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, | |
67 | }; | |
68 | ||
69 | enum gid_table_entry_props { | |
70 | GID_TABLE_ENTRY_INVALID = 1UL << 0, | |
71 | GID_TABLE_ENTRY_DEFAULT = 1UL << 1, | |
72 | }; | |
73 | ||
74 | enum gid_table_write_action { | |
75 | GID_TABLE_WRITE_ACTION_ADD, | |
76 | GID_TABLE_WRITE_ACTION_DEL, | |
77 | /* MODIFY only updates the GID table. Currently only used by | |
78 | * ib_cache_update. | |
79 | */ | |
80 | GID_TABLE_WRITE_ACTION_MODIFY | |
81 | }; | |
82 | ||
83 | struct ib_gid_table_entry { | |
84 | /* This lock protects an entry from being | |
85 | * read and written simultaneously. | |
86 | */ | |
87 | rwlock_t lock; | |
88 | unsigned long props; | |
89 | union ib_gid gid; | |
90 | struct ib_gid_attr attr; | |
91 | void *context; | |
92 | }; | |
93 | ||
94 | struct ib_gid_table { | |
95 | int sz; | |
96 | /* In RoCE, adding a GID to the table requires: | |
97 | * (a) Find if this GID is already exists. | |
98 | * (b) Find a free space. | |
99 | * (c) Write the new GID | |
100 | * | |
101 | * Delete requires different set of operations: | |
102 | * (a) Find the GID | |
103 | * (b) Delete it. | |
104 | * | |
105 | * Add/delete should be carried out atomically. | |
106 | * This is done by locking this mutex from multiple | |
107 | * writers. We don't need this lock for IB, as the MAD | |
108 | * layer replaces all entries. All data_vec entries | |
109 | * are locked by this lock. | |
110 | **/ | |
111 | struct mutex lock; | |
112 | struct ib_gid_table_entry *data_vec; | |
113 | }; | |
114 | ||
115 | static int write_gid(struct ib_device *ib_dev, u8 port, | |
116 | struct ib_gid_table *table, int ix, | |
117 | const union ib_gid *gid, | |
118 | const struct ib_gid_attr *attr, | |
119 | enum gid_table_write_action action, | |
120 | bool default_gid) | |
1da177e4 | 121 | { |
03db3a2d MB |
122 | int ret = 0; |
123 | struct net_device *old_net_dev; | |
1da177e4 | 124 | unsigned long flags; |
03db3a2d MB |
125 | |
126 | /* in rdma_cap_roce_gid_table, this funciton should be protected by a | |
127 | * sleep-able lock. | |
128 | */ | |
129 | write_lock_irqsave(&table->data_vec[ix].lock, flags); | |
130 | ||
131 | if (rdma_cap_roce_gid_table(ib_dev, port)) { | |
132 | table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID; | |
133 | write_unlock_irqrestore(&table->data_vec[ix].lock, flags); | |
134 | /* GID_TABLE_WRITE_ACTION_MODIFY currently isn't supported by | |
135 | * RoCE providers and thus only updates the cache. | |
136 | */ | |
137 | if (action == GID_TABLE_WRITE_ACTION_ADD) | |
138 | ret = ib_dev->add_gid(ib_dev, port, ix, gid, attr, | |
139 | &table->data_vec[ix].context); | |
140 | else if (action == GID_TABLE_WRITE_ACTION_DEL) | |
141 | ret = ib_dev->del_gid(ib_dev, port, ix, | |
142 | &table->data_vec[ix].context); | |
143 | write_lock_irqsave(&table->data_vec[ix].lock, flags); | |
144 | } | |
145 | ||
146 | old_net_dev = table->data_vec[ix].attr.ndev; | |
147 | if (old_net_dev && old_net_dev != attr->ndev) | |
148 | dev_put(old_net_dev); | |
149 | /* if modify_gid failed, just delete the old gid */ | |
150 | if (ret || action == GID_TABLE_WRITE_ACTION_DEL) { | |
151 | gid = &zgid; | |
152 | attr = &zattr; | |
153 | table->data_vec[ix].context = NULL; | |
154 | } | |
155 | if (default_gid) | |
156 | table->data_vec[ix].props |= GID_TABLE_ENTRY_DEFAULT; | |
157 | memcpy(&table->data_vec[ix].gid, gid, sizeof(*gid)); | |
158 | memcpy(&table->data_vec[ix].attr, attr, sizeof(*attr)); | |
159 | if (table->data_vec[ix].attr.ndev && | |
160 | table->data_vec[ix].attr.ndev != old_net_dev) | |
161 | dev_hold(table->data_vec[ix].attr.ndev); | |
162 | ||
163 | table->data_vec[ix].props &= ~GID_TABLE_ENTRY_INVALID; | |
164 | ||
165 | write_unlock_irqrestore(&table->data_vec[ix].lock, flags); | |
166 | ||
167 | if (!ret && rdma_cap_roce_gid_table(ib_dev, port)) { | |
168 | struct ib_event event; | |
169 | ||
170 | event.device = ib_dev; | |
171 | event.element.port_num = port; | |
172 | event.event = IB_EVENT_GID_CHANGE; | |
173 | ||
174 | ib_dispatch_event(&event); | |
175 | } | |
176 | return ret; | |
177 | } | |
178 | ||
179 | static int add_gid(struct ib_device *ib_dev, u8 port, | |
180 | struct ib_gid_table *table, int ix, | |
181 | const union ib_gid *gid, | |
182 | const struct ib_gid_attr *attr, | |
183 | bool default_gid) { | |
184 | return write_gid(ib_dev, port, table, ix, gid, attr, | |
185 | GID_TABLE_WRITE_ACTION_ADD, default_gid); | |
186 | } | |
187 | ||
188 | static int modify_gid(struct ib_device *ib_dev, u8 port, | |
189 | struct ib_gid_table *table, int ix, | |
190 | const union ib_gid *gid, | |
191 | const struct ib_gid_attr *attr, | |
192 | bool default_gid) { | |
193 | return write_gid(ib_dev, port, table, ix, gid, attr, | |
194 | GID_TABLE_WRITE_ACTION_MODIFY, default_gid); | |
195 | } | |
196 | ||
197 | static int del_gid(struct ib_device *ib_dev, u8 port, | |
198 | struct ib_gid_table *table, int ix, | |
199 | bool default_gid) { | |
200 | return write_gid(ib_dev, port, table, ix, &zgid, &zattr, | |
201 | GID_TABLE_WRITE_ACTION_DEL, default_gid); | |
202 | } | |
203 | ||
204 | static int find_gid(struct ib_gid_table *table, const union ib_gid *gid, | |
205 | const struct ib_gid_attr *val, bool default_gid, | |
206 | unsigned long mask) | |
207 | { | |
208 | int i; | |
209 | ||
210 | for (i = 0; i < table->sz; i++) { | |
211 | unsigned long flags; | |
212 | struct ib_gid_attr *attr = &table->data_vec[i].attr; | |
213 | ||
214 | read_lock_irqsave(&table->data_vec[i].lock, flags); | |
215 | ||
216 | if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID) | |
217 | goto next; | |
218 | ||
219 | if (mask & GID_ATTR_FIND_MASK_GID && | |
220 | memcmp(gid, &table->data_vec[i].gid, sizeof(*gid))) | |
221 | goto next; | |
222 | ||
223 | if (mask & GID_ATTR_FIND_MASK_NETDEV && | |
224 | attr->ndev != val->ndev) | |
225 | goto next; | |
226 | ||
227 | if (mask & GID_ATTR_FIND_MASK_DEFAULT && | |
228 | !!(table->data_vec[i].props & GID_TABLE_ENTRY_DEFAULT) != | |
229 | default_gid) | |
230 | goto next; | |
231 | ||
232 | read_unlock_irqrestore(&table->data_vec[i].lock, flags); | |
233 | return i; | |
234 | next: | |
235 | read_unlock_irqrestore(&table->data_vec[i].lock, flags); | |
236 | } | |
237 | ||
238 | return -1; | |
239 | } | |
240 | ||
241 | static void make_default_gid(struct net_device *dev, union ib_gid *gid) | |
242 | { | |
243 | gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); | |
244 | addrconf_ifid_eui48(&gid->raw[8], dev); | |
245 | } | |
246 | ||
247 | int ib_cache_gid_add(struct ib_device *ib_dev, u8 port, | |
248 | union ib_gid *gid, struct ib_gid_attr *attr) | |
249 | { | |
250 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
251 | struct ib_gid_table *table; | |
252 | int ix; | |
1da177e4 | 253 | int ret = 0; |
03db3a2d | 254 | struct net_device *idev; |
1da177e4 | 255 | |
03db3a2d MB |
256 | table = ports_table[port - rdma_start_port(ib_dev)]; |
257 | ||
258 | if (!memcmp(gid, &zgid, sizeof(*gid))) | |
1da177e4 LT |
259 | return -EINVAL; |
260 | ||
03db3a2d MB |
261 | if (ib_dev->get_netdev) { |
262 | idev = ib_dev->get_netdev(ib_dev, port); | |
263 | if (idev && attr->ndev != idev) { | |
264 | union ib_gid default_gid; | |
1da177e4 | 265 | |
03db3a2d MB |
266 | /* Adding default GIDs in not permitted */ |
267 | make_default_gid(idev, &default_gid); | |
268 | if (!memcmp(gid, &default_gid, sizeof(*gid))) { | |
269 | dev_put(idev); | |
270 | return -EPERM; | |
271 | } | |
272 | } | |
273 | if (idev) | |
274 | dev_put(idev); | |
275 | } | |
1da177e4 | 276 | |
03db3a2d | 277 | mutex_lock(&table->lock); |
1da177e4 | 278 | |
03db3a2d MB |
279 | ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID | |
280 | GID_ATTR_FIND_MASK_NETDEV); | |
281 | if (ix >= 0) | |
282 | goto out_unlock; | |
1da177e4 | 283 | |
03db3a2d MB |
284 | ix = find_gid(table, &zgid, NULL, false, GID_ATTR_FIND_MASK_GID | |
285 | GID_ATTR_FIND_MASK_DEFAULT); | |
286 | if (ix < 0) { | |
287 | ret = -ENOSPC; | |
288 | goto out_unlock; | |
289 | } | |
290 | ||
291 | add_gid(ib_dev, port, table, ix, gid, attr, false); | |
292 | ||
293 | out_unlock: | |
294 | mutex_unlock(&table->lock); | |
1da177e4 LT |
295 | return ret; |
296 | } | |
1da177e4 | 297 | |
03db3a2d MB |
298 | int ib_cache_gid_del(struct ib_device *ib_dev, u8 port, |
299 | union ib_gid *gid, struct ib_gid_attr *attr) | |
1da177e4 | 300 | { |
03db3a2d MB |
301 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; |
302 | struct ib_gid_table *table; | |
303 | int ix; | |
304 | ||
305 | table = ports_table[port - rdma_start_port(ib_dev)]; | |
306 | ||
307 | mutex_lock(&table->lock); | |
308 | ||
309 | ix = find_gid(table, gid, attr, false, | |
310 | GID_ATTR_FIND_MASK_GID | | |
311 | GID_ATTR_FIND_MASK_NETDEV | | |
312 | GID_ATTR_FIND_MASK_DEFAULT); | |
313 | if (ix < 0) | |
314 | goto out_unlock; | |
315 | ||
316 | del_gid(ib_dev, port, table, ix, false); | |
317 | ||
318 | out_unlock: | |
319 | mutex_unlock(&table->lock); | |
320 | return 0; | |
321 | } | |
322 | ||
323 | int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, | |
324 | struct net_device *ndev) | |
325 | { | |
326 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
327 | struct ib_gid_table *table; | |
328 | int ix; | |
329 | ||
330 | table = ports_table[port - rdma_start_port(ib_dev)]; | |
331 | ||
332 | mutex_lock(&table->lock); | |
333 | ||
334 | for (ix = 0; ix < table->sz; ix++) | |
335 | if (table->data_vec[ix].attr.ndev == ndev) | |
336 | del_gid(ib_dev, port, table, ix, false); | |
337 | ||
338 | mutex_unlock(&table->lock); | |
339 | return 0; | |
340 | } | |
341 | ||
342 | static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index, | |
343 | union ib_gid *gid, struct ib_gid_attr *attr) | |
344 | { | |
345 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
346 | struct ib_gid_table *table; | |
1da177e4 | 347 | unsigned long flags; |
1da177e4 | 348 | |
03db3a2d | 349 | table = ports_table[port - rdma_start_port(ib_dev)]; |
1da177e4 | 350 | |
03db3a2d MB |
351 | if (index < 0 || index >= table->sz) |
352 | return -EINVAL; | |
1da177e4 | 353 | |
03db3a2d MB |
354 | read_lock_irqsave(&table->data_vec[index].lock, flags); |
355 | if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID) { | |
356 | read_unlock_irqrestore(&table->data_vec[index].lock, flags); | |
357 | return -EAGAIN; | |
358 | } | |
359 | ||
360 | memcpy(gid, &table->data_vec[index].gid, sizeof(*gid)); | |
361 | if (attr) { | |
362 | memcpy(attr, &table->data_vec[index].attr, sizeof(*attr)); | |
363 | if (attr->ndev) | |
364 | dev_hold(attr->ndev); | |
365 | } | |
366 | ||
367 | read_unlock_irqrestore(&table->data_vec[index].lock, flags); | |
368 | return 0; | |
369 | } | |
370 | ||
371 | static int _ib_cache_gid_table_find(struct ib_device *ib_dev, | |
372 | const union ib_gid *gid, | |
373 | const struct ib_gid_attr *val, | |
374 | unsigned long mask, | |
375 | u8 *port, u16 *index) | |
376 | { | |
377 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
378 | struct ib_gid_table *table; | |
379 | u8 p; | |
380 | int local_index; | |
381 | ||
382 | for (p = 0; p < ib_dev->phys_port_cnt; p++) { | |
383 | table = ports_table[p]; | |
384 | local_index = find_gid(table, gid, val, false, mask); | |
385 | if (local_index >= 0) { | |
386 | if (index) | |
387 | *index = local_index; | |
388 | if (port) | |
389 | *port = p + rdma_start_port(ib_dev); | |
390 | return 0; | |
1da177e4 LT |
391 | } |
392 | } | |
1da177e4 | 393 | |
03db3a2d MB |
394 | return -ENOENT; |
395 | } | |
396 | ||
397 | static int ib_cache_gid_find(struct ib_device *ib_dev, | |
398 | const union ib_gid *gid, | |
399 | struct net_device *ndev, u8 *port, | |
400 | u16 *index) | |
401 | { | |
402 | unsigned long mask = GID_ATTR_FIND_MASK_GID; | |
403 | struct ib_gid_attr gid_attr_val = {.ndev = ndev}; | |
404 | ||
405 | if (ndev) | |
406 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
407 | ||
408 | return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val, | |
409 | mask, port, index); | |
410 | } | |
411 | ||
412 | int ib_cache_gid_find_by_port(struct ib_device *ib_dev, | |
413 | const union ib_gid *gid, | |
414 | u8 port, struct net_device *ndev, | |
415 | u16 *index) | |
416 | { | |
417 | int local_index; | |
418 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
419 | struct ib_gid_table *table; | |
420 | unsigned long mask = GID_ATTR_FIND_MASK_GID; | |
421 | struct ib_gid_attr val = {.ndev = ndev}; | |
422 | ||
423 | if (port < rdma_start_port(ib_dev) || | |
424 | port > rdma_end_port(ib_dev)) | |
425 | return -ENOENT; | |
426 | ||
427 | table = ports_table[port - rdma_start_port(ib_dev)]; | |
428 | ||
429 | if (ndev) | |
430 | mask |= GID_ATTR_FIND_MASK_NETDEV; | |
431 | ||
432 | local_index = find_gid(table, gid, &val, false, mask); | |
433 | if (local_index >= 0) { | |
434 | if (index) | |
435 | *index = local_index; | |
436 | return 0; | |
437 | } | |
438 | ||
439 | return -ENOENT; | |
440 | } | |
441 | ||
442 | static struct ib_gid_table *alloc_gid_table(int sz) | |
443 | { | |
444 | unsigned int i; | |
445 | struct ib_gid_table *table = | |
446 | kzalloc(sizeof(struct ib_gid_table), GFP_KERNEL); | |
447 | if (!table) | |
448 | return NULL; | |
449 | ||
450 | table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL); | |
451 | if (!table->data_vec) | |
452 | goto err_free_table; | |
453 | ||
454 | mutex_init(&table->lock); | |
455 | ||
456 | table->sz = sz; | |
457 | ||
458 | for (i = 0; i < sz; i++) | |
459 | rwlock_init(&table->data_vec[i].lock); | |
460 | ||
461 | return table; | |
462 | ||
463 | err_free_table: | |
464 | kfree(table); | |
465 | return NULL; | |
466 | } | |
467 | ||
468 | static void release_gid_table(struct ib_gid_table *table) | |
469 | { | |
470 | if (table) { | |
471 | kfree(table->data_vec); | |
472 | kfree(table); | |
473 | } | |
474 | } | |
475 | ||
476 | static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port, | |
477 | struct ib_gid_table *table) | |
478 | { | |
479 | int i; | |
480 | ||
481 | if (!table) | |
482 | return; | |
483 | ||
484 | for (i = 0; i < table->sz; ++i) { | |
485 | if (memcmp(&table->data_vec[i].gid, &zgid, | |
486 | sizeof(table->data_vec[i].gid))) | |
487 | del_gid(ib_dev, port, table, i, | |
488 | table->data_vec[i].props & | |
489 | GID_ATTR_FIND_MASK_DEFAULT); | |
490 | } | |
491 | } | |
492 | ||
493 | void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port, | |
494 | struct net_device *ndev, | |
495 | enum ib_cache_gid_default_mode mode) | |
496 | { | |
497 | struct ib_gid_table **ports_table = ib_dev->cache.gid_cache; | |
498 | union ib_gid gid; | |
499 | struct ib_gid_attr gid_attr; | |
500 | struct ib_gid_table *table; | |
501 | int ix; | |
502 | union ib_gid current_gid; | |
503 | struct ib_gid_attr current_gid_attr = {}; | |
504 | ||
505 | table = ports_table[port - rdma_start_port(ib_dev)]; | |
506 | ||
507 | make_default_gid(ndev, &gid); | |
508 | memset(&gid_attr, 0, sizeof(gid_attr)); | |
509 | gid_attr.ndev = ndev; | |
510 | ||
17b38fb8 | 511 | mutex_lock(&table->lock); |
03db3a2d MB |
512 | ix = find_gid(table, NULL, NULL, true, GID_ATTR_FIND_MASK_DEFAULT); |
513 | ||
514 | /* Coudn't find default GID location */ | |
515 | WARN_ON(ix < 0); | |
516 | ||
03db3a2d MB |
517 | if (!__ib_cache_gid_get(ib_dev, port, ix, |
518 | ¤t_gid, ¤t_gid_attr) && | |
519 | mode == IB_CACHE_GID_DEFAULT_MODE_SET && | |
520 | !memcmp(&gid, ¤t_gid, sizeof(gid)) && | |
521 | !memcmp(&gid_attr, ¤t_gid_attr, sizeof(gid_attr))) | |
522 | goto unlock; | |
523 | ||
524 | if ((memcmp(¤t_gid, &zgid, sizeof(current_gid)) || | |
525 | memcmp(¤t_gid_attr, &zattr, | |
526 | sizeof(current_gid_attr))) && | |
527 | del_gid(ib_dev, port, table, ix, true)) { | |
528 | pr_warn("ib_cache_gid: can't delete index %d for default gid %pI6\n", | |
529 | ix, gid.raw); | |
530 | goto unlock; | |
531 | } | |
532 | ||
533 | if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) | |
534 | if (add_gid(ib_dev, port, table, ix, &gid, &gid_attr, true)) | |
535 | pr_warn("ib_cache_gid: unable to add default gid %pI6\n", | |
536 | gid.raw); | |
537 | ||
538 | unlock: | |
539 | if (current_gid_attr.ndev) | |
540 | dev_put(current_gid_attr.ndev); | |
541 | mutex_unlock(&table->lock); | |
542 | } | |
543 | ||
544 | static int gid_table_reserve_default(struct ib_device *ib_dev, u8 port, | |
545 | struct ib_gid_table *table) | |
546 | { | |
547 | if (rdma_protocol_roce(ib_dev, port)) { | |
548 | struct ib_gid_table_entry *entry = &table->data_vec[0]; | |
549 | ||
550 | entry->props |= GID_TABLE_ENTRY_DEFAULT; | |
551 | } | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static int _gid_table_setup_one(struct ib_device *ib_dev) | |
557 | { | |
558 | u8 port; | |
559 | struct ib_gid_table **table; | |
560 | int err = 0; | |
561 | ||
562 | table = kcalloc(ib_dev->phys_port_cnt, sizeof(*table), GFP_KERNEL); | |
563 | ||
564 | if (!table) { | |
565 | pr_warn("failed to allocate ib gid cache for %s\n", | |
566 | ib_dev->name); | |
567 | return -ENOMEM; | |
568 | } | |
569 | ||
570 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { | |
571 | u8 rdma_port = port + rdma_start_port(ib_dev); | |
572 | ||
573 | table[port] = | |
574 | alloc_gid_table( | |
575 | ib_dev->port_immutable[rdma_port].gid_tbl_len); | |
576 | if (!table[port]) { | |
577 | err = -ENOMEM; | |
578 | goto rollback_table_setup; | |
579 | } | |
580 | ||
581 | err = gid_table_reserve_default(ib_dev, | |
582 | port + rdma_start_port(ib_dev), | |
583 | table[port]); | |
584 | if (err) | |
585 | goto rollback_table_setup; | |
586 | } | |
587 | ||
588 | ib_dev->cache.gid_cache = table; | |
589 | return 0; | |
590 | ||
591 | rollback_table_setup: | |
592 | for (port = 0; port < ib_dev->phys_port_cnt; port++) { | |
593 | cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev), | |
594 | table[port]); | |
595 | release_gid_table(table[port]); | |
596 | } | |
597 | ||
598 | kfree(table); | |
599 | return err; | |
600 | } | |
601 | ||
602 | static void gid_table_release_one(struct ib_device *ib_dev) | |
603 | { | |
604 | struct ib_gid_table **table = ib_dev->cache.gid_cache; | |
605 | u8 port; | |
606 | ||
607 | if (!table) | |
608 | return; | |
609 | ||
610 | for (port = 0; port < ib_dev->phys_port_cnt; port++) | |
611 | release_gid_table(table[port]); | |
612 | ||
613 | kfree(table); | |
614 | ib_dev->cache.gid_cache = NULL; | |
615 | } | |
616 | ||
617 | static void gid_table_cleanup_one(struct ib_device *ib_dev) | |
618 | { | |
619 | struct ib_gid_table **table = ib_dev->cache.gid_cache; | |
620 | u8 port; | |
621 | ||
622 | if (!table) | |
623 | return; | |
624 | ||
625 | for (port = 0; port < ib_dev->phys_port_cnt; port++) | |
626 | cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev), | |
627 | table[port]); | |
628 | } | |
629 | ||
630 | static int gid_table_setup_one(struct ib_device *ib_dev) | |
631 | { | |
632 | int err; | |
633 | ||
634 | err = _gid_table_setup_one(ib_dev); | |
635 | ||
636 | if (err) | |
637 | return err; | |
638 | ||
639 | err = roce_rescan_device(ib_dev); | |
640 | ||
641 | if (err) { | |
642 | gid_table_cleanup_one(ib_dev); | |
643 | gid_table_release_one(ib_dev); | |
644 | } | |
645 | ||
646 | return err; | |
647 | } | |
648 | ||
649 | int ib_get_cached_gid(struct ib_device *device, | |
650 | u8 port_num, | |
651 | int index, | |
652 | union ib_gid *gid) | |
653 | { | |
654 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) | |
655 | return -EINVAL; | |
656 | ||
657 | return __ib_cache_gid_get(device, port_num, index, gid, NULL); | |
658 | } | |
659 | EXPORT_SYMBOL(ib_get_cached_gid); | |
660 | ||
661 | int ib_find_cached_gid(struct ib_device *device, | |
662 | const union ib_gid *gid, | |
663 | u8 *port_num, | |
664 | u16 *index) | |
665 | { | |
666 | return ib_cache_gid_find(device, gid, NULL, port_num, index); | |
1da177e4 LT |
667 | } |
668 | EXPORT_SYMBOL(ib_find_cached_gid); | |
669 | ||
670 | int ib_get_cached_pkey(struct ib_device *device, | |
671 | u8 port_num, | |
672 | int index, | |
673 | u16 *pkey) | |
674 | { | |
675 | struct ib_pkey_cache *cache; | |
676 | unsigned long flags; | |
677 | int ret = 0; | |
678 | ||
0cf18d77 | 679 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
1da177e4 LT |
680 | return -EINVAL; |
681 | ||
682 | read_lock_irqsave(&device->cache.lock, flags); | |
683 | ||
0cf18d77 | 684 | cache = device->cache.pkey_cache[port_num - rdma_start_port(device)]; |
1da177e4 LT |
685 | |
686 | if (index < 0 || index >= cache->table_len) | |
687 | ret = -EINVAL; | |
688 | else | |
689 | *pkey = cache->table[index]; | |
690 | ||
691 | read_unlock_irqrestore(&device->cache.lock, flags); | |
692 | ||
693 | return ret; | |
694 | } | |
695 | EXPORT_SYMBOL(ib_get_cached_pkey); | |
696 | ||
697 | int ib_find_cached_pkey(struct ib_device *device, | |
698 | u8 port_num, | |
699 | u16 pkey, | |
700 | u16 *index) | |
701 | { | |
702 | struct ib_pkey_cache *cache; | |
703 | unsigned long flags; | |
704 | int i; | |
705 | int ret = -ENOENT; | |
ff7166c4 | 706 | int partial_ix = -1; |
1da177e4 | 707 | |
0cf18d77 | 708 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
1da177e4 LT |
709 | return -EINVAL; |
710 | ||
711 | read_lock_irqsave(&device->cache.lock, flags); | |
712 | ||
0cf18d77 | 713 | cache = device->cache.pkey_cache[port_num - rdma_start_port(device)]; |
1da177e4 LT |
714 | |
715 | *index = -1; | |
716 | ||
717 | for (i = 0; i < cache->table_len; ++i) | |
718 | if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) { | |
ff7166c4 JM |
719 | if (cache->table[i] & 0x8000) { |
720 | *index = i; | |
721 | ret = 0; | |
722 | break; | |
723 | } else | |
724 | partial_ix = i; | |
1da177e4 LT |
725 | } |
726 | ||
ff7166c4 JM |
727 | if (ret && partial_ix >= 0) { |
728 | *index = partial_ix; | |
729 | ret = 0; | |
730 | } | |
731 | ||
1da177e4 LT |
732 | read_unlock_irqrestore(&device->cache.lock, flags); |
733 | ||
734 | return ret; | |
735 | } | |
736 | EXPORT_SYMBOL(ib_find_cached_pkey); | |
737 | ||
73aaa741 JM |
738 | int ib_find_exact_cached_pkey(struct ib_device *device, |
739 | u8 port_num, | |
740 | u16 pkey, | |
741 | u16 *index) | |
742 | { | |
743 | struct ib_pkey_cache *cache; | |
744 | unsigned long flags; | |
745 | int i; | |
746 | int ret = -ENOENT; | |
747 | ||
0cf18d77 | 748 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
73aaa741 JM |
749 | return -EINVAL; |
750 | ||
751 | read_lock_irqsave(&device->cache.lock, flags); | |
752 | ||
0cf18d77 | 753 | cache = device->cache.pkey_cache[port_num - rdma_start_port(device)]; |
73aaa741 JM |
754 | |
755 | *index = -1; | |
756 | ||
757 | for (i = 0; i < cache->table_len; ++i) | |
758 | if (cache->table[i] == pkey) { | |
759 | *index = i; | |
760 | ret = 0; | |
761 | break; | |
762 | } | |
763 | ||
764 | read_unlock_irqrestore(&device->cache.lock, flags); | |
765 | ||
766 | return ret; | |
767 | } | |
768 | EXPORT_SYMBOL(ib_find_exact_cached_pkey); | |
769 | ||
6fb9cdbf JM |
770 | int ib_get_cached_lmc(struct ib_device *device, |
771 | u8 port_num, | |
772 | u8 *lmc) | |
773 | { | |
774 | unsigned long flags; | |
775 | int ret = 0; | |
776 | ||
0cf18d77 | 777 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
6fb9cdbf JM |
778 | return -EINVAL; |
779 | ||
780 | read_lock_irqsave(&device->cache.lock, flags); | |
0cf18d77 | 781 | *lmc = device->cache.lmc_cache[port_num - rdma_start_port(device)]; |
6fb9cdbf JM |
782 | read_unlock_irqrestore(&device->cache.lock, flags); |
783 | ||
784 | return ret; | |
785 | } | |
786 | EXPORT_SYMBOL(ib_get_cached_lmc); | |
787 | ||
1da177e4 LT |
788 | static void ib_cache_update(struct ib_device *device, |
789 | u8 port) | |
790 | { | |
791 | struct ib_port_attr *tprops = NULL; | |
792 | struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache; | |
03db3a2d MB |
793 | struct ib_gid_cache { |
794 | int table_len; | |
795 | union ib_gid table[0]; | |
796 | } *gid_cache = NULL; | |
1da177e4 LT |
797 | int i; |
798 | int ret; | |
03db3a2d MB |
799 | struct ib_gid_table *table; |
800 | struct ib_gid_table **ports_table = device->cache.gid_cache; | |
801 | bool use_roce_gid_table = | |
802 | rdma_cap_roce_gid_table(device, port); | |
803 | ||
804 | if (port < rdma_start_port(device) || port > rdma_end_port(device)) | |
805 | return; | |
806 | ||
807 | table = ports_table[port - rdma_start_port(device)]; | |
1da177e4 LT |
808 | |
809 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); | |
810 | if (!tprops) | |
811 | return; | |
812 | ||
813 | ret = ib_query_port(device, port, tprops); | |
814 | if (ret) { | |
815 | printk(KERN_WARNING "ib_query_port failed (%d) for %s\n", | |
816 | ret, device->name); | |
817 | goto err; | |
818 | } | |
819 | ||
820 | pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len * | |
821 | sizeof *pkey_cache->table, GFP_KERNEL); | |
822 | if (!pkey_cache) | |
823 | goto err; | |
824 | ||
825 | pkey_cache->table_len = tprops->pkey_tbl_len; | |
826 | ||
03db3a2d MB |
827 | if (!use_roce_gid_table) { |
828 | gid_cache = kmalloc(sizeof(*gid_cache) + tprops->gid_tbl_len * | |
829 | sizeof(*gid_cache->table), GFP_KERNEL); | |
830 | if (!gid_cache) | |
831 | goto err; | |
1da177e4 | 832 | |
03db3a2d MB |
833 | gid_cache->table_len = tprops->gid_tbl_len; |
834 | } | |
1da177e4 LT |
835 | |
836 | for (i = 0; i < pkey_cache->table_len; ++i) { | |
837 | ret = ib_query_pkey(device, port, i, pkey_cache->table + i); | |
838 | if (ret) { | |
839 | printk(KERN_WARNING "ib_query_pkey failed (%d) for %s (index %d)\n", | |
840 | ret, device->name, i); | |
841 | goto err; | |
842 | } | |
843 | } | |
844 | ||
03db3a2d MB |
845 | if (!use_roce_gid_table) { |
846 | for (i = 0; i < gid_cache->table_len; ++i) { | |
847 | ret = ib_query_gid(device, port, i, | |
848 | gid_cache->table + i); | |
849 | if (ret) { | |
850 | printk(KERN_WARNING "ib_query_gid failed (%d) for %s (index %d)\n", | |
851 | ret, device->name, i); | |
852 | goto err; | |
853 | } | |
1da177e4 LT |
854 | } |
855 | } | |
856 | ||
857 | write_lock_irq(&device->cache.lock); | |
858 | ||
0cf18d77 | 859 | old_pkey_cache = device->cache.pkey_cache[port - rdma_start_port(device)]; |
1da177e4 | 860 | |
0cf18d77 | 861 | device->cache.pkey_cache[port - rdma_start_port(device)] = pkey_cache; |
03db3a2d MB |
862 | if (!use_roce_gid_table) { |
863 | for (i = 0; i < gid_cache->table_len; i++) { | |
864 | modify_gid(device, port, table, i, gid_cache->table + i, | |
865 | &zattr, false); | |
866 | } | |
867 | } | |
1da177e4 | 868 | |
0cf18d77 | 869 | device->cache.lmc_cache[port - rdma_start_port(device)] = tprops->lmc; |
6fb9cdbf | 870 | |
1da177e4 LT |
871 | write_unlock_irq(&device->cache.lock); |
872 | ||
03db3a2d | 873 | kfree(gid_cache); |
1da177e4 | 874 | kfree(old_pkey_cache); |
1da177e4 LT |
875 | kfree(tprops); |
876 | return; | |
877 | ||
878 | err: | |
879 | kfree(pkey_cache); | |
880 | kfree(gid_cache); | |
881 | kfree(tprops); | |
882 | } | |
883 | ||
c4028958 | 884 | static void ib_cache_task(struct work_struct *_work) |
1da177e4 | 885 | { |
c4028958 DH |
886 | struct ib_update_work *work = |
887 | container_of(_work, struct ib_update_work, work); | |
1da177e4 LT |
888 | |
889 | ib_cache_update(work->device, work->port_num); | |
890 | kfree(work); | |
891 | } | |
892 | ||
893 | static void ib_cache_event(struct ib_event_handler *handler, | |
894 | struct ib_event *event) | |
895 | { | |
896 | struct ib_update_work *work; | |
897 | ||
898 | if (event->event == IB_EVENT_PORT_ERR || | |
899 | event->event == IB_EVENT_PORT_ACTIVE || | |
900 | event->event == IB_EVENT_LID_CHANGE || | |
901 | event->event == IB_EVENT_PKEY_CHANGE || | |
acaea9ee | 902 | event->event == IB_EVENT_SM_CHANGE || |
761d90ed OG |
903 | event->event == IB_EVENT_CLIENT_REREGISTER || |
904 | event->event == IB_EVENT_GID_CHANGE) { | |
1da177e4 LT |
905 | work = kmalloc(sizeof *work, GFP_ATOMIC); |
906 | if (work) { | |
c4028958 | 907 | INIT_WORK(&work->work, ib_cache_task); |
1da177e4 LT |
908 | work->device = event->device; |
909 | work->port_num = event->element.port_num; | |
f0626710 | 910 | queue_work(ib_wq, &work->work); |
1da177e4 LT |
911 | } |
912 | } | |
913 | } | |
914 | ||
03db3a2d | 915 | int ib_cache_setup_one(struct ib_device *device) |
1da177e4 LT |
916 | { |
917 | int p; | |
03db3a2d | 918 | int err; |
1da177e4 LT |
919 | |
920 | rwlock_init(&device->cache.lock); | |
921 | ||
922 | device->cache.pkey_cache = | |
55aeed06 | 923 | kzalloc(sizeof *device->cache.pkey_cache * |
0cf18d77 | 924 | (rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL); |
6fb9cdbf | 925 | device->cache.lmc_cache = kmalloc(sizeof *device->cache.lmc_cache * |
0cf18d77 IW |
926 | (rdma_end_port(device) - |
927 | rdma_start_port(device) + 1), | |
6fb9cdbf | 928 | GFP_KERNEL); |
03db3a2d | 929 | if (!device->cache.pkey_cache || |
6fb9cdbf | 930 | !device->cache.lmc_cache) { |
1da177e4 LT |
931 | printk(KERN_WARNING "Couldn't allocate cache " |
932 | "for %s\n", device->name); | |
03db3a2d | 933 | return -ENOMEM; |
1da177e4 LT |
934 | } |
935 | ||
03db3a2d MB |
936 | err = gid_table_setup_one(device); |
937 | if (err) | |
938 | /* Allocated memory will be cleaned in the release function */ | |
939 | return err; | |
940 | ||
55aeed06 | 941 | for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p) |
0cf18d77 | 942 | ib_cache_update(device, p + rdma_start_port(device)); |
1da177e4 LT |
943 | |
944 | INIT_IB_EVENT_HANDLER(&device->cache.event_handler, | |
945 | device, ib_cache_event); | |
03db3a2d MB |
946 | err = ib_register_event_handler(&device->cache.event_handler); |
947 | if (err) | |
948 | goto err; | |
1da177e4 | 949 | |
03db3a2d | 950 | return 0; |
1da177e4 LT |
951 | |
952 | err: | |
03db3a2d MB |
953 | gid_table_cleanup_one(device); |
954 | return err; | |
1da177e4 LT |
955 | } |
956 | ||
03db3a2d | 957 | void ib_cache_release_one(struct ib_device *device) |
1da177e4 LT |
958 | { |
959 | int p; | |
960 | ||
03db3a2d MB |
961 | /* |
962 | * The release function frees all the cache elements. | |
963 | * This function should be called as part of freeing | |
964 | * all the device's resources when the cache could no | |
965 | * longer be accessed. | |
966 | */ | |
967 | if (device->cache.pkey_cache) | |
968 | for (p = 0; | |
969 | p <= rdma_end_port(device) - rdma_start_port(device); ++p) | |
970 | kfree(device->cache.pkey_cache[p]); | |
971 | ||
972 | gid_table_release_one(device); | |
1da177e4 | 973 | kfree(device->cache.pkey_cache); |
6fb9cdbf | 974 | kfree(device->cache.lmc_cache); |
1da177e4 LT |
975 | } |
976 | ||
03db3a2d MB |
977 | void ib_cache_cleanup_one(struct ib_device *device) |
978 | { | |
979 | /* The cleanup function unregisters the event handler, | |
980 | * waits for all in-progress workqueue elements and cleans | |
981 | * up the GID cache. This function should be called after | |
982 | * the device was removed from the devices list and all | |
983 | * clients were removed, so the cache exists but is | |
984 | * non-functional and shouldn't be updated anymore. | |
985 | */ | |
986 | ib_unregister_event_handler(&device->cache.event_handler); | |
987 | flush_workqueue(ib_wq); | |
988 | gid_table_cleanup_one(device); | |
989 | } | |
1da177e4 | 990 | |
03db3a2d | 991 | void __init ib_cache_setup(void) |
1da177e4 | 992 | { |
03db3a2d | 993 | roce_gid_mgmt_init(); |
1da177e4 LT |
994 | } |
995 | ||
996 | void __exit ib_cache_cleanup(void) | |
997 | { | |
03db3a2d | 998 | roce_gid_mgmt_cleanup(); |
1da177e4 | 999 | } |