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; | |
56 | }; | |
57 | ||
e26be1bf MS |
58 | union ib_gid zgid; |
59 | EXPORT_SYMBOL(zgid); | |
03db3a2d MB |
60 | |
61 | static const struct ib_gid_attr zattr; | |
62 | ||
63 | enum gid_attr_find_mask { | |
64 | GID_ATTR_FIND_MASK_GID = 1UL << 0, | |
65 | GID_ATTR_FIND_MASK_NETDEV = 1UL << 1, | |
66 | GID_ATTR_FIND_MASK_DEFAULT = 1UL << 2, | |
b39ffa1d | 67 | GID_ATTR_FIND_MASK_GID_TYPE = 1UL << 3, |
03db3a2d MB |
68 | }; |
69 | ||
70 | enum gid_table_entry_props { | |
71 | GID_TABLE_ENTRY_INVALID = 1UL << 0, | |
72 | GID_TABLE_ENTRY_DEFAULT = 1UL << 1, | |
73 | }; | |
74 | ||
75 | enum gid_table_write_action { | |
76 | GID_TABLE_WRITE_ACTION_ADD, | |
77 | GID_TABLE_WRITE_ACTION_DEL, | |
78 | /* MODIFY only updates the GID table. Currently only used by | |
79 | * ib_cache_update. | |
80 | */ | |
81 | GID_TABLE_WRITE_ACTION_MODIFY | |
82 | }; | |
83 | ||
84 | struct ib_gid_table_entry { | |
03db3a2d MB |
85 | unsigned long props; |
86 | union ib_gid gid; | |
87 | struct ib_gid_attr attr; | |
88 | void *context; | |
89 | }; | |
90 | ||
91 | struct ib_gid_table { | |
92 | int sz; | |
93 | /* In RoCE, adding a GID to the table requires: | |
94 | * (a) Find if this GID is already exists. | |
95 | * (b) Find a free space. | |
96 | * (c) Write the new GID | |
97 | * | |
98 | * Delete requires different set of operations: | |
99 | * (a) Find the GID | |
100 | * (b) Delete it. | |
101 | * | |
102 | * Add/delete should be carried out atomically. | |
103 | * This is done by locking this mutex from multiple | |
104 | * writers. We don't need this lock for IB, as the MAD | |
105 | * layer replaces all entries. All data_vec entries | |
106 | * are locked by this lock. | |
107 | **/ | |
108 | struct mutex lock; | |
9c584f04 MB |
109 | /* This lock protects the table entries from being |
110 | * read and written simultaneously. | |
111 | */ | |
112 | rwlock_t rwlock; | |
03db3a2d MB |
113 | struct ib_gid_table_entry *data_vec; |
114 | }; | |
115 | ||
f3906bd3 MB |
116 | static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port) |
117 | { | |
118 | if (rdma_cap_roce_gid_table(ib_dev, port)) { | |
119 | struct ib_event event; | |
120 | ||
121 | event.device = ib_dev; | |
122 | event.element.port_num = port; | |
123 | event.event = IB_EVENT_GID_CHANGE; | |
124 | ||
125 | ib_dispatch_event(&event); | |
126 | } | |
127 | } | |
128 | ||
b39ffa1d MB |
129 | static const char * const gid_type_str[] = { |
130 | [IB_GID_TYPE_IB] = "IB/RoCE v1", | |
7766a99f | 131 | [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2", |
b39ffa1d MB |
132 | }; |
133 | ||
134 | const char *ib_cache_gid_type_str(enum ib_gid_type gid_type) | |
135 | { | |
136 | if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type]) | |
137 | return gid_type_str[gid_type]; | |
138 | ||
139 | return "Invalid GID type"; | |
140 | } | |
141 | EXPORT_SYMBOL(ib_cache_gid_type_str); | |
142 | ||
045959db MB |
143 | int ib_cache_gid_parse_type_str(const char *buf) |
144 | { | |
145 | unsigned int i; | |
146 | size_t len; | |
147 | int err = -EINVAL; | |
148 | ||
149 | len = strlen(buf); | |
150 | if (len == 0) | |
151 | return -EINVAL; | |
152 | ||
153 | if (buf[len - 1] == '\n') | |
154 | len--; | |
155 | ||
156 | for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i) | |
157 | if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) && | |
158 | len == strlen(gid_type_str[i])) { | |
159 | err = i; | |
160 | break; | |
161 | } | |
162 | ||
163 | return err; | |
164 | } | |
165 | EXPORT_SYMBOL(ib_cache_gid_parse_type_str); | |
166 | ||
9c584f04 MB |
167 | /* This function expects that rwlock will be write locked in all |
168 | * scenarios and that lock will be locked in sleep-able (RoCE) | |
169 | * scenarios. | |
170 | */ | |
03db3a2d MB |
171 | static int write_gid(struct ib_device *ib_dev, u8 port, |
172 | struct ib_gid_table *table, int ix, | |
173 | const union ib_gid *gid, | |
174 | const struct ib_gid_attr *attr, | |
175 | enum gid_table_write_action action, | |
176 | bool default_gid) | |
2e2cdace | 177 | __releases(&table->rwlock) __acquires(&table->rwlock) |
1da177e4 | 178 | { |
03db3a2d MB |
179 | int ret = 0; |
180 | struct net_device *old_net_dev; | |
03db3a2d MB |
181 | |
182 | /* in rdma_cap_roce_gid_table, this funciton should be protected by a | |
183 | * sleep-able lock. | |
184 | */ | |
03db3a2d MB |
185 | |
186 | if (rdma_cap_roce_gid_table(ib_dev, port)) { | |
187 | table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID; | |
9c584f04 | 188 | write_unlock_irq(&table->rwlock); |
03db3a2d MB |
189 | /* GID_TABLE_WRITE_ACTION_MODIFY currently isn't supported by |
190 | * RoCE providers and thus only updates the cache. | |
191 | */ | |
192 | if (action == GID_TABLE_WRITE_ACTION_ADD) | |
193 | ret = ib_dev->add_gid(ib_dev, port, ix, gid, attr, | |
194 | &table->data_vec[ix].context); | |
195 | else if (action == GID_TABLE_WRITE_ACTION_DEL) | |
196 | ret = ib_dev->del_gid(ib_dev, port, ix, | |
197 | &table->data_vec[ix].context); | |
9c584f04 | 198 | write_lock_irq(&table->rwlock); |
03db3a2d MB |
199 | } |
200 | ||
201 | old_net_dev = table->data_vec[ix].attr.ndev; | |
202 | if (old_net_dev && old_net_dev != attr->ndev) | |
203 | dev_put(old_net_dev); | |
204 | /* if modify_gid failed, just delete the old gid */ | |
205 | if (ret || action == GID_TABLE_WRITE_ACTION_DEL) { | |
206 | gid = &zgid; | |
207 | attr = &zattr; | |
208 | table->data_vec[ix].context = NULL; | |
209 | } | |
210 | if (default_gid) | |
211 | table->data_vec[ix].props |= GID_TABLE_ENTRY_DEFAULT; | |
212 | memcpy(&table->data_vec[ix].gid, gid, sizeof(*gid)); | |
213 | memcpy(&table->data_vec[ix].attr, attr, sizeof(*attr)); | |
214 | if (table->data_vec[ix].attr.ndev && | |
215 | table->data_vec[ix].attr.ndev != old_net_dev) | |
216 | dev_hold(table->data_vec[ix].attr.ndev); | |
217 | ||
218 | table->data_vec[ix].props &= ~GID_TABLE_ENTRY_INVALID; | |
219 | ||
03db3a2d MB |
220 | return ret; |
221 | } | |
222 | ||
223 | static int add_gid(struct ib_device *ib_dev, u8 port, | |
224 | struct ib_gid_table *table, int ix, | |
225 | const union ib_gid *gid, | |
226 | const struct ib_gid_attr *attr, | |
227 | bool default_gid) { | |
228 | return write_gid(ib_dev, port, table, ix, gid, attr, | |
229 | GID_TABLE_WRITE_ACTION_ADD, default_gid); | |
230 | } | |
231 | ||
232 | static int modify_gid(struct ib_device *ib_dev, u8 port, | |
233 | struct ib_gid_table *table, int ix, | |
234 | const union ib_gid *gid, | |
235 | const struct ib_gid_attr *attr, | |
236 | bool default_gid) { | |
237 | return write_gid(ib_dev, port, table, ix, gid, attr, | |
238 | GID_TABLE_WRITE_ACTION_MODIFY, default_gid); | |
239 | } | |
240 | ||
241 | static int del_gid(struct ib_device *ib_dev, u8 port, | |
242 | struct ib_gid_table *table, int ix, | |
243 | bool default_gid) { | |
244 | return write_gid(ib_dev, port, table, ix, &zgid, &zattr, | |
245 | GID_TABLE_WRITE_ACTION_DEL, default_gid); | |
246 | } | |
247 | ||
9c584f04 | 248 | /* rwlock should be read locked */ |
03db3a2d MB |
249 | static int find_gid(struct ib_gid_table *table, const union ib_gid *gid, |
250 | const struct ib_gid_attr *val, bool default_gid, | |
cee3c4d0 | 251 | unsigned long mask, int *pempty) |
03db3a2d | 252 | { |
cee3c4d0 MB |
253 | int i = 0; |
254 | int found = -1; | |
255 | int empty = pempty ? -1 : 0; | |
03db3a2d | 256 | |
cee3c4d0 MB |
257 | while (i < table->sz && (found < 0 || empty < 0)) { |
258 | struct ib_gid_table_entry *data = &table->data_vec[i]; | |
259 | struct ib_gid_attr *attr = &data->attr; | |
260 | int curr_index = i; | |
03db3a2d | 261 | |
cee3c4d0 | 262 | i++; |
03db3a2d | 263 | |
cee3c4d0 MB |
264 | if (data->props & GID_TABLE_ENTRY_INVALID) |
265 | continue; | |
266 | ||
267 | if (empty < 0) | |
268 | if (!memcmp(&data->gid, &zgid, sizeof(*gid)) && | |
269 | !memcmp(attr, &zattr, sizeof(*attr)) && | |
270 | !data->props) | |
271 | empty = curr_index; | |
272 | ||
273 | if (found >= 0) | |
9c584f04 | 274 | continue; |
03db3a2d | 275 | |
b39ffa1d MB |
276 | if (mask & GID_ATTR_FIND_MASK_GID_TYPE && |
277 | attr->gid_type != val->gid_type) | |
278 | continue; | |
279 | ||
03db3a2d | 280 | if (mask & GID_ATTR_FIND_MASK_GID && |
cee3c4d0 | 281 | memcmp(gid, &data->gid, sizeof(*gid))) |
9c584f04 | 282 | continue; |
03db3a2d MB |
283 | |
284 | if (mask & GID_ATTR_FIND_MASK_NETDEV && | |
285 | attr->ndev != val->ndev) | |
9c584f04 | 286 | continue; |
03db3a2d MB |
287 | |
288 | if (mask & GID_ATTR_FIND_MASK_DEFAULT && | |
cee3c4d0 | 289 | !!(data->props & GID_TABLE_ENTRY_DEFAULT) != |
03db3a2d | 290 | default_gid) |
9c584f04 | 291 | continue; |
03db3a2d | 292 | |
cee3c4d0 | 293 | found = curr_index; |
03db3a2d MB |
294 | } |
295 | ||
cee3c4d0 MB |
296 | if (pempty) |
297 | *pempty = empty; | |
298 | ||
299 | return found; | |
03db3a2d MB |
300 | } |
301 | ||
302 | static void make_default_gid(struct net_device *dev, union ib_gid *gid) | |
303 | { | |
304 | gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); | |
305 | addrconf_ifid_eui48(&gid->raw[8], dev); | |
306 | } | |
307 | ||
308 | int ib_cache_gid_add(struct ib_device *ib_dev, u8 port, | |
309 | union ib_gid *gid, struct ib_gid_attr *attr) | |
310 | { | |
311 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
312 | struct ib_gid_table *table; | |
313 | int ix; | |
1da177e4 | 314 | int ret = 0; |
03db3a2d | 315 | struct net_device *idev; |
cee3c4d0 | 316 | int empty; |
1da177e4 | 317 | |
03db3a2d MB |
318 | table = ports_table[port - rdma_start_port(ib_dev)]; |
319 | ||
320 | if (!memcmp(gid, &zgid, sizeof(*gid))) | |
1da177e4 LT |
321 | return -EINVAL; |
322 | ||
03db3a2d MB |
323 | if (ib_dev->get_netdev) { |
324 | idev = ib_dev->get_netdev(ib_dev, port); | |
325 | if (idev && attr->ndev != idev) { | |
326 | union ib_gid default_gid; | |
1da177e4 | 327 | |
03db3a2d MB |
328 | /* Adding default GIDs in not permitted */ |
329 | make_default_gid(idev, &default_gid); | |
330 | if (!memcmp(gid, &default_gid, sizeof(*gid))) { | |
331 | dev_put(idev); | |
332 | return -EPERM; | |
333 | } | |
334 | } | |
335 | if (idev) | |
336 | dev_put(idev); | |
337 | } | |
1da177e4 | 338 | |
03db3a2d | 339 | mutex_lock(&table->lock); |
9c584f04 | 340 | write_lock_irq(&table->rwlock); |
1da177e4 | 341 | |
03db3a2d | 342 | ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID | |
b39ffa1d | 343 | GID_ATTR_FIND_MASK_GID_TYPE | |
cee3c4d0 | 344 | GID_ATTR_FIND_MASK_NETDEV, &empty); |
03db3a2d MB |
345 | if (ix >= 0) |
346 | goto out_unlock; | |
1da177e4 | 347 | |
cee3c4d0 | 348 | if (empty < 0) { |
03db3a2d MB |
349 | ret = -ENOSPC; |
350 | goto out_unlock; | |
351 | } | |
352 | ||
cee3c4d0 | 353 | ret = add_gid(ib_dev, port, table, empty, gid, attr, false); |
9c584f04 MB |
354 | if (!ret) |
355 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
356 | |
357 | out_unlock: | |
9c584f04 | 358 | write_unlock_irq(&table->rwlock); |
03db3a2d | 359 | mutex_unlock(&table->lock); |
1da177e4 LT |
360 | return ret; |
361 | } | |
1da177e4 | 362 | |
03db3a2d MB |
363 | int ib_cache_gid_del(struct ib_device *ib_dev, u8 port, |
364 | union ib_gid *gid, struct ib_gid_attr *attr) | |
1da177e4 | 365 | { |
03db3a2d MB |
366 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; |
367 | struct ib_gid_table *table; | |
368 | int ix; | |
369 | ||
370 | table = ports_table[port - rdma_start_port(ib_dev)]; | |
371 | ||
372 | mutex_lock(&table->lock); | |
9c584f04 | 373 | write_lock_irq(&table->rwlock); |
03db3a2d MB |
374 | |
375 | ix = find_gid(table, gid, attr, false, | |
376 | GID_ATTR_FIND_MASK_GID | | |
b39ffa1d | 377 | GID_ATTR_FIND_MASK_GID_TYPE | |
03db3a2d | 378 | GID_ATTR_FIND_MASK_NETDEV | |
cee3c4d0 MB |
379 | GID_ATTR_FIND_MASK_DEFAULT, |
380 | NULL); | |
03db3a2d MB |
381 | if (ix < 0) |
382 | goto out_unlock; | |
383 | ||
9c584f04 MB |
384 | if (!del_gid(ib_dev, port, table, ix, false)) |
385 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
386 | |
387 | out_unlock: | |
9c584f04 | 388 | write_unlock_irq(&table->rwlock); |
03db3a2d MB |
389 | mutex_unlock(&table->lock); |
390 | return 0; | |
391 | } | |
392 | ||
393 | int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, | |
394 | struct net_device *ndev) | |
395 | { | |
396 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
397 | struct ib_gid_table *table; | |
398 | int ix; | |
9c584f04 | 399 | bool deleted = false; |
03db3a2d MB |
400 | |
401 | table = ports_table[port - rdma_start_port(ib_dev)]; | |
402 | ||
403 | mutex_lock(&table->lock); | |
9c584f04 | 404 | write_lock_irq(&table->rwlock); |
03db3a2d MB |
405 | |
406 | for (ix = 0; ix < table->sz; ix++) | |
407 | if (table->data_vec[ix].attr.ndev == ndev) | |
9c584f04 MB |
408 | if (!del_gid(ib_dev, port, table, ix, false)) |
409 | deleted = true; | |
03db3a2d | 410 | |
9c584f04 | 411 | write_unlock_irq(&table->rwlock); |
03db3a2d | 412 | mutex_unlock(&table->lock); |
9c584f04 MB |
413 | |
414 | if (deleted) | |
415 | dispatch_gid_change_event(ib_dev, port); | |
416 | ||
03db3a2d MB |
417 | return 0; |
418 | } | |
419 | ||
420 | static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index, | |
421 | union ib_gid *gid, struct ib_gid_attr *attr) | |
422 | { | |
423 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
424 | struct ib_gid_table *table; | |
1da177e4 | 425 | |
03db3a2d | 426 | table = ports_table[port - rdma_start_port(ib_dev)]; |
1da177e4 | 427 | |
03db3a2d MB |
428 | if (index < 0 || index >= table->sz) |
429 | return -EINVAL; | |
1da177e4 | 430 | |
9c584f04 | 431 | if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID) |
03db3a2d | 432 | return -EAGAIN; |
03db3a2d MB |
433 | |
434 | memcpy(gid, &table->data_vec[index].gid, sizeof(*gid)); | |
435 | if (attr) { | |
436 | memcpy(attr, &table->data_vec[index].attr, sizeof(*attr)); | |
437 | if (attr->ndev) | |
438 | dev_hold(attr->ndev); | |
439 | } | |
440 | ||
03db3a2d MB |
441 | return 0; |
442 | } | |
443 | ||
444 | static int _ib_cache_gid_table_find(struct ib_device *ib_dev, | |
445 | const union ib_gid *gid, | |
446 | const struct ib_gid_attr *val, | |
447 | unsigned long mask, | |
448 | u8 *port, u16 *index) | |
449 | { | |
450 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
451 | struct ib_gid_table *table; | |
452 | u8 p; | |
453 | int local_index; | |
9c584f04 | 454 | unsigned long flags; |
03db3a2d MB |
455 | |
456 | for (p = 0; p < ib_dev->phys_port_cnt; p++) { | |
457 | table = ports_table[p]; | |
9c584f04 | 458 | read_lock_irqsave(&table->rwlock, flags); |
cee3c4d0 | 459 | local_index = find_gid(table, gid, val, false, mask, NULL); |
03db3a2d MB |
460 | if (local_index >= 0) { |
461 | if (index) | |
462 | *index = local_index; | |
463 | if (port) | |
464 | *port = p + rdma_start_port(ib_dev); | |
9c584f04 | 465 | read_unlock_irqrestore(&table->rwlock, flags); |
03db3a2d | 466 | return 0; |
1da177e4 | 467 | } |
9c584f04 | 468 | read_unlock_irqrestore(&table->rwlock, flags); |
1da177e4 | 469 | } |
1da177e4 | 470 | |
03db3a2d MB |
471 | return -ENOENT; |
472 | } | |
473 | ||
474 | static int ib_cache_gid_find(struct ib_device *ib_dev, | |
475 | const union ib_gid *gid, | |
b39ffa1d | 476 | enum ib_gid_type gid_type, |
03db3a2d MB |
477 | struct net_device *ndev, u8 *port, |
478 | u16 *index) | |
479 | { | |
b39ffa1d MB |
480 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
481 | GID_ATTR_FIND_MASK_GID_TYPE; | |
482 | struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type}; | |
03db3a2d MB |
483 | |
484 | if (ndev) | |
485 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
486 | ||
487 | return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val, | |
488 | mask, port, index); | |
489 | } | |
490 | ||
d300ec52 MB |
491 | int ib_find_cached_gid_by_port(struct ib_device *ib_dev, |
492 | const union ib_gid *gid, | |
b39ffa1d | 493 | enum ib_gid_type gid_type, |
d300ec52 MB |
494 | u8 port, struct net_device *ndev, |
495 | u16 *index) | |
03db3a2d MB |
496 | { |
497 | int local_index; | |
498 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
499 | struct ib_gid_table *table; | |
b39ffa1d MB |
500 | unsigned long mask = GID_ATTR_FIND_MASK_GID | |
501 | GID_ATTR_FIND_MASK_GID_TYPE; | |
502 | struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type}; | |
9c584f04 | 503 | unsigned long flags; |
03db3a2d MB |
504 | |
505 | if (port < rdma_start_port(ib_dev) || | |
506 | port > rdma_end_port(ib_dev)) | |
507 | return -ENOENT; | |
508 | ||
509 | table = ports_table[port - rdma_start_port(ib_dev)]; | |
510 | ||
511 | if (ndev) | |
512 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
513 | ||
9c584f04 | 514 | read_lock_irqsave(&table->rwlock, flags); |
cee3c4d0 | 515 | local_index = find_gid(table, gid, &val, false, mask, NULL); |
03db3a2d MB |
516 | if (local_index >= 0) { |
517 | if (index) | |
518 | *index = local_index; | |
9c584f04 | 519 | read_unlock_irqrestore(&table->rwlock, flags); |
03db3a2d MB |
520 | return 0; |
521 | } | |
522 | ||
9c584f04 | 523 | read_unlock_irqrestore(&table->rwlock, flags); |
03db3a2d MB |
524 | return -ENOENT; |
525 | } | |
d300ec52 | 526 | EXPORT_SYMBOL(ib_find_cached_gid_by_port); |
03db3a2d | 527 | |
99b27e3b MB |
528 | /** |
529 | * ib_find_gid_by_filter - Returns the GID table index where a specified | |
530 | * GID value occurs | |
531 | * @device: The device to query. | |
532 | * @gid: The GID value to search for. | |
533 | * @port_num: The port number of the device where the GID value could be | |
534 | * searched. | |
535 | * @filter: The filter function is executed on any matching GID in the table. | |
536 | * If the filter function returns true, the corresponding index is returned, | |
537 | * otherwise, we continue searching the GID table. It's guaranteed that | |
538 | * while filter is executed, ndev field is valid and the structure won't | |
539 | * change. filter is executed in an atomic context. filter must not be NULL. | |
540 | * @index: The index into the cached GID table where the GID was found. This | |
541 | * parameter may be NULL. | |
542 | * | |
543 | * ib_cache_gid_find_by_filter() searches for the specified GID value | |
544 | * of which the filter function returns true in the port's GID table. | |
545 | * This function is only supported on RoCE ports. | |
546 | * | |
547 | */ | |
548 | static int ib_cache_gid_find_by_filter(struct ib_device *ib_dev, | |
549 | const union ib_gid *gid, | |
550 | u8 port, | |
551 | bool (*filter)(const union ib_gid *, | |
552 | const struct ib_gid_attr *, | |
553 | void *), | |
554 | void *context, | |
555 | u16 *index) | |
556 | { | |
557 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
558 | struct ib_gid_table *table; | |
559 | unsigned int i; | |
9c584f04 | 560 | unsigned long flags; |
99b27e3b MB |
561 | bool found = false; |
562 | ||
563 | if (!ports_table) | |
564 | return -EOPNOTSUPP; | |
565 | ||
566 | if (port < rdma_start_port(ib_dev) || | |
567 | port > rdma_end_port(ib_dev) || | |
568 | !rdma_protocol_roce(ib_dev, port)) | |
569 | return -EPROTONOSUPPORT; | |
570 | ||
571 | table = ports_table[port - rdma_start_port(ib_dev)]; | |
572 | ||
9c584f04 | 573 | read_lock_irqsave(&table->rwlock, flags); |
99b27e3b MB |
574 | for (i = 0; i < table->sz; i++) { |
575 | struct ib_gid_attr attr; | |
99b27e3b | 576 | |
99b27e3b MB |
577 | if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID) |
578 | goto next; | |
579 | ||
580 | if (memcmp(gid, &table->data_vec[i].gid, sizeof(*gid))) | |
581 | goto next; | |
582 | ||
583 | memcpy(&attr, &table->data_vec[i].attr, sizeof(attr)); | |
584 | ||
585 | if (filter(gid, &attr, context)) | |
586 | found = true; | |
587 | ||
588 | next: | |
99b27e3b MB |
589 | if (found) |
590 | break; | |
591 | } | |
9c584f04 | 592 | read_unlock_irqrestore(&table->rwlock, flags); |
99b27e3b MB |
593 | |
594 | if (!found) | |
595 | return -ENOENT; | |
596 | ||
597 | if (index) | |
598 | *index = i; | |
599 | return 0; | |
600 | } | |
601 | ||
03db3a2d MB |
602 | static struct ib_gid_table *alloc_gid_table(int sz) |
603 | { | |
03db3a2d MB |
604 | struct ib_gid_table *table = |
605 | kzalloc(sizeof(struct ib_gid_table), GFP_KERNEL); | |
9c584f04 | 606 | |
03db3a2d MB |
607 | if (!table) |
608 | return NULL; | |
609 | ||
610 | table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL); | |
611 | if (!table->data_vec) | |
612 | goto err_free_table; | |
613 | ||
614 | mutex_init(&table->lock); | |
615 | ||
616 | table->sz = sz; | |
9c584f04 | 617 | rwlock_init(&table->rwlock); |
03db3a2d MB |
618 | |
619 | return table; | |
620 | ||
621 | err_free_table: | |
622 | kfree(table); | |
623 | return NULL; | |
624 | } | |
625 | ||
626 | static void release_gid_table(struct ib_gid_table *table) | |
627 | { | |
628 | if (table) { | |
629 | kfree(table->data_vec); | |
630 | kfree(table); | |
631 | } | |
632 | } | |
633 | ||
634 | static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port, | |
635 | struct ib_gid_table *table) | |
636 | { | |
637 | int i; | |
9c584f04 | 638 | bool deleted = false; |
03db3a2d MB |
639 | |
640 | if (!table) | |
641 | return; | |
642 | ||
9c584f04 | 643 | write_lock_irq(&table->rwlock); |
03db3a2d MB |
644 | for (i = 0; i < table->sz; ++i) { |
645 | if (memcmp(&table->data_vec[i].gid, &zgid, | |
646 | sizeof(table->data_vec[i].gid))) | |
9c584f04 MB |
647 | if (!del_gid(ib_dev, port, table, i, |
648 | table->data_vec[i].props & | |
649 | GID_ATTR_FIND_MASK_DEFAULT)) | |
650 | deleted = true; | |
03db3a2d | 651 | } |
9c584f04 MB |
652 | write_unlock_irq(&table->rwlock); |
653 | ||
654 | if (deleted) | |
655 | dispatch_gid_change_event(ib_dev, port); | |
03db3a2d MB |
656 | } |
657 | ||
658 | void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port, | |
659 | struct net_device *ndev, | |
b39ffa1d | 660 | unsigned long gid_type_mask, |
03db3a2d MB |
661 | enum ib_cache_gid_default_mode mode) |
662 | { | |
663 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
664 | union ib_gid gid; | |
665 | struct ib_gid_attr gid_attr; | |
b39ffa1d | 666 | struct ib_gid_attr zattr_type = zattr; |
03db3a2d | 667 | struct ib_gid_table *table; |
b39ffa1d | 668 | unsigned int gid_type; |
03db3a2d MB |
669 | |
670 | table = ports_table[port - rdma_start_port(ib_dev)]; | |
671 | ||
672 | make_default_gid(ndev, &gid); | |
673 | memset(&gid_attr, 0, sizeof(gid_attr)); | |
674 | gid_attr.ndev = ndev; | |
675 | ||
b39ffa1d MB |
676 | for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) { |
677 | int ix; | |
678 | union ib_gid current_gid; | |
679 | struct ib_gid_attr current_gid_attr = {}; | |
680 | ||
681 | if (1UL << gid_type & ~gid_type_mask) | |
682 | continue; | |
683 | ||
684 | gid_attr.gid_type = gid_type; | |
685 | ||
686 | mutex_lock(&table->lock); | |
687 | write_lock_irq(&table->rwlock); | |
688 | ix = find_gid(table, NULL, &gid_attr, true, | |
689 | GID_ATTR_FIND_MASK_GID_TYPE | | |
690 | GID_ATTR_FIND_MASK_DEFAULT, | |
691 | NULL); | |
692 | ||
693 | /* Coudn't find default GID location */ | |
f4e7de63 DL |
694 | if (WARN_ON(ix < 0)) |
695 | goto release; | |
b39ffa1d MB |
696 | |
697 | zattr_type.gid_type = gid_type; | |
698 | ||
699 | if (!__ib_cache_gid_get(ib_dev, port, ix, | |
700 | ¤t_gid, ¤t_gid_attr) && | |
701 | mode == IB_CACHE_GID_DEFAULT_MODE_SET && | |
702 | !memcmp(&gid, ¤t_gid, sizeof(gid)) && | |
703 | !memcmp(&gid_attr, ¤t_gid_attr, sizeof(gid_attr))) | |
704 | goto release; | |
705 | ||
706 | if (memcmp(¤t_gid, &zgid, sizeof(current_gid)) || | |
707 | memcmp(¤t_gid_attr, &zattr_type, | |
708 | sizeof(current_gid_attr))) { | |
709 | if (del_gid(ib_dev, port, table, ix, true)) { | |
710 | pr_warn("ib_cache_gid: can't delete index %d for default gid %pI6\n", | |
711 | ix, gid.raw); | |
712 | goto release; | |
713 | } else { | |
714 | dispatch_gid_change_event(ib_dev, port); | |
715 | } | |
9c584f04 | 716 | } |
03db3a2d | 717 | |
b39ffa1d MB |
718 | if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) { |
719 | if (add_gid(ib_dev, port, table, ix, &gid, &gid_attr, true)) | |
720 | pr_warn("ib_cache_gid: unable to add default gid %pI6\n", | |
721 | gid.raw); | |
722 | else | |
723 | dispatch_gid_change_event(ib_dev, port); | |
9c584f04 | 724 | } |
03db3a2d | 725 | |
b39ffa1d MB |
726 | release: |
727 | if (current_gid_attr.ndev) | |
728 | dev_put(current_gid_attr.ndev); | |
729 | write_unlock_irq(&table->rwlock); | |
730 | mutex_unlock(&table->lock); | |
731 | } | |
03db3a2d MB |
732 | } |
733 | ||
734 | static int gid_table_reserve_default(struct ib_device *ib_dev, u8 port, | |
735 | struct ib_gid_table *table) | |
736 | { | |
b39ffa1d MB |
737 | unsigned int i; |
738 | unsigned long roce_gid_type_mask; | |
739 | unsigned int num_default_gids; | |
740 | unsigned int current_gid = 0; | |
741 | ||
742 | roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port); | |
743 | num_default_gids = hweight_long(roce_gid_type_mask); | |
744 | for (i = 0; i < num_default_gids && i < table->sz; i++) { | |
745 | struct ib_gid_table_entry *entry = | |
746 | &table->data_vec[i]; | |
03db3a2d MB |
747 | |
748 | entry->props |= GID_TABLE_ENTRY_DEFAULT; | |
b39ffa1d MB |
749 | current_gid = find_next_bit(&roce_gid_type_mask, |
750 | BITS_PER_LONG, | |
751 | current_gid); | |
752 | entry->attr.gid_type = current_gid++; | |
03db3a2d MB |
753 | } |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
758 | static int _gid_table_setup_one(struct ib_device *ib_dev) | |
759 | { | |
760 | u8 port; | |
761 | struct ib_gid_table **table; | |
762 | int err = 0; | |
763 | ||
764 | table = kcalloc(ib_dev->phys_port_cnt, sizeof(*table), GFP_KERNEL); | |
765 | ||
766 | if (!table) { | |
767 | pr_warn("failed to allocate ib gid cache for %s\n", | |
768 | ib_dev->name); | |
769 | return -ENOMEM; | |
770 | } | |
771 | ||
772 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { | |
773 | u8 rdma_port = port + rdma_start_port(ib_dev); | |
774 | ||
775 | table[port] = | |
776 | alloc_gid_table( | |
777 | ib_dev->port_immutable[rdma_port].gid_tbl_len); | |
778 | if (!table[port]) { | |
779 | err = -ENOMEM; | |
780 | goto rollback_table_setup; | |
781 | } | |
782 | ||
783 | err = gid_table_reserve_default(ib_dev, | |
784 | port + rdma_start_port(ib_dev), | |
785 | table[port]); | |
786 | if (err) | |
787 | goto rollback_table_setup; | |
788 | } | |
789 | ||
790 | ib_dev->cache.gid_cache = table; | |
791 | return 0; | |
792 | ||
793 | rollback_table_setup: | |
794 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { | |
795 | cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev), | |
796 | table[port]); | |
797 | release_gid_table(table[port]); | |
798 | } | |
799 | ||
800 | kfree(table); | |
801 | return err; | |
802 | } | |
803 | ||
804 | static void gid_table_release_one(struct ib_device *ib_dev) | |
805 | { | |
806 | struct ib_gid_table **table = ib_dev->cache.gid_cache; | |
807 | u8 port; | |
808 | ||
809 | if (!table) | |
810 | return; | |
811 | ||
812 | for (port = 0; port < ib_dev->phys_port_cnt; port++) | |
813 | release_gid_table(table[port]); | |
814 | ||
815 | kfree(table); | |
816 | ib_dev->cache.gid_cache = NULL; | |
817 | } | |
818 | ||
819 | static void gid_table_cleanup_one(struct ib_device *ib_dev) | |
820 | { | |
821 | struct ib_gid_table **table = ib_dev->cache.gid_cache; | |
822 | u8 port; | |
823 | ||
824 | if (!table) | |
825 | return; | |
826 | ||
827 | for (port = 0; port < ib_dev->phys_port_cnt; port++) | |
828 | cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev), | |
829 | table[port]); | |
830 | } | |
831 | ||
832 | static int gid_table_setup_one(struct ib_device *ib_dev) | |
833 | { | |
834 | int err; | |
835 | ||
836 | err = _gid_table_setup_one(ib_dev); | |
837 | ||
838 | if (err) | |
839 | return err; | |
840 | ||
841 | err = roce_rescan_device(ib_dev); | |
842 | ||
843 | if (err) { | |
844 | gid_table_cleanup_one(ib_dev); | |
845 | gid_table_release_one(ib_dev); | |
846 | } | |
847 | ||
848 | return err; | |
849 | } | |
850 | ||
851 | int ib_get_cached_gid(struct ib_device *device, | |
852 | u8 port_num, | |
853 | int index, | |
55ee3ab2 MB |
854 | union ib_gid *gid, |
855 | struct ib_gid_attr *gid_attr) | |
03db3a2d | 856 | { |
9c584f04 MB |
857 | int res; |
858 | unsigned long flags; | |
859 | struct ib_gid_table **ports_table = device->cache.gid_cache; | |
860 | struct ib_gid_table *table = ports_table[port_num - rdma_start_port(device)]; | |
861 | ||
03db3a2d MB |
862 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
863 | return -EINVAL; | |
864 | ||
9c584f04 MB |
865 | read_lock_irqsave(&table->rwlock, flags); |
866 | res = __ib_cache_gid_get(device, port_num, index, gid, gid_attr); | |
867 | read_unlock_irqrestore(&table->rwlock, flags); | |
868 | ||
869 | return res; | |
03db3a2d MB |
870 | } |
871 | EXPORT_SYMBOL(ib_get_cached_gid); | |
872 | ||
873 | int ib_find_cached_gid(struct ib_device *device, | |
874 | const union ib_gid *gid, | |
b39ffa1d | 875 | enum ib_gid_type gid_type, |
55ee3ab2 | 876 | struct net_device *ndev, |
03db3a2d MB |
877 | u8 *port_num, |
878 | u16 *index) | |
879 | { | |
b39ffa1d | 880 | return ib_cache_gid_find(device, gid, gid_type, ndev, port_num, index); |
1da177e4 LT |
881 | } |
882 | EXPORT_SYMBOL(ib_find_cached_gid); | |
883 | ||
99b27e3b MB |
884 | int ib_find_gid_by_filter(struct ib_device *device, |
885 | const union ib_gid *gid, | |
886 | u8 port_num, | |
887 | bool (*filter)(const union ib_gid *gid, | |
888 | const struct ib_gid_attr *, | |
889 | void *), | |
890 | void *context, u16 *index) | |
891 | { | |
892 | /* Only RoCE GID table supports filter function */ | |
893 | if (!rdma_cap_roce_gid_table(device, port_num) && filter) | |
894 | return -EPROTONOSUPPORT; | |
895 | ||
896 | return ib_cache_gid_find_by_filter(device, gid, | |
897 | port_num, filter, | |
898 | context, index); | |
899 | } | |
900 | EXPORT_SYMBOL(ib_find_gid_by_filter); | |
901 | ||
1da177e4 LT |
902 | int ib_get_cached_pkey(struct ib_device *device, |
903 | u8 port_num, | |
904 | int index, | |
905 | u16 *pkey) | |
906 | { | |
907 | struct ib_pkey_cache *cache; | |
908 | unsigned long flags; | |
909 | int ret = 0; | |
910 | ||
0cf18d77 | 911 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
1da177e4 LT |
912 | return -EINVAL; |
913 | ||
914 | read_lock_irqsave(&device->cache.lock, flags); | |
915 | ||
0cf18d77 | 916 | cache = device->cache.pkey_cache[port_num - rdma_start_port(device)]; |
1da177e4 LT |
917 | |
918 | if (index < 0 || index >= cache->table_len) | |
919 | ret = -EINVAL; | |
920 | else | |
921 | *pkey = cache->table[index]; | |
922 | ||
923 | read_unlock_irqrestore(&device->cache.lock, flags); | |
924 | ||
925 | return ret; | |
926 | } | |
927 | EXPORT_SYMBOL(ib_get_cached_pkey); | |
928 | ||
929 | int ib_find_cached_pkey(struct ib_device *device, | |
930 | u8 port_num, | |
931 | u16 pkey, | |
932 | u16 *index) | |
933 | { | |
934 | struct ib_pkey_cache *cache; | |
935 | unsigned long flags; | |
936 | int i; | |
937 | int ret = -ENOENT; | |
ff7166c4 | 938 | int partial_ix = -1; |
1da177e4 | 939 | |
0cf18d77 | 940 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
1da177e4 LT |
941 | return -EINVAL; |
942 | ||
943 | read_lock_irqsave(&device->cache.lock, flags); | |
944 | ||
0cf18d77 | 945 | cache = device->cache.pkey_cache[port_num - rdma_start_port(device)]; |
1da177e4 LT |
946 | |
947 | *index = -1; | |
948 | ||
949 | for (i = 0; i < cache->table_len; ++i) | |
950 | if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) { | |
ff7166c4 JM |
951 | if (cache->table[i] & 0x8000) { |
952 | *index = i; | |
953 | ret = 0; | |
954 | break; | |
955 | } else | |
956 | partial_ix = i; | |
1da177e4 LT |
957 | } |
958 | ||
ff7166c4 JM |
959 | if (ret && partial_ix >= 0) { |
960 | *index = partial_ix; | |
961 | ret = 0; | |
962 | } | |
963 | ||
1da177e4 LT |
964 | read_unlock_irqrestore(&device->cache.lock, flags); |
965 | ||
966 | return ret; | |
967 | } | |
968 | EXPORT_SYMBOL(ib_find_cached_pkey); | |
969 | ||
73aaa741 JM |
970 | int ib_find_exact_cached_pkey(struct ib_device *device, |
971 | u8 port_num, | |
972 | u16 pkey, | |
973 | u16 *index) | |
974 | { | |
975 | struct ib_pkey_cache *cache; | |
976 | unsigned long flags; | |
977 | int i; | |
978 | int ret = -ENOENT; | |
979 | ||
0cf18d77 | 980 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
73aaa741 JM |
981 | return -EINVAL; |
982 | ||
983 | read_lock_irqsave(&device->cache.lock, flags); | |
984 | ||
0cf18d77 | 985 | cache = device->cache.pkey_cache[port_num - rdma_start_port(device)]; |
73aaa741 JM |
986 | |
987 | *index = -1; | |
988 | ||
989 | for (i = 0; i < cache->table_len; ++i) | |
990 | if (cache->table[i] == pkey) { | |
991 | *index = i; | |
992 | ret = 0; | |
993 | break; | |
994 | } | |
995 | ||
996 | read_unlock_irqrestore(&device->cache.lock, flags); | |
997 | ||
998 | return ret; | |
999 | } | |
1000 | EXPORT_SYMBOL(ib_find_exact_cached_pkey); | |
1001 | ||
6fb9cdbf JM |
1002 | int ib_get_cached_lmc(struct ib_device *device, |
1003 | u8 port_num, | |
1004 | u8 *lmc) | |
1005 | { | |
1006 | unsigned long flags; | |
1007 | int ret = 0; | |
1008 | ||
0cf18d77 | 1009 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
6fb9cdbf JM |
1010 | return -EINVAL; |
1011 | ||
1012 | read_lock_irqsave(&device->cache.lock, flags); | |
0cf18d77 | 1013 | *lmc = device->cache.lmc_cache[port_num - rdma_start_port(device)]; |
6fb9cdbf JM |
1014 | read_unlock_irqrestore(&device->cache.lock, flags); |
1015 | ||
1016 | return ret; | |
1017 | } | |
1018 | EXPORT_SYMBOL(ib_get_cached_lmc); | |
1019 | ||
1da177e4 LT |
1020 | static void ib_cache_update(struct ib_device *device, |
1021 | u8 port) | |
1022 | { | |
1023 | struct ib_port_attr *tprops = NULL; | |
1024 | struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache; | |
03db3a2d MB |
1025 | struct ib_gid_cache { |
1026 | int table_len; | |
1027 | union ib_gid table[0]; | |
1028 | } *gid_cache = NULL; | |
1da177e4 LT |
1029 | int i; |
1030 | int ret; | |
03db3a2d MB |
1031 | struct ib_gid_table *table; |
1032 | struct ib_gid_table **ports_table = device->cache.gid_cache; | |
1033 | bool use_roce_gid_table = | |
1034 | rdma_cap_roce_gid_table(device, port); | |
1035 | ||
1036 | if (port < rdma_start_port(device) || port > rdma_end_port(device)) | |
1037 | return; | |
1038 | ||
1039 | table = ports_table[port - rdma_start_port(device)]; | |
1da177e4 LT |
1040 | |
1041 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); | |
1042 | if (!tprops) | |
1043 | return; | |
1044 | ||
1045 | ret = ib_query_port(device, port, tprops); | |
1046 | if (ret) { | |
aba25a3e PP |
1047 | pr_warn("ib_query_port failed (%d) for %s\n", |
1048 | ret, device->name); | |
1da177e4 LT |
1049 | goto err; |
1050 | } | |
1051 | ||
1052 | pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len * | |
1053 | sizeof *pkey_cache->table, GFP_KERNEL); | |
1054 | if (!pkey_cache) | |
1055 | goto err; | |
1056 | ||
1057 | pkey_cache->table_len = tprops->pkey_tbl_len; | |
1058 | ||
03db3a2d MB |
1059 | if (!use_roce_gid_table) { |
1060 | gid_cache = kmalloc(sizeof(*gid_cache) + tprops->gid_tbl_len * | |
1061 | sizeof(*gid_cache->table), GFP_KERNEL); | |
1062 | if (!gid_cache) | |
1063 | goto err; | |
1da177e4 | 1064 | |
03db3a2d MB |
1065 | gid_cache->table_len = tprops->gid_tbl_len; |
1066 | } | |
1da177e4 LT |
1067 | |
1068 | for (i = 0; i < pkey_cache->table_len; ++i) { | |
1069 | ret = ib_query_pkey(device, port, i, pkey_cache->table + i); | |
1070 | if (ret) { | |
aba25a3e PP |
1071 | pr_warn("ib_query_pkey failed (%d) for %s (index %d)\n", |
1072 | ret, device->name, i); | |
1da177e4 LT |
1073 | goto err; |
1074 | } | |
1075 | } | |
1076 | ||
03db3a2d MB |
1077 | if (!use_roce_gid_table) { |
1078 | for (i = 0; i < gid_cache->table_len; ++i) { | |
1079 | ret = ib_query_gid(device, port, i, | |
55ee3ab2 | 1080 | gid_cache->table + i, NULL); |
03db3a2d | 1081 | if (ret) { |
aba25a3e PP |
1082 | pr_warn("ib_query_gid failed (%d) for %s (index %d)\n", |
1083 | ret, device->name, i); | |
03db3a2d MB |
1084 | goto err; |
1085 | } | |
1da177e4 LT |
1086 | } |
1087 | } | |
1088 | ||
1089 | write_lock_irq(&device->cache.lock); | |
1090 | ||
0cf18d77 | 1091 | old_pkey_cache = device->cache.pkey_cache[port - rdma_start_port(device)]; |
1da177e4 | 1092 | |
0cf18d77 | 1093 | device->cache.pkey_cache[port - rdma_start_port(device)] = pkey_cache; |
03db3a2d | 1094 | if (!use_roce_gid_table) { |
9c584f04 | 1095 | write_lock(&table->rwlock); |
03db3a2d MB |
1096 | for (i = 0; i < gid_cache->table_len; i++) { |
1097 | modify_gid(device, port, table, i, gid_cache->table + i, | |
1098 | &zattr, false); | |
1099 | } | |
9c584f04 | 1100 | write_unlock(&table->rwlock); |
03db3a2d | 1101 | } |
1da177e4 | 1102 | |
0cf18d77 | 1103 | device->cache.lmc_cache[port - rdma_start_port(device)] = tprops->lmc; |
6fb9cdbf | 1104 | |
1da177e4 LT |
1105 | write_unlock_irq(&device->cache.lock); |
1106 | ||
03db3a2d | 1107 | kfree(gid_cache); |
1da177e4 | 1108 | kfree(old_pkey_cache); |
1da177e4 LT |
1109 | kfree(tprops); |
1110 | return; | |
1111 | ||
1112 | err: | |
1113 | kfree(pkey_cache); | |
1114 | kfree(gid_cache); | |
1115 | kfree(tprops); | |
1116 | } | |
1117 | ||
c4028958 | 1118 | static void ib_cache_task(struct work_struct *_work) |
1da177e4 | 1119 | { |
c4028958 DH |
1120 | struct ib_update_work *work = |
1121 | container_of(_work, struct ib_update_work, work); | |
1da177e4 LT |
1122 | |
1123 | ib_cache_update(work->device, work->port_num); | |
1124 | kfree(work); | |
1125 | } | |
1126 | ||
1127 | static void ib_cache_event(struct ib_event_handler *handler, | |
1128 | struct ib_event *event) | |
1129 | { | |
1130 | struct ib_update_work *work; | |
1131 | ||
1132 | if (event->event == IB_EVENT_PORT_ERR || | |
1133 | event->event == IB_EVENT_PORT_ACTIVE || | |
1134 | event->event == IB_EVENT_LID_CHANGE || | |
1135 | event->event == IB_EVENT_PKEY_CHANGE || | |
acaea9ee | 1136 | event->event == IB_EVENT_SM_CHANGE || |
761d90ed OG |
1137 | event->event == IB_EVENT_CLIENT_REREGISTER || |
1138 | event->event == IB_EVENT_GID_CHANGE) { | |
1da177e4 LT |
1139 | work = kmalloc(sizeof *work, GFP_ATOMIC); |
1140 | if (work) { | |
c4028958 | 1141 | INIT_WORK(&work->work, ib_cache_task); |
1da177e4 LT |
1142 | work->device = event->device; |
1143 | work->port_num = event->element.port_num; | |
f0626710 | 1144 | queue_work(ib_wq, &work->work); |
1da177e4 LT |
1145 | } |
1146 | } | |
1147 | } | |
1148 | ||
03db3a2d | 1149 | int ib_cache_setup_one(struct ib_device *device) |
1da177e4 LT |
1150 | { |
1151 | int p; | |
03db3a2d | 1152 | int err; |
1da177e4 LT |
1153 | |
1154 | rwlock_init(&device->cache.lock); | |
1155 | ||
1156 | device->cache.pkey_cache = | |
55aeed06 | 1157 | kzalloc(sizeof *device->cache.pkey_cache * |
0cf18d77 | 1158 | (rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL); |
6fb9cdbf | 1159 | device->cache.lmc_cache = kmalloc(sizeof *device->cache.lmc_cache * |
0cf18d77 IW |
1160 | (rdma_end_port(device) - |
1161 | rdma_start_port(device) + 1), | |
6fb9cdbf | 1162 | GFP_KERNEL); |
03db3a2d | 1163 | if (!device->cache.pkey_cache || |
6fb9cdbf | 1164 | !device->cache.lmc_cache) { |
aba25a3e | 1165 | pr_warn("Couldn't allocate cache for %s\n", device->name); |
03db3a2d | 1166 | return -ENOMEM; |
1da177e4 LT |
1167 | } |
1168 | ||
03db3a2d MB |
1169 | err = gid_table_setup_one(device); |
1170 | if (err) | |
1171 | /* Allocated memory will be cleaned in the release function */ | |
1172 | return err; | |
1173 | ||
55aeed06 | 1174 | for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p) |
0cf18d77 | 1175 | ib_cache_update(device, p + rdma_start_port(device)); |
1da177e4 LT |
1176 | |
1177 | INIT_IB_EVENT_HANDLER(&device->cache.event_handler, | |
1178 | device, ib_cache_event); | |
03db3a2d MB |
1179 | err = ib_register_event_handler(&device->cache.event_handler); |
1180 | if (err) | |
1181 | goto err; | |
1da177e4 | 1182 | |
03db3a2d | 1183 | return 0; |
1da177e4 LT |
1184 | |
1185 | err: | |
03db3a2d MB |
1186 | gid_table_cleanup_one(device); |
1187 | return err; | |
1da177e4 LT |
1188 | } |
1189 | ||
03db3a2d | 1190 | void ib_cache_release_one(struct ib_device *device) |
1da177e4 LT |
1191 | { |
1192 | int p; | |
1193 | ||
03db3a2d MB |
1194 | /* |
1195 | * The release function frees all the cache elements. | |
1196 | * This function should be called as part of freeing | |
1197 | * all the device's resources when the cache could no | |
1198 | * longer be accessed. | |
1199 | */ | |
1200 | if (device->cache.pkey_cache) | |
1201 | for (p = 0; | |
1202 | p <= rdma_end_port(device) - rdma_start_port(device); ++p) | |
1203 | kfree(device->cache.pkey_cache[p]); | |
1204 | ||
1205 | gid_table_release_one(device); | |
1da177e4 | 1206 | kfree(device->cache.pkey_cache); |
6fb9cdbf | 1207 | kfree(device->cache.lmc_cache); |
1da177e4 LT |
1208 | } |
1209 | ||
03db3a2d MB |
1210 | void ib_cache_cleanup_one(struct ib_device *device) |
1211 | { | |
1212 | /* The cleanup function unregisters the event handler, | |
1213 | * waits for all in-progress workqueue elements and cleans | |
1214 | * up the GID cache. This function should be called after | |
1215 | * the device was removed from the devices list and all | |
1216 | * clients were removed, so the cache exists but is | |
1217 | * non-functional and shouldn't be updated anymore. | |
1218 | */ | |
1219 | ib_unregister_event_handler(&device->cache.event_handler); | |
1220 | flush_workqueue(ib_wq); | |
1221 | gid_table_cleanup_one(device); | |
1222 | } | |
1da177e4 | 1223 | |
03db3a2d | 1224 | void __init ib_cache_setup(void) |
1da177e4 | 1225 | { |
03db3a2d | 1226 | roce_gid_mgmt_init(); |
1da177e4 LT |
1227 | } |
1228 | ||
1229 | void __exit ib_cache_cleanup(void) | |
1230 | { | |
03db3a2d | 1231 | roce_gid_mgmt_cleanup(); |
1da177e4 | 1232 | } |