_table_entry_props { | |
70 | GID_TABLE_ENTRY_INVALID = 1UL << 0, | |
71 | GID_TABLE_ENTRY_DEFAULT = 1UL << 1, | |
72 | }; | |
73 | ||
03db3a2d | 74 | struct ib_gid_table_entry { |
03db3a2d MB |
75 | unsigned long props; |
76 | union ib_gid gid; | |
77 | struct ib_gid_attr attr; | |
78 | void *context; | |
79 | }; | |
80 | ||
81 | struct ib_gid_table { | |
82 | int sz; | |
83 | /* In RoCE, adding a GID to the table requires: | |
84 | * (a) Find if this GID is already exists. | |
85 | * (b) Find a free space. | |
86 | * (c) Write the new GID | |
87 | * | |
88 | * Delete requires different set of operations: | |
89 | * (a) Find the GID | |
90 | * (b) Delete it. | |
91 | * | |
03db3a2d | 92 | **/ |
598ff6ba PP |
93 | /* Any writer to data_vec must hold this lock and the write side of |
94 | * rwlock. readers must hold only rwlock. All writers must be in a | |
95 | * sleepable context. | |
9c584f04 | 96 | */ |
598ff6ba PP |
97 | struct mutex lock; |
98 | /* rwlock protects data_vec[ix]->props. */ | |
9c584f04 | 99 | rwlock_t rwlock; |
03db3a2d MB |
100 | struct ib_gid_table_entry *data_vec; |
101 | }; | |
102 | ||
f3906bd3 MB |
103 | static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port) |
104 | { | |
3401857e | 105 | struct ib_event event; |
f3906bd3 | 106 | |
3401857e PP |
107 | event.device = ib_dev; |
108 | event.element.port_num = port; | |
109 | event.event = IB_EVENT_GID_CHANGE; | |
f3906bd3 | 110 | |
3401857e | 111 | ib_dispatch_event(&event); |
f3906bd3 MB |
112 | } |
113 | ||
b39ffa1d MB |
114 | static const char * const gid_type_str[] = { |
115 | [IB_GID_TYPE_IB] = "IB/RoCE v1", | |
7766a99f | 116 | [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2", |
b39ffa1d MB |
117 | }; |
118 | ||
119 | const char *ib_cache_gid_type_str(enum ib_gid_type gid_type) | |
120 | { | |
121 | if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type]) | |
122 | return gid_type_str[gid_type]; | |
123 | ||
124 | return "Invalid GID type"; | |
125 | } | |
126 | EXPORT_SYMBOL(ib_cache_gid_type_str); | |
127 | ||
045959db MB |
128 | int ib_cache_gid_parse_type_str(const char *buf) |
129 | { | |
130 | unsigned int i; | |
131 | size_t len; | |
132 | int err = -EINVAL; | |
133 | ||
134 | len = strlen(buf); | |
135 | if (len == 0) | |
136 | return -EINVAL; | |
137 | ||
138 | if (buf[len - 1] == '\n') | |
139 | len--; | |
140 | ||
141 | for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i) | |
142 | if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) && | |
143 | len == strlen(gid_type_str[i])) { | |
144 | err = i; | |
145 | break; | |
146 | } | |
147 | ||
148 | return err; | |
149 | } | |
150 | EXPORT_SYMBOL(ib_cache_gid_parse_type_str); | |
151 | ||
598ff6ba PP |
152 | static void del_roce_gid(struct ib_device *device, u8 port_num, |
153 | struct ib_gid_table *table, int ix) | |
1da177e4 | 154 | { |
598ff6ba PP |
155 | pr_debug("%s device=%s port=%d index=%d gid %pI6\n", __func__, |
156 | device->name, port_num, ix, | |
157 | table->data_vec[ix].gid.raw); | |
158 | ||
159 | if (rdma_cap_roce_gid_table(device, port_num)) | |
414448d2 | 160 | device->del_gid(&table->data_vec[ix].attr, |
598ff6ba PP |
161 | &table->data_vec[ix].context); |
162 | dev_put(table->data_vec[ix].attr.ndev); | |
163 | } | |
03db3a2d | 164 | |
598ff6ba PP |
165 | static int add_roce_gid(struct ib_gid_table *table, |
166 | const union ib_gid *gid, | |
167 | const struct ib_gid_attr *attr) | |
168 | { | |
169 | struct ib_gid_table_entry *entry; | |
170 | int ix = attr->index; | |
171 | int ret = 0; | |
03db3a2d | 172 | |
598ff6ba PP |
173 | if (!attr->ndev) { |
174 | pr_err("%s NULL netdev device=%s port=%d index=%d\n", | |
175 | __func__, attr->device->name, attr->port_num, | |
176 | attr->index); | |
177 | return -EINVAL; | |
03db3a2d MB |
178 | } |
179 | ||
598ff6ba PP |
180 | entry = &table->data_vec[ix]; |
181 | if ((entry->props & GID_TABLE_ENTRY_INVALID) == 0) { | |
182 | WARN(1, "GID table corruption device=%s port=%d index=%d\n", | |
183 | attr->device->name, attr->port_num, | |
184 | attr->index); | |
185 | return -EINVAL; | |
03db3a2d | 186 | } |
8e787646 | 187 | |
598ff6ba | 188 | if (rdma_cap_roce_gid_table(attr->device, attr->port_num)) { |
414448d2 | 189 | ret = attr->device->add_gid(gid, attr, &entry->context); |
598ff6ba PP |
190 | if (ret) { |
191 | pr_err("%s GID add failed device=%s port=%d index=%d\n", | |
192 | __func__, attr->device->name, attr->port_num, | |
193 | attr->index); | |
194 | goto add_err; | |
195 | } | |
8e787646 | 196 | } |
598ff6ba | 197 | dev_hold(attr->ndev); |
03db3a2d | 198 | |
598ff6ba PP |
199 | add_err: |
200 | if (!ret) | |
201 | pr_debug("%s device=%s port=%d index=%d gid %pI6\n", __func__, | |
202 | attr->device->name, attr->port_num, ix, gid->raw); | |
03db3a2d MB |
203 | return ret; |
204 | } | |
205 | ||
598ff6ba PP |
206 | /** |
207 | * add_modify_gid - Add or modify GID table entry | |
208 | * | |
209 | * @table: GID table in which GID to be added or modified | |
210 | * @gid: GID content | |
211 | * @attr: Attributes of the GID | |
212 | * | |
213 | * Returns 0 on success or appropriate error code. It accepts zero | |
214 | * GID addition for non RoCE ports for HCA's who report them as valid | |
215 | * GID. However such zero GIDs are not added to the cache. | |
216 | */ | |
217 | static int add_modify_gid(struct ib_gid_table *table, | |
218 | const union ib_gid *gid, | |
219 | const struct ib_gid_attr *attr) | |
220 | { | |
221 | int ret; | |
222 | ||
223 | if (rdma_protocol_roce(attr->device, attr->port_num)) { | |
224 | ret = add_roce_gid(table, gid, attr); | |
225 | if (ret) | |
226 | return ret; | |
227 | } else { | |
228 | /* | |
229 | * Some HCA's report multiple GID entries with only one | |
230 | * valid GID, but remaining as zero GID. | |
231 | * So ignore such behavior for IB link layer and don't | |
232 | * fail the call, but don't add such entry to GID cache. | |
233 | */ | |
234 | if (!memcmp(gid, &zgid, sizeof(*gid))) | |
235 | return 0; | |
236 | } | |
237 | ||
238 | lockdep_assert_held(&table->lock); | |
239 | memcpy(&table->data_vec[attr->index].gid, gid, sizeof(*gid)); | |
240 | memcpy(&table->data_vec[attr->index].attr, attr, sizeof(*attr)); | |
03db3a2d | 241 | |
598ff6ba PP |
242 | write_lock_irq(&table->rwlock); |
243 | table->data_vec[attr->index].props &= ~GID_TABLE_ENTRY_INVALID; | |
244 | write_unlock_irq(&table->rwlock); | |
245 | return 0; | |
03db3a2d MB |
246 | } |
247 | ||
598ff6ba PP |
248 | /** |
249 | * del_gid - Delete GID table entry | |
250 | * | |
251 | * @ib_dev: IB device whose GID entry to be deleted | |
252 | * @port: Port number of the IB device | |
253 | * @table: GID table of the IB device for a port | |
254 | * @ix: GID entry index to delete | |
255 | * | |
256 | */ | |
257 | static void del_gid(struct ib_device *ib_dev, u8 port, | |
258 | struct ib_gid_table *table, int ix) | |
259 | { | |
260 | lockdep_assert_held(&table->lock); | |
261 | write_lock_irq(&table->rwlock); | |
262 | table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID; | |
263 | write_unlock_irq(&table->rwlock); | |
264 | ||
265 | if (rdma_protocol_roce(ib_dev, port)) | |
266 | del_roce_gid(ib_dev, port, table, ix); | |
267 | memcpy(&table->data_vec[ix].gid, &zgid, sizeof(zgid)); | |
268 | memset(&table->data_vec[ix].attr, 0, sizeof(table->data_vec[ix].attr)); | |
269 | table->data_vec[ix].context = NULL; | |
03db3a2d MB |
270 | } |
271 | ||
598ff6ba | 272 | /* rwlock should be read locked, or lock should be held */ |
03db3a2d MB |
273 | static int find_gid(struct ib_gid_table *table, const union ib_gid *gid, |
274 | const struct ib_gid_attr *val, bool default_gid, | |
cee3c4d0 | 275 | unsigned long mask, int *pempty) |
03db3a2d | 276 | { |
cee3c4d0 MB |
277 | int i = 0; |
278 | int found = -1; | |
279 | int empty = pempty ? -1 : 0; | |
03db3a2d | 280 | |
cee3c4d0 MB |
281 | while (i < table->sz && (found < 0 || empty < 0)) { |
282 | struct ib_gid_table_entry *data = &table->data_vec[i]; | |
283 | struct ib_gid_attr *attr = &data->attr; | |
284 | int curr_index = i; | |
03db3a2d | 285 | |
cee3c4d0 | 286 | i++; |
03db3a2d | 287 | |
598ff6ba PP |
288 | /* find_gid() is used during GID addition where it is expected |
289 | * to return a free entry slot which is not duplicate. | |
290 | * Free entry slot is requested and returned if pempty is set, | |
291 | * so lookup free slot only if requested. | |
292 | */ | |
293 | if (pempty && empty < 0) { | |
a66ed149 PP |
294 | if (data->props & GID_TABLE_ENTRY_INVALID && |
295 | (default_gid == | |
296 | !!(data->props & GID_TABLE_ENTRY_DEFAULT))) { | |
297 | /* | |
298 | * Found an invalid (free) entry; allocate it. | |
299 | * If default GID is requested, then our | |
300 | * found slot must be one of the DEFAULT | |
301 | * reserved slots or we fail. | |
302 | * This ensures that only DEFAULT reserved | |
303 | * slots are used for default property GIDs. | |
304 | */ | |
305 | empty = curr_index; | |
598ff6ba PP |
306 | } |
307 | } | |
308 | ||
309 | /* | |
310 | * Additionally find_gid() is used to find valid entry during | |
311 | * lookup operation, where validity needs to be checked. So | |
312 | * find the empty entry first to continue to search for a free | |
313 | * slot and ignore its INVALID flag. | |
314 | */ | |
cee3c4d0 MB |
315 | if (data->props & GID_TABLE_ENTRY_INVALID) |
316 | continue; | |
317 | ||
cee3c4d0 | 318 | if (found >= 0) |
9c584f04 | 319 | continue; |
03db3a2d | 320 | |
b39ffa1d MB |
321 | if (mask & GID_ATTR_FIND_MASK_GID_TYPE && |
322 | attr->gid_type != val->gid_type) | |
323 | continue; | |
324 | ||
03db3a2d | 325 | if (mask & GID_ATTR_FIND_MASK_GID && |
cee3c4d0 | 326 | memcmp(gid, &data->gid, sizeof(*gid))) |
9c584f04 | 327 | continue; |
03db3a2d MB |
328 | |
329 | if (mask & GID_ATTR_FIND_MASK_NETDEV && | |
330 | attr->ndev != val->ndev) | |
9c584f04 | 331 | continue; |
03db3a2d MB |
332 | |
333 | if (mask & GID_ATTR_FIND_MASK_DEFAULT && | |
cee3c4d0 | 334 | !!(data->props & GID_TABLE_ENTRY_DEFAULT) != |
03db3a2d | 335 | default_gid) |
9c584f04 | 336 | continue; |
03db3a2d | 337 | |
cee3c4d0 | 338 | found = curr_index; |
03db3a2d MB |
339 | } |
340 | ||
cee3c4d0 MB |
341 | if (pempty) |
342 | *pempty = empty; | |
343 | ||
344 | return found; | |
03db3a2d MB |
345 | } |
346 | ||
347 | static void make_default_gid(struct net_device *dev, union ib_gid *gid) | |
348 | { | |
349 | gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); | |
350 | addrconf_ifid_eui48(&gid->raw[8], dev); | |
351 | } | |
352 | ||
598ff6ba PP |
353 | static int __ib_cache_gid_add(struct ib_device *ib_dev, u8 port, |
354 | union ib_gid *gid, struct ib_gid_attr *attr, | |
355 | unsigned long mask, bool default_gid) | |
03db3a2d | 356 | { |
03db3a2d | 357 | struct ib_gid_table *table; |
1da177e4 | 358 | int ret = 0; |
cee3c4d0 | 359 | int empty; |
598ff6ba | 360 | int ix; |
1da177e4 | 361 | |
598ff6ba PP |
362 | /* Do not allow adding zero GID in support of |
363 | * IB spec version 1.3 section 4.1.1 point (6) and | |
364 | * section 12.7.10 and section 12.7.20 | |
365 | */ | |
03db3a2d | 366 | if (!memcmp(gid, &zgid, sizeof(*gid))) |
1da177e4 LT |
367 | return -EINVAL; |
368 | ||
598ff6ba PP |
369 | table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; |
370 | ||
371 | mutex_lock(&table->lock); | |
372 | ||
373 | ix = find_gid(table, gid, attr, default_gid, mask, &empty); | |
374 | if (ix >= 0) | |
375 | goto out_unlock; | |
376 | ||
377 | if (empty < 0) { | |
378 | ret = -ENOSPC; | |
379 | goto out_unlock; | |
380 | } | |
381 | attr->device = ib_dev; | |
382 | attr->index = empty; | |
383 | attr->port_num = port; | |
384 | ret = add_modify_gid(table, gid, attr); | |
385 | if (!ret) | |
386 | dispatch_gid_change_event(ib_dev, port); | |
387 | ||
388 | out_unlock: | |
389 | mutex_unlock(&table->lock); | |
390 | if (ret) | |
391 | pr_warn("%s: unable to add gid %pI6 error=%d\n", | |
392 | __func__, gid->raw, ret); | |
393 | return ret; | |
394 | } | |
395 | ||
396 | int ib_cache_gid_add(struct ib_device *ib_dev, u8 port, | |
397 | union ib_gid *gid, struct ib_gid_attr *attr) | |
398 | { | |
399 | struct net_device *idev; | |
400 | unsigned long mask; | |
401 | int ret; | |
402 | ||
03db3a2d MB |
403 | if (ib_dev->get_netdev) { |
404 | idev = ib_dev->get_netdev(ib_dev, port); | |
405 | if (idev && attr->ndev != idev) { | |
406 | union ib_gid default_gid; | |
1da177e4 | 407 | |
03db3a2d MB |
408 | /* Adding default GIDs in not permitted */ |
409 | make_default_gid(idev, &default_gid); | |
410 | if (!memcmp(gid, &default_gid, sizeof(*gid))) { | |
411 | dev_put(idev); | |
412 | return -EPERM; | |
413 | } | |
414 | } | |
415 | if (idev) | |
416 | dev_put(idev); | |
417 | } | |
1da177e4 | 418 | |
598ff6ba PP |
419 | mask = GID_ATTR_FIND_MASK_GID | |
420 | GID_ATTR_FIND_MASK_GID_TYPE | | |
421 | GID_ATTR_FIND_MASK_NETDEV; | |
03db3a2d | 422 | |
598ff6ba | 423 | ret = __ib_cache_gid_add(ib_dev, port, gid, attr, mask, false); |
1da177e4 LT |
424 | return ret; |
425 | } | |
1da177e4 | 426 | |
22c01ee4 PP |
427 | static int |
428 | _ib_cache_gid_del(struct ib_device *ib_dev, u8 port, | |
429 | union ib_gid *gid, struct ib_gid_attr *attr, | |
dc5640f2 | 430 | unsigned long mask, bool default_gid) |
1da177e4 | 431 | { |
03db3a2d | 432 | struct ib_gid_table *table; |
598ff6ba | 433 | int ret = 0; |
03db3a2d MB |
434 | int ix; |
435 | ||
21d6454a | 436 | table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; |
03db3a2d MB |
437 | |
438 | mutex_lock(&table->lock); | |
439 | ||
dc5640f2 | 440 | ix = find_gid(table, gid, attr, default_gid, mask, NULL); |
598ff6ba PP |
441 | if (ix < 0) { |
442 | ret = -EINVAL; | |
03db3a2d | 443 | goto out_unlock; |
598ff6ba | 444 | } |
03db3a2d | 445 | |
598ff6ba PP |
446 | del_gid(ib_dev, port, table, ix); |
447 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
448 | |
449 | out_unlock: | |
450 | mutex_unlock(&table->lock); | |
598ff6ba PP |
451 | if (ret) |
452 | pr_debug("%s: can't delete gid %pI6 error=%d\n", | |
453 | __func__, gid->raw, ret); | |
454 | return ret; | |
03db3a2d MB |
455 | } |
456 | ||
22c01ee4 PP |
457 | int ib_cache_gid_del(struct ib_device *ib_dev, u8 port, |
458 | union ib_gid *gid, struct ib_gid_attr *attr) | |
459 | { | |
dc5640f2 PP |
460 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
461 | GID_ATTR_FIND_MASK_GID_TYPE | | |
462 | GID_ATTR_FIND_MASK_DEFAULT | | |
463 | GID_ATTR_FIND_MASK_NETDEV; | |
464 | ||
465 | return _ib_cache_gid_del(ib_dev, port, gid, attr, mask, false); | |
22c01ee4 PP |
466 | } |
467 | ||
03db3a2d MB |
468 | int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, |
469 | struct net_device *ndev) | |
470 | { | |
03db3a2d MB |
471 | struct ib_gid_table *table; |
472 | int ix; | |
9c584f04 | 473 | bool deleted = false; |
03db3a2d | 474 | |
21d6454a | 475 | table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; |
03db3a2d MB |
476 | |
477 | mutex_lock(&table->lock); | |
478 | ||
598ff6ba PP |
479 | for (ix = 0; ix < table->sz; ix++) { |
480 | if (table->data_vec[ix].attr.ndev == ndev) { | |
481 | del_gid(ib_dev, port, table, ix); | |
482 | deleted = true; | |
483 | } | |
484 | } | |
03db3a2d MB |
485 | |
486 | mutex_unlock(&table->lock); | |
9c584f04 MB |
487 | |
488 | if (deleted) | |
489 | dispatch_gid_change_event(ib_dev, port); | |
490 | ||
03db3a2d MB |
491 | return 0; |
492 | } | |
493 | ||
494 | static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index, | |
495 | union ib_gid *gid, struct ib_gid_attr *attr) | |
496 | { | |
03db3a2d | 497 | struct ib_gid_table *table; |
1da177e4 | 498 | |
21d6454a | 499 | table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; |
1da177e4 | 500 | |
03db3a2d MB |
501 | if (index < 0 || index >= table->sz) |
502 | return -EINVAL; | |
1da177e4 | 503 | |
9c584f04 | 504 | if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID) |
03db3a2d | 505 | return -EAGAIN; |
03db3a2d MB |
506 | |
507 | memcpy(gid, &table->data_vec[index].gid, sizeof(*gid)); | |
508 | if (attr) { | |
509 | memcpy(attr, &table->data_vec[index].attr, sizeof(*attr)); | |
510 | if (attr->ndev) | |
511 | dev_hold(attr->ndev); | |
512 | } | |
513 | ||
03db3a2d MB |
514 | return 0; |
515 | } | |
516 | ||
517 | static int _ib_cache_gid_table_find(struct ib_device *ib_dev, | |
518 | const union ib_gid *gid, | |
519 | const struct ib_gid_attr *val, | |
520 | unsigned long mask, | |
521 | u8 *port, u16 *index) | |
522 | { | |
03db3a2d MB |
523 | struct ib_gid_table *table; |
524 | u8 p; | |
525 | int local_index; | |
9c584f04 | 526 | unsigned long flags; |
03db3a2d MB |
527 | |
528 | for (p = 0; p < ib_dev->phys_port_cnt; p++) { | |
21d6454a | 529 | table = ib_dev->cache.ports[p].gid; |
9c584f04 | 530 | read_lock_irqsave(&table->rwlock, flags); |
cee3c4d0 | 531 | local_index = find_gid(table, gid, val, false, mask, NULL); |
03db3a2d MB |
532 | if (local_index >= 0) { |
533 | if (index) | |
534 | *index = local_index; | |
535 | if (port) | |
536 | *port = p + rdma_start_port(ib_dev); | |
9c584f04 | 537 | read_unlock_irqrestore(&table->rwlock, flags); |
03db3a2d | 538 | return 0; |
1da177e4 | 539 | } |
9c584f04 | 540 | read_unlock_irqrestore(&table->rwlock, flags); |
1da177e4 | 541 | } |
1da177e4 | 542 | |
03db3a2d MB |
543 | return -ENOENT; |
544 | } | |
545 | ||
546 | static int ib_cache_gid_find(struct ib_device *ib_dev, | |
547 | const union ib_gid *gid, | |
b39ffa1d | 548 | enum ib_gid_type gid_type, |
03db3a2d MB |
549 | struct net_device *ndev, u8 *port, |
550 | u16 *index) | |
551 | { | |
b39ffa1d MB |
552 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
553 | GID_ATTR_FIND_MASK_GID_TYPE; | |
554 | struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type}; | |
03db3a2d MB |
555 | |
556 | if (ndev) | |
557 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
558 | ||
559 | return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val, | |
560 | mask, port, index); | |
561 | } | |
562 | ||
6612b498 PP |
563 | /** |
564 | * ib_find_cached_gid_by_port - Returns the GID table index where a specified | |
565 | * GID value occurs. It searches for the specified GID value in the local | |
566 | * software cache. | |
567 | * @device: The device to query. | |
568 | * @gid: The GID value to search for. | |
569 | * @gid_type: The GID type to search for. | |
570 | * @port_num: The port number of the device where the GID value should be | |
571 | * searched. | |
572 | * @ndev: In RoCE, the net device of the device. Null means ignore. | |
573 | * @index: The index into the cached GID table where the GID was found. This | |
574 | * parameter may be NULL. | |
575 | */ | |
d300ec52 MB |
576 | int ib_find_cached_gid_by_port(struct ib_device *ib_dev, |
577 | const union ib_gid *gid, | |
b39ffa1d | 578 | enum ib_gid_type gid_type, |
d300ec52 MB |
579 | u8 port, struct net_device *ndev, |
580 | u16 *index) | |
03db3a2d MB |
581 | { |
582 | int local_index; | |
03db3a2d | 583 | struct ib_gid_table *table; |
b39ffa1d MB |
584 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
585 | GID_ATTR_FIND_MASK_GID_TYPE; | |
586 | struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type}; | |
9c584f04 | 587 | unsigned long flags; |
03db3a2d | 588 | |
24dc831b | 589 | if (!rdma_is_port_valid(ib_dev, port)) |
03db3a2d MB |
590 | return -ENOENT; |
591 | ||
21d6454a | 592 | table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; |
03db3a2d MB |
593 | |
594 | if (ndev) | |
595 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
596 | ||
9c584f04 | 597 | read_lock_irqsave(&table->rwlock, flags); |
cee3c4d0 | 598 | local_index = find_gid(table, gid, &val, false, mask, NULL); |
03db3a2d MB |
599 | if (local_index >= 0) { |
600 | if (index) | |
601 | *index = local_index; | |
9c584f04 | 602 | read_unlock_irqrestore(&table->rwlock, flags); |
03db3a2d MB |
603 | return 0; |
604 | } | |
605 | ||
9c584f04 | 606 | read_unlock_irqrestore(&table->rwlock, flags); |
03db3a2d MB |
607 | return -ENOENT; |
608 | } | |
d300ec52 | 609 | EXPORT_SYMBOL(ib_find_cached_gid_by_port); |
03db3a2d | 610 | |
99b27e3b | 611 | /** |
6612b498 | 612 | * ib_cache_gid_find_by_filter - Returns the GID table index where a specified |
99b27e3b MB |
613 | * GID value occurs |
614 | * @device: The device to query. | |
615 | * @gid: The GID value to search for. | |
616 | * @port_num: The port number of the device where the GID value could be | |
617 | * searched. | |
618 | * @filter: The filter function is executed on any matching GID in the table. | |
619 | * If the filter function returns true, the corresponding index is returned, | |
620 | * otherwise, we continue searching the GID table. It's guaranteed that | |
621 | * while filter is executed, ndev field is valid and the structure won't | |
622 | * change. filter is executed in an atomic context. filter must not be NULL. | |
6612b498 | 623 | * @index: The index into the cached GID table where the GID was found. This |
99b27e3b MB |
624 | * parameter may be NULL. |
625 | * | |
626 | * ib_cache_gid_find_by_filter() searches for the specified GID value | |
627 | * of which the filter function returns true in the port's GID table. | |
628 | * This function is only supported on RoCE ports. | |
629 | * | |
630 | */ | |
631 | static int ib_cache_gid_find_by_filter(struct ib_device *ib_dev, | |
632 | const union ib_gid *gid, | |
633 | u8 port, | |
634 | bool (*filter)(const union ib_gid *, | |
635 | const struct ib_gid_attr *, | |
636 | void *), | |
637 | void *context, | |
638 | u16 *index) | |
639 | { | |
99b27e3b MB |
640 | struct ib_gid_table *table; |
641 | unsigned int i; | |
9c584f04 | 642 | unsigned long flags; |
99b27e3b MB |
643 | bool found = false; |
644 | ||
99b27e3b | 645 | |
24dc831b | 646 | if (!rdma_is_port_valid(ib_dev, port) || |
99b27e3b MB |
647 | !rdma_protocol_roce(ib_dev, port)) |
648 | return -EPROTONOSUPPORT; | |
649 | ||
21d6454a | 650 | table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; |
99b27e3b | 651 | |
9c584f04 | 652 | read_lock_irqsave(&table->rwlock, flags); |
99b27e3b MB |
653 | for (i = 0; i < table->sz; i++) { |
654 | struct ib_gid_attr attr; | |
99b27e3b | 655 | |
99b27e3b | 656 | if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID) |
151ed9d7 | 657 | continue; |
99b27e3b MB |
658 | |
659 | if (memcmp(gid, &table->data_vec[i].gid, sizeof(*gid))) | |
151ed9d7 | 660 | continue; |
99b27e3b MB |
661 | |
662 | memcpy(&attr, &table->data_vec[i].attr, sizeof(attr)); | |
663 | ||
151ed9d7 | 664 | if (filter(gid, &attr, context)) { |
99b27e3b | 665 | found = true; |
151ed9d7 PP |
666 | if (index) |
667 | *index = i; | |
99b27e3b | 668 | break; |
151ed9d7 | 669 | } |
99b27e3b | 670 | } |
9c584f04 | 671 | read_unlock_irqrestore(&table->rwlock, flags); |
99b27e3b MB |
672 | |
673 | if (!found) | |
674 | return -ENOENT; | |
99b27e3b MB |
675 | return 0; |
676 | } | |
677 | ||
03db3a2d MB |
678 | static struct ib_gid_table *alloc_gid_table(int sz) |
679 | { | |
03db3a2d MB |
680 | struct ib_gid_table *table = |
681 | kzalloc(sizeof(struct ib_gid_table), GFP_KERNEL); | |
598ff6ba | 682 | int i; |
9c584f04 | 683 | |
03db3a2d MB |
684 | if (!table) |
685 | return NULL; | |
686 | ||
687 | table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL); | |
688 | if (!table->data_vec) | |
689 | goto err_free_table; | |
690 | ||
691 | mutex_init(&table->lock); | |
692 | ||
693 | table->sz = sz; | |
9c584f04 | 694 | rwlock_init(&table->rwlock); |
03db3a2d | 695 | |
598ff6ba PP |
696 | /* Mark all entries as invalid so that allocator can allocate |
697 | * one of the invalid (free) entry. | |
698 | */ | |
699 | for (i = 0; i < sz; i++) | |
700 | table->data_vec[i].props |= GID_TABLE_ENTRY_INVALID; | |
03db3a2d MB |
701 | return table; |
702 | ||
703 | err_free_table: | |
704 | kfree(table); | |
705 | return NULL; | |
706 | } | |
707 | ||
708 | static void release_gid_table(struct ib_gid_table *table) | |
709 | { | |
710 | if (table) { | |
711 | kfree(table->data_vec); | |
712 | kfree(table); | |
713 | } | |
714 | } | |
715 | ||
716 | static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port, | |
717 | struct ib_gid_table *table) | |
718 | { | |
719 | int i; | |
9c584f04 | 720 | bool deleted = false; |
03db3a2d MB |
721 | |
722 | if (!table) | |
723 | return; | |
724 | ||
598ff6ba | 725 | mutex_lock(&table->lock); |
03db3a2d MB |
726 | for (i = 0; i < table->sz; ++i) { |
727 | if (memcmp(&table->data_vec[i].gid, &zgid, | |
598ff6ba PP |
728 | sizeof(table->data_vec[i].gid))) { |
729 | del_gid(ib_dev, port, table, i); | |
730 | deleted = true; | |
731 | } | |
03db3a2d | 732 | } |
598ff6ba | 733 | mutex_unlock(&table->lock); |
9c584f04 MB |
734 | |
735 | if (deleted) | |
736 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
737 | } |
738 | ||
739 | void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port, | |
740 | struct net_device *ndev, | |
b39ffa1d | 741 | unsigned long gid_type_mask, |
03db3a2d MB |
742 | enum ib_cache_gid_default_mode mode) |
743 | { | |
dc5640f2 | 744 | union ib_gid gid = { }; |
03db3a2d MB |
745 | struct ib_gid_attr gid_attr; |
746 | struct ib_gid_table *table; | |
b39ffa1d | 747 | unsigned int gid_type; |
598ff6ba | 748 | unsigned long mask; |
03db3a2d | 749 | |
21d6454a | 750 | table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; |
03db3a2d | 751 | |
dc5640f2 PP |
752 | mask = GID_ATTR_FIND_MASK_GID_TYPE | |
753 | GID_ATTR_FIND_MASK_DEFAULT | | |
754 | GID_ATTR_FIND_MASK_NETDEV; | |
03db3a2d MB |
755 | memset(&gid_attr, 0, sizeof(gid_attr)); |
756 | gid_attr.ndev = ndev; | |
757 | ||
b39ffa1d | 758 | for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) { |
b39ffa1d MB |
759 | if (1UL << gid_type & ~gid_type_mask) |
760 | continue; | |
761 | ||
762 | gid_attr.gid_type = gid_type; | |
763 | ||
b39ffa1d | 764 | if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) { |
dc5640f2 | 765 | make_default_gid(ndev, &gid); |
598ff6ba PP |
766 | __ib_cache_gid_add(ib_dev, port, &gid, |
767 | &gid_attr, mask, true); | |
768 | } else if (mode == IB_CACHE_GID_DEFAULT_MODE_DELETE) { | |
dc5640f2 PP |
769 | _ib_cache_gid_del(ib_dev, port, &gid, |
770 | &gid_attr, mask, true); | |
9c584f04 | 771 | } |
b39ffa1d | 772 | } |
03db3a2d MB |
773 | } |
774 | ||
775 | static int gid_table_reserve_default(struct ib_device *ib_dev, u8 port, | |
776 | struct ib_gid_table *table) | |
777 | { | |
b39ffa1d MB |
778 | unsigned int i; |
779 | unsigned long roce_gid_type_mask; | |
780 | unsigned int num_default_gids; | |
781 | unsigned int current_gid = 0; | |
782 | ||
783 | roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port); | |
784 | num_default_gids = hweight_long(roce_gid_type_mask); | |
785 | for (i = 0; i < num_default_gids && i < table->sz; i++) { | |
786 | struct ib_gid_table_entry *entry = | |
787 | &table->data_vec[i]; | |
03db3a2d MB |
788 | |
789 | entry->props |= GID_TABLE_ENTRY_DEFAULT; | |
b39ffa1d MB |
790 | current_gid = find_next_bit(&roce_gid_type_mask, |
791 | BITS_PER_LONG, | |
792 | current_gid); | |
793 | entry->attr.gid_type = current_gid++; | |
03db3a2d MB |
794 | } |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | static int _gid_table_setup_one(struct ib_device *ib_dev) | |
800 | { | |
801 | u8 port; | |
21d6454a | 802 | struct ib_gid_table *table; |
03db3a2d MB |
803 | int err = 0; |
804 | ||
03db3a2d MB |
805 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { |
806 | u8 rdma_port = port + rdma_start_port(ib_dev); | |
807 | ||
21d6454a | 808 | table = |
03db3a2d MB |
809 | alloc_gid_table( |
810 | ib_dev->port_immutable[rdma_port].gid_tbl_len); | |
21d6454a | 811 | if (!table) { |
03db3a2d MB |
812 | err = -ENOMEM; |
813 | goto rollback_table_setup; | |
814 | } | |
815 | ||
816 | err = gid_table_reserve_default(ib_dev, | |
817 | port + rdma_start_port(ib_dev), | |
21d6454a | 818 | table); |
03db3a2d MB |
819 | if (err) |
820 | goto rollback_table_setup; | |
21d6454a | 821 | ib_dev->cache.ports[port].gid = table; |
03db3a2d MB |
822 | } |
823 | ||
03db3a2d MB |
824 | return 0; |
825 | ||
826 | rollback_table_setup: | |
827 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { | |
21d6454a JW |
828 | table = ib_dev->cache.ports[port].gid; |
829 | ||
03db3a2d | 830 | cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev), |
21d6454a JW |
831 | table); |
832 | release_gid_table(table); | |
03db3a2d MB |
833 | } |
834 | ||
03db3a2d MB |
835 | return err; |
836 | } | |
837 | ||
838 | static void gid_table_release_one(struct ib_device *ib_dev) | |
839 | { | |
21d6454a | 840 | struct ib_gid_table *table; |
03db3a2d MB |
841 | u8 port; |
842 | ||
21d6454a JW |
843 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { |
844 | table = ib_dev->cache.ports[port].gid; | |
845 | release_gid_table(table); | |
846 | ib_dev->cache.ports[port].gid = NULL; | |
847 | } | |
03db3a2d MB |
848 | } |
849 | ||
850 | static void gid_table_cleanup_one(struct ib_device *ib_dev) | |
851 | { | |
21d6454a | 852 | struct ib_gid_table *table; |
03db3a2d MB |
853 | u8 port; |
854 | ||
21d6454a JW |
855 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { |
856 | table = ib_dev->cache.ports[port].gid; | |
03db3a2d | 857 | cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev), |
21d6454a JW |
858 | table); |
859 | } | |
03db3a2d MB |
860 | } |
861 | ||
862 | static int gid_table_setup_one(struct ib_device *ib_dev) | |
863 | { | |
864 | int err; | |
865 | ||
866 | err = _gid_table_setup_one(ib_dev); | |
867 | ||
868 | if (err) | |
869 | return err; | |
870 | ||
32f69e4b | 871 | rdma_roce_rescan_device(ib_dev); |
03db3a2d MB |
872 | |
873 | return err; | |
874 | } | |
875 | ||
876 | int ib_get_cached_gid(struct ib_device *device, | |
877 | u8 port_num, | |
878 | int index, | |
55ee3ab2 MB |
879 | union ib_gid *gid, |
880 | struct ib_gid_attr *gid_attr) | |
03db3a2d | 881 | { |
9c584f04 MB |
882 | int res; |
883 | unsigned long flags; | |
21d6454a | 884 | struct ib_gid_table *table; |
9c584f04 | 885 | |
24dc831b | 886 | if (!rdma_is_port_valid(device, port_num)) |
03db3a2d MB |
887 | return -EINVAL; |
888 | ||
21d6454a | 889 | table = device->cache.ports[port_num - rdma_start_port(device)].gid; |
9c584f04 MB |
890 | read_lock_irqsave(&table->rwlock, flags); |
891 | res = __ib_cache_gid_get(device, port_num, index, gid, gid_attr); | |
892 | read_unlock_irqrestore(&table->rwlock, flags); | |
893 | ||
894 | return res; | |
03db3a2d MB |
895 | } |
896 | EXPORT_SYMBOL(ib_get_cached_gid); | |
897 | ||
6612b498 PP |
898 | /** |
899 | * ib_find_cached_gid - Returns the port number and GID table index where | |
900 | * a specified GID value occurs. | |
901 | * @device: The device to query. | |
902 | * @gid: The GID value to search for. | |
903 | * @gid_type: The GID type to search for. | |
904 | * @ndev: In RoCE, the net device of the device. NULL means ignore. | |
905 | * @port_num: The port number of the device where the GID value was found. | |
906 | * @index: The index into the cached GID table where the GID was found. This | |
907 | * parameter may be NULL. | |
908 | * | |
909 | * ib_find_cached_gid() searches for the specified GID value in | |
910 | * the local software cache. | |
911 | */ | |
03db3a2d MB |
912 | int ib_find_cached_gid(struct ib_device *device, |
913 | const union ib_gid *gid, | |
b39ffa1d | 914 | enum ib_gid_type gid_type, |
55ee3ab2 | 915 | struct net_device *ndev, |
03db3a2d MB |
916 | u8 *port_num, |
917 | u16 *index) | |
918 | { | |
b39ffa1d | 919 | return ib_cache_gid_find(device, gid, gid_type, ndev, port_num, index); |
1da177e4 LT |
920 | } |
921 | EXPORT_SYMBOL(ib_find_cached_gid); | |
922 | ||
99b27e3b MB |
923 | int ib_find_gid_by_filter(struct ib_device *device, |
924 | const union ib_gid *gid, | |
925 | u8 port_num, | |
926 | bool (*filter)(const union ib_gid *gid, | |
927 | const struct ib_gid_attr *, | |
928 | void *), | |
929 | void *context, u16 *index) | |
930 | { | |
931 | /* Only RoCE GID table supports filter function */ | |
4ab7cb4b | 932 | if (!rdma_protocol_roce(device, port_num) && filter) |
99b27e3b MB |
933 | return -EPROTONOSUPPORT; |
934 | ||
935 | return ib_cache_gid_find_by_filter(device, gid, | |
936 | port_num, filter, | |
937 | context, index); | |
938 | } | |
99b27e3b | 939 | |
1da177e4 LT |
940 | int ib_get_cached_pkey(struct ib_device *device, |
941 | u8 port_num, | |
942 | int index, | |
943 | u16 *pkey) | |
944 | { | |
945 | struct ib_pkey_cache *cache; | |
946 | unsigned long flags; | |
947 | int ret = 0; | |
948 | ||
24dc831b | 949 | if (!rdma_is_port_valid(device, port_num)) |
1da177e4 LT |
950 | return -EINVAL; |
951 | ||
952 | read_lock_irqsave(&device->cache.lock, flags); | |
953 | ||
21d6454a | 954 | cache = device->cache.ports[port_num - rdma_start_port(device)].pkey; |
1da177e4 LT |
955 | |
956 | if (index < 0 || index >= cache->table_len) | |
957 | ret = -EINVAL; | |
958 | else | |
959 | *pkey = cache->table[index]; | |
960 | ||
961 | read_unlock_irqrestore(&device->cache.lock, flags); | |
962 | ||
963 | return ret; | |
964 | } | |
965 | EXPORT_SYMBOL(ib_get_cached_pkey); | |
966 | ||
883c71fe DJ |
967 | int ib_get_cached_subnet_prefix(struct ib_device *device, |
968 | u8 port_num, | |
969 | u64 *sn_pfx) | |
970 | { | |
971 | unsigned long flags; | |
972 | int p; | |
973 | ||
6d5b2047 | 974 | if (!rdma_is_port_valid(device, port_num)) |
883c71fe DJ |
975 | return -EINVAL; |
976 | ||
977 | p = port_num - rdma_start_port(device); | |
978 | read_lock_irqsave(&device->cache.lock, flags); | |
979 | *sn_pfx = device->cache.ports[p].subnet_prefix; | |
980 | read_unlock_irqrestore(&device->cache.lock, flags); | |
981 | ||
982 | return 0; | |
983 | } | |
984 | EXPORT_SYMBOL(ib_get_cached_subnet_prefix); | |
985 | ||
1da177e4 LT |
986 | int ib_find_cached_pkey(struct ib_device *device, |
987 | u8 port_num, | |
988 | u16 pkey, | |
989 | u16 *index) | |
990 | { | |
991 | struct ib_pkey_cache *cache; | |
992 | unsigned long flags; | |
993 | int i; | |
994 | int ret = -ENOENT; | |
ff7166c4 | 995 | int partial_ix = -1; |
1da177e4 | 996 | |
24dc831b | 997 | if (!rdma_is_port_valid(device, port_num)) |
1da177e4 LT |
998 | return -EINVAL; |
999 | ||
1000 | read_lock_irqsave(&device->cache.lock, flags); | |
1001 | ||
21d6454a | 1002 | cache = device->cache.ports[port_num - rdma_start_port(device)].pkey; |
1da177e4 LT |
1003 | |
1004 | *index = -1; | |
1005 | ||
1006 | for (i = 0; i < cache->table_len; ++i) | |
1007 | if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) { | |
ff7166c4 JM |
1008 | if (cache->table[i] & 0x8000) { |
1009 | *index = i; | |
1010 | ret = 0; | |
1011 | break; | |
1012 | } else | |
1013 | partial_ix = i; | |
1da177e4 LT |
1014 | } |
1015 | ||
ff7166c4 JM |
1016 | if (ret && partial_ix >= 0) { |
1017 | *index = partial_ix; | |
1018 | ret = 0; | |
1019 | } | |
1020 | ||
1da177e4 LT |
1021 | read_unlock_irqrestore(&device->cache.lock, flags); |
1022 | ||
1023 | return ret; | |
1024 | } | |
1025 | EXPORT_SYMBOL(ib_find_cached_pkey); | |
1026 | ||
73aaa741 JM |
1027 | int ib_find_exact_cached_pkey(struct ib_device *device, |
1028 | u8 port_num, | |
1029 | u16 pkey, | |
1030 | u16 *index) | |
1031 | { | |
1032 | struct ib_pkey_cache *cache; | |
1033 | unsigned long flags; | |
1034 | int i; | |
1035 | int ret = -ENOENT; | |
1036 | ||
24dc831b | 1037 | if (!rdma_is_port_valid(device, port_num)) |
73aaa741 JM |
1038 | return -EINVAL; |
1039 | ||
1040 | read_lock_irqsave(&device->cache.lock, flags); | |
1041 | ||
21d6454a | 1042 | cache = device->cache.ports[port_num - rdma_start_port(device)].pkey; |
73aaa741 JM |
1043 | |
1044 | *index = -1; | |
1045 | ||
1046 | for (i = 0; i < cache->table_len; ++i) | |
1047 | if (cache->table[i] == pkey) { | |
1048 | *index = i; | |
1049 | ret = 0; | |
1050 | break; | |
1051 | } | |
1052 | ||
1053 | read_unlock_irqrestore(&device->cache.lock, flags); | |
1054 | ||
1055 | return ret; | |
1056 | } | |
1057 | EXPORT_SYMBOL(ib_find_exact_cached_pkey); | |
1058 | ||
6fb9cdbf JM |
1059 | int ib_get_cached_lmc(struct ib_device *device, |
1060 | u8 port_num, | |
1061 | u8 *lmc) | |
1062 | { | |
1063 | unsigned long flags; | |
1064 | int ret = 0; | |
1065 | ||
24dc831b | 1066 | if (!rdma_is_port_valid(device, port_num)) |
6fb9cdbf JM |
1067 | return -EINVAL; |
1068 | ||
1069 | read_lock_irqsave(&device->cache.lock, flags); | |
21d6454a | 1070 | *lmc = device->cache.ports[port_num - rdma_start_port(device)].lmc; |
6fb9cdbf JM |
1071 | read_unlock_irqrestore(&device->cache.lock, flags); |
1072 | ||
1073 | return ret; | |
1074 | } | |
1075 | EXPORT_SYMBOL(ib_get_cached_lmc); | |
1076 | ||
9e2c3f1c JW |
1077 | int ib_get_cached_port_state(struct ib_device *device, |
1078 | u8 port_num, | |
1079 | enum ib_port_state *port_state) | |
1080 | { | |
1081 | unsigned long flags; | |
1082 | int ret = 0; | |
1083 | ||
6d5b2047 | 1084 | if (!rdma_is_port_valid(device, port_num)) |
9e2c3f1c JW |
1085 | return -EINVAL; |
1086 | ||
1087 | read_lock_irqsave(&device->cache.lock, flags); | |
21d6454a JW |
1088 | *port_state = device->cache.ports[port_num |
1089 | - rdma_start_port(device)].port_state; | |
9e2c3f1c JW |
1090 | read_unlock_irqrestore(&device->cache.lock, flags); |
1091 | ||
1092 | return ret; | |
1093 | } | |
1094 | EXPORT_SYMBOL(ib_get_cached_port_state); | |
1095 | ||
598ff6ba PP |
1096 | static int config_non_roce_gid_cache(struct ib_device *device, |
1097 | u8 port, int gid_tbl_len) | |
1098 | { | |
1099 | struct ib_gid_attr gid_attr = {}; | |
1100 | struct ib_gid_table *table; | |
1101 | union ib_gid gid; | |
1102 | int ret = 0; | |
1103 | int i; | |
1104 | ||
1105 | gid_attr.device = device; | |
1106 | gid_attr.port_num = port; | |
1107 | table = device->cache.ports[port - rdma_start_port(device)].gid; | |
1108 | ||
1109 | mutex_lock(&table->lock); | |
1110 | for (i = 0; i < gid_tbl_len; ++i) { | |
1111 | if (!device->query_gid) | |
1112 | continue; | |
1113 | ret = device->query_gid(device, port, i, &gid); | |
1114 | if (ret) { | |
1115 | pr_warn("query_gid failed (%d) for %s (index %d)\n", | |
1116 | ret, device->name, i); | |
1117 | goto err; | |
1118 | } | |
1119 | gid_attr.index = i; | |
1120 | add_modify_gid(table, &gid, &gid_attr); | |
1121 | } | |
1122 | err: | |
1123 | mutex_unlock(&table->lock); | |
1124 | return ret; | |
1125 | } | |
1126 | ||
1da177e4 | 1127 | static void ib_cache_update(struct ib_device *device, |
d291f1a6 DJ |
1128 | u8 port, |
1129 | bool enforce_security) | |
1da177e4 LT |
1130 | { |
1131 | struct ib_port_attr *tprops = NULL; | |
1132 | struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache; | |
1da177e4 LT |
1133 | int i; |
1134 | int ret; | |
03db3a2d | 1135 | struct ib_gid_table *table; |
03db3a2d | 1136 | |
24dc831b | 1137 | if (!rdma_is_port_valid(device, port)) |
03db3a2d MB |
1138 | return; |
1139 | ||
21d6454a | 1140 | table = device->cache.ports[port - rdma_start_port(device)].gid; |
1da177e4 LT |
1141 | |
1142 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); | |
1143 | if (!tprops) | |
1144 | return; | |
1145 | ||
1146 | ret = ib_query_port(device, port, tprops); | |
1147 | if (ret) { | |
aba25a3e PP |
1148 | pr_warn("ib_query_port failed (%d) for %s\n", |
1149 | ret, device->name); | |
1da177e4 LT |
1150 | goto err; |
1151 | } | |
1152 | ||
598ff6ba PP |
1153 | if (!rdma_protocol_roce(device, port)) { |
1154 | ret = config_non_roce_gid_cache(device, port, | |
1155 | tprops->gid_tbl_len); | |
1156 | if (ret) | |
1157 | goto err; | |
1158 | } | |
1159 | ||
1da177e4 LT |
1160 | pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len * |
1161 | sizeof *pkey_cache->table, GFP_KERNEL); | |
1162 | if (!pkey_cache) | |
1163 | goto err; | |
1164 | ||
1165 | pkey_cache->table_len = tprops->pkey_tbl_len; | |
1166 | ||
1da177e4 LT |
1167 | for (i = 0; i < pkey_cache->table_len; ++i) { |
1168 | ret = ib_query_pkey(device, port, i, pkey_cache->table + i); | |
1169 | if (ret) { | |
aba25a3e PP |
1170 | pr_warn("ib_query_pkey failed (%d) for %s (index %d)\n", |
1171 | ret, device->name, i); | |
1da177e4 LT |
1172 | goto err; |
1173 | } | |
1174 | } | |
1175 | ||
1da177e4 LT |
1176 | write_lock_irq(&device->cache.lock); |
1177 | ||
21d6454a JW |
1178 | old_pkey_cache = device->cache.ports[port - |
1179 | rdma_start_port(device)].pkey; | |
1da177e4 | 1180 | |
21d6454a | 1181 | device->cache.ports[port - rdma_start_port(device)].pkey = pkey_cache; |
21d6454a JW |
1182 | device->cache.ports[port - rdma_start_port(device)].lmc = tprops->lmc; |
1183 | device->cache.ports[port - rdma_start_port(device)].port_state = | |
aaaca121 | 1184 | tprops->state; |
6fb9cdbf | 1185 | |
883c71fe DJ |
1186 | device->cache.ports[port - rdma_start_port(device)].subnet_prefix = |
1187 | tprops->subnet_prefix; | |
1da177e4 LT |
1188 | write_unlock_irq(&device->cache.lock); |
1189 | ||
d291f1a6 DJ |
1190 | if (enforce_security) |
1191 | ib_security_cache_change(device, | |
1192 | port, | |
1193 | tprops->subnet_prefix); | |
1194 | ||
1da177e4 | 1195 | kfree(old_pkey_cache); |
1da177e4 LT |
1196 | kfree(tprops); |
1197 | return; | |
1198 | ||
1199 | err: | |
1200 | kfree(pkey_cache); | |
1da177e4 LT |
1201 | kfree(tprops); |
1202 | } | |
1203 | ||
c4028958 | 1204 | static void ib_cache_task(struct work_struct *_work) |
1da177e4 | 1205 | { |
c4028958 DH |
1206 | struct ib_update_work *work = |
1207 | container_of(_work, struct ib_update_work, work); | |
1da177e4 | 1208 | |
d291f1a6 DJ |
1209 | ib_cache_update(work->device, |
1210 | work->port_num, | |
1211 | work->enforce_security); | |
1da177e4 LT |
1212 | kfree(work); |
1213 | } | |
1214 | ||
1215 | static void ib_cache_event(struct ib_event_handler *handler, | |
1216 | struct ib_event *event) | |
1217 | { | |
1218 | struct ib_update_work *work; | |
1219 | ||
1220 | if (event->event == IB_EVENT_PORT_ERR || | |
1221 | event->event == IB_EVENT_PORT_ACTIVE || | |
1222 | event->event == IB_EVENT_LID_CHANGE || | |
1223 | event->event == IB_EVENT_PKEY_CHANGE || | |
acaea9ee | 1224 | event->event == IB_EVENT_SM_CHANGE || |
761d90ed OG |
1225 | event->event == IB_EVENT_CLIENT_REREGISTER || |
1226 | event->event == IB_EVENT_GID_CHANGE) { | |
1da177e4 LT |
1227 | work = kmalloc(sizeof *work, GFP_ATOMIC); |
1228 | if (work) { | |
c4028958 | 1229 | INIT_WORK(&work->work, ib_cache_task); |
1da177e4 LT |
1230 | work->device = event->device; |
1231 | work->port_num = event->element.port_num; | |
d291f1a6 DJ |
1232 | if (event->event == IB_EVENT_PKEY_CHANGE || |
1233 | event->event == IB_EVENT_GID_CHANGE) | |
1234 | work->enforce_security = true; | |
1235 | else | |
1236 | work->enforce_security = false; | |
1237 | ||
f0626710 | 1238 | queue_work(ib_wq, &work->work); |
1da177e4 LT |
1239 | } |
1240 | } | |
1241 | } | |
1242 | ||
03db3a2d | 1243 | int ib_cache_setup_one(struct ib_device *device) |
1da177e4 LT |
1244 | { |
1245 | int p; | |
03db3a2d | 1246 | int err; |
1da177e4 LT |
1247 | |
1248 | rwlock_init(&device->cache.lock); | |
1249 | ||
21d6454a JW |
1250 | device->cache.ports = |
1251 | kzalloc(sizeof(*device->cache.ports) * | |
0cf18d77 | 1252 | (rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL); |
dcc9881e LR |
1253 | if (!device->cache.ports) |
1254 | return -ENOMEM; | |
1da177e4 | 1255 | |
03db3a2d | 1256 | err = gid_table_setup_one(device); |
dcc9881e LR |
1257 | if (err) { |
1258 | kfree(device->cache.ports); | |
1259 | device->cache.ports = NULL; | |
1260 | return err; | |
1261 | } | |
03db3a2d | 1262 | |
55aeed06 | 1263 | for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p) |
d291f1a6 | 1264 | ib_cache_update(device, p + rdma_start_port(device), true); |
1da177e4 LT |
1265 | |
1266 | INIT_IB_EVENT_HANDLER(&device->cache.event_handler, | |
1267 | device, ib_cache_event); | |
dcc9881e | 1268 | ib_register_event_handler(&device->cache.event_handler); |
03db3a2d | 1269 | return 0; |
1da177e4 LT |
1270 | } |
1271 | ||
03db3a2d | 1272 | void ib_cache_release_one(struct ib_device *device) |
1da177e4 LT |
1273 | { |
1274 | int p; | |
1275 | ||
03db3a2d MB |
1276 | /* |
1277 | * The release function frees all the cache elements. | |
1278 | * This function should be called as part of freeing | |
1279 | * all the device's resources when the cache could no | |
1280 | * longer be accessed. | |
1281 | */ | |
21d6454a JW |
1282 | for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p) |
1283 | kfree(device->cache.ports[p].pkey); | |
03db3a2d MB |
1284 | |
1285 | gid_table_release_one(device); | |
21d6454a | 1286 | kfree(device->cache.ports); |
1da177e4 LT |
1287 | } |
1288 | ||
03db3a2d MB |
1289 | void ib_cache_cleanup_one(struct ib_device *device) |
1290 | { | |
1291 | /* The cleanup function unregisters the event handler, | |
1292 | * waits for all in-progress workqueue elements and cleans | |
1293 | * up the GID cache. This function should be called after | |
1294 | * the device was removed from the devices list and all | |
1295 | * clients were removed, so the cache exists but is | |
1296 | * non-functional and shouldn't be updated anymore. | |
1297 | */ | |
1298 | ib_unregister_event_handler(&device->cache.event_handler); | |
1299 | flush_workqueue(ib_wq); | |
1300 | gid_table_cleanup_one(device); | |
1301 | } | |
1da177e4 | 1302 | |
03db3a2d | 1303 | void __init ib_cache_setup(void) |
1da177e4 | 1304 | { |
03db3a2d | 1305 | roce_gid_mgmt_init(); |
1da177e4 LT |
1306 | } |
1307 | ||
1308 | void __exit ib_cache_cleanup(void) | |
1309 | { | |
03db3a2d | 1310 | roce_gid_mgmt_cleanup(); |
1da177e4 | 1311 | } |